CN117536963A - Expansion link anticreep structure and expansion link and multi-functional little table - Google Patents

Abstract

The telescopic rod anti-drop structure comprises a plurality of sections of sub-pipe fittings, wherein the second ends of the sub-pipe fittings sequentially slide and can be accommodated in the first end of the next sub-pipe fitting, the first end is provided with a receiving part, and the second end is provided with an interface part; the connecting component is provided with a plug-in part and a first limiting part, the plug-in part is plugged in the plug-in part, the first limiting part is matched with the receiving part, and the second end of the sub-pipe fitting is limited to be separated from the next sub-pipe fitting; a locking groove is arranged on the connecting component; the locking piece is connected in the locking groove and tightly pushes the plug-in connection part to the interface part. According to the telescopic rod anti-falling structure, the connecting component is arranged at the tail end of the sub-pipe fitting, the connecting component and the telescopic rod anti-falling structure slide together and are contained in the next sub-pipe fitting, the front end of the next sub-pipe fitting is provided with the collecting part, the sub-pipe fitting is limited to be pulled out of the next sub-pipe fitting by matching with the connecting component, and meanwhile, the locking component is arranged on the connecting component to prevent the connecting component from falling off from the sub-pipe fitting, so that the sub-pipe fitting is prevented from being pulled out of the next sub-pipe fitting.

Description

Expansion link anticreep structure and expansion link and multi-functional little table

Technical Field

The invention relates to the field of telescopic rod machinery, in particular to a telescopic rod anti-falling structure, a telescopic rod and a multifunctional small table plate.

Background

The telescopic rod can be used in a plurality of structures with the height required to be adjusted due to the length change, one of the existing telescopic rod structures is that a connecting block is arranged at the tail end of a sub rod, and the sub rod is pulled out by limiting the front end of the other sub rod and the connecting block, so that the sub rod is limited to be pulled out from the other sub rod. However, in this structure, since the connection block is inserted into the sub-rod and fixed to the sub-rod by the clip structure, the connection block is detached from the sub-rod by the impact of the connection block with the front end of the other sub-rod when the telescopic rod is elongated, so that the sub-rod is pulled out from the other sub-rod.

Based on this, there is a need to provide a telescopic rod anti-disengaging structure.

Disclosure of Invention

In order to achieve the above purpose, the present invention provides the following technical solutions:

the telescopic rod anti-falling structure comprises a plurality of sections of sub-pipe fittings 11, wherein each sub-pipe fitting 11 is provided with a first end 111 and a second end 112, the second ends 112 of the sub-pipe fittings 11 sequentially slide and can be contained in the first end 111 of the next sub-pipe fitting 11, the first end 111 of the sub-pipe fitting 11 is provided with a receiving part 41, and the second ends 112 of the sub-pipe fittings 11 are provided with an interface part 114; the connecting member 2 further comprises a plugging portion 22 and a first limiting portion 23, the plugging portion 22 is plugged into the interface portion 114 and slides in the next sub-pipe fitting 11 along with the second end 112 of the sub-pipe fitting 11, and the first limiting portion 23 is matched with the closing portion 41 to limit the second end 112 of the sub-pipe fitting 11 to be separated from the first end 111 of the next sub-pipe fitting 11; a locking groove is arranged on the connecting component 2 and is positioned on one side of the plugging part 22 away from the sub-pipe fitting 11; the locking piece 3 is connected in the locking groove, and pushes the plug-in part 22 against the interface part 114, so that the engagement member 2 is limited to fall off from the second end 112 of the sub-pipe fitting 11.

Further, the engagement member 2 further includes a base 21; the first limiting part 23 is arranged at the outer edge of the base 21; the plugging portion 22 is disposed on the base 21 and is used for connecting the sub-pipe 11.

Further, the plugging portion 22 includes an arm plate 221 and a first fastening portion 222; the two ends of the arm plate 221 are respectively connected with the base 21 and the first fastening part 222; the interface 114 is provided with a second engaging portion 113, which is engaged with the first engaging portion 222.

Further, the locking member 3 comprises a seat plate 31 and a plurality of fork arms 32; one end of the fork arm 32 is connected to one side of the seat plate 31 facing the engagement member 2, and is disposed corresponding to the insertion portion 22.

Further, the yoke 32 includes a top plate 321 and at least one reinforcing plate 322; the reinforcing plate 322 is connected to a side of the top plate 321 away from the plugging portion 22.

Further, a third fastening portion 24 is provided on the engagement member 2; the locking member 3 is provided with a fourth engaging portion 33, and the locking member 3 is restricted in the locking groove by engaging with the third engaging portion 24.

Further, a second limiting portion 34 is provided on the seat plate 31; the engagement member 2 is provided with a limiting groove, and cooperates with the second limiting portion 34 to limit the horizontal movement of the locking member 3.

Further, the distance between the second limiting portion 34 and the engaging member 2 is greater than the distance between the fourth fastening portion 33 and the engaging member 2, so that the fourth fastening portion 33 protrudes from the outer wall of the second limiting portion 34, thereby limiting the rotation of the locking piece 3 relative to the engaging member 2.

The invention also provides a telescopic rod, which comprises the anti-falling structure; the connecting sleeve 4 is connected with the first end 111 of the sub-pipe fitting 11 and is provided with the receiving part 41 and the opening sleeve 42, the opening sleeve 42 comprises a plurality of sub-boards 421, and the sub-boards 421 are distributed at intervals; the lock sleeve 5 is connected with the notch sleeve 42 through threads, and the minimum caliber of the notch sleeve 42 is changed by screwing the lock sleeve 5, so that the length of the other sub-pipe fitting 11 inserted into the connecting sleeve 4 is fixed.

The invention also provides a multifunctional small table board, which comprises the telescopic rod 10; a panel member 20 rotatably connected to one end of the telescopic rod 10; a base 30 connected to the other end of the telescopic rod; the panel member 20 is provided with a reading assembly comprising a book retainer 201 rotatably connected to the panel member 20 and/or a book pressing bar 202 rotatably connected to the panel member 20 or the book retainer 201.

According to the telescopic rod anti-falling structure, the connecting component is arranged at the tail end of the sub-pipe fitting, the connecting component and the sub-pipe fitting slide together and are contained in the next sub-pipe fitting, the front end of the next sub-pipe fitting is provided with the receiving part, the connecting component is matched with the connecting component to limit the sub-pipe fitting to be pulled out of the next sub-pipe fitting, meanwhile, the locking component is arranged on the connecting component to prevent the connecting component from falling off from the sub-pipe fitting, the technical problem that the sub-pipe fitting is pulled out of the next sub-pipe fitting is effectively avoided, and the telescopic rod has better structural stability.

Drawings

In order to more clearly illustrate the inventive embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without the need of inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an anti-falling structure of a telescopic rod according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a section of an anti-falling structure of the telescopic rod.

FIG. 3 is a schematic view of the structure of the engagement member.

Fig. 4 is a schematic structural view of the locking member.

Fig. 5 is a schematic structural view of the connecting sleeve.

Fig. 6 is a schematic structural diagram of a multifunctional tablet according to an embodiment of the present invention.

Reference numerals illustrate:

10. a telescopic rod; 11. a sub-pipe fitting; 111. a first end; 112. a second end; 113. a second buckling part; 114. interface part

20. A panel member; 201. a book blocking piece; 202. pressing book strips;

30. a base;

2. a joining member; 21. a base; 22. a plug-in part; 23. a first limit part; 24. a third buckling part; 221. an arm plate; 222. a first buckling part;

3. a locking member; 31. a seat plate; 32. a fork arm; 33. a fourth buckling part; 34. a second limit part; 321. a top plate; 322. a reinforcing plate;

4. connecting sleeves; 41. a receiving portion; 42. a notch sleeve; 43. installing a buckle plate; 421. a sub-board; 422. a guide surface;

5. a lock sleeve;

6. and (5) installing a block.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the examples and the accompanying drawings. It should be noted that the embodiments described below in conjunction with the drawings are exemplary and intended to illustrate the inventive concept and should not be construed as limiting the inventive concept.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include at least one such feature, either explicitly or implicitly; the meaning of "a plurality of" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

Terms such as "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise.

The positional or positional relationships indicated as terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are based on the positional or positional relationships shown in the drawings, are merely for convenience in describing the inventive aspects of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. For example, a first feature "on" or "under" a second feature may be the first and second features directly contacting each other, or the first and second features indirectly contacting each other through an intervening medium; the first feature being "above," "over" and "on" the second feature may be the first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature; the first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

As shown in fig. 1-5, a preferred embodiment of a telescopic rod anti-falling structure provided by the invention comprises a plurality of sections of sub-pipe fittings 11, wherein each sub-pipe fitting 11 is provided with a first end 111 and a second end 112, the second ends 112 of the sub-pipe fittings 11 sequentially slide and can be accommodated in the first end 111 of the next sub-pipe fitting 11, the first end 111 of the sub-pipe fitting 11 is provided with a receiving part 41, and the second ends 112 of the sub-pipe fittings 11 are provided with an interface part 114; the connecting member 2 is provided with a plug-in part 22 and a first limiting part 23, the plug-in part 22 is plugged in the interface part 114, and slides in the next sub-pipe fitting 11 along with the second end 112 of the sub-pipe fitting 11, and the first limiting part 23 is matched with the receiving part 41 to limit the second end 112 of the sub-pipe fitting 11 to be separated from the first end 111 of the next sub-pipe fitting 11; the connecting component 2 is provided with a locking groove which is positioned at one side of the plug-in part 22 away from the pipe fitting 11; the locking piece 3 is connected in the locking groove, and the plug-in part 22 is tightly propped against the interface part 114, so that the connection member 2 is limited to fall off from the second end 112 of the sub-pipe fitting 11; according to the invention, the adaptor member 2 is used for limiting the adaptor member 2 from being pulled out of the next adaptor member 11, and the locking member 3 is used for limiting the adaptor member 2 from falling out of the adaptor member 11, so that the structural failure of the telescopic rod 10 in the using process is effectively avoided, and the telescopic rod 10 has better using stability.

Specifically, the engagement member 2 further includes a base 21; the first limiting part 23 is arranged at the outer edge of the base 21; the plugging portion 22 is disposed on the base 21 and located on a side of the first limiting portion 23 away from the sub-pipe fitting 11. In this embodiment, the sub-pipe fitting 11 is preferably a cylindrical pipe, the first limiting portion 23 is located at the outer edge of the connecting member 2, and the inserting portion 22 is located closer to the center of the connecting member 2 than the first limiting portion 23, so that the connecting member 2 can be clamped to the second end 112 of the sub-pipe fitting 11, that is, to the tail end of the sub-pipe fitting 11, and the first limiting portion 23 is higher than the side outer wall of the sub-pipe fitting 11, and can form a limiting fit with the closing portion 41 of the first end 111 of the next sub-pipe fitting 11 when the sub-pipe fitting 11 slides to the end of its travel. The first limiting portion 23 may be a convex edge around the base 21, or may be formed by a plurality of protruding blocks distributed along the outer edge of the base 21.

The plugging portion 22 includes an arm plate 221 and a first fastening portion 222; the two ends of the arm plate 221 are respectively connected with the base 21 and the first buckling part 222, so that the first buckling part 222 is suspended above the base 21, and the first buckling part 222 has a certain movable stroke by the micro deformation of the arm plate 221 so as to insert the inserting part 22 into the second end 112 of the sub pipe fitting 11; a second buckling part 113 is arranged at the second end 112 of the sub-pipe fitting 11 and forms a buckling fit with the first buckling part 222, so that the connecting component 2 is fixed on the sub-pipe fitting 11 to a certain extent; further, by installing the locking member 3 at the rear of the arm plate 221, i.e., at the end facing away from the first fastening portion 222, the first fastening portion 222 is kept in a state of being engaged with the second fastening portion 113, so that the situation that the sub pipe fitting 11 is pulled out from the next sub pipe fitting 11 by an external force is effectively avoided. In the present embodiment, the plugging portion 22 has a pair of oppositely disposed arm plates 221, the first fastening portion 222 is a protruding block protruding outward from the arm plates 221, and the second fastening portion 113 is a slot hole preset on the sub-tube 11.

The receiving portion 41 is disposed at the first end 111 of the next sub-pipe fitting 11, and cooperates with the engaging member 2 mounted at the second end 112 of the sub-pipe fitting 11, and the receiving portion 41 cooperates with the first limiting portion 23 of the engaging member 2 to limit the sub-pipe fitting 11 to slide in the next sub-pipe fitting 11. In this embodiment, the receiving portion 41 is disposed on the connecting sleeve 4, the connecting sleeve 4 is clamped to the first end 111, i.e. the front end, of the next sub-pipe fitting 11, and the receiving portion 41 is disposed on one side of the connecting sleeve 4 closer to the center of the length direction of the next sub-pipe fitting 11, so as to form a spacing fit with the first spacing portion 23. In other embodiments, the closing-in portion 41 may be a raised ring or a plurality of raised blocks distributed in a ring shape integrally formed with the first end 111 of the sub-pipe 11 and raised toward the center of the hollow pipe.

The locking member 3 comprises a seat plate 31 and a plurality of fork arms 32; one end of the fork arm 32 is connected to one side of the seat plate 31 facing the engagement member 2, and is disposed corresponding to the insertion portion 22. Yoke 32 includes a top plate 321 and at least one stiffening plate 322; the reinforcing plate 322 is connected to a side of the top plate 321 remote from the socket 22. The force bearing area of the plug-in connection part 22 is increased through the fork arms 32, and the force bearing strength of the fork arms 32 is increased through the reinforcing plate 322, so that the locking piece 3 can push the first buckling part 222 into the second buckling part 113, and the pull-out preventing effect is ensured.

The engagement member 2 is provided with a third engagement portion 24; the fourth fastening part 33 is provided on the locking member 3, and cooperates with the third fastening part 24 to limit the locking member 3 in the locking groove, so as to prevent the locking member 3 from being separated from the locking groove and reduce the anti-disengaging effect of the telescopic rod 10. In this embodiment, the fourth fastening portions 33 are respectively disposed on two sides of the yoke 32, the fourth fastening portions 33 are preferably buckle plates with inverted buckles, and the third fastening portions 24 are preferably buckle grooves disposed on the inner side of the connecting member 2.

Further, a second limiting portion 34 is provided on the seat plate 31; the engagement member 2 is provided with a limiting groove, and the second limiting portion 34 is matched with the limiting groove to limit the horizontal movement of the locking piece 3. In this embodiment, the second limiting portion 34 preferably protrudes from an annular protruding edge of the seat plate 31 near the end face of the engaging member 2, and the limiting groove is preferably disposed in an annular groove of the engaging member 2 near the end face of the locking member 3; in other simple alternative embodiments, the second limiting portion 34 may be provided on the engagement member 2, and the limiting groove is provided on the locking member 3.

Further, the distance between the second limiting portion 34 and the engaging member 2 is greater than the distance between the fourth engaging portion 33 and the engaging member 2, so that the fourth engaging portion 33 protrudes from the outer wall of the second limiting portion 34, that is, on the seat plate 31, the fourth engaging portion 33 is further outside than the second limiting portion 34, and the rotation of the locking member 3 relative to the engaging member 2 is limited.

The invention also provides a telescopic rod 10, comprising the anti-falling structure; the connecting sleeve 4 is connected with the first end 111 of the sub pipe fitting 11 and is provided with a receiving part 41 and a notch sleeve 42, the notch sleeve 42 comprises a plurality of sub boards 421, and the sub boards 421 are distributed at intervals; the lock sleeve 5 is connected with the notch sleeve 42 through threads, and the lock sleeve 5 is screwed to be close to the connecting sleeve 4, so that the minimum caliber of the notch sleeve 42 can be changed, and the length of the next sub-pipe fitting 11 inserted into the connecting sleeve 4 is fixed.

In this embodiment, the sub-pipe fitting 11 has three sections, the first end 111 of the first sub-pipe fitting 11 is not assembled with the notch sleeve 42, the second end 112 of the last sub-pipe fitting 11 is not assembled with the engagement member 2 and the locking member 3, and the outer member is connected through the preset mounting portion, for example, the first section is connected with the first hinge block and then connected with the panel member 20, and the last section is connected with the mounting block 6 and then connected with the base 30.

The shape of the notch sleeve 42 is preferably adapted to the shape of the sub-pipe fitting 11, and is inserted into the first end 111 of the sub-pipe fitting 11, i.e. the end far away from the connecting member 2, in this embodiment, the sub-pipe fitting 11 is a cylindrical pipe, correspondingly, the notch sleeve 42 is cylindrical, and is fastened to a mounting hole site preset in the first end 111 of the sub-pipe fitting 11 by means of a mounting buckle 43.

The sub-plate 421 is disposed at an end remote from the mounting gusset 43, extends upwardly from the notch cover 42, and terminates at a free end. The sub-boards 421 are distributed in a circular ring shape, and gaps are formed between the sub-boards 421 to provide space for the furling of the tail ends of the sub-boards 421.

Threads are provided at the rear of the sub-plate 421 to be screw-coupled with the lock sleeve 5.

With the illustration as the direction, the both ends opening of lock sleeve 5 is big-end-up to twist the in-process downwards, extrude daughter board 421, make the opening that daughter board 421 encloses draw in, reduce opening cover 42 bore, thereby press from both sides tight last daughter pipe fitting 11 of wearing to locate wherein, finally reach the purpose of fixed telescopic link 10 length, one of them beneficial effect of this setting is, make telescopic link 10 can adjust length wantonly, and can lock and make the length after adjusting, in order to be suitable for more application scenarios, and have the use experience of last preferred. In other embodiments, corresponding extrusion blocks can be arranged on the inner wall of the lock sleeve 5 instead of the small-top and large-bottom openings at the two ends of the lock sleeve 5.

Further, a guide surface 422 is provided at the end of the sub-board 421 to improve the efficiency of the lock sleeve 5 for changing the aperture of the notch sleeve 42. The extrusion and guide surfaces 422 may be provided simultaneously, or only one of them may be selected.

During assembly, the notch sleeve 42 is inserted into the first end 111 of the next sub-pipe fitting 11; the second end 112 of the sub-pipe 11 penetrates from the first end 111 of the next sub-pipe; then plugging the engagement member 2 into the second end 112 of the sub-tube 11; then the locking piece 3 is clamped into the locking groove of the connecting component 2; finally, the lock sleeve 5 is mounted on the notch sleeve 42 on the next sub-pipe fitting 11.

When in use, the lock sleeve 5 is rotated upwards, and the sub-pipe fitting 11 is loosened; subsequently adjusting the length of extension of the sub-tube 11 in the next sub-tube 11 until the intended use length is reached; the lock sleeve 5 is then rotated downwards, in the process, the lock sleeve 5 presses the sub-plate 421, and under the combined action of the inner wall of the lock sleeve 5 and the guide surface 422 of the sub-plate 421, the sub-plate 421 is folded towards the center of the notch sleeve 42, so that the minimum caliber of the notch sleeve 42 is reduced, and finally the last sub-pipe fitting 11 is clamped, so that the length of the sub-pipe fitting 11 extending from the next sub-pipe fitting 11 cannot be changed at will.

Referring to fig. 6, the present invention further provides a multifunctional small table board, which comprises the telescopic rod 10; a panel member 20 rotatably connected to one end of the telescopic rod 10 for supporting an article; a base 30 connected to the other end of the telescopic rod 10 for allowing the small table to rest on the ground or other objects; the panel member 20 is provided with a reading assembly comprising a book blocking member 201, a rotating connecting panel member 20, and/or a book pressing bar 202, wherein the rotating connecting panel member 20 or book blocking member 201, the book blocking member 201 is used for preventing articles, books, etc. placed on the panel member 20, and the book pressing bar 202 is used for pressing pages of the books so as to prevent the pages from being turned randomly. By adjusting the length of the telescoping pole 10, the height of the deck member 20 is adjustable, enabling personalized customization of the height of use of the tablet to match the use preferences of different users.

One application of the multifunctional small desk board is as a common small desk, and the other application is as a reading rack.

In the embodiment, the lower end of the telescopic rod 10 is fixed with a mounting block 6, and the mounting block 6 is hinged in a preset fixed groove on the base 30; the upper end of the telescopic rod 10 is fixed with a first hinge block, and the back of the panel member 20 is provided with a second hinge block, and the first hinge block is rotatably connected with the second hinge block.

An angle fixing member is provided between the first hinge block and the second hinge block for fixing the use angle of the panel member 20.

In one embodiment, the first hinging block and the second hinging block are respectively provided with mutually meshed angle lugs; the second hinging block is C-shaped, two ends of the second hinging block are hinged with the hinging arms, the first hinging block is hinged between the two hinging arms through a rotating shaft, and the angle lug is arranged on the side wall of the first hinging block and the hinging arms; the first hinging block and the second hinging block are mutually abutted by the angle fixing component, so that the angle protruding blocks positioned on the first hinging block and the second hinging block are meshed, and the purpose of fixing the using angle of the panel component 20 is achieved; when the angle needs to be adjusted, the angle fixing member is operated, the first hinge block and the second hinge block are loosened, and then the panel member 20 is rotated to adjust the angle; after the adjustment, the angle fixing component is operated, so that the first hinge block and the second hinge block are close together.

In this embodiment, the second hinge block and the angle fixing member are respectively provided with an angle projection. The angle fixing component is arranged on the second hinging block in a sliding way and comprises a key part, an extension part and a resetting piece; the reset piece is preferably a pressure spring and is arranged between the key part and the first hinging block or the second hinging block; the angle lug is arranged on the extension part, the angle lug of the extension part abuts against the angle lug on the second hinging block through the reset piece, when the key part is pressed down, the reset piece is extruded to counteract the acting force of the reset piece to enable the angle lug of the extension part to abut against the second hinging block, and then the panel 20 is rotated, so that the use angle of the panel 20 can be adjusted.

According to the telescopic rod anti-falling structure, the connecting component is arranged at the tail end of the sub-pipe fitting, the connecting component and the sub-pipe fitting slide together and are contained in the next sub-pipe fitting, the front end of the next sub-pipe fitting is provided with the receiving part, the connecting component is matched with the connecting component to limit the sub-pipe fitting to be pulled out of the next sub-pipe fitting, meanwhile, the locking component is arranged on the connecting component to prevent the connecting component from falling off from the sub-pipe fitting, the technical problem that the sub-pipe fitting is pulled out of the next sub-pipe fitting is effectively avoided, and the telescopic rod has better structural stability.

The above examples represent only a part of the embodiments of the invention, and those skilled in the art can make several variations, substitutions and improvements without departing from the inventive concept, which fall within the scope of the invention.

Claims (10)

1. The utility model provides a telescopic link anticreep structure, includes multisection child pipe fitting (11), child pipe fitting (11) have first end (111) and second end (112), second end (112) of child pipe fitting (11) slide in proper order and can accomodate in next first end (111) of child pipe fitting (11), its characterized in that:

the first end (111) of the sub-pipe fitting (11) is provided with a receiving part (41), and the second end (112) of the sub-pipe fitting (11) is provided with an interface part (114);

the connecting component (2) is provided with a plug-in part (22) and a first limiting part (23), the plug-in part (22) is plugged in the interface part (114) and slides in the next sub-pipe fitting (11) along with the second end (112) of the sub-pipe fitting (11), and the first limiting part (23) is matched with the closing-in part (41) to limit the second end (112) of the sub-pipe fitting (11) to be separated from the first end (111) of the next sub-pipe fitting (11);

a locking groove is formed in the connecting component (2) and is positioned at one side of the inserting part (22) away from the sub-pipe fitting (11);

and the locking piece (3) is connected in the locking groove, and the plug-in part (22) is propped against the interface part (114), so that the connection component (2) is limited to fall off from the second end (112) of the sub pipe fitting (11).

2. The telescopic link anti-drop structure according to claim 1, wherein the engagement member (2) further comprises a base (21);

the first limiting part (23) is arranged at the outer edge of the base (21);

the plug-in part (22) is arranged on the base (21) and is used for connecting the sub-pipe fittings (11).

3. The telescopic link release prevention structure according to claim 2, wherein the insertion portion (22) includes an arm plate (221) and a first fastening portion (222);

two ends of the arm plate (221) are respectively connected with the base (21) and the first buckling part (222);

a second fastening part (113) is arranged on the interface part (114) and is in snap fit with the first fastening part (222).

4. A telescopic link anti-release structure according to any one of claims 1-3, wherein the locking member (3) comprises a seat plate (31) and a number of prongs (32);

one end of the fork arm (32) is connected with one side of the seat board (31) facing the connecting component (2), and the fork arm is arranged corresponding to the inserting part (22).

5. The telescopic link anti-drop structure according to claim 4, wherein the yoke (32) comprises a top plate (321) and at least one reinforcing plate (322);

the reinforcing plate (322) is connected to one side of the top plate (321) away from the plug-in connection part (22).

6. The telescopic link anti-falling structure according to claim 4, wherein the engagement member (2) is provided with a third engagement portion (24);

a fourth buckling part (33) is arranged on the locking piece (3) and is matched with the third buckling part (24), so that the locking piece (3) is limited in the locking groove.

7. The telescopic link anti-drop structure according to claim 6, characterized in that a second limit portion (34) is provided on the seat plate (31);

the connecting component (2) is provided with a limiting groove which is matched with the second limiting part (34) to limit the horizontal movement of the locking piece (3).

8. The telescopic link release preventing structure according to claim 7, wherein the distance between the second limiting portion (34) and the engaging member (2) is greater than the distance between the fourth buckling portion (33) and the engaging member (2), so that the fourth buckling portion (33) protrudes from the outer wall of the second limiting portion (34), and the locking member (3) is limited to rotate relative to the engaging member (2).

9. A telescopic rod comprising an anti-slip structure according to any one of claims 1 to 8;

the connecting sleeve (4) is connected with the first end (111) of the sub-pipe fitting (11) and is provided with the closing-in part (41) and the opening sleeve (42), the opening sleeve (42) comprises a plurality of sub-boards (421), and the sub-boards (421) are distributed at intervals;

the lock sleeve (5) is connected with the opening sleeve (42) through threads, the minimum caliber of the opening sleeve (42) is changed by screwing the lock sleeve (5), and therefore the length of the other sub-pipe fitting (11) inserted into the connecting sleeve (4) is fixed.

10. A multi-functional tablet according to claim 9, comprising a telescopic rod (10);

a panel member (20) rotatably connected to one end of the telescopic rod (10);

a base (30) connected to the other end of the telescopic rod;

the reading assembly is arranged on the panel (20) and comprises a book blocking piece (201), the panel (20) is connected in a rotating mode, and/or a book pressing strip (202) is connected with the panel (20) or the book blocking piece (201) in a rotating mode.