JPH0389658U

JPH0389658U -

Info

Publication number: JPH0389658U
Application number: JP15288389U
Authority: JP
Priority date: 1989-12-27
Filing date: 1989-12-27
Publication date: 1991-09-12
Anticipated expiration: 2004-06-15
Also published as: JPH0622278Y2

Description

[Brief explanation of drawings]

図面は本考案の実施例を示し、第１図は要部斜
視図、第２図は第１図の−視断面図、第３図
は第２図の−視裏面図、第４図は第２図の
−視断面図、第５図は第２図の−視断面図
、第６図は第２図の−視断面図、第７図は第
２図の箇所の作用説明図、第８図は背凭部の斜視
図、第９図は第８図の−視要部拡大断面図、
第１０図は第９図の−視裏面図、第１１図は
第９図の−視断面図、第１２図は第２背
凭部の作用説明図、第１３図は他の実施例の斜視
図である。１……支持台、２……脚支柱、３……支持体、
４……支持軸、５……座席本体、６……枠体、７
……傾動機構、８……コイルばね、９……リンク
機構、１０，１５，１７……枢軸、１１……前座
部、１２……第１背凭部、１３……第２背凭部、
１４，１６，１８……補助枠体、２０……引張体
、２２，２４……滑動子、２３……ガイドレール
、２５，３０，３１……板ばね体、２７，３３，
３４……摺動支持部、２８，３５，３６……押圧
部、２６，３８……引張りばね、４１，４２……
ピン。 The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the main part, FIG. 2 is a cross-sectional view from the side of FIG. 1, FIG. 3 is a rear view of FIG. 2, and FIG. 2 is a cross-sectional view of FIG. 2, FIG. 5 is a cross-sectional view of FIG. 2, FIG. 6 is a cross-sectional view of FIG. The figure is a perspective view of the backrest, FIG. 9 is an enlarged sectional view of the main part of FIG. 8,
FIG. 10 is a rear view of FIG. 9, FIG. 11 is a cross-sectional view of FIG. 9, FIG. 12 is an explanatory diagram of the operation of the second backrest, and FIG. It is a diagram. 1...Support stand, 2...Leg support, 3...Support body,
4... Support shaft, 5... Seat body, 6... Frame, 7
... tilting mechanism, 8 ... coil spring, 9 ... link mechanism, 10, 15, 17 ... pivot, 11 ... front seat section, 12 ... first backrest section, 13 ... second backrest section,
14, 16, 18... Auxiliary frame body, 20... Tension body, 22, 24... Slider, 23... Guide rail, 25, 30, 31... Leaf spring body, 27, 33,
34... Sliding support part, 28, 35, 36... Pressing part, 26, 38... Tension spring, 41, 42...
pin.

補正平２．１０．９実用新案登録請求の範囲を次のように補正する
。Amendment October 9, 2002 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】座席本体裏面側に適宜〓間を隔てて支持体を配
設し、且つ、座席本体に背凭部または／及び前座
部等の補助部を回動自在に連結して成る椅子にお
いて、前記〓間内に、座席本体への荷重の大きさ
に比例して引張り量を増大させる引張体を配設す
る一方、座席本体と補助部との裏面に、その両者
に跨がつて延びる板ばね体の先端を補助部側にば
ね連結し、板ばね体の基端を前記引張体に連結し
、該板ばね体の基端側を座席本体に摺動自在に支
持させ、板ばね体における長手方向中途を前記補
助部に設けた押圧部に接当するように構成し、こ
の板ばね体の断面二次モーメントを、当該板ばね
体の先端側に行くに従つて大きくなるように形成
したことを特徴とする椅子における座席体の弾力
調節装置。[Scope of claim for utility model registration] A support body is provided on the back side of the seat body at appropriate intervals, and an auxiliary part such as a backrest and/or a front seat is rotatably connected to the seat body. In the chair, a tension member is disposed in the space between the seat body and the tension body that increases the amount of tension in proportion to the magnitude of the load on the seat body. The distal end of the leaf spring body, which extends in a straight line, is spring-connected to the auxiliary part side, the base end of the leaf spring body is connected to the tension body, and the base end side of the leaf spring body is slidably supported by the seat body, The leaf spring body is configured such that its midway in the longitudinal direction comes into contact with a pressing portion provided in the auxiliary portion, and the moment of inertia of the leaf spring body increases as it approaches the tip side of the leaf spring body. A device for adjusting the elasticity of a seat body in a chair, characterized in that it is formed as follows.

Claims

[Scope of utility model registration request]

In a chair in which a support body is arranged at an appropriate interval on the back side of the seat body, and an auxiliary part such as a backrest part and/or a front seat part is rotatably connected to the seat body, the above-mentioned interval A tension body is disposed inside the seat body to increase the amount of tension in proportion to the magnitude of the load on the seat body, while a leaf spring body extending across the back of the seat body and the auxiliary part is assisted at the tip. The base end of the leaf spring body is connected to the tension body, the base end side of the leaf spring body is slidably supported by the seat body, and the middle part of the wide surface of the leaf spring body in the longitudinal direction is configured to come into contact with a pressing part provided on the auxiliary part,
1. A device for adjusting the elasticity of a seat body in a chair, characterized in that the width of the leaf spring body is formed so as to gradually become wider toward the distal end side of the leaf spring body.