A crib frame

CN224747719UActive Publication Date: 2026-09-15ZHONGSHAN KUKAFU DAILY PROD CO LTD
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Patent Information

Application Number
CN202522134390.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-09
Publication Date
2026-09-15
Estimated Expiration
2035-10-09

AI Technical Summary

Technical Problem

但是该类婴儿床存在如下的不足:首先,床围框、支撑架和支撑框全部采用拼接结构,用户购买并拼接组成婴儿床以后,床围框、支撑架和支撑框就很难再次拆分,导致婴儿床在不需要使用时占用空间大,不便收纳

Benefits of technology

[0016] Compared with existing technologies, this utility model has the following advantages: The support frame of this utility model is rotatably connected to the connecting seats on both sides of the crib frame; the support frame is detachably connected to the sliding seat; and the connecting rod is detachably connected to the lower support. Therefore, during product packaging and transportation, the support frame is folded and close to the crib frame, and the connecting rod and support frame are also detached from the support frame, resulting in a small packaging volume. After receiving the crib, the user only needs to unfold the support frame outward and connect the connecting rod between the two support frames. Then, the support frame is also connected to the sliding seat, thus assembling the crib. The connecting rod not only strengthens the structural stability but also locks the crib in its unfolded state. Simultaneously, the support frame not only supports the bottom of the crib but also locks the crib in its unfolded state, preventing accidental folding. When the crib is not in use, the user only needs to remove the connecting rod and support frame and then rotate the support frame inward to fold it, making it convenient for storing the unused crib. In addition, the upper support rod of this utility model is located inside the lower support rod and can move upward. The lower support rod is provided with a vertical groove, and the sliding seat is located in the vertical groove. The support frame for supporting the bottom of the crib is connected to the sliding seat. Therefore, the crib is not only connected to the upper support rod, but also connected to the lower support rod through the support frame and the sliding seat. This means that the weight of the crib and the baby is no longer concentrated on the upper support rod alone, which strengthens the support for the crib and the baby. This makes the crib less prone to shaking during use, has good stability, and is safer.

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Abstract

The utility model discloses a baby crib frame, is equipped with the connecting seat in the middle part of two sides of upper surrounding frame, is equipped with the support frame that can unfold or fold relative to upper surrounding frame in connecting seat rotation connection, support frame includes with the upper support pole of connecting seat connection and with the lower support piece of upper support pole connection, and the lower support piece includes the lower support pole of setting in the outside of upper support pole and can slide relative to upper support pole, and the lower end of lower support pole is equipped with the transverse rod that extends to its both sides horizontally, is equipped with the connecting rod of detachable connection with both in two lower support pieces, is equipped with the vertical groove that recesses inward on the lower support pole, is equipped with the sliding seat in vertical groove, is equipped with the linkage rod of connecting both and can drive sliding seat sliding when upper support pole slides relative to lower support pole between sliding seat and upper support pole, and the both sides of sliding seat are detachably connected with the U-shaped support frame for supporting the bottom of bed body, is equipped with the height adjusting mechanism that can adjust the relative height of both between upper support pole and lower support pole. The utility model discloses simple structure can fold and store, and high stability.
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Description

[Technical Field]

[0001] This utility model relates to a baby crib frame. [Background Technology]

[0002] As the primary resting place for infants and toddlers, the safety, stability, and convenience of a crib are paramount. Currently, cribs on the market generally consist of a crib frame with support frames on both sides. These support frames include upper and lower support tubes. The upper support tube connects to the crib frame, and the lower support tube connects to a horizontal tube at its lower end. The horizontal tube is connected to wheels and supports the crib on the ground. The upper support tube is fitted over the lower support tube, allowing it to move up and down. A support frame at the lower end of the upper support tube supports the bottom of the crib. A fabric cover is placed between the support frame and the crib frame to form the crib body, creating a resting space for the child. However, this type of crib has the following drawbacks: First, the crib frame, support frame, and support panel are all assembled from parts. Once the user purchases and assembles the crib, it is difficult to disassemble them again, resulting in the crib taking up a lot of space and being inconvenient to store when not in use. In addition, the upper support tube is sleeved on the outside of the lower support tube, and the entire bed is connected to the upper support tube. This structure has the defect of being heavy at the top and light at the bottom. The weight of the bed and the baby is all concentrated at the top, the support foundation is weak, and the bed is easy to shake when the baby rolls over, crawls or bumps into things, resulting in low stability.

[0003] Therefore, this utility model was created based on the above-mentioned shortcomings. [Utility Model Content]

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a baby crib frame that is simple in structure, can be folded for storage, and has high stability.

[0005] This utility model is achieved through the following technical solution:

[0006] A crib frame includes an upper frame with connecting seats at the center of both sides. A support frame, rotatably connected to the connecting seats and capable of unfolding or folding relative to the upper frame, is provided. The support frame includes an upper support rod connected to the connecting seats and a lower support member connected to the upper support rod. The lower support member includes a lower support rod sleeved on the outside of the upper support rod and capable of sliding relative to it. A transverse rod extending laterally to both sides is provided at the lower end of the lower support rod. A connecting rod detachably connected to both lower support members is provided. A recessed vertical groove is provided on the lower support rod, and a sliding seat is provided within the vertical groove. A linkage rod connecting the sliding seat and the upper support rod, which drives the sliding seat to slide when the upper support rod slides relative to the lower support rod, is provided. U-shaped support frames for supporting the bottom of the crib are detachably connected to both sides of the sliding seat. A height adjustment mechanism is provided between the upper and lower support rods to adjust their relative height.

[0007] The height adjustment mechanism includes multiple adjustment holes at the bottom of the vertical groove. The lower end of the upper support rod is provided with a fixed seat. The fixed seat contains a locking pin that can move laterally and engage or disengage with the adjustment holes. The upper end of the upper support rod is provided with a sliding sleeve that can slide relative to it. The upper end of the upper support rod is provided with a sliding seat that is fixedly connected to the sliding sleeve and can slide with it. The upper end of the linkage rod is connected to the sliding seat. A traction member is provided between the sliding seat and the locking pin that can drive the locking pin to disengage from the adjustment holes when the sliding seat slides upward. A first return spring is provided between the upper support rod and the sliding seat that can push the sliding seat downward to reset. A second return spring is provided in the fixed seat that can drive the locking pin to reset.

[0008] The traction component includes a sliding block disposed within a fixed base. A pull rope is provided between the sliding block and the sliding base to pull the sliding block to slide. A horizontal shaft is provided on the locking pin. An oblique hole is provided on the sliding block for the horizontal shaft to pass through. When the sliding block slides upward, the wall of the oblique hole pushes the horizontal shaft, causing the locking pin to disengage from the adjustment hole. The second return spring is disposed between the sliding block and the fixed base and pushes the locking pin to return to its original position when the sliding block is pushed to return to its original position.

[0009] The upper end of the upper support rod is provided with a double locking structure. The double locking structure includes a limiting hole opened on the side wall of the upper support rod. The sliding seat is provided with a limiting block that can slide inside and enter or exit the limiting hole. The sliding sleeve is provided with a button that is connected to the limiting block and can push the limiting block out of the limiting hole. A third return spring is provided between the sliding seat and the limiting block to push the limiting block and the button back to their original positions.

[0010] The sliding seat is provided with two guide grooves, and the limiting block is provided with guide blocks on both sides that cooperate with the guide grooves.

[0011] One of the support frames is detachably connected to a backing bracket that can rest against the side of an adult mattress, and the horizontal bar on the crib frame and on the same side as the backing bracket is a telescopic structure.

[0012] The lower support also includes a connector, which has a first connecting sleeve, a second connecting sleeve and a third connecting sleeve. The lower end of the lower support rod is inserted into the first connecting sleeve, and two transverse rods on the same side as the lower support rod are respectively inserted into the second connecting sleeve and the third connecting sleeve. The connecting rod is detachably connected to the connector.

[0013] The horizontal bar is equipped with wheels for moving the crib frame. A rotating seat is rotatably connected to the plug-in base. The rotating seat can be positioned in two ways: a support position that can be supported on the ground and a suspended position that can be lifted off the ground after rotating relative to the plug-in base. The rotating seat has an arc surface. When the rotating seat is in the support position, the arc surface supports the ground and lifts the wheels on the horizontal bar off the ground. The rotating seat has an arc-shaped groove. The lower end of the plug-in base matches the arc-shaped groove so that the rotating seat can engage with the plug-in base when it is in the support position.

[0014] The rotating seat is equipped with elastic open grippers. When the rotating seat is in the suspended position, the open grippers engage with the connecting rod.

[0015] The support frame is equipped with a bed board.

[0016] Compared with existing technologies, this utility model has the following advantages: The support frame of this utility model is rotatably connected to the connecting seats on both sides of the crib frame; the support frame is detachably connected to the sliding seat; and the connecting rod is detachably connected to the lower support. Therefore, during product packaging and transportation, the support frame is folded and close to the crib frame, and the connecting rod and support frame are also detached from the support frame, resulting in a small packaging volume. After receiving the crib, the user only needs to unfold the support frame outward and connect the connecting rod between the two support frames. Then, the support frame is also connected to the sliding seat, thus assembling the crib. The connecting rod not only strengthens the structural stability but also locks the crib in its unfolded state. Simultaneously, the support frame not only supports the bottom of the crib but also locks the crib in its unfolded state, preventing accidental folding. When the crib is not in use, the user only needs to remove the connecting rod and support frame and then rotate the support frame inward to fold it, making it convenient for storing the unused crib. In addition, the upper support rod of this utility model is located inside the lower support rod and can move upward. The lower support rod is provided with a vertical groove, and the sliding seat is located in the vertical groove. The support frame for supporting the bottom of the crib is connected to the sliding seat. Therefore, the crib is not only connected to the upper support rod, but also connected to the lower support rod through the support frame and the sliding seat. This means that the weight of the crib and the baby is no longer concentrated on the upper support rod alone, which strengthens the support for the crib and the baby. This makes the crib less prone to shaking during use, has good stability, and is safer. [Attached Image Description]

[0017] Figure 1 This is one of the perspective views of this utility model;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is the second perspective view of this utility model;

[0020] Figure 4 This is the book Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is an exploded view of the present invention;

[0022] Figure 6 yes Figure 5 Enlarged view at point B;

[0023] Figure 7 yes Figure 5 A magnified view at point C;

[0024] Figure 8 This is an exploded view of the components of this utility model;

[0025] Figure 9 This is one of the cross-sectional views of a component of this utility model;

[0026] Figure 10 This is the second sectional view of a component of this utility model;

[0027] Figure 11 This is a schematic diagram of the folded state of this utility model;

[0028] Figure 12 This is the third perspective view of this utility model.

Detailed Implementation Methods

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figure 1 , Figure 2 and Figure 11 As shown, this embodiment provides a crib frame, including an upper frame 1. The upper frame 1 has a rectangular frame structure and is used to define the top perimeter of the crib. The crib is surrounded by a flexible fabric cover, which is not shown in the figure. Connecting seats 2 are fixedly provided at the middle of both sides of the upper frame 1, and a support frame 3 is rotatably connected to the connecting seats 2, thereby realizing that the support frame 3 and the upper frame 1 can be unfolded or folded together.

[0031] like Figures 1 to 3As shown, the support frame 3 mainly includes an upper support rod 31 and a lower support member 32. The upper end of the upper support rod 31 is rotatably connected to the connecting seat 2. The lower support member 32 includes a lower support rod 321 and a transverse rod 322. The lower support rod 321 is sleeved on the outside of the upper support rod 31, and the upper support rod 31 can slide up and down inside the lower support rod 321. The transverse rod 322 is located at the lower end of the lower support rod 321 and extends laterally to both sides. These two transverse rods 322 and the lower support rod 321 together form an approximately T-shaped bottom support structure, providing lateral stability for the crib frame. A connecting rod 4 is provided between the lower support members 32 of the two support frames 3. The two ends of the connecting rod 4 are detachably connected to the lower support members 32 on both sides by means such as pins or buckles, thereby connecting the two support frames 3 together and enhancing the overall structural stability. Furthermore, when the crib is in the unfolded state, the connecting rod 4 also prevents the support frame 3 from accidentally rotating and folding, thus locking the crib in the unfolded state.

[0032] like Figure 1 and Figure 3 As shown, a recessed vertical groove 33 is formed on the lower support rod 321. A sliding seat 51 is disposed in the vertical groove 33 and can slide up and down along the length of the vertical groove 33. The sliding seat 51 is connected to the upper support rod 31 by a linkage rod 52, and the two ends of the linkage rod 52 are respectively connected to a component (specifically, a sliding seat 74, see below) on the sliding seat 51 and the upper support rod 31. When the upper support rod 31 slides relative to the lower support rod 321, the sliding seat 51 can be driven to slide synchronously in the vertical groove 33 through the transmission of the linkage rod 52. The two sides of the sliding seat 51 are detachably connected to a U-shaped support frame 61 by means such as quick-release pins or snap-fit ​​components. The support frame 61 is used to support the bottom of the bed frame, for example, to place the bed board 8 (e.g. Figure 12 (As shown) or a mattress is supported to provide effective support for the baby. The support frame 61 not only supports the crib but also locks the crib in its unfolded state. When the crib needs to be folded, the support frame 61 and connecting rod 4 must first be removed before the support frame 3 can be rotated to fold. Folding the support frame 3 allows the crib to be easily stored away when not in use, reducing its space occupation in the home. Furthermore, the sliding seat 51 is located in the vertical groove 33 of the lower support rod 321, so that the crib is connected to the upper support rod 31 not only through the upper frame 1 but also through the support frame 61 and the sliding seat 61 to the lower support rod 321. This design distributes the weight of the crib and the baby throughout the frame, rather than concentrating it solely on the upper support rod 31, thereby enhancing the support for the crib and the baby. The crib is less prone to wobbling during use, significantly improving stability and making it safer and more reliable to use. Moreover, when the height of the bed needs to be adjusted, the upper support rod 31 can slide relative to the lower support rod 321, which can also drive the sliding seat 51 to slide in the vertical groove 33 through the linkage rod 52, making the lifting and lowering of the bed very smooth and stable.

[0033] like Figures 5 to 10 As shown, a height adjustment mechanism 7 is provided between the upper support rod 31 and the lower support rod 321 to achieve height adjustment of the crib frame. This height adjustment mechanism 7 mainly includes multiple vertically arranged adjustment holes 71 located at the bottom of the vertical groove 33. A fixed base 34 is fixedly installed at the lower end of the upper support rod 31. The fixed base 34 houses a laterally movable locking pin 72. Under the preload of the second return spring 77, the locking pin 72 tends to pop outward and engage with one of the adjustment holes 71, thereby locking the relative position of the upper support rod 31 and the lower support rod 321. A sliding sleeve 73 is fitted around the upper end of the upper support rod 31, allowing it to slide relative to the upper support rod 31. A sliding seat 74, fixedly connected to the sliding sleeve 73, is provided inside the upper end of the upper support rod 31, allowing the sliding sleeve 73 to slide synchronously with the sliding seat 74. The upper end of the aforementioned linkage rod 52 is connected to this sliding seat 74. A traction member 75 is provided between the sliding seat 74 and the locking pin 72. When height adjustment is required, pull the sliding sleeve 73 upward. The upward sliding of the sliding sleeve 73 causes the sliding seat 74 to move upward. The traction member 75 converts the upward movement of the sliding seat 74 into a lateral traction force on the locking pin 72, causing the locking pin 72 to overcome the elastic force of the second return spring 77 and disengage from the current adjustment hole 71. At this time, the upper support rod 31 can slide relative to the lower support rod 321. During the sliding process, the upper support rod 31 also pushes the sliding seat 51 to slide through the linkage rod 52, thereby adjusting the height of the crib. After the adjustment is in place, release the sliding sleeve 73. Under the action of the first return spring 76 (e.g., a compression spring, set between the upper support rod 31 and the sliding seat 74 to provide a downward return force), the sliding seat 74 moves downward to reset. The traction member 75 releases the traction on the locking pin 72. Under the action of the second return spring 77, the locking pin 72 re-locks into the corresponding height adjustment hole 71, completing the height locking. The entire height adjustment process is very convenient and quick. Simply move the sliding sleeve 73 upwards, then press down on the upper frame 1, and finally release the sliding sleeve 73 to complete the operation.

[0034] like Figure 7 and Figure 9As shown, in this embodiment, the traction member 75 includes a sliding block 751 disposed within the fixed base 34, which slides up and down. The sliding block 751 is connected to the upper sliding seat 74 by a pull rope 752, which passes through the interior of the upper support rod 31. A horizontal shaft 753 is fixedly disposed on the locking pin 72. An oblique hole 754 is provided on the sliding block 751, and the horizontal shaft 753 passes through the oblique hole 754. When the sliding seat 74 moves upward, the pull rope 752 pulls the sliding block 751 upward, and the wall of the oblique hole 754 interacts with the horizontal shaft 753, generating a lateral force that pushes the horizontal shaft 753 and the locking pin 72 connected to it to move laterally, causing it to disengage from the adjusting hole 71. The second reset spring 77 is located between the sliding block 751 and the fixed seat 34. When the sliding seat 74 moves down to reset and the pull rope 752 is loosened, the second reset spring 77 pushes the sliding block 751 to move down to reset. At the same time, the wall of the inclined hole 754 acts as the horizontal axis 754, causing the locking pin 72 to reset with the assistance of the second reset spring 77, so that it can be engaged with the adjustment hole 71 again.

[0035] like Figure 6 , Figure 8 and Figure 10 As shown, to prevent accidental height changes due to misoperation, a double-locking structure 78 is provided at the upper end of the upper support rod 31. This double-locking structure 78 includes a limiting hole 781 formed on the side wall of the upper support rod 31. A limiting block 782, which can slide inside the sliding seat 74, is provided inside. A button 783 slides through the sliding sleeve 73, and this button 783 is connected to the limiting block 782. In the normal locked state, the elastic force of the third return spring 784 acts on the limiting block 782 and the button 783, causing a portion of the limiting block 782 to extend out of the sliding seat 74 and enter the limiting hole 781 of the upper support rod 31, thereby preventing the sliding seat 74 and the sliding sleeve 73 from moving upwards. When unlocking for height adjustment is required, pressing the button 783 overcomes the elastic force of the third return spring 784, causing the limiting block 782 to exit from the limiting hole 781, at which point the sliding sleeve 73 can be pulled upwards. To ensure the stability of the movement of the limit block 782, two guide grooves 785 are provided on the sliding seat 74, and guide blocks 786 that cooperate with the guide grooves 785 are provided on both sides of the limit block 782.

[0036] like Figure 1 and Figure 2As shown, to allow the crib to be used close to the adult bed as a bedside bed, a support frame 62 is detachably connected to one of the support frames 61 via means such as snaps or plugs. This support frame 62 can extend out and rest against the side of the adult bed mattress, increasing the stability of the crib and preventing it from wobbling. Furthermore, placing the crib next to the adult bed makes it convenient for adults to supervise the child. The horizontal bar 322, located on the same side as the support frame 62, is designed to be retractable, allowing it to adapt to the adult bed frame. For example, if the adult bed frame has a hollow underside, the horizontal bar 322 extends directly under the bed frame, with the support frame 62 resting against the side of the mattress. If the adult bed frame has a solid side, the horizontal bar 322 retracts, allowing the support frame 62 to rest against the side of the mattress, thus better adapting the crib to the adult bed.

[0037] like Figure 2 and Figure 4 As shown, the lower support 32 also includes a connector 323. This connector 323 has a first connecting sleeve 3231, a second connecting sleeve 3232, and a third connecting sleeve 3233. The lower end of the lower support rod 321 is inserted into the first connecting sleeve 3231 and fixed by a locking screw or similar means. The ends of the two transverse rods 322 on the same side as the lower support rod 321 are respectively inserted into the second connecting sleeve 3232 and the third connecting sleeve 3233 and fixed. The connecting rod 4 is detachably connected to the connector 323 by means such as a pin. To facilitate the movement of the crib frame, wheels 324 are installed on the transverse rods 322. Simultaneously, a rotating seat 325 is rotatably connected to the connector 323. This rotating seat 325 can remain in two main positions: a supported position and a suspended position. When the rotating seat 325 rotates to the support position, its bottom arc surface 3251 supports the ground. At this time, the wheels 324 on the horizontal bar 322 are off the ground, allowing the user to rock the crib back and forth to soothe the baby. When the user does not want to rock the crib, the rotating seat 325 needs to be rotated to the suspended position so that the wheels 324 are supported on the ground for safety. The rotating seat 325 has an arc-shaped groove 3252. When the rotating seat 325 is in the support position, the lower end of the insertion seat 323 matches and engages with the arc-shaped groove 3252, enhancing the stability of the rotating seat 325 in its resting position. When it is necessary to move the crib frame or not to rock the crib frame, the rotating seat 325 is rotated from the support position to the suspended position. At this time, the wheels 324 contact the ground, allowing it to be pushed or stopped. In the suspended position, the elastic open claw 3253 on the rotating seat 325 can engage with the connecting rod 4 to fix the rotating seat 325 in this position and prevent it from swinging randomly.

[0038] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A crib frame, characterized in that: The system includes an upper frame (1), with connecting seats (2) located at the center of both sides of the upper frame (1). A support frame (3) rotatably connects to the connecting seats (2) and can be unfolded or folded relative to the upper frame (1). The support frame (3) includes an upper support rod (31) connected to the connecting seats (2) and a lower support member (32) connected to the upper support rod (31). The lower support member (32) includes a lower support rod (321) sleeved on the outside of the upper support rod (31) and capable of sliding relative to the upper support rod (31). A transverse rod (322) extending laterally to both sides is provided at the lower end of the lower support rod (321). A connection is provided between the two lower support members (32). The two are detachably connected by a connecting rod (4). The lower support rod (321) is provided with an inwardly recessed vertical groove (33). A sliding seat (51) is provided in the vertical groove (33). A linkage rod (52) is provided between the sliding seat (51) and the upper support rod (31) to connect the two and drive the sliding seat (51) to slide when the upper support rod (31) slides relative to the lower support rod (321). The sliding seat (51) is detachably connected to a U-shaped support frame (61) for supporting the bottom of the bed. A height adjustment mechanism (7) is provided between the upper support rod (31) and the lower support rod (321) to adjust the relative height of the two.

2. The crib frame according to claim 1, characterized in that: The height adjustment mechanism (7) includes multiple adjustment holes (71) at the bottom of the vertical groove (33). The lower end of the upper support rod (31) is provided with a fixed seat (34). The fixed seat (34) is provided with a locking pin (72) that can move laterally and engage or disengage with the adjustment hole (71). The upper end of the upper support rod (31) is provided with a sliding sleeve (73) that can slide relative to it. The upper end of the upper support rod (31) is provided with a sliding seat (74) that is fixedly connected to the sliding sleeve (73) and can slide along with it. The upper end of the linkage rod (52) is connected to the sliding seat (74). A traction member (75) is provided between the sliding seat (74) and the locking pin (72) so that the locking pin (72) can be disengaged from the adjustment hole (71) when the sliding seat (74) slides upward. A first return spring (76) is provided between the upper support rod (31) and the sliding seat (74) so ​​as to push the sliding seat (74) to return downward. A second return spring (77) is provided in the fixed seat (34) so ​​as to drive the locking pin (72) to return.

3. The crib frame according to claim 2, characterized in that: The traction member (75) includes a sliding block (751) disposed in the fixed seat (34). A pull rope (752) is provided between the sliding block (751) and the sliding seat (74) to pull the sliding block (751) to slide. A horizontal shaft (753) is provided on the locking pin (72). An oblique hole (754) is provided on the sliding block (751) for the horizontal shaft (753) to pass through. When the sliding block (751) slides upward, the wall of the oblique hole (754) pushes the horizontal shaft (753) to disengage the locking pin (72) from the adjusting hole (71). The second return spring (77) is disposed between the sliding block (751) and the fixed seat (34) and pushes the locking pin (72) to return to its original position when the sliding block (751) is pushed to return to its original position.

4. The crib frame according to claim 3, characterized in that: The upper end of the upper support rod (31) is provided with a double locking structure (78). The double locking structure (78) includes a limiting hole (781) opened on the side wall of the upper support rod (31). The sliding seat (74) is provided with a limiting block (782) that can slide inside and enter or exit the limiting hole (781). The sliding sleeve (73) is slidably provided with a button (783) that is connected to the limiting block (782) and can push the limiting block (782) out of the limiting hole (781). A third return spring (784) is provided between the sliding seat (74) and the limiting block (782) that can push the limiting block (782) and the button (783) to reset.

5. The crib frame according to claim 4, characterized in that: The sliding seat (74) is provided with two guide grooves (785), and the limiting block (782) is provided with guide blocks (786) on both sides that cooperate with the guide grooves (785).

6. The crib frame according to claim 1, characterized in that: One of the support frames (61) is detachably connected to a support frame (62) that can abut against the side of an adult mattress. The horizontal bar (322) on the crib frame and on the same side as the support frame (62) is a telescopic structure.

7. The crib frame according to claim 1, characterized in that: The lower support (32) further includes a plug-in seat (323), which has a first connecting sleeve (3231), a second connecting sleeve (3232) and a third connecting sleeve (3233). The lower end of the lower support rod (321) is inserted into the first connecting sleeve (3231), and two transverse rods (322) on the same side as the lower support rod (321) are respectively inserted into the second connecting sleeve (3232) and the third connecting sleeve (3233). The connecting rod (4) is detachably connected to the plug-in seat (323).

8. The crib frame according to claim 7, characterized in that: The horizontal bar (322) is provided with wheels (324) for moving the crib frame. The plug-in seat (323) is rotatably connected to a rotating seat (325). The rotating seat (325) can be positioned in a support position that can be supported on the ground and a suspended position that can be lifted off the ground after rotating relative to the plug-in seat (323). The rotating seat (325) is provided with an arc surface (3251). When the rotating seat (325) is in the support position, the arc surface (3251) supports the ground and lifts the wheels (324) on the horizontal bar (322) off the ground. The rotating seat (325) is provided with an arc-shaped groove (3252). The lower end of the plug-in seat (323) matches the arc-shaped groove (3252) so that the rotating seat (325) can engage with the plug-in seat (323) when it is in the support position.

9. The crib frame according to claim 8, characterized in that: The rotating seat (325) is provided with an elastic open gripper (3253). When the rotating seat (325) is in the suspended position, the open gripper (3253) engages with the connecting rod (4).

10. The crib frame according to claim 1, characterized in that: The support frame (61) is provided with a bed board (8).