CN201178216Y

CN201178216Y - Leakage protecting plug

Info

Publication number: CN201178216Y
Application number: CNU2008200831147U
Authority: CN
Inventors: 钱加灿
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-30
Filing date: 2008-01-30
Publication date: 2009-01-07
Anticipated expiration: 2018-01-30

Abstract

The utility model relates to a power-leakage protection plug which comprises a pedestal; phase line, zero line and ground line which are provided with switches, a zero-sequence current transformer arranged between the phase line and the zero line, a test loop, an amplifying circuit, a DC power source, a silicon-controlled rectifier and a tripper. The switch comprises a movable spring and a static contact. The movable spring is zigzag-shaped. A support sheet is supported between the vertical edge of the zigzag-shaped movable spring and the pedestal. The power-leakage protection plug has the advantages that: the support sheet is supported between the vertical edge of the zigzag-shaped movable spring and the pedestal, so as to ensure the elasticity of the movable spring, ensure the in-time separation between the moving contact of the movable spring and the static contact during the operation of the power-leakage protection plug, prevent the moving contact of the movable spring from deviating from the static contact due to the increase in the included angle between the support sheet and the base plate when the movable spring is strained, and ensure the correct alignment between the movable spring and the static contact, thereby improving the safety of the power-leakage protection plug.

Description

Leakage protecting plug

Technical field

The utility model relates to a kind of leakage protecting plug.

Background technology

Existing leakage protecting plug; generally comprise belt switch phase, zero, three utmost points, be located at zero sequence current mutual inductor, test loop, amplifying circuit, rectifier, controllable silicon, release between phase, the zero line; switch is made up of movable contact spring and still; when zero sequence current mutual inductor detects when between load phase, the zero line residual current being arranged; will induce voltage by zero sequence current mutual inductor and after amplifier amplifies, make movable contact spring leave fixed contact, thereby disconnect the switch on phase, the zero line by release.But ground wire wherein is belt switch both, can not be with yet, if belt switch then is made up of the movable contact spring and the fixed contact that drive the contact, also be installed with zero sequence current mutual inductor detection ground wire in the ground wire whether leakage current is arranged, it has or not the residual current except detecting between load phase, the zero line, and also detecting has the leakage current of denying to pass through between ground wire.When phase line, zero line or ground wire broke down respectively or simultaneously, two magnetic test coils all can make release immediately phase, zero, ground wire all be disconnected, and promptly cut off the electricity supply, thereby have ensured personal safety effectively, therefore are used widely in household electrical appliance.But because leakage protecting plug has adopted the construction of switch of movable contact spring and fixed contact; so there is following shortcoming: owing to be subjected to the restriction of whole earth leakage circuit-breaker general structure; movable contact spring in the switch needs certain altitude and becomes " it " shape; movable contact spring often moves; in the course of time can influence its elasticity; and make moving contact and fixed contact disjunction in time on the movable contact spring, thereby influence security performance.

Summary of the invention

Technical problem to be solved in the utility model is to provide safety plug at the defective of above-mentioned prior art, makes its movable contact spring keep elasticity, thereby guarantees moving contact and the timely disjunction of fixed contact on the movable contact spring, the fail safe that improves earth leakage circuit-breaker.

The utility model solves the problems of the technologies described above the technical scheme that is adopted:

Leakage protecting plug; comprise base, belt switch phase, zero, three utmost points, be located at zero sequence current mutual inductor, test loop, amplifying circuit, DC power supply, controllable silicon, release between phase, the zero line; switch is made up of movable contact spring and fixed contact; movable contact spring becomes " it " font, it is characterized in that: have a support chip to support between the vertical edge of described movable contact spring " it " font and base.

Compared with prior art, advantage of the present utility model is:

There is a support chip to support between the vertical edge of movable contact spring " it " font and base; can guarantee the elasticity of movable contact spring; guarantee that earth leakage circuit-breaker does the moving contact of time spent movable contact spring and in time separating of fixed contact; prevent that movable contact spring from making the moving contact on the movable contact spring depart from fixed contact because of pressurized diminishes at the angle of support chip place and base plate; guarantee movable contact spring and the fixed contact correct location between the two, thus the fail safe that improves leakage protecting plug.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Embodiment

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

Fig. 1 is the structural representation of leakage protecting plug, and it comprises base plate 1, release 3, movable contact spring 2, fixed contact 4, and movable contact spring becomes " it " font, has a support chip 5 to support between its vertical edge 22 and base plate.

Because 2 one-tenth " it " fonts of movable contact spring, release 3 is done the time spent, movable contact spring 2 tops 23 are depressed, and drive vertical edge 22 actions, in the course of time, if there is not support chip 5, then vertical edge 22 can be depressed by top 23 and change the angle of 1 of vertical edge 22 and base plate, and the moving contact 6 and the fixed contact 4 of movable contact spring top 23 also can misplace, but also influence the elasticity of movable contact spring, cause moving contact can not separate, see Fig. 3 with fixed contact.

Above-mentioned support chip 5 best triangularities, leg-of-mutton one side is close to movable contact spring " it " font vertical edge 22, and another side and base plate 1 are close to, and can support movable contact spring better like this.

Above-mentioned support chip 5 also can be made of one with movable contact spring 2.

Because the circuit structure of leakage protecting plug and triggering dropout principle have been known, therefore are not described in detail in this.

Claims

1, leakage protecting plug; comprise base, belt switch phase, zero, three utmost points, be located at zero sequence current mutual inductor, test loop, amplifying circuit, DC power supply, controllable silicon, release between phase, the zero line; switch is made up of movable contact spring and fixed contact; movable contact spring becomes " it " font, it is characterized in that: have a support chip to support between the vertical edge of described movable contact spring " it " font and base.

2, leakage protecting plug as claimed in claim 1 is characterized in that: described support chip is triangular in shape, and leg-of-mutton one side is close to movable contact spring " it " font vertical edge, and another side and base plate are close to.