A telescopic tube

Abstract

This invention discloses a telescopic tube, comprising: an outer tube having an installation groove extending along its length and an anti-detachment groove connected to the side of the installation groove and extending circumferentially around the outer tube; and an inner tube having a first protrusion and a second protrusion protruding from its outer wall, both of which are capable of reciprocating along the length of the installation groove. The first protrusion is capable of rotating around the axis of the outer tube to be fixed in the installation groove. When the telescopic tube needs to extend, the inner tube extends relative to the outer tube. When the second protrusion moves to one side of the anti-detachment groove, the first protrusion rotates around the axis of the outer tube, and the second protrusion can enter the anti-detachment groove along the installation groove to restrict the relative telescopic movement of the inner and outer tubes. This restricts the relative movement of the inner and outer tubes in both the axial and circumferential directions, improves the support stability of the telescopic tube, and ensures the safety of photographic equipment. Moreover, the telescopic tube has a simple and ingenious structure, and the telescopic adjustment operation is convenient.

Description

Technical Field

[0001] This invention relates to the field of photographic equipment technology, and in particular to a telescopic tube. Background Technology

[0002] Selfie sticks, tripods, and other photography equipment are often mounted on telescopic tubes. In related technologies, a telescopic tube typically includes an inner tube 10 and an outer tube 20 sleeved outside the inner tube 10, as shown in the reference... Figure 5 and Figure 6 The inner tube 10 has a protrusion 11 on its outer wall, and the outer tube 20 has a bend 21 on its inner wall that matches the protrusion 11. When the inner tube 10 rotates relative to the outer tube 20 until the protrusion 11 and the bend 21 are misaligned, the outer wall of the inner tube 10 and the inner wall of the outer tube 20 are tightly fitted together, thereby achieving relative stability between the inner tube 10 and the outer tube 20.

[0003] Although the outer wall of the inner tube 10 and the inner wall of the outer tube 20 are restricted from relative rotation by a tight fit, when the inner tube 10 or the outer tube 20 is subjected to axial force, the inner tube 10 and the outer tube 20 are prone to relative expansion and contraction, resulting in unstable support for the photographic equipment, or even causing the photographic equipment to fall.

[0004] In addition, the distance from the center line of the outer tube 20 to the inner wall gradually decreases from the bend 21 in the clockwise direction. When the inner tube 10 rotates relative to the outer tube 20, the protrusion 11 fits tightly with the inner wall of the outer tube 20. When the inner tube 10 or the outer tube 20 is subjected to a small torque, it will loosen, thereby affecting the safety of the photographic equipment. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a telescopic tube that can prevent the inner tube and the outer tube from rotating relative to each other while restricting the relative telescopic movement of the inner tube and the outer tube.

[0006] According to an embodiment of the present invention, a telescopic tube includes: an outer tube, the inner wall of which is provided with an installation groove extending along the length direction of the outer tube and an anti-detachment groove communicating with the side of the installation groove and extending circumferentially around the outer tube; an inner tube, the outer wall of which is provided with a first protrusion and a second protrusion, both the first protrusion and the second protrusion being capable of reciprocating along the length direction of the installation groove, the first protrusion being capable of rotating around the axis of the outer tube to be fixed in the installation groove; when the first protrusion rotates around the axis of the outer tube, the second protrusion is capable of entering the anti-detachment groove along the installation groove to restrict the relative telescopic movement of the inner tube and the outer tube.

[0007] A telescopic tube according to an embodiment of the present invention has at least the following beneficial effects:

[0008] When the telescopic tube needs to be extended, the inner tube extends and moves relative to the outer tube. Both the first and second protrusions move along the mounting groove. When the second protrusion moves to one side of the anti-detachment groove, the inner and outer tubes rotate relative to each other. The first protrusion is fixed in the mounting groove to prevent the inner and outer tubes from rotating relative to each other. At the same time, the second protrusion enters the anti-detachment groove along the mounting groove to restrict the relative telescopic movement of the inner and outer tubes. This restricts the relative movement of the inner and outer tubes in the axial and circumferential directions, improves the support stability of the telescopic tube, and ensures the safety of photographic equipment. Moreover, the telescopic tube has a simple and ingenious structure, and the telescopic adjustment operation is convenient.

[0009] In some embodiments of the present invention, the mounting groove includes a guide groove extending along the length of the outer tube and a positioning groove communicating with the side of the guide groove. The anti-detachment groove is connected to the guide groove. The first protrusion and the second protrusion can slide back and forth along the guide groove. The first protrusion can enter the positioning groove from the guide groove to prevent the inner tube from rotating relative to the outer tube. At the same time, the second protrusion can enter the anti-detachment groove from the guide groove to restrict the inner tube from telescopically moving relative to the outer tube.

[0010] In some embodiments of the present invention, the depth of the positioning groove is less than the depth of the guide groove, and the first protrusion can be tightly fitted with the bottom of the positioning groove.

[0011] In some embodiments of the present invention, the positioning groove and the guide groove are connected by a raised arc-shaped slope.

[0012] In some embodiments of the present invention, the inner tube is fitted with an arc plate located on the outer surface of the inner tube, and both the first protrusion and the second protrusion are disposed on the arc plate.

[0013] In some embodiments of the present invention, the inner tube is provided with a plurality of first slots circumferentially on its wall, and the number of the arc plate, the mounting groove and the first slots are the same. The arc plate is provided with a first snap-fit ​​portion that is embedded in the first slot.

[0014] In some embodiments of the present invention, the first protrusion and the second protrusion are arranged side by side, and the second protrusion is closer to the anti-detachment groove than the first protrusion. The width of the whole formed by the first protrusion and the second protrusion is consistent with the width of the guide groove.

[0015] In some embodiments of the present invention, the second protrusion extends along the length direction of the outer tube at the same dimension as the anti-detachment groove extends along the length direction of the outer tube, so as to prevent the inner tube and the outer tube from moving relative to each other.

[0016] In some embodiments of the present invention, the end of the outer tube is provided with an anti-detachment member that can abut against the first protrusion or the second protrusion.

[0017] In some embodiments of the present invention, the inner peripheral wall of the end of the outer tube is provided with a second groove, the anti-disengagement member is an open ring that is engaged in the second groove, the open ring protrudes radially along the outer tube, and the open ring is provided with a second engaging portion that matches the mounting groove.

[0018] Additional aspects and advantages of the 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

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a structural diagram of one embodiment of the telescopic tube of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the structural breakdown of the embodiment;

[0022] Figure 3 for Figure 1 A schematic cross-sectional view of the inner and outer tubes in the embodiment when they can freely expand and contract;

[0023] Figure 4 for Figure 1 A cross-sectional schematic diagram of the inner and outer tubes in the embodiment when they are relatively fixed;

[0024] Figure 5 This is a schematic diagram of the structure of a traditional telescopic tube when the inner and outer tubes can extend and retract freely;

[0025] Figure 6 This is a schematic diagram of the structure of a traditional telescopic tube when the inner and outer tubes are relatively fixed. Detailed Implementation

[0026] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0027] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention 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 invention.

[0029] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 4 An embodiment of the present invention provides a telescopic tube, comprising: an outer tube 100, the inner wall of which is provided with an installation groove 110 extending along the length direction of the outer tube 100 and an anti-detachment groove 120 connected to the side of the installation groove 110 and extending around the circumference of the outer tube 100; and an inner tube 200, the outer wall of which is provided with a first protrusion 310 and a second protrusion 320. Both the first protrusion 310 and the second protrusion 320 are capable of reciprocating along the length direction of the installation groove 110. The first protrusion 310 is capable of rotating around the axis of the outer tube 100 to be fixed in the installation groove 110. When the first protrusion 310 rotates around the axis of the outer tube 100, the second protrusion 320 can enter the anti-detachment groove 120 along the installation groove 110 to restrict the relative telescopic movement of the inner tube 200 and the outer tube 100.

[0031] When the telescopic tube needs to be extended, the inner tube 200 extends relative to the outer tube 100, and both the first protrusion 310 and the second protrusion 320 move along the mounting groove 110. When the second protrusion 320 moves to one side of the anti-detachment groove 120, the inner tube 200 and the outer tube 100 rotate relative to each other. The first protrusion 310 is fixed in the mounting groove 110 to prevent the inner tube 200 and the outer tube 100 from rotating relative to each other. At the same time, the second protrusion 320 enters the anti-detachment groove 120 along the mounting groove 110 to restrict the relative telescopic movement of the inner tube 200 and the outer tube 100, thereby restricting the inner tube 200 and the outer tube 100 in the axial and circumferential directions. The relative movement of the outer tube 100 improves the support stability of the telescopic tube and ensures the safety of photographic equipment. When the telescopic tube needs to be shortened, the inner tube 200 and the outer tube 100 are rotated. The first protrusion 310 rotates along the circumference of the outer tube 100 and is no longer fixed in the mounting groove 110. The second protrusion 320 enters the mounting groove 110 along the anti-detachment groove 120. At this time, the first protrusion 310 and the second protrusion 320 can move together along the length direction of the mounting groove 110 so that the inner tube 200 is partially retracted inside the outer tube 100. The structure of the telescopic tube is simple and ingenious, and the telescopic adjustment operation is convenient.

[0032] See Figure 2 , Figure 3 and Figure 4 In some embodiments of the present invention, the mounting groove 110 includes a guide groove 111 extending along the length of the outer tube 100 and a positioning groove 112 communicating with the side of the guide groove 111. An anti-detachment groove 120 communicates with the guide groove 111. The first protrusion 310 and the second protrusion 320 can reciprocate along the guide groove 111. The first protrusion 310 can enter the positioning groove 112 from the guide groove 111 to prevent the inner tube 200 from rotating relative to the outer tube 100. Simultaneously, the second protrusion 320 can enter the anti-detachment groove 120 from the guide groove 111 to restrict the telescopic movement of the inner tube 200 relative to the outer tube 100. It should be noted that when the first protrusion 310 and the second protrusion 320 are located in the guide groove 111, both the first protrusion 310 and the second protrusion 320 can slide freely along the guide groove 111, thereby allowing the inner tube 200 to telescopically move relative to the outer tube 100. When the first protrusion 310 enters the positioning groove 112 and restricts the rotation of the inner tube 200 relative to the outer tube 100, the second protrusion 320 is located in the anti-detachment groove 120, thereby restricting the telescopic movement of the inner tube 200 relative to the outer tube 100. Only when the first protrusion 310 returns to the guide groove 111 can the second protrusion 320 leave the anti-detachment groove 120 and return to the guide groove 111, thereby realizing the telescopic adjustment between the inner tube 200 and the outer tube 100.

[0033] Additionally, it should be noted that in some other embodiments, based on the second protrusion 220 and the anti-detachment groove 120, the circumferential direction limitation method of the inner tube 200 and the outer tube 100 can adopt the traditional method. Figure 5 and Figure 6 The structure shown is as follows.

[0034] See Figure 2 and Figure 3 In some embodiments of the present invention, to avoid radial displacement between the inner tube 200 and the outer tube 100, further improve the support stability of the telescopic tube during extension, and ensure the safety of photographic equipment, the depth of the positioning groove 112 is less than the depth of the guide groove 111, and the first protrusion 310 can be tightly fitted with the bottom of the positioning groove 112. When the first protrusion 310 and the second protrusion 320 are located within the guide groove 111, neither the first protrusion 310 nor the second protrusion 320 will press against the bottom of the guide groove 111, allowing both the first protrusion 310 and the second protrusion 320 to slide freely in the guide groove 111. When the inner tube 200 and the outer tube 100 rotate relative to each other to allow the first protrusion 310 to enter the positioning groove 112, the first protrusion 310 is tightly fitted with the bottom of the positioning groove 112, preventing the inner tube 200 and the outer tube 100 from loosening.

[0035] See Figure 2 , Figure 3 and Figure 4 In some embodiments of the present invention, in order to enable the first protrusion 310 to smoothly switch positions between the guide groove 111 and the positioning groove 112, and to enable the first protrusion 310 to be elastically locked in the positioning groove 112, the positioning groove 112 and the guide groove 111 are connected by the protruding arc-shaped slope 113.

[0036] In some embodiments of the present invention, an arc plate 300 is mounted on the outer surface of the inner tube 200, and the first protrusion 310 and the second protrusion 320 are both disposed on the arc plate 300. It is understood that the arc plate 300 and the inner circumferential wall of the outer tube 100 are in close contact to provide rotational and telescopic guidance. Furthermore, the separate arrangement of the arc plate 300 and the inner tube 200 facilitates the processing and forming of the first protrusion 310 and the second protrusion 320, makes it easier to control the dimensional accuracy of the first protrusion 310 and the second protrusion 320, and reduces the difficulty of production and processing.

[0037] See Figure 2 In some embodiments of the present invention, the inner tube 200 has a plurality of first slots 210 circumferentially arranged on its wall. The number of arc plates 300, mounting grooves 110 and first slots 210 are consistent. The arc plates 300 are provided with first engaging portions 330 that are fitted into the first slots 210. The first engaging portions 330 and the first slots 210 combine to achieve convenient assembly between the arc plates 300 and the inner tube 200. The arrangement of multiple arc plates 300 and mounting grooves 110 helps to improve the reliability of the telescopic adjustment between the inner tube 200 and the outer tube 100 and increases the service life of the telescopic tube.

[0038] See Figure 3 In some embodiments of the present invention, the first protrusion 310 and the second protrusion 320 are arranged side by side, with the second protrusion 320 closer to the anti-detachment groove 120 than the first protrusion 310. The width of the entire structure formed by the first protrusion 310 and the second protrusion 320 is consistent with the width of the guide groove 111. Because the second protrusion 320 is closer to the anti-detachment groove 120 than the first protrusion 310, when the inner tube 200 rotates relative to the outer tube 100 to fix the angular position between them, the second protrusion 320 enters the anti-detachment groove 120, while the first protrusion 310 remains outside the anti-detachment groove 120. The consistency between the width of the entire structure formed by the first protrusion 310 and the second protrusion 320 and the width of the guide groove 111 ensures that the inner tube 200 does not move relative to the outer tube 100 during telescopic movement, thus preventing jamming.

[0039] See Figure 2 In some embodiments of the present invention, the dimension of the second protrusion 320 extending along the length direction of the outer tube 100 is consistent with the dimension of the anti-detachment groove 120 extending along the length direction of the outer tube 100, so as to prevent the inner tube 200 and the outer tube 100 from moving relative to each other. The consistency between the dimension of the second protrusion 320 extending along the length direction of the outer tube 100 and the dimension of the anti-detachment groove 120 extending along the length direction of the outer tube 100 ensures that the length of the telescopic tube is fixed in the extended state, and it can withstand axial tension and axial compression forces. It should be noted that in some other embodiments, the dimension of the anti-detachment groove 120 extending along the length direction of the outer tube 100 may be slightly larger than the dimension of the second protrusion 320 extending along the length direction of the outer tube 100. In this case, the inner tube 200 can have a smaller axial displacement relative to the outer tube 100. When the telescopic tube is subjected to axial external force, the second protrusion 320 abuts against the end of the anti-detachment groove 120 along the length direction of the outer tube 100.

[0040] See Figure 1 and Figure 2 In some embodiments of the present invention, in order to prevent the inner tube 200 and the outer tube 100 from separating axially, the end of the outer tube 100 is provided with a non-detachment member 400 that can abut against the first protrusion 310 or the second protrusion 320.

[0041] See Figure 2In some embodiments of the present invention, the inner peripheral wall of the end of the outer tube 100 is provided with a second retaining groove 130, and the anti-detachment member 400 is an open ring that is engaged in the second retaining groove 130. The open ring protrudes radially along the outer tube 100, and the open ring is provided with a second engaging portion 410 that matches the mounting groove 110. It should be noted that the open ring is made of plastic or metal and has a certain degree of elasticity. During assembly, the open ring is pinched to make the opening of the open ring converge inward, and then the open ring is inserted into the outer tube 100 and released. The open ring restores its elastic deformation and is engaged in the second retaining groove 130. The second engaging portion 410 engages with the end of the mounting groove 110 to limit the opening ring and prevent the opening from rotating around the second retaining groove 130. The above structure facilitates the installation of the anti-detachment member 400 and simplifies the production process.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] Although embodiments of the 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A telescopic tube, characterized in that, include: The outer tube (100) has an inner wall provided with an installation groove (110) extending along the length of the outer tube (100) and an anti-detachment groove (120) connected to the side of the installation groove (110) and extending around the circumference of the outer tube (100). The inner tube (200) has a first protrusion (310) and a second protrusion (320) protruding from its outer wall. Both the first protrusion (310) and the second protrusion (320) can reciprocate along the length of the mounting groove (110). The first protrusion (310) can rotate around the axis of the outer tube (100) to be fixed in the mounting groove (110). When the first protrusion (310) rotates about the axis of the outer tube (100), the second protrusion (320) can enter the anti-detachment groove (120) along the mounting groove (110) to restrict the relative telescopic movement of the inner tube (200) and the outer tube (100); the mounting groove (110) includes a guide groove (111) extending along the length direction of the outer tube (100) and a positioning groove (112) communicating with the side of the guide groove (111); the anti-detachment groove (120) and the guide groove (111) are connected, and the first protrusion (310) and the second protrusion (320) can slide back and forth along the guide groove (111). The first protrusion (310) can enter the positioning groove (112) from the guide groove (111) to prevent the inner tube (200) from rotating relative to the outer tube (100). At the same time, the second protrusion (320) can enter the anti-detachment groove (120) from the guide groove (111) to restrict the inner tube (200) from extending and retracting relative to the outer tube (100).

2. The telescopic tube according to claim 1, characterized in that: The depth of the positioning groove (112) is less than the depth of the guide groove (111), and the first protrusion (310) can fit tightly with the bottom of the positioning groove (112).

3. A telescopic tube according to claim 1 or 2, characterized in that: The positioning groove (112) and the guide groove (111) are connected by a raised arc-shaped slope (113).

4. A telescopic tube according to claim 1, characterized in that: The inner tube (200) is equipped with an arc plate (300) located on the outer surface of the inner tube (200), and the first protrusion (310) and the second protrusion (320) are both disposed on the arc plate (300).

5. A telescopic tube according to claim 4, characterized in that: The inner tube (200) has a plurality of first slots (210) circumferentially arranged on its wall. The number of the arc plate (300), the mounting groove (110) and the first slots (210) are the same. The arc plate (300) is provided with a first snap-fit ​​part (330) embedded in the first slot (210).

6. A telescopic tube according to claim 1, characterized in that: The first protrusion (310) and the second protrusion (320) are arranged side by side, and the second protrusion (320) is closer to the anti-detachment groove (120) than the first protrusion (310). The width of the whole formed by the first protrusion (310) and the second protrusion (320) is consistent with the width of the guide groove (111).

7. A telescopic tube according to claim 1, characterized in that: The second protrusion (320) extends along the length of the outer tube (100) to the same dimension as the anti-detachment groove (120) extends along the length of the outer tube (100) to prevent the inner tube (200) and the outer tube (100) from moving relative to each other.

8. A telescopic tube according to claim 1, characterized in that: The end of the outer tube (100) is provided with a locking member (400) that can abut against the first protrusion (310) or the second protrusion (320).

9. A telescopic tube according to claim 8, characterized in that: The inner circumferential wall of the end of the outer tube (100) is provided with a second groove (130). The anti-detachment member (400) is an open ring that is engaged in the second groove (130). The open ring protrudes radially along the outer tube (100). The open ring is provided with a second engaging part (410) that matches the mounting groove (110).

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