CN201289808Y - Waterproof light-touch switch - Google Patents

Abstract

The utility model discloses a water-proof touch switch which belongs to the technical field of the electric switching control manufacture. The utility model comprises a base, a cover plate, a spring plate and a key; the key is fixed on the base through the cover plate and plays the role with the spring plate in the base, wherein, a water-proof membrane and a dust-proof membrane are arranged between the spring plate and the key and positioned on the contact end surface between the base and the cover plate; the water-proof membrane tightly clings to the top surface of the dust-proof membrane; and the area that water-proof membrane tightly clings to the dust-proof membrane is bigger than a cover plate hole where the key is located. An inner key is arranged on the top surface of the spring plate, and the top end of the inner key is adjacent to the dust-proof membrane. Since the dust-proof membrane is arranged above the touch point, the utility model effectively prevents the fluid from entering the base, thereby serving the purpose of water prevention, and avoiding the generation of easy contact point corrosion as well as aging and other circumstances. The utility model has the advantages of reasonable structure, high safety performance and the like.

Description

The water proof type touch-switch

Technical field

The utility model discloses a kind of water proof type touch-switch, belongs to appliance switch control class manufacturing technology field.

Background technology

Switch is a kind of electronic device of control circuit on/off, and can be divided into according to the starting method of switch: rotary switch, tumbler switch, push-button switch etc. are several.Wherein, key switch since its easily Starting mode and light and handy outward appearance to be that the family expenses small electric apparatus uses maximum a kind of.Along with progressing greatly of growth in the living standard and electronic technology, household electrical appliance more and more enter into daily life, and safety problem becomes the focus that people pay close attention to naturally.People make electrical appliance often will touch switch often, thus switch whether waterproof be key point wherein.

Existing a kind of switch as shown in Figure 5, be provided with central contact and side contact in the pedestal (d), pedestal (d) below is provided with respectively the terminal that joins with contact, shell fragment (c) is covered in the contact end face on the pedestal, the edge of shell fragment (c) contacts with the side contact, the end face of shell fragment (c) is connected to button (a), by cover plate (b) be fixed on the pedestal (d).During use, when the user applied the pressure pressing keys of being out of shape greater than shell fragment, the bottom central part position of shell fragment contacted with central contact, and central contact and side contact are able to through shell fragment the terminal of upper and lower both sides to be produced and electrically conduct; After the pressure that the user will apply button was cancelled, metal clips can resilience and separate with central contact, makes the terminal of both sides and central contact be off-state, is so had the effect of switch.So, this switch base is not provided with hermetically-sealed construction, and therefore, liquid can be flowed in the pedestal by the slit of the slit between cover plate and the pedestal applying and button and cover plate mating holes, cause the short circuit between the contact, thereby cause the loose contact of switch even can't connect and operate as normal.

So the inventor with the repeatedly improvement of existing construction of switch, creates the novel switched structure that has good waterproof effect a second month in a season through research for many years finally.

Summary of the invention

At the deficiency of existing construction of switch technology, the utility model provides a kind of water proof type touch-switch of rational in infrastructure, good water-proof effect.

The utility model is achieved through the following technical solutions:

The utility model comprises pedestal, cover plate, shell fragment and button, be provided with central contact and side contact in the pedestal, the bottom of pedestal is provided with the terminal that is connected with central contact and side contact respectively, shell fragment covers the end face be arranged at central contact and side contact on the pedestal, button is fixed on the pedestal by cover plate, and have an effect with the pedestal inner shrapnel, wherein: be provided with waterproof membrane and dustproof film between described shell fragment and the button, this waterproof membrane and dustproof film are in the end face that contacts between pedestal and the cover plate.

Described waterproof membrane is close to the end face of dustproof film, and waterproof membrane is close to the area of dustproof film greater than the residing cover board hole of button.

Described shell fragment end face is provided with button in, and button top end face is in abutting connection with dustproof film in this.

Switching function does not have damage the utility model soaks 240H in 10cm and temperature are 60 ℃ water after; Under high humidity environment or having when using under the environment of dewfall possibility,, after installing, switch do apply to cover terminal for preventing leakage current between terminal.

The utlity model has following useful effect:

1, the utility model stops liquid to enter in the pedestal because a waterproof membrane is set above the contact effectively, plays the waterproof purpose, has avoided situations such as contact is perishable and aging to take place;

2, the use of the dustproof film of the utility model has reduced the absorption to dust around the switch, has prolonged life-span of switch with the water resistance acting in conjunction;

3, the utlity model has rational in infrastructure, security performance advantages of higher.

Description of drawings

Fig. 1 is the utility model cutaway view;

Fig. 2 is an end view of the present utility model;

Fig. 3 is the utility model vertical view;

Fig. 4 is circuit reduction figure of the present utility model;

Fig. 5 is existing switch cutaway view.

Wherein, 1, button, 2, cover plate, 3, waterproof membrane, 4, dustproof film, 5, interior button, 6, shell fragment, 7, pedestal, 8, terminal;

Among Fig. 5, a, button, b, cover plate, c, shell fragment, d, pedestal.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

Embodiment 1: structure as depicted in figs. 1 and 2, the utility model comprises pedestal 7, cover plate 2, shell fragment 6 and button 1, be provided with central contact and side contact in the pedestal 7, the bottom of pedestal 7 is provided with the terminal 8 that is connected with central contact and side contact respectively, shell fragment 6 covers the end face that is arranged at central contact and side contact on the pedestal 7, button 1 is fixed on the pedestal 7 by cover plate 2, and have an effect with pedestal 7 inner shrapnels 6, be provided with waterproof membrane 3 and dustproof film 4 between shell fragment 6 and button, this waterproof membrane 3 and dustproof film 4 are in the end face that contacts between pedestal 7 and the cover plate 2.

Waterproof membrane is close to the end face of dustproof film, and the area that waterproof membrane is close to dustproof film is provided with button 5 in greater than residing cover board hole of button and shell fragment 6 with dustproof film 4 end faces, and button 5 top end faces are in abutting connection with dustproof film in this.

As shown in Figure 3, Figure 4,1. 2. terminal under the button effect with 3. 4. terminal on/off, thereby control the circuit that this switch connects.

The utility model rated power is 20mA, DC12V Max; The anti-resistance of contact is 100M Ω Max; Insulation resistance 100M Ω Min; Action force 250 ± 50gf; Stroke is 0.3 ± 0.1mm; Life-span is 100000 cycler min, and switching function does not have damage this switch soaks 240H in 10cm and temperature are 60 ℃ water after; Under high humidity environment or having when using under the environment of dewfall possibility,, after installing, switch do apply to cover terminal for preventing leakage current between terminal.

The above record only for utilizing the embodiment of this origination techniques content, anyly is familiar with modification, the variation that this skill person uses this creation to do to do, and all belongs to the claim of this creation opinion, and is not limited to those disclosed embodiments.

Claims (3)

1, a kind of water proof type touch-switch, comprise pedestal, cover plate, shell fragment and button, be provided with central contact and side contact in the pedestal, the bottom of pedestal is provided with the terminal that is connected with central contact and side contact respectively, shell fragment covers the end face be arranged at central contact and side contact on the pedestal, button is fixed on the pedestal by cover plate, and have an effect with the pedestal inner shrapnel, it is characterized in that: be provided with waterproof membrane and dustproof film between described shell fragment and the button, this waterproof membrane and dustproof film are in the end face that contacts between pedestal and the cover plate.

2, water proof type touch-switch according to claim 1 is characterized in that: described waterproof membrane is close to the end face of dustproof film, and waterproof membrane is close to the area of dustproof film greater than the residing cover board hole of button.

3, water proof type touch-switch according to claim 1 and 2 is characterized in that: described shell fragment end face is provided with button in, and button top end face is in abutting connection with dustproof film in this.

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