CN219017558U

CN219017558U - Small-sized circuit breaker

Info

Publication number: CN219017558U
Application number: CN202223612839.XU
Authority: CN
Inventors: 蓝汉兴; 叶选锋
Original assignee: Zhejiang Qicheng Electrical Equipment Co Ltd
Current assignee: Zhejiang Qicheng Electrical Equipment Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-12
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a miniature circuit breaker, which comprises a shell, a plurality of operating mechanisms and a plurality of contact mechanisms, wherein the operating mechanisms and the contact mechanisms are arranged in the shell, each contact mechanism comprises a moving contact and a fixed contact, the moving contact and the fixed contact are respectively provided with a moving contact and a fixed contact, the operating mechanisms are used for driving the moving contact to be in contact with or separated from the fixed contact, the fixed contact comprises a fixed contact plate and two elastic sheets which are integrally connected, the fixed contact plate is provided with a plurality of fixed contacts which are distributed at intervals, and the two elastic sheets are oppositely formed into slots for inserting external conductive pieces. When in wiring, only the external conductive piece is required to be inserted into the slot between the two elastic sheets, so that one external conductive piece can be electrically connected with a plurality of static contacts.

Description

Small-sized circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a miniature circuit breaker.

Background

The miniature circuit breaker is a protective electric appliance installed on a terminal distribution line and is mainly used for overload and short-circuit protection of the line and electric equipment.

The existing 2P circuit breaker comprises two wire inlet terminals and two wire outlet terminals, when the two wire inlet terminals are required to be connected with the same power supply, a wire is connected with one wire inlet terminal from the power supply to be assembled, and then the other wire is led out from the wire inlet terminal to be assembled with the other wire inlet terminal, so that the wire connection is complex for a user, and the use is inconvenient.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defects of complicated wiring and inconvenient use of users of the 2P circuit breaker in the prior art, thereby providing a small circuit breaker with quick and convenient wiring.

The utility model provides a miniature circuit breaker, which comprises a shell, a plurality of operating mechanisms and a plurality of contact mechanisms, wherein the operating mechanisms and the contact mechanisms are arranged in the shell, the contact mechanisms comprise a moving contact and a fixed contact, the moving contact and the fixed contact are respectively provided with a moving contact and a fixed contact, the operating mechanisms are used for driving the moving contact to be in contact with or separated from the fixed contact, the fixed contact comprises a fixed contact plate and two elastic pieces which are integrally connected, the fixed contact plate is provided with a plurality of fixed contacts which are distributed at intervals, and the two elastic pieces are oppositely formed into slots for inserting external conductive pieces.

The fixed contact plate is provided with a first groove positioned between two adjacent fixed contacts.

The two elastic sheets are respectively arranged on two sides of the length direction of the fixed contact plate and are connected with the fixed contact in a bending way.

The elastic sheet comprises a first section connected with the fixed contact plate and a second section contacted with the external conductive piece, and the contact mechanism further comprises elastic pieces which are suitable for enabling the two second sections to be in pressing contact with the external conductive piece.

The elastic piece comprises a connecting part and two pressing plate parts which are respectively arranged at two ends of the connecting part in the length direction, wherein the two pressing plate parts respectively correspond to and prop against the outer side faces of the two second sections.

The second section is provided with a first lug extending towards the direction of the connecting part, and the inner side surface of the pressing plate part is provided with a second lug which is attached and abutted with the first lug.

The shell comprises a baffle plate positioned in the middle, a first cover plate and a second cover plate which are respectively arranged at two sides of the baffle plate, wherein the baffle plate and the first cover plate are enclosed to form a first installation cavity suitable for installing one operating mechanism, the baffle plate and the second cover plate are enclosed to form a second installation cavity suitable for installing the other operating mechanism, and the baffle plate is provided with a second groove or opening which is communicated with the first installation cavity and the second installation cavity and is suitable for installing the static contact and the elastic piece.

And a stop block propped against the connecting part of the elastic piece is formed on the partition plate.

The technical scheme of the utility model has the following advantages:

1. the small-sized circuit breaker provided by the utility model has the advantages that the static contact comprises the static contact plate and the two elastic sheets which are integrally connected, the static contact plate is provided with the plurality of static contacts which are distributed at intervals, and when in wiring, the external conductive piece is only required to be inserted into the slot between the two elastic sheets, so that one external conductive piece can be electrically connected with the plurality of static contacts.

2. The small circuit breaker provided by the utility model has the advantages that the fixed contact plate is provided with the first groove between the two adjacent fixed contacts, so that the electric arc generated when the movable contact and the fixed contact are disconnected can be discharged from the first groove, the ablation of the electric arc to the movable contact and the fixed contact is reduced, and the service life is prolonged.

3. According to the miniature circuit breaker provided by the utility model, the second section is provided with the first protruding block extending towards the direction of the connecting part, the inner side surface of the pressing plate part is provided with the second protruding block which is attached and abutted against the first protruding block, and the contact area between the pressing plate part and the second section can be increased by the first protruding block and the second protruding block, so that the second section is more firmly pressed and connected with an external conductive piece.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an explosion structure of a miniature circuit breaker of the present utility model;

fig. 2 is a schematic structural view of the miniature circuit breaker with the second cover plate removed;

FIG. 3 is a schematic view of an exploded construction of the stationary contact and the spring;

fig. 4 is a perspective view of a stationary contact.

Reference numerals illustrate: 1. a housing; 2. an operating mechanism; 3. a moving contact; 4. a stationary contact; 5. a movable contact; 6. a stationary contact; 7. a stationary contact plate; 8. a spring plate; 9. a slot; 10. a first groove; 11. a first section; 12. a second section; 13. an elastic member; 14. a connection part; 15. a pressing plate portion; 16. a first bump; 17. a second bump; 18. a partition plate; 19. a first cover plate; 20. a second cover plate; 21. a second groove; 22. and a stop block.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Examples

The embodiment provides a miniature circuit breaker, which comprises a shell 1, a plurality of operating mechanisms 2 and a plurality of contact mechanisms, wherein the operating mechanisms 2 and the contact mechanisms are arranged inside the shell 1.

As shown in fig. 2, the contact mechanism comprises a moving contact 3 and a fixed contact 4, wherein the moving contact 3 and the fixed contact 4 are respectively provided with a moving contact 5 and a fixed contact 6, and the fixed contact 4 comprises a fixed contact plate 7 and two elastic sheets 8 which are integrally connected.

As shown in fig. 3 and 4, the fixed contact plate 7 is provided with a plurality of fixed contacts 6 which are distributed at intervals, and a first groove 10 which is positioned between two adjacent fixed contacts 4. The two elastic pieces 8 are respectively arranged at two sides of the length direction of the fixed contact plate 7 and are connected with the fixed contact 4 in a bending way, the two elastic pieces 8 are oppositely formed into a slot 9 for an external conductive piece to be inserted, and the elastic pieces 8 comprise a first section 11 connected with the fixed contact plate 7 and a second section 12 contacted with the external conductive piece.

The contact mechanism further comprises a resilient member 13 adapted to bring the two second sections 12 into pressing contact with the outer conductive member. As shown in fig. 3, the elastic member 13 includes a connecting portion 14, and two pressing plate portions 15 disposed at two ends of the connecting portion 14 in a longitudinal direction, the two pressing plate portions 15 respectively contact with outer sides of the two second segments 12, the second segments 12 have first protrusions 16 extending toward the connecting portion 14, and second protrusions 17 contacting with the first protrusions 16 are disposed on inner sides of the pressing plate portions 15.

The operating mechanism 2 is used for driving the moving contact 3 to be in contact with the fixed contact 4 or be separated from the moving contact, and it should be noted that the operating mechanism 2 is in the prior art, so the specific structure and the working principle thereof will not be described in detail.

The casing 1, as shown in fig. 1, includes a partition 18 located in the middle, and a first cover plate 19 and a second cover plate 20 separately located at two sides of the partition 18, where the partition 18 and the first cover plate 19 enclose to form a first installation cavity suitable for installing one of the operating mechanisms 2, the partition 18 and the second cover plate 20 enclose to form a second installation cavity suitable for installing the other operating mechanism 2, as shown in fig. 2, and a second groove 21 or an opening hole communicating the first installation cavity and the second installation cavity and suitable for installing the static contact 4 and the elastic member 13 is formed on the partition 18. The baffle 18 is formed with a stopper 22 that abuts against the connecting portion 14 of the elastic member 13.

The small circuit breaker provided by the utility model has the advantages that the fixed contact 4 comprises the fixed contact plate 7 and the two elastic sheets 8 which are integrally connected, the fixed contact plate 7 is provided with the plurality of fixed contacts 6 which are distributed at intervals, and when in wiring, the external conductive piece is only required to be inserted into the slot 9 between the two elastic sheets 8, so that one external conductive piece can be electrically connected with the plurality of fixed contacts.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The utility model provides a miniature circuit breaker, includes casing (1), and locates a plurality of operating device (2) and a plurality of contact mechanism inside casing (1), contact mechanism includes moving contact (3) and stationary contact (4), moving contact (3) with be equipped with moving contact (5) and stationary contact (6) on stationary contact (4) respectively, operating device (2) are used for the drive moving contact (3) with stationary contact (4) contact intercommunication or separation disconnection, a serial communication port, stationary contact (4) include a plurality of stationary contact board (7) and two shell fragment (8) that link to each other an organic whole, a plurality of stationary contact (6) that have the interval distribution on stationary contact board (7), two shell fragment (8) form relatively and supply external conductor male slot (9).

2. Miniature circuit breaker according to claim 1, characterized in that the stationary contact plate (7) has a first recess (10) between two adjacent stationary contacts (4).

3. Miniature circuit breaker according to claim 1 or 2, characterized in that two spring plates (8) are arranged on both sides of the length direction of the stationary contact plate (7) and are connected with the stationary contact (4) in a bending manner.

4. A miniature circuit breaker according to claim 1, characterized in that said spring plate (8) comprises a first section (11) connected to said stationary contact plate (7) and a second section (12) in contact with said external conductive element, said contact mechanism further comprising an elastic element (13) adapted to bring both said second sections (12) into pressing contact with said external conductive element.

5. The miniature circuit breaker according to claim 4, characterized in that the elastic member (13) comprises a connecting portion (14), and two pressing plate portions (15) respectively provided at both ends of the connecting portion (14) in the longitudinal direction, the two pressing plate portions (15) respectively corresponding to the outer side faces of the two second sections (12).

6. The miniature circuit breaker according to claim 5, characterized in that the second section (12) has a first projection (16) extending in the direction of the connection portion (14), the inner side of the pressure plate portion (15) being provided with a second projection (17) that abuts against the first projection (16).

7. The miniature circuit breaker according to claim 5, characterized in that the housing (1) comprises a partition plate (18) located in the middle, and a first cover plate (19) and a second cover plate (20) respectively arranged at two sides of the partition plate (18), wherein the partition plate (18) and the first cover plate (19) enclose a first mounting cavity suitable for mounting one operating mechanism (2), the partition plate (18) and the second cover plate (20) enclose a second mounting cavity suitable for mounting the other operating mechanism (2), and a second groove (21) or an opening hole which is communicated with the first mounting cavity and the second mounting cavity and suitable for mounting the static contact (4) and the elastic piece (13) is formed on the partition plate (18).

8. Miniature circuit breaker according to claim 7, characterized in that said partition (18) is formed with a stop (22) against said connection (14) of said elastic element (13).