INFINITELY VERTICALLY ADJUSTABLE DROP DOWN ARMREST MECHANISM

摘要

A vehicle seat having a bottom frame, a seat back connected to the frame, and an armrest capable of upward and downward movement. The armrest includes a seat bracket connecting the armrest to the frame and a vertically variable adjustment mechanism. The mechanism has a control disposed in the armrest, a lock actuated to an engaged or disengaged position by the control, a rack disposed in a generally vertical direction, and a one-way bearing acting as pinion and having two rotational states. The first rotational state is a locked state where the lock is engaged and prevents the one-way bearing from rotating, preventing the rack and armrest from a downward movement. The second rotational state is a free state where the lock is in the engaged position and a force is applied in the upward direction, the one-way bearing can rotate, allowing the rack and armrest an upward movement.

主权项

1. A vehicle seat comprising:
a seat bottom frame having a back and a side; a seat back connected to the back of the seat bottom frame; and an armrest connected to the side of the seat bottom frame, capable of vertical, upward and downward movement, the armrest comprising:
a seat bracket connecting the armrest to the seat bottom frame; anda vertically variable adjustment mechanism, comprising:
a control disposed in the armrest;a lock actuated to an engaged position and a disengaged position by the control;a rack disposed in a generally vertical direction; anda one-way bearing acting as pinion to the rack and having at least a first rotational state and a second rotational state, wherein the first rotational state of the one-way bearing is a locked state where the lock is in the engaged position and prevents the one-way bearing from rotating, this prevents the rack from a downward movement, which prevents the armrest from the downward movement, and wherein the second rotational state of the one-way bearing is a free state where the lock is in the engaged position and a force is applied in the upward direction, the one-way bearing can rotate, allowing the rack an upward movement, which allows the armrest the upward movement.