Telescopic rod

Abstract

The telescopic rod comprises a telescopic assembly, the telescopic assembly comprises a first rod, a second rod and a U-shaped elastic piece, a through hole is formed in the peripheral wall of the lower portion of the second rod, the U-shaped elastic piece is arranged in the second rod, a first abutting block capable of penetrating through the through hole is arranged at the end of the U-shaped elastic piece, the first abutting block is provided with a spherical end face, and the first rod is connected with the second rod in a sleeved mode. The second rod can extend out of or retract into the first rod; the unlocking assembly is arranged at the joint of the first rod and the second rod, the unlocking assembly comprises a fixed sleeve and a movable sleeve, the first rod is sleeved with the unlocking assembly, and the movable sleeve is in sliding connection with the fixed sleeve.

Description

Technical Field

[0001] This utility model relates to the field of telescopic pole technology, and in particular to a telescopic pole. Background Technology

[0002] A telescopic rod is a hollow cylindrical rod whose length is adjusted through a mechanical structure. It is generally composed of at least two cylindrical tubes connected together, and its extension and retraction are achieved through sliding fit.

[0003] However, existing telescopic poles lack a mechanism to lock the poles after they are extended, which means that the unextended poles can easily be accidentally thrown out under certain external forces, posing a certain safety hazard. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a telescopic rod that can prevent the rod members from swinging out arbitrarily, and can withstand a certain pressure without retracting, thus ensuring the safety of using the telescopic rod.

[0005] A telescopic rod according to an embodiment of the present utility model includes:

[0006] The telescopic assembly includes a first rod, a second rod, and a U-shaped spring. The lower peripheral wall of the second rod is provided with a through hole. The U-shaped spring is disposed inside the second rod. The end of the U-shaped spring is provided with a first abutting block that can pass through the through hole. The first abutting block has a spherical end face. The first rod and the second rod are sleeved together. The second rod can extend or retract into the first rod.

[0007] An unlocking component is located at the connection between the first rod and the second rod. The unlocking component includes a fixed sleeve and a movable sleeve. The fixed sleeve is fitted over the outside of the first rod, and the movable sleeve is fitted over the outside of the fixed sleeve. The movable sleeve and the fixed sleeve are slidably connected.

[0008] When the second rod needs to extend beyond the first rod, one end of the first abutting block passes through the through hole, and the outer wall of the first abutting block abuts against the end of the fixing sleeve, thus fixing the second rod to the first rod.

[0009] When the second rod needs to be retracted into the first rod, the movable sleeve moves toward the fixed sleeve, and the end of the movable sleeve pushes the first abutment block to retract into the second rod. The second rod and the first rod can slide relative to each other, and the second rod can be retracted into the first rod.

[0010] A telescopic rod according to an embodiment of the present utility model has at least the following beneficial effects: The telescopic rod of this application achieves automatic locking when the second rod is extended through the abutment design of the U-shaped spring piece and the fixed sleeve, making operation simple. That is, it can be understood that when the user pulls out the second rod, when the first abutment block of the U-shaped spring piece abuts against the end of the first rod, specifically, as shown... Figure 1As shown, a cavity is formed between the movable sleeve and the fixed sleeve to accommodate the first abutment block, allowing the currently pulled-out second rod to be locked, preventing it from being thrown out by external force and causing safety issues. Similarly, when multiple second rods are provided, the second rod with the smallest diameter will be pulled out first. When pulled out, the abutment block of the second rod with the smallest diameter passes through the through hole and enters the cavity between the movable sleeve and the fixed sleeve under the elastic force of the U-shaped spring, abutting against the end of the fixed sleeve. When the user needs to pull out a second second rod, the user only needs to continue pulling the already pulled-out second rod. Under a larger external force, the abutment block of the second rod with the smallest diameter is pushed back into the second rod by the squeezing of the movable sleeve. At this time, the second rod with the smallest diameter can be pulled out, and the next lower second rod can also be pulled out. The abutment block of the next lower second rod can abut against the end of the fixed sleeve, completing the locking. If the user wants to pull out more second rods, the above steps can be repeated. When the user needs to retract the second rod, simply slide the movable sleeve downwards. The movable sleeve will push the abutment block of the second rod back into the rod. The user can then push the second rod downwards to retract it into the first rod. The same operation can be performed when retracting other second rods.

[0011] According to an embodiment of the present utility model, a telescopic rod is provided in which the inner wall of the movable sleeve and the outer wall of the fixed sleeve form a first cavity. A return spring is provided in the first cavity, one end of which abuts against the fixed sleeve and the other end of which abuts against the movable sleeve.

[0012] According to an embodiment of the present utility model, a telescopic rod has a movable sleeve including a first kit and a second kit. The first kit is sleeved on the outside of the fixed sleeve, and one end of the second kit is sleeved with one end of the first kit. The inner wall of the first kit, the end of the second kit, and the outer wall of the fixed sleeve together form a first cavity.

[0013] According to an embodiment of the present utility model, a telescopic rod is provided with an internal thread on the inner wall of a first component and an external thread matching the internal thread on the outer wall of a second component, and the first component and the second component are threadedly connected.

[0014] According to an embodiment of the present utility model, a telescopic rod is provided in which the end of the second kit and the fixed sleeve and the outer wall of the second rod are together arranged to form a second cavity, and the first abutting block can enter and exit the second cavity.

[0015] According to an embodiment of the present utility model, a telescopic rod has a first guide portion on the inner wall of the second kit, and a first abutting block is movably connected to the first guide portion.

[0016] According to an embodiment of the present utility model, a telescopic rod has a second guide portion at the open end of the second kit, and a first abutting block is movably connected to the second guide portion.

[0017] According to an embodiment of the present invention, a telescopic rod has a limiting step provided on the inner wall of the fixing sleeve, and the end of the first rod abuts against the limiting step.

[0018] According to an embodiment of the present invention, a telescopic rod is provided in which multiple second rods are sequentially sleeved. The lower peripheral wall of the upper second rod and the upper peripheral wall of the lower second rod are provided with through holes that are aligned with each other in the same circumferential position. The end of the first abutting block of the U-shaped spring can pass through the through hole.

[0019] According to an embodiment of the present utility model, a telescopic rod has a second abutment block provided on the inner wall of the second rod near the end of the U-shaped spring piece, and the end of the lower-level second rod can abut against the second abutment block of the upper-level second rod.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a partial cross-sectional view of a telescopic rod according to an embodiment of the present utility model;

[0023] Figure 2 This is a cross-sectional view showing the connection of the two second rods in an embodiment of the present invention;

[0024] Figure 3 This is a structural diagram of a telescopic rod according to an embodiment of the present utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] First shot: 100;

[0027] Second rod 200; Second abutment block 210;

[0028] U-shaped spring 300; first abutment block 310;

[0029] Fixed sleeve 400; Limiting step 410;

[0030] 500; 510; 520; 521; 522; 530; 540;

[0031] Return spring 600. Detailed Implementation

[0032] 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] Reference Figures 1 to 3 This utility model provides a telescopic rod, including a telescopic assembly comprising a first rod 100, a second rod 200, and a U-shaped spring 300. The lower peripheral wall of the second rod 200 has a through hole. The U-shaped spring 300 is disposed within the second rod 200, and its end has a first abutment block 310 that can pass through the through hole. The first abutment block 310 has a spherical end face. The first rod 100 and the second rod 200 are sleeved together, and the second rod 200 can extend or retract into the first rod 100. An unlocking assembly is also provided. At the connection between the first rod 100 and the second rod 200, the unlocking component includes a fixed sleeve 400 and a movable sleeve 500. The fixed sleeve 400 is fitted outside the first rod 100, and the movable sleeve 500 is fitted outside the fixed sleeve 400. The movable sleeve 500 is slidably connected to the fixed sleeve 400. When the second rod 200 needs to extend out of the first rod 100, one end of the first abutment block 310 passes through the through hole, and the outer wall of the first abutment block 310 abuts against the end of the fixed sleeve 400, thus fixing the second rod 200 to the first rod 100.

[0037] When the second rod 200 needs to be retracted into the first rod 100, the movable sleeve 500 moves toward the fixed sleeve 400, and the end of the movable sleeve 500 pushes the first abutment block 310 to retract into the second rod 200. The second rod 200 and the first rod 100 can slide relative to each other, and the second rod 200 can be retracted into the first rod 100.

[0038] The telescopic rod of this application achieves automatic locking when the second rod 200 is extended through the abutment design of the U-shaped spring piece 300 and the fixed sleeve 400, making operation simple. That is, it can be understood that when the user pulls out the second rod 200, the first abutment block 310 of the U-shaped spring piece 300 abuts against the end of the first rod 100. Specifically, as shown... Figure 1 As shown, a cavity is formed between the movable sleeve 500 and the fixed sleeve 400 to accommodate the first abutment block 310, so that the currently pulled-out second rod 200 can be locked, preventing the second rod 200 from being thrown out by other second rods 200 under the action of external force, thus avoiding safety issues. Similarly, when multiple second rods 200 are provided, the second rod 200 with the smallest diameter will be pulled out first. When pulled out, the abutment block of the second rod 200 with the smallest diameter passes through the through hole and enters the cavity between the movable sleeve 500 and the fixed sleeve 400 under the elastic force of the U-shaped spring 300, and abuts against the end of the fixed sleeve 400. When the user needs to pull out a second second rod 200, the user only needs to continue pulling the second rod 200 that has already been pulled out. Under a larger external force, the abutment block of the second rod 200 with the smallest diameter is pushed back into the second rod 200 by the squeezing of the movable sleeve 500. At this time, the second rod 200 with the smallest diameter can be pulled out, and the next second rod 200 can also be pulled out. The abutment block of the next second rod 200 can abut against the end of the fixed sleeve 400 to complete the locking. If the user wants to pull out more second rods 200, the above steps can be repeated. When the user needs to retract the second rod 200, simply slide the movable sleeve 500 downwards. The movable sleeve 500 will push the abutment block of the second rod 200 back into the rod. The user can then push the second rod 200 downwards to retract it into the first rod 100. The same operation can be performed when retracting other second rods 200.

[0039] According to some embodiments of this application, the inner wall of the movable sleeve 500 and the outer wall of the fixed sleeve 400 form a first cavity 530. A return spring 600 is disposed in the first cavity 530, with one end of the return spring 600 abutting against the fixed sleeve 400 and the other end abutting against the movable sleeve 500. Specifically, as shown... Figure 1As shown, the movable sleeve 500 includes a first assembly 510 and a second assembly 520. The first assembly 510 is fitted onto the outside of the fixed sleeve 400. One end of the second assembly 520 is fitted onto one end of the first assembly 510. The inner wall of the first assembly 510, the end of the second assembly 520, and the outer wall of the fixed sleeve 400 together form a first cavity 530. The movable sleeve 500 has a split structure, which facilitates disassembly and maintenance, reducing repair costs. Furthermore, by adjusting the connection position between the first assembly 510 and the second assembly 520, the spring preload can be adjusted to adapt to different load requirements.

[0040] According to some embodiments of this application, the inner wall of the first assembly 510 is provided with an internal thread, and the outer wall of the second assembly 520 is provided with an external thread that matches the internal thread. The first assembly 510 and the second assembly 520 are threadedly connected. The threaded connection provides a high-strength connection, preventing the movable sleeve 500 from loosening. Furthermore, the spring preload can be finely adjusted by rotating the second assembly 520, improving the user experience.

[0041] According to some embodiments of this application, the ends of the second kit 520 and the fixing sleeve 400, together with the outer wall of the second rod 200, form a second cavity 540, and the first abutment block 310 can enter and exit the second cavity 540. That is, it can be understood that, referring to... Figure 1 When the second rod 200 is pulled out, the abutment block can be locked into the second cavity 540. That is, it can be understood that the second cavity 540 is a limiting cavity used to constrain the movement of the abutment block when the first rod 100 and the second rod 200 are locked.

[0042] As a further improvement to the design, as shown in the figure, the inner wall of the second assembly 520 is provided with a first guide portion 521, and the first abutment block 310 is movably connected to the first guide portion 521. That is, it can be understood that when the user continuously pulls the second rod 200, the friction between the abutment block and the inner wall of the second assembly 520 can be reduced, allowing the abutment block to be smoothly pushed back into the second rod 200, assisting the second rod 200 to be pulled out.

[0043] As a further improvement to the design, as shown in the figure, the open end of the second assembly 520 is provided with a second guide portion 522, and the first abutment block 310 is movably connected to the second guide portion 522. That is, it can be understood that the beveled design of the open end assists the abutment block in entering and exiting the second cavity 540, improving the smoothness of operation.

[0044] According to some embodiments of this application, the inner wall of the fixing sleeve 400 is provided with a limiting step 410, and the end of the first rod 100 abuts against the limiting step 410. The limiting step 410 restricts the insertion depth of the first rod 100, avoids structural damage, ensures that the relative position of the first rod 100 and the fixing sleeve 400 is fixed, and improves assembly efficiency.

[0045] According to some embodiments of this application, multiple second rods 200 are sequentially sleeved. The lower peripheral wall of the upper second rod 200 and the upper peripheral wall of the lower second rod 200 are provided with through holes that are aligned with each other in the same circumferential position. The end of the first abutting block 310 of the U-shaped spring 300 can pass through the through hole, which can realize flexible adjustment of the length of the telescopic rod to adapt to different scenario requirements.

[0046] Furthermore, a second abutment block 210 is provided on the inner wall of the second rod 200 near the end of the U-shaped spring piece 300, so that the end of the lower-level second rod 200 can abut against the second abutment block 210 of the upper-level second rod 200. The second abutment block 210 restricts the extension range of the lower-level second rod 200 to prevent it from falling off.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.

[0048] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A telescopic pole, characterized in that, include: A telescopic assembly includes a first rod, a second rod, and a U-shaped spring. The lower peripheral wall of the second rod is provided with a through hole. The U-shaped spring is disposed inside the second rod. The end of the U-shaped spring is provided with a first abutment block that can pass through the through hole. The first abutment block has a spherical end face. The first rod is sleeved with the second rod. The second rod can extend or retract into the first rod. An unlocking component is disposed at the connection between the first rod and the second rod. The unlocking component includes a fixed sleeve and a movable sleeve. The fixed sleeve is sleeved on the outside of the first rod, and the movable sleeve is sleeved on the outside of the fixed sleeve. The movable sleeve is slidably connected to the fixed sleeve. When the second rod needs to extend beyond the first rod, one end of the first abutting block passes through the through hole, and the outer wall of the first abutting block abuts against the end of the fixing sleeve, and the second rod is fixedly connected to the first rod; When the second rod needs to be retracted into the first rod, the movable sleeve moves toward the fixed sleeve, and the end of the movable sleeve pushes the first abutment block to retract into the second rod. The second rod and the first rod can slide relative to each other, and the second rod can be retracted into the first rod.

2. A telescopic rod according to claim 1, characterized in that, The inner wall of the movable sleeve and the outer wall of the fixed sleeve form a first cavity. A return spring is provided in the first cavity. One end of the return spring abuts against the fixed sleeve, and the other end abuts against the movable sleeve.

3. A telescopic rod according to claim 2, characterized in that, The movable sleeve includes a first kit and a second kit. The first kit is fitted over the outside of the fixed sleeve. One end of the second kit is fitted over one end of the first kit. The inner wall of the first kit, the end of the second kit, and the outer wall of the fixed sleeve together form the first cavity.

4. A telescopic rod according to claim 3, characterized in that, The inner wall of the first kit is provided with an internal thread, and the outer wall of the second kit is provided with an external thread that matches the internal thread. The first kit and the second kit are threadedly connected.

5. A telescopic rod according to claim 3, characterized in that, The second kit, the end of the fixing sleeve, and the outer wall of the second rod together form a second cavity, and the first abutting block can enter and exit the second cavity.

6. A telescopic rod according to claim 5, characterized in that, The inner wall of the second kit is provided with a first guide portion, and the first abutting block is movably connected to the first guide portion.

7. A telescopic rod according to claim 5, characterized in that, The second kit has a second guide portion at its open end, and the first abutting block is movably connected to the second guide portion.

8. A telescopic rod according to claim 1, characterized in that, The inner wall of the fixed sleeve is provided with a limiting step, and the end of the first rod abuts against the limiting step.

9. A telescopic rod according to claim 1, characterized in that, Multiple second rods are sequentially connected. The lower peripheral wall of the second rod at the upper level and the upper peripheral wall of the second rod at the lower level are provided with through holes that are aligned with each other in the same circumferential position. The end of the first abutting block of the U-shaped spring can pass through the through hole.

10. A telescopic rod according to claim 9, characterized in that, A second abutment block is provided on the inner wall of the second rod near the end of the U-shaped spring sheet, and the end of the second rod located at the lower level can abut against the second abutment block of the second rod located at the upper level.

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