telescopic rod

Abstract

The application discloses a telescopic rod, which comprises an inner tube and an outer tube coaxially sleeved outside the inner tube, a locking mechanism is arranged at one end of the inner tube in the outer tube, and first and second bases for abutting are arranged at opposite ends of the inner tube and the outer tube respectively, wherein a boosting mechanism is arranged between the first base and the end of the inner tube. The telescopic rod can adjust the length by telescoping and can be stably supported between two wall surfaces by the boosting mechanism.

Description

Technical Field

[0001] This invention relates to the field of telescopic pole technology, and in particular to a telescopic pole. Background Technology

[0002] Manual telescopic rods have a wide range of applications, such as curtain rods, door curtain rods, and shower curtain rods. Two rod-shaped components are interlocked and slide relative to each other. A locking mechanism is provided between the two rod-shaped components. When the two rod-shaped components extend or retract, they are locked by the locking mechanism, thus realizing the telescopic function of the rod. Currently, telescopic rods on the market tighten to the wall by rotating the bases at both ends after extension or retraction. However, this type of telescopic rod structure requires placing the two bases on two walls first, and then rotating the tube. Especially when the tension increases, continuing to rotate the tube will interfere with the tube, causing the bases to deviate. This results in the telescopic rod constantly resetting and rotating, making operation very inconvenient. Therefore, there is an urgent need for a telescopic rod that integrates both extension and tightening functions and is easy to operate. Summary of the Invention

[0003] The purpose of this invention is to design a telescopic rod to overcome the shortcomings of the above-mentioned technology.

[0004] This invention designs a telescopic rod, comprising an inner tube and an outer tube coaxially sleeved outside the inner tube. The inner tube has a locking mechanism at one end inside the outer tube. The locking mechanism includes an elastic locking part, a guide post, a rigid elastic element, a traction rope, and a seat. The seat is fixedly connected to the inner wall of the inner tube and has a through hole coaxial with the inner tube. The guide post is sleeved within the through hole and can reciprocate axially. The rigid elastic element is sleeved on the guide post and located between the end of the guide post facing the outer tube and the seat. The elastic locking part connects... At the end of the guide post facing the outer tube, static friction is formed between the elastic locking part and the inner wall of the outer tube. One end of the traction rope is connected to the guide post or the elastic locking part. When the elastic locking part is in the normal state, static friction is formed between the elastic locking part and the inner wall of the outer tube, so that the inner tube and the outer tube are in a locked state. When the guide post or the elastic locking part is pulled by the traction rope, the elastic locking part deforms and releases the static friction between it and the inner wall of the outer tube, so that the inner tube and the outer tube are in an unlocked state. At this time, the inner tube and the outer tube can slide relative to each other axially. The inner tube and outer tube are respectively provided with a first base and a second base for abutting against each other at opposite ends. A pressure boosting mechanism is provided between the first base and the end of the inner tube. The pressure boosting mechanism includes a movable head and a transmission structure. The movable head and the transmission structure are connected. The movable head is slidably connected in the first base. The transmission structure drives the movable head to slide back and forth in the first base. One end of the movable head abuts against the end of the inner tube. The other end of the traction rope is connected to the movable head. When the movable head slides in the direction of the inner tube and pushes the inner tube, the inner tube compresses the rigid elastic element through the seat body. The reaction of the rigid elastic element pushes the base, so that the inner tube and the outer tube are in a tensioned state.

[0005] Preferably, the elastic locking part includes an elastic body, which includes a base and a plurality of elastic pieces spaced apart around the base. The base is connected to the end of the guide post. The traction rope passes through the base and the guide post and is connected to the base. The elastic pieces are arranged radially around the base.

[0006] Further optimization involves making the elastic sheet a metal sheet with elastic deformation capability.

[0007] In a further optimization, the elastic locking part also includes a guide tube with an axial through hole. The guide tube is axially connected to the end of the guide post. The base of the elastic body is connected between the guide tube and the guide post. One end of the traction rope passes through the axial through hole of the guide post and the guide tube to form several folded-back segments. The several folded-back segments are connected one-to-one to each elastic plate of the elastic body, so that when the traction rope pulls the folded-back segments, the folded-back segments pull the elastic plates, so that all the elastic plates retract synchronously.

[0008] In a further optimization, the elastic locking part also includes a pusher, which is connected to or abuts against the end of the guide post facing the outer tube. A through hole is provided in the center of the pusher, and a connector is movably connected in the through hole. One end of the connector passes through the through hole and is connected to the base, and the other end of the connector is movably connected to a drive member. One end of the traction rope passes through the guide post and is connected to the drive member. The other side of the drive member relative to the connection point of the traction rope abuts against the connector.

[0009] Preferably, the transmission structure includes a wrench, a first connecting rod, a second connecting rod, and a third connecting rod. The wrench is hinged to a first base, the first connecting rod is also hinged to the first base, the second connecting rod is hinged between the first connecting rod and the wrench, one end of the third connecting rod is integrated and hinged to the first and second connecting rods, and the other end of the third connecting rod is hinged to a movable head.

[0010] Preferably, the transmission structure includes a wrench, a fourth link, a fifth link, and a sixth link. One end of the fourth link is hinged to the first base, and the other end of the fourth link is fixedly connected to the wrench. One end of the fifth link is hinged to the wrench, and the other end of the fifth link is hinged to the sixth link. One end of the sixth link is hinged to the fifth link, and the other end is hinged to the movable head.

[0011] The technical advantages of this invention are as follows: the inner and outer tubes are nested together. The inner tube is equipped with a locking mechanism, which includes an abutment block, a guide post, a rigid elastic element, and a seat. The abutment block is fixed to the inner wall of the inner tube, the guide post is axially slidably connected to the abutment block, and the seat is fixed to one end of the guide post, located outside the inner tube. The rigid elastic element is sleeved on the guide post and its two ends abut against the abutment block and the seat, allowing the locking mechanism to slide with the inner tube. The inner and outer tubes are locked together by the locking mechanism. The opposite ends of the inner and outer tubes are respectively provided with a first base and a second base for abutting against the wall. The first base is equipped with a pressurizing mechanism, which allows the inner and outer tubes to form a tensioned state after locking together, thereby stably supporting them between the two walls. The trigger is connected to a traction element. The traction rope has one end connected to the trigger and the other end passing through the seat and extending axially along the inner tube to the movable head of the pressurizing mechanism. By swinging the movable head, the traction rope is pulled, thereby pulling the elastic locking part, causing the elastic locking part to deform and close. In the initial state, the elastic locking part forms static friction with the inner wall of the outer tube, so that the inner tube and the outer tube are locked. When the movable head is swinged and the traction rope is pulled, the traction rope pulls the elastic locking part to deform and close, and the inner tube and the outer tube are unlocked. At this time, the inner tube and the outer tube can slide relative to each other to achieve the purpose of adjusting the length. After adjusting the preset length, the traction rope can be released, and the elastic locking part returns to forming static friction with the inner wall of the outer tube. Therefore, the telescopic rod of the present invention can not only adjust the length by telescoping, but also be stably supported between two walls by the pressurizing mechanism. Attached Figure Description

[0012] Figure 1 It is a three-dimensional diagram of the overall structure.

[0013] Figure 2 This is a cross-sectional view of the overall structure of Embodiment 1.

[0014] Figure 3 This is a partial structural cross-sectional view of Embodiment 1.

[0015] Figure 4 This is a partial structural cross-sectional view of Embodiment 2.

[0016] Figure 5 This is a partial structural cross-sectional view of Embodiment 3.

[0017] Figure 6 This is a structural diagram of an elastomer.

[0018] Figure 7 a is a three-dimensional view of the first base with the first type of transmission structure (when the wrench is in the upper position).

[0019] Figure 7 b is a three-dimensional view of the first base with the first type of transmission structure (when the wrench is swinging down).

[0020] Figure 8 a is an internal structural diagram of the first base with the first type of transmission structure (when the wrench is raised).

[0021] Figure 8 b is a diagram of the internal structure of the first base with the first type of transmission structure (when the wrench is swinging down).

[0022] Figure 9 a is a cross-sectional view of the first base structure with the first type of transmission structure (when the wrench is raised).

[0023] Figure 9 b is a cross-sectional view of the first base structure with the first type of transmission structure (when the wrench is swinging down).

[0024] Figure 10 This is a diagram of the internal structure of the first base with the second type of transmission structure (when the wrench is swinging down).

[0025] Figure 11 This is a cross-sectional view of the first base structure with a second type of transmission structure (when the wrench is swinging down).

[0026] In the diagram: 1. Inner tube; 2. Outer tube; 3. Elastic locking part; 31. Elastic body; 311. Base; 312. Elastic sheet; 32. Pushing component; 33. Guide tube; 331. Axial through hole; 34. Connecting component; 35. Driving component; 36. Abutting component; 361. Through hole; 4. Guide post; 41. Forked end; 5. Rigid elastic component; 6. Traction rope; 61. Fold-back segment; 7. Seat body; 8. Through hole; 9. First base; 10. Second base; 11. Moving head; 12. Wrench; 13. First connecting rod; 14. Second connecting rod; 15. Third connecting rod; 16. Fourth connecting rod; 17. Fifth connecting rod; 18. Sixth connecting rod; 19. Insertion hole. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0028] Example 1 This invention includes an inner tube 1 and an outer tube 2 coaxially sleeved outside the inner tube 1. The inner tube 1 and the outer tube 2 can slide relative to each other. A locking mechanism is provided at the end of the inner tube 1 located inside the outer tube 2. The locking mechanism is used to lock or unlock the inner tube 1 and the outer tube 2. When the locking mechanism is in the unlocked state, the inner tube 1 and the outer tube 2 can slide relative to each other, thereby realizing length adjustment. When the locking mechanism is in the locked state, the inner tube 1 and the outer tube 2 are locked together. The locking mechanism includes an elastic locking part 3, a guide post 4, a rigid elastic element 5, a traction rope 6, and a seat 7. The seat 7 is fixedly connected to the inner wall of the inner tube 1 or is designed as an integral part of the inner wall of the inner tube 1. A through hole 8 coaxial with the inner tube 1 is opened on the seat 7. The guide post 4 is movably sleeved in the through hole 8, so the guide post 4 can move axially back and forth along the through hole 8. The rigid elastic element 5 is sleeved on the guide post 4 and located between the end of the guide post 4 facing the outer tube 2 and the seat 7. The end of column 4 facing the outer tube 2 is the top of guide column 4. The elastic locking part 3 is movably sleeved on the top of guide column 4. In order to avoid one end of rigid elastic element 5 directly abutting the elastic locking part 3, one end of elastic locking part 3 is provided with a pusher 32. One end of rigid elastic element 5 abuts against the seat 7, and the other end of rigid elastic element 5 abuts against the pusher 32, so that when elastic locking part 3 slides along guide column 4, it can compress rigid elastic element 5 through pusher 32. Rigid elastic element 5 is usually a spring. Elastic locking part 3 is fixedly connected to the end face of guide column 4 facing the outer tube 2. Static friction is formed between elastic locking part 3 and inner wall of outer tube 2. In the normal state, elastic locking part 3 is tightly pressed against inner wall of outer tube 2, thereby forming static friction with inner wall of outer tube 2 and locking with outer tube 2. In the normal locked state, inner tube 1 and outer tube 2 are not completely locked, because inner tube 1 and outer tube 2 need to be sleeved and installed.

[0029] When the elastic locking part 3 is deformed under pressure, it separates from the inner wall of the outer tube 2 and no longer abuts against the inner wall of the outer tube 2, thus unlocking it from the outer tube 2. At this time, the outer tube 2 and the inner tube 1 can slide relative to each other axially, that is, adjust the length.

[0030] One end of the traction rope 6 is connected to the guide post 4 or the elastic locking part 3. When the traction rope 6 is not pulled, the elastic locking part 3 is in the normal state. When the guide post 4 or the elastic locking part 3 is pulled by the traction rope 6, the elastic locking part 3 is deformed, thereby making the inner tube 1 and the outer tube 2 in the unlocked state.

[0031] When the outer tube 2 rotates or moves axially, it drives the first elastic body 31 to rotate or move axially. That is, the outer tube 2 and the first elastic body 31 move synchronously. When the inner tube 1 and the outer tube 2 are driven to rotate relative to each other, the first elastic body 31 moves towards the end face of the insertion end under the action of static friction. After the first elastic body 31 contacts the end face of the insertion end, it continues to move, causing the first elastic body 31 to be squeezed against the end face of the insertion end. The first elastic body 31 undergoes elastic deformation, causing the outer peripheral wall of the first elastic body 31 to press tightly against the inner wall of the outer tube 2. That is, the outer peripheral wall of the first elastic body 31 and the inner wall of the outer tube 2 form a tight fit, so that the inner tube 1 and the outer tube 2 are locked together. At this time, the inner tube 1 and the outer tube 2 usually do not have relative axial displacement, so that the distance between the outer end of the inner tube 1 and the outer end of the outer tube 2 can be adjusted to adjust the length of the telescopic rod.

[0032] In this embodiment, the elastic locking part 3 includes an elastic body 31. The elastic body 31 includes a base 311 and a plurality of elastic pieces 312 spaced around the base 311. That is, the base 311 has a ring structure and is connected to the end of the guide post 4. Each elastic piece 312 is inclined outward relative to the base 311. One end of the elastic piece 312 is connected to the base 311 and the other end is suspended. The plurality of elastic pieces 312 surround to form a bowl-shaped elastic body 31. When the elastic body 31 is compressed and undergoes elastic deformation, the suspended end of the elastic piece 312 will open outward and press against the inner wall of the outer tube 2, so that the end of the elastic piece 312 facing the inner wall of the outer tube 2 forms a tight fit and locks with the inner wall of the outer tube 2.

[0033] In this embodiment, the top end of the guide post 4 is provided with an axial sliding groove, so that the top part of the guide post 4 forms a forked end 41. The base 311 has two parallel holes. The forked end 41 is inserted into the parallel holes, so that the base 311 can reciprocate along the forked end 41, thereby realizing that the elastic locking part 3 is movably sleeved on the top end of the guide post 4. One end of the traction rope 6 passes through the guide post 4 and enters the sliding groove to connect to the base 311, so that the traction rope 6 can pull the base 311. Both the guide post 4 and the base 7 have holes for the traction rope 6 to pass through. After passing through the holes in the base 7 and the guide post 4, the traction rope 6 is connected to the base 311. By pulling the traction rope 6, the elastic piece 312 is pulled, causing the elastic body 31 to move in the direction of the traction rope 6. At this time, the elastic piece 312 will abut against the end of the inner tube 1. As the traction rope 6 continues to pull the elastic body 31, the elastic piece 312 continues to move. Under the obstruction of the end of the inner tube 1, the elastic piece 312 will deform and shrink, separating from the inner wall of the outer tube 2, thereby unlocking the outer tube 2 and the inner tube 1.

[0034] Furthermore, the elastic sheet 312 is a metal sheet with elastic deformation capability, and the material can be steel, alloy, etc.

[0035] The inner tube 1 and the outer tube 2 are respectively provided with a first base 9 and a second base 10 at opposite ends. The inner tube 1 and the outer tube 2 are respectively connected to the opposite surfaces of the first base 9 and the second base 10. The outward-facing surfaces of the first base 9 and the second base 10 abut against the wall or cabinet surface, so that the telescopic rod formed by the inner tube 1, the outer tube 2, the first base 9 and the second base 10 is supported between the two wall or cabinet surfaces.

[0036] The first base 9 and the second base 10 are both provided with insertion holes 19 for inserting the ends of the inner tube 1 and the outer tube 2. The inner tube 1 and the outer tube 2 can be round tubes or square tubes.

[0037] A pressurizing mechanism is provided between the first base 9 and the end of the inner tube 1. The pressurizing mechanism includes a movable head 11 and a transmission structure. The movable head 11 and the transmission structure are connected. The movable head 11 is slidably connected in the first base 9. The transmission structure drives the movable head 11 to slide back and forth in the first base 9. One end of the movable head 11 abuts against the end of the inner tube 1. When the movable head 11 slides in the direction of the inner tube 1 and pushes the inner tube 1, the inner tube 1 compresses the rigid elastic element 5 through the abutment block. The reaction of the rigid elastic element 5 pushes the abutment block, so that the inner tube 1 and the outer tube 2 are in a tensile state.

[0038] One end of the traction rope 6 extends to the inner tube 1 and connects to the movable head 11 to form a linkage. That is, one end of the traction rope 6 is connected to the movable head 11, and one end of the inner tube 1 abuts against the movable head 11. When the wrench 12 swings upward, the wrench 12 moves the movable head 11 backward through the transmission structure. At this time, the movable head 11 pulls the traction rope 6, causing the traction rope 6 to tighten and pull the trigger, thereby causing the elastic locking part 3 to deform and retract. When the wrench 12 swings downward, the wrench 12 moves the movable head 11 forward through the transmission structure, thereby pushing... The inner tube 1 moves forward, causing the seat 7 to move forward. At this time, the rigid elastic element 5 is compressed, so that the inner tube 1 and the outer tube 2 are tightened. It should be noted that when the movable head 11 moves backward, the movable head 11 moves away from the inner tube 1, so it will not interfere with the inner tube 1 and the rigid elastic element 5. When the movable head 11 moves forward, the movable head 11 pushes the inner tube 1. At this time, the traction rope 6 is in a slack state, so it will not interfere with the locking. Thus, the wrench 12 swings up and down to achieve the functions of unlocking and tightening by pulling the traction rope 6.

[0039] The transmission structure can also have two types of structures: The first type: such as Figure 7 , Figure 8 and Figure 9The transmission structure includes a wrench 12, a first connecting rod 13, a second connecting rod 14, and a third connecting rod 15. The wrench 12 is hinged to the first base 9, the first connecting rod 13 is also hinged to the first base 9, the second connecting rod 14 is hinged between the first connecting rod 13 and the wrench 12, one end of the third connecting rod 15 is integrated and hinged with the first connecting rod 13 and the second connecting rod 14, and the other end of the third connecting rod 15 is hinged to a movable head 11. The movable head 11 is slidably connected to the first base 9, that is, the four connecting rods form a linkage mechanism. The wrench 12 acts as a trigger mechanism to drive the linkage mechanism to form a linkage, thereby driving the movable head 11 to slide back and forth along the first base 9. Since the linkage mechanism is a conventional technology, it will not be described in detail here.

[0040] The second type: such as Figure 10 , Figure 11 As shown, the transmission structure includes a wrench 12, a fourth link 16, a fifth link 17, and a sixth link 18. One end of the fourth link 16 is hinged to the first base 9, and the other end of the fourth link 16 is fixedly connected to the wrench 12. One end of the fifth link 17 is hinged to the wrench 12, and the other end of the fifth link 17 is hinged to the sixth link 18. One end of the sixth link 18 is hinged to the fifth link 17, and the other end is hinged to the movable head 11. The second type is also a linkage mechanism formed by four links, which is also a conventional technology and will not be described in detail here.

[0041] The working principle of this embodiment is as follows: In the initial state, the elastic body 31 of the elastic locking part 3 abuts against the inner wall of the outer tube 2, so that static friction is formed between the elastic body 31 and the inner wall of the outer tube 2. At this time, the inner tube 1 and the outer tube 2 are in a locked state. However, the locked state is not completely locked, but the inner tube 1 and the outer tube 2 can still move slightly. This allows the inner tube 1 and the outer tube 2 to be connected and installed before locking. At this time, the wrench 12 is in the middle position. Then, the wrench 12 is first moved upward, and the movable head 11 pulls the traction rope 6. The traction rope 6 pulls the elastic locking part 3 to deform. After the elastic locking part 3 is deformed, it separates from the inner wall of the outer tube 2. In this way, the inner tube 1 and the outer tube 2 are in an unlocked state. At this time, the relative length between the inner tube 1 and the outer tube 2 can be adjusted. After the length is adjusted, the wrench 12 is moved downward to the middle position. At this time, the movable head 11 moves towards the inner tube 1, and the traction rope 6 is in a slack state. In this way, the traction rope 6 is no longer... Pull the elastic locking part 3 again, so that the elastic locking part 3 is in a static friction state with the inner wall of the outer tube 2. At this time, the inner tube 1 and the outer tube 2 are locked again. Then, the inner tube 1 and the outer tube 2 are placed between the two walls through the first base 9 and the second base 10. The wrench 12 is lowered to the lowest position. At this time, the movable head 11 moves towards the inner tube 1. The movable head 11 pushes the inner tube 1. The inner tube 1 compresses the rigid elastic element 5 through the seat 7. At this time, the traction rope 6 becomes loose and will not affect the elastic locking part 3. Since the inner tube 1 and the seat 7 squeeze the rigid elastic element 5, the rigid elastic element 5 is in a compressed state. The reaction force of the rigid elastic element 5 acts on the seat 7 and the inner tube 1, and the inner tube 1 and the outer tube 2 are in a locked state. Thus, the inner tube 1 and the outer tube 2 are in a tensile state, forming a pressure increase effect, so that the inner tube 1 and the outer tube 2 can be firmly supported between the two walls.

[0042] Therefore, it can be seen that the wrench 12 has three positions. When the wrench 12 is in the middle position, the movable head 11 neither pushes nor pulls the traction rope 6. When the wrench 12 is swung up, the movable head 11 pulls the traction rope 6, thereby deforming the elastic locking part 3, thus unlocking the inner tube 1 and the outer tube 2. When the wrench 12 is swung down to the middle position, the traction rope 6 continues to loosen, and then continues to swung down, the movable head 11 pushes the inner tube 1, causing the inner tube 1 to compress the rigid elastic element 5 through the seat body 7, thereby achieving tension.

[0043] It should be noted that during tensioning, the inner tube 1 moves toward the elastic locking part 3 under the push of the movable head 11, thereby compressing the rigid elastic element 5. The rigid elastic element 5 only needs to be compressed a little to achieve reaction tensioning. Therefore, the end of the inner tube 1 will not hit the elastic locking part 3, that is, the inner tube 1 and the elastic locking part 3 will not interfere with each other.

[0044] Example 2 The basic content is the same as in Embodiment 1, except that the elastic locking part 3 is included. In this embodiment, the elastic locking part 3 also includes a guide tube 33, which has an axial through hole 331. The guide tube 33 is axially connected to the end of the guide post 4, or the guide tube 33 is formed by extending from the end of the guide post 4. The base 311 of the elastic body 31 is connected between the guide tube 33 and the guide post 4 to form a fixation. One end of the traction rope 6 passes through the axial through hole 331 of the guide post 4 and the guide tube 33 to form several folded-back segments 61. That is, one end of the traction rope 6 is connected to the movable head 11, and the other end passes through the guide post 4 and the guide tube 33. After the guide tube 33, the rope 6 extends out from the top of the guide tube 33 and then folds back towards the elastic locking part 3 to form a fold-back segment 61. That is, the part of the traction rope 6 that extends beyond the top of the guide tube 33 serves as the fold-back segment 61. The fold-back segment 61 is connected to the elastic piece 312 of the elastic locking part 3. There are multiple fold-back segments 61, and the number of elastic pieces 312 corresponds one-to-one with the number of fold-back segments 61. In this way, each fold-back segment 61 can be connected to one elastic piece 312, so that when the traction rope 6 is pulled, all fold-back segments 61 can be pulled at the same time, that is, all elastic pieces 312 are pulled synchronously, causing the elastic pieces 312 to retract. It should be noted that in this embodiment, the pusher 32, guide post 4 and base 311 are fixed to each other. When tightening, the seat 7 compresses the rigid elastic member 5, and the end of the inner tube 1 moves toward the base 311. Therefore, there will be a certain gap between the base 311 and the end of the inner tube 1 as the stroke for the inner tube 1 to compress the rigid elastic member 5. Of course, when the end of the inner tube 1 compresses the rigid elastic member 5, it can reach the base 311 of the elastic locking part 3. Because the static friction between the elastic piece 312 and the inner wall of the outer tube 2 is greater than the elastic force of the rigid elastic member 5, the inner tube 1 will not cause the elastic piece 312 to retract when pushing the elastic locking part 3. Therefore, the tightening operation will not affect the locking state.

[0045] In this embodiment, the elastic sheet 312 has a hole so that the end of the folded-back segment 61 can be connected to the elastic sheet 312 by binding.

[0046] In this embodiment, one end of a traction rope 6 is forked to form multiple fold-back segments 61, or multiple traction ropes 6 can be twisted into one, with their ends separated to form fold-back segments 61.

[0047] Furthermore, the top end of the guide tube 33 can be formed into an arc surface to guide the extension and retraction of the fold-back segment 61 and avoid sharp edges cutting off the fold-back segment 61.

[0048] Example 3 The basic content is the same as in Embodiment 1, except that the elastic locking part 3 is different. In this embodiment, the elastic locking part 3 also includes a connector 34, a driving member 35, and an abutment 36. In this embodiment, the pushing member 32 is connected to or integrated with the guide post 4 at the end facing the outer tube 2. The abutment 36 is connected to or abuts at the end of the pushing member 32 facing the outer tube 2. The end of the abutment 36 facing the elastic locking part 3 abuts at or near the edge of the elastic piece 312. A through hole 361 is provided in the center of the abutment 36. The connector 34 is movably connected in the through hole 361. The connector 34 is similar to a bolt structure. One end of the connector 34 passes through the through hole 361 and connects to the base 311. The other end of the connector 34 is movably connected to a driving member 35. One end of the traction rope 6 passes through the guide post 4 and connects to the driving member 35. One end of the drive member 35 is connected to the traction rope 6, while the other side of the drive member 35, relative to the connection point of the traction rope 6, extends to abut against the abutment member 36. When the traction rope 6 pulls one side of the drive member 35, since the drive member 35 is movably connected to the connector 34, the drive member 35 can rotate or swing with the abutment member 36 as a lever point. Therefore, the other side of the drive member 35 will abut against the abutment member 36. As the traction rope 6 continues to pull, one side of the drive member 35 presses tightly against the abutment member 36 through the lever point, while the other side moves backward under the pull of the traction rope 6. The connector 34 moves backward under the drive member 35, thereby causing the connector 34 to pull the base 311 backward, thereby causing the elastic piece 312 to deform and retract, thereby unlocking the inner tube 1 and the outer tube 2. When the traction rope 6 no longer pulls the connector 34, the inner tube 1 and the outer tube 2 are locked due to the rebound force of the elastic locking part 3 itself. In this embodiment, during tensioning, the inner tube 1 moves toward the elastic locking part 3 under the push of the movable head 11, thereby compressing the rigid elastic element 5. The rigid elastic element 5 pushes the inner tube 1, which in turn pushes the seat 7. The seat 7 pushes the rigid elastic element 5. At this time, since the elastic force of the rigid elastic element 5 is less than the static friction force of the elastic locking part 3, the elastic locking part 3 will not be pushed and will close, so that tensioning and locking will not affect each other. This invention is not limited to the preferred embodiments described above. Anyone can derive other products in various forms under the guidance of this invention. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this invention.

Claims

1. A telescopic pole, characterized in that, The device includes an inner tube (1) and an outer tube (2) coaxially sleeved outside the inner tube (1). The inner tube (1) is provided with a locking mechanism at one end inside the outer tube (2). The locking mechanism includes an elastic locking part (3), a guide post (4), a rigid elastic element (5), a traction rope (6), and a seat (7). The seat (7) is fixedly connected to the inner wall of the inner tube (1). The seat (7) has a through hole (8) coaxial with the inner tube (1). The guide post (4) is sleeved in the through hole (8) and can move back and forth along the axial direction. The rigid elastic element (5) is sleeved on the guide post (4) and located between the end of the guide post (4) facing the outer tube (2) and the seat (7). The elastic locking part (3) is connected to the guide post (2). On the end of the column (4) facing the outer tube (2), the elastic locking part (3) forms static friction with the inner wall of the outer tube (2). One end of the traction rope (6) is connected to the guide column (4) or the elastic locking part (3). When the elastic locking part (3) is in the normal state, the elastic locking part (3) forms static friction with the inner wall of the outer tube (2), so that the inner tube (1) and the outer tube (2) are in a locked state. When the guide column (4) or the elastic locking part (3) is pulled by the traction rope (6), the elastic locking part (3) deforms and releases the static friction with the inner wall of the outer tube (2), so that the inner tube (1) and the outer tube (2) are in an unlocked state. At this time, the inner tube (1) and the outer tube (2) can slide relative to each other axially. The inner tube (1) and the outer tube (2) are respectively provided with a first base (9) and a second base (10) for abutting at opposite ends. A pressure boosting mechanism is provided between the first base (9) and the end of the inner tube (1). The pressure boosting mechanism includes a movable head (11) and a transmission structure. The movable head (11) and the transmission structure are connected. The movable head (11) is slidably connected in the first base (9). The transmission structure drives the movable head (11) to slide back and forth in the first base (9). One end of the movable head (11) abuts against the end of the inner tube (1). The other end of the traction rope (6) is connected to the movable head (11). When the movable head (11) slides in the direction of the inner tube (1) and pushes the inner tube (1), the inner tube (1) compresses the rigid elastic element (5) through the seat body (7). The reaction of the rigid elastic element (5) pushes the base (311) so that the inner tube (1) and the outer tube (2) form a tensioned state.

2. The telescopic pole according to claim 1, characterized in that, The elastic locking part (3) includes an elastic body (31), the elastic body (31) includes a base (311) and a plurality of elastic pieces (312) spaced around the base (311). The base (311) is connected to the end of the guide post (4). The traction rope (6) passes through the seat body (7) and the guide post (4) and then connects to the base (311). The elastic pieces (312) are arranged radially around the base (311).

3. The telescopic rod according to claim 2, characterized in that, The elastic sheet (312) is a metal sheet with elastic deformation capability.

4. The telescopic rod according to claim 3, characterized in that, The elastic locking part (3) also includes a guide tube (33), which has an axial through hole (331). The guide tube (33) is axially connected to the end of the guide post (4). The base (311) of the elastic body (31) is connected between the guide tube (33) and the guide post (4). One end of the traction rope (6) passes through the axial through hole (331) of the guide post (4) and the guide tube (33) to form several fold-back segments (61). The several fold-back segments (61) are connected one-to-one to each elastic piece (312) of the elastic body (31), so that when the traction rope (6) pulls the fold-back segments (61), the fold-back segments (61) pull the elastic pieces (312) so that all the elastic pieces (312) are synchronously retracted.

5. The telescopic rod according to claim 4, characterized in that, The elastic locking part (3) also includes a pusher (32), which is connected to or abuts against the end of the guide post (4) facing the outer tube (2). A through hole (361) is provided in the center of the pusher (32), and a connector (34) is movably connected in the through hole (361). One end of the connector (34) passes through the through hole (361) and is connected to the base (311). The other end of the connector (34) is movably connected to a drive member (35). One end of the traction rope (6) passes through the guide post (4) and is connected to the drive member (35). The drive member (35) abuts against the connector (34) on the other side of the connection point of the traction rope (6).

6. The telescopic rod according to claim 1, characterized in that, The transmission structure includes a wrench (12), a first connecting rod (13), a second connecting rod (14), and a third connecting rod (15). The wrench (12) is hinged to the first base (9), the first connecting rod (13) is also hinged to the first base (9), the second connecting rod (14) is hinged between the first connecting rod (13) and the wrench (12), one end of the third connecting rod (15) is integrated and hinged with the first connecting rod (13) and the second connecting rod (14), and the other end of the third connecting rod (15) is hinged to a movable head (11).

7. The telescopic rod according to claim 1, characterized in that, The transmission structure includes a wrench (12), a fourth link (16), a fifth link (17), and a sixth link (18). One end of the fourth link (16) is hinged to the first base (9), and the other end of the fourth link (16) is fixedly connected to the wrench (12). One end of the fifth link (17) is hinged to the wrench (12), and the other end of the fifth link (17) is hinged to the sixth link (18). One end of the sixth link (18) is hinged to the fifth link (17), and the other end is hinged to the movable head (11).

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