| 摘要 |
#CMT# #/CMT# The backrest has a backrest carrier (10) and a backrest plate (30) fastened pivotably to the carrier by using a two-axle joint (20). The joint has a joint plate (21) that is connected with the backrest plate. Elastic units (22, 23) holding the joint in a normal position, and a retaining chamber (24) connected with the carrier. The joint plate is pivotable around two pivoting axes and is arranged in the retaining chamber between the elastic units that are supported against the retaining chamber. The elastic units are made from a compressible foam material e.g. polyurethane -foam material. #CMT#USE : #/CMT# Backrest for a chair i.e. office chair. #CMT#ADVANTAGE : #/CMT# The joint plate is pivotable around two pivoting axes and is arranged in the retaining chamber between the elastic units that are supported against the retaining chamber, so that the elastic units are loaded on pressure during loading of the joint, thus avoiding traction loaded connections and tearing off problem. The elastic units are made from a compressible foam material e.g. polyurethane -foam material, so that a sufficient flexibility of the joint connection is realized. The backrest enables the backrest plate to be connected with the backrest carrier in a flexible manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a vertical sectional view of a backrest. 10 : Backrest carrier 20 : Two-axle joint 21 : Joint plate 22, 23 : Elastic units 24 : Retaining chamber 30 : Backrest plate. |
