CN202384225U

CN202384225U - Dustproof micro switch

Info

Publication number: CN202384225U
Application number: CN2011205399950U
Authority: CN
Inventors: 周永安; 赵自和; 黎乾文; 吴彪; 黄云辉; 胡娟英
Original assignee: XIAMEN GOLDEN-SWITCH ELECTRONICS Co Ltd
Current assignee: XIAMEN GOLDEN-SWITCH ELECTRONICS Co Ltd
Priority date: 2011-12-21
Filing date: 2011-12-21
Publication date: 2012-08-15
Anticipated expiration: 2021-12-21

Abstract

The utility model discloses a dustproof micro switch. The dustproof micro switch comprises a shell, and a tension spring, a movable contact spring, fixed contacts and a moving contact, which are arranged in the shell, wherein the tension spring is arranged on a bracket, is controlled by a key, and is connected with the movable contact spring; a fixed contact contacting or separated from the moving contact on the movable contact spring is arranged at the inner end of each of a normally closed terminal and a normally open terminal respectively; the outer end of each of the bracket, the normally closed terminal and the normally open terminal is extended from the shell to form a connecting terminal; and a waterproof adhesive is filled into a joint of each connecting terminal and a corresponding through hole of the shell to prevent dust particles from entering the shell. A dustproof effect is achieved by dispensing the adhesive at the joints of the connecting terminals of the switch and the through holes of the shell and adopting mechanical fit for a joint of the key and a cover plate and the jointing surface of the cover plate and a substrate, so that cost is saved, and the requirements of dust tightness of IP50 can be met.

Description

Dustproof sensitive switch

Technical field

The utility model discloses a kind of dustproof sensitive switch, divides by International Patent Classification (IPC) (IPC) to belong to sensitive switch manufacturing technology field.

Background technology

Existing sensitive switch generally is made up of normally closed terminal, Chang Kaiduan, housing, fixed contact, moving contact, extension spring, movable contact spring, button etc.; Operation principle is following: through the downward displacement action compressing extension spring of button; Extension spring drives movable contact spring, and the moving contact on the movable contact spring contacts conducting with the fixed contact of Chang Kaiduan, after the downward force of button disappears; Extension spring resets, and the moving contact on the movable contact spring just contacts with the fixed contact of normally closed terminal.

Sensitive switch can be divided into plain edition, water proof type and dust-protection type, and wherein dustproof switch is between plain edition and water proof type, and common sensitive switch can only be used for normal environment for use owing to receive the limitation of structural design.Right when peripheral environment for use become abominable the time, as when running into many dust, sensitive switch is not owing to possess dust reduction capability, therefore hardware in the switch will be affected, and makes switch contact resistance become big, even switches on or short circuit etc.And the water proof type sensitive switch causes cost higher because no matter strict from parts material and structure aspects its protection level is high.

Summary of the invention

To the deficiency of prior art, the utility model provides a kind of rational in infrastructure, safe and reliable dustproof sensitive switch, and it reaches dustproof IP50 rank, and production cost is low simultaneously.

For achieving the above object, the utility model is realized through following technical scheme:

A kind of dustproof sensitive switch; Comprise housing and interior extension spring, movable contact spring, fixed contact, moving contact thereof; Extension spring is arranged on the support and by by key control, extension spring is connected with movable contact spring, normally closed terminal and normal beginning be inner be equipped with respectively with movable contact spring on moving contact contact or the fixed contact that separates; The outer end of support, normally closed terminal and normal beginning extends to housing respectively and forms binding post outward, and binding post and housing through hole junction are filled out and sealed marine glue and enter in the housing to prevent dust granules.

Further, described housing is made up of basic base and cover plate, and the periphery of pedestal is provided with cannelure, and the projection that cover plate matches is fastened in the cannelure of pedestal, and the ring slot outside wall top end face of pedestal and cover plate maintain an equal level.

Further, the depression sealing that cooperates with cover plate of described pedestal cannelure madial wall.

Further, described button top is exposed on the cover plate, and button and the sealing of cover plate through hole mechanical engagement.

The utility model is at the binding post of switch and housing through hole junction point glue; And in button and cover plate junction and cover plate and pedestal faying face all adopt the mechanical engagement mode to reach dustproof effect; Thereby practiced thrift cost, can reach the requirement of dustproof IP50 simultaneously.

Description of drawings

Fig. 1 is the utility model front view;

Fig. 2 is the utility model end view;

Fig. 3 is the utility model cut-away view;

Fig. 4 is the diagram of the utility model circuit.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

Embodiment: see also Fig. 1 to Fig. 4; A kind of dustproof sensitive switch; Comprise housing and interior extension spring 2, movable contact spring 9, fixed contact 7, moving contact 8 thereof; Extension spring 2 is arranged on the support 3 and by button 10 controls, extension spring 2 is connected with movable contact spring 9, normally closed terminal 6 and normal sub 5 the inners of beginning be equipped with respectively with movable contact spring on moving contact 8 fixed contact 7 that contacts or separate; The outer end of support 3, normally closed terminal 6 and normal beginning 5 extends to housing respectively and forms binding post outward, and binding post and housing through hole junction are filled out and sealed marine glue 11 and enter in the housing to prevent dust granules.Described housing is made up of pedestal 4 and cover plate 1, and the periphery of pedestal 4 is provided with cannelure 40, and the projection that cover plate matches is fastened in the cannelure of pedestal, and the ring slot outside wall top end face of pedestal and cover plate are fair.The depression sealing that described pedestal 4 cannelure madial walls cooperate with cover plate.Described button 10 tops are exposed to cover plate, and button and the sealing of cover plate through hole mechanical engagement.

The utlity model has following beneficial effect:

1, switch surface aesthetic behind a glue does not have defectives such as the glue of leakage, glue are not done, poor bonding strength;

2, the switching manipulation spring is sensitive, and mechanism is flexible, no catching phenomenon;

3、OF：250gf(Max)；RF>60?gf；

4, contact resistance :≤30m Ω (initial value); Insulation resistance:>=100 M Ω (500VDC); Proof voltage: terminal this, AC1000V/1min is between terminal and shell: AC1500V/min;

5, degree of protection: IP50;

6, after the some adhesive curing, vertical pushing power and the non-loosening that terminal can bear 3Kg with get loose phenomenon;

7, properties of product meet GB15092.1-2010, IEC61058-1, UL1054 standard.

The above record is merely the embodiment that utilizes this origination techniques content, anyly is familiar with modification, the variation that this creation of this art utilization is done, and all belongs to the claim of this creation opinion, and is not limited to embodiment announcement person.

Claims

1. dustproof sensitive switch; It is characterized in that: comprise housing and interior extension spring, movable contact spring, fixed contact, moving contact thereof; Extension spring is arranged on the support and by by key control; Extension spring is connected with movable contact spring; Normally closed terminal and normal beginning be inner be equipped with respectively with movable contact spring on moving contact contact or the fixed contact that separates, the outer end of support, normally closed terminal and normal beginning extends to housing respectively and forms binding post outward, and binding post and housing through hole junction are filled out and sealed marine glue and enter in the housing to prevent dust granules.

2. dustproof sensitive switch according to claim 1; It is characterized in that: described housing is made up of basic base and cover plate; The periphery of pedestal is provided with cannelure, and the projection that cover plate matches is fastened in the cannelure of pedestal, and the ring slot outside wall top end face of pedestal and cover plate maintain an equal level.

3. dustproof sensitive switch according to claim 1 is characterized in that: the depression sealing that described pedestal cannelure madial wall cooperates with cover plate.

4. according to the described dustproof sensitive switch of one of claim 1 to 3, it is characterized in that: described button top is exposed on the cover plate, and button and the sealing of cover plate through hole mechanical engagement.