Takano Co., Ltd.

Isao Okamoto

Kenji Tanaka

Toshiyuki Horiki

Ken Kikuchi

Masashi Kaneko

Fumihiro Kurata

Yousuke Shirotori

Kazuo Fujimoto

Chair

A chair has a body support structure with a membrane that can be stretched in an intended three-dimensional shape. The structure includes a frame member in a three-dimensional shape and forming a three-dimensional body support face expanding in three axes (y-axis direction), (x-axis direction), and (z-axis direction) orthogonal to each other and a membrane with peripheral edge portion fixed to the frame member under no tension or tension lower than tension required of the body support face, which has different heat shrinkage ratios in two directions, and to which the tension required of the body support face is imparted by heat shrinkage by heating after the fixing and a difference in tension generated in the heat shrinkage of the membrane forms the three-dimensional body support face.

Office chair

In order to provide a lumbar support apparatus whose position can be adjusted by a simple structure and which can softly support a lumbar vertebra portion of a sitting person, a lumbar support apparatus of a chair according to the present invention is configured by two lumbar support memberswhich are separated into left and right parts, each of the lumbar support membersincludes a lumbar support portionsupporting the lumbar vertebra portion and a stay portionsupporting the lumbar support portion, and an end portion of the lumbar support stay portionis rotatably connected and attached to a back framevia a rotation shaft, so that the position of the lumbar support portionin the height direction can be adjusted by moving the same such that its distal end side is moved in a circular manner about the rotation shaft

Lumbar support device for chair

Growing community of inventors

Nagano, Japan

Isao Okamoto