CN2519396Y

CN2519396Y - Safety switch

Info

Publication number: CN2519396Y
Application number: CN 01269689
Authority: CN
Inventors: 黄英哲
Original assignee: JOEMEX ELECTRIC CORP
Current assignee: JOEMEX ELECTRIC CORP
Priority date: 2001-12-14
Filing date: 2001-12-14
Publication date: 2002-10-30
Anticipated expiration: 2011-12-14

Abstract

The model utility relates to a safety switch which comprises a shell, the upper part of which is provided with a pressure key, and the bottom of the shell is provided with a first pin, a second pin and a third pin. The top of the second pin is provided with an active plate which can swing, and one end of the active plate contacts with the first pin. A location post extends from the bottom of the pressure key, and an elastic component is arranged between the location post and the active plate, and a leading pin contacts with the elastic component and the third pin extends from an indicating lamp. Because a spring and a resistance is arranged between the top of the third pin and the leading pin, the contacting area and the withstanding pressure can be increased, and the deposited carbon can be reduced, achieving the aim of prolonging the service life.

Description

Safety switch

Technical field

The relevant a kind of safety switch of the utility model.

Background technology

Safety switch is a not reason overload and produce the device of disaster of a kind of circuit of protecting coupled electric equipment products inside.The configuration of safety switch as shown in Figure 4, its housing 40 top opening parts are provided with one and press key 50, press in the key 50 and be provided with indicator light 51, housing 40 bottoms have to be and run through in it in addition, outer first, two, three pins 41,42,43, first pin, 41 tops are formed with contact 411, second pin, 42 tops are provided with an activity template 60, and an end of activity template 60 corresponding contacts 411 has platinum contact 61, other presses key 50 bottom surfaces and 60 of activity templates to be folded with elastic component 54, and indicator light 51 is extended with two pins 52 again respectively, 53, a pin 53 and contact conducting wherein with elastic component 54.

This safety switch under normal circumstances, its first and second pin 4142 is to be conducting state by activity template 60, in addition, again by elastic component 54, indicator light 51 and pin 52,53, makes the 3rd pin 43 form ground states.

Pin and contact condition between the 3rd pin are and contact, so its contact area is minimum, have the not good and carbon distribution situation important disadvantages of conduction, so improved necessity is in addition arranged really.

The utility model content

The purpose of this utility model provides a kind of long service life and can increase the safety switch of contact contact area.

For achieving the above object, safety switch of the present utility model, it has a top and is provided with the housing of pressing key, the housing bottom surface has runs through its first, second and third inside and outside pin, the second pin top is provided with the activity template that can swing, activity template one end can contact with first pin, press key bottom surface projection that reference column is arranged, be provided with elastic component between reference column and the activity template, indicator light is extended with the pin that can contact with elastic component and the 3rd pin respectively, is characterized in: be provided with spring and resistance between the 3rd pin top and the pin.

Adopt such scheme, owing to be provided with spring and resistance between its 3rd pin top and the pin, thus can increase contact area therebetween and support the pressure of pulling, and reduce carbon distribution, to increase the service life.

Understand the purpose of this utility model, characteristics and advantage for clearer, preferred embodiment of the present utility model is elaborated below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 be the utility model one preferred embodiment decomposing schematic representation.

Fig. 2 is the generalized section of the utility model one preferred embodiment.

Fig. 3 is the user mode schematic diagram of the utility model one preferred embodiment.

Fig. 4 is the generalized section of existing structure.

Embodiment

The relevant a kind of safety switch of the utility model, please cooperate referring to Figure 1 and Figure 2, it has a housing 10, housing 10 tops form opening, and opening part is provided with one and presses key 20, press key 20 inside and be provided with indicator light 21, the place, bottom surface that is positioned at housing 10 in addition is provided with to be runs through it, the first outer pin 11, second pin 12 and the 3rd pin 13, and the top bending of first pin 11 is formed with contact 111, the top of second pin 12 then is provided with an activity template 30, this activity template 30 is formed with a caulking groove 31, and be and swing form, contact 111 1 ends of its corresponding first pin 11 also correspondence are provided with platinum contact 31, the 3rd pin 13 tops then are sequentially provided with a spring 131 and a resistance 132, in addition, resistance 132 is positioned in the resistance groove of housing 10 inside, and be provided with salient point in the resistance groove for fixed resistance 132, press the bottom surface centre projection of key 20 that a reference column 23 is arranged, be arranged with elastic component 24 on the reference column 23, and elastic component 24 bottoms are arranged in the caulking groove 31, indicator light 21 is extended with two pins 22 respectively in addition, and wherein a pin 22 is to contact conducting with elastic component 24.

Under normal circumstances; first pin 11 and second pin 12 are to be conducting state by activity template 30; and in addition by elastic component 24, indicator light 21, pin 22, resistance 132 and spring 131; make the 3rd pin 13 form ground state; and when overload condition; cooperate again referring to shown in Figure 3; activity template 30 can be because overheated and warpage; and pushing tow elastic component 24; make elastic component 24 drive whole pressure key 20 beat escapes; protecting coupled electric equipment products, and avoid the circuit of this electric equipment products inside to damage.

Adopt said structure design of the present utility model, the utility model safety switch has the following advantages:

1. increase the contact contact area: because its 3rd pin top is provided with again spring and resistance, for indication The pin contact that lamp extends not only can increase contact area therebetween, more can increase supporting of its Contact and pull Pressure.

2. long service life: because the contact area of its contact is big, so can reduce the carbon distribution situation of contact, can prolong Service life.

Claims

1. safety switch, it has a top and is provided with the housing of pressing key, the housing bottom surface has runs through its first, second and third inside and outside pin, the second pin top is provided with the activity template that can swing, activity template one end can contact with first pin, presses key bottom surface projection that reference column is arranged, and is provided with elastic component between reference column and the activity template, indicator light is extended with the pin that can contact with elastic component and the 3rd pin respectively, it is characterized in that:

Be provided with spring and resistance between the 3rd pin top and the pin.