Drive unit and mounting structure thereof

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, and
• 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.