CN202651022U

CN202651022U - Over-current protection breaker

Info

Publication number: CN202651022U
Application number: CN 201220192702
Authority: CN
Inventors: 沈继勋
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2013-01-02
Anticipated expiration: 2022-04-28

Abstract

The utility model relates to an over-current protection breaker, comprising a pull hook. The pull hook comprises a pull rod connected with an over-current protection switch, a holder hook arranged at the lower end of the pull rod and a tongue depressor arranged on the pull rod, one end of a bimetallic strip of the over-current protection breaker is fixedly connected with a first pole piece, and the other end is equipped with a groove sunken towards a second pole piece direction of the over-current protection switch. The over-current protection breaker is characterized in that one end of the tongue depressor close to the groove is bent towards the side wall direction of the groove. Compared with the prior art, by bending the tongue depressor on the pull rod, the tongue depressor does not slide off into the groove automatically when presses down the bimetallic strip, so that the service life of the over-current protection switch is prolonged.

Description

A kind of Over Current Circuit Breaker

Technical field

The utility model relates to a kind of Over Current Circuit Breaker.

Background technology

Along with the development of industrial technology, power supply and various electrical equipment have been penetrated into the every field of people's daily life, work.Along with the increasingly extensive use of various electrical equipment, the safety issue of electrical appliance also becomes increasingly conspicuous.In order to guarantee Electrical Safety, people are provided with the overcurrent protection circuit breaker in circuit, and protector circuit breaker automatic disconnection circuit when the circuit abnormal current transships is to avoid the generation of peril.

Existing overcurrent protection circuit breaker generally includes housing, switch block and overload protection parts and two pole pieces that are connected with circuit.Wherein be provided with the bimetal leaf conducting between the first pole piece and the second pole piece, an end of bimetal leaf is fixedly connected with the first pole piece, and the action of the other end contact of bimetal leaf by pull hook can be closed or be disconnected and being connected of the second pole piece; Described pull hook connects the button that is arranged on the housing.When the circuit abnormality electric current is excessive, the bimetal leaf temperature distortion, disconnect with the second pole piece between be connected; When circuit recovers normal, push button, the contact of bimetal leaf is contacted with the second pole piece contact, circuit is namely closed.

Existing bimetal leaf is saucer-like configuration, which is provided with groove, thereby riveted joint is useful on the contact of touching the second pole piece connection circuit in the groove; Described pull hook generally includes the pull bar that is connected with button and the pressure tongue that is arranged on the pull bar, and this pressure tongue is straight plate shape, and the lower end of pull bar connects hook.The other end of sheet metal is between described hook and pressure tongue.After the overheated existing spring of sheet metal, this moment pressing keys, the button pushing drawing rod presses down, and contacts energising thereby the other end of pressing tongue to promote bimetal leaf is moved down with the second pole piece.

Because pressing tongue is straight plate shape, it is easy to slide in the bimetal leaf groove when the pushing bimetal leaf, and bimetal leaf is resetted, and this Over Current Circuit Breaker just can't have been used like this, has influence on the useful life of this Over Current Circuit Breaker.

Summary of the invention

Technical problem to be solved in the utility model is the Over Current Circuit Breaker that a kind of long service life is provided for the present situation of prior art.

The utility model solves the problems of the technologies described above the technical scheme that adopts: this Over Current Circuit Breaker; comprise pull hook; described pull hook comprises the pull bar that is connected with overcurrent protective switch, be arranged on the hook of pull bar lower end and be arranged on pressure tongue on the pull bar; one end of the bimetal leaf of overcurrent vreaker is fixedly connected with the first pole piece; the other end of bimetal leaf is provided with the groove that protrudes to the second pole piece direction; under the groove contact is installed, it is characterized in that described pressure tongue outwards turns down towards the sidewall direction of described groove near an end of described groove.

The longitudinal section of described groove is up big and down small trapezium structure.

Preferably, described pressure tongue can be up big and down small wedge structure.

Compared with prior art; the utility model will press tongue to be designed to bending shape; can make and press tongue when pressing down bimetal leaf; can not be slipped in the groove; cause bimetal leaf to reset; problem with regard to avoiding this Over Current Circuit Breaker to use has effectively prolonged the useful life of this Over Current Circuit Breaker like this.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model embodiment assembly structure.

Fig. 2 is the schematic perspective view that the utility model embodiment removes remaining part assembly structure behind the shell;

Fig. 3 is the front view of pull hook among the utility model embodiment;

Fig. 4 and Fig. 5 are the end view of Fig. 1;

Fig. 6 and Fig. 7 are the schematic perspective view of pull hook different angles among the utility model embodiment.

Embodiment

Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.

To shown in Figure 7, this overcurrent protective switch comprises such as Fig. 1:

Housing 1 is the shell of this overcurrent protective switch, is provided with other parts of overcurrent protective switch in it.

The first pole piece 2 and the second pole piece 3 are the connector of this Over Current Circuit Breaker and circuit, and its part exposes to outside the housing 1, and remainder is positioned at housing 1.

Bimetal leaf 4 is positioned at housing 1, is heated and can kick be out of shape, and is the critical component of this Over Current Circuit Breaker.The one end is fixedly connected with the first pole piece 2, and the end of the other end is provided with recessed groove 41.The longitudinal section of groove 41 reaches on being lower little trapezoidal, and riveted joint has the contact under the groove.

Pull hook 5 is arranged in the housing 1, comprises pull bar 51, pull hook 52 and presses tongue 53.Wherein, pull hook 52 is positioned at the lower end of pull bar 51; Pressing tongue 53 is up big and down small wedge structure, and it is positioned on the shaft of pull bar, and presses the lower end of tongue 53 to the lateral wall bending of groove, and forming the longitudinal section is the structure of fold-line-shaped.Pull hook in the present embodiment is formed in one.The other end of above-mentioned bimetal leaf 4 is between hook 52 and pressure tongue 53, and hook 52 is near the periphery wall of grooves 41.

Button 6 is arranged on the housing wall, and the upper end of pull bar connects the left part of button.

The operation principle of this overcurrent vreaker is as follows:

During use, the first pole piece 2 and second pole piece 3 of this Over Current Circuit Breaker is connected in the circuit, when circuit was normal, electric current flowed out circuit turn-on by the first pole piece and bimetal leaf finally by the second pole piece.When short circuit or other reason were unusual, the electric current of the bimetal leaf of flowing through increased, the bimetal leaf upwards kick of being heated, the other end of bimetal leaf break away from the second pole piece 3 be connected the circuit disconnection.When circuit recovers normal, pressing keys 6, button 6 pushing drawing rods move down, and make to press the hypogloeeis to press the other end of bimetal leaf.When button press put in place after, the other end of bimetal leaf namely connects the second pole piece, circuit is conducting again.

Claims

1. Over Current Circuit Breaker; comprise pull hook; described pull hook comprises the pull bar that is connected with overcurrent protective switch, be arranged on the hook of pull bar lower end and be arranged on pressure tongue on the pull bar; one end of the bimetal leaf of Over Current Circuit Breaker is fixedly connected with the first pole piece; the other end of sheet metal is provided with the recessed groove that goes out of the second pole piece direction to overcurrent protective switch, it is characterized in that described pressure tongue near an end of described groove outwards towards the sidewall direction bending of described groove.

2. Over Current Circuit Breaker according to claim 1 is characterized in that described pressure tongue is up big and down small wedge structure.