Telescopic rod

Abstract

The telescopic rod comprises an inner rod and an outer rod, a locking seat is arranged between the inner rod and the outer rod, the locking seat is fixedly connected to the end, located in the outer pipe, of the inner rod, a sliding groove is formed in the outer wall of the locking seat, a positioning pin is arranged in the sliding groove in a sliding mode, an elastic piece is arranged between the bottom of the positioning pin and the sliding groove, and the inner rod and the locking seat are sleeved with the outer rod. A plurality of positioning holes are formed in the outer rod in the axial direction, and the positioning holes are matched with the positioning pins. Unlocking is achieved by rotating the outer rod in a relatively small range, the relative position between the outer rod and the inner rod can be adjusted, finally locking can be achieved through the positioning pin, the overall structure is simple, and operation is convenient.

Description

Technical Field

[0001] This utility model 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 and door curtain rods. Two rod-shaped parts are interlocked and slide relative to each other. A locking mechanism is provided between the two rod-shaped parts. When the two rod-shaped parts extend or retract relative to each other, they are locked by the locking mechanism, thereby realizing the telescopic function of the rod. Currently, the locking structure of telescopic rods on the market is usually quite complex, which not only increases the manufacturing cost, but also makes them heavy and not portable enough. Utility Model Content

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

[0004] This utility model designs a telescopic rod, including an inner rod and an outer rod, with a locking seat between the inner rod and the outer rod. The locking seat is fixedly connected to one end of the inner tube located inside the outer tube. A sliding groove is opened on the outer wall of the locking seat, and a positioning pin is slidably arranged in the sliding groove. An elastic element is provided between the bottom of the positioning pin and the sliding groove. The outer rod is sleeved on the inner rod and the locking seat.

[0005] The outer rod has multiple positioning holes along its axial direction, and these positioning holes cooperate with positioning pins.

[0006] One of the two outward-facing surfaces of the positioning pin is an inclined slope, and the other opposite surface is a vertical surface. This allows the positioning pin to be inserted into the positioning hole along the slope when the outer rod and the locking seat rotate relative to each other, forming a fit. At this time, the vertical surface can prevent the outer rod and the locking seat from rotating relative to each other in opposite directions, thus locking the inner rod and the outer rod. When the outer rod and the locking seat rotate relative to each other again in the same direction, the positioning pin disengages from the positioning hole along the other slope, thus unlocking the outer rod and the locking seat.

[0007] Preferably, the positioning pin includes a base and a pin body, the base and the pin body are designed as an integral unit, the base is slidably connected in a groove, the elastic element is located between the bottom surface of the base and the groove, the pin body includes an inclined slope surface on one side and a vertical surface on the opposite side, the top surface is between the vertical surface and the slope surface, and the top surface is inclined toward the vertical surface.

[0008] Further optimization involves providing a guide arc surface on the landslide surface, with both sides of the guide arc surface smoothly transitioning to the landslide surface.

[0009] Further optimization involves providing guide grooves on the left and right sides of the base, and providing guide rails that cooperate with the guide grooves on the inner wall of the slide groove.

[0010] Preferably, the locking seat includes a first end and a second end, the outer diameter of the first end is smaller than the outer diameter of the second end, the inner rod is sleeved on the first end, and the outer rod is sleeved on the second end and the inner rod.

[0011] Further optimization involves providing symmetrically distributed grooves on the outer peripheral wall of the first end, with elastically deformable snap-fit ​​blocks extending from the inner wall of the grooves. The inner rod has a slot on its peripheral wall. After the inner rod is sleeved with the first end, the snap-fit ​​blocks snap into the slots to form a limiting position, thereby fixing the first end and the inner rod together.

[0012] Further optimization is achieved by making the pin body square when viewed from above, and the positioning hole also being square.

[0013] Preferably, the inner rod is a cylindrical structure, the first and second ends of the locking seat are cylindrical structures, the inner rod has an axially extending limiting protrusion on the inner wall on the side where the positioning pin is located, and the outer wall of the first end of the locking seat forms a limiting recess that forms a convex-concave fit with the limiting protrusion.

[0014] The technical advantages of this invention are as follows: the inner rod and the outer rod are interlocked. A locking seat is provided at the end of the inner rod inserted into the outer tube. The locking seat has two parallel, elastically retractable positioning pins, namely the first positioning pin and the second positioning pin. The outer rod has two rows of positioning holes along its axial direction, one row being the first positioning hole and the other row being the second positioning hole. By rotating the outer rod, the first and second positioning holes can be rotated to engage with the first and second positioning pins respectively. Specifically, when the first positioning hole rotates to engage with the first positioning pin to form a lock, the second positioning pin is compressed by the inner wall of the outer rod and retracts into a groove. Because the two opposing surfaces of the first and second positioning pins are inclined slopes, and the two oppositely facing surfaces are vertical, the slopes guide the rotation of the positioning holes, while the vertical surfaces limit the positioning holes.

[0015] Therefore, when adjusting the relative length of the outer and inner rods, simply rotate the outer rod slightly to allow the first positioning hole to contract along the slope surface due to pressure from the inner wall of the outer rod. During the rotation, the first and second positioning pins are simultaneously compressed, unlocking the inner and outer rods. This allows for relative axial movement between the inner and outer rods, thus adjusting the length of the telescopic rod. After the axial movement is complete, continue rotating the outer rod until the second positioning hole engages with the second positioning pin, locking the telescopic rod after adjustment. The two rows of positioning holes and two positioning pins allow the outer rod to rotate within a relatively small range during rotation, eliminating the need for reverse rotation of the remaining range. Unlocking is achieved simply by rotating either the outer or inner rod, resulting in better feel and stability. This invention is not only simple and easy to operate but also highly stable. Attached Figure Description

[0016] Figure 1 This is an exploded view of the overall structure of this utility model;

[0017] Figure 2 This is an overall structural diagram of the locking seat in this utility model;

[0018] Figure 3 This is an exploded view of the positioning pin, elastic element, and locking seat in this utility model.

[0019] In the diagram: 1. Inner rod; 11. Slot; 12. Limiting protrusion; 2. Outer rod; 21. Positioning hole; 3. Locking seat; 31. Slide groove; 33. Positioning pin; 331. Base; 332. Pin body; 333. Sloping surface; 334. Vertical surface; 335. Top surface; 336. Guide groove; 337. Guide rail; 338. Guide arc surface; 34. Elastic element; 35. First end; 351. Groove; 352. Buckle block; 353. Limiting recess; 36. Second end; Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0021] This utility model includes an inner rod 1 and an outer rod 2, which are sleeved together. Both the inner rod 1 and the outer rod 2 are circular tube structures. A locking seat 3 is provided between the inner rod 1 and the outer rod 2. The locking seat 3 is fixedly connected to one end of the inner tube located inside the outer tube, that is, the locking seat 3 is fixed to the end of the inner rod 1. The outer rod 2 is sleeved on the outside of the inner rod 1 and the locking seat 3, so that the outer rod 2 can rotate relative to the locking seat 3 and move axially along the inner rod 1.

[0022] The locking seat 3 has a radially formed groove 31. The top opening of the groove 31 is located on the outer wall of the locking seat 3. A positioning pin 33 is slidably disposed in the groove 31. An elastic element 34 is provided between the bottom of the positioning pin 33 and the corresponding groove 31, so that the positioning pin 33 can float radially back and forth along the groove 31. The positioning pin 33 is in a normally extended state under the action of the elastic element 34. In this embodiment, the elastic element 34 is a spring.

[0023] Multiple positioning holes 21 are provided on the outer rod 2 along the axial direction. In this embodiment, the multiple positioning holes 21 can be distributed in a straight line or in a wavy line along the outer rod 2. The multiple positioning holes 21 are arranged along the axial direction to form a group of positioning holes 21. In this embodiment, the positioning pin 33 is inserted into the positioning hole 21 to form a fit.

[0024] There is a certain distance between two adjacent positioning holes 21. When the positioning pin 33 is inserted into the positioning hole 21, the positioning pin 33 will not be inserted into the corresponding second positioning hole 22, but will be located between the first positioning hole 21 and the second positioning hole 22. That is, the second positioning pin 33 is pressed down to the retracted state by the inner wall of the outer rod 2. At this time, the first positioning hole 21 and the first positioning pin 32 cooperate, and the outer rod 2 and the inner rod 1 are locked together.

[0025] Of the two opposing surfaces of the two positioning pins 33, one is an inclined slope surface 333, and the other is a vertical surface 334. When the outer rod 2 and the locking seat 3 rotate relative to each other, that is, when the outer rod 2 or the locking seat 3 rotates in one direction, the positioning pin 33 can be inserted into the positioning hole 21 along the slope surface 333 to form a fit. In other words, the slope surface 333 acts as an inclined surface and plays a guiding role, while the vertical surface 334 plays a blocking role in the opposite direction, preventing the positioning pin 33 from moving along the vertical surface 334, thereby locking the inner rod 1 and the outer rod 2.

[0026] The landslide surface 333 can be on either side, and the vertical surface 334 is set on the opposite side of the landslide surface 33. In this embodiment, the vertical surface 334 of the positioning pin 33 is located on the left and the landslide surface 333 is located on the right. Since the vertical surface 334 plays a limiting role, the outer rod 2 cannot continue to turn to the left. However, the right side is the landslide surface 333, so the outer rod 2 can rotate to the right along the landslide surface 333. That is, the outer rod 2 and the locking seat 3 rotate relative to each other in the same direction again. The positioning pin 33 disengages from the positioning hole 21. Before reaching the next positioning hole 21, the positioning pin 33 is in a compressed state. At this time, the outer rod 2 and the inner rod 1 are in an unlocked state. The outer rod 2 and the inner rod 1 can adjust the preset length to each other. As the outer rod 2 and the locking seat 3 continue to rotate relative to each other in the same direction, the positioning pin 33 moves and inserts into the next positioning hole 21 to form a fit. At this time, the outer rod 2 and the inner rod 1 are locked to each other. Thus, the telescopic rod completes the length adjustment.

[0027] It should be noted that a guide arc surface 338 is provided in the central section of the landslide surface 333. After the positioning pin 33 is inserted into the positioning hole 21, the guide arc surface 338 can play a certain positioning role for the landslide surface 33. At the same time, it plays a certain guiding role when rotating along the landslide surface 333 again, forming a certain damping feel and enhancing the feel and operability.

[0028] Furthermore, the positioning pin includes a base 331 and a pin body 332. The positioning pin is made entirely of metal. The base 331 and the pin body 332 are integrated. The base 331 is slidably connected to the slide groove 31. The elastic element 34 is located between the bottom surface of the base 331 and the slide groove 31. The pin body 332 includes an inclined slope surface 333 on one side and a vertical surface 334 opposite to it. The vertical surface 334 and the slope surface 333 are connected to a top surface 335. The top surface 335 is inclined toward the vertical surface 334. When the positioning pin 33 is compressed, its top surface 335 abuts against the inner wall of the outer rod 2. When the outer rod 2 is rotated, the positioning pin 33 moves from the compressed state into the corresponding positioning hole 21. During this process, the top surface 335 of the positioning pin 33 abuts against the inner wall of the inner rod 1 and moves along the inner wall of the inner rod 1. The top surface 335 is inclined so that the top surface 335 can adapt to the arc-shaped inner wall of the inner rod 1, which is beneficial to the rotation of the outer rod 2.

[0029] Furthermore, guide grooves 336 are provided on the left and right sides of the base 331, and guide rails 337 that cooperate with guide grooves 336 are provided on the inner wall of the slide groove 31, so that the positioning pin can float up and down stably.

[0030] Furthermore, the locking seat 3 includes a first end 35 and a second end 36. The outer diameter of the first end 35 is smaller than the outer diameter of the second end 36, that is, the first end 35 and the second end 36 form a stepped surface. The inner rod 1 is sleeved on the first end 35, and the outer tube is sleeved on the second end 36 and the inner tube.

[0031] Furthermore, the outer peripheral wall of the first end 35 is provided with symmetrically distributed grooves 351, and the inner wall of the grooves 351 extends out with elastically deformable latching blocks 352. In this embodiment, since the positioning seat is a plastic structure, the latching block 352 is also a plastic structure. One end of it is integrally connected to the inner wall of the groove 351, and the other end is suspended, thus forming a latching block 352 with elastic deformation. The peripheral wall of the inner rod 1 is provided with a slot 11. After the inner rod 1 is sleeved with the first end 35, the latching block 352 is latched in the slot 11 to form a limit, so that the first end 35 and the inner rod 1 form a detachable fixed connection with each other. This not only has a simple structure, but also facilitates loading and unloading.

[0032] Furthermore, the pin 332 is square when viewed from above, and the positioning hole 21 is square, so that when the positioning pin 33 and the positioning hole 21 are engaged, they can form a limit to prevent relative displacement between the positioning pin and the positioning hole 21.

[0033] Furthermore, the inner rod 1 is a cylindrical structure, and the first end 35 and the second end 36 of the locking seat 3 are cylindrical structures. The inner rod 1 has an axially extending limiting protrusion 12 on the inner wall on the side where the positioning pin is located. The outer wall of the first end 35 of the locking seat 3 forms a limiting recess 353 that is in concave-convex fit with the limiting protrusion 12. The limiting protrusion 12 and the limiting recess 353 interlock, so that the inner rod 1 and the first end 35 of the locking seat 3 form a radial limit, preventing relative rotation between the inner rod 1 and the locking seat 3.

[0034] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A telescopic pole, characterized in that, The utility model provides a locking device of telescopic rod, including inner rod (1) and outer rod (2), be equipped with locking seat (3) between inner rod (1) and outer rod (2), locking seat (3) is fixedly connected to the one end of inner tube inside outer tube, locking seat (3) outer wall is equipped with sliding slot (31), sliding slot (31) is equipped with locating pin (33) inside sliding, and the bottom of locating pin (33) is equipped with elastic element (34) between sliding slot (31), and outer rod (2) is set in inner rod (1) and locking seat (3) outside, The outer rod (2) is provided with a plurality of positioning holes (21) along the axial direction, and the positioning holes (21) are matched with the locating pin (33), One of the two outwardly facing surfaces of the locating pin is an inclined sliding surface (333), and the other opposite surface is a vertical surface (334). When the outer rod (2) and the locking seat (3) rotate relative to each other, the locating pin (33) is inserted into the positioning hole (21) along the sliding surface (333) to form a cooperation, at this time, the vertical surface (334) can block the relative rotation of the outer rod (2) and the locking seat (3) in the opposite direction, so that the inner rod (1) and the outer rod (2) are locked. When the outer rod (2) and the locking seat (3) rotate relative to each other in the same direction again, the locating pin (33) is separated from the positioning hole (21) along the sliding surface (333), at this time, the outer rod (2) and the locking seat (3) are unlocked.

2. A telescopic pole according to claim 1, characterised in that The locating pin (33) includes a base (331) and a pin body (332), the base (331) and the pin body (332) are designed in one piece, the base (331) is slidingly connected in the sliding slot (31), and the elastic element (34) is located between the bottom surface of the base (331) and the sliding slot (31). The pin body (332) includes an inclined sliding surface (333) on one side and a vertical surface (334) on the other side. The vertical surface (334) and the sliding surface (333) form a top surface (335) therebetween, and the top surface (335) is inclined towards the sliding surface (333).

3. A telescopic pole according to claim 2, wherein, The sliding surface (333) is provided with a guide arc surface (338), and the two sides of the guide arc surface (338) are smoothly connected with the sliding surface (333).

4. A telescopic pole according to claim 2, wherein, The left and right sides of the base (331) are provided with guide grooves (336), and the inner wall of the sliding slot (31) is provided with guide rails (337) matched with the guide grooves (336).

5. A telescopic pole according to claim 1, wherein The locking seat (3) includes a first end (35) and a second end (36), the outer diameter of the first end (35) is smaller than the outer diameter of the second end (36), the inner rod (1) is sleeved on the first end (35), and the outer rod (2) is sleeved on the second end (36) and the outer rod (1).

6. A telescopic pole according to claim 5, wherein, The outer peripheral wall of the first end (35) is provided with symmetrically distributed grooves (351), the inner wall of the groove (351) extends out a clamping block (352) with elastic deformation, the peripheral wall of the inner rod (1) is provided with a clamping groove (11), and after the inner rod (1) is sleeved with the first end (35), the clamping block (352) is clamped in the clamping groove (11) to limit the position, so that the first end (35) and the inner rod (1) are fixed with each other.

7. A telescopic pole according to claim 2, wherein The pin body (332) is square in plan view, and the positioning hole (21) is also a square hole.

8. A telescopic pole according to claim 1, characterised in that The inner rod (1) is a circular tube structure, the first end (35) and the second end (36) of the locking seat (3) are cylindrical structures, the inner wall of the inner rod (1) on the side of the positioning pin is provided with an axially extending limiting protrusion (12), and the outer wall of the first end (35) of the locking seat (3) forms a limiting recess (353) matched with the limiting protrusion (12).

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