Device for magnifying displacement of piezoelectric element or the like and method of producing same

A device for magnifying displacement of a piezoelectric element adapted to be displaced be application of voltage thereto, comprising:

• a frame extending substantially parallel to a direction of displacement of said piezoelectric element, said piezoelectric element being mounted on said frame;
• a movable member fixed to one end of said piezoelectric element with respect to said direction of displacement;
• a first mount surfaced formed on said frame and extending substantially parallel to said direction of displacement;
• a second mount surface formed on a surface of said movable member and extending substantially parallel to said direction of displacement, and second mount surface facing said first mount surface;
• a first leaf spring mounted at a first end portion thereof on said first mount surface and extending substantially parallel to said direction of displacement;
• a second leaf spring mounted at a first end portion thereof on said second mount surface and extending substantially parallel to said direction of displacement;
• a rolling member fixed to second end portions of said first and second leaf springs, wherein when said piezoelectric element is displaced, said second leaf spring is displaced along said first leaf spring through said movable member to roll said rolling member;
• and
• an elastically deformable connecting member extending along said piezoelectric element on an opposite side of said frame with respect to said movable member and connecting said movable member with a base portion of said frame, wherein when said piezoelectric element is displaced, said movable member is displaced substantially parallel to the direction of displacement against the elasticity of said connecting member to curve said second leaf spring relative to said first leaf spring and thereby roll said rolling member.

A device for magnifying displacement of a piezoelectric element adapted to be displaced by application of voltage thereto, comprising:

• a frame extending substantially parallel to a direction of displacement of said piezoelectric element, said piezoelectric element being mounted on said frame;
• a movable member fixed to one end of said piezoelectric element with respect to said direction of displacement;
• a first mount surface formed on said frame and extending substantially parallel to said direction of displacement;
• a second mount surface formed on a surface of said movable member and extending substantially parallel to said direction of displacement, said second mount surface facing said first mount surface;
• a first leaf spring mounted at a first end portion thereof on said first mount surface and extending substantially parallel to said direction of displacement;
• a second leaf spring mounted at a first end portion thereof on said second mount surface and extending substantially parallel to said direction of displacement;
• a rolling member fixed to second end portions of said first and second leaf springs, wherein when said piezoelectric element is displaced, said second leaf spring is displaced along said first leaf spring through said movable member to roll said rolling member;
• and
• a quadri-hinged parallel link mechanism provided between said frame and said movable member for maintaining parallelism of said movable member to the direction of displacement of said piezoelectric element.