GB2567345A

GB2567345A - Screwless connection structure of combined bedstead

Info

Publication number: GB2567345A
Application number: GB1821153.2A
Authority: GB
Inventors: Chen Xusheng
Original assignee: House and Home Co Ltd
Current assignee: House and Home Co Ltd
Priority date: 2016-07-28
Filing date: 2017-05-03
Publication date: 2019-04-10
Anticipated expiration: 2037-05-03
Also published as: CN206295155U; GB2567345B; WO2018018980A1; GB201821153D0

Abstract

Disclosed is a screwless connection structure of a combined bedstead. The bedstead comprises four support posts (1), bed beam columns (21, 31) are connected between two of the support posts (1), either end face of the bed beam columns (21, 31) is provided with at least one positioning sheet (51) protruding outward and extending to one side, the positioning sheet (51) on the outer side of the respective bed beam column (21, 31) on the support post (1) is provided with a positioning opening (11) into which the positioning sheet (51) is embedded after insertion, and the support post (1) is provided with a positioning boss (12), wherein same is ejected upward and abuts against one side of the bed beam column (21, 31) after the insertion of the positioning sheet (51). The positioning sheet (51) protrudes outward to the end face of the bed beam column (21, 31) and extends downward, and the positioning boss (12) is located above or below the bed beam column (21, 31). Either end face of the bed beam column (21, 31) is provided with a connecting sheet (211), the positioning sheet (51) is arranged on the outer side of the connecting sheet (211), the connecting sheet (211) is provided with a positioning hole (212), and the positioning boss (12) passes through and is positioned in the positioning hole (212) when same is ejected upward. With this structure, assembly and connection can be implemented without using any screws, so that the assembly and disassembly are more convenient.

Description

SCREWLESS CONNECTION STRUCTURE OF COMBINED BEDSTEAD

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a bedstead, and more particularly to a screwless connection structure of a combined bedstead.

2. Description of the Prior Art

In general, a bedstead comprises a bed frame and bed legs. The bed frame generally comprises two longitudinal bed beams and two transverse bed beams to form a rectangular bed frame. The middle portion of the bed frame is provided with rods arranged in a row or a T-shaped frame to form a support for a bed board or mattress.

Traditional welded beds no longer require hardware for connection, but the volume is large, the packaging is too large, and the logistics cost is relatively high. When the bed frame is assembled and connected, the bed beams are generally combined with the bed legs, so that screw holes and screws are required for connection or welding. The assembly is cumbersome.

If necessary, the end of the bed frame may be formed with a head frame or a headboard, and the other end may be provided with a foot frame or a footboard. The bed frame may be surrounded by side frames to form a fence, especially for children's beds or bunk beds. For the upper bedstead of the bunk bed, the bed frame is surrounded by side frames to form a fence. The upper and lower bed frames are connected to the four posts of the bedstead, and a ladder is provided between the upper and lower beds. For the combined connection of the rods and the frame of the bedstead, a predetermined joint between each post (or each leg) of the bedstead and the side rod or the side frame is formed with screw holes, and a sufficient number of screws are provided for connection.

There are many inconveniences for the connection of the rods of the above bedstead:

(1) It takes time and effort for the assembly and connection. Consumers need to refer to the explanation documents and legends. The screws are connected one by one, and the rods are assembled in turn. The work of screwing is relatively complicated. If the assembly is misassembled accidentally, the screws must be unscrewed and then screwed again. The assembly process is time-consuming and inconvenient.

(2) It is easy to damage the structure during assembly. The screw hole may be drilled obliquely and then re-drilled, which will damage the component easily. The screws may be installed obliquely due to uneven applied force, which will affect the structural strength.

(3) The structure is scattered and the disassembly is complicated. When it is necessary to carry the bedstead, the consumer has to remove the screws in turn and then disassemble the bedstead. The disassembly workload is heavy, and the strength of the components of the bedstead will be affected to a certain extent.

(4) In general, manufacturers drill the screw hole on the outside for the consumer to lock the screws. After the bedstead is combined and connected, the screws face outward, and a lot of metal screw heads are seen in the bedstead. This affects the appearance of the bedstead.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a screwless connection structure of a combined bedstead. There is no need to use screws for assembly, so that the assembly and disassembly are more convenient, avoiding problems such as time-consuming and labor-intensive assembly and scattered structure.

In order to achieve the above object, the present invention adopts the following technical solutions:

A screwless connection structure of a combined bedstead is provided. The bedstead comprises four support posts. A bed beam is connected between two of the support posts. Either end face of the bed beam is provided with at least one positioning sheet protruding outward and extending toward one side thereof. Each support post is provided with a positioning opening corresponding to the positioning sheet on the end face of the bed beam. The positioning sheet is embedded into the positioning opening after being inserted. Each support post is provided with a positioning boss. After the positioning sheet is inserted, the positioning boss is ejected upward to block one side of the bed beam.

Preferably, the positioning sheet protrudes outward from the end face of the bed beam and extends downward, and the positioning boss is located above or below the bed beam.

Preferably, either end face of the bed beam is provided with a connecting sheet. The positioning sheet is disposed on an outer side of the connecting sheet. The connecting sheet is provided with a positioning hole. The positioning boss is inserted through and positioned in the positioning hole when the positioning bass is ejected upward.

Preferably, one side of the positioning boss is provided with a limiting pin. The limiting pin and the positioning boss are disposed on an elastic suspension sheet. Each support post is formed with limiting holes respectively corresponding to the positioning boss and the limiting pin. The limiting pin is rotatably connected to the elastic suspension sheet. The limiting pin is limited at an outer side of a corresponding one of the limiting holes after being rotated. The positioning boss is limited in a state of being ejected upward when the limiting pin is limited.

Preferably, each support post is formed with a limiting hole corresponding to the positioning boss. The positioning boss is rotatably connected to an elastic suspension sheet. The positioning boss is limited at an outer side of the limiting hole of the support post and in a state of being unable to be pressed.

Preferably, a guardrail side frame is provided between two of the support posts. The guardrail side frame is connected to the bed beam or directly connected between two of the support posts. The guardrail side frame includes two outer horizontal rods and two outer longitudinal rods to form a side frame. An outer side face of each outer longitudinal rod is provided with a positioning sheet protruding outward and extending toward one side thereof. Each support post is provided with a positioning opening corresponding to the positioning sheet of the guardrail side frame. Each outer longitudinal rod is provided with at least one positioning hole corresponding to the positioning boss of each support post. The positioning boss is ejected upward and positioned in the positioning hole of the outer longitudinal rod when the positioning sheet of the outer longitudinal rod is inserted and positioned.

Preferably, the positioning sheet protrudes outward from the outer side face of the outer longitudinal rod to extend upward, downward, leftward or rightward.

Preferably, a plurality of longitudinal poles are provided between two bed beams. Either end of each longitudinal pole is pressed into a sheet-shaped engaging head. A lower side edge of the engaging head is formed with an engaging groove. An inner side of each bed beam is formed with a plurality of T-shaped slots that are evenly arranged in a longitudinal direction. The engaging groove of each engaging head is engaged in a notch in the middle of a corresponding one of the T-shaped slots.

Preferably, the combined bedstead is a bunk bed including an upper bed and a lower bed. The upper bed and the lower bed are connected by the four support posts. The upper bed and the lower bed each includes the bed beam connected between two of the support posts. The upper bed and the lower bed each includes a guardrail side frame connected to the bed beam or directly connected between two of the support posts. A ladder is provided between the upper bed and the lower bed. The ladder is connected between the bed beam of the upper bed and the bed beam of the lower bed.

Preferably, the ladder includes two vertical rods and a plurality of transverse rods as footsteps. Upper and lower ends of the ladder are provided with outer transverse rods connected to the bed beams of the upper bed and the lower bed. One side of each outer transverse rod, attached to the bed beam, is provided with at least one positioning sheet protruding outward and extending toward one side thereof. The bed beam is provided with a positioning opening corresponding to the positioning sheet of each outer transverse rod for the positioning sheet to be embedded into the positioning opening after being inserted. A surface connected with the ladder of the bed beam is formed with at least one positioning hole. Each outer transverse rod is provided with a positioning boss. When the positioning sheet of each outer transverse rod is positioned in the positioning opening of the bed beam, the positioning boss is ejected upward and positioned in the positioning hole of the outer transverse rod.

With the above structure, when the bedstead of the present invention is assembled and connected, for the connection between the bed beams of the bed frame and the support posts, the connection of the guardrail side frame and the connection of the ladder, the positioning sheet disposed thereon is inserted into the corresponding positioning opening and further positioned by the positioning boss to complete the combined connection. In the assembly process, there is no need to use screws, so that the assembly and disassembly are more convenient, avoiding problems such as time-consuming and labor-intensive assembly and scattered structure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of the overall structure of the present invention (a bunk bed is taken as an embodiment);

FIG. 2 is a schematic view of one side of the bedstead of FIG. 1;

FIG. 2A is a partial enlarged view of the portion A of FIG. 2, showing the assembly operation of the guardrail side frame at both ends of the bed frame;

FIG. 3 is a schematic view of the two sides of the bedstead of FIG. 1 after the upper bed beam is combined;

FIG. 3 A is a partial enlarged view of the portion B of FIG. 3, showing a first embodiment of the assembly operation of the bed beam;

FIG. 3B is a partial enlarged view of the portion B of FIG. 3, showing a second embodiment of the assembly operation of the bed beam;

FIG. 3C is a schematic view showing the positioning boss and the limiting pin of the support post of FIG. 3B in a limited state;

FIG. 3D is a structural schematic view showing the positioning boss and the limiting pin of the support post of FIG. 3B;

FIG. 4 is a schematic view showing the combination of the rear guardrail side frame of the upper bedstead of the bedstead of FIG. 1;

FIG. 4A is a partial enlarged view of the portion C of FIG. 4, showing the assembly operation of the rear guardrail side frame;

FIG. 5 is a schematic view showing the front guardrail side frame and the bed beam mounted to the upper bedstead of the bedstead of FIG. 1;

FIG. 5A and FIG. 5B are partial enlarged views of the portions D and E of FIG. 5 respectively, showing the connecting operation of the front guardrail side frame and both ends of the bed beam;

FIG. 5C, FIG. 5D and FIG. 5E are schematic views of different embodiments of the positioning sheet of FIG. 5 A;

FIG. 6 is a schematic view showing the connection of the ladder of the bedstead of FIG. 1;

FIG. 6Ais a partial enlarged view of the portion F of FIG. 6, showing the operation of the ladder connected to the beam bed of the lower bed;

FIG. 7 is a schematic view showing the combination of the longitudinal poles of the bedstead; and

FIG. 7A is a partial enlarged view of the portion G of FIG. 7, showing the connection of the longitudinal poles.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

As shown in FIG. 1, a screwless connection structure of the present invention is applied to a combined bedstead. A bunk bed having an upper bedstead is taken as an example. The screwless connection structure may be applicable to a single bedstead. As shown in the figures, a combined bunk bed includes an upper bed and a lower bed. The upper bed and the lower bed are connected by four support posts. A lower bed frame 2 of the lower bed and an upper bed frame 3 of the upper bed are connected to the support posts 1, respectively.

The lower bed frame 2 includes two parallel bed beams 21 each connected between the two support posts 1 located at the front and at the rear of the bedstead. A plurality of longitudinal poles 22 are connected between the two bed beams 21 to form a longitudinal support for supporting a bed board or mattress. The combination of the bed beams 21 and the longitudinal poles 22 forms a bed frame. The bed beam 21 may be disposed between the two support posts 1 at each side of the bedstead, or a guardrail side frame 23 may be directly connected between the two support posts 1 as a guardrail side frame for the head and the foot of the bed. In the upper bed, two bed beams 31 are connected between the two support posts 1 at the front and at the rear of the bedstead, respectively. The bed beams 31 are located above the bed beams 21, respectively. A plurality of longitudinal poles 32 are connected between the two bed beams 31. A guardrail side frame 33 above the bed beam 31 is connected between the two support posts 1 at either side of the bedstead as a guardrail side frame for the head and the foot of the bed. In the upper bedstead, the front and the rear of bedstead are provided with guardrail side frames. A guardrail side frame 34 is located above the bed beam 31 and connected between the two support posts 2 at the rear of the bedstead as a guardrail for the rear side of the upper bed. The front of the upper bed is also connected with a guardrail side frame 35. The length of the guardrail side frame 35 is less than the distance between the two support posts 1. An opening is formed at one side of the guardrail side frame 35 for the user to enter the upper bed. A ladder is provided between the upper and lower bed frames for the user to climb to the upper bed. The left side or the right side of the front of the bedstead is provided with a ladder 4. The ladder 4 is connected between the bed beam 31 and the bed beam 21. The guardrail side frame 35 at the front of the upper bed extends from one of the support posts 1 to the ladder 4, leaving a distance on the bed beam 31.

In the present invention, in order to realize the assembly of the bedstead without using screws, as shown in FIGS. 1 to 7, the respective two ends of the bed beams 21, 31 of the lower bed frame 2 of the upper bed frame 3 of the bedstead are directly connected to the support posts 1 in an inserted and embedded manner, without using screws for fixing. For each guardrail side frame, it is only necessary to position the two sides of the guardrail side frame by inserting them into the support posts 1 and positioning them. There is no need to use screws for locking and fixing the ladder 4. The upper and lower ends of the ladder 4 are connected to the upper and lower bed beams 21, 31 in an inserted and embedded manner, thereby realizing the assembly of the bedstead. As shown in FIG. 1, FIG. 2, FIG. 4, FIG. 5 and FIG. 6, each of the guardrail side frames 23, 33, 34, 35 of the bedstead includes two outer horizontal rods 331 and two outer longitudinal rods 332 to form a frame structure. A plurality of middle horizontal rods 333 are arranged in parallel and connected between the two outer horizontal rods 332. At least one middle longitudinal rod 334 is disposed between the two outer longitudinal rods 332 and connected between the two outer horizontal rods 331 and connected with the middle horizontal rods 333. In this way, the frame is stronger. As shown in FIG. 2, the guardrail side frames 33 at two sides of the upper bed as the guardrails for the head or the foot of the bed are taken as an example. The guardrail side frame 33 includes two outer horizontal rods 331 and two outer longitudinal rods 332 to form a side frame. A plurality of middle horizontal rods 333 are arranged in parallel and connected between the two outer horizontal rods 332. The middle of the guardrail side frame is provided with a middle longitudinal rod 334 parallel to the two outer longitudinal rods 332. The middle longitudinal rod 334 is connected between the two outer horizontal rods 331 and connected with the middle horizontal rods 333.

For the combination of the bed frame, as shown in FIG. 3 and FIG. 3A, when the bed beam 21 of the bed frame is to be connected to the support post 1, as shown in the figures, either end of the bed beam 21 is provided with at least one positioning sheet 51 protruding outward and extending toward one side thereof. In this embodiment, two positioning sheets are provided at either end of the bed beam 21. Each positioning sheet 51 protrudes outward from the end face of the bed beam 21 and extends downward, correspondingly, the support post 1 is provided with a positioning opening 11 corresponding to the positioning sheet 51 at the outer side of each bed beam for the positioning sheet 51 to be inserted and embedded therein, so that the bed beam 21 is connected to the support post 1. In order to prevent the positioning sheet 51 that is embedded in the positioning opening 11 in a top-down manner from being moved upward and detached, a positioning boss 12 is provided above the positioning opening 11 and is located above the bed beam 21. After the positioning sheet 51 is positioned, the raised positioning boss 12 is configured to prevent the bed beam 21 from being moved upward and detached after the bed beam 21 is connected to the support post 1, as shown in FIG. 3 A. The positioning boss 12 may be disposed below or at the side of the bed beam 21. After the positioning sheet 51 is inserted, the positioning boss 12 is ejected upward to block one side of the bed beam 21. The positioning boss 12 may be disposed below or at the side of the bed beam 21. After the positioning sheet 51 is inserted, the positioning boss 12 is ejected upward to block the side of the bed beam 21.

As shown in FIG. 3B, a connecting sheet 211 is provided on either end of the bed beam

21. The positioning sheet 51 is disposed at the outer side the connecting sheet 211. The positioning sheet 212 is formed with a positioning hole 212. When the positioning boss 12 is ejected upward, it passes through the positioning hole 212 of the connecting sheet 211 to be positioned, thereby blocking and positioning the bed beam 21.

Furthermore, in order to prevent erroneous operation for the positioning boss 12, for example, a child presses the positioning boss 12 erroneously, one side of the positioning boss 12 is provided with a limiting pin 13. In this embodiment, the support post 1 is a cylindrical tube, and the limiting pin 13 is disposed above or below the positioning boss 12. If the support post 1 is a square tube, the limiting pin 13 may be disposed at the left or right side of the positioning boss 12. As shown in FIG. 3B, FIG. 3C and FIG. 3D, the limiting pin 13 and the positioning boss 12 are disposed on an elastic suspension sheet 14. The elastic suspension sheet 14 is located in the support post 1. The support post 1 is formed with limiting holes 121, 131 corresponding to the positioning boss 12 and the limiting pin 13, respectively. The limiting pin 13 is rotatably connected to the elastic suspension sheet 14. The head of the limiting pin 13 is elliptical, and the limiting hole 131 is an elliptical hole. The elliptical head of the limiting pin 13 is limited at the outer side of the limiting hole 131 of the support post 1 after being rotated. The positioning boss 12 and the limiting pin 13 on the same elastic suspension sheet 14 are limited in a state of being ejected upward and cannot be pressed, thereby preventing the positioning boss 12 from being pressed erroneously. Of course, the positioning boss on the support post may be in the form of a limiting pin. The support post is formed with an elliptical limiting hole corresponding to the positioning boss. The head of the positioning boss has an elliptical shape. The positioning boss is rotatably connected to an elastic suspension sheet. The positioning boss is limited at the outer side of the limiting hole of the support post and cannot be pressed after being rotated, thereby preventing the positioning boss from being pressed erroneously.

Similarly, as shown in FIG. 2A, FIG. 4A and FIG. 5 A, when each guardrail side frame is to be connected to the support post 1, as shown in FIG. 5 A, such as the guardrail side frame 35 at the front of the upper bed, the outer side face of the outer longitudinal rod 352 of the guardrail side frame 35 is provided with at least one positioning sheet 51 that protrudes outward and extends toward one side. The positioning sheet 51 protrudes outward from the outer side face of the outer longitudinal rod 352 to extend upward, downward, leftward or rightward, as shown in FIG. 5C, FIG. 5D, and FIG. 5E. In this embodiment, two positioning sheets 51 are disposed at the end of the bed beam, and the positioning sheets 51 extend downward. Correspondingly, the support post 1 is provided with a positioning opening 11 corresponding to the positioning sheet 51 at the outer side of each guardrail side frame for the positioning sheet 51 to be inserted and embedded therein, so that the guardrail side frame 35 is connected to the support post 1. In order to prevent the positioning sheet 51 embedded in the positioning opening 11 from being moved and detached to move the guardrail side frame, the outer longitudinal rod of the guardrail side frame is formed with at least one positioning hole 61, and the support post is provided with a positioning boss 12 corresponding to the positioning hole. The positioning boss may be in the form of a limiting pin. The positioning boss 12 is rotatably connected to an elastic suspension sheet. The head of the positioning boss has an elliptical shape, and the positioning hole 61 is an elliptical hole, thereby preventing the positioning boss 12 from being pressed erroneously. When the positioning sheet 51 of the outer longitudinal rod of the guardrail side frame is positioned in the positioning opening 11 of the corresponding support post, the positioning hole of the outer longitudinal rod is just located at the outer side of the positioning boss 12 to position the positioning boss 12 after being ejected upward. The raised positioning boss 12 blocks the guardrail side frame from being moved upward and detached after the guardrail side frame is connected to the support post 1. Each guardrail side frame can be connected in this way and will not be described in detail hereinafter.

For the connection of the ladder 4, the above-mentioned connecting way is adopted. As shown in FIG. 6 and FIG. 6A, the ladder 4 is also a frame, including two vertical rods 41 and a plurality of transverse rods 42 as footsteps. The upper and lower ends of the ladder 4 are provided with outer transverse rods 43 connected to the bed beams 21, 31 of the bed frame. The outer transverse rods 43 are located at the ends of the two vertical rods 41, respectively. One side of the outer transverse rod 43, attached to the bed beam 21 of the bed frame, is provided with at least one positioning sheet 51 protruding outward and extending toward one side thereof. In this embodiment, two positioning sheets 51 extending downward are provided. Correspondingly, one side of each of the bed beams 21, 31, connected with the outer transverse rod 43, is provided with a positioning opening 11 corresponding to the positioning sheet 51 at the outer side of the outer transverse rod 43 for the positioning sheet 51 to pass through and be inserted therein, so that the ladder 4 is connected to the support post 1, as shown in FIG. 6A. In order to prevent the positioning sheet 51 embedded into the positioning opening 11 from being moving reversely and detached to move the ladder 4, the upper plane connected with the ladder of the bed beam 21 and the lower plane connected with the ladder of the bed beam 31 are respectively formed with at least one positioning hole 61, and the outer transverse rod 43 is provided with a positioning boss 12 corresponding to the positioning hole 61. Similarly, the positioning boss may be in the form of a limiting pin that can prevent an erroneous operation, and will not be described in detail hereinafter. When the positioning sheet 51 at the top or bottom of the ladder is positioned in the positioning opening 11 of the corresponding bed beam, the positioning hole of the bed beam of the bed frame is just located at the outer side of the positioning boss 12 to position the positioning boss 12 after being ejected upward. The raised positioning boss 12 can prevent the ladder 4 connected between the upper and lower bed beams of the upper and lower bed frames from being moved left and right.

When the bedstead of the present invention needs to be combined, as shown in FIG. 2 to FIG. 7, the guardrail side frames 23, 33 as the guardrails for the head and the foot of the bed are first connected between the two support posts 1 to form the sides of the bedstead. The positioning sheet 51 at the outer side of the guardrail side frame is positioned into the corresponding positioning opening of the support post, and the positioning boss 12 is further positioned after being ejected upward. The bed beams 21, 31 of the bed frame are then io connected between the two support posts 1, respectively. Then, one side of each guardrail side frame of the upper bed is mounted and positioned on the support post 1, and the ladder 4 is connected to the upper and lower bed frames. The ladder 4 is connected between the bed beams 31, 21. Finally, the longitudinal poles 22, 32 of the bed frame are connected to complete the assembly. As shown in FIG. 7 and FIG. 7A, the longitudinal poles 32 of the upper bed is taken as an example. Either end of each longitudinal pole is pressed into a sheet-shaped engaging head 321. A lower side edge of the engaging head 321 is formed with an engaging groove 322. An inner side of the bed beam 31 is formed with a plurality of T-shaped slots 311 that are evenly arranged in a longitudinal direction. The engaging groove 322 of each engaging head 321 is engaged in a notch in the middle of the corresponding T-shaped slot 311, so that the longitudinal poles 32 are arranged between the bed beams and are not easy to rotate or move, and the assembly of the longitudinal poles 32 of the bed frame is realized. On the contrary, when the bedstead of the present invention is disassembled, the guardrail side frames are removed from the support posts 1, the positioning boss 12 is pressed to release the positioning, and the positioning sheet 51 positioned in the positioning opening 11 is pulled out. The disassembly of the ladder 4 is done in the same manner, and then the bed frame is disassembled. The longitudinal poles are taken out, and the bed beams 21, 31 are separated to complete the disassembly. There is no need to loosen the screws during the disassembly. The operation is simple and quick.

In the screwless connection structure of the combined bedstead provided by the present invention, when the bedstead is assembled and connected, for the connection between the bed beams of the bed frame and the support posts, the connection of the guardrail side frame and the connection of the ladder, the positioning sheet disposed thereon is inserted into the corresponding positioning opening and further positioned by the positioning boss to complete the combined connection. In the assembly process, there is no need to use screws, so that the assembly and disassembly are more convenient, avoiding problems such as time-consuming and labor-intensive assembly and scattered structure.

Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.

Claims

WHAT IS CLAIMED IS:

1. A screwless connection structure of a combined bedstead, the bedstead comprising four support posts, a bed beam being connected between two of the support posts, characterized in that: either end face of the bed beam is provided with at least one positioning sheet protruding outward and extending toward one side thereof, each support post is provided with a positioning opening corresponding to the positioning sheet on the end face of the bed beam, the positioning sheet is embedded into the positioning opening after being inserted, each support post is provided with a positioning boss, after the positioning sheet is inserted, the positioning boss is ejected upward to block one side of the bed beam.

2. The screwless connection structure of the combined bedstead as claimed in claim 1, wherein the positioning sheet protrudes outward from the end face of the bed beam and extends downward, and the positioning boss is located above or below the bed beam.

3. The screwless connection structure of the combined bedstead as claimed in claim 1, wherein either end face of the bed beam is provided with a connecting sheet, the positioning sheet is disposed on an outer side of the connecting sheet, the connecting sheet is provided with a positioning hole, and the positioning boss is inserted and positioned in the positioning hole when the positioning bass is ejected upward.

4. The screwless connection structure of the combined bedstead as claimed in claim 1, wherein one side of the positioning boss is provided with a limiting pin, the limiting pin and the positioning boss are disposed on an elastic suspension sheet, each support post is formed with limiting holes respectively corresponding to the positioning boss and the limiting pin, the limiting pin is rotatably connected to the elastic suspension sheet, the limiting pin is limited at an outer side of a corresponding one of the limiting holes after being rotated, and the positioning boss is limited in a state of being ejected upward when the limiting pin is limited.

5. The screwless connection structure of the combined bedstead as claimed in claim 1, wherein each support post is formed with a limiting hole corresponding to the positioning boss, the positioning boss is rotatably connected to an elastic suspension sheet, and the positioning boss is limited at an outer side of the limiting hole of the support post and in a state of being unable to be pressed.

6. The screwless connection structure of the combined bedstead as claimed in claim 1, wherein a guardrail side frame is provided between two of the support posts, the guardrail side frame is connected to the bed beam or directly connected between two of the support posts; the guardrail side frame includes two outer horizontal rods and two outer longitudinal rods to form a side frame, an outer side face of each outer longitudinal rod is provided with a positioning sheet protruding outward and extending toward one side thereof, each support post is provided with a positioning opening corresponding to the positioning sheet of the guardrail side frame, each outer longitudinal rod is provided with at least one positioning hole corresponding to the positioning boss of each support post, and the positioning boss is ejected upward and positioned in the positioning hole of the outer longitudinal rod when the positioning sheet of the outer longitudinal rod is inserted and positioned.

7. The screwless connection structure of the combined bedstead as claimed in claim 6, wherein the positioning sheet protrudes outward from the outer side face of the outer longitudinal rod to extend upward, downward, leftward or rightward.

8. The screwless connection structure of the combined bedstead as claimed in claim 1, wherein a plurality of longitudinal poles are provided between two bed beams, either end of each longitudinal pole is pressed into a sheet-shaped engaging head, a lower side edge of the engaging head is formed with an engaging groove, an inner side of each bed beam is formed with a plurality of T-shaped slots that are evenly arranged in a longitudinal direction, and the engaging groove of each engaging head is engaged in a notch in the middle of a corresponding one of the T-shaped slots.

9. The screwless connection structure of the combined bedstead as claimed in claim 1, wherein the combined bedstead is a bunk bed including an upper bed and a lower bed, the upper bed and the lower bed are connected by the four support posts, the upper bed and the lower bed each includes the bed beam connected between two of the support posts, the upper bed and the lower bed each includes a guardrail side frame connected to the bed beam or directly connected between two of the support posts, a ladder is provided between the upper bed and the lower bed, and the ladder is connected between the bed beam of the upper bed and the bed beam of the lower bed.

10. The screwless connection structure of the combined bedstead as claimed in claim 9, wherein the ladder includes two vertical rods and a plurality of transverse rods as footsteps, upper and lower ends of the ladder are provided with outer transverse rods connected to the bed beams of the upper bed and the lower bed, one side of each outer transverse rod, attached to the bed beam, is provided with at least one positioning sheet protruding outward and extending toward one side thereof, the bed beam is provided with a positioning opening corresponding to the positioning sheet of each outer transverse rod for the positioning sheet to be embedded into the positioning opening after being inserted, a surface connected with the 5 ladder of the bed beam is formed with at least one positioning hole, each outer transverse rod is provided with a positioning boss, when the positioning sheet of each outer transverse rod is positioned in the positioning opening of the bed beam, the positioning boss is ejected upward and positioned in the positioning hole of the outer transverse rod.