Abstract: It is an object of the present invention to remove an applied force generated at the time of combining connectors due to a close tolerance of components which compose a mounting mechanism of a unit, which is based on the SCA method. A tray carrying a magnetic disk unit has a guide pin having a thick body portion and a thin body portion. A back panel, which is under a floating condition, so as to be movable up and down, left and right and backward and forward, is mounted on a frame. The back panel has a guide hole to guide the guide pin. When the tray is being inserted to the frame carrying the magnetic disk unit, the thick body of the guide pin is guided by the guide hole and position setting of the connector of the magnetic disk unit and the connector of the back panel is performed. Furthermore, when the tray is being inserted to the end of the frame, the thin body of the guide pin passes the guide hole and the connectors are connected.

Abstract: For providing a connector device in which the combinational precision of a guide mechanism and a lock mechanism can be easily increased and it can be easily confirmed whether or not the engagement of the connector device and lock is effectively performed, a guide pin is provided to a male connector and a guide bore is provided to a female connector and they guide an engaging operation between the male connector and the female connector. The guide bore is provided therein with a retractable lock piece with a permanent magnet. An electromagnet provided at the lower portion of the lock piece is polar exchanged in response to a signal input from outside so that the lock piece is engaged with the guide pin or is disengaged from the guide pin to perform a lock/unlock operation. The position of the lock piece is detected to recognize the engaging or locking state of the connectors.

Abstract: In a printing apparatus comprising a first conveyance system (C1) for conveying a first printing medium (3), a second conveyance system (C2) for conveying a second printing medium (6), and a print head (1) for conducting printing on the first or second printing medium on a platen (2), a detector (13) detects presence or absence of the first printing medium on the first conveyance system (C1), and a platen drive controller (18) causes rotation of the platen during the printing or conveyance of the second printing medium if the first printing medium is found present in the first conveyance system (C1). The platen drive controller may conduct the control over the rotation also on the basis of the state of conveyance of the second printing medium in order to ensure rotation of the platen from time to time while avoiding excessive rotation to reduce noises and power consumption.

Abstract: A plurality of paper supply mechanisms are spaced in a vertical direction. A printing section is provided on the discharge side of the paper supply mechanisms for vertical movement. A driving mechanism positions the printing section to one of the paper supply mechanisms.