TWI632573B - Keyswitch structure - Google Patents

Abstract

The button structure comprises a bottom plate, a key cap, a circuit board and a micro switch, wherein the bottom plate has a switch hole; the key cap is movably disposed above the bottom plate relative to the bottom plate; the circuit board is disposed on the bottom plate and has a through hole; the micro-motion relationship is located at the key cap The lower part passes through the through hole to be partially accommodated in the switch hole, and the micro-opening relationship electrically connects the circuit board. When the key cap moves toward the bottom plate, the key cap triggers the micro switch.

Description

Button structure

The present invention generally relates to a button structure, and more particularly to a button structure for improving the pressing feel and effectively reducing the height of the button.

Conventional keyboard structures typically use a thin film circuit layer as a signal generating switching element. Generally, the thin film circuit layer is composed of an upper circuit layer, a lower circuit layer, and a spacer layer separating the upper and lower circuit layers, wherein the upper and lower circuit layers have corresponding plurality of switch contacts as trigger circuits of the plurality of keys. . When the keycap triggers the thin film circuit layer, the upper circuit layer is deformed such that the switch contacts of the upper circuit layer contact the corresponding switch contacts of the lower circuit layer, thereby turning on the membrane switch to generate a signal. However, the thin film circuit layer is easily damaged by frequent use or improper application, and is difficult to repair. Moreover, when the trigger circuit corresponding to a certain button in the thin film circuit layer is damaged, the corresponding trigger circuit cannot be repaired for the individual keys, and the thin film circuit layer of the entire keyboard must be replaced, so that the maintenance cost is high.

In addition, when the user presses the keycap to trigger the thin film circuit layer, there is a lack of sharp step feedback, resulting in a poor hand feeling, and the user's manipulation feeling cannot be satisfied in the operation of the game.

Therefore, how to improve the pressing feel of the button structure and effectively reduce the button height is one of the focuses of research and development.

An object of the present invention is to provide a button structure that utilizes a micro switch to provide The user's pressing feel can enhance the feasibility of individual button repairs.

Another object of the present invention is to provide a button structure that integrates a light-emitting element and/or an electronic component on a circuit board to have an optimized button layout.

Another object of the present invention is to provide a button structure that accommodates the components of the button by the opening of the bottom plate to effectively reduce the height of the button.

In one embodiment, the present invention provides a button structure including a bottom plate, a key cap, a circuit board, and a micro switch, wherein the bottom plate has a switch hole; the key cap is movably disposed above the bottom plate relative to the bottom plate; and the circuit board is disposed on the bottom plate And having a through hole; the micro-opening relationship is located under the key cap and passes through the through hole to be partially accommodated in the switch hole, and the micro-opening relationship electrically connects the circuit board, and when the key cap moves toward the bottom plate, the key cap triggers the micro switch.

In one embodiment, the button structure further includes a light-emitting element, wherein the light-emitting element is electrically connected to the circuit board and exposed on the surface of the circuit board, so that the light-emitting element can project light toward the keycap.

In one embodiment, the button structure further includes an electronic component, wherein the bottom plate further has a component hole, and the electronic component is electrically connected to the circuit board and protrudes from the lower surface of the circuit board, and the electronic component is at least partially received in the component hole.

In one embodiment, the circuit board has an upper wiring layer and a lower wiring layer, wherein the upper wiring layer is electrically connected to the light emitting element, and the lower wiring layer is electrically connected to the electronic component.

In one embodiment, the button structure further includes a support unit, wherein the support unit connects the key cap and the bottom plate to support the movement of the key cap relative to the bottom plate.

In one embodiment, the bottom plate has at least one coupling member, and the circuit board has at least one hole, wherein at least one of the holes corresponds to the at least one coupling member, so that the coupling member is coupled to the supporting unit through the hole.

In one embodiment, the circuit board is a hard printed circuit board. When the key cap triggers the micro switch according to the pressure to move toward the bottom plate, the hard printed circuit board can withstand the pressing force transmitted by the micro switch, and is free from downward bending deformation.

In one embodiment, the micro switch has a housing and at least one pin, and at least one of the pins extends horizontally from the middle of the housing, and then is bent downward to electrically connect the circuit board.

In one embodiment, the switch hole is larger than the through hole, so that at least one of the pins is bent downward to electrically connect the circuit board to the circuit board, and the lower end portion of the pin is received in the switch hole, and the lower end portion of the pin is The bottom plate maintains a preset spacing.

In one embodiment, the aperture size of the through hole is consistent with the outer diameter of the housing of the micro switch, such that the micro switch is embedded in the through hole, and the housing of the micro switch is substantially in contact with the inner wall of the through hole.

In another embodiment, the present invention provides a button structure including a bottom plate, a circuit board, a key cap, a supporting unit, and a micro switch, wherein the circuit board is disposed on the bottom plate; the key cap is disposed above the circuit board, and between the key cap and the bottom plate Maintaining a distance, the key cap has a center line of the key cap; the support unit is disposed between the bottom plate and the key cap, and the support unit is connected to the key cap and the bottom plate to support the movement of the key cap relative to the bottom plate, and the support unit has a center line with respect to the key cap Symmetrical structure; the micro switch is disposed under the key cap, and the middle line of the key cap passes through the micro switch. The micro switch is surrounded by the supporting unit. The micro switch has a bottom surface of the housing and a plurality of pins, and the micro switch is electrically connected through a plurality of pins. a circuit board, the bottom surface of the housing at least partially abuts the upper surface of the circuit board; when the key cap is pressed to move toward the bottom plate, the key cap triggers the micro switch; when the key cap is released, the micro switch causes the key cap to move upward toward Move away from the bottom plate.

In another embodiment, the present invention provides a button structure including a bottom plate, a circuit board, a key cap, a micro switch, and an electronic component, wherein the bottom plate has a component hole; the key cap is relative to the key The bottom plate is movably disposed above the bottom plate; the circuit board is disposed on the bottom plate; the micro switch is disposed under the key cap, the micro switch has a bottom surface of the housing and a plurality of pins, and the micro switch is electrically connected to the circuit board through the plurality of pins, and the shell The bottom surface of the body at least partially abuts the upper surface of the circuit board; the electronic component is electrically connected to the circuit board and protrudes from the lower surface of the circuit board, and the electronic component is at least partially received in the component hole.

In an embodiment, the circuit board further has a through hole, and at least a part of the bottom surface of the housing is disposed through the through hole to achieve a positioning effect. -

10, 10'‧‧‧ button structure

110, 110’‧‧‧ bottom plate

112‧‧‧Switch hole

114‧‧‧Component hole

116, 116a, 116b‧‧‧ couplings

118‧‧‧ coupling

119‧‧‧Second coupling

120‧‧‧Key Cap

122, 122a, 122b‧‧‧ joints

124‧‧‧Connecting Department

126‧‧‧First coupling

130, 130’, 130”‧‧‧ boards

132‧‧‧through hole

134‧‧‧ hole

136‧‧‧Feel soldering holes

137‧‧‧Upper wiring layer

138‧‧‧ under the wiring layer

139‧‧‧ Soldering Department

140‧‧‧Micro Switch

140a‧‧‧shell

140b‧‧‧Bottom of the casing

141a‧‧ mid-section housing

141b‧‧‧Bottom shell

142‧‧‧Trigger

142a‧‧‧ bumps

144‧‧‧Switch Department

146‧‧‧ feet

146a‧‧‧ horizontal extension

146b‧‧‧ vertical extension

150‧‧‧Support unit

152‧‧‧First bracket

154‧‧‧second bracket

160‧‧‧Lighting elements

170‧‧‧Electronic components

250‧‧‧Support unit

252‧‧‧First bracket

254‧‧‧second bracket

350‧‧‧Support unit

352‧‧‧First bracket

354‧‧‧second bracket

C‧‧‧Keycap centerline

1A and FIG. 1B are exploded views of different perspectives of a button structure according to an embodiment of the present invention; FIGS. 1C and 1D are respectively schematic cross-sectional views of the button structure of FIG. 1A in different directions; FIG. 2 to FIG. 5 are different embodiments of the present invention. FIG. 6A and FIG. 6B are exploded views of different perspectives of the button structure according to another embodiment of the present invention; FIG. 6C and FIG. 6D are respectively schematic cross-sectional views of the button structure of FIG. 6A in different directions; A schematic diagram of a button structure according to still another embodiment of the present invention.

The invention provides a button structure, which can be applied to any push-type input device, such as a keyboard, to improve the pressing feel, effectively reduce the button height, and improve maintenance feasibility. The structure and operation of the components of the key structure of the embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1A to FIG. 1D , in an embodiment, the button structure 10 includes a bottom plate 110 , a key cap 120 , a circuit board 130 , and a micro switch 140 . The bottom plate 110 has a switch hole 112; the key cap 120 is movably disposed above the bottom plate 110 with respect to the bottom plate 110; the circuit board 130 is disposed on the bottom plate 110 and The through hole 132 and the pin welding hole 136 are provided; the micro switch 140 is located below the key cap 110 and passes through the through hole 132 to be partially accommodated in the switch hole 112, and the micro switch 140 is electrically connected to the circuit board 130. When the keycap 120 moves toward the bottom plate 110, the keycap 120 triggers the microswitch 140. In addition, the button structure 10 may further include a support unit 150 that supports the movement of the keycap 120 relative to the bottom plate 110, a light-emitting element 160 that projects light toward the keycap 120, and/or an electronic component 170 (described in detail later). It should be noted that although only a single button structure 10 is used in the embodiment, when a plurality of button structures 10 are combined into a keyboard, some components of each button structure 10 can be integrated into a single component to reduce manufacturing cost and The cost of assembly costs.

Specifically, the bottom plate 110 defines a switch hole 112 and an element hole 114 for respectively receiving the micro switch 140 and the electronic component 170. In this embodiment, the switch hole 112 and the component hole 114 preferably penetrate through the hole of the bottom plate 110, so that the bottom plate 110 has the largest accommodating space in the thickness direction (ie, the moving direction of the key cap 120), but not Limited. In other embodiments, the switch hole 112 and the component hole 114 may be recessed spaces formed from the upper surface of the bottom plate 110 in a direction away from the key cap 120 (ie, downward), that is, the switch hole 112 and the component hole 114 are formed in A blind hole in the bottom plate 110. As will be described in detail later, the micro switch 140 has a housing 140a and at least one pin 146, wherein the housing 140a includes a middle housing 141a and a lower housing 141b, and the outer housing 141a is preferably different from the lower housing. The body 141b is shaped outside. For example, the housing 140a has a wider mid-section housing 141a and a narrower lower end housing 141b. At least one pin 146 is horizontally extended from the middle case 141a of the housing 140a of the switch portion 144 to form a horizontal extension portion 146a, and then bent downward to form a vertical extension portion 146b to electrically connect the circuit board 130. The size and shape of the switch hole 112 and the component hole 114 are respectively adapted to accommodate the micro switch 140 (including the pin 146) and the electronic component 170, and are kept at a predetermined distance from the pin 146 of the micro switch 140 and the electronic component 170. When the bottom plate 110 is made of metal, the micro switch can be avoided. The pin 146 of 140 or the electronic component 170 and the bottom plate 110 generate a tip discharge and are short-circuited. In addition, corresponding to the arrangement of the support unit 150, the bottom plate 110 further has at least one coupling member (eg, 116a, 116b) to couple the support unit 150. In this embodiment, the plurality of hooks are protruded from the upper surface of the bottom plate 110 toward the key cap 120 (ie, upwardly) as the coupling members 116a, 116b of the support unit 150, but are not limited thereto. In other embodiments, the coupling members 116a, 116b may vary differently depending on the structure of the support unit 50. The bottom plate 110 may be mechanically machined and bent by a metal plate or molded by a plastic to form an integral structure having the switch hole 112, the component hole 114 and the coupling members 116a, 116b, but is not limited thereto. In other embodiments, the coupling members 116a, 116b can be disposed on the bottom plate 110 by adhesion, welding, locking, or the like.

The support unit 150 is disposed between the keycap 120 and the bottom plate 110 and coupled to the key cap 120 and the bottom plate 110 respectively to support the movement of the key cap 120 relative to the bottom plate 110. In this embodiment, the support unit 150 includes a first bracket 152 and a second bracket 154. The first bracket 152 is rotatably pivotally connected to the second bracket 154 to form a scissor support unit, but is not limited thereto. Specifically, the two ends of the first bracket 152 are rotatably and movably coupled to the coupling portion 122a of the bottom surface of the keycap 120 and the coupling member 116a of the bottom plate 110, respectively. The joint portion 122b and the coupling member 116b of the bottom plate 110 are movably and rotatably connected; further, as shown in FIG. 1C, the first bracket 152 and the second bracket 154 at the right end of the scissor support unit 150 and the key bracket respectively 120 and the bottom plate 110 are connected, and the left end is opposite, that is, the first bracket 152 and the second bracket 154 are respectively connected to the bottom plate 110 and the key cap 120.

The circuit board 130 is preferably a printed circuit board having a line layout for electrically connecting the micro switch 140. The circuit board 130 can be formed by machining to form the through hole 132 and the pin welding hole 136, and the pin welding hole 136 is not in communication with the through hole 132. When the circuit board 130 is disposed on the bottom plate 110, the through holes 132 are aligned with the switch holes 112 that communicate with the bottom plate 110. The size and shape of the through hole 132 are preferably Corresponding to the size and shape of the housing 140a of the micro switch 140, the size and position of the pin welding hole 136 preferably correspond to the pin 146 of the micro switch 140, so that the micro switch 140 can be embedded in the through hole of the circuit board 130. 132, and at least one of the pins 146 is inserted into the at least one of the soldering holes 136, and the partial housing 140a (eg, the lower end housing 141b) and the pins 146 protrude from the lower surface of the circuit board 130 to be received in the bottom plate 110. In the switch hole 112. In addition, the aperture size of the through hole 132 preferably matches the outer diameter of the lower end housing 141b of the housing 140a of the micro switch 140, so that the lower portion of the micro switch 140 is protrudedly embedded in the through hole 132, and the shell of the micro switch 140 The body 140a (eg, the lower end case 141b) substantially conforms to the inner wall of the through hole 132 to enhance the positioning of the micro switch 140, and the wider middle case 141a cannot enter the through hole 132 to be positioned on the circuit board 130. Above, the pin horizontal extension 146a is located above the circuit board 130, and the vertical extension 146b is electrically connected to the circuit board 130. In other words, the cross-sectional area of the middle casing 141a is larger than the cross-sectional area of the lower casing 141b, so that the middle casing 141a cannot enter the through hole 132, and preferably abuts the upper surface of the circuit board 130, but is not limited thereto. In other embodiments, the through hole 132 may be slightly larger than the micro switch 140 such that when the micro switch 140 is partially received in the through hole 132 of the circuit board 130 and partially received in the switch hole 112 of the bottom plate 110, the housing 140a of the micro switch 140 There is a slight gap between the inner wall of the through hole 132.

In this embodiment, as shown in FIG. 1D, the circuit board 130 preferably has an upper wiring layer 137 and a lower wiring layer 138 on the upper and lower surfaces thereof, respectively, to electrically connect the light emitting unit 160 and the electronic component 170, respectively, so that the circuit The board 130 not only provides an electrical path for signal conduction of the microswitch 140, but also provides an electrical path for driving the light unit 160 and the electronic component 170. Specifically, as shown in FIG. 1D, the light-emitting element 160 and the electronic component 170 are preferably disposed on the upper and lower surfaces of the circuit board 130, respectively. The light-emitting element 160 is electrically connected to the wiring layer 137 on the circuit board 130 and exposed on the upper surface of the circuit board 130. The light-emitting element 160 is preferably located in the vertical projection range of the inner frame 152 and adjacent to the through hole 132. The light emitted by the light-emitting element 160 can be more uniformly projected onto the bottom surface of the keycap 120, so that the key structure 10 becomes a light-emitting key. In this embodiment, the light-emitting element 160 can be implemented as a light-emitting diode that emits light upward. The electronic component 170 electrically connects the wiring layer 138 under the circuit board 130 and protrudes from the lower surface of the circuit board 130, so that the electronic component 170 can be at least partially received in the component hole 114 of the bottom plate 110. Thereby, the extra space required for the electronic component 170 in the button structure can be reduced or even eliminated, thereby effectively reducing the overall height of the button structure 10. In this embodiment, the electronic component 170 can be various electronic components required for the operation of the button structure 10 or the keyboard device, such as a micro control unit, a resistor, a capacitor, an inductor, etc., but is not limited thereto.

Furthermore, as shown in FIG. 1A and FIG. 1B, the circuit board 130 has at least one hole 134, wherein at least one hole 134 corresponds to at least one coupling member 116a, 116b, so that the coupling members 116a, 116b of the bottom plate 110 are upward. The support unit 150 is coupled through the hole 134. In this embodiment, the circuit board 130 is preferably a hard printed circuit board, so that when the keycap 120 triggers the micro switch 140 according to the pressing force toward the bottom plate 110, the hard printed circuit board 130 can withstand the pressing force transmitted by the micro switch 140. The invention is not limited to the downward bending deformation, thereby reducing the chance of damage caused by the trigger deformation of the conventional thin film circuit layer, but is not limited thereto. In other embodiments, circuit board 130 can be a flexible printed circuit board (FPC) that provides an electrical path for the desired line layout.

The microswitch 140 can be any suitable mechanical switch constructed from shrapnel, relatively movable terminals. The micro switch 140 includes a triggering portion 142 and a switch portion 144, wherein the triggering portion 142 is movable relative to the switch portion 144 when receiving the pressing force to trigger the micro switch 140 to generate a signal, and is movable relative to the switch portion 144 when the pressing force is released. To revert to the untriggered position. That is, when the triggering portion 142 is moved by the pressing force, the elastic piece is deformed to drive the terminal to move relative to each other to generate a trigger signal; after the pressing force is released, the terminal is relatively far away by the restoring force of the elastic piece. The trigger portion 142 is returned to the position before the pressing. Furthermore, the micro switch 140 has a housing 140a and at least one pin 146, wherein at least one of the pins 146 extends horizontally from the middle of the housing 140a of the switch portion 144, and then is bent downward to electrically connect the circuit. Board 130. In this embodiment, after at least one of the pins 146 is bent downward to electrically connect the circuit board 130, the lower end portion of the pin 146 is preferably placed in the switch hole 112. That is, in this embodiment, the switch hole 112 of the bottom plate 110 is preferably larger than the through hole 132 of the circuit board 130, so that the micro switch 140 is disposed in the through hole 132, and not only the switch portion 144 is partially received in the switch hole 112 but also The portion of the pin 146 protruding from the lower surface of the circuit board 130 can also be received in the switch hole 112, so that the lower end portion of the pin 146 is kept at a predetermined interval from the bottom plate 110, so that when the bottom plate 110 is made of metal, the pin can be avoided. The end portion and the bottom plate 110 generate a tip discharge and short circuit; but not limited thereto, for example, an insulating material or a coating insulating barrier may be additionally disposed between the two. In other embodiments, the bottom plate 110 can define additional holes (not shown) for receiving the lower end portion of the pin 146.

In addition, the triggering portion 142 preferably has a bump 142a at the top end thereof, so that when the micro switch 140 is disposed under the key cap 120, the bottom surface of the key cap 120 can be contacted by the bump 142a. When the pressing force is applied to the keycap 120 to move the keycap 120 downward toward the bottom plate 110, the bottom surface of the keycap 120 will press the triggering portion 142 of the micro switch 140, and the triggering portion 142 will move downward toward the switch portion 144 to generate a trigger. signal. When the pressing force is released, the triggering portion 142 is automatically reset to move away from the switch portion 144 (ie, upward), and the key cap 120 is upwardly directed away from the bottom plate 110 by the support of the supporting unit 150 and the driving of the triggering portion 142. Move back to the unpressed position.

It should be noted here that the key structure of the present invention may have different support units or connection mechanisms to support the movement of the keycap 120 relative to the bottom plate 110. In another embodiment, as shown in FIG. 2, the support unit 250 includes a first bracket 252 and a second bracket 254, wherein the first bracket 252 and the second bracket 254 are each rotatably coupled to the keycap 120 and movably Connecting the bottom plate 110 to support the keycap 120 moves relative to the bottom plate 110. For example, the upper ends of the first bracket 252 and the second bracket 254 are respectively rotatably connected to the joint portion 122 of the bottom surface of the keycap 120, and the lower ends of the first bracket 252 and the second bracket 254 are movably connected to the bottom plate 110, respectively. The coupling member 116 of the upper surface. When the keycap 120 moves toward the bottom plate 110, the first bracket 252 and the second bracket 254 are slid on the bottom plate 110 in a direction away from each other to support the keycap 120 to smoothly move downward. When the keycap 120 moves away from the bottom plate 110, the first bracket 252 and the second bracket 254 are slid on the bottom plate 110 toward each other to support the keycap 120 to stably move upward. In another embodiment, as shown in FIG. 3, the support unit 350 includes a first bracket 352 and a second bracket 354, wherein the first bracket 352 and the second bracket 354 are rotatably connected to the keycap 120 and the bottom plate 110, respectively. The support keycap 120 is vertically and horizontally displaced relative to the bottom plate 110. It should be noted that the first bracket 252 (or 352) and the second bracket 254 (or 354) may respectively be a frame type link structure, wherein the first bracket 252 and the second bracket 254 (or the first bracket 352 and the The two brackets 354) preferably have the same structure to reduce the manufacturing cost, but are not limited thereto.

Furthermore, there may be other connection mechanisms between the keycap 120 and the bottom plate 110 to support the movement of the keycap 120 relative to the bottom plate 110. In another embodiment, as shown in FIG. 4, the bottom surface of the key cap 120 may be provided with a connecting portion 124 having a sliding slot, and the upper surface of the bottom plate 110 is provided with a coupling portion 118 having a convex rail, wherein the convex rail is inserted into the sliding slot. The connecting portion 124 is movably coupled to the coupling portion 118. When the keycap 120 moves relative to the bottom plate 110, the convex rail of the coupling portion 118 moves relative to the sliding groove of the connecting portion 124 to support the keycap 120 to stably move. In another embodiment, as shown in FIG. 5, the bottom surface of the key cap 120 may be provided with a first coupling portion 126 having a sloped surface, and the upper surface of the bottom plate 110 is provided with a second coupling portion 119 having a corresponding slope. When the keycap 120 moves relative to the bottom plate 110, the slope of the first coupling portion 126 moves relative to the slope of the second coupling portion 119, and the keycap 120 is opposite to the bottom plate 110. At the same time, vertical displacement and horizontal displacement are generated.

It should be noted that in the above embodiments of FIG. 2 to FIG. 5, the arrangement and function of other components of the button structure (for example, the circuit board 130, the micro switch 140, the light-emitting component 160, and the electronic component 170, etc.) and the above-mentioned button structure 10 For the structure and connection relationship of each component, reference may be made to the related description of the embodiment of FIG. 1A to FIG. 1D, and details are not described herein again.

Furthermore, although the through-hole soldering technique is used as an example of the micro-switching electrical connection circuit board in the above embodiment, in other embodiments, the micro-switch can also be electrically connected to the circuit board by surface soldering technology (SMT). As shown in FIG. 6A to FIG. 6D, in another embodiment, the button structure 10' of the present invention includes a bottom plate 110', a key cap 120, a circuit board 130', a support unit 150, and a micro switch 140, wherein the circuit board 130' is disposed. On the bottom plate 110'; the key cap 120 is disposed above the circuit board 130', a distance is maintained between the key cap 120 and the bottom plate 110', and the key cap 120 has a key cap center line C. The supporting unit 150 is disposed between the bottom plate 110 ′ and the key cap 120 , and the supporting unit 150 is connected to the key cap 120 and the bottom plate 110 ′ to support the movement of the key cap 120 relative to the bottom plate 110 ′ relative to the key cap center line C It is preferred to have a symmetrical structure. The micro switch 140 is disposed under the key cap 120, and the key cap center line C passes through the micro switch 140. The micro switch 140 is surrounded by the supporting unit 150. The micro switch 140 has a bottom surface 140b and a plurality of pins 146. The micro switch 140 is electrically connected to the circuit board 130' through a plurality of pins 146. The bottom surface 140b of the housing at least partially abuts On the upper surface of the circuit board 130'. That is, when the micro switch 140 is electrically connected to the circuit board 130' by surface soldering technology, the case bottom surface 140b of the micro switch 140 is at least partially substantially in contact with the upper surface of the circuit board 130'. When the keycap 120 is pressed to move toward the bottom plate 110', the keycap 120 triggers the microswitch 140; when the keycap 120 is released, the microswitch 140 moves the keycap 120 upwardly away from the bottom plate 110'.

It should be noted here that the micro switch 140 of the embodiment is by surface soldering technology. The circuit board 130' is electrically connected. Therefore, the difference between the embodiment and the embodiment of FIG. 1 is that the bottom plate and the circuit board can have different design changes. For example, the bottom plate 110' may not have the switch hole 112 of FIG. The component hole 114 of the component 170; the circuit board 130' may have the pin soldering hole 136 of FIG. 1 and has a soldering portion 139 for electrically connecting the pin 146 of the micro switch 140 when the surface is micro-switched. In this embodiment, the circuit board 130' may also optionally have no vias 134 of FIG. For details of the structure, connection, and function of other similar components (such as the keycap 120, the support structure 150, the light-emitting component 160, the electronic component 170, etc.), reference may be made to the related description of FIG. 1, and details are not described herein again.

Furthermore, in response to the design of the micro switch, as shown in FIG. 7, the circuit board 130" may have a through hole 132 and a solder portion 139, so that when the surface of the micro switch 140 is soldered to the circuit board 130", at least part of the shell of the micro switch 140 The body bottom surface 140b is disposed through the through hole 132 to achieve a positioning effect.

It should be noted here that the surface soldering technique can also be applied to the embodiments of the different supporting units or connecting mechanisms of FIGS. 2 to 5, so that the circuit board and the bottom board of FIGS. 2 to 5 have a structure similar to that of FIG. 6A or FIG. Structure configuration, which will not be described here.

Compared with the prior art, the button structure of the present invention can enhance the user's pressing feeling by the setting of the micro switch, and the micro-opening relationship is integrated into the circuit board that provides the required electric path, and the feasibility of the individual button maintenance can be improved. Convenience. Furthermore, the button structure of the present invention can fully utilize the thickness of the circuit board and the bottom plate by setting the circuit board above the bottom plate and opening holes (such as through holes and switch holes) for accommodating the micro switch, thereby effectively reducing the structure of the button. Overall height. In addition, the button structure of the present invention integrates the electronic components under the circuit board and accommodates the electronic components through the component holes opened in the bottom plate, thereby further reducing the overall height of the button structure.

The present invention has been described by the above embodiments, but the above embodiments are for illustrative purposes only and are not intended to be limiting. Those skilled in the art know that they are not deviated from the spirit of the present invention. The embodiments of the invention may have other modifications of the illustrative embodiments. Accordingly, the scope of the invention is intended to cover such modifications and are only limited by the scope of the appended claims.

Claims (18)

A button structure comprising: a bottom plate having a switch hole; a key cap movably disposed above the bottom plate relative to the bottom plate; a circuit board disposed on the bottom plate and having a through hole; and a micro switch Is located under the keycap and passes through the through hole to be partially received in the switch hole, the micro switch has a middle casing and at least one pin, and the at least one pin extends horizontally from the middle casing And forming a horizontal extension, and then bending downward to electrically connect the circuit board, the keycap triggers the micro switch when the keycap moves toward the bottom plate. The button structure of claim 1, further comprising a light-emitting component, wherein the light-emitting component is electrically connected to the circuit board and exposed on the surface of the circuit board, so that the light-emitting component can project a light toward the keycap. The button structure of claim 1 or 2, further comprising an electronic component, wherein the bottom plate further has a component hole, the component hole penetrating the bottom plate, and the electronic component is electrically connected to the circuit board and protrudes from the circuit The lower surface of the board, the electronic component is at least partially received in the component hole, the component hole is larger than the electronic component, and the electronic component is kept separated from the bottom plate. The button structure of claim 2, further comprising an electronic component, wherein the bottom plate further has a component hole, and the electronic component is electrically connected to the circuit board and protrudes from a lower surface of the circuit board, the electronic component is at least partially The circuit board has an upper wiring layer and a lower wiring layer. The upper wiring layer is electrically connected to the light emitting component, and the lower wiring layer is electrically connected to the electronic component. The button structure of claim 1, further comprising a supporting unit, wherein the supporting unit is connected to the keycap and the bottom plate to support movement of the keycap relative to the bottom plate, wherein the bottom plate has at least one coupling member, and the bottom plate has at least one coupling member The circuit board has at least one hole, and the at least one hole corresponds to at least one coupling member, so that the coupling member is coupled to the supporting unit through the hole. The key structure of claim 1, wherein the circuit board is a hard printed circuit board, and the hard printed circuit board can bear the micro-motion when the key cap triggers the micro switch according to a pressing force toward the bottom plate. The pressing force transmitted by the switch is free from bending deformation. The button structure of claim 1, wherein the circuit board further has at least one pin welding hole, the pin welding hole not communicating with the through hole, the pin welding hole position corresponding to the at least one pin When the micro switch passes through the through hole to be partially received in the switch hole, the at least one pin enters the at least one pin soldering hole. The button structure of claim 1, wherein the switch hole is larger than the through hole, and the lower end portion of the pin is received in the switch hole after the at least one pin is bent downward to electrically connect the circuit board. And keeping the lower end portion of the pin and the bottom plate at a predetermined distance. The button structure of claim 1, wherein the micro switch further has a lower end housing, the outer portion of the middle portion is different from the shape of the lower end housing, and the aperture size of the through hole is different from the micro switch The outer diameter of the lower end case is matched, so that the micro switch is embedded in the through hole, and the lower end of the micro switch is substantially in contact with the inner wall of the through hole, and the middle case cannot enter the through hole. Abutting on the upper surface of the circuit board, the horizontal extension of the pin is located above the circuit board. The button structure of claim 9, wherein the cross-sectional area of the middle casing is larger than the cross-sectional area of the lower casing, so that the middle casing cannot enter the through hole. A button structure comprising: a bottom plate; a circuit board disposed on the bottom plate; a key cap disposed above the circuit board, the key cap and the bottom plate maintaining a spacing; a support unit disposed between the bottom plate and the key cap The support unit is connected to the keycap and the bottom plate to support movement of the keycap relative to the bottom plate; and a micro switch is disposed under the keycap, the micro switch is surrounded by the support unit, and the micro switch has a The housing and the plurality of pins, the housing includes a middle casing, and one of the plurality of pins extends horizontally from the middle casing to form a horizontal extension of the pin, and then bends downward Electrically connecting the circuit board, a portion of the housing abuts against an upper surface of the circuit board; when the key cap is pressed to move toward the bottom plate, the key cap triggers the micro switch; when the key cap is released The microswitch moves the keycap upward toward the direction away from the bottom plate. A key structure includes: a bottom plate having a component hole; a key cap movablely disposed above the bottom plate relative to the bottom plate; a circuit board disposed on the bottom plate; and a micro switch disposed on the key cap In the lower part, the micro switch has a casing and a plurality of pins. The casing comprises a middle casing, and one of the plurality of pins extends horizontally from the middle casing to form a horizontal extension of the pin. And then bending downward to electrically connect the circuit board, and a portion of the housing abuts against an upper surface of the circuit board; and an electronic component electrically connecting the circuit board and protruding under the circuit board Surface, the electron element The piece is at least partially received in the hole of the element. The button structure of claim 11 or 12, further comprising a light-emitting component, wherein the light-emitting component is electrically connected to the circuit board and exposed on an upper surface of the circuit board, so that the light-emitting component can project a light toward the keycap . The button structure of claim 11, further comprising an electronic component, wherein the bottom plate further has a component hole, and the electronic component is electrically connected to the circuit board and protrudes from a lower surface of the circuit board, the electronic component is at least Part of the content is placed in the hole of the component. The button structure of claim 12 or 14, further comprising a light-emitting component, wherein the light-emitting component is electrically connected to the circuit board and exposed on an upper surface of the circuit board, so that the light-emitting component can project a light toward the keycap And wherein the circuit board has an upper wiring layer and a lower wiring layer, the upper wiring layer is electrically connected to the light emitting element, and the lower wiring layer is electrically connected to the electronic component. The button structure of claim 11 or 12, wherein the circuit board further has a through hole and a pin welding hole, and the pin welding hole is not in communication with the through hole, and the pin welding hole position corresponds to the One of the plurality of pins, when the micro switch is disposed in the through hole, one of the plurality of pins enters the pin welding hole. The button structure of claim 16, wherein the housing further comprises a lower end housing, the outer portion of the middle portion is different from the outer shape of the lower end housing, and the aperture size of the through hole is different from the micro switch The outer diameter of the lower end case is matched, so that the micro switch is embedded in the through hole, and the lower end of the micro switch is substantially in contact with the inner wall of the through hole, and the middle case cannot enter the through hole. Abutting on the upper surface of the circuit board, the horizontal extension of the pin is located above the circuit board. The button structure of claim 17, wherein the cross-sectional area of the middle casing is larger than the cross-sectional area of the lower casing, so that the middle casing cannot enter the through hole.