Seat cushion with adjustable height and seat

Abstract

The utility model provides a height-adjustable seat back cushion and a seat, the height-adjustable seat back cushion comprises a back cushion body, the back surface of the upper end of the back cushion body is provided with a first connecting piece, and the first connecting piece extends along the height direction of the back cushion body; one end of each fixing belt is connected with the back cushion body, the other end of each fixing belt is detachably connected with the other end of the other fixing belt in the same pair of fixing belts, and the same pair of fixing belts are used for being wound on the back of a seat backrest so as to fix the back cushion body and a seat together; the lower end of the adjusting belt is connected with the upper end of the back cushion body, a second connecting piece is arranged on the back face of the upper end of the adjusting belt, the first connecting piece is detachably connected with the second connecting piece along any part of the height direction of the first connecting piece, and the adjusting belt is used for being wound on the surface of a headrest of a seat. The height position of the back cushion body on the seat can be adjusted.

Description

Technical Field

[0001] This application relates to the technical field of seat accessories, and particularly to an adjustable-height seat cushion and a seat. Background Art

[0002] Seat cushions are mainly used to improve the comfort of sitting postures, relieve lumbar pressure, and alleviate low back pain caused by sitting for a long time.

[0003] The Chinese utility model patent with the publication number CN216545877U discloses a detachable car seat cushion, which includes a cushion body, a seat cushion body, and a headrest with the same internal structure. The bottom end of the cushion body is rotatably connected to the top end of the seat cushion body. One edge of the headrest is arranged at the top end of the cushion body. Both the cushion body and the headrest are of a hollow structure. A first connecting part is arranged on one side surface of the headrest. The same set of second connecting parts are arranged on the side surface of the cushion body near the bottom end and the side surface of the seat cushion body near the bottom end. A baffle is arranged at the bottom end of the seat cushion body. Although the above detachable car seat cushion can improve the sitting comfort, since the position of the car seat cushion on the seat is fixed, the height of the seat cushion cannot be adjusted according to the usage needs of different users. Utility Model Content

[0004] The embodiments of this application provide an adjustable-height seat cushion and a seat to solve the problems existing in the related technologies. The technical solutions are as follows:

[0005] In a first aspect, the embodiments of this application provide an adjustable-height seat cushion, including:

[0006] An adjustment strap, the lower end of the adjustment strap is connected to the upper end of the cushion body. A second connecting part is provided on the back of the upper end of the adjustment strap. Any part of the first connecting part along its height direction is detachably connected to the second connecting part, and the adjustment strap is used to wind around the surface of the headrest of the seat; and

[0007] At least one pair of fixing straps. The two fixing straps in the same pair of fixing straps are respectively placed on the left and right sides of the adjustment strap or respectively placed on the left and right sides of the cushion body. One end of the fixing strap is connected to the cushion body, and the other end of the fixing strap is detachably connected to the other end of the other fixing strap in the same pair of fixing straps. The same pair of fixing straps are used to wind around the back of the seat headrest or the backrest to fix the cushion body and the seat together.

[0008] In an implementation manner, the at least one pair of fixing straps includes:

[0009] A pair of upper fixing straps, with one of the pair of upper fixing straps disposed on each of the left and right sides of the adjusting strap. The lower ends of the upper fixing straps are connected to the upper end of the cushion body. The upper end of one of the upper fixing straps is provided with a third connecting member, and the upper end of the other upper fixing strap is provided with a fourth connecting member, and the fourth connecting member is detachably connected to the third connecting member;

[0010] The back surface of the adjusting strap is provided with a fifth connecting member, which extends along the height direction of the adjusting strap, and any part along the length direction of the fifth connecting member is detachably connected to the second connecting member.

[0011] In one embodiment, the at least one pair of fixing straps includes:

[0012] A pair of middle fixing straps, with one of the pair of middle fixing straps disposed on each of the left and right sides of the cushion body. The first end in the length direction of the middle fixing strap is connected to one side in the width direction of the cushion body. The second end in the length direction of one of the middle fixing straps is provided with a sixth connecting member, and the second end in the length direction of the other middle fixing strap is provided with a seventh connecting member, and the seventh connecting member is detachably connected to the sixth connecting member.

[0013] In one embodiment, the number of the middle fixing straps is at least two pairs, and at least two pairs of the middle fixing straps are arranged at intervals along the height direction of the cushion body, and the seventh connecting member is detachably connected to the corresponding sixth connecting member.

[0014] In one embodiment, both the sixth connecting member and the third connecting member are female snap fasteners or the rough surface of Velcro, and both the seventh connecting member and the fourth connecting member are male snap fasteners or the hook surface of Velcro.

[0015] In one embodiment, the front surface of the upper end of the cushion body is provided with an eighth connecting member, and the eighth connecting member extends from the front surface of the upper end of the cushion body to the front surface of the adjusting strap;

[0016] The height-adjustable seat cushion further includes:

[0017] A headrest, the back surface of the headrest is provided with a ninth connecting member, and any part along the height direction of the eighth connecting member is detachably connected to the ninth connecting member.

[0018] In one embodiment, the eighth connecting member is the rough surface of Velcro or velvet, and the ninth connecting member is the hook surface of Velcro.

[0019] In one embodiment, the height-adjustable seat cushion further includes:

[0020] A lower fixing strap, the upper end of the lower fixing strap is connected to the lower end of the cushion body, and a tenth connecting member is provided at the lower end of the lower fixing strap, and the tenth connecting member is used for detachably connecting with the seat.

[0021] In one embodiment, the cushion body includes:

[0022] A lumbar cushion;

[0023] A back cushion, and the back cushion and the lumbar cushion are arranged one by one along the height direction of the cushion body.

[0024] In one embodiment, an anti-slip fabric is provided on the back surface of the cushion body, the anti-slip fabric extends from one side to the other side in the width direction of the cushion body, and the anti-slip fabric extends from the lower end to the upper end of the cushion body.

[0025] In a second aspect, an embodiment of the present application provides a seat, including the adjustable-height seat cushion described above.

[0026] The advantages or beneficial effects in the above technical solutions at least include:

[0027] For the adjustable-height seat cushion of the present utility model, during installation, place the cushion body on the front of the seat back, then first wrap the lower part of the adjusting strap around the front of the headrest of the seat from bottom to top, and then wrap the upper part of the adjusting strap around the back of the headrest of the seat from top to bottom. Then, pass the lower end of the adjusting strap through the gap between the headrest support rods (such as those of a car seat) and connect the second connecting member to the required position in the height direction of the first connecting member, so as to connect the upper end of the cushion body to the seat. Then, wind the same pair of fixing straps around the back of the seat back and detachably connect the same pair of fixing straps together, so as to reliably fix the cushion body on the seat and stably maintain it at the required height position. Among them, since any position along the height direction of the first connecting member is detachably connected to the second connecting member, by connecting the second connecting member to different positions in the height direction of the first connecting member, the length (i.e., height) of the adjusting strap can be adjusted, and the height position of the cushion body on the seat can be adjusted, so that the seat cushion can be suitable for users of different heights and improve the sitting comfort of users of different heights, and the use is more flexible and convenient.

[0028] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by referring to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the several views denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in accordance with the present application and should not be considered as limiting the scope of the present application.

[0030] Figure 1 Schematic diagram of the front structure of the seat cushion of the present utility model;

[0031] Figure 2 Schematic diagram of the back structure of the seat cushion of the present utility model;

[0032] Figure 3 Schematic diagram of the connection structure between the adjustment belt in the seat cushion of the present utility model and the headrest in the seat;

[0033] Figure 4 Schematic diagram of the connection structure between the adjustment belt in the seat cushion of the present utility model and the headrest in the seat;

[0034] Figure 5 Schematic diagram of the structure of the seat cushion of the present utility model installed on the seat;

[0035] Figure 6 Schematic diagram of the structure of the seat cushion of the present utility model installed on the seat.

[0036] Reference numerals

[0037] 1. Cushion body; 11. Lumbar cushion; 12. Back cushion; 2. First connecting member; 3. Lower fixing belt; 4. Tenth connecting member; 5. Adjustment belt; 6. Second connecting member; 7. Upper fixing belt; 8. Third connecting member; 9. Fourth connecting member; 10. Fifth connecting member; 20. Middle fixing belt; 30. Sixth connecting member; 40. Seventh connecting member; 50. Eighth connecting member; 60. Anti-slip fabric; 70. Headrest; 90. Headrest; 100. Support rod. Detailed implementation manners

[0038] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature and not restrictive.

[0039] See Figures 1 - 6 , which shows an adjustable-height seat cushion according to a preferred embodiment of the present utility model, including a cushion body 1, at least a pair of fixing belts, and an adjustment belt 5;

[0040] A first connecting member 2 is provided on the back surface of the upper end of the cushion body 1, and the first connecting member 2 extends along the height direction of the cushion body 1;

[0041] Two fixing straps in the same pair of fixing straps are respectively placed on the left and right sides of the adjusting strap or on the left and right sides of the cushion body. One end of the fixing strap is connected to the cushion body 1, and the other end of the fixing strap is detachably connected to the other end of the other fixing strap in the same pair of fixing straps. And the same pair of fixing straps is used to wind around the back of the seat headrest or the backrest to fix the cushion body 1 and the seat together;

[0042] The lower end of the adjusting strap 5 is connected to the upper end of the cushion body 1. A second connecting member 6 is provided on the back of the upper end of the adjusting strap 5. Any part of the first connecting member 2 in its height direction is detachably connected to the second connecting member 6. And the adjusting strap 5 is used to wind around the surface of the headrest 90 of the seat.

[0043] When installing the adjustable-height seat cushion of the present utility model, place the cushion body 1 on the front of the seat backrest. Then, first make the lower part of the adjusting strap 5 wrap around the front of the headrest 90 of the seat from bottom to top, and then make the upper part of the adjusting strap 5 wrap around the back of the headrest 90 of the seat from top to bottom. Then, pass the lower end of the adjusting strap 5 through the gap between the struts 100 (such as the headrest of a car seat) of the headrest 90 and connect the second connecting member 6 to the required part in the height direction of the first connecting member 2, so as to connect the upper end of the cushion body 1 to the seat. Then, wind the same pair of fixing straps around the back of the seat backrest and detachably connect the same pair of fixing straps together, so as to reliably fix the cushion body 1 on the seat and stably maintain it at the required height position. Among them, since any part of the first connecting member 2 in its height direction is detachably connected to the second connecting member 6, by connecting the second connecting member 6 to different parts in the height direction of the first connecting member 2, the length (i.e., height) of the adjusting strap 5 can be adjusted, and the height position of the cushion body 1 on the seat can be adjusted, so that the seat cushion can be suitable for users of different heights and improve the sitting comfort of users of different heights, and it is more flexible and convenient to use.

[0044] See Figures 2 - 4 , in an embodiment, the at least one pair of fixing straps includes:

[0045] A pair of upper fixing straps 7. The pair of upper fixing straps 7 are respectively placed on the left and right sides of the adjusting strap 5. The lower end of the upper fixing strap 7 is connected to the upper end of the cushion body 1. A third connecting member 8 is provided at the upper end of one of the upper fixing straps 7, and a fourth connecting member 9 is provided at the upper end of the other upper fixing strap 7. The fourth connecting member 9 is detachably connected to the third connecting member 8;

[0046] On the back surface of the adjustment strap 5, there is a fifth connecting member 10. The fifth connecting member 10 extends along the height direction of the adjustment strap 5, and any part of the fifth connecting member 10 along its length direction is detachably connected to the second connecting member 6. In this way, in the case where the seat does not have a headrest 90 support rod 100 (such as an office seat), a pair of upper fixing straps 7 can be respectively extended backward along the left and right sides of the headrest 90 to the lower back surface of the headrest 90, and then the fourth connecting member 9 and the third connecting member 8 are connected together to connect the pair of upper fixing straps 7 together, thereby fixing the upper end of the cushion body 1 to the seat. Then, the lower part of the adjustment strap 5 first wraps around the front surface of the headrest 90 of the seat from bottom to top, and then the upper part of the adjustment strap 5 wraps around the back surface of the headrest 90 of the seat from top to bottom. Then, the lower end of the adjustment strap 5 is passed through the pair of upper fixing straps 7 connected together from bottom to top, so that the second connecting member 6 is close to the back surface of the adjustment strap 5. Finally, the second connecting member 6 is connected to the required part in the height direction of the fifth connecting member 10, which can reliably limit the cushion body 1 to the required height position on the seat, increases the fixed connection method between the cushion body 1 and the headrest 90, enables the seat cushion to be applicable to both seats with a headrest 90 support rod 100 and seats without a headrest 90 support rod 100, has a wider application range, is beneficial to improving the utilization rate of the seat cushion, and can adjust the height position of the cushion body 1 on the seat.

[0047] In one embodiment, the at least one pair of fixing straps further includes:

[0048] A pair of middle fixing straps 20 are respectively disposed on the left and right sides of the cushion body 1. The first end in the length direction of the middle fixing strap 20 is connected to one side in the width direction of the cushion body 1. The second end in the length direction of one of the middle fixing straps 20 is provided with a sixth connecting member 30, and the second end in the length direction of the other middle fixing strap 20 is provided with a seventh connecting member 40. The seventh connecting member 40 is detachably connected to the sixth connecting member 30. By respectively passing the pair of middle fixing straps 20 around the back surface of the seat from one side in the width direction of the seat and connecting the seventh connecting member 40 to the sixth connecting member 30, the left and right sides of the cushion body 1 are connected to the seat, thereby reliably fixing the cushion body 1 to the seat and stably maintaining it at the required height position, and can effectively limit the sliding of the cushion body 1, and the structural reliability is higher.

[0049] In one embodiment, the number of the middle fixing straps 20 is at least two pairs. The at least two pairs of middle fixing straps 20 are spaced apart along the height direction of the cushion body 1, and the seventh connecting member 40 is detachably connected to the corresponding sixth connecting member 30 to improve the assembly stability of the cushion body 1.

[0050] In this embodiment, the number of the middle fixing straps 20 is two pairs. In other embodiments, the number of the middle fixing straps 20 can be one pair or three pairs or more.

[0051] In one embodiment, the second connecting member 6 is a hook surface of Velcro;

[0052] Both the first connecting member 2 and the fifth connecting member 10 are loop surfaces of Velcro, or both the first connecting member 2 and the fifth connecting member 10 are velvet, so as to realize the detachable connection between the second connecting member 6 and the first connecting member 2 and the detachable connection between the second connecting member 6 and the fifth connecting member 10. The structure is simple and practical, and the disassembly and assembly are convenient.

[0053] In other embodiments, when the second connecting member 6 is a hook surface of Velcro, both the first connecting member 2 and the fifth connecting member 10 can also be other loop surface structures that can be adhesively matched with the hook surface of Velcro.

[0054] In other embodiments, the second connecting member 6 can be a male buckle, and both the first connecting member 2 and the fifth connecting member 10 can include a plurality of female buckles. The plurality of female buckles are arranged in sequence along the height direction of the cushion body 1. By matching the male buckle with any one of the corresponding female buckles, the detachable connection between the second connecting member 6 and the first connecting member 2 and the detachable connection between the second connecting member 6 and the fifth connecting member 10 can also be realized, and the height position of the cushion body 1 on the seat can be adjusted.

[0055] In one embodiment, both the sixth connecting member 30 and the third connecting member 8 are female snap fasteners, and both the seventh connecting member 40 and the fourth connecting member 9 are male snap fasteners. By matching the female snap fastener with the corresponding male snap fastener, the sixth connecting member 30 and the seventh connecting member 40 are detachably connected together, and the third connecting member 8 and the fourth connecting member 9 are detachably connected together. The structure is simple and practical, and the disassembly and assembly are convenient.

[0056] In other embodiments, both the sixth connecting member 30 and the third connecting member 8 can be loop surfaces of Velcro, and both the seventh connecting member 40 and the fourth connecting member 9 can be hook surfaces of Velcro. By matching the hook surface of Velcro with the corresponding loop surface of Velcro, the sixth connecting member 30 and the seventh connecting member 40 can also be detachably connected together, and the third connecting member 8 and the fourth connecting member 9 can be detachably connected together.

[0057] In other embodiments, both the sixth connecting member 30 and the third connecting member 8 can be female buckles, and both the seventh connecting member 40 and the fourth connecting member 9 can be male buckles. By matching the male buckle with the corresponding female buckle, the sixth connecting member 30 and the seventh connecting member 40 can also be detachably connected together, and the third connecting member 8 and the fourth connecting member 9 can be detachably connected together.

[0058] See Figure 1 , in one embodiment, an eighth connecting member 50 is provided on the front surface of the upper end of the cushion body 1, and the eighth connecting member 50 extends from the front surface of the upper end of the cushion body 1 to the front surface of the adjusting belt 5;

[0059] The height - adjustable seat cushion further includes:

[0060] A headrest 70, on the back of which there is a ninth connecting member (not shown in the figure), and any part of the eighth connecting member 50 in its height direction is detachably connected to the ninth connecting member. In this way, when the headrest 70 is needed, the headrest 70 can be installed at a position corresponding to the human head on the cushion body 1 or the adjusting strap 5. At the same time, by detachably connecting any part of the ninth connecting member in its height direction to the eighth connecting member 50, the height position of the headrest 70 on the cushion body 1 or the adjusting strap 5 can be adjusted, so as to meet the usage requirements of users with different heights.

[0061] In one embodiment, the eighth connecting member 50 is a loop surface of Velcro or velvet, and the ninth connecting member is a hook surface of Velcro. In this way, through the hook surface of Velcro and the corresponding loop surface of Velcro or velvet, the eighth connecting member 50 and the ninth connecting member are detachably connected together, with a simple and practical structure and convenient disassembly and assembly.

[0062] In other embodiments, when the ninth connecting member is a hook surface of Velcro, the eighth connecting member 50 can also be other loop - surface structures that can be adhesively matched with the hook surface of Velcro.

[0063] In other embodiments, the ninth connecting member can be a male buckle, and the eighth connecting member 50 can include a plurality of female buckles. The plurality of female buckles are arranged in sequence along the height direction of the cushion body 1. Through the cooperation of the male buckle and any corresponding female buckle, the detachable connection between the ninth connecting member and the eighth connecting member 50 can also be realized, and the height position of the headrest 70 can be adjusted.

[0064] In one embodiment, the height - adjustable seat cushion further includes:

[0065] A lower fixing strap 3, the upper end of which is connected to the lower end of the cushion body 1, and a tenth connecting member 4 is provided at the lower end of the lower fixing strap 3. The tenth connecting member 4 is used for detachably connecting with the seat, so as to connect the lower end of the cushion body 1 to the seat together, improving the assembly stability of the cushion body 1 on the seat.

[0066] In one embodiment, the tenth connecting member 4 can specifically be a chuck or a hook, and the cushion body 1 is fixedly connected to the seat by using the chuck or the hook, so as to reliably fix the lower end of the cushion body 1 on the seat.

[0067] In one embodiment, the lower fixing strap 3, the upper fixing strap 7 and the middle fixing strap 20 can all be elastic bands, so that the lengths of the lower fixing strap 3, the upper fixing strap 7 and the middle fixing strap 20 can all be adjusted. Of course, the lower fixing strap 3, the upper fixing strap 7 and the middle fixing strap 20 can also all be non - elastic connecting bands.

[0068] In one embodiment, the headrest 70 includes a pillowcase and a pillow core. The pillowcase wraps the pillow core. The pillowcase can be a structure made of materials such as leather, mesh fabric, knitted fabric, or woven fabric. The pillow core can be a structure made of any one or combination of sponge, memory foam, etc.

[0069] In one embodiment, the number of the lower fixing straps 3 is two. The two lower fixing straps 3 are arranged at intervals along the width direction of the cushion body 1 to improve the connection reliability between the lower end of the cushion body 1 and the seat.

[0070] Of course, in other embodiments, the number of the lower fixing straps 3 can be one or more than three, and can be specifically set according to actual needs.

[0071] In one embodiment, the cushion body 1 includes:

[0072] a lumbar cushion 11;

[0073] a back cushion 12. The back cushion 12 and the lumbar cushion 11 are arranged one by one along the height direction of the cushion body 1. That is, the cushion body 1 is a structure integrating a lumbar cushion and a back cushion, which can provide support for the user's waist and back.

[0074] In one embodiment, the cushion body 1 further includes a cushion cover that wraps the lumbar cushion 11 and the back cushion 12. Among them, the cushion cover can be a structure made of materials such as leather, mesh fabric, knitted fabric, or woven fabric. Both the lumbar cushion 11 and the back cushion 12 can be structures made of any one or combination of sponge, memory foam, etc.

[0075] In one embodiment, an anti-slip fabric 60 is provided on the back surface of the cushion body 1. The anti-slip fabric 60 extends from one side to the other side in the width direction of the cushion body 1, and the anti-slip fabric 60 extends from the lower end to the upper end of the cushion body 1. In this way, by fitting the anti-slip fabric 60 with the front surface of the seat back, the friction force can be increased to play an anti-slip role, restricting the downward sliding of the cushion body 1, so that the cushion body 1 can be more reliably maintained at the set height position on the seat.

[0076] A preferred embodiment of the present utility model provides a seat, including the above-mentioned seat cushion with adjustable height.

[0077] For the seat of the present utility model, since the above-mentioned seat cushion is adopted, the length (i.e., height) of the adjusting strap 5 can also be adjusted. At the same time, since the lower fixing strap 3 can be tightened or loosened, the lower fixing strap 3 can adaptively adjust its own length with the change of the length of the adjusting strap 5, so as to adjust the height position of the cushion body 1 on the seat, making the seat cushion applicable to users of different heights and improving the sitting comfort of users of different heights, and making the use more flexible and convenient.

[0078] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0079] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0080] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of various changes or substitutions, and these should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An adjustable-height seat cushion, characterized in that, Comprising: A cushion body, on the back surface of the upper end of the cushion body, a first connecting member is provided, and the first connecting member extends along the height direction of the cushion body; An adjusting strap, the lower end of the adjusting strap is connected to the upper end of the cushion body, on the back surface of the upper end of the adjusting strap, a second connecting member is provided, any part of the first connecting member along its height direction is detachably connected to the second connecting member, and the adjusting strap is used for being wound around the surface of the headrest of a seat; and At least one pair of fixing straps, in the same pair of fixing straps, two fixing straps are respectively placed on the left and right sides of the adjusting strap or respectively placed on the left and right sides of the cushion body, one end of the fixing strap is connected to the cushion body, the other end of the fixing strap is detachably connected to the other end of the other fixing strap in the same pair of fixing straps, and the same pair of fixing straps is used for being wound around the back of the seat headrest or the backrest to fix the cushion body and the seat together.

2. The adjustable-height seat cushion according to claim 1, wherein, The at least one pair of fixing straps includes: A pair of upper fixing straps, the pair of upper fixing straps are respectively placed on the left and right sides of the adjusting strap, the lower ends of the upper fixing straps are connected to the upper end of the cushion body, on the upper end of one of the upper fixing straps, a third connecting member is provided, on the upper end of the other upper fixing strap, a fourth connecting member is provided, and the fourth connecting member is detachably connected to the third connecting member; On the back surface of the adjusting strap, a fifth connecting member is provided, the fifth connecting member extends along the height direction of the adjusting strap, and any part of the fifth connecting member along its length direction is detachably connected to the second connecting member.

3. The adjustable-height seat cushion according to claim 2, wherein The at least one pair of fixing straps further includes: A pair of middle fixing straps, the pair of middle fixing straps are respectively placed on the left and right sides of the cushion body, the first end in the length direction of the middle fixing strap is connected to one side in the width direction of the cushion body, on the second end in the length direction of one of the middle fixing straps, a sixth connecting member is provided, on the second end in the length direction of the other middle fixing strap, a seventh connecting member is provided, and the seventh connecting member is detachably connected to the sixth connecting member.

4. The adjustable-height seat cushion according to claim 3, wherein, Both the sixth connecting member and the third connecting member are female snap fasteners or the fuzzy surface of Velcro, and both the seventh connecting member and the fourth connecting member are male snap fasteners or the hooked surface of Velcro.

5. The adjustable-height seat cushion according to claim 2, wherein, The second connecting member is the hooked surface of Velcro; Both the first connecting member and the fifth connecting member are the fuzzy surface of Velcro, or both the first connecting member and the fifth connecting member are velvet.

6. The adjustable-height seat cushion according to claim 1, characterized in that, On the front surface of the upper end of the cushion body, an eighth connecting member is provided, and the eighth connecting member extends from the front surface of the upper end of the cushion body to the front surface of the adjusting strap; The adjustable-height seat cushion further includes: A headrest, on the back surface of the headrest, a ninth connecting member is provided, and any part of the eighth connecting member along its height direction is detachably connected to the ninth connecting member.

7. The height-adjustable seat cushion according to claim 6, characterized in that, The eighth connecting member is the fuzzy surface of Velcro or velvet, and the ninth connecting member is the hooked surface of Velcro.

8. The adjustable-height seat cushion according to claim 1, wherein, The adjustable-height seat cushion further includes: A lower fixing strap, the upper end of the lower fixing strap is connected to the lower end of the cushion body, and at the lower end of the lower fixing strap, a tenth connecting member is provided, and the tenth connecting member is used for being detachably connected to the seat.

9. The adjustable-height seat cushion according to claim 1, characterized in that, The cushion body includes: a lumbar cushion; a back cushion, and the back cushion and the lumbar cushion are arranged one by one along the height direction of the cushion body; a non-slip fabric is provided on the back surface of the cushion body, and the non-slip fabric extends from one side in the width direction of the cushion body to the other side, and the non-slip fabric extends from the lower end to the upper end of the cushion body.

10. Seat, characterized in that, It includes the adjustable-height seat cushion according to any one of claims 1-9.

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