Baby crib with adjustable height

Abstract

The utility model provides a baby crib with adjustable height, relates to the baby crib technical field, the baby crib with adjustable height comprises a crib body assembly, a lifting assembly and a crib leg assembly, the lifting assembly comprises a pushing hand unit, a swing arm and a lifting unit, one end of the swing arm is connected with the crib body assembly and is used for lifting the crib body assembly, and the other end of the swing arm is used for lifting the crib leg assembly. The other end of the swing arm is connected with the movable end of the lifting unit through the pushing hand unit, and the fixed end of the lifting unit is arranged on the machine leg assembly. According to the baby crib, the portability of the baby crib in the using process can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of baby crib technology, and more specifically, to a height-adjustable baby crib. Background Technology

[0002] In modern childcare, cribs are essential for newborns, widely used in homes, daycare centers, and hospital maternity wards. They not only provide infants with an independent and safe sleeping space, effectively reducing the risk of suffocation caused by adults squeezing or covering them while sleeping, but also facilitate daily care for the baby. Meanwhile, with rising consumer expectations, parents are demanding higher levels of comfort, safety, and versatility from cribs.

[0003] In related technologies, most existing cribs have a fixed height, which makes it difficult to meet the needs of different usage scenarios and families.

[0004] Traditional cribs typically employ an integrated structural design, with components such as the crib frame and bed board connected by welding or bolts. The fixed height of the crib may require parents to bend over or stand on tiptoe when picking up or putting down the baby, affecting the ease of use of the crib. Utility Model Content

[0005] The problem this invention addresses is how to improve the ease of use of baby cribs.

[0006] To address the aforementioned problems, this utility model provides an adjustable-height baby crib.

[0007] In a first aspect, the present invention provides an instrument panel crossbeam assembly, including a bed assembly, a lifting assembly, and a foot assembly. The lifting assembly includes a pusher unit, a swing arm, and a lifting unit. One end of the swing arm is connected to the bed assembly for supporting the bed assembly. The other end of the swing arm is connected to the movable end of the lifting unit through the pusher unit. The fixed end of the lifting unit is disposed on the foot assembly.

[0008] Optionally, the lifting unit includes a self-locking gas spring, an operating handle, a control component, and a connecting component. The fixed end of the self-locking gas spring is disposed on the machine foot assembly, and the movable end of the self-locking gas spring is connected to the bottom surface of the pusher unit through the connecting component. The operating handle is disposed on the pusher unit, and the operating handle is connected to the self-locking switch of the self-locking gas spring through the control component. The axial direction of the self-locking gas spring is parallel to the vertical direction.

[0009] Optionally, the control element includes a guide tube and a control line. One end of the guide tube passes through the pusher unit and communicates with the operating handle. The other end of the guide tube is connected to the connector. One end of the control line is connected to the operating handle. The other end of the control line passes through the guide tube and is connected to the self-locking switch located at the other end of the guide tube. The control element is configured such that when the operating handle pulls one end of the control line, the self-locking switch is opened through the other end of the control line.

[0010] Optionally, the operating handle includes an operating column, a lifting adjustment component, a connecting rod, a fixing component, and a fixing head. The operating column has a through hole along its axial direction. One end of the operating column is connected to the upper surface of the pusher unit. The guide tube passes through the pusher unit and is fixedly connected to the inner wall of the operating column through the fixing component. Rectangular through holes are respectively provided at the relative positions of the side arms at the other end of the operating column. The length direction of the rectangular through holes is the same as the axial direction of the operating column. Both ends of the connecting rod pass through the rectangular through holes and are connected to the lifting adjustment component sleeved on the operating column. One end of the control line is connected to the connecting rod located inside the operating column through the fixing head.

[0011] Optionally, the self-locking gas spring includes a cylinder body, a piston rod, and a self-locking switch. The cylinder body is mounted on the machine foot assembly, the piston rod is mounted inside the cylinder body, one end of the piston rod extends from the front end cover of the cylinder body and connects to the connecting member, and the self-locking switch is located at the end of the piston rod near the connecting member.

[0012] Optionally, the connector includes a first connecting plate and a second connecting plate. First side arms extend vertically from opposite sides of the first connecting plate, and second side arms extend vertically from opposite sides of the second connecting plate. The first side arms and the second side arms are rotatably connected. The bottom surface of the first connecting plate is connected to the bottom surface of the pusher unit, and the bottom surface of the second connecting plate is connected to one end of the piston rod. A first through hole is provided on the second connecting plate at a position corresponding to the piston rod. The diameter of the first through hole matches the diameter of the piston rod. The self-locking switch is disposed between the first connecting plate and the second connecting plate and is connected to the piston rod through the first through hole.

[0013] Optionally, the bottom surface of the second connecting plate is connected to the other end of the guide tube, and the second connecting plate is provided with a second through hole at a position corresponding to the guide tube. The diameter of the second through hole matches the diameter of the guide tube, and the other end of the control line passes through the second through hole and is connected to the self-locking switch.

[0014] Optionally, the pusher unit includes a movable handle and a fixed plate, the upper surface of the fixed plate is connected to the other end of the swing arm, the lower surface of the fixed plate is connected to the movable end of the lifting unit, and the movable handle is located on the side of the fixed plate away from the bed assembly.

[0015] Optionally, the crib also includes a first lifting cover and a second lifting cover. The first lifting cover is fitted onto the lifting assembly, and the bottom end of the first lifting cover is fixedly connected to the foot assembly. The second lifting cover is fitted onto the first lifting cover, and the top end of the second lifting cover is fixedly connected to the bottom surface of the pusher unit.

[0016] Optionally, the crib also includes casters located at the bottom of the foot assembly.

[0017] The beneficial effects of this height-adjustable crib are as follows: By mounting the fixed end of the lifting unit on the foot assembly, the crib receives stable support, preventing wobbling under stress and improving overall stability and safety. The movable end of the lifting unit is connected to the swing arm via a pusher unit, allowing the movable end of the lifting unit to drive the connected pusher unit and swing arm to move up and down. Furthermore, the swing arm, located away from the lifting unit, lifts the connected bed frame, causing the bed frame to move up and down along with the movable end of the lifting unit, thus adjusting the height of the bed frame. This height adjustment allows the crib to adapt to different user needs, preventing parents from excessively bending or leaning forward due to an unsuitable height, thereby improving convenience during use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the adjustable height baby crib in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure at point A;

[0020] Figure 3 This is a schematic diagram of the structure of the self-locking gas spring and connecting member in the embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the operating handle in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the lifting cover in an embodiment of the present utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1-Bed frame assembly; 2-Lifting assembly; 21-Push handle unit; 211-Moving handle; 212-Fixed plate; 22-Swing arm; 23-Lifting unit; 231-Self-locking gas spring; 2311-Cylinder; 2312-Piston rod; 2313-Self-locking switch; 232-Operating handle; 2321-Operating column; 2322-Lifting adjustment component; 2323-Connecting rod; 2324-Fixed component; 2325-Fixed head; 233-Control component; 2331-Guide tube; 2332-Control line; 234-Connecting component; 2341-First connecting plate; 2342-Second connecting plate; 2343-First side arm; 2344-Second side arm; 3-Foot assembly; 4-First lifting cover; 5-Second lifting cover; 6-Universal caster. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0026] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0027] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0028] Combination Figure 1As shown in the figure, an adjustable height baby crib provided by this utility model embodiment includes a crib body assembly 1, a lifting assembly 2, and a foot assembly 3. The lifting assembly 2 includes a pusher unit 21, a swing arm 22, and a lifting unit 23. One end of the swing arm 22 is connected to the crib body assembly 1 for supporting the crib body assembly 1. The other end of the swing arm 22 is connected to the movable end of the lifting unit 23 through the pusher unit 21. The fixed end of the lifting unit 23 is disposed on the foot assembly 3.

[0029] Specifically, the lifting assembly 2, a key device for adjusting the height of the crib, includes a pusher unit 21, a swing arm 22, and a lifting unit 23. The crib assembly 1 is located at one end of the swing arm 22, which supports the crib assembly 1. The other end of the swing arm 22 is connected to the movable end of the lifting unit 23 via the pusher unit 21. The lifting unit 23 then drives the connected swing arm 22 to move up and down, allowing the swing arm 22 to support the crib assembly 1 at the other end for height adjustment. By placing the fixed end of the lifting unit 23 on the foot assembly 3, the weight of the lifting unit 23 from the crib assembly 1 can be transferred to the foot assembly 3, thus ensuring the stability of the entire crib structure through the support of the foot assembly 3.

[0030] It should be noted that the lifting unit 23 can be an electric push rod structure, a hydraulic lifting structure, or a pneumatic lifting structure. The electric push rod structure uses a motor to drive a lead screw to rotate, causing the nut to move linearly along the lead screw, thereby extending or retracting the push rod (movable end). One end of the electric push rod is fixedly connected to the machine foot assembly 3, and the movable end is connected to the pusher unit 21. By controlling the forward and reverse rotation and the number of rotations of the motor, the extension and retraction length of the push rod can be precisely controlled, thus achieving smooth and precise lifting and lowering of the bed assembly 1. This structure is convenient to operate, highly automated, and suitable for various scenarios with high requirements for lifting accuracy and convenience. The hydraulic lifting structure uses a hydraulic pump to deliver hydraulic oil to a hydraulic cylinder, pushing the piston to produce linear motion to achieve lifting and lowering. It has strong power, can support the weight of the bed assembly 1, and the lifting process is smooth with good cushioning performance. It has significant advantages in situations requiring the support of heavy beds or where strict requirements for lifting smoothness are necessary. However, this structure is relatively complex and has higher maintenance costs. Pneumatic lifting structure: Similar to hydraulic lifting structures, pneumatic lifting structures use an air pump to fill or discharge gas into a cylinder, using the gas pressure to push a piston and achieve lifting action. This structure has a fast response time and a relatively smooth lifting process, and is often used in products that require a certain level of lifting speed and comfort. Moreover, compared to hydraulic structures, it is simpler in structure, lower in cost, and relatively easier to maintain.

[0031] In this embodiment, the fixed end of the lifting unit 23 is mounted on the foot assembly 3, thereby providing stable support for the crib and preventing it from wobbling under stress, thus improving the overall stability and safety of the crib. The movable end of the lifting unit 23 is connected to the swing arm 22 via the pusher unit 21, allowing the movable end of the lifting unit 23 to drive the pusher unit 21 and the swing arm 22 to move up and down. Furthermore, the end of the swing arm 22 away from the lifting unit 23 lifts the connected bed assembly 1, causing the bed assembly 1 to move up and down along with the movable end of the lifting unit 23, thereby adjusting the height of the bed assembly 1. By adjusting the height of the crib, it can adapt to different height requirements, avoiding excessive bending or stooping for parents due to unsuitable heights, thus improving the convenience of using the crib.

[0032] Combination Figures 1 to 3 As shown, optionally, the lifting unit 23 includes a self-locking gas spring 231, an operating handle 232, a control component 233, and a connecting component 234. The fixed end of the self-locking gas spring 231 is disposed on the machine foot assembly 3, and the movable end of the self-locking gas spring 231 is connected to the bottom surface of the pusher unit 21 through the connecting component 234. The operating handle 232 is disposed on the pusher unit 21, and the operating handle 232 is connected to the self-locking switch 2313 of the self-locking gas spring 231 through the control component 233. The axial direction of the self-locking gas spring 231 is parallel to the vertical direction.

[0033] In this optional embodiment, the self-locking gas spring 231, which can be locked at any position of its travel, plays an important role in the lifting and lowering process of the crib. The fixed end of the self-locking gas spring 231, i.e., the bottom of the cylinder 2311, is fixed to the foot assembly 3, and the self-locking gas spring 231 is perpendicular to the foot assembly 3. This allows the self-locking gas spring 231 to transfer all the weight from the crib assembly 1 to the foot assembly 3, thereby ensuring the overall stability of the crib through the support of the foot assembly 3. The movable end of the self-locking gas spring 231 is connected to the bottom surface of the pusher unit 21 via a connector 234, wherein the movable end of the self-locking gas spring 231 is also the movable end of the lifting unit 23. When the movable end moves vertically up and down, it can move the pusher unit 21 connected to it, and the swing arm 22 connected to it can lift the bed assembly 1 up and down. When the bed assembly 1 reaches the desired height, the movement of the movable end of the self-locking gas spring 231 can be stopped, so that the bed assembly 1 is kept at the current suitable height. By setting the operating handle 232 for controlling the raising and lowering of the self-locking gas spring 231 in a suitable position on the pusher unit 21, and connecting it to the self-locking switch 2313 of the self-locking gas spring 231 through the control component 233, the operator can easily adjust the height of the crib through the operating handle 232, and at the same time push the crib to the desired position through the pusher unit 21, avoiding complicated operations when adjusting the height and position, and greatly improving the convenience of adjusting the position and height of the crib.

[0034] Combination Figures 1 to 3 As shown, optionally, the control element 233 includes a guide tube 2331 and a control line 2332. One end of the guide tube 2331 passes through the pusher unit 21 and communicates with the operating handle 232. The other end of the guide tube 2331 is connected to the connector 234. One end of the control line 2332 is connected to the operating handle 232. The other end of the control line 2332 passes through the guide tube 2331 and is connected to the self-locking switch 2313 located at the other end of the guide tube 2331. The control element 233 is configured such that when the operating handle 232 pulls one end of the control line 2332, the self-locking switch 2313 is opened through the other end of the control line 2332.

[0035] Specifically, one end of the guide tube 2331 passes through the pusher unit 21 and connects to the operating handle 232. This creates a stable connection channel between the guide tube 2331 and the operating handle 232, providing a path for the control line 2332 to travel through. The other end of the guide tube 2331 connects to the connector 234, allowing the guide tube 2331 to connect to the movable end of the self-locking gas spring 231, thus providing a channel for the control line 2332 to extend to the self-locking switch 2313. The control line 2332, as a key component for the operating handle 232 to control the self-locking switch 2313, is connected at one end to the operating handle 232. When the user operates the operating handle 232, a force is directly applied to the end of the control line 2332. The other end of the control line 2332 passes through the guide tube 2331, extending to the end where the guide tube 2331 connects to the connector 234, and then connects to the self-locking switch 2313 located at the movable end of the self-locking gas spring 231. The guide tube 2331 serves to protect and guide the control line 2332, ensuring that the control line 2332 can accurately transmit the action of the operating handle 232 to the self-locking switch 2313.

[0036] In this optional embodiment, when the user wants to adjust the height of the crib, they operate the operating handle 232, pulling the control line 2332 connected to the operating handle 232. Since the control line 2332 is a continuous unit, the movement of one end is transmitted to the control line 2332 located at the other end of the guide tube 2331. At this time, the other end of the control line 2332 will apply force to the self-locking switch 2313 connected to it, thereby pulling open the self-locking switch 2313. When the self-locking switch 2313 is pulled open, the self-locking gas spring 231 changes from the locked state to the movable state. The piston rod 2312 can freely extend and retract within the cylinder, allowing the user to adjust the height of the crib according to their needs. When the appropriate height is reached, the operating handle 232 is released, the control line 2332 no longer applies tension to the self-locking switch 2313, the self-locking switch 2313 returns to the locked state, the gas spring locks again, and the crib is stabilized at the adjusted height. Users can easily control the locking and unlocking of the self-locking gas spring by operating the handle 232 on the pusher unit 21, without directly contacting the gas spring or other complex components, thus improving the convenience of adjusting the height of the crib. At the same time, the guide tube 2331 protects the control line 2332 from interference or damage from external factors during use, improving the overall stability and reliability of the crib.

[0037] Combination Figure 1 , 2As shown in Figure 4, optionally, the operating handle 232 includes an operating column 2321, a lifting adjustment component 2322, a connecting rod 2323, a fixing component 2324, and a fixing head 2325. The operating column 2321 has a through hole along its axial direction. One end of the operating column 2321 is connected to the upper surface of the pusher unit 21. The guide tube 2331 passes through the pusher unit 21 and is fixedly connected to the inner wall of the operating column 2321 through the fixing component 2324. Rectangular through holes are respectively provided at the relative positions of the side arms at the other end of the operating column 2321. The length direction of the rectangular through holes is the same as the axial direction of the operating column 2321. Both ends of the connecting rod 2323 pass through the rectangular through holes and are connected to the lifting adjustment component 2322 sleeved on the operating column 2321. One end of the control line 2332 is connected to the connecting rod 2323 located inside the operating column 2321 through the fixing head 2325.

[0038] In this optional embodiment, the operating handle mainly consists of an operating column 2321, a lifting adjustment component 2322, a connecting rod 2323, a fixing component 2324, and a fixing head 2325. The operating column 2321 has a through hole along the axial direction, and one end of it is firmly connected to the upper surface of the pusher unit 21, providing a stable support foundation for the entire operating handle 232. The fixing component 2324 can be a sleeve structure. The outer wall of the fixing component 2324 matches the inner wall of the operating column. The outer wall of the fixing component 2324 can be connected to the inner wall of the operating column 2321 through a threaded connection or other connection method. Similarly, the inner wall of the fixing component 2324 can be connected to the outer wall of the guide tube 2334 through a threaded connection or other connection method. That is, after the guide tube 2331 passes through the pusher unit 21, it is precisely connected to the fixing component 2324 inside the operating column 2321. Thus, the guide tube and the operating column are fixed by the fixing component 2324. The fixing of the fixing component 2324 establishes a stable and smooth passage path for the control line 2332. A rectangular through hole is provided at the relative position of the other side arm of the operating column 2321, and its length direction is consistent with the axial direction of the operating column 2321. This provides a clear guide for the movement of the connecting rod 2323, allowing the connecting rod 2323 to drive the control line 2332 connected to it to move along the axial direction of the operating column 2321. Both ends of the connecting rod 2323 pass through the two rectangular through holes and are connected to the lifting adjustment component 2322 sleeved on the operating column 2321. This allows the movement of the lifting adjustment component 2322 to be effectively transmitted to the connecting rod 2323, thus using the lifting adjustment component 2322 as the operating structure of the operating handle 232. By pulling up the lifting adjustment component 2322 on the operating handle 232, the self-locking switch 2313 of the self-locking gas spring 231 is opened, thereby adjusting the height of the crib. One end of the control line 2332 is fixedly connected to the connecting rod 2323 inside the operating column 2321 via the fixing head 2325. When the connecting rod 2323 moves due to the lifting adjustment component 2322, it smoothly pulls the control line 2332, causing it to move accordingly. This allows the control line located at one end of the self-locking gas spring 231 to control the self-locking switch 2313. Adjusting the height of the crib is straightforward; simply operate the height adjustment mechanism 2322 at the push handle unit 21 to easily unlock the self-locking gas spring and quickly adjust the crib height to meet the needs of different scenarios such as soothing to sleep and feeding. After adjustment, simply operate the mechanism again to lock the crib for safety. This allows parents to more conveniently adjust the crib's position and height as needed, bringing convenience to the childcare process and effectively reducing the burden on parents.

[0039] Combination Figures 1 to 3As shown, optionally, the self-locking gas spring 231 includes a cylinder body 2311, a piston rod 2312, and a self-locking switch 2313. The cylinder body 2311 is disposed on the machine foot assembly 3. One end of the piston rod 2312 is disposed inside the cylinder body 2311, extends out from the front end cover of the cylinder body 2311, and is connected to the connector 234. The self-locking switch 2313 is disposed at the end of the piston rod 2312 near the connector 234.

[0040] It should be noted that the common structure of a self-locking gas spring 231 includes a cylinder body 2311, a piston rod 2312, a self-locking switch 2313, a piston, and a guide sealing mechanism. The cylinder body 2311, as the basic component, is typically a sealed metal cylinder, which can be filled with high-pressure nitrogen and a small amount of lubricating oil to withstand internal pressure and provide space for the gas spring to operate. One end of the piston rod 2312 is connected to the piston, and the other end extends out of the cylinder body 2311. It is used to transmit the force generated by the extension and contraction of the gas spring and connect to an external load to achieve the corresponding action. The piston is located inside the cylinder body 2311, dividing the cylinder body 2311 into a rod-side chamber and a rodless chamber. The piston is equipped with a valve or throttle orifice to control the gas flow between the two chambers, realizing the extension, contraction, and locking functions of the gas spring. The self-locking switch 2313 is a lock body and locking element type. The lock body is fixed to the end of the cylinder 2311, and the locking element is connected to the piston rod 2312. The lock body has a guide rail, rotating teeth, locking groove and other structures. The locking element is equipped with a locking tongue. The two work together to achieve locking and unlocking. For example, the locking tongue changes direction by external force and falls into the locking groove when it rebounds to lock. The guide sealing mechanism guide sleeve is pressed against the lock body to guide the piston rod 2312 to slide along the cylinder 2311 axially. The sealing sleeve is placed in the groove of the guide sleeve and is interference-fitted with the guide sleeve to seal the piston rod 2312 and prevent gas leakage.

[0041] In this optional embodiment, the cylinder body 2311 is mounted on the foot assembly 3, which provides a stable support foundation for the entire self-locking gas spring 231. One end of the piston rod 2312, located inside the cylinder body 2311, extends from the front end cover of the cylinder body 2311 and connects to the connector 234, connecting the self-locking gas spring 231 to the pusher unit 21 via the connector 234. The self-locking switch 2313 of the self-locking gas spring 231 is located at the end of the piston rod 2312 near the connector 234, allowing for more precise and efficient control of the extension and retraction of the piston rod 2312 during operation.

[0042] Combination Figures 1 to 3As shown, optionally, the connector 234 includes a first connecting plate 2341 and a second connecting plate 2342. First side arms 2343 extend vertically from opposite sides of the first connecting plate 2341, and second side arms 2344 extend vertically from opposite sides of the second connecting plate 2342. The first side arms 2343 and the second side arms 2344 are rotatably connected. The bottom surface of the first connecting plate 2341 is connected to the bottom surface of the pusher unit 21, and the bottom surface of the second connecting plate 2342 is connected to the piston rod 2312. A first through hole is provided at a position corresponding to the piston rod 2312, and the diameter of the first through hole matches the diameter of the piston rod 2312. The self-locking switch 2313 is disposed between the first connecting plate 2341 and the second connecting plate 2342 and is connected to the piston rod 2312 through the first through hole.

[0043] In this optional embodiment, two symmetrical first side arms 2343 extend from opposite sides of the first connecting plate 2341 along a vertical direction (perpendicular to the first connecting plate 2341), and two symmetrical second side arms 2344 extend from opposite sides of the second connecting plate 2342 along a vertical direction (perpendicular to the second connecting plate 2342). The first side arms 2343 and the second side arms 2344 are rotatably connected, allowing the connecting member 234 to rotate flexibly. The bottom surface of the first connecting plate 2341 is connected to the bottom surface of the pusher unit 21, and the bottom surface of the second connecting plate 2342 is connected to one end of the piston rod 2312. Furthermore, a first through hole is provided on the second connecting plate 2342 at a position corresponding to the piston rod 2312. A self-locking switch 2313 is positioned between the first connecting plate 2341 and the second connecting plate 2342, and is connected to the piston rod 2312 through the first through hole, thereby precisely controlling the extension, retraction, and locking of the piston rod 2312.

[0044] Combination Figures 1 to 3 As shown, optionally, the bottom surface of the second connecting plate 2342 is connected to the other end of the guide tube 2331. The second connecting plate 2342 and the guide tube 2331 are provided with a second through hole at the corresponding position. The diameter of the second through hole matches the diameter of the guide tube 2331. The other end of the control line 2332 passes through the second through hole and is connected to the self-locking switch 2313.

[0045] In this optional embodiment, the bottom surface of the second connecting plate 2342 is securely connected to one end of the guide tube 2331, providing a reliable support base for the guide tube 2331. The second connecting plate 2342 is provided with a second through hole that precisely matches the diameter of the guide tube 2331, thus providing a channel for the control line 2332 to pass through and connect to the self-locking switch 2313. One end of the control line 2332 is connected to the operating handle 232, and the other end passes through the guide tube 2331 and connects to the self-locking switch 2313 located at the other end of the guide tube 2331. By wrapping and guiding the control line 2332 with the guide tube 2331, it is protected from damage by external forces, and the operating force is precisely transmitted to the self-locking switch 2313 along a fixed path.

[0046] Combination Figure 1 and 2 As shown, optionally, the pusher unit 21 includes a movable handle 211 and a fixed plate 212. The upper surface of the fixed plate 212 is connected to the other end of the swing arm 22, and the lower surface of the fixed plate 212 is connected to the movable end of the lifting unit 23. The movable handle 211 is located on the side of the fixed plate 212 away from the bed assembly 1.

[0047] In this optional embodiment, the upper surface of the fixed plate 212 of the pusher unit 21 is connected to the other end of the swing arm 22, and the lower surface is connected to the movable end of the lifting unit 23, so that the height of the crib assembly 1 mounted on the swing arm 22 can be adjusted by moving the movable end. The moving handle 211 is located on the side of the fixed plate 212 away from the crib assembly 1 to conform to ergonomic design, avoid being disturbed by the crib assembly 1 during movement, and facilitate the control of the crib's movement via the moving handle 211.

[0048] Combination Figure 5 As shown, optionally, the crib also includes a first lifting cover 4 and a second lifting cover 5. The first lifting cover 4 is fitted onto the lifting assembly 2, and the bottom end of the first lifting cover 4 is fixedly connected to the foot assembly 3. The second lifting cover 5 is fitted onto the first lifting cover 4, and the top end of the second lifting cover 5 is fixedly connected to the bottom surface of the pusher unit 21.

[0049] In this optional embodiment, the first lifting cover 4 is a hollow cylinder, tightly fitted over the lifting assembly 2, with its bottom end fixedly connected to the foot assembly 3. The second lifting cover 5 is fitted over the first lifting cover 4, with its top end fixed to the bottom surface of the pusher unit 21. When the lifting assembly 2 is operated to adjust the height of the crib, the pusher unit 21 drives the second lifting cover 5 to slide smoothly along the outer wall of the first lifting cover 4. Through the nesting and linkage of the first and second lifting covers 4 and 5, the smooth operation of the internal structure is ensured, and the mechanical parts are cleverly hidden, forming a smooth and safe lifting process. The double-layer protective structure effectively resists dust and moisture, reduces wear and tear and malfunctions of the lifting assembly 2, and ensures that the crib is always in good working order. During height adjustment, the smooth sliding of the second lifting cover 5 makes operation easier, allowing the crib to be quickly adjusted to the appropriate height. Furthermore, the tight protection and stable connection of the first and second lifting covers 4 and 5 prevents sharp parts from being exposed, and even if a collision occurs during movement, the integrity of the crib structure can be effectively protected, making it safer and more convenient for parents to use.

[0050] Combination Figure 1 As shown, the crib may optionally include casters 6, which are disposed at the bottom of the foot assembly 3.

[0051] In this optional embodiment, by placing the casters 6 at the bottom of the foot assembly 3, the crib can rotate freely 360 degrees in the horizontal direction, making it easy to push in a straight line or turn around in narrow indoor spaces. At the same time, the rolling friction of the casters 6 is much less than the sliding friction, which greatly reduces the pushing force required for movement, so even parents with less strength can push the crib effortlessly.

[0052] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A height-adjustable crib, characterized in that, The device includes a bed frame assembly (1), a lifting assembly (2), and a foot assembly (3). The lifting assembly (2) includes a pusher unit (21), a swing arm (22), and a lifting unit (23). One end of the swing arm (22) is connected to the bed frame assembly (1) to support the bed frame assembly (1). The other end of the swing arm (22) is connected to the movable end of the lifting unit (23) through the pusher unit (21). The fixed end of the lifting unit (23) is located on the foot assembly (3).

2. The height-adjustable crib according to claim 1, characterized in that, The lifting unit (23) includes a self-locking gas spring (231), an operating handle (232), a control component (233), and a connecting component (234). The fixed end of the self-locking gas spring (231) is disposed on the machine foot assembly (3). The movable end of the self-locking gas spring (231) is connected to the bottom surface of the pusher unit (21) through the connecting component (234). The operating handle (232) is disposed on the pusher unit (21). The operating handle (232) is connected to the self-locking switch (2313) of the self-locking gas spring (231) through the control component (233). The axial direction of the self-locking gas spring (231) is parallel to the vertical direction.

3. The height-adjustable crib according to claim 2, characterized in that, The control element (233) includes a guide tube (2331) and a control line (2332). One end of the guide tube (2331) passes through the pusher unit (21) and is connected to the operating handle (232). The other end of the guide tube (2331) is connected to the connector (234). One end of the control line (2332) is connected to the operating handle (232). The other end of the control line (2332) passes through the guide tube (2331) and is connected to the self-locking switch (2313) located at the other end of the guide tube (2331). The control element (233) is configured to open the self-locking switch (2313) through the other end of the control line (2332) when the operating handle (232) pulls one end of the control line (2332).

4. The height-adjustable crib according to claim 3, characterized in that, The operating handle (232) includes an operating column (2321), a lifting adjustment component (2322), a connecting rod (2323), a fixing component (2324), and a fixing head (2325). The operating column (2321) has a through hole along its axial direction. One end of the operating column (2321) is connected to the upper surface of the pusher unit (21). The guide tube (2331) passes through the pusher unit (21) and is fixedly connected to the inner wall of the operating column (2321) through the fixing component (2324). Rectangular through holes are provided at the relative positions of the side arms at the other end of the operating column (2321). The length direction of the rectangular through holes is the same as the axial direction of the operating column (2321). The two ends of the connecting rod (2323) pass through the rectangular through holes and are connected to the lifting adjustment component (2322) sleeved on the operating column (2321). One end of the control line (2332) is connected to the connecting rod (2323) located inside the operating column (2321) through the fixing head (2325).

5. The height-adjustable crib according to claim 3, characterized in that, The self-locking gas spring (231) includes a cylinder (2311), a piston rod (2312), and a self-locking switch (2313). The cylinder (2311) is mounted on the machine foot assembly (3). The piston rod (2312) is mounted inside the cylinder (2311). One end of the piston rod (2312) extends from the front end cover of the cylinder (2311) and connects to the connector (234). The self-locking switch (2313) is located at the end of the piston rod (2312) near the connector (234).

6. The height-adjustable crib according to claim 5, characterized in that, The connector (234) includes a first connecting plate (2341) and a second connecting plate (2342). First side arms (2343) extend vertically from opposite sides of the first connecting plate (2341), and second side arms (2344) extend vertically from opposite sides of the second connecting plate (2342). The first side arms (2343) and the second side arms (2344) are rotatably connected. The bottom surface of the first connecting plate (2341) is connected to the pusher unit (21). The bottom surface of the first connecting plate (2341) is connected to the bottom surface of the second connecting plate (2342), and the bottom surface of the second connecting plate (2342) is connected to one end of the piston rod (2312). The second connecting plate (2342) and the piston rod (2312) are provided with a first through hole at the corresponding positions. The diameter of the first through hole matches the diameter of the piston rod (2312). The self-locking switch (2313) is disposed between the first connecting plate (2341) and the second connecting plate (2342), and is connected to the piston rod (2312) through the first through hole.

7. The height-adjustable crib according to claim 6, characterized in that, The bottom surface of the second connecting plate (2342) is connected to the other end of the guide tube (2331). The second connecting plate (2342) and the guide tube (2331) are provided with a second through hole at the corresponding positions. The diameter of the second through hole matches the diameter of the guide tube (2331). The other end of the control line (2332) passes through the second through hole and is connected to the self-locking switch (2313).

8. The height-adjustable crib according to claim 1, characterized in that, The pusher unit (21) includes a movable handle (211) and a fixed plate (212). The upper surface of the fixed plate (212) is connected to the other end of the swing arm (22), and the lower surface of the fixed plate (212) is connected to the movable end of the lifting unit (23). The movable handle (211) is located on the side of the fixed plate (212) away from the bed assembly (1).

9. The height-adjustable crib according to claim 1, characterized in that, It also includes a first lifting cover (4) and a second lifting cover (5). The first lifting cover (4) is fitted on the lifting assembly (2). The bottom end of the first lifting cover (4) is fixedly connected to the machine foot assembly (3). The second lifting cover (5) is fitted on the first lifting cover (4). The top end of the second lifting cover (5) is fixedly connected to the bottom surface of the pusher unit (21).

10. The height-adjustable crib according to claim 1, characterized in that, It also includes casters (6), which are located at the bottom of the foot assembly (3).

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