Lifting seat backrest

Abstract

The utility model relates to the technical field of furniture seats, in particular to a lifting seat backrest which comprises a front backup plate, a rear backup plate is arranged on the rear side of the outer wall of the front backup plate, a backrest connecting frame connected with a seat is arranged between the front backup plate and the rear backup plate, and a positioning connecting part is arranged at one end, close to the front backup plate, of the backrest connecting frame. According to the utility model, the elastic positioning piece is mounted in the mounting hole formed in the backrest connecting frame, and when a person moves the backrest, the ball or the bolt arranged in the elastic positioning piece can penetrate out of the metal cylinder under the action of the spring and then is inserted into the positioning insertion hole formed in the guide sliding strip; therefore, a person can adjust the height of the backrest according to requirements, and the structural stability of the backrest after adjustment can also be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture seats, in particular to a lifting seat backrest. Background Art

[0002] Cylinder seats usually refer to the cylinder structure of the seat back or cushion part, which can adjust the hardness, softness and support of the seat by inflating or exhausting air to provide a more comfortable riding experience. This design can be adjusted according to the physical needs of the passengers, improving the comfort and ergonomic support of the seat.

[0003] When people sit for a long time, the support of the backrest is the guarantee of their comfort. The backrest of the existing cylinder seats is mostly fixed. However, since the height and sitting posture of the passengers are different, the fixed backrest often cannot provide good support for the passengers, resulting in the existing seats being unable to suit more people. Therefore, the existing seat backrest still has certain shortcomings.

[0004] In summary, it is necessary to invent a lifting seat backrest. Utility Model Content

[0005] To this end, the utility model provides a liftable seat backrest to solve the problem that since passengers have different heights and sitting postures, the fixed backrest often cannot provide good support for the passengers, resulting in the existing seats being unable to accommodate more people.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liftable seat backrest, comprising a front backrest, a rear backrest is arranged on the rear side of the outer wall of the front backrest, a backrest connecting frame connected to the seat is arranged between the front backrest and the rear backrest, and a positioning connecting component is arranged at one end of the backrest connecting frame close to the front backrest.

[0007] Preferably, a rear connecting plate is installed at one end of the rear backrest away from the backrest connecting frame, and a front backrest for supporting the back of a person is embedded in one end of the front backrest away from the backrest connecting frame. Concave grooves are provided on the outer wall of the front backrest at the front and rear ends and at the positions corresponding to the backrest connecting frame, and the outer wall of the backrest connecting frame is slidably connected to the inner wall of the concave groove.

[0008] Preferably, the positioning connection component comprises a mounting hole, the mounting hole is arranged at the center of an outer wall of a side of the backrest connecting frame close to the front backrest plate, and an elastic positioning piece is installed on the inner wall of the mounting hole.

[0009] Preferably, the outer wall of one side of the backrest connecting frame close to the front back plate and located at the front and rear ends of the mounting hole are provided with guide grooves, and the side wall of the front back plate and guide slide bars are fixed at positions corresponding to the guide grooves, and the inner walls of the guide grooves are slidably connected to the outer walls of the guide slide bars.

[0010] Preferably, a positioning hole is provided on the outer wall of one side of the front backrest close to the backrest connecting frame and at a position corresponding to the elastic positioning member, and a plurality of the positioning holes are evenly arranged in a strip array, and the elastic positioning members are used in conjunction with the inner walls of the positioning holes.

[0011] Preferably, the elastic positioning member is a first metal cylinder, the outer wall of the first metal cylinder is connected to the inner wall of the mounting hole, a first avoidance hole is formed at one end of the first metal cylinder away from the mounting hole, and a first ball is provided on the inner wall of the first avoidance hole.

[0012] Preferably, the outer wall of the first ball is connected to the inner wall of the positioning hole, and a supporting ball bottom support is provided on the inner wall of the first metal tube and below the first ball, and one end of the ball bottom support away from the first ball is connected to one end of a first tensioning spring, and one end of the first tensioning spring away from the ball bottom support is in contact with the bottom end of the inner wall of the first metal tube.

[0013] Preferably, the elastic positioning member is a second metal cylinder, a second avoidance hole is opened at the top of the outer wall of the second metal cylinder, a metal latch is slidably connected to the inner wall of the second avoidance hole, and a second ball is embedded in the end of the metal latch away from the second metal cylinder.

[0014] Preferably, the side ends of the outer wall of the metal plug are provided with through holes, the inner walls of the through holes are slidably connected with guide rods, the upper and lower ends of the guide rods are fixed to the upper and lower sides of the inner wall of the second metal tube, the bottom end of the outer wall of the metal plug is connected to one end of the second tensioning spring, and the other end of the second tensioning spring is fixed to the bottom end of the inner wall of the second metal tube.

[0015] The beneficial effects of the utility model are:

[0016] In the utility model, the elastic positioning member is installed in the mounting hole provided in the backrest connecting frame. When a person moves the backrest, the ball or pin provided in the elastic positioning member can pass through the metal tube under the action of the spring and then be inserted into the positioning hole provided in the guide slide bar, so that the person can adjust the height of the backrest according to the needs, and the stability of the structure of the backrest after adjustment can be ensured, which makes it more convenient for people to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the backrest of the utility model when viewed from the right side;

[0018] Figure 2 For this utility model Figure 1 Schematic diagram of the explosion structure;

[0019] Figure 3 This is a schematic diagram of the structure of the connection between the backrest connecting frame and the rear backrest plate in the utility model;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the front back plate of the utility model when viewed from the left side;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the elastic positioning member in the first embodiment of the utility model in the front view direction;

[0022] Figure 6 For this utility model Figure 5 Schematic diagram of the external three-dimensional structure;

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the ball bottom support in the utility model;

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the elastic positioning member in the second embodiment of the utility model in the front view direction.

[0025] In the figure: 100, front backrest; 110, guide slide; 120, positioning socket; 200, front backrest; 300, rear backrest; 400, rear connecting plate; 500, backrest connecting frame; 510, guide slide; 520, mounting hole; 600, elastic positioning member; 610, first metal cylinder; 620, first ball; 630, ball bottom support; 640, first tensioning spring; 650, second metal cylinder; 651, metal latch; 652, second ball; 653, guide rod; 654, second tensioning spring. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Embodiment 1:

[0028] See attached Figure 1-7The utility model provides a lifting seat backrest, comprising a front backrest 100, a rear backrest 300 is arranged on the rear side of the outer wall of the front backrest 100, a backrest connecting frame 500 connected to the seat is arranged between the front backrest 100 and the rear backrest 300, the front backrest 100, the rear backrest 300 and the rear connecting plate 400 can be connected and fixed by bolts, the rear connecting plate 400 is installed at one end of the rear backrest 300 away from the backrest connecting frame 500, and the front backrest 200 for supporting the back of the person is inlaid at one end of the front backrest 100 away from the backrest connecting frame 500, and a concave groove is opened at the front and rear ends of the outer wall of the front backrest 100 and at the corresponding position of the backrest connecting frame 500, the outer wall of the backrest connecting frame 500 is slidably connected with the inner wall of the concave groove, and the concave groove is provided to form an avoidance groove when combined with the rear backrest 300, and the backrest connecting frame 500 can slide up and down in the avoidance groove;

[0029] A positioning connection component is provided at one end of the backrest connecting frame 500 close to the front backrest plate 100, and the positioning connection component includes a mounting hole 520. The mounting hole 520 is opened at the center of the outer wall of one side of the backrest connecting frame 500 close to the front backrest plate 100. The opening of the mounting hole 520 is for placing and installing the elastic positioning member 600, and the elastic positioning member 600 is for fixing the positions of the movable front backrest plate 100 and the rear backrest plate 300 in cooperation with the opening of the positioning socket 120. The inner wall of the mounting hole 520 is installed with the elastic positioning member 600, and the outer wall of the side of the backrest connecting frame 500 close to the front backrest plate 100 and located at the front and rear ends of the mounting hole 520 are provided with guide slide grooves 510, and the side wall of the front backrest plate 100 and at the corresponding position of the guide slide grooves 510 are fixed with guide slide bars 110, and the inner wall of the guide slide grooves 510 is aligned with the guide slide bars 110. The outer wall of the strip 110 is slidably connected, and the front backrest 100 can slide up and down in the guide slot 510 provided through the guide slide strip 110, and the guide slide strip 110 and the guide slot 510 play the role of guiding without affecting the up and down sliding of the front backrest 100. The front backrest 100 is close to the outer wall of one side of the backrest connecting frame 500 and is provided with a positioning hole 120 at a position corresponding to the elastic positioning member 600. The plurality of positioning holes 120 are evenly arranged in a strip array, and the elastic positioning members 600 are used in conjunction with the inner wall of the positioning hole 120. Specifically, by inserting the elastic positioning member 600 into the positioning holes 120 at different heights, the personnel can fix the front backrest 100 after adjusting the height to avoid shaking and displacement during the leaning process.

[0030] The elastic positioning member 600 is a first metal cylinder 610, the outer wall of the first metal cylinder 610 is connected to the inner wall of the mounting hole 520, and a first avoidance hole is provided at one end of the first metal cylinder 610 away from the mounting hole 520. A first ball 620 is provided on the inner wall of the first avoidance hole. The first avoidance hole is provided to allow the first ball 620 to extend out, and the first ball 620 provided can rotate in the first avoidance hole. The outer walls of the first ball 620 are connected to the inner wall of the positioning socket 120, and the protruding end of the first ball 620 can extend into the inner wall of the positioning socket 120 for clamping. When a person moves the front back plate 100, the rotating positioning socket 120 can facilitate the person to move the front back plate 100. The inner wall of the first metal cylinder 610 is located below the first ball 620. A supporting ball bottom support 630 is provided, and the supporting ball bottom support 630 is used to support the bottom end of the first ball 620 so that the first ball 620 can extend from the first avoidance hole, and the bottom end of the first ball 620 can rotate at the top of the outer wall of the ball bottom support 630, and the end of the ball bottom support 630 away from the first ball 620 is connected to one end of the first tightening spring 640, and the end of the first tightening spring 640 away from the ball bottom support 630 is abutted against the bottom end of the inner wall of the first metal cylinder 610, and the first tightening spring 640 can use the elastic force of the ball bottom support 630 to push the first ball 620 upward, so that the first ball 620 can extend into the first avoidance hole for clamping without the action of external force.

[0031] The use process of the utility model is as follows: first, the personnel can insert the first metal cylinder 610 into the mounting hole 520 provided in the backrest connecting frame 500, and then place the backrest connecting frame 500 between the front backrest board 100 and the rear backrest board 300, so that the guide slide bar 110 is slidably connected with the inner wall of the guide slide groove 510, and then the personnel can fix the front backrest board 100, the rear backrest board 300 and the rear connecting plate 400 with bolts, and then connect and fix the two ends of the backrest connecting frame 500 to the backrest mounting position of the seat, so that the front backrest board 100 can support the back of the user when sitting;

[0032] When necessary, the personnel can hold the backrest so that the backrest can slide up and down on the outer wall of the backrest connecting frame 500. When moving, the first ball 620 will first shrink toward the inside of the first metal cylinder 610, so that the first ball 620 is separated from the positioning socket 120. At this time, the personnel can pull the backrest to slide up and down. After the sliding is completed, the first tightening spring 640 will use the elastic force of the ball bottom support 630 to push the first ball 620 outward, so that the first ball 620 is reinserted into the positioning socket 120 to fix the position of the backrest.

[0033] Embodiment 2:

[0034] See attached Figure 8 Compared with the first embodiment, the present embodiment is characterized in that the elastic positioning member 600 is a second metal cylinder 650, and a second avoidance hole is provided at the top of the outer wall of the second metal cylinder 650. The second avoidance hole is provided to allow the metal latch 651 to extend from the top of the second metal cylinder 650 so that the metal latch 651 and the second ball 652 can be inserted into the positioning socket 120 to fix the backrest. The inner wall of the second avoidance hole is slidably connected with the metal latch 651, and the end of the metal latch 651 away from the second metal cylinder 650 is inlaid with the second ball 652, and the inlaid second ball 652 can rotate at the front end of the metal latch 651, so that the height position of the backrest can be adjusted conveniently by personnel. The side ends of the outer wall of the metal latch 651 are all provided with through holes, and the inner walls of the through holes are all slidably connected with guide rods 653, and the upper and lower ends of the guide rods 653 are It is fixed to the upper and lower sides of the inner wall of the second metal cylinder 650, and the guide rod 653 is provided to limit the positions of the two ends of the metal latch 651 to ensure that the metal latch 651 can only slide up and down on the inner wall of the second metal cylinder 650. The bottom end of the outer wall of the metal latch 651 is connected to one end of the second tensioning spring 654, and the other end of the second tensioning spring 654 is fixed to the bottom end of the inner wall of the second metal cylinder 650. The second tensioning spring 654 is provided to make the metal latch 651 extend out of the second avoidance hole through elastic force, so that the metal latch 651 can be better inserted into the positioning socket 120 to fix the backrest. Compared with the first embodiment, the metal latch 651 and the second tensioning spring 654 provided in this embodiment can ensure that the extended end structure of the metal latch 651 is more stable, and the fixing effect of the backrest is better.

[0035] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A liftable seat backrest, comprising a front backrest plate (100), a rear backrest plate (300) being arranged on the rear side of the outer wall of the front backrest plate (100), characterized in that: A backrest connecting frame (500) connected to the seat is arranged between the front backrest plate (100) and the rear backrest plate (300); a positioning connecting component is arranged at one end of the backrest connecting frame (500) close to the front backrest plate (100); the positioning connecting component comprises a mounting hole (520); the mounting hole (520) is arranged at the center of the outer wall of one side of the backrest connecting frame (500) close to the front backrest plate (100); an elastic positioning member (600) is installed on the inner wall of the mounting hole (520); a positioning socket (120) is arranged on the outer wall of one side of the front backrest plate (100) close to the backrest connecting frame (500) and at a position corresponding to the elastic positioning member (600); a plurality of the positioning sockets (120) are uniformly arranged in a strip array; and the elastic positioning members (600) are used in conjunction with the inner wall of the positioning socket (120).

2. The liftable seat back according to claim 1, characterized in that: A rear connecting plate (400) is installed at one end of the rear backrest (300) away from the backrest connecting frame (500), and a front backrest (200) for supporting the back of a person is embedded at one end of the front backrest (100) away from the backrest connecting frame (500). Concave grooves are provided at the front and rear ends of the outer wall of the front backrest (100) and at positions corresponding to the backrest connecting frame (500), and the outer wall of the backrest connecting frame (500) is slidably connected to the inner wall of the concave groove.

3. The liftable seat back according to claim 1, characterized in that: The backrest connecting frame (500) is provided with a guide slot (510) on the outer wall of one side close to the front back plate (100) and at the front and rear ends of the mounting hole (520); the side wall of the front back plate (100) and the corresponding position of the guide slot (510) are fixed with a guide slide bar (110); the inner wall of the guide slot (510) is slidably connected to the outer wall of the guide slide bar (110).

4. The liftable seat back according to claim 3, characterized in that: The elastic positioning member (600) is a first metal cylinder (610), the outer wall of the first metal cylinder (610) is connected to the inner wall of the mounting hole (520), and a first avoidance hole is provided at one end of the first metal cylinder (610) away from the mounting hole (520), and a first ball (620) is provided on the inner wall of the first avoidance hole.

5. The liftable seat backrest according to claim 4, characterized in that: The outer wall of the first ball (620) is connected to the inner wall of the positioning socket (120), and a supporting ball bottom support (630) is provided on the inner wall of the first metal cylinder (610) and below the first ball (620). One end of the ball bottom support (630) away from the first ball (620) is connected to one end of a first tensioning spring (640), and one end of the first tensioning spring (640) away from the ball bottom support (630) is in contact with the bottom end of the inner wall of the first metal cylinder (610).

6. The liftable seat back according to claim 1, characterized in that: The elastic positioning member (600) is a second metal cylinder (650), the top of the outer wall of the second metal cylinder (650) is provided with a second avoidance hole, the inner wall of the second avoidance hole is slidably connected with a metal latch (651), and the end of the metal latch (651) away from the second metal cylinder (650) is embedded with a second ball (652).

7. The liftable seat back according to claim 6, characterized in that: The side ends of the outer wall of the metal plug (651) are each provided with a through hole, and the inner wall of the through hole is slidably connected to a guide rod (653), and the upper and lower ends of the guide rod (653) are fixed to the upper and lower sides of the inner wall of the second metal cylinder (650). The bottom end of the outer wall of the metal plug (651) is connected to one end of a second tensioning spring (654), and the other end of the second tensioning spring (654) is fixed to the bottom end of the inner wall of the second metal cylinder (650).

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