Adjustable depth lumbar and seat

Abstract

The application discloses a depth-adjustable lumbar support of a seat, which comprises a lumbar support body and a depth adjustment device. The depth adjustment device comprises a connecting rod assembly, a support and a mounting. The support is connected to the rear end of the lumbar support body, and the mounting is configured to be connected to a back support. The connecting rod assembly comprises a first connecting rod and a second connecting rod. The middle parts of the first connecting rod and the second connecting rod are crossed and hinged together. The front ends of the first connecting rod and the second connecting rod are slidingly connected to the support, and the rear ends of the first connecting rod and the second connecting rod are slidingly connected to the mounting. When the first connecting rod rotates relative to the second connecting rod, the connecting rod assembly is unfolded forward or folded backward as a whole. The support slides forward or backward relative to the mounting, thereby driving the lumbar support body to slide forward or backward relative to the back support. A locking mechanism is arranged between the connecting rod assembly and the support or the mounting. The locking mechanism is configured to make the lumbar support body hover at a current depth position.

Description

Technical Field

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

[0002] Lumbar support is an important component of a chair designed to support the user's lower back. When users sit for long periods at work or study, the support helps prevent lower back fatigue and corrects posture, thus protecting lower back health and effectively preventing lumbar muscle strain, scoliosis, and other spinal diseases. Furthermore, as user needs evolve, the requirements for lumbar support are no longer limited to basic support functions. Different users have varying levels of support between their lower back and the chair back, meaning that lumbar support without adjustable fore-and-aft position will not be suitable for all types of users.

[0003] To address the aforementioned issues, existing patents provide a lumbar support device and a seat (application number: CN202421369112.X). The lumbar support device includes a back support, a lumbar support, and a telescopic assembly. The lumbar support is connected to the back support via the telescopic assembly. The adjustment assembly includes a telescopic sleeve, a telescopic component, a locking component, and an elastic component. By utilizing the telescopic sleeve, telescopic component, locking component, and elastic component of the telescopic assembly, the position of the lumbar support can be adjusted forward or backward.

[0004] However, the above solution has the following problems: the telescopic sleeve and telescopic component are interlocked and slide back and forth to adjust the depth of the lumbar support. The telescopic sleeve and telescopic component are relatively bulky in appearance and are easily exposed between the lumbar support and the back support, which is awkward and not aesthetically pleasing. In addition, in order to realize the front and back adjustment of the lumbar support, it is necessary to process the telescopic channel inside the telescopic sleeve with a clearance part, a snap-fit ​​part, a position groove and other structures, which is more complicated to manufacture and makes the assembly of the telescopic sleeve and telescopic component more troublesome. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an adjustable depth lumbar support and seat. The linkage assembly can be unfolded or folded by the relative rotation of two intersecting and hinged first and second links. The structure is simple and easy to manufacture. Moreover, the overall structure of the depth adjustment device is relatively compact and can be hidden between the lumbar support body and the back support, making it less likely to be exposed, thus making the seat lighter and more beautiful in appearance.

[0006] The effect of this utility model is achieved as follows: In a first aspect, this application provides an adjustable-depth lumbar support, including a lumbar support body and a depth adjustment device. The depth adjustment device includes a linkage assembly, a support member, and a mounting member. The support member is connected to the rear end of the lumbar support body, and the mounting member is configured to connect to a back support. The linkage assembly includes a first link and a second link, the middle parts of which intersect and are hinged together. The front ends of both the first and second links are slidably connected to the support member, and the rear ends of both the first and second links are slidably connected to the mounting member. This allows the linkage assembly to unfold forward or fold backward when the first link rotates relative to the second link, and the support member to slide back and forth relative to the mounting member, thereby causing the lumbar support body to slide back and forth relative to the back support. A locking mechanism is provided between the linkage assembly and the support member or mounting member, and the locking mechanism is configured to suspend the lumbar support body at the current depth position.

[0007] Furthermore, the first and second links are hinged together by a pivot, and the support member has a connecting groove with openwork along its front and rear directions. The locking mechanism includes an adjusting member, the rear end of which is hinged to the pivot, and the front end of which is slidably connected to the support member through the connecting groove. When the link assembly unfolds forward or folds backward, the adjusting member slides back and forth along the connecting groove. This improves the stability of the lumbar support depth adjustment operation.

[0008] Furthermore, the adjusting component is equipped with a stop section, one side of which has multiple slots arranged in a front-to-back direction. The locking mechanism also includes an elastic locking element, one end of which is connected to the support component, and the other end has a locking head that engages with the slot. The elastic locking element applies a spring force to the locking head, causing it to engage in the slot. When the adjusting component slides back and forth along the connecting groove, the locking head engages with the multiple slots sequentially under the spring force of the elastic locking element. This provides a tactile feedback to the lumbar support depth adjustment, further improving the stability of the adjustment operation.

[0009] Furthermore, the top of the adjusting component is recessed with a gear slot, and a gear position is positioned within the gear slot. An annular gap is formed between the gear position and the groove wall. The gap between the side of the gear position with the slot and the groove wall forms an adjustment zone, and the gap between the side of the gear position with the slot and the groove wall forms a reset zone. When the adjusting component slides forward along the connecting groove, the locking head slides within the adjustment zone; when the adjusting component slides backward along the connecting groove, the locking head slides within the reset zone. This ensures that when the lumbar support body is pulled forward, the locking head slides out of the slot and moves within the adjustment zone, preventing deviation and making the gear adjustment process more stable. Simultaneously, when the lumbar support body is adjusted to its foremost position, the locking head can be easily returned to its lowest position via the reset zone, making the gear reset operation more convenient.

[0010] Furthermore, the slot is tilted backward from the side near the adjustment area to the side near the reset area. This allows the locking head to stably engage with the bottom of the slot when the lumbar support is supported by the user's lower back, preventing it from easily disengaging and ensuring good stability. Additionally, as the lumbar support is pulled forward, the locking head slides out along the slope of the slot and smoothly engages with the next slot, making the lumbar support depth adjustment operation simpler and smoother.

[0011] Furthermore, the elastic locking element is a flexible rod, with its front end fixed to the support member and its rear end bent downwards to form a locking head. The top of the support member has a through hole that connects to the connecting groove, through which the locking head passes and inserts into the connecting groove. This improves the connection stability between the locking mechanisms and makes the lumbar support depth adjustment operation more stable.

[0012] Furthermore, the front end of the mounting component is recessed to form a sliding groove extending in a left-right direction. The rear ends of the first and second connecting rods are slidably connected to the mounting component through the sliding groove. A mounting portion protrudes from the middle of the mounting component, dividing the sliding groove into left and right parts. A first elastic element is provided between the side wall of the mounting portion and the first and second connecting rods. The first elastic element acts on the first and second connecting rods, causing them to always have a tendency to slide outwards. This not only ensures that the lumbar support body's locking head can stably engage with the slot during use, preventing it from easily dislodging, thus improving stability, but also allows the locking head to automatically slide along the reset area during the lumbar support body's reset process, meaning the lumbar support body automatically moves backward without requiring manual reset by the user, making the reset operation simpler.

[0013] Furthermore, the front end of the support member is provided with a first hinge, and the rear end of the lumbar support body is provided with a second hinge. The first hinge is hinged to the second hinge, allowing the lumbar support body to rotate up and down relative to the support member. This vertical rotation of the lumbar support body relative to the support member adjusts the tilt, thus conforming to the lumbar region of various users and improving its practicality. Furthermore, a mounting groove is hollowed out on the support member opposite the second hinge. The rear end of the second hinge extends to form a limiting part, which engages with the mounting groove. A second elastic element is provided between the limiting part and the bottom of the mounting groove. Under the elastic force of the second elastic element, the limiting part always has an upward rotation tendency. This gives the lumbar support body the function of adaptively adjusting the tilt of the user's lumbar region, making it not only more convenient to use but also more comfortable.

[0014] Secondly, this application provides a seat, including a backrest support and an adjustable-depth lumbar support. The backrest support includes a lumbar support connecting portion extending forward from the center. A mounting portion is provided in the center of the mounting component. The mounting portion and the lumbar support connecting portion are detachably connected by screws. A cover groove is formed in the rear recess of the lumbar support connecting portion. The screw passes through the bottom of the cover groove and is screwed to the mounting portion. A baffle is also provided on the lumbar support connecting portion, which is configured to cover the cover groove. This makes the installation and disassembly of the backrest support and the lumbar support more convenient, and the connection marks between the lumbar support connecting portion and the mounting portion are located in the cover groove and covered by the baffle, and will not be exposed, thereby giving the seat a better overall appearance and aesthetics.

[0015] The adjustable-depth lumbar support and seat provided in this application utilize a linkage assembly that unfolds forward or folds backward, pushing the support member relative to the mounting member to move back and forth. This allows the lumbar support body to slide back and forth to adjust its depth, adapting to the needs of various users and offering good practicality. The linkage assembly achieves unfolding or folding through the relative rotation of two intersecting and hinged first and second links, resulting in a simple structure and convenient manufacturing. Furthermore, the front and rear ends of the linkage assembly are slidably connected to the support member and the mounting member, respectively. This allows the first and second links to slide relative to the support member and the mounting member when the linkage assembly is unfolded or folded, maintaining the support member in a parallel position to the mounting member. The support member is then pushed forward or pulled backward horizontally by the linkage assembly, resulting in good stability during the lumbar support depth adjustment. Moreover, the overall structure of the depth adjustment device is compact. When the linkage assembly is folded backward, the depth adjustment device is compact and occupies little space, allowing it to be hidden between the lumbar support body and the backrest support, making it less likely to be exposed and resulting in a lighter and more aesthetically pleasing appearance for the seat. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A three-dimensional structural diagram of an adjustable-depth lumbar support provided in an embodiment of this application; Figure 2 A schematic diagram of the connection structure between the lumbar support body and the depth adjustment device provided in an embodiment of this application; Figure 3 This is a schematic diagram of the connection structure between the depth adjustment devices provided in the embodiments of this application; Figure 4 This is a schematic diagram of the connection structure between the linkage assembly and the mounting component provided in an embodiment of this application; Figure 5 A schematic diagram illustrating the state changes of the depth adjustment device when the lumbar support body is located at the rearmost end, as provided in this embodiment of the application. Figure 6 A schematic diagram illustrating the state change of the depth adjustment device when the lumbar support body is adjusted forward, as provided in the embodiments of this application. Figure 7 A schematic diagram illustrating the state changes of the depth adjustment device when the lumbar support body is at its foremost position, as provided in this embodiment of the application. Figure 8 A schematic diagram of the connection structure between the support member and the lumbar support body provided in an embodiment of this application; Figure 9 A cross-sectional structural diagram of the lumbar support body and the support member in the initial state provided in an embodiment of this application; Figure 10 A schematic cross-sectional view of the lumbar support body and the support member after the lumbar support body is rotated according to an embodiment of this application. Figure 11 A three-dimensional structural diagram of the seat provided in the embodiments of this application; Figure 12 This is a schematic diagram of the connection structure between the back support and the lumbar support provided in an embodiment of this application.

[0017] The reference numerals in the attached drawings are as follows: 1-lumbar support body, 110-second hinge, 111-limiting part, 120-second elastic element, 2-support member, 201-first limiting groove, 210-connecting groove, 220-through hole, 221-positioning groove, 230-first hinge, 240-mounting groove, 3-mounting member, 310-sliding groove, 311-second limiting groove, 320-mounting part, 330-first elastic element, 4-the second hinge, 201-second ...250-second limiting groove, 260-second limiting groove, 270-second limiting groove, 280-second limiting groove, 290-second limiting groove, 201-second limiting groove, 202-second limiting groove, 201-second limiting groove, 210-connecting groove, 220-connecting groove, 221-second limiting groove, 230-second limiting groove, 240-second limiting groove, 250-second limiting groove, 260-second limiting groove, 270-second limiting groove, 280-second limiting groove, 290-second limiting groove, 201-second limiting groove, 202-second limiting groove, 202-second limiting groove, 202-second limiting groove, 1-Linkage, 401-Shaft, 410-First clearance opening, 5-Second linkage, 510-Second clearance opening, 6-Adjusting component, 610-Gear position part, 611-Slot, 620-Gear position groove, 621-Adjustment area, 622-Reset area, 7-Elastic locking component, 710-Clip head, 8-Back support, 810-Lumbar support connecting part, 811-Covering groove, 820-Baffle, 9-Massage lumbar support, 10-Elastic lumbar support. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0019] Please refer to the attached document. Figure 1-12This application provides an adjustable-depth lumbar support, including a lumbar support body 1 and a depth adjustment device. The depth adjustment device includes a linkage assembly, a support member 2, and a mounting member 3. The support member 2 is connected to the rear end of the lumbar support body 1, and the mounting member 3 is configured to connect to a back support 8. The linkage assembly includes a first linkage 4 and a second linkage 5. The middle parts of the first linkage 4 and the second linkage 5 intersect and are hinged together. The front ends of the first linkage 4 and the second linkage 5 are slidably connected to the support member 2, and the rear ends of the first linkage 4 and the second linkage 5 are slidably connected to the mounting member 3. When the first linkage 4 rotates relative to the second linkage 5, the linkage assembly unfolds forward or folds backward as a whole, and the support member 2 slides back and forth relative to the mounting member 3, thereby causing the lumbar support body 1 to slide back and forth relative to the back support 8. A locking mechanism is provided between the linkage assembly and the support member 2 or the mounting member 3. The locking mechanism is configured to suspend the lumbar support body 1 at the current depth position.

[0020] In this embodiment, the linkage assembly unfolds forward or folds backward, pushing the support member 2 to move back and forth relative to the mounting member 3. This allows the lumbar support body 1 to slide back and forth to adjust its depth, adapting to the needs of various users and offering good practicality. The linkage assembly unfolds or folds through the relative rotation of two intersecting and hinged first and second linkages 4 and 5, resulting in a simple structure and convenient manufacturing. Furthermore, the front and rear ends of the linkage assembly are slidably connected to the support member 2 and the mounting member 3, respectively. When the linkage assembly unfolds or folds, the first and second linkages 4 and 5 slide relative to the support member 2 and the mounting member 3, ensuring that the support member 2 remains parallel to the mounting member 3. The support member 2 is then pushed forward or pulled backward in the horizontal direction by the linkage assembly, resulting in good stability of the lumbar support body 1's depth adjustment operation. Moreover, the overall structure of the depth adjustment device is compact. When the linkage assembly is folded backward, the depth adjustment device is compact and occupies little space, allowing it to be hidden between the lumbar support body 1 and the backrest support 8, making it less likely to be exposed. This makes the seat more lightweight and aesthetically pleasing.

[0021] Preferably, the support member 2 has a first limiting groove 201 vertically hollowed out on both its left and right sides. The front ends of the first connecting rod 4 and the second connecting rod 5 are respectively hinged to the first limiting groove 201 on the left and right sides by pins, and the front ends of the first connecting rod 4 and the second connecting rod 5 slide left and right relative to the support member 2 through the first limiting groove 201. The front end of the mounting member 3 is recessed to form a sliding groove 310 extending in the left and right direction. The groove walls on both the left and right sides of the sliding groove 310 are hollowed out to form a second limiting groove 311. The rear ends of the first connecting rod 4 and the second connecting rod 5 are respectively hinged to the second limiting groove 311 on the left and right sides by pins, and the rear ends of the first connecting rod 4 and the second connecting rod 5 slide left and right relative to the mounting member 3 through the second limiting groove 311.

[0022] Please refer to the attached document. Figure 2-3In some embodiments of this application, the first link 4 and the second link 5 are hinged together by a pivot 401. The support member 2 is provided with a connecting groove 210 with a front-to-back orientation. The locking mechanism includes an adjusting member 6. The rear end of the adjusting member 6 is hinged to the pivot 401, and the front end of the adjusting member 6 is slidably connected to the support member 2 through the connecting groove 210. When the link assembly is unfolded forward or folded backward, the adjusting member 6 slides back and forth along the connecting groove 210.

[0023] In this embodiment, by directly hinged the adjusting member 6 to the first connecting rod 4 and the second connecting rod 5, when the connecting rod assembly is unfolded forward or folded backward, the adjusting member 6 is driven by the rotating shaft 401 to move back and forth in the horizontal direction, and the front end of the adjusting member 6 is slidably connected to the support member 2 through the connecting groove 210, thereby making the depth adjustment operation of the lumbar support more stable.

[0024] Preferably, the first connecting rod 4 has a first clearance opening 410 in its middle, the second connecting rod 5 passes through the first clearance opening 410 and intersects with the first connecting rod 4, the second connecting rod 5 has a second clearance opening 510 in its middle, and the rear end of the adjusting member 6 passes through the second clearance opening 510 and is hinged together with the first connecting rod 4 and the second connecting rod 5. Thus, the first connecting rod 4, the second connecting rod 5, and the adjusting member 6 are stacked together in an alternating manner, resulting in not only high connection strength but also a more compact structure for the depth adjustment device.

[0025] Please refer to the attached document. Figure 3 In some embodiments of this application, the adjusting member 6 is provided with a gear position 610, and a plurality of slots 611 arranged in a front-back direction are provided on one side of the gear position 610. The locking mechanism also includes an elastic locking member 7, one end of which is connected to the support member 2, and the other end is provided with a locking head 710 that engages with the slots 611. The elastic locking member 7 applies a spring force to the locking head 710 to engage in the direction of the slots 611. When the adjusting member 6 slides back and forth along the connecting groove 210, the locking head 710 engages with the plurality of slots 611 in sequence under the spring force of the elastic locking member 7.

[0026] In this embodiment, when the user sits down, the locking head 710 on the elastic locking member 7 engages with the locking groove 611 on the positioning part 610, fixing the lumbar support body 1 at the current depth and providing stable support for the user. When the lumbar support body 1 needs to be adjusted, as the adjusting member 6 slides back and forth along the connecting groove 210, the elastic locking member 7 moves relative to the adjusting member 6, and the locking head 710 abuts against the locking groove 611, thereby forcing the elastic locking member 7 to undergo elastic deformation until the locking head 710 slides into the previous or next locking groove 611 along the opening direction of the locking groove 611 to achieve the adjustment of the lumbar support body 1. This provides a tactile feedback during the lumbar support depth adjustment operation, further improving the stability of the adjustment operation.

[0027] Preferably, the shift section 610 is provided with three slots 611, and the lumbar support body 1 has at least three adjustable depth settings, providing a high degree of freedom. Of course, in other embodiments of this application, the number of slots 611 can also be two, four, five, etc.

[0028] Please refer to the attached document. Figure 5-7 In some embodiments of this application, the top of the adjusting member 6 is recessed and a gear groove 620 is provided. A gear part 610 is disposed in the gear groove 620, and an annular gap is formed between the gear part 610 and the groove wall of the gear groove 620. The gap between the side of the gear part 610 with the slot 611 and the groove wall of the gear groove 620 forms an adjusting area 621. The gap between the side of the gear part 610 with the slot 611 and the groove wall of the gear groove 620 forms a reset area 622. When the adjusting member 6 slides forward along the connecting groove 210, the locking head 710 slides in the adjusting area 621. When the adjusting member 6 slides backward along the connecting groove 210, the locking head 710 slides in the reset area 622.

[0029] In this embodiment, by setting the gear slot 620, when the lumbar support body 1 is pulled forward, the locking head 710 switches between adjacent locking slots 611. After the locking head 710 slides out of the locking slot 611, it moves within the adjustment area 621, which is less likely to cause deviation and makes the gear adjustment process more stable. At the same time, when the lumbar support body 1 is adjusted to the frontmost position, the locking head 710 can be easily returned to the lowest position through the reset area 622, making the gear reset operation more convenient.

[0030] Please refer to the attached document. Figure 5-7 In some embodiments of this application, the slot 611 is tilted backward from the side near the adjustment area 621 to the side near the reset area 622.

[0031] In this embodiment, by tilting the slot 611, when the lumbar support body 1 is supported by the user's waist, the locking head 710 can be stably locked in the bottom of the slot 611 along the tilt direction of the slot 611, making it less likely to fall out and providing good stability. Furthermore, during the process of pulling the lumbar support body 1 forward, the locking head 710 can slide out along the slope of the slot 611 and smoothly lock into the next slot 611, thereby making the depth adjustment operation of the lumbar support simpler and smoother.

[0032] Please refer to the attached document. Figure 3 In some embodiments of this application, the elastic clip 7 is an elastic rod. The front end of the elastic clip 7 is fixed to the support member 2, and the rear end is bent downward to form a clip head 710. The top of the support member 2 is hollowed out with a through hole 220, which connects to the connecting groove 210. The clip head 710 passes through the through hole 220 and enters the connecting groove 210.

[0033] In this embodiment, the elastic locking member 7 is a steel rod that has undergone bending processing, which is not only easy to process but also has high strength and good elastic deformation capability. Furthermore, the locking head 710 passes through the through hole 220 into the connecting groove 210 and connects with the adjusting member 6 in the connecting groove 210 to perform gear adjustment operation, thereby making the connection stability between the locking mechanisms better and the lumbar support depth adjustment operation more stable.

[0034] Preferably, the top of the support member 2 is recessed downward to form a positioning groove 221, which is connected to the through hole 220. The elastic clip 7 is engaged in the positioning groove 221, and when the rear side of the elastic clip 7 undergoes elastic deformation, it swings left and right in the positioning groove 221, so that the connection strength between the elastic clip 7 and the support member 2 is higher and the stability is better.

[0035] Please refer to the attached document. Figure 4 In some embodiments of this application, the front end of the mounting member 3 is recessed to form a sliding groove 310 extending in the left-right direction. The rear ends of the first connecting rod 4 and the second connecting rod 5 are slidably connected to the mounting member 3 through the sliding groove 310. The middle part of the mounting member 3 protrudes to form a mounting portion 320, which divides the sliding groove 310 into left and right parts. A first elastic member 330 is provided between the side wall of the mounting portion 320 and the first connecting rod 4 and the second connecting rod 5. The first elastic member 330 acts on the first connecting rod 4 and the second connecting rod 5, so that the first connecting rod 4 and the second connecting rod 5 always have the tendency to slide outward.

[0036] In this embodiment, by setting the first elastic element 330, the first connecting rod 4 and the second connecting rod 5 always have an outward sliding tendency, that is, the connecting rod assembly has a backward folding tendency, and the adjusting element 6 also has a forward sliding tendency relative to the supporting element 2. This not only makes the locking head 710 stably locked into the locking slot 611 during use and less likely to fall out, thus improving stability; it also allows the locking head 710 to automatically slide along the reset area 622 during the reset process of the lumbar support body 1, that is, the lumbar support body 1 automatically moves backward without requiring manual reset by the user, making the reset operation simpler.

[0037] Please refer to the attached document. Figure 2 and attached Figure 8 In some embodiments of this application, the front end of the support member 2 is provided with a first hinge portion 230, and the rear end of the lumbar support body 1 is provided with a second hinge portion 110. The first hinge portion 230 is hinged to the second hinge portion 110, so that the lumbar support body 1 can rotate up and down relative to the support member 2.

[0038] In this embodiment, the lumbar curvature of different users will vary, which means that if the tilt of the lumbar support body 1 cannot be adjusted, it will not be suitable for different users. Therefore, by hinged to the support member 2, the lumbar support body 1 can rotate up and down relative to the support member 2 to adjust its tilt, thereby conforming to the lumbar shape of various users and improving its practicality. Please refer to the attached document. Figure 8-10 In some embodiments of this application, a mounting groove 240 is provided on the support member 2 at the part opposite to the second hinge portion 110. The rear end of the second hinge portion 110 extends to form a limiting portion 111. The limiting portion 111 is inserted into the mounting groove 240. A second elastic member 120 is provided between the limiting portion 111 and the bottom of the mounting groove 240. Under the elastic force of the second elastic member 120, the limiting portion 111 always has an upward rotation tendency.

[0039] In this embodiment, the limiting part 111 on the first hinge 110 rotates within the mounting groove 240 of the support member 2, which not only increases the connection strength between the lumbar support body 1 and the support member 2, but also allows the lumbar support body 1 to automatically rotate to an angle that fits the user's waist when the user leans against it. The second elastic member 120 is compressed by the limiting part 111 to generate elastic deformation and applies a restoring force to the limiting part 111, thereby enabling the lumbar support body 1 to provide a high degree of elastic support for the user's waist with the help of the elastic force of the second elastic member 120. When the user leaves the seat, the limiting part 111 is pushed against the upper groove wall of the mounting groove 240 by the restoring force of the second elastic member 120, and the lumbar support body 1 returns to its initial state. Thus, the lumbar support body 1 has the function of adaptively adjusting the tilt angle of the user's waist, making it not only more convenient to use but also more comfortable.

[0040] Preferably, the lumbar support body 1 has two symmetrical second hinge parts 110 on its rear side, and the support member 2 also has two first hinge parts 230 and two hollowed-out mounting grooves 240, thereby further improving the connection strength between the lumbar support body 1 and the support member 2 and improving stability.

[0041] Please refer to the attached document. Figure 11-12 This application embodiment also provides a seat, including a back support 8 and an adjustable lumbar support. The back support 8 includes a lumbar support connecting part 810 extending forward from the middle. A mounting part 320 is provided in the middle of the mounting member 3. The mounting part 320 and the lumbar support connecting part 810 are detachably connected by screws. A covering groove 811 is formed in the rear side of the lumbar support connecting part 810. The screw passes through the bottom of the covering groove 811 and is screwed to the mounting part 320. A baffle 820 is also provided on the lumbar support connecting part 810. The baffle 820 is configured to cover the covering groove 811.

[0042] In this embodiment, the lumbar support connecting part 810 and the mounting part 320 are connected by screws, which makes the installation and disassembly of the back support 8 and the lumbar support more convenient. Furthermore, the connection marks between the lumbar support connecting part 810 and the mounting part 320 are located in the covering groove 811 and are covered by the baffle 820, so they will not be exposed, thereby giving the seat a better overall appearance and aesthetics.

[0043] Preferably, the back support 8 can connect to other lumbar supports with different structures and functions, in addition to connecting to the adjustable-depth lumbar support, such as the massage lumbar support 9 with massage function, and the elastic lumbar support 10 with simple structure and high elasticity. The rear ends of the massage lumbar support 9 and the elastic lumbar support 10 are provided with mounting parts 320, so that users can choose to connect one of the multiple lumbar supports according to their own usage needs, which makes it more practical.

[0044] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0045] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An adjustable depth lumbar support, characterized by, The device includes a lumbar support body (1) and a depth adjustment device. The depth adjustment device includes a linkage assembly, a support member (2), and a mounting member (3). The support member (2) is connected to the rear end of the lumbar support body (1). The mounting member (3) is configured to connect to a back support bracket (8). The linkage assembly includes a first link (4) and a second link (5). The middle parts of the first link (4) and the second link (5) intersect and are hinged together. The front ends of the first link (4) and the second link (5) are slidably connected to the support member (2). The rear ends of the rod (4) and the second connecting rod (5) are slidably connected to the mounting member (3), so that when the first connecting rod (4) rotates relative to the second connecting rod (5), the connecting rod assembly unfolds forward or folds backward as a whole, and the support member (2) slides back and forth relative to the mounting member (3), thereby driving the lumbar support body (1) to slide back and forth relative to the back support (8); a locking mechanism is provided between the connecting rod assembly and the support member (2) or the mounting member (3), and the locking mechanism is configured to make the lumbar support body (1) hover at the current depth position.

2. The adjustable depth lumbar support of Claim 1, wherein, The first link (4) and the second link (5) are hinged together by a pivot (401). The support member (2) has a connecting groove (210) with a hollowed-out front and back orientation. The locking mechanism includes an adjusting member (6). The rear end of the adjusting member (6) is hinged to the pivot (401). The front end of the adjusting member (6) is slidably connected to the support member (2) through the connecting groove (210). When the link assembly is unfolded forward or folded backward, the adjusting member (6) slides back and forth along the connecting groove (210).

3. The adjustable depth lumbar support of Claim 2, wherein, The adjusting member (6) is provided with a gear position (610), and a plurality of slots (611) arranged in a front-back direction are provided on one side of the gear position (610). The locking mechanism also includes an elastic locking member (7). One end of the elastic locking member (7) is connected to the support member (2), and the other end is provided with a locking head (710) that engages with the slot (611). The elastic locking member (7) applies a spring force to the locking head (710) to engage in the direction of the slot (611). When the adjusting member (6) slides back and forth along the connecting groove (210), the locking head (710) engages with the plurality of slots (611) in sequence under the action of the elastic force of the elastic locking member (7).

4. The adjustable depth lumbar support of Claim 3, wherein, The top of the adjusting member (6) is recessed and provided with a gear slot (620). The gear part (610) is disposed in the gear slot (620), and an annular gap is formed between the gear part (610) and the groove wall of the gear slot (620). The gap between the side of the gear part (610) with the slot (611) and the groove wall of the gear slot (620) forms an adjusting area (621). The gap between the back side of the gear part (610) with the slot (611) and the groove wall of the gear slot (620) forms a reset area (622). When the adjusting member (6) slides forward along the connecting groove (210), the locking head (710) slides in the adjusting area (621). When the adjusting member (6) slides backward along the connecting groove (210), the locking head (710) slides in the reset area (622).

5. The adjustable depth lumbar support of Claim 4, wherein, The slot (611) is tilted backward from the side near the adjustment area (621) to the side near the reset area (622).

6. The adjustable depth lumbar support of Claim 4, wherein, The elastic clip (7) is an elastic rod. The front end of the elastic clip (7) is fixed to the support (2), and the rear end is bent downward to form the clip head (710). The top of the support (2) is hollowed out with a through hole (220). The through hole (220) is connected to the connecting groove (210). The clip head (710) passes through the through hole (220) and enters the connecting groove (210).

7. The adjustable depth lumbar support of Claim 1, wherein, The front end of the mounting component (3) is recessed to form a sliding groove (310) extending in the left-right direction. The rear ends of the first connecting rod (4) and the second connecting rod (5) are slidably connected to the mounting component (3) through the sliding groove (310). The middle part of the mounting component (3) protrudes to form a mounting part (320). The mounting part (320) divides the sliding groove (310) into two parts, and a first elastic member (330) is provided between the side wall of the mounting part (320) and the first connecting rod (4) and the second connecting rod (5). The first elastic member (330) acts on the first connecting rod (4) and the second connecting rod (5) so that the first connecting rod (4) and the second connecting rod (5) always have the tendency to slide outward.

8. The adjustable depth lumbar support of Claim 1, wherein, The front end of the support member (2) is provided with a first hinge part (230), and the rear end of the lumbar support body (1) is provided with a second hinge part (110). The first hinge part (230) is hinged to the second hinge part (110), so that the lumbar support body (1) can rotate up and down relative to the support member (2).

9. The adjustable depth lumbar support of claim 8, wherein, The support member (2) has a hollowed-out mounting groove (240) on the part opposite to the second hinge part (110). The rear end of the second hinge part (110) extends to form a limiting part (111). The limiting part (111) is inserted into the mounting groove (240). A second elastic member (120) is provided between the limiting part (111) and the bottom of the mounting groove (240). The limiting part (111) always has an upward rotation tendency under the elastic force of the second elastic member (120).

10. A seat, characterized by The device includes a back support (8) and an adjustable-depth lumbar support as described in any one of claims 1-9. The back support (8) includes a lumbar support connecting part (810) extending forward from the center. The mounting part (3) is provided with a mounting part (320) in the center. The mounting part (320) and the lumbar support connecting part (810) are detachably connected by screws. A cover groove (811) is formed in the rear side of the lumbar support connecting part (810). A screw passes through the bottom of the cover groove (811) and is screwed to the mounting part (320). A baffle (820) is also provided on the lumbar support connecting part (810). The baffle (820) is configured to cover the cover groove (811).

Images