CN220293326U - Folding bed - Google Patents

Abstract

The utility model belongs to the technical field of furniture, specifically provide a folding bed, folding bed includes bed board subassembly and frame subassembly, the bed board subassembly includes first bed board, second bed board and third bed board, the relative both ends of second bed board rotate with first bed board and third bed board respectively and are connected, frame subassembly includes first frame, second frame and third frame, first frame and first bed board detachably butt, second frame and second bed board fixed connection, the relative both ends of second frame rotate with first frame and third frame respectively and are connected, third frame and third bed board detachably butt, first bed board, third bed board, first frame and third frame all can rotate and stack on one side that the second frame deviates from the second bed board. When the folding bed is required to be folded and stored, the bed board component and the frame component are not required to be detached, and the bed board component and the frame component can be avoided from being assembled when the folding bed is used next time, so that the folding bed is very convenient to use.

Description

Folding bed

Technical Field

The application belongs to the technical field of furniture, and particularly relates to a folding bed.

Background

The folding bed generally comprises a foldable bed frame and a foldable bed plate, and for the folding bed which can be folded twice in three sections, the bed frame and the bed plate are generally designed in a detachable mode, when the folding bed is folded and stored, the bed frame and the bed plate are required to be detached, then the bed frame and the bed plate are respectively folded, and when the folding bed is required to be used, the bed plate is required to be installed on the bed frame again, so that the folding bed is very inconvenient to use.

Disclosure of Invention

The utility model provides an aim at provides a folding bed aims at solving among the prior art when folding accomodating folding bed, needs to split bedstead and bed board, then fold bedstead and bed board respectively, when needs use folding bed, then need install the bed board on the bedstead again, uses very inconvenient technical problem.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows: the utility model provides a folding bed, including bed board subassembly and frame subassembly, the bed board subassembly includes first bed board, second bed board and third bed board, the relative both ends of second bed board rotate with first bed board and third bed board respectively and are connected, frame subassembly includes first frame, second frame and third frame, first frame and first bed board detachably butt, second frame and second bed board fixed connection, the relative both ends of second frame rotate with first frame and third frame respectively and are connected, third frame and third bed board detachably butt, first bed board, third bed board, first frame and third frame homoenergetic rotate and stack on the one side that the second frame deviates from the second bed board.

Further, when the folding bed is in the folded state, the first frame is located on a side of the second frame facing away from the second bed plate, the first bed plate is located on a side of the first frame facing away from the second frame, the third frame is located on a side of the first bed plate facing away from the first frame, and the third bed plate is located on a side of the third frame facing away from the first bed plate.

Further, the folding bed further comprises a first limiting piece and a second limiting piece, and the first limiting piece and the second limiting piece are arranged on the frame assembly; when the folding bed is in a folded state, the first limiting piece is at least partially clamped between the first frame and the second frame so that the first frame is completely separated from the second frame, and the second limiting piece is at least partially clamped between the second frame and the third frame so that the third frame is completely separated from the first bed board.

Further, the first limiting piece comprises an integrated first connecting part and a first limiting part, the opposite ends of the first connecting part are respectively connected with the first frame and the second frame in a rotating way, the second limiting piece comprises an integrated second connecting part and a second limiting part, and the opposite ends of the second connecting part are respectively connected with the second frame and the third frame in a rotating way; when the folding bed is in a folded state, the first limiting part is clamped between the first frame and the second frame, and the second limiting part is clamped between the second frame and the third frame.

Further, the first limiting piece further comprises a first positioning part, the first positioning part is integrated with the first connecting part, the second limiting piece further comprises a second positioning part, and the second positioning part is integrated with the second connecting part; when the folding bed is in an unfolding state, the opposite ends of the first positioning part are respectively abutted with the first frame and the second frame so that the first frame is flush with the second frame, and the opposite ends of the second positioning part are respectively abutted with the second frame and the third frame so that the second frame is flush with the third frame.

Further, the first bed board is provided with a first folding angle, the second bed board is provided with a second folding angle, the folding bed further comprises a first connecting piece and a second connecting piece which are rotationally connected, the first connecting piece is formed with a first clamping groove which is matched with the first folding angle in shape, the first folding angle is clamped into the first clamping groove and is fixedly connected with the first connecting piece, the second connecting piece is formed with a second clamping groove which is matched with the second folding angle in shape, and the second folding angle is clamped into the second clamping groove and is fixedly connected with the second connecting piece;

the second bed board is also provided with a third folding angle, the third bed board is provided with a fourth folding angle, the folding bed further comprises a third connecting piece and a fourth connecting piece which are rotationally connected, the third connecting piece is formed with a third clamping groove which is matched with the shape of the third folding angle, the third folding angle is clamped into the third clamping groove and is fixedly connected with the third connecting piece, the fourth connecting piece is formed with a fourth clamping groove which is matched with the shape of the fourth folding angle, and the fourth folding angle is clamped into the fourth clamping groove and is fixedly connected with the fourth connecting piece.

Further, the first connecting piece comprises a first fixing plate and a first mounting plate which are connected and intersected, the first fixing plate and the first mounting plate jointly define a first clamping groove, and the first fixing plate and the first mounting plate are respectively fixed on two intersected surfaces of the first folding angle; the second connecting piece comprises a second fixing plate and a second mounting plate which are connected and intersected, the second fixing plate and the second mounting plate jointly define a second clamping groove, and the second fixing plate and the second mounting plate are respectively fixed on two intersected surfaces of a second folding angle;

The third connecting piece comprises a third fixing plate and a third mounting plate which are connected and intersected, the third fixing plate and the third mounting plate jointly define a third clamping groove, and the third fixing plate and the third mounting plate are respectively fixed on two intersected surfaces of a third folding angle; the fourth connecting piece comprises a fourth fixing plate and a fourth mounting plate which are connected and intersected, a fourth clamping groove is defined by the fourth fixing plate and the fourth mounting plate together, and the fourth fixing plate and the fourth mounting plate are fixedly connected with the third bed plate.

Further, the first connecting piece further comprises a first connecting plate, the first connecting plate and the first fixing plate are respectively fixed on two opposite sides of the first mounting plate, the second connecting piece further comprises a second connecting plate, the second connecting plate and the second fixing plate are respectively fixed on two opposite sides of the second mounting plate, the first connecting plate is rotationally connected with the second connecting plate, and the included angle of the first connecting plate and the second connecting plate when the folding bed is in an unfolding state is smaller than the included angle of the first connecting plate and the second connecting plate when the folding bed is in a folding state;

the third connecting piece still includes the third connecting plate, and third connecting plate and third fixed plate are fixed respectively on the opposite sides of third mounting panel, and the fourth connecting piece still includes the fourth connecting plate, and fourth connecting plate and fourth fixed plate are fixed respectively on the opposite sides of fourth mounting panel, and the third connecting plate rotates with the fourth connecting plate to be connected, and the contained angle of third connecting plate and fourth connecting plate when folding bed is in the expansion state is less than the contained angle of third connecting plate and fourth connecting plate when folding bed is in the folding state.

Further, the folding bed further comprises a first telescopic piece, one end of the first telescopic piece is rotationally connected with the first bed board, the other end of the first telescopic piece is rotationally connected with the frame assembly or the second bed board, and the first telescopic piece can do telescopic motion in the length direction of the first telescopic piece.

Further, the bed board assembly further comprises a fourth bed board, the fourth bed board is rotatably connected to one end of the third bed board far away from the second bed board, and the fourth bed board is detachably abutted with the third frame;

the folding bed further comprises a second telescopic piece, one end of the second telescopic piece is rotationally connected with the third bed board, the other end of the second telescopic piece is rotationally connected with the frame assembly or the second bed board, and the second telescopic piece can do telescopic motion in the length direction of the second telescopic piece.

Compared with the prior art, the beneficial effect of folding bed that this application provided lies in: when folding the folding bed and accomodating, need not to come with bed board subassembly and frame subassembly split, only need rotate first bed board, third bed board, first frame and third frame respectively and fold on one side that the second frame deviates from the second bed board can, folding operation is very simple, can avoid the equipment of bed board subassembly and frame subassembly when using next time moreover, only need to expand first bed board, third bed board, first frame and third frame respectively to make first bed board and first frame butt, third bed board and third frame butt, can realize the comprehensive support of frame subassembly to bed board subassembly, it is very convenient to use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a folding bed according to an embodiment of the present disclosure in an unfolded state;

FIG. 2 is a schematic view of a folding bed according to an embodiment of the present disclosure during folding;

FIG. 3 is a schematic view of a folding bed according to an embodiment of the present disclosure in a folded state;

FIG. 4 is a bottom view of a folding bed according to an embodiment of the present disclosure in an unfolded state;

FIG. 5 is a schematic structural view of a frame assembly of a folding bed according to an embodiment of the present application;

FIG. 6 is an exploded view of the frame assembly shown in FIG. 5;

FIG. 7 is a schematic view of a bed board assembly of a folding bed according to an embodiment of the present disclosure;

fig. 8 is an exploded view of the deck assembly shown in fig. 7.

Wherein, each reference sign in the figure:

11. a first bed plate; 111. a first bevel; 12. a second bed plate; 121. a second bevel; 122. a third bevel; 13. a third bed plate; 131. a fourth folding angle; 14. a fourth bed plate;

21. A first frame; 211. a first fixed frame strip; 212. a first connecting frame strip; 2121. a first through hole; 22. a second frame; 221. a second connecting frame strip; 2211. a second through hole; 23. a third frame; 231. a third fixed frame strip; 232. a third connecting frame strip;

31. a first limiting member; 311. a first connection portion; 3111. a first connection hole; 3112. a second connection hole; 312. a first limit part; 313. a first positioning portion; 32. a second limiting piece; 321. a second connecting portion; 322. a second limit part; 323. a second positioning portion;

41. a first engagement member; 411. a first clamping groove; 412. a first fixing plate; 413. a first mounting plate; 414. a first connection plate; 4141. a first mounting hole; 42. a second engagement member; 421. a second clamping groove; 422. a second fixing plate; 423. a second mounting plate; 424. a second connecting plate; 4241. a second mounting hole; 43. a third engagement member; 431. a third clamping groove; 432. a third fixing plate; 433. a third mounting plate; 434. a third connecting plate; 4341. a third mounting hole; 44. a fourth engagement member; 441. a fourth clamping groove; 442. a fourth fixing plate; 443. a fourth mounting plate; 444. a fourth connecting plate; 4441. a fourth mounting hole;

51. A first penetrating member; 52. a second penetrating member; 53. a third penetrating member; 54. a fourth penetrating member;

61. a first telescopic member; 62. a second telescopic member;

71. bed legs.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Referring to fig. 1 to 3, the embodiment of the present application provides a folding bed, including a bed board assembly and a frame assembly, the bed board assembly includes a first bed board 11, a second bed board 12 and a third bed board 13, opposite ends of the second bed board 12 are respectively connected with the first bed board 11 and the third bed board 13 in a rotating manner, the frame assembly includes a first frame 21, a second frame 22 and a third frame 23, the first frame 21 is detachably abutted with the first bed board 11, the second frame 22 is fixedly connected with the second bed board 12, opposite ends of the second frame 22 are respectively connected with the first frame 21 and the third frame 23 in a rotating manner, the third frame 23 is detachably abutted with the third bed board 13, and the first bed board 11, the third bed board 13, the first frame 21 and the third frame 23 can be rotationally stacked on one side of the second frame 22, which is away from the second bed board 12.

The first frame 21 is detachably abutted to the first bed plate 11, which means that the first frame 21 is abutted to the bottom of the first bed plate 11 to provide support for the first bed plate 11 in the case of normal use of the folding bed, and when the folding bed is required to be folded and stored, the first bed plate 11 can be separated from the first frame 21 and can be independently rotated relative to the second bed plate 12. Similarly, the third frame 23 is detachably abutted with the third bed plate 13, that is, in the case of using the folding bed normally, the third frame 23 is abutted with the bottom of the third bed plate 13 to provide support for the third bed plate 13, and when the folding bed needs to be folded and stored, the third bed plate 13 can be separated from the third frame 23 and can independently rotate relative to the second bed plate 12.

When folding and containing are needed, the folding bed is not needed to be detached from the bed board assembly, only the first bed board 11, the third bed board 13, the first frame 21 and the third frame 23 are needed to be rotated and stacked on one side, deviating from the second bed board 12, of the second frame 22, folding operation is quite simple, the assembly of the bed board assembly and the frame assembly can be avoided when the folding bed is used next time, and the first bed board 11, the third bed board 13, the first frame 21 and the third frame 23 are needed to be unfolded respectively, and the first bed board 11 is abutted with the first frame 21, the third bed board 13 is abutted with the third frame 23, so that the comprehensive support of the frame assembly to the bed board assembly can be realized, and the folding bed is quite convenient to use. In addition, the bed board component and the frame component can be folded twice, so that the size of the folding bed is greatly reduced, and the folded folding bed meets the requirement of UPS express delivery.

In the embodiment of the application, the first bed board 11, the second bed board 12 and the third bed board 13 are sequentially arranged along the length direction of the bed board assembly, and support is provided for different parts of a human body respectively. Specifically, the first bed plate 11 may provide support for the back of the human body, the second bed plate 12 may provide support for the buttocks of the human body, and the third bed plate 13 may provide support for the legs of the human body.

It should be noted that, the sequence of the first frame 21 and the third frame 23 rotationally stacking on the second frame 22 is not limited, when the third frame 23 is folded before the first frame 21, the sequence of the first frame 21 and the third bed plate 13 rotationally stacking on the second frame 22 is not limited, and when the first frame 21 is folded before the third frame 23, the sequence of the first bed plate 11 and the third bed plate 23 rotationally stacking on the second frame 22 is not limited. The following will be further explained by taking the example in which the first frame 21, the first bed plate 11, the third frame 23, and the third bed plate 13 are sequentially rotatably stacked on the second frame 22:

when folding, the user firstly rotates and stacks the first frame 21 and the first bed board 11 which are positioned at the same end of the folding bed on the second frame 22 in sequence, then rotates and stacks the third frame 23 and the third bed board 13 which are positioned at the same end of the folding bed on the second frame 22 in sequence, the folding bed after being completely folded is characterized in that the first frame 21 is positioned on one side of the second frame 22, which is away from the second bed board 12, the first bed board 11 is positioned on one side of the first frame 21, which is away from the second frame 22, the third frame 23 is positioned on one side of the first bed board 11, which is away from the first bed board 11, and the third bed board 13 is positioned on one side of the third frame 23, which is away from the first bed board 11. When the folding bed is unfolded, the third bed plate 13 and the third frame 23 which are positioned at the same end of the folding bed are sequentially unfolded, then the first bed plate 11 and the first frame 21 which are positioned at the same end of the folding bed are sequentially unfolded, the first bed plate 11, the second bed plate 12 and the third bed plate 13 which are completely unfolded are flush, and the first frame 21, the second frame 22 and the third frame 23 are flush. The folding and unfolding mode can prevent a user from walking back and forth between two ends of the folding bed, and the folding and unfolding operation is simpler and more labor-saving.

In another embodiment of the present application, as shown in fig. 4, the first frame 21 includes a first fixing frame strip 211 and a plurality of first connecting frame strips 212, the first fixing frame strip 211 extends along a width direction of the folding bed, a plurality of first fixing frame strips 211 are arranged at intervals in parallel and all extend along a length direction of the folding bed, one end of the first fixing frame strip 211 is fixedly connected with the first fixing frame, and the other end of the first fixing frame strip 211 is rotatably connected with the second frame 22.

The second frame 22 includes a plurality of second connection frame strips 221 fixedly connected to the second bed board 12, the number of the second connection frame strips 221 is consistent with the number of the first connection frame strips 212, a plurality of second connection frame strips 221 are connected with a plurality of first connection frame strips 212 in a one-to-one correspondence manner, the second connection frame strips 221 extend in the same direction with the corresponding first connection frame strips 212, one end of each second connection frame strip 221 is rotationally connected with one end, far away from the first fixed frame strip 211, of the corresponding first connection frame strip 212, and the other end of each second connection frame strip 221 is rotationally connected with the third frame 23.

The third frame 23 includes a third fixed frame strip 231 and a plurality of third connection frame strips 232, the third fixed frame strip 231 extends along the width direction of the folding bed, the number of the third connection frame strips 232 is consistent with the number of the second connection frame strips 221, a plurality of third connection frame strips 232 are connected with a plurality of second connection frame strips 221 in a one-to-one correspondence manner, the third connection frame strips 232 extend in the same direction with the corresponding second connection frame strips 221, one end of the third connection frame strips 232 is rotationally connected with one end of the corresponding second connection frame strips 221 away from the first connection frame strips 212, and the other end of the third connection frame strips 232 is fixedly connected with the third fixed frame strips 231.

The first frame 21 is composed of a first fixing frame strip 211 and a plurality of first connecting frame strips 212, the second frame 22 is composed of a plurality of second connecting frame strips 221, the third frame 23 is composed of a third fixing frame strip 231 and a plurality of third connecting frame strips 232, and the bed plate assembly has the advantages of being simple in structure, easy to manufacture, low in processing cost and the like, in addition, the first fixing frame strips 211 can stabilize the positions of the first connecting frame strips 212, and the third fixing frame strips 231 can stabilize the positions of the third connecting frame strips 232, so that the support stability of the bed plate assembly is improved.

Specifically, the number of the first connection frame bars 212, the second connection frame bars 221, and the third connection frame bars 232 is two. The first fixing frame strip 211, the first connecting frame strip 212, the second connecting frame strip 221, the third fixing frame strip 231 and the third connecting frame strip 232 are all square pipe structures, and have the advantages of simple structure, easy manufacture, low processing cost and the like. The first fixing frame bar 211 is welded to the first connecting frame bar 212, the second connecting frame bar 221 is welded to the second bed plate 12, and the third fixing frame bar 231 is welded to the third connecting frame bar 232.

In another embodiment of the present application, as shown in fig. 3, the folding bed further comprises a first limiting member 31, the first limiting member 31 being provided on the frame assembly, the first limiting member 31 being at least partially clamped between the first frame 21 and the second frame 22 when the folding bed is in the folded state, such that the first frame 21 is completely separated from the second frame 22.

The first limiting piece 31 completely separates the overlapped first frame 21 from the second frame 22, so that collision between the first frame 21 and the second frame 22 in the transportation process can be avoided, the first frame 21 and the second frame 22 are protected, and the safety of the folding bed in transportation is improved.

In another embodiment of the present application, one end of the first limiting member 31 may be fixed to the first frame 21 of the frame assembly, and the other end of the first limiting member 31 is separated from the second frame 22 when the folding bed is in the unfolded state, and the end of the first limiting member 31 remote from the first frame 21 is abutted with the second frame 22 when the folding bed is in the folded state, thereby completely separating the first frame 21 from the second frame 22. Of course, one end of the first limiting member 31 may be fixed to the second frame 22 of the frame assembly, and the other end of the first limiting member 31 is separated from the first frame 21 when the folding bed is in the unfolded state, and the end of the first limiting member 31 remote from the second frame 22 abuts against the first frame 21 when the folding bed is in the folded state, thereby completely separating the first frame 21 from the second frame 22.

In another embodiment of the present application, as shown in fig. 5, the first limiting member 31 includes a first connecting portion 311 and a first limiting portion 312 that are integrated, opposite ends of the first connecting portion 311 are respectively rotatably connected with the first frame 21 and the second frame 22, and when the folding bed is in the folded state, opposite ends of the first limiting portion 312 are respectively abutted with the first frame 21 and the second frame 22, so that the first frame 21 is completely separated from the second frame 22.

In this embodiment, the first limiting member 31 can realize the relative rotation between the first frame 21 and the second frame 22 through the first connecting portion 311, and can completely separate the first frame 21 and the second frame 22 which are overlapped through the first limiting portion 312, and the first connecting portion 311 and the first limiting portion 312 are integrated, so that the device has the advantages of simple structure, easy manufacturing, high strength, good structural stability and the like.

In another embodiment of the present application, when the folding bed is in the folded state, the first limiting portion 312 makes the first frame 21 and the second frame 22 spaced apart in parallel, and the first connecting portion 311 is perpendicular to the first frame 21 and the second frame 22. It will be appreciated that in the case where the first frame 21 and the second frame 22 are parallel, when the fixed length of the first connecting portion 311 is perpendicular to the first frame 21 and the second frame 22, the interval between the first frame 21 and the second frame 22 is the largest, and when the first frame 21 and the second frame 22 slide relatively to each other and the first connecting portion 311 is no longer perpendicular to the first frame 21 and the second frame 22, the interval between the first frame 21 and the second frame 22 is reduced, but since the opposite ends of the first limiting portion 312 are respectively abutted to the first frame 21 and the second frame 22, the interval between the first frame 21 and the second frame 22 is limited to be reduced, so that the first frame 21 and the second frame 22 are prevented from sliding relatively during transportation, and the first connecting portion 311 is kept perpendicular to the first frame 21 and the second frame 22, thereby improving the stability and safety of the folding bed during transportation.

In another embodiment of the present application, as shown in fig. 6, one end of the first connecting portion 311 is provided with a first connecting hole 3111, the other end of the first connecting portion 311 is provided with a second connecting hole 3112, one end of the first frame 21 is provided with a first through hole 2121, one end of the second frame 22 is provided with a second through hole 2211, the folding bed further includes a first penetrating member 51 and a second penetrating member 52, the first penetrating member 51 penetrates the first connecting hole 3111 and the first through hole 2121, so that the first frame 21 can rotate around the first penetrating member 51 relative to the first connecting portion 311, and the second penetrating member 52 penetrates the second connecting hole 3112 and the second through hole 2211, so that the second frame 22 can rotate around the second penetrating member 52 relative to the first connecting portion 311.

In another embodiment of the present application, as shown in fig. 6, the first limiting member 31 includes two first connecting portions 311, the two first connecting portions 311 are disposed at opposite intervals, the first limiting member 312 is disposed between the two first connecting portions 311, the first connecting holes 3111 of the two first connecting portions 311 are communicated, the second connecting holes 3112 of the two first connecting portions 311 are communicated, the end portion, far away from the first fixing frame strip 211, of the first connecting frame strip 212 of the first frame 21 is provided with a first through hole 2121, the first connecting frame strip 212 is inserted between the two first connecting portions 311, so that the first through hole 2121 is communicated with the first connecting holes 3111, the first penetrating member 51 penetrates through the first through hole 2121 and the two first connecting holes 3111, one end of the second connecting frame strip 221 of the second frame 22 is provided with a second through hole 2211, the second connecting frame strip 221 is inserted between the two first connecting portions 311, so that the second through hole 2211 is communicated with the second connecting hole 3112, and the second penetrating member 52 penetrates through the two second through holes 3112.

Through setting up two first connecting portion 311 centre gripping in the relative both sides of first connection frame strip 212 and second connection frame strip 221, can make first frame 21 and first locating part 31 take place more steadily and be difficult for rocking when rotating relatively to and make second frame 22 and first locating part 31 take place more steadily and be difficult for rocking when rotating relatively.

Specifically, when the folding bed is in the folded state, one end of the first limiting portion 312 abuts against the first connection frame bar 212, and the other end of the first limiting portion 312 abuts against the second connection frame bar 221, so that the first frame 21 is completely separated from the second frame 22. The number of the first limiting parts 31 is identical to the number of the first connecting frame strips 212 and the second connecting frame strips 221, and each first limiting part 31 is connected with one first connecting frame strip 212 and one second connecting frame strip 221.

Specifically, the first penetrating member 51 includes a first bolt and a first nut, the first bolt is screwed with the first nut after passing through the first through hole 2121 and the two first coupling holes 3111 to prevent the first coupling frame bar 212 and the first coupling portion 311 from being separated from each other, and the second penetrating member 52 includes a second bolt and a second nut, and the second bolt is screwed with the second nut after passing through the second through hole 2211 and the two second coupling holes 3112 to prevent the second coupling frame bar 221 and the first coupling portion 311 from being separated from each other.

In another embodiment of the present application, as shown in fig. 5, the first limiting member 31 further includes a first positioning portion 313, where the first positioning portion 313 is integrated with the first connecting portion 311, and when the folding bed is in the unfolded state, opposite ends of the first positioning portion 313 respectively abut against the first frame 21 and the second frame 22, so that the first frame 21 is flush with the second frame 22.

Opposite ends of the first positioning portion 313 are respectively abutted against the first frame 21 and the second frame 22 of the folding bed in the unfolded state, so that the first frame 21 and the second frame 22 can be kept flush, the problem that collapse occurs due to reverse folding of the first frame 21 and the second frame 22 is avoided, and stability of the folding bed in the unfolded state is improved. In addition, the first positioning portion 313, the first limiting portion 312, and the first connecting portion 311 are integrally formed, and have the advantages of simple structure, easy manufacture, high strength, good structural stability, and the like. Specifically, when the folding bed is in the unfolded state, one end of the first positioning portion 313 abuts against the first connection frame bar 212, and the other end of the first positioning portion 313 abuts against the second connection frame bar 221, so that the first frame 21 and the second frame 22 are kept flush.

Specifically, the first connecting portion 311, the first limiting portion 312 and the first positioning portion 313 are all plate-shaped, and have a simple structure and easy manufacture, two ends in the length direction of the first connecting portion 311 are respectively connected with the first frame 21 and the second frame 22 in a rotating manner, two ends in the width direction of the first connecting portion 311 are respectively connected with the first limiting portion 312 and the first positioning portion 313, and the first limiting portion 312 and the first positioning portion 313 are both perpendicular to the first connecting portion 311.

In another embodiment of the present application, as shown in fig. 3, the folding bed further comprises a second stop 32, the second stop 32 being provided on the frame assembly, the second stop 32 being at least partially clamped between the second frame 22 and the third frame 23 when the folding bed is in the folded state, such that the third frame 23 is completely spaced apart from the first bed deck 11.

The third frame 23 is located on one side of the first bed board 11, which is away from the first frame 21, and the third frame 23 is completely separated from the first bed board 11 through the second limiting piece 32, so that collision between the third frame 23 and the first bed board 11 in the transportation process can be avoided, and the transportation safety of the folding bed is improved.

In another embodiment of the present application, one end of the second limiting member 32 may be fixed to the second frame 22 of the frame assembly, and when the folding bed is in the unfolded state, the other end of the second limiting member 32 is separated from the third frame 23, and when the folding bed is in the folded state, the end of the second limiting member 32 away from the second frame 22 abuts against the third frame 23, so that the third frame 23 is completely separated from the first bed board 11. Of course, one end of the second limiting member 32 may be fixed on the third frame 23 of the frame assembly, when the folding bed is in the unfolded state, the other end of the second limiting member 32 is separated from the second frame 22, and when the folding bed is in the folded state, the end of the second limiting member 32 away from the third frame 23 abuts against the second frame 22, so that the third frame 23 is completely separated from the first bed board 11.

In another embodiment of the present application, as shown in fig. 5, the second limiting member 32 includes an integrated second connecting portion 321 and second limiting portion 322, opposite ends of the second connecting portion 321 are respectively rotatably connected to the second frame 22 and the third frame 23, and when the folding bed is in the folded state, the second limiting portion 322 is clamped between the second frame 22 and the third frame 23.

In this embodiment of the application, the second limiting part 32 can realize the relative rotation of the second frame 22 and the third frame 23 through the second connecting part 321, and can completely separate the third frame 23 and the first bed board 11 through the second limiting part 322, and the second connecting part 321 and the second limiting part 322 are integrated, so that the device has the advantages of simple structure, easy manufacture, high strength, good structural stability and the like.

Specifically, one end of the second connecting portion 321 is rotatably connected to the second connecting frame bar 221, and the other end of the second connecting portion 321 is rotatably connected to the third connecting frame bar 232, and when the folding bed is in the folded state, one end of the second limiting portion 322 abuts against the second connecting frame bar 221, and the other end of the second limiting portion 322 abuts against the third connecting frame bar 232, so that the third frame 23 is completely separated from the first bed board 11. The number of the second limiting members 32 is equal to the number of the second connecting frame strips 221 and the third connecting frame strips 232, and two second limiting members 32 are connected with one second connecting frame strip 221 and one third connecting frame strip 232.

In another embodiment of the present application, the second limiting part 322 makes the second frame 22 spaced apart from the third frame 23 in parallel when the folding bed is in the folded state, and the second connecting part 321 is perpendicular to the second frame 22 and the third frame 23. It will be appreciated that in the case where the second frame 22 is parallel to the third frame 23, when the fixed length of the second connecting portion 321 is perpendicular to the second frame 22 and the third frame 23, the interval between the second frame 22 and the third frame 23 is the largest, and when the second frame 22 and the third frame 23 slide relatively to each other and the second connecting portion 321 is no longer perpendicular to the second frame 22 and the third frame 23, the interval between the second frame 22 and the third frame 23 is reduced, but since the opposite ends of the second limiting member 32 are respectively abutted to the second frame 22 and the third frame 23, the interval between the second frame 22 and the third frame 23 can be limited, so that the second connecting portion 321 is prevented from sliding relatively to the second frame 22 and the third frame 23 during transportation, and stability and safety of the folding bed during transportation are improved.

In another embodiment of the present application, as shown in fig. 5, the second limiting member 32 further includes a second positioning portion 323, where the second positioning portion 323 is integrated with the second connecting portion 321, and when the folding bed is in the unfolded state, opposite ends of the second positioning portion 323 respectively abut against the second frame 22 and the third frame 23, so that the second frame 22 is flush with the third frame 23.

When the folding bed is in a folding state, one end of the second positioning part 323 is abutted with the second connecting frame strip 221, and the other end of the second positioning part 323 is abutted with the third connecting frame strip 232, so that the second frame 22 and the third frame 23 can be kept flush, the problem that the second frame 22 and the third frame 23 are reversely folded to collapse is avoided, and the stability of the folding bed in an unfolding state is improved. In addition, the second positioning portion 323, the second limiting portion 322, and the second connecting portion 321 are integrally formed, and have the advantages of simple structure, easy manufacture, high strength, good structural stability, and the like.

Specifically, when the folding bed is in the unfolded state, one end of the second positioning portion 323 abuts against the second connection frame bar 221, and the other end of the second positioning portion 323 abuts against the third connection frame bar 232, so that the second frame 22 is flush with the third frame 23. The second connecting portion 321, the second limiting portion 322 and the second positioning portion 323 are all flat, simple in structure and easy to manufacture, two ends in the length direction of the second connecting portion 321 are respectively connected with the second frame 22 and the third frame 23 in a rotating mode, two ends in the width direction of the second connecting portion 321 are respectively connected with the second limiting portion 322 and the second positioning portion 323, and the second limiting portion 322 and the second positioning portion 323 are perpendicular to the second connecting portion 321.

In another embodiment of the present application, as shown in fig. 7 and 8, the first bed board 11 has a first folding angle 111, the second bed board 12 has a second folding angle 121, the folding bed further includes a first connecting piece 41 and a second connecting piece 42 which are rotatably connected, the first connecting piece 41 forms a first clamping slot 411 adapted to the shape of the first folding angle 111, the first folding angle 111 is clamped into the first clamping slot 411 and is fixedly connected with the first connecting piece 41, the second connecting piece 42 is formed with a second clamping slot 421 adapted to the shape of the second folding angle 121, and the second folding angle 121 is clamped into the second clamping slot 421 and is fixedly connected with the second connecting piece 42.

First draw-in groove 411 and first dog-ear 111 shape looks adaptation, when first dog-ear 111 card goes into in the first draw-in groove 411, the cell wall of first draw-in groove 411 can closely laminate in first dog-ear 111, plays certain limiting displacement to first dog-ear 111 to make the connection of first link 41 and first bed board 11 more stable. Specifically, during installation, the first hinge 111 is first clamped into the first clamping slot 411, then the first connecting piece 41 and the first bed board 11 are fixed, the fixing mode is not limited, and the fixing mode can be screw fixing, welding fixing or the like, and the first connecting piece 41 and the first bed board 11 are not easy to shift when the first hinge 111 is clamped into the first clamping slot 411, so that the first connecting piece 41 is conveniently and accurately fixed on the first bed board 11. The principle and the beneficial effects of the second slot 421 and the second corner 121 can be explained by the first slot 411 and the first corner 111, which are not described herein.

In another embodiment of the present application, as shown in fig. 7 and 8, the first engagement member 41 includes a first fixing plate 412 and a first mounting plate 413 connected and intersecting, the first fixing plate 412 and the first mounting plate 413 together defining a first slot 411, the first fixing plate 412 and the first mounting plate 413 being fixed to two intersecting surfaces of the first folded angle 111, respectively; the second connecting piece 42 includes a second fixing plate 422 and a second mounting plate 423 that are connected and intersected, the second fixing plate 422 and the second mounting plate 423 together define a second clamping groove 421, and the second fixing plate 422 and the second mounting plate 423 are respectively fixed on two intersecting surfaces of the second folding angle 121.

When the first corner 111 is engaged in the first engaging slot 411, the first fixing plate 412 and the first mounting plate 413 respectively abut against two intersecting surfaces of the first corner 111, thereby forming two intersecting-direction stoppers. The angle between the first fixing plate 412 and the first mounting plate 413 depends on the first folding angle 111, and the first folding angle 111 is a right angle, and then the first fixing plate 412 is perpendicular to the first mounting plate 413, and forms an angle of 90 ° to adapt to the shape of the first folding angle 111. The first fixing plate 412 and the first mounting plate 413 are respectively fixed on two intersecting surfaces of the first folding angle 111 by means of screw fixation or welding fixation, etc., so that the connection reliability of the first connecting piece 41 and the first bed plate 11 is ensured. The principle of the cooperation of the second fixing plate 422, the second mounting plate 423 and the second corner 121 and the beneficial effects thereof can be explained by adopting the cooperation of the first fixing plate 412, the first mounting plate 413 and the first corner 111, and the description thereof will not be repeated here.

In another embodiment of the present application, as shown in fig. 3, 7 and 8, the first connecting member 41 further includes a first connecting plate 414, the first connecting plate 414 and the first fixing plate 412 are respectively fixed on opposite sides of the first mounting plate 413, the second connecting member 42 further includes a second connecting plate 424, the second connecting plate 424 and the second fixing plate 422 are respectively fixed on opposite sides of the second mounting plate 423, the first connecting plate 414 is rotationally connected with the second connecting plate 424, and an included angle between the first connecting plate 414 and the second connecting plate 424 when the folding bed is in the unfolded state is smaller than an included angle between the first connecting plate 414 and the second connecting plate 424 when the folding bed is in the folded state.

When the folding bed is in the unfolded state, the included angle between the first connecting plate 414 and the second connecting plate 424 is smaller, and the distance between the first bed plate 11 and the second bed plate 12 is smaller, namely the splicing of the first bed plate 11 and the second bed plate 12 is more compact, so that most parts of the body of a user can be supported; when the folding bed is in a folded state, the included angle between the first connecting plate 414 and the second connecting plate 424 is larger, and the distance between the first bed plate 11 and the second bed plate 12 is also larger, so that a larger storage space is provided for the second frame 22 and the first frame 21 stacked between the first bed plate 11 and the second bed plate 12.

In another embodiment of the present application, as shown in fig. 7 and 8, the first connecting plate 414 is perpendicular to the first fixing plate 412, one end of the first connecting plate 414 is fixedly connected with the first fixing plate 412, the other end of the first connecting plate 414 is provided with a first mounting hole 4141, the second connecting plate 424 is perpendicular to the second fixing plate 422 and is parallel to the first connecting plate 414, one end of the second connecting plate 424 is fixedly connected with the second fixing plate 422, the other end of the second connecting plate 424 is provided with a second mounting hole 4241, the folding bed further comprises a third penetrating member 53, and the third penetrating member 53 penetrates the first mounting hole 4141 and the second mounting hole 4241, so that the first connecting plate 414 and the second connecting plate 424 can rotate around the third penetrating member 53 relatively.

In this embodiment, the number of the first engaging members 41 may be plural, the plural first engaging members 41 are disposed along the length direction of the first corners 111 at intervals, the number of the second engaging members 42 is the same as the number of the first engaging members 41, the plural second engaging members 42 are disposed along the length direction of the second corners 121 at intervals, and the plural second engaging members 42 are connected with the plural first engaging members 41 in one-to-one correspondence.

In another embodiment of the present application, as shown in fig. 7 and 8, the second bed board 12 further has a third folding corner 122, the third bed board 13 has a fourth folding corner 131, the folding bed further includes a third connecting piece 43 and a fourth connecting piece 44 which are rotatably connected, the third connecting piece 43 is formed with a third clamping groove 431 adapted to the shape of the third folding corner 122, the third folding corner 122 is clamped into the third clamping groove 431 and fixedly connected with the third connecting piece 43, the fourth connecting piece 44 is formed with a fourth clamping groove 441 adapted to the shape of the fourth folding corner 131, and the fourth folding corner 131 is clamped into the fourth clamping groove 441 and fixedly connected with the fourth connecting piece 44.

The principle and the beneficial effect of the third slot 431 and the third corner 122 can be explained by the first slot 411 and the first corner 111, and the principle and the beneficial effect of the fourth slot 441 and the fourth corner 131 can be explained by the first slot 411 and the first corner 111, which are not described herein.

In another embodiment of the present application, as shown in connection with fig. 7 and 8, the third engagement member 43 includes a third fixing plate 432 and a third mounting plate 433 that are connected and intersecting, the third fixing plate 432 and the third mounting plate 433 together defining a third clamping groove 431, the third fixing plate 432 and the third mounting plate 433 being respectively fixed on two intersecting faces of the third folded angle 122; the fourth engagement member 44 includes a fourth fixing plate 442 and a fourth mounting plate 443 that are connected and intersecting, and the fourth fixing plate 442 and the fourth mounting plate 443 together define a fourth clamping groove 441, and the fourth fixing plate 442 and the fourth mounting plate 443 are respectively fixed on two intersecting surfaces of the fourth folded angle 131.

The principle and the beneficial effects of the third fixing plate 432, the third mounting plate 433 and the third corner 122 can be explained by the above-mentioned first fixing plate 412, the first mounting plate 413 and the first corner 111, and the principle and the beneficial effects of the fourth fixing plate 442, the fourth mounting plate 443 and the fourth corner 131 can be explained by the above-mentioned first fixing plate 412, the first mounting plate 413 and the first corner 111, which are not repeated here.

In another embodiment of the present application, as shown in fig. 3, 7 and 8, the third connecting member 43 further includes a third connecting plate 434, the third connecting plate 434 and the third fixing plate 432 are respectively fixed on opposite sides of the third mounting plate 433, the fourth connecting member 44 further includes a fourth connecting plate 444, the fourth connecting plate 444 and the fourth fixing plate 442 are respectively fixed on opposite sides of the fourth mounting plate 443, the third connecting plate 434 is rotatably connected with the fourth connecting plate 444, and an included angle between the third connecting plate 434 and the fourth connecting plate 444 when the folding bed is in the unfolded state is smaller than an included angle between the third connecting plate 434 and the fourth connecting plate 444 when the folding bed is in the folded state.

When the folding bed is in an unfolding state, the included angle between the third connecting plate 434 and the fourth connecting plate 444 is smaller, and the distance between the second bed plate 12 and the third bed plate 13 is smaller, namely the splicing of the second bed plate 12 and the third bed plate 13 is more compact, so that most parts of the body of a user can be supported; when the folding bed is in the folded state, the included angle between the third connecting plate 434 and the fourth connecting plate 444 is larger, and the distance between the second bed plate 12 and the third bed plate 13 is also larger, so that a larger storage space is provided for the second frame 22, the first frame 21, the first bed plate 11 and the third frame 23 which are stacked between the second bed plate 12 and the third bed plate 13.

In another embodiment of the present application, as shown in fig. 7 and 8, the third connecting plate 434 is perpendicular to the third fixing plate 432, one end of the third connecting plate 434 is fixedly connected with the third fixing plate 432, the other end of the third connecting plate 434 is provided with a third mounting hole 4341, the fourth connecting plate 444 is perpendicular to the fourth fixing plate 442 and is attached to the third connecting plate 434 in parallel, one end of the fourth connecting plate 444 is fixedly connected with the fourth fixing plate 442, the other end of the fourth connecting plate 444 is provided with a fourth mounting hole 4441, the folding bed further includes a fourth penetrating member 54, and the fourth penetrating member 54 penetrates the third mounting hole 4341 and the fourth mounting hole 4441, so that the third connecting plate 434 and the fourth connecting plate 444 can rotate around the fourth penetrating member 54 relatively.

In this embodiment, the number of the third engaging members 43 may be plural, the plural third engaging members 43 are disposed along the length direction of the third folding angle 122 at intervals, the number of the fourth engaging members 44 is the same as the number of the third engaging members 43, the plural fourth engaging members 44 are disposed along the length direction of the fourth folding angle 131 at intervals, and the plural fourth engaging members 44 are connected with the plural third engaging members 43 in one-to-one correspondence.

In another embodiment of the present application, as shown in fig. 4, the folding bed further includes a first telescopic member 61, one end of the first telescopic member 61 is rotatably connected to the first bed board 11, the other end of the first telescopic member 61 is rotatably connected to the frame assembly or the second bed board 12, and the first telescopic member 61 can perform telescopic movement in the length direction thereof, so as to drive the first bed board 11 to rotate relative to the frame assembly or the second bed board 12.

In this embodiment of the present application, the first bed board 11 may be used to support the back of the human body, and when the folding bed is in the unfolded state, the first telescopic member 61 performs telescopic motion along the length direction thereof, so as to push the first bed board 11 to rotate relative to the frame assembly or the second bed board 12, thereby realizing the adjustment of the support angle of the first bed board 11 to the back of the human body. Specifically, one end of the first telescopic member 61 is rotationally connected with the first bed board 11, and the other end of the first telescopic member 61 is rotationally connected with the second bed board 12, and when the first telescopic member 61 is in an initial state, the first bed board 11 is abutted with the first frame 21, and the first bed board 11 is in a horizontal state, so that the requirement of lying down of a user is met. When the first telescopic member 61 makes an extension movement, the first telescopic member 61 can push the first bed plate 11 to rotate upwards, so that the support angle of the first bed plate 11 to the back of the human body is increased, and conversely, when the first telescopic member 61 makes a shortening movement, the first telescopic member 61 can pull the first bed plate 11 to rotate downwards, so that the support angle of the first bed plate 11 to the back of the human body is reduced.

Specifically, when the folding bed is in the unfolded state, the first connecting plate 414 and the second connecting plate 424 form a V shape, which can provide a space for the first bed plate 11 to rotate upwards, and when the first bed plate 11 rotates upwards, the included angle between the first connecting plate 414 and the second connecting plate 424 becomes smaller.

Specifically, the first telescopic member 61 includes a driver and a push rod, one end of the push rod is rotatably connected to the first bed plate 11, the other end of the push rod extends into the driver, and the driver is rotatably connected to the second bed plate 12 and is capable of driving the push rod to reciprocate in a linear motion.

In another embodiment of the present application, referring to fig. 1 to 4, the bed board assembly further includes a fourth bed board 14, the fourth bed board 14 is rotatably connected to one end of the third bed board 13 away from the second bed board 12, the fourth bed board 14 is detachably abutted to the third frame 23, the folding bed further includes a second telescopic member 62, one end of the second telescopic member 62 is rotatably connected to the third bed board 13, the other end of the second telescopic member 62 is rotatably connected to the frame assembly or the second bed board 12, the second telescopic member 62 can perform telescopic motion in the length direction thereof to drive the third bed board 13 to rotate relative to the frame assembly or the second bed board 12, and the fourth bed board 14 can rotate along with the rotation of the third bed board 13.

In this embodiment of the present application, the third bed board 13 is used for supporting the shank of human body, the fourth bed board 14 is used for supporting the foot of human body, when folding, the fourth bed board 14 stacks on the side that the third frame 23 deviates from first bed board 11 along with the third bed board 13 together, under the state that folding bed is in the expansion, the second telescopic member 62 is telescopic motion along its length direction, can promote the relative frame assembly of third bed board 13 or second bed board 12 rotation, realize the adjustment to the supporting angle of shank of human body, the third bed board 13 can drive the fourth bed board 14 rotation again when rotating, thereby realize the adjustment to the supporting angle of the foot of human body. Specifically, one end of the second telescopic member 62 is rotatably connected to the third bed plate 13, the other end of the third telescopic member is rotatably connected to the third frame 23, when the second telescopic member 62 is in the initial state, the third bed plate 13 and the fourth bed plate 14 are both abutted to the third frame 23, the third bed plate 13 and the fourth bed plate 14 are both in the horizontal state, and the legs of the user can be placed on the third bed plate 13 and the fourth bed plate 14 in a flat state. When the second telescopic member 62 performs an extending motion, the second telescopic member 62 pushes the third bed plate 13 to rotate upwards, the third bed plate 13 drives the fourth bed plate 14 to rotate, the third bed plate 13 and the fourth bed plate 14 form an inverted V-shaped structure, and the legs of the user can be placed on the third bed plate 13 and the fourth bed plate 14 in a bending mode. The longer the second expansion piece 62 is, the closer the third bed plate 13 and the fourth bed plate 14 are to the vertical state, and conversely, the shorter the second expansion piece 62 is, the closer the third bed plate 13 and the fourth bed plate 14 are to the horizontal state.

Specifically, when the folding bed is in the unfolded state, the third connecting plate 434 and the fourth connecting plate 444 form a V shape, which can provide a space for the third bed plate 13 to rotate upwards, and when the third bed plate 13 rotates upwards, the included angle between the third connecting plate 434 and the fourth connecting plate 444 becomes smaller.

In another embodiment of the present application, as shown in connection with fig. 1, the folding bed further comprises a bed leg 71, the bed leg 71 being detachably connected to the frame assembly.

Specifically, as shown in fig. 4, the number of the legs 71 is six, two legs 71 are connected to the first fixing frame bar 211 of the first frame 21, one leg 71 is connected to each of the two second connecting frame bars 221 of the second frame 22, and two legs 71 are connected to the third fixing frame bar 231 of the third frame 23.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims (10)

1. A folding bed, comprising:

the bed board assembly comprises a first bed board, a second bed board and a third bed board, and the opposite ends of the second bed board are respectively connected with the first bed board and the third bed board in a rotating way;

The frame assembly comprises a first frame, a second frame and a third frame, wherein the first frame is in detachable butt joint with the first bed plate, the second frame is fixedly connected with the second bed plate, two opposite ends of the second frame are respectively connected with the first frame and the third frame in a rotating mode, the third frame is in detachable butt joint with the third bed plate, and the first bed plate, the third bed plate, the first frame and the third frame can be rotationally stacked on one side, deviating from the second bed plate, of the second frame.

2. The folding bed of claim 1, wherein: when the folding bed is in a folded state, the first frame is located on one side of the second frame, which is away from the second bed plate, the first bed plate is located on one side of the first frame, which is away from the second frame, the third frame is located on one side of the first bed plate, which is away from the first frame, and the third bed plate is located on one side of the third frame, which is away from the first bed plate.

3. The folding bed of claim 2, wherein: the folding bed further comprises a first limiting piece and a second limiting piece, and the first limiting piece and the second limiting piece are arranged on the frame assembly; when the folding bed is in a folded state, the first limiting member is at least partially clamped between the first frame and the second frame such that the first frame is completely spaced apart from the second frame, and the second limiting member is at least partially clamped between the second frame and the third frame such that the third frame is completely spaced apart from the first bed deck.

4. A folding bed according to claim 3, characterized in that: the first limiting piece comprises an integrated first connecting part and a first limiting part, two opposite ends of the first connecting part are respectively connected with the first frame and the second frame in a rotating way, the second limiting piece comprises an integrated second connecting part and a second limiting part, and two opposite ends of the second connecting part are respectively connected with the second frame and the third frame in a rotating way; when the folding bed is in a folded state, the first limiting portion is clamped between the first frame and the second frame, and the second limiting portion is clamped between the second frame and the third frame.

5. The folding bed of claim 4, wherein: the first limiting piece further comprises a first positioning part, the first positioning part is integrated with the first connecting part, the second limiting piece further comprises a second positioning part, and the second positioning part is integrated with the second connecting part; when the folding bed is in an unfolding state, the opposite ends of the first positioning part are respectively abutted with the first frame and the second frame so that the first frame is flush with the second frame, and the opposite ends of the second positioning part are respectively abutted with the second frame and the third frame so that the second frame is flush with the third frame.

6. The folding bed of claim 2, wherein: the first bed board is provided with a first folding angle, the second bed board is provided with a second folding angle, the folding bed further comprises a first connecting piece and a second connecting piece which are rotationally connected, the first connecting piece is formed with a first clamping groove which is matched with the first folding angle in shape, the first folding angle is clamped into the first clamping groove and is fixedly connected with the first connecting piece, the second connecting piece is formed with a second clamping groove which is matched with the second folding angle in shape, and the second folding angle is clamped into the second clamping groove and is fixedly connected with the second connecting piece;

the second bed board is further provided with a third folding angle, the third bed board is provided with a fourth folding angle, the folding bed further comprises a third connecting piece and a fourth connecting piece which are connected in a rotating mode, the third connecting piece is formed with a third clamping groove which is matched with the shape of the third folding angle, the third folding angle is clamped into the third clamping groove and is fixedly connected with the third connecting piece, the fourth connecting piece is formed with a fourth clamping groove which is matched with the shape of the fourth folding angle, and the fourth folding angle is clamped into the fourth clamping groove and is fixedly connected with the fourth connecting piece.

7. The folding bed of claim 6, wherein: the first connecting piece comprises a first fixing plate and a first mounting plate which are connected and intersected, the first fixing plate and the first mounting plate jointly define the first clamping groove, and the first fixing plate and the first mounting plate are respectively fixed on two intersected surfaces of the first folding angle; the second connecting piece comprises a second fixing plate and a second mounting plate which are connected and intersected, the second fixing plate and the second mounting plate jointly define the second clamping groove, and the second fixing plate and the second mounting plate are respectively fixed on two intersected surfaces of the second folding angle;

the third connecting piece comprises a third fixing plate and a third mounting plate which are connected and intersected, the third fixing plate and the third mounting plate jointly define a third clamping groove, and the third fixing plate and the third mounting plate are respectively fixed on two intersected surfaces of the third folding angle; the fourth connecting piece comprises a fourth fixing plate and a fourth mounting plate which are connected and intersected, the fourth fixing plate and the fourth mounting plate jointly define a fourth clamping groove, and the fourth fixing plate and the fourth mounting plate are fixedly connected with the third bed plate.

8. The folding bed of claim 7 wherein: the first connecting piece further comprises a first connecting plate, the first connecting plate and the first fixing plate are respectively fixed on two opposite sides of the first mounting plate, the second connecting piece further comprises a second connecting plate, the second connecting plate and the second fixing plate are respectively fixed on two opposite sides of the second mounting plate, the first connecting plate is rotationally connected with the second connecting plate, and an included angle of the first connecting plate and the second connecting plate when the folding bed is in an unfolding state is smaller than an included angle of the first connecting plate and the second connecting plate when the folding bed is in a folding state;

the third connecting piece still includes the third connecting plate, the third connecting plate with the third fixed plate is fixed respectively on the opposite sides of third mounting panel, the fourth connecting piece still includes the fourth connecting plate, the fourth connecting plate with the fourth fixed plate is fixed respectively on the opposite sides of fourth mounting panel, the third connecting plate with the fourth connecting plate rotates to be connected, the third connecting plate with the fourth connecting plate is in the contained angle of folding bed when expanding the state is less than the third connecting plate with the fourth connecting plate is in the contained angle of folding bed when folding the state.

9. The folding bed according to any one of claims 1 to 8, wherein: the folding bed further comprises a first telescopic piece, one end of the first telescopic piece is rotationally connected with the first bed board, the other end of the first telescopic piece is rotationally connected with the frame assembly or the second bed board, and the first telescopic piece can do telescopic motion in the length direction of the first telescopic piece so as to drive the first bed board to rotate relative to the frame assembly or the second bed board.

10. The folding bed according to any one of claims 1 to 8, wherein: the bed board assembly further comprises a fourth bed board which is rotatably connected to one end of the third bed board far away from the second bed board, and the fourth bed board is detachably abutted with the third frame;

the folding bed further comprises a second telescopic piece, one end of the second telescopic piece is rotationally connected with the third bed plate, the other end of the second telescopic piece is rotationally connected with the frame assembly or the second bed plate, the second telescopic piece can do telescopic motion in the length direction of the second telescopic piece so as to drive the third bed plate to rotate relative to the frame assembly or the second bed plate, and the fourth bed plate can also rotate along with the rotation of the third bed plate.