| 摘要 |
The present invention relates to a crank arm assembly. In the crank arm assembly (10), a second arm (20) is rotated with a first arm (12) when the position of a pedal (32) is adjusted. An internal space (14) in which a part of the second arm (20) is inserted is formed inside the first arm (12), when a fixture (26) having fixing grooves (28) is formed in the internal space (14). An even number of fixing protrusions (24) hung on the fixing grooves is symmetrically formed on the second arm (20). The fixing protrusions (24) are not arbitrarily separated from the fixing grooves (28) by supporting the second arm (20) with an elastic member (30) in the internal space (14). The present invention can minimize a space for the storage of a bicycle by simply adjusting the position of the pedal (32). |
