A multi-stage telescopic support leg tube

Abstract

The application provides a multi-stage telescopic supporting leg pipe, which comprises a pipe leg base, a leg pad and multi-stage leg pipes, a multi-stage square pipe is arranged in the multi-stage leg pipes, two axial reinforcing ribs are arranged on the inner wall of each stage of the leg pipes, the upper end of the first stage of the leg pipes is installed on the lower part of the pipe leg base and can rotate circumferentially relative to the pipe leg base, the upper end of the first stage of the square pipe is fixedly installed on the lower part of the pipe leg base, the lower end of the last stage of the leg pipes is installed on the leg pad and can rotate circumferentially relative to the leg pad, the lower end of the last stage of the square pipe is fixedly installed on the leg pad, and a rotating locking mechanism which can move axially is installed in each stage of the leg pipes except the last stage of the leg pipes, the rotating locking mechanism comprises an intermediate body and a peripheral body which can rotate relative to each other, the intermediate body is sleeved on the end part of the next stage of the square pipe and is fixed, the lower part of the peripheral body is fixedly connected with the next stage of the leg pipes, and the outer periphery of the upper part of the peripheral body is provided with a groove or a notch which is matched with the reinforcing ribs. The multi-stage leg pipes can be locked synchronously or released synchronously.

Description

Technical Field

[0001] This invention relates to the field of photographic equipment technology, and more specifically to a multi-stage telescopic support leg tube. Background Technology

[0002] In photography and videography, tripods, quadrupeds, or monopods are typically used to support the equipment. To make the height of these tripods, quadrupeds, or monopods adjustable, current technology generally designs the support legs as three, four, or even more nested sections, thus achieving a telescopic function. However, in current technology, when it is necessary to fix the height of the support legs, multiple locking mechanisms must be tightened one by one to lock each section of the leg. This operation is cumbersome and time-consuming. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-level telescopic support tube that allows multiple levels of the tube to lock or release simultaneously.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a multi-stage telescopic support tube, the support tube comprising a tube base, a foot pad, and a multi-stage tube nested in sequence, wherein a multi-stage square tube nested in sequence is inserted within the multi-stage tube, and the inner wall of each stage tube is provided with two symmetrical reinforcing ribs parallel to the axis; the upper end of the first stage tube is mounted on the lower part of the tube base and can rotate circumferentially relative to the tube base, and the upper end of the first stage square tube is fixedly mounted on the lower part of the tube base; the lower end of the last stage tube is mounted on the foot pad and can rotate circumferentially relative to the foot pad, and the lower end of the last stage square tube is fixedly mounted on the foot pad; except for the last stage tube, each stage... Each leg tube is equipped with an axially movable rotary locking mechanism. The rotary locking mechanism includes an intermediate body and an outer body that can rotate relative to each other. The intermediate body and the outer body switch between clearance fit and tight fit states as the angle between them changes. The intermediate body is fitted onto the end of the next-level square tube through a rectangular through hole and fixed thereon. The lower part of the outer body is embedded into the end of the next-level leg tube and fixed thereon. The outer diameter of the upper part of the outer body is larger than the outer diameter of the leg tube to which it is fixed. The outer circumferential surface of the upper part of the outer body is provided with a groove or notch that matches the reinforcing rib. Except for the last level leg tube, the lower outer circumference of each level leg tube is equipped with a leg tube closing piece to prevent the next level leg tube from coming off.

[0005] The working principle and usage method of the above technical solution are as follows: 1) Since the intermediate body and the outer body of the rotary locking mechanism switch between clearance fit and tight fit states as the angle between them changes, the intermediate body is fitted onto the end of the next-level square tube through a rectangular through hole and fixed thereon, while the outer circumferential surface of the upper part of the outer body is provided with a groove or notch that matches the reinforcing rib. In addition, the lower part of the outer body is fixedly connected to the next-level foot tube. Therefore, as long as any level foot tube is held and rotated relative to the foot seat and the square tube, all the foot tubes can be driven to rotate synchronously through the cooperation of the reinforcing rib and the outer body. 1) Lock or release all the rotary locking mechanisms; 2) When all the rotary locking mechanisms are released, lift the support leg tubes, and the multi-stage leg tubes will extend downwards simultaneously under their own weight; 3) Hold any one stage leg tube and rotate it relative to the tube base and square tube, causing all the leg tubes to rotate synchronously, locking all the rotary locking mechanisms, thus allowing the multi-stage leg tubes to lock synchronously; 4) Hold any one stage leg tube and rotate it in the opposite direction relative to the tube base and square tube, causing all the leg tubes to rotate synchronously, releasing all the rotary locking mechanisms, thus allowing the multi-stage leg tubes to release synchronously.

[0006] In one embodiment, the rotary locking mechanism includes an intermediate body and an outer body. The outer body includes a base, a tapered component, and a movable block fitted onto the intermediate body. The intermediate body has an axial rectangular through hole. The outer periphery of the intermediate body is cylindrical, and a disc in the middle of the outer periphery divides the intermediate body into an upper section and a lower section. The upper section has an external thread. The tapered component has a threaded through hole and is installed on the upper section of the intermediate body through the threaded through hole. The movable block is a split structure, consisting of two parts, left and right, that wrap around the tapered surface of the upper part of the tapered component. An upper retaining spring is provided at the upper end of the intermediate body. The base is a cylindrical structure with a boss at one end. The base is fitted onto the lower section of the intermediate body with the boss facing upwards and is limited by a lower retaining spring. The outer periphery of the tapered component and the boss of the base has grooves that cooperate with reinforcing ribs. The lower end of the base is fixedly connected to the upper end of the next-stage foot tube.

[0007] Furthermore, a compression spring is installed between the movable block and the upper retaining spring, and the outer peripheral surface of the movable block is provided with a groove that cooperates with the reinforcing rib.

[0008] In one embodiment, the rotary locking mechanism includes an intermediate body and an outer body. The outer body includes a base and a movable block fitted onto the intermediate body. The intermediate body is T-shaped and includes a disc portion, an elliptical portion, and a cylindrical portion from top to bottom, and has an axial rectangular through hole. The base is a cylindrical structure with a boss at one end. The base is fitted onto the cylindrical portion of the intermediate body with the boss facing upward and is limited by a lower retaining spring. The movable block is a split structure, consisting of two parts, left and right, installed between the base boss and the disc portion of the intermediate body and enclosing the elliptical portion of the intermediate body. The diameter of the base boss is larger than the diameter of the disc portion of the intermediate body, and the outer circumferential surface of the base boss has a groove or notch that matches the reinforcing rib. The lower end of the base is fixedly connected to the upper end of the next-level foot tube.

[0009] Furthermore, the lower end face of the movable block is provided with a guide strip, and the upper surface of the base boss is provided with a guide groove that cooperates with the guide strip.

[0010] In one embodiment, except for the last stage of square tube, a limit plug is installed at the lower end of each stage of square tube.

[0011] In one embodiment, the upper end of the first-stage tube is mounted on the lower part of the tube seat via a connecting nut, and the first-stage tube can rotate circumferentially relative to the tube seat.

[0012] In one embodiment, a base is installed at the upper end of the first-stage tube, and a connector for fixing the first-stage square tube and the tube base is installed in the through hole of the base; a base is installed at the lower end of the last-stage tube, and a T-shaped sleeve with an outer circle and an inner square is installed between the base and the last-stage square tube.

[0013] The beneficial effects of this invention are: by setting up a clever mechanical structure for coordinated linkage, this invention can enable multi-stage leg tubes of no less than three stages to lock or release synchronously, which greatly improves the convenience of operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the support leg tube in Embodiments 1 and 2 of the present invention;

[0015] Figure 2 This is a partial cross-sectional view of the support leg tube in Embodiment 1 of the present invention;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the intermediate body in Embodiment 1 of the present invention;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the tapered component in Embodiment 1 of the present invention;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the movable block in Embodiment 1 of the present invention;

[0019] Figure 6 These are schematic diagrams of the cross-sectional structure of the base in Embodiments 1 and 2 of the present invention;

[0020] Figure 7 This is a partial cross-sectional view of the support leg tube in Embodiment 2 of the present invention;

[0021] Figure 8 This is a schematic diagram of the cross-sectional structure of the intermediate body in Embodiment 2 of the present invention;

[0022] Figure 9 for Figure 8 A schematic diagram of the cross-sectional structure viewed from below;

[0023] Figure 10 This is a schematic diagram of the cross-sectional structure of the movable block in Embodiment 2 of the present invention;

[0024] Figure 11 This is a schematic diagram of another cross-sectional structure of the base in Embodiment 2 of the present invention;

[0025] The attached figures are labeled as follows:

[0026] 10 - Pin base 11 - First-stage pin

[0027] 12 - Second-stage leg tube; 13 - Third-stage leg tube

[0028] 20 - Foot pad; 21 - First-level square tube

[0029] 22 – Second-level square tube; 23 – Third-level square tube

[0030] 30 - Rotary locking mechanism; 31 - Intermediate body

[0031] 32—Base; 33—Conical component

[0032] 34 – Movable block; 40 – Leg tube end cap.

[0033] 50 – Connecting nut; 60 – Connecting piece

[0034] 70 - T-shaped sleeve. Detailed Implementation

[0035] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0037] In the description of this invention, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the terms according to the specific circumstances. Example 1

[0038] like Figures 1 to 6 As shown, a multi-stage telescopic support tube includes a tube base 10, a foot pad 20, and three nested tubes. The three-stage tubes include a first-stage tube 11, a second-stage tube 12, and a third-stage tube 13 with progressively decreasing diameters from top to bottom. Each stage of the tube has two symmetrical reinforcing ribs on its inner wall that are parallel to the axis (see the dotted lines in the figure). A three-stage square tube, nested within the three-stage tubes, is inserted. The three-stage square tubes include a first-stage square tube 21, a second-stage square tube 22, and a third-stage square tube 23 with progressively increasing diameters from top to bottom. The upper end of the first-stage tube 11 is mounted on the lower part of the tube base 10 via a connecting nut 50. The first-stage tube can rotate circumferentially relative to the tube base 10. The upper end of the first-stage square tube 21 is fixedly mounted on the lower part of the tube base 10. The lower end of the third-stage tube 23 is mounted on the foot pad 20 and can rotate relative to the foot pad 20. The foot pad 20 rotates circumferentially, and the lower end of the third-level square tube 23 is fixedly installed on the foot pad 20. Except for the third-level foot tube 23, each level foot tube is equipped with an axially movable rotary locking mechanism 30. The rotary locking mechanism 30 includes an intermediate body 31 and an outer body that can rotate relative to each other. The intermediate body 31 and the outer body can switch between clearance fit and tight fit states as the angle between them changes. The intermediate body 31 is fitted onto the end of the next level square tube through a rectangular through hole and fixed. The lower part of the outer body is embedded into the end of the next level foot tube and fixed. The outer diameter of the upper part of the outer body is larger than the outer diameter of the foot tube to which it is fixed. The outer peripheral surface of the upper part of the outer body is provided with a groove or notch that matches the reinforcing rib. Except for the third-level foot tube 13, each level foot tube is equipped with a foot tube closing part 40 at the lower outer periphery to prevent the next level foot tube from falling out.

[0039] like Figures 2 to 6As shown, the rotary locking mechanism 30 in this embodiment includes an intermediate body 31 and an outer body. The outer body includes a base 32, a tapered member 33, and a movable block 34, all fitted onto the intermediate body 31. The intermediate body 31 has an axial rectangular through hole. The outer periphery of the intermediate body 31 is cylindrical, and a disc is provided in the middle of the outer periphery to divide the intermediate body 31 into an upper section and a lower section. The upper section has an external thread, and the tapered member 33 has a threaded through hole and is installed on the upper section of the intermediate body 31 through the threaded through hole. The movable block 34 has a split structure, divided into left and right sections. Two conical surfaces are wrapped around the upper part of the conical part 33. An upper retaining spring is provided at the upper end of the intermediate body 31. The base 32 is a cylindrical structure with a boss at one end. The base 32 is fitted onto the lower part of the intermediate body 31 with the boss facing upward and is limited by the lower retaining spring. The outer peripheral surfaces of the boss of the conical part 33 and the base 32 are provided with grooves that cooperate with the reinforcing ribs. The lower end of the base 32 is fixedly connected to the upper end of the next-level foot tube. A compression spring is installed between the movable block 34 and the upper retaining spring. The outer peripheral surface of the movable block 34 is provided with grooves that cooperate with the reinforcing ribs.

[0040] like Figure 1 As shown, except for the third-level square tube 23, each level of square tube has a limit plug installed at its lower end.

[0041] like Figure 1 As shown, a base 32 is installed at the upper end of the first-stage tube 11, and a connector 60 for fixing the first-stage square tube 21 and the tube seat 10 is installed in the through hole of the base 32; a base 32 is installed at the lower end of the third-stage tube 13, and a T-shaped sleeve 70 with an outer circle and an inner square is installed between the base 32 and the third-stage square tube 23.

[0042] The working principle and usage method of this embodiment are as follows: 1) Since the intermediate body 31 and the outer periphery of the rotary locking mechanism 30 switch between clearance fit and tight fit states as the angle between them changes, the intermediate body 31 is fitted onto the end of the next-level square tube through a rectangular through hole and fixed thereon. The outer periphery of the upper part of the outer periphery is provided with a groove or notch that matches the reinforcing rib. In addition, the lower part of the outer periphery is fixedly connected to the next-level foot tube. Therefore, as long as any level foot tube is held and rotated relative to the foot seat 10 and the square tube, all the foot tubes can be driven to rotate synchronously through the cooperation of the reinforcing rib and the outer periphery. 1) Lock or release all the rotary locking mechanisms 30; 2) When all the rotary locking mechanisms 30 are in the released state, lift up the support leg tubes, and the multi-stage leg tubes will extend downwards simultaneously under their own weight; 3) Hold any one stage leg tube and rotate it relative to the tube base 10 and the square tube, causing all the leg tubes to rotate synchronously, so that all the rotary locking mechanisms 30 are locked, thereby allowing the multi-stage leg tubes to be locked synchronously; 4) Hold any one stage leg tube and rotate it in the opposite direction relative to the tube base 10 and the square tube, so that all the leg tubes rotate synchronously, so that all the rotary locking mechanisms 30 are released, thereby allowing the multi-stage leg tubes to be released synchronously. Example 2

[0043] like Figure 1 As shown, the overall structure of the support leg tube provided in this embodiment is basically the same as that in Embodiment 1, the only difference being the structure of the rotating locking mechanism. Figures 6 to 11 As shown, the rotary locking mechanism 30 in this embodiment includes an intermediate body 31 and an outer body. The outer body includes a base 32 and a movable block 34 fitted onto the intermediate body 31. The intermediate body 31 is T-shaped and includes a disc portion, an elliptical portion, and a cylindrical portion from top to bottom, and has an axial rectangular through hole. The base 32 is a cylindrical structure with a boss at one end. The base 32 is fitted onto the cylindrical portion of the intermediate body 31 with the boss facing upward and is limited by a lower retaining spring. The movable block 34 is a split structure, consisting of two parts, left and right, installed between the boss of the base 32 and the disc portion of the intermediate body 31 and enclosing the elliptical portion of the intermediate body 31. The diameter of the boss of the base 32 is larger than the diameter of the disc portion of the intermediate body 31, and the outer circumferential surface of the boss of the base 32 has a groove or notch that matches the reinforcing rib. The lower end of the base 32 is fixedly connected to the upper end of the next-level foot tube.

[0044] like Figure 10 , 11 As shown, in order to prevent the movable block 34 from shifting, a guide bar 34a is provided on the lower end face of the movable block 34, and a guide groove 32a that cooperates with the guide bar is provided on the upper surface of the boss of the base 32.

[0045] The working principle and usage method of this embodiment are the same as those of Embodiment 1.

[0046] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

[0047] To facilitate understanding by those skilled in the art of the improvements of this invention over the prior art, some of the accompanying drawings and descriptions have been simplified, and for clarity, some other elements have been omitted from this application. Those skilled in the art should realize that these omitted elements may also constitute the content of this invention.

Claims

1. A multi-stage telescoping support leg tube, characterized by: The support foot pipe comprises a foot pipe base (10), a foot pad (20), and a plurality of levels of foot pipes connected in sequence, a plurality of levels of square pipes connected in sequence are arranged in the plurality of levels of foot pipes, the pipe diameter of the plurality of levels of foot pipes decreases gradually from top to bottom, the pipe diameter of the plurality of levels of square pipes increases gradually from top to bottom, the inner wall of each level of foot pipe is provided with two symmetrical and parallel reinforcing ribs; the upper end of the first level of foot pipe (11) is installed on the lower part of the foot pipe base (10) and can rotate circumferentially relative to the foot pipe base (10), the upper end of the first level of square pipe (21) is fixedly installed on the lower part of the foot pipe base (10); the lower end of the last level of foot pipe is installed on the foot pad (20) and can rotate circumferentially relative to the foot pad (20), the lower end of the last level of square pipe is fixedly installed on the foot pad (20); in addition to the last level of foot pipe, an axially movable rotating locking mechanism (30) is installed in each level of foot pipe, the rotating locking mechanism (30) comprises an intermediate body (31) and a peripheral body which can rotate relative to each other, the intermediate body (31) and the peripheral body are switched between gap cooperation and tight cooperation with the change of the angle between the two, the intermediate body (31) is sleeved on the end of the next level of square pipe through a rectangular through hole and is fixed, the lower part of the peripheral body is embedded into the end of the next level of foot pipe and is fixed, the outer diameter of the upper part of the peripheral body is greater than the outer diameter of the foot pipe fixed thereto, and the outer periphery of the upper part of the peripheral body is provided with a groove or notch matched with the reinforcing rib; in addition to the last level of foot pipe, a foot pipe closing member (40) which can prevent the next level of foot pipe from being pulled out is installed on the lower periphery of each level of foot pipe; the rotating locking mechanism (30) comprises an intermediate body (31) and a peripheral body, the peripheral body comprises a base (32) sleeved on the intermediate body (31), a tapered member (33), and a movable block (34), the intermediate body (31) is provided with an axial rectangular through hole, the outer periphery of the intermediate body (31) is cylindrical, the middle part of the outer periphery is provided with a disc to divide the intermediate body into an upper segment and a lower segment, the upper segment is provided with external threads, the tapered member (33) is provided with a threaded through hole and is installed on the upper segment of the intermediate body (31) through the threaded through hole, the movable block (34) is a split structure, is split into left and right blocks and is wrapped on the tapered surface of the upper part of the tapered member (33), an upper snap spring is arranged at the upper end of the intermediate body (31), the base (32) is a cylindrical structure with a boss at one end, the base (32) is sleeved on the lower segment of the intermediate body (31) with the boss facing upwards and is limited by a lower snap spring; the outer periphery of the boss of the tapered member (33) and the base (32) is provided with a groove matched with the reinforcing rib; the lower end of the base (32) is fixedly connected with the upper end of the next level of foot pipe; the outer periphery of the movable block (34) is provided with a groove matched with the reinforcing rib; or, the rotating locking mechanism (30) comprises an intermediate body (31) and a peripheral body, the peripheral body comprises a base (32) and a movable block (34) sleeved on the intermediate body (31); the intermediate body (31) is T-shaped, comprises a disc part, an oval part, and a cylindrical part from top to bottom in sequence, and is provided with an axial rectangular through hole;The base (32) is a cylinder structure with a boss at one end, the base (32) is sleeved on the cylindrical part of the intermediate body (31) with the boss upward and is limited by a lower clasp; the movable block (34) is a split structure, is installed between the boss of the base (32) and the disc part of the intermediate body (31) and is wrapped on the oval part of the intermediate body (31) in two parts of left and right; the diameter of the boss of the base (32) is greater than the diameter of the disc part of the intermediate body (31), the outer periphery of the boss of the base (32) is provided with a groove or a notch matched with the reinforcing rib; the lower end of the base (32) is fixedly connected with the upper end of the lower stage leg pipe; the lower end surface of the movable block (34) is provided with a guide strip (34a), and the upper surface of the boss of the base (32) is provided with a guide groove (32a) matched with the guide strip (34a).

2. The multi-stage telescoping support foot tube of claim 1, wherein: A compression spring is arranged between the movable block (34) and the upper clamping spring.

3. A multi-stage telescoping support foot tube according to claim 1 or 2, characterised in that: A limiting plug is arranged at the lower end of each square tube except the last one.

4. The multi-stage telescoping support foot tube of claim 1 or 2, wherein: The upper end of the first-stage leg tube (11) is arranged in the lower part of the tube leg base (10) through a connecting nut (50), and the first-stage leg tube (11) can rotate circumferentially relative to the tube leg base (10).

5. The multi-stage telescoping support foot tube of claim 1 or 2, wherein: The upper end of the first-stage leg tube (11) is arranged with a base (32), and a connecting piece (60) for fixing the first-stage square tube (21) and the tube leg base (10) is arranged in the through hole of the base (32); the lower end of the last-stage leg tube is arranged with a base (32), and a T-shaped sleeve (70) with an outer circle and an inner square is arranged between the base (32) and the last-stage square tube.

Images