CN220748744U - Pipe fitting connection structure and bedstead - Google Patents

Abstract

The utility model discloses a pipe fitting connecting structure and a bedstead, wherein the pipe fitting connecting structure is used for connecting and fixing a first pipe fitting and a second pipe fitting, an inserting groove for inserting the second pipe fitting is formed in the first pipe fitting, and the pipe fitting connecting structure further comprises a filling piece; when the second pipe fitting is inserted into the insertion groove along one of the tail ends of the second pipe fitting in the axial direction of the second pipe fitting, the insertion groove is provided with a notch allowance space for the second pipe fitting to freely move in the insertion groove, and the filling piece is inserted into the insertion groove and fills the notch allowance space; so that the first pipe fitting and the second pipe fitting are fixedly connected. According to the utility model, the insertion groove for inserting the other pipe fitting is formed in one pipe fitting, and the filling piece is arranged to fill the allowance space of the other pipe fitting after being inserted in the insertion groove, so that the two pipe fittings can form stable connection through two steps of insertion and filling, and the trouble of installing multiple screws is avoided; the connection stability and the installation convenience between the pipe fittings are effectively improved.

Description

Pipe fitting connection structure and bedstead

Technical Field

The utility model belongs to the technical field of pipe fitting connection, and particularly relates to a pipe fitting connection structure and a bedstead.

Background

Pipe fittings are one of the more common structural members in the mechanical field, and are mostly used as basic parts and are spliced and assembled to form other mechanical structures.

The existing bed is mostly composed of a bed frame used as a support and a bed board or a mattress laid on the bed frame, the whole size of the bed frame is large, and the bed frame is mostly assembled and fixed by a plurality of structural members for convenient storage and transportation. If constitute the bedstead after being fixed through a plurality of pipe fittings interconnect, wherein the pipe fitting is fixed with the screw that adopts more in connection between the pipe fitting, and structural stability and the durability of this kind of connected mode depend on the screw life, and along with the long accumulation of using, stress interaction between each pipe fitting, the screw can become flexible or warp gradually, and then influences connection stability. In addition, the installation mode of connecting and fixing each structural member through the screw is also comparatively complicated, and the user needs to adopt the screwdriver to assemble a plurality of positions to because the screw piece is small, it has the defect that is difficult to get and put and lose easily.

Therefore, there is a need to propose a pipe connection scheme with better connection stability and installation convenience.

Disclosure of Invention

The present utility model aims to at least partially solve the technical problems existing in the prior art. Therefore, the utility model provides the pipe fitting connecting structure, which can be used for connecting and fixing the pipe fittings and effectively improving the connection stability and the installation convenience between the pipe fittings.

The utility model adopts the following technical scheme to achieve the aim of the utility model:

in a first aspect, the present utility model provides a pipe connection structure, where the pipe connection structure is used for connecting and fixing a first pipe and a second pipe, the first pipe is provided with an insertion groove for inserting the second pipe, and the pipe connection structure further includes a filling member for filling a gap allowance space of the insertion groove;

when one tail end of the second pipe fitting along the axial direction is inserted into the insertion groove, the insertion groove is provided with a notch allowance space for the second pipe fitting to freely move in the insertion groove, and the filling piece is inserted into the insertion groove and fills the notch allowance space; so that the first pipe fitting and the second pipe fitting are fixedly connected.

Preferably, a clamping and embedding part is arranged near the tail end of the second pipe fitting along the axial direction of the second pipe fitting;

when the second pipe fitting is inserted into the insertion groove, the clamping part can be clamped in the notch of the insertion groove, so that the second pipe fitting is fixed on the first pipe fitting in an axially fixed mode and without relative rotation.

Preferably, the clamping and embedding part is provided with a contact end abutting against the notch edge of the inserting groove and an opening end formed by extending the contact end towards the radial direction of the second pipe fitting, and the opening distance from the opening end to the contact end is gradually reduced.

Preferably, the filling piece comprises a first elastic piece and a second elastic piece;

the first elastic piece and the second elastic piece are respectively provided with a connecting end and a free end, and the first elastic piece and the second elastic piece are fixedly connected through the connecting ends, so that an included angle smaller than 180 degrees is formed between the first elastic piece and the second elastic piece; the free end of the first elastic piece and the free end of the second elastic piece after connection can be mutually close to or mutually far away under the action of external force.

Preferably, the filling piece further comprises a limiting part, and the limiting part is arranged at one side of the free end, facing the inserting groove; when the filling piece is inserted into the insertion groove, the limiting parts on the first elastic piece and the second elastic piece are simultaneously abutted against the first pipe fitting.

Preferably, the limiting part comprises a first limiting block arranged at the end part of the opening end and a second limiting block arranged at one side of the first limiting block close to the connecting end, and a spacing part for clamping and embedding the slot edge of the inserting slot is arranged between the first limiting block and the second limiting block.

Preferably, the filler is an integrally formed structure.

In a second aspect, the present utility model further provides a bed frame, including a support frame body and a plurality of cross beams, where the support frame body and the plurality of cross beams are connected and fixed by adopting the pipe connection structure according to the first aspect;

the support frame body comprises at least four upright posts and two first pipe fittings, the head and the tail of the two first pipe fittings are connected with the two upright posts respectively and are oppositely arranged, the plurality of cross beams are all arranged to be the second pipe fittings, the two ends of the second pipe fittings are respectively inserted and fixed on the two first pipe fittings, and the plurality of second pipe fittings are fixedly connected with the first pipe fittings.

Preferably, the support frame body further comprises a middle support piece and two connecting pieces, wherein the middle support piece is arranged between the two first pipe fittings and is fixedly connected with the two first pipe fittings through the two connecting pieces respectively.

Preferably, the connecting piece comprises a first connecting part fixedly connected with the first pipe fitting and a second connecting part fixedly connected with the middle supporting piece;

the first connecting part is provided with a bearing sheet for bearing the first pipe fitting and a fixing sheet which extends along one side edge of the bearing sheet and is perpendicular to the bearing sheet; the second connecting part is provided with a mounting sheet fixedly connected with the edge of the other side of the bearing sheet and two limiting sheets which extend along the two edges of the mounting sheet and are oppositely arranged.

Compared with the prior art, the utility model has the beneficial effects that:

according to the pipe fitting connecting structure, the insertion groove for inserting the other pipe fitting is formed in one pipe fitting, and the filling piece is arranged to fill the allowance space of the other pipe fitting after being inserted in the insertion groove, so that the two pipe fittings can be firmly connected through two steps of insertion and filling, and the trouble of installing multiple screws is avoided; the connection stability and the installation convenience between the pipe fittings are effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a pipe connection structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a pipe connection structure according to an embodiment of the present utility model in an exploded state;

FIG. 3 is a schematic structural view of a filling member according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of one of the angles of the pipe connection structure in a connected state according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a pipe connection structure according to another embodiment of the present utility model;

FIG. 6 is a schematic view showing the overall structure of a bed frame according to an embodiment of the present utility model;

FIG. 7 is a schematic view showing an exploded view of a bed frame according to an embodiment of the present utility model;

FIG. 8 is an enlarged view of a portion of FIG. 6 at C;

FIG. 9 is a partial enlarged view at B in FIG. 6;

fig. 10 is a schematic structural view of a connector according to an embodiment of the utility model.

Reference numerals illustrate:

100. a pipe fitting connection structure; 10. a first pipe fitting; 20. a second pipe fitting; 101. a plug-in groove; 30. a filler; 201. a clamping and embedding part; 2011. a contact end; 2012. an open end; 301. a first elastic sheet; 302. a second spring plate; 300. a connection end; 400. a free end; 303. a limit part; 3031. a first limiting block; 3032. a second limiting block; 3033. a spacer; 500. a bed frame; 50. a support frame body; 501. a column; 502. a middle support; 503. a connecting piece; 5031. a first connection portion; 5032. a second connecting portion; 311. a support sheet; 312. a fixing piece; 321. a mounting piece; 322. and a limiting piece.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the related art, the pipe fittings are connected and fixed in a sleeve sleeving or mutually embedded mode, but the mode is suitable for axial connection of the pipe fittings, and when two pipe fittings are required to be fixed in a vertical connection mode, a hole slot matched with the tail end of one pipe fitting is formed in one pipe fitting, the other pipe fitting is directly inserted into the hole slot, the installation mode has higher production precision requirements on the pipe fittings and the hole slot, otherwise, the difference between the sizes of the hole slot and the tail end of the pipe fitting is larger, and the problem that the pipe fittings cannot be inserted or become too loose after being inserted occurs is easily caused. Further, if the screw is used for reinforcing the steel plate, the defect that scattered parts are too many and the installation is complicated exists.

Based on the above-mentioned problems of the prior art, the present utility model proposes a solution applicable to vertical connections between pipes, so as to solve the above-mentioned problems at least partially.

Referring to fig. 1-5, the present embodiment provides a pipe connecting structure 100, where the pipe connecting structure 100 is used for connecting and fixing a first pipe 10 and a second pipe 20, and the first pipe 10 and the second pipe 20 may refer to any two pipe structures to be connected; the first pipe fitting 10 is provided with an inserting groove 101 for inserting the second pipe fitting 20, and the notch of the inserting groove 101 is larger than the two tail ends of the second pipe fitting 20 along the axial direction, so that the second pipe fitting 20 can be inserted into the inserting groove 101.

The pipe connection structure 100 further includes a filling member 30 for filling the allowance space of the slot opening of the insertion groove 101; when one of the ends of the second pipe 20 in the axial direction thereof is inserted into the insertion groove 101, the insertion groove 101 has a notch allowance space in which the second pipe 20 can freely move in the insertion groove 101, and the filler 30 is inserted into the insertion groove 101 and fills the notch allowance space; so that the first pipe member 10 and the second pipe member 20 are fixedly connected. As shown in fig. 1, when the second pipe fitting 20 and the filling member 30 are both inserted and fixed in the insertion groove 101, the filling member 30 abuts against the first pipe fitting 10 and the second pipe fitting 20, so that a stable connection is formed between the first pipe fitting 10 and the second pipe fitting 20. The arrangement of the filling member 30 reduces the production pressure to a certain extent, so that the sizes of the inserting groove 101 and the pipe fitting can tolerate larger precision errors in production, that is, the sizes of the end parts of the inserting groove 101 and the pipe fitting do not need to be excessively close, the space between the inserting groove 101 and the pipe fitting can be filled by the filling member 30, and the effect of stable connection can be achieved after the filling.

The size difference between the tail ends of the inserting groove 101 and the second pipe fitting 20 is adjusted, and the filling piece 30 is arranged to fill the allowance space of the second pipe fitting 20 after being inserted, so that the two pipe fittings can be firmly connected only through two steps of inserting and filling, and the trouble of installing multiple screws is avoided; the connection stability and the installation convenience between the pipe fittings are effectively improved.

Referring to fig. 1-2, a clamping portion 201 is preferably provided near the end of the second pipe 20 along the axial direction thereof; when the second pipe 20 is inserted into the insertion groove 101, the clamping portion 201 can be clamped into the notch of the insertion groove 101, so that the second pipe 20 is fixed on the first pipe 10 in an axially fixed manner and without relative rotation. Specifically, the first pipe fitting 10 is set to be a square hollow pipe, the insertion groove 101 is formed in one side surface of the first pipe fitting 10, the end part of the second pipe fitting 20 is inserted into the insertion groove 101 during insertion, the clamping portion 201 of the second pipe fitting 20 is clamped at the notch of the insertion groove 101, and at this time, due to the opening of the clamping portion 201, when the second pipe fitting 20 is clamped at the insertion groove 101, the distance between the upper end part of the second pipe fitting 20 opposite to the clamping portion 201 and the upper edge of the notch of the insertion groove 101 is increased. Based on this, the size of the insertion groove 101 may be set to be slightly larger than the end size of the second pipe 20, that is, the insertion groove 101 only needs to be slightly larger than the end of the second pipe 20, so that the end of the second pipe 20 may pass through the insertion groove 101 and then be clamped and fixed on the insertion groove 101 by the clamping portion 201 of the second pipe 20, and further, a gap, that is, a margin space, may be formed between the upper end of the second pipe 20 opposite to the clamping portion 201 and the upper edge of the notch of the insertion groove 101, and then the margin space may be filled by the filling member 30.

The second pipe fitting 20 and the first pipe fitting 10 can form fixed connection in the axial direction through the clamping and embedding part 201, so that the axial movement of the second pipe fitting 20 is avoided, and the connection strength of the first pipe fitting 10 and the second pipe fitting 20 is further improved. And because of the arrangement of the clamping and embedding part 201, the size of the inserting groove 101 can be reduced to a range close to the outer edge of the end part of the second pipe fitting 20, so that the influence on the integral strength of the pipe fitting caused by overlarge notch or the phenomenon that more dirt enters the pipe fitting caused by overlarge notch is avoided.

It can be appreciated that, as known from the above-mentioned principles of connection and engagement of the insertion groove 101, the filler 30, and the caliper portion, the pipe connection structure 100 provided in the present application can be used for vertical connection of two pipes, and axial connection of two pipes. When the pipe fitting is used for axial connection of two pipe fittings, the insertion groove 101 can be arranged at the axial end part of one pipe fitting, namely, the pipe fitting is arranged as a pipe fitting with two ends sealed by the sealing panels and hollow inside, the insertion groove 101 is arranged at the sealing panels at the two ends, and the other pipe fitting is inserted into the insertion groove 101 through the end part and filled and fixed by adopting the filling piece 30.

Referring to fig. 2 and 4, preferably, the clamping portion 201 has a contact end 2011 abutting against a notch edge of the insertion groove 101 and an open end 2012 formed by extending the contact end 2011 toward the radial direction of the second pipe 20, and an opening distance from the open end 2012 to the contact end 2011 is gradually reduced, which is beneficial to the smooth clamping of the second pipe 20 on the insertion groove 101, and two opposite inclined structures formed between the open end 2012 and the contact end 2011 can be offset by abutting against a groove wall of the insertion groove 101 when the second pipe 20 encounters an axial force, so as to improve the stability of the second pipe 20 in the axial direction thereof.

Referring to fig. 3, preferably, the filling member 30 includes a first elastic sheet 301 and a second elastic sheet 302; the first elastic piece 301 and the second elastic piece 302 are respectively provided with a connecting end 300 and a free end 400, and the first elastic piece 301 and the second elastic piece 302 are fixedly connected through the connecting end 300, so that an included angle smaller than 180 degrees is formed between the first elastic piece 301 and the second elastic piece 302; the free ends 400 of the first elastic piece 301 and the second elastic piece 302 after being connected can be close to each other or far away from each other under the action of external force.

When the filler 30 is filled into the allowance space between the second pipe fitting 20 and the insertion groove 101, an opposing force can be applied to the free ends 400 of the first elastic piece 301 and the second elastic piece 302, even if the first elastic piece 301 approaches the second elastic piece 302 and is inserted into the allowance space, the applied force is removed, and after the first elastic piece 301 and the second elastic piece 302 are reset, the abutting action is formed on the notch outer edges of the insertion groove 101, and meanwhile, the other two side edges of the first elastic piece 301 and the second elastic piece 302 are also abutted on the other outer edge of the notch of the insertion groove 101 and the upper end surface of the second pipe fitting 20. Optionally, an included angle between the first elastic piece 301 and the second elastic piece 302 is an acute angle.

Referring to fig. 3-5, preferably, the filling member 30 further includes a limiting portion 303, the limiting portion 303 is disposed on a side of the free end 400 facing the inserting groove 101, that is, the limiting portion 303 of the first elastic piece 301 is disposed on a side of the free end 400 of the first elastic piece 301 facing away from the free end 400 of the second elastic piece 302, and the limiting portions 303 of the first elastic piece 301 and the second elastic piece 302 are respectively formed by extending outwards from the ends of the respective free ends 400 and are in a flared shape; when the filling member 30 is inserted into the insertion groove 101, the limiting portions 303 on the first elastic sheet 301 and the second elastic sheet 302 are simultaneously abutted against the first pipe fitting 10, and the limiting portions 303 are located outside the insertion groove 101 and used for limiting the depth of the filling member 30 entering the insertion groove 101, so that the filling member 30 is prevented from completely entering the insertion groove 101 and cannot be taken out.

Referring to fig. 3 to 5, the limiting portion 303 preferably includes a first limiting block 3031 disposed at an end of the opening end 2012 and a second limiting block 3032 disposed at a side of the first limiting block 3031 near the connection end 300, and a spacing portion 3033 for the slot edge of the insertion slot 101 to be clamped and embedded is disposed between the first limiting block 3031 and the second limiting block 3032. When the filler 30 is assembled with the first pipe fitting 10 and the second pipe fitting 20, the first stopper 3031 and the second stopper 3032 are respectively located at the inner side and the outer side of the insertion groove 101, and the groove edge of the insertion groove 101 abuts against the spacer 3033. The distance between the second limiting block 3032 on the first elastic sheet 301 and the outer end of the second limiting block 3032 on the second elastic sheet 302 is smaller than the distance between the first limiting block 3031 of the first elastic sheet 301 and the outer end of the first limiting block 3031 on the second elastic sheet 302, that is, the second limiting block 3032 is smaller than the first limiting block 3031, so that the filler 30 can be conveniently inserted into or pulled out of the insertion slot 101.

The limiting portion 303 further ensures the connection stability of the filler 30 and the first pipe fitting 10, and at the same time, improves the connection stability between the first pipe fitting 10 and the second pipe fitting 20.

As shown in fig. 3, the filling member 30 is preferably an integrally formed structure, which may be made of a metallic material having a good elasticity. As can be seen from the above description, the filling member 30 is pulled out of the insertion groove 101, and the second pipe fitting 20 is removed, so that the two pipe fittings can be disassembled, the disassembly steps are fewer, the disassembly mode is simple, and the user can place or transport the disassembled pipe fittings after disassembly.

Example 2: referring to fig. 6-7, the present application further provides a bed frame 500, which includes a supporting frame 50 and a plurality of cross beams, wherein the supporting frame 50 and the plurality of cross beams are connected and fixed by using the pipe connection structure 100 as described in embodiment 1; the supporting frame 50 includes at least four columns 501 and two first tubes 10 with ends connected to the two columns 501 and disposed opposite to each other, the plurality of cross beams are all configured as second tubes 20, and two ends of the plurality of second tubes 20 are respectively fixed on the two first tubes 10 in a plugging manner, so that the plurality of second tubes 20 are fixedly connected to the first tubes 10.

As shown in fig. 6 to 7, a plurality of first tubes 10 may be disposed, in this embodiment, the tubes on the left and right sides of the drawing in the drawing are referred to as the portions forming the outer side frames in the bed frame 500, while the second tubes 20 are transversely disposed between the first tubes 10 on the opposite sides to form the beam portions of the bed frame 500, and the left and right ends of the second tubes 20 are respectively connected and fixed with the first tubes 10 through the tube connecting structures 100 described in embodiment 1, i.e. the first tubes 10 are simultaneously provided with the inserting grooves 101 corresponding to the number of the beams, and a plurality of beams are inserted into the inserting grooves 101 one by one and are filled and fixed through the filling members 30 which are matched one by one. Four upright posts 501 are respectively positioned at four corners of the bed frame 500 to form four supporting feet of the bed frame 500.

As shown in fig. 6 to 7, preferably, in order to improve convenience in transportation and storage, the first pipe 10 may be provided as a pipe having a shorter size, and left and right side frames of the bedframe 500 may be formed by connecting a plurality of the first pipe 10; correspondingly, the supporting frame 50 further comprises a middle supporting member 502 and two connecting members 503, wherein the middle supporting member 502 is disposed between the two first pipe fittings 10 and is fixedly connected with the two sets of first pipe fittings 10 disposed oppositely through the two connecting members 503.

Preferably, the connection member 503 includes a first connection portion 5031 for fixedly connecting with the first pipe member 10 and a second connection portion 5032 for fixedly connecting with the middle support 502; the first connecting portion 5031 is provided with a supporting plate 311 for supporting the first pipe fitting 10 and a fixing plate 312 extending along an edge of one side of the supporting plate 311 and perpendicular to the supporting plate 311; screw holes can be correspondingly formed on the fixing piece 312 and the first pipe fitting 10, and the first pipe fitting 10 and the fixing piece 312 can be fixed through screws. The second connecting portion 5032 is provided with a mounting plate 321 fixedly connected with the edge of the other side of the bearing plate 311 and two limiting plates 322 extending along two edges of the mounting plate 321 and oppositely arranged, and the middle supporting piece 502 is embedded between the two limiting plates 322 and abuts against the mounting plate 321, so that the mounting plate 321 and the middle supporting piece 502 can be fixed through screws. The arrangement of the middle support 502 and the connection member 503 further improves the connection stability of the bed frame 500.

The bedstead that this application provided installs and dismantles the step less, and joint strength is high, has effectively solved the problem that bedstead installation is loaded down with trivial details, scattered spare is too much, dismantle inconvenient among the prior art.

In addition, it should be noted that the description of "first", "second", etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The foregoing description of the embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or as applied directly or indirectly to other related technical fields.

Claims (10)

1. A pipe fitting connection structure, pipe fitting connection structure is used for connecting fixed, its characterized in that with first pipe fitting and second pipe fitting: the first pipe fitting is provided with an inserting groove for inserting the second pipe fitting, and the pipe fitting connecting structure further comprises a filling piece for filling the allowance space of the notch of the inserting groove;

when one tail end of the second pipe fitting along the axial direction is inserted into the insertion groove, the insertion groove is provided with a notch allowance space for the second pipe fitting to freely move in the insertion groove, and the filling piece is inserted into the insertion groove and fills the notch allowance space; so that the first pipe fitting and the second pipe fitting are fixedly connected.

2. The pipe connecting structure according to claim 1, wherein a catching portion is provided near an end of the second pipe in the axial direction thereof;

when the second pipe fitting is inserted into the insertion groove, the clamping part can be clamped in the notch of the insertion groove, so that the second pipe fitting is fixed on the first pipe fitting in an axially fixed mode and without relative rotation.

3. A pipe connection structure according to claim 2, wherein the click-on portion has a contact end abutting against the edge of the slot opening of the insertion slot and an open end formed by extending the contact end in a radial direction of the second pipe, and an opening distance from the open end to the contact end is gradually reduced.

4. A tubular connection according to claim 3, wherein the filler comprises a first spring and a second spring;

the first elastic piece and the second elastic piece are respectively provided with a connecting end and a free end, and the first elastic piece and the second elastic piece are fixedly connected through the connecting ends, so that an included angle smaller than 180 degrees is formed between the first elastic piece and the second elastic piece; the free end of the first elastic piece and the free end of the second elastic piece after connection can be mutually close to or mutually far away under the action of external force.

5. The pipe fitting connection structure according to claim 4, wherein the filler further comprises a stopper portion provided on a side of the free end facing the insertion groove; when the filling piece is inserted into the insertion groove, the limiting parts on the first elastic piece and the second elastic piece are simultaneously abutted against the first pipe fitting.

6. The pipe fitting connecting structure according to claim 5, wherein the limiting portion comprises a first limiting block disposed at an end portion of the open end and a second limiting block disposed at a side of the first limiting block near the connecting end, and a spacing portion for the groove edge of the inserting groove to be clamped and embedded is disposed between the first limiting block and the second limiting block.

7. A tubular connection according to claim 6, wherein the filler member is an integrally formed structure.

8. A bed frame, comprising a supporting frame body and a plurality of cross beams, wherein the supporting frame body and the plurality of cross beams are fixedly connected by adopting the pipe fitting connecting structure as set forth in any one of claims 1 to 7;

the support frame body comprises at least four upright posts and two first pipe fittings, the head and the tail of the two first pipe fittings are connected with the two upright posts respectively and are oppositely arranged, the plurality of cross beams are all arranged to be the second pipe fittings, the two ends of the second pipe fittings are respectively inserted and fixed on the two first pipe fittings, and the plurality of second pipe fittings are fixedly connected with the first pipe fittings.

9. The bed frame according to claim 8, wherein the support frame body further comprises a middle support member and two connecting members, the middle support member being disposed between the two first pipe members and fixedly connected to the two first pipe members through the two connecting members, respectively.

10. The bed frame of claim 9, wherein the connection member includes a first connection portion for fixedly connecting with the first tube member and a second connection portion for fixedly connecting with the middle support member;

the first connecting part is provided with a bearing sheet for bearing the first pipe fitting and a fixing sheet which extends along one side edge of the bearing sheet and is perpendicular to the bearing sheet; the second connecting part is provided with a mounting sheet fixedly connected with the edge of the other side of the bearing sheet and two limiting sheets which extend along the two edges of the mounting sheet and are oppositely arranged.