A positioning structure for telescopic umbrella rod

Abstract

This utility model discloses a positioning structure for the telescopic movement of an umbrella rod, including an inner tube, an outer tube, and a positioning ball. The lower end of the outer tube has a positioning hole on its side. The inner tube contains a push-pull rod that pushes the positioning ball into the positioning hole. A connector is mounted at the top of the inner tube. One side of the connector has a sliding groove that allows the positioning ball to slide along the diameter of the inner tube and communicates with the positioning hole. The bottom of the connector has a limiting groove that allows the upper section of the push-pull rod to slide along the length of the inner tube. The top of the limiting groove communicates with the bottom of the sliding groove, and its diameter is smaller than the diameter of the positioning ball. The top of the push-pull rod has an inclined surface that pushes the positioning ball towards the opening of the sliding groove. The connector has an elastic element that pushes the top of the push-pull rod into the sliding groove. This utility model utilizes the push-pull rod and the elastic element to automatically push the positioning ball, resulting in smooth and effortless positioning, locking, and retraction of the telescopic movement of the umbrella rod. Overall, it has the advantages of good positioning stability, smooth telescopic movement, and effortless telescopic retraction.

Description

Technical Field

[0001] This utility model belongs to the field of umbrellas, and more specifically, it relates to a positioning structure for the telescopic extension of the umbrella rod. Background Technology

[0002] Folding umbrellas are a type of umbrella with the advantage of being short in length, making them easy for users to carry and store. The main pole of a folding umbrella is generally a telescopic structure consisting of multiple inner and outer tubes that are nested together. Adjacent tubes are locked together by a positioning structure. The traditional positioning structure generally consists of positioning pins and springs. The positioning pins are connected to the inner wall of the inner tube by the spring. The spring compresses the positioning pins and they engage with the positioning holes in the outer tubes, thus locking the adjacent inner and outer tubes together. However, when the main pole is folded, the umbrella canopy or outer tube is pulled down. This not only applies a pushing force to the positioning pins to release the locking between the two tubes, but the positioning pins are also subjected to a downward pushing force perpendicular to the extension and retraction of the spring, causing the spring to bend and deform and shift. When the umbrella springs back, the positioning pins may not align with the positioning holes or may get stuck, affecting the normal use of the main pole's extension and retraction and resulting in low stability of the locking mechanism.

[0003] Currently, the existing positioning structures for the inner and outer tubes of the umbrella's inner rod, such as Figure 1 As shown, when the elastic piece 7c rises with the inner tube to the locking groove 10a, the elastic piece 7c is locked in the locking groove 10a to achieve initial positioning and locking when the inner tube 51 extends out of the outer tube 41. The pin 91 is used for locking the elastic piece 7c after it enters the locking groove 10a. The positioning and locking stability is good. However, when the inner and outer tubes are retracted, because the elastic piece 7c is positioned by its own elasticity and the bottom of the elastic piece 7c is in surface contact with the locking groove 10a, the friction is large, which causes the extension and retraction of the middle rod to be unsmooth. Moreover, a large amount of force is required to remove the elastic piece 7c from the locking groove 10a. Overall, there are problems such as low positioning stability of the middle rod extension and retraction, difficulty in the extension and retraction of the middle rod, and difficulty in retracting the middle rod. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a positioning structure for the telescopic extension of the umbrella rod, which has the advantages of good positioning stability of the telescopic extension of the rod, smooth telescopic extension of the rod, and effortless telescopic retraction of the rod.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A positioning structure for the telescopic extension of an umbrella rod includes an inner tube, an outer tube, and a positioning ball. The lower end of the outer tube has a positioning hole on its side for the positioning ball to engage. The inner tube contains a push-pull rod that pushes the positioning ball into the positioning hole. A connector is installed at the top of the inner tube. A sliding groove is provided on one side of the connector for the positioning ball to slide along the diameter of the inner tube. A limiting groove is provided at the bottom of the connector for the upper section of the push-pull rod to slide along the length of the inner tube. The opening of the sliding groove communicates with the positioning hole. The top of the limiting groove communicates with the bottom of the sliding groove, and its diameter is smaller than the diameter of the positioning ball. The top of the push-pull rod has an inclined surface for pushing the positioning ball towards the opening of the sliding groove. The connector has an elastic element for pushing the top of the push-pull rod into the sliding groove.

[0007] Further configuration: The elastic element is a compression spring, which is sleeved on the outer circumference of the push-pull rod. The connector has a groove for placing the compression spring, and the outer side of the upper end of the push-pull rod has a blocking part. The top end of the compression spring contacts the bottom of the blocking part, and the bottom end contacts the bottom wall of the groove.

[0008] Further configuration: The push-pull rod includes a push block and a long pull rod, the bottom of the push block is fixedly connected to the top of the long pull rod, and the blocking part is located at the bottom of the push block.

[0009] Further configuration: The push-pull rod includes a push block, a long pull rod, and an L-shaped short rod. The bottom of the push block is connected to the top of the vertical section of the short rod, and the blocking part is located at the bottom of the push block. A connecting sleeve is connected to the top of the long pull rod. A limiting groove for placing the vertical section of the short rod is opened on one side of the connecting sleeve, and an insertion hole for inserting the horizontal section of the short rod is opened on the opposite side of the connecting sleeve. The insertion hole communicates with the bottom side of the limiting groove. An opening for removing the push-pull rod and the compression spring is opened on one side of the connecting member. The opening communicates with the limiting groove and the recess.

[0010] Further configuration: The inclined surface is arc-shaped and located on the side of the push block that is close to the opening of the sliding groove.

[0011] Further configuration: a positioning piece is fitted between the inner wall of the outer tube and the outer side of the inner tube; a through hole is opened on the side of the top end of the inner tube; a positioning groove is opened on one outer side of the connector; a positioning block is connected to one side of the positioning piece for pressing the connector against the inner wall of the inner tube relative to the other outer side; the positioning block passes through the through hole and is inserted into the positioning groove.

[0012] Further configuration: The connector includes a positioning part and a connecting rod part, the bottom of the positioning part is connected to the top of the connecting rod part; the positioning part is located outside the top end of the inner tube, and its bottom end face abuts against the top end face of the inner tube; the connecting rod part is located inside the top end of the inner tube; the sliding groove is opened on one side of the positioning part; the inner wall of the outer tube fits against one side of the positioning part; the limiting groove is opened on the connecting rod part; and the positioning groove is opened on the other side of the connecting rod part.

[0013] Further configuration: The connector is a connecting rod, which is detachably inserted into the top end of the inner tube, and a round hole communicating with the sliding groove opening is provided on the side of the top end of the inner tube.

[0014] Further feature: A stop block is detachably connected inside the bottom end of the outer tube to prevent the positioning piece from sliding out of the outer tube.

[0015] Further details: Both the push-pull rod and the connector are made of glass fiber or carbon fiber materials.

[0016] In summary, this utility model utilizes a push-pull rod, an elastic element, and a sliding groove, taking advantage of the elastic force of the elastic element to automatically push the push-pull rod into the sliding groove. The inclined surface at the top of the push-pull rod then pushes the positioning ball towards the positioning hole until the positioning ball is locked in the positioning hole. This achieves automatic positioning and locking of the inner and outer tubes. A limiting groove ensures that the push-pull rod slides directionally upwards or downwards along the length of the inner tube during its movement in and out of the sliding groove, guaranteeing the positioning ball is stably locked in the positioning hole and improving the positioning stability of the telescopic movement of the central rod. When it is necessary to release the inner tube... When locking and positioning the outer tube, simply pull down the push-pull rod until the top of the push-pull rod is completely away from the sliding groove. The positioning ball loses the pushing force of the inclined surface of the push-pull rod and falls from the positioning hole into the sliding groove, thus releasing the locking and positioning function of the positioning ball on the inner and outer tubes. During the process of closing the inner and outer tubes after the locking and positioning is released, when the positioning hole and the groove opening of the sliding groove are misaligned, the push-pull rod can be released, achieving the function of quickly and effortlessly closing the middle rod.

[0017] This invention ensures smooth positioning and retraction of the central rod, saving time and effort. The direction of the elastic element's extension and retraction is the same as that of the central rod, avoiding the problem of bending and deformation of the elastic element. Each component is easy to manufacture and has low cost. It has the advantages of good positioning stability of the central rod extension and retraction, smooth extension and retraction of the central rod, and effortless retraction and retraction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the positioning structure of the inner and outer tubes of the existing umbrella rod;

[0019] Figure 2A schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0020] Figure 3 This is an exploded view of the entire embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the connector and push-pull rod in Embodiment 1 of this utility model;

[0022] Figure 5 This is an exploded view of the connector and push-pull rod according to Embodiment 1 of this utility model;

[0023] Figure 6 This is a partial cross-sectional view of Embodiment 1 of the present utility model;

[0024] Figure 7 This is a schematic diagram of the connecting piece and push-pull rod in Embodiment 2 of this utility model;

[0025] Figure 8 This is a schematic diagram of the connecting piece and push-pull rod in Embodiment 3 of this utility model;

[0026] Figure 9 This is a partial cross-sectional view of Embodiment 3 of the present invention;

[0027] Figure 10 This is a partial structural diagram of the connector, push-pull rod, and inner tube in Embodiment 4 of this utility model.

[0028] In the diagram: 1. Inner tube; 2. Outer tube; 3. Positioning ball; 4. Positioning hole; 5. Push-pull rod; 6. Connector; 7. Sliding groove; 8. Limiting groove; 9. Inclined surface; 10. Compression spring; 11. Groove; 12. Blocking part; 13. Push block; 14. Long pull rod; 15. Short rod; 16. Connecting sleeve; 17. Limiting through groove; 18. Insertion hole; 19. Opening; 20. Positioning piece; 21. Through hole; 22. Positioning groove; 23. Positioning block; 24. Positioning part; 25. Connecting rod part; 26. Connecting rod; 27. Round hole; 28. Stop block. Detailed Implementation

[0029] To explain the technical content, objectives, and effects of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings. It should be noted that the terms "upper" and "lower" used in the following description refer to the attached drawings. Figure 1 The direction in the middle, the words "bottom" and "top" refer to the attached Figure 1 The direction towards the geometric center of a specific component.

[0030] Please refer to Figures 2 to 10As shown, a positioning structure for the telescopic extension of an umbrella rod includes an inner tube 1, an outer tube 2, and a positioning ball 3. The lower end of the outer tube 2 has a positioning hole 4 for the positioning ball 3 to be inserted into. The inner tube 1 has a push-pull rod 5 that pushes the positioning ball 3 into the positioning hole 4. A connector 6 is installed at the top of the inner tube 1. A sliding groove 7 is provided on one side of the connector 6 for the positioning ball 3 to slide along the diameter of the inner tube 1. A limiting groove 8 is provided at the bottom of the connector 6 for the upper section of the push-pull rod 5 to slide along the length of the inner tube 1. The opening of the sliding groove 7 communicates with the positioning hole 4. The top of the limiting groove 8 communicates with the bottom of the sliding groove 7, and its diameter is smaller than the diameter of the positioning ball 3. The top of the push-pull rod 5 has an inclined surface 9 for pushing the positioning ball 3 towards the opening of the sliding groove 7. The connector 6 has an elastic element for pushing the top of the push-pull rod 5 into the sliding groove 7.

[0031] As described above, when the middle rod needs to be retracted, firstly, by grasping the bottom of the push-pull rod 5, the push-pull rod 5 is pulled downwards. The upper section of the push-pull rod 5 slides downwards within the limiting groove 8 until the top of the push-pull rod 5 leaves the sliding groove 7. The positioning ball 3 loses the pushing force of the inclined surface 9 of the push-pull rod 5, and the positioning ball 3 falls from the positioning hole 4 into the sliding groove 7, thus releasing the locking and positioning function of the positioning ball 3 on the inner tube 1 and the outer tube 2. During the process of closing the inner tube 1 and outer tube 2 of the locking and positioning, after the positioning hole 4 and the groove opening of the sliding groove 7 are misaligned, the push-pull rod 5 can be released. At this time, the groove opening of the sliding groove 7 is blocked by the inner wall of the outer tube 2. Although the top of the push-pull rod 5 will re-enter the sliding groove 7 under the action of the elastic restoring force of the elastic element, and push the positioning ball 3 to the groove opening near the sliding groove 7 using the inclined surface 9, the positioning ball 3 is limited to the sliding groove 7 due to the obstruction of the inner wall of the outer tube 2.

[0032] When the middle rod needs to be unfolded, the outer tube 2 is slid upward until the positioning hole 4 at the lower end of the outer tube 2 is connected to the groove of the sliding groove 7. At this time, the positioning ball 3 is not resisted by the inner wall of the outer tube 2. Under the elastic restoring force of the elastic element, the top of the push-pull rod 5 continues to move upward. The inclined surface 9 of the push-pull rod 5 pushes the positioning ball 3 towards the positioning hole 4 until the push-pull rod 5 locks the positioning ball 3 in the positioning hole 4. The push-pull rod 5 no longer moves upward, thereby achieving the function of locking the unfolded inner tube 1 and outer tube 2. In addition, the diameter of the limiting groove 8 is set to be smaller than the diameter of the positioning ball 3 to ensure that the positioning ball 3 always slides back and forth in the sliding groove 7.

[0033] Furthermore, the elastic element is a compression spring 10, which is sleeved on the outer circumference of the push-pull rod 5. The connector 6 has a groove 11 for placing the compression spring 10, and a blocking part 12 is provided on the outer side of the upper end of the push-pull rod 5. The top end of the compression spring 10 contacts the bottom of the blocking part 12, and the bottom end contacts the bottom wall of the groove 11.

[0034] As can be seen from the above description, when the push-pull rod 5 is pulled down, the blocking part 12 moves towards the bottom of the groove 11 along with the push-pull rod 5. Under the pushing of the blocking part 12 and the blocking action of the bottom of the groove 11, the compression spring 10 is compressed again. After the push-pull rod 5 is released, under the action of the rebound force of the compression spring 10, the top of the push-pull rod 5 continues to move upward. The inclined surface 9 of the push-pull rod 5 will continue to push the positioning ball 3 towards the positioning hole 4 until the push-pull rod 5 jams the positioning ball 3 on the positioning hole 4. The push-pull rod 5 no longer moves upward, thereby achieving the function of locking the unfolded inner tube 1 and outer tube 2.

[0035] Furthermore, the push-pull rod 5 includes a push block 13 and a long pull rod 14. The bottom of the push block 13 is fixedly connected to the top of the long pull rod 14, and the blocking part 12 is provided at the bottom of the push block 13.

[0036] As described above, when the middle rod needs to be retracted, firstly, grasp the bottom of the long pull rod 14 and gently pull the long pull rod 14 downwards, causing the push block 13 and the blocking part 12 to slide downwards. The push block 13, the upper section of the long pull rod 14 and the blocking part 12 slide downwards along the length of the inner tube 1 within the limiting groove 8. Under the obstruction of the groove 11, the compression spring 10 is compressed until the top of the push block 13 leaves the sliding groove 7. The positioning ball 3 loses the pushing force of the inclined surface 9 of the push rod 5, and the positioning ball 3 falls from the positioning hole 4 into the sliding groove 7, thus realizing the function of releasing the locking and positioning of the positioning ball 3 on the inner tube 1 and the outer tube 2. When the middle rod needs to be unfolded, under the elastic force of the compression spring 10, the push block 13 is driven into the sliding groove 7. The inclined surface 9 of the push block 13 is used to push and lock the positioning ball 3 into the positioning hole 4.

[0037] Furthermore, the push-pull rod 5 includes a push block 13, a long pull rod 14, and an L-shaped short rod 15. The bottom of the push block 13 is connected to the top of the vertical section of the short rod 15, and the blocking part 12 is located at the bottom of the push block 13. The top of the long pull rod 14 is connected to a connecting sleeve 16. One side of the connecting sleeve 16 is provided with a limiting groove 17 for placing the vertical section of the short rod 15, and the opposite side of the connecting sleeve 16 is provided with an insertion hole 18 for inserting the horizontal section of the short rod 15. The insertion hole 18 communicates with the bottom side of the limiting groove 17. One side of the connector 6 is provided with an opening 19 for taking out the push-pull rod 5 and the compression spring 10. The opening 19 communicates with the limiting groove 8 and the groove 11.

[0038] As described above, when the middle rod needs to be retracted, firstly, grasp the bottom of the long pull rod 14 and gently pull it downwards. This causes the short rod 15, connecting sleeve 16, push block 13, and blocking part 12 to slide downwards. The push block 13, short rod 15, and blocking part 12 slide downwards along the length of the inner tube 1 within the limiting groove 8. Under the obstruction of the groove 11, the compression spring 10 is compressed until the top of the push block 13 leaves the sliding groove 7. The positioning ball 3 loses the pushing force of the inclined surface 9 of the push block 13, and the positioning ball 3 falls from the positioning hole 4 into the sliding groove 7, thus realizing the function of releasing the locking and positioning of the positioning ball 3 on the inner tube 1 and the outer tube 2. By setting the connecting sleeve 16, limiting part 12, and connecting sleeve 13, the long pull rod 14 is retracted. The through groove 17, the insertion hole 18, and the opening 19 facilitate the disassembly and assembly of the push-pull rod 5. When it is necessary to assemble the push-pull rod 5, first manually grasp the push block 13 and the short rod 15 that are fixedly connected together, put the compression spring 10 on the outer circumference of the short rod 15, with one end of the compression spring 10 in contact with the bottom of the push block 13, and then put the assembled push block 13, short rod 15, and compression spring 10 into the limiting groove 8 through the opening 19. The compression spring 10 is placed in the groove 11, with the other end of the compression spring 10 in contact with the bottom wall of the groove 11. After that, place the lower vertical section of the short rod 15 into the limiting through groove 17, and insert the horizontal section of the short rod 15 into the insertion hole 18 to complete the assembly of the push-pull rod 5.

[0039] Furthermore, the inclined surface 9 is arranged in an arc shape and is located on the side of the push block 13 that is close to the opening of the sliding groove 7.

[0040] As can be seen from the above description, setting the inclined surface 9 to be arc-shaped makes it easier for the inclined surface 9 to better support the positioning ball 3, increase the contact area between the inclined surface 9 and the positioning ball 3, prevent the positioning ball 3 from shaking, and further improve the positioning stability of the positioning ball 3 on the inner and outer tubes 2.

[0041] Furthermore, a positioning piece 20 is fitted between the inner wall of the outer tube 2 and the outer side of the inner tube 1. A through hole 21 is opened on the side of the top end of the inner tube 1, and a positioning groove 22 is opened on one outer side of the connector 6. A positioning block 23 is connected to one side of the positioning piece 20 for pressing the connector 6 against the inner wall of the inner tube 1 relative to the other outer side. The positioning block 23 passes through the through hole 21 and is inserted into the positioning groove 22.

[0042] As can be seen from the above description, by passing the positioning block 23 of the positioning piece 20 through the through hole 21 and inserting it into the positioning groove 22, the connecting piece 6 is prevented from sliding up and down, thus limiting the position of the connecting piece 6; by setting the positioning piece 20 to be attached between the outer side of the inner tube 1 and the inner wall of the outer tube 2, the connecting piece 6 is pressed against the inner wall of the inner tube 1, preventing the connecting piece 6 and the positioning piece 20 from shaking, thus ensuring the connection stability between the connecting piece 6 and the top of the inner tube 1.

[0043] Furthermore, the connector 6 includes a positioning part 24 and a connecting rod part 25. The bottom of the positioning part 24 is connected to the top of the connecting rod part 25. The positioning part 24 is located outside the top of the inner tube 1, and its bottom end face abuts against the top surface of the inner tube 1. The connecting rod part 25 is located inside the top of the inner tube 1. A sliding groove 7 is opened on one side of the positioning part 24. The inner wall of the outer tube 2 fits against one side of the positioning part 24. A limiting groove 8 is opened on the connecting rod part 25. A positioning groove 22 is opened on the other side of the connecting rod part 25.

[0044] As described above, when it is necessary to assemble the connector 6 with the push-pull rod 5 installed on the top of the inner tube 1, firstly, the connecting rod 25 is inserted into the inner tube 1. When the bottom end face of the positioning part 24 contacts the top end face of the inner tube 1, the initial positioning of the connector 6 is completed. Then, the positioning block 23 of the positioning piece 20 is passed through the through hole 21 of the inner tube 1 and inserted into the positioning groove 22 of the connecting rod 25 to achieve secondary positioning of the connector 6 and prevent the connector 6 from sliding up and down. After that, the outer tube 2 is sleeved on the outer tube 1 so that the positioning piece 20 is attached to the outer side of the inner tube 1 and the inner wall of the outer tube 2, so that the connector 6 is pressed against the inner wall of the inner tube 1. The inner wall of the outer tube 2 is attached to one side of the positioning part 24 to prevent the positioning ball 3 from falling out of the gap between the inner wall of the outer tube 2 and the positioning part 24.

[0045] Furthermore, the connector 6 is a connecting rod 26, which is detachably inserted into the top end of the inner tube 1. The side of the top end of the inner tube 1 is provided with a round hole 27 that communicates with the opening of the sliding groove 7.

[0046] As can be seen from the above description, when the connecting rod 26 is located inside the inner tube 1, when the positioning ball 3 is pushed by the inclined surface 9 of the push-pull rod 5, the stuck side of the positioning ball 3 first enters the round hole 27 from the groove of the sliding groove 7, and then gets stuck in the positioning hole 4 through the round hole 27.

[0047] Furthermore, a stop 28 is detachably connected to the bottom end of the outer tube 2 to prevent the positioning piece 20 from sliding out of the outer tube 2.

[0048] As can be seen from the above description, the bottom of the positioning piece 20 contacts the top of the stop 28 to prevent the top of the inner tube 1 from sliding out from the bottom of the outer tube, thus limiting the extension and retraction of the inner and outer tubes 2.

[0049] Furthermore, both the push-pull rod 5 and the connector 6 are made of glass fiber or carbon fiber.

[0050] As can be seen from the above description, by using these two materials, and taking advantage of the good chemical stability, strongness, corrosion resistance and wear resistance of glass fiber or carbon fiber, the push-pull rod 5 and the connector 6 have the advantages of low wear and good stability during use.

[0051] Reference Figures 2 to 6 The first embodiment provided by this utility model is as follows:

[0052] A positioning structure for telescopic umbrella rods includes an inner tube 1, an outer tube 2, and a positioning ball 3. The lower end of the outer tube 2 has a positioning hole 4 for the positioning ball 3 to be inserted into. The inner tube 1 has a push-pull rod 5 that pushes the positioning ball 3 into the positioning hole 4. A connector 6 is installed at the top of the inner tube 1. A sliding groove 7 is provided on one side of the connector 6 for the positioning ball 3 to slide along the diameter of the inner tube 1. A limiting groove 8 is provided at the bottom of the connector 6 for the upper section of the push-pull rod 5 to slide along the length of the inner tube 1. The opening of the sliding groove 7 communicates with the positioning hole 4. The top of the limiting groove 8 communicates with the bottom of the sliding groove 7, and its diameter is smaller than the diameter of the positioning ball 3. The top of the push-pull rod 5 has an inclined surface 9 for pushing the positioning ball 3 towards the opening of the sliding groove 7. The connector 6 has an elastic element for pushing the top of the push-pull rod 5 into the sliding groove 7.

[0053] The elastic element is a compression spring 10, which is sleeved on the outer circumference of the push-pull rod 5. The connector 6 has a groove 11 for placing the compression spring 10. A blocking part 12 is provided on the outer side of the upper end of the push-pull rod 5. The top end of the compression spring 10 contacts the bottom of the blocking part 12, and the bottom end contacts the bottom wall of the groove 11.

[0054] The push-pull rod 5 includes a push block 13, a long pull rod 14, and an L-shaped short rod 15. The bottom of the push block 13 is connected to the top of the vertical section of the short rod 15, and a blocking part 12 is provided at the bottom of the push block 13. The top of the long pull rod 14 is connected to a connecting sleeve 16. One side of the connecting sleeve 16 is provided with a limiting through groove 17 for placing the vertical section of the short rod 15, and the opposite side of the connecting sleeve 16 is provided with an insertion hole 18 for inserting the horizontal section of the short rod 15. The insertion hole 18 communicates with the bottom side of the limiting through groove 17. One side of the connecting piece 6 is provided with an opening 19 for taking out the push-pull rod 5 and the compression spring 10. The opening 19 communicates with the limiting groove 8 and the groove 11. The inclined surface 9 is arc-shaped and is provided on the side of the push block 13 that is close to the opening of the sliding groove 7.

[0055] A positioning piece 20 is fitted between the inner wall of the outer tube 2 and the outer side of the inner tube 1. A through hole 21 is opened on the side of the top end of the inner tube 1, and a positioning groove 22 is opened on one outer side of the connector 6. A positioning block 23 is connected to one side of the positioning piece 20 for pressing the connector 6 against the inner wall of the inner tube 1 relative to the other outer side. The positioning block 23 passes through the through hole 21 and is inserted into the positioning groove 22. A stop block 28 is detachably connected to the bottom end of the outer tube 2 to prevent the positioning piece 20 from sliding out of the outer tube 2.

[0056] The connector 6 includes a positioning part 24 and a connecting rod part 25. The bottom of the positioning part 24 is connected to the top of the connecting rod part 25. The positioning part 24 is located outside the top of the inner tube 1, and its bottom end face abuts against the top face of the inner tube 1. The connecting rod part 25 is located inside the top of the inner tube 1. A sliding groove 7 is opened on one side of the positioning part 24. The inner wall of the outer tube 2 fits against one side of the positioning part 24. A limiting groove 8 is opened on the connecting rod part 25, and a positioning groove 22 is opened on the other side of the connecting rod part 25. The push-pull rod 5 and the connector 6 are both made of glass fiber or carbon fiber materials. They are not limited to the above two materials. Other materials that can ensure that the push-pull rod 5 and the connector 6 can achieve their basic functions (pushing the positioning ball 3) while also giving the push-pull rod 5 and the connector 6 the advantages of low wear and good stability are also acceptable.

[0057] Example 2 differs from Example 1 in that, as Figure 7 As shown, the push-pull rod 5 includes a push block 13 and a long pull rod 14. The bottom of the push block 13 is fixedly connected to the top of the long pull rod 14. The blocking part 12 is provided at the bottom of the push block 13. The inclined surface 9 is arc-shaped and is provided on the side of the push block 13 close to the opening of the sliding groove 7.

[0058] Example 3 differs from Example 1 in that, as follows: Figure 8 and Figure 9 As shown, the connector 6 is a connecting rod 26, which is detachably inserted into the top end of the inner tube 1. A round hole 27 communicating with the groove opening of the sliding groove 7 is provided on the side of the top end of the inner tube 1.

[0059] Example 4 differs from Example 1 in that, as Figure 10 As shown, the connector 6 is located above the top of the inner tube 1. The bottom of the connector 6 is fixedly or detachably connected to the top of the inner tube 1. The connection method can be, for example, threaded connection, snap-fit, plug-in or welding. It is not limited to the methods mentioned above. Any other method that can detachably or fixedly connect the connector 6 to the top of the inner tube 1 is acceptable.

[0060] In summary, the working process of this utility model is as follows: When it is necessary to retract the central rod, firstly, grasp the bottom of the push-pull rod 5 and gently pull the push-pull rod 5 downward. The upper section of the push-pull rod 5 drives the blocking part 12 to slide downward in the limiting groove 8. Under the obstruction of the groove 11, the compression spring 10 is compressed until the top of the push-pull rod 5 leaves the sliding groove 7. The positioning ball 3 loses the pushing force of the inclined surface 9 of the push-pull rod 5, and the positioning ball 3 falls from the positioning hole 4 into the sliding groove 7, thus achieving the desired result. Release the locking and positioning function of the positioning ball 3 on the inner tube 1 and the outer tube 2; after the positioning hole 4 and the groove opening of the sliding groove 7 are misaligned, the push-pull rod 5 can be released. At this time, the groove opening of the sliding groove 7 is blocked by the inner wall of the outer tube 2. Although the top of the push-pull rod 5 will re-enter the sliding groove 7 under the elastic force of the compression spring 10, and push the positioning ball 3 to the groove opening near the sliding groove 7 using the inclined surface 9, the positioning ball 3 is limited to the sliding groove 7 due to the obstruction of the inner wall of the outer tube 2.

[0061] When it is necessary to unfold and lock the middle rod, slide the outer tube 2 upward until the positioning hole 4 at the lower end of the outer tube 2 is connected to the groove of the sliding groove 7. At this time, the positioning ball 3 is not resisted by the inner wall of the outer tube 2. Under the restoring force of the compression spring 10, the top of the push-pull rod 5 continues to move upward. The inclined surface 9 of the push-pull rod 5 will continue to push the positioning ball 3 towards the positioning hole 4 until the push-pull rod 5 locks the positioning ball 3 in the positioning hole 4. The push-pull rod 5 no longer moves upward, thereby achieving the function of locking the unfolded inner tube 1 and outer tube 2.

[0062] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A positioning structure for the telescopic extension of an umbrella rod, comprising an inner tube, an outer tube, and a positioning ball, wherein a positioning hole is provided on the side of the lower end of the outer tube for the positioning ball to be inserted, characterized in that: The inner tube is equipped with a push-pull rod that pushes a positioning ball into a positioning hole. A connector is installed at the top of the inner tube. A sliding groove is provided on one side of the connector for the positioning ball to slide along the diameter of the inner tube. A limiting groove is provided at the bottom of the connector for the upper section of the push-pull rod to slide along the length of the inner tube. The opening of the sliding groove communicates with the positioning hole. The top of the limiting groove communicates with the bottom of the sliding groove, and the diameter of the opening is smaller than the diameter of the positioning ball. The top of the push-pull rod is provided with an inclined surface that pushes the positioning ball toward the opening of the sliding groove. The connector is provided with an elastic element for pushing the top of the push-pull rod into the sliding groove.

2. The positioning structure for the telescopic extension of an umbrella rod according to claim 1, characterized in that: The elastic element is a compression spring, which is sleeved on the outer circumference of the push-pull rod. The connector has a groove for placing the compression spring, and a blocking part is provided on the outer side of the upper end of the push-pull rod. The top end of the compression spring contacts the bottom of the blocking part, and the bottom end contacts the bottom wall of the groove.

3. The positioning structure for the telescopic extension of an umbrella rod according to claim 2, characterized in that: The push-pull rod includes a push block and a long pull rod. The bottom of the push block is fixedly connected to the top of the long pull rod, and the blocking part is located at the bottom of the push block.

4. The positioning structure for the telescopic extension of an umbrella rod according to claim 2, characterized in that: The push-pull rod includes a push block, a long pull rod, and an L-shaped short rod. The bottom of the push block is connected to the top of the vertical section of the short rod, and the blocking part is located at the bottom of the push block. The top of the long pull rod is connected to a connecting sleeve. One side of the connecting sleeve has a limiting groove for placing the vertical section of the short rod, and the opposite side of the connecting sleeve has an insertion hole for inserting the horizontal section of the short rod. The insertion hole communicates with the bottom side of the limiting groove. One side of the connector has an opening for removing the push-pull rod and the compression spring, and the opening communicates with the limiting groove and the recess.

5. A positioning structure for the telescopic extension of an umbrella rod according to any one of claims 3 or 4, characterized in that: The inclined surface is arc-shaped and is located on the side of the push block that is close to the opening of the sliding groove.

6. The positioning structure for the telescopic extension of an umbrella rod according to claim 1, characterized in that: A positioning piece is fitted between the inner wall of the outer tube and the outer side of the inner tube. A through hole is opened on the side of the top end of the inner tube. A positioning groove is opened on one outer side of the connector. A positioning block is connected to one side of the positioning piece for pressing the connector against the inner wall of the inner tube relative to the other outer side. The positioning block passes through the through hole and is inserted into the positioning groove.

7. The positioning structure for the telescopic extension of an umbrella rod according to claim 6, characterized in that: The connector includes a positioning part and a connecting rod part. The bottom of the positioning part is connected to the top of the connecting rod part. The positioning part is located outside the top end of the inner tube, and its bottom end face abuts against the top end face of the inner tube. The connecting rod part is located inside the top end of the inner tube. The sliding groove is opened on one side of the positioning part. The inner wall of the outer tube fits against one side of the positioning part. The limiting groove is opened on the connecting rod part, and the positioning groove is opened on the other side of the connecting rod part.

8. The positioning structure for the telescopic extension of an umbrella rod according to claim 6, characterized in that: The connector is a connecting rod, which is detachably inserted into the top end of the inner tube. A round hole communicating with the sliding groove opening is provided on the side of the top end of the inner tube.

9. The positioning structure for the telescopic extension of an umbrella rod according to claim 6, characterized in that: The bottom end of the outer tube is detachably connected to a stop to prevent the positioning piece from sliding out of the outer tube.

10. The positioning structure for the telescopic extension of an umbrella rod according to claim 1, characterized in that: Both the push-pull rod and the connector are made of glass fiber or carbon fiber.

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