Children's playpen

Abstract

A children's play bed includes a side frame, an upright frame, and a lower frame. The lower frame includes a central seat and multiple bottom support rods positioned between the central seat and the lower ends of the corresponding upright frames. The outer ends of the bottom support rods are connected to the corresponding upright frames via a bottom second axis pivot. The lower frame also includes multiple non-extensible flexible ropes extending outward from the central seat. The outer ends of the flexible ropes are connected to the lower ends of the corresponding upright frames, with this connection point located below the bottom second axis. When the central seat is pressed down, causing the lower frame to unfold to its limit position, the flexible ropes become taut. Under the combined action of the bottom support rods and the flexible ropes, the upper ends of the upright frames are pulled outward, expanding and creating tension on the side frames, thus unfolding and locking the children's play bed. When folded, the central seat moves upward, and the flexible ropes become taut, causing the upright frames to move towards the center. The flexible ropes do not interfere with the corresponding upright frames, bottom support rods, or central seat. The lower frame has a smaller volume after folding, a simpler structure, and lower manufacturing costs.

Description

Technical Field

[0001] This invention belongs to the field of children's bed technology, and specifically relates to a children's play bed. Background Technology

[0002] Existing children's playpens that can be unfolded and folded vary in type depending on the folding mechanism. They typically include multiple side frames, multiple uprights, and a foldable lower frame connected to the lower ends of the uprights. Each side frame is rotatably connected between the upper ends of two adjacent uprights. The structure of the lower frame also varies greatly. For example, patent application publication number CN 210144293 U discloses a children's playpen frame where the lower frame includes a central seat and multiple sets of bottom connecting rods connecting the central seat and corresponding lower frame corner joints. The central seat includes an upper center group and a lower center group capable of vertical displacement. Each bottom connecting rod group, the upper center group, and the lower center group form a deformable triangular mechanism, and together with the uprights, they form a deformable four-bar linkage. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a children's play bed.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a children's play bed, having an unfolded position and a folded position, including multiple sets of foldable side frames, multiple upright frames, and a foldable lower frame connected between the lower ends of the multiple upright frames. Each set of side frames is connected between the upper ends of two adjacent upright frames. The lower frame includes a central seat located in the middle of the bottom, and multiple bottom support rods with their ends rotatably disposed between the central seat and the lower ends of the corresponding upright frames. The outer ends of the bottom support rods are connected to the corresponding upright frames via bottom pivots. The lower frame also includes multiple rods extending outward from the central seat. The flexible ropes are non-stretchable, with their outer ends connected to the lower ends of the corresponding uprights. This connection is located below the bottom axis. The center seat moves downward, causing each upright to move away from the center seat. The center seat moves upward, causing each upright to retract relative to the center seat. When each upright is moved away from the center seat to its limit position, the children's play bed is in the unfolded position. Each flexible rope is stretched between the lower end of the corresponding upright and the center seat, causing the upper end of the corresponding upright to tend to expand outward. When the center seat is moved downwards to its limit position, the flexible ropes become taut, which pulls on the lower end of the corresponding uprights, causing the upper end of the uprights to expand outwards and creating tension on the side frames. At this point, the children's play bed is in the unfolded position. Moving the center seat upwards causes the lower part of the uprights to slightly deviate towards the center seat and tilt towards the center. At this point, the flexible ropes are no longer taut and will not interfere with the corresponding uprights, bottom support rods, or center seat. As the center seat moves further upwards, the uprights and bottom support rods can be brought closer together, resulting in a smaller volume when the lower frame is folded.

[0005] In some embodiments, the inner end of the bottom support rod is connected to the center seat via a bottom pivot.

[0006] In some embodiments, the inner end of the flexible rope is connected to the central seat, and this connection is located below the bottom axis.

[0007] In some embodiments, when the children's playbed is in the unfolded position, each of the flexible ropes is parallel to the corresponding bottom support rod.

[0008] In some embodiments, the inner end of the flexible rope is connected to the center seat, and / or the outer end of the flexible rope is connected to the corresponding upright via a tension adjustment mechanism.

[0009] In some embodiments, the tension adjustment mechanism includes a movable block that slides up and down at the bottom of the central seat, a bolt threaded to the bottom of the central seat, the upper end of the bolt being movably connected to the movable block, and the inner end of the flexible rope being fixed to the movable block.

[0010] In some embodiments, a base frame locking mechanism is provided between the inner end of the bottom support rod and the center seat.

[0011] In some embodiments, each set of side frames includes two sets of railings and an intermediate member rotatably disposed between the two sets of railings. A side lock is provided between the intermediate member and the railings on both sides, which can be locked or unlocked by controlling the distance and / or angle between the two side frames. The stable standing state of the two adjacent frames results in a relatively distant tension between the two sets of railings, so that the side lock is stably in the locked position.

[0012] 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.

[0013] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: When the central seat of the present invention is pressed down, the lower frame is unfolded to its limit position, the flexible rope is tightened, and under the combined action of the bottom support rod and the flexible rope, the upper end of the upright is pulled outward and expanded, generating tension on the side frame, so that the children's play bed unfolds and locks; when folding, after the central seat moves upward, the flexible rope is no longer tightened, and the upright is brought closer to the center by the cooperation of the central seat and the bottom support rod. The flexible rope will not interfere with the corresponding upright, bottom support rod and central seat. The lower frame is smaller in volume after folding, the structure is simple, and the manufacturing cost is lower. Attached Figure Description

[0014] Appendix Figure 1 A 3D diagram of the play bed in its unfolded position;

[0015] Appendix Figure 2 A 3D diagram of the play bed in the folding process;

[0016] Appendix Figure 3 A 3D diagram of the play bed in its folded position;

[0017] Appendix Figure 4 A top view of the play bed in its unfolded position;

[0018] Appendix Figure 5 For the appendix Figure 4 AA cross-section view;

[0019] Appendix Figure 6 This is a schematic diagram of the side panel lock in the deployed and locked position.

[0020] Appendix Figure 7This is a structural diagram showing the side lock in the unlocked state.

[0021] Appendix Figure 8 This is a structural diagram showing the side panel lock folding process;

[0022] Appendix Figure 9 This is a schematic diagram of the side panel lock folding position structure;

[0023] The components include: 1. Side frame; 11. Upper frame rod; 12. Lower frame rod; 13. Intermediate component; 14. Side lock; 14a. Locking pin; 14b. Unfolding slot; 14c. Folding slot; 14d. Folding positioning slot; 14e. Locking spring; 14f. Unlocking spring; 2. Upright frame; 21. Upper corner; 22. Upright rod; 23. Lower support leg; 3. Lower frame; 31. Center seat; 32. Bottom support rod; 33. Flexible rope; X11. Upper first axis; X12. Upper second axis; X13. Upper third axis; X14. Upper fourth axis; X21. Bottom first axis; X22. Bottom second axis. Detailed Implementation

[0024] Playpen, as attached Figure 1-3 As shown, the structure includes four uprights 2, each with an upper corner 21, a vertical pole 22, and a lower support leg 23; four foldable side frames 1 connected between adjacent upper corners 21; and a foldable lower frame 3 connected between the four lower support legs 23. A side frame lock 14 is provided in the middle of the side frame 1, which can be locked or unlocked by controlling the distance between the two uprights and / or the tilt angle of the uprights.

[0025] In actual use, a bed sheet cover is required; this is omitted from the diagram. Detailed instructions follow.

[0026] The lower frame 3 includes a central seat 31 located in the middle of the bottom and four bottom support rods 32 with their ends rotatably disposed between the central seat 31 and the lower end of the corresponding upright 2. The outer ends of the bottom support rods 32 are connected to the lower support feet 23 of the corresponding upright 2 via a bottom second axis X22 pivot, and the inner ends of the bottom support rods 32 are connected to the central seat 31 via a bottom first axis X21 pivot.

[0027] The lower frame 3 also includes four non-extensible flexible ropes 33 extending outward from the center seat 31. The outer ends of the flexible ropes 33 are rotatably connected to the corresponding lower support legs 23, and this connection is located below the bottom second shaft X22. The four flexible ropes 33 extending outward from the center seat 31 can be two flexible ropes that cross in the middle and are fixed to the center seat 31 at the crossing point, or they can be four independent flexible ropes fixed to the center seat 31.

[0028] In this embodiment, the inner ends of the four flexible ropes 33 are directly rotatably connected to the central seat 31, and this connection is located below the bottom axis X21.

[0029] Without illustration, the flexible rope 33 can also be installed using a tension adjustment mechanism. The tension adjustment mechanism includes a movable block installed at the bottom of the center seat 31 that can be adjusted up and down by bolts, etc. The ends of the four flexible ropes are fixed on the movable block and extend outward from the center seat. By adjusting the bolts, the up and down position of the movable block can be adjusted, thereby lengthening or shortening the length of the flexible rope 33.

[0030] When the lower frame is unfolded, the center seat 31 moves downwards to its lowest position. When each upright 2 is at its extreme position relative to the center seat 31, the children's play bed is in the unfolded position, as shown in the attached diagram. Figure 1 , 4 As shown in Figure 5, each flexible rope 33 is stretched between the lower end of the corresponding upright 2 and the center seat 31. Under the combined action of the center seat, the bottom support rod and the flexible rope, the upper end of the upright is pulled outward and expanded, generating tension on the side frame. In this state, each flexible rope 33 is parallel to the corresponding bottom support rod 32.

[0031] Each side frame 1 includes two sets of railings and a middle piece 13 rotatably disposed between the two sets of railings. Side locks 14 are symmetrically disposed between the two side railings and the middle piece 13. The stable standing state of the two adjacent uprights 2 creates a relatively distant tension between the two sets of railings, which keeps the side locks 14 stably in the locked position, thus keeping the play bed stably in the unfolded position and locked.

[0032] In this embodiment, as shown in the appendix Figure 1 , 2 As shown, each set of rails includes an upper rail 11 and a lower rail 12, arranged parallel to each other at the bottom when the play bed is unfolded. The two ends of the upper rail 11 are pivotally connected to the corresponding intermediate piece 13 and the upright piece 2 via the upper axis X11 and the upper second axis X12. One end of the lower rail 12 can rotate around the upper third axis X13 and slide on the intermediate piece 13, while the other end of the lower rail 12 is pivotally connected to the upright piece 2 around the upper fourth axis X14.

[0033] As attached Figure 6-9As shown, each lower band 12 has a guide groove at one end along its length, and the upper triaxial rod X13 passes through the guide groove and is fixed to the corresponding side of the intermediate member 13. Side locks 14 are symmetrically arranged between the two lower bands 12 and the intermediate member 13. The side lock 14 includes an unfolding groove 14b radially formed on the intermediate member 13 along the upper triaxial rod X13, a folding groove 14c circumferentially formed on the intermediate member 13 along the upper triaxial rod X13, and a locking pin 14a slidably disposed on the lower band 12 along its length. A locking spring 14e is provided between the locking pin 14a and the lower band 12, causing the locking pin 14a to tend to move towards the corresponding upper triaxial rod X13. The folding groove 14c extends downward from the radially outer end of the unfolding groove 14b to form an arc-shaped groove, while the unfolding groove 14b is a straight groove.

[0034] The lines connecting the upper axis X11 and the upper third axis X13 on both sides of the intermediate component 13 are arranged in a figure-eight pattern. The connecting rods between the upper second axis X12 and the upper fourth axis X14 of the two adjacent uprights 2 are also arranged in a figure-eight pattern.

[0035] The playbed needs to be folded: see attached. Figure 1 , 6 As shown, the side lock 14 is in the locked state, with the locking pin 14a inserted into the unfolding slot 14b, the length of which extends along the length of the lower frame 12. When the center seat 31 is lifted upwards, each upright 2 first retracts towards the center from the lower support 23, forming a trumpet-shaped contraction with a smaller bottom and a larger top. Each upright 2 tilts, and the distance between adjacent uprights is larger at the top and smaller at the bottom. The locking pin 14a then easily exits the straight unfolding slot 14b and enters the folding slot 14c, as shown in the attached diagram. Figure 7 The unlocked state is shown. As the center seat 31 moves further upward, and the intermediate component 13 moves downward due to gravity, and the adjacent uprights 2 gradually move closer together, as shown in the attached diagram... Figure 2 , 8 As shown, the locking pin 14a slides downward along the folding groove 14c, and when it slides to the attached... Figure 9 As shown in the attached image, the entire play bed is folded up. Figure 3 As shown, the playbed is in the folded position. (See attached image) Figure 8 , 9 As shown, the lower part of the folding groove 14c has a radially recessed folding positioning groove 14d. At the folding position, the locking pin 14a presses downwards into the folding positioning groove 14d, serving a folding positioning function.

[0036] Each lower support rod 12 is provided with an unlocking spring 14f between it and the upper three axes X13. During the process of the play bed unfolding and folding, the lower support rod 12 is slid, so that the locking pin 14a can be more easily disengaged from the unfolding slot 14b.

[0037] The play bed needs to be unfolded: (No illustration shown) Press the center seat 31 down, and each upright 2 will move away from the center starting from the lower support leg 23. All upright 2 will unfold together, causing the side frame 1 to unfold. The two upper frame rods 11 will rotate around the upper axis X11 relative to the middle part 13 and be pulled out. At the same time, the lower frame rod 12 will rotate around the upper three axes X13 relative to the middle part 13 and be pulled out. Under the cooperation of the upper three axes X13 and the guide groove, they will slide relative to each other and be pulled up. At this time, the locking spring 14e acting on the locking pin 14a is in a compressed state. When the center seat 31 is pressed down to the bottom, the flexible rope is tightened. Each upright 2 will remain standing under the tension of the corresponding flexible rope, that is, it cannot move and tilt towards the center. The side frame 1 will be fully unfolded. At this moment, when the locking pin 14a is directly facing the unfolding groove 14b, the side lock will easily enter the locking state under the action of the locking spring 14e.

[0038] The playbed mechanism is simple in principle and easy to operate. It can be folded with a simple lift and unfolded with a simple stretch. The locking and unlocking processes are smooth during unfolding and folding. It is stable in the unfolded position, making it safe and reliable to use. When folded, it is smaller in size, lighter in weight, and lower in cost.

[0039] Without illustration, each set of side frames 1 can also adopt other structures, such as the upper frame of the game enclosure with patent publication number CN 210095251 U.

[0040] A base frame locking mechanism is provided between the inner end of the bottom support rod 32 and the center seat 31. The base frame locking mechanism is not an invention point. Any mechanism that can lock the bottom support rod 32 and the center seat 31 relative to each other in the unfolded position is applicable, such as the structure of the chassis seat in patent publication number CN 2794343Y.

[0041] 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 children's play bed, having an unfolded position and a folded position, comprising multiple sets of foldable side frames (1), multiple uprights (2), and a foldable lower frame (3) connected between the lower ends of the multiple uprights (2), each set of side frames (1) being connected between the upper ends of two adjacent uprights (2), the lower frame (3) comprising a central seat (31) located in the middle of the bottom, and multiple bottom support rods (32) with their ends rotatably disposed between the central seat (31) and the lower ends of the corresponding uprights (2), the outer ends of the bottom support rods (32) being pivotally connected to the corresponding uprights (2) via a bottom second axis (X22), characterized in that: The inner end of the bottom support rod (32) is pivotally connected to the center seat (31) via a bottom shaft (X21). The lower frame (3) also includes multiple non-stretchable flexible ropes (33) extending outward from the central seat (31). The inner ends of the flexible ropes (33) are connected to the central seat (31) at a point below the first bottom axis (X21), and the outer ends of the flexible ropes (33) are connected to the lower ends of the corresponding uprights (2) at a point below the second bottom axis (X22). When each of the uprights (2) is moved away from the center seat (31) to its limit position, the children's play bed is in the unfolded position. Each of the flexible ropes (33) is stretched between the lower end of the corresponding upright (2) and the center seat (31). Each of the flexible ropes (33) is parallel to the corresponding bottom support rod (32). Under the combined action of the bottom support rod (32) and the flexible ropes (33), the upper end of the corresponding upright (2) tends to expand outward, pulling the upper end of the upright (2) outward and generating tension on the side frame (1). When the children's play bed is switched to the folded position, the center seat (31) is moved upward, the flexible rope (33) is no longer taut, the upright (2) moves closer to the center, and the flexible rope (33) does not interfere with the upright (2), the bottom support rod (32) and the center seat (31).

2. The children's playbed according to claim 1, characterized in that: The inner end of the flexible rope (33) is connected to the center seat (31), and / or the outer end of the flexible rope (33) is connected to the corresponding upright (2) through a tension adjustment mechanism.

3. The children's playbed according to claim 2, characterized in that: The tension adjustment mechanism includes a movable block that slides up and down at the bottom of the center seat (31), a bolt threaded to the bottom of the center seat (31), the upper end of the bolt being movably connected to the movable block, and the inner end of the flexible rope (33) being fixed to the movable block.

4. The children's playbed according to claim 1, characterized in that: A base frame locking mechanism is provided between the inner end of the bottom support rod (32) and the center seat (31).

5. The children's playbed according to claim 1, characterized in that: Each set of side frames (1) includes two sets of railings and an intermediate piece (13) rotatably disposed between the two sets of railings. The intermediate piece (13) and the railings on both sides are provided with a side frame lock (14) that can be locked or unlocked by controlling the distance and / or angle between the two side frames.

Images