A sofa

Abstract

The application discloses a sofa, and relates to the technical field of furniture. The sofa comprises a sofa body, a backrest, a first connecting arm and a second connecting arm. The first connecting arm is provided with a plug-in groove and a first locking piece. The second connecting arm is inserted into the plug-in groove and is in plug-in connection with the first connecting arm. The second connecting arm is provided with a second locking piece matched with the first locking piece. When the second connecting arm is inserted into the plug-in groove, the first locking piece is in detachable connection with the second locking piece. One of the first connecting arm and the second connecting arm is connected to the sofa body, and the other is connected to the backrest. The sofa provided by the application can realize detachable connection of the sofa body and the backrest, and can reduce the occupied space of the whole sofa during storage and transportation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furniture, in particular to a sofa. BACKGROUND

[0002] The sofa is a common furniture in home, office and other places, which can provide a more comfortable sitting and lying environment for users.

[0003] However, the existing sofa needs to occupy a large space during storage and transportation, causing space waste. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a sofa to realize the detachable connection of the sofa body and the backrest, and reduce the occupied space of the sofa during storage and transportation.

[0005] The present application provides a sofa, which comprises a sofa body, a backrest, a first connecting arm and a second connecting arm.

[0006] The first connecting arm is provided with a plug-in groove and a first locking member, the second connecting arm is inserted into the plug-in groove and is detachably connected with the first connecting arm, and the second connecting arm is provided with a second locking member matched with the first locking member.

[0007] One of the first connecting arm and the second connecting arm is connected to the sofa body, and the other is connected to the backrest.

[0008] In some possible embodiments, the first connecting arm further comprises a connecting arm body, and the plug-in groove is formed in the connecting arm body.

[0009] The first locking member comprises a connecting portion and an elastic arm connected with each other, the connecting portion is connected to the connecting arm body, the elastic arm is arranged on one side of the plug-in groove, the elastic arm is provided with a locking protrusion on the side facing the plug-in groove, and the locking protrusion is inserted into the plug-in groove.

[0010] The second locking member comprises a slot hole structure formed on the second connecting arm, and when the second connecting arm is inserted into the plug-in groove, the locking protrusion is inserted into the slot hole structure.

[0011] In some possible embodiments, the side of the elastic arm away from the plug-in groove is further provided with a hand holding portion, and the hand holding portion is located at the end of the locking protrusion away from the connecting portion.

[0012] In some possible embodiments, the connecting arm body is provided with two spaced-apart limiting edges on the side facing the elastic arm.

[0013] When the second connecting arm is inserted into the insertion slot, the limiting edge abuts against one side of the second connecting arm facing the elastic arm;

[0014] The locking protrusion is inserted into the slot structure between the two limiting edges.

[0015] In some possible embodiments, the first connecting arm is connected to the backrest;

[0016] The sofa further comprises an adjusting mechanism, the adjusting mechanism comprising a positioning assembly and the second connecting arm, one end of the second connecting arm being rotatably connected to the sofa body, and the other end of the second connecting arm away from the sofa body being removably connected to the first connecting arm;

[0017] The positioning assembly is arranged on the side of the second connecting arm away from the first connecting arm, the end of the second connecting arm facing the positioning assembly being provided with a plurality of positioning grooves, the plurality of positioning grooves being arranged around the rotation axis of the second connecting arm, and the positioning assembly being selectively inserted into one of the positioning grooves.

[0018] In some possible embodiments, the second connecting arm comprises an insertion portion and a rotating portion, the rotating portion comprising two oppositely arranged wall plates, the end of each of the two wall plates facing the positioning assembly being provided with the plurality of positioning grooves, and the positioning assembly being simultaneously inserted into the positioning grooves on the two wall plates;

[0019] The insertion portion is connected to the end of one of the wall plates away from the positioning assembly, and the insertion portion is removably connected to the first connecting arm.

[0020] In some possible embodiments, the positioning assembly comprises a positioning member and an elastic member, one end of the positioning member being rotatably connected to the sofa body, and the other end of the positioning member being selectively inserted into the positioning groove;

[0021] One end of the elastic member acts on the positioning member, and the other end of the elastic member acts on the sofa body, the included angle α between the backrest and the sofa body being in a minimum value when the elastic member is in a twisted state or a natural state.

[0022] In some possible embodiments, the adjusting mechanism further comprises a mounting seat, the mounting seat being fixedly mounted on the sofa body, and the second connecting arm and the positioning assembly being connected to the sofa body through the mounting seat.

[0023] The mounting base has a bottom close to the sofa body, and an included angle a between the backrest and the sofa body, when the included angle a is at a maximum, the second connecting arm abuts against a side of the bottom away from the sofa body.

[0024] In some possible implementation manners, the adjusting mechanism further comprises a limiting assembly, and when the included angle a between the backrest and the sofa body is at a minimum, the limiting assembly abuts against a side of the positioning assembly away from the second connecting arm.

[0025] In some possible implementation manners, the limiting assembly comprises a first limiting piece and a second limiting piece, the first limiting piece is rotationally connected to the second connecting arm, and the second limiting piece is connected to the second connecting arm, and the second limiting piece is located at a side of the first limiting piece away from the positioning assembly.

[0026] An end of the first limiting piece towards the positioning assembly is located at a side of the positioning assembly away from the sofa body, and the positioning assembly is located on a rotation path of the end of the first limiting piece.

[0027] An end of the first limiting piece away from the positioning assembly is located at a side of the second limiting piece away from the sofa body, and the second limiting piece is located on a rotation path of the end of the first limiting piece.

[0028] Advantages of the present application: the sofa provided by the present application can realize detachable connection between the sofa body and the backrest through the pluggable connection between the first connecting arm and the second connecting arm. When the sofa needs to be transported, the backrest can be detached from the sofa body. Thus, the volume of the sofa as a whole can be reduced, the space occupation can be reduced, and the logistics transportation and storage can be facilitated.

[0029] In addition, when the second connecting arm is inserted into the insertion groove of the first connecting arm, the first locking piece and the second locking piece can be matched to realize the locking between the first connecting arm and the second connecting arm, the possibility of the backrest moving randomly relative to the sofa body can be reduced, the possibility of the backrest detaching from the sofa body randomly can be reduced, and the reliability and stability of the backrest and the sofa body after assembly can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1Fig. 1 shows a perspective view of a sofa in some embodiments;

[0032] Figure 2 Fig. 2 shows an exploded view of the sofa in some embodiments;

[0033] Figure 3 Fig. 3 shows a side view of the sofa in some embodiments;

[0034] Figure 4 Fig. 4 shows a view of a connection between the sofa body and the backrest in some embodiments;

[0035] Figure 5 Fig. 5 shows another view of a connection between the sofa body and the backrest in some embodiments;

[0036] Figure 6 Fig. 6 shows a partial view of a connection between the sofa body and the backrest in some embodiments;

[0037] Figure 7 Fig. 7 shows a view of the sofa in a use state in some embodiments;

[0038] Figure 8 Fig. 8 shows another view of the sofa in a use state in some embodiments.

[0039] Explanation of main element symbols:

[0040] 110 - sofa body; 120 - backrest; 1201 - first end; 1202 - second end; 121 - backrest body; 122 - connecting plate;

[0041] 200 - first connecting arm; 210 - connecting arm body; 211 - insertion groove; 212 - opening; 213 - limiting rim; 220 - first locking member; 221 - connecting portion; 222 - elastic arm; 2221 - locking protrusion; 2222 - hand holding portion;

[0042] 300 - adjusting mechanism; 310 - second connecting arm; 311 - insertion portion; 3111 - second locking member; 312 - rotating portion; 3121 - wall plate; 31211 - positioning groove; 31212 - positioning tooth; 320 - mounting seat; 321 - bottom portion; 331 - first rotating shaft; 332 - second rotating shaft; 340 - positioning assembly; 341 - positioning member; 342 - elastic member; 350 - limiting assembly; 351 - first limiting member; 352 - second limiting member;

[0043] M - first adjusting direction; N - second adjusting direction. DETAILED DESCRIPTION

[0044] Embodiments of the present application are described below in detail with reference to examples shown in the drawings, wherein the same or similar numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are merely intended to explain the present application, and are not to be understood as limiting the present application.

[0045] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0047] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] As Figures 1 to 4As shown, the sofa provided in the embodiment can include a sofa body 110, a backrest 120, a first connecting arm 200 and a second connecting arm 310. Among them, the sofa body 110 and the backrest 120 can constitute the main structure of the sofa.

[0050] In the embodiment, the first connecting arm 200 can be provided with a plug-in groove 211, and the second connecting arm 310 can be inserted into the plug-in groove 211 and can be plug-in arranged relative to the first connecting arm 200. That is, the first connecting arm 200 and the second connecting arm 310 can be plug-in connected. In addition, the first connecting arm 200 can be provided with a first locking piece 220. The second connecting arm 310 can be provided with a second locking piece 3111 matched with the first locking piece 220. When the second connecting arm 310 is inserted into the plug-in groove 211 of the first connecting arm 200, the first locking piece 220 and the second locking piece 3111 can be detachably connected. In the embodiment, one of the first connecting arm 200 and the second connecting arm 310 can be connected to the sofa body 110, and the other can be connected to the backrest 120.

[0051] In some embodiments, the first connecting arm 200 can be connected to the backrest 120. The second connecting arm 310 can be connected to the sofa body 110.

[0052] In other embodiments, the first connecting arm 200 can be connected to the sofa body 110, and the second connecting arm 310 can be connected to the backrest 120.

[0053] The sofa provided in the embodiment can realize the detachable connection between the sofa body 110 and the backrest 120 through the plug-in connection between the first connecting arm 200 and the second connecting arm 310. When the sofa needs to be transported, the backrest 120 can be detached from the sofa body 110. Thus, the overall packaging size of the sofa can be reduced, facilitating logistics transportation and storage.

[0054] In addition, when the second connecting arm 310 is inserted into the plug-in groove 211 of the first connecting arm 200, the first locking piece 220 and the second locking piece 3111 can cooperate to realize the locking between the first connecting arm 200 and the second connecting arm 310. Thus, the possibility of the first connecting arm 200 moving randomly relative to the second connecting arm 310 can be reduced, and the probability of the first connecting arm 200 randomly detaching from the second connecting arm 310 can be reduced. That is, the possibility of the backrest 120 moving randomly relative to the sofa body 110 can be reduced, and the possibility of the backrest 120 randomly detaching from the sofa body 110 can be reduced, improving the reliability and stability of the backrest 120 and the sofa body 110 after assembly.

[0055] As Figures 1 to 3As shown, the backrest 120 can have a first end 1201 and a second end 1202 distributed along the height direction of the backrest 120. When the backrest 120 is connected to the sofa body 110, the first end 1201 can be arranged close to the sofa body 110.

[0056] In some embodiments, the backrest 120 can include an integrated backrest body 121 and two connecting plates 122. The two connecting plates 122 can be arranged at the positions of the two side edges of the backrest body 121 in the length direction of the sofa and arranged opposite to each other. In addition, the connecting plates 122 can be arranged close to the first end 1201. In addition, the connecting plates 122 can be perpendicular to the backrest body 121. In embodiments, the first connecting arm 200 and the second connecting arm 310 are arranged in two groups, and the two first connecting arms 200 can be connected to the sides of the two connecting plates 122 close to each other one by one.

[0057] As shown in FIGS. 1, 2 and 3, Figure 1 , Figure 3 and Figure 4 In some embodiments, the first connecting arm 200 further includes a connecting arm body 210. The connecting arm body 210 can be fixedly connected to the connecting plate 122 by screwing or welding, etc. An insertion slot 211 can be formed on the side of the connecting arm body 210 away from the connecting plate 122. In some embodiments, the connecting arm body 210 can be made of a metal plate, and the insertion slot 211 can be formed by bending the connecting arm body 210. One end of the insertion slot 211 towards the first end 1201 of the backrest 120 can be provided with an opening 212. When the second connecting arm 310 is insertedly connected to the first connecting arm 200, the second connecting arm 310 can be inserted into the insertion slot 211 from the opening 212.

[0058] In addition, the side of the connecting arm body 210 away from the connecting plate 122 is further provided with two spaced-apart limiting edges 213, and the extending direction of the limiting edges 213 can be arranged along the extending direction of the insertion slot 211. When the second connecting arm 310 is inserted into the insertion slot 211, the limiting edges 213 can be located on the side of the second connecting arm 310 away from the connecting plate 122, which can prevent the second connecting arm 310 from being separated from the side of the insertion slot 211 away from the connecting plate 122, so as to improve the connection stability of the first connecting arm 200 and the second connecting arm 310.

[0059] As shown in FIGS. 1, 2 and 3, Figures 3 to 5 In some embodiments, the first locking member 220 can also be made of a metal plate and can have a certain elasticity. The first locking member 220 can include an integrated connecting portion 221 and an elastic arm 222. The connecting portion 221 can be fixedly connected to one end of the connecting arm body 210 away from the opening 212 by welding, screwing or clamping, etc.

[0060] In this embodiment, the elastic arms 222 may be arranged side-by-side on the side of the limiting edge 213 away from the mating groove 211. A locking protrusion 2221 may protrude from the side of the elastic arm 222 facing the mating groove 211. In some embodiments, the locking protrusion 2221 may be formed by bending the elastic arm 222. The locking protrusion 2221 may pass between the two limiting edges 213 and be inserted into the mating groove 211.

[0061] In some embodiments, the second locking member 3111 may be a slot structure formed on the second connecting arm 310. When the second connecting arm 310 is inserted into the mating groove 211, the locking protrusion 2221 may be inserted into the slot structure to lock the position between the first connecting arm 200 and the second connecting arm 310.

[0062] In addition, a handle 2222 protrudes from the side of the elastic arm 222 away from the insertion slot 211. The handle 2222 can be located at the end of the locking protrusion 2221 away from the connecting part 221. When it is necessary to unlock the second connecting arm 310 and the first connecting arm 200, the handle 2222 can be pulled to move the locking protrusion 2221 away from the slot structure, so that the locking protrusion 2221 disengages from the slot structure, thereby unlocking the second connecting arm 310 and the first connecting arm 200. In this way, the backrest 120 can be easily removed from the sofa body 110.

[0063] In other embodiments, the locking protrusion 2221 may also be a spring-loaded structure.

[0064] In other embodiments, the first connecting arm 200 and the second connecting arm 310 can also be locked together by bolts and nuts.

[0065] like Figure 1 , Figure 3 , Figures 6 to 8 As shown, the sofa also includes an adjustment mechanism 300. The adjustment mechanism 300 may include a mounting base 320 and a second connecting arm 310 connected to the sofa body 110, i.e., the second connecting arm 310 may be part of the adjustment mechanism 300. In some embodiments, the mounting base 320 may have a U-shaped structure. The mounting base 320 may be fixedly connected to the sofa body 110 by means of screw connection or welding.

[0066] In this embodiment, one end of the second connecting arm 310 can be inserted into the mounting base 320 and rotatably connected to the mounting base 320 via the first rotating shaft 331. That is, the second connecting arm 310 can be indirectly connected to the sofa body 110 via the mounting base 320. The end of the second connecting arm 310 away from the mounting base 320 can be plugged into and unplugged from the first connecting arm 200. When the second connecting arm 310 rotates relative to the mounting base 320, the first connecting arm 200 can drive the backrest 120 to rotate relative to the sofa body 110, thereby adjusting the angle α between the backrest 120 and the sofa body 110, which can meet the diverse usage needs of users.

[0067] In some embodiments, the backrest 120 may have a first adjustment direction M and a second adjustment direction N that are opposite to each other. When the backrest 120 is rotated along the first adjustment direction M, the angle α between the backrest 120 and the sofa body 110 gradually increases. When the backrest 120 is rotated along the second adjustment direction N, the angle α between the backrest 120 and the sofa body 110 gradually decreases.

[0068] like Figures 3 to 6 As shown, in some embodiments, the second connecting arm 310 may include an integral rotating portion 312 and a plug-in portion 311. The rotating portion 312 may have a U-shaped structure and, correspondingly, may have two opposing wall plates 3121. Both wall plates 3121 are rotatably connected to the mounting base 320 via a first pivot 331. In some embodiments, the plug-in portion 311 may be connected to the end of one of the wall plates 3121 away from the mounting base 320. The plug-in portion 311 can be used for plug-in connection with the first connecting arm 200. Accordingly, a slot structure may be formed in the plug-in portion 311.

[0069] In some embodiments, the adjustment mechanism 300 further includes a positioning component 340. The positioning component 340 can be installed in the mounting base 320 and is disposed opposite to the second connecting arm 310. That is, the positioning component 340 can also be indirectly connected to the sofa body 110 through the mounting base 320. Both wall panels 3121 have a plurality of positioning grooves 31211 at their ends facing the positioning component 340. In the embodiments, the plurality of positioning grooves 31211 on the same wall panel 3121 can be arranged sequentially around the first rotating shaft 331. That is, the plurality of positioning grooves 31211 on the same wall panel 3121 can be arranged around the rotation axis of the second connecting arm 310. Positioning teeth 31212 can be disposed between adjacent positioning grooves 31211. In some embodiments, along the rotation direction of the second connecting arm 310, the positioning groove 31211 located at the edge position can directly utilize the space on one side of the second connecting arm 310, and the corresponding position of the second connecting arm 310 may not be grooved. The positioning component 340 can be inserted into the space on one side of the second connecting arm 310 and abut against the positioning tooth 31212 on one side of the positioning groove 31211.

[0070] In this embodiment, the positioning component 340 can cooperate with the positioning groove 31211 and the positioning tooth 31212 to position the rotation angle of the second connecting arm 310 relative to the mounting base 320, thereby achieving the positioning of the backrest 120 after angle adjustment and preventing the backrest 120 from rotating arbitrarily relative to the sofa body 110. It is understood that the positioning component 340 can be inserted into different positioning grooves 31211 and limited by the positioning tooth 31212 to position the backrest 120 at different adjustment angles.

[0071] like Figures 3 to 6 As shown, in some embodiments, the positioning assembly 340 may include a positioning member 341 and an elastic member 342. One end of the positioning member 341 is rotatably mounted on the mounting base 320 via a second rotating shaft 332. The second rotating shaft 332 may be arranged parallel to the first rotating shaft 331. In some embodiments, the positioning member 341 may be generally plate-shaped and parallel to the first rotating shaft 331. The end of the positioning member 341 away from the second rotating shaft 332 may be inserted into positioning grooves 31211 on two wall plates 3121. Furthermore, the positioning member 341 can switch to different positioning grooves 31211 when the second connecting arm 310 rotates.

[0072] In some embodiments, the elastic member 342 can be a torsion spring. The elastic member 342 can be sleeved on the second rotating shaft 332, one end of the elastic member 342 can act on the mounting seat 320, and the other end of the elastic member 342 can act on the side of the positioning member 341 facing the bottom 321 of the mounting seat 320. When the angle between the backrest 120 and the sofa body 110 is at a minimum value, the elastic member 342 can be in a torsion state or a natural state. Accordingly, when the included angle a between the backrest 120 and the sofa body 110 gradually increases, the elastic member 342 can gradually store corresponding elastic potential energy. When the included angle a between the backrest 120 and the sofa body 110 gradually decreases, the elastic member 342 elastically deforms and gradually releases the elastic potential energy, and drives the positioning member 341 to rotate away from the one end of the second rotating shaft 332 in a direction away from the bottom 321 of the mounting seat 320. The bottom 321 of the mounting seat 320 can refer to the end of the mounting seat 320 close to the sofa body 110.

[0073] When it is necessary to adjust the angle of the backrest 120, the user can apply force to the backrest 120 to rotate the backrest 120 relative to the sofa body 110, that is, the user can manually adjust the angle of the backrest 120. In this process, the force received by the backrest 120 can be transmitted to the first connecting arm 200 and can be transmitted to the second connecting arm 310 through the first connecting arm 200 to make the second connecting arm 310 rotate around the first rotating shaft 331. In the process of rotating the second connecting arm 310, the positioning member 341 also rotates around the second rotating shaft 332, and the one end of the positioning member 341 away from the second rotating shaft 332 can be switched to different positioning grooves 31211. When the angle adjustment of the backrest 120 is completed, the positioning member 341 can be positioned and inserted into the positioning groove 31211 at the corresponding position to realize the positioning of the angle of the backrest 120.

[0074] In the embodiments of the present application, through the cooperation of the positioning member 341 and the positioning grooves 31211 on the second connecting arm 310, multi-gear adjustment of the included angle a between the backrest 120 and the sofa body 110 can be realized. That is, multi-gear adjustment of the angle of the backrest 120 can be realized, and the user can adjust the angle of the backrest 120 according to needs to meet the diversified use needs of the user.

[0075] In other embodiments, the positioning assembly 340 can also be selected from a spring needle or a positioning protrusion. When the backrest 120 is rotated to different angles, the positioning assembly 340 can be positioned and inserted into the positioning groove 31211 opposite to itself to realize the adjustment of the angle of the backrest 120.

[0076] As Figures 2 to 5As shown, in some embodiments, the backrest 120 can be adjusted to be in the same plane with the sofa body 110, i.e. the angle between the backrest 120 and the sofa body 110 can be adjusted to 180°. In some embodiments, one end of the mounting base 320 close to the sofa body 110 can be a closed structure. In addition, the rotating part 312 is inserted into the mounting base 320 and is rotationally connected with the mounting base 320. When the angle between the backrest 120 and the sofa body 110 is adjusted to 180°, the rotating part 312 can abut against the bottom 321 of the mounting base 320 and can be limited by the bottom 321 of the mounting base 320 to continue rotating in the first adjusting direction M.

[0077] In some embodiments, the adjusting mechanism 300 further comprises a limiting assembly 350 which can be installed in the rotating part 312. When the included angle a between the backrest 120 and the sofa body 110 is adjusted to a minimum value, the limiting assembly 350 can be used to limit the backrest 120 to continue rotating in the second adjusting direction N. Thus, the rotation stroke of the backrest 120 can be limited.

[0078] In embodiments, the limiting assembly 350 can comprise a first limiting piece 351 and a second limiting piece 352. In some embodiments, the first limiting piece 351 can be a plate-shaped structure parallel to the wall plates 3121. The first limiting piece 351 can be rotationally installed on the first rotating shaft 331 and located between the two wall plates 3121. One end of the first limiting piece 351 can be arranged towards the positioning piece 341, the positioning piece 341 can be located on the side of the end of the first limiting piece 351 close to the bottom 321 of the mounting base 320, and the positioning piece 341 can be located on the rotation path of the end of the first limiting piece 351.

[0079] In embodiments, the second limiting piece 352 can be a rod-shaped structure. The second limiting piece 352 can be connected between the two wall plates 3121. The second limiting piece 352 can be located on the side of the first rotating shaft 331 away from the positioning assembly 340. The second limiting piece 352 can be located on the side of the first limiting piece 351 close to the bottom 321 of the mounting base 320, and the second limiting piece 352 can be located on the rotation path of the end of the first limiting piece 351 away from the positioning piece 341.

[0080] When the backrest 120 is rotated to the minimum value of the included angle a with the sofa body 110, the end of the first limiting piece 351 towards the positioning piece 341 can abut against the positioning piece 341, and the end of the first limiting piece 351 towards the second limiting piece 352 can abut against the second limiting piece 352, so as to limit the rotation stroke of the backrest 120.

[0081] In other embodiments, the first limiting piece 351 can also be a rod-shaped or block-shaped structure.

[0082] In some other embodiments, the first limiting member 351 can also be fixedly arranged on the side of the positioning member 341 away from the bottom 321 of the mounting base 320. When the backrest 120 is rotated to the angle a between the backrest 120 and the sofa body 110 is at a minimum value, the end of the first limiting member 351 away from the positioning member 341 can abut against the second limiting member 352 or the first rotating shaft 331.

[0083] As shown in FIG. 1, in some embodiments, the backrest 120 can have three gears. Figures 5 to 8

[0084] When the backrest 120 is in the first gear, the angle a between the backrest 120 and the sofa body 110 can be set to 105° to 120°, which can provide a more comfortable sitting posture for the user, and the backrest 120 can provide more comfortable support for the user in a sitting posture, balance support and comfort, help to relieve back fatigue, suitable for user daily relaxation and rest, and suitable for user long time sitting, such as reading, etc. For example, the angle a between the backrest 120 and the sofa body 110 can be set to 105°, 108°, 110°, 115°, 118°, 120°, or any other angle in the range of 105° to 120°.

[0085] When the backrest 120 is in the second gear, the angle a between the backrest 120 and the sofa body 110 can be set to 120° to 135°, which can make the user in a semi-lie posture, can reduce the user's spine pressure, suitable for short time semi-lie rest and nap, help to relieve user back pain. For example, the angle a between the backrest 120 and the sofa body 110 can be set to 120°, 125°, 128°, 130°, 132°, 135°, or any other angle in the range of 120° to 135°.

[0086] When the backrest 120 is in the third gear, the angle a between the backrest 120 and the sofa body 110 can be set to 135° to 180°, which can be used as a recliner or an adjustable bed, which can provide a more comfortable lying environment for the user, and is conducive to the user to completely relax and sleep. For example, the angle a between the backrest 120 and the sofa body 110 can be set to 135°, 140°, 145°, 155°, 160°, 175°, 180°, or any other angle in the range of 135° to 180°. When the backrest 120 is in the third gear, the angle a between the backrest 120 and the sofa body 110 is set to 180°, the sofa can be used as a bed, which can be used for the user to lie down and rest.

[0087] ​To sum up, the sofa provided in the embodiments of the present application can realize detachable connection of the backrest 120 and the sofa body 110, and is convenient for storage and transportation of the sofa. In addition, the angle of the backrest 120 can be adjusted manually by the user, and multi-gear adjustment of the angle of the backrest 120 can be realized, so as to meet the diversified use requirements of the user.

[0088] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0089] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A sofa, characterized in that The sofa comprises a sofa body, a backrest, a first connecting arm and a second connecting arm. The first connecting arm is provided with a plug-in groove and a first locking member, the second connecting arm is inserted into the plug-in groove and is in plug-in connection with the first connecting arm, the second connecting arm is provided with a second locking member matched with the first locking member, and the first locking member and the second locking member are in detachable connection when the second connecting arm is inserted into the plug-in groove. One of the first connecting arm and the second connecting arm is connected to the sofa body, and the other is connected to the backrest.

2. The sofa according to claim 1, characterized in that The first connecting arm further comprises a connecting arm body, and the plug-in groove is formed in the connecting arm body. The first locking member comprises a connecting portion and an elastic arm connected to each other, the connecting portion is connected to the connecting arm body, the elastic arm is arranged on one side of the plug-in groove, the elastic arm is provided with a locking protrusion on the side thereof facing the plug-in groove, and the locking protrusion is inserted into the plug-in groove. The second locking member comprises a slot structure formed on the second connecting arm, and the locking protrusion is inserted into the slot structure when the second connecting arm is inserted into the plug-in groove.

3. The sofa according to claim 2, characterized in that The side of the elastic arm away from the plug-in groove is further provided with a hand holding portion, and the hand holding portion is located at the end of the locking protrusion away from the connecting portion.

4. The sofa of claim 2, wherein, The connecting arm body is provided with two spaced-apart limiting edges on the side thereof facing the elastic arm. When the second connecting arm is inserted into the plug-in groove, the limiting edges abut against the side of the second connecting arm facing the elastic arm. The locking protrusion is arranged between the two limiting edges and is inserted into the slot structure.

5. The sofa of claim 1, wherein, The first connecting arm is connected to the backrest. The sofa further comprises an adjusting mechanism, the adjusting mechanism comprises a positioning assembly and the second connecting arm, one end of the second connecting arm is rotationally connected to the sofa body, and the end of the second connecting arm away from the sofa body is in plug-in connection with the first connecting arm. The positioning assembly is arranged on the side of the second connecting arm away from the first connecting arm, the end of the second connecting arm facing the positioning assembly is provided with a plurality of positioning grooves, the plurality of positioning grooves are arranged around the rotation axis of the second connecting arm, and the positioning assembly is selectively inserted into one of the positioning grooves.

6. The sofa of claim 5, wherein, The second connecting arm comprises a plug-in portion and a rotating portion, the rotating portion comprises two oppositely arranged wall plates, the end of each of the two wall plates facing the positioning assembly is provided with the plurality of positioning grooves, and the positioning assembly is simultaneously inserted into the positioning grooves on the two wall plates. The plug-in portion is connected to the end of one of the wall plates away from the positioning assembly, and the plug-in portion is in plug-in connection with the first connecting arm.

7. The sofa of claim 5, wherein, The positioning assembly comprises a positioning member and an elastic member, one end of the positioning member is rotationally connected to the sofa body, and the other end of the positioning member is selectively inserted into the positioning groove. One end of the elastic member acts on the positioning member, and the other end of the elastic member acts on the sofa body. An included angle α between the backrest and the sofa body is at a minimum value, and the elastic member is in a twisted state or a natural state.

8. The sofa according to any one of claims 5 to 7, characterized in that The adjusting mechanism further comprises a mounting seat fixedly installed on the sofa body, and the second connecting arm and the positioning assembly are connected to the sofa body through the mounting seat. The mounting seat has a bottom portion close to the sofa body. When the included angle α between the backrest and the sofa body is at a maximum value, the second connecting arm abuts against one side of the bottom portion away from the sofa body.

9. The sofa according to any one of claims 5 to 7, characterized in that The adjusting mechanism further comprises a limiting assembly. When the included angle α between the backrest and the sofa body is at a minimum value, the limiting assembly abuts against the positioning assembly and the second connecting arm.

10. The sofa of claim 9, wherein, The limiting assembly comprises a first limiting member and a second limiting member. The first limiting member is rotationally connected to the second connecting arm, and the second limiting member is connected to the second connecting arm. The second limiting member is located on one side of the first limiting member away from the positioning assembly. One end of the first limiting member towards the positioning assembly is located on one side of the positioning assembly away from the sofa body. The positioning assembly is located on a rotation path of the one end of the first limiting member. One end of the first limiting member away from the positioning assembly is located on one side of the second limiting member away from the sofa body. The second limiting member is located on a rotation path of the one end of the first limiting member.

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