Self-locking normally-open and normally-closed button switch with reset function

Abstract

The utility model provides a self-locking normally-open and normally-closed button switch with a reset function, and belongs to the technical field of electric switches. The switch comprises a housing, a button, a self-locking assembly, a moving support, a pedestal, a moving contact, a static contact, an indicating lamp and a first spring, the self-locking assembly is arranged between the button and the moving support, the moving contact is arranged on the moving support, and the static contact is fixed on the pedestal; the self-locking assembly comprises a driving tooth, a limiting tooth and a transmission wheel, and a convex tooth structure is arranged on the periphery of the transmission wheel; the moving contacts comprise a group of first moving contacts and a group of second moving contacts, the static contacts comprise a group of first static contacts and a group of second static contacts, the first moving contacts are in contact with the first static contacts in a normal state, and the second moving contacts are separated from the second static contacts at the same time; the button is pressed downwards to drive the movable support to move downwards, so that the first movable contact is separated from the second movable contact, and meanwhile, the second movable contact is in contact with the second static contact. The button switch has sealing and waterproof performance, has a light indication function, and is stable in use performance.

Description

Technical Field

[0001] The utility model belongs to the field of button switch structure design, in particular to a self-locking and reset normally open and normally closed button switch. Background Art

[0002] A push button switch is a switch that uses a button to push a transmission mechanism to connect or disconnect the moving contact and the static contact and realize circuit switching. A push button switch is a simple structure and widely used main control electrical appliance. There are many types of push button switches, which can be divided into ordinary push button type, self-locking type, self-reset type, etc. The problems of traditional push button switches are: (1) poor sealing performance, easy entry of dust and rain, resulting in switch failure; (2) lack of light indication function, and the switch position cannot be found in a dark environment; (3) only a single normally open function or normally closed function, not both normally open and normally closed functions, which has limitations in actual use. Utility Model Content

[0003] The purpose of the utility model is to provide a push button switch to solve the problems pointed out in the above background technology.

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

[0005] The utility model provides a self-locking and reset normally open and normally closed button switch, comprising a hollow cylindrical shell, and a button, a self-locking component, a movable bracket, a base, a movable contact, a static contact, an indicator light and a first spring arranged in the shell, wherein the button can be moved up and down and is arranged in the upper part of the shell, the self-locking component is arranged between the button and the movable bracket, the movable contact is mounted on the movable bracket, the static contact is fixed on the base, and the first spring provides an upward elastic force for the movable bracket;

[0006] The self-locking assembly includes a driving tooth arranged at the bottom of the button, a limiting tooth arranged on the inner wall of the shell, and a transmission wheel installed below the button. The outer periphery of the transmission wheel is provided with a convex tooth structure, and the convex tooth structure cooperates with the driving tooth and the limiting tooth to achieve self-locking;

[0007] The moving contact includes a group of first moving contacts and a group of second moving contacts, and the stationary contact includes a group of first stationary contacts and a group of second stationary contacts. In normal state, the first moving contact is in contact with the first stationary contact, and the second moving contact is separated from the second stationary contact. Pressing the button downward drives the moving bracket to move downward to separate the first moving contact from the first moving contact, and the second moving contact is in contact with the second stationary contact.

[0008] In some embodiments, the convex tooth structure is not provided on the transmission wheel.

[0009] In some embodiments, the indicator light is mounted on the dynamic bracket, a lamp pin is fixed on the base and connected to an external power cord, the first spring is arranged between the base and the dynamic bracket, and the lamp pin and the indicator light are electrically connected through the first spring.

[0010] In some embodiments, the movable bracket is provided with a through hole extending in the up-down direction, the lead of the indicator light passes downward through the through hole and then bends to form a power connection pin, and the upper end of the first spring abuts against the power connection pin.

[0011] In some embodiments, the movable bracket is provided with a downward positioning column, the positioning column is provided with a fork, the power connection pin extends into the fork, and the upper end of the first spring is sleeved on the positioning column and contacts the power connection pin.

[0012] In some embodiments, a positioning tube is provided on the upper portion of the base, the lamp pin is provided at the bottom of the positioning tube, and the lower end of the first spring extends into the positioning tube and abuts against the lamp pin.

[0013] In some embodiments, the base is provided with an upwardly protruding plug post, and the movable bracket is movably sleeved on the plug post.

[0014] In some embodiments, the dynamic bracket is provided with a support column extending upward into the button, the indicator light is provided at the upper end of the support column, the transmission wheel is movably sleeved on the outer periphery of the support column, and the lower end of the transmission wheel abuts against the dynamic bracket.

[0015] In some embodiments, a shading sheet is fixed to the upper surface of the button, a hollow pattern is arranged on the shading sheet, and a light-transmitting rubber sleeve is arranged on the upper part of the shading sheet. The periphery of the light-transmitting rubber sleeve is pressed against the upper end of the outer shell by a screw sleeve, and the screw sleeve is screwed to the outer shell.

[0016] In some embodiments, a second spring is disposed inside the housing and around the outer periphery of the button, and the second spring provides an upward elastic force for the button.

[0017] The utility model has the following positive effects: (1) In the push button switch of the utility model, two groups of moving contacts and two groups of stationary contacts are provided. In the normal state, the first moving contact in the push button switch contacts with the first stationary contact (this circuit is in the on state), and the second moving contact separates from the second stationary contact (this circuit is in the off state). After the button is pressed, the first moving contact separates from the first stationary contact (this circuit is in the off state), and the second moving contact contacts with the second stationary contact (this circuit is in the on state). Thus, the push button switch can control two circuits at the same time, and has both normally open and normally closed functions, which can meet the needs of users and has good practicality. (2) In the push button switch of the utility model, the external power supply The line is connected to the power supply line, and the lamp foot is connected to the indicator light through the first spring that provides upward elastic force to the moving bracket, so that the indicator light remains on and is not affected by the on and off state of the switch, thereby playing a light indication role; (3) In the push button switch of the utility model, a shading sheet is fixed on the upper surface of the button, and a hollow pattern is provided on the shading sheet. The light emitted by the indicator light passes through the hollow pattern to show the corresponding pattern; a translucent rubber sleeve is provided on the upper part of the shading sheet, and the periphery of the translucent rubber sleeve is pressed against the upper end of the shell by a screw sleeve. The translucent rubber sleeve can block the gap between the shell and the button, thereby enhancing the waterproof and dustproof effect. The screw sleeve is screwed to the shell to facilitate assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a self-locking and reset normally open and normally closed push button switch in the utility model;

[0020] Figure 2 for Figure 1 A side view of a self-locking, reset-type normally open and normally closed push button switch shown in;

[0021] Figure 3 For along Figure 1 Sectional view cut along line AA;

[0022] Figure 4 It is a structural schematic diagram of the transmission wheel in the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the movable bracket of the utility model;

[0024] Figure 6It is an exploded view of the self-locking and reset normally open and normally closed push button switch in the utility model.

[0025] The reference numerals shown in the figure are: 1-housing; 2-button; 20-shading sheet; 21-first tooth portion; 22-translucent rubber sleeve; 3-movable bracket; 31-perforation; 32-positioning column; 33-support column; 34-bump; 4-base; 41-positioning cylinder; 42-insertion column; 5-moving contact; 6-static contact; 7-indicator light; 71-power connection pin; 8-first spring; 9-lamp pin; 10-transmission wheel; 10-convex tooth structure; 11-annular resistance portion; 12-screw sleeve; 13-second spring. DETAILED DESCRIPTION

[0026] 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.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] The button switch structure in the embodiment of the utility model is as follows Figures 1 to 6As shown, it includes a hollow cylindrical shell 1, and a button 2, a self-locking component, a moving bracket 3, a base 4, a moving contact 5, a static contact 6, an indicator light 7 and a first spring 8 arranged in the shell 1. The button 2 can be moved up and down and is arranged in the upper part of the shell 1. The self-locking component is arranged between the button 2 and the moving bracket 3. The moving contact 5 is installed on the moving bracket 3. The static contact 6 is fixed on the base 4. The first spring 8 provides an upward elastic force for the moving bracket 3. When the switch is installed and used, each static contact 6 is connected to the controlled circuit.

[0030] The self-locking component includes a driving tooth 21 arranged at the bottom of the button 2, a limiting tooth arranged on the inner wall of the shell 1 and a transmission wheel 10 installed below the button 2. The outer periphery of the transmission wheel 10 is provided with a convex tooth structure 101. The convex tooth structure 101 cooperates with the driving tooth 21 and the limiting tooth to achieve self-locking. Such an arrangement enables the button switch to have a state self-locking function, and the self-locking principle is similar to that of a press-type ballpoint pen. When the button switch is controlled, the button 2 is pressed and the movable bracket 3 is moved downward and then locked by the self-locking component, so that the button switch switches the state. After pressing the button 2 again, the self-locking component is unlocked, and the movable bracket 3 moves upward, thereby switching the button switch to the initial state.

[0031] In order to enable the button switch to control two circuits at the same time and have both normally open and normally closed functions, the moving contact 5 in this embodiment includes a group of first moving contacts and a group of second moving contacts, and the static contact 6 includes a group of first static contacts and a group of second static contacts. In normal state, the first moving contact is in contact with the first static contact, and the second moving contact is separated from the second static contact. Pressing the button 2 downward drives the moving bracket 3 to move downward to separate the first moving contact from the first moving contact, and the second moving contact is in contact with the second static contact.

[0032] As a modified implementation scheme, the convex tooth structure 101 is not provided on the transmission wheel 10. In this case, the self-locking function of the self-locking component fails due to the absence of the convex tooth structure 101. In this way, when the button 2 is pressed during use, the movable bracket 3 will be driven to move downward, thereby switching the switch state of the button switch. After the pressure applied to the button 2 is removed, the movable bracket 3 can be moved upward and reset in time, and the button switch returns to its initial state. In this way, in actual production, when the installed transmission wheel 10 has the convex tooth structure 101, the button switch has a self-locking function, and when the installed transmission wheel 10 does not have the convex tooth structure 101, the button switch is a self-resetting switch, and the remaining components can be used in common, thereby reducing production costs.

[0033] In some embodiments, the indicator light 7 is mounted on the moving bracket 3, a lamp foot 9 is fixed on the base 4 and the lamp foot 9 is connected to the external power line, the first spring 8 is arranged between the base 4 and the moving bracket 3, and the lamp foot 9 and the indicator light 7 are electrically connected through the first spring 8. When the push button switch is in use, the external power line is connected to the power supply line, and the lamp foot 9 and the indicator light 7 are connected by the first spring 8, so that the indicator light remains on and plays a light indication role; and when the moving bracket 3 moves up and down, the first spring 8 is correspondingly extended and contracted to ensure the electrical conduction performance. The first spring 8 can be made of, but not limited to, stainless steel.

[0034] Further, if Figure 3 As shown, in order to install the indicator light 7, a through hole 31 extending in the up-down direction is provided on the movable bracket 3, and the lead wire of the indicator light 7 passes downward through the through hole 31 and is bent to form an electrical connection pin 71, and the upper end of the first spring 8 abuts against the electrical connection pin 71. Such a configuration facilitates the electrical connection between the first spring 8 and the indicator light 7.

[0035] For further information, see Figure 3 and Figure 5 As shown, the movable bracket 3 is provided with a downward positioning column 32, and the positioning column 32 is provided with a fork, and the power connection pin 71 extends into the fork, and the upper end of the first spring 8 is sleeved on the positioning column 32 and contacts the power connection pin 71, so that the positioning column 32 can limit the upper end of the first spring 8, and the fork on the positioning column 32 can limit the power connection pin 71 to prevent the power connection pin 71 from shifting and affecting the electrical conduction performance.

[0036] like Figure 3 As shown, in order to increase the limitation of the lower end of the first spring 8, a positioning tube 41 is provided on the upper part of the base 4, and the lamp pin 9 is provided at the bottom of the positioning tube 41. The lower end of the first spring 8 extends into the positioning tube 41 and abuts against the lamp pin 9, thereby limiting the lower end of the first spring 8, ensuring the stability of the installation of the first spring 8, and being able to ensure the conductivity between the lower end of the first spring 8 and the lamp pin 9.

[0037] In order to facilitate the fixation of the base 4 in the shell 1, the base 4 is fixed to the bottom of the shell 1 in a snap-fit ​​manner; for example, a snap-fit ​​is provided on the side of the base 4, and a snap-fit ​​platform is provided on the inner wall of the shell 1, and the base 4 is fixed to the bottom of the shell 1 by snap-fitting the snap-fit ​​platform with the snap-fit.

[0038] In some embodiments, Figure 3 and Figure 6 As shown, the base 4 is provided with an upwardly protruding plug post 42 , and the movable bracket 3 is movably sleeved on the plug post 42 , so that the plug post 42 plays a role of guiding and limiting the movable bracket 3 .

[0039] In some embodiments, Figure 3 and Figure 6 As shown, the movable bracket 3 is provided with a support column 33 extending upward into the button 2, the indicator light 7 is arranged at the upper end of the support column 33, and the indicator light 7 is supported upward by the support body 33. The transmission wheel 10 is movably sleeved on the outer periphery of the support column 33, and the structure is reasonable.

[0040] More specifically, an annular resistance portion 11 is provided at the bottom of the transmission wheel 10, and the bottom of the annular resistance portion 11 is a downward arc-shaped convex surface, and upward protrusions 34 are evenly distributed on the upper edge of the movable bracket 3, and the top of the protrusion 34 is an upward arc-shaped convex surface. The annular resistance portion 11 abuts against the protrusion 34. In this way, the annular resistance portion 11 abuts against the arc-shaped convex surface on the protrusion 34, and the friction resistance during movement is small, so that the transmission wheel 10 is smoother and more flexible when rotating relative to the movable bracket 3.

[0041] like Figure 3 As shown, a shading sheet 20 is fixed on the upper surface of the button 2, and a hollow pattern is arranged on the shading sheet 20. The light emitted by the indicator light 7 passes through the hollow pattern to show the corresponding pattern. A light-transmitting rubber sleeve 22 is arranged on the upper part of the shading sheet 20. The periphery of the light-transmitting rubber sleeve 22 is pressed against the upper end of the shell 1 by a screw sleeve 12. The light-transmitting rubber sleeve 22 can seal the gap between the shell 1 and the button 2 to enhance the waterproof and dustproof effect. In order to facilitate assembly, the screw sleeve 12 is screwed to the shell 1.

[0042] In some embodiments, in order to enable the button 2 to move upward and reset in time after the pressure applied to the button 2 is removed, a second spring 13 is provided inside the housing 1. The second spring 13 is sleeved on the button 2. The upper and lower ends of the second spring 13 are respectively against the button 2 and the housing 1. In this way, the second spring 13 provides an upward elastic force for the button 2.

[0043] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A self-locking and reset normally open and normally closed push button switch, comprising a hollow cylindrical housing (1), a button (2), a self-locking component, a movable bracket (3), a base (4), a movable contact (5), a stationary contact (6), an indicator light (7) and a first spring (8) arranged in the housing (1), wherein the button (2) is arranged in an upper part of the housing (1) so as to be movable up and down, the self-locking component is arranged between the button (2) and the movable bracket (3), the movable contact (5) is mounted on the movable bracket (3), the stationary contact (6) is fixed on the base (4), and the first spring (8) provides an upward elastic force for the movable bracket (3); The self-locking component comprises a driving tooth (21) arranged at the bottom of the button (2), a limiting tooth arranged on the inner wall of the housing (1), and a transmission wheel (10) installed below the button (2); a convex tooth structure (101) is arranged on the outer periphery of the transmission wheel (10); and self-locking is achieved by the convex tooth structure (101) cooperating with the driving tooth (21) and the limiting tooth; It is characterized in that The moving contact (5) includes a group of first moving contacts and a group of second moving contacts, and the stationary contact (6) includes a group of first stationary contacts and a group of second stationary contacts. In a normal state, the first moving contact is in contact with the first stationary contact, and the second moving contact is separated from the second stationary contact. Pressing the button (2) downward drives the moving bracket (3) to move downward, so that the first moving contact is separated from the first moving contact, and the second moving contact is in contact with the second stationary contact.

2. The self-locking and reset normally open and normally closed push button switch according to claim 1, characterized in that: The convex tooth structure (101) is not provided on the transmission wheel (10).

3. The self-locking and reset normally open and normally closed push button switch according to claim 1, characterized in that: The indicator light (7) is mounted on the movable bracket (3); a lamp foot (9) is fixed on the base (4) and the lamp foot (9) is connected to an external power line; the first spring (8) is arranged between the base (4) and the movable bracket (3); the lamp foot (9) and the indicator light (7) are electrically connected via the first spring (8).

4. The self-locking and reset normally open and normally closed push button switch according to claim 3, characterized in that: The movable bracket (3) is provided with a through hole (31) extending in the up-down direction, the lead wire of the indicator light (7) passes downward through the through hole (31) and is bent to form an electrical connection pin (71), and the upper end of the first spring (8) abuts against the electrical connection pin (71).

5. The self-locking and reset normally open and normally closed push button switch according to claim 4, characterized in that: The movable bracket (3) is provided with a downward positioning column (32), the positioning column (32) is provided with a fork, the power connection pin (71) extends into the fork, and the upper end of the first spring (8) is sleeved on the positioning column (32) and contacts the power connection pin (71).

6. The self-locking and reset normally open and normally closed push button switch according to claim 3, characterized in that: A positioning tube (41) is provided on the upper part of the base (4), the lamp foot (9) is provided at the bottom of the positioning tube (41), and the lower end of the first spring (8) extends into the positioning tube (41) and abuts against the lamp foot (9).

7. The self-locking and reset normally open and normally closed push button switch according to claim 1, characterized in that: The base (4) is provided with an upwardly protruding plug post (42), and the movable bracket (3) is movably sleeved on the plug post (42).

8. The self-locking and reset normally open and normally closed push button switch according to claim 1, characterized in that: The movable bracket (3) is provided with a support column (33) extending upward into the interior of the button (2); the indicator light (7) is arranged at the upper end of the support column (33); the transmission wheel (10) is movably sleeved on the outer periphery of the support column (33); and the lower end of the transmission wheel (10) abuts against the movable bracket (3).

9. The self-locking and reset normally open and normally closed push button switch according to claim 1, characterized in that: A light shielding sheet (20) is fixed on the upper surface of the button (2), a hollow pattern is arranged on the light shielding sheet (20), and a light-transmitting rubber sleeve (22) is arranged on the upper part of the light shielding sheet (20), the periphery of the light-transmitting rubber sleeve (22) is pressed against the upper end of the outer shell (1) through a screw sleeve (12), and the screw sleeve (12) is screwed to the outer shell (1).

10. The self-locking and reset normally open and normally closed push button switch according to claim 1, characterized in that: A second spring (13) is sleeved on the outer circumference of the button (2) in the housing (1), and the second spring (13) provides an upward elastic force for the button (2).

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