Circuit breaker with small closing force

Abstract

The utility model discloses a circuit breaker with small closing force. The problem that the closing force of an existing circuit breaker is too large is mainly solved. The device is characterized by further comprising a first rotating shaft (21) which is arranged on the support; the second rotating shaft (22) is arranged on the shell and used for being matched with the support in a hinged mode. The shaft hole (31) is formed in the middle of the moving contact and is used for being hinged with the first rotating shaft; the retaining wall (32) is arranged at the top of the moving contact and is opposite to the second rotating shaft; the mounting part (30) is arranged on the moving contact and is arranged above the shaft hole and below the retaining wall; one end of the elastic piece (4) is connected with the inner wall of the shell, and the other end of the elastic piece (4) is connected with the mounting part. According to the circuit breaker with small closing force, final pressure generation and mechanism opening speed are realized through the elastic piece, and the moving contact leans against the second rotating shaft, so that normal opening and closing of a product are realized, and the closing force of the product is reduced.

Description

Technical Field

[0001] The utility model relates to the field of miniature circuit breakers, and particularly relates to a circuit breaker with a small closing force. Background Art

[0002] At present, in the circuit breaker part of the existing reclosing C65 platform, there is a problem of large closing force, which causes the electric operating part unable to adopt a conventional motor and requires a customized motor. The volume of the motor is relatively large, occupying space, and the expansion functions of the product cannot be increased, restricting the development of the product. Content of the Utility Model

[0003] In order to overcome the deficiencies of the background art, the utility model provides a circuit breaker with a small closing force, mainly solving the problem of too large closing force of the existing circuit breaker.

[0004] The technical solution of the utility model is as follows.

[0005] A circuit breaker with a small closing force includes a housing. An operating mechanism and a tripping mechanism are arranged in the housing. The operating mechanism includes a bracket. A movable contact rotatably arranged is provided on the bracket, and further includes

[0006] A first rotating shaft, arranged on the bracket;

[0007] A second rotating shaft, arranged on the housing and used for hinged cooperation with the bracket;

[0008] A shaft hole, arranged in the middle of the movable contact and used for hinged connection with the first rotating shaft;

[0009] A stop wall, arranged at the top of the movable contact and opposite to the second rotating shaft;

[0010] An installation part, arranged on the movable contact and above the shaft hole and below the stop wall;

[0011] An elastic member, one end of which is connected to the inner wall of the housing and the other end is connected to the installation part.

[0012] The elastic member is a tension spring.

[0013] The installation part is an installation hole provided on the movable contact, and one end of the tension spring is connected to the installation hole.

[0014] An arc-shaped groove adapted to the outer circumferential wall of the second rotating shaft is provided on the stop wall.

[0015] The bracket includes an upper partition board and a lower partition board. An installation groove is formed between the upper partition board and the lower partition board, and the movable contact is installed in the installation groove.

[0016] The upper partition plate and the lower partition plate are connected by side plates, and through grooves are provided on the side plates and are arranged opposite to the retaining walls.

[0017] A buckle is provided on the bracket, and a linkage seat is further included. A sunk groove for connecting with a linkage rod is provided on the linkage seat. Part of the linkage seat is detachably connected to the buckle, and part of the linkage seat is detachably connected to the bracket.

[0018] A boss is provided on the bracket, and a clamping groove that is in clamping fit with the boss is provided on the linkage seat.

[0019] A slot is provided on the buckle, and a plug block that is matched with the slot is provided on the linkage seat.

[0020] The first rotating shaft is riveted on the bracket.

[0021] The beneficial effects of the present utility model are as follows: The present utility model provides a circuit breaker with a small closing force. The final pressure is generated and the opening speed of the mechanism are realized through elastic members. The moving contact leans against the second rotating shaft to realize the normal closing and opening of the product, and the closing force of the product is reduced. Description of the Drawings

[0022] Figure 1 It is an internal three-dimensional schematic diagram of an embodiment of the present utility model.

[0023] Figure 2 It is a partial three-dimensional schematic diagram of an embodiment of the present utility model.

[0024] Figure 3 It is a partial three-dimensional schematic diagram of an embodiment of the present utility model.

[0025] Figure 4 It is a partial exploded schematic diagram of an embodiment of the present utility model. Detailed Embodiments

[0026] The present utility model will be further described below in conjunction with the accompanying drawings: As shown in the figure, a circuit breaker with a small closing force includes a housing 1. An operating mechanism and a tripping mechanism are provided inside the housing. The operating mechanism includes a bracket 2. A movable contact 3 rotatably arranged is provided on the bracket. It also includes a first rotating shaft 21 provided on the bracket; a second rotating shaft 22 provided on the housing for hinged cooperation with the bracket; a shaft hole 31 provided in the middle of the movable contact for hinged connection with the first rotating shaft; a stop wall 32 provided at the top of the movable contact and arranged opposite to the second rotating shaft; an installation part 30 provided on the movable contact and located above the shaft hole and below the stop wall; an elastic member 4, one end of which is connected to the inner wall of the housing and the other end is connected to the installation part. The tripping mechanism and the operating mechanism are prior arts. Among them, the tripping mechanism can include an electromagnetic release and a bimetallic release, etc. The operating mechanism includes a bracket. A locking buckle and a tripping buckle are provided on the bracket. And a movable contact is provided on the bracket. A contact is provided on the movable contact and is located at the bottom of the movable contact, that is, below the shaft hole. The elastic member can be a tension spring. A pull rod can be provided inside the housing, and one end of the tension spring is connected to the pull rod. The other end of the tension spring hooks the installation part of the movable contact, which can be an installation hole, to give the movable contact a force to rotate towards the static contact. Conventional circuit breakers are driven by two torsion springs (or springs). One is provided on the bracket and the other is provided on the movable contact. In this way, the overall closing force is relatively large. With this structure, one tension spring can achieve the purpose, reducing the closing force.

[0027] In this embodiment, as shown in the figure, the elastic member is a tension spring.

[0028] In this embodiment, as shown in the figure, the installation part is an installation hole provided on the movable contact, and one end of the tension spring is connected to the installation hole. Of course, it can also be a connecting rod or other structures. The installation hole is more stable for installation.

[0029] In this embodiment, as shown in the figure, an arc-shaped groove 321 adapted to the outer circumferential wall of the second rotating shaft is provided on the stop wall. It is more adapted to the second rotating shaft and has a better use effect.

[0030] In this embodiment, as shown in the figure, the bracket includes an upper partition 201 and a lower partition 202. An installation groove 203 is formed between the upper partition and the lower partition. The movable contact is installed in the installation groove. The overall structure is more compact. The movable contact is enclosed, protecting the movable contact and making the installation of the movable contact more stable.

[0031] In this embodiment, as shown in the figure, the upper partition and the lower partition are connected by a side plate 204. A through groove 205 is provided on the side plate and is arranged opposite to the stop wall. It can be observed whether the contact is in place, which is more intuitive.

[0032] In this embodiment, as shown in the figure, a latch 24 is provided on the bracket, and a linkage seat 5 is further included. A sunk groove 51 for connecting with a linkage rod is provided on the linkage seat. Part of the linkage seat is detachably connected to the latch, and part of the linkage seat is detachably connected to the bracket. Whether to install the linkage seat can be selected according to the requirements of the product, and it is installed in the case of multiple P.

[0033] In this embodiment, as shown in the figure, a boss 25 is provided on the bracket, and a clamping groove 52 that is clamped and matched with the boss is provided on the linkage seat. The structure is simple and the installation is convenient.

[0034] In this embodiment, as shown in the figure, a slot 241 is provided on the latch, and a plug 53 that is matched with the slot is provided on the linkage seat. The structure is simple and the installation is convenient.

[0035] In this embodiment, as shown in the figure, the first rotating shaft is riveted on the bracket. The installation is firm and simple.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0038] The embodiments described with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation to the present invention. The embodiments should not be regarded as a limitation to the present invention, but any improvement based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A circuit breaker with a small closing force, comprising a housing (1), wherein an operating mechanism and a tripping mechanism are arranged in the housing, wherein the operating mechanism comprises a bracket (2), wherein a rotatable moving contact (3) is arranged on the bracket, and wherein: Also includes A first rotating shaft (21) is arranged on the bracket; A second rotating shaft (22), provided on the housing and used for hingedly cooperating with the bracket; An axis hole (31) is provided in the middle of the moving contact and is used for being hingedly connected to the first rotating shaft; A retaining wall (32) is arranged on the top of the moving contact and is arranged opposite to the second rotating shaft; A mounting portion (30) is disposed on the moving contact and is disposed above the shaft hole and below the retaining wall; An elastic member (4) has one end connected to the inner wall of the shell and the other end connected to the mounting portion.

2. A circuit breaker with low closing force according to claim 1, characterized in that: The elastic member is a tension spring.

3. A circuit breaker with low closing force according to claim 2, characterized in that: The mounting portion is a mounting hole provided on the moving contact, and one end of the tension spring is connected to the mounting hole.

4. A circuit breaker with low closing force according to claim 1, characterized in that: The retaining wall is provided with an arc-shaped groove (321) adapted to the circumferential outer wall of the second rotating shaft.

5. A circuit breaker with low closing force according to claim 1, characterized in that: The bracket comprises an upper partition plate (201) and a lower partition plate (202), a mounting groove (203) is formed between the upper partition plate and the lower partition plate, and the moving contact is mounted in the mounting groove.

6. A circuit breaker with low closing force according to claim 5, characterized in that: The upper partition plate and the lower partition plate are connected via a side plate (204), and a through slot (205) is provided on the side plate, the through slot being arranged opposite to the retaining wall.

7. A circuit breaker with low closing force according to claim 1, characterized in that: The bracket is provided with a lock buckle (24) and also includes a linkage seat (5), the linkage seat is provided with a sink (51) for connecting with a linkage rod, part of the linkage seat is detachably connected to the lock buckle, and part of the linkage seat is detachably connected to the bracket.

8. A circuit breaker with low closing force according to claim 7, characterized in that: The bracket is provided with a boss (25), and the linkage seat is provided with a slot (52) that is engaged with the boss.

9. A circuit breaker with low closing force according to claim 7, characterized in that: The lock buckle is provided with a slot (241), and the linkage seat is provided with an insert block (53) that matches the slot.

10. A circuit breaker with low closing force according to any one of claims 1 to 9, characterized in that: The first rotating shaft is riveted to the bracket.

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