Double-loop touch switch

Abstract

The utility model provides a double-loop touch switch, which comprises a base, a cover plate, a button, four terminal pins and a metal reed, the button is partially pressed and fixed on the base by the cover plate, two terminal pins are combined to form a first group of terminals, the other two terminal pins are combined to form a second group of terminals, and the double-loop touch switch also comprises a metal reed, the part of the metal reed is normally contacted with one terminal pin of the first group of terminals, the metal reed is provided with a strip-shaped movable section, and the free end of the movable section extends to the other terminal pin close to the group of terminals; and the movable section of the metal reed is connected with an insulating transmission piece, a metal dome is arranged below the insulating transmission piece, the metal dome is locally and normally contacted with one terminal pin of the second group of terminals, and the other terminal pin of the second group of terminals partially extends to the lower part of the metal dome. The metal reed and the metal dome jointly generate elastic force for supporting, so that the touch switch has a double-circuit function and can assist the metal reed in springback, the springback effect is further guaranteed, and the service life of the product is longer.

Description

Technical Field

[0001] The utility model belongs to the technical field of switches, in particular to a double-circuit light-touch switch. Background Art

[0002] The applicant previously applied for a multi-circuit touch switch, and its publication number is CN117831979A. The patent application discloses a high-synchronicity multi-circuit touch switch. The switch uses two metal springs on a connecting plastic sheet to connect the circuit, and uses the metal springs themselves to disconnect the circuit. The connecting sheet is under the pot sheet, and only relies on the metal spring on the connecting sheet to reset. The material strength requirements of the metal spring are too high. Long-term operation will easily fatigue and the fracture resilience will become worse and worse, and eventually the function will fail. In addition, the pot sheet is on the connecting sheet, which only produces the functions of pressing, jumping and impact. The bending height of the connecting plastic sheet is too large, and the strength and life requirements of the metal material are too high. After the switch is operated for a long time, the bent metal contact foot is prone to fatigue, resulting in changes in the bending height or breakage, thereby making the switch function invalid. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to design a light touch switch to increase its service life.

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

[0005] A double-circuit touch switch comprises a base, a cover plate, a button and terminal pins, wherein the cover plate partially presses and fixes the button on the base, wherein there are four terminal pins, wherein two terminal pins are combined into a first group of terminals, and the other two terminal pins are combined into a second group of terminals, and further comprises a metal spring sheet, wherein a part of the metal spring sheet is in constant contact with one of the terminal pins of the first group of terminals, wherein a long strip-shaped movable section is provided on the metal spring sheet, and a free end of the movable section extends to another terminal pin close to the group of terminals; an insulating transmission member is connected to the movable section of the metal spring sheet, and a pot sheet is provided below the insulating transmission member, wherein a part of the pot sheet is in constant contact with one of the terminal pins of the second group of terminals, and another terminal pin of the second group of terminals is partially extended to below the pot sheet.

[0006] Preferably, a first groove for the metal spring to be embedded in is provided on the base, and both terminal pins of the first group of terminals extend into the first groove.

[0007] Preferably, the base is provided with a second groove for the insulating transmission part to be embedded and moved, and the pot piece and the insulating transmission part are arranged in the second groove, wherein the two terminal feet of the second group of terminals extend into the second groove, the second groove is located in the middle position of the base, and the first groove is arranged on the periphery of the second groove.

[0008] Preferably, the pot piece is a circular metal spring piece with a raised center.

[0009] Preferably, silver contacts are provided at the contact positions between the pot piece, the metal spring sheet and the terminal pin.

[0010] Preferably, the terminal pins are integrally injection-molded on the base.

[0011] Preferably, the button is made of silicone.

[0012] Preferably, the cover plate is buckled with the base.

[0013] Preferably, the portion of the metal spring sheet that is in constant contact with the first group of terminals is a flat surface without any bends, and the metal spring sheet is a square structure as a whole.

[0014] The beneficial effects of the utility model are as follows: the metal spring sheet and the pot sheet of the utility model jointly generate elastic force for support, which not only makes the touch switch have a dual-path function, but also can assist the metal spring sheet to rebound, further ensure the rebound effect, thereby extending the product life. The contact sheet of the utility model is flat and not bent. When it is in action, it is only slightly pre-pressed and bent to contact the convex point on the base. Even if it is operated for a long time at a high frequency, it will not be deformed. In addition, the square structure of the contact sheet can ensure stability, and there will be no excessive tilting to cause premature power-on contact. When it is not in action, even if one side is tilted, the other side will not be in contact, and the circuit will not be turned on prematurely. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the terminal pin of the utility model being located on the base;

[0018] Figure 4 This is a structural exploded view of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0020] Example

[0021] See also Figure 1-Figure 4 , as shown in the figure, a double-circuit touch switch includes a base 1, a cover plate 2, a button 3 and terminal pins. The cover plate 2 partially presses and fixes the button 3 on the base 1. In this embodiment, a buckling structure that buckles with the cover plate 2 is provided around the base 1, so that the cover plate 2 and the base 1 are directly buckled without screw fixation. Specifically, a clamping protrusion 11 is provided around the base 1, and a corresponding clamping portion 21 extending downward is provided on the cover plate 2. The clamping portion 21 is provided with a clamping groove 22. After the cover plate 2 is buckled with the base 1, the clamping protrusion 11 on the base 1 is clamped into the clamping groove 22 of the cover plate 2. In this embodiment, there are four terminal pins, which are in groups of two, two of which are combined into a first group of terminals 4, and the other two terminal pins are combined into a second group of terminals 5. It also includes a metal spring 6, which is partially in contact with one of the terminal pins of the first group of terminals 4. The metal spring 6 is provided with a long strip The movable segment 61 of the movable segment 61 extends to another terminal foot close to the group of terminals; the movable segment 61 of the metal spring sheet 6 is connected to an insulating transmission member 7, and a pot piece 8 is provided below the insulating transmission member 7. The pot piece 8 is partially in contact with one of the terminal feet of the second group of terminals 5, and the other terminal foot of the second group of terminals 5 partially extends to the bottom of the pot piece 8. In this embodiment, the insulating transmission member 7 is not only supported by the metal spring sheet 6 to support its reset, but also by the pot piece 8. Therefore, the pressure on the metal spring sheet 6 is reduced, thereby ensuring that the metal spring sheet 6 can have a longer service life. In this embodiment, the pot piece 8 is a circular metal spring sheet with a raised middle portion. The pot piece 8 is a common name in the industry. In this embodiment, the contact positions between the pot piece 8, the metal spring sheet 6 and the terminal foot are all provided with silver contacts to ensure the contact effect. The pot piece is under the contact piece. After the pot piece bounces, the connecting piece will follow and contact the protrusion on the base, thereby forming two power supply connections (one for the connecting piece and one for the pot piece). This makes full use of the elastic bouncing performance of the pot piece. As long as the pot piece is not broken, the product function can be kept intact. The movable section of the metal reed itself has a bouncing function, and together with the pot piece, the resetting effect can be better.

[0022] In this embodiment, the base 1 is provided with a first groove 12 for the metal spring 6 to be embedded, and the two terminal pins of the first group of terminals 4 are extended into the first groove 12. In this embodiment, the base 1 is a cube as a whole, and the first groove 12 is provided at an edge position close to the base 1. The base 1 is provided with a second groove 13 for the insulating transmission member 7 to be embedded and movable, and the pot piece 8 and the insulating transmission member 7 are provided in the second groove 13, wherein the two terminal pins of the second group of terminals 5 are extended into the second groove 13, the second groove is located in the middle position of the base 1, and the first groove is provided at the periphery of the second groove, and the first groove is connected with the second groove so that the movable section 61 of the metal spring 6 can pass through and move.

[0023] In this embodiment, the terminal pins are integrally injection-molded on the base 1 , and a portion of the terminal pins extends to the outside of the base 1 for wiring.

[0024] In order to make the switch waterproof and dustproof or more comfortable to press, the button 3 in this embodiment is designed to be made of silicone material. The button 3 made of silicone material is easier to pop out and has good sealing properties. It is tightly matched with the cover plate 2 and the base 1 to achieve the waterproof and dustproof effect.

[0025] The part of the metal spring sheet that is in constant contact with the first set of terminals is a flat plane without any bends, and the metal spring sheet is a square structure as a whole. The lack of bends improves strength and stability, and does not require bending during operation, and will not deform. When the first set of terminals are connected, only the active section of the metal spring sheet is slightly bent and in contact, and is not easily deformed. The square structure of the contact sheet will not contact the protrusions on the base in advance even if one side is tilted, and there will be no premature power-on. Moreover, the contact sheet is flat all around without any bends, and only the four corners are slightly pressed down to contact the protrusions on the base after operation, which increases the life of the contact sheet and simplifies the production process.

Claims

1. A dual-circuit touch switch, comprising a base, a cover, a button and terminal pins, wherein the cover partially presses and fixes the button on the base, the terminal pins are four, two of which are combined into a first group of terminals, and the other two are combined into a second group of terminals, characterized in that: It also includes a metal spring sheet, which is partially in contact with one of the terminal pins of the first group of terminals, and a long strip-shaped movable section is provided on the metal spring sheet, and the free end of the movable section extends to another terminal pin close to the group of terminals; the movable section of the metal spring sheet is connected to an insulating transmission member, and a pot piece is provided below the insulating transmission member, and the pot piece is partially in contact with one of the terminal pins of the second group of terminals, and the other terminal pin of the second group of terminals partially extends to the bottom of the pot piece.

2. A dual-circuit touch switch as claimed in claim 1, characterized in that: The base is provided with a first groove for the metal spring to be embedded in, and both terminal pins of the first group of terminals extend into the first groove.

3. A dual-circuit touch switch as claimed in claim 2, characterized in that: The base is provided with a second groove for the insulating transmission part to be embedded and move, the pot piece and the insulating transmission part are arranged in the second groove, wherein the two terminal feet of the second group of terminals extend into the second groove, the second groove is located in the middle position of the base, and the first groove is arranged on the periphery of the second groove.

4. A dual-circuit touch switch as claimed in claim 3, characterized in that: The pot piece is a circular metal spring piece with a raised center.

5. A dual-circuit touch switch as claimed in claim 1, characterized in that: Silver contacts are arranged at the contact positions between the pot piece, the metal spring sheet and the terminal pin.

6. A dual-circuit touch switch as claimed in claim 1, characterized in that: The terminal pins are integrally injection-molded on the base.

7. A dual-circuit touch switch as claimed in claim 1, characterized in that: The button is made of silicone.

8. A dual-circuit touch switch as claimed in claim 1, characterized in that: The cover plate is buckled with the base.

9. A dual-circuit touch switch as claimed in claim 1, characterized in that: The portion of the metal spring sheet that is in constant contact with the first group of terminals is a flat plane without any bends, and the metal spring sheet is a square structure as a whole.

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