Link and/or clasp, for example of a jewelry chain

Abstract

The present invention relates to a detachable link for a piece of jewelry or watchmaking, for example for a chain, a bracelet and/or a necklace. In one embodiment, the link comprises two main elements forming the link, as well as a bolt arranged to connect the two elements in a detachable manner. The bolt comprises successive distinct zones and is arranged to be able to perform an axial movement in order to move to an unlocked position.

Description

The present application claims priority to EP Application No. 25161130.7, filed Feb. 28, 2025.

TECHNICAL FIELD

The present invention relates to jewelry and watchmaking, and more particularly to chains, necklaces and/or bracelets, including bracelets for wrist watches. In one aspect, the invention relates to a link and/or a clasp, arranged to be integrated into a chain and/or to be detached from the chain.

TECHNICAL PROBLEM UNDERLYING THE INVENTION

In the field of chains and bracelets for jewelry and watchmaking, it is desirable to be able to remove a link from the chain to shorten or lengthen it, and also to open the chain, for example where a buckle and/or a clasp is not present.

An objective of the invention is to provide a chain and/or a link arranged to permit the removal and/or addition of a link to/from the chain and/or a bracelet.

In the field of ornamental jewelry and watchmaking, and more particularly ornamental chains, for example chains for necklaces or bracelets, the requirements for miniaturisation and/or aesthetics constitute significant constraints on implementing a solution to the objective defined above. For example, a mechanism allowing the detachment of a link from an ornamental chain and/or bracelet must necessarily be made from very small parts (between one millimetre and one or two centimetres, depending on the part), which imposes challenges in terms of manufacturing the parts, their assembly and also the reliability of the mechanism. To avoid loss of the bracelet and/or necklace, it is important that a detachable link does not open accidentally, for example due to the link or chain catching on a garment and/or due to an impact with any object.

Furthermore, due to the need for aesthetics, it is advantageous to implement a mechanism that can be realised in a form that is little or not visible from the outside, and that does not necessarily include protruding structures, such as actuating members, which interfere with the overall design of the chain links.

The following documents disclose clasps that pertain more or less to the field of the present invention, but do not disclose links for chains according to the invention: KR200334455Y1, U.S. Pat. No. 7,082,651, and U.S. Pat. No. 6,484,376. CN207055005U discloses a clasp for a belt.

The present invention provides a link and/or a clasp for a chain, in particular an ornamental chain, and/or for jewelry, which achieves the aforementioned objectives.

SUMMARY OF THE INVENTION

In one aspect, the present invention relates to a link, for example of a bracelet, a necklace, a chain and/or any item of jewelry or watchmaking, comprising first and second elements that can be connected, preferably rigidly, to one another so as to form said link, and wherein said elements are arranged to be able to conduct a movement relative to one another and/or to be detached one from the other.

In another aspect, the present invention relates to a clasp for an item of jewelry or watchmaking, for example the clasp of a bracelet, comprising the first and second elements.

In some embodiments, the clasp is a clasp of a chain. The chain may but need not be part of the invention, as the invention may encompass a single link and/or only the clasp.

In yet another aspect, the present invention relates to a connection system, preferably for an item of jewelry or watchmaking, comprising the first and second elements.

In an aspect, the invention provides a piece of jewelry comprising the link and/or the clasp of the invention.

Preferably, movement of the first element relative to the second element allows for the opening of the link, the clasp and/or the connection system, for example in order to separate the link from another link and/or to add the link to another link, preferably to the chain.

In the present description, the term ‘link’ is generally used, whereas the subject of the invention may also be regarded as a clasp, or may even specifically be realised in the form of a clasp, or, more generally, may be a connection system.

In a preferred embodiment, the movement results in and/or may cause the complete separation of said first and second elements.

In another embodiment, the first and second elements remain connected and/or fixed together despite and/or during the movement. For example, the link comprises a hinge or another articulation connecting said first and second elements. In this case, said movement causes an opening of the link allowing, for example, the removal of the link from another link and/or from the chain.

In a preferred embodiment, said link is configured to allow said second element to move in a guided and/or predefined direction during said relative movement. For example, the second element moves in a longitudinal direction, in a linear movement, preferably in a translational movement. More preferably, the second element moves along a longitudinal direction of the second element and/or perpendicularly with respect to a main axis of the first element and/or with respect to an axis of a lock and/or bolt arranged in the first element.

The bolt is preferably a locking bolt. More specifically, the bolt is preferably a sliding locking bar. For the purpose of the present invention, the terms “bolt” and “sliding locking bar” are exchangeable.

In a preferred embodiment, said first element includes a housing and first and second openings providing access to said housing. Preferably, a bolt is arranged and/or housed in said housing.

In one embodiment, the first element comprises a body in which, for example, said housing and/or said first and second openings are machined.

In a preferred embodiment, said bolt is movably housed in the housing. Preferably, said bolt is arranged so as to be able to perform a linear movement, preferably a translational movement, more preferably an axial movement, along the axis of the bolt, and/or along the longitudinal extent of the bolt.

In one embodiment, the bolt is connected with the first element and/or forms part of the first element, in particular when the link is assembled and/or in an operating state, for example connected to other links. In one embodiment, the bolt is arranged in the housing of the first element and can assume locked and unlocked positions, preferably when the bolt is housed in the first element.

In one embodiment, the bolt is operable by and/or through an opening in the first element, preferably said first opening.

In a preferred embodiment, the bolt comprises and/or is operable by an actuating member. The actuating member is preferably arranged to allow activation of the bolt by and/or through said first opening.

In a preferred embodiment, the second element comprises an insert, preferably arranged to be insertable into said housing through said second opening.

In a preferred embodiment, the bolt comprises a cooperation zone and the insert comprises a cooperating structure.

In a preferred embodiment, said cooperation zone and structure are arranged in a locked position to prevent said movement between the first and second elements in the absence of actuation of said bolt and/or the actuating member.

In a preferred embodiment, said link and/or clasp comprises or forms a loop comprising a perimeter and wherein each of said first and second elements provides a part of said perimeter.

In a preferred embodiment, said first element and said second element form together a closed loop when they are secured together and/or when said link and/or clasp are in said locked position.

In a preferred embodiment, said first element and said second element surround, in a position of use, a space, wherein said surrounded space is defined partly by said first element and partly by said second element.

The space or loop forms preferably a passage, allowing another link to pass through and to be connected to the link or clasp in the same manner as an other link of a chain, as is typical for links of a chain. In such a chain, links comprise a closed loop that is interlinked with one or two other links comprising a substantially closed loop.

In one embodiment, said cooperation zone and structure are arranged so as to be able to transition, by actuation of said bolt, from a locked position, in which said movement is prevented, to an unlocked position, in which said movement is possible.

In a preferred embodiment, said cooperation zone and structure are arranged in an unlocked position to allow said movement in the presence of actuation of said bolt and/or of an actuating member arranged to act on and/or move the bolt.

In one embodiment, the locked and open positions of the link may also be distinguished. In the locked position, the first and second elements are fixed to one another, preferably rigidly connected to one another, and preferably form a closed loop, for example a functional link configured to serve as a chain link and/or a clasp. In the unlocked position, the second element can move relative to the first element and the link is preferably open and/or at least provides an opening, allowing the link to be separated from another link.

In a preferred embodiment, the link comprises a return element arranged in said housing, and/or in an extension of said housing, to urge said bolt into the locked position. Preferably, the return element is an elastic element, for example a spring, preferably a compression spring. The spring is preferably coaxial with the bolt.

In a preferred embodiment, said bolt is arranged to move axially and/or along its longitudinal extension so as to move from said locked to said unlocked positions and vice versa.

In a preferred embodiment, said second element is arranged to move in a direction perpendicular to an axis of the bolt.

In a preferred embodiment, said insert is arranged to move in a direction perpendicular to an axis of the bolt.

In one embodiment, said first element is arranged transversely, for example with respect to the direction of a bracelet, a necklace and/or a chain, with the link being incorporated into the bracelet, necklace and/or chain.

In one embodiment, said second element is arranged longitudinally, the two free ends of the second element in particular being arranged longitudinally when the link is incorporated into a chain; the longitudinal direction preferably being that of the overall extension of the chain.

In a preferred embodiment, the second opening is arranged perpendicular to the first opening.

In one embodiment, the second opening is arranged and/or oriented along a longitudinal direction, for example the direction of a chain comprising the link.

In a preferred embodiment, said lock comprises a cooperation zone and a clearance zone.

In a preferred embodiment, the bolt has shapes and/or dimensions that vary and/or change along a longitudinal extent and/or along an axial direction of the bolt.

Preferably, the bolt forms and/or comprises a cooperation zone on a region along its longitudinal extension and/or along an axial direction, the cooperation zone being arranged to block the insert in the housing in the locked position, optionally with the aid of the housing wall(s).

Preferably, the bolt defines and/or comprises, on a zone along its longitudinal extension and/or along an axial direction, a clearance zone, arranged to define, optionally with the housing wall(s), a clearance path allowing the insert and/or the second cooperating structure to exit the housing, preferably through said second opening.

In a preferred embodiment, said cooperation zone comprises (or forms) a thickened portion and/or a part having a larger dimension in at least one spatial direction compared with a clearance zone of the bolt.

In a preferred embodiment, said clearance zone comprises a rod, a pin and/or a cylinder, preferably of reduced dimension (for example: reduced diameter) compared with that of the cooperation zone.

In a preferred embodiment, said bolt comprises an actuating member. Preferably, the head and/or an end of the bolt forms the actuating member.

In a preferred embodiment, said bolt comprises and/or consists substantially cylindrical sections having different diameters. Preferably, the bold is substantially cylindrical.

In one embodiment, the end/head of the bolt is flush with an outer surface of the first element, preferably in the locked and/or rest position.

Preferably, the end/head covers and/or closes said first opening at least partially.

In another embodiment, the end/head of the bolt protrudes from an outer surface of the first element.

Preferably, said bolt comprises a head and/or end accessible from the outside and arranged to be pressed to move the bolt to the unlocked position and/or to permit movement of the bolt. In an embodiment, the head is accessible with a sharp, thin and/or elongated object, such as a needle, the tip of a screwdriver, and/or the tip of a pen. In another embodiment, the actuating member is operable by hand.

In an embodiment, the actuating member is a push button.

In an embodiment, the lock comprises first and second zones, namely the cooperation zone and the clearance zone. The first zone of the lock is preferably arranged to be in contact with the cooperating structure so as to block and/or lock the first element relative to the second element and/or to keep said first and second elements connected. The second zone of the lock, the clearance zone, is preferably arranged to cooperate so as to allow said movement between said first and second elements.

Preferably, the cooperation zone of the lock is aligned with the cooperating structure in the locked position. Preferably, in the unlocked position, the lock's clearance zone is aligned with said cooperating structure so as to allow said relative movement, preferably the separation of the first and second elements.

Preferably, the cooperation zone and cooperating structure comprise complementary shapes and/or structures, arranged to allow said locking.

Preferably, the lock's clearance zone and the insert's cooperating structure comprise complementary shapes and/or structures, arranged to allow said unlocking and/or said relative movement.

In one embodiment, in the locked position, the said cooperating structure and cooperation zone are aligned and/or in contact with one another in said housing so as to effect locking of the insert in the housing, the locking preventing said movement between the first and second elements.

In one embodiment, in said unlocked position, said cooperating structure is aligned with a clearance zone of said bolt, said clearance zone no longer preventing said movement between the first and second elements.

In one embodiment, the first zone of the lock is a first cooperation zone.

In one embodiment, the clearance zone comprises or is a zone of reduced dimension in at least one spatial direction, preferably reduced relative to the cooperation zone.

In one embodiment, said cooperating structure is shaped, optionally together with one or more inner walls of said housing, so as to delimit a space arranged to receive said bolt, and/or to form a contact surface to cooperate with the bolt, in particular with the lock's cooperation zone, so as to retain the insert in the housing in the locked position.

In one embodiment, said cooperating structure is shaped, optionally together with one or more inner walls of said housing, so as to delimit a passage and/or a recess, arranged to allow the cooperating structure to move relative to the bolt and to separate the insert from the bolt in the unlocked position.

In one embodiment, the insert comprises a second cooperating structure, which may be a recess, arranged to allow the lock's clearance zone to pass through.

In a preferred embodiment, the insert of the second element comprises a first passage and/or a hook, preferably arranged to receive said bolt in the locked position.

In a preferred embodiment, the insert comprises a second passage, preferably arranged to allow the insert to be separated from the bolt in the unlocked position. Preferably, the second passage is sized to allow the insert to clear the bolt, in particular the second part of the bolt, through said second passage.

Preferably, movement of the lock from a locked position to an unlocked position allows the said first parts of the insert and of the lock, respectively, to separate and/or aligns the said second parts of the insert and of the lock, respectively, to allow separation of the first and second elements.

In a preferred embodiment, said space is bounded at least in part by the cooperating structure.

In a preferred embodiment, said recess is sized to allow the lock's clearance zone and the cooperating structure to intersect and/or move so as to separate the insert and/or the second element from the lock and/or from the first element.

Said second passage is preferably arranged and/or sized to allow the lock's clearance zone to pass through said space and/or said recess in order to separate the insert and/or the second element from the lock and/or from the first element. The separation preferably releases the insert from the connection formed by the lock, said connection securing the first and second elements of the link.

In a preferred embodiment, said bolt comprises at least two, preferably at least three, at least four and even five structures and/or zones having different functions, dimensions and/or shapes, in particular compared to a preceding and/or following zone. Said at least two (three, etc.) structures and/or zones are preferably arranged and/or form different sections and/or zones of the bolt along its longitudinal axis. Preferably, these structures are arranged on successive zones in an axial and/or transverse direction. In the embodiment shown in the figures, the bolt comprises a blocking and/or locking zone, a connection zone and an actuating member, preferably arranged on successive zones along the axis of the lock. The bolt may further comprise a housing or support for a return element and, optionally, a housing for an end stop, in particular a travel limit stop.

In a preferred embodiment, said bolt comprises a clearance zone, and/or a housing and/or at least one supporting structure arranged to accommodate an end of a return element, to stabilise the return element, and/or to form a support for the return element.

Preferably, said clearance zone connects and/or separates said cooperation zone and said actuating member.

In a preferred embodiment, the successive zones that constitute the bolt are integral with one another and/or are made as a single piece.

In one embodiment, the guiding of the bolt is provided by two zones, separated by the clearance (or unlocking) zone, preferably by a guiding zone and/or the cooperation zone. These two guiding zones may have the same diameter. The guiding zone is preferably connected to the actuating member and/or forms the actuating member.

In an embodiment, the first element comprises a body, wherein said housing is provided in said body. The body is preferably realized in one piece.

In an embodiment, the body of the first element provides or forms a part of the perimeter of a loop formed by said first and second elements.

In one embodiment, the cooperation zone contributes to guiding the bolt in a channel that forms part of the housing in the body of the first element.

In a preferred embodiment, the link comprises a separate retaining part, preferably arranged to block the bolt in said housing. The retaining part is a separate piece. In one embodiment, the retaining part is positioned on the bolt and/or on the first element and arranged to retain the bolt in its housing. In one embodiment, the retaining part forms a shoulder on the bolt, said shoulder being capable of forming an end stop. Preferably, the retaining part is a retaining clip.

In a preferred embodiment, the separate retaining part forms and/or comprises an end stop, preferably arranged to limit the axial movement of the lock.

In one embodiment, the retaining part is disposed on the bolt, preferably so as to move with the bolt. In this case, the retaining part is a travel limit stop. The retaining part may be arranged to abut against a wall of the housing so as to prevent the bolt from exiting the housing.

In another embodiment, the retaining part is rigidly connected to the first element, for example in or on the housing, preferably so as to remain immobile in or on the housing and/or to form a stop inside the housing. In this case, the bolt may include an end stop (a travel limit stop) intended to abut against the retaining part connected to the first element, in order to prevent the bolt from leaving the housing. The retaining part may be a ring or a retaining rim.

More generally, the first element comprises an arrangement for retaining the bolt in the housing and/or preventing the bolt from exiting the housing through the first opening.

In a preferred embodiment, the insert is arranged on a first zone and/or end of the second element.

In a preferred embodiment, the second element comprises a second zone and/or end, separate from said first zone and/or end.

In a preferred embodiment, said first element comprises a third opening, preferably providing access to a second housing. The second housing may be completely separate from the first housing.

In one embodiment, the second housing is arranged to receive a second zone and/or end of the second element.

In a preferred embodiment, said insert is provided and/or forms a first end of the second element, and wherein the second element comprises a second end, separate from said first end, wherein said first and second ends are rigidly connected and preferably in one piece.

In a preferred embodiment, said insert is a first insert and wherein the second element comprises a second insert. The second insert is preferably provided for being able to be inserted into the first element, for example through a third opening.

In a preferred embodiment, the second element includes a longitudinal and/or oblong part that is curved and/or folded, for example in the form of a U, a Ω, a horseshoe, an open O and/or an open circle. In one embodiment, said insert is arranged on and/or forms an end of at least one of the two arms of said U, of said Ω, of the horseshoe, of said open O and/or of said open circle.

In another embodiment, the second element comprises a closed loop, for example a circle, an O, a 0, or another closed structure or form, such as one closed on itself.

In one embodiment, the insert is arranged on and/or formed by a free end of said longitudinal and/or oblong part.

In a preferred embodiment, said second element is a rigid element, preferably made in one piece. The first and second elements may, independently, comprise or consist essentially of metal, from a composite material and/or a material comprising carbon fiber and/or forged carbon. For example, the composite material may comprise carbon fiber.

In an embodiment, said first and second inserts are rigidly connected and/or are in one piece with said second element.

In one embodiment, a first insert is arranged on the first zone/end and a second insert is preferably arranged on the second zone/end.

In a preferred embodiment, the first element comprises first and second support structures.

In one embodiment, the first element comprises a connection structure connecting said first and second support structures.

In one embodiment, the first support structure comprises at least a first housing. The first support structure preferably comprises the first and second openings and/or first and second channels.

In one embodiment, the second support structure comprises said second housing and/or a third opening providing access to said second housing. For example, the second support structure comprises a third channel.

In an embodiment, the link and/or clasp of the invention consists of 5-10 pieces, preferably 5-7 pieces, and most preferably just 8 pieces, which comprise the body of the first element, the second element, the bolt, the return element or spring, and the retainer part.

In one embodiment, the length of the link and/or the clasp of the invention, measured along its maximum extension, is less than 4 cm, preferably less than 3 cm, more preferably less than 2.5 cm, for example less than 2 cm. In one embodiment, the maximum length is between 0.5 and 2 cm, preferably between 0.5 and 1.5 cm.

Other aspects and preferred embodiments of the invention are defined in the dependent claims and in the description below.

DESCRIPTION OF THE DRAWINGS

The features and advantages of the invention will become clearer on reading a non-limiting description of some preferred embodiments. This description is given by way of example only, with reference to the schematic figures in which:

FIGS. 1A, 1B and 1C show a perspective view, a side elevation and a top view of a link according to a first embodiment of the invention.

FIG. 2 shows an exploded perspective view of the link shown in FIGS. 1A-1C.

FIG. 3 shows a sectional view along A-A in FIG. 1B.

FIGS. 4A and 4B show enlarged views of the section shown in FIG. 3, with the locking mechanism locked (FIG. 4A) and unlocked (FIG. 4B).

FIG. 5 shows a cross-sectional view along B-B in FIG. 1C.

FIG. 6 is a semi-transparent perspective view of the link shown in FIGS. 1A-1C.

FIGS. 7A, 7B and 7C show a perspective view, a cross-sectional view and an exploded perspective view, respectively, of a link according to a second embodiment.

FIG. 8A shows a cross-sectional view of the link according to a third embodiment.

FIG. 8B shows an enlarged detail of FIG. 8A.

FIG. 9 shows an excerpt of a chain, for example of a bracelet or a necklace, fitted with a clasp according to an embodiment of the invention.

FIGS. 10A and 10B show perspective views of an excerpt of a chain fitted with a clasp according to an embodiment of the invention, in the open position (FIG. 10A) and the closed position (FIG. 10B).

FIGS. 11A and 11B show perspective views of a connection system according to an embodiment of the invention, in the closed position and in exploded view.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The FIGS. 1A, 1B and 1C show a link 10 in an in-use and/or service position according to an embodiment, the link comprising first and second elements 1 and 2. In this in-use position, the first and second elements are joined to one another and preferably rigidly connected, so as to form the closed link and/or the loop of a chain, capable of forming a chain with other links of the same type or of a different type.

The first and second elements 1, 2 form a closed loop, which thereby encloses and/or surrounds a space 3, wherein the space forms or is a passage or hole. The passage allows another link to pass through and to be connected to the link or clasp of the invention like any other link, preferably in a typical chain-like manner. The link or clasp of the invention can thus be integrated into a chain or be connected to a chain.

The link 10 may be connected to another link that passes through said loop, as is customary for chain links.

The first and second elements each enclose or surround a portion of the closed space 3; that is, the two elements together form the loop of the link and are necessary for the link to function as such. This feature distinguishes this embodiment from the devices shown in FIGS. 10A-11B, in which a link is contained in and/or formed solely by the second element (FIGS. 10A and 10B) or a link surrounding a space is absent (FIGS. 11A and 11B).

In one embodiment, the two elements 1, 2 are the main elements forming and/or constituting the link. The link also comprises a bolt 14 arranged to connect the two elements in a detachable manner.

The link 10, and in the embodiment shown the first element 1, comprises a body 1.1. The first element, in particular the body 1.1, comprises an opening 11. An actuating member 17, here in the form of a protruding push button, is arranged so that it can be depressed to unlock the first element relative to the second element, which allows the first and second elements to move relative to each other so as to open the loop formed by said first and second elements. Opening the loop allows the link to be separated from another link and/or added to another link, for example to a chain comprising the link of the invention.

In the embodiment shown, unlocking allows the first and second elements to be completely separated.

The locking mechanism of the first and second elements will be described with reference to FIGS. 2, 3, 4, 5 and 6. The views of FIGS. 1A-1C show the simplicity of the mechanism in terms of the design and/or appearance of the link from the outside. The actuating member 17 passes through opening 11 to form a protruding push button on the outer surface of the first element and/or of the link. A user can easily operate the push button with a finger, for example.

As illustrated in FIGS. 2-6, the body 1.1 of the first element 1 includes a housing 15, more precisely a first housing, in which the bolt 14 and the insert 21 of the second element are housed to effect a locking engagement.

The housing 15 is formed at least in part by two channels 26, 27 (FIGS. 4A, 4B), arranged perpendicular to each other, and which cross inside the body 1.1.

In one embodiment, the channels are holes, preferably blind holes. The channels are preferably machined by drilling into the body 1.1.

The first channel 26 opens to the exterior via a first opening 11, and the second channel 27 opens to the exterior via a second opening 12, the first and second openings thus being separate openings in the body 1.1 in the embodiment shown.

The first and second openings 11, 12 thus provide access to the housing 15 through the respective channel. In the embodiment shown, the channels (blind holes) form the housing 15.

The bolt 14 is housed in the first channel 26, and comprises a head 17 which projects through the first opening 11, and which comprises and/or constitutes an actuating member, enabling the bolt 14 to be actuated through the opening 11.

Inside the body 1.1, the housing 15 comprises or forms compartments whose dimensions and/or shapes are arranged to confine and guide the bolt 14 so that it can perform a linear, translational and/or axial movement along its main axis. Confinement and/or guiding is preferably defined by the first channel 26.

A return element 16, for example a spring and preferably a cylindrical compression spring, is arranged in housing 15 and more particularly in a dedicated compartment 37 at the inner end of channel 26, opposite opening 11, extending the housing of bolt 14, so as to urge the bolt in the axial direction and/or towards opening 11.

As will be understood below, return element 16 is arranged to urge the bolt into the locked position and/or to prevent accidental unlocking. In the embodiment shown, housing 15 comprises and/or is formed by different compartments, namely channels 26, 27 and recess 37, intended to accommodate and/or stabilise different parts, namely, respectively, the bolt, insert 21 and spring 16.

Lock 14 is shown separately in FIG. 2. Towards a first end, shown on the left in FIG. 2, the bolt includes a head 17, which functions as and/or forms the actuating member. The other end (the second) includes housing 34 and/or at least one bearing surface (FIG. 5) to accommodate an end of the spring, which here constitutes the return element. Housing 34 may be a blind hole, for example drilled axially in the lock; this housing allows the spring to be supported and/or stabilised and/or to receive the end of the compression spring.

At or near the second end, the bolt also comprises and/or forms a cooperation zone 31 and/or the locking portion of the lock. In the embodiment shown, the cooperation zone comprises a cylindrical portion whose diameter is adjusted so as to allow locking with the cooperating structure 24, the latter comprising a circular opening arranged on insert 21 of the second element 2 of the link, the opening here being oriented transversely with respect to the axial direction of bolt 14 so as to receive it.

Head 17 and the locking part 31 are connected by a clearance and/or linking structure or zone 33, the latter having a reduced dimension relative to that of the locking part 31. The dimension, in particular the diameter, is adjusted to allow unlocking and/or disengagement of the cooperating structure 24 along a defined clearance direction.

In the embodiment shown in FIGS. 1 to 6, head 17 forms a protruding structure and has dimensions and/or shapes to facilitate manual activation —here, a sphere. To allow guidance of the lock's movement, the latter includes a guiding zone 32, the shape of which is complementary to the shape of the first channel 26, so as to permit guidance and/or sliding of the bolt along a defined displacement within the channel 26.

In the embodiment shown, the first channel is a cylindrical bore and the guiding zone 32 is cylindrical in shape, the latter being adapted to guide the axial movement of the bolt in the channel. The cooperation zone 31, which serves primarily for locking, can also fulfil a guiding function, for example towards the inner end of channel 26.

Lock 14 further comprises a collar 36 which defines a recess 38 separating head 17 from the clearance zone 33.

In the embodiment shown in FIGS. 1 to 6, the different zones and/or parts of the piece forming the bolt are formed in a simple manner. bolt 14 can be manufactured from a cylindrical pin, which is machined so as to include defined zones of reduced diameter.

Here, the diameters of the guiding zone 32, of the collar 36 and of the locking structure 31 have the same diameter, for example that of the original pin. The clearance zone 33 and recess 38 have a reduced diameter compared with the diameter of the original pin and can be machined into the pin to form bolt 14. It should also be noted that collar 36 is not mandatory, and that there are other ways or arrangements to achieve retention of the bolt in housing 15, as described below with reference to FIG. 8.

The second element 2 of the link shown in the figures forms an open O, an open circle, or an open loop, resembling the letter Omega (Ω) or a horseshoe, whose arms form first and second ends 41, 42. At least one of these ends, notably the first end 41, but preferably both, comprises or forms an insert 21. Insert 21 is arranged to be inserted into the first element 1, preferably through said second opening 12, to place the insert in housing 15.

Insert 21 comprises one or more structures configured to allow the insert to cooperate with the bolt, more specifically to lock the insert in housing 15. The insert notably comprises an opening or passage, here a circular hole, oriented so as to allow bolt 14 to pass through when the insert is placed in housing 15. The passage forms a cooperating structure 24, arranged to cooperate with the cooperation zone 31 of the bolt to lock the insert in housing 15 when the bolt passes through the opening, in accordance with the conventional operation of a lock.

Insert 21 further comprises a second passage 23, formed here as a notch and/or a recess 23 in end 41, more particularly in the first passage 22. The second passage 23 is preferably oriented in a direction perpendicular to the direction of the lock. This passage connects or opens the first passage 22 to the outside.

In the embodiment shown, the second passage 23 creates a forked end at end 41. Instead of a second passage, the cooperating structure could alternatively be arranged as an edge, for example produced by cutting, the edge forming and/or delimiting the second cooperating structure. The second passage may be absent as an insert passage, and/or may be defined together with the first element, either by the assembly formed by the geometry and/or shape of housing 15 and the geometry and/or shape of insert 21.

The second passage 23 has a dimension and/or shape identical to or slightly larger than the dimension and/or shape of the clearance zone 33 of bolt 14. By contrast, the dimension and/or shape of passage 23 is such that it does not allow the locking structure 31 to pass, taking into account, where appropriate, the orientation of the insert when it is inserted into the second channel 27.

It should also be noted that retaining part 35, here formed by a retaining clip, is fitted onto the bolt, more precisely into recess 38, so as to be prevented from moving in the axial direction of the lock. Part 35 forms a shoulder on the lock. This shoulder projects beyond the outer surface of the bolt, in particular relative to the guiding zone 32, and forms an abutment surface 39 (FIG. 2). This abutment surface is preferably adjacent to the guiding zone 32. Since part moves with the bolt 14, it forms a travel limit stop.

To assemble the bolt 14 into housing 15, spring 16 is first placed in its dedicated compartment 37, at the bottom of the blind hole 26. It can be inserted through either the first opening 11 or the second opening 12. The bolt 14 is preferably inserted into channel 26, preferably through the first opening 11. Channel 26 forms a guiding structure for the bolt, and inserting the bolt through the second opening 12 is not possible in the embodiment shown. Next, part 35, a retaining clip or a kind of washer or ring, is placed in the recess 38 of the bolt by insertion through the second opening 12. In order to correctly position part 35 on the bolt, it is generally necessary to depress the bolt slightly into its housing, that is to press on head 17, as in the case of activation during unlocking.

Part 35 forms an end stop 39, arranged to abut an edge 29 (FIG. 4B) inside housing 15, formed here by the intersection of the first and second channels 26, 27. The retaining clip thus retains the bolt in housing 15 and/or in channel 26.

As shown in FIGS. 4A and 4B, the actuating member 17 is a push button intended to be depressed to move from the locked (or rest) position, shown in FIG. 4A, to the activated and/or unlocked position, shown in FIG. 4B.

In the locked position, insert 21 cannot exit the second opening 12, because it is retained by the bolt, the cooperation zone 31 of which engages the cooperating structure 24 provided on the insert. In the embodiment shown, cooperation zone 31 is a cylindrical part of the bolt and fills the hole and/or passage, the latter constituting or comprising cooperating structure 24.

The shapes and dimensions of these cooperating structures (or parts) produce the locking. The cooperating structure 24 of the insert is aligned with the notch and/or passage 23, but since the latter is sized more narrowly than the passage defined by cooperating structure 24, insert 21 is locked in housing 15.

When the actuating member 17 is actuated, the bolt moves along its axis, resulting in the separation of cooperation zone 31 and cooperating structure 24. These are therefore no longer aligned in the direction of movement of insert 21, which here corresponds to the axis of the second channel 27.

As a result of the activation, bolt 14 is pushed further into its housing and/or into channel 26, and the return element is compressed. This movement aligns the clearance zone 33 of the bolt with passage 23. The clearance zone 33 is sized to pass through passage 23. In this configuration, the bolt no longer blocks the movement of insert 21, which can therefore exit housing 15 in a motion guided by the second channel 27. The result of the displacement of the second element 2 relative to the first 1 is the complete separation of the two elements 1, 2, as can be seen from FIG. 2.

As illustrated in FIGS. 3 and 5, the first element 1 comprises a second housing 45, formed here by a bore substantially parallel to the second channel 27. The second housing 45 is arranged to receive a second end 42 of the second element 2. A second insert 22 is arranged to form said second end, the second insert having, in the embodiment shown, the same shape as the first insert 21.

The second housing 45 does not include a bolt here, and the insert 22 formed by the second end 42 is therefore not locked in this second housing. When the bolt 14 is in the depressed and/or unlocked position, the two inserts 21, 22, formed respectively at the two ends of the second element, can exit their respective first and second housings 15, 45, allowing the link to open.

In the embodiment shown, the second end 42 and/or the second insert 22 comprises the same shapes and/or structures as the insert 21 of the first end, such as shapes corresponding to the cooperating structure and/or the first and second passages 24, 23. In this embodiment, this is not necessary in principle, because these shapes do not fulfil any particular function. It would be possible to make the second end 42 differently and/or to omit the structures required for cooperation of the insert 21 of the first end 41 with the lock. The second insert 22 could be entirely cylindrical, for example. In the embodiment shown, the first and second inserts are made identically and/or the second insert 22 is the mirror image of the first insert 21. This facilitates the use of the link, because a user who wishes to lock the first and second elements does not need to worry about any particular orientation of the second element relative to the first element. The link can be locked either with the first or the second insert 21, 22 placed in housing 15 via channel 27.

In FIG. 2, references 50, 51 and 52 show that the body 1.1 of the first element 1 can be segmented into three successive structures. A first support structure 51 is arranged to receive and house the first end 41 (or the first insert 21) of the second element, and a second support structure 52 is arranged to receive and house the second end 42 (or the second insert 22) of the second element. The first and second support structures are connected by a connection structure 50 which, in the embodiment shown, does not differ significantly from the first and second support structures, but which could be characterised by a reduced shape and/or size.

Other variants of the invention can be directly deduced by a person skilled in the art. For example, it is possible to provide that the first channel 26 is extended to join the second housing 45, with a bolt extending into this lengthened channel and equipped with structures and/or shapes enabling locking and/or unlocking in cooperation with the second insert 22 and/or with the second end 42 of the second element. In this case, the bolt is arranged to lock and/or unlock the two inserts 21, 22 at the two ends 41, 42 of the second element simultaneously.

The link 10.1 according to a second embodiment is shown in FIGS. 7A, 7B and 7C. In the figures showing other embodiments, the same reference numbers are used to indicate a structural feature corresponding to that already described in this description. The difference between link 10.1 and link 10 shown in the preceding figures relates to the realisation of the actuating member 17′. The latter does not form a prominent and/or protruding structure, but is formed here by guiding zone 32 and/or by the free end of the latter, and/or more generally the free end of bolt 14′.

In the rest/locked position, the actuating member 17′ is substantially flush with the outer surface of the first element 11, or may even be slightly recessed into the first channel 26. In this embodiment, prominent and/or protruding structural elements are absent. More particularly, the bolt 14′ of this embodiment does not protrude beyond the opening 11 of the first channel 26.

In this embodiment, guiding zone 32, or its end, serves as the actuating member 17′ and allows the bolt 14′ to be activated.

In a preferred embodiment, particularly when the link of the invention is not a clasp, the diameter of the first opening 11 is less than 4 mm, preferably less than 2 mm, more preferably less than or equal to 1.5 mm, for example between 0.9 and 1.4 mm

Due to its dimensions, the actuating member 17′ can scarcely be operated by hand with sufficient force to effect unlocking. The actuating member 17′ is preferably arranged to be pressed with a pointed, thin and/or elongated object, such as a needle, the tip of a screwdriver or the tip of a pen.

The flush arrangement of the actuating member 17′ with the outer surface of body 1.1 of element 1 has the effect of at least partially concealing the actuating member 17′. Link 10.1 has the same external shape and/or the same external outline as another link of the same type that lacks the locking mechanism. Thus, link 10.1 can be integrated into a chain of links having an identical shape, so that the link of the invention fits perfectly into the chain and is generally not identified as a particular link by an outside observer.

In the embodiment shown in FIGS. 7A-7C, the actuating member 17′ is arranged to close off opening 11. In this embodiment, the head 17′ does not protrude from opening 11 and/or is not arranged to project beyond opening 11.

To open the link, a user and/or wearer will usually examine the links one by one and closely, and/or will orient them so as to reveal opening 11 and thus the actuating member 17′. For example, a user can identify link 10.1 by choosing a viewing angle that allows seeing opening 11 in which the actuating member 17′ is arranged.

In the embodiment shown in the FIGS. 8A and 8B, the bolt 14.3 is retained in its housing 15 by means of a retaining ring 29.1, which is fixed, for example press-fitted, glued, or welded, into a seat 11.2 arranged in the first element 1. The bolt here comprises a circular rim 39.3, constituting an end stop (travel limit stop), arranged to abut against an inner surface of the retaining ring 29.1 under the action of the force exerted by the return element 16. The seat 11.2 may be a hole and/or a bore, coaxial with the axis of the lock. The central opening 11.3 of the retaining ring 29.1 corresponds to the first opening 11 mentioned above, through which the head 17.1 of the bolt can be actuated. In this embodiment, the separate part 35, shown in FIG. 2, is not necessary. As in the case of the first embodiment, spring 16 is placed at the bottom of bore 26, preferably in a recess 37 arranged to receive an end of the spring (FIG. 5). Next, bolt 14.3 is placed in housing 15. Finally, retaining ring 29.1 is arranged, here by press-fitting into seat 11.2. Once placed in its seat 11.2, the retaining ring preferably remains integral and rigidly connected to body 1.1 of the first element 1. This embodiment illustrates an alternative way of retaining the bolt and/or preventing it from leaving its housing.

The FIG. 9 shows an embodiment in which the design of the link of the invention is adapted to constitute a clasp 10.3 for a jewelry item such as a necklace or bracelet, for example in the form of a chain 30. Unlike the link of the first and second embodiments, link 10.3 has a shape that makes it distinguishable from the other links of a chain, and/or identifies link 10.3 as the clasp of the chain. In the illustrated embodiment, clasp 10.3 comprises a first element 1.2 forming two loops with a second element 2.1 and a third element 2.2, respectively. Generally, only the second element 2.1 (or only the third element 2.2) is arranged to be separated upon activation of the actuating member 17.2. The other element, for example the third 2.2, may be formed in one piece with the first element 1.2 and/or may be permanently connected to it. The elements 2.1 and 2.2 of the clasp are each connected to a loop and/or a link 3.2 of the chain, preferably the two terminal links 3.2 of chain 30.

FIGS. 10A and 10B show the clasp 10.4 of an embodiment in which the second element 2.4 is provided with only a single insert 21.4. Element 2.4 comprises a closed loop 2.41, for example in the form of an O, a circle, an ellipse, a ring or any chain link, this loop being provided with an insert 21.4, preferably arranged on the outer surface and/or outer periphery of the closed loop.

Insert 21.4 is preferably oriented in the direction of the extension of a chain comprising the clasp 10.4, assuming that the chain is laid flat, as if the insert were facing an adjacent link.

The first element 1.4 comprises the first and second openings 11, 12.4, but in this case a third opening may be absent, because a second insert and/or a second end of the second element 2.4 is also absent. The second opening 12.4 is oriented in the direction of extension of the chain, so as to face the insert 21.4.

Bolt 14 is arranged and housed in the body of the first element 1.4 as described below with respect to the other embodiments, and operates in the same manner. Accordingly, insert 21.4 comprises the cooperating structure as well as a passage or recess, allowing it, respectively, to be retained by bolt 14 and to be separated from it, as described above, depending on whether or not the actuating member 17 is activated.

It should further be noted that two structures may be distinguished in the first element 1.4: a support or main body 1.41, arranged to house the bolt and to receive insert 21.4, and a (second) closed loop 1.42 which is preferably rigidly connected to the support 1.41 and may but need not be formed in one piece with the latter, as described with respect to the clasp shown in FIG. 9. The assembly formed by the first and second elements 1.4 and 2.4, including loops 1.42 and 2.41, preferably constitutes the clasp of this embodiment.

More generally, the embodiment shown in FIGS. 10A and 10B illustrates the operation of the concept of the invention with a single insert 21.4 and/or a single protruding end arranged to be connected to the first element 1.4, the latter being provided with a (single) opening 12.4 adapted to receive such an insert. This embodiment is preferably a clasp for a piece of jewelry, for example a necklace, a bracelet, or any jewelry comprising a chain.

FIGS. 11A and 11B show a connection system 10.5 comprising first and second elements 1.5 and 2.5 that can be rigidly connected to each other, in accordance with the first and second elements of the links and clasps of the previous embodiments. In system 10.5, the second element 2.5 is a connecting device adapted, for example, to be attached to a bracelet strand by means of a spring bar (not shown). To this end, the second element comprises two ears or lateral tabs 2.52, each comprising a hole 2.53, the two holes being arranged opposite one another to receive the ends of the spring bar and to hold it securely. The two lateral tabs 2.52 are arranged on and connected by a transverse bar 2.11.

The spring bar can be arranged at the end of a bracelet strand so as to allow the bracelet strand to be connected to the second element 2.5.

A flat and/or non-cylindrical insert 21.5 is arranged on the transverse bar 2.5, on the side opposite that bearing the lateral tabs 2.52.

The first element 1.5 comprises a body 1.51 in which an opening 12.5 is formed, giving access to the housing 15.5 and being arranged to receive the second element 2.5, and more precisely the insert 21.5 of the latter. The first element 1.5 further houses a bolt 14.5 having the same characteristics as described above, notably comprising successive zones shaped to fulfil different functions, such as an actuating member 17.5, a sliding and/or guiding zone 32.5, an arrangement 35, 36.5 and 38.5 forming an end stop to retain the bolt in its housing, a clearance zone 33.5 and a cooperation and/or locking zone 31.5. The spring 16 is also housed in the housing 15.5 arranged in the first element 1.5, as described above.

The locking and unlocking of the first and second elements 1.5 and 2.5 by operation of the actuating member 17.5 functions as described above with respect to the other embodiments.

The first element 1.5 can be fixed to a watch case or to a piece of jewelry, so as to be part of a clasp, for example, or of any connection system for a watch and/or jewelry component.

As one can see, the invention is advantageous in that it provides a link of a chain that can be conveniently opened and closed in a secure manner. The link or clasp may be realized with as few as five (5) pieces, as disclosed herein. In some embodiments. Of course, the link or clasp may comprise more pieces, for example, for ornamental purposes. Thanks to the few pieces and the overall configuration, the link or clasp can be assembled rapidly and can be miniaturized. The actuation member can be concealed as illustrated in FIGS. 7A-8B, while still being activatable by a user from the outside.

The person skilled in the art will encounter no particular difficulty in adapting the contents of the present disclosure to their own needs and in implementing a link, in particular for a jewelry or watchmaking item, without departing from the scope of the present invention. It will be noted, for example, that adapting the present teaching to the construction of another type of link for a bracelet, a necklace, a chain or any other piece of jewelry that does not necessarily include a chain will pose no particular difficulty for the person skilled in the art.

In one embodiment, the first and second elements may, for example, be connected by a hinge, instead of being completely separable. One end of the second element, preferably the second end 42, can be connected to the first element 1, for example to the second support structure 52 (FIG. 2), by a hinge. In this case, the first element 1 is preferably arranged to allow pivoting movement of the first end 41 when the bolt is in the unlocked position. It would be possible, for example, to enlarge the second opening 12 and/or the second channel 27 to allow such pivoting movement.

Claims

1. Link and/or clasp of a chain, adapted for a piece of jewelry, comprising first and second elements capable of being secured together so as to form the said link and/or clasp and arranged to conduct a movement relative to one another in order to allow separation, in the case of a link, from another link and/or the addition of the link to another link of the chain, or, in the case of a clasp, the opening of the clasp,

the said first element comprising: a housing and first and second openings giving access to said housing; a bolt arranged in said housing and actuatable by an actuating member, the actuating member being arranged to allow activation of the bolt by and/or through said first opening;

the said second element comprising: an insert, arranged to be insertable into said housing through said second opening, wherein the said insert comprises a cooperating structure and the said bolt comprises a cooperation zone, said cooperating structure and said cooperation zone being arranged to be able to pass, upon actuation of said bolt, from a locked position, in which the said movement is prevented, to an unlocked position, in which the said movement is possible.

2. The link and/or clasp of to claim 1, wherein said link and/or clasp comprises or forms a loop comprising a perimeter and wherein each of said first and second elements provides a part of said perimeter.

3. The link and/or clasp of to claim 1, wherein said first element and said second element form together a closed loop when they are secured together and/or when said link and/or clasp are in said locked position.

4. The link and/or clasp of claim 1, wherein, in a position of use, said first element and said second element surround a space, wherein said surrounded space is defined partly by said first element and partly by said second element.

5. The link and/or clasp of claim 1, wherein said insert is provided and/or forms a first end of the second element, and wherein the second element comprises a second end, separated from said first end, wherein said first and second ends are rigidly connected or in one piece.

6. The link and/or clasp of claim 1, wherein said insert is a first insert and wherein the second element comprises a second insert provided for being able to be inserted into the first element through a third opening.

7. The link and/or clasp of claim 1, wherein said bolt comprises a substantially cylindrical shape and comprises two or more cylindrical sections having different diameters.

8. The link and/or clasp of claim 1, wherein the first element comprises a body and wherein said housing is provided in said body, and wherein said body is made in one piece.

9. The link and/or clasp of claim 1, wherein the first element has a body, which forms part of the perimeter of a loop formed by said first and second elements.

10. The link and/or clasp of claim 1, further comprising a return element (16) arranged in said housing, in an extension of said housing, in such a manner so as to urge said bolt into the locked position.

11. The link and/or clasp of claim 1, wherein said cooperating structure:

is shaped, optionally together with one or more inner walls of said housing (15), so as to delimit a space arranged to receive said bolt and to form a contact surface for cooperating with the bolt, in particular with the cooperation zone of the bolt, so as to retain the insert in the housing in the locked position, and/or,

to form, optionally together with one or more walls of the housing, a passage and/or a recess, arranged to allow the cooperating structure to move relative to the bolt and to separate the insert from the bolt in the unlocked position.

12. The link and/or clasp of claim 1, comprising a separate retaining part, arranged to retain the bolt in said housing.

13. The link and/or clasp according to claim 12, in which said separate retaining part forms an end stop, arranged to limit the axial movement of the bolt, said separate retaining part being arranged:

on the bolt, so as to move with the bolt and to be able to abut against a wall of the housing so as to prevent the bolt from exiting the housing, or,

on the first element, for example in or on the housing, so as to remain stationary in the housing and/or to form a stop inside the housing, the bolt comprising an end stop intended to abut against the retaining part in order to prevent the bolt from exiting the housing.

14. The link and/or clasp of claim 1, wherein said second element comprises a curved and/or folded longitudinal and/or oblong part, for example having a U-shape, a Ω, a horseshoe, an open O and/or an open circle, and wherein said insert is arranged on and/or formed by a free end or zone of said longitudinal part.

15. The link and/or clasp of claim 1, wherein said second element is a rigid element, for example made from metal, from a composite material and/or from a material comprising carbon fiber and/or forged carbon.

16. A clasp for a chain, adapted for a piece of jewelry, comprising first and second elements capable of being secured together so as to form the said clasp and arranged to conduct a movement relative to one another in order to allow the opening of the clasp,

the said first element comprising: a housing and first and second openings giving access to said housing; a bolt arranged in said housing and actuatable by an actuating member, the actuating member being arranged to allow activation of the bolt by and/or through said first opening;

the said second element comprising: an insert, arranged to be insertable into said housing through said second opening,

wherein the said insert comprises a cooperating structure and the said bolt comprises a cooperation zone, said cooperating structure and said cooperation zone being arranged to be able to pass, upon actuation of said bolt, from a locked position, in which the said movement is prevented, to an unlocked position, in which the said movement is possible,

wherein the clasp comprises a separate piece that provides a retaining part, arranged to form an end stop, to retain the bolt in said housing, and to limit the axial movement of the bolt, said retaining part being arranged: on the bolt, so as to provide a travel limit stop that moves with the bolt to be able to abut against a wall of the housing and thereby prevent the bolt from exiting the housing, or, on the first element, for example in or on the housing, so as to remain stationary in the housing and/or to form a stop inside the housing, the bolt comprising a travel limit stop intended to abut against the retaining part in order to prevent the bolt from exiting the housing.

17. The clasp of claim 16, wherein the retaining part placed on the bolt is selected from a retaining clip, a washer and a ring.

18. Link of a chain and/or a clasp for a chain, adapted for a piece of jewelry, comprising first and second elements capable of being secured together so as to form the said link and/or clasp and arranged to conduct a movement relative to one another in order to allow separation, in the case of a link, from another link and/or the addition of the link to another link of the chain, or, in the case of a clasp, the opening of the clasp,

the said first element comprising: a housing and first and second openings giving access to said housing; a bolt arranged in said housing and actuatable by an actuating member, the actuating member being arranged to allow activation of the bolt by and/or through said first opening;

the said second element comprising: an insert, arranged to be insertable into said housing through said second opening, wherein the said insert comprises a cooperating structure and the said bolt comprises a cooperation zone, said cooperating structure and said cooperation zone being arranged to be able to pass, upon actuation of said bolt, from a locked position, in which the said movement is prevented, to an unlocked position, in which the said movement is possible, wherein said insert notably comprises a first passage, oriented so as to allow bolt to pass through when the insert is placed in the housing, and a second passage, said second passage being oriented perpendicularly to the bolt.

19. The link and/or clasp of claim 18, wherein said second passage provides an opening in said first passage.

20. The link and/or clasp of claim 18, wherein the second passage provides a forked end of the insert.