Telescopic rod with elastic damping structure

Abstract

A telescopic rod having an elastic damping structure is provided. [Solution] The device includes at least two axially expandable and contractible tubes fitted together from the inside to the outside, and an elastic damping structure between the two adjacent tubes. The two adjacent tubes are an inner tube 1 and an outer tube 2, respectively. The elastic damping structure includes a damping element and an elastic element 4. The damping element is fitted between the end of the inner tube and the inner wall of the outer tube, with one end of the elastic element abutting the damping element and the other end abutting the inner wall of the inner tube. The elastic force of the elastic element tightly bonds the inner tube, damping element, and outer tube, thereby generating frictional damping between the damping element and the inner wall of the outer tube, allowing the inner tube to slide along the inner wall of the outer tube through the damping element and maintain its relative position after sliding through the damping element. This design ensures that the inner tube, damping element, and outer tube are always tightly bonded together, eliminating any gaps between them. This eliminates the wobble caused by gaps between the inner tubes and provides more stable support.

Description

[Technical Field]

[0001] The present invention relates to the technical field of telescopic rods, and more particularly to telescopic rods with elastic damping structures. [Background technology]

[0002] Currently, telescopic rods are generally used in the industry for light-weight products such as selfie sticks. To provide stable support for such products, the damping positioning structure within the telescopic rod is required to provide stable and long-lasting resistance so that the telescopic rod can carry a mobile phone or sports camera. However, the resistance of the damping positioning structure should not be too large to avoid making it difficult to manually extend or retract the telescopic rod. Furthermore, because telescopic rods are primarily used to provide support for photography equipment, it is necessary to minimize the shaking and vibration of the telescopic rod caused by the fitting gap.

[0003] At present, there are two main types of damping and positioning structures for telescopic rods in the industry: One is to install a damping plate between two adjacent expandable pipes, and utilize the resistance generated when the damping plate is pressed and deformed between the two adjacent pipes to achieve damping positioning of the two pipes. The damping plate also eliminates the fitting gap between the two pipes, reducing vibration in the gap. However, damping plates are generally made of plastic, which has poor fatigue strength, so the resistance generated when the damping plate is pressed and deformed quickly decays. When used in high or low temperature outdoor environments, the resistance decays even more quickly, making it impossible to provide stable, long-lasting resistance.

[0004] The other is to use a spring to provide a stable elastic force to press the damping plate, and the damping plate creates a stable resistance between the two adjacent layers of tubes. However, in the current industry, this type of spring structure uses the spring to push the two damping plates apart, but the space used by the spring itself creates a gap between the two layers of tubes, making the telescopic rod more prone to shaking. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the technical problem to be solved by the present invention is to provide a telescopic rod with an elastic damping structure to overcome the drawbacks of the prior art, in that the damping structure inside the telescopic rod has a large fitting gap, is prone to shaking, and is not able to provide long-lasting, stable, and effective support for the components attached to it. [Means for solving the problem]

[0006] The technical solutions of the present invention to solve the above technical problems are as follows: A telescopic rod having an elastic damping structure, The device comprises at least two stages of tubular bodies fitted together from the inside to the outside in order and capable of expanding and contracting in the axial direction, and an elastic damping structure provided between two adjacent stages of the tubular bodies, wherein the two adjacent stages of the tubular bodies are an inner tube and an outer tube, respectively, and the elastic damping structure comprises a damping element and an elastic element, the damping element being provided between an end of the inner tube and the inner wall of the outer tube, one end of the elastic element abutting the damping element and the other end abutting the inner wall of the inner tube, and the elastic force of the elastic element causes the inner tube, the damping element and the outer tube to be tightly attached together, whereby the damping element generates frictional damping against the inner wall of the outer tube, and the inner tube slides along the inner wall surface of the outer tube through the damping element and is held in its relative position after sliding through the damping element.

[0007] Furthermore, the damping component includes a damping sleeve arranged between the outer wall of the inner pipe and the inner wall of the outer pipe, and a mounting bottom plate connected to the damping sleeve and extending toward the end face of the inner pipe, the mounting bottom plate having a mounting base that is inserted into the inner cavity of the inner pipe, one end of the elastic component abutting against the mounting base and the other end abutting against the inner wall of the inner pipe.

[0008] Furthermore, a mounting groove having an opening at one end is provided in the mounting base, and a portion of the elastic part is provided in the mounting groove, and another portion extends from the opening of the mounting groove and abuts against the inner wall of the inner tube.

[0009] Furthermore, a mounting hole is provided in the pipe wall of the inner pipe, and a positioning boss that protrudes outward and can be inserted into the mounting hole is provided on the inner wall of the damping sleeve.

[0010] Furthermore, the damping sleeve includes a first damping sleeve and a second damping sleeve located on the same ring and arranged independently of each other, the first damping sleeve and the second damping sleeve each have a separated gap between their two ends along the circumferential direction of the ring on which they are located, the inner tube has two mounting holes arranged opposite each other, the inner walls of the first damping sleeve and the second damping sleeve both have positioning bosses that protrude inward and can be inserted into the corresponding mounting holes, the mounting bottom plate is fixedly connected to the first damping sleeve, and the direction of elastic expansion and contraction of the elastic part is the same as the direction of the line connecting the two positioning bosses.

[0011] Furthermore, the first damping sleeve is provided with an elastic structure that rises inward and elastically abuts against the outer wall of the inner pipe.

[0012] Furthermore, the direction of the line connecting the two dividing intervals is perpendicular to the direction of the line connecting the two positioning bosses.

[0013] Furthermore, two positioning ribs are provided on the inner wall of the outer tube, positioned on the same annular ring as the damping sleeves, and the two positioning ribs pass through the divided spaces between the corresponding damping sleeves.

[0014] Furthermore, the mounting holes in the inner tube are opened in the positioning ribs of the inner tube.

[0015] Furthermore, a reinforcing boss is provided on the positioning boss of the damping sleeve so as to protrude coaxially with the positioning rib on the inner pipe, and the inner wall surface of the reinforcing boss protrudes from the inner wall surface of the inner pipe.

[0016] Furthermore, the positioning rib on the inner tube and the positioning rib on the outer tube are arranged at an angle of 90 degrees. [Effects of the Invention]

[0017] The technical solution of the present invention has the following advantages: 1. The telescopic rod with elastic damping structure provided by this invention has a damping element between the end of the inner tube and the inner wall of the outer tube, and an elastic element between the damping element and the inner wall of the inner tube. As the inner tube and the damping element slide along the inner wall of the outer tube, the elastic force of the elastic element is constantly acting on the inner tube and transmitted to the outer tube through the damping element, ensuring that the inner tube, damping element, and outer tube are always tightly attached to each other and completely eliminating any gaps between them. This eliminates the wobble that occurs when gaps exist between the inner tubes of the telescopic rod and provides more stable and long-lasting support for the imaging device supported by the telescopic rod. Compared to the prior art, which uses deformation of the plastic damping element to generate frictional damping, this embodiment avoids the resistance reduction caused by material fatigue and external temperature conditions and also helps provide more stable and long-lasting support for the imaging device supported by the telescopic rod.

[0018] 2. The telescopic rod with elastic damping structure provided by this invention has a damping sleeve connected to a mounting base plate extending toward the end face of the inner pipe, and a mounting base located inside the outer cavity of the inner pipe on the mounting base, with one end of the elastic element abutting the mounting base and the other end abutting the inner wall of the inner pipe. This arrangement allows the elastic element to be placed inside the inner pipe without using the space between the inner and outer pipes. Compared to the prior art where the elastic element and the damping element are both installed between the outer wall of the inner pipe and the inner wall of the outer pipe, this helps to eliminate the gap between the inner pipe, the damping sleeve, and the outer pipe, and eliminates vibration caused by the gap.

[0019] 3. The telescopic rod with elastic damping structure provided by the present invention has a structural form in which the elastic part is placed in a mounting groove in the mounting base. The mounting groove provides space for the elastic part to be mounted and can limit the direction of elastic expansion and contraction, which helps to improve the stability of the structure in which the elastic part is mounted.

[0020] 4. The telescopic rod with elastic damping structure provided by the present invention has a mounting hole on the wall of the inner pipe, and the damping sleeve is fitted into the mounting hole in the inner pipe by the positioning boss on the inner wall, which can realize the positioning, installation and fitting of the damping sleeve and the inner pipe.

[0021] 5. In the telescopic rod with elastic damping structure provided by the present invention, when the damping sleeve is composed of a first damping sleeve and a second damping sleeve that are independent of each other, the first damping sleeve and the second damping sleeve can be attached to the end of the inner tube respectively, making the assembly of the damping sleeve more convenient.

[0022] 6. The telescopic rod with elastic damping structure provided by this invention has an elastic structure on the first damping sleeve that rises inward and elastically abuts against the outer wall of the inner tube, one end of the elastic element abuts against the inner wall of the inner tube, thereby tightly bonding the inner tube, second damping sleeve, and outer tube together and eliminating any gaps between them. The other end of the elastic element abuts against the first damping sleeve via the mounting base, thereby tightly bonding the first damping sleeve to the outer tube and eliminating any gaps between them. However, generally, when the inner tube is bonded to the second damping sleeve by the action of an elastic part, the gap between the inner tube and the first damping sleeve on the other side will inevitably widen, and the existence of this gap may cause the telescopic rod to shake. However, in this embodiment, by providing the first damping sleeve with an elastic structure that rises inward, the elastic structure can elastically abut against the outer wall of the inner tube, thereby completely eliminating the gap between the inner tube and the first damping sleeve. Not only does this make the entire telescopic rod structure less likely to shake due to the gap, but even if there are small processing errors in the inner tube, outer tube, first damping sleeve, and second damping sleeve, the various parts can remain tightly bonded together. This greatly relaxes the requirements for controlling the dimensional accuracy of the inner tube, outer tube, first damping sleeve, and second damping sleeve, which helps to reduce costs.

[0023] 7. The telescopic rod with elastic damping structure provided by the present invention has two positioning ribs on the outer tube that respectively pass through two divided spaces on the damping sleeve, and the positioning ribs function to guide the movement of the damping sleeve, making it easier for the damping sleeve and inner tube to slide along the positioning ribs on the outer tube.

[0024] 8. In the telescopic rod with elastic damping structure provided by the present invention, the mounting hole on the inner tube is opened on the positioning rib of the inner tube, so that the mounting boss on the damping sleeve can be thickened according to the size of the positioning rib, thereby increasing the connection strength between the damping sleeve and the inner tube and making it more able to withstand the impact when the telescopic rod is repeatedly pulled out, which helps to extend the service life of the telescopic rod.

[0025] 9. In the telescopic rod with elastic damping structure provided by the present invention, the positioning ribs on the inner tube and the positioning ribs on the outer tube are arranged at a 90-degree angle. This increases the overall strength and stability of the telescopic rod when it is extended. Compared to the conventional telescopic rod in which all ribs on multiple tubes are arranged in the same direction and position, the tubes in the telescopic rod have less support in the direction where there are no ribs, which makes them more susceptible to shaking.

[0026] 10. Compared with the prior art, which controls the magnitude of the generated damping force by precisely controlling the local deformation of the damping components, the telescopic rod with elastic damping structure provided by the present invention significantly relaxes the requirements for controlling the dimensional accuracy of the inner diameter of each tube body and the inner and outer diameters of the damping components, making the entire telescopic rod more convenient and easier to process and produce, reducing production costs, and providing stable damping for a long period of time in various harsh environments, ensuring the use performance of the product. [Brief explanation of the drawings]

[0027] In order to more clearly describe the specific embodiments of the present invention or the technical solutions of the prior art, the drawings to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Needless to say, the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings from these drawings without inventive work.

[0028] [Figure 1]1 is a schematic three-dimensional structural view of a telescopic rod with an elastic damping structure according to an embodiment of the present invention; [Figure 2] 1 is a cross-sectional view of a first surface of a telescopic rod with an elastic damping structure according to an embodiment of the present invention, with some of the structure omitted to show only the connection relationship between the multiple tube layers and the elastic damping structure. [Figure 3] FIG. 3 is an enlarged view of a portion A in FIG. 2. [Figure 4] 1 is a cross-sectional view of a second surface of a telescopic rod with an elastic damping structure according to an embodiment of the present invention, with some of the structure omitted to show only the connection relationship between the multiple tube layers and the elastic damping structure. [Figure 5] FIG. 5 is an enlarged view of a portion B in FIG. [Figure 6] 1 is a schematic three-dimensional structural diagram of a three-layer elastic damping structure according to an embodiment of the present invention; [Figure 7] 1 is a schematic three-dimensional structural view of a damping element according to an embodiment of the present invention; [Explanation of symbols]

[0029] 100 Telescopic Rod 1 inner tube 11 Mounting holes 2 outer tube 3 Damping components 4 Elastic parts 5 Positioning rib 31 Damping sleeve 31a First damping sleeve 31b Second damping sleeve 311 Positioning boss 312 Reinforcement boss 313 Separation Interval 314 Elastic Structure 32 Mounting base plate 33 Mounting base DETAILED DESCRIPTION OF THE INVENTION

[0030] The technical solutions of the present invention will be described below clearly and completely with reference to the drawings. Needless to say, the described embodiments are not all embodiments but only some embodiments of the present invention. All other embodiments that a person skilled in the art can obtain based on the embodiments of the present invention without inventive work fall within the scope of protection of the present invention.

[0031] In describing this invention, the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the drawings, and are intended to facilitate and simplify the description of this invention. However, these terms do not express or imply that the devices or components to which they refer must necessarily have a specific orientation, be configured, or operate in a specific direction, and therefore should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are merely used for descriptive purposes and should not be construed as expressing or implying relative importance.

[0032] In describing the present invention, unless otherwise clearly specified and limited, the terms "attach," "connect," and "couple" should be understood in a broad sense. For example, they may refer to a fixed connection, a detachable connection, or an integral connection. They may also refer to a mechanical connection or an electrical connection. They may also refer to a direct connection, an indirect connection via an intermediary, or two components communicating internally. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0033] 1 to 7 show a telescopic rod with an elastic damping structure, and the telescopic rod 100 includes multiple stages of tubular bodies that are fitted together in order from the inside to the outside and are extendable and contractible in the axial direction, and an elastic damping structure provided between two adjacent stages of the tubular bodies. From the viewpoint of ease of description, of the two adjacent stages of tubular bodies, the tube located in the inner layer will be referred to as inner tube 1, and the tube located in the outer layer will be referred to as outer tube 2, and the inner tube 1 and outer tube 2 are relative concepts, so that the inner tube 1 is inner tube 1 relative to the tube in the outer layer, but is outer tube 2 relative to the tube in the inner layer, and the same applies to the outer tube 2.

[0034] In this embodiment, the elastic damping structure includes a damping element 3 and an elastic element 4. The damping element 3 is disposed between the end of the inner pipe 1 and the inner wall of the outer pipe 2, one end of the elastic element 4 abuts against the damping element 3 and the other end abuts against the inner wall of the inner pipe 1, and the elastic force of the elastic element 4 causes the inner pipe 1, the damping element 3 and the outer pipe 2 to be tightly attached together, so that the damping element 3 generates frictional damping against the inner wall of the outer pipe 2, and the inner pipe 1 slides along the inner wall surface of the outer pipe 2 through the damping element 3 and is maintained in its relative position after sliding through the damping element 3. As the inner tube 1 and the damping element 3 slide along the inner wall of the outer tube 2, the elastic force of the elastic element 4 is constantly acting on the inner tube 1 and transmitted to the outer tube 2 via the damping element 3, ensuring that the inner tube 1, damping element 3, and outer tube 2 are always tightly attached together, completely eliminating any fitting gaps between them. The telescopic rod 100 eliminates any shaking that would occur due to fitting gaps between the internal tubes, and can provide more stable and long-lasting support for the imaging device supported by the telescopic rod 100. This embodiment, in which the elastic element 4 applies an elastic force to the damping element 3 to generate frictional damping on the inner wall of the outer tube 2, utilizes the deformation of the plastic damping element 3 itself to generate frictional damping, avoiding resistance reduction due to material fatigue and external temperature conditions compared to the prior art embodiment, and also contributing to more stable and long-lasting support for the imaging device supported by the telescopic rod 100.

[0035] In some embodiments of this embodiment, the damping element 3 includes a damping sleeve 31 disposed between the outer wall of the inner pipe 1 and the inner wall of the outer pipe 2, and a mounting base plate 32 connected to the damping sleeve 31 and extending toward the end face of the inner pipe 1, the mounting base plate 32 being provided with a mounting base 33 disposed within the lumen of the inner pipe 1. One end of the elastic element 4 abuts against the mounting base 33, and the other end abuts against the inner wall of the inner pipe 1, and the elastic element 4 is specifically a spring. By installing it in this manner, the elastic element 4 can be placed within the lumen of the inner pipe 1 without using the space between the inner pipe 1 and the outer pipe 2. Compared to the prior art embodiment in which the elastic element 4 and the damping element 3 are both installed between the outer wall of the inner pipe 1 and the inner wall of the outer pipe 2, this helps to eliminate gaps between the inner pipe 1, the damping sleeve 31, and the outer pipe 2, thereby eliminating vibrations caused by the gaps. In another alternative embodiment, there may be no mounting bottom plate 32 or mounting base 33 on the damping sleeve 31, and one end of the elastic part 4 passes through the notch in the inner tube 1 and directly abuts against the damping sleeve 31, and the other end abuts against the inner wall of the inner tube 1.

[0036] In some embodiments of this embodiment, the mounting bottom plate 32, mounting base 33, and damping sleeve 31 are an integrally molded structure, with a notch provided in the pipe wall at the lower end of the inner pipe 1, and the mounting base 33 being integrally molded with the inner wall of the damping sleeve 31 and extending through the notch in the inner pipe 1 toward the inner cavity of the inner pipe 1. A mounting groove with a side opening at one end is provided in the mounting base 33, with a gap between the side opening of the mounting base 33 and the pipe wall of the inner pipe 1, with a portion of the elastic element 4 being disposed in the mounting groove and another portion extending from the opening of the mounting groove to abut against the inner wall of the inner pipe 1. In a structural form in which the elastic element 4 is disposed in the mounting groove in the mounting base 33, the mounting groove provides a space for the elastic element 4 to be mounted and can limit the direction of elastic expansion and contraction, thereby improving the stability of the structure in which the elastic element 4 is mounted.

[0037] In some embodiments of this embodiment, a mounting hole 11 is provided in the pipe wall of the inner pipe 1, and a positioning boss 311 that protrudes outward and can be inserted into the mounting hole 11 is integrally formed on the inner wall of the damping sleeve 31. The damping sleeve 31 is fitted into the mounting hole 11 in the inner pipe 1 by the positioning boss 311 on the inner wall, which enables the damping sleeve 31 and the inner pipe 1 to be positioned, attached, and fitted together.

[0038] In some embodiments of this embodiment, the damping sleeve 31 includes a first damping sleeve 31a and a second damping sleeve 31b located on the same ring and arranged independently of each other, the first damping sleeve 31a and the second damping sleeve 31b each have a separating gap 313 between their two circumferential ends, the inner pipe 1 has two mounting holes 11 arranged opposite each other, the first damping sleeve 31a and the second damping sleeve 31b each have a positioning boss 311 on the inner wall that protrudes inward and can be inserted into the corresponding mounting hole 11, and the elastic element 4 elastically expands and contracts in the same direction as the line connecting the two positioning bosses 311. This arrangement allows the first damping sleeve 31a and the second damping sleeve 31b to be attached to the ends of the inner pipe 1, respectively, making the assembly of the damping sleeve 31 and the inner pipe 1 more convenient.

[0039] Furthermore, the mounting bottom plate 32, mounting base 33, and damping sleeve 31 are integrally molded, and an elastic structure 314 is integrally molded with the first damping sleeve 31a, which rises inward to elastically abut against the outer wall of the inner pipe 1. One end of the elastic part 4 abuts against the inner wall of the inner pipe 1, thereby tightly bonding the inner pipe 1, second damping sleeve 31b, and outer pipe 2 together, eliminating any gaps between the inner pipe 1, second damping sleeve 31b, and outer pipe 2, and the other end of the elastic part 4 abuts against the first damping sleeve 31a via the mounting base 33, thereby tightly bonding the first damping sleeve 31a to the outer pipe 2, eliminating any gaps between the first damping sleeve 31a and the outer pipe 2. However, generally, when the inner pipe 1 is bonded to the second damping sleeve 31b by the action of the elastic element 4, a gap between the inner pipe 1 and the first damping sleeve 31a on the other side is inevitably enlarged, and the existence of this gap may cause the telescopic rod to vibrate. In the present application, the first damping sleeve 31a is provided with an elastic structure 314 that rises inward, so that the elastic structure 314 can elastically abut against the outer wall of the inner pipe 1, thereby completely eliminating the gap between the inner pipe 1 and the first damping sleeve 31a. Not only does this make it less likely for the entire telescopic rod structure to vibrate due to a gap, but it also ensures that the components are tightly bonded together even if there are small processing errors in the inner pipe 1, outer pipe 2, first damping sleeve 31a, and second damping sleeve 31b. This greatly relaxes the requirements for controlling the dimensional accuracy of the inner pipe 1, outer pipe 2, first damping sleeve 31a, and second damping sleeve 31b, and helps reduce costs.

[0040] In some embodiments of this embodiment, the inner wall of the outer tube 2 is provided with two positioning ribs 5 located on the same annulus as the damping sleeve 31, and the two positioning ribs 5 each pass through the separation gap 313 between the corresponding damping sleeves 31. The positioning ribs 5 function to guide the movement of the damping sleeves 31, making it easier for the damping sleeve 31 and the inner tube 1 to slide along the positioning ribs 5 on the outer tube 2.

[0041] In some embodiments of this embodiment, the mounting hole 11 on the inner pipe 1 is opened in the positioning rib 5 of the inner pipe 1, and a reinforcing boss 312 is protruded from the positioning boss 311 of the damping sleeve 31 coaxially with the positioning rib 5 of the inner pipe 1, with the inner wall surface of the reinforcing boss 312 protruding from the inner wall surface of the inner pipe 1. By installing it in this way, the mounting boss of the damping sleeve 31 can be made thicker according to the dimension of the positioning rib 5, which increases the connection strength between the damping sleeve 31 and the inner pipe 1 and makes it more able to withstand impacts when the telescopic rod 100 is repeatedly pulled out, which helps to extend the service life of the telescopic rod 100.

[0042] In some embodiments of this embodiment, the direction of the line connecting the two separating gaps 313 is perpendicular to the direction of the line connecting the two positioning bosses 311, and the positioning ribs 5 on the inner tube 1 and the positioning ribs 5 on the outer tube 2 are arranged at an angle of 90 degrees. This arrangement improves the overall strength and stability of the telescopic rod 100 when it is extended, and avoids the problem that, compared to the conventional embodiment in which all ribs on multiple tubes in the telescopic rod 100 are arranged in the same direction and position, the tubes 1 in the telescopic rod 100 receive less support in directions where there are no ribs, making them more susceptible to shaking.

[0043] In summary, the telescopic rod with elastic damping structure provided in the embodiment of the present invention has a damping element 3 disposed between the end of the inner tube 1 and the inner wall of the outer tube 2, and an elastic element 4 disposed between the damping element 3 and the inner wall of the inner tube 1. As the inner tube 1 and the damping element 3 slide along the inner wall of the outer tube 2, the elastic force of the elastic element 4 is constantly acting on the inner tube 1 and transmitted to the outer tube 2 through the damping element 3, ensuring that the inner tube 1, damping element 3, and outer tube 2 are always tightly attached together, completely eliminating any gaps between the three. This eliminates the shaking that occurs when gaps exist between the internal tubes of the telescopic rod 100, and provides longer-lasting, more stable support for the imaging device supported by the telescopic rod 100. This embodiment, in which the elastic element 4 applies an elastic force to the damping element 3 to generate frictional damping on the inner wall of the outer tube 2, utilizes the deformation of the plastic damping element 3 itself to generate frictional damping. Compared to the prior art embodiment, this embodiment avoids the reduction in resistance caused by material fatigue and external temperature conditions, and also helps provide longer-lasting, more stable support for the imaging device supported by the telescopic rod 100. Furthermore, compared to the prior art embodiment, in which the magnitude of the generated damping force is controlled by precisely controlling the amount of local deformation of the damping element 3, this embodiment significantly relaxes the requirements for controlling the dimensional accuracy of the inner diameter of each tube and the inner and outer diameters of the damping element 3. This makes the processing and production of the entire telescopic rod 100 more convenient and easier, reduces production costs, and ensures product performance by providing stable damping over a long period of time in a variety of harsh environments.

[0044] It goes without saying that the above examples are not intended to limit the scope of the embodiments, but are merely examples provided for clarity. Those skilled in the art may make various modifications or changes based on the above description. It is not necessary to, and cannot, cover all embodiments. Any obvious modifications or changes derived therefrom are also within the scope of protection of the present invention.

Claims

1. A telescopic rod having an elastic damping structure, The invention comprises at least two stages of pipe bodies fitted in order from the inside to the outside and capable of expanding and contracting in the axial direction, and an elastic damping structure provided between the two adjacent stages of pipe bodies, The pipe bodies of two adjacent stages are an inner pipe (1) and an outer pipe (2), The elastic damping structure includes a damping element (3) and an elastic element (4), The damping component (3) includes two damping sleeve seats, and a portion of the two damping sleeve seats is provided between the inner wall of the inner pipe (1) and the inner wall of the outer pipe (2); The damping sleeve seat further includes a mounting bottom plate connected to each of the two damping sleeve seats and extending toward an end face of the inner pipe, and a mounting base provided on the mounting bottom plate and extending to the lumen of the inner pipe, the elastic component is located entirely within the mounting base and within the lumen of the inner tube, not using the space between the inner tube and the outer tube; one end of the elastic part is adapted to be held by a mounting base of a first damping sleeve sheet of the two damping sleeve sheets, and the other end is adapted to be held by a part of the inner wall of the inner pipe or a mounting base of a second damping sleeve sheet of the two damping sleeve sheets; One end of the elastic part (4) abuts against the damping part (3), and the other end abuts against a part of the inner pipe (1); The elastic force of the elastic part (4) makes the inner pipe (1), the damping part (3) and the outer pipe (2) adhere tightly together; As a result, the damping element (3) generates friction damping against the inner wall of the outer tube (2), The inner pipe (1) slides along the inner wall surface of the outer pipe (2) through the damping member (3), and is held in a relative position after sliding through the damping member (3). An extendable rod having an elastic damping structure characterized by:

2. 2. The telescopic rod with elastic damping structure according to claim 1, wherein the damping component (3) comprises a damping sleeve (31) disposed between the outer wall of the inner pipe (1) and the inner wall of the outer pipe (2), and a mounting bottom plate (32) connected to the damping sleeve (31) and extending toward the end face of the inner pipe (1), the mounting bottom plate (32) having a mounting base (33) disposed in the inner cavity of the inner pipe (1), one end of the elastic component (4) abutting against the mounting base (33) and the other end abutting against the inner wall of the inner pipe (1).

3. 3. The telescopic rod with elastic damping structure according to claim 2, characterized in that a mounting groove having an opening at one end is provided in the mounting base (33), a portion of the elastic part (4) is provided in the mounting groove, and another portion extends from the opening of the mounting groove to abut against the inner wall of the inner tube (1).

4. The telescopic rod with elastic damping structure according to claim 2, characterized in that an attachment hole (11) is provided in the pipe wall of the inner pipe (1), and a positioning boss (311) that protrudes outward and can be inserted into the attachment hole (11) is provided on the inner wall of the damping sleeve (31).

5. 5. The telescopic rod with elastic damping structure according to claim 4, wherein the damping sleeve (31) comprises a first damping sleeve (31a) and a second damping sleeve (31b) which are positioned on the same ring and are provided independently of each other, the first damping sleeve (31a) and the second damping sleeve (31b) each have a separating gap (313) between their two ends along the circumferential direction of the ring on which they are positioned, the inner tube (1) has two mounting holes (11) which are provided opposite each other, the first damping sleeve (31a) and the second damping sleeve (31b) each have a positioning boss (311) which protrudes inward and can be inserted into the corresponding mounting hole (11) on the inner wall, the mounting bottom plate (32) is fixedly connected to the first damping sleeve (31a), and the direction of elastic expansion and contraction of the elastic part (4) is the same as the direction of a line connecting the two positioning bosses (311).

6. The telescopic rod having an elastic damping structure according to claim 5, characterized in that the first damping sleeve (31a) is provided with an elastic structure (314) that rises inward and elastically abuts against the outer wall of the inner tube (1).

7. The telescopic rod with elastic damping structure according to claim 5, characterized in that the direction of the line connecting the two dividing intervals (313) is perpendicular to the direction of the line connecting the two positioning bosses (311).

8. The telescopic rod having an elastic damping structure according to claim 7, characterized in that the inner wall of the outer tube (2) is provided with two positioning ribs (5) located on the same ring as the damping sleeves (31), and the two positioning ribs (5) each pass through the divided gaps (313) between the corresponding damping sleeves (31).

9. The telescopic rod with elastic damping structure as claimed in claim 8, characterized in that the mounting hole (11) in the inner tube (1) is opened in the positioning rib (5) of the inner tube (1).

10. 10. The telescopic rod having an elastic damping structure according to claim 9, characterized in that a reinforcing boss (312) is protruded from the positioning boss (311) of the damping sleeve (31) coaxially with the positioning rib (5) on the inner tube (1), and the inner wall surface of the reinforcing boss (312) protrudes from the inner wall surface of the inner tube (1).

11. The telescopic rod with elastic damping structure according to claim 8, characterized in that the positioning rib (5) on the inner tube (1) and the positioning rib (5) on the outer tube (2) are arranged at an angle of 90 degrees.

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