A waterproof micro switch

Abstract

The utility model relates to the field of microswitch, the utility model discloses a waterproof microswitch, include: casing, insulating button and pin subassembly, the lower end side of insulating button is equipped with trigger part, and the trigger part includes the trigger recess and non-trigger area that set gradually from top to bottom, and the pin subassembly includes common contact, normally closed contact and normally open contact, and the upper end of normally closed contact and normally open contact is equipped with normally closed contact point and normally open contact point respectively, and the upper end of common contact is equipped with elastic end, and the lower end of elastic end extends the setting along the direction of away from insulating button, and the one end of elastic end close to insulating button is abutted in trigger part, and the one end of elastic end away from insulating button is equipped with common contact point, and common contact point sets up between normally closed contact point and normally open contact point, when elastic end abuts at non-trigger area, common contact point abuts at normally closed contact point, when elastic end abuts in trigger recess inner wall, common contact point abuts at normally open contact point. Improved waterproof performance, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of micro switches, and in particular to a waterproof micro switch. Background Technology

[0002] A switch is an electronic component that can open a circuit, interrupt current, or divert current to another circuit. A microswitch is a type of switch that uses a contact mechanism that operates with a predetermined travel distance. It is enclosed in a housing and has an external actuator. Because of its small contact spacing, it is called a microswitch, also known as a sensitive switch. Microswitches are widely used in various aspects of daily life, such as in car door locks, to detect the lock's status (locked / unlocked / open).

[0003] Microswitches have a actuator rod that switches between normally open and normally closed contacts under external force. However, because the distance between the normally open and normally closed contacts is relatively small, and the copper sheets of the normally open and normally closed contacts are generally thin, they are prone to plastic deformation. Some actuator rods have a large stroke, and after long-term use, the distance between the normally open and normally closed contacts increases, leading to a reduction in lifespan.

[0004] Meanwhile, existing microswitches used in automotive door locks typically have a waterproof rubber sleeve added to the button to improve waterproofing. Since microswitches are installed in confined spaces, when water enters the installation area, the waterproof sleeve will be exposed to high temperature and humidity. Prolonged exposure to high humidity can cause the rubber material of the sleeve to oxidize and degrade, leading to a reduced lifespan.

[0005] Therefore, a waterproof micro switch was designed to improve waterproof performance and extend service life. Utility Model Content

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a waterproof micro switch, comprising:

[0007] A housing, wherein the housing has an internal cavity;

[0008] An insulating button, the lower end of which is slidably disposed inside a cavity, the upper end of which penetrates the housing and extends to the outside of the housing, and a trigger part is provided on the lower side of the insulating button, the trigger part including a trigger groove and a non-trigger area arranged sequentially from top to bottom;

[0009] A pin assembly, comprising a common contact, a normally closed contact, and a normally open contact, wherein the lower ends of the common contact, the normally closed contact, and the normally open contact penetrate the housing along the length of the housing and extend to the outside of the housing;

[0010] The normally closed contact and normally open contact are respectively provided with normally closed contact and normally open contact at their upper ends. The common contact is provided with an elastic end at its upper end. The lower end of the elastic end extends away from the insulating button. The end of the elastic end near the insulating button abuts against the trigger part. The end of the elastic end away from the insulating button is provided with a common contact. The common contact is located between the normally closed contact and the normally open contact.

[0011] When the elastic end abuts against the non-trigger area, the common contact abuts against the normally closed contact;

[0012] When the elastic end abuts against the inner wall of the trigger groove, the common contact abuts against the normally open contact.

[0013] Preferably, the upper end of the elastic end extends in the direction close to the insulating button.

[0014] Preferably, the waterproof micro switch further includes a waterproof rubber sleeve. An upper annular groove is formed at the upper end of the insulating button, and a lower annular groove is formed around the insulating button on the outer wall of the housing. The lower end of the waterproof rubber sleeve is disposed inside the annular groove, and the upper and lower ends of the waterproof rubber sleeve are respectively fitted into the upper and lower annular grooves. The waterproof rubber sleeve blocks and seals the gap between the button and the housing, preventing water from easily entering the housing when the button is pressed, thus extending its service life.

[0015] Preferably, the waterproof microswitch further includes a waterproof cover, the lower end of which is threaded to the upper end of the housing, and the upper end of which is fitted over the outside of the waterproof rubber sleeve. By covering most of the structure of the waterproof rubber sleeve with the waterproof cover, the main body of the waterproof rubber sleeve is enclosed inside the waterproof cover. During use, the waterproof cover and the waterproof rubber sleeve provide double waterproofing, extending the service life.

[0016] Preferably, the lower end of the waterproof cover is provided with a threaded hole, the outer wall of the housing is provided with an external thread that matches the threaded hole, and the plane on which the upper end face of the waterproof cover is located is located between the upper annular groove and the lower annular groove.

[0017] Preferably, the waterproof micro switch further includes a reinforcing block, the reinforcing block having a receiving groove adapted to the contour of the upper end of the common contact piece, the common contact piece being disposed in the receiving groove and maintaining contact with the inner wall of the receiving groove.

[0018] Preferably, the waterproof micro switch further includes a reinforcing frame, which is slidably disposed on the inner wall of the cavity. One end of the reinforcing frame is disposed on a reinforcing block, and the other end of the reinforcing frame is provided with a first protrusion and a second protrusion spaced apart. The first protrusion, normally closed contact, normally open contact, and second protrusion are arranged sequentially along the length direction of the housing, and the normally closed contact and normally open contact are respectively disposed on the first protrusion and the second protrusion. The common contact piece, normally closed contact, and normally open contact are positioned by the reinforcing block and the reinforcing frame.

[0019] Preferably, the longitudinal section and cross section of the trigger groove are both isosceles trapezoidal.

[0020] Preferably, the waterproof micro switch further includes an elastic element, which is sandwiched between the bottom of the cavity and the insulating button, and the elastic force applied by the elastic element to the insulating button is set along the height direction of the housing.

[0021] Preferably, the housing includes an outer shell and a base connected sequentially from top to bottom. The base has a positioning post in the middle for positioning the elastic element. The positioning post is disposed between the normally closed contact and the normally open contact. The upper surface of the base has a first positioning groove and a second positioning groove. The first positioning groove, the positioning post and the second positioning groove are arranged sequentially along the width direction of the housing. The normally closed contact and the normally open contact are respectively disposed inside the first positioning groove and the second positioning groove.

[0022] The beneficial effects of this utility model are as follows: A common contact is used as the driving element. When the button is pressed, it pushes open the common contact and switches to the normally open state. During use, the distance between the normally closed and normally open contacts remains constant, extending service life. When the button is released, the button and the common contact reset and switch to the normally closed state. Attached Figure Description

[0023] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of a waterproof micro switch provided in an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0026] Figure 3 This is a schematic diagram of the structure of a normally closed contact provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a normally open contact provided in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the assembly of the reinforcing block and the reinforcing frame according to an embodiment of the present invention;

[0029] The markings in the diagram are: 1: Housing; 2: Insulated button; 3: Waterproof rubber sleeve; 4: Waterproof cover; 5: Reinforcing block; 6: Reinforcing frame; 7: Common contact piece; 8: Normally closed contact piece; 9: Normally open contact piece; 71: Elastic end; 72: Common contact; 81: Normally closed contact; 91: Normally open contact; 10: Triggering part. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0031] It should be noted that, in this utility model, unless otherwise stated, when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or an intervening element may be present simultaneously. When an element is referred to as "connected to" another element, it can be directly connected to the other element or an intervening element may be present simultaneously. The directional terms used, such as "up," "down," "left," and "right," generally refer to... Figure 1 The directions shown are up, down, left, and right. "Inner" and "outer" refer to the inner and outer parts of a specific outline. "Far" and "near" refer to the distance or proximity relative to a particular component.

[0032] like Figures 1-5 As shown in the figure, an embodiment of the present invention provides a waterproof micro switch, comprising:

[0033] Housing 1, wherein the housing 1 has an internal cavity;

[0034] An insulating button 2 is provided, the lower end of which is slidably disposed inside the cavity, the upper end of which penetrates the housing 1 and extends to the outside of the housing 1, and a trigger part 10 is provided on the lower side of the insulating button 2, the trigger part 10 including a trigger groove and a non-trigger area arranged sequentially from top to bottom;

[0035] The pin assembly includes a common contact 7, a normally closed contact 8, and a normally open contact 9. The lower ends of the common contact 7, the normally closed contact 8, and the normally open contact 9 penetrate the housing 1 along the length of the housing 1 and extend to the outside of the housing 1.

[0036] The normally closed contact 8 and normally open contact 9 are respectively provided with normally closed contact 81 and normally open contact 91 at their upper ends. The common contact 7 is provided with an elastic end 71 at its upper end. The lower end of the elastic end 71 extends away from the insulating button 2. The end of the elastic end 71 near the insulating button 2 abuts against the trigger part 10. The end of the elastic end 71 away from the insulating button 2 is provided with a common contact 72. The common contact 72 is located between the normally closed contact 81 and the normally open contact 91.

[0037] When the elastic end 71 abuts against the non-trigger area, the common contact 72 abuts against the normally closed contact 81;

[0038] When the elastic end 71 abuts against the inner wall of the trigger groove, the common contact 72 abuts against the normally open contact 91.

[0039] The upper end of the elastic end 71 extends in the direction close to the insulating button 2. The elastic end 71 is a V-shaped conductive metal sheet rotated 90°. The sharp part of the elastic end 71 keeps in contact with the trigger part 10, and the common contact 72 is located at the lower end of the elastic end 71. When the button moves up and down, the common contact 72 moves between the normally closed contact 81 and the normally open contact 91.

[0040] The waterproof microswitch also includes a waterproof rubber sleeve 3. An upper annular groove is formed at the upper end of the insulating button 2, and a lower annular groove is formed around the outer wall of the housing 1 surrounding the insulating button 2. The lower end of the waterproof rubber sleeve 3 is disposed inside the annular groove, and its upper and lower ends are respectively fitted into the upper and lower annular grooves. The waterproof rubber sleeve 3 seals the gap between the button and the housing 1, preventing water from easily entering the housing 1 when the button is pressed, thus extending its service life.

[0041] The waterproof microswitch also includes a waterproof cover 4, the lower end of which is threaded to the upper end of the housing 1, and the upper end of which is fitted over the outside of the waterproof rubber sleeve 3. The waterproof cover 4 conceals most of the structure of the waterproof rubber sleeve 3, enclosing the main body of the waterproof rubber sleeve 3 within it. This prevents the waterproof rubber sleeve 3 from oxidizing and degrading due to prolonged exposure to high humidity, thus extending its service life.

[0042] The waterproof micro switch also includes a reinforcing block 5, which has a receiving groove that matches the contour of the upper end of the common contact 7. The common contact 7 is disposed in the receiving groove and maintains contact with the inner wall of the receiving groove. The reinforcing block 5 is used to support the common contact 7, ensuring that when the button is pressed, only the elastic end 71 of the common contact 7 can move while the other parts remain stationary.

[0043] The waterproof micro switch also includes a reinforcing frame 6, which is slidably disposed on the inner wall of the cavity. One end of the reinforcing frame 6 is disposed on the reinforcing block 5, and the other end of the reinforcing frame 6 is provided with a first protrusion and a second protrusion spaced apart. The first protrusion, the normally closed contact 81, the normally open contact 91, and the second protrusion are arranged sequentially along the length direction of the housing 1. The normally closed contact 81 and the normally open contact 91 are respectively disposed on the first protrusion and the second protrusion. This arrangement also helps to maintain the shape of the common contact 7 and ensures its service life. The reinforcing frame 6 is used to support the normally closed contact 81 and the normally open contact 91, and the first protrusion and the second protrusion are used to support and fix the normally closed contact 81 and the normally open contact 91, respectively, so that the distance between the normally closed contact 81 and the normally open contact 91 remains constant.

[0044] The longitudinal and cross-sectional areas of the trigger groove are both isosceles trapezoids. The non-trigger area has a planar structure, and the edge of the trigger groove is coplanar with the plane containing the non-trigger area. The sidewalls of the trigger groove are all inclined to guide the elastic end 71.

[0045] The waterproof micro switch also includes an elastic element, which is sandwiched between the bottom of the cavity and the insulating button 2. The elastic force applied by the elastic element to the insulating button 2 is arranged along the height direction of the housing 1. The elastic element is a leaf spring or a spring, preferably a spring, and the lower end of the elastic element is sleeved on the outside of the positioning post.

[0046] Preferably, the housing 1 includes an outer shell and a base connected sequentially from top to bottom. The base has a positioning post in the middle for positioning the elastic element. The positioning post is disposed between the normally closed contact 8 and the normally open contact 9. The upper surface of the base has a first positioning groove and a second positioning groove. The first positioning groove, the positioning post and the second positioning groove are arranged sequentially along the width direction of the housing 1. The normally closed contact 8 and the normally open contact 9 are respectively disposed inside the first positioning groove and the second positioning groove.

[0047] In one embodiment, the waterproof cover 4 has a threaded hole at its lower end, and the outer wall of the housing 1 has an external thread that matches the threaded hole. The plane containing the upper end face of the waterproof cover 4 is located between the upper annular groove and the lower annular groove. The upper end of the waterproof cover 4 is rotatably fitted inside the upper annular groove. The waterproof cover 4 is made of plastic or metal. Replacing the waterproof rubber sleeve 3 with the waterproof cover 4 extends its service life.

[0048] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these should all be considered to be within the scope of this specification.

Claims

1. A waterproof micro switch, characterized in that: include: A housing, wherein the housing has an internal cavity; An insulating button, the lower end of which is slidably disposed inside a cavity, the upper end of which penetrates the housing and extends to the outside of the housing, and a trigger part is provided on the lower side of the insulating button, the trigger part including a trigger groove and a non-trigger area arranged sequentially from top to bottom; A pin assembly, comprising a common contact, a normally closed contact, and a normally open contact, wherein the lower ends of the common contact, the normally closed contact, and the normally open contact penetrate the housing along the length of the housing and extend to the outside of the housing; The normally closed contact and normally open contact are respectively provided with normally closed contact and normally open contact at their upper ends. The common contact is provided with an elastic end at its upper end. The lower end of the elastic end extends away from the insulating button. The end of the elastic end near the insulating button abuts against the trigger part. The end of the elastic end away from the insulating button is provided with a common contact. The common contact is located between the normally closed contact and the normally open contact. When the elastic end abuts against the non-trigger area, the common contact abuts against the normally closed contact; When the elastic end abuts against the inner wall of the trigger groove, the common contact abuts against the normally open contact.

2. The waterproof micro switch according to claim 1, characterized in that: The upper end of the elastic end extends in the direction close to the insulating button.

3. The waterproof micro switch according to claim 2, characterized in that: It also includes a waterproof rubber sleeve. The upper end of the insulating button has an upper annular groove, and the outer wall of the housing has a lower annular groove around the insulating button. The upper and lower ends of the waterproof rubber sleeve are respectively fitted into the upper annular groove and the lower annular groove.

4. The waterproof micro switch according to claim 3, characterized in that: It also includes a waterproof cover, the lower end of which is threaded to the upper end of the housing, and the upper end of which is fitted over the outside of the waterproof rubber sleeve.

5. The waterproof micro switch according to claim 4, characterized in that: The waterproof cover has a threaded hole at its lower end, and the outer wall of the housing has an external thread that matches the threaded hole. The plane on the upper end of the waterproof cover is located between the upper annular groove and the lower annular groove.

6. The waterproof micro switch according to claim 2, characterized in that: The waterproof micro switch also includes a reinforcing block, which has a receiving groove that matches the contour of the upper end of the common contact piece. The common contact piece is disposed in the receiving groove and keeps in contact with the inner wall of the receiving groove.

7. The waterproof micro switch according to claim 6, characterized in that: The waterproof micro switch also includes a reinforcing frame, which is slidably disposed on the inner wall of the cavity. One end of the reinforcing frame is disposed on a reinforcing block, and the other end of the reinforcing frame is provided with a first protrusion and a second protrusion spaced apart. The first protrusion, normally closed contact, normally open contact and second protrusion are arranged sequentially along the length direction of the housing. The normally closed contact and normally open contact are respectively disposed on the first protrusion and the second protrusion.

8. The waterproof micro switch according to claim 1, characterized in that: The longitudinal and cross sections of the trigger groove are both isosceles trapezoids.

9. The waterproof micro switch according to claim 1, characterized in that: The waterproof micro switch also includes an elastic element, which is sandwiched between the bottom of the cavity and the insulating button. The elastic force applied by the elastic element to the insulating button is set along the height direction of the housing.

10. The waterproof micro switch according to claim 9, characterized in that: The housing includes an outer shell and a base connected sequentially from top to bottom. The base has a positioning post in the middle for positioning the elastic element. The positioning post is disposed between the normally closed contact and the normally open contact. The upper surface of the base has a first positioning groove and a second positioning groove. The first positioning groove, the positioning post and the second positioning groove are arranged sequentially along the width direction of the housing. The normally closed contact and the normally open contact are respectively disposed inside the first positioning groove and the second positioning groove.

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