Synchronous bending adjustment mechanism for furniture and sofas

Abstract

A synchronous bending adjustment mechanism for furniture, comprising a frame, a telescopic drive, and a first and a second multi-joint hinge mounted on the frame and designed to be bendable, wherein the first and second multi-joint hinges are spaced apart from each other and parallel, and the telescopic drive comprises a drive body and a telescopic body that slides telescopically within the drive body; wherein the synchronous bending adjustment mechanism for furniture further comprises a first synchronizing rod and a compensating device mounted on the first synchronizing rod and on the frame; the first and second multi-joint hinges are each provided with their own compensating device, and an input end of each of the first and second multi-joint hinges is connected to the compensating device;one of the drive bodies and telescopic bodies is articulated to the frame, while the other is articulated to the first synchronizing rod; and the telescopic drive is configured to drive the first and second multi-link hinges to perform synchronous bending movements in cooperation with the first synchronizing rod and the compensating device.

Claims

[1] A synchronous bending adjustment mechanism for furniture, comprising a frame, a telescopic actuator, and first and second multi-link hinges mounted on the frame and designed to be bendable, the first and second multi-link hinges being arranged at a distance from each other and in parallel, the telescopic actuator comprising a drive body and a telescopic body that slides telescopically within the drive body; the synchronous bending adjustment mechanism for furniture further comprising a first synchronizing rod and a balancing device mounted on the first synchronizing rod and the frame; the first and second multi-link hinges are each provided with their own balancing device, and an input end of each of the first and second multi-link hinges is connected to the balancing device;one of the drive bodies and telescopic bodies is hinged to the frame, while the other is hinged to the first synchronizing rod; and the telescopic drive is configured to drive the first and second multi-joint hinges to perform synchronous bending movements with the cooperation of the first synchronizing rod and the balancing device. [2] The synchronous bending adjustment mechanism for furniture according to claim 1, wherein the balancer comprises a first link arm pivoted on the frame, a second link arm pivoted on the first link arm, and a slider pivoted on the second link arm, the slider being mounted on the frame and connected to one end of the first synchronous rod, and the input end of each of the first and second multi-link hinges being connected to the slider. [3] The synchronous bending adjustment mechanism for furniture according to claim 2, further comprising a second synchronous rod arranged in parallel with the first synchronous rod; wherein one end of the second synchronous rod is connected to the first link arm corresponding to the first multi-link hinge, and the other end of the second synchronous rod is connected to the first link arm corresponding to the second multi-link hinge. [4] The synchronous bending adjustment mechanism for furniture according to claim 3, wherein the first link arm is provided with a first pivot point for connecting to the frame, a second pivot point for connecting to the second link arm, and a mounting connection position for connecting to the second synchronous rod, the mounting connection position and the second pivot point being arranged on opposite sides of the first pivot point. [5] The synchronous bending adjustment mechanism for furniture according to claim 4, wherein the first link arm has a bent portion extending in a direction parallel to the first and second multi-joint hinges, and the bent portion forms the mounting connection position. [6] The synchronous bending adjustment mechanism for furniture according to claim 2, wherein the frame comprises a first side frame, a second side frame, and a middle connecting frame; the first and second side frames are spaced apart from each other and arranged in parallel, the parallel orientation of the first and second side frames being the same as that of the first and second multi-link hinges; the first multi-link hinge is mounted at the head end of the first side frame, and the second multi-link hinge is mounted at the head end of the second side frame; the middle connecting frame is connected to the ends of both the first and second side frames; the first synchronous rod and the balancer are both located between the first and second side frames;the telescopic drive is positioned between the compensating devices corresponding to the first and second multi-joint hinges, and either the drive body or the telescopic body is hinged to the central connecting frame; [7] The synchronous bending adjustment mechanism for furniture according to claim 6, wherein the sliding body corresponding to the first multi-joint hinge is mounted on the first side frame, and a first transverse base spanning the sliding body is fixed to the first side frame in the parallel orientation, and the first link arm corresponding to the first multi-joint hinge is pivotally connected to the first transverse base; the sliding body corresponding to the second multi-joint hinge is mounted on the second side frame, and a second transverse base spanning the sliding body is fixed to the second side frame in the parallel orientation, and the first link arm corresponding to the second multi-joint hinge is pivotally connected to the second transverse base; the sliding body has a projecting extension portion in the parallel orientation, and the second link arm is pivotally connected to this projecting extension portion. [8] The synchronous bending adjustment mechanism for furniture according to claim 2, wherein the balancer and the frame together form a crank-slider mechanism, the first link arm acting as a crank and the slider as a slider; and both the first and second multi-link hinges are toothed multi-link hinges. [9] The synchronous bending adjustment mechanism for furniture according to claim 2, wherein either the input end of the first multi-joint hinge or the sliding body is provided with a first connecting extension, while the other is provided with a first connecting slot, the first connecting extension being placed in the first connecting slot and being able to slide within this slot; either the input end of the second multi-joint hinge or the sliding body is provided with a second connecting extension, while the other is provided with a second connecting slot, the second connecting extension being placed in the second connecting slot and being able to slide within this slot. [10] A sofa comprising a sofa body, a sofa headrest, and the synchronous bending adjustment mechanism for furniture according to any one of claims 1 to 9, wherein the frame is mounted on the sofa body, and the sofa headrest is mounted on the first and second multi-link hinges, respectively; the telescopic drive drives both the first and second multi-link hinges to perform synchronous bending movements under the cooperation of the first synchronous rod and the balancer, thereby extending or retracting the sofa headrest.

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