| 摘要 |
PURPOSE:To prevent erroneous operation, by intertwisting one light guide passage and one rod made of an elastomer. CONSTITUTION:A guide passage 1 and a rod 2 made of an elastomer are intertwisted and light advances in the direction shown by an arrow. When light having definite intensity is allowed to be incident on the guide passage 1, since the guide passage receives bending deformation and light is leaked out of the guide passage corresponding to said deformation, the intensity of emitting light becomes low. By this constitution, by applying small load at any position in the longitudinal direction, the function as a sensor can be developed and erroneous operation can be prevented.
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