CN215008118U - Small-sized circuit breaker - Google Patents
Small-sized circuit breaker Download PDFInfo
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- CN215008118U CN215008118U CN202121477475.1U CN202121477475U CN215008118U CN 215008118 U CN215008118 U CN 215008118U CN 202121477475 U CN202121477475 U CN 202121477475U CN 215008118 U CN215008118 U CN 215008118U
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- striking
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- plate
- circuit breaker
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Abstract
The utility model relates to a miniature circuit breaker, which comprises a shell, an operating mechanism, an arc extinguishing system, a moving contact which is in linkage fit with the operating mechanism, a static contact which is matched with the moving contact, and an electromagnetic trip, wherein the arc extinguishing system comprises an arc extinguishing chamber, a magnetic conductive plate and an arc striking plate which are arranged in the shell, one end of the magnetic conduction plate is connected with the static contact, the other end of the magnetic conduction plate extends to one end of the arc extinguish chamber, one end of the arc striking plate bends and extends towards the direction of the movable contact, and the other end of the arc striking plate extends to the other end of the arc extinguishing chamber, an arc striking channel is formed between the magnetic conduction plate and the arc striking plate, a plurality of arc striking convex strips are arranged in the shell corresponding to the arc striking channel, a driven contact of the plurality of arc striking convex strips bends and extends towards the arc extinguishing chamber, and a plurality of arc striking grooves are formed among the arc striking convex strips, and the width of each arc striking groove is gradually increased from the driven contact to the arc extinguishing chamber. The utility model has the advantages of simple structure, stable performance and reliability, convenient assembly and high breaking capacity.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to electric operating mechanism.
Background
The miniature circuit breaker is also called a miniature circuit breaker, is suitable for the overload and short-circuit protection of a line with the rated voltage of 50/60Hz and the rated current of 230/400V and the rated current of no more than 125A, and can also be used for the infrequent operation and the conversion of the line under the normal condition. The miniature circuit breaker is mainly used in various places such as industrial, commercial, high-rise and civil houses. The structural design of the arc extinguishing system of the existing miniature circuit breaker is unreasonable, so that the miniature circuit breaker has the defects of poor arc extinguishing effect and weak breaking capacity, and the miniature circuit breaker also has the defects of complex structure, unreliable performance and inconvenient assembly.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a simple structure, stable performance are reliable, the assembly is convenient, the high disconnected miniature circuit breaker who divides.
In order to achieve the purpose, the utility model adopts a miniature circuit breaker, which comprises a shell, an operating mechanism, an arc extinguishing system, a moving contact in linkage fit with the operating mechanism, a static contact in fit with the moving contact, and an electromagnetic release, the arc extinguishing system comprises an arc extinguishing chamber, a magnetic conduction plate and an arc striking plate which are arranged in a shell, one end of the magnetic conduction plate is connected to the static contact, the other end of the magnetic conduction plate extends to one end of the arc extinguishing chamber, one end of the arc striking plate bends and extends towards the direction of the movable contact, and the other end of the arc striking plate extends to the other end of the arc extinguishing chamber, an arc striking channel is formed between the magnetic conduction plate and the arc striking plate, a plurality of arc striking convex strips are arranged in the shell corresponding to the arc striking channel, a driven contact of the plurality of arc striking convex strips bends and extends towards the arc extinguishing chamber, and a plurality of arc striking grooves are formed among the arc striking convex strips, and the width of each arc striking groove is gradually increased from the driven contact to the arc extinguishing chamber.
The beneficial effect of above-mentioned structure is: be formed with the striking passageway of a closed loop between magnetic conduction board and the striking board, the striking passageway can introduce electric arc in the explosion chamber fast, thereby can realize the quick extinguishing of electric arc, and be provided with a plurality of striking grooves in the striking passageway, and the width driven contact in striking groove is crescent to the explosion chamber direction, thereby electric arc on the moving contact can be introduced fast in the explosion chamber, be favorable to strengthening this miniature circuit breaker's arc extinguishing effect, thereby this miniature circuit breaker has simple structure, the stable performance is reliable, the assembly is convenient, high disconnected advantage.
Particularly, one end of the static contact is provided with an arc striking angle which is bent and extended towards the arc extinguishing chamber, one end of the magnetic conduction plate is provided with an arc contact part which is matched with the arc striking angle, and the arc contact part is clamped in the arc striking angle and forms clamping matching of the magnetic conduction plate and the static contact. The magnetic conduction plate and the static contact are connected in a clamping fit mode, so that the magnetic conduction plate and the static contact can be assembled conveniently, and the magnetic conduction plate can quickly introduce electric arcs on the static contact into the arc extinguishing chamber, so that the arc extinguishing effect of the miniature circuit breaker can be improved.
Particularly, the shell is internally provided with an isolation convex strip corresponding to the position between the arc extinguish chamber and the connecting terminal, an arc discharge channel is formed between the isolation convex strip and the arc extinguish chamber, and the shell is provided with an arc discharge hole communicated with the arc discharge channel. The arc discharge channel can discharge residual electric arc outside the shell, thereby being beneficial to enhancing the arc extinguishing effect of the miniature circuit breaker.
Particularly, the other end of the static contact is provided with a clamping portion which is clamped in a clamping groove in the shell and forms clamping matching of the static contact and the shell, one end of a coil of the electromagnetic release is connected to the clamping portion of the static contact, and the other end of the coil is connected to the wiring terminal. Two ends of a coil of the electrical apparatus release are respectively connected to the static contact and the wiring terminal, so that the static contact, the wiring terminal and the electromagnetic release can be integrated and modularized, and the modularized assembly of the miniature circuit breaker can be realized.
Drawings
Fig. 1 is a perspective view of the internal structure of the embodiment of the present invention.
Fig. 2 is a front view of the internal structure of the embodiment of the present invention.
Detailed Description
As shown in fig. 1-2, an embodiment of the present invention is a miniature circuit breaker, including a housing 10, an operating mechanism 11, an arc extinguishing system 20, a moving contact 12 cooperating with the operating mechanism 11 in a linkage manner, a stationary contact 13 cooperating with the moving contact 12, and an electromagnetic trip 14, wherein the arc extinguishing system 20 includes an arc extinguishing chamber 21, a magnetic conductive plate 22, and an arc striking plate 23 disposed in the housing 10, one end of the magnetic conductive plate 22 is connected to the stationary contact 13, the other end of the magnetic conductive plate 22 extends to one end of the arc extinguishing chamber 21, one end of the arc striking plate 23 is bent and extended toward the moving contact 12, the other end of the arc striking plate 23 extends to the other end of the arc extinguishing chamber 21, an arc striking channel 200 is formed between the magnetic conductive plate 22 and the arc striking plate 23, a plurality of arc striking protrusions 101 are disposed in the corresponding arc striking channel 200 in the housing 10, the plurality of arc striking protrusions 101 are bent and extended toward the arc extinguishing chamber 21 from the moving contact 12, a plurality of arc ignition grooves 102 are formed between the plurality of arc ignition ridges 101, and the width of the arc ignition grooves 102 gradually increases from the driven contact 12 toward the arc extinguishing chamber 21.
As shown in fig. 1, an arc-striking angle 131 bent and extending toward the arc-extinguishing chamber 21 is provided at one end of the stationary contact 13, an arc-shaped contact portion 221 matched with the arc-striking angle 131 is provided at one end of the magnetic conductive plate 22, and the arc-shaped contact portion 221 is clamped in the arc-striking angle 131 to form a clamping fit between the magnetic conductive plate 22 and the stationary contact 13. The magnetic conduction plate and the static contact are connected in a clamping fit mode, so that the magnetic conduction plate and the static contact can be assembled conveniently, and the magnetic conduction plate can quickly introduce electric arcs on the static contact into the arc extinguishing chamber, so that the arc extinguishing effect of the miniature circuit breaker can be improved. An isolation convex strip 103 is arranged in the shell 10 corresponding to the position between the arc extinguish chamber 21 and the connecting terminal 15, an arc discharge channel 100 is formed between the isolation convex strip 103 and the arc extinguish chamber 21, and an arc discharge hole 104 communicated with the arc discharge channel 100 is arranged on the shell 10. The arc discharge channel can discharge residual electric arc outside the shell, thereby being beneficial to enhancing the arc extinguishing effect of the miniature circuit breaker. The other end of the static contact 13 is provided with a clamping portion 132, the clamping portion 132 is clamped in a clamping groove in the housing 10, and the static contact 13 is in clamping fit with the housing 10, one end of a coil 141 of the electromagnetic trip 14 is connected to the clamping portion 132 of the static contact 13, and the other end of the coil 141 is connected to the wiring terminal 15. Two ends of a coil of the electrical apparatus release are respectively connected to the static contact and the wiring terminal, so that the static contact, the wiring terminal and the electromagnetic release can be integrated and modularized, and the modularized assembly of the miniature circuit breaker can be realized.
Be formed with the striking passageway of a closed loop between magnetic conduction board and the striking board, the striking passageway can introduce electric arc in the explosion chamber fast, thereby can realize the quick extinguishing of electric arc, and be provided with a plurality of striking grooves in the striking passageway, and the width driven contact in striking groove is crescent to the explosion chamber direction, thereby electric arc on the moving contact can be introduced fast in the explosion chamber, be favorable to strengthening this miniature circuit breaker's arc extinguishing effect, thereby this miniature circuit breaker has simple structure, the stable performance is reliable, the assembly is convenient, high disconnected advantage.
Claims (4)
1. The utility model provides a miniature circuit breaker, includes casing, operating device, arc extinguishing system, with operating device linkage complex moving contact, with moving contact matched with static contact, electromagnetic trip, its characterized in that: arc extinguishing system including setting up explosion chamber, magnetic conductive plate, the striking plate in the casing, the one end of magnetic conductive plate connect on the stationary contact, the other end of magnetic conductive plate extends in one of explosion chamber, the one end of striking plate bend to the moving contact direction and extend, and the other end of striking plate extends on the other end of explosion chamber, and is formed with the striking passageway between magnetic conductive plate and the striking plate, the casing in correspond the striking passageway and be provided with a plurality of striking sand grips, a plurality of striking sand grip driven contact bend to the explosion chamber direction and extend, and be formed with a plurality of striking grooves between a plurality of striking sand grips, and the driven contact of width in striking groove increases gradually to the explosion chamber direction.
2. A miniature circuit breaker according to claim 1, wherein: one end of the static contact is provided with an arc striking angle which is bent and extended towards the arc extinguishing chamber, one end of the magnetic conduction plate is provided with an arc contact part which is matched with the arc striking angle, and the arc contact part is clamped in the arc striking angle and forms clamping matching of the magnetic conduction plate and the static contact.
3. A miniature circuit breaker according to claim 1 or 2, wherein: the shell is internally provided with an isolation convex strip corresponding to the position between the arc extinguish chamber and the wiring terminal, an arc discharge channel is formed between the isolation convex strip and the arc extinguish chamber, and the shell is provided with an arc discharge hole communicated with the arc discharge channel.
4. A miniature circuit breaker according to claim 1 or 2, wherein: the other end of the static contact is provided with a clamping part which is clamped in a clamping groove in the shell and forms clamping matching of the static contact and the shell, one end of a coil of the electromagnetic trip is connected to the clamping part of the static contact, and the other end of the coil is connected to the wiring terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121477475.1U CN215008118U (en) | 2021-06-30 | 2021-06-30 | Small-sized circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121477475.1U CN215008118U (en) | 2021-06-30 | 2021-06-30 | Small-sized circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215008118U true CN215008118U (en) | 2021-12-03 |
Family
ID=79105217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121477475.1U Active CN215008118U (en) | 2021-06-30 | 2021-06-30 | Small-sized circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215008118U (en) |
-
2021
- 2021-06-30 CN CN202121477475.1U patent/CN215008118U/en active Active
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