Drive unit, camera module, and camera mounting device
The drive device stabilizes the contact state between vibrating parts in ultrasonic motors by using a magnetically biased movable part, addressing frictional resistance issues and ensuring smooth operation.
JP2026105261APending Publication Date: 2026-06-26MITSUMI ELECTRIC CO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- MITSUMI ELECTRIC CO LTD
- Filing Date
- 2024-12-16
- Publication Date
- 2026-06-26
AI Technical Summary
Technical Problem
Existing ultrasonic motors used in camera modules experience unstable contact states between the vibrating parts, leading to increased frictional resistance and hindered smooth movement of movable parts.
Method used
A drive device with a movable part made of magnetic material, an ultrasonic motor comprising a laminate of stacked piezoelectric elements, and a drive unit with a contact portion driven by a magnetically biased movable portion to stabilize the contact state.
Benefits of technology
Stabilizes the contact state between the contact and movable parts, ensuring smooth operation by reducing frictional resistance and enhancing the movement of movable parts.
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Smart Images
Figure 2026105261000001_ABST
Abstract
The present invention provides a drive device, a camera module, and a camera mounting device that can stabilize the contact state between the contact part and the movable part. [Solution] The drive device includes a movable part made of a magnetic material, an ultrasonic motor including a laminate in which a plurality of plate-shaped elements including a piezoelectric element are stacked, a drive unit that has a contact part that contacts the laminate and the movable part and drives the movable part in a predetermined direction, and a magnet part that is positioned other than between the laminate and the movable part and is magnetized to bias the movable part toward the contact part.
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