ACTUATOR, DRIVE DEVICE, AND HAND DEVICE

摘要

A fluid pressure-type actuator that is operated at pressure lower than a conventional level and in which response is enhanced. A tubular expansion body (15) whose one end (15a) is closed and whose the other open end (15b) has a hose (14) inserted in its opening is covered with a tubular coating body (12). The other end (12b) of the coating body (12) is bound by a binder (13b) and fastened by a fastener (19) to an added member (11) extending along the coating body (12). One end (12a) of the coating body (12) is bound by a binder (13a) with an engagement member (16), to which a wire (18) is fastened, received in the one end (12a), thereby a closed end (12c) is formed. When fluid is not supplied, one end (15a) of the expansion body (15) is separated from the closed end (12c), and when the fluid is supplied, the expansion body (15) expands first in the longitudinal direction to cause the one end (15a) to be in contact with the closed end (12c) and then expands in the radial direction.