Abstract: A terminal fitting (T) is secured to an end portion of a wire (W) and then is inserted into a cavity (11) of a housing. The terminal fitting (T) has a tubular main portion (20) for receiving a mating terminal. A wire connection portion (40) is behind the main portion (20) and can be connected with the end portion of the wire (W). At least one rounded portion (33) is provided near a front end of the main portion (20) with respect to an inserting direction (ID) of the terminal fitting (T) into the cavity (11) and at a base side of the wiring connecting portion (40).

Abstract: A receptacle box installer includes an L-shaped element with a first arm and a second arm, a block attached to an inside surface of the first arm of the L-shaped element, and a gap between a side of the block closest to the second arm of the L-shaped element and the second arm of the L-shaped element. A user then inserts the second arm of the L-shaped element into a receptacle box until the gap is filled with an outside wall of the receptacle box. A surface of the block opposite the connection with the first arm of the L-shaped element is contacted with a front surface of a framing member. The receptacle box is then contacted with the framing member. A user then attaches the receptacle box to the framing member using standard attachment means. Once the receptacle box is installed on the framing member, the receptacle box installer is removed from the receptacle box.

Abstract: Electrical contact comprising a contact element, which has a connection portion, which serves for the electrical conducting connection to an electrical conductor, but a contact holding portion connected integrally to the connection portion, for contacting a counter contact, and a support element, which encloses the contact holding portion at least at a portion of its length along a longitudinal axis and formed in cross-section as a hollow rectangle delimited by four walls, has along the longitudinal axis a front end and a rear end facing the connection ports.

Abstract: The present invention is an exposed-spring female terminal comprising a tubular body having two lateral walls and two vertical walls and extending in a depth direction; a connecting part being arranged with the body on a rear side in the depth direction, being provided integrally with the body and being structured to connect to an electric wire, etc.

Abstract: The invention relates to an electrical connector element comprising a base part having a socket section to receive a plug-in contact and an insertion part inserted into the socket section for the contacting of a plug-in contact introduced into the socket section.

Abstract: An electrical contact is provided. An embodiment of the electrical contact includes a bottom member, a pair of side walls and a tongue. The bottom member includes a first portion and a second potion and also defines a horizontal plane. The pair of sides walls extend away from the bottom member. The pair of side walls define an opening therebetween which is located above the second portion of the bottom member. The tongue extends at an angle with respect to the horizontal plane. A wire is insertable into the electrical contact from the first portion of the bottom member and a post or conductor is insertable into the opening. At least a portion of the tongue helps maintain at least a portion of the post at least partially within the electrical contact. The electrical contact may also include a fold and a stop member.

Abstract: An electrical female terminal is provided of two piece construction comprising an outer body and an inner body. The outer body has a forward shield portion and rearward conduction attaching portion. The inner body has a forward receptacle portion and a rearward conduction contacting portion enabling current to flow from a mating terminal to an attached electrical cable via the inner body. The receptacle portion includes resilient contact arms. The shield portion of the outer body surrounds the receptacle portion. The shield portion includes back-up spring members that enable the receptacle portion to maintain a normal force on a mating terminal even if the contact arms relax.

Abstract: A terminal fitting (T) has a rectangular tube (10) with a side plate (13R) and a receiving plate (35) that extends inwardly in a width direction from the front edge of the side plate (13R). A probe (P) can be brought into contact with this receiving plate (35). Thus, a contact area of the probe (P) along the width direction is wider than the thickness of the right side plate (13R). Thus, the probe (P) can be brought securely into contact with the rectangular tube (10) even if displaced along the width direction.

Abstract: An electrical female terminal has a female terminal body that extends along a central axis and includes a terminal receptacle and a clamping member integrally connected thereto. The terminal receptacle forms a box-shaped configuration to define a generally box-shaped cavity extending through the terminal receptacle. A spring element is disposed within the box-shaped cavity and is connected adjacent a top wall and a rearward end of the terminal receptacle and projects toward a bottom wall and a forward end of the terminal receptacle. The top wall includes a cutout window that is positioned offset from the central axis. An electrical female terminal connector includes a female connector housing and the female terminal.

Abstract: The present invention relates to female electrical terminals comprising a connection section for connection to a conducting wire and an opposing contact section for mating with a complementary male terminal. A flexible contact element is disposed within at least a portion of the contact section for urging a complementary male terminal into engagement with a contact section wall. The flexible contact element is protected from damage by prohibiting access to its leading edge. The present invention also relates to electrical connectors comprising female electrical terminals.

Abstract: A female contact comprises a tube-shaped socket having a male-contact accommodation space, and a flat spring held in the socket so as to apply elastic force to a male contact. A notch is formed at a male-contact inlet of the socket. A hook formed at one end of the flat spring is engaged with the notch, so that the flat spring is latched at the male-contact inlet.

Abstract: A female terminal fitting has a rectangular tubular body (12) with opposed first and second walls (16, 17) and an insertion opening (15) for receiving a tab (11). An elastic contact piece (21) is inside the body (12) and extends obliquely from a support (27) on the second wall (17) of the body (12) towards both the first wall (16) and the insertion opening (15). The elastic contact piece (21) then bends back towards the second wall (17) to define an apex (23). A projection (30) projects toward the first wall (16) from a location on the elastic contact piece (21) between the support (27) and the apex (23). The elastic contact piece (21) deforms flexibly about the support (27) when the tab (11) is inserted into the body (12), thus sandwiching the tab (11) between a contact (31) of the projection (30) and the first wall (16).

Abstract: A terminal fitting has a rectangular tube (10) formed with a locking hole (19). A resilient contact piece (25) is in the rectangular tube (10) for contacting a tab of a mating terminal fitting. Displacement restricting portions (15F, 15R, 18F, 18R) are provided in the rectangular tube (10) at positions before and behind the locking hole (19) for contacting lateral edges of the resilient contact piece (25) and restricting displacement of a resilient contact piece (25) towards a tab entrance space (32). Thus, external matter that may intrude through the locking hole (19) can not cause a damaging deformation of the resilient contact piece (25).

Abstract: In a wire press-clamping method of press-clamping a conductor of a wire to a conductor press-clamping portion of a press-clamping terminal in electrically-connected relation thereto, there is used the press-clamping terminal having conductor press-fastening piece portions for press-fastening the conductor, and a press-clamping member is interposed between the conductor press-clamping portion and the conductor, and is press-fastened by the conductor press-fastening piece portions.

Abstract: A stabilizer (30) of a terminal fitting (20) is divided into a front stabilizer (31A) and a rear stabilizer (31B) and defining a small clearance therebetween. Thus, the smaller holes (32A, 32B) are formed by the divided stabilizer (30), and external matter is less likely to intrude.

Abstract: A terminal fitting (T) has a tube (10) formed by at least one plate (12). A locking hole (19) is formed in the plate (12) and is engageable by a lock (52) of a connector housing (50). The plate (12) is deformed into the tube (10) adjacent the locking hole (19) to form a retaining portion (22) that enlarges an area of engagement with the lock (52) for holding the terminal fitting (T) more securely in the connector housing (50).

Abstract: The invention concerns an electrical terminal element with a crimp section and a socket section which forms a receiving chamber for a plug and which has a substantially rectangular cross-section, wherein in each case a locking projection is provided in the region of an insertion opening for the plug on opposed first side walls of the socket section. The invention further concerns a terminal element housing with at least one receiving chamber for receiving an electrical terminal element of this kind.

Abstract: A female terminal fitting (12) has tube (19) for receiving a male terminal fitting (10). A main spring (27) is cantilevered forwardly from the tube (19) and an auxiliary spring (30) is cantilevered forwardly at the outer side of the main spring piece (27). Stoppers (32) bulge out from the opposite sides of the auxiliary spring (30) for preventing the auxiliary spring (30) from being displaced up when the free end of the auxiliary spring (30) is thrust up from the outer side. Receiving portions (33) are left in the tube (19) during the forming of the auxiliary spring (30) and contact the stoppers (32). Thus, even if an external matter strikes against the auxiliary spring (30), the auxiliary spring (30) will not deform excessively in thrust-up direction.

Abstract: A terminal 20 for use in connecting a battery cable 9 to a rectangular blade 4 on a battery 2 includes a terminal body 22 and a spring member or multiple contact band 70. The spring member 70 is fabricated from a material that is more elastic than the terminal body 22 to reduce mating force, but still generate sufficient normal force to provide a good connection to the rectangular blade 4. The multiple contact spring band 70 has a plurality of spring beams in the form of twisted louvered spring beams 78 or curved spring beams 80. The spring member 70 is positioned within a receptacle section 30 of the terminal body 22 that includes two parallel walls 32, 46. The terminal body 22 also includes a wire termination section for attaching the terminal 20 to a battery cable 8. Inline and right angle versions of the terminals employ similar spring members 70.

Abstract: A stabilizer (30) is divided into a front stabilizer (31A) and a rear stabilizer (31B) with a small clearance therebetween. The front and rear stabilizers (31A, 31B) are formed from a left side plate (25) and a bottom plate (25) of a main portion (21) by cutting and bending while leaving holes (32A, 32B). The side hole (32A) is relatively larger and exposes a free end (40A) of a resilient contact (40) to the outside. Thus, a rear inner plate (36) is arranged at an inner side of the side hole (32A) to close the side hole (32A). The plastic deformation of a side of the resilient contact (40) towards the free end (40A) is prevented by preventing the intrusion of a tab (51) of a male terminal fitting (50) or other external matters through the side hole (32A).

Abstract: A female terminal fitting (10) is integrally formed by applying bending or the like to a metallic plate and provided with a main portion (20), a wire barrel (40) and an insulation barrel (50) in this order from front side to rear side. A cantilever-shaped resilient contact piece (70) that can be resiliently brought into contact with a male terminal fitting is resiliently deformably provided in the main portion (20). In a development obtained upon stamping the metallic plate out, the resilient contact piece (70) extends backward from the rear end edge of a ceiling wall (24) of the main portion (20) as a base end. The leading end of the resilient contact piece (70) is let to escape by an escaping recess (92) of a carrier (91).

Abstract: The invention relates to an electrical contact terminal which is obtained by cutting and folding a small electrically-conductive metal plate (13), consisting of a rear part (5) which can be used to connect an electric wire (1) and a front part (3) comprising a first folded blade which forms a contact blade (11, 11?) with a complementary contact blade, said contact blade (11, 11?) comprising at least one formed part (12, 12?) which is disposed in a fold area of the aforementioned contact blade.

Abstract: The invention relates to a female electrical contact terminal obtained from a single plate of electrically conductive metal including a rear part making possible a crimped connection with an electrical wire, a front part including a cage 4a consisting of a bottom, a top, two sides, at least one strip ensuring a contact with a complementary male contact terminal, a transition part linking the front part with the rear part, an extension leg at least traversing the transition zone.

Abstract: An electrical terminal including a body having a contact gripping element where the contact gripping element is resiliently biased or disposed in a channel. The contact gripping element is configured to exert a contact gripping force on an electrical conductor. Preferably, the body has a seam transverse to the contact gripping element. More preferably the seam can widen upon insertion of the electrical conductor. Most preferably the seam can reduce the radial force upon the contact gripping element as a way to relax stress on the contact gripping element.

Abstract: In a wire press-clamping method of press-clamping a conductor of a wire to a conductor press-clamping portion of a press-clamping terminal in electrically-connected relation thereto, there is used the press-clamping terminal having conductor press-fastening piece portions for press-fastening the conductor, and a press-clamping member is interposed between the conductor press-clamping portion and the conductor, and is press-fastened by the conductor press-fastening piece portions.

Abstract: A female terminal fitting (10) has a box-shaped main portion (11) with an open front end. A resilient contact piece (17) is formed in the main portion (11) for resiliently contacting a mating male tab (30). A protection wall (22) extends continuously from a bottom wall (11C) before a resilient contact piece (17) while leaving a clearance for entry of the male tab (30). Catches (23) are provided at the opposite side edges of the protection wall (22) and engage with catchable portions (24) at the side edges of the front end of the main portion (11) for resisting opening forces on the main portion (11).

Abstract: The connecting box comprises contact elements which allow automatic contacting and assembling of a solar panel with the connecting box. The solar panel comprises fixed contacts suitable for automatic contacting with the contact elements of the connecting box. The contact elements of the connecting box comprise tapered receiving regions allowing automatic insertion of the fixed contacts of the solar panel into a contact region of the contact elements. Inexpensive production is possible as a result of automatic assembling of the panels with the connecting boxes.

Abstract: A female terminal fitting (20) has an approximately tubular connection portion (22) with an open front end for receiving a tab (14) of a male terminal fitting (10). Concavities (30) extend longitudinally in the connection portion (22) at positions opposed to side surfaces of the tab (14). The concavities (30) enable the outside width (W) of the connection portion (22) to be small while securing a large clearance (C) outward from the side surfaces of the tab (14). The concavities (30) do not significantly decrease the strength of the entire connection portion (22). Additionally, the large clearance (C) avoids the need for highly accurate manufacturing.

Abstract: A terminal fitting (A) has a receiving portion (17) with a contact surface (18) for contacting a male tab (T). The contact surface (18) is widest at the front end and substantially narrowed toward the back. A rate at which a contact area of the male tab (T) and the contact surface (18) increases in the insertion process of the male tab (T) is smaller as compared to a substantially rectangular contact surface having a constant width. The terminal fitting (A) provides good operation feeling upon manually connecting the male tab (T) with the terminal fitting (A).

Abstract: The invention relates to a one-piece female electrical contact (1) which is cut and folded and which comprises, longitudinally, a rear area for connecting to an electrical conductor, a protective cage, which consists of a floor (4), two lateral walls (5, 6) and at least one ceiling element, and, on the front, a termination which is in contact with a complementary male contact. Said contact termination consists of at least one elastic contact blade (8, 9) comprising a blade which is connected to the rear of at least one ceiling element (22) and which extends towards the rear before folding.

Abstract: A female terminal fitting (20) has a main portion (21) that can be inserted into a cavity. An engaging portion (50) for engaging a lock (17) in the cavity is folded back from the front of the main portion (21). The fold (55) is rounded and contacts the lock (17) when the terminal fitting (20) is inserted into a cavity. Thus, resistance to insertion is low. The engaging portion (50) is distanced from an opposed surface (25) of the main portion (21) by an embossment (51). Thus, a large area of engagement with the lock (17) exists. A slanted surface (53) is formed at a corner of a locking surface (52) closer to the ceiling plate (25). Thus, the leading end of the lock (17) intrudes at the inner side of the slanted surface (53) to prevent the lock (17) from escaping.

Abstract: A female terminal for receiving a flat male terminal with a terminal tab (5), having a rectangular cross-section and a predetermined width (B) and thickness (D). The female terminal includes a contact element (1, 101) having two elastic contact tabs (3, 103) approaching each other along a longitudinal axis (2, 102), the contact tabs opposing contact zones (4, 104) for contacting the terminal tab (5); a hollow, rectangular support element (16, 116) defined by four walls (19, 20, 21, 22; 119, 120, 121, 122), enclosing the contact element (1, 101) and in which the elastic contact tabs (3, 103) are accommodated; and a device (13, 113) for electrically connecting a conductor. A first pair of opposing walls (19, 21; 119, 121) cover the contact tabs (3, 103) and a second pair of opposing walls (20, 22; 120, 122) have an elastic locking tab (26, 126) connected thereto.

Abstract: A female terminal including a connecting portion having a resilient strip portion for constituting a contact with a male terminal and connected to the male terminal, and a tubular portion for supporting the connecting portion continuous to the connecting portion or incorporating the resilient strip portion of the connecting portion and formed by bending one sheet of a formed conductive metal plate in which an edge portion of a portion of forming the tubular portion of the metal plate is disposed on one corner portion side of the tubular portion and a projection portion projected to a side opposed to the edge portion is formed at a face having the edge portion on a side of a corner portion opposed to a corner portion on a side at which the edge portion is disposed and at least a portion of the edge portion and the projection portion are respectively constituted to overlap the corresponding corner portions.

Abstract: A terminal fitting (10) has a sidewall (14) and a stabilizer (30) is provided at the sidewall (14) for interfering with the entrance of a cavity (42) when the terminal fitting (10) upside down. The terminal fitting (10) has a posture-holding portion (35) at a sidewall (15) facing the stabilizer (30). The posture holding portion (35) contacts the inner wall of the cavity (42) if the terminal fitting (10) is mounted in a wrong posture. Thus, the terminal fitting (10) will not incline in the cavity (42). Accordingly a sufficient amount of interference of the stabilizer (30) with the edge is ensured, and erroneous insertion of the terminal fitting (10) is prevented.

Abstract: In a connector terminal into which a cooperating male contact terminal can be smoothly inserted and a movable contact strip can be prevented from being buckled while a desired contact pressure can be attained, a connecting portion 11 is formed into a substantially box shape by folding a bottom plate 13, side plates 14, 15 (14 is not shown) continuously extending from respective sides of the bottom plate and a top plate 16 continuously extending from one of the side plates. A movable contact strip 17 is formed by folding back the top plate 16 around a gently curved portion 17a into a resilient spring having an inverted triangular shape including a contact portion 17b near an inwardly bent middle portion of the movable contact strip 17. A hole 17c is formed at an end portion of the movable contact strip 17 into which an engagement tip 16b formed by folding a part of the top plate 16 inwardly is inserted.

Abstract: A connector includes sheet metal contacts (40, 42) with termination ends (60, 62) for terminating to wires and with mating ends (70, 72) for mating to other contact devices such as circuit board pads. Each terminating end includes a wide groove part (90) with a groove bottom (94) that receives the wire insulation and with a pair of wide groove part wings (96, 98) that are crimped around the insulation. Each termination end also includes a narrow groove part (100) for receiving a bared conductor of the wire, the narrow groove part having a bottom (104) that is offset from the wide groove part bottom (94), and the narrow groove part having a pair of narrow groove part wings (106, 108) that are crimped around the wire conductor.

Abstract: A junction terminal is accommodated in a connector housing to connect a pin terminal fitted on a case of an electric instrument with a receptacle terminal of a wiring harness connector. The junction terminal includes a female electrical contact portion to electrically connect with the pin terminal of the electric instrument, a male electrical contact portion to electrically connect with the receptacle terminal of the wiring harness connector, and a bridging portion to connect the female electrical contact portion with the male electrical contact portion. The male electrical contact portion is constructed so as to be correctly positioned by a positioning member attached to the connector housing. The male electrical contact portion is arranged such that a first longitudinal line passing an intermediate point of the male electrical contact portion aligns with a second longitudinal line passing an intermediate point of the female electrical contact portion.

Abstract: An electrical contact includes a body having a first wall and a second wall opposed to the first wall. A rigid lance is integrally formed with the first wall and projects away from the second wall, and a deflectable biasing beam is integrally formed with the second wall and extends away from the first wall in a direction opposite to the lance.

Abstract: The plug contact element for the at least partial pushing through an opening, in particular a round opening, in an elastic material along a push through direction of the plug contact element comprises a housing part having at least two wall regions which are substantially planar and inclined with respect to one another at least at a front side of the housing part and which are connected to one another via an arched or bent connection region, with the housing part having at least one indentation which opens to a front side of the housing part which lies in the push through direction and of which the indentation edge at least partly forms a front-side edge of the arched or bent connection region, with the indentation edge having an apex or a tangent which is orthogonal to the push through direction, the apex or tangent being provided only at the boundary between the connection region and one of the bordering wall regions or at one of the bordering wall regions.

Abstract: The objective is to provide a terminal that can be used in waterproof electric connectors without damaging the sealing member thereof and can reliably prevent the body and the spring from being deformed through reducing the load on the body and enhancing the strength of the body.

Abstract: In a connector including a housing and a contact held in the housing for being brought into contact with a connection object, the contact includes a contacting portion surrounded by a wall portion to which a locking portion connected. The housing has a displaceable housing lance. The wall portion has first and second side walls faced to each other with a space left therebetween. The locking portion extends from the first wide wall towards the second side wall and has an extending end. The second side wall has a locking/holding portion holding the extending end. Thus, the locking portion is adapted to be engaged with the housing lance.

Abstract: A one piece blank including a configurable and combination sleeve and spring cage, defining a first female connector, and which is interengageable with a male connector having an extending male terminal pin insertable within an opposing open end of the female connector, such that both a greater area of electrical contact and increased normal holding forces are established therebetween. The female terminal further includes a plurality of interiorly extending and elongated beams, accessible through said open end, and which are configured in a combined angled and torsional manner in order to achieve a three dimensional and substantially hourglass shaped configuration.

Abstract: Two resilient contact pieces (20A, 20B) have base ends (21A, 21B) coupled to each other and folded one over the other, such that the base ends (21A, 21B) are substantially in close contact. A pressing portion (24) presses the two base ends (21A, 21B) from the outside and prevents the base ends (21A, 21B) from opening. Thus, the two resilient contact pieces (20A, 20B) are held one over the other in proper postures.

Abstract: A microelectromechanical system (MEMS) based sensor comprises: a substrate defining a plane; a first conductive material layer having a first stress, a first portion of the first conductive material layer being connected to the substrate and extending in a substantially parallel direction to the plane defined by the substrate and a second portion being disconnected from the substrate and extending in a substantially non-parallel direction to the plane defined by the substrate; and a sensor material layer formed over at least the second portion of the first conductive material layer, the sensor material layer having a second stress that is less than the first stress of the first conductive material layer. The stresses form a stress gradient that bends the second portion of the first conductive material layer and the sensor material layer formed over the second portion of the first conductive material layer away from the substrate.

Abstract: The present invention relates to a contacting part for an electrical connector, consisting of a male contacting portion and of a female contacting portion, the female contacting portion consisting of a body- having a longitudinal axis of symmetry and an and of which is provided with a housing axially positioned in said body and compatible with the shape and the dimensions of said male contact and characterized in that an external surface of the body distant from this end is in electrical contact with an annular crown extending towards the aperture of the housing through a contact clip achieving the electrical contact with the male contacting portion, the contact clip being provided with at least two resilient tabs, joined to the annular crown and arranged so as to be interposed on the path for inserting the male contacting element into the housing.

Abstract: A connector housing (10) has a terminal accommodating portion (11) with cavities (13) at upper and lower stages, and locks (21) project respectively into each cavity (13). Each lock (21) has a resiliently deformable arm (22) and a locking section (23) engageable with a female terminal fitting (30). A retainer (40) is mounted on the terminal accommodating portion (11) and has deformation restricting portions (44) that enter deformation spaces (24) for the locks (21) to prevent deformation of the locks (21). Each arm (22) has an engaging portion (29). Engaging portions (29B) at the lower stage engage a side wall (25A) of the cavity (13A) at the upper stage during the deformation of the lock (21B). Engaging portions (29A) at the upper stage engage a surrounding wall (41) of the retainer (40) during deformation of the lock (21A). Thus, the locks (21) cannot deform beyond their resiliency limit.

Abstract: A female terminal includes a resilient contact piece portion extending rearwardly from a front end edge of a bottom wall of a mating terminal-inserting portion of a tubular shape, and a free end portion of the resilient contact piece portion can slide over the bottom wall. A convex portion is formed at the free end portion of the resilient contact piece portion, and projects toward the bottom wall, and when the resilient contact piece portion is resiliently deformed upon insertion of a male terminal, the convex portion is brought into contact with the bottom wall, so that that portion of the resilient contact piece portion, extending forwardly from that portion of the convex portion contacted with the bottom wall, is spaced from the bottom wall by the convex portion.

Abstract: An electrical contact receives a corresponding contact blade. The electrical contact has contact arms for contacting the contact blade and contact pins for contacting a circuit board. A lateral frame is attached to the contact arms and has a substantially rectangular cross-section. The contact pins are connected to the contact arms by a transition piece. The transition piece is formed substantially parallel to the circuit board and has a bend that separates the contact arms from the contact pins.

Abstract: An apparatus for forming and disconnecting an electrical path includes a split tine socket that is formed of a high yield strength conducting material or metal and which includes a plurality of tines. Each tine functions as a two stage spring to supply a normal force that urges the tine toward the center of the socket. Each tine includes a first stage that has a smaller inside diameter and is therefore thicker than an adjacent second stage. The outside diameter of both stages includes a taper so that the tines are nearly cylindrical when fully mated with a pin. The second stage includes a reverse taper whereby it has a larger inside diameter proximate the first stage than at an opposite end proximate a tip, which ensures that physical, and therefore electrical, contact with the pin will occur at the tip of the tine. The first stage is in electrical contact with a socket contact portion that is typically crimped or soldered onto a wire. A plurality of sockets are typically included in a connector.

Abstract: The plug contact element for the at least partial pushing through an opening, in particular a round opening, in an elastic material along a push through direction of the plug contact element comprises a housing part having at least two wall regions which are substantially planar and inclined with respect to one another at least at a front side of the housing part and which are connected to one another via an arched or bent connection region, with the housing part having at least one indentation which opens to a front side of the housing part which lies in the push through direction and of which the indentation edge at least partly forms a front-side edge of the arched or bent connection region, with the indentation edge having an apex or a tangent which is orthogonal to the push through direction, the apex or tangent being provided only at the boundary between the connection region and one of the bordering wall regions or at one of the bordering wall regions.