1P + N miniature circuit breaker

Abstract

The utility model relates to a 1P + N miniature circuit breaker, which comprises a base, a middle cover, an upper cover and an operating mechanism, the lower ends of two moving contacts are respectively arranged on the two sides of the middle cover, moving contact springs for pressing the moving contacts forwards are arranged between the moving contacts and a contact support, a separating part is formed below the contact support along the edge of an opening of the middle cover, and the separating part is arranged on the upper cover. One side of the separating part extends outwards to form a staggered separating plate which is staggered with the middle cover, a wide releasing surface is formed in front of the lower end of the lock catch, a middle cover groove is formed in the lower side edge of the releasing surface, and the upper side edge of the middle cover is sleeved with the middle cover groove. According to the operating mechanism provided by the utility model, the staggered partition plates of the contact supports and the middle cover grooves of the lock catches are matched with the middle cover to realize the staggered insulation structure, so that the moving contacts on the two sides of the operating mechanism are isolated, and the insulation performance of the N pole and the P pole is ensured.

Description

Technical Field

[0001] The utility model relates to a small circuit breaker, in particular to a 1P+N small circuit breaker. Background Art

[0002] 1P+N miniature circuit breakers are miniature circuit breakers that use one operating mechanism to control the opening and closing of both N and P poles. Existing 1P+N miniature circuit breakers use a middle cover to separate the base and the upper cover to isolate the N pole and the P pole, but they use one operating mechanism for synchronous action, so the operating mechanism needs to cross the N pole and the P pole, which leads to certain insulation risks at the operating mechanism, so it is necessary to strengthen the insulation performance between the operating mechanism and the middle cover.

[0003] At the same time, the operating mechanism usually adopts a connecting rod connection between the jump buckle and the handle, and realizes quick release through the snap connection between the jump buckle and the lock buckle. There is a certain force in the connection between the jump buckle and the lock buckle, which makes the jump buckle easily pop out of the lock buckle, resulting in inconvenient assembly, especially since a connecting rod needs to be inserted into the jump buckle. Therefore, an operating mechanism with simple structure and easy assembly is needed. Summary of the invention

[0004] In view of the above-mentioned deficiencies, the utility model provides a 1P+N miniature circuit breaker with good N-pole and P-pole insulation performance, simple structure and convenient assembly.

[0005] In order to achieve the above purpose, the utility model adopts a 1P+N small circuit breaker, including a base, a middle cover, an upper cover and an operating mechanism, the operating mechanism and the middle cover are arranged between the upper cover and the base, an opening is formed above the middle cover, the operating mechanism is arranged in the opening, the operating mechanism includes a handle, a connecting rod, a lock, a contact bracket, and a moving contact, the lock is hinged on the contact bracket, a lock position is formed between the upper end of the contact bracket and the lock, one end of the connecting rod is inserted in the lock position, the other end of the connecting rod is connected to the handle, and the moving contact is connected to the lower end of the contact bracket. Its characteristics The invention discloses a method for providing a movable contactor having two movable contacts, which are respectively hinged on both sides of the lower end of the contact bracket, and the lower ends of the two movable contacts are respectively arranged on both sides of the middle cover, and a movable contact spring for pressing the movable contact forward is arranged between the movable contact and the contact bracket, and a partition is formed along the edge of the middle cover opening below the contact bracket, and one side of the partition extends outward to form an interlaced partition plate interlaced with the middle cover, and a wide release surface is formed in front of the lower end of the lock, and a middle cover groove is formed on the lower side of the release surface, and the middle cover groove is sleeved on the upper side of the middle cover.

[0006] The utility model is further configured such that the upper side of the lock position and the side close to the handle are composed of a lock edge on the lock, and the side of the lock position away from the handle is composed of a bracket edge on the contact bracket, and a jump-lock opening that can be opened or closed is formed between the lock edge and the bracket edge above the side away from the handle, a lock spring for closing the jump-lock opening is arranged between the contact bracket and the lock, and a bracket spring for moving the upper end of the contact bracket toward the handle is connected to the contact bracket.

[0007] The utility model is further configured that the lower end of the lock is connected to a bimetallic pull rod at one side of the base, a bimetallic sheet is arranged between the base and the middle cover, and the rear end of the bimetallic pull rod is hooked on the outer side of the bimetallic sheet.

[0008] The utility model is further configured that an indication surface is formed on the upper end of the lock buckle.

[0009] The utility model is further configured that an arc-shaped stopper is formed at the upper end of the moving contact, and the rear side of the stopper abuts against the contact bracket.

[0010] The beneficial effect of the utility model is that the staggered partitions of the contact bracket and the middle cover groove of the lock buckle cooperate with the middle cover to realize the staggered insulation structure to achieve isolation between the moving contacts on both sides of the operating mechanism, ensuring the insulation performance of the N pole and the P pole. The operating mechanism uses the lock buckle position to limit the connecting rod of the connecting handle, eliminating the jump buckle, simplifying the assembly, and reducing the production cost; using a contact bracket to connect the two moving contacts to achieve the synchronous action of the two moving contacts, with a simple structure and high reliability; using a wide release surface to increase the connection surface with the release, it is convenient for the release to push the lock buckle to achieve the release action. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an exploded view of a specific embodiment of the utility model.

[0012] Figure 2 It is a front view of a specific embodiment of the utility model without the base and the upper cover.

[0013] Figure 3 yes Figure 2 AA section view.

[0014] Figure 4 It is a rear view of a specific embodiment of the utility model without the base and the upper cover.

[0015] Figure 5 yes Figure 4 Top view of the . DETAILED DESCRIPTION

[0016] like Figure 1 to Figure 5As shown, a specific embodiment of the utility model is a 1P+N miniature circuit breaker, comprising a base 1, a middle cover 2, an upper cover 3 and an operating mechanism 4, wherein the operating mechanism 4 and the middle cover 2 are arranged between the upper cover 3 and the base 1, an opening is formed above the middle cover 2, and the operating mechanism 4 is arranged in the opening, and the operating mechanism 4 comprises a handle 41, a connecting rod 42, a lock 43, a contact bracket 44, and a moving contact 45, wherein the lock 43 is hinged on the contact bracket 44, and a lock position 40 is formed between the upper end of the contact bracket 44 and the lock 43, one end of the connecting rod 42 is inserted into the lock position 40, and the other end of the connecting rod 42 is connected to the handle 41, and there are two moving contacts 45, and the two moving contacts 45 are respectively hinged at the lower end of the contact bracket 44. On both sides of the end, the lower ends of the two moving contacts 45 are respectively arranged on both sides of the middle cover 2, and a moving contact spring 46 is arranged between the moving contact 45 and the contact bracket 44 to press the moving contact 45 forward. An arc-shaped stopper 451 is formed on the upper end of the moving contact 45, and the rear side of the stopper 451 is against the contact bracket 44. A partition 441 is formed along the edge of the opening of the middle cover 2 below the contact bracket 44, and one side of the partition 441 extends outward to form a staggered partition 442 that is staggered with the middle cover 2. A wide release surface 431 is formed in front of the lower end of the lock buckle 43, and a middle cover groove 432 is formed on the lower side of the release surface 431, and the middle cover groove 432 is sleeved on the upper side of the opening of the middle cover 2.

[0017] The upper side of the lock position 40 and the side close to the handle 41 are formed by the lock edge 433 on the lock 43, and the side of the lock position 46 away from the handle 41 is formed by the bracket edge 443 on the contact bracket 44. A jump-button opening 401 that can be opened or closed is formed between the lock edge 433 and the bracket edge 443 above the side away from the handle 41. A lock spring 47 for closing the jump-button opening 401 is arranged between the contact bracket 44 and the lock 43, and a bracket spring 48 for moving the upper end of the contact bracket 44 toward the handle 41 is connected to the contact bracket 44. An indicating surface 434 is formed at the upper end of the lock 43, and a bimetallic pull rod 49 is connected to the lower end of the lock 43 on one side of the base. A bimetallic strip 5 is arranged between the base 1 and the middle cover 2, and the rear end of the bimetallic pull rod 49 is hooked on the outer side of the bimetallic strip 5.

[0018] In the above specific embodiment, the side direction where the handle is located is positioned as the front, and the rear is the opposite direction.

[0019] The preferred embodiments of the present invention in the above specific embodiments and other obvious changes are also within the protection scope of the claims.

Claims

1. A 1P+N miniature circuit breaker, comprising a base, a middle cover, an upper cover and an operating mechanism, wherein the operating mechanism and the middle cover are arranged between the upper cover and the base, an opening is formed above the middle cover, the operating mechanism is arranged in the opening, the operating mechanism comprises a handle, a connecting rod, a lock, a contact bracket, and a moving contact, the lock is hinged on the contact bracket, a lock position is formed between the upper end of the contact bracket and the lock, one end of the connecting rod is inserted into the lock position, the other end of the connecting rod is connected to the handle, and the moving contact is connected to the lower end of the contact bracket, characterized in that: There are two moving contacts, which are hinged on both sides of the lower end of the contact bracket, and the lower ends of the two moving contacts are respectively arranged on both sides of the middle cover. A moving contact spring is arranged between the moving contact and the contact bracket to press the moving contact forward. A partition is formed below the contact bracket along the edge of the middle cover opening, and one side of the partition extends outward to form an staggered partition plate that is staggered with the middle cover. A wide release surface is formed in front of the lower end of the lock, and a middle cover groove is formed on the lower side of the release surface, and the middle cover groove is sleeved on the upper side of the middle cover.

2. The 1P+N miniature circuit breaker according to claim 1, characterized in that: The upper side of the lock position and the side close to the handle are composed of a lock edge on the lock, and the side of the lock position away from the handle is composed of a bracket edge on the contact bracket, and a jump-lock opening that can be opened or closed is formed between the lock edge and the bracket edge above the side away from the handle, and a lock spring for closing the jump-lock opening is arranged between the contact bracket and the lock, and a bracket spring for moving the upper end of the contact bracket toward the handle is connected to the contact bracket.

3. The 1P+N miniature circuit breaker according to claim 1 or 2, characterized in that: The lower end of the lock buckle is connected with a bimetallic pull rod on one side of the base, a bimetallic sheet is arranged between the base and the middle cover, and the rear end of the bimetallic pull rod is hooked on the outer side of the bimetallic sheet.

4. The 1P+N miniature circuit breaker according to claim 1 or 2, characterized in that: The upper end of the lock buckle forms an indication surface.

5. The 1P+N miniature circuit breaker according to claim 1 or 2, characterized in that: An arc-shaped stopper is formed at the upper end of the moving contact, and the rear side of the stopper abuts against the contact support.

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