Displacement sensor and electronic musical instrument
AssigneeYamaha Corporation
InventorsJun Ishii, Michiko Tanoue
Life of this patent
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Abstract
A displacement sensor includes: a detectable portion: including a first coil; and being disposed on a movable member that is displaceable in response to an operation; and a signal generator: including a second coil that opposes the first coil; and being configured to generate a detection signal based on a relative position between the first coil and the second coil. A first distance from a first end of the first coil to a second end of the first coil in a first direction differs from a second distance from a third end of the first coil to a fourth end of the first coil in a second direction perpendicular to the first direction when the first coil is viewed in plan view.
Claims2
A displacement sensor comprising:
- a detectable portion:
- including a first coil;
- and
- being disposed on a movable member that is displaceable in response to an operation;
- and
- a signal generator:
- including a second coil that opposes the first coil;
- and
- being configured to generate a detection signal based on a relative position between the first coil and the second coil, wherein:
- the first coil includes a first part and a second part that generate opposite magnetic fields from each other in response to a current being received by the first coil,
- the second coil includes a third part and a fourth part that generate opposite magnetic fields from each other in response to a current being received by the second coil, and
- a first distance between a center of the first part and a center of the second part is greater than a second distance between a center of the third part and a center of the fourth part.
Dependencies are inferred from the claim text.