JP2015116020A5 - Motor and device with motor - Google Patents

Description

However, in the ultrasonic motor disclosed in Patent Document 1, since the two contact portions are arranged in the relative movement direction, the size in the relative movement direction tends to increase. The present invention, this problem has been made to solve, and to provide that the can makes the chromophore at the distal end over data, etc. to reduce the size of the relative movement direction.

Motors of the present invention is the electrode area which is vertically and horizontally divided into two parts in one surface forming a piezoelectric element on the other surface of the one electrode regions are formed, it is fixed to the vibrating elastic member wherein the piezoelectric element vibration of the secondary bending vibration mode and the first-order torsional vibration mode is excited by a predetermined phase shift, twisting the loop position of the secondary bending vibration mode of the primary and and vibrating the elastic member having two contact portions provided at the intersection of the node positions of the vibration mode, have a contact surface between the two contact portions, it moves relative to the vibrating elastic member by pre Kifu dynamic And a driven part.

According to the present invention, it is possible to provide two alignment direction of the contact portion and the relative movement and can be made to the orthogonal direction, makes the chromophore at the distal end over data can reduce the size of the relative movement direction by the arrangement.

In the present invention, a piezoelectric element fixed to the vibrating elastic vibration of the secondary bending vibration mode and the first-order torsional vibration mode is excited with a predetermined phase shift, the bending vibration mode antinode position and the Two contact portions of the vibrating elastic body are provided at or near the intersection with the node position of the torsional vibration mode. The driven portion has a contact surface between the two contact portions, it moves relative to the vibrating elastic member by pre Kifu movement. The secondary bending vibration mode is a vibration mode having three nodes and two antinodes, and the primary torsional vibration mode is a vibration mode having one node and two antinodes.

Claims (10)

A piezoelectric element in which an electrode region that is divided into two in each direction is formed on one surface and one electrode region is formed on the other surface;
By the piezoelectric element fixed to the vibrating elastic vibration of the secondary bending vibration mode and the first-order torsional vibration mode is excited with a predetermined phase shift, and loop position of the secondary bending vibration mode A vibrating elastic body having two contact portions provided at an intersection with the node position of the primary torsional vibration mode;
Has a contact surface with the two contact portions, and the driven portion for relative movement before the Kifu movement relative to the vibrating elastic member,
Features and to makes the chromophore at the distal end over data that has a. The piezoelectric element is a direction of relative movement between the two areas arranged in a direction perpendicular, motors according to claim 1, characterized in that the direction of polarization is different. Among the electrode regions divided into two in the vertical and horizontal directions, the electrode regions adjacent to each other in the direction orthogonal to the relative movement direction are applied with the same phase AC voltage, and the electrode regions adjacent to the relative movement direction are out of phase. motor according to claim 1 in which an AC voltage, characterized in that it is applied. Motor according to claim 3 in one electrode regions which are not the divided, characterized in that connected to the ground potential. When the length in the relative movement direction of the region where the vibration elastic body and the piezoelectric element are fixed is L1, and the length in the direction orthogonal to the relative movement direction is L2, L1 and L2 have the following relationship. motor according to claim 1, characterized in that.
L1 × 3.0 <L2 <L1 × 8.0 The vibrating elastic member includes a fixed portion for fixing the vibrating elastic member, before a arm portion for the Kifu dynamic hardly propagated to the fixed portion, the arm portion, before Kifu dynamic motor according to claim 1, characterized in that provided on the extension of the nodal positions. The vibrating elastic member includes a fixed portion for fixing the vibrating elastic member, before a arm portion for the Kifu dynamic hardly propagated to the fixed portion, the arm portion, twisting of the primary motor according to claim 6, characterized in that provided on the extension of the nodal position of Jiri vibration mode. The vibrating elastic member includes a fixed portion for fixing the vibrating elastic member, before a arm portion for the Kifu dynamic hardly propagated to the fixed portion, the arm portion is bent in the secondary motor according to claim 6, characterized in that provided on the extension of the nodal position of the vibration mode. The vibrating elastic member includes a fixed portion for fixing the vibrating elastic member, before a arm portion for the Kifu dynamic hardly propagated to the fixed portion, the arm portion, twisting of the primary motor according to claim 6, characterized in that the butt vibration mode is provided on the extension of the nodal positions of the secondary bending vibration mode. A lens barrel lens holding frame, characterized in that it is driven motors described by driving force of including actuators to any one of claims 1 to 9.