公开(公告)号：EP2555391A4

公开(公告)日：2014-09-24

申请号：EP11759560

申请日：2011-03-25

申请人： TOYO TANSO CO

发明人： KAGAWA YOSHIKAZU ,  MAEDA TAKASHI ,  FUJIMURA TAKUJI ,  SHIRAKAWA HIDENORI

IPC分类号： H02K13/00 ,  H01R39/02 ,  H01R39/20 ,  H01R39/26

CPC分类号： H01R39/26 ,  H01R39/025 ,  H01R39/20

摘要： A carbon brush is provided that improves motor efficiency and achieves a longer service life. A carbon brush (1) to be pressed against an electrically-conductive rotor (2) is characterized by containing mesocarbon powder and an aggregate material containing carbon as at least one component thereof. It is preferable that the mesocarbon powder have a substantially spherical shape, and it is also preferable that the mesocarbon powder has been subjected to a preheating treatment. In addition, it is preferable that the temperature of the preheating treatment be from 500°C to 700°C.