CN217239367U

CN217239367U - Novel circuit breaker

Info

Publication number: CN217239367U
Application number: CN202220444125.3U
Authority: CN
Inventors: 陈高; 钱婷婷; 邵锦彬
Original assignee: SASSIN INTERNATIONAL ELECTRIC SHANGHAI CO Ltd
Current assignee: SASSIN INTERNATIONAL ELECTRIC SHANGHAI CO Ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-08-19
Anticipated expiration: 2032-03-02

Abstract

The utility model provides a pair of novel circuit breaker, include: a housing; the operating mechanism is provided with a handle at one end exposed out of the shell; the other end of the operating mechanism arranged in the shell is a vertically arranged turntable; a limiting spring is hinged on the rotary table; one end of the push rod is pivoted to the bottom of the turntable, and the end part of the limiting spring is abutted to the upper part of the push rod; the other end of the push rod is a pushing part; the limiting spring is used for limiting the upward displacement of the pushing part when the push rod is driven by the operating mechanism; the executing piece is arranged in the shell, one end of the executing piece is provided with a first limiting groove clamped with the pushing part, and the other end of the executing piece is hinged with a movable contact spring; the executing piece is also provided with a second limiting groove; the tripping piece is arranged in the shell, one end of the tripping piece is provided with a touch table, and the other end of the tripping piece is clamped in the second limiting groove; the tripping piece is used for abutting against the pushing part of the push rod so as to enable the pushing part to move in the first limiting groove of the executing piece. The operating mechanism of this application design is with low costs, the reaction is sensitive, simple structure.

Description

Novel circuit breaker

Technical Field

The utility model relates to an electrical equipment technical field especially relates to a novel circuit breaker.

Background

A circuit breaker is one of the most widely used terminal protection electric appliances in a building electric terminal distribution apparatus. The circuit breaker comprises an operating mechanism, a contact part, a protection device, an arc extinguishing system and the like. The working principle is as follows: the protection device (release) and the current thermal assembly are used for realizing overload and short-circuit protection, when the current passing through a coil in the current thermal assembly is larger than a set current value, a movable iron core of the electromagnetic release acts to push a striking rod to impact an operating mechanism, so that the operating mechanism is unlocked, the circuit breaker is opened, and then a circuit is disconnected, and the overload and short-circuit protection of the circuit is realized. When the circuit fault is discharged, the circuit is closed by the switching-on mechanism.

The circuit breaker is a common electrical appliance protection device in the prior art, and plays an important role in power supply and power utilization safety and people's life. Generally refers to a switching device that is capable of closing, carrying and opening current under normal circuit conditions, and closing, carrying and opening current under abnormal circuit conditions, including short circuit conditions, for a specified period of time. When the electric appliance is in serious overload or short circuit, undervoltage and other faults, the circuit can be automatically cut off. The quality of the circuit breaker is directly related to the safety problem of life, and the sensitivity and the tripping performance of the circuit breaker are important indexes for measuring the performance of the circuit breaker.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, the to-be-solved technical problem of the present invention is to provide a miniature circuit breaker with low cost, sensitive response and simple structure, for solving the technical problem of complicated structure of the circuit breaker in the prior art.

In order to achieve the above object, the utility model provides a novel circuit breaker, include: a housing; the operating mechanism is provided with a handle at one end exposed out of the shell; the other end of the operating mechanism arranged in the shell is a vertically arranged turntable; a limiting spring is hinged on the rotary table; one end of the push rod is pivoted to the bottom of the turntable, and the end part of the limiting spring props against the upper part of the push rod; the other end of the push rod is a pushing part; the limiting spring is used for limiting the upward displacement of the pushing part when the push rod is driven by the operating mechanism; the executing piece is arranged in the shell, one end of the executing piece is provided with a first limiting groove clamped with the pushing part, and the other end of the executing piece is hinged with a movable contact spring; the executing piece is also provided with a second limiting groove; the tripping piece is arranged in the shell, one end of the tripping piece is provided with a touch table, and the other end of the tripping piece is clamped in the second limiting groove; the tripping piece is used for abutting against the pushing part of the push rod so as to enable the pushing part to move in the first limiting groove of the executing piece.

In an embodiment of the present invention, a static contact is disposed in the housing; the static contact is of an arc full-enclosed structure.

In an embodiment of the present invention, when the circuit normally works, the circuit breaker is turned off and turned on, the handle is toggled to drive the push rod to move, and the push rod is clamped to the first limit groove of the actuating element under the action of the limit spring; and the actuating element drives the movable contact piece to be in contact with the static contact piece, so that the circuit works normally.

In an embodiment of the present invention, a leakage coil is further disposed in the housing; the leakage coil is wound on the coil framework and sleeved in the instantaneous notch-releasing coil; the leakage coil and the instantaneous notch coil share a magnetic yoke; an iron core is arranged in the coil framework.

In an embodiment of the present invention, when the circuit is failed, the leakage coil and/or the current flowing through the instantaneous trip coil is too large to generate a magnetic field, so that the iron core collides with the contact platform of the trip member, so that the trip member abuts against the pushing portion of the push rod to make it in the first limit groove of the actuating member, and the actuating member drives the movable contact piece and the static contact piece to be separated, and the circuit breaker is tripped and separated.

In an embodiment of the present invention, a fixing portion is further disposed in the housing for fixedly mounting the arc extinguish chamber.

In an embodiment of the present invention, the fixing portion is an insulating member.

In an embodiment of the present invention, an arc striking plate is disposed below the movable contact; the arc striking plate is of an arc structure, and the top end of the arc striking plate is of a vertical structure.

To sum up, the utility model relates to a novel circuit breaker has following beneficial effect:

1. the structure among the operating mechanism, the push rod, the executing piece and the tripping piece is simpler, and the cost is low;

2. the leakage coil designed by the application is sleeved in the instantaneous trip coil, so that the instantaneous trip function and the leakage protection function of the circuit breaker can be simultaneously met, the product space is greatly saved, and the product width is reduced; the breaker can be matched with other breakers to be installed on the same distribution box, so that the operation is more convenient and faster, and the practicability is higher;

3. the vertical design in top of this application run-on plate can strengthen the effect of striking.

Drawings

Fig. 1 is a schematic structural diagram of a novel circuit breaker in an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms indicating the orientation or the positional relationship such as "upper", "lower", "left", "right", "middle", "horizontal", "vertical", etc. cited in the present specification are also only for the sake of clarity of description, and are not intended to limit the implementable scope of the present invention, and changes or adjustments of the relative relationship thereof are considered to be the implementable scope of the present invention without substantial technical changes.

Furthermore, the terms "first" and "second" are used only to distinguish between different objects and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It should be noted that the drawings provided in the following embodiments are only schematic illustrations for explaining the basic concept of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, amount and proportion of each component in actual implementation can be changed at will, and the layout of the components can be more complicated.

For solving the prior art problem, the utility model provides a novel circuit breaker for solve the technical problem that the circuit breaker structure is complicated among the prior art. Hereinafter, the novel circuit breaker of the present invention will be explained in detail with reference to specific embodiments.

As shown in fig. 1, the structure of the novel circuit breaker according to the embodiment of the present invention is schematically illustrated, and the structure includes: the device comprises a shell 1, an operating mechanism 2, a limiting spring 3, a push rod 4, an executive component 5, a tripping component 6, a movable contact 7, a static contact 8, a leakage coil 9, an instantaneous tripping coil 10, a magnetic yoke 11, an iron core 12 and a fixing part 13, wherein the operating mechanism 2, the limiting spring 3, the push rod 4, the executive component, the tripping component, the instantaneous tripping component and the moving contact are arranged in the shell 1.

Specifically, the operating mechanism 2 is used for controlling the opening and closing of the circuit breaker. One end of the operating mechanism 2 exposed out of the shell 1 is a handle 201; the other end of the operating mechanism 2 arranged in the shell 1 is a vertically arranged turntable 202; a limiting spring 3 is hinged on the turntable 202. One end of the push rod 4 is pivoted to the bottom of the turntable 202, and the end of the limit spring 3 abuts against the upper part of the push rod 4; the other end of the push rod 4 is a pushing part 401; the limiting spring 3 is used for limiting the upward displacement of the pushing part 401 when the push rod 4 is driven by the operating mechanism 2. One end of the actuating element 5 is provided with a first limit groove clamped with the pushing part 401, and the other end is hinged with a movable contact piece 7; the executive component 5 is also provided with a second limit groove. One end of the release fastener 6 is provided with a contact platform 601, and the other end is clamped in the second limit groove of the executive component 5; the fastening releasing member 6 is used for abutting against the pushing part 401 of the push rod 4 so as to enable the push rod to move in the first limiting groove of the executing member.

It should be noted that the turntable 202, the actuating member 5, the release member 6 and the housing 1 may be detachably connected; or may be a fixed connection arrangement. The fixed connection mode includes but is not limited to threaded connection, adhesive connection, snap connection, welded connection, interference fit connection, magnetic connection and the like. This application adopts the fixed setting of threaded connection, can make mounting structure more firm, and the installation is simple, installation low cost.

It should be noted that the actuator 5 is hinged to the movable contact 7 by a torsion spring to form a contact angle similar to an "L" shape, so that the actuator 5 drives the movable contact 7 to rotate.

In some examples, a static contact 8 is further arranged in the shell 1, and the static contact 8 is of a circular arc full-enclosed structure. Because the action of the movable contact 7 belongs to instant action, the contact area of the movable contact 7 and the static contact 8 is increased, and the influence on the service life of the movable contact 7 and the static contact 8 due to over-violent stress can be avoided.

It should be noted that the handle 201 or the release member 6 controls the position relationship between the movable contact 7 and the stationary contact 8 through the push rod 4 to open or close the circuit breaker, thereby controlling the on/off of the circuit.

Specifically, when the circuit normally works, the circuit breaker is switched on and off, the handle 201 is toggled along the direction indicated by the arrow in the figure to drive the push rod 4 to displace towards the upper right, and the push rod is clamped to the first limit groove of the actuating element 5 under the action of the limit spring 3; meanwhile, the actuating member 5 rotates rightwards to drive the movable contact piece 7 to move leftwards to be close to and contact with the static contact piece 8, and the circuit works normally.

In some examples, a leakage coil 9 is also arranged in the shell 1; the leakage coil 9 is wound on the coil framework and is sleeved in the instantaneous trip coil 10; meanwhile, the leakage coil 9 and the instantaneous trip coil 10 share a yoke 11; and an iron core 12 is arranged in the coil framework.

Specifically, when a circuit fails, the current flowing through the leakage coil 9 and/or the instantaneous trip coil 10 is too large to generate a magnetic field, so that the iron core 12 impacts the contact platform 601 in the direction of the trip unit 6, the trip unit 6 abuts against the pushing portion 401 of the push rod 4 to displace the pushing portion to the left and lower in the first limit groove of the actuator 5, and the handle 201 is driven to move in the direction indicated by the arrow in the figure under the action of the limit spring 3; meanwhile, the executive component 5 rotates leftwards to drive the movable contact piece 7 to be far away from the static contact piece 8 and separated from the static contact piece, and the circuit breaker is tripped and opened.

In some examples, the contact surfaces of the pushing portion 401 and the release member 6 are arc-shaped to reduce friction, so as to facilitate the release member 6 to abut against the pushing portion 401 for displacement.

It should be noted that, the leakage coil 9 and the instantaneous trip coil 10 are integrated together, which not only can satisfy the instantaneous trip function and the leakage protection function of the circuit breaker at the same time, greatly save the product space and reduce the product width; can also cooperate installation and same block terminal with other circuit breakers, it is more convenient to operate, improves the practicality.

It should be noted that the magnetic yoke 11 is a yoke made of stacked silicon steel sheets, and is uniformly and symmetrically distributed around the induction coil to restrict outward diffusion of leakage flux of the induction coil.

In some examples, a fixing portion 13 is further provided inside the housing 1 for fixedly mounting the arc-extinguishing chamber 14, so as to prevent the arc-extinguishing chamber 14 from being reversely mounted.

Preferably, the fixing portion 13 is an insulating member.

It should be noted that the three uppermost grid plates on the right side of the arc extinguish chamber 14 are shorter than the other grid plates, and are clamped in the fixing portion 13, so as to ensure the distance between the grid plates and the static contact 8, and prevent the arc from jumping back and forth between the grid plates and the static contact 8 when the arc enters the arc extinguish chamber 14.

In some examples, an arc striking plate 15 is arranged below the movable contact piece 7; the arc striking plate 15 is of an arc structure, and the top end of the arc striking plate is of a vertical structure.

It should be noted that the vertical design of the top end of the arc striking plate 15 can effectively ensure that the electric arc rapidly enters the arc extinguishing chamber 14 along the arc striking plate 15 and the fixed contact 8.

To sum up, the application provides a novel circuit breaker, include: a housing; the operating mechanism is exposed out of one end of the shell and is provided with a handle; the other end of the operating mechanism arranged in the shell is a vertically arranged turntable; a limiting spring is hinged on the rotary table; one end of the push rod is pivoted to the bottom of the turntable, and the end part of the limiting spring props against the upper part of the push rod; the other end of the push rod is a pushing part; the limiting spring is used for limiting the upward displacement of the pushing part when the push rod is driven by the operating mechanism; the executing piece is arranged in the shell, one end of the executing piece is provided with a first limiting groove clamped with the pushing part, and the other end of the executing piece is hinged with a movable contact spring; the executing piece is also provided with a second limiting groove; the tripping piece is arranged in the shell, one end of the tripping piece is provided with a touch table, and the other end of the tripping piece is clamped in the second limiting groove; the tripping piece is used for abutting against the pushing part of the push rod so as to enable the pushing part to move in the first limiting groove of the executing piece. The novel circuit breaker has the characteristics of low cost, sensitive response, simple structure and the like; the leakage coil is sleeved in the instantaneous trip coil, so that the instantaneous trip function and the leakage protection function of the circuit breaker can be simultaneously met, the product space is greatly saved, and the product width is reduced; can also install with same block terminal with other circuit breakers cooperations, it is more convenient to operate, and the practicality is higher.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A novel circuit breaker, comprising:

a housing;

the operating mechanism is provided with a handle at one end exposed out of the shell; the other end of the operating mechanism arranged in the shell is a vertically arranged turntable; a limiting spring is hinged on the rotary table;

one end of the push rod is pivoted to the bottom of the turntable, and the end part of the limiting spring props against the upper part of the push rod; the other end of the push rod is a pushing part; the limiting spring is used for limiting the upward displacement of the pushing part when the push rod is driven by the operating mechanism;

the executing piece is arranged in the shell, one end of the executing piece is provided with a first limiting groove clamped with the pushing part, and the other end of the executing piece is hinged with a movable contact spring; the executing piece is also provided with a second limiting groove;

the tripping piece is arranged in the shell, one end of the tripping piece is provided with a touch table, and the other end of the tripping piece is clamped in the second limiting groove; the disengaging piece is used for abutting against the pushing portion of the push rod so as to enable the pushing portion to move in the first limiting groove of the executing piece.

2. The novel circuit breaker as claimed in claim 1, wherein a static contact is provided in said housing; the static contact is of an arc full-enclosed structure.

3. The novel circuit breaker according to claim 2, characterized in that when the circuit normally works, the circuit breaker is switched on and off, the handle is toggled to drive the push rod to move, and the push rod is clamped to the first limit groove of the actuating member under the action of the limit spring; and the actuating element drives the movable contact piece to be in contact with the static contact piece, so that the circuit works normally.

4. The novel circuit breaker according to claim 1, characterized in that a leakage coil is further provided in the housing; the leakage coil is wound on the coil framework and is sleeved in the instantaneous trip coil; the leakage coil and the instantaneous trip coil share a magnetic yoke; an iron core is arranged in the coil framework.

5. The novel circuit breaker as claimed in claim 4, wherein a static contact is provided in said housing; when a circuit is in fault, the current flowing through the leakage coil and/or the instantaneous trip coil is overlarge to generate a magnetic field, so that the iron core impacts a contact platform of the trip piece, the trip piece props against a pushing part of the push rod to enable the trip piece to move in a first limiting groove of the actuating piece, the actuating piece drives the movable contact and the static contact to be separated, and the circuit breaker is tripped and opened.

6. The novel circuit breaker according to claim 2, wherein a fixing portion is further provided in the housing for fixedly mounting the arc-extinguishing chamber.

7. The circuit breaker as claimed in claim 6, wherein the fixed portion is an insulating member.

8. The novel circuit breaker according to claim 1, characterized in that an arc striking plate is arranged below the movable contact; the arc striking plate is of an arc structure, and the top end of the arc striking plate is of a vertical structure.