JPH0448853U

JPH0448853U -

Info

Publication number: JPH0448853U
Application number: JP1990091110U
Authority: JP
Priority date: 1990-08-29
Filing date: 1990-08-29
Publication date: 1992-04-24
Anticipated expiration: 2005-07-12
Also published as: JPH0729876Y2

Description

[Brief explanation of the drawing]

図面は本考案の実施例を示し、第１図は第１の
実施例の縦断側面図、第２図は第１図の−視
断面図、第３図は第１図の−視断面図、第４
図は第１図の−視平面図、第５図は第１の実
施例の変形例を示す要部斜視図、第６図は第２の
実施例の縦断側面図、第７図は第６図の−視
概略断面図である。１……脚体、２……支持機構、３……固定枠体
、４……背もたれ支持体、６……背もたれ、８…
…横支軸、９……座体、１０……座板、６……座
体用の圧縮ばね、１７……ねじりばね体、１７ａ
……上自由端部、１７ｂ……下自由端部、２０…
…被押圧体の一例としての揺動杆、２３……連動
杆、２５……円弧状ガイド体、２６，３０……押
圧体、３３……ガイド体、３１……ワイヤー、３
２……座体用板ばね、３５……接当部の一例とし
てのガイドローラ。 The drawings show embodiments of the present invention; FIG. 1 is a longitudinal sectional side view of the first embodiment, FIG. 2 is a sectional view taken from the side of FIG. 1, and FIG. Fourth
The figure is a plan view from the - side of FIG. 1, FIG. 5 is a perspective view of main parts showing a modification of the first embodiment, FIG. FIG. DESCRIPTION OF SYMBOLS 1... Leg body, 2... Support mechanism, 3... Fixed frame, 4... Backrest support, 6... Backrest, 8...
...Horizontal support shaft, 9... Seat body, 10... Seat plate, 6... Compression spring for seat body, 17... Torsion spring body, 17a
...Upper free end, 17b...Lower free end, 20...
... Swinging rod as an example of a pressed object, 23 ... Interlocking rod, 25 ... Arc-shaped guide body, 26, 30 ... Pressing body, 33 ... Guide body, 31 ... Wire, 3
2... A plate spring for the seat body, 35... A guide roller as an example of a contact portion.

Claims

[Scope of claims for utility model registration] (1) A backrest support body to which a backrest is attached,
The front part of the support mechanism attached to the upper part of the leg body is pivoted via a horizontal support shaft so that it can freely tilt backward, and the seat body is moved downwardly against the spring body for the seat body above the backrest support. A coil-shaped torsion spring body is arranged between the support mechanism and the backrest support body, the free ends of which are positioned above and below, and the lower free end of the body is arranged so as to be rotatable back and forth relative to the support mechanism. The upper free end of the torsion spring body is arranged so as to be in contact with the lower surface of the backrest support member so as to be slidable back and forth, while being pressed against either the seat body or the backrest supporter. The other side is provided with a pressed body that contacts the pressing body so that the pressed body rotates or moves backward when the seat body moves downward, and the torsion spring body is attached to the pressed body. A locking device for a backrest of a chair, characterized in that the upper free end portions of the backrest of the chair are connected to each other. (2) The backrest support with the backrest attached,
The front part of the support mechanism attached to the upper part of the leg body is pivoted via a horizontal support shaft so that it can freely tilt backward, and the seat body is moved downwardly against the spring body for the seat body above the backrest support. A coil-shaped torsion spring body is arranged between the support mechanism and the backrest support body, the free ends of which are positioned above and below, and the lower free end of the body is arranged so as to be rotatable back and forth relative to the support mechanism. The upper free end of the torsion spring body is arranged so as to be in contact with the lower surface of the backrest support so as to be slidable back and forth. a guide body having an inclined guide surface, and a contact portion that contacts the inclined guide surface of the guide body on the other side, so that the seat body moves backward when the seat body moves downward;
A device for locking a backrest of a chair, characterized in that an upper free end of the torsion spring body is interlockingly connected to the seat body.