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Patent Searching and Data


Title:
CHARGER AND CHARGING METHOD FOR WORKING MACHINE
Document Type and Number:
Japanese Patent JPH10234138
Kind Code:
A
Abstract:

To easily and surely perform charging operation, while sustaining desired waterproofness and dustproofness effectively by charging a secondary battery through electromagnetic coupling under a state, where a tool holder incorporating the secondary is positioned relative to a power supply system.

A tool holder 12 is held by fitting the shank part 18 in the tapered hole 84 at a stand section 76, constituting a power supply mechanism 16. In this case, the power-receiving part 66 of the tool holder 12 is matched with a power-transmitting part 74 at the stand section 76 and a first ferromagnetic body 64 is brought into right contact with a second ferromagnetic body 72 through the repelling force of a spring 80. When high-frequency power is fed to a second winding coil, high-frequency power is induced in a first winding coil, coupled magnetically therewith and converted through a rectifier circuit into a DC power, which is fed through a smoothing circuit to a secondary battery 14. According to the arrangement, charging work of the secondary battery 14 is effected quickly and effectively by simply mounting the tool holder 12 on the stand side.


Inventors:
Komai, Yasuhiro
Masuda, Yukio
Application Number:
JP1997000072564
Publication Date:
September 02, 1998
Filing Date:
February 19, 1997
Export Citation:
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Assignee:
N T ENG KK
MASUDA YUKIO
International Classes:
H01M10/46; H02J7/00; H02J7/02; H02J17/00; (IPC1-7): H02J7/00; H01M10/46; H02J7/02; H02J17/00