Summary of the invention
The purpose of this utility model provides a kind of simple in structure, construction of switch with water-proof function.
For achieving the above object, the technical solution adopted in the utility model is: a kind of construction of switch, its case panel is provided with the aperture that the contact for push-button switch appears, it is characterized in that: place, described aperture is provided with elasticity and touches the film cover, constitutes between the edge of the tactile film cover of elasticity and the hole wall in aperture or the aperture end face to be sealed and matched.
Owing to adopt such scheme, by touching the switch work that film cover actuation button switch can be realized push-button switch by compression elasticity, simultaneously, constitute between the edge of the tactile film cover of elasticity and the hole wall in aperture or the aperture end face and be sealed and matched, effectively stop moisture to enter the internal cavity of case panel, realize water-proof function.
Embodiment
A kind of construction of switch, its case panel 10 is provided with the aperture 11 that the contact 21 for push-button switch 20 appears, 11 places, described aperture are provided with elasticity and touch film cover 30, constitute between the edge of the tactile film cover 30 of elasticity and the hole wall in aperture 11 or the aperture end face and be sealed and matched, the slit that communicates between the hole wall in aperture 11 and the enclosure interior cavity is sealed fully like this, stop moisture to enter effectively, realize the water-proof function of construction of switch.When concrete assembling is used, by touching the switch work that film cover 30 actuation button switches 20 can be realized push-button switch 20 by compression elasticity, the utility model is simple in structure, install and use in the position of driving cabin display terminal and can play good waterproof effect, the job security height.
As further preferred version: described elasticity is touched film cover 30 for having the cap-like structure of flange 31, the cover chamber of the tactile film cover 30 of elasticity is located at contact 21 positions of push-button switch 20 identically, touches the sensitivity that film cover 30 can guarantee switch motion by compression elasticity like this.The crown that elasticity is touched film cover 30 is positioned at 11 places, aperture, its crown is concordant with the outer face in aperture 11 or all can a little more than the outer face in aperture 11, elasticity is touched the flange 31 of film cover 30 and edge, the inner end formation in aperture 11 is sealed and matched, elasticity is touched the hole wall in film cover 30 and aperture 11 like this, the edge, inner end in aperture 11 is sealed and matched, and waterproof effect is better.Preferably, described elasticity is touched film cover 30 and is made by silicon rubber, selects for use silicon rubber not only to meet the elasticity requirement, compression molding easily, and good seal performance.
Further, be provided with pillar 40 in the internal cavity of described case panel 10, the caliber of pillar 40 is greater than the aperture in aperture 11, the flange 31 that described elasticity is touched film cover 30 between the pipe end 41 of the edge, inner end in aperture 11 and pillar 40 and formation compress and be sealed and matched, as shown in Figure 1, the side plate face of flange 31 and the plate face of housing are fitted, the edge that another lateral plates is resisted against the pipe end 41 of pillar 40 realizes being sealed and matched, stop moisture to enter the internal cavity of case panel 10 effectively, and the pipe end 41 of pillar 40 is pressed on the edge of flange 31, provide enough displacements in the time of can guaranteeing flange 31 distortion like this, so that the switch over travel of push-button switch 20 is achieved.
Further, the outer cover that described elasticity is touched film cover 30 is provided with pressure cap 50, and the aperture 11 on pressure cap 50 and the case panel 10 constitutes movingly, can realize the switch motion of push-button switch by pressing pressure cap 50 like this.Described pressure cap 50 can be the press-key structure that is used for pressing push-button switch 20 in the prior art, preferably as Fig. 1,51 cap-like structure turns edge having shown in 2, turning edge of pressure cap 50 51 is positioned at elasticity and touches the flange 31 of film cover 30 and counterbore step 111 places of 11 inner ends, aperture, and 31 the edge of turning edge cooperates for arc-shaped transition with counterbore step 111, so can further strengthen the waterproof effect of switch, can there be certain clearance in cooperating between the pressure cap of setting up 50 and the hole wall in aperture 11, can reduce to press the stroke action of easier realization push-button switch 20 like this, simultaneously, the material hardness of described pressure cap 50 needs moderate, as silicon rubber, comfortable feel and possess globality when pressing, the steady displacement of pressure cap 50 meetings realizes push action reliably when having guaranteed to press pressure cap 50.
Further, the flange 31 of the tactile film cover 30 of described elasticity is provided with first and second projectioies 311,312 of ring-type near the side plate face of pressure caps 50, described first and second projectioies 311,312 circumferentially arranging continuously along flange 31, in conjunction with as shown in Figure 1, 2, first projection 311 51 presses mutually with turning edge of pressure cap 50, when pressing pressure cap 50 like this, the pressure that its 51 pairs of elasticity that turn edge are touched the flange 31 of film cover 30 mainly concentrates on first projection 311, so can reduce to press the dynamics of pressure cap 50, improve the sensitivity of construction of switch, for the user provides convenience.Second projection 312 is positioned at the edge of flange 31, can also between first and second projectioies 311,312, add the 3rd projection 313, the second and the 3rd projection 312,313 is set makes the flange 31 plate face concave-convex surface near pressure caps 50, the housing that matches with its structure is set again, can further improve sealing effectiveness, stop moisture to enter the internal cavity of case panel 10.