Telescopic rod

Abstract

The utility model discloses a telescopic rod which comprises an outer pipe and an inner pipe connected inside the outer pipe in a sleeved mode, and the inner pipe and the outer pipe are matched in a sliding and telescopic mode in the axial direction. The limiting and locking mechanism is used for locking the outer pipe and the inner pipe, the limiting and locking mechanism comprises a sleeve, an opening ring, unlocking pieces and a locking assembly, the sleeve is fixedly connected to the outer portion of the outer pipe in a sleeving mode, the opening ring is elastic, the unlocking pieces are connected to the two ends of the opening ring, and the opening ring at least wraps the half circumference of the sleeve. Axial sliding between the outer pipe and the inner pipe is limited through a simple structure, the length of the telescopic rod is adjusted, operation is easy, unlocking can be achieved only by pressing the unlocking piece, and at the moment, the inner pipe can be retracted into the outer pipe; when the inner pipe is stretched, unlocking is not needed, the inner pipe can be directly stretched, operation is convenient and fast, automatic locking can be achieved after the inner pipe is stretched to the preset length, a large amount of time is saved, operation of operators is facilitated, and efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of telescopic devices, and in particular to a telescopic rod. Background Technology

[0002] Telescopic poles are widely used in various products, including selfie sticks, telescopic clotheslines, telescopic umbrella handles, fishing rods, mops, and telescopic electric fans. Telescopic poles are characterized by their extendable, retractable, and portable features. They can be extended to the desired length when in use and retracted to save space when not in use, making them easy to carry and store. Telescopic poles typically consist of an outer tube and an inner tube located inside the outer tube. The length of the pole is adjusted by the extension and retraction of the inner tube within the outer tube, and locked in place by a locking device to maintain the desired length. Therefore, the locking device of the telescopic pole is crucial for its proper use. Existing locking devices for telescopic poles are complex in structure, and most use threaded locking methods, employing threads and nuts or screws for fixation, resulting in complicated installation.

[0003] For example, a telescopic rod disclosed in Chinese Invention Patent (Publication No.: CN107605890A) includes an inner tube with one end extending into an outer tube; and a locking assembly. The locking assembly includes a connector and a cover. The connector includes a connecting portion and an extension rod. The connecting portion is connected to one end of the inner tube, and the extension rod extends into the outer tube. The outer circumferential surface of the extension rod is provided with an external thread portion, which is connected to the end face of the connecting portion. The major diameter of the external thread portion is consistent, and the minor diameter of the external thread portion increases from the connection point with the connecting portion towards the free end of the extension rod. The inner circumferential surface of the cover is provided with an internal thread portion to engage the external thread portion. The cross-sectional area change at the connection point between the connector and the extension rod in the locking assembly is not too rapid or too large. Therefore, the structural strength of the connector can be improved without adding auxiliary components, making the connector less prone to cracking and the locking assembly more durable, thereby effectively reducing the maintenance rate of the telescopic rod.

[0004] However, the telescopic rod disclosed in the aforementioned prior art requires several rotations to lock or unlock the outer tube and inner tube, and it cannot be automatically locked, making operation cumbersome and its performance unsatisfactory. Furthermore, the threaded connection between the thread and the nut is prone to stripping and seizing.

[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a telescopic rod that can quickly lock or unlock the outer tube and inner tube through a limiting locking mechanism, and can automatically lock after the inner tube is stretched to a predetermined length. It is easy to operate and has good performance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A telescopic rod includes an outer tube and an inner tube sleeved inside the outer tube, wherein the inner tube and the outer tube slide and telescopically cooperate along the axial direction; it also includes a limiting locking mechanism for locking the outer tube and the inner tube, the limiting locking mechanism including a sleeve, an open ring, an unlocking member, and a locking assembly, the sleeve being fixedly sleeved on the outside of the outer tube, the open ring being elastic, the unlocking member being connected to both ends of the open ring, the open ring and the unlocking member being sleeved on the outside of the sleeve and axially limitingly cooperating with the sleeve, the open ring covering at least half of the circumference of the sleeve, the unlocking member being clearance-fitted with the sleeve; the unlocking member having a protrusion at the middle of its inner wall opposite to the open ring, the outer tube having a locking hole corresponding to the protrusion, the protrusion always having a tendency to move away from the locking hole under the elastic force of the open ring, the locking assembly including a locking button and an elastic member, the locking button being locked in cooperation with the locking hole through the elastic member, the inner tube and the sleeve both having clearance holes cooperating with the locking button.

[0009] Furthermore, the locking assembly includes a mounting member fixedly disposed at the lower end of the inner tube and a mounting groove formed on the mounting member. The locking protrusion and the elastic member are both disposed inside the mounting groove, and the elastic member abuts against the bottom of the mounting groove between the locking protrusion and the groove. When the inner tube extends relative to the outer tube until the mounting groove aligns with the locking hole, the elastic member can push the locking protrusion into the locking hole to restrict the extension and retraction of the inner tube relative to the outer tube.

[0010] Furthermore, the outer tube and the inner tube are anti-rotationally coupled.

[0011] Furthermore, the unlocking component is elastic, and when the opening ring is stretched open or contracts under its own elastic force, the unlocking component moves synchronously with the opening ring.

[0012] Furthermore, each end of the open ring is provided with a hook, and each end of the unlocking member is provided with a connecting part corresponding to the hook. The unlocking member is movably connected to the open ring through the connecting part and the hook.

[0013] Furthermore, the hook portion has hook grooves on both sides, and the connecting portion includes two connecting claws disposed at the end of the unlocking member. An avoidance notch is formed between the two connecting claws to cooperate with the corresponding hook portion. The inner wall of the connecting claw is provided with a connecting post that cooperates with the hook groove.

[0014] Furthermore, the end of the connecting claw abuts against the end of the open ring.

[0015] Furthermore, the outer wall of the sleeve is provided with an annular groove along the circumference, and the opening ring and the unlocking component are both disposed in the annular groove.

[0016] Furthermore, a protective sleeve is provided between the inner tube and the outer tube, the protective sleeve is fixedly connected to the inner tube, the mounting component is provided with a first protruding edge extending outward, the sleeve is provided with a second protruding edge extending inward, and the protective sleeve is provided between the first protruding edge and the second protruding edge.

[0017] Furthermore, the inner wall of the sheath is provided with a protruding key, and the inner tube is provided with a through hole that engages with the protruding key.

[0018] The beneficial effects of this utility model after adopting the above structure are as follows:

[0019] This utility model discloses a telescopic rod, comprising an outer tube and an inner tube sleeved inside the outer tube, wherein the inner tube and the outer tube slide and telescopically cooperate along the axial direction; it also includes a limiting locking mechanism for locking the outer tube and the inner tube, the limiting locking mechanism comprising a sleeve, an open ring, an unlocking element, and a locking assembly. Specifically, when the telescopic rod needs to be retracted, the outer tube is held and pressure is applied to the unlocking element towards the locking hole. The unlocking element moves towards the locking hole, causing the locking protrusion to disengage from the locking hole, releasing the restriction on the inner tube, thereby allowing the inner tube to retract relative to the outer tube. At this time, the operator can retract the inner tube to adjust the length of the telescopic rod. When the telescopic rod needs to be extended, the outer tube is held and the inner tube is extended. The locking protrusion moves towards the locking hole under the action of the elastic element. When the inner tube extends relative to the outer tube until the mounting groove aligns with the locking hole, the locking protrusion will automatically engage into the locking hole, thereby locking the outer tube and the inner tube. In summary, the telescopic rod of this application utilizes a simple structure to restrict axial sliding between the outer and inner tubes, thereby adjusting the length of the telescopic rod. It is easy to operate; simply pressing the unlocking component unlocks the rod, allowing the inner tube to retract into the outer tube. During extension, no unlocking is required; the inner tube can be extended directly, making operation convenient and quick. Furthermore, it automatically locks after the inner tube has been extended to the predetermined length, saving considerable time, facilitating operator work, and improving efficiency. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a longitudinal sectional view of the overall structure of this utility model;

[0022] Figure 2 This is the utility model Figure 1 Enlarged schematic diagram of the structure at point A;

[0023] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0024] Figure 4 This is an exploded view of the overall structure of this utility model;

[0025] Figure 5 This is the utility model Figure 4 Enlarged schematic diagram of the structure at point B;

[0026] Figure 6 This is a three-dimensional schematic diagram of the sleeve, open ring, and unlocking component of this utility model;

[0027] Figure 7 This is a schematic diagram showing the connection between the opening ring and the unlocking component of this utility model.

[0028] Figure 8 This is a three-dimensional schematic diagram of the sheath of this utility model;

[0029] Figure 9 This is a three-dimensional schematic diagram of the outer tube, inner tube, and extension tube of this utility model.

[0030] Figures 1 to 9 The winning number is:

[0031] 1. Outer tube; 11. Locking hole; 2. Inner tube; 21. Clearance hole; 22. Through hole; 3. Limiting locking mechanism; 31. Sleeve; 311. Ring groove; 312. Second protruding edge; 313. Arc-shaped protrusion; 32. Opening ring; 321. Hook; 3211. Hook groove; 33. Unlocking component; 331. Protruding post; 3311. Arc-shaped edge; 332. Connecting part; 3321. Connecting claw; 3322. Clearance notch; 3323. Connecting post; 34. Locking assembly; 341. Locking protruding button; 342. Mounting component; 3421. First protruding edge; 343. Mounting groove; 344. Elastic component; 4. Protective sleeve; 41. Protruding key; 5. Extension tube; 6. Locking mechanism; 7. Guide groove; 8. Connecting component. Detailed Implementation

[0032] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0033] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms 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 utility model 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 limitations on this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0038] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] like Figures 1 to 9As shown, a telescopic rod includes an outer tube 1 and an inner tube 2 sleeved inside the outer tube 1, wherein the inner tube 2 and the outer tube 1 slide and telescopically cooperate axially; it also includes a limiting locking mechanism 3 for locking the outer tube 1 and the inner tube 2, the limiting locking mechanism 3 including a sleeve 31, an open ring 32, an unlocking member 33 and a locking assembly 34, the sleeve 31 being fixedly sleeved on the outside of the outer tube 1, the open ring 32 being elastic, the unlocking member 33 being connected to both ends of the open ring 32, the open ring 32 and the unlocking member 33 both being sleeved on the outside of the sleeve 31 and axially limitingly cooperating with the sleeve 31, the open ring 32 at least covering the sleeve 31. The unlocking component 33 and the sleeve 31 are in clearance fit at half the circumference of the sleeve 31; the unlocking component 33 has a protrusion 331 in the middle of its inner wall that is opposite to the opening ring 32; the outer tube 1 has a locking hole 11 that corresponds to the protrusion 331; the protrusion 331 always tends to move away from the locking hole 11 under the elastic force of the opening ring 32; the locking assembly 34 includes a locking button 341 and an elastic element 344; the locking button 341 is locked in place with the locking hole 11 through the elastic element 344; both the inner tube 2 and the sleeve 31 have clearance holes 21 that cooperate with the locking button 341. When an external force is applied to the unlocking member 33 in the direction of the locking hole 11, the protrusion 331 moves towards the locking hole 11 along with the unlocking member 33. The protrusion 331 acts on the locking button 341, causing the locking button 341 to disengage from the locking hole 11, thereby allowing the inner tube 2 to extend and retract relative to the outer tube 1. When the external force is released, the opening ring 32 contracts under its own elastic force and drives the protrusion 331 to move away from the locking hole 11. The unlocking member 33 is elastic; when the opening ring 32 is opened or contracts under its own elastic force, the unlocking member 33 moves synchronously with the opening ring 32. The two ends of the opening ring 32 are respectively provided with hooks 321, and the two ends of the unlocking member 33 are respectively provided with connecting parts 332 corresponding to the hooks 321. The unlocking member 33 is movably connected to the opening ring 32 through the connecting parts 332 and the hooks 321. The hook portion 321 has hook grooves 3211 on both sides. The connecting portion 332 includes two connecting claws 3321 disposed at the end of the unlocking member 33. An avoidance notch 3322 is formed between the two connecting claws 3321 to cooperate with the corresponding hook portion 321. The inner wall of the connecting claw 3321 is provided with a connecting post 3323 that cooperates with the hook groove 3211. The outer wall of the sleeve 31 is provided with an annular groove 311 along the circumference. The open ring 32 and the unlocking member 33 are both disposed in the annular groove 311. The end of the connecting claw 3321 abuts against the end of the open ring 32.

[0040] Based on the above embodiments, the present invention aims to provide a telescopic rod, including an outer tube 1 and an inner tube 2 sleeved inside the outer tube 1, wherein the inner tube 2 and the outer tube 1 slide and telescopically cooperate along the axial direction; it also includes a limiting locking mechanism 3 for locking the outer tube 1 and the inner tube 2, the limiting locking mechanism 3 including a sleeve 31, an open ring 32, an unlocking member 33, and a locking assembly 34. Specifically, when the telescopic rod needs to be retracted, the outer tube 1 is held and an external force is applied to the unlocking member 33 in the direction close to the locking hole 11. The unlocking member 33 moves in the direction close to the locking hole 11, so that the locking protrusion 341 disengages from the locking hole 11, releasing the restriction on the inner tube 2, thereby allowing the inner tube 2 to retract relative to the outer tube 1. At this time, the operator can retract the inner tube 2 to adjust the length of the telescopic rod. When the telescopic rod needs to be stretched, hold the outer tube 1 and stretch the inner tube 2. Under the action of the elastic element 344, the locking protrusion 341 moves towards the locking hole 11. When the inner tube 2 extends relative to the outer tube 1 until the mounting groove 343 aligns with the locking hole 11, the locking protrusion 341 will automatically engage in the locking hole 11, thereby locking the outer tube 1 and the inner tube 2. In summary, the telescopic rod of this application uses a simple structure to limit the axial sliding between the outer tube 1 and the inner tube 2, thereby adjusting the length of the telescopic rod. It is easy to operate; simply press the unlocking element 33 to unlock it, at which point the inner tube 2 can be retracted into the outer tube 1. When stretching, there is no need to unlock; simply stretch the inner tube 2 directly. The operation is convenient and quick, and it can automatically lock after the inner tube 2 is stretched to the predetermined length, saving a lot of time, facilitating the operator's operation, and improving efficiency.

[0041] In this embodiment, as Figure 7 As shown, the protruding post 331 is provided with multiple protruding ribs, and each protruding rib is provided with an arc-shaped edge 3311. The arc-shaped edge 3311 serves as a guide, facilitating the protruding post 331 to engage or disengage from the locking hole 11. In other preferred embodiments, the locking hole 11 can be provided with multiple holes, thus enabling multiple length adjustments to the telescopic rod. For clarity, in this embodiment, the locking hole 11 is provided as one.

[0042] In this embodiment, as Figure 6As shown, the opening end of the groove 3211 is located inside the hook portion 321, meaning the groove 3211 extends from the inside out. When an external force is applied to the unlocking member 33 in the direction of approaching the locking hole 11, the unlocking member 33 transmits the external force to the opening ring 32 through the end of the connecting claw 3321 and the connecting post 3323. The external force transmitted from the connecting post 3323 generates two component forces under the guidance of the groove 3211. One component force causes the opening ring 32 to move away from the inner tube 2, and the other component force causes the opening of the opening ring 32 to move towards a larger opening. In this embodiment, the end of the connecting claw 3321 abuts against the end of the opening ring 32. By transmitting force to the opening ring 32 through the end of the connecting claw 3321, this structural design reduces the stress on the connecting post 3323, thereby improving the service life of the unlocking member 33.

[0043] In this embodiment, as Figure 6 As shown, the outer wall of the sleeve 31 is provided with an annular groove 311 along the circumference, and the open ring 32 and the unlocking member 33 are both disposed within the annular groove 311. The annular groove 311 enables the open ring 32 and the unlocking member 33 to be axially limited and engaged with the sleeve 31. In a further embodiment, the annular groove 311 includes an open annular groove for placing the open ring 32 and an unlocking member groove for placing the unlocking member 33. The width of the unlocking member groove is wider than that of the open annular groove. This structural design prevents the open ring 32 and the unlocking member 33 from rotating circumferentially along the sleeve 31.

[0044] As another preferred embodiment of this utility model, the locking assembly 34 includes a mounting member 342 fixedly disposed at the lower end of the inner tube 2 and a mounting groove 343 formed on the mounting member 342. The locking protrusion 341 and the elastic member 344 are both disposed inside the mounting groove 343, and the elastic member 344 abuts against the bottom of the mounting groove 343. When the inner tube 2 extends relative to the outer tube 1 until the mounting groove 343 aligns with the locking hole 11, the elastic member 344 can push the locking protrusion 341 into the locking hole 11 to restrict the extension and retraction of the inner tube 2 relative to the outer tube 1. In this embodiment, as... Figure 2 and Figure 5 As shown, the telescopic rod is extended and retracted through the limiting locking mechanism 3, facilitating the extension of the rod to the desired length and making it easy to shorten and store. In this embodiment, the head of the locking protrusion 341 is a spherical structure. The spherical structure design allows the locking protrusion 341 to automatically retract when blocked by the sleeve 31. When it is necessary to extend the inner tube 2, there is no need to unlock it; the inner tube 2 can be extended directly. When the inner tube 2 extends relative to the outer tube 1 until the mounting groove 343 is aligned with the locking hole 11, the elastic element 344 can push the locking protrusion 341 into the locking hole 11 to limit the retraction of the inner tube 2 relative to the outer tube 1. In this embodiment, the mounting groove 343 is provided to prevent the elastic element 344 from shifting during compression and extension.

[0045] In another preferred embodiment of this utility model, the outer tube 1 and the inner tube 2 are fitted with an anti-rotation mechanism. This anti-rotation design prevents relative circumferential rotation between the inner tube 2 and the outer tube 1, thereby avoiding misalignment of the holes and ensuring the adjustment of the telescopic rod. In this embodiment, the outer tube 1 and the inner tube 2 are each provided with a guide groove 7 extending axially along their respective sides for guiding telescopic movement. Figure 9 As shown, the guide groove 7 not only guides the relative movement between the rods, but its design also prevents rotation between the rods, significantly improving the support stability of the telescopic rod. Figure 6 As shown, the inner wall of the sleeve 31 is provided with an arc-shaped protrusion 313 that is adapted to the guide groove 7. The arc-shaped protrusion 313 cooperates with the guide groove 7 to achieve anti-rotation cooperation between the sleeve 31 and the outer tube 1.

[0046] In another preferred embodiment of this utility model, a sheath 4 is provided between the inner tube 2 and the outer tube 1, and the sheath 4 is fixedly connected to the inner tube 2. The mounting member 342 is provided with an outwardly extending first protruding edge 3421, and the sleeve 31 is provided with an inwardly extending second protruding edge 312. The sheath 4 is disposed between the first protruding edge 3421 and the second protruding edge 312. The inner wall of the sheath 4 is provided with a protruding key 41, and the inner tube 2 is provided with a through hole 22 that engages with the protruding key 41. In this embodiment, as... Figure 5 , Figure 8 As shown, the sheath 4 is positioned between the first protruding edge 3421 and the second protruding edge 312 to prevent the inner tube 2 from detaching from the outer tube 1 due to excessive force when stretching the inner tube 2. The protruding key 41 engages with the through hole 22 to restrict the sheath 4 from moving circumferentially along the inner tube 2.

[0047] As another preferred embodiment of this utility model, it further includes an extension tube 5, which is sleeved inside the inner tube 2 and slides and extends axially with the inner tube 2. A locking mechanism 6 is provided between the inner tube 2 and the extension tube 5 to lock the inner tube 2 and the extension tube 5. A third connecting member 8 is fixedly connected to the upper end of the extension tube 5. In this embodiment, as... Figure 1 As shown, the limit locking mechanism 3 and the locking mechanism 6 enable multi-stage extension and retraction of the telescopic rod, facilitating its extension to the desired length and its subsequent shortening for storage. In this embodiment, as... Figure 1 As shown, the third connector 8 allows for the connection of the telescopic rod with items such as mops, increasing the practicality of the telescopic rod.

[0048] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A telescopic rod, comprising an outer tube (1) and an inner tube (2) sleeved inside the outer tube (1), wherein the inner tube (2) and the outer tube (1) are axially slidingly telescopically coupled; further comprising a limiting locking mechanism (3) for locking the outer tube (1) and the inner tube (2), characterized in that: The limiting locking mechanism (3) includes a sleeve (31), an open ring (32), an unlocking component (33), and a locking assembly (34). The sleeve (31) is fixedly sleeved on the outside of the outer tube (1). The open ring (32) is elastic. The unlocking component (33) is connected to both ends of the open ring (32). The open ring (32) and the unlocking component (33) are both sleeved on the outside of the sleeve (31) and are axially limited to the sleeve (31). The open ring (32) covers at least half of the circumference of the sleeve (31). The unlocking component (33) is clearance-fitted with the sleeve (31). The inner wall of the unlocking component (33) is provided with a protrusion (331) that is opposite to the opening ring (32) in the middle. The outer tube (1) is provided with a locking hole (11) that is corresponding to the protrusion (331). Under the elastic force of the opening ring (32), the protrusion (331) always tends to move away from the locking hole (11). The locking assembly (34) includes a locking button (341) and an elastic element (344). The locking button (341) is locked to the locking hole (11) through the elastic element (344). The inner tube (2) and the sleeve (31) are both provided with clearance holes (21) that cooperate with the locking button (341).

2. A telescopic rod according to claim 1, characterized in that: The locking assembly (34) includes a mounting piece (342) fixedly disposed at the lower end of the inner tube (2) and a mounting groove (343) opened on the mounting piece (342). The locking protrusion (341) and the elastic member (344) are both disposed inside the mounting groove (343), and the elastic member (344) abuts against the bottom of the mounting groove (343) between the locking protrusion (341) and the mounting groove (343). When the inner tube (2) extends relative to the outer tube (1) to the mounting groove (343) and aligns with the locking hole (11), the elastic member (344) can push the locking protrusion (341) into the locking hole (11) to limit the extension and retraction of the inner tube (2) relative to the outer tube (1).

3. A telescopic rod according to claim 1, characterized in that: The outer tube (1) and the inner tube (2) are anti-rotation fitted together.

4. A telescopic rod according to claim 1, characterized in that: The unlocking member (33) is elastic. When the opening ring (32) is opened or contracted under its own elastic force, the unlocking member (33) moves synchronously with the opening ring (32).

5. A telescopic rod according to claim 1 or 4, characterized in that: The two ends of the open ring (32) are respectively provided with hooks (321), and the two ends of the unlocking member (33) are respectively provided with connecting parts (332) corresponding to the hooks (321). The unlocking member (33) is movably connected to the open ring (32) through the connecting parts (332) and the hooks (321).

6. A telescopic rod according to claim 5, characterized in that: The hook (321) has hook grooves (3211) on both sides. The connecting part (332) includes two connecting claws (3321) at the end of the unlocking member (33). A clearance notch (3322) is formed between the two connecting claws (3321) to cooperate with the corresponding hook (321). The inner wall of the connecting claw (3321) is provided with a connecting post (3323) that cooperates with the hook groove (3211).

7. A telescopic rod according to claim 6, characterized in that: The end of the connecting claw (3321) abuts against the end of the open ring (32).

8. A telescopic rod according to claim 1, characterized in that: The outer wall of the sleeve (31) is provided with an annular groove (311) along the circumferential direction, and the opening ring (32) and the unlocking member (33) are both provided in the annular groove (311).

9. A telescopic rod according to claim 2, characterized in that: A sheath (4) is provided between the inner tube (2) and the outer tube (1). The sheath (4) is fixedly connected to the inner tube (2). The mounting component (342) is provided with a first protruding edge (3421) extending outward. The sleeve (31) is provided with a second protruding edge (312) extending inward. The sheath (4) is provided between the first protruding edge (3421) and the second protruding edge (312).

10. A telescopic rod according to claim 9, characterized in that: The inner wall of the sheath (4) is provided with a protruding key (41), and the inner tube (2) is provided with a through hole (22) that engages with the protruding key (41).

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