Separated and locked telescopic pipe

Abstract

The invention discloses a separated and locked telescopic pipe which comprises a first pipe fitting, a second pipe fitting and a third pipe fitting, a first locking piece is rotatably arranged at one end of the first pipe fitting around the central axis of the first pipe fitting, and a first eccentric part is arranged on the peripheral wall of the first locking piece; the second pipe fitting is arranged outside the first pipe fitting and the first locking piece in a sleeving mode, and a first rib which extends in the length direction of the second pipe fitting and corresponds to the first eccentric part is arranged on the inner wall of the second pipe fitting in a protruding mode; the driving rod is movably arranged on the first locking piece in a penetrating mode in the length direction of the first pipe fitting and the second pipe fitting, and the driving rod is connected with a rotary knob piece rotationally arranged on the second pipe fitting; after the second pipe fitting telescopically moves in place relative to the first pipe fitting, the knob piece is driven to rotate relative to the second pipe fitting, at the moment, the first eccentric part deflects relative to the first rib to achieve the close-fitting effect, the force application position of the knob piece is separated from the position where the first pipe fitting and the second pipe fitting are locked, and operation and use are convenient; and when the knob piece rotates, other mechanisms can be linked to lock other parts.

Description

Technical Field

[0001] This invention relates to a telescopic tube with a release locking mechanism. Background Technology

[0002] Selfie sticks, tripods, and other photography equipment often use telescopic tubes. Telescopic tubes typically consist of an inner tube and an outer tube that fits over the inner tube. The inner tube can extend and retract relative to the outer tube. To achieve relative fixation between the inner and outer tubes, they are usually designed as eccentric tubes with the same cross-sectional shape but different diameters. When the inner tube rotates relative to the outer tube, the outer wall of the inner tube fits tightly against the inner wall of the outer tube.

[0003] This type of telescopic tube requires force to be applied at the connection between the inner and outer tubes to tighten and fix it, making it very inconvenient to use and impossible to perform other functions simultaneously while locking the inner and outer tubes. Moreover, during use, accidental activation or excessive load can cause relative rotation between adjacent tubes, thereby unlocking the locking relationship between the two adjacent tubes, causing the telescopic tube to shorten in length, and even causing the equipment to tip over. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a telescopic tube with a separate locking mechanism, wherein the force application position of the knob and the position for locking the first tube and the second tube are separated, which facilitates operation and use. When the knob is in motion, it can also be linked with other mechanisms to lock other components, thus expanding its other functions.

[0005] According to an embodiment of the present invention, a telescopic tube with a locking mechanism includes: a first tube, one end of which is rotatably provided with a first locking member about its central axis, the outer peripheral wall of which is provided with a first eccentric portion; a second tube, sleeved on the outside of the first tube and the first locking member, the inner wall of which is provided with a first rib extending along its length direction corresponding to the first eccentric portion; a drive rod, movably passing through the first locking member along the length direction of the first tube and the second tube, the drive rod being connected to a knob rotatably provided on the second tube; wherein, when the knob rotates relative to the second tube, it can drive the first eccentric portion to engage tightly with the first rib, thereby preventing the second tube and the first tube from moving relative to each other.

[0006] A telescopic tube with a detachable locking mechanism according to an embodiment of the present invention has at least the following beneficial effects: When adjusting the length of the telescopic tube with the above structure, after the second tube is telescopically moved into position relative to the first tube, the knob is then driven to rotate relative to the second tube. At this time, the first eccentric part on the first locking part deflects relative to the first rib to achieve a tight fit. The force application position of the knob and the locking position of the first tube and the second tube are separated, which facilitates operation and use. When the knob is rotated, it can also be linked with other mechanisms to lock other components, expanding other functions.

[0007] In some embodiments of the present invention, the first eccentric portion is a first concave arc surface provided on the outer peripheral wall of the first locking member, the radial distance from the first concave arc surface to the central axis of the first pipe gradually decreases along the first clockwise direction, a first stop step is formed between the end of the first concave arc surface with the smallest radial distance to the central axis of the first pipe and the outer peripheral wall of the first locking member, and the first rib abuts against the first concave arc surface.

[0008] In some embodiments of the present invention, a first arc guide groove is provided through the side wall of one end of the first pipe fitting, and the first locking member has a first insert shaft that is movably inserted into the first pipe fitting, and a first guide portion that reciprocates within the first arc guide groove is provided on the outer periphery of the first insert shaft.

[0009] In some embodiments of the present invention, the outer peripheral wall of the first insert shaft is provided with a second concave arc surface, the radial distance from the second concave arc surface to the central axis of the first tube gradually decreases along the first clockwise direction, a second stop step is formed between the end of the second concave arc surface with the smallest radial distance to the central axis of the first tube and the outer peripheral wall of the first insert shaft, and the inner peripheral wall of the first tube is provided with a second rib extending along its length direction, the second rib abutting against the second concave arc surface.

[0010] In some embodiments of the present invention, the first insert shaft is a hollow tube, a portion of the wall tube of the first insert shaft is a first spring sheet that can be radially elastically deformed, the first guide portion is an anti-disengagement portion formed on the outer wall of the first spring sheet to engage with the first arc guide groove, and the anti-disengagement portion can move within the first arc guide groove to limit the angle of rotation of the first locking member relative to the first tube.

[0011] In some embodiments of the present invention, a first limiting ring is provided on the outer peripheral wall of the first pipe near the first locking member, and the side wall of the first limiting ring is provided with a first limiting groove for the first rib to slide and extend only, so that the first pipe and the second pipe can only move relative to each other.

[0012] In some embodiments of the present invention, the cross-section of the drive rod is non-circular, the first locking member is provided with a first guide hole for the drive rod to slide only telescopically, and the first tube drives the first locking member to telescopically move relative to the second tube.

[0013] In some embodiments of the present invention, a third pipe extending along its length is movably inserted into the interior of the first pipe. A second locking member is rotatably provided around the central axis of the end of the third pipe extending into the first pipe. A second rib extending along its length is provided on the inner peripheral wall of the first pipe. A second eccentric portion corresponding to the second rib is provided on the outer peripheral wall of the second locking member. The driving rod is movably inserted through the second locking member. When the knob is rotated, it simultaneously drives the first eccentric portion to engage with the first rib and the second eccentric portion to engage with the second rib.

[0014] In some embodiments of the present invention, the drive rod includes a first drive tube and a second drive tube movably sleeved outside the first drive tube. The first drive tube is connected to the knob via a horizontal pin assembly. The first drive tube movably passes through the first locking member. One end of the second drive tube is fixedly connected to the first locking member, and the second drive tube movably passes through the second locking member.

[0015] In some embodiments of the present invention, the outer peripheral walls of the first pipe and the second pipe are both cylindrical surfaces.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of an embodiment of the telescopic tube of the present invention in which the length is shortened after unlocking; Figure 2 for Figure 1 A cross-sectional schematic diagram of an embodiment; Figure 3 For the present invention Figure 1 A schematic diagram of the structure locked after the extension length is achieved in the embodiment; Figure 4 for Figure 3 A cross-sectional schematic diagram of an embodiment; Figure 5 for Figure 1 A cross-sectional schematic diagram of the first locking member and the second pipe fitting in the embodiment; Figure 6 for Figure 1 Schematic diagram of the structural breakdown of the embodiment; Figure 7 for Figure 6 A partially enlarged schematic diagram of part A; Figure 8 This is a cross-sectional schematic diagram of the extended length of another embodiment of the telescopic tube with separation locking according to the present invention.

[0018] Figure label: First fitting 100; First arc guide groove 110; Second rib 120; First locking component 200; First concave arc surface 210; First stop step 220; First insert shaft 230; First spring piece 231; Anti-disengagement hook part 232; Second concave arc surface 240; Second stop step 250; First guide hole 260; Second fitting 300; First rib 310; Drive rod 400; First drive tube 410; Second drive tube 420; Knob component 500; First limiting ring 600; First limiting groove 610; Third fitting 700; Second locking component 800; Horizontal pin assembly 900. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer", indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] See Figures 1 to 5 An embodiment of the present invention provides a telescopic tube with a locking mechanism, comprising: a first tube 100, one end of which is rotatably provided with a first locking member 200 about its central axis, the outer peripheral wall of the first locking member 200 having a first eccentric portion; a second tube 300, sleeved on the outside of the first tube 100 and the first locking member 200, the inner wall of the second tube 300 having a protruding first rib 310 extending along its length direction corresponding to the first eccentric portion; a drive rod 400, movably passing through the first locking member 200 along the length direction of the first tube 100 and the second tube 300, the drive rod 400 being connected to a knob 500 rotatably disposed on the second tube 300; wherein, when the knob 500 rotates relative to the second tube 300, it can drive the first eccentric portion to engage tightly with the first rib 310, thereby preventing the second tube 300 and the first tube 100 from moving relative to each other.

[0024] When adjusting the length of the telescopic tube with the above structure, after the second tube 300 is telescopically moved into position relative to the first tube 100, the knob 500 is driven to rotate relative to the second tube 300. At this time, the first eccentric part on the first locking part 200 deflects relative to the first rib 310 to achieve a tight fit. The force application position of the knob 500 and the position for locking the first tube 100 and the second tube 300 are separate, which is convenient for operation and use. It also eliminates the need to design the cross-sectional shape of the first tube 100 and the second tube 300 to be the cross-sectional shape of the eccentric tube, thus improving design freedom. When the knob 500 rotates, it can also be linked with other mechanisms to lock other components, expanding other functions.

[0025] See Figures 5 to 7In some embodiments of the present invention, the first eccentric portion is a first concave arc surface 210 disposed on the outer peripheral wall of the first locking member 200. The radial distance from the first concave arc surface 210 to the central axis of the first tube 100 gradually decreases along a first clockwise direction. A first stop step 220 is formed between the end of the first concave arc surface 210 with the smallest radial distance to the central axis of the first tube 100 and the outer peripheral wall of the first locking member 200. The first rib 310 abuts against the first concave arc surface 210. The first clockwise direction can be clockwise or counterclockwise, and can be set according to actual needs. It is understood that as the rotation angle of the knob 500 gradually increases, the interference fit between the first concave arc surface 210 and the first rib 310 gradually increases, the locking force becomes more stable, and the process of locking and unlocking the length of the telescopic tube becomes smoother. It should be noted that when one side of the first rib 310 contacts the first stop step 220, the first rib 310 and the first concave arc surface 210 are in clearance fit, and the first pipe 100 and the second pipe 300 can freely extend and retract. Moreover, the first concave arc surface 210 also limits the range of angles in which the first locking member 200 can rotate relative to the first pipe 100.

[0026] See Figure 6 and Figure 7 In some embodiments of the present invention, in order to achieve a rotational connection between the first locking member 200 and the first tube 100, a first arcuate guide groove 110 is provided through one end of the sidewall of the first tube 100. The first locking member 200 has a first insert shaft 230 that is movably inserted into the first tube 100. The outer periphery of the first insert shaft 230 is provided with a first guide portion that reciprocates within the first arcuate guide groove 110. It can be understood that when the first guide portion moves within the first arcuate guide groove 110, it guides the rotation between the first locking member 200 and the first tube 100. At the same time, the two ends of the first arcuate guide groove 110 also limit the maximum rotation angle of the first locking member 200, avoiding excessive force and damage to the telescopic tube.

[0027] See Figure 2 and Figure 7 In some embodiments of the present invention, the outer peripheral wall of the first insert shaft 230 is provided with a second concave arc surface 240, the radial distance from the second concave arc surface 240 to the central axis of the first tube 100 gradually decreases along the first clockwise direction, a second stop step 250 is formed between the end of the second concave arc surface 240 with the smallest radial distance to the central axis of the first tube 100 and the outer peripheral wall of the first insert shaft 230, and the inner peripheral wall of the first tube 100 is provided with a second rib 120 extending along its length direction, the second rib 120 abutting against the second concave arc surface 240.

[0028] It is conceivable that relying solely on the portion of the first locking member 200 extending from the first tube 100 to press against the inner circumferential wall of the second tube 300 may result in insufficient or unstable locking force. Furthermore, since the structure at the connection between the first locking member 200 and the first tube 100 is relatively weak, it is easy for the structural strength to be insufficient after the length of the telescopic tube is locked. By adding structural features that allow the second concave arc surface 240 and the second rib 120 to cooperate, and by ensuring that the radial distances from the second concave arc surface 240 to the central axis of the first pipe fitting 100 and from the first concave arc surface 210 to the central axis of the first pipe fitting 100 gradually decrease along the first clockwise direction, when the knob 500 drives the first locking member 200 on the drive rod 400 to rotate, the first concave arc surface 210 and the first rib 310 are tightly fitted together, and the second concave arc surface 240 and the second rib 120 are tightly fitted together, so that the first locking member 200 is simultaneously locked to the first pipe fitting 100 and the second pipe fitting 300, which is beneficial to improving the locking force and stability when fixing the length dimension of the telescopic pipe.

[0029] See Figure 7 In some embodiments of the present invention, the first insert shaft 230 is a hollow tube, and a portion of the wall of the first insert shaft 230 is a first elastic piece 231 capable of radial elastic deformation. The first guide portion is an anti-disengagement hook portion 232 formed on the outer wall of the first elastic piece 231 to engage with the first arc guide groove 110. The anti-disengagement hook portion 232 can move within the first arc guide groove 110 to limit the angle of rotation of the first locking member 200 relative to the first tube 100. Specifically, the tube wall of the first insert shaft 230 has strip-shaped notches on both sides of the first elastic piece 231. When assembling the first locking member 200 with the first tube 100, the first elastic piece 231 is first deformed toward the center of the first insert shaft 230 so that the first insert shaft 230 and the anti-disengagement hook portion 232 can be inserted into the first tube 100 together. The first elastic piece 231 recovers its elastic deformation after the anti-disengagement hook portion 232 enters the first arc guide groove 110. The above structure simplifies the rotational connection between the first locking member 200 and the first tube 100, effectively reducing manufacturing costs. Generally, the first locking member 200 can be integrally injection molded from plastic material to obtain the first insert shaft 230, the first spring 231, the anti-disengagement hook 232, the first concave arc surface 210, the second concave arc surface 240, etc.

[0030] See Figure 7In some embodiments of the present invention, a first limiting ring 600 protrudes from the outer peripheral wall of the end of the first pipe 100 near the first locking member 200. The side wall of the first limiting ring 600 is provided with a first limiting groove 610 that allows the first rib 310 to slide and extend only, so that the first pipe 100 and the second pipe 300 can only move relative to each other. It should be noted that the end of the second pipe 300 away from the knob member 500 is provided with a second limiting ring opposite to the first limiting ring 600. When the first pipe 100 extends relative to the second pipe 300 to reach its maximum stroke, the first limiting ring 600 abuts against the second limiting ring, thereby preventing the first pipe 100 from completely touching the second pipe 300. More importantly, the first limiting groove 610 and the first rib 310 on the first limiting ring 600 cooperate to ensure that the first pipe 100 and the second pipe 300 can only move relative to each other and cannot rotate relative to each other. This eliminates the problem of unlocking the length of the telescopic pipe when the pipes rotate relative to each other in the traditional eccentric pipe structure. Users cannot apply external force to the first pipe 100 and the second pipe 300 to unlock them. They can only unlock and lock by rotating the knob 500, ensuring that the length of the telescopic pipe remains stable and ensuring the reliability of the equipment support.

[0031] See Figure 6 and Figure 7 In some embodiments of the present invention, the cross-section of the drive rod 400 is non-circular, and the first locking member 200 is provided with a first guide hole 260 for the drive rod 400 to slide telescopically. The first tube 100 drives the first locking member 200 to move telescopically relative to the second tube 300. In this embodiment, the cross-sectional shape of both the drive rod 400 and the first guide hole 260 is rectangular. When the first tube 100 moves telescopically relative to the second tube 300, the first locking member 200 slides along the length direction of the drive rod 400, ensuring that the first locking member 200 can be rotated relative to the second tube 300 and locked at any length position by the drive rod 400.

[0032] See Figure 8 In some embodiments of the present invention, a third pipe 700 extending along its length is movably inserted into the interior of the first pipe 100. A second locking member 800 is rotatably provided at one end of the third pipe 700 that extends into the first pipe 100 about its central axis. A second rib 120 extending along its length is provided on the inner peripheral wall of the first pipe 100. A second eccentric portion corresponding to the second rib 120 is provided on the outer peripheral wall of the second locking member 800. The driving rod 400 is movably inserted through the second locking member 800. When the knob 500 is rotated, it simultaneously drives the first eccentric portion to engage with the first rib 310 and the second eccentric portion to engage with the second rib 120.

[0033] It should be noted that when a telescopic pipe consists of multiple pipe fittings, traditional telescopic pipe structures require relative rotation near the overlapping portion of two adjacent pipe fittings. This necessitates multiple rotations for locking at different length positions, making operation very inconvenient and length adjustment inefficient. Taking a telescopic pipe composed of three pipe fittings as an example, the above structure allows for length adjustment by moving the first pipe fitting 100 relative to the second pipe fitting 300 and the third pipe fitting 700 relative to the first pipe fitting 100. Then, the knob 500 is driven to rotate relative to the second pipe fitting 300. Simultaneously, the drive rod 400 drives the first eccentric part to rotate until it is tightly fitted with the first concave surface 210 and the second eccentric part to rotate until it is tightly fitted with the second concave surface 240. In other words, rotating one knob 500 simultaneously locks or unlocks two adjacent pipe fittings, making operation very convenient and significantly improving the efficiency of adjusting the length of the telescopic pipe.

[0034] It can be imagined that when the telescopic tube is composed of four tubes, the fourth tube is movably inserted inside the third tube 700. The locking structure between the fourth tube and the third tube 700 is the same as the locking structure between the third tube 700 and the first tube 100, which will not be elaborated further here. By analogy, the locking and unlocking between all the tubes of the telescopic tube can be realized simultaneously.

[0035] See Figure 8 In some embodiments of the present invention, the drive rod 400 includes a first drive tube 410 and a second drive tube 420 movably sleeved outside the first drive tube 410. The first drive tube 410 is connected to the knob 500 through a horizontal pin assembly 900. The first drive tube 410 is movably inserted through the first locking member 200. One end of the second drive tube 420 is fixedly connected to the first locking member 200, and the second drive tube 420 is movably inserted through the second locking member 800.

[0036] It should be noted that after the relative length positions of the first pipe fitting 100 and the second pipe fitting 300, and the relative length positions of the third pipe fitting 700 and the first pipe fitting 100 are adjusted to their respective positions, the user rotates the knob 500. The knob 500 drives the first locking member 200 on the first drive tube 410 and the second locking member 800 on the second drive tube 420 to rotate together, thereby locking the first pipe fitting 100 to the second pipe fitting 300 and the third pipe fitting 700 to the first pipe fitting 100, respectively. When the knob is rotated in the opposite direction... When the knob 500 is turned, the relative angular position between the first tube 100 and the second tube 300 is restored, and the relative angular position between the third tube 700 and the first tube 100 is restored. At this time, the telescopic tube can resume its free telescopic movement. When the length of the telescopic tube is shortened, the first drive tube 410 can also retract at least partially into the interior of the second drive tube 420, so as to prevent the end of the drive rod 400 away from the knob 500 from extending out of the telescopic tube, thus ensuring that the length of the telescopic tube is shorter in the retracted state.

[0037] See Figure 6 and Figure 7 In some embodiments of the present invention, the outer peripheral walls of the first pipe 100 and the second pipe 300 are both cylindrical surfaces, so that the first pipe 100 and the second pipe 300 are not easily deformed during production and transportation.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A telescopic tube with a locking mechanism, characterized in that, include: A first pipe fitting (100) has a first locking member (200) rotatably mounted on one end of the first pipe fitting (100) around its central axis, and the outer peripheral wall of the first locking member (200) has a first eccentric part. The second pipe fitting (300) is sleeved on the outside of the first pipe fitting (100) and the first locking member (200). The inner wall of the second pipe fitting (300) is provided with a first rib (310) extending along its length direction and corresponding to the first eccentric portion. A drive rod (400) is movably inserted through the first locking member (200) along the length direction of the first pipe (100) and the second pipe (300), and the drive rod (400) is connected to a knob (500) rotatably disposed on the second pipe (300). When the knob (500) rotates relative to the second pipe (300), it can drive the first eccentric part to fit tightly with the first rib (310) to prevent the second pipe (300) and the first pipe (100) from moving relative to each other.

2. The telescopic tube with separation and locking according to claim 1, characterized in that: The first eccentric part is a first concave arc surface (210) provided on the outer peripheral wall of the first locking member (200). The radial distance from the first concave arc surface (210) to the central axis of the first tube (100) gradually decreases along the first clockwise direction. A first stop step (220) is formed between the end of the first concave arc surface (210) with the smallest radial distance to the central axis of the first tube (100) and the outer peripheral wall of the first locking member (200). The first rib (310) abuts against the first concave arc surface (210).

3. A telescopic tube with a locking mechanism according to claim 2, characterized in that: The first pipe fitting (100) has a first arc guide groove (110) through the side wall of one end. The first locking member (200) has a first insert shaft (230) that is movably inserted into the first pipe fitting (100). The outer periphery of the first insert shaft (230) is provided with a first guide portion that reciprocates within the first arc guide groove (110).

4. A telescopic tube with a separation and locking mechanism according to claim 3, characterized in that: The outer peripheral wall of the first insert shaft (230) is provided with a second concave arc surface (240). The radial distance from the second concave arc surface (240) to the central axis of the first tube (100) gradually decreases along the first clockwise direction. A second stop step (250) is formed between the end of the second concave arc surface (240) with the smallest radial distance to the central axis of the first tube (100) and the outer peripheral wall of the first insert shaft (230). The inner peripheral wall of the first tube (100) is provided with a second rib (120) extending along its length direction. The second rib (120) abuts against the second concave arc surface (240).

5. A telescopic tube with a separation and locking mechanism according to claim 3, characterized in that: The first insert shaft (230) is a hollow tube. A portion of the wall tube of the first insert shaft (230) is a first spring piece (231) that can be radially elastically deformed. The first guide portion is an anti-disengagement part (232) formed on the outer wall of the first spring piece (231) to engage with the first arc guide groove (110). The anti-disengagement part (232) can move within the first arc guide groove (110) to limit the angle of rotation of the first locking member (200) relative to the first tube (100).

6. A telescopic tube with a separation and locking mechanism according to claim 1, characterized in that: The outer peripheral wall of the first pipe fitting (100) near the first locking member (200) is provided with a first limiting ring (600). The side wall of the first limiting ring (600) is provided with a first limiting groove (610) for the first rib (310) to slide and extend only, so that the first pipe fitting (100) and the second pipe fitting (300) can only move relative to each other.

7. A telescopic tube with a separation and locking mechanism according to claim 1, characterized in that: The cross-section of the drive rod (400) is non-circular. The first locking member (200) is provided with a first guide hole (260) for the drive rod (400) to slide only in extension and retraction. The first tube (100) drives the first locking member (200) to move in extension and retraction relative to the second tube (300).

8. A telescopic tube with a separation and locking mechanism according to claim 1, characterized in that: The first pipe fitting (100) has a third pipe fitting (700) that extends along its length direction. The end of the third pipe fitting (700) that extends into the first pipe fitting (100) is provided with a second locking member (800) that rotates around its central axis. The inner peripheral wall of the first pipe fitting (100) is provided with a second rib (120) that extends along its length direction. The outer peripheral wall of the second locking member (800) is provided with a second eccentric part that corresponds to the second rib (120). The driving rod (400) is movably inserted through the second locking member (800). When the knob (500) is rotated, it simultaneously drives the first eccentric part to be tightly fitted with the first rib (310) and the second eccentric part to be tightly fitted with the second rib (120).

9. A telescopic tube with a separation and locking mechanism according to claim 8, characterized in that: The drive rod (400) includes a first drive tube (410) and a second drive tube (420) movably sleeved outside the first drive tube (410). The first drive tube (410) is connected to the knob (500) through a cross pin assembly (900). The first drive tube (410) is movably inserted through the first locking member (200). One end of the second drive tube (420) is fixedly connected to the first locking member (200), and the second drive tube (420) is movably inserted through the second locking member (800).

10. A telescopic tube with a separation and locking mechanism according to claim 1, characterized in that: The outer peripheral walls of the first pipe fitting (100) and the second pipe fitting (300) are both cylindrical.

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