Patent ID: 11931309
Assignee: SUNCALL CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. The actuator unit according to claim 1, wherein:
the lower connecting body includes a lower rotational shaft provided on the lower frame to extend inward in a user width direction, a lower fastening member supported by the lower rotational shaft to be rotatable around an axis of the lower rotational shaft and a lower receiving member supported by the lower frame in a position spaced apart in a user front-back direction from the lower rotational shaft at a distance that enables the lower leg frame to be interposed between the lower fastening member and the lower rotational shaft;
the lower fastening member has a bearing part supported by the lower rotational shaft and a cam part extending radially outward from the bearing part;
the cam part is configured such that a radial distance between an outer circumferential surface of the cam part and the axis of the lower rotational shaft is increased toward a first side around the axis of the lower rotational shaft; and
in a state where the lower fastening member is positioned in a released position around the lower rotational shaft, relatively moving the lower frame and the lower leg frame toward each other with respect to the user width direction enables the lower leg frame to be positioned in a space between the lower fastening member and the lower receiving member, and in a state where the lower leg frame is positioned in the space, relatively moving the lower frame and the lower leg frame away from each other with respect to the user width direction enables the lower leg frame to be retreated from the space, while, in the state where the lower leg frame is positioned in the space, axially rotating the lower fastening member from the released position around the lower rotational shaft to a second side opposite to the first side causes the cam part to hold the lower leg frame in cooperation with the lower receiving member with respect to the user front-back direction, and thereby the lower frame is connected to the lower leg frame.