Why do membrane switches need to be designed with raised keys? What are the advantages? Want to know? Now, let's get to know it with jingcaiming

The key press is pressing the key area on the mask layer with a drum press. This method is based on the natural characteristics and concave convex characteristics of membrane switch materials, and has strict temperature and pressure requirements. The basic form is as follows:

(1) Raised border: used when the edge of switch is raised.

(2) Flat convex: the whole switch is higher than the surface of the panel.

(3) Ball convex: used for processing spherical keys.

(4) Box line convex + ball convex: not commonly used.

Advantages of the membrane switch designed as a convex key:

(1) The decorative effect of membrane switch appearance is improved.

(2) The operator is sensitive to touch.

(3) The range of bond body is given accurately.

(4) Improve the recognition speed.

Factors to be considered when designing the membrane switch as a convex key:

(1) Special mould machining is needed.

(2) The limit temperature of the raised polyester is 50 ℃.

(3) The raised height shall not exceed 1.5 times of the material thickness.

(4) The plane bulge shall be at least 3mm or 5mm away from the edge.

(5) The distance between the key raised by the frame line and the edge shall be at least 5mm.

(6) overexert the assembly to reduce mechanical life (for polycarbonate mask, mechanical life should be operated no less than 100 thousand times).