CN110432688B

CN110432688B - Portable folding bed

Info

Publication number: CN110432688B
Application number: CN201810412303.2A
Authority: CN
Inventors: 钱品兴; 钱珊珊
Original assignee: Shanghai Pinxing Technology Co ltd
Current assignee: Shanghai Pinxing Technology Co ltd
Priority date: 2018-05-03
Filing date: 2018-05-03
Publication date: 2021-08-03
Anticipated expiration: 2038-05-03
Also published as: CN110432688A

Abstract

The invention relates to the technical field of folding beds, in particular to a portable folding bed, which is characterized in that: comprises folding supporting legs; the folding supporting legs comprise 2 first arms, 2 second arms and a supporting bottom rod; the bottom ends of the 2 first arms are rotatably connected with the supporting bottom rod; the bottom ends of the 2 second arms are respectively positioned among the 2 first arms and are rotatably connected with the supporting bottom rod; the top ends of the 2 second arms are at least provided with embedded plugs which are right-angled with the second arms; the top ends of the first arms of the 2 folding supporting legs are respectively and rotatably connected with the left side frame and the right side frame of the corresponding upper half bed frame and the left side frame and the right side frame of the corresponding lower half bed frame; the inner sides of the left side frame and the right side frame of the upper half bed frame and the inner sides of the left side frame and the right side frame of the lower half bed frame are respectively provided with an embedded plug accommodating groove with an opening at the lower end, and the embedded plugs of the second arms of the 2 folding supporting legs are respectively connected with the corresponding embedded plug accommodating grooves in a nested manner. Compared with the prior art, the invention has simple structure and convenient use; the structure is succinct and can compromise beautifully after accomodating.

Description

Portable folding bed

Technical Field

The invention relates to the technical field of folding beds, in particular to a portable folding bed.

Background

Because of needs of camping, marching and the like, the folding bed which is convenient to carry is generally needed. Due to the particularity of the use, particularly in the marching process, the ICU treatment bed not only needs to be conveniently and quickly unfolded and stored, but also needs to be as light and simple as possible in weight structure, and even needs to be conveniently formed.

At present, folding beds in the market are also various, and some folding beds are too simple in structure, so that the comfort is not enough, for example, only flexible fabrics are arranged on some folding support legs; or a folding frame with a bed board is adopted without a support, so that the sleeping temperature is too low due to the fact that the folding frame is too close to the ground, and crawlers on the ground can easily climb up to the bed; and the structure is too complex, so that the volume is too large after the storage, the use is inconvenient, the appearance is not simple and beautiful enough, and the use is not very desirable.

Disclosure of Invention

The foldable support leg aims to overcome the defects of the prior art, adopts the foldable support leg which is simple in structure and can be stored on the basis of a simple foldable bed frame with a bed board, is convenient to unfold for use, and can be stored conveniently to form a structure similar to a square, so that the appearance of the foldable bed frame is concise and attractive.

In order to achieve the purpose, the portable folding bed comprises a foldable bed frame, a foldable bed board and folding supporting legs, wherein the foldable bed frame comprises an upper half bed frame and a lower half bed frame which can be opened and closed mutually; at least one end of the lower bed board is connected with the folding end of the lower bed frame, and the lower bed board is characterized in that:

the lower parts of the upper half bed frame and the lower half bed frame are respectively connected with a folding supporting leg in a rotating way;

the folding supporting legs comprise 2 first arms, 2 second arms and a supporting bottom rod; the bottom ends of the 2 first arms are rotatably connected with the supporting bottom rod; the bottom ends of the 2 second arms are respectively positioned between the 2 first arms and are rotationally connected with the supporting bottom rod, and the first arms and the second arms respectively rotate around the central axis of the supporting bottom rod; the top ends of the 2 second arms are at least provided with inserting heads which are right-angled with the second arms, and the inserting heads face to the outside;

the top ends of the first arms of the 2 folding supporting legs are respectively and rotatably connected with the left side frame and the right side frame of the corresponding upper half bed frame and the left side frame and the right side frame of the corresponding lower half bed frame; the inner sides of the left and right side frames of the upper half bed frame and the inner sides of the left and right side frames of the lower half bed frame are respectively provided with an embedded plug accommodating groove with an opening at the lower end;

when the foldable bed frame is unfolded to be horizontal, the embedded plugs of the second arms of the 2 foldable supporting legs are respectively connected with the corresponding embedded plug accommodating grooves in an embedded mode, and the foldable supporting legs are made to be inverted triangular; when the foldable bed frame is folded in, the 2 second arms are respectively separated from the corresponding embedded plug accommodating grooves and then rotate along the respective supporting bottom rods to be jointed and folded towards the corresponding first arms, at the moment, the back of the upper half bed frame is jointed with the back of the lower half bed frame in an opposite direction, a space is reserved between the back of the upper bed plate and the back of the lower bed plate, and therefore an accommodating cavity for accommodating the 2 folded supporting legs is formed between the upper bed plate and the lower bed plate.

The device also comprises 2U-shaped groove concave blocks and 2U-shaped groove convex blocks;

the U-shaped groove lug adopts a first right-angle block with a long side face and a short side face, the top face of the first right-angle block is flush, a first U-shaped groove is arranged on the top face of the first right-angle block, an n-shaped groove used as an inserting head accommodating groove is arranged on the lower half part of the short side face of the U-shaped groove lug, and the long side face of the U-shaped groove lug is arranged into a tongue structure;

the U-shaped groove concave block adopts a second right-angle block with a long side face and a short side face, the top face of the second right-angle block is flush, a second U-shaped groove is arranged on the top face of the second right-angle block, and the lower half part of the short side face of the U-shaped groove concave block is provided with another 'n' -shaped groove which is used as the embedded plug accommodating groove; the long side surface of the U-shaped groove concave block is provided with a mortise with an opening at the lower end;

the first U-shaped grooves of the 2U-shaped groove convex blocks and the second U-shaped grooves of the 2U-shaped groove concave blocks are respectively nested at the lower parts of the left side frame and the right side frame of the upper half bed frame and the lower half bed frame;

when the foldable bed frame is folded, the tenon structure of the U-shaped groove convex block is embedded in the tenon groove of the U-shaped groove concave block.

The two ends of the second arm connecting rod are respectively connected with 2 second arms.

The two ends of the second arm connecting rod are respectively connected with the middle parts of the 2 second arms;

or the embedded plug is arranged on a T-shaped three-way pipe, the vertical passage of the T-shaped three-way pipe is sleeved at the top end of the second arm, and the inner side passage of the horizontal passage of the T-shaped three-way pipe is sleeved on the end of the second arm connecting rod; the outer side of the horizontal through hole of the T-shaped three-way pipe is communicated with the inserting head.

The bottom end of the second arm is provided with an X axial through hole, and the X axial through hole is sleeved on the support bottom rod to form rotary connection.

The support device is characterized by further comprising a bottom three-way pipe, wherein the vertical through of the bottom three-way pipe is sleeved at the bottom end of the first arm, and the horizontal through of the bottom three-way pipe is sleeved at the outer end of the support bottom rod.

The upper bed plate is arranged in a rotary movable manner relative to the upper half bed frame and the lower bed plate is arranged in a rotary movable manner relative to the lower half bed frame;

the upper bed plate adopts a straight plate; the lower bed plate adopts a first plate and a second plate which are hinged, and the first plate is close to the upper bed plate; two sides of the tail part of the bottom surface of the second plate are respectively hinged with one end of 2 supporting rods, and the other ends of the 2 supporting rods are respectively hinged with the inner sides of the left side frame and the right side frame of the lower half bed frame;

a lower cross beam is arranged between the left side frame and the right side frame of the lower half bed frame positioned below the second plate; the upper and lower thickness of the lower half bed frame is greater than that of the lower cross beam;

the bottom of the cylinder part of the lower cylinder is hinged on the lower cross beam; the end of the telescopic rod of the lower air cylinder is hinged to the bottom surface of the first plate close to the second plate.

An upper cross beam is arranged between the left side frame and the right side frame of the upper half bed frame close to the lower bed plate, the bottom of the cylinder part of the upper cylinder is hinged on the upper cross beam, and the end of the telescopic rod of the upper cylinder is hinged at the position close to the free end of the upper bed plate.

The upper half bed frame and the lower half bed frame are hinged by adopting movable joints, and the movable joints comprise male joints and female joints;

the female joint comprises a first strip-shaped embedded block, one end of the first strip-shaped embedded block is integrally provided with a vertical hook structure, the vertical surface of the female surface of the vertical hook structure is connected to the end surface of one end of the first strip-shaped embedded block, and the transverse surface of the female surface of the vertical hook structure is connected to the bottom surface of one end of the first strip-shaped embedded block; the vertical surface of the male surface of the vertical hook structure is longitudinally provided with an embedded groove; the bottoms of the two side walls of the caulking groove are respectively provided with a round shaft lug;

the male joint comprises a second bar-shaped embedded block, one end of the second bar-shaped embedded block is integrally provided with another vertical hook structure, the vertical surface of the female surface of the other vertical hook structure is connected to the end surface of one end of the second bar-shaped embedded block, and the transverse surface of the female surface of the other vertical hook structure is connected to the bottom surface of one end of the second bar-shaped embedded block; the male surface and the bottom end of the other vertical hook structure are thinner than the rest parts of the two side walls of the other vertical hook structure, so that the male surface and the bottom end of the other vertical hook structure form a tongue embedding part matched with the embedding groove; a pin hole is arranged near the bottom of the tongue embedding part;

the tongue embedding part of the male joint is embedded in the embedding groove of the female joint; the round shaft lug is in pin joint with the pin hole of the tongue embedding part;

at least the connecting end surfaces of the upper half bed frame and the lower half bed frame are respectively provided with a hollow structure;

the first bar-shaped embedded block of the female joint and the second bar-shaped embedded block of the male joint are respectively and correspondingly embedded in the hollow structure of the connecting end surface of the upper half bed frame and the hollow structure of the connecting end surface of the lower half bed frame.

The side of the foldable bed frame is bolted with a tray by a handle bolt.

Compared with the prior art, the invention has simple structure and convenient use; the structure is succinct and can compromise beautifully after accomodating.

Drawings

Fig. 1 is a three-dimensional structure diagram of a bed board in the embodiment of the invention when a patient sits up for use.

Fig. 2 is a perspective view of the portable folding bed from another perspective in the use state shown in fig. 1.

Fig. 3 is a perspective view of the portable folding bed from another perspective in the use state shown in fig. 1.

Fig. 4 is a three-dimensional structure diagram of the folding supporting leg in the embodiment of the invention.

Fig. 5 is a perspective view of a U-shaped groove block according to an embodiment of the present invention.

Fig. 6 is another perspective view of the U-groove concave block according to the embodiment of the present invention.

Fig. 7 is a front view of a U-groove pocket block in an embodiment of the invention.

Fig. 8 is a rear view of a U-groove pocket block in an embodiment of the invention.

Fig. 9 is a right side view of fig. 7.

FIG. 10 is a perspective view of a U-shaped slot bump in accordance with an embodiment of the present invention.

FIG. 11 is a front view of a U-shaped slot tab in an embodiment of the invention.

FIG. 12 is a rear view of a U-shaped channel tab in an embodiment of the invention.

Fig. 13 is a right side view of fig. 11.

Fig. 14 is a perspective view of a female joint in an embodiment of the present invention.

Fig. 15 is a front view of a female joint in an embodiment of the invention.

Fig. 16 is a right side view of a female joint in an embodiment of the present invention.

Figure 17 is a top view of a female joint in an embodiment of the present invention.

Fig. 18 is a bottom view of a female joint in an embodiment of the present invention.

Fig. 19 is a perspective view of a male joint in an embodiment of the invention.

Figure 20 is a front view of a male joint in an embodiment of the invention.

Fig. 21 is a right side view of a male joint in an embodiment of the invention.

Figure 22 is a top view of a male joint in an embodiment of the invention.

Figure 23 is a bottom view of a male joint in an embodiment of the invention.

FIG. 24 is a front view of the male and female joints of the present invention as they are closed.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and examples.

Example 1

Referring to fig. 1 to 4, a portable folding bed comprises a foldable bed frame, a foldable bed board and folding supporting legs, wherein the foldable bed frame comprises an upper half bed frame and a lower half bed frame which can be opened and closed, the foldable bed board comprises an upper bed board and a lower bed board which can be opened and closed, and the upper bed board and the upper half bed frame are fixedly connected in this example; the lower bed board is fixedly connected with the lower half bed frame, and the lower parts of the upper half bed frame 41 and the lower half bed frame 42 are respectively and rotatably connected with a folding supporting leg 1;

in this example, the folding supporting leg 1 comprises 2 first arms 1-1, 2 second arms 1-2 and a supporting bottom rod 1-3; the bottom ends of the 2 first arms 1-1 are rotatably connected with the supporting bottom rods 1-3; the bottom ends of the 2 second arms 1-2 are respectively positioned between the 2 first arms 1-1 and are rotationally connected with the supporting bottom rod 1-3, and the first arms 1-1 and the second arms 1-2 respectively rotate around the central axis of the supporting bottom rod 1-3; the top ends of the 2 second arms 1-2 are at least provided with inserting heads 1-22 which are perpendicular to the top ends, and the inserting heads 1-22 face outwards;

the top ends of the first arms 1-1 of the 2 folding supporting legs 1 are respectively and rotatably connected with the left and right side frames of the corresponding upper half bed frame 41 and the left and right side frames of the lower half bed frame 42, in this example, the top ends of the first arms 1-1 are provided with right-angle joints 1-12 which are rotatably connected with the inner sides of the foldable bed frames through the right-angle joints 1-12; the inner sides of the left and right side frames of the upper half bed frame 41 and the inner sides of the left and right side frames of the lower half bed frame 42 are respectively provided with an embedded plug accommodating groove with an opening at the lower end, and the embedded plug accommodating groove can be integrally arranged on the upper and lower half bed frames in the embodiment;

when the foldable bed frame is unfolded to be horizontal, the embedded plugs 1-22 of the second arms 1-2 of the 2 foldable supporting feet 1 are respectively nested and connected with the corresponding embedded plug accommodating grooves, so that the foldable supporting feet 1 are in an inverted triangle shape; when the foldable bed frame is folded in half, the 2 second arms 1-2 are respectively separated from the corresponding plug-in holding grooves and then rotate along the respective supporting bottom rods 1-3 to be attached and folded towards the corresponding first arms 1-1, at this time, the back surface of the upper half bed frame 41 is attached to the back surface of the lower half bed frame 42 in opposite directions, and a space is reserved between the back surface of the upper bed plate 51 and the back surface of the lower bed plate 52, so that a holding cavity for holding the 2 folded supporting legs 1 is formed between the upper bed plate and the lower bed plate. Thus, the foldable bed forms a square shape similar to the length of a half bed when folded and furled, and the appearance is very concise and beautiful.

Furthermore, in the embodiment, the foldable bed plate is provided with weight-reducing sinking grooves and/or through hole weight-reducing holes, so that the weight is further reduced.

Example 2

The embodiment is a further improvement on the basis of embodiment 1, and the main idea is as follows: after the upper and lower half bed frames are folded and spliced, the splicing surfaces of the upper and lower half bed frames are designed with the clamping and embedding structures for positioning the upper and lower half bed frames, and then in order to further simplify the structure, the clamping and embedding structures and the embedding plug accommodating groove are integrated into an integral structure, and the specific structure is as follows:

referring to fig. 5 to 13, the device mainly comprises 2U-shaped groove blocks 2 and 2U-shaped groove lugs 3.

Referring to fig. 5-9, the U-shaped groove projection 3 adopts a first right-angle block with a long side and a short side, the top surface of the first right-angle block is flush, the top surface of the first right-angle block is provided with a first U-shaped groove 3-1, the lower half part of the short side of the U-shaped groove projection 3 is provided with an 'n' -shaped groove 3-3 as a plug accommodating groove, and the long side of the U-shaped groove projection 3 is provided with a tongue structure 3-2; the first U-shaped grooves 3-1 of the 2U-shaped groove lugs 3 are respectively fixed on the lower parts of the left and right side frames of the upper half bed frame 41 in an embedded manner; the short sides of the U-shaped channel projections 3 are located on the inside and the long sides of the U-shaped channel projections 3 are located on the outside in this example.

Referring to fig. 10 to 13, the U-shaped groove concave block 2 is a second right-angle block with a long side and a short side, the top surface of the second right-angle block is flush, a second U-shaped groove 2-1 is arranged on the top surface of the second right-angle block, and the lower half part of the short side of the U-shaped groove concave block 2 is provided with another n-shaped groove 2-3 as a plug accommodating groove; the long side surface of the U-shaped groove concave block 2 is provided with an inverted trapezoidal mortise 2-2 with an opening at the lower end and a narrow upper part and a wide lower part; the second U-shaped grooves 2-1 of the 2U-shaped groove concave blocks 2 are respectively nested at the lower parts of the left and right side frames of the lower half bed frame 42; and the short side surface of the U-shaped groove concave block 2 is positioned at the inner side, and the long side surface of the U-shaped groove concave block 2 is positioned at the outer side.

Thus, when the foldable bed frame is folded, the tenon structure 3-2 of the U-shaped groove convex block 3 is embedded in the tenon groove 2-2 of the U-shaped groove concave block 2.

Example 3

This example is a further improvement of the partial structure of the two embodiments described above.

Furthermore, the present embodiment may further include a second arm link 1-4, and two ends of the second arm link 1-4 are respectively connected to the 2 second arms 1-2, so that the 2 second arms 1-2 are conveniently rotated at the same time.

Of course, the second arm link 1-4 may be disposed at the top end of the second arm 1-2, or may be disposed at a position between the upper and lower ends of the second arm 1-2.

When two ends of a second arm connecting rod 1-4 are respectively connected to the top ends of 2 second arms 1-2, the inserting head 1-22 is arranged on a T-shaped three-way pipe, the vertical through of the T-shaped three-way pipe is sleeved on the top end of the second arm 1-2, and the inner side of the horizontal through of the T-shaped three-way pipe is sleeved on the end head of the second arm connecting rod 1-4; the outer side of the horizontal through of the T-shaped three-way pipe is communicated with the embedded plug 1-22. Therefore, the embedded plug 1-22 and the connecting structure for connecting the second arm 1-2 and the second arm connecting rod 1-4 are integrated into an integrated structure through the T-shaped tee pipe.

Further, in this example, the bottom end of the second arm 1-2 is provided with an X axial through hole 1-21, and the X axial through hole 1-21 is sleeved on the support bottom rod 1-3 to form a rotary connection, in this example, the X axial through hole 1-21 may be integrally arranged at the bottom end of the second arm 1-2, or a sleeve provided with the X axial through hole 1-21 may be additionally sleeved at the bottom end of the second arm 1-2.

Furthermore, the device also comprises a bottom three-way pipe 1-11, wherein the vertical pipe of the bottom three-way pipe 1-11 is sleeved at the bottom end of the first arm 1-1, and the horizontal pipe of the bottom three-way pipe 1-11 is sleeved at the outer end of the support bottom rod 1-3.

Example 4

The present example is a further improvement on the foldable bed board in the above 3 embodiments, and the specific improvement is as follows:

the upper bed board 51 and the lower bed board 52 in this example are respectively set to be movable in rotation relative to the upper half bed frame 41 and the lower half bed frame 42, that is, the lower end of the upper bed board 51 is hinged to the upper half bed frame 41, and the upper end of the lower bed board 52 is hinged to the lower half bed frame 42, so that the upper and lower bed boards can perform rotary lifting movement corresponding to the upper and lower bed frames;

the upper bed plate 51 adopts a straight plate; the lower bed board 52 adopts a first board 521 and a second board 522 which are hinged, the first board 521 is close to the upper bed board 51, so that the lower bed board 52 can be designed into a bendable type which accords with the bending movement of the leg joint. In order to ensure that the lower bed board is stable enough when being bent, two sides of the tail part of the bottom surface of the second board 522 are respectively hinged with one end of 2 supporting rods 423, and the other ends of the 2 supporting rods 423 are respectively hinged on the inner sides of the left side frame and the right side frame of the lower half bed frame;

a lower cross beam 421 is arranged between the left side frame and the right side frame of the lower half bed frame 42 positioned below the second plate 522; the upper and lower thickness of the lower half bed frame 42 is greater than the upper and lower thickness of the lower cross beam 421 so as not to obstruct the accommodating cavity;

the bottom of the cylinder part of the lower cylinder 422 is hinged on the lower beam 421; the end of the telescopic rod of the lower cylinder 422 is hinged to the bottom surface of the first plate 521 close to the second plate 522, the end of the first plate 521 close to the second plate 522 is lifted through the linear telescopic motion of the lower cylinder 422, so that the end of the second plate 522 close to the first plate 521 is lifted, an inverted V-shaped structure is formed between the first plate and the second plate, and the legs can be bent.

An upper cross beam 53 is arranged between the left side frame and the right side frame of the upper half bed frame 41 close to the lower bed board 52, the bottom of the cylinder part of the upper cylinder 54 is hinged on the upper cross beam 53, the end of the telescopic rod of the upper cylinder 54 is hinged at the near free end of the upper bed board 51, and therefore the upper bed board 51 can be conveniently rotated and lifted through the upper cylinder 54, and the upper half body of a person on the upper bed board can lie flat or sit up.

Further, referring to fig. 1 to 3, in this embodiment, the upper and lower half frames near the hinge joint of the upper and lower half frames are respectively provided with a fixing plate 8 fixedly connected to the upper and lower half frames, and this part of the design is to consider that when the upper and lower half frames move, the buttocks of a person lying thereon are located on the fixing plate 8, so that the person is not affected by the movement of the upper and lower half frames.

Further, referring to fig. 1 to 3 and 14 to 24, in this embodiment, the upper half bed frame 41 and the lower half bed frame 42 are hinged by a movable joint 7, and the movable joint 7 includes a male joint 71 and a female joint 72;

the female joint 72 comprises a first strip-shaped insert 721, one end of the first strip-shaped insert 721 is integrally provided with a vertical hook structure, the vertical surface of the female surface of the vertical hook structure is connected to the end surface of one end of the first strip-shaped insert 721, and the transverse surface of the female surface of the vertical hook structure is connected to the bottom surface of one end of the first strip-shaped insert 721; the vertical surface of the male surface of the vertical hook structure is longitudinally provided with an embedded groove 722; the bottoms of the two side walls of the caulking groove 722 are respectively provided with a round shaft lug 723; in this example, two side surfaces of the hook structure protrude from two side surfaces of the first bar-shaped insert 721;

the male joint 71 comprises a second bar-shaped insert block 711, one end of the second bar-shaped insert block 711 is integrally provided with another vertical hook structure, the vertical surface of the female surface of the other vertical hook structure is connected to the end surface of one end of the second bar-shaped insert block 711, and the transverse surface of the female surface of the other vertical hook structure is connected to the bottom surface of one end of the second bar-shaped insert block 711; the male surface and the bottom end of the other vertical hook structure are thinner than the rest parts of the two side walls of the other vertical hook structure, so that the male surface and the bottom end of the other vertical hook structure form a tongue embedding part 712 matched with the embedding groove 722; a pin hole 713 is formed near the bottom of the tongue-fitting portion 712;

the tongue portion 712 of the male joint 71 is embedded in the embedding groove 722 of the female joint 72; and the round shaft lug 723 is in pin joint with the pin hole 713 of the tongue-embedding part 712;

at least the connecting end surfaces of the upper half bed frame 41 and the lower half bed frame 42 are respectively provided with a hollow structure; considering the weight reduction design, the bed frame can be designed into a hollow structure under the condition that the material strength of the upper half bed frame and the lower half bed frame is allowed;

the first bar-shaped insert 721 of the female joint 72 and the second bar-shaped insert 711 of the male joint 71 are respectively and correspondingly embedded in the hollow structure of the connecting end surface of the upper half bed frame 41 and the hollow structure of the connecting end surface of the lower half bed frame 42.

In this embodiment, the depth of the groove 722 of the female joint 72 is shallower at the open/close end, and the depth of the groove at the pin joint is deeper, and the outer contour of the tongue portion 712 of the male joint 71 is the same as the shape of the bottom surface of the groove 722, so that the male joint 71 and the female joint 72 are at an included angle of 20 degrees, and the finger is not easy to be pinched.

Example 5

Referring to fig. 1 to fig. 3, this embodiment is a further improvement on the 4 embodiments described above, and specifically, a tray 6 is bolted to the side of the foldable bed frame by using a handle bolt, so as to facilitate the placement of articles, for example, when the foldable bed is used as a military bed for medical service, drugs can be placed in the foldable bed, and when the foldable bed is folded, the tray 6 can be removed and placed in the accommodating cavity.

Claims

1. A portable folding bed comprises a foldable bed frame, a foldable bed board and folding supporting legs, wherein the foldable bed frame comprises an upper half bed frame and a lower half bed frame which can be opened and closed mutually; at least one end of the lower bed board is connected with the folding end of the lower bed frame, and the lower bed board is characterized in that:

the lower parts of the upper half bed frame and the lower half bed frame (41, 42) are respectively connected with a folding supporting leg (1) in a rotating way;

the folding supporting leg (1) comprises 2 first arms (1-1), 2 second arms (1-2) and a supporting bottom rod (1-3); the bottom ends of the 2 first arms (1-1) are rotatably connected with the supporting bottom rod (1-3); the bottom ends of the 2 second arms (1-2) are respectively positioned between the 2 first arms (1-1) and are rotatably connected with the supporting bottom rods (1-3), and the first arms (1-1) and the second arms (1-2) respectively rotate around the central axis of the supporting bottom rods (1-3); the top ends of the 2 second arms (1-2) are at least provided with embedded plugs (1-22) which are perpendicular to the top ends, and the embedded plugs (1-22) face outwards;

the top ends of the first arms (1-1) of the 2 folding supporting legs (1) are respectively and rotatably connected with the left side frame and the right side frame of the corresponding upper half bed frame (41) and the left side frame and the right side frame of the corresponding lower half bed frame (42); the inner sides of the left and right side frames of the upper half bed frame (41) and the inner sides of the left and right side frames of the lower half bed frame (42) are respectively provided with an embedded plug accommodating groove with an opening at the lower end;

when the foldable bed frame is unfolded to be horizontal, the embedded plugs (1-22) of the second arms (1-2) of the 2 folding supporting feet (1) are respectively connected with the corresponding embedded plug accommodating grooves in a nested manner, so that the folding supporting feet (1) are in an inverted triangle shape; when the foldable bed frame is folded in half, the 2 second arms (1-2) are respectively separated from the corresponding plug accommodating grooves and then rotate along the respective supporting bottom rods (1-3) to be attached and folded towards the corresponding first arms (1-1), at the moment, the back surface of the upper half bed frame (41) is attached to the back surface of the lower half bed frame (42) in opposite directions, and a space is reserved between the back surface of the upper bed plate (51) and the back surface of the lower bed plate (52), so that an accommodating cavity for accommodating the 2 folded supporting legs (1) is formed between the upper bed plate and the lower bed plate;

the upper half bed frame (41) and the lower half bed frame (42) are hinged by a movable joint (7), and the movable joint (7) comprises a male joint (71) and a female joint (72);

the female joint (72) comprises a first strip-shaped insert block (721), one end of the first strip-shaped insert block (721) is integrally provided with a vertical hook structure, the vertical surface of the female surface of the vertical hook structure is connected to the end surface of one end of the first strip-shaped insert block (721), and the transverse surface of the female surface of the vertical hook structure is connected to the bottom surface of one end of the first strip-shaped insert block (721); the vertical surface of the male surface of the vertical hook structure is longitudinally provided with an embedded groove (722); the bottoms of the two side walls of the caulking groove (722) are respectively provided with a round shaft lug (723);

the male joint (71) comprises a second strip-shaped insert block (711), one end of the second strip-shaped insert block (711) is integrally provided with another vertical hook structure, the vertical surface of the female surface of the other vertical hook structure is connected to the end surface of one end of the second strip-shaped insert block (711), and the transverse surface of the female surface of the other vertical hook structure is connected to the bottom surface of one end of the second strip-shaped insert block (711); the male surface and the bottom end of the other vertical hook structure are thinner than the rest parts of the two side walls of the other vertical hook structure, so that the male surface and the bottom end of the other vertical hook structure form a tongue embedding part (712) matched with the embedding groove (722); a pin hole (713) is arranged at the bottom of the tongue embedding part (712);

the tongue embedding part (712) of the male joint (71) is embedded in the embedding groove (722) of the female joint (72); the round shaft lug (723) is in pin joint with the pin hole (713) of the tongue embedding part (712);

at least the connecting end surfaces of the upper half bed frame (41) and the lower half bed frame (42) are respectively of a hollow structure;

the first strip-shaped insert (721) of the female joint (72) and the second strip-shaped insert (711) of the male joint (71) are correspondingly embedded in the hollow structure of the connecting end face of the upper half bed frame (41) and the hollow structure of the connecting end face of the lower half bed frame (42) respectively.

2. A portable folding bed as claimed in claim 1, wherein:

the device also comprises 2U-shaped groove concave blocks (2) and 2U-shaped groove convex blocks (3);

the U-shaped groove convex block (3) adopts a first right-angle block with a long side face and a short side face, the top face of the first right-angle block is flush, a first U-shaped groove (3-1) is arranged on the top face of the first right-angle block, an n-shaped groove (3-3) used as the plug inserting accommodating groove is arranged on the lower half part of the short side face of the U-shaped groove convex block (3), and the long side face of the U-shaped groove convex block (3) is arranged into a tongue structure (3-2);

the U-shaped groove concave block (2) adopts a second right-angle block with a long side face and a short side face, the top face of the second right-angle block is flush, a second U-shaped groove (2-1) is arranged on the top face of the second right-angle block, and the lower half part of the short side face of the U-shaped groove concave block (2) is provided with another n-shaped groove (2-3) which is used as the embedded plug accommodating groove; a tongue-and-groove (2-2) with an opening at the lower end is arranged on the long side surface of the U-shaped groove concave block (2);

the first U-shaped grooves (3-1) of the 2U-shaped groove convex blocks (3) and the second U-shaped grooves (2-1) of the 2U-shaped groove concave blocks (2) are respectively nested at the lower parts of the left and right side frames of the upper and lower half bed frames (41, 42);

when the foldable bed frame is folded, the tenon structure (3-2) of the U-shaped groove convex block (3) is embedded in the tenon groove (2-2) of the U-shaped groove concave block (2).

3. A portable folding bed as claimed in claim 1, wherein: the device also comprises second arm connecting rods (1-4), and two ends of each second arm connecting rod (1-4) are respectively connected with 2 second arms (1-2).

4. A portable folding bed as claimed in claim 3, wherein:

the two ends of the second arm connecting rods (1-4) are respectively connected with the middle parts of the 2 second arms (1-2);

or the embedded plug (1-22) is arranged on a T-shaped three-way pipe, the vertical through of the T-shaped three-way pipe is sleeved at the top end of the second arm (1-2), and the inner side through of the horizontal through of the T-shaped three-way pipe is sleeved at the end head of the second arm connecting rod (1-4); the outer side of the horizontal through hole of the T-shaped three-way pipe is communicated with the inserting head (1-22).

5. A portable folding bed as claimed in claim 1, wherein: the bottom end of the second arm (1-2) is provided with an X axial through hole (1-21), and the X axial through hole (1-21) is sleeved on the support bottom rod (1-3) to form rotary connection.

6. A portable folding bed as claimed in claim 1, wherein: the support device is characterized by further comprising a bottom three-way pipe (1-11), wherein the vertical through of the bottom three-way pipe (1-11) is sleeved at the bottom end of the first arm (1-1), and the horizontal through of the bottom three-way pipe (1-11) is sleeved at the outer end of the support bottom rod (1-3).

7. A portable folding bed as claimed in claim 1, wherein:

the upper bed plate (51) is rotationally movable relative to the upper half bed frame (41) and the lower bed plate (52) is rotationally movable relative to the lower half bed frame (42);

the upper bed plate (51) adopts a straight plate; the lower bed board (52) adopts a first board (521) and a second board (522) which are hinged, and the first board (521) is close to the upper bed board (51); two sides of the tail part of the bottom surface of the second plate (522) are respectively hinged with one end of 2 supporting rods (423), and the other ends of the 2 supporting rods (423) are respectively hinged with the inner sides of the left side frame and the right side frame of the lower half bed frame (42);

a lower cross beam (421) is arranged between the left side frame and the right side frame of the lower half bed frame (42) which is positioned below the second plate (522); the upper and lower thickness of the lower half bed frame (42) is greater than that of the lower cross beam (421);

the bottom of the cylinder part of a lower cylinder (422) is hinged on the lower cross beam (421); the end of the telescopic rod of the lower cylinder (422) is hinged on the bottom surface of the first plate (521) close to the second plate (522).

8. A portable folding bed as claimed in claim 7, wherein: an upper cross beam (53) is arranged between the left side frame and the right side frame of the upper half bed frame (41) close to the lower bed plate (52), the bottom of the cylinder part of an upper cylinder (54) is hinged on the upper cross beam (53), and the end of a telescopic rod of the upper cylinder (54) is hinged at the near free end of the upper bed plate (51).

9. A portable folding bed as claimed in claim 1, wherein: the side edge of the foldable bed frame is bolted with a tray (6) by adopting a handle bolt.