CN217158089U - Small-sized circuit breaker - Google Patents
Small-sized circuit breaker Download PDFInfo
- Publication number
- CN217158089U CN217158089U CN202220917715.3U CN202220917715U CN217158089U CN 217158089 U CN217158089 U CN 217158089U CN 202220917715 U CN202220917715 U CN 202220917715U CN 217158089 U CN217158089 U CN 217158089U
- Authority
- CN
- China
- Prior art keywords
- arc
- contact
- circuit breaker
- extension
- miniature circuit
- 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.)
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Links
- 230000003068 static effect Effects 0.000 claims abstract description 24
- 238000002788 crimping Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 2
- 238000010891 electric arc Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Images
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a miniature circuit breaker, be in including casing and setting quiet touch bar, setting on the casing wiring end are in arc-extinguish chamber in the casing is in with the setting the arc starting sheet of arc-extinguish chamber one side, the arc starting sheet includes basal portion, flexion and extension, the quiet touch bar is including line ball portion, location portion and contact site, one side of contact site is provided with the stationary contact, the contact site with the extension is laminated mutually, the end of extension is close to the stationary contact sets up. The utility model discloses miniature circuit breaker improves the structure of striking piece, and the one end that the striking piece is close to the stationary contact pole is equipped with the extension, and the extension extends to near the stationary contact on the stationary contact pole, strengthens the self-excitation magnetic field of striking piece upper end, and electric arc can cool off more fast and extinguish, has reduced the phenomenon that electric arc stagnates below the moving contact, and then has strengthened the arc extinguishing effect, has improved the breaking performance of switch; meanwhile, the volume and the size of the static contact rod are reduced, and the material cost is greatly reduced.
Description
Technical Field
The utility model relates to a low-voltage apparatus technical field, concretely relates to miniature circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time.
The arc striking structure on the existing miniature circuit breaker is characterized in that an arc striking sheet is arranged on one side of an arc extinguishing chamber, electric arc is generated between a moving contact and a static contact when the miniature circuit breaker is disconnected, and the electric arc enters the arc extinguishing chamber to be extinguished under the action of an excitation field of the arc striking sheet. However, the distance between the current stationary contact and the arc striking plate is far, the self-excitation field of the arc striking plate is weak, the arc striking plate is not beneficial to quickly striking off the arc from the stationary contact, the phenomenon that the arc is stagnated below the moving contact is caused, the moving contact or the static contact is easily burnt, the service life of the circuit breaker is influenced, and meanwhile, the breaking performance of the miniature circuit breaker is also reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a technical scheme does:
the utility model provides a miniature circuit breaker, includes the casing and sets up quiet touch bar, setting on the casing wiring end are in arc-extinguish chamber in the casing are in with the setting the striking piece of arc-extinguish chamber one side, the striking piece includes basal portion, flexion and extension, the quiet touch bar includes line ball portion, location portion and contact site, one side of contact site is provided with the stationary contact, the contact site with the laminating of extension portion mutually, the end of extension is close to the stationary contact sets up.
The utility model discloses set up further into the extension sets up the contact site is kept away from one side of stationary contact, the extension is located the contact site with between the inner wall of casing.
The utility model discloses further set up as the extension is kept away from a side surface of the inner wall of casing is equipped with the arch, the terminal surface of contact site with the arch is laminated mutually.
The utility model discloses further set up as the basal portion sets up the bottom of arc-extinguish chamber.
The utility model discloses further set up to the flexion with the bilateral symmetry of the junction of extension is provided with magnetic conduction portion, magnetic conduction portion is located respectively the open-ended both sides of arc-extinguish chamber.
The utility model discloses further set up as the place plane of magnetic conduction portion with the place plane mutually perpendicular of basal portion.
The utility model discloses further set up to be provided with binding post on the casing terminal, binding post includes interconnect's wiring frame and binding screw, the static contact pole the line ball portion is connected in the wiring frame, location portion connects the wiring frame with between the binding screw.
The utility model discloses further set up to line ball portion keeps away from one side of binding screw is equipped with the recess.
The utility model discloses further set up to still be provided with in the casing with the moving contact of static contact pole relative motion, the moving contact is located the top of striking piece.
The utility model discloses further set up to still including fixing yoke in the casing, the yoke sets up the top of arc-extinguish chamber.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
the technical scheme includes that the structure of an arc striking sheet is improved, an extension portion is arranged at one end, close to a static contact rod, of the arc striking sheet, the extension portion extends to the position close to a static contact on the static contact rod, and a self-excitation field at the upper end of the arc striking sheet is enhanced, so that electric arcs generated after the circuit breaker is disconnected can be quickly introduced into an arc extinguishing cover in the self-excitation field, the electric arcs can be cooled and extinguished more quickly, the phenomenon that the electric arcs are stagnated below a moving contact is reduced, the arc extinguishing effect is further enhanced, and the disconnection performance of a switch is improved; meanwhile, the volume and the size of the static contact rod are reduced, and the material cost is greatly reduced.
Drawings
Fig. 1 is the utility model discloses miniature circuit breaker inner structure schematic diagram.
Fig. 2 is a perspective view of an arc striking plate according to an embodiment of the present invention.
Fig. 3 is a perspective view of the stationary contact rod according to the embodiment of the present invention.
Fig. 4 is a perspective view of the arc striking plate and the stationary contact rod according to the embodiment of the present invention.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, integrally connected, or detachably connected; either mechanically or electrically, or internally communicating two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art will understand the specific meanings of the above terms according to specific situations.
With reference to fig. 1 to 4, the technical solution of the present invention is a miniature circuit breaker, including a housing 1, a static contact rod 2 disposed on a terminal of the housing 1, an arc extinguishing chamber 3 disposed in the housing 1, and an arc striking plate 4 disposed on one side of the arc extinguishing chamber 3, wherein the arc striking plate 4 includes a base portion 41, a bending portion 42, and an extending portion 43, the base portion 41 is disposed on the bottom of the arc extinguishing chamber 3, the static contact rod 2 includes a pressing portion 21, a positioning portion 22, and a contact portion 23, a static contact 24 is disposed on one side of the contact portion 23, the contact portion 23 is attached to the extending portion 43, the extending portion 43 is disposed on one side of the contact portion 23 away from the static contact 24, the extending portion 43 is disposed between the contact portion 23 and an inner wall of the housing 1, a side surface of the extending portion 43 away from the inner wall of the housing 1 is provided with a protrusion 44, the end surface of the contact portion 23 abuts against the projection 44, and the tip of the extension portion 43 is disposed near the stationary contact 24. An extension part is arranged at one end of the arc striking piece close to the static contact rod, the extension part extends to the position close to the static contact on the static contact rod, and the self-excitation field at the upper end of the arc striking piece is enhanced, so that electric arcs generated after the circuit breaker is disconnected can be quickly introduced into the arc extinguishing cover in the self-excitation field, and the electric arcs can be cooled and extinguished more quickly; and the arc striking piece is provided with a bulge for positioning the static contact rod, so that the positioning accuracy of the static contact rod is facilitated, and the static contact can be stably matched with the moving contact.
In this embodiment, two sides of the connection portion between the bending portion 42 and the extending portion 43 are symmetrically provided with magnetic conductive portions 45, the magnetic conductive portions 45 are respectively located at two sides of the opening of the arc-extinguishing chamber 3, and the plane where the magnetic conductive portions 45 are located is perpendicular to the plane where the base portion 41 is located. The magnetic conduction part can further strengthen the strength of the self-excitation magnetic field.
In this embodiment, a terminal 5 is disposed on the terminal of the housing 1, the terminal 5 includes a terminal frame 51 and a terminal screw 52 that are connected to each other, the crimping portion 21 of the stationary contact bar 2 is connected in the terminal frame 51, the positioning portion 22 is connected between the terminal frame 51 and the terminal screw 52, and a groove 25 is disposed on a side of the crimping portion 21 away from the terminal screw 52. The groove can increase the friction force of the wiring and ensure the reliability of electric connection.
In this embodiment, a movable contact 6 moving relative to the stationary contact rod 2 is further disposed in the housing 1, and the movable contact 6 is located above the arc striking plate 4.
In the present embodiment, the arc extinguishing chamber further comprises a yoke 7 fixed in the housing 1, and the yoke 7 is disposed above the arc extinguishing chamber 3.
In this embodiment, the distance from the end surface of the extension 43 to the magnetic conductive plate 45 is the length of the extension 43, i.e. the length of d1 and d1 is 13 mm.
In the present embodiment, after the stationary contact rod 2 is matched with the arc piece 4, the protruding distance from the central point of the stationary contact 24 on the stationary contact rod 2 to the extension 43 is d2, and the distance from d2 is 8 mm.
In this embodiment, what the striking piece 4 adopted is iron material, what static contact rod 2 adopted is red copper, and the static contact rod outside still needs silvering moreover, and the extension through the striking piece has reduced the size and the volume of static contact rod, greatly reduced material cost.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a miniature circuit breaker, its characterized in that is in including casing and setting static contact bar, setting on the casing wiring end are in arc-extinguishing chamber in the casing is in with the setting arc starting sheet of arc-extinguishing chamber one side, the arc starting sheet includes basal portion, flexion and extension, the static contact bar includes line ball portion, location portion and contact site, one side of contact site is provided with the stationary contact, the contact site with the laminating of extension portion, the end of extension is close to the stationary contact setting.
2. A miniature circuit breaker according to claim 1, wherein said extension is disposed on a side of said contact portion remote from said stationary contact, said extension being located between said contact portion and an inner wall of said housing.
3. A miniature circuit breaker according to claim 2, wherein a side surface of said extending portion remote from said inner wall of said case is provided with a projection, and an end surface of said contact portion is fitted with said projection.
4. A miniature circuit breaker according to claim 1, wherein said base is disposed at a bottom of said arc chute.
5. A miniature circuit breaker according to claim 1, wherein said curved portion and said extended portion are symmetrically provided with magnetically permeable portions at both sides of their junction, said magnetically permeable portions being located at both sides of said arc-extinguishing chamber opening, respectively.
6. A miniature circuit breaker according to claim 5 wherein the plane of said magnetically permeable portion and the plane of said base portion are perpendicular to each other.
7. A small size circuit breaker according to claim 1, wherein a terminal block is provided on the terminal end of the case, the terminal block includes a terminal frame and a terminal screw connected to each other, the crimping portion of the stationary contact bar is connected in the terminal frame, and the positioning portion is connected between the terminal frame and the terminal screw.
8. A miniature circuit breaker according to claim 7, wherein a recess is provided in a side of said crimping portion remote from said binding screw.
9. A miniature circuit breaker according to any one of claims 1 to 8, wherein a movable contact is further disposed in said housing for relative movement with respect to said stationary contact, said movable contact being located above said arc runner.
10. A miniature circuit breaker according to any of claims 1 to 8, further comprising a magnetic yoke secured within said housing, said magnetic yoke being disposed above said arc chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220917715.3U CN217158089U (en) | 2022-04-20 | 2022-04-20 | Small-sized circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220917715.3U CN217158089U (en) | 2022-04-20 | 2022-04-20 | Small-sized circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217158089U true CN217158089U (en) | 2022-08-09 |
Family
ID=82662367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220917715.3U Active CN217158089U (en) | 2022-04-20 | 2022-04-20 | Small-sized circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217158089U (en) |
-
2022
- 2022-04-20 CN CN202220917715.3U patent/CN217158089U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 325600 No. 18, Sha Hung Road, North white elephant Town, Yueqing City, Wenzhou, Zhejiang. Patentee after: Zhejiang Chuangqi Electric Co.,Ltd. Address before: 325600 No. 18, Sha Hung Road, North white elephant Town, Yueqing City, Wenzhou, Zhejiang. Patentee before: ZHEJIANG CHUANGQI ELECTRIC Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |