Innovative double-layer aluminum-shaped pipe structure

Abstract

The utility model discloses an innovative double-layer aluminum-shaped pipe structure, which relates to the technical field of telescopic pipes, and comprises a telescopic outer pipe body, an inner pipe body and a driving mechanism, and the outer pipe body is nested on the outer side of the inner pipe body; the outer pipe body comprises an outer pipe outer layer and an outer pipe inner layer, the outer pipe outer layer is composed of a plurality of outer pipe outer layer pipe joints with different diameters, the pipe diameters of the outer pipe outer layer pipe joints are gradually increased from top to bottom, and the outer pipe outer layer pipe joints are connected in a sliding and sleeving mode; the outer pipe inner layer is composed of a plurality of outer pipe inner layer pipe joints with different diameters, the pipe diameters of the outer pipe inner layer pipe joints are gradually reduced from top to bottom, and the outer pipe inner layer pipe joints are connected in a sliding and sleeving mode. According to the structure, the outer pipe body is additionally arranged on the basis of a traditional single-layer shrinkage pipe for nesting, and the stability and the bearing capacity of the structure are remarkably improved; due to the double-layer design, transverse force impact and load can be more effectively resisted, deformation during extension is reduced, and the safety of the whole structure is improved; in addition, the structure is smaller in size in a contraction state and convenient to store and transport.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic tubes, in particular to an innovative double-layer "Lu"-shaped tube structure. Background Art

[0002] Existing single-layer shrink tubing technology has been widely adopted in numerous applications, including aerospace, industry, home furnishings, and personal electronic device accessories. However, these single-layer shrink tubing often has limitations in load-bearing capacity and stability, particularly when extended to its maximum length, where it is prone to bending. This bending not only reduces efficiency but also increases safety risks, limiting its application in applications requiring high stability and load-bearing capacity.

[0003] The utility model proposes an innovative double-layer "LV"-shaped tube structure. Utility Model Content

[0004] This utility model aims to provide an innovative double-layer "Lu"-shaped tube structure. By adding an outer layer of shrinkable tube to the traditional single-layer shrinkable tube, the structure's stability and load-bearing capacity are significantly improved. This design more effectively resists lateral impacts and loads, reduces deformation during extension, and improves overall structural safety.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An innovative double-layer "Lu"-shaped tube structure, comprising a retractable outer tube body, an inner tube body and a drive mechanism, wherein the outer tube body is nested outside the inner tube body;

[0007] The outer tube body includes an outer tube outer layer and an outer tube inner layer, the outer tube outer layer is composed of multiple outer tube outer layer tube segments with different diameters, the diameters of the multiple outer tube outer layer tube segments gradually increase from top to bottom, and are slidably connected to each other; the outer tube inner layer is composed of multiple outer tube inner layer tube segments with different diameters, the diameters of the multiple outer tube inner layer tube segments gradually decrease from top to bottom, and are slidably connected to each other; the upper end of the outer tube outer layer is fixedly connected to the upper end of the outer tube inner layer, and the lower end of the outer tube outer layer is fixedly connected to the lower end of the outer tube inner layer via a connecting bottom plate;

[0008] The inner tube body is located in the inner cavity of the inner layer of the outer tube, and the inner tube body is composed of multiple inner tube segments with different diameters. The diameters of the multiple inner tube segments gradually decrease from top to bottom, and the segments are slidably connected to each other.

[0009] The driving mechanism includes an outer tube driving member and an inner tube driving member, both of which are arranged in the inner cavity of the inner tube body, and the lower end of the outer tube driving member is connected to the bottom of the outer tube body, and the lower end of the inner tube driving member is connected to the bottom of the inner tube body; the upper ends of the outer tube driving member and the inner tube driving member are both connected to the driving device.

[0010] As a further improvement of the above solution, the numbers of the outer layer pipe segments of the outer tube, the inner layer pipe segments of the outer tube, and the inner pipe segments are all equal.

[0011] As a further improvement of the above solution, the outer diameter of each pipe segment of the inner pipe segment is smaller than or equal to the inner diameter of each pipe segment of the inner layer of the outer pipe segment, so that the inner pipe segment can be expanded and contracted in the inner cavity of the inner layer of the outer pipe segment.

[0012] As a further improvement of the above scheme, except for the lowest inner tube segment, vertical grooves 1 are provided on both sides of the inner walls of the other inner tube segments; except for the uppermost inner tube segment, vertical ridges are provided on both sides of the outer walls of the other inner tube segments; the ridges match the size of groove 1, and when the inner tube body contracts, the ridges on the next inner tube segment are received in groove 1 of the previous inner tube segment to prevent axial rotation when the inner tube segment contracts.

[0013] As a further improvement of the above scheme, except for the topmost outer tube inner layer section, vertical grooves 2 are provided on both sides of the outer walls of other outer tube inner layer sections. The grooves 2 match the size of the convex strips. When the inner tube body is extended, the convex strips on each inner tube section are limited in the grooves 2 of the corresponding outer tube inner layer section to prevent axial rotation when the inner tube section is extended.

[0014] As a further improvement of the above scheme, except for the outer layer pipe section of the outer tube at the lowest end, pedals are provided on both side walls of the outer layer pipe sections of other outer tubes, and the lower end of the pedals is rotatably connected to the bottom of the pedal storage groove on the side wall of the outer layer pipe section of the outer tube through a hinge; a vertical groove is provided in the middle of the pedal, and a support rod is slidably provided inside the vertical groove, and the lower end of the support rod is rotatably connected to the support rod storage groove on the outer wall of the outer layer pipe section of the outer tube.

[0015] As a further improvement of the above scheme, two support plate receiving grooves are symmetrically provided on the side walls of at least two of the outer layer pipe sections of the outer tube in the middle, and the connecting line of the two support plate receiving grooves on the same outer layer pipe section of the outer tube is perpendicular to the connecting line of the two pedal receiving grooves; a support plate is provided in the support plate receiving groove, and the top of the support plate is rotatably connected to the top of the support plate receiving groove through a hinge, and a torsion spring is sleeved on the rotating shaft of the hinge, and the two ends of the torsion spring are respectively in contact with the outer walls of the support plate and the outer layer pipe section of the outer tube, so that the support plate tends to rotate inward under the elastic force of the torsion spring.

[0016] As a further improvement of the above scheme, the lower end of the lowest inner tube section is provided with an arc-shaped cover plate, and a through hole 1 is provided in the middle of the arc-shaped cover plate. The lower end of the outer tube body driving member passes through the through hole 1 and is fixed to the connecting base plate; the arc-shaped cover plate is symmetrically provided with through holes 2 on both sides of the through hole 1, and the lower ends of the two symmetrically arranged inner tube body driving members are fixed in the two through holes 2.

[0017] As a further improvement of the above solution, the lower end of the outer tube body driving member is fixedly connected to a support plate, the diameter of the support plate is larger than the lower end aperture of the outer tube body, and when the outer tube body driving member contracts, the lower end of the outer tube body is driven to contract upward through the support plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This structure significantly improves the stability and bearing capacity of the structure by adding an outer tube body to the traditional single-layer shrink tube for nesting. At the same time, the outer tube body is composed of an outer tube outer layer and an outer tube inner layer. This design allows the inner tube body and the inner layer of the outer tube body to fit tightly when the tube body is extended, which can more effectively resist lateral force impact and load, reduce deformation during extension, and improve the safety of the overall structure. In addition, this structure is smaller in size when in the collapsed state, making it convenient for storage and transportation.

[0020] The utility model provides an innovative double-layer "Lu"-shaped tube structure. By arranging an automatically flip-up and retractable pedal on the side wall of the outer tube body, the double-layer "Lu"-shaped tube structure can be used as a ladder or a fire escape ladder. By arranging an automatically flip-up and retractable support plate on the side wall of the outer tube body, the lateral supporting force between the outer tube outer layer section and the inner tube section of the outer tube is enhanced during the extension process of the double-layer "Lu"-shaped tube structure, thereby increasing the overall supporting force of the double-layer "Lu"-shaped tube structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional diagram of the first embodiment of the present invention.

[0022] Figure 2 This is an exploded view of Example 1 of the present utility model.

[0023] Figure 3 This is a cross-sectional view of the outer tube body in Example 1 of the present invention.

[0024] Figure 4 This is a partially enlarged view of the inner tube body in Example 1 of the present utility model.

[0025] Figure 5 This is a partially enlarged view of the inner layer of the outer tube in Example 1 of the present utility model.

[0026] Figure 6 This is a diagram of the contracted state of the first embodiment of the present invention.

[0027] Figure 7 This is a cross-sectional view of the contracted state of the first embodiment of the present invention.

[0028] Figure 8 This is a three-dimensional diagram of the second embodiment of the present invention.

[0029] Figure 9This is a cross-sectional view of the second embodiment of the present invention.

[0030] Figure 10 This is a three-dimensional diagram of the outer tube body in the second embodiment of the present invention.

[0031] Figure 11 It is a three-dimensional diagram of the outer layer pipe section of the outer pipe in the second embodiment of the present utility model.

[0032] Figure 12 This is an expanded view of the upper support plate of the outer layer pipe section of the outer pipe in the second embodiment of the present utility model.

[0033] Figure 13 for Figure 9 A magnified view of the middle panel.

[0034] Figure 14 This is an expanded view of the outer tube body with support plates of the utility model.

[0035] Figure 15 It is a three-dimensional diagram of the outer layer pipe section of the outer pipe with a support plate of the utility model.

[0036] Figure 16 This is an expanded view of the outer layer pipe section of the outer pipe with a support plate of the utility model.

[0037] Figure 17 It is a left oblique view of the outer layer pipe section of the outer pipe with a support plate of the utility model.

[0038] Figure 18 for Figure 17 Magnified view of B.

[0039] Figure 19 This is a cross-sectional view of the outer tube body with the support plate of the utility model.

[0040] In the figure: 1. Outer tube; 2. Inner tube; 3. Driving mechanism; 4. Fixing buckle;

[0041] 11. Outer tube outer layer; 12. Outer tube inner layer; 13. Connecting bottom plate; 21. Inner tube section; 22. Raised strip; 23. Groove 1; 24. Through hole 1; 25. Through hole 2; 31. Support plate; 32. Hook; 33. Outer tube drive element; 34. Inner tube drive element; 121. Outer tube inner section; 122. Groove 2;

[0042] 111. Outer tube outer layer section; 112. Pedal; 113. Pedal storage slot; 114. Vertical slot; 115. Support rod; 116. Hinge; 117. Support rod storage slot; 118. Support plate; 119. Support plate storage slot. DETAILED DESCRIPTION

[0043] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0044] Example 1:

[0045] Reference Figure 1-Figure 7 An innovative double-layer "Lu"-shaped tube structure is suitable for selfie sticks or support poles in industrial and furniture fields, providing more stable support. It includes a retractable outer tube body 1, an inner tube body 2 and a drive mechanism 3. The outer tube body 1 is nested on the outside of the inner tube body 2.

[0046] The outer tube body 1 includes an outer tube outer layer 11 and an outer tube inner layer 12. The outer tube outer layer 11 is composed of multiple outer tube outer layer pipe segments 111 of different diameters. The diameters of the multiple outer tube outer layer pipe segments 111 gradually increase from top to bottom and are slidably connected to each other. The outer tube inner layer 12 is composed of multiple outer tube inner layer pipe segments 121 of different diameters. The diameters of the multiple outer tube inner layer pipe segments 121 gradually decrease from top to bottom and are slidably connected to each other. The upper end of the outer tube outer layer 11 is fixedly connected to the upper end of the outer tube inner layer 12, and the lower end of the outer tube outer layer 11 is fixedly connected to the lower end of the outer tube inner layer 12 via a connecting bottom plate 13.

[0047] The inner tube body 2 is located in the inner cavity of the outer tube inner layer 12, and the inner tube body 2 is composed of multiple inner tube segments 21 with different diameters. The diameters of the multiple inner tube segments 21 gradually decrease from top to bottom, and the inner tube segments 21 are slidably connected to each other.

[0048] The driving mechanism 3 includes an outer tube body driving member 33 and an inner tube body driving member 34. The outer tube body driving member 33 and the inner tube body driving member 34 are both arranged in the inner cavity of the inner tube body 2, and the lower end of the outer tube body driving member 33 is connected to the bottom of the outer tube body 1, and the lower end of the inner tube body driving member 34 is connected to the bottom of the inner tube body 2; the upper ends of the outer tube body driving member 33 and the inner tube body driving member 34 are both connected to the driving device; the outer tube body driving member 33 and the inner tube body driving member 34 here are driving rods, and the driving device can be a hydraulic machine or other machine that can drive the driving rod to extend and retract.

[0049] The number of outer tube outer segments 111, outer tube inner segments 121, and inner tube segments 21 is equal. The outer diameter of each inner tube segment 21 is less than or equal to the inner diameter of each outer tube inner segment 121, so that the inner tube segment 21 can expand and contract within the inner cavity of the outer tube inner segment 121.

[0050] Among them, except for the bottom inner tube segment 21, vertical grooves 23 are provided on both sides of the inner walls of the other inner tube segments 21; except for the top inner tube segment 21, vertical ridges 22 are provided on both sides of the outer walls of the other inner tube segments 21; the ridges 22 match the sizes of the grooves 23. When the inner tube body 2 shrinks, the ridges 22 on the next inner tube segment 21 are received in the grooves 23 of the previous inner tube segment 21 to prevent the inner tube segment 21 from axial rotation when shrinking.

[0051] Among them, except for the top outer tube inner layer tube segment 121, vertical grooves 122 are provided on both sides of the outer walls of the other outer tube inner layer tube segments 121. The grooves 122 match the size of the ridges 22. When the inner tube body 2 is extended, the ridges 22 on each inner tube segment 21 are limited in the grooves 122 of the corresponding outer tube inner layer tube segment 121 to prevent axial rotation of the inner tube segment 21 when it is extended.

[0052] The lower end of the lowest inner tube section 21 is provided with an arc-shaped cover plate, and a through hole 1 24 is provided in the middle of the arc-shaped cover plate. The lower end of the outer tube body driving member 33 passes through the through hole 1 24 and is fixed to the connecting base plate 13; the arc-shaped cover plate is symmetrically provided with through holes 25 on both sides of the through hole 1 24, and the lower ends of the two symmetrically arranged inner tube body driving members 34 are fixed in the two through holes 25.

[0053] When the double-layer "LV"-shaped tube structure needs to be extended for support, the driving device first drives the outer tube driving member 33 to extend, and then drives the outer tube 1 to extend, and then the driving device drives the inner tube driving member 34 to extend, and then drives the inner tube 2 to extend, and the inner and outer tubes are nested with each other to form a support rod;

[0054] When support is not needed, the driving device first drives the inner tube body driving member 34 to contract, and drives the inner tube segment 21 on the inner tube body 2 to contract. When all the used inner tube segments 21 are stored inside the uppermost inner tube segment 21, the driving device drives the outer tube body driving member 33 to contract, and drives the outer tube outer layer segment 111 and the outer tube inner layer segment 121 on the outer tube body 1 to contract. When all the outer tube outer layer segments 111 and the outer tube inner layer segments 121 are stored in the second segment of the outer tube body 1, the entire storage is completed, forming a contracted body with a length of only two segments.

[0055] The double-layer "Lu"-shaped tube structure adds an outer tube body 1 to the single-layer shrink tube (inner tube body 2) for nesting, which significantly improves the stability and bearing capacity of the structure; at the same time, the outer tube body 1 is composed of an outer tube outer layer 11 and an outer tube inner layer 12. This design allows the inner tube body 2 and the inner layer of the outer tube body 1 to fit tightly when the tube body is extended, which can more effectively resist lateral force impact and load, reduce deformation during extension, and improve the safety of the overall structure; in addition, this structure is smaller in size in the contracted state, which is convenient for storage and transportation.

[0056] Example 2

[0057] Reference Figures 8-13 An innovative double-layer "Lu"-shaped tube structure is used for tactile simulation devices in the field of virtual reality (such as climbing ladders). The upper ends of the outer tube body 1 and the inner tube body 2 are fixed to the ceiling of the roof. It can also be used as a fire escape ladder and is installed at the lower end of the drainage eaves outside the window with a fixed head.

[0058] Its structure is based on the first embodiment and further adds the following features: except for the outer tube outer layer pipe section 111 at the lowest end, pedals 112 are provided on both side walls of the other outer tube outer layer pipe sections 111, and the lower end of the pedal 112 is rotatably connected to the bottom of the pedal storage groove 113 located on the side wall of the outer tube outer layer pipe section 111 through a hinge 116, and a torsion spring is sleeved on the rotating shaft of the hinge, and the two ends of the torsion spring are respectively in contact with the pedal 112 and the outer wall of the outer tube outer layer pipe section 111, so that the pedal 112 tends to rotate outward under the elastic force of the torsion spring; a vertical groove 114 is provided in the middle of the pedal 112, and a support rod 115 is slidably provided inside the vertical groove 114, and the lower end of the support rod 115 is rotatably connected to the support rod storage groove 117 on the outer wall of the outer tube outer layer pipe section 111.

[0059] The lower end of the outer tube drive member 33 is fixedly connected to the support plate 31. The diameter of the support plate 31 is larger than the aperture of the lower end of the outer tube 1. When the outer tube drive member 33 contracts, the support plate 31 drives the lower end of the outer tube 1 to retract upward. Here, the outer tube drive member 33 and the inner tube drive member 34 are steel ropes, and the driving device can be a winch motor or other machine capable of driving the steel rope to retract.

[0060] A hook 32 is provided at the lower end of the support plate 31, and a fixing buckle 4 is provided on the floor inside the room. The upper end of the fixing buckle 4 is a connecting ring. When the outer tube body 1 is extended, the hook 32 is hooked on the connecting ring.

[0061] In a further embodiment, in order to increase the lateral support force of the ladder or fire escape ladder, the following solution is added on the basis of the second embodiment: Figure 14-19 As shown, two support plate receiving grooves 119 are symmetrically provided on the side walls of at least two outer tube outer layer sections 111 in the middle. The line connecting the two support plate receiving grooves 119 on the same outer tube outer layer section 111 is perpendicular to the line connecting the two pedal receiving grooves 113. A support plate 118 is provided in the support plate receiving groove 119. The top of the support plate 118 is rotatably connected to the top of the support plate receiving groove 119 via a hinge. A torsion spring is sleeved on the rotating shaft of the hinge. The two ends of the torsion spring are respectively in contact with the support plate 118 and the outer wall of the outer tube outer layer section 111, so that the support plate 118 has a tendency to rotate inward under the elastic force of the torsion spring. The structure of the support plate 118 is similar to that of the pedal 112. A vertical groove is also provided in the middle of the support plate 118. A support rod 115 is also provided in the vertical groove. The upper end of the support rod 115 is rotatably connected to the inner wall of the outer tube outer layer section 111.

[0062] When used as a tactile simulation device in the field of virtual reality (such as a climbing ladder) or a fire escape ladder, the upper ends of the outer tube body 1 and the inner tube body 2 are fixed to the ceiling of the roof or the lower end of the drainage eaves outside the window, and three winch motors are installed at the lower end of the drainage eaves outside the ceiling or the window. A steel wire rope is connected to each winch motor, and the lower end of the steel wire rope is connected to the bottom of the outer tube body 1 and the bottom of the inner tube body 2;

[0063] During use, the outer tube driving member 33 (steel wire rope) is first released by the hoisting motor, allowing the outer tube 1 to extend under the action of gravity, and the hook 32 under the support plate 31 at the bottom of the outer tube 1 is hooked onto the fixing buckle 4 on the floor to fix the outer tube 1; then the inner tube driving member 34 (steel wire rope) is released by the hoisting motor, allowing the inner tube 2 to extend under the action of gravity and fit into the inner cavity of the outer tube 1;

[0064] During the extension of the outer tube body 1, the pedal 112 rotates outward under the action of the torsion spring and is supported by the support rod 115, so that the pedal 112 is horizontally stepped, thereby simulating climbing a ladder. At the same time, the support plate 118 rotates inward under the action of the torsion spring and is supported by the support rod 115, forming a horizontal support on the outer wall of the inner tube section 121 of the outer tube. This strengthens the lateral support force between the outer tube section 111 and the inner tube section 121 of the outer tube, thereby increasing the support force of the entire telescopic tube.

[0065] When not in use, the hook 32 is loosened and the inner tube driving member 34 (wire rope) is tightened by the hoisting motor first, so that the inner tube 2 is retracted upward. When the inner tube 2 is completely stored, the outer tube driving member 33 (wire rope) is tightened by the hoisting motor, and the outer tube 1 is driven to retract upward by the supporting plate 31. During the process of the outer tube outer layer tube segment 111 being retracted, the upper end of the outer tube outer layer tube segment 111 at the lower end will squeeze the support rod 115 on the upper end of the outer tube outer layer tube segment 111, so that the support rod 115 is stored in the support rod storage groove 117, and at the same time, the outer tube 111 is squeezed. The pedal 112 is stored in the pedal storage groove 113, thereby realizing automatic storage of the pedal 112; at the same time, the lower end of the outer tube outer layer pipe section 111 at the upper end will squeeze the support plate 118 on the outer tube outer layer pipe section 111 at the lower end, so that the support plate 118 rotates outward and is stored in the support plate storage groove 119, thereby realizing automatic storage of the support plate 118; thereby reducing space occupancy; when all the outer tube outer layer pipe sections 111 and the outer tube inner layer pipe sections 121 are stored in the second pipe section of the outer tube body 1, the entire storage is completed; the double-layer "LV"-shaped tube structure.

Claims

1. An innovative double-layer "Lu"-shaped tube structure, characterized in that: It comprises a telescopic outer tube (1), an inner tube (2) and a driving mechanism (3), wherein the outer tube (1) is nested on the outer side of the inner tube (2); The outer tube body (1) comprises an outer tube outer layer (11) and an outer tube inner layer (12); the outer tube outer layer (11) is composed of a plurality of outer tube outer layer tube segments (111) of different diameters, the diameters of the plurality of outer tube outer layer tube segments (111) gradually increase from top to bottom, and the plurality of outer tube inner layer tube segments (111) are slidably connected to each other; the outer tube inner layer (12) is composed of a plurality of outer tube inner layer tube segments (121) of different diameters, the diameters of the plurality of outer tube inner layer tube segments (121) gradually decrease from top to bottom, and the plurality of outer tube inner layer tube segments (121) are slidably connected to each other; the upper end of the outer tube outer layer (11) is fixedly connected to the upper end of the outer tube inner layer (12), and the lower end of the outer tube outer layer (11) is fixedly connected to the lower end of the outer tube inner layer (12) via a connecting bottom plate (13); The inner tube body (2) is located in the inner cavity of the inner layer (12) of the outer tube, and the inner tube body (2) is composed of a plurality of inner tube segments (21) with different diameters, the diameters of the plurality of inner tube segments (21) gradually decrease from top to bottom, and the inner tube segments (21) are slidably connected to each other; The driving mechanism (3) comprises an outer tube driving member (33) and an inner tube driving member (34); the outer tube driving member (33) and the inner tube driving member (34) are both arranged in the inner cavity of the inner tube (2); the lower end of the outer tube driving member (33) is connected to the bottom of the outer tube (1), and the lower end of the inner tube driving member (34) is connected to the bottom of the inner tube (2); and the upper ends of the outer tube driving member (33) and the inner tube driving member (34) are both connected to the driving device.

2. An innovative double-layer "Lu"-shaped tube structure according to claim 1, characterized in that: The numbers of the outer tube outer layer pipe segments (111), the outer tube inner layer pipe segments (121), and the inner tube pipe segments (21) are all equal.

3. An innovative double-layer "Lu"-shaped tube structure according to claim 2, characterized in that: The outer diameter of each pipe segment of the inner pipe segment (21) is smaller than or equal to the inner diameter of each pipe segment of the outer pipe inner layer segment (121), so that the inner pipe segment (21) can be expanded and contracted in the inner cavity of the outer pipe inner layer segment (121).

4. An innovative double-layer "Lu"-shaped tube structure according to claim 3, characterized in that: Except for the bottom inner tube section (21), vertical grooves (23) are provided on both sides of the inner walls of the other inner tube sections (21); except for the top inner tube section (21), vertical convex strips (22) are provided on both sides of the outer walls of the other inner tube sections (21); the convex strips (22) match the sizes of the grooves (23), and when the inner tube body (2) contracts, the convex strips (22) on the next inner tube section (21) are received in the grooves (23) of the previous inner tube section (21).

5. An innovative double-layer "Lv"-shaped tube structure according to claim 4, characterized in that: Except for the top outer tube inner layer pipe section (121), both sides of the outer walls of the other outer tube inner layer pipe sections (121) are provided with vertical grooves 2 (122), the grooves 2 (122) are matched with the size of the convex strips (22), and when the inner tube body (2) is extended, the convex strips (22) on each inner tube section (21) are limited in the grooves 2 (122) of the corresponding outer tube inner layer pipe section (121).

6. An innovative double-layer "Lv"-shaped tube structure according to claim 5, characterized in that: Except for the outer tube outer layer pipe section (111) at the lowermost end, both side walls of the other outer tube outer layer pipe sections (111) are provided with pedals (112), and the lower end of the pedal (112) is rotatably connected to the bottom of a pedal storage groove (113) located on the side wall of the outer tube outer layer pipe section (111) through a hinge (116); a vertical groove (114) is provided in the middle of the pedal (112), and a support rod (115) is slidably provided inside the vertical groove (114), and the lower end of the support rod (115) is rotatably connected to the support rod storage groove (117) on the outer wall of the outer tube outer layer pipe section (111).

7. An innovative double-layer "Lv"-shaped tube structure according to claim 6, characterized in that: Two support plate receiving grooves (119) are symmetrically provided on the side walls of at least two of the outer tube outer layer sections (111) in the middle, and the connecting line of the two support plate receiving grooves (119) on the same outer tube outer layer section (111) is perpendicular to the connecting line of the two pedal receiving grooves (113); a support plate (118) is provided in the support plate receiving groove (119), and the top of the support plate (118) is rotatably connected to the top of the support plate receiving groove (119) through a hinge, and a torsion spring is sleeved on the rotating shaft of the hinge, and the two ends of the torsion spring are respectively in contact with the support plate (118) and the outer wall of the outer tube outer layer section (111), so that the support plate (118) has a tendency to rotate inward under the elastic force of the torsion spring.

8. An innovative double-layer "Lu"-shaped tube structure according to any one of claims 1 to 7, characterized in that: The lower end of the lowermost inner tube section (21) is provided with an arc-shaped cover plate, a through hole (24) is provided in the middle of the arc-shaped cover plate, the lower end of the outer tube body driving member (33) passes through the through hole (24) and is fixed to the connecting bottom plate (13); the arc-shaped cover plate is symmetrically provided with through holes (25) on both sides of the through hole (24), and the lower ends of the two symmetrically arranged inner tube body driving members (34) are fixed in the two through holes (25).

9. The innovative double-layer "Lv"-shaped tube structure according to claim 1 is characterized in that: The lower end of the outer tube driving member (33) is fixedly connected to a support plate (31), the diameter of the support plate (31) is larger than the aperture of the lower end of the outer tube (1), and when the outer tube driving member (33) contracts, the support plate (31) drives the lower end of the outer tube (1) to contract upward.

Images