Actuator and table device
AssigneeSeiko Instruments Inc.
InventorShigehiro Arai
Life of this patent
Estimating the term…
Abstract
In order to achieve miniaturization and high accuracy in movement, an actuator comprises a stationary shaft extending in a predetermined direction, a needle movable along the stationary shaft, one of the stationary shaft and the needle having a permanent magnet, and the other of the stationary shaft and the needle comprising a linear motor having a coil, a guide rail extending in parallel to the stationary shaft and interposing the needle inside to guide the same, and a pair of support means interposed between the guide rail and the needle to movably support the needle, points of action of the pair of support means and an axis of the stationary shaft being consistent with each other.
Claims32
An actuator comprising:
- a linear motor comprising a stationary shaft and a needle movable along a longitudinal direction of the stationary shaft, one of the stationary shaft and the needle having a magnet and the other of the stationary shaft and the needle having a coil;
- a guide rail extending in parallel to the stationary shaft and interposing the needle inside to guide the same;
- and
- support means interposed between the guide rail and the needle and disposed in coaxial relation with an axis of the stationary shaft for movably supporting the needle relative to the guide rail;
- wherein when a current is supplied to the coil, a magnetic flux acts between the magnet and the coil to generate a driving force by which the needle is moved along the longitudinal direction while being movably supported by the support means and guided by the guide rail.
An actuator comprising:
- a linear motor comprising a stationary shaft and a needle movable along a longitudinal direction of the stationary shaft, one of the stationary shaft and the needle having a magnet and the other of the stationary shaft and the needle having a coil;
- a guide rail extending in parallel to the stationary shaft and interposing the needle inside to guide the same;
- and
- support means interposed between the guide rail and the needle for movably supporting the needle relative to the guide rail, at least two contact points between the support means and the needle being equally spaced-apart from an axis of the stationary shaft;
- wherein when a current is supplied to the coil, a magnetic flux acts between the magnet and the coil to generate a driving force by which the needle is moved along the longitudinal direction while being movably supported by the support means and guided by the guide rail.
An actuator comprising:
- a linear motor comprising a stationary shaft and a needle movable along a longitudinal direction of the stationary shaft, one of the stationary shaft and the needle having a magnet and the other of the stationary shaft and the needle having a coil;
- a guide rail extending in parallel to the stationary shaft and guiding the needle;
- and
- support means interposed between the guide rail and the needle for movably supporting the needle relative to the guide rail, at least two contact points between the support means and the needle being equally spaced-apart from an axis of the stationary shaft;
- wherein when a current is supplied to the coil, a magnetic flux acts between the magnet and the coil to generate a driving force by which the needle is moved along the longitudinal direction while being movably supported by the support means and guided by the guide rail.
An actuator comprising:
- a linear motor comprising a stationary shaft and a needle movable along a longitudinal direction of the stationary shaft, one of the stationary shaft and the needle having a magnet and the other of the stationary shaft and the needle having a coil;
- a guide rail that guides the needle along the longitudinal direction of the stationary shaft;
- and
- support means for movably supporting the needle relative to the guide rail;
- wherein when a current is supplied to the coil, a magnetic flux acts between the magnet and the coil to generate a driving force by which the needle is moved along the longitudinal direction while being movably supported by the support means and guided by the guide rail.
Dependencies are inferred from the claim text.