Portable tripod

Abstract

The application discloses a portable tripod, comprising a connecting assembly, first to third supporting legs and a central shaft pipe. Each of the supporting legs is internally embedded with at least one supporting foot. The first to third supporting legs and the supporting feet embedded therein can be folded inward to form a compact hollow columnar body. In some embodiments, the central section of the supporting legs is in the shape of a hollow ring with a ratio of 1:3, and the transverse section of the supporting feet is in the shape of a bracket. The central shaft pipe is embedded in the connecting assembly. The first to third supporting legs and the supporting feet embedded therein can be folded inward to form a compact hollow columnar body which can be compactly matched with the central shaft pipe, so that the space utilization is maximized. Thus, the portable tripod provided by the application has a very small overall size after being stored, is very portable, and can even be put into a pocket.

Description

TECHNICAL FIELD

[0001] The present application relates to a tripod, in particular to a portable tripod. BACKGROUND

[0002] A tripod is a conventional known support structure that uses three support legs to provide a stable and reliable support platform for other equipment. Although the most common application is as a stand for equipment such as cameras, there are many potential applications for a tripod. For example, a tripod can also be used to support a laser collimator for surveying, a video camera for filming, a telescope for sky watching, and so on.

[0003] In order to facilitate portability, a tripod generally has a folding structure, but in the prior art, there is a large gap between the three support legs and the central shaft tube after folding, so that the folded tripod is still very bulky and inconvenient to carry. SUMMARY

[0004] In order to overcome the deficiencies in the prior art, the present application provides a portable and compact tripod.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A portable tripod comprises a connecting assembly, first to third support legs, and a central shaft tube. The first end of each support leg is rotatably connected to the connecting assembly. Each support leg has at least one support foot nested inside. The first to third support legs and their respective internal support feet can be folded inward to form a compact hollow cylindrical body. The central shaft tube is nested in the connecting assembly. The first to third support legs and their respective internal support feet, after being folded inward to form a compact hollow cylindrical body, can be compactly fitted with the central shaft tube. The hollow cylindrical body has a space shape that matches the central shaft tube. The first to third support legs and the central shaft tube have maximum space utilization after being stored in the tripod, and are very compact. Thus, the portable tripod according to the embodiment of the present application has a small overall volume after being stored, and is very portable.

[0007] Preferably, the central cross-section of the support leg is a 1 / 3 hollow ring. Thus, three such support legs and the central shaft tube can form a compact space.

[0008] Preferably, the support leg comprises a pair of side walls, an upper arc-shaped wall, and a lower arc-shaped wall, which surround a ring-shaped tube body. Thus, three such support legs and the central shaft tube can form a compact space.

[0009] Further, in order to enhance the structural strength of the support legs and the internally nested support feet, the side walls of the support legs comprise upper side walls and lower side walls, and each pair of side walls face each other to form a "bracket" shape. The "bracket" shape of the present application can be similar to "()" or "<>" or other similar variants. Since the upper and lower openings of the "bracket" shape are smaller than the maximum straight length inside the "bracket" shape, the support legs and the internally nested support feet will not be separated when they are stretched or retracted.

[0010] Optionally, after the first to third support legs are folded inward and combined, the lower side walls of each pair of adjacent side walls abut each other, at which time the space utilization is the highest.

[0011] Alternatively, according to different requirements and in order to reduce weight, there is a certain gap between the lower side walls of each pair of adjacent side walls after the first to third support legs are folded inward and combined.

[0012] Preferably, the connecting assembly comprises a connecting base, a locking knob and a locking ring. The connecting base is internally circular, and externally has three outwardly protruding base heads and at least one locking screw hole. The locking screw hole is threadedly connected with the locking knob, and the locking ring is coaxial with the connecting base. The first end of the support leg comprises a connecting head, which is rotatably connected with the base head. It can be understood that there are many ways to rotatably connect the connecting head with the base head in the mechanical field. For example, a base shaft hole is provided on each side of the base, and a base shaft is arranged in the base shaft hole. A connecting hole is arranged in the connecting head, and the connecting hole in the connecting head is coaxial with the base shaft hole. The base shaft passes through the connecting hole in the connecting head and the base shaft hole to rotatably connect the first to third support legs with the connecting base. Here, we will not list all the examples. The central shaft tube is nested in the connecting assembly. The central shaft tube can be fixed in the connecting assembly in a non-movable manner, or can be fixed in the connecting assembly at different positions. The locking ring comprises a locking protrusion, a locking half opening and a locking full opening. The locking protrusion is coaxial with the locking screw hole. When the central shaft tube needs to be moved up and down, the locking knob is loosened, then the central shaft tube is moved up and down to the desired position, and the locking knob is tightened. At this time, the locking knob will press the locking protrusion inward, and the locking ring will tighten and fix the central shaft tube. There are many ways to fix the connecting assembly and the central shaft tube, and we will not list all the examples here.

[0013] Preferably, in order to stabilize the tripod, the portable tripod further comprises a support fixing device, the support fixing device comprises three pairs of support rails, three pairs of support rods and a support connector, the three pairs of support rails are respectively installed at the lower end of the two side walls of the first to third supporting legs, the three pairs of support rods are respectively slidably installed on the three pairs of support rails and at least one end of the support rods is not separated from the support rails, and the other end of the three pairs of support rods is respectively rotatably installed on the support connector. Those skilled in the art can easily think of many ways to install the three pairs of support rails at the lower end of the two side walls of the first to third supporting legs, such as directly bonding with strong glue, or using physical structures such as a latch method, and the three pairs of support rails can also be integrally formed with the lower end of the two side walls of the first to third supporting legs, which will not be illustrated one by one here.

[0014] Further, the inside of the support rail is a cylindrical cavity, and in order to allow the tripod to be fixed at different opening angles when unfolded, a long strip opening with a width smaller than the diameter of the cylindrical cavity is arranged on the outside of the support rail, and the long strip opening is suitable for cooperating with the support rod, that is, one end of the support rod can be fixed at different positions of the support rail when the tripod is unfolded, thereby realizing different opening angles, and the protrusion can prevent the one end of the support rod from sliding up and down after being fixed.

[0015] Further, the support connector comprises a support disc and three claws, the three claws are arranged outside the support disc and the included angle between any two of the three claws is 120 degrees, the end of each claw has two openings with an included angle of 120 degrees, the inside of each opening is provided with a spherical cavity, and the two ends of the support rod are convex spherical bodies, and the spherical cavity is suitable for rotatably connecting with the convex spherical body at the other end of the support rod. In order to prevent the convex spherical body at the other end of the support rod from falling off, the diameter of the convex spherical body is greater than the width of the opening, and the convex spherical body at the other end of the support rod can rotate up and down in the spherical cavity along the opening.

[0016] In a further scheme, the support connector further comprises a support shaft, the center of the support disc is a hollow hole, the upper end of the support shaft is a threaded structure, the upper end of the support shaft is screwed with the lower end of the central shaft tube to play a fixing role. The middle part of the support shaft is rotatably connected with the center hollow hole of the support disc, the middle part of the support shaft is provided with an annular clamping groove, and the annular clamping groove limits the up and down movement of the support shaft, that is, the support shaft can only rotate. The lower end of the support shaft is provided with a clamping shaft and a dome, and the lower end of the support shaft is connected with the mounting hole at the bottom of the holder through the clamping shaft and the dome. Therefore, the lower end of the support shaft is provided with the clamping shaft and the dome, which expands the use scenarios of the tripod, such as low-angle shooting of the camera.

[0017] Further, the support disc further comprises a clamping protrusion, which cooperates with the supporting leg in the portable tripod support storage state to prevent the supporting leg from sliding out.

[0018] Preferably, the support rail has a certain elasticity, so that one end of the support rod can smoothly pass through the protrusions on both sides of the long opening at the lower end of the support rail when sliding up and down, and the protrusions can fix the one end of the support rod without external force.

[0019] Optionally, the middle shaft tube is a single tube, and a clamping shaft and a dome are arranged at the upper end of the middle shaft tube to facilitate quick mounting and dismounting of the gimbal, and a threaded hole is arranged at the lower end of the middle shaft tube, and the middle shaft tube is connected to the mounting hole at the bottom of the gimbal through the clamping shaft and the dome.

[0020] Alternatively, in order to lengthen the length of the middle shaft tube, at least one middle shaft sleeve is sleeved in the middle shaft tube, and adjacent two of the middle shaft tube and the middle shaft sleeve are telescopically connected, a threaded hole is arranged at the lower end of the middle shaft sleeve, a clamping shaft and a dome are arranged at the upper end of the innermost middle shaft sleeve, and the innermost middle shaft sleeve is connected to the mounting hole at the bottom of the gimbal through the clamping shaft and the dome.

[0021] In a preferred scheme, the supporting leg is sequentially nested with n supporting legs inside, and n is a positive integer greater than or equal to 3.

[0022] Further, a limiting hole is arranged at the tail end of the supporting leg. A positioning hole and a positioning device are arranged at the head end of the first supporting leg to the (n-1)th supporting leg, respectively. The positioning device comprises a base, a positioning spring, a positioning shaft and a positioning rail. The positioning rail is installed in the base and coaxial with the positioning hole. The positioning spring is arranged in the middle of the positioning rail. The positioning shaft is arranged on both sides of the positioning spring. The positioning shaft is movable on the positioning rail and coaxial with the positioning hole. A clamping block is arranged in the middle of the positioning shaft. Of course, the positioning rail can be integrally formed with the base. Even the base and the head end of the supporting leg can be integrally formed. In addition, the base simultaneously serves to fixedly connect the head end of the first supporting leg to the (n-1)th supporting leg.

[0023] The tail end of the first to (n-2) section support legs are respectively provided with a limiting hole and a fixing ring, the fixing ring is fixedly installed on the tail end of the first to (n-2) section support legs, and the fixing ring is directly connected to the tail end of the first to (n-2) section support legs. When the first section support leg is stretched out, the positioning shaft of the first section support leg enters the tail end limiting hole of the support leg under the action of the positioning spring, at this time, the positioning shaft of the first section support leg is clamped by the tail end limiting hole of the support leg, and the first section support leg is fixed and cannot be stretched out again. When the second to (n-1) section support legs are stretched out, the corresponding positioning shafts enter the corresponding limiting holes under the action of the corresponding positioning springs, for example, the positioning shaft of the second section support leg enters the limiting hole of the first section support leg under the action of the second section support leg positioning spring, at this time, the positioning shaft of the second section support leg is clamped by the limiting hole of the first section support leg, and the second section support leg is fixed and cannot be stretched out again, the tail end fixing ring of the first section support leg also has the effect of stabilizing the first and second section support legs, and the stretching process of the third to (n-1) section support legs and the effect of the corresponding fixing ring are similar, and will not be repeated here.

[0024] The tail end of the (n-1) section support leg is provided with a limiting ring, which can prevent the first end of the n section support leg from being separated from the tail end of the (n-1) section support leg. The base of the first end of the second to (n-1) section support legs is provided with an unlocking hole, and the unlocking hole of the base of the first end of the second to (n-1) section support legs is respectively matched with the clamping block protruding from the middle of the positioning shaft of the first end of the first to (n-2) section support legs. The first end of the n section support leg is provided with an unlocking block, the unlocking block is provided with an unlocking hole, and the unlocking hole of the unlocking block is matched with the clamping block protruding from the middle of the positioning shaft of the first end of the (n-1) section support leg. The n section support leg is provided with a fastening device, and the fastening device is matched with the inner wall of the (n-1) section support leg, that is, the n section support leg can be tightly fixed together at any position of the inner wall of the (n-1) section support leg through the fastening device. The tail end of the n section support leg is provided with a leg cap.

[0025] Further, in order to save limited space, the first to (n-2) section support legs are in the shape of a bracket with a transverse section in the shape of a bracket, that is, the first to (n-2) section support legs are composed of a pair of brackets with a transverse section in the shape of a bracket.

[0026] In a further scheme, the first to (n-2)th section support legs have the same bracket height in the transverse section, i.e. the bracket height is not gradually reduced like the diameter of the circular sleeve, thus the strength of each section support leg can be maximally guaranteed, and here the height refers to the height of the single bracket. The width of the first to (n-2)th section support legs is gradually reduced, thus the adjacent two sections can be nested together.

[0027] Further, the (n-1)th section support leg is tubular, but the transverse section of the two sides of the (n-1)th section support leg is still bracket-shaped, thus the strength of the (n-1)th section support leg can be enhanced.

[0028] Hereinafter, the end of the support leg close to the connecting assembly is referred to as the head end, and the other end is referred to as the tail end. When n=3, the first to (n-2)th section is only the first section, and the second to (n-1)th section is only the second section.

[0029] In an optional scheme, the support leg is internally nested with n sections of support legs, and n=2, i.e. the support leg 1 is internally nested with two sections of support legs.

[0030] Further, the tail end of the support leg is provided with a limiting hole. The head end of the first section support leg is respectively provided with a positioning hole and a positioning device, the positioning device comprises a base, a positioning spring, a positioning shaft and a positioning track, the positioning track is installed in the base and coaxial with the positioning hole, the positioning spring is arranged in the middle of the positioning track, the positioning shaft is arranged on both sides of the positioning spring, the positioning shaft can move on the positioning track and is coaxial with the positioning hole, and the middle of the positioning shaft is provided with a protruding clamping block.

[0031] When the first section support leg is stretched out, the positioning shaft enters the limiting hole under the action of the positioning spring, at this time, the positioning shaft of the first section support leg is clamped by the limiting hole of the tail end of the support leg, and the first section support leg is fixed and cannot be stretched out again. The tail end of the first section support leg is provided with a limiting ring, which can prevent the head end of the n section support leg from being separated from the tail end of the (n-1)th section support leg. The head end of the n section support leg is provided with an unlocking block, the unlocking block is provided with an unlocking hole, and the unlocking hole of the unlocking block is matched with the protruding clamping block in the middle of the positioning shaft of the head end of the (n-1)th section support leg.

[0032] The n section support leg is provided with a fastening device, which is matched with the inner wall of the (n-1)th section support leg, i.e. the n section support leg can be tightly fixed together at any position of the inner wall of the (n-1)th section support leg through the fastening device. The tail end of the n section support leg is provided with a leg cap.

[0033] Further, the (n-1)th supporting leg is tubular.

[0034] In another optional solution, the supporting leg is internally nested with n supporting legs, and n=1, i.e. the supporting leg 1 is internally nested with one supporting leg 3. The supporting leg tail end is provided with a limiting ring. The nth supporting leg is provided with a fastening device, which is suitable for cooperating with the inner wall of the supporting leg. The tail end of the nth supporting leg is provided with a leg cap.

[0035] In the aforementioned preferred solution and / or optional solution, the fastening device comprises a fastening shaft, a fastening spring and a fastening head, the middle part of the fastening shaft is provided with a protruding snap ring, one end of the fastening head is protrudingly provided with two elastic clamps, the center of the fastening head is provided with a round hole, and the center of the unlocking block is provided with a round hole.

[0036] The fastening shaft is internally nested in the nth supporting leg, and the fastening shaft can move and rotate in the nth supporting leg. The leg cap is fixedly connected to one end of the fastening shaft. The other end of the fastening head is fixedly connected to the first end of the nth supporting leg. The other end of the fastening shaft is rotatably connected to the center round hole of the unlocking block. The fastening spring is nested in the fastening shaft, one end of the fastening spring is fixed to the protruding snap ring, and the other end of the fastening spring is fixed to the other end of the fastening head. The fastening spring is always in a stretched state. The outer side of the unlocking block is slidably matched with the two elastic clamps. When the outer side of the unlocking block slides to the end of the two elastic clamps, the elastic clamps are tightly pressed against the inner wall of the (n-1)th supporting leg, i.e. the nth supporting leg is fixed and cannot move at this time. When the outer side of the unlocking block slides to the first end of the two elastic clamps, the elastic clamps can easily slide along the inner wall of the (n-1)th supporting leg. In this way, the movement of the nth supporting leg in the inner wall of the (n-1)th supporting leg at any position is realized, i.e. the nth supporting leg and the (n-1)th supporting leg can be adjusted to different supporting heights, thereby improving the applicability of the tripod.

[0037] In the aforementioned preferred solution and / or optional solution, the fastening device of the nth supporting leg has another implementation, i.e. it can be directly realized by designing the nth supporting leg as a micro-elliptical pipe body and providing a micro-elliptical limiting ring at the tail end of the (n-1)th supporting leg. The micro-elliptical pipe body of the nth supporting leg and the micro-elliptical pipe body of the nth supporting leg can be locked or unlocked by rotating left and right. In order to complete the unlocking of the (n-1)th supporting leg, the center of the unlocking block is provided with a round hole, and the first end of the nth supporting leg is rotatably connected to the center round hole of the unlocking block.

[0038] Further, a clamping protrusion is arranged in the foot cap, a recess is arranged at the tail end of the n-th supporting leg, the fastening spring is always in tension, when the outer side of the unlocking block slides to the end of the two elastic clamping pieces, the clamping protrusion in the foot cap is tightly matched with the recess at the tail end of the n-th supporting leg, when the outer side of the unlocking block slides to the head of the two elastic clamping pieces, the clamping protrusion in the foot cap is separated from the recess at the tail end of the n-th supporting leg and rotates away from the recess.

[0039] In the foregoing preferred solution, the portable tripod further comprises a positioning hole guiding system arranged in the supporting legs and the first to (n-1)-th supporting legs nested in sequence, when the first to (n-1)-th supporting legs are stretched out, the positioning hole guiding system guides the positioning shafts into the limiting holes under the action of the positioning springs respectively.

[0040] In a further solution, the positioning hole guiding system comprises recessed pieces and protruding pieces, the recessed pieces are respectively nested and fixed at the two sides of the tail end of the supporting legs and the tail end of the first to (n-2)-th supporting legs, the recesses of the recessed pieces are towards the connecting assembly, the protruding pieces are respectively fixed and arranged at the two sides of the bases of the positioning devices in the first to (n-1)-th supporting legs, the protrusions of the protruding pieces are towards the foot cap. When the first to (n-1)-th supporting legs are stretched out, the protruding pieces of the first to (n-1)-th supporting legs are matched with and guide the corresponding positioning shafts into the corresponding limiting holes under the action of the corresponding positioning springs respectively. For example, when the first supporting leg is stretched out, the protruding piece of the first supporting leg is matched with and guides the positioning shaft of the first supporting leg into the limiting hole of the supporting leg under the action of the positioning spring of the first supporting leg, when the second supporting leg is stretched out, the protruding piece of the second supporting leg is matched with and guides the positioning shaft of the second supporting leg into the limiting hole of the first supporting leg under the action of the positioning spring of the second supporting leg, and the following is similar.

[0041] In a further solution, the positioning hole guiding system is a track groove, the track grooves are respectively arranged at the two sides of the supporting legs and the two inner sides of the first to (n-2)-th supporting legs, one end of the track grooves respectively terminates at the limiting holes at the two sides of the tail end of the supporting legs and the limiting holes at the two sides of the tail end of the first to (n-2)-th supporting legs, the other end of the track grooves respectively terminates at the two sides of the head end of the supporting legs and the two sides of the head end of the first to (n-2)-th supporting legs.

[0042] In the foregoing optional scheme, the portable tripod further comprises a positioning hole guiding system arranged in the support leg and the first section support foot nested in the support leg in sequence, and the positioning hole guiding system guides the positioning shaft to enter the limiting hole under the action of the limiting spring when the first section support foot is stretched out.

[0043] In a further scheme, the positioning hole guiding system comprises a groove plate and a protrusion plate, the groove plate is fixedly nested on both sides of the tail end of the support leg, the groove of the groove plate faces the connecting assembly, the protrusion plate is fixedly installed on both sides of the base of the positioning device in the first section support foot, and the protrusion of the protrusion plate faces the foot cap. When the first section support foot is stretched out, the protrusion plate of the first section support foot cooperates with the groove plate of the support leg and guides the corresponding positioning shaft to enter the corresponding limiting hole under the action of the corresponding limiting spring.

[0044] In a further scheme, the positioning hole guiding system is a track groove arranged on both sides of the support leg, one end of the track groove terminates at the limiting hole on both sides of the tail end of the support leg, and the other end of the track groove terminates at both sides of the head end of the support leg. When the first section support foot is stretched out, the positioning shaft of the first section support foot reaches and enters the corresponding limiting hole under the guidance of the track groove and the action of the limiting spring.

[0045] Compared with the prior art, the portable tripod provided by the present application has the following beneficial effects:

[0046] 1. The portable tripod has a compact structure and a small size after being stored, and is very portable.

[0047] 2. The portable tripod has a compact structure, and the first to third support legs can be used as handles after being stored, and the middle shaft pipe can be sleeved with multiple sleeves and independently telescoped to be used as a selfie stick.

[0048] 3. The portable tripod can realize quick disassembly of the middle shaft pipe and the connecting assembly, and the middle shaft pipe can be used as a selfie stick after being disassembled. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0050] FIG. 1 is a perspective view of the portable tripod according to the present application.

[0051] FIG. 2 is a side view of any of the support legs of the present invention with their respective internal support feet stowed.

[0052] FIG. 3 is a bottom view of any of the support legs of the present invention.

[0053] FIG. 4 is an exploded view of any of the support legs of the present invention with their respective internal support feet stowed.

[0054] FIG. 5 is a perspective view of any of the support legs of the present invention with their respective internal support feet stowed.

[0055] FIG. 6 is a bottom view of the portable tripod of the present invention with its legs stowed.

[0056] FIG. 7 is an exploded view of the connecting assembly of the present invention.

[0057] FIG. 8 is a top view of the connecting assembly of the present invention.

[0058] FIG. 9A is a top view of the three pairs of support rods and support connectors of the present invention when deployed.

[0059] FIG. 9B is a bottom view of the three pairs of support rods and support connectors of the present invention when deployed.

[0060] FIG. 9C is a perspective view of the three pairs of support rods and support connectors of the present invention when deployed.

[0061] FIG. 10 is a perspective view of the support connector (including support shaft) of the present invention.

[0062] FIG. 11 is a bottom view of the support connector of the present invention.

[0063] FIG. 12 is a perspective view of the portable tripod of the present invention (without the central shaft tube) with its legs stowed.

[0064] FIG. 13 is a perspective view of one deployment process (pre-deployment) of the portable tripod of the present invention.

[0065] FIG. 14 is a perspective view of one deployment process (mid-deployment) of the portable tripod of the present invention.

[0066] FIG. 15is a schematic diagram of the unfolding process (unfolded) of the portable tripod according to the present invention.

[0067] FIG. 16 is a schematic diagram of the side view structure of any one of the supporting legs and their respective inner supporting feet after unfolding according to the present invention.

[0068] FIG. 17A is FIG. 16 is an enlarged view of region A in

[0069] FIG. 17B is FIG. 17C is a schematic diagram of the side view structure of

[0070] FIG. 17D is FIG. 17A is a schematic diagram of the perspective structure of

[0071] FIG. 17B is FIG. 17C is a schematic diagram of the explosion of

[0072] FIG. 17D is a schematic diagram of the perspective structure of the first to (n-2)th section supporting feet according to the present invention, wherein n is a positive integer greater than or equal to 3.

[0073] FIG. 18 is a schematic diagram of the explosion of the n th and (n-1)th section supporting feet according to the present invention.

[0074] FIG. 19 is a schematic diagram of the structure of the n th and (n-1)th section supporting feet when locked according to the present invention.

[0075] FIG. 20A is a schematic diagram of the structure of the n th and (n-1)th section supporting feet when unlocked according to the present invention.

[0076] FIG. 20B is a partial sectional view of the n th and (n-1)th section supporting feet when locked according to the present invention.

[0077] FIG. 21 is FIG. 22 is an enlarged view of region A in

[0078] FIG. 21 is a schematic diagram of the structure of the supporting feet before being stored and unlocked according to the present invention.

[0079] FIG. 23A is a partial sectional view of the supporting feet before being stored and unlocked according to the present invention.

[0080] FIG. 23B is a schematic diagram of the structure of the supporting feet after being stored and unlocked according to the present invention.

[0081] FIG. 24A is a partial sectional view of the supporting feet after being stored and unlocked according to the present invention.

[0082] FIG. 24B is a sectional view of any support leg and its respective internal support foot of the present invention after being housed.

[0083] FIG. 25 is FIG. 26 is an enlarged view of region A in the middle.

[0084] FIG. 25 is FIG. 27 is an enlarged view of region B in the middle.

[0085] FIG. 25 is a perspective view of the portable tripod of the present invention after being housed.

[0086] FIG. 28A is a middle transverse sectional view of the portable tripod of the present invention after being housed.

[0087] FIG. 28B is a schematic view of the portable tripod of the present invention with the support leg and its respective internal support foot in the shape of a "parenthesis".

[0088] FIG. 28C is a schematic view of the portable tripod of the present invention with the support leg and its respective internal support foot fully deployed and the central shaft tube fully deployed.

[0089] FIG. 29 is a schematic view of the portable tripod of the present invention with the support leg and its respective internal support foot partially deployed and the central shaft tube fully deployed.

[0090] FIG. 30 is a schematic view of the portable tripod of the present invention with the support leg and its respective internal support foot partially deployed and the central shaft tube retracted.

[0091] FIG. 31 is a schematic view of the portable tripod of the present invention with the support leg and its respective internal support foot fully deployed and the gimbal hanging upside down.

[0092] FIG. 32 is a schematic view of the portable tripod of the present invention with the support leg and its respective internal support foot partially deployed and the gimbal hanging upside down.

[0093] FIG. 33 is a schematic view of the portable tripod of the present invention with the support leg and its respective internal support foot fully housed and the gimbal hanging upside down.

[0094] FIG. 34 is a schematic view of the portable tripod of the present invention with the positioning hole guide system.

[0095] BRIEF DESCRIPTION OF THE DRAWINGS:

[0096] support leg 1

[0097] connecting head 11, upper arc-shaped wall 12, lower arc-shaped wall 13, side wall 14,

[0098] limiting hole 101, connecting hole 111, upper side wall 141, lower side wall 142,

[0099] connecting assembly 2

[0100] connecting base 21, locking knob 22, locking ring 23,

[0101] base head 211, base shaft hole 212, base shaft 213, locking screw hole 214, locking protrusion 231, locking half opening 232, locking full opening 233,

[0102] support leg 3,

[0103] first section support leg 31, second section support leg 32, third section support leg 33, fourth section support leg 34, fifth section support leg 35,

[0104] limiting hole 301, fixing ring 302, limiting ring 303, groove 350, leg cap 351,

[0105] clamping protrusion 3510,

[0106] central shaft tube 4,

[0107] central shaft sleeve 41,

[0108] dome 401, clamping shaft 402,

[0109] fixing device 5,

[0110] support rail 51, support rod 52, support connecting head 53,

[0111] long strip opening 511, outlet 512, mounting port 513, protruding sphere 521, support disc 531, three clamping jaws 532, support shaft 533,

[0112] protrusion 5110, clamping protrusion 5311, opening 5321, spherical cavity 5322, screw structure 5331, clamping shaft 5332, dome 5333,

[0113] positioning device 6,

[0114] base 61, positioning spring 62, positioning shaft 63, positioning rail 64,

[0115] positioning hole 601, unlocking hole 610, unlocking block 611, round hole 612, clamping block 631,

[0116] protruding piece 71, recessed piece 72, rail groove 73,

[0117] fastening device 8,

[0118] Fastening shaft 81, fastening spring 82, fastening head 83

[0119] Snap ring 811, round hole 830, elastic clip 831

[0120] Gimbal 9. Detailed Implementation

[0121] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0122] Example 1

[0123] like FIG. 35 As shown, this embodiment of the invention provides a portable tripod, including a connecting assembly 2, first to third support legs 1, and a central tube 4. The first end of each support leg 1 is rotatably connected to the connecting assembly 2, and each support leg 1 has at least one nested support foot 3 inside. FIG. 1 and FIG. 6 As shown, the first to third supporting legs 1 and their respective internal supporting feet 3 can be folded inward to form a compact hollow column. FIG. 12 As shown, the central tube 4 is nested within the connecting assembly 2. The first to third support legs 1 and their respective internal support feet 3 fold inward to form a compact hollow column that fits snugly with the central tube 4. Those skilled in the art will readily understand that the spatial shape of the hollow column is matched to the central tube 4. The first to third support legs 1 and the central tube 4 maximize space utilization after the tripod is folded, resulting in a very compact design. Therefore, the portable tripod in this embodiment of the invention is small in size and highly portable after folding.

[0124] Combination FIG. 13 , FIG. 3 and FIG. 4As shown, in the present embodiment, the support leg 1 has a 1 / 3 hollow ring-shaped central section. The support leg 1 comprises a pair of side walls 14, an upper arc-shaped wall 12 and a lower arc-shaped wall 13, which enclose a ring-shaped tube body. As can be easily understood by those skilled in the art, the central section of the support leg of a general tripod is in the shape of a circle, i.e. an "O", and it is difficult for three "O"-shaped support legs and a central tube to enclose a compact space. However, in the present embodiment, the support leg 1 has a 1 / 3 hollow ring-shaped central section, and three such support legs 1 and a central tube can enclose a compact space.

[0125] In order to enhance the structural strength of the support leg 1 and the internally nested support foot 3, as shown in FIG. 5 , FIG. 3 , the side wall 14 of the support leg 1 comprises an upper side wall 141 and a lower side wall 142, and each pair of side walls 14 faces each other to form a "bracket" shape. It can be understood that the "bracket" shape in the present embodiment can be in the shape of "()", "<>" or other similar variants. Since the upper and lower openings of the "bracket" shape are smaller than the maximum inner diameter of the "bracket" shape, the support leg 1 and the internally nested support foot 3 will not be separated when they are stretched or retracted.

[0126] In the present embodiment, as shown in FIG. 4 , the first to third support legs 1 are folded inward to form a body, and the lower side walls 142 of the two adjacent support legs 1 abut each other at this time, achieving the highest space utilization. Of course, alternatively, in another embodiment, according to different requirements and in order to reduce weight, the first to third support legs 1 can have a certain gap between the two adjacent lower side walls 142 after being folded inward to form a body. For example, the central section of the support leg 1 is in the shape of a 1 / 4 hollow ring, and three such 1 / 4 hollow ring-shaped support legs 1 enclose a hollow columnar body with a certain gap.

[0127] In the present embodiment, as shown in FIG. 6 and FIG. 7 , the connecting assembly 2 comprises a connecting base 21, a locking knob 22 and a locking ring 23. The connecting base 21 is in the shape of a ring inside, and has three outwardly protruding base heads 211 and at least one locking screw hole 214 outside. The locking screw hole 214 is threadedly connected with the locking knob 22, and the locking ring 23 is coaxial with the connecting base 21. As shown in FIG. 8 and FIG. 2 , the first end of the support leg 1 comprises a connecting head 11, which is rotatably connected with the base head 211. It can be understood that there are many ways to rotatably connect the connecting head 11 with the base head 211 in the mechanical field. For example, as shown in FIG. 7 and FIG. 1As shown, one coaxial base shaft hole 212 is arranged on each side of the base head 211, and a base shaft 213 is arranged in the base shaft hole 212. A connecting hole 111 is arranged in the connecting head 11, and the connecting hole 111 in the connecting head 11 is coaxial with the base shaft hole 212. The base shaft 213 passes through the connecting hole 111 in the connecting head 11 and the base shaft hole 212 to rotatably connect the first to third supporting legs 1 with the connecting base 21. Here, the connection mode is not exemplified one by one. FIG. 7 and FIG. 1 As shown, the locking ring 23 includes a locking protrusion 231, a locking half opening 232, and a locking full opening 233. The locking protrusion 231 is coaxial with the locking threaded hole 214. When the middle shaft tube 4 needs to be moved up and down, the locking knob 22 is loosened, and then the middle shaft tube 4 is moved up and down to the desired position. The locking knob 22 is tightened, and at this time, the locking knob 22 will inwardly press the locking protrusion 231. The locking ring 23 is tightened and fixes the middle shaft tube. There are many ways to fix the connecting assembly 2 and the middle shaft tube, and here, the connection mode is not exemplified one by one.

[0128] In the preferred scheme, as shown in FIG. 7 In order to stabilize the tripod, the portable tripod further includes a support fixing device 5, as shown in FIG. 1 、 FIG. 4 、 FIG. 9A 、 FIG. 9B As shown, the support fixing device 5 includes three pairs of support rails 51, three pairs of support rods 52, and a support connecting head 53. The three pairs of support rails 51 are respectively arranged at the lower ends of the upper side walls 141 of the first to third supporting legs 1. The three pairs of support rods 52 are respectively slidably arranged on the three pairs of support rails 51, and at least one end of the support rod 52 does not deviate from the support rail. The other end of the three pairs of support rods 52 is rotatably arranged on the support connecting head 53. Those skilled in the art can easily think of many ways to arrange the three pairs of support rails 51 at the lower ends of the upper side walls of the first to third supporting legs 1, such as directly using strong glue to bond, and other physical structures such as a latch method. In addition, the three pairs of support rails 51 can be directly integrated with the lower ends of the upper side walls of the first to third supporting legs 1, and here, the connection mode is not exemplified one by one.

[0129] As shown in FIG. 9C 、 FIG. 3 and FIG. 4As shown, the inside of the support rail 51 is a cylindrical cavity. In order to allow the tripod to be fixed at different opening angles when unfolded, the outside of the support rail 51 is provided with a long opening 511 with a width smaller than the diameter of the cylindrical cavity. At least one pair of protrusions 5110 is provided on both sides of the long opening 511 at the lower end of the support rail 51. The long opening 511 is adapted to cooperate with the support rod 52. That is, when the tripod is unfolded, one end of the support rod 52 can be fixed at different positions of the support rail 51, thereby achieving different opening angles. The protrusions 5110 can prevent the one end of the support rod 52 from sliding up and down after being fixed. FIG. 5 As shown, in order to prevent the support rod 52 from detaching from the support rail, the lower end of the support rail 51 is provided with an outlet 512 with a minimum diameter smaller than the diameter of the cylindrical cavity. FIG. 3 As shown, in order to facilitate installation, the inside of the lower end of the support rail 51 is provided with an installation opening 513 with a minimum diameter greater than or equal to the diameter of the cylindrical cavity. The support rod 52 can be installed into the support rail 51 through the installation opening 513 in advance, and then the support rail 51 is installed at the lower end of the two upper side walls 141 of the support leg 1, while the installation opening 513 is closed.

[0130] As shown, FIG. 4 , FIG. 10 As shown, the support connector 53 includes a support disc 531 and three pawls 532. The three pawls 532 are arranged outside the support disc 531 and have an included angle of 120 degrees between each other. The pawls 532 have two openings 5321 with an included angle of 120 degrees at the ends. The inside of the openings 5321 is provided with a spherical cavity 5322. FIG. 11 As shown, the two ends of the support rod 52 are convex spherical bodies 521. The spherical cavity 5322 is adapted to rotatably connect with the convex spherical body 521 at the other end of the support rod 52. It can be understood that, in order to prevent the convex spherical body 521 at the other end of the support rod 52 from falling off, the diameter of the convex spherical body 521 is greater than the width of the opening 5321. The convex spherical body 521 at the other end of the support rod 52 can rotate up and down in the spherical cavity 5322 along the opening 5321.

[0131] As shown, FIG. 4 As shown, the support connector 53 further includes a support shaft 533. The center of the support disc 531 is a hollow hole. The upper end of the support shaft 533 is a threaded structure 5331. The upper end of the support shaft 533 is threadedly connected with the lower end of the central shaft tube 4, thereby serving as a fixing function. The middle part of the support shaft 533 is rotatably connected with the center hollow hole of the support disc 531. The middle part of the support shaft 533 is provided with an annular clamping groove (not shown in the figure). The annular clamping groove limits the up and down movement of the support shaft 533, that is, the support shaft 533 can only rotate. The lower end of the support shaft 533 is provided with a clamping shaft 5332 and a dome 5333. FIG. 10 ,FIG. 32 and FIG. 33 As shown in

[0132] As shown in FIG. 34 , FIG. 10 and FIG. 11 As shown in

[0133] Preferably, the bracket rail 51 has a certain elasticity, so that one end of the bracket rod 52 can smoothly pass through the protrusions on both sides of the long opening 511 at the lower end of the bracket rail 51 when sliding up and down, and the protrusions can fix one end of the bracket rod 52 when there is no external force.

[0134] The following is a brief description of the unfolding process of the portable tripod bracket fixing device 5 of the embodiment:

[0135] First, as shown in FIG. 28A and FIG. 13 The tripod is in a storage state, the bracket rod 52 (not shown in the figure) is in the bracket rail 51, and the bracket shaft 533 is threadedly connected to the lower end of the central shaft tube 4.

[0136] Then, as shown in FIG. 28A , the threaded connection between the bracket shaft 533 and the lower end of the central shaft tube 4 is unscrewed, and the bracket rod 52 is pulled out to a certain position.

[0137] Finally, as shown in FIG. 14 , the support leg 1 is unfolded, and the other end of the bracket rod 52 is again threadedly connected to the lower end of the central shaft tube 4 through the bracket shaft 533, and at this time, by adjusting the position of one end of the bracket rod 52 in the long opening 511 at the lower end of the bracket rail 51, different unfolding angles of the support leg 1 can be achieved.

[0138] In an alternative scheme, the central shaft tube 4 is a single tube, and in order to facilitate quick assembly and disassembly of the gimbal 9, a clamping shaft 402 and a dome 401 are arranged at the upper end of the central shaft tube 4, the central shaft tube 4 is connected to the bottom mounting hole of the gimbal 9 through the clamping shaft 402 and the dome 401, and a threaded hole is arranged at the lower end of the central shaft tube 4, that is, the threaded hole is threadedly connected to the upper end of the bracket shaft 533.

[0139] Of course, as shown in FIG. 1As shown, in order to lengthen the length of the central shaft tube 4, in another alternative, at least one central shaft sleeve 41 is sleeved in the central shaft tube 4, and each two adjacent central shaft tube 4 and central shaft sleeve 41 are telescopically connected. The lower end of the innermost central shaft sleeve 41 is provided with a threaded hole, the upper end of the innermost central shaft sleeve 41 is provided with a shaft clamp 402 and a dome 401, and the innermost central shaft sleeve 41 is connected with the bottom mounting hole of the holder 9 through the shaft clamp 402 and the dome 401. It should be pointed out that the holder 9 mentioned here can be the photographic tripod holder 9 disclosed in Chinese invention patent ZL201620760201.6.

[0140] In the embodiment, the support leg 1 is sequentially nested with n support feet 3 inside, and n is a positive integer greater than or equal to 3, that is, the support leg 1 is sequentially nested with at least three support feet 3 inside. Here, in order to facilitate the description of the relationship between the support leg 1 and the support feet 3 inside, the number of support feet 3 is represented by "n".

[0141] In one specific embodiment, n = 5, as shown in FIG. 29 and FIG. 15 The first to n support feet are the first support foot 31, the second support foot 32, the third support foot 33, the fourth support foot 34, and the fifth support foot 35, respectively. The specific structure of the support leg 1 and the first to n support feet in this specific embodiment and the folding principle are described below.

[0142] First, the specific structure of the support leg 1 and the first to (n-1) support feet in this specific embodiment and the extension process are described:

[0143] As shown in FIG. 16 , the tail end of the support leg 1 is provided with a limiting hole 101. As shown in FIG. 13 , FIG. 17A , FIG. 17B and FIG. 17C , the first to (n-1) support feet are respectively provided with a positioning hole 601 and a positioning device 6. The positioning device 6 includes a base 61, a positioning spring 62, a positioning shaft 63, and a positioning track 64. The positioning track 64 is installed in the base 61 and coaxial with the positioning hole 601. The positioning spring 62 is arranged in the middle of the positioning track 64. The positioning shaft 63 is arranged on both sides of the positioning spring 62. The positioning shaft 63 can move on the positioning track 64 and is coaxial with the positioning hole 601. The positioning shaft 63 is provided with a protruding clamping block 631 in the middle. Of course, those skilled in the art can easily understand that the positioning track 63 can also be integrally formed with the base 61, and even the base 61 and the head of the support foot can also be integrally formed. In addition, the base 61 also serves to fixedly connect the heads of the first to (n-1) support feet. As shown inFIG. 17D 、 FIG. 17A 、 FIG. 17B 、 FIG. 17C and FIG. 17D As shown in the drawings, the tail end of the first to (n-2) section support legs is provided with a limiting hole 301 and a fixing ring 302, the fixing ring 302 is fixedly installed at the tail end of the first to (n-2) section support legs, and the fixing ring 302 is fixedly connected to the tail end of the first to (n-2) section support legs. When the first section support leg is stretched out, the positioning shaft 63 of the first section support leg enters the tail end limiting hole 101 of the support leg 1 under the action of the positioning spring 62. At this time, the positioning shaft 63 of the first section support leg is clamped by the tail end limiting hole 101 of the support leg 1, and the first section support leg is fixed and cannot be stretched out again. When the second to (n-1) section support legs are stretched out, the corresponding positioning shaft 63 enters the corresponding limiting hole 301 under the action of the corresponding positioning spring 62, for example, the positioning shaft 63 of the second section support leg enters the limiting hole 301 of the first section support leg under the action of the positioning spring 62 of the second section support leg. At this time, the positioning shaft 63 of the second section support leg is clamped by the limiting hole 301 of the first section support leg, and the second section support leg is fixed and cannot be stretched out again. The tail end fixing ring 302 of the first section support leg also has the effect of stabilizing the first and second section support legs. The stretching process of the third to (n-1) section support legs and the effect of the corresponding fixing ring 302 are similar and will not be repeated.

[0144] As shown in the drawings, FIG. 18 、 FIG. 19 and FIG. 20A The tail end of the (n-1) section support leg is provided with a limiting ring 303, which can prevent the first end of the n section support leg from being separated from the tail end of the (n-1) section support leg.

[0145] In order to solve the problem that the first to (n-1) section support legs are fixed and cannot be stretched out when they are stretched out, the second to n section support legs of the embodiment are designed as follows:

[0146] As shown in the drawings, FIG. 20B 、 FIG. 19 、 FIG. 20A 、 FIG. 20B and FIG. 21As shown in the drawings, the base 61 of the first end of the second to (n-1)th supporting legs is provided with an unlocking hole 610, which is adapted to cooperate with the protruding clamping block 631 of the middle part of the positioning shaft 63 of the first end of the first to (n-2)th supporting legs. The first end of the nth supporting leg is provided with an unlocking block 611, which is provided with an unlocking hole 610, which is adapted to cooperate with the protruding clamping block 631 of the middle part of the positioning shaft 63 of the first end of the (n-1)th supporting leg.

[0147] As shown in the drawings, FIG. 22 , FIG. 19 , FIG. 20A , FIG. 20B and FIG. 21 , the nth supporting leg is provided with a fastening device 8, which is adapted to cooperate with the inner wall of the (n-1)th supporting leg, that is, the nth supporting leg can be tightly fixed together at any position of the inner wall of the (n-1)th supporting leg through the fastening device 8. The tail end of the nth supporting leg is provided with a leg cap 351. As shown in the drawings, FIG. 22 , FIG. 25 and FIG. 26 , in order to save space, the unlocking holes 610 on the base 61 are staggered above and below the positioning rails 64, and the positioning rails 64 on the base 61 are not on the same axis in the direction of the supporting legs.

[0148] Further, as shown in the drawings, FIG. 27 , FIG. 19 , FIG. 20A , FIG. 20B and FIG. 21 , the fastening device 8 includes a fastening shaft 81, a fastening spring 82 and a fastening head 83, the middle part of the fastening shaft 81 is provided with a protruding clamping ring 811, one end of the fastening head 83 is provided with two elastic clamping pieces 831, the center of the fastening head 83 is provided with a circular hole 830, and the center of the unlocking block 611 is provided with a circular hole 612.

[0149] As shown in the drawings, FIG. 22 , the fastening shaft 81 is nested in the nth supporting leg, and the fastening shaft 81 can move and rotate in the nth supporting leg. The leg cap 351 is fixedly connected to one end of the fastening shaft 81. As shown in the drawings, FIG. 19 and FIG. 20A , the other end of the fastening head 83 is fixedly connected to the first end of the nth supporting leg. The other end of the fastening shaft 81 is rotatably connected to the center circular hole 612 of the unlocking block 611. As shown in the drawings, FIG. 20B and FIG. 21As shown, the fastening spring 82 is nested in the fastening shaft 81, one end of the fastening spring 82 is fixed to the protruding clasp 811, and the other end of the fastening spring 82 is fixed to the other end of the fastening head 83. The fastening spring 82 is always in a stretched state. The outer side of the unlocking block 611 is slidably connected to the two elastic clamps 831. As shown FIG. 22 As shown, when the outer side of the unlocking block 611 slides to the end of the two elastic clamps 831, the elastic clamps 831 are tightly pressed against the inner wall of the (n-1)th support leg, and the nth support leg is fixed and cannot move at this time, as shown FIG. 20A As shown, when the outer side of the unlocking block 611 slides to the end of the two elastic clamps 831, the elastic clamps 831 are tightly pressed against the inner wall of the (n-1)th support leg, and the nth support leg is fixed and cannot move at this time, as shown

[0150] Of course, there are many ways to achieve the movement of the nth support leg at any position in the inner wall of the (n-1)th support leg, for example, the fastening device 8 of the nth support leg can be directly achieved by designing the nth support leg as a micro-elliptical pipe body and setting a micro-elliptical limiting ring 303 at the tail end of the (n-1)th support leg. The micro-elliptical pipe body of the nth support leg and the micro-elliptical limiting ring 303 at the tail end of the (n-1)th support leg can be locked and fastened or unlocked and slid by rotating left and right. In order to complete the unlocking of the (n-1)th support, a circular hole 612 is arranged at the center of the unlocking block 612, and the head end of the nth support leg is rotatably connected to the circular hole 612 at the center of the unlocking block.

[0151] Further, as shown FIG. 20BAs shown, the cap 351 is provided with a clamping protrusion 3510, the tail end of the n th supporting leg is provided with a groove 350, the fastening spring 82 is always in tension, when the unlocking block 611 slides to the end of the two elastic clamping pieces 831, the clamping protrusion 3510 in the cap 351 tightly fits the groove 350 of the tail end of the n th supporting leg, at this time, the unlocking block 611 stays at the end of the two elastic clamping pieces 831 under the tension of the fastening spring 82, and the n th supporting leg is fixed and cannot move for a long time. When the n th supporting leg needs to move, the unlocking block 611 slides to the head of the two elastic clamping pieces 831, the clamping protrusion 3510 in the cap 351 is separated from the groove 350 of the tail end of the n th supporting leg and rotates away from the groove at the same time, at this time, the clamping protrusion 3510 in the cap 351 is on the tail end of the n th supporting leg, and the n th supporting leg can be easily moved to any position, when it is moved to another position, the cap 351 is rotated to align the clamping protrusion 3510 in the cap 351 with the groove 350 of the tail end of the n th supporting leg, and then the hand is released, the clamping protrusion 3510 in the cap 351 tightly fits the groove 350 of the tail end of the n th supporting leg under the tension of the fastening spring 82, thereby realizing long-time fixing in another position.

[0152] As shown in the figure, the supporting leg of the portable tripod of the application can be expanded to different heights, the n th supporting leg and the (n-1) th supporting leg can be adjusted to different supporting heights, thereby improving the applicability of the tripod, and the required height can be adjusted on uneven ground, in addition, the upper and lower ends of the middle shaft pipe can be connected with the gimbal, thereby further improving the applicability of the tripod. FIG. 19 The following briefly describes the storage principle of the first to n th supporting legs according to the embodiment:

[0153] As shown in the figure, the first to n th supporting legs according to the embodiment can be completely expanded or partially expanded, and when they are stored, they are stored from the last one to the inside. The unlocking hole 610 on the unlocking block 611 of the n th supporting leg and the unlocking hole 610 on the head base 61 of the second to (n-1) th supporting legs are sequentially and respectively unlocked to the first to (n-1) th supporting legs. The unlocking principle of each supporting leg is the same, and the following only takes the third supporting leg as an example to describe how the unlocking hole 610 on the third supporting leg unlocks the first to second supporting legs when they are stored:

[0154] FIG. 4 and FIG. 17D FIG. 18 ​​As shown, when the third section support leg is about to be retracted into the bottom, the bevel of the unlocking hole 610 on the third section support leg and the bevel of the clamping block 631 on the second section support leg are in contact with each other. As the third section support leg is further retracted, the bevel of the unlocking hole 610 on the third section support leg and the bevel of the clamping block 631 on the second section support leg interact with each other, the positioning shaft 63 on the second section support leg moves inward along the axis and gradually separates from the positioning hole 301 on the tail end of the first section support leg, as shown. FIG. 19 and FIG. 35 As shown, when the third section support leg is further retracted, the positioning shaft 63 on the second section support leg is completely separated from the positioning hole 301 on the tail end of the first section support leg. At this time, the second section support leg can be retracted into the first section support leg. It is easy for those skilled in the art to understand that, for the sake of convenience, the limiting hole 101 at the tail end of the support leg 1 and the limiting hole 301 at the tail end of the first section to the (n-2) section support leg have the same effect, and therefore the unlocking principle is the same.

[0155] In order to save limited space, as shown in FIG. 4 and FIG. 19 The first section to the (n-2) section support leg is in the shape of a bracket, that is, it is composed of a pair of brackets in the shape of a bracket. Since the upper and lower parts of the bracket are open, the height of the bracket of all the first section to the (n-2) section support leg is the same, that is, the height of the bracket is not decreasing in diameter like a circular sleeve, so the strength of each section of the support leg can be maximized. In addition, the height here refers to the height of a single bracket. The width of the first section to the (n-2) section support leg is decreasing, so the adjacent two sections can be nested together. The (n-1) section support leg is in the shape of a tube, but the lateral section of the (n-1) section support leg is still in the shape of a bracket, so the strength of the (n-1) section support leg can be enhanced. It is easy for those skilled in the art to understand that the lateral section of the (n-1) section support leg can also be directly in the shape of a bracket, or the (n-2) section support leg and the (n-1) section support leg can both be in the shape of a tube, or even any section of the support leg can be in the shape of a tube or every other section can be in the shape of a tube, which are all acceptable, except that the strength of the support leg and the degree of space saving are different. These two types of support legs can have many combinations, which will not be listed one by one here.

[0156] In the present embodiment, since n=5, the n-th supporting leg is the 5th supporting leg, the (n-1)-th supporting leg is the 4th supporting leg, and the (n-2)-th supporting leg is the 3rd supporting leg. The present application uses n because the number of supporting legs can be various combinations, the n-th supporting leg is the last supporting leg, the (n-1)-th supporting leg is the second last supporting leg, and the expression is very convenient. It should be understood that if n=3, the 1st to (n-2)-th expression is actually only the 1st, and the 2nd to (n-1)-th is actually only the 2nd. In addition, as explained below, all supporting legs 1 and all supporting legs 3 near one end of the connecting assembly 2 are referred to as the head end, and the other end is referred to as the tail end.

[0157] Embodiment 2

[0158] The main difference between the present embodiment 2 and the above-mentioned embodiment 1 is that the supporting leg is nested with n supporting legs 3 inside, and n=2, i.e. the supporting leg 1 is nested with two supporting legs 3 inside. Here, in order to facilitate the expression of the relationship between the supporting leg 1 and the supporting leg 3 inside, the number of supporting legs 3 is expressed by "n". In order to save space, the present embodiment 2 shares the drawings and the drawing description with the specific embodiment of n=5 in the above-mentioned embodiment 1:

[0159] The supporting leg 1 in the present embodiment 2 is the same as the supporting leg 1 in the above-mentioned embodiment 1.

[0160] The 1st supporting leg in the present embodiment 2 is the same as the 4th supporting leg in the above-mentioned embodiment 1.

[0161] The 2nd supporting leg in the present embodiment 2 is the same as the 5th supporting leg in the above-mentioned embodiment 1.

[0162] The 1st to 3rd supporting legs in the specific embodiment of n=5 in the above-mentioned embodiment 1 are omitted, i.e. the portable tripod in the present embodiment 2. Therefore, the portable tripod in the present embodiment 2 is more compact and portable, and is mainly suitable for mobile phone photography, etc.

[0163] As shown in FIG. 35 , the tail end of the supporting leg 1 is provided with a limiting hole 101. As shown in ​ , ​ , ​ and ​As shown in the drawings, the first section support leg first end is respectively provided with a positioning hole 601 and a positioning device 6, the positioning device 6 comprises a base 61, a positioning spring 62, a positioning shaft 63 and a positioning track 64, the positioning track 64 is installed in the base 61 and coaxial with the positioning hole 601, the positioning spring 62 is arranged in the middle of the positioning track 64, the positioning shaft 63 is respectively arranged on both sides of the positioning spring 62, the positioning shaft 63 can move on the positioning track 64 and is coaxial with the positioning hole 601, the positioning shaft 63 is provided with a protruding clamping block 631 in the middle.

[0164] When the first section support leg is stretched out, the positioning shaft 63 of the first section support leg enters the support leg tail end limiting hole 101 under the action of the positioning spring 62, at this time, the first section support leg positioning shaft 63 is clamped by the support leg tail end limiting hole 101, and the first section support leg is fixed and cannot be stretched out again. The first section support leg tail end is provided with a limiting ring 303, which can prevent the first section support leg tail end from being separated from the first section support leg tail end. The first section support leg tail end is provided with an unlocking block 611, the unlocking block 611 is provided with an unlocking hole 610, and the unlocking hole 610 on the unlocking block 611 is matched with the clamping block 631 in the middle of the positioning shaft 63 of the first section support leg tail end.

[0165] As shown in the drawings, ​ , ​ , ​ , ​ and ​ , the first section support leg tail end is provided with a limiting ring 303, which can prevent the first section support leg tail end from being separated from the first section support leg tail end. The first section support leg tail end is provided with an unlocking block 611, the unlocking block 611 is provided with an unlocking hole 610, and the unlocking hole 610 on the unlocking block 611 is matched with the clamping block 631 in the middle of the positioning shaft 63 of the first section support leg tail end.

[0166] Further, as shown in the drawings, ​ , ​ , ​ , ​ and ​ , the first section support leg tail end is provided with a limiting ring 303, which can prevent the first section support leg tail end from being separated from the first section support leg tail end. The first section support leg tail end is provided with an unlocking block 611, the unlocking block 611 is provided with an unlocking hole 610, and the unlocking hole 610 on the unlocking block 611 is matched with the clamping block 631 in the middle of the positioning shaft 63 of the first section support leg tail end.

[0167] The fastening shaft 81 is nested in the n-th section support leg, and can move and rotate in the n-th section support leg. The foot cap 351 is fixedly connected to one end of the fastening shaft 81. The fastening head 83 is fixedly connected to the other end of the n-th section support leg. The other end of the fastening shaft 81 is rotatably connected to the center hole 612 of the unlocking block 611. The fastening spring 82 is nested in the fastening shaft 81, and one end of the fastening spring 82 is fixed to the protruding clasp 811, and the other end of the fastening spring 82 is fixed to the other end of the fastening head 83. The fastening spring 82 is always in a stretched state. The outer side of the unlocking block 611 is slidably connected to the two elastic clamps 831. As shown in ​ , when the outer side of the unlocking block 611 slides to the end of the two elastic clamps 831, the elastic clamps 831 are tightly pressed against the inner wall of the (n-1)-th section support leg, and the n-th section support leg is fixed and cannot move at this time, as shown in ​ , when the outer side of the unlocking block 611 slides to the end of the two elastic clamps 831, the elastic clamps 831 are tightly pressed against the inner wall of the (n-1)-th section support leg, and the n-th section support leg is fixed and cannot move at this time, as shown in

[0168] Of course, there are many ways to achieve the movement of the n-th section support leg at any position of the inner wall of the (n-1)-th section support leg, for example, the fastening device 8 of the n-th section support leg can be directly achieved by designing the n-th section support leg as a micro-elliptical pipe body and setting a micro-elliptical limiting ring 303 at the tail end of the (n-1)-th section support leg. The micro-elliptical pipe body of the n-th section support leg and the micro-elliptical limiting ring 303 at the tail end of the (n-1)-th section support leg can be locked and fastened or unlocked and slid by rotating left and right. In order to unlock the (n-1)-th section support, a circular hole 612 is arranged at the center of the unlocking block 612, and the n-th section support leg is rotatably connected to the center hole 612 of the unlocking block.

[0169] Further, as shown in ​As shown, the cap 351 is provided with a clamping protrusion 3510, the tail end of the n-th supporting leg is provided with a groove 350, and the fastening spring 82 is always in tension. When the unlocking block 611 slides to the end of the two elastic clamping pieces 831, the clamping protrusion 3510 in the cap 351 tightly fits into the groove 350 of the tail end of the n-th supporting leg. At this time, the unlocking block 611 stays at the end of the two elastic clamping pieces 831 under the tension of the fastening spring 82, and the n-th supporting leg is fixed and cannot be moved for a long time. When the n-th supporting leg needs to be moved, the unlocking block 611 slides to the beginning of the two elastic clamping pieces 831, the clamping protrusion 3510 in the cap 351 is separated from the groove 350 of the tail end of the n-th supporting leg and rotates away from the groove at the same time. At this time, the clamping protrusion 3510 in the cap 351 is on the tail end of the n-th supporting leg, and the n-th supporting leg can be easily moved to any position. When the n-th supporting leg is moved to another position, the cap 351 is rotated to align the clamping protrusion 3510 in the cap 351 with the groove 350 of the tail end of the n-th supporting leg, and then the hand is released. The clamping protrusion 3510 in the cap 351 tightly fits into the groove 350 of the tail end of the n-th supporting leg under the tension of the fastening spring 82, thereby realizing long-time fixing in another position.

[0170] In one specific embodiment, the (n-1)-th supporting leg is tubular. Those skilled in the art can easily understand that the (n-1)-th supporting leg can also be directly in the shape of a "parenthesis" in transverse section.

[0171] The supporting leg 1 and the first to n-th supporting legs in this embodiment 2 have the same telescoping principle as in the above-mentioned embodiment 1, and will not be described again here.

[0172] In this specific embodiment, n=2, so the n-th supporting leg is the second supporting leg, and the (n-1)-th supporting leg is the first supporting leg. The reason why the present application uses n is that it is very convenient to express. In addition, it is explained below that the end of all supporting legs 1 and all supporting legs 3 close to the connecting assembly 2 is called the beginning, and the other end is called the tail end.

[0173] Embodiment 3

[0174] The main difference between this embodiment 3 and the above-mentioned embodiment 1 is that the supporting leg 1 is nested with n supporting legs 3 inside, and n=1, that is, the supporting leg 1 is nested with one supporting leg 3 inside. Here, in order to conveniently express the relationship between the supporting leg 1 and the supporting leg 3 inside, the number of supporting legs 3 is expressed by "n". In order to reduce the length, this embodiment 3 and one specific embodiment of n=5 in the above-mentioned embodiment 1 share the same drawing and the same drawing description:

[0175] The support leg 1 described in this embodiment 3 is the same as the support leg 1 described in the above embodiment 1;

[0176] The n th section support leg described in this embodiment 3 is the same as the 5 th section support leg described in the above embodiment 1.

[0177] The 1 st to 4 th section support legs of the n = 5 specific embodiment described in the above embodiment 1 are omitted, which is a portable tripod described in this embodiment 2. Therefore, the portable tripod described in this embodiment 2 is more compact and portable, and is mainly suitable for mobile phone photography, etc.

[0178] Similarly ​ and ​ The tail end of the support leg 1 is provided with a limiting ring 303. The n th section support leg is provided with a fastening device 8, which is suitable for cooperating with the inner wall of the support leg 1. The tail end of the n th section support leg is provided with a foot cap 351.

[0179] Further, similarly ​ , ​ , ​ , ​ and ​ The fastening device 8 includes a fastening shaft 81, a fastening spring 82 and a fastening head 83. The fastening shaft 81 is provided with a protruding clasp 811 in the middle. The fastening head 83 is provided with two elastic clamping pieces 831 protruding at one end. The center of the fastening head 83 is provided with a round hole 830. The center of the unlocking block 611 is provided with a round hole 612.

[0180] The fastening shaft 81 is nested in the n th section support leg, and the fastening shaft 81 can move and rotate in the n th section support leg. The foot cap 351 is fixedly connected with one end of the fastening shaft 81. The other end of the fastening head 83 is fixedly connected with the first end of the n th section support leg. The other end of the fastening shaft 81 is rotatably connected with the center round hole 612 of the unlocking block 611. The fastening spring 82 is nested in the fastening shaft 81, one end of the fastening spring 82 is fixed to the protruding clasp 811, and the other end of the fastening spring 82 is fixed to the other end of the fastening head 83. The fastening spring 82 is always in a stretched state. The outer side of the unlocking block 611 is slidably connected with the two elastic clamping pieces 831. Similarly ​ When the outer side of the unlocking block 611 slides to the end of the two elastic clamping pieces 831, the elastic clamping pieces 831 are tightly pressed against the inner wall of the support leg 1, that is, the n th section support leg is fixed and cannot move at this time. Similarly ​As shown, when the unlocking block 611 slides to the first end of the two elastic clamping pieces 831, the elastic clamping pieces 831 can slide on the inner wall of the support leg 1 easily, so that the movement of the nth support leg at any position on the inner wall of the support leg 1 is realized, that is, the nth support leg and the support leg 1 can be adjusted to different support heights, and the applicability of the tripod is improved.

[0181] Of course, there are many ways to realize the movement of the nth support leg at any position on the inner wall of the support leg 1, for example, the fastening device 8 of the nth support leg can be realized by designing the nth support leg as a micro-elliptical pipe body and setting a micro-elliptical limiting ring 303 at the tail end of the support leg 1, and the micro-elliptical pipe body of the nth support leg and the micro-elliptical limiting ring 303 at the tail end of the (n-1)th support leg can be locked or unlocked by rotating left and right.

[0182] Further, as shown, ​ The fastening spring 82 is always in a stretched state, when the unlocking block 611 slides to the tail end of the two elastic clamping pieces 831, the clamping protrusion 3510 in the cap 351 is tightly matched with the groove 350 at the tail end of the nth support leg, at this time, under the tension of the fastening spring 82, the unlocking block 611 will stay at the tail end of the two elastic clamping pieces 831, realizing that the nth support leg is fixed for a long time and cannot be moved. When the nth support leg needs to be moved, slide the unlocking block 611 to the first end of the two elastic clamping pieces 831, the clamping protrusion 3510 in the cap 351 is separated from the groove 350 at the tail end of the nth support leg and rotates away from the groove, at this time, the clamping protrusion 3510 in the cap 351 is on the tail end of the nth support leg, at this time, the nth support leg can be moved to any position easily, when moved to another position, rotate the cap 351 to align the clamping protrusion 3510 in the cap with the groove 350 at the tail end of the nth support leg, then release the hand, the clamping protrusion 3510 in the cap is tightly matched with the groove 350 at the tail end of the nth support leg under the tension of the fastening spring 82, thereby realizing the long-time fixation at another position.

[0183] Embodiment 4

[0184] On the basis of the structure of the portable tripod described in Embodiment 1, the portable tripod provided in Embodiment 4 further comprises a positioning hole guiding system arranged in the support leg and the first to (n-1)th nested support feet, which guides the positioning shaft 63 to enter the limiting hole 101 and / or the limiting hole 301 under the action of the positioning spring 62 when the first to (n-1)th nested support feet are stretched out. In this embodiment, the positioning hole guiding system can prevent the positioning shaft 63 from deviating from the limiting hole 101 and / or the limiting hole 301 due to misalignment when the first to (n-1)th nested support feet are stretched out.

[0185] In a further aspect, as shown in ​ 、 ​ 、 ​ and ​ , the positioning hole guiding system comprises a groove piece 72 and a protruding piece 71, the groove piece 72 is respectively nested and fixed on both sides of the tail end of the support leg 1 and the tail end of the first to (n-2)th nested support feet, the groove of the groove piece 72 faces the connecting assembly 2, and the protruding piece 71 is respectively fixed and installed on both sides of the base 61 of the positioning device 6 in the first to (n-1)th nested support feet, the protrusion of the protruding piece 71 faces the foot cap 351. When the first to (n-1)th nested support feet are stretched out, the protruding piece 71 of the first to (n-1)th nested support feet cooperates with the groove piece 72 of the support leg 1 and the first to (n-2)th nested support feet and guides the corresponding positioning shaft 63 to enter the corresponding limiting hole 101 and / or the limiting hole 301 under the action of the corresponding positioning spring 62. For example, when the first nested support foot is stretched out, the protruding piece 71 of the first nested support foot cooperates with the groove piece 72 of the support leg 1 and guides the positioning shaft 63 of the first nested support foot to enter the limiting hole 101 of the support leg 1 under the action of the positioning spring 62 thereof, when the second nested support foot is stretched out, the protruding piece 71 of the second nested support foot cooperates with the groove piece 72 of the first nested support foot and guides the positioning shaft 63 of the second nested support foot to enter the limiting hole 301 of the first nested support foot under the action of the positioning spring 62 thereof, and the following is similar.

[0186] In another further aspect, as shown in ​As shown, the positioning hole guiding system is a track groove 73, which is arranged on both sides of the support leg 1 and the inner sides of the first to (n-2)th support feet, respectively. One end of the track groove 73 terminates at the limiting holes 101 on both sides of the tail end of the support leg and the limiting holes 301 on both sides of the tail end of the first to (n-2)th support feet, respectively. The other end of the track groove 73 terminates at the limiting holes on both sides of the head end of the support leg and the limiting holes on both sides of the head end of the first to (n-2)th support feet, respectively. When the first to (n-1)th support feet are unfolded, the positioning shafts 63 of the first to (n-1)th support feet reach and enter the corresponding limiting holes 101 and / or limiting holes 301 under the guidance of the track groove 73 and the action of the positioning springs 62. For example, when the first support foot is unfolded, the positioning shaft 63 of the first support foot reaches and enters the limiting holes 101 on both sides of the support leg 1 under the guidance of the track groove 73 and the action of the positioning spring 62. When the second support foot is unfolded, the positioning shaft 63 of the second support foot reaches and enters the limiting hole 301 of the first support foot under the guidance of the track groove 73 and the action of the positioning spring 62. The same applies to the following.

[0187] Of course, the positioning hole guiding system in this embodiment 4 can also be a combination of the above two further schemes, that is, the positioning hole guiding system simultaneously includes the above two further schemes.

[0188] Embodiment 5

[0189] On the basis of the structure of the portable tripod in the above-mentioned embodiment 2, the portable tripod provided in this embodiment 5 further includes a positioning hole guiding system arranged in the support leg and the first support foot nested inside in turn. When the first support foot is unfolded, the positioning hole guiding system guides the positioning shaft 63 to enter the limiting hole 101 under the action of the positioning spring 62. In this embodiment, the positioning hole guiding system can prevent the positioning shaft 63 from deviating from the limiting hole 101 due to misalignment when the first support foot is unfolded.

[0190] In one further scheme, as shown in FIG. 8, the positioning hole guiding system is a track groove 73 arranged on both sides of the support leg 1 and the inner sides of the first to (n-2)th support feet, respectively. One end of the track groove 73 terminates at the limiting holes 101 on both sides of the tail end of the support leg and the limiting holes 301 on both sides of the tail end of the first to (n-2)th support feet, respectively. The other end of the track groove 73 terminates at the limiting holes on both sides of the head end of the support leg and the limiting holes on both sides of the head end of the first to (n-2)th support feet, respectively. ​ and ​As shown, the positioning hole guiding system comprises groove pieces 72 and protruding pieces 71, the groove pieces 72 are fixedly nested on both sides of the tail end of the support leg 1, the grooves of the groove pieces 72 are directed towards the connecting assembly 2, the protruding pieces 71 are respectively fixedly installed on both sides of the base 61 of the positioning device 6 in the first section support leg, the protrusions of the protruding pieces 72 are directed towards the toe cap 351. When the first section support leg is stretched out, the protruding pieces 71 of the first section support leg cooperate with the groove pieces 72 of the support leg 1 and guide the corresponding positioning shaft 63 to enter the corresponding positioning hole 101 under the action of the corresponding positioning spring 62.

[0191] In another further scheme, as shown in the following embodiment 5, ​ the positioning hole guiding system is a track groove 73, the track groove 73 is arranged on both sides of the support leg 1, one end of the track groove 73 terminates at the limiting hole 101 on both sides of the tail end of the support leg 1, the other end of the track groove 73 terminates at both sides of the head end of the support leg 1. When the first section support leg is stretched out, the positioning shaft 63 of the first section support leg reaches and enters the corresponding limiting hole 101 under the guidance of the track groove 73 and the action of the positioning spring 62.

[0192] Of course, the positioning hole guiding system in the embodiment 5 can also be a combination of the above two further schemes, that is, the positioning hole guiding system simultaneously comprises the above two further schemes.

Claims

1. A portable tripod, characterized in that, include: Connecting components, The first to third support legs have their ends rotatably connected to the connecting assembly. Each support leg has at least one nested support foot. The first to third support legs and their respective internal support feet can be folded inward to form a compact hollow column. The central cross-section of the support leg is a 1 / 3 hollow ring. The support leg includes a pair of side walls, an upper arc-shaped wall, and a lower arc-shaped wall. The pair of side walls, the upper arc-shaped wall, and the lower arc-shaped wall form a ring-shaped tube. The side walls of the support leg include an upper side wall and a lower side wall. Each pair of side walls faces each other to form a bracket shape. The upper and lower openings of the bracket shape are smaller than the diameter of the largest side wall inside the bracket shape. The central axis tube is nested in the connecting assembly. The first to third support legs and their respective internal support feet can be folded inward to form a compact hollow column that can fit tightly with the central axis tube. The supporting leg contains n nested supporting feet, where n is a positive integer ≥ 2. The support leg has a limit hole at its tail end. The first to (n-1)th support legs are respectively provided with positioning holes and positioning devices at their ends. The positioning device includes a base, a positioning spring, a positioning shaft, and a positioning rail. The positioning rail is installed in the base and is coaxial with the positioning hole. The positioning spring is located in the middle of the positioning rail. The positioning shaft is located on both sides of the positioning spring. The positioning shaft can move on the positioning rail and is coaxial with the positioning hole. A protruding locking block is provided in the middle of the positioning shaft. When the first support leg extends, the positioning shaft enters the limiting hole under the action of the positioning spring. The (n-1)th section of the support leg has a limit ring at its tail end. The nth support leg has an unlocking block at its first end, and the unlocking block has an unlocking hole that is adapted to engage with the (n)th support leg. 1) The locking block protruding in the middle of the positioning shaft at the head end of the support leg engages with it. The nth support leg is equipped with a fastening device, which is adapted to mate with the inner wall of the (n-1)th support leg. When n is ≥3, the transverse cross-section of the support legs from the 1st to the (n-2nd)th section is bracket-shaped. Limiting holes and retaining rings are respectively provided at the tail ends of the first to (n-2)th support legs. The retaining rings are fixedly installed at the tail ends of the first to (n-2)th support legs. When the second to (n-1)th support legs extend, the corresponding positioning shafts enter the corresponding positioning holes under the action of the corresponding positioning springs. Unlocking holes are provided on the bases at the beginning of the support legs from the 2nd to the (n-1th)th sections. These unlocking holes are respectively adapted to engage with the locking blocks protruding from the center of the positioning shafts at the beginning of the support legs from the 1st to the (n-2th)th sections. The fastening device includes a fastening shaft, a fastening spring, and a fastening head. A protruding retaining ring is located in the middle of the fastening shaft. Two elastic clips protrude from one end of the fastening head. A circular hole is located in the center of the fastening head, and a circular hole is located in the center of the unlocking block. The fastening shaft is nested inside the nth support leg. The fastening shaft can move and rotate within the nth support leg. The foot cap is fixedly connected to one end of the fastening shaft. The other end of the fastening head is fixedly connected to the first end of the nth support leg. The other end of the fastening shaft is rotatably connected to the central hole of the unlocking block. The fastening spring is nested inside the fastening shaft. One end of the fastening spring is fixed to the protruding retaining ring. The other end of the fastening spring is fixed to the other end of the fastening head. The outer side of the unlocking block can slide with two elastic clips. When the outer side of the unlocking block slides to the end of the two elastic clips, the elastic clips are tightly pressed against the inner wall of the (n-1)th support leg. When the outer side of the unlocking block slides to the first end of the two elastic clips, the elastic clips can slide easily against the inner wall of the (n-1)th support leg.

2. A portable tripod according to claim 1, characterized in that, After the first to third supporting legs fold inwards and the body is folded together, the lower sidewalls of each pair of adjacent legs fit together.

3. A portable tripod according to claim 1, characterized in that, After the first to third supporting legs fold inward, there is a certain gap between the adjacent lower side walls of each pair.

4. A portable tripod according to claim 1, characterized in that, The connecting assembly includes a connecting base, a locking knob, and a locking ring. The connecting base has an inner ring shape, and the outer side of the connecting base has three outwardly protruding base heads and at least one locking threaded hole. The locking threaded hole is threadedly connected to the locking knob. The locking ring is coaxial with the connecting base. The first end of the support leg includes a connector that is rotatably connected to the base head.

5. A portable tripod according to any one of claims 1 to 3, characterized in that, It also includes a bracket fixing device, which includes three pairs of bracket rails, three pairs of bracket rods and bracket connectors. The three pairs of bracket rails are respectively installed on the lower ends of the upper side walls of the first to third support legs. The three pairs of bracket rods are slidably installed on the three pairs of bracket rails, and at least one end of the bracket rod does not detach from the bracket rail. The other ends of the three pairs of bracket rods are rotatably installed on the bracket connectors.

6. A portable tripod according to claim 5, characterized in that, The inside of the support track is a cylindrical cavity, and the outside of the support track is provided with a long strip opening with a width smaller than the diameter of the cylindrical cavity. The long strip opening is suitable for fitting with the support rod.

7. A portable tripod according to claim 5, characterized in that, The bracket connector includes a bracket plate and three protruding claws. The three protruding claws are located outside the bracket plate and are arranged at an angle of 120 degrees to each other. The ends of the protruding claws have two openings with an angle of 120 degrees. The openings are provided with spherical cavities. The two ends of the bracket rod are protruding spheres. The spherical cavities are suitable for rotatable connection with the protruding spheres at the other end of the bracket rod.

8. A portable tripod according to claim 7, characterized in that, The bracket connector also includes a bracket shaft. The bracket disk has a hollow hole in the center. The upper end of the bracket shaft has a threaded structure. The upper end of the bracket shaft is threaded to the lower end of the central tube. The middle part of the bracket shaft is rotatably connected to the hollow hole in the center of the bracket disk. The lower end of the bracket shaft is provided with a retaining pin and a dome. The lower end of the bracket shaft can be connected to the mounting hole at the bottom of the gimbal through the retaining pin and the dome.

9. A portable tripod according to claim 8, characterized in that, The support track has a certain degree of elasticity.

10. A portable tripod according to claim 1, characterized in that, The central tube is a single tube with a retaining shaft and a dome at the upper end and a threaded hole at the lower end. The central tube can be connected to the mounting hole at the bottom of the gimbal through the retaining shaft and the dome.

11. A portable tripod according to claim 1, characterized in that, At least one central tube is installed inside the central tube. The central tube and the central tubes and central tubes are telescopically connected to each other. The lower end of the central tube is provided with a threaded hole. The upper end of the innermost central tube is provided with a retaining shaft and a dome. The innermost central tube is connected to the mounting hole at the bottom of the gimbal through the retaining shaft and the dome.

12. A portable tripod according to claim 1, characterized in that, The support leg has n supporting feet nested inside it, and the nth supporting foot has a foot cap at its tail end.

13. A portable tripod according to claim 1, characterized in that, The unlocking block has a circular hole in the center. The first end of the nth support leg is rotatably connected to the circular hole in the center of the unlocking block. The fastening device includes the micro-elliptical tube of the nth support leg and the micro-elliptical limiting ring at the tail end of the (n-1)th support leg. The micro-elliptical tube of the nth support leg and the micro-elliptical tube of the nth support leg can be locked and fastened or unlocked and slidably engaged by rotating left and right.

14. A portable tripod according to claim 1, characterized in that, When n≥3, the height of the bracket-shaped brackets in all transverse sections of the support legs from section 1 to section (n-2) is the same.

15. A portable tripod according to claim 1, characterized in that, The (n-1)th support leg is tubular.

16. A portable tripod according to claim 1, characterized in that, The foot cap has a locking protrusion inside, and the end of the nth support foot has a groove. The fastening spring is always in a stretched state. When the outer side of the unlocking block slides to the end of the two elastic clips, the locking protrusion inside the foot cap is tightly engaged with the groove at the end of the nth support foot. When the outer side of the unlocking block slides to the beginning of the two elastic clips, the locking protrusion inside the foot cap disengages from the groove at the end of the nth support foot and rotates away from the groove opening.

17. A portable tripod according to claim 12, characterized in that, When n≥3, it also includes a positioning hole guiding system. The positioning hole guiding system is set in the support leg and the first to (n-1)th support legs nested inside. When the first to (n-1)th support legs are extended, the positioning shafts guided by the positioning hole guiding system enter the limiting hole under the action of the positioning spring.

18. A portable tripod according to claim 17, characterized in that: The positioning hole guiding system includes grooved plates and raised plates. The grooved pieces are nested and fixed to both sides of the tail end of the support leg and both sides of the tail end of the first to (n-2)th support legs, with the grooves of the grooved pieces facing the connecting assembly. The protruding pieces are fixedly installed on both sides of the base of the positioning device in the first to (n-1)th support legs, with the protrusions of the protruding pieces facing the foot caps. When the first to (n-1)th support legs are extended, the protrusions of the first to (n-1)th support legs engage with the grooves of the support legs and the first to (n-2)th support legs, respectively, and guide the corresponding positioning shafts into the corresponding limiting holes under the action of the corresponding positioning springs.

19. A portable tripod according to claim 17, characterized in that, The positioning hole guidance system is a track groove, which is respectively set on both sides of the support leg and the inner sides of the first to (n-2)th support foot. One end of the track groove terminates at the limiting holes on both sides of the tail end of the support leg and the limiting holes on both sides of the tail end of the first to (n-2)th support foot. The other end of the track groove terminates at both sides of the head end of the support leg and the head end of the first to (n-2)th support foot.

20. A portable tripod according to claim 12, characterized in that, When n=2, it also includes a positioning hole guiding system. The positioning hole guiding system is set in the support leg and the first support foot nested inside. When the first support foot is extended, the positioning shaft guided by the positioning hole guiding system enters the limiting hole under the action of the positioning spring.

21. A portable tripod according to claim 20, characterized in that, The positioning hole guiding system includes grooved plates and raised plates. The grooved pieces are nested and fixed to both sides of the tail end of the support leg, with the grooves of the grooved pieces facing the connecting assembly. The protruding pieces are fixedly installed on both sides of the base of the positioning device in the first support leg, with the protrusions of the protruding pieces facing the foot cap. When the first support leg extends, the protruding piece of the first support leg engages with the grooved piece of the support leg and guides the corresponding positioning shaft into the corresponding positioning hole under the action of the corresponding positioning spring.

22. A portable tripod according to claim 20, characterized in that, The positioning hole guidance system is a track groove, which is set on both sides of the support leg. One end of the track groove terminates at the limiting holes on both sides of the tail end of the support leg, and the other end of the track groove terminates at both sides of the head end of the support leg.

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