Adjustable bedstead

Abstract

The utility model discloses an adjustable bed frame which comprises transverse supporting parts arranged on the two sides of the width direction of the bed frame in pairs, longitudinal supporting parts arranged on the two sides of the length direction of the bed frame in pairs, and a closed bed frame defined by the longitudinal supporting parts in pairs and the transverse supporting parts in pairs in a connected mode. At least one of the longitudinal supporting part and the transverse supporting part is of a telescopic structure, the telescopic structure comprises a sleeve and an insertion pipe inserted into the sleeve, a first guide sleeve is installed on the sleeve, a second guide sleeve is installed on the insertion pipe, and the first guide sleeve and the second guide sleeve are connected in a sleeved mode. And the first guide sleeve and the second guide sleeve compensate a gap between the sleeve and the insertion tube so as to guide the sleeve and the insertion tube to stably slide and stretch relative to each other. The adjusting device is large in adjusting range and convenient to adjust.

Description

Technical Field

[0001] The utility model relates to the field of bed frames, in particular to an adjustable bed frame. Background Art

[0002] Existing beds generally consist of a bed frame and a mattress placed on the bed frame. In order to increase the applicability of the bed frame, the length and width of the bed frame are generally adjustable, but the adjustment range is limited. In addition, the adjustment position is generally limited by screws. When adjusting, tools such as screwdrivers are required, and the adjustment operation is complicated. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the utility model provides an adjustable bed frame, which has the advantages of a large bed frame range and convenient adjustment.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An adjustable bed frame includes paired transverse support portions arranged on both sides of the bed frame in a width direction, and paired longitudinal support portions arranged on both sides of the bed frame in a length direction, wherein the paired longitudinal support portions and the paired transverse support portions are connected to form a closed bed frame;

[0006] At least one of the longitudinal support portion and the transverse support portion is configured as a telescopic structure, and the telescopic structure includes a sleeve and a cannula inserted into the sleeve, a first guide sleeve is installed on the sleeve, and a second guide sleeve is installed on the cannula, and the first guide sleeve and the second guide sleeve compensate for the gap between the sleeve and the cannula and guide the two to slide and telescope stably relative to each other.

[0007] By adopting the above technical solution, the longitudinal length and / or lateral length of the bed frame can be changed by changing the length of the telescopic structure. The telescopic structure is in the form of a sleeve and a cannula, so that a larger range of adjustment can be achieved and the adjustment is convenient. In addition, the gap between the sleeve and the cannula is compensated by the first guide sleeve and the second guide sleeve, so that the relative position of the sleeve and the cannula is more stable and the telescopic structure is smoother.

[0008] Optionally, the inner side of the first guide sleeve is shaped to adapt to the outer wall of the cannula, and / or the outer side of the second guide sleeve is shaped to adapt to the inner wall of the cannula.

[0009] By adopting the above technical solution, the first guide sleeve supports and guides the cannula more accurately, and the second guide sleeve supports and guides the cannula more accurately.

[0010] Optionally, a first guide rib is protruded from the inner side of the first guide sleeve along the sliding and telescopic direction, and / or a second guide rib is protruded from the outer side of the second guide sleeve along the sliding and telescopic direction.

[0011] By adopting the above technical solution, the first guide rib reduces the contact area between the first guide sleeve and the cannula, thereby reducing the moving friction and making the extension and retraction smoother; the second guide rib reduces the contact area between the second guide sleeve and the cannula, thereby reducing the moving friction and making the extension and retraction smoother.

[0012] Optionally, the telescopic structure includes two inserting tubes, which are respectively inserted into the sleeve from both axial ends thereof; or, the telescopic structure includes two sleeves, which are respectively inserted into the sleeve from both axial ends thereof.

[0013] By adopting the above technical solution, the structure of the telescopic structure can take various forms and has high manufacturing flexibility.

[0014] Optionally, the first guide sleeve is provided with a buckle, and a plurality of buckle positions are provided on the cannula at intervals along the sliding and telescopic direction, and the buckle can be operably buckled into one of the plurality of buckle positions to lock the telescopic structure.

[0015] By adopting the above technical solution, the length of the telescopic structure can be limited by the cooperation between the buckle and one of the buckle positions, so that the entire bed frame is not easily deformed.

[0016] Optionally, the inner surface of the second guide sleeve has a pair of first connecting protrusions; the end of the cannula is provided with a pair of first connecting slots; the first connecting slots are adapted to the first connecting protrusions;

[0017] The inner surface of the first guide sleeve is provided with a pair of second connecting protrusions; the end of the sleeve is provided with a pair of second connecting grooves; the second connecting grooves are adapted to the second connecting protrusions.

[0018] By adopting the above technical solution, the second guide sleeve is connected to the cannula by the cooperation of the first connecting protrusion and the first connecting slot, and the first guide sleeve is connected to the cannula by the cooperation of the second connecting protrusion and the second connecting slot, which is convenient for disassembly and assembly.

[0019] Optionally, the first connecting protrusion and the second connecting protrusion are respectively provided with an installation guiding inclined surface, and the first connecting plate and the second connecting plate are driven to turn outwards by the installation guiding inclined surface.

[0020] By adopting the above technical solution, when the second guide sleeve is put on the cannula, due to the guiding effect of the installation guide bevel of the first connecting protrusion, the first connecting plate will be turned outward, thereby facilitating the first connecting protrusion to enter the first connecting slot; based on the same principle, the presence of the installation guide bevel facilitates the second connecting protrusion to enter the second connecting slot, so there is no need to manually turn outward the first connecting plate or the second connecting plate, saving time and effort.

[0021] Optionally, at least one of the longitudinal support portion and the transverse support portion is configured as two upper and lower telescopic structures; a vertical support rod is provided between the upper and lower telescopic structures.

[0022] By adopting the above technical solution, the two sets of telescopic structures and the vertical support rods cooperate to make the entire bed frame stronger and able to bear a greater weight.

[0023] Optionally, three longitudinal support parts are included; both ends of the middle longitudinal support part are detachably connected to a pair of transverse support parts respectively.

[0024] Optionally, three longitudinal support parts are included; both ends of the middle longitudinal support part are detachably connected to a pair of transverse support parts respectively.

[0025] By adopting the above technical solution, a longitudinal support portion is added in the middle of the bed frame, thereby improving the support capacity of the middle part of the mattress and avoiding deformation of the middle part of the mattress due to insufficient support.

[0026] Optionally, a number of longitudinally distributed intermediate support members are provided between the three longitudinal support parts; the intermediate support members include an intermediate support frame and a pair of intermediate support rods; the intermediate support frame is detachably connected to the middle longitudinal support part; the close ends of a pair of intermediate support rods are detachably connected to the intermediate support frame, and the far ends are detachably connected to the longitudinal support parts on both sides.

[0027] By adopting the above technical solution, the presence of the intermediate support member increases the stress points, making the stress more dispersed, avoiding stress concentration, and improving the supporting capacity of the bed frame.

[0028] Optionally, the bottom of the intermediate support frame is formed with a first mounting groove that is compatible with the longitudinal support part, and the top is formed with a pair of second mounting grooves that are compatible with the intermediate support rod; a lower plug rod is formed on the top wall of the first mounting groove; an upper plug rod is formed on the bottom wall of the second mounting groove; a plurality of first insertion holes distributed along the length direction of the longitudinal support part are formed on the top surface of the middle; the first insertion holes are compatible with the lower plug rod; a plurality of second insertion holes distributed along the length direction of the intermediate support rod are formed on the bottom surface of the intermediate support rod; the second insertion holes are compatible with the upper plug rod; the end of the intermediate support rod away from the intermediate support frame is detachably connected to the longitudinal support part on the corresponding side.

[0029] By adopting the above technical solution, the intermediate support frame is mounted on the longitudinal support part from top to bottom through the first mounting groove and the lower insertion rod is inserted into the first insertion hole of the longitudinal support part, and then the intermediate support rod is installed; when the longitudinal length of the bed frame changes, the intermediate support frame and the intermediate support rod on the corresponding side are added; when the transverse length of the bed frame changes, the upper insertion rod is inserted into the second insertion hole corresponding to the bottom of the intermediate support rod, which makes disassembly and assembly convenient.

[0030] Optionally, the longitudinal support parts on both sides are formed with a plurality of connection sockets distributed along their length directions; the connection sockets are adapted to the middle support rods.

[0031] By adopting the above technical solution, the connection socket and the middle support rod are matched so that the middle support rod is not easily displaced, and is easy to process and disassemble.

[0032] Optionally, a plurality of U-shaped connecting brackets distributed along the length direction of the longitudinal support parts on both sides are formed on the end surfaces close to each other; the openings of the connecting brackets face upward and are adapted to the middle support rod.

[0033] By adopting the above technical solution, the middle support rod only needs to be moved downward during installation so that one end is inserted into the opening of the connecting bracket, and the second jack is sleeved on the upper plug rod of the middle support frame, which makes disassembly and assembly more convenient.

[0034] Optionally, four supporting legs are further included; the four supporting legs are respectively located at the four corners of the bed frame; and the ends of the longitudinal supporting portion and the transverse supporting portion are respectively detachably connected to the supporting legs.

[0035] By adopting the above technical solution, the presence of the supporting feet makes it more convenient to connect the longitudinal supporting part and the transverse supporting part. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural diagram of embodiment 1 of the present utility model.

[0037] Figure 2 It is a structural schematic diagram of the lateral support portion of the first embodiment of the present utility model.

[0038] Figure 3 It is a schematic diagram of the exploded structure of the transverse support portion of the first embodiment of the present utility model.

[0039] Figure 4 The utility model Figure 3 Schematic diagram of the partially enlarged structure of A in the middle.

[0040] Figure 5 It is a structural schematic diagram of the second guide sleeve of the first embodiment of the present utility model.

[0041] Figure 6 It is a structural schematic diagram of the first guide sleeve of the first embodiment of the present utility model.

[0042] Figure 7 It is a structural schematic diagram of the first guide sleeve of the first embodiment of the present utility model.

[0043] Figure 8 It is a structural schematic diagram of the longitudinal support portion of the first embodiment of the present utility model.

[0044] Figure 9 It is a structural schematic diagram of the support foot of the first embodiment of the present utility model.

[0045] Figure 10 It is a structural schematic diagram of the middle longitudinal support portion and several middle support members of the first embodiment of the present utility model.

[0046] Figure 11 It is a structural schematic diagram of the middle longitudinal support portion of the first embodiment of the present utility model.

[0047] Figure 12 It is a structural schematic diagram of the intermediate support frame of the first embodiment of the present utility model.

[0048] Figure 13 It is a schematic structural diagram of the cross section of the intermediate support frame of the first embodiment of the present utility model.

[0049] Figure 14 It is a structural schematic diagram of the middle support rod of the first embodiment of the present utility model.

[0050] Description of reference numerals:

[0051] 10. Telescopic structure; 100. U-shaped groove; 101. Mounting guide slope; 11. Sleeve; 110. Second connecting slot; 12. Insertion tube; 120. First connecting slot; 121. Limiting slot; 13. Second guide sleeve; 131. First connecting plate; 132. First connecting protrusion; 14. First guide sleeve; 141. Second connecting plate; 142. Second connecting protrusion; 143. Third connecting plate; 1430. Unlocking drive slot; 144. Limiting protrusion; 145. Guide ring; 146. First guide rib;

[0052] 20. Horizontal support portion;

[0053] 30. Longitudinal support portion; 300. Connecting jack; 301. First jack;

[0054] 40. Support foot; 41. Support main pole; 42. Corner bracket; 420. First corner socket; 421. Second corner socket; 43. Reinforcement rib;

[0055] 50, middle support member; 51, middle support frame; 510, first mounting slot; 511, second mounting slot; 512, lower insertion rod; 513, upper insertion rod; 52, middle support rod; 520, second insertion hole;

[0056] 60. Vertical support rod. DETAILED DESCRIPTION

[0057] The following is combined with Figure 1-14 The utility model is described in further detail.

[0058] Example 1: Disclose an adjustable bed frame, refer to Figure 1 , including a rectangular bed frame; the bed frame includes a pair of parallel longitudinal support parts 30, a pair of parallel transverse support parts 20 and four support legs 30; the four support legs 30 are respectively located at the four corners of the bed frame; the ends of the longitudinal support parts 30 and the transverse support parts 20 are respectively detachably connected to the support legs 30; the longitudinal support parts 30 and the transverse support parts 20 are both configured as two groups of telescopic structures 10 distributed up and down; in other embodiments, the support legs 30 may not be required, and the longitudinal support parts 30 and the transverse support parts 20 are connected to each other near one end by snapping or plugging.

[0059] refer to Figure 2-Figure 4 The telescopic structure 10 includes a sleeve 11, two inserting tubes 12, two second guide sleeves 13, and two first guide sleeves 14. The sleeve 11 and the inserting tube 12 are both metal square tubes. The second guide sleeve 13 and the first guide sleeve 14 are both wear-resistant plastic parts. The two inserting tubes 12 are telescopically arranged at both ends of the sleeve 11. The second guide sleeve 13 is detachably connected to the end where the inserting tube 12 enters the sleeve 11 and slides axially within the sleeve 11. The two first guide sleeves 14 are detachably connected to both ends of the sleeve 11. In other embodiments, the telescopic structure 10 may have only one inserting tube 11, one inserting tube 12, one first guide sleeve 14, and one second guide sleeve; or the telescopic structure 10 may include two sleeves 12, one inserting tube 12, two second guide sleeves 13, and two first guide sleeves 14. The connection method between the various components of the telescopic structure 10 of the above two structures is the same as the connection method in the first embodiment.

[0060] refer to Figure 4 and Figure 5The second guide sleeve 13 is in the shape of a rectangular frame, so that the outer side of the second guide sleeve 13 is in the shape of a rectangular column that matches the inner wall of the sleeve 11; the second guide sleeve 13 is formed with a U-shaped groove 100 on a pair of vertical side walls close to the sleeve 11, and the part inside the U-shaped groove 100 is a first connecting plate 131; the inner surfaces of the pair of first connecting plates 131 are respectively formed with cylindrical first connecting protrusions 132; the pair of vertical side walls of the end of the cannula 12 extending into the sleeve 11 are respectively formed with the first connecting protrusions 132 is adapted to the first connecting card groove 120; in order to facilitate the connection of the second guide sleeve 13, the first connecting protrusion 132 is formed with an inclined mounting guide slope 101 at one end away from the U-shaped groove 100. When the second guide sleeve 13 is sleeved on the end of the cannula 12, the end of the cannula 12 turns the first connecting plate 131 outward through the mounting guide slope 101, so that the first connecting protrusion 132 reaches the outer surface of the cannula 12 until it enters the first connecting card groove 120 on the corresponding side.

[0061] refer to Figure 4 and Figure 6 The first guide sleeve 14 is in the shape of a rectangular frame, so that the inner side of the first guide sleeve 14 presents a rectangular column shape that matches the outer wall of the cannula 12; the first guide sleeve 14 is respectively formed with a U-shaped groove 100 on a pair of vertical side walls near the sleeve 11; the part inside the U-shaped groove 100 is a second connecting plate 141; the inner surfaces of a pair of second connecting plates 141 are respectively formed with cylindrical second connecting protrusions 142; a pair of vertical side walls at both ends of the sleeve 11 are respectively formed with second connecting card grooves 110 that are adapted to the second connecting protrusions 142; in order to facilitate the connection of the first guide sleeve 14, the second connecting protrusion 142 is formed with an inclined mounting guide inclined surface 101 near one end of the U-shaped groove 100. When the first guide sleeve 14 is sleeved on the end of the sleeve 11, the end of the sleeve 11 passes through the mounting guide inclined surface 101 to turn the second connecting plate 141 outward, so that the second connecting protrusion 142 reaches the outer surface of the sleeve 11 until it enters the second connecting card groove 110 on the corresponding side.

[0062] In other embodiments, the inner side of the first guide sleeve 14 can be selected to cooperate with the outer wall of the cannula 12 or the second guide sleeve 13 can be selected to cooperate with the inner wall of the sleeve 11. In this way, only one of the first guide sleeve 14 and the second guide sleeve 13 needs to be manufactured with improved precision, while the other does not need too high manufacturing precision, thereby reducing production costs.

[0063] refer to Figure 4 and Figure 6, a buckle is provided on the vertical side wall of the inner side of the first guide sleeve 14 away from the sleeve 11, and a plurality of buckle positions are provided on the insertion tube 12 at intervals along the sliding and telescopic direction; wherein the buckle specifically includes a third connecting plate 143 and a cylindrical limiting protrusion 144 formed on the inner side wall of the third connecting plate 143; and wherein a U-shaped groove 100 is formed on the vertical side wall of the inner side of the first guide sleeve 14 away from the sleeve 11, so that the part inside the U-shaped groove 100 is the third connecting plate 143; and the buckle position is a limiting card groove 121 formed on the inner side wall of the insertion tube 12; the limiting card groove 121 is adapted to the limiting protrusion 144; in order to prevent the limiting protrusion 144 from accidentally entering the first connecting card groove 120, the first connecting card groove 120 and the limiting card groove 121 are staggered up and down. Reference Figure 7 To facilitate the outward rotation of the third connecting plate 143, an unlocking drive groove 1430 is formed on the outer cylindrical surface of the third connecting plate 143. In other embodiments, the first guide sleeve 14 may not have a buckle, and the insertion tube 12 may not have a buckle position. In this way, the telescopic structure 10 cannot be limited to a specific length, but adjustment is more convenient.

[0064] When it is necessary to change the extension amount of the cannula 12, a fingernail is manually inserted into the unlocking drive groove 1430 to turn the third connecting plate 143 outward, so that the limiting protrusion 144 is separated from the limiting slot 121, so that the cannula 12 can be telescopically moved along the sleeve 11; due to the presence of the second guide sleeve 13, the cannula 12 can be telescopically moved more smoothly during adjustment, and the second guide sleeve 13 is conducive to reducing the radial gap between the cannula 12 and the sleeve 11, making the positions of the two more stable.

[0065] refer to Figure 6 In order to further improve the position of the cannula 12 and the sleeve 11, the inner surface of the end of the first guide sleeve 14 where the limiting protrusion 144 is located extends inward to form a rectangular frame-shaped guide ring 145; the inner surface of the guide ring 145 and the inner surface of the first guide sleeve 14 close to the sleeve 11 are both formed with a number of evenly distributed first guide ribs 146 along their circumference, and the first guide ribs 146 are parallel to the telescopic direction; the inner surface of the first guide rib 146 contacts the outer surface of the cannula 12 or the outer surface of the sleeve 11, and the existence of the first guide rib 146 reduces the first guide sleeve 14 and the sleeve The contact area of ​​the tube 11 is small, and the moving friction force is small when disassembling and assembling the first guide sleeve 14. In addition, the first guide sleeve 14 is not easy to move; the existence of the first guide rib 146 reduces the contact area between the first guide sleeve 14 and the cannula 12, thereby reducing the friction force and making the extension and retraction process smoother; in order to further improve the smoothness of the extension and retraction process, a number of evenly distributed second guide ribs are formed on the outer surface of the second guide sleeve along its circumference, and the second guide ribs are parallel to the extension direction. The outer surface of the second guide rib is in contact with the inner surface of the cannula 12, and the working principle of the second guide rib is the same as that of the first guide rib 146.

[0066] refer to Figure 1 and Figure 9 The support leg 40 comprises a main support rod 41 and a pair of L-shaped corner brackets 42 welded to each end of the main support rod 41. The corner brackets 42 are formed at each end with a first corner socket 420 for horizontal insertion of the end of the insert tube 12 of the transverse support portion 20 away from the sleeve 11, and a second corner socket 421 for horizontal insertion of the end of the insert tube 12 of the longitudinal support portion 30 away from the sleeve 11. To prevent accidental separation, the insert tube 12 and the support leg 40 are connected integrally by a latch. To increase the strength of the support leg 40, reinforcing ribs 43 are welded between the main support rod 41 and the ends of the corner brackets 42.

[0067] In order to increase the support strength of the transverse support portion 20 and the longitudinal support portion 30, refer to Figure 2 , a vertical support rod 60 is fixed between a pair of upper and lower sleeves 11 of the lateral support portion 20 to form an I-shaped lateral intermediate support member; Figure 8 Of course, given the long longitudinal length of the bed frame, to prevent the telescopic structure 10 of the longitudinal support portion 30 from bending, a plurality of vertical support rods 60 distributed along its length are connected between the pair of vertically spaced inserts 12 of the longitudinal support portion 30. Vertical support rods 60 are also fixed between the pair of vertically spaced sleeves 11 of the longitudinal support portion 30 to form an I-shaped longitudinal intermediate support member. Of course, if necessary, a plurality of vertical support rods 60 distributed along its length can also be connected between the pair of vertically spaced inserts 12 of the transverse support portion 20, thereby increasing the support strength of the transverse support portion 20.

[0068] In order to increase the support for the middle part of the mattress, another longitudinal support part 30 is provided between the pair of longitudinal support parts 30; a pair of U-shaped side support frames distributed up and down are respectively formed on the end faces of the pair of longitudinal support parts 30 that are close to each other, and the end of the insertion tube 12 of the middle longitudinal support part 30 is vertically inserted into the opening of the side support frame.

[0069] In order to make the bed frame bear more weight and disperse the force, refer to Figure 1 and Figure 10 A plurality of longitudinally distributed intermediate support members 50 are arranged between the three longitudinal support parts 20; the intermediate support members 50 include an intermediate support frame 51 and a pair of intermediate support rods 52; the intermediate support rods 52 are metal square tubes; the intermediate support frame 51 is made of metal material; the intermediate support frame 51 is detachably connected to the middle longitudinal support part 30; the close ends of the pair of intermediate support rods 52 are detachably connected to the intermediate support frame 51, and the far ends are detachably connected to the longitudinal support parts 30 on both sides.

[0070] refer to Figure 12 and Figure 13The bottom of the intermediate support frame 51 is formed with a first placement groove 510 adapted to the longitudinal support portion 30, and the top is formed with a pair of second placement grooves 511 adapted to the intermediate support rod 52; a lower insertion rod 512 is formed on the top wall of the first placement groove 510; an upper insertion rod 513 is formed on the bottom wall of the second placement groove 511; Figure 11 , the top surfaces of the insert tube 12 and the pair of sleeves 11 of the middle longitudinal support portion 30 are both formed with a first insertion hole 301; the first insertion hole 301 is distributed along the length direction of the longitudinal support portion 30; the first insertion hole 301 is adapted to the lower insertion rod 512; reference Figure 14 , the bottom surface of the middle support rod 52 is formed with a plurality of second insertion holes 520 distributed along its length direction; the second insertion holes 520 are adapted to the upper insertion rod 512; Figure 7 The inner side walls of a pair of inserting tubes 12 and sleeves 11 of the longitudinal support parts 30 on both sides are respectively formed with connecting sockets 300 for horizontal insertion of the middle support rod 52; the connecting sockets 300 are distributed along the length direction of the longitudinal support part 30.

[0071] In other embodiments, the connecting socket 300 may not be processed, but a number of U-shaped connecting brackets distributed along the length direction may be welded on the end faces of the longitudinal support parts 30 on both sides that are close to each other; the positions of the connecting brackets may correspond one-to-one to the connecting sockets 300, and the openings of the connecting brackets may face upward and be compatible with the middle support rod 52; in this way, in the process of inserting the middle support rod 52 into the opening of the connecting bracket, the upper insertion rod 513 is also inserted into the second socket 520, which is more effective than the method in Example 1.

[0072] Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is that the bed frame includes a pair of parallel longitudinal support parts 30, three parallel transverse support parts 20 and four support legs 40; the support legs 40 include a supporting main rod 41 and an L-shaped corner bracket 42 welded to the upper end of the supporting main rod 41; the longitudinal support part 30 and the transverse support part 20 are both arranged as a group of telescopic structures 10; four groups of telescopic structures 10 and four corner brackets 42 form a rectangular frame of the bed frame; the bottom of the sleeve 11 of the telescopic structure 10 is fixed with an auxiliary support leg; in this way, the entire bed frame has 9 ground support parts, namely four supporting main rods 41 and five auxiliary support legs.

[0073] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adjustable bed frame, characterized by: The bed frame comprises a pair of transverse support parts arranged on both sides of the bed frame in the width direction, and a pair of longitudinal support parts arranged on both sides of the bed frame in the length direction, wherein the paired longitudinal support parts and the paired transverse support parts are connected to form a closed bed frame; At least one of the longitudinal support portion and the transverse support portion is configured as a telescopic structure, and the telescopic structure includes a sleeve and a cannula inserted into the sleeve, a first guide sleeve is installed on the sleeve, and a second guide sleeve is installed on the cannula, and the first guide sleeve and the second guide sleeve compensate for the gap between the sleeve and the cannula and guide the two to slide and telescope stably relative to each other.

2. The adjustable bed frame according to claim 1, characterized in that: The inner side of the first guide sleeve is shaped to adapt to the outer wall of the cannula, and / or the outer side of the second guide sleeve is shaped to adapt to the inner wall of the cannula.

3. The adjustable bed frame according to claim 1, characterized in that: A first guide rib is protruded from the inner side of the first guide sleeve along the sliding and telescopic direction, and / or a second guide rib is protruded from the outer side of the second guide sleeve along the sliding and telescopic direction.

4. The adjustable bed frame according to claim 1, characterized in that: The telescopic structure includes two inserting tubes, which are respectively inserted into the sleeve from both axial ends thereof; or the telescopic structure includes two sleeves, which are respectively inserted into the two axial ends thereof.

5. The adjustable bed frame according to claim 1, characterized in that: The first guide sleeve is provided with a buckle, and a plurality of buckle positions are arranged at intervals on the cannula along the sliding and telescopic direction. The buckle can be operably buckled into one of the plurality of buckle positions to lock the telescopic structure.

6. The adjustable bed frame according to claim 1, characterized in that: The inner surface of the second guide sleeve has a pair of first connecting protrusions; the end of the cannula is provided with a pair of first connecting slots; the first connecting slots are adapted to the first connecting protrusions; The inner surface of the first guide sleeve is provided with a pair of second connecting protrusions; the end of the sleeve is provided with a pair of second connecting grooves; the second connecting grooves are adapted to the second connecting protrusions.

7. The adjustable bed frame according to claim 6, characterized in that: A U-shaped groove is formed on a pair of vertical side walls of the second guide sleeve close to the sleeve, and the portion inside the U-shaped groove is a first connecting plate, and the first connecting protrusion is provided on the inner surface of the first connecting plate; A U-shaped groove is formed on a pair of vertical side walls of the first guide sleeve close to the sleeve, and the portion inside the U-shaped groove is the second connecting plate; the second connecting protrusion is provided on the inner surface of the second connecting plate; The first connecting protrusion and the second connecting protrusion are respectively provided with an installation guiding inclined surface, and the first connecting plate and the second connecting plate are driven to turn outwards through the installation guiding inclined surface.

8. The adjustable bed frame according to claim 1, characterized in that: At least one of the longitudinal support portion and the transverse support portion is configured as two upper and lower telescopic structures; a vertical support rod is provided between the upper and lower telescopic structures.

9. The adjustable bed frame according to claim 1, characterized in that: It comprises three longitudinal support parts; two ends of the middle longitudinal support part are respectively detachably connected to a pair of transverse support parts.

10. The adjustable bed frame according to claim 9, characterized in that: Several longitudinally distributed intermediate support members are arranged between the three longitudinal support parts; the intermediate support members include an intermediate support frame and a pair of intermediate support rods; the intermediate support frame is detachably connected to the middle longitudinal support part; the close ends of a pair of intermediate support rods are detachably connected to the intermediate support frame, and the far ends are detachably connected to the longitudinal support parts on both sides.

11. The adjustable bed frame according to claim 10, characterized in that: The bottom of the intermediate support frame is formed with a first mounting groove adapted to the longitudinal support part, and the top is formed with a pair of second mounting grooves adapted to the intermediate support rod; a lower plug rod is formed on the top wall of the first mounting groove; an upper plug rod is formed on the bottom wall of the second mounting groove; a plurality of first insertion holes distributed along the length direction of the longitudinal support part are formed on the top surface of the middle; the first insertion holes are adapted to the lower plug rod; a plurality of second insertion holes distributed along the length direction of the longitudinal support rod are formed on the bottom surface of the intermediate support rod; the second insertion holes are adapted to the upper plug rod; the end of the intermediate support rod away from the intermediate support frame is detachably connected to the longitudinal support part on the corresponding side.

12. The adjustable bed frame according to claim 11, characterized in that: The longitudinal support parts on both sides are formed with a plurality of connection sockets distributed along the length direction thereof; the connection sockets are adapted to the middle support rods.

13. The adjustable bed frame according to claim 11, characterized in that: A plurality of U-shaped connecting brackets distributed along the length direction are formed on the end surfaces of the longitudinal supporting parts on both sides that are close to each other; the openings of the connecting brackets face upward and are adapted to the middle supporting rod.

14. The adjustable bed frame according to claim 1, characterized in that: It also includes four supporting legs; the four supporting legs are respectively located at the four corners of the bed frame; the ends of the longitudinal supporting part and the transverse supporting part are respectively detachably connected to the supporting legs.

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