Mechanical stretching unit and mechanical stretching device

Abstract

The invention discloses a mechanical stretching unit and a mechanical stretching device. The mechanical stretching unit comprises a footstool assembly, a cushion supporting assembly and a backrest assembly. The cushion supporting assembly comprises a seat mounting plate, and a first connecting rod mechanism is formed by a rear supporting connecting rod, a first stool collapse connecting rod, a second stool collapse connecting rod, a first transverse connecting rod, a first longitudinal connecting rod and the seat mounting plate and is used for driving the footstool assembly to move between a folding position and an unfolding position relative to the seat mounting plate; the backrest assembly comprises a backrest piece and a second transverse connecting rod, the second transverse connectingrod is arranged on one side of the first transverse connecting rod in parallel, and a second connecting rod mechanism is formed by arranging a front longitudinal connecting rod, a bottom connecting rod, a rear longitudinal connecting rod and the second transverse connecting rod and used for driving the backrest assembly to move between a leaning position and a reclining position. The footstool assembly and the backrest assembly are driven by the two sets of connecting rod mechanisms correspondingly, movement is stable, and the stretching process is coherent.

Description

technical field [0001] The present invention relates to the field of sports upholstered furniture for supporting the body of a user in a substantially sitting-stand position, and more particularly relates to a mechanical stretching unit and a mechanical stretching device. Background technique [0002] There are currently reclining seating units on the market that allow the user to extend the footrest or ottoman forward and recline the backrest relative to the seat. These existing seating units typically provide three basic positions: a standard non-recline stowed position; an extended position; and a reclined position. In the stowed position, the bottom is in a generally horizontal orientation and the backrest is arranged substantially upright. Additionally, if the seating unit includes a couch to which the mechanism is attached, the mechanism folds so that the couch does not extend. In the extended position, commonly referred to as the television ("TV") position, the couc...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned seat unit can only be stretched, lifted and closed forcibly by the sliding long slot; thus, the stretching device cannot make the movement track of the product smooth because of the space gap of the slide slot. When leaning against the backrest, there will be a state of jumping or displacement, which greatly reduces the user's sense of experience

[0006] And in the process of folding or stretching the backrest, the plate where the chute is located relatively moves up or down to drive the parts used for cushion support to rotate. Since the cooperative movement track between the chute and the components is not smooth enough, the parts used for cushion support rotate. , there will also be jumping or displacement problems

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