Sofa Waist Proping Device

Abstract

The present invention discloses a sofa waist proping device comprising a frame and a waist adjusting mechanism, the frame being fixed on a sofa or a seat, the waist adjusting mechanism comprising a backrest and a first driving member rotatably connected to the frame respectively, the first driving member being rotatably connected to the backrest and driving the backrest to rotate around the frame oppositely. Since the first driving member is rotatably connected to the backrest and drives the backrest to rotate around a fixing member, the position of the backrest is adjusted, with a structure simple and stable and comfortableness increased.

Claims

1. A sofa waist proping device comprising a frame fixed to a sofa or a seat, characterized in that the sofa waist proping device further comprises a waist adjusting mechanism comprising a backrest and a first driving member rotatably connected to the frame respectively, the first driving member being rotatably connected to the backrest and driving the backrest to rotate around the frame oppositely.

2. The sofa waist proping device of claim 1 characterized in that the frame comprises a connecting member provided with a limit part, the backrest being rotatably connected to the connecting member and rotating around the connecting member, and the backrest being stopped from rotating by being brought into contact with the limit part.

3. The sofa waist proping device of claim 2 characterized in that the connecting member further comprises two flat plates, the limit part being located outside of the two flat plates, the first driving member being rotatably connected to the inside of the two flat plates.

4. The sofa waist proping device of claim 3 characterized in that the frame further comprises a fixing rod, the connecting member being fixed to the middle portion of the fixing rod to which the backrest is perpendicular and the first driving member is perpendicular, and the rotation angle of the backrest is 0 to 30.

5. The sofa waist proping device of claim 1 characterized in that the backrest comprises at least a rib and a backup plate, the rib being fixedly connected to the backup plate, the first drive member being rotatably connected to the connecting member at both ends of the rib.

6. The sofa waist proping device of claim 1 characterized in that the first driving member comprises a driving source, the driving source being any one of an air cylinder, an oil cylinder, an electric cylinder or a motor.

7. The sofa waist proping device of claim 1 characterized in that the sofa waist proping device further comprises a head adjusting mechanism comprising a second driving member, a headrest, and a headrest fixing member, the two ends of the second driving member being rotatably connected to the headrest fixing member and the connecting member respectively, the headrest fixing member being rotatably connected to the frame, and the second driving member driving the headrest to rotate around the frame.

8. The sofa waist proping device of claim 7 characterized in that the headrest fixing member comprises at least one rotation limit member and a link rod, the at least one rotation limit member being fixed to the link rod.

9. The sofa waist proping device of claim 8 characterized in that the frame further comprises at least one side fixing member, the at least one rotation limit member being provided with a rotation groove, the at least one side fixing member being provided with a convex platform which slides in the rotation groove such that the rotation angle of the headrest is limited to 0 to 45.

10. The sofa waist proping device of claim 8 characterized in that the frame further comprises a fixing rod, the connecting member being fixed to the middle portion of the fixing rod to which the headrest is perpendicular and the second driving member is perpendicular.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a perspective view of a sofa waist proping device according to the present invention.

[0019] FIG. 2 is an exploded view of the sofa waist proping device shown in FIG. 1.

[0020] FIG. 3 is an exploded view of a backrest in the sofa waist proping device shown in FIG. 1.

[0021] FIG. 4 is an exploded view of a head adjusting mechanism in the sofa waist proping device shown in FIG. 1.

[0022] In the figures:

[0023] 100 Sofa waist proping device

[0024] 1 Frame

[0025] 11 Fixing rod

[0026] 12 Connecting member

[0027] 121 121 Limit part

[0028] 13 Side fixing member

[0029] 131 Convex platform

[0030] 2 Waist adjusting mechanism

[0031] 21 Backrest

[0032] 211 Backup plate

[0033] 212 Rib

[0034] 22 First driving member

[0035] 221 Driving source

[0036] 222 Pushing rod

[0037] 3 Head adjusting mechanism

[0038] 31 Second driving member

[0039] 32 Headrest fixing member

[0040] 321 Rotation limit member

[0041] 3211 Rotation groove

[0042] 33 Headrest

DETAILED DESCRIPTION OF THE INVENTION

[0043] In the following, the invention will be further described in conjunction with the accompanying drawings and the detailed description.

[0044] Shown in FIG. 1 is a preferred embodiment of a sofa waist proping device 100 according to the present invention, and the sofa waist proping device 100 comprises a frame 1, a waist adjusting mechanism 2, and a head adjusting mechanism 3.

[0045] The frame 1 comprises a fixing rod 11, a connecting member 12, and two side fixing members 13. Both ends of the fixing rod 11 are fixed to a sofa, the connecting member 12 is fixed to the middle portion of the fixing rod 11, the connecting member 12 is provided with a limit part 121, each of the side fixing members 13 is fixed to a sofa and provided with a convex platform 131.

[0046] As shown in FIGS. 2 to 3, the waist adjusting mechanism 1 comprises a backrest 21 and a first driving member 22. The backrest 21 and the first driving member 22 are rotatably connected to the connecting member 12 respectively, and the backrest 21 is rotatably connected to the other end of the first driving member 22. The backrest 21 comprises a backup plate 211 and two ribs 212, and each rib 212 is fixedly connected to the backup plate 211. The backup plate 211 is a concave plate and has same curve as the waist of a human body, having stable strength and high comfortableness. The first driving member 22 comprises a driving source 221 and a pushing rod 222, the drive source 221 is connected to the pushing rod 222 at one end and drives the pushing rod 222 to move, and preferably, the driving source 221 is one of a motor, a cylinder, an oil cylinder, and an electric cylinder.

[0047] As shown in FIG. 4, the head adjusting mechanism 3 comprises a second driving member 31, a headrest fixing member 32, and a headrest 33, the second driving member 31 is the same as the first driving member 22, two ends of the second driving member 31 are rotatably connected to the headrest fixing member 32 and the connecting member 12 respectively, the headrest fixing member 32 is rotatably connected to the side fixing member 13, and the headrest 33 is fixed to the headrest fixing member 32. The headrest fixing member 32 comprises two rotation limit members 321 and a link rod 322, and each of the rotation limit members 321 is fixed to the end of the link rod 322. The rotation limit member 321 is provided with a rotation groove 3211 which has a slightly larger diameter than that of the convex platform 131.

[0048] When the sofa waist proping device 100 is assembled, the two ends of the rib 212 of the backrest 21 are rotatably connected to the driving source 221 and one end of the connect member 12 respectively, one end of the pushing rod 222 is rotatably connected to the connecting member 12, the connecting member 12 is fixed to the middle portion of the fixing rod 11, the two ends of the second driving member 31 are rotatably connected to the headrest fixing member 32 and the connecting member 12 respectively, the rotation limit member 321 of the headrest fixing member 32 is rotatably connected to the side fixing member 13, the convex platform 131 slides in the rotation groove 3211 to limit the rotation angle of the headrest fixing member 32, so as to make the performance of the device more stable and safe, and preferably, the rotation angle is 0 to 45.

[0049] When the waist proping device 100 is used, the driving source 221 drives the pushing rod 222, and drives the backrest 21 to rotate around the connecting member 12 to bring the backrest 21 to a desired angle. When the rib 212 of the backrest 21 is brought into contact with the limit part 121 of the connecting member 12, the initial position of the backrest 21 is arrived, and preferably, the rotation angle is 0 to 30. The second driving member 31 drives the headrest fixing member 32 and the headrest 33 to rotate around the side fixing member 13 to bring the backrest 21 to a desired angle with smooth operation. The convex platform 131 of the side fixing member 13 slides in the rotation groove 3211 of the rotation limit member to limit the rotation angle of the headrest 33, and preferably, the rotation angle is 0 to 45. The positions of the backrest 21 and the headrest 33 can be adjusted according to various conditions by the cooperation of the waist adjusting mechanism 2 and the head adjusting mechanism 3, with a structure simple and easy to use and sofa's comfortableness increased.

[0050] It will be apparent to those skilled in the art that various other changes and modifications may be made in the light of the above teachings and concepts, and all such changes and modifications are intended to be within the scope of the present invention as defined by the appended claims.