Abstract: A print medium conveyance device 40 has a tractor 44, conveyance roller 55, and clutch mechanism 83. The tractor 44 sequentially engages engagement holes formed in a line in the medium and conveys the print medium in a specific conveyance direction X. The conveyance roller 55 is disposed downstream from the tractor 44 in the conveyance direction X, and has a friction layer 59 containing an inorganic particle dispersion formed on the surface. the clutch mechanism 83 is between the conveyance motor 72 and tractor 44, and interrupts transfer of drive power from the conveyance motor 72 to the tractor 44 at least in part under a specific condition. The print medium can therefore be conveyed with high precision while damage to the print medium by excessive tension can be prevented.

Abstract: A print medium conveyance device 40 has a tractor 44, conveyance roller 55, and clutch mechanism 83. The tractor 44 sequentially engages engagement holes formed in a line in the medium and conveys the print medium in a specific conveyance direction X. The conveyance roller 55 is disposed downstream from the tractor 44 in the conveyance direction X, and has a friction layer 59 containing an inorganic particle dispersion formed on the surface. the clutch mechanism 83 is between the conveyance motor 72 and tractor 44, and interrupts transfer of drive power from the conveyance motor 72 to the tractor 44 at least in part under a specific condition. The print medium can therefore be conveyed with high precision while damage to the print medium by excessive tension can be prevented.

Abstract: The massage mechanism includes inner treatment elements, outer treatment elements and a driving device that drives the treatment elements. A distance between the inner treatment elements and the outer treatment elements is changed by the driving device. A first supporting shaft supports the inner and the outer treatment elements and is rotated about an axial center by the driving device. The first supporting shaft includes inner inclined shafts that support the inner treatment elements via an arm and outer inclined shafts that support the outer treatment elements via the arm. The massage mechanism is configured to be movable from a backrest part to a footrest part via a seat part.

Abstract: A chair includes: a seat body (7) an upper surface of which is a seat surface for a user to be seated thereon; a frame (8) supporting the seat body (7) in a manner to permit the seat body (7) to move between a center position and swing positions to which the seat body (7) is swung from the center position; and a driving portion for forcibly moving the seat body (7). The height of the seat surface determined when the seat body (7) is at the center position is lower than the height of the seat surface determined when the seat body is at the swing position.