| 摘要 |
A bicycle brake system includes a first arm unit (10) having a first arm (13) and an engaging slot (16). A second arm unit (20) is located in the engaging slot (16) and has a second arm (21). The first (13) and second (21) arms each have a brake pad (15, 23) and the two brake pads (15, 23) face the two sides of the wheel rim (60). A cam unit (30) has a contact piece (31) connected to the second arm unit (20) and a cam member (32) pivotably connected to the first arm unit (10). The cam member (32) includes a cam portion (321) having a curved surface which is in contact with the contact piece (31). An operation unit (40) is connected to the second arm unit (20) and includes a cable (42) which is fixed to the guide portion (322) of the cam member (32). The cam member (32) indirectly contacts the second arm unit (20) so that the second arm unit (20) does not wear out. |
