Patent ID: 6732842
Filing Date: 2004-05-11
Classification: B60N,Y10T

Abstract:
A ratchet-type lever mechanism comprising:an output shaft element rotatably provided in said ratchet-type lever mechanism; a ratchet gear wheel means rotatably provided in said ratchet-type lever mechanism; said ratchet gear wheel means including a first ratchet gear wheel and a second ratchet gear wheel, wherein each of said first and second ratchet gear wheels has one-way clutch means built therein, with such an arrangement that said first ratchet gear wheel is to be locked to said output shaft element in a normal direction for rotation therewith, while being allowed to rotate in a reverse direction, and that said second ratchet gear wheel is to be locked to said output shaft element in said reverse direction, while being allowed to rotate in said normal direction; an input shaft element rotatably supported in said ratchet-type lever mechanism; a ratchet pawl member so formed from a plate material to have: a flat body portion; a first toothed pawl portion; and a second toothed pawl portion, wherein said first and second toothed pawl portions extend from said flat body portion in a spaced-apart manner, such that said second toothed pawl portion is bent from said first toothed pawl portion in an offset relation with respect to said body portion; said first and second toothed pawl portions being disposed in correspondence with the respective said first and second ratchet gear wheels; and a connecting means for connecting said ratchet pawl member to said input shaft element, said connecting means being defined in said input shaft and ratchet pawl elements.