Bed rail frames, bed rails and cribs

Abstract

The present application relates to the field of furniture technology, and in particular to a bed guardrail frame, a bed guardrail and a baby crib. The bed guardrail frame includes a left vertical bar and a right vertical bar that are relatively arranged, and a retractable and foldable upper crossbar and a lower crossbar are arranged between the left vertical bar and the right vertical bar. The upper crossbar and the lower crossbar can be respectively folded after shrinking along their length directions, and the left vertical bar and the right vertical bar are relatively close to each other; the bed guardrail and the baby crib use the bed guardrail frame. The bed guardrail frame, the bed guardrail and the baby crib provided by the present application, wherein the bed guardrail frame can achieve the effect of occupying less space by shrinking or folding, and the operation is simpler, and it is convenient to store and carry.

Description

[Technical field]

[0001] The present application relates to the field of furniture technology, and in particular to a bed guardrail frame, a bed guardrail and a baby crib. [Background technology]

[0002] In order to prevent people, especially young children, from falling off the bed during sleep, bed guardrails are usually set on one or both sides of the bed. Existing bed guardrails are composed of separate parts, which need to be spliced ​​when in use and need to be disassembled and stored separately when not in use, which is inconvenient for daily use and storage. [Summary of the invention]

[0003] The purpose of the present application is to provide a bed guardrail frame, a bed guardrail and a baby crib, wherein the bed guardrail frame can be retracted or folded to achieve the effect of occupying less space, and is simpler to operate and convenient to store and carry.

[0004] This application is implemented through the following technical solutions:

[0005] The bed guardrail frame includes a left vertical rod and a right vertical rod arranged opposite to each other, and a retractable and foldable upper cross bar and a lower cross bar are arranged between the left vertical rod and the right vertical rod. The upper cross bar and the lower cross bar can be respectively retracted and folded along their length directions, so that the left vertical rod and the right vertical rod are relatively close to each other.

[0006] As described above, the bed guardrail frame has an upper deployment locking mechanism on the upper cross bar for locking the upper cross bar in the deployed state, and a lower deployment locking mechanism on the lower cross bar for locking the lower cross bar in the deployed state. When the upper cross bar is retracted to a first preset position, the upper deployment locking mechanism is unlocked to achieve folding, and when the lower cross bar is retracted to a second preset position, the lower deployment locking mechanism is unlocked to achieve folding.

[0007] The bed guardrail frame as described above, wherein the upper cross bar comprises an upper cross bar 1 and an upper cross bar 2, wherein the first end of the upper cross bar 1 is hinged to the first end of the upper cross bar 2, the second end of the upper cross bar 1 is hinged to the left vertical bar, and the second end of the upper cross bar 2 is hinged to the right vertical bar;

[0008] The lower cross bar comprises a first lower cross bar and a second lower cross bar, the first end of the first lower cross bar is hinged to the first end of the second lower cross bar, the second end of the first lower cross bar is hinged to the left vertical bar, and the second end of the second lower cross bar is hinged to the right vertical bar.

[0009] The bed guardrail frame as described above, the first end of the upper horizontal rod and the first end of the upper horizontal rod are hingedly connected through a middle-upper hinge mechanism, the middle-upper hinge mechanism includes a first hinge joint and a second hinge joint hingedly connected at one end, the other end of the first hinge joint is connected to the upper horizontal rod, the other end of the second hinge joint is connected to the upper horizontal rod, and the first hinge joint is provided with a locking groove extending along the length direction of the upper horizontal rod;

[0010] The middle upper hinge mechanism also includes an upper unfolding locking mechanism for locking the first hinge joint and the second hinge joint so that the upper horizontal rod and the upper horizontal rod are in an unfolded state, the upper unfolding locking mechanism includes a first locking block and a locking protrusion arranged on the first locking block, one end of the first locking block extends into the second hinge joint along the direction of the upper horizontal rod, and the other end elastically extends out of the second hinge joint and is opposite to the upper horizontal rod, the locking protrusion extends into the locking groove and can slide along the locking groove;

[0011] By pressing the end of the first locking block opposite to the upper horizontal rod, the locking protrusion withdraws from the locking groove, and the upper unfolding locking mechanism is unlocked, so that the first hinged joint can rotate relative to the second hinged joint.

[0012] In the bed guardrail frame as described above, the upper cross bar comprises a left upper cross bar and a middle upper cross bar, the left upper cross bar is telescopically nested in the middle upper cross bar, and when the left upper cross bar is contracted to press against the first locking block, the upper deployment locking mechanism is triggered to unlock.

[0013] The bed guardrail frame as described above, the first end of the lower cross bar 1 and the first end of the lower cross bar 2 are hinged through a middle-lower hinge mechanism, and the middle-lower hinge mechanism includes: a hinge connection block, a third hinge, a fourth hinge, and a lower unfolding locking mechanism;

[0014] One end of the hinged joint connecting block is hinged to the third hinged joint, and the other end is hinged to the fourth hinged joint. A first slideway is provided through the third hinged joint, and a second slideway corresponding to the first slideway is provided through the fourth hinged joint.

[0015] The lower deployment locking mechanism is used to lock the third hinge joint and the fourth hinge joint so that the lower horizontal rod 1 and the lower horizontal rod 2 are in an deployed state, and the lower deployment locking mechanism includes a first top piece slidably arranged in the first slideway and a second top piece slidably arranged in the second slideway, and the second top piece can extend into the first slideway to lock the third hinge joint and the fourth hinge joint;

[0016] The first top piece is pressed to make the second top piece withdraw from the first slideway, and the lower deployment locking mechanism is unlocked, so that the third hinge joint and the fourth hinge joint can both rotate relative to the hinge joint connecting block.

[0017] In the bed guardrail frame as described above, the lower cross bar includes a left lower cross bar and a left middle cross bar, the left lower cross bar is telescopically nested in the left middle cross bar, and when the left lower cross bar is contracted to press against the first top piece, the lower deployment locking mechanism is triggered to unlock.

[0018] The bed guardrail frame as described above, wherein the second end of the first upper horizontal rod is hinged to the left vertical rod through an upper left hinge mechanism, and the second end of the second upper horizontal rod is hinged to the right vertical rod through an upper right hinge mechanism;

[0019] The upper left hinge mechanism comprises an upper left slide seat which is sleeved on the left vertical rod and can slide up and down along the left vertical rod, an upper left lock hole is provided on the upper left slide seat, an upper left elastic protrusion which can be inserted into the upper left lock hole to lock the upper left slide seat is provided at the upper end of the left vertical rod, and an upper left button which is used to press the upper left elastic protrusion so that the upper left slide seat can slide up and down along the left vertical rod is also provided in the upper left lock hole;

[0020] The upper right hinge mechanism comprises an upper right slide seat which is sleeved on the right vertical rod and can slide up and down along the right vertical rod.

[0021] The present application also provides a bed guardrail, comprising the bed guardrail frame as described above, wherein a flexible cloth is provided between the frame formed by the left vertical rod, the right vertical rod, the upper horizontal rod and the lower horizontal rod.

[0022] The present application also provides a baby crib, comprising a bed body and the bed guardrail as described above, wherein the bed guardrail is arranged on one side of the bed body.

[0023] Compared with the prior art, this application has the following advantages:

[0024] 1. The bed guardrail frame provided in the present application, as well as the bed guardrail and crib using the bed guardrail frame, wherein the bed guardrail frame can be retracted or folded to achieve the effect of occupying less space, and is easier to operate, and is convenient for storage and carrying.

[0025] 2. The upper left hinge mechanism and the upper right hinge mechanism can slide to the bottom while being folded through the hinge structure, which effectively reduces the space occupied by the upper cross bar after folding, and further makes the folded structure more compact.

[0026] 3. The present application can also unlock the folding function through telescopic action linkage, which is more ingenious to operate and can also achieve the effect of occupying less space after folding.

Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic structural diagram of the bed guardrail frame in the expanded state according to Example 1 of the present application.

[0029] Figure 2 This is a schematic diagram of the exploded structure of the bed guardrail frame described in Example 1 of the present application.

[0030] Figure 3 For Example 1 of this application Figure 2 Enlarged view of part A in the middle.

[0031] Figure 4 For Example 1 of this application Figure 2 Enlarged view of part B in the middle.

[0032] Figure 5 For Example 1 of this application Figure 2 Enlarged view of part C in the middle.

[0033] Figure 6 For Example 1 of this application Figure 2 Enlarged view of part D in the middle.

[0034] Figure 7 For Example 1 of this application Figure 2 Enlarged view of middle part E.

[0035] Figure 8 This is a schematic diagram of the structure of the first hinge joint in Example 1 of the present application.

[0036] Fig. 9 This is a schematic structural diagram of the middle and upper hinge mechanism described in Example 1 of the present application.

[0037] Fig.10 This is a schematic diagram of the structure of the middle and lower hinge mechanism described in Example 1 of the present application.

[0038] Fig.11 This is a front view of the bed guardrail frame in the folded state according to Example 1 of the present application.

[0039] Fig.12 This is a left view of the bed guardrail frame in the folded state according to Example 1 of the present application. [Specific implementation method]

[0040] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] Example 1

[0042] like Figures 1 to 12 As shown, an embodiment of the present application proposes a bed guardrail frame, including a left vertical rod 1 and a right vertical rod 2 arranged relatively to each other, and a retractable and foldable upper cross bar 3 and a lower cross bar 4 are provided between the left vertical rod 1 and the right vertical rod 2. The upper cross bar 3 and the lower cross bar 4 can be respectively contracted and folded along their length directions, and the left vertical rod 1 and the right vertical rod 2 are relatively close to each other.

[0043] When the bed guardrail frame is in use, the upper crossbar 3 and the lower crossbar 4 can be respectively unfolded and extended to form a guardrail shape and installed on the side of the bed, and when it is stored, the upper crossbar 3 and the lower crossbar 4 are contracted and folded. The operation is simple and quick, and the folded state occupies a small space, which is convenient for storage and carrying.

[0044] The folding function of the present embodiment is realized by an articulated joint, and the structure is simple and easy to operate. Specifically, the upper horizontal bar 3 includes an upper horizontal bar 1 31 and an upper horizontal bar 2 32, the first end of the upper horizontal bar 1 31 is hinged to the first end of the upper horizontal bar 2 32, the second end of the upper horizontal bar 1 31 is hinged to the left vertical bar 1, and the second end of the upper horizontal bar 2 32 is hinged to the right vertical bar 2.

[0045] The lower crossbar 4 includes a lower crossbar 1 41 and a lower crossbar 2 42. The first end of the lower crossbar 41 is hinged to the first end of the lower crossbar 2 42. The second end of the lower crossbar 41 is hinged to the left vertical bar 1, and the second end of the lower crossbar 2 42 is hinged to the right vertical bar 2. The second end of the lower crossbar 41 is hinged to the left vertical bar 1 through a lower left hinge mechanism 9, and the second end of the lower crossbar 2 42 is hinged to the right vertical bar 2 through a lower right hinge mechanism 10. The lower left hinge mechanism 9 includes a lower left hinge seat, one end of which is fixedly connected to the lower end of the left vertical bar 1, and the other end is hinged to the lower crossbar 1 41. The lower right hinge mechanism 10 includes a lower right hinge seat, one end of which is fixedly connected to the lower end of the right vertical bar 2, and the other end is hinged to the lower crossbar 2 42.

[0046] Furthermore, the first end of the upper horizontal rod 31 and the first end of the upper horizontal rod 32 are hinged through a middle-upper hinge mechanism 5, and the middle-upper hinge mechanism 5 includes a first hinge joint 51 and a second hinge joint 52 hinged at one end, the other end of the first hinge joint 51 is connected to the upper horizontal rod 31, and the other end of the second hinge joint 52 is connected to the upper horizontal rod 32, and the first hinge joint 51 is provided with a locking groove 511 extending along the length direction of the upper horizontal rod 31.

[0047] The middle upper hinge mechanism 5 also includes an upper unfolding locking mechanism 53 for locking the first hinge joint 51 and the second hinge joint 52 so that the upper horizontal rod 31 and the upper horizontal rod 32 are in an unfolded state. The upper unfolding locking mechanism 53 includes a first locking block 531 and a locking protrusion 532 provided on the first locking block 531. One end of the first locking block 531 extends into the second hinge joint 52 along the direction of the upper horizontal rod 32, and the other end elastically extends out of the second hinge joint 52 and faces the upper horizontal rod 31. The locking protrusion 532 extends into the locking groove 511 and can slide along the locking groove 511.

[0048] After the locking projection 532 extends into the locking groove 511, the rotation between the first hinge joint 51 and the second hinge joint 52 can be limited. In addition, a first elastic reset member is provided between the first locking block 531 and the upper two horizontal rods 32, which is used to push the first locking block 531 into the second hinge joint 52.

[0049] By pressing the end of the first locking block 531 opposite to the upper horizontal rod 31 , the locking protrusion 532 withdraws from the locking groove 511 , and the upper unfolding locking mechanism 53 is unlocked, so that the first hinged joint 51 can rotate relative to the second hinged joint 52 .

[0050] Furthermore, the first end of the lower horizontal rod 1 41 and the first end of the lower horizontal rod 2 42 are hinged through a middle and lower hinge mechanism 8 , and the middle and lower hinge mechanism 8 includes: a hinge connection block 81 , a third hinge 82 , a fourth hinge 83 , and a lower unfolding locking mechanism 84 .

[0051] One end of the hinged joint connecting block 81 is hinged to the third hinged joint 82 , and the other end is hinged to the fourth hinged joint 83 . A first slideway 821 runs through the third hinged joint 82 , and a second slideway 831 corresponding to the first slideway 821 runs through the fourth hinged joint 83 .

[0052] The lower unfolding locking mechanism 84 is used to lock the third hinge joint 82 and the fourth hinge joint 83 so that the lower horizontal rod 1 41 and the lower horizontal rod 2 42 are in the unfolded state. The lower unfolding locking mechanism 84 includes a first top piece 841 slidably arranged in the first slide 821 and a second top piece 842 slidably arranged in the second slide 831. The second top piece 842 can extend into the first slide 821 to lock the third hinge joint 82 and the fourth hinge joint 83. Among them, a second elastic reset piece for pushing the first top piece 841 toward one end away from the second top piece 842 is provided between the first top piece 841 and the lower horizontal rod 1 41, and a third elastic reset piece for pushing the second top piece 842 into the first slide 821 is provided between the second top piece 842 and the lower horizontal rod 2 42. In this embodiment, the first elastic reset piece, the second elastic reset piece, and the third elastic reset piece are all springs.

[0053] The first top piece 841 is pressed to make the second top piece 842 withdraw from the first slideway 821 , and the lower deployment locking mechanism 84 is unlocked, so that the third hinged joint 82 and the fourth hinged joint 83 can both rotate relative to the hinged joint connecting block 81 .

[0054] In order to make the overall structure more compact after folding, the middle and lower hinged mechanism 8 in this embodiment does not directly hinge the ends of the lower horizontal rod 1 41 and the lower horizontal rod 2 42, but indirectly hinges them through the hinge joint connecting block 81. It should be noted that there is another implementation method in which both the middle and upper hinged mechanism 5 and the middle and lower hinged mechanism 8 adopt this indirect hinge method, which can also achieve a more compact effect after folding.

[0055] The present embodiment realizes telescopic movement through the following scheme: the upper crossbar 31 comprises a left upper crossbar 311 and a middle upper crossbar 312, wherein the left upper crossbar 311 is telescopically nested in the middle upper crossbar 312; the lower crossbar 41 comprises a left lower crossbar 411 and a left middle crossbar 412, wherein the left lower crossbar 411 is telescopically nested in the left middle crossbar 412. In order to lock the elongated state of the left upper crossbar 311 and the middle upper crossbar 312, the middle upper crossbar 312 is provided with a telescopic locking hole, and the left upper crossbar 311 is provided with an elastic telescopic locking protrusion 3110 protruding radially. When the left upper crossbar 311 is elongated to the longest, the elastic telescopic locking protrusion 3110 extends into the telescopic locking hole under the action of elastic force, thereby locking the elongated state. When shrinking, the elastic telescopic locking protrusion 3110 only needs to be pushed out of the telescopic locking hole to realize shrinkage.

[0056] Furthermore, the second end of the upper horizontal rod 1 31 is hinged to the left vertical rod 1 through an upper left hinge mechanism 6 , and the second end of the upper horizontal rod 2 32 is hinged to the right vertical rod 2 through an upper right hinge mechanism 7 .

[0057] The upper left hinge mechanism 6 includes an upper left slide 61 which is sleeved on the left vertical rod 1 and can slide up and down along the left vertical rod 1. The upper left slide 61 is provided with an upper left locking hole 611. The upper end of the left vertical rod 1 is provided with an upper left elastic protrusion 62 which can extend into the upper left locking hole 611 to lock the upper left slide 61. The upper left locking hole 611 is also provided with an upper left button 63 for pressing the upper left elastic protrusion 62 so that the upper left slide 61 can slide up and down along the left vertical rod 1.

[0058] The upper right hinge mechanism 7 comprises an upper right slide 71 which is sleeved on the right vertical rod 2 and can slide up and down along the right vertical rod 2. An upper right lock hole 711 is provided on the upper right slide 71, and an upper right elastic protrusion 72 which can be inserted into the upper right lock hole 711 to lock the upper right slide 71 is provided at the upper end of the right vertical rod 2. An upper right button 73 which is used to press the upper right elastic protrusion 72 so that the upper right slide 71 can slide up and down along the right vertical rod 2 is also provided in the upper right lock hole 711.

[0059] The upper left hinge mechanism 6 and the upper right hinge mechanism 7 can be folded by the hinge structure and can slide to the bottom, which effectively reduces the space occupied by the folded upper cross bar 3 and further facilitates storage and carrying.

[0060] More preferably, the upper cross bar 3 and the lower cross bar 4 also adopt a staggered design, that is, the folding plane of the lower cross bar 4 is staggered with the upper cross bar 3, so that the folded upper cross bar 3 can slide further downward, the folding structure is more compact, and the overall occupied volume is further compressed.

[0061] This embodiment also provides a bed guardrail and a baby crib, wherein the bed guardrail comprises the bed guardrail frame as described above, and a flexible cloth is arranged between the frame formed by the left vertical rod 1, the right vertical rod 2, the upper cross bar 3 and the lower cross bar 4. The baby crib comprises a bed body and the bed guardrail as described above, wherein the bed guardrail is arranged on one side of the bed body. The lower ends of the left vertical rod 1 and the right vertical rod 2 of the bed guardrail are respectively provided with pins 120 extending perpendicularly to the length direction of the two vertical rods to be mounted on the bed body.

[0062] The folding process of this embodiment is as follows: first, the left upper crossbar 311 is retracted into the middle upper crossbar 312, and the left lower crossbar 411 is retracted into the left middle crossbar 412. At this time, the left vertical bar 1 and the right vertical bar 2 are relatively close to each other. At this time, the upper unfolding locking mechanism 53 and the lower unfolding locking mechanism 84 are unlocked, so that the upper horizontal bar 31 and the upper horizontal bar 32 are swing-folded, and the lower horizontal bar 41 and the lower horizontal bar 42 are swing-folded, and then the folded upper horizontal bar 31 and the upper horizontal bar 32 slide along the left vertical bar 1 and the right vertical bar 2 to complete the folding. Similarly, the reverse operation can realize the unfolding of the bed guardrail.

[0063] Example 2

[0064] In Example 2, this embodiment is basically the same as Example 1. For the sake of simplicity, only the main structure differences from Example 1 are described. The parts not described in this embodiment are the same as those in Example 1, and the difference is that the telescopic structure and folding structure of this embodiment are linkage structures, the upper cross bar 3 is provided with an upper unfolding locking mechanism 53 for locking the upper cross bar 3 in the unfolded state, and the lower cross bar 4 is provided with a lower unfolding locking mechanism 84 for locking the lower cross bar 4 in the unfolded state. When the upper cross bar 3 is retracted to the first preset position, the upper unfolding locking mechanism 53 is triggered to unlock to achieve folding, and when the lower cross bar 4 is retracted to the second preset position, the lower unfolding locking mechanism 84 is triggered to unlock to achieve folding.

[0065] Correspondingly, when the left upper cross bar 311 contracts to press the first locking block 531, the upper deployment locking mechanism 53 is unlocked. When the left lower cross bar 411 contracts to press the first top piece 841, the lower deployment locking mechanism 84 is unlocked.

[0066] The bed guardrail frame in this embodiment unlocks the folding function through a telescopic action, which is more ingenious to operate and can also achieve the effect of occupying less space after being folded.

[0067] Example 3

[0068] In Example 3, this embodiment is basically the same as Example 1 or 2. For the sake of simplicity, only the main structure that is different from Example 1 or 2 is described. The parts not described in this embodiment are the same as those in Example 1 or 2, and the difference is that the upper crossbar 3 and the lower crossbar 4 in this embodiment cancel the telescopic structure of the upper crossbar 31 and the lower crossbar 41, and the upper crossbar 3 and the lower crossbar 4 only have a folding structure. Further elaboration is: This embodiment provides a foldable bed guardrail frame, which includes a left vertical bar 1 and a right vertical bar 2 that are relatively arranged, and a foldable upper crossbar 3 and a lower crossbar 4 are provided between the left vertical bar 1 and the right vertical bar 2. When the upper crossbar 3 and the lower crossbar 4 are folded, the left vertical bar 1 and the right vertical bar 2 are relatively close to each other.

[0069] The bed guardrail frame of this embodiment has a small volume after being folded, and is convenient for storage. It is particularly suitable for a structure in which the upper horizontal rod 31 and the lower horizontal rod 41 each have only two folding rods of similar length.

[0070] In summary, this application has but is not limited to the following beneficial effects:

[0071] 1. The bed guardrail frame provided in the present application, as well as the bed guardrail and crib using the bed guardrail frame, wherein the bed guardrail frame can be retracted or folded to achieve the effect of occupying less space, and is easier to operate, and is convenient for storage and carrying.

[0072] 2. The upper left hinge mechanism 6 and the upper right hinge mechanism 7 can slide to the bottom while being folded through the hinge structure, which effectively reduces the space occupied by the upper cross bar 3 after folding, and further makes the folded structure more compact.

[0073] 3. The present application can also unlock the folding function through telescopic action linkage, which is more ingenious to operate and can also achieve the effect of occupying less space after folding.

[0074] It should be understood that the terms "first", "second", etc. are used in this application to describe various information, but this information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0075] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of this application is not limited to these descriptions. Any similarity or similarity with the method, structure, etc. of this application, or some technical deductions or replacements made based on the concept of this application should be considered as the protection scope of this application.

Claims

1. Bed guardrail frame, characterized in that: The invention comprises a left vertical rod (1) and a right vertical rod (2) which are arranged opposite to each other, wherein a retractable and foldable upper cross rod (3) and a lower cross rod (4) are arranged between the left vertical rod (1) and the right vertical rod (2), and the upper cross rod (3) and the lower cross rod (4) can be respectively retracted and folded along their length directions, so that the left vertical rod (1) and the right vertical rod (2) are relatively close to each other and folded; The two ends of the upper cross bar (3) are respectively hinged to the left vertical bar (1) and the right vertical bar (2); the two ends of the lower cross bar (4) are respectively hinged to the left vertical bar (1) and the right vertical bar (2); The upper cross bar (3) is provided with an upper unfolding locking mechanism (53) for locking the upper cross bar (3) in an unfolded state, and the lower cross bar (4) is provided with a lower unfolding locking mechanism (84) for locking the lower cross bar (4) in an unfolded state; when the upper cross bar (3) is retracted to a first preset position, the upper unfolding locking mechanism (53) is triggered to be unlocked to achieve folding; when the lower cross bar (4) is retracted to a second preset position, the lower unfolding locking mechanism (84) is triggered to be unlocked to achieve folding.

2. The bed guardrail frame according to claim 1, characterized in that: The upper cross bar (3) comprises an upper cross bar (1) and an upper cross bar (2) (32), wherein the first end of the upper cross bar (31) is hinged to the first end of the upper cross bar (32), the second end of the upper cross bar (31) is hinged to the left vertical bar (1), and the second end of the upper cross bar (32) is hinged to the right vertical bar (2); The lower cross bar (4) comprises a first lower cross bar (41) and a second lower cross bar (42), wherein a first end of the first lower cross bar (41) and a first end of the second lower cross bar (42) are hingedly connected, a second end of the first lower cross bar (41) is hingedly connected to the left vertical bar (1), and a second end of the second lower cross bar (42) is hingedly connected to the right vertical bar (2).

3. The bed guardrail frame according to claim 2, characterized in that: The first end of the upper horizontal rod (31) and the first end of the upper horizontal rod (32) are hingedly connected via a middle-upper hinge mechanism (5); the middle-upper hinge mechanism (5) comprises a first hinge joint (51) and a second hinge joint (52) hingedly connected at one end; the other end of the first hinge joint (51) is connected to the upper horizontal rod (31); the other end of the second hinge joint (52) is connected to the upper horizontal rod (32); a locking groove (511) extending along the length direction of the upper horizontal rod (31) is provided in the first hinge joint (51); The middle-upper hinge mechanism (5) further comprises an upper unfolding locking mechanism (53) for locking the first hinge joint (51) and the second hinge joint (52) so that the upper horizontal rod (31) and the upper horizontal rod (32) are in an unfolded state, the upper unfolding locking mechanism (53) comprising a first locking block (531) and a locking protrusion (532) provided on the first locking block (531), one end of the first locking block (531) extending into the second hinge joint (52) along the direction of the upper horizontal rod (32), and the other end elastically extending out of the second hinge joint (52) and facing the upper horizontal rod (31), the locking protrusion (532) extending into the locking groove (511) and being able to slide along the locking groove (511); By pressing the end of the first locking block (531) opposite to the upper horizontal rod (31), the locking protrusion (532) withdraws from the locking groove (511), and the upper unfolding locking mechanism (53) is unlocked, so that the first hinged joint (51) can rotate relative to the second hinged joint (52).

4. The bed guardrail frame according to claim 3, characterized in that: The upper cross bar (31) comprises a left upper cross bar (311) and a middle upper cross bar (312); the left upper cross bar (311) is telescopically nested in the middle upper cross bar (312); when the left upper cross bar (311) is contracted to press against the first locking block (531), the upper deployment locking mechanism (53) is triggered to unlock.

5. The bed guardrail frame according to claim 2, characterized in that: The first end of the first lower cross bar (41) and the first end of the second lower cross bar (42) are hingedly connected via a middle-lower hinge mechanism (8), wherein the middle-lower hinge mechanism (8) comprises: a hinge connection block (81), a third hinge (82), a fourth hinge (83), and a lower deployment locking mechanism (84); One end of the hinged joint connecting block (81) is hinged to the third hinged joint (82), and the other end is hinged to the fourth hinged joint (83); a first slideway (821) is provided through the third hinged joint (82), and a second slideway (831) corresponding to the first slideway (821) is provided through the fourth hinged joint (83); The lower unfolding locking mechanism (84) is used to lock the third hinge joint (82) and the fourth hinge joint (83) so that the lower horizontal rod (41) and the lower horizontal rod (42) are in an unfolded state, and the lower unfolding locking mechanism (84) comprises a first top member (841) slidably arranged in the first slideway (821) and a second top member (842) slidably arranged in the second slideway (831), and the second top member (842) can extend into the first slideway (821) to lock the third hinge joint (82) and the fourth hinge joint (83); The first top piece (841) is pressed to cause the second top piece (842) to withdraw from the first slideway (821), and the lower deployment locking mechanism (84) is unlocked, so that the third hinged joint (82) and the fourth hinged joint (83) can both rotate relative to the hinged joint connecting block (81).

6. The bed guardrail frame according to claim 5, characterized in that: The lower cross bar (41) comprises a left lower cross bar (411) and a left middle cross bar (412); the left lower cross bar (411) is telescopically nested in the left middle cross bar (412); when the left lower cross bar (411) contracts to press against the first top piece (841), the lower deployment locking mechanism (84) is triggered to unlock.

7. The bed guardrail frame according to claim 2, characterized in that: The second end of the upper horizontal rod (31) is hinged to the left vertical rod (1) via an upper left hinge mechanism (6), and the second end of the upper horizontal rod (32) is hinged to the right vertical rod (2) via an upper right hinge mechanism (7); The upper left hinge mechanism (6) comprises an upper left slide (61) which is sleeved on the left vertical rod (1) and can slide up and down along the left vertical rod (1); an upper left locking hole (611) is provided on the upper left slide (61); an upper left elastic protrusion (62) which can be inserted into the upper left locking hole (611) to lock the upper left slide (61) is provided at the upper end of the left vertical rod (1); and an upper left button (63) which is used to press the upper left elastic protrusion (62) so that the upper left slide (61) can slide up and down along the left vertical rod (1) is also provided in the upper left locking hole (611); The upper right hinge mechanism (7) comprises an upper right sliding seat (71) which is sleeved on the right vertical rod (2) and can slide up and down along the right vertical rod (2).

8. Bed guardrail, characterized in that: It comprises a bed guardrail frame as claimed in any one of claims 1 to 7, wherein a flexible cloth is arranged between the frame formed by a left vertical rod (1), a right vertical rod (2), an upper cross rod (3) and a lower cross rod (4).

9. A baby bed, comprising a bed body, characterized in that: It also includes the bed guardrail as described in claim 8, wherein the bed guardrail is arranged on one side of the bed body.

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