CN215933449U

CN215933449U - Normally closed automatic reset microswitch

Info

Publication number: CN215933449U
Application number: CN202122670222.2U
Authority: CN
Inventors: 陈远锋; 曾飞雄
Original assignee: Huizhou Tongfabao Micro Control Technology Co ltd
Current assignee: Huizhou Tongfabao Micro Control Technology Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-03-01
Anticipated expiration: 2031-11-03

Abstract

The utility model discloses a normally closed automatic reset microswitch, which relates to the field of microswitches and aims at solving the problems of high assembly difficulty and low production efficiency of the existing microswitch due to complex structure. The microswitch provided by the utility model is novel in structure, and the device effectively solves the problems of high assembly difficulty and low production efficiency caused by complex structure of the existing microswitch.

Description

Normally closed automatic reset microswitch

Technical Field

The utility model relates to the field of microswitches, in particular to a normally-closed automatic reset microswitch.

Background

The volume of the microswitch is small, the microswitch is very suitable for being used by micro-miniature electrical equipment, the structures of most microswitches are very exquisite, the production process steps of parts are more and more complex, semi-automatic production can be usually carried out, many parts with complex shapes have to be assembled manually, and the production efficiency and the yield are difficult to improve.

SUMMERY OF THE UTILITY MODEL

The normally-closed automatic reset microswitch provided by the utility model solves the problems of high assembly difficulty and low production efficiency caused by complex structure of the existing microswitch.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a normally closed automatic reset microswitch comprises a rubber shell and a base, wherein the rubber shell is sleeved at the top end of the base, a control mechanism is arranged between the rubber shell and the base, and the control mechanism is a spring-controlled single-bridge normally closed structure;

the control mechanism comprises a first terminal, a second terminal and a contact piece, wherein the top end of the first terminal is in a semi-ring shape and is provided with a first bend, the top end of the second terminal is in a right-angle bend and is provided with a second bend, one end of the contact piece is in a semi-ring shape and is provided with a third bend, the third bend is sleeved with the first bend, and one end of the contact piece, far away from the first terminal, is overlapped with the bottom of the second bend;

and a third spring is arranged at one end of the contact piece, which is positioned at the third bend, downwards, a round hole is formed in the middle of the contact piece, and a second spring is arranged at the position, which is positioned at the round hole, of the bottom end of the contact piece.

Preferably, the top of gluing the shell is seted up flutedly, just the recess has cup jointed the button, the draw-in groove has all been seted up to the both sides of gluing the shell, the both sides of base all are provided with outer card, just outer card matches the joint with the draw-in groove, first circular slot, second circular slot, first slot and second slot have been seted up on the top of base, first slot and second slot distribute in the both ends of base.

Preferably, the first terminal is connected with the first slot in an inserting mode, the second terminal is connected with the second slot in an inserting mode, the bottom end of the second spring is connected with the first circular groove in a sleeved mode, the bottom end of the third spring is connected with the second circular groove in a sleeved mode, a cylinder is arranged in the second circular groove, and the cylinder is connected with the bottom end of the third spring in an inserting mode.

Preferably, the bottom of button is provided with first spring, first spring runs through the round hole, just first spring cup joints with the second spring.

Preferably, one end of the contact piece close to the second terminal is provided with a first contact, and the second bend is provided with a second contact at the first contact.

Preferably, the first terminal and the second terminal are both vertically arranged downwards.

The utility model has the beneficial effects that:

1. the contact piece and the first terminal of the device are sleeved by the semi-ring and are pressed tightly by the third spring, so that the requirement of small-amplitude deflection of the contact piece and the contact reliability are met, and the assembly difficulty is reduced compared with a common hinged structure with a shaft.

2. The device makes the contact piece deflect while disconnect through pushing down the button, also can compress first spring and second spring, make to loosen and make the button restore to the throne through first spring behind the button, make the contact piece restore to the throne through the second spring, and cup joint between the device's first spring and the second spring, the button also is in an axis with first spring and second spring, make the device keep simple structure compact when realizing normally closed automatic re-setting function, simple reset structure is favorable to reducing the assembly degree of difficulty.

In conclusion, the device effectively solves the problems that the existing microswitch is large in assembly difficulty and low in production efficiency due to complex structure.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the rubber case of the present invention after being opened.

Fig. 3 is an exploded view of the assembled structure of the present invention.

Fig. 4 is a schematic view of the internal structure of the closed state of the present invention.

Fig. 5 is a schematic diagram of the internal structure of the off state of the present invention.

Reference numbers in the figures: 1. a rubber shell; 101. a groove; 102. a button; 103. a card slot; 2. a base; 201. an outer card; 202. a first circular groove; 203. a second circular groove; 204. a cylinder; 205. a first slot; 206. a second slot; 3. a control mechanism; 301. a first terminal; 302. first bending; 303. a second terminal; 304. second bending; 305. a second contact; 306. a contact piece; 307. a circular hole; 308. a first contact; 309. thirdly, bending; 310. a first spring; 311. a second spring; 312. and a third spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, a normally closed automatic reset microswitch comprises a rubber casing 1 and a base 2, wherein the rubber casing 1 is sleeved on the top end of the base 2, a control mechanism 3 is arranged between the rubber casing 1 and the base 2, the control mechanism 3 is a spring-controlled single-bridge normally closed structure, the control mechanism 3 comprises a first terminal 301, a second terminal 303 and a contact piece 306, the top end of the first terminal 301 is in a semi-ring shape and is provided with a first bend 302, the top end of the second terminal 303 is in a right-angle bend and is provided with a second bend 304, one end of the contact piece 306 is in a semi-ring shape and is provided with a third bend 309, the third bend 309 is sleeved with the first bend 302, one end of the contact piece 306 far away from the first terminal 301 is lapped with the bottom of the second bend 304, one end of the contact piece 306 near the second terminal 303 is provided with a first contact 308, a second contact 305 is arranged at the position, located at the first contact 308, of the second bend 304, the first terminal 301 and the second terminal 303 are both vertically arranged downwards, a third spring 312 is arranged downwards at one end, located at the third bend 309, of the contact piece 306, a circular hole 307 is formed in the middle of the contact piece 306, and a second spring 311 is arranged at the position, located at the circular hole 307, of the bottom end of the contact piece 306;

the contact piece 306 and the first terminal 301 of the device are sleeved (overlapped) through the first bend 302 and the third bend 309, and the first bend 302 and the third bend 309 are of semi-annular structures, so that after the third bend 309 and the first bend 302 are pressed from bottom to top through the third spring 312, the whole contact piece 306 can deflect in a small range by taking the arc-shaped contact part of the first bend 302 and the third bend 309 as an axis.

The top end of the rubber casing 1 is provided with a groove 101, the groove 101 is sleeved with a button 102, the two sides of the rubber casing 1 are respectively provided with a clamping groove 103, the two sides of the base 2 are respectively provided with an outer clamp 201, the outer clamps 201 are matched and clamped with the clamping grooves 103, the top end of the base 2 is provided with a first circular groove 202, a second circular groove 203, a first slot 205 and a second slot 206, the first slot 205 and the second slot 206 are distributed at the two ends of the base 2, the first terminal 301 is inserted with the first slot 205, the second terminal 303 is inserted with the second slot 206, the bottom end of the second spring 311 is sleeved with the first circular groove 202, the bottom end of the third spring 312 is sleeved with the second circular groove 203, the second circular groove 203 is internally provided with a cylinder 204, the cylinder 204 is inserted with the bottom end of the third spring 312, the bottom end of the button 102 is provided with a first spring 310, and the first spring 310 penetrates through the circular hole 307, the first spring 310 is sleeved with the second spring 311;

at this time, as shown in fig. 5, the device presses the button 102 to make the button 102 compress the first spring 310 downwards, continues to press the button 102 to make the button 102 contact and press the contact piece 306 downwards, and simultaneously makes the second spring 311 compress, at this time, the contact piece 306 and the second terminal 303 are separated (if the short circuit is connected, the circuit is opened), after the button 102 is released, the first spring 310 resets the button 102, and the second spring 311 resets the contact piece 306, so that the contact piece 306 and the second terminal 303 are closed again, as shown in fig. 4.

The working principle is as follows: the contact piece 306 and the first terminal 301 of the device are sleeved (overlapped) through the first bend 302 and the third bend 309, because the first bend 302 and the third bend 309 both have semi-annular structures, after the third bend 309 and the first bend 302 are pressed from bottom to top through the third spring 312, the whole contact piece 306 can deflect in a small range by taking the arc-shaped contact part of the first bend 302 and the third bend 309 as an axis, and then the second spring 311 pushes upwards from the middle part of the contact piece 306, so that the other end of the contact piece 306 presses upwards the second bend 304 at the top end of the second terminal 303, the structure between the first terminal 301 and the second terminal 303 is normally closed, the device presses the button 102 downwards to compress the first spring 310 through pressing the button 102, continues to press the button 102, so that the button 102 contacts and presses the contact piece 306, and simultaneously, the second spring 311 compresses, when the contact piece 306 is separated from the second terminal 303, the first spring 310 resets the button 102 and the second spring 311 resets the contact piece 306 after the button 102 is released, so that the contact piece 306 and the second terminal 303 are closed again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A normally closed automatic reset microswitch comprises a rubber shell (1) and a base (2), and is characterized in that the rubber shell (1) is sleeved on the top end of the base (2), a control mechanism (3) is arranged between the rubber shell (1) and the base (2), and the control mechanism (3) is a spring-controlled single-bridge normally closed structure;

the control mechanism (3) comprises a first terminal (301), a second terminal (303) and a contact piece (306), the top end of the first terminal (301) is bent in a semi-ring shape and provided with a first bend (302), the top end of the second terminal (303) is bent in a right angle and provided with a second bend (304), one end of the contact piece (306) is bent in a semi-ring shape and provided with a third bend (309), the third bend (309) is sleeved with the first bend (302), and one end, far away from the first terminal (301), of the contact piece (306) is overlapped with the bottom of the second bend (304);

one end, located at the third bend (309), of the contact piece (306) is provided with a third spring (312) downwards, the middle of the contact piece (306) is provided with a round hole (307), and the bottom end of the contact piece (306) is provided with a second spring (311) located at the round hole (307).

2. The normally closed automatic reset microswitch according to claim 1, wherein a groove (101) is formed in the top end of the rubber casing (1), the button (102) is sleeved on the groove (101), the clamping grooves (103) are formed in both sides of the rubber casing (1), the outer clips (201) are arranged on both sides of the base (2), the outer clips (201) are in matched clamping connection with the clamping grooves (103), the top end of the base (2) is provided with a first circular groove (202), a second circular groove (203), a first slot (205) and a second slot (206), and the first slot (205) and the second slot (206) are distributed at both ends of the base (2).

3. The normally closed automatic reset microswitch of claim 2, wherein the first terminal (301) is inserted into the first slot (205), the second terminal (303) is inserted into the second slot (206), the bottom end of the second spring (311) is sleeved with the first circular groove (202), the bottom end of the third spring (312) is sleeved with the second circular groove (203), the second circular groove (203) is internally provided with the cylinder (204), and the cylinder (204) is inserted into the bottom end of the third spring (312).

4. The normally closed automatic reset microswitch of claim 2, wherein the bottom end of the button (102) is provided with a first spring (310), the first spring (310) penetrates through a round hole (307), and the first spring (310) is sleeved with a second spring (311).

5. A normally closed automatic reset microswitch according to claim 1, wherein the end of the contact piece (306) near the second terminal (303) is provided with a first contact (308) and the second bend (304) is provided with a second contact (305) at the first contact (308).

6. The normally closed automatic reset microswitch of claim 1 wherein the first terminal (301) and the second terminal (303) are both vertically downward disposed.