CN220796624U - Bimetallic strip for miniature circuit breaker with small current specification - Google Patents
Bimetallic strip for miniature circuit breaker with small current specification Download PDFInfo
- Publication number
- CN220796624U CN220796624U CN202322571970.4U CN202322571970U CN220796624U CN 220796624 U CN220796624 U CN 220796624U CN 202322571970 U CN202322571970 U CN 202322571970U CN 220796624 U CN220796624 U CN 220796624U
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- Prior art keywords
- metal sheet
- circuit breaker
- fold
- miniature circuit
- arc
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- 239000002184 metal Substances 0.000 claims abstract description 71
- 229910052751 metal Inorganic materials 0.000 claims abstract description 71
- 239000002131 composite material Substances 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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Abstract
The utility model discloses a bimetallic strip for a miniature circuit breaker with small current specification, which comprises a first metal strip and a second metal strip which are mutually combined and fixed, wherein the first metal strip is provided with a horizontal section corresponding to a fixed end, corrugated fold sections are arranged at corresponding contact ends, the side of each fold section is projected to be S-shaped corrugated, the second metal strip is overlapped with the first metal strip and is abutted and fixed, and filling layers are arranged in arc grooves of the corresponding fold sections of the second metal strip. Because the size is little, in order to improve sensitivity, first sheetmetal is provided with fold section, improves the length after the horizontal tensile, has the filling layer in the arc wall of fold section corresponding second sheetmetal one side, and the filling layer is as the metal level, extrudees fold section after the thermal expansion, forces fold section compression opposite side arc wall to take place bigger deformation, has bigger deformation space, avoids the electric arc problem that the deformation of small scale leads to.
Description
Technical Field
The utility model belongs to the technical field of bimetallic strips, and particularly relates to a bimetallic strip for a miniature circuit breaker with small current specification.
Background
A bi-metallic strip is a composite material composed of two or more metals or other materials having suitable properties. The bimetal is also called a thermal bimetal, and because of the different thermal expansion coefficients of the component layers, when the temperature changes, the deformation of the active layer is larger than that of the passive layer, so that the whole bimetal is bent towards one side of the passive layer, and the curvature of the composite material changes to generate deformation.
The two metals adopted are iron and copper, which are in strip shape, and are compounded together through the process, so that the copper strip has larger thermal expansion coefficient, so that the copper strip can be expanded and stretched when heated, and meanwhile, the iron sheet is acted to force the iron sheet to bend to one side, so that the whole arc bending is completed, and the copper strip is used for a control circuit under the current load state of an electric kettle, a circuit breaker and the like. The miniature circuit breaker with small current specification is severely compressed due to size limitation, the sensitivity of the induction current needs to be improved in a large range for adapting to the requirement, and the accurate control of the circuit is realized under the state of small current load.
Therefore, the bimetal strip mainly used in the miniature circuit breaker with small current is provided with two sections of deformation areas, the tail section deforms in a small range, the front section deforms in a large range, and the overall control accuracy is higher and more sensitive.
Disclosure of utility model
The utility model aims to provide a bimetallic strip for a small-current miniature circuit breaker, which is mainly used in the small-current miniature circuit breaker, and is provided with two deformation areas, namely a tail section deforms in a small range, a front section deforms in a large range, and the overall control accuracy is higher and more sensitive.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
The bimetallic strip for the miniature circuit breaker with the small current specification comprises a first metal sheet and a second metal sheet which are mutually combined and fixed, wherein one end of the first metal sheet is a fixed end, the other end of the first metal sheet is provided with a contact sheet, the first metal sheet is provided with a horizontal section corresponding to the fixed end, and corrugated fold sections are arranged at the corresponding contact sheet ends;
The side projection of the fold section is in an S-shaped corrugated shape, the horizontal section regularly extends to the contact piece, the second metal sheet is overlapped with the first metal sheet, is attached to and fixed to the first metal sheet, and the second metal sheet is provided with a filling layer in the arc-shaped groove corresponding to the fold section.
Further, the filling layer is formed by folding a second metal sheet towards the arc-shaped groove in a doubling mode, and the positions, corresponding to the arc-shaped groove, of the second metal sheet are folded to form the filling layer extending towards the arc-shaped groove.
Further, the second metal sheet is provided with a riveting rod corresponding to the horizontal section and the contact end, and the first metal sheet is provided with a riveting hole for fixing the riveting rod.
Further, the second metal sheet is further provided with a composite layer, and the composite layer is provided with sawtooth-shaped protrusions corresponding to the folded notches.
Further, the contact pieces and the connection parts of the horizontal sections and the fold sections are provided with reinforcing plates.
The utility model has the following beneficial effects: the utility model has small size, is suitable for miniature circuit breakers, and is used for power failure after current overload, and the main action principle is that the metal sheet heats due to different thermal expansion coefficients of metals, and the second metal sheet has large thermal expansion coefficient and drives the first metal sheet to deform.
Because the size is little, in order to improve sensitivity, first sheetmetal is provided with fold section, improves the length after the horizontal tensile, has the filling layer in the arc wall of fold section corresponding second sheetmetal one side, and the filling layer is as the metal level, extrudees fold section after the thermal expansion, forces fold section compression opposite side arc wall to take place bigger deformation, has bigger deformation space, avoids the electric arc problem that the deformation of small scale leads to.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings used for describing the embodiments will be briefly described below.
Fig. 1: the utility model is a schematic diagram of a disassembly and assembly structure.
Fig. 2: the utility model is a schematic diagram of an assembling structure.
In the drawings, the list of components represented by the various numbers is as follows: the metal sheet comprises a first metal sheet 1, a second metal sheet 2, a contact sheet 12, a horizontal section 11, a fold section 13, an arc-shaped groove 14, a filling layer 21, a riveting rod 22, a riveting hole 15, a composite layer 3 and a reinforcing plate 16.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
As shown in fig. 1-2: the bimetallic strip for the miniature circuit breaker with small current specification comprises a first metal sheet 1 and a second metal sheet 2 which are mutually compounded and fixed, wherein the first metal sheet has a small expansion coefficient, is generally an iron sheet, is used as a passive layer, the second metal sheet is metal with a large expansion coefficient, is generally a copper sheet, is used as an active layer, one end of the first metal sheet 1 is a fixed end and is used for being fixed at a circuit endpoint, the other end of the first metal sheet is provided with a contact 12 and is used for being connected with a next section of circuit, the first metal sheet 1 is provided with a horizontal section 11 corresponding to the fixed end, and corrugated sections 13 corresponding to the contact ends; similar to the extension of transverse waves, there are distinct peaks and valleys, but the amplitude is large and the period is short.
The side projection of the fold section 13 is in an S-shaped corrugated shape, the horizontal section 11 regularly extends towards the contact piece 12, arc grooves are correspondingly formed between adjacent wave peaks, the second metal sheet 2 is overlapped with the first metal sheet 1, the second metal sheet 2 is abutted against and fixed, and the filling layers 21 are respectively arranged in the arc grooves 14 of the corresponding fold section 13. The filling layer and the second metal sheet are integrally arranged.
The utility model has small size, is suitable for miniature circuit breakers, and is used for power failure after current overload, and the main action principle is that the metal sheet heats due to different thermal expansion coefficients of metals, and the second metal sheet has large thermal expansion coefficient and drives the first metal sheet to deform.
Because the size is little, in order to improve sensitivity, first sheetmetal is provided with fold section, improves the length after the horizontal tensile, has the filling layer in the arc wall of fold section corresponding second sheetmetal one side, and the filling layer is as the metal level, extrudees fold section after the thermal expansion, forces fold section compression opposite side arc wall to take place bigger deformation, has bigger deformation space, avoids the electric arc problem that the deformation of small scale leads to.
As shown in fig. 1: the filling layer 21 is formed by folding the second metal sheet 2 in half towards the arc-shaped groove 14, and the positions of the second metal sheet 2 corresponding to the arc-shaped groove 14 are folded to form the filling layer 21 extending towards the arc-shaped groove 14. The filling layer is a second metal sheet at two sides.
The second metal sheet 2 is provided with a riveting rod 22 corresponding to the horizontal section 11 and the end of the contact piece 12, and the first metal sheet 1 is provided with a riveting hole 15 for fixing the riveting rod. For improving the composite stability of the first metal sheet and the second metal sheet. The second metal sheet 2 is also provided with a composite layer 3, and the composite layer 3 is provided with zigzag bulges corresponding to the folded notches. The composite layer is used for improving the stability of the second metal sheet and improving the heat preservation effect.
As shown in fig. 1-2: the contact 12 and the connection of the horizontal section 11 and the corrugation section 13 are provided with stiffening plates 16. For facilitating the bending of the deformation towards a defined square.
The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model.
Claims (5)
1. A bimetallic strip for a miniature circuit breaker with small current specification is characterized in that:
The novel metal sheet comprises a first metal sheet (1) and a second metal sheet (2) which are mutually fixed in a compounding way, wherein one end of the first metal sheet (1) is a fixed end, the other end of the first metal sheet is provided with a contact sheet (12), the fixed end of the first metal sheet (1) is provided with a horizontal section (11) and the corresponding contact sheet ends are provided with corrugated fold sections (13);
the side projection of the fold section (13) is in an S-shaped corrugated shape, the corrugated shape regularly extends from the horizontal section (11) to the contact piece (12), the second metal piece (2) is overlapped and attached to and fixed with the first metal piece (1), and the second metal piece (2) is provided with a filling layer (21) in the arc-shaped groove (14) corresponding to the fold section (13).
2. The bimetal for a miniature circuit breaker of small current specification of claim 1, wherein: the filling layer (21) is formed by folding the second metal sheet (2) towards the arc-shaped groove (14), and the positions of the second metal sheet (2) corresponding to the arc-shaped groove (14) are folded to form the filling layer (21) extending towards the arc-shaped groove (14).
3. The bimetal for a miniature circuit breaker of small current specification according to claim 2, wherein: the second metal sheet (2) is provided with a riveting rod (22) corresponding to the horizontal section (11) and the contact sheet (12), and the first metal sheet (1) is provided with a riveting hole (15) for fixing the riveting rod.
4. The bimetal for a miniature circuit breaker of small current specification according to claim 2, wherein: the second metal sheet (2) is also provided with a composite layer (3), and the composite layer (3) is provided with zigzag bulges corresponding to the folded notch.
5. The bimetal for a miniature circuit breaker of small current specification of claim 1, wherein: the contact piece (12) and the connection part of the horizontal section (11) and the fold section (13) are respectively provided with a reinforcing plate (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322571970.4U CN220796624U (en) | 2023-09-20 | 2023-09-20 | Bimetallic strip for miniature circuit breaker with small current specification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322571970.4U CN220796624U (en) | 2023-09-20 | 2023-09-20 | Bimetallic strip for miniature circuit breaker with small current specification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220796624U true CN220796624U (en) | 2024-04-16 |
Family
ID=90633272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322571970.4U Active CN220796624U (en) | 2023-09-20 | 2023-09-20 | Bimetallic strip for miniature circuit breaker with small current specification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220796624U (en) |
-
2023
- 2023-09-20 CN CN202322571970.4U patent/CN220796624U/en active Active
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