backrest support

Abstract

The utility model belongs to the technical field of seat support, concretely relates to backrest support, including backrest frame, the upper portion of backrest frame is equipped with headrest frame, the inside of backrest frame is equipped with lifting pipe, the inside of lifting pipe is equipped with lifting rod, the inside of backrest support is equipped with first support, second support of first support bottom side, lifting pipe with first support sliding fit, lifting rod with second support sliding fit, the top end of lifting pipe extends to backrest frame upside, the top end of lifting rod extends to lifting pipe top end upside, the top end of lifting rod with headrest frame bottom side swing joint, be equipped with curved rod on the headrest frame, the bottom end of curved rod with lifting pipe top end swing joint, the top end of curved rod with headrest frame upside swing joint, headrest height control, headrest angle swing is integrated structure, reduce the volume of backrest bone support, reduce cost.

Description

Technical Field

[0001] This utility model belongs to the field of seat support technology, specifically relating to backrest supports. Background Technology

[0002] The headrest frame and backrest frame of sofas or chairs are generally movable connection structures. The backrest support is equipped with a lifting drive device to drive the headrest frame to rise and fall, and an angle adjustment device to drive the headrest angle adjustment. This is costly. The existing lifting drive device and angle adjustment device occupy a large space in the backrest frame. In addition, space needs to be reserved for the drive device during the driving process, resulting in a large backrest support. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a backrest support that integrates headrest height control and headrest angle swing, thereby reducing the volume of the backrest support and lowering costs.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0005] A backrest support includes a backrest frame, a headrest frame at the top of the backrest frame, a lifting tube inside the backrest frame, a lifting rod inside the lifting tube, a first bracket and a second bracket at the bottom of the first bracket on the inner side of the backrest frame, the lifting tube slidingly engaging with the first bracket, the lifting rod slidingly engaging with the second bracket, the top end of the lifting tube extending to the upper side of the backrest frame, the top end of the lifting rod extending to the top of the lifting tube, the top end of the lifting rod being movably connected to the bottom side of the headrest frame, a curved rod on the headrest frame, the bottom end of the curved rod being movably connected to the top end of the lifting tube, and the top end of the curved rod being movably connected to the upper side of the headrest frame.

[0006] Furthermore, the inner side of the backrest frame is provided with two symmetrically distributed lifting tubes, and the lifting rod is correspondingly arranged with the lifting tubes.

[0007] Furthermore, the inner side of the backrest frame is provided with a first connecting plate and a second connecting plate. The two ends of the first connecting plate are respectively connected to the bottom ends of the two lifting tubes, and the two ends of the second connecting plate are respectively connected to the two lifting rods. The second connecting plate is located below the first connecting plate.

[0008] Furthermore, a first driving component is provided on the upper inner side of the backrest frame, and the output end of the first driving component is connected to the first connecting plate. A second driving component is provided on the lower inner side of the backrest frame, and the output end of the second driving component is connected to the second connecting plate.

[0009] Furthermore, the first bracket is provided with a first sliding sleeve that slides in cooperation with the lifting tube, and the upper part of the backrest frame is provided with a second sliding sleeve that slides in cooperation with the lifting tube.

[0010] Furthermore, the second bracket is provided with a third sliding sleeve that slides in cooperation with the lifting tube.

[0011] Furthermore, a third sliding sleeve is provided on the first connecting plate, and the lifting rod passes through the third sliding sleeve, with the lifting rod and the third sliding sleeve in sliding engagement.

[0012] Furthermore, the headrest frame is provided with a flip plate at the bottom, the lower part of the flip plate is pivotally connected to the top of the lifting rod, the top of the curved rod is pivotally connected to the upper part of the flip plate, and the bottom of the curved rod is pivotally connected to the top of the lifting tube.

[0013] The beneficial effects of the present invention are as follows: By adopting the above solution, the lifting tube and lifting rod integrated in the inner space of the backrest support are fully utilized to control the lifting height and tilting angle of the headrest respectively. Compared with the prior art, the lifting tube and lifting rod occupy less space, reducing the volume of the backrest support. Under the same space conditions, more backrest supports can be accommodated, significantly reducing transportation and storage costs. The integrated lifting tube and lifting rod also significantly reduce the cost of the backrest support. Attached Figure Description

[0014] The foregoing and other objects, features and advantages of this invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a side view of the headrest in this utility model.

[0017] in:

[0018] 1 represents the backrest frame, 11 represents the first support, 12 represents the second support, 100 represents the third sliding sleeve, 110 represents the first sliding sleeve, and 120 represents the second sliding sleeve.

[0019] 20 is the headrest frame, 21 is the flip panel, and 22 is the curved rod.

[0020] 30 is the rising pipe, 31 is the first connecting plate, and 310 is the fourth sliding sleeve.

[0021] 40 is the lifting rod, 41 is the second connecting plate, 50 is the first driving component, and 60 is the second driving component. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] See Figure 1 The backrest support includes a backrest frame 10 and a headrest frame 20. The backrest frame 10 can be a rectangular structure. Two lifting tubes 30 are symmetrically arranged on the inner side of the backrest frame 10. The lifting tubes 30 and the backrest frame 10 are slidably engaged in the width direction of the backrest frame 10. The lifting tubes 30 are provided with lifting rods 40 inside. The lifting tubes 30 and the lifting rods 40 are coaxial. The lifting rods 40 are slidably engaged with the inner wall of the lifting tubes 30. The lifting tubes 30 extend to the upper side of the backrest frame 10, and the top of the lifting rods 40 extends to the upper side of the top of the lifting tubes 30.

[0024] The headrest frame 20 has a flip plate 21 at its bottom. The lower part of the flip plate 21 is pivotally connected to the top end of the lifting rod 40 via a first pin. A curved rod 22 is provided on the outer side of the flip plate 21. The bottom end of the curved rod 22 is pivotally connected to the front side of the top end of the lifting tube 30 via a pin. In the width direction of the backrest frame, the flip plate 21 is located inside the lifting tube 30. The upper end of the curved rod 22 extends to the upper part of the flip plate 21, and the upper end of the curved rod 22 is pivotally connected to the upper end of the flip plate 21. The headrest frame 20 is connected to the flip plate 21. The flip plate 21 moves up and down synchronously with the lifting tube 30, realizing the movement of the headrest frame 20. The headrest frame 20 is adjusted by pivoting the bottom of the crank 22 with the lifting tube 40 to form a swing axis for adjusting the angle of the headrest frame 20. The top of the lifting rod 40 moves up and down, pulling the bottom of the flip plate 21 up and down. The top of the crank 22 is connected to the upper part of the flip plate 21. Under the action of the crank 22, the flip plate 21 swings with the first pin position as the swing axis, controlling the lifting amplitude of the lifting rod 40 and realizing the adjustment of the swing angle of the headrest frame 20. The lifting control and swing control of the headrest are integrated, simplifying the structure of the headrest frame. Compared with the existing technology, the cost is lower and the control of the movement posture is reliable.

[0025] The inner side of the backrest frame 10 is provided with a first support 11 and a second support 12 on the bottom side of the first support 11. The first support 11 is provided with a first sliding sleeve 110, and the second support 12 is provided with a second sliding sleeve 120. The upper frame of the backrest frame 10 is provided with a third sliding sleeve 100. The third sliding sleeve 100, the first sliding sleeve 110, and the second sliding sleeve 120 are coaxially arranged, and their axis coincides with the axis of the lifting tube 30. The tube body of the lifting tube 30 extends from the third sliding sleeve 100, the first sliding sleeve 110, the second sliding sleeve 120, and the second sliding sleeve 120. The sliding sleeve 110 passes through, and the body of the lifting tube 30 maintains a sliding fit with the third sliding sleeve 100 and the first sliding sleeve 110. The lifting rod 40 passes through the axis of the second sliding sleeve 120, and the lifting rod 40 slides with the second sliding sleeve 120. The arrangement of the third sliding sleeve 100, the first sliding sleeve 110, and the second sliding sleeve 120 ensures that the lifting tube 30 and the lifting rod 40 maintain good coaxiality, providing guidance for the lifting and lowering movement and improving the stability of the headrest lifting and swinging control.

[0026] The inner side of the backrest frame 10 is provided with a first connecting plate 31 and a second connecting plate 41. The second connecting plate 41 is located below the first connecting plate 31. Both ends of the first connecting plate 31 are connected to the bottom ends of two lifting tubes 30, and both ends of the second connecting plate 41 are connected to the bottom ends of two lifting rods 40. The first connecting plate 31 connects the two lifting tubes 30 into a single structure. Combined with the backrest frame 10, the lifting tubes 30 form a stable first rectangular lifting mechanism. The upper inner side of the backrest frame 10 is provided with a first driving component 50. The first driving component 50 is preferably an electric push rod. The fixed end of the first driving component 50 is connected to the upper inner side of the backrest frame 10, and the output end of the first driving component 50 is connected to the first connecting rod 31, driving the first rectangular lifting mechanism to move up and down. The first rectangular lifting mechanism itself is stable. Combined with the guidance of the first sliding sleeve 110 and the third sliding sleeve 100, the smoothness of the headrest lifting control is improved.

[0027] The second connecting plate 41 connects the two lifting rods 40 into a single structure. The first connecting plate 31 is provided with a second driving component 60, which is preferably an electric push rod. The output end of the second driving component 60 is connected to the second connecting plate 41. The second driving component 60 drives the two lifting rods 40 to move synchronously up and down within the lifting tube 30. The first connecting plate 31 is provided with a fourth sliding sleeve 310, through which the lifting rod 30 passes. The fourth sliding sleeve 310 is coaxial with the lifting tube 30. The second sliding sleeve 120 and the fourth sliding sleeve 310 form a guiding and stabilizing mechanism for the lifting rod 40, improving the guidance for the up and down movement of the lifting rod 40. The upper end of the lifting rod 40 is restricted by the fourth sliding sleeve 310, and its lower end is connected to the second connecting rod 41 to form a whole, forming a stable second lifting mechanism. Combined with the guidance of the second sliding sleeve 120 and the fourth sliding sleeve 310, the stability and synchronicity of the headrest angle swing control are improved.

[0028] The second drive component 60 and the first drive component 50 are controlled independently and do not affect each other. The lifting and swinging of the headrest do not interfere with each other. The fixed end of the second drive component 60 is installed on the first connecting plate 31. The second drive component 60 moves up and down synchronously with the first connecting plate 31, which can make full use of the inner space inside the backrest frame 10, reduce the volume of the backrest frame, and at the same time, avoid the second drive component 60 interfering with the lifting tube 30.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A backrest support, comprising a backrest frame, wherein a headrest frame is provided on the upper part of the backrest frame, characterized in that: The backrest frame has a lifting tube inside, and a lifting rod inside the lifting tube. The backrest support has a first support and a second support at the bottom of the first support. The lifting tube is slidably engaged with the first support, and the lifting rod is slidably engaged with the second support. The top end of the lifting tube extends to the upper side of the backrest frame, and the top end of the lifting rod extends to the top of the lifting tube. The top end of the lifting rod is movably connected to the bottom side of the headrest frame. The headrest frame has a curved rod, the bottom end of which is movably connected to the top end of the lifting tube, and the top end of which is movably connected to the upper side of the headrest frame.

2. The backrest support according to claim 1, characterized in that: The inner side of the backrest frame is provided with two symmetrically distributed lifting tubes, and the lifting rod is arranged corresponding to the lifting tubes.

3. The backrest support according to claim 2, characterized in that: The inner side of the backrest frame is provided with a first connecting plate and a second connecting plate. The two ends of the first connecting plate are respectively connected to the bottom ends of the two lifting tubes, and the two ends of the second connecting plate are respectively connected to the two lifting rods. The second connecting plate is located below the first connecting plate.

4. The backrest support according to claim 3, characterized in that: The upper inner side of the backrest frame is provided with a first driving component, the output end of which is connected to the first connecting plate. The lower inner side of the backrest frame is provided with a second driving component, the output end of which is connected to the second connecting plate.

5. The backrest support according to claim 1, characterized in that: The first bracket is provided with a first sliding sleeve that slides in cooperation with the lifting tube, and the upper part of the backrest frame is provided with a second sliding sleeve that slides in cooperation with the lifting tube.

6. The backrest support according to claim 1, characterized in that: The second bracket is provided with a third sliding sleeve that slides in conjunction with the lifting tube.

7. The backrest support according to claim 3, characterized in that: The first connecting plate is provided with a third sliding sleeve, and the lifting rod passes through the third sliding sleeve, with the lifting rod and the third sliding sleeve in sliding cooperation.

8. The backrest support according to claim 1, characterized in that: The headrest frame has a flip plate at the bottom, the lower part of the flip plate is pivotally connected to the top of the lifting rod, the top of the curved rod is pivotally connected to the upper part of the flip plate, and the bottom of the curved rod is pivotally connected to the top of the lifting tube.

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