CN201259854Y

CN201259854Y - Water-proof microswitch

Info

Publication number: CN201259854Y
Application number: CNU2008201453969U
Authority: CN
Inventors: 杨小岚; 张军峰
Original assignee: XIAMEN GOLDEN-SWITCH ELECTRONICS Co Ltd
Current assignee: XIAMEN GOLDEN-SWITCH ELECTRONICS Co Ltd
Priority date: 2008-08-27
Filing date: 2008-08-27
Publication date: 2009-06-17
Anticipated expiration: 2018-08-27

Abstract

The utility model relates to a switch, in particular to an improved microswitch; a waterproof type microswitch comprises a normally closed terminal, a normally open terminal, a bracket, a base, a cover board, a static contact, a moving contact, a tension spring, a movable contact spring and a keystoke; the waterproof type microswitch mainly comprises a sealing ring which is a bowl shape, the bowl bottom of which is hollow; the bowl bottom of the bowl-shaped sealing ring is closely matched with a concave edge of the keystoke; waterproof adhesive is filled at the contact periphery of the bowl edge of the sealing ring and the cover board, at the closing periphery of the base and the cover board, and at the position where the normally closed terminal, the normally open terminal and the bracket penetrate the base. The sealing ring is adopted and the waterproof adhesive is filled at the position of seams, therefore, the microswitch has good waterproof and dustproof performance; in addition, the structure is simple and reliable; therefore, the switch is a practical waterproof type microswitch.

Description

A kind of water proof type sensitive switch

Technical field

The utility model relates to a kind of switch, relates in particular to a kind of modified model of sensitive switch of tool waterproof.

Background technology

Common sensitive switch generally is made up of normally closed terminal, Chang Kaiduan, support, pedestal, cover plate, fixed contact, moving contact, extension spring, movable contact spring, button.Extension spring is arranged at support and movable contact spring place, downward displacement action compressing extension spring by button, extension spring drives movable contact spring, moving contact on the movable contact spring just 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 commonly used can only be used for normal environment for use owing to be subjected to the limitation of structural design.Right when peripheral environment for use change abominable, as run into that water drenches or during many dust, sensitive switch is not owing to possess functions of waterproof and dustproof, hardware in the switch, will therefore cause adverse effect as normal-closed end, Chang Kaiduan, support, fixed contact, moving contact, extension spring, movable contact spring, make switch contact resistance become big, not even energising or short circuit etc.

The utility model content

The utility model is exactly at the problems referred to above, designs a kind of sensitive switch with waterproof and dustproof function, is the modified model of common sensitive switch.

For achieving the above object, technical scheme below the utility model adopts:

A kind of water proof type sensitive switch comprises normally closed terminal, Chang Kaiduan, support, pedestal, cover plate, fixed contact, moving contact, extension spring, movable contact spring, button.Main, also comprising sealing ring, described sealing ring is the bowl type of bowl end hollow out, closely cooperates with the recessed edge of button place at the bottom of the sealing ring bowl.

Further, the bowl edge of sealing ring contacts the periphery place with cover plate, and pedestal and cover plate cover the periphery place, and normally closed terminal, Chang Kaiduan, support run through the pedestal place all fills out the envelope marine glue.

Further, described sealing ring is that elastomeric material is made and had suitable elastic-restoring force.

Further, described fixed contact, moving contact are silver alloy.

Further, described extension spring, endurance anticorrosive, resistant to elevated temperatures characteristic metal wire rod for having.

The utility model is filled out the envelope marine glue because of the employing sealing ring and at the seam crossing of each parts, thus the fine water proof and dust proof of this sensitive switch energy, and simple and reliable for structure, be a kind of water proof type sensitive switch of practicality.

Description of drawings

The whole cutaway view of Fig. 1 the utility model;

Fig. 2 the utility model overall structure external form figure;

Fig. 3 covering plate structure outline drawing;

Fig. 4 base construction outline drawing;

Fig. 5 supporting structure outline drawing;

Fig. 6 Chang Kaiduan minor structure outline drawing;

Fig. 7 normal-closed end minor structure outline drawing;

Fig. 8 ring structure outline drawing;

Fig. 9 sealing ring cutaway view;

Figure 10 press-key structure outline drawing;

Figure 11 extension spring construction profile figure;

Figure 12 movable contact spring construction profile figure;

Figure 13 moving contact construction profile figure;

Figure 14 fixed contact construction profile figure.

Embodiment

Existing accompanying drawings further specifies the utility model.

As shown in Figure 1, the utility model comprises normally closed terminal (6), Chang Kaiduan (5), support (3), pedestal (4), cover plate (1), fixed contact (7), moving contact (8), extension spring (2), movable contact spring (9), button (11).Main is that the utility model also comprises sealing ring (10).As shown in Figure 8, sealing ring (10) is the bowl type of bowl end hollow out.Sealing ring as shown in Figure 9 (10) cutaway view has a hole in its top as can be seen.As shown in figure 10, there is a circle sunken inside edge button (11) handle upper end, and the circular hole at sealing ring (10) top and the recessed edge of button (11) place closely cooperate, because of sealing ring (10) is made for whippy rubber, can tight collapse in the recessed edge of button (11) place, play water-proof function.

As shown in Figure 1, the bowl edge of sealing ring contacts periphery place (111) with cover plate, as shown in Figure 2, pedestal (4) covers periphery place (113) with cover plate (1), as shown in Figure 1, normally closed terminal (6), Chang Kaiduan (5), support (3) run through pedestal (4) and locate (112) and all fill out the envelope marine glue.By the envelope of filling out of sealing ring (10) and marine glue, the utility model can possess water-proof function completely.

As shown in Figure 3, Figure 4, the utility model was wrapped in hardware wherein by pedestal (4) and cooperating of cover plate (1), and pedestal (4) is plastic member with cover plate (1).

As Fig. 5, Fig. 6, shown in Figure 7, normally closed terminal of the present utility model (6), Chang Kaiduan (5), support (3) run through pedestal (4) bottom and expose binding post.Normally closed terminal (6), Chang Kaiduan (5), support (3) are Cu alloy material, so less resistivity is arranged.

As shown in figure 11, described extension spring (2) is a metal wire rod, and has anticorrosive, endurance, resistant to elevated temperatures characteristic, can not have rusty stain by 48 hours salt mist tests, and mechanical endurance, test can reach 10,000,000 time.

As shown in figure 12, be described movable contact spring (9) construction profile figure.Movable contact spring (9) has two holes, and wherein front aperture is riveted joint moving contact (8) usefulness, moving contact (8) external form as shown in figure 13, it is riveted after passing this front aperture.The back stomidium of movable contact spring (9) is used for articulating extension spring (2).

As shown in figure 14, fixed contact (7) is the silver alloy of rivet-like.Two fixed contacts (7) are riveted on the circular hole of the upper end of normally closed terminal (6), Chang Kaiduan (5).

Described moving contact (8) and fixed contact (7) are silver alloy, have hardness and the arc extinction performance of better thermal stability, resistance fusion welding, anti-scaling loss and Geng Gao, and contact resistance are little.

Operation principle of the present utility model is: apply external force and drive button (11) to bottom offset, extension spring (2) is depressed in button (11) lower end, extension spring drives movable contact spring (9), the moving contact (8) of the riveted joint on the movable contact spring (9) just contacts conducting with the fixed contact (7) of Chang Kaiduan (5), after the downward force of button (11) disappears, extension spring (9) resets, and movable contact spring (9) moving contact (8) just contacts with the fixed contact (7) of normally closed terminal (6).Thereby realize that switch closure and conducting state on electric switch.

Claims

1, a kind of water proof type sensitive switch, comprise normally closed terminal (6), Chang Kaiduan (5), support (3), pedestal (4), cover plate (1), fixed contact (7), moving contact (8), extension spring (2), movable contact spring (9), button (11), it is characterized in that: also comprise sealing ring (10), described sealing ring (10) is the bowl type of bowl end hollow out, and sealing ring (10) the bowl end and the recessed edge of button (11) place closely cooperate.

2, a kind of water proof type sensitive switch as claimed in claim 1, it is characterized in that: sealing ring (10) bowl edge contacts the periphery place with cover plate (1), pedestal (4) covers the periphery place with cover plate (1), and normally closed terminal (6), Chang Kaiduan (5), support (3) run through pedestal (4) locates all to fill out the envelope marine glue.

3, a kind of water proof type sensitive switch as claimed in claim 1 is characterized in that: described sealing ring (10) is an elastomeric material.

4, a kind of water proof type sensitive switch as claimed in claim 1 is characterized in that: described fixed contact (7), moving contact (8) are silver alloy.

5, a kind of water proof type sensitive switch as claimed in claim 1 is characterized in that: described extension spring (2) is anticorrosive, the endurance of tool, resistant to elevated temperatures metal wire rod.