CN219936973U

CN219936973U - Circuit breaker locking mechanism and miniature circuit breaker

Info

Publication number: CN219936973U
Application number: CN202321494766.0U
Authority: CN
Inventors: 李卫龙; 蒋彦忠; 王昭万
Original assignee: Anhui Wglean Electric Co ltd
Current assignee: Anhui Wglean Electric Co ltd
Priority date: 2023-06-13
Filing date: 2023-06-13
Publication date: 2023-10-31
Anticipated expiration: 2033-06-13

Abstract

The utility model provides a circuit breaker locking mechanism with simple structure and good reliability and a miniature circuit breaker. The technical scheme adopted comprises the following steps: the double-metal sheet of the circuit breaker drives the trigger rod to drive the lock catch to trip with the jump buckle, the middle part of the moving contact is connected onto the support in a shaft way, the jump buckle is connected onto the top of the moving contact in a shaft way and is connected with the lock catch in a shaft way, and the operating handle is connected with the jump buckle through the connecting rod.

Description

Circuit breaker locking mechanism and miniature circuit breaker

Technical Field

The utility model relates to a low-voltage electrical appliance, in particular to a miniature circuit breaker.

Background

The miniature circuit breaker (English name: miniature Circuit Breaker) is also called miniature circuit breaker (Micro Circuit Breaker), is suitable for overload and short-circuit protection of the line from the rated voltage of 230/400V to the rated current of 63A at the alternating current of 50/60Hz, and can also be used as the infrequent operation conversion of the line under normal conditions. The structure of the conventional miniature circuit breaker is as follows: the Chinese patent with the issued bulletin number of CN 215988635U and the name of miniature circuit breaker comprises: the tripping mechanism comprises a bracket, a trip button and a lock catch, wherein the trip button is connected with the bracket through a connecting rod, the handle is connected with the trip button, the lower end of the bracket is connected with a moving contact, and a traction rod connected with a bimetallic strip of the circuit breaker is arranged at the lower end of the lock catch. The disadvantages are: 1. the bimetallic strip drives the release between the lock catch and the jump buckle through the traction rod, and the defects of complex structure and poor reliability exist; 2. the support, the lock catch and the jump buckle are independent components, and the structure is complex, the assembly is troublesome, and the stability is poor.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a circuit breaker locking mechanism with simple structure and good reliability and a miniature circuit breaker.

In order to solve the problems, the technical scheme adopted by the utility model comprises the following steps: the lock catch, the jump buckle, the connecting rod, the operating handle and the moving contact are matched in a linkage way, and the lock catch is characterized in that: the utility model discloses a circuit breaker, including hasp, hasp one side integrated into one piece has the support, support upper end integrated into one piece has the trigger lever, and the bimetallic strip of circuit breaker drives the trigger lever drives the hasp is tripped with the jump knot, moving contact middle part hub connection in on the support, the jump knot hub connection in moving contact top, and with the hasp lock joint, the operation handle pass through the connecting rod with the jump knot is connected.

The circuit breaker locking mechanism is characterized in that: and the bracket is provided with a linkage hole.

The circuit breaker locking mechanism is characterized in that: the movable contact is in shaft connection with the bracket through a long shaft hole in the middle.

The circuit breaker locking mechanism is characterized in that: and a limiting hole is formed in the movable contact above the long shaft hole of the movable contact, and a conical groove is formed in the front end of the limiting hole.

A miniature circuit breaker comprising a housing, characterized in that: the circuit breaker locking mechanism is arranged in the shell, a bimetallic strip is arranged in the shell corresponding to the right side of the circuit breaker locking mechanism, the upper end of the bimetallic strip extends to the trigger rod of the support, a connecting spring is arranged in the shell corresponding to the left side of the circuit breaker locking mechanism, and one end of the connecting spring is connected with the conical groove of the moving contact.

The miniature circuit breaker is characterized in that: the bimetal strip is characterized in that an integrated wiring terminal is arranged in the shell corresponding to one side of the bimetal strip, the integrated wiring terminal comprises a wiring clamp and a wiring board integrally formed on one side of the wiring clamp, and the bimetal strip is welded with the wiring board through a flexible connection wire.

The miniature circuit breaker is characterized in that: the wiring board both ends are equipped with the location bellying, be equipped with in the casing with location bellying location complex constant head tank.

The miniature circuit breaker is characterized in that: the binding clip is externally clamped with a clamping spring.

The circuit breaker locking mechanism and the miniature circuit breaker have the advantages that: the support is integrally formed on one side of the lock catch, the trigger rod is integrally formed at the upper end of the support, the bimetallic strip of the circuit breaker drives the trigger rod to drive the lock catch to trip with the trip buckle, and the assembly of the traction rod, the support and the lock catch is omitted, so that the structure is simpler, and the reliability is good.

Drawings

The utility model is further described below with reference to the drawings.

Fig. 1 is a schematic structural view of a circuit breaker latch mechanism of the present utility model;

fig. 2 is an exploded view of the circuit breaker latch mechanism of the present utility model;

fig. 3 is a schematic structural view of the miniature circuit breaker of the present utility model;

fig. 4 is a schematic structural view of an integrated terminal according to the present utility model.

Detailed Description

Example 1

Referring to fig. 1 to 2, the circuit breaker latch mechanism of the present utility model includes a latch 1, a trip 2, a link 3, an operation handle 4, and a moving contact 5, which are coupled. The lock catch 1 is integrally formed with a support 6, a trigger rod 7 is integrally formed at the upper end of the support 6, and a bimetallic strip of the circuit breaker drives the trigger rod 7 to drive the lock catch 1 and the jump buckle 2 to trip. The middle part of the moving contact 5 is connected to the bracket 6 in a shaft way, and the jump buckle 2 is connected to the top of the moving contact 5 in a shaft way and is buckled with the lock catch 1. The operating handle 4 is connected with the jump button 2 through a connecting rod 3. When the locking mechanism is in a closed state, the trigger rod 7 of the bracket 6 is close to or contacts with the bimetallic strip of the circuit breaker; when in the tripped state, the trigger lever 7 of the bracket 6 is far away from the bimetal of the circuit breaker.

Preferably, the bracket 6 is provided with a linkage hole 8, and the linkage is realized by arranging a connecting rod in the linkage hole 8 and other protection switches.

Preferably, the moving contact 5 is in shaft connection with the bracket 6 through a long shaft hole 9 in the middle, and a certain displacement space is formed between the moving contact 5 and the connecting shaft so as to prevent clamping pieces.

Preferably, a limiting hole 10 is arranged above the moving contact 5 corresponding to the long shaft hole 9, a conical groove 11 is arranged at the front end of the limiting hole 10, and the moving contact can be connected with a connecting spring 12 in the circuit breaker more reliably through the conical groove 11.

Preferably, a protruding arc contact 22 is arranged at the top of the triggering rod 7, and a bimetallic strip of the circuit breaker acts on the arc contact 22 to trigger the triggering rod 7, so that the triggering is more sensitive.

Example 2

Referring to fig. 2 to 4, the miniature circuit breaker of the present utility model includes a housing 13, and a circuit breaker latch mechanism a of embodiment 1 is disposed in the housing 13. The inside of the shell 13 is provided with a bimetallic strip 14 corresponding to the right side of the circuit breaker locking mechanism a, the upper end of the bimetallic strip 14 extends to the trigger rod 7 of the bracket 6, the inside of the shell 13 is provided with a connecting spring 12 corresponding to the left side of the circuit breaker locking mechanism a, and one end of the connecting spring 12 is connected with the conical groove 11 of the movable contact 5. Specific: the lock catch 1 and the moving contact 5 of the circuit breaker lock catch mechanism a are axially connected in the shell 13 through a main shaft 23.

Preferably, an integrated wiring terminal 15 is disposed in the housing 13 corresponding to one side of the bimetal strip 14, the integrated wiring terminal 15 includes a jointing clamp 16 and a wiring board 17 integrally formed on one side of the jointing clamp 16, and the bimetal strip 14 is welded with the wiring board 17 through a flexible connection wire 18. Adopt the advantage of integral type binding post structure: 1. the wiring is convenient, and the wires are clamped by the jointing clamp 16; 2. has the advantages of convenient installation, stable structure, large current-carrying capacity, low temperature rise, etc.

Preferably, positioning protruding portions 19 are disposed at two ends of the wiring board 17, and positioning grooves 20 that are in positioning fit with the positioning protruding portions 19 are disposed in the housing 13, so as to improve stability of installation.

Preferably, the clamping spring 21 is clamped outside the jointing clamp 16, so as to improve the clamping force of the jointing clamp 16 and further improve the stability of the wiring.

Although the present utility model has been described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the utility model, and the utility model is not limited to the specific embodiments described above, but is intended to cover all modifications, equivalents and alternatives falling within the scope of the utility model.

Claims

1. The utility model provides a circuit breaker latch mechanism, includes linkage complex hasp (1), jump knot (2), connecting rod (3), action bars (4) and moving contact (5), its characterized in that: the utility model discloses a circuit breaker, including hasp (1), support (6) upper end integrated into one piece has trigger lever (7), the bimetallic strip of circuit breaker drives trigger lever (7) drive hasp (1) are tripped with jump knot (2), moving contact (5) middle part coupling in on support (6), jump knot (2) coupling in moving contact (5) top and with hasp (1) lock joint, handle (4) pass through connecting rod (3) with jump knot (2) are connected.

2. The circuit breaker latching mechanism of claim 1 wherein: and a linkage hole (8) is formed in the bracket (6).

3. The circuit breaker latching mechanism of claim 1 wherein: the movable contact (5) is in shaft connection with the bracket (6) through a long shaft hole (9) in the middle.

4. The circuit breaker latch mechanism of claim 3, wherein: and a limiting hole (10) is formed above the moving contact (5) corresponding to the long shaft hole (9), and a conical groove (11) is formed at the front end of the limiting hole (10).

5. The circuit breaker latching mechanism of claim 1 wherein: the top of the trigger rod (7) is provided with a raised arc contact (22).

6. A miniature circuit breaker comprising a housing (13), characterized in that: the circuit breaker locking mechanism (a) of any one of claims 1-5 is arranged in the shell (13), a bimetallic strip (14) is arranged in the shell (13) corresponding to the right side of the circuit breaker locking mechanism (a), the upper end of the bimetallic strip (14) extends to the trigger rod (7) of the support (6), a connecting spring (12) is arranged in the shell (13) corresponding to the left side of the circuit breaker locking mechanism (a), and one end of the connecting spring (12) is connected with the conical groove (11) of the moving contact (5).

7. The miniature circuit breaker of claim 6, wherein: the bimetallic strip is characterized in that an integrated wiring terminal (15) is arranged in the shell (13) corresponding to one side of the bimetallic strip (14), the integrated wiring terminal (15) comprises a wiring clamp (16) and a wiring board (17) integrally formed on one side of the wiring clamp (16), and the bimetallic strip (14) is welded with the wiring board (17) through a flexible connection wire (18).

8. The miniature circuit breaker of claim 7, wherein: positioning protruding portions (19) are arranged at two ends of the wiring board (17), and positioning grooves (20) matched with the positioning protruding portions (19) in a positioning mode are formed in the shell (13).

9. The miniature circuit breaker of claim 7, wherein: a clamping spring (21) is clamped outside the jointing clamp (16).