An improved telescopic pole for photographic equipment

Abstract

Telescopic pole, including: an elastic damping structure with at least two pipe sections, wherein the at least two sections are successively pushed into one another from the inside out; wherein the elastic damping structure is arranged between two adjacent pipe sections; wherein the two adjacent pipe sections comprise an inner pipe and an outer pipe; wherein the elastic damping structure comprises a damping element and an elastic element; wherein the damping element is arranged between an end of the inner tube and an inner wall of the outer tube; wherein the damping element comprises: two damping sleeves, wherein part of the two damping sleeves is arranged between the outer wall of the inner tube and the inner wall of the outer tube, a mounting base plate connected to each of the two damping sleeves and extending to the end face of the inner tube, and a mounting seat projecting into an interior of the inner tube and arranged on the mounting base plate; wherein the elastic element in the mounting seat is arranged entirely within the interior of the inner tube, without occupying any space between the inner and outer tubes; wherein one end of the elastic element is designed to rest against the mounting seat of a first of the two damping sleeves, and the other end is designed to rest against a part of the inner wall of the inner tube or the mounting seat of a second of the two damping sleeves; wherein an elastic force of the elastic element is designed such that it allows the inner tube, the damping element and the outer tube to lie close together and forms frictional damping with the damping element and the inner wall of the outer tube; wherein the inner tube is designed such that it slides over the damping element along an inner wall surface of the outer tube and remains in a relative position after sliding over the damping element.

Description

TECHNICAL AREA

[0001] Aspects of the invention relate generally to telescopic rods. In particular, embodiments of the invention relate to a telescopic rod with an elastic damping structure. BACKGROUND

[0002] Currently, telescopic poles or tripods are predominantly used in the industry for selfie stick applications with light loads. To ensure stable support for such products, the damping and positioning structure within the telescopic pole must, on the one hand, be able to provide a stable and consistent counterforce to meet the load-bearing requirements of mobile phones and action cameras; on the other hand, the resistance of the damping and positioning structure must not be too great, so as not to impede manual extension and retraction of the telescopic pole with excessive resistance. Furthermore, the telescopic pole primarily serves to support photographic equipment, so vibrations and wobbling caused by play between components of the telescopic pole must be minimized.

[0003] Currently, the industry mainly uses two types of damping and positioning structures in telescopic poles:

[0004] The first type uses a damping plate between two adjacent sections of telescopic tubes. It utilizes the resistance generated by the compression and deformation of the damping plate between the two tubes to achieve damping positioning of the two tube sections. This arrangement also allows the damping plate to eliminate play between the two tube sections, thus reducing play-related wobble. However, since the damping plate is generally made of plastic, and plastic has low fatigue strength, the resistance generated by the compression deformation of the damping plate deteriorates rapidly over time. When used in high- or low-temperature environments, the resistance deteriorates even more quickly, preventing the provision of a stable and lasting counterforce for the intended application.

[0005] The second type uses a spring to provide a stable elastic force that compresses the damping plate, causing it to create a stable resistance between the two adjacent tube layers. While the spring in the currently common industry design does cause the two damping plates to spread apart, the space occupied by the spring itself creates play between the two tube layers, making the telescopic rod more prone to vibration. SUMMARY

[0006] Aspects of the invention therefore attempt to solve or overcome the disadvantages of the prior art, according to which the internal damping structure of the telescopic rod has a large amount of play, causing it to vibrate easily during use, and making it difficult to effectively and stably support the components installed on it during continuous operation.

[0007] To solve the aforementioned technical problems, aspects of the invention provide at least one of the following technical solutions:

[0008] A telescopic rod with an elastic damping structure comprises at least two tube sections that are sequentially inserted into one another from the inside out and are axially telescoping. In one embodiment, the elastic damping structure can be arranged between two adjacent tube sections. In another embodiment, the two adjacent tube sections can comprise an inner tube and an outer tube. In some embodiments, the elastic damping structure can comprise a damping element and an elastic element. In one aspect, the damping element can be arranged between one end of the inner tube and the inner wall of the outer tube. In some embodiments, one end of the elastic element can rest against the damping element and the other end against the inner wall of the inner tube.In some embodiments, the elastic force of the elastic element can cause the inner tube, the damping element, and the outer tube to lie close together. In some embodiments, the damping element and the inner wall of the outer tube form frictional damping; the inner tube can slide over the damping element along the inner wall surface of the outer tube and, after sliding over the damping element, remain in the relative position.

[0009] Furthermore, in some embodiments, the damping element can comprise a damping sleeve arranged between the outer wall of the inner tube and the inner wall of the outer tube. In some embodiments, the telescopic rod can have a mounting base plate connected to the damping sleeve, extending towards the end face of the inner tube. In one embodiment, the mounting base plate can include a mounting seat projecting into the interior of the inner tube. In one aspect, one end of the elastic element can rest against the mounting seat and the other end against the inner wall of the inner tube.

[0010] Furthermore, in some embodiments, a mounting slot with an opening at one end can be provided in the mounting seat. In some embodiments, part of the elastic element can be arranged in the mounting slot, and the other part can protrude from the opening of the mounting slot and rest against the inner wall of the inner tube.

[0011] Furthermore, in some embodiments a mounting hole may be provided on the pipe wall of the inner tube, and an outwardly projecting positioning projection may be provided on the inner wall of the damping sleeve, which extends into the mounting hole.

[0012] Furthermore, in some embodiments, the damping sleeve can comprise a first damping sleeve and a second damping sleeve, which lie on the same circular ring and are arranged independently of each other. In one aspect, the first damping sleeve and the second damping sleeve can each have a separating gap extending along the circumferential direction of the circular ring between two ends. In some embodiments, two mounting openings can be provided on the inner tube, arranged opposite each other. In one aspect, the inner walls of the first and the second damping sleeve can each have positioning projections that project inwards and into the corresponding mounting openings. In some embodiments, the mounting base plate can be rigidly connected to the first damping sleeve, and the elastic expansion and compression direction of the elastic element can coincide with the connection direction of the two positioning projections.

[0013] Furthermore, in some embodiments, the first damping sleeve can comprise an inwardly curved elastic structure that elastically rests against the outer wall of the inner tube.

[0014] Furthermore, in some embodiments, the connection direction of the two separating gaps can be arranged perpendicular to the connection direction of the two positioning projections.

[0015] Furthermore, in some embodiments, the inner wall of the outer tube can include two positioning ribs that lie on the same circular ring as the damping sleeve. In some embodiments, the two positioning ribs can penetrate the separating gaps between the damping sleeves at the corresponding locations.

[0016] Furthermore, in some embodiments, the mounting hole on the inner tube can be located on the positioning rib of the inner tube.

[0017] Furthermore, in some embodiments, a reinforcing projection can be provided on the positioning projection of the damping sleeve, which is arranged coaxially with the positioning rib on the inner tube, wherein the inner wall surface of the reinforcing projection protrudes beyond the inner wall surface of the inner tube.

[0018] Furthermore, in some embodiments, the positioning rib on the inner tube and the positioning rib on the outer tube can be arranged at an angle of approximately 90 degrees to each other.

[0019] Aspects of the invention may include one or more of the following advantages: 1. The telescopic rod with an elastic damping structure may include a damping element arranged between the end of the inner tube and the inner wall of the outer tube. In some embodiments, an elastic element may be arranged 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, in some embodiments the elastic force of the elastic element may act on the inner tube and be transmitted to the outer tube via the damping element, so that the inner tube, the damping element, and the outer tube are in close contact with each other.This allows for the perfect elimination of play, thereby overcoming vibrations of the telescopic pole caused by the play between the internal tube sections and providing a more durable and stable support for the recording or photographic equipment mounted on the telescopic pole. Compared to the prior art method, where frictional damping is generated by the deformation of the plastic damping element itself, the approach of generating frictional damping by applying an elastic force to the damping element avoids the reduction in resistance due to material fatigue and external temperature influences, and also promotes a long-term, durable, and stable support for the recording equipment. 2. The telescopic rod with elastic damping structure has a mounting base plate that extends to the end face of the inner tube by connecting the damping sleeve to the mounting base plate. A mounting seat projecting into the interior of the inner tube is provided on the mounting base plate. In some embodiments, one end of the elastic element rests against the mounting seat and the other end against the inner wall of the inner tube. This allows the elastic element to be positioned inside the inner tube without occupying the space between the inner and outer tubes, thus eliminating play between the inner tube, damping sleeve, and outer tube, and thus eliminating the wobble caused by this play. These are advantages over the prior art, in which both the elastic element and the damping element are located between the outer wall of the inner tube and the inner wall of the outer tube. 3. The telescopic rod with elastic damping structure incorporates an elastic element in a mounting slot in the mounting seat. The mounting slot provides an installation space for the elastic element and limits its elastic expansion, thus improving the stability of the elastic element's installation. 4. The telescopic rod with elastic damping structure provides a mounting hole on the wall of the inner tube; the damping sleeve achieves the positioning and mounting adjustment of the damping sleeve and the inner tube by aligning the positioning projection on the inner wall with the mounting hole on the inner tube. 5. The telescopic rod with elastic damping structure features a damping sleeve consisting of a first and a second damping sleeve, which are independent of each other. The first and second damping sleeves can each be installed at the ends of the inner tube, simplifying the assembly operation. 6. The telescopic rod with elastic damping structure features an inwardly curved elastic structure on the first damping sleeve, which rests elastically against the outer wall of the inner tube. One end of the elastic element rests against the inner wall of the inner tube, ensuring that the inner tube, the second damping sleeve, and the outer tube fit snugly together, eliminating any play between them. The other end of the elastic element rests against the first damping sleeve via the mounting seat, ensuring that the first damping sleeve and the outer tube fit snugly together, again eliminating any play between them.Normally, the contact of the inner tube against the second damping sleeve, under the influence of the elastic element, would force the inner tube against the first damping sleeve on the other side; increasing the play between the sleeves could also lead to wobble in the telescopic rod. This solution therefore incorporates an inwardly curved elastic structure on the first damping sleeve, which elastically contacts the outer wall of the inner tube, thus strategically eliminating the play between the inner tube and the first damping sleeve. This not only reduces the tendency of the entire telescopic rod structure to vibrate due to play, but also maintains a tight fit of the components even with minor manufacturing or movement errors in the inner tube, outer tube, first and second damping sleeves, thereby significantly reducing the dimensional accuracy requirements of these parts and lowering costs. 7. The telescopic rod with elastic damping structure has two positioning ribs on the outer tube that penetrate the two separating gaps on the damping sleeve; the positioning ribs guide the movement of the damping sleeve and facilitate the sliding of the damping sleeve and the inner tube along the positioning ribs on the outer tube. 8. The telescopic rod with elastic damping structure has a mounting hole provided on the inner tube at the positioning rib of the inner tube, so that the mounting projection on the damping sleeve can be thickened depending on the size of the positioning rib; this increases the connection strength between the damping sleeve and the inner tube, making it more resistant to the impacts that occur when the telescopic rod is repeatedly extended, thus improving the service life of the telescopic rod. 9. The telescopic pole with elastic damping structure features a positioning rib on the inner tube and a positioning rib on the outer tube, arranged at approximately 90 degrees to each other. This increases the overall strength and stability of the telescopic pole when extended. Compared to the arrangement of all ribs in the same direction on the multi-section tube bodies of conventional telescopic poles, this avoids the problem of the inner tube of the telescopic pole being weakly supported and prone to wobbling in the direction without ribs. 10. Compared to the prior art, which regulates the magnitude of the damping force through highly precise control of the local deformation of the damping element, the telescopic rod with an elastic damping structure significantly reduces the requirements for the dimensional accuracy of the inner diameters of the individual tube sections and the inner and outer diameters of the damping element. The overall machining and production of the telescopic rod is simpler and more cost-effective, and it can provide stable damping over a long period in various harsh environments, thus ensuring product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the specific embodiments of the present invention or the prior art technical solution, the drawings necessary for the specific embodiment or the description of the prior art are briefly introduced below. Obviously, the drawings described below represent some embodiments of the present invention. A person skilled in the art can derive further drawings from these drawings without any inventive step. Fig. Figure 1 is a schematic representation of the three-dimensional structure of the telescopic rod with elastic damping structure according to an embodiment of the invention; Fig. Figure 2 is a cross-section of a first section plane of the telescopic rod with elastic damping structure according to an embodiment of the invention, wherein part of the structure is hidden and only the connection relationship between the multilayer tube body and the elastic damping structure is shown; Fig. Figure 3 is an enlarged view of point A in Fig. 2; Fig. Figure 4 is a cross-section of a second section plane of the telescopic rod with elastic damping structure according to an embodiment of the invention, wherein part of the structure is hidden and only the connection relationship between the multilayer tube body and the elastic damping structure is shown; Fig. Figure 5 is an enlarged view of point B in Fig. 4; Fig. Figure 6 is a schematic representation of the three-dimensional structure of the three-layer elastic damping structure according to an embodiment of the invention; Fig. Figure 7 is a schematic representation of the three-dimensional structure of the damping element according to one embodiment of the invention.

[0021] Reference numeral list: 100 Telescopic rod; 1 Inner tube; 11 Mounting hole; 2 Outer tube; 3 Damping element; 4 Elastic element; 5 Positioning rib; 31 Damping sleeve; 31a First damping sleeve; 31b Second damping sleeve; 311 Positioning projection; 312 Reinforcing projection; 313 Separating gap; 314 Elastic structure; 32 Mounting base plate; 33 Mounting seat. DETAILED DESCRIPTION

[0022] The technical solution to the aspects of the present invention is clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments represent a subset of the embodiments of the present invention and not all embodiments. Based on the embodiments of the present invention, all other embodiments that could be obtained by a person skilled in the art without inventive step fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the orientation or positional relationship designated by the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inside," "outside," etc., is based on the orientation or positional relationship as depicted in the accompanying drawings. This serves only to simplify the description of the present invention and does not constitute a requirement that the device or element in question must be in a specific orientation, be designed, or be operated in a specific orientation. No corresponding limitation of the present invention is thereby implied. Furthermore, the terms "first," "second," and "third" serve only for descriptive purposes and do not imply any conclusions about their relative significance.

[0024] The description of the present invention should further clarify that, unless otherwise clearly stated and limited, the terms "mounted," "connected," and "coupled" are to be understood in a broad sense; they may, for example, mean a fixed connection, a detachable connection, or an integral connection; they may represent a mechanical or electrical connection; they may be a direct connection or indirectly connected via an intermediate medium; they may also denote the internal communication between two components. The specific meanings of these terms in the present invention will be clear to the person skilled in the art from the context.

[0025] As in the Fig.Figures 1-7 show a telescopic rod with an elastic damping structure according to one embodiment. In some embodiments, the telescopic rod 100 comprises several tubes that are sequentially inserted into one another from the inside out and are axially telescoping, as well as an elastic damping structure arranged between two adjacent tubes. For the sake of simplicity, in one example, the inner of the two adjacent tubes is referred to as the inner tube 1 and the outer tube as the outer tube 2. The inner tube 1 and the outer tube 2 are relative. In some embodiments, the inner tube 1 is the inner tube relative to the outer tube, but the outer tube 2 is relative to an even inner tube; the same applies to the outer tube 2.

[0026] In one embodiment, the elastic damping structure comprises a damping element 3 and an elastic element 4. In some embodiments, the damping element 3 is arranged between the end of the inner tube 1 and the inner wall of the outer tube 2. In one embodiment, one end of the elastic element 4 can rest against the damping element 3 and the other end against the inner wall of the inner tube 1. In some embodiments, the elastic force of the elastic element 4 can cause the inner tube 1, the damping element 3, and the outer tube 2 to lie close together, so that the damping element 3 and the inner wall of the outer tube 2 form frictional damping. In another embodiment, the inner tube 1 slides over the damping element 3 along the inner wall of the outer tube 2 and remains in the relative position after sliding over 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 can act on the inner tube 1 and be transferred to the outer tube 2 via the damping element 3, so that the inner tube 1, damping element 3 and outer tube 2 are in close contact with each other.

[0027] In such an embodiment, the fit between these three parts is perfectly eliminated, thereby overcoming the vibrations of the telescopic rod 100 caused by the fit between the inner tube bodies. In some embodiments, a more durable and stable support is provided for the receiving device supported on the telescopic rod 100.In contrast to the prior art method in which the frictional damping is generated by the deformation of a damping element 3 made of plastic, the present invention provides to exert an elastic force on the damping element 3 by means of the elastic element 4 in order to form frictional damping with the inner wall of the outer tube 2; this avoids the decrease in resistance caused by material fatigue and external temperature influences, and also promotes a more durable and stable support of the receiving device on the telescopic rod 100.

[0028] In some embodiments, the damping element 3 comprises a damping sleeve 31, which is arranged between the outer wall of the inner tube 1 and the inner wall of the outer tube 2, as well as a mounting base plate 32, which is connected to the damping sleeve 31 and extends to the end face of the inner tube 1, and a mounting seat 33, which extends into the interior of the inner tube 1 and is arranged on the mounting base plate 32. In some embodiments, one end of the elastic element 4 rests against the mounting seat 33 and the other end against the inner wall of the inner tube 1. In another embodiment, the elastic element 4 can be a spring. With such an arrangement, in some embodiments the elastic element 4 can be positioned in the interior of the inner tube 1 without occupying the space between the inner tube 1 and the outer tube 2.In contrast to the prior art, in which both the elastic element 4 and the damping element 3 are arranged between the outer wall of the inner tube 1 and the inner wall of the outer tube 2, this contributes to eliminating the play between the inner tube 1, the damping sleeve 31, and the outer tube 2, and thus to eliminating the resulting wobble. In alternative embodiments, the damping sleeve 31, the mounting base plate 32, and the mounting seat 33 are not necessarily required; one end of the elastic element 4 can be passed through a recess in the inner tube 1 and rest directly against the damping sleeve 31, while the other end rests against the inner wall of the inner tube 1.

[0029] In some embodiments, the mounting base plate 32, the mounting seat 33, and the damping sleeve 31 are formed integrally; a recess is provided in the tube wall at the lower end of the inner tube 1, and the mounting seat 33 is formed integrally with the inner wall of the damping sleeve 31 and projects through the recess in the inner tube 1 into the interior of the inner tube 1. In some embodiments, a mounting slot with a lateral opening at one end is provided in the mounting seat 33, and a gap exists between the lateral opening of the mounting seat 33 and the tube wall of the inner tube 1. In some embodiments, part of the elastic element 4 is arranged in the mounting slot, and the other part projects out of the opening of the mounting slot and rests against the inner wall of the inner tube 1.In another embodiment, the arrangement of the elastic element 4 in the mounting slot in the mounting seat 33 provides an installation space for the elastic element 4 and limits its elastic expansion direction, which contributes to improving the stability of the installation structure of the elastic element 4.

[0030] In some embodiments, a mounting hole 11 is provided on the wall of the inner tube 1, and a positioning projection 311 is integrally formed on the inner wall of the damping sleeve 31, projecting outwards and extending into the mounting hole 11. In some embodiments, the damping sleeve 31 can achieve positioning and mounting adjustment with the inner tube 1 by aligning the positioning projection 311 on the inner wall of the damping sleeve 31 with the mounting hole 11 on the inner tube 1.

[0031] In some embodiments, the damping sleeve 31 can comprise a first damping sleeve 31a and a second damping sleeve 31b, which lie on the same circular ring and are arranged independently of one another. In one example, 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 circular ring. In one embodiment, at least two mounting openings 11 can be provided on the inner tube 1, which are opposite each other. In some embodiments, the inner walls of the first damping sleeve 31a and the second damping sleeve 31b comprise positioning projections 311 that project inwards and extend into the corresponding mounting openings 11. In some embodiments, the elastic expansion and compression direction of the elastic element 4 coincides with the connection direction of the two positioning projections 311.In one aspect, this arrangement facilitates the mounting of the first damping sleeve 31a and the second damping sleeve 31b at the ends of the inner tube 1, thereby simplifying the assembly operation of the damping sleeve 31 and the inner tube 1.

[0032] Furthermore, in some embodiments, the mounting base plate 32, the mounting seat 33, and the damping sleeve 31 are formed integrally, and an inwardly curved elastic structure 314 is integrally formed on the first damping sleeve 31a, which bears elastically against the outer wall of the inner tube 1. In some embodiments, one end of the elastic element 4 rests against the inner wall of the inner tube 1, so that the inner tube 1, the second damping sleeve 31b, and the outer tube 2 lie tightly against each other, and the play between the inner tube 1, the second damping sleeve 31b, and the outer tube 2 is eliminated. In some embodiments, the other end of the elastic element 4 rests against the first damping sleeve 31a via the mounting seat 33, so that the first damping sleeve 31a and the outer tube 2 lie tightly against each other, and the play between the first damping sleeve 31a and the outer tube 2 is eliminated.Aspects of the invention overcome the disadvantages of the prior art; if the inner tube 1 bears against the second damping sleeve 31b under the action of the elastic element 4, this would inevitably lead to an increase in the play between the inner tube 1 and the first damping sleeve 31a on the other side; the presence of this play can also cause the telescopic rod to wobble. The present solution provides an inwardly curved elastic structure 314 on the first damping sleeve 31a, which bears elastically against the outer wall of the inner tube 1 and thus perfectly eliminates the play between the inner tube 1 and the first damping sleeve 31a.In one embodiment, this not only reduces the tendency of the entire telescopic rod structure to vibrate due to play, but also maintains a tight fit between the components even with minor manufacturing defects in the inner tube 1, the outer tube 2, the first damping sleeve 31a, and the second damping sleeve 31b. This significantly reduces the dimensional accuracy requirements for the inner tube 1, the outer tube 2, the first damping sleeve 31a, and the second damping sleeve 31b, thus contributing to cost reduction.

[0033] In some embodiments, two positioning ribs 5 are provided on the inner wall of the outer tube 2 on the same ring as the damping sleeve 31, and the two positioning ribs 5 each penetrate the separating gap 313 between the corresponding damping sleeves 31. In some embodiments, the positioning ribs 5 guide the movement of the damping sleeve 31 and facilitate the sliding of the damping sleeve 31 and the inner tube 1 along the positioning ribs 5 on the outer tube 2.

[0034] In some embodiments, the mounting hole 11 on the inner tube 1 is provided at the positioning rib 5 of the inner tube 1, and the positioning projection 311 of the damping sleeve 31 comprises a reinforcing projection 312, which is arranged coaxially with the positioning rib 5 on the inner tube 1, the inner wall surface of the reinforcing projection 312 projecting beyond the inner wall surface of the inner tube 1. In this way, according to some embodiments, the mounting projection on the damping sleeve 31 can be reinforced according to the size of the positioning rib 5, so that the connection strength between the damping sleeve 31 and the inner tube 1 is higher and better withstands the shocks that occur during repeated extension of the telescopic rod 100; this contributes to improving the service life of the telescopic rod 100.

[0035] In some embodiments, the connecting direction of the two separating gaps 313 is perpendicular to the connecting direction of the two positioning projections 311, and the positioning rib 5 on the inner tube 1 and the positioning rib 5 on the outer tube 2 are offset from each other by approximately 90 degrees. With such an arrangement, the overall strength and stability of the telescopic rod 100 in the extended state is higher in some embodiments. Compared to the arrangement of all ribs on the multi-part tube bodies in the same direction in the existing telescopic rod 100, the problem of the inner tube 1 of the telescopic rod 100 being weakly supported in the direction without ribs and thus prone to vibration is avoided.

[0036] In summary, the telescopic rod with elastic damping structure according to embodiments of the invention comprises a damping element 3 between the end of the inner tube 1 and the inner wall of the outer tube 2, wherein an elastic element 4 is provided between the damping element 3 and the inner wall of the inner tube 1. During the sliding of the inner tube 1 and the damping element 3 along the inner wall of the outer tube 2, in some embodiments the elastic force of the elastic element 4 can act on the inner tube 1 and be transmitted to the outer tube 2 via the damping element 3, so that the inner tube 1, the damping element 3, and the outer tube 2 are in close contact with each other; the play between these three parts can be perfectly eliminated, and the vibration of the telescopic rod 100 caused by the play between the inner tube bodies can be overcome.

[0037] Aspects of the invention provide a more durable and stable support for the recording device mounted on the telescopic pole 100. In contrast to the prior art practice of generating frictional damping through the deformation of the plastic damping element 3 itself, here an elastic force is exerted on the damping element 3 by means of the elastic element 4 in order to generate frictional damping with the inner wall of the outer tube 2; this avoids the reduction in resistance caused by material fatigue and external temperature influences. Aspects of the invention promote the long-term stable support of the recording device mounted on the telescopic pole 100.Furthermore, compared to the state of the art, which controls the magnitude of the damping force by means of highly precise control of the local deformation of the damping element 3, the requirements for the dimensional accuracy of the inner diameters of the individual tube bodies as well as the inner and outer diameters of the damping element 3 are significantly reduced; the overall machining and production of the telescopic rod 100 is simpler and more cost-effective, and it can provide stable damping over a long period of time in various harsh environmental conditions, thus ensuring product performance.

[0038] Obviously, the embodiments described above serve only for the sake of clarity and are not intended to limit implementation. Based on the above description, other, different changes or modifications are possible for a person skilled in the art. It is neither necessary nor possible to list all implementations here. Obvious changes or modifications derived from this description remain within the scope of protection of the invention.

Claims

[1] Telescopic pole, comprising: an elastic damping structure with at least two pipe sections, wherein the at least two sections are successively pushed into one another from the inside out; wherein the elastic damping structure is arranged between two adjacent pipe sections; wherein the two adjacent pipe sections comprise an inner pipe and an outer pipe; wherein the elastic damping structure comprises a damping element and an elastic element; wherein the damping element is arranged between an end of the inner tube and an inner wall of the outer tube; wherein the damping element comprises: two damping sleeves, wherein part of the two damping sleeves is arranged between the outer wall of the inner tube and the inner wall of the outer tube, a mounting base plate connected to each of the two damping sleeves and extending to the end face of the inner tube, and a mounting seat projecting into an interior of the inner tube and arranged on the mounting base plate; wherein the elastic element in the mounting seat is arranged entirely within the interior of the inner tube, without occupying any space between the inner and outer tubes; wherein one end of the elastic element is designed to rest against the mounting seat of a first of the two damping sleeves, and the other end is designed to rest against a part of the inner wall of the inner tube or the mounting seat of a second of the two damping sleeves; wherein an elastic force of the elastic element is designed such that it allows the inner tube, the damping element and the outer tube to lie close together and forms frictional damping with the damping element and the inner wall of the outer tube; wherein the inner tube is designed such that it slides over the damping element along an inner wall surface of the outer tube and remains in a relative position after sliding over the damping element. [2] The telescopic rod according to claim 1, wherein the mounting base plate comprises a mounting seat which projects into an interior of the inner tube, wherein one end of the elastic element rests on the mounting seat and the other end rests on the inner wall of the inner tube. [3] The telescopic rod according to claim 2, further comprising a mounting slot with an opening at one end in the mounting seat, wherein a part of the elastic element is arranged in the mounting slot and the other part protrudes from the opening of the mounting slot and rests against the inner wall of the inner tube. [4] The telescopic rod according to claim 2, further comprising a mounting hole arranged on a tube wall of the inner tube, and further comprising a positioning projection arranged on the inner wall of the damping sleeve, wherein the positioning projection extends outwards and into the mounting hole. [5] The telescopic rod according to claim 4, wherein the damping sleeve comprises a first damping sleeve and a second damping sleeve, wherein the first damping sleeve and the second damping sleeve are located on the same circular ring and are arranged independently of each other; wherein the first damping sleeve and the second damping sleeve each have a separating gap extending along the circumferential direction of the circular ring between two ends; wherein two mounting openings are provided on the inner tube and arranged opposite each other; wherein the inner walls of the first damping sleeve and the second damping sleeve each have positioning projections that protrude inwards and extend into the corresponding mounting openings; wherein the mounting base plate is firmly connected to the first damping sleeve; and wherein an elastic stretching and compression direction of the elastic element coincides with the direction of the connecting line of the two positioning projections. [6] The telescopic rod according to claim 5, wherein the first damping sleeve comprises an inwardly curved elastic structure that elastically rests against the outer wall of the inner tube. [7] The telescopic rod according to claim 5, wherein the connection direction of two separating gaps is perpendicular to the connection direction of the two positioning projections. [8] The telescopic rod according to claim 7, further comprising a pair of positioning ribs arranged on the inner wall of the outer tube and lying on the same circle as the damping sleeve, wherein the two positioning ribs penetrate the separating gaps between the damping sleeves at corresponding positions. [9] The telescopic rod according to claim 8, wherein the mounting hole on the inner tube is arranged on the positioning rib of the inner tube. [10] The telescopic rod according to claim 9, further comprising a reinforcing projection arranged on the positioning projection of the damping sleeve and arranged coaxially with the positioning rib on the inner tube; and wherein the inner wall surface of the reinforcing projection projects beyond the inner wall surface of the inner tube. [11] The telescopic rod according to claim 8, wherein the positioning rib on the inner tube and the positioning rib on the outer tube are arranged at an angle of about 90 degrees to each other.

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