Okamura Corporation

Shinpei Totsuka

Hiroshi Masunaga

Ryou Igarashi

Chair

A backrest () includes: a tensile material () on which a load support surface () configured to receive a load of a seated person is formed; a back front frame (F) that supports an outer peripheral end portion () of the tensile material (); an attachment portion () which is formed in the back front frame (F) and faces the tensile material () in a state where the attachment portion () is separated from the tensile material () in a direction intersecting the load support surface (); and a lumber support () that is attachable to and detachable from the attachment portion (), in which the lumber support () includes an attaching portion () which extends in a direction along the load support surface (), is inserted into a gap (S) between the tensile material () and the attachment portion (), and is fixed to the attachment portion ().

Growing community of inventors

Yokohama, Japan

Shinpei Totsuka