Lifter mechanism and vehicle seat

摘要

A neck injury is improved with a structure having a lifting mechanism part only on one side. While a lifting driving part is provided on a side of one side frame, a coupling driving rod is coupled to a rotation center of a drive gear a driving link is disposed on a side of the other side frame, and the driving link is coupled to the coupling driving rod. A driving force in the lifting driving part operates on the side of one side frame having the drive gear, but on the side of the other side frame, the driving link rotates together with the drive gear via the coupling driving rod, so as to perform a lifting or lowering operation. The shape of a virtual square coupling contact points of the driving link, the side connectors, the coupling driving rod, and the drive gear does not collapse, and thus an external input is dispersed.

主权项

1. A lifter mechanism for supporting a cushion frame unit supporting a cushion member for a seat cushion part in a manner capable of lifting or lowering by driving a lifting driving part with respect to a left slider and a right slider constituting a seat slide device, the lifter mechanism comprising:
a front link and a rear link provided between each of side frames disposed on a left side and a right side of the cushion frame unit and one of the sliders; a lifting driving part comprising a drive gear provided on one side frame out of the side frames and disposed between the front link and the rear link of a side of the one side frame, so as to transmit a driving force for lifting or lowering; a coupling driving rod including one end that is coupled to a rotation center of the drive gear to rotate with the drive gear; one side connector on the side of the one side frame where the lifting driving part is provided, the one side connector extending forward from the rear link of the side of the one side frame and bridged to the drive gear; another side connector on a side of the other side frame where the lifting driving part is not provided, to extend forward from the rear link of the side of the other side frame; and a driving link with one end coupled to a front end of the other side connector, wherein another end of the coupling driving rod is structured to be coupled to another end of the driving link, so as to transmit a rotation force of the drive gear to the driving link via the coupling driving rod.