PURPOSE: To obtain a sure switching operation, by connecting the light from a light emitting means to a light receiving means by movement of the plunger consisting of materials sucked by the magnet arranged in the cylinder.
CONSTITUTION: This unit consists of plunger 17 consisting of materials sucked to fixing magnets 19a and 19b arranged in cylinder 16, mirror face 18 fitted to one end of this plunger 17, optical fiber 1 which has one end arranged oppositely to mirror face 18, and the light emitting means and the light receiving means connected to optical fiber 1. Moving magnet 20 to move plunger 17 in cylinder 16 is fixed to plunger 16. In this constitution, the light from the light emitting means to the light receiving means is connected through optical fiber 1 by movement of plunger 16, and this light is broken by return of plunger 16 to the original position.
OKAMOTO KUNINORI
KANBE YOSHIAKI
