Double-contact silica gel key switch

Abstract

The utility model discloses a double contact silica gel button switch, comprising a housing, a PCBA circuit board, a silica gel pad and a button, the PCBA circuit board is fixedly installed in the housing, the silica gel pad covers the PCBA circuit board, the housing is provided with a first through hole in sliding connection with the button, the PCBA circuit board is provided with a first conductive disc and a second conductive disc, the silica gel pad is provided with a first elastic silica gel button, and the button is provided with a second elastic silica gel button. The first elastic silica gel key comprises a first pressing part and a first elastic inclined wall which is annularly distributed, a first elastic cavity with a downward opening is defined by the first pressing part and the first elastic inclined wall, and the first pressing part is provided with two conductive contacts corresponding to the first conductive disc and the second conductive disc respectively; the key is provided with a touch block corresponding to the first elastic silica gel key. According to the utility model, the structural design of the double-contact silica gel key is adopted, double-key linkage is adopted, and conduction of different circuits can be realized by pressing simultaneously, so that the stability and accuracy of switch control are improved, and the hand feeling is better.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a double-contact silica gel key switch. Background Art

[0002] At present, the conventional silicone key switch structure generally covers the PCBA circuit board with a silicone pad, and a plurality of elastic silicone keys with a conductive contact are integrally formed on the silicone pad. By pressing, the conductive contact on a certain elastic silicone key corresponds to the conductive disk on the PCBA circuit board, thereby achieving the conduction effect of the circuit. For example, the Chinese utility model patent with the publication number CN218918696U discloses a push-type door opening switch with backlight, including a shell, a bottom shell, a circuit board assembly, a silicone plate, and a key. The circuit board is provided with two touch signal input points (i.e., conductive disks) arranged side by side, and the silicone plate is provided with two contacts (i.e., conductive contacts) protruding in the vertical direction of the silicone plate and matching the positions of the two signal input points, that is, one elastic silicone key is only provided with one conductive contact. When it is necessary to conduct the circuits of the two conductive disks at the same time, it is necessary to use one key to press the two elastic silicone keys at the same time. In this way, it is very easy to cause failure or false touch due to uneven force when the key is pressed down. Utility Model Content

[0003] The utility model aims to provide a double-contact silicone key switch, which well solves the problems mentioned in the above background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A double-contact silicone key switch comprises a housing, a PCBA circuit board, a silicone pad and a key, wherein the PCBA circuit board is fixedly installed in the housing, the silicone pad covers the PCBA circuit board, the housing is provided with a first through hole above the PCBA circuit board, the key is slidably connected to the first through hole, the upper surface of the PCBA circuit board is provided with a first conductive plate and a second conductive plate, the silicone pad is provided with a first elastic silicone key perpendicular to the silicone pad, the first elastic silicone key comprises a first pressing portion and a first elastic inclined wall distributed in an annular manner, the upper end of the first elastic inclined wall is connected to the first pressing portion, the lower end of the first elastic inclined wall is connected to the silicone pad, the first pressing portion and the first elastic inclined wall enclose a first elastic cavity with an opening facing downward, the first pressing portion is provided with two conductive contacts corresponding to the first conductive plate and the second conductive plate respectively on a side surface facing the first elastic cavity; the key is provided with a touch block corresponding to the first elastic silicone key at one end close to the silicone pad.

[0006] Furthermore, the PCBA circuit board is provided with an LED lamp, the silicone pad is provided with a light-transmitting cover for covering the LED lamp, and the key is provided with a second through hole and a light-transmitting portion corresponding to the light-transmitting cover. The light generated by the LED lamp can be irradiated to the light-transmitting portion on the key through the light-transmitting cover and the second through hole, thereby achieving a backlight effect.

[0007] Furthermore, the button includes a slider and a button cover that are snap-fitted together, the button cover is provided with a buckle at one end close to the slider, and the slider is provided with a first clamping block that is snap-fitted with the buckle at one end close to the button cover; the shell is provided with an annular positioning plate for forming the first through hole, the outer peripheral edge of the button cover is provided with an annular rib corresponding to the upper part of the annular positioning plate, and the lower part of the slider is provided with a limit baffle corresponding to the lower part of the annular positioning plate. Through the snap-fit ​​connection with the first clamping block, the slider and the button cover are connected as a whole; through the upper and lower limits of the annular rib and the limit baffle, the assembled button can be movably installed in the first through hole and can slide up and down along the first through hole, and the stroke of the button pressing and rebounding can also be controlled. Through the staggered cooperation of the slider, the annular rib of the button cover, and the annular positioning plate of the shell, it can prevent light from leaking out and block water outside the shell to prevent water from entering the switch.

[0008] Furthermore, the inner side wall of the first through hole is provided with a guide rib, the guide rib is distributed in a direction perpendicular to the PCBA circuit board, and the outer peripheral side wall of the slider is provided with a guide groove that slidably cooperates with the guide rib. Through the cooperation between the guide rib and the guide groove, the slider can smoothly and stably slide up and down along the first through hole, so as to realize the pressing and rebounding of the key.

[0009] Furthermore, the outer periphery of the silicone pad is provided with a peripheral edge with an annular protrusion, the peripheral edge and the silicone pad form a receiving groove for wrapping the PCBA circuit board, and the inner side wall of the peripheral edge is provided with a second clamping block clamped with the edge of the PCBA circuit board. Since the PCBA circuit board is wrapped in the receiving groove by the peripheral edge and fixed by the second clamping block, the upper surface of the PCBA circuit board is closed and coated, so that even if water enters the inside of the switch, the water will not contact the PCBA circuit board.

[0010] Furthermore, the housing comprises a shell and a bottom cover which are snap-fitted together, a first clamping hole is provided at the lower part of the shell, and a third clamping block matching the first clamping hole is provided at the bottom cover; the bottom cover and the shell jointly clamp the PCBA circuit board and the silicone pad. Through the cooperation of the first clamping hole and the third clamping block, the shell and the bottom cover are snap-fitted and spliced ​​into one; since the bottom cover and the shell clamp and press the silicone pad and the PCBA circuit board, water can be prevented from flowing into and contacting the PCBA circuit board.

[0011] Furthermore, the PCBA circuit board is provided with a foolproof hole, and the silicone pad is provided with a foolproof column corresponding thereto; the edge of the PCBA circuit board is provided with a positioning groove, and the bottom cover is provided with a positioning block corresponding to the positioning groove. Through the cooperation of the foolproof hole and the foolproof column, it is convenient to quickly and accurately cover the silicone pad on the PCBA circuit board; through the cooperation of the positioning groove and the positioning block, it is convenient to first position the PCBA circuit board with the silicone pad installed on the bottom cover, and then snap-fit ​​and connect it with the shell, thereby locking the PCBA circuit board.

[0012] Furthermore, the side wall of the housing is provided with a drainage hole. Thus, when water flows into the switch, it will eventually flow out of the switch through the drainage hole on the housing, thus avoiding water accumulation.

[0013] Furthermore, the silicone pad is provided with a second elastic silicone button perpendicular to the silicone pad, the second elastic silicone button includes a second pressing portion and a second elastic inclined wall distributed in an annular manner, the upper end of the second elastic inclined wall is connected to the second pressing portion, the lower end of the second elastic inclined wall is connected to the silicone pad, the second pressing portion and the second elastic inclined wall form a second elastic cavity with an opening facing downward, a balancing air guide groove is connected between the second elastic cavity and the first elastic cavity, and the button is provided with a touch block corresponding to the second elastic silicone button at one end close to the silicone pad. By additionally arranging a second elastic silicone button on the silicone pad, it can achieve a balanced force effect when the slider is triggered to turn on the two conductive disks by pressing the upper cover of the button, which is conducive to triggering the two conductive disks to turn on at the same time; by arranging a balancing air guide groove between the first elastic cavity and the second elastic cavity, it is more conducive to the bending and contraction of the first elastic inclined wall and the second elastic inclined wall after pressing the button, so that the first elastic silicone button and the second elastic silicone button can be pressed and rebounded more smoothly.

[0014] Furthermore, the double-contact silicone key switch also includes a decorative cover, the decorative cover is provided with a third through hole matching the key, the outer periphery of the decorative cover is provided with a second clamping hole, and the upper part of the housing is provided with a fourth clamping block matching the second clamping hole. Through the cooperation of the second clamping hole and the fourth clamping block, the decorative cover can be installed on the upper part of the housing, thereby covering and decorating the housing and achieving a good dustproof and waterproof effect.

[0015] Compared with the prior art, the utility model provides a double-contact silicone key switch, which has the following beneficial effects:

[0016] The utility model presses the button downward, and uses the touch block to press down the first elastic silicone button so that the two conductive contacts on the lower side are respectively in contact with the two conductive plates on the PCBA circuit board, thereby realizing the function of simultaneous conduction. The first conductive plate and the second conductive plate correspond to two circuits, and the switch function can be realized only when the two are simultaneously turned on; when only the first conductive plate is turned on or the second conductive plate is turned on, high and low level signals are generated between the two conductive plates, which is regarded as a false touch and the switch cannot be turned on. Due to the structural design of the double-contact silicone button, it is a double-key linkage, and pressing at the same time can realize the conduction of different circuits, which improves the stability and accuracy of the switch control, and has a good hand feel.

[0017] The double-contact silicone key switch of the utility model can be used for the opening control of the electric door of the car. When the key is pressed, the two conductive contacts located on the same elastic silicone key can respectively conduct the corresponding two conductive plates at the same time. In this way, the vehicle control system recognizes that it is a valid door opening operation, thereby automatically opening the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is an exploded view of the parts of the utility model;

[0021] Figure 3 It is an exploded view of parts from another perspective of the utility model;

[0022] Figure 4 It is a schematic diagram of a half-section structure of the utility model;

[0023] Figure 5 A schematic diagram of the connection between the housing and the slider in an upward perspective;

[0024] Figure 6 It is a schematic diagram of the assembly of the button cover, slider and shell;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the silicone pad at the first elastic silicone button;

[0026] Figure 8 is a schematic diagram of the cross-sectional structure of the silicone pad at the second elastic silicone button;

[0027] Fig. 9 This is a schematic diagram of the assembly of the silicone pad and the PCBA circuit board;

[0028] Fig.10 It is an assembly diagram of the utility model.

[0029] Figure numerals: 1, shell; 11, shell; 111, first through hole; 112, annular positioning plate; 113, guide rib; 114, first clamping hole; 115, drainage hole; 116, fourth clamping block; 12, bottom cover; 121, third clamping block; 122, positioning block; 2, PCBA circuit board; 21, first conductive plate; 22, second conductive plate; 23, LED lamp; 24, foolproof hole; 25, positioning groove; 3, silicone pad; 31, first elastic silicone button; 311, first pressing part; 312, first elastic inclined wall; 313, first elastic cavity; 314, conductive contact; 32 , light-transmitting cover; 33, surrounding edge; 34, accommodating groove; 35, second clamping block; 36, anti-fool column; 37, second elastic silicone button; 371, second pressing part; 372, second elastic inclined wall; 373, second elastic cavity; 38, balance air guide groove; 4, button; 41, slider; 411, touch block; 412, second through hole; 413, first clamping block; 414, limit baffle; 415, guide groove; 42, button cover; 421, light-transmitting part; 422, buckle; 423, annular rib; 5, decorative cover; 51, third through hole; 52, second clamping hole; 6, wiring harness; 7, plug. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly and completely described below through detailed embodiments and in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Please refer to Figures 1 to 10The present embodiment provides a double-contact silicone key switch, including a housing 1, a PCBA circuit board 2, a silicone pad 3 and a key 4, wherein the PCBA circuit board 2 is fixedly installed in the housing 1, the silicone pad 3 covers the PCBA circuit board 2, the housing 1 is provided with a first through hole 111 above the PCBA circuit board 2, the key 4 is slidably connected to the first through hole 111, the upper surface of the PCBA circuit board 2 is provided with a first conductive plate 21 and a second conductive plate 22, the silicone pad 3 is provided with a first elastic silicone key 31 perpendicular to the silicone pad, the first elastic silicone key 31 includes a first pressing portion 3 11 and a first elastic inclined wall 312 distributed in an annular manner, the upper end of the first elastic inclined wall 312 is connected to the first pressing portion 311, and the lower end of the first elastic inclined wall 312 is connected to the silicone pad 3, the first pressing portion 311 and the first elastic inclined wall 312 surround a first elastic cavity 313 with an opening facing downward, and the first pressing portion 311 is provided with two conductive contacts 314 corresponding to the first conductive plate 21 and the second conductive plate 22 on a side surface facing the first elastic cavity 313; the button 4 is provided with a touch block 411 corresponding to the first elastic silicone button 31 at one end close to the silicone pad 3. By pressing the button downward, the first elastic silicone button is pressed downward by the touch block so that the two conductive contacts on the lower side contact with the two conductive plates on the PCBA circuit board respectively, thereby realizing the function of simultaneous conduction. The first conductive plate and the second conductive plate correspond to two circuits, and the switch function can only be realized when the two are simultaneously turned on; when only the first conductive plate is turned on or the second conductive plate is turned on, a high and low level signal is generated between the two conductive plates, which is regarded as a false touch and the switch cannot be turned on. Due to the structural design of the double-contact silicone button, the two keys are linked, and pressing them at the same time can achieve conduction of different circuits, which improves the stability and accuracy of the switch control and has a better feel.

[0032] In some embodiments, reference Figure 1 to Figure 4 , Figure 6 , Fig. 9 and Fig.10 In order to quickly find the position of the switch even when the external light is insufficient, the PCBA circuit board 2 is provided with an LED lamp 23, the silicone pad 3 is provided with a light-transmitting cover 32 for covering the LED lamp 23, and the button 4 is provided with a second through hole 412 and a light-transmitting portion 421 corresponding to the light-transmitting cover 32. The light generated by the LED lamp can be irradiated to the light-transmitting portion on the button through the light-transmitting cover and the second through hole, thereby achieving a backlight effect.

[0033] In some specific embodiments, Figure 4 and Figure 6As shown, the button 4 includes a slider 41 and a button cover 42 that are snap-fitted together. The button cover 42 is provided with a buckle 422 at one end close to the slider 41, and the slider 41 is provided with a first clamping block 413 that is snap-fitted and connected with the buckle 422 at one end close to the button cover 42; the housing 1 is provided with an annular positioning plate 112 for forming the first through hole 111, and an annular retaining edge 423 corresponding to the upper part of the annular positioning plate 112 is provided at the outer peripheral edge of the button cover 42, and a limit baffle 414 corresponding to the lower part of the annular positioning plate 112 is provided at the lower part of the slider 41. The slider and the button cover are connected as one by the buckle and the first clamping block; the assembled button can be movably installed in the first through hole through the upper and lower limits of the annular retaining edge and the limit baffle, and the key can also be controlled in terms of the stroke of pressing down and rebounding. The slider, the annular retaining edge of the button cover and the annular positioning plate of the shell are staggered to prevent light from leaking out and to block water outside the shell and prevent water from entering the switch.

[0034] As an improved implementation, Figure 5 and Figure 6 As shown, the inner side wall of the first through hole 111 is provided with a guide rib 113, and the guide rib 113 is distributed in a direction perpendicular to the PCBA circuit board 2, and the outer peripheral side wall of the slider 41 is provided with a guide groove 415 that slidably cooperates with the guide rib 113. Through the cooperation between the guide rib and the guide groove, the slider can smoothly and stably slide up and down along the first through hole, so as to realize the pressing and rebounding of the key.

[0035] In some specific embodiments, Fig. 9 As shown, the outer periphery of the silicone pad 3 is provided with a peripheral edge 33 with an annular protrusion distribution, and the peripheral edge 33 and the silicone pad 3 form a receiving groove 34 for wrapping the PCBA circuit board 2, and the inner side wall of the peripheral edge 33 is provided with a second clamping block 35 clamped with the edge of the PCBA circuit board 2. Since the PCBA circuit board is wrapped in the receiving groove by the peripheral edge and fixed by the second clamping block, the upper surface of the PCBA circuit board is closed and coated, so that even if water enters the inside of the switch, the water will not contact the PCBA circuit board.

[0036] In some specific embodiments, reference Figure 4 and Fig.10The housing 1 comprises a shell 11 and a bottom cover 12 which are snap-fitted together. The lower part of the shell 11 is provided with a first clamping hole 114, and the bottom cover 12 is provided with a third clamping block 121 which matches the first clamping hole 114. The bottom cover 12 and the shell 11 clamp the PCBA circuit board 2 and the silicone pad 3 together. Through the cooperation of the first clamping hole and the third clamping block, the shell and the bottom cover are clamped and spliced ​​into one. Since the bottom cover and the shell clamp and press the silicone pad and the PCBA circuit board, water can be prevented from flowing into and contacting the PCBA circuit board.

[0037] As an improved implementation, refer to Fig. 9 and Fig.10 The PCBA circuit board 2 is provided with a foolproof hole 24, and the silicone pad 3 is provided with a foolproof column 36 corresponding thereto; the edge of the PCBA circuit board 2 is provided with a positioning groove 25, and the bottom cover 12 is provided with a positioning block 122 corresponding to the positioning groove 25. Through the cooperation of the foolproof hole and the foolproof column, it is convenient to quickly and accurately cover the silicone pad on the PCBA circuit board; through the cooperation of the positioning groove and the positioning block, it is convenient to first position the PCBA circuit board with the silicone pad installed on the bottom cover, and then snap-fit ​​and connect it with the shell, thereby locking the PCBA circuit board.

[0038] As an improved implementation, refer to Figure 1 and Figure 6 The side wall of the housing 11 is provided with a drainage hole 115. In this way, when water flows into the switch, it will eventually flow out of the switch through the drainage hole on the housing to avoid water accumulation.

[0039] In some embodiments, reference Figure 2 to Figure 4 , Figure 7 to Figure 10The silicone pad 3 is provided with a second elastic silicone button 37 perpendicular to the silicone pad, the second elastic silicone button 37 includes a second pressing portion 371 and a second elastic inclined wall 372 distributed in a ring, the upper end of the second elastic inclined wall 372 is connected to the second pressing portion 371, and the lower end of the second elastic inclined wall 372 is connected to the silicone pad 3, the second pressing portion 371 and the second elastic inclined wall 372 form a second elastic cavity 373 with an opening facing downward, a balancing air guide groove 38 is connected between the second elastic cavity 373 and the first elastic cavity 313, and the button 4 is provided with a touch block 411 corresponding to the second elastic silicone button 37 at one end close to the silicone pad 3. By additionally arranging a second elastic silicone button on the silicone pad, it can balance the force when the upper cover of the button is pressed down to drive the slider to trigger the two conductive plates to conduct, which is conducive to triggering the two conductive plates to conduct at the same time; by arranging a balancing air guide groove between the first elastic cavity and the second elastic cavity, it is more conducive to the bending and contraction of the first elastic inclined wall and the second elastic inclined wall after pressing the button, so that the first elastic silicone button and the second elastic silicone button can be pressed and rebound more smoothly. Preferably, there are three touch blocks, two of which are located on one side of the second through hole and correspond to the two conductive contacts on the first elastic silicone button respectively, and the other touch block is located on the other side of the second through hole corresponding to the second elastic silicone button, and the light-transmitting cover corresponding to the LED light is located between the first elastic silicone button and the second elastic silicone button. By distributing the touch blocks on both sides separately and distributing the first elastic silicone button and the second elastic silicone button on both sides of the light-transmitting cover, the structural space distribution is reasonable and conducive to force balance.

[0040] In some embodiments, reference Figures 1 to 10 The double-contact silicone key switch further comprises a decorative cover 5, the decorative cover 5 is provided with a third through hole 51 matching the key 4, the outer periphery of the decorative cover 5 is provided with a second clamping hole 52, and the upper part of the housing 1 is provided with a fourth clamping block 116 matching the second clamping hole 52. Through the cooperation between the second clamping hole and the fourth clamping block, the decorative cover can be installed on the upper part of the housing, thereby covering and decorating the housing and achieving a better dustproof and waterproof effect.

[0041] In some specific embodiments, reference Figure 1 to Figure 5 , Fig. 9 The PCBA circuit board 2 is connected to a wiring harness 6 , and a plug 7 is connected to the end of the wiring harness 6 .

[0042] The double-contact silicone key switch of the utility model can be used for opening control of electric doors of automobiles. Figure 4When the button is pressed down, the two conductive contacts on the same elastic silicone button can simultaneously conduct the corresponding two conductive plates. In this way, the vehicle control system recognizes that it is a valid door opening operation and automatically opens the door. In addition, the light generated by the LED lamp can be irradiated to the light-transmitting part on the button through the light-transmitting cover and the second through hole, thereby achieving a backlight effect, making it easy to quickly find the position of the switch in a dark environment.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A double-contact silicone key switch, comprising a housing, a PCBA circuit board, a silicone pad and a key, wherein the PCBA circuit board is fixedly installed in the housing, the silicone pad covers the PCBA circuit board, the housing is provided with a first through hole above the PCBA circuit board, the key is slidably connected to the first through hole, and is characterized in that: A first conductive plate and a second conductive plate are provided on the upper surface of the PCBA circuit board, and a first elastic silicone button perpendicular to the silicone pad is provided on the silicone pad. The first elastic silicone button includes a first pressing portion and a first elastic inclined wall distributed in a ring. The upper end of the first elastic inclined wall is connected to the first pressing portion, and the lower end of the first elastic inclined wall is connected to the silicone pad. The first pressing portion and the first elastic inclined wall form a first elastic cavity with an opening facing downward. The first pressing portion is provided with two conductive contacts corresponding to the first conductive plate and the second conductive plate respectively on a side surface facing the first elastic cavity; the button is provided with a touch block corresponding to the first elastic silicone button at one end close to the silicone pad.

2. The double-contact silicone key switch according to claim 1, characterized in that: The PCBA circuit board is provided with an LED lamp, the silicone pad is provided with a light-transmitting cover for covering the LED lamp, and the button is provided with a second through hole and a light-transmitting portion corresponding to the light-transmitting cover.

3. The double-contact silicone key switch according to claim 2, characterized in that: The button includes a slider and a button cover that are snap-connected, the button cover is provided with a buckle at one end close to the slider, and the slider is provided with a first clamping block that is snap-connected to the buckle at one end close to the button cover; the shell is provided with an annular positioning plate for forming the first through hole, the outer peripheral edge of the button cover is provided with an annular rib corresponding to the upper part of the annular positioning plate, and the lower part of the slider is provided with a limit baffle corresponding to the lower part of the annular positioning plate.

4. The double-contact silicone key switch according to claim 3, characterized in that: The inner side wall of the first through hole is provided with a guide rib, and the guide rib is distributed in a direction perpendicular to the PCBA circuit board. The outer peripheral side wall of the slider is provided with a guide groove that slidably cooperates with the guide rib.

5. The double-contact silicone key switch according to claim 1, characterized in that: The outer periphery of the silicone pad is provided with an annular protruding edge, the edge and the silicone pad form a receiving groove for wrapping the PCBA circuit board, and the inner side wall of the edge is provided with a second clamping block clamped with the edge of the PCBA circuit board.

6. The double-contact silicone key switch according to claim 1, characterized in that: The housing comprises an outer shell and a bottom cover which are snap-fitted together, a first clamping hole is provided at the lower part of the outer shell, and a third clamping block matching the first clamping hole is provided at the bottom cover; the bottom cover and the outer shell jointly clamp the PCBA circuit board and the silicone pad.

7. The double-contact silicone key switch according to claim 6, characterized in that: The PCBA circuit board is provided with anti-fool holes, and the silicone pad is correspondingly provided with anti-fool columns; the edge of the PCBA circuit board is provided with positioning grooves, and the bottom cover is provided with positioning blocks corresponding to the positioning grooves.

8. The double-contact silicone key switch according to claim 6, characterized in that: The side wall of the shell is provided with a drainage hole.

9. The double-contact silicone key switch according to claim 1, characterized in that: The silicone pad is provided with a second elastic silicone button perpendicular to the silicone pad, the second elastic silicone button includes a second pressing portion and a second elastic inclined wall distributed in a ring, the upper end of the second elastic inclined wall is connected to the second pressing portion, and the lower end of the second elastic inclined wall is connected to the silicone pad, the second pressing portion and the second elastic inclined wall form a second elastic cavity with an opening facing downward, a balancing air guide groove is connected between the second elastic cavity and the first elastic cavity, and the button is provided with a touch block corresponding to the second elastic silicone button at one end close to the silicone pad.

10. The double-contact silicone key switch according to any one of claims 1 to 9, characterized in that: It also includes a decorative cover, which is provided with a third through hole matching the button, a second clamping hole is provided on the periphery of the decorative cover, and a fourth clamping block matching the second clamping hole is provided on the upper part of the shell.

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