Noncontact charging device, charger, cordless electric equipment, and noncontact charger
First Claim
1. A noncontact charging device for transmitting power, by making use of mutual induction between a primary side induction coil provided in a charger and a secondary side induction coil provided in a cordless equipment incorporating a secondary battery therein, from said charger to said cordless equipment and charging said secondary battery;
- wherein capacitors are connected in parallel to said primary side induction coil as well as to said secondary side induction coil respectively and an LC parallel resonance circuit is formed with this parallel connected in each of said charger and said cordless equipment, each of said primary side induction coil and said secondary side induction coil is built with a sheet coil and the sheet coils are provided and fixed in said charger and said cordless equipment so that the sheet coils face to each other at a specified gap from each other in the charging state where said cordless equipment is set in said charger.
1 Assignment
0 Petitions
Accused Products
Abstract
Capacitors are connected in parallel to a primary side induction coil in a charger 1 and a secondary side induction coil in a cordless equipment (handset unit) respectively, and LC parallel resonance circuits are formed in the charger and the cordless equipment respectively with this parallel connection. Each of the primary side induction coil and secondary side induction coil is formed with a sheet coil, and the sheet coils are arranged and fixed in the charger and the cordless equipment respectively so that the sheet coils face to each other with a prespecified gap in the charging state where the cordless equipment has been set in the charger.
162 Citations
24 Claims
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1. A noncontact charging device for transmitting power, by making use of mutual induction between a primary side induction coil provided in a charger and a secondary side induction coil provided in a cordless equipment incorporating a secondary battery therein, from said charger to said cordless equipment and charging said secondary battery;
- wherein capacitors are connected in parallel to said primary side induction coil as well as to said secondary side induction coil respectively and an LC parallel resonance circuit is formed with this parallel connected in each of said charger and said cordless equipment, each of said primary side induction coil and said secondary side induction coil is built with a sheet coil and the sheet coils are provided and fixed in said charger and said cordless equipment so that the sheet coils face to each other at a specified gap from each other in the charging state where said cordless equipment is set in said charger.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A noncontact charger for transmitting power to a cordless equipment including a secondary side induction coil and a secondary battery by making use of mutual induction by a primary side coil to charge said secondary battery comprising:
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a resonance circuit including a primary side induction coil; a resonance state switch for switching a resonant voltage level in said resonance circuit between a high level and a low level; and a mutual induction state detector for checking whether said primary side induction coil is in the mutual induction state or not according to oscillation amplitude in said resonance circuit;
wherein the a oscillation voltage level in said resonance circuit is set to a high level by said resonance state switch when a mutual induction state is being detected by said mutual induction state detector, and otherwise is set to a low level by said resonance state switch. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification