Stable double-independent-loop touch switch

Abstract

The utility model relates to a touch switch, in particular to a stable double-independent-loop touch switch, which comprises a shell provided with a silica gel button, an inner button, a metal dome and a terminal pin are sequentially arranged in the shell relative to the lower position of the silica gel button, and an elastic reed matched with the terminal pin is arranged in the inner button. A pressing plate which presses the reed towards the direction of the terminal pin and is in linkage with the silica gel button in an abutting mode is arranged between the silica gel button and the inner button, and when the silica gel button is pressed downwards, the metal dome is squeezed through the inner button, and the reed is forced to be squeezed towards the terminal pin through transmission of the pressing plate so that electric connection between the reed and the terminal pin can be achieved. According to the utility model, the pressing plate is additionally arranged between the silica gel button and the inner button, when the silica gel button is pressed down, the pressing plate can assist the silica gel button to electrically connect the reed and the terminal pin, the time consistency of two loops is greatly improved, and the switch also has the characteristics of simple structure, convenience in processing and easiness in assembly, and is strong in practicability.

Description

Technical Field

[0001] This utility model relates to a tactile switch, and more particularly to a stable dual independent circuit tactile switch. Background Technology

[0002] A tactile switch is a common electronic component. Its operation is very simple; a light press connects or disconnects the circuit. A tactile switch consists of a spring, conductive material, and mechanical structure. When the button is pressed, the conductive material connects to the circuit. When the button is not pressed, the switch is in the open state, and signals cannot pass through the circuit. However, when the button is pressed, because the button is generally made of silicone, and due to the asymmetry of the left and right sides when pressed, the signal opening times of the two circuits are inconsistent. This is also the case in patent CN222851292U, entitled "A Multi-Circuit Tactile Switch." Improving the timing consistency of the two circuits is a technical problem we need to solve now. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a stable dual independent circuit tactile switch.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a stable dual independent circuit tactile switch, comprising a housing with a silicone button, characterized in that an inner button, a dome switch, and a terminal pin are sequentially arranged inside the housing and at a position below the silicone button. The inner button contains a spring with elastic properties that matches the terminal pin. A pressure plate is provided between the silicone button and the inner button to press the spring pin towards the terminal pin and to abut against the silicone button. When the silicone button is pressed down, the inner button squeezes the dome switch and, through transmission via the pressure plate, forces the spring pin towards the terminal pin to achieve an electrical connection between the spring pin and the terminal pin.

[0005] The pressure plate has a through hole at its center for the inner button to pass through, and the inner button achieves reciprocating motion at the through hole through the cooperation of the through hole.

[0006] The bottom of the pressure plate is provided with a protrusion that protrudes towards the spring, and the pressure plate applies pressure to the spring through the protrusion.

[0007] The end of the protrusion has a smooth curved surface structure.

[0008] The number of reeds is two, and the number of corresponding protrusions is two, and they are arranged symmetrically.

[0009] The housing is equipped with a limiting block to limit the pressure plate. The pressure plate achieves limited reciprocating motion within the housing through the cooperation of the limiting block.

[0010] The housing is provided with a mounting groove for fitting the hot plate. The bottom of the mounting groove and the position near the groove wall are provided with an arched part for supporting the outer edge of the hot plate. The bottom of the hot plate forms a gap space with the bottom of the groove through the cooperation of the arched part.

[0011] The arched portion includes a flange extending along the groove wall. The top of the flange is provided with several protruding posts for supporting the outer edge of the hot plate. The bottom of the hot plate forms a gap space with the bottom of the groove through the cooperation of the protruding posts.

[0012] The number of protruding pillars is four, and they are arranged symmetrically.

[0013] The bottom of the inner button has a protrusion that protrudes towards the dome.

[0014] The beneficial effects of this utility model are as follows: This utility model adds a pressure plate between the silicone button and the inner button. When the silicone button is pressed down, the pressure plate can assist the silicone button in making electrical connection between the spring and the terminal pin, which greatly improves the timing consistency of the two circuits. This utility model also has the characteristics of simple structure, convenient processing and easy assembly, and strong practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the base of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the pressure plate of this utility model.

[0020] In the diagram: 100, silicone button; 200, housing; 210, terminal pin; 220, limit block; 230, mounting groove; 240, arched part; 241, flange; 242, protruding post; 250, cover plate; 260, base; 300, inner button; 310, spring; 320, boss; 400, dome switch; 500, pressure plate; 510, through hole; 520, protrusion. Detailed Implementation

[0021] like Figures 1-5As shown, a stable dual independent circuit tactile switch includes a housing 200 housing a silicone button 100. Inside the housing 200, and below the silicone button 100, an inner button 300, a dome switch 400, and a terminal pin 210 are arranged sequentially. The inner button 300 has a spring 310 that engages with the terminal pin 210 and has elastic properties. Between the silicone button 100 and the inner button 300, there is a pressure plate 500 that applies pressure to the spring 310 towards the terminal pin 210 and abuts against the silicone button 100. When the silicone button 100 is pressed down, the inner button 300 squeezes the dome switch 400, and the pressure plate 500 forces the spring 310 to be squeezed towards the terminal pin 210, thus achieving an electrical connection between the spring 310 and the terminal pin 210. The housing 200 includes a cover plate 250 and a base 260, which are fixedly assembled by a snap-fit ​​method.

[0022] The pressure plate 500 has a through hole 510 at its center for the inner button 300 to pass through. The inner button 300 reciprocates at the through hole 510 through the cooperation of the inner button 300. The spring 310 has a certain elastic restoring force. When the silicone button 100 is pressed, the silicone button 100 can also be electrically connected to the spring 310 and the terminal pin 210 by pressing down through the inner button 300. After adding the pressure plate 500, since the pressure plate 500 can be made of rigid material, the corresponding left and right pressing times will be relatively consistent, the response time will be faster, and the practicality will be strong.

[0023] The bottom of the pressure plate 500 is provided with a protrusion 520 that protrudes towards the spring 310. The pressure plate 500 applies pressure to the spring 310 through the protrusion 520. The addition of the protrusion 520 makes the spring 310 contact the terminal pin 210 faster, resulting in better performance and strong practicality.

[0024] The end of the protrusion 520 is provided with a smooth curved surface structure, and the protrusion 520 is chamfered to improve the service life of the spring 310.

[0025] There are two springs 310 and two corresponding protrusions 520, which are arranged symmetrically. Generally, there are two sets of springs 310 and terminal pins 210, and two protrusions 520 are also set accordingly.

[0026] The housing 200 is provided with a limiting block 220 to limit the pressure plate 500. The pressure plate 500 achieves limited reciprocating motion within the housing 200 through the cooperation of the limiting block 220. The spring 310 has elastic restoring force. When the silicone button 100 is released, the pressure plate 500 moves towards the silicone button 100 mainly by the elastic restoring force of the spring 310 itself.

[0027] The housing 200 is provided with a mounting groove 230 for fitting the dome switch 400. The bottom of the mounting groove 230 and the position near the groove wall are provided with an arched part 240 for supporting the outer edge of the dome switch 400. The bottom of the dome switch 400 forms a gap space with the bottom of the groove through the cooperation of the arched part 240. The addition of this gap space can mainly increase the spring distance of the dome switch 400, thereby improving the elastic recovery force of the dome switch 400.

[0028] The arched portion 240 includes a flange 241 extending along the groove wall. The top of the flange 241 is provided with a plurality of protruding posts 242 for supporting the outer edge of the hot plate 400. The bottom of the hot plate 400 forms a gap space with the bottom of the groove through the cooperation of the protruding posts 242. The flange 241 and the protruding posts 242 form a high and low shape to prevent a vacuum at the bottom of the hot plate 400.

[0029] The number of protrusions 242 is four, and they are arranged symmetrically. Through multiple experiments and modifications, the number of protrusions 242 is preferably four, taking into account the processing difficulty and manufacturing cost.

[0030] The bottom of the inner button 300 is provided with a protrusion 320 that protrudes towards the dome 400. The protrusion 320 can better cooperate with the dome 400 and make the inner button 300 move downward faster.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Simple modifications and substitutions made by those skilled in the art without departing from the spirit and scope of this utility model are within its protection scope.

Claims

1. A stable dual independent circuit tactile switch, comprising a housing (200) housing a silicone button (100), characterized in that, An inner button (300), a dome switch (400), and a terminal pin (210) are sequentially arranged inside the housing (200) and below the silicone button (100). The inner button (300) has a spring (310) that matches the terminal pin (210) and has elastic properties. A pressure plate (500) is provided between the silicone button (100) and the inner button (300) to press the spring (310) toward the terminal pin (210) and to abut against the silicone button (100). When the silicone button (100) is pressed down, the inner button (300) squeezes the dome switch (400) and is driven by the pressure plate (500) to force the spring (310) toward the terminal pin (210) to achieve an electrical connection between the spring (310) and the terminal pin (210).

2. The stable dual independent circuit tactile switch as described in claim 1, characterized in that, The pressure plate (500) has a through hole (510) at its center for the inner button (300) to pass through. The inner button (300) achieves reciprocating motion at the through hole (510) through the cooperation of the through hole (510).

3. A stable dual independent circuit tactile switch as described in claim 2, characterized in that, The bottom of the pressure plate (500) is provided with a protrusion (520) that protrudes towards the spring (310), and the pressure plate (500) applies pressure to the spring (310) through the protrusion (520).

4. A stable dual independent circuit tactile switch as described in claim 3, characterized in that, The end of the protrusion (520) has a smooth curved surface structure.

5. A stable dual independent circuit tactile switch as described in claim 4, characterized in that, The number of reeds (310) is two, and the number of corresponding protrusions (520) is two, and they are arranged symmetrically.

6. A stable dual independent circuit tactile switch as described in claim 3, characterized in that, The housing (200) is provided with a limiting block (220) to limit the pressure plate (500). The pressure plate (500) achieves limited reciprocating motion within the housing (200) through the cooperation of the limiting block (220).

7. A stable dual independent circuit tactile switch as described in any one of claims 1 to 6, characterized in that, The housing (200) is provided with a mounting groove (230) for fitting the dome switch (400). The bottom of the mounting groove (230) and the position relative to the groove wall are provided with an arched part (240) for supporting the outer edge of the dome switch (400). The bottom of the dome switch (400) forms a gap space with the bottom of the groove through the cooperation of the arched part (240).

8. A stable dual independent circuit tactile switch as described in claim 7, characterized in that, The arched portion (240) includes a flange (241) extending along the groove wall. The top of the flange (241) is provided with a plurality of protrusions (242) for supporting the outer edge of the hot plate (400). The bottom of the hot plate (400) forms a gap space with the bottom of the groove through the cooperation of the protrusions (242).

9. A stable dual independent circuit tactile switch as described in claim 8, characterized in that, The number of the protruding pillars (242) is four, and they are arranged symmetrically.

10. A stable dual independent circuit tactile switch as described in claim 7, characterized in that, The bottom of the inner button (300) is provided with a boss (320) that protrudes towards the dome (400).

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