CN216494448U

CN216494448U - Multi-connecting-rod stretching mechanism for furniture

Info

Publication number: CN216494448U
Application number: CN202123173542.3U
Authority: CN
Inventors: 卢伟
Original assignee: Dongguan Weihong Smart Home Technology Co Ltd
Current assignee: Dongguan Weihong Smart Home Technology Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-05-13
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses a multi-link extension mechanism for furniture, which comprises a multi-link extension unit capable of switching to a first state, a second state or a third state. The multi-connecting-rod extending unit comprises a foot support mechanism, a driving mechanism, a backrest mechanism and an attitude switching auxiliary mechanism; the foot support mechanism is hinged with the driving mechanism from the front of the driving mechanism, and the backrest mechanism is hinged with the driving mechanism from the rear of the driving mechanism; the posture switching auxiliary mechanism is respectively hinged with the foot support mechanism, the driving mechanism and the backrest mechanism, and is also respectively arranged in a linkage way with the foot support mechanism, the driving mechanism and the backrest mechanism; the driving mechanism is matched with the posture switching auxiliary mechanism to link the foot support mechanism and the backrest mechanism to do coordinated motion, so that the multi-link extension unit is switched to a first state, a second state or a third state; to obtain a third gear position adjustment function and save cost.

Description

Multi-connecting-rod stretching mechanism for furniture

Technical Field

The utility model relates to furniture, in particular to a multi-connecting-rod stretching mechanism for furniture.

Background

In sofas, the use of an extension mechanism is not undone to allow the sofa seat to be in a sitting or lying position with a corresponding movement of the extension mechanism to meet the needs of the person.

However, in the existing stretching mechanism, it can only adjust two positions, namely a sitting posture and a lying posture, so that the purchasing of different postures of sofas or chairs by customers is increased, the cost is correspondingly increased, and the requirement of people on more stringent requirements cannot be met.

Accordingly, there is a need for a multi-link extension mechanism for furniture that overcomes one or more of the above-mentioned deficiencies.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multi-link extension mechanism for furniture, which can achieve the three-gear position adjusting function and save the cost.

To achieve the above object, a multi-link extension mechanism for furniture according to the present invention includes a multi-link extension unit switchable to a first state, a second state, or a third state, the multi-link extension unit including a footrest mechanism, a drive mechanism, a backrest mechanism, and a posture switching assist mechanism. The foot support mechanism is hinged with the driving mechanism from the front of the driving mechanism, the backrest mechanism is hinged with the driving mechanism from the rear of the driving mechanism, the posture switching auxiliary mechanism is respectively hinged with the foot support mechanism, the driving mechanism and the backrest mechanism, and the posture switching auxiliary mechanism is also respectively arranged in a linkage manner with the foot support mechanism, the driving mechanism and the backrest mechanism; the driving mechanism is matched with the posture switching auxiliary mechanism to link the foot support mechanism and the backrest mechanism to do coordinated movement, so that the multi-link extension unit is switched to the first state, the second state or the third state.

Preferably, the foot rest mechanism is folded and retracted toward a position close to the driving mechanism when being switched to the first state, the foot rest mechanism extends in a direction away from the driving mechanism when being switched to the second state or the second state, and the foot rest mechanism is in the first state when the driving mechanism is not under the action of an external force.

Preferably, the first state is a sitting posture state, the second state is a leisure posture state, and the third state is a lying posture state.

Preferably, the driving mechanism includes a main link, a front link and a rear link, the upper ends of the front link and the rear link are hinged to the main link, the posture switching auxiliary mechanism includes a first auxiliary link and a second auxiliary link, the front end of the first auxiliary link is hinged to the middle of the front link, the rear end of the first auxiliary link is hinged to the backrest mechanism, the rear end of the second auxiliary link is hinged to the lower end of the rear link, and the middle of the second auxiliary link is hinged to the position of the first auxiliary link between the front end and the rear end of the first auxiliary link.

Preferably, the multi-link extension unit further includes a support rod, a first stabilizing link, a second stabilizing link and a spring, the support rod and the first auxiliary link are arranged side by side, a first end of the first stabilizing link is hinged to a lower end of the front support link, a second end of the first stabilizing link is hinged to a first end of the second stabilizing link, a second end of the second stabilizing link is hinged to a front end of the support rod, a rear end of the support rod is hinged to the first auxiliary link, a hinge of the support rod and the first auxiliary link is located above a hinge of the first auxiliary link and the backrest mechanism, and the spring is connected to both the front support link and the support rod.

Preferably, the front connecting rod is provided with a first sleeving structure which is located below the main connecting rod and adjacent to the main connecting rod, the front end of the supporting rod is provided with a second sleeving structure which is located below the first sleeving structure correspondingly, one end of the spring is sleeved on the first sleeving structure, and the other end of the spring is sleeved on the second sleeving structure.

Preferably, the backrest mechanism includes an upper backrest connecting rod and a lower backrest connecting rod, the upper backrest connecting rod branches into two hinge legs, one of the hinge legs is hinged to the main connecting rod, the other hinge leg is hinged to the rear end of the lower backrest connecting rod, and the front end of the lower backrest connecting rod is hinged to the rear end of the first auxiliary connecting rod.

Preferably, the multi-link extension units are arranged in a left-right alignment and spacing manner, and a power mechanism for providing power for the driving mechanism is arranged between the left multi-link extension unit and the right multi-link extension unit.

Preferably, the power mechanism includes a front tube body, a rear tube body, a driving motor and a driving linkage, the left and right ends of the rear tube body are assembled on the supporting rods in the same side, the driving linkage is arranged in a left-right alignment manner, one end of the driving linkage on the left and right sides is assembled on the supporting rods in the same side, the other end of the driving linkage on the left and right sides is assembled on the main connecting rod in the same side, the left and right ends of the front tube body are assembled on the driving linkage in the same side, and the driving motor is hinged to the front tube body and the rear tube body respectively.

Preferably, the driving linkage includes a first fixing rod fixed to the main link, a second fixing rod fixed to the support rod, a first hinge rod having one end hinged to the first fixing rod, and a second hinge rod having one end hinged to the second fixing rod, the other ends of the first hinge rod and the second hinge rod are hinged to each other, and the front tube body is fixedly connected to the second hinge rod.

Compared with the prior art, the multi-connecting-rod stretching unit also comprises an attitude switching auxiliary mechanism, the attitude switching auxiliary mechanism is respectively hinged with the foot support mechanism, the driving mechanism and the backrest mechanism, and the attitude switching auxiliary mechanism is also respectively arranged in a linkage way with the foot support mechanism, the driving mechanism and the backrest mechanism; the driving mechanism is matched with the posture switching auxiliary mechanism to link the foot support mechanism and the backrest mechanism to do coordinated motion, so that the multi-link extension unit is switched to a first state, a second state or a third state; for example, when the driving mechanism is not acted by external force, the foot rest mechanism, the driving mechanism, the posture switching auxiliary mechanism and the backrest mechanism are respectively in initial positions, so that the multi-link extension mechanism for furniture is in a sitting posture state; when external force acts on the driving mechanism, the driving mechanism transmits power to the foot support mechanism and the backrest mechanism under the coordination of the posture switching auxiliary mechanism, so that the foot support mechanism and the backrest mechanism do corresponding movement, and the multi-connecting-rod stretching mechanism for furniture is in a leisure posture state; when the back strength is continuously applied to the backrest mechanism, the power of the driving mechanism is transmitted to the foot support mechanism and the backrest mechanism in coordination of the posture switching auxiliary mechanism, so that the multi-link stretching mechanism for furniture is in a lying posture state; therefore, the multi-link stretching mechanism for furniture has the three-gear position adjusting function, so that the more critical requirements of customers are met, the purchase of the customers for sofas or chairs with different postures is reduced, and the cost is correspondingly reduced. In addition, still have structural design reasonable and the high advantage of reliability.

Drawings

Fig. 1 is a plan view of a multi-link extension mechanism for furniture according to a first embodiment of the present invention in a sitting position.

Fig. 2 is a plan view of the multi-link stretcher for furniture according to the first embodiment of the present invention in a leisure posture.

Fig. 3 is a plan view of the multi-link stretcher for furniture according to the first embodiment of the present invention in the lying position.

Fig. 4 is a perspective view of a multi-link stretcher for furniture according to a second embodiment of the present invention in a lying posture.

Detailed Description

The preferred embodiments of the present invention will now be described with reference to the accompanying drawings, which are given by way of illustration.

Referring to fig. 1 to 3, the multi-link stretching mechanism 1000 for furniture according to the present invention includes a multi-link stretching unit 100 capable of moving to a sitting posture, a leisure posture or a lying posture, wherein the multi-link stretching unit 100 includes a footrest mechanism 10, a driving mechanism 20, a backrest mechanism 30 and a posture switching auxiliary mechanism 40. The footrest mechanism 10 is hinged with the driving mechanism 20 from the front of the driving mechanism 20, the backrest mechanism 30 is hinged with the driving mechanism 20 from the rear of the driving mechanism 20, the posture switching auxiliary mechanism 40 is respectively hinged with the footrest mechanism 10, the driving mechanism 20 and the backrest mechanism 30, and the posture switching auxiliary mechanism 40 is also respectively arranged in a linkage way with the footrest mechanism 10, the driving mechanism 20 and the backrest mechanism 30; therefore, the driving mechanism 20 is coordinated with the leg rest mechanism 10 and the backrest mechanism 30 by the posture switching support mechanism 40, so that the multi-link extension unit 100 is switched to the sitting posture, the leisure posture or the lying posture. Wherein, the driving mechanism 20 needs to be linked with the footrest mechanism 10 and the backrest mechanism 30 to move in coordination under the action of external force, and the external force source received by the driving mechanism 20 is: since the seat of the furniture is installed at the driving mechanism 20, when a user sits on the seat, an external force is applied to the driving mechanism 20, and under the action of the external force, the driving mechanism 20 is linked with the footrest mechanism 10 and the backrest mechanism 30 to perform a coordinated motion in cooperation with the posture switching auxiliary mechanism 40, so that the multi-link extension unit 100 is switched to a sitting posture state, a leisure posture state or a lying posture state; in addition, as to how many multi-link extension units 100 are mounted on the seat, which is determined by the length of the seat, it will not be described in detail herein. More specifically, the following:

as shown in fig. 1, when the footrest mechanism 10 is switched to the sitting posture, the footrest mechanism 10 is folded and folded toward the position close to the driving mechanism 20, and the driving mechanism 20 is in the sitting posture without being subjected to an external force, that is, when the user is not sitting on the seat, the driving mechanism 20 is not subjected to an external force at this time, so that the footrest mechanism 10 is normally folded and folded relative to the driving mechanism 20, thereby reducing the occupied space in the normal state; meanwhile, in fig. 2 and 3, the footrest mechanism 10 is extended in a direction away from the driving mechanism 20 when switched to the leisure posture state or the lying posture state to meet the functional needs of the user. Specifically, in fig. 1 to 3, the footrest mechanism 10 includes a power input rod 11 and seven links 12 connected in an articulated manner, the seven links 12 and a main link 21 in the driving mechanism 20 together enclose three four-link structures arranged from front to back and with adjacent links connected to each other, a front end of the power input rod 11 is articulated with a rearmost one of the four-link structures, and a rear end of the power input rod 11 is articulated with a first auxiliary link 41 in the posture switching auxiliary mechanism 40, so as to ensure that the driving mechanism 20 drives the seven links 12 to perform corresponding unfolding and folding movements through the power input rod 11 in cooperation with the posture switching auxiliary mechanism 40; of course, the specific structure of the footrest mechanism 10 may be other according to actual needs, and is not limited thereto.

As shown in fig. 1 to 3, the driving mechanism 20 includes a main link 21, a front link 22, and a rear link 23, and upper ends of both the front link 22 and the rear link 23 are hinged to the main link 21. The posture switching assistance mechanism 40 includes a first assistance link 41 and a second assistance link 42, a front end of the first assistance link 41 is hinged to the middle of the front link 22, a rear end of the first assistance link 41 is hinged to the backrest mechanism 30, specifically, to a lower backrest link 32 described below, a rear end of the second assistance link 42 is hinged to a lower end of the rear link 23, and a middle of the second assistance link 42 is hinged to a position of the first assistance link 41 between the front end and the rear end of the first assistance link 41; for example, in fig. 3, the hinge point between the middle portion of the second auxiliary link 42 and the first auxiliary link 41 is P3, the hinge point between the rear end of the first auxiliary link 41 and the backrest mechanism 30 is P1, the hinge point between the front end of the first auxiliary link 41 and the middle portion of the front support link 22 is P2, and P2 is located between P1 and P3, so as to ensure that the driving mechanism 20 smoothly links the footrest mechanism 10 and the backrest mechanism 30 to perform the stretching and retracting movements under the cooperation of the posture switching auxiliary mechanism 40, thereby smoothly switching the multi-link extension mechanism for furniture of the present invention to the sitting posture state, the leisure posture state or the lying posture state. Specifically, in fig. 1 to 3, the multi-link extension unit 100 further includes a support rod 50, a first stabilizer link 60, a second stabilizer link 70, and a spring 80; the support rod 50 is arranged side by side with the first auxiliary link 41, preferably such that the support rod 50 is located inside the first auxiliary link 41, the first end of the first stabilizing link 60 is hinged with the lower end of the front support link 22, the second end of the first stabilizing link 60 is hinged with the first end of the second stabilizing link 70, the second end of the second stabilizing link 70 is hinged with the front end of the support rod 50, the rear end of the support rod 50 is hinged with the first auxiliary link 41 (see P3 in fig. 3), i.e. the hinge joint of the support rod 50 and the first auxiliary link 41 and the hinge joint of the middle part of the second auxiliary link 42 and the first auxiliary link 41 are coincident, the hinge joint of the support rod 50 and the first auxiliary link 41 is located above the hinge joint of the first auxiliary link 41 and the backrest mechanism 30 (see P1 in fig. 3), and the spring 80 is connected to both the front support link 22 and the support rod 50; the design ensures that the driving mechanism 20 is linked with the foot rest mechanism 10 and the backrest mechanism 30 to do smooth unfolding and folding movement. More specifically, in fig. 1 to 3, the front connecting rod 22 is provided with a first nesting structure 221, such as but not limited to a nesting column, located below the main connecting rod 21 and adjacent to the main connecting rod 21, the front end of the supporting rod 50 is provided with a second nesting structure 51, such as but not limited to a nesting column, located below the first nesting structure 221, the front end of the supporting rod 50 is provided with a spring 80, one end of the spring 80 is nested in the first nesting structure 221, and the other end of the spring 80 is nested in the second nesting structure 51, so that the spring 80 is more reliably connected to both the supporting rod 50 and the front connecting rod 22, and the spring 80 is used to ensure the reliability of the sequential adjustment of the furniture multi-link extension mechanism 1000 of the present invention, where the sequential adjustment is: the sitting posture state is switched to the leisure posture state, and then the leisure posture state is switched to the lying posture state, and vice versa, so the utility model is not limited thereto.

As shown in fig. 1 to 3, the backrest mechanism 30 includes an upper backrest link 31 and a lower backrest link 32, the upper backrest link 31 is branched into two hinge legs 311, one hinge leg 311 is hinged to the main link 21, the other hinge leg 311 is hinged to the rear end of the lower backrest link 32, and the front end of the lower backrest link 32 is hinged to the rear end of the first auxiliary link 41, so as to ensure that the driving mechanism 20 is linked to the backrest mechanism 30 to perform a coordinated stretching and retracting movement under the cooperation of the first auxiliary link 41 and the second auxiliary link 42, and simultaneously linked to the footrest mechanism 10 to perform a coordinated stretching and retracting movement, thereby achieving the purpose of smoothly switching the multi-link stretching mechanism 1000 for furniture to the sitting posture state, the leisure posture state or the lying posture state. Since the back upper link 31 is to provide a back function, it slantly protrudes rearward and upward from the main link 21.

Referring to fig. 4, the structure of the multi-link extension mechanism 1000' for furniture according to the present invention is substantially the same as the structure of the multi-link extension mechanism 1000 for furniture according to the first embodiment, except that the former is electrically operated and the latter is manually operated, and the following difference is explained:

(1) in the second embodiment, the multi-link extension units 100 are arranged in a left-right alignment and spaced manner, and the power mechanism 200 for powering the driving mechanism 20 is installed between the left multi-link extension unit 100 and the right multi-link extension unit 100, so that the external force applied to the driving mechanism 20 is provided by the power mechanism 200 by introducing the power assisting mechanism 200, and the external force applied to the driving mechanism 20 by a user sitting on the seat is not required, thereby making the state adjustment of the multi-link extension mechanism 1000' for furniture of the present invention more convenient and faster. Specifically, in fig. 4, the power mechanism 200 includes a front tube 210, a rear tube 220, a driving motor 230 and a driving linkage 240; the left and right ends of the rear pipe body 220 are assembled with the support rods 50 in the same side, so that the rear pipe body 220, the left support rod 50 and the right support rod 50 are fixed into a whole; the driving linkage 240 is arranged in a left-right aligned and spaced manner, one end of the driving linkage 240 on the left side and the right side is assembled on the supporting rod 50 in the same side, and the other end of the driving linkage 240 on the left side and the right side is assembled on the main connecting rod 21 in the same side; the left end and the right end of the front tube 210 are assembled on the driving linkage 240 in the same side, and the driving motor 230 is respectively hinged on the front tube 210 and the rear tube 220, so that in the working process of the driving motor 230, the purpose of applying external force to the driving mechanism 20 is achieved through the matching of the front tube 210 and the driving linkage 240, and the driving mechanism 20 under the external force is linked with the footrest mechanism 10 and the backrest mechanism 30 to do coordinated stretching and retracting movement. For example, in fig. 4, the driving linkage 240 includes a first fixing rod 241 fixed to the main link 21, a second fixing rod 242 fixed to the support rod 50, a first hinge rod 243 having one end hinged to the first fixing rod 241, and a second hinge rod 244 having one end hinged to the second fixing rod 242; the other ends of the first hinge rod 243 and the second hinge rod 244 are hinged to each other, and the front tube body 210 is fixedly connected to the second hinge rod 244; further, the driving mechanism 20 is more smoothly linked with the leg rest mechanism 10 and the backrest mechanism 30 to perform the coordinated unfolding and folding movement under the external force applied by the power mechanism 200, thereby realizing the smoothness of switching the furniture multi-link extending mechanism 1000' to the three states.

Except for the above differences, the multi-link extension mechanism 1000 for furniture of the first embodiment is the same, and therefore, will not be described in detail.

Compared with the prior art, the multi-link extension unit 100 further comprises an attitude switching auxiliary mechanism 40, the attitude switching auxiliary mechanism 40 is respectively hinged with the footrest mechanism 10, the driving mechanism 20 and the backrest mechanism 30, and the attitude switching auxiliary mechanism 40 is also respectively arranged in linkage with the footrest mechanism 10, the driving mechanism 2 and the backrest mechanism 30; the driving mechanism 20 is cooperated with the posture switching auxiliary mechanism 40 to drive the footrest mechanism 10 and the backrest mechanism 30 to move in coordination, so that the multi-link extension unit 100 is switched to a sitting posture state, a leisure posture state or a lying posture state; for example, when the driving mechanism 20 is not acted by external force, the footrest mechanism 10, the driving mechanism 20, the posture switching auxiliary mechanism 40 and the backrest mechanism 30 are all at initial positions (which may also be referred to as normal positions), so that the multi-link extension mechanism 1000 (1000') for furniture of the present invention is in a sitting position; when an external force acts on the driving mechanism 20, for example, the external force applied to the driving mechanism 20 by the user sitting on the seat or the external force applied to the driving mechanism 20 by the power mechanism 200, the driving mechanism 20 transmits the power to the footrest mechanism 10 and the backrest mechanism 30 under the coordination of the posture switching auxiliary mechanism 40, so that the footrest mechanism 10 and the backrest mechanism 30 perform corresponding movements, thereby enabling the multi-link extension mechanism 1000 (1000') for furniture of the present invention to be in a leisure posture state; when the back force is continuously applied to the backrest mechanism 30, i.e. driven by the user, of course, the power mechanism 200 can also be continuously driven, so that the power received by the driving mechanism 20 is transmitted to the footrest mechanism 10 and the backrest mechanism 30 in coordination with the posture switching auxiliary mechanism 40, and the multi-link extension mechanism 1000 (1000') for furniture of the present invention is in the lying posture state; therefore, the multi-link extension mechanism 1000 (1000') for furniture of the present invention has a three-gear position adjustment function to satisfy more critical requirements of customers, and simultaneously, the purchase of the customers for sofas or chairs with different postures is reduced, and accordingly, the cost is reduced. In addition, still have structural design reasonable and the high advantage of reliability.

It should be noted that the direction indicated by the arrow a in the drawings is from front to back, the direction indicated by the arrow B in the drawings is from top to bottom, and the direction indicated by the arrow C in the drawings is from left to right. The above description is made with the sitting posture as the first state, the leisure posture as the second state, and the lying posture as the third state, but the first state, the second state, and the third state may be other states, and thus the description is not limited thereto.

The above disclosure is only a preferred embodiment of the present invention, which is convenient for those skilled in the art to understand and implement, and certainly not to limit the scope of the present invention, therefore, the present invention is not limited by the claims and their equivalents.

Claims

1. A multi-link extension mechanism for furniture comprises a multi-link extension unit capable of being switched to a first state, a second state or a third state, wherein the multi-link extension unit comprises a foot support mechanism, a driving mechanism and a backrest mechanism, the foot support mechanism is hinged with the driving mechanism from the front of the driving mechanism, and the backrest mechanism is hinged with the driving mechanism from the rear of the driving mechanism; the driving mechanism is matched with the posture switching auxiliary mechanism to link the foot support mechanism and the backrest mechanism to do coordinated movement, so that the multi-link extension unit is switched to the first state, the second state or the third state.

2. The multi-link extension mechanism for furniture according to claim 1, wherein the footrest mechanism is folded and folded toward the driving mechanism when switched to the first state, and is extended in a direction away from the driving mechanism when switched to the second state or the second state, and is in the first state when the driving mechanism is not subjected to an external force.

3. The multi-link stretcher for furniture according to claim 1 or 2, wherein the first state is a sitting posture state, the second state is a leisure posture state, and the third state is a lying posture state.

4. The multi-link extension mechanism for furniture according to claim 1, wherein the driving mechanism includes a main link, a front link and a rear link, upper ends of both the front link and the rear link are hinged to the main link, the posture switching assistance mechanism includes a first auxiliary link, a front end of which is hinged to a middle portion of the front link, a rear end of which is hinged to the backrest mechanism, a rear end of which is hinged to a lower end of the rear link, and a second auxiliary link, a middle portion of which is hinged to a position of the first auxiliary link between the front end and the rear end of the first auxiliary link.

5. The multi-link extension mechanism for furniture according to claim 4, wherein the multi-link extension unit further comprises a support rod, a first stabilizer link, a second stabilizer link and a spring, the support rod is arranged side by side with the first auxiliary link, a first end of the first stabilizer link is hinged to a lower end of the front support link, a second end of the first stabilizer link is hinged to a first end of the second stabilizer link, a second end of the second stabilizer link is hinged to a front end of the support rod, a rear end of the support rod is hinged to the first auxiliary link, a hinge of the support rod and the first auxiliary link is located above a hinge of the first auxiliary link and the backrest mechanism, and the spring is connected to both the front support link and the support rod.

6. The multi-link extension mechanism for furniture according to claim 5, wherein the front link is provided with a first nesting structure located below and adjacent to the main link, the front end of the support rod is provided with a second nesting structure located below the first nesting structure, one end of the spring is nested in the first nesting structure, and the other end of the spring is nested in the second nesting structure.

7. The multi-link extension mechanism for furniture according to claim 4, wherein the backrest mechanism comprises an upper backrest link and a lower backrest link, the upper backrest link being branched into two hinge legs, one of the hinge legs being hinged to the main link, the other of the hinge legs being hinged to a rear end of the lower backrest link, a front end of the lower backrest link being hinged to a rear end of the first auxiliary link.

8. The multi-link extension mechanism for furniture according to claim 5, wherein the multi-link extension units are arranged in a left-right aligned spaced-apart arrangement, and a power mechanism for powering the drive mechanism is provided between the left multi-link extension unit and the right multi-link extension unit.

9. The multi-link extension mechanism for furniture according to claim 8, wherein the power mechanism comprises a front tube, a rear tube, a driving motor and a driving linkage, wherein the left and right ends of the rear tube are assembled to the supporting rods in the same side, the driving linkage is arranged in a left-right alignment and spaced arrangement, one end of the driving linkage on the left and right sides is assembled to the supporting rod in the same side, the other end of the driving linkage on the left and right sides is assembled to the main connecting rod in the same side, the left and right ends of the front tube are assembled to the driving linkage in the same side, and the driving motor is respectively hinged to the front tube and the rear tube.

10. The multi-link extension mechanism for furniture according to claim 9, wherein the driving linkage includes a first fixing rod fixed to the main link, a second fixing rod fixed to the support rod, a first hinge rod having one end hinged to the first fixing rod, and a second hinge rod having one end hinged to the second fixing rod, the first hinge rod and the second hinge rod having the other ends hinged to each other, and the front tube body is fixedly connected to the second hinge rod.