Improved self-locking key switch

Abstract

The utility model relates to the field of self-locking type key switches, in particular to an improved self-locking type key switch which comprises a rubber head, the rubber head is connected with a rubber base in an embedded mode, the rubber base is connected with a rubber cover in an embedded mode, the rubber head penetrates through the top of the rubber cover, a notch is formed in the outer side of the rubber head, an arch-shaped contact piece is arranged in the notch, and the arch-shaped contact piece is connected with the rubber cover in an embedded mode. The two ends of the outer side of the arch-shaped contact piece are provided with contacts, when the arch-shaped contact piece moves up and down, the contacts at the two ends make contact with the terminals to form a switching loop, one side of the rubber head is provided with a pressing block, the bottom of the pressing block is of a V-shaped structure, the lower end of the pressing block is provided with a clamping block, and the clamping block is of a heart-shaped structure. And a lock pin rail is arranged at the bottom of the clamping block. According to the utility model, the unique arc-shaped appreciation-type contact sheets are adopted, so that the product is reliable in contact and longer in service life, and the problems that the direction needs to be fixed and the installation is easy to be wrong when a similar key switch is installed on a PCB are solved by adopting a staggered symmetrical circuit design.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of self-locking key switch, especially to an improved self-locking key switch. BACKGROUND

[0002] As a common control element in electronic equipment, key switch is widely used in various electrical and electronic equipment, such as household appliances, industrial control, lighting, etc. Self-locking key switch is a commonly used electrical connector on many mechanical devices or devices, which is used to control the on-off of the circuit. However, the self-locking structure inside the self-locking key switch on the market has the disadvantages of complex structure and poor reliability. As a result, the self-locking key switch has the disadvantage of short service life, and the traditional key switch needs to be fixed in a certain direction when the PCB is installed, which may cause the product to be installed in the wrong direction, resulting in product damage. SUMMARY

[0003] The improved self-locking key switch solves the existing problems.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: an improved self-locking key switch, comprising a rubber head, the rubber head is connected with a rubber seat, and the rubber seat is connected with a rubber cover, the rubber head penetrates the top of the rubber cover, the outer side of the rubber head is provided with a notch, the inner side of the notch is provided with an arc contact piece, and the outer side of the arc contact piece is provided with a contact point at both ends, when the arc contact piece moves up and down, the contact points at both ends contact the terminal to form a switching circuit, one side of the rubber head is provided with a pressing block, the bottom of the pressing block is V-shaped structure, the lower end of the pressing block is provided with a clamping block, the clamping block is heart-shaped structure, and the bottom of the clamping block is provided with a lock needle track.

[0005] Preferably, the rubber seat is internally provided with a guide column, the guide column is internally provided with a groove, the outer side of the guide column is sleeved with a spring, and the top end of the spring is connected with the bottom end of the rubber head in a resilient structure.

[0006] Preferably, the guide column is internally provided with a lock table, and the inner side of the lock table is internally provided with a lock needle, the top end of the lock needle is connected with the lock needle track, and the lock needle track is an inclined structure.

[0007] Preferably, the rubber seat is internally provided with a terminal groove, and the terminal groove is internally provided with a plurality of terminals with a cross-shaped top.

[0008] Preferably, the bottom end of the rubber cover is an inverted T-shaped structure, the outer side of the rubber seat is provided with a notch, and the notches of the rubber cover and the rubber seat are matched to form a rubber cover fixing structure.

[0009] The protruding block is fixedly installed in the notch of the rubber head, and the two ends of the arc-shaped contact sheet are in contact with the semicircular protruding structures on the two sides of the protruding block.

[0010] The utility model discloses the beneficial effects are:

[0011] 1、Each spare part adopts the mode of clamping to assemble, simple structure improves the efficiency of installation.

[0012] 2, the unique arc contact sheet of Xie formula makes the product contact reliable, and the life is longer.

[0013] 3, through the symmetric circuit design of interlaced solution fixed direction that similar key switch installs PCB needs, the problem of easy mistake. DRAWINGS

[0014] Figure 1 It is the structure schematic drawing of the utility model;

[0015] Figure 2 It is the rubber cover split structure schematic drawing of the utility model;

[0016] Figure 3 It is the integral structure split schematic drawing of the utility model;

[0017] Figure 4 It is another view structure schematic drawing of the integral split of the utility model;

[0018] Figure 5 It is the arc contact sheet contact schematic drawing of the utility model;

[0019] Figure 6 It is the circuit structure schematic drawing of the utility model.

[0020] Marked number in drawing: 1, rubber head;2, rubber cover;3, rubber seat;4, arc contact sheet;5, clamping block;6, pressing block;7, protruding block;8, spring;9, lock pin;10, lock table;11, terminal;12, guide column;13, contact;14, lock pin track. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0022] Refer to Figures 1-6The utility model provides a technical scheme: An improved self-locking key switch, which comprises a rubber head 1, the rubber head 1 is in a stepped square column structure, the rubber head 1 is embeddedly connected with a rubber seat 3, the rubber seat 3 is embeddedly connected with a rubber cover 2, the rubber head 1 penetrates the rubber cover 2, a notch is formed on the outer side of the rubber head 1, an arc contact piece 4 is arranged in the notch, contact points 13 are arranged on the outer side of the arc contact piece 4, when the arc contact piece 4 moves up and down, the contact points 13 at both ends are in contact with terminals 11 to form a switching circuit, a pressing block 6 is arranged on one side of the rubber head 1, the bottom of the pressing block 6 is in a V-shaped structure, a clamping block 5 is arranged at the lower end of the pressing block 6, the clamping block 5 is in a heart-shaped structure, and a lock needle track 14 is arranged at the bottom of the clamping block 5; a guide column 12 is arranged in the rubber seat 3, a hollow groove is formed in the guide column 12, a spring 8 is sleeved on the outer side of the guide column 12, and the top end of the spring 8 is connected with the bottom end of the rubber head 1 in a resilient structure; a lock platform 10 is arranged on one side of the guide column 12, and a lock needle 9 penetrates the lock platform 10, the top end of the lock needle 9 is connected with the lock needle track 14, and the lock needle track 14 is in an inclined structure; a terminal groove is formed in the rubber seat 3, and a plurality of terminals 11, which are in a cross-shaped structure, are embeddedly connected in the terminal groove; a protrusion 7 is arranged on the inner side of the arc contact piece 4, and the protrusion 7 is fixedly arranged in the notch of the rubber head 1, the arc contact piece 4 is in contact with semicircular protruding structures on both sides of the protrusion 7, the arc contact piece 4 has a unique arc contact mode, and the arc contact piece 4 is reliable and has a service life of 100,000 times, while a general key switch has a service life of only 10-30,000 times.

[0023] When the device is in operation, the rubber head 1 is pressed down, the rubber head 1 starts to move vertically downward, at this time, the rubber head 1 drives the spring 8 at the bottom to contract, and the lock needle 9 slowly moves upward through the inclined lock needle track 14, when the rubber head 1 is pressed to a certain distance, the lock needle 9 reaches the inside of the clamping block 5 in the heart-shaped structure through the lock needle track 14, and the pressing block 6 assists in fixing the lock needle 9, even if the rubber head 1 is released at this time, the rubber head 1 will not immediately return to the initial position due to the resilience of the spring 8, and the self-locking function is realized; in the process of pressing the rubber head 1, the rubber head 1 is continuously embedded with the rubber seat 3 at the bottom, the arc contact piece 4 in the notch on the outer side of the rubber head 1 is extruded on both sides by the protrusion 7, the contact points 13 on both sides of the arc contact piece 4 are connected with the plurality of terminals 11 in the rubber seat 3, and the purpose of power supply is achieved, when it is necessary to disconnect the switch, the user presses the rubber head 1 again, at this time, the lock needle 9 leaves the clamping block 5 and returns to the inside of the lock needle track 14, the arc contact piece 4 is disconnected with the terminals 11, the disconnection function is realized, and at the same time, the spring 8 is gradually released, it pushes the rubber head 1 to return to the initial position, and the reset unlocking function is realized.

[0024] Specifically, refer to Figure 4 , Figure 5As shown, when the arcuate contact piece 4 is pressed down, the two outer ends of the contact piece 4 contact the transverse bent portions of two of the terminals 11, and the outer edge of the arcuate contact piece 4 contacts the vertical portions of the two terminals 11, thereby forming a switching circuit.

[0025] With reference to Figure 1 The bottom end of the glue cover 2 is in an inverted T-shaped structure, and the outer side of the glue seat 3 is provided with a notch, and the notches of the glue cover 2 and the glue seat 3 are matched to form a glue cover fixing structure.

[0026] In the assembly of the device, the glue head 1 is first embedded and connected with the clamping groove arranged on the inner side of the glue seat 3, and then the glue cover 2 is embedded and connected with the clamping groove arranged on the outer side of the glue seat 3, so that the assembly of the device is completed.

[0027] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacements or changes according to the technical scheme and the concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. An improved self-locking push button switch comprising a rubber head (1), characterized in that: The rubber head (1) is embeddedly connected with a rubber seat (3), and the rubber seat (3) is embeddedly connected with a rubber cover (2), the rubber head (1) penetrates the top of the rubber cover (2), the outer side of the rubber head (1) is provided with a notch, the inside of the notch is provided with an arc contact piece (4), and the outer side of the arc contact piece (4) is provided with a contact (13) at both ends, when the arc contact piece (4) moves up and down, the contact (13) at both ends is in contact with the terminal (11) to form a switching circuit, one side of the rubber head (1) is provided with a pressing block (6), the bottom of the pressing block (6) is in V-shaped structure, and the lower end of the pressing block (6) is provided with a clamping block (5), the clamping block (5) is in heart-shaped structure, and the bottom of the clamping block (5) is provided with a lock needle track (14).

2. The improved self-locking push button switch according to claim 1, wherein: The inside of the rubber seat (3) is provided with a guide column (12), the inside of the guide column (12) is provided with a groove, and the outside of the guide column (12) is sleeved with a spring (8), and the top end of the spring (8) is connected with the bottom end of the rubber head (1) in a resilient structure.

3. The improved self-locking push button switch according to claim 2, wherein: The guide column (12) is provided with a lock table (10) on one side, and the inside of the lock table (10) is penetratedly connected with a lock needle (9), the top end of the lock needle (9) is connected with the lock needle track (14), and the lock needle track (14) is in inclined structure.

4. The improved self-locking push button switch according to claim 1, wherein: The inside of the rubber seat (3) is provided with a terminal groove, and the inside of the terminal groove is embeddedly connected with a plurality of terminals (11) with the top in cross-shaped structure.

5. The improved self-locking push button switch according to claim 1, wherein: The bottom end of the rubber cover (2) is in inverted T-shaped structure, the outside of the rubber seat (3) is provided with a notch, and the notches of the rubber cover (2) and the rubber seat (3) are matched to form a rubber cover fixing structure.

6. The improved self-locking push button switch according to claim 1, wherein: The inside of the arc contact piece (4) is provided with a protrusion (7), and the protrusion (7) is fixedly installed in the notch of the rubber head (1), and the both ends of the arc contact piece (4) are in contact with the semicircular protruding structures on both sides of the protrusion (7).

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