Multi-stage telescopic supporting leg pipe capable of being quickly locked

Abstract

The utility model provides a multistage telescopic supporting leg tube capable of being locked quickly, which comprises a plurality of stages of leg tubes which are sequentially nested and connected, a plurality of stages of square tubes are arranged in the plurality of stages of leg tubes in a penetrating manner, and two symmetrical reinforcing ribs are axially arranged on the inner wall of each stage of leg tube; except for the first-stage foot tube, the upper end of each of the rest foot tubes is fixedly provided with a rotary locking mechanism; a square hole for the square tube to pass through is formed in the middle of the rotary locking mechanism on the lowest level of foot tube, and a round hole for the square tube to pass through is formed in the middle of the rotary locking mechanism on each of the rest levels of foot tubes; the upper end of the first-stage foot tube is provided with a screw cap, the middle of the screw cap is fixedly connected with the upper end of the first-stage square tube, the screw cap is screwed to drive the multi-stage square tube to rotate together, the multi-stage square tube further drives the lowermost-stage foot tube and the rotary locking mechanism on the lowermost-stage foot tube to rotate, and each rotary locking mechanism is matched with a reinforcing rib in the upper-stage foot tube to lock the lowermost-stage foot tube and the rotary locking mechanism on the lowermost-stage foot tube. The other levels of foot tubes can be driven to rotate successively, and finally all the foot tubes are in a locked or loosened state.

Description

TECHNICAL FIELD

[0001] The utility model relates to photographic equipment technical field, concretely relates to a multistage telescopic support foot pipe of quick locking. BACKGROUND

[0002] In photography, usually use tripod, four -legged stand or single -leg stand to provide support to photographic equipment, in order to make the height of tripod, four -legged stand or single -leg stand adjustable, the prior art generally designs support foot pipe as three -level, four -level even more level foot pipe of multistage foot pipe nested in turn, thereby realizing telescopic function. But in prior art, when the height of support foot pipe needs to be fixed, it is necessary to twist a plurality of locking members to lock each level foot pipe one by one, which is relatively cumbersome to operate, and time is wasted, and vice versa. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem to provide a multistage telescopic support foot pipe of quick locking, can make multistage foot pipe realize quick locking and quick release.

[0004] To solve the above technical problem, the technical scheme of the utility model is: a multistage telescopic support foot pipe of quick locking, the support foot pipe includes multistage foot pipe nested in turn, and multistage square pipe nested in turn is arranged in the multistage foot pipe, the pipe diameter of multistage foot pipe gradually decreases from top to bottom, and the pipe diameter of multistage square pipe gradually increases from top to bottom, the inner wall of each level foot pipe is provided with two symmetrical and parallel with the axis reinforcing ribs;

[0005] In addition to the first level foot pipe, the upper end of each level foot pipe is fixedly installed with a rotating locking mechanism, and the rotating locking mechanism in the lowermost level foot pipe is provided with a square hole for the square pipe to pass through, and the rotating locking mechanism in each level foot pipe is provided with a circular hole for the square pipe to pass through.

[0006] The upper end of the first level foot pipe is installed with a screw cap, and the middle part of the screw cap is fixedly connected with the upper end of the first level square pipe, and the screw cap can drive the multistage square pipe to rotate, and the multistage square pipe further drives the lowermost level foot pipe and the rotating locking mechanism thereon to rotate, and each rotating locking mechanism can drive the remaining foot pipes to rotate in turn by cooperating with the reinforcing ribs in the upper level foot pipe, so that all foot pipes are in the locked or released state.

[0007] The working principle and use method of the above technical scheme are:

[0008] 1) Since each leg tube has two symmetrical reinforcing ribs on its inner wall that are parallel to the axis, and each leg tube except the top one has a rotating locking mechanism installed at its upper end, and the cap on the first leg tube can be linked with the bottom leg tube and its rotating locking mechanism through the multi-stage square tubes; therefore, simply turning the cap will drive the multi-stage square tubes to rotate together, and the multi-stage square tubes will then drive the bottom leg tube and its rotating locking mechanism to rotate. Each rotating locking mechanism, by cooperating with the reinforcing rib in the upper leg tube, can drive the remaining leg tubes to rotate successively, so that all leg tubes are in a locked or unlocked state. This eliminates the need to hold the bottom leg tube by hand to rotate it, making the operation very convenient.

[0009] 2) When all the rotary locking mechanisms are in the loosened state, grasp the upper part of the support leg tube and lift it up. The multi-stage leg tube will then extend downwards under its own weight.

[0010] 3) Twist the cap to make it rotate in a certain direction relative to the top-level leg tube, thereby driving the bottom-level leg tube and other leg tubes to rotate successively, and causing all the rotating locking mechanisms to lock successively, thus enabling the multi-level leg tubes to be locked quickly.

[0011] 4) Twist the cap to make it rotate in the opposite direction to the top-level leg tube, which in turn drives the bottom-level leg tube and other leg tubes to rotate successively, and causes all the rotating locking mechanisms to loosen one after another, thus allowing the multi-level leg tubes to be released quickly.

[0012] Furthermore, a connecting plug with a central through hole is fixedly installed at the upper end of the first-stage foot tube. Multiple connecting posts protrude from the upper surface of the connecting plug. The cap has a hollow structure and is placed over the connecting plug. Multiple connecting posts pass through the hollow structure of the cap and protrude upwards, and are fixedly connected to a limiting plate by screws. The cap can rotate to a limited extent between the connecting plug and the limiting plate.

[0013] In one embodiment, the rotary locking mechanism includes a base and an eccentric wheel. The circumferential surface of the base has two symmetrical arc-shaped notches, and the upper part of the base has a circular boss that is not concentric with the circumferential surface of the base. The eccentric wheel has an axial aperture and an arc surface with an axial groove. The eccentric wheel is fitted onto the circular boss of the base through the aperture and then limited by a retaining spring. The eccentric wheel can rotate around the circular boss. The base is fixedly connected to the upper end of the leg tube; except for the uppermost leg tube, the upper end of each other leg tube... The rotating locking mechanism is inserted into the upper-level leg tube. The two arc-shaped notches on the circumference of the base and the groove on the eccentric wheel are matched with the reinforcing ribs in the upper-level leg tube. The width of the arc-shaped notch is greater than the width of the groove. The matching of the left and right sidewalls of the arc-shaped notch with the reinforcing ribs can limit the left and right rotation of the base and leg tube. The matching of the sidewalls of the groove with the reinforcing ribs can prevent the eccentric wheel from rotating with the base. The base installed on the lowest level leg tube has a square hole in the middle, and the base installed on each of the other level leg tubes has a round hole in the middle. Both the square hole and the round hole pass through a circular boss along the axial direction.

[0014] Furthermore, except for the lowest level leg tube, each level leg tube has a capping piece installed at its lower end to prevent the next level leg tube from detaching.

[0015] Furthermore, the lower end face of the screw cap is provided with a downwardly protruding square post, which is used to be inserted into the upper end of the first-stage square tube for fixed connection.

[0016] In one embodiment, the perforated structure on the screw cap is an arc-shaped through hole.

[0017] In one embodiment, the length of the eccentric wheel is less than the diameter of the base.

[0018] In one embodiment, the eccentricity of the circular boss on the base is 1 mm.

[0019] The beneficial effects of this utility model are: This utility model cleverly combines a screw cap, multi-stage square tubes, a rotating locking mechanism and reinforcing ribs. No matter how long the total length of the multi-stage leg tubes is after stretching, simply twisting the screw cap from the top can quickly lock and release the multi-stage leg tubes of no less than three stages, greatly improving the convenience of operation. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of the overall structure of the support leg tube after it is retracted in an embodiment of this utility model.

[0021] Figure 2 This is a schematic cross-sectional view of the overall structure of the support leg tube after it is retracted in an embodiment of this utility model.

[0022] Figure 3This is a partial cross-sectional view of the extended support leg tube in an embodiment of the present invention.

[0023] Figure 4 for Figure 3 A top-view structural diagram;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the base in an embodiment of this utility model;

[0025] Figure 6 for Figure 5 A top view of the structure when the through hole is a round hole;

[0026] Figure 7 for Figure 5 A top view of the structure when the through hole is a square hole;

[0027] Figure 8 This is a schematic diagram of the cross-sectional structure of the eccentric wheel in an embodiment of the present utility model;

[0028] Figure 9 For this Figure 8 A top-view structural diagram;

[0029] Figure 10 This is a schematic diagram of the cross-sectional structure of the connecting plug in an embodiment of the present utility model;

[0030] Figure 11 for Figure 10 A top-view structural diagram;

[0031] Figure 12 This is a schematic diagram of the cross-sectional structure of the screw cap in an embodiment of the present utility model;

[0032] Figure 13 for Figure 12 A schematic diagram of the structure viewed from below;

[0033] Figure 14 This is a schematic diagram of the cross-sectional structure of the limiting plate in an embodiment of the present utility model;

[0034] The attached figures are labeled as follows: 10, foot tube; 11, reinforcing rib; 20, square tube; 30, rotating locking mechanism; 31, base; 31a, arc-shaped notch; 31b, circular boss; 32, eccentric wheel; 32a, smooth hole; 32b, groove; 40, connecting plug; 41, connecting post; 50, screw cap; 51, arc-shaped through hole; 52, square post; 60, screw; 70, limiting plate; 80, closing piece. 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 utility model, 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" 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.

[0038] like Figures 1 to 14 As shown, a multi-stage telescopic support tube capable of quick locking includes a series of nested tubes 10, within which a series of nested square tubes 20 are inserted. The diameter of the tubes 10 decreases progressively from top to bottom, while the diameter of the square tubes 20 increases progressively from top to bottom. Each tube 10 has two symmetrical reinforcing ribs 11 parallel to its axis on its inner wall. Figure 1 The diagram shows a four-stage leg tube. Except for the first-stage leg tube 10, each of the remaining leg tubes 10 has a fixed rotating locking mechanism 30 at its upper end. The rotating locking mechanism 30 on the lowest-level leg tube 10 has a square hole in the center for the square tube 20 to pass through, while the rotating locking mechanism 30 on each of the remaining leg tubes 10 has a round hole in the center for the square tube 20 to pass through. A cap 50 is installed at the upper end of the first-stage leg tube 10, and the lower end face of the cap 50 has a downward-protruding square post 52, which is used to insert into the upper end of the first-stage square tube 20. By making a fixed connection, turning the cap 50 will cause the multi-stage square tubes 20 to rotate together. The multi-stage square tubes 20 will then drive the lowest-level leg tube 10 and the rotating locking mechanism 30 above it to rotate. Each rotating locking mechanism 30, by cooperating with the reinforcing rib 11 in the upper-level leg tube 10, can drive the remaining leg tubes 10 to rotate successively, so that all leg tubes 10 are in a locked or unlocked state. Except for the lowest-level leg tube 10, each leg tube 10 has a closing part 80 installed at its lower end to prevent the lower-level leg tube 10 from detaching.

[0039] like Figure 1 , Figures 10 to 14As shown, a connecting plug 40 with a central through hole is fixedly installed at the upper end of the first-stage foot tube 10. Multiple connecting posts 41 protrude from the upper surface of the connecting plug 40. Multiple arc-shaped through holes 51 are provided on the screw cap 50. The screw cap 50 covers the connecting plug 40. Multiple connecting posts 41 pass through the hollow structure of the screw cap 50 and protrude upwards, and are fixedly connected to a limiting plate 70 by screws 60. The screw cap 50 can rotate to a limited extent between the connecting plug 40 and the limiting plate 70.

[0040] like Figures 3 to 9 As shown, the rotary locking mechanism 30 includes a base 31 and an eccentric wheel 32. The circumferential surface of the base 31 has two symmetrical arc-shaped notches 31a. The upper part of the base 31 has a circular boss 31b that is not concentric with the circumferential surface of the base 31. The eccentric wheel 32 has an axial aperture 32a and an arc surface with an axial groove 32b. The eccentric wheel 32 is fitted onto the circular boss 31b of the base 31 through the aperture 32a and then limited by a retaining spring. The eccentric wheel 32 can rotate around the circular boss 31b. The base 31 is fixedly connected to the upper end of the foot tube 10. Except for the uppermost foot tube 10, the upper end of each of the other foot tubes 10 is connected to the rotary locking mechanism 30. The base 31 is inserted into the upper-level leg tube 10. The two arc-shaped notches 31a on the circumference of the base 31 and the groove 32b on the eccentric wheel 32 are matched with the reinforcing rib 11 in the upper-level leg tube 10. The width of the arc-shaped notch 31a is greater than the width of the groove 32b. The matching of the left and right side walls of the arc-shaped notch 31a with the reinforcing rib 11 can limit the left and right rotation of the base 31 and the leg tube 10. The matching of the side wall of the groove 32b with the reinforcing rib 11 can prevent the eccentric wheel 32 from rotating with the base 31. The base 31 installed on the lowest level leg tube 10 has a square hole in the middle. The base 31 installed on each of the other level leg tubes 10 has a round hole in the middle. Both the square hole and the round hole pass through the circular boss 31b along the axial direction.

[0041] In this embodiment, the multi-stage leg tubes 10 are all carbon fiber tubes, and the lower end of the base 31 is embedded into the upper end of the leg tube 10 and fixed by structural adhesive; the length of the eccentric wheel 32 is less than the diameter of the base 31; the eccentricity of the circular boss 31b on the base 31 is 1mm.

[0042] The working principle and usage of the above technical solution are as follows:

[0043] 1) Since each leg tube 10 has two symmetrical reinforcing ribs 11 parallel to the axis on its inner wall, and each leg tube 10 except the top leg tube 10 is equipped with a rotary locking mechanism 30 at its upper end, and the cap 50 on the first leg tube 10 can be linked with the bottom leg tube 10 and its rotary locking mechanism 30 through the multi-stage square tube 20; therefore, simply turning the cap 50 will drive the multi-stage square tube 20 to rotate together, and the multi-stage square tube 20 will then drive the bottom leg tube 10 and its rotary locking mechanism 30 to rotate. Each rotary locking mechanism 30, by cooperating with the reinforcing rib 11 in the previous leg tube 10, can drive the other leg tubes 10 to rotate successively, so that all leg tubes 10 are in a locked or unlocked state. In this way, it is not necessary to hold the bottom leg tube 10 by hand to rotate it, which is very convenient to operate.

[0044] 2) When all the rotary locking mechanisms 30 are in the loose state, grab the upper part of the support leg tube 10 and lift it up. The multi-stage leg tube 10 will extend downwards under its own weight.

[0045] 3) Twist the cap 50 to make it rotate in a certain direction relative to the uppermost foot tube 10, thereby driving the lowermost foot tube 10 and other foot tubes 10 to rotate successively, and causing all the rotating locking mechanisms 30 to lock successively, so that the multi-stage foot tubes 10 can be quickly locked.

[0046] 4) Twist the cap 50 to make it rotate in the opposite direction to the uppermost foot tube 10, thereby driving the lowermost foot tube 10 and other foot tubes 10 to rotate successively, and causing all the rotating locking mechanisms 30 to loosen successively, so that the multi-stage foot tubes 10 can be quickly released.

[0047] In this embodiment, the screw cap 50, multi-stage square tube 20, rotation locking mechanism and reinforcing rib 11 are cleverly combined. No matter how long the total length of the multi-stage leg tube 10 is after stretching, the screw cap 50 can be turned from the top to quickly lock and release the multi-stage leg tube 10 with no less than three stages, which greatly improves the convenience of operation.

[0048] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

[0049] To facilitate understanding by those skilled in the art of the improvements of this utility model over the prior art, some of the drawings and descriptions of this utility model 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 utility model.

Claims

1. A multi-stage telescopic support tube that can be quickly locked, comprising a multi-stage tube (10) nested in sequence, wherein a multi-stage square tube (20) nested in sequence is inserted inside the multi-stage tube (10), wherein the diameter of the multi-stage tube (10) decreases from top to bottom, and the diameter of the multi-stage square tube (20) increases from top to bottom, and each stage of the tube (10) has two symmetrical reinforcing ribs (11) on its inner wall that are parallel to the axis. Its features are: Except for the first-level leg tube (10), the upper end of each of the other leg tubes (10) is fixedly equipped with a rotary locking mechanism (30); the rotary locking mechanism (30) on the lowest level leg tube (10) has a square hole in the middle for the square tube (20) to pass through, and the rotary locking mechanism (30) on each of the other leg tubes (10) has a round hole in the middle for the square tube (20) to pass through; A cap (50) is installed at the upper end of the first-level leg tube (10). The middle part of the cap (50) is fixedly connected to the upper end of the first-level square tube (20). Twisting the cap (50) will drive the multi-level square tubes (20) to rotate together. The multi-level square tubes (20) will then drive the lowest level leg tube (10) and its rotating locking mechanism (30) to rotate. Each rotating locking mechanism (30) can drive the other levels of leg tubes (10) to rotate successively by cooperating with the reinforcing rib (11) in the previous level leg tube (10), so that all the leg tubes (10) are in a locked or unlocked state.

2. The multi-stage telescopic support tube capable of quick locking according to claim 1, characterized in that: The upper end of the first-stage foot tube (10) is fixedly installed with a connecting plug (40) with a central through hole. The upper surface of the connecting plug (40) has multiple connecting posts (41) protruding. The cap (50) has a hollow structure. The cap (50) covers the connecting plug (40). Multiple connecting posts (41) pass through the hollow structure of the cap (50) and protrude upwards and are fixedly connected to a limiting plate (70) by screws (60). The cap (50) can rotate to a limited extent between the connecting plug (40) and the limiting plate (70).

3. The multi-stage telescopic support tube capable of rapid locking according to claim 1 or 2, characterized in that: The rotary locking mechanism (30) includes a base (31) and an eccentric wheel (32). The circumferential surface of the base (31) is provided with two symmetrical arc-shaped notches (31a). The upper part of the base (31) is provided with a circular boss (31b) that is not concentric with the circumferential surface of the base (31). The eccentric wheel (32) is provided with an axial aperture (32a) and has an arc surface with an axial groove (32b). The eccentric wheel (32) is sleeved on the circular boss (31b) of the base (31) through the aperture (32a) and then limited by a snap ring. The eccentric wheel (32) can rotate around the circular boss (31b). The base (31) is fixedly connected to the upper end of the foot tube (10). Except for the uppermost foot tube (10), the upper end of each other foot tube (10) is connected to the rotary locking mechanism. The structure (30) is inserted into the upper-level foot tube (10). The two arc-shaped notches (31a) on the circumference of the base (31) and the groove (32b) on the eccentric wheel (32) are matched with the reinforcing rib (11) in the upper-level foot tube (10). The width of the arc-shaped notch (31a) is greater than the width of the groove (32b). The matching of the left and right sidewalls of the arc-shaped notch (31a) with the reinforcing rib (11) can limit the left and right rotation of the base (31) and the foot tube (10). The matching of the sidewall of the groove (32b) with the reinforcing rib (11) can prevent the eccentric wheel (32) from rotating with the base (31). The base (31) installed on the lowest level foot tube (10) has a square hole in the middle, and the base (31) installed on each of the other level foot tubes (10) has a round hole in the middle. Both the square hole and the round hole axially penetrate the circular boss (31b).

4. The multi-stage telescopic support tube capable of rapid locking according to claim 1 or 2, characterized in that: Except for the lowest level leg tube (10), each level leg tube (10) has a capping piece (80) installed at its lower end to prevent the next level leg tube (10) from detaching.

5. The multi-stage telescopic support tube capable of rapid locking according to claim 1 or 2, characterized in that: The lower end face of the screw cap (50) is provided with a downward protruding square post (52), which is used to be inserted into the upper end of the first-stage square tube (20) for fixed connection.

6. The multi-stage telescopic support leg tube capable of quick locking according to claim 2, characterized in that: The perforated structure on the screw cap (50) is an arc-shaped through hole (51).

7. The multi-stage telescopic support tube capable of quick locking according to claim 3, characterized in that: The length of the eccentric wheel (32) is less than the diameter of the base (31).

8. The multi-stage telescopic support leg tube capable of quick locking according to claim 3, characterized in that: The eccentricity of the circular boss (31b) on the base (31) is 1 mm.

9. The multi-stage telescopic support tube capable of rapid locking according to claim 1 or 2, characterized in that: All of the multi-stage leg tubes (10) are carbon fiber tubes.

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