Dismountable multi-structure round back armchair

Abstract

The present invention belongs to the technical field of furniture, and particularly relates to a dismountable multi-structure round back armchair. The present invention provides a dismountable multi-structure round back armchair, of which the structure comprises an openable backrest frame body that is provided with connection slots in its back surface for arrangement of connection members, and two armrest frame bodies that are respectively connected to two side positions of the openable backrest frame body by means of the connection members. The outstanding advantage of the dismountable multi-structure round back armchair is that: by providing the connection slots in the back surface of the openable backrest frame body, original connection modes, such as screwing and nailing, which allow for relatively great connection strength but cause inconvenience in mounting can be also achieved in the dismountable round back armchair, finally ensuring that the dismountable multi-structure round back armchair has a relatively long effective service life.

Description

A type of detachable multi-structure armchair Technical Field

[0001] This invention belongs to the field of furniture technology, and in particular relates to a detachable multi-structure armchair. Background Technology

[0002] The main structural components of a chair include: seat, backrest, armrests, and legs. A "revolving chair," however, is a relatively special type of chair, generally referring to a chair where the backrest and armrests are integrated.

[0003] Therefore, the most prominent feature of the armchair is its relatively good enclosure and wrapping effect. The gaps that originally existed between the backrest and armrests no longer exist, and items are less likely to fall off at the rear of the armchair.

[0004] On the other hand, based on whether they can be disassembled or assembled, chairs can be broadly categorized into disassembled and modular types. The main advantage of the former is that it is convenient for storage and transportation, and occupies relatively little space during storage and transportation.

[0005] Correspondingly, the main structural problems that need to be solved for modular armchairs are: first, how to achieve greater structural strength, at least ensuring that the structural strength is not much lower than that of integral armchairs; second, how to reduce the difficulty of installation, ensuring that consumers can install them quickly after purchase.

[0006] For example, Chinese utility model patent with authorization announcement number CN217337946U and authorization announcement date of 2022.09.02 discloses a detachable sofa chair, the structure of which includes: a seat frame, a backrest, armrests and a seat cushion. The end face of the backrest and the end face of the armrest are connected by a movable buckle. The seat frame and the backrest and the seat frame and the armrest are fixedly connected by detachable locking parts. The seat cushion covers the top of the seat frame.

[0007] The detachable sofa chair in this utility model patent is essentially a type of armchair. Its advantages are that it is easy to move and transport in batches while maintaining aesthetics.

[0008] However, in actual use, this detachable sofa chair still has at least the following shortcomings, which is also the technical problem that this invention aims to solve:

[0009] For ease of installation, the backrest and armrests can only be installed using a plug-in connection, i.e., the aforementioned movable plug-in fasteners. The biggest drawback of this method is that, compared with methods such as screw connections, the connection strength is relatively low, making it difficult to fully restrict the vertical relative displacement between the backrest and armrests. The plug-in method is more likely to cause the connection structure between the backrest and armrests to loosen, ultimately shortening the effective lifespan of this detachable sofa chair.

[0010] Therefore, in summary, there is an urgent need for a new type of detachable chair product that is easy to install and has a relatively high strength in its installation and connection structure. Summary of the Invention

[0011] This invention provides a detachable multi-structure chair, comprising an openable backrest frame with connecting grooves on its back for mounting connectors, and two armrest frames connected to both sides of the openable backrest frame via the connectors. A key advantage of this detachable multi-structure chair is that the connecting grooves on the back of the openable backrest frame allow for the implementation of connection methods that, while providing relatively high strength, are inconvenient to install, such as screws or nails. Ultimately, this ensures a longer effective service life for the detachable multi-structure chair.

[0012] The technical solution adopted by the present invention to solve the above problems is: a detachable multi-structure armchair, the structure of which includes an openable backrest frame with a connecting groove left on the back for setting connecting parts, and two armrest frames connected to the two sides of the openable backrest frame respectively through the connecting parts.

[0013] A further preferred technical solution is that the openable backrest frame includes a backrest base plate, two backrest side plates respectively disposed at both ends of the backrest base plate, a backrest top plate disposed on the two backrest side plates, mounting holes disposed on the backrest side plates for providing the connectors, and a backrest front end support plate disposed on the backrest base plate, backrest side plates and backrest top plate for forming the connecting groove.

[0014] A further preferred technical solution is that the openable backrest frame also includes a fixed protective sleeve disposed on the backrest side plate, the backrest top plate and the backrest front support plate, and an openable piece disposed on the fixed protective sleeve and used to cover the connecting groove.

[0015] A further preferred technical solution is that the openable backrest frame also includes vertical reinforcing plates disposed on the backrest bottom plate and the backrest top plate, and horizontal reinforcing plates disposed on the two backrest side plates.

[0016] A further preferred technical solution is that: the handrail frame includes a handrail base plate, a front side plate and a rear side plate respectively disposed at both ends of the handrail base plate, a handrail top plate disposed on the front side plate and the rear side plate, and an insert disposed on the rear side plate and connected to the mounting hole via the connector, wherein the connector is a bolt and the insert is an embedded nut.

[0017] A further preferred technical solution is that the structure also includes a front blocking frame and a rear support crossbar respectively set on the two handrail frames, and a seat cushion set on the front blocking frame and the rear support crossbar.

[0018] A further preferred technical solution is that: the front blocking frame includes a vertical plate and two side-slotted locking pieces respectively disposed at both ends of the vertical plate; the handrail frame also includes a front plate with connectors disposed on the handrail base plate and the front side plate and used to support the side-slotted locking pieces.

[0019] A further preferred technical solution is that the handrail frame also includes a rear end plate with an embedded part disposed on the handrail base plate and used to connect the rear end support crossbar.

[0020] A further preferred technical solution is that both the rear support crossbar and the seat cushion are provided with reinforcement holes.

[0021] A further preferred technical solution is that the openable backrest frame also includes Velcro fasteners disposed on the backrest base plate, backrest side plate and openable piece.

[0022] A further preferred technical solution is that the structure also includes legs set on the two armrest frames, and the legs are set inside the openable panel when the detachable multi-structure armchair is stored and transported.

[0023] A further preferred technical solution is that the handrail frame also includes a reinforcing plate disposed on the handrail base plate and the handrail top plate, and used to connect the rear end plate with the embedded part.

[0024] A further preferred technical solution is that the handrail frame also includes a vertical connecting plate disposed on the handrail base plate and the handrail top plate.

[0025] A further preferred technical solution is that the handrail frame also includes a handrail support plate disposed on the handrail base plate, front side plate, rear side plate and handrail top plate.

[0026] A further preferred technical solution is that the openable backrest frame also includes a frame cover for setting the Velcro fasteners.

[0027] A further preferred technical solution is that the handrail frame also includes an integral protective sleeve disposed on the handrail base plate, front side plate, rear side plate, handrail top plate and handrail support plate.

[0028] A further preferred technical solution is that the front-end blocking frame also includes a protruding block disposed on the inner side of the vertical plate and used to support the seat cushion.

[0029] A further preferred technical solution is that: both ends of the rear support crossbar are provided with perforated plates for connecting the rear end plate with the embedded part.

[0030] A further preferred technical solution is that, during storage and transportation, the detachable multi-structure chair has its openable backrest frame, armrest frame, and seat cushion stacked vertically.

[0031] A further preferred technical solution is that the armrest base plate is also provided with the embedded part. Attached Figure Description

[0032] Figure 1 is a schematic diagram of the structure of the present invention.

[0033] Figure 2 is a schematic diagram of the structure of the openable backrest frame in this invention.

[0034] Figure 3 is a schematic diagram of the position and shape of the front support plate of the backrest in this invention from a top view.

[0035] Figure 4 is a schematic diagram showing the position and shape of the openable piece and the Velcro in this invention.

[0036] Figure 5 is a schematic diagram of the handrail frame in this invention.

[0037] Figure 6 is a schematic diagram showing the positions of the front blocking frame and the seat cushion in this invention.

[0038] Figure 7 is a schematic diagram of the position of the rear support crossbar in this invention from a top view.

[0039] Figure 8 is a schematic diagram of the position and shape of the side-grooved snap-fit ​​piece in this invention.

[0040] Figure 9 is a schematic diagram showing the position and shape of the front plate with connector and the rear plate with insert in this invention.

[0041] Figure 10 is a schematic diagram of the position and shape of the reinforcing hole and the perforated plate in this invention from a top view.

[0042] Figure 11 is a schematic diagram showing the location of the reinforcement holes on the seat cushion in this invention.

[0043] Figure 12 is a schematic diagram of the shape of the handrail support plate in this invention.

[0044] Figure 13 is a schematic diagram of the position and shape of the overall protective sleeve in this invention.

[0045] Figure 14 is a schematic diagram of the function of the protrusion in this invention.

[0046] Figure 15 is a schematic diagram of the front-end blocking frame in this invention.

[0047] Figure 16 is a schematic diagram of the storage and transportation status of the detachable multi-structure armchair of the present invention.

[0048] Figure 17 is a schematic diagram of the storage position of the legs in the detachable multi-structure armchair of the present invention during storage and transportation.

[0049] The meanings of the markings in the diagram are as follows:

[0050] Packaging box a;

[0051] 1. Connector; 2. Openable backrest frame; 3. Armrest frame; 4. Front blocking frame; 5. Rear support crossbar; 6. Seat cushion; 7. Reinforcing hole; 8. Support leg; 9. Perforated plate.

[0052] Backrest base plate 201, backrest side plate 202, backrest top plate 203, mounting hole 204, backrest front support plate 205, fixed protective sleeve 206, openable piece 207, vertical reinforcement plate 208, horizontal reinforcement plate 209, nylon hook and loop fastener 210, frame cover cloth 211.

[0053] Handrail base plate 301, front side plate 302, rear side plate 303, handrail top plate 304, embedded part 305, front plate with connector 306, rear plate with embedded part 307, reinforcing plate 308, vertical connecting plate 309, handrail support plate 310, overall protective sleeve 311;

[0054] Vertical plate 401, side slotted snap-fit ​​piece 402, protruding block 403. Detailed Implementation

[0055] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0056] As shown in Figures 1-17, a detachable multi-structure armchair includes an openable backrest frame 2 with a connecting groove on the back for mounting a connector 1, and two armrest frames 3 connected to both sides of the openable backrest frame 2 via the connector 1.

[0057] In this embodiment, the openable backrest frame 2 replaces the commonly used "one-piece panel" structure with a "slotted" structure. Therefore, the internally installed connector 1 can be connected to the armrest frame 3.

[0058] Otherwise, the backrest and armrests can only be connected on opposite sides, which is not strong enough.

[0059] The main materials of the openable backrest frame 2 and armrest frame 3 are both wood, and soft upholstery materials can be added on them as needed to realize the basic function of the chair.

[0060] Furthermore, the aforementioned connecting groove refers to the operating position for installing and removing the connecting piece 1. This position is shaped as a rectangular groove with an opening on only one side, which is the back of the chair.

[0061] Finally, the connector 1 is essentially a hardware component, and there are at least four of them, which are installed in pairs at the mounting positions on both sides of the openable backrest frame 2.

[0062] The openable backrest frame 2 includes a backrest base plate 201, two backrest side plates 202 respectively disposed at both ends of the backrest base plate 201, a backrest top plate 203 disposed on the two backrest side plates 202, mounting holes 204 disposed on the backrest side plates 202 and used for setting the connector 1, and a backrest front end support plate 205 disposed on the backrest base plate 201, backrest side plates 202 and backrest top plate 203 and used to form the connecting groove.

[0063] In this embodiment, both the backrest bottom plate 201 and the backrest top plate 203 have a certain curvature, and both can be fan-shaped annular plates. The shorter arc edge of the fan-shaped annular plate is the front end of the chair, while the longer arc edge is the rear end of the chair.

[0064] In addition, the backrest bottom plate 201, the two backrest side plates 202 and the backrest top plate 203 are connected in sequence by nail guns, and triangular reinforcement plates can be set at the included angles between each pair as needed.

[0065] The direct "support" of the front support plate 205 of the backrest is the soft upholstery material on the backrest, and the final "support" is the user. It is formed by bending a rectangular plate and is connected to the backrest frame composed of the backrest bottom plate 201, two backrest side plates 202 and backrest top plate 203 by nail gun.

[0066] Finally, the front support plate 205 of the backrest can also be made of multiple irregular thin plates spliced ​​together, and its thickness is smaller than that of the bottom plate 201, the two side plates 202 and the top plate 203 of the backrest.

[0067] The openable backrest frame 2 also includes a fixed protective sleeve 206 disposed on the backrest side plate 202, the backrest top plate 203 and the backrest front support plate 205, and an openable piece 207 disposed on the fixed protective sleeve 206 and used to cover the connecting groove.

[0068] In this embodiment, the fixed protective sleeve 206 and the openable piece 207 together form a sleeve with an opening only at the bottom, with the fixed protective sleeve 206 in front and the openable piece 207 at the back.

[0069] The fixed protective sleeve 206 is filled with elastic materials such as sponge, and the surface materials and colors of both are the same, as are the surface materials and colors of the armrest frame 3. For example, it can be white or yellow velvet, thus giving the armrest a soft surface and a uniform appearance.

[0070] In addition, the openable piece 207 is rectangular in shape, with its upper edge fixedly connected to the fixed protective sleeve 206, and its lower edge and two sides movably connected to the fixed protective sleeve 206. The movable connection can be a zipper connection.

[0071] Thus, when the connector 1 is disassembled, the openable piece 207 can be temporarily opened and lifted. When the chair is in normal use, the openable piece 207 is lowered and connected to the fixed protective sleeve 206, thereby sealing the connecting groove and improving the overall appearance of the chair.

[0072] The openable backrest frame 2 also includes vertical reinforcing plates 208 disposed on the backrest bottom plate 201 and the backrest top plate 203, and horizontal reinforcing plates 209 disposed on the two backrest side plates 202.

[0073] In this embodiment, at least one of the vertical reinforcing plate 208 and the horizontal reinforcing plate 209 directly supports the front support plate 205 of the backrest, ensuring that the user cannot easily break the front support plate 205 of the backrest.

[0074] The number of vertical reinforcing plates 208 and horizontal reinforcing plates 209 is not specifically limited. For example, it can be 1 vertical reinforcing plate 208 and 2 horizontal reinforcing plates 209.

[0075] The horizontal reinforcing plate 209 has an arc that cooperates with the front support plate 205 of the backrest. At least one of the vertical reinforcing plate 208 and the horizontal reinforcing plate 209 has a locking slot, so that after the vertical reinforcing plate 208 and the horizontal reinforcing plate 209 are connected, they together support the front support plate 205 of the backrest and reinforce the entire openable backrest frame 2 as a whole structure.

[0076] The handrail frame 3 includes a handrail base plate 301, a front side plate 302 and a rear side plate 303 respectively disposed at both ends of the handrail base plate 301, a handrail top plate 304 disposed on the front side plate 302 and the rear side plate 303, and an insert 305 disposed on the rear side plate 303 and connected to the mounting hole 204 via the connector 1.

[0077] In this embodiment, the materials, connection methods, soft padding materials and methods of the armrest frame 3 are the same as those of the openable backrest frame 2.

[0078] The front side panel 302 is shorter than the rear side panel 303. The armrest top panel 304 is both bent and tilted. The bending serves to transitionally connect the openable backrest frame 2, and the tilting serves to correspond to the user's arm placement posture.

[0079] Furthermore, the position and number of the inserts 305 correspond to those of the connectors 1.

[0080] The structure also includes a front blocking frame 4 and a rear support crossbar 5 respectively set on the two handrail frame bodies 3 at both ends, and a seat cushion 6 set on the front blocking frame 4 and the rear support crossbar 5.

[0081] In this embodiment, the functions of the front blocking frame 4 mainly include: first, reinforcing the connection between the two armrest frames 3; second, supporting the seat cushion 6 together with the rear support crossbar 5; and third, blocking the space under the seat cushion of the chair to improve the overall appearance of the chair.

[0082] The rear support crossbar 5 can be a simple round bar, with both ends inserted into the armrest frame 3. The seat cushion 6 can be a common commercially available product, and its structure can consist of a hard base plate and an upper soft padding material.

[0083] The front blocking frame 4 includes a vertical plate 401 and two side slotted latching pieces 402 respectively disposed at both ends of the vertical plate 401; the handrail frame 3 also includes a front end plate 306 with connectors disposed on the handrail base plate 301 and the front side plate 302 and used to support the side slotted latching pieces 402.

[0084] In this embodiment, the groove of the side slotted latching piece 402 is a right-angled trapezoid and the groove is tilted downwards to ensure that the connection between the front blocking frame 4 and the handrail frame 3 can be more stable after the front blocking frame 4 is compressed.

[0085] The front blocking frame 4, the openable backrest frame 2, the armrest frame 3, and the seat cushion 6 can all be made of the same soft-pack material and color, which can significantly improve the comfort and overall appearance of the chair.

[0086] Finally, the structure of the front end plate 306 with connector is as follows: the insert 305 and connector 1 are installed on the rectangular plate, and the connector 1 protrudes inward to engage and support the side slotted engaging piece 402.

[0087] The handrail frame 3 also includes a rear end plate 307 with an insert, which is disposed on the handrail base plate 301 and used to connect the rear end support crossbar 5.

[0088] In this embodiment, the structure of the rear end plate 307 with the embedded part is as follows: the embedded part 305 is installed on the rectangular plate, and the two ends of the rear end support crossbar 5 are respectively connected to the two embedded parts 305, so that the rear end support crossbar 5 is stably supported in the vertical direction.

[0089] The rear end plate 307 with the insert can be further enlarged to connect to the rear end side plate 303 for self-reinforcement, while the front end plate 306 with the connector is positioned further forward and can be directly connected to the front end side plate 302. All of the above connection methods are nail gun connections.

[0090] Both the rear support crossbar 5 and the seat cushion 6 are provided with reinforcement holes 7.

[0091] In this embodiment, the reinforcing hole 7 on the seat cushion 6 is a threaded hole, and the reinforcing hole 7 on the rear support crossbar 5 may or may not be threaded.

[0092] Finally, the pair of reinforcing holes 7 are used in conjunction with bolts, which makes the seat cushion 6, which was originally placed directly, less likely to fall off.

[0093] The openable backrest frame 2 also includes Velcro 210s disposed on the backrest base plate 201, backrest side plate 202 and openable piece 207.

[0094] In this embodiment, the Velcro 210 is a commercially available product. A portion of its two-piece structure is disposed on the openable piece 207, ensuring that the openable piece 207 is fully bonded when the chair is in normal use, so that the connecting groove is not exposed.

[0095] Both Velcro and zipper connections have their own advantages and disadvantages, and one can be chosen to use either one.

[0096] The structure also includes legs 8 mounted on the two handrail frames 3.

[0097] In this embodiment, there are four support legs 8, which are arranged in pairs on the two handrail frames 3 and screwed to the handrail base plate 301.

[0098] When storing and transporting the detachable multi-structure armchair, the support legs 8 are located inside the openable panel 207.

[0099] In this embodiment, the inner side of the openable panel 207 of the chair remains hollow during storage, transportation, and use, allowing it to accommodate all the legs 8. This eliminates the hassle of selecting an insertion location for the legs 8 within the packaging box, which is highly practical.

[0100] The handrail frame 3 also includes a reinforcing plate 308 disposed on the handrail base plate 301 and the handrail top plate 304, and used to connect the rear end plate 307 with embedded parts.

[0101] In this embodiment, there are two reinforcing plates 308, located on both sides of the rear end plate 307 with embedded parts, and connected to it by nail guns, or nail guns and triangular reinforcing blocks, so that the size of the rear end plate 307 with embedded parts does not need to be large and does not need to be connected to the rear side plate 303.

[0102] In addition, the reinforcing plate 308 can further support and reinforce the handrail top plate 304.

[0103] The handrail frame 3 also includes a vertical connecting plate 309 disposed on the handrail base plate 301 and the handrail top plate 304.

[0104] In this embodiment, there are 1-2 vertical connecting plates 309, which at least support the top plate 304 of the handrail, thereby reinforcing the entire handrail frame 3.

[0105] The vertical connecting plate 309 is not connected to the rear end plate 307 with the embedded part, but it can be connected to the front end plate 306 with the connector, so that the front end of the front end plate 306 with the connector is the front side plate 302 and the rear end is the vertical connecting plate 309, thereby reinforcing the front end plate 306 with the connector.

[0106] The handrail frame 3 also includes a handrail support plate 310 disposed on the handrail base plate 301, the front side plate 302, the rear side plate 303 and the handrail top plate 304.

[0107] In this embodiment, the material, function, and connection method of the armrest support plate 310 are the same as those of the backrest front support plate 205.

[0108] However, the backrest front support plate 205 is relatively necessary compared to the armrest support plate 310, while the latter can be omitted, because the user's arms generally do not need to be supported by the armrest support plate 310, but are placed directly on the armrest top plate 304.

[0109] The openable backrest frame 2 also includes a frame cover 211 for mounting the Velcro 210.

[0110] In this embodiment, the armrest frame 3 can also be covered with the same material and installed using the same method. The cover is black and made of non-woven fabric. Its main function is to completely cover the wooden frame structure of both the openable backrest frame 2 and the armrest frame 3, so that even if wood chips fall from the board, they will not fall outside the cover, thereby improving the comfort of the chair.

[0111] In addition, the tarpaulin covering the frame, like the aforementioned Velcro and zippers, is secured to the wooden frame structure with nails.

[0112] The handrail frame 3 also includes an integral protective sleeve 311 installed on the handrail base plate 301, front side plate 302, rear side plate 303, handrail top plate 304 and handrail support plate 310.

[0113] In this embodiment, the color, material, internal material, and connection method of the overall protective sleeve 311 are the same as those of the fixed protective sleeve 206. The structural essence of the overall protective sleeve 311 is the combination of the fixed protective sleeve 206 and the openable piece 207. The combination of the two structures is connected together and cannot be opened. The shape is a sleeve with only an opening at the bottom.

[0114] Of course, the overall protective sleeve 311 may have openings and gaps before it is fitted onto the handrail frame 3. After the overall protective sleeve 311 is fitted downwards and covers the entire handrail frame 3, the gaps are first joined together and then fixed with nails to form a relatively complete sleeve structure.

[0115] The front blocking frame 4 also includes a protruding block 403 disposed on the inner side of the vertical plate 401 and used to support the seat cushion 6.

[0116] In this embodiment, one of the functions of the protrusion 403 is to provide an additional option for the support position of the seat cushion 6. The seat cushion 6 can choose to press on the protrusion 403 or on the vertical plate 401.

[0117] In addition, the second function of the protruding block 403 is to upgrade the original single-panel front blocking frame 4 into a combined panel frame structure, making the front blocking frame 4 more difficult to break.

[0118] Both ends of the rear support crossbar 5 are provided with perforated plates 9 for connecting the rear end plate 307 with the embedded part.

[0119] In this embodiment, the perforated plate 9, in conjunction with the aforementioned connector 1, can be effectively connected at the rear end plate 307 with the embedded part.

[0120] The rear support crossbar 5 and the two perforated plates 9 are integrally formed and are made of high-strength steel. The number and position of the openings on a single perforated plate 9 correspond to the number and position of the inserts on a single rear end plate 307 with inserts.

[0121] When storing and transporting the detachable multi-structure chair, the openable backrest frame 2, armrest frame 3, and seat cushion 6 are stacked vertically.

[0122] In this embodiment, the main advantages of this chair include the following two:

[0123] First, the opening backrest frame 2 and the armrest frame 3 can be connected by an internal connection method that cannot be used in the prior art, which makes the connection stronger.

[0124] Secondly, the structure of the chair is divided into four parts, including one openable backrest frame 2, two armrest frames 3, and one seat cushion 6. Compared with the method of assembling the chair in the factory and then packaging and shipping it, the packaging volume can be greatly reduced.

[0125] For example, the required packaging box dimensions for a certain model of chair, if assembled first and then packaged for shipment, are 69cm × 63cm × 59cm. However, if the chair is disassembled and then stacked vertically as described above, the required packaging box dimensions are 57cm × 54cm × 43.5cm. Therefore, the advantage of saving packaging volume is quite obvious.

[0126] Furthermore, the connector 1, the front blocking frame 4, and the rear support crossbar 5 can be inserted into the gaps in the packaging box without increasing the size of the packaging box.

[0127] The armrest base plate 301 is also provided with the embedded part 305.

[0128] In this embodiment, the connecting member is provided on the support leg 8, so that it can be fully installed and fixed on the insert 305.

[0129] The connector 1 is a bolt, and the insert 305 is an insert nut.

[0130] In this embodiment, the connector 1 can also be a nail, in which case the insert 305 is a wooden or rubber block with relatively strong nail-holding force. The insert nut is a commercially available product, and its structure is essentially a double-threaded nut with internal and external threads. The external thread is used for self-screwing and installation, and the internal thread is used for connecting the aforementioned bolt.

[0131] Thus, the chair in this embodiment adopts the openable backrest frame 2 with a connection slot on the back, which makes the screw and nail joints, which are difficult to use in ordinary chair disassembly, relatively simple and efficient. The connection strength and stability of the screw and nail joints are far superior to those of the plug-in joints.

[0132] In other words, the plug-in method is a compromise made by existing ordinary disassembled chairs when choosing a connection method.

[0133] Furthermore, the aforementioned "multi-structure" designation refers to the composition of the chair, which mainly includes the following four structural units: one openable backrest frame 2, two armrest frames 3, and one seat cushion 6. More importantly, if the chair were a single unit, its packing volume would be relatively large. However, by disassembling and then packing it, as shown in Figure 16, the packing volume can be greatly reduced.

[0134] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of the present invention. These are non-inventive modifications and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A detachable multi-structure armchair, characterized in that: The structure includes an openable backrest frame (2) with a connecting groove on the back for mounting a connector (1), and two armrest frames (3) connected to the two sides of the openable backrest frame (2) via the connector (1).

2. The detachable multi-structure armchair according to claim 1, characterized in that: The openable backrest frame (2) includes a backrest base plate (201), two backrest side plates (202) respectively disposed at both ends of the backrest base plate (201), a backrest top plate (203) disposed on the two backrest side plates (202), mounting holes (204) disposed on the backrest side plates (202) and used for setting the connector (1), and a backrest front end support plate (205) disposed on the backrest base plate (201), backrest side plates (202) and backrest top plate (203) and used to form the connecting groove.

3. A detachable multi-structure armchair according to claim 2, characterized in that: The openable backrest frame (2) also includes a fixed protective sleeve (206) disposed on the backrest side plate (202), the backrest top plate (203) and the backrest front support plate (205), and an openable piece (207) disposed on the fixed protective sleeve (206) and used to cover the connecting groove.

4. A detachable multi-structure armchair according to claim 2, characterized in that: The openable backrest frame (2) also includes vertical reinforcing plates (208) provided on the backrest bottom plate (201) and backrest top plate (203), and horizontal reinforcing plates (209) provided on the two backrest side plates (202).

5. A detachable multi-structure armchair according to claim 2, characterized in that: The handrail frame (3) includes a handrail base plate (301), a front side plate (302) and a rear side plate (303) respectively disposed at both ends of the handrail base plate (301), a handrail top plate (304) disposed on the front side plate (302) and the rear side plate (303), and an insert (305) disposed on the rear side plate (303), which is connected to the mounting hole (204) via the connector (1). The connector (1) is a bolt, and the insert (305) is an insert nut.

6. A detachable multi-structure armchair according to claim 5, characterized in that: The structure also includes a front blocking frame (4) and a rear support crossbar (5) respectively set on the two handrail frames (3), and a seat cushion (6) set on the front blocking frame (4) and the rear support crossbar (5).

7. A detachable multi-structure armchair according to claim 6, characterized in that: The front blocking frame (4) includes a vertical plate (401) and two side slotted latching pieces (402) respectively disposed at both ends of the vertical plate (401); the handrail frame (3) also includes a front end plate (306) with connectors disposed on the handrail base plate (301) and the front end side plate (302) and used to support the side slotted latching pieces (402).

8. A detachable multi-structure armchair according to claim 6, characterized in that: The handrail frame (3) also includes a rear end plate (307) with an insert, which is disposed on the handrail base plate (301) and used to connect the rear end support crossbar (5).

9. A detachable multi-structure armchair according to claim 6, characterized in that: The rear support crossbar (5) and the seat cushion (6) are both provided with reinforcement holes (7).

10. A detachable multi-structure armchair according to claim 3, characterized in that: The openable backrest frame (2) also includes Velcro (210) on the backrest base plate (201), backrest side plate (202) and openable piece (207).

11. A detachable multi-structure armchair according to claim 3, characterized in that: The structure also includes legs (8) set on the two armrest frames (3), and the legs (8) are set inside the openable piece (207) when the detachable multi-structure armchair is stored and transported.

12. A detachable multi-structure armchair according to claim 8, characterized in that: The handrail frame (3) also includes a reinforcing plate (308) disposed on the handrail base plate (301) and the handrail top plate (304) and used to connect the rear end plate (307) with the embedded part.

13. A detachable multi-structure armchair according to claim 5, characterized in that: The handrail frame (3) also includes a vertical connecting plate (309) disposed on the handrail base plate (301) and the handrail top plate (304).

14. A detachable multi-structure armchair according to claim 5, characterized in that: The handrail frame (3) also includes a handrail support plate (310) disposed on the handrail base plate (301), the front side plate (302), the rear side plate (303) and the handrail top plate (304).

15. A detachable multi-structure armchair according to claim 10, characterized in that: The openable backrest frame (2) also includes a frame cover (211) for setting the Velcro (210).

16. A detachable multi-structure armchair according to claim 15, characterized in that: The handrail frame (3) also includes an integral protective sleeve (311) installed on the handrail base plate (301), front side plate (302), rear side plate (303), handrail top plate (304) and handrail support plate (310).

17. A detachable multi-structure armchair according to claim 7, characterized in that: The front blocking frame (4) also includes a protrusion (403) disposed on the inner side of the vertical plate (401) and used to support the seat cushion (6).

18. A detachable multi-structure armchair according to claim 8, characterized in that: Both ends of the rear support crossbar (5) are provided with perforated plates (9) for connecting the rear end plate (307) with the insert.

19. A detachable multi-structure armchair according to claim 6, characterized in that: When storing and transporting the detachable multi-structure chair, the openable backrest frame (2), armrest frame (3) and seat cushion (6) are stacked vertically.

20. A detachable multi-structure armchair according to claim 5, characterized in that: The armrest base plate (301) is also provided with the embedded part (305).

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