Lifting mechanism and height-adjustable backrest assembly

• Main Authors: ZHAO RONGZUN, CHENG BANGSHENG, DENG SHENGDI, LI CHANGXIN, RUAN HONGHE
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2019
• Subjects: PERFORMING OPERATIONS; SEATS SPECIALLY ADAPTED FOR VEHICLES; TRANSPORTING; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDEDFOR; VEHICLES IN GENERAL

The utility model relates to the technical field of backrest height adjustment, and provides a lifting mechanism and a height-adjustable backrest assembly, and the lifting mechanism comprises a sleeve, a lifting rod, a limiting hole groove, an adjusting piece and an acting piece. The lifting mechanism provided by the utility model is applied to adjusting the height of the backrest; the action piece only needs to be firstly acted; the action piece is rotationally matched with the adjusting piece; when the backrest is fixedly connected with the lifting rod, the limiting hole groove is opened orcontracted to enable the sleeve to lock or release the lifting rod, or the lifting rod is locked or released through sliding fit of the limiting hole groove of the action piece, so that the height ofthe lifting rod in the sleeve can be adjusted, and when the backrest is fixedly connected with the lifting rod, the height of the backrest can also be adjusted. Compared with an existing adjustable backrest assembly, the adjus