Foot tube quick locking structure

Abstract

The utility model discloses a foot tube quick locking structure which comprises a first foot tube, a second foot tube and a third foot tube which are sequentially matched in an inserted mode, the first foot tube and the second foot tube are connected with a first locking assembly, and the second foot tube and the third foot tube are connected with a second locking assembly. A synchronous rod is jointly inserted into the first foot tube, the second foot tube and the third foot tube, and the first locking assembly and the second locking assembly are both connected with the synchronous rod; the second foot tube is rotationally arranged relative to the first foot tube and the third foot tube; when the second foot tube rotates in the first direction, the second foot tube drives the first locking assembly and the second locking assembly to conduct locking action synchronously. When the second foot pipe rotates in the second direction, the second foot pipe drives the first locking assembly and the second locking assembly to conduct unlocking action synchronously. According to the utility model, under the action of independently rotating the second foot tube, the first locking assembly and the second locking assembly can be synchronously driven to carry out locking or unlocking actions, and manual operation is reduced, so that the operation efficiency is improved, and the use requirements of users are met.

Description

Technical Field

[0001] The utility model relates to the technical field of photographic tripods, in particular to a tripod quick locking structure. Background Art

[0002] In existing tripod telescopic legs, adjacent legs are equipped with locking assemblies that lock or unlock using a locking knob. This locking mechanism presents a technical problem: the adjacent legs must be locked or unlocked independently. When the entire telescopic leg consists of three or more legs, the locking knob must be repeatedly tightened or loosened, making it impossible to achieve simultaneous locking or unlocking by turning a single component. This results in complex operation and a difficulty in quickly locking or unlocking, requiring further improvement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a leg tube quick locking structure.

[0004] A leg quick locking structure designed for this purpose includes a first leg, a second leg, and a third leg that are sequentially plugged into each other. The first leg and the second leg are connected to a first locking assembly, and the second leg and the third leg are connected to a second locking assembly. A synchronization rod is commonly plugged into the first, second, and third leg, and the first and second locking assemblies are both connected to the synchronization rod.

[0005] The second leg is rotatably arranged relative to the first leg and the third leg;

[0006] When the second leg rotates in the first direction, it drives the first locking assembly and the second locking assembly to perform locking actions synchronously;

[0007] When the second leg rotates along the second direction, it drives the first locking assembly and the second locking assembly to perform unlocking actions synchronously.

[0008] Preferably, the first locking assembly includes a first locking sleeve fixedly arranged at the lower end of the first leg tube, a sliding sleeve is sleeved on the synchronization rod, the first locking sleeve is provided with a first limiting ring that fits with the outer wall of the sliding sleeve, a second limiting ring is provided at the upper end of the sliding sleeve, and a first spring is sleeved on the sliding sleeve between the second limiting ring and the first limiting ring;

[0009] A rotating connector is rotatably provided on the sliding sleeve below the first limiting ring, and a plurality of first pipe clamps are provided on the rotating connector. The inner side wall of the first pipe clamp is a first conical inclined surface, and the outer side wall of the first locking sleeve is a second conical inclined surface. The first conical inclined surface is in contact with the second conical inclined surface, and the outer side wall of the first pipe clamp is in contact with the inner wall of the second leg tube.

[0010] The rotating connecting member is arranged to rotate synchronously with the second leg tube; the rotating connecting member is arranged to move up and down relative to the second leg tube;

[0011] The upper surface of the rotating connection member is provided with a plurality of first guide bevel blocks in a circumferential array, the lower surface of the first locking sleeve is provided with a plurality of second guide bevel blocks, and the lower surface of the first guide bevel blocks is in contact with the upper surface of the second guide bevel blocks.

[0012] Preferably, a limit seat is fixed on the synchronization rod below the rotating connection member, a limit track groove is provided on the limit seat, and a limit block movably plugged into the limit track groove is provided on the rotating connection member.

[0013] Preferably, the outer wall surface of the first tube clamp is provided with a first friction member that fits against the inner wall of the second leg tube.

[0014] Preferably, the sliding sleeve is provided with a longitudinal guide groove, and the first limiting ring is provided with a positioning column movably inserted in the longitudinal guide groove.

[0015] Preferably, the second locking assembly includes a second locking sleeve fixedly connected to the lower end of the second leg tube, a fixing sleeve fixedly provided at the lower end of the synchronization rod, the second locking sleeve is provided with a third limiting ring abutting against the outer wall of the fixing sleeve, a fourth limiting ring is provided at the upper end of the fixing sleeve, and a second spring is sleeved between the third limiting ring and the fourth limiting ring;

[0016] The fixing sleeve is fixedly provided with a fixing connector, and a plurality of second pipe clamps are provided on the fixing connector. The inner side wall of the second pipe clamp is a third conical inclined surface, and the outer side wall of the second locking sleeve is a fourth conical inclined surface. The third conical inclined surface is in contact with the fourth conical inclined surface, and the outer side wall of the second pipe clamp is in contact with the inner wall of the third leg tube.

[0017] The upper surface of the fixed connection member is provided with a plurality of third guide bevel blocks in a circumferential array, and the lower surface of the second locking sleeve is provided with a plurality of fourth guide bevel blocks, and the lower surface of the third guide bevel blocks is in contact with the upper surface of the fourth guide bevel blocks;

[0018] The fixed connection member and the third leg are slidably arranged.

[0019] Preferably, the outer wall of the second pipe clamp is provided with a second friction member which is in contact with the inner wall of the third leg.

[0020] Preferably, the second leg is fixedly provided with a rotating sleeve.

[0021] Compared to the prior art, the second leg of the present invention is rotatably arranged relative to the first and third legs. When the second leg rotates in a first direction, it drives the first and second locking assemblies to synchronously lock. When the second leg rotates in a second direction, it drives the first and second locking assemblies to synchronously unlock. The present invention can synchronously drive the first and second locking assemblies to lock or unlock by rotating the second leg alone. This reduces manual operation, thereby improving operational efficiency and enhancing the user experience, meeting user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 This is one of the cross-sectional structural diagrams of the present utility model;

[0024] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0025] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0026] Figure 5 This is the second schematic diagram of the cross-sectional structure of the present utility model;

[0027] Figure 6 Schematic diagram of the three-dimensional structure of the first locking assembly and the second locking assembly;

[0028] Figure 7 is a structural schematic diagram of the first locking sleeve and the rotating connecting member;

[0029] Figure 8 is a structural schematic diagram of the second locking sleeve and the fixed connecting member;

[0030] Figure 9 Schematic diagram of the cross-sectional structure of the leg tube in the retracted state;

[0031] Figure 10 Schematic diagram of the three-dimensional structure of the tripod. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] See also Figures 1-10 , a leg tube quick locking structure includes a first leg tube 10, a second leg tube 20 and a third leg tube 30 that are plugged in and matched in sequence, the first leg tube 10 and the second leg tube 20 are connected to a first locking assembly 40, and the second leg tube 20 and the third leg tube 30 are connected to a second locking assembly 50, and a synchronization rod 60 is commonly plugged into the first leg tube 10, the second leg tube 20 and the third leg tube 30, and the first locking assembly 40 and the second locking assembly 50 are both connected to the synchronization rod 60; the second leg tube 20 is rotatably arranged relative to the first leg tube 10 and the third leg tube 30; when the second leg tube 20 rotates in the first direction, it drives the first locking assembly 40 and the second locking assembly 50 to perform a locking action synchronously; when the second leg tube 20 rotates in the second direction, it drives the first locking assembly 40 and the second locking assembly 50 to perform an unlocking action synchronously.

[0034] The utility model can realize synchronous driving of the first locking component and the second locking component to lock or unlock by rotating the second leg alone. The utility model can reduce manual operation, thereby improving operation efficiency, enhancing user experience and meeting user needs.

[0035] See also Figure 3 The first locking assembly 40 includes a first locking sleeve 410 fixedly arranged at the lower end of the first leg tube 10, a sliding sleeve 420 is sleeved on the synchronization rod 60, the first locking sleeve 410 is provided with a first limiting ring 413 that is in contact with the outer wall of the sliding sleeve 420, a second limiting ring 423 is provided at the upper end of the sliding sleeve 420, and a first spring 430 is sleeved on the sliding sleeve 420 between the second limiting ring 423 and the first limiting ring 413;

[0036] A rotating connector 440 is rotatably mounted on the sliding sleeve 420 below the first limiting ring 413. A plurality of first pipe clamps 460 are mounted on the rotating connector 440. The inner wall of each first pipe clamp 460 is a first conical slope 461. The outer wall of each first locking sleeve 410 is a second conical slope 411. The first conical slope 461 is aligned with the second conical slope 411. Furthermore, the outer wall of each first pipe clamp 460 is aligned with the inner wall of the second leg 20.

[0037] The rotating connecting member 440 is synchronously rotated with the second leg tube 20; the rotating connecting member 440 is movable up and down relative to the second leg tube 20;

[0038] The upper surface of the rotating connecting member 440 is provided with a plurality of first guide bevels 441 in a circumferential array, and the lower surface of the first locking sleeve 410 is provided with a plurality of second guide bevels 412 . The lower surface of the first guide bevel 441 is in contact with the upper surface of the second guide bevel 412 .

[0039] When unlocking, the second leg 20 is operated to rotate in the second direction, synchronously driving the rotating connector 440 to rotate. Under the action of the second guide bevel 412 and the first guide bevel 441, the rotating connector 440 and the first tube clamp 460 move in a direction away from the first locking sleeve 410, so that the first tube clamp 460 is separated from the first locking sleeve 410. Without the squeezing action of the first locking sleeve 410, the second leg 20 can move freely up and down relative to the first tube 10, thereby achieving unlocking.

[0040] In the present invention, the first spring 430 is used to provide an upward force to the sliding sleeve 420 to drive the sliding sleeve 420, the rotating connecting member 440, and the first tube clamp 460 to move upward, so that the first tube clamp 460 is squeezed upward with the first locking sleeve 410, so that the first tube clamp 460 is close to the inner wall of the second tube 20, thereby achieving locking.

[0041] See also Figure 6 A limit seat 450 is fixed to the synchronization rod 60 below the rotating connector 440. The limit seat 450 is provided with a limit track groove 451. The rotating connector 440 is provided with a limit block 442 that is movably inserted into the limit track groove 451. The limit block 442 cooperates with the limit track groove 451 to constrain the rotation angle of the second leg 20 in connection with the rotating connector 440.

[0042] See also Figure 3 and Figure 6 The outer wall of the first tube clamp 460 is provided with a first friction member 470 that fits against the inner wall of the second leg tube 20. The function of the first friction member 470 is to strengthen the friction with the inner wall of the second leg tube 20 to improve the locking stability.

[0043] See also Figure 3 The sliding sleeve 420 is provided with a longitudinal guide groove 421, and the first limiting ring 413 is provided with a positioning column 422 that is movably inserted into the longitudinal guide groove 421. The positioning column 422 is movably inserted into the longitudinal guide groove 421, which can effectively improve the movement stability.

[0044] See also Figure 4 and Figure 5The second locking assembly 50 includes a second locking sleeve 510 fixedly connected to the lower end of the second leg tube 20, a fixing sleeve 550 fixedly provided at the lower end of the synchronization rod 60, the second locking sleeve 510 is provided with a third limiting ring 512 that is in contact with the outer wall of the fixing sleeve 550, and a fourth limiting ring 551 is provided at the upper end of the fixing sleeve 550. A second spring 560 is sleeved between the third limiting ring 512 and the fourth limiting ring 551;

[0045] The fixing sleeve 550 is fixedly provided with a fixing connector 520. A plurality of second pipe clamps 530 are provided on the fixing connector 520. The inner wall of the second pipe clamp 530 is a third tapered inclined surface 531. The outer wall of the second locking sleeve 510 is a fourth tapered inclined surface 511. The third tapered inclined surface 531 is aligned with the fourth tapered inclined surface 511. The outer wall of the second pipe clamp 530 is aligned with the inner wall of the third leg tube 30.

[0046] The upper surface of the fixed connector 520 is provided with a plurality of third guide bevels 521 arranged in a circumferential array. The lower surface of the second locking sleeve 510 is provided with a plurality of fourth guide bevels 513. The lower surfaces of the third guide bevels 521 are in contact with the upper surfaces of the fourth guide bevels 513.

[0047] The fixed connection member 520 and the third leg tube 30 are slidably arranged.

[0048] When the second pipe 20 rotates in the second direction, the third guide bevel 521 cooperates with the fourth guide bevel 513 to cause the second pipe 20, the second locking sleeve 510 and the fixed connection member 520 to move relative to each other, thereby separating the second pipe clamp 530 from the second locking sleeve 510. Without the squeezing effect of the second locking sleeve 510, the second pipe clamp 530 can deform inwardly, so that the third pipe 30 can move freely up and down, thereby achieving unlocking.

[0049] In the present invention, the second spring 560 is used to provide an upward force to the fixing sleeve 550, so that the second pipe clamp 530 moves upward and squeezes the second locking sleeve 510, so that the first pipe clamp 460 is close to the inner wall of the second pipe 20, thereby achieving locking.

[0050] See also Figure 4 and Figure 6 The outer wall of the second tube clamp 530 is provided with a second friction member 540 that fits with the inner wall of the third leg tube 30. The function of the second friction member 540 is to strengthen the friction with the inner wall of the third leg tube 30 to improve the locking stability.

[0051] See also Figure 1 The second leg tube 20 is fixedly provided with a rotating sleeve 70 so that the second leg tube 20 can be rotated by holding the rotating sleeve 70 .

[0052] See also Figure 3 and Figure 5 A first positioning groove 442 is provided on the outer wall of the rotating connecting member 440, and a first positioning rib 200 is provided on the inner wall of the second leg tube 20. The first positioning rib 200 is inserted into the first positioning groove 442. The two cooperate to constrain the rotating connecting member 440 to rotate synchronously with the second leg tube 20, and the rotating connecting member 440 can move up and down relative to the second leg tube 20.

[0053] See also Figure 4 The inner wall of the third leg tube 30 is provided with a second positioning rib 310, and the outer wall of the fixed connection member 520 is provided with a second positioning groove 522. The second positioning rib 310 is inserted into the second positioning groove 522. This function is to ensure that the fixed connection member 520 can only move up and down relative to the third leg tube 30, and it cannot rotate relative to the third leg tube 30. Therefore, when the second locking sleeve 510 rotates, under the cooperation of the third guide bevel 521 and the fourth guide bevel 513, the second locking sleeve 510 drives the fixed connection member 520 to move in the direction away from the second locking sleeve 510.

[0054] See also Figure 5 The synchronization rod 60 is provided with a guide element 610 at its upper end. A third positioning groove 611 is provided on its outer wall. The first leg 10 is provided with a third positioning rib 100, which is movably inserted into the third positioning groove 611. Due to the active cooperation between the third positioning rib 100 and the third positioning groove 611, the guide element 610 and the synchronization rod 60 can only move up and down relative to the first leg 10, and cannot rotate relative to the first leg 10.

[0055] See also Figure 10 In the application of the leg tube in the tripod, the first leg tube 10 is hinged to the pan head seat 80.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A leg tube quick locking structure, comprising a first leg tube (10), a second leg tube (20) and a third leg tube (30) which are plugged into each other in sequence, characterized in that: The first leg tube (10) and the second leg tube (20) are connected to a first locking assembly (40), the second leg tube (20) and the third leg tube (30) are connected to a second locking assembly (50), a synchronization rod (60) is commonly inserted into the first leg tube (10), the second leg tube (20) and the third leg tube (30), and the first locking assembly (40) and the second locking assembly (50) are both connected to the synchronization rod (60); The second leg tube (20) is rotatably arranged relative to the first leg tube (10) and the third leg tube (30); When the second leg (20) rotates in the first direction, it drives the first locking component (40) and the second locking component (50) to perform a locking action synchronously; When the second leg (20) rotates in the second direction, it drives the first locking component (40) and the second locking component (50) to synchronously perform an unlocking action.

2. The leg quick locking structure according to claim 1, characterized in that: The first locking assembly (40) comprises a first locking sleeve (410) fixedly arranged at the lower end of the first leg tube (10); a sliding sleeve (420) is sleeved on the synchronization rod (60); the first locking sleeve (410) is provided with a first limiting ring (413) fitted with the outer wall of the sliding sleeve (420); a second limiting ring (423) is provided at the upper end of the sliding sleeve (420); and a first spring (430) is sleeved on the sliding sleeve (420) between the second limiting ring (423) and the first limiting ring (413); A rotating connecting piece (440) is rotatably provided on the sliding sleeve (420) below the first limiting ring (413), and a plurality of first pipe clamps (460) are provided on the rotating connecting piece (440). The inner wall surface of the first pipe clamp (460) is a first conical inclined surface (461), and the outer wall surface of the first locking sleeve (410) is a second conical inclined surface (411). The first conical inclined surface (461) is in contact with the second conical inclined surface (411), and the outer wall surface of the first pipe clamp (460) is in contact with the inner wall of the second leg tube (20). The rotating connecting member (440) is arranged to rotate synchronously with the second leg tube (20); the rotating connecting member (440) is arranged to move up and down relative to the second leg tube (20); The upper surface of the rotating connecting member (440) is provided with a plurality of first guide bevel blocks (441) in a circumferential array, the lower surface of the first locking sleeve (410) is provided with a plurality of second guide bevel blocks (412), and the lower surface of the first guide bevel blocks (441) is in contact with the upper surface of the second guide bevel blocks (412).

3. The leg quick locking structure according to claim 2, characterized in that: A limit seat (450) is fixed on the synchronization rod (60) below the rotating connection member (440), a limit track groove (451) is provided on the limit seat (450), and a limit block (442) movably plugged into the limit track groove (451) is provided on the rotating connection member (440).

4. A leg quick locking structure according to claim 2 or 3, characterized in that: The outer wall surface of the first tube clamp (460) is provided with a first friction member (470) that fits in contact with the inner wall of the second leg tube (20).

5. A leg quick locking structure according to claim 2 or 3, characterized in that: The sliding sleeve (420) is provided with a longitudinal guide groove (421), and the first limiting ring (413) is provided with a positioning column (422) movably inserted into the longitudinal guide groove (421).

6. The leg quick locking structure according to claim 1, characterized in that: The second locking assembly (50) includes a second locking sleeve (510) fixedly connected to the lower end of the second leg tube (20), a fixing sleeve (550) fixedly provided at the lower end of the synchronization rod (60), the second locking sleeve (510) is provided with a third limiting ring (512) affixed to the outer wall of the fixing sleeve (550), the upper end of the fixing sleeve (550) is provided with a fourth limiting ring (551), and a second spring (560) is sleeved between the third limiting ring (512) and the fourth limiting ring (551); The fixing sleeve (550) is fixedly provided with a fixing connection piece (520), and a plurality of second pipe clamps (530) are provided on the fixing connection piece (520), the inner wall surface of the second pipe clamps (530) is a third conical inclined surface (531), the outer wall surface of the second locking sleeve (510) is a fourth conical inclined surface (511), the third conical inclined surface (531) is in contact with the fourth conical inclined surface (511), and the outer wall surface of the second pipe clamps (530) is in contact with the inner wall of the third leg tube (30); The upper surface of the fixed connection member (520) is provided with a plurality of third guide bevel blocks (521) in a circumferential array, the lower surface of the second locking sleeve (510) is provided with a plurality of fourth guide bevel blocks (513), and the lower surface of the third guide bevel blocks (521) is in contact with the upper surface of the fourth guide bevel blocks (513); The fixed connection member (520) and the third leg tube (30) are slidably arranged.

7. The leg quick locking structure according to claim 6, characterized in that: The outer wall of the second tube clamp (530) is provided with a second friction member (540) which is in contact with the inner wall of the third leg tube (30).

8. The leg quick locking structure according to claim 1, characterized in that: The second leg tube (20) is fixedly provided with a rotating sleeve (70).

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