Waist support connection structure and chair

Abstract

The utility model relates to the field of chair, disclose a waist support connecting structure and chair, solved the installation problem of seat. The utility model discloses backrest and waist support, one of both is equipped with the slot, the other of both is equipped with the plug, and the plug can be inserted into the slot and make the waist support install on the backrest, armrest, backrest and armrest, one of both is equipped with the insertion block, the other of both is equipped with the recess, and the insertion block and recess can cooperate, locking piece, can insert armrest and backrest, make armrest and backrest relative fixed.

Description

Technical Field

[0001] This utility model relates to the field of chairs, and in particular to a lumbar support connection structure and a chair. Background Technology

[0002] In today's diverse and vibrant daily life, chairs have become an indispensable and common form of seating. Whether in a cozy home environment, a busy office, or various public spaces with many people coming and going, chairs are closely related to people's daily lives and various activities, and their importance is self-evident. The structural design and assembly process of chairs play a crucial role in the user experience, directly affecting many aspects such as comfort, safety, stability, and long-term convenience when people sit down.

[0003] However, many current chair designs suffer from a significant and undeniable problem. Existing chairs typically include a backrest, seat, armrests, and some even feature lumbar support devices, but the installation of these components is often inconvenient, making it difficult for users to assemble and use them themselves. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a lumbar support connection structure that facilitates the installation and assembly of the seat.

[0005] This utility model also proposes a chair with the above-mentioned lumbar support connection structure.

[0006] On one hand, the lumbar support connection structure according to an embodiment of the present utility model includes:

[0007] The backrest and lumbar support each have a slot on one and an insert on the other, the insert being able to be inserted into the slot and to mount the lumbar support on the backrest;

[0008] The armrest, the backrest and the armrest, each have a plug and a groove, the plug and the groove being able to fit together;

[0009] A locking element is inserted into the armrest and the backrest to fix the armrest and the backrest relative to each other.

[0010] According to some embodiments of the present utility model, the backrest or the lumbar support is provided with multiple slots, the plug can slide along the slots, the plug is provided with a buckle, the multiple slots are arranged sequentially along the sliding direction and located on the same side of the sliding direction, and the buckle can engage the slots to fix the lumbar support and the backrest relatively.

[0011] It also includes a limiting rod. In the backrest or the lumbar support, one of them is provided with a limiting groove, and the other of them can be inserted into the limiting rod. The limiting rod can pass through the limiting groove, so that the limiting rod can slide relative to the limiting groove.

[0012] According to some embodiments of the present invention, the buckle includes a fixing part, a deformation part and a snap-fit ​​part arranged in sequence. The fixing part is fixedly disposed on the waist support. The deformation part can deform under the action of external force and has the ability to recover from deformation. The snap-fit ​​part can snap into the buckle groove.

[0013] According to some embodiments of the present utility model, the backrest or the lumbar support is provided with a first sliding groove, the first sliding groove is arranged around a plurality of slots, the slots are all located on the same side of the first sliding groove, and the plurality of slots open obliquely upward;

[0014] When the lumbar support and the backrest slide relative to each other, the snap-fit ​​part abuts against the first sliding groove, allowing the buckle to deform and the snap-fit ​​part to slide along the first sliding groove. The buckle, through its own deformation recovery ability, can drive the snap-fit ​​part to move in a direction tending towards the slot, so that the snap-fit ​​part and the slot can be snapped and fixed.

[0015] According to some embodiments of the present invention, the armrest includes a bracket and a support portion, the bracket and the support portion are separately disposed, the bracket is connected to the backrest, and the height of the connection position between the bracket and the backrest is higher than the connection position between the backrest and the lumbar support.

[0016] According to some embodiments of the present invention, the limiting rod is provided with a knob, which is used to drive the limiting rod to be inserted into the lumbar support or the backrest.

[0017] According to some embodiments of the present invention, the buckle is provided in at least two rows, and the plurality of slots are provided in at least two rows. The buckle can engage with a corresponding row of slots, and the plurality of buckles and slots are symmetrically arranged on both sides of the plug.

[0018] According to some embodiments of the present invention, the end of the plug is provided with an arc-shaped plug, which can be inserted into the slot.

[0019] According to some embodiments of the present invention, a portion of the lumbar support structure protrudes from the lumbar support or the backrest body to form the insert, and a gap is provided between the insert and the lumbar support body.

[0020] On the other hand, the chair according to the present invention includes the lumbar support connection structure according to the above embodiments of the present invention.

[0021] The embodiments of this utility model have at least the following beneficial effects:

[0022] Quick and easy installation and fixation of the lumbar support and backrest: Utilizing the precise fit of slots and plugs, tool-free, one-click quick installation and reliable fixation of the lumbar support and backrest are achieved. This design greatly simplifies the user's operation steps, avoids the cumbersome traditional connection methods, and significantly improves assembly efficiency and convenience. Quick and reliable connection of armrests and backrest: Through the guiding and interlocking action of the insert and groove, the armrest and backrest can be accurately positioned and instantly connected. This connection method is not only intuitive and simple to operate, but also provides a solid foundation for the subsequent locking steps, effectively preventing accidental displacement or loosening of components before locking. Secure locking of armrests and backrest: The insertion design of the locking element is the key guarantee for the stability of the connection. It runs through the armrest and backrest, applying rigid constraints and completely eliminating potential small gaps at the fit of the insert and groove, ensuring a high-strength, wobbly rigid connection between the armrest and backrest, thereby greatly improving the load-bearing capacity and long-term stability of the overall structure.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of the overall structure of the waist support connection structure according to an embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall structure and a partially enlarged schematic diagram of the lumbar support according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the backrest structure according to an embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional structural diagram of the backrest according to an embodiment of the present utility model;

[0029] Figure 5 This is an exploded structural diagram of the waist support connection structure according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the handrail structure according to an embodiment of the present utility model;

[0031] Figure label:

[0032] Backrest 100, slot 110, card slot 120, first sliding groove 130;

[0033] Waist support 200, plug-in 210, buckle 220, fixing part 221, deformable part 222, snap-fit ​​part 223, fastener 224, arc plug 230;

[0034] Limiting rod 300, knob 310, limiting groove 320;

[0035] Handrail 400, insert block 410, bracket 411, support part 412;

[0036] Locking element 500, groove 510. Detailed Implementation

[0037] The following will describe several embodiments of the present invention, including embodiments corresponding to the accompanying drawings. It should be understood that the drawings are used to assist in understanding the technical features and technical solutions of the present invention, and should not be construed as limiting the scope of protection of the present invention.

[0038] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0039] It should be noted that, unless otherwise explicitly defined, when a feature is referred to as "fixed," "connected," or "installed" on another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. The terms "fixed," "connected," and "installed" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0040] It should be noted that the descriptions of orientations or positional relationships indicated by terms such as up, down, left, right, top, bottom, front, back, inside, and outside used in this utility model are based on the orientations or positional relationships indicated by the accompanying drawings or embodiments. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] It should be noted that the term "and / or" used in this utility model includes any combination of one or more of the related listed items, "several" means one or more, "multiple" means two or more, "greater than", "less than", "exceeding" are understood to exclude the number itself, and "above", "below", "within" are understood to include the number itself.

[0042] It should be noted that the use of "first" and "second" in this utility model is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0043] It should be noted that, unless otherwise expressly defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and not for limiting the scope of the invention.

[0044] Reference Figures 1-6 The basic embodiment of the first aspect of this utility model provides a lumbar support connection structure, including:

[0045] The backrest 100 and the lumbar support 200 are provided with a slot 110 on one side and a plug 210 on the other side. The plug 210 can be inserted into the slot 110 and the lumbar support 200 is installed on the backrest 100.

[0046] The armrest 400, backrest 100 and armrest 400, one of which is provided with a plug 410, and the other of which is provided with a groove 510, the plug 410 and the groove 510 can be fitted together;

[0047] The locking element 500 can be inserted into the armrest 400 and the backrest 100 to fix the armrest 400 and the backrest 100 relatively.

[0048] According to embodiments of this utility model, the following effects can be achieved through this configuration: Quick and secure installation of the lumbar support 200 and backrest 100: Utilizing the precise fit between the slot 110 and the plug 210, tool-free, one-click quick installation and reliable fixation between the lumbar support 200 and backrest 100 are achieved. This design greatly simplifies user operation, avoids the cumbersome nature of traditional connection methods, and significantly improves assembly efficiency and convenience. Quick and reliable connection of the armrest 400 and backrest 100: Through the guiding and interlocking action of the plug 410 and the groove 510, the armrest 400 and backrest 100 are accurately positioned and instantly connected. This connection method is not only intuitive and simple to operate, but also provides a solid foundation for subsequent locking steps, effectively preventing accidental displacement or loosening of components before locking. Secure locking of the armrest 400 and backrest 100: The insertion design of the locking component 500 is a key guarantee for the stability of the connection. It runs through the armrest 400 and the backrest 100, applying rigid constraints and completely eliminating the potential small gaps at the fit between the insert 410 and the groove 510. This ensures a high-strength, wobbly rigid connection between the armrest 400 and the backrest 100, thereby significantly improving the overall structural load-bearing capacity and long-term stability.

[0049] In some embodiments, the armrest 400 includes a bracket 411 and a support portion 412. A groove 510 or a plug 410 is provided on the bracket 411. The bracket 411 is connected to the backrest 100, and the support portion 412 is provided on the bracket. The armrest 400 can be disassembled into multiple structures, which is beneficial for transportation.

[0050] Furthermore, the support 411 is spiral-shaped. When the backrest 100 is subjected to external force, the support 411 will be subjected to the pressure of the backrest. The spiral structure can disperse the concentrated external force along the entire spiral line, thereby reducing the pressure per unit area and improving the load-bearing capacity of the structure.

[0051] In some embodiments, the armrest 400 and the lumbar support 200 are separate components, with the connection between the armrest 400 and the backrest 100 being higher than the connection between the backrest 100 and the lumbar support 200. When the backrest 100 tilts backward, the force on the backrest 100 is first transmitted to the armrest 400, and then to the lumbar support 200. Because the connection between the armrest 400 and the backrest 100 is higher than the connection between the backrest 100 and the lumbar support 200, the force on the lumbar support 200 is reduced, preventing the lumbar support 200 from easily deforming and affecting the use of the lifting function.

[0052] In some embodiments, the backrest 100 or the lumbar support 200 is provided with a plurality of slots 120, the plug 210 can slide along the slot 110, the plug 210 is provided with a buckle 220, the plurality of slots 120 are arranged sequentially along the sliding direction and located on the same side of the sliding direction, and the buckle 220 can engage the slots 120 to fix the lumbar support 200 and the backrest 100 relatively.

[0053] It also includes a limiting rod 300, a backrest 100 or a lumbar support 200, one of which is provided with a limiting groove 320, and the other of which can be inserted into the limiting rod 300, and the limiting rod 300 can pass through the limiting groove 320, so that the limiting rod 300 can slide relative to the limiting groove 320.

[0054] With this setup, installation and height adjustment are convenient: the lumbar support 200 can be easily installed on the backrest 100 through the sliding engagement of the plug 210 and the slot 110. Multiple slots 120 on the lumbar support 200 insert 210 along the sliding direction cooperate with the buckles 220 on the backrest 100, allowing users to quickly and accurately fix the lumbar support 200 at multiple preset height positions according to their individual body shape or comfort needs. Adjustment flexibility and personalized adaptation: The multi-position slot 120 design provides a wide and flexible height adjustment range, effectively meeting the personalized lumbar support needs of users of different heights, significantly improving the adaptability and comfort of the seat. Simple operation and reliable locking: The snap-fit ​​method between the buckle 220 and the slot 120 is extremely simple to operate, while providing a stable and reliable mechanical lock. The entire connection structure mainly consists of the insert 210, slot 110, slot 120, and buckle 220. The structure is simple and clear, easy to manufacture and assemble, which helps control production costs and improve product reliability. The limiting rod 300 guides the sliding between the lumbar support 200 and the backrest 100, while also limiting the sliding length of the lumbar support 200 and preventing it from falling off.

[0055] In some embodiments, a first embodiment of the latch 220 is described with reference to the appendix. Figure 2 The buckle 220 includes a fixing part 221, a deformable part 222, and a locking part 223 arranged sequentially. The fixing part 221 is fixedly disposed on the waist support 200. The deformable part 222 can deform under the action of external force and has the ability to recover from deformation. The locking part 223 can lock into the slot 120. The fixing part 221 is fixedly disposed on the waist support 200. The buckle 220 can deform relatively under the action of external force. The locking part 223 can lock into the slot 120. When the locking part 223 passes the outside of the slot 120, it can deform and recover from deformation, and can be reinserted into the slot 120, so that the locking part 223 and the slot 120 are locked together. It should be noted that the buckle 220 is an elastic element, and can also be a plastic part, fiberglass or other metal part, which has a slight elastic deformation ability.

[0056] In some embodiments, a second embodiment of the latch 220 includes a latching member and an elastic member. The elastic member is driven by an elastic force to engage the latching member with the slot 120, allowing the latching member to engage with different slots 120. The elastic member can be a spring, torsion spring, sheet metal, or other elastic material.

[0057] In some embodiments, the backrest 100 or the lumbar support 200 is provided with a first sliding groove 130, the first sliding groove 130 is arranged around a plurality of slots 120, the slots 120 are all located on the same side of the first sliding groove 130, and the plurality of slots 120 open obliquely upward.

[0058] The snap-fit ​​part 223 abuts against the first sliding groove 130, so that the buckle 220 can deform and the snap-fit ​​part 223 can slide along the first sliding groove 130. The buckle 220 can drive the snap-fit ​​part 223 to move towards the slot 120 through its own deformation recovery ability, so that the snap-fit ​​part 223 and the slot 120 can be snap-fitted and fixed.

[0059] In this configuration, the backrest 100 and lumbar support 200 can slide relative to each other, and the buckle 220 can engage with different slots 120, fixing the backrest 100 at different heights to accommodate different user habits. Through the mutual sliding of the backrest 100 and lumbar support 200 insert 210, the buckle 220 can engage with different slots 120, placing the backrest 100 at different heights. Guided by the first sliding groove 130, the buckle 220 moves accordingly, and the engaging part 223 can slide along the first sliding groove 130. During the movement of the engaging part 223, due to the elastic effect of deformation recovery, the engaging part 223 rotates towards the slot 120, causing the buckle 220 to engage with the slot 120. Continuing to apply external force can disengage the engaging part 223 from the slot 120, allowing the buckle 220 to engage with the slots 120 sequentially, adjusting the height according to user needs.

[0060] In some embodiments, the buckle 220 further includes a fixing member 224, which is disposed on the insert 210. The fixing member 224 and the insert 210 cooperate to limit the fixing part 221, so that the fixing part 221 is fixed on the insert 210. The buckle 220 can be fixed on the insert 210 by means of the fixing member 224.

[0061] In some embodiments, the limiting rod 300 is provided with a knob 310, which is used to drive the limiting rod 300 into the lumbar support 200 or the backrest 100. The knob 310 facilitates the insertion of the limiting rod 300 into the structure.

[0062] In some embodiments, the snap fasteners 220 have at least two rows, and the multiple slots 120 have at least two rows. The snap fasteners 220 can engage with a corresponding row of slots 120. The multiple rows of snap fasteners 220 and slots 120 are symmetrically arranged on both sides of the plug-in 210. Increasing the connection of multiple rows of snap fasteners 220 and slots 120 improves installation stability; through symmetrical arrangement, the symmetrical snap fasteners 220 on both sides can form opposite forces, making the installation of snap fasteners 220 and slots 120 more stable.

[0063] In some embodiments, the end of the plug 210 is provided with an arc-shaped plug 230, which can be inserted into the slot 110. This facilitates the installation of the plug 210 and the slot 110.

[0064] In some embodiments, a portion of the structure of the lumbar support 200 or the backrest 100 protrudes from the body of the lumbar support 200 or the backrest 100 to form an insert 210, and a gap is provided between the insert 210 and the body of the lumbar support 200. A cushioning effect is formed between the lumbar support 200 and the backrest 100, improving comfort and facilitating the installation and use of the lumbar support 200 and the backrest 100.

[0065] It should be noted that in this specification, terms such as "one embodiment", "some embodiments", "basic embodiment", and "extended embodiment" may be used to describe several embodiments of the present invention, and the specific features, structures, materials or characteristics of the several embodiments may be combined in accordance with the principles and spirit of the present invention.

[0066] Although some embodiments of the present utility model have been shown and described in this specification, the present utility model should not be limited to the above embodiments. As long as they achieve the technical effects of the present utility model by the same or equivalent means, any changes, modifications, equivalent substitutions and equivalent variations of these embodiments within the spirit and principles disclosed in the present utility model, without departing from the principles and purpose of the present utility model, should be included within the scope of protection disclosed in the present utility model and should be considered to fall within the protection scope of the present utility model.

Claims

1. A lumbar support connection structure, characterized in that, include: The backrest (100) and the lumbar support (200) are provided, one of which is provided with a slot (110) and the other is provided with a plug (210), the plug (210) being able to be inserted into the slot (110) and to install the lumbar support (200) on the backrest (100); The armrest (400), the backrest (100) and the armrest (400) are provided with a plug (410) on one side and a groove (510) on the other side, and the plug (410) and the groove (510) can cooperate; A locking element (500) is inserted into the armrest (400) and the backrest (100) to fix the armrest (400) and the backrest (100) relative to each other.

2. The lumbar support connection structure according to claim 1, characterized in that: The backrest (100) or the lumbar support (200) is provided with multiple slots (120), the plug (210) can slide along the slot (110), the plug (210) is provided with a buckle (220), the multiple slots (120) are arranged sequentially along the sliding direction and located on the same side of the sliding direction, and the buckle (220) can engage the slot (120) to fix the lumbar support (200) and the backrest (100) relatively. It also includes a limiting rod (300). In the backrest (100) or the lumbar support (200), one of them is provided with a limiting groove (320), and the other of them can be inserted into the limiting rod (300). The limiting rod (300) can pass through the limiting groove (320) so that the limiting rod (300) can slide relative to the limiting groove (320).

3. The lumbar support connection structure according to claim 2, characterized in that: The buckle (220) includes a fixing part (221), a deformable part (222), and a snap-fit ​​part (223) arranged in sequence. The fixing part (221) is fixedly disposed on the waist support (200). The deformable part (222) can be deformed under the action of external force and has the ability to recover from deformation. The snap-fit ​​part (223) can snap into the slot (120).

4. The lumbar support connection structure according to claim 3, characterized in that: The backrest (100) or the lumbar support (200) is provided with a first sliding groove (130), the first sliding groove (130) is arranged around a plurality of slots (120), the slots (120) are all located on the same side of the first sliding groove (130), and the plurality of slots (120) open obliquely upward; When the lumbar support (200) and the backrest (100) slide relative to each other, the snap-fit ​​part (223) abuts against the first sliding groove (130), so that the buckle (220) can deform and the snap-fit ​​part (223) can slide along the first sliding groove (130). The buckle (220) can drive the snap-fit ​​part (223) to move towards the slot (120) through its own deformation recovery ability, so that the snap-fit ​​part (223) and the slot (120) can be snapped and fixed.

5. The lumbar support connection structure according to claim 1, characterized in that: The armrest (400) includes a bracket (411) and a support (412). The bracket (411) and the support (412) are separately provided. The bracket (411) is connected to the backrest (100), and the support (412) is connected to the bracket (411). The height of the connection position between the bracket (411) and the backrest (100) is higher than the connection position between the backrest (100) and the lumbar support (200).

6. The lumbar support connection structure according to claim 2, characterized in that: The limiting rod (300) is provided with a knob (310), which is used to drive the limiting rod (300) to be inserted into the lumbar support (200) or the backrest (100).

7. The lumbar support connection structure according to claim 2, characterized in that: The buckle (220) has at least two rows, and the multiple slots (120) have at least two rows. The buckle (220) can engage with a corresponding row of slots (120). The multiple rows of buckles (220) and slots (120) are symmetrically arranged on both sides of the plug (210).

8. The lumbar support connection structure according to claim 1, characterized in that: The end of the plug (210) is provided with an arc-shaped plug (230), which can be inserted into the slot (110).

9. The lumbar support connection structure according to claim 1, characterized in that: A portion of the structure of the lumbar support (200) or backrest (100) protrudes from the body of the lumbar support (200) or backrest (100) to form the insert (210), and a gap is provided between the insert (210) and the body of the lumbar support (200).

10. A chair, characterized in that: Includes the lumbar support connection structure as described in any one of claims 1 to 9.

Images