Wireless power feeder, light source cartridge, and wireless illumination system

1. A wireless power feeder comprising:

a feeding body having a cylindrical part capable of housing a light source cartridge and incorporating a feeding coil for supplying AC power to the light source cartridge; and

a power transmission control circuit that supplies the AC power to the feeding coil, wherein

the feeding body is configured to be able to change the insertion depth of the light source cartridge and stabilize the position of the light source cartridge.

2. The wireless power feeder according to claim 1 , wherein

a screw groove is formed in the inner wall of the cylindrical part of the feeding body, and the light source cartridge is fixed by the screw groove.

3. The wireless power feeder according to claim 1 , comprising a plurality of feeding bodies, wherein

the power transmission control circuit supplies the AC power to the plurality of feeding bodies.

4. The wireless power feeder according to claim 3 , wherein

the plurality of feeding bodies are connected in parallel to one another, and

the power transmission control circuit supplies the same AC voltage to the plurality of feeding bodies.

5. The wireless power feeder according to claim 1 , wherein

the power transmission control circuit includes:

a bridge rectification circuit in which diodes are bridge-connected to one another;

an AC power supply connected between the first and second connection points among four connection points of the bridge rectification circuit;

a capacitor connected between the third and fourth connection points of the four connection points and charged by the AC power supply;

a switch inserted into a path of current discharged from the capacitor; and

an oscillator that supplies AC current from the capacitor to the feeding coil by intermittently turning ON/OFF the switch.

6. The wireless power feeder according to claim 5 , wherein

the oscillator can be controlled in terms of its oscillating frequency, and

the magnitude of the AC power is changed depending on the oscillating frequency.

7. The wireless power feeder according to claim 1 , wherein

the feeding coil is connected to a first capacitor in the inside of the feeding body,

the resonance frequency between a receiving coil and a second capacitor which are included in the light source cartridge coincides with the resonance frequency between the feeding coil and the first capacitor, and

the power transmission control circuit supplies the AC power at the resonance frequency.

8. The wireless power feeder according to claim 1 , further comprising an indicator indicating the insertion depth of the light source cartridge into the feeding body.

9. A light source cartridge formed so as to be inserted into a feeding body in the wireless power feeder as claimed in claim 1 , comprising:

a light source body;

a receiving coil connected to the light source body; and

means for fixing the light source cartridge to the feeding body, wherein

the receiving coil is disposed at a position opposite to the feeding coil when the feeding body and the light source cartridge are attached to each other.

10. The light source cartridge according to claim 9 , further comprising an indicator indicating the insertion depth into the feeding body.

11. A wireless illumination system comprising:

the wireless power feeder as claimed in claim 1 ; and

the light source cartridge as claimed in claim 9 which is inserted into the feeding body of the wireless power feeder.