Vibration type actuator and manufacturing method thereof

Abstract

The invention provides a vibration type actuator with incapability of reducing a propelling force and capabilities of being stably supported and miniaturized and a manufacturing method thereof. An actuator main body (1) is kept inside a supporting component (10) consisting of a group of retainers (11) and a cover body (12) in a hollow state. Adhesives (21, 22) are coated in a clearance between the inner surface of each retainer (11) and the actuator main body (1) and a clearance between the inner surface of the cover body (12) and the actuator main body (1) by adopting a distributor and the like. The adhesives (21, 22) are silicone rubber and the like and exert elasticity after being hardened. The actuator main body (1) can be elastically supported inside the supporting component (10) by an adhesive force without pressure, so the actuator main body (1) can be stably supported without reducing the propelling force. In addition, the support is performed by coating the adhesives (21, 22) in the clearances so as to realize the small vibration type actuator.

Description

technical field [0001] The present invention relates to a vibration-type actuator in which a driving element such as a piezoelectric element vibrates an actuator to move a moving body, and a method for manufacturing the same. Background technique [0002] The following Patent Document 1 discloses a vibration-type actuator including an actuator and a mover that are fitted to each other via a screw portion, and a piezoelectric element that excites the actuator. [0003] When the actuator of the piezoelectric element is repeatedly subjected to two-axis and phase-difference bending motion (or bending vibration, the same applies hereinafter), the motion of the actuator is a rotational motion, which is transmitted to the mover to move the mover. The mover is fitted with the driver via the threaded portion, so the mover moves in the axial direction of the thread under the action of its own rotational force. In such a vibration-type actuator, the mover can rotate at a relatively lo...

AI Technical Summary

Problems solved by technology

[0010] However, although the position of the support vibrator is appropriate, there is such a problem that when the applied force is too small, the support position will deviate in the longitudinal direction for each bending motion, resulting in unstable bending motion, resulting in vibration. The advance and retreat movement force (propulsion force) of the device is reduced

[0011] In addition, on the contrary, there is such a problem that if the applied force is too large, the movement of the vibrator is constrained, and efficient bending movement cannot be performed, resulting in a decrease in forward and backward movement force (propulsion force).

[0012] Furthermore, there is also such a problem that it is necessary to provide dedicated members for supporting vibrators such as ring-shaped support members, and a space for accommodating these members is required, so it is difficult to miniaturize, and if it is miniaturized, it is difficult to manufacture.

Images