| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical reed switch which is simple in configuration and can be downsized. SOLUTION: When a magnet 9 ascends, the magnetic force of the magnet acts on magnetic reeds 6 and 7, contact point parts 6a and 7a of the magnetic reeds, which are originally separated from each other, are made contact to each other, thus an shielding pin 7b of the magnetic reed 7 shields the optical path formed between the incident/emitting part 3 of an optical fiber 2 and a reflection body 4 which is provided facing to the optical fiber, the optical emitted from the incident/emitting part and reflected on the reflection body does not return to the incident/emitting part. On the other hand, when the magnet 9 descends and the magnetic force does not act on the magnetic reeds 6 and 7, the contact point parts 6a and 7a of the magnetic reeds separate from each other, the shielding pin 7b of the magnetic reed 7 retracts from the optical path, thus the optical reflected on the reflection body is made incident on the incident/emitting part. COPYRIGHT: (C)2007,JPO&INPIT
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