Thermal printing mechanism having a printer chassis, a thermal printhead, a motor for rotating a platen roller with a motor spur gear, a platen roller with a platen roller gear mounted on it, the platen roller gear being a worm wheel able to engage with a worm screw. The motor is mounted so that its gear axis is substantially parallel to the thermal printhead surface which is in contact with the platen roller, and perpendicular to the platen roller shaft. The thermal printing mechanism additionally includes a gear shaft mounted substantially parallel to the motor gear axis, the gear shaft having at one end a spur gear able to engage with the motor spur gear, and at the other end a worm screw, able to engage with the platen roller gear.

A printer has a carriage being movable between a first end and a second end of a reciprocating path; and a driving force transmitting path selecting mechanism provided at the second end of the reciprocating path. The selecting mechanism has: a common driving force outputting member; a plurality of force receiving members; a selecting member; and a position retainer for keeping the position of the selecting member. The selecting member connects the force outputting member to one of the plurality of force receiving members, and moves in association with the carriage when the carriage moves in a vicinity of the second end in a first direction extending from the first end to the second end. The position retainer keeps the position of the selecting member when the carriage moves in a second direction extending from the second end to the first end. The force receiving member connected to the force outputting member via the selecting member is selected in accordance with a movement of the carriage along the reciprocating path.

A printer has a carriage being movable between a first end and a second end of a reciprocating path; and a driving force transmitting path selecting mechanism provided at the second end of the reciprocating path. The selecting mechanism has: a common driving force outputting member; a plurality of force receiving members; a selecting member; and a position retainer for keeping the position of the selecting member. The selecting member connects the force outputting member to one of the plurality of force receiving members, and moves in association with the carriage when the carriage moves in a vicinity of the second end in a first direction extending from the first end to the second end. The position retainer keeps the position of the selecting member when the carriage moves in a second direction extending from the second end to the first end. The force receiving member connected to the force outputting member via the selecting member is selected in accordance with a movement of the carriage along the reciprocating path.

An inkjet recording device is described in which maintenance is performed by a maintenance unit upon a recording head. The maintenance unit is located on a base unit. The base unit includes a wall portion supporting a plurality of gear shafts protruding in a width direction from the wall portion.

An assembly comprises at least first and second transmission links. Each transmission link controls movement of a respective element coupled to a first side of the transmission link, under control of a common drive source coupled to a second side of the transmission link. A synchronizing unit is interposed between the first side and the second side of each transmission link, to synchronize movement of the respective elements by the common drive source.

An apparatus includes: a delivering-side gear train that transmits motive power to a delivering-side drive shaft; an winding-side gear train that transmits motive power to an winding-side drive shaft; a second clutch mechanism that connects the drive motor and the delivering-side gear train to each other in accordance with reverse rotation of the drive motor and disconnects the drive motor and the delivering-side gear train from each other in accordance with forward rotation of the drive motor; and a first clutch mechanism that is provided upstream of the second clutch mechanism, connects the drive motor and the winding-side gear train to each other in accordance with the forward rotation of the drive motor, and disconnects the drive motor and the winding-side gear train from each other in accordance with the reverse rotation of the drive motor.

An apparatus includes: a delivering-side gear train that transmits motive power to a delivering-side drive shaft; an winding-side gear train that transmits motive power to an winding-side drive shaft; a second clutch mechanism that connects the drive motor and the delivering-side gear train to each other in accordance with reverse rotation of the drive motor and disconnects the drive motor and the delivering-side gear train from each other in accordance with forward rotation of the drive motor; and a first clutch mechanism that is provided upstream of the second clutch mechanism, connects the drive motor and the winding-side gear train to each other in accordance with the forward rotation of the drive motor, and disconnects the drive motor and the winding-side gear train from each other in accordance with the reverse rotation of the drive motor.

The disclosure discloses a printer including a load circuit, a controller, a power receiving terminal, a first switching circuit, and a second switching circuit. The controller is configured to control voltage supply to the load circuit, and is connected to an input part. The power receiving terminal is configured to be connected to a power feeding terminal of an external power source device. The first switching circuit includes a first switch element configured to switch between conduction and interruption in accordance with a first control signal input from the controller, and is connected between the power receiving terminal and the input part. The second switching circuit includes a second switch element configured to switch between conduction and interruption in accordance with a second control signal input from the controller, and is connected between the battery storage part and the input part.

A printing apparatus includes: a transport roller configured to transport a medium through a transport path; a printing unit configured to perform printing on the medium transported by the transport roller through the transport path; an intermediate roller configured to transport again, to the transport path, the medium transported through an inversion path in a reverse direction to a transport direction of the medium to invert a front surface and a back surface of the medium, the inversion path including a branching point where the inversion path branches from the transport path at an upstream side of the transport roller in the transport direction, the inversion path merging with the transport path again at an upstream side of the branching point in the transport direction; a device disposed in the transport path and between the transport roller and the intermediate roller; a first driving device configured to drive the transport roller; and a second driving device configured to drive the intermediate roller, in which the intermediate roller includes an electromagnetic clutch mechanism.

A printing apparatus includes: a transport roller configured to transport a medium through a transport path; a printing unit configured to perform printing on the medium transported by the transport roller through the transport path; an intermediate roller configured to transport again, to the transport path, the medium transported through an inversion path in a reverse direction to a transport direction of the medium to invert a front surface and a back surface of the medium, the inversion path including a branching point where the inversion path branches from the transport path at an upstream side of the transport roller in the transport direction, the inversion path merging with the transport path again at an upstream side of the branching point in the transport direction; a device disposed in the transport path and between the transport roller and the intermediate roller; a first driving device configured to drive the transport roller; and a second driving device configured to drive the intermediate roller, in which the intermediate roller includes an electromagnetic clutch mechanism.