CN212874399U - Quick breaking structure of miniature circuit breaker - Google Patents

Abstract

The utility model discloses a miniature circuit breaker's quick disconnected structure of dividing, the spacing post fluting of second of seting up on the first spacing post fluting and the spacing post of second of seting up on couple spring, the first spacing post, the couple spring includes the spring body, fixes the first couple in spring body one end and fixes the second couple at the spring body other end. The miniature circuit breaker is in two spacing post flutings of packing into respectively with couple spring both ends in assembling process, makes the product have a little spring tension at the open position, lets inside the couple spring can not fall into the product, and the spring has a big spring tension after closing a floodgate, and the spring tension is not enough to break off the floodgate with the product after closing a floodgate, gives a pulling force when the product sound contact takes place to bounce the condition, lets the product divide the section fast. The breaking structure of the miniature circuit breaker is simple, the problems that the service life of a product is shortened and the burning condition of the moving contact and the static contact is reduced due to the fact that the moving contact and the static contact of the product bounce but cannot be disconnected can be solved, and the service life and the use safety of the product are improved.

Description

Quick breaking structure of miniature circuit breaker

Technical Field

The utility model relates to a miniature circuit breaker technical field especially relates to a miniature circuit breaker's quick disconnected structure of dividing.

Background

The miniature circuit breaker is also called as a miniature circuit breaker, is an important electrical component in low-voltage distribution industry and civil equipment, and is mainly used for industry and commerce. Various places such as high-rise and civil houses. At present, the main C65 structure of domestic miniature circuit breakers is the main structure, and the improvement of product breaking capacity and service life are the main subjects of research of domestic companies.

SUMMERY OF THE UTILITY MODEL

The utility model is not enough to prior art, the utility model provides a miniature circuit breaker's quick breaking structure possesses the advantage that reduces the product and divides the in-process sound contact spring of breaking, has solved the function of current miniature circuit breaker sound contact spring in the use, and miniature circuit breaker sound contact spring can produce electric arc, sends a large amount of heats, and sound contact will burn out under the temperature that electric arc produced.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

the utility model provides a miniature circuit breaker's quick breaking structure, miniature circuit breaker includes two golden subassemblies, shell and coil pack, two golden subassemblies include moving contact and contact support, the coil pack includes silver point, and its characteristics lie in, add a first spacing post in the contact support, add a spacing post of second on the wall of shell.

The quick breaking structure comprises a hook spring, a first limiting column groove formed in a first limiting column and a second limiting column groove formed in a second limiting column, wherein the hook spring comprises a spring body, a first hook fixed at one end of the spring body and a second hook fixed at the other end of the spring body; during miniature circuit breaker during the assembly, pack into first spacing post fluting with first couple in, the second couple is packed into in the spacing post fluting of second.

Preferably, a first limiting column is additionally arranged at the lower end of the contact support.

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in:

the breaking structure of the miniature circuit breaker is simple, the problems that the service life of a product is shortened and the burning condition of the moving contact and the static contact is reduced due to the fact that the moving contact and the static contact of the product bounce but cannot be disconnected can be solved, and the service life and the use safety of the product are improved.

Drawings

Fig. 1 is a schematic diagram of the internal structure of a miniature circuit breaker;

FIG. 2 is a schematic structural diagram of a dual gold component;

FIG. 3 is a schematic diagram of a coil assembly;

FIG. 4 is a schematic view of a two-end hook spring structure;

FIG. 5 is a schematic view of a contact support structure;

FIG. 6 is a schematic view of the housing;

FIG. 7 is a schematic view of an assembly structure of a hook spring and a bimetal assembly;

fig. 8 is a schematic structural diagram of the closing position of the hook spring, the bimetal assembly and the shell after assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the miniature circuit breaker is composed of a bimetal assembly 1, a housing 2, a hook spring 3, a coil assembly 4, an arc extinguish chamber 5, a handle 6, a handle spring 7, a U-shaped lever 8, a U-shaped pull rod 9, an adjusting screw 10 and a jump buckle 11.

As shown in fig. 2, the bimetal assembly 1 is composed of an arc tab 101, a bimetal 102, a flexible coupling 103, a bimetal contact plate 104, a connecting plate 105, a movable contact 106, a contact support 107, a main lever 108, a main force spring 109, a torsion spring 110, a limiting member 111, a lock catch 112 and a shaft 113.

As shown in fig. 3, the coil assembly 4 is composed of an iron core ejector rod 401, an iron core spring 402, a movable iron core 403, a coil contact plate 404, a silver point 405, a fixed contact 406, a magnetic yoke 407, and a fixed iron core 408.

As shown in fig. 4, the hook spring 3 includes a spring body, a first hook 301 fixed to one end of the spring body, and a second hook 302 fixed to the other end of the spring body.

As shown in fig. 5, a first limiting post is additionally disposed on the contact support 107, and a first limiting post slot 107-1 is disposed on the first limiting post.

As shown in fig. 6, a second limiting column is additionally disposed on the wall of the housing 2, and a second limiting column slot 201 is formed on the second limiting column.

As shown in fig. 7, during the assembly process, a first hook 301 at one end of the hook spring 3 is installed in the position-limiting column slot 107-1 of the contact support 107 in the bimetal assembly 1, then a second hook 302 at the other end of the hook spring 3 is installed in the position-limiting column slot 201 on the wall of the housing 2, and the opening position of the miniature circuit breaker is shown in fig. 1 after the assembly with the hook spring 3 is completed. After the product is assembled, the hook spring 3 is pulled at the two ends of the bimetal component 1 and the shell 2, and the hook spring 3 cannot fall into the product without stress to cause other damages; after the product is switched on (the silver point 405 in the coil component 4 and the moving contact 106 in the bimetal component 1) (fig. 8), the bimetal component 1 is pulled by the hook spring 3, and because the shell 2 cannot move, the shell 2 and the hook spring 3 can provide a pulling force for the bimetal component 1.

1. When a large current fault occurs In a product and the large current fault cannot meet the action of the product (the GB/T10963.1 standard requires short-circuit protection C-type action current (5 In-10 In)), the moving contact 106 In the bimetal component 1 of the product bounces with the silver point 405 In the coil component 4, and the product bounces for many times, so that the moving contact 107 In the bimetal component 1 and the silver point 405 In the coil component 4 are abraded, the temperature rise of the product is increased, and the service life of the product is shortened.

2. The proper hook spring 3 is designed, when a product has a large-current fault and the large-current fault cannot meet the action of the product (the GB/T10963.1 standard requires short-circuit protection C-type action current (5 In-10 In)), the moving contact 106 In the bimetal component 1 of the product bounces with the silver point 405 In the coil component 4, the tensile force of the hook spring 3 and the shell 2 can make the bounced opening of the product unable to be closed, and the service life of the product is prolonged.

3. The proper hook spring 3 is designed, the product action (short-circuit protection C-type action current (5 In-10 In) required by GB/T10963.1 standard) is met when the product is In failure, the shell 2 and the hook spring 3 can provide a pulling force at the moment of the action of the product, the product breaking speed is accelerated, the arc discharge time during the product breaking is reduced, the product breaking capacity is improved, and the service life of the product is prolonged.

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims (2)

1. A quick breaking structure of a miniature circuit breaker comprises a bimetallic assembly, a shell and a coil assembly, wherein the bimetallic assembly comprises a moving contact and a contact support, and the coil assembly comprises a silver point;

the quick breaking structure comprises a hook spring, a first limiting column groove formed in a first limiting column and a second limiting column groove formed in a second limiting column, wherein the hook spring comprises a spring body, a first hook fixed at one end of the spring body and a second hook fixed at the other end of the spring body; when the miniature circuit breaker is assembled, the first hook is arranged in the first limiting column groove, and the second hook is arranged in the second limiting column groove.

2. A rapid breaking structure of a miniature circuit breaker as claimed in claim 1, wherein a first position-limiting post is added at a lower end position of said contact support.

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