Bed frames and play beds

Abstract

This application discloses a bed frame and a playpen. The bed frame includes a bottom frame, a top frame, uprights, and a seat cover. The bottom frame includes a front seat tube and a rear seat tube; the top frame includes a long armrest tube and a short armrest tube; the uprights are positioned between the bottom and top frames to enclose the interior space of the bed; the seat cover is fitted into the interior space and has a seat cover crossbar positioned opposite to the front and rear seat tubes. The seat cover crossbar is connected to the rear seat tube by a tension spring; wherein the extension direction of the tension spring is orthogonal to the length direction of the seat cover crossbar, and the long armrest tube can be selectively slidably engaged with the uprights on the front seat tube to allow the seat cover and the long armrest tube to move synchronously. Therefore, by setting the extension direction of the tension spring to be orthogonal to the length direction of the seat cover crossbar, the tension spring can directly pull the seat cover crossbar, making the tension force of the tension spring more uniform and stable, and improving the stability and smoothness of the long armrest tube's descent.

Description

Technical Field

[0001] This application relates to the field of play bed technology, and in particular to a bed frame and a play bed. Background Technology

[0002] With the continuous improvement of people's living standards, children's play beds have become common in daily life.

[0003] Currently, the armrests of play beds on the market are height-adjustable. They can be lowered by pulling with a tension spring. The tension spring is located in the middle of the back seat tube. It can lower the armrest by pulling at an angle. This method is relatively simple. However, because the tension spring pulls at an angle, the force on the armrest is uneven. The stability and smoothness of the armrest are poor during the descent, resulting in a poor user experience. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide a bed frame in which the extension direction of the tension spring is orthogonal to the length direction of the seat fabric crossbar, thereby improving the stability of the tension spring force and enabling the long armrest tube to descend stably.

[0005] This application further proposes a play bed using the above-described bed frame.

[0006] According to an embodiment of this application, a bed frame includes a bottom frame, a top frame, uprights, and a seat cover. The bottom frame includes a front seat tube and a rear seat tube. The top frame includes a long armrest tube and a short armrest tube. The uprights are disposed between the bottom frame and the top frame to enclose an interior space of the bed through the top frame, the bottom frame, and the uprights. The seat cover is fitted into the interior space of the bed, and the seat cover is provided with a seat cover crossbar disposed opposite to the front seat tube and the rear seat tube. The seat cover crossbar is connected to the rear seat tube by a tension spring. The extension direction of the tension spring is orthogonal to the length direction of the seat cover crossbar. The long armrest tube is selectively slidably engaged with the uprights disposed on the front seat tube to allow the seat cover and the long armrest tube to move synchronously.

[0007] According to the bed frame of this application embodiment, by setting a seat fabric crossbar on the seat fabric and setting a tension spring between the seat fabric crossbar and the rear seat tube, the tension spring can pull the long armrest tube and the seat fabric surrounding the long armrest tube, so that the two move downward synchronously to adjust the height of the long armrest tube, or adjust the height of the long armrest tube first, and then pull the seat fabric crossbar through the tension spring to drive the seat fabric surrounding the long armrest tube to descend; by setting the extension direction of the tension spring to be orthogonal to the length direction of the seat fabric crossbar, the tension spring can be perpendicularly connected to the rear seat tube and the seat fabric crossbar, so that the tension spring can pull the seat fabric crossbar directly. With this setting, the tension of the tension spring is more uniform and stable, which can improve the stability and smoothness of the descent of the long armrest tube.

[0008] In some embodiments, there are two tension springs, spaced apart, with one end of each spring attached to the seat fabric crossbar. This arrangement simplifies the connection between the tension springs and the seat fabric crossbar, and ensures that the force is evenly distributed across both ends of the crossbar when the tension springs pull it, thus improving stability during operation.

[0009] Specifically, the distance between the mounting point of the tension spring on the fabric crossbar and the adjacent end of the fabric crossbar is D1, and the length of the fabric crossbar is L1, satisfying 0.05≤D1 / L1≤0.15. Setting D1 / L1 within this range ensures that the tension spring can stably pull the fabric crossbar, improving the smoothness of pulling; if D1 / L1 is greater than or less than this range, the fabric crossbar will be subjected to uneven force when the tension spring pulls it, resulting in poor pulling stability.

[0010] Furthermore, the rear seat tube includes a straight rod portion and extension tube portions located at both ends of the straight rod portion and connected to the front seat tube. The straight rod portion is disposed opposite to the seat fabric crossbar, and a fixing hole is provided on the straight rod portion, with the other end of the tension spring passing through the fixing hole. This configuration simplifies the connection between the tension spring and the straight rod portion, and enhances the stability of their connection.

[0011] In some embodiments, the line connecting the mounting point of the tension spring on the seat fabric crossbar and the fixing hole is orthogonal to the extending direction of the straight rod portion, so that the extending direction of the tension spring is orthogonal to the length direction of the seat fabric crossbar. This creates a straight pull, making the force direction of the straight rod portion and the seat fabric crossbar the same, which improves the smoothness of pulling and makes the descent of the long handrail tube more stable.

[0012] Specifically, the distance between the fixing hole and the end of the adjacent straight rod is D2, and the length of the straight rod is L2, satisfying 0.1≤D2 / L2≤0.2. Setting D2 / L2 within this range ensures that the fixed positions at both ends of the tension spring are in a straight line, even if the tension spring is perpendicular to the straight rod and the seat cloth crossbar respectively. This makes the tension of the tension spring more uniform and stable, which can better pull the seat cloth crossbar and improve the stability and smoothness of the long handrail tube descent.

[0013] The play bed according to an embodiment of this application includes: a bed frame and a support frame as described in any of the above embodiments. The support frame includes: bottom support legs and support columns. The top of the support columns is connected to the bottom frame of the bed frame via a rocker arm. This design simplifies the structure of the play bed, allows the bed frame to rock back and forth, adding to the fun, and the support frame supports the bed frame, improving the overall stability of the play bed.

[0014] In some embodiments, there are two support frames, located on the side of the short armrest tube of the bed frame, and the two support columns are connected by a connecting horizontal tube. Positioning the support frames on the side of the short armrest tube allows the bed frame to sway in the front-to-back direction. The connecting horizontal tube connects the two support columns, improving the stability of the support frames and thus enhancing the overall stability of the play bed.

[0015] Specifically, the connecting horizontal tube includes a horizontal bar portion and insertion pipe portions located at both ends of the horizontal bar portion. The insertion pipe portions are inserted into the support column with an insertion length of 75mm-85mm. This ensures that the fitting length between the insertion pipe portion and the fixed pipe is sufficient, allowing the insertion pipe portion to fit better within the fixed pipe, improving the stability of the connection between the two, thereby enhancing the stability of the support frame and preventing it from swaying.

[0016] Furthermore, the support column includes an upper column and a lower column that are plugged together to achieve length adjustment. An upper plunger is provided between the upper column and the lower column, and the plug-in tube is inserted into the upper plunger. This configuration allows for height adjustment of the play bed, and the upper plunger limits the movement of the plug-in tube, thereby improving the stability of the support frame and ultimately enhancing the stability of the play bed.

[0017] In some embodiments, the insertion pipe portion includes: a first arc-shaped pipe segment and a second arc-shaped pipe segment with different diameters and connected to each other. The first arc-shaped pipe segment is provided with a clearance opening, and the upper plunger is provided with a limiting piece that mates with the clearance opening. By configuring the insertion pipe portion as two arc-shaped pipe segments with different diameters, rotation relative to the fixed pipe can be prevented when it mates with the fixed pipe. The clearance opening on the first arc-shaped pipe segment allows it to mate with the limiting piece of the upper plunger, thereby enabling the upper plunger to circumferentially limit the connection of the horizontal pipe, improving the stability of the support frame and preventing swaying of the support frame.

[0018] Specifically, a transition tube is provided between the crossbar and the insertion tube. The transition tube is flattened and extends in an arc shape. This prevents deformation of the connecting crossbar during punching and allows for better positioning. The arc-shaped transition tube also enhances safety during use.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of the play bed according to an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the tension spring according to an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the rear seat tube according to an embodiment of this application;

[0024] Figure 4 This is a structural schematic diagram of the support frame according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the connecting horizontal tube according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the structure of the insertion pipe according to an embodiment of this application;

[0027] Figure 7 This is a schematic diagram of the structure of the fixed tube according to an embodiment of this application;

[0028] Figure 8 This is a schematic diagram of the upper plunger according to an embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the structure of the crossbar of the seat cloth according to an embodiment of this application.

[0030] Figure label:

[0031] 1000 playbeds

[0032] Bed frame 100,

[0033] Base frame 10, front seat tube 11, rear seat tube 12, straight rod section 121, fixing hole 1211, extension tube section 122.

[0034] Top frame 20, long armrest tube 21, short armrest tube 22.

[0035] Column 30,

[0036] The crossbar for the seat is 40mm, and the mounting point is 41.

[0037] Tension spring 50,

[0038] Support frame 200,

[0039] Bottom support foot 210,

[0040] Support column 220,

[0041] Upper column 221, lower column 222,

[0042] Upper plunger 223, limiting plate 2231, fixing tube 224, clearance groove 2241

[0043] Connect horizontal tube 230,

[0044] Crossbar section 231,

[0045] Connector section 232, first arc-shaped pipe section 2321, clearance port 23211, second arc-shaped pipe section 2322.

[0046] Transition pipe section 233,

[0047] Joystick 240. Detailed Implementation

[0048] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0049] The following is for reference. Figures 1-9 The bed frame 100 and play bed 1000 according to embodiments of this application are described.

[0050] like Figure 1 As shown, the bed frame 100 according to an embodiment of this application includes: a bottom frame 10, a top frame 20, uprights 30, and a seat fabric.

[0051] The bottom frame 10 includes a front seat tube 11 and a rear seat tube 12; the top frame 20 includes a long armrest tube 21 and a short armrest tube 22; the uprights 30 are disposed between the bottom frame 10 and the top frame 20 to enclose the bed space through the top frame 20, the bottom frame 10 and the uprights 30; the seat cover is fitted into the bed space, and the seat cover is provided with a seat cover crossbar 40 disposed opposite to the front seat tube 11 and the rear seat tube 12, and the seat cover crossbar 40 is connected to the rear seat tube 12 by a tension spring 50; wherein the extension direction of the tension spring 50 is orthogonal to the length direction of the seat cover crossbar 40, and the long armrest tube 21 and the uprights 30 disposed on the front seat tube 11 can be selectively slidably engaged so that the seat cover and the long armrest tube 21 move synchronously.

[0052] Specifically, the front seat tube 11 and the rear seat tube 12 are arranged opposite to each other and connected to form the bottom frame 10. The long armrest tube 21 and the short armrest tube 22 are arranged above the bottom frame 10. The two ends of the long armrest tube 21 are connected to a short armrest tube 22 respectively, and the long armrest tube 21 and the short armrest tube 22 are arranged perpendicularly to form a rectangular top frame 20. The upright 30 is arranged vertically between the bottom frame 10 and the top frame 20. It is perpendicular to the bottom frame 10 and the top frame 20. Its upper end is connected to the junction of the long armrest tube 21 and the short armrest tube 22, and its lower end extends vertically downward to connect with the front seat tube 11 and the rear seat tube 12 respectively. In this way, the top frame 20, the bottom frame 10 and the upright 30 enclose a rectangular bed interior space.

[0053] It should be noted that the seat cover is fitted inside the bed space. The seat cover is not shown in the figure. A seat cover crossbar 40 is provided on the seat cover, which is located between the front seat tube 11 and the rear seat tube 12, and is positioned opposite to the front seat tube 11 and the rear seat tube 12. A tension spring 50 is provided inside the bed space. One end of the tension spring 50 is connected to the rear seat tube 12, and the other end is connected to the seat cover crossbar 40. The extension direction of the tension spring 50 is orthogonal to the length direction of the seat cover crossbar 40, and it is perpendicularly connected to the rear seat tube 12 and the seat cover crossbar 40.

[0054] Additionally, the long handrail tube 21 located above the front seat tube 11 can be selectively slidably engaged with the uprights 30 connected to its two ends. The two ends of the long handrail tube 21 can be locked or unlocked with the uprights 30. The long handrail tube 21 is equipped with a release mechanism, which can be controlled to adjust the locking or unlocking state of the long handrail tube 21. When it is necessary to adjust the height of the long handrail tube 21, the release mechanism is controlled to put the long handrail tube 21 in the unlocked state, and the long handrail tube 21 can slide up and down along the uprights 30. When it is not necessary to adjust the height of the long handrail tube 21, the release mechanism is controlled to put the long handrail tube 21 in the locked state, and the long handrail tube 21 is relatively fixed to the uprights 30 and cannot slide up and down along the uprights 30.

[0055] The tension spring 50 can pull the seat cloth crossbar 40. When both ends of the long handrail tube 21 are in the unlocked state, the tension spring 50 can pull the seat cloth crossbar 40 to drive the long handrail tube 21 and the seat cloth surrounding the long handrail tube 21 to descend synchronously.

[0056] The adjustment process of the long armrest tube 21 can be as follows: after the user switches the long armrest tube 21 to the unlocked state, the tension spring 50 pulls the long armrest tube 21 and the seat cloth to descend synchronously, thereby tensioning the seat cloth; the adjustment process of the long armrest tube 21 can also be as follows: after the user switches the long armrest tube 21 to the unlocked state, without releasing the unlocking device, the user adjusts the long armrest tube 21 to the desired position and then releases the unlocking device. At this time, the long armrest tube 21 slides up and down along the column 30 to a certain height. During the height adjustment process, the tension spring 50 pulls the seat cloth. When the long armrest tube 21 switches back to the locked state, the long armrest tube 21 and the column 30 are relatively fixed. The tension spring 50 simultaneously pulls the seat cloth crossbar 40 to drive the seat cloth surrounding the long armrest tube 21, thereby tensioning the seat cloth.

[0057] According to the bed frame 100 of this application embodiment, by setting a seat fabric crossbar 40 on the seat fabric and setting a tension spring 50 between the seat fabric crossbar 40 and the rear seat tube 12, the tension spring 50 can pull the long armrest tube 21 and the seat fabric surrounding the long armrest tube 21, so that the two move downward synchronously to adjust the height of the long armrest tube 21, or adjust the height of the long armrest tube 21 first, and then pull the seat fabric crossbar 40 through the tension spring 50 to drive the seat fabric surrounding the long armrest tube 21 to descend; by setting the extension direction of the tension spring 50 to be orthogonal to the length direction of the seat fabric crossbar 40, the tension spring 50 can be perpendicularly connected to the rear seat tube 12 and the seat fabric crossbar 40, so that the tension spring 50 can pull the seat fabric crossbar 40 directly. With this setting, the tension of the tension spring 50 is more uniform and stable, which can improve the stability and smoothness of the descent of the long armrest tube 21.

[0058] like Figure 1 and Figure 2 As shown, in some embodiments, there are two tension springs 50, and the two tension springs 50 are spaced apart, with one end of the tension spring 50 hanging on the seat cloth crossbar 40.

[0059] Specifically, two tension springs 50 are provided, spaced apart along the length of the fabric crossbar 40. Each tension spring 50 is connected to one end of the fabric crossbar 40. A hook is provided at the end of each tension spring 50 connected to the fabric crossbar 40, allowing the spring to be directly hooked onto the crossbar. This arrangement simplifies the connection between the tension spring 50 and the fabric crossbar 40, and ensures even force distribution across both ends of the crossbar when the tension spring 50 pulls, thus improving stability during operation.

[0060] like Figure 9 As shown, specifically, the distance between the mounting point 41 of the tension spring 50 on the seat cloth crossbar 40 and the end of the seat cloth crossbar 40 adjacent to it is D1, and the length of the seat cloth crossbar 40 is L1, satisfying 0.05≤D1 / L1≤0.15.

[0061] It should be noted that the mounting point 41 of the tension spring 50 on the seat fabric crossbar 40 is the position where the seat fabric crossbar 40 is fixedly connected to one end of the tension spring 50. Since the two tension springs 50 are respectively connected to the two ends of the seat fabric crossbar 40, there are two mounting points 41, which are located at the two ends of the seat fabric crossbar 40 respectively. The distance between the two mounting points 41 and the end of the seat fabric crossbar 40 adjacent to them is D1. Setting D1 / L1 within this range can ensure that the tension spring 50 can stably pull the seat fabric crossbar 40 and improve the smoothness of pulling. If D1 / L1 is greater than or less than this range, the seat fabric crossbar 40 will be subjected to uneven force when the tension spring 50 pulls the seat fabric crossbar 40, and the stability of pulling will be poor.

[0062] like Figure 3 As shown, the rear seat tube 12 further includes: a straight rod portion 121 and an extension tube portion 122 located at both ends of the straight rod portion 121 and connected to the front seat tube 11. The straight rod portion 121 is arranged opposite to the seat cloth crossbar 40, and a fixing hole 1211 is provided on the straight rod portion 121. The other end of the tension spring 50 passes through the fixing hole 1211.

[0063] Specifically, both ends of the straight rod 121 are connected to the extension tube 122. One end of the extension tube 122 is connected to the end of the straight rod 121, and the other end extends towards the front seat tube 11. Two fixing holes 1211 are provided on the straight rod 121, spaced apart and located at both ends of the straight rod 121. The end of the tension spring 50 connected to the straight rod 121 also has a hook, which passes through the fixing hole 1211 and fits within it. This design simplifies the connection between the tension spring 50 and the straight rod 121, and also provides greater stability.

[0064] In some embodiments, the line connecting the mounting point 41 of the tension spring 50 on the seat fabric crossbar 40 and the fixing hole 1211 is orthogonal to the extension direction of the straight rod portion 121, so that the extension direction of the tension spring 50 is orthogonal to the length direction of the seat fabric crossbar 40.

[0065] It should be noted that the fixing hole 1211 on the straight rod 121 corresponds to the mounting point 41 of the tension spring 50 on the seat fabric crossbar 40. In this way, the line connecting the mounting point 41 of the tension spring 50 on the seat fabric crossbar 40 and the fixing hole 1211 is orthogonal to the extension direction of the straight rod 121, so that the tension spring 50 is perpendicular to the seat fabric crossbar 40 and the straight rod 121 respectively. Compared with the prior art where the fixing hole of the tension spring is set in the middle position of the rear seat tube 12, this embodiment moves the fixing hole 1211 to both ends of the straight rod 121, and makes the position of the fixing hole 1211 correspond to the position of the mounting point 41. This can form a straight pull, so that the force direction of the straight rod 121 and the seat fabric crossbar 40 is the same, which can improve the smoothness of the pull and make the descent of the long handrail tube 21 more stable.

[0066] like Figure 3 As shown, specifically, the distance between the fixing hole 1211 and the end of the adjacent straight rod portion 121 is D2, and the length of the straight rod portion 121 is L2, satisfying 0.1≤D2 / L2≤0.2.

[0067] It should be noted that setting D2 / L2 within this range ensures that the fixed positions at both ends of the tension spring 50 are in a straight line. Even if the tension spring 50 is perpendicular to the straight rod 121 and the seat cloth crossbar 40 respectively, the tension of the tension spring 50 is more uniform and stable, which can better pull the seat cloth crossbar 40 and improve the stability and smoothness of the descent of the long handrail tube 21. If D2 / L2 is greater than or less than this range, the fixed positions at both ends of the tension spring 50 cannot form a straight line, that is, a straight pull cannot be formed, the stability of the tension spring 50 is poor, and the stability and smoothness of the descent of the long handrail tube 21 are poor.

[0068] like Figure 1 and Figure 4 As shown, the play bed 1000 according to the embodiment of this application includes: the bed frame 100 and the support frame 200 in the above embodiment. The support frame 200 includes: bottom support legs 210 and support columns 220. The top of the support column 220 is connected to the bottom frame 10 of the bed frame 100 through a rocker arm 240.

[0069] Specifically, the bed frame 100 is connected to the support frame 200, and the bed frame 100 is positioned above the support frame 200. The bottom support foot 210 of the support frame 200 is connected to the support column 220. The bottom support foot 210 is horizontally positioned, and the support column 220 is vertically positioned. Its bottom end is connected to the top of the bottom support foot 210, and its top end is connected to the bottom frame 10 of the bed frame 100 via a rocker arm 240. The rocker arm 240 can swing in the front and back direction, and the bed frame 100 can sway back and forth relative to the support frame 200. With this configuration, the structure of the play bed 1000 is simple, the bed frame 100 can sway back and forth, adding to the fun, and the support frame 200 can support the bed frame 100, improving the overall stability of the play bed 1000.

[0070] like Figure 1 As shown, in some embodiments, there are two support frames 200, which are located on the side of the short armrest tube 22 of the bed frame 100, and the two support columns 220 are connected by a connecting horizontal tube 230.

[0071] Specifically, two support frames 200 are respectively set on the side of the short armrest tube 22 of the bed frame 100, that is, on the left and right sides of the bed frame 100. A connecting horizontal tube 230 is connected between the two support columns 220. The connecting horizontal tube 230 is located below the bottom frame 10, and the extension direction of the connecting horizontal tube 230 is the same as the extension direction of the seat cloth crossbar 40. Setting the support frame 200 on the side of the short armrest tube 22 of the bed frame 100 allows the bed frame 100 to sway in the front and back direction. The connecting horizontal tube 230 connects the two support columns 220, which can improve the stability of the support frame 200, thereby improving the overall stability of the play bed 1000.

[0072] like Figure 1 and Figure 5 As shown, specifically, the connecting horizontal tube 230 includes: a horizontal bar portion 231 and insertion pipe portions 232 located at both ends of the horizontal bar portion 231. The insertion pipe portions 232 are inserted into the support column 220, and the insertion length is 75mm-85mm.

[0073] It should be noted that the extension direction of the crossbar 231 is the same as the extension direction of the seat cloth crossbar 40. One end of the insertion pipe 232 is connected to the end of the crossbar 231, and the other end extends downward. On the opposite side of the two support columns 220, that is, on the inner side of the support column 220, a fixing pipe 224 is provided. The insertion pipe 232 is connected to the support column 220 and is inserted into the fixing pipe 224. The length of the insertion pipe 232 inserted into the fixing pipe 224 is in the range of 75mm-85mm. This ensures that the fitting length between the insertion pipe 232 and the fixing pipe 224 is sufficient, so that the insertion pipe 232 fits better in the fixing pipe 224, improving the stability of the connection between the two, thereby improving the stability of the support frame 200 and preventing the support frame 200 from shaking.

[0074] If the length of the insertion tube 232 inserted into the fixing tube 224 is less than 75mm-85mm, the length of the insertion tube 232 and the fixing tube 224 is too short, and the two cannot be stably connected. The insertion tube 232 is easy to come out of the fixing tube 224, which is not conducive to the stability of the support frame 200. If the length of the insertion tube 232 inserted into the fixing tube 224 is greater than 75mm-85mm, the length of the insertion tube 232 and the fixing tube 224 needs to be increased, which will cause unnecessary waste of materials.

[0075] like Figure 4 As shown, the support column 220 further includes an upper column 221 and a lower column 222 that are plugged together to achieve adjustable length. An upper column plug 223 is provided between the upper column 221 and the lower column 222, and the plug tube 232 is inserted into the upper column plug 223.

[0076] Specifically, the upper column 221 is located above the lower column 222. The upper column 221 can be inserted into / outside the lower column 222. Pulling the upper column 221 upwards can raise the height of the support column 220, and pressing it downwards can lower the height of the support column 220. An upper plunger 223 is provided between the upper column 221 and the lower column 222. The upper plunger 223 is inserted into the upper column 221. The insertion tube 232 is connected to the support column 220 and is inserted into the upper plunger 223, engaging with it. This arrangement allows for height adjustment of the play bed 1000. When the insertion tube 232 is inserted into the upper plunger 223, the upper plunger 223 limits its movement, thereby improving the stability of the support frame 200 and, consequently, the stability of the play bed 1000.

[0077] like Figures 6-8 As shown, in some embodiments, the insertion pipe portion 232 includes: a first arc-shaped pipe section 2321 and a second arc-shaped pipe section 2322 with different diameters and connected to each other. The first arc-shaped pipe section 2321 is provided with a clearance port 23211, and the upper plunger 223 is provided with a limiting piece 2231 that cooperates with the clearance port 23211.

[0078] It should be noted that the diameter of the first arc-shaped pipe segment 2321 is smaller than the diameter of the second arc-shaped pipe segment 2322. The arcs of the first and second arc-shaped pipe segments 2321 face opposite directions, with the arc of the first arc-shaped pipe segment 2321 protruding outwards and the arc of the second arc-shaped pipe segment 2322 protruding inwards. The lower end of the first arc-shaped pipe segment 2321 has a clearance opening 23211, which cooperates with the limiting piece 2231 on the upper plunger 223. The fixed pipe 224 is also configured as two arc-shaped pipe segments with different diameters that are connected to each other. The lower end of the arc-shaped pipe segment of the fixed pipe 224 that cooperates with the first arc-shaped pipe segment 2321 has a clearance groove 2241, which also cooperates with the limiting piece 2231 of the upper plunger 223.

[0079] In this way, by setting the insertion pipe 232 into two arc-shaped pipe segments with different diameters, when it is engaged with the fixed pipe 224, it can prevent it from rotating relative to the fixed pipe 224. By setting the clearance port 23211 on the first arc-shaped pipe segment 2321, it can be engaged with the limiting piece 2231 of the upper plunger 223, so that the upper plunger 223 can circumferentially limit the connecting horizontal pipe 230, thereby improving the stability of the support frame 200 and preventing the support frame 200 from shaking.

[0080] like Figure 6As shown, specifically, a transition tube 233 is provided between the crossbar portion 231 and the insertion tube portion 232. The transition tube 233 is flattened and extends in an arc shape. The transition tube 233 connects the crossbar portion 232 and the insertion tube portion 232. Flattening it prevents deformation of the connecting crossbar 230 during punching and also provides better positioning. Setting the transition tube 233 as an arc transition enhances its safety in use.

[0081] In the description of this application, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A bed frame, characterized in that, include: The base frame includes a front seat tube and a rear seat tube; The top frame includes: a long handrail tube and a short handrail tube; The uprights are arranged between the bottom frame and the top frame to enclose the interior space of the bed through the top frame, the bottom frame and the uprights; A seat cover is fitted inside the bed, and the seat cover has a crossbar positioned opposite the front seat tube and the rear seat tube. The crossbar is connected to the rear seat tube by a tension spring. The extension direction of the tension spring is orthogonal to the length direction of the seat fabric crossbar, and the long armrest tube can be selectively slidably engaged with the upright provided on the front seat tube so that the seat fabric and the long armrest tube move synchronously.

2. The bed frame according to claim 1, characterized in that, There are two tension springs, and the two tension springs are spaced apart. One end of each tension spring is hung on the crossbar of the seat cloth.

3. The bed frame according to claim 2, characterized in that, The distance between the mounting point of the tension spring on the fabric crossbar and the adjacent end of the fabric crossbar is D1, and the length of the fabric crossbar is L1, satisfying 0.05≤D1 / L1≤0.

15.

4. The bed frame according to claim 1, characterized in that, The rear seat tube includes: a straight rod portion and extension tube portions located at both ends of the straight rod portion and connected to the front seat tube. The straight rod portion is disposed opposite to the seat cloth crossbar, and a fixing hole is provided on the straight rod portion. The other end of the tension spring passes through the fixing hole.

5. The bed frame according to claim 4, characterized in that, The line connecting the mounting point of the tension spring on the crossbar and the fixing hole is orthogonal to the extension direction of the straight rod, so that the extension direction of the tension spring is orthogonal to the length direction of the crossbar.

6. The bed frame according to claim 4, characterized in that, The distance between the fixing hole and the end of the adjacent straight rod is D2, and the length of the straight rod is L2, satisfying 0.1≤D2 / L2≤0.

2.

7. A play bed, characterized in that, include: The bed frame according to any one of claims 1-6; A support frame, comprising: bottom support legs and support columns, the top of which is connected to the bottom frame of the bed frame via a rocker arm.

8. The play bed according to claim 7, characterized in that, There are two support frames, which are located on the side of the short armrest tube of the bed frame, and the two support columns are connected by a connecting horizontal tube.

9. The play bed according to claim 8, characterized in that, The connecting horizontal tube includes a horizontal bar portion and insertion pipe portions located at both ends of the horizontal bar portion. The insertion pipe portions are inserted into the support column, and the insertion length is 75mm-85mm.

10. The play bed according to claim 9, characterized in that, The support column includes an upper column and a lower column that are plugged together to achieve adjustable length, an upper column plug is provided between the upper column and the lower column, and the plug tube is inserted into the upper column plug.

11. The play bed according to claim 10, characterized in that, The insertion tube includes: a first arc-shaped tube segment and a second arc-shaped tube segment with different diameters and connected to each other. The first arc-shaped tube segment is provided with a clearance opening, and the upper plunger is provided with a limiting piece that cooperates with the clearance opening.

12. The play bed according to claim 9, characterized in that, A transition tube is provided between the crossbar and the insertion tube. The transition tube is flattened and extends in an arc shape.

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