Driving module and electronic apparatus provided with the same

Abstract

Disclosed are a driving module that can reduce fears of breakage and failures due to impact force caused by dropping or the like and can be miniaturized, and an electronic apparatus provided with the driving module. The driving module includes: a lens frame ( 4 ); a module frame ( 5 ) housing the lens frame ( 4 ) in an inside thereof; an upper plate spring ( 6 ); and an SMA wire ( 10 ) for driving the lens frame ( 4 ) along a predetermined direction against a biasing force of the upper plate spring ( 6 ). The lens frame ( 4 ) is provided with, in a cylinder end portion or a column end portion of the lens frame ( 4 ) in a circumferential direction, caulking portions ( 16 ) that sandwich the upper plate spring ( 6 ) with the lens frame ( 4 ) so as to fix the upper plate spring ( 6 ) to the lens frame ( 4 ), and the module frame ( 5 ) is provided with, in a cylinder end portion of the module frame ( 5 ) in the circumferential direction, caulking portions ( 17 ) that sandwich the upper plate spring ( 6 ) with the module frame ( 5 ) so as to fix the upper plate spring ( 6 ) to the module frame ( 5 ). The caulking portions ( 16 ) and the caulking portions ( 17 ) are placed while angular positions in the circumferential direction with respect to a center axis of the lens frame ( 4 ) are shifted.

1 . A driving module, comprising:
 a cylindrical or columnar body to be driven;   a cylindrical support housing the body to be drive in an inside thereof;   a plate spring member that holds elastically the body to be driven with respect to the support so that the body to be driven is movable in a predetermined direction; and   driving means for driving the body to be driven in the predetermined direction against a biasing force of the plate spring member, wherein:   the body to be driven is provided with, in a cylinder end portion or a column end portion of the body to be driven in a circumferential direction, a plurality of first plate spring fixing portions that sandwich the plate spring member with the body to be driven so as to fix the plate spring member to the body to be driven;   the support is provided with, in a cylinder end portion of the support in the circumferential direction, a plurality of second plate spring fixing portions that sandwich the plate spring member with the support so as to fix the plate spring member to the support; and   the first plate spring fixing portions and the second plate spring fixing portions are placed while angular positions in the circumferential direction with respect to a center axis of the body to be driven are shifted on a plane orthogonal to the center axis.   
     
     
         2 . A driving module according to  claim 1 , wherein a cylinder outer circumferential portion of the support is formed in a polygonal shape, and each of the second plate spring fixing portions is provided in a corner of a polygon of the support. 
     
     
         3 . A driving module according to  claim 2 , wherein:
 the driving means comprises a shape memory alloy wire that is stretched across the cylinder outer circumferential portion of the support and drives the body to be driven against the biasing force of the plate spring member;   the body to be driven comprises a protrusion that locks the shape memory alloy wire;   the support is provided with a protrusion insertion portion that allows the protrusion to be inserted in the corner of the polygon in a radial direction and to move in the predetermined direction; and   each of the second plate spring fixing portions in the corner in which the protrusion insertion portion is formed is placed adjacent to the protrusion insertion portion in the circumferential direction.   
     
     
         4 .- 8 . (canceled)