Light pen
First Claim
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1. A light pen, adapted to allow a switch structure thereof to be more durable and dependable and have a shorter stroke, comprising:
- a pen shell, being tubular;
a luminescence element, movably combined with said pen shell and provided with first and second pins;
a first magnet, movably installed in said pen shell;
a second magnet, fixed in said pen shell and positioned above said first magnet;
wherein, said pen shell is used for accepting a battery;
two adjacent sides of said first and said second magnets has different magnetism, said first and said second magnets are always separated, and approach each other once an external force is exerted thereon;
said first pin and said second pin of the luminescence element ordinarily respectively do not turn on a circuit constituted by a first terminal and a second terminal of the battery to allow said luminescence element not to radiate;
when said first and said second magnets are near, said first pin and said second pin of said luminescence element respectively turn on said circuit constituted by said first terminal and said second terminal of said battery to allow said luminescence element to radiate.
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Abstract
First and second magnets of a light pen according to the present invention are used for replacing a conventional spring to be a switch structure of the light pen. Whereby, the elastic fatigue problem is not yielded, the switch structure is enabled to be more durable and dependable and can be used as a switch structure for a light pen whose stroke between two electric contact points from a separation state to a contact state is shorter.
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Citations
14 Claims
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1. A light pen, adapted to allow a switch structure thereof to be more durable and dependable and have a shorter stroke, comprising:
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a pen shell, being tubular; a luminescence element, movably combined with said pen shell and provided with first and second pins; a first magnet, movably installed in said pen shell; a second magnet, fixed in said pen shell and positioned above said first magnet; wherein, said pen shell is used for accepting a battery; two adjacent sides of said first and said second magnets has different magnetism, said first and said second magnets are always separated, and approach each other once an external force is exerted thereon;
said first pin and said second pin of the luminescence element ordinarily respectively do not turn on a circuit constituted by a first terminal and a second terminal of the battery to allow said luminescence element not to radiate;
when said first and said second magnets are near, said first pin and said second pin of said luminescence element respectively turn on said circuit constituted by said first terminal and said second terminal of said battery to allow said luminescence element to radiate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification