seat

Abstract

The utility model discloses a seat, include: chair seat subassembly, chair seat subassembly has first support structure, chair back subassembly, chair back subassembly includes chair back main part and first connecting frame, and first connecting frame sets up one side at chair back main part, one of first support structure and first connecting frame is equipped with connecting groove, and the other is equipped with connecting structure, and connecting structure is detachably installed in connecting groove. The present application has solved the problem that the packing volume is big, and the single overhauling difficulty problem of inconvenient carrying caused by the dismounting of traditional seat chair back and chair seat. In addition, the detachable cooperation of connecting groove and connecting structure is used to realize the detachable connection of first connecting frame and first support structure, so that the dismounting process of first connecting frame and first support structure can be simplified, and the dismounting convenience of chair seat subassembly and chair back subassembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a seating system. Background Technology

[0002] As a basic piece of furniture, chairs are widely used in daily life and office spaces. With the diversification of user needs and advancements in manufacturing technology, modern chairs have seen significant improvements in functionality and comfort, but this has also led to increased structural complexity. Traditional chairs generally employ a non-removable, one-piece design. This structure has obvious limitations. First, in transportation and warehousing, the one-piece structure results in excessively large packaging volumes, increasing logistics costs and occupying significant storage space. Second, when the chair needs repair, because the parts are not disassembled, it often requires complete transport or replacement, increasing maintenance costs. Although related technologies have incorporated detachable backrests and seats, the assembly and disassembly methods are complex and cumbersome, making it inconvenient for users to assemble themselves or disassemble themselves during subsequent use or after-sales service. Utility Model Content

[0003] The main objective of this invention is to provide a seat that addresses the aforementioned technical problems.

[0004] To achieve the above objectives, the seat proposed in this utility model includes:

[0005] A seat assembly having a first support structure;

[0006] A chair back assembly, comprising a chair back body and a first connecting frame, the first connecting frame being disposed on one side of the chair back body;

[0007] One of the first support structure and the first connecting frame is provided with a connecting groove, and the other is provided with a connecting structure, wherein the connecting structure is detachably installed in the connecting groove.

[0008] Optionally, the connecting groove is provided on the first support structure and has an opening, the first connecting frame is provided with a connecting structure, the connecting structure includes a first crossbar, and the first crossbar is detachably installed in the connecting groove.

[0009] Optionally, the first crossbar includes a mandrel and a sleeve, the sleeve is fitted onto the mandrel, the mandrel and the sleeve are rotatably engaged, the sleeve has a through hole that penetrates the top and bottom walls of the sleeve, and the two opposite walls of the connecting groove have opposite through holes and connecting holes, which are detachably connected by fasteners.

[0010] Optionally, the sleeve includes a first shell portion and a second shell portion that are spliced ​​together, with the first shell portion and the second shell portion together encircling the mandrel.

[0011] Optionally, the groove wall of the connecting groove is provided with a first positioning groove, and the outer surface of the sleeve is provided with a positioning rib, which is positioned and engaged with the first positioning groove.

[0012] Optionally, the first connecting frame is provided with an adapter sleeve, a connecting groove is provided in the adapter sleeve and has an opening, and the first support structure is provided with a connecting structure, which is detachably inserted into the connecting groove through the opening of the connecting groove.

[0013] Optionally, the groove wall of the connecting groove is provided with a locking hole, and the connecting structure includes a buckle. When the connecting structure is inserted into the connecting groove through the opening of the connecting groove, the buckle is detachably locked into the locking hole. The buckle is exposed through the locking hole so that the buckle can be released from the locking hole after being pressed.

[0014] Optionally, the connecting structure also includes a spindle, the adapter sleeve includes a sleeve body and a front cover, the front end of the sleeve body has an installation groove, the spindle is rotatably installed in the installation groove, and the front cover is connected to the front end of the sleeve body and covers the opening of the installation groove.

[0015] Optionally, the seat assembly also has a second support structure located below the first support structure; the backrest assembly also includes a second connecting frame connected to one side of the backrest body and located below the first connecting frame, and the second connecting frame is detachably connected to the second support structure.

[0016] Optionally, the second support structure is provided with a front-opening assembly groove, and the lower groove wall of the assembly groove is provided with an upward-protruding stop rib. The end of the stop rib and the upper groove wall of the assembly groove form a disassembly and assembly gap. The second connecting frame has a second crossbar, which is inserted into or removed from the assembly groove through the disassembly and assembly gap. The second crossbar abuts against the stop rib and the lower groove wall of the assembly groove inside the assembly groove.

[0017] This utility model of a chair solves the problems of large packaging volume, inconvenient handling, and difficult individual repair caused by the inability to disassemble the backrest and seat of traditional chairs. Specifically, the backrest and seat components can be packaged separately, greatly reducing the packaging volume and facilitating transportation and storage. During handling, the backrest and seat components can be transported separately, reducing the weight of each transport and lowering the difficulty of handling. In addition, when the backrest or seat component needs repair, the corresponding part can be disassembled for repair without having to handle the entire chair, simplifying the repair process and saving repair time and costs. Furthermore, the detachable connection between the first connecting frame and the first support structure is achieved through the detachable cooperation of the connecting groove and the connecting structure, which simplifies the assembly and disassembly process of the first connecting frame and the first support structure, thereby improving the ease of assembly and disassembly of the seat and back components. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is an exploded view of the structure of an embodiment of the seat of this utility model;

[0020] Figure 2 This is an exploded view of the seat of this utility model from another direction;

[0021] Figure 3 This is an exploded view of the first support structure and the first crossbar in this utility model;

[0022] Figure 4 This is a cross-sectional view of the first support structure and the first crossbar in this utility model;

[0023] Figure 5 This is an exploded view of the first support structure and the first connecting frame in this utility model;

[0024] Figure 6 This is an exploded view of the first support structure and the first connecting frame in this utility model from another direction;

[0025] Figure 7 This is a cross-sectional view of the first support structure and the first connecting frame in this utility model;

[0026] Figure 8 This is an exploded view of the second support structure and the second crossbar in this utility model.

[0027] Explanation of icon numbers:

[0028] label name label name label name 11 First supporting structure 12 Second support structure 20 Chair back body 30 First connecting frame 40 Second connecting frame 111 Connecting slot 31 First horizontal bar 311 mandrel 312 sleeve 313 Through hole 112 Via 113 Connection hole 314 First shell 315 Second shell 114 First positioning groove 316 Positioning reinforcement 32 Adapter 321 slot 322 Snap 115 Buckle 323 Reinforcing ribs 13 support rod 131 Second positioning groove 324 main body 325 Front cover 326 Mounting slot 121 Assembly slot 122 Stop rib 123 Disassembly / assembly gap 41 Second horizontal bar

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] This utility model proposes a seat.

[0034] In the embodiments of this utility model, such as Figures 1 to 3 As shown, the seat includes: a seat assembly having a first support structure 11; and a backrest assembly including a backrest body 20 and a first connecting frame 30, the first connecting frame 30 being disposed on one side of the backrest body 20; one of the first support structure 11 and the first connecting frame 30 is provided with a connecting groove 111, and the other is provided with a connecting structure, the connecting structure being detachably installed in the connecting groove 111.

[0035] In this embodiment, the first support structure 11 refers to the rigid structure in the seat assembly used to support the connecting groove 111 or the connecting structure. It can be implemented using metal or injection-molded parts, such as welded steel pipes or engineering plastic brackets, and its structural strength must meet the load-bearing requirements of the seat. The first connecting frame 30 refers to the transition component in the backrest assembly that connects to the seat assembly. By connecting the first connecting frame 30 to the first support structure 11 of the seat assembly, the backrest body 20 can be installed on the seat assembly to form a complete seat. The first connecting frame 30 can specifically be a U-shaped metal bracket or a more complex multi-legged bracket. The first connecting frame 30 is installed on one side of the backrest body 20 by means of snaps, ball joints, or bolts, and is used to transmit the force exerted on the backrest body 20 to the seat assembly.

[0036] The connecting groove 111 refers to a recessed structure used to accommodate the connecting structure. Specifically, it can be implemented using a groove structure with an opening. The direction of the opening is set according to assembly requirements, such as a side opening or a top opening, allowing the connecting structure to be inserted or removed along a specific path. The connecting structure refers to the component that forms a mechanical engagement with the connecting groove 111. Specifically, it can be implemented using a rod-like, snap-fit, or pin-like structure, such as a crossbar or snap-fit, achieving a detachable connection through sliding, snap-fit, or threaded engagement.

[0037] A reversible mechanical interlock is formed by the cooperation of the connecting groove 111 and the connecting structure, allowing for easy and convenient separation of the backrest assembly and the seat assembly. The complementary layout of the connecting groove 111 and the connecting structure increases the mating area between the first support structure 11 and the first connecting frame 30, ensuring assembly stability. When assembling the seat assembly and the backrest assembly, the connecting structure can be inserted into the connecting groove 111, establishing a detachable connection between the first support structure 11 and the first connecting frame 30. When removing the backrest assembly from the seat assembly, the connecting structure can be pulled out of the connecting groove 111. The complementarity of the connecting groove 111 and the connecting structure forms a simple and effective mechanical connection. The connecting groove 111 provides a receiving space, while the connecting structure is designed to match the connecting groove 111. This matching achieves a stable connection while maintaining detachability. This connection method provides sufficient strength to ensure the stability of the backrest during use and simplifies the assembly and disassembly process of the backrest assembly.

[0038] Through the above solution, this application solves the problems of large packaging volume, inconvenient handling, and difficult individual repair caused by the inability to disassemble the backrest and seat of traditional chairs. Specifically, the backrest and seat components can be packaged separately, greatly reducing the packaging volume and facilitating transportation and storage. During handling, the backrest and seat components can be transported separately, reducing the weight of each transport and lowering the handling difficulty. In addition, when the backrest or seat component needs repair, the corresponding part can be disassembled for repair without dealing with the entire chair, simplifying the repair process and saving repair time and costs. This detachable design also increases the flexibility of the chair, allowing users to replace the backrest with different styles or materials as needed, improving the product's adaptability and service life. Furthermore, the detachable connection between the first connecting frame 30 and the first support structure 11 is achieved through the detachable cooperation of the connecting groove 111 and the connecting structure, simplifying the disassembly and assembly process of the first connecting frame 30 and the first support structure 11, thereby improving the ease of disassembly and assembly of the seat and backrest components.

[0039] For example, such as Figures 1 to 3As shown, the connecting groove 111 is provided on the first support structure 11 and has an opening. The first connecting frame 30 is provided with a connecting structure, which includes a first crossbar 31. The first crossbar 31 is detachably installed on the connecting groove 111.

[0040] The opening direction of the connecting groove 111 is defined as perpendicular to the length direction of the first crossbar 31, for example, the opening faces forward. The two ends of the first crossbar 31 extend out of the left and right ends of the connecting groove 111 to connect with other components of the first connecting frame 30.

[0041] like Figure 3 As shown, during the assembly of the chair back assembly and the chair seat assembly, the first crossbar 31 moves along a straight line and enters the connecting groove 111, with the outer surface of the first crossbar 31 making surface contact with the inner wall of the connecting groove 111. During the disassembly of the chair back assembly and the chair seat assembly, a pulling force is applied to the first crossbar 31 along direction two, causing the first crossbar 31 to disengage from the connecting groove 111. Directions one and two are opposite directions.

[0042] The above technical solution achieves precise positioning and easy assembly / disassembly of the chair back assembly and seat assembly. During installation, simply insert the first crossbar 31 into the connecting groove 111 through the opening along direction one, reducing positioning deviations during installation. During disassembly, simply pull the first crossbar 31 out of the opening of the connecting groove 111 along direction two, simplifying the operation. This structural design, while ensuring detachability, improves assembly efficiency and connection reliability, solving the problems of inaccurate positioning and cumbersome disassembly in traditional connection methods.

[0043] Specifically, such as Figure 3 and Figure 4 As shown, the first crossbar 31 includes a spindle 311 and a sleeve 312. The sleeve 312 is sleeved on the spindle 311, and the spindle 311 and the sleeve 312 are rotatably engaged. The sleeve 312 has a through hole 313 that penetrates the top and bottom walls of the sleeve 312. The two opposite groove walls of the connecting groove 111 are respectively provided with opposite through holes 112 and connecting holes 113. The through holes 112, the through holes 313 and the connecting holes 113 are detachably connected by fasteners.

[0044] A through hole 112 is formed in the lower groove wall of the connecting groove 111, and a connecting hole 113 is formed in the upper groove wall of the connecting groove 111. During assembly, after the sleeve 312 mates with the connecting groove 111, the bottom end of the through hole 313 aligns with the through hole 112, and the top end of the through hole 313 aligns with the connecting hole 113. The through hole 112, the through hole 313, and the connecting hole 113 are detachably connected by fasteners to achieve a fixed connection between the sleeve 312 and the first support structure 11. The connecting hole 113 can be a threaded hole, and the fastener can be a bolt. The bolt passes through the through hole 112 and the through hole 313 and engages with the threaded connection of the connecting hole 113. When it is necessary to disassemble the sleeve 312 from the connecting groove 111, simply remove the fasteners and then remove the first crossbar 31 from the connecting groove 111, thus releasing the connection between the sleeve 312 and the connecting groove 111, and also releasing the connection between the first crossbar 31 and the first support structure 11.

[0045] The rotatable engagement between the spindle 311 and the sleeve 312 allows the spindle 311 to rotate within the sleeve 312, that is, it allows the spindle 311 to rotate relative to the first support structure 11. This allows the backrest assembly to rotate relative to the seat assembly via the spindle 311, thus facilitating adjustment of the angle of the backrest body 20. A lubricating layer can be applied to the inner wall and / or end face of the sleeve 312. This lubricating layer reduces friction between the sleeve 312 and the spindle 311 and / or between the sleeve 312 and other components of the first connecting frame 30, thereby reducing noise and resistance during relative rotation of the backrest assembly.

[0046] Specifically, such as Figure 4 As shown, the sleeve 312 includes a first shell portion 314 and a second shell portion 315 that are spliced ​​together, and the first shell portion 314 and the second shell portion 315 together encircle the mandrel 311.

[0047] The inner surfaces of the first shell 314 and the second shell 315 are arc-shaped concave surfaces. The first shell 314 and the second shell 315 can be spliced ​​by snap-fit, bolts or slide rails. For example, a toothed structure that meshes with each other can be set at the splice to prevent axial misalignment of the two shells after splicing. The first shell 314 and the second shell 315 are radially aligned along the mandrel 311 to form a complete cylindrical structure. The split structure allows the sleeve 312 to be assembled in stages during the installation of the mandrel 311. It also facilitates the application of a lubricating layer to the inner wall and / or end side of the sleeve 312. In addition, it can also meet the assembly of mandrels 311 with different thicknesses at both ends and in the middle. For example, the first shell 314 can be placed on one side of the mandrel 311 first, and then the second shell 315 can be snapped on from the other side, so that the first shell 314 and the second shell 315 together encircle the mandrel 311. The splicing edge of the first shell 314 can be provided with a protrusion, while the corresponding edge of the second shell 315 is provided with a groove, and the two can be quickly spliced ​​together by a snap-fit ​​method.

[0048] In practical applications, such as Figure 3 and Figure 4 As shown, the groove wall of the connecting groove 111 is provided with a first positioning groove 114, and the outer surface of the sleeve 312 is provided with a positioning rib 316, which is positioned and engaged with the first positioning groove 114.

[0049] The first positioning groove 114 is formed on the inner wall of the connecting groove 111. The first positioning groove 114 is configured as a groove structure extending from the opening of the connecting groove 111 towards the inner wall. The positioning rib 316 is constructed as a protrusion structure extending circumferentially along the outer surface of the sleeve 312. When the sleeve 312 is installed into the connecting groove 111, the positioning rib 316 cooperates with the first positioning groove 114, so that the sleeve 312 will not axially shift within the connecting groove 111. The number of positioning ribs 316 can be single or multiple, for example, two positioning ribs 316 symmetrically distributed along the axial direction of the sleeve 312. The number and position of the first positioning groove 114 correspond to and match the positioning ribs 316. During the process of the sleeve 312 being inserted into the connecting groove 111, the positioning ribs 316 are guided into the first positioning groove 114, so that the through hole 313 of the sleeve 312 automatically maintains coaxial alignment with the through hole 112 and the connecting hole 113 of the connecting groove 111.

[0050] Through the above technical solution, precise positioning between the sleeve 312 and the connecting groove 111 is achieved. The cooperation between the positioning rib 316 and the first positioning groove 114 effectively prevents axial misalignment of the sleeve 312 within the connecting groove 111. This positioning structure ensures that the through hole 313 of the sleeve 312 is coaxially aligned with the through hole 112 and connecting hole 113 of the connecting groove 111, facilitating the smooth passage and installation of fasteners. This improves assembly accuracy and connection stability, while also increasing installation efficiency. Furthermore, the cooperation between the positioning rib 316 and the first positioning groove 114 enhances the mechanical locking effect between the sleeve 312 and the connecting groove 111, further improving the overall stability of the connection structure.

[0051] For example, such as Figures 5 to 7 As shown, the first connecting frame 30 is provided with an adapter sleeve 32, and a connecting groove 111 is provided in the adapter sleeve 32 and has an opening. The first support structure 11 is provided with a connecting structure, and the connecting structure is detachably inserted into the connecting groove 111 through the opening of the connecting groove 111.

[0052] The adapter sleeve 32 can be made of metal or plastic. The shape of the adapter sleeve 32 can be cylindrical, rectangular, or a flared shape with its width gradually increasing from front to back. The connecting groove 111 passes through the rear end of the adapter sleeve 32, forming an opening. During installation, align the opening of the connecting groove 111 on the adapter sleeve 32 with the connecting structure, and then insert the connecting structure into the connecting groove 111 through the opening. During disassembly, the adapter sleeve 32 can be pulled out in the opposite direction from the opening, allowing the connecting structure to disengage from the connecting groove 111.

[0053] The open structure of the adapter sleeve 32 allows the connecting structure to move in only one direction during insertion, avoiding the operational complexity caused by multi-degree-of-freedom adjustments. This design improves assembly efficiency and reduces the requirements for operating space, making it particularly suitable for rapid assembly and disassembly in confined spaces or complex structural scenarios.

[0054] Specifically, such as Figures 5 to 7 As shown, the groove wall of the connecting groove 111 has a locking hole 322. The connecting structure includes a buckle 115. When the connecting structure is inserted into the connecting groove 111 through the opening of the connecting groove 111, the buckle 115 is detachably locked into the locking hole 322. The buckle 115 is exposed through the locking hole 322 so that the buckle 115 can be released from the locking hole 322 after being pressed.

[0055] When the connecting structure is inserted along the opening direction of the connecting groove 111, the buckle 115 is squeezed by the groove wall and undergoes elastic deformation until the end of the buckle 115 aligns with the locking hole 322, after which it returns to its original shape and embeds itself in the locking hole 322, forming a mechanical lock. At this time, the exposed part of the buckle 115 can protrude outward through the locking hole 322, so that the exposed surface of the buckle 115 is flush with or slightly protruding from the outer surface of the adapter sleeve 32. During disassembly, the exposed part of the buckle 115 is subjected to vertical pressing pressure, causing the buckle 115 to bend elastically, so that its end disengages from the limiting area of ​​the locking hole 322. The connecting structure can then be pulled out in the reverse direction of insertion to complete the disassembly operation. The cooperation between the buckle 115 and the locking hole 322 not only achieves the connection stability between the connecting structure and the adapter sleeve 32, but also provides a tool-free quick-release structure through the exposed design.

[0056] The above technical solution achieves a secure and reliable snap-fit ​​connection between the connecting structure and the connecting groove 111, preventing accidental detachment of the connecting structure. Simultaneously, the exposed design of the snap-fit ​​115 simplifies disassembly, allowing for easy and convenient disassembly without tools. This design ensures both the strength of the connection and the ease of assembly and disassembly, effectively solving the problems of unstable connections or inconvenient disassembly in existing technologies.

[0057] It should be noted that in other embodiments, the positions of the latch and the buckle can be interchanged. For example, the groove wall of the connecting groove is formed with a buckle and a pressing hole, the connecting structure is provided with a latch, the buckle is engaged with the latch and exposed through the pressing hole, and the user can press the buckle through the pressing hole to disengage the buckle from the latch.

[0058] Specifically, the locking hole 322 is formed in the lower groove wall of the connecting groove 111, and a reinforcing rib 323 protrudes from the lower groove wall of the connecting groove 111. The reinforcing rib 323 is located between the locking hole 322 and the opening of the connecting groove 111. By placing the locking hole 322 in the lower groove wall of the connecting groove 111, the locking hole 322 and the exposed buckle 115 can be concealed and protected, preventing the locking hole 322 from being easily pressed accidentally, and also improving the appearance of the seat. The reinforcing rib 323 can improve the structural strength of the lower groove wall of the connecting groove 111, preventing the lower groove wall from easily deforming or being damaged under the snapping action of the buckle 115, thereby improving the connection stability between the connecting structure and the adapter sleeve 32.

[0059] In practical applications, such as Figure 6 and Figure 7 As shown, the connecting structure also includes a spindle 311. The adapter sleeve 32 includes a sleeve body 324 and a front cover 325. The front end of the sleeve body 324 is provided with an installation groove 326. The spindle 311 is rotatably installed in the installation groove 326. The front cover 325 is connected to the front end of the sleeve body 324 and covers the opening of the installation groove 326.

[0060] The mounting groove 326 at the front end of the sleeve body 324 is a cylindrical cavity structure. The mounting groove 326 ensures that the spindle 311 can rotate while restricting radial wobble. When installing the adapter sleeve 32, first, the sleeve body 324 is placed on the spindle 311, that is, the spindle 311 is inserted into the mounting groove 326. Then, the front cover 325 is connected to the front end of the sleeve body 324 to prevent the spindle 311 from detaching from the mounting groove 326. The sleeve body 324 and the front cover 325 are connected by screws or clips. The front opening of the mounting groove 326 is completely closed by the front cover 325. When the spindle 311 rotates, it is mechanically blocked by the front cover 325, effectively preventing the risk of falling off.

[0061] like Figure 5 and Figure 6 As shown, the chair seat assembly includes a support rod 13, a first support structure 11 protruding from the support rod 13, and a second positioning groove 131 formed on the support rod 13. The second positioning groove 131 is circumferentially disposed around the fixed end of the first support structure 11, and the rear peripheral edge of the adapter sleeve 32 is positioned and engaged with the second positioning groove 131. This not only limits the insertion depth of the connecting structure in the connecting groove 111 but also prevents the adapter sleeve 32 from shifting vertically or laterally.

[0062] For example, such as Figure 1 and Figure 2As shown, the seat assembly also has a second support structure 12, which is located below the first support structure 11; the backrest assembly also includes a second connecting frame 40, which is connected to one side of the backrest body 20 and located below the first connecting frame 30, and the second connecting frame 40 is detachably connected to the second support structure 12.

[0063] The second support structure 12 is positioned below the first support structure 11, forming a layered support system. The second connecting frame 40 is installed on the back of the chair back body 20 and below the first connecting frame 30, and is detachably connected to the second support structure 12. This creates a double-connection-point structure between the seat assembly and the chair back assembly. The second support structure 12 and the second connecting frame 40 cooperate in the mounting groove 121 to provide additional support, effectively preventing concentrated stress on the first support structure 11 caused by a single-point connection, thereby improving the structural stability of the seat assembly.

[0064] Specifically, such as Figure 8 As shown, the second support structure 12 is provided with a forward-opening assembly groove 121. The lower groove wall of the assembly groove 121 is provided with an upward-protruding stop rib 122. The end of the stop rib 122 and the upper groove wall of the assembly groove 121 form a disassembly gap 123. The second connecting frame 40 has a second crossbar 41. The second crossbar 41 is inserted into or removed from the assembly groove 121 through the disassembly gap 123. The second crossbar 41 abuts against the stop rib 122 and the lower groove wall of the assembly groove 121 within the assembly groove 121.

[0065] The opening direction of the assembly slot 121 is limited to facing forward, so that the second crossbar 41 can be moved in the front-back direction to complete the disassembly and assembly operation. When the second crossbar 41 moves in the front-back direction, the disassembly and assembly gap 123 provides the only channel for the crossbar to enter and exit. The second crossbar 41 enters the assembly slot 121 through the disassembly and assembly gap 123 and is then installed downwards into place. The bottom of the second crossbar 41 contacts the lower wall of the assembly slot 121 to form a support surface. The front wall of the second crossbar 41 is blocked by the stop rib 122, thereby restricting the second crossbar 41 from directly detaching forward.

[0066] In practical applications, the second connecting frame 40 also includes a connecting sleeve, which is fitted onto the second crossbar 41. The second crossbar 41 and the connecting sleeve are rotatably coupled, and both the second crossbar 41 and the connecting sleeve are detachably installed in the assembly groove 121. The second crossbar 41 can rotate relative to the connecting sleeve, facilitating the adjustment of the angle of the chair back body 20. The inner wall and / or end face of the connecting sleeve are coated with a lubricating layer, which reduces the friction between the second crossbar 41 and the connecting sleeve and / or between the connecting sleeve and the second connecting frame 40, thereby reducing noise and resistance during the rotation of the chair back assembly.

[0067] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A seat, characterized in that, include: A chair seat assembly having a first support structure; A chair back assembly, the chair back assembly including a chair back body and a first connecting frame, the first connecting frame being disposed on one side of the chair back body; One of the first support structure and the first connecting frame is provided with a connecting groove, and the other is provided with a connecting structure, wherein the connecting structure is detachably installed in the connecting groove.

2. The seat as described in claim 1, characterized in that, The connecting groove is disposed on the first support structure and has an opening. The first connecting frame is provided with the connecting structure. The connecting structure includes a first crossbar, which is detachably installed in the connecting groove.

3. The seat as described in claim 2, characterized in that, The first crossbar includes a mandrel and a sleeve. The sleeve is fitted onto the mandrel, and the mandrel and the sleeve are rotatably coupled. The sleeve has a through hole that penetrates the top and bottom walls of the sleeve. The two opposite walls of the connecting groove have opposite through holes and connecting holes, and the through holes, through holes, and connecting holes are detachably connected by fasteners.

4. The seat as described in claim 3, characterized in that, The sleeve includes a first shell portion and a second shell portion that are spliced ​​together, and the first shell portion and the second shell portion together encircle the mandrel.

5. The seat as described in claim 3, characterized in that, The connecting groove has a first positioning groove in its wall, and the outer surface of the sleeve has a positioning rib protruding therefrom, which is positioned and engaged with the first positioning groove.

6. The seat as claimed in claim 1, characterized in that, The first connecting frame is provided with an adapter sleeve, the connecting groove is provided in the adapter sleeve and has an opening, the first support structure is provided with the connecting structure, and the connecting structure is detachably inserted into the connecting groove through the opening of the connecting groove.

7. The seat as described in claim 6, characterized in that, The groove wall of the connecting groove is provided with a locking hole. The connecting structure includes a buckle. When the connecting structure is inserted into the connecting groove through the opening of the connecting groove, the buckle is detachably locked into the locking hole. The buckle is exposed through the locking hole so that the buckle can be released from the locking hole after being pressed.

8. The seat as described in claim 6, characterized in that, The connection structure also includes a mandrel, and the adapter sleeve includes a sleeve body and a front cover. The front end of the sleeve body has an installation groove, the mandrel is rotatably installed in the installation groove, and the front cover is connected to the front end of the sleeve body and covers the opening of the installation groove.

9. The seat as claimed in any one of claims 1 to 8, characterized in that, The seat assembly also has a second support structure located below the first support structure; the backrest assembly further includes a second connecting frame connected to one side of the backrest body and located below the first connecting frame, and the second connecting frame is detachably connected to the second support structure.

10. The seat as claimed in claim 9, characterized in that, The second support structure is provided with a front-opening assembly groove, and a stop rib protrudes upward from the lower groove wall of the assembly groove. The end of the stop rib forms a disassembly gap with the upper groove wall of the assembly groove. The second connecting frame has a second crossbar, which is inserted into or removed from the assembly groove through the disassembly gap. The second crossbar abuts against the stop rib and the lower groove wall of the assembly groove within the assembly groove.

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