| 摘要 |
Disclosed herein is an arm rest device for a vehicle seat. The device comprises a shaft secured to a seatback of the seat; an arm rest proper pivotally connected to the shaft thereby to pivot between first and second angular positions; a generally circular plate concentrically secured to the shaft, the circular plate including a larger diameter sectoral portion and a toothed portion; a blocking plate pivotally disposed about the shaft, the blocking plate including a larger diameter sectoral portion and a radial extension, the radial extension having a flange and a notch; a latch member pivotally connected at its generally middle portion to the arm rest proper, the latch member having at its one end a pawl which is latchingly engageable with the toothed portion of the circular plate and at the other end a pointed portion which is engageable with the flange and notch of the blocking plate; first stopper structure for stopping the arm rest proper at the first and second angular positions; second stopper structure for stopping rotation of the blocking plate relative to the shaft when the blocking plate rotates by a given degree in a given direction to disengage the flange from the pointed portion; and biasing structure for biasing the latch member in a direction to achieve the latching engagement between the pawl and the toothed portion and biasing the blocking plate in the given direction.
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