Light quantity adjusting device and portable terminal

The light amount adjustment device corrects the drive lever's movement to maintain precision in light adjustment despite shifts in the diaphragm member's position during anti-vibration operations, addressing inaccuracies caused by perpendicular movement.

JP2024175108AActive Publication Date: 2024-12-17CANON DENSHI KK
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Patent Information

Application Number
JP2024162418
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-09-19
Publication Date
2024-12-17
Estimated Expiration
2040-07-15

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Abstract

To provide a light quantity adjusting device capable of precisely adjusting a light quantity even if a diaphragm member moves in a direction orthogonal to a light axis.SOLUTION: A light quantity adjusting device includes: a base member that has a light passage opening; a lens holding member 2 that holds a lens through which light passes and can move in a direction orthogonal to a light axis of light from a reference position,; diaphragm blade 9 that is mounted to the lens holding member 2, is moved forward / backward into / from the light passage opening, and forms a diaphragm opening; a drive lever 5 that is mounted to the lens holding member 2, holds a magnet, and transmits drive force for driving the diaphragm blade; and a drive source that has a coil 7 disposed in the base member 1 while opposing the magnet 6, and generates drive force, wherein a movement amount of the drive lever 5 is corrected according to a movement amount from the reference position in the lens holding member 2 when moving the drive lever 5 by energizing the coil 7.SELECTED DRAWING: Figure 9
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Citation Information

Patent Citations

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    CN209570784U

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