Vibration wave motor, optical device, and electronic device

JP2025167961APending Publication Date: 2025-11-07CANON KK
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Patent Information

Application Number
JP2024073008
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-26
Publication Date
2025-11-07

AI Technical Summary

Technical Problem

Existing oscillatory wave motors using single-plate piezoelectric elements face increased manufacturing costs due to the need for side electrodes and complex internal structures, which require additional processes like printing and chamfering, and the use of precious metals for electrodes.

Method used

A vibration wave motor design that eliminates side electrodes by electrically connecting drive and ground electrodes through a flexible printed circuit board, using a shaft and upper nut to establish ground conduction without additional parts, maintaining a simple internal structure and reducing manufacturing complexity.

Benefits of technology

The design achieves a compact and cost-effective oscillatory wave motor with simplified manufacturing processes, eliminating the need for side electrodes and reducing motor size while maintaining electrical connectivity.

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Abstract

To provide a small-size vibration wave motor with a low manufacturing cost.SOLUTION: A vibration wave motor includes: first and second elastic bodies 1 and 2; a vibration body 15 having piezoelectric elements 3-1 and 3-2 disposed between the first and second elastic bodies 1 and 2, and a terminal board 4 electrically connected to the piezoelectric elements 3-1 and 3-2; a moving body 16 that moves relative to the vibration body 15 due to the vibration of the vibration body 15; and a shaft 5 supporting the vibration body 16. The shaft 5 is supported by a fixed portion 13 by an upper nut 14, the terminal board has a first connection portion and a second connection portion, a first connection portion 4a of the terminal board 4 is electrically connected to drive electrodes disposed on the piezoelectric elements 3-1 and 3-2, and the second connection portion 4b of the terminal board 4 is electrically connected to the ground electrode disposed on the piezoelectric elements 3-1 and 3-2 by coming into contact with at least one of the shaft 5, the fixing portion 13, and the upper nut 14.SELECTED DRAWING: Figure 2
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Citation Information

Patent Citations

  • JP1975074674A

  • Rodlike ultrasonic vibrator and rodlike ultrasonic motor

    JP1995115783A