Adjustable lumbar support assembly and seat

Abstract

The utility model discloses an adjustable waist support assembly and seat, adjustable waist support assembly includes fixed seat, movable seat, waist support, support, drive mechanism, movable seat is placed in the front side of fixed seat, and the waist support is installed on movable seat, be provided with first sliding block on fixed seat, be provided with second sliding block on movable seat, the support is located between fixed seat and movable seat, and it includes first connecting rod, second connecting rod, and the middle part of first connecting rod and the middle part of second connecting rod articulate to make its both constitute X -shaped component, one end of first connecting rod articulates on first sliding block, and the other end articulates on movable seat, one end of second connecting rod articulates on second sliding block, and the other end articulates on fixed seat, the output of drive mechanism is connected in first sliding block or second sliding block to drive second sliding block, the utility model discloses simple and convenient adjustment process, can provide stable support for the waist of user, has promoted the comfort of waist support assembly.

Description

Technical Field

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

[0002] To alleviate fatigue caused by unsupported lower back movement, some gaming chairs and office chairs are equipped with lumbar support components. These components provide stable support for the user's lower back. Most lumbar support components are mounted on the backrest support, with the front support surface conforming to the user's lower back for support. To broaden the chair's applicability, some existing lumbar support components are designed to be adjustable, changing the fore-and-aft position of the support surface via an adjustment mechanism. While these adjustable lumbar support components can accommodate different sitting postures and heights, they usually require manual operation, which is inconvenient. Furthermore, when adjusting the lumbar support component, the existing adjustment mechanism, due to the need to withstand the backward pressure from the user's lower back, results in discontinuous adjustments between adjacent settings, meaning there is a certain distance between adjacent settings. This makes it difficult to precisely adjust the support surface of the lumbar support component to the optimal position. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable lumbar support component and seat, which is easy to operate and can improve the comfort of the lumbar support component while providing stable support for the user's waist.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An adjustable lumbar support assembly includes a fixed base, a movable base, a lumbar support, a bracket, and a drive mechanism;

[0006] The movable seat is placed in front of the fixed seat, and the waist support is installed on the movable seat; the fixed seat is provided with a first slider that can slide relative to the fixed seat in the vertical direction, and the movable seat is provided with a second slider that can slide relative to the movable seat in the vertical direction.

[0007] The bracket is located between the fixed seat and the movable seat, and includes a first link and a second link. The middle parts of the first link and the middle parts of the second link are hinged to form an X-shaped component. One end of the first link is hinged to the first slider and the other end is hinged to the movable seat. One end of the second link is hinged to the second slider and the other end is hinged to the fixed seat.

[0008] The output end of the drive mechanism is connected to the first slider to drive the first slider to move up and down relative to the fixed seat, or the output end of the drive mechanism is connected to the second slider to drive the second slider to move up and down relative to the movable seat.

[0009] Preferably, the device includes two brackets staggered in the left-right direction; the fixed base has a first track extending vertically on both sides, and a first slider is slidably mounted on each of the two first tracks, with one end of the first connecting rod of each bracket hinged to the two first sliders respectively; the movable base has a second track on both sides, and a second slider is slidably mounted on each of the two second tracks, with one end of the second connecting rod of each bracket hinged to the two second sliders respectively.

[0010] Preferably, the first track is a sliding groove disposed on both sides of the fixed seat, the openings of the two sliding grooves are arranged opposite each other, the two first sliders are slidably embedded in the two sliding grooves respectively, and the bottom of the two sliding grooves is fixed with a first bearing seat respectively; the movable seat includes a connecting beam extending in the left and right direction, the two second tracks are guide rods respectively installed at both ends of the connecting beam, the two second sliders are slidably sleeved on the two guide rods respectively, and the bottom of the two guide rods is fixed with a second bearing seat respectively; the upper end of the first connecting rod is hinged to the first slider and the lower end is hinged to the second bearing seat, the upper end of the second connecting rod is hinged to the second slider and the lower end is hinged to the first bearing seat.

[0011] Preferably, the connecting crossbeam is provided with a receiving groove that is recessed from its rear side to the front to accommodate the first connecting rod and the second connecting rod.

[0012] Preferably, the two ends of the connecting beam are slidably mounted on two guide rods so that the connecting beam can move up and down relative to the two guide rods. The guide rods are provided with multiple locking holes arranged vertically, and the connecting beam is provided with locking pins that match the locking holes. The waist support is connected to the connecting beam.

[0013] Preferably, a movable crossbeam is fixedly connected between the two first sliders, and the output end of the drive mechanism is connected to the middle of the movable crossbeam.

[0014] Preferably, the drive mechanism includes a motor, a reducer, a lead screw, and a lead screw nut. The reducer is connected between the output shaft of the motor and the lead screw. The lead screw extends in the vertical direction, and the lead screw nut is fixed in the middle of the movable crossbeam and sleeved on the lead screw.

[0015] Preferably, the bodies of both the motor and the reducer are fixed to a mounting plate, and the mounting plate is detachably fixed to the mounting base.

[0016] Preferably, the drive assembly includes a handle, a lead screw, and a lead screw nut. The lead screw extends in the vertical direction and is pivotally connected to a fixed base. The handle is connected to the lead screw to drive the lead screw to rotate. The lead screw nut is fixed to the middle of the movable crossbeam and sleeved on the lead screw.

[0017] The seat, including the aforementioned adjustable lumbar support assembly.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] In this invention, the movable seat and the fixed seat are connected by an X-shaped bracket. A drive mechanism drives one end of the first link or one end of the second link of the bracket to move in the vertical direction, thereby changing the shape of the X-shaped bracket in the front-back direction. This allows the movable seat to move the lumbar support in the front-back direction, achieving adjustment of the lumbar support. The adjustment process is simple and convenient. The X-shaped bracket provides stable support for the lumbar support, and the user can adjust the lumbar support to the most suitable position according to their body shape and sitting posture, improving the comfort of the lumbar support assembly. Attached Figure Description

[0020] Figure 1 This is an installation diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the present invention with the lumbar support omitted.

[0022] Figure 3 This is a schematic diagram of one usage state of the present invention;

[0023] Figure 4 This is a schematic diagram of another usage state of this utility model.

[0024] The components are as follows: 10. Fixed seat; 101. Slide groove; 102. Mounting plate; 11. Movable crossbeam; 12. First slider; 13. First shaft seat; 20. Movable seat; 21. Connecting crossbeam; 211. Storage groove; 22. Guide rod; 221. Locking hole; 23. Second slider; 24. Second shaft seat; 30. Waist support; 40. Bracket; 41. First connecting rod; 411. Upper end; 412. Lower end; 42. Second connecting rod; 421. Upper end; 422. Lower end; 51. Motor; 52. Reducer; 53. Transmission screw; 54. Screw nut. Detailed Implementation

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0026] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] like Figure 1 , 2 As shown in Figures 3 and 4, this utility model provides an adjustable lumbar support assembly, which is installed on the backrest support of a seat. Specifically, it includes a fixed seat 10, a movable seat 20, a lumbar support 30, a bracket 40, and a drive mechanism. The lumbar support 30, the movable seat 20, the bracket 40, and the fixed seat 10 are arranged sequentially from front to back. That is, the movable seat 20 is located in front of the fixed seat 10, the lumbar support 30 is installed in front of the movable seat 20, and the bracket 40 connects the movable seat 20 and the fixed seat 10. The fixed seat 10 is installed on the backrest support of the seat so that the lumbar support 30 faces the user's waist, and the support surface on the front of the lumbar support 30 provides support to the user's waist.

[0029] The fixed base 10 is provided with a first slider 12 that can slide relative to the fixed base 10 in the vertical direction, and the movable base 20 is provided with a second slider 23 that can slide relative to the movable base 20 in the vertical direction; the bracket 40 is an X-shaped component, which includes a first connecting rod 41 and a second connecting rod 42. The middle part of the first connecting rod 41 and the middle part of the second connecting rod 42 are hinged together to form an X-shaped component. The upper end 411 of the first connecting rod 41 is hinged to the first slider 12, and the lower end 412 is hinged to the movable base 20. The upper end 421 of the second connecting rod 42 is hinged to the second slider 23. The upper and lower ends are hinged to the fixed base 10. The output end of the drive mechanism is connected to the first slider 12, which is used to drive the first slider 12 to move relative to the fixed base 10 in the vertical direction. When the first slider 12 moves up and down under the drive of the drive mechanism, it drives the upper end 411 of the first connecting rod 41 to move up and down, so that the included angle between the first connecting rod 41 and the second connecting rod 42 changes. During the shape change process, the X-shaped component composed of the first connecting rod 41 and the second connecting rod 42 changes the interval distance between the movable base 20 and the fixed base 10, thereby realizing the forward and backward movement of the movable base 20.

[0030] In another embodiment of this utility model, the output end of the drive mechanism can be connected to the second slider 23, and the drive mechanism can be used to drive the second slider 23 to move up and down, thereby driving the upper end 421 of the second connecting rod 42 to move up and down. This can also achieve the shape change of the X-shaped component, and then realize the forward and backward movement of the movable seat 20.

[0031] In this invention, the movable seat 20 and the fixed seat 10 are connected by an X-shaped bracket 40. A drive mechanism drives one end of the first connecting rod 41 or one end of the second connecting rod 42 of the bracket 40 to move in the vertical direction, thereby changing the shape of the X-shaped bracket 40 in the front-back direction. This allows the movable seat 20 to move the lumbar support 30 in the front-back direction, enabling the lumbar support 30 to be adjusted forward and backward. The adjustment process is simple and convenient. The X-shaped bracket 40 provides stable support for the lumbar support 30, allowing the user to adjust the lumbar support 30 to the most suitable position according to their body shape and sitting posture, thus improving the comfort of the lumbar support assembly.

[0032] To provide more stable support for the movable seat 20, the present invention includes two brackets 40 staggered in the left and right directions, which provide support between the movable seat 20 and the fixed seat 10 on the left and right sides. The fixed seat 10 is provided with first rails extending vertically on both sides, and a first slider 12 is slidably installed on each of the two first rails. The upper ends 411 of the first connecting rods 41 of the two brackets 40 are respectively hinged to the two first sliders 12. The movable seat 20 is provided with a second rail on both sides, and a second slider 23 is slidably installed on each of the two second rails. The upper ends 421 of the second connecting rods 42 of the two brackets 40 are respectively hinged to the two second sliders 23.

[0033] The first track mentioned above is a sliding groove 101 disposed on both sides of the fixed base 10, with the openings of the two sliding grooves 101 facing each other. Two first sliders 12 are slidably embedded in the two sliding grooves 101 respectively. A first bearing seat 13 is fixed at the bottom of each of the two sliding grooves 101. The fixed base 10 can be a metal plate, and the two sliding grooves 101 are formed by bending the two sides of the fixed base 10. The movable base 20 includes a connecting beam 21 extending in the left-right direction, and two second tracks are two tracks respectively installed at both ends of the connecting beam 21. Guide rod 22, two guide rods 22 extend in the vertical direction, two second sliders 23 are slidably sleeved on the two guide rods 22 respectively, and a second bearing 24 is fixed at the bottom of the two guide rods 22 respectively; on the same side of the fixed seat 10 and the movable seat 20, the upper end 411 of the first connecting rod 41 is hinged to the first slider 12 and the lower end 412 is hinged to the second bearing 24, the upper end 421 of the second connecting rod 42 is hinged to the second slider 23 and the lower end 422 is hinged to the first bearing 13.

[0034] A receiving groove 211, recessed from its rear to the front, is provided on the connecting crossbeam 21. This receiving groove 211 is used to accommodate the first connecting rod 41 and the second connecting rod 42, especially in situations such as... Figure 3 In the state shown, the lumbar support 30 is located at the rearmost position, that is, the movable seat 20 is located at the position closest to the fixed seat 10. At this time, at least part of the first link 41 and the second link 42 are accommodated in the storage slot 211 to avoid interference between the first link 41 and the second link 42 and the connecting beam 21 on the movable seat 20, so that the movable seat 20 has a large stroke of forward and backward movement, thereby allowing the lumbar support 30 to be adjusted within a large range of forward and backward movement.

[0035] A movable crossbeam 11 is fixed between the two first sliders 12. The output end of the drive mechanism is connected to the middle of the movable crossbeam 11. The movable crossbeam 11 and the first sliders 12 can be assembled together by bolts or other components, or the two first sliders 12 can be integrally formed and set at both ends of the movable crossbeam 11. The drive mechanism is mounted on the fixed base 10 and located above the movable crossbeam 11, so that the drive mechanism drives the movable crossbeam 11 to move relative to the fixed base 10 in the vertical direction, thereby causing the two first sliders 12 to move synchronously relative to the fixed base 10 in the vertical direction.

[0036] The drive mechanism includes a motor 51, a reducer 52, a lead screw 53, and a lead screw nut 54. The input end of the reducer 52 is connected to the output shaft of the motor 51. The extension direction of the lead screw 53 is consistent with the height direction. The upper end of the lead screw 53 is connected to the output end of the reducer 52, so that the lead screw 53 extends downward from the reducer 52. The lead screw nut 54 is fixedly installed in the middle of the movable crossbeam 11 and is sleeved on the lead screw 53. When the motor 51 is started, the lead screw 53 rotates, which causes the lead screw nut 54 to drive the movable crossbeam 11 to move up and down. When the movable crossbeam 11 moves up and down, the vertical distance between the upper end 411 of the first connecting rod 41 and the lower end 422 of the second connecting rod 42 changes, thereby causing the lower end 412 of the first connecting rod 41 and the upper end 421 of the second connecting rod 42 to move back and forth.

[0037] In the above structure, the upper end 411 of the first connecting rod 41 is hinged to the first slider 12. The first slider 12 is driven to move up and down by the driving mechanism, changing the included angle between the first connecting rod 41 and the second connecting rod 42. The up and down movement of the first slider 12 is converted into the back and forth movement of the movable seat 20 by the X-shaped bracket 40. The first slider 12 is the active end of the entire mechanism.

[0038] Alternatively, the output end of the drive mechanism can be connected to the two second sliders 23, using the second sliders 23 as the active end of the entire mechanism. In other embodiments, the upper ends of the two connecting rods are directly hinged to the fixed seat 10 and the movable seat 20, respectively, and the lower ends of the two connecting rods are hinged to the sliders that can move up and down. The drive mechanism drives one of the sliders to move up and down from below, causing the X-shaped bracket 40 to deform, so as to realize the forward and backward movement of the movable seat 20.

[0039] To facilitate the assembly of the drive mechanism, in this utility model, the bodies of the motor 51 and the reducer 52 are both fixed on a mounting plate 102. The mounting plate 102 is detachably fixed to the fixed base 10. During assembly, after the motor 51 and the reducer 52 are connected to the mounting plate 102, the mounting plate 102 is fixed to the fixed base 10 using bolts.

[0040] In other embodiments of this utility model, the driving mechanism can also be manual, which includes a handle, a transmission screw and a screw nut. The transmission screw extends in the vertical direction and is pivotally connected to the fixed base 10. The handle is connected to the transmission screw. Rotating the handle can drive the transmission screw to rotate. The screw nut is fixed in the middle of the movable crossbeam 11 and is sleeved on the transmission screw.

[0041] In this invention, the transmission screw 53 and screw nut 54 work together to change the position of the movable crossbeam 11 in the vertical direction, thereby realizing the forward and backward movement of the lumbar support 30. The transmission screw 53 drives the movable crossbeam 11 to move to any height position, allowing the lumbar support 30 to stop at any position within its adjustment stroke, realizing stepless forward and backward adjustment of the lumbar support 30 and improving the accuracy of the forward and backward adjustment of the lumbar support 30. Furthermore, due to the reverse locking characteristic of the screw threads of the screw nut 54 and the transmission screw 53, the movable crossbeam 11 can remain relatively fixed with the fixed seat 10. Thus, when the lumbar support 30 is subjected to the backward pressure of the user's waist, the lumbar support 30 will not move abnormally, thereby enabling the lumbar support assembly to provide stable support for the user's waist.

[0042] In a preferred embodiment of this utility model, the lumbar support 30 is adjustable in the vertical direction. This can be achieved by movably connecting the crossbeam 21 and the two guide rods 22, installing the lumbar support 30 onto the crossbeam 21, allowing the lumbar support 30 to move freely relative to the guide rods 22 in the vertical direction along with the crossbeam 21. Multiple locking holes 221 are arranged vertically on the guide rods 22, and a locking pin matching the locking holes 221 is provided at the end of the crossbeam 21. When the vertical position of the lumbar support 30 needs to be adjusted, the locking pin disengages from the locking hole 221, allowing the lumbar support 30 to move vertically along with the crossbeam 21. After the vertical position of the lumbar support 30 is adjusted, the locking pin is inserted into the locking hole 221 at the corresponding height position, locking the crossbeam 21 and the guide rods 22.

[0043] The seat of this utility model includes the aforementioned adjustable lumbar support assembly. The other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0044] Finally, it should be noted that the above embodiments are only optional embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An adjustable lumbar support assembly, characterized in that, Includes a fixed base, a movable base, a lumbar support, a bracket, and a drive mechanism; The movable seat is placed in front of the fixed seat, and the waist support is installed on the movable seat; the fixed seat is provided with a first slider that can slide relative to the fixed seat in the vertical direction, and the movable seat is provided with a second slider that can slide relative to the movable seat in the vertical direction. The bracket is located between the fixed seat and the movable seat, and includes a first link and a second link. The middle parts of the first link and the middle parts of the second link are hinged to form an X-shaped component. One end of the first link is hinged to the first slider and the other end is hinged to the movable seat. One end of the second link is hinged to the second slider and the other end is hinged to the fixed seat. The output end of the drive mechanism is connected to the first slider to drive the first slider to move up and down relative to the fixed seat, or the output end of the drive mechanism is connected to the second slider to drive the second slider to move up and down relative to the movable seat.

2. The adjustable lumbar support assembly as described in claim 1, characterized in that, It includes two brackets offset in the left and right directions; the fixed base is provided with first rails extending vertically on both sides, and a first slider is slidably installed on each of the two first rails, and one end of the first connecting rod of the two brackets is respectively hinged to the two first sliders; the movable base is provided with second rails on both sides, and a second slider is slidably installed on each of the two second rails, and one end of the second connecting rod of the two brackets is respectively hinged to the two second sliders.

3. The adjustable lumbar support assembly as described in claim 2, characterized in that, The first track is a sliding groove set on both sides of the fixed seat, with the openings of the two sliding grooves facing each other. The two first sliders are slidably embedded in the two sliding grooves, and the bottom of the two sliding grooves is fixed with a first bearing seat. The movable seat includes a connecting beam extending in the left-right direction. The two second tracks are guide rods respectively installed at both ends of the connecting beam. The two second sliders are slidably sleeved on the two guide rods, and the bottom of the two guide rods is fixed with a second bearing seat. The upper end of the first connecting rod is hinged to the first slider and the lower end is hinged to the second bearing seat. The upper end of the second connecting rod is hinged to the second slider and the lower end is hinged to the first bearing seat.

4. The adjustable lumbar support assembly as described in claim 3, characterized in that, The connecting crossbeam is provided with a recessed groove that extends from its rear side forward to accommodate the first and second connecting rods.

5. The adjustable lumbar support assembly as described in claim 3, characterized in that, The two ends of the connecting beam are slidably mounted on two guide rods so that the connecting beam can move up and down relative to the two guide rods. The guide rods are provided with multiple lock holes arranged vertically, and the connecting beam is provided with locking pins that match the lock holes. The waist support is connected to the connecting beam.

6. The adjustable lumbar support assembly as described in claim 2, characterized in that, A movable crossbeam is fixedly connected between the two first sliders, and the output end of the drive mechanism is connected to the middle of the movable crossbeam.

7. The adjustable lumbar support assembly as described in claim 6, characterized in that, The drive mechanism includes a motor, a reducer, a lead screw, and a lead screw nut. The reducer is connected between the output shaft of the motor and the lead screw. The lead screw extends in the vertical direction, and the lead screw nut is fixed in the middle of the movable crossbeam and sleeved on the lead screw.

8. The adjustable lumbar support assembly as described in claim 7, characterized in that, The motor and reducer bodies are both fixed to a mounting plate, which is detachably fixed to the mounting base.

9. The adjustable lumbar support assembly as claimed in claim 6, characterized in that, The drive assembly includes a handle, a lead screw, and a lead screw nut. The lead screw extends vertically and is pivotally connected to a fixed base. The handle is connected to the lead screw to drive it to rotate. The lead screw nut is fixed to the middle of the movable crossbeam and sleeved on the lead screw.

10. A seat, characterized in that, Includes the adjustable lumbar support assembly as described in any one of claims 1-9.

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