Telescopic assembly and camera support

Abstract

The telescopic assembly comprises at least three connecting pipes and a control mechanism, all the connecting pipes are sequentially arranged in a sleeved mode from top to bottom, and the control mechanism is in transmission connection with a linkage shaft; in every two adjacent connecting pipes, a pipe base is installed at the upper end of the connecting pipe located on the inner side, an installing hole is formed in the pipe base in the vertical direction, a sliding hole communicated with the installing hole is formed in the periphery of the pipe base, a locking piece is slidably installed in the sliding hole, the locking piece is connected with a shifting piece, and a driving piece is rotatably installed in the installing hole. Driving parts are arranged on the peripheries of the driving pieces in a protruding mode, driving holes are formed in the driving parts, the stirring pieces are inserted into the driving holes, all the driving pieces and the linkage shaft are sequentially arranged in a sleeving mode from bottom to top, and the linkage shaft can drive all the driving pieces to synchronously rotate relative to the connecting pipe. According to the telescopic assembly, all the connecting pipes can be unlocked or locked at the same time through the control mechanism, and the length of the telescopic assembly can be adjusted conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of photographic equipment, in particular to a telescopic component and a photographic bracket. Background Art

[0002] In a photographic stand, there are usually some telescopic components that can be telescopically adjusted in length. For example, the three supporting legs of a tripod are usually made into telescopic components to adjust the length. These telescopic components usually include three connecting tubes nested in sequence, and two adjacent connecting tubes can slide relative to each other to achieve telescopic adjustment of the overall length of the supporting legs. In a conventional telescopic component of a photographic stand, two adjacent connecting tubes are generally tightened and locked by a knob. When adjusting the length of the telescopic component, the knob needs to be rotated multiple times to unlock or lock, which is inconvenient to adjust. 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 telescopic assembly, which can simultaneously unlock or lock all connecting pipes through an operating mechanism, so as to facilitate the adjustment of the length of the telescopic assembly.

[0004] The utility model also provides a photographic bracket with the telescopic assembly.

[0005] According to a telescopic assembly of the first aspect of the utility model, the embodiment comprises at least three connecting tubes and an operating mechanism, all of the connecting tubes are sequentially sleeved in order from top to bottom, and among two adjacent connecting tubes, the lower end of the connecting tube located on the inner side can slide and telescope relative to the connecting tube located on the outer side; the operating mechanism is installed at the upper end of the connecting tube located on the outermost side, the operating mechanism is transmission-connected with a linkage shaft, the linkage shaft is penetrated by the connecting tube, and the operating mechanism can drive the linkage shaft to rotate; among two adjacent connecting tubes, the upper end of the connecting tube located on the inner side is installed with a tube seat, the tube seat is provided with a mounting hole in the up-and-down direction, the outer periphery of the tube seat is provided with a sliding hole connected with the mounting hole, a locking piece is slidably installed in the sliding hole, and the locking piece is connected with a toggle piece , a driving member is rotatably installed in the mounting hole, a driving part is protruding from the outer periphery of the driving member, the driving part is provided with a driving hole, the toggle member is inserted into the driving hole, and a first limiting structure for limiting the relative sliding of the two in the up and down directions is provided between the connecting tube and the driving member located on the inner side, and when the driving member rotates relative to the tube seat, the side wall of the driving hole can drive the corresponding toggle member to drive the corresponding locking member to move close to lock the connecting tube located on the outside or move away to release the connecting tube located on the outside; wherein, all the driving members and the linkage shaft are sequentially sleeved in order from bottom to top, and the linkage shaft can drive all the driving members to rotate synchronously relative to the connecting tube, and all the locking members synchronously lock or release the corresponding connecting tube.

[0006] The telescopic assembly according to the embodiment of the utility model has at least the following beneficial effects: through the above-mentioned arrangement, when the operating mechanism drives the linkage shaft to rotate, all the driving members can be driven to rotate synchronously relative to the connecting tube through the linkage shaft, so that all the locking members can synchronously lock or release the corresponding connecting tubes. Therefore, the telescopic assembly provided by the utility model can unlock or lock all the connecting tubes at the same time through the operating mechanism, thereby achieving quick locking or unlocking and facilitating the adjustment of the length of the telescopic assembly.

[0007] According to some embodiments of the present invention, the drive hole extends around the rotation axis of the drive member, and the distance between one end of the drive hole and the rotation axis of the drive member is smaller than the distance between the other end of the drive hole and the rotation axis of the drive member.

[0008] According to some embodiments of the utility model, at least two sliding holes are evenly arranged on the outer circumference of each tube seat, the driving part is located on the upper side of the corresponding tube seat, and the driving part is provided with at least two driving holes evenly distributed around the circumference.

[0009] According to some embodiments of the utility model, a linkage hole extending from top to bottom is provided on the upper surface of each of the driving members, and the linkage hole is a non-circular hole. The linkage shaft is inserted into the linkage hole of an adjacent driving member, and the outer contour of the linkage shaft matches the shape of the linkage hole of the adjacent driving member. Among the two adjacent driving members, the lower end of the driving member located above is inserted into the linkage hole of the driving member located below, and the outer contour of the lower end of the driving member located above matches the shape of the linkage hole of the driving member located below.

[0010] According to some embodiments of the utility model, the first limiting structure includes a limiting protrusion and a limiting groove, one of the limiting protrusion and the limiting groove is arranged on the locking member, and the other is arranged on the corresponding driving member, the limiting protrusion is inserted into the corresponding limiting groove, and the length of the limiting protrusion inserted into the limiting groove is greater than the sliding range of the corresponding locking member in the corresponding sliding hole.

[0011] According to some embodiments of the present invention, a non-slip pad is provided on a surface of a side of the locking member facing away from the driving member.

[0012] According to some embodiments of the utility model, a safety device is provided on the operating mechanism, and the safety device can limit or unlock the operating mechanism, wherein when the locking member locks the corresponding connecting pipe, the safety device limits the operation of the operating mechanism.

[0013] According to some embodiments of the utility model, the operating mechanism includes a mounting seat and an operating member, the mounting seat is installed at the upper end of the connecting tube located at the outermost side, one end of the operating member is rotatably installed on the mounting seat, the rotation axis of the operating member is along the up and down direction, the linkage shaft is rotatably installed on the mounting seat, the linkage shaft is transmission connected with the operating member, the safety device is arranged on the mounting seat, wherein the operating member has a first position and a second position, when the operating member is in the first position, the locking member locks the corresponding connecting tube, the safety device is clamped with the operating member, after the safety device releases the clamping of the operating member, the operating member can rotate from the first position to the second position, when the operating member is in the second position, the locking member releases the corresponding connecting tube.

[0014] According to some embodiments of the utility model, the safety device includes a slider, which is slidably arranged on the outer periphery of the mounting seat, a buckle is arranged at one end of the slider, and a clamping hole is arranged on the operating member, when the operating member is in the first position, the slider is inserted into the clamping hole, and the buckle is clamped with the side wall of the clamping hole, wherein a reset structure is arranged between the slider and the mounting seat, and a guide surface is arranged at one end of the slider, when the operating member rotates from the second position to the first position, the side wall of the clamping hole and the guide surface cooperate with each other to push the slider to avoid the side wall of the clamping hole, and after the slider is inserted into the clamping hole, the reset structure drives the buckle to clamp with the side wall of the clamping hole.

[0015] A photographic bracket according to a second aspect of the present invention includes the telescopic assembly described above.

[0016] A photographic bracket according to the second aspect of the present invention has at least the following beneficial effects: the telescopic component of the photographic bracket can simultaneously unlock or lock all the connecting tubes through the operating mechanism, thereby facilitating the adjustment of the length of the telescopic component.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 A schematic diagram of a telescopic assembly according to an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the internal structure of a telescopic assembly is shown;

[0021] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0022] Figure 4 An exploded view of a telescopic assembly shown in 1;

[0023] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0024] Figure 6 for Figure 1 An exploded view of a telescopic assembly at a control mechanism is shown;

[0025] Figure 7 for Figure 2 Cross-sectional view at section BB.

[0026] Reference numerals:

[0027] Connecting pipe 100, operating mechanism 200, mounting seat 210, mounting groove 211, pin shaft 212, operating member 220, snap-fit ​​hole 221, gear transmission assembly 230, linkage shaft 300, pipe seat 410, mounting hole 411, sliding hole 412, locking member 420, plug hole 421, limiting groove 422, toggle member 430, driving member 440, rotating sleeve 440a, sleeve rod 440b, driving part 441, driving hole 442, linkage hole 443, limiting protrusion 444, anti-slip pad 450, safety device 500, slider 510, buckle 511, guide surface 512, reset structure 520. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Reference Figures 1 to 4According to the first embodiment of the utility model, a telescopic assembly includes at least three connecting tubes 100 and an operating mechanism 200. All the connecting tubes 100 are sequentially sleeved from top to bottom. Among two adjacent connecting tubes 100, the lower end of the connecting tube 100 located on the inner side can slide and telescope relative to the connecting tube 100 located on the outer side; the operating mechanism 200 is installed at the upper end of the connecting tube 100 located on the outermost side, and the operating mechanism 200 is transmission-connected with a linkage shaft 300, which is penetrated by the connecting tube 100. The operating mechanism 200 The linkage shaft 300 can be driven to rotate; among the two adjacent connecting tubes 100, a tube seat 410 is installed at the upper end of the inner connecting tube 100, and a mounting hole 411 is provided in the tube seat 410 along the up-down direction. A sliding hole 412 connected to the mounting hole 411 is provided on the outer periphery of the tube seat 410, and a locking member 420 is slidably installed in the sliding hole 412, and the locking member 420 is connected to a toggle member 430, and a driving member 440 is rotatably installed in the mounting hole 411, and a driving part 441 is protruding from the outer periphery of the driving member 440, and the driving part 441 is provided with a driving hole 442, the toggle member 430 is inserted into the driving hole 442, and a first limit structure for limiting the relative sliding of the two in the up and down directions is provided between the inner connecting tube 100 and the driving member 440, so that during the telescopic assembly, the inner connecting tube 100 and the corresponding driving member 440 move up and down synchronously, and when the driving member 440 rotates relative to the tube seat 410, the side wall of the driving hole 442 can drive the corresponding toggle member 430 to drive the corresponding locking member 420 to move closer to the locking connecting tube 100 located on the outside or move away The connecting tube 100 located on the outside is released; wherein all the driving members 440 and the linkage shaft 300 are sequentially sleeved in an order from bottom to top, so that the telescopic structure composed of the linkage shaft 300 and all the driving members 440 can be synchronously extended and retracted with the telescopic structure composed of all the connecting tubes 100; the linkage shaft 300 can drive all the driving members 440 to rotate synchronously relative to the connecting tube 100, thereby, all the locking members 420 can rotate synchronously, and then all the locking members 420 can be synchronously locked or released The corresponding connecting tubes 100.

[0033] Through the above arrangement, when the operating mechanism 200 drives the linkage shaft 300 to rotate, all the driving members 440 can be driven to rotate synchronously relative to the connecting tube 100 through the linkage shaft 300, so that all the locking members 420 can synchronously lock or release the corresponding connecting tubes 100. Therefore, the telescopic assembly provided by the utility model can unlock or lock all the connecting tubes 100 at the same time through the operating mechanism 200, thereby achieving quick locking or unlocking and facilitating the adjustment of the length of the telescopic assembly.

[0034] Reference Figure 4 and Figure 5According to some embodiments of the present invention, the driving hole 442 extends around the rotation axis of the driving member 440. Specifically, the driving hole 442 can extend along a spiral line. Of course, the driving hole 442 can also extend along an arc line or a straight line. Therefore, the distance between one end of the driving hole 442 and the rotation axis of the driving member 440 is smaller than the distance between the other end of the driving hole 442 and the rotation axis of the driving member 440. Therefore, when the driving member 440 rotates in the locking direction, the inner wall of the driving hole 442 can push the toggle member 430 to move outward so that the locking member 420 moves close to the corresponding connecting pipe 100 for locking. When the driving member 440 rotates in the unlocking direction, the inner wall of the driving hole 442 can push the toggle member 430 to move inward so that the locking member 420 moves away from the corresponding connecting pipe 100 for releasing.

[0035] Reference Figure 5 According to some embodiments of the utility model, three sliding holes 412 are evenly arranged on the outer circumference of each tube seat 410, the driving part 441 is located on the upper side of the corresponding tube seat 410, the driving part 441 is disc-shaped, and three driving holes 442 evenly distributed on the circumference are provided on the driving part 441. Through the above arrangement, each tube seat 410 can lock the corresponding connecting pipe 100 through three evenly distributed locking members 420, and the locking is more secure.

[0036] It should be noted that, in other embodiments, two, four or more sliding holes 412 may be provided on the tube seat 410, the number of driving parts 441 on the driving member 440 may be set to one, and then the driving part 441 may be provided with driving holes 442 having the same number as the sliding holes 412, or, the driving part 441 may be provided with the same number as the sliding holes 412, each driving part 441 may be provided with a driving hole 442, and all driving holes 442 on each driving member 440 may be evenly distributed circumferentially.

[0037] Reference Figures 3 to 5According to some embodiments of the present invention, a linkage hole 443 extending from top to bottom is formed on the upper surface of each driving member 440, and the linkage hole 443 is a non-circular hole of a polygonal, semicircular, elliptical or other shape. The linkage shaft 300 is inserted into the linkage hole 443 of an adjacent driving member 440, and the outer contour of the linkage shaft 300 matches the shape of the linkage hole 443 of the adjacent driving member 440. Among the two adjacent driving members 440, the lower end of the driving member 440 located above is inserted into the linkage hole 443 of the driving member 440 located below, and the outer contour of the lower end of the driving member 440 located above matches the shape of the linkage hole 443 of the driving member 440 located below. Through the above arrangement, the linkage shaft 300 and the adjacent driving members 440 can slide and retract relative to each other, and the two opposite driving members 440 can also slide and retract relative to each other, and under the restriction of the inner wall of the non-circular linkage hole 443, the linkage shaft 300 can drive all the driving members 440 to rotate synchronously.

[0038] Reference Figure 2 , Figure 3 , Figure 5 In the specific implementation process, of the two adjacent driving members 440, the driving member 440 located at the top includes a rotating sleeve 440a and a non-circular sleeve rod 440b, the sleeve rod 440b is connected to the rotating sleeve 440a, and the lower end of the sleeve rod 440b protrudes from the rotating sleeve 440a, the linkage hole 443 extends from the rotating sleeve 440a to the sleeve rod 440b, and the rotating sleeve 440a is rotatably installed in the installation hole 411 of the pipe seat 410, wherein the sleeve rod 440b located at the top is inserted into the linkage hole 443 of the driving member 440 located at the bottom.

[0039] It should be noted that, in other embodiments, other settings may also be adopted to achieve the synchronous rotation of the linkage shaft 300 to drive all the driving members 440. For example, the above-mentioned linkage hole 443 can be set as a circular hole, and the side wall of the linkage hole 443 is provided with a strip-shaped limiting hole. The lower ends of the linkage shaft 300 and the driving member 440 are provided with limiting columns, and the limiting columns are inserted into the corresponding strip-shaped limiting holes.

[0040] Reference Figure 3 and Figure 5According to some embodiments of the present invention, the first limiting structure includes a limiting protrusion 444 and a limiting groove 422, one of the limiting protrusion 444 and the limiting groove 422 is set on the locking member 420, and the other is set on the corresponding driving member 440, the limiting protrusion 444 is inserted into the corresponding limiting groove 422, and the length of the limiting protrusion 444 inserted into the limiting groove 422 is greater than the sliding range of the corresponding locking member 420 in the corresponding sliding hole 412. Therefore, during the assembly process, the driving member 440 can be installed in the mounting hole 411 of the tube seat 410, and then the locking member is inserted into the sliding hole 412, and the first limiting structure between the locking member and the driving member 440 can be used to limit the driving member 440 in the mounting hole 411, thereby assembling the driving member 440 is more convenient.

[0041] Reference Figure 3 and Figure 5 It is conceivable that, in some embodiments, the locking member 420 is provided with an insertion hole 421, and the toggle member 430 is inserted into the insertion hole 421, wherein the toggle member 430 can be fixed to the locking member 420 by means of threads, pins, etc. Through the above arrangement, during the assembly process, the tube seat 410 can first be installed with the driving member 440 and the locking member 420, and then the toggle member 430 can be installed on the corresponding locking member 420, so that the assembly can be convenient.

[0042] It should be noted that the above-mentioned first limiting structure can also be set in other ways. For example, the first limiting structure includes a pressure cover connected to the tube seat 410 by bolts, and the pressure cover is annular. Therefore, the corresponding driving member 440 can be limited in the corresponding mounting hole 411 by the pressure cover.

[0043] Reference Figure 3 and Figure 5 According to some embodiments of the present invention, a non-slip pad 450 is provided on the surface of the locking member 420 facing away from the driving member 440 to enhance the locking ability of the locking member 420 and improve the ability of the entire telescopic assembly to withstand axial pressure.

[0044] Reference Figure 4 , Figure 6 and Figure 7 According to some embodiments of the present invention, a safety device 500 is provided on the operating mechanism 200, and the safety device 500 can limit or unlock the operating mechanism 200, wherein when the locking member 420 locks the corresponding connecting pipe 100, the safety device 500 limits the operation of the operating mechanism 200. By setting the safety device 500, the situation in which the user or foreign objects accidentally touch the operating mechanism 200 and cause the telescopic component to be unlocked is effectively reduced.

[0045] Refer to 4. Figure 6 and Figure 7According to some embodiments of the present utility model, the operating mechanism 200 includes a mounting seat 210 and an operating member 220, the mounting seat 210 is installed at the upper end of the outermost connecting pipe 100, one end of the operating member 220 is rotatably installed on the mounting seat 210, the rotation axis of the operating member 220 is along the up and down direction, the linkage shaft 300 is rotatably installed on the mounting seat 210, the linkage shaft 300 is transmission-connected with the operating member 220, and the safety device 500 is arranged on the mounting seat 210, wherein the operating member 220 has a first position and a second position, when the operating member 220 is in the first position, the locking member 420 locks the corresponding connecting pipe 100, the safety device 500 is clamped with the operating member 220, after the safety device 500 releases the clamping of the operating member 220, the operating member 220 can rotate from the first position to the second position, when the operating member 220 is in the second position, the locking member 420 releases the corresponding connecting pipe 100. Through the above arrangement, when the operating member 220 is rotated from the second position to the first position, the linkage shaft 300 can be driven to drive all the driving members 440 to rotate in the locking direction, so that all the locking members 420 can synchronously lock the corresponding connecting pipes 100. After the locking is completed, the safety device 500 is engaged with the operating member 220, thereby preventing the user or foreign objects from accidentally pushing the operating member 220 to rotate and causing the telescopic assembly to be unlocked; when the connecting pipe 100 needs to be unlocked, the engagement between the safety device 500 and the operating member 220 is first released, and then the operating member 220 is rotated from the first position to the second position, thereby allowing all the locking members 420 to synchronously release the corresponding connecting pipes 100.

[0046] Refer to 4. Figure 6 and Figure 7 According to some embodiments of the present invention, the safety device 500 includes a slider 510, which is slidably arranged on the outer periphery of the mounting seat 210, a buckle 511 is arranged at one end of the slider 510, and a clamping hole 221 is arranged on the operating member 220. When the operating member 220 is in the first position, the slider 510 is inserted into the clamping hole 221, and the buckle 511 is clamped with the side wall of the clamping hole 221, wherein a reset structure 520 is arranged between the slider 510 and the mounting seat 210, and a guide surface 512 is arranged at one end of the slider 510. When the operating member 220 rotates from the second position to the first position, the side wall of the engaging hole 221 cooperates with the guide surface 512 to push the slider 510 away from the side wall of the engaging hole 221. After the slider 510 is inserted into the engaging hole 221, the reset structure 520 drives the buckle 511 to engage with the side wall of the engaging hole 221. Through the above arrangement, when the operating member rotates from the second position to the first position, the slider 510 can be automatically inserted into the engaging hole 221 and the buckle 511 can be engaged with the side wall of the engaging hole 221. No additional operation is required, and it is easy to use. When the safety device 500 needs to be unlocked, the engagement between the buckle 511 and the side wall of the engaging hole 221 can be released by simply pushing the slider 510.

[0047] In the specific implementation process, the mounting seat 210 is provided with a mounting groove 211, the mounting groove 211 is penetrated by a pin shaft 212, the pin shaft 212 is penetrated by the slider 510, and the reset structure 520 includes a spring sleeved on the pin shaft 212, so that the slider 510 can slide along the pin shaft 212.

[0048] It should be noted that the above-mentioned safety device 500 can also be arranged in other ways. For example, the above-mentioned slider 510 can be replaced by an elastic buckle, and the elastic buckle is also provided with the above-mentioned guide surface 512. Therefore, when the operating member 220 rotates from the second position to the first position, the side wall of the locking hole 221 and the guide surface 512 cooperate with each other to push the elastic buckle open. After the elastic buckle is inserted into the locking hole 221, the elastic buckle automatically locks with the side wall of the locking hole 221 under the action of its own elastic force.

[0049] Reference Figure 6 In the specific implementation process, the rotation axis of the operating member 220 is along the up-down direction, and the operating member 220 and the linkage shaft 300 are transmitted through the gear transmission assembly 230.

[0050] It should be noted that the above-mentioned operating mechanism 200 can also be arranged in other ways. For example, the above-mentioned operating member can be replaced by a worm gear, the rotation axis of the worm gear is perpendicular to the linkage shaft 300, and a turbine is provided on the linkage shaft 300. The turbine is connected to the worm gear, and the worm gear is connected to a knob to facilitate the rotation of the worm gear.

[0051] According to the second embodiment of the present invention, a photographic support (not shown) includes the telescopic assembly described above. Through the above arrangement, the telescopic assembly of the photographic support can simultaneously unlock or lock all the connecting tubes 100 through the operating mechanism 200, so as to facilitate the adjustment of the length of the telescopic assembly.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A telescopic assembly, characterized in that: include: At least three connecting tubes (100), all the connecting tubes (100) are sequentially sleeved in a top-down order, and the lower end of the connecting tube (100) located on the inner side of two adjacent connecting tubes (100) can slide and retract relative to the connecting tube (100) located on the outer side; The operating mechanism (200) is installed at the upper end of the outermost connecting tube (100), the operating mechanism (200) is drivingly connected to a linkage shaft (300), the linkage shaft (300) passes through the connecting tube (100), and the operating mechanism (200) can drive the linkage shaft (300) to rotate; In two adjacent connecting tubes (100), a tube seat (410) is installed at the upper end of the connecting tube (100) located on the inner side, and a mounting hole (411) is provided on the tube seat (410) along the up-down direction. A sliding hole (412) connected to the mounting hole (411) is provided on the outer periphery of the tube seat (410), and a locking member (420) is slidably installed in the sliding hole (412), and the locking member (420) is connected to a toggle member (430). A driving member (440) is rotatably installed in the mounting hole (411), and a driving portion (441) is protruding from the outer periphery of the driving member (440). The part (441) is provided with a driving hole (442), the toggle member (430) is inserted into the driving hole (442), and a first limiting structure for limiting the relative sliding of the two in the up-down direction is provided between the connecting tube (100) located on the inner side and the driving member (440), and when the driving member (440) rotates relative to the tube seat (410), the side wall of the driving hole (442) can drive the corresponding toggle member (430) to drive the corresponding locking member (420) to move closer to lock the connecting tube (100) located on the outer side, or move away from the connecting tube (100) located on the outer side to release the connecting tube (100); Among them, all the driving members (440) and the linkage shaft (300) are arranged in sequence from bottom to top, and the linkage shaft (300) can drive all the driving members (440) to rotate synchronously relative to the connecting tube (100), so that all the locking members (420) can synchronously lock or release the corresponding connecting tube (100).

2. A telescopic assembly according to claim 1, characterized in that: The driving hole (442) extends around the rotation axis of the driving member (440), and the distance between one end of the driving hole (442) and the rotation axis of the driving member (440) is smaller than the distance between the other end of the driving hole (442) and the rotation axis of the driving member (440).

3. A telescopic assembly according to claim 1, characterized in that: At least two sliding holes (412) are evenly arranged on the outer circumference of each tube seat (410); the driving portion (441) is located on the upper side of the corresponding tube seat (410); and the driving portion (441) is provided with at least two driving holes (442) evenly distributed on the circumference.

4. A telescopic assembly according to claim 1, characterized in that: The upper surface of each driving member (440) is provided with a linkage hole (443) extending from top to bottom, and the linkage hole (443) is a non-circular hole. The linkage shaft (300) is inserted into the linkage hole (443) of the adjacent driving member (440), and the outer contour of the linkage shaft (300) matches the shape of the linkage hole (443) of the adjacent driving member (440). Among the two adjacent driving members (440), the lower end of the driving member (440) located above is inserted into the linkage hole (443) of the driving member (440) located below, and the outer contour of the lower end of the driving member (440) located above matches the shape of the linkage hole (443) of the driving member (440) located below.

5. The telescopic assembly according to claim 1, characterized in that: The first limiting structure includes a limiting protrusion (444) and a limiting groove (422), one of the limiting protrusion (444) and the limiting groove (422) is arranged on the locking member (420), and the other is arranged on the corresponding driving member (440), the limiting protrusion (444) is inserted into the corresponding limiting groove (422), and the length of the limiting protrusion (444) inserted into the limiting groove (422) is greater than the sliding range of the corresponding locking member (420) in the corresponding sliding hole (412).

6. A telescopic assembly according to claim 1, characterized in that: A non-slip pad (450) is provided on a surface of one side of the locking member (420) facing away from the driving member (440).

7. The telescopic assembly according to claim 1, characterized in that: The operating mechanism (200) is provided with a safety device (500), and the safety device (500) is capable of limiting or unlocking the operating mechanism (200), wherein when the locking member (420) locks the corresponding connecting pipe (100), the safety device (500) limits the operation of the operating mechanism (200).

8. A telescopic assembly according to claim 7, characterized in that: The operating mechanism (200) comprises a mounting seat (210) and an operating member (220), wherein the mounting seat (210) is mounted on the upper end of the outermost connecting tube (100), one end of the operating member (220) is rotatably mounted on the mounting seat (210), the linkage shaft (300) is rotatably mounted on the mounting seat (210), the linkage shaft (300) is transmission-connected to the operating member (220), the safety device (500) is arranged on the mounting seat (210), and the operating member (220) The invention has a first position and a second position. When the operating member (220) is in the first position, the locking member (420) locks the corresponding connecting tube (100), and the safety device (500) is engaged with the operating member (220). After the safety device (500) releases the engagement with the operating member (220), the operating member (220) can be rotated from the first position to the second position. When the operating member (220) is in the second position, the locking member (420) releases the corresponding connecting tube (100).

9. A telescopic assembly according to claim 8, characterized in that: The safety device (500) comprises a slider (510), the slider (510) being slidably arranged on the outer periphery of the mounting seat (210), a buckle (511) being arranged at one end of the slider (510), a clamping hole (221) being arranged on the operating member (220), and when the operating member (220) is in a first position, the slider (510) is inserted into the clamping hole (221), and the buckle (511) is clamped with a side wall of the clamping hole (221), wherein the slider (510) is in contact with the mounting seat (210). 0), a reset structure (520) is arranged between the slider (510) and the second position, a guide surface (512) is arranged at one end of the slider (510), when the operating member (220) rotates from the second position to the first position, the side wall of the engaging hole (221) and the guide surface (512) cooperate with each other to push the slider (510) to avoid the side wall of the engaging hole (221), after the slider (510) is inserted into the engaging hole (221), the reset structure (520) drives the buckle (511) to engage with the side wall of the engaging hole (221).

10. A photographic stand, characterized in that: The telescopic assembly comprises the telescopic assembly according to any one of claims 1 to 9.

Images