A magnetic tape drive device includes coils wound about a stator core secured to a base board; a rotor case containing a drive magnet secured to the inner surface thereof, the drive magnet being disposed facing the stator core; and a drive member for transmitting the rotation of rotor case to a roller, the drive member positioned on an outer peripheral surface of the rotor case.

A pinch roller assembly used in a video cassette recorder, employs a plastic journal bearing or a metallic sliding bearing in order to pivotally carry a sleeve about a supporting shaft, the bearings retained around a lower portion of a small diameter section and on an upper end of a large diameter section of the supporting shaft and a cushion member secured around an external surface of the bearings so as to enable an external rubber contact to tilt with respect to the supporting shaft.

There is disclosed a printer having a thermal print head and a cooperable platen roll. The platen roll is driven to advance a web of record medium and an ink ribbon into cooperation with the print head. The printer can use an ink ribbon cartridge. The printer has a compact arrangement for the record medium supply roll, the ink ribbon cartridge, the printing mechanism, the drive mechanism, the keyboard, and the cutting mechanism for cutting tags from the web. The ink ribbon cartridge has shiftable guide rolls cooperating with pins on the printer to assure accurate alignment of the ribbon on the print head.

A plastic chassis is provided in which a shaft is fixed to the chassis even if a snap fitting integrally formed with the chassis is broken. An arm member having a claw portion is formed around a through hole formed in the chassis. A protrusion having a top surface located a predetermined distance lower than a top surface of the arm member is formed around the through hole. When the shaft is inserted into the through hole, the claw portion engages with an annular groove formed near the end of the shaft so as to fix the shaft to the chassis. When the arm member is broken, a slit washer is engaged with the annular groove so as to fix the shaft to the chassis. The slit washer is disposed on the top surface of the protrusion.

The present invention provides a magnetic tape system which experiences a reduced, if not eliminated, amount of slippage between the drive roller of the tape drive system and the driven roller of the magnetic tape cartridge. The present invention employs a hard plastic driven roller having a slightly enlarged diameter portion to which an elastomeric, rubber-like material is bonded. The elastomeric material has the form of an annular sleeve or ring which is coextensive with a slightly enlarged diameter portion of the driven roller to provide a reduced slippage annular contact surface for contacting a portion of a rubber outer sleeve positioned on the capstan, or drive roller, of a conventional magnetic tape drive.