Waist supporting device, seat and vehicle

Abstract

The invention discloses a waist supporting device, a seat and a vehicle, the waist supporting device comprises a base, a sliding block, a waist rest and an elastic piece, the base is used for being fixedly installed on a backrest of the seat, a sliding hole extending in the thickness direction of the backrest is formed in the base, and the sliding block is arranged in the sliding hole in a sliding fit mode; the waist rest is connected with the sliding block and provided with a first critical position and a second critical position, the waist rest is gradually away from the backrest from the first critical position to the second critical position, the elastic piece is connected with the waist rest and the base, and the elastic piece presses the waist rest towards the second critical position. The waist supporting device provided by the invention has the advantages of good supporting stability on the waist of the user, high degree of freedom of movement of the waist of the user and high driving comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and more particularly to a lumbar support device, a seat and a vehicle. Background Art

[0002] In order to avoid the problem of lumbar discomfort caused by long-term sitting when users drive or ride in a vehicle, a lumbar support is often added to the lumbar part of the seat to support the lumbar region. However, in related technologies, the position of the lumbar support relative to the seat is fixed, and it can only support the user's lumbar region for a specific sitting posture. Once the user moves the lumbar region and the sitting posture changes, the lumbar support can no longer stably support the user's lumbar region. As a result, when the user drives or rides in a vehicle for a long time, the lack of movement of the lumbar region will cause soreness and pain in the lumbar region, and the riding comfort is poor. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0004] To this end, an embodiment of the present invention provides a lumbar support device, which has the advantages of good support stability for the user's lumbar region, high freedom of movement of the user's lumbar region, and high riding comfort.

[0005] An embodiment of the present invention also provides a seat.

[0006] An embodiment of the present invention further provides a vehicle.

[0007] The lumbar support device according to an embodiment of the present invention includes a base, a slider, a lumbar support and an elastic member. The base is used for fixedly mounting on the backrest of the seat, and a sliding hole extending in the thickness direction of the backrest is provided on the base; the slider is slidably engaged in the sliding hole; the lumbar support is connected to the slider and has a first critical position and a second critical position, and the lumbar support gradually moves away from the backrest from the first critical position to the second critical position; the elastic member connects the lumbar support and the base, and the elastic member presses the lumbar support toward the second critical position.

[0008] In the lumbar support device according to an embodiment of the present invention, after the mounting frame is installed on the backrest of the seat, the lumbar support can slide in the sliding hole through the slider to approach and move away from the backrest. And under the action of the elastic member, when the lumbar support is not affected by other external forces, it can be in the second critical position farthest from the backrest. When the user sits on the seat and the lumbar region abuts against the lumbar support, within the stroke range of the lumbar support, whether the user's lumbar region approaches or moves away from the backrest, the lumbar support can effectively support the user's lumbar region through the elastic member. That is, on the basis of ensuring the support of the user's lumbar region, the user's lumbar region has a higher degree of freedom of movement. The combination of the two effectively accelerates the blood circulation of the human lumbar and dorsal regions, effectively avoids the soreness and pain in the lumbar region caused by the long-term inactivity of the lumbar region, and the riding comfort of the user is high.

[0009] In some embodiments, the lumbar support device further includes a limit plate detachably connected to the base. A guide groove is defined between the base and the limit plate. The extending direction of the guide groove is the same as the axial direction of the sliding hole. The guide groove has a first limit surface and a second limit surface opposite to each other along the extending direction of the sliding hole.

[0010] The lumbar support device further includes a limit block connected to the slider. The limit block is slidably fitted in the guide groove. When the lumbar support is in the first critical position, the limit block abuts against the first limit surface. When the lumbar support is in the second critical position, the limit block abuts against the second limit surface.

[0011] In some embodiments, the sliding hole has a first end surface opposite to the slider. A guide post is provided on the first end surface. The guide post is coaxially arranged with the sliding hole.

[0012] The surface of the slider facing the first end surface is provided with a guide hole. The axial direction of the guide hole is the same as the axial direction of the sliding hole. The guide hole has a second end surface opposite to the first end surface. The elastic member includes a spring. The spring is fitted in the guide hole and the sliding hole. The spring is sleeved on the guide post and clamped between the first end surface and the second end surface.

[0013] In some embodiments, the base includes a first base plate and at least two cylinders provided on the same side of the first base plate. Each cylinder extends along the thickness direction of the backrest to form the sliding hole. The at least two cylinders are arranged along the width direction of the backrest.

[0014] The lumbar support device further includes a mounting bracket. The mounting bracket includes a first mounting portion, a second mounting portion and a third mounting portion connected in sequence. The backrest includes a first backrest frame side plate and a second backrest frame side plate arranged opposite to each other. The first mounting portion and the third mounting portion are respectively connected to the first backrest frame side plate and the second backrest frame side plate. The second mounting portion is connected to the first base plate through a fastener.

[0015] In some embodiments, the lumbar support device further includes a locking member. The locking member has an unlocking position and a locking position. The locking member in the locking position locks the lumbar support and the mounting bracket when the lumbar support is in the first critical position and / or the second critical position.

[0016] In some embodiments, the locking member includes a bolt. A first limiting hole is provided on the base, and the axial direction of the first limiting hole forms an angle with the axial direction of the sliding hole. A second limiting hole is provided on the slider. The bolt is slidably fitted in the first limiting hole between the unlocking position and the locking position, and the bolt is fitted in the second limiting hole at the locking position.

[0017] In some embodiments, the lumbar support device further includes a driving device. The driving device is installed on the base, and the driving end of the driving device is connected to the bolt. The moving direction of the driving end of the driving device is consistent with the axial direction of the first limiting hole.

[0018] In some embodiments, the lumbar support includes a foam and a first support frame. The first support frame includes a support portion embedded in the foam and a connecting portion exposed outside the foam. A second substrate is provided at one end of the slider away from the backrest, and the connecting portion is connected to the second substrate.

[0019] In some embodiments, the first support frame is a fixed steel wire. The connecting portion includes a first rod segment, a second rod segment, and a third rod segment. The first rod segment and the second rod segment both extend in a first direction, and the third rod segment extends in a second direction. The second direction forms an angle with the first direction;

[0020] The second substrate is correspondingly provided with a card slot, a first limiting slot, and a second limiting slot. The card slot and the first limiting slot both extend in the first direction, and the width direction of the second limiting slot is consistent with the first direction. The first rod segment is pivotally fitted in the first limiting slot, the second rod segment is clamped in the card slot, and the third rod segment is fitted in the second limiting slot.

[0021] The seat according to an embodiment of the present invention includes the lumbar support device as described in any of the above embodiments, and the base is connected to the backrest.

[0022] The technical advantages of the seat according to an embodiment of the present invention are the same as those of the lumbar support device in the above embodiments, and will not be described in detail here.

[0023] The vehicle according to an embodiment of the present invention includes the seat as described in the above embodiment.

[0024] The technical advantages of the vehicle according to an embodiment of the present invention are the same as those of the seat in the above embodiments, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a lumbar support device according to an embodiment of the present invention.

[0026] Figure 2It is another schematic diagram of the lumbar support device according to an embodiment of the present invention.

[0027] Figure 3 It is an exploded view of the lumbar support device according to an embodiment of the present invention.

[0028] Figure 4 It is a schematic diagram of the lumbar support device according to an embodiment of the present invention when the lumbar support is in the first critical position.

[0029] Figure 5 It is a schematic diagram of the lumbar support device according to an embodiment of the present invention when the lumbar support is in the second critical position.

[0030] Figure 6 It is another schematic diagram of the lumbar support device according to an embodiment of the present invention when the lumbar support is in the second critical position.

[0031] Reference numerals:

[0032] 1, mounting bracket; 2, lumbar support; 21, foam; 22, first support skeleton; 221, first rod section; 222, second rod section; 223, third rod section; 23, second support skeleton; 3, elastic member; 4, locking member; 51, base; 511, sliding hole; 512, guide groove; 513, first end face; 514, first base plate; 515, cylinder; 514, guide post; 515, first limiting hole; 52, limiting plate; 521, second limiting face; 61, slider; 611, guide hole; 612, second end face; 613, second limiting hole; 62, limiting block; 63, clamping groove; 64, first limiting groove; 65, second limiting groove; 66, second base plate; 7, driving device; 8, first side plate of the backrest skeleton; 9, second side plate of the backrest skeleton. Detailed description of the specific implementation

[0033] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] The following will be combined with Figures 1 - 6 Describe the lumbar support device according to an embodiment of the present invention.

[0035] The lumbar support device according to an embodiment of the present invention includes a base 51, a slider 61, a lumbar support 2 and an elastic member 3. The base 51 is used for fixedly mounting on the backrest of the seat, and a sliding hole 511 extending in the thickness direction of the backrest is provided on the base 51. The slider 61 is slidably fitted in the sliding hole 511. The lumbar support 2 is connected to the slider 61 and has a first critical position and a second critical position. The lumbar support 2 gradually moves away from the backrest from the first critical position to the second critical position. The elastic member 3 connects the lumbar support 2 and the base 51, and the elastic member 3 presses the lumbar support 2 towards the second critical position.

[0036] According to the lumbar support device of an embodiment of the present invention, the base 51 is installed behind the seat backrest. The lumbar support 2 can slide in the sliding hole 511 through the slider 61 to approach and move away from the backrest. And under the action of the elastic member 3, when the lumbar support 2 is not subjected to other external forces, it can be in the second critical position farthest from the backrest. When a user sits on the seat and the waist abuts against the lumbar support 2, within the stroke range of the lumbar support 2, whether the user's waist approaches or moves away from the backrest, the lumbar support 2 can effectively support the user's waist through the elastic member 3. That is, on the basis of ensuring that the user's waist is supported, the user's waist has a higher degree of freedom of movement. The combination of the two effectively accelerates the blood circulation of the human lumbar and dorsal regions, effectively avoids the soreness and pain caused by the user's waist being inactive for a long time, and the driving and riding comfort of the user is high.

[0037] It should be noted that after the base 51 is fixed on the backrest, the lumbar support 2 mainly acts on the sacroiliac joint of the user. And by setting the elastic force of the elastic member 3, the supporting force of the lumbar support 2 on the sacroiliac joint is controlled within a reasonable range to meet the needs of people with different weights, so as to better increase the blood circulation of the human body when the user's waist moves.

[0038] In some embodiments, as Figures 4 - 6 shown, the lumbar support device further includes a limiting plate 52. The limiting plate 52 is detachably connected to the base 51. A guiding groove 512 is defined between the base 51 and the limiting plate 52. The extending direction of the guiding groove 512 is the same as the axial direction of the sliding hole 511. The guiding groove 512 has a first limiting surface and a second limiting surface 521 opposite to each other along the extending direction of the sliding hole 511. The lumbar support device further includes a limiting block 62. The limiting block 62 is slidably engaged in the guiding groove 512. When the lumbar support 2 is in the first critical position, the limiting block 62 abuts against the first limiting surface. When the lumbar support 2 is in the second critical position, the limiting block 62 abuts against the second limiting surface 521.

[0039] The first limiting surface and the second limiting surface 521 prevent the limiting block 62 from disengaging from the guiding groove 512, and further prevent the slider 61 from disengaging from the sliding hole 511, ensuring the accurate and reliable movement of the lumbar support 2 between the first critical position and the second critical position.

[0040] Specifically, as Figure 3 and Figure 6 shown, the base 51 constitutes the first limiting surface, and the limiting plate 52 constitutes the second limiting surface 521.

[0041] At this time, the slider 61 can be first fitted into the sliding hole 511 of the base 51, the limiting block 62 can be fitted into the guiding groove 512 of the base 51, and then the limiting plate 52 is connected to the base 51, and the assembly of the lumbar support device can be realized.

[0042] Among them, as Figure 3As shown, the limiting plate 52 can be threadedly connected to the base 51 through a plurality of threaded members, so that the connection strength between the two is high, and the disassembly and assembly of the lumbar support device are convenient.

[0043] In some embodiments, as Figures 3 - 6 shown, the sliding hole 511 has a first end face 513 opposite to the slider 61. A guiding post 514 is provided on the first end face 513, and the guiding post 514 is coaxially arranged with the sliding hole 511. A guiding hole 611 is provided on the surface of the slider 61 facing the first end face 513. The axial direction of the guiding hole 611 is consistent with the axial direction of the sliding hole 511. The guiding hole 611 has a second end face 612 opposite to the first end face 513. The elastic member 3 includes a spring, and the spring is fitted in the guiding hole 611 and the sliding hole 511. The spring is sleeved on the guiding post 514 and clamped between the first end face 513 and the second end face 612.

[0044] Under the guidance of the guiding post 514 and the guiding hole 611, the spring has high supporting stability for the lumbar support 2. When the lumbar support 2 moves between the first critical position and the second critical position, the spring is not easily bent, resulting in the failure of the elastic support for the lumbar support 2.

[0045] As Figures 3 - 5 shown, the guiding post 514 is a hollow cylinder, and the axial dimension of the guiding post 514 is generally equal to the axial dimension of the sliding hole 511.

[0046] In some embodiments, as Figure 3 shown, the base 51 includes a first substrate 514 and at least two cylinders 515 provided on the same side of the first substrate 514. Each cylinder 515 extends along the thickness direction of the backrest and forms a sliding hole 511, and at least two cylinders 515 are arranged along the width direction of the backrest. At this time, there are at least two sliders 61 and elastic members 3 corresponding to the sliding holes 511. Under the guiding and limiting of at least two cylinders 515 arranged along the width direction of the backrest, the lumbar support 2 has higher movement stability and is more labor-saving relative to the backrest along the thickness direction of the backrest.

[0047] As Figure 2 and Figure 3 shown, the lumbar support device further includes a mounting frame 1. The mounting frame 1 includes a first mounting portion, a second mounting portion and a third mounting portion connected in sequence. The backrest includes a first backrest frame side plate 8 and a second backrest frame side plate 9 arranged oppositely. The first mounting portion and the third mounting portion are respectively connected to the first backrest frame side plate 8 and the second backrest frame side plate 9, and the second mounting portion is connected to the first substrate 514 through fasteners. That is, the base 51 and the lumbar support 2 connected thereto are fixedly installed at the central position of the backrest along its width direction, ensuring the reliable support of the lumbar support 2 for the user's waist.

[0048] Specifically, as Figure 3As shown, there are two barrel bodies 515 arranged at intervals along the width direction of the backrest. The first mounting part and the third mounting part of the mounting frame 1 are respectively connected to the first side plate 8 of the backrest frame and the second side plate 9 of the backrest frame through threaded parts, and the second mounting part in the middle is connected to the first substrate 514 through threaded parts.

[0049] In some embodiments, the lumbar support device further includes a locking member 4. The locking member 4 has an unlocking position and a locking position. The locking member 4 in the locking position locks the lumbar support 2 and the mounting frame 1 when the lumbar support 2 is in the first critical position and / or the second critical position.

[0050] That is, when the lumbar support 2 does not need to adaptively support the user's waist, the lumbar support 2 can be maintained at the first critical position and / or the second critical position through the locking member 4. At this time, the lumbar support 2 can provide a more stable and reliable support for the user's waist to meet the user's usage requirements in different scenarios.

[0051] Exemplarily, as Figure 4 and Figure 5 shown, the locking member 4 only locks the lumbar support 2 and the mounting frame 1 when the lumbar support 2 is in the first critical position. At this time, the lumbar support 2 is closer to the backrest, avoiding the fixed lumbar support 2 being too far away from the backrest and occupying too much space in the waist part of the backrest, thereby avoiding insufficient seating space for the user and affecting the seating comfort.

[0052] In some embodiments, as Figure 4 and Figure 5 shown, the locking member 4 includes a plug pin. The base 51 is provided with a first limiting hole 515. The axial direction of the first limiting hole 515 forms an angle with the axial direction of the sliding hole 511. The slider 61 is provided with a second limiting hole 613. The plug pin is slidably fitted in the first limiting hole 515 between the unlocking position and the locking position, and the plug pin is fitted in the second limiting hole 613 in the locking position.

[0053] When the backrest is in the first critical position and / or the second critical position, the first limiting hole 515 and the second limiting hole 613 are coaxial. At this time, by moving the plug pin to fit the plug pin in the first limiting hole 515 and the second limiting hole 613 at the same time, the locking of the backrest on the mounting frame 1 can be achieved. Similarly, by pulling out the plug pin from the second limiting hole 613, the unlocking of the backrest can be achieved. The locking and unlocking operations of the backrest are convenient and reliable.

[0054] Specifically, the second limiting hole 613 is arranged on the peripheral wall of the slider 61.

[0055] In some embodiments, the lumbar support device further includes a driving device 7. The driving device 7 is installed on the base 51. The driving end of the driving device 7 is connected to the plug pin, and the moving direction of the driving end of the driving device 7 is consistent with the axial direction of the first limiting hole 515.

[0056] By arranging the control unit of the driving device 7 at a position convenient for user operation, when the user is driving or riding in a vehicle, the lumbar support 2 can be automatically unlocked and locked without stopping the vehicle. The unlocking and locking operations of the lumbar support 2 are highly safe, and the user satisfaction is higher.

[0057] Specifically, the driving device 7 can be a linear motor or other linear driving mechanisms. There are two driving devices 7 and bolts respectively, and they are arranged in one-to-one correspondence.

[0058] In some embodiments, as Figure 1 and Figure 2 shown, the lumbar support 2 includes a foam 21 and a first support frame 22. The first support frame 22 includes a support part embedded in the foam 21 and a connecting part exposed outside the foam 21. One end of the slider 61 away from the backrest is provided with a second substrate 66, and the connecting part is connected to the second substrate 66.

[0059] The lumbar support 2 realizes the support for the user's waist through the foam 21. The elastically deformable characteristic of the foam 21 ensures that its support for the waist is softer, and the user's comfort is higher.

[0060] It should be noted that the lumbar support 2 may further include a second support frame 23 and a cover. Part of the second support frame 23 is embedded in the foam 21. The cover covers the outer surface of the foam 21 and is connected to the part of the second support frame 23 exposed outside the foam 21. The cover prevents the foam 21 from being exposed, so that the service life of the foam 21 is longer.

[0061] In some embodiments, as Figures 1 - 3 shown, the first support frame 22 is a fixed steel wire. The connecting part includes a first rod section 221, a second rod section 222 and a third rod section 223. The first rod section 221 and the second rod section 222 both extend along a first direction, and the third rod section 223 extends along a second direction. The second direction forms an angle with the first direction. The second substrate 66 is correspondingly provided with a card slot 63, a first limiting slot 64 and a second limiting slot 65. The card slot 63 and the first limiting slot 64 both extend along the first direction, and the width direction of the second limiting slot 65 is the same as the first direction. The first rod section 221 is pivotally fitted in the first limiting slot 64, the second rod section 222 is clamped in the card slot 63, and the third rod section 223 is fitted in the second limiting slot 65.

[0062] That is, the first rod segment 221 can be first fitted into the first limiting groove 64, and then the lumbar support 2 is rotated around the axis of the first rod segment 221 so that the second rod segment 222 is clamped with the clamping groove 63, and the third rod segment 223 is fitted into the second limiting groove 65. Wherein, the clamping of the second rod segment 222 with the clamping groove 63 ensures the relative fixation of the lumbar support 2 and the second substrate 66 in a direction other than the first direction, and the cooperation of the third rod segment 223 with the second limiting groove 65 ensures the relative fixation of the lumbar support 2 and the second substrate 66 in the first direction, and the connection between the lumbar support 2 and the second substrate 66 is convenient and reliable.

[0063] Specifically, as Figure 3 shown, the first direction is generally the width direction of the backrest, the second direction is perpendicular to the first direction and is generally the thickness direction of the backrest, the clamping groove 63 is generally a U-shaped groove, and its width at the notch is smaller than that at other positions, so as to prevent the second rod segment 222 from disengaging from the clamping groove 63 after the second rod segment 222 is fitted into the clamping groove 63.

[0064] The seat according to an embodiment of the present invention includes the lumbar support device as described in any one of the above embodiments, and the base 51 is connected to the backrest.

[0065] The technical advantages of the seat according to an embodiment of the present invention are the same as those of the lumbar support device in the above embodiments, and will not be described in detail here.

[0066] The vehicle according to an embodiment of the present invention includes the seat as described in the above embodiment.

[0067] The technical advantages of the vehicle according to an embodiment of the present invention are the same as those of the seat in the above embodiments, and will not be described in detail here.

[0068] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0069] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0070] In the present invention, unless otherwise clearly defined or limited, terms such as "installed", "connected", "linked", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the present invention, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0072] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0073] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A lumbar support device, characterized in that, Comprising: A base for fixedly mounting on the backrest of a seat, the base being provided with a sliding hole extending in the thickness direction of the backrest; A slider slidably fitted in the sliding hole; A lumbar support connected to the slider and having a first critical position and a second critical position, the lumbar support gradually moving away from the backrest from the first critical position towards the second critical position; And An elastic member connecting the lumbar support and the base, the elastic member pressing the lumbar support towards the second critical position.

2. The lumbar support device according to claim 1, characterized in that, The lumbar support device further includes a limiting plate detachably connected to the base, a guiding groove being defined between the base and the limiting plate, the extending direction of the guiding groove being the same as the axial direction of the sliding hole, the guiding groove having a first limiting surface and a second limiting surface opposite to each other along the extending direction of the sliding hole; The lumbar support device further includes a limiting block connected to the slider, the limiting block being slidably fitted in the guiding groove, when the lumbar support is in the first critical position, the limiting block abuts against the first limiting surface, and when the lumbar support is in the second critical position, the limiting block abuts against the second limiting surface.

3. The lumbar support device according to claim 2, characterized in that, The sliding hole has a first end face opposite to the slider, the first end face being provided with a guiding post coaxially arranged with the sliding hole; The surface of the slider facing the first end face is provided with a guiding hole, the axial direction of the guiding hole being the same as the axial direction of the sliding hole, the guiding hole having a second end face opposite to the first end face, the elastic member including a spring, the spring being fitted in the guiding hole and the sliding hole, the spring being sleeved on the guiding post and clamped between the first end face and the second end face.

4. The lumbar support device according to claim 1, characterized in that The base includes a first substrate and at least two cylinders provided on the same side of the first substrate, each cylinder extending in the thickness direction of the backrest and forming the sliding hole, the at least two cylinders being arranged in the width direction of the backrest; The lumbar support device further includes a mounting bracket, the mounting bracket including a first mounting portion, a second mounting portion and a third mounting portion connected in sequence, the backrest including a first backrest frame side plate and a second backrest frame side plate arranged oppositely, the first mounting portion and the third mounting portion are respectively connected to the first backrest frame side plate and the second backrest frame side plate, and the second mounting portion is connected to the first substrate by a fastener.

5. The lumbar support device according to any one of claims 1-4, characterized in that, The lumbar support device further includes a locking member having an unlocking position and a locking position, the locking member in the locking position locking the lumbar support and the mounting bracket when the lumbar support is in the first critical position and / or the second critical position.

6. The lumbar support device according to claim 5, characterized in that The locking member includes a plug pin, the base being provided with a first limiting hole, the axial direction of the first limiting hole being at an angle to the axial direction of the sliding hole, the slider being provided with a second limiting hole, the plug pin being slidably fitted in the first limiting hole between the unlocking position and the locking position, and the plug pin being fitted in the second limiting hole in the locking position.

7. The lumbar support device according to claim 6, wherein The lumbar support device further includes a driving device, which is installed on the base. The driving end of the driving device is connected to the bolt, and the moving direction of the driving end of the driving device is consistent with the axial direction of the first limiting hole.

8. The lumbar support device according to claim 1, characterized in that, The lumbar support includes a foam and a first support frame. The first support frame includes a support part embedded in the foam and a connecting part exposed outside the foam. A second substrate is provided at one end of the slider away from the backrest, and the connecting part is connected to the second substrate.

9. The lumbar support device according to claim 8, characterized in that, The first support frame is a fixed steel wire. The connecting part includes a first rod section, a second rod section and a third rod section. The first rod section and the second rod section both extend in a first direction, and the third rod section extends in a second direction. The second direction forms an angle with the first direction. The second substrate is correspondingly provided with a card slot, a first limiting slot and a second limiting slot. The card slot and the first limiting slot both extend in the first direction, and the width direction of the second limiting slot is consistent with the first direction. The first rod section is pivotally fitted in the first limiting slot, the second rod section is clamped in the card slot, and the third rod section is fitted in the second limiting slot.

10. A seat, characterized in that, It includes a backrest and the lumbar support device according to any one of claims 1-9, and the base is connected to the backrest.

11. A vehicle, characterized in that, It includes a seat according to claim 10.

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