Ikeda Bussan Co. Ltd.

Koichi Iwasaki

Yuji Tanaka

Manabu Sakamoto

A seat adjuster of a vehicular seat is provided with a seat lifting mechanism which includes front and rear shafts which are supported to vertically extending walls of a pair of seat rails for sliding a vehicular seat. One end portion of each shaft has a bulged portion for receiving the wall and a groove for setting a stop ring. The end portion is inserted to a through-hole of the wall and limitingly connected thereto by means of the bulged portion and the stop pin set in the groove.

Vehicular seat adjuster

A moveable headrest is equipped with a lower headrest frame shaft fixedly connected to a headrest stay detachably connected to the upper end of the seat back, and a pair of ratchet bases rotatably supported on respective shaft ends of the lower frame shaft. The ratchet bases are coupled with each other at their upper ends through a moveable upper headrest frame. A ratchet-and-pawl mechanism is attached to at least one of the base members for selectively engaging the upper frame with the lower frame shaft and for producing a forward-and-backward angular adjustment of the headrest. The shaft end of the lower frame shaft is formed with an annular stepped portion extending continuously in a peripheral direction of the lower frame shaft nearby the top end, so that the annular stepped portion abuts the inside wall surface of the ratchet base. A pawl bracket is fixedly connected to the shaft end of the lower frame shaft by all-around welding, while sandwiching the ratchet base between the stepped portion and the pawl bracket.

Growing community of inventors

Ayase, Japan

Koichi Iwasaki