CN204927128U

CN204927128U - Dustproof keyboard switch

Info

Publication number: CN204927128U
Application number: CN201520738718.0U
Authority: CN
Inventors: 吴福喜
Original assignee: Dongguan Kaihua Electronics Co Ltd
Current assignee: Dongguan Kaihua Electronics Co Ltd
Priority date: 2015-09-23
Filing date: 2015-09-23
Publication date: 2015-12-30
Anticipated expiration: 2025-09-23

Abstract

The utility model relates to a keyboard switch field, concretely relates to dustproof keyboard switch, including key cap, base, static contact, movable contact spring, upper cover and button, outside the upper cover was located to the key cap cover, the upper cover lock was on the base, and static contact and movable contact spring all set up on the base, button one end can be installed on the base movablely from top to bottom, and the other end is worn to establish upper cover, key cap are equipped with towards one side of upper cover and are used for holding the cavity that the one end of upper cover was worn to establish by the button, and the cavity is equipped with the dust cover all around, and the upper cover is equipped with a through -hole that is used for the button to wear to establish, and the dust cover is in when pressing down the state with the through -hole phase -match so that when the button, and the dust cover seals up gap between cavity and the through -hole is in order to prevent that the dust from getting into. The utility model discloses an if one with through -hole assorted dust cover, be in when pressing down the state when the button, the sealed gap of living between cavity and the through -hole avoids the switch malfunctioning, convenient to use, and long service life in order to prevent the dust entering.

Description

Dustproof keyboard switch

Technical field

The utility model relates to keyboard switch art, refers in particular to a kind of dustproof keyboard switch.

Background technology

Keyboard switch, as the term suggests be a kind ofly apply and be installed on the switch on keyboard, the primary structure of this switch includes pedestal, upper cover, static contact, movable contact spring and button, this upper cover and pedestal enclose formation containing cavity, this static contact, movable contact spring and button are arranged in this containing cavity, and one end of this button is exposed outside containing cavity, by pressing operational and controlled key button, make button up and down, and then act on movable contact spring by button, movable contact spring is contacted with static contact connect or depart to separate, realize the opening and closing of keyboard.

The keyboard switch of prior art, when initial condition, keycap is located at upper cover surrounding completely, therebetween gap is not had, now dust can not enter key inside, but when key press on earth time, because the surrounding of button and upper cover exists gap, dust can enter in these gaps, accumulate over a long period, dust can enter into movable contact spring, static contact and circuit board, pollutes these electronic devices and components, cause malfunctioning switch, make keyboard switch use inconvenient and useful life is shorter.

Utility model content

For solving the problem, the utility model provides a kind of can prevent dust from entering, protect electronic devices and components, the easy to use and dustproof keyboard switch of long service life.

The technical scheme that the utility model adopts is: dustproof keyboard switch, comprise keycap, base, static contact, movable contact spring, upper cover, for controlling the movable and button that contacts with static contact of movable contact spring; Described keycap covers at upper cover outside, and described upper cover is fastened on base, and described static contact and movable contact spring are all arranged on base; Described button one end can be installed on base up and downly, the other end wears described upper cover, described keycap is provided with towards the side of upper cover the cavity wearing one end of upper cover for holding button, the shape size of described cavity and button matches, described cavity is provided with dust cover all around, described upper cover central authorities are provided with a through hole worn for one end of button, described dust cover and described through hole match to make when described button is in pressed state, and the gap that described dust cover seals between described cavity and through hole enters to prevent dust.

Being improved to further technique scheme, one end that described button wears upper cover is cross, and described cavity is cross, and four ends of described cavity and four limits of described dust cover abut against.

Being improved to further technique scheme, the degree of depth of described dust cover is greater than the degree of depth of described cavity.

Being improved to further technique scheme, described keycap, cavity and dust cover are one-body molded.

The beneficial effects of the utility model are:

1, by enclosing a dust cover outside the cavity for holding button, and the shape of dust cover and through hole and size match, when button is in pressed state, dust cover seals up gap between cavity and through hole and enters in the movable contact spring of keyboard switch internal, static contact and circuit board to prevent dust, pollute electronic devices and components, prevent keyboard switch malfunctioning, easy to use, and be conducive to the useful life of prolonging keyboard switch.

2, four ends of cavity and four limits of dust cover abut against, and the degree of depth of dust cover is greater than the degree of depth of cavity.Prevent dust from entering keyboard switch internal from the gap between dust cover and cavity, be conducive to further preventing dust, the useful life of prolonging keyboard switch.

3, keycap and on cavity and dust cover one-body molded.A punch die can complete the processing of dustproof keyboard, make the utility model make simple, cost is low.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of the utility model initial condition;

Fig. 3 is the cutaway view of the utility model initial condition;

Fig. 4 is the structural representation of the utility model pressed state;

Fig. 5 is the cutaway view of the utility model pressed state;

Fig. 6 is the structural representation of keycap of the present utility model;

Fig. 7 is the structural representation at another visual angle of keycap of the present utility model;

Fig. 8 is the A-A cutaway view in Fig. 7;

Fig. 9 is the B-B cutaway view in Fig. 7.

Embodiment

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

As shown in Figure 1, be structural representation of the present utility model.

Dustproof keyboard switch 100, comprise keycap 110, base 120, static contact 130, movable contact spring 140, upper cover 150, for controlling the movable and button 160 that contacts with static contact 130 of movable contact spring 140.

As shown in Fig. 6-Fig. 9, be respectively the structural representation of keycap of the present utility model, A-A cutaway view and B-B cutaway view.

It is outside that keycap 110 covers at upper cover 150, and upper cover 150 is fastened on base 120, and static contact 130 and movable contact spring 140 are all arranged on base 120, button 160 one end can be installed on base 120 up and downly, the other end wears upper cover 150, in the present embodiment, one end that button 160 wears upper cover 150 is cross, keycap 110 is provided with the cross-shaped cavity 111 for holding cross button 160 towards the side of upper cover 150, cross-shaped cavity 111 is provided with dust cover 112 all around, upper cover 150 is provided with a through hole 151 worn for button 160, dust cover 112 and through hole 151 match to make when button 160 is in pressed state, the gap that dust cover 112 seals between cross-shaped cavity 111 and through hole 151 enters to prevent dust.

By enclosing a dust cover 112 outside the cross-shaped cavity 111 for holding button 160, and the shape of dust cover 112 and through hole 151 and size match, when button 160 is in pressed state, dust cover 112 seals up gap between cross-shaped cavity 111 and through hole 151 and enters in the movable contact spring 140 of keyboard switch 100 inside, static contact 130 and circuit board to prevent dust, pollute electronic devices and components, prevent keyboard switch 100 malfunctioning, easy to use, and be conducive to the useful life of prolonging keyboard switch 100.

Four ends of cross-shaped cavity 111 and four limits of dust cover 112 abut against, and the degree of depth of dust cover 112 is greater than the degree of depth of cavity 111.Prevent dust from entering keyboard switch 100 from the gap between dust cover 112 and cross-shaped cavity 111 inner, be conducive to further preventing dust, the useful life of prolonging keyboard switch 100.

Keycap 110 and on cavity 111 and dust cover 112 one-body molded.A punch die can complete the processing of dustproof keyboard, make the utility model make simple, cost is low.

Operation principle of the present utility model is:

As shown in Figures 2 and 3, structural representation and the cutaway view of the utility model initial condition is respectively.

During initial condition, the cross end of button 160 is positioned at above the through hole 151 of upper cover 150, forms hermetically-sealed construction between button 160 and upper cover 150, and because keycap 110 is according to being located at above button 160, it is inner that extraneous dust can not enter keyboard switch 100.

As shown in Figure 4 and Figure 5, structural representation and the cutaway view of the utility model pressed state is respectively.

When External Force Acting is in button 160, cross end declines gradually, cavity 111 also declines gradually until the cross end being set in button 160 is completely outside, simultaneously, dust cover 112 is fastened in the gap that formed between the through hole 151 of cavity 111 and upper cover 150, to seal this gap, prevents dust from entering into keyboard switch 100 by this gap inner, avoid the electronic devices and components such as movable contact spring 140, static contact 130 and circuit board to be polluted, ensure the normal use of keyboard switch 100.

The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims

1. dustproof keyboard switch, comprise keycap, base, static contact, movable contact spring, upper cover, for controlling the movable and button that contacts with static contact of movable contact spring; Described keycap covers at upper cover outside, and described upper cover is fastened on base, and described static contact and movable contact spring are all arranged on base; Described button one end can be installed on base up and downly, the other end wears described upper cover, described keycap is provided with towards the side of upper cover the cavity wearing one end of upper cover for holding button, the shape size of described cavity and button matches, it is characterized in that: described cavity is provided with dust cover all around, described upper cover central authorities are provided with a through hole worn for one end of button, described dust cover and described through hole match to make when described button is in pressed state, and the gap that described dust cover seals between described cavity and through hole enters to prevent dust.

2. dustproof keyboard switch according to claim 1, is characterized in that: one end that described button wears upper cover is cross, and described cavity is cross, and four ends of described cavity and four limits of described dust cover abut against.

3. dustproof keyboard switch according to claim 2, is characterized in that: the degree of depth of described dust cover is greater than the degree of depth of described cavity.

4. dustproof keyboard switch according to claim 3, is characterized in that: described keycap, cavity and dust cover are one-body molded.