Lock-free key switch

Abstract

The utility model discloses a lock-free key switch which can effectively prevent short circuit, is smooth to press and reset, has a stable structure and has various wiring forms of lines. According to the technical scheme, the circuit breaker comprises a base, at least four pins arranged on the two sides of the base in a pairwise opposite mode, a key arranged in the base in an up-down sliding mode and a base cover covering the upper end of the base, a reset spring is arranged between the key and the base, flat static contacts are integrally formed at the upper ends of the pins, and the upper ends of the static contacts are connected with the base cover. Moving contacts matched with the static contacts are arranged on the two sides of the key, each moving contact comprises a connecting part, an elastic contact arm integrally formed on the connecting part and a moving contact point integrally formed at the front end of the elastic contact arm, and the moving contacts are arranged on the two sides of the key through insert injection molding of the connecting parts. A groove or a convex rib for isolation is arranged between the inner wall of the base and the static contact.

Description

Technical Field

[0001] The utility model belongs to the field of switches, and in particular relates to a lock-free key switch. Background Art

[0002] A push button switch is an electronic component switch, which consists of a base, a group of pins on both sides of the base, a button that can slide up and down in the base, and a base cover covering the upper end of the base. Moving contacts that cooperate with the static contacts for on / off are provided on both sides of the button, and a reset spring is provided between the button and the base. Push button switches are available in two types: self-locking and non-locking. Among them: the non-locking push button switch will reset immediately after the button is released after pressing the button hard. The disadvantages are: 1. The long-term friction between the moving contact and the static contact is easy to drop some metal powder, which can easily cause short lines between the pins; 2. The friction between the button and the base is large, which can easily lead to uneven pressing and resetting; 3. The overall stability of the switch is poor; 4. The wiring form of the route is single. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a non-locking key switch which can effectively prevent short wires, has smooth pressing and resetting, a stable structure and various wiring forms of routes.

[0004] To solve the above problems, the technical solution adopted by the utility model includes: a base, a group of at least four pins arranged on two sides of the base opposite to each other, a button arranged in the base and slidable up and down, and a base cover covering the upper end of the base, a reset spring is provided between the button and the base, and is characterized in that: the pin inserts are injection molded on two sides of the base, and a flat static contact is integrally formed at the upper end, and moving contacts cooperating with the static contact are provided on two sides of the button, and the moving contact includes a connecting part, an elastic contact arm integrally formed on the connecting part, and a moving contact point integrally formed at the front end of the elastic contact arm, and the moving contact is injection molded on two sides of the button through the connecting part insert and is on / off matched with the static contact through the moving contact point.

[0005] The lock-free push button switch is characterized in that a groove or a convex rib for isolation is provided between the inner wall of the base and the static contacts.

[0006] The lock-free key switch is characterized in that guide grooves are provided on the four corners of the base, and guide ribs matching the guide grooves are provided on the four corners of the key.

[0007] The lock-free key switch is characterized in that a positioning column is provided at the center of the bottom of the base, a positioning hole is provided at the bottom of the key, and the reset spring is positioned by the positioning column and the positioning hole.

[0008] The lock-free push button switch is characterized in that a clearance groove is provided on the base corresponding to the root of the pin.

[0009] The lock-free push button switch is characterized in that: the base cover is hooked with the hooks on the two sides of the base through the buckles on both sides, and the side walls of the base cover are provided with positioning protrusions above the buckles corresponding to the positioning protrusions, and the two sides of the base are provided with positioning grooves that cooperate with the positioning protrusions.

[0010] The lock-free push button switch is characterized in that a reinforcing protrusion is provided in the middle of the pin.

[0011] The lock-free push button switch is characterized in that there are 6 pins, which are arranged opposite to each other in pairs, including a normally closed pin No. 1, a normally closed pin No. 2, and a normally open pin No. 3 arranged in sequence on one side of the base, and a normally open pin No. 4, a normally closed pin No. 5, and a normally closed pin No. 6 arranged in sequence on the other side of the base.

[0012] The lock-free push button switch is characterized in that the groove runs through the bottom of the base.

[0013] The lock-free push button switch is characterized in that: the top of the No. 1 normally closed foot and the No. 6 normally closed foot is provided with a first contact surface extending horizontally to one side, the top of the No. 2 normally closed foot and the No. 5 normally closed foot is provided with a second contact surface extending vertically downward, and the top of the No. 3 normally open foot and the No. 4 normally open foot is provided with a third contact surface with a notch.

[0014] The advantages of the lockless push button switch of the utility model are as follows: 1. A groove or convex rib for isolation is provided between the corresponding static contacts on the inner wall of the base, which can effectively prevent short wires between adjacent static contacts; 2. By reducing the contact surface between the button and the base, the friction force is reduced, and pressing and resetting are smoother; 3. Through the design of multiple positioning structures, the overall structure of the switch is more stable and reliable; 4. Through the arrangement and combination of 6 pins, a variety of normally closed and normally long connection methods can be realized to meet different wiring requirements.

[0015] The utility model is further described below in conjunction with the accompanying drawings of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the lock-free push button switch of the utility model;

[0017] Figure 2 It is an exploded view of the lock-free key switch of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the movable contact of the utility model;

[0019] Figure 4 This is a schematic diagram of the base structure with a groove structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the base structure with a convex rib structure of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the key of the utility model;

[0022] Figure 7 It is a schematic diagram of the structure of 6 pins of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the base cover of the utility model;

[0024] Fig. 9 This is the first wiring schematic diagram of the utility model;

[0025] Fig.10 This is the second wiring schematic diagram of the utility model;

[0026] Fig.11 This is the third wiring schematic diagram of the utility model;

[0027] Fig.12 This is the fourth wiring principle diagram of the utility model. DETAILED DESCRIPTION

[0028] Reference Figure 1-12 As shown, the lock-free push button switch of the utility model comprises a base 1, a group of at least four pins 2 arranged on two sides of the base 1 opposite to each other, a button 3 slidably arranged in the base 1, and a base cover 4 covering the upper end of the base 1, and a reset spring 5 is arranged between the button 3 and the base 1. A flat static contact 6 is integrally formed at the upper end of the pin 2, and a moving contact 7 cooperating with the static contact 6 is arranged on both sides of the button 3. The moving contact 7 comprises a connecting portion 8, an elastic contact arm 9 integrally formed on the connecting portion 8, and a moving contact 10 integrally formed at the front end of the elastic contact arm 9. The moving contact 7 is injection-molded on both sides of the button 3 through the connecting portion 8 to improve the connection strength between the moving contact 7 and the button 3. A groove 11 or a convex rib 12 for isolation is arranged between the inner wall of the base 1 and the static contact 6. When there are four pins 2, the static contact 6 can be normally closed (as shown in Figure 9) or normally open (as shown in Figure 9) with the moving contacts 10 on both sides. Fig.10 As shown), it can also be connected with the moving contact 10 on one side being normally closed and the moving contact 10 on the other side being normally open to meet different wiring needs of the market. Note: Insert injection molding is a conventional connection method between metal parts and plastic parts, not a new process.

[0029] Preferably, guide grooves 13 are provided at the four corners of the base 1, and guide ribs 14 are provided at the four corners of the key 3 to cooperate with the guide grooves 13. The guide ribs 14 are slidably matched with the guide grooves 13 to reduce the contact surface between the key and the base, so that the friction force becomes smaller, and the pressing and resetting are smoother, while ensuring stability.

[0030] Preferably, a positioning column 15 is provided at the bottom center of the base 1 , a positioning hole 16 is provided at the bottom of the button 3 , and the reset spring 5 is positioned by the positioning column 15 and the positioning hole 16 to improve the installation stability of the reset spring 5 .

[0031] Preferably, the pin 2 is insert-molded on two sides of the base 1 to improve the installation strength of the pin 2. A reinforcing protrusion 24 is provided in the middle of the pin 2 to further improve the installation strength of the pin 2 and prevent it from loosening.

[0032] Preferably, the base 1 is provided with a clearance groove 19 corresponding to the root of the pin 2. After the clearance groove 19 is provided, the pin 2 can be bent in the horizontal direction, thereby realizing the patch installation (welding) of the non-locking key switch.

[0033] Preferably, the base cover 4 is connected to the hooks 21 on both sides of the base 1 through the buckles 20 on both sides, and the side wall of the base cover 4 is provided with a positioning protrusion 22 corresponding to the upper side of the buckle 20, and the base 1 is provided with a positioning groove 23 on both sides to be positioned and matched with the positioning protrusion 22. When the base cover 4 is connected to the hook 21 of the base 1 through the buckle 20, the positioning protrusion 22 is embedded in the positioning groove 23 to improve the stability of the connection of the base cover 4.

[0034] Preferably, the number of the pins 2 is 6 and they are arranged opposite to each other in pairs. The pins 2 include a No. 1 normally closed pin 25, a No. 2 normally closed pin 26, a No. 3 normally open pin 27 arranged in sequence on one side of the base 1, and a No. 4 normally open pin 28, a No. 5 normally closed pin 29, and a No. 6 normally closed pin 30 arranged in sequence on the other side of the base 1. When the switch is in the reset state, the moving contact 7 connects the No. 1 normally closed pin 25 and the No. 2 normally closed pin 26 and the No. 5 normally closed pin 29 and the No. 6 normally closed pin 30 respectively (such as Fig.11 As shown); after the switch is pressed, the moving contact 7 connects the No. 2 normally closed foot 26 and the No. 3 normally open foot 27 and the No. 4 normally open foot 28 and the No. 5 normally closed foot 29 respectively (as shown Fig.12As shown). Specifically: the top of the No. 1 normally closed pin 25 and the No. 6 normally closed pin 30 is provided with a first contact surface 31 extending horizontally to one side, the top of the No. 2 normally closed pin 26 and the No. 5 normally closed pin 29 is provided with a second contact surface 32 extending vertically downward, and the top of the No. 3 normally open pin 27 and the No. 4 normally open pin 28 is provided with a third contact surface 34 with a notch 33. The above structure is used to realize the normally closed or normally open connection between the moving contact 7 and each pin, which has the advantages of simple structure and good reliability. Through the above wiring combination, many wiring changes can be realized to meet different wiring needs.

[0035] Preferably, the groove 11 runs through the bottom of the base 1 , so that the accumulated water in the base 1 can be discharged.

[0036] As mentioned above, the present invention is not limited in any form. Although the present invention has been disclosed as a preferred implementation case as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the equivalent implementation cases of equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A non-locking key switch, comprising a base (1), a group of at least four pins (2) arranged on two sides of the base (1) opposite to each other, a key (3) arranged in the base (1) and slidable up and down, and a base cover (4) covering the upper end of the base (1), a return spring (5) is provided between the key (3) and the base (1), and is characterized in that: A flat static contact (6) is integrally formed at the upper end of the pin (2); movable contacts (7) cooperating with the static contact (6) are provided on both sides of the button (3); the movable contact (7) comprises a connecting portion (8), an elastic contact arm (9) integrally formed on the connecting portion (8), and a movable contact point (10) integrally formed at the front end of the elastic contact arm (9); the movable contact (7) is injection molded on both sides of the button (3) through the insert of the connecting portion (8).

2. The non-locking key switch according to claim 1, characterized in that: An isolation groove (11) or a convex rib (12) is provided between the inner wall of the base (1) and the static contact (6).

3. The non-locking key switch according to claim 1, characterized in that: The base (1) is provided with guide grooves (13) at four corners, and the key (3) is provided with guide ribs (14) matching the guide grooves (13) at four corners.

4. The non-locking key switch according to claim 1, characterized in that: A positioning column (15) is provided at the center of the bottom of the base (1), a positioning hole (16) is provided at the bottom of the button (3), and the return spring (5) is positioned by means of the positioning column (15) and the positioning hole (16).

5. The non-locking key switch according to claim 1, characterized in that: The base (1) is provided with a clearance groove (19) at the root of the pin (2) corresponding to the pin (2).

6. The non-locking key switch according to claim 1, characterized in that: The base cover (4) is connected to hooks (21) on two sides of the base (1) via buckles (20) on both sides, and a positioning protrusion (22) is provided on the side wall of the base cover (4) above the buckle (20), and positioning grooves (23) are provided on both sides of the base (1) to cooperate with the positioning protrusion (22).

7. The non-locking key switch according to claim 1, characterized in that: A reinforcing protrusion (24) is provided in the middle of the pin (2).

8. The non-locking key switch according to claim 1, characterized in that: The pins (2) are six in number and are arranged in pairs opposite to each other, including a normally closed pin No. 1 (25), a normally closed pin No. 2 (26), and a normally open pin No. 3 (27) arranged in sequence on one side of the base (1), and a normally open pin No. 4 (28), a normally closed pin No. 5 (29), and a normally closed pin No. 6 (30) arranged in sequence on the other side of the base (1).

9. The non-locking key switch according to claim 2, characterized in that: The groove (11) runs through the bottom of the base (1).

10. The non-locking key switch according to claim 8, characterized in that: The tops of the No. 1 normally closed foot (25) and the No. 6 normally closed foot (30) are provided with a first contact surface (31) extending horizontally to one side, the tops of the No. 2 normally closed foot (26) and the No. 5 normally closed foot (29) are provided with a second contact surface (32) extending vertically downward, and the tops of the No. 3 normally open foot (27) and the No. 4 normally open foot (28) are provided with a third contact surface (34) with a notch (33).

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