CN217408294U - Dual-drive-source mechanical stretching device - Google Patents

Abstract

The application relates to the technical field of furniture, in particular to a dual-drive-source mechanical stretching device which comprises one or more groups of parallel stretching mechanisms, wherein each stretching mechanism comprises a base, a first mounting piece, a first connecting rod assembly, a second mounting piece, a second connecting rod assembly, a leg rest assembly and a backrest assembly, wherein the first connecting rod assembly and the second mounting piece are rotatably connected between the base and the first mounting piece; the extension mechanism comprises a first driving piece for driving the first mounting piece to swing; the leg rest assembly comprises an input part and a feedback part, the extension mechanism comprises a second driving part and a linkage rod, one end of the second driving part is connected to the input part, and the other end of the second driving part is connected to the first installation part or the second linkage rod assembly; the input part and the feedback part are respectively positioned at two sides of a rotation point of the leg rest assembly, one end of the linkage rod is rotationally connected to the feedback part, and the other end of the linkage rod is rotationally connected to the first mounting piece or the second connecting rod assembly; this application can control the gesture of sofa in a flexible way through two driving pieces.

Description

Dual-drive-source mechanical stretching device

Technical Field

The application relates to the technical field of functional furniture, in particular to a dual-drive-source mechanical stretching device.

Background

The existing functional sofa can realize conversion of various postures, generally comprises three postures, namely a sitting posture, a TV posture and a lying posture, wherein the sitting posture is a state that a leg rest part of the sofa is contracted and a backrest is not turned down, the TV posture is a state that the leg rest of the sofa is forwards and upwards unfolded but the backrest is still not turned down by a large margin, and the lying posture is a state that the leg rest of the sofa is forwards and upwards unfolded and the backrest is turned down by a large margin.

The mechanical stretching device of the functional sofa at present can only allow the sitting posture, the TV posture and the lying posture to be carried out in sequence, for example, in the Chinese utility model patent with the application number of 202110556148.3, the functional sofa stretching device with good support property explains that the functional sofa needs to be changed into the TV posture from the sitting posture to reach the lying posture state, and has great limitation.

SUMMERY OF THE UTILITY MODEL

In order to improve the state switching flexibility of the functional sofa, the application provides a double-drive-source mechanical stretching device.

The application provides a dual drive source mechanical stretching device adopts following technical scheme:

a dual-drive-source mechanical stretching device comprises one or more groups of parallel stretching mechanisms, wherein each stretching mechanism comprises a base, a first mounting piece, a first connecting rod assembly, a second mounting piece, a second connecting rod assembly, a leg rest assembly and a backrest assembly, the first connecting rod assembly is rotatably connected between the base and the first mounting piece, the second connecting rod assembly is rotatably connected between the first mounting piece and the second mounting piece, the leg rest assembly is rotatably connected to the second mounting piece, and the backrest assembly is connected with the first mounting piece and the base; the stretching mechanism further comprises a first driving piece arranged between the base and the first mounting piece, and the first driving piece is used for driving the first mounting piece to swing relative to the base; the leg rest assembly comprises an input part, the extension mechanism further comprises a second driving part, one part of the second driving part is rotationally connected with the input part, and the other part of the second driving part is rotationally connected with the first mounting part or the second connecting rod assembly; the leg rest assembly further comprises a feedback part, the input part and the feedback part are respectively located on two opposite sides of a rotation point of the leg rest assembly relative to the second installation part, the extension mechanism further comprises a linkage rod, one part of the linkage rod is rotatably connected to the feedback part, and the other part of the linkage rod is rotatably connected to the first installation part or the second connecting rod assembly.

By adopting the technical scheme, the first mounting piece, the second mounting piece arranged on the first mounting piece and the leg rest component are driven to move forwards through the first driving piece, so that the backrest component can be driven to act, and the backrest can be turned over; the bracket assembly is driven to open forwards and upwards through the second driving piece, and meanwhile, the second mounting piece can be linked to move forwards slowly; and the motion of first driving piece and second driving piece is mutual noninterference, so the user can be according to self demand, simultaneously or respectively control two driving piece actions to make the sofa have more forms and can present, improved stretching device's flexibility.

In addition, during the process that the second driving piece drives the leg rest component to turn forwards and upwards and open, the state of the input part swings forwards and upwards, and the feedback part swings backwards and downwards, the linkage rod is pushed backwards, theoretically, no matter the rear end of the linkage rod is connected with the first installation part or the second connecting rod assembly, the backwards pushing force applied to the linkage rod drives the first installation part to swing backwards and upwards relative to the second installation part, but the first installation part is locked with the base at the moment, so that the feedback part can be used for driving the linkage rod to move backwards and downwards, under the action of the reaction force, the second mounting piece swings forwards and downwards relative to the first mounting piece, the cushion of the sofa is connected with the second mounting piece, the sofa seat cushion can move forwards and downwards by a small amount in the opening process of the leg rest component, so that the body posture of a user can be more easily and scientifically kept when the sofa is in a TV posture state.

Optionally: the other part of the second driving piece is rotatably connected with the first mounting piece.

Through adopting above-mentioned technical scheme, provide the concrete connection structure mode of a second driving piece.

Optionally, a first fixed beam is fixed on the first mounting member, and the second driving member and the first driving member are both mounted on the first fixed beam.

Through adopting above-mentioned technical scheme, save the material and the position that are used for installing two driving pieces.

Optionally: the bracket assembly is arranged far away from the joint of the first fixed beam and the first mounting piece.

By adopting the technical scheme, firstly, it is noted that in the prior art, as only one driving member is usually adopted in the extension device, and the driving member is usually an electric cylinder, the extension stroke of the driving member needs to be longer, and particularly when the driving member moves to the vicinity of the maximum stroke, the extension stability of the driving member is poor, and the driving member is easy to shake; the application is changed into the combination of two driving pieces, so that the stroke requirement of each driving piece can be reduced, and the probability of jitter and poor stability of each driving piece in the motion process is reduced; in the application, the stroke ratio of the first driving piece to the second driving piece can be further adjusted by arranging the joint of the first fixing beam and the first mounting piece at a specific position, namely the arrangement enables the stroke of the second driving piece to be longer and the stroke of the first driving piece to be shorter; in the practical process, the back of the user is abutted against the backrest, the force applied to the backrest is usually large, the first driving piece needs to do work greatly and shake easily, the force applied to the leg rest assembly by the foot of the user is small, the second driving piece needs to do work less and shake hardly occurs; the method and the device have the advantages that the stroke of the first driving piece is shortened to reduce the jitter probability, so that the defect of large work done by the first driving piece is overcome, and meanwhile, the second driving piece originally does little work, so that even if the stroke is larger, large jitter is not easy to occur; finally, through the coordination, the operation of the whole structure can be more stably balanced.

Optionally: the stretching mechanisms are provided with two groups, and the first fixed beams connected to each first mounting piece are integrally arranged.

By adopting the technical scheme, the first fixed beam is not only used for providing the installation positions for the two driving pieces, but also used for improving the connection strength and the movement synchronism of the two groups of stretching mechanisms.

Optionally: two fixedly connected with second fixed beam between the input part, and second driving piece rotates and connects in second fixed beam.

Through adopting above-mentioned technical scheme, the second fixed beam also is used for not only providing the mounted position for the second driving piece, still is used for improving the joint strength and the motion synchronism of two sets of extension mechanisms.

Optionally: the first mounting part is positioned on one side of the base close to the other group of stretching mechanisms, and the second mounting part is positioned on one side of the first mounting part close to the other group of stretching mechanisms.

Through adopting above-mentioned technical scheme, reduce base, first installed part, second installed part to and the mutual interference of relevant adapting unit.

Optionally: two fixedly connected with third fixed beam between the base, and first driving piece rotates and connects in third fixed beam.

Through adopting above-mentioned technical scheme, the third fixed beam also is used for not only providing the mounted position for first driving piece, still is used for improving the joint strength and the motion synchronism of two sets of extension mechanisms.

Optionally: and the other part of the linkage rod is rotationally connected with the second linkage assembly.

Through adopting above-mentioned technical scheme, a connected mode of link rod is provided.

Optionally: the driving route of the first driving piece and the driving route of the second driving piece are positioned in the same plane.

Through adopting above-mentioned technical scheme, reduce the moment of torsion of two driving piece application of force processes to improve the stability of extension device operation.

In summary, the present application has the following beneficial effects: the sofa is provided with the first driving piece and the second driving piece which do not interfere with each other in movement, the first driving piece can control the backrest to turn over and swing, and the second driving piece can control the leg rest assembly to expand outwards, so that a user can control the two driving pieces to act simultaneously or respectively according to the requirement of the user, so that the sofa has more forms to be presented, and the flexibility of the stretching device is improved;

it should be noted that the second driving member can also drive the second mounting member to move forward a small amount when controlling the extension of the leg rest assembly, and the cushion of the sofa is fixed to the second mounting member, so that the leg rest assembly can drive the cushion of the sofa to move forward and downward while extending outward, which means that the extension device of the present application can provide a more comfortable and ergonomic support and support for the user in the TV posture state.

Drawings

FIG. 1 is a schematic structural view of the first embodiment, showing the structure of the stretching device in a TV posture state;

fig. 2 is a view showing a connection relationship between the base and the first mounting member in fig. 1 according to the first embodiment, in which the first mounting member is shown only in both end portions;

FIG. 3 is a diagram of the connection relationship between the base and the first and second mounting members in FIG. 1 according to the first embodiment;

FIG. 4 is a schematic structural diagram of the first embodiment, which shows the structure in any posture;

fig. 5 is an enlarged schematic view at a in fig. 4 of the first embodiment, showing a positional relationship of the input portion and the feedback portion.

In the figure, 100, base; 110. a spacing pin; 200. a first mounting member; 300. a first link assembly; 310. a front support bar; 311. a limiting groove; 320. a front connecting rod; 330. a rear support bar; 340. a rear connecting rod; 350. a first limit connecting rod; 360. a second limit connecting rod; 400. a second mount; 500. a second linkage assembly; 510. a front link; 520. a rear connecting rod; 600. a leg rest assembly; 610. a first leg rest rod; 620. a second footrest bar; 630. a third leg rest rod; 640. a fourth footrest rod; 650. a first footrest; 660. a second footrest; 670. an input section; 680. a feedback section; 690. a rotating part; 700. a backrest assembly; 710. a U-shaped frame; 720. a backrest connector; 730. a backrest connecting rod; 740. a first transfer lever; 750. a second dowel bar; 800. a first fixed beam; 810. a second fixed beam; 820. a third fixed beam; 830. a first driving member; 840. a second driving member; 850. a linkage rod.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

Example 1:

referring to fig. 1, a dual drive source mechanical extension apparatus includes one or more sets of parallel extension mechanisms, for example, two sets of extension mechanisms, including a base 100, a first mounting member 200, a first link assembly 300 rotatably connected between the base 100 and the first mounting member 200, a second mounting member 400, a second link assembly 500 rotatably connected between the first mounting member 200 and the second mounting member 400, a leg rest assembly 600 rotatably connected to the second mounting member 400, and a backrest assembly 700 connected to both the first mounting member 200 and the base 100;

fixedly connected with a first fixed beam 800 between relative first installed part 200 in two sets of extension mechanisms, fixedly connected with second fixed beam 810 between the relative bracket subassembly 600, fixedly connected with a third fixed beam 820 between the relative base 100, three fixed beams are by preceding order of arranging to the back: a second fixed beam 810, a first fixed beam 800, and a third fixed beam 820, wherein all references to the front-to-back relationship described herein refer to the extension device being installed in the sofa-back front-to-back relationship, i.e., the leg rest assembly 600 is the front side of the extension device and the backrest assembly 700 is the back side of the extension device;

the base 100 is adapted to be secured within a sofa frame, and the extending mechanism further comprises a first driving member 830 and a second driving member 840, each of the first driving member 830 and the second driving member 840 being optionally, but not limited to, an electric cylinder; the first driving member 830 is installed between the base 100 and the first mounting member 200, specifically, one end of the first driving member 830 is rotatably connected to the first fixing beam 800, and the other end is rotatably connected to the third fixing beam 820, the first driving member 830 is used for driving the first mounting member 200, the second mounting member 400 and the leg rest assembly 600 to synchronously swing forward, and simultaneously driving the backrest assembly 700 to move, so that the backrest connected to the backrest assembly 700 swings downward; one end of the second driving member 840 is rotatably connected to the first fixing beam 800, the other end is rotatably connected to the second fixing beam 810, the second driving member 840 is used for driving the leg rest assembly 600 to be turned forwards and opened, and the leg rest connected to the leg rest assembly 600 can upwards support the legs and feet of the user.

Referring to fig. 2 and 3, the base 100, the first mounting member 200, and the second mounting member 400 are each generally elongated; the first link assembly 300 includes a front support rod 310 and a front link rod 320, a lower end of the front support rod 310 is rotatably coupled to a front end of the base 100, an upper end of the front link rod 320 is rotatably coupled to an upper end of the front support rod 310, and a lower end of the front link rod 320 is rotatably coupled to a front end of the first mounting member 200; a limit pin 110 is fixed at the front end of the base 100, the limit pin 110 is arranged close to the front support rod 310, a limit groove 311 is formed in the peripheral wall of the front support rod 310, the limit pin 110 is in sliding fit with the limit groove 311, and the limit groove 311 can limit the excessive rotation of the front support rod 310;

the first link assembly 300 further includes a rear support rod 330 and a rear link 340, a lower end of the rear support rod 330 is rotatably connected to a rear position of the middle section of the base 100, an upper end of the rear link 340 is rotatably connected to an upper end of the rear support rod 330, and a lower end of the rear link 340 is rotatably connected to a rear end of the first mounting member 200;

the first connecting rod assembly 300 further comprises a first limit connecting rod 350 and a second limit connecting rod 360, the front end of the first limit connecting rod 350 is rotatably connected to the middle section of the front connecting rod 320, the rear end of the first limit connecting rod 350 is rotatably connected to the upper end of the rear supporting rod 330, and the connecting point is higher than the connecting point of the rear supporting rod 330 and the rear connecting rod 340; the front end of the second limit link 360 is rotatably connected to the middle section of the first limit link 350, and the rear end thereof is rotatably connected to the middle section of the rear connecting rod 340.

The second link assembly 500 includes a front link 510 and a rear link 520, the front link 510 is rotatably coupled at a lower end thereof to the front end of the first mounting part 200 and at an upper end thereof to the second mounting part 400, the rear link 520 is rotatably coupled at a lower end thereof to the rear end of the first mounting part 200 and at an upper end thereof to the second mounting part 400, and a connection point of the front link 510 to the second mounting part 400 is located more forward than a connection point of the rear link 520 to the second mounting part 400.

The backrest module 700 includes a U-shaped frame 710 fixed to the rear end of the second mounting member 400, the backrest module 700 further includes a backrest connector 720, a backrest connecting rod 730, a first force transmission rod 740, and a second force transmission rod 750, the lower end of the backrest connector 720 is rotatably connected to the first upper end of the U-shaped frame 710, the upper end of the backrest connector 720 is used for mounting the backrest, the upper end of the first force transmission rod 740 is rotatably connected to the second upper end of the U-shaped frame 710, and the backrest connecting rod 730 is rotatably connected between the first force transmission rod 740 and the backrest connecting rod 720; the upper end of the second dowel 750 is rotatably connected to the lower end of the first dowel 740, and the lower end of the second dowel 750 is rotatably connected to the rear end of the base 100.

Referring to fig. 4 and 5, the leg rest assembly 600 includes a first leg rest rod 610 and a second leg rest rod 620, and upper ends of the first leg rest rod 610 and the second leg rest rod 620 are rotatably connected to a front end of the second mounting member 400; the leg rest assembly 600 further comprises a third leg rest rod 630 and a fourth leg rest rod 640, wherein one end of the third leg rest rod 630 is rotatably connected to the lower end of the first leg rest rod 610, and one end of the fourth leg rest rod 640 is rotatably connected to the lower end of the second leg rest 660; the footrest assembly 600 further comprises a first footrest 650 and a second footrest 660, the other end of the third footrest shaft 630 is rotatably connected to the first footrest 650, and the other end of the fourth footrest is also rotatably connected to the first footrest 650; two tentacles are arranged on the second footrest 660 and are respectively and rotatably connected to the third leg rest rod 630 and the fourth leg rest rod 640; the leg rest assembly 600 forms a plurality of four-bar structures, and the motion path is unique;

the second footrest rod 620 comprises an input part 670, a feedback part 680 and a rotating part 690, the second footrest rod 620 is rotatably connected with the second mounting piece 400 through the rotating part 690, the input part 670 and the feedback part 680 are positioned at two opposite sides of the rotating part 690, and the third fixing beam 820 is fixed to the input part 670;

the stretching mechanism further comprises a linkage rod 850, the front end of the linkage rod 850 is rotatably connected to the feedback part 680, and the other end of the linkage rod 850 is rotatably connected to the middle section of the rear connecting rod 520 of the first mounting part 200 or the second connecting rod assembly 500; when the second driving member 840 drives the leg rest assembly 600 to flip forward and upward and open, the input portion 670 swings forward and upward, and the feedback portion 680 swings backward and downward, so the linkage rod 850 receives a backward pushing force, theoretically, no matter the rear end of the linkage rod 850 is connected to the first mounting member 200 or the second linkage assembly 500, the backward pushing force received by the linkage rod 850 will drive the first mounting member 200 to swing backward and upward relative to the second mounting member 400, but at this time, the first mounting member 200 is in a state of being locked with the base 100, so under the action of a reaction force, the second mounting member 400 swings forward and downward relative to the first mounting member 200, and the seat cushion of the sofa is connected to the second mounting member 400, which is equivalent to that when the leg rest assembly 600 is opened, the seat cushion of the sofa can move forward and downward a small amount, so that when the sofa is in a TV posture state, the body posture of the user can be more easily and scientifically realized.

In another embodiment of the present application, a fourth fixed beam is further fixed between the opposite rear links 520, and an end of the second driving member 840 is connected to the fourth fixed beam, not connected to the first fixed beam 800; or the fourth fixed beam is fixed between the opposite two front links 510.

In another embodiment of the present application, the rear end of linkage bar 850 is pivotally connected to first mount 200.

The principle of the embodiment is as follows: the first driving member 830 drives the first mounting member 200, and the second mounting member 400 and the leg rest assembly 600 arranged on the first mounting member 200 to move forward, so as to drive the backrest assembly 700 to act, and realize the turnover of the backrest; the leg rest assembly 600 is driven by the second driving piece 840 to be opened forwards and upwards, and meanwhile, the second mounting piece 400 can be linked to move forwards slowly; and the movement of the first driving member 830 and the second driving member 840 are not interfered with each other, so that the user can control the two driving members to act simultaneously or respectively according to the self-demand, thereby enabling the sofa to have more forms and improving the flexibility of the stretching device.

Furthermore, the rotational connection of the two parts described in this application may optionally be achieved by riveting with rivets.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A dual-drive-source mechanical stretching device is characterized in that: the folding chair comprises one or more groups of parallel extension mechanisms, wherein each extension mechanism comprises a base (100), a first mounting part (200), a first connecting rod assembly (300) rotatably connected between the base (100) and the first mounting part (200), a second mounting part (400), a second connecting rod assembly (500) rotatably connected between the first mounting part (200) and the second mounting part (400), a leg rest assembly (600) rotatably connected to the second mounting part (400), and a backrest assembly (700) connected with the first mounting part (200) and the base (100); the stretching mechanism further comprises a first driving piece (830) arranged between the base (100) and the first mounting piece (200), and the first driving piece (830) is used for driving the first mounting piece (200) to swing relative to the base (100); the leg rest assembly (600) comprises an input part (670), the extension mechanism further comprises a second driving part (840), one part of the second driving part (840) is rotatably connected with the input part (670), and the other part of the second driving part is rotatably connected with the first mounting part (200) or the second connecting rod assembly (500); the leg rest assembly (600) further comprises a feedback part (680), the input part (670) and the feedback part (680) are respectively positioned at two opposite sides of a rotation point of the leg rest assembly (600) relative to the second mounting part (400), the extension mechanism further comprises a linkage rod (850), one part of the linkage rod (850) is rotationally connected to the feedback part (680), and the other part of the linkage rod is rotationally connected to the first mounting part (200) or the second connecting rod assembly (500).

2. The dual drive source mechanical spreader of claim 1, wherein: the other part of the second driving piece (840) is rotatably connected with the first mounting piece (200).

3. The dual drive source mechanical spreader of claim 2, wherein: and a first fixing beam (800) is fixed on the first mounting piece (200), and the second driving piece (840) and the first driving piece (830) are both arranged on the first fixing beam (800).

4. A dual drive source mechanical extender device in accordance with claim 3 further characterized by: the junction of the first fixed beam (800) and the first mounting piece (200) is arranged far away from the leg rest assembly (600).

5. A dual drive source mechanical extender device in accordance with claim 3 further characterized by: the extension mechanisms are provided with two groups, and the first fixed beams (800) connected to each first mounting piece (200) are integrally arranged.

6. The dual drive source mechanical spreader of claim 5, wherein: a second fixed beam (810) is fixedly connected between the two input parts (670), and a second driving part (840) is rotatably connected to the second fixed beam (810).

7. The dual drive source mechanical spreader of claim 5, wherein: the first mounting member (200) is located on the side of the base (100) adjacent the other set of extension mechanisms and the second mounting member (400) is located on the side of the first mounting member (200) adjacent the other set of extension mechanisms.

8. The dual drive source mechanical spreader of claim 5, wherein: a third fixed beam (820) is fixedly connected between the two bases (100), and the first driving piece (830) is rotatably connected to the third fixed beam (820).

9. The dual drive source mechanical spreader of claim 1, wherein: another portion of the linkage rod (850) is rotatably connected to the second linkage assembly (500).

10. The dual drive source mechanical spreader of claim 1, wherein: the driving route of the first driving piece (830) and the driving route of the second driving piece (840) are positioned in the same plane.

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