Rear chain shifter for bicycle
A technology for rear derailleurs and bicycles, which can be applied to vehicle parts, vehicle gearboxes, chain/belt transmissions, etc., and can solve problems such as difficulty in tightening nuts.
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[0033] overall composition
[0034] figure 1 A bicycle to which an embodiment of the present invention is attached is shown. The bicycle has: a frame 1 having a frame body 2 and a front fork 3; a handle portion 4; a front wheel 5f; a rear wheel 5r; a drive unit 7 for transmitting the rotation of the pedal 6 to the rear wheel 5r; front and rear brake devices 8f , 8r.
[0035] The frame body 2 is composed of a top tube 15 that is rotatably installed on the shaft system that is inclined to the front of the front fork 3, an upper tube 16, a lower tube 17, and a front triangle of the support tube 18. Part and the known rhombus frame body formed by the rear triangular part with the seat support 19 and the chain stay 20.
[0036] The seatpost 9a to which the saddle 9 is attached is attached to the stand tube 18 so that the vertical position can be adjusted. A front wheel 5f is attached to the lower end of the front fork 3 . The drive unit 7 is provided at the lower end of the st...
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