阅读说明：本技术 沙发机械伸展装置 (Sofa mechanical stretching device ) 是由 陈俊 郭宗峰 潘自流 沈郭明 毛磊 邬家浩 陈小丽 于 2020-07-28 设计创作，主要内容包括：本发明公开了一种沙发机械伸展装置,包括底座组件、搁腿组件、座椅组件、靠背组件和电动推杆；座椅组件包括座轨、锁杆、前连杆、三角转板、摆动连杆、后连杆和支撑连杆；搁腿组件包括第一连杆、第二连杆、第三连杆、第四连杆、驱动杆和搁腿板；第一连杆的前端铰接于座轨的前端靠后部位,后端与第二连杆的后端铰接,第二连杆的前端与搁脚板的上端铰接,搁脚板的中部与第三连杆的前端铰接,第三连杆的后端与第四连杆的后端铰接,第四连杆的前端与座轨的前端铰接,驱动杆的后端铰接于摆动连杆的中间部位,前端与第一连杆的中间部位铰接；电动推杆的后端铰接于底座组件,前端活塞杆与三角转板连接。本发明具有结构简单、紧凑的特点。(The invention discloses a mechanical sofa stretching device, which comprises a base assembly, a leg rest assembly, a seat assembly, a backrest assembly and an electric push rod, wherein the base assembly is fixed on the base assembly; the seat component comprises a seat rail, a lock rod, a front connecting rod, a triangular rotating plate, a swinging connecting rod, a rear connecting rod and a supporting connecting rod; the leg rest assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a driving rod and a leg rest plate; the front end of the first connecting rod is hinged to the rear part of the front end of the seat rail, the rear end of the first connecting rod is hinged to the rear end of the second connecting rod, the front end of the second connecting rod is hinged to the upper end of the footrest, the middle of the footrest is hinged to the front end of the third connecting rod, the rear end of the third connecting rod is hinged to the rear end of the fourth connecting rod, the front end of the fourth connecting rod is hinged to the front end of the seat rail, the rear end of the driving rod is hinged to the middle part of the swinging connecting rod, and the front end of the driving rod is hinged to the middle part of the first connecting rod; the rear end of the electric push rod is hinged to the base assembly, and a front end piston rod is connected with the triangular rotating plate. The invention has the characteristics of simple and compact structure.)

1. A sofa mechanical stretching device is characterized in that: comprises a base component, a leg rest component, a seat component, a backrest component and an electric push rod;

the base component comprises two outer mounting plates which are arranged in parallel, a supporting rod arranged between the two outer mounting plates and an inner mounting plate which is arranged on the supporting rod and is positioned at the inner side of the outer mounting plates;

the seat component comprises a seat rail, a lock rod, a front connecting rod, a triangular rotating plate, a swinging connecting rod, a rear connecting rod and a supporting connecting rod; the rear end of the swing connecting rod is hinged to the rear end of the inner mounting plate, the middle part of the swing connecting rod is matched with the inner mounting plate in a vertically sliding manner, the front end of the swing connecting rod is hinged to the middle part of the lock rod, the upper end of the lock rod is hinged to the rear part of the front end of the seat rail, the lower end of the lock rod is hinged to the front end of the front connecting rod, the rear end of the front connecting rod is hinged to the rear end angle of the triangular rotating plate, the upper end angle of the triangular rotating plate is hinged to the front end of the inner mounting plate, the front end of the support connecting rod abuts against the bottom wall of the swing connecting rod, the middle part of the support connecting rod is hinged to the front part of the rear end of the swing;

the leg placing assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a driving rod and a leg placing plate; the front end of the first connecting rod is hinged to the rear part of the front end of the seat rail, the rear end of the first connecting rod is hinged to the rear end of the second connecting rod, the front end of the second connecting rod is hinged to the upper end of the footrest, the middle of the footrest is hinged to the front end of the third connecting rod, the rear end of the third connecting rod is hinged to the rear end of the fourth connecting rod, the front end of the fourth connecting rod is hinged to the front end of the seat rail, the rear end of the driving rod is hinged to the middle part of the swinging connecting rod, and the front end of the driving rod is hinged to the middle part of the first connecting rod;

the backrest assembly is hinged with the rear end of the seat rail and the rear end of the swinging connecting rod;

the rear end of the electric push rod is hinged to the base assembly, and the front end piston rod is connected with the triangular rotating plate and can drive the triangular rotating plate to rotate around a hinged point of the triangular rotating plate and the inner mounting plate.

2. The sofa mechanical stretching device according to claim 1, wherein: and a first guide pin rod for the fourth connecting rod to abut against is arranged on the second connecting rod.

3. The sofa mechanical stretching device according to claim 1, wherein: the leg placing component further comprises a middle leg placing plate, and the middle leg placing plate is arranged on the third connecting rod.

4. The sofa mechanical stretching device according to claim 1, wherein: the middle part of the swing connecting rod is provided with a second guide pin, and the inner mounting plate is provided with a guide groove for matching the second guide pin.

5. The sofa mechanical stretching device according to claim 1, wherein: the front end of the inner mounting plate is provided with a supporting pin for supporting the swinging connecting rod and the driving connecting rod.

6. The sofa mechanical stretching device according to claim 1, wherein: the rear end of the electric push rod is hinged with a first connecting rod and is arranged on the mounting plates in the two blocks through the first connecting rod, a piston rod at the front end of the electric push rod is hinged with a second connecting rod, and the end part of the second connecting rod is fixedly connected with the triangular rotating plate.

7. The sofa mechanical stretching device according to claim 1, wherein: the backrest assembly comprises a backrest connecting plate and a backrest support rod, the middle part of the backrest connecting plate is hinged with the rear end of the seat rail, the lower end of the backrest connecting plate is hinged with the upper end of the backrest support rod, and the lower end of the backrest support rod is hinged with the rear end of the swinging connecting rod.

Technical Field

The invention relates to the field of sofa manufacturing, in particular to a mechanical stretching device for a sofa.

Background

The sofa as a household article comprises a backrest, a main body and a foot pad. The existing sofa is provided with a motor and a transmission device for realizing the rotation of a backrest and a foot pad to facilitate the lying down of a human body, so as to adjust the inclination angle of the backrest of the sofa and the extension length and height of the foot pad of the sofa, thereby facilitating the use of the sofa by a user and improving the use comfort.

However, the prior art transmission device still has drawbacks, such as that the patent document with publication number CN206543070U discloses a sofa, which comprises a sofa main body and a sofa support cooperatively connected with the sofa main body, wherein the sofa main body comprises an outer fixing seat, a handrail, a cushion, a waist rest, a footrest and a backrest; the method is characterized in that: the outer fixing seat comprises a bottom plate and a side wall; the backrest comprises an inner backrest and an outer backrest; the outer backrest is fixed with the bottom plate; the sofa support comprises a backrest component, a supporting cushion component, a foldable and telescopic footrest component, a fixed underframe, a push rod, a first connecting rod component, a second connecting rod component and a third connecting rod component; the handrail is fixed at the top end of the side wall; the fixed underframe is fixed on the bottom plate; the backrest component is fixed on the inner backrest; the push rod moves under the drive of the motor. Among this technical scheme, whole transmission structure is comparatively complicated, and its space that occupies bottom the sofa is great, leads to sofa bottom vacant space less, and on the other hand each subassembly can only contract to vertical state when the shrink state to keep off in the dead ahead of sofa seat bottom, thereby lead to the position of sofa bottom to be difficult to be swept the clearance.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a sofa mechanical stretching device which has the characteristics of simple and compact structure, so that the vacant space at the bottom of the sofa is increased, and the sofa is convenient to clean.

In order to achieve the purpose, the invention provides the following technical scheme:

a sofa mechanical stretching device is characterized in that: comprises a base component, a leg rest component, a seat component, a backrest component and an electric push rod;

the base component comprises two outer mounting plates which are arranged in parallel, a supporting rod arranged between the two outer mounting plates and an inner mounting plate which is arranged on the supporting rod and is positioned at the inner side of the outer mounting plates;

the seat component comprises a seat rail, a lock rod, a front connecting rod, a triangular rotating plate, a swinging connecting rod, a rear connecting rod and a supporting connecting rod; the rear end of the swing connecting rod is hinged to the rear end of the inner mounting plate, the middle part of the swing connecting rod is matched with the inner mounting plate in a vertically sliding manner, the front end of the swing connecting rod is hinged to the middle part of the lock rod, the upper end of the lock rod is hinged to the rear part of the front end of the seat rail, the lower end of the lock rod is hinged to the front end of the front connecting rod, the rear end of the front connecting rod is hinged to the rear end angle of the triangular rotating plate, the upper end angle of the triangular rotating plate is hinged to the front end of the inner mounting plate, the front end of the support connecting rod abuts against the bottom wall of the swing connecting rod, the middle part of the support connecting rod is hinged to the front part of the rear end of the swing;

the leg placing assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a driving rod and a leg placing plate; the front end of the first connecting rod is hinged to the rear part of the front end of the seat rail, the rear end of the first connecting rod is hinged to the rear end of the second connecting rod, the front end of the second connecting rod is hinged to the upper end of the footrest, the middle of the footrest is hinged to the front end of the third connecting rod, the rear end of the third connecting rod is hinged to the rear end of the fourth connecting rod, the front end of the fourth connecting rod is hinged to the front end of the seat rail, the rear end of the driving rod is hinged to the middle part of the swinging connecting rod, and the front end of the driving rod is hinged to the middle part of the first connecting rod;

the backrest assembly is hinged with the rear end of the seat rail and the rear end of the swinging connecting rod;

the rear end of the electric push rod is hinged to the base assembly, and the front end piston rod is connected with the triangular rotating plate and can drive the triangular rotating plate to rotate around a hinged point of the triangular rotating plate and the inner mounting plate.

Preferably, the second connecting rod is provided with a first guide pin rod for the fourth connecting rod to abut against.

Preferably, the leg rest assembly further comprises a middle leg rest plate, and the middle leg rest plate is arranged on the third connecting rod.

Preferably, a second guide pin is arranged in the middle of the swing connecting rod, and a guide groove for matching the second guide pin is arranged on the inner mounting plate.

Preferably, the inner mounting plate has a support pin at a front end thereof for supporting the swing link and the driving link.

Preferably, the rear end of the electric push rod is hinged with a first connecting rod and is arranged on the mounting plates in the two blocks through the first connecting rod, a piston rod at the front end of the electric push rod is hinged with a second connecting rod, and the end part of the second connecting rod is fixedly connected with the triangular rotating plate.

Preferably, the backrest assembly comprises a backrest connecting plate and a backrest support rod, the middle part of the backrest connecting plate is hinged with the rear end of the seat rail, the lower end of the backrest connecting plate is hinged with the upper end of the backrest support rod, and the lower end of the backrest support rod is hinged with the rear end of the swinging connecting rod.

The invention has the advantages that: drive the triangle through electric putter and change the board and rotate, the drive put leg subassembly and extend or shrink, seat rail around and luffing motion, back subassembly tilt around, when this extension device is in the position of sitting and when the complete contraction state promptly, put the leg subassembly and can contract on sofa base's bottom surface completely, compact structure, the space occupies fewly to and when putting the leg board and draw in on sofa base's bottom surface completely, be convenient for clean of sofa bottom space.

Drawings

Fig. 1 is a perspective view of a mechanical stretching device of a sofa according to the present embodiment;

FIG. 2 is a left side view of the mechanical extension device of the sofa according to the present embodiment;

FIG. 3 is a right side view of the mechanical sofa stretching apparatus provided in the present embodiment;

fig. 4 is a schematic view illustrating the mechanical extension device of the sofa according to the embodiment;

fig. 5 is a fully expanded view of the mechanical sofa stretching device according to the present embodiment;

fig. 6 is a schematic view of the mechanical extension device of the sofa according to the present embodiment installed on a sofa.

Detailed Description

The mechanical extension device of the sofa of the present invention will be further described with reference to fig. 1 to 6.

A sofa mechanical stretching device is characterized in that: comprises a base component, a leg rest component, a seat component, a backrest component and an electric push rod 4.

The base component comprises two outer mounting plates 1 arranged in parallel, a supporting rod 3 arranged between the two outer mounting plates 1 and two inner mounting plates 2 (only one inner mounting plate is shown in the attached drawings) arranged on the supporting rod 3 and positioned at the inner sides of the outer mounting plates 1; the support frame is fixed on the chair frame of the sofa chair through bolts.

The seat component comprises a seat rail 10, a lock rod 8, a front connecting rod 7, a triangular rotating plate 6, a swinging connecting rod 11, a rear connecting rod 12 and a supporting connecting rod 24; the rear end of swing connecting rod 11 articulates in the rear end of interior mounting panel 2, but on mounting panel 2 including sliding fit about the middle part, the front end is articulated with the middle part of locking lever 8, and the upper end of locking lever 8 is articulated by the back position with the front end of seat rail 10, and the lower extreme is articulated with the front end of preceding connecting rod 7, and the rear end of preceding connecting rod 7 is articulated with the rear end angle of triangle commentaries on classics board 6, and the upper end angle of triangle commentaries on classics board 6 is articulated with the front end of interior mounting panel 2, the front end of supporting link 24 supports through a pin 27 and leans on the diapire that supports in swing connecting rod 11, and the middle part is articulated by the front position with the rear end of swing connecting rod 11, and the rear end is articulated with the lower extreme of back connecting rod 12, and the upper end of back connecting. The leg rest assembly comprises a first link 15, a second link 16, a third link 17, a fourth link 18, a drive rod 9 and a leg rest plate 19; the front end of the first connecting rod 15 is hinged to the rear portion of the front end of the seat rail 10, the rear end of the first connecting rod is hinged to the rear end of the second connecting rod 16, the front end of the second connecting rod 16 is hinged to the upper end of the footrest, the middle of the footrest is hinged to the front end of the third connecting rod 17, the rear end of the third connecting rod 17 is hinged to the rear end of the fourth connecting rod 18, the front end of the fourth connecting rod 18 is hinged to the front end of the seat rail 10, the rear end of the driving rod 9 is hinged to the middle of the swing connecting rod 11, and the front end of the driving rod is hinged to the middle of the first connecting rod 15. The backrest module is hinged to the rear end of the seat rail 10 and the rear end of the swing link 11. The rear end of the electric push rod 4 is hinged to the base assembly, and a front end piston rod is connected with the triangular rotating plate 6 and can drive the triangular rotating plate 6 to rotate around a hinged point of the triangular plate and the inner mounting plate 2.

Based on the structure, when the stretching device is in a contraction state, the stretching device is electrically pushed open to be in a stretching state, and in the state, the structures among all the components are compact, so that the area occupation on the bottom surface of the seat plate of the sofa chair is obviously reduced, and meanwhile, the leg placing plate can be completely folded on the bottom surface of the seat plate of the sofa chair. When the stretching device needs to be unfolded, the electric push rod 4 contracts to drive the lower side part of the triangular rotating plate 6 to rotate forwards, the triangular rotating plate 6 drives the front connecting rod 7 to move forwards, the lower end of the lock rod 8 moves forwards, the upper end of the lock rod drives the seat rail 10 to move backwards, the seat rail 10 drives the upper end of the first connecting rod 15 to move backwards, and the lower end of the first connecting rod 15 moves forwards, so that the second connecting rod 16, the third connecting rod 17 and the fourth connecting rod 18 are linked to be unfolded, and finally, the leg placing plate is driven to be unfolded forwards so as to be placed for the artificial leg placing.

It should be noted that for convenience of description, the front, rear, upper and lower ends of the above or below components are referred to only by the states shown in fig. 1 to 3.

The second link 16 is provided with a first guide pin 23 against which the fourth link 18 abuts. The fourth link 18 can abut against the first guide pin during the unfolding and folding processes to ensure stable unfolding and folding of the leg rest assembly.

The leg placing component further comprises a middle leg placing plate 20, and the middle leg placing plate 20 is arranged on the third connecting rod 17 through a bolt. The middle leg placing plate can be used for supporting the lower legs of the human body, so that the comfort of the sofa in the lying posture state is further improved.

The swing link 11 has a second guide pin 22 at a middle portion thereof, and the inner mounting plate 2 has a guide groove 21 which is engaged with the second guide pin 22 and extends vertically. The up-and-down swing of the swing connecting rod 11 can be realized under the structure, and the up-and-down settlement effect of the sofa seat plate is realized.

The inner mounting plate 2 has a support pin 28 at the front end thereof for supporting the swing link 11 and the drive lever 9. The swing link 11 is supported at its distal end by the support pin 28 and the second guide pin 22, and the structural strength of the seat plate can be improved.

The rear end of electric putter 4 articulates there is head rod 5 to install on two interior mounting panels 2 through head rod 5, it has second connecting rod 26 to articulate on electric putter 4's the front end piston rod, and the tip of second connecting rod passes through bolt and triangle commentaries on classics board 6 fixed connection, and electric putter can stimulate second connecting rod 26 when flexible and rotate, thereby drives triangle commentaries on classics board 6 and rotates.

The backrest assembly comprises a backrest connecting plate 13 and a backrest support rod 14, the middle part of the backrest connecting plate 13 is hinged with the rear end of the seat rail 10, the lower end of the backrest connecting plate is hinged with the upper end of the backrest support rod 14, and the lower end of the backrest support rod 14 is hinged with the rear end of the swinging connecting rod.

Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.