Battery charger cradle
First Claim
1. A battery charger cradle designed to be used with a battery built-in device having an induction coil and a battery rechargeable with power induced by the induction coil, the battery charger cradle comprising:
- a primary coil for inducing electromotive force to the induction coil;
a movement mechanism for moving the primary coil; and
a position detection controller for detecting a position of the induction coil and controlling the movement mechanism to bring the primary coil closer to the induction coil, whereinthe position detection controller includes;
a plurality of position detection coils;
a pulsed power source for supplying a pulse signal to one of the position detection coils;
a receiver circuit for receiving an echo signal outputted to the position detection coils from the induction coil which is excited by the pulse signal; and
a discrimination decision circuit for detecting a level of the echo signal received by the receiver circuit and judging the position of the induction coil on the basis of the level of the echo signal.
3 Assignments
0 Petitions
Accused Products
Abstract
In a battery charger cradle, a battery incorporated in a battery built-in device is charged by electric power induced to an induction coil. The cradle includes a primary coil for inducing electromotive force to the induction coil, a casing having a top plate atop of which the battery built-in device is placed, a movement mechanism for moving the primary coil along an inner surface of the top plate, and a position detection controller for detecting a position of the battery built-in device placed on the top plate and controlling the movement mechanism to bring the primary coil closer to the induction coil in the battery built-in device. When the battery built-in device is placed on the top plate, the position detection controller detects the position of the battery built-in device, and the movement mechanism moves the primary coil closer to the induction coil in the battery built-in device.
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Citations
12 Claims
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1. A battery charger cradle designed to be used with a battery built-in device having an induction coil and a battery rechargeable with power induced by the induction coil, the battery charger cradle comprising:
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a primary coil for inducing electromotive force to the induction coil; a movement mechanism for moving the primary coil; and a position detection controller for detecting a position of the induction coil and controlling the movement mechanism to bring the primary coil closer to the induction coil, wherein the position detection controller includes; a plurality of position detection coils; a pulsed power source for supplying a pulse signal to one of the position detection coils; a receiver circuit for receiving an echo signal outputted to the position detection coils from the induction coil which is excited by the pulse signal; and a discrimination decision circuit for detecting a level of the echo signal received by the receiver circuit and judging the position of the induction coil on the basis of the level of the echo signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification