telescopic pole
The telescopic rod design addresses the complexity and weight issues of existing rods by using a sliding block and elastic element to control the positioning pin, offering a lightweight, cost-effective, and efficient telescopic solution.
Patent Information
- Application Number
- DE202025101604
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2025-01-24
- Filing Date
- 2025-03-25
- Publication Date
- 2025-05-15
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Existing telescopic rods have a complicated locking structure that increases manufacturing costs and weight, making them inefficient and cumbersome.
A telescopic rod design featuring an inner and outer tube with a locking seat, a sliding block, a positioning pin, and an elastic element, where a pulling cable operates the sliding block to contract or expand the positioning pin, allowing for telescopic movement and locking through radial through-holes in the tubes.
The design provides a simple, stable, and efficient telescopic mechanism with reduced weight and cost, enabling easy length adjustment and secure locking.
Smart Images
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Abstract
Description
Technical field
[0001] The present utility model relates to the technical field of telescopic poles, in particular a telescopic pole. State of the art
[0002] Manual telescopic rods have a wide range of applications, such as curtain rods and door curtain rods. Two rod-shaped elements are inserted into each other to form a relative sliding movement, and a locking mechanism is provided between the two rod-shaped elements. When the two rod-shaped elements are retracted or extended, they are locked by the locking mechanism, thereby realizing the telescopic function of the telescopic rod. The locking structure of the telescopic rods currently on the market generally has a complicated structure, which not only increases the manufacturing cost but is also heavy and not light enough. Contents of this utility model
[0003] The purpose of the present utility model is to develop a telescopic rod to solve the above technical deficiencies in the prior art.
[0004] The present utility model develops a telescopic rod comprising an inner tube and an outer tube coaxially fitted outside the inner tube, wherein the locking seat is provided between the inner tube and the outer tube, wherein the locking seat is fixedly connected to one end of the inner tube provided inside the outer tube, wherein a cavity is provided inside the locking seat, wherein the cavity is provided with a sliding groove along a radial direction of the inner tube, wherein a sliding block is slidably connected to the sliding groove, wherein the sliding block is provided with a positioning pin at one end facing the radial direction, wherein the positioning pin moves with the sliding block, and wherein an elastic element is provided between another end of the sliding block facing the radial direction and the cavity, wherein a roller is rotatably provided inside the cavity,and wherein the pulley and the positioning pin are respectively located at the two end positions of the elastic element, wherein the sliding block is fastened with a pulling cable, wherein one end of the pulling cable is connected to the end of the sliding block abutting against the elastic element, and wherein the other end extends axially along the axial direction of the inner tube as the force application end after being wound around the pulley, wherein when a driving force is applied to the force application end of the pulling cable and the pulling cable is pulled, the pulling cable pulls the sliding block along the pulley, so that the sliding block compresses and slides the elastic element, resulting in the contraction of the positioning pin, wherein when the driving force at the force application end is released, the sliding block slides in the opposite direction under the restoring force of the elastic element, causing the positioning pin to expand,wherein the locking seat is provided with a first radial through-hole on a peripheral wall, which serves for the telescopic movement of the positioning pin, and wherein the inner tube is provided with a second radial through-hole at a corresponding location, so that the positioning pin can perform a telescopic movement along the first radial through-hole and the second radial through-hole, wherein the outer tube is provided with a plurality of positioning holes distributed in a straight line along the axial direction, wherein, when the positioning pin is in a contracted state, the outer tube and the inner tube can slide relative to each other in the axial direction, and wherein, when the positioning pin is in the extended state, the positioning pin extends through the second radial through-hole into the positioning hole,to form a positioning, wherein the outer tube and the inner tube form a lock.,
[0005] The locking seat includes a first end and a second end, wherein an outer diameter dimension of the first end is smaller than an outer diameter dimension of the second end, wherein the inner tube is seated at the first end and wherein the outer tube is seated at the second end and outside the inner tube.
[0006] Preferably, the first end is provided with symmetrically distributed recesses in an outer peripheral wall, wherein a snap block with an elastic deformation extends from the inner wall of the recesses, and wherein the inner tube is provided with a clamping slot in the peripheral wall, wherein, after the inner tube is placed with the first end, the snap block snaps into the clamping slot to form a boundary, so that the first end and the inner tube are fastened to each other.
[0007] Preferably, two seat bodies are connected to each other in radial halves by snap-fitting to form the locking seat, wherein both seat bodies are provided with chambers inside, and wherein the chambers of the two seat bodies are connected to each other to form the entire cavity, wherein edges of the two seat bodies are provided with halved opening structures, and wherein the two seat bodies are connected to each other to form an entire first radial through-hole.
[0008] Preferably, the sliding block is provided with a first guide groove on a side surface, wherein a first guide rail, which slidably cooperates with the first guide groove, is provided on the inner wall of the cavity of the locking seat.
[0009] Preferably, a second guide rail is provided on the other opposite side surface of the slide block, wherein a second guide groove slidably cooperating with the second guide rail is provided on the inner wall of the cavity of the locking seat.
[0010] Preferably, one end of the sliding block is provided with a mounting hole, the mounting hole being provided with a positioning post in the center, the elastic member being a spring, one end of the spring being located in the mounting hole and being fitted onto the positioning post.
[0011] Preferably, the inner tube and the outer tube have a circular tube structure, wherein limiting recesses extending in the axial direction are provided on a side of the inner tube and the outer tube on which the positioning pin is located, and wherein the second radial through hole and the positioning hole are located in the corresponding limiting recesses.
[0012] The present utility model has the following technical effects: The inner tube and the outer tube are fitted together, a locking seat is provided at the end of the inner tube inserted into the outer tube, a sliding block and a roller are provided inside the locking seat, the sliding block is slidably connected to the locking seat, the roller is rotatably connected to the locking seat, and a positioning pin is provided on the sliding block. An elastic member is provided between the sliding block and the inside of the locking seat, so that the positioning pin is in a state of constant expansion under the elasticity of the elastic member. The positioning pin extends into a positioning hole of the outer tube to form a lock between the inner tube and the outer tube.A traction rope is connected to the sliding block, and the sliding block is pulled by pulling the traction rope along the pulley, which causes the sliding block to compress the elastic member, thereby contracting the positioning pin, and then allows the inner tube and the outer tube to slide relative to each other, that is, realizes the adjustment of the length of the telescopic rod. Therefore, the present utility model not only has a simple and easy-to-implement structure, but also has good stability. Short description of the drawings Fig. 1 shows an exploded view of the overall structure of the present utility model; Fig. 2 shows a structural diagram of the locking seat of the present utility model; Fig. 3 shows a structural sectional view of the locking seat of the present utility model; Fig.4 shows an exploded view of the structure of the sliding block and the elastic member of the present utility model.
[0013] Reference list: 1. inner tube; 11. snap slot; 12. second radial through hole; 2. outer tube; 21. positioning hole; 3. locking seat; 31. cavity; 32. sliding groove; 33. sliding block; 34. positioning pin; 35. elastic element; 36. pulley; 37. pull rope; 39. first radial through hole; 310. first end; 311. second end; 312. recess; 313. snap block; 314. seat body; 315, first guide groove; 316. first guide rail; 317. second guide groove; 318. mounting hole; 319. positioning post; 320. second guide rail; 4. limit recess. Detailed embodiment
[0014] The technical solutions in the embodiments of the present utility model are described clearly and completely below in conjunction with the attached drawings in the embodiments of the present utility model. Of course, the described embodiments represent only a portion of the embodiments of the present utility model, not all of them. Starting from the embodiments of the present utility model, all other embodiments that a person skilled in the art can produce without creative effort fall within the scope of the present utility model.
[0015] The present utility model includes an inner pipe 1 and an outer pipe 2 which is coaxially disposed on the outside of the inner pipe 1. The inner pipe 1 and the outer pipe 2 have a circular pipe structure. A locking seat 3 is provided between the inner pipe 1 and the outer pipe 2. The locking seat 3 is fixedly connected to one end of the inner pipe 1 that is located inside the outer pipe 2, and the locking seat 3 has a cylindrical structure. The locking seat 3 is provided with a cavity 31 inside. The cavity 31 is provided with a sliding groove 32 along the radial direction of the inner pipe 1, and a sliding block 33 is slidably connected inside the sliding groove 32.That is, the sliding block 33 slides back and forth along the radial direction of the locking seat 3, a positioning pin 34 is fixed to one end of the sliding block 33 facing the radial direction, and the positioning pin 34 moves with the sliding block 33, an elastic member 35 is provided between another end of the sliding block 33 facing the radial direction and the cavity 31, and a roller 36 is rotatably provided in the cavity 31, and the roller 36 and the positioning pin 34 are each located in the end position of the elastic member 35.
[0016] The sliding block 33 is fixed with a pulling rope 37, in this embodiment, the pulling rope 37 is a steel wire, one end of the pulling rope 37 is connected to the central position of the end of the sliding block 33 with the elastic member 35, and the other end of the pulling rope 37 extends axially along the inside of the inner tube 1 as the force application end after being wound around the pulley 36.
[0017] The traction cable 37 is pulled by pulling the power application end. Since the traction cable 37 is in a tense state, it is only necessary to pull the traction cable 37 slightly, thereby pulling the sliding block 33 along the pulley, and the sliding block 33 overcomes the elastic member 35 and slides. In this embodiment, the elastic member 35 is a spring. The sliding block 33 compresses the spring under the tension of the traction cable 37, and the sliding block 33 moves and drives the positioning pin 34 to contract.
[0018] It should be noted that the force application end of the pull cable 37 may extend axially to the other end of the inner tube 1, or it may extend to one side of the inner tube 1, wherein the inner tube 1 is provided with a manually triggered switch, and the pull cable 37 is connected to the manually triggered switch. The pull cable 37 is brought and pulled by manually pressing the manually triggered switch, and the manually triggered switch is a relatively common transmission structure, which will not be discussed here.
[0019] When the driving force is applied to the power application end of the pulling cable 37, the pulling cable 33 pulls the sliding block 33 along the pulley 36, and the purpose of the pulley 36 is to change the direction of the pulling cable 37 and make the pulling more energy-saving, and the sliding block 33 compresses the elastic member 35 and slides, which in turn drives the positioning pin 34 to contract, when the driving force of the power application end is withdrawn, the sliding block 33 slides in the opposite direction under the restoring force of the elastic member 35, which makes the positioning pin 34 expand, and the locking seat 3 is provided with a peripheral wall of the locking seat.
[0020] The peripheral wall of the locking seat 3 is provided with a first radial through-hole 39 for the expansion and contraction of the positioning pin 34. The inner tube 1 is provided with a second radial through-hole 12 at a corresponding location for the positioning pin 34 to perform an expansion and contraction action along the first radial through-hole 39 and the second radial through-hole 12. The outer tube 2 is provided with a number of positioning holes 21 distributed in a straight line along the axial direction. When the positioning pin 34 is in a contracted state, the outer tube 2 and the inner tube 1 can slide relative to each other in the axial direction, i.e.the telescopic tube can be adjusted in length, when the positioning pin 34 is in an extended state, the positioning pin 34 extends through the second radial through hole 12 into the positioning holes 21 to form a positioning with the positioning holes 21, wherein the outer tube 2 and the inner tube 1 form a lock due to the plurality of positioning holes 21 forming different gear stages, that is, the telescopic tube is locked after the length adjustment.
[0021] It should be noted that in the conventional state, the sliding block 33 is unilaterally under the elastic force of the spring, that is, the positioning pin 34 is in a state of constant extension, that is, the inner tube 1 and the outer tube 2 are in a constant locking state, and it is necessary to adjust the length only by pulling the pulling rope 37.
[0022] Furthermore, the locking seat 3 comprises a first end 310 and a second end 311, wherein the outer diameter of the first end 310 is smaller than the outer diameter of the second end 311, ie the first end 310 and the second end 311 form a step surface, the inner tube 1 is connected to the first end 310, and the outer tube 2 is connected to the second end 311 and outside the inner tube 1.
[0023] Further, the peripheral wall of the first end 310 is provided with symmetrically distributed recesses 312, and a snap block 313 with elastic deformation extends from the inner wall of the recesses 312. In this embodiment, since the positioning seat is a plastic structure, the snap block 313 is also a plastic structure, and one end of the snap block 313 is integrally connected to the inner wall of the recess 312, and the other end of the snap block 313 is in an overhanging state, so that the snap block 313 with elastic deformation is formed.The inner tube 1 is provided with a snap-in slot 11 on the peripheral wall, and after the inner tube 1 is connected to the first end 310, the snap-in block 313 is snapped into the snap-in slot 11 to form a boundary, so that the first end 310 and the inner tube 1 form a detachable fixed connection with each other, which is not only structurally simple but also convenient for loading and unloading.
[0024] Furthermore, the locking seat 3 consists of two radially halved seat bodies 314 connected to each other, that is, the cylindrical locking seat 3 is opened in half along the axial cross section, the two seat bodies 314 are opened with cavities inside, and the two seat bodies 314 are connected to each other to form an entire cavity 31. Note that the cavity 31 is divided into individual cavities 31 by guide ribs, and each of the cavities 31 is used for mounting the roller 36 and the slide block 33, so that there is no movement interference and the stability of the respective movements of the roller 36 and the slide block 33 is ensured; edges of the two seat bodies 314 are both opened with a halved opening structure, and the two seat bodies 314 are connected to each other to form an entire first radial through hole 39.
[0025] Furthermore, one side surface of the slide block 33 is provided with a first guide groove 315, and the inner wall of the cavity 31 of the locking seat 3 is provided with a first guide rail 316 slidably connected to the first guide groove 315. The other opposite side surface of the slide block 33 is provided with a second guide rail 320, and the inner wall of the cavity 31 of the locking seat 3 is provided with a second guide groove 317 slidably connected to the second guide rail 320, so that both opposite sides of the slide block 33 form a sliding connection with the interior of the cavity 31 to make the sliding of the slide block 33 more stable.
[0026] Further, one end of the sliding block 33 is provided with a mounting hole 318, a positioning post 319 is provided in the center of the mounting hole 318, the elastic member 35 is a spring, and one end of the spring is located in the mounting hole 318 and is set on the positioning post 319, so that the spring can be stably mounted in the mounting hole 318, which improves the stability of spring extension and contraction.
[0027] Furthermore, the inner tube 1 and the outer tube 2 are both circular tube structures, and the inner tube 1 and the outer tube 2 are provided with axially extending limiting recesses 4 on the side where the positioning pin 34 is located. The second radial through-hole 12 and the positioning hole 21 are located in the corresponding limiting recesses 4, so that the positioning pin 34 is hidden in the limiting recesses 4 and does not interfere with the seating connection between the inner tube 1 and the outer tube 2. At the same time, a radial limit is formed between the inner tube 1 and the outer tube 2, which prevents the inner tube 1 and the outer tube 2 from rotating relative to each other.
Claims
[1] Telescopic rod, characterized bythat it comprises an inner tube (1) and an outer tube (2) which is coaxially mounted outside the inner tube (1), wherein the locking seat (3) is provided between the inner tube (1) and the outer tube (2), wherein the locking seat (3) is fixedly connected to one end of the inner tube (1) which is provided inside the outer tube (2), wherein a cavity (31) is provided inside the locking seat (3), wherein the cavity (31) is provided with a sliding groove (32) along a radial direction of the inner tube (1), wherein a sliding block (33) is slidably connected to the sliding groove (32), wherein the sliding block (33) is provided with a positioning pin (34) at one end facing the radial direction, wherein the positioning pin (34) moves with the sliding block (33), and wherein between another end of the sliding block (33) facing the radial direction and an elastic element (35) is provided in the cavity (31),wherein a roller (36) is rotatably provided inside the cavity (31), and wherein the roller (36) and the positioning pin (34) are respectively located at the two end positions of the elastic element (35), wherein the sliding block (33) is fastened with a pulling cable (37), wherein one end of the pulling cable (37) is connected to the end of the sliding block (33) abutting against the elastic element (35), and wherein the other end extends axially along the axial direction of the inner tube (1) as the force application end after being wound around the roller (36), wherein, when a driving force is applied to the force application end of the pulling cable (37) and the pulling cable (37) is pulled, the pulling cable (37) pulls the sliding block (33) along the roller (36), so that the sliding block (33) compresses and slides the elastic element (35), resulting in the contraction of the positioning pin (34) where, when the driving force is withdrawn at the force application end,the sliding block (33) slides in the opposite direction under the restoring force of the elastic element (35), which causes an extension of the positioning pin (34), wherein the locking seat (3) is provided with a first radial through-hole (39) on a peripheral wall, which serves for the telescopic movement of the positioning pin (34), and wherein the inner tube (1) is provided at a corresponding location with a second radial through-hole (12) so that the positioning pin (34) can perform a telescopic movement along the first radial through-hole (39) and the second radial through-hole (12), wherein the outer tube (2) is provided with a plurality of positioning holes (21) along the axial direction, which are distributed in a straight line, wherein, when the positioning pin (34) is in a contracted state,the outer tube (2) and the inner tube (1) can slide relative to each other in the axial direction, and wherein, when the positioning pin (34) is in the extended state, the positioning pin (34) extends through the second radial through-hole (12) into the positioning hole (21) to form a positioning, wherein the outer tube (2) and the inner tube (1) form a lock., [2] Telescopic rod according to claim 1, characterized by in that the locking seat (3) comprises a first end (310) and a second end (311), wherein an outer diameter dimension of the first end (310) is smaller than an outer diameter dimension of the second end (311), wherein the inner tube (1) is placed on the first end (310) and wherein the outer tube (2) is placed on the second end (311) and outside the inner tube (1). [3] Telescopic rod according to claim 2, characterized byin that the first end (310) is provided with symmetrically distributed recesses (312) in an outer peripheral wall, wherein a snap block (313) extends with an elastic deformation from the inner wall of the recesses (312), and wherein the inner tube (1) is provided with a clamping slot (11) in the peripheral wall, wherein, after the inner tube (1) has been placed with the first end (310), the snap block (313) snaps into the clamping slot (11) to form a boundary, so that the first end (310) and the inner tube (1) are fastened to one another. [4] Telescopic rod according to claim 3, characterized byin that two seat bodies (314) are connected to one another in radial halves by snapping into place to form the locking seat (3), wherein both seat bodies (314) are provided with chambers inside, and wherein the chambers of the two seat bodies (314) are connected to one another to form the entire cavity (31), wherein edges of the two seat bodies (314) are provided with halved opening structures, and wherein the two seat bodies (314) are connected to one another to form an entire first radial through-hole (39). [5] Telescopic rod according to claim 1, characterized by in that the sliding block (33) is provided with a first guide groove (315) on a side surface, and wherein a first guide rail (316) which slidably cooperates with the first guide groove (315) is provided on the inner wall of the cavity (31) of the locking seat (3). [6] Telescopic rod according to claim 5, characterized bythat a second guide rail (320) is provided on the other opposite side surface of the sliding block (33), and wherein a second guide groove (317) which slidably cooperates with the second guide rail (320) is provided on the inner wall of the cavity (31) of the locking seat (3). [7] Telescopic rod according to claim 1, characterized by that one end of the sliding block (33) is provided with a mounting hole (318), wherein the mounting hole (318) is provided with a positioning post (319) in the middle, wherein the elastic element (35) is a spring, wherein one end of the spring is located in the mounting hole (318) and is placed on the positioning post (319). [8] Telescopic rod according to claim 1, characterized byin that the inner tube (1) and the outer tube (2) have a circular tube structure, wherein limiting recesses (4) extending in the axial direction are provided on a side of the inner tube (1) and the outer tube (2) on which the positioning pin (34) is located, and wherein the second radial through-hole (12) and the positioning hole (21) are located in the corresponding limiting recess (4).
Citation Information
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