Adjusting mechanism for waist support of seat and seat

Abstract

The utility model discloses an adjusting mechanism of a seat waist support and a seat, the adjusting mechanism of the seat waist support comprises a fixed seat, a movable seat, an air pressure rod and an operation assembly; a first guide part is arranged on the fixed seat, and a second guide part is arranged on the movable seat; a first connecting rod and a second connecting rod are arranged between the fixed seat and the movable seat; one end of the first connecting rod forms a first rotating part pivoted on the fixed seat, and the other end of the first connecting rod forms a first sliding part which is mounted on the second guide part and can slide along the second guide part; a second rotating part pivoted on the movable seat is formed at one end of the second connecting rod, and a second sliding part which is mounted on the first guide part and can slide along the first guide part is formed at the other end of the second connecting rod; one end of the pneumatic rod is hinged to the fixed seat, the other end of the pneumatic rod is hinged to the movable seat, and a control button is arranged on the pneumatic rod; the operation assembly comprises a triggering piece and a driving unit. According to the utility model, stepless adjustment of the seat waist support can be realized, so that the adjustment of the seat waist support is more convenient and quicker.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to an adjustment mechanism for lumbar support of a seat and a seat. Background Art

[0002] Traditional chairs have a backrest at the back of the seat cushion to support the user's back, but the user's waist is in a suspended state and cannot be supported, which leads to waist fatigue. In order to improve the defects of traditional chairs, some existing high-end chairs such as office chairs and e-sports chairs are equipped with lumbar supports or other lumbar support parts on the backrest. When the user's back leans back on the chair backrest, the lumbar support part can support the user's waist to avoid the waist being suspended in the air, thereby relieving waist fatigue when the user uses the chair for a long time.

[0003] In order to adapt to users of different body shapes and different sitting posture requirements, the lumbar support members in some existing seats are usually configured to be able to move forward and backward. For example, the lumbar support members of some seats are connected to a sliding member that can slide along a linear guide rail. A spring steel ball is arranged on the sliding member, and a plurality of slots arranged along the extension direction of the linear guide rail are correspondingly arranged on the linear guide rail. The spring steel ball and the slots cooperate to form a locking mechanism. The locking mechanism is used to limit the freedom of sliding of the sliding member on the linear guide rail. When the lumbar support member is adjusted to the appropriate position in the front and rear directions, the spring steel ball is embedded in the slot at the appropriate position. During the adjustment process, due to a certain distance between adjacent slots, the locking mechanism can only lock the lumbar support member at a few specific fixed positions, and the lumbar support member cannot be fixed when it is adjusted to any position, that is, the front and rear position of the lumbar support member cannot be infinitely adjusted. In addition, since the extension direction of the linear guide rail is consistent with the direction of forward and backward movement of the lumbar support, it is difficult to set a large number of slots in a limited space, resulting in fewer adjustable gears for the lumbar support, making it difficult to meet the user's more personalized needs. Utility Model Content

[0004] The purpose of the utility model is to provide an adjustment mechanism for a seat lumbar support and a seat, which can realize stepless adjustment of the seat lumbar support.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The seat lumbar support adjustment mechanism includes a fixed seat fixed to the seat back, a movable seat arranged in front of the fixed seat, a pneumatic rod, and an operating assembly; the seat lumbar support is connected to the movable seat;

[0007] The fixed seat is provided with a first guide portion extending in the up-down direction, and the movable seat is provided with a second guide portion extending in the up-down direction;

[0008] A first connecting rod and a second connecting rod are provided between the fixed seat and the movable seat, and the middle portions of the first connecting rod and the second connecting rod are hinged together so that the two form an X-shaped bracket; one end of the first connecting rod forms a first rotating portion pivotally connected to the fixed seat, and the other end forms a first sliding portion mounted on the second guide portion and capable of sliding along the second guide portion; one end of the second connecting rod forms a second rotating portion pivotally connected to the movable seat, and the other end forms a second sliding portion mounted on the first guide portion and capable of sliding along the first guide portion;

[0009] One end of the gas rod is hinged to the fixed seat, and the other end is hinged to the movable seat, so that the gas rod provides elastic support between the fixed seat and the movable seat. The gas rod is provided with a control button, which is used to enable the two ends of the gas rod to move relative to each other when pressed, and to enable the two ends of the gas rod to be relatively fixed when released;

[0010] The operating assembly includes a trigger member and a driving unit, and the driving unit is used to drive the trigger member to move between a first position pressing the control button and a second position disengaging from the control button.

[0011] Preferably, the pneumatic rod includes a cylinder body and a retractable piston rod mounted on the cylinder body, the end of the cylinder body away from the piston rod is hinged on the movable seat, a connecting seat is fixedly connected to the fixed seat, the end of the piston rod is hinged on the connecting seat, and the control button is arranged at the end of the piston rod.

[0012] Preferably, a lever is provided on the connecting seat, the middle part of the lever is pivotally connected to the connecting seat, one end of the lever forms a trigger member and the other end forms a connecting end, and the driving unit drives the connecting end to move so that the trigger member swings between the first position and the second position.

[0013] Preferably, the driving unit includes a pull rope, an elastic reset member, and a wrench. One end of the pull rope is connected to the connecting end of the lever, and the wrench is connected to the other end of the pull rope. The wrench is used to pull the pull rope when it is pulled so that the pull rope drives the trigger member to swing from the second position to the first position; the elastic reset member is used to provide an elastic reset force so that the pull rope drives the trigger member to swing from the first position to the second position.

[0014] Preferably, the connecting seat is provided with a connecting arm located below the connecting end, and a guide sleeve is fixedly connected to the connecting arm. One end of the pull rope passes upward through the guide sleeve and is connected to the connecting end of the shift rod.

[0015] Preferably, an elastic element is provided between the lever and the connecting seat, and the elastic element is used to provide an elastic stress so that the trigger member at one end of the lever always maintains a tendency to swing toward the second position.

[0016] Preferably, the lower end of the fixed seat is fixedly connected to the first fixed block, the first rotating part is a first shaft head pivotally connected to the first fixed block, and the first sliding part is the first movable block connected to the upper end of the first connecting rod; the lower end of the movable seat is fixedly connected to the second fixed block, the second rotating part is the second shaft head pivotally connected to the second fixed block, and the second sliding part is the second movable block connected to the upper end of the second connecting rod; the first guide part is a first slide groove extending in the up and down directions provided on the fixed seat, and the second guide part is a second slide groove extending in the up and down directions provided on the movable seat, the first movable block slidably cooperates with the second slide groove, and the second movable block slidably cooperates with the first slide groove.

[0017] Preferably, the first movable block is pivotally connected to a first roller embedded in the second sliding groove and capable of rolling along the second sliding groove; the second movable block is pivotally connected to a second roller embedded in the first sliding groove and capable of rolling along the first sliding groove.

[0018] Preferably, two first connecting rods and two second connecting rods are provided between the fixed seat and the movable seat, the two first connecting rods are arranged at a certain distance in the left and right directions and connected together, and the two second connecting rods are respectively located on the outside of the two first connecting rods and connected together; the second connecting rod and the middle part of the first connecting rod located on the inner side thereof are pivotally connected together by a rotating shaft passing through the two, and a torsion spring is sleeved on the rotating shaft, one end of the torsion spring abuts against the first connecting rod and the other end abuts against the movable seat to provide an elastic stress that causes the first connecting rod to swing backward relative to the movable seat.

[0019] A seat comprising the above-mentioned adjustment mechanism for the seat lumbar support.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In the present invention, a pneumatic rod is provided between the movable seat and the fixed seat to control the trigger member, so that the trigger member presses the control button on the pneumatic rod, the pneumatic rod is in an elastic support state, the trigger member is disengaged from the control button, and the pneumatic rod is in a rigid support state. Therefore, when adjusting, the user only needs to operate the driving member so that the driving member drives the trigger member to press the control button, and the movable seat can move back and forth. The free extension and retraction of the pneumatic rod can adapt to the movable seat staying at any position, and after the position of the movable seat is adjusted into place, the pneumatic rod is in a rigid support state and is placed between the movable seat and the fixed seat. Thus, stepless adjustment of the seat lumbar support can be achieved. During the adjustment process, the user maintains the corresponding sitting posture and does not need to get off the seat, making the adjustment of the seat lumbar support more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 This is a schematic diagram of the assembly of the utility model;

[0024] Figure 3 This is a schematic diagram of a usage state of the utility model;

[0025] Figure 4 This is a schematic diagram of another usage state of the utility model;

[0026] Figure 5 This is a schematic diagram of a working state of the operating component of the utility model;

[0027] Figure 6 This is a schematic diagram of another working state of the operating component of the utility model.

[0028] Among them: 10, backrest; 20, lumbar support back plate; 30, fixed seat; 31, rigid seat; 310, side panel; 311, first slide groove; 312, guide groove; 32, outer frame; 33, connecting seat; 331, connecting arm; 332, guide sleeve; 34, lever; 341, trigger member; 342, connecting end; 40, movable seat; 41, rigid seat; 410, side panel; 411, second slide groove; 412, guide groove; 42, outer frame; 51, first connecting rod; 511, first shaft head; 512, first fixed block; 513, first movable block; 514, first roller; 52, second connecting rod; 522, second fixed block; 523, second movable block; 524, second roller; 53, torsion spring; 60, pneumatic rod; 61, cylinder body; 62, piston rod; 63, control button; 70, pull rope. DETAILED DESCRIPTION

[0029] Below, the present invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and cannot be understood as limiting this application.

[0030] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, a connection through an intermediary medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] like Figure 1 、 2, 3, 4, 5, and 6 show an adjustment mechanism for a seat lumbar support of the present invention, comprising a fixed seat 30, a movable seat 40, a pneumatic rod 60, and an operating assembly, wherein the fixed seat 30 is fixedly connected to the seat back 10, the movable seat 40 is located in front of the fixed seat 30, and the lumbar support of the seat is connected to the movable seat 40. Specifically, the lumbar support backboard 20 for supporting the human waist is connected to the movable seat 40 as a lumbar support. The first guide portion is provided on the fixed seat 30 and extends upward and downward, and the first guide portion is specifically a first slide groove 311 provided on the fixed seat 30 and extends in the upward and downward directions. The second guide portion is specifically a second slide groove 411 provided on the movable seat 40 and extends in the upward and downward directions. A first connecting rod 51 and a second connecting rod 52 are provided between the fixed seat 30 and the movable seat 40, and the middle parts of the first connecting rod 51 and the second connecting rod 52 are hinged together. Thus, an X-shaped bracket is formed between the fixed seat 30 and the movable seat 40 by utilizing the first connecting rod 51 and the second connecting rod 52 to connect the movable seat 40 and the fixed seat 30, so that the movable seat 40 can have the freedom of movement relative to the fixed seat 30 in the front and rear directions. Specifically, the lower end of the first connecting rod 51 forms a first rotating portion pivotally connected to the fixed seat 30, and the upper end forms a first sliding portion. The first sliding portion is installed in the second slide groove 411 and can slide along the extension direction of the second slide groove 411; the lower end of the second connecting rod 52 The upper end forms a second rotating portion pivotally connected to the movable seat 40, and the upper end forms a second sliding portion, which is installed in the first slide groove 311 and can slide along the extension direction of the first slide groove 311; one end of the gas pressure rod 60 is hinged on the fixed seat 30, and the other end is hinged on the movable seat 40, and the gas pressure rod 60 provides elastic stress between the fixed seat 30 and the movable seat 40, that is, the elongation and shortening of the gas pressure rod 60 can adapt to the freedom of the movable seat 40 to move forward and backward relative to the fixed seat 30, and the gas pressure rod 60 is on the gas pressure rod 60. A control button 63 is provided, which is used to control the closing and opening of the pneumatic rod 60. When the control button 63 is pressed, the two ends of the pneumatic rod 60 can move relative to each other, that is, the pneumatic rod 60 can extend and shorten. At this time, the movable seat 40 has the freedom to move in the front and rear directions relative to the fixed seat 30; when the control button 63 is released, the two ends of the pneumatic rod 60 can be relatively fixed. At this time, the pneumatic rod 60 forms a rigid support member, supported between the movable seat 40 and the fixed seat 30.The operating component includes a trigger member 341 and a driving unit. The driving unit is used to drive the trigger member 341 to drive the trigger member 341 to move between a first position that presses against the control button 63 and a second position that is disengaged from the control button 63. When the driving unit drives the trigger member 341 to move to the first position, the trigger member 341 presses the control button 63, so that the pneumatic rod 60 forms an elastic support member between the movable seat 40 and the fixed seat 30. When the driving unit drives the trigger member 341 to move to the second position, the trigger member 341 is disengaged from the control button 63, and the control button 63 is released, so that the pneumatic rod 60 forms a rigid support member between the movable seat 40 and the fixed seat 30.

[0033] Figure 3 、 4 It shows the state that the movable seat 40 of the utility model is in different positions relative to the fixed seat 30. Figure 3 When the user needs to adjust the position of the lumbar support back plate 20, the user directly controls the driving unit so that the driving unit drives the trigger member 341 to move to the first position, thereby making the gas pressure rod 60 in an elastic supporting state. At this time, if the user needs to adjust the lumbar support back plate 20 backward, the user's waist leans back, increasing the backward pushing pressure on the lumbar support back plate 20, and the gas pressure rod 60 in the elastic supporting state contracts. The movable seat 40 drives the lumbar support back plate 20 to move backward until the lumbar support back plate 20 is adjusted to the required position. The user controls the driving unit so that the trigger member 341 moves to the second position. At this time, the gas pressure rod 60 is in a rigid supporting state, and the freedom of the movable seat 40 to move forward and backward relative to the fixed seat 30 is locked. The gas pressure rod 60 provides rigid support between the fixed seat 30 and the movable seat 40, ensuring that the lumbar support back plate 20 can provide stable lumbar support for the user. Figure 3 In the above state, when it is necessary to adjust the lumbar support back plate 20 forward, the user drives the trigger member 341 by operating the driving unit, so that the trigger member 341 moves to the first position. When the pneumatic rod 60 is in the elastically supported state, the elastic stress of the pneumatic rod 60 itself pushes the movable seat 40 forward. When the movable seat 40 drives the lumbar support back plate 20 to move to the desired position, the user operates the driving unit to move the trigger member 341 to the second position, thereby putting the pneumatic rod 60 in a rigidly supported state.

[0034] In the present invention, since a pneumatic rod 60 is set between the movable seat 40 and the fixed seat 30 to control the trigger member 341, the trigger member 341 presses the control button 63 on the pneumatic rod 60, the pneumatic rod 60 is in an elastic support state, the trigger member 341 is disengaged from the control button 63, and the pneumatic rod 60 is in a rigid support state. Therefore, when adjusting, the user only needs to operate the driving member so that the driving member drives the trigger member 341 to press the control button 63, and the movable seat 40 can move back and forth. The free extension and retraction of the pneumatic rod 60 can adapt to the movable seat 40 staying at any position, and after the position of the movable seat 40 is adjusted into place, the pneumatic rod 60 is in a rigid support state and is placed between the movable seat 40 and the fixed seat 30, thereby realizing stepless adjustment of the seat lumbar support. During the adjustment process, the user maintains the corresponding sitting posture and does not need to get off the seat, making the adjustment of the seat lumbar support more convenient and quick.

[0035] In a preferred embodiment, the pneumatic rod 60 includes a cylinder body 61 and a piston rod 62. The piston rod 62 is retractably mounted on the cylinder body 61. One end of the cylinder body 61 away from the piston rod 62 is hinged to the top of the movable seat 40. A connecting seat 33 is fixedly connected to the bottom of the fixed seat 30. The end of the piston rod 62 is hinged to the connecting seat 33. The control button 63 is set at the end of the piston rod 62. In this way, the pneumatic rod 60 is tilted and arranged between the movable seat 40 and the fixed seat 30. Figure 4In the illustrated state, when the lumbar support back panel 20 is in its rearmost position, the tilted gas rod 60 occupies less space in the fore-aft direction, allowing the movable seat 40 to rest closely against the fixed seat 30. This reduces the space occupied by the adjustment mechanism in the fore-aft direction, making the overall structure of the seat back 10 and the lumbar support more compact. Furthermore, a larger gas rod 60 can be used. When the gas rod 60 is in a rigid support state, it can provide sufficient and stable support for the lumbar support back panel 20. A lever 34 is provided on the connecting seat 33. The middle portion of the lever 34 is pivotally connected to the connecting seat 33, forming a lever mechanism on the connecting seat 33. One end of the lever 34, located below the control button 63, forms a trigger member 341, and the other end forms a connecting end 342. The drive unit drives the connecting end 342 to move, causing the trigger member 341 to swing between the first position and the second position. Of course, in other embodiments, the lever 34 can also be slidably installed on the connecting base 33, and the driving unit can drive the lever 34 to slide relative to the connecting base 33 to enable the trigger member 341 on the lever 34 to slide between the first position and the second position. In short, as long as the driving unit can drive the lever 34 to move, the moved lever 34 can drive the trigger member 341 thereon to switch between two different positions, thereby realizing the pressing and releasing of the control button 63. The above-mentioned driving unit includes a pull rope 70, an elastic reset member and a wrench. One end of the pull rope 70 is connected to the connecting end 342 of the lever 34, and the wrench is connected to the other end of the pull rope 70. The wrench can be installed on one side of the seat cushion and is configured to be able to rotate or translate. When the user pulls the wrench to rotate or translate the wrench, the wrench can pull the pull rope 70, so that the pull rope 70 pulls the connecting end 342 of the lever 34, and then the lever 34 swings, and finally drives the trigger member 341 to swing from the second position to the first position, that is, the trigger member 341 swings from the state of being disengaged from the control button 63 to the state of pressing the control button 63. The elastic reset member is used to provide an elastic reset force, which can directly act on the wrench, so that the pull rope 70 is reset while the wrench is reset, driving the lever 34 to swing, and then driving the trigger member 341 to swing from the first position to the second position. Of course, the elastic restoring force of the elastic restoring member can also act directly on the drawstring 70. When the user operates the wrench to pull the drawstring 70, the elastic restoring member is compressed. When the external force on the wrench is released, the elastic restoring force exerted by the elastic restoring member on the drawstring 70 causes the drawstring 70 to return to its original position. The connecting base 33 is provided with a connecting arm 331 located below the connecting end 342. A guide sleeve 332 is fixed to the connecting arm 331. One end of the drawstring 70 passes upward through the guide sleeve 332 and is connected to the connecting end 342 of the lever 34.

[0036] In other embodiments, an elastic element is further disposed between the lever 34 and the connecting base 33. The elastic element is configured to provide an elastic stress so that the trigger member 341 on the lever 34 always maintains a tendency to swing toward the second position. That is, when the drive unit is not operated, the trigger member 341 on the lever 34 always remains disengaged from the control button 63. For example, the middle portion of the lever 34 is pivotally connected to the connecting base 33 via a pin, and the elastic element is a torsion spring disposed on the pin.

[0037] In the present invention, the first connecting rod 51 and the second connecting rod 52 located between the fixed seat 30 and the movable seat 40 form an X-shaped bracket, which enables the movable seat 40 to move in the front-to-back direction relative to the fixed seat 30, and provides a certain support to the movable seat 40 through the X-shaped bracket. Specifically, a first fixed block 512 is fixedly connected to the lower end of the fixed seat 30, the first rotating part is a first shaft head 511 connected to the lower end of the first connecting rod 51 and pivotally connected to the first fixed block 512, and the first sliding part is a first movable block 513 connected to the upper end of the first connecting rod 51; the lower end of the movable seat 40 is fixedly connected to the second fixed block 522, the second rotating part is a second shaft head connected to the lower end of the second connecting rod 52 and pivotally connected to the second fixed block 522, and the second sliding part is a second shaft head connected to the upper end of the second connecting rod 52. Two movable blocks 523; the first movable block 513 slides in cooperation with the second slide groove 411, and the second movable block 523 slides in cooperation with the first slide groove 311; when the movable seat 40 moves forward relative to the fixed seat 30, the first movable block 513 moves downward along the second slide groove 411, and the second movable block 523 moves downward along the first slide groove 311; conversely, when the movable seat 40 moves backward relative to the fixed seat 30, the first movable block 513 moves upward along the second slide groove 411, and the second movable block 523 moves upward along the first slide groove 311. In addition, a first roller 514 is installed on the first movable block 513, and the first roller 514 is embedded in the second slide groove 411, so that the first movable block 513 is set to roll inside the second slide groove 411, reducing the friction between the first movable block 513 and the movable seat 40 when it moves up and down, so that the first movable block 513 moves more smoothly. Similarly, a second roller 524 is installed on the second movable block 523, and the second roller 524 rolls inside the first slide groove 311, reducing the friction between the second movable block 523 and the fixed seat 30 when it moves up and down, so that the second movable block 523 moves more smoothly, and then the lumbar support back plate 20 can be adjusted comfortably forward and backward.

[0038] The fixed seat 30 and the movable seat 40 are both formed by bending metal plates. Taking the fixed seat 30 as an example, a side plate 310 is formed on both sides thereof by bending, and a first slide groove 311 is provided on each of the two side plates 310; similarly, the two sides of the movable seat 40 are bent to form a side plate 410, and a second slide groove 411 is provided on each of the two side plates 410; two first connecting rods 51 and two second connecting rods 52 are provided between the fixed seat 30 and the movable seat 40, and the two first connecting rods 51 are provided at a certain distance in the left and right directions and are connected together, and the two second connecting rods 52 are respectively located on the outside of the two first connecting rods 51, and the two second connecting rods 52 are connected together, and the two groups of first connecting rods 51 and second connecting rods 52 respectively form two synchronous The X-shaped bracket, the second link 52 and the first link 51 located on the inner side thereof are pivotally connected together by a rotating shaft passing through the two, and a torsion spring 53 is sleeved on the rotating shaft. One end of the torsion spring 53 abuts on the first link 51 and the other end abuts on the movable seat 40, which is used to provide an elastic stress for causing the first link 51 to swing backward relative to the movable seat 40. In this way, the elastic stress of the torsion spring 53 always makes the movable seat 40 tend to move forward, that is, the torsion spring 53 assists the movable seat 40 to always maintain a forward movement trend, thereby avoiding jamming between the first link 51 and the second link 52, between the pneumatic rod 60 and the movable seat 40, and between the pneumatic rod 60 and the fixed seat 30, making the adjustment mechanism more flexible.

[0039] In addition, a bent portion is provided on the side plate 310 of the fixed seat 30 to form a guide groove 312 on the side of the fixed seat 30. The second movable block 523 is embedded in the guide groove 312, and the guide groove 312 serves as a guide for the second movable block 523. Similarly, a bent portion is provided on the side plate 410 of the movable seat 40 to form a guide groove 412 on the side of the movable seat 40. The guide groove 412 serves as a guide for the first movable block 513. The fixed seat 30 includes a rigid seat 31 formed by bending a metal sheet and an outer frame 32. The outer frame 32 wraps around the outside of the rigid seat 31, covers the first slide groove 311, and prevents dust from affecting the second roller 524. Similarly, the movable seat 40 includes a rigid seat 41 and an outer frame 42 formed by bending a metal sheet. The outer frame 42 wraps around the outside of the rigid seat 41, covers the second slide groove 411, and prevents dust from affecting the first roller 514.

[0040] The seat of the present invention includes the above-mentioned adjustment mechanism for the seat lumbar support. Other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0041] Finally, it should be noted that the above-mentioned implementation mode is only an optional embodiment of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. The seat lumbar support adjustment mechanism is characterized by: It includes a fixed seat fixed on the seat back, a movable seat arranged in front of the fixed seat, a pneumatic rod, and an operating assembly; the lumbar support of the seat is connected to the movable seat; The fixed seat is provided with a first guide portion extending in the up-down direction, and the movable seat is provided with a second guide portion extending in the up-down direction; A first connecting rod and a second connecting rod are provided between the fixed seat and the movable seat, and the middle portions of the first connecting rod and the second connecting rod are hinged together so that the two form an X-shaped bracket; one end of the first connecting rod forms a first rotating portion pivotally connected to the fixed seat, and the other end forms a first sliding portion mounted on the second guide portion and capable of sliding along the second guide portion; one end of the second connecting rod forms a second rotating portion pivotally connected to the movable seat, and the other end forms a second sliding portion mounted on the first guide portion and capable of sliding along the first guide portion; One end of the gas rod is hinged to the fixed seat, and the other end is hinged to the movable seat, so that the gas rod provides elastic support between the fixed seat and the movable seat. The gas rod is provided with a control button, which is used to enable the two ends of the gas rod to move relative to each other when pressed, and to enable the two ends of the gas rod to be relatively fixed when released; The operating assembly includes a trigger member and a driving unit, and the driving unit is used to drive the trigger member to move between a first position pressing the control button and a second position disengaging from the control button.

2. The seat lumbar support adjustment mechanism according to claim 1, characterized in that: The pneumatic rod includes a cylinder body and a retractable piston rod mounted on the cylinder body. The end of the cylinder body away from the piston rod is hinged on the movable seat. A connecting seat is fixedly connected to the fixed seat. The end of the piston rod is hinged on the connecting seat. The control button is set at the end of the piston rod.

3. The seat lumbar support adjustment mechanism according to claim 2, characterized in that: A lever is provided on the connecting seat, the middle part of which is pivotally connected to the connecting seat, one end of the lever forms a trigger member and the other end forms a connecting end, and the driving unit drives the connecting end to move so that the trigger member swings between the first position and the second position.

4. The seat lumbar support adjustment mechanism according to claim 3, characterized in that: The driving unit includes a pull rope, an elastic reset member, and a wrench. One end of the pull rope is connected to the connecting end of the lever, and the wrench is connected to the other end of the pull rope. The wrench is used to pull the pull rope when it is pulled so that the pull rope drives the trigger member to swing from the second position to the first position; the elastic reset member is used to provide an elastic reset force so that the pull rope drives the trigger member to swing from the first position to the second position.

5. The seat lumbar support adjustment mechanism according to claim 4, characterized in that: The connecting seat is provided with a connecting arm located below the connecting end, and a guide sleeve is fixedly connected to the connecting arm. One end of the pull rope passes through the guide sleeve upwards and is connected to the connecting end of the shift rod.

6. The seat lumbar support adjustment mechanism according to claim 3, characterized in that: An elastic element is provided between the shifting rod and the connecting seat, and the elastic element is used to provide an elastic stress so that the triggering member at one end of the shifting rod always maintains a tendency to swing toward the second position.

7. The seat lumbar support adjustment mechanism according to claim 1, wherein: The lower end of the fixed seat is fixedly connected to the first fixed block, the first rotating part is the first shaft head pivotally connected to the first fixed block, and the first sliding part is the first movable block connected to the upper end of the first connecting rod; the lower end of the movable seat is fixedly connected to the second fixed block, the second rotating part is the second shaft head pivotally connected to the second fixed block, and the second sliding part is the second movable block connected to the upper end of the second connecting rod; the first guide part is a first slide groove extending in the up and down directions provided on the fixed seat, and the second guide part is a second slide groove extending in the up and down directions provided on the movable seat, the first movable block slidably cooperates with the second slide groove, and the second movable block slidably cooperates with the first slide groove.

8. The seat lumbar support adjustment mechanism according to claim 7, wherein: The first movable block is pivotally connected to a first roller embedded in the second sliding groove and capable of rolling along the second sliding groove; the second movable block is pivotally connected to a second roller embedded in the first sliding groove and capable of rolling along the first sliding groove.

9. The seat lumbar support adjustment mechanism according to claim 6, wherein: Two first connecting rods and two second connecting rods are arranged between the fixed seat and the movable seat. The two first connecting rods are arranged at a certain distance in the left and right directions and are connected together. The two second connecting rods are respectively located on the outside of the two first connecting rods and are connected together; the second connecting rod and the middle part of the first connecting rod located on the inner side thereof are pivotally connected together by a rotating shaft passing through the two. A torsion spring is sleeved on the rotating shaft. One end of the torsion spring abuts against the first connecting rod and the other end abuts against the movable seat to provide an elastic stress that causes the first connecting rod to swing backward relative to the movable seat.

10. A seat, characterized in that The invention comprises the adjustment mechanism for the seat lumbar support according to any one of claims 1 to 9.

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