CN212380359U - Assembly structure of bimetallic strip and movable contact spring in miniature thermal protector for battery - Google Patents
Assembly structure of bimetallic strip and movable contact spring in miniature thermal protector for battery Download PDFInfo
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- CN212380359U CN212380359U CN202021054566.XU CN202021054566U CN212380359U CN 212380359 U CN212380359 U CN 212380359U CN 202021054566 U CN202021054566 U CN 202021054566U CN 212380359 U CN212380359 U CN 212380359U
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- movable contact
- bimetallic strip
- contact
- thermal protector
- bimetal
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Abstract
The utility model relates to an assembly structure of bimetallic strip and movable contact spring in a minitype thermal protector for a battery, which is characterized by comprising a movable contact spring and a bimetallic strip, wherein one surface of the movable contact spring is provided with two contact convex parts, and a abdication gap is formed between the two contact convex parts; the bimetallic strip is arranged on the two contact convex parts in a spanning mode, is bent in an arc shape, and enables the middle of the bimetallic strip to be arranged in the abdicating gap. The utility model discloses in be formed with the clearance of stepping down between two contact convex parts on the movable contact spring, and the middle part of bimetallic strip is arranged in the clearance of stepping down on the movable contact spring, and this bending radian that can be convenient for make bimetallic strip is bigger to help improving the sensitivity of bimetallic strip action, this can play the purpose that reduces the potential safety hazard, and this package assembly's overall structure is very simple, and it is also very convenient that it makes.
Description
Technical Field
The utility model relates to a battery protection accessory field, especially an assembly structure of bimetallic strip and movable contact spring among miniature hot protector for battery.
Background
At present, a movable contact spring and a bimetallic strip are arranged on most micro thermal protectors. Most of the existing movable contact pieces are in a straight sheet structure, the bimetallic strip is in a bent structure, and the movable contact pieces and the bimetallic strip are arranged in a laminated relationship. In order to control the volume of the miniature thermal protector, the bending arc of the bimetallic strip is generally made as small as possible; the smaller the curvature of the bimetal, the weaker the sensitivity. Therefore, the micro thermal protector can not timely break the circuit and also can not timely protect the circuit, and certain potential safety hazards exist. Therefore, it is necessary to redesign the assembly structure of the bimetal and the movable contact.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the above-mentioned problem and not enough, the utility model provides an assembly structure of bimetallic strip and movable contact spring among the miniature thermal protector for battery, be formed with the clearance of stepping down between two contact convex parts on the movable contact spring among this assembly structure, and the middle part of bimetallic strip is arranged in on the movable contact spring in the clearance of stepping down, this can be convenient for make the crooked radian of bimetallic strip bigger, thereby help improving the sensitivity of bimetallic strip action, this can play the purpose that reduces the potential safety hazard, and this assembly structure's overall structure is very simple, it is also very convenient that it makes.
The technical scheme of the utility model is realized like this:
an assembly structure of a bimetallic strip and a movable contact strip in a miniature thermal protector for a battery is characterized by comprising the movable contact strip and the bimetallic strip, wherein one surface of the movable contact strip is provided with two contact convex parts, and a yielding gap is formed between the two contact convex parts; the bimetallic strip is arranged on the two contact convex parts in a spanning mode, is bent in an arc shape, and enables the middle of the bimetallic strip to be arranged in the abdicating gap.
Preferably, the movable contact piece includes a contacting portion, an elastic portion, a fixing portion, and an external portion, the contacting portion is connected to one end portion of the elastic portion, one end of the fixing portion is connected to the other end portion of the elastic portion, the external portion is connected to the other end portion of the fixing portion, and the two contact convex portions are disposed on a surface of the elastic portion.
Preferably, the contacting portion, the elastic portion, the fixing portion and the external connecting portion are of an integral structure.
Preferably, the fixing part is provided with a through sleeving hole.
Preferably, a silver plating layer is provided on the surface of the contact portion.
Preferably, at least one protrusion is disposed on a surface of the external connection portion.
Preferably, the width of the fixing portion is greater than the width of the elastic portion.
Preferably, one end of the elastic portion is bent in a direction of a surface where the contact protrusion is located.
The utility model has the advantages that: the utility model discloses an among the package assembly, through set up two contact convex parts on the movable contact spring, still make the bimetallic strip stride locate two contact convex parts on to and make the middle part of bimetallic strip arrange in the clearance of stepping down between two contact convex parts. The bending radian of the bimetallic strip can be conveniently increased, so that the action sensitivity of the bimetallic strip can be conveniently improved, the purpose of breaking a circuit can be timely achieved, the protection effect can be timely achieved, and the potential safety hazard can be greatly reduced. Moreover, the compact structure between the movable contact piece and the bimetallic strip can be conveniently realized, so that the aim of manufacturing the miniature thermal protector with small thickness can be still met. Meanwhile, the whole structure of the assembly structure is very simple, and the assembly structure is very convenient to manufacture.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 3 is a schematic structural view of the movable contact spring of the present invention.
Fig. 4 is a schematic structural diagram of the usage state of the present invention.
Detailed Description
As shown in fig. 1, the assembly structure of the bimetallic strip and the moving contact strip in the miniature thermal protector for the battery according to the present invention comprises a moving contact strip 3 and a bimetallic strip 4, wherein, as shown in fig. 1 to 3, two contact protrusions 36 are arranged on one surface of the moving contact strip 3, and a relief gap 32 is formed between the two contact protrusions 36; as shown in fig. 1 and 2, the bimetal 4 straddles the two contact protrusions 36, and the bimetal 4 is curved in an arc shape such that the middle portion of the bimetal 4 is disposed in the abdicating gap 32. In the assembly structure of the present invention, by providing two contact protrusions 36 on the movable contact piece 3, the bimetal piece 4 is also straddled on the two contact protrusions 36, and the middle portion of the bimetal piece 4 is placed in the abdicating gap 32 between the two contact protrusions 36. The bending radian of the bimetallic strip 4 can be conveniently increased, so that the action sensitivity of the bimetallic strip 4 can be conveniently improved, the purpose of breaking a circuit can be timely achieved, the protection effect can be timely achieved, and the potential safety hazard can be greatly reduced. Moreover, it is convenient to have a compact structure between the movable contact piece 3 and the bimetal piece 4, so that the purpose of manufacturing a miniature thermal protector with a small thickness can be still satisfied. Meanwhile, the whole structure of the assembly structure is very simple, and the assembly structure is very convenient to manufacture.
After the bimetal 4 is heated to a certain height, the bending direction thereof is changed. The action change at this time is as follows: the bending direction of the bimetallic strip 4 changes, the middle part of the bimetallic strip 4 withdraws from the abdicating gap 32, and the two ends of the bimetallic strip 4 are pressed against the two contact convex parts 36, so that the movable contact piece 3 can be pushed by the bimetallic strip 4. Because the bending radian of the bimetallic strip 4 can be larger, the action of the bimetallic strip can be more sensitive, and in addition, the two ends of the bimetallic strip 4 can be closer to the movable contact strip 3, the purpose of quickly pushing away the movable contact strip 3 can be achieved, and a good protection effect can be achieved.
As shown in fig. 4, during use, the bimetallic strip 4 and the movable contact piece 3 are both arranged on the insulating seat 5. A receiving groove 51 is formed on the top surface of the insulating holder 5, the bimetal 4 is received in the receiving groove 51, the movable contact piece 3 is arranged on the insulating holder 5, and the two contact protrusions 36 on the movable contact piece 3 are received in the receiving groove 51. Thus, the bimetallic strip 4 and the movable contact piece 3 can meet the use requirement.
The height of the contact protrusion 36 can control the stroke between the movable contact and the fixed contact. Thus, different heights of the contact convex part 36 can be adopted to control the reset stroke of the movable contact.
As shown in fig. 3, the movable contact piece 3 includes a contacting portion 33, an elastic portion 37, a fixing portion 34, and an external portion 35, the contacting portion 33 is connected to one end portion of the elastic portion 37, one end of the fixing portion 34 is connected to the other end portion of the elastic portion 37, the external portion 35 is connected to the other end portion of the fixing portion 34, and two contacting protrusions 36 are provided on a surface of the elastic portion 37. The structure of the movable contact piece 3 is very simple and reliable, which can meet the requirements of action contact, fixation and external connection, and is very practical.
The contact protrusion 36 may be obtained by punching the elastic portion 37, or may be integrally formed with the elastic portion 37.
As shown in fig. 1 to 3, the contacting portion 33, the elastic portion 37, the fixing portion 34, and the external connecting portion 35 are integrally formed. By adopting the integral structure, the reliability of the movable contact piece 3 and the convenience of manufacture are improved.
As shown in fig. 3, the fixing portion 34 is provided with a through-hole 341. As shown in fig. 4, the sleeving hole 341 is provided to position the movable contact piece 3 when the movable contact piece is mounted on the insulating base 5, which not only helps to improve the accuracy of mounting the movable contact piece 3, but also helps to improve the reliability of mounting the movable contact piece 3, and facilitates the mounting of the movable contact piece 3.
The nesting hole 341 is rectangular, circular, elliptical, triangular, hexagonal, or the like.
As shown in fig. 3, a silver plating layer 331 is provided on the surface of the contact portion 33. Because silver has good conductive performance, the stability of circuit communication can be ensured by the arrangement of the silver plating layer 331, thereby being beneficial to improving the reliability of the assembly structure.
As shown in fig. 1 to 3, at least one protrusion 351 is provided on a surface of the external connection portion 35. Through the setting of bellying 351, can increase the welding area of wire welding on external portion 35 and the structural strength of reinforcing welding department, help improving the reliability that external portion 35 and wire are connected like this.
When welding, the lead is contacted with the surface of the external connection part 35, the side edge of the lead is leaned against the convex part 351, and then the lead is welded on the external connection part 35 and the convex part 351, so that the welding area is increased, and the reliability of the connection between the external connection part 35 and the lead can be improved.
As shown in fig. 3, the width of the fixing portion 34 is greater than that of the elastic portion 37. This ensures that the fixing portion 34 has high structural strength, which contributes to improvement in reliability of mounting and fixing of the movable contact piece 3.
As shown in fig. 2 and 3, one end of the elastic portion 37 is bent in a direction of a surface where the contact convex portion 36 is located. This enables one of the contact protrusions 36 to be brought closer to the bimetal 4, which further improves the sensitivity of the action, thereby contributing to further improvement in the reliability of the assembled structure.
Claims (8)
1. The utility model provides an assembly structure of bimetallic strip and movable contact spring among miniature hot protector for battery which characterized in that: the moving contact piece comprises a moving contact piece (3) and a bimetallic strip (4), wherein one surface of the moving contact piece (3) is provided with two contact convex parts (36), and a yielding gap (32) is formed between the two contact convex parts (36); the bimetallic strip (4) is arranged on the two contact convex parts (36) in a spanning mode, the bimetallic strip (4) is bent in an arc shape, and the middle of the bimetallic strip (4) is arranged in the yielding gap (32).
2. The structure of claim 1 for assembling a bimetal and a movable contact in a micro thermal protector for a battery, wherein: the movable contact piece (3) comprises a contact portion (33), an elastic portion (37), a fixing portion (34) and an external portion (35), the contact portion (33) is connected to one end portion of the elastic portion (37), one end of the fixing portion (34) is connected to the other end portion of the elastic portion (37), the external portion (35) is connected to the other end portion of the fixing portion (34), and two contact convex portions (36) are arranged on the surface of the elastic portion (37).
3. The structure of assembling a bimetal and a movable contact in a micro thermal protector for a battery according to claim 2, wherein: the contact part (33), the elastic part (37), the fixing part (34) and the external connecting part (35) are of an integrated structure.
4. The structure of assembling a bimetal and a movable contact in a micro thermal protector for a battery according to claim 2, wherein: the fixing part (34) is provided with a through sleeving hole (341).
5. The structure of assembling a bimetal and a movable contact in a micro thermal protector for a battery according to claim 2, wherein: and a silver plating layer (331) is arranged on the surface of the contact part (33).
6. The structure of assembling a bimetal and a movable contact in a micro thermal protector for a battery according to claim 2, wherein: at least one convex part (351) is arranged on the surface of the external connection part (35).
7. The structure of assembling a bimetal and a movable contact in a micro thermal protector for a battery according to claim 2, wherein: the width of the fixed part (34) is larger than that of the elastic part (37).
8. The structure of assembling a bimetal and a movable contact in a micro thermal protector for a battery according to claim 2, wherein: one end of the elastic part (37) is bent in the direction of the surface where the contact convex part (36) is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021054566.XU CN212380359U (en) | 2020-06-09 | 2020-06-09 | Assembly structure of bimetallic strip and movable contact spring in miniature thermal protector for battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021054566.XU CN212380359U (en) | 2020-06-09 | 2020-06-09 | Assembly structure of bimetallic strip and movable contact spring in miniature thermal protector for battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212380359U true CN212380359U (en) | 2021-01-19 |
Family
ID=74180046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021054566.XU Active CN212380359U (en) | 2020-06-09 | 2020-06-09 | Assembly structure of bimetallic strip and movable contact spring in miniature thermal protector for battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212380359U (en) |
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2020
- 2020-06-09 CN CN202021054566.XU patent/CN212380359U/en active Active
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