Bed guardrail stable in folding

Abstract

The utility model provides a stably folded bed guardrail which comprises a supporting mechanism and a fence mechanism arranged on the supporting mechanism, and the supporting mechanism comprises at least two supporting rods and a U-shaped extension rod connected with the two supporting rods. The fence mechanism comprises at least two fence rod assemblies, two cross rods connected between the two fence rod assemblies, a first locking assembly and a second locking assembly, the first locking assembly can unlock the hinge mechanism, and when the second locking assembly moves in the direction away from the first locking assembly, the hinge mechanism is locked by the first locking assembly. The first locking assembly can be unlocked so that the first locking assembly can move downwards and unlock the hinge mechanism, the design of the first locking assembly and the second locking assembly is adopted, the situation that the bed guardrail is accidentally opened due to the fact that an unlocking switch is mistakenly touched can be effectively prevented, the safety of the bed guardrail is improved, and the use safety of a user is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of bed guardrails, and in particular to a foldable and stable bed guardrail. Background Art

[0002] In the existing bed guardrail structure, the folding function has a big stability problem. Due to unreasonable design or imprecise manufacturing process, the folding parts are prone to loosening or deformation, causing the guardrail to shake or tilt during use, affecting its stability and reliability. In addition, the unlocking switch of the existing bed guardrail is relatively simple in design and is easily touched by mistake or operated carelessly, resulting in accidental unlocking of the bed guardrail, endangering the safety of the user. This safety hazard seriously affects the safety performance of the bed guardrail and is prone to accidental injuries.

[0003] In addition, the locking structure of existing bed guardrails is single, usually adopting a simple buckle or locking pin design, lacking multiple protection mechanisms, and prone to single point failures, which affects the overall safety of the bed guardrails. When dealing with different usage scenarios and needs, the locking structure of existing bed guardrails cannot provide sufficient flexibility and diversity, and cannot meet the personalized needs of users.

[0004] Therefore, in order to address the problems of stability, accidental unlocking and single locking structure in the existing bed guardrail structure, it is necessary to improve the safety performance and stability of the bed guardrail through innovative design and technological improvements to ensure that users can get safer and more reliable protection and support when using the bed guardrail. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the present application provides a foldable and stable bed guardrail with a double locking structure and anti-accidental touch.

[0006] A foldable and stable bed guardrail comprises a support mechanism and an enclosure mechanism arranged on the support mechanism, wherein the support mechanism comprises at least two support rods and a U-shaped extension rod connected to the two support rods, the enclosure mechanism comprises at least two enclosure rod assemblies and two cross bars connected between the two enclosure rod assemblies, and the enclosure rod assembly comprises:

[0007] A sleeve, which is sleeved on the support rod, and the support rod can move along the length direction of the sleeve;

[0008] A U-shaped gear lever, both ends of which are hinged to one side of the sleeve through a hinge mechanism, and the U-shaped gear lever can be rotated toward the cross bar through the hinge mechanism and can be in an unfolded state, a folded state, and a folding transition state relative to the cross bar;

[0009] An articulated mechanism, which is sleeved on the upper and lower ends of the sleeve and can be hinged to the U-shaped gear lever, the articulated mechanism comprises an articulated seat that can be sleeved on the sleeve and an articulated sleeve hinged on the articulated seat, and the articulated sleeve is used to be sleeved on the two end positions of the U-shaped gear lever;

[0010] A first locking assembly is disposed on the hinge seat and is engaged with the hinge sleeve. The first locking assembly can lock and unlock the U-shaped lever to keep the U-shaped lever in an unfolded state, a folded state, and a folding transition state. When the first locking assembly moves downward, the first locking assembly unlocks the hinge mechanism, and the U-shaped lever can rotate around the hinge with the hinge mechanism;

[0011] The second locking component is placed on the top of the lower end of the first locking component and is used to lock and unlock the first locking component. When the second locking component moves in a direction away from the first locking component, the first locking component can be unlocked to allow the first locking component to move downward.

[0012] As described above, the foldable and stable bed guardrail, the first locking assembly includes a locking block with one end placed on the hinge seat and the other end insertable in the hinge sleeve, a first elastic member placed on the lower end of the locking block and located in the hinge sleeve, and a hinge shaft passed through the hinge seat and capable of being mounted on the hinge sleeve, the hinge seat is provided with a locking opening at the upper end corresponding to the locking block, the first elastic member can place the locking block on the locking opening to lock the hinge sleeve, the hinge sleeve is provided with a receiving opening at the lower end corresponding to the locking block, and the hinge sleeve can be unlocked when the locking block moves toward the receiving opening.

[0013] As described above, the foldable and stable bed guardrail, the hinge sleeve includes a hinge portion that can be hinged on the hinge seat and a first connecting portion that is integrally arranged with the hinge portion and is used to connect to the U-shaped gear lever, an isolation plate is provided in the hinge portion, and the accommodating openings are provided with at least two, which are symmetrical and spaced apart on the circumference of the isolation plate, at least two first plug-in blocks are provided at the lower end of the locking block corresponding to the accommodating openings, at least two second plug-in blocks are provided at the upper end of the locking block, and the hinge seat is provided with at least two locking openings corresponding to the second plug-in blocks.

[0014] As described above, the foldable and stable bed guardrail has a first limit block on the lower side of the isolation plate, and the hinge seat has a second limit block corresponding to the first limit block for limiting the first limit block. When the U-shaped gear lever is in an unfolded state, the front end of the second limit block abuts against the rear end of the first limit block, and when the U-shaped gear lever is in a folded state, the rear end of the second limit block abuts against the front end of the first limit block.

[0015] As for the foldable and stable bed guardrail as described above, the first locking assembly also includes a first button part inserted through the hinge seat, one end of the first button part is located outside the hinge seat, and the other end abuts against the locking block, and a button hole corresponding to the first button part is provided on the hinge seat for inserting the first button part, and a button cover plate for fixing the first button part in the button hole is provided on the hinge seat upper cover, and a button pin is provided on the lower side of the first button part, one end of the button pin abuts against the first button part and the other end is on the hinge mechanism located at the lower end of the sleeve, and when the first button part is pressed downward, the locking block and the button pin can be pushed downward respectively to unlock the hinge mechanisms located at the upper and lower ends of the sleeve.

[0016] The foldable and stable bed guardrail as described above, wherein the second locking assembly comprises:

[0017] A sliding lock, which is embedded in one side of the hinge sleeve and placed on the lower end of the first locking component, and can move relative to the first locking component toward or away from the first locking component. When the sliding lock is away from the lower end of the first locking component, the first locking component can unlock the hinge mechanism;

[0018] A second elastic member, which is disposed on a side of the sliding lock away from the first locking assembly and is used to reset the sliding lock;

[0019] A limiting member is inserted between the hinge sleeve and the sliding lock. The sliding lock is provided with a limiting groove corresponding to the limiting member. When the sliding lock moves away from the first locking component, the limiting groove can move relative to the limiting member.

[0020] As described above, the foldable and stable bed guardrail, the sliding lock includes a top portion embedded in the hinge sleeve and a second button portion located on the outside of the hinge sleeve, one side of the hinge sleeve is provided with a groove inwardly for the sliding lock to be embedded, the top portion can pass through the groove and abut against the lower end of the first locking component, and the upper and lower sides of the groove are also provided with through holes corresponding to the limiting member for the limiting member to pass through, one end of the second elastic member abuts against the sliding lock, and the other end abuts against the groove, when the sliding lock unlocks the first locking component, the second elastic member can reset the sliding lock.

[0021] The foldable and stable bed guardrail as described above further comprises a second lifting assembly arranged on the hinge mechanism, the hinge mechanism is provided with a third locking groove, the second lifting assembly comprises a fourth locking piece embedded in the third locking groove and a third elastic piece arranged in the third locking groove and placed on the fourth locking piece, and a positioning clamp is further provided at one end of the fourth locking piece away from the third elastic piece;

[0022] The hinge mechanism is provided with a sleeve opening for inserting the sleeve, and the inner wall of the sleeve opening is provided with a third pin hole, and the positioning clamp can pass through the third pin hole and be clamped on the support rod to position the support rod, and when the fourth locking member moves in a direction away from the sleeve opening, the positioning clamp can unlock the support rod;

[0023] A plurality of positioning holes are provided on one side of the support rod corresponding to the third pin hole, and the positioning clamp can be passed through the positioning holes to position the support rod.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present application provides a foldable and stable bed guardrail. Through the design of a supporting mechanism and a surrounding mechanism, the bed guardrail is more stable and reliable during use, avoiding shaking or tilting, and improving the overall safety of use. The design of a first locking component and a second locking component can effectively prevent the bed guardrail from accidentally opening due to accidentally touching the unlocking switch, thereby increasing the safety of the bed guardrail and ensuring the safety of user use. The design of the surrounding rod assembly enables the bed guardrail to be easily converted from an expanded state to a folded state or a folded transition state, thereby improving the flexibility and convenience of the bed guardrail and facilitating users to adjust and store it according to their needs. Through the design of the hinge mechanism and the locking component, the stable folding function of the bed guardrail is realized, while ensuring the safe switching of the guardrail between the expanded state, the folded state and the folded transition state, providing users with a more convenient and safe use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for describing the embodiments are briefly introduced below.

[0027] Figure 1 It is a three-dimensional schematic diagram of a foldable and stable bed guardrail of the present application in an unfolded state C;

[0028] Figure 2 This is a schematic diagram of a folded state D of a foldable and stable bed guardrail of the present application;

[0029] Figure 3 This is a schematic diagram of a folding transition state E of a foldable and stable bed guardrail of the present application;

[0030] Figure 4 is an exploded view of a foldable and stable bed guardrail of the present application;

[0031] Figure 5 This is a schematic diagram of the use state of the first lifting assembly of a foldable and stable bed guardrail of the present application;

[0032] Figure 6It is an exploded schematic diagram of a hinge mechanism of a foldable and stable bed guardrail of the present application;

[0033] Figure 7 This is a schematic diagram of an exploded view of a hinge mechanism of a foldable and stable bed guardrail of the present application from another perspective;

[0034] Figure 8 It is an exploded schematic diagram of a second lifting assembly of a foldable and stable bed guardrail of the present application;

[0035] Fig. 9 It is a cross-sectional view of a hinged mechanism of a foldable and stable bed guardrail of the present application in a locked state;

[0036] Fig.10 It is a cross-sectional view of an unlocked state of a hinge mechanism of a foldable and stable bed guardrail of the present application;

[0037] Fig.11 It is a cross-sectional view of a second lifting assembly of a foldable and stable bed guardrail of the present application. DETAILED DESCRIPTION

[0038] The utility model is further described below in conjunction with the accompanying drawings:

[0039] like Figure 1-11 As shown, a foldable and stable bed guardrail includes a supporting mechanism A, a surrounding mechanism B, a supporting rod 1, a U-shaped extension rod 2, a surrounding rod assembly 3, a cross bar 4, a sleeve 30, a U-shaped stop rod 31, an articulated mechanism 32, an articulated seat 320, an articulated sleeve 321, a receiving opening 3211, and a locking opening 3201.

[0040] A foldable and stable bed guardrail comprises a support mechanism A and an enclosure mechanism B arranged on the support mechanism A, wherein the support mechanism A comprises at least two support rods 1 and a U-shaped extension rod 2 connected to the two support rods 1, and the enclosure mechanism B comprises at least two enclosure rod assemblies 3 and two cross bars 4 connected between the two enclosure rod assemblies 3, wherein the enclosure rod assembly 3 comprises:

[0041] A sleeve 30, which is sleeved on the support rod 1, and the support rod 1 can move along the length direction of the sleeve 30;

[0042] A U-shaped lever 31, both ends of which are hinged to one side of the sleeve 30 through a hinge mechanism 32, and the U-shaped lever 31 can be rotated toward the cross bar 4 through the hinge mechanism 32 and can be in an unfolded state, a folded state, and a folding transition state relative to the cross bar 4;

[0043] The hinge mechanism 32 is sleeved on the upper and lower ends of the sleeve 30, and can be hinged to the U-shaped lever 31. The hinge mechanism 32 includes a hinge seat 320 that can be sleeved on the sleeve 30 and a hinge sleeve 321 hinged on the hinge seat 320. The hinge sleeve 321 is used to be sleeved on the two end positions of the U-shaped lever 31;

[0044] A first locking assembly 33 is disposed on the hinge seat 320 and is engaged with the hinge sleeve 321. The first locking assembly 33 can lock and unlock the U-shaped lever 31 so that the U-shaped lever 31 can maintain an unfolded state, a folded state, and a folding transition state. When the first locking assembly 33 moves downward, the first locking assembly 33 unlocks the hinge mechanism 32, and the U-shaped lever 31 can rotate around the hinge with the hinge mechanism 32;

[0045] The second locking component 34 is placed on the top of the lower end of the first locking component 33 and is used to lock and unlock the first locking component 33. When the second locking component 34 moves in a direction away from the first locking component 33, the first locking component 33 can be unlocked to allow the first locking component 33 to move downward. Through the design of the supporting mechanism and the enclosure mechanism, the bed guardrail is more stable and reliable during use, avoiding shaking or tilting, and improving the overall safety of use. The design of the first locking component and the second locking component can effectively prevent the bed guardrail from accidentally opening due to accidental touching of the unlocking switch, thereby increasing the safety of the bed guardrail and ensuring the safety of the user. The design of the enclosure rod assembly enables the bed guardrail to be easily converted from an expanded state to a folded state or a folded transition state, thereby improving the flexibility and convenience of the bed guardrail and facilitating the user to adjust and store it according to needs. Through the design of the hinge mechanism and the locking component, the stable folding function of the bed guardrail is realized, while ensuring the safe switching of the guardrail between the expanded state, the folded state and the folded transition state, providing users with a more convenient and safe use experience.

[0046] Preferably, the first locking assembly 33 includes a locking block 330 with one end placed on the hinge seat 320 and the other end being insertable in the hinge sleeve 321, a first elastic member 331 placed on the lower end of the locking block 330 and located in the hinge sleeve 321, and a hinge shaft 323 passing through the hinge seat 320 and capable of being sleeved by the hinge sleeve 321, the hinge seat 320 is provided with a locking opening 3201 at the upper end corresponding to the locking block 330, the first elastic member 331 can place the locking block 330 on the locking opening 3201 to lock the hinge sleeve 321, and the hinge sleeve 321 is provided with a locking opening 3201 at the lower end corresponding to the locking block 330 There is a receiving opening 3211. When the locking block 330 moves toward the receiving opening 3211, the hinge sleeve 321 can be unlocked. The stability of the locking assembly is achieved through the combined design of the locking block, the elastic member and the locking opening, ensuring that the bed guardrail will not be accidentally opened in the locked state, thereby improving the overall safety of use. The design of the elastic member and the hinge shaft can effectively reduce the stress on the locking block, extend the service life of the locking assembly, and improve the durability and stability of the product. The design of the locking opening, the locking block and the receiving opening ensures that the bed guardrail will not be easily unlocked in the locked state, effectively preventing the occurrence of accidental injuries and improving the overall safety of the bed guardrail.

[0047] Preferably, the articulated sleeve 321 includes a hinged portion 3212 that can be hinged on the articulated seat 320 and a first connecting portion 3213 that is integrally arranged with the hinged portion 3212 and is used to connect the U-shaped gear lever 31. The hinged portion 3212 is provided with an isolation plate 3212a, and the accommodating opening 3211 is provided with at least two, which are symmetrical and spaced apart on the circumference of the isolation plate 3212a. The lower end of the locking block 330 is provided with at least two first plug-in blocks 3301 corresponding to the accommodating opening 3211, and the upper end of the locking block 330 is provided with at least two second plug-in blocks 3302. The articulated seat 320 is provided with at least two locking openings 3201 corresponding to the second plug-in blocks 3302. The combined design of the hinged portion 3212 and the connecting portion 3213 of the articulated sleeve 321 can ensure a stable connection with the articulated seat 320, and at the same time connect the U-shaped gear lever 31. , making the entire bed guardrail structure more solid, through the cooperation of the first plug block 3301 of the locking block 330 and the accommodating opening 3211, as well as the design of the second plug block 3302 of the locking block 330 and the locking opening 3201 of the hinge seat 320, the locking reliability is achieved, and the bed guardrail is prevented from being accidentally loosened or shifted. The isolation plate 3212a and the symmetrically arranged accommodating opening 3211 in the design effectively prevent the unnecessary movement of the locking block 330, thereby improving the safety of the bed guardrail and avoiding the occurrence of accidental injuries. The structure is simple and clear, and the user can easily unlock and lock the bed guardrail by plugging and unplugging the locking block 330. The operation is convenient and the user experience is improved. Preferably, there are four accommodating openings, which are perpendicular to each other and distributed at 90° around the isolation plate. The locking block and the accommodating opening can ensure the positioning during the folding process and have a 90° locking effect.

[0048] Preferably, a first limit block 3212b is further provided on the lower side of the isolation plate 3212a, and the hinged seat 320 is provided with a second limit block 3202 corresponding to the first limit block 3212b for limiting the first limit block 3212b. When the U-shaped gear lever 31 is in an unfolded state, the front end of the second limit block 3202 abuts against the rear end of the first limit block 3212b. When the U-shaped gear lever 31 is in a folded state, the rear end of the second limit block 3202 abuts against the front end of the first limit block 3212b. A first limit block 3212b is further provided on the lower side of the isolation plate 3212a, and the hinged seat 320 is provided with a second limit block 3202 corresponding to the first limit block 3212b. Its function is to limit the position of the first limit block 3212b when the U-shaped gear lever 31 is in the unfolded and folded states, thereby ensuring the stability and reliability of the bed guardrail. When the U-shaped lever 31 is unfolded, the front end of the second limit block 3202 abuts against the rear end of the first limit block 3212b, and when the U-shaped lever 31 is folded, the rear end of the second limit block 3202 abuts against the front end of the first limit block 3212b. This design can effectively control the unfolding and folding positions of the U-shaped lever 31, and ensure the stability and safety of the bed guardrail in different states.

[0049] Preferably, the first locking assembly 33 further includes a first button portion 332 that is inserted through the hinge seat 320, one end of the first button portion 332 is located outside the hinge seat 320, and the other end is in contact with the locking block 330, a button hole 322 for inserting the first button portion 332 is provided on the hinge seat 320 corresponding to the first button portion 332, a button cover plate 3320 for fixing the first button portion 332 in the button hole 322 is provided on the hinge seat 320, and a button pin 332 is provided on the lower side of the first button portion 332 1. One end of the button pin 3321 abuts against the first button part 332, and the other end abuts against the hinge mechanism 32 at the lower end of the sleeve 30. When the first button part 332 is pressed down, the locking block 330 and the button pin 3321 can be pushed downward to unlock the hinge mechanism 32 at the upper and lower ends of the sleeve 30. When the first button part 332 is pressed, the locking block 330 and the button pin 3321 can be pushed downward to unlock the hinge mechanism 32, so that the hinge mechanism 32 at the upper and lower ends of the sleeve 30 can be freely unfolded or folded. This design can effectively control the unfolding and folding state of the bed guardrail, and improves the convenience and safety of use.

[0050] Preferably, the second locking assembly 34 comprises:

[0051] A sliding lock 340 is embedded in one side of the hinge sleeve 321 and is placed on the lower end of the first locking component 33. The sliding lock 340 can move relative to the first locking component 33 toward or away from the first locking component 33. When the sliding lock 340 moves away from the lower end of the first locking component 33, the first locking component 33 can unlock the hinge mechanism 32.

[0052] A second elastic member 341, which is disposed on a side of the sliding lock 340 away from the first locking assembly 33, and is used to reset the sliding lock 340;

[0053] The limiting member 342 is inserted between the hinge sleeve 321 and the sliding lock 340 . The sliding lock 340 is provided with a limiting groove 3401 corresponding to the limiting member 342 . When the sliding lock 340 moves away from the first locking assembly 33 , the limiting groove 3401 can move relative to the limiting member 342 .

[0054] Preferably, the sliding lock 340 includes a top portion 3402 embedded in the hinge sleeve 321 and a second button portion 3403 located on the outside of the hinge sleeve 321. A groove 3210 is provided inwardly on one side of the hinge sleeve 321 for the sliding lock 340 to be embedded. The top portion 3402 can pass through the groove 3210 and abut against the lower end of the first locking component 33. The upper and lower sides of the groove 3210 are also provided with through holes 3210a corresponding to the limiting member 342 for the limiting member 342 to pass through. One end of the second elastic member 341 abuts against the sliding lock 340, and the other end abuts against the groove 3210. When the sliding lock 340 unlocks the first locking component 33, the second elastic member 341 can reset the sliding lock 340, thereby ensuring that the sliding lock 340 can be correctly reset when unlocked, thereby ensuring the normal function and safety of the bed guardrail. The provision of the limiting member 342 also helps to ensure that the sliding lock 340 operates at an appropriate position, thereby improving the reliability and stability of the bed guardrail.

[0055] Preferably, it further comprises a second lifting assembly 214 disposed on the hinge mechanism 32, the hinge mechanism 32 is provided with a third locking groove 326, the second lifting assembly 214 comprises a fourth locking member 7 embedded in the third locking groove 326 and a third elastic member 70 disposed in the third locking groove 326 and placed on the fourth locking member 7, and a positioning clamp 71 is further provided at one end of the fourth locking member 7 away from the third elastic member 70;

[0056] The hinge mechanism 32 is provided with a sleeve opening 325 for inserting the sleeve 30, and the inner wall of the sleeve opening 325 is provided with a third pin hole 3250. The positioning clamp 71 can pass through the third pin hole 3250 and be clamped on the support rod 1 to position the support rod 1. When the fourth locking member 7 moves in a direction away from the sleeve opening 325, the positioning clamp 71 can unlock the support rod 1.

[0057] A plurality of positioning holes 10 are provided on one side of the support rod 1 corresponding to the third pin hole 3250, and the positioning clamp 71 can be inserted into the positioning hole 10 to position the support rod 1. The lifting and positioning of the support rod 1 can be controlled by the second lifting assembly 214 and the positioning clamp 71, thereby ensuring that the support rod 1 can be accurately positioned and locked when needed. This helps to improve the stability and safety of the bed guardrail.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A foldable and stable bed guardrail, comprising a support mechanism (A) and a containment mechanism (B) arranged on the support mechanism (A), wherein the support mechanism (A) comprises at least two support rods (1) and a U-shaped extension rod (2) connected to the two support rods (1), and the containment mechanism (B) comprises at least two containment rod assemblies (3) and two cross bars (4) connected between the two containment rod assemblies (3), characterized in that: The enclosure rod assembly (3) comprises: A sleeve (30) is sleeved on the support rod (1), and the support rod (1) can move along the length direction of the sleeve (30); A U-shaped shift rod (31), both ends of which are hinged to one side of the sleeve (30) via a hinge mechanism (32); the U-shaped shift rod (31) can be rotated toward the cross bar (4) via the hinge mechanism (32) and can be in an unfolded state (C), a folded state (D) and a folded transition state (E) relative to the cross bar (4); An articulated mechanism (32) is sleeved on the upper and lower ends of the sleeve (30) and can be hinged to the U-shaped lever (31). The articulated mechanism (32) comprises an articulated seat (320) that can be sleeved on the sleeve (30) and an articulated sleeve (321) hinged on the articulated seat (320). The articulated sleeve (321) is used to be sleeved on the two end positions of the U-shaped lever (31); a first locking assembly (33), which is arranged on the hinge seat (320) and is engaged with the hinge sleeve (321); the first locking assembly (33) can lock and unlock the U-shaped lever (31) so that the U-shaped lever (31) can be kept in an unfolded state (C), a folded state (D) and a folded transition state (E); when the first locking assembly (33) moves downward, the first locking assembly (33) unlocks the hinge mechanism (32), and the U-shaped lever (31) can rotate around the hinge with the hinge mechanism (32); A second locking component (34) is placed on top of the lower end of the first locking component (33) and is used to lock and unlock the first locking component (33). When the second locking component (34) moves in a direction away from the first locking component (33), the first locking component (33) can be unlocked to allow the first locking component (33) to move downward.

2. The foldable and stable bed guardrail according to claim 1, characterized in that: The first locking assembly (33) comprises a locking block (330) with one end placed on the hinge seat (320) and the other end of which can be inserted into the hinge sleeve (321), a first elastic member (331) placed on the lower end of the locking block (330) and located in the hinge sleeve (321), and a hinge shaft (323) passing through the hinge seat (320) and capable of being sleeved by the hinge sleeve (321), wherein the hinge seat (320) corresponds to the locking block A locking opening (3201) is provided at the upper end of the hinge (330), and the first elastic member (331) can place the locking block (330) on the locking opening (3201) to lock the hinge sleeve (321). A receiving opening (3211) is provided at the lower end of the hinge sleeve (321) corresponding to the locking block (330), and when the locking block (330) moves in a direction close to the receiving opening (3211), the hinge sleeve (321) can be unlocked.

3. The foldable and stable bed guardrail according to claim 2, characterized in that: The hinge sleeve (321) includes a hinge portion (3212) that can be hinged on the hinge seat (320) and a first connecting portion (3213) that is integrally arranged with the hinge portion (3212) and is used to connect the U-shaped gear lever (31); an isolation plate (3212a) is arranged in the hinge portion (3212); at least two accommodating openings (3211) are arranged symmetrically and spaced apart on the circumference of the isolation plate (3212a); at least two first plug blocks (3301) are arranged at the lower end of the locking block (330) corresponding to the accommodating opening (3211); at least two second plug blocks (3302) are arranged at the upper end of the locking block (330); and at least two locking openings (3201) are arranged at the hinge seat (320) corresponding to the second plug blocks (3302).

4. The foldable and stable bed guardrail according to claim 3, characterized in that: A first limiting block (3212b) is also provided on the lower side of the isolation plate (3212a), and a second limiting block (3202) for limiting the first limiting block (3212b) is provided on the hinged seat (320) corresponding to the first limiting block (3212b); when the U-shaped lever (31) is in an unfolded state (C), the front end of the second limiting block (3202) abuts against the rear end of the first limiting block (3212b); when the U-shaped lever (31) is in a folded state (D), the rear end of the second limiting block (3202) abuts against the front end of the first limiting block (3212b).

5. The foldable and stable bed guardrail according to claim 2, characterized in that: The first locking assembly (33) further comprises a first button portion (332) which is inserted through the hinge seat (320), one end of the first button portion (332) being located outside the hinge seat (320) and the other end being in contact with the locking block (330), a button hole (322) for inserting the first button portion (332) being provided on the hinge seat (320) corresponding to the first button portion (332), and a cover on the hinge seat (320) being provided with a button for fixing the first button portion (332) to the button A key cover plate (3320) is arranged in the hole (322), and a key pin (3321) is arranged at the lower side of the first key part (332). One end of the key pin (3321) abuts against the first key part (332) and the other end abuts against the hinge mechanism (32) located at the lower end of the sleeve (30). When the first key part (332) is pressed downward, the locking block (330) and the key pin (3321) can be pushed downward respectively to unlock the hinge mechanism (32) located at the upper and lower ends of the sleeve (30).

6. The foldable and stable bed guardrail according to claim 1, characterized in that: The second locking assembly (34) comprises: a sliding lock (340) embedded in one side of the hinge sleeve (321) and placed on the lower end of the first locking component (33), and capable of moving relative to the first locking component (33) toward or away from the first locking component (33); when the sliding lock (340) moves away from the lower end of the first locking component (33), the first locking component (33) can unlock the hinge mechanism (32); a second elastic member (341), which is disposed on a side of the sliding lock (340) away from the first locking assembly (33) and is used to reset the sliding lock (340); A limiting member (342) is inserted between the hinge sleeve (321) and the sliding lock (340). The sliding lock (340) is provided with a limiting groove (3401) corresponding to the limiting member (342). When the sliding lock (340) moves away from the first locking assembly (33), the limiting groove (3401) can move relative to the limiting member (342).

7. The foldable and stable bed guardrail according to claim 6, characterized in that: The sliding lock (340) comprises a top portion (3402) embedded in the hinge sleeve (321) and a second button portion (3403) located outside the hinge sleeve (321); a groove (3210) for the sliding lock (340) to be embedded is provided inwardly on one side of the hinge sleeve (321); the top portion (3402) can pass through the groove (3210) and abut against the lower end of the first locking component (33); the upper and lower sides of the groove (3210) are also provided with through holes (3210a) corresponding to the limiting member (342) for the limiting member (342) to pass through; one end of the second elastic member (341) abuts against the sliding lock (340) and the other end abuts against the groove (3210); when the sliding lock (340) unlocks the first locking component (33), the second elastic member (341) can reset the sliding lock (340).

8. The foldable and stable bed guardrail according to claim 1, further comprising a second lifting assembly (214) disposed on the hinge mechanism (32), characterized in that: The hinge mechanism (32) is provided with a third locking groove (326), the second lifting assembly (214) comprises a fourth locking member (7) embedded in the third locking groove (326) and a third elastic member (70) arranged in the third locking groove (326) and placed on the fourth locking member (7), and a positioning clamp (71) is further provided at one end of the fourth locking member (7) away from the third elastic member (70).

9. The foldable and stable bed guardrail according to claim 8, characterized in that: The hinge mechanism (32) is provided with a sleeve opening (325) for inserting the sleeve (30), and the inner wall of the sleeve opening (325) is provided with a third pin hole (3250). The positioning clamp (71) can pass through the third pin hole (3250) and be clamped on the support rod (1) to position the support rod (1). When the fourth locking member (7) moves in a direction away from the sleeve opening (325), the positioning clamp (71) can unlock the support rod (1).

10. The foldable and stable bed guardrail according to claim 9, characterized in that: A plurality of positioning holes (10) are provided on one side of the support rod (1) corresponding to the third pin hole (3250), and the positioning clamp (71) can be inserted into the positioning hole (10) to position the support rod (1).

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