Deformable chair

Abstract

The utility model discloses a deformable chair, which comprises a horizontally arranged cushion, a first connecting surface, a second connecting surface, a first connecting rod, a second connecting rod and a third connecting rod, wherein one end of the cushion is provided with an inclined first connecting surface; one end, close to the cushion, of the backrest is provided with a second connecting surface parallel to the first connecting surface; the rotary connecting structure is arranged between the first connecting surface and the second connecting surface, so that the backrest can rotate relative to the cushion, and the rotating center line of the backrest relative to the cushion is simultaneously positioned in the center positions of the first connecting surface and the second connecting surface and is simultaneously vertical to the first connecting surface and the second connecting surface; the backrest is provided with a first working position perpendicular to the cushion and a second working position forming an included angle of 180 degrees with the cushion; the supporting structure is arranged at the bottom of the cushion and can adjust the size of the supporting area in the horizontal direction, so that the supporting structure can only support the cushion or simultaneously support the cushion and the backrest located at the second working position. The deformable chair can deform and serve as a temporary bed for a user to horizontally lie on the back.

Description

Technical Field

[0001] The present application relates to the technical field of furniture, and in particular to a deformable chair. Background Art

[0002] Furniture products are indispensable tools in people's daily lives, such as dining tables, chairs, coffee tables, etc. Among them, the functions of traditional seats are relatively single and cannot meet the needs of users in different scenarios. For this reason, seats with adjustable backrest angles are launched on the market so that the seats can also be used as reclining chairs. However, the backrests of these seats can only be adjusted to a limited angle, and can only allow users to lie down at an angle. They cannot be used as temporary beds for users to lie on their backs horizontally, and cannot meet the needs of some users. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a deformable chair that can be deformed and used as a temporary bed for a user to lie on his back horizontally.

[0004] According to an embodiment of the present application, the deformable chair includes: a seat cushion, which is horizontally arranged, and one end of the seat cushion has a first connecting surface that is inclined, and the angle between the first connecting surface and the horizontal plane is 45°; a backrest, which is independent of the seat cushion, and the end of the backrest close to the seat cushion has a second connecting surface that matches the first connecting surface, and the second connecting surface is parallel to the first connecting surface; a rotating connecting structure, which is arranged between the first connecting surface and the second connecting surface so that the backrest can rotate relative to the seat cushion, and the rotation center line of the backrest relative to the seat cushion is simultaneously located at the center position of the first connecting surface and the second connecting surface and is perpendicular to the first connecting surface and the second connecting surface, so that the backrest has a first working position perpendicular to the seat cushion and a second working position with an angle of 180° with the seat cushion; a supporting structure, which is arranged at the bottom of the seat cushion and can adjust the size of the supporting area in the horizontal direction, so that the supporting structure can only support the seat cushion or simultaneously support the seat cushion and the backrest located in the second working position.

[0005] The deformable chair according to the embodiment of the present application has at least the following beneficial effects: since the first connecting surface and the second connecting surface are both inclined and parallel to each other, and the rotation center line of the backrest relative to the seat cushion is perpendicular to the first connecting surface and the second connecting surface at the same time, the backrest located at any one of the first working position and the second working position can be switched to the other of the first working position and the second working position by rotating 180° relative to the seat cushion. Among them, the rotation center line of the backrest relative to the seat cushion is located at the center position of the first connecting surface and the second connecting surface at the same time, so that the backrest will not be misaligned relative to the seat cushion in the horizontal direction after rotating from the first working position to the second working position. When the backrest is rotated to the first working position relative to the seat cushion, the backrest is perpendicular to the seat cushion and can be leaned on by a sitting user, and is used as a chair at this time; when the backrest is rotated to the second working position relative to the seat cushion, the angle between the backrest and the seat cushion is 180°, that is, the backrest is in a horizontal state, and is used as a temporary bed for users to lie horizontally.

[0006] According to some embodiments of the present application, a first positioning structure is provided between the backrest and the seat cushion, and the first positioning structure is used to limit the rotation of the backrest located at the first working position or the second working position relative to the seat cushion and to release the restriction on the backrest.

[0007] According to some embodiments of the present application, the rotating connection structure includes a first connecting member and a second connecting member, the first connecting member is fixedly arranged on the first connecting surface, the second connecting member is fixedly arranged on the second connecting surface, the first connecting member and the second connecting member are rotationally connected through a pivot axis, and a plurality of steel balls are sandwiched between the first connecting member and the second connecting member.

[0008] According to some embodiments of the present application, the first positioning structure includes a spherical protrusion, the first connecting member includes a first main body and a first extension portion arranged on the first connecting surface, the first extension portion is arranged on opposite sides of the first main body, the second connecting member includes a second main body and a second extension portion arranged on the second connecting surface, the second extension portion is arranged on opposite sides of the second main body, one of the first extension portion and the second extension portion is provided with the spherical protrusion, and the other of the first extension portion and the second extension portion is provided with a positioning hole for cooperating with the spherical protrusion for positioning.

[0009] According to some embodiments of the present application, the support structure includes two groups of support leg assemblies arranged side by side, the support leg assemblies include a first support leg and a second support leg arranged at intervals, and in the same group of the support leg assemblies, a first support beam and a second support beam are horizontally arranged between the first support leg and the second support leg, the first support beam is a hollow tubular structure, one end of the first support beam is an open end, the other end of the first support beam is fixedly connected to one of the first support leg and the second support leg, one end of the second support beam is fixedly connected to the other of the first support leg and the second support leg, and the other end of the second support beam is movably inserted into the first support beam from the open end of the first support beam.

[0010] According to some embodiments of the present application, the support leg assembly also includes a second positioning structure arranged between the first support beam and the second support beam, and the second positioning structure is used to limit the axial movement of the second support beam relative to the first support beam along the first support beam and can release the restriction on the second support beam.

[0011] According to some embodiments of the present application, the second positioning structure includes a latch assembly, which includes a latch, a compression spring and a sleeve with openings at both ends. A threaded through hole is provided on the first support beam, and the outer peripheral wall of the sleeve has a threaded connection structure and is threadedly connected to the threaded through hole. The latch is movably inserted into the sleeve along the axial direction of the sleeve, and a first limiting portion is provided at the portion of the latch located in the sleeve. A second limiting portion is provided at an end of the sleeve away from the first support beam. The compression spring is sleeved on the latch, one end of the compression spring abuts against the first limiting portion, and the other end of the compression spring abuts against the second limiting portion. The compression spring is used to provide an elastic force that drives the latch to extend into the first support beam. A third limiting portion for limiting the latch from being separated from the sleeve is provided at an end of the latch away from the first support beam and / or an end of the sleeve close to the first support beam. A plurality of plug holes distributed along the axial direction of the second support beam and used for cooperating with the latch for positioning are provided at intervals on the second support beam.

[0012] According to some embodiments of the present application, the second limiting portion is annular, a avoidance opening is provided on the second limiting portion, a blocking block passing through the avoidance opening is provided on the latch, and the blocking block and the first limiting portion are spaced apart along the axial direction of the latch.

[0013] According to some embodiments of the present application, a pull ring for applying force is provided at one end of the latch away from the first support beam.

[0014] According to some embodiments of the present application, a headrest is provided at one end of the backrest away from the seat cushion, and the headrest is located above the backrest when the backrest is rotated to the second working position.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural schematic diagram of a deformable chair in an embodiment of the present application when the backrest is located in a first working position;

[0018] Figure 2 yes Figure 1 A partial enlarged schematic diagram in the middle;

[0019] Figure 3 is a structural schematic diagram of another viewing angle when the backrest of a deformable chair in one embodiment of the present application is located in a first working position;

[0020] Figure 4 yes Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0021] Figure 5 It is a schematic structural diagram of a deformable chair backrest after being rotated 45° relative to the seat cushion from the first working position in one embodiment of the present application;

[0022] Figure 6 It is a schematic structural diagram of a deformable chair backrest after being rotated 135 degrees relative to the seat cushion from the first working position in one embodiment of the present application;

[0023] Figure 7 It is a structural schematic diagram of a deformable chair in an embodiment of the present application when the backrest is rotated 180° relative to the seat cushion from the first working position to the second working position without adaptively adjusting the supporting structure;

[0024] Figure 8 It is a structural schematic diagram of a deformable chair in an embodiment of the present application after the backrest is rotated 180 degrees relative to the seat cushion from the first working position to the second working position and the supporting structure is adaptively adjusted;

[0025] Fig. 9 is a structural schematic diagram of a rotating connection structure of an embodiment of the present application;

[0026] Fig.10 yes Fig. 9 A partial enlarged schematic diagram of point C in the middle;

[0027] Fig.11 is a structural schematic diagram of a support structure of an embodiment of the present application;

[0028] Fig.12 yes Fig.11 The local enlarged schematic diagram of point D in the middle;

[0029] Fig.13 It is a partial cross-sectional schematic diagram of a latch assembly according to an embodiment of the present application.

[0030] Reference numerals:

[0031] The seat cushion 100, the first connecting surface 110, the backrest 200, the second connecting surface 210, the first connecting member 310, the first main body 311, the first extending portion 312, the positioning hole 3121, the first mounting through hole 3122, the second connecting member 320, the second main body 321, the second extending portion 322, the spherical protrusion 3221, the second mounting through hole 3222, the pivot shaft 330, the steel ball 340, the first support leg 410, the second support leg 420, the first support beam 430, the protrusion 431, the second support beam 440, the plug-in hole 441, the third support beam 450, the fourth support beam 460, the latch 510, the first limiting portion 511, the block 512, the compression spring 520, the sleeve 530, the second limiting portion 531, the avoidance opening 5311, the third limiting portion 540, the pull ring 550, and the headrest 600. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0033] In the description of the present application, it should be understood that if orientation descriptions are involved, the orientations or positional relationships indicated, such as up, down, front, back, left, and right, are based on the orientations or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0034] In the description of this application, if the words "some", "greater than", "less than", "exceed", "above", "below", "within" etc. appear, "some" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number, and "above", "below", "within", etc. are understood to include the number.

[0035] In the description of this application, if the words "first", "second", etc. appear, they are only used to distinguish technical features and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0037] Reference Figures 1 to 13 , a deformable chair according to an embodiment of the present application includes a seat cushion 100, a backrest 200, a rotation connection structure and a support structure.

[0038] Specifically, the seat cushion 100 is horizontally arranged, and one end of the seat cushion 100 has a first connecting surface 110 arranged obliquely, and the angle α between the first connecting surface 110 and the horizontal plane is 45°. The backrest 200 is independent of the seat cushion 100, and the end of the backrest 200 close to the seat cushion 100 has a second connecting surface 210 matched with the first connecting surface 110, and the second connecting surface 210 is parallel to the first connecting surface 110. The rotating connection structure is arranged between the first connecting surface 110 and the second connecting surface 210 so that the backrest 200 can rotate relative to the seat cushion 100. The rotation center line relative to the seat cushion 100 is located at the center position of the first connecting surface 110 and the second connecting surface 210 and is perpendicular to the first connecting surface 110 and the second connecting surface 210, so that the backrest 200 has a first working position perpendicular to the seat cushion 100 and a second working position with an angle of 180° with the seat cushion 100. The support structure is arranged at the bottom of the seat cushion 100 and can adjust the size of the support area in the horizontal direction, so that the support structure can only support the seat cushion 100 or simultaneously support the seat cushion 100 and the backrest 200 located in the second working position.

[0039] Since the first connecting surface 110 and the second connecting surface 210 are both inclined and parallel to each other, and the rotation center line of the backrest 200 relative to the seat cushion 100 is perpendicular to both the first connecting surface 110 and the second connecting surface 210, the backrest 200 located at any one of the first working position and the second working position can be switched to the other of the first working position and the second working position by rotating 180° relative to the seat cushion 100. The rotation center line of the backrest 200 relative to the seat cushion 100 is located at the center of both the first connecting surface 110 and the second connecting surface 210, so that the backrest 200 will not be misaligned relative to the seat cushion 100 in the horizontal direction after rotating from the first working position to the second working position. When the backrest 200 is rotated to the first working position relative to the seat cushion 100, the backrest 200 is perpendicular to the seat cushion 100 and can be leaned on by a sitting user, and is used as a chair at this time; when the backrest 200 is rotated to the second working position relative to the seat cushion 100, the angle between the backrest 200 and the seat cushion 100 is 180°, that is, the backrest 200 is in a horizontal state, and is used as a temporary bed for the user to lie horizontally on his back.

[0040] It should be noted that, in some embodiments, the thickness of the seat cushion 100 is the same as the thickness of the backrest 200, that is, the width dimension of the first connecting surface 110 is the same as the width dimension of the second connecting surface 210, so that the backrest 200 will not be misaligned relative to the seat cushion 100 in the vertical direction after rotating from the first working position to the second working position.

[0041] It should be noted that, in some of the embodiments, a first positioning structure is provided between the backrest 200 and the seat cushion 100, and the first positioning structure is used to limit the rotation of the backrest 200 located at the first working position or the second working position relative to the seat cushion 100 and to release the restriction on the backrest 200. When the backrest 200 is rotated to the first working position or the second working position relative to the seat cushion 100 as needed, the first positioning structure can be used to limit the rotation of the backrest 200 relative to the seat cushion 100, which is beneficial to improve the stability and reliability of the backrest 200 when working.

[0042] Reference Fig. 9 and Fig.10 In some embodiments, the rotating connection structure includes a first connecting member 310 and a second connecting member 320. The first connecting member 310 is fixedly disposed on the first connecting surface 110, and the second connecting member 320 is fixedly disposed on the second connecting surface 210. The first connecting member 310 and the second connecting member 320 are rotatably connected via a pivot shaft 330. The structure is simple and easy to implement. A plurality of steel balls 340 are sandwiched between the first connecting member 310 and the second connecting member 320, which is conducive to reducing the friction force when the first connecting member 310 and the second connecting member 320 rotate relative to each other.

[0043] Specifically, the specific rotation connection structure between the first connecting member 310 and the second connecting member 320 may refer to hardware turntables on the market.

[0044] It should be noted that, in some other embodiments, the first connecting member 310 and the second connecting member 320 may also be coated with lubricating oil or provided with bearings to reduce the friction force when the two rotate relative to each other, which is not limited here.

[0045] Reference Fig. 9 In some embodiments, the first positioning structure includes a spherical protrusion 3221, the first connecting member 310 includes a first main body 311 and a first extension portion 312 arranged on the first connecting surface 110, and the first extension portion 312 is arranged on opposite sides of the first main body 311, and the second connecting member 320 includes a second main body 321 and a second extension portion 322 arranged on the second connecting surface 210, and the second extension portion 322 is arranged on opposite sides of the second main body 321, and the spherical protrusion 3221 is arranged on the side of the second extension portion 322 facing the first extension portion 312, and the first extension portion 312 is provided with a positioning hole 3121 for cooperating with the spherical protrusion 3221 for positioning. When the backrest 200 is rotated to the first working position or the second working position relative to the seat cushion 100 as needed, the spherical protrusion 3221 can be inserted into the corresponding positioning hole 3121 to position the backrest 200. When an external force is applied to drive the backrest 200 to rotate relative to the seat cushion 100, the spherical protrusion 3221 can be driven out of the corresponding positioning hole 3121 to release the restriction on the backrest 200.

[0046] It should be noted that in some other embodiments, the spherical protrusion 3221 can also be arranged on the side of the first extension portion 312 facing the second extension portion 322, and correspondingly, the positioning hole 3121 is arranged on the side of the second extension portion 322 facing the first extension portion 312, which is not limited here.

[0047] Reference Fig. 9 and Fig.10 In some of the embodiments, a first mounting through hole 3122 for inserting a screw is provided on the first extension portion 312, and the first connecting member 310 is fixedly connected to the first connecting surface 110 by means of screws. Of course, the first mounting through hole 3122 can also be provided on the first main body 311, which is not limited here.

[0048] Reference Fig. 9 and Fig.10 In some of the embodiments, a second mounting through hole 3222 for inserting a screw is provided on the second extension portion 322, and the second connecting member 320 is fixedly connected to the second connecting surface 210 by means of screws. Of course, the second mounting through hole 3222 can also be provided on the second main body 321, which is not limited here.

[0049] It should be noted that, in some other embodiments, the spherical protrusion 3221 can also be arranged on the first connecting surface 110, and correspondingly, the positioning hole 3121 is arranged on the second connecting surface 210. In this case, there is no need to arrange the above-mentioned first extension portion 312 and second extension portion 322, and no limitation is made here.

[0050] It should be noted that, in some other embodiments, the positioning hole 3121 mentioned above can be replaced by a positioning groove, which is not limited here.

[0051] It should be noted that, in some other embodiments, the first positioning structure may also be a magnetic attraction structure, which is not limited here.

[0052] Reference Figure 1 , Figure 7 , Figure 8 and Fig.11 In some embodiments, the support structure includes two groups of support leg assemblies arranged side by side, the support leg assemblies include a first support leg 410 and a second support leg 420 arranged at intervals, and in the same group of support leg assemblies, there are a first support beam 430 and a second support beam 440 arranged horizontally between the first support leg 410 and the second support leg 420, the first support beam 430 is a hollow tubular structure, one end of the first support beam 430 is an open end, the other end of the first support beam 430 is fixedly connected to one of the first support leg 410 and the second support leg 420, one end of the second support beam 440 is fixedly connected to the other of the first support leg 410 and the second support leg 420, and the other end of the second support beam 440 is movably inserted into the first support beam 430 from the open end of the first support beam 430. When the backrest 200 rotates to the first working position relative to the seat cushion 100, the second support beam 440 is driven to retract into the first support beam 430, and at this time the leg assembly only supports the seat cushion 100; when the backrest 200 rotates to the second working position relative to the seat cushion 100, the second support beam 440 is driven to extend from the first support beam 430, and at this time the leg assembly supports both the seat cushion 100 and the backrest 200.

[0053] Specifically, in the same set of support leg assemblies, the first support beam 430 is fixedly connected to the first support leg 410, and the second support beam 440 is fixedly connected to the second support leg 420. Of course, the first support beam 430 can also be fixedly connected to the second support leg 420, and correspondingly, the second support beam 440 is fixedly connected to the first support leg 410, which is not limited here.

[0054] Reference Fig.11 In some embodiments, a third support beam 450 is disposed between the two first legs 410, and a fourth support beam 460 is disposed between the two second legs 420, which is beneficial to improving the stability and reliability of the leg assembly during operation.

[0055] It should be noted that, in some embodiments, the support leg assembly further includes a second positioning structure disposed between the first support beam 430 and the second support beam 440, and the second positioning structure is used to limit the second support beam 440 from moving relative to the first support beam 430 along the axial direction of the first support beam 430 and to release the restriction on the second support beam 440. When the support leg assembly is adaptively adjusted according to the working position of the backrest 200, the second positioning structure can limit the second support beam 440 from moving relative to the first support beam 430 along the axial direction of the first support beam 430, which is conducive to improving the stability and reliability of the support leg assembly during operation.

[0056] Reference Figures 11 to 13 In some embodiments, the second positioning structure includes a latch assembly, which includes a latch 510, a compression spring 520 and a sleeve 530 with openings at both ends. A threaded through hole (not shown in the figure) is provided on the first support beam 430. The outer peripheral wall of the sleeve 530 has a threaded connection structure and is threadedly connected to the above-mentioned threaded through hole. The latch 510 is movably inserted into the sleeve 530 along the axial direction of the sleeve 530. The portion of the latch 510 located in the sleeve 530 is provided with a first limiting portion 511. The end of the sleeve 530 away from the first support beam 430 is provided with a second limiting portion 531. The compression spring 520 is sleeved with On the latch 510, one end of the compression spring 520 abuts against the first limiting portion 511, and the other end of the compression spring 520 abuts against the second limiting portion 531. The compression spring 520 is used to provide an elastic force that drives the latch 510 to extend into the first support beam 430. One end of the latch 510 away from the first support beam 430 and / or one end of the sleeve 530 close to the first support beam 430 are provided with a third limiting portion 540 for limiting the latch 510 from being separated from the sleeve 530. The second support beam 440 is provided with a plurality of insertion holes 441 distributed along the axial direction of the second support beam 440 and used to cooperate with the latch 510 for positioning. When the backrest 200 is rotated to the first working position or the second working position relative to the seat cushion 100 as required, the latch 510 is aligned with the corresponding insertion hole 441 and inserted into the corresponding insertion hole 441 under the elastic force provided by the compression spring 520 to limit the second support beam 440 from moving relative to the first support beam 430 along the axial direction of the first support beam 430. When the backrest 200 needs to change its working position, force is applied to the latch 510 to drive the latch 510 to disengage from the corresponding insertion hole 441, and the support leg assembly can be adaptively adjusted according to the working position of the backrest 200.

[0057] Specifically, the end of the pin 510 away from the first support beam 430 and the end of the sleeve 530 close to the first support beam 430 are both provided with a third limiting portion 540. Of course, only the end of the pin 510 away from the first support beam 430 or only the end of the sleeve 530 close to the first support beam 430 may be provided with the third limiting portion 540, which is not limited here.

[0058] Reference Fig.12 In some embodiments, a protrusion 431 is provided on the first support beam 430 , and the threaded through hole is formed on the protrusion 431 and connected to the interior of the first support beam 430 .

[0059] It should be noted that, in some other embodiments, the sleeve 530 can also be welded or integrally formed on the first support beam 430 and connected to the interior of the first support beam 430. In this case, there is no need to provide the above-mentioned threaded through hole, and this is not limited here.

[0060] Reference Fig.13 In some embodiments, the second limiting portion 531 is annular, and a clearance opening 5311 is provided on the second limiting portion 531. The latch 510 is provided with a block 512 that penetrates the clearance opening 5311, and the block 512 and the first limiting portion 511 are spaced apart along the axial direction of the latch 510. When it is necessary to release the restriction of the latch assembly on the second support beam 440, force is applied to the latch 510 to drive the latch 510 to disengage from the corresponding plug hole 441, and at the same time, the block 512 is driven to move to the side of the second limiting portion 531 that is away from the compression spring 520, and then the latch 510 is rotated to displace the block 512 from the clearance opening 5311, so that the latch assembly can be kept in a state of releasing the restriction on the second support beam 440. That is, there is no need to always apply force to the latch 510 to keep the latch assembly in a state of releasing the restriction on the second support beam 440, that is, only one person is required to complete the adaptive adjustment of the support leg assembly. When the support leg assembly is adaptively adjusted according to the working position of the backrest 200, the latch 510 is rotated to align the block 512 with the avoidance opening 5311. At this time, after the external force applied to the latch 510 is removed, the latch 510 can be inserted into the corresponding plug hole 441 under the action of the provided elastic force.

[0061] Reference Fig.12 and Fig.13 In some of the embodiments, a pull ring 550 for applying force is provided at one end of the latch 510 away from the first support beam 430 to facilitate the user to apply force.

[0062] Reference Figure 1 , Figure 3 and Figure 8In some embodiments, a headrest 600 is provided at one end of the backrest 200 away from the seat cushion 100. When the backrest 200 rotates to the second working position, the headrest 600 is located above the backrest 200 to support the user's head.

[0063] It should be noted that, in some embodiments, the headrest 600 is detachably disposed on the backrest 200 to facilitate replacement of the headrest 600 .

[0064] It should be noted that, in some embodiments, the headrest 600 is fixed to the backrest 200 by Velcro.

[0065] It should be noted that, in some other embodiments, the headrest 600 may also be fixed to the backrest 200 by an adjustable strap, which is not limited here.

[0066] In the description of this specification, if the description involves reference terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" and "some examples", it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A deformable chair, characterized in that: include: A seat cushion, the seat cushion is arranged horizontally, and one end of the seat cushion has a first connecting surface arranged obliquely, and the angle between the first connecting surface and the horizontal plane is 45°; A backrest, the backrest being independent of the seat cushion, and the end of the backrest close to the seat cushion having a second connecting surface matched with the first connecting surface, the second connecting surface being parallel to the first connecting surface; A rotating connection structure, wherein the rotating connection structure is arranged between the first connection surface and the second connection surface, so that the backrest can rotate relative to the seat cushion, and the rotation center line of the backrest relative to the seat cushion is located at the center position of the first connection surface and the second connection surface at the same time and is perpendicular to the first connection surface and the second connection surface at the same time, so that the backrest has a first working position perpendicular to the seat cushion and a second working position with an angle of 180° with the seat cushion; A support structure is arranged at the bottom of the seat cushion and can adjust the size of the support area in the horizontal direction so that the support structure can only support the seat cushion or simultaneously support the seat cushion and the backrest located in the second working position.

2. The transformable chair according to claim 1, characterized in that: A first positioning structure is provided between the backrest and the seat cushion, and the first positioning structure is used to limit the rotation of the backrest located at the first working position or the second working position relative to the seat cushion and to release the restriction on the backrest.

3. The transformable chair according to claim 2, characterized in that: The rotating connection structure includes a first connecting member and a second connecting member, the first connecting member is fixedly arranged on the first connecting surface, the second connecting member is fixedly arranged on the second connecting surface, the first connecting member and the second connecting member are rotationally connected through a pivot axis, and a plurality of steel balls are sandwiched between the first connecting member and the second connecting member.

4. The transformable chair according to claim 3, characterized in that: The first positioning structure includes a spherical protrusion, the first connecting member includes a first main body and a first extension portion arranged on the first connecting surface, the first main body is provided with the first extension portion on opposite sides, the second connecting member includes a second main body and a second extension portion arranged on the second connecting surface, the second main body is provided with the second extension portion on opposite sides, one of the first extension portion and the second extension portion is provided with the spherical protrusion, and the other of the first extension portion and the second extension portion is provided with a positioning hole for cooperating with the spherical protrusion for positioning.

5. The transformable chair according to claim 1, characterized in that: The support structure includes two groups of support leg assemblies arranged side by side, and the support leg assemblies include a first support leg and a second support leg arranged at intervals. In the same group of the support leg assemblies, a first support beam and a second support beam are horizontally arranged between the first support leg and the second support leg. The first support beam is a hollow tubular structure, one end of the first support beam is an open end, the other end of the first support beam is fixedly connected to one of the first support leg and the second support leg, one end of the second support beam is fixedly connected to the other of the first support leg and the second support leg, and the other end of the second support beam is movably inserted into the first support beam through the open end of the first support beam.

6. The transformable chair according to claim 5, characterized in that: The support leg assembly also includes a second positioning structure arranged between the first support beam and the second support beam, and the second positioning structure is used to limit the movement of the second support beam relative to the first support beam along the axial direction of the first support beam and can release the restriction on the second support beam.

7. The transformable chair according to claim 6, characterized in that: The second positioning structure includes a latch assembly, which includes a latch, a compression spring and a sleeve with openings at both ends. A threaded through hole is provided on the first support beam, and the outer peripheral wall of the sleeve has a threaded connection structure and is threadedly connected to the threaded through hole. The latch is movably inserted into the sleeve along the axial direction of the sleeve, and a first limiting portion is provided at the portion of the latch located in the sleeve. A second limiting portion is provided at an end of the sleeve away from the first support beam. The compression spring is sleeved on the latch, one end of the compression spring abuts against the first limiting portion, and the other end of the compression spring abuts against the second limiting portion. The compression spring is used to provide an elastic force that drives the latch to extend into the first support beam. A third limiting portion for limiting the latch from being separated from the sleeve is provided at an end of the latch away from the first support beam and / or an end of the sleeve close to the first support beam. A plurality of plug holes distributed along the axial direction of the second support beam and used for cooperating with the latch for positioning are provided at intervals on the second support beam.

8. The transformable chair according to claim 7, characterized in that: The second limiting portion is annular, and is provided with an escape opening. The latch is provided with a clamping block penetrating the escape opening, and the clamping block and the first limiting portion are spaced apart from each other along the axial direction of the latch.

9. The transformable chair according to claim 7, characterized in that: A pull ring for applying force is provided at one end of the latch away from the first support beam.

10. The transformable chair according to claim 1, characterized in that: A headrest is arranged at one end of the backrest away from the seat cushion, and the headrest is located above the backrest when the backrest rotates to the second working position.

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