Foldable bed frame

Abstract

A foldable bed frame, comprising: a first frame (10) and a second frame (20) arranged opposite to each other in a height direction; and a support frame connected between the first frame (10) and the second frame (20). One end of the support frame is rotatably connected to the first frame (10), and the other end is rotatably connected to the second frame (20). The support frame, the first frame (10), and the second frame (20) form a first side and a second side opposite to each other in a first direction. The support frame comprises a first support frame (30) located on the first side and a second support frame (40) located on the second side. The foldable bed frame has an unfolded state, a first folded state, and a second folded state. When the foldable bed frame is folded from the unfolded state to the first folded state, the first frame (10) rotates in the first direction relative to the first support frame (30). When the foldable bed frame is folded from the first folded state to the second folded state, the first support frame (30) rotates in the first direction relative to the second frame (20). The foldable bed frame has a simple structure, can be folded twice, occupies little space, and has good portability.

Description

Foldable bed frame

[0001] Related applications

[0002] The present application claims priority to the Chinese patent application No. 202410958324.X, filed on July 16, 2024, and entitled "Foldable bed frame", the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of baby cribs, and in particular to a foldable bed frame. BACKGROUND

[0004] A baby crib support usually has a use state and a folded state, and is convenient to carry when in the folded state. Therefore, a folding mechanism needs to be added to the baby crib support to facilitate folding of the baby crib. However, the structure of the conventional baby crib folding mechanism is relatively complex, the cost is high, and the folding mechanism itself has a large volume and weight, which occupies a lot of space after folding and has poor portability. SUMMARY

[0005] Therefore, it is necessary to provide a foldable bed frame to solve the problem of a large volume of the folding mechanism of a baby crib.

[0006] A foldable bed frame, the foldable bed frame comprising a first frame and a second frame oppositely arranged in a height direction, and a support frame connected between the first frame and the second frame, one end of the support frame being rotationally connected with the first frame, and the other end being rotationally connected with the second frame, the support frame and the first frame and the second frame forming a first side and a second side opposite in a first direction, the support frame comprising a first support frame located at the first side and a second support frame located at the second side. The foldable bed frame has an unfolded state, and a first folded state and a second folded state, when the foldable bed frame is folded from the unfolded state to the first folded state, the first frame rotates relative to the first support frame in the first direction, and when the foldable bed frame is folded from the first folded state to the second folded state, the first support frame rotates relative to the second frame in the first direction.

[0007] In the foldable bed frame according to the embodiments of the present application, by arranging the first support frame between the first frame and the second frame, and the first support frame being rotatable relative to the first frame and the second frame, the foldable bed frame can reach the folded state after being folded twice from the unfolded state, and has small space occupation and high portability; and the foldable bed frame has a simple structure and low cost.

[0008] In one embodiment, the second support frame comprises a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod being pivotable relative to each other to adjust the distance between the connection point of the second support frame with the first frame and the connection point of the second support frame with the second frame.

[0009] In one embodiment, the first link and the second link are relatively pivotable along a plane in which the second side is located.

[0010] In one embodiment, the first link and the second link are relatively pivotable in a direction towards or away from the first support frame.

[0011] In one embodiment, the first link and the second link are connected by a connector, the connector limiting the direction of relative pivoting of the first link and the second link.

[0012] In one embodiment, the connector is provided with a U-shaped slot, each of the first end and the second end of the connector opposite to each other is provided with a first opening and a second opening in communication with each other, the first link is hinged within the U-shaped slot through the first opening at the first end of the connector, and the second link is hinged within the U-shaped slot through the first opening at the second end of the connector. When the first link and the second link are relatively pivoted, the first link and the second link are rotated between a state of passing through the first opening and a state of passing through the second opening, respectively.

[0013] In one embodiment, the connector is provided with a partition, the partition separates the U-shaped slot into a first sub-slot and a second sub-slot, the first opening and the second opening at the first end of the connector are both in communication with the first sub-slot, the first link is hinged within the first sub-slot, and the first opening and the second opening at the second end of the connector are both in communication with the second sub-slot, the second link is hinged within the second sub-slot.

[0014] In one embodiment, the foldable bed frame is provided with two second support frames, the second openings of the two connectors of the two second support frames are oriented in the same direction or opposite directions.

[0015] In one embodiment, the second openings of the two connectors are both oriented in a positive direction of the second direction or a negative direction of the second direction.

[0016] In one embodiment, the second openings of the two connectors are oriented in opposite directions or away from each other in the second direction.

[0017] In one embodiment, the first frame comprises a first surrounding rod and a second surrounding rod arranged oppositely, and two pipes arranged oppositely at the first side and the second side respectively, the first surrounding rod and the second surrounding rod are arranged between the first side and the second side, one end of the first support frame is rotatably connected with one of the two pipes, the other end of the first support frame is rotatably connected with the second frame, one end of the second support frame is rotatably connected with the other of the two pipes, and the other end of the second support frame is rotatably connected with the second frame. The first surrounding rod and the second surrounding rod each comprise a third connecting rod and a fourth connecting rod, the third connecting rod and the fourth connecting rod are pivotably connected through a link piece, so that the third connecting rod and the fourth connecting rod can be pivoted relative to each other to adjust the distance between the connection point of the first frame and the first support frame and the connection point of the first frame and the second support frame.

[0018] In one embodiment, the link piece is provided with a U-shaped slot, each of the opposite first end and the second end of the link piece is provided with a first opening and a second opening which are in communication with each other, the third connecting rod is hinged in the U-shaped slot through the first opening at the first end of the link piece, and the fourth connecting rod is hinged in the U-shaped slot through the first opening at the second end of the link piece. When the third connecting rod and the fourth connecting rod are pivoted relative to each other, the third connecting rod and the fourth connecting rod are rotated between the state of passing through the first opening and the state of passing through the second opening respectively.

[0019] In one embodiment, the second openings of the two link pieces of the first surrounding rod and the second surrounding rod each face the positive direction of the third direction or the negative direction of the third direction.

[0020] In one embodiment, the second support frame comprises a support member which is arranged obliquely between the first frame and the second frame, one end of the support member is rotatably connected with one of the first frame and the second frame, and the other end of the support member is rotatably and slidably connected with the other of the first frame and the second frame.

[0021] In one embodiment, the support member comprises a first support member and a second support member, the upper end of the first support member is rotatably connected with the first frame, the lower end of the first support member is rotatably and slidably connected with the second frame, the upper end of the second support member is rotatably and slidably connected with the first frame, and the lower end of the second support member is rotatably connected with the second frame. The first support member and the second support member are arranged at one of the first side and the second side.

[0022] In one embodiment, in the first stage of folding the foldable bed frame from the unfolded state to the first folded state, the rotatable and slidable connection of the second support member and the first frame slides in a direction away from the rotatable connection of the first support member and the first frame, and the rotatable and slidable connection of the first support member and the second frame slides in a direction away from the rotatable connection of the second support member and the second frame.

[0023] In one embodiment, in the second stage of folding the foldable bedstead from the unfolded state to the first folded state, the rotating and sliding connection between the second support and the first frame slides towards the direction close to the rotating connection between the first support and the first frame, and the rotating and sliding connection between the first support and the second frame slides towards the direction close to the rotating connection between the second support and the second frame.

[0024] In one embodiment, the second support frame comprises a first connecting rod and a second connecting rod, and the first connecting rod is telescopically connected with the second connecting rod.

[0025] In one embodiment, the foldable bedstead further comprises a rotating connector, which comprises a sleeve through which the first frame or the second frame passes and which can rotate around its own axis relative to the first frame or the second frame passing therethrough, and a connecting portion connected to the substantially middle position of the sleeve and articulated to the first support frame or the second support frame.

[0026] In one embodiment, a first pair of folding portions are respectively arranged on the opposite sides of the first frame, and a second pair of folding portions are respectively arranged on the corresponding opposite sides of the second frame, and when the foldable bedstead reaches the second folded state, the first frame can be folded through the first pair of folding portions and the second frame can be folded through the second pair of folding portions. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on the disclosed drawings.

[0028] Fig. 1 is a structural schematic view of the foldable bedstead in the first embodiment of the present application in an unfolded state.

[0029] Fig. 2 is a structural schematic view of the foldable bedstead in the first embodiment of the present application in a first stage of folding from the unfolded state to the first folded state.

[0030] Fig. 3 is a structural schematic view of the foldable bedstead in the first embodiment of the present application in the first folded state.

[0031] Fig. 4 is a structural schematic view of the foldable bedstead in the first embodiment of the present application in a second folded state.

[0032] Fig. 5 is a structural schematic view of the foldable bedstead in the second embodiment of the present application in an unfolded state.

[0033] Fig. 6 is a schematic view of the foldable bed frame of the second embodiment of the present application in the first stage of folding from the unfolded state to the first folded state.

[0034] Fig. 7 is a schematic view of the foldable bed frame of the second embodiment of the present application in the unfolded state.

[0035] Fig. 8 is a schematic view of the foldable bed frame of the second embodiment of the present application in the first stage of folding from the unfolded state to the first folded state.

[0036] Fig. 9 is a schematic view of the foldable bed frame of the third embodiment of the present application in the unfolded state.

[0037] Fig. 10 is a schematic view of the foldable bed frame of the fourth embodiment of the present application in the second folded state.

[0038] Legend: 10, first frame; 11, first surrounding rod; 111, third connecting rod; 112, fourth connecting rod; 12, second surrounding rod; 20, second frame; 30, second support frame; 40, first support frame; 41, first connecting rod; 42, second connecting rod; 43, first support member; 44, second support member; 50, connecting member; 51, U-shaped groove member; 511, first opening; 512, first hinge hole; 513, second hinge hole; 514, second opening; 515, partition; 60, rotating connector; 61, sleeve; 62, connecting portion; 621, recess; 70, first folding portion; 80, second folding portion; D1, first rotating direction; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a mediating element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a mediating element. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0042] For the convenience of description, the following directional terms are defined in conjunction with the X-axis, Y-axis and Z-axis shown in the drawings. The extension direction of the straight line on which the X-axis lies is the first direction (also referred to as direction X), the direction indicated by the arrow of the X-axis is the positive direction of the first direction, and the direction opposite to the positive direction of the first direction is the negative direction of the first direction. The extension direction of the straight line on which the Y-axis lies is the second direction (also referred to as direction Y), the direction indicated by the arrow of the Y-axis is the positive direction of the second direction, and the direction opposite to the positive direction of the second direction is the negative direction of the second direction. The extension direction of the straight line on which the Z-axis lies is the third direction (also referred to as direction Z), the direction indicated by the arrow of the Z-axis is the positive direction of the third direction, and the direction opposite to the positive direction of the third direction is the negative direction of the third direction. The third direction is also referred to as the height direction. Alternatively, the first direction is perpendicular to the second direction and the third direction, and the second direction is perpendicular to the third direction. The horizontal direction referred to herein can include the first direction and the second direction.

[0043] Referring to FIG. 1, FIG. 1 shows a structural schematic view of a foldable bed frame in the first embodiment of the present application. The foldable bed frame provided by the embodiment of the present application includes a first frame 10, a second frame 20 and a support frame connected between the first frame 10 and the second frame 20. The foldable bed frame can serve as a support structure of a baby bed to provide a safe and stable sleeping environment for a baby.

[0044] The first frame 10 and the second frame 20 are oppositely arranged in the height direction, and the first frame 10 is located above the second frame 20. When the foldable crib is placed on the ground, bed surface or other support platform, the frame in contact with the ground, bed surface or other support platform is defined as the second frame 20. In alternative embodiments, the first frame 10 and the second frame 20 are approximately rectangular, of course, they can also be other shapes.

[0045] The support frames are located between the first frame 10 and the second frame 20, and the upper end of the support frame is rotatably connected to the first frame 10, and the lower end of the support frame is rotatably connected to the second frame 20. Under the support of the support frame, the first frame 10 and the second frame 20 can maintain the relative arrangement form, thereby maintaining the unfolded state of the support frame.

[0046] Referring to FIG. 1, the support frame, one side of the first frame 10 and one side of the second frame 10 are all located in the same plane, which is defined as the first side. The other support frame, the other side of the first frame 10 and the other side of the second frame 10 are all located in another plane, which is defined as the second side. It can be understood that the first side and the second side are oppositely arranged in the horizontal direction, specifically in the first direction. It should be noted that the relative arrangement described herein is not limited to absolute parallel arrangement. As shown in FIG. 1, the support frames located on the first side and the second side can be arranged obliquely relative to the height direction, so that the planes on which the first side and the second side are located are arranged at an angle. In this embodiment, referring to FIG. 1, the support frame includes a first support frame 30 located on the first side and a second support frame 40 located on the second side. As shown in FIG. 1, in this embodiment, two first support frames 30 and two second support frames 40 are arranged between the first frame 10 and the second frame 20, and the two ends of the first support frame 30 and the second support frame 40 are rotatably connected to the first frame 10 and the second frame 20, respectively. Of course, the number of first support frames 30 and second support frames 40 is not limited to this, and can also be other numbers. Since the first support frame 30 and the second support frame 40 are rotatably connected to the first frame 10 and the second frame 20, respectively, the first frame 10 can be pivoted relative to the first support frame 30 and the second support frame 40, and the second frame 20 can also be pivoted relative to the first support frame 30 and the second support frame 40. The area enclosed by the first support frame 30, the second support frame 40, the first frame 10 and the second frame 20, and the first frame 10 and the second frame 20 can cover the fabric (not shown in the figure) to shield the internal space formed by the foldable crib, thereby preventing dust and preventing the baby from accidentally falling off the edge of the crib.

[0047] When the foldable bed frame is in the unfolded state shown in Fig. 1 and needs to be folded, the first frame 10 can be first rotated relative to the first support frame 30 in the first rotation direction D1, or in other words, the first frame 10 is rotated in a direction towards the first support frame 30, and the included angle between the first support frame 30 and the first frame 10 gradually decreases, as shown in Fig. 2. When the first frame 10 and the first support frame 30 are rotated to the position shown in Fig. 3, the foldable bed frame reaches the first folded state. In other words, when the foldable bed frame is folded from the unfolded state to the first folded state, the tubes on the second side of the first frame 10 are rotated towards the tubes on the first side of the second frame 20. In the case where the length of the side of the first frame 10 parallel to the X axis is substantially equal to or slightly less than the first support frame 30, when the foldable bed frame is switched from the unfolded state to the first folded state through folding, the side of the first frame 10 on the second side can be close to the side of the second frame 20 on the first side.

[0048] After the foldable bed frame reaches the first folded state, the first support frame 30 is also rotated relative to the second frame 20 in the first rotation direction D1, or in other words, the second frame 20 is rotated in a direction towards the first support frame 30 in the opposite direction of the first rotation direction D1, and the included angle between the first support frame 30 and the second frame 20 gradually decreases until the first support frame 30 and the second frame 20 are close to each other, so that the planes where they are located are also close to parallel, at which time, as shown in Fig. 4, the foldable bed frame reaches the second folded state. In other words, when the foldable bed frame is folded from the first folded state to the second folded state, the tubes on the first side of the first frame 10 are rotated towards the tubes on the second side of the second frame 20.

[0049] The foldable bed frame provided in the present application, by arranging the first support frame 30 between the first frame 10 and the second frame 20, and the first support frame 30 being rotatable relative to the first frame 10 and the second frame 20, so that the foldable bed frame can be changed from the unfolded state to the second folded state shown in Fig. 4 through the first folded state shown in Fig. 3, occupying a small space and having high portability; and the foldable bed frame has a simple structure and low cost.

[0050] In some embodiments, in order to prevent the first support frame 30 from rotating relative to the second frame 20 in a direction opposite to the first direction during the folding process (in this case, the folding cannot be achieved due to the pulling of the fabric), the foldable bed frame can further comprise a second support frame 40, the distance between the upper end (the connection end of the second support frame 40 and the first frame 10) and the lower end (the connection end of the second support frame 40 and the second frame 20) of the second support frame 40 can be adjusted. Referring to FIG. 1, for example, the second support frame 40 is arranged on the second side. In this embodiment, the number of the second support frame 40 is two, and the second support frame 40 corresponds to the first support frame 30 one-to-one. Of course, the number of the second support frame 40 is not limited to this, and can be other numbers.

[0051] In some embodiments, for example, as shown in FIG. 1, the second support frame 40 comprises a first connecting rod 41 and a second connecting rod 42. The first connecting rod 41 is located above the second connecting rod 42, the upper end of the first connecting rod 41 is rotationally connected to the pipe of the first frame 10 on the second side, the lower end of the second connecting rod 42 is rotationally connected to the pipe of the second frame 20 on the second side, and the lower end of the first connecting rod 41 is movably connected to the upper end of the second connecting rod 42. The movable connection mentioned here can be a rotational connection, a sliding connection or other connection modes, and the purpose is to adaptively shorten or increase the distance between the upper end of the first connecting rod 41 and the lower end of the second connecting rod 42 during the folding process of the foldable bed frame, so as to avoid that the fabric connected between the various support frames and the frames may hinder the folding of the bed body during the actual folding process of the bed body.

[0052] During the folding process from the unfolded state to the first folded state, the first frame 10 rotates relative to the first support frame 30 in the first rotation direction D1, and the second connecting rod 42 pivots relative to the second frame 20. It can be understood that, with reference to FIGS. 1-3, during the above process, the angle between the second connecting rod 42 and the plane in which the second frame 20 is located gradually decreases, and finally the second support frame 40 and the second frame 20 tend to be attached, so that the planes in which they are located tend to be parallel.

[0053] Under the support of the first support frame 30 and the second support frame 40, the foldable bed frame can be more stably maintained in the unfolded state; the first connecting rod 41 and the first frame 10 are arranged in a rotational connection, the second connecting rod 42 and the second frame 20 are arranged in a rotational connection, and the first connecting rod 41 and the second connecting rod 42 are arranged in a movable connection, which can prevent the second support frame 40 from hindering the folding of the foldable bed frame.

[0054] Optionally, in the present embodiment, the second support frame 40 is further provided with a connecting piece 50 connected between the first connecting rod 41 and the second connecting rod 42, and the first connecting rod 41 and the second connecting rod 42 are both rotationally connected with the connecting piece 50. For example, as shown in FIG. 1, FIG. 2 and FIG. 3, the connecting piece 50 is a U-shaped groove piece 51 provided with a U-shaped groove. In the length direction of the U-shaped groove, the opposite first end and second end of the U-shaped groove piece 51 are respectively formed with a first opening 511 (the first opening 511 at the lower end is not labeled). When the connecting piece 50 is installed, the two first openings 511 are respectively used to guide the first connecting rod 41 and the second connecting rod 42 to be inserted into the U-shaped groove. The U-shaped groove piece 51 is provided with a first hinge hole 512 and a second hinge hole 513, a hinge shaft (not shown in the figure) passes through the first hinge hole 512 and the first connecting rod 41, so that the first connecting rod 41 is hinged with the U-shaped groove piece 51; similarly, another hinge shaft passes through the second hinge hole 513 and the second connecting rod 42, so that the second connecting rod 42 is hinged with the U-shaped groove piece 51.

[0055] Continuing to refer to FIGS. 1 and 2, each second support frame 40 is provided with a link member 50. Taking the U-shaped groove member 51 on the right side in FIGS. 1 and 2 (i.e., the U-shaped groove member 51 shown in the partial enlarged view in FIGS. 1 and 2) as an example, a second opening 514 is formed on the side of the U-shaped groove member 51 facing the negative direction of the second direction, and the second opening 514 is in communication with the first opening 511 of the U-shaped groove. In the present embodiment, the U-shaped groove member 51 is provided with two second openings 514, one of which is arranged at the first end, e.g., the upper end, of the U-shaped groove member 51 and is in communication with the first opening 511 on the first end of the U-shaped groove member 51, and the other of which is arranged at the second end, e.g., the lower end, of the U-shaped groove member 51 and is in communication with the first opening 511 on the second end of the U-shaped groove member 51. When the foldable bed frame is in the unfolded state, as shown in FIG. 1, the lower end of the first connecting rod 41 and the upper end of the second connecting rod 42 are arranged in the first opening 511 on the upper end of the U-shaped groove member 51 and the first opening 511 on the lower end of the U-shaped groove member 51 (not labeled in the figure), respectively. As can be understood with reference to FIGS. 1 and 2, in the first stage of folding the foldable bed frame from the unfolded state to the first folded state, the distance between the upper connecting point of the first connecting rod 41 (i.e., the connecting point of the first connecting rod 41 and the first frame 10) and the lower connecting point of the second connecting rod 42 (i.e., the connecting point of the second connecting rod 42 and the second frame 20) is shortened, and the first connecting rod 41 gradually rotates from the state of passing through the first opening 511 to the state of passing through the second opening 514, as shown in FIG. 2. Referring again to FIGS. 2 and 3, in the second stage of folding the foldable bed frame from the unfolded state to the first folded state, the distance between the upper connecting point of the first connecting rod 41 and the lower connecting point of the second connecting rod 42 is increased, and the first connecting rod 41 gradually rotates from the state of passing through the second opening 514 to the state of passing through the first opening 511, as shown in FIG. 3. It should be understood that FIG. 2 schematically shows a state of the foldable bed frame at a certain time during the folding process from the unfolded state to the first folded state, and does not mean that the state of the foldable bed frame shown in FIG. 2 is exactly the transition state between the first stage and the second stage.

[0056] Similarly, in the first stage of folding the foldable bed frame from the unfolded state to the first folded state, the second connecting rod 42 gradually rotates from the state of passing through the first opening 511 to the state of passing through the second opening 514, and assumes the form shown in FIG. 2. In the second stage of folding the foldable bed frame from the unfolded state to the first folded state, the second connecting rod 42 gradually rotates from the state of passing through the second opening 514 to the state of passing through the first opening 511, as shown in FIG. 3.

[0057] The U-shaped groove member 51 connects the first link rod 41 and the second link rod 42, and provides a limiting effect for the hinged rotation of the first link rod 41 and the second link rod 42. The limiting effect restricts the relative rotation direction of the first link rod 41 and the second link rod 42, and helps to keep the first link rod 41 and the second link rod 42 stable during rotation. The limiting effect can reduce the deformation of the second support frame 40 during the repeated unfolding and folding of the foldable bed frame.

[0058] Further, the connecting member 50 is provided with a locking mechanism (not shown in the figure). The locking mechanism is used to lock the first link rod 41 relative to the U-shaped groove member 51 so that the relative rotation between them cannot occur, and is used to lock the second link rod 42 relative to the U-shaped groove member 51 so that the relative rotation between them cannot occur, to maintain the stability of the foldable bed frame. In an exemplary embodiment, the locking mechanism is a latch. Taking the latch that limits the rotation of the first link rod 41 as an example, the U-shaped groove member 51 is provided with a pin hole, and the latch is inserted into the pin hole. The end of the first link rod 41 is provided with a insertion hole, which is opposite to the pin hole. The latch is continuously inserted in the direction close to the end of the first link rod 41 until it is inserted into the insertion hole, so that the first link rod 41 is fixed and prevented from continuing to rotate. Similarly, another locking mechanism can be used to limit the rotation of the second link rod 42. When the first link rod 41 and the second link rod 42 are both locked relative to each other, the overall structure of the foldable bed frame is stable and cannot be unfolded or folded, which helps to keep the foldable bed frame stable in the use state or the folded state.

[0059] In some embodiments, for example, in the embodiment shown in FIG. 2, the two connecting members 50 are located at substantially the same height. The second openings 514 of the two connecting members 50 are oppositely arranged in the second direction. Understandably, in the first stage of the folding process of the foldable bed frame from the unfolded state to the first folded state, the first link rod 41 and the second link rod 42 are relatively pivoted on the second side towards the outside of the foldable bed frame, at this time, the two connecting members 50 are away from each other in the second direction. In the second stage of the folding process of the foldable bed frame from the unfolded state to the first folded state, the first link rod 41 and the second link rod 42 are relatively pivoted on the first side towards the inside of the foldable bed frame, at this time, the two connecting members 50 are close to each other in the second direction.

[0060] In other embodiments, the second openings 514 of the two connecting members 50 are arranged away from each other in the second direction. Understandably, in the first stage of the folding process of the foldable bed frame from the unfolded state to the first folded state, the first link rod 41 and the second link rod 42 are relatively pivoted towards the inside. At this time, the two connecting members 50 are close to each other in the second direction. In the second stage of the folding process of the foldable bed frame from the unfolded state to the first folded state, the first link rod 41 and the second link rod 42 are relatively pivoted on the first side towards the outside, at this time, the two connecting members 50 are away from each other in the second direction.

[0061] In the above-mentioned embodiments in which the second openings 514 of the two adapters 50 are arranged opposite to each other or face away from each other in the second direction, the rotation radius of the tube member on the first side of the first frame 10 is always perpendicular to the direction of relative movement of the two adapters 50 during the folding of the foldable bed frame from the unfolded state to the first folded state.

[0062] In other embodiments, the second openings 514 of the two adapters 50 both face the corresponding first support frame 30, i.e., face the negative direction of the first direction, or face the first side. In this way, during the first stage of the folding of the foldable bed frame from the unfolded state to the first folded state, the two adapters 50 both move in the positive direction of the first direction in the first direction. During the second stage of the folding of the foldable bed frame from the unfolded state to the first folded state, the two adapters 50 both move in the negative direction of the first direction.

[0063] In other embodiments, the second openings 514 of the two adapters 50 both face the positive direction of the first direction, or face the direction from the first side to the second side. In this way, during the first stage of the folding of the foldable bed frame from the unfolded state to the first folded state, the two adapters 50 both move in the negative direction of the first direction in the first direction. During the second stage of the folding of the foldable bed frame from the unfolded state to the first folded state, the two adapters 50 both move in the positive direction of the first direction.

[0064] In some embodiments, referring to FIG. 1, the U-shaped groove member 51 can be provided with a partition 515 for partitioning the U-shaped groove into a first sub-groove and a second sub-groove. The first opening 511 and the second opening 514 at the upper end of the U-shaped groove member 51 both communicate with the first sub-groove, and the first opening 511 and the second opening 514 at the lower end of the U-shaped groove member 51 both communicate with the second sub-groove. The lower end of the first connecting rod 41 is inserted into the first sub-groove, and the upper end of the second connecting rod 42 is inserted into the second sub-groove. The provision of the partition 515 can prevent the ends of the first connecting rod 41 and the second connecting rod 42 from colliding during the installation and folding of the foldable bed frame, thereby improving the durability of the foldable bed frame.

[0065] In some embodiments, referring to FIG. 2, the foldable bed frame further comprises a plurality of rotating connectors 60, through which the rotating connection between the first support frame 30 and the first frame 10 and the second frame 20, the rotating connection between the first link 41 and the first frame 10, the rotating connection between the second link 42 and the second frame 20, and the relative rotation between the first link 41 and the second link 42 are achieved. Referring to FIGS. 2 and 4, the rotating connector 60 comprises a sleeve 61 and a connecting portion 62, which is connected to the substantially middle position of the sleeve 61, so that the entire rotating connector 60 is approximately in the shape of a "T". Taking one of the rotating connectors 60 provided on the first frame 10 as an example, the first frame 10 passes through the sleeve 61, and the sleeve 61 can rotate relative to the first frame 10 about the axis of the sleeve 61 itself. The upper end of the first link 41 is hinged to the connecting portion 62, which is provided with a recess 621 to allow the first link 41 to be hingedly rotated. Similarly, the lower end of the second link 42 is hinged to the connecting portion 62 of the rotating connector 60 provided on the second frame 20. In this way, the relative rotation between the first link 41 and the second link 42 is achieved.

[0066] The rotating connector 60 can also be provided with the locking mechanism described in the above embodiments (not shown in the figure). In this case, the rotating connector 60 is provided with a pin hole, and a pin is inserted into the pin hole. The first frame 10 or the second frame 20 is provided with a plug hole, and the pin is inserted into the plug hole. At this time, the pin passes through the pin hole and the plug hole at the same time, so that the rotating connector 60 cannot rotate relative to the first frame 10 or the second frame 20, and the foldable bed frame can be kept stable.

[0067] In some other embodiments, the first link 41 and the second link 42 are connected in a relative telescopic manner (not shown in the figure) without the need for the connection through the above-mentioned engaging member 50. For example, one of the first link 41 and the second link 42 is provided with a sliding groove on its surface, and the other is provided with a protrusion on its surface, which is embedded in the sliding groove and can move along the sliding groove, so that the first link 41 and the second link 42 can move relative to each other. In the process of folding the foldable bed frame, the relative position of the first link 41 and the second link 42 can be adaptively changed, which will not hinder the folding action. For another example, one of the first link 41 and the second link 42 has a hollow structure and forms a sliding groove, and the other is at least partially movably arranged in the sliding groove, so that the first link 41 and the second link 42 constitute a telescopic rod structure (not shown in the figure). In these embodiments, the second support frame 40 also does not hinder the folding of the foldable bed frame.

[0068] In the second embodiment of the present application, the distance between the connection point of the first frame 10 and the first support frame 30 to the connection point of the first frame 10 and the second support frame 40 is adjustable. Referring to FIG. 5, the two opposite sides of the first frame 10 are provided with the linkers 50 as described in the above embodiment instead of the second support frame 40. Exemplarily, the two second support frames 40 are single rod structures instead of being divided into the first link 41 and the second link 42. The first frame 10 comprises the first surrounding rod 11 and the second surrounding rod 12 arranged oppositely and two pipe fittings arranged oppositely. The two pipe fittings are arranged at the first side and the second side respectively. The two ends of the first surrounding rod 11 are connected to the ends of the two pipe fittings through the linkers 50 respectively, and the two ends of the second surrounding rod 12 are also connected to the other ends of the two pipe fittings through the linkers 50 respectively, so that when the foldable bed frame is in the unfolded state, the first surrounding rod 11, the second surrounding rod 12 and the two pipe fittings form a substantially rectangular frame structure. Taking the first surrounding rod 11 as an example, the first surrounding rod 11 comprises the third link 111 and the fourth link 112, and the third link 111 and the fourth link 112 are also connected through a linker 50, so that the third link 111 and the fourth link 112 can rotate relatively. Optionally, the second surrounding rod 12 has the same structure as the first surrounding rod 11.

[0069] In some embodiments, referring to FIGS. 5 and 6, the second openings 514 of the two linkers 50 on the first surrounding rod 11 and the second surrounding rod 12 are arranged to face in opposite directions in the second direction. For example, the second openings 514 of the two linkers 50 arranged on the first surrounding rod 11 and the second surrounding rod 12 and connected between the third link 111 and the fourth link 112 are oppositely arranged in the second direction. In the first stage of folding the foldable bed frame from the unfolded state to the first folded state, as shown in FIG. 6, the two linkers 50 on the first surrounding rod 11 and the second surrounding rod 12 can move relatively away, without hindering the folding action of the foldable bed frame. In the second stage of folding the foldable bed frame from the unfolded state to the first folded state, the two linkers 50 on the first surrounding rod 11 and the second surrounding rod 12 can move relatively close.

[0070] In other embodiments, the openings of the two linkers 50 on the first surrounding rod 11 and the second surrounding rod 12 are oppositely or oppositely away arranged in the second direction (not shown). In the first stage of folding the foldable bed frame from the unfolded state to the first folded state, the two linkers 50 on the first surrounding rod 11 and the second surrounding rod 12 can move relatively close, without hindering the folding action of the foldable bed frame. In the second stage of folding the foldable bed frame from the unfolded state to the first folded state, the two linkers 50 on the first surrounding rod 11 and the second surrounding rod 12 can move relatively away.

[0071] In some embodiments, referring to FIG. 7, the openings of the two connectors 50 on the first and second side rails 11 and 12 are both arranged upward, i.e., in the positive direction of the third direction. In the first stage of folding the foldable bed frame from the unfolded state to the first folded state, the two connectors 50 on the first and second side rails 11 and 12 can be moved in the negative direction of the third direction, respectively, without hindering the folding action of the foldable bed frame. In the second stage of folding the foldable bed frame from the unfolded state to the first folded state, the two connectors 50 on the first and second side rails 11 and 12 can be moved in the positive direction of the third direction, respectively.

[0072] In some embodiments, referring to FIG. 8, the openings of the two connectors 50 on the first and second side rails 11 and 12 are both arranged downward, i.e., in the negative direction of the third direction. In the first stage of folding the foldable bed frame from the unfolded state to the first folded state, the two connectors 50 on the first and second side rails 11 and 12 can be moved in the positive direction of the third direction, respectively, without hindering the folding action of the foldable bed frame. In the second stage of folding the foldable bed frame from the unfolded state to the first folded state, the two connectors 50 on the first and second side rails 11 and 12 can be moved in the negative direction of the third direction, respectively.

[0073] Optionally, the two connectors 50 can be arranged at the two short sides of the first frame 10, or at the two long sides of the first frame 10; the two connectors 50 can also be arranged at the two short sides of the second frame 20, or at the two long sides of the second frame 20.

[0074] In the third embodiment of the present application, as shown in FIG. 9, the second support frame 40 comprises support members arranged obliquely between the first frame 10 and the second frame 20, one end of each support member being rotatably connected to one of the first frame 10 and the second frame 20, and the other end being rotatably and slidably connected to the other one of the first frame 10 and the second frame 20. The foldable bed frame is folded by the first support frame 30 and the second support frame 40. Exemplarily, in the present embodiment, four support members are arranged at the second side, of which two support members are arranged at the left side of the second side, and two support members are arranged at the right side of the second side. Taking the two support members at the left side of the second side as an example, the upper end of the first support member 43 is rotatably connected to the first frame 10, and the lower end is slidably connected to the second frame 20; the upper end of the second support member 44 is slidably connected to the first frame 10, and the lower end is rotatably connected to the second frame 20. It can be understood that only two support members can be arranged at the second side.

[0075] From the perspective of Fig. 9, the first support 43 and the second support 44 are arranged crosswise. In a first phase of folding the foldable bed frame from the unfolded state to the first folded state, i.e. folding the first frame 10 towards the first support frame 30, the swivel and sliding connection of the second support 44 to the first frame 10 slides in a direction away from the swivel connection of the first support 43 to the first frame 10, and likewise the swivel and sliding connection of the first support 43 to the second frame 20 slides in a direction away from the swivel connection of the second support 44 to the second frame 20, so that the distance between the upper end of the second support frame 40 (the end connected to the first frame 10) and the lower end of the second support frame 40 (the end connected to the second frame 20) is reduced, so that the first frame 10 can be pivoted closer to the first support frame 30, more specifically so that the tubes on the first side of the first frame 10 can be pivoted closer to the tubes on the second side of the second frame 20. Then, in a second phase of folding the foldable bed frame from the unfolded state to the first folded state, the swivel and sliding connection of the second support 44 to the first frame 10 slides in a direction towards the swivel connection of the first support 43 to the first frame 10, and the swivel and sliding connection of the first support 43 to the second frame 20 slides in a direction towards the swivel connection of the second support 44 to the second frame 20, until the first frame 10 and the first support frame 30 tend to abut, so that the planes in which they lie tend to become parallel; at this point the support also tends to abut the second frame 20, so that the planes in which they lie tend to become parallel. In a variant of this embodiment, the first support 43 and the second support 44 each comprise a plurality of pivotally connected angled segments (not shown). The segments of the first support 43 and the second support 44 that cross each other are preferably also pivotally connected. The upper end of the first support 43 is pivotally connected to the first frame 10 and the lower end of the first support 43 is slidingly connected to the second frame 20, and the upper end of the second support 44 is slidingly connected to the first frame 10 and the lower end of the second support 44 is pivotally connected to the second frame 20. In a further variant, the second support frame 40 comprises a first support 43 and a second support 44 that are arranged between the first frame 10 and the second frame 20 and that exhibit a multi-segment structure (not shown). The upper ends of the first support 43 and the second support 44 are pivotally connected to a first connection location of the first frame 10, and the lower ends of the first support 43 and the second support 44 are pivotally connected to a second connection location of the second frame 20, which is located substantially directly below the first connection location. A straight line connecting the first connection location and the second connection location serves as a centre line about which the first support 43 and the second support 44 are arranged symmetrically. In particular, the first support 43 and the second support 44 each comprise a plurality of linear segments that are angled with respect to each other, for example two or more linear segments that are angled with respect to each other.For example, the first support 43 can include a first section, a second section, the first section and the second section being pivotally connected, the upper end of the first section being connected to the first connection position, and the lower end of the second section being connected to the second connection position; similarly, the second support 44 can include a third section, a fourth section, the third section and the fourth section being pivotally connected, the upper end of the third section being connected to the first connection position, and the lower end of the fourth section being connected to the second connection position.

[0076] Alternatively, the first support 43 can further include a first section, a second section, a third section, the first section and the second section being pivotally connected, the upper end of the first section being connected to the first connection position, and the lower end of the third section being connected to the second connection position; the second support 44 can include a fourth section, a fifth section, a sixth section, the fourth section and the fifth section being pivotally connected, the upper end of the fourth section being connected to the first connection position, and the lower end of the sixth section being connected to the second connection position. Preferably, the second section and the fifth section are pivotally connected. Understandably, the first support 43 and the second support 44 can further include more sections, the sections crossing between the first support 43 and the second support 44 being preferably pivotally connected. Thus, the above-described folding process of the present application can also be realized.

[0077] In order to further reduce the occupied area of the foldable bed frame after folding, in the fourth embodiment of the present application, the foldable bed frame is further provided with a plurality of folding portions. Referring to FIG. 10, for example, the two long sides of the first frame 10 are respectively provided with a first folding portion 70, and the two first folding portions 70 are respectively located near the midpoint of the long side, so that the two short sides of the first frame 10 can be substantially overlapped after folding. Similarly, the two long sides of the second frame 20 are respectively provided with a second folding portion 80, and the two folding portions are also respectively located near the midpoint of the long side, so that the two short sides of the second frame 20 are also substantially overlapped after folding. In this way, the occupied area of the foldable bed frame after folding is only about half of the occupied area in the unfolded state, greatly improving the portability and storage convenience of the foldable bed frame.

[0078] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0079] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A foldable bed frame, characterized by, The foldable bed frame comprises a first frame and a second frame arranged opposite in a height direction, and a support frame connected between the first frame and the second frame, one end of the support frame is rotationally connected with the first frame, and the other end is rotationally connected with the second frame, the support frame and the first frame and the second frame form a first side and a second side opposite in a first direction, the support frame comprises a first support frame located at the first side and a second support frame located at the second side, Wherein, the foldable bed frame has an unfolded state, and a first folding state and a second folding state, when the foldable bed frame is folded from the unfolded state to the first folding state, the first frame rotates relative to the first support frame in a first direction, and when the foldable bed frame is folded from the first folding state to the second folding state, the first support frame rotates relative to the second frame in the first direction.

2. The foldable bed frame of claim 1, wherein, The second support frame comprises a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are relatively pivotable to adjust the distance between the connection point of the second support frame and the first frame and the connection point of the second support frame and the second frame.

3. The foldable bed frame of claim 2, wherein, The first connecting rod and the second connecting rod are relatively pivotable along the plane where the second side is located.

4. The foldable bed frame of claim 2, wherein, The first connecting rod and the second connecting rod are relatively pivotable in a direction towards or away from the first support frame.

5. The foldable bed frame of claim 2, wherein, The first connecting rod and the second connecting rod are connected by a link, the link limits the direction of relative pivoting of the first connecting rod and the second connecting rod.

6. The foldable bed frame of claim 5, wherein, The link is provided with a U-shaped slot, each of the opposite first end and second end of the link is provided with a first opening and a second opening which are in communication with each other, the first connecting rod is hinged in the U-shaped slot through the first opening at the first end of the link, and the second connecting rod is hinged in the U-shaped slot through the first opening at the second end of the link, When the first connecting rod and the second connecting rod are relatively pivoted, the first connecting rod and the second connecting rod are respectively rotated between a state of passing through the first opening and a state of passing through the second opening.

7. The foldable bedstead of claim 6, wherein, The link is provided with a partition, the partition divides the U-shaped slot into a first sub-slot and a second sub-slot, the first opening and the second opening at the first end of the link are both in communication with the first sub-slot, the first connecting rod is hinged in the first sub-slot, and the first opening and the second opening at the second end of the link are both in communication with the second sub-slot, the second connecting rod is hinged in the second sub-slot.

8. The foldable bedstead according to claim 7, wherein The foldable bed frame is provided with two second support frames, the second openings of the two links of the two second support frames are directed in the same or opposite directions.

9. The foldable bed frame of claim 8, wherein, The second openings of the two links are both directed in a positive direction of a second direction or a negative direction of the second direction.

10. The foldable bed frame of claim 8, wherein, The second openings of the two links are arranged to be opposite or away from each other in a second direction.

11. The foldable bed frame of claim 1, wherein, The first frame comprises a first side frame and a second side frame, and a first support frame and a second support frame, the first support frame and the second support frame are respectively pivotally connected to one of the first side frame and the second side frame, and the first support frame and the second support frame are respectively pivotally connected to the other of the first side frame and the second side frame, The first side frame and the second side frame each comprise a third link and a fourth link, the third link and the fourth link are pivotally connected by a connecting piece, so that the third link and the fourth link can be pivoted relative to each other to adjust the distance between the connection point of the first frame and the first support frame and the connection point of the first frame and the second support frame.

12. The foldable bed frame of claim 11, wherein, The connecting piece is provided with a U-shaped slot, each of the opposite first end and second end of the connecting piece is provided with a first opening and a second opening which are in communication with each other, the third link is hinged in the U-shaped slot through the first opening at the first end of the connecting piece, and the fourth link is hinged in the U-shaped slot through the first opening at the second end of the connecting piece, When the third link and the fourth link are pivoted relative to each other, the third link and the fourth link are respectively rotated between a state of passing through the first opening and a state of passing through the second opening.

13. The foldable bed frame of claim 12, wherein, The second openings of the two connecting pieces of the first side frame and the second side frame each face a positive direction of a third direction or a negative direction of the third direction.

14. The foldable bed frame of claim 1, wherein, The second support frame comprises a support member which is obliquely arranged between the first frame and the second frame, one end of the support member is pivotally connected to one of the first frame and the second frame, and the other end of the support member is pivotally and slidingly connected to the other of the first frame and the second frame.

15. The foldable bed frame of claim 14, wherein, The support member comprises: a first support member, an upper end of the first support member is pivotally connected to the first frame, and a lower end of the first support member is pivotally and slidingly connected to the second frame; and a second support member, an upper end of the second support member is pivotally and slidingly connected to the first frame, and a lower end of the second support member is pivotally connected to the second frame, wherein the first support member and the second support member are arranged at one of the first side and the second side.

16. The foldable bed frame according to claim 15, wherein in a first stage of folding the foldable bed frame from the unfolded state to the first folded state, the pivotally and slidingly connected part of the second support member and the first frame slides towards a direction away from the pivotally connected part of the first support member and the first frame, and the pivotally and slidingly connected part of the first support member and the second frame slides towards a direction away from the pivotally connected part of the second support member and the second frame.

17. The foldable bed frame according to claim 15, wherein In a second stage of folding the foldable bedstead from the unfolded state to the first folded state, the rotating and sliding connection between the second support and the first frame slides towards the direction close to the rotating connection between the first support and the first frame, and the rotating and sliding connection between the first support and the second frame slides towards the direction close to the rotating connection between the second support and the second frame.

18. The foldable bed frame of claim 1, wherein, The second support frame comprises a first link and a second link, and the first link is telescopically connected with the second link.

19. The foldable bed frame of claim 1, wherein: Further comprising: a rotating connector, the rotating connector comprising: a sleeve, the first frame or the second frame passing through the sleeve, and the sleeve being rotatable relative to the first frame or the second frame passing therethrough around the axis of the sleeve itself; and a connecting portion, the connecting portion being connected to the substantially middle position of the sleeve, and the connecting portion being hinged to the first support frame or the second support frame.

20. The foldable bed frame of claim 1, wherein, The first frame is respectively provided with a first pair of folding portions on the opposite sides thereof, and the second frame is respectively provided with a second pair of folding portions on the corresponding opposite sides thereof, and when the foldable bedstead reaches the second folded state, the first frame can be folded through the first pair of folding portions, and the second frame can be folded through the second pair of folding portions.

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