VARIABLE CAPACITOR
First Claim
1. A variable capacitor comprising:
- a substrate having a top surface;
an electrode pattern formed on said top surface of said substrate;
at least one conductive contact formed on said top surface of said substrate and spaced apart from said electrode pattern;
a dielectric sheet disposed on said top surface of said substrate and covering said electrode pattern;
a resilient conductive supporting seat mounted on said dielectric sheet, said conductive supporting seat having a central portion spaced apart from said dielectric sheet, and a contact portion corresponding to said electrode pattern, said contact portion extending downward from said central portion toward said electrode pattern and abutting against said dielectric sheet;
an insulating operating cap supported by said conductive supporting seat and disposed over said central portion of said conductive supporting seat;
a conductive cover body mounted on said substrate, and covering and electrically contacting said conductive supporting seat, said cover body being connected electrically to said conductive contact, and permitting said operating cap to extend outward; and
a biasing member disposed between said conductive supporting seat and said dielectric sheet for biasing said central portion to move away from said substrate;
wherein, when said operating cap is depressed, said operating cap forces said contact portion of said conductive supporting seat to deform such that a surface area of said deformed contact portion that contacts said dielectric sheet is increased, thereby changing the capacitance between said conductive supporting seat and said electrode pattern.
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Accused Products
Abstract
A variable capacitor includes: a dielectric sheet disposed on a substrate and covering an electrode pattern on the substrate; a resilient conductive supporting seat mounted on the dielectric sheet for supporting an insulating operating cap on a central portion thereof; a conductive cover body covering the conductive supporting seat and permitting the operating cap to extend outward; and a biasing member for biasing the central portion of the conductive supporting seat to move away from the substrate. The cover body is connected electrically to the conductive supporting seat and a conductive contact on the substrate. When the operating cap is depressed, the operating cap forces a contact portion of the conductive supporting seat to deform such that a surface area of the deformed contact portion that contacts the dielectric sheet is increased, thereby changing the capacitance between the conductive supporting seat and the electrode pattern.
4 Citations
8 Claims
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1. A variable capacitor comprising:
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a substrate having a top surface; an electrode pattern formed on said top surface of said substrate; at least one conductive contact formed on said top surface of said substrate and spaced apart from said electrode pattern; a dielectric sheet disposed on said top surface of said substrate and covering said electrode pattern; a resilient conductive supporting seat mounted on said dielectric sheet, said conductive supporting seat having a central portion spaced apart from said dielectric sheet, and a contact portion corresponding to said electrode pattern, said contact portion extending downward from said central portion toward said electrode pattern and abutting against said dielectric sheet; an insulating operating cap supported by said conductive supporting seat and disposed over said central portion of said conductive supporting seat; a conductive cover body mounted on said substrate, and covering and electrically contacting said conductive supporting seat, said cover body being connected electrically to said conductive contact, and permitting said operating cap to extend outward; and a biasing member disposed between said conductive supporting seat and said dielectric sheet for biasing said central portion to move away from said substrate; wherein, when said operating cap is depressed, said operating cap forces said contact portion of said conductive supporting seat to deform such that a surface area of said deformed contact portion that contacts said dielectric sheet is increased, thereby changing the capacitance between said conductive supporting seat and said electrode pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification