Patent ID: 9732737
Date: 2017-08-15
CPC Classifications: F03G,F16M,H02N

Claim:
1. A drive unit comprising: a base member having an operation base having one or more operation recesses in a front surface thereof; a movable member that is disposed to be opposite to the base member and has an operation projection to be inserted into the operation recess in an opposed surface thereof; and a string or strip of shape memory alloy member that is disposed between the base member and the movable member and shrinks by heat generated by passing an electric current, wherein the drive unit is configured such that the movable member is moved in a direction away from the base member in conjunction with the shrinkage of the shape memory alloy member by the passage of the electric current, a fixed portion is provided in a middle of the base member in a core axial direction of the shape memory alloy member in order to fix the middle on a support member and is provided with a step-like attachment engagement portion that is disposed in a middle side surface of the base member in the core axial direction of the shape memory alloy member and projected in a direction intersecting the core axial direction of the shape memory alloy member, wherein the base member includes a base member main body made of an insulating resin, a concave engagement recess that is open in the direction intersecting the core axial direction of the shape memory alloy member is provided in a middle side surface of the base member main body, and an inner bottom edge of the engagement recess constitutes the attachment engagement portion.