Pipe fitting connecting mechanism and display support

Abstract

The utility model provides a pipe fitting connecting mechanism and a display support, and belongs to the technical field of supports, the pipe fitting connecting mechanism comprises a first pipe fitting and a second pipe fitting; one end of the first connecting piece is fixedly connected with the first pipe fitting; one end of the second connecting piece is fixedly connected with the second pipe fitting, and the other end of the second connecting piece is inserted and matched with the other end of the first connecting piece to limit relative rotation between the first pipe fitting and the second pipe fitting; and the connecting sleeve is located between the first connecting piece and the second connecting piece, one end of the connecting sleeve is in threaded connection with the first connecting piece, and the other end of the connecting sleeve is rotationally connected with the second connecting piece. According to the utility model, the first connecting piece and the second connecting piece are matched in an inserting manner, so that the relative positions of the two adjacent pipe fittings are fixed, and the relative circumferential positions of the two adjacent pipe fittings are expected positions after the two adjacent pipe fittings are connected; and the connection between the two adjacent pipe fittings is locked through the connecting sleeve, so that the stability and the reliability of the product during use are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of brackets, and relates to a pipe fitting connecting mechanism, in particular to a display bracket with a pipe fitting connecting mechanism. Background Art

[0002] At present, products such as display brackets all have columns with relatively long dimensions. In order to reduce the packaging volume, during the structural design, it is necessary to design the relatively long columns to be composed of multiple pipes with relatively short dimensions, and the connection between adjacent two pipes is generally a threaded connection. However, there are the following two problems with threaded connections:

[0003] First, the threaded connection between adjacent two pipes must be screwed to the end. Otherwise, there will be a gap between adjacent two pipes, and there will be a large shake during use, resulting in the instability of the entire display bracket during use. When there are requirements for the relative position between adjacent two pipes and such a connection method is adopted, the circumferential positioning between adjacent two pipes cannot be ensured;

[0004] Second, since adjacent two pipes are connected by threads, it is very easy to become loose due to external rotation during use, and a loosening prevention structure needs to be designed. Summary of the Utility Model

[0005] The purpose of the utility model is to address the above problems existing in the prior art, and propose a pipe fitting connecting mechanism that can fix the relative position of adjacent two pipes, and can also prevent relative rotation between adjacent pipes during use, improving the stability and reliability of the product during use.

[0006] The purpose of the utility model can be achieved by the following technical solutions: A pipe fitting connecting mechanism, comprising:

[0007] A first pipe fitting and a second pipe fitting;

[0008] A first connecting member, one end of the first connecting member is fixedly connected to the first pipe fitting;

[0009] A second connecting member, one end of the second connecting member is fixedly connected to the second pipe fitting, and the other end of the second connecting member is inserted and matched with the other end of the first connecting member to limit the relative rotation between the first pipe fitting and the second pipe fitting;

[0010] A connecting sleeve, located between the first connecting member and the second connecting member, and one end of the connecting sleeve is threadedly connected to the first connecting member, and the other end of the connecting sleeve is rotatably connected to the second connecting member.

[0011] In the above-mentioned pipe fitting connecting mechanism, it further comprises:

[0012] The anti-loosening structure has one end connected to the second connecting member and the other end matched with the connecting sleeve to limit the movement of the connecting sleeve along its axial direction.

[0013] In the above-mentioned pipe connection mechanism, the first connecting member includes a convex portion, a first plug-in portion and a third threaded portion, wherein the third threaded portion is located between the convex portion and the first plug-in portion, the third threaded portion is used for threaded connection with the connecting sleeve, the convex portion is suitable for plugging with the second connecting member to achieve a non-rotating fit between the first connecting member and the second connecting member, and the first plug-in portion is suitable for being inserted into the first pipe fitting to achieve a fixed connection with the first pipe fitting.

[0014] In the above-mentioned pipe connecting mechanism, the second connecting member includes a second plug-in portion and a recessed portion. The second plug-in portion is suitable for being inserted into the second pipe to achieve a fixed connection with the second pipe, and the recessed portion is suitable for being plugged into the protruding portion to achieve a non-rotating fit between the first connecting member and the second connecting member.

[0015] In the above-mentioned pipe connection mechanism, a first threaded portion is provided on the anti-loosening structure, and the first threaded portion is threadedly connected to the end face of the second connecting piece facing away from the end of the second pipe fitting. A second threaded portion is provided on the connecting sleeve, and the second threaded portion is used to realize the connection between the connecting sleeve and the first connecting piece, and the thread direction of the first threaded portion is opposite to the thread direction of the second threaded portion.

[0016] In the above-mentioned pipe connection mechanism, a smooth portion is also provided on the connecting sleeve, and the smooth portion and the second threaded portion are located at both ends of the connecting sleeve, wherein there is a gap between the end face of one end where the smooth portion is located and the end face of the second pipe fitting, and there is a gap between the end face of one end where the second threaded portion is located and the end face of the first pipe fitting.

[0017] In the above-mentioned pipe connecting mechanism, one end of the anti-loosening structure is connected to the end face of the second connecting member facing away from one end of the second pipe fitting, and a limiting portion is provided on the anti-loosening structure. When the limiting portion is projected onto the end face of the second connecting member, a partial projection of the limiting portion is located outside the end face and presses on a partial structure of the connecting sleeve, thereby limiting the movement of the connecting sleeve along its axial direction.

[0018] In the above-mentioned pipe connection mechanism, a step is formed between the smooth portion on the connecting sleeve and the second threaded portion, the smooth portion is sleeved on the outer wall of the second connecting piece, and the anti-loosening structure includes multiple anti-loosening parts, and the multiple anti-loosening parts are distributed circumferentially along the end face of the second connecting piece, and the first threaded portion of each anti-loosening part is threadedly connected to the second connecting piece, and the limiting portion of each anti-loosening part is blocked on the step to limit the movement of the connecting sleeve along its axial direction.

[0019] In the above-mentioned pipe fitting connection mechanism, the first connecting piece includes a concave portion, a first insertion portion, and a third threaded portion. The first insertion portion is used to be inserted into the first pipe fitting to achieve fixed connection with the first pipe fitting, and the third threaded portion is used for threaded connection with the connecting sleeve; the second connecting piece includes a second insertion portion and a convex portion, and the second insertion portion is adapted to be inserted into the second pipe fitting to achieve fixed connection with the second pipe fitting; the concave portion is adapted to be inserted into the convex portion to achieve anti-rotation cooperation between the first connecting piece and the second connecting piece.

[0020] In the above-mentioned pipe fitting connection mechanism, welding holes are provided on the pipe walls of the first pipe fitting and the second pipe fitting. When one ends of the first connecting piece and the second connecting piece are respectively inserted into the first pipe fitting and the second pipe fitting, welding fixation between the first pipe fitting and the first connecting piece and between the second pipe fitting and the second connecting piece is completed through the welding holes, and the outer walls of the first pipe fitting, the second pipe fitting, and the connecting sleeve are flush.

[0021] The present utility model also provides a display bracket, including the pipe fitting connection mechanism of any one of the above.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] (1). A pipe fitting connection mechanism provided by the present utility model realizes the fixation of the relative positions between two adjacent pipe fittings through the insertion cooperation between the first connecting piece and the second connecting piece, ensuring that after the two adjacent pipe fittings are connected, their relative circumferential positions are the expected positions; and locks the connection between the two adjacent pipe fittings through the connecting sleeve, thereby improving the stability and reliability of the product during use and improving the appearance of the entire product.

[0024] (2). The thread directions of the first threaded portion and the second threaded portion are set to be opposite, so that the threaded connection between the anti-loosening structure and the second connecting piece will not cause the anti-loosening structure to become disengaged from the second connecting piece due to the rotational movement between the connecting sleeve and the first connecting piece, thereby improving the reliability of the connection between the anti-loosening structure and the second connecting piece, and further improving the reliability of the connection between the two pipe fittings.

[0025] (3). There are gaps between the two end faces of the connecting sleeve and the end faces of the first pipe fitting and the second pipe fitting respectively, so as to ensure that the connecting sleeve can smoothly rotate around the axis direction, thereby realizing the connection locking between the first pipe fitting and the second pipe fitting. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of a pipe fitting connection mechanism of the present utility model.

[0027] Figure 2 is an exploded view of a pipe fitting connection mechanism of the present utility model.

[0028] Figure 3 isFigure 2 An enlarged view of part A.

[0029] Figure 4 It is a cross-sectional view of a pipe fitting connection mechanism of the present utility model.

[0030] In the figure, 10 is a pipe fitting; 11 is a first pipe fitting; 12 is a second pipe fitting; 13 is a welding hole;

[0031] 20 is a first connecting member; 21 is a convex portion; 211 is a first limiting surface; 22 is a third threaded portion; 23 is a first inserting portion;

[0032] 30 is a second connecting member; 31 is a concave portion; 311 is a second limiting surface; 32 is a second inserting portion;

[0033] 40 is a connecting sleeve; 41 is a second threaded portion; 42 is a smooth portion;

[0034] 50 is a loosening prevention structure; 51 is a loosening prevention member; 511 is a first threaded portion; 512 is a limiting portion. Detailed implementation manners

[0035] The following are specific embodiments of the present utility model and in combination with the attached drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0037] As Figures 1 to 4 shown, a pipe fitting connection mechanism provided by the present utility model includes:

[0038] Two pipe fittings 10, namely a first pipe fitting 11 and a second pipe fitting 12 respectively;

[0039] A first connecting member 20, one end of the first connecting member 20 is fixedly connected to the first pipe fitting 11;

[0040] A second connecting member 30, one end of the second connecting member 30 is fixedly connected to the second pipe fitting 12, and the other end of the second connecting member 30 is inserted and matched with the other end of the first connecting member 20 to limit the relative rotation between the first pipe fitting 11 and the second pipe fitting 12;

[0041] A connecting sleeve 40, located between the first connecting member 20 and the second connecting member 30, and one end of the connecting sleeve 40 is threadedly connected to the first connecting member 20, and the other end of the connecting sleeve 40 is rotatably connected to the second connecting member 30.

[0042] A pipe fitting connection mechanism provided by the utility model realizes the fixation of the relative circumferential positions between two adjacent pipe fittings 10 through the insertion fit between a first connecting piece 20 and a second connecting piece 30, ensuring that after the two adjacent pipe fittings are connected, their relative circumferential positions are the expected positions; and locks the connection between the two adjacent pipe fittings 10 through a connecting sleeve 40, thereby improving the stability and reliability of the product during use and improving the appearance of the entire product.

[0043] It should be noted that an important problem solved in this embodiment is how to fix the circumferential position of the first pipe fitting 11 relative to the second pipe fitting 12. For easy understanding, the technical problems faced in the prior art are illustrated as follows. For example, when the whole composed of the first pipe fitting 11 and the second pipe fitting 12 serves as the column of a TV bracket, a wire passing channel is usually arranged inside the column. At this time, an inlet and an outlet are arranged on the side wall near the upper end and the side wall near the lower end of the column, and it is required that the inlet and the outlet are on the same side of the column; for another example, for aesthetic needs, decorative structures or patterns that echo each other up and down are often arranged on the outer side walls of the first pipe fitting 11 and the second pipe fitting 12. However, the simple threaded connection between two pipe fittings in the prior art cannot achieve the above purposes. And this embodiment not only ingeniously solves the above technical problems, but also brings other technical effects. Exemplarily, since the first connecting piece 20 and the second connecting piece 30 are filled inside the connection of the two pipe fittings, the stability, reliability and support strength of the pipe fittings can be effectively improved.

[0044] Preferably, it further includes a loosening prevention structure 50, one end of which is connected to the second connecting piece 30, and the other end is in limit fit with the connecting sleeve 40, and the connecting sleeve 40 is limited to move along its axial direction through the loosening prevention structure 50. In this embodiment, when the connecting sleeve 40 rotates and is threadedly connected to the first connecting piece 20, the connecting sleeve 40 only idles relative to the second connecting piece 30 under the block of the loosening prevention structure 50 and does not displace axially relative to the second connecting piece 30.

[0045] Preferably, a first thread portion 511 is provided on the loosening prevention structure 50, and the first thread portion 511 is threadedly connected to the end surface of the second connecting piece 30 away from the second pipe fitting 12. A second thread portion 41 is provided on the connecting sleeve 40, and the second thread portion 41 is used to realize the connection between the connecting sleeve 40 and the first connecting piece 20, and the thread direction of the first thread portion 511 is opposite to the thread direction of the second thread portion 41.

[0046] In this embodiment, the thread directions of the first threaded portion 511 and the second threaded portion 41 are set oppositely, so that the threaded connection between the anti-loosening structure 50 and the second connecting member 30 will not cause the anti-loosening structure 50 and the second connecting member 30 to separate due to the rotational movement of the connecting sleeve 40 and the first connecting member 20, thereby improving the reliability of the connection between the anti-loosening structure 50 and the second connecting member 30, and further improving the reliability of the connection between the two pipe fittings 10.

[0047] Further preferably, one end of the anti-loosening structure 50 is connected to the end face of the second connecting member 30 which is away from the end of the second pipe fitting 12, and a limiting portion 512 is provided on the anti-loosening structure 50. When the limiting portion 512 is projected onto the end face of the second connecting member 30, a partial projection of the limiting portion 512 is located outside the end face and presses on a partial structure of the connecting sleeve 40, thereby limiting the movement of the connecting sleeve 40 along its axial direction.

[0048] Preferably, the connecting sleeve 40 is further provided with a smooth portion 42, and the smooth portion 42 and the second threaded portion 41 are located at both ends of the connecting sleeve 40, wherein a gap exists between the end face of one end where the smooth portion 42 is located and the end face of the second pipe 12, and a gap exists between the end face of one end where the second threaded portion 41 is located and the end face of the first pipe 11. The inner wall of the smooth portion 42 is smooth, and is sleeved on the outer wall of the second connecting member 30, so as to facilitate idling relative to the second connecting member 30.

[0049] In this embodiment, there are gaps between the end faces of the connecting sleeve 40 and the end faces of the first pipe 11 and the second pipe 12 respectively, so as to ensure that the connecting sleeve 40 can rotate smoothly around the axis direction, thereby realizing the connection and locking between the first pipe 11 and the second pipe 12.

[0050] Further preferably, a step is formed between the smooth portion 42 and the second threaded portion 41 on the connecting sleeve 40, and the inner diameter of the smooth portion 42 is smaller than the inner diameter of the threaded portion. The smooth portion 42 is sleeved on the outer wall of the second connecting member 30, and the anti-loosening structure 50 includes a plurality of anti-loosening members 51, and the plurality of anti-loosening members 51 are distributed along the circumference of the end face of the second connecting member 30, and the first threaded portion 511 of each anti-loosening member 51 is threadedly connected to the second connecting member 30, and the limiting portion 512 of each anti-loosening member 51 is blocked on the step, that is, the limiting portion 512 can be pressed on the end face of the smooth portion 42 facing the first pipe member 11, so as to limit the movement of the connecting sleeve 40 along its axial direction.

[0051] Preferably, the first connecting member 20 and the second connecting member 30 are in a concave-convex fit. Among them, the first connecting member 20 includes a convex portion 21, a first insertion portion 23, and a third threaded portion 22. Among them, the third threaded portion 22 is located between the convex portion 21 and the first insertion portion 23. The convex portion 21 is adapted to be inserted into the second connecting member 30 to achieve anti-rotation fit between the first connecting member 20 and the second connecting member 30. The first insertion portion 23 is adapted to be inserted into the first pipe fitting 11 to achieve fixed connection with the first pipe fitting 11.

[0052] Further preferably, the second connecting member 30 includes a second insertion portion 32 and a concave portion 31. The second insertion portion 32 is adapted to be inserted into the second pipe fitting 12 to achieve fixed connection with the second pipe fitting 12. The concave portion 31 is adapted to be inserted into the convex portion 21 to achieve anti-rotation fit between the first connecting member 20 and the second connecting member 30.

[0053] It is worth mentioning that the positions of the convex portion 21 and the concave portion 31 can be interchanged, that is, the concave portion 31 is provided on the first connecting member 20, and the convex portion 21 is provided on the second connecting member 30. That is, the first connecting member 20 includes a concave portion 31, a first insertion portion 23, and a third threaded portion 22. The first insertion portion 23 is used to be inserted into the first pipe fitting 11 to achieve fixed connection with the first pipe fitting 11. The third threaded portion 22 is used for threaded connection with the connecting sleeve 40. The second connecting member 30 includes a second insertion portion 32 and a convex portion 21. The second insertion portion 32 is adapted to be inserted into the second pipe fitting 12 to achieve fixed connection with the second pipe fitting 12. The concave portion 31 is adapted to be inserted into the convex portion 21 to achieve anti-rotation fit between the first connecting member 20 and the second connecting member 30.

[0054] Furthermore, a first limiting surface 211 and a second limiting surface 311 are respectively provided on the convex portion 21 and the concave portion 31. When the convex portion 21 and the concave portion 31 form an insertion fit, the first limiting surface 211 on the convex portion 21 is in contact with the second limiting surface 311 on the concave portion 31. The relative rotation between the first pipe fitting 11 and the second pipe fitting 12 is limited by the contact between the first limiting surface 211 and the second limiting surface 311.

[0055] It is worth mentioning that the limiting surface can be a plane or an arc surface. As shown in the figure, the limiting surface is a plane, and the cross-sections of the convex portion 21 and the concave portion 31 are quadrilateral.

[0056] Preferably, welding holes 13 are provided on the pipe walls of the first pipe fitting 11 and the second pipe fitting 12. When one ends of the first connecting member 20 and the second connecting member 30 are respectively inserted into the first pipe fitting 11 and the second pipe fitting 12, welding fixation between the first pipe fitting 11 and the first connecting member 20, and between the second pipe fitting 12 and the second connecting member 30 is completed through the welding holes 13.

[0057] It is worth mentioning that the first connecting member 20 completes the plug-in fit between the first connecting member 20 and the first pipe fitting 11 through the first plug-in portion 23, and the connection between the two is fixed by welding. The second connecting member 30 completes the plug-in fit between the second connecting member 30 and the second pipe fitting 12 through the second plug-in portion 32, and the connection between the two is fixed by welding. After the first connecting member 20 and the second connecting member 30 are respectively welded and fixed to the first pipe fitting 11 and the second pipe fitting 12, the outside of the welding hole 13 can be polished to make the outer walls of the first pipe fitting 11 and the second pipe fitting 12 smooth, thereby improving the aesthetics of the product.

[0058] Furthermore, the outer walls of the first pipe fitting 11, the second pipe fitting 12 and the connecting sleeve 40 are flush, so that after the first pipe fitting 11 and the second pipe fitting 12 are connected, the thickness of the outside is consistent, smooth and beautiful.

[0059] It should be noted that the first pipe fitting 11 and the second pipe fitting 12 can be round pipes, square pipes or pipes of any other shape.

[0060] In the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0061] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0062] The specific embodiments described herein are only examples to illustrate the spirit of the present utility model. Those skilled in the technical field to which the present utility model belongs can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A pipe connection mechanism, characterized in that: include: A first pipe member (11) and a second pipe member (12); A first connecting member (20), one end of the first connecting member (20) being fixedly connected to the first pipe member (11); a second connecting member (30), one end of the second connecting member (30) being fixedly connected to the second pipe member (12), and the other end of the second connecting member (30) being plug-fitted to the other end of the first connecting member (20) to limit relative rotation between the first pipe member (11) and the second pipe member (12); A connecting sleeve (40) is located between the first connecting member (20) and the second connecting member (30), and one end of the connecting sleeve (40) is threadedly connected to the first connecting member (20), and the other end of the connecting sleeve (40) is rotatably connected to the second connecting member (30).

2. The pipe connection mechanism according to claim 1, characterized in that: Also includes: An anti-loosening structure (50) has one end connected to the second connecting member (30) and the other end limitedly cooperates with the connecting sleeve (40), and the connecting sleeve (40) is limited to move along its axial direction by the anti-loosening structure (50).

3. The pipe connection mechanism according to claim 2, characterized in that: The first connecting member (20) comprises a convex portion (21), a first plug-in portion (23) and a third threaded portion (22), wherein the third threaded portion (22) is located between the convex portion (21) and the first plug-in portion (23), the third threaded portion (22) is used for threaded connection with the connecting sleeve (40), the convex portion (21) is suitable for plugging with the second connecting member (30) to achieve a non-rotating fit between the first connecting member (20) and the second connecting member (30), and the first plug-in portion (23) is suitable for being inserted into the first pipe member (11) to achieve a fixed connection with the first pipe member (11).

4. The pipe connection mechanism according to claim 3, characterized in that: The second connecting member (30) comprises a second plug-in portion (32) and a recessed portion (31); the second plug-in portion (32) is suitable for being inserted into the second pipe member (12) to achieve a fixed connection with the second pipe member (12); and the recessed portion (31) is suitable for being plugged into the protruding portion (21) to achieve a non-rotational fit between the first connecting member (20) and the second connecting member (30).

5. The pipe connection mechanism according to claim 2, characterized in that: The anti-loosening structure (50) is provided with a first threaded portion (511), the first threaded portion (511) being threadedly connected to an end surface of the second connecting member (30) which is away from the second pipe member (12), and the connecting sleeve (40) is provided with a second threaded portion (41), the second threaded portion (41) being used to realize the connection between the connecting sleeve (40) and the first connecting member (20), and the thread direction of the first threaded portion (511) is opposite to the thread direction of the second threaded portion (41).

6. The pipe connection mechanism according to claim 5, characterized in that: The connecting sleeve (40) is further provided with a smooth portion (42), and the smooth portion (42) and the second threaded portion (41) are located at two ends of the connecting sleeve (40), wherein a gap exists between an end surface where the smooth portion (42) is located and an end surface of the second pipe member (12), and a gap exists between an end surface where the second threaded portion (41) is located and an end surface of the first pipe member (11).

7. The pipe connection mechanism according to claim 6, characterized in that: One end of the anti-loosening structure (50) is connected to an end surface of the second connecting member (30) which is away from an end of the second pipe member (12), and a limiting portion (512) is provided on the anti-loosening structure (50). When the limiting portion (512) is projected onto the end surface of the second connecting member (30), a partial projection of the limiting portion (512) is located outside the end surface and presses on a partial structure of the connecting sleeve (40), thereby limiting the movement of the connecting sleeve (40) along its axial direction.

8. The pipe connection mechanism according to claim 7, characterized in that: A step is formed between the smooth portion (42) and the second threaded portion (41) on the connecting sleeve (40), the smooth portion (42) is sleeved on the outer wall of the second connecting member (30), the anti-loosening structure (50) comprises a plurality of anti-loosening members (51), the plurality of anti-loosening members (51) are distributed along the circumference of the end surface of the second connecting member (30), and the first threaded portion (511) of each anti-loosening member (51) is threadedly connected to the second connecting member (30), and the limiting portion (512) of each anti-loosening member (51) is blocked on the step to limit the movement of the connecting sleeve (40) along its axial direction.

9. The pipe connection mechanism according to claim 2, characterized in that: The first connecting member (20) comprises a recessed portion (31), a first plug-in portion (23) and a third threaded portion (22); the first plug-in portion (23) is used to be inserted into the first pipe member (11) to achieve a fixed connection with the first pipe member (11); the third threaded portion (22) is used to be threadedly connected with the connecting sleeve (40); the second connecting member (30) comprises a second plug-in portion (32) and a convex portion (21); the second plug-in portion (32) is suitable for being inserted into the second pipe member (12) to achieve a fixed connection with the second pipe member (12); the recessed portion (31) is suitable for being plugged into the convex portion (21) to achieve a non-rotation fit between the first connecting member (20) and the second connecting member (30).

10. The pipe connection mechanism according to any one of claims 1 to 9, characterized in that: A welding hole (13) is provided on the tube wall of the first tube member (11) and the second tube member (12); when one end of the first connecting member (20) and the second connecting member (30) are respectively inserted into the first tube member (11) and the second tube member (12), the first tube member (11) and the first connecting member (20) as well as the second tube member (12) and the second connecting member (30) are welded and fixed through the welding hole (13), and the outer walls of the first tube member (11), the second tube member (12) and the connecting sleeve (40) are flush.

11. A display stand, characterized in that: It comprises the pipe connection mechanism according to any one of claims 1 to 10.

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