Title:
BRUSH UNIT
Document Type and Number:
Japanese Patent JPS6173550
Kind Code:
A
Abstract:
PURPOSE:To reduce the loss and to increase the lifetime of a rush unit by disposing a carbon brush element having a small specific resistance at a commutation starting side and a carbon brush element having a large specific resistance at a commutation ending side, and integrating them to form a brush. CONSTITUTION:The first carbon brush element 7a having a small specific resistance is disposed at a commutation starting side with respect to the rotating direction A of a commutator 1, the second carbon brush element 7b having a large specific resistance is disposed at a commutation ending side, and integrated to form a carbon brush 7. Then, the brush 7 is pressed in contact with the periphery of the commutator 1 by a brush spring 5. Thus, since the specific resistance of the entire brush 7 decreases, the loss of the brush can be alleviated and preferably commutating action can be obtained to suppress the spark, thereby performing a long service lifetime.
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Inventors:
KONISHI TSUYOSHI
UCHIMOTO SATOSHI
UCHIMOTO SATOSHI
Application Number:
JP19508384A
Publication Date:
April 15, 1986
Filing Date:
September 17, 1984
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H01R39/46; H01R39/24; H01R39/26; H02K13/10; (IPC1-7): H01R39/46
Domestic Patent References:
| JPS5966082A | 1984-04-14 |
Attorney, Agent or Firm:
Akio Miyai