JPH0438832U

JPH0438832U -

Info

Publication number: JPH0438832U
Application number: JP8104690U
Authority: JP
Priority date: 1990-07-30
Filing date: 1990-07-30
Publication date: 1992-04-02

Description

[Brief explanation of the drawing]

第１図は、この考案に係るシートの前後チルト
機構の概略斜視図、第２図ないし第５図は、下方
位置での平行状態、後傾状態、前傾状態、および
、上方位置での平行状態における、シートの前後
チルト機構の各概略縦断面図である。１０……シートの前後チルト機構、１２，１４
……リンク機構（フロントリンク、リヤリンク）
、１６……シート、１８……上部枠、２２……下
部枠、２４，２５……リンクアーム、２８，２９
……連結ロツド、４８，４９……駆動手段、５２
，５３……モータ、６２，６３……リンク（支持
ブラケツト）、６６，６７……ナツト、７０，７
１……リードスクリユー、７４……シートクツシ
ヨン、７６，７７……操作スイツチ。 FIG. 1 is a schematic perspective view of the front and back tilt mechanism of the seat according to this invention, and FIGS. 2 to 5 show the parallel state in the downward position, the backward tilted state, the forward tilted state, and the parallel state in the upward position. FIG. 6 is a schematic vertical cross-sectional view of the seat front and rear tilt mechanism in each state; 10...Seat longitudinal tilt mechanism, 12, 14
...Link mechanism (front link, rear link)
, 16... Seat, 18... Upper frame, 22... Lower frame, 24, 25... Link arm, 28, 29
...Connection rod, 48, 49...Driving means, 52
, 53... Motor, 62, 63... Link (support bracket), 66, 67... Nut, 70, 7
1...Lead screw, 74...Seat cushion, 76, 77...Operation switch.

Claims

[Scope of Utility Model Registration Claim] A pair of left and right link arms whose lower ends are pivotally attached to the lower frame are movably connected by a connecting rod, and are spaced apart from each other in the front and back between the upper frame and the lower frame. In the front and back tilt mechanism of the seat, which is equipped with a pair of link mechanisms and in which the upper frame is raised and lowered relative to the lower frame by the swinging of the front and rear link mechanisms, a motor and a motor whose drive can be controlled by operating an operation switch are used. A driving means comprising: a nut rotatably attached to a support bracket fixed to a connecting rod of a link arm; a lead screw threaded onto the nut and operatively connected to a motor; , are installed separately in the front and rear link mechanisms, and as the lead screw rotates as the corresponding motor drives, the nut moves in the axial direction of the lead screw, and as the nut moves, the front and rear link mechanisms individually move. A back and forth tilt mechanism for the seat.