| 摘要 |
FIELD: machine building.SUBSTANCE: present invention provides the chamber given below. First contact pin on the side of the chamber is the pin corresponding to detection of a signal changing caused by coupling an accessory to the chamber. Second contact pin on the side of the chamber is the pin corresponding to the power supply for providing connection to the accessory coupled with the chamber. Third contact pin on the side of the chamber is the pin corresponding to the motive force supply to the drive of the accessory to the chamber.EFFECT: first, second and third contact pins on the side of the chamber are arranged in such a way, that when the fixer on the side of the chamber is shifted from the first state to the second state the third contact pin on the side of the chamber is in contact with the first and the second contact surfaces on the side of the accessory, the second contact pin on the side of the chamber is in contact with the first contact surface on the side of the accessory, and the first contact pin on the side of the chamber does not contact with the second and the third contact surfaces on the side of the accessory.20 cl, 1 tbl, 19 dwg |
