Key system for a vehicle
First Claim
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1. A key system of an electromagnetic coupling type, comprising:
- a key for storing key information, said key having an inserting member and a head to be operated;
cylinder means for electromagnetically communicating with said key, said cylinder means including;
a cylinder body having a key insertion hole into which said inserting member of said key is inserted;
a rotor for receiving said key, said rotor being rotatable with said key;
a magnetic core for forming a magnetic circuit with said key, said magnetic core surrounding said rotor, said magnetic core being rotatable with said rotor; and
means for generating a magnetic field, said magnetic field generating means being substantially unmovable with respect to said rotor, said magnetic field generating means including;
a bobbin movably fitted on said magnetic core;
a wire would on said bobbin; and
a cylindrical member for leading said wire along an axis of said cylinder body, said cylindrical member being unitarily formed with said bobbin.
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Abstract
A key system provided with the key, a magnetic core, a cylinder body and the magnetic field generation coil. In the key system communication is performed through magnetic coupling between the key and a cylinder so as to drive a controlled object. An inductance and capacitance resonance (LC) circuit having intrinsic resonance points as key information is mounted in the head of the key. The magnetic core is secured to the outside circumferential surface of a rotor at the key insertion hole thereof so as to form a magnetic circuit in cooperation with the key when the key is inserted into the key insertion hole.
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Citations
8 Claims
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1. A key system of an electromagnetic coupling type, comprising:
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a key for storing key information, said key having an inserting member and a head to be operated; cylinder means for electromagnetically communicating with said key, said cylinder means including; a cylinder body having a key insertion hole into which said inserting member of said key is inserted; a rotor for receiving said key, said rotor being rotatable with said key; a magnetic core for forming a magnetic circuit with said key, said magnetic core surrounding said rotor, said magnetic core being rotatable with said rotor; and means for generating a magnetic field, said magnetic field generating means being substantially unmovable with respect to said rotor, said magnetic field generating means including; a bobbin movably fitted on said magnetic core; a wire would on said bobbin; and a cylindrical member for leading said wire along an axis of said cylinder body, said cylindrical member being unitarily formed with said bobbin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification