| 摘要 |
PURPOSE:To eliminate the generation of a spark completely and to facilitate the replacement of an optical fiber line by providing a photoelectric transducing part internally and an optical fiber connector coupled with the photoelectric transducing part through the optical fiber externally. CONSTITUTION:One-side end parts of optical fibers 52 and 53 are coupled with a light emitting body and a photodetecting body, and the other-side terminals are led out of a box 40 and connected to an optical fiber 54. An optical fiber line 56 connecting a connector 55 and an optical switch 70 together consists of optical fibers 57 and 58 and a shield body 59. The optical switch 70 and line 56 are coupled together by an optical connector 60. When the button 70 of the optical switch 70 is pressed, light is cut off and a signal indicating that the button is operated is sent to a line 81 to control a controller 80. If the line 56 is broken, the optical connecors 54 and 55 are only disengaged and if the optical switch 70 is broken, the optical switch 70 is only disengaged from the optical connector 60 for replacement, so the replacement is extremely easy. |
