Title:
PRESSING SPRING OF BRUSH FOR MOTOR
Document Type and Number:
Japanese Patent JPS6039340
Kind Code:
A
Abstract:
PURPOSE:To increase the lifetime of a brush by forming the material of a pressing spring of a brush for a motor of a shape memory alloy. CONSTITUTION:A brush 2 is formed to slide with a plurality of commutator segments 5 by the rotation of a motor, and the segments 5 are insulated by micas 6. Lead wirings 4 are respectively mounted at the brushes 2, and currents are supplied through the brush 2 to the segments 5. The surface, on which the brush 2 is slid with the segments 5, is provided with a spiral pressing spring 1 contacted at one end with the bottom 3-1 of a brush holder 3. A shape memory alloy is used for the material of the spring 1. Thus, the temperature rise of the commutator surface is transmitted to the spring 1, a voltage drop is reduced by increasing the pressing force, thereby lowering the raised temperature.
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Inventors:
BAN ITSUKI
OKADA HIDEO
OKADA HIDEO
Application Number:
JP14649483A
Publication Date:
March 01, 1985
Filing Date:
August 12, 1983
Export Citation:
Assignee:
SEKOH GIKEN KK
International Classes:
H01R39/00; H01R39/40; H02K13/00; (IPC1-7): H01R39/00; H02K13/00
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