Acceleration sensor with magnetic flux directing device
First Claim
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1. An acceleration sensor comprising:
- a cylindrical coil holder provided in a housing;
a coil wound around said coil holder;
a circular hole-like guide section provided coaxially with said coil holder in said housing;
a main magnet slidably held by said guide section;
a cylindrical yoke assembled coaxially and integrally with said main magnet and surrounding a periphery of the coil;
a front yoke provided at a front end of the main magnet, said front yoke directing magnetic flux from the main magnet in the direction orthogonal to the windings of the coil; and
means for attracting the main magnet provided within said housing to attract said main magnet in the direction opposite said coil.
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Abstract
An acceleration sensor is formed of a coil and a magnet which is capable of moving forward and back relative to the coil in the axial direction thereof. A change in speed applied to the acceleration sensor is detected through a magnitude of voltage generated in the coil due to the movement of the magnet.
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Citations
6 Claims
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1. An acceleration sensor comprising:
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a cylindrical coil holder provided in a housing; a coil wound around said coil holder; a circular hole-like guide section provided coaxially with said coil holder in said housing; a main magnet slidably held by said guide section; a cylindrical yoke assembled coaxially and integrally with said main magnet and surrounding a periphery of the coil; a front yoke provided at a front end of the main magnet, said front yoke directing magnetic flux from the main magnet in the direction orthogonal to the windings of the coil; and means for attracting the main magnet provided within said housing to attract said main magnet in the direction opposite said coil. - View Dependent Claims (2, 3)
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4. An acceleration sensor comprising:
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a cylindrical coil holder provided in a housing; a coil wound around said coil holder; a guide shaft provided coaxially with said coil holder within said housing; a main magnet slidably held by said guide shaft; and a cylindrical yoke assembled coaxially and integrally with said main magnet and surrounding a periphery of the coil; a front yoke provided at a front end of the main magnet, said front yoke directing magnetic flux from the main magnet in the direction orthogonal to the windings of the coil; and means for attracting the main magnet provided within said housing to attract said main magnet in the direction opposite said coil. - View Dependent Claims (5, 6)
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Specification