A height-adjustable backrest assembly includes a connecting member an upper end mounted between a positioning board having vertically spaced positioning grooves and a backrest movable relative to the positioning board in a vertical direction. A lower end of the connecting member is coupled to a seat or a base. A positioning button is pivotably mounted to the connecting member and has a positioning section biased by a spring to releasably engage one of the positioning grooves. A transfer groove below the bottommost positioning groove receives the positioning button when the positioning section of the positioning button disengages from the positioning grooves. The positioning button abuts against an abutment member on the connecting member to limit the positioning section in a position not aligned with the positioning grooves. The abutment section disengages from the abutment member when an abutment protrusion of the positioning board presses against the positioning section.
Height-adjustable backrest assembly
2015-08-25
Patent
Electronic Resource
English
Intelligent automobile seat with height-adjustable backrest
European Patent Office | 2015
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