Crib

Abstract

A crib, comprising vertical rods (10), upper rails (20), lower support rods (30), locking members (40), and linkage mechanisms (50). The upper rails (20) and the lower support rods (30) both have an unfolded state and a folded state, and the locking members (40) are movably arranged on the upper rails (20) and limit and lock the upper rails (20) in the unfolded states when moved to locking positions; each linkage mechanism (50) comprises a traction assembly (51) and a linkage rod assembly (52), and the traction assemblies (51) are movably provided on the vertical rods (10) and are engaged with the lower support rods (30), so that when the lower support rods (30) are rotatably folded towards the vertical rods (10), the traction assemblies (51) are driven to move along the vertical rods (10); the linkage rod assemblies (52) are movably arranged on the upper rails (20) and are in abutting transmission engagement with the traction assemblies (51), and the linkage rod assemblies (52) are also engaged with the locking members (40), so that when the linkage rod assemblies (52) are driven by the traction assemblies (51) by means of abutment, the locking members (40) are driven to move towards unlocking positions. The folding process of the crib is simplified, thereby improving the convenience of use of the crib.

Description

children's bed Related applications

[0001] This application claims priority to Chinese patent application No. CN2024110454324, filed on July 31, 2024, and Chinese patent application No. CN2024117464365, filed on November 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of children's products technology, and in particular to a children's bed. Background Technology

[0003] Foldable children's beds are favored for their compact structure when folded, making them easy to carry. However, the folding process for these beds requires unlocking and folding each component sequentially, making it rather cumbersome. Summary of the Invention

[0004] The main objective of this disclosure is to provide a children's bed that simplifies the folding process to improve the ease of use of the children's bed.

[0005] To achieve the above objectives, the children's bed disclosed herein includes a support post, an upper railing located at the upper end of the support post, a lower support post located at the lower end of the support post, a locking element, and a linkage mechanism;

[0006] Both the upper fence and the lower support rod have an unfolded state and a folded state. The locking member is movably disposed on the upper fence and limits and locks the upper fence in the unfolded state when it is moved to the locking position.

[0007] The linkage mechanism includes a traction component and a connecting rod component. The traction component is movably disposed on the upright and cooperates with the lower support rod so that when the lower support rod rotates and folds toward the upright, it drives the traction component to move along the upright.

[0008] The linkage assembly is movably mounted on the upper fence and engages with the traction assembly for transmission. The linkage assembly also engages with the locking member so that when the linkage assembly is engaged by the traction assembly, it drives the locking member to move toward the unlocking position.

[0009] Optionally, when the lower support rod rotates and folds toward the upright to move the traction assembly along the upright, the traction assembly pushes the connecting rod assembly so that the connecting rod assembly moves the locking member toward the unlocking position;

[0010] The traction assembly is provided with a groove, the groove wall includes an abutting guide surface, and the connecting rod assembly is provided with a protrusion.

[0011] When the locking member is in the locking position, the protrusion is inserted into the groove;

[0012] When the lower support rod rotates and folds toward the upright, causing the traction assembly to move along the upright, the abutting guide surface slides relative to the protrusion, thereby driving the protrusion to move away from the groove and causing the connecting rod assembly to move the locking member to the unlocked position.

[0013] Optionally, the abutting guide surface extends obliquely and is inclined downwards, and the protruding post has a mating surface that matches and abuts the abutting guide surface.

[0014] When the lower support rod rotates and folds toward the upright, causing the traction assembly to move downwards on the upright, the abutting guide surface slides relative to the mating surface, thereby driving the protrusion to move and disengage from the groove.

[0015] Optionally, the upper fence includes a connecting seat and two rails rotatably mounted on opposite sides of the connecting seat, the locking member is movably disposed on the rails, and the connecting seat is provided with a locking groove that cooperates with the locking member;

[0016] In the locked position, the locking member is positioned in the locking groove to restrict the relative rotation of the railing and the connecting seat; in the unlocked position, the locking member disengages from the locking groove, and the railing can rotate and fold towards the upright.

[0017] Optionally, the locking member is slidably disposed along the extension direction of the railing and has a sliding pin protruding from the railing, the sliding pin being slidably disposed within the locking groove;

[0018] The connecting seat also has a sliding clearance groove, and when the surrounding rod rotates relative to the upright rod, the sliding pin slides along the sliding clearance groove.

[0019] Optionally, the children's bed also has a diagonal support rod, which is supported between the upright and the surrounding rod in the unfolded state;

[0020] The diagonal support rod is movably connected to the upright and the surrounding rod respectively, so that when the surrounding rod moves towards the upright and folds up, the diagonal support rod is driven to fold between the surrounding rod and the upright;

[0021] One end of the inclined support rod is rotatably connected to the surrounding rod, and the other end of the inclined support rod is slidably disposed relative to the upright rod and rotatably disposed relative to the upright rod;

[0022] The upright is provided with an upper sliding member that is slidably disposed along the extension direction of the upright, and the end of the inclined support rod away from the surrounding rod is rotatably mounted on the upper sliding member;

[0023] The upper sliding component is an upper sliding sleeve fitted outside the upright.

[0024] Optionally, the traction assembly cooperates with the upper sliding member to drive the upper sliding member to move as the traction assembly moves downward along the upright to pull the surrounding pole to rotate and fold in the direction of approaching the upright;

[0025] When the traction assembly moves downward along the upright, the traction assembly first drives the connecting rod assembly to move to unlock the locking member, at which time the traction assembly slides relative to the upper sliding member;

[0026] After the traction component moves along the upright to unlock the locking member, the traction component abuts against the upper sliding member and drives the upper sliding member to move synchronously.

[0027] Optionally, the traction component assembly includes a traction component and an upper seat, the traction component extending along the extension direction of the upright, the upper seat being slidably disposed within the upright and having the groove provided therein;

[0028] The upper seat is provided with a drive pin, which extends outside the upright and slides with the upright. After the drive pin moves to abut against the upper sliding member, it drives the upper sliding member to move.

[0029] Optionally, the upright is provided with a lower sliding member that is slidably disposed along the extension direction of the upright, and the lower support rod includes a top support rod and a bottom support rod disposed side by side at intervals, and the ends of the top support rod and the bottom support rod near the upright are rotatably connected to the lower sliding member;

[0030] The children's bed also has a connecting rod, one end of which is rotatably connected to the upright and the other end is rotatably connected to the top support rod. The joint between the connecting rod and the upright is located above the lower sliding member, and the joint between the top support rod and the connecting rod is farther away from the upright than the joint between the top support rod and the lower sliding member.

[0031] The traction component cooperates with the lower sliding member so that when the lower support rod folds and approaches the upright, it drives the lower sliding member to slide, thereby pulling the traction component to move.

[0032] Optionally, the upright is provided with a lower sliding member that is slidably disposed along the extension direction of the upright, and a fixing seat fixed on the upright, wherein the fixing seat is located below the lower sliding member;

[0033] The lower support rod is rotatably connected to the lower sliding member at one end near the upright rod.

[0034] The children's bed also has a connecting rod, one end of which is rotatably connected to the lower sliding member and the other end is rotatably connected to the lower support rod. The engagement position of the lower support rod and the fixed seat is farther away from the upright than the engagement position of the lower support rod and the connecting rod.

[0035] The traction component cooperates with the lower sliding member so that when the lower support rod folds and approaches the upright, it drives the lower sliding member to slide, thereby pulling the traction component to move.

[0036] In the use of the children's bed disclosed in this invention, when the user drives the lower support rod of the children's bed to rotate and fold towards the upright rod, the traction component in the linkage mechanism can be moved along the extension direction of the upright rod. During the movement of the traction component along the upright rod, it can also abut against and drive the connecting rod component, which in turn drives the locking element to the unlocked position, thereby releasing the limit lock on the upper railing so that the upper railing can also rotate and fold towards the upright rod. Therefore, the structural design of the children's bed in this solution allows for the simultaneous unlocking of the upper railing during the rotation and folding of the lower support rod. This eliminates the need for cumbersome step-by-step unlocking operations on the lower support rod and upper railing, simplifying the folding process and improving the convenience of using the children's bed. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments or related technologies of this disclosure, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0038] Figure 1 is a structural schematic diagram of an embodiment of the children's bed disclosed herein;

[0039] Figure 2 is a schematic diagram of the folding process of the children's bed in Figure 1;

[0040] Figure 3 is a schematic diagram of the children's bed in Figure 1 in a folded state;

[0041] Figure 4 is a schematic diagram of the children's bed in Figure 1 from another perspective;

[0042] Figure 5 is a cross-sectional view of the children's bed in Figure 4;

[0043] Figure 6 is a magnified view of part A in Figure 5;

[0044] Figure 7 is a structural schematic diagram of another embodiment of the children's bed disclosed herein;

[0045] Figure 8 is a schematic diagram of the folding process of the children's bed in Figure 7;

[0046] Figure 9 is a schematic diagram of the children's bed in Figure 7 in a folded state;

[0047] Figure 10 is a schematic diagram of the children's bed in Figure 7 from another perspective;

[0048] Figure 11 is a cross-sectional view of the children's bed in Figure 10;

[0049] Figure 12 is a structural schematic diagram of yet another embodiment of the children's bed disclosed herein;

[0050] Figure 13 is a partial structural diagram of the children's bed in Figure 12 in a folded state;

[0051] Figure 14 is a cross-sectional view of the children's bed in Figure 13;

[0052] Figure 15 is a magnified view of part B in Figure 14;

[0053] Figure 16 is a partial structural schematic diagram of another embodiment of the children's bed of this disclosure in a folded state;

[0054] Figure 17 is a cross-sectional view of Figure 16;

[0055] Figure 18 is a magnified view of part C in Figure 17.

[0056] Explanation of icon numbers:

[0057] 100. Children's bed; 10. Upright post; 11. Upper sliding part; 111. Upper sliding sleeve; 12. Lower sliding part; 121. Lower sliding sleeve; 13. Fixed seat; 14. First upright post; 141. Rolling part; 20. Upper railing; 21. Connecting seat; 211. Locking groove; 212. Sliding clearance groove; 22. Enclosure post; 221. Stop seat; 222. Elastic element; 30. Lower support rod; 31. Top support rod; 32. Bottom support 40. Rod; 41. Locking element; 50. Sliding pin; 51. Linkage mechanism; 51. Traction assembly; 511. Groove; 511a. Abutment guide surface; 512. Traction element; 513. Upper seat; 514. Lower seat; 52. Linkage assembly; 521. Protruding post; 521a. Mating surface; 522. Linkage rod; 523. Limiting seat; 60. Diagonal support rod; 70. Connecting rod; 80. Angle connector; 90. Base.

[0058] The realization of the purpose, functional features and advantages of this disclosure will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0060] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0061] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0062] Referring to Figures 1 to 5, this application proposes a children's bed, including a support post 10, an upper railing 20 located at the upper end of the support post 10, a lower support rod 30 located at the lower end of the support post 10, a locking member 40, and a linkage mechanism 50. Both the upper railing 20 and the lower support rod 30 have an unfolded state and a folded state. The locking member 40 is movably disposed on the upper railing 20 and, when moved to the locking position, limits and locks the upper railing 20 in the unfolded state. The linkage mechanism 50 includes a traction component 51 and a connecting rod component 52. The traction component 51 is movably disposed on the support post 10 and engages with the lower support rod 30, so that when the lower support rod 30 rotates and folds towards the support post 10, it drives the traction component 51 to move along the support post 10. The connecting rod component 52 is movably disposed on the upper railing 20 and engages with the traction component 51 in a transmission connection. The connecting rod component 52 also engages with the locking member 40, so that when the connecting rod component 52 is engaged by the traction component 51, it drives the locking member 40 to move towards the unlocked position.

[0063] The upright post 10 extends vertically when the children's bed 100 is in normal use. The cross-section of the upright post 10 on the horizontal projection plane can be circular, square, or rectangular, etc. Furthermore, there can be multiple upright posts 10, spaced apart horizontally. The lines connecting adjacent upright posts 10 are sequentially connected to form a closed loop. For example, when there are four upright posts 10, the lines connecting adjacent upright posts 10 are sequentially connected to form a square or rectangle.

[0064] The upper railing 20 is disposed at the upper end of the upright 10. It can extend horizontally or be slightly inclined (e.g., forming an angle of less than or equal to 10° with the horizontal) and can be located between two adjacent uprights 10. The number of upper railings 20 corresponds to the number of uprights 10. For example, when there are four uprights 10, there can also be four upper railings 20, each upper railing 20 located between two adjacent uprights 10. In addition, to facilitate the upper railings 20 to have both an unfolded and folded state, each upper railing 20 can include a connecting seat 21 and two side rods 22. The two side rods 22 are rotatably mounted on opposite sides of the connecting seat 21, and the end of the side rod 22 away from the connecting seat 21 can be rotatably connected to the corresponding upright 10. In the unfolded state, the two side rods 22 can form a flat angle or a near flat angle. In the folded state, the two side rods 22 can form an acute angle. Of course, in other embodiments, each upper railing 20 may not include a connecting seat 21, in which case the ends of the two side rods 22 that are close to each other can be directly rotatably connected. Furthermore, when the upper railing 20 is folded, the railing rods 22 can rotate and fold towards the uprights 10, or the ends of the two railing rods 22 that are close together can rotate and fold downwards. This allows the ends of the two upper railing rods 22 in the upper railing 20 to rotate and fold under gravity, thus improving the convenience of folding the children's bed 100. On the other hand, it also allows the rotation and folding direction of the railing rods 22 to be opposite to the rotation and folding direction of the lower support rods 30, thereby improving the compactness of the children's bed 100 after folding. In addition, the railing rods 22 and the uprights 10 can also be directly rotatably connected. Alternatively, an angle connector 80 can be provided between the uprights 10 and the two adjacent railing rods 22, with the uprights 10 and the two adjacent railing rods 22 respectively rotatably connected to the angle connector 80, thus achieving an indirect rotatable connection between the railing rods 22 and the uprights 10. At this point, the corner connector 80 facilitates the connection, enabling a rotatable connection between the upright 10 and the two adjacent railings 22. Furthermore, it should be noted that the rotatable connection proposed in this application can be achieved by one of the connected objects having a pivot, and the other having a pivot hole, with the pivot inserted into the pivot hole to achieve the rotatable connection. Alternatively, both connected objects can have pivot holes, and the rotatable connection can be achieved directly by inserting a pivot. That is, this application does not limit the connection method of the rotatable connection mentioned. In addition, in a cross-section perpendicular to the extension direction of the railing 22, the cross-section of the railing 22 can be circular, or it can be square or rectangular, etc.

[0065] The lower support rod 30, located at the lower end of the upright 10, can extend horizontally or be slightly inclined (e.g., forming an angle of less than or equal to 10° with the horizontal), and can be positioned between two diagonally opposite uprights 10. The number of lower support rods 30 corresponds to the number of uprights 10. For example, when there are four uprights 10, there can be four lower support rods 30, with each pair of lower support rods 30 positioned between two diagonally opposite uprights 10. Furthermore, to facilitate both extended and folded states of the lower support rod 30, the ends of the lower support rods 30 that are close together can be rotatably mounted on the base 90, while the ends that are far apart can be directly or indirectly rotatably mounted on the corresponding upright 10. The base 90 provides a convenient connection point for rotatably mounting the lower support rod 30. Simultaneously, multiple lower support rods 30 can be rotatably connected using a single base 90, simplifying the number of components and the structure, and also allowing multiple lower support rods 30 to be positioned at the same height. In the unfolded state, the two opposing lower support rods 30 can form a flat angle or a near-flat angle. In the folded state, the two opposing lower support rods 30 can form an acute angle. Furthermore, when the lower support rods 30 are folded, they can rotate and fold towards the upright rod 10, or they can rotate and fold upwards at the ends closest to each other. Additionally, if no locking structure is provided between the lower support rods 30 and the upright rod 10 to lock them in the unfolded state, the lower support rods 30 can be unfolded by the gravity of the base 90, thus opening the upright rod 10. Alternatively, a locking structure including an elastic glass bead can be provided between the lower support rods 30 and the upright rod 10. This elastic glass bead can be placed in one of the lower support rods 30 and the upright rod 10, and can elastically extend and insert into the other to lock the lower support rods 30 and the upright rod 10 in the unfolded state. When the base 90 is lifted, the elastic glass beads can be driven to contract, thereby unlocking the lower support rod 30 and the upright rod 10, allowing them to be brought together and folded.

[0066] The locking element 40 is movably mounted on at least one rail 22 in the upper fence 20 and has a locked position and an unlocked position when moving relative to the rail 22. Specifically, the locking element 40 can lock the upper fence 20 in the unfolded state by engaging with the locking groove 211 in the upper fence 20, as described below, to restrict the rotation of the two rails 22 relative to the connecting seat 21, thereby achieving a limiting lock on the upper fence 21 in the unfolded state. Alternatively, the locking element 40 can be movably mounted on one of the two rails 22 in the upper fence 20, and the other rail 22 can be provided with a slot. When the two rails rotate to the unfolded state, the locking element 40 can be moved and inserted into the slot, thereby restricting the relative rotation between the two rails 22. Therefore, this application does not limit the locking method of the locking member 40 to the upper fence 20 in the unfolded state, as long as the locking member 40 can prevent the relative rotation of the two rails 22 in the upper fence 20 when it moves to the locked position; and the two rails 22 in the upper fence 20 can rotate relative to each other when the locking member 40 moves to the unlocked position. In addition, the locking member 40 can be slidably or rotated on the upper fence 20.

[0067] The linkage mechanism 50, when the lower support rod 30 rotates and folds towards the upright rod 10, receives the drive of the lower support rod 30's rotation and folding via the traction component 51, then abuts against and drives the connecting rod component 52, which in turn moves the locking member 40 from the locked position to the unlocked position. This achieves simultaneous unlocking of the upper fence 20 while the lower support rod 30 is folded and folded. The traction component 51 can be located on the outside or inside of the upright rod 10. Furthermore, when the lower support rod 30 rotates and folds towards the upright rod 10, the traction component 51 can slide downwards or upwards driven by the lower support rod 30. Additionally, when the lower support rod 30 rotates and folds towards the upright rod 10, the lower support rod 30 can drive the traction component 51 through the cooperation of the downward sliding member 12 and the connecting rod 70, as described below. Alternatively, the lower support rod 30 can abut against and drive the traction component 51. Therefore, this application does not limit the driving method of the lower support rod 30 to the traction component 51. Furthermore, the connecting rod assembly 52 can be located on the outside of the railing 22 in the upper railing 20, or it can be located on the inside of the railing 22. In addition, the locking member 40 can be connected to the connecting rod assembly 52, so that when the connecting rod assembly 52 is abutted and driven by the traction component 51, the locking member 40 can move along with the connecting rod assembly 52. ​​This improves the stability of the driving of the locking member 40 by the connecting rod assembly 52 and facilitates the installation and arrangement of both, thereby improving the manufacturing convenience of the children's bed 100. Of course, the connecting rod assembly 52 and the locking member 40 can also be configured as an abutment-driven engagement. That is, the connecting rod assembly 52 can abut and drive the locking member 40 when it moves.

[0068] In the technical solution of this application, when the user drives the lower support rod 30 of the children's bed 100 to rotate and fold towards the upright rod 10, the traction component 51 in the linkage mechanism 50 can be moved along the extension direction of the upright rod 10. During the movement of the traction component 51 along the upright rod 10, it can also abut against and drive the connecting rod component 52, thereby moving the locking member 40 to the unlocked position, thus releasing the limiting lock on the upper railing 20, allowing the upper railing 20 to also rotate and fold towards the upright rod 10. Therefore, the structural design of the children's bed 100 in this solution enables the upper railing 20 to be unlocked simultaneously during the rotation and folding of the lower support rod 30. This eliminates the need for a cumbersome step-by-step unlocking operation of the lower support rod 30 and the upper railing 20, simplifying the folding process of the children's bed 100 and improving its ease of use. Moreover, the linkage mechanism 50 at this time can improve the stability of the transmission by transmitting power through the rigid traction component 51 and the connecting rod component 52 on the upright 10 and the upper fence 20 respectively, which in turn helps to improve the stability and accuracy of unlocking the upper fence 20.

[0069] Referring to Figures 5 and 6, in one embodiment of this application, when the lower support rod 30 rotates and folds toward the upright rod 10, causing the traction assembly 51 to move along the upright rod 10, the traction assembly 51 pushes the connecting rod assembly 52, so that the connecting rod assembly 52 drives the locking member 40 to move toward the unlocked position; the traction assembly 51 is provided with a groove 511, the groove wall of the groove 511 includes an abutting guide surface 511a, and the connecting rod assembly 52 is provided with a protrusion 521; when the locking member 40 is in the locked position, the protrusion 521 is inserted into the groove 511; when the lower support rod 30 rotates and folds toward the upright rod 10, causing the traction assembly 51 to move along the upright rod 10, the abutting guide surface 511a slides relative to the protrusion 521, so as to drive the protrusion 521 to move away from the groove 511, so that the connecting rod assembly 52 drives the locking member 40 to move to the unlocked position.

[0070] In this embodiment, when the lower support rod 30 rotates and folds toward the upright rod 10, it can drive the traction assembly 51 to move. At this time, the guide surface 511a can abut against the pressing protrusion 521, thereby driving the protrusion 521 to move away from the groove 511, so as to realize the abutment and drive of the traction assembly 51 on the connecting rod assembly 52. ​​Grooves 511 and protrusions 521 are respectively provided on the traction assembly 51 and the connecting rod assembly 52, so that when the children's bed 100 is in the unfolded state, the insertion and cooperation of the grooves 511 and protrusions 521 can provide relatively stable limiting for the traction assembly 51 and the connecting rod assembly 52, thereby improving the stability of the linkage mechanism 50 and the stability of the children's bed 100 in use. Furthermore, the abutment guide surface 511a can be a sloped surface or an arc surface. In addition, in order to improve the compactness of the linkage mechanism 50 distribution, in the unfolded state, that is, when the connecting rod assembly 52 is in the locked position, the abutment guide surface 511a can abut against the protrusion 521. Additionally, it should be noted that in other embodiments, the traction component 51 may be provided with a protrusion, and the abutment guide surface 511a and the protrusion 521 are formed on the protrusion for abutment transmission cooperation.

[0071] Referring to Figures 5 and 6, in one embodiment of this application, the abutting guide surface 511a extends obliquely and is inclined downward. The protrusion 521 is provided with a mating surface 521a that is adapted to abut the abutting guide surface 511a. When the lower support rod 30 rotates and folds toward the upright rod 10, causing the traction component 51 to move downward on the upright rod 10, the abutting guide surface 511a and the mating surface 521a slide relative to each other, thereby driving the protrusion 521 to move and disengage from the groove 511.

[0072] In this embodiment, the abutment guide surface 511a is set as a downward-facing inclined surface, so that the traction component 51 can be configured to be driven downward by the rotation and folding of the lower support rod 30 toward the upright rod 10. This facilitates the rotation and folding of the lower support rod 30 toward the upright rod 10 to drive the traction component 51, and also eliminates the need for an upward movement space for the traction component 51 at the upper end of the upright rod 10, thereby reducing the required height of the upright rod 10 and the overall volume of the children's bed 100. Furthermore, the abutment guide surface 511a is relatively regular, which improves the ease of manufacturing the children's bed 100. The mating surface 521a improves the stability of the mating between the traction component 51 and the connecting rod component 52, thus enhancing the stability of the traction component 51 driving the connecting rod component 52.

[0073] Referring to Figures 5 and 6, in one embodiment of this application, the locking member 40 is movably disposed on the surrounding rod 22, and the connecting seat 21 is provided with a locking groove 211 that cooperates with the locking member 40; in the locked position, the locking member 40 is positioned in the locking groove 211 to restrict the relative rotation between the surrounding rod 22 and the connecting seat 21; in the unlocked position, the locking member 40 disengages from the locking groove 211, and the surrounding rod 22 can rotate and fold towards the upright rod 10.

[0074] In this embodiment, the upper railing 20 in its unfolded state is locked and unlocked by the engagement and disengagement of the locking member 40 and the locking groove 211. This simplifies the locking structure of the upper railing 20 in its unfolded state, thereby improving the convenience of unlocking the upper railing 20 and the ease of manufacturing the children's bed 100. Furthermore, by movably mounting the locking member 40 on the railing 22 and the locking groove 211 on the connecting seat 21, corresponding mounting spaces are readily available for different components. The locking groove 211 can extend linearly along the sliding direction of the locking member 40.

[0075] Referring to Figures 2, 3, and 5, in one embodiment of this application, the locking member 40 is slidably disposed along the extension direction of the surrounding rod 22 and has a sliding pin 41 that protrudes from the surrounding rod 22 in the radial direction. The sliding pin 41 is slidably disposed in the locking groove 211. The connecting seat 21 also has a sliding clearance groove 212. When the surrounding rod 22 rotates relative to the upright rod 10, the sliding pin 41 slides along the sliding clearance groove 212.

[0076] In this embodiment, the sliding engagement of the sliding pin 41 and the sliding clearance groove 212 facilitates stable movement of the locking member 40, thereby improving the stability of locking and unlocking the upper fence 20. The sliding clearance groove 212 can be arc-shaped and connected at one end to the lock groove 211.

[0077] Referring to Figures 1 to 5, in one embodiment of this application, the children's bed further includes an inclined support rod 60. In the unfolded state, the inclined support rod 60 is supported between the upright rod 10 and the surrounding rod 22. The inclined support rod 60 is movably connected to both the upright rod 10 and the surrounding rod 22, so that when the surrounding rod 22 is folded towards the upright rod 10, the inclined support rod 60 is folded between the surrounding rod 22 and the upright rod 10. One end of the inclined support rod 60 is rotatably connected to the surrounding rod 22, and the other end of the inclined support rod 60 is slidably connected to the upright rod 10 and is rotatably arranged relative to the upright rod 10. An upper sliding member 11 is provided on the upright rod 10 and is slidably arranged along the extension direction of the upright rod 10. The end of the inclined support rod 60 away from the surrounding rod 22 is rotatably mounted on the upper sliding member 11. The upper sliding member 11 is an upper sliding sleeve 111 sleeved outside the upright rod 10.

[0078] In this embodiment, the inclined support rod 60 and the upper sliding member 11 are provided so that when the children's bed 100 is in the unfolded state, the inclined support rod 60 can support the upper railing 20, thereby improving the overall stability of the children's bed 100. The inclined support rod 60 can be a linear rod; it can also include two linear rods arranged at an angle, or further include an arc-shaped segment between two linear rods arranged at an angle, or a single arc-shaped rod, with the opening of the angle formed by the inclined support rod 60 facing away from the joint between the upright 10 and the railing 22. This configuration of the inclined support rod 60 facilitates rotation under force, allowing the railing 22 and the upright 10 to fold together. Furthermore, one inclined support rod 60 can be provided between each upright 10 and each railing 22, or two inclined support rods 60 can be provided. In this case, the two inclined support rods 60 can be arranged opposite each other and located on both sides of the railing 22 to improve the stability of the connection. In addition, setting the upper sliding member 11 as an upper sliding sleeve 111 sleeved outside the upright 10 can simplify the installation of both, and also allow the upright 10 to guide the sliding of the upper sliding member 11, thereby further improving the stability of the movement.

[0079] Referring to Figures 1 to 3, in one embodiment of this application, the traction component 51 cooperates with the upper sliding member 11 to drive the upper sliding member 11 to move as the traction component 51 moves downward along the upright 10, thereby pulling the surrounding rod 22 to rotate and fold in the direction of approaching the upright 10.

[0080] In this embodiment, the traction component 51 and the upper sliding member 11 are designed to work together. When the traction component 51 moves downwards along the upright 10, the movement of the upper sliding member 11 and the diagonal support rod 60 pulls the railing 22 towards the upright 10, causing it to rotate and fold. This improves the convenience of folding the upper railing 20 and enhances the folding effect of the upper railing 20 towards the upright 10. Specifically, when the traction component 51 moves downwards along the upright 10, it first drives the connecting rod component 52 to unlock the locking member 40. At this time, the traction component 51 slides relative to the upper sliding member 11. After the traction component 51 moves along the upright 10 to the unlocking locking member 40, it abuts against the upper sliding member 11 and drives it to move synchronously. This ensures that unlocking and folding the upper railing 20 does not interfere with each other, improving the reliability of folding the children's bed 100.

[0081] Referring to Figures 5 and 6, in one embodiment of this application, the traction component assembly 51 includes a traction component 512 and an upper seat 513. The traction component 512 extends along the extension direction of the upright 10, and the upper seat 513 is slidably disposed within the upright 10 and is provided with a groove 511. A drive pin is provided on the upper seat 513. The drive pin extends outside the upright 10 and is slidably disposed with the upright 10. After the drive pin moves to abut against the upper sliding component 11, it drives the upper sliding component 11 to move.

[0082] In this embodiment, the traction component assembly 51 is configured to include a traction component 512 and an upper seat 513, allowing for convenient placement of the groove 513 structure via the upper seat 513. The traction component 512 extends the distance, enabling transmission between the traction component assembly 51 and the lower support rod 30 located at the bottom of the children's bed 100. Furthermore, a drive pin is provided on the upper seat 513, engaging with the sliding member 11. This facilitates the following: before the traction component 51 drives the connecting rod assembly 52 to unlock the locking member 40, the traction component 51 does not move the upper sliding member 11; only after the traction component 51 moves along the upright 10 to unlock the locking member 40 will it engage and drive the upper sliding member 11 to move synchronously. The upright 10 may have a slotted hole through which the drive pin passes, extending along the extension direction of the upright 10. It should also be noted that the traction component assembly 51 may also consist only of the traction component 512. At this point, a groove 513 can be provided on the traction component 512.

[0083] Referring to Figures 5 and 6, in one embodiment of this application, a stop seat 221 and an elastic element 222 are provided on the surrounding rod 22. The stop seat 221 is fixed on the surrounding rod 22, and the elastic element 222 is disposed between the connecting rod assembly 52 and the stop seat 221.

[0084] In this embodiment, one end of the elastic element 222 can contact the connecting rod assembly 52, while the stop seat 221 can contact and limit the other end of the elastic element 222. This allows the connecting rod assembly 52 to compress the elastic element 222 when it moves the locking member 40 to the unlocked position, causing the elastic element 222 to generate an elastic restoring force. After the children's bed 100 is fully extended, the elastic element 222 facilitates the movement and reset of the connecting rod assembly 52 and the locking member 40 to the locked position. The elastic element 222 can be a spring. Furthermore, when the children's bed 100 is in the extended state, the elastic element 222 can be in a pre-compressed state, allowing the aforementioned protrusion 521 to be stably inserted into the groove 511, thus limiting and locking the connecting rod assembly 52 when the children's bed 100 is in the extended state. Of course, since the locking member 40 can be connected to the connecting rod assembly 52, it can also be said that it limits the locking member 40 in the locked position, thereby improving the stability of the locking member 40 in the locked position and thus improving the stability of the children's bed 100 in the unfolded state. Of course, when the children's bed 100 is in the unfolded state, the elastic member 222 may not have a pre-compression state. In this case, the connecting rod assembly 52 can use the elastic glass beads and the surrounding rod 22 described above to lock and limit the connection, thereby achieving the limiting and locking of the connecting rod assembly 52 when the children's bed 100 is in the unfolded state. In addition, it should be noted that in other embodiments, the elastic member 222 may also be a spring sheet or the like.

[0085] Please refer to Figure 5. In one embodiment of this application, the connecting rod assembly 52 includes a connecting rod 522 and a limiting seat 523. The connecting rod 522 extends along the extension direction of the surrounding rod 22. The limiting seat 523 is connected to the end of the connecting rod 522 near the upright rod 10. The limiting seat 523 is provided with a protrusion 521. The locking member 40 is connected to the end of the connecting rod 522 away from the limiting seat 523.

[0086] In this embodiment, the linkage assembly 52 is configured to include a linkage 522 and a limiting seat 523, so that the limiting seat 523 can easily provide a setting position for the protruding post 521 structure. Simultaneously, the limiting seat 523, with its large contact area, allows the elastic element 222 described above to be positioned between the limiting seat 523 and the stop seat 221. The linkage 522 serves to extend the distance, enabling the linkage assembly 52 to connect with the locking member 40 located in the middle of the upper fence 20. It should also be noted that the linkage assembly 52 can also consist only of the linkage 522. In this case, the protruding post 521 can be provided on the linkage 522.

[0087] Referring to Figures 4 and 5, in one embodiment of this application, the upright 10 is provided with a lower sliding member 12 that slides along the extension direction of the upright 10. The lower support rod 30 includes a top support rod 31 and a bottom support rod 32 arranged side by side at intervals. The ends of the top support rod 31 and the bottom support rod 32 near the upright 10 are rotatably connected to the lower sliding member 12. The children's bed also has a connecting rod 70, one end of which is rotatably connected to the upright 10, and the other end is rotatably connected to the top support rod 31. The engagement position of the connecting rod 70 and the upright 10 is located above the lower sliding member 12. The engagement position of the top support rod 31 and the connecting rod 70 is farther away from the upright 10 than the engagement position of the top support rod 31 and the lower sliding member 12. The traction component 51 cooperates with the lower sliding member 12 so that when the lower support rod 30 folds and moves closer to the upright 10, it drives the lower sliding member 12 to slide, thereby pulling the traction component 51 to move.

[0088] In this embodiment, the arrangement of the lower sliding member 12, connecting rod 70, top support rod 31, and bottom support rod 32 forms a crank-slider mechanism. Thus, when the bottom support rod 32 and top support rod 31 of the lower support rod 30 rotate, fold, and unfold, the lower sliding member 12 can be driven to slide on the upright rod 10, thereby driving the traction component 51, which cooperates with the lower sliding member 12, to move on the upright rod 10. Furthermore, the upright rod 10, traction component 51, lower sliding member 12, bottom support rod 32, top support rod 31, and connecting rod 70 are interconnected, which helps improve the stability of the lower support rod 30 in driving the traction component 51 during rotation, folding, and unfolding. The connecting rod 70 can be a linear rod; it can also include two linear rods arranged at an angle, or further include an arc-shaped segment between the two linear rods at an angle, or a single arc-shaped rod, with the opening of the angle formed by the connecting rod 70 facing away from the connection between the upright rod 10 and the lower support rod 30. In this configuration, the connecting rod 70 can effectively apply a downward force to the lower sliding member 12 when the children's bed 100 is in the folded state, ensuring the children's bed 100 remains relatively stable in the folded state. Simultaneously, when in the unfolded state, the shape and structure of the connecting rod 70 can better match the shapes of the upright rod 10 and the lower support rod 30, and the structure of the connecting rod 70 itself is also relatively regular, thus improving the aesthetics of the children's bed 100 and the ease of manufacturing the connecting rod 70. In addition, a connecting rod 70 can be provided between each upright 10 and a lower support rod 30, or two connecting rods 70 can be provided. In this case, the two connecting rods 70 can be arranged opposite each other and located on both sides of the lower support rod 30 to improve the stability of the connection. In addition, the ends of the bottom support rod 32 and the top support rod 31 away from the lower sliding member 12 can be rotatably connected to the base 90 described above.

[0089] Please refer to Figure 5. In one embodiment of this application, to simplify the connection structure and improve the ease of manufacturing the children's bed 100, the lower sliding member 12 can be a sliding sleeve 121 fitted outside the upright 10; the traction assembly 51 may also include a lower seat 514 disposed at the lower end of the traction member 512, and a connecting pin may be provided on the lower seat 514. The connecting pin extends outside the upright 10 and can be connected to the lower sliding member 12. The upright 10 may have a strip-shaped hole through which the connecting pin passes and extends along the extending direction of the upright 10.

[0090] Referring to Figures 7 to 11, in one embodiment of this application, the upright 10 is provided with a lower sliding member 12 that slides along the extension direction of the upright 10, and a fixing seat 13 fixed on the upright 10, with the fixing seat 13 located below the lower sliding member 12; one end of the lower support rod 30 near the upright 10 is rotatably connected to the lower sliding member 12; the children's bed also has a connecting rod 70, one end of which is rotatably connected to the lower sliding member 12, and the other end is rotatably connected to the lower support rod 30, and the engagement position of the lower support rod 30 and the fixing seat 13 is farther away from the upright 10 than the engagement position of the lower support rod 30 and the connecting rod 70; the traction component 51 cooperates with the lower sliding member 12 so that when the lower support rod 30 is folded and close to the upright 10, it drives the lower sliding member 12 to slide to pull the traction component 51 to move.

[0091] In this embodiment, by setting the fixed base 13, the lower sliding member 12, and the connecting rod 70, a crank-slider mechanism can be formed. Thus, when the lower support rod 30 rotates, folds, and unfolds, the lower sliding member 12 can be driven to slide on the upright rod 10, thereby driving the traction assembly 51 connected to the lower sliding member 12 to move on the upright rod 10. Furthermore, the structure of the lower support rod 30 and the traction assembly 51 can be relatively simple, thus improving the ease of manufacturing the children's bed 100. The lower sliding member 12 can be connected and cooperate with the lower end of the traction member 512 in the traction assembly 51, thereby omitting the lower seat body 514 and simplifying the structure of the traction assembly 51. Alternatively, the lower sliding member 12 can also be connected and cooperate with the lower seat body 514 in the traction assembly 51.

[0092] Referring to Figures 1 to 3 and Figure 5, or Figures 7 to 9 and Figure 11, in one embodiment of this application, the folding process of the children's bed 100 can be as follows: the base 90 is pulled upwards, causing the lower support rod 30 to fold and approach the upright rod 10. At this time, the lower support rod 30 can drive the lower sliding member 12 to move downwards through the cooperation of the connecting rod 70, thereby driving the traction component 51 to move downwards. The downwardly moving traction component 51 can abut against and drive the connecting rod component 52, thereby driving the locking member 40 to move to the unlocked position. At this time, after the upper railing 20 is unlocked, the two railing rods 22 in the upper railing 20 can rotate and fold towards the upright rod 10 under the pull of the upper sliding member 11 and the diagonal support rod 60, thereby realizing the overall folding of the children's bed 100. The unfolding process of the children's bed 100 can then be as follows: press down on the base 90 to make the lower support rod 30 rotate and unfold away from the upright rod 10; at this time, the lower support rod 30 can drive the lower sliding member 12 to move upward through the cooperation of the connecting rod 70, while the railing 22 can drive the upper sliding member 11 to move upward through the cooperation of the inclined support rod 60, and under the action of the elastic member 222, drive the locking member 40 to reset to the locking position to lock the upper railing 20 in the unfolded state.

[0093] Referring to Figures 12 to 18, in one embodiment of this application, at least one upright post 10 is defined as a first upright post 14. The bottom of the first upright post 14 is provided with a rolling part 141. The rolling part 141 can slide along the extension direction of the first upright post 14. During the up-down movement, the rolling part 141 has a protruding position that protrudes downward relative to the bottom of the first upright post 14 and a retracted position that retracts upward relative to the bottom of the first upright post 14. The rolling part 141 is connected to the traction assembly 51 so that when the children's bed 100 is transformed from an unfolded state to a folded state, the rolling part 141 can be driven by the traction assembly 51 to move to the protruding position.

[0094] It should be noted that "at least one of the uprights 10 is set as the first upright 14" includes two uprights 10 being set as the first upright 14, three uprights 10 being set as the first upright 14, or even all uprights 10 being set as the first upright 14.

[0095] Referring to Figures 14 and 15, or Figures 17 and 18, the rolling part 141 can be a ball or a universal roller. This application does not limit the specific structural form of the rolling part 141.

[0096] Referring to Figures 14 and 15, or Figures 17 and 18, when the traction assembly 51 includes the lower seat 514 described above, the rolling part 141 can be connected to the lower seat 514; when the traction assembly 51 does not include the lower seat 514, the rolling part 141 can be connected to the traction member 512 in the traction assembly 51. That is, during the process of the lower support rod 30 folding and approaching the upright rod 10 to drive the traction assembly 51 to move downward, the rolling part 141 can be driven to protrude so that it can abut against the ground.

[0097] The phrase "when the children's bed 100 transitions from the unfolded state to the folded state, the traction assembly 51 drives the rolling part 141 to the protruding position" can be understood as follows: as the children's bed 100 leaves the unfolded state, the rolling part 141 immediately leaves the retracted position and protrudes outward relative to the bottom of the first upright 14. When the children's bed 100 reaches the folded state, the rolling part 141 fully reaches the protruding position. In this method, the retracted position of the rolling part 141 corresponds to the unfolded state of the children's bed 100, and the protruding position of the rolling part 141 corresponds to the folded state of the children's bed 100. Alternatively, it can be understood that during the transition of the children's bed 100 from the unfolded state to the folded state, the rolling part 141 leaves the retracted position and gradually reaches the protruding position. In this method, the travel distance of the rolling part 141 between the retracted position and the protruding position only corresponds to a portion of the travel distance of the children's bed 100 during the transition between the unfolded and folded states.

[0098] The bottom of the first upright 14 may be provided with an opening that connects the inner and outer sides of the upright 10, and the rolling part 141 extends out from the opening at the bottom of the first upright 14 at the protruding position.

[0099] In this embodiment, a rolling part 141 is provided at the bottom of the first upright 14 among the multiple uprights 10, and is connected and cooperates with the traction assembly 51. This allows the rolling part 141 to be driven by the traction assembly 51 to protrude downwards relative to the bottom of the upright 10 to a protruding position during the process of the children's bed 100 moving from an unfolded state to a folded state. In this position, the rolling part 141 can contact the ground, thereby changing the original sliding friction between the first upright 14 and the ground into rolling friction between the rolling part 141 and the ground. This reduces the frictional resistance exerted by the ground on the first upright 14, further improving the convenience of folding the children's bed. Furthermore, in some embodiments, when the children's bed 100 is in the unfolded state, the rolling part 141 is in the retracted position. When the children's bed 100 is in the unfolded state, the rolling part 141 can be in the retracted position. At this time, the first upright 14 contacts the ground through its bottom, thereby increasing the frictional resistance between the children's bed 100 and the ground, preventing the children's bed 100 from moving relative to the ground, and improving the safety factor of the children's bed 100.

[0100] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A children's bed, characterized in that, include: The pole, the upper railing at the upper end of the pole, the lower support rod at the lower end of the pole, the locking element, and the linkage mechanism; Both the upper fence and the lower support rod have an unfolded state and a folded state. The locking member is movably disposed on the upper fence and limits and locks the upper fence in the unfolded state when it is moved to the locking position. The linkage mechanism includes a traction component and a connecting rod component. The traction component is movably disposed on the upright and cooperates with the lower support rod so that when the lower support rod rotates and folds toward the upright, it drives the traction component to move along the upright. The linkage assembly is movably mounted on the upper fence and engages with the traction assembly for transmission. The linkage assembly also engages with the locking member so that when the linkage assembly is engaged by the traction assembly, it drives the locking member to move toward the unlocking position.

2. The children's bed as described in claim 1, characterized in that, When the lower support rod rotates and folds toward the upright, causing the traction assembly to move along the upright, the traction assembly pushes the connecting rod assembly, so that the connecting rod assembly causes the locking member to move toward the unlocking position; The traction assembly is provided with a groove, the groove wall includes an abutting guide surface, and the connecting rod assembly is provided with a protrusion. When the locking member is in the locking position, the protrusion is inserted into the groove; When the lower support rod rotates and folds toward the upright, causing the traction assembly to move along the upright, the abutting guide surface slides relative to the protrusion, thereby driving the protrusion to move away from the groove and causing the connecting rod assembly to move the locking member to the unlocked position.

3. The children's bed as described in claim 2, characterized in that, The abutment guide surface extends obliquely and is inclined downwards. The protruding post has a mating surface that matches and abuts the abutment guide surface. When the lower support rod rotates and folds toward the upright, causing the traction assembly to move downwards on the upright, the abutting guide surface slides relative to the mating surface, thereby driving the protrusion to move and disengage from the groove.

4. The children's bed as described in claim 2, characterized in that, The upper fence includes a connecting seat and two rails rotatably mounted on opposite sides of the connecting seat. The locking element is movably mounted on the rails, and the connecting seat is provided with a locking groove that cooperates with the locking element. In the locked position, the locking member is positioned in the locking groove to restrict the relative rotation of the railing and the connecting seat; in the unlocked position, the locking member disengages from the locking groove, and the railing can rotate and fold towards the upright.

5. The children's bed as described in claim 4, characterized in that, The locking member is slidably disposed along the extension direction of the railing and has a sliding pin protruding from the railing, the sliding pin being slidably disposed within the locking groove.

6. The children's bed as described in claim 5, characterized in that, The connecting seat also has a sliding clearance groove, and when the surrounding rod rotates relative to the upright rod, the sliding pin slides along the sliding clearance groove.

7. The children's bed as described in claim 4, characterized in that, The children's bed also has an inclined support rod, which is supported between the upright and the surrounding rod when the bed is unfolded. The diagonal support rod is movably connected to the upright and the surrounding rod respectively, so that when the surrounding rod moves towards the upright and folds up, the diagonal support rod will fold between the surrounding rod and the upright.

8. The children's bed as described in claim 7, characterized in that, One end of the inclined support rod is rotatably connected to the surrounding rod, and the other end of the inclined support rod is slidably disposed relative to the upright rod and rotatably disposed relative to the upright rod.

9. The children's bed as described in claim 8, characterized in that, The upright is provided with an upper sliding member that is slidably disposed along the extension direction of the upright, and the end of the inclined support rod away from the surrounding rod is rotatably mounted on the upper sliding member.

10. The children's bed as described in claim 9, characterized in that, The upper sliding component is an upper sliding sleeve fitted outside the upright.

11. The children's bed as described in claim 9, characterized in that, The traction component cooperates with the upper sliding member to drive the upper sliding member to move as the traction component moves downward along the upright to pull the surrounding pole to rotate and fold in the direction of approaching the upright; When the traction assembly moves downward along the upright, the traction assembly first drives the connecting rod assembly to move to unlock the locking member, at which time the traction assembly slides relative to the upper sliding member; After the traction component moves along the upright to unlock the locking member, the traction component abuts against the upper sliding member and drives the upper sliding member to move synchronously.

12. The children's bed as described in claim 11, characterized in that, The traction component assembly includes a traction component and an upper seat. The traction component extends along the extension direction of the upright, and the upper seat is slidably disposed within the upright and is provided with the groove. The upper body is provided with a drive pin, which extends outside the upright and slides with the upright. After the drive pin moves to abut against the upper sliding member, it drives the upper sliding member to move.

13. The children's bed as described in any one of claims 1 to 12, characterized in that, The upright is provided with a lower sliding member that is slidably arranged along the extension direction of the upright. The lower support rod includes a top support rod and a bottom support rod arranged side by side at intervals. The ends of the top support rod and the bottom support rod that are close to the upright are rotatably connected to the lower sliding member. The children's bed also has a connecting rod, one end of which is rotatably connected to the upright and the other end is rotatably connected to the top support rod. The joint between the connecting rod and the upright is located above the lower sliding member, and the joint between the top support rod and the connecting rod is farther away from the upright than the joint between the top support rod and the lower sliding member. The traction component cooperates with the lower sliding member so that when the lower support rod folds and approaches the upright, it drives the lower sliding member to slide, thereby pulling the traction component to move.

14. The children's bed as described in any one of claims 1 to 12, characterized in that, The upright is provided with a lower sliding member that is slidably disposed along the extension direction of the upright, and a fixing seat fixed on the upright, wherein the fixing seat is located below the lower sliding member; The lower support rod is rotatably connected to the lower sliding member at one end near the upright rod. The children's bed also has a connecting rod, one end of which is rotatably connected to the lower sliding member and the other end is rotatably connected to the lower support rod. The engagement position of the lower support rod and the fixed seat is farther away from the upright than the engagement position of the lower support rod and the connecting rod. The traction component cooperates with the lower sliding member so that when the lower support rod folds and approaches the upright, it drives the lower sliding member to slide, thereby pulling the traction component to move.

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