Folding joint and child bed

Abstract

The folding joint comprises a joint seat, a first supporting frame, a second supporting frame, a first surrounding frame and a second surrounding frame, wherein the first supporting frame and the second supporting frame are pivoted with the upper part of the joint seat; the surrounding frame is provided with driving grooves, the supporting frames are provided with pins inserted into the corresponding driving grooves, and when the supporting frames are relatively folded and unfolded, the pins rotate and slide in the driving grooves to drive the surrounding frame to be synchronously folded and unfolded. The folding joint changes a single pivoting folding mode, the motion trail of parts is reasonable, the size is small after folding, and the space utilization rate is high. The matched child bed is provided with two folding joints, a linkage bed head frame, a bed tail frame and a support, the bed body is integrally and synchronously folded and unfolded in cooperation with a front bottom plate frame and a rear bottom plate frame which are pivoted through multiple shafts, and operation is convenient and fast; an unfolding stabilizing mechanism is arranged, so that the bed body is prevented from being folded by mistake after being unfolded, the structural stability and the use safety are improved, and the supporting structure is more stable after being unfolded.

Description

Technical Field

[0001] This invention belongs to the field of children's products technology, specifically relating to a folding joint and a children's bed. Background Technology

[0002] Children's beds are essential items for raising children, but because of their large size, most children's beds are designed to be foldable to facilitate carrying and storage. With the rapid development of the market, in the field of children's products technology, users are no longer satisfied with children's beds having basic folding and protective functions. Users are increasingly demanding more ease of operation, structural stability, and space utilization of folding beds.

[0003] Existing technologies include various foldable children's beds and matching folding joint structures, such as the support joint device disclosed in patent CN114052436B. This device uses the pivoting of the folding joint in conjunction with the support rod to form a four-bar linkage mechanism to achieve folding and drive the bed to fold synchronously. However, such structures mostly rely on a single pivoting folding method to achieve bed folding. The design of the frame and support frame is simple, and the movement trajectory of each component is limited during folding. The overall volume is still large after folding, and the structural stability after unfolding also depends on the friction limit of the elastic boss. Long-term use can easily lead to limit failure.

[0004] Meanwhile, the base frame of existing foldable children's beds is mostly one-piece or simply hinged. When unfolded, the base frame lacks sufficient support stability, and it cannot be folded in sync with the bed frame, requiring separate operation, which increases the inconvenience of use.

[0005] In addition, some folding children's beds lack a dedicated unfolding and stabilizing mechanism, making them prone to accidental folding when subjected to external force after unfolding, thus their safety and reliability need to be improved.

[0006] Therefore, there is a market demand for a folding joint and children's bed that is simple in structure, easy to operate, stable when unfolded, and has a small overall volume when folded. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a folding joint.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a folding joint, including a joint seat, a first support and a second support pivotally connected at their upper ends to the upper part of the joint seat, and a first frame and a second frame pivotally connected at their lower ends to the lower part of the joint seat. The first frame has a first drive groove, and the second frame has a second drive groove. The first support has a first pin inserted into the first drive groove, and the second support has a second pin inserted into the second drive groove. When the first support and the second support are relatively folded or relatively unfolded based on the joint seat, the first pin is configured to both rotate and slide in the first drive groove, and the second pin is configured to both rotate and slide in the second drive groove, thereby allowing the first frame and the second frame to relatively fold or relatively unfold based on the joint seat.

[0009] In some embodiments, the first drive groove includes a first straight groove segment and a first clearance segment, the centerline of the first straight groove segment being tangent to a circle centered on the rotation axis of the first enclosure; the second drive groove includes a second straight groove segment and a second clearance segment, the centerline of the second straight groove segment being tangent to a circle centered on the rotation axis of the second enclosure; when the first support and the second support are retracted relative to each other based on the joint seat, the first pin moves from the first straight groove segment to the first clearance segment, and the second pin moves from the second straight groove segment to the second clearance segment.

[0010] In some embodiments, the joint seat has a first guide groove and a second guide groove on both sides. The center line of the first guide groove is consistent with or parallel to the circumference line with the first support rotation axis as the center. The center line of the second guide groove is consistent with or parallel to the circumference line with the second support rotation axis as the center. The first pin is inserted in the first guide groove and the second pin is inserted in the second guide groove.

[0011] In some embodiments, the upper ends of the first support frame and the second support frame are coaxially pivoted with the upper part of the joint seat via a first axis; one end of the first frame and one end of the second frame are coaxially pivoted with the lower part of the joint seat via a second axis.

[0012] In some embodiments, when the first support and the second support are deployed relative to each other based on the joint seat, the center line of the first straight groove segment is parallel to or coincides with the center line of the second straight groove segment, and is perpendicular to the line connecting the first axis and the second axis.

[0013] In some embodiments, the first support and the second support, and the first frame and the second frame are respectively symmetrically arranged on both sides of the joint seat.

[0014] In some embodiments, an angle limiting mechanism is provided between the first support and the second support, or between the first support, the second support, and the joint seat, respectively, to limit the extension to the extreme position.

[0015] In some embodiments, the joint seat includes a metal reinforcing plate, the upper ends of the first support and the second support are respectively pivotally connected to the upper part of the reinforcing plate, and one end of the first frame and one end of the second frame are respectively pivotally connected to the lower part of the reinforcing plate.

[0016] Another technical problem to be solved by the present invention is to provide a children's bed with a folding joint including any of the above embodiments.

[0017] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a children's bed, wherein the folding joint has two joints, which are respectively located on the left and right sides of the children's bed; a headboard is fixed between the two first side frames; a footboard is fixed between the two second side frames; a downwardly extending front support is fixed on the two first support frames; a downwardly extending rear support is fixed on the two second support frames; the children's bed also includes a front base frame connected to the front support via a third axis pivot and a rear base frame connected to the rear support via a fourth axis pivot; the front base frame and the rear base frame are connected via a fifth axis pivot; and the children's bed also includes an unfolding stabilizing mechanism.

[0018] In some embodiments, the unfolding stabilizing mechanism is located at the fifth axis pivot connection and includes an unlocking member. When the user pulls the unlocking member upward, the second pin moves from the second straight groove section to the second clearance section, and the front bottom plate frame and the rear bottom plate frame fold upward, causing the first support frame and the second support frame to retract relative to each other.

[0019] The scope of this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this application.

[0020] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The present invention provides a folding joint and a children's bed, wherein the folding joint cooperates with the support frame and the surrounding frame pivotally connected thereto through the joint seat. The support frame uses pins to achieve a linkage that both rotates and slides within the drive groove of the surrounding frame, thereby driving the support frame and the surrounding frame to fold or unfold synchronously. This structural design makes the movement trajectory of each component more reasonable, the overall structure compact, the volume significantly reduced after folding, and the outer contour simple and regular, effectively improving space utilization. The children's bed equipped with this folding joint, through the symmetrically arranged folding joints on both sides linking the headboard, footboard, and various supports, and simultaneously cooperating with the multi-axis pivotally connected front and rear bottom plates, achieves synchronous folding and unfolding of the entire bed, greatly simplifying the folding steps and significantly improving ease of use. In addition, the unfolding stabilizing mechanism at the bottom of the bed can effectively prevent the bed from being accidentally retracted when unfolded by external forces, greatly improving the structural stability and safety of the bed. At the same time, the coordinated design between the components further enhances the support and stability of the children's bed after unfolding. The overall structural design is scientific and reasonable, making it more practical. Attached Figure Description

[0021] Appendix Figure 1 A three-dimensional structural diagram of a children's bed in its unfolded state (Example 1); Appendix Figure 2 A front view of the unfolded structure of a children's bed (Example 1); Appendix Figure 3 A three-dimensional schematic diagram of the folding structure of a children's bed (Example 1); Appendix Figure 4 A front view of the folded structure of a children's bed (Example 1); Appendix Figure 5 A three-dimensional structural diagram of a children's bed in its folded state (Example 1); Appendix Figure 6 A front view of a child's bed in its folded state (Example 1); Appendix Figure 7 This is a schematic diagram of an explosion of a folding joint; Appendix Figure 8 This is a schematic diagram showing the fit between the frame and the joint seat; Appendix Figure 9 This is a schematic diagram of the base plate frame in an explosion. Appendix Figure 10 A three-dimensional structural diagram of a children's bed in its unfolded state (Example 2); Appendix Figure 11 A three-dimensional structural diagram of a children's bed in its folded state (Example 2) Wherein: 1. Joint seat; 11. First guide groove; 12. Second guide groove; 13. Reinforcing plate; 2a. First support frame; 2b. Second support frame; 3a. First enclosure; 3b. Second enclosure; 31. First drive slot; 311. First straight slot section; 312. First clearance section; 32. Second drive slot; 321. Second straight slot section; 322. Second clearance section; 4. Angle limiting mechanism; 5a. Headboard; 5b. Footboard; 6a. Front bracket; 6b. Rear bracket; 7a. Front floor frame; 7b. Rear floor frame; 8. Establish a stable mechanism; D1, First pin; D2, Second pin; X1, First shaft; X2, Second shaft; X3, Third shaft; X4, Fourth shaft; X5, Fifth shaft. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments. The scope of protection of the present invention is not limited to the following embodiments. Any scheme that adopts the structure and principle of the present invention and makes simple changes or equivalent substitutions falls within the scope of protection of the present invention.

[0023] Example 1: As Figure 1-9 The foldable children's bed shown includes two folding joints, which are symmetrically arranged on the left and right sides of the bed. As the core folding support components of the children's bed, the bed can be folded and unfolded as a whole by the synchronous unfolding and folding of the two folding joints.

[0024] This embodiment discloses a folding joint and a foldable children's bed assembled based on the folding joint. The folding joint has a compact structure and good linkage between folding and unfolding. After being adapted for use with a children's bed, it can realize the synchronous folding and unfolding of the entire bed. It is easy to operate and has strong structural stability after unfolding. After folding, the volume is greatly reduced, improving space utilization and safety.

[0025] like Figure 7-8 As shown, the specific structure of the folding joint is as follows: The folding joint includes a joint seat 1, a first support frame 2a, a second support frame 2b, a first enclosure frame 3a and a second enclosure frame 3b made of aluminum alloy, steel or plastic parts, taking into account both structural strength and lightweight requirements, and adapting to the usage scenarios and load-bearing requirements of children's beds.

[0026] The joint seat 1 has a metal reinforcing plate 13 to ensure that the pivot point does not deform during long-term use. The metal reinforcing plate 13 is made of stainless steel or cold-rolled steel sheet by stamping. For aesthetic purposes and to accommodate the inner ends of the first frame 3a and the second frame 3b, while avoiding structural exposure and ensuring safety, the joint seat 1 also has a plastic outer shell. The metal reinforcing plate 13 is located on the outer center of the plastic shell.

[0027] The upper ends of the first support 2a and the second support 2b are respectively connected to the upper pivot of the reinforcing plate 13. One end of the first frame 3a and one end of the second frame 3b are respectively located inside the plastic shell and connected to the lower pivot of the reinforcing plate 13. The metal reinforcing plate 13 can effectively disperse the stress at the pivot point, improve the load-bearing capacity and deformation resistance of the joint seat 1, and ensure the long-term stability of the folding joint.

[0028] In this embodiment, the upper ends of the first support frame 2a and the second support frame 2b are coaxially pivoted with the upper part of the joint seat 1 via a first shaft X1, achieving coaxial synchronous rotation of the support frames; one end of the first enclosure frame 3a and one end of the second enclosure frame 3b are coaxially pivoted with the lower part of the joint seat 1 via a second shaft X2, achieving coaxial synchronous rotation of the enclosure frames. This coaxial pivot design simplifies the assembly process of the folding joint, reduces the number of pivot shafts, and ensures the rotational synchronicity of the support frames and enclosure frames, further improving the stability of the linkage during folding and unfolding. Furthermore, to ensure the structural symmetry and motion synchronization of the folding joint, the first support frame 2a and the second support frame 2b, and the first enclosure frame 3a and the second enclosure frame 3b are symmetrically arranged on both sides of the joint seat 1, ensuring uniform stress on each component during folding and unfolding, and avoiding structural deformation or jamming caused by excessive stress on one side.

[0029] The first frame 3a has a first drive groove 31, and the second frame 3b has a second drive groove 32; the first support 2a has a first pin D1 fixed in it, and the first pin D1 is inserted into the first drive groove 31; the second support 2b has a second pin D2 fixed in it, and the second pin D2 is inserted into the second drive groove 32. When an external force drives the first support frame 2a and the second support frame 2b to retract or expand relative to each other based on the joint seat 1, the first pin D1 moves in the first drive groove 31 in a way that both rotates and slides, and the second pin D2 moves in the second drive groove 32 in a way that both rotates and slides simultaneously. Through the rotational and sliding cooperation between the corresponding pins and the drive grooves, the rotational motion of the first support frame 2a and the second support frame 2b relative to the joint seat 1 is converted into a driving force on the first enclosure 3a and the second enclosure 3b respectively. This causes the first enclosure 3a and the second enclosure 3b to retract or expand relative to each other based on the joint seat 1 in a way that achieves the linkage of the support frame and the enclosure, replacing the traditional single pivot folding method and making the movement trajectory of each component more reasonable.

[0030] In this embodiment, the first frame 3a, the first support frame 2a, and the joint seat 1 form a deformable three-bar linkage through the rotational and sliding cooperation of the corresponding pins and drive grooves. Similarly, the second frame 3b, the second support frame 2b, and the joint seat 1 also form a deformable three-bar linkage.

[0031] like Figure 7As shown, the first drive groove 31 includes an integrally connected first straight groove section 311 and a first clearance section 312, and the second drive groove 32 includes an integrally connected second straight groove section 321 and a second clearance section 322. Figure 8 As shown, the centerline of the first straight groove segment 311 is tangent to the circle centered on the rotation axis of the first frame 3a, and the centerline of the second straight groove segment 321 is tangent to the circle centered on the rotation axis of the second frame 3b. This structural design ensures that when the support frame drives the frame to unfold, the corresponding pins both rotate and slide within the straight groove segment, resulting in more efficient transmission of driving force and reduced motion resistance. When the first support frame 2a and the second support frame 2b are retracted to their limit positions relative to each other based on the joint seat 1, the first pin D1 disengages from the first straight groove segment 311 and fully enters the first clearance segment 312, and the second pin D2 disengages from the second straight groove segment 321 and fully enters the second clearance segment 322. At this time, according to the principle of free fall, the first frame 3a and the second frame 3b further move downwards towards each other. The clearance segment provides reserved space for the pin's retraction movement, avoiding structural interference during the retraction of the support frame and the frame, ensuring the smoothness of the folding action, and further reducing the overall volume after the folding joint is closed.

[0032] The joint seat 1 has a first guide groove 11 and a second guide groove 12 on both sides. The center line of the first guide groove 11 is parallel to the circumference line with the rotation axis of the first support 2a as the center, and the center line of the second guide groove 12 is parallel to the circumference line with the rotation axis of the second support 2b as the center. The first pin D1 is inserted into the first guide groove 11 and the second pin D2 is inserted into the second guide groove 12. The guide grooves provide auxiliary restraint for the movement of the pins, further preventing the support from shifting or wobbling during movement, and ensuring the accuracy and synchronization of the folding joint's opening and closing movements.

[0033] When the first support 2a and the second support 2b are extended to their limit positions relative to each other based on the joint seat 1, the center line of the first straight groove segment 311 is parallel to the center line of the second straight groove segment 321, and the center line of the straight groove segment is perpendicular to the line connecting the first axis X1 and the second axis X2. In this structural state, the force-bearing structure of the folding joint is in the form of right-angle support, achieving optimal support stability, effectively dispersing external pressure, avoiding component damage caused by concentrated driving force during folding and unfolding, and improving the service life of the folding joint.

[0034] To prevent structural damage caused by excessive unfolding of the support frame and the enclosure, and to ensure that they are in a stable working position after unfolding, in this embodiment, an angle limiting mechanism 4 is provided between the first support frame 2a and the second support frame 2b.

[0035] Angle limiting mechanism 4 is used to limit the unfolding angle of the first support 2a and the second support 2b, preventing them from rotating further after unfolding to their limit position, and forcing them to fold and rotate in the opposite direction. In this embodiment, the angle limiting mechanism 4 is set in the circular direction of the first axis X1, with a mating block and a mating groove respectively set at the upper end of the first support 2a and the second support 2b. When the first support 2a and the second support 2b are unfolded to their limit position, the mating block is locked at one end of the mating groove, preventing further unfolding. The structure is simple and the limiting effect is stable and not prone to failure. It should be noted that the angle limiting mechanism 4 can also be set between the first support 2a and the joint seat 1, or between the second support 2b and the joint seat 1, both of which can achieve the limiting function of unfolding to the limit position.

[0036] like Figure 1-6 As shown, the folding joint principle of this embodiment is as follows: When it needs to be folded, the first support 2a and the second support 2b are rotated relative to each other around the first axis X1 to fold together. At this time, the first pin D1 moves both slidingly and rotatingly in the first drive groove 31 from the first straight groove section 311 to the first clearance section 312, while moving downward in the first guide groove 11; the second pin D2 moves both slidingly and rotatingly in the second drive groove 32 from the second straight groove section 321 to the second clearance section 322, while moving downward in the second guide groove 12; through the cooperation of the pin and the drive groove, the first frame 3a and the second frame 3b are rotated relative to each other around the second axis X2 to fold together. Further downward force can be applied to the first frame 3a and the second frame 3b until the components fit together, completing the folding of the joint. After folding, the overall volume is greatly reduced.

[0037] When it needs to be unfolded, an external force is applied to drive the first support frame 2a and the second support frame 2b to rotate relative to each other around the first axis X1 and unfold. The pin slides in the straight groove section of the drive groove and drives the frame to unfold synchronously until the angle limiting mechanism 4 triggers the limit. The support frame and the frame are unfolded to the limit position. At this time, the folding joint is in a stable support state.

[0038] like Figure 1-6 As shown, two folding joints are symmetrically arranged on the left and right sides of the children's bed, and a headboard 5a is fixedly connected between the first frame 3a of the two folding joints, and a footboard 5b is fixedly connected between the second frame 3b of the two folding joints. The headboard 5a and the footboard 5b are made of tubular splicing or integral molding structure to form the enclosing frame of the children's bed, which plays a protective role for children.

[0039] A U-shaped front support 6a extending vertically downwards is fixed between the first support frame 2a of the two folding joints, and a U-shaped rear support 6b extending vertically downwards is fixed between the second support frame 2b of the two folding joints. The front support 6a and the rear support 6b serve as the support legs of the children's bed, providing stable vertical support for the bed frame. Anti-slip pads can be fitted on the bottom of the bed to improve the anti-slip properties and stability of the bed frame when placed on the ground.

[0040] like Figure 9 As shown, the children's bed also includes a front base frame 7a and a rear base frame 7b, which are joined together to form the supporting base of the children's bed. A bed board or mattress can be laid on top of it to provide a place for the child. Specifically, one end of the front base frame 7a is pivotally connected to the front support 6a via a third axis X3, allowing it to rotate relative to the front support 6a around the third axis X3, which is located approximately at the midpoint between the first support frame 2a and the front support 6a. One end of the rear base frame 7b is pivotally connected to the rear support 6b via a fourth axis X4, allowing it to rotate relative to the rear support 6b around the fourth axis X4, which is located approximately at the midpoint between the second support frame 2b and the rear support 6b. The other end of the front base frame 7a is pivotally connected to the other end of the rear base frame 7b via a fifth axis X5, allowing the front and rear base frames 7a and 7b to rotate and fold relative to each other around the fifth axis X5. This multi-axis pivotal design allows the base frames to be folded and unfolded simultaneously with the bed frame, eliminating the need for separate operation and simplifying the folding process of the children's bed.

[0041] To prevent the children's bed from accidentally closing due to external impact or squeezing after it is unfolded, and to improve safety, the children's bed is also equipped with an unfolding stabilizing mechanism 8. The unfolding stabilizing mechanism 8 is located at the pivot connection of the fifth axis X5 and serves as a limiting component after the bed is unfolded.

[0042] The unfolding stabilizing mechanism 8 includes an unlocking component, which can be a pull-up button, lever, or other structure, making it easy to operate and suitable for the use of children's beds. When the user pulls the unlocking component upwards, the limiting position of the unfolding stabilizing mechanism 8 is released, causing the front base frame 7a and the rear base frame 7b to fold upwards, which in turn causes the first support frame 2a and the second support frame 2b to fold together, thus realizing the folding of the children's bed.

[0043] The unfolding stabilizing mechanism 8 can simply be a flattening limiter. The structure can be referenced in patent authorization announcement number CN 114052436B, specifically the structure at the engagement point of the first folding joint 223 and the second folding joint 224.

[0044] When the front base plate 7a and the rear base plate 7b are flattened, the limiting mechanism prevents them from moving further downward. In this embodiment, in addition to flattening and limiting, a locking mechanism is added between the two. The locking mechanism includes an elastic locking tongue installed on the front base plate 7a and a locking rod installed on the rear base plate 7b. When the unfolding stabilizing mechanism is locked, the locking tongue rests against the lower part of the locking rod. The unlocking component is connected to the elastic locking tongue. When unlocking, the unlocking component is pulled, and the locking tongue retracts and disengages from the locking rod, that is, the unlocking component is further pulled up, and the fifth axis X5 is moved upward, driving the front base plate 7a and the rear base plate 7b to fold upward around the fifth axis X5.

[0045] In this embodiment, the first frame 3a and the second frame 3b on the left and right sides are located between the first support frame 2a and the second support frame 2b on the left and right sides, so that in the unfolded position, the first support frame 2a and the second support frame 2b form an exposed A-shaped support shape, which is more beautiful and simple in appearance.

[0046] The principle behind the overall unfolding of a children's bed is as follows: Unfolding Operation: Place the folded children's bed on a flat surface, pull the headboard 5a and footboard 5b to both sides, driving the supports and side frames of the folding joints on both sides to unfold synchronously until the angle limiting mechanism 4 of the folding joints is triggered; at the same time, the front bottom board 7a and rear bottom board 7b unfold horizontally around the fifth axis X5 under the drive of the bracket, and the unfolding stabilizing mechanism 8 automatically resets to form a limit, locking the bottom board frame, completing the unfolding of the children's bed, at which point the bed is in a stable use state.

[0047] Folding Operation: Pull up the unlocking piece of the unfolding stabilizing mechanism 8 to release the limit of the base frame. Then lift the middle position of the children's bed upwards, driving the front base frame 7a and the rear base frame 7b to fold upwards around the fifth axis X5. The folding movement of the base frame causes the front support 6a and the rear support 6b to retract inwards, which in turn causes the support frame and the surrounding frame of the folding joint to retract in opposite directions simultaneously, until the headboard frame 5a and the footboard frame 5b retract downwards in opposite directions. The base frame is folded to the inside of the front and rear supports, completing the overall folding of the children's bed. After folding, the bed volume is greatly reduced, making it easy to carry and store.

[0048] The children's bed in this embodiment achieves synchronous unfolding and folding of the bed frame and base frame through the linkage design of the folding joints on both sides. The operation steps are simple and do not require separate disassembly or adjustment of parts. The unfolding stabilizing mechanism 8 and the angle limiting mechanism 4 of the folding joint form a double limit, which greatly improves the structural stability and safety of the bed after unfolding and effectively avoids accidental folding. At the same time, the symmetrical design of each component and the selection of high-strength materials ensure the load-bearing capacity and service life of the children's bed. When folded, it has a small volume and high space utilization, making it suitable for various scenarios such as family use and outdoor carrying.

[0049] Example 2: Figure 10-11As shown, this embodiment differs from Embodiment 1 in two aspects; the remaining structure, folding principle, and folding method are the same as in Embodiment 1. The specific differences are as follows: The front base plate 7a and the rear base plate 7b are positioned differently relative to the front support and the rear support, respectively: In this embodiment, the front base plate 7a and the rear base plate 7b are rotatably set between the lower part of the front support and the lower part of the rear support. The base plate is deeper and more suitable for use as a game enclosure.

[0050] The plastic shell on the joint seat 1 is omitted. The first support 2a, the second support 2b, the first frame 3a and the second frame 3b are all directly connected to the metal reinforcing plate 13 by pivot. While simplifying the structure, the pivot stability and linkage effect are still guaranteed.

[0051] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A folding joint, characterized in that: It includes a joint seat (1), a first support (2a) and a second support (2b) whose upper ends are respectively pivotally connected to the upper part of the joint seat (1), and a first enclosure (3a) and a second enclosure (3b) whose one end is respectively pivotally connected to the lower part of the joint seat (1). The first enclosure (3a) has a first drive groove (31), and the second enclosure (3b) has a second drive groove (32). The first support (2a) has a first pin (D1) inserted into the first drive groove (31), and the second support (2b) has a second pin (D2) inserted into the second drive groove (32). When the first support (2a) and the second support (2b) are closed or unfolded relative to each other based on the joint seat (1), the first pin (D1) is configured to both rotate and slide in the first drive groove (31), and the second pin (D2) is configured to both rotate and slide in the second drive groove (32), thereby causing the first frame (3a) and the second frame (3b) to close or unfold relative to each other based on the joint seat (1).

2. The folding joint according to claim 1, characterized in that: The first drive groove (31) includes a first straight groove section (311) and a first clearance section (312). The center line of the first straight groove section (311) is tangent to a circle with the rotation axis of the first enclosure (3a) as the center. The second drive groove (32) includes a second straight groove section (321) and a second clearance section (322). The center line of the second straight groove section (321) is tangent to a circle with the rotation axis of the second enclosure (3b) as the center. When the first support (2a) and the second support (2b) are retracted relative to each other based on the joint seat (1), the first pin (D1) moves from the first straight groove section (311) to the first clearance section (312), and the second pin (D2) moves from the second straight groove section (321) to the second clearance section (322).

3. The folding joint according to claim 2, characterized in that: The joint seat (1) has a first guide groove (11) and a second guide groove (12) on both sides. The center line of the first guide groove (11) is consistent with or parallel to the circumference line with the rotation axis of the first support (2a) as the center. The center line of the second guide groove (12) is consistent with or parallel to the circumference line with the rotation axis of the second support (2b) as the center. The first pin (D1) is inserted in the first guide groove (11) and the second pin (D2) is inserted in the second guide groove (12).

4. The folding joint according to claim 2, characterized in that: The upper end of the first support (2a) and the upper end of the second support (2b) are coaxially pivoted with the upper part of the joint seat (1) via a first shaft (X1); one end of the first frame (3a) and one end of the second frame (3b) are coaxially pivoted with the lower part of the joint seat (1) via a second shaft (X2).

5. The folding joint according to claim 4, characterized in that: When the first support (2a) and the second support (2b) are deployed relative to each other based on the joint seat (1), the center line of the first straight groove segment (311) is parallel to or coincides with the center line of the second straight groove segment (321), and is perpendicular to the line connecting the first axis (X1) and the second axis (X2).

6. The folding joint according to claim 1, characterized in that: The first support frame (2a) and the second support frame (2b), and the first enclosure frame (3a) and the second enclosure frame (3b) are respectively symmetrically arranged on both sides of the joint seat (1).

7. The folding joint according to claim 1, characterized in that: An angle limiting mechanism (4) is provided between the first support (2a) and the second support (2b), or between the first support (2a), the second support (2b) and the joint seat (1) respectively, to limit the extension to the limit position.

8. The folding joint according to claim 1, characterized in that: The joint seat (1) includes a metal reinforcing plate (13). The upper ends of the first support (2a) and the second support (2b) are respectively pivotally connected to the upper part of the reinforcing plate (13). One end of the first frame (3a) and one end of the second frame (3b) are respectively pivotally connected to the lower part of the reinforcing plate (13).

9. A children's bed comprising the folding joint described in any one of claims 1-8, characterized in that: The folding joint has two parts, which are located on the left and right sides of the child bed respectively. A headboard (5a) is fixed between the two first frames (3a), and a footboard (5b) is fixed between the two second frames (3b). A downwardly extending front support (6a) is fixed on the two first supports (2a), and a downwardly extending rear support (6b) is fixed on the two second supports (2b). The child bed also includes a front base plate (7a) pivoted to the front support (6a) via a third axis (X3), and a rear base plate (7b) pivoted to the rear support (6b) via a fourth axis (X4). The front base plate (7a) and the rear base plate (7b) are connected via a fifth axis (X5). The child bed also includes an unfolding stabilizing mechanism (8).

10. The children's bed according to claim 9, characterized in that: The unfolding stabilizing mechanism (8) is located at the pivot connection of the fifth axis (X5) and includes an unlocking component. When the user pulls the unlocking component upward, the front bottom plate frame (7a) and the rear bottom plate frame (7b) fold upward, causing the first support frame (2a) and the second support frame (2b) to close relative to each other.

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