CN217386943U - Contact-stable self-locking switch - Google Patents

Abstract

The utility model relates to the technical field of switches, in particular to a self-locking switch with stable contact, which comprises a shell, a locking mechanism arranged on the shell and a key head movably connected on the shell, wherein both ends of the locking mechanism are respectively propped against the shell and the key head, the key head is in an unlocking state or an locking state through the locking mechanism, at least one elastic conducting strip is arranged on the key head, the elastic conducting strip comprises a first contact piece, a second contact piece and an elastic piece, contacts are respectively arranged on the first contact piece and the second contact piece, at least one terminal part is arranged on the shell, the terminal part comprises a first terminal, the contact is fully and correspondingly attracted with the contact surface through the elastic sheet, so that the problem of poor contact caused by elastic attenuation of the contact sheet in the use process is avoided.

Description

Self-locking switch with stable contact

Technical Field

The utility model belongs to the technical field of the switch technique and specifically relates to a contact stable self-locking switch is related to.

Background

A self-locking switch is a common button switch. When the switch button is pressed for the first time, the switch is switched on and kept, namely self-locking, and when the switch button is pressed for the second time, the switch is switched off, and meanwhile, the switch button is popped out.

At present, in some applications of the self-locking switch with three contacts, the elastic supporting points of the contact pieces are at the roots of the self-locking switch, and the elasticity is easy to attenuate in the use process, as shown in the figure I, the elastic supporting points of the contact points e on the contact piece a, the contact piece b and the contact piece c are at the roots of the respective contact pieces, after a product is heated, the elastic fatigue degrees of the contact piece a, the contact piece b and the contact piece c can be increased, so that the external tension of the contact piece a, the contact piece b and the contact piece c is easy to reduce, the elasticity is reduced, and poor contact of the self-locking switch is easy to occur; secondly, when the key head d is in an unlocking state, the contact piece a abuts against the terminal a ', the contact piece b abuts against the terminal b', the contact piece c is in a vacant state, the contact piece a and the contact piece b are elastically deformed, and the contact piece c is not elastically deformed; similarly, when the key head d is in a locking state, the contact piece b abuts against the terminal b ', the contact piece c abuts against the terminal c', the contact piece a is in an idle state, at the moment, the contact piece b and the contact piece c are elastically deformed, and the contact piece a is not elastically deformed, so that the respective stress of the contact piece a, the contact piece b and the contact piece c is uneven, after the self-locking switch is repeatedly used, slight elastic deformation can be generated among the contact piece a, the contact piece b and the contact piece c, and poor contact between the contact piece a and the terminal due to uneven stress of the contact piece a, the contact piece b and the contact piece c is easy to occur; in view of the above, there is a need to provide an improved solution to the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.

The utility model provides a contact stable self-locking switch, which comprises an outer shell, the key head of locking mechanical system and swing joint on the shell of setting on the shell, locking mechanical system's both ends are supported tightly with shell and key head respectively, the key head is in the state of unblanking or goes into the lock state through locking mechanical system, be equipped with at least one elastic conducting strip on the key head, elastic conducting strip is including first contact piece, second contact piece and shell fragment, all be equipped with the contact on first contact piece and the second contact piece, be equipped with at least one terminal part on the shell, the terminal part is including first terminal, second terminal and third terminal, first terminal, all be equipped with the terminal contact surface on second terminal and the third terminal, the contact passes through the shell fragment and fully corresponds the actuation with the terminal contact surface.

Preferably, the roots of the first contact piece and the second contact piece are fixedly mounted on the side wall of the key head and used for providing an elastic supporting point for the root of the elastic conducting piece, the elastic piece is located between the first contact piece and the second contact piece, and the elastic piece abuts against the side wall of the key head and is used for providing an elastic supporting point for the external tension of the elastic conducting piece.

Preferably, the elastic sheet is of a semicircular structure and is recessed towards the side wall of the key head, and the recessed plane abuts against the side wall of the key head to form an elastic supporting point of the elastic conducting sheet for external tension.

Preferably, a first terminal contact surface is arranged on the first terminal, a second terminal contact surface and a third terminal contact surface are arranged on the second terminal, a fourth terminal contact surface is arranged on the third terminal, the first terminal contact surface and the second terminal contact surface are located at the same horizontal position, the third terminal contact surface and the fourth terminal contact surface are located at the same horizontal position, the third terminal contact surface is located below the first terminal contact surface, and the fourth terminal contact surface is located below the second terminal contact surface.

Preferably, the shell is provided with a abutting frame and a sliding plate, the key head is provided with an abutting block corresponding to the abutting frame and a sliding block corresponding to the sliding plate, the sliding plate is in sliding fit with the sliding block, when the key head is in an unlocking state without external force, the abutting block abuts against the abutting frame, and the sliding block is arranged on one side wall adjacent to the elastic conducting strip.

Preferably, locking mechanical system is including spring and iron hook, and the both ends of spring are supported tightly with shell and button head respectively, the bottom of iron hook fixed mounting shell, and in the one end of iron hook stretched into the spring, the other end of iron hook and the spacing cooperation of button head.

Preferably, the key head is provided with a limiting groove in limiting fit with the iron hook, wherein the limiting groove is arranged on the side wall opposite to the sliding block.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) three contacts of the original three contact pieces are changed into two contacts of two contact pieces, and then four terminal contact surfaces corresponding to the two contacts of the two contact pieces are matched on the terminal part, so that the switching of the switch circuit of the utility model is not changed, namely, the electrical performance of the original switch is kept, and the elastic piece is additionally arranged between the two contact pieces, the two contact pieces are used as elastic supporting points at the root part of the elastic conducting piece, the elastic piece is used as the elastic supporting point of the external tension of the elastic conducting piece, namely, the external tension is structurally increased, so that the elastic deformation force can be respectively acted on the two contact pieces and the elastic piece when the elastic conducting piece is stressed, thereby reasonably decomposing the elastic deformation force, further counteracting the tension reduction at the positions of the two contact pieces when the furnace temperature is passed, and ensuring the contact stability after the furnace temperature of the self-locking switch with stable contact, thereby avoiding the problem of poor contact caused by elastic attenuation of the contact piece in the use process.

(2) When the key head is in an unlocking state, the first contact piece and the second contact piece are respectively abutted against the first terminal contact surface and the second terminal contact surface, the elastic piece is abutted against the side wall of the key head, when the key head is in an unlocking state, the first contact piece and the second contact piece are respectively abutted against the third terminal contact surface and the fourth terminal contact surface, and the elastic piece is abutted against the side wall of the key head.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a key head, contacts, contact pieces and terminals in a prior art self-locking switch;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is an exploded view of the structure of the present invention;

FIG. 4 is an enlarged schematic view at "A" in FIG. 3;

fig. 5 is a schematic cross-sectional view of the present invention;

fig. 6 is a schematic structural diagram of various embodiments of the present invention.

The reference numerals and names in the figures are as follows:

1. a housing; 2. a locking mechanism; 3. a key head; 4. an elastic conductive sheet; 5. a first contact pad; 6. a second contact piece; 7. a spring plate; 8. a contact; 9. a terminal portion; 10. a first terminal; 11. a second terminal; 12. a third terminal; 14. a first terminal contact surface; 15. a second terminal contact surface; 16. a third terminal contact surface; 17. a fourth terminal contact surface; 18. tightly abutting against the frame; 19. a slide plate; 20. a propping block; 21. a slider; 22. a spring; 23. an iron hook; 24. a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 2 to 5, in an embodiment of the present invention, a contact-stable self-locking switch includes a housing 1, a locking mechanism 2 disposed on the housing 1, and a key head 3 movably connected to the housing 1, wherein two ends of the locking mechanism 2 respectively abut against the housing 1 and the key head 3, the key head 3 is in an unlocking state or an locking state through the locking mechanism 2, the key head 3 is provided with at least one elastic conductive sheet 4, the elastic conductive sheet 4 includes a first contact sheet 5, a second contact sheet 6 and a spring sheet 7, the first contact sheet 5 and the second contact sheet 6 are both provided with contacts 8, the housing 1 is provided with at least one terminal portion 9, the terminal portion 9 includes a first terminal 10, the second terminal 11 and the third terminal 12, the first terminal 10, the second terminal 11 and the third terminal 12 are all provided with terminal contact surfaces, and the contact 8 is attracted with the terminal contact surfaces through the elastic sheet 7.

The roots of the first contact piece 5 and the second contact piece 6 are fixedly mounted on the side wall of the key head 3 and used for providing an elastic supporting point for the root of the elastic conducting piece 4, the elastic piece 7 is located between the first contact piece 5 and the second contact piece 6, and the elastic piece 7 abuts against the side wall of the key head 3 and is used for providing an elastic supporting point for the external tension of the elastic conducting piece 4.

The elastic sheet 7 is of a semicircular structure and is recessed towards the side wall of the key head 3, and the recessed plane is abutted against the side wall of the key head 3 to form an elastic supporting point of the elastic conducting sheet 4 for external tension.

The first terminal 10 is provided with a first terminal contact surface 14, the second terminal 11 is provided with a second terminal contact surface 15 and a third terminal contact surface 16, the third terminal 12 is provided with a fourth terminal contact surface 17, the first terminal contact surface 14 and the second terminal contact surface 15 are located at the same horizontal position, the third terminal contact surface 16 and the fourth terminal contact surface 17 are located at the same horizontal position, the third terminal contact surface 16 is located below the first terminal contact surface 14, and the fourth terminal contact surface 17 is located below the second terminal contact surface 15.

In the above technical means, when the key head 3 is in the unlocking state without external force, the first contact piece 5 abuts against the first terminal contact surface 14, the second contact piece 6 abuts against the second terminal contact surface 15, at this time, the first terminal contact surface 14 and the second terminal contact surface 15 respectively give the acting force of the first contact piece 5 and the second contact piece 6 approaching to the key head 3, so as to drive the elastic piece 7 to abut against the side wall of the key head 3 more tightly, because the elastic piece 7 is of a semicircular structure and is concave towards the side wall of the key head 3, the concave plane abuts against the side wall of the key head 3, so that the elastic piece 7 is elastically deformed, a reaction force moving towards the outward direction of the key head 3 is generated, and the first contact piece 5 and the second contact piece 6 are driven to approach to the first terminal contact surface 14 and the second terminal contact surface 15 respectively, thereby the first contact piece 5 and the second contact piece 6 abut against the first terminal contact surface 14 and the second terminal contact surface 15 respectively and further abut against the first terminal contact surface 15 Sufficiently adding so that the contacts 8 on the first contact piece 5 and the second contact piece 6 are respectively and correspondingly attracted with the first terminal contact surface 14 and the second terminal contact surface 15;

when external force is applied to make the key head 3 in the locked state, namely the key head 3 slides downwards on the shell 1, so that the first contact piece 5 abuts against the third terminal contact surface 16, the second contact piece 6 abuts against the fourth terminal contact surface 17, the spring piece 7 still abuts against the inner wall of the key head 3, in the same way as when the key head 3 is in the unlocked state without the action of external force, the third terminal contact surface 16 and the fourth terminal contact surface 17 respectively give the first contact piece 5 and the second contact piece 6 an acting force toward the key head 3, the elastic piece 7 gives the first contact piece 5 and the second contact piece 6 a reaction force moving toward the outside of the key head 3, thereby, the first contact piece 5 and the second contact piece 6 are made to abut against the third terminal contact face 16 and the fourth terminal contact face 17, respectively, more sufficiently, so that the contacts 8 on the first contact piece 5 and the second contact piece 6 are respectively and correspondingly attracted with the third terminal contact surface 16 and the fourth terminal contact surface 17;

the utility model discloses in, no matter be in the state of taking off the lock or go into the lock state according to button head 3, first contact piece 5 and second contact piece 6 all support simultaneously and lean on corresponding terminal contact surface, and the atress of first contact piece 5 and second contact piece 6 is even promptly, and the degree of the elastic deformation who takes place also is even to avoid appearing the contact piece on the elastic conducting strip 4 and lead to contact piece wherein and the problem emergence of terminal contact surface contact failure because of the atress is inhomogeneous. Furthermore, compare with the three contact of three contact piece among the prior art, the utility model discloses become two contacts of two contact pieces, rethread terminal portion is gone up and is matchd in first terminal contact surface 14 and the third terminal contact surface 16 of contact 8 on first contact piece 5, is matchd in second terminal contact surface 15 and the fourth terminal contact surface 17 of contact 8 on second contact piece 6, makes the utility model discloses switching circuit's switching does not change, keeps the electric property of former switch promptly, has increased shell fragment 7 between first contact piece 5 and second contact piece 6 moreover, and first contact piece 5 and second contact piece 6 are as the elastic support point of elasticity conducting strip 4 root, and shell fragment 7 is as the elastic support point of elasticity conducting strip 4 external tension, has increased external tension promptly structurally, and elasticity deformation can be used in first contact piece 5 respectively when making elasticity conducting strip 4 atress, The second contact piece 6 and the elastic piece 7 are used for reasonably decomposing the elastic deformation force, so that the tension reduction at the positions of the first contact piece 5 and the second contact piece 6 during the furnace temperature passing can be offset, the stability of contact can be ensured after the self-locking switch with stable contact passes the furnace temperature, and the problem of poor contact caused by elastic attenuation of the contact pieces in the using process is avoided.

The embodiment of the utility model provides an in, be equipped with on the shell 1 and support tight frame 18 and slide 19, be equipped with on the key head 3 and correspond to support tight piece 20 and the slider 21 that corresponds to slide 19 of supporting tight frame 18, slide 19 and slider 21 sliding fit, when no exogenic action is in the state of taking off the lock when the key head 3, support tight piece 20 and support tight frame 18 and support tightly, wherein, slider 21 sets up on a lateral wall adjacent with elastic conducting strip 4.

The locking mechanism 2 comprises a spring 22 and an iron hook 23, two ends of the spring 22 are respectively abutted against the shell 1 and the key head 3, the iron hook 23 is fixedly arranged at the bottom of the shell 1, one end of the iron hook 23 extends into the spring 22, and the other end of the iron hook 23 is in limit fit with the key head 3.

The key head 3 is provided with a limiting groove 24 in limiting fit with the iron hook 23, wherein the limiting groove 24 is arranged on the side wall opposite to the slide block 21.

In the above technical means, when the key head 3 is in the unlocked state without external force, two ends of the spring 22 respectively abut against the housing 1 and the key head 3, so that the abutting block 20 abuts against the abutting frame 18, the sliding plate 19 abuts against the sliding block 21, and one end of the iron hook 23 abuts against one end of the limiting groove 24; when external force is applied to enable the key head 3 to be in a locking state, namely the key head 3 slides downwards on the shell 1 by pressing the spring 22, at the moment, the abutting block 20 is separated from the abutting frame 18, the sliding block 21 slides downwards on the sliding plate 19, and the iron hook 23 is in spacing fit with the spacing groove 24 to enable the key head 3 to be limited, so that the locking state is achieved.

As shown in fig. 6, for the utility model discloses technical scheme's multiple embodiment, its different shapes that design according to shell 1, terminal part 9 and the product structure demand of key head 3 all can reach the utility model discloses produced technological effect among the technical scheme.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (7)

1. The utility model provides a self-locking switch that contact is stable, a serial communication port, which comprises an outer shell, locking mechanical system and swing joint key head on the shell of setting on the shell, locking mechanical system's both ends are supported tightly with shell and key head respectively, the key head is in the state of unblanking or locking-in state through locking mechanical system, be equipped with at least one elastic conducting strip on the key head, elastic conducting strip is including first contact piece, second contact piece and shell fragment, all be equipped with the contact on first contact piece and the second contact piece, be equipped with at least one terminal part on the shell, the terminal part is including first terminal, second terminal and third terminal, first terminal, all be equipped with the terminal contact surface on second terminal and the third terminal, the contact passes through the shell fragment and fully corresponds the actuation with the terminal contact surface.

2. The contact-stabilized self-locking switch according to claim 1, wherein the roots of the first contact piece and the second contact piece are fixedly mounted on the sidewall of the key head for providing an elastic supporting point for the root of the elastic conductive sheet, the elastic sheet is located between the first contact piece and the second contact piece, and the elastic sheet abuts against the sidewall of the key head for providing an elastic supporting point for the elastic conductive sheet to exert an external tension.

3. The contact-stabilized self-locking switch according to claim 2, wherein the resilient plate is a semi-circular structure and is recessed toward the sidewall of the key head, and the recessed surface abuts against the sidewall of the key head to form an elastic supporting point for the elastic conductive sheet to exert external tension.

4. The contact-stabilized self-locking switch according to claim 1, wherein the first terminal has a first terminal contact surface, the second terminal has a second terminal contact surface and a third terminal contact surface, the third terminal has a fourth terminal contact surface, the first terminal contact surface and the second terminal contact surface are at the same level, the third terminal contact surface and the fourth terminal contact surface are at the same level, the third terminal contact surface is located below the first terminal contact surface, and the fourth terminal contact surface is located below the second terminal contact surface.

5. The contact-stabilized self-locking switch according to claim 1, wherein the housing has a support frame and a slide plate, the key head has a support block corresponding to the support frame and a slide block corresponding to the slide plate, the slide plate is slidably engaged with the slide block, and the support block is supported by the support frame when the key head is in the unlocked state without external force, wherein the slide block is disposed on a side wall adjacent to the elastic conductive sheet.

6. The self-locking switch with stable contact according to claim 1, wherein the locking mechanism comprises a spring and an iron hook, two ends of the spring are respectively abutted against the housing and the key head, the iron hook is fixedly installed at the bottom of the housing, one end of the iron hook extends into the spring, and the other end of the iron hook is in limit fit with the key head.

7. The self-locking switch with stable contact according to claim 5 or 6, wherein the key head is provided with a limiting groove which is in limiting fit with the iron hook, wherein the limiting groove is arranged on the side wall opposite to the sliding block.

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