Foldable waist-protecting cushion

Abstract

The foldable waist-protecting cushion comprises a cushion part, a backrest part and a first adjusting mechanism, the backrest part comprises a base plate which is rotationally connected with the cushion part, a movable bracket and a suspension backrest; the first adjusting mechanism comprises an adjusting part which can drive the movable support to move up and down. According to the foldable waist protection cushion, the base plate of the backrest part is rotationally connected with the cushion part, so that the cushion can be switched between a storage state and a use state, and the cushion is convenient to use or store and carry; furthermore, by arranging a first adjusting mechanism, the suspension backrest of the backrest part is driven to move in the preset direction, and therefore the personal preference requirements of different users are met. Besides, when the user adopts a sitting posture, the user has a stronger willingness of abutting against the suspension backrest through the back abutting against the suspension backrest of the cushion, so that the probability of humpback, myopia and other diseases caused by forward leaning of the sitting posture of the user can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of seating, specifically to a foldable lumbar support cushion. Background Technology

[0002] Seat cushions are mats that make people more comfortable when sitting. With the updates and iterations of seat cushions, seat cushion products with backrests and support have gradually emerged. Due to their support function, seat cushions, through curved surfaces and other structures, have also developed a certain degree of posture correction function.

[0003] Currently available seat cushions are designed to soothe a user's back or help correct their posture by providing back support. However, these cushions still present some inconveniences in terms of storage and transport.

[0004] Therefore, there is a need to provide a foldable lumbar support cushion. Summary of the Invention

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A foldable lumbar support cushion includes a seat cushion portion 1 and a backrest 2; it also includes a first adjustment mechanism 3; the backrest 2 includes a base plate 21, which is rotatably connected to the seat cushion portion 1, so that the backrest 2 has a storage state close to the seat cushion portion 1 and a use state at an angle to the seat cushion portion 1; a movable support 23, which is rotatably connected to the base plate 21; a suspended backrest 22, which is connected to the movable support 23; the first adjustment mechanism 3 connects the base plate 21 and the movable support 23, and includes an adjustment member 31, which is rotatably connected to the base plate 21 or rotatably connected to the movable support 23. Rotating the adjustment member 31 can drive the movable support 23 to move up and down.

[0007] Furthermore, a connecting skirt 11 is provided on the seat cushion 1 toward the backrest 2; at least one hinge tooth 12 is provided on the connecting skirt 11; a hinge hole 212 is provided on the base plate 21, and the hinge tooth 12 is rotatably disposed in the hinge hole 212 via a rotating shaft.

[0008] Furthermore, a boss 213 protrudes from the side of the substrate 21 facing away from the floating backrest 22; the hinge hole 212 extends from the substrate 21 to the boss 213; the hinge tooth 12 is hinged to the boss 213 via a rotating shaft.

[0009] Furthermore, the connecting skirt 11 is an arc-shaped panel that curves outward from bottom to top and tapers inward on both sides; an arc-shaped extension cover 211 extends from the lower side of the substrate 21 and is adapted to the top shape of the connecting skirt 11; the hinge hole 212 is at least partially located on the extension cover 211.

[0010] Furthermore, a set of hinge teeth 12 is provided on the left and right sides of the connecting skirt 11, and a set of hinge holes 212 is provided on the left and right sides of the substrate 21; an extension edge 111 is provided on the connecting skirt 11, located between the two sets of hinge teeth 12, and the top of the extension edge 111 is higher than the bottom of the extension cover 211.

[0011] Furthermore, a latch 24 is provided on the side of the extended cover 211 facing the seat cushion 1; the latch 24 is provided with a fastening groove 241; the fastening groove 241 cooperates with the top edge of the connecting skirt 11 to maintain the backrest 2 in its working state.

[0012] Furthermore, the mounting hole 215 is provided on the substrate 21, and the mounting hole 215 is inclined in the vertical direction; the adjusting member 31 is connected to the mounting hole 215, including an operating part 312 and an adjusting part 311, which are respectively located at both ends of the mounting hole 215; the adjusting part 311 is provided with a drive gear assembly, including one arc-shaped tooth 32, which is spirally distributed on the end face of the adjusting member 31 and forms an adjusting opening 321; the movable bracket 23 or the substrate 21 is provided with a transmission gear assembly, including a plurality of arrayed sub-tooth members 231. Rotating the adjusting member 31 can drive the arc-shaped tooth 32 to mesh with different sub-tooth members 231.

[0013] Furthermore, the sub-tooth member 231 is provided with a first self-locking surface 234, located at one end of the sub-tooth member 231 distributed along the moving direction, and the arc-shaped tooth 32 is provided with a second self-locking surface 322, located on the outer side of the arc-shaped tooth 32, which cooperates with the first self-locking surface 234 to maintain the relative position between the movable bracket 23 and the base plate 21; and / or the sub-tooth member 231 is provided with a first guide surface 235, located at the other end of the sub-tooth member 231 distributed along the moving direction, and the arc-shaped tooth 32 is provided with a second guide surface 323 that cooperates with the first guide surface 235.

[0014] Furthermore, the movable support 23 is slidably connected to the base plate 21, and the sliding direction of the movable support 23 is consistent with the direction in which the movable support 23 moves when driven by the adjusting member 31; a first guide slide portion 216 is provided on the left and right sides of the base plate 21; a second guide slide portion 232 that cooperates with the first guide slide portion 216 is provided on both sides of the movable support 23; a plurality of height marks 214 are provided on the side of the base plate 21 facing away from the suspended backrest 22, distributed along the length of the first guide slide portion 216; a vernier 233 suitable for indicating the height marks 214 is provided on the second guide slide portion 232.

[0015] Furthermore, it also includes a second adjustment mechanism 4; the second adjustment mechanism 4 includes an airbag assembly and several spring assemblies 5; two suspended backrests 22 are provided, respectively connected to the movable support 23; the two ends of the spring assembly 5 abut against the suspended backrest 22 and the movable support 23 respectively; the airbag assembly includes an airbag cushion 41 and a controller 42, one end of the airbag cushion 41 is connected to the movable support 23, and the other end faces the two suspended backrests 22; the controller 42 adjusts the gas density in the airbag cushion 41, thereby changing the degree of restriction on the elastic stroke of the spring assembly 5.

[0016] This utility model discloses a foldable lumbar support cushion. By rotating the base plate of the backrest to connect to the cushion part, the cushion can be easily switched between storage and use, making it convenient for use or storage and transportation. Furthermore, by setting a first adjustment mechanism, rotating the adjustment component can drive the suspended backrest of the backrest to move in a predetermined direction, thereby meeting the individual preferences of different users. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a foldable lumbar support cushion disclosed in Embodiment 1 of this utility model.

[0019] Figure 2 for Figure 1 Another perspective on the structure: structural diagram.

[0020] Figure 3 This is a schematic diagram of the structure of the backrest in the storage state in Embodiment 1.

[0021] Figure 4 This is a schematic diagram of the exploded structure of the seat cushion and backrest.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure along the central axis of the foldable lumbar support seat cushion.

[0023] Figure 6 for Figure 1 A schematic diagram of the structure in an explosion.

[0024] Figure 7 for Figure 6 A structural diagram from another perspective.

[0025] Figure 8This is a schematic diagram of the adjusting component.

[0026] Figure 9 This is a schematic diagram of the movable support structure;

[0027] Figure 10 This is a schematic diagram of the substrate structure.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Seat cushion; 11. Connecting skirt; 111. Extension edge; 12. Hinge tooth;

[0030] 2. Backrest; 21. Substrate; 211. Extension cover; 212. Hinge hole; 213. Boss;

[0031] 214. Height indicator; 215. Mounting hole; 216. First guide slide; 22. Floating backrest;

[0032] 23. Movable support; 231. Gear component; 232. Second guide slide; 233. Vernier caliper;

[0033] 234. First self-locking surface; 235. Second guide surface; 24. Lock; 241. Engagement groove;

[0034] 3. First adjusting mechanism; 31. Adjusting component; 32. Arc-shaped tooth; 311. Adjusting part; 312. Operating part;

[0035] 321. Adjusting opening; 322. Second self-locking surface; 323. Second guide surface;

[0036] 4. Second adjustment mechanism; 41. Airbag cushion; 42. Controller;

[0037] 5. Spring assembly. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature; "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] Terms such as “installation,” “connection,” “linking,” and “fixing” should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components, unless otherwise explicitly defined.

[0041] Terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These are used solely for the purpose of describing the technical solutions of this invention and do not imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. For example, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium; "above," "on top," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature; "below," "under," and "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] This invention provides a foldable lumbar support cushion, including a cushion portion 1 and a backrest 2; it also includes a first adjustment mechanism 3; the backrest 2 includes a base plate 21, which is rotatably connected to the cushion portion 1, so that the backrest 2 has a storage state close to the cushion portion 1 and a use state at an angle to the cushion portion 1; a movable support 23 is movably connected to the base plate 21; a suspended backrest 22 is connected to the movable support 23; the first adjustment mechanism 3 connects the base plate 21 and the movable support 23, and includes an adjustment member 31, which is rotatably connected to the base plate 21 or rotatably connected to the movable support 23. Rotating the adjustment member 31 can drive the movable support 23 to move up and down, thereby adjusting the height position of the suspended backrest.

[0043] When the cushion is not in use, rotate the backrest 2 so that it is close to the cushion part 1, forming a storage state, thereby reducing the space occupied by the cushion and making it convenient for storage or transportation.

[0044] When using this cushion, rotate the backrest 2 to change the backrest 2 from a state close to the cushion part 1 to a state where the backrest 2 and the cushion part 1 are at an angle; the angle between the backrest 2 and the cushion part 1 is less than or equal to 90 degrees, preferably 85-89 degrees.

[0045] The suspended backrest 22 is used to provide support for the user's back and / or waist. When it is necessary to adjust the suspended backrest 22 to suit different body types or preferences, the height position of the suspended backrest 22 can be changed by rotating the adjusting member 31 of the first adjusting mechanism 3 to move the suspended backrest 22 up and down.

[0046] The following embodiments will be described using the direct gear transmission backrest 2 of the adjusting member 31 as an example. Example

[0047] like Figure 1-10 As shown, this invention provides a preferred embodiment of a foldable lumbar support cushion, wherein the lower end of the base plate 21 of the backrest 2 is rotatably connected to the cushion portion 1.

[0048] The movable bracket 23 and the base plate 21 are slidably engaged. Specifically, a sliding part can be provided in the middle or both ends of the movable bracket 23, and a sliding groove can be provided on the base plate 21 to form a sliding engagement; or, a sliding groove can be provided in the middle or both ends of the movable bracket 23, and a sliding part can be provided on the base plate 21 to form a sliding engagement.

[0049] The floating backrest 22 is connected to the side of the movable support 23 away from the base plate 21. Preferably, the floating backrest 22 is provided with several cushions, which are arranged in sequence and connected to the movable support 23. The cushions are connected to the base plate 21 through the movable support 23 and are located on the side of the base plate 21 facing away from it, so that the cushions are suspended on the base plate 21.

[0050] Specifically, several cushions are arranged horizontally on the movable support 23. By adjusting the height of the movable support 23, the cushions can be adjusted in a coordinated manner. This eliminates the need to adjust the position of each cushion individually, allowing for quick adjustment of all cushions, simplifying the adjustment process, improving operational efficiency, and optimizing the user experience.

[0051] A connecting skirt 11 is provided on the seat cushion 1 towards the backrest 2; at least one hinge tooth 12 is provided on the connecting skirt 11; a hinge hole 212 is provided on the base plate 21, and the hinge tooth 12 is rotatably disposed in the hinge hole 212 via a rotating shaft.

[0052] Furthermore, a boss 213 protrudes from the side of the substrate 21 facing away from the suspended backrest 22; a hinge hole 212 extends from the substrate 21 to the boss 213; a hinge tooth 12 is hinged to the boss 213 via a pivot. In this embodiment, four hinge teeth 12 are provided, arranged in two groups, located on the left and right sides connecting the skirt 11; correspondingly, two hinge holes 212 and one boss 213 are provided on the left and right sides of the substrate 21, respectively, and each boss 213 is divided into three protrusions by two hinge holes 212; the hinge tooth 12 passes through the hinge hole 212 and passes through the boss 213 and the hinge tooth 12 via a pivot, realizing the rotatable connection between the seat cushion 1 and the backrest 2. In other embodiments, the positions of the hinge holes 212 and the hinge teeth 12 can be simply interchanged to achieve the same effect.

[0053] The connecting skirt 11 is an arc-shaped panel that curves outward from bottom to top and tapers inward on both sides, generally presenting an ellipsoidal semi-shell shape; an arc-shaped extension cover 211 extends from the lower side of the substrate 21 and is adapted to the shape of the top of the connecting skirt 11; the hinge hole 212 is at least partially located in the extension cover 211.

[0054] The extension cover 211 extends from the bottom left side of the base plate 21 to the bottom right side, and corresponds to the shape of the connecting skirt 11. The extension cover 211 is an arc-shaped cover plate, thereby providing better and more comprehensive support for the floating backrest 22.

[0055] Furthermore, to enhance the appearance, a clearance groove is provided on the outer side wall of the connecting skirt 11. When the backrest 2 is in use, the bottom edge of the extension cover 211 is at least partially or entirely located in the clearance groove, so that the extension cover 211 and the connecting skirt 11 form a visual effect of being integrated.

[0056] A set of hinge teeth 12 is provided on the left and right sides of the connecting skirt 11, and a set of hinge holes 212 is provided on the left and right sides of the base plate 21.

[0057] An extension edge 111 is provided on the connecting skirt 11, located between the two sets of hinge teeth 12. The top of the extension edge 111 is higher than the bottom of the extension cover 211. One purpose is to prevent the gap between the connecting skirt 11 and the extension cover 211 from pinching the user's fingers. Furthermore, the extension edge 111 can increase the contact area with the extension cover 211, which can make the support of the substrate 21 more stable.

[0058] Furthermore, a latch 24 is provided on the side of the extension cover 211 facing the seat cushion 1; the latch 24 is provided with a fastening groove 241; the fastening groove 241 cooperates with the top edge of the connecting skirt 11 to maintain the backrest 2 in use.

[0059] In this embodiment, the position of the latch 24 is correspondingly set between the two hinge teeth 12. Therefore, two latches 24 can be provided, respectively located on both sides of the bottom of the extension cover 211. The fastening groove 241 is preferably a concave arc-shaped groove or a V-shaped involute groove. The top edge of the connecting skirt 11 is located at least between the two hinge teeth 12 and has a raised arc surface or inverted V surface. When the backrest 2 is in use, the top edge of the connecting skirt 11 is locked in the fastening groove 241, thereby keeping the backrest 2 in use. When it needs to be adjusted to the storage state, the latch 24 can be released from the locking between the latch and the connecting skirt 11 by applying external force to the backrest 2 and rotating it towards the cushion surface.

[0060] Mounting holes 215 are provided on the substrate 21, and the mounting holes 215 are inclined in the vertical direction. Adjusting member 31 is connected to mounting holes 215 and includes an operating part 312 and an adjusting part 311, which are located at both ends of mounting holes 215 respectively. A drive gear set is provided on the adjusting part 311, including one arc-shaped tooth 32, which is spirally distributed on the end face of the adjusting member 31 and forms an adjusting opening 321. A transmission gear set is provided on the movable bracket 23 or the substrate 21, including several arrayed sub-tooths 231. Rotating the adjusting member 31 can drive the arc-shaped tooth 32 to mesh with different sub-tooths 231, thereby converting the force of rotating the adjusting member 31 into a thrust that moves the suspended backrest 22 in the vertical direction.

[0061] The drive gear set can be a continuous arc-shaped tooth 32, spiraling into a helix, or it can be multiple unconnected arc-shaped teeth 32 distributed along a spiral trajectory. As the adjusting member 31 rotates, the adjusting opening 321 feeds in and out the sub-tooth members 231 of the transmission gear set, thereby causing the arc-shaped tooth 32 to mesh with different sub-tooth members 231.

[0062] In this embodiment, the transmission gear set is connected to the movable bracket 23, and a plurality of sub-gears 231 are arranged in a vertical array on the side of the movable bracket 23 facing the substrate 21.

[0063] The rotating adjustment component 31 can drive the arc-shaped teeth 32 to engage with different sub-teeth 231. Specifically, by rotating the adjustment component 31, the adjustment opening 321 sequentially inserts and releases adjacent sub-teeth 231, thereby driving the movable support 23 to move along the direction of the array distribution of the sub-teeth 231. For example, in this embodiment, the sub-teeth 231 are distributed vertically on the movable support 23. By rotating the adjustment component 31, the driving teeth drive the sub-teeth 231, driving the movable support 23 to move vertically, thereby realizing the lifting and lowering adjustment of the suspended backrest 22.

[0064] The mounting hole 215 is inclined along the direction of movement of the suspended backrest. Preferably, the inclined direction of the mounting hole 215 intersects the inclined direction of the sub-tooth 231. For example, in this embodiment, the sub-tooth 231 is inclined downward, while the inclined direction of the mounting hole 215 is inclined upward. By using the inclined mounting hole 215, the spirally distributed arc-shaped teeth 32 are also inclined. Regardless of which direction the arc-shaped teeth 32 rotates, the lower arc-shaped teeth 32 can separate from the sub-tooth 231, disengaging and reducing mechanical friction or interference, thus improving the smoothness of the mechanism's operation. At the same time, the upper arc-shaped teeth 32 can always maintain engagement with the sub-tooth 231, driving the movement of the movable bracket 23 and performing self-locking limit after adjustment, ensuring the stability of the adjustment process and the result after adjustment, and improving the user experience of the product.

[0065] Furthermore, it also includes an inclined sleeve pad, suitable for filling the gap between the adjustment part 311 and the substrate 21, avoiding the unpleasant experience caused by the shaking of the adjustment part 31, and improving the product quality. The inclined sleeve pad includes a main pad portion, the thickness of which gradually increases along the inclined direction of the mounting hole 215, located between the adjustment part 311 and the substrate 21; and a sleeve portion, connecting the hole wall of the mounting hole 215, located between the adjustment part 31 and the mounting hole 215. In this embodiment, the cavity of the mounting hole 215 is inclined upward, and the main pad portion gradually increases in thickness from bottom to top along the vertical direction.

[0066] Furthermore, a first self-locking surface 234 and a second self-locking surface 322 are respectively provided on the sub-tooth component 231 and the arc-shaped tooth 32. The first self-locking surface 234 is provided on the sub-tooth component 231 and is located at one end of the sub-tooth component 231 distributed along the moving direction. The second self-locking surface 322 is provided on the arc-shaped tooth 32 and is located on the outer side of the arc-shaped tooth 32. In conjunction with the first self-locking surface 234, the relative position between the movable bracket 23 and the base plate 21 is maintained. And / or a first guide surface is provided on the sub-tooth component 231 and is located at the other end of the sub-tooth component 231 distributed along the moving direction. The second guide surface 323235 is provided on the arc-shaped tooth 32. In conjunction with the first guide surface, it is suitable for improving the smoothness of turning the adjusting component 31.

[0067] In this embodiment, the height position of the suspended backrest 22 relative to the seat cushion 1 is adjusted by the adjustment mechanism; the first self-locking surface 234 is disposed at the lower end of the sub-tooth member 231, and the first guide surface is located at the upper end of the sub-tooth member 231 and is distributed opposite to the first self-locking surface 234, so that while the arc-shaped tooth 32 engages with the sub-tooth member 231, it further has the function of locking and limiting, so that the suspended backrest 22 is locked at a certain height position.

[0068] Under its own gravity, the suspended proximity component causes the sub-tooth 231 on the movable bracket 23 to exert a downward force on the arc. The first self-locking surface 234 located at the lower end of the sub-tooth 231, together with the second self-locking surface 322 located outside the arc tooth 32, forms a locking limit fit, thereby achieving self-locking after height position adjustment.

[0069] The second guide surface 323235 is located on the inner side of the arc-shaped tooth 32, that is, on the side close to the center of the helix, and is distributed opposite to the second self-locking surface 322.

[0070] Preferably, the angle between the first self-locking surface 234 and the movable bracket 23 or the base plate 21 is not greater than 90 degrees, and the angle between the first guide surface and the movable bracket 23 or the base plate 21 is greater than 90 degrees, so that the sub-tooth 231 is inclined downward.

[0071] The movable bracket 23 is slidably connected to the base plate 21. The sliding direction is consistent with the direction of movement of the movable bracket 23 driven by the adjusting member 31, that is, parallel or coincident. A first guide slide portion 216 is provided on the left and right sides of the base plate 21. A second guide slide portion 232 that cooperates with the first guide slide portion 216 is provided on both sides of the movable bracket 23.

[0072] By sliding the movable bracket 23 to the base plate 21, the lifting and lowering adjustment of the suspended backrest 22 becomes smoother and more stable.

[0073] In this embodiment, a first guide slide 216 is provided on each of the two sides of the substrate 21. The guide slide is a groove or rail distributed in the vertical direction to adjust the height position of the suspended backrest 22. A second guide slide 232 extends from each end of the movable bracket 23 toward the substrate 21, so that the shape of the movable bracket 23 is n-shaped when viewed from above. The second guide slide 232 is accommodated in the first guide slide 216 and can slide in the first guide slide 216.

[0074] Furthermore, a plurality of height markers 214 are provided on the side of the substrate 21 facing away from the floating backrest 22, distributed along the length of the first guide slide 216; a vernier 233 suitable for indicating the height markers 214 is provided on the second guide slide 232, so that the user can have a more intuitive and clear feeling of adjusting the height of the floating backrest 22, and improve the user experience.

[0075] Furthermore, it also includes a second adjustment mechanism 4; the second adjustment mechanism 4 includes an airbag assembly and several spring assemblies 5; two suspended backrests 22 are provided, which are respectively connected to the movable brackets 23; the two ends of the spring assemblies 5 abut against the suspended backrests 22 and the movable brackets 23 respectively; the airbag assembly includes an airbag cushion 41 and a controller 42, one end of the airbag cushion 41 is connected to the movable brackets 23, and the other end faces the two suspended backrests 22; the controller 42 adjusts the gas density in the airbag cushion 41, thereby changing the degree of restriction on the elastic stroke of the spring assemblies 5.

[0076] The floating backrest 22 is connected to the movable support 23 via a connecting seat. A spring assembly 5 and a mounting sleeve are provided between the backrest and the connecting seat. The mounting sleeve is fitted on the outside of the spring assembly 5. One of the purposes is to increase the dimension of the floating backrest 22's movable direction, making it more in line with the curve of the human back, and optimizing the comfort and product effect.

[0077] The airbag cushion 41 is controlled by the controller 42 to change the amount of air inside the airbag cushion 41, thereby adjusting the degree of inflation of the airbag cushion 41. This can offset the elastic stroke of the spring assembly 5, ultimately allowing the user to personalize the range of motion of the suspended backrest 22 toward the base plate 21, thus improving the user experience of the product. Example

[0078] As a variation of the above embodiment one, the transmission gear set is provided on the base plate 21, and the adjusting member 31 is rotatably connected to the movable bracket 23.

[0079] Specifically, a strip-shaped through hole is formed in the middle of the substrate 21, and its length is distributed along the vertical direction. The adjusting member 31 passes through the strip-shaped through hole and is connected to the movable bracket 23. The adjusting member 31 is rotatably arranged relative to the movable bracket 23. For example, an assembly hole is provided in the movable bracket 23, and the adjusting member 31 is fixed by passing a screw through the assembly hole. This allows the adjusting member 31 to be rotatably connected to the movable bracket 23 and to drive the movable bracket 23 to move up and down along the strip-shaped through hole.

[0080] The aforementioned transmission gear set has several sub-gears 231 distributed vertically on the side of the base plate 21 facing away from the suspended backrest 22.

[0081] The rotating adjustment component 31 can drive the arc-shaped teeth 32 to mesh with different sub-teeth 231. Specifically, by rotating the adjustment component 31, the adjustment opening 321 sequentially inserts and releases adjacent sub-teeth 231, thereby driving the movable support 23 to move along the direction of the array distribution of sub-teeth 231, realizing the lifting and lowering adjustment of the suspended backrest 22. Example

[0082] As a variation of the above embodiment 1, the first adjustment mechanism 3 further includes a transmission frame; the transmission frame includes a movable platform, a movable bracket 23 connecting the movable platform, a connecting rod, and the two ends of the connecting rod are respectively connected to the base plate 21 and the movable platform. The connecting rod is driven by a drive gear set to drive the movable platform to move in a specific direction.

[0083] For example, the connecting rod is a lead screw, which is fixedly installed on the base plate 21; the movable table is threadedly connected to the lead screw; one end of the adjusting member is a worm gear, which is connected to the lead screw drive. Rotating the adjusting member drives the lead screw to rotate, thereby moving the movable table in the vertical direction.

[0084] Furthermore, the movable platform is slidably connected to the base plate 21, thereby reducing the swaying of the suspended backrest 22.

[0085] This utility model discloses a foldable lumbar support cushion. By rotating the base plate of the backrest to connect to the cushion part, the cushion can be easily switched between a storage state and a use state, making it convenient for use or storage and transportation. Furthermore, by setting a first adjustment mechanism, rotating the adjustment component can move the suspended backrest of the backrest in a predetermined direction, thereby meeting the individual preferences of different users. In addition, when the user adopts a sitting posture, the suspended backrest of this cushion provides a certain forward and comfortable support by the user's back against the suspended backrest, making the user more willing to lean against the suspended backrest, thereby reducing the probability of hunchback, myopia and other diseases caused by forward-leaning posture.

[0086] The above embodiments only illustrate a portion of the implementation methods of the present invention. Any modifications, substitutions, and improvements made by those skilled in the art without departing from the inventive concept of the present invention, without creative effort, are all within the protection scope of the present invention.

Claims

1. A foldable lumbar support cushion, comprising a seat cushion portion (1) and a backrest portion (2); characterized in that: It also includes the first regulating mechanism (3); The backrest (2) includes a base plate (21), which is rotatably connected to the seat cushion (1), so that the backrest (2) has a storage state close to the seat cushion (1) and a use state at an angle to the seat cushion (1); a movable bracket (23), which is movably connected to the base plate (21); and a floating backrest (22), which is connected to the movable bracket (23). The first adjustment mechanism (3) connects the base plate (21) and the movable support (23), and includes an adjustment member (31). The adjustment member (31) is rotatably connected to the base plate (21) or rotatably connected to the movable support (23). Rotating the adjustment member (31) can drive the movable support (23) to move up and down.

2. The foldable lumbar support cushion according to claim 1, characterized in that, A connecting skirt (11) is provided on the seat cushion (1) in the direction of the backrest (2); At least one hinge tooth (12) is provided on the connecting skirt (11); The substrate (21) is provided with a hinge hole (212), and the hinge tooth (12) is rotatably disposed in the hinge hole (212) via a rotating shaft.

3. The foldable lumbar support cushion according to claim 2, characterized in that, A boss (213) protrudes from the side of the substrate (21) facing away from the floating backrest (22). The hinge hole (212) extends from the substrate (21) to the boss (213). The hinge tooth (12) is hinged to the boss (213) via a rotating shaft.

4. The foldable lumbar support cushion according to claim 3, characterized in that, The connecting skirt (11) is an arc-shaped panel that curves outward from bottom to top and converges inward on both sides. An arc-shaped extension cover (211) extends from the underside of the substrate (21) and conforms to the top shape of the connecting skirt (11). The hinge hole (212) is at least partially located in the extension cover (211).

5. The foldable lumbar support cushion according to claim 4, characterized in that, A set of hinge teeth (12) is provided on the left and right sides of the connecting skirt (11), and a set of hinge holes (212) is provided on the left and right sides of the substrate (21). An extension edge (111) is provided on the connecting skirt edge (11), located between the two sets of hinge teeth (12). The top of the extended edge (111) is higher than the bottom of the extended cover (211).

6. The foldable lumbar support cushion according to claim 5, characterized in that, A latch (24) is provided on the side of the extension cover (211) facing the seat cushion (1). The latch (24) is provided with a latching groove (241); The fastening groove (241) engages with the top edge of the connecting skirt (11) to maintain the backrest (2) in its working state.

7. The foldable lumbar support cushion according to any one of claims 1-6, characterized in that, The mounting hole (215) provided on the substrate (21) is inclined in the vertical direction; The adjusting member (31) is connected to the mounting hole (215) and includes an operating part (312) and an adjusting part (311), which are located at both ends of the mounting hole (215); The adjustment part (311) is provided with a drive gear set, including one arc-shaped tooth (32), which is spirally distributed on the end face of the adjustment member (31) and forms an adjustment opening (321). The movable support (23) or the base plate (21) is provided with a transmission gear set, including a number of arrayed sub-tooth pieces (231). Rotating the adjusting member (31) can drive the arc-shaped tooth (32) to mesh with different sub-tooth pieces (231).

8. The foldable lumbar support cushion according to claim 7, characterized in that, The sub-tooth (231) is provided with a first self-locking surface (234) located at one end of the sub-tooth (231) distributed along the moving direction, and the arc-shaped tooth (32) is provided with a second self-locking surface (322) located on the outer side of the arc-shaped tooth (32). In conjunction with the first self-locking surface (234), the relative position between the movable bracket (23) and the base plate (21) is maintained. And / or a first guide surface (235) is provided on the sub-tooth (231) and located at the other end of the sub-tooth (231) distributed along the moving direction, and a second guide surface (323) is provided on the arc-shaped tooth (32) to cooperate with the first guide surface (235).

9. The foldable lumbar support cushion according to claim 7, characterized in that, The movable bracket (23) is slidably connected to the base plate (21), and the sliding direction of the movable bracket (23) is consistent with the direction in which the movable bracket (23) is moved by the adjusting member (31); A first guide slide portion (216) is provided on the left and right sides of the substrate (21). The movable bracket (23) is provided with a second guide slide (232) on both sides, which cooperates with the first guide slide (216); A plurality of height markings (214) are provided on the side of the substrate (21) facing away from the suspended backrest (22), and are distributed along the length of the first guide slide (216); The second guide slide (232) is provided with a vernier (233) suitable for indicating the height mark (214).

10. The foldable lumbar support cushion according to any one of claims 1-6, 8, and 9, characterized in that, It also includes a second regulating mechanism (4); The second adjustment mechanism (4) includes an airbag assembly and several spring assemblies (5); The suspended backrest (22) is provided in two parts, which are respectively connected to the movable bracket (23). The two ends of the spring assembly (5) abut against the suspended backrest (22) and the movable bracket (23), respectively. The airbag assembly includes an airbag cushion (41) and a controller (42). One end of the airbag cushion (41) is connected to the movable bracket (23), and the other end faces the two suspended backrests (22). The controller (42) adjusts the gas density in the airbag (41), thereby changing the degree of restriction on the elastic stroke of the spring assembly (5).

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