RETRACTABLE STRUCTURE OF FOLDING BED, AND FOLDING BED

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority of Chinese Patent Application No. 202422088268.7, filed on Aug. 27, 2024, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to the technical field of folding beds, and in particular to a retractable structure of a folding bed, and a folding bed.

BACKGROUND

The inventor has found through research that a baby folding bed of the prior art is generally provided with a locking mechanism. When the baby folding bed is in an unfolded state, the locking mechanism is in a locked state, such that the baby folding bed stably maintains the unfolded state. However, to fold or retract the baby folding bed, the user needs to unlock the locking mechanism first, and even needs to unlock a plurality of components, such as a bottom connecting rod and a top connecting rod, and then fold the connecting rods. It is troublesome to fold the baby folding bed, with relatively low folding efficiency.

SUMMARY

In order to solve the above technical problems, the present disclosure provides a retractable structure of a folding bed, and a folding bed, and the specific technical solution is as follows:

A retractable structure of a folding bed, where the retractable structure includes a support base, a first folding seat and a second folding seat disposed on two sides of the support base, a first connecting shaft configured to mount the first folding seat and the second folding seat on the support base and slidably connected to the support base, and a second connecting shaft disposed on the support base and slidably connected to the support base; and

the first folding seat is provided with a first hook groove capable of hooking the second connecting shaft, and the second folding seat is provided with a second hook groove capable of hooking the second connecting shaft.

Further, the support base is provided with a first elongated groove for the first connecting shaft to move in a vertical direction, and a second elongated groove for the second connecting shaft to move in the vertical direction.

Further, the first folding seat includes a first main body portion and two first connecting portions disposed on the first main body portion side by side, and a first mounting hole for the first connecting shaft to penetrate is formed on a lower portion of either of the first connecting portions; and

the second folding seat includes a second main body portion and two second connecting portions disposed on the second main body portion side by side, and a second mounting hole for the first connecting shaft to penetrate is formed on a lower portion of either of the second connecting portions.

Further, the retractable structure further includes a moving assembly configured to move the second connecting shaft upward.

Further, the moving assembly includes a sliding seat and a moving member configured to lift the sliding seat and the second connecting shaft upward.

Further, a limiting hole is formed on the sliding seat, the support base is provided with a limiting column matched with the limiting hole, and the moving member is sleeved on the second connecting shaft and sequentially penetrates the sliding seat and the support base.

Further, the limiting column is located in the mounting space, the sliding seat is located in the mounting space and slidably connected to the limiting column, and the number of the limiting holes and that of the limiting columns are both two.

A folding bed is further provided in the present disclosure, including a folding base, where the folding base includes a retractable structure, first folding rods with one ends disposed on the retractable structure respectively, and first supporting legs disposed at the other ends of the first folding rods respectively, where the number of the first folding rods is four, and the number of the first supporting legs is also four.

Further, the folding bed further includes four upright posts and a folding frame, where lower ends of the four upright posts are correspondingly connected to the four supporting legs, and the folding frame is disposed above the four upright posts; and

• • the folding frame includes two first snap-fit joints disposed on two upright posts, two angular connectors disposed on the other two upright posts, a lifting folding assembly disposed between the two first snap-fit joints, second snap-fit joints disposed at two ends of the lifting folding assembly and configured to be matched with the first snap-fit joints, a first folding assembly disposed between the two angular connectors, and second folding assemblies disposed between the first snap-fit joints and the angular connectors.

Further, either of the first snap-fit joints is provided with a vertical sliding groove, and a plurality of snap-fit grooves spaced apart from each other in an up-down direction are formed in the sliding groove; and

• • either of the second snap-fit joints is provided with a guide rail, a horizontally slidable snap-fit clasp is disposed above the guide rail, and a spring is disposed between the snap-fit clasp and the second snap-fit joint, where the guide rail extends into the sliding groove and slides up and down while attached to the sliding groove, and the snap-fit clasp is snap-fitted into one of the snap-fit grooves under the action of the spring.

Further, either of the first snap-fit joints includes an upper snap-fit joint and a lower snap-fit joint, where the upper snap-fit joint is disposed at a top end of the upright post and further connected to the second folding assembly, the lower snap-fit joint is disposed below the upper snap-fit joint and mounted on the upright post, and two ends of the lifting folding assembly are respectively connected to the second snap-fit joints; an upper sliding groove is formed on a side wall of the upper snap-fit joint close to the second snap-fit joint, a lower sliding groove is formed on a side wall of the lower snap-fit joint close to the second snap-fit joint, the upper sliding groove and the lower sliding groove are directly opposite to each other in the up-down direction and form the sliding groove together, and the snap-fit grooves are respectively formed in the upper sliding groove and the lower sliding groove; and

• • further, the second snap-fit joint is provided with a sleeve, the spring is disposed in the sleeve, a first clearance hole is formed on a wall of the sleeve, and the snap-fit clasp includes a snap-fit head, a push plate, and a connecting plate, where the snap-fit head is disposed in the sleeve and connected to the spring, one end of the connecting plate is fixedly connected to the snap-fit head, and the other end of the connecting plate penetrates the first clearance hole and is fixedly connected to the push plate.

Further, the second snap-fit joint is internally hollow, a third mounting hole is formed on a side wall of the second snap-fit joint close to the sliding groove, an elastic snap-fit hook is disposed on the wall of the sleeve, the sleeve is disposed at the third mounting hole in a penetrating manner, the elastic snap-fit hook hooks a side wall of the second snap-fit joint close to the sliding groove, a second clearance hole is further formed on a side wall of the second snap-fit joint close to the push plate, and the second clearance hole is directly opposite to the first clearance hole such that the connecting plate penetrate.

Further, the elastic snap-fit hooks are L-shaped elastic snap-fit hooks, and two elastic snap-fit hooks are symmetrically distributed in the up-down direction.

Further, the lifting folding assembly, the first folding assembly, or the second folding assembly includes two third folding rods disposed side by side in an axial direction, two fourth folding rods disposed side by side in the axial direction and located below the third folding rods, and second rotating seats disposed between the two third folding rods and the two fourth folding rods; one end of the third folding rod and one end of the fourth folding rod are rotatably connected to the angular connector, the first snap-fit joint, or the second snap-fit joint, the other end of the third folding rod is connected to the second rotating seat through a first sliding rod and a second sliding rod, and the other end of the fourth folding rod is rotatably connected to the second rotating seat; and a bushing is disposed at one end of the fourth folding rod connected to the second rotating seat, alternatively, a gasket is disposed between either side of the fourth folding rod and an inner side of the second rotating seat, the number of the gaskets is greater than or equal to 1, and rotating portions configured to be embedded into the second rotating seat are further disposed on two sides of the bushing.

Further, a reinforcing assembly is disposed between the two first folding rods, and the reinforcing assembly includes a first rotating seat sleeved on the first folding rod, two second folding rods with one ends rotatably connected to the first rotating seat, and a second supporting leg configured to connect the other ends of the two second folding rods, where the two second folding rods are rotatably connected to the second supporting leg.

From the above description of the present disclosure, it is known that the present disclosure has the following beneficial effects:

In the retractable structure of the present disclosure, the first connecting shaft is configured to mount the first folding seat and the second folding seat, the first folding seat and the second folding seat hook the second connecting shaft, the support base is directly pressed down for unfolding, and the support base is lifted upward for folding, such that fast folding is achieved.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings described herein are used for achieving further understanding of present disclosure, and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and the description of the illustrative embodiments serve to explain the present disclosure and are not to be construed as unduly limiting the present disclosure.

Figure Description:

FIG. 1 is an axonometric view I of a retractable structure of a folding bed.

FIG. 2 is an exploded view I of a retractable structure of a folding bed.

FIG. 3 is an exploded view II of a retractable structure of a folding bed.

FIG. 4 is a partial enlarged view of FIG. 3.

FIG. 5 is an axonometric view I of a first folding seat.

FIG. 6 is an axonometric view I of a moving assembly.

FIG. 7 is an axonometric view I of a folding bed.

FIG. 8 is an axonometric view II of a folding bed.

FIG. 9 is an exploded view of a folding bed.

FIG. 10 is a partial enlarged view of FIG. 9.

FIG. 11 is an exploded view of a second snap-fit joint.

FIG. 12 is a sectional view of a second snap-fit joint.

FIG. 13 is a partial enlarged view I of a folding assembly.

FIG. 14 is a schematic structural diagram of a bushing.

FIG. 15 is a partial enlarged view II of a folding assembly.

Reference numerals in the FIGS. 1 to 10:

001—support base; 011—first elongated groove; 012—second elongated groove; 013—mounting space; 014—limiting column; 015—second through hole; 002—first folding seat; 021—first main body portion; 022—first connecting portion; 221—first mounting hole; 222—first hook groove; 003—second folding seat; 031—second main body portion; 032—second connecting portion; 321—second mounting hole; 322—second hook groove; 004—first connecting shaft; 005—second connecting shaft; 006—moving assembly; 061—sliding seat; 611—limiting hole; 612—first through hole; 062—moving member; 007—first folding rod; 071—first supporting leg; 072—reinforcing assembly; 721—first rotating seat; 722—second folding rod; 723—second supporting leg; 008—upright post; 009—folding frame; 091—first snap-fit joint; 911—upper snap-fit joint; 912—upper sliding groove; 913—lower snap-fit joint; 914—lower sliding groove; 915—snap-fit groove; 092—angular connector; 093—lifting folding assembly; 094—second snap-fit joint; 941—guide rail; 942—snap-fit clasp; 943—spring; 944—sleeve; 945—first clearance hole; 946—snap-fit head; 947—push plate; 948—connecting plate; 949—third mounting hole; 950—elastic snap-fit hook; 951—second clearance hole; 095—first folding assembly; 096—second folding assembly; 971—third folding rod; 9711—first sliding rod; 9712—second sliding rod; 972—fourth folding rod; 973—second rotating seat; 9731—first sliding groove; 9732—second sliding groove; 974—bushing; 9741—rotating portion; and 975—gasket.

DETAILED DESCRIPTIONS OF THE EMBODIMENTS

To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure clearer and more understandable, the present disclosure will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that specific embodiments described herein are merely intended to explain the present disclosure, and are not intended to limit the present disclosure.

With reference to FIGS. 1 to 6, a retractable structure of a folding bed provided in this embodiment includes a support base 001, a first folding seat 002 and a second folding seat 003 disposed on two sides of the support base 001, a first connecting shaft 004 configured to mount the first folding seat 002 and the second folding seat 003 on the support base 001 and slidably connected to the support base 001, and a second connecting shaft 005 disposed on the support base 001 and slidably connected to the support base 001; and the first folding seat 002 is provided with a first hook groove 222 capable of hooking the second connecting shaft 005, and the second folding seat 003 is provided with a second hook groove 322 capable of hooking the second connecting shaft 005.

The support base 001 is provided with a first elongated groove 011 for a first connecting shaft 004 to move in a vertical direction, and a second elongated groove 012 for a second connecting shaft 005 to move in the vertical direction. When the first connecting shaft 004 moves downward along the first elongated groove 011, lower portions of the first folding seat 002 and the second folding seat 003 rotate along a central axis of the first connecting shaft 004, such that upper inner sides of the two folding seats approach each other, and the second connecting shaft 005 is embedded into the first hook groove 222 and the second hook groove 322.

The first folding seat 002 includes a first main body portion 021 and two first connecting portions 022 disposed on the first main body portion 021 side by side, and a first mounting hole 221 for the first connecting shaft 004 to penetrate is formed on a lower portion of either of the first connecting portions 022; and the second folding seat 003 includes a second main body portion 031 and two second connecting portions 032 disposed on the second main body portion 031 side by side, and a second mounting hole 321 for the first connecting shaft 004 to penetrate is formed on a lower portion of either of the second connecting portions 032. After the first folding seat 002 and the second folding seat 003 are mounted, the two second connecting portions 032 are located on inner sides of the two first connecting portions 022. The first hook groove 222 is located on an upper portion of the first connecting portion 022, and the second hook groove 322 is located on an upper portion of the second connecting portion 032. The first main body portion 021 and the second main body portion 031 are structurally identical and configured to mount folding rods so as to achieve the folding function.

A mounting space 013 is disposed in the support base 001 and configured to mount the first folding seat 002 and the second folding seat 003, and after the first connecting portion 022 and the second connecting portion 032 are mounted on the first connecting shaft 004, most portions of the first connecting portion 022 and the second connecting portion 032 are located in the mounting space 013.

The retractable structure further includes a moving assembly 006 configured to move the second connecting shaft 005 upward; and the moving assembly 006 includes a sliding seat 061 and a moving member 062 configured to lift the sliding seat 061 and the second connecting shaft 005 upward. A limiting hole 611 is formed on the sliding seat 061, the support base 001 is provided with a limiting column 014 matched with the limiting hole 611, and the moving member 062 is sleeved on the second connecting shaft 005 and sequentially penetrates the sliding seat 061 and the support base 001. The limiting column 014 is located in the mounting space 013, the sliding seat 061 is located in the mounting space 013 and slidably connected to the limiting column 014, and the number of the limiting holes 611 and that of the limiting columns 014 are both two. The moving member 062 is structured as a loop formed by stitching a strap, the sliding seat 061 is provided with a flat-shaped first through hole 612 for the moving member 062 to penetrate, the support base 001 is provided with a flat-shaped second through hole 015 for the moving member 062 to penetrate, and the second through hole 015 is communicated with the mounting space 013.

With reference to FIGS. 1 to 15, a folding bed is further provided in this embodiment of the present disclosure, which employs a retractable structure of a folding bed and includes a folding base, where the folding base includes a retractable structure, first folding rods 007 with one ends disposed on the retractable structure respectively, and first supporting legs 071 disposed at the other ends of the first folding rods 007 respectively, where the number of the first folding rods 007 is four, and the number of the first supporting legs 071 is also four.

The folding bed further includes four upright posts 008 and a folding frame 009, where the four upright posts 008 are located at four corners, upper ends of the four upright posts 008 correspond to four corners of the folding frame 009, lower ends of the four upright posts 008 are correspondingly connected to the four supporting legs, and the folding frame 009 is disposed above the four upright posts 008; and the folding frame 009 includes two first snap-fit joints 091 disposed on two upright posts 008, two angular connectors 092 disposed on the other two upright posts 008, a lifting folding assembly 093 disposed between the two first snap-fit joints 091, second snap-fit joints 094 disposed at two ends of the lifting folding assembly 093 and configured to be matched with the first snap-fit joints 091, a first folding assembly 095 disposed between the two angular connectors 092, and second folding assemblies 096 disposed between the first snap-fit joints 091 and the angular connectors 092. The folding frame 009 of the present disclosure has a square structure, four sides are formed between the two first snap-fit joints 091, between the two angular connectors 092, and between the first snap-fit joints 091 and the angular connectors 092 in total, the lifting folding assembly 093 and the first folding assembly 095 are respectively disposed on two opposite sides of the four sides, the second folding assemblies 096 are disposed on the other two opposite sides, and after unfolding, the second folding assemblies 096 are overall perpendicular to the first folding assembly 095 or the lifting folding assembly 093.

Either of the first snap-fit joints 091 is provided with a vertical sliding groove, and a plurality of snap-fit grooves 915 spaced apart from each other in an up-down direction are formed in the sliding groove; and either of the second snap-fit joints 094 is provided with a guide rail 941, a horizontally slidable snap-fit clasp 942 is disposed above the guide rail 941, and a spring 943 is disposed between the snap-fit clasp 942 and the second snap-fit joint 094, where the guide rail 941 extends into the sliding groove and slides up and down while attached to the sliding groove, and the snap-fit clasp 942 is snap-fitted into one of the snap-fit grooves 915 under the action of the spring 943.

Specifically, in this solution, the snap-fit clasp 942 is pushed to compress the spring 943, and after the snap-fit clasp 942 disengages from the snap-fit groove 915, the second snap-fit joint 094 slides up and down along the first snap-fit joint 091, such that lifting is achieved. In the lifting process, cooperation between the guide rail 941 and the sliding groove enables to guide and limit sliding of the second snap-fit joint 094 and prevent the second snap-fit joint 094 from disengaging from the first snap-fit joint 091, and moreover, a tiny clearance between the guide rail 941 and the sliding groove results in that the guide rail 941 slides up and down while attached to the sliding groove, such that a sliding gap between the second snap-fit joint 094 and the first snap-fit joint 091 is small, thereby preventing shaking of the second snap-fit joint 094.

When the second snap-fit joint 094 slides up and down, the snap-fit clasp 942 is loosened, and the spring 943 pushes the snap-fit clasp 942 to be automatically snap-fitted into a certain snap-fit groove 915, such that a height of the second snap-fit joint 094 is adjusted and fixed, that is, the number of the snap-fit grooves 915 is equivalent to the number of height adjustment positions of the second snap-fit joint 094 and also the number of height adjustment positions of the lifting folding assembly 093, where the specific number thereof is set according to actual needs, which is not limited herein.

Either of the first snap-fit joints 091 includes an upper snap-fit joint 911 and a lower snap-fit joint 913, where the upper snap-fit joint 911 is disposed at a top end of the upright post 008 and further connected to the second folding assembly 096, the lower snap-fit joint 913 is disposed below the upper snap-fit joint 911 and mounted on the upright post 008, and two ends of the lifting folding assembly 093 are respectively connected to the second snap-fit joints 094; and the upper snap-fit joint 911, the lower snap-fit joint 913, and the second snap-fit joint 094 are provided with first mounting holes 221 respectively, the second folding assembly 096, the upright post 008, and the lifting folding assembly 093 are respectively provided with a second mounting hole 321 corresponding to the first mounting hole 221 on the corresponding snap-fit joint, and a pin shaft penetrates the first mounting hole 221 and the corresponding second mounting hole 321 to achieve the connection between each snap-fit joint and a corresponding upright post 008 or a corresponding third folding rod 971. An upper sliding groove 912 is formed on a side wall of the upper snap-fit joint 911 close to the second snap-fit joint 094, a lower sliding groove 914 is formed on a side wall of the lower snap-fit joint 913 close to the second snap-fit joint 094, the upper sliding groove 912 and the lower sliding groove 914 are directly opposite to each other in the up-down direction and form the sliding groove together, and the snap-fit grooves 915 are respectively formed in the upper sliding groove 912 and the lower sliding groove 914; and

The second snap-fit joint 094 is provided with a sleeve 944, the spring 943 is disposed in the sleeve 944, a first clearance hole 945 is formed on a wall of the sleeve 944, and the snap-fit clasp 942 includes a snap-fit head 946, a push plate 947, and a connecting plate 948, where the snap-fit head 946 is disposed in the sleeve 944 and connected to the spring 943, one end of the connecting plate 948 is fixedly connected to the snap-fit head 946, and the other end of the connecting plate penetrates the first clearance hole 945 and is fixedly connected to the push plate 947. When in use, pushing of the push plate 947 causes the snap-fit head 946 to compress the spring 943, and after the snap-fit head 946 retracts into the sleeve 944, the second snap-fit joint 094 may slide up and down; in the sliding process, when the push plate 947 is loosened and when the second snap-fit joint 094 moves to a position of a certain snap-fit groove 915, the spring 943 automatically pushes the snap-fit head 946 to be snap-fitted into the snap-fit groove 915, such that the second snap-fit joint 094 is supported and limited; and the lifting adjustment mode is simple and convenient.

The second snap-fit joint 094 is internally hollow, a third mounting hole 949 is formed on a side wall of the second snap-fit joint 094 close to the sliding groove, an elastic snap-fit hook 950 is disposed on the wall of the sleeve 944, the sleeve 944 is disposed at the third mounting hole 949 in a penetrating manner, the elastic snap-fit hook 950 hooks a side wall of the second snap-fit joint 094 close to the sliding groove, a second clearance hole 951 is further formed on a side wall of the second snap-fit joint 094 close to the push plate 947, and the second clearance hole 951 is directly opposite to the first clearance hole 945 such that the connecting plate 948 penetrate. Therefore, the connection between the sleeve 944 and the second snap-fit joint 094 may be achieved, which facilitates the subsequent assembly of height-adjustable locking fasteners.

In practical applications, the elastic snap-fit hooks 950 are L-shaped elastic snap-fit hooks 950, two elastic snap-fit hooks 950 are symmetrically distributed in the up-down direction, and the sleeve 944 may be securely mounted at the third mounting hole 949 by compressing the elastic snap-fit hooks 950.

In the present disclosure, compared with a conventional locking fastener, the first snap-fit joint 091 and the second snap-fit joint 094 are connected and cooperate in the following characteristic manner:

• • 1. Either of the first snap-fit joints 091 is provided with the sliding groove 912, and either of the second snap-fit joints 094 is provided with the guide rail 941; in the lifting process, cooperation between the guide rail 941 and the sliding groove enables to guide and limit sliding of the second snap-fit joint 094 and prevent the second snap-fit joint 094 from disengaging from the first snap-fit joint 091, and moreover, a tiny clearance between the guide rail 941 and the sliding groove results in that the guide rail 941 slides up and down while attached to the sliding groove, such that a sliding gap between the second snap-fit joint 094 and the first snap-fit joint 091 is small, thereby preventing shaking of the second snap-fit joint 094; and
  • 2. the sliding groove is provided with a plurality of the snap-fit grooves 915, the guide rail 941 is provided with the snap-fit clasp 942, and the second snap-fit joint 094 slides up and down, the spring 943 pushes the snap-fit clasp 942 to be automatically snap-fitted into a certain snap-fit groove 915, such that a height of the second snap-fit joint 094 is adjusted and fixed; and the operation is very convenient, and the solution features a plurality of height adjustment positions, which meet various height adjustment needs of users.

In the present disclosure, the lifting folding assembly 093, the first folding assembly 095, and the second folding assembly 096 are basically identical in an overall structure and are different in lengths, and the user may adjust the length according to assembly requirements; the lifting folding assembly 093, the first folding assembly 095, or the second folding assembly 096 includes two third folding rods 971 disposed side by side in an axial direction, two fourth folding rods 972 disposed side by side in the axial direction and located below the third folding rods 971, and second rotating seats 973 disposed between the two third folding rods 971 and the two fourth folding rods 972; one end of the third folding rod 971 and one end of the fourth folding rod 972 are rotatably connected to the angular connector 092, the first snap-fit joint 091, or the second snap-fit joint 094, the other end of the third folding rod 971 is connected to the second rotating seat 973 through a first sliding rod 9711 and a second sliding rod 9712, and the other end of the fourth folding rod 972 is rotatably connected to the second rotating seat 973; the second rotating seat 973 is provided with a first sliding groove 9731 and a second sliding groove 9732, where the first sliding groove 9731 is formed in a horizontal direction, the second sliding groove 9732 includes a first sliding portion arranged in the horizontal direction and a second sliding portion forming an included angle with the horizontal direction, the first sliding rod 9711 slides in the first sliding groove 9731, and the second sliding rod 9712 slides in the second sliding groove 9732 to achieve folding or unfolding of the third folding rod 971 and the second rotating seat 973. In order to reduce an overall weight of the folding bed, an outer diameter of the fourth folding rod 972 is smaller than that of the third folding rod 971, and in order to improve the connection stability and an overall strength of the folding bed, a bushing 974 is disposed at one end of the fourth folding rod 972 connected to the second rotating seat 973; and during installation, the bushing 974 is sleeved at one end of the fourth folding rod 972 first, and then fixed through a fixing rod, where the fixing rod may be a rivet, and further arrangement is as follows: rotating portions 9741 configured to be embedded into the second rotating seat 973 are further disposed on two sides of the bushing 974, such that one end of the fourth folding rod 972 may be pre-installed on the second rotating seat 973, and the connection stability is further guaranteed. Specifically, with reference to FIG. 10, alternatively, a gasket 975 is disposed between two sides of the fourth folding rod 972 and an inner side of the second rotating seat 973 to replace the bushing 974, and the number of the gaskets 975 is greater than or equal to 1.

Prior art may be adopted for the folding assembly of the present disclosure, and only the folding function is required for the folding assembly of the prior art, while the folding assembly of the present disclosure has the following advantages: all the folding assemblies on the four sides are foldable, such that the folding bed is completely foldable, which reduces an occupied area after folding, facilitates transport, and reduces the transport cost; and secondly, the third folding rods 971 and the fourth folding rods 972 are disposed side by side in the vertical direction, such that the overall stability and reliability are greatly improved.

A reinforcing assembly 072 is disposed between the two first folding rods 007, and the reinforcing assembly 072 includes a first rotating seat 721 sleeved on the first folding rod 007, two second folding rods 722 with one ends rotatably connected to the first rotating seat 721, and a second supporting leg 723 configured to connect the other ends of the two second folding rods 722, where the two second folding rods 722 are rotatably connected to the second supporting leg 723; rotating directions of the two ends of the second folding rod 722 are different, which facilitates the folding of the reinforcing assembly 072; the reinforcing assembly 072 is arranged as required, and for example, the number of the reinforcing assemblies is two in the present disclosure, and the two reinforcing assemblies are arranged side by side; the second supporting leg 723 is provided with a U-shaped mounting groove for mounting the second folding rod 722 to facilitate the rotational connection of the second folding rod 722, and a cylindrical supporting portion is disposed at a lower end of the second supporting leg 723; and after the folding bed is unfolded, a lower end face of the first supporting leg 071 remains flush or basically flush with a lower end face of the second supporting leg 723.

To sum up, in the retractable structure of the present disclosure, the first connecting shaft is configured to mount the first folding seat and the second folding seat, the first folding seat and the second folding seat hook the second connecting shaft, the support base is directly pressed down for unfolding, and the support base is lifted upward for folding, such that fast folding is achieved.

The present disclosure is exemplarily described above with reference to the accompanying drawings, and it is apparent that the specific implementation of the present disclosure is not limited by the above embodiments. Various non-substantial improvements made by using method concepts and technical solutions of the present disclosure, or concepts and technical solutions directly applied to other situations without improvement, all fall within the protection scope of the present disclosure.

It should be noted that the relation terms such as “first” and “second” are used herein merely for distinguishing one entity or operation from another entity or operation but do not necessarily require or imply that there exists any actual relation or sequence between these entities or operations. Furthermore, terms “including”, “comprising”, or any other variants are intended to cover the non-exclusive including, thereby making that the process, method, object or apparatus comprising a series of elements include not only those elements but also other elements that are not listed explicitly or the inherent elements to the process, method, merchandise or apparatus.