CN213459605U - Small-sized circuit breaker - Google Patents
Small-sized circuit breaker Download PDFInfo
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- CN213459605U CN213459605U CN202023042979.9U CN202023042979U CN213459605U CN 213459605 U CN213459605 U CN 213459605U CN 202023042979 U CN202023042979 U CN 202023042979U CN 213459605 U CN213459605 U CN 213459605U
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- separation plate
- static contact
- arc
- circuit breaker
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Abstract
The utility model relates to a miniature circuit breaker, which comprises a shell, an electromagnetic system, a static contact and an arc extinguishing cover, the shell comprises a base and an outer cover which are connected with each other, a bottom separation plate and an upper separation plate are respectively formed in the base and the outer cover, the bottom separation plate and the top separation plate are connected to form a complete separation plate which is arranged between the electromagnetic system and the static contact, an inclined slot is formed on the base at a position close to the arc-extinguishing cover, a horizontal slot is formed on one side of the base close to the bottom separation plate, the static contact comprises a wiring part, a bearing part, a bending part, a positioning part and an extending part which are connected in sequence, the wiring part is provided with a plugging end which is connected in the horizontal slot, the bearing part is provided with a static contact, the positioning part is connected in the inclined slot, and the extending part is arranged right above the arc extinguishing cover and below the partition plate. The utility model discloses miniature circuit breaker's static contact location is reliable, and reducible electromagnetic system improves the arc extinguishing effect to the interference of arc extinguishing system.
Description
Technical Field
The utility model relates to a low pressure electrical technology field especially relates to a miniature circuit breaker.
Background
The miniature circuit breaker has the characteristics of advanced structure, reliable performance, strong breaking capacity, attractive and small appearance and the like, can be used for the overload and short-circuit protection of illumination, distribution lines and equipment of office buildings, houses and similar buildings, and can also be used for the infrequent on-off operation and conversion of the lines. The method is mainly used in various places such as industrial, commercial, high-rise and civil houses. The miniature circuit breaker generally comprises a shell, and an operating mechanism, an electromagnetic system, an overload protection mechanism and an arc extinguishing system which are arranged in the shell.
The existing miniature circuit breaker has the following defects: 1. the positioning of the static contact on the shell is unreliable, which can affect the normal closing and breaking of the contact system of the miniature circuit breaker; 2. the arc extinguishing system carries out the arc extinguishing transient to the disconnected electric arc that produces of miniature circuit breaker, receives the electromagnetic system coil production interference easily, and the arc extinguishing bars piece on the arc extinguishing cover can be by this interference magnetization, influences the arc extinguishing effect of arc extinguishing cover to electric arc.
Disclosure of Invention
In view of this, the utility model aims at providing a miniature circuit breaker makes the static contact location reliable, and reducible electromagnetic system improves the arc extinguishing effect to the interference of arc extinguishing system.
In order to achieve the above object, the present invention provides a miniature circuit breaker, comprising a housing, an electromagnetic system disposed in the housing, a static contact disposed below the electromagnetic system, and an arc-extinguishing chamber disposed below the static contact, wherein the housing comprises a base and an outer cover connected to each other, a bottom separation plate and an upper separation plate are respectively formed in the base and the outer cover, the bottom separation plate and the upper separation plate are connected to form a complete separation plate disposed between the electromagnetic system and the static contact, an inclined slot is formed at a position on the base close to the arc-extinguishing chamber, a horizontal slot is formed at a side of the base close to the bottom separation plate, the static contact comprises a wiring portion, a bearing portion, a bending portion, a positioning portion, and an extending portion connected in sequence, the wiring portion is formed with an insertion end, the insertion end is connected in the horizontal slot, the bearing portion is formed with a static contact, the extension part is arranged right above the arc extinguishing chamber and below the partition plate.
The miniature circuit breaker improves the structure of an electromagnetic system, a static contact and an arc-extinguishing cover on a shell, the extension parts of a partition plate and the static contact, which are formed by the lower partition plate and the upper partition plate, are arranged between the electromagnetic system and the arc-extinguishing cover, so that a double-layer partition is formed between the electromagnetic system and the arc-extinguishing cover, the magnetization influence of a magnetic field generated on the electromagnetic system on an arc-extinguishing grid piece at the upper end of the arc-extinguishing cover is reduced, meanwhile, the extension parts have an arc-blocking effect on electric arcs, so that the electric arcs fully enter the arc-extinguishing cover for arc extinguishing, and the double effects of the extension parts can greatly improve; the inclined slot and the horizontal slot are used for positioning the static contact, so that the static contact is limited to move on the base, the static contact is stably positioned, and the opening and closing operation reliability of the miniature circuit breaker is improved.
The utility model discloses further set up to one side that the top separation board is close to the extension and one side that the bottom separation board is close to the extension form flat groove and flat groove down respectively, go up flat groove and flat groove constitution complete flat groove down, the extension is connected at the flat inslot.
The upper flat groove and the lower flat groove form a complete flat groove to limit the position of the extension part, so that the positioning stability of the static contact on the shell is further improved.
This practicality further sets up to be provided with the run-on plate for one side of arc-extinguish chamber, the kink is by buckling the setting to the run-on plate.
The bending part of the static contact is bent towards the arc striking plate to play an arc striking role, so that the broken electric arc enters the arc extinguishing chamber along the arc striking plate to extinguish the arc.
This practicality further sets up to the width that the width of extension is greater than location portion.
The extension part of the wide body can better block the arc.
This practicality further sets up to wiring portion and the last coil electricity of electromagnetic system and is connected.
The wiring portion of the static contact is used for positioning on the base and also serves as a contact point electrically connected with the electromagnetic system.
Drawings
Fig. 1 is an exploded view of an embodiment of the present invention.
Fig. 2 is an exploded view of another angle of the embodiment of the present invention.
Fig. 3 is a perspective view of a fixed contact according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-3, the present invention relates to a miniature circuit breaker, which comprises a housing, an electromagnetic system 3 disposed in the housing, a fixed contact 4 disposed below the electromagnetic system 3, and an arc-extinguishing chamber 5 disposed below the fixed contact 4, wherein the housing comprises a base 1 and an outer cover 2 connected to each other, a bottom separation plate 11 and an upper separation plate 21 are respectively formed in the base 1 and the outer cover 2, the bottom separation plate 11 and the upper separation plate 21 are connected to form a complete separation plate disposed between the electromagnetic system 3 and the fixed contact 4, an inclined slot 12 is formed at a position on the base 1 close to the arc-extinguishing chamber 5, a horizontal slot 13 is formed at a side of the base 1 close to the bottom separation plate 11, the fixed contact 4 comprises a wiring portion 41, a bearing portion 42, a bending portion 43, a positioning portion 44, and an extension portion 45 connected in sequence, the width of the extension portion 45 is, the wiring portion 45 is electrically connected with a coil on the electromagnetic system 3, a plugging end 411 is formed on the wiring portion 41, the plugging end 411 is connected in the horizontal slot 13, a stationary contact 421 is formed on the bearing portion 42, the positioning portion 44 is connected in the inclined slot 12, an upper flat slot 211 and a lower flat slot 111 are respectively formed on one side of the upper separation plate 21 close to the extension portion 45 and one side of the lower separation plate 11 close to the extension portion 45, the upper flat slot 211 and the lower flat slot 111 form a complete flat slot, the extension portion 45 is connected in the flat slot, the extension portion 45 is arranged right above the arc extinguishing cover 5 and below the separation plate, an arc striking plate 6 is arranged on one side of the arc extinguishing cover 5, and the bending portion 43 is bent towards the arc striking plate 6.
According to the above embodiment, the utility model discloses a miniature circuit breaker improves electromagnetic system, static contact, the structure of arc-extinguishing cover on the shell, division board that bottom separation board and top separation board constitute and the extension of static contact are between electromagnetic system and arc-extinguishing cover, make to form double-deck wall between electromagnetic system and the arc-extinguishing cover, reduce the magnetic field that produces on the electromagnetic system and to the magnetization influence of arc-extinguishing bars piece of arc-extinguishing cover upper end, the extension has the effect of keeping off the arc to the electric arc simultaneously, let electric arc fully enter the arc-extinguishing cover and carry out the arc extinguishing, the dual function of extension can improve the arc extinguishing effect of arc-extinguishing cover greatly; the inclined slot and the horizontal slot are used for positioning the static contact, so that the static contact is limited to move on the base, the static contact is stably positioned, the reliability of opening and closing actions of the miniature circuit breaker is improved, the upper flat slot and the lower flat slot form a complete flat slot to limit the position of the extension part, and the stability of the static contact in positioning on the shell is further improved.
In addition to the above embodiments, there are also other embodiments of the present invention, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and scope of the present invention, such as providing the horizontal slot and the inclined slot on the upper cover, and these corresponding changes and modifications shall fall within the protection scope of the appended claims.
Claims (5)
1. The utility model provides a miniature circuit breaker, includes the shell and sets up electromagnetic system in the shell, set up static contact, the arc-extinguishing chamber of setting in the static contact below of electromagnetic system, its characterized in that: the shell comprises a base and an outer cover which are connected with each other, a bottom separation plate and an upper separation plate are respectively formed in the base and the outer cover, the bottom separation plate and the upper separation plate are connected to form a complete separation plate and are arranged between an electromagnetic system and a static contact, an inclined slot is formed in a position, close to the arc extinguishing cover, of the base, a horizontal slot is formed in one side, close to the bottom separation plate, of the base, the static contact comprises a wiring portion, a bearing portion, a bending portion, a positioning portion and an extension portion, the wiring portion is provided with an inserting end, the inserting end is connected into the horizontal slot, the bearing portion is provided with a static contact, the positioning portion is connected into the inclined slot, and the extension portion is arranged right above the arc extinguishing cover and is located below.
2. A miniature circuit breaker according to claim 1, wherein: an upper flat groove and a lower flat groove are formed in one side, close to the extending portion, of the upper separation plate and one side, close to the extending portion, of the lower separation plate respectively, the upper flat groove and the lower flat groove form a complete flat groove, and the extending portion is connected into the flat groove.
3. A miniature circuit breaker according to claim 1 or 2, wherein: one side of the arc extinguishing chamber is provided with an arc striking plate, and the bent part is bent towards the arc striking plate.
4. A miniature circuit breaker according to claim 1 or 2, wherein: the width of the extension part is larger than that of the positioning part.
5. A miniature circuit breaker according to claim 1 or 2, wherein: the wiring portion is electrically connected with a coil on the electromagnetic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023042979.9U CN213459605U (en) | 2020-12-17 | 2020-12-17 | Small-sized circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023042979.9U CN213459605U (en) | 2020-12-17 | 2020-12-17 | Small-sized circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213459605U true CN213459605U (en) | 2021-06-15 |
Family
ID=76304828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023042979.9U Active CN213459605U (en) | 2020-12-17 | 2020-12-17 | Small-sized circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213459605U (en) |
-
2020
- 2020-12-17 CN CN202023042979.9U patent/CN213459605U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |