Abstract: A connection terminal includes a body portion having a first end disposed on a power supply device and a second end opposite to the first end, two connection pieces, and a support portion supporting the two connection pieces and disposed at the second end of the body portion. An inner clamping space for clamping an electrode piece is formed between the two connection pieces. The support portion connects the two connection pieces and the body portion, an inner side surface of each of the two connection pieces comprises a contact surface for connecting with the electrode piece, and the contact surface extends along a first plane so that the contact surface is capable of being in surface contact with the electrode piece.

Abstract: A compact switch mechanism operating a contactor array and having a lighted display.

Abstract: In a multistage pushbutton switch device, n pushbutton switches and at least one load absorption spring are movably arranged in between a pushbutton member and a reaction force wall in the same axial line, each of the n pushbutton switches is composed of an electrical switch member and a pressing member that operates the electrical switch member, and (n?1) that is one less than n, or more pushbutton switches is arranged with an intermediate spring member, when the pushbutton member is pressed and displaced, the n electrical switch members are sequentially turned on, the load absorption spring is arranged in at least one of between the pushbutton member and the pushbutton switch that is the nearest to the pushbutton member, between pushbutton switches that are adjacent, and between the reaction force wall and the pushbutton switch that is the nearest to the reaction force wall.

Abstract: An electrical connector having a barrel or hollow cylindrical sleeve into which is inserted a cylindrical interface member adapted to accept a coil spring member on one end thereof. The interface member on its other end acts upon a cylindrical sphere or ball captured with the other end of the sleeve member. The ball is movable axially and rotationally within the sleeve to make electrical and mechanical contact with an external surface which may be either movable with respect to the ball or not perpendicular to the ball. The connector is formed to direct current to pass primarily through the sleeve and to bypass the spring.

Abstract: A compact switch mechanism operating a contactor array and having a lighted display.

Abstract: A key structure includes a casing, a restoring member and a keycap assembly. The casing has an opening. The restoring member is disposed in the casing. The keycap assembly includes a keycap and a holder. The keycap includes a pressing portion and a central shaft. The pressing portion has a bottom surface. The central shaft connects to the bottom surface. The central shaft has a hemispherical portion adjacent to the bottom surface. The holder is inserted into the casing via the opening and contacts the restoring member. The holder includes a shaft bore. The shaft bore has an arcuate socket. The central shaft passes through the shaft bore and contacts the restoring member, and the hemispherical portion is accommodated in the arcuate socket.

Abstract: The present invention provides a keyboard and a key structure thereof, including: a lower cover, a fixed plate, a plurality of keys, a flexible protection cover, and an upper cover. The fixed plate is fixedly disposed on the lower cover, the keys are fixedly disposed on the fixed plate, the hollow protrusion structure of the flexible protection cover is configured to partially cover a key pedestal of the key, and a key support shaft of the key is correspondingly configured at a position of the opening of the flexible protection cover. The upper cover is disposed on the sheet-like body of the flexible protection cover and is assembled to the lower cover, and the hollow protrusion structure is located in a recess of the upper cover.

Abstract: A switch and methods of assembling a switch. The switch may include a housing; a first terminal electrically coupled to a power source; a second terminal electrically coupled to a load; a contact having a first contact end and a second contact end, the contact being operable to be in a closed position, in which the first contact end engages the first terminal and the second contact end engages the second terminal such that the contact electrically connects the first terminal to the second terminal, and an open position, in which the contact does not electrically connect the first terminal and the second terminal; and a biasing member configured to bias the contact towards the first terminal and the second terminal, the biasing member being operable to apply a first biasing force proximate the first contact end and a second biasing force proximate the second connect end.

Abstract: An actuator for switching a switching unit includes a mechanical display having a window and a display surface visible through said window, where the display surface is positioned at a guiding projection that is subjected to a force from an elastic element.

Abstract: A keyswitch uses a combination of springs connected in serial for providing a return force to a keycap of the keyswitch. When the keycap moves toward a base of the keyswitch beyond a transition position, one of the springs stops continuously deforming. It leads to an increment of the elastic coefficient of the combination of springs and an increment of the elastic stored energy by the combination of springs. Therefore, during a pressing on the keycap, the keycap can provide a light force feedback and then a heavy force feedback to a user. Further, the keyswitch can use a switch with a lateral motion, which can reduce influence of a resilient force produced by the switch on the up and down movement of the keycap. The keyswitch also can use an elastic piece disposed beside the keycap, which can provide a tactile feedback to the user.

Abstract: A keyswitch uses a combination of springs connected in serial for providing a return force to a keycap of the keyswitch. When the keycap moves toward a base of the keyswitch beyond a transition position, one of the springs stops continuously deforming. It leads to an increment of the elastic coefficient of the combination of springs and an increment of the elastic stored energy by the combination of springs. Therefore, during a pressing on the keycap, the keycap can provide a light force feedback and then a heavy force feedback to a user. Further, the keyswitch can use a switch with a lateral motion, which can reduce influence of a resilient force produced by the switch on the up and down movement of the keycap. The keyswitch also can use an elastic piece disposed beside the keycap, which can provide a tactile feedback to the user.

Abstract: In a rotating operation body, a cam part has first cam faces for click feeling generation and second cam faces for return of the rotating operation body. The second cam faces are respectively formed continuously with the first cam faces, and an angle between each of the second cam faces and a direction in which elastic forces of engagement parts are generated is smaller than an angle of each of the first cam faces. That is, each of the second cam faces has a steeper slope than each of the first cam faces.

Abstract: A pin assembly for use in a planetary gear, including a pin defining a blind bore therein, the blind bore extending axially from an opening and terminating with an end face, and an annular rib depending inwardly from an inner surface of the blind bore adjacent the opening. A plug includes a stopper portion and a shaft extending therefrom, the stopper portion including a circular base defining an outer perimeter. The outer perimeter of the stopper portion engages the annular rib, thereby maintaining the plug in the blind bore.

Abstract: This switching device (10) comprises at least one pair of fixed contacts (18) and, for the or each pair of fixed contacts (18), a movable contact (20) that is movable between a closed position and an open position; and a contact holder (26) capable of holding in place the or each movable contact (20). The contact holder (26) is movable along a vertical direction (Z) between a first position corresponding to the closed position of the or each movable contact (20) and a second position corresponding to the open position of the or each movable contact (20). The device (10) also includes a plate (44) capable of applying a force on the movable contact holder (26) so as to move it between its first and second positions. The plate (44) is movable relative to the movable contact holder (26).

Abstract: A button structure is provided and includes a support bracket and a button. The support bracket has two opposite edges, a first concave portion, a second concave portion, and a position limiting protruding point. The first and second concave portions are respectively located at the two opposite edges, and the position limiting protruding point protrudes from the second concave portion. The button is located on the support bracket and includes a body portion, two neck portions and two stop portions. The two neck portions are located on two opposite ends of the body portion, and are respectively coupled to the first and second concave portions. The neck portion coupled to the second concave portion is positioned by the position limiting protruding point. The two stop portions are respectively connected to a side of the two neck portions facing away from the body portion.

Abstract: An inner wall for partitioning a storage chamber is disposed in a case. A switching member operating a movable contact inside the storage chamber is positioned inside a penetrating portion formed between an inner recess formed on an inner wall and a first cutout portion formed in an inner clamping piece of a lid body. The switching member is formed integrally with a flange portion, and the flange portion closes the penetrating portion. As a result, dust, dirt and moistures are unlikely to enter the storage chamber through the penetrating portion.

Abstract: An electronic device includes a button and a front panel having a button receiving hole to partly receive the button. A frame is secured to an inner side of the front panel, and includes a support portion spaced apart from the inner side of the front panel. A circuit board is secured to the support portion, and includes a switch under the button. An elastic member is located between the button and the support portion of the frame, and is used to apply a pushing force to the button.

Abstract: A linear actuating earthing switch configuration that moves movable contacts using linear motion in a single axis. The earthing switch includes a frame with a rail on a slide wall. A sliding carriage slides on the rail in a linear direction, the sliding carriage including a plurality of movable contacts. A spring surrounding a linear shaft provides a linear expansion force between the frame and the sliding carriage when the earthing switch is in an open position.

Abstract: A switching device including a breaker electrically connectable to an electrical conductor, and an at least partially electrically conductive housing to which the breaker is mounted, the housing having an outer surface. The breaker includes an electrically conductive first contact and an electrically conductive second contact, the second contact being movable and in relation to the first contact and in relation to the housing, and when the first and second contacts are in contact the breaker is in a closed position, and when the first and second contacts are separated the breaker is in an open position. The switching device is arranged to provide a current path between the breaker and the electrical conductor, and the housing houses a guiding member for operating the second contact, the guiding member being movable in relation to the housing, wherein the guiding member includes a biasing assembly.

Abstract: An electrical switching apparatus, such as a subminiature circuit breaker, includes a housing assembly, separable contacts, an operating mechanism having an actuator device and a latching assembly, a first trip device for tripping open the separable contacts in response to an overcurrent condition, and a second trip device for tripping open the separable contacts in response to an arc fault, a ground fault or a remotely transmitted signal. The subminiature circuit breaker includes a reset solenoid and a trip solenoid. The resent solenoid is coupled to the actuator device, and includes a coil operable to electrically reset the separable contacts. The trip solenoid is coupled to the latching assembly, and includes a coil operable to move the catch lever, thereby electrically tripping open the separable contacts.

Abstract: Provided is a one body-type power transfer switch, in which a disconnecting portion is integrally formed to reduce errors arisen due to accumulated assembly tolerance and simplify manufacturing processes, thereby improving operators' convenience. The one body-type power transfer switch includes a normal power terminal or an emergency power terminal, a module including a load terminal formed at a lower portion of a side of the module so as to be spaced apart from the normal power terminal or the emergency power terminal, wherein the module is formed using an injection molding method, and side walls are integrally formed to have insulating power.

Abstract: An electromechanical switch includes a contact assembly and a linkage assembly.

Abstract: A switch of a device having a longitudinal axis, and comprising a switching element parallel to the longitudinal axis of the device, a hollow body defining an interior cavity in which the switching element is movably disposed to define a switch-making position at a first longitudinal position and a switch-breaking position at a second longitudinal position, a biasing element imparting a variable longitudinal bias to the switching element to place the switching element in one of the switch-making position and the switch-breaking position until an external force imparted to the switching element exceeds the longitudinal bias causing the switching element to move to the other of the switch-making position and the switch-breaking position, and an electrically-conductive contact coupled to the switching element and defining a switch-making state when the switching element is in the switch-making position and a switch-breaking state when the switching element is in the switch-breaking position.

Abstract: At least one embodiment of the invention relates to an actuator including a mechanical display, wherein the actuator is provided for switching a switch unit, and the mechanical display includes a window and a display surface visible through the window. At least one embodiment of the invention is based on the insight that prior mechanical displays require a great deal of space within the command device, and are also prone to failure. The problem of space-saving integration is solved by a display surface formed on the spring bar mounted on the actuation part, and the display surface, together with at least a part of the spring bar, is intended to make a partial rotary motion about a rotary axis during the actuation motion. In addition to the space-saving integration, a greater displacement of the display surface is also thus achieved. At least one embodiment of the invention further relates to an electromechanical operating device having a switch unit that can be switched by such an actuator.

Abstract: The invention relates to an electrical switch (10), particularly of microswitch design, comprising at least one pair of switching contacts (42, 60), which can be moved, relative to one another, between an in-contact position and an out-of-contact position, for the purpose of making and breaking an electrical path leading via the two switching contacts (42, 60), and comprising spring means (40), which bias at least one of the two switching contacts in the direction of one of the two relative positions, the spring means (40) comprising, according to a preferred design, a helical spring (40), which is made of an electrically conductive material, is loaded substantially in the direction of its spring axis, and is located in the electrical path in series with the switching contact pair (42, 60).

Abstract: This invention provides a switch in which the switch components are separately arranged at the portion where the switch components tend to be arranged in a concentrated manner in the housing without being collectively arranged in one region in the housing to achieve miniaturization and slimming, and in which the welding avoiding performance at the contact is enhanced to extend the lifespan, and an electronic device.

Abstract: The invention relates to an electrical switch, in particular for an electric tool with an electric motor, such as for an electric drill, a hammer drill, an electric screwdriver or the like, with an actuating mechanism which can be adjusted between an initial position and a final position. The switch has a signaling device, which is operatively connected to the actuating mechanism, for generating a signal associated with the adjustment path of the actuating mechanism. Furthermore, the switch has a contact system, the actuating mechanism having a switching effect on the contact system in one position. The contact system is configured as a spring-action contact system.

Abstract: A switch has a housing, a contact mechanism having a movable contact piece disposed in the housing, an operating element that operates the movable contact piece, a spring member of the contact mechanism that operates the movable contact piece to open and close a contact, and a regulating mechanism that suppresses vibration of the spring member arranged at a position contacting the spring member.

Abstract: An electromechanical switch includes a contact assembly and a linkage assembly.

Abstract: A miniature circuit breaker has a housing formed of a housing base of insulating material and a pot-like housing cover, which is or can be positioned onto the housing base. Two elongate and flat contact arms are partially embedded in the housing base parallel with respect to one another in terms of their longitudinal direction. A fixed contact is arranged at an inner end of a first one of the contact arms. A bimetallic snap-action disk with a free end, forming or bearing a moving contact, is fitted at an inner end of the second contact arm at a fastening point. The fastening point, the moving contact and the fixed contact are in this case on an axis which is parallel to the longitudinal direction of the contact arms.

Abstract: A diaphragm-actuated pressure differential switch assembly includes a blade spring for switching an electrical circuit. The blade spring comprises a proximal end portion configured for electrically conductive attachment to an electrical terminal, a plurality of flexible tension arms extending from the proximal end portion, a pressure contact region configured to accept transmission of a physical force to bend at least one of the plurality of flexible tension arms, a distal end portion integral with the flexible tension arms, the distal end portion including an electrical contact, and a compression spring integral with the distal end portion extending generally proximally from the distal end portion, the compression spring including a first leg and a second leg. Methods of constructing and using the diaphragm-actuated pressure differential switch assembly and the blade spring are also disclosed.

Abstract: Disclosed is an electrical circuit making and breaking switch including a housing and a first electrical contact located in the housing. A block mechanism is located in the housing and includes a second electrical contact and a stopper disposed in mechanical communication with the second electrical contact. The stopper is positionable in the block mechanism, wherein a change in the position in the stopper results in a change in a contact position of the second electrical contact relative to the block mechanism. Further disclosed is a lateral block mechanism for an electrical circuit making and breaking switch. The lateral block mechanism includes two carrier assemblies and a connecting piece located between the two carrier assembles and secured thereto. An electrical contact is located at at least one of the two carrier assemblies.

Abstract: At least one embodiment of the invention relates to an actuator including a mechanical display, wherein the actuator is provided for switching a switch unit, and the mechanical display includes a window and a display surface visible through the window. At least one embodiment of the invention is based on the insight that prior mechanical displays require a great deal of space within the command device, and are also prone to failure. The problem of space-saving integration is solved by a display surface formed on the spring bar mounted on the actuation part, and the display surface, together with at least a part of the spring bar, is intended to make a partial rotary motion about a rotary axis during the actuation motion. In addition to the space-saving integration, a greater displacement of the display surface is also thus achieved. At least one embodiment of the invention further relates to an electromechanical operating device having a switch unit that can be switched by such an actuator.

Abstract: The invention relates to a contact system (2) comprising a contact bridge (15) that can be pivoted about an articulated axis (16) and is provided with a moving contact (11b, 12b) on the respective opposing ends (13, 14) thereof, each moving contact forming a contact point (K1, K2) with a fixed contact (11a, 11b) associated therewith. The articulated axis (16) is arranged in such a way that it can be displaced in the opening direction (19) of the contact points (K1, K2) along a guide (17) such that only a first contact point (K1) opens during normal operation, while both contact points (K1, K2) open in the event of an overcurrent and/or short circuit.

Abstract: Disclosed is a micro switch having a high capability of cutting off a direct current. In the micro switch including a stationary contact, a movable contact having a closed position where it contacts the stationary contact or an open position where it is separated from the stationary contact, a movable contact rod for supporting the movable contact, a plunger for pressurizing the movable contact rod upon being pressed, and a leaf spring for supplying a driving force to the movable contact rod to convert a position of the contacts being contacted or separated, a permanent magnet is installed at a position adjacent to the movable to contact and the stationary contact, so as to extend an arc generated between the movable contact and the stationary contact upon separating the movable contact from the stationary contact, whereby the arc can be fast extinguished.

Abstract: The invention relates to an electrical switch (10), particularly of microswitch design, comprising at least one pair of switching contacts (42, 60), which can be moved, relative to one another, between an in-contact position and an out-of-contact position, for the purpose of making and breaking an electrical path leading via the two switching contacts (42, 60), and comprising spring means (40), which bias at least one of the two switching contacts in the direction of one of the two relative positions, the spring means (40) comprising, according to a preferred design, a helical spring (40), which is made of an electrically conductive material, is loaded substantially in the direction of its spring axis, and is located in the electrical path in series with the switching contact pair (42, 60).

Abstract: The invention relates to an electrical switch, in particular in the form of a microswitch and/or snap-action switch, having a housing which comprises a base and a cover. The switch has a contact system, which comprises a movable switching contact and at least one stationary contact. Furthermore, the switch has a moving operating member for switching of the contact system. The cover is mounted on the base such that it can move, and the operating member is formed by the cover.

Abstract: A switching shaft unit for an electrical contact system for use in a low-voltage breaker. The switching shaft unit includes a rotary contact moveably disposed, with play, in a switching shaft or a shifting shaft segment, and having a pair of bearing pins. The switching shaft unit further includes at least one contact piece configured to make switchable contact with at least one fixed contact, and at least one pair of force springs. Each force spring is supported by an associated respective support disposed in an interior of the switching shaft or the switching shaft segment, and an associated respective bearing pin, so that, upon an opening movement of the rotary contact, a connection line defined through the associated bearing pin and the associated support of at least one of the force springs is displaced over a breakover point plane so that the rotary contact remains in an open position.

Abstract: A switch includes a base, a support terminal assembled in the base, a movable contact piece made of a belt-like electroconductive material bent into a substantial J-shape in section, a plunger vertically movably accommodated in an internal space, and a coil spring turnably supported by the plunger. The movable contact piece includes a movable contact provided in one end portion thereof An intermediate portion of the movable contact piece is turnably supported by a turning support portion of the support terminal. The internal space is formed by fitting a housing in the base. The plunger is slid while vertically moved press-contact one end portion of the coil spring against the other end edge portion of the movable contact piece such that the movable contact piece is reversed to bring the movable contact into contact with a fixed contact or to separate the movable contact from the fixed contact.

Abstract: An electrical device is disclosed for use in a wall box having a series of buttons that can either be rocker buttons or push buttons. These buttons can be supported by springboards formed integral with a support board. The springboards are for biasing the series of buttons. Much of the device is housed within a housing formed at a first end by a body and a second end by a strap coupled to the housing. The strap extends beyond the body, wherein this strap can be used to dissipate heat from the device. Inside of the housing can be at least one circuit board which has switches, which can be used to receive instructions from a plurality of buttons. In one embodiment, a plurality of light pipes are adapted so that they are housed at least partially inside of these buttons. At least one portion of the light pipe can be formed as a shaft and adapted to extend out from this housing and down to a light emitter disposed on the circuit board.

Abstract: Angled spring contacts and switches made with contactors containing angled spring contacts are disclosed. The housing for the angled spring contacts has a generally cylindrical shape. The contacts are contained within the housing with their ends extending from the housing on either side. The contacts are formed by making bullet-shaped internal contacts that are joined by a spring. The spring is mounted to the two contacts to urge the two contacts away from each other at an angle to a longitudinal axis of the housing. This angle forces contact between each contact and the housing in at least two places, thus creating redundant paths between the contacts. Switches, such as plunger switches having a normal or OFF position, and an actuated or ON position, may be made with one or more angled spring contacts. The contacts have separate surfaces for electrical conduction and for arcing.

Abstract: A mechanical limiter switch for use in a medical or surgical device has a substantially cylindrically shaped housing with a perimeter and an opening in an axial direction. The housing has a pattern along the perimeter. A spring is mounted in the opening along the axial direction, and is pre-stressed for movement in a radial direction and pre-stressed for movement in the axial direction. The spring has a radial member protruding through the pattern of the housing. A plunger is mounted in the opening along the axial direction, abutting the spring for urging the spring in the axial direction and for moving the member in the pattern along the perimeter. After a pre-determined number of activations of the plunger in the axial direction, the member will come to a terminating position and will either contact a pin to establish electrical continuity or at the terminating position break electrical continuity.

Abstract: A contractor (1) having at least two spaced-apart fixed contacts (2, 3) and an at least sectionwise electrically conductive, movable contact bridge (9) having at least two contact points (8) which are associated with the fixed contacts (2, 3). The contact bridge is adapted to be moved to a switched position by a switching force (B) and to a rest position by an opening force (V). The opening force (V) is produced by a pretensioning device (13). A particularly advantageous distribution of the opening force to the two contact points and a reliable switching operation is achieved in that one contact (2) is arranged between the other contact (3) and a point where the opening force (V) acts on the contact bridge (9).

Abstract: A mechanical limiter switch for use in a medical or surgical device has a substantially cylindrically shaped housing with a perimeter and an opening in an axial direction. The housing has a pattern along the perimeter. A spring is mounted in the opening along the axial direction, and is pre-stressed for movement in a radial direction and pre-stressed for movement in the axial direction. The spring has a radial member protruding through the pattern of the housing. A plunger is mounted in the opening along the axial direction, abutting the spring for urging the spring in the axial direction and for moving the member in the pattern along the perimeter. After a pre-determined number of activations of the plunger in the axial direction, the member will come to a terminating position and will either contact a pin to establish electrical continuity or at the terminating position break electrical continuity.

Abstract: An apparatus is provided for activating switches in a leading edge flap drive actuator. The apparatus comprises a mount plate having at least a first side, a second side, and an outer peripheral surface, an actuator arm rotationally coupled to the mount plate and rotationally moveable between at least an activate position and a deactivate position, and a spring arm coupled to the mount plate and extending away from the mount plate outer perpheral surface, the spring arm configured to supply a force that biases the actuator arm toward the deactivate position at least when the actuator arm is in the activate position.

Abstract: A push button assembly (30) includes a spring member (32) and a button (34). The spring member is secured to a computer bezel (10), and includes a rod (36), a pair of U-shaped crooks (38, 40), and a deformable arm (42) extending from one of the crooks. The deformable arm includes a connecting portion (44), a receiving portion (48) and a neck (50). The button is movably received in an aperture (16) of the bezel. The button defines a pair of grooves (54) which movably accommodate the receiving portion, so that the button can slide freely along the receiving portion. Thus the button can move freely in the aperture of the bezel.

Abstract: Electrical contact having an impervious connection, adapted to be housed in a guiding shaft open at its two ends, the contact comprising a terminal, a member and a deformable conductor. A movable contact head is connected to the terminal for connecting the member by way of the deformable conductor. A retaining element is fixed to the deformable conductor, a helical spring surrounding the deformable conductor and being supported at a first end on the contact head and at a second end on the retaining element. The contact head is biased by the helical spring working in compression. At least one stationary tubular gasket surrounds the terminal, at least partially, so as to encircle the member.

Abstract: A high output level is maintained in power supplies having multiple cells in each leg. Failed cells in any leg are bypassed to provide a current path through the respective leg. All of the unfailed cells are utilized while maintaining equal magnitude between phases and a balance phase relationship in the line-to-line output voltage. The invention may be utilized in conjunction with a peak voltage reduction circuit, and a by-pass switch.

Abstract: A press-button switching device includes a housing, stationary and movable contacts mounted in the housing, an actuating member constructed as a press-button which is guided during its switching movement in the interior of the housing and which moves the movable contacts into the respective switching positions thereof. A compression spring is arranged between the actuating member and the housing, wherein the actuating member is movable into the housing against the force of the spring. The movable contacts are each constructed as a bridge-forming contact which bridges two strip conductors in the switched-on position. During the inwardly and outwardly directed movements of the actuating member, the bridge-forming contact is moved along the strip conductors. At its end contacting the actuating member, the compression spring continues as a spring arm whose free end resiliently presses the bridge contact against the strip conductors.

Abstract: A membrane switch is actuated by pressure transmitted from a movable key member through two coaxial springs connected end-to-end. A first of the two springs is held by the key member in a partially strained state requiring an initial force to strain it further. The second spring, smaller in diameter and stiffer than the first, has a free end at which force is applied to the membrane switch. As a top of the key member is pressed, the free end of the second spring moves toward, touches, then presses the membrane switch. Force builds rapidly with displacement in the small spring until it reaches the initial force under which the first spring is retained. This initial force is made roughly equal to the force required to actuate the membrane switch. After that point, the force-displacement characteristic is that of the two-spring combination, which is less stiff than the second spring alone. Thus, long key travel is permitted while the actuation force is reached early in the displacement of the key member.