Lumbar support assembly and seat comprising same

Abstract

The utility model provides a kind of lumbar support assembly and seat comprising it.The lumbar support assembly includes lumbar support, and the lumbar support assembly further includes: mounting seat, for being installed on the back of seat, the side for being used to towards lumbar support on mounting seat has first locking cooperation part, the side for being used to towards mounting seat on lumbar support has second locking cooperation part, first locking cooperation part and second locking cooperation part are adapted and all have locking hole;Locking piece, it can be set in locking hole, and locking piece is configured as can be operated to move between locking position and unlocking position, to make lumbar support can be switched between adaptive mode and fixed mode.Adaptive mode, the position of lumbar support relative to mounting seat is adjustable;When being in fixed mode, lumbar support is fixed relative to mounting seat.The lumbar support assembly can be switched between adaptive mode and fixed mode more flexibly according to user use demand, and the scope of application is wider, and then a variety of use requirements of user can be satisfied.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to a lumbar support assembly and a seat including the same. Background Technology

[0002] A standard chair consists of a connected backrest and seat. As users demand more and more comfort, many chairs are equipped with lumbar support, which is usually installed on the backrest, above the seat, to correspond to the position of the user's waist.

[0003] However, most existing lumbar supports are adaptively adjustable but cannot be locked, or can only be locked without adaptive adjustment, which limits their applicability and makes them unsuitable for meeting the diverse needs of users. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of existing seats in terms of limited applicability and inability to meet the diverse needs of users, and to provide a lumbar support component and a seat including the component.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A lumbar support assembly for a seat, the lumbar support assembly including a lumbar support, the lumbar support assembly further including: a mounting base for mounting on the back of the seat, the mounting base having a first locking engagement portion on a side facing the lumbar support, and the lumbar support having a second locking engagement portion on a side facing the mounting base, the first locking engagement portion and the second locking engagement portion being adapted to each other and both having locking holes; and

[0007] A locking member is capable of passing through the locking holes of the first locking engagement portion and the second locking engagement portion, and the locking member is configured to be operable to move between a locked position and an unlocked position so that the lumbar support can switch between an adaptive mode and a fixed mode;

[0008] When the lumbar support is in adaptive mode, the position of the lumbar support relative to the mounting base is adjustable;

[0009] When the lumbar support is in the fixed mode, the lumbar support is fixed relative to the mounting base.

[0010] In this solution, by operating the locking mechanism, the locking mechanism can move between a locked position and an unlocked position, thereby enabling the lumbar support to switch between adaptive and fixed modes. Specifically, when the lumbar support needs to be in adaptive mode, the locking mechanism can be moved to the unlocked position; when the lumbar support needs to be in fixed mode, the locking mechanism can be moved to the locked position. Therefore, this lumbar support assembly can flexibly switch between adaptive and fixed modes according to user needs, making it widely applicable and able to meet various user requirements.

[0011] Preferably, one of the locking hole and the locking member is provided with a locking groove, and the other is provided with a locking protrusion;

[0012] When the locking member is in the locked position, the locking protrusion is engaged in the locking groove;

[0013] When the locking member is in the unlocked position, the locking protrusion disengages from the locking groove.

[0014] In this design, the locking groove and the locking protrusion work together to facilitate the movement of the locking component between the locked and unlocked positions, which helps to simplify the structure of the lumbar support assembly.

[0015] Preferably, the locking protrusion is disposed on the outer wall surface of the locking member, and the locking holes of the first locking mating part and the second locking mating part are both provided with the locking groove, and the locking groove is connected to the locking hole.

[0016] In this design, the locking protrusion is placed on the outer wall of the locking component, and the locking groove is placed on the locking hole. This helps to reduce the impact on the strength of the locking component and reduce the structural requirements of the locking component. As a result, while ensuring the strength of the lumbar support assembly, the structure of the lumbar support assembly can be simplified as much as possible, and the space occupied by the lumbar support assembly can be reduced.

[0017] Preferably, there are multiple locking protrusions and multiple locking grooves, and the multiple locking protrusions are provided in a one-to-one correspondence with the multiple locking grooves;

[0018] The plurality of locking protrusions are spaced apart along the circumferential direction of the locking member.

[0019] In this solution, by setting multiple locking protrusions and locking grooves, the locking member can have multiple locking points when it is in the locking position, which helps to ensure the reliability of the locking member in the locking position, and correspondingly, also helps to ensure the reliability of the lumbar support in the fixed mode.

[0020] Preferably, the locking member is configured to move between the locked position and the unlocked position by means of a pulling motion or rotation.

[0021] In this solution, the above-mentioned structure allows the locking mechanism to switch between lumbar support modes by pulling or rotating. This design is flexible and easy to operate, which helps improve the efficiency of mode switching.

[0022] Preferably, the lumbar support assembly further includes an elastic element, one end of which is fixed to one of the mounting base and the lumbar support, and the other end of which faces and abuts against the other of the mounting base and the lumbar support;

[0023] When the lumbar support is in adaptive mode, the position of the lumbar support relative to the mounting base is adjusted by the elastic element.

[0024] In this solution, the above-mentioned structural setting is adopted, and the lumbar support position can be adjusted in adaptive mode through the elastic element. The adjustment is convenient, and the elastic element can provide a certain cushioning effect, so the comfort during the adjustment process can also be guaranteed.

[0025] Preferably, along the height direction of the lumbar support, the elastic element is located above the first locking engagement portion and the second locking engagement portion;

[0026] And / or, the mounting base has a first shielding part, the lumbar support has a second shielding part, the first shielding part and the second shielding part are joined together to form a shielding area, and the elastic member is located within the shielding area.

[0027] In this design, the aforementioned structural arrangement places the elastic element above the first and second locking engagement parts. This allows the locking element to be adjusted in adaptive mode without completely disengaging from the locking hole, simplifying operation and improving mode switching efficiency. Furthermore, the relatively high adjustment position in adaptive mode facilitates user adjustment. Additionally, the first and second shielding parts conceal the elastic element, protecting it without compromising aesthetics.

[0028] Preferably, the first locking engagement portion includes a first locking engagement unit and a second locking engagement unit spaced apart along the axial direction of the locking hole, the second locking engagement portion being embedded between the first locking engagement unit and the second locking engagement unit, the locking unit being sequentially passed through the first locking engagement unit, the second locking engagement portion and the second locking engagement unit, and both the first locking engagement unit and the second locking engagement portion being provided with the locking groove;

[0029] Alternatively, the first locking engagement portion includes a first locking engagement unit and a second locking engagement unit spaced apart along the axial direction of the locking hole. The second locking engagement portion is embedded between the first locking engagement unit and the second locking engagement unit. The locking unit passes through the first locking engagement unit, the second locking engagement portion, and the second locking engagement unit in sequence. Both the first locking engagement unit and the second locking engagement portion are provided with the locking groove. The elastic element is located in the area of ​​the second locking engagement portion and is located above the second locking engagement portion.

[0030] In this design, the aforementioned structural arrangement is adopted, with the second locking engagement part embedded between the first and second locking engagement units of the first locking engagement part. The first and second locking engagement parts have a nested relationship, which improves the reliability of the connection and makes the lumbar support assembly structure more compact. Specifically, for the first locking engagement part, only the first locking engagement unit has a locking groove. This allows for switching from a fixed mode to an adaptive mode without completely disengaging the locking member from the locking hole; only the locking protrusion needs to disengage from the corresponding locking groove. This simplifies operation and improves the efficiency of lumbar support mode switching. Furthermore, the elastic element is located in the area corresponding to the second locking engagement part, placing it in a relatively central position. This helps ensure the stability of adjustment in adaptive mode and further contributes to the compactness of the lumbar support assembly structure.

[0031] Preferably, a first gap is formed between the outer wall surface of the locking member and the inner wall surface of the locking hole, and the first gap is between 0.2-0.5 mm;

[0032] And / or, a second gap is formed between both sides of the locking protrusion and the inner wall of the locking groove, the second gap being between 0.2-0.5mm.

[0033] In this design, using the aforementioned structural configuration, regarding the first gap, if the gap is too large, the locking component will easily wobble relative to the locking hole, making the lumbar support unstable and affecting the user experience. If the gap is too small, the adjustment range of the lumbar support position in adaptive mode will be very limited, potentially rendering the adaptive mode ineffective. Regarding the second gap, if the gap is too large, the locking component will also easily wobble relative to the locking hole, making the lumbar support unstable and affecting the user experience. If the gap is too small, it will be difficult to install the locking component, and once installed, the locking component will be difficult to operate, hindering position adjustment and thus making lumbar support mode switching inconvenient.

[0034] This utility model also provides a seat, including a backrest, and the seat further includes the aforementioned lumbar support assembly.

[0035] The positive and progressive effects of this utility model are as follows:

[0036] In this application, by operating the locking component, the locking component can move between a locked position and an unlocked position, thereby enabling the lumbar support to switch between an adaptive mode and a fixed mode. Specifically, when the lumbar support is required to be in the adaptive mode, the locking component can be operated to move it to the unlocked position; when the lumbar support is required to be in the fixed mode, the locking component can be operated to move it to the locked position. Therefore, this lumbar support assembly can flexibly switch between adaptive and fixed modes according to user needs, has a wide range of applications, and can meet various user requirements. Correspondingly, a seat including this lumbar support assembly can also meet various user needs. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of a seat according to an embodiment of the present invention.

[0038] Figure 2 This is a partial structural diagram of a seat according to an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of another part of the structure of the seat according to an embodiment of the present invention. Figure 3 Is with Figure 2 A structural diagram from another perspective.

[0040] Figure 4 This is a schematic diagram of the lumbar support assembly according to an embodiment of the present invention.

[0041] Figure 5 This is another structural schematic diagram of the lumbar support assembly according to an embodiment of the present invention. Figure 5 Is with Figure 4 A structural diagram from another perspective.

[0042] Figure 6 This is a schematic diagram of the internal structure of a lumbar support assembly according to an embodiment of the present invention.

[0043] Figure 7 This is a partial structural diagram of a lumbar support assembly according to an embodiment of the present invention. The lumbar support is not shown in the figure.

[0044] Figure 8 This is a schematic diagram of another part of the lumbar support assembly according to an embodiment of the present invention. The lumbar support and elastic element are not shown in the figure.

[0045] Figure 9 This is a schematic diagram of another part of the lumbar support assembly according to an embodiment of the present invention, where the mounting base is not shown.

[0046] Figure 10This is a schematic diagram of the lumbar support structure in a lumbar support assembly according to an embodiment of the present invention.

[0047] Figure 11 This is a schematic diagram of the mounting base in a lumbar support assembly according to an embodiment of the present invention.

[0048] Figure 12 This is another structural schematic diagram of the mounting base in the lumbar support assembly according to an embodiment of the present invention. Figure 12 Is with Figure 11 A structural diagram from another perspective.

[0049] Figure 13 This is a schematic diagram of the locking component in a lumbar support assembly according to an embodiment of the present invention.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1 chair back

[0052] 2 chair seats

[0053] 3-lumbar support components

[0054] 10 lumbar support

[0055] 101 Second Locking Part

[0056] 102 Second Locking Hole

[0057] 103 Second Locking Groove

[0058] 104 Second shielding section

[0059] 20 mounting brackets

[0060] 201 First Locking Fitting Part

[0061] 202 First Locking Hole

[0062] 203 First Locking Groove

[0063] 204 Mounting Boss

[0064] 205 First Shielding Section

[0065] 206 First Locking Unit

[0066] 207 Second Locking Unit

[0067] 30 locking parts

[0068] 301 Locking Protrusion

[0069] 302 Locking Bar

[0070] 303 locking sleeve

[0071] 304 locknut

[0072] 40 elastic elements Detailed Implementation

[0073] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0074] like Figures 1 to 13 As shown, this embodiment provides a lumbar support assembly 3 and a seat including the same. The seat includes a backrest 1, a seat 2, and the lumbar support assembly 3. The lumbar support assembly 3 is mounted on the backrest 1 and located above the seat 2.

[0075] Specifically regarding lumbar support component 3, refer to... Figures 1 to 13 It is understood that the lumbar support assembly 3 includes a lumbar support 10, a mounting base 20, and a locking member 30. The mounting base 20 is used to mount on the backrest 1 of the seat. The mounting base 20 has a first locking engagement portion 201 on the side facing the lumbar support 10, and the lumbar support 10 has a second locking engagement portion 101 on the side facing the mounting base 20. The first locking engagement portion 201 and the second locking engagement portion 101 are adapted to each other and both have locking holes. For ease of description, the locking hole on the first locking engagement portion 201 is referred to as the first locking hole 202, and the locking hole on the second locking engagement portion 101 is referred to as the second locking hole 102. The locking member 30 can pass through the first locking hole 202 on the first locking engagement portion 201 and the second locking hole 102 on the second locking engagement portion 101, and the locking member 30 is configured to be operable to move between a locked position and an unlocked position, so that the lumbar support 10 can switch between an adaptive mode and a fixed mode. When the lumbar support 10 is in adaptive mode, its position relative to the mounting base 20 is adjustable. When the lumbar support 10 is in fixed mode, its position relative to the mounting base 20 is fixed.

[0076] In this embodiment, by operating the locking member 30, the locking member 30 can move between a locked position and an unlocked position, thereby enabling the lumbar support 10 to switch between an adaptive mode and a fixed mode. Specifically, when the lumbar support 10 needs to be in the adaptive mode, the locking member 30 can be operated to move it to the unlocked position; when the lumbar support 10 needs to be in the fixed mode, the locking member 30 can be operated to move it to the locked position. Therefore, this lumbar support assembly 3 can flexibly switch between adaptive and fixed modes according to user needs, has a wide range of applications, and can meet various user requirements.

[0077] It should be noted that the main improvement in this application is related to the lumbar support assembly 3; the backrest 1 and seat 2 can both adopt the structures of the prior art. As for the installation method of the mounting base 20 and the backrest 1, it can also follow the existing technology.

[0078] To achieve the engagement between the locking member 30 and the locking hole, and to enable the locking member 30 to switch between the locked and unlocked positions, as an example, a locking groove can be provided on one of the locking hole and the locking member 30, and a locking protrusion 301 can be provided on the other. When the locking member 30 is in the locked position, the locking protrusion 301 is engaged in the locking groove; when the locking member 30 is in the unlocked position, the locking protrusion 301 disengages from the locking groove. It should be noted that the locking hole here includes a first locking hole 202 and a second locking hole 102.

[0079] Here, the locking groove and the locking protrusion 301 work together to facilitate the movement of the locking member 30 between the locked and unlocked positions, which helps to simplify the structure of the lumbar support assembly 3.

[0080] Specifically, in this embodiment, as a preferred setting, such as Figures 4 to 13 As shown, the locking protrusion 301 is provided on the outer wall surface of the locking member 30. Both the first locking hole 202 of the first locking mating part 201 and the second locking hole 102 of the second locking mating part 101 have locking grooves, and these locking grooves are connected to the locking holes. For ease of description, the locking groove provided on the first locking hole 202 is referred to as the first locking groove 203, and the locking groove provided on the second locking hole 102 is referred to as the second locking groove 103.

[0081] This configuration, with the locking protrusion 301 located on the outer wall of the locking member 30 and the locking groove located on the locking hole, helps to reduce the impact on the strength of the locking member 30 and lower the structural requirements of the locking member 30. This allows for a simplification of the structure of the lumbar support assembly 3 and a reduction in the space occupied by the lumbar support assembly 3 while ensuring its strength. If the locking groove were located on the outer wall of the locking member 30, to ensure its strength, the opening of the locking groove would need to be designed to not excessively affect the strength of the locking member 30. This would require the locking member 30 to be relatively thick or have greater inherent strength, consequently occupying a larger space.

[0082] In this embodiment, there is one locking protrusion 301. However, in other alternative embodiments, there are multiple locking protrusions 301 and multiple locking grooves, with each locking protrusion 301 corresponding to a different locking groove, and the multiple locking protrusions 301 are spaced apart along the circumferential direction of the locking member 30. This arrangement, by using multiple locking protrusions 301 and locking grooves, allows the locking member 30 to have multiple locking points when in the locked position, which helps ensure the reliability of the locking member 30 in the locked position, and correspondingly, also helps ensure the reliability of the lumbar support 10 in the fixed mode.

[0083] In this embodiment, the locking member 30 is configured to move between the locked position and the unlocked position by a pulling motion, which is simple to operate and can be done by a simple pulling operation.

[0084] In other alternative embodiments, the locking member 30 may also be configured to move between a locked position and an unlocked position by rotation.

[0085] In other words, the locking component 30 can switch the lumbar support mode 10 by pulling it out or by rotating it. The design is flexible and easy to operate, which helps to improve the efficiency of mode switching.

[0086] At least as Figure 7 and Figure 9 As shown, the lumbar support assembly 3 also includes an elastic element 40. One end of the elastic element 40 is fixed to one of the mounting base 20 and the lumbar support 10, and the other end faces and abuts against the other of the mounting base 20 and the lumbar support 10. When the lumbar support 10 is in adaptive mode, the position of the lumbar support 10 relative to the mounting base 20 is adjusted by the elastic element 40. The elastic element 40 facilitates the adjustment of the lumbar support 10 position in adaptive mode, and provides a certain degree of cushioning, ensuring comfort during adjustment. Specifically, in this embodiment, the elastic element 40 is specifically configured as a spring.

[0087] In practical operation, when the lumbar support 10 is in adaptive mode, the position of the lumbar support 10 relative to the mounting base 20 can be adjusted relatively easily by appropriately compressing the spring or causing the spring to swing to a certain extent.

[0088] Combination Figures 7 to 12 It is understood that in this embodiment, the mounting base 20 is provided with a mounting boss 204, one end of the elastic member 40 is sleeved on the mounting boss 204 and fixed to the mounting base 20, and the other end of the elastic member 40 is used to abut against the wall surface of the lumbar support 10.

[0089] Furthermore, along the height direction of the lumbar support 10, the elastic element 40 is located above the first locking engagement portion 201 and the second locking engagement portion 101. With this structural arrangement, placing the elastic element 40 above the first locking engagement portion 201 and the second locking engagement portion 101 allows the locking element 30 to be adjusted in adaptive mode without completely disengaging from the locking hole, simplifying operation and improving mode switching efficiency. Furthermore, the relatively high adjustment position in adaptive mode facilitates user adjustment.

[0090] Alternatively or further, the mounting base 20 has a first blocking portion 205, and the lumbar support 10 has a second blocking portion 104. The first blocking portion 205 and the second blocking portion 104 are joined together to form a blocking area, and the elastic member 40 is located within the blocking area. The first blocking portion 205 and the second blocking portion 104 can block the elastic member 40, which can protect the elastic member 40 without affecting the aesthetics.

[0091] Specifically, in this embodiment, at least as follows: Figures 6 to 12 As shown, the first locking engagement portion 201 includes a first locking engagement unit and a second locking engagement unit spaced apart along the axial direction of the locking hole. The second locking engagement portion 101 is embedded between the first locking engagement unit and the second locking engagement unit. The locking unit passes through the first locking engagement unit, the second locking engagement portion 101, and the second locking engagement unit in sequence. Both the first locking engagement unit and the second locking engagement portion 101 are provided with locking grooves. That is, the first locking groove 203 is provided on the first locking engagement unit. The second locking engagement portion 101 is embedded between the first locking engagement unit and the second locking engagement unit of the first locking engagement portion 201. The first locking engagement portion 201 and the second locking engagement portion 101 have a nested relationship, which is beneficial to improving the reliability of the connection and also makes the structure of the lumbar support assembly 3 more compact. Among them, the first locking engagement part 201 is provided with a locking groove only. This means that when switching from the fixed mode to the adaptive mode, it is not necessary for the locking member 30 to completely disengage from the locking hole. Only the locking protrusion 301 needs to disengage from the corresponding locking groove. This helps to simplify the operation and improve the efficiency of the lumbar support 10 mode switching.

[0092] Furthermore, the elastic element 40 is located within the area of ​​the second locking engagement portion 101, and is positioned above the second locking engagement portion 101. Here, the elastic element 40 is located within the area corresponding to the second locking engagement portion 101, making it positioned in a relatively central position. This helps to ensure the stability of the adjustment in the adaptive mode and also helps to further ensure the compactness of the lumbar support assembly 3.

[0093] like Figures 4 to 8 , Figure 13 As shown, in this embodiment, the locking component 30 includes a locking rod 302, a locking sleeve 303, and a locking nut 304. A locking protrusion 301 is disposed on the locking rod 302, and the locking sleeve 303 is disposed at the head of the locking rod 302. Preferably, the locking sleeve 303 is threadedly connected to the locking rod 302, allowing operation of the locking rod 302 by manipulating the locking sleeve 303. The locking nut 304 is disposed at the tail of the locking rod 302. After the locking rod 302 is adjusted to its correct position, the locking nut 304 is threadedly connected to the tail of the locking rod 302. Accordingly, when the locking rod 302 needs to be operated again, the locking nut 304 must first be loosened.

[0094] Referring to the figures above, a first gap is formed between the outer wall of the locking member 30 and the inner wall of the locking hole, with the first gap being between 0.2 and 0.5 mm. Specifically, in this embodiment, as a preferred setting, the first gap is set to 0.25 mm. If the first gap is too large, the locking member 30 will easily wobble relative to the locking hole, making the lumbar support 10 unstable and affecting the user experience. Conversely, if the gap is too small, the adjustment range of the lumbar support 10's position in adaptive mode will be very limited, potentially rendering the adaptive mode ineffective. This would also affect the elastic member 40, making it unable to rotate or adjust.

[0095] Similar to the first gap, a second gap is formed between both sides of the locking protrusion 301 and the inner wall of the locking groove, with the second gap being between 0.2-0.5mm. Specifically, in this embodiment, as a preferred setting, the second gap is set to 0.25mm. If the second gap is too large, the locking member 30 will easily wobble relative to the locking hole, making it easy for the lumbar support 10 to be installed insecurely, affecting the user experience; if the gap is too small, it will be difficult to install the locking member 30, and after installation, the locking member 30 will be difficult to operate, making it inconvenient to adjust the position of the locking member 30, and thus inconvenient to switch the mode of the lumbar support 10.

[0096] The following is a brief description of the mode switching operation of the lumbar support component 3.

[0097] When switching from the fixed mode to the adaptive mode, loosen the locking nut 304 and operate the locking sleeve 303 to pull the locking rod 302, so that the locking protrusion 301 on the locking rod 302 disengages from the first locking groove 203 and the second locking groove 103, causing the locking rod 302 to switch from the locked position to the unlocked position. At this time, the lumbar support 10 switches to the adaptive mode. In the adaptive adjustment mode, by adjusting the lumbar support 10, the elastic element 40 is compressed or swings within a preset range, thereby adjusting the position of the lumbar support 10 relative to the mounting base 20.

[0098] When switching from adaptive mode to fixed mode, the locking sleeve 303 is operated to pull the locking rod 302 (further inserting it in the direction that allows the locking rod 302 to extend into the first locking hole 202 and the second locking hole 102), causing the locking protrusion 301 on the locking rod 302 to engage with the first locking groove 203 and the second locking groove 103, thus switching the locking rod 302 from the unlocked position to the locked position. Then, the locking nut is tightened, at which point the lumbar support 10 switches to fixed mode. In fixed mode, the lumbar support 10 is fixed relative to the mounting base 20.

[0099] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A lumbar support assembly for a seat, the lumbar support assembly comprising a lumbar support, characterized in that, The lumbar support assembly further includes: a mounting base for mounting on the back of the seat, the mounting base having a first locking engagement portion on the side facing the lumbar support, and the lumbar support having a second locking engagement portion on the side facing the mounting base, the first locking engagement portion and the second locking engagement portion being adapted to each other and both having locking holes; and A locking member is capable of passing through the locking holes of the first locking engagement portion and the second locking engagement portion, and the locking member is configured to be operable to move between a locked position and an unlocked position so that the lumbar support can switch between an adaptive mode and a fixed mode; When the lumbar support is in adaptive mode, the position of the lumbar support relative to the mounting base is adjustable; When the lumbar support is in the fixed mode, the lumbar support is fixed relative to the mounting base.

2. The lumbar support assembly as described in claim 1, characterized in that, One of the locking hole and the locking member is provided with a locking groove, and the other is provided with a locking protrusion; When the locking member is in the locked position, the locking protrusion is engaged in the locking groove; When the locking member is in the unlocked position, the locking protrusion disengages from the locking groove.

3. The lumbar support assembly as described in claim 2, characterized in that, The locking protrusion is disposed on the outer wall surface of the locking member, and the locking holes of the first locking mating part and the second locking mating part are both provided with the locking groove, and the locking groove is connected to the locking hole.

4. The lumbar support assembly as described in claim 3, characterized in that, The number of locking protrusions and locking grooves are both multiple, and the multiple locking protrusions are provided in a one-to-one correspondence with the multiple locking grooves; The plurality of locking protrusions are spaced apart along the circumferential direction of the locking member.

5. The lumbar support assembly as described in claim 1, characterized in that, The locking element is configured to move between the locked position and the unlocked position by means of a pulling motion or rotation.

6. The lumbar support assembly as described in any one of claims 2-4, characterized in that, The lumbar support assembly also includes an elastic element, one end of which is fixed to one of the mounting base and the lumbar support, and the other end of which faces and abuts against the other of the mounting base and the lumbar support; When the lumbar support is in adaptive mode, the position of the lumbar support relative to the mounting base is adjusted by the elastic element.

7. The lumbar support assembly as described in claim 6, characterized in that, Along the height direction of the lumbar support, the elastic element is located above the first locking engagement portion and the second locking engagement portion; And / or, the mounting base has a first shielding part, the lumbar support has a second shielding part, the first shielding part and the second shielding part are joined together to form a shielding area, and the elastic member is located within the shielding area.

8. The lumbar support assembly as described in claim 6, characterized in that, The first locking engagement portion includes a first locking engagement unit and a second locking engagement unit spaced apart along the axial direction of the locking hole. The second locking engagement portion is embedded between the first locking engagement unit and the second locking engagement unit. The locking member passes through the first locking engagement unit, the second locking engagement portion and the second locking engagement unit in sequence. The first locking engagement unit and the second locking engagement portion are both provided with the locking groove. Alternatively, the first locking engagement portion includes a first locking engagement unit and a second locking engagement unit spaced apart along the axial direction of the locking hole. The second locking engagement portion is embedded between the first locking engagement unit and the second locking engagement unit. The locking member passes through the first locking engagement unit, the second locking engagement portion, and the second locking engagement unit in sequence. Both the first locking engagement unit and the second locking engagement portion are provided with the locking groove. The elastic member is located in the area of ​​the second locking engagement portion and is located above the second locking engagement portion.

9. The lumbar support assembly as described in any one of claims 2-4, characterized in that, A first gap is formed between the outer wall surface of the locking member and the inner wall surface of the locking hole, and the first gap is between 0.2-0.5mm. And / or, a second gap is formed between both sides of the locking protrusion and the inner wall of the locking groove, the second gap being between 0.2-0.5mm.

10. A seat, including a backrest, characterized in that, The seat also includes a lumbar support assembly as described in any one of claims 1-9.

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