Driving member, linear driving device, camera device, and electronic device
A driving member, a linear driving device using the driving member, a camera device and an electronic device are provided. The driving member ( 10 ) includes a deformable thin plate ( 16 ) having a flexible thin plate ( 12 ) capable of expanding and contracting itself under the applied voltage and an elastic thin plate ( 14 ) having at least one side thereof rigidly fixed to the flexible thin plate ( 12 ) and a driving shaft ( 30 ) having its one axial end rigidly fixed to the deformable thin plate ( 16 ) and being capable of undergoing displacements that are operatively associated with the deformation of the deformable thin plate ( 16 ), wherein the driving shaft ( 30 ) has the lateral side portion ( 32 ) of the one axial end thereof rigidly fixed to the corresponding inner side portion of a through hole formed on the deformable thin plate ( 16 ).
1. A driving member which comprises:
a deformable thin plate including a flexible thin plate capable of expanding and contracting itself under the applied voltage and an elastic thin plate having at least one side thereof rigidly fixed to said flexible thin plate; and
a driving shaft having its one axial end rigidly fixed to said deformable thin plate and being capable of undergoing displacements which are operatively associated with the deformation of the deformable thin plate,
wherein said driving shaft having said one axial end whose lateral side portion is rigidly fixed to an inner side portion of a through hole formed on said elastic thin plate.
2. The driving member as defined in claim 1 , wherein the lateral side portion of said one end of said driving shaft is diametrically smaller than the lateral side portion located in the center portion of said driving shaft.
3. The driving member as defined in claim 1 , wherein said driving shaft has one end thereof that is not protruding through the surface of the side opposite the side on which said driving shaft is rigidly fixed to said deformable thin plate.
4. A linear driving device that includes the driving member as defined in claim 1 and a movable member frictionally coupled with said driving member so that said movable member can be moved in the axial direction thereof as said driving shaft is displaced in the axial direction thereof.
5. The linear driving device as defined in claim 4 , wherein said movable member is a lens support having a lens fixed thereto for focusing the light received from an object.
6. A camera device that includes a lens for focusing the light received from an object, the linear driving device as defined in claim 5 , and an imaging element for sensing the light focused by said lens.
7. An electronic device that includes the camera device as defined in claim 6 .
8. A driving member which comprises:
a deformable thin plate including a flexible thin plate capable of expanding and contracting itself under the applied voltage and an elastic thin plate having at least one side thereof rigidly fixed to said flexible thin plate; and
a driving shaft having its one axial end rigidly fixed to said deformable thin plate and being capable of undergoing displacements which are operatively associated with the deformation of the deformable thin plate;
wherein said driving shaft having said one axial end whose lateral side portion is rigidly fixed to an inner side portion of a through hole formed on said deformable thin plate;
wherein said through hole includes a first through hole formed on said elastic thin plate and a second through hole formed on said flexible thin plate, said first and second through holes communicating with each other and said first through hole being diametrically larger than said second through hole.
9. A driving member which comprises:
a deformable thin plate including a flexible thin plate capable of expanding and contracting itself under the applied voltage and an elastic thin plate having at least one side thereof rigidly fixed to said flexible thin plate;
a driving shaft having its one axial end rigidly fixed to said deformable thin plate and being capable of undergoing displacements which are operatively associated with the deformation of the deformable thin plate;
wherein said driving shaft having said one axial end whose lateral side portion is rigidly fixed to an inner side portion of a through hole formed on said deformable thin plate; and
an intervening thin plate interposed between the inner side portion of said through hole and the corresponding lateral side portion of said one end of said driving shaft.