Abstract: A fixing device for mounting a button having a switch includes a base defining a though hole for receiving the switch, two first mounting walls adjacent to the through hole configured for clipping the button, a second mounting wall adjacent to the through hole and including a first blocking portion, an elastic piece adjacent to the through hole, and a third mounting wall extending from the elastic piece and including a second blocking portion. The first mounting walls are spaced by the through hole and located at two opposite sides of the through hole. Each first mounting wall includes a hook. The hooks are opposite to each other configured for clipping the button. The second mounting wall and the elastic piece are located at another two opposite sides of the through hole. The first blocking portion and the second blocking portion are configured for blocking the button therebetween.

Abstract: A pedestrian push button that discourages vandals and resists weather-related damage. The plunger is contained in a sleek, solid housing formed by a cup-shaped front cover that overlaps and substantially encloses a shallower, cup-shaped body, to protect the electrical components inside. The body is attachable from the inside to the traffic pole or other support surface, and the cover engages the body by means of a “twist-lock” connection that is hidden from view in the installed device. This reduces the appeal of the push button to vandals while at the same time making it easier for authorized personnel to open the housing for service and repair. The back of the body is contoured to conform to both flat and curved support surfaces, making the push button easy to mount securely regardless of the shape of the support surface.

Abstract: A switch assembly comprises first and second tact switches located on a printed circuit board (PCB) at a predetermined interval, a shuttle body having a pair of tension ribs, including a first tension rib and a second tension rib located in parallel with each other, to turn on/off the first and the second tact switches, and a knob holding shaft provided between the first and the second tension ribs, a manipulation knob connected to the knob holding shaft of the shuttle body, rotating between a position where the manipulation knob presses one of the first and the second tension ribs to operate the corresponding tact switch and a position where the manipulation knob releases the tension rib, and a spring member connected with the knob holding shaft of the shuttle body elastically pressing the manipulation knob to the releasing position.

Abstract: An ergonomically designed switch for a halogen worklight. The worklight includes a switch housing attached to the worklight head and a push-action switch mounted in the switch housing for energizing one or more halogen lamps mounted in the worklight head. An ergonomic switch is operated by pressing on a switch button, which is formed to present an ergonomically sized engagement surface to the user. The size of the engagement surface is related to the typical size of a finger pad of the human hand. Through the simple expedient of providing a substantial switch button on the actuating shaft of the switch and sizing the engagement surface of the button to correlate with the size of the human hand, the ease and comfort of operation of the worklight is dramatically improved over worklights having awkward switch mechanisms long thought in the prior art to be unavoidable.

Abstract: The invention discloses a keyswitch, which includes a substrate, a plurality of switches, a keycap, and at least one support. The switches are fixed on the substrate. The keycap thereof defines a bottom surface, which has a plurality of protruding portions, each of which corresponds to one of the switches. In addition, the at least one support is used for supporting the keycap to move vertically relative to the substrate, and each of the at least one support corresponds to one of the switches. Particularly, when the keycap is pressed, the protruding portions and/or the at least one supporting portion can trigger at least one of the switches.

Abstract: A keypad assembly having three-dimensional patterns includes a bottom layer, a light-guiding plate, a pattern layer, a coating layer and a surface layer. The light-guiding plate is overlapped on the bottom layer. The pattern layer is provided on the light-guiding plate. A plurality of three-dimensional patterns is provided on the pattern layer. The coating layer is coated on the upper surface of the pattern layer. The surface layer is overlapped on the coating layer. The surface layer is formed with a plurality of keycaps to correspond to the three-dimensional patterns. Via the above arrangement, patterns such as characters, symbols or icons can be displayed in the keycaps in a three-dimensional manner, thereby increasing recognition and visual effect.

Abstract: An appliance button for use in an appliance that has a housing, a button opening in the housing and a control structure within the housing. The appliance button includes a push button with a distal end of the push button that extends outwardly through the button opening in the housing. A button stem is located within the housing and is aligned with the push button. A proximal end of the button stem is operably connected to the control structure. A deflector is located within the housing and positioned between the button stem and the push button.

Abstract: A platform of the type holding a plurality of normally-open electric switches in position for activation of a selected individual switch by application of a force in a direction normal to a surface of the switch by a portion of a human body. An exemplary platform according to the invention forms a dance platform on which a user steps to activate switches in accordance with instructions viewed on a video display device. A joining structure may by used to hold two platforms in a side-by-side competition arrangement. A security vault may be affixed to structure associated with platform to resist theft of a commercially available game controller adapted to operate the video display and to receive switch input from a platform. Certain aspects of the invention include one or more, typically inert, practice platforms structured to represent the user interface surface of an activatable platform. A method for using a system of active and inert platforms is also disclosed.

Abstract: A key structure comprises a membrane circuit, a substrate, a cover and a press element. The membrane circuit comprises at least one first signal generator and a second signal generator. The substrate is disposed below the membrane circuit to support the membrane circuit. The cover comprises a body and at least one protrusion, wherein the protrusion is disposed on the body corresponding to the first signal generator. The press element is disposed on the second signal generator, wherein when force is applied on the cover, the protrusion presses the first signal generator.

Abstract: A key switch arrangement is able to prevent liquid such as water from entering a membrane sheet and staying therein. The key switch arrangement includes a waterproof sheet arranged above the membrane sheet, a first fixing member arranged in above the waterproof sheet and having a first projection protruding on the side of the waterproof sheet, and a second fixing member arranged below the membrane sheet and having a second projection protruding on the side of the membrane sheet. In the waterproof sheet and the second projection, holes are formed to which the first projection enters, while in the membrane sheet, a hole is formed to which the second projection enters so as to adhere the waterproof sheet closely to the second projection.

Abstract: A pushbutton switch is provided with: a switch case; a switch body fixed to the switch case; an elastic sealing body that is formed of an elastic material and covers and seals the switch body; a cap member that is formed of a hard material and is detachably mounted at a top portion of the elastic sealing body; a pushbutton portion provided on the cap member and exposing from a switch exposure aperture on a switch mounting apparatus; and a stopper portion provided on the cap member and configured to interfere with a rear surface of the switch mounting apparatus at a peripheral area of the switch exposure aperture and to restrain the cap member from being detached from the switch mounting apparatus, in a state in which the switch case is fixed to the switch mounting apparatus.

Abstract: Disclosed is a key sheet efficiently diffusing local heat generated by a device mounted on a board. A key sheet has a base sheet formed of a rubber-like elastic material in which a heat conductive filler is mixed. Thus, if a semiconductor device on a board generates heat, it is possible to suppress local heat storage by the heat conductive filler of the base sheet. Further, there is no need to provide a separate member for heat diffusion between the board and the key sheet, making it possible to realize a reduction in thickness. Thus, with the key sheet, it is possible to meet the requirement for heat diffusion to eliminate local heat storage in electronic apparatuses, and the requirement for a reduction in the thickness and weight of electronic apparatuses.

Abstract: A device comprises a device substance, a button, a button restriction element, and a circuit board. The device substance has a button opening. The button comprises a button substance, a first fixing element, a second fixing element, and a driving element. The button substance locates in the button opening. The first fixing element fixes on the first side of the button substance and wedges with the device substance. The second fixing element fixes on the second side of the button substance. The driving element locates on the button substance. The circuit board has a driving point, which is located correspondingly to the driving element. The button restriction element, capable of restricting the motion of the second fixing element to reduce buttons oblique.

Abstract: A push button of a computer keyboard includes a cap (10) and a key base (20) attached to cap. The cap includes a cover (12) and a post (14) extending from the cover along a first direction. The post includes a plurality of sidewalls (141) and at least one recessed guideway connected between the adjacent sidewalls. A through hole (28) is defined in the key base for receiving the post of the cap. At least one guide rib (243) is formed on the key base in the through hole. The at least one guide rib is resisted against the corresponding at least one guideway of the post of the cap along two tangent lines parallel to the first direction. The post of the cap is movable along the tangent lines.

Abstract: A low-noise cost-effective keyboard includes keys arranged in rows and columns in a housing. Each key has a mounting member affixed to the housing, at least one button, at least one connecting member integrally connected between the mounting member and the at least one button in a manner that a top surface of the at least one button is higher in elevation than the top surface of the mounting member, and at least one stop flange protruding from a side of the button opposite to the connecting member in a manner that an end edge of the at least one stop flange is lower in elevation than a bottom surface of the button and the stop flange of one key suspends beneath one button of another key.

Abstract: A press key structure is disclosed, which comprises: a keycap, configured with a bottom surface; a substrate; a first movable panel; and a second movable panel; wherein the substrate is arranged at a position underneath the keycap while disposing the first and the second movable panels in a space sandwiched between the substrate and the keycap and pivotally coupling the two by the use of a flange and a groove formed respectively on the two neighboring edges of the first and the second movable panels in a manner that the flange is slidably inset into the groove; and the each of the first and the second movable panels is coupled to the substrate by the center thereof while enabling the two edges of the first and the second movable panels that are away from each other to pivotally coupled to the bottom surface of the keycap.

Abstract: A housing adapted for use in an electronic device is provided. The housing includes a first member, a second member, and a fastener. The first member has a first fastening hole and a weakening structure disposed around the first fastening hole. The second member has a second fastening hole. The fastener passes through the first fastening hole and the second fastening hole to fix the first member and the second member to each other.

Abstract: A hand-held electronic device has a keyboard with a plurality of keys, each key having a substantially flat contact surface extending to the sides of each key. One of the sides of the key is beveled.

Abstract: The present invention provides a key switch with an exhaust structure, which includes a keycap having a top surface and an inner surface with a cavity and an elastic member. The elastic member includes a protrusion and an elastic body. The protrusion is coupled with the inner surface of the keycap. A gas channel is formed between the cavity of the keycap and the protrusion of the elastic member. When an external force is applied to the top surface of the keycap to compress the elastic body, the gas within the elastic member can be exhausted through the gas channel of the elastic member.

Abstract: Disclosed is a key sheet efficiently diffusing local heat generated by a device mounted on a board. A base sheet of a key sheet is provided with a heat diffusion sheet. The heat diffusion sheet is provided with a graphite sheet and a resin film and, in some cases, a thin metal plate. The base sheet itself thus constitutes the heat diffusion sheet, so even if no member for heat diffusion is provided between a board and the key sheet, it is possible to diffuse local heat generated by a semiconductor device in the face direction of the base sheet. Thus, with the key sheet, it is possible to meet the requirement for heat diffusion to eliminate local heat storage in electronic apparatuses and to meet the requirement for a reduction in the thickness and further in weight of electronic apparatuses.

Abstract: A switch assembly comprising a body, an actuator, and a base design to provide a device that can actuate various Hall-Effect chip devices in a single design. The switch assembly of the invention may provide a momentary switch connection, such as a single push system, or a maintained switch connection, such as a push-push system. Further, the switch assembly may include feedback mechanisms, such as LED components and the like that provide a visible feedback of the switch connection, and tactile feedback components that also indicate the switch connection.

Abstract: Provided is a stable key sheet in which, even if a key top is operated so as to be shifted sidewise, no excessive change, such as great tottering of the key top or overlapping of key tops each other, is caused. A key sheet including: a key top having a fixation protrusion protruding from a center of a bottom surface; and a base sheet to which the fixation protrusion is fixed, further includes a stopper plate having an opening through which the fixation protrusion of the key top is passed and whose edge faces a side of the fixation protrusion, in which, at a time of sidewise movement of the key top, the stopper plate abuts the key top to regulate the sidewise movement of the key top.

Abstract: A control panel is shown with at least one switch (12) whose actuating button (6) is situated in an opening (3) of a front panel (4), and with a housing (1) arranged in the region of the opening (3) of the front panel (4) and enclosing the switch (12), which housing forms between an inner and an outer circumferential wall (2, 5) an annular gap (8) for receiving at least one lighting means (11), which annular gap is open towards the front panel (3) and is covered in a light-transmitting manner. In order to provide advantageous constructional conditions it is proposed that that the housing (1) is inserted with its outer circumferential wall (2) in a flush manner into the opening (3) of the front panel (4) and encloses the actuating button (6) with its inner circumferential wall (5), and that the light-transmitting cover of the annular gap (8) between inner and outer circumferential wall (2, 5) consists of a foil (9) extending over the front panel (4).

Abstract: A modular operating switch assembly comprises a housing defining a plurality of switch operating cells. Each of the operating cells has guide walls, a switch actuating member in sliding contact with the guide walls, and a switch contact carrier configured to be selectively equipped with contact pairs such that each of the contact pairs is associated with at least one said switch actuating member. Each switch actuating member is operable to be selectively connected to a key cap associated with a single switch operating cell, or with a key cap associated with a plurality of adjacent switch operating cells.

Abstract: A switch assembly includes a base, a flat spring, a switch, and an actuating member. The base includes a central channel. The flat spring may be pivotally secured to a portion of the base. The switch is proximate the flat spring, and is configured to selectively open and close a circuit, such as an ignition circuit of a vehicle. The actuating member is positioned through the central channel and abuts the flat spring. The actuating member is configured to be engaged toward the flat spring in order to activate the switch, wherein movement of the actuating member in a first direction causes the flat spring to move in a second direction into the switch to activate the switch. The first direction may be perpendicular to the second direction.

Abstract: An electric control switch with a push-button comprises an electric contact having a first and a second electric state and an operating push-button having a first operating means designed to move due to the action of the external operating force. The operating push-button comprises a second operating means moving due to the action of an internal operating force to move the electric contact or contacts from the first electric state to the second electric state. The control switch comprises disconnection means between the first operating means and the electric contact or contacts. Said means comprise means for moving the electric contact or contacts from the first electric state to the second electric state and vice-versa at a speed the maximum value whereof is predetermined.

Abstract: A keyboard comprises a plurality of key assemblies and an elastic layer. The key assembly includes a key and a base. The base includes a plurality of opening. The key includes a keycap and a key pillar connected to the keycap. The key pillar vertically moves in the opening. The key pillar includes a bottom surface and a plurality of protrusions protruding from the bottom surface. The elastic layer includes a plurality of flexible portions. Each flexible portion includes a top portion. The protrusions surround the top portion for limiting the position of the flexible portion.

Abstract: A key switch preferably used for a keyboard as an input device in electronic equipment. The key switch includes a base section; a key top disposed above the base section; a pair of link members interlocked to each other to support and direct the key top in a vertical direction relative to the base section; a switch member including a contact section capable of opening and closing in response to a vertical movement of the key top; and a biasing member capable of applying an elastic biasing force in a vertically upward direction to the key top. The key switch further includes a protection member disposed and inserted between the base section and the key top at a position where the protection member surrounds the pair of link members, the contact section and the biasing member. The protection member is elastically deformed to follow the vertical movement of the key top, and protects the pair of link members, the contact section and the biasing member from penetration of foreign matter.

Abstract: The present invention is concerned with cover assemblies for manually resetting pressure switches used on oil and gas pipelines. The cover assembly encloses a volume of space on the pressure switch that houses a reset switch which is activated by depressing a button located on top of the reset switch. The cover assembly has a housing with a rod or plunger extending through the housing. On the exterior end of the rod is a protective cap and on the interior is a flexible rubber hemispherical bumper. A spring disposed between the cap and the exterior side of the cover housing biases the bumper away from the button on the reset switch. In operation, the cap is pushed towards the housing causing the rod or plunger to advance towards and contact the reset switch button. The bumper deforms or balloons outward upon contact with the button so as to impart sufficient force to depress the button but not so much force so as to damage or break the reset switch itself.

Abstract: A key. A scissors linking mechanism is disposed on a base plate and includes a first linking member and a second linking member. The first linking member pivots on the second linking member and includes a first end and a second end. The second linking member includes a third end and a fourth end. The second end includes a first guide pillar. The fourth end includes a second guide pillar. A keycap is disposed on the scissors linking mechanism and includes two first slides, two second slides, and a guiding protrusion. The first slides oppose each other and correspond to the first guide pillar. The second slides oppose each other and correspond to the second guide pillar. The guiding protrusion is disposed between the first slides. The first guide pillar enters the first slides through the guiding protrusion, enabling the second guide pillar to enter the second slides.

Abstract: One embodiment of the invention is a button for engaging an electrical switch comprising: a button post that transmits a vertical motion of the button to the electrical switch, an alignment post that registers against the electrical switch and reduces lateral motion of the button, and at least two runners that connect the button to a frame and includes reinforcement that stiffens the vertical motion of the button.

Abstract: A navigation key integrally formed with a panel in an electronic device comprises an outer key formed to have a resilient restoring force, and a holder for receiving the outer key, the holder integrally mounted on the panel. The holder comprises a tact pressing member for directly pressing a tact switch disposed thereunder when the outer key is pressed down.

Abstract: An operating device includes a switch member having a shaft holding part for holding a base end of a shaft member, an operating member having a mounting part formed in a substantially cylindrical shape which is adapted to be engaged with an end portion of the shaft member, and a stopper member which is engaged for mounting with the mounting part. The stopper member restricts relative movement of the shaft member in a state where a gap is left for permitting displacement of the shaft member in an axial direction, and releases the restriction when a load beyond a predetermined load in the axial direction of the shaft member is applied and locking members is deformed, thus permitting relative movement of the operating member with respect to the shaft member.

Abstract: A key switch includes a guiding and supporting mechanism for guiding and supporting a key top. The guiding and supporting mechanism is so constructed that a substantially ring-shaped stabilizer and a substantially U-shaped stabilizer are pivotally connected by shafts and bearing parts each having a semi-circular sectional shape.

Abstract: The invention provides a manual operation button having a large operable area. A manual operation button is composed of a manual operation plane, a holder for assembling the manual operation plane and a stopper for fixing the holder to a casing. The casing has a mounting hole having substantially the same size and shape as the manual operation plane, so that when the manual operation plane is assembled to the mounting hole, the manual operation plane forms a substantially continuous flat plane with the casing. The holder includes a substantially L-shaped mounting portion for mounting to the casing, a flat plate-like mounting plane for mounting the manual operation plane, and a hinge portion connecting the mounting portion and the mounting plane. The whole width of the hinge portion is disposed within the outer projection plane of the manual operation plane.

Abstract: A method and system of minimizing sticky keys in an electronic device having a body, circuitry, and a plurality of keypads is disclosed. The method and system comprise providing a protectant coating; and applying the protectant coating on surfaces of both the keypad and also the body to prevent sticking between the mating surfaces. A system and method is added in accordance with the present invention utilizing a protectant on critical surfaces which serves to prevent the residual buildup of contaminants following spills. In so doing the sticky key problem associated with the contaminated buildup is substantially eliminated.

Abstract: A keytop component for use in a keytop support member is disclosed that presses a key switch when the keytop component is pressed down. The keytop component includes a keytop member and a base member. The keytop member includes a pair of engagement members. The base member includes a pair of engagement receiving parts to be engaged by the pair of engagement members so as to detachably hold the keytop member, a locking section to lock the base member to the keytop support member, and a projection member extending downward under the base member for pressing the key switch when the base member is pressed down.

Abstract: The operating member is constructed by supporting the button members with the thin sheet member without integrally constructing the button members, and therefore, the device can be downsized and slimmed. The key tops of the button members can be individually surface-treated before assembly, and therefore, a user can easily recognize the kinds of buttons at the time of operation, and an operation mistake can be prevented.

Abstract: A button assembly comprises a cylindrical key top (132) loosely inserted into a hole (126) formed on a casing (10). The upper surface of the key top (132) is a pressed face (134). The assembly further comprises a deformation member (150) disposed below the key top (132) in the pressing direction. The deformation member (150) deforms to produce repulsive force when the key top (132) is pressed down. The assembly further comprises a conductive member (154) attached on the bottom of the deformation member (150), and switch contacts (166) which come into contact with the conductive member (154) and become conductive by the deformation of the deformation member (150). The central axis of the key top (132) and the central axis of the conductive member (154) are separated with certain spacing. The key top (132) has a hang-over member extending from the lower end of said key top over the central axis of the conductive member (154).

Abstract: A push button includes a button body, and a panel body. The button body includes a cylinder, a presser, and a rim. The cylinder has opposite ends, and an outer peripheral shape. The presser is disposed at one of the opposite ends of the cylinder, and forms a pressing surface. The rim protrudes beyond the outer peripheral shape of the cylinder, and has a rear surface facing the pressing surface back-to-back. The panel body includes a cylinder-shaped holder, a main body, and a flange. The cylinder-shaped holder holds the button body therein so as to enable the button body to reciprocate in an axial direction of the cylinder, and has an opening. The main body demarcates the opening of the cylinder-shaped holder. The flange protrudes radially inward, and has a leading end to be brought into contact with the rear surface of the rim.

Abstract: A key top comprising a key stem provided at a lower portion of the key top to be inserted into a rubber cup unit; and a first spring provided at a lower end of the key stem, and comprising a plate spring, wherein the key top is pushed down by finger pressure to turn on a contact point, thus executing key-in operation.

Abstract: In a keytop in which a mark indicating a function of the corresponding key switch is printed on the top surface of a keytop body made of a synthetic resin, the mark being a letter, a character, a numeral, a word, a symbol, a sign, a figure, a pattern or the like, or any combination thereof, and the mark is coated with a resin coating, a transparent or semitransparent coating that is soft, not slippery, and lusterless, is applied on the whole surface of the keytop body including the resin coating. Such transparent or semitransparent coating gives a soft feeling to the tip of an operator's finger as well as the tip thereof is hard to slip off the keytop, and hence the feeling thereof on operation is comfortable and the operativity thereof is satisfactory. Moreover, a line of the contour of the resin coating becomes disappeared and it is possible to completely take off the luster thereof. Accordingly, a grade in the external appearance of the keytop can be improved.

Abstract: A push switch apparatus includes a switch that has a movable contact and a fixed contact built therein, a driving body that makes the movable contact contact/separate with/from the fixed contact by pressing the switch, an operating knob that holds the driving body, and a housing that holds the operating knob to be moved in a direction in which the switch is pressed. An elastic member that holds the driving body so as to be moved in the direction in which the switch is pressed and suppresses the driving body and a stopper that regulates the movement of the driving body are provided in the operating knob. The driving body elastically comes into contact with the stopper by the elastic member.

Abstract: A switch comprising one or more keys mounted on a mat is disclosed. Each of the one or more keys includes a top section, a bottom section and an undercut region formed between the top section, the bottom section and the mat. Each of the one or more keys having a conductive surface mounted on an underside of the one or more keys. The switch also includes a substrate having one or more switch circuits corresponding to each of the one or more keys. Each of the one or more keys is mounted over each of the switch circuits and wherein when each of the keys is depressed the conductive surface contacts the switch circuit and completes the circuit. The switch further includes a bezel having one or more openings corresponding to the one or more keys. Each of the one or more keys is mounted through the one or more openings such that the top section of each of the one or more keys is on a top surface of the bezel and the bezel is in the undercut region.

Abstract: A push button switch for a vehicle is provided with a cylinder portion, a button portion slidably fitted in the cylinder portion and one or more resilient pieces interposed between an inner surface of the cylinder portion and a circumferential surface of the button portion. The resilient pieces are configured to prevent unsteadiness of the button portion in a sliding direction and a swinging direction.

Abstract: The knob fitting structure is provided with a knob; an operation shaft to which the knob is to be fitted; engaging stubs provided on one of the knob and the operation shaft and supporting side walls having snap-in holes 10f provided on the other, wherein the engaging stubs, when they are inserted into the snap-in holes, after elastically deforming the supporting side walls in a direction of thickness of the engaging stubs, are engaged within the snap-in holes, and the supporting side walls are provided with a slit communicating with outside through the snap-in holes.

Abstract: A touch pad pushbutton structure includes two pushbuttons mounted to a casing of an electronic device, such as a notebook computer. Each pushbutton has a circumferential flange. Two deflectable U-shaped ribs integrally extend from the flanges of the pushbuttons and connect between the pushbuttons at opposite ends of the pushbuttons. The ribs are fixed to the casing for movably supporting the pushbutton on the casing whereby each pushbutton is allowed to move from a released position where the flange of the pushbutton engages the casing to an actuated position where the pushbutton is depressed and the flange thereof separated from the casing for activating a circuit to generate a signal indicating the depression of the pushbutton.

Abstract: A keyboard key capable of lowering its overall height, which comprises a key cap body and a key cap base being coupled to the keyboard and disposed at the areas of four corners correspondingly having a displacing pillar and elevating groove, and an accommodating section of an electrically conductive cap body disposed at the corresponding central position of the key cap base and the key cap body, and a fixing section and a positioning section coupled to the key cap body and the key cap base respectively, and the displacing pillar and elevating groove are disposed separately at the four corners to reduce the moment of any point of the key cap body pressing the electrically conductive cap body in order to achieve the purposes of effectively lowering the overall height of the key and making the keyboard thin.

Abstract: A key array structure comprises a key array constituted by connecting a plurality of key members arranged in an array, it is characterized in that an elastic element is connected between each two adjacent key members and a positioning hole or position holes is or are disposed in the key member. The elastic member disposed between each two adjacent key members of the key array structure according to the present invention has a cushioning effect to adjust the deformation of the key array caused from the processes such as heat baking while manufacturing so as to allow the positioning hole in each key member to be precisely positioned with a corresponding position pin on a relative member.

Abstract: A button holding base member includes a button housing portion. A button is so housed in the button housing portion as to move in a button pushing direction. A button holder is assembled from the back side of an operation panel with the button. The button holder and the button interpose the operation panel inbetween thereby to prevent an illuminating light leakage. Moreover, the button holding base member and the button holder include a sliding portion at a position away from the button housing portion. As a result, the sliding structure is arranged independently of the illuminating light leakage preventing structure thereby to elongate the sliding distance. The stability of the button can be improved while retaining the illuminating light leakage preventing function.