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Title:
ELECTRIC TOOL AND ITS INSULATING METHOD
Document Type and Number:
Japanese Patent JP2003231071
Kind Code:
A
Abstract:

To provide a low-cost double insulation type portable electric disk grinder securing heat resistance and physical durability of its outer frame, having a superior safety to electric leakage, and miniaturizing the external shape of the outer frame.

An insulating resin material is poured from a rotor support part 1a formed in the outer frame 1 to the inner surface or inner/outer surfaces of the outer frame 1 by an injection molding so as to be formed into a thin insulating layer 11. In another constitution and method, this electric tool is provided with an insulation piece 12a covering over the inner surface of the outer frame 1 and an insulating block 12b covering over the rotor support part 1a and a support rib 1c.


Inventors:
IKEDA TOMOYA
HOSOKAWA NOBUHITO
YOKOYAMA JINICHI
Application Number:
JP2002000016823
Publication Date:
August 19, 2003
Filing Date:
January 25, 2002
Export Citation:
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Assignee:
HITACHI KOKI KK
International Classes:
B25F5/00; B29C45/14; H02K1/18; H02K5/08; H02K7/14; H02K13/00; H02K15/12; B29K105/22; B29L31/28; H02K5/14; (IPC1-7): B25F5/00; B29C45/14; H02K7/14; H02K13/00; H02K15/12
Domestic Patent References:
JPH09314481A1997-12-09
JPS317646B1
JPH11254339A1999-09-21
JPH11320456A1999-11-24
JP2000301411A2000-10-31
JPH01175185U1989-12-13
JPS63253839A1988-10-20
JPS61197172A1986-09-01



 
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