| 摘要 |
<p>PROBLEM TO BE SOLVED: To effectively prevent the occurrence of imperfect rectification due to vibrations and the service life of a brush from becoming shorter. SOLUTION: A brush holder 20 is constituted by coaxially integrally forming a ring-like holder main body 21 into which carbon brushes 25 and 25 are inserted and a bearing box 22 in which a ball bearing which journals a motor shaft 14 is housed. Here, four rubber pins 32, 32, etc., are inserted into the holder main body 21 through the receiving seats 33 of a housing. Consequently, the whole brush holder 20 is elastically supported in the housing.</p> |
