Abstract: An electrical switch comprising a casing, a fixed contact and a moving contact, and an actuator supported for movement to a first position thereby moving the moving contact into contact with the fixed contact. The actuator is movable to a second position for permitting the moving contact to move out of contact from the fixed contact. Resilient means biases the moving contact out of contact from the fixed contact. The switch includes a remover having a part provided adjacent the fixed contact and movable by the actuator moving to the second position for removing the moving contact from the fixed contact in case the moving contact stays in contact with the fixed contact.

Abstract: A circuit breaker includes a nonconductive housing, a first breaker contact within said housing, and a trigger element having a second breaker contact located within said housing. The trigger element is thermally activated to separate the first and second breaker contacts in an overcurrent condition. A nonconductive reset mechanism is located in the housing and configured for sliding actuation to prevent electrical connection between the first breaker contact and the second breaker contact after the trigger element has activated.

Abstract: A switching apparatus and electro-mechanical latching system includes an elastomeric button with independently movable electrically conducting spring plates mounted to the button. The button includes a plurality of elastomeric posts extending from an inboard surface thereof for retaining the spring plate to the button. A leadframe is disposed in the base and includes electrical tracks for communicating with a vehicle computer. Each spring plate includes a plurality of cantilever springs. When the button is depressed, the cantilever springs of the spring plates come in contact with electrical tracks to complete a circuit. The completion of the circuit causes a signal to be sent to a vehicle computer, which signals a motor to release the automotive vehicle door latch.

Abstract: There is provided a switch which is excellent in stability in electric contact between an edge part of a contact spring and a fixed contact part, ensures a stroke required for an eccentric load which is imposed on the contact spring and reduces variations in clicking feeling without shortening a life of the dome-shaped contact spring which can be clicked. A depression is formed on an inner central part of the contact spring, namely, on a movable contact part and the edge part formed on the periphery of the depression is allowed to contact the surface of the fixed contact part by a line contact, thereby ensuring electric stability of contact between the edge part and the fixed contact part. Since the movable contact part has no hole, no dust enters the switch, thereby preventing a life of the contact spring from being shortened.

Abstract: A press button switch is constructed to include a seesaw switching mechanism for switching the circuit between on/off positions, a spring-supported press button, and a push member pivoted to the spring-supported press button and controlled by the spring-supported press button to slide along two symmetrical endless sliding tracks and to switch the seesaw switching mechanism between on/off positions.

Abstract: A mounting unit (1) formed e.g. as a switch block has a downwardly open housing (2) and a base member closing the latter and serving as an actuating element (4) for locking members (9). The actuating element (4) adapted to be urged telescopically into the housing (2) upon insertion into a mounting opening (16) actuates a crank drive for repeatable adjustment of the locking members (9). By strong pressure on the mounting unit (1) one can release the locking members (9) again in simple fashion.

Abstract: A press button type safety switch is constructed to include a switching mechanism for switching the circuit between on/off positions, a spring-supported press button, a push member pivoted to the spring-supported press button and controlled by the spring-supported press button to slide along two symmetrical sliding tracks and to switch the switching mechanism between on/off positions, and a retaining structure provided between the switching mechanism and the push member and adapted to hold the press button in “on” position when the switch switched on and to release the press button when the switching mechanism tripped off upon an overcurrent.

Abstract: Multipole contact block with sudden disconnection utilisable in a position switch or a push button. The contact parts have connection lands set according to three connection planes (P1-P3) and the movable element has two contact bridges located in a frontal plane PR to co-operate with the end connection planes P1, P3, as well as one or two other contact bridges located in another frontal plane PF to co-operate with the median connection plane P2, in such a way as to enable “normally open” or “normally closed” functions of the contacts associated with the median connection plane P2.

Abstract: A switching apparatus and electromechanical latching system includes an elastomeric button with independently movable electrically conducting spring plates mounted to the button. The button includes a button cap including a relatively high durometer material and button walls including a relatively low durometer button material, such that the button walls collapse and the button cap generally maintains its shape when pressure is applied to the button cap. Each spring plate includes a plurality of cantilever springs. When the button is depressed, the cantilever springs of the spring plates come in contact with electrical tracks to complete a circuit. The completion of the circuit causes a signal to be sent to a vehicle computer, which signals a motor to release the automotive vehicle door latch.

Abstract: The present invention relates to a press-button switch which includes a control unit between a press button and a conductive switching element within a housing of the press-button switch. The control unit utilizes a push element and a hook member beneath the press button to push and pull, respectively, against a first and a second actuating element both of which are situated at different planes. Thus, the rotary body of the control unit can continuously rotate at an angle of 180 degrees in a single direction, and the eccentric hole will change its position between an upper point (H) and a lower point (L) in order to move the push-pull rod for displacing the switching element for the on-off control. Moreover, the press-button switch can be smoothly disconnected in off state for ensuring the electric safety in case of overload current.

Abstract: A method for manufacturing a push button switch cover includes providing a cover substrate that is formed on a front surface thereof with at least one key top and on a rear surface thereof with at least one pressing projection in a manner that corresponds to the key top, and applying an adhesive to the pressing projection to form an adhesive section on the pressing projection. The cover substrate is carried to a dish-shaped metal spring feed position while keeping the pressing projection facing up, and a dish-shaped metal spring is pressed onto the pressing projection corresponding thereto, while aligning a central portion of the pressing projection with an apex of the dish-shaped metal spring, whereby the dish-shaped metal spring is bonded to the pressing projection through the adhesive section.

Abstract: The desired low-priced and small-sized switch is configured so that a moving contact is provided with first and second contacts, the first contact is made of noble metal, a pair of fixed terminals are respectively provided with a fixed contact, the first and second contacts are touched to each of the fixed contacts by pressure on the moving contact by a first coil spring and the first contact of the moving contact is separated from the fixed contact earlier than the second contact by moving an operating shaft downward in an axial direction against the pressure of the first coil spring.

Abstract: In accordance with the present invention, a low-noise key switch for computer appliances is disclosed. An embodiment of the key switch includes a cap, at least one elastic element, a supporter, a switch, and a base. The cap has a top surface, a bottom surface, and a bottom edge surface. The elastic element is disposed on the bottom edge surface. The supporter supports the cap to perform a movement relative to the base. The switch, responsive to the movement of the cap, selectively turns on. When the cap moves toward the base, the elastic element approaches the base prior to the cap hits the base. Therefore, the impact of the cap toward the base is absorbed by the elastic element leading to the reduction of noise when the key switch is activated.

Abstract: A push-button actuatable electrical switch is disclosed. In one embodiment, the push-button electrical switch includes a body, a push-button lens cap extending from a first end of the body, and an electrical switch. Depression of the push-button lens cap causes the electrical switch to be activated. An electrically conductive pathway is defined through the body to a support structure whereby electrical discharges are routed to ground rather than through the lamp and electrical switch. In one embodiment, the pathway is defined by conductive carbon particles dispersed through a plastic forming parts of the switch, such as the body and the lens cap.

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: The present invention is provided with a contact switching mechanism having a movable contact member that is bent into a U shape, allowed to press and contact a fixed contact member side, and supported so as to freely tilt and move thereon, and in this mechanism, a switching operation is carried out between contacts by reversing the movable contact member in a see-saw manner, with a tilt-movement fulcrum portion of the movable contact member being always in contact with the contact portion of the common fixed contact member.

Abstract: A contact block assembly comprising a pusher having a body portion; a window formed in the body portion; a movable contact positioned within the window; a recess formed in the body portion; a first spring positioned within the recess and abutting the movable contact; and second spring positioned outside the pusher and abutting the movable contact is disclosed. A method of assembling a contact block assembly, the method comprising the steps of inserting a first spring into a recess in a pusher; inserting a movable contact within a window of the pusher and in contact with the first spring; and positioning a second spring outside the pusher and in contact with the movable contact.

Abstract: This mechanism is planned for tripping an electrical or mechanical apparatus or device, by means of which any type of actuating is performed, including the tripping and rearming means mechanism, the former being designed based on a swiveling lever (7) which is actuated by means of a hammer (6), causing the release of the locking of a trip (12) on a sliding part (16) moved toward the tripping position by means of a spring (25), whilst the rearming means are designed based on a pushbutton (26) to which a cam (29) which, when the pushbutton is pressed, pushes a skid (18) which slides along a ramp (17) of the slide (16), moving the slide along to cause the rearming by the interlocking thereon of a roller (15) pertaining to the trip (12). Said mechanism comprises a module which can be mounted on the device or apparatus on which the application thereof is feasible.

Abstract: The switching device has an actuation surface and a force transmission element disposed in a holding device. The holding device has a mechanical guide that defines a motion of the force transmission element. If pressure is exerted on the actuation surface, the force transmission element at least partially performs a rotary motion in dependence on an actuation path traveled by the actuation surface. During the process, force transmission to the switching element is deflected and guided away from the switching element as soon as the force transmission element starts to at least partially perform the rotary motion.

Abstract: An improved pushbutton switch includes an elastic element located in a body. The elastic element is made of metal and bent to form an action which has an inner diameter and two free ends to form respectively two support arms. The support arms are located in the body. When the elastic element is subject to an external pressing force, the inner diameter of the action section contracts slightly and the support arms are pressed downwards to connect two terminals of the pushbutton switch to establish electric connection to deliver signal output. When the external pressing force is released from a press element, the inherent elastic force of the elastic element pushes the press element back to its original location.

Abstract: A pushbutton for latching and momentary contact functions that is used to actuate contact elements includes a hollow cylindrical housing and a switch plunger displaceable in a lengthwise direction and non-rotatably guided in the housing. An open ring element is rotatably supported on the switch plunger. A spring and stop device for enabling a resting position of the pushbutton is provided. The housing includes an approximately heart-shaped latching guideway for the latching function disposed at an inside wall of the housing. The housing also includes a longitudinal groove for the momentary-contact function and disposed at the inside wall of the housing approximately parallel to the latching guideway and to an actuating direction. Also provided is a guide pin capable of being repositioned between the latching guideway and the longitudinal groove using a tool through an access opening defined by the housing. The guide pin projects radially outward from the open ring element.

Abstract: A control device with a snap function includes a support (10), a push-button (12) mounted so as to move in translation along an axis on the support, and a spring element (14) which is not secured to the support or to the push-button. The spring element (14) is formed of an elongated sheet made of resilient material, inserted between the push-button (12) and the support (10), and includes a pair of support zones (36) located at its ends and at least a median support zone arranged in its central portion. These support zones cooperate respectively with the head (28) of the push-button and with a raised surface (24c) of the support. In the rest position, the sheet has a bent or V-shaped cross section, which can deform to create a snap action during the travel of the push-button which tends to bend the spring element longitudinally. Such a device can be applied to control a mechanical or electrical function of a watch or another apparatus of small size.

Abstract: A push-on switch includes an insulating resin case 21 which contains a main body 24, a central fixed contact point 22 and an outer fixed contact point 23 fixed on the back wall of a front-open recess 21A; a domed movable contact 27; and an operating body 29 supported by a cover 30. The case 21 has an overhang 25, which stretches horizontally from the case in the upper part to be of a size greater than the size of main body 24. The overhang 25 is provided with terminals 26 electrically coupled with the central fixed contact point 22 and the outer fixed contact point 23, respectively. In the above-configured switch, the constituent parts are simplyformed, and can be manufactured through easy mold machining or other processing methods.

Abstract: An operation panel 30 is provided with a plurality of operation buttons 36. A string-like resistor body 41 is held in a resistor holding plate 31. The resistor body 41 has a tube-like elastic outer resistor member 42, an inner resistor member 43 loosely arranged within the outer resistor member and insulating spacers 44 arranged between the inner resistor member and the outer resistor member at predetermined intervals in the longitudinal direction of the inner resistor member so that the inner periphery of the outer resistor member 42 and outer periphery of the inner resistor member 43 are constantly separated from each other. A control unit 53 is provided to produce an operation signal.

Abstract: A magnetically coupled pushbutton switch has a coupler magnet layer that normally holds an electrically conductive magnetic armature spaced from a substrate layer. An overlay having an overlay electrical conductor formed thereon covers the pushbutton switch. The overlay electrical conductor, which electrically contacts a crown on the armature, is part of a set of electrical conductors that is normally closed. When a user provided actuation force causes the armature to break away from the coupler magnet layer, the set of electrical conductors is opened.

Abstract: A switching apparatus and electromechanical latching system includes an elastomeric button with independently movable electrically conducting spring plates mounted to the button. The button includes a button cap including a relatively high durometer material and button walls including a relatively low durometer button material, such that the button walls collapse and the button cap generally maintains its shape when pressure is applied to the button cap. Each spring plate includes a plurality of cantilever springs. When the button is depressed, the cantilever springs of the spring plates come in contact with electrical tracks to complete a circuit. The completion of the circuit causes a signal to be sent to a vehicle computer, which signals a motor to release the automotive vehicle door latch.

Abstract: Multipole contact block with sudden disconnection utilisable in a position switch or a push button.

Abstract: Operating means for the operating of a switch (2) in an electric current circuit, comprising an inner cylinder (6) connected to the switch, with a push rod (7) axially displaceable in the inner cylinder between an outer resting position and an inner operative position wherein the push rod acts on the switch to break the current circuit, and wherein a the push rod during displacement to the active position passes and is releasably locked in the active position by being arrested behind a spring member supported on the inner cylinder. The movement of the push rod in a direction towards the resting position is axially limited by an outer cylinder which is journalled about the inner cylinder and the cylinders are inter-locked in the coupled position through the aid of snap-lock means acting between and being encased between the cylinders in their interconnected position.

Abstract: A switch assembly includes both a separating wedge member, which functions to maintain two electrical contacts out of electrical communication, and a second, camming element, which can be used to squeeze the contacts together when the switch assembly is actuated. In a first embodiment, the second element is of a generally conical shape. In a second embodiment, the second element is actually constituted by two side members having ramped surfaces. The interaction of the specially shaped contacts and camming element ensures proper mating of the contact members when the switch is actuated. In one preferred form of the invention, an undulating channel is formed in a housing of the switch to pinch connecting wires and assure a positive, reliable connection with the contacts.

Abstract: An improved press switch for channeling signal transmission or output includes a body, two terminal element mounted on the body, a first elastic element located in the body, a press element disposed in the body above the first elastic element, and a face panel for covering the body at the front side thereof. When the press element subjects to an external pressing force, a second elastic element will be driven to press the first elastic element which in turn makes contact with the two terminals for establishing an electrical link to output electric characteristics desired. When the external pressing force is released from the press element, the innate elastic force of the first and second elastic element will push the press element to its original position.

Abstract: An electrical switch (10) comprises switch contacts (100, 104) having a closed condition and an open condition. The switch (10) comprises an actuator (40) movable in a first direction (110) in a first stroke to close the contacts (100, 104) and movable in the first direction in a second stroke to cause the contacts to open. A rotatable bar (70) is carried by the actuator (40). The switch (10) includes a mechanism (14, 94, 96) for rotating the bar (70) in response to movement of the actuator (40) in the first direction (110) in the first stroke, to locate the bar in a latching position to hold the contacts (100, 104) in the closed condition. The mechanism (14, 94, 96) also rotates the bar (70) in response to movement of the actuator (40) in the first direction (110) in the second stroke, to move the bar from the latching position and to cause the contacts (100, 104) to open.

Abstract: A switch assembly includes both a separating wedge member, which functions to maintain two electrical contacts out of electrical communication, and a second, camming element, which can be used to squeeze the contacts together when the switch assembly is actuated. In a first embodiment, the second element is of a generally conical shape. In a second embodiment, the second element is actually constituted by two side members having ramped surfaces. The interaction of the specially shaped contacts and camming element ensures proper mating of the contact members when the switch is actuated. In one preferred form of the invention, an undulating channel is formed in a housing of the switch to pinch connecting wires and assure a positive, reliable connection with the contacts.

Abstract: In a switch device, a support arm is retained by a conductor plate at one of its ends and by a center terminal at its other end The spring member, which made of an elastic round wire, is placed in a bent form between the conductor plate and the center terminal so as to movably support the conductor plate on the center terminal. The support arm and the spring member are retained by the conductor plate and the center terminal on arc-shaped surfaces.

Abstract: In a switch structure for a car electrical part, on the guide rail 11C of a base member 11, there are disposed the respective contact portions 12A, 14A of terminal members 12, 14 in such a manner that they have a given position relationship, and, in the first side 15A of a movable contact piece 15 disposed so as to be slidable on the guide rail 11C, there are formed two contact portions 15E which extend in parallel to the sliding direction of the movable contact piece 15 and can be contacted selectively with the two contact portions 12A and 14A. Also, in the second side 15B of the movable contact piece 15, there is formed a plate-spring-shaped portion 15G which can be engaged with uneven portions 11F formed in the second surface 11B of the base member 11 to thereby generate a click feeling.

Abstract: An improved press switch for channeling signal transmission or output includes a body, two terminal element mounted on the body, a first elastic element located in the body, a press element disposed in the body above the first elastic element, and a face panel for covering the body at the front side thereof. When the press element subjects to an external pressing force, a second elastic element will be driven to press the first elastic element which in turn makes contact with the two terminals for establishing an electrical link therebetween to output electric characteristics desired. When the external pressing force is released from the press element, the innate elastic force of the first and second elastic element will push the press element to its original position.

Abstract: A push-button switch with overload protection and automatic reset is disclosed. The switch comprises a housing, a conducting unit, and an actuating unit. The conducting unit comprises several terminals, a normal-opened first conducting leaf and a thermally deformed bimetal sheet. The bimetal sheet is of a U shape having a working end and an opening end. The working end can deform to an overload position from a normal position in response to overload occurred in the conducting unit. The actuating unit comprises a stem, a locating cantilever, a rocking lever, an enabling rest, a cantilever pusher, and a lever reseating member. By means of the above structure, even though the stem is jammed, a trip action is still exactly performed in case of overload. Moreover, the switch of this invention will automatically reset when overload occurs by virtue of the cantilever pusher.

Abstract: A switch assembly includes a housing within which is arranged a convex, over-center spring which deforms when pressure is applied to a push button. In a default position, the push button sits atop an apex of the spring, with the spring being spaced from a contact associated with a first electrical lead. One end of the spring projects from the housing and defines a second electrical lead. When pressure is applied to the push button, the spring is pushed into electrical communication with the contact, thus completing a circuit between the electrical leads. In a first embodiment, a base housing member and a separate snap-on cover is provided. In a second embodiment, the cover is attached to the base housing via a living hinge. In both the first and second embodiments, the cover assists in holding the spring in the default position.

Abstract: A key switch unit of synthetic material includes a housing and at least one key top connected to a spring section. The housing, key top and spring section are injection molded of one piece. The key top is folded back, whereby the spring section and the key top are disposed opposite one another. The key top and the spring section are elastically movable relative to the housing. By elastically pushing the key top against the spring section, the spring section is elastically displaced toward a switch element.

Abstract: A switch (10) comprises a printed circuit board (12). The printed circuit board (12) has a plurality of electrical contacts. The switch (10) further comprises a carrier (18) having an electrical conductor (102) for connecting at least two of the plurality of electrical contacts. The carrier (18) is movable relative to the printed circuit board (12). The carrier (18) further has a surface (92) having a plurality of undulations (96). The switch (10) further comprises at least one flexible plastic cantilever portion (56, 58) of a plastic member housing the carrier. The cantilever portion contacts the plurality of undulations (96). The undulations (96) and the cantilever portion (56, 58) comprise a detent mechanism to restrain the carrier (18) in a position to which the carrier (18) is moved.

Abstract: A push button type switch comprises a body and drive means. The body has a hollow interior portion that is formed as two operation spaces by a spacing portion with a through hole thereon. The two spaces each being arranged with a press element having a protrusion enclosing with an operation area and a plurality of conductive elements same ends of which have respective switching element. The driving means include a depressing element connected to the operation area and has an end passing through the through hole of the spacing portion. An elastic element covers on the pressing element and has an end connected to the spacing portion; and a rotary seat is pivotally installed on the body and has a guide groove for supporting the depressing element. One end of the rotary seat has a positioning portion connected to the switching means so that as a force applies to the pressing element.

Abstract: Wobble caused between an operation knob and a casing for housing the operation knob is suppressed as small as possible due to the heat contraction at the time of a molding process. As a result, the operation knob can be downsized and so an assembly of the operation knob and the casing can be miniaturized as compared with the conventional ones. The operation knob and the casing for guiding the movement of the operation knob are formed by composite resins by using a dichroic molding method, and then the operation knob and the casing are separated after being molded to obtain an assembly. Due to the heat contraction at the time of the molding process, a necessary guide clearance is formed between the operation knob and the casing after the assembling of the operation knob and the casing. The operation knob is allowed to move due to the guide clearance.

Abstract: A diaphragm touchbutton switch having a housing and a touchbutton slidingly guided on the housing. The housing comprises an outer wall that extends to a base surface area facing away from the touchbutton. The outer wall is bent inwards at the base surface area and passes into an inner wall angled parallel to the outer wall. The inner wall forms a connector chamber, and the touchbutton comprises at least one integrally molded guiding wall, engaged between the inner wall and the outer wall of the housing.

Abstract: A button switch wherein switching operation of contact patterns 14 printed and wired on a printed circuit board 13 is performed by pushing a contact member 12 provided on a lower face of a pushing member of the button switch is constructed in such a manner that the above mentioned contact member 12 comprises a rubber piece, electrically conductive films formed on upper and lower faces of the rubber piece, and metal wires embedded in the rubber piece so as to interconnect the electrically conductive films, the obtained contact member 12 being bonded to the pushing member.

Abstract: A pair of stationary contacts is held on the inner wall of a cylindrical case. The case is closed by a cover having a through-hole, and a bearing is fixed on the cover, such that an operation shaft extends through the bearing such as to be vertically displaceable with respect to the case. The operation shaft is biased upwards by a coil spring provided between its lower end and the bottom surface of the case. A contact piece having a plurality of movable contacts is inserted between the lower end of the operation shaft and the spring, such that it makes contact with the stationary contacts and separates therefrom along with the axial movements of the operation shaft.

Abstract: A push-button switch assembly adapted for use on a printed circuit board having a contact switch attached thereto. The switch assembly comprises a base attachable to the printed circuit board, the base having an interior cavity sized and shaped to receive the contact switch therein; an actuator disposed within the interior cavity of the base and positioned in contact with the contact switch; and a cap having an interior cavity therein, wherein a portion of the interior cavity of the cap is sized to slidably receive the base therein, and wherein the cap is in contact with the actuator.

Abstract: A push-on switch comprising an insulating resin case 21 which contains a main body 24, viz. a central fixed contact point 22 and an outer fixed contact point 23 fixed on the back wall of a front-open recess 21A; a domed movable contact 27; and an operating body 29 supported by a cover 30. The case 21 has an overhang 25, which is stretching horizontally from the case in the upper part for a size greater than the size of main body 24. The overhang 25 is provided with terminals 26 electrically coupled with the central fixed contact point 22 and the outer fixed contact point 23, respectively. In the above-configured switch, the constituent parts are simple-formed, which can be manufactured through easy mold machining or other processing methods.

Abstract: In a two-position pushbutton switch, a cushioning member is placed on at least one of first and second click springs, and the click spring is pressed via the cushioning member, thereby making a first press stroke long. A guide member is provided to guide the motion of a driving member. The driving member is slid along the guide member in the pressing direction of a key top.

Abstract: A structure of a push-button switch is disclosed which can prevent the occurrence of a poor conduction caused by the influence of dust which has entered the switch and ensuring a stable contact reliability despite of adopting a contact structure which uses round wire rods.

Abstract: A dome-shaped movable contact having a reverse function used in a push button switch is disclosed, wherein it is possible that the movable contact comes into contact with a fixed contact at position excluding the central portion thereof where dust is liable to gather, obtains high contact reliability, has good feeling in manipulation and is excellent in an intimate contact property with a sheet member covering the movable contact. The push button switch includes fixed contacts, a dome-shaped movable contact disposed above the fixed contacts, and a projection formed on the inner surface of the movable contact at a portion excluding a dome-shaped apex portion so as to be in contact with and separated from one of the fixed contacts.

Abstract: A key switch device including a guide supporting member for guiding and supporting a key top. The guide supporting member includes a first link member and a second link member, both of which are formed of wire material. A pair of arms of the second link member are positioned inwardly of a pair of arms of the first link member, and the pair of arms of the first link member are made to cross the pair of arms of the second link member in order to make the first link member and the second link member rotatable at the cross section. The invention provides a thin key switch device whose guide supporting member has higher rigidity, and which can smoothly guide and support the key top.