Tripod telescopic locking structure

Abstract

The utility model discloses a tripod telescopic locking structure which comprises a holder seat, a plurality of telescopic foot rods are arranged on the holder seat along the circumference in an array mode, each telescopic foot rod comprises a connecting seat connected with the holder seat in a rotating mode, two first foot pipes extending downwards are arranged on the connecting seat in a left-right spaced mode, and a second foot pipe is arranged between the left first foot pipe and the right first foot pipe. The upper end of the second foot tube is fixedly connected with a sliding seat, the sliding seat is in sliding connection with the first foot tube, and a third foot tube is movably inserted into the second foot tube; a first mounting cavity and a second mounting cavity are formed in the front side and the rear side of the sliding seat correspondingly, and a first locking assembly used for being locked with the first foot pipe in a friction mode is arranged in the first mounting cavity. A driven assembly capable of moving up and down relative to the second mounting cavity is arranged in the second mounting cavity, a driven rod connected with the driven assembly is inserted into the second foot pipe and the third foot pipe, and the lower end of the driven rod is connected with a second locking assembly. The sliding seat is provided with a synchronous driving assembly used for synchronous locking or unlocking.

Description

TECHNICAL FIELD

[0001] The utility model relates to photographic tripod technical field, especially in a tripod telescopic locking structure. BACKGROUND

[0002] The locking mode of the existing telescopic tripod is that the first leg pipe and the second leg pipe are locked, and the second leg pipe and the third leg pipe are locked. The whole telescopic leg needs to be locked or unlocked twice, which is complicated to operate and cannot be quickly locked or unlocked by one key, and needs to be further improved. UTILITY MODEL CONTENTS

[0003] The utility model aims at solving one of the technical problems in the prior art. Therefore, the utility model provides a telescopic leg one-key locking or unlocking tripod telescopic locking structure.

[0004] A tripod telescopic locking structure designed for this purpose comprises a holder, the holder is circumferentially arrayed with a plurality of telescopic leg pipes, the telescopic leg pipe comprises a connecting seat rotationally connected with the holder, two downwardly extending first leg pipes are left and right spaced apart on the connecting seat, a second leg pipe is arranged between the two first leg pipes, a sliding seat is fixedly connected to the upper end of the second leg pipe, the sliding seat is slidingly connected with the first leg pipe, and a third leg pipe is movably inserted into the second leg pipe;

[0005] Characterized in that: the front and rear sides of the sliding seat are respectively provided with a first mounting cavity and a second mounting cavity, a first locking assembly for friction locking with the first leg pipe is arranged in the first mounting cavity;

[0006] A driven assembly that can move up and down relative to the second mounting cavity is arranged in the second mounting cavity, a driven rod is inserted into the second leg pipe and the third leg pipe, the upper end of the second leg pipe and the second mounting cavity are in communication with each other, the driven rod is connected with the driven assembly, and a second locking assembly for frictionally abutting with the inner wall of the third leg pipe is arranged at the lower end of the driven rod;

[0007] A synchronous driving assembly for driving the first locking assembly and the driven assembly to drive the second locking assembly to be synchronously locked or unlocked is arranged on the sliding seat.

[0008] As a preferred, the sliding seat is respectively provided with a leg pipe hole penetrating up and down, the first leg pipe is arranged in the leg pipe hole, and the first mounting cavity is provided with a communication gap in communication with the leg pipe hole;

[0009] The first locking assembly comprises a first locking block movably arranged in the first mounting cavity, and the first locking block is connected with the sliding seat through a first elastic element.

[0010] The synchronous driving assembly is used to drive the first locking block to move towards the first leg pipe, and the first locking block and the first leg pipe are in frictional locking by being in abutment with each other.

[0011] Preferably, a frictional locking block is arranged between the first locking block and the first leg pipe.

[0012] Preferably, the driven assembly comprises a driven block arranged to move up and down in the second mounting cavity, the driven rod is connected with the driven block, a driving block is arranged to move forward and backward in the second mounting cavity, a driving inclined block is arranged on the wall surface of the driving block facing the driven block, and a driven inclined block is arranged on the wall surface of the driven block facing the driving block.

[0013] Under the cooperation of the driven inclined block and the driving inclined block, the driving block moving forward and backward can drive the driven block to move up and down relative to the second mounting cavity.

[0014] The synchronous driving assembly comprises a buckle, the buckle is provided with an abutting part for abutting against the driving block, the abutting part is provided with a connecting bolt, and the connecting bolt is arranged to pass through the second mounting cavity to be fixedly connected with the first mounting cavity and the first locking block.

[0015] Preferably, a guide piece is arranged in the second mounting cavity, the driven block is provided with a first guide groove, the guide piece is movably inserted into the first guide groove, and the driven block moves up and down relative to the guide piece.

[0016] The driving block is provided with a guide hole, and the guide piece is movably inserted into the guide hole.

[0017] The guide piece is hollow inside and communicates with the first mounting cavity and the second mounting cavity respectively.

[0018] Preferably, the second locking assembly comprises a conical locking sleeve connected to the lower end of the driven rod, a plurality of pipe clamping pieces are arranged in an array along the circumference on the outer side of the conical locking sleeve, a first conical inclined surface is arranged on the wall surface of the conical locking sleeve facing the pipe clamping pieces, and the first conical inclined surface is in abutment with a second conical inclined surface of the conical locking sleeve.

[0019] The outer wall of the pipe clamping piece is in abutment with the inner wall of the third leg pipe.

[0020] The second leg pipe is provided with a matching pipe piece extending downward, and the driven rod passes through the matching pipe piece.

[0021] The upper end surface of the pipe clamping piece is in abutment with the lower end surface of the matching pipe piece.

[0022] The lower end of the conical locking sleeve is provided with a limiting ring, and a second elastic element is sleeved on the conical locking sleeve between the limiting ring and the pipe clamp.

[0023] Compared with the prior art, the synchronous driving assembly can drive the first locking assembly and the driven assembly to drive the second locking assembly to be synchronously locked or unlocked. The synchronous driving assembly can realize one-key operation of the whole telescopic leg to realize locking or unlocking, facilitates operation, optimizes user experience, and meets user needs. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of a three-legged stand;

[0025] Figure 2 is a schematic view of a telescopic leg;

[0026] Figure 3 is a schematic view of a cross-sectional structure of a telescopic leg;

[0027] Figure 4 is a schematic view of a cross-sectional structure of a telescopic leg;

[0028] Figure 5 is a schematic view of a cross-sectional structure of a telescopic leg;

[0029] Figure 6 is Figure 3 is an enlarged structural schematic view of position A in FIG. 6;

[0030] Figure 7 is a schematic view of a telescopic leg in an unlocked state. DETAILED DESCRIPTION

[0031] The utility model will be further described below in combination with the drawings and embodiments.

[0032] Referring to Figures 1-7 1. A telescopic locking structure of a tripod, comprising a holder 10, a plurality of telescopic legs 20 are arranged along the circumference of the holder 10, each telescopic leg 20 comprises a connecting seat 210 rotatably connected to the holder 10, two first leg pipes 220 are arranged on the connecting seat 210 at intervals in the left-right direction and extend downward, a second leg pipe 230 is arranged between the two first leg pipes 220, a sliding seat 250 is fixedly connected to the upper end of the second leg pipe 230, the sliding seat 250 is slidably connected to the first leg pipe 220, and a third leg pipe 240 is movably inserted into the second leg pipe 230;

[0033] first and second installation cavities 252 and 253 are arranged on the front and back sides of the sliding seat 250, respectively, the first installation cavity 252 is provided with a first locking assembly 30 for friction locking with the first leg pipe 220;

[0034] The second installation cavity 253 is provided with a driven assembly 40 movable up and down relative to the second installation cavity 253, the second foot pipe 230 is provided with a driven rod 70 inserted in the third foot pipe 240, the upper end of the second foot pipe 230 is in communication with the second installation cavity 253, the driven rod 70 is connected with the driven assembly 40, and the lower end of the driven rod 70 is provided with a second locking assembly 60 used for frictionally abutting against the inner wall of the third foot pipe 240;

[0035] The sliding seat 250 is provided with a synchronous driving assembly 50 used for driving the first locking assembly 30 and the driven assembly 40 to drive the second locking assembly 60 to be synchronously locked or unlocked.

[0036] In the above embodiment, the synchronous driving assembly can drive the first locking assembly and the driven assembly to drive the second locking assembly to be synchronously locked or unlocked. The synchronous driving assembly can realize one-key operation of the whole telescopic foot pipe to be locked or unlocked, is convenient to operate, optimizes the user experience, and meets the needs of users.

[0037] Referring to Figures 3 to 5 , the sliding seat 250 is provided with a foot pipe hole 251 penetrating up and down on the left and right, the first foot pipe 220 is arranged in the foot pipe hole 251, and the first installation cavity 252 is provided with a communication gap 254 in communication with the foot pipe hole 251; the first locking assembly 30 comprises a first locking block 320 movably arranged in the first installation cavity 252, the first locking block 320 is connected with a first elastic element 350, the synchronous driving assembly 50 is used for driving the first locking block 320 to move towards the first foot pipe 220, and the first locking block 320 and the first foot pipe 220 are in abutment to realize friction locking.

[0038] The first elastic element 350 is a spring, and the first elastic element 350 applies a force for driving the first locking block 350 to move away from the first foot pipe 220. Therefore, when the synchronous driving assembly 50 is unlocked, the first locking block 350 moves away from the first foot pipe 220 under the action of the first elastic element 350, and unlocking is realized. When locking, the synchronous driving assembly 50 is used for driving the first locking block 320 to move towards the first foot pipe 220 to clamp the first foot pipe 220, so as to realize locking.

[0039] Referring to Figure 4 , the first locking block 320 and the first foot pipe 220 are provided with a friction locking block 310, and the friction locking block 310 is used for strengthening friction to ensure friction abutment and improve locking stability.

[0040] Referring to Figure 4 and Figure 5 , the driven assembly 40 comprises a driven block 410 movably arranged in the second mounting cavity 253, the driven rod 70 is connected with the driven block 410, the second mounting cavity 253 is provided with a driving block 420 movably arranged in the second mounting cavity 253, the wall surface of the driving block 420 facing the driven block 410 is provided with a driving inclined block 421, and the wall surface of the driven block 410 facing the driving block 420 is provided with a driven inclined block 411; under the cooperation of the driven inclined block 411 and the driving inclined block 421, the driving block 420 moves back and forth to drive the driven block 410 to move up and down relative to the second mounting cavity 253; the synchronous driving assembly 50 comprises a buckle 510, the buckle 510 is provided with an abutting portion 520 for abutting against the driving block 420, the abutting portion 520 is provided with a connecting bolt 530, and the connecting bolt 530 is fixedly connected with the first locking block 320 by penetrating the second mounting cavity 253 to the first mounting cavity 252.

[0041] When locked, the buckle 510 is in the first position, as shown in Figures 1 to 3 . In this state, the abutting portion 520 abuts against the driving block 420 and moves towards the driven block 410, under the cooperation of the driven inclined block 411 and the driving inclined block 421, the driving block 420 drives the driven block 410 to move upwards to drive the second locking assembly 60 to lock. At the same time, when the buckle 510 is in the first position, it can pull the first locking block 320 to move towards the second mounting cavity 253 under the cooperation of the abutting portion 520 and the driving block 420, so as to abut against the first foot pipe 220 through the first locking block 320 to realize friction locking.

[0042] When unlocked, the buckle 510 is operated to rotate to the state shown in Figure 7 . In this state, the abutting portion 520 and the driving block 420 have a movable space, in this state, the driving block 420 can move away from the driven block 410. At the same time, since the buckle 510 can move back and forth, the first locking block 320 connected with the connecting bolt 530 also has a space to move away from the first foot pipe 220, under the action of the first elastic element, the first locking block 320 releases the abutting locking of the first foot pipe 220.

[0043] Referring to Figure 4 and Figure 5The second installation cavity 253 is provided with a guide 255, the driven block 410 is provided with a first guide slot 412, the guide 255 is movably inserted into the first guide slot 412, and the driven block 410 moves up and down relative to the guide 255; the driving block 420 is provided with a guide hole 422, and the guide 255 is movably inserted into the guide hole 422; the guide 255 is hollow inside and communicates with the first installation cavity 252 and the second installation cavity 253 respectively at front and back.

[0044] Referring to Figure 6 The second locking assembly 60 comprises a conical locking sleeve 610 connected to the lower end of the driven rod 70, a plurality of pipe clamping pieces 620 are arranged in an array along the circumference outside the conical locking sleeve 610, the wall surface of the pipe clamping piece 620 towards the conical locking sleeve 610 is a first conical inclined surface 621, the first conical inclined surface 621 is in abutment with a second conical inclined surface 611 of the conical locking sleeve 610, and the outer wall of the pipe clamping piece 620 is in abutment with the inner wall of the third foot pipe 240; the second foot pipe 230 is provided with a downwardly extending matching pipe piece 80, the driven rod 70 is arranged in the matching pipe piece 80; the upper end surface of the pipe clamping piece 620 is in abutment with the lower end surface of the matching pipe piece 80; the lower end of the conical locking sleeve 610 is provided with a limiting ring 612, and a second elastic element 630 is sleeved on the conical locking sleeve 610 between the limiting ring 612 and the pipe clamping piece 620.

[0045] The locking principle of the second locking assembly 60 is as follows: when the driven block 410 drives the driven rod 70 to move upwards, the conical locking sleeve 610 is simultaneously driven to move upwards, so as to extrude the pipe clamping pieces 620 sleeved outside the conical locking sleeve 610, and the pipe clamping pieces 620 abut against the inner wall of the third foot pipe 240, so as to realize friction locking. When unlocking, the driving block 420 releases the position constraint on the driven block 410, and the driven block 410 can freely move up and down, in this state, the second elastic element 630 releases the stored force to drive the conical locking sleeve 610 to move downwards relative to the pipe clamping pieces 620, so that the pipe clamping pieces 620 have a space to restore the deformation towards the inside, and thus the third foot pipe 240 can move up and down relative to the pipe clamping pieces 620.

[0046] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, structure and operation, therefore can not be understood as the restriction of the utility model, the term "first", "second" is only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0047] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A tripod telescopic locking structure, comprising a holder (10), a plurality of telescopic legs (20) are arranged in a circumferential array on the holder (10), the telescopic leg (20) comprises a connecting seat (210) rotationally connected with the holder (10), two first leg pipes (220) extending downward are arranged at intervals on the connecting seat (210), a second leg pipe (230) is arranged between the two first leg pipes (220), a sliding seat (250) is fixedly connected to the upper end of the second leg pipe (230), the sliding seat (250) is slidingly connected with the first leg pipe (220), and a third leg pipe (240) is movably inserted into the second leg pipe (230); characterized in that first mounting cavities (252) and second mounting cavities (253) are arranged on the front and back of the sliding seat (250) respectively, the first mounting cavity (252) is provided with a first locking assembly (30) for friction locking with the first leg pipe (220); the second mounting cavity (253) is provided with a driven assembly (40) movable up and down relative to the second mounting cavity (253), the second leg pipe (230) and the third leg pipe (240) are inserted with a driven rod (70), the upper end of the second leg pipe (230) and the second mounting cavity (253) are in communication with each other, the driven rod (70) is connected with the driven assembly (40), and the lower end of the driven rod (70) is provided with a second locking assembly (60) for frictionally abutting the inner wall of the third leg pipe (240); the sliding seat (250) is provided with a synchronous driving assembly (50) for driving the first locking assembly (30) and the driven assembly (40) to drive the second locking assembly (60) to be synchronously locked or unlocked.

2. The telescoping locking structure of claim 1, wherein: the sliding seat (250) is provided with leg pipe holes (251) penetrating up and down on the left and right sides, respectively, the first leg pipe (220) is arranged in the leg pipe hole (251), and the first mounting cavity (252) is provided with a communication gap (254) in communication with the leg pipe hole (251); the first locking assembly (30) comprises a first locking block (320) movably arranged in the first mounting cavity (252), and the first locking block (320) is connected with the sliding seat (250) through a first elastic element (350); the synchronous driving assembly (50) is used for driving the first locking block (320) to move towards the first leg pipe (220), and the first locking block (320) and the first leg pipe (220) are in abutment to realize friction locking.

3. The telescoping locking structure of claim 2, wherein: a friction locking block (310) is arranged between the first locking block (320) and the first leg pipe (220).

4. A three-legged folding structure according to claim 2 or 3, wherein: The driven assembly (40) comprises a driven block (410) movably arranged in the second mounting cavity (253), the driven rod (70) is connected with the driven block (410), and the second mounting cavity (253) is provided with a driving block (420) movably arranged in the second mounting cavity (253). The wall surface of the driving block (420) towards the driven block (410) is provided with a driving inclined block (421), and the wall surface of the driven block (410) towards the driving block (420) is provided with a driven inclined block (411). Under the cooperation of the driven inclined block (411) and the driving inclined block (421), the driving block (420) moves forward and backward to drive the driven block (410) to move up and down relative to the second mounting cavity (253). The synchronous driving assembly (50) comprises a buckle (510) provided with an abutting part (520) for abutting against the driving block (420), and the abutting part (520) is provided with a connecting bolt (530) penetrating through the second mounting cavity (253) to the first mounting cavity (252) and fixedly connected with the first locking block (320).

5. A tripod extension locking structure according to claim 4, wherein: The second mounting cavity (253) is provided with a guide piece (255), and the driven block (410) is provided with a first guide groove (412), and the guide piece (255) is movably inserted into the first guide groove (412), and the driven block (410) moves up and down relative to the guide piece (255). The driving block (420) is provided with a guide hole (422), and the guide piece (255) is movably inserted into the guide hole (422). The guide piece (255) is hollow inside and communicates with the first mounting cavity (252) and the second mounting cavity (253) respectively.

6. The telescoping locking structure of claim 1, wherein: The second locking assembly (60) comprises a tapered locking sleeve (610) connected to the lower end of the driven rod (70), and a plurality of pipe clamps (620) are arranged on the outer side of the tapered locking sleeve (610) along the circumference, and the wall surface of the pipe clamps (620) towards the tapered locking sleeve (610) is a first tapered inclined surface (621), and the first tapered inclined surface (621) is matched with a second tapered inclined surface (611) of the tapered locking sleeve (610). The outer wall of the pipe clamp (620) is matched with the inner wall of the third foot pipe (240). The second foot pipe (230) is provided with a matching pipe piece (80) extending downward, and the driven rod (70) penetrates through the matching pipe piece (80). The upper end surface of the pipe clamp (620) is matched with the lower end surface of the matching pipe piece (80). The lower end of the tapered locking sleeve (610) is provided with a limiting ring (612), and the tapered locking sleeve (610) between the limiting ring (612) and the pipe clamp (620) is sleeved with a second elastic element (630).

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