A calandria type distributed support leg and calandria type tripod

Abstract

The application relates to the technical field of photographic auxiliary equipment, in particular to a calandria type distributed supporting leg and a calandria type tripod, which comprises an upper leg part, a middle leg part and a lower leg part. The upper leg part comprises a top base, a bottom base, an upper middle shaft rod and two spaced-apart upper calandria pipes. The two upper calandria pipes are respectively arranged on the two sides of the upper middle shaft rod, the upper ends of the two upper calandria pipes are fixedly connected with the top base, the lower ends of the two upper calandria pipes are fixedly connected with the bottom base, and the upper end and the lower end of the upper middle shaft rod are rotationally connected with the top base and the bottom base respectively. The middle leg part comprises a middle middle shaft rod and two spaced-apart middle calandria pipes. The upper ends and the lower ends of the two middle calandria pipes are respectively provided with upper locking mechanisms and lower locking mechanisms. The calandria type distribution of the supporting leg is realized, the strength and the stability are improved, the service life is further improved, the cost is saved, and the supporting leg is easy to store and carry without being segmented and locked or unlocked.

Description

Technical Field

[0001] This invention relates to the field of photographic auxiliary equipment technology, and in particular to a tubular distributed support leg and a tubular tripod. Background Technology

[0002] Tripods are commonly used in photography and videography, providing stable and level support for photographic equipment. Take a multi-section tubular tripod as an example: multiple hollow tubes of different diameters are nested together to form extendable support legs, with locking mechanisms between the sections to prevent slippage and ensure a secure connection. For example, in the prior art, patent CN209622399U, entitled "A Tripod Support Leg Tube," the support leg tube unit includes a main plug and a support leg tube. A telescopic unit is located between the main plug and the support leg tube to adjust the length of the support leg tube for horizontal adjustment of the tripod. In this structure, the length of each support leg needs to be adjusted in segments, which is inconvenient and inefficient. Furthermore, current tripod support leg telescopic units are single-tube designs, resulting in poor stability and strength, and a short service life. Another example is the tripod disclosed in prior art CN114440094A, which uses a lever locking method. The transmission cam 17 rotates, causing steel balls 5 to extend from the cavity 10. The steel balls 5 pry the lever components 6 on both sides to rotate, thereby locking the legs. This lever locking method is laborious to operate, complex in structure, and costly. Moreover, in this type of tripod, if... Figure 3 As shown, the transmission rod 16 protrudes from the legs in the horizontal direction. External forces can easily touch the protruding transmission rod, causing the transmission components and their connected locking components to loosen. After a period of use, the locking effect becomes poor and the service life is short. Furthermore, because the transmission rod protrudes from the legs, the tripod is bulky when folded up and not easy to carry. Summary of the Invention

[0003] This invention addresses the problems of existing technologies by providing a tubular distribution support leg and a tubular tripod, achieving a tubular distribution of support legs. This overcomes the problems of poor strength and stability of traditional single-tube support legs, improves the strength and stability between the upper, middle, and lower legs, thereby increasing service life, saving costs, and making it easy to store and carry.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] The application provides a calandria type distribution support leg, which comprises an upper leg part, a middle leg part and a lower leg part, the upper leg part comprises a top base, a bottom base, an upper middle shaft rod and two spaced upper calandria pipes, the two upper calandria pipes are respectively located on the two sides of the upper middle shaft rod, the upper ends of the two upper calandria pipes are fixedly connected with the top base, the lower ends of the two upper calandria pipes are fixedly connected with the bottom base, and the upper end and the lower end of the upper middle shaft rod are rotationally connected with the top base and the bottom base respectively.

[0006] The middle leg part comprises a middle middle shaft rod and two spaced middle calandria pipes, the two middle calandria pipes are respectively located on the two sides of the middle middle shaft rod, the upper ends and the lower ends of the two middle calandria pipes are respectively provided with upper locking mechanisms and lower locking mechanisms, and the two middle calandria pipes are slidably arranged in the bottom base and respectively located on the two sides of the upper middle shaft rod.

[0007] The upper middle shaft rod is drivingly connected with the upper locking mechanism, and the upper locking mechanism is used for stopping the upper calandria pipes to prevent relative movement.

[0008] The lower leg part comprises a bottom support seat and two spaced lower calandria pipes arranged on the bottom support seat, and the upper ends of the two lower calandria pipes are slidably arranged in the two middle calandria pipes.

[0009] The upper end of the middle middle shaft rod is slidably arranged in the upper middle shaft rod, and the middle middle shaft rod is drivingly connected with the lower locking mechanism, and the lower locking mechanism is used for stopping the lower calandria pipes to prevent relative movement.

[0010] The lower end of the upper middle shaft rod is provided with a middle shaft connecting piece, the upper end of the middle middle shaft rod is slidably arranged in the upper middle shaft rod after being slidably arranged in the middle shaft connecting piece, and the middle shaft connecting piece is rotationally arranged in the bottom base; in the contraction state, the axes of the two upper calandria pipes, the two middle calandria pipes and the upper middle shaft rod are approximately in a plane.

[0011] The upper locking mechanism comprises an upper locking base, the upper ends of the two middle calandria pipes are fixedly connected with the upper locking base, a first middle shaft hole is arranged in the middle of the upper locking base, upper pipe holes are arranged on the two sides of the upper locking base, and the two upper calandria pipes are slidably arranged in the upper pipe holes respectively.

[0012] The upper brake is rotationally arranged in the first middle shaft hole, first movable grooves are arranged on both sides of the first middle shaft hole, the first middle shaft hole and the upper tube hole are communicated with the first movable grooves, a first push rod is movably arranged in the first movable groove, the first push rod is horizontally movable in the first movable groove, one end of the first push rod is in abutment with the outer wall of the upper brake, and the other end of the first push rod is provided with a first lock block, and the upper middle shaft rod is slidingly arranged in the upper brake.

[0013] When the upper end middle shaft rod rotates, the upper brake is driven to rotate, so that the first lock block is extended into the upper tube hole to abut and lock the upper section of the pipe.

[0014] The first steel ball is arranged between the first push rod and the upper brake, the first steel ball is located at one end of the first movable groove close to the upper brake, and the first steel ball is used for sliding abutment with the first push rod and the upper brake.

[0015] Preferably, the outer periphery of the first push rod is provided with a first return spring, and the two ends of the first return spring are connected with the first push rod and the upper locking base respectively.

[0016] The upper brake is a cam, the cam is arranged in an elliptical shape, and the left and right ends and the front and rear ends of the cam are provided with planar sections.

[0017] The other end of the first push rod is provided with a first screw rod part, the first lock block is provided with a first screw hole corresponding to the first screw rod part, the outer peripheral wall of the first screw rod part is provided with a first external thread, and the first screw hole is provided with a first internal thread matched with the first external thread for thread connection.

[0018] The outer side wall of the first lock block is provided with a first adjusting hole, the outer wall of the upper locking base is provided with first perforations on both sides, the first lock block is exposed to the first perforations, the upper section of the pipe is provided with at least one second perforation, and the first perforation and the second perforation are correspondingly arranged.

[0019] The lower locking mechanism comprises a lower locking base, the lower ends of the two middle sections of the pipe are fixedly connected with the lower locking base, a second middle shaft hole is penetratingly arranged in the middle part of the lower locking base, lower tube holes are arranged on both sides of the lower locking base, and the two lower sections of the pipe are slidingly arranged in the lower tube holes.

[0020] The lower brake is rotationally arranged in the second middle shaft hole, second movable grooves are formed on both sides of the second middle shaft hole, the second middle shaft hole and the lower pipe hole are communicated with the second movable grooves, and the second push rod is movably arranged in the second movable groove.

[0021] When the middle end middle shaft rod rotates, the lower brake is driven to rotate, so that the second lock block extends into the lower pipe hole to abut and lock the lower section of the pipe.

[0022] The second steel ball is arranged between the second push rod and the lower brake, the second steel ball is located at one end of the second movable groove close to the lower brake, and the second steel ball is used for sliding abutment with the second push rod and the lower brake.

[0023] Preferably, the outer periphery of the second push rod is sleeved with a second return spring, and the two ends of the second return spring are connected with the second push rod and the lower locking base respectively.

[0024] The other end of the second push rod is provided with a second screw rod part, the second lock block is provided with a second screw hole corresponding to the second screw rod part, the outer peripheral wall of the second screw rod part is provided with a second external thread, and the second screw hole is provided with a second internal thread matched with the second external thread for thread connection.

[0025] The outer side wall of the second lock block is provided with a second adjusting hole, the outer wall of the lower locking base is provided with a third perforation on both sides, the second lock block is exposed to the third perforation, the lower section of the pipe is provided with at least one fourth perforation, and the third perforation and the fourth perforation are correspondingly arranged.

[0026] The lower brake is a cam, the cam is arranged in an elliptical shape, and the left and right ends and the front and rear ends of the cam are all provided with a flat section.

[0027] The bottom base is provided with a middle pipe hole on both sides, and the two middle section pipes are slidably arranged in the middle pipe hole.

[0028] The application also provides a pipe type tripod, which comprises a triangular base and three pipe type distribution support legs equally spaced on the outer periphery of the triangular base, the top base of the pipe type distribution support leg is rotationally connected with the triangular base, an operation assembly is arranged on the top base, and the operation assembly is used for driving the upper section middle shaft rod to rotate.

[0029] The pipe type tripod further comprises a bottom stabilizing assembly, the bottom stabilizing assembly comprises a bottom central shaft table and three connecting arms equally spaced around the outer periphery of the bottom central shaft table, one end of the connecting arm is rotationally connected with the bottom central shaft table, and the other end of the connecting arm is rotationally connected with the bottom base.

[0030] The present application has the following beneficial effects:

[0031] The pipe type distribution of the supporting leg is realized, the problems of poor strength and poor stability of the traditional single pipe supporting leg are overcome, the strength and stability between the upper leg part, the middle leg part and the lower leg part are improved, the problem of complex locking structure and difficult operation of the prior art is overcome, meanwhile, the problem of easy damage of the original pipe type distribution transmission assembly is overcome, thereby improving the service life, saving the cost and being easy to store and carry. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A structure schematic view of a pipe type distribution supporting leg of embodiment 1.

[0033] Figure 2 Another view structure schematic view of a pipe type distribution supporting leg of embodiment 1.

[0034] Figure 3 A sectional view of a pipe type distribution supporting leg of embodiment 1.

[0035] Figure 4 A structure schematic view of a pipe type distribution supporting leg of embodiment 1. Figure 3 An enlarged view of A.

[0036] Figure 5 An enlarged view of B. Figure 3 An enlarged view of B.

[0037] Figure 6 A structure schematic view of a pipe type distribution supporting leg of embodiment 1.

[0038] Figure 7 A structure schematic view of an upper brake and a lower brake of embodiment 1.

[0039] Figure 8 Another view structure schematic view of an upper brake and a lower brake of embodiment 1.

[0040] Figure 9 A structure exploded view of the cooperation of a first push rod and a first lock block of embodiment 1.

[0041] Figure 10 A structure schematic view of a first lock block of embodiment 1.

[0042] Figure 11 A structure schematic view of a pipe type tripod of embodiment 2.

[0043] Figure 12 Another perspective view of the structure of a tubular tripod of Example 2.

[0044] Figure 13 A structure diagram of the operating assembly of Example 2.

[0045] In Figures 1 to 13 The reference signs in the drawings comprise:

[0046] 1, upper leg; 2, middle leg; 3, lower leg; 4, top base; 5, bottom base; 6, upper middle shaft rod; 7, upper tubular pipe; 8, middle middle shaft rod; 9, middle tubular pipe; 10, bottom support seat; 11, lower tubular pipe; 12, middle shaft connecting piece; 13, upper locking base; 14, first middle shaft hole; 15, upper pipe hole; 16, upper locking piece; 17, first movable slot; 18, first push rod; 19, first locking block; 20, first steel ball; 21, flat section; 22, first screw rod part; 23, first screw hole; 24, first adjusting hole; 25, first through hole; 26, second through hole; 27, lower locking base; 28, second middle shaft hole; 29, lower pipe hole; 30, lower locking piece; 31, second movable slot; 32, second push rod; 33, second locking block; 34, second steel ball; 35, third through hole; 36, fourth through hole; 37, triangular base; 38, operating assembly; 39, bottom middle shaft table; 40, connecting arm; 41, operating base; 42, handle; 43, middle shaft gear; 44, driving gear. DETAILED DESCRIPTION

[0047] For the convenience of those skilled in the art, the present application is further described below in conjunction with the embodiments and the drawings, and the content mentioned in the embodiments is not a limitation on the present application. The present application is described in detail below in conjunction with the drawings.

[0048] Example 1

[0049] This Example 1 provides a tubular distributed support leg, as shown in Figures 1 to 10 Fig. 1, which comprises an upper leg 1, a middle leg 2 and a lower leg 3, the upper leg 1 comprising a top base 4, a bottom base 5, an upper middle shaft rod 6 and two upper tubular pipes 7 arranged at intervals, the two upper tubular pipes 7 being respectively located on both sides of the upper middle shaft rod 6, the upper ends of the two upper tubular pipes 7 being fixedly connected to the top base 4, the lower ends of the two upper tubular pipes 7 being fixedly connected to the bottom base 5, the upper end and the lower end of the upper middle shaft rod 6 being respectively rotatably connected to the top base 4 and the bottom base 5;

[0050] The middle leg part 2 comprises a middle middle shaft 8 and two spaced middle pipes 9, the two middle pipes 9 are respectively located at two sides of the middle middle shaft 8, upper and lower ends of the two middle pipes 9 are respectively provided with upper and lower locking mechanisms, the two middle pipes 9 slide through the bottom base 5 and are respectively located at two sides of the upper middle shaft 6;

[0051] The upper middle shaft 6 is drivingly connected with the upper locking mechanism, the upper locking mechanism is used for stopping the upper middle pipe 7 to prevent relative movement, so as to lock the upper middle pipe 7;

[0052] The lower leg part 3 comprises a bottom support seat 10 and two spaced lower pipes 11 arranged on the bottom support seat 10, upper ends of the two lower pipes 11 are respectively slidably sleeved in the two middle pipes 9, the bottom of the bottom support seat 10 can be provided with a foot nail to be fixed with the ground;

[0053] The upper end of the middle middle shaft 8 is slidably sleeved in the upper middle shaft 6, the middle middle shaft 8 is drivingly connected with the lower locking mechanism, the lower locking mechanism is used for stopping the lower pipe 11 to prevent relative movement, so as to lock the lower pipe 11.

[0054] As shown in Figure 2 The center of the holes of the two spaced upper pipes 7, the two spaced middle pipes 9 and the upper end of the upper middle shaft 6 is approximately located on a straight line, the center of the holes of the two spaced upper pipes 7, the two spaced middle pipes 9 and the lower end of the upper middle shaft 6 is approximately located on a straight line, so that the axes of the two upper pipes 7, the two middle pipes 9 and the upper middle shaft 6 are approximately on a plane when the tripod is in the contracted state.

[0055] Specifically, in the embodiment 1, the middle leg 2 is movable relative to the upper leg, and the lower leg 3 is movable relative to the middle leg 2, so that the length of the support leg is telescopic; and the two upper pipes 7 are respectively located on the two sides of the upper middle shaft 6, the two middle pipes 9 are respectively located on the two sides of the upper middle shaft 6 and are slidably arranged in the bottom base 5, and the upper ends of the two lower pipes 11 are respectively slidably arranged in the two middle pipes 9, so that the support leg of the embodiment 1 is in the form of pipe distribution, the problems of poor strength and stability of the traditional single-pipe support leg are overcome, the strength and stability among the upper leg 1, the middle leg 2 and the lower leg 3 are improved, the service life is prolonged, and the cost is saved; in order to realize the position locking among the upper leg 1, the middle leg 2 and the lower leg 3, the upper middle shaft 6, the middle middle shaft 8, the upper locking mechanism and the lower locking mechanism are further arranged; due to the above distribution, the upper middle shaft 6 and the upper pipe 7 and the middle middle shaft 8 and the middle pipe 9 are also in the form of pipe distribution, so as to ensure the structural strength; after the positions of the upper leg 1, the middle leg 2 and the lower leg 3 are adjusted, the upper middle shaft 6 is rotated, the middle middle shaft 8 is driven to rotate, the upper locking mechanism and the lower locking mechanism are driven to act at the same time, the upper pipe 7 and the lower pipe 11 are locked at the same time, the length of the support leg is fixed, the operation is convenient and simple, the segmented locking or unlocking is not needed, and the user's convenience is improved.

[0056] In the embodiment, the lower end of the upper middle shaft 6 is provided with a middle shaft connecting piece 12, the upper end of the middle middle shaft 8 is slidably arranged in the middle shaft connecting piece 12 and is slidably arranged in the upper middle shaft 6, and the middle shaft connecting piece 12 is rotatably arranged in the bottom base 5; preferably, a bearing is arranged between the middle shaft connecting piece 12 and the bottom base 5. Specifically, the middle middle shaft 8 is coaxially connected with the upper middle shaft 6 through the middle shaft connecting piece 12, so that the upper middle shaft 6 drives the middle middle shaft 8 to rotate when the upper middle shaft 6 rotates, the upper locking mechanism and the lower locking mechanism are driven to lock at the same time, the middle middle shaft 8 can slide relative to the axial direction of the upper middle shaft 6, the telescopic extension between the upper pipe 7 and the middle pipe 9 is facilitated, and the structure design is ingenious.

[0057] In the embodiment, the upper locking mechanism includes an upper locking base 13, the upper ends of the two middle pipes 9 are fixedly connected with the upper locking base 13, a first middle shaft hole 14 is arranged in the middle of the upper locking base 13, upper pipe holes 15 are arranged on the two sides of the upper locking base 13, and the two upper pipes 7 are slidably arranged in the upper pipe holes 15;

[0058] The upper braking member 16 is rotationally arranged in the first middle shaft hole 14, and first movable grooves 17 are formed on both sides of the first middle shaft hole 14. The first middle shaft hole 14 and the upper pipe hole 15 are respectively communicated with the first movable grooves 17. The first movable grooves 17 are movably arranged with first push rods 18, which can move horizontally in the first movable grooves 17. One end of the first push rod 18 abuts against the outer wall of the upper braking member 16, and the other end of the first push rod 18 is provided with a first locking block 19. The upper section middle shaft rod 6 is slidably arranged in the upper braking member 16. The upper braking member 16 is provided with a first connecting hole, and the upper section middle shaft rod 6 is slidably arranged in the first connecting hole. The upper section middle shaft rod 6 is a special-shaped pipe, and the first connecting hole is matched with the upper section middle shaft rod 6, so that the upper section middle shaft rod 6 can only move axially relative to the first connecting hole, and the upper section middle shaft rod 6 and the upper braking member 16 cannot rotate relative to each other.

[0059] When the upper end middle shaft rod rotates, the upper braking member 16 is driven to rotate, so that the first locking block 19 is extended into the upper pipe hole 15 to abut against and lock the upper section pipe 7.

[0060] Specifically, the upper section middle shaft rod 6 rotates to drive the upper locking mechanism to lock the position of the upper section pipe 7. When working, the upper section middle shaft rod 6 rotates to drive the upper braking member 16 to rotate. When the upper braking member 16 pushes the first push rod 18 away from the upper braking member 16, the first locking block 19 is extended into the upper pipe hole 15 to lock the upper section pipe 7 in the upper pipe hole 15. The structure is stable, and the first locking block 19 at the other end of the first push rod 18 is extended out of the upper pipe hole 15 to lock the upper section pipe 7 after the position adjustment of the upper locking base 13 and the upper section pipe 7 is completed. When it is needed to unlock the first locking block 19 and the upper section pipe 7, the upper section middle shaft rod 6 is reversely rotated to drive the first push rod 18 to move towards the upper braking member 16, so that the first locking block 19 is separated from the upper section pipe 7 to achieve unlocking.

[0061] In the embodiment, the first push rod 18 is sleeved with a first reset spring, and the two ends of the first reset spring are respectively connected with the first push rod 18 and the upper locking base 13. Specifically, when the first locking block 19 is pushed out to abut against and lock the upper section pipe 7, the first reset spring is stretched to be deformed. When it is needed to unlock the upper section pipe 7, the upper section middle shaft rod 6 is rotated to drive the upper braking member 16 to rotate. Under the action of the first reset spring, the first push rod 18 is driven to move towards the upper braking member 16, so that the first locking block 19 is separated from the upper section pipe 7 to achieve unlocking.

[0062] Preferably, the outer side wall of the first locking block 19 is provided with a first rubber pad, which can be a rubber pad or a silica gel pad, for abutting friction with the upper section of the pipe 7, thereby locking the position of the upper section of the pipe 7.

[0063] Preferably, a first steel ball 20 is movably arranged between the first push rod 18 and the upper brake 16, and the first steel ball 20 is located at one end of the first movable slot 17 close to the upper brake 16. The first steel ball 20 is used to abut the first push rod 18 and the upper brake 16 to reduce friction therebetween and improve structural strength and stability.

[0064] In this embodiment, the upper brake 16 is a cam, which is arranged in an elliptical shape, and the left and right ends and the front and rear ends of the cam are provided with flat sections 21. Specifically, the first movable slot 17 is arranged horizontally. When the short edge end of the cam abuts one end of the first push rod 18 during rotation of the upper brake 16, the first push rod 18 is driven to move towards the middle of the upper brake 16 under the action of the first return spring, so that the first locking block 19 is retracted into the first movable slot 17, unlocking the upper section of the pipe 7, and facilitating movement of the upper section of the pipe 7 relative to the upper locking base 13. When the long edge end of the cam abuts one end of the first push rod 18, the first push rod 18 is driven to move away from the upper brake 16, so that the first locking block 19 extends from the first movable slot 17 to the upper pipe hole 15 and then abuts and locks the upper section of the pipe through the first locking block 19.

[0065] Further, under the action of the flat section 21, when the flat section 21 of the short edge end of the cam is rotated in place and abuts one end of the first push rod 18, the first locking block 19 remains in the first movable slot 17, avoiding affecting movement of the upper section of the pipe 7 in the upper pipe hole 15. In addition, when the flat section 21 of the long edge end of the cam is rotated in place and one end of the first push rod 18 abuts, one end of the first push rod 18 can remain in a flat abutting state, ensuring good cooperation stability between the cam and the first push rod 18, so that the first push rod 18 can drive the first locking block 19 to abut and lock the upper section of the pipe 7.

[0066] In this embodiment, the other end of the first push rod 18 is provided with a first screw rod portion 22, the first locking block 19 is provided with a first screw hole 23 corresponding to the first screw rod portion 22, the outer peripheral wall of the first screw rod portion 22 is provided with a first external thread, and the first screw hole 23 is provided with a first internal thread for thread connection with the first external thread. Under this arrangement, the first push rod 18 and the first locking block 19 can be screwed to adjust the distance between the other end of the first push rod 18 and the first locking block 19, thereby achieving compensation stroke control of the first locking block 19, which is flexible and convenient to use.

[0067] The outer side wall of the first locking block 19 is provided with a first adjusting hole 24, both sides of the outer wall of the upper locking base 13 are provided with first through holes 25, the first locking block 19 is exposed to the first through holes 25, the upper section pipe 7 is provided with at least one second through hole 26, and the first through holes 25 and the second through holes 26 are correspondingly arranged; the first push rod 18 is movably limited in the first movable slot 17, preferably, the first push rod 18 is a polygonal column, and the inner wall shape of the first movable slot 17 is matched with the first push rod 18, so that the first push rod 18 can only move horizontally in the first movable slot 17. Specifically, a user can use a screwdriver from outside to act on the first adjusting hole 24 of the first locking block 19 after extending into the first through hole 25 and the second through hole 26, and rotate the first locking block 19 relative to the first push rod 18 to adjust the distance between the first locking block 19 and the first push rod 18.

[0068] In the embodiment, the lower locking mechanism includes a lower locking base 27, the lower ends of the two middle section pipes 9 are fixedly connected with the lower locking base 27, the middle part of the lower locking base 27 is provided with a second middle shaft hole 28, both sides of the lower locking base 27 are provided with lower pipe holes 29, and the two lower section pipes 11 are respectively slidably arranged in the lower pipe holes 29.

[0069] The second middle shaft hole 28 is rotatably provided with a lower brake 30, both sides of the second middle shaft hole 28 are provided with second movable slots 31, the second middle shaft hole 28 and the lower pipe hole 29 are respectively communicated with the second movable slots 31, the second movable slots 31 are movably provided with second push rods 32, the second push rods 32 can move horizontally in the second movable slots 31, one end of the second push rod 32 abuts against the outer wall of the lower brake 30, the other end of the second push rod 32 is provided with a second locking block 33, and the middle section middle shaft rod 8 is slidably arranged in the lower brake 30; the lower brake 30 is provided with a second connecting hole, the middle section middle shaft rod 8 is slidably arranged in the second connecting hole; the middle section middle shaft rod 8 is a special-shaped pipe, the second connecting hole is matched with the middle section middle shaft rod 8, so that the middle section middle shaft rod 8 can only move axially relative to the second connecting hole, and the middle section middle shaft rod 8 and the lower brake 30 cannot relatively rotate;

[0070] When the middle end middle shaft rod rotates, the lower brake 30 is driven to rotate, so that the second locking block 33 extends into the lower pipe hole 29 to abut and lock the lower section pipe 11.

[0071] Specifically, the middle section middle shaft rod 8 drives the lower locking mechanism to lock the position of the lower section pipe 11. During operation, the middle section middle shaft rod 8 rotates, driving the lower brake 30 to rotate. When the lower brake 30 pushes the second push rod 32 away from the lower brake 30, the second locking block 33 is pushed into the lower pipe hole 29, thereby locking the lower section pipe 11 in the lower pipe hole 29. The structure is stable, and the position adjustment of the lower locking base 27 and the lower section pipe 11 is completed. Then the second locking block 33 at the other end of the second push rod 32 is extended out of the lower pipe hole 29 to lock the lower section pipe 11. When it is necessary to unlock the second locking block 33 and the lower section pipe 11, the middle section middle shaft rod 8 is reversely rotated to drive the second push rod 32 to move towards the lower brake 30, so that the second locking block 33 is separated from the lower section pipe 11 to achieve unlocking.

[0072] In this embodiment, the second push rod 32 is provided with a second reset spring, and the two ends of the second reset spring are connected with the second push rod 32 and the lower locking base 27 respectively. Specifically, when the second locking block 33 is pushed out to abut and lock the lower section pipe 11 in the lower pipe hole 29, the second reset spring is stretched and deformed. When it is necessary to unlock the lower section pipe 11, the lower brake 30 is rotated by rotating the middle section middle shaft rod, and under the action of the second reset spring, the second push rod 32 is driven to move towards the lower brake 30, so that the second locking block 33 is separated from the lower section pipe 11 to achieve unlocking.

[0073] Preferably, the outer side wall of the second locking block 33 is provided with a second rubber pad, which can be a rubber pad or a silica gel pad, for abutting and rubbing against the lower section pipe 11, thereby locking the position of the lower section pipe 11.

[0074] Preferably, a second steel ball 34 is movably arranged between the second push rod 32 and the lower brake 30. The second steel ball 34 is located at one end of the second movable groove 31 close to the upper brake 16, and is used to abut against the second push rod 32 and the lower brake 30 to reduce the friction therebetween and improve the structural strength and stability.

[0075] In this embodiment, the other end of the second push rod 32 is provided with a second screw rod part, the second locking block 33 is provided with a second screw hole corresponding to the second screw rod part, the outer peripheral wall of the second screw rod part is provided with a second external thread, and the second screw hole is provided with a second internal thread for thread connection with the second external thread. In this arrangement, the second push rod 32 and the second locking block 33 can be screwed, the distance between the other end of the second push rod 32 and the second locking block 33 can be adjusted, and the compensation stroke control of the second locking block 33 can be achieved, which is flexible and convenient to use.

[0076] The outer side wall of the second lock block 33 is provided with a second adjusting hole, both sides of the outer wall of the lower locking base 27 are provided with a third through hole 35, the second lock block 33 is exposed to the third through hole 35, the lower section pipe 11 is provided with at least one fourth through hole 36, and the third through hole 35 and the fourth through hole 36 are correspondingly arranged; wherein the second push rod 32 is left-right movable and limited in the second movable groove 31, preferably, the second push rod 32 is a polygonal column, and the inner wall shape of the second movable groove 31 is matched with the second push rod 32, so that the second push rod 32 can only move horizontally left and right in the second movable groove 31. Specifically, the user can use a screwdriver from the third through hole 35 and the fourth through hole 36 to act on the second adjusting hole of the second lock block 33 outside, rotate the second lock block 33 relative to the second push rod 32, so as to adjust the distance between the second lock block 33 and the second push rod 32.

[0077] In the embodiment, the lower brake 30 is a cam, and the cam is arranged in an elliptical shape. The left and right ends and the front and rear ends of the cam are all provided with a flat section 21.

[0078] Specifically, when the short edge end of the cam abuts against one end of the second push rod 32 during rotation of the lower brake 30, the second push rod 32 is driven to move towards the middle part of the upper brake 16 under the action of the second return spring, so that the second lock block 33 is retracted into the second movable groove 31, the lower section pipe 11 is unlocked, and the lower section pipe 11 can move relative to the lower locking base 27; when the long edge end of the cam abuts against one end of the second push rod 32, the second push rod 32 is driven to move away from the lower brake 30, so that the second lock block 33 is extended from the second movable groove 31 to the lower pipe hole 29 and then abuts against and locks the lower section pipe through the second lock block 33.

[0079] Further, under the action of the flat section 21, when the flat section 21 of the short edge end of the cam is rotated in place and abuts against the two ends of the second push rod 32, the second lock block 33 is kept in the second movable groove 31, so as to avoid affecting the movement of the lower section pipe 11 in the lower pipe hole 29; in addition, when the flat section 21 of the long edge end of the cam is rotated in place and the one end of the second push rod 32 abuts against, the one end of the second push rod 32 can be kept in a flat abutting state, so as to ensure good cooperation stability between the cam and the second push rod 32, and make the second push rod 32 drive the second lock block 33 to keep abutting and locking the lower section pipe 11.

[0080] Preferably, the upper central shaft 6 and the middle central shaft 8 are irregularly shaped tubes, which facilitates the upper central shaft 6 to drive the middle central shaft 8 to rotate synchronously when rotating, and ensures that the middle central shaft 8 can only move axially relative to the upper central shaft 6. There will be no relative rotation between the upper central shaft 6 and the middle central shaft 8, thus ensuring the working stability and reliability of the pipe-type support leg.

[0081] In this embodiment, both sides of the bottom base 5 are provided with central pipe holes, and the two middle pipe sections 9 are slidably inserted through the central pipe holes. Specifically, the above arrangement facilitates the movement of the middle pipe sections 9 relative to the bottom base 5.

[0082] Example 2

[0083] This embodiment 2 also provides a tubular tripod, such as Figures 11 to 13 As shown, the tripod includes a triangular base 37 and three equally spaced tubular support legs distributed around the outer periphery of the triangular base 37. The top base 4 of the tubular support legs is rotatably connected to the triangular base 37. An operating component 38 is provided on the top base 4, which is used to drive the upper central shaft 6 to rotate. Specifically, the above configuration achieves a tubular distribution of the tripod support legs, overcoming the problems of poor strength and stability of traditional single-tube support legs, improving the strength and stability between the upper leg 1, the middle leg 2, and the lower leg 3, thereby increasing the service life. The user can operate the operating component 38 to drive the upper central shaft to rotate forward or backward.

[0084] The operating component 38 includes an operating base 41, a handle 42, and a central shaft gear 43. The operating base 41 is fixed to the top base 4. One end of the handle 42 is rotatably connected to the operating base 41. A drive gear 44 is rotatably disposed inside the operating base 41. The handle 42 is connected to the drive gear 44 via a coupling. The drive gear 44 is meshed with the central shaft gear 43 for transmission. The upper end of the upper central shaft is coaxially connected to the central shaft gear 43.

[0085] In this embodiment, the tubular tripod further includes a bottom stabilizing component, which includes a bottom central support 39 and three connecting arms 40 equally spaced around the bottom central support 39. One end of each connecting arm 40 is rotatably connected to the bottom central support 39, and the other end is rotatably connected to the bottom base 5. Specifically, this configuration improves the stability of the three supporting legs distributed around the triangular base 37, resulting in a reliable structure.

[0086] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application is disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical solution of the present application, can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the present application are within the scope of the technical solution of the present application.

Claims

1. A calandria distributed support leg characterized by: The upper leg section comprises a top base, a bottom base, an upper middle shaft and two spaced upper pipes, the upper pipes are respectively located on both sides of the upper middle shaft, the upper ends of the upper pipes are fixedly connected with the top base, the lower ends of the upper pipes are fixedly connected with the bottom base, the upper and lower ends of the upper middle shaft are rotationally connected with the top base and the bottom base respectively; The middle leg section comprises a middle middle shaft and two spaced middle pipes, the upper and lower ends of the middle pipes are respectively provided with upper and lower locking mechanisms, the middle pipes are slidably arranged in the bottom base and located on both sides of the upper middle shaft; The upper middle shaft is drivingly connected with the upper locking mechanism, the upper locking mechanism is used for stopping the upper pipes to prevent relative movement; The lower leg section comprises a bottom support base and two spaced lower pipes arranged on the bottom support base, the upper ends of the lower pipes are slidably arranged in the middle pipes; The upper end of the middle middle shaft is slidably arranged in the upper middle shaft, the middle middle shaft is drivingly connected with the lower locking mechanism, the lower locking mechanism is used for stopping the lower pipes to prevent relative movement; The upper locking mechanism comprises an upper locking base, the upper ends of the middle pipes are fixedly connected with the upper locking base, a first middle hole is formed in the middle of the upper locking base, upper pipe holes are formed in both sides of the upper locking base, the upper pipes are slidably arranged in the upper pipe holes; An upper stopper is rotationally arranged in the first middle hole, first movable grooves are formed in both sides of the first middle hole, the first middle hole and the upper pipe holes are communicated with the first movable grooves, a first push rod is movably arranged in the first movable grooves, the first push rod is horizontally movable in the first movable grooves, one end of the first push rod is abutted with the outer wall of the upper stopper, the other end of the first push rod is provided with a first locking block, the upper middle shaft is slidably arranged in the upper stopper; When the upper middle shaft rotates, the upper stopper is driven to rotate, the first locking block is extended into the upper pipe hole to abut and lock the upper pipes; The other end of the first push rod is provided with a first screw portion, the first locking block is provided with a first screw hole corresponding to the first screw portion, the outer circumferential wall of the first screw portion is provided with a first external thread, the first screw hole is provided with a first internal thread matched with the first external thread for screw connection; The outer side wall of the first locking block is provided with a first adjusting hole, the outer wall of the upper locking base is provided with first through holes on both sides, the first locking block is exposed from the first through holes, the upper pipes are provided with at least one second through hole, the first through hole and the second through hole are correspondingly arranged. The first push rod is a polygonal column, and the inner wall shape of the first movable slot is matched with the first push rod, so that the first push rod can only move horizontally left and right in the first movable slot. The lower locking mechanism comprises a lower locking base, the lower ends of the two middle segment pipes are fixedly connected with the lower locking base, a second middle shaft hole is arranged in the middle of the lower locking base, and lower pipe holes are arranged on the two sides of the lower locking base; the two lower segment pipes are respectively slidably arranged in the lower pipe holes. A lower brake is rotatably arranged in the second middle shaft hole, second movable slots are formed on the two sides of the second middle shaft hole, the second middle shaft hole and the lower pipe hole are communicated with the second movable slots, a second push rod is movably arranged in the second movable slot, the second push rod can move horizontally in the second movable slot, one end of the second push rod is in abutment with the outer wall of the lower brake, and the other end of the second push rod is provided with a second lock block. When the middle segment middle shaft rod rotates, the lower brake is driven to rotate, so that the second lock block extends into the lower pipe hole to abut and lock the lower segment pipe. The other end of the second push rod is provided with a second screw rod part, the second lock block is provided with a second screw hole corresponding to the second screw rod part, the outer circumferential wall of the second screw rod part is provided with a second external thread, and the second screw hole is provided with a second internal thread matched with the second external thread for threaded connection. The outer side wall of the second lock block is provided with a second adjusting hole, the outer wall of the lower locking base is provided with a third perforation on the two sides, the second lock block is exposed to the third perforation, the lower segment pipe is provided with at least one fourth perforation, and the third perforation and the fourth perforation are correspondingly arranged. The second push rod is a polygonal column, and the inner wall shape of the second movable slot is matched with the second push rod, so that the second push rod can only move horizontally left and right in the second movable slot.

2. A calandria support leg according to claim 1, wherein: The lower end of the upper segment middle shaft rod is provided with a middle shaft connecting piece, the upper end of the middle segment middle shaft rod is slidably arranged in the middle shaft connecting piece and then slidably arranged in the upper segment middle shaft rod, and the middle shaft connecting piece is rotatably arranged in the bottom base; in the retracted state, the axes of the two upper segment pipes, the two middle segment pipes and the upper segment middle shaft rod are approximately on a plane.

3. A calandria support leg according to claim 1, wherein: A first steel ball is movably arranged between the first push rod and the upper brake, the first steel ball is located at one end of the first movable slot close to the upper brake, and the first steel ball is used for sliding abutment with the first push rod and the upper brake.

4. A calandria support leg according to claim 1, wherein: The upper brake is a cam, the cam is arranged in an elliptical shape, and the left and right ends and the front and rear ends of the cam are all provided with planar sections.

5. A calandria support leg according to claim 1 wherein: A second steel ball is movably arranged between the second push rod and the lower brake, the second steel ball is located at one end of the second movable slot close to the lower brake, and the second steel ball is used for sliding abutment with the second push rod and the lower brake.

6. A nested tripod characterized by: The triangular base and three equidistantly distributed pipe distribution support legs as claimed in any one of claims 1-5 are arranged on the outer periphery of the triangular base, the top base of the pipe distribution support legs is rotationally connected with the triangular base, and an operating assembly is arranged on the top base, the operating assembly being used to drive the upper segment central shaft to rotate.

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