JPH0438833U

JPH0438833U -

Info

Publication number: JPH0438833U
Application number: JP8104790U
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図は、下方位置での平行
状態における、シートの前後チルト機構の概略縦
断面図、第３図は、前部、後部のロツク手段の部
分拡大斜視図、第４図は、第３図の線−に沿
つた端面図、第５図ないし第７図は、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、６０，６１
……ロツク手段、６４，６５……延出ピン、６８
，６９……ロツクアーム、７０，７１……ガイド
孔、７４，７５……歯部、７６，７７……ロツク
プレート、８４……アウターロツド、８５……イ
ンナーロツド、８８，８９……操作レバー、９２
，９３……偏倚手段、１００……シートクツシヨ
ン。 Fig. 1 is a schematic perspective view of the seat longitudinal tilt mechanism according to this invention, Fig. 2 is a schematic vertical cross-sectional view of the seat longitudinal tilt mechanism in a parallel state at the lower position, and Fig. 3 is a front view of the seat longitudinal tilt mechanism. , a partially enlarged perspective view of the rear locking means; FIG. 4 is an end view taken along the line - of FIG. 3; FIGS.
FIG. 3 is a schematic longitudinal cross-sectional view of the front and rear tilting mechanism of the seat in a forward tilted state and in a parallel state at an upper position. 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, 60, 61
... Locking means, 64, 65 ... Extension pin, 68
, 69... Lock arm, 70, 71... Guide hole, 74, 75... Teeth, 76, 77... Lock plate, 84... Outer rod, 85... Inner rod, 88, 89... Operation lever, 92
, 93... biasing means, 100... seat cushion.

Claims

[Claims for Utility Model Registration] (1) A pair of link arms disposed spaced apart from each other in the front and back between the upper frame and the lower frame, and comprising at least a pair of left and right link arms whose upper and lower ends are interlockably connected, respectively. a link mechanism; front and rear locking means respectively arranged corresponding to the front and rear link mechanisms;
In a seat back-and-forth tilt mechanism in which the upper frame is raised and lowered relative to the lower frame by the swinging of a link mechanism, the front and rear locking means are connected to the upper frame through guide holes in the upper frame. a lock arm having an extending pin extending outward from the upper frame at one end and pivotally connected to the link arm at a position below the upper end; A lock plate has a plurality of teeth that can be engaged with each other and is swingably mounted in the axial direction of the extension pin in conjunction with an operating lever; the teeth of the lock plate are engaged with the extension pin of the lock arm. The front and rear link mechanisms are individually locked and unlocked by regulating the movement of the extending pin in the guide hole of the upper frame. A front and back tilt mechanism for the seat. (2) The front and back tilt mechanism for a seat according to claim 1, wherein the front and rear lock plates are pivotally supported by a bracket outside the upper frame and are each fixed to individual rods having operating levers at their front ends. (3) The seat longitudinal tilt mechanism according to claim 2, wherein the front and rear lock plates are respectively fixed to concentric outer rods and inner rods that are pivotally supported by a bracket outside the upper frame. (4) The seat longitudinal tilt mechanism according to claim 2 or 3, wherein the operating levers for operating the front and rear lock plates are each formed into a planar uneven shape that can be combined.