CN218826926U - High-reliability miniature circuit breaker - Google Patents
High-reliability miniature circuit breaker Download PDFInfo
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- CN218826926U CN218826926U CN202223284024.3U CN202223284024U CN218826926U CN 218826926 U CN218826926 U CN 218826926U CN 202223284024 U CN202223284024 U CN 202223284024U CN 218826926 U CN218826926 U CN 218826926U
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- movable contact
- spring
- circuit breaker
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Abstract
The utility model relates to a high reliability miniature circuit breaker, including base, upper cover, operating device, electric leakage circuit board module of setting on the base, with operating device linkage complex contact frame, with contact frame linkage complex movable contact spring, static contact, the binding post that is connected with the static contact, movable contact spring one end fixed part of connection in the base has, the movable contact spring other end has the contact site of extending to the static contact direction, this contact site up end is provided with the movable contact, and the contact site terminal surface is provided with the shell fragment down, shell fragment one end extend and have the cambered surface bellying of contradicting on the movable contact spring to the fixed part direction, static contact one end bend and be formed with the stationary contact to the movable contact direction, be provided with on this stationary contact with movable contact matched with stationary contact. The utility model has the advantages of simple structure, stable performance, reliability, convenient assembly and long service life.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to miniature circuit breaker.
Background
The miniature circuit breaker is also called a miniature circuit breaker, is suitable for overload and short-circuit protection of a line with the rated voltage of alternating current 50/60Hz of 230/400V and the rated current of not more than 125A, and can also be used for infrequent operation and conversion of the line under normal conditions. The miniature circuit breaker is mainly used in various places such as industrial, commercial, high-rise and civil houses. The contact pressure of the moving contact of the existing miniature circuit breaker is too small, the conduction capability of the moving contact and the static contact is poor, and fusion welding is easily generated between the moving contact and the static contact, so that the service life of the miniature circuit breaker is short.
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, long service life's high reliability miniature circuit breaker.
For realizing above-mentioned mesh, the utility model discloses a high reliability miniature circuit breaker, including base, upper cover, operating device, electric leakage circuit board module of setting on the base, with operating device linkage complex contact frame, with contact frame linkage complex movable contact spring, static contact, the binding post that is connected with the static contact, movable contact spring one end fixed part of connection in the base has, the movable contact spring other end has the contact site that extends to the static contact direction, this contact site up end is provided with the movable contact, and the contact site terminal surface is provided with the shell fragment down, shell fragment one end extend and have the cambered surface bellying of contradicting on the movable contact spring to the fixed part direction, static contact one end bend to the movable contact direction and be formed with the stationary contact, be provided with on this stationary contact with movable contact matched with stationary contact.
The beneficial effect of above-mentioned structure is: the elastic sheet is arranged on the movable reed, and the contact pressure of the movable reed can be increased by the elastic sheet, so that the movable reed and the static contact can be more reliably contacted, the fusion welding phenomenon between the movable reed and the static contact can be avoided, and the service life of the miniature circuit breaker can be prolonged. And the bending and inclining design of the static contact part of the static contact can realize the scraping type contact of the movable contact and the static contact, and the movable contact can scrape off dust or sundries on the static contact, thereby being beneficial to improving the conduction capability of the movable contact and the static contact. Therefore, the miniature circuit breaker has the advantages of simple structure, stable and reliable performance, convenience in assembly and long service life.
Particularly, the other end of the static contact is provided with a wiring part inserted in the wiring terminal, a wire pressing cavity is formed between the wiring part and the wiring terminal, and the static contact is provided with a blocking piece sheltered on one side of the wire pressing cavity. The static contact is provided with the separation blade, and when wiring, the separation blade can prevent the wire from penetrating out of the wire pressing cavity, so that the wiring part can be ensured to be more reliably contacted with the wire.
Particularly, the contact head frame is provided with a clamping groove matched with the movable spring, and one end of the movable spring is clamped in the clamping groove. The movable contact spring is connected with the contact frame in a clamping matching mode, so that the movable contact spring and the contact frame are convenient to assemble, and the assembly is more convenient.
Particularly, a strip-shaped hole is formed in the bending part of the static contact and is arranged between the blocking piece and the static contact part. The strip-shaped hole is formed in the bending position of the static contact, so that the bending forming of the static contact is facilitated.
Particularly, the fixing part on be provided with the fixed orifices, be provided with the bolt in the fixed orifices, the base in correspond fixed part department and be provided with the lug, be provided with the through-hole on the lug, the bolt pass fixed orifices, through-hole in proper order and screw and have the nut. The movable spring plate is fixed on the convex block of the base through the bolt, so that the movable spring plate and the base are convenient to assemble, and the assembly is more convenient.
Particularly, the lug is provided with a supporting inclined plane matched with the fixing part, and the fixing part is attached to the supporting inclined plane. The fixed part of the movable spring is fixed on the supporting inclined plane of the bump, so that the movable spring is more compactly connected with the fixed part.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is a sectional view of the embodiment of the present invention.
Fig. 3 is an internal structure diagram of the embodiment of the present invention.
Fig. 4 is a perspective view of the movable spring plate according to the embodiment of the present invention.
Fig. 5 is a perspective view of a connection terminal according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-5, an embodiment of the present invention is a high reliability miniature circuit breaker, including a base 10, an upper cover 11, an operating mechanism 12, an electric leakage circuit board module 120, a contact frame 13 cooperating with the operating mechanism 12, a movable contact 14 cooperating with the contact frame 13, a static contact 15, and a connection terminal 16 connected to the static contact 15, where one end of the movable contact 14 has a fixing portion 141 connected in the base 10, the other end of the movable contact 14 has a contact portion 142 extending towards the static contact 15, the upper end surface of the contact portion 142 is provided with a movable contact 143, and the lower end surface of the contact portion 142 is provided with an elastic sheet 17, one end of the elastic sheet 17 extends towards the fixing portion 141 and has an arc protruding portion 171 abutting against the movable contact 14, one end of the static contact 15 is bent towards the movable contact 143 and is formed with a static contact 151, and a static contact 152 cooperating with the movable contact 143 is provided on the static contact 151. The other end of the fixed contact 15 has a wire connecting portion 153 inserted into the wire connecting terminal 16, a wire pressing cavity 160 is formed between the wire connecting portion 153 and the wire connecting terminal 16, and the fixed contact 15 has a blocking piece 154 blocked on one side of the wire pressing cavity 160. The static contact is provided with the separation blade, and when wiring, the separation blade can prevent the wire from penetrating out of the wire pressing cavity, so that the wiring part can be ensured to be more reliably contacted with the wire. The contact frame 13 is provided with a clamping groove 131 matched with the movable spring 14, and one end of the movable spring 14 is clamped in the clamping groove 131. The movable contact spring is connected with the contact frame in a clamping matching mode, so that the movable contact spring and the contact frame can be assembled conveniently, and the assembly is more convenient. The bending part of the static contact 15 is provided with a strip-shaped hole 155, and the strip-shaped hole 155 is arranged between the blocking piece 154 and the static contact part 151. The strip-shaped hole is formed in the bending position of the static contact, so that the bending forming of the static contact is facilitated.
As shown in fig. 1 and 4, a fixing hole 144 is formed in the fixing portion 141, a bolt 18 is disposed in the fixing hole 144, a protrusion 101 is disposed in the base 10 corresponding to the fixing portion 141, a through hole 102 is disposed on the protrusion 101, and the bolt 18 sequentially passes through the fixing hole 144 and the through hole 102 and is screwed with a nut 19. The movable reed is fixed on the convex block of the base through the bolt, so that the movable reed and the base can be assembled conveniently, and the assembly is more convenient. The bump 101 is provided with a supporting inclined plane 103 matched with the fixing part 141, and the fixing part 141 is attached to the supporting inclined plane 103. The fixed part of the movable spring is fixed on the supporting inclined plane of the lug, so that the movable spring is more compactly connected with the fixed part.
The elastic sheet is arranged on the movable reed, and the contact pressure of the movable reed can be increased by the elastic sheet, so that the movable reed and the static contact can be more reliably contacted, the fusion welding phenomenon between the movable reed and the static contact can be avoided, and the service life of the miniature circuit breaker can be prolonged. And the bending and inclining design of the static contact part of the static contact can realize the scraping type contact of the movable contact and the static contact, and the movable contact can scrape off dust or sundries on the static contact, thereby being beneficial to improving the conduction capability of the movable contact and the static contact. Therefore, the miniature circuit breaker has the advantages of simple structure, stable and reliable performance, convenience in assembly and long service life.
Claims (6)
1. The utility model provides a high reliability miniature circuit breaker, includes the base, sets up upper cover, operating device, electric leakage circuit board module on the base, with operating device linkage complex contact frame, with contact frame linkage complex movable contact spring, static contact, the binding post that is connected with the static contact, its characterized in that: the movable contact spring is characterized in that one end of the movable contact spring is provided with a fixed part connected in the base, the other end of the movable contact spring is provided with a contact part extending towards the direction of the fixed contact, the upper end face of the contact part is provided with a movable contact, the lower end face of the contact part is provided with an elastic sheet, one end of the elastic sheet extends towards the direction of the fixed part and is provided with a cambered surface protruding part abutting against the movable contact spring, one end of the fixed contact spring is bent towards the direction of the movable contact and is formed with a fixed contact part, and the fixed contact part is provided with a fixed contact matched with the movable contact.
2. The high reliability small size circuit breaker according to claim 1, wherein: the static contact other end have the wiring portion of interlude in binding post, wiring portion and binding post between be formed with the line ball chamber, the static contact on have the separation blade of sheltering from on line ball chamber one side.
3. A high reliability small size circuit breaker according to claim 1 or 2, wherein: the contact frame is provided with a clamping groove matched with the movable spring, and one end of the movable spring is clamped in the clamping groove.
4. A high reliability small size circuit breaker according to claim 1 or 2, wherein: the bending part of the static contact is provided with a strip-shaped hole which is arranged between the separation blade and the static contact part.
5. A high reliability small size circuit breaker according to claim 1 or 2, wherein: the fixing part on be provided with the fixed orifices, be provided with the bolt in the fixed orifices, the base in correspond fixed part department and be provided with the lug, be provided with the through-hole on the lug, the bolt pass fixed orifices, through-hole in proper order and screw and have the nut.
6. The high reliability miniature circuit breaker of claim 5, wherein: the lug is provided with a supporting inclined plane matched with the fixing part, and the fixing part is attached to the supporting inclined plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223284024.3U CN218826926U (en) | 2022-12-07 | 2022-12-07 | High-reliability miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223284024.3U CN218826926U (en) | 2022-12-07 | 2022-12-07 | High-reliability miniature circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218826926U true CN218826926U (en) | 2023-04-07 |
Family
ID=87247370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223284024.3U Active CN218826926U (en) | 2022-12-07 | 2022-12-07 | High-reliability miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218826926U (en) |
-
2022
- 2022-12-07 CN CN202223284024.3U patent/CN218826926U/en active Active
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| GR01 | Patent grant |