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US 12,287,562 B2Granted
Driving mechanism
AssigneeTDK Taiwan Corp.
InventorsTso-Hsiang Wu, Yung-Yun Chen
Life of this patent
Estimating the term…
Abstract
A driving mechanism for moving an optical unit is provided, including a fixed part, a movable part, and a driving unit. The movable part is connected to the optical unit and the fixed part, and the movable part is movable relative to the fixed part. The driving unit is configured to drive the movable part and the optical unit to move relative to the fixed part.
Claims17
A driving mechanism for moving an optical unit, comprising:
- a fixed part;
- a movable part, movably connected to the optical unit and the fixed part;
- and
- a driving unit, configured to impel the movable part and the optical unit relative to the fixed part, wherein the driving unit comprises an SMA element that has a first length when the movable part is in a first position relative to the fixed part, and when a current signal is applied to the SMA element, the SMA element shrinks from a first length to a second length and impels the movable part from the first position to a second position relative to the fixed part;
- a slider, movably disposed on the movable part and connected to the SMA element, wherein the fixed part forms a longitudinal guiding structure, the slider contacts a first end of the guiding structure when the movable part is in the first position relative to the fixed part, and when the slider is impelled by the SMA element along the guiding structure from the first end to a second end of the guiding structure, the movable part is pushed by the slider from the first position to the second position;
- a housing, wherein the movable part and the fixed part are received in the housing;
- and
- a smooth element, disposed on an inner surface of the housing and facing the slider.
5 more elements
A driving mechanism for moving an optical unit, comprising:
- a fixed part;
- a movable part, movably connected to the optical unit and the fixed part;
- a driving unit, configured to impel the movable part and the optical unit relative to the fixed part, wherein the driving unit comprises an SMA element that has a first length when the movable part is in a first position relative to the fixed part, and when a current signal is applied to the SMA element, the SMA element shrinks from a first length to a second length and impels the movable part from the first position to a second position relative to the fixed part;
- a slider, movably disposed on the movable part and connected to the SMA element, wherein the fixed part forms a longitudinal guiding structure, the slider contacts a first end of the guiding structure when the movable part is in the first position relative to the fixed part, and when the slider is impelled by the SMA element along the guiding structure from the first end to a second end of the guiding structure, the movable part is pushed by the slider from the first position to the second position;
- and
- a bottom plate, forming a longitudinal cavity, wherein the fixed part is located between the movable part and the bottom plate, and the slider extends through the movable part and the fixed part to the cavity.
3 more elements
A driving mechanism for moving an optical unit, comprising:
- a fixed part;
- a movable part, movably connected to the optical unit and the fixed part;
- a driving unit, configured to impel the movable part and the optical unit relative to the fixed part, wherein the driving unit comprises an SMA element that has a first length when the movable part is in a first position relative to the fixed part, and when a current signal is applied to the SMA element, the SMA element shrinks from a first length to a second length and impels the movable part from the first position to a second position relative to the fixed part;
- a slider, movably disposed on the movable part and connected to the SMA element, wherein the fixed part forms a longitudinal guiding structure, the slider contacts a first end of the guiding structure when the movable part is in the first position relative to the fixed part, and when the slider is impelled by the SMA element along the guiding structure from the first end to a second end of the guiding structure, the movable part is pushed by the slider from the first position to the second position;
- and
- a magnetic element, disposed on the fixed part, wherein the SMA element is located between the magnetic element and the slider.
3 more elements
Dependencies are inferred from the claim text.