Magnifying key switch
AssigneeSilitek Corporation
InventorJames Lin
Life of this patent
Estimating the term…
Abstract
A key switch includes a rubber key body mounted within a key switch hole on a key pad device above a circuit board thereof, and a key cap fastened to the rubber key body at the top and depressed to move the rubber key body downward in triggering a contact on the circuit board, wherein the key cap is made from a plastic convex lens having a convex top wall and a plain bottom wall, the plain bottom wall having a light-blocking area and a light-penetrable area, the light-penetrable area being shown in the form of a pattern; the rubber key body is molded from a vulcanized rubber sealed to the plain bottom wall of the key cap through a heat sealing process. Three layers of ink are disposed between the key body and the key cap.
Claims13
A key switch for mounting within a key switch hole on a key pad device above a circuit board having a contact, the key switch comprising:
- a rubber key body having a top surface;
- a key cap fastened to said rubber key body at the top surface, the key cap being depressed to move said rubber key body downward in triggering the contact on the circuit board, wherein said key cap comprises a plastic convex lens having a convex top wall and a plain bottom wall;
- said plain bottom wall having a light-blocking area and a light-penetrable area, said light-penetrable area being in the form of a pattern;
- wherein said light-blocking area includes at least one layer of ink;
- and
- wherein said rubber key body is molded from a vulcanized rubber having a melting point between 110.degree. C. to 120.degree. C. and said top surface is sealed to said plain bottom wall of said key cap through a heat sealing process.
Dependencies are inferred from the claim text.