Adjusting mechanism for waist support of seat and seat

Abstract

The invention discloses an adjusting mechanism for a seat waist support and a seat, the adjusting mechanism for 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. The 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 invention relates to the technical field of seats, and 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 rear of the seat cushion to support the user's back, but the user's waist is suspended in the air 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 waist 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 the sliding member to slide on the linear guide rail. When the lumbar support member is adjusted to an appropriate position along 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 is consistent with the direction of the lumbar support moving forward and backward, 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. Summary of the invention

[0004] The object of the present invention 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] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The adjustment mechanism of the seat lumbar support comprises a fixed seat fixed on the seat back, a movable seat arranged in front of the fixed seat, a gas pressure 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 arranged between the fixed seat and the movable seat, and the middle parts 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 part pivotally connected to the fixed seat, and the other end forms a first sliding part installed on the second guide part and capable of sliding along the second guide part; one end of the second connecting rod forms a second rotating part pivotally connected to the movable seat, and the other end forms a second sliding part installed on the first guide part and capable of sliding along the first guide part;

[0009] One end of the gas pressure rod is hinged on the fixed seat, and the other end is hinged on the movable seat, so that the gas pressure rod provides elastic support between the fixed seat and the movable seat. The gas pressure rod is provided with a control button, which is used to make the two ends of the gas pressure rod relatively movable when pressed, and to make the two ends of the gas pressure rod 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 piston rod telescopically 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 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.

[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 lever.

[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 a 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 a first movable block connected to the upper end of the first connecting rod; the lower end of the movable seat is fixedly connected to a second fixed block, the second rotating part is a second shaft head pivotally connected to the second fixed block, and the second sliding part is a 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-down direction on the fixed seat, the second guide part is a second slide groove extending in the up-down direction 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, a first roller embedded in the second slide groove and capable of rolling along the second slide groove is pivotally connected to the first movable block; and a second roller embedded in the first slide groove and capable of rolling along the first slide groove is pivotally connected to the second movable block.

[0018] Preferably, 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-right direction 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 comprises the above-mentioned adjustment mechanism for the seat lumbar support.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, a pneumatic rod is arranged 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 separated from the control button, and the pneumatic rod is in a rigid support state. Therefore, during adjustment, 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 forward and backward. 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. Therefore, stepless adjustment of the lumbar support of the seat can be achieved. During the adjustment process, the user maintains a corresponding sitting posture without getting off the seat, making the adjustment of the lumbar support of the seat more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the assembly of the present invention;

[0024] Figure 3 A schematic diagram of a use state of the present invention;

[0025] Figure 4 It is another schematic diagram of the use state of the present invention;

[0026] Figure 5 A schematic diagram of a working state of the operating component of the present invention;

[0027] Figure 6 It is another working state schematic diagram of the operating component of the present invention.

[0028] Among them: 10, backrest; 20, lumbar support back plate; 30, fixed seat; 31, rigid seat; 310, side plate; 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 plate; 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, in conjunction with the accompanying drawings and specific embodiments, the present invention is further described. 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. Except for special instructions, 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 reference numerals 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 the present application, and cannot be understood as limiting the present application.

[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] like Figure 1 , 2, 3, 4, 5, and 6 are 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 at the front side of the fixed seat 30, and the lumbar support of the seat is connected to the movable seat 40. Specifically, a lumbar support backboard 20 for supporting the human waist is connected to the movable seat 40 as a lumbar support. A first guide portion extending up and down is provided on the fixed seat 30, and the first guide portion is specifically a first slide groove 311 extending in the up and down direction on the fixed seat 30; a second guide portion extending up and down is provided on the movable seat 40, and the second guide portion is specifically a second slide groove 411 extending in the up and down direction on the movable seat 40; 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, thereby forming an X-shaped bracket between the fixed seat 30 and the movable seat 40 by using the first connecting rod 51 and the second connecting rod 52, and the movable seat 40 and the fixed seat 30 are connected by the X-shaped bracket, so that the movable seat 40 can have the freedom to move 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 of the pneumatic rod 60 forms a second rotating part pivotally connected to the movable seat 40, and the upper end forms a second sliding part, the second sliding part 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 pneumatic rod 60 is hinged on the fixed seat 30, and the other end is hinged on the movable seat 40. The pneumatic rod 60 provides elastic stress between the fixed seat 30 and the movable seat 40, that is, the elongation and shortening of the pneumatic rod 60 can adapt to the freedom of the movable seat 40 to move forward and backward relative to the fixed seat 30. 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 relatively, 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 of pressing against the control button 63 and a second position of disengaging 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 disengages from the control button 63, releases the control button 63, and forms a rigid support member between the movable seat 40 and the fixed seat 30.

[0033] Figure 3 , 4 The movable seat 40 of the present invention is shown in different positions relative to the fixed seat 30. Figure 3 In the state shown, the movable seat 40 is in a forward position, that is, the lumbar support back plate 20 on the movable seat 40 is in a state of supporting the user's waist in the front. When it is necessary to adjust the position of the lumbar support back plate 20, the user directly controls the drive unit so that the drive unit drives the trigger member 341 to move to the first position, and then the gas pressure rod 60 is in an elastic support state. At this time, if it is necessary to adjust the lumbar support back plate 20 backward, the user's waist leans backward, increasing the backward pushing pressure on the lumbar support back plate 20, and the gas pressure rod 60 in the elastic support state contracts, and the movable seat 40 drives the lumbar support back plate 20 to move backward. After the lumbar support back plate 20 is adjusted to the required position, the user controls the drive unit to move the trigger member 341 to the second position. At this time, the gas pressure rod 60 is in a rigid support state, and the freedom of the movable seat 40 to move forward and backward relative to the fixed seat 30 is locked, and 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 described 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 to move the trigger member 341 to the first position. When the pneumatic rod 60 is in an 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 arranged between the movable seat 40 and the fixed seat 30 to control the trigger member 341, so that 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 separated from the control button 63, and the pneumatic rod 60 is in a rigid support state. Therefore, during adjustment, 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 forward and backward. 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 a corresponding sitting posture without getting 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, wherein the piston rod 62 is telescopically mounted on the cylinder body 61, wherein one end of the cylinder body 61 away from the piston rod 62 is hinged to the top of the movable seat 40, and a connecting seat 33 is fixedly connected to the bottom of the fixed seat 30, and the end of the piston rod 62 is hinged to the connecting seat 33, and the control button 63 is arranged at the end of the piston rod 62. In this way, the pneumatic rod 60 is tiltedly arranged between the movable seat 40 and the fixed seat 30. Figure 4In the state shown, when the lumbar support back plate 20 is in the most rearward position, the inclined gas pressure rod 60 occupies a smaller space in the front-to-back direction, so that the movable seat 40 can be close to the fixed seat 30, thereby reducing the space occupied by the adjustment mechanism in the front-to-back direction, making the seat back 10 and the overall structure of the lumbar support more compact. At the same time, a larger gas pressure rod 60 can also be used. When the gas pressure rod 60 is in a rigid support state, it can provide sufficient and stable support force for the lumbar support back plate 20. A lever 34 is provided on the connecting seat 33, and the middle part of the lever 34 is pivotally connected to the connecting seat 33, so that the lever 34 forms a lever mechanism on the connecting seat 33. One end of the lever 34 is located below the control button 63 to form a trigger member 341, and the other end forms a connecting end 342. The driving unit drives the connecting end 342 to move, so that the trigger member 341 swings between the first position and the second position. Of course, in other embodiments, the lever 34 can also be slidably installed on the connecting seat 33, and the driving unit can drive the lever 34 to slide relative to the connecting seat 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 lever 34 after movement 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 of the seat and is configured to be rotatable or translatable. 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 directly act 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 applied by the elastic restoring member to the drawstring 70 resets the drawstring 70. The connecting seat 33 is provided with a connecting arm 331 located below the connecting end 342. A guide sleeve 332 is fixed on the connecting arm 331. One end of the drawstring 70 passes through the guide sleeve 332 upwards 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 connection seat 33, and the elastic element is used 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 maintains a state of being separated from the control button 63. For example, the middle portion of the lever 34 is pivotally connected to the connection seat 33 through a pin shaft, and the elastic element is a torsion spring disposed on the pin shaft.

[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, so that the movable seat 40 can move relative to the fixed seat 30 in the front-rear direction, and the X-shaped bracket provides a certain support for the movable seat 40. 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 pivoted on 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; a second fixed block 522 is fixedly connected to the lower end of the movable seat 40, the second rotating part is a second shaft head connected to the lower end of the second connecting rod 52 and pivoted on the second fixed block 522, and the second sliding part is a first movable block 513 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. 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 can move 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 can move more smoothly, and then the lumbar support back plate 20 can be adjusted comfortably front and back.

[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 by bending on both sides thereof, and a first slide groove 311 is respectively arranged on the two side plates 310; similarly, the two sides of the movable seat 40 are respectively bent to form a side plate 410, and a second slide groove 411 is respectively arranged on the two side plates 410; two first connecting rods 51 and two second connecting rods 52 are arranged between the fixed seat 30 and the movable seat 40, and the two first connecting rods 51 are arranged at a certain distance in the left and right directions and connected together, and the two second connecting rods 52 are respectively located on the outsides 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 An X-shaped bracket, the second connecting rod 52 and the first connecting rod 51 located on the inner side thereof are pivotally connected together by a rotating shaft that passes 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 connecting rod 51 and the other end abuts on the movable seat 40, which is used to provide an elastic stress that causes the first connecting rod 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 have a tendency to move forward, that is, the torsion spring 53 assists the movable seat 40 to always maintain a forward movement tendency, thereby avoiding jamming between the first connecting rod 51 and the second connecting rod 52, between the pneumatic rod 60 and the movable seat 40, and between the pneumatic rod 60 and the fixed seat 30, so that the adjustment mechanism is more flexible.

[0039] In addition, a bending 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, and the second movable block 523 is embedded in the guide groove 312, and the guide groove 312 guides the second movable block 523; similarly, a bending 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, and the guide groove 412 guides the first movable block 513. The fixed seat 30 includes a rigid seat 31 and an outer frame 32 formed by bending a metal sheet, the outer frame 32 is wrapped around the outside of the rigid seat 31, and covers the first slide groove 311 to prevent 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 is wrapped around the outside of the rigid seat 41, and covers the second slide groove 411 to prevent 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, and 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 modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention are 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 gas pressure 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 arranged between the fixed seat and the movable seat, and the middle parts 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 part pivotally connected to the fixed seat, and the other end forms a first sliding part installed on the second guide part and capable of sliding along the second guide part; one end of the second connecting rod forms a second rotating part pivotally connected to the movable seat, and the other end forms a second sliding part installed on the first guide part and capable of sliding along the first guide part; One end of the gas pressure rod is hinged on the fixed seat, and the other end is hinged on the movable seat, so that the gas pressure rod provides elastic support between the fixed seat and the movable seat. The gas pressure rod is provided with a control button, which is used to make the two ends of the gas pressure rod relatively movable when pressed, and to make the two ends of the gas pressure rod relatively fixed when released; The operating assembly comprises a trigger member and a driving unit, wherein the driving unit is used for driving the trigger member to move between a first position pressing against a 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 installed 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 arranged on the connection seat, the middle part of which is pivotally connected to the connection seat, one end of the lever forms a trigger member and the other end forms a connection end, and the driving unit drives the connection 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 shifting rod.

6. The seat lumbar support adjustment mechanism according to claim 3, characterized in that: An elastic element is arranged 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.

7. The seat lumbar support adjustment mechanism according to claim 1, characterized in that: The lower end of the fixed seat is fixedly connected to a 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 a first movable block connected to the upper end of the first connecting rod; the lower end of the movable seat is fixedly connected to a second fixed block, the second rotating part is a second shaft head pivotally connected to the second fixed block, and the second sliding part is a 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-down direction on the fixed seat, the second guide part is a second slide groove extending in the up-down direction 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, characterized in that: The first movable block is pivotally connected with a first roller embedded in the second slide groove and capable of rolling along the second slide groove; the second movable block is pivotally connected with a second roller embedded in the first slide groove and capable of rolling along the first slide groove.

9. The seat lumbar support adjustment mechanism according to claim 6, characterized in that: 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 outsides 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 as claimed in any one of claims 1 to 9.

Images