A folding playard and method of operation

Abstract

The present application relates to a kind of folding play bed and operating method, comprising: multiple support seats, each support seat is respectively connected to the unlocking mechanism arranged in the middle by folding rod group hinge;The unlocking mechanism includes: unlocking base, the hinge hole for connecting the folding rod group is arranged on the unlocking base, the lower portion of the unlocking base is provided with the guide cylinder extending up and down, the cylinder wall of the guide cylinder is provided with the slot hole for the lock rod to pass through, the unlocking base is formed in the accommodating cavity extending along the up and down direction;Lock tongue, upper end is rotatably arranged on the fixed shaft in the accommodating cavity, and the lower end of the lock tongue is provided with locking hook;Draw pin, it is arranged in the accommodating cavity and upper end exposes the accommodating cavity, the lower end of the draw pin is provided with driving portion, and the driving portion is abutted on the surface of the lock tongue;Positioning sleeve, it is sleeved on the guide cylinder, and the lock rod is arranged in the positioning sleeve, and the lock rod passes through the slot hole to be placed in the guide cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bed design, in particular to a folding play bed and an operating method. BACKGROUND

[0002] The existing children's bed is mainly used to restrict the baby inside to provide a safe play space and sleep space.

[0003] The existing children's bed frame is very inconvenient to disassemble after use, and the bolts and frame joints disassembled need to be disassembled with a screwdriver at the frame joint, and the disassembled bolts and frame joints are easy to lose during storage, affecting the normal installation and use of the subsequent play bed.

[0004] To solve this problem, the unused children's bed can be considered to be folded and stored. However, the unfolded state of the bed body with folding function is not stable enough, and the unfolded state often shakes or deforms, and the use safety cannot be guaranteed; therefore, locking after unfolding can be considered, but the current locking method is not flexible, that is, when unlocking is needed, the operation is complex and laborious, and the unlocking speed is slow. In addition, the unfolding and folding process of the bed body is not flexible. SUMMARY

[0005] Therefore, it is necessary to provide a folding play bed and an operating method to solve at least part of the above problems.

[0006] A folding play bed comprises:

[0007] A plurality of support seats, each of which is hingedly connected to an unlocking mechanism arranged in the middle through a folding rod group;

[0008] The unlocking mechanism comprises:

[0009] An unlocking base, a hinge hole for connecting the folding rod group is arranged on the unlocking base, a guide cylinder extending upward and downward is arranged at the lower part of the unlocking base, a slot hole for the lock rod to pass through is arranged on the cylinder wall of the guide cylinder, and a containing cavity extending in the upward and downward direction is formed in the unlocking base;

[0010] A lock tongue, the upper end of the lock tongue is rotatably arranged on a fixed shaft in the containing cavity, and a locking hook is arranged at the lower end of the lock tongue;

[0011] A pull pin, the pull pin is arranged in the containing cavity and the upper end of the pull pin is exposed from the containing cavity, a driving part is arranged at the lower end of the pull pin, and the driving part abuts against the surface of the lock tongue;

[0012] A positioning sleeve, the positioning sleeve is sleeved on the guide cylinder, and a lock rod is arranged in the positioning sleeve, the lock rod passes through the slot hole and is arranged in the guide cylinder;

[0013] The unlocking mechanism has a locking state and an unlocking state. In the locking state, the locking hook hooks the circumferential surface of the lock rod from the side of the lock rod away from the driving part, and the surface of the lock tongue on the side of the driving part gradually inclines downward from top to bottom away from the driving part.

[0014] In the unlocking state, as the pull pin is driven to move upward relative to the lock tongue, the part of the driving part in contact with the lock tongue moves upward, thereby driving the lock tongue to rotate and causing the locking hook to swing away from the side of the driving part to separate from the lock rod.

[0015] In an embodiment, the unlocking base is configured to move away from the positioning sleeve and drive the folding rod set to swing upward in the unlocking state by sliding the guide cylinder upward relative to the positioning sleeve, thereby pulling each support seat to close to the unlocking mechanism to achieve folding.

[0016] In an embodiment, the unlocking base further includes a spring arranged in the accommodation cavity, one end of which is fixed to the inner wall of the accommodation cavity, and the other end is connected to the surface on the side of the lock tongue away from the driving part; for reducing the swing speed when the locking hook swings away from the side of the driving part in the unlocking state, and for restoring the length and pushing the lock tongue to swing reversely toward the driving part when the unlocking base moves upward and the lock tongue exceeds the height of the lock rod, thereby reversely driving the pull pin to move downward to reset.

[0017] In an embodiment, the lower surface of the locking hook forms an inclined guide surface on the side toward the driving part.

[0018] In an embodiment, the top of the pull pin is provided with a pull ring, and in the locking state, the upper end surface of the pull ring is flush with the upper surface of the unlocking base.

[0019] In an embodiment, the slot hole is long and extends up and down, and the width is slightly larger than the diameter of the lock rod; for guiding the guide cylinder to move up and down by cooperating the circumferential surface of the lock rod with the slot hole in the unlocking state.

[0020] In an embodiment, the upper part of the lock tongue extends into the accommodating cavity of the lower part of the pull pin, and the pull pin is provided with an upper and lower extending long slot; one end of the fixed shaft is fixed to the inner wall of the accommodation space, and the other end sequentially passes through the long slot and the mounting hole of the upper part of the lock tongue.

[0021] In an embodiment, the long slot extends up and down, and the width is slightly larger than the diameter of the fixed shaft, for guiding the pull pin to move upward by cooperating the circumferential surface of the fixed shaft with the long slot.

[0022] In one embodiment, the pull pin is cylindrical, and the accommodating cavity is cylindrical.

[0023] In one embodiment, the folding rod set comprises a first folding rod and a second folding rod, two ends of the first folding rod are respectively hinged to the support seat and the unlocking base, one end of the second folding rod is hinged to the rod body surface of the first folding rod close to the unlocking base, and the other end is hinged to the surface of the positioning sleeve.

[0024] In one embodiment, two auxiliary rods are further included, which are symmetrically arranged on the two sides of the unlocking base, one end of the auxiliary rod is connected to the unlocking base, and the other end abuts against the ground.

[0025] In one embodiment, each support seat is connected to the upper mounting sleeve through a vertical rod, a plurality of vertical rods are vertically arranged side by side, and a handrail assembly is arranged between adjacent mounting sleeves, the handrail assembly comprises:

[0026] a joint connecting piece, two first sliding grooves are symmetrically arranged on the upper part of the joint connecting piece, and the distance between the two first sliding grooves gradually increases from top to bottom;

[0027] an upper surrounding rod, which is arranged on the two sides of the joint connecting piece and has two ends, a first guide pin is arranged on the rod body of the end of the two upper surrounding rods close to each other, the first guide pin is embedded and can slide along the first sliding groove, and the end of the two upper surrounding rods away from each other is rotationally connected to the mounting sleeve;

[0028] a lower surrounding rod, which is arranged below one of the upper surrounding rods and has two ends, the end of the two lower surrounding rods close to each other is rotationally connected to the joint connecting piece, and the end of the two lower surrounding rods away from each other is rotationally connected to the mounting sleeve;

[0029] When the folding bed is unfolded, the first guide pin is arranged at the top of the first sliding groove; when the folding bed is folded, the first guide pin slides to the bottom of the first sliding groove.

[0030] In one embodiment, the angle between the first sliding groove and the horizontal plane is 45-60°.

[0031] In one embodiment, the length of the first sliding groove is 3-5 mm.

[0032] In one embodiment, the joint connecting piece is provided with a second sliding groove on the side opposite to the two first sliding grooves, the rod body of the upper surrounding rod is provided with a second guide pin, and the second guide pin is slidably embedded in the second sliding groove.

[0033] When the armrest structure is unfolded, the second guide pin is arranged at one end of the second sliding groove close to the first sliding groove; when the armrest structure is folded, the second guide pin slides away from the one end of the first sliding groove.

[0034] In one embodiment, the second sliding groove extends horizontally.

[0035] An operation method of a folding play bed, comprising the following steps:

[0036] In the locked state, the locking hook of the locking tongue in the unlocking base hooks the circumferential surface of the locking rod from the side of the driving part of the locking rod away from the locking tongue, at this time, the surface of the locking tongue on the side of the driving part gradually inclines from top to bottom in the direction away from the driving part;

[0037] In the unlocked state, the driving of the pull pin in the unlocking base is upward relative to the locking tongue, so that the part of the driving part in contact with the locking tongue is moved upward, thereby driving the locking tongue to rotate and making the locking hook swing away from the side of the driving part to separate from the locking rod;

[0038] In the unlocked state, the unlocking base is operated to be lifted upward, so that the guide cylinder slides upward relative to the positioning sleeve to control the unlocking base to move away from the positioning sleeve, at the same time, the unlocking base drives the folding rod group to swing upward, thereby pulling each support seat to move close to the unlocking base to realize folding.

[0039] The folding play bed and the operation method have at least the following beneficial technical effects:

[0040] (1) In the embodiment, the locking hook hooks the circumferential surface of the locking rod from the side of the driving part of the locking rod away from the locking tongue, which can achieve firm locking of the unfolded bed body, and the bed body will not shake or easily fold and deform in shape when unfolded and used, which can ensure the safety in use. Only the pull pin needs to be lifted to be unlocked, which is convenient and fast to operate; in the unlocked state, the pull pin is lifted upward to slide and apply force to the locking tongue through the inclined surface of the locking tongue when the driving part of the pull pin moves upward, so that the locking tongue swings to separate the locking hook from the locking rod, which realizes the conversion of the force in the vertical direction into the driving force in the horizontal direction, and the design is ingenious, the unlocking operation is simple and not laborious, and the operation efficiency is high.

[0041] (2) The unlocking base and the positioning sleeve of the embodiment are inserted and connected to be locked, which is simple in structure; the folding rod group is hingedly connected to the unlocking base and the support seat, which is convenient for linkage and realization of flexible unfolding and folding of the bed body. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The unfolding schematic view of the folding play bed provided by the embodiment of the present application is shown in the figure;

[0043] Figure 2 Fig. 1 is a perspective view of a folding playpen in an unfolded state; Figure 1 Fig. 2 is an enlarged view of the unlocking base in the folding playpen;

[0044] Figure 3 Fig. 3 is a perspective view of the folding playpen in a folded state; Figure 1 Fig. 4 is an enlarged view of the middle handrail assembly;

[0045] Figure 4 Fig. 5 is a process diagram of the folding playpen in an unfolding state;

[0046] Figure 5 Fig. 6 is a process diagram of the folding playpen in a folding state; Figure 4

[0047] Fig. 7 is an enlarged view of A in Fig. 6; Figure 6 Figure 5 Fig. 8 is a diagram of the cooperation between the pull pin and the locking tongue;

[0048] Figure 7 Fig. 9 is a diagram of the folding playpen in a fully folded state;

[0049] Fig. 10 is a diagram of the unlocking mechanism;

[0050] 10, unlocking mechanism;

[0051] 11, unlocking base; 111, hinged hole; 112, guide cylinder; 112a, slot hole; 113, accommodating cavity; 114, spring;

[0052] 12, locking tongue; 121, fixed shaft; 122, locking hook; 122a, inclined guide surface; 123, fixed column;

[0053] 13, pull pin; 131, driving part; 132, pull ring; 133, accommodating cavity; 134, long slot;

[0054] 14, positioning sleeve; 141, locking rod;

[0055] 20, folding rod group; 21, first folding rod; 22, second folding rod;

[0056] 30, support base;

[0057] 40, auxiliary rod;

[0058] 50, vertical rod;

[0059] 60, mounting sleeve;

[0060] 100, joint connector; 110, first sliding groove; 120, second sliding groove;

[0061] 200, upper surrounding rod; 210, first guide pin; 220, second guide pin;

[0062] 300, lower surrounding rod. DETAILED DESCRIPTION​

[0063] The present application will be further described with reference to the drawings.

[0064] For the purposes of promoting an understanding of the principles of the application, reference will now be made to various embodiments illustrated in the drawings and specific language will be used to describe the same. It will, nevertheless, be understood that no limitation of the scope of the application is intended by illustrative discussion of the various embodiments. Thus, it is to be understood that the application can assume alternative forms of embodiment and that they can each be comprised of any combination of the features presented in the above description and / or shown in the drawings. Furthermore, the application can take any number of forms other than the embodiments specifically described and of combinations of these embodiments. Accordingly, the application is not to be limited in scope by the specific embodiments described herein, but is to be construed as broadly as the language and terms used allow.

[0065] It will be apparent to one of ordinary skill in the art that the following description of various embodiments of the application is provided for illustrative purposes only, and that the application is not limited to the embodiments described.

[0066] Throughout this application the word "comprise", and variations such as "comprising" or "comprises", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers. Features, integers or characteristics described in conjunction with a particular aspect, embodiment or example of the application are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith or as otherwise indicated.

[0067] It is to be understood that the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. The terms "comprise", "comprises" and "comprising" and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense, unless the context dictates otherwise. Additionally, the terms "comprise", "comprises" and "comprising" and the like can allow for items, components or elements of a general description to be present or be incorporated with other devices, systems or methods that are not within the scope of the general description. Furthermore, the terms "comprise", "comprises" and "comprising" and the like as used herein are to be interpreted as specifying the presence of the stated features, integers, components or elements but not to preclude the presence or addition of one or more other features, integers, components, elements or groups thereof.

[0068] In the present application, the term "or" as used in a phrase such as "A or B" can be interpreted in the inclusive sense, i.e. "A or B" can mean A or B, or both A and B.

[0069] It should be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present; when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present.

[0070] The terms "upper", "lower", "left", "right", and the like are used herein only to denote relative positions, and when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0072] As shown in FIG. 1, an embodiment of the present application provides a foldable playpen, which comprises: Figures 1-2

[0073] A plurality of support seats 30 are each hingedly connected to the unlocking mechanism 10 arranged in the middle through the folding rod set 20.

[0074] The unlocking mechanism 10 comprises:

[0075] An unlocking base 11 is provided with a hinge hole 111 for connecting the folding rod set 20, and a guide cylinder 112 extending upward and downward is arranged at the lower part of the unlocking base 11. A slot hole 112a is formed in the cylinder wall of the guide cylinder 112 for the lock rod 141 to pass through. An accommodating cavity 113 extending in the upward and downward direction is formed in the unlocking base 11.

[0076] A lock tongue 12 is rotatably arranged on a fixed shaft 121 in the accommodating cavity 113, and a locking hook 122 is arranged at the lower end of the lock tongue 12.

[0077] A pull pin 13 is arranged in the accommodating cavity 113 and the upper end of the pull pin 13 is exposed from the accommodating cavity 113. A driving part 131 is arranged at the lower end of the pull pin 13, and the driving part 131 abuts against the surface of the lock tongue 12.

[0078] A positioning sleeve 14 is sleeved on the guide cylinder 112, and a lock rod 141 is arranged in the positioning sleeve 14. The lock rod 141 passes through the slot hole 112a and is arranged in the guide cylinder 112. ​

[0079] The unlocking mechanism 10 has a locked state and an unlocked state, in Figures 1-2 In the locked state, the locking hook 122 hooks the circumferential surface of the lock rod 141 from the side of the lock rod 141 away from the driving part 131, and the surface of the lock tongue 12 on the side of the driving part 131 gradually inclines downwardly away from the driving part 131;

[0080] As Figures 4-5 In the unlocked state, as the pull pin 13 is driven to move upward relative to the lock tongue 12, the part of the driving part 131 in contact with the lock tongue 12 moves upward, thereby driving the lock tongue 12 to rotate and causing the locking hook 122 to swing away from the side of the driving part 131 to separate from the lock rod 141;

[0081] At this time, as Figure 5 The unlocking base 11 is configured to move away from the positioning sleeve 14 and cause the folding rod set 20 to swing upward in the unlocked state by the upward sliding of the guide cylinder 112 relative to the positioning sleeve 14, thereby pulling each support base 30 to approach the unlocking base 11 to achieve folding.

[0082] Specifically, the locking hook 122 hooks the circumferential surface of the lock rod 141 from the side of the lock rod 141 away from the driving part 131, which can achieve firm locking of the unfolded state of the bed body. The bed body does not shake or easily fold and deform in shape during use, which can ensure safety in use. Only the pull pin 13 needs to be lifted to unlock, which is convenient and fast to operate. In the unlocked state, the pull pin 13 is lifted upward during operation, the driving part 131 of the pull pin 13 slides against the inclined surface of the lock tongue 12 when moving upward and applies force to the lock tongue 12 to cause the lock tongue 12 to swing and separate the locking hook 122 from the lock rod 141, which converts the vertical force into horizontal driving force, which is a clever design, simple to unlock and not laborious, and has high operation efficiency.

[0083] The unlocking base 11 of the embodiment is inserted and locked with the positioning sleeve 14, which is simple in structure; the folding rod set 20 is hingedly connected with the unlocking base 11 and the support base 30, which facilitates linkage and flexible unfolding and folding of the bed body.

[0084] Reference Figure 2 In some embodiments, the unlocking base 11 further includes a spring 114 arranged in the accommodation cavity 113, one end of which is fixed to the inner wall of the accommodation cavity 113, and the other end is connected to the surface of the lock tongue 12 on the side away from the driving part 131; for Figure 5After unlocking, when the locking hook 122 swings away from the driving part 131, it is contracted to reduce the swing speed; and when the unlocking base 11 moves upward and the lock tongue 12 exceeds the height of the lock rod 141, it restores the length and pushes the lock tongue 12 to swing reversely toward the driving part 131, thereby reversely driving the pull pin 13 to move downward to reset.

[0085] Specifically, the spring 114 can be extruded and shortened to store elastic potential energy when the locking hook 122 swings during unlocking, which buffers the swing of the lock tongue 12 and avoids the lock tongue 12 from colliding with the inner wall of the accommodating cavity 113 due to too fast swing, causing part wear; when the unlocking base 11 moves upward and the lock tongue 12 exceeds the height of the lock rod 141, the spring 114 pushes the lock tongue 12 to swing reversely toward the driving part 131, and when the lock tongue 12 swings reversely, the inclined surface on the side of the lock tongue 12 toward the driving part 131 moves relative to the driving part 131 and exerts force on the driving part 131, and as the contact position between the two moves downward, the pull pin 13 is reversely driven to move downward to reset to the initial position, so that the pull pin 13 and the lock tongue 12 are automatically and quickly reset after the unlocking action by the spring 114, which ensures the normal implementation of the next unlocking operation after resetting, thereby avoiding the situation that the next unlocking operation cannot be implemented due to failure to reset normally, and avoiding the trouble and delay of manual resetting.

[0086] Further, referring to Figure 2 and Figure 5 , the lower surface of the locking hook 122 forms an inclined guide surface 122a on the side toward the driving part 131. Specifically, when the unlocking base 11 moves upward and the lock tongue 12 exceeds the height of the lock rod 141, the spring 114 drives the lock tongue 12 to reset so that the lock tongue 12 is located directly above the lock rod 141, and if the bed body is unfolded again and the unlocking base 11 drives the lock tongue 12 to move downward, the inclined guide surface 122a will contact and slide relative to the circumferential surface of the lock rod 141, thereby sliding downward to be hooked and locked by the locking hook 122, at which time the locking state is achieved. The design of the present embodiment is beneficial to the unlocking mechanism 10 to smoothly and accurately achieve the locking state after the bed body is unfolded again, avoiding the situation that the locking hook 122 and the lock rod 141 are stuck and cannot be relocked.

[0087] Referring to Figure 2 , in some embodiments, the surface on the side of the lock tongue 12 away from the driving part 131 is provided with a fixed column 123 for sleeving the end of the spring 114. In the present embodiment, the spring 114 is sleeved on the fixed column 123 to be connected with the lock tongue 12, which is convenient for firmly installing the spring 114 and also facilitates disassembly during maintenance.

[0088] Referring to Figure 2In some embodiments, the top of the pull pin 13 is provided with a pull ring 132, and in the locked state, the upper end surface of the pull ring 132 is flush with the upper surface of the unlocking base 11.

[0089] The pull ring 132 is convenient to hold by hand when folding to drive the pull pin 13 to move upward relative to the unlocking base 11; and in the locked state, the upper end surface of the pull ring 132 is flush with the upper surface of the unlocking base 11, which can hide the pull ring 132, avoid accidental touching and pulling the pull ring 132 to cause accidental unlocking, and further cause safety accidents.

[0090] Reference Figure 5 In some embodiments, the slot hole 112a is long and extends up and down, and the width is slightly larger than the diameter of the lock rod 141; for guiding the upward and downward movement of the guide cylinder 112 by the cooperation of the circumferential surface of the lock rod 141 and the slot hole 112a in the unlocked state.

[0091] Specifically, the slot hole 112a of the embodiment not only allows the lock rod 141 to pass from the outside into the guide cylinder 112, but also extends up and down and has a width slightly larger than the diameter of the lock rod 141, which allows the lock rod 141 and the slot hole 112a to move up and down in the standard vertical direction, providing accurate guidance for the vertical movement of the guide cylinder 112, avoiding the movement direction of the unlocking base 11 to be skewed, and causing the folding action to fail.

[0092] Reference Figure 6 In some embodiments, the upper part of the lock tongue 12 extends into the accommodating cavity 133 of the lower part of the pull pin 13, and the pull pin 13 is provided with a long slot 134 extending up and down; one end of the fixed shaft 121 is fixed to the inner wall of the accommodating space, and the other end sequentially passes through the long slot 134 and the mounting hole in the upper part of the lock tongue 12.

[0093] On the one hand, the upper part of the lock tongue 12 can be rotatably mounted on the fixed shaft 121 arranged in the accommodating cavity 113; on the other hand, when the unlocking starts to pull the pull pin 13 upward, the long slot 134 of the pull pin 13 can translate upward relative to the fixed shaft 121, so that the pull pin 13 moves upward as a whole relative to the lock tongue 12, realizing the operation of pulling the pull pin 13 upward to unlock without moving the lock tongue 12.

[0094] Reference Figure 6In some embodiments, the long slot 134 extends upward and downward, and has a width slightly larger than the diameter of the fixed shaft 121, so as to guide the upward movement of the pull pin 13 by matching the long slot 134 with the circumferential surface of the fixed shaft 121. Specifically, the long slot 134 of the present embodiment, which extends upward and downward and has a width slightly larger than the diameter of the fixed shaft 121, can make the long slot 134 and the fixed shaft 121 move upward and downward in the standard vertical direction, thereby providing accurate guidance for the vertical movement of the pull pin 13 and avoiding the movement direction of the pull pin 13 from being skewed, which can cause unlocking failure.

[0095] Referring to Figure 6 In some embodiments, the pull pin 13 is cylindrical, and the accommodating cavity 113 is also cylindrical. The cylindrical accommodating cavity 113 can provide accurate guidance for the upward and downward movement of the pull pin 13, and also provides assembly redundancy, that is, even if the pull pin 13 rotates relatively around the axis, it will not affect the normal execution of the unlocking action.

[0096] Referring to Figure 5 In some embodiments, the folding rod set 20 includes a first folding rod 21 and a second folding rod 22. The two ends of the first folding rod 21 are respectively hinged to the support seat 30 and the unlocking base 11. One end of the second folding rod 22 is hinged to the surface of the first folding rod 21 close to the unlocking base 11, and the other end is hinged to the surface of the positioning sleeve 14.

[0097] When the guiding cylinder 112 slides upward relative to the positioning sleeve 14 to move the unlocking base 11 away from the positioning sleeve 14 in the unlocked state, the first folding rod 21 swings upward and pulls each support seat 30 and vertical rod 50 to move close to the unlocking mechanism 10, thereby achieving the folding of the folding bed body. At the same time, the end of the second folding rod 22 connected to the surface of the positioning sleeve 14 swings downward, so that the second folding rods 22 symmetrically arranged on both sides of the positioning sleeve 14 or distributed around the circumferential surface of the positioning sleeve 14 can cooperate with each other to jointly ensure the stability of the positioning sleeve 14, thereby avoiding shaking or axis swing.

[0098] When the bed body is unfolded, the lower unlocking mechanism 10 has poor support performance and is prone to shaking. Referring to Figure 1 In some embodiments, two auxiliary rods 40 are further included, which are symmetrically arranged on both sides of the unlocking base 11. One end of the auxiliary rod 40 is connected to the unlocking base 11, and the other end abuts against the ground. The auxiliary rod 40 plays a role of auxiliary support, which can improve the support performance of the lower part of the bed body, so that the folding bed does not shake during use. The auxiliary rod 40 can also cooperate with the four-cornered support seat 30 to bear force, so that the stress of the lower part of the bed body is evenly distributed, and even if a game mattress is placed on the lower unlocking mechanism 10, the support can still be stable and smooth.

[0099] The existing storable children's bed is harsh in the angle deformation between the components when folding, and it is difficult to compress the bed body, and the connecting parts of the rod are easily broken or worn. Figures 1-3 In some embodiments, each support seat 30 is connected to the upper mounting sleeve 60 through a vertical rod 50, a plurality of vertical rods 50 are arranged vertically, and a handrail assembly is arranged between adjacent mounting sleeves 60, the handrail assembly comprises:

[0100] The joint connecting piece 100 is symmetrically provided with two first sliding grooves 110 near the upper part, and the distance between the two first sliding grooves 110 gradually increases from top to bottom;

[0101] The upper surrounding rod 200 is provided with two rods located on both sides of the joint connecting piece 100, and the rod bodies of the two ends of the two upper surrounding rods 200 close to each other are provided with first guide pins 210, the first guide pins 210 are embedded and can slide along the first sliding grooves 110; the ends of the two upper surrounding rods 200 away from each other are rotationally connected with the mounting sleeves 60;

[0102] The lower surrounding rod 300 is provided with two rods arranged side by side below one upper surrounding rod 200, and the ends of the two lower surrounding rods 300 close to each other are respectively rotationally connected with the joint connecting piece 100, and the ends of the two lower surrounding rods 300 away from each other are respectively rotationally connected with the mounting sleeves 60;

[0103] When the folding bed is unfolded, the first guide pin 210 is placed at the top of the first sliding groove 110; when the folding bed is folded, the first guide pin 210 slides to the bottom of the first sliding groove 110.

[0104] Reference Figure 4 And Figure 5 When the unlocking base 11 is unlocked, the folding bed frame is folded, the unlocking base 11 is held by hand and lifted upward, at this time the guide cylinder 112 slides upward relative to the positioning sleeve 14, so that the unlocking base 11 moves away from the positioning sleeve 14, and drives the folding rod group 20 to swing upward, and then pulls each support seat 30 to move close to the unlocking mechanism 10, at this time the lower parts of the four vertical rods 50 are pulled inward; because the length of the lower surrounding rod 300 is always unchanged, when the lower part of the vertical rod 50 is inwardly retracted, the upper part of the vertical rod 50 will expand outward, the upper part of the vertical rod 50 will pull the upper surrounding rod 200 to move outward through the mounting sleeve 60, when the upper surrounding rod 200 moves outward, the first guide pin 210 moves outward and downward along the first sliding groove 110, so that the upper surrounding rod 200 starts to fold, and the joint connecting piece 100 gradually falls under the inward retraction of the vertical rod 50; as the joint connecting piece 100 gradually falls, the connecting end of the lower surrounding rod 300 relative to the joint connecting piece 100 rotates and folds;

[0105] Reference Figure 7 When the unlocking base 11 is lifted to the highest position, the first guide pin 210 slides to the bottom of the first sliding groove 110, the articulated joint 100 and the lower surrounding rod 300 are lowered to the lowest position, and the entire bed body is also folded and contracted.

[0106] The connection part of the upper surrounding rod 200 and the articulated joint 100 in the embodiment is a sliding connection, so that the upper surrounding rod 200 of the folding bed has sufficient moving clearance when changing from unfolding to folding deformation, so that flexible deformation can be realized. Since the bed body is easy to deform, it does not need to consume a lot of effort to compress the bed body, and it can also avoid the breakage of the rod caused by a large force or the wear of the connected parts.

[0107] Reference Figure 3 And Figure 5 In some embodiments, the included angle between the first sliding groove 110 and the horizontal plane is 45-60°.

[0108] Specifically, the included angle of 45-60° between the first sliding groove 110 and the horizontal plane cannot be too small to cause the first guide pin 210 to move downward along the first sliding groove 110 by an insignificant distance when folding, and the first guide pin 210 moving downward along the first sliding groove 110 by a suitable distance when folding can ensure that the folding function is normally realized; the included angle cannot be too large to cause the first guide pin 210 to move downward along the first sliding groove 110 by too large a distance when folding, so as to ensure that the folding speed is not too fast.

[0109] Reference Figure 3 And Figure 5 In some embodiments, the length of the first sliding groove 110 is 3-5mm.

[0110] Specifically, the length of 3-5mm of the first sliding groove 110 cannot be too small to cause insufficient activity clearance, so as to ensure the freedom of movement of the upper surrounding rod 200 when folding; and the length cannot be too large to cause waste of the length of the activity clearance, so as to ensure that the articulated joint 100 itself has sufficient structural strength.

[0111] Reference Figure 3 In some embodiments, the articulated joint 100 is provided with a second sliding groove 120 on one side of the two first sliding grooves 110 opposite to each other, and the rod body of the upper surrounding rod 200 is provided with a second guide pin 220, and the second guide pin 220 is slidingly embedded in the second sliding groove 120.

[0112] Reference Figure 3 When the armrest structure is unfolded, the second guide pin 220 is placed at one end of the second sliding groove 120 close to the first sliding groove 110; with reference to Figure 5 When the armrest structure is folded, the second guide pin 220 slides away from the end of the first sliding groove 110.

[0113] During folding, the mounting sleeve 60 pulls the upper enclosure bar 200 outward, which in turn drives the first guide pin 210 to gradually move outward and downward along the first slide groove 110. At this time, the second guide pin 220 slides outward along the second slide groove 120. The coordinated second guide pin 220 and second slide groove 120 of this embodiment ensure smoother movement of the upper enclosure bar 200 during folding, thereby further stabilizing the folding process of the bed.

[0114] refer to Figure 3 and Figure 5 In some embodiments, the second chute 120 is horizontally extended. The horizontally extended second chute 120 allows the end of the upper enclosure bar 200 connected to the joint connector 100 to always move outward in the horizontal direction when folded.

[0115] In the above description, although expressions such as "first" and "second" may be used to describe various elements of the present invention, they are not intended to limit the corresponding elements. For example, the above expressions are not intended to limit the order or importance of the corresponding elements. The above expressions are used to distinguish one component from another.

[0116] The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. A singular expression includes a plural expression unless there is a significant difference in context or scheme between them.

[0117] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the appended claims.

[0118] Those skilled in the art will understand that the various technical features of the above-described embodiments may be omitted, added, or combined in any manner accordingly. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, and simple transformation methods that can be thought of by those skilled in the art, as well as solutions for making adaptive and functional structural transformations of existing technologies, should be considered to be within the scope of this specification.

[0119] The above-described embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but should not be understood as a limitation on the patent scope of the present application. It should be noted that although the present application has been shown and described with reference to various embodiments, for those skilled in the art, various modifications and improvements can be made in form and details without departing from the concept of the present application, and these all belong to the protection scope of the present application defined by the appended claims. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A foldable playard, comprising: a plurality of support seats, each of the support seats being hingedly connected to an intermediate unlocking mechanism by a set of folding rods; the unlocking mechanism comprising: an unlocking base, the unlocking base being provided with a hinge hole for connecting the set of folding rods, a lower portion of the unlocking base being provided with an upwardly and downwardly extending guide cylinder, a cylinder wall of the guide cylinder being provided with a slot hole for a lock rod to pass through, the unlocking base being formed with an accommodating cavity extending in an upward and downward direction; a lock tongue, an upper end of the lock tongue being rotatably provided on a fixed shaft in the accommodating cavity, and a lower end portion of the lock tongue being provided with a locking hook; a pull pin, the pull pin being provided in the accommodating cavity and an upper end of the pull pin being exposed from the accommodating cavity, a lower end of the pull pin being provided with a driving portion, the driving portion abutting against a surface of the lock tongue; a positioning sleeve, the positioning sleeve being sleeved on the guide cylinder, and the positioning sleeve being provided with a lock rod, the lock rod passing through the slot hole to be inserted into the guide cylinder; the unlocking mechanism having a locking state and an unlocking state, in the locking state, the locking hook hooks the circumferential surface of the lock rod from a side of the lock rod away from the driving portion, and a surface of the lock tongue on a side of the driving portion gradually inclines away from the driving portion from top to bottom; in the unlocking state, as the pull pin is driven to move upward relative to the lock tongue, the driving portion moves upward at a position where the driving portion contacts the lock tongue, thereby driving the lock tongue to rotate and causing the locking hook to swing away from the side of the driving portion to separate from the lock rod; the unlocking base is configured to, in the unlocking state, slide upward relative to the positioning sleeve through the guide cylinder to move the unlocking base away from the positioning sleeve, while causing the set of folding rods to swing upward, thereby pulling each support seat to move close to the unlocking mechanism to achieve folding. the unlocking base further comprises a spring, the spring being provided in the accommodating cavity, one end of the spring being fixed to an inner wall of the accommodating cavity, and the other end of the spring being connected to a side surface of the lock tongue opposite to the driving portion; for reducing the swinging speed when the locking hook swings away from the side of the driving portion in the unlocking state, and for restoring the length of the spring and pushing the lock tongue to swing reversely toward the driving portion when the unlocking base moves upward and the lock tongue exceeds the height of the lock rod, thereby reversely driving the pull pin to move downward to reset.

2. The foldable playard according to claim 1, wherein a lower surface of the locking hook is formed with an inclined guide surface on a side toward the driving portion.

3. The foldable playard according to claim 1, wherein a top portion of the pull pin is provided with a pull ring, in the locking state, an upper end surface of the pull ring is flush with an upper surface of the unlocking base.

4. The foldable playard according to claim 1, wherein the slot hole is in a strip shape and extends upward and downward, and a width of the slot hole is slightly greater than a diameter of the lock rod; for guiding the guide cylinder to move upward and downward in the unlocking state through cooperation between the circumferential surface of the lock rod and the slot hole.

5. The foldable playard according to claim 1, wherein ​ The upper part of the lock tongue extends into the accommodating cavity of the lower part of the pull pin, and the pull pin is provided with an upper and lower extending long slot; one end of the fixed shaft is fixed to the inner wall of the accommodating cavity, and the other end sequentially passes through the long slot and the mounting hole of the upper part of the lock tongue.

6. The folding playard of claim 5, wherein, The long slot extends upward and downward, and the width is slightly larger than the diameter of the fixed shaft, so as to guide the upward movement of the pull pin through the cooperation between the long slot and the circumferential surface of the fixed shaft.

7. The folding playard of claim 1, wherein, The pull pin is cylindrical, and the accommodating cavity is cylindrical.

8. The folding playard of claim 1, wherein, The folding rod set comprises a first folding rod and a second folding rod, two ends of the first folding rod are respectively hinged to the support seat and the unlocking base, one end of the second folding rod is hinged to the rod body surface of the first folding rod close to the unlocking base, and the other end is hinged to the surface of the positioning sleeve.

9. The folding playard of claim 1, wherein, It further comprises two auxiliary rods, which are symmetrically arranged on the two sides of the unlocking base, one end of the auxiliary rod is connected to the unlocking base, and the other end abuts against the ground.

10. The folding playard of claim 1, wherein, Each support seat is connected to the upper mounting sleeve through a vertical rod, a plurality of vertical rods are vertically arranged side by side, and a handrail assembly is arranged between adjacent mounting sleeves, the handrail assembly comprises: The joint connecting piece is symmetrically provided with two first sliding grooves close to the upper part, and the distance between the two first sliding grooves gradually increases from top to bottom; Two upper surrounding rods are arranged on the two sides of the joint connecting piece, and a first guide pin is arranged on the rod body of one end of the two upper surrounding rods close to each other, the first guide pin is embedded and can slide along the first sliding groove; the other end of the upper surrounding rod is rotationally connected with the mounting sleeve; Two lower surrounding rods are arranged side by side below one upper surrounding rod, and one end of the two lower surrounding rods close to each other is rotationally connected with the joint connecting piece, and the other end away from each other is rotationally connected with the mounting sleeve; When the folding bed is unfolded, the first guide pin is arranged at the top of the first sliding groove; when the folding bed is folded, the first guide pin slides to the bottom of the first sliding groove.

11. The folding playard of claim 10, wherein, The included angle between the first sliding groove and the horizontal plane is 45-60°.

12. The folding playard of claim 10, wherein, The length of the first sliding groove is 3-5mm.

13. The folding playard of claim 10, wherein, The joint connecting piece is provided with a second sliding groove on the side away from each other of the two first sliding grooves, and a second guide pin is arranged on the rod body of the upper surrounding rod, the second guide pin is slidably embedded in the second sliding groove. When the armrest structure is unfolded, the second guide pin is disposed at one end of the second sliding groove close to the first sliding groove; when the armrest structure is folded, the second guide pin slides away from the one end of the first sliding groove.

14. The foldable playard of claim 13, wherein: the second sliding groove is disposed horizontally.

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