CN216562846U - Dustproof and waterproof microswitch - Google Patents

Abstract

The dustproof and waterproof microswitch comprises a base body, a button, a shell and a bottom shell, wherein the shell and the bottom shell are connected with the base body; a button through hole is formed in the shell, one end of the button is arranged in the box body, and the other end of the button extends out of the box body through the button through hole; a movable contact arm, a normally open static contact pin, a normally closed static contact pin, a movable contact arm bracket and a tension spring are arranged below the button; the normally open static contact pin, the normally closed static contact pin and the movable contact arm support are all connected to the base body, the movable contact arm is arranged on the movable contact arm support, one end of the tension spring is connected to the movable contact arm, and the other end of the tension spring is connected to the movable contact arm support; the movable contact arm is provided with a movable contact, the normally open static contact pin is provided with a normally open static contact, and the normally closed static contact pin is provided with a normally closed static contact.

Description

Dustproof and waterproof microswitch

Technical Field

The present disclosure relates to a microswitch, and more particularly, to a dustproof and waterproof microswitch.

Background

The microswitch on the market at present has the following functional defects:

1. common micro-gap switch does not have dustproof and waterproof function, and when using on utensil or outdoor garden instrument that have higher protection requirement to the switch, the switch is inside to get into dust and water easily, causes electrical short circuit easily, can cause the switch to burn out when serious, does not accord with GB15092.1 national safety standard, has great potential safety hazard to human life.

2. The common dustproof and waterproof microswitch has a complex process, the connection of the button sealing sleeve and the base body adopts an ultrasonic welding process, the process difficulty is high, the welding effect is difficult to control, and when the welding is insufficient, the joint is not tight, water leakage and dust leakage are easy to occur; when the welding is over-head, the sealing sleeve is easy to break, water and dust can be leaked, and the national safety standard is not met.

Therefore, a microswitch with the dustproof and waterproof functions is imperative.

SUMMERY OF THE UTILITY MODEL

According to a first aspect of the embodiments of the present disclosure, there is provided a dust-proof and water-proof microswitch, comprising a base body, a button, and a housing and a bottom case connected to the base body, wherein the base body and the housing constitute a box body, and the base body and the bottom case constitute a sealing groove;

a button through hole is formed in the shell, one end of the button is arranged in the box body, and the other end of the button extends out of the box body through the button through hole;

a movable contact arm, a normally open static contact pin, a normally closed static contact pin, a movable contact arm bracket and a tension spring are arranged below the button; the normally open static contact pin, the normally closed static contact pin and the movable contact arm support are all arranged on the base body, the movable contact arm is arranged on the movable contact arm support, one end of the tension spring is connected to the movable contact arm, and the other end of the tension spring is connected to the movable contact arm support;

the movable contact arm is provided with a movable contact, the normally open static contact pin is provided with a normally open static contact, and the normally closed static contact pin is provided with a normally closed static contact.

In one embodiment, the switch further comprises a sealing sleeve, and the sealing sleeve is arranged on the button and extends out of one end of the box body.

In one embodiment, the cross-sectional shape of the sealing sleeve is circular, the diameter of the cross-section of the end of the sealing sleeve close to the base body is larger than the diameter of the cross-section of the end of the sealing sleeve far away from the base body;

a button boss is arranged at the position of the shell, where the button through hole is formed, the top of the button boss is provided with a boss outer edge, and the bottom of the sealing sleeve is sleeved on the boss outer edge;

the top of the button is provided with a button outer edge, and the top of the sealing sleeve is sleeved on the button outer edge.

In one embodiment, the base body is provided with a base body first through hole, a base body second through hole and a base body third through hole;

the terminal of the movable contact arm support extends into the fixed sealing groove through the first through hole of the base body, the terminal of the normally open static contact pin extends into the fixed sealing groove through the second through hole of the base body, and the terminal of the normally closed static contact pin extends into the fixed sealing groove through the third through hole of the base body;

the joint of the terminal of the movable contact arm bracket and the lead end, the joint of the terminal of the normally open static contact pin and the lead end, and the joint of the terminal of the normally closed static contact pin and the lead end are all arranged in the fixed sealing groove

And after the terminal of the movable contact arm support, the terminal of the normally open static contact pin and the terminal of the normally closed static contact pin are connected with the wire end, sealant is filled in the fixed sealing groove.

In one embodiment, a plurality of first base body barbs and second base body barbs are arranged on the base body;

a plurality of bottom shell first through holes matched with the first barbs of the base body are formed in the bottom shell, and the number and the positions of the bottom shell first through holes correspond to those of the first barbs of the base body;

be provided with on the shell a plurality of with base body second overhead kick complex shell second through-hole, the quantity and the position of shell second through-hole with the quantity and the position of base body second overhead kick correspond.

In one embodiment, one end of the normally open static contact pin, on which the normally open static contact is arranged, is arranged below one end of the normally closed static contact pin, on which the normally closed static contact is arranged, and one end of the movable contact arm, on which the movable contact is arranged, is located between one end of the normally open static contact pin, on which the normally open static contact is arranged, and one end of the normally closed static contact pin, on which the normally closed static contact is arranged.

In one embodiment, the bottom of the button is provided with a semicircular groove, and the upper part of the tension spring is embedded in the semicircular groove;

the movable contact arm support is provided with a first connecting hole, the movable contact arm is provided with a second connecting hole, one end of the tension spring is connected to the movable contact arm support through the first connecting hole, and the other end of the tension spring is connected to the movable contact arm through the second connecting hole.

In one embodiment, clamping platforms are arranged on two sides of the bottom of the button, a clamping groove matched with the clamping platforms is formed in the shell, and the clamping platforms can slide up and down in the clamping groove.

In one embodiment, a connecting groove is arranged at a position on the movable contact arm bracket, which is connected with the movable contact arm, and trapezoidal clamping positions are arranged on two side walls of the connecting groove; the movable contact arm is provided with a connecting block matched with the connecting groove and an L-shaped clamping position matched with the trapezoidal clamping position;

the movable contact arm support and the one end both sides of base body joint are provided with the projection respectively, be provided with on the base body inner wall with projection complex base body draw-in groove.

In one embodiment, the switch further comprises a handle disposed above the button;

the shell is arranged on the mounting table, mounting columns are arranged on two sides of the mounting table, a mounting head is arranged at one end of the handle, a mounting hole is formed in the mounting head, the mounting head is sleeved on the mounting table, and the mounting hole in the mounting head is clamped on the mounting column on the mounting table so that one end of the handle is mounted on the shell.

The implementation of the present disclosure includes the following technical effects:

1. the utility model provides a waterproof dustproof micro-gap switch, through with the shell spiral-lock on the upper portion of base body, will earlier simultaneously on the shell rib position and base body contact all around, the reuse ultrasonic wave welds for rib position welding all around on the shell is on the base body, thereby has realized the dustproof and waterproof function between shell and the base body.

2. The utility model has the advantages of simple structure, use, maintenance and repair are simple and easy, can extensively be used for all kinds of utensils, electric tool and outdoor garden instrument that have dustproof waterproof requirement to the switch.

Drawings

Fig. 1 is a perspective view of the dust-proof and water-proof microswitch of the present disclosure, with a lead terminal.

Fig. 2 is a perspective view of the small microswitch with dustproof and waterproof functions according to the present disclosure, wherein the terminal is a plug-in terminal.

Fig. 3 is a cross-sectional view of the dust-proof and water-proof microswitch wired terminal shown in fig. 1, wherein the push button is in a released state.

Fig. 4 is a sectional view of the microswitch wired terminal shown in fig. 1, in which the push button is in a pressed state.

Fig. 5 is a cross-sectional view of the dust-proof and water-proof microswitch shown in fig. 2, wherein the push button is in a released state.

Fig. 6 is a sectional view of the dust-proof and water-proof microswitch shown in fig. 2, wherein the push button is in a pressed state. Fig. 7 is an exploded view of the dust and water resistant microswitch of fig. 1.

Fig. 8 is an assembly schematic view of the movable contact arm bracket assembly of the dustproof and waterproof microswitch shown in fig. 1.

Fig. 9 is an assembly view of the terminal assembly of the dust-proof and water-proof microswitch shown in fig. 1.

Fig. 10 is a schematic view of the assembly of the dust-proof and water-proof microswitch shown in fig. 1.

In the figure, 1-a base body, 2-a button, 3-a shell, 4-a bottom shell, 5-a movable contact arm, 6-a normally open fixed contact pin, 7-a normally closed fixed contact pin, 8-a movable contact arm bracket, 9-a tension spring, 10-a sealing sleeve, 11-a handle, 12-a first lead, 13-a second lead, 14-a third lead, 21-a button outer edge, 22-a semicircular groove, 23-a clamping platform, 31-a button through hole, 32-a button boss, 321-a boss outer edge, 33-a shell second through hole, 34-a clamping groove, 35-a mounting platform, 351-a mounting column, 41-a bottom shell first through hole, 51-a movable contact, 52-a second connecting hole, 53-a connecting block, 54-an L-type clamping position and 61-a normally open contact, 71-normally closed stationary contact, 81-first connecting hole, 82-connecting groove, 821-trapezoidal clamping position, 83-convex column, 101-base body first through hole, 102-base body second through hole, 103-base body third through hole, 104-base body first inverted hook, 105-base body second inverted hook, 106-base body clamping groove, 111-mounting head and 1111-mounting hole.

Detailed Description

The present disclosure will be described in detail below with reference to embodiments and drawings, it being noted that the described embodiments are only intended to facilitate understanding of the present disclosure, and do not impose any limitation thereon.

The orientations described in the present application, such as up, down, left, right, and left, are convenient to use and described with reference to the drawings, and do not limit the scope of protection.

As shown in fig. 1-10, the dustproof and waterproof microswitch provided by the present disclosure includes a base body 1, a button 2, and a housing 3 and a bottom case 4 connected to the base body 1, wherein the base body 1 and the housing 3 form a box body, and the base body 1 and the bottom case 4 form a sealing groove;

a button through hole 31 is formed in the shell 3, one end of the button 2 is arranged in the box body, and the other end of the button 2 extends out of the box body through the button through hole 31;

a moving contact arm 5, a normally open static contact pin 6, a normally closed static contact pin 7, a moving contact arm bracket 8 and a tension spring 9 are arranged below the button 2; the normally open static contact pin 6, the normally closed static contact pin 7 and the movable contact arm support 8 are all arranged on the base body 1, the movable contact arm 5 is arranged on the movable contact arm support 8, one end of the tension spring 9 is connected to the movable contact arm 5, and the other end of the tension spring 9 is connected to the movable contact arm support 8;

the movable contact arm 5 is provided with a movable contact 51, the normally open static contact pin 6 is provided with a normally open static contact 61, and the normally closed static contact pin 7 is provided with a normally closed static contact 71.

The utility model provides a waterproof dustproof micro-gap switch, through with the shell spiral-lock on the upper portion of base body, will earlier simultaneously on the shell rib position and base body contact all around, the reuse ultrasonic wave welds for rib position welding all around on the shell is on the base body, thereby has realized the dustproof and waterproof function between shell and the base body. Moreover, the dustproof and waterproof microswitch disclosed by the invention has the waterproof and dustproof functions, is simple and compact in structure and low in manufacturing cost, is suitable for various appliances, electric tools and outdoor garden tools which have dustproof and waterproof requirements on the switch, such as a high-pressure cleaning machine, an electric chain saw, a pruner, a grass trimmer, a steam mop, a riding mower, a golf cart and the like, and meets the national safety standard.

As shown in fig. 1-7, the switch further includes a sealing sleeve 10, and the sealing sleeve 10 is disposed on the button 2 and extends out of one end of the box body.

In this embodiment, through setting up the seal cover for can closely cooperate through the elasticity of seal cover between button and the shell, thereby improve the waterproof dustproof performance of switch.

Preferably, the cross-sectional shape of the sealing sleeve 10 is circular, and the diameter of the cross section of the end close to the base body 1 is larger than that of the end far away from the base body 1; that is, the seal cartridge in the present embodiment is provided in a truncated cone-like structure in which the end having the large area of the conical surface is provided close to the housing and the end having the small area of the conical surface is provided away from the housing.

As shown in fig. 7, a button boss 32 is disposed at a position on the housing 3 where the button through hole 31 is disposed, a boss outer edge 321 is disposed at a top of the button boss 32, and the bottom of the sealing sleeve 10 is sleeved on the boss outer edge 321;

the top of the button 2 is provided with a button outer edge 21, and the top of the sealing sleeve 10 is sleeved on the button outer edge 21.

In this embodiment, set up the button boss through setting up button through-hole position on the shell to be provided with the boss outer edge at button boss top, so that with the bottom suit of seal cover on the shell, can avoid liquid or dust to get into inside the switch and influence the switching performance from the contact department of shift knob and shell simultaneously completely. The top of the button is provided with the button outer edge, so that the top of the sealing sleeve is sleeved on the button, and meanwhile, liquid or dust can be completely prevented from entering the switch from the mounting position of the switch button and the sealing sleeve to affect the normal function of the switch.

As shown in fig. 7, the base body 1 is provided with a base body first through hole 101, a base body second through hole 102 and a base body third through hole 103;

the terminal of the movable contact arm support 8 extends into the fixed sealing groove through the first base body through hole 101, the terminal of the normally open static contact pin 6 extends into the fixed sealing groove through the second base body through hole 102, and the terminal of the normally closed static contact pin 7 extends into the fixed sealing groove through the third base body through hole 103;

the joint of the terminal of the movable contact arm bracket 8 and the lead end, the joint of the terminal of the normally open static contact pin 6 and the lead end, and the joint of the terminal of the normally closed static contact pin 7 and the lead end are all arranged in the fixed sealing groove;

and after the terminal of the movable contact arm support 8, the terminal of the normally open static contact pin 6 and the terminal of the normally closed static contact pin 7 are connected with the wire end, sealant is poured into the fixed sealing groove.

In the embodiment, the base body is provided with the first base body through hole, the second base body through hole and the third base body through hole, so that the normally open static contact pins and the normally closed static contact pins between the movable contact arms are respectively fixed on the base body; and the junction of the terminal and the wire end of the contact arm support, the junction of the terminal and the wire end of the normally open static contact pin and the junction of the terminal and the wire end of the normally closed static contact pin are all arranged in the fixed sealing groove, so that the dustproof and waterproof functions of the terminal and the bottom shell are realized.

It should be noted that the wire end in this embodiment may be an insert terminal or a wire terminal; in the case of wire terminals, the wire terminals include a first wire 12, a second wire 13, and a third wire 14.

Moreover, in order to further increase the waterproof and dustproof effects of the switch, the joint of the plug end and the lead end 1 is arranged in the box body of the bottom case (in the fixed sealing groove), and the joint of the plug end and the lead end is covered by sealant filled in the box body of the bottom case, so that the dustproof and waterproof functions of the terminal and the bottom case can be realized. If the wire terminal is not adopted, only the insert terminal is adopted, and the periphery of the terminal is coated with sealant to realize the dustproof function of the terminal part.

As shown in fig. 7, a plurality of base body first barbs 104 and base body second barbs 105 are arranged on the base body 1;

a plurality of bottom case first through holes 41 matched with the base body first barbs 104 are formed in the bottom case 4, and the number and the positions of the bottom case first through holes 41 correspond to the number and the positions of the base body first barbs 104;

be provided with on the shell 3 a plurality of with base body second overhead hook 105 complex shell second through-hole 33, the quantity and the position of shell second through-hole 33 with the quantity and the position of base body second overhead hook 105 correspond.

As shown in fig. 3-6 and 9-10, the end of the normally open stationary contact pin 6, on which the normally open stationary contact 61 is disposed, is located below the end of the normally closed stationary contact pin 7, on which the normally closed stationary contact 71 is disposed, and the end of the movable contact arm 5, on which the movable contact 51 is disposed, is located between the end of the normally open stationary contact pin 6, on which the normally open stationary contact 61 is disposed, and the end of the normally closed stationary contact pin 7, on which the normally closed stationary contact 71 is disposed.

In this embodiment, the base body 1 is provided with the plurality of base body first barbs 104, the bottom case 4 is provided with the plurality of bottom case first through holes 41 matched with the base body first barbs, and the bottom case 4 is accurately and quickly mounted on the base body 1 through the matching of the base body first barbs 104 and the bottom case first through holes 41; through set up a plurality of base body second overhead kick 105 on the base body 1, set up a plurality ofly on shell 3 simultaneously with base body second overhead kick complex shell second through-hole 33, through the cooperation of base body second overhead kick 105 with shell second through-hole 33 to install shell 3 on base body 1 accurately, fast.

As shown in fig. 7 and 10, a semicircular groove 22 is formed at the bottom of the button 2, and the upper part of the tension spring 9 is embedded in the semicircular groove 22;

be provided with first connecting hole 81 on the movable contact arm support 8, be provided with second connecting hole 52 on the movable contact arm 5, the one end of extension spring 9 passes through first connecting hole 81 connect in on the movable contact arm support 8, the other end passes through second connecting hole 52 connect in on the movable contact arm 5.

As shown in fig. 7, clamping platforms 23 are arranged on two sides of the bottom of the button 2, a clamping groove 34 matched with the clamping platform 23 is arranged on the housing 3, and the clamping platforms 23 can slide up and down in the clamping groove 34.

As shown in fig. 7-8, a connecting groove 82 is provided at a position on the movable contact arm support 8, which is connected to the movable contact arm 5, and trapezoidal clamping positions 821 are provided on two side walls of the connecting groove 82; the movable contact arm 5 is provided with a connecting block 53 matched with the connecting groove 82 and an L-shaped clamping position 54 matched with the trapezoidal clamping position 821;

the movable contact arm support 8 with the one end both sides of the joint of base body 1 are provided with projection 83 respectively, be provided with on the base body 1 inner wall with projection 83 complex base body draw-in groove 106.

In this embodiment, through on touching the arm support with the one end both sides of base body joint set up the projection respectively, set up simultaneously on the base body inner wall with this projection complex base body draw-in groove to cooperation through projection and base body draw-in groove realizes the preliminary fixed of movable contact arm support, thereby has simplified the fixed mode between the movable contact arm, has saved the cost of labor.

As shown in fig. 1-7, the switch further comprises a handle 11 disposed above the button 2;

set up in mount table 35 on the shell 3, the both sides of mount table 35 all set up erection column 351, the one end of handle 11 is provided with installation head 111, set up mounting hole 1111 on the installation head 111, installation head 111 suit in on the mount table 35, the mounting hole 1111 joint on the installation head 111 in on the erection column 351 on the mount table, with the one end of handle 11 is installed in on the shell 3.

In the embodiment, the handle is arranged on the shell and is arranged above the button, so that the button can be operated quickly and conveniently through the handle, and the time cost is saved.

It should be noted that the handle in the embodiment of the present disclosure may also have a structure shown in the handle 11A in fig. 5, and the embodiment of the present disclosure does not limit the specific structure of the handle.

It should be further noted that mounting platforms may be provided at both ends of the top portion of the housing in the disclosed embodiments, so that the handle may be movably attached to either end of the top portion of the housing as desired for use.

The utility model provides a dustproof and waterproof micro-gap switch, its working process as follows:

when pressing button 2, button 2 can drive the downward wrench movement of department in the middle of extension spring 9, extension spring 9 begins to warp, when extension spring 9 right side and movable contact arm 5's contained angle diminishes gradually and is close or be less than 0 when, movable contact arm 5 can use two trapezoidal joint position 851 of movable contact arm support 8 to do clockwise as the fulcrum and jump, normally closed stationary contact 71 on movable contact 51 and the normally closed stationary contact 7 breaks off, contact with normally open stationary contact 61 on the normally open stationary contact 6 again, the switch-on function of switch has been realized.

When the button 2 is released, the button 2 resets under the self reset acting force of the tension spring 9, the included angle between the right side of the tension spring 9 and the movable contact arm 5 gradually changes from negative to positive, when a critical point is reached, under the reset force of the tension spring 9, the movable contact arm 5 can make anticlockwise jump by using two trapezoidal clamping positions 851 of the movable contact arm support 8 as a fulcrum, the movable contact 51 is disconnected with the normally open stationary contact 61 on the normally open stationary contact pin 6 and then is contacted with the normally closed stationary contact 71 on the normally closed stationary contact pin 7, and the normally closed brake function of the switch is realized.

Finally, it should be noted that the above embodiments are only intended to illustrate the technical solutions of the present disclosure, and not to limit the scope of the present disclosure, and although the present disclosure has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present disclosure without departing from the spirit and scope of the technical solutions of the present disclosure.

Claims (10)

1. A dustproof and waterproof microswitch is characterized by comprising a base body, a button, a shell and a bottom shell, wherein the shell and the bottom shell are connected with the base body;

a button through hole is formed in the shell, one end of the button is arranged in the box body, and the other end of the button extends out of the box body through the button through hole;

a movable contact arm, a normally open static contact pin, a normally closed static contact pin, a movable contact arm bracket and a tension spring are arranged below the button; the normally open static contact pin, the normally closed static contact pin and the movable contact arm support are all connected to the base body, the movable contact arm is arranged on the movable contact arm support, one end of the tension spring is connected to the movable contact arm, and the other end of the tension spring is connected to the movable contact arm support;

the movable contact arm is provided with a movable contact, the normally open static contact pin is provided with a normally open static contact, and the normally closed static contact pin is provided with a normally closed static contact.

2. The dustproof and waterproof microswitch of claim 1, further comprising a sealing sleeve disposed on the button and extending out of one end of the box.

3. The micro switch of claim 2, wherein the cross-sectional shape of the sealing sleeve is circular, and the diameter of the cross-section of the end of the sealing sleeve close to the base body is larger than that of the end of the sealing sleeve far away from the base body;

a button boss is arranged at the position of the shell, where the button through hole is formed, the top of the button boss is provided with a boss outer edge, and the bottom of the sealing sleeve is sleeved on the boss outer edge;

the top of the button is provided with a button outer edge, and the top of the sealing sleeve is sleeved on the button outer edge.

4. The dustproof and waterproof microswitch of any one of claims 1 to 3, wherein the base body is provided with a base body first through hole, a base body second through hole and a base body third through hole;

the terminal of the movable contact arm support extends into the fixed sealing groove through the first through hole of the base body, the terminal of the normally open static contact pin extends into the fixed sealing groove through the second through hole of the base body, and the terminal of the normally closed static contact pin extends into the fixed sealing groove through the third through hole of the base body;

the joint of the terminal of the movable contact arm bracket and the lead end, the joint of the terminal of the normally open static contact pin and the lead end, and the joint of the terminal of the normally closed static contact pin and the lead end are all arranged in the fixed sealing groove;

and after the terminal of the movable contact arm support, the terminal of the normally open static contact pin and the terminal of the normally closed static contact pin are respectively connected with the wire end, sealing glue is poured into the fixed sealing groove.

5. The dustproof and waterproof microswitch of any one of claims 1 to 3, wherein a plurality of base body first barbs and base body second barbs are arranged on the base body;

a plurality of bottom shell first through holes matched with the first barbs of the base body are formed in the bottom shell, and the number and the positions of the bottom shell first through holes correspond to those of the first barbs of the base body;

be provided with on the shell a plurality of with base body second overhead kick complex shell second through-hole, the quantity and the position of shell second through-hole with the quantity and the position of base body second overhead kick correspond.

6. The dustproof and waterproof microswitch according to any one of claims 1 to 3, wherein one end of the normally open stationary contact pin on which the normally open stationary contact is provided is arranged opposite to one end of the normally closed stationary contact pin on which the normally closed stationary contact is provided, and the one end of the normally open stationary contact pin on which the normally open stationary contact is provided is arranged below one end of the normally closed stationary contact pin on which the normally closed stationary contact is provided;

one end of the movable contact arm, which is provided with the movable contact, is positioned between one end of the normally open static contact pin, which is provided with the normally open static contact, and one end of the normally closed static contact pin, which is provided with the normally closed static contact.

7. The dustproof and waterproof microswitch of any one of claims 1 to 3, wherein a semicircular groove is formed in the bottom of the button, and the upper part of the tension spring is embedded in the semicircular groove;

the movable contact arm support is provided with a first connecting hole, the movable contact arm is provided with a second connecting hole, one end of the tension spring is connected to the movable contact arm support through the first connecting hole, and the other end of the tension spring is connected to the movable contact arm through the second connecting hole.

8. The dustproof and waterproof microswitch of claim 7, wherein clamping platforms are arranged on two sides of the bottom of the button, a clamping groove matched with the clamping platforms is arranged on the shell, and the clamping platforms can slide up and down in the clamping groove.

9. The dustproof and waterproof microswitch according to any one of claims 1 to 3, wherein a connecting groove is arranged at a position on the movable contact arm bracket, which is connected with the movable contact arm, and trapezoidal clamping positions are arranged on two side walls of the connecting groove; the movable contact arm is provided with a connecting block matched with the connecting groove and an L-shaped clamping position matched with the trapezoidal clamping position;

the movable contact arm support and the one end both sides of base body joint are provided with the projection respectively, be provided with on the base body inner wall with projection complex base body draw-in groove.

10. The microswitch of any one of claims 1-3, wherein the switch further comprises a handle disposed above the button;

the shell is arranged on the mounting table, mounting columns are arranged on two sides of the mounting table, a mounting head is arranged at one end of the handle, a mounting hole is formed in the mounting head, the mounting head is sleeved on the mounting table, and the mounting hole in the mounting head is clamped on the mounting column on the mounting table so that one end of the handle is mounted on the shell.

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