| 摘要 |
PURPOSE:To facilitate the easy production of a signal detector and to avoid such a case where the necessary operations are forgotton, by performing the connection/separation between a protecting member and the signal detector in response to an action of a power supply switching button. CONSTITUTION:When a power supply switching button 35 is pushed, a power supply switch 33 is closed via a coupling member 37. In this case, a protecting member 31 connected with the member 37 is turned round a support shaft 32 toward an arrow head (a). Thus an interlocking part 31a is separated from a detector 4 and the detector can move along guide shafts 5 and 6. The button 35 pushed and kept as it is. When the button 35 is pushed again, this button 35 is pushed back to its original position. Thus the switch 33 is opened. The member 31 is turned in the direction opposite to the head (a) in response to the actions of the button 35. Then the part 31a interlocks the detector 4 for protection of the detector 4. |
