Leg multi-choice activity sofa mechanical stretching device

Abstract

The invention relates to a multiple-leg-choice movable sofa machine stretching apparatus. The apparatus comprises a left part, a right part, a switch part, an extension spring, a self-locking spring and a backrest return spring, and the left part and the right part are respectively provided with same leg structures, an S slide spacing connecting piece, an S slide connector 1, a slide connector 2, a slide connector 3, a slide connector 4, a slide connector 5, an S leg drive connecting piece, an S front supporting piece, an S rear supporting piece, an S auxiliary mounting piece, an S mounting side plate, an S seat frame mounting plate, a backrest push piece, an S back spacing piece, a fixed connecting piece, an S back connecting piece, an S back connector, an S stay rope drive connecting piece, an S stay rope fixed connecting piece, an S square tube connecting piece and a flange fixing piece. The quantity of the selectable leg structures is two, and the two leg structures respectively adopt 8 parts and 6 parts, and can respectively cooperate with other parts to form the complete apparatus. The composition, connecting points, spacing and connecting rod drive of the parts are designed, and bearings are used for rotating connection; and the apparatus can comfortably, safely and stably run, and the legs are selectable.

Description

technical field [0001] The invention relates to a sofa seat device, in particular to a multi-functional sofa mechanical stretching device with multi-selection activities for legs, which can be folded or unfolded, and the angle of the backrest can be adjusted to a certain extent. Background technique [0002] At present, there are four major deficiencies in the existing mechanical stretching devices for movable sofas: 1. The sitting height is generally high, causing users to have their feet not touching the ground during use, and the legs will feel tired after a long time. affect the comfort of the sofa. 2. The stamping parts of the iron frame at the bottom of the sofa are exposed, forcing the bottom of the functional sofa to not be completely covered during development, making the mechanical extension device of the sofa appear unsafe, and affecting the appearance and use of the functional sofa. 3. The slide rail driving device forces the left and right pieces of the functio...

AI Technical Summary

Problems solved by technology

[0002] At present, there are four major deficiencies in the existing mechanical stretching devices for movable sofas: 1. The sitting height is generally high, causing the user's feet to not touch the ground during use, and the legs will feel tired after a long time. Affect the comfort of the sofa

2. The stamping parts of the iron frame at the bottom of the sofa are exposed, forcing the bottom of the functional sofa to not be completely covered during development, making the mechanical extension device of the sofa appear unsafe, and affecting the appearance and use of the functional sofa.

3. The slide rail driving device forces the left and right pieces of the functional sofa to appear out of sync during the stretching process, which affects the user's comfort and operating sensitivity

4. During use, the movable sofa mechanical stretching device and the seat cushion will partially sink, which will affect the service life of the movable sofa mechanical stretching device, and thus bring safety hazards to users

5. The backrest lacks comfort in the process of lying down, which brings fatal flaws to the functional sofa

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