Patent ID: 7789447

Claim:
A height adjuster for a seat of a vehicle, comprising: a support base placed in a vehicle; a mount base slidably disposed over the support base, the mount base mounting a seat portion of the vehicle seat; and first and second link mechanisms disposed between the support base and the mount base, the link mechanisms being opposed to each other to link the support base and the mount base, said link mechanisms each being configured to lower the mount base that slides toward a door opening over the support base to an outside of a vehicle that is lower than an inside of the vehicle via the door opening from an upside of the support base and to raise the mount base that has lowered to the outside of the vehicle to a position before lowered, wherein rotatably pivoted rotational members are provided at both sides of end parts at a door opening side of the support base in a state in which the mount base can slide toward the door opening, each of the link mechanisms is provided with: first and second turning shafts turnably pivoted about the support base; third and fourth turning shafts turnably pivoted about the mount base; a first planar member of which a plate face of one end and a plate face of the other end are turnably pivoted about the first turning shaft and about the third turning shaft, respectively, a first guide face formed in a curved shape in which the rotational member relatively rolls is formed to be recessed from a lower end face toward an upper end face, and further, a height from the upper end face of a portion at which the first guide face is formed up to the first guide face is formed to be lower than a height from the upper end face to the lower end face of a portion at which the first guide face is not formed; a first planar reinforcement member of which a plate face of one end and a plate face of the other end are pivoted about the first turning shaft and about a third turning axis, respectively, the first reinforcement member being adapted to reinforce the first planar member; and a second planar member of which a plate face of one end is turnably pivoted about the second turning shaft and a plate face of the other end is turnably pivoted about the fourth turning shaft, respectively, and wherein said each rotational member relatively rolls along said each first guide face of said each first planar member, whereby said mount base pivoted about said each link mechanism is configured to be elevated at a trajectory that corresponds to a shape of said each first guide face.