CN219476586U

CN219476586U - Circuit breaker

Info

Publication number: CN219476586U
Application number: CN202223524919.XU
Authority: CN
Inventors: 黄燮云; 周文
Original assignee: Tam Electric Wuhu Co ltd
Current assignee: Tam Electric Wuhu Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-08-04
Anticipated expiration: 2032-12-22

Abstract

The application discloses circuit breaker, this circuit breaker includes: the shell is arranged on the middle partition plate in the shell, the inner cavity of the shell is respectively provided with a first cavity and a second cavity, a leakage circuit board is arranged in the first cavity, and an arc extinguishing chamber is arranged in the second cavity. This application has realized having reduced the occupation space of electric leakage circuit board and explosion chamber on casing length direction, makes the circuit breaker accomplish littleer on the length, is convenient for install the technological effect in the limited block terminal in space, and then has solved in the correlation technique that the circuit breaker receives the influence that explosion chamber and earth leakage protection circuit board distribute and lead to length longer, the inconvenient problem of wiring in some less block terminal in space.

Description

Circuit breaker

Technical Field

The application relates to the technical field of electrical equipment, in particular to a circuit breaker.

Background

Most of the current circuit breakers in the market have total lengths of 115-120 mm, and the RCBO is relatively long in a distribution box, so that the space of the distribution box is relatively limited, and the wiring is relatively inconvenient. The reason why the total length of the circuit breaker is difficult to be reduced is that the arc extinguishing chamber and the leakage protection circuit board in the circuit breaker are located at the same side, i.e., the arc extinguishing chamber and the leakage protection circuit board are distributed along the length direction of the circuit breaker. In order to ensure the usability of the circuit breaker, the length of the arc extinguishing chamber and the leakage protection circuit board needs to be limited within a certain range, so that the whole length of the circuit breaker cannot be well reduced.

Disclosure of Invention

The main aim of this application is to provide a circuit breaker to solve among the correlation technique circuit breaker and receive explosion chamber and the influence that earth leakage protection circuit board distributes and lead to length longer, the inconvenient problem of wiring in the less block terminal in some spaces.

In order to achieve the above object, the present application provides a circuit breaker including: the shell is arranged on the middle partition plate in the shell, the inner cavity of the shell is respectively provided with a first cavity and a second cavity, a leakage circuit board is arranged in the first cavity, and an arc extinguishing chamber is arranged in the second cavity.

Further, the length of the housing is less than 90mm.

Further, the length of the shell is less than or equal to 85mm.

Further, an N-pole contact is arranged in the first cavity, an operating mechanism is arranged on the shell, the operating mechanism comprises an N-pole contact positioned in the first cavity and an operating handle extending out of the shell, and the N-pole contact can be contacted with the N-pole contact or disconnected with the N-pole contact along with the action of the operating handle.

Further, an L-pole contact is arranged in the second cavity, the operating mechanism further comprises an L-pole contact positioned in the second cavity, and the L-pole contact can be contacted with the L-pole contact or disconnected from the L-pole contact along with the action of the operating handle.

Further, the operating mechanism further comprises a contact support, the contact support is hinged to the shell through a rotating shaft, and the operating handle is connected with the contact support and used for driving the contact support to rotate around the rotating shaft;

the N pole contact and the L pole contact are respectively arranged on two sides of the contact support.

Further, a shifting fork is arranged at the part of the contact support, which is positioned in the first cavity, and a shifting fork groove is formed in the lower end of the shifting fork;

the N pole contact is hinged to the middle partition board, the first end of the N pole contact extends into the shifting fork groove, and the second end of the N pole contact extends to a position corresponding to the N pole contact.

Further, an arc-driving inclined plane is formed at the second end of the N-pole contact at one side facing the N-pole contact.

Further, a mounting protrusion is arranged on one side of the middle partition plate, which is positioned on the first cavity, and the middle part of the N-pole contact is arranged on the mounting protrusion;

the operating mechanism further comprises a positioning cover, the positioning cover is buckled at the middle part of the N pole contact and the mounting protrusion, and the positioning cover is rotationally connected with the mounting protrusion.

Further, a first positioning groove and a second positioning groove are respectively formed in the upper end and the lower end of the positioning cover, the first end of the N-pole contact penetrates through the first positioning groove, and the second end of the N-pole contact penetrates through the second positioning groove.

In this application embodiment, through setting up the casing, locate the middle baffle in the casing, the middle baffle will the inner chamber of casing is first cavity and second cavity respectively, be provided with the electric leakage circuit board in the first cavity, be provided with the explosion chamber in the second cavity, reached the overall arrangement of electric leakage circuit board and explosion chamber in the adjustment circuit breaker, make the two mesh in first cavity and the second cavity that are arranged in the casing both sides respectively to realized having reduced the occupation space of electric leakage circuit board and explosion chamber in casing length direction, made the circuit breaker possible littleer on the length, the technological effect of being convenient for install in the limited block terminal in space, and then solved the circuit breaker and receive the influence that explosion chamber and electric leakage protection circuit board distribute to lead to length longer in the less block terminal of some spaces, the inconvenient problem of wiring in some space.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:

FIG. 1 is a schematic view of a structure of one side according to an embodiment of the present application;

FIG. 2 is a schematic diagram of another side structure according to an embodiment of the present application;

FIG. 3 is a schematic view of the exploded construction of the positioning cap and the N-pole contact of FIG. 2;

the high-voltage power supply comprises a 1 shell, a 2 middle partition plate, a 3L pole contact, a 4 second cavity, a 5 arc-extinguishing chamber, a 6 operating handle, a 7 contact support, a 71 second limiting part, an 8 leakage circuit board, a 9N pole contact, a 91 arc-extinguishing inclined plane, a 10 first cavity, an 11 positioning cover, a 111 first positioning groove, a 112 second positioning groove, a 12 shifting fork, a 121 shifting fork groove, a 122 first limiting part, a 13 torsion spring and a 14 positioning bulge.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein.

In the present application, the terms "upper", "lower", "inner", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "disposed," "configured," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

To solve the above-mentioned problems, as shown in fig. 1 to 2, an embodiment of the present application provides a circuit breaker, including: the casing 1, locate the middle baffle 2 in the casing 1, the middle baffle 2 is first cavity 10 and second cavity 4 with the inner chamber of casing 1 respectively, is provided with electric leakage circuit board 8 in the first cavity 10, is provided with explosion chamber 5 in the second cavity 4.

In the present embodiment, the arrangement positions of the leakage circuit board 8 and the arc extinguishing chamber 5 are adjusted for the purpose of reducing the length of the circuit breaker. Specifically, the circuit breaker is mainly composed of a housing 1 and a plurality of electrical components mounted in the housing 1. The middle partition board 2 is arranged in the shell 1, and the shell 1 is composed of two plastic pieces buckled on two sides of the middle partition board 2. The presence of the intermediate partition 2 thus divides the internal space of the housing 1 into two parts, one of which is a first cavity 10 located on the left side of the intermediate partition 2 and the other of which is a second cavity 4 located on the right side of the intermediate partition 2. The leakage circuit board 8 is then arranged in the first cavity 10 and the arc extinguishing chamber 5 is arranged in the second cavity 4, both on the left and right sides of the intermediate separator 2. Compared with the traditional circuit breaker, the leakage circuit board 8 does not occupy the length space of the shell 1 any more, and the installation of the leakage circuit board 8 is completed by reasonably utilizing the width space in the shell 1, so that the length of the whole circuit breaker is reduced. According to the actual use requirement, the dimensions of the arc extinguishing chamber 5 and the leakage circuit can be further reduced, so that the occupied space is smaller. The leakage circuit board 8 is a leakage detecting part in the circuit breaker, and the specific structure can be connected in a manner that the structure of the circuit breaker in the related art can be referred to, and the arc extinguishing chamber 5 can also be directly referred to the structure of the arc extinguishing chamber 5 in the circuit breaker in the related art.

The layout of the leakage circuit board 8 and the arc-extinguishing chamber 5 in the circuit breaker is adjusted, and the leakage circuit board 8 and the arc-extinguishing chamber 5 are respectively located in the first cavity 10 and the second cavity 4 at two sides of the shell 1, so that occupied space of the leakage circuit board 8 and the arc-extinguishing chamber 5 in the length direction of the shell 1 is reduced, the circuit breaker can be smaller in length, the circuit breaker is convenient to install in a distribution box with limited space, and the problem that the circuit breaker is longer in length due to the influence of distribution of the arc-extinguishing chamber 5 and the leakage protection circuit board in the related art and inconvenient to wire in distribution boxes with smaller spaces is solved.

The circuit breaker has the possibility of reducing the length due to the arrangement of the arc extinguishing chamber 5 and the leakage circuit board 8, and the reduced length of the circuit breaker can be determined according to the actual use requirement. For example, in some use environments, the length of the housing 1 may be set to be less than 90mm, and further, the length of the housing 1 may be set to be 85mm or less.

The existing integral type electric leakage circuit breaker mainly comprises an L pole part, an N pole part and an electric leakage detection part, wherein the L pole part comprises two L pole wiring terminals, and an L pole tripping device and an L pole arc extinguishing device which are connected between the L pole wiring terminals, and the L pole tripping device is in linkage fit with an operating handle 6. The N pole part comprises two N pole connecting terminals, the two N pole connecting terminals are directly connected through a wire, and the L pole part and the N pole part are connected with the electric leakage detection part. When the breaker is tripped and disconnected, the N pole is not cut off; however, in the actual use process, the N pole may have a charging condition, such as a user wiring error, or a zero-live wire connection in the line, so that the circuit is not completely cut off, so that the circuit breaker is broken, but the circuit is still charged, and potential safety hazard is brought.

For this purpose, as shown in fig. 2, an N-pole contact is disposed in the first cavity 10 in the present embodiment, an operating mechanism is disposed on the housing 1, and the operating mechanism includes an N-pole contact 9 disposed in the first cavity 4, and an operating handle 6 extending out of the housing 1, where the N-pole contact 9 can contact with or be disconnected from the N-pole contact along with the operation of the operating handle 6. Specifically, in this embodiment, an N-pole contact 9 capable of switching on and off an N-pole is added in an original circuit breaker, meanwhile, the N-pole contact 9 is also controlled by an operating handle 6 on the original circuit breaker, and the operating handle 6 can simultaneously control switching on and off of an L-pole in the circuit breaker, so that switching on and off of the L-pole and the N-pole in the circuit breaker can be simultaneously realized by controlling the action of the operating handle 6, and the use safety of the circuit breaker is improved.

For the L pole of the circuit breaker, an L pole contact is arranged in the second cavity 4 of the embodiment, the operating mechanism further comprises an L pole contact 3 positioned in the second cavity 4, and the L pole contact 3 can be contacted with the L pole contact or disconnected from the L pole contact along with the action of the operating handle 6.

In order to facilitate the installation of the N-pole contact 9 and the linkage with the operating handle 6, the operating mechanism in the embodiment further comprises a contact support 7, the contact support 7 is hinged on the shell 1 through a rotating shaft, and the operating handle 6 is connected with the contact support 7 and used for driving the contact support 7 to rotate around the rotating shaft;

the N-pole contact and the L-pole contact are respectively arranged on two sides of the contact support 7.

Specifically, in the present embodiment, the contact holder 7 is mounted inside the housing 1, and the operating handle 6 extends out of the housing 1. The operating handle 6 and the contact support 7 can be connected through a connecting rod, and specifically, the operating handle 6 and the connecting structure in the breaker in the related art can be adopted. The contact support 7 can be driven to rotate by pushing the operation handle 6 to rotate, so that the N-pole contact 9 and the L-pole contact 3 connected with the contact support 7 are driven to rotate to realize the connection and disconnection.

In order to facilitate the linkage of the contact support 7 and the N-pole contact 9, a shifting fork 12 is arranged at the part of the contact support 7 located in the first cavity 10 in the embodiment, and a shifting fork groove 121 is formed at the lower end of the shifting fork 12; the N-pole contact 9 is hinged to the middle partition 2, and the first end of the N-pole contact 9 extends into the shifting fork groove 121, and the second end extends to a position corresponding to the N-pole contact.

When the contact support 7 is driven to rotate, the shifting fork 12 can be driven to synchronously rotate, so that the shifting fork groove 121 pushes the first end of the N-pole contact 9 to rotate, and then the second end of the N-pole contact 9 is driven to rotate to realize the closing and opening of the N-pole contact. Since the switching-on and switching-off of the N-pole contact 9 is realized by the driving of the shift fork 12, further improvement is required to maintain a certain contact pressure of the N-pole contact 9 when contacting the N-pole contact:

specifically, as shown in fig. 3, in this embodiment, a cylindrical positioning protrusion 14 is mounted on a side surface of the contact support 7, and a fork 12 is sleeved on the positioning protrusion 14 and is rotatable about an axis of the positioning protrusion 14. The first limiting part 122 is arranged on one supporting leg of the shifting fork 12, the corresponding second limiting part 71 is arranged on the contact support 7, the torsional spring 13 is sleeved on the positioning protrusion 14, two supporting legs of the torsional spring 13 respectively abut against the first limiting part 122 and the second limiting part 71, and when the N-pole contact 9 is closed, a certain contact pressure can be applied to the N-pole contact under the action of the torsional spring 13, so that the stability of connection is ensured.

Because the arc still can be generated in the process of breaking the N pole, in order to process the generated arc, in this embodiment, an arc-driving inclined plane is provided at the second end of the N pole contact 9 at a side towards the N pole contact, and the inclined angle of the arc-driving inclined plane can send the arc to the arc extinguishing area in an inclined downward manner when contacting with the arc.

In order to facilitate the installation and the action of the N-pole contact 9, in this embodiment, an installation protrusion is provided on one side of the middle partition plate 2 located in the first cavity 10, and the middle part of the N-pole contact 9 is provided on the installation protrusion, where only a surface-to-surface contact relationship exists between the N-pole contact 9 and the installation protrusion; in order to enable the N-pole contact 9 to rotate around the axis of the mounting protrusion, the operating mechanism in this embodiment further includes a positioning cover 11, where the positioning cover 11 is fastened to the middle portion of the N-pole contact 9 and the mounting protrusion, and the positioning cover 11 is rotationally connected with the mounting protrusion. In this embodiment, the middle part of the N-pole contact 9 is pressed against the mounting protrusion by the positioning cover 11, and the connection between the positioning cover 11 and the mounting protrusion is also a rotational connection, so that both the positioning cover 11 and the N-pole contact 9 can be driven to rotate around the axis of the mounting protrusion.

The positioning cover 11 mainly aims at realizing the installation of the N-pole contact 9, and the first end and the second end of the N-pole contact 9 need to be connected with the shifting fork 12 and the N-pole contact respectively, so that two ends of the N-pole contact 9 extend out of the positioning cover 11. For this purpose, in this embodiment, a first positioning slot 111 and a second positioning slot 112 are respectively formed at the upper and lower ends of the positioning cover 11, a first end of the n-pole contact 9 passes through the first positioning slot 111, and a second end of the n-pole contact 9 passes through the second positioning slot 112.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, or the like, which are within the spirit and principles of the present application, are intended to be included within the scope of the present application.

Claims

1. A circuit breaker, comprising: the shell is arranged on the middle partition plate in the shell, the inner cavity of the shell is respectively provided with a first cavity and a second cavity, a leakage circuit board is arranged in the first cavity, and an arc extinguishing chamber is arranged in the second cavity.

2. The circuit breaker according to claim 1, characterized in that: the length of the shell is less than 90mm.

3. The circuit breaker according to claim 2, characterized in that: the length of the shell is less than or equal to 85mm.

4. The circuit breaker according to claim 1, characterized in that: the first cavity is internally provided with an N-pole contact, the shell is provided with an operating mechanism, the operating mechanism comprises an N-pole contact positioned in the first cavity and an operating handle extending out of the shell, and the N-pole contact can be contacted with the N-pole contact or disconnected with the N-pole contact along with the action of the operating handle.

5. The circuit breaker of claim 4, wherein: the second cavity is internally provided with an L-pole contact, the operating mechanism further comprises an L-pole contact positioned in the second cavity, and the L-pole contact can be contacted with the L-pole contact or disconnected from the L-pole contact along with the action of the operating handle.

6. The circuit breaker of claim 5, wherein: the operating mechanism further comprises a contact support, the contact support is hinged to the shell through a rotating shaft, and the operating handle is connected with the contact support and used for driving the contact support to rotate around the rotating shaft;

7. The circuit breaker of claim 6, wherein: a shifting fork is arranged at the part of the contact support, which is positioned in the first cavity, and a shifting fork groove is formed in the lower end of the shifting fork;

8. The circuit breaker of claim 7, wherein: and an arc-driving inclined plane is formed at one side of the second end of the N pole contact, which faces the N pole contact.

9. The circuit breaker according to any one of claims 4 to 8, characterized in that: a mounting protrusion is arranged on one side of the middle partition plate, which is positioned on the first cavity, and the middle part of the N-pole contact is arranged on the mounting protrusion;

10. The circuit breaker according to claim 9, characterized in that: the upper end and the lower end of the positioning cover are respectively provided with a first positioning groove and a second positioning groove, the first end of the N pole contact penetrates through the first positioning groove, and the second end of the N pole contact penetrates through the second positioning groove.