Installation-friendly lumbar support device and seat

Abstract

The application discloses a waist rest device and a seat facilitating installation, which comprises a waist rest body and a mounting seat. The waist rest body has elastic deformation capacity. The mounting seat is detachably connected to the left and right sides of the waist rest body. The mounting seat is an integrally formed structure. The waist rest body and the mounting seat are detachably connected through a quick mounting structure. The quick mounting structure comprises a barb and a socket. The barb is arranged on one of the waist rest body and the mounting seat. The socket is arranged on the other one of the waist rest body and the mounting seat. When the barb is connected to the socket, the waist rest body and the mounting seat are relatively fixed in the front and back directions. The waist rest device and the seat facilitating installation have the advantages that the waist rest body and the mounting seat are connected and fixed through the barb and the socket, the connection strength is good, the mounting and dismounting operation between the waist rest body and the mounting seat is simple and convenient, and the mounting seat is an integrally formed structure, so that the cost required for the overall processing and manufacturing of the waist rest device is low.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a lumbar support device and a seat that are easy to install. Background Technology

[0002] In the office sector, mesh chairs are a popular choice among consumers. The back frame of a mesh chair has a simple square structure, covered with a layer of elastic and breathable mesh fabric, providing users with a soft and comfortable support experience. Furthermore, to alleviate lower back fatigue, existing mesh chairs also feature a lumbar support plate horizontally mounted on the back frame. This lumbar support plate is located behind the mesh fabric and is made of a relatively stiff material, ensuring that it does not affect the support effect of the mesh fabric on the back while providing strong support for the user's lower back.

[0003] The existing mesh chair has mounting seats on both sides of the lumbar support plate for connecting the back frame and the lumbar support plate. Each mounting seat includes two mounting plates, one at the front and one at the back. The two mounting plates are clamped at the front and one at the back of the lumbar support plate respectively, and the two mounting plates and the lumbar support plate are connected and fixed together by screws. One of the mounting plates is connected and fixed to the back frame.

[0004] While the above solution can securely fix the lumbar support to the back frame, it has the following problems: First, the installation operation between the lumbar support and the mounting base is relatively cumbersome, requiring the lumbar support to be clamped with two mounting plates before screwing in the screws for fixation; second, one of the mounting plates needs to be connected and fixed to the back frame, meaning that the front and rear mounting plates have different structures and require separate mold design and manufacturing, resulting in higher costs for manufacturing the mounting base. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a lumbar support device and seat that are easy to install. The lumbar support body and the mounting base are connected and fixed by means of barbs and snap-fit, which not only provides good connection strength, but also makes the installation and disassembly of the lumbar support body and the mounting base simpler and more convenient. Moreover, only barbs or snaps need to be processed on the mounting base, which is a one-piece molded structure, so the cost of manufacturing the lumbar support device as a whole is low.

[0006] The effect of this utility model is achieved as follows: In a first aspect, this application provides a lumbar support device that is easy to install, including a lumbar support body and a mounting base. The mounting base is configured to connect to the side support of the back frame. The mounting base is an integrally formed structure. The mounting base is detachably connected to both the left and right sides of the lumbar support body. The lumbar support body and the mounting base are detachably connected by a quick-release structure. The quick-release structure includes a barb and a latch. The barb is provided in one of the lumbar support body and the mounting base, and the latch is provided in the other of the lumbar support body and the mounting base. When the barb is engaged with the latch, the lumbar support body and the mounting base are relatively fixed in the front-back orientation.

[0007] Furthermore, the lumbar support body has elastic deformation capability, and the latch is an L-shaped irregular hole, including a narrow locking part and a wide unlocking part. The barb includes a positioning part extending in the front-to-back direction. The width of the locking part is close to that of the positioning part, and the width of the unlocking part is greater than that of the positioning part. The lumbar support device has switchable locked and unlocked states. In the locked state, the positioning part is engaged with the locking part, the barb cannot continue to slide in the left-to-right direction, the lumbar support body and the mounting base are relatively fixed, and the lumbar support body cannot produce elastic deformation when supported. In the unlocked state, the positioning part is engaged with the unlocking part, the barb can slide in the left-to-right direction again, and the lumbar support body produces elastic deformation when supported. The elasticity of the lumbar support body can be adjusted according to the user's needs, effectively improving the practicality of the lumbar support device.

[0008] Furthermore, a positioning structure is provided between the positioning part and the locking part. The positioning structure includes a positioning protrusion and a positioning groove. The positioning protrusion is located in one of the positioning part and the locking part, and the positioning groove is located in the other of the positioning part and the locking part. In the locked state, when the positioning part is engaged with the locking part, the positioning protrusion is engaged with the positioning groove. During use, the lumbar support device is stably fixed in the current state and is not easily switched under the action of external force, thus making the lumbar support device more stable.

[0009] Furthermore, a barb is provided at the front end of the mounting base. The barb includes a positioning part extending in the front-back direction, and the positioning parts on the left and right sides are bent in a direction away from each other to form a limiting part. The left and right sides of the lumbar support body are correspondingly provided with a latch. The outer edge of the latch moves toward the recessed part of the barb, so that the barb can stably abut against the edge of the latch, and the stability of the lumbar support device is better.

[0010] Furthermore, the barb includes a positioning part extending in the front-to-back direction, the end of which is bent in the left-to-right direction to form a limiting part. An elastic part is also provided on the side wall of the bayonet, possessing elastic deformation capability. The elastic part is configured to generate elastic deformation and allow the limiting part to pass through the bayonet. This not only makes the installation of the lumbar support body simpler and smoother, but also further improves the overall stability of the lumbar support device.

[0011] Furthermore, the latch includes a wider unlocking section, with an elastic section located on the side wall of the unlocking section away from the mounting base. This prevents the barb from detaching from the latch during use, further improving the stability of the lumbar support device.

[0012] Furthermore, the mounting base includes a U-shaped curved back frame connector, which engages with the side support portion of the back frame. This fixes the mounting base and the side support portion relatively in the left-right direction, thereby enhancing the connection strength between the mounting base and the side support portion and providing better stability to the lumbar support device.

[0013] Secondly, this application also provides a seat, including a back frame and a back frame device for easy installation. The back frame has a square frame structure and includes two vertical side supports on the left and right sides. The back frame device for easy installation is horizontally disposed between the two side supports and is slidably connected to the side supports in the vertical direction. Users can adjust the lumbar support device to a suitable height according to their own needs, further improving the practicality of the lumbar support device.

[0014] Furthermore, the mounting base includes a sliding part, and a cover plate is detachably connected to the front end face of the side support. A gap is formed between the cover plate and the side support, which is configured as a sliding groove. The sliding part is slidably connected to the side support in the vertical direction through the sliding groove. This further improves the connection strength between the mounting base and the side support, resulting in better stability of the height adjustment operation of the lumbar support device.

[0015] Furthermore, the front end of the sliding part is provided with several limiting protrusions, and the rear end of the cover plate is recessed along the length direction to form multiple limiting grooves. When the cover plate is installed on the side support part, the limiting protrusions and limiting grooves engage, so that the mounting base and the side support part are relatively fixed in the vertical direction. This allows the lumbar support device to be fixed at multiple vertical heights, with a high degree of adjustment freedom, and the lumbar support device has good stability.

[0016] The lumbar support device and seat provided in this application are easily installed. The lumbar support body and the mounting base are connected and fixed by a hook and a snap-fit ​​mechanism. The installation operation between the lumbar support body and the mounting base can be completed simply by aligning the hook with the snap-fit. The connection strength is good. Compared with the existing method of using two mounting plates to clamp and screw the lumbar support body, the installation and disassembly operation between the lumbar support body and the mounting base in this solution is simpler and more convenient. In addition, the hook can slide left and right along the snap-fit, allowing the lumbar support body to move relative to the mounting base and generate a large range of elastic deformation. This allows the lumbar support body to provide softer and more comfortable elastic support for the user's waist, resulting in higher comfort of the lumbar support device. Moreover, only the hook or snap-fit ​​needs to be machined on the mounting base to connect and fix it to the lumbar support body. The mounting base is a one-piece molded structure. No other mechanism is needed between the mounting base and the lumbar support body, which reduces the overall manufacturing cost of the lumbar support device. Attached Figure Description

[0017] 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 This is a three-dimensional structural diagram of the lumbar support device provided in the embodiments of this application; Figure 2 A schematic diagram of the connection structure between the lumbar support body and the mounting base provided in an embodiment of this application; Figure 3 A schematic diagram illustrating the process of the lumbar support device provided in this embodiment switching from a locked state to an unlocked state; Figure 4 A schematic diagram illustrating the change process of the barb as it moves within the unlocking section, as provided in an embodiment of this application; Figure 5 This is a cross-sectional structural diagram of the lumbar support device provided in the embodiments of this application; Figure 6 A three-dimensional structural diagram of the seat when the lumbar support device provided in the embodiment of this application is in the locked state; Figure 7 A three-dimensional structural diagram of the seat when the lumbar support device provided in the embodiment of this application is in the unlocked state; Figure 8 This is a schematic diagram of the connection structure between the cover plate and the side support provided in an embodiment of this application; Figure 9 This is a cross-sectional structural diagram of the side support provided in an embodiment of this application.

[0018] The reference numerals in the attached drawings are as follows: 1-waist support body, 110-bayonet, 111-locking part, 112-unlocking part, 113-positioning groove, 114-elastic part, 2-mounting base, 210-barb, 211-positioning part, 212-limiting part, 213-positioning protrusion, 220-back frame connecting part, 230-sliding part, 231-limiting protrusion, 3-back frame, 310-side support part, 311-sliding groove, 320-cover plate, 321-limiting groove. Detailed Implementation

[0019] 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.

[0020] Please refer to the attached document. Figure 1-9This application provides an easy-to-install lumbar support device, including a lumbar support body 1 and a mounting base 2. The mounting base 2 is configured to be connected to the side support portion 310 of the back frame 3. The mounting base 2 is an integrally formed structure. The mounting base 2 is detachably connected to both the left and right sides of the lumbar support body 1. The lumbar support body 1 and the mounting base 2 are detachably connected by a quick-release structure. The quick-release structure includes a barb 210 and a latch 110. The barb 210 is provided in one of the lumbar support body 1 and the mounting base 2, and the latch 110 is provided in the other of the lumbar support body 1 and the mounting base 2. When the barb 210 is engaged with the latch 110, the lumbar support body 1 and the mounting base 2 are relatively fixed in the front-back direction. The barb 210 can slide left and right along the latch 110, so that when the lumbar support body 1 is supported by a force, the lumbar support body 1 moves relative to the mounting base 2, and the lumbar support body 1 as a whole undergoes elastic deformation backward.

[0021] In this embodiment, the lumbar support body 1 and the mounting base 2 are connected and fixed by a hook 210 and a latch 110. The installation operation between the lumbar support body 1 and the mounting base 2 can be completed simply by aligning the hook 210 with the latch 110 and engaging it. The connection strength is good, and compared with the existing method of using two mounting plates to clamp and screw the lumbar support body 1, the installation and disassembly operation between the lumbar support body 1 and the mounting base 2 is simpler and more convenient. Furthermore, the hook 210 can slide left and right along the latch 110, allowing the lumbar support body 1 to move relative to the mounting base 2 and generate a large range of elastic deformation. This allows the lumbar support body 1 to provide softer and more comfortable elastic support for the user's waist, resulting in higher comfort of the lumbar support device. Moreover, only the hook 210 or the latch 110 needs to be machined on the mounting base 2 to connect and fix it to the lumbar support body 1. The mounting base 2 is a one-piece molded structure, and no other mechanism is needed between the mounting base 2 and the lumbar support body 1, which reduces the overall manufacturing cost of the lumbar support device.

[0022] Please refer to the attached document. Figure 2-3 In some embodiments of this application, the lumbar support body 1 has elastic deformation capability, the latch 110 is an L-shaped irregular hole, including a narrow locking part 111 and a wide unlocking part 112, the barb 210 includes a positioning part 211 extending in the front-back direction, the width of the locking part 111 is close to that of the positioning part 211, and the width of the unlocking part 112 is greater than that of the positioning part 211; the lumbar support device has a switchable locked state and an unlocked state. In the locked state, the positioning part 211 is engaged with the locking part 111, the barb 210 cannot continue to slide in the left-right direction, the lumbar support body 1 and the mounting base 2 are relatively fixed, and the lumbar support body 1 cannot produce elastic deformation after being supported; in the unlocked state, the positioning part 211 is engaged with the unlocking part 112, the barb 210 can slide in the left-right direction again, and the lumbar support body 1 produces elastic deformation after being supported.

[0023] In this embodiment, depending on the usage environment and the user's individual needs, the user's requirements for the softness of the lumbar support body 1 will vary. For example, when working at a desk, the user hopes that the lumbar support body 1 can provide stronger support for the lower back to avoid problems such as lumbar muscle strain or scoliosis caused by prolonged sitting; while when resting on their back, the user hopes that the lumbar support body 1 is softer, effectively relieving fatigue with flexible support. Therefore, by setting the latch 110 as an L-shaped groove, in the locked state, the positioning part 211 engages with the locking part 111, and the lumbar support body 1 cannot undergo elastic deformation, thereby providing more stable support for the user's lower back; in the unlocked state, the positioning part 211 engages with the unlocking part 112, and the lumbar support body 1 can re-generate elastic deformation, thereby providing more flexible support for the user's lower back. The elasticity of the lumbar support body 1 can be adjusted according to the user's needs, effectively improving the practicality of the lumbar support device.

[0024] Please refer to the attached document. Figure 3 In some embodiments of this application, a positioning structure is provided between the positioning part 211 and the locking part 111. The positioning structure includes a positioning protrusion 213 and a positioning groove 113. The positioning protrusion 213 is disposed in one of the positioning part 211 and the locking part 111, and the positioning groove 113 is disposed in the other of the positioning part 211 and the locking part 111. In the locked state, when the positioning part 211 is engaged with the locking part 111, the positioning protrusion 213 is engaged with the positioning groove 113.

[0025] In this embodiment, by providing a positioning structure between the positioning part 211 and the locking part 111, the positioning part 211 can stably engage with the locking part 111 in the locked state, and the positioning part 211 is not easy to slip out of the locking part 111 and slide into the unlocking part 112. That is, during use, the lumbar support device is stably fixed in the current state and is not easy to switch states under the action of external force, thereby making the stability of the lumbar support device better.

[0026] Preferably, a positioning protrusion 213 is provided on the side wall of the positioning part 211, and a corresponding positioning groove 113 is formed in the side wall of the locking part 111. Both the positioning protrusion 213 and the positioning groove 113 are arc-shaped structures, so that when the user needs to switch states, he / she can press the positioning protrusion 213 to disengage from the positioning groove 113 by applying appropriate force, making the state switching operation of the lumbar support device more convenient.

[0027] Please refer to the attached document. Figure 2 In some embodiments of this application, the barb 210 is disposed at the front end of the mounting base 2. The barb 210 includes a positioning part 211 extending in the front-back direction, and the positioning parts 211 on the left and right sides are bent in a direction away from each other to form a limiting part 212. The waist rest body 1 has corresponding slots 110 on the left and right sides.

[0028] In this embodiment, the barb 210 is disposed at the front end of the mounting base 2, and the limiting portions 212 on both sides are disposed outward, so that when the lumbar support body 1 undergoes elastic deformation backward, the outer edge of the latch 110 moves toward the recessed part of the barb 210, thereby enabling the barb 210 to stably abut against the edge of the latch 110, thus improving the stability of the lumbar support device.

[0029] Of course, in other embodiments of this application, the barb 210 can also be set at the rear end of the waist support body 1, and the mounting base 2 is hollowed out to form a bayonet 110, and the positioning part 211 on both sides of the barb 210 is bent in the direction of mutual approach to form a limiting part 212.

[0030] Please refer to the attached document. Figure 2 and attached Figure 4 In some embodiments of this application, the barb 210 includes a positioning part 211 extending in the front-back direction, the end of the positioning part 211 is bent in the left-right direction to form a limiting part 212, and an elastic part 114 is also provided on the side wall of the bayonet 110. The elastic part 114 has elastic deformation capability and is configured to generate elastic deformation and allow the limiting part 212 to pass through the bayonet 110.

[0031] In this embodiment, the width of the latch 110 is relatively large. To ensure that the barb 210 can smoothly engage with the latch 110 and that the barb 210 is not easily disengaged after engaging, an elastic part 114 with elastic deformation capability is provided on the side wall of the latch 110. When the wider limiting part 212 engages with the latch 110, the width of the unlocking part 112 is smaller. The limiting part 212 compresses the elastic part 114 and forces the elastic part 114 to undergo elastic deformation, thereby widening the width of the limiting part 212 so that the limiting part 212 can smoothly pass through the latch 110. Furthermore, after the limiting part 212 passes through the latch 110, the elastic part 114 returns to its original position, and the width of the unlocking part 112 becomes smaller again. The wider limiting part 212 is constrained by the unlocking part 112 and is not easily disengaged from the unlocking part 112. Therefore, not only is the installation operation of the lumbar support body 1 simpler and smoother, but the overall stability of the lumbar support device is further improved.

[0032] Please refer to the attached document. Figure 4 In some embodiments of this application, the bayonet 110 includes a wider unlocking portion 112, and an elastic portion 114 is disposed on the side wall of the unlocking portion 112 away from the mounting base 2.

[0033] In this embodiment, when the lumbar support body 1 is subjected to external force, causing the barb 210 to tend to disengage from the latch 110, the limiting part 212 abuts against the edge of the latch 110. By providing the elastic part 114 on the side wall of the unlocking part 112 away from the mounting base, the elastic part 114 is moved away from the limiting part 212, thereby preventing the limiting part 212 from squeezing the elastic part 114 and causing it to deform, thus preventing the barb 210 from disengaging from the latch 110. This prevents the barb 210 from disengaging from the latch 110 during use, further improving the stability of the lumbar support device.

[0034] Please refer to the attached document. Figure 5 In some embodiments of this application, the mounting base 2 includes a U-shaped curved back frame connecting portion 220, which is configured to engage with the side support portion 310 of the back frame 3.

[0035] In this embodiment, when the lumbar support body 1 is compressed and tends to elastically deform, the mounting base 2, driven by the lumbar support body 1, also tends to move left and right relative to the side support portion 310. Therefore, by setting a U-shaped back frame connecting portion 220 and the side support portion 310 for a snap-fit ​​engagement, the mounting base 2 and the side support portion 310 are relatively fixed in the left and right directions, thereby enhancing the connection strength between the mounting base 2 and the side support portion 310 and giving the lumbar support device better stability.

[0036] Please refer to the attached document. Figure 6-7 This application embodiment also provides a seat, including a back frame 3 and a back frame device for easy installation. The back frame 3 is a square frame structure. The back frame 3 includes two vertical side support parts 310 on the left and right. The back frame device for easy installation is arranged horizontally between the two side support parts 310, and the back frame device for easy installation is slidably connected to the side support parts 310 in the vertical direction.

[0037] In this embodiment, the height of the lower back from the seat varies for users of different body types, and a fixed-position lumbar support cannot meet the needs of users of all body types. An easy-to-install lumbar support device is horizontally mounted between the side support portions 310 and can slide and adjust along the side support portions 310. Users can adjust the lumbar support device to a suitable height according to their own needs, further improving the practicality of the lumbar support device.

[0038] Please refer to the attached document. Figure 8-9 In some embodiments of this application, the mounting base 2 includes a sliding portion 230, and a cover plate 320 is detachably connected to the front end face of the side support portion 310. A gap is formed between the cover plate 320 and the side support portion 310, and the gap is configured as a groove 311. The sliding portion 230 is slidably connected to the side support portion 310 in the vertical direction through the groove 311.

[0039] In this embodiment, the sliding part 230 is clamped to the side support part 310 by the detachable cover plate 320, so that the mounting base 2 is also relatively fixed to the side support part 310 in the front-back direction. With the U-shaped side support part 310 and the side support part 310 being snapped together, the mounting base 2 can only slide along the length direction of the side support part 310, thereby further improving the connection strength between the mounting base 2 and the side support part 310, and making the height adjustment operation of the lumbar support device more stable.

[0040] Preferably, the cover plate 320 and the side support 310 are fixed by screws, which makes the installation and disassembly of the cover plate 320 more convenient and the connection strength between the cover plate 320 and the side support 310 higher.

[0041] Please refer to the attached document. Figure 8-9 In some embodiments of this application, the front end of the sliding part 230 is provided with a plurality of limiting protrusions 231, and the rear end of the cover plate 320 is recessed along the length direction to form a plurality of limiting grooves 321. When the cover plate 320 is installed on the side support part 310, the limiting protrusions 231 and the limiting grooves 321 engage and cooperate, so that the mounting base 2 and the side support part 310 are relatively fixed in the vertical direction.

[0042] In this embodiment, the sliding part 230 and the cover plate 320 are engaged by the limiting protrusion 231 and the limiting groove 321, so that the lumbar support device can be fixed at multiple vertical heights, with a high degree of adjustment freedom. Under the influence of external force, the limiting protrusion 231 is not easy to detach from the limiting groove 321, so that the lumbar support device has good stability.

[0043] Preferably, both the limiting protrusion 231 and the limiting groove 321 are arc-shaped structures. This means that when adjusting the height of the lumbar support device, it is not necessary to disassemble the cover plate 320. Simply apply a significant force to the lumbar support device to push the limiting protrusion 231 out of the current limiting groove 321, thus adjusting the lumbar support device to a suitable height, making operation simpler. Furthermore, the front end of the sliding part 230 has three limiting protrusions 231, which increases the connection strength between the sliding part 230 and the cover plate 320, preventing easy slippage under external force. The rear end of the cover plate 320 is recessed to form forty-five limiting grooves 321, providing a wide range of adjustable positions and allowing for a high degree of freedom in adjusting the height of the lumbar support device.

[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. A lumbar support device that is easy to install, characterized in that, The lumbar support body (1) and the mounting base (2) are included. The mounting base (2) is configured to be connected to the side support part (310) of the back frame (3). The mounting base (2) is an integrally formed structure. The mounting base (2) can be detachably connected to both the left and right sides of the lumbar support body (1). The lumbar support body (1) and the mounting base (2) are detachably connected by a quick-release structure. The quick-release structure includes a barb (210) and a latch (110). The barb (210) is provided in one of the lumbar support body (1) and the mounting base (2). The latch (110) is provided in the other of the lumbar support body (1) and the mounting base (2). When the barb (210) is engaged with the latch (110), the lumbar support body (1) and the mounting base (2) are relatively fixed in the front-back orientation.

2. The lumbar support device for easy installation according to claim 1, characterized in that, The lumbar support body (1) has elastic deformation capability. The latch (110) is an L-shaped irregular hole, including a narrow locking part (111) and a wide unlocking part (112). The barb (210) includes a positioning part (211) extending in the front-to-back direction. The width of the locking part (111) is close to that of the positioning part (211), and the width of the unlocking part (112) is greater than that of the positioning part (211). The lumbar support device has a switchable locking state and unlocking state. In the locked state, the positioning part (211) is engaged with the locking part (111), the barb (210) cannot continue to slide in the left and right direction, the lumbar support body (1) and the mounting base (2) are relatively fixed, and the lumbar support body (1) cannot produce elastic deformation after being supported; in the unlocked state, the positioning part (211) is engaged with the unlocking part (112), the barb (210) can slide in the left and right direction again, and the lumbar support body (1) produces elastic deformation after being supported.

3. The lumbar support device for easy installation according to claim 2, characterized in that, A positioning structure is provided between the positioning part (211) and the locking part (111). The positioning structure includes a positioning protrusion (213) and a positioning groove (113). The positioning protrusion (213) is disposed in one of the positioning part (211) and the locking part (111), and the positioning groove (113) is disposed in the other of the positioning part (211) and the locking part (111). In the locked state, when the positioning part (211) is engaged with the locking part (111), the positioning protrusion (213) is engaged with the positioning groove (113).

4. The lumbar support device for easy installation according to claim 1, characterized in that, The barb (210) is located at the front end of the mounting base (2). The barb (210) includes a positioning part (211) extending in the front-back direction. The positioning parts (211) on the left and right sides are bent in a direction away from each other to form a limiting part (212). The waist support body (1) is provided with the corresponding slots (110) on the left and right sides.

5. The lumbar support device for easy installation according to claim 1, characterized in that, The barb (210) includes a positioning part (211) extending in the front-back direction. The end of the positioning part (211) is bent in the left-right direction to form a limiting part (212). An elastic part (214) is also provided on the side wall of the bayonet (110). The elastic part (214) has elastic deformation capability. The elastic part (214) is configured to generate elastic deformation and allow the limiting part (212) to pass through the bayonet (110).

6. The lumbar support device for easy installation according to claim 5, characterized in that, The bayonet (110) includes an unlocking part (112), and the elastic part (214) is disposed on the side wall of the unlocking part (112) away from the mounting base (2).

7. The lumbar support device for easy installation according to claim 1, characterized in that, The mounting base (2) includes a U-shaped back frame connecting part (220), which is configured to engage with the side support part (310) of the back frame (3).

8. A type of seat, characterized in that, Includes a back frame (3) and an installation-friendly back frame device as described in any one of claims 1-7, wherein the back frame (3) is a square frame structure, the back frame (3) includes two vertical side support parts (310) on the left and right, the installation-friendly back frame device is arranged horizontally between the two side support parts (310), and the installation-friendly back frame device is slidably connected to the side support parts (310) in the vertical direction.

9. The seat according to claim 8, characterized in that, The mounting base (2) includes a sliding part (230), and a cover plate (320) is detachably connected to the front end face of the side support part (310). A gap is formed between the cover plate (320) and the side support part (310), and the gap is configured as a groove (311). The sliding part (230) is slidably connected to the side support part (310) in the vertical direction through the groove (311).

10. The seat according to claim 9, characterized in that, The front end of the sliding part (230) is provided with a plurality of limiting protrusions (231), and the rear end of the cover plate (320) is recessed along the length direction to form a plurality of limiting grooves (321). When the cover plate (320) is installed on the side support part (310), the limiting protrusions (231) and the limiting grooves (321) engage with each other, so that the mounting base (2) and the side support part (310) are relatively fixed in the vertical direction.

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