Small-size foldable bed frame

Abstract

The invention discloses a small-size foldable bed frame, the outer contour of which can be put into a cubic package in a detached state, and the small-size foldable bed frame comprises a bed head unit (110), a bed middle plate (120) and a bed tail unit (130), in the detached state, the frame part of the bed head unit (110) and the frame part of the bed tail unit (130) are oppositely arranged, and the bed middle plate (120) and the cover face of the bed head unit (110) or the bed tail unit (130) are oppositely arranged, so that the frame part of the bed head unit (110) and the frame part of the bed tail unit (130) are oppositely arranged, and an annular storage space is formed between the cover face of the bed head unit (110) and the cover face of the bed tail unit (130). The foldable bed frame has the advantages that the foldable bed frame is small in size and suitable for small packages, and therefore the storage cost, the transportation cost and the like can be saved.

Description

Technical Field

[0001] The invention relates to a foldable bed frame, in particular to a small-volume bed frame. Background Art

[0002] The folding beds in the prior art occupy a large transportation volume when folded up for transportation, resulting in high freight costs. On the one hand, the bed frame of the existing folding beds is large in size after being folded up. In addition, the components of some small-volume folding beds are relatively scattered, which is not user-friendly when reassembling and is not convenient for users to use on site. In the existing bed frame structure, the pipe fittings of the bracket part are far away from the hinge point, resulting in insufficient strength of the bed frame. Summary of the invention

[0003] The object of the present invention is to provide an improved folding bed frame, thereby solving at least one of the above technical problems.

[0004] To this end, some embodiments of the present application propose a small-volume foldable bed frame, whose outer contour in the disassembled state can be placed in a cubic configuration package, including a headboard unit, a mid-bed and a footboard unit; in the disassembled state, the frame part of the headboard unit and the frame part of the footboard are arranged opposite to each other, and the mid-bed and the cover surface of the headboard unit or the footboard are arranged opposite to each other, so that the frame part of the headboard unit and the frame part of the footboard are arranged opposite to each other, and an annular storage space is formed between the covers of the headboard unit and the footboard.

[0005] In some embodiments, in the assembled state, the first mid-bed support of the head unit is pivotally connected to the frame portion of the head unit, and the head unit bed cover is fixedly connected to the surface of the frame portion of the head unit. Similarly, the second mid-bed support of the foot sheet is fully opened, the second mid-bed support is pivotally connected to the frame portion of the foot unit, and the head unit bed cover is fixedly connected to the surface of the frame portion of the head unit. During installation, the first mid-bed support and the second mid-bed support are arranged relative to each other, thereby fixing the bottom of the bed together.

[0006] In some embodiments, the first bed-midboard support portion of the headboard unit includes a groove-shaped body, and a pivot shaft pivotally connected to the headboard support frame is provided at the first end of the groove-shaped body adjacent to the headboard support frame. With the help of the pivot shaft, the first bed-midboard support portion as a whole pivots around the headboard support frame, and a pin shaft hole and a pin shaft are also provided at this end. Through the pin shaft, the first bed-midboard support portion is positioned on the side of the headboard support frame in the folded state and the unfolded state.

[0007] In some embodiments, the bedside unit further comprises a head support frame, wherein the head support frame, such as a rolling support frame, is connected to the frame portion of the head unit; and / or further comprises a foot support frame, wherein the foot support frame, such as a rolling support frame, is connected to the frame portion of the foot unit.

[0008] In some embodiments, the rolling support frame includes two support arms and a crossbeam fixedly connected between the two support arms, wherein the two support arms are respectively hinged to the two side frames of the frame part, and the crossbeam spans between the two support arms and is fixedly connected; wherein any one of the support arms includes a first section hinged to the side frame of the frame part and a second section arranged at a first angle to the first section in the length direction, wherein the first section includes a hinge part and a bending part, the hinge part is adjacent to and hinged to the side frame, the bending part forms a structure inwardly retracted in the width direction and is connected to the second section; the two ends of the crossbeam are respectively configured to include a shape that complies with at least a part of the bending part so as to be connected between at least a part of the bending part of the first section of the two support arms; the first roller and / or the second roller are respectively coupled to the two support arms.

[0009] In some embodiments, both ends of the beam are respectively configured to further include a shape that complies with a portion of the hinge portion, so as to be connected between at least a portion of the hinge portions of the first sections of the two arms.

[0010] In some embodiments, an arc-shaped corner joint is further provided between the support arm and the cross beam.

[0011] In some embodiments, the first roller and / or the second roller is mounted on the inner side of the support arm.

[0012] In some embodiments, the first roller and / or the second roller are installed on the outer side of the support arm; the width behind the first roller and / or the second roller does not exceed the plane where the first section is located, that is, the widest part of the rolling support frame is the distance between the outer sides of the first sections of the two arms.

[0013] In some embodiments, the first roller is installed at the connection between the first section and the second section.

[0014] The beneficial effects of the present application include: a small-volume foldable bed frame solution is proposed, which is suitable for small packaging, thereby saving storage and transportation costs. The bed frame structure of the proposed small-volume foldable bed frame solution is still easy to install, and only the first bed middle board support part and the second bed middle board support part need to be flipped, and then the bed foot and the bed middle board are combined and connected with screws. The roller support arm structure of the bed frame is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of a small-volume folding bed in a packaged state according to an embodiment of the present application.

[0016] Figure 2 It is a three-dimensional schematic diagram of an unpacked small-volume folding bed according to an embodiment of the present application.

[0017] Figure 3 Schematic diagram of the head unit, mid-bed and foot unit after separation

[0018] Figure 4 It is a schematic diagram of aligning a first bed mid-board support portion and a second bed mid-board support portion of a small-volume folding bed according to an embodiment of the present application.

[0019] Figure 5 This is a schematic diagram of a small-volume folding bed after a bed midboard is installed according to an embodiment of the present application.

[0020] Figure 6 It is a schematic structural diagram of the first bed mid-board support portion of a small-volume folding bed according to an embodiment of the present application.

[0021] Figure 7 It is a partial three-dimensional schematic diagram of a rolling support frame and a portion of a frame portion of a small-volume folding bed according to an embodiment of the present application.

[0022] Figure 8 It is a partial three-dimensional schematic diagram of a rolling support frame of a small-volume folding bed according to an embodiment of the present application.

[0023] Fig. 9 It is a partial three-dimensional schematic diagram of a rolling support frame and another part of the frame part of a small-volume folding bed according to an embodiment of the present application.

[0024] Fig.10 It is a partial side schematic diagram of a rolling support frame of a small-volume folding bed according to an embodiment of the present application.

[0025] Fig.11 It is a schematic top view of a rolling support frame of a small-volume folding bed according to an embodiment of the present application.

[0026] Fig.12 It is a partial bottom view schematic diagram of a bed including the sheet metal structure of the bed legs of the small-volume folding bed of the present application.

[0027] Fig.13 It is a three-dimensional schematic diagram of a first angle of the sheet metal structure of the bed legs of a small-volume folding bed according to an embodiment of the present application.

[0028] Fig.14 It is a perspective schematic diagram of a second angle of the sheet metal structure of the bed legs of a small-volume folding bed according to an embodiment of the present application.

[0029] Fig.15 It is a schematic diagram of the formation process of the sheet metal structure of the bed legs of a small-volume folding bed according to an embodiment of the present application.

[0030] Fig.16 This is a schematic diagram of the bottom surface of a small-volume folding bed after installation according to an embodiment of the present application.

[0031] Fig.17 This is a schematic diagram of the structure of a small-volume folding bed after installation according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] The present application is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0033] Figure 1 FIG. 1 is a three-dimensional schematic diagram of a small-volume folding bed in a packaged state according to an embodiment of the present application. Figure 1 , which is a schematic diagram of a small-volume folding bed 100 and its outer packaging 200 of the present application. The outer packaging is roughly a cube, and the small-volume folding bed conforms to the cube configuration of the outer packaging when in a disassembled state.

[0034] Figure 2 It is a three-dimensional schematic diagram of an unpacked small-volume folding bed according to an embodiment of the present application. Figure 3 FIG. 1 is a schematic diagram of the head unit 110, the middle bed board 120, and the foot unit 130 after being separated. Figure 2 , Figure 3 As shown, the small-volume folding bed 100 includes a bed head unit 110, a bed mid-board 120, and a bed foot unit 130. In the disassembled state, the frame portion of the bed head unit 110 and the frame portion of the bed foot unit 130 are arranged opposite to each other, and the bed mid-board 120 is arranged opposite to the bed cover surface of the bed head unit 110. It should be understood that the bed mid-board 120 can also be arranged opposite to the bed cover surface of the bed foot unit 130.

[0035] Such an arrangement allows the bed cover of the head unit 110 to contact the bed cover of the bed midboard, thereby preventing the bed cover from being damaged during transportation. The frame portion of the head unit 110 is arranged opposite to the frame portion of the foot unit 130, so that an annular storage space can be formed between the covers of the head unit 110 and the foot unit 130, and the storage space can be used to place small accessories such as bed legs, decorative frames, electrical components, and packaging materials. The cover of the foot unit 130 can be in contact with the paper foil downwards, thereby being protected.

[0036] Figure 4 FIG. 1 is a perspective view of a small-volume folding bed in an assembled state according to an embodiment of the present application. Figure 4As shown, the first mid-bed support portion 110D of the head unit 110 is pivotally connected to the frame portion 110A of the head unit, and the head unit bed cover 110B is fixedly connected to the surface of the frame portion 110A of the head unit. Similarly, the second mid-bed support portion 130D of the foot unit 130 is fully opened, the second mid-bed support portion 130D is pivotally connected to the frame portion 130A of the foot unit, and the head unit bed cover 130B is fixedly connected to the surface of the frame portion 130A of the head unit. During installation, the first mid-bed support portion 110D and the second mid-bed support portion 130D are arranged relative to each other, thereby fixing the bottom of the bed board 120 together, such as the bed board frame 120A at the bottom of the bed board. The bed board 120 may include a bed board frame 120A and a bed board bed cover 120B engaged on the bed board frame 120A.

[0037] Also included is a bedside support frame 110C, such as a rolling support frame connected to the frame portion 110A of the bedside unit.

[0038] Also included is a footrest support 130C, such as a rolling support, connected to the frame portion 130A of the footrest unit.

[0039] The structures of the first mid-bed support portion 110D of the head unit 110 and the second mid-bed support portion 130D of the foot unit 130 are as follows: Figure 5 , Figure 6 As shown. For example, the first bed mid-board support portion 110D of the bedside unit 110 may include a slot-shaped body 1121 (such as a U-shaped slot or a square slot). A pivot shaft 1122 is provided at the first end of the slot-shaped body 1121 adjacent to the bedside support frame 110C for pivotally connecting the bedside support frame 110C. With the aid of the pivot shaft 1122, the first bed mid-board support portion 110D can pivot around the bedside support frame 110C as a whole. In addition, a pin hole and a pin 1123 can also be provided at this end, and through the pin 1123, the first bed mid-board support portion 110D can be positioned on the side of the bedside support frame 110C in a folded state and an unfolded state. A structural reinforcement key 1124 is provided on the slot wall of the slot-shaped body 1121.

[0040] In addition to a single groove-shaped body with a consistent shape, the first bed mid-plate support portion 110D may also adopt other similar structures, for example, a groove-shaped body with an opening or a composite groove-shaped body, such as a groove-shaped body composed of a larger square groove and a smaller square groove.

[0041] The frame portion of the head unit and the frame portion of the foot unit can be supported by a rolling support frame to be tilted, for example, Figure 5 The frame portion 110A of the bedside unit 110 is used to support the bed cover 110B, and the frame portion 110A is supported by a rolling support frame 110C to form an inclined angle.

[0042] like Figure 7 , Figure 8 As shown, in order to adapt to the structure of the first bed mid-board support part 110D that can be positioned in the folded state and the unfolded state, the structure of the rolling support frame 110C is also adjusted accordingly. For example, the main body of the rolling support frame 110C includes two arms and a crossbeam 1133 fixedly connected between the two arms, wherein the two arms are respectively installed on the two side frames of the frame part 110A, and the crossbeam 1133 spans between the two arms. Among them, any one of the arms may include the following structure, a first section close to the side beam of the frame part 110A and hinged to the side frame of the frame part 110A, a second section away from the side frame of the frame part, and a connecting section inclined between the first section and the second section, wherein the first roller and / or the second roller are coupled to the second section, wherein the first roller is adjacent to the connecting section, and the second roller is away from the connecting section. The two ends of the crossbeam 1133 are respectively configured as connecting sections that at least connect the arm, for example, the first section, the second section and the connecting section of the arm are connected at the same time. According to this, both ends of the cross beam 1133 have ends that at least conform to the shape of the connecting section of the support arm. This configuration is different from the planar configuration of the two ends of the conventional cross beam for mounting on the second section of the cross beam. In this way, the positions of the first roller and the second roller can be closer to the first section of the support arm. In addition, in order to ensure the rigidity of the support arm, an arc-shaped corner joint is also provided between the support arm and the cross beam.

[0043] For example, the main body of the rolling support frame 110C includes two arms and a crossbeam 1133 fixedly connected between the two arms, wherein the two arms are respectively mounted on the two side frames of the frame portion 110A, and the crossbeam 1133 spans between the two arms. Any one of the arms may include a first section hinged to the side frame of the frame portion 110A, and a second section offset from the side frame in the width direction and forming a first angle with the first section in the length direction. The first section includes a hinged portion configured to be adjacent to the side frame and hinged to the side frame, and a bent portion offset from the side frame in the width direction, and the second section is connected to the bent portion and forms an angle of the first angle with the bent portion.

[0044] The two ends of the cross beam 1133 are respectively configured to connect at least the bent portion of the first end section; therefore, the two ends of the cross beam 1133 have ends that at least conform to the shape of the bent portion. This configuration is different from the planar configuration of the two ends of the conventional cross beam for mounting on the second section of the cross beam, so that the positions of the first roller and the second roller (especially the position of the first roller) can be closer to the first section of the arm.

[0045] In addition, in order to ensure the rigidity of the support arm, an arc-shaped corner joint is provided between the support arm and the cross beam.

[0046] For example, the main body of the rolling support frame 110C includes two arms, namely, a first arm 1132 and a second arm 1132. The first arm 1132 includes a first section 1132A hinged on the first side frame 1110A of the frame portion 110A and a second section 1132B arranged at a first angle with the first section 1132A in the length direction. The first section 1132A may include a hinge portion 11321A and a bending portion 11322A. The crossbeam 1133 is connected to the first section of the first arm 1132, especially to the hinge portion 11321A and the bending portion 11322A of the first section, for example, covering a part of the hinge portion 11321A and the entire bending portion 11322A, or covering a part of the hinge portion 11321A and a part of the bending portion 11322A. One end of the support cylinder is connected to the crossbeam 1133. A first roller 1131 and / or a second roller 1135 are mounted upwardly on the second section 1132B. The first roller 1131 and / or the second roller 1135 can be mounted on the inner side or the outer side of the first side frame 1110A. The first roller 1131 and / or the second roller 1135 are configured to be rollable on the first supporting plate of the frame portion 110A.

[0047] The second arm is symmetrically arranged with the first arm, so the modification of the second arm is also performed symmetrically. Fig. 9 As shown, the second arm 1232 includes a first section 1232A hinged on the second side frame 1120A of the frame portion 110A and a second section 1232B arranged at a first angle with the first section 1232A in the length direction, the first section 1232A may include a second hinge portion 12321A and a second bending portion 12322A, and the crossbeam 1133 is connected to the first section of the second arm 1232, especially to the second hinge portion 12321A and the second bending portion 12322A of the first section, for example, covering a part of the second hinge portion 12321A and the entire second bending portion 12322A, or covering a part of the second hinge portion 12321A and a part of the second bending portion 12322A. One end of the supporting cylinder is connected to the crossbeam 1133. A third roller 1231 and / or a fourth roller are mounted upwardly on the second section 1232B. The third roller 1231 and / or the fourth roller can be mounted on the inner side or the outer side of the second side frame 1120A. The third roller 1231 and / or the fourth roller are configured to be rollable on the second supporting plate of the frame portion 110A.

[0048] The crossbeam 1133 is connected to one end of the support motor, and the crossbeam is hinged to the side frame of the frame part 110A by the first section of the support arm. The effective thrust F of the support motor is determined by the ratio of the distance A from the first roller to the rotation point of the bed frame and the distance C from the first roller to the hinge point on the support arm and the side frame of the frame part 110A, so that the first roller close to the first section helps it close to the hinge point, thereby reducing the value of C, thereby increasing the effective thrust. Fig.10 As shown, the efficiency of the supporting motor is improved while the size is reduced.

[0049] In order to achieve a better supporting effect, the width of the parts installed on the outside of the second section, such as the first roller and / or the second roller, does not exceed the plane where the hinge of the first section is located, that is, the widest part of the rolling support frame is the distance L between the outer sides of the first sections of the two arms. Fig.11 shown.

[0050] In order to achieve a better supporting effect, the support arm is installed with the first roller and the second roller, wherein the first roller is located at the intersection of the first section and the second section. Fig.11 shown.

[0051] In order to achieve a better supporting effect, at the connection between the cross beam and the support arm, the dimension D of one side of the support arm is at least 3 mm higher than that of the cross beam. Fig.10 shown.

[0052] The legs of the bed head unit 110 and the bed foot unit 130 can be attached to their respective support frames via the bed leg sheet metal structure 10. Fig.12 As shown, the bed foot sheet metal structure 150 of the present application is attached to the bed foot support frame 130C of the bed foot unit 130 and is adapted to the foot 140 .

[0053] like Fig.13 , Fig.14As shown, the sheet metal structure 150 for the bed support leg includes a sheet metal body 1510 and an upper cover 1520, wherein the sheet metal body 1510 includes an integrated first front plate 1511, a first rear plate 1512 and a first top plate 1513, wherein the first top plate 1513 is located between the first front plate 1511 and the first rear plate 1512, and the first front plate 1511 and the first rear plate 1512 are arranged substantially perpendicular to the first top plate 1513. On the first side of the sheet metal structure 150 for the bed support leg, i.e., the side attached to the bed frame 30, the first side edge of the sheet metal body 1510 formed by the first front plate 1511, the first top plate 1513 and the first rear plate 1512 has a first U-shaped profile, and the first side edge is welded to the frame portion 130A of the bed foot unit, thereby attaching the sheet metal structure for the bed support leg to the frame portion of the bed foot unit. The second side of the sheet metal body 1510 on the second side of the bed foot sheet metal structure 150, i.e., the side opposite to the first side, can have a second U-shaped profile that is slightly smaller than the first U-shaped profile. This is because the first front plate 1511 and the first rear plate 1512 form a chamfer on the second side.

[0054] The upper cover 1520 has a similar configuration to the sheet metal body 1510. Specifically, Fig.13 , Fig.14 As shown, the upper cover 1520 includes an integrated second front plate 1521, a second rear plate 1522 and a second top plate 1523, wherein the second top plate 1523 is located between the second front plate 1521 and the second rear plate 1522, and the second front plate 1521 and the second rear plate 1522 are arranged substantially perpendicular to the second top plate 1523. On the first side of the bed support leg sheet metal structure 150, the second front plate 1521, the second top plate 1523 and the second rear plate 1522 form a third side edge of the upper cover 1520, and the third side edge forms a third "ㄇ"-shaped profile, and the transverse dimension of the third side edge is smaller than the transverse dimension of the first side edge, so that the transverse dimension of the third side edge is retracted on the first side edge, and such a design can avoid hindering the welding of the bed support leg sheet metal structure 150 and the support structure 130A.

[0055] On the second side of the bed support leg sheet metal structure 150, the side plate 1524 of the upper cover 1520 is an integrated structure with the second top plate 1523 of the upper cover 1520 and the first top plate 1513 of the sheet metal body 1510. In this way, when manufacturing the bed support leg sheet metal structure 150, the two can be formed in one piece, thereby increasing the stability of the structure and avoiding the welding process steps after separate manufacturing.

[0056] A threaded hole is provided on the first top plate 1513 of the sheet metal body 1510, or a nut can be welded on the surface of the first top plate 1513, so as to facilitate the connection between the bed support leg 140 and the bed support leg sheet metal structure 150. Usually, a stud is provided on the top of the bed support leg 140, and the bed support leg 140 can be fixed by screwing the stud into the threaded hole of the first top plate 1513 or fixing the stud into the nut of the first top plate 1513. The provision of the upper cover 1520 can prevent the stud from being partially exposed, so that for the structure of the elastic bed cover 130B covered on the support structure 130A, the bed cover will contact the second top plate 1523 of the upper cover 1520, so that it will not directly contact the stud when pressed down and thus be worn or damaged, such as being pierced.

[0057] Fig.15 Five steps for forming the sheet metal structure 150 of the bed leg of the present application are shown. First, a structural sheet 150A with the required contour is formed, and the relevant structures of each part have been reserved on the structural sheet; then, parts of the first front plate 1511 and the first rear plate 1512 are bent downward by 90 degrees to obtain the structure shown in Figure 150B; then, parts of the second front plate 1521 and the second rear plate 1522 are bent upward by 90 degrees to obtain the structure shown in Figure 150C; then, the structure of the upper cover part is bent as a whole by 90 degrees relative to the sheet metal body 1510 to obtain the structure shown in Figure 150D, and the first top plate 1513 has been formed at this time; finally, part of the second top plate 123 is bent downward by 90 degrees relative to part of the second side plate 1524 to obtain the structure shown in Figure 150E.

[0058] In addition, a screw hole is provided at the second end of the groove body 1121 away from the bedside support frame 110C, and the support leg 140 can be fixedly connected in the screw hole. The support legs of the bed midboard 120 can be, for example, four, connected in a rectangular position, or two, connected in a diagonal line. Fig.14 shown.

[0059] In some embodiments, at least two nuts are fixedly connected to each position on the bed midboard frame 120A corresponding to the first bed midboard support portion 110D and the second bed midboard support portion 130D, and corresponding positions of the headboard support frame 110C and the footboard support frame 130C are provided with protrusions to accommodate the nuts.

[0060] In some embodiments, eight evenly distributed nuts are fixed to the bed midboard frame 120A; the first bed midboard support portion 110D and the second bed midboard support portion 130D are connected to the nuts of the bed midboard frame 120A through supporting feet and / or screws.

[0061] In some embodiments, there are four legs matching the bed board, which are fixedly connected to the nuts through the first bed board support part 110D and the second bed board support part 130D in a rectangular distribution; or there are two legs matching the bed board, which are fixedly connected to the nuts of the bed board frame 120A through the first bed board support part 110D and the second bed board support part 130D in a diagonal distribution.

[0062] In some embodiments, the support leg is fixedly connected to the first bed mid-board support portion 110D and the second bed mid-board support portion 130D through a support leg sheet metal structure 150, wherein the upper surface of the fixed support leg sheet metal structure 150 is a plane, the lower surface of the fixed support leg sheet metal structure 150 is engaged with the support leg 140, and the position of the lower surface of the fixed support leg sheet metal structure 150 is flush with the lower surface of the groove-shaped body of the first bed mid-board support portion 110D or the second bed mid-board support portion 130D. Thus, the same support leg can be adapted to any position, that is, the support leg is interchangeable.

[0063] The installation process of the folding bed frame provided in the present invention is as follows:

[0064] Step 1: The first bed mid-plate support portion 110D and the second bed mid-plate support portion 130D are respectively flipped from the folded state to the unfolded state, and the pins are respectively inserted into the side frames to maintain the unfolded state.

[0065] Step 2: Align the first bed mid-board support portion 110D, the second bed mid-board support portion 130D and the corresponding connection positions of the bed mid-board;

[0066] Step 3: Install the bed feet and screws in the aligned mounting holes. The middle bed feet are installed diagonally / directly install 8 bed feet.

[0067] After installation, the folding bed Fig.16 , Fig.17 shown.

[0068] The preferred embodiments of the present invention are described above, but the spirit and scope of the present invention are not limited to the specific contents disclosed herein. Those skilled in the art can arbitrarily combine and expand the above embodiments according to the teachings of the present invention to make more implementation methods and applications within the spirit and scope of the present invention. The spirit and scope of the present invention are not limited by the specific embodiments, but by the claims.

Claims

1. A small-volume foldable bed frame, characterized in that: The invention discloses a package whose outer contour can be placed in a cubic configuration in a disassembled state, comprising a head unit (110), a mid-bed board (120) and a foot unit (130); in the disassembled state, the frame portion of the head unit (110) and the frame portion of the foot unit (130) are arranged relative to each other, and the mid-bed board (120) and the cover surface of the head unit (110) or the foot unit (130) are arranged relative to each other, so that the frame portion of the head unit (110) and the frame portion of the foot unit (130) are arranged relative to each other, and an annular storage space is formed between the covers of the head unit (110) and the foot unit (130).

2. The small-volume foldable bed frame according to claim 1, characterized in that: In the assembled state, the first mid-bed support portion (110D) of the head unit (110) is pivotally connected to the frame portion (110A) of the head unit, and the head unit bed cover (110B) is fixedly connected to the surface of the frame portion (110A) of the head unit. Similarly, the second mid-bed support portion (130D) of the foot unit (130) is fully opened, the second mid-bed support portion (130D) is pivotally connected to the frame portion (130A) of the foot unit, and the head unit bed cover (130B) is fixedly connected to the surface of the frame portion (130A) of the head unit. During installation, the first mid-bed support portion (110D) and the second mid-bed support portion (130D) are arranged relative to each other, so as to be fixed together to the bed frame (120A) at the bottom of the bed mid-board (120).

3. The small-volume foldable bed frame according to claim 2, characterized in that: The first bed mid-board support portion (110D) comprises a groove-shaped body (1121), and a first end of the groove-shaped body (1121) adjacent to the bedside support frame (110C) is provided with a pivot shaft (1122) pivotally connected to the bedside support frame (110C). With the aid of the pivot shaft (1122), the first bed mid-board support portion (110D) pivots around the bedside support frame (110C) as a whole, and a pin shaft hole and a pin shaft (1123) are also provided at this end. Through the pin shaft (1123), the first bed mid-board support portion (110D) is positioned on the side of the bedside support frame (110C) in a folded state and an unfolded state.

4. The small-volume foldable bed frame according to claim 2, characterized in that: At least two nuts are fixedly connected to each position on the bed mid-board frame (120A) corresponding to the first bed mid-board support portion (110D) and the second bed mid-board support portion (130D), and corresponding positions of the head support frame (110C) and the foot support frame (130C) are provided with protrusions to accommodate the nuts.

5. The small-volume foldable bed frame according to claim 4, characterized in that: The bed-mid-board frame (120A) is fixedly connected with eight evenly distributed nuts; the first bed-mid-board support portion (110D) and the second bed-mid-board support portion (130D) are connected to the nuts of the bed-mid-board frame (120A) via supporting feet and / or screws.

6. The small-volume foldable bed frame according to claim 5, characterized in that: There are four supporting legs matching the bed mid-board, which are distributed in a rectangular shape and fixedly connected to the nut through the first bed mid-board supporting portion (110D) and the second bed mid-board supporting portion (130D); Alternatively, the supporting legs matching the bed midboard are two and are fixedly connected to the nuts of the bed midboard frame (120A) through the first bed midboard supporting portion (110D) and the second bed midboard supporting portion (130D) in a diagonal distribution.

7. The small-volume foldable bed frame according to claim 5, characterized in that: The support leg is fixedly connected to the first bed mid-board support portion (110D) and the second bed mid-board support portion (130D) via a support leg sheet metal structure (150), wherein the upper surface of the fixed support leg sheet metal structure (150) is a plane, the lower surface of the fixed support leg sheet metal structure (150) is engaged with the support leg (140), and the position of the lower surface of the fixed support leg sheet metal structure (150) is flush with the lower surface of the groove-shaped body of the first bed mid-board support portion (110D) or the second bed mid-board support portion (130D).

8. The small-volume foldable bed frame according to claim 1, characterized in that: It also includes a headboard support frame (110C), which is connected to the frame part (110A) of the headboard unit; and / or it also includes a footboard support frame (130C), which is connected to the frame part (130A) of the footboard unit, and the headboard support frame and / or the footboard support frame are rolling support frames.

9. The small-volume foldable bed frame according to claim 8, characterized in that: The rolling support frame includes two support arms and a crossbeam fixedly connected between the two support arms, wherein the two support arms are respectively hinged to the two side frames of the frame part, and the crossbeam spans between the two support arms and is fixedly connected; wherein any one of the support arms includes a first section hinged to the side frame of the frame part and a second section arranged at a first angle to the first section in the length direction, wherein the first section includes a hinge part and a bending part, the hinge part is adjacent to and hinged to the side frame, the bending part forms a structure inwardly retracted in the width direction and is connected to the second section; the two ends of the crossbeam are respectively configured to include a shape that complies with at least a part of the bending part so as to be connected between at least a part of the bending part of the first section of the two support arms; the first roller and / or the second roller are respectively coupled to the two support arms.

10. The small-volume foldable bed frame according to claim 8, characterized in that: Both ends of the cross beam are respectively configured to include a shape that complies with a portion of the hinge portion, so as to be connected between at least a portion of the hinge portions of the first sections of the two supporting arms.

11. The small-volume foldable bed frame according to claim 8, characterized in that: An arc-shaped corner joint is also provided between the support arm and the cross beam.

12. The small-volume foldable bed frame according to claim 8, characterized in that: The first roller and / or the second roller is installed on the inner side of the support arm.

13. The small-volume foldable bed frame according to claim 8, characterized in that: The first roller and / or the second roller are installed on the outer side of the support arm; the width behind the first roller and / or the second roller does not exceed the plane where the first section is located, that is, the widest part of the rolling support frame is the distance between the outer sides of the first sections of the two support arms.

14. The small-volume foldable bed frame according to claim 8, characterized in that: The first roller is installed at the connection between the first section and the second section.

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