JPH0486537U

JPH0486537U -

Info

Publication number: JPH0486537U
Application number: JP12989690U
Authority: JP
Priority date: 1990-11-30
Filing date: 1990-11-30
Publication date: 1992-07-28
Anticipated expiration: 2005-03-01
Also published as: JPH078307Y2

Description

[Brief explanation of the drawing]

第１図乃至第８図は本考案の一実施例を示すも
ので、第１図は車両用シートのエアサスペンシヨ
ン装置の側面図、第２図は弁切替機構と給・排気
弁との取付状態を示す斜視図、第３図は弁切替機
構の操作レバーの取付状態と絞り弁を示すを斜視
図、第４図ａ，ｂは同上部分の側面図及び正面図
、第５図ａ，ｂはシートクツシヨンが下降した場
合の給・排気弁と弁切替機構との動作説明図、第
６図ａ，ｂはシートクツシヨンが上昇した場合の
給・排気弁と弁切替機構との動作説明図、第７図
はエア回路図、第８図は弁切替機構の操作レバー
により強制的にシートクツシヨンを最下位置にに
下降させる動作説明図、第９図は従来例を示す車
両用シートのエアサスペンシヨン装置の斜視図、
第１０図は同従来例の給・排気弁と弁切替機構の
拡大側面図である。１……ロアフレーム、２……アツパーフレーム
、３……リンク機構、５……空気ばね、７……給
気弁、８……排気弁、２０……弁切替機構、２２
……支持アーム、２３……弁切替カム、２３ａ，
２３ｂ……カム面、２４……操作レバー、５Ａ，
Ｂ……不感帯、Ｚ……基準高さ。 Figures 1 to 8 show one embodiment of the present invention, with Figure 1 being a side view of an air suspension device for a vehicle seat, and Figure 2 showing the installation of the valve switching mechanism and supply/exhaust valves. FIG. 3 is a perspective view showing the installed state of the operating lever of the valve switching mechanism and the throttle valve; FIGS. 4 a and b are side and front views of the same portion; FIGS. 5 a and b 6 is an explanatory diagram of the operation of the supply/exhaust valve and the valve switching mechanism when the seat cushion is lowered, and Figures 6a and b are explanatory diagrams of the operation of the supply/exhaust valve and the valve switching mechanism when the seat cushion is raised. Figure 7 is an air circuit diagram, Figure 8 is an explanatory diagram of the operation of forcibly lowering the seat cushion to the lowest position by the operating lever of the valve switching mechanism, and Figure 9 is a vehicle seat showing a conventional example. A perspective view of the air suspension device of
FIG. 10 is an enlarged side view of the supply/exhaust valve and valve switching mechanism of the conventional example. DESCRIPTION OF SYMBOLS 1... Lower frame, 2... Upper frame, 3... Link mechanism, 5... Air spring, 7... Air supply valve, 8... Exhaust valve, 20... Valve switching mechanism, 22
...Support arm, 23...Valve switching cam, 23a,
23b...cam surface, 24...operation lever, 5A,
B... Dead zone, Z... Reference height.

Claims

[Scope of claims for utility model registration] (1) A lower frame fixed on the floor of a vehicle,
an upper frame that is disposed above the lower frame and supports the seat cushion of the vehicle seat;
A link mechanism that supports the upper frame in a vertically movable manner relative to the lower frame, an air spring that supports the load generated on the upper frame, and a link mechanism that supplies air to the air spring from an air supply source or from inside the air spring When the seat cushion moves up and down from a reference height and exceeds a predetermined dead zone, the supply/exhaust valve is selectively opened to control the internal pressure of the air spring. In an air suspension device for a vehicle seat that includes a valve switching mechanism that returns the cushion to a reference height, the valve switching mechanism is supported by an elastically deformable spring material that is linked to the vertical movement of the seat cushion. It consists of an arm and a valve switching cam installed at the tip of this support arm. After the valve switching cam opens either the supply or exhaust valve, it supports the seat cushion until it returns to its standard height. An air suspension device for a vehicle seat, characterized in that the valve is maintained in the open state with elastic deformation of an arm. (2) In the air suspension device for a vehicle seat according to claim 1, the support arm of the valve switching cam of the valve switching mechanism is held at a reference position during normal times, and the valve switching cam controls the exhaust valve as necessary. An air suspension device for a vehicle seat, characterized in that it includes an operating lever for forcibly displacing and holding the seat in an open position.