Telescopic pipe assembly

Abstract

The utility model provides a telescopic pipe assembly, which comprises at least two telescopic pipes which are inserted to be matched in a telescopic mode and a locking mechanism located between the two telescopic pipes, and the locking mechanism comprises a sliding frame arranged in one telescopic pipe in a sliding mode and a driving piece fixedly arranged in the other telescopic pipe. The driving piece and the sliding frame spirally rotate in the axial direction of the telescopic pipe; the sliding frame slides in the axial direction of the telescopic pipe, and the generated sliding distance is smaller than or equal to 150 cm. One eccentric mechanism in the driving piece or the sliding frame is provided with an expansion mechanism matched with the eccentric mechanism, and when the two telescopic pipes rotate relatively, the eccentric mechanism abuts against the inner wall of the expansion mechanism, so that the outer surface of the eccentric mechanism abuts against and interferes with the inner wall of one telescopic pipe, and locking of the telescopic pipes is completed. According to the eccentric rotary locking device, the eccentric rotary locking effect is achieved through a simple structure.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic tubes, in particular to a telescopic tube assembly. Background Art

[0002] Telescopic tubes are widely used in various fields as common mechanical auxiliary tools, enabling length adjustment in various applications. However, these tubes require a return spring to reset them, and when they are locked during extension, they require pressure from a steel ball or other device against the inner wall of the tube, making assembly complex and inconvenient. Utility Model Content

[0003] The purpose of the utility model is to provide a telescopic tube assembly, which can achieve locking by utilizing eccentric force to rotate by arranging a driving member, a sliding frame, and an eccentric mechanism.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions.

[0005] A telescopic tube assembly includes at least two telescopic tubes that are plugged together for telescopic engagement, and a locking mechanism located between the two telescopic tubes. The locking mechanism includes a sliding frame slidably disposed within one telescopic tube and a driving member fixedly disposed within the other telescopic tube. The driving member and the sliding frame are configured to helically rotate along the axial direction of the telescopic tubes.

[0006] The sliding frame slides along the axial direction of the telescopic tube, and the resulting sliding distance is less than or equal to 150 cm;

[0007] One of the driving members or the sliding frame is provided with an eccentric mechanism, and the other is provided with an expansion mechanism that cooperates with the eccentric mechanism. When the two telescopic tubes rotate relative to each other, the eccentric mechanism abuts against the inner wall of the expansion mechanism, so that its outer surface tightly interferes with the inner wall of one of the telescopic tubes, thereby completing the locking of the telescopic tubes.

[0008] Furthermore, the expansion mechanism includes an elastic sleeve located outside the driving member, and when the eccentric mechanism rotates, the elastic sleeve is forced to expand outward or return to its original position and shrink inward.

[0009] Furthermore, the outer wall of the elastic sleeve is provided with a wear-resistant layer, the inner wall of the elastic sleeve cooperates with the eccentric mechanism, and the wear-resistant layer cooperates with the outer telescopic tube.

[0010] Furthermore, the elastic sleeve includes a connecting ring, and the connecting ring extends upward and / or downward to form a plurality of expansion pieces, and the connection between adjacent expansion pieces forms an elastic member.

[0011] Furthermore, during the spiral rotation of the driving member and the sliding frame, the eccentric mechanism causes the movement direction of the expansion mechanism to deviate, causing it to expand outwards and tend to interfere with the inner wall of the outer telescopic tube, or to collapse inwards and tend to disengage from the inner wall of the outer telescopic tube.

[0012] Furthermore, the eccentric mechanism is evenly distributed in a clockwise or counterclockwise direction on a circumferential direction with the center line of the telescopic tube as the center line, and in the circumferential direction, one end of the eccentric mechanism forms a gradually convex trend toward the other end.

[0013] Furthermore, the gradual convexity is specifically a state in which the maximum thickness of the eccentric mechanism becomes thicker from one end to the other end.

[0014] Furthermore, it also includes a spiral rod and a spiral hole that form a spiral rotation. Along the axial direction, one of the spiral rod and the spiral hole is set at the center line of the driving member, and the other is set at the center line of the sliding frame.

[0015] Furthermore, the driving member includes an end plate and a driving column formed by axially extending the end plate, the spiral rod is formed by extending the driving column away from the end plate, and the eccentric mechanism is arranged along the outer surface of the driving column;

[0016] The sliding frame includes an assembly frame arranged along the circumferential direction and an assembly seat located at the end of the assembly frame. The assembly seat is axially provided with the spiral hole, and the extending direction of the spiral hole is consistent with the length direction of the assembly seat.

[0017] Furthermore, an auxiliary reset member is provided between the driving member and the sliding frame, and the auxiliary reset member enables relative movement between the driving member and the sliding frame, thereby generating a tendency for the eccentric mechanism to push the expansion mechanism radially outward during reset.

[0018] The beneficial effects of the utility model are as follows:

[0019] In the utility model, an eccentric mechanism is used to form an eccentric rotation between the sliding frame and the driving member, and then locking or unlocking is completed by interference during the eccentric rotation. Compared with steel balls, etc., the structure is simple and the operation is convenient.

[0020] During use of the present invention, the eccentric mechanism enables the driving member or the sliding frame to move toward the outer telescopic tube during movement, thereby achieving the effect of abutment interference locking. The structure is simple, the assembly is smooth, and the operation is easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of the telescopic tube assembly provided by the utility model;

[0022] Figure 2A cross-sectional view of the telescopic tube assembly provided by the present invention;

[0023] Figure 3 An exploded view of the locking structure provided by the present invention;

[0024] Figure 4 A schematic structural diagram of the locking structure provided by the present utility model;

[0025] Figure 5 A schematic diagram of the structure of the expansion mechanism provided by the utility model;

[0026] Figure 6 This is a structural schematic diagram of the telescopic tube assembly provided by the present invention in a locked state;

[0027] Figure 7 This is a structural schematic diagram of the telescopic tube assembly provided by the utility model in the unlocked state;

[0028] Figure 8 This is a front view of the telescopic tube assembly provided by the utility model in the unlocked state;

[0029] Figure 9 A cross-sectional view of the telescopic tube assembly provided by the present invention in an unlocked state;

[0030] Figure 10 A cross-sectional view of the unlocked state provided by the present invention;

[0031] Figure 11 This is a structural schematic diagram of the telescopic tube assembly provided by the utility model applied to a tripod;

[0032] In the picture:

[0033] 1. Telescopic tube; 11. First telescopic tube; 12. Second telescopic tube; 2. Driving member; 21. End plate; 22. Sliding sleeve; 3. Sliding frame; 31. Driving column; 32. Assembly frame; 33. Limiting groove; 4. Eccentric mechanism; 41. Outer convex structure; 5. Expansion mechanism; 51. Elastic sleeve; 511. Connecting ring; 512. Expansion sheet; 52. Elastic member; 6. Screw rod; 7. Screw hole; 8. Auxiliary reset member; 9. Fixing member. DETAILED DESCRIPTION

[0034] The present invention is described in detail below with reference to the various embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in this field based on these embodiments are all within the scope of protection of the present invention.

[0035] Refer to the attached Figure 1-11As shown, the telescopic tube assembly in this embodiment includes at least two telescopic tubes 1 that are plugged together for telescopic cooperation, and a locking mechanism located between the two telescopic tubes 1. In this embodiment, the telescopic tubes include a small first telescopic tube 11 and a larger second telescopic tube 12. The length of the first telescopic tube 11 can be adjusted by extending it into or out of the second telescopic tube 12.

[0036] In this embodiment, the locking mechanism includes a sliding frame 3 slidably disposed within one telescopic tube 1, and a driving member 2 fixedly disposed within the other telescopic tube 1. The driving member 2 and the sliding frame 3 rotate helically along the axial direction of the telescopic tube 1. That is, only one telescopic tube needs to be acted upon to cause the driving member 2 or the sliding frame 3 to move, thereby driving the other to rotate along the axial direction of the telescopic tube 1. Relative rotation is achieved between the driving member 2 and the sliding frame 3 to achieve rotational locking.

[0037] Specifically, the sliding frame 3 in this embodiment slides along the axial direction of the telescopic tube 1, and the resulting sliding distance is less than or equal to 150 cm. At this time, the sliding distance of the slider 3 is the unlocking or locking distance. If the distance here is greater than 150 cm, the space occupied is larger, so that the distance for forming the unfolded telescopic tube of the same size is increased, and then less than 150 cm is sufficient. The entire sliding distance is at least 5 mm to meet the use of small brackets, such as when used in a photographic tripod, and its sliding distance is preferably 5 mm-15 mm.

[0038] To enhance the locking effect, an eccentric mechanism 4 is provided on one of the drive member 2 and the sliding frame 3, while the other is provided with an expansion mechanism 5 that cooperates with the eccentric mechanism 4. During the relative rotation of the two telescopic tubes 1, the eccentric mechanism 4 abuts the inner wall of the expansion mechanism 5, causing its outer surface to interfere with the inner wall of one of the telescopic tubes 1, thereby locking the telescopic tubes 1. At this point, the drive member and the sliding frame, rotating along the center of the telescopic tubes, are driven by the eccentric mechanism 4 to contact the expansion mechanism 5, causing them to rotate away from each other and approach the outer telescopic tube 1, achieving locking. In this embodiment, the locking and unlocking of the two telescopic tubes are synchronized during the rotation and sliding of the drive member and the sliding frame. To enhance locking strength, the addition of the expansion mechanism and eccentric mechanism eliminates the need for steel balls, resulting in a simple structure and secure locking.

[0039] In this embodiment, the expansion mechanism is described as follows:

[0040] To facilitate locking, the expansion mechanism 5 includes an elastic sleeve 51 located outside the driver 2. As the eccentric mechanism 4 rotates, the elastic sleeve 51 is forced to expand outward or return inward. In this embodiment, the elastic sleeve 51 can be implemented by providing a hollow structure, for example, and then using a shell with a certain degree of elasticity, such as a plastic shell. This allows the sleeve to expand outward in response to external force and return to its original position when the external force is removed.

[0041] Furthermore, the outer wall of the elastic sleeve 51 is provided with a wear-resistant layer (not shown). The inner wall of the elastic sleeve 51 cooperates with the eccentric mechanism 4, and the wear-resistant layer cooperates with the larger outer second telescopic tube 12. In this embodiment, the wear-resistant layer is provided, for example, using a rubber layer or a nylon layer, thereby increasing friction with the inner wall of the telescopic tube, providing excellent wear resistance, and further ensuring a more stable locking between the telescopic tubes.

[0042] In this embodiment, the elastic sleeve 51 specifically includes a connecting ring 511 and a plurality of expansion pieces 512 connected by the connecting ring 511. Compared to separately providing a plurality of expansion pieces 512, this connection method provides an integrated connection with greater security and strength. When the relevant eccentric action is subsequently performed, a greater force is applied, thereby increasing the locking force. In this embodiment, an elastic member 52 is provided at the connecting ring 511 at the connection between adjacent expansion pieces. This facilitates increasing the spacing between the expansion pieces 512 during expansion, thereby cooperating with the eccentric mechanism.

[0043] In this embodiment, the expansion mechanism may also be a plurality of unconnected expansion pieces.

[0044] In this embodiment, the eccentric mechanism is described as follows:

[0045] In this embodiment, as the drive member 2 and the sliding frame 3 spirally rotate, the eccentric mechanism 4 deflects the movement direction of the expansion mechanism 5, causing it to expand outwards and interfere with the inner wall of the outer telescopic tube 1, or to collapse inwards and disengage from the inner wall of the outer telescopic tube 1. In this embodiment, this mechanism directly acts on the larger second telescopic tube 12, interfering with or disengaging from its inner wall, thereby locking or unlocking the second telescopic tube 12 with the first telescopic tube 11.

[0046] In this embodiment, the eccentric mechanism 4 is evenly distributed clockwise or counterclockwise along the circumference of a circle centered on the centerline of the telescopic tube. The eccentric mechanism 4 forms a gradually convex shape from one end toward the other. In this embodiment, the eccentric mechanism 4 comprises a raised convex structure 41. The gradually convex shape is characterized by a gradual increase in the maximum thickness of the eccentric mechanism from one end to the other. For example, the eccentric mechanism 4 is a hollow cylinder, with a convex structure formed along the outer circumference from top to bottom. The convex structure gradually increases in thickness from one end to the other. From a top view, the convex structure 41 is arc-shaped, and its length matches the length of the cylinder. During rotation, the eccentric mechanism 4 contacts the convex structure 41, guiding it to move outward away from the center of the circle.

[0047] In this embodiment, at least three protruding structures 41 can be arranged along the circumference. Each protruding structure becomes increasingly convex and thicker as it moves clockwise or counterclockwise along the circumference. The most convex portion of the structure then has an extended surface, which provides a more stable surface when contacting the inner surface of the expansion mechanism. This subsequent surface contact ensures more uniform force transmission without damaging the expansion mechanism.

[0048] During use, when the eccentric mechanism 4 rotates with the expansion mechanism in the order from the thinnest to the thickest part during spiral rotation, the expansion mechanism 5 expands outwards and tends to interfere with the outer wall of the telescopic tube to achieve locking, otherwise it will be out of interference and tend to be unlocked.

[0049] To complete the assembly of the driving member and the sliding frame, this embodiment further includes a spirally rotating screw rod 6 and a spiral hole 7. Along the axial direction, one of the spiral rod 6 and the spiral hole 7 is located at the center line of the driving member 2, and the other is located at the center line of the sliding frame 3. The assembly of the spiral rod and the spiral hole realizes a spiral connection between the driving member 2 and the center of the sliding frame 3. In this embodiment, the spiral rod 6 can be on the driving member 2 or on the sliding frame 3, and the spiral hole is located on the sliding frame 3 or the driving member 2.

[0050] In this embodiment, the driving member 2 includes an end plate 21 and a driving column 22 formed by axially extending the end plate 21. The spiral rod 6 extends from the driving column 22 in a direction away from the end plate 21. The eccentric mechanism 4 is arranged along the outer surface of the driving column 22; specifically, the outer surface of the driving column 22 located above the end plate 21 is directly raised to form an inclined convex structure 41 to achieve subsequent eccentricity.

[0051] The sliding frame 3 includes an assembly frame 32 arranged along the circumference, and an assembly seat 31 located at the end of the assembly frame 32. The assembly seat 31 is axially defined with the spiral hole 7, and the extension direction of the spiral hole 7 is consistent with the longitudinal direction of the assembly seat 31. During subsequent assembly, the expansion piece is normally located in the assembly frame 32. When interference occurs, the expansion piece is disengaged and interferes horizontally along the assembly frame.

[0052] In this embodiment, when the first telescopic rod 11 and the second telescopic rod 12 interact with each other to extend and retract, the spiral rod 6 drives the driving member 2 to move toward the spiral hole 7 in the sliding frame 3, or the sliding frame 3 drives the spiral hole 7 to move toward the spiral rod 6 in the driving member 2, and then through the interaction between the spiral rod 6 and the spiral hole 7, the driving member 2 and the spiral rod 6 are rotated in interaction with each other, and then the locking interference is completed in conjunction with the action on the expansion mechanism 5.

[0053] In order to cooperate with the expansion mechanism 5, in this embodiment, a limiting groove 33 is provided adjacent to the assembly frame, and the elastic member 52 of the expansion mechanism is used in conjunction with the limiting groove 33. At this time, the limiting groove 33 can also limit the vertical displacement of the elastic member 52, so that it can complete expansion or contraction in the horizontal direction.

[0054] When the sliding frame and the driving member interact, an auxiliary reset member 8 is disposed therebetween. This auxiliary reset member 8 facilitates relative movement between the driving member 2 and the sliding frame 3, thereby causing the eccentric mechanism 4 to radially push the expansion mechanism 5 outward during reset. In this embodiment, the auxiliary reset member 8 is a spring assembly located outside the assembly seat 32. This creates a spiral hole within the assembly seat 32. Since the outer diameter is smaller than that of the main body, this serves as the assembly location for the spring assembly.

[0055] In this embodiment, the sliding frame 4 forms a tubular cavity, which is communicated with the spiral hole 7. After the spiral rod 6 passes through the spiral hole 7, the end of the spiral rod 6 extends into the tubular cavity. The end of the spiral rod 6 is fixed to a limit plate by a screw. An auxiliary elastic member 8 is provided between the limit plate and the sliding frame. The auxiliary elastic member 8 is sleeved on the spiral rod 6, which helps the spiral rod 6 to stably retract into the tubular cavity of the sliding frame, so that the driving member has a tendency to screw into the sliding frame under the action of the auxiliary elastic member, so that the first telescopic tube 11 and the second telescopic tube 12 have a tendency to lock without being controlled by external force, that is, the expansion mechanism has a tendency to expand outward and interfere tightly with the inner surface of the second telescopic tube 12. By utilizing this trend, when the expansion mechanism 5 expands outward and interferes with the inner surface of the second telescopic tube 12, the two telescopic tubes cannot be shortened or adjusted, and the more they are contracted, the tighter they are locked. This is because when the first telescopic tube 11 and the second telescopic tube 12 are inserted, the friction force generated by the interference between the expansion mechanism 5 and the inner surface of the second telescopic tube 12 causes the driving member to move downward synchronously, thereby prompting the spiral rod to spiral into the spiral hole, so that the most protruding part of the eccentric mechanism further abuts against the inner surface of the expansion mechanism, thereby strengthening the ejection of the expansion structure.

[0056] In this embodiment, a fixing member 9 can also be provided. The fixing member 9 can be a screw. Then, a screw hole is formed on the spiral rod 6 to cooperate with the screw to enhance the locking.

[0057] The above-mentioned tendency of the expansion mechanism does not affect the relative extension and withdrawal of the telescopic tubes in the longitudinal direction. This is because, during withdrawal, the friction force generated by the interference between the expansion mechanism and the inner surface of the second telescopic tube 12 causes the expansion block 5 to be pulled outward along with the second telescopic tube 12, thereby driving the driving member away from the sliding frame, causing the spiral rod to spiral out of the spiral hole, thereby causing the most convex part of the eccentric mechanism to deviate from the expansion mechanism, causing the expansion structure to sink inward, so that the withdrawal of the two telescopic tubes in the longitudinal direction is not affected.

[0058] In this embodiment, the driver 2 is fixed to the second telescopic tube 12, while the sliding frame 3 is fixed to the first telescopic tube 11. The sliding frame's mounting base is then fixed to the end of the first telescopic tube. Both are then inserted into the second telescopic tube. A stopper sleeve is fixed to the end of the second telescopic tube. The stopper sleeve has a trimmed end that engages with multiple stoppers to prevent the first and second telescopic tubes from disengaging. Slots are provided between the stoppers to allow ventilation of the sliding frame, preventing negative pressure from forming on the sliding frame during rotation of the driver and the sliding frame, which could affect telescopic movement.

[0059] In this embodiment, the telescopic tube assembly includes several telescopic tubes, and a group of telescopic tubes is formed between adjacent first and second telescopic tubes. Then, the sliding frame can be provided with a fixed seat for inserting and fixing the telescopic tubes, and a plurality of limit bodies protruding radially outward between the fixed seat and the driving column 31. The sliding frame is inserted into the first telescopic tube 11, and a limiting end sleeve is fixed at the end of the first telescopic tube 11. The limiting end sleeve has an end edge, and the end edge is hooked with the plurality of limiting bodies to prevent adjacent telescopic tubes from disengaging.

[0060] In this embodiment, the driving member and the sliding frame form a spiral track along the telescopic tube, and the length of the spiral track formed by the spiral rotation thereof along the axial direction is equal to one third of the length of the telescopic tube 1, thereby achieving reasonable occupancy;

[0061] The adjacent telescopic tubes are first plugged in and then locked, and the length of the plugging and locking between the two is less than half of the length of the telescopic tube 1.

[0062] The distance between the upper and lower circles in the spiral trajectory, or the topspin angle when the circles are tilted upwards;

[0063] The working principle of the present invention is as follows: by sliding the driving member 12 in the second telescopic tube 12 and the sliding frame 11 fixedly provided in the first telescopic tube 11, the spiral matching relationship between the driving member 2 and the sliding frame 3, and the clockwise or counterclockwise protruding direction of the eccentric wheel, the two telescopic rods can be controlled to be allowed to be pulled out or retracted, and locked when retracting or pulling out. For example, the structural shape in this embodiment makes it possible for the locking mechanism between the two telescopic tubes to be locked and unable to be retracted, but to be extended. When extended to any position, it is locked and cannot be retracted, which is convenient for support, such as suitable for trekking poles, crutches, etc.

[0064] In this embodiment, a sliding groove can be provided on the inner wall of the second telescopic tube 12 with the sliding frame 3, so that the sliding frame 3 can move up and down along the second telescopic tube. During the movement, the spiral rod and the spiral hole contact each other, and then by rotating the first telescopic tube 11 with the driving member 2, the driving member 2 and the sliding member 3 rotate relative to each other, thereby completing locking or unlocking.

[0065] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0067] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A telescopic tube assembly comprising at least two telescopic tubes connected to each other for telescopic fit, and a locking mechanism located between the two telescopic tubes, characterized in that: The locking mechanism includes a sliding frame slidably disposed in one telescopic tube and a driving member fixedly disposed in the other telescopic tube, wherein the driving member and the sliding frame are spirally rotated along the axial direction of the telescopic tube; The sliding frame slides along the axial direction of the telescopic tube, and the resulting sliding distance is less than or equal to 150 cm; One of the driving members or the sliding frame is provided with an eccentric mechanism, and the other is provided with an expansion mechanism that cooperates with the eccentric mechanism. When the two telescopic tubes rotate relative to each other, the eccentric mechanism abuts against the inner wall of the expansion mechanism, so that its outer surface tightly interferes with the inner wall of one of the telescopic tubes, thereby completing the locking of the telescopic tubes.

2. The telescopic tube assembly according to claim 1, wherein: The expansion mechanism includes an elastic sleeve located outside the driving member. When the eccentric mechanism rotates, the elastic sleeve is forced to expand outward or return to its original position and shrink inward.

3. The telescopic tube assembly according to claim 2, wherein: The outer wall of the elastic sleeve is provided with a wear-resistant layer, the inner wall of the elastic sleeve is matched with the eccentric mechanism, and the wear-resistant layer is matched with the outer telescopic tube.

4. The telescopic tube assembly according to claim 2, wherein: The elastic sleeve comprises a connecting ring, wherein the connecting ring extends upward and / or downward to form a plurality of expansion pieces, and the connection between adjacent expansion pieces forms an elastic member.

5. The telescopic tube assembly according to claim 1, wherein: When the driving member and the sliding frame rotate helically, the eccentric mechanism deviates the movement direction of the expansion mechanism, causing it to expand outwards and interfere with the inner wall of the outer telescopic tube, or to collapse inwards and disengage from the inner wall of the outer telescopic tube.

6. The telescopic tube assembly according to claim 5, wherein: The eccentric mechanism is evenly distributed in a clockwise or counterclockwise direction on a circumferential direction with the center line of the telescopic tube as the center line, and in the circumferential direction, one end of the eccentric mechanism forms a gradually convex trend toward the other end.

7. The telescopic tube assembly according to claim 6, wherein: The gradual convexity is specifically a state in which the maximum thickness of the eccentric mechanism becomes thicker from one end to the other end.

8. The telescopic tube assembly according to claim 1, wherein: It also includes a spiral rod and a spiral hole for forming a spiral rotation. Along the axial direction, one of the spiral rod and the spiral hole is arranged at the center line of the driving member, and the other is arranged at the center line of the sliding frame.

9. The telescopic tube assembly according to claim 8, wherein: The driving member includes an end plate and a driving column formed by axially extending the end plate, the spiral rod is formed by extending the driving column away from the end plate, and the eccentric mechanism is arranged along the outer surface of the driving column; The sliding frame includes an assembly frame arranged along the circumferential direction and an assembly seat located at the end of the assembly frame. The assembly seat is axially provided with the spiral hole, and the extending direction of the spiral hole is consistent with the length direction of the assembly seat.

10. The telescopic tube assembly according to claim 1, wherein: An auxiliary reset member is provided between the driving member and the sliding frame, and the auxiliary reset member enables the driving member and the sliding frame to move relative to each other, thereby generating a tendency for the eccentric mechanism to push the expansion mechanism radially outward during reset.

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