An adjustable back cushion

Abstract

This utility model discloses an adjustable backrest cushion, comprising: a base; a main connecting piece, the tail end of which is connected to the base; an upper main piece, located at the upper part of the head end of the main connecting piece; a lower main piece, located at the lower part of the head end of the main connecting piece; and a transmission module, connected to the main connecting piece, the upper main piece, and the lower main piece. When the upper main piece is subjected to pressure and retracts, the transmission module transmits power to move the lower main piece forward; conversely, when the lower main piece is subjected to pressure and retracts, the transmission module transmits power to move the upper main piece forward. This utility model has the following beneficial effects: Self-triggering adjustment: Utilizing the body's own weight to drive the mechanism, it achieves automatic feedback that "the further you lean back, the stronger the lumbar support." Real-time support force balance: Under rigid mechanical reverse linkage conditions, it achieves dynamic tracking and adjustment of the cushion's support position, adapting to the spinal curvature of different individuals.

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