Telescopic pipe limiting structure

Abstract

The utility model discloses a telescopic pipe limiting structure contains upper pipe, upper pipe head, lower pipe and four limit parts. Upper pipe has four upper limit grooves, and upper limit groove is set up in the outer ring wall of upper pipe in extension, and is parallel to the center line axis of telescopic pipe limiting structure. The top end of upper pipe is connected with upper pipe head, and upper pipe head has an end face, which is quadrilateral and has diagonal lines. The lower pipe is movably sleeved on the upper pipe, and the lower pipe has four lower limit grooves, which are set up in the inner ring wall of the lower pipe in extension and are parallel to the center line axis, and the upper limit groove and the lower limit groove are opposite to each other to form four limit grooves. Four limit parts are accommodated in the limit groove. By setting a certain number of limit grooves and limit parts, the stability of the telescopic pipe limiting structure can be improved.

Description

Technical Field

[0001] This utility model relates to a telescopic tube structure, and more particularly to a telescopic tube limiting structure that can improve the smoothness of adjustment. Background Technology

[0002] Telescopic tubes are frequently used in bicycles and other devices with long tubular structures to adjust the length of the tube column. Conventional telescopic tubes require additional clamps for installation, and are typically locked from one side. This conventional installation method causes stress concentration on one side of the tube, leading to deformation and further pressure on the limiting components, resulting in sluggish operation.

[0003] Therefore, improving the smoothness of telescopic pipe adjustment has become the goal of relevant industry players. Utility Model Content

[0004] The purpose of this utility model is to provide a telescopic tube limiting structure with high smoothness of operation. By adjusting the position of the limiting structure, the telescopic tube limiting structure is not easily deformed by locking stress.

[0005] One embodiment of this utility model provides a telescopic tube limiting structure, comprising an upper tube, an upper tube head, a lower tube, and four limiting members. The upper tube has four upper limiting grooves extending from the outer annular wall of the upper tube and parallel to the central axis of the telescopic tube limiting structure. The upper tube head is connected to the top of the upper tube and has an end face that is quadrilateral with diagonals. The lower tube is movably fitted onto the upper tube and has four lower limiting grooves extending from the inner annular wall of the lower tube and parallel to the central axis. The upper and lower limiting grooves are aligned with each other to form four limiting grooves. The four limiting members are housed within the limiting grooves. Each limiting groove has a projection position on the end face of the upper tube head, and the four projection positions are respectively located at the four edges of the end face. Two of the four projection positions form a first connection, and the other two of the four projection positions form a second connection. The first and second connections are parallel and perpendicular to their respective diagonals.

[0006] According to the telescopic tube limiting structure of the aforementioned embodiment, the end face of the upper tube head can be rhomboid, and the rhomboid can have four rounded corners.

[0007] According to the telescopic tube limiting structure of the aforementioned embodiment, the length of each limiting member can be equal to the length of each upper limiting groove.

[0008] According to the telescopic tube limiting structure of the aforementioned embodiment, the four limiting members are all copper limiting members.

[0009] According to the telescopic tube limiting structure of the aforementioned embodiment, each limiting member may be cylindrical.

[0010] According to the telescopic tube limiting structure of the aforementioned embodiment, the lower tube may include a lower tube collar. The lower tube collar may be wrapped around one end of the lower tube, and the lower tube collar may be sleeved on the upper tube.

[0011] According to the telescopic tube limiting structure of the aforementioned embodiment, the distance between the first connection and the second connection can be 25% to 35% of the length of the diagonal.

[0012] According to the telescopic tube limiting structure of the aforementioned embodiment, the length of each lower limiting groove can be 75% to 85% of the length of the lower tube.

[0013] According to the telescopic tube limiting structure of the aforementioned embodiment, the upper limiting groove can be set at an equal angle to the outer ring wall of the upper tube, and the lower limiting groove can be set at an equal angle to the inner ring wall of the lower tube.

[0014] According to the telescopic tube limiting structure of the aforementioned embodiment, the end face of the upper tube head may have two engaging holes, located on opposite diagonals.

[0015] Accordingly, the telescopic tube limiting structure of this utility model, by adjusting the positions of the limiting groove and the limiting member, can reduce the deformation of the limiting groove and the limiting member due to locking stress when the telescopic tube limiting structure is locked, thus ensuring the smooth operation of the upper and lower tubes. Furthermore, by setting a specific number of limiting grooves and limiting members, the telescopic tube limiting structure of this utility model can further improve its stability. Attached Figure Description

[0016] Please refer to the attached diagram below.

[0017] Figure 1 An exploded view of the telescopic tube limiting structure according to an embodiment of the present invention is shown. Figure 2 Draw Figure 1 Side view of the telescopic tube limiting structure in the embodiment; Figure 3A Draw Figure 1 A side view of the lower tube of the telescopic tube limiting structure in the embodiment; Figure 3B Draw Figure 3A A schematic cross-sectional view of the lower pipe along section line BB in the embodiment; Figure 4 Draw Figure 1 A top view of the upper tube head of the telescopic tube limiting structure in the embodiment; Figure 5 Draw Figure 2A schematic cross-sectional view of the telescopic tube limiting structure of the embodiment along section line EE; and Figure 6 Draw Figure 3A A schematic cross-sectional view of the lower pipe along section line FF in the embodiment.

[0018] Explanation of icon numbers 100: Telescopic tube limiting structure 110: Top tube 110a: Top 111: Upper limit slot 120: Upper tube head 120a: End face 121: Engagement Hole 130: Lower pipe 131: Lower limit slot 132: Lower pipe collar 140: Limiting component 141: Limiting groove BB,EE,FF: Profile lines A: Centerline axis L1: Diagonal CL1: First Online Connection CL2: Second Online D1, D2, D3, D4, D5, D6, D7, D8: Length S: Distance R: radius Detailed Implementation

[0019] The embodiments of the present invention will be described below with reference to the accompanying drawings. For clarity, details of many embodiments will be described in the following description. However, it should be understood that these details are not intended to limit the scope of the present invention. That is, these details are not essential in the embodiments of the present invention. Furthermore, for the sake of simplicity, some conventional structures and components will be illustrated in a simple schematic manner in the drawings; and repeated components may be denoted by the same reference numerals.

[0020] Please see Figure 1 and Figure 2 , Figure 1 An exploded view of the telescopic tube limiting structure 100 according to one embodiment of the present invention is shown. Figure 2 Draw Figure 1 A side view of the telescopic tube limiting structure 100 in this embodiment. Figure 1 and Figure 2As shown, the telescopic tube limiting structure 100 includes an upper tube 110, an upper tube head 120, a lower tube 130, and four limiting members 140. The upper tube head 120 is connected to the upper tube 110, the lower tube 130 is sleeved on the upper tube 110, and the limiting members 140 are disposed between the upper tube 110 and the lower tube 130.

[0021] In detail, the upper tube 110 has four upper limit grooves 111, which extend to the outer ring wall of the upper tube 110 and are parallel to the center axis A of the telescopic tube limiting structure 100.

[0022] Please refer to the above as well. Figure 2 and Figure 4 , Figure 4 Draw Figure 1 This is a top view of the upper tube head 120 of the telescopic tube limiting structure 100 in this embodiment. The upper tube head 120 is connected to the top end 110a of the upper tube 110. The upper tube head 120 has an end face 120a, which is quadrilateral and has a diagonal L1. For example, the end face 120a of the upper tube head 120 can be rhomboid, and the rhomboid can have four rounded corners. This facilitates the connection of the telescopic tube limiting structure 100 with other components, and the shape of the end face 120a of the upper tube head 120 can be adjusted according to other components. Therefore, the content of this utility model is not limited.

[0023] Please refer to the above as well. Figure 2 , Figure 3A and Figure 3B , Figure 3A Draw Figure 1 A side view of the lower tube 130 of the telescopic tube limiting structure 100 in this embodiment. Figure 3B Draw Figure 3A The lower tube 130 of the embodiment is shown in a cross-sectional view along section line BB. The lower tube 130 is movably sleeved on the upper tube 110. The lower tube 130 has four lower limiting grooves 131, which extend into the inner annular wall of the lower tube 130 and are parallel to the centerline axis A. The upper limiting grooves 111 and the lower limiting grooves 131 are aligned with each other to form a shape as shown in the figure. Figure 4 The four limiting slots 141 shown.

[0024] like Figure 4 As shown, the limiting member 140 is housed within the limiting groove 141. Each limiting groove 141 has a projected position on the end face 120a of the upper tube head 120, and the four projected positions are respectively located at the four edges of the end face 120a of the upper tube head 120.

[0025] Please refer to the following: Figure 5 , Figure 5 Draw Figure 2The telescopic tube limiting structure 100 of the embodiment is shown in a cross-sectional view along section line EE. Two of the four projection positions form a first connection CL1, and the other two of the four projection positions form a second connection CL2. The first connection CL1 and the second connection CL2 are parallel, and the first connection CL1 and the second connection CL2 are perpendicular to the diagonal L1. In detail, the diagonal L1 is the connection between two opposite corners of the end face 120a. Two of the four projection positions can be two projection positions on both sides of the diagonal L1 adjacent to one of the two opposite corners, and the other two of the four projection positions can be two projection positions on both sides of the diagonal L1 adjacent to the other of the two opposite corners. Furthermore, when the end face 120a is rhomboid, the end face 120a can have a long diagonal and a short diagonal, and the diagonal L1 can be a long diagonal.

[0026] Therefore, when the telescopic tube limiting structure 100 is activated, the left and right swaying of the telescopic tube limiting structure 100 can be reduced, and the stability of the telescopic tube limiting structure 100 can be improved. The left and right swaying of the telescopic tube limiting structure 100 is reduced by the mutual alignment and engagement of the upper limiting groove 111, the lower limiting groove 131 and the limiting member 140.

[0027] Furthermore, by setting specific numbers and positions of the upper limit groove 111, lower limit groove 131, and limiting member 140, the stability of the telescopic tube limiting structure 100 can be improved. Therefore, when the telescopic tube limiting structure 100 is installed on other devices, even when using telescopic tube clamps, stress concentration that could cause deformation of the telescopic tube limiting structure 100 due to the clamps tightening it can be avoided.

[0028] Please refer to Figure 1 and Figure 2 The length D1 of the limiting member 140 and the length D2 of each upper limit groove 111 can be equal, which can help the upper limit groove 111 to be accommodated in the limiting member 140, making the limiting member 140 and the upper limit groove 111 more closely connected.

[0029] Furthermore, the limiting member 140 can be made of copper to improve its durability. Each limiting member 140 can be cylindrical, and the shapes of the limiting member 140, the upper limiting groove 111, and the lower limiting groove 131 must match each other. That is, the upper limiting groove 111 and the lower limiting groove 131 can be concave arc-shaped to improve the smoothness and stability of the upper tube 110 and the lower tube 130 during operation. However, the content of this utility model is not limited to the material and shape of the limiting member 140.

[0030] The lower pipe 130 may include a lower pipe collar 132, which may be encircled at one end of the lower pipe 130 and sleeved on the upper pipe 110. The lower pipe collar 132 helps to stabilize the sleeve relationship between the upper pipe 110 and the lower pipe 130 and improves the stability of the telescopic pipe limiting structure 100.

[0031] like Figure 2 As shown, the end face 120a of the upper tube head 120 and the upper tube 110 may be in a non-perpendicular state and have an inclined angle (not shown in the figure). This makes it more advantageous to install the telescopic tube limiting structure 100 on other devices, but the scope of this utility model is not limited thereto.

[0032] like Figure 4 As shown, the end face 120a of the upper tube head 120 may have two engaging holes 121, located on the diagonal L1 respectively. Through the engaging holes 121, other fasteners can be used to fix the telescopic tube limiting structure 100 to other devices.

[0033] like Figure 5 As shown, the distance S between the first connection CL1 and the second connection CL2 can be 25% to 35% of the length D3 of the diagonal L1. This improves the stability of the telescopic tube limiting structure 100.

[0034] The upper limit groove 111 can be set at an equal angle to the outer ring wall of the upper tube 110, and the lower limit groove 131 can be set at an equal angle to the inner ring wall of the lower tube 130. In this way, stress concentration can be avoided to prevent deformation of the telescopic tube limiting structure 100, thereby improving the stability of the telescopic tube limiting structure 100.

[0035] Furthermore, the length D4 of the first link CL1 can be equal to the length D5 of the second link CL2. This allows the telescopic tube limiting structure 100 to be subjected to even force, thereby improving the stability of the telescopic tube limiting structure 100, but the scope of this utility model is not limited thereto.

[0036] The length D6 of the end face 120a of the upper tube head 120 can be greater than the radius R of the lower tube 130. In this way, when the upper tube 110 descends into the lower tube 130, the lower tube 130 can abut against the upper tube head 120 to improve the stability of the telescopic tube limiting structure 100, but the content of this utility model is not limited thereto.

[0037] Please refer to Figure 6 , Figure 6 Draw Figure 3AA schematic cross-sectional view of the lower tube 130 along section line FF in the embodiment. The length D7 of the lower limiting groove 131 is 75% to 85% of the length D8 of the lower tube 130. By adjusting the length D7 of the lower limiting groove 131, when the upper tube 110 is fitted inside the lower tube 130 and the length of the telescopic tube limiting structure 100 is changed by moving up and down, the stability of the fitting relationship between the upper tube 110 and the lower tube 130 can still be maintained.

[0038] In summary, the telescopic tube limiting structure of this utility model achieves the effect of reducing lateral swaying by interlocking the upper and lower limiting grooves and limiting components. Furthermore, by setting specific numbers and positions of the upper and lower limiting grooves and limiting components, the stability of the telescopic tube limiting structure can be improved. Therefore, when the telescopic tube limiting structure is installed on other devices, even when using telescopic tube clamps, stress concentration that could cause deformation of the telescopic tube limiting structure due to the clamps tightening it can be avoided.

[0039] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A telescopic tube limiting structure, characterized in that, Include: The upper tube has four upper limit grooves, which extend to the outer ring wall of the upper tube and are parallel to the center axis of the telescopic tube limiting structure. The upper tube head is connected to the top end of the upper tube. The upper tube head has an end face, which is quadrilateral and has diagonals. A lower tube, movably fitted onto the upper tube, has four lower limiting grooves extending from the inner annular wall of the lower tube and parallel to the central axis. The four upper limiting grooves and the four lower limiting grooves are aligned with each other to form four limiting grooves. Four limiting components are housed within the four limiting grooves; Each of the limiting grooves has a projected position on the end face of the upper tube head, and the four projected positions are respectively located at the four edges of the end face; Two of the four projection positions form a first connection, and the other two of the four projection positions form a second connection. The first connection and the second connection are parallel, and the first connection and the second connection are perpendicular to the diagonal.

2. The telescopic tube limiting structure as described in claim 1, characterized in that, The end face of the upper tube head is rhomboid, and the rhomboid has four rounded corners.

3. The telescopic tube limiting structure as described in claim 1, characterized in that, The length of each of the limiting members is equal to the length of each of the upper limiting grooves.

4. The telescopic tube limiting structure as described in claim 1, characterized in that, The four limiting components are all copper limiting components.

5. The telescopic tube limiting structure as described in claim 1, characterized in that, Each of the aforementioned limiting components is cylindrical.

6. The telescopic tube limiting structure as described in claim 1, characterized in that, The lower tube includes: A lower tube collar is provided around one end of the lower tube, and the lower tube collar is sleeved on the upper tube.

7. The telescopic tube limiting structure as described in claim 1, characterized in that, The distance between the first connection and the second connection is 25% to 35% of the length of the diagonal.

8. The telescopic tube limiting structure as described in claim 1, characterized in that, The length of each of the lower limiting grooves is 75% to 85% of the length of the lower tube.

9. The telescopic tube limiting structure as described in claim 1, characterized in that, The four upper limit grooves are arranged at equal angles to the outer ring wall of the upper tube, and the four lower limit grooves are arranged at equal angles to the inner ring wall of the lower tube.

10. The telescopic tube limiting structure as described in claim 1, characterized in that, The end face of the upper tube head has two engaging holes, located on opposite diagonals.

Images