Short circuit prevention light touch switch

Abstract

The utility model discloses an anti-short-circuit light touch switch. According to the technical scheme, the wiring terminal comprises a base, a first wiring terminal and a second wiring terminal, the first wiring terminal and the second wiring terminal are arranged in the base, a positioning groove is formed in the end of the base, two first contacts are arranged on the inner side of the first wiring terminal, a second contact is arranged on the inner side of the second wiring terminal, the second contact is located between the first contacts, and the positioning groove is formed in the base. A first contact is arranged on the surface of the first contact, a second contact is arranged on the surface of the second contact, a metal dome is arranged in the positioning groove, the edge of the metal dome and the first contact are normally closed, the center of the metal dome and the second contact are normally open, and an isolation groove is formed in the position, corresponding to the position between the first contact and the second contact, of the base.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic component field, especially touch switch. BACKGROUND

[0002] Touch switch has the advantages of small contact resistance, accurate operating force error and diversified specifications, and is widely used in electronic equipment and white goods. The conventional touch switch has the disadvantage that when working in a high-temperature and high-humidity environment, the silver-plated terminal will be short-circuited due to silver migration caused by friction of the pot-shaped piece. SUMMARY

[0003] The utility model wants to solve the technical problem to provide a kind of short-circuit prevention touch switch.

[0004] To solve the above problems, the utility model adopts the technical scheme including: base and the first wiring terminal, second wiring terminal arranged in the base, the base is equipped with positioning groove, the first wiring terminal inside is equipped with two first contact, the second wiring terminal inside is equipped with one second contact, the second contact is between the first contact, the first contact surface is equipped with first contact point, the second contact surface is equipped with second contact point, the positioning groove is equipped with pot-shaped piece, the edge of the pot-shaped piece is normally closed with the first contact point, center and the second contact point is normally open, the base is equipped with isolation groove between the first contact and second contact, the base upper end is equipped with end cover, the end cover center is equipped with button for pressing the pot-shaped piece.

[0005] The short-circuit prevention touch switch is characterized in that: the positioning groove is equipped with step supporting the edge of the pot-shaped piece at both ends, and the step surface is flush with the first contact point.

[0006] The short-circuit prevention touch switch is characterized in that: the end face of the base is equipped with a cross-shaped sealing groove, and a waterproof film and a silica gel pad are sequentially arranged in the cross-shaped sealing groove.

[0007] The short-circuit prevention touch switch is characterized in that: the end cover bottom is equipped with a sealing protruding rib pressing the silica gel pad.

[0008] The short-circuit prevention touch switch is characterized in that: the bottom of the pot-shaped piece is equipped with a flat surface.

[0009] The short-circuit prevention touch switch is characterized in that: the base is connected with the end cover through riveting columns on four corners.

[0010] The short-circuit prevention touch switch has the following advantages: the isolation groove can block silver migration and prevent short circuit of two contact points. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model will be made further detailed illustration below combining with the drawing and specific embodiment.

[0012] Figure 1 It is the section view of the short-circuit prevention microswitch of the utility model;

[0013] Figure 2 It is the explosion view of the short-circuit prevention microswitch of the utility model;

[0014] Figure 3 It is the structure schematic view of the terminal of the utility model;

[0015] Figure 4 It is the structure schematic view of the pot piece of the utility model;

[0016] Figure 5 It is the structure schematic view of the end cover of the utility model;

[0017] Figure 6 It is the structure schematic view of the base of the utility model. Specific embodiment

[0018] As Figures 1 to 6 The utility model discloses a short-circuit prevention microswitch, including base 1 and being located in the first terminal 2 and second terminal 3 of the base 1. The upper end of the base 1 is equipped with the positioning recess 4, the inner side of the first terminal 2 is equipped with two first contacts 5, the inner side of the second terminal 3 is equipped with a second contact 6, and the second contact 6 is located between the first contact 5. The surface of the first contact 5 is equipped with the first contact point 7, and the surface of the second contact 6 is equipped with the second contact point 8. In order to improve the conductivity, the surface of the first contact point 7 and the second contact point 8 is usually plated with a silver layer. The positioning recess 4 is equipped with the pot piece 9, and the edge of the pot piece 9 is normally closed (contact) with the first contact point 7. The center of the pot piece 9 is normally open (separated) with the second contact point 8. The base 1 is equipped with the isolation recess 10 corresponding to the first contact 5 and the second contact 6, and the upper end of the base 1 is equipped with the end cover 11. The center of the end cover 11 is equipped with the button 12 for pressing the pot piece 9.

[0019] Preferably, the positioning recess 4 both ends are equipped with the step 13 of supporting the edge of the pot piece 9, and the surface of the step 13 is flush with the first contact point 7. So that the pot piece 9 can be more stably arranged in the positioning recess 4, and then the stability of the switch is improved.

[0020] Preferably, the end surface of the base 1 is equipped with the cross-shaped sealing groove 14, and the waterproof film 15 and the silica gel pad 16 are sequentially arranged in the cross-shaped sealing groove 14. In order to improve the waterproof performance of the switch.

[0021] Preferably, the bottom of the end cover 11 is provided with a sealing convex rib 17 pressing on the silica gel pad 16, so as to further improve the waterproof performance of the switch.

[0022] Preferably, the bottom of the pot piece 9 is provided with a plane 18, so as to improve the contact surface with the first contact 5, further improve the conductivity and stability, and reduce the abrasion on the first contact 5.

[0023] Preferably, the base 1 is connected with the end cover 11 through riveting columns 19 on four corners, so as to improve the connection strength.

[0024] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A short-circuit protected tactile switch, characterized in that: The device includes a base (1) and a first terminal (2) and a second terminal (3) disposed within the base (1). The upper end of the base (1) is provided with a positioning groove (4). The inner side of the first terminal (2) is provided with two first contacts (5). The inner side of the second terminal (3) is provided with a second contact (6). The second contact (6) is located between the first contacts (5). The surface of the first contact (5) is provided with a first contact point (7). The surface of the second contact (6) is provided with a second contact point (8). The positioning groove (4) is provided with a dome switch (9). The edge of the dome switch (9) is normally closed with the first contact point (7), and the center is normally open with the second contact point (8). The base (1) is provided with an isolation groove (10) between the first contact (5) and the second contact (6). The upper end of the base (1) is provided with an end cap (11). The center of the end cap (11) is provided with a button (12) for pressing the dome switch (9).

2. The short-circuit protection tactile switch according to claim 1, characterized in that: The positioning groove (4) has steps (13) at both ends to support the edge of the dome piece (9), and the surface of the steps (13) is flush with the first contact point (7).

3. The short-circuit protection tactile switch according to claim 1, characterized in that: The end face of the base (1) is provided with a cross-shaped sealing groove (14), and a waterproof membrane (15) and a silicone pad (16) are arranged in sequence in the cross-shaped sealing groove (14).

4. The short-circuit protection tactile switch according to claim 3, characterized in that: The end cap (11) has a sealing rib (17) at the bottom that applies pressure to the silicone pad (16).

5. The short-circuit protection tactile switch according to claim 1, characterized in that: The bottom of the pot dome (9) has a flat surface (18).

6. The short-circuit protection tactile switch according to claim 1, characterized in that: The base (1) is connected to the end cap (11) by riveting posts (19) at the four corners.

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