CN220856487U - Small-sized circuit breaker - Google Patents
Small-sized circuit breaker Download PDFInfo
- Publication number
- CN220856487U CN220856487U CN202322618426.0U CN202322618426U CN220856487U CN 220856487 U CN220856487 U CN 220856487U CN 202322618426 U CN202322618426 U CN 202322618426U CN 220856487 U CN220856487 U CN 220856487U
- Authority
- CN
- China
- Prior art keywords
- arc
- arc extinguishing
- base
- fixed contact
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001965 increasing effect Effects 0.000 claims description 17
- 238000005452 bending Methods 0.000 claims description 6
- 238000004880 explosion Methods 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 8
- 230000003068 static effect Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Landscapes
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to a miniature circuit breaker, which comprises a base, a cover body, an operating mechanism, an electromagnetic release, a moving contact, a fixed contact, an arc extinguishing chamber, an arc striking plate, a first connecting terminal and a second connecting terminal, wherein the cover body is arranged on the base, the operating mechanism, the electromagnetic release, the moving contact, the fixed contact, the arc extinguishing chamber comprises an arc isolating plate and a plurality of arc extinguishing grid sheets horizontally arranged in the arc isolating plate, a plurality of air outlet holes which are distributed in a staggered manner are respectively arranged on one side, far away from the fixed contact, of the arc isolating plate, an arc extinguishing channel is formed between the arc striking plate and the fixed contact, the arc extinguishing channel is communicated between the moving contact and the arc extinguishing chamber, one end of the arc striking plate is provided with an arc striking part which is penetrated below the arc extinguishing chamber, one side, facing the arc extinguishing channel, of the arc striking plate is provided with a convex strip, the automatic contact extends towards the direction of the arc extinguishing chamber, and a rivet is arranged between the base and the cover body and at the position, corresponding to the lower part of the arc striking plate. The utility model has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect and long service life.
Description
Technical Field
The utility model relates to the technical field of circuit breakers, in particular to a miniature circuit breaker.
Background
The miniature circuit breaker is also called miniature circuit breaker, is suitable for overload and short-circuit protection of the line with rated voltage of 230/400V of alternating current 50/60Hz and rated current not exceeding 63A, and can be used as infrequent operation conversion of the line under normal conditions. The miniature circuit breaker is mainly used in various places such as industry, business, high-rise and civil houses. When the existing miniature circuit breaker is switched on and off, electric arcs are obliquely blown on arc-extinguishing grid plates of an arc-extinguishing chamber, exhaust is unsmooth, the internal pressure of the circuit breaker is too high, a base at the position of an arc striking plate is easily expanded, the arc striking plate and a magnetic increasing plate are easily loosened and fall off, and even the arc striking plate and the magnetic increasing plate easily fall between moving and static contacts, so that the circuit breaker is scrapped. And the structural design of the arc striking plate is unreasonable, the arc striking plate can not lead the electric arc between the moving contact and the fixed contact into the arc extinguishing chamber rapidly, and the rapid extinction of the electric arc can not be realized.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a miniature circuit breaker which has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect and long service life.
In order to achieve the above purpose, the utility model adopts a miniature circuit breaker, which comprises a base, a cover body arranged on the base, an operating mechanism arranged in the base, an electromagnetic release, a moving contact, a fixed contact, an arc extinguishing chamber arranged in the base, an arc striking plate, a first wiring terminal and a second wiring terminal, wherein the arc extinguishing chamber comprises an arc isolating plate and a plurality of arc extinguishing grid plates horizontally arranged in the arc isolating plate, a plurality of air outlet holes which are distributed in a staggered manner are respectively arranged on one side, far away from the fixed contact, of the arc isolating plate, an arc extinguishing channel is formed between the arc striking plate and the fixed contact, the arc extinguishing channel is communicated between the moving contact and the arc extinguishing chamber, one end of the arc striking plate is provided with an arc striking part which is penetrated below the arc extinguishing chamber, one side, facing the arc extinguishing channel, of the arc striking plate is provided with a convex strip, the convex strip automatic contact extends towards the direction of the arc extinguishing chamber, and a rivet is arranged between the base and the cover body and at the position, which corresponds to the lower part of the arc striking plate.
The beneficial effects of the structure are as follows: be provided with the sand grip on striking board, this sand grip can introduce the arc that produces between the moving and static contact to the explosion chamber fast, is favorable to reinforcing arc extinguishing effect. And the arc extinguishing grating sheet of the arc extinguishing chamber is horizontally arranged in the arc-isolating plate, so that an arc is favorable for entering the arc extinguishing chamber quickly, the air outlet hole on the arc-isolating plate can discharge the air pressure in the arc extinguishing chamber, the air discharge is smoother, the base and the cover body are prevented from being expanded by the air pressure, the rivet is arranged at the position, corresponding to the arc-striking plate, on the base and the cover body, of the base, the overall strength of the connection of the base and the cover body can be effectively increased, the base and the cover body are prevented from being expanded, and the service life of the miniature circuit breaker is prolonged. Therefore, the miniature circuit breaker has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect and long service life.
Particularly, the base is internally provided with an exhaust cavity corresponding to the plurality of air outlet holes, and the base is provided with a plurality of exhaust holes communicated with the exhaust cavity. The exhaust hole can discharge the air pressure in the base, so that the arc can be ensured to enter the arc extinguishing chamber quickly, and the arc extinguishing performance of the miniature circuit breaker is improved.
Specifically, one end of the fixed contact is connected to the magnetic yoke of the electromagnetic release, the other end of the fixed contact is provided with a bending part which is bent and extended towards the arc extinguishing chamber, a magnetic increasing sheet is arranged in the bending part, and one end of the magnetic increasing sheet extends into the arc extinguishing chamber. The fixed contact is provided with the magnetic increasing sheet, and the magnetic increasing sheet can accelerate the electric arc to enter the arc extinguishing chamber rapidly, thereby being beneficial to enhancing the arc extinguishing effect of the miniature circuit breaker.
Particularly, an arc striking part is arranged at the other end of the magnetic increasing sheet corresponding to the fixed contact of the fixed contact, and the width of the arc striking part is larger than that of the fixed contact. The arc striking part can rapidly introduce the arc at the static contact into the arc extinguishing chamber, thereby playing a role in protecting the static contact and being beneficial to improving the arc extinguishing performance of the miniature circuit breaker.
Specifically, the two sides of the arc striking plate are respectively provided with an inserting piece part, the base and the cover body are respectively provided with an inserting groove matched with the inserting piece part, and the inserting piece part is inserted in the inserting groove to form the clamping fit of the arc striking plate and the base and the cover body. The arc striking plate is connected with the base and the cover body in a clamping fit mode, so that the arc striking plate is convenient to assemble with the base and the cover body, and the arc striking plate can be more compactly connected with the base and the cover body.
Drawings
FIG. 1 is an exploded view of an embodiment of the present utility model.
Fig. 2 is a front view of an internal structure of an embodiment of the present utility model.
Fig. 3 is a perspective view of an arc striking plate according to an embodiment of the present utility model.
Fig. 4 is a perspective view of an arc chute according to an embodiment of the present utility model.
Detailed Description
As shown in fig. 1 to 4, an embodiment of the present utility model is a miniature circuit breaker, including a base 10, a cover 11 disposed on the base 10, an operating mechanism 12 disposed in the base 10, an electromagnetic trip 121, a moving contact 13, a fixed contact 14, an arc extinguishing chamber 15 disposed in the base 10, an arc striking plate 16, a first connection terminal 17, and a second connection terminal 18, wherein the arc extinguishing chamber 15 includes an arc isolating plate 151, and a plurality of arc extinguishing gate plates 152 horizontally disposed in the arc isolating plate 151, a plurality of air outlet holes 153 are disposed on a side of the arc isolating plate 151 far from the fixed contact 14 and distributed in a staggered manner, an arc extinguishing channel 100 is formed between the arc striking plate 16 and the fixed contact 14, the arc extinguishing channel 100 is communicated between the moving contact 13 and the arc extinguishing chamber 15, one end of the arc striking plate 16 has an arc striking portion 161 inserted under the arc extinguishing chamber 15, the arc striking plate 16 is disposed on a side facing the channel 100, the arc extinguishing plate 162 extends from the automatic contact 13 toward the direction of the arc extinguishing chamber 15, and a rivet is disposed between the base 10 and the cover 11 and the arc striking plate 16. The base 10 is provided with an exhaust cavity 101 corresponding to the plurality of air outlet holes 153, and the base 10 is provided with a plurality of exhaust holes 102 communicated with the exhaust cavity 101. The exhaust hole can discharge the air pressure in the base, so that the arc can be ensured to enter the arc extinguishing chamber quickly, and the arc extinguishing performance of the miniature circuit breaker is improved. One end of the fixed contact 14 is connected to the magnetic yoke 122 of the electromagnetic release 121, the other end of the fixed contact 14 is provided with a bending part 141 which is bent and extended towards the arc extinguishing chamber 15, the bending part 141 is internally provided with a magnetic increasing sheet 20, and one end of the magnetic increasing sheet 20 is extended into the arc extinguishing chamber 15. The fixed contact is provided with the magnetic increasing sheet, and the magnetic increasing sheet can accelerate the electric arc to enter the arc extinguishing chamber rapidly, thereby being beneficial to enhancing the arc extinguishing effect of the miniature circuit breaker. The other end of the magnetic increasing sheet 20 is provided with an arc striking part 201 corresponding to the fixed contact 142 of the fixed contact 14, and the width of the arc striking part 201 is larger than that of the fixed contact 14. The arc striking part can rapidly introduce the arc at the static contact into the arc extinguishing chamber, thereby playing a role in protecting the static contact and being beneficial to improving the arc extinguishing performance of the miniature circuit breaker. The two sides of the arc striking plate 16 are respectively provided with an inserting piece part 163, the base 10 and the cover 11 are respectively provided with an inserting slot 103 matched with the inserting piece part 163, and the inserting piece part 163 is inserted into the inserting slot 103 to form the clamping fit of the arc striking plate 16 and the base 10 and the cover 11. The arc striking plate is connected with the base and the cover body in a clamping fit mode, so that the arc striking plate is convenient to assemble with the base and the cover body, and the arc striking plate can be more compactly connected with the base and the cover body.
Be provided with the sand grip on striking board, this sand grip can introduce the arc that produces between the moving and static contact to the explosion chamber fast, is favorable to reinforcing arc extinguishing effect. And the arc extinguishing grating sheet of the arc extinguishing chamber is horizontally arranged in the arc-isolating plate, so that an arc is favorable for entering the arc extinguishing chamber quickly, the air outlet hole on the arc-isolating plate can discharge the air pressure in the arc extinguishing chamber, the air discharge is smoother, the base and the cover body are prevented from being expanded by the air pressure, the rivet is arranged at the position, corresponding to the arc-striking plate, on the base and the cover body, of the base, the overall strength of the connection of the base and the cover body can be effectively increased, the base and the cover body are prevented from being expanded, and the service life of the miniature circuit breaker is prolonged. Therefore, the miniature circuit breaker has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect and long service life.
Claims (5)
1. The utility model provides a miniature circuit breaker, includes the base, sets up lid on the base, sets up operating device, electromagnetic release, moving contact, stationary contact in the base, sets up explosion chamber, striking board, first binding post, the second binding post in the base, its characterized in that: the arc extinguishing chamber comprises an arc isolation plate and a plurality of arc extinguishing grid plates horizontally arranged in the arc isolation plate, wherein a plurality of air outlet holes which are distributed in a staggered mode are respectively arranged on one side, far away from the fixed contact, of the arc isolation plate, an arc extinguishing channel is formed between the arc extinguishing plate and the fixed contact, the arc extinguishing channel is communicated between the moving contact and the arc extinguishing chamber, one end of the arc extinguishing plate is provided with an arc striking part which is inserted below the arc extinguishing chamber, one side, facing the arc extinguishing channel, of the arc striking plate is provided with a convex strip, the convex strip automatic contact extends towards the direction of the arc extinguishing chamber, and a rivet is arranged between the base and the cover body and corresponds to the lower part of the arc striking plate.
2. The miniature circuit breaker of claim 1, wherein: the base is internally provided with a plurality of exhaust holes which are communicated with the exhaust cavity, and the exhaust cavity is arranged at the position corresponding to the plurality of air outlet holes.
3. Miniature circuit breaker according to claim 1 or 2, characterized in that: the fixed contact one end connect on the yoke of electromagnetic release, the fixed contact other end have to the explosion chamber bend the portion of bending that extends, the portion of bending in be provided with the magnetic increasing piece, magnetic increasing piece one end extend in the explosion chamber.
4. A miniature circuit breaker according to claim 3, characterized in that: and an arc striking part is arranged at the other end of the magnetic increasing sheet corresponding to the fixed contact of the fixed contact, and the width of the arc striking part is larger than that of the fixed contact.
5. Miniature circuit breaker according to claim 1 or 2, characterized in that: the arc striking plate is characterized in that the two sides of the arc striking plate are respectively provided with an inserting piece part, the base and the cover body are respectively provided with an inserting groove matched with the inserting piece part, and the inserting piece part is inserted in the inserting groove to form the clamping fit of the arc striking plate with the base and the cover body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322618426.0U CN220856487U (en) | 2023-09-26 | 2023-09-26 | Small-sized circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322618426.0U CN220856487U (en) | 2023-09-26 | 2023-09-26 | Small-sized circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220856487U true CN220856487U (en) | 2024-04-26 |
Family
ID=90742410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322618426.0U Active CN220856487U (en) | 2023-09-26 | 2023-09-26 | Small-sized circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220856487U (en) |
-
2023
- 2023-09-26 CN CN202322618426.0U patent/CN220856487U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108648969B (en) | Double-breakpoint miniature circuit breaker | |
| CN218769250U (en) | Heavy current circuit breaker | |
| CN220856487U (en) | Small-sized circuit breaker | |
| CN213184182U (en) | Switch electric appliance | |
| CN207676871U (en) | A kind of miniature circuit breaker | |
| WO2021237980A1 (en) | Magnetic blow-out mechanism of circuit breaker | |
| CN208336078U (en) | A kind of breaker of plastic casing static contact arc eliminating module | |
| CN208336117U (en) | A kind of breaker of plastic casing | |
| CN220796632U (en) | High-reliability miniature circuit breaker | |
| CN216213228U (en) | Small-sized current-limiting and rapid arc-extinguishing circuit breaker | |
| CN215008118U (en) | Small-sized circuit breaker | |
| CN219066738U (en) | Direct current breaker with high protection function | |
| CN219842946U (en) | Circuit breaker | |
| CN217035573U (en) | Contact system of circuit breaker | |
| CN208000887U (en) | A kind of high-breaking miniature breaker | |
| CN217114265U (en) | High-power double-wiring terminal breaker | |
| CN211907370U (en) | High-breaking molded case circuit breaker | |
| CN219759510U (en) | Small-sized circuit breaker | |
| CN209947776U (en) | Arc extinguishing mechanism of miniature circuit breaker | |
| CN214505420U (en) | N-pole switch module of automatic reclosing miniature circuit breaker | |
| CN219106053U (en) | Arc extinguishing mechanism and circuit breaker | |
| CN217182110U (en) | High-breaking molded case circuit breaker | |
| CN216311704U (en) | Small-sized circuit breaker | |
| CN217768273U (en) | Small-sized circuit breaker | |
| CN213184178U (en) | Contact mechanism and switching device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |