Miniature touch switch

Abstract

The utility model discloses a miniature touch switch, which comprises a base and a button piece, a positive terminal piece and a negative terminal piece are embedded in the base, the button piece is covered at a concave cavity opening at the upper end of the base, a metal dome is arranged in the concave cavity opening at the upper end, grooves inclined inwards are arranged on the left side and the right side of the base, and the concave cavity opening at the upper end of the base is communicated with the grooves. A positive terminal pin of the positive terminal piece extends out of the base and is located on the upper sides of the grooves, and a negative terminal pin of the negative terminal piece extends out of one side of the base and is located between every two adjacent grooves. The miniature light touch switch can be directly welded with the end pins of the PCB at the groove of the base, so that the space of a bonding pad is effectively saved, the size of the miniature light touch switch is obviously reduced, the position occupied by the light touch switch on the PCB is reduced, and the circuit layout is convenient to optimize.

Description

Technical Field

[0001] This utility model relates to the field of electronic switch technology, and in particular to a miniature tactile switch. Background Technology

[0002] Consumer electronics products such as smartphones, wearable devices, and wireless headphones are rapidly evolving towards thinner, lighter, and smaller designs. To achieve richer functionality within limited space, the miniaturization and high-density integration of components have become an inevitable trend in the industry. As an indispensable component in electronic devices, the size and pad space of tactile switches directly affect the compactness of the overall design. The less space a tactile switch occupies on the PCB, the more space can be freed up for other components (such as sensors and chips), thus optimizing circuit layout. Therefore, we propose a miniature tactile switch. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a miniature tactile switch.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a miniature tactile switch, comprising a base and a button, wherein a positive terminal and a negative terminal are embedded in the base, the button is disposed on the upper recess of the base, a dome switch is disposed in the upper recess, and inwardly inclined grooves are provided on the left and right sides of the base, the positive terminal of the positive terminal extends from the base and is located on the upper side of the groove, and the negative terminal of the negative terminal extends from one side of the base and is located between two adjacent grooves.

[0005] To further elaborate, the button component is provided with a limiting cover on its upper part, the limiting cover having a central hole, the button part of the button component protruding from the central hole, the limiting cover having a buckle part on both sides, and the base having a buckle lug part that cooperates with the buckle part.

[0006] To elaborate further, the limiting cover is provided with limiting bending portions around its perimeter, and the buckle portion of the limiting cover is located between the two limiting bending portions.

[0007] To further elaborate, the button component has a cover plate portion, and a first pad portion is provided below the cover plate portion, and the first pad portion of the button component contacts the corner portion of the dome switch.

[0008] To further elaborate, the dome switch is disposed between the button and the positive terminal, and the positive terminal has a second pad corresponding to the first pad of the cover plate. The corner of the dome switch contacts the second pad of the positive terminal.

[0009] To elaborate further, the positive terminal piece is provided with a central receiving port, and the negative terminal piece is located at the central receiving port of the positive terminal piece.

[0010] The beneficial effects of this utility model are as follows: This utility model can directly solder the pins to the PCB circuit board at the groove of the base, thereby effectively saving solder pad space, significantly reducing the size of the miniature tactile switch, reducing the space occupied by the tactile switch on the PCB, and facilitating the optimization of circuit layout. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of this utility model.

[0013] Figure 3 This is an exploded view of the structure of this utility model.

[0014] Figure 4 This is a schematic diagram showing the relative positions between the positive and negative terminal subplates.

[0015] Figure 5 This is a structural diagram of the button component.

[0016] Reference numerals: 10. Base; 11. Upper recessed cavity; 12. Groove; 13. Buckle; 20. Button; 21. Cover plate; 22. First foot; 23. Center rod; 31. Positive end piece; 311. Positive end foot; 312. Second foot; 313. Center receiving opening; 32. Negative end piece; 321. Negative end foot; 40. Dome switch; 41. Corner of the switch; 50. Limiting cover; 51. Center hole; 52. Snap fastener; 54. Limiting bend; 55. Center groove. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] Combined with appendix Figure 1 To be continued Figure 3 As shown, a miniature tactile switch includes a base 10 and a button 20. A positive terminal 31 and a negative terminal 32 are embedded within the base 10. The relative positions of the positive terminal 31 and the negative terminal 32 on the base 10 are shown in the attached figure. Figure 4As shown, the button 20 is placed over the upper recess 11 of the base 10. The button 20 has a cover plate 21 that can completely cover the upper recess 11 of the base 10. A dome switch 40 is provided inside the upper recess 11. The dome switch 40 consists of three pieces. The four corners of the dome switch 40 have corner pieces 41. The corner pieces 41 can act as a support foot, thereby ensuring that the middle spring piece of the dome switch 40 is in a pressable and deformable state when naturally placed.

[0019] Combined with appendix Figure 1 and attached Figure 2 As shown, the base 10 has inwardly inclined grooves 12 on both sides. The positive terminal 311 of the positive terminal 31 extends from the base 10 and is located on the upper side of the groove 12. The negative terminal 321 of the negative terminal 32 extends from one side of the base 10 and is located between two adjacent grooves 12. When the tactile switch is soldered to the PCB board, the positive terminal 311 of the tactile switch can be soldered to the PCB board at the groove 12, thereby effectively saving solder pad space and significantly reducing the size of the miniature tactile switch.

[0020] Combined with appendix Figure 2 and attached Figure 3 As shown, a limiting cover 50 is provided above the button component 20. The limiting cover 50 has a central hole 51 through which the button part of the button component 20 protrudes. The limiting cover 50 has latching parts 52 on both sides, and the base 10 has latching ears 13 that cooperate with the latching parts 52. Limiting bending parts 54 are provided around the limiting cover 50, and the latching parts 52 of the limiting cover 50 are located between the two limiting bending parts 54. During installation, the limiting cover 50 is directly fastened onto the top of the button component 20. The latching parts 52 of the limiting cover 50 are latched and connected to the latching ears 13 of the base 10, and the limiting cover 50 directly presses against the cover plate part 21 of the button component 20, thereby achieving the installation and fixation of the button component 20 at the miniature tactile switch.

[0021] Combined with appendix Figure 3 To be continued Figure 5 As shown, a first foot portion 22 is provided below the cover plate portion 21, and the first foot portion 22 of the button component 20 contacts the corner portion 41 of the dome switch 40. The dome switch 40 is disposed between the button component 20 and the positive terminal piece 31. The positive terminal piece 31 has a second foot portion 312 corresponding to the first foot portion 22 of the cover plate portion 21, and the corner portion 41 of the dome switch 40 contacts the second foot portion 312 of the positive terminal piece 31. The positive terminal piece 31 has a central receiving opening 313, and the negative terminal piece 32 is disposed at the central receiving opening 313 of the positive terminal piece 31.

[0022] Combined with appendix Figure 3 and attached Figure 5As shown, when the button 20 is pressed down, the middle rod 23 of the button 20 presses down to contact the dome switch 40. The dome switch 40 undergoes elastic deformation and connects the positive terminal 31 and the negative terminal 32, thereby realizing the function of controlling the circuit to open and close.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0025] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the technical scope of this utility model.

Claims

1. A miniature tactile switch, comprising a base (10) and a button (20), wherein a positive terminal (31) and a negative terminal (32) are embedded in the base (10), and the button (20) is disposed at the upper recess (11) of the base (10), wherein a dome switch (40) is disposed in the upper recess (11), characterized in that: The base (10) has inwardly inclined grooves (12) on its left and right sides. The positive end foot (311) of the positive end piece (31) extends from the base (10) and is located on the upper side of the groove (12). The negative end foot (321) of the negative end piece (32) extends from one side of the base (10) and is located between two adjacent grooves (12).

2. A miniature tactile switch according to claim 1, characterized in that: The button (20) is provided with a limiting cover (50) above it. The limiting cover (50) has a central hole (51). The button part of the button (20) passes through the central hole (51). The limiting cover (50) has a buckle part (52) on both sides. The base (10) has a buckle ear part (13) that cooperates with the buckle part (52).

3. A miniature tactile switch according to claim 2, characterized in that: The limiting cover (50) is provided with limiting bending portions (54) around its perimeter, and the buckle portion (52) of the limiting cover (50) is located between the two limiting bending portions (54).

4. A miniature tactile switch according to claim 1, characterized in that: The button component (20) is provided with a cover plate (21), and a first pad (22) is provided below the cover plate (21). The first pad (22) of the button component (20) is in contact with the corner (41) of the dome switch (40).

5. A miniature tactile switch according to claim 4, characterized in that: The dome switch (40) is located between the button (20) and the positive terminal (31). The positive terminal (31) has a second foot (312) corresponding to the first foot (22) of the cover plate (21). The corner (41) of the dome switch (40) is in contact with the second foot (312) of the positive terminal (31).

6. A miniature tactile switch according to claim 1, characterized in that: The positive terminal piece (31) is provided with a middle receiving port (313), and the negative terminal piece (32) is located at the middle receiving port (313) of the positive terminal piece (31).

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