Adjusting device and telescopic rod

Abstract

The utility model discloses a kind of adjusting device and telescopic rod, it is related to household goods technical field, the adjusting device is used for telescopic rod, the adjusting device includes: adjusting piece, base and buffer piece, at least a part of the buffer piece is located between the adjusting piece and the base, for reducing the friction when the adjusting piece and the base relative rotation.The adjusting device according to the utility model embodiment, by setting bearing between adjusting piece and base, the friction when adjusting piece and base rotate can be reduced, beneficial to increase the pressure between base and wall surface, so as to increase the load bearing capacity after telescopic rod installation in the case where torque is certain.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese patent application No. 202521919311.8, filed with the State Intellectual Property Office of China on September 5, 2025, entitled “Telescopic Rod”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to the field of household goods technology, and in particular to an adjustment device and a telescopic rod. Background Technology

[0004] No-drill telescopic poles are typically supported between two walls for hanging objects. The structure includes an inner pole, an outer pole, and bases at both ends of the inner and outer poles. An adjustment tube is installed between the inner pole and the bases. The function of the adjustment tube is to further adjust the overall length of the telescopic pole (fine-tuning) by adjusting the extension of the adjustment tube relative to the inner pole after the overall length of the inner pole and the pole itself is relatively fixed, thus ensuring the telescopic pole is firmly anchored between the two walls.

[0005] In related technologies, when turning the adjusting tube, a portion of the operating torque is converted into relative displacement between the adjusting tube and the screw head. Given a fixed operating torque, a greater frictional force between the adjusting tube and the base will cause a portion of the work to be converted into frictional work. According to the friction formula... When the friction coefficient μ remains constant, an increase in friction will lead to a decrease in normal force, resulting in a smaller load-bearing capacity under a constant operating torque. Utility Model Content

[0006] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this utility model is to provide an adjustment device with a buffer element, which can reduce the frictional force between the adjustment element and the base during rotation, thereby increasing the pressure between the base and the wall, and thus increasing the load-bearing capacity of the telescopic rod after installation under a constant torque.

[0007] Another objective of this invention is to provide a telescopic rod, including the aforementioned adjustment device.

[0008] According to an embodiment of the present invention, an adjustment device is used for a telescopic rod. The adjustment device includes an adjustment member, a base, and a buffer member. At least a portion of the buffer member is disposed between the adjustment member and the base to reduce the frictional force when the adjustment member and the base rotate relative to each other.

[0009] According to the adjustment device of this utility model embodiment, by setting a buffer between the adjustment member and the base, the frictional force when the adjustment member and the base rotate can be reduced, which is conducive to increasing the pressure between the base and the wall, thereby increasing the load-bearing capacity of the telescopic rod after installation under a certain torque.

[0010] In addition, the adjusting device according to the above embodiments of the present invention may also have the following additional technical features:

[0011] In some examples of this utility model, the buffer includes a rolling unit disposed between the adjusting member and the base.

[0012] In some examples of this utility model, the rolling unit includes balls that are rotatably disposed between the adjusting member and the base along a direction about the rotational central axis of the base.

[0013] In some examples of this utility model, the adjusting member is provided with a first receiving groove, and a portion of the ball is rotatably disposed in the first receiving groove.

[0014] In some examples of this utility model, the base (30) is provided with a second receiving groove, and a portion of the ball is rotatably disposed in the second receiving groove.

[0015] In some examples of this utility model, the buffer includes a rolling bearing disposed between the adjusting member and the base.

[0016] In some examples of this invention, the rolling bearing is configured to be disposed between the adjusting member and the base along the axial direction of the telescopic rod.

[0017] In some examples of this utility model, the rolling bearing is an integral shell bearing, the end of the adjusting member is provided with a third mating groove, one end of the integral shell bearing is provided in the third mating groove and is interference-fitted, and the other end abuts against the base.

[0018] In some examples of this utility model, the rolling bearing includes a first housing, a second housing, and a ball bearing unit. The first housing covers the outer side of the second housing along the circumference of the bearing. The ball bearing unit is rotatably disposed between the first housing and the second housing. The end of the adjusting member is provided with a fourth mating groove. One end of the first housing is disposed in the fourth mating groove, and the other end abuts against the base.

[0019] In some examples of this utility model, the buffer includes a sliding unit, at least a portion of which is disposed between the adjusting member and the base.

[0020] In some examples of this invention, the sliding unit includes a sliding bearing.

[0021] In some examples of this utility model, the sliding unit includes at least one ball, the adjusting member is provided with a first groove, the base is provided with a second groove opposite to the first groove, and at least a portion of the ball is provided in the first groove and the second groove.

[0022] In some examples of this utility model, the sliding unit is a pad, the adjusting member is provided with a third groove, the base is provided with a fourth groove opposite to the third groove, and at least a portion of the pad is provided in the third groove and the fourth groove.

[0023] This utility model also proposes a telescopic rod. According to an embodiment of this utility model, the telescopic rod includes: a rod body and the aforementioned adjusting device, wherein the adjusting member is connected to the end of the rod body, and the adjusting member is configured to adjust the relative position of the base and the rod body along the axial direction of the rod body.

[0024] The beneficial effects of this utility model compared to related technologies are: by setting a buffer between the adjusting component and the base, the frictional force between the adjusting component and the base during rotation can be reduced, which helps to increase the pressure between the base and the wall, thereby increasing the load-bearing capacity of the telescopic rod after installation under a certain torque.

[0025] This utility model also proposes a telescopic rod. According to an embodiment of this utility model, the telescopic rod includes: a rod body, an adjusting member, a base, and a bearing. The adjusting member is connected to the end of the rod body; the base is rotatably connected to the adjusting member, and the adjusting member is configured to adjust the relative position of the base and the rod body along the axial direction of the rod body; the bearing is disposed between the adjusting member and the base.

[0026] According to the embodiments of the present invention, by setting a bearing between the adjusting member and the base, the frictional force when the adjusting member and the base rotate can be reduced, which helps to increase the pressure between the base and the wall, thereby increasing the load-bearing capacity of the telescopic rod after installation under a certain torque.

[0027] In some examples of this invention, the bearing is configured to be disposed along the axial direction between the adjusting member and the base.

[0028] In some examples of this utility model, the base includes a positioning buckle, the adjusting member is provided with a positioning hole, the positioning buckle is rotatably inserted through the positioning hole, and the positioning buckle is snap-connected to the adjusting member, and the rolling bearing is positioned between the positioning buckle and the adjusting member.

[0029] In some examples of this utility model, the adjusting member is provided with a first mating groove, the positioning buckle is provided with a second mating groove, the first mating groove and the second mating groove are opposite to each other along the axial direction, and the two ends of the bearing along the axial direction are respectively positioned in the first mating groove and the second mating groove.

[0030] In some examples of this utility model, the positioning buckle includes an abutment part and a positioning part. The positioning part passes through the bearing and is snapped together with the adjusting member. One end face of the abutment part is connected to the positioning part and abuts against the bearing. The other end face of the abutment part abuts against the base.

[0031] In some examples of this utility model, the bearing includes a first cover, a second cover, and a needle roller unit. The first cover and the second cover are connected along the axial direction. The needle roller unit is rotatably disposed between the first cover and the second cover. The first cover is disposed in the first mating groove, the second cover is disposed in the second mating groove, and at least a portion of the needle roller unit is located in the first mating groove.

[0032] In some examples of this utility model, the rolling bearing is a thrust plane needle roller bearing.

[0033] In some examples of this utility model, the adjusting member includes a connecting part and an adjusting part. The connecting part is connected to the telescopic rod, and the adjusting part is connected to the base. The adjusting part is threadedly engaged with the connecting part. The adjusting part is configured to convert the circumferential rotational motion of the telescopic rod into the axial telescopic motion of the telescopic rod.

[0034] In some examples of this utility model, the adjusting part includes a main body and a protrusion, and the bearing passes through the protrusion and abuts between the main body and the base.

[0035] In some examples of this utility model, the bearing includes an inner ring, an outer ring, and a ball bearing unit. The inner ring is sleeved on the outer circumferential surface of the adjusting member, the outer ring is disposed in the base, and the ball bearing unit is rotatably disposed between the inner ring and the outer ring. The bearing extends obliquely along the axial direction.

[0036] In some examples of this utility model, the adjusting device further includes a baffle plate disposed on the base and blocking the outer ring along the axial direction.

[0037] In some examples of this utility model, the bearing is a ball roller bearing.

[0038] The beneficial effects of this utility model compared to related technologies are: by setting a bearing between the adjusting component and the base, the frictional force when the adjusting component and the base rotate can be reduced, which helps to increase the pressure between the base and the wall, thereby increasing the load-bearing capacity of the telescopic rod after installation under a certain torque. Attached Figure Description

[0039] Figure 1 This is a partial structural schematic diagram of the telescopic rod in some embodiments of this utility model;

[0040] Figure 2 This is a partial structural assembly drawing of the telescopic rod in some embodiments of this utility model;

[0041] Figure 3 This is a partial cross-sectional view of the telescopic rod in some embodiments of this utility model;

[0042] Figure 4 This is a schematic diagram of the positioning buckle in some embodiments of this utility model;

[0043] Figure 5 This is a partial cross-sectional view of the telescopic rod in some embodiments of this utility model (showing the state where the distance between the rod and the base is reduced);

[0044] Figure 6 This is a partial cross-sectional view of the telescopic rod in some embodiments of this utility model (showing the state where the distance between the rod and the base increases);

[0045] Figure 7 This is a partial cross-sectional view of the telescopic rod in some other embodiments of this utility model;

[0046] Figure 8 This is a partial structural assembly drawing of the telescopic rod in some embodiments of the present invention (showing the adjusting component, bearing and positioning buckle);

[0047] Figure 9 This is a schematic diagram of the telescopic rod in some embodiments of this utility model;

[0048] Figure 10 This is a partial cross-sectional view of the telescopic rod in other embodiments of the utility model (showing the ball bearings);

[0049] Figure 11 yes Figure 10 A partial cross-sectional view of the area where the ball bearings are located;

[0050] Figure 12 This is a partial structural cross-sectional view of the telescopic rod in other embodiments of the utility model (showing another type of rolling bearing);

[0051] Figure 13 yes Figure 12A partial cross-sectional view of the area where the rolling bearing is located;

[0052] Figure 14 This is a partial structural cross-sectional view of the telescopic rod in some other embodiments of the utility model (showing a sphere);

[0053] Figure 15 yes Figure 14 A partial cross-sectional view of the region containing the central sphere;

[0054] Figure 16 This is a partial structural cross-sectional view of the telescopic rod in some other embodiments of the utility model (showing the gasket);

[0055] Figure 17 yes Figure 16 A partial cross-sectional view of the area where the gasket is located.

[0056] Figure label:

[0057] 100. Telescopic rod; 10. Rod body; 11. Inner rod; 12. Outer rod; 20. Adjusting component; 210. End face; 201. Positioning hole; 202. First mating groove; 203. First receiving groove; 204. Fourth mating groove; 205. First recess; 206. Third recess; 21. Connecting part; 22. Adjusting part; 221. Main body; 222. Protrusion; 30. Base; 310. Abutment surface; 31. Positioning buckle; 301. Second mating groove; 302. Second receiving groove; 303, second recess; 304, fourth recess; 311, abutting part; 312, positioning part; 3121, guide surface; 3122, abutting surface; 32, baffle; 33, anti-slip pad; 40a, ball; 40b, sphere; 40c, gasket; 40, rolling bearing; 41, first cover; 42, second cover; 43, needle roller unit; 44, inner ring; 45, outer ring; 46, ball unit; 47, first housing; 48, second housing. Detailed Implementation

[0058] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0059] Combination Figures 1 to 17 According to the present utility model embodiment, the adjustment device is used for the telescopic rod 100. The adjustment device includes: an adjustment member 20, a base 30 and a buffer member. At least a portion of the buffer member is disposed between the adjustment member 20 and the base 30 to reduce the frictional force when the adjustment member 20 and the base 30 rotate relative to each other.

[0060] Specifically, the telescopic rod 100 can be supported between two walls. After installation, the rod body 10 of the telescopic rod 100 can be used to hang objects. In use, the telescopic rod 100 can be adjusted to a predetermined length, and then the base 30 is aligned with the wall. To improve the fixing effect, the telescopic rod 100 is also equipped with an adjustment device for adjusting the distance between the rod body 10 and the base 30. The adjustment device can improve the tightness of the fit between the telescopic rod 100 and the wall. Specifically, one end of the adjusting member 20 can be connected to the end of the rod body 10 of the telescopic rod 100, so that the adjusting member 20 can be close to the base 30, thereby allowing the other end of the adjusting member 20 to be connected to the base 30. The base 30 can then contact the wall, improving the stability of the telescopic rod 100 after installation.

[0061] When adjusting the adjustment device, the adjusting component 20 and the base 30 will rotate relative to each other. In order to reduce the friction between the adjusting component 20 and the base 30 during rotation, a buffer component is provided between the base 30 and the adjusting component 20. The buffer component can reduce the friction between the adjusting component 20 and the base 30 during relative rotation. As a result, the pressure between the base 30 and the wall can be increased. Thus, under the condition of constant torque (i.e., when the user adjusts the adjustment device with the same force), the load-bearing capacity of the telescopic rod 100 after installation can be increased.

[0062] In some embodiments of this utility model, during assembly, the relative position of the base 30 and the rod 10 can be adjusted along the axial direction of the telescopic rod 100 by rotating the adjusting member 20, for example, by extending it axially, so that the base 30 can contact the wall surface, or improve the tightness of the contact between the base 30 and the wall surface, thereby improving the reliability of the telescopic rod 100 after installation and increasing the load-bearing capacity of the telescopic rod 100. Similarly, when it is necessary to disassemble the telescopic rod 100, the adjusting member 20 can be turned in the opposite direction to shorten the length of the telescopic rod 100, thereby achieving drilling-free assembly of the telescopic rod 100.

[0063] More specifically, after the bases 30 at both ends of the telescopic rod 100 contact the wall, the telescopic rod 100 needs to be fixed between the two walls by the friction between the bases 30 and the wall. The load-bearing capacity of the telescopic rod 100 is also related to this friction. That is, the load-bearing capacity of the telescopic rod 100 is positively correlated with the friction between the bases 30 and the wall. Let this friction be μ1 and the friction between the bases 30 and the wall be f1. According to the friction formula f=μ×F, when the friction coefficient μ1 remains unchanged, further enhancing the load-bearing capacity of the telescopic rod 100 depends on the normal pressure after the adjusting component 20 is finally tightened.

[0064] In related technologies, when a user tightens the adjusting tube, part of the operating torque is converted into relative displacement between the adjusting tube and the base. As the user rotates the adjusting component in the tightening direction, the normal pressure of the adjusting tube on the base gradually increases with the work done by the operating torque. At the same time, friction is generated at the connection between the adjusting tube and the base due to rotation. Let the coefficient of friction between the adjusting tube and the base be μ2, and the friction force between the adjusting tube and the base be f2. According to the friction force formula, the friction force f2 between the adjusting tube and the base will gradually increase with tightening. When the user's operating torque is constant, the larger f2 is, the more work will be converted into work done by the friction force f2, resulting in a decrease in normal pressure and thus insufficient load-bearing capacity. Therefore, when the user needs the telescopic rod to achieve the predetermined load-bearing capacity after installation, it is necessary to increase the operating torque applied to the adjusting component, requiring more effort and causing inconvenience to the user during installation.

[0065] Therefore, in order to maintain the load-bearing capacity of the telescopic rod while keeping the operating torque constant, the adjustment device of this utility model also includes a buffer. The buffer is disposed between the adjustment member 20 and the base 30. The buffer can be used to reduce the frictional force f2 generated when the adjustment member 20 and the base 30 rotate relative to each other.

[0066] Specifically, let the torque of the adjusting component 20 be T, the effective work done when the adjusting component 20 is displaced be W1, and the harmful work done when the adjusting component 20 is displaced be W2, then T = W1 + W2. The normal force of the adjusting component 20 on the base 30 is F, and the displacement of the adjusting component 20 is P. Therefore, W1 = F × P. The bearing can reduce the frictional force f2 between the adjusting component 20 and the base 30. When T remains constant, decreasing f2 leads to a decrease in W2, an increase in f1, an increase in F, and an increase in W1. Therefore, under the same torque, decreasing f2 can increase the load-bearing capacity of the telescopic rod 100 after assembly.

[0067] According to the telescopic rod 100 of this utility model embodiment, by setting a buffer between the adjusting member 20 and the base 30, the frictional force when the adjusting member 20 and the base 30 rotate can be reduced, which is conducive to increasing the pressure between the base 30 and the wall, thereby increasing the load-bearing capacity of the telescopic rod 100 after installation under a certain torque.

[0068] In some embodiments of this utility model, the buffer includes a rolling unit disposed between the adjusting member 20 and the base 30. That is, the buffer used to reduce the rotational friction between the adjusting member 20 and the base 30 can be a rolling unit. When the adjusting member 20 and the base 30 rotate relative to each other, the rolling unit can roll between the adjusting member 20 and the base 30 to convert the surface-to-surface sliding friction when the adjusting member 20 and the base 30 rotate into rolling friction between the adjusting member 20 and the base 30 and the rolling unit, thereby reducing friction and increasing the load-bearing capacity of the telescopic rod 100.

[0069] Specifically, in combination Figure 10 and Figure 11 The rolling unit includes a ball 40a, which is rotatably disposed between the adjusting member 20 and the base 30 along the direction of the rotation center axis around the base 30. In this way, when the base 30 and the adjusting member 20 rotate relative to each other, the ball 40a can roll along the rotation center axis of the base 30, thereby converting the surface-to-surface friction between the adjusting member 20 and the base 30 into rolling friction between the adjusting member 20 and the ball 40a and between the base 30 and the ball 40a, thereby reducing the frictional force when the adjusting member 20 and the base 30 rotate relative to each other.

[0070] More specifically, the adjusting member 20 is provided with a first receiving groove 203, and a portion of the ball 40a is rotatably disposed in the first receiving groove 203. The base 30 is provided with a second receiving groove 302, and a portion of the ball 40a is rotatably disposed in the second receiving groove 302. In this way, the side of the ball 40a that mates with the adjusting member 20 can be received in the first receiving groove 203, and the side of the ball 40a that mates with the base 30 can be received in the second receiving groove 302. This not only improves the tightness of the fit between the ball 40a and the adjusting member 20 and the base 30, but also facilitates the assembly of the ball 40a and improves the structural stability.

[0071] Combination Figure 11 Multiple balls 40a can be arranged at intervals along the circumference of the adjusting member 20. Multiple first receiving grooves 203 and second receiving grooves 302 that cooperate with the balls 40a are also provided. This can improve the rolling fit effect, facilitate the distribution of force and the sharing of load, thereby maintaining the stability of operation.

[0072] In some embodiments of this utility model, the buffer includes a rolling bearing 40, which is disposed between the adjusting member 20 and the base 30. It can generate rolling friction when the adjusting member 20 and the base 30 rotate relative to each other. The rolling bearing 40 can reduce the frictional force f2 generated when the adjusting member 20 and the base 30 rotate relative to each other.

[0073] Furthermore, combined Figure 5Since the adjusting member 20 can adjust the relative position between the rod 10 and the base 30 along the axial direction, the adjusting member 20 and the base 30 are connected axially. In some embodiments of this utility model, the rolling bearing 40 is configured to be located between the adjusting member 20 and the base 30 along the axial direction of the telescopic rod 100. This allows the rolling bearing 40 to reduce the friction between the end faces of the adjusting member 20 and the base 30, or in other words, the rolling bearing 40 can convert the surface-to-surface friction between the axial end faces of the adjusting member 20 and the base 30 into rolling friction, thereby reducing the friction and thus reducing the harmful work caused by excessive friction. In addition, the rolling bearing 40 can also be used to bear axial loads, which helps to increase the axial support force between the adjusting member 20 and the base 30.

[0074] Combination Figure 2 and Figure 3 In some embodiments of this utility model, the base 30 includes a positioning buckle 31, and the adjusting member 20 is provided with a positioning hole 201. The positioning buckle 31 is rotatably inserted through the positioning hole 201 and is snap-fitted to the adjusting member 20. The rolling bearing 40 is positioned between the positioning buckle 31 and the adjusting member 20. Specifically, the rolling bearing 40 is disposed between the base 30 or the positioning buckle 31 and the adjusting member 20, and surrounds the positioning buckle 31. The positioning buckle 31 can position the rolling bearing 40 between the base 30 and the adjusting member 20, which helps to improve the structural stability after assembly. The rolling bearing 40 surrounds the positioning buckle 31, and the positioning buckle 31 can also provide support for the rolling bearing 40.

[0075] Furthermore, combining Figure 3 and Figure 4 In some embodiments of this utility model, the end face 210 of the adjusting member 20 is provided with a first mating groove 202, the positioning buckle 31 is provided with a second mating groove 301, the first mating groove 202 and the second mating groove 301 are opposite each other along the axial direction, and the two ends of the rolling bearing 40 along the axial direction are respectively positioned in the first mating groove 202 and the second mating groove 301.

[0076] Specifically, one side of the rolling bearing 40 along the axial direction is positioned in the first mating groove 202. For example, a portion of the rolling bearing 40 may extend into the first mating groove 202. This improves the tightness of the fit between the rolling bearing 40 and the adjusting member 20 and provides support for the rotation of the adjusting member 20. The other side of the rolling bearing 40 is positioned in the second mating groove 301. For example, a portion of the rolling bearing 40 may extend into the second mating groove 301. This improves the tightness of the fit between the rolling bearing 40 and the positioning buckle 31 and provides support for the relative rotation between the adjusting member 20 and the base 30. The first mating groove 202 and the second mating groove 301 can circumferentially limit the rolling bearing 40, improving the stability of the rolling bearing 40 during rotation. In addition, the first mating groove 202 and the second mating groove 301 can also support the opposite sides of the rolling bearing 40 along the axial direction, improving the structural stability of the rolling bearing 40 after installation.

[0077] More specifically, combined Figure 4 In some embodiments of this utility model, the positioning buckle 31 includes an abutment portion 311 and a positioning portion 312. A second mating groove 301 is provided in the abutment portion 311. The positioning portion 312 passes through the rolling bearing 40 and is snapped together with the adjusting member 20. Thus, the positioning buckle 31 can connect the rolling bearing 40 to the adjusting member 20 axially through the positioning portion 312, which facilitates the positioning and assembly of the rolling bearing 40. The positioning portion 312 extends axially, allowing the rolling bearing 40 to be axially installed between the adjusting member 20 and the base 30. During assembly, the rolling bearing 40 can be first installed in the positioning portion 312, and then the positioning portion 312 can be snapped together with the adjusting member 20 through the positioning hole 201. Thus, the positioning portion 312 can serve as a guide during assembly and as a support and fixation function after assembly. In conjunction with the foregoing, the base 30 is provided with an abutment surface 310 that is axially opposite to the end face 210 of the adjusting member 20. One end of the positioning buckle 31 or the abutment part 311 abuts against the abutment surface 310. The positioning part 312 passes through the first mating groove 202 to position the rolling bearing 40 between the positioning buckle 31 or the abutment part 311 and the end face 210 of the adjusting member 20.

[0078] In addition, the rolling bearing 40 can be installed by the positioning buckle 31. The positioning part 312 can pass through the rotation center axis of the rolling bearing 40, so that the rolling bearing 40 can be installed axially on the adjusting member 20, but does not need to be sleeved on the outside of the adjusting member 20, which helps to improve the compactness of the structure.

[0079] One end face of the abutment portion 311 connects to the positioning portion 312 and abuts against the rolling bearing 40, which increases the contact area between the rolling bearing 40 and the positioning buckle 31. The other end face of the abutment portion 311 abuts against the base 30, which increases the contact area between the base 30 and the positioning buckle 31. This improves the tightness of the fit between the rolling bearing 40 and the adjusting member 20 and the base 30, transforming the axial surface-to-surface contact between the adjusting member 20 and the base 30 into surface-to-surface contact between the adjusting member 20 and the rolling bearing 40, and between the base 30 and the rolling bearing 40. This converts the axial surface-to-surface frictional force f1 between the adjusting member 20 and the base 30 into rolling friction f2 between the adjusting member 20 and the rolling bearing 40, and between the base 30 and the rolling bearing 40. Since f2 is less than f1, the frictional resistance during relative rotation between the adjusting member 20 and the base 30 is reduced.

[0080] More specifically, combined Figure 4 In some embodiments of this utility model, the end of the positioning part 312 opposite to the abutment part 311 is provided with a buckle. The buckle has a guide surface 3121 and an abutment surface 3122. The guide surface 3121 extends outward along the axial direction of the adjusting member 20, so that the buckle can easily pass through the rolling bearing 40 and the positioning hole 201. The abutment surface 3122 extends radially along the adjusting member 20 and abuts against the bottom wall of the first mating groove 202 along the axial direction, so that the buckle can abut against the bottom wall of the first mating groove 202 along the axial direction, preventing the positioning part 312 from coming out and improving the stability after assembly.

[0081] For example, combined Figure 4 The undercut is wedge-shaped, and the outer side of the undercut forms a guide slope. The positioning part 312 is provided with multiple undercuts at intervals, and there is a notch between the multiple undercuts. The notch provides space for the undercut to move radially, so that the undercut can have a certain deformation ability to pass through the positioning hole 201 during installation, and can retract to disengage from the positioning hole 201 during disassembly.

[0082] According to the adjustment device of this embodiment, the positioning buckle 31 has an acute-angled guide slope and an undercut larger than the inner hole of the rolling bearing 40 in the circumferential direction. The undercut of the positioning buckle 31 passes through the rolling bearing 40 and is limited by the inner hole edge of the adjusting member 20 or the adjusting part 22. The other side of the positioning buckle 31 contacts the inner surface of the base 30.

[0083] Combination Figure 8In some embodiments of this utility model, the rolling bearing 40 includes a first cover 41, a second cover 42, and a needle roller unit 43. The first cover 41 and the second cover 42 are axially connected, and the needle roller unit 43 is rotatably disposed between the first cover 41 and the second cover 42. A space for placing the needle roller unit 43 can be constructed between the first cover 41 and the second cover 42. The needle roller unit 43 rolls within the first cover 41 and the second cover 42, generating rolling friction between the adjusting member 20 and the base 30, which helps to improve the smoothness of rotation and reduce the frictional force during rotation. Further, the needle roller unit 43 may include a cage and a plurality of needle rollers arranged circumferentially at intervals. The needle rollers extend radially, which helps to improve the axial support force of the rolling bearing 40.

[0084] The first cover 41 can extend into the first mating groove 202, and at least a part of the needle roller unit 43 is located in the first mating groove 202 to realize the mating between the rolling bearing 40 and the adjusting member 20. The second cover 42 can extend into the second mating groove 301 to realize the mating between the rolling bearing 40 and the base 30. The needle roller unit 43 rotates between the first cover 41 and the second cover 42, so that the friction force when the adjusting member 20 and the base 30 rotate relative to each other changes from surface-to-surface friction or sliding friction to rolling friction.

[0085] Optionally, the rolling bearing 40 is a thrust plane needle roller bearing 40, which is a type of rolling bearing 40 that can withstand axial loads and has the characteristics of compact structure, high rigidity and high load-bearing capacity, which is beneficial to improving structural stability.

[0086] Alternatively, the rolling bearing 40 may also be a thrust bearing, a radial bearing, or a radial-thrust bearing. That is, the rolling bearing 40 may be in the form of providing axial load or radial load, or being able to provide both axial and radial load simultaneously.

[0087] Combination Figure 5 In some embodiments of this utility model, the adjusting member 20 includes a connecting part 21 and an adjusting part 22. The connecting part 21 is connected to the rod body 10, and the adjusting part 22 is connected to the base 30. The adjusting part 22 is threadedly engaged with the connecting part 21. The adjusting part 22 is configured to convert the circumferential rotational motion of the rod body 10 into the axial telescopic motion of the rod body 10, so as to achieve fine adjustment of the axial length of the telescopic rod 100 by rotating the adjusting part 22. Specifically, when the user needs to lock the telescopic rod 100 to the wall, see [reference needed]. Figure 6 The adjusting part 22 can be rotated to move axially away from the connecting part 21 or the rod 10, supporting the base 30 axially, improving the tightness of the contact between the base 30 and the wall, and increasing the pressure of the base 30 on the wall. When the user needs to disassemble the telescopic rod 100, see [link to relevant documentation]. Figure 5The adjustment part 22 can be rotated in the opposite direction to move the adjustment part 22 axially toward the connecting part 21 or the rod 10, thereby gradually reducing the pressure of the base 30 on the wall.

[0088] For example, when installing the telescopic rod 100, the adjusting part 22 can be rotated clockwise, and when disassembling the telescopic rod 100, the adjusting part 22 can be rotated counterclockwise; or when installing the telescopic rod 100, the adjusting part 22 can be rotated counterclockwise, and when disassembling the telescopic rod 100, the adjusting part 22 can be rotated clockwise.

[0089] Specifically, in combination Figure 5 The first end of the adjusting part 22 is sleeved on the outside of the rod body 10, and the second end extends into the base 30. The adjusting part 22 is provided with internal thread. A part of the connecting part 21 is provided on the rod body 10 and fixedly connected to the rod body 10, and the other part is provided in the adjusting part 22. The connecting part 21 is provided with external thread. The internal thread and the external thread achieve threaded engagement. The rolling bearing 40 is provided between the second end of the adjusting part 22 and the base 30.

[0090] Preferably, the thread helix angle is 15 degrees, which can prevent the screw from retracting when the adjusting part 22 rotates.

[0091] Optionally, the rod body 10 can be a hollow rod, with a portion of the connecting part 21 extending axially into the rod body 10 and fixedly connected to it. Alternatively, the connecting part 21 can be directly constructed at the end of the rod body 10, and the outer periphery of the connecting part 21 is provided with external threads.

[0092] Optionally, the outer periphery of the adjustment part 22 is provided with stripes, which can increase the friction and make it less likely to slip when the user rotates the adjustment part 22, making it easier to apply rotational force to the adjustment part 22.

[0093] Combination Figure 5 In some embodiments of this utility model, the axial projection of the base 30 is larger than that of the rod 10. That is, the radial dimension of the base 30 can be larger than that of the rod 10. A larger base 30 increases the contact area between the base 30 and the wall, thereby increasing the friction when the base 30 contacts the wall. The base 30 may include an abutment seat and a connecting seat. The connecting seat extends axially and wraps around the outer periphery of the adjusting part 22. The outer periphery of the adjusting part 22 may have a stepped structure. After assembly, the connecting seat of the base 30 can abut against the stepped structure of the adjusting part 22 axially to improve the tightness and stability of the fit.

[0094] Combination Figure 5In some embodiments of this utility model, the adjusting part 22 includes a main body 221 and a protrusion 222. The outer diameter of the main body 221 is larger than the outer diameter of the protrusion 222, forming a stepped structure at the connection between the main body 221 and the protrusion 222. Specifically, the main body 221 can be connected to the rod 10, and the protrusion 222 can be connected to the base 30. The protrusion 222 can improve the stability of the engagement between the adjusting part 22 and the base 30. The base 30 can axially support the main body 221, which helps reduce the frictional force generated when the adjusting part 22 and the base 30 rotate, and also helps improve structural stability.

[0095] In some embodiments of this utility model, the base 30 is provided with a first recess, and the protrusion 222 extends into the first recess, which can improve the tightness of the fit between the adjustment part 22 and the base 30. The first recess can restrict the adjustment part 22 radially and improve the stability of the adjustment part 22 moving axially.

[0096] Combination Figure 7 In some other embodiments of this utility model, the rolling bearing 40 passes through the protrusion 222 and abuts between the main body 221 and the base 30. The rolling bearing 40 can be radially supported on the adjustment part 22, which is convenient for assembly and improves structural stability.

[0097] The rolling bearing 40 is fitted with the adjusting part 22 and the base 30 in both the radial and axial directions, which can provide axial and radial loads at the same time, thus improving structural stability.

[0098] Specifically, in combination Figure 7 In some other embodiments of this utility model, the rolling bearing 40 includes an inner ring 44, an outer ring 45, and a ball bearing unit 46. The inner ring 44 is sleeved on the outside of the adjusting member 20 or the adjusting part 22, and the outer ring 45 is disposed inside the base 30, so that the rolling bearing 40 can be disposed between the adjusting member 20 and the base 30. The ball bearing unit 46 is rotatably disposed between the inner ring 44 and the outer ring 45. The rolling bearing 40 extends obliquely along the axial direction. A space for placing the ball bearing unit 46 can be constructed between the inner ring 44 and the outer ring 45. The ball bearing unit 46 rolls between the inner ring 44 and the outer ring 45, which can form rolling friction between the adjusting member 20 and the base 30, which helps to improve the smoothness of rotation and reduce the friction force during rotation.

[0099] Furthermore, the ball unit 46 may include a cage and a plurality of balls spaced apart circumferentially. The balls extend obliquely in the axial direction, enabling them to withstand both radial and unidirectional axial loads simultaneously. Specifically, the ball unit 46 may extend obliquely relative to the axis of the adjusting member 20.

[0100] In some embodiments of this utility model, the adjusting device further includes a baffle 32, which is disposed on the base 30 and stops the outer ring 45 along the axial direction, which helps to improve the structural stability of the rolling bearing 40 after assembly.

[0101] In some other embodiments of this utility model, the base 30 is provided with a second recess, which is axially connected to the first recess. The rolling bearing 40 passes through the protrusion 222 and is embedded in the second recess, abutting against the main body 221. An outer ring 45 is provided on the inner wall of the second recess, and a baffle 32 is provided on the base 30, extending radially into the second recess, and the baffle 32 axially stops the outer ring 45.

[0102] In other words, when the rolling bearing 40 is sleeved outside the adjusting part 22, the larger size of the base 30 can increase the support force between the base 30 and the wall. Therefore, the space inside the base 30 can be used to install the rolling bearing 40, and the cooperation between the rolling bearing 40, the adjusting part 20 and the base 30 can be realized inside the base 30, which is conducive to improving the structural compactness and will not increase the size of the rod 10.

[0103] In some embodiments of this utility model, the rolling bearing 40 can be a ball roller bearing, which can simultaneously bear radial load and unidirectional axial load.

[0104] In some embodiments of this utility model, the rolling bearing 40 can be a tapered roller bearing, which can simultaneously bear radial loads and unidirectional axial loads.

[0105] Combination Figure 6 and Figure 7 In some embodiments of this utility model, the base 30 also includes an anti-slip pad 33, which is disposed on the side end face of the base 30 away from the rod 10. The anti-slip pad 33 can contact the wall surface, thereby improving the stability and reliability of the base 30 when it comes into contact with the wall surface.

[0106] Alternatively, the anti-slip mat 33 can be made of a material that increases friction. For example, an anti-slip silicone anti-slip mat 33. The side of the anti-slip mat 33 facing the wall may have an anti-slip pattern to increase the friction between the anti-slip mat 33 and the wall.

[0107] In some embodiments of this utility model, the rolling bearing 40 can be an integrally encased bearing. The end of the adjusting member 20 is provided with a third mating groove. One end of the integrally encased bearing is embedded in the third mating groove and interference-fitted, while the other end abuts against the base 30. Since the encased bearing is an integral structure, it can be directly installed on the end of the adjusting member 20 without the need for positioning buckles for positioning and fixing the bearing, which simplifies the structure and facilitates assembly.

[0108] Alternatively, the base 30 may have a third mating groove at its end, with one end of the integrated housing bearing embedded in the third mating groove and interference fit, and the other end abutting against the adjusting member 20.

[0109] Combination Figure 12 and Figure 13In some embodiments of this utility model, the rolling bearing 40 can be a thrust ball bearing with a dustproof housing. Specifically, the rolling bearing 40 includes a first housing 47, a second housing 48, and a ball bearing unit 40a. The first housing 47 covers the outside of the second housing 48 along the circumference of the bearing. The ball bearing unit 40a is rotatably disposed between the first housing 47 and the second housing 48. The end of the adjusting member 20 is provided with a fourth mating groove 204. One end of the first housing 47 is disposed in the fourth mating groove 204, and the other end abuts against the base 30. Thus, the first housing 47 and the second housing 48 can jointly cover the ball bearing unit 40a, preventing external dust from entering the bearing. Furthermore, the rolling bearing 40 can be installed in the fourth mating groove 204, facilitating assembly and simplifying the structure of the adjusting device.

[0110] Specifically, the first housing 47 is L-shaped and includes a first plate and a second plate; the second housing 48 is U-shaped and includes a third plate, a fourth plate and a fifth plate, wherein the third plate and the fifth plate are connected to opposite sides of the fourth plate, the length of the third plate is greater than that of the fifth plate and is located inside the rolling bearing 40, the first plate is stacked on the outside of the fifth plate, and the ball bearing 40a unit is located between the second plate, the third plate, the fourth plate and the fifth plate.

[0111] Combination Figures 14 to 17 In some embodiments of this invention, the buffer includes a sliding unit, at least a portion of which is disposed between the adjusting member 20 and the base 30. The sliding unit provides support between the adjusting member 20 and the base 30 and generates sliding friction. Specifically, the sliding unit prevents direct surface-to-surface friction between the adjusting member 20 and the base 30. The sliding unit can be made of a material with lower friction, thereby reducing friction when the adjusting member 20 and the base 30 rotate relative to each other. The sliding unit replaces the highly destructive form of friction, direct scraping of solid surfaces, between the adjusting member 20 and the base 30.

[0112] In some embodiments of this utility model, the sliding unit includes a sliding bearing, which can generate sliding friction when the adjusting member 20 and the base 30 rotate relative to each other, thereby reducing the frictional force generated when the adjusting member 20 and the base 30 rotate relative to each other.

[0113] Specifically, in combination Figure 14 and Figure 15In some embodiments of this utility model, the sliding unit includes at least one sphere 40b, the adjusting member is provided with a first groove 205, and the base is provided with a second groove 303 opposite to the first groove 205. At least a portion of the sphere 40b is disposed in the first groove 205 and the second groove 303. Thus, the side of the sphere 40b that mates with the adjusting member 20 can be accommodated in the first groove 205, and the side of the sphere 40b that mates with the base 30 can be accommodated in the second groove 303. This improves the tightness of the fit between the sphere 40b and the adjusting member 20 and the base 30, facilitates the assembly of the sphere 40b, and enhances structural stability. When the adjusting member 20 and the base 30 rotate relative to each other, the sphere 40b can change the planar contact between the adjusting member 20 and the base 30 into a curved contact. Since friction is the normal force of objects contacting and pressing each other, and the direction of friction is always along the tangent of the contact surface, when the adjusting member 20 and the base 30 are in curved contact, a component force can be formed, thereby appropriately reducing the normal force and reducing friction. In addition, the sphere 40b can be made of a material that helps reduce friction, so as to further reduce the friction generated when the adjusting member 20 and the base 30 rotate relative to each other.

[0114] Combination Figure 16 and Figure 17 In some embodiments of this utility model, the sliding unit can also be a shim 40c. The adjusting member has a third groove 206, and the base has a fourth groove 304 opposite to the third groove 206. At least a portion of the shim 40c is disposed in the third groove 206 and the fourth groove 304. The side of the shim 40c that mates with the adjusting member 20 can be accommodated in the third groove 206, and the side of the shim 40c that mates with the base 30 can be accommodated in the fourth groove 304. This can improve the tightness of the fit between the ball 40b and the adjusting member 20 and the base 30, and also facilitate the assembly of the shim 40c, thereby improving structural stability. The shim 40c can be made of a material that reduces friction, so as to further reduce the friction generated when the adjusting member 20 and the base 30 rotate relative to each other. For example, the shim 40c can be a support structure with a low coefficient of friction.

[0115] In addition, since the sliding unit has a sheet-like structure, it can be easily placed between the adjusting part 20 and the base 30, which facilitates assembly. The shim 40c occupies less space and has a more regular shape, which helps to improve the compactness of the structure.

[0116] Combination Figures 1 to 17According to an embodiment of the present invention, the telescopic rod 100 includes a rod body 10 and the aforementioned adjusting device. An adjusting member 20 is connected to the end of the rod body 10; a base 30 is rotatably connected to the adjusting member 20. The adjusting member 20 is configured to adjust the relative position of the base 30 and the rod body 10 along the axial direction of the rod body 10. Specifically, the telescopic rod 100 can be supported between two walls. After installation, the telescopic rod 100 can be used to suspend objects. In use, the telescopic rod 100 can be adjusted to a predetermined length, and then the base 30 is aligned with the wall. To improve the fixing effect, the telescopic rod 100 is also provided with an adjusting member 20 for adjusting the distance between the rod body 10 and the base 30. One end of the adjusting member 20 is connected to the end of the rod body 10, thereby allowing the adjusting member 20 to be close to the base 30, so that the other end of the adjusting member 20 can be connected to the base 30.

[0117] According to the telescopic rod 100 of this utility model embodiment, under a certain operating torque of the user, the frictional torque that is not conducive to enhancing the friction between the anti-slip pad 33 on the base 30 and the wall can be reduced; the reduced frictional work is converted into beneficial work that is conducive to enhancing the friction between the anti-slip pad 33 on the base 30 and the wall. By increasing the beneficial work, the frictional force obtained under the same operating torque is much greater than that without the rolling bearing 40, thereby enabling the telescopic rod 100 to obtain a greater load-bearing capacity. Therefore, by setting the rolling bearing 40 between the adjusting member 20 and the base 30, most of the harmful work is converted into beneficial work, thereby increasing the load-bearing capacity of the telescopic rod 100.

[0118] Combination Figure 9 In some embodiments of this utility model, bases 30 are disposed on opposite sides of the rod 10 along its axial direction. The rod 10 includes an inner rod 11 and an outer rod 12, which are telescopically connected. One end of the outer rod 12 is connected to a base 30, and the other end is connected to one end of the inner rod 11. The other end of the inner rod 11 is connected to an adjusting member 20, which is connected to another base 30. The two bases 30 may have the same appearance to improve the overall structural consistency of the telescopic rod 100. The internal structures of the two bases may be different. The outer rod 12 can be directly connected to the base 30. When the inner rod 11 is connected to the base, the interior of the base on that side can be configured to cooperate with the adjusting member 20 and the rolling bearing 40.

[0119] Alternatively, the adjusting member 20 may be connected to the outer rod 12.

[0120] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0121] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0122] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0123] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0124] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0125] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An adjusting device for a telescopic rod (100), characterized in that, include: Adjusting component (20); A base (30) rotatably connected to the adjusting member (20); A buffer, at least a portion of which is disposed between the adjusting member (20) and the base (30), is used to reduce the frictional force when the adjusting member (20) and the base (30) rotate relative to each other.

2. The adjusting device according to claim 1, characterized in that, The buffer includes a rolling unit disposed between the adjusting member (20) and the base (30).

3. The adjusting device according to claim 2, characterized in that, The rolling unit includes a ball (40a) which is rotatably disposed between the adjusting member (20) and the base (30) along a direction about the rotational center axis of the base (30).

4. The adjusting device according to claim 3, characterized in that, The adjusting member (20) is provided with a first receiving groove (203), and a portion of the ball (40a) is rotatably disposed in the first receiving groove (203); and / or, the base (30) is provided with a second receiving groove (302), and a portion of the ball (40a) is rotatably disposed in the second receiving groove (302).

5. The adjusting device according to claim 1, characterized in that, The buffer includes a rolling bearing (40) disposed between the adjusting member (20) and the base (30).

6. The adjusting device according to claim 5, characterized in that, The rolling bearing (40) is configured to be located between the adjusting member (20) and the base (30) along the axial direction of the telescopic rod.

7. The adjusting device according to claim 5, characterized in that, The rolling bearing (40) is an integrally encased bearing. The end of the adjusting member (20) is provided with a third mating groove. One end of the integrally encased bearing is located in the third mating groove and is interference-fitted, while the other end abuts against the base (30); or The rolling bearing (40) includes a first housing (47), a second housing (48), and a ball (40a) unit. The first housing (47) covers the outside of the second housing (48) along the circumference of the rolling bearing (40). The ball (40a) unit is rotatably disposed between the first housing (47) and the second housing (48). The end of the adjusting member (20) is provided with a fourth mating groove (204). One end of the first housing (47) is disposed in the fourth mating groove (204), and the other end abuts against the base (30).

8. The adjusting device according to claim 1, characterized in that, The buffer includes a sliding unit, at least a portion of which is disposed between the adjusting member (20) and the base (30).

9. The adjusting device according to claim 8, characterized in that, The sliding unit includes a sliding bearing.

10. The adjusting device according to claim 8, characterized in that, The sliding unit includes at least one sphere (40b), the adjusting member (20) is provided with a first groove (205), the base (30) is provided with a second groove (303) opposite to the first groove (205), and at least a portion of the sphere (40b) is disposed in the first groove (205) and the second groove (303); or The sliding unit is a pad (40c), the adjusting member (20) is provided with a third groove (206), the base (30) is provided with a fourth groove (304) opposite to the third groove (206), and at least a portion of the pad (40c) is provided in the third groove (206) and the fourth groove (304).

11. A telescopic rod (100), characterized in that, include: Rod (10); The adjusting device according to any one of claims 1-10, wherein the adjusting member (20) is connected to the end of the rod (10), and the adjusting member (20) is configured to adjust the relative position of the base (30) and the rod (10) along the axial direction of the rod (10).

12. A telescopic rod (100), characterized in that, include: Rod (10); Adjusting member (20), the adjusting member (20) being connected to the end of the rod (10); A base (30) rotatably connected to the adjusting member (20), the adjusting member (20) being configured to adjust the relative position of the base (30) and the rod (10) along the axial direction of the rod (10); A bearing (40) is disposed between the adjusting member (20) and the base (30).

13. The telescopic rod (100) according to claim 12, characterized in that, The bearing (40) is configured to be disposed along the axial direction between the adjusting member (20) and the base (30).

14. The telescopic rod (100) according to claim 13, characterized in that, The base (30) includes a positioning buckle (31), the adjusting member (20) is provided with a positioning hole (201), the positioning buckle (31) is rotatably inserted through the positioning hole (201), and the positioning buckle (31) is snapped connected to the adjusting member (20). The bearing (40) is disposed between the base (30) and the adjusting member (20) and surrounds the positioning buckle (31).

15. The telescopic rod (100) according to claim 14, characterized in that, The adjusting member (20) is provided with a first mating groove (202), and the positioning buckle (31) is provided with a second mating groove (301). The first mating groove (202) and the second mating groove (301) are opposite to each other along the axial direction. The bearing (40) is positioned in the first mating groove (202) and the second mating groove (301) at both ends along the axial direction, respectively.

16. The telescopic rod (100) according to claim 14, characterized in that, The positioning buckle (31) includes an abutment part (311) and a positioning part (312). The positioning part (312) passes through the bearing (40) and is snapped together with the adjusting member (20). One end face of the abutment part (311) is connected to the positioning part (312) and abuts against the bearing (40). The other end face of the abutment part (311) abuts against the base (30).

17. The telescopic rod (100) according to claim 15, characterized in that, The bearing (40) includes a first cover (41), a second cover (42), and a needle roller unit (43). The first cover (41) and the second cover (42) are connected along the axial direction. The needle roller unit (43) is rotatably disposed between the first cover (41) and the second cover (42). The first cover (41) is disposed in the first mating groove (202), and the second cover (42) is disposed in the second mating groove (301). At least a portion of the needle roller unit (43) is located in the first mating groove (202); or The bearing (40) is a thrust plane needle roller bearing (40).

18. The telescopic rod (100) according to any one of claims 12-14, characterized in that, The adjusting member (20) includes a connecting part (21) and an adjusting part (22). The connecting part (21) is connected to the rod body (10), and the adjusting part (22) is connected to the base (30). The adjusting part (22) is threadedly engaged with the connecting part (21). The adjusting part (22) is configured to convert the circumferential rotational motion of the rod body (10) into the axial extensional motion of the rod body (10).

19. The telescopic rod (100) according to claim 18, characterized in that, The adjustment part (22) includes a main body (221) and a protrusion (222), and the bearing (40) passes through the protrusion (222) and abuts between the main body (221) and the base (30).

20. The telescopic rod (100) according to claim 12, characterized in that, The bearing (40) includes an inner ring (44), an outer ring (45), and a ball unit (46). The inner ring (44) is sleeved on the outside of the adjusting member (20), the outer ring (45) is disposed inside the base (30), and the ball unit (46) is rotatably disposed between the inner ring (44) and the outer ring (45). The ball unit (46) extends obliquely relative to the axis of the adjusting member (20).

21. The telescopic rod (100) according to claim 20, characterized in that, It also includes a baffle (32) disposed on the base (30) and stopping the outer ring (45) along the axial direction; and / or The bearing (40) is an angular contact ball bearing (40).

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