JPH0426132U

JPH0426132U -

Info

Publication number: JPH0426132U
Application number: JP6836190U
Authority: JP
Priority date: 1990-06-27
Filing date: 1990-06-27
Publication date: 1992-03-02

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、第４図の線−に沿つた断
面図、第４図は、ロツク手段の正面図、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……シ
ート、１４……上部枠、１８……下部枠、２０，
２２……リンク機構（フロントリンク、リヤリン
ク）、３４……連結リンク、４０……ローラ、４
２……リターンばね、４４，４５……ロツク手段
、４８……歯部、５０……ロツクプレート、５６
……偏倚手段（トーシヨンばね）、５８，５９…
…操作レバー、６２……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 the fourth 4 is a front view of the locking means, and FIGS. 5 to 7 show the seat in the rearwardly tilted position, in the forwardly tilted position, and in the parallel position in the upper position. FIG. 3 is a schematic vertical cross-sectional view of the front and rear tilt mechanisms. 10...Seat longitudinal tilt mechanism, 12...Seat, 14...Upper frame, 18...Lower frame, 20,
22...Link mechanism (front link, rear link), 34...Connection link, 40...Roller, 4
2... Return spring, 44, 45... Locking means, 48... Teeth, 50... Lock plate, 56
...Biasing means (torsion spring), 58, 59...
...Operation lever, 62... Seat cushion.

Claims

[Scope of Claim for Utility Model Registration] (1) An upper frame that is disposed opposite to the lower frame and has an opening on the inside, and the upper and lower ends have outwardly extending shafts and are interlocked with each other. It also has a pair of left and right link arms whose lower ends are pivotally connected to the lower frame, and a pair of link mechanisms spaced apart in the front and rear between the upper frame and the lower frame, and a pair of link arms at the upper ends of the front and rear link mechanisms. Supported by an extending shaft,
The rollers are arranged so as to be able to roll within the opening of the upper frame, the connecting links that rotatably connect the upper frame and the lower frame, and the swinging of the front and rear link mechanisms are individually regulated and operated. A front and rear tilting mechanism for a seat, comprising front and rear locking means for individually locking and unlocking each link mechanism by operating a lever. (2) The locking means has a plurality of teeth that can be engaged with the extending shaft at the upper end of the link mechanism, and is attached to the lock plate so as to be swingable in the axial direction of the extending shaft, and is integrated with the lock plate. The seat according to claim 1, comprising: an operating lever that is swingably provided; and biasing means that biases the teeth of the lock plate in the direction of engagement with the extending shaft of the upper end of the link arm. Front and rear tilt mechanism.