Adjustable recline lumbar device, chair back and seat

Abstract

The application discloses a lumbar support device with adjustable inclination, a chair back and a seat, the lumbar support device comprising a lumbar support body and a connecting seat, a rear side of the lumbar support body is recessed to form a rotating support groove, the connecting seat comprises a support part extending forward, the support part is located in the rotating support groove and movably connected to the lumbar support body, and the support part and the rotating support groove have a gap in the vertical direction, the gap forms a rotating gap, and the lumbar support body can be adjusted in inclination by rotating forward and backward relative to the support part through the rotating gap. The lumbar support device with adjustable inclination and the chair back provided by the application can adjust the inclination by a small amplitude of the lumbar support body relative to the support part through the rotating gap between the support part and the rotating support groove, so that the inclination is adjusted by the arc surface rotation of the mesh cloth, and the sitting experience of the seat is more comfortable.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to an adjustable lumbar support device, a chair back, and a seat. Background Technology

[0002] Mesh chairs, a common choice for modern offices and homes, are widely favored for their stylish and minimalist design and comfortable seating. The back frame of a mesh chair is covered with a layer of mesh fabric, which supports the user's back. The mesh fabric has good elasticity and breathability, resulting in a comfortable user experience. Furthermore, mesh chairs typically have a lumbar support integrated into the backrest, with the front side of the lumbar support fitting against the back of the mesh fabric to further enhance lumbar support. Moreover, some mesh chairs on the market now offer adjustable lumbar supports, allowing users to customize the height according to their body shape and sitting posture, making them even more practical.

[0003] However, to conform to the user's back, the support surface of the mesh fabric has an arc-shaped structure that bulges forward at the bottom. This means that if the lumbar support is adjusted up and down while maintaining the same posture, the front surface of the lumbar support cannot remain in contact with the mesh fabric. (See attached image) Figure 7 As shown, the upper side of the mesh fabric is tilted backward. When the lumbar support is adjusted upward while maintaining the same posture, the mesh fabric will be pushed forward by the lumbar support because the tilt of the lumbar support and the tilt of the mesh fabric are inconsistent. This results in the mesh fabric's support surface not fitting the user's back, leading to a poor sitting experience.

[0004] Therefore, how to maintain the adjustable tilt of the lumbar support during the lifting and lowering process has become the main problem that needs to be solved. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an adjustable lumbar support device and chair back. By forming a rotation gap between the support part and the rotating support groove, the lumbar support body can rotate slightly relative to the support part to adjust the tilt when squeezed by the mesh fabric. This allows the lumbar support body to adapt to the curved surface of the mesh fabric to adjust the tilt during the height adjustment process. The support surface of the mesh fabric can remain in close contact with the user's back, making the seating experience more comfortable.

[0006] The effect of this utility model is achieved as follows:

[0007] In a first aspect, this application provides an adjustable tilt lumbar support device, including a lumbar support body and a connecting seat. The rear side of the lumbar support body is recessed to form a rotating support groove. The connecting seat includes a support portion extending forward. The support portion is located in the rotating support groove and is movably connected to the lumbar support body. There is a gap between the support portion and the rotating support groove in the vertical direction. This gap forms a rotation gap. With the help of the rotation gap, the lumbar support body can rotate back and forth relative to the support portion to adjust the tilt.

[0008] Furthermore, the front end of the support part protrudes to form a locking head, and the bottom of the rotating support groove has a locking hole. The locking head passes through the locking hole, and the diameter of the locking hole is larger than that of the locking head, so that the lumbar support body can move relative to the locking head. The structure is small and simple, and the manufacturing cost is low.

[0009] Furthermore, the lumbar support body includes a front shell and a rear shell joined together. A rotating support groove is recessed on the rear shell, and a locking head passes through a locking hole into the rear shell. The front end of the locking head is detachably connected to a limiting component, and the rear shell is clamped between the support portion and the limiting component. This not only simplifies the installation and disassembly of the lumbar support body but also ensures a high connection strength and good stability between the lumbar support body and the support portion.

[0010] Furthermore, the front end of the support part is a semi-cylindrical structure, and the rotating support groove is a corresponding arc-shaped groove. This allows the lumbar support body to rotate only along the arc surface of the support part, that is, the lumbar support body can only rotate back and forth relative to the support part, restricting the rotation direction of the lumbar support body and making the rotation adjustment process of the lumbar support body smoother.

[0011] Furthermore, the rotation angle of the lumbar support body relative to the support part is 0-10°. The small-amplitude rotation adjustment of the lumbar support body relative to the support part not only allows for adjustable tilt of the lumbar support body but also ensures good connection stability between the lumbar support body and the support part.

[0012] Furthermore, the support section is an elastic element with elastic deformation capability. This not only allows the position of the lumbar support body in the front-back direction to change, thereby better conforming to the mesh fabric, but also provides more elastic support when the user leans against the lumbar support body, further enhancing the sitting experience.

[0013] Furthermore, the lumbar support body includes a front shell and a rear shell that are spliced ​​together. The front shell and the rear shell are detachably connected by a hook structure. The hook structure includes a hook and a slot that engage with each other. The hook is located in one of the front shell and the slot is located in the other. This not only makes the installation and removal of the front shell and the rear shell more convenient, but also ensures a high connection strength and good stability between the two.

[0014] Furthermore, the adjustable lumbar support device includes two symmetrical lumbar support bodies, with a connecting seat extending forward to form two support sections on the left and right sides, respectively. This provides softer and more comfortable support for the user's lower back, further enhancing the sitting experience.

[0015] Secondly, this application provides a chair back, with a back frame connected to the front side of a back support. The back frame is configured as a mesh fabric cover, and the back frame has a lowerly protruding arc-shaped structure, so that the front end face of the mesh fabric is an arc-shaped surface. The connecting seat is slidably connected to the back support in the vertical direction, causing the lumbar support body to slide up and down relative to the back support, and making the front end face of the lumbar support body fit against the mesh fabric. With the help of the rotation gap, the lumbar support body can rotate back and forth relative to the support to adjust the tilt, so that the tilt of the lumbar support body can adapt to the change of the arc surface of the mesh fabric.

[0016] Furthermore, a positioning post protrudes from the back support, and a vertically extending groove is formed in the connecting seat. The connecting seat slides up and down relative to the positioning post through the groove. The sliding range of the connecting seat is limited by the sliding of the positioning post within the groove, making the height adjustment operation of the connecting seat more stable.

[0017] Furthermore, this utility model provides a seat, including the backrest as described above.

[0018] The adjustable tilt lumbar support device and chair back provided in this application, by forming a rotation gap between the support part and the rotation support groove, allows the lumbar support body to rotate relative to the support part to adjust the tilt, so that the lumbar support body can adapt to the curved surface of the mesh fabric to adjust the tilt.

[0019] Furthermore, the connecting seat causes the lumbar support body to slide up and down relative to the back support. As the lumbar support body slides up and down, following the curved surface of the mesh fabric, the lumbar support body is compressed by the mesh fabric. With the help of the rotation gap, the lumbar support body rotates slightly relative to the support part to adjust the tilt. This ensures that the lumbar support body can always maintain an adjustable tilt during the height adjustment process, thus preventing the lumbar support body from squeezing and deforming the mesh fabric. The support surface of the mesh fabric can remain in close contact with the user's back, making the seating experience more comfortable. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 A three-dimensional structural diagram of the mesh chair provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the connection structure between the connector and the back support provided in an embodiment of this application;

[0023] Figure 3 A schematic diagram of the connection structure between the front housing and the rear housing provided in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the connection structure between the connector and the rear housing provided in an embodiment of this application;

[0025] Figure 5 A schematic diagram of the connection structure between the support part and the lumbar support body when the lumbar support body is in a lower position according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the connection structure between the support part and the lumbar support body when the lumbar support body is in a higher position according to an embodiment of this application.

[0027] Figure 7 A schematic diagram illustrating the change process of the mesh fabric during the lifting and lowering of the lumbar support in the prior art provided in this application embodiment.

[0028] The reference numerals in the attached drawings are as follows: 1-waist support body, 101-rotation gap, 110-rear housing, 111-rotation support groove, 112-slot hole, 113-slot hook, 120-front housing, 121-slot groove, 2-connecting seat, 201-slide groove, 210-support part, 220-slot head, 221-limiting part, 222-shield, 230-operating part, 3-back bracket, 310-positioning post, 4-mesh fabric, 5-back frame. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0030] Please refer to the attached document. Figure 1-6 This application provides an adjustable tilt lumbar support device, including a lumbar support body 1 and a connecting seat 2. The rear side of the lumbar support body 1 is recessed to form a rotating support groove 111. The connecting seat 2 includes a forward-extending support part 210. The support part 210 is located in the rotating support groove 111 and is movably connected to the lumbar support body 1. There is a gap in the vertical direction between the support part 210 and the rotating support groove 111. This gap forms a rotation gap 101. With the help of the rotation gap 101, the lumbar support body 1 can rotate back and forth relative to the support part 210 to adjust the tilt.

[0031] In this embodiment, by forming a rotation gap 101 between the support portion 210 and the rotating support groove 111, the lumbar support body 1 can rotate relative to the support portion 210 to adjust its tilt. This allows the lumbar support body 1 to adapt to the curved surface of the mesh fabric 4, thus ensuring that the lumbar support body 1 always remains in contact with the mesh fabric 4, preventing the mesh fabric 4 from being squeezed and deformed, resulting in a more comfortable seating experience. With the help of the rotation gap 101, the lumbar support body 1 can also conform to and adapt to the user's lumbar curve, allowing it to more comprehensively fit the user's waist and providing a more comfortable seating experience.

[0032] Please refer to the attached document. Figure 5-6 In some embodiments of this application, the front end of the support 210 protrudes to form a locking head 220, and the bottom of the rotating support groove 111 is provided with a locking hole 112. The locking head 220 passes through the locking hole 112, and the diameter of the locking hole 112 is larger than that of the locking head 220, so that the waist support body 1 can move relative to the locking head 220.

[0033] In this embodiment, the lumbar support body 1 can move relative to the support part 210 by means of a relatively wide card hole 112 fitted onto the card head 220. The card head 220 can move slightly within the card hole 112, thereby making the lumbar support body 1 movable relative to the support part 210. The structure is small and simple, and the manufacturing cost is low.

[0034] Of course, in other embodiments of this application, the support 210 may also be hinged to the lumbar support body 1 via a pivot.

[0035] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the lumbar support body 1 includes a front shell 120 and a rear shell 110 spliced ​​together. A rotating support groove 111 is formed in the rear shell 110. A clip 220 passes through the clip hole 112 and extends out of the rear shell 110. The front end of the clip 220 is detachably connected to a limiting member 221. The rear shell 110 is clamped between the support part 210 and the limiting member 221.

[0036] In this embodiment, when installing the lumbar support body 1, the rear housing 110 can first be fitted with the clip 220, followed by the upper limit piece 221, preventing the rear housing 110 from detaching from the support part 210. Then, the front housing 120 is installed onto the rear housing 110, thus connecting the lumbar support body 1 to the support part 210. Conversely, disassembly can also be achieved. This not only simplifies the installation and disassembly of the lumbar support body 1, but also ensures a high connection strength and good stability between the lumbar support body 1 and the support part 210.

[0037] Preferably, the limiting member 221 is a screw, which is detachably connected to the clamp head 220 by means of a threaded connection, making installation and disassembly convenient. In addition, a gasket 222 is provided between the limiting member 221 and the rear housing 110, thereby further enhancing the stability of the connection between the limiting member 221 and the rear housing 110.

[0038] Please refer to the attached document. Figure 4 In some embodiments of this application, the front end of the support part 210 is a semi-cylindrical structure, and the rotating support groove 111 is a corresponding arc-shaped groove. This allows the lumbar support body 1 to rotate only along the arc surface of the support part 210, that is, the lumbar support body 1 can only rotate back and forth relative to the support part 210, which restricts the rotation direction of the lumbar support body 1 and makes the rotation adjustment process of the lumbar support body 1 more stable.

[0039] Please refer to the attached document. Figure 5-6 In some embodiments of this application, the rotation angle of the lumbar support body 1 relative to the support part 210 is 0-10°. The lumbar support body 1 is rotated slightly relative to the support part 210, so that the tilt of the lumbar support body 1 changes to fit the mesh fabric 4, while also making the connection stability between the lumbar support body 1 and the support part 210 better.

[0040] In some embodiments of this application, the support portion 210 is an elastic element with elastic deformation capability.

[0041] In this embodiment, the support part 210 can bend backward to produce elastic deformation when subjected to backward pressure. This not only allows the position of the lumbar support body 1 in the front-back direction to change, thereby further conforming to the mesh fabric 4, but also provides more elastic support when the user leans against the lumbar support body 1, further enhancing the sitting experience.

[0042] Please refer to the attached document. Figure 3 In some embodiments of this application, the lumbar support body 1 includes a front shell 120 and a rear shell 110 joined together. The front shell 120 and the rear shell 110 are detachably connected by a hook structure. The hook structure includes a hook 113 and a slot 121 that engage with each other. The hook 113 is located in one of the front shell 120 and the rear shell 110, and the slot 121 is located in the other of the front shell 120 and the rear shell 110. This not only makes the loading and unloading operation between the front shell 120 and the rear shell 110 more convenient, but also makes the connection between the two stronger and more stable.

[0043] Preferably, the front end of the rear housing 110 is provided with two symmetrical hooks 113, and the front housing 120 is provided with two corresponding slots 121, thereby further improving the connection strength between the front housing 120 and the rear housing 110.

[0044] Please refer to the attached document. Figure 1 In some embodiments of this application, there are two symmetrical waist support bodies 1, and a connecting seat 2 extends forward to form two left and right support parts 210. The two waist support bodies 1 are respectively connected to the support parts 210 on the left and right sides.

[0045] In this embodiment, two symmetrical lumbar support bodies 1 are provided to support the user's waist. Both lumbar support bodies 1 can be adjusted relative to the support part 210, providing softer and more comfortable support for the user's waist. Furthermore, as the support parts 210 on both sides elastically deform, the two lumbar support bodies 1 can hug and support the user's waist, further enhancing the sitting experience.

[0046] Of course, in other embodiments of this application, a single lumbar support body 1 can also be provided to support the user's back.

[0047] Please refer to the attached document. Figure 1-2 This application embodiment also provides a seat, including a back support 3 and an adjustable lumbar support device. A back frame 5 is connected to the front side of the back support 3. The back frame 5 is configured as a mesh fabric 4. The back frame 5 has an arc-shaped structure with a protruding lower part, so that the front end surface of the mesh fabric 4 is an arc surface with an arc. The connecting seat 2 is slidably connected to the back support 3 in the vertical direction, which drives the lumbar support body 1 to slide up and down relative to the back support 3, and makes the front end surface of the lumbar support body 1 fit against the mesh fabric 4. With the help of the rotation gap 101, the lumbar support body 1 can rotate back and forth relative to the support part 210 to adjust the tilt, so that the tilt of the lumbar support body 1 can adapt to the change of the arc surface of the mesh fabric 4.

[0048] In this embodiment, when the lumbar support body 1 slides up and down, as shown in the attached... Figure 5 and attached Figure 6 As shown, following the arc of the mesh fabric 4, after the lumbar support body 1 is squeezed by the mesh fabric 4, the lumbar support body 1 rotates slightly relative to the support part 210 to adjust the tilt angle with the help of the rotation gap 101. This allows the lumbar support body 1 to always remain in contact with the mesh fabric 4 during the height adjustment process, thereby preventing the lumbar support body 1 from squeezing and deforming the mesh fabric 4. The support surface of the mesh fabric 4 can remain in contact with the user's back, making the seating experience more comfortable.

[0049] Please refer to the attached document. Figure 2In some embodiments of this application, a positioning post 310 protrudes from the back support 3, and a vertically extending groove 201 is formed on the connecting seat 2. The connecting seat 2 slides up and down relative to the positioning post 310 through the groove 201. The sliding range of the connecting seat 2 is limited by the sliding of the positioning post 310 within the groove 201, making the height adjustment operation of the connecting seat 2 more stable. Furthermore, a screw is threaded to the front end of the positioning post 310, and the nut of the screw presses the connecting seat 2 tightly against the back support 3, making the height fixing operation of the connecting seat 2 also relatively simple.

[0050] Preferably, the left and right sides of the connecting seat 2 are symmetrically extended to form operating parts 230. The user can simultaneously move the operating parts 230 on both sides to drive the connecting seat 2 to slide. The user can move the protruding operating parts 230 up and down to control the connecting seat 2 to slide up and down, which further improves the ease of adjusting the height of the connecting seat 2 and makes the adjustment operation of the connecting seat 2 more stable and smooth.

[0051] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, 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 indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0052] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An adjustable tilt lumbar support device, characterized in that, The lumbar support body (1) and the connecting seat (2) are included. The rear side of the lumbar support body (1) is recessed to form a rotating support groove (111). The connecting seat (2) includes a support part (210) extending forward. The support part (210) is located in the rotating support groove (111) and is movably connected to the lumbar support body (1). There is a gap in the vertical direction between the support part (210) and the rotating support groove (111). This gap forms a rotation gap (101). With the help of the rotation gap (101), the lumbar support body (1) can rotate back and forth relative to the support part (210) to adjust the tilt.

2. The adjustable tilt lumbar support device according to claim 1, characterized in that, The front end of the support part (210) protrudes to form a locking head (220), and the bottom of the rotating support groove (111) is provided with a locking hole (112). The locking head (220) passes through the locking hole (112), and the diameter of the locking hole (112) is larger than that of the locking head (220), so that the waist support body (1) can move relative to the locking head (220).

3. The adjustable tilt lumbar support device according to claim 2, characterized in that, The lumbar support body (1) includes a front shell (120) and a rear shell (110) spliced ​​together. The rear shell (110) has a recessed rotating support groove (111). The locking head (220) passes through the locking hole (112) and extends out of the rear shell (110). The front end of the locking head (220) is detachably connected to a limiting member (221). The rear shell (110) is clamped between the support part (210) and the limiting member (221).

4. The adjustable tilt lumbar support device according to claim 1, characterized in that, The front end of the support part (210) is a semi-cylindrical structure, and the rotating support groove (111) is a corresponding arc-shaped groove.

5. The adjustable tilt lumbar support device according to claim 1, characterized in that, The rotation angle of the lumbar support body (1) relative to the support part (210) is 0-10°.

6. The adjustable tilt lumbar support device according to claim 1, characterized in that, The support part (210) is an elastic element with elastic deformation capability.

7. The adjustable tilt lumbar support device according to claim 1, characterized in that, The lumbar support body (1) includes a front shell (120) and a rear shell (110) spliced ​​together. The front shell (120) and the rear shell (110) are detachably connected by a hook structure. The hook structure includes a hook (113) and a slot (121) that engage with each other. The hook (113) is provided in one of the front shell (120) and the rear shell (110), and the slot (121) is provided in the other of the front shell (120) and the rear shell (110).

8. The adjustable tilt lumbar support device according to claim 1, characterized in that, The adjustable tilt lumbar support device includes two symmetrical lumbar support bodies (1), and the connecting seat (2) extends forward to form two left and right support parts (210). The two lumbar support bodies (1) are respectively connected to the support parts (210) on the left and right sides.

9. A chair back, characterized in that, The device includes a back support (3), a back frame (5), and an adjustable tilt lumbar support device as described in any one of claims 1-8. The back frame (5) is connected to the front side of the back support (3). The back frame (5) is configured as a mesh fabric (4). The back frame (5) has a lower protruding arc-shaped structure, so that the front end face of the mesh fabric (4) is an arc-shaped surface with an arc. The connecting seat (2) is slidably connected to the back support (3) in the vertical direction, driving the lumbar support body (1) to slide up and down relative to the back support (3), and making the front end face of the lumbar support body (1) fit against the mesh fabric (4). With the help of the rotation gap (101), the lumbar support body (1) can rotate back and forth relative to the support part (210) to adjust the tilt, so that the tilt of the lumbar support body (1) can adapt to the arc change of the mesh fabric (4).

10. The chair back according to claim 9, characterized in that, The back support (3) has a protruding positioning post (310), and the connecting seat (2) has a hollowed-out sliding groove (201) extending in the vertical direction. The connecting seat (2) slides up and down relative to the positioning post (310) through the sliding groove (201).

11. A type of seat, characterized by: Includes the chair back as described in claim 9 or 10.

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