Adjustable lifting chair back structure

Abstract

The utility model discloses an adjustable lifting chair back structure, a channel at the rear side of a first connecting part of a backrest frame comprises a first guide section, a locking section, a second guide section and a return section which are sequentially connected end to end and form a continuous path, the locking section comprises a positioning guide groove, and the second guide section and the positioning guide groove are consistent with the first guide section in inclination direction; the second connecting part of the chair back frame is detachably connected with the first connecting part in a sliding manner; the locking assembly comprises a base detachably arranged on the second connecting part and a locking piece which is connected with the front side of the base and can swing and reset, one end of the locking piece is inserted into the channel, and when the backrest frame moves relative to the chair back frame, the locking piece moves in the channel along a continuous path; and when the locking pieces are respectively arranged at the inner ends of the first guide section, the second guide section and the positioning guide groove, the locking pieces are in a reset state. Therefore, the chair back structure is convenient to assemble, and the lifting of the backrest frame can be smoothly and stably adjusted.

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