CN102829300A - A camera photography balance bracket - Google Patents

Abstract

The invention discloses a camera shooting and photographing balance support which comprises a universal joint component, wherein the universal joint component comprises a universal shaft sleeve, the universal shaft sleeve is provided with an arc-shaped cavity, a universal ball valve is arranged in the cavity, the shaft center of the universal ball valve is provided with a connecting shaft, a handle component is connected onto the universal shaft sleeve, the upper end of the connecting shaft is connected with a fixing component, the lower end of the connecting shaft is connected with a counterweight component, the gravity center balance during handheld shooting is realized, the shake during handheld shooting can be reduced, the blank in the field of handheld shooting supports of card-type digital cameras and mobile phone digital products can be filled, a fixed support structure suitable for high-shooting, middle-shooting and low-shooting and a handheld support structure suitable for self-shooting can be formed by combining the components, the functions are rich, the card-type digital cameras, mobile phones, single-reflex cameras and camera digital products can be, Fixed high shot, middle shot, low shot, auto heterodyne, etc.

Description

A camera photography balance bracket

technical field

The invention relates to a photographic equipment, in particular to a balanced support frame suitable for supporting card type digital cameras and mobile phone digital products.

Background technique

Card-type digital cameras have become a must-have item for consumers traveling at home due to their small size and easy portability. The use of mobile phones is more common. Almost all existing mobile phones have camera and video functions. In terms of effect, it is close to that of card-type digital cameras. In daily life, people will use card-type digital cameras and mobile phones to record every bit of life, but the existing tripods are mainly aimed at SLR cameras and shoulder-mounted cameras. Fixed shooting of large digital products is not suitable for handheld shooting of digital card cameras and mobile phone digital products.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a camera and photography balance bracket suitable for supporting card-type digital cameras and mobile phone digital products for handheld shooting.

The technical solution adopted by the present invention to solve its technical problems is:

A camera photography balance bracket, comprising a universal joint assembly, the universal joint assembly includes a universal bushing, the universal bushing is provided with an arc-shaped cavity, and a universal ball valve is installed in the cavity, The axis of the universal ball valve is provided with a connecting shaft, the universal shaft sleeve is connected with a handle assembly, the upper end of the connecting shaft is connected with a fixing assembly for fixing a digital camera or a mobile phone, and the lower end of the connecting shaft is connected to There is a counterweight assembly.

The arc-shaped cavity is formed by a cylindrical hole and two snap rings respectively fixed at the upper and lower ends of the cylindrical hole.

The weight assembly includes a first leg assembly and a second leg, the upper end of the first leg assembly is hinged to the lower end of the connecting shaft, the lower end of the first leg assembly is connected to the second leg The upper end of the tube is hinged.

The first leg tube assembly is a telescopic structure composed of several nested sleeves, the sleeves are eccentric tubes, wherein, except for the innermost sleeve, the upper ends of the other sleeves are inserted with As for the locking sleeve, except for the outermost casing, the lower ends of the other casings are inserted with anti-drilling sleeves.

The connecting shaft is composed of an upper connecting shaft and a lower connecting shaft. The outer wall of the upper end of the upper connecting shaft is provided with threads to form a first threaded rod, and the lower end is provided with a concave screw hole to form a second screw hole. The hole is matched with the thread of the first threaded rod, and the upper and lower ends of the lower connecting shaft are provided with second threads matching the threads of the second screw hole, so that the upper and lower ends of the lower connecting shaft respectively form second threads rod and a third threaded rod, the third threaded rod is threadedly connected with a first hinge, the first hinge is hinged with a second joint through the first hinge shaft, and the end of the second hinge is provided with a A fourth threaded hole that is threadedly matched with the first threaded rod, and a fourth threaded rod that is threadedly matched with the fourth threaded hole is provided on the upper end of the innermost sleeve.

The lower end of the outermost casing is threaded with a third hinge, and the third hinge is hinged with a fourth hinge through a second hinge shaft, and the lower end of the fourth hinge is provided with a threaded joint with the first thread. A fifth threaded hole matched with the rod, the upper end of the second leg tube is provided with a fifth threaded rod matched with the fifth threaded hole.

Both the locking sleeve and the anti-drilling sleeve are ring-shaped with openings, the outer wall of the locking sleeve is provided with a positioning step, the upper end of the sleeve is provided with a positioning hole, and the locking sleeve is installed on the sleeve After the upper end of the casing, the positioning step is stuck in the positioning hole; the outer wall of the anti-drilling sleeve is provided with a limiting step, and the lower end of the casing is provided with a limiting hole, and the anti-drilling sleeve is installed on the sleeve After the lower end of the tube enters, the limiting step is stuck in the limiting hole.

The lower end of the second leg tube is connected with a support assembly, the support assembly is composed of a support and three support feet hinged on the support at 120 degrees to each other, and the three support feet are folded and inserted into the In the second leg tube, the inner wall at the lower end of the second leg tube is provided with an eighth internal thread, and the outer walls at both ends of the support member are provided with eighth external threads matching the eighth internal thread, and the support member The ninth threaded rods are arranged on the upper and lower ends of the upper and lower ends.

The counterweight assembly also includes a counterweight block, the counterweight block is formed by connecting several counterweight blocks, and the upper side of the counterweight block is provided with a sixth screw hole that is threadedly matched with the ninth threaded rod , the lower side is provided with a sixth screw with the same thread as the ninth threaded rod.

The fixed assembly is a clip assembly, and the clip assembly includes a fixed clamp and a movable clamp. The fixed clamp is provided with an insertion hole, and the inner wall of the insertion hole is stepped. A spring is installed, and the two ends of the movable clamp pass through the axis of the spring, and the end is threaded with a nut. One end of the spring is against the step surface of the inner wall of the insertion hole, and the other end is against the bottom of the nut. end face.

The beneficial effects of the present invention are: the balance bracket for photography and photography of the present invention adopts the method of setting a counterweight assembly under the universal joint assembly, which realizes the balance of the center of gravity when shooting by hand, can reduce the shake when shooting by hand, and can fill the card type. There is a gap in the field of handheld shooting brackets for digital cameras and mobile phone digital products. The components can also be combined to form a fixed support structure suitable for high, medium, and low shots, as well as a handheld support structure for selfies. It has rich functions and can be widely used in supports. Card-type digital cameras, mobile phones, SLR cameras and video camera digital products, realize the functions of handheld shooting, fixed high shooting, medium shooting, low shooting and self-timer.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the structural schematic diagram of the first combination mode of the present invention;

Fig. 2 is a schematic diagram of an exploded structure of a universal joint assembly;

Fig. 3 is a schematic diagram of an exploded structure of the present invention;

Fig. 4 is the structural representation of clip assembly;

5 is a schematic diagram of an exploded structure of a clip assembly;

Fig. 6 is a schematic diagram of the elongated structure of the first leg tube assembly;

Fig. 7 is a schematic diagram of an exploded structure of part of the first leg assembly;

Fig. 8 is a section view of part of the leg tube in the contracted state of the first leg tube assembly;

Fig. 9 is a cross-sectional view of part of the leg tube in the extended state of the first leg tube assembly;

Fig. 10 is a schematic cross-sectional structure diagram of part of the leg of the first leg assembly;

Figure 11 is an enlarged view shown at A place in Figure 10;

Fig. 12 is a schematic structural diagram of a second combination mode of the present invention;

Figure 13 One of the exploded structural schematic diagrams of the second leg tube and support assembly;

Fig. 14 is the second schematic diagram of the exploded structure of the second leg tube and the support assembly;

Fig. 15 is a structural schematic diagram of the support assembly hidden in the second leg tube;

Fig. 16 is a schematic structural diagram of a third combination mode of the present invention;

Fig. 17 is a schematic structural diagram of a fourth combination mode of the present invention;

Fig. 18 is a schematic structural diagram of a fifth combination mode of the present invention;

Fig. 19 is a schematic structural diagram of the sixth combination mode of the present invention;

Fig. 20 is a schematic structural diagram of the seventh combination mode of the present invention;

Fig. 21 is a schematic structural diagram of the eighth combination mode of the present invention;

Fig. 22 is a schematic structural diagram of the ninth combination mode of the present invention;

Fig. 23 is a schematic structural diagram of the tenth combination mode of the present invention;

Fig. 24 is a schematic structural view of a counterweight;

Fig. 25 is a schematic diagram of an exploded structure of a counterweight;

Fig. 26 is a schematic diagram of the disassembled position of the parts of the present invention when carried.

Detailed ways

Referring to Fig. 1 to Fig. 26, a camera balance bracket includes a universal joint assembly 2, the universal joint assembly 2 includes a universal bushing 200, and the universal bushing 200 is provided with an arc-shaped cavity, The arc-shaped cavity is composed of a cylindrical hole 25 and snap rings 202 and 203 mounted on both ends of the cylindrical hole 25 through threads. A universal ball valve 201 is installed in the cavity, the axis of the universal ball valve 201 is provided with a connecting shaft, the upper end of the connecting shaft is connected with a fixing assembly 1 for fixing a digital camera or a mobile phone, the connecting shaft The lower end is connected with a counterweight assembly 3 .

A handle assembly is connected to the universal bushing 200, and the handle assembly is composed of a support rod 21 and a handle 22. The front end of the support rod 21 is connected to the universal bushing 200, and the side wall at the rear end is provided with A sixth screw hole (not shown in the figure), the upper end of the handle 22 is provided with a sixth stud member 220 threadedly matched with the sixth screw hole.

Described connecting shaft is made of upper connecting shaft 205 and lower connecting shaft 204, and the upper end outer wall of described upper connecting shaft 205 is provided with screw thread and forms first threaded rod 2050, and the lower end is provided with concave screw hole to form second screw hole (Fig. not shown), the upper and lower ends of the lower connecting shaft 204 are provided with threads, so that the upper and lower ends respectively form a second threaded rod 2040 and a third threaded rod 2041, and the second threaded rod 2040 is screwed on the A connecting shaft is formed in the second threaded hole. After the connecting shaft is inserted into the axial center hole of the universal ball valve 201 from top to bottom, the end surface of the upper connecting shaft 205 abuts against the end surface of the universal ball valve 201 .

The counterweight assembly includes a first leg assembly 30 and a second leg assembly 31, the upper end of the first leg assembly 30 is hinged to the lower end of the connecting shaft, the lower end of the first leg assembly 30 is connected to the The upper end of the second leg pipe 31 is hinged.

Referring to FIG. 6 to FIG. 10 , in which FIG. 7 to FIG. 10 illustrate the structure of the first leg tube assembly by taking two bushings as an example. The first leg tube assembly 30 is a telescopic structure composed of several mutually nested sleeves 303, 303'. The mutual nesting here means that the diameters of the sleeves are sequentially increased from small to large, and the sleeves with small diameters The tube 303 is threaded in a sleeve 303' which is only slightly larger than its diameter.

As shown in Figure 8 and Figure 9, the sleeves 303, 303' are eccentric tubes, such as 8 is a cross-sectional view of the sleeves 303, 303' after contraction, and Figure 9 is the extension and fixation of the sleeves 303, 303' When stretching, pull out the sleeve 303 located on the inner side, then twist the sleeve 303 counterclockwise, the sleeve 303 can be locked, and when it is closed, hold the sleeve 303 and twist it clockwise. By making the inner sleeve 303 and the outer sleeve 303' concentric, the sleeve 303 can be pressed into the sleeve 303'.

Among them, except for the innermost casing, the upper end nozzles of the other casings are inserted with locking sleeves 304. The pipe is a metal pipe, and the locking sleeve 304 is a plastic or plastic part. The locking sleeve 304 can produce elastic deformation to clamp the casing. The function of the anti-drilling sleeve is to prevent the casing from being pulled out from other casings. Refer to Figure 11 , After the casing is pulled out, the locking sleeve blocks the anti-drilling sleeve, which can play an anti-drilling role.

Referring to Figure 7, the locking sleeve 304 is an open ring, the outer wall of the locking sleeve 304 is provided with a positioning step 3041, the upper end of the sleeve 303, 303' is provided with a positioning hole 3031, the locking After the sleeve 304 is installed in the upper ends of the sleeves 303 and 303 ′, the positioning step 3041 is stuck in the positioning hole 3031 .

The anti-drilling sleeve 305 is also ring-shaped with an opening, the outer wall of the anti-drilling sleeve 305 is provided with a limit step 3051, and the lower ends of the sleeves 303, 303' are provided with a limited hole 3032, and the anti-drilling sleeve 35 is installed After being inside the lower ends of the sleeves 303 , 303 ′, the limiting step 3051 is locked in the limiting hole 3032 .

The locking sleeve 304 and the anti-drilling sleeve 305 are plastic parts or plastic parts. If the locking sleeve 304 and the anti-drilling sleeve 305 have no openings but are a complete ring, it takes a lot of effort to assemble them. Press the locking sleeve 304 and the anti-drilling sleeve 305 into the sleeves 303 and 303', if the positioning step 3041 is not aligned with the positioning hole 3031, the limiting step 3051 is not aligned with the limiting hole 3032, it will be difficult to adjust , the locking sleeve 304 and the anti-drilling sleeve 205 are ring-shaped openings, and the locking sleeve 304 and the anti-drilling sleeve 205 are pinched by hand in the assembly type to make them elastically deform and shrink, and put them into the sleeves 303, 303', and Rotate the position so that the positioning step 3041 is aligned with the positioning hole 3031, or the limiting step 3051 is aligned with the limiting hole 3032 and then let go, the elastic action of the locking sleeve 304 and the anti-drilling sleeve 205 will naturally restore the shape, so that the positioning step 3041 is stuck in the positioning position. The hole 3031 or the limiting step 3051 is stuck in the limiting hole 3032, which is convenient and simple to assemble.

The lower end of the outermost sleeve pipe is threadedly connected with a third hinge 209, and the third hinge 209 is hinged with a fourth hinge 208 through a second hinge, on which a second hinge is mounted. The locking knob 207 is rotated to loosen or lock the third hinge 209 and the fourth hinge 208 . The lower end of the fourth hinge 208 is provided with a fifth threaded hole (not shown in the figure), and the upper end of the second leg tube 30 is provided with a fifth threaded rod 310, which can be screwed In the fifth threaded hole, the first leg tube assembly and the second leg tube are connected.

The third threaded rod 2041 is screwed with the first hinge part 24, and the first hinge part 24 is hinged with the second joint part 302 through the first hinge shaft 301, and the first locking knob is installed on the first hinge shaft 301 206 , turning the locking knob 206 to loosen or lock the third hinge 209 and the fourth hinge 208 . The end of the second hinge 302 is provided with a fourth threaded hole (not shown in the figure), the upper end of the innermost sleeve is provided with a fourth threaded rod, and the fourth threaded rod is screwed on the In the fourth threaded hole, connect the universal joint component and the first leg tube component.

Referring to Fig. 3, the lower end of the second leg pipe 31 is threadedly connected with a support assembly 32, the support assembly is composed of a support 320 and three support feet 321 hinged on the support 320 at 120 degrees to each other, The three supporting legs 321 are folded and inserted into the second leg tube 31, the inner wall of the lower end of the second leg tube 31 is provided with an eighth internal thread (not shown in the figure), and the two supporting members 320 The outer wall of the end is provided with an eighth external thread 323 that matches the eighth internal thread, and the support assembly 32 can be connected to the lower end of the second leg pipe 31 through the cooperation of the eighth internal thread and the eighth external thread in a forward or reverse direction. . Both upper and lower ends of the support member 320 are provided with ninth threaded rods 322 , which are mainly used for connecting counterweights.

Referring to Fig. 3, Fig. 4 and Fig. 5, the fixed assembly 1 is composed of a clip assembly 10 and a first connector 11, and the clip assembly 10 is composed of a fixed clamp 101 and a movable clamp 102, and the movable clamp The piece 102 is provided with a handle piece 103, and the fixed clamping piece 101 is provided with an insertion hole 104. The inner wall of the insertion hole 104 is stepped, and a spring 105 is installed in the insertion hole 104, and the two ends of the movable clamping piece 102 After passing through the axis of the spring 105, the end is threaded with a nut 106, that is, the upper end of the spring 105 is against the step surface of the inner wall of the insertion hole 104, and the other end is against the end face of the nut 106. 103 pull out the movable clamping part 102, put the mobile phone or digital card camera into the clamping mouth formed by the movable clamping part 102 and the fixed clamping part 101. The function moves down to clamp the mobile phone or digital card camera. The fixed components of this structure are suitable for clamping small digital products such as mobile phones, digital card cameras, MP4, etc., but not suitable for fixing larger ones such as SLR cameras. product.

The bottom of the fixed clamping member 101 is provided with a seventh screw hole 107, and the upper end of the first connecting member 11 is provided with a seventh screw rod 108. The seventh screw rod 108 is screwed in the seventh screw hole 107 to form a fixed assembly. The first connecting member The lower end surface of 11 is provided with a threaded connection hole matched with the first threaded rod 2050, and the fixing assembly 1 is fixed on the upper end of the connection shaft of the universal joint assembly 2 through the first threaded rod and the threaded connection hole.

Referring to Fig. 17, Fig. 24 and Fig. 25, the counterweight assembly also includes a counterweight 4, which is formed by connecting several counterweight sub-blocks 42, and the upper side of each counterweight sub-block 42 is provided with a first Six screw holes 40, the lower side is provided with a sixth screw rod 41, the sixth screw rod is screwed into the sixth screw hole 40 to form a larger counterweight 4, the user can assemble the number of weight sub-blocks 42 according to needs, change The weight of counterweight block 4, to reach the stable requirement of shooting.

Among the components of the present invention, except for the thread connecting the casing and the third hinge 209, the eighth internal thread and the eighth external thread 323 matching it, the movable clamping part 102 and the nut 106

In addition, the specifications of all other concave threads are consistent, and the specifications of all convex threads are also consistent, so that the threaded connection between any parts is convenient.

As shown in Figure 26, in consideration of assembly when carrying, the bracket of the present invention takes the threaded joint as the split point and splits it into the following parts:

The first part B: consists of a clip assembly 10 for holding a mobile phone or a digital card camera and a first connecting piece 11 connecting the clip assembly 10 and the universal joint assembly 2 .

The second part C: consists of a pan/tilt 10' for connecting a digital camera or a video camera and a pan/tilt connector 11' for connecting the pan/tilt 10' and the universal joint assembly 2, the fixed assembly of this structure is different from the ordinary The connecting piece used on the tripod is the same as that of the cloud platform, which is suitable for fixing digital products such as digital card cameras, SLR cameras and video cameras with standard threaded interfaces. It is suitable for fixing mobile phones. Part A and part B are two forms of fixed structure. They complement each other in function. Users can choose according to the type of product fixed, which can meet the needs of all camera and photography products in the market.

The third part D: mainly composed of the universal joint assembly 2 and the first leg tube in the counterweight assembly 3 .

In the fourth part E, the handle assembly 22 in the universal joint assembly 2 is removed to form a separate part.

Fifth part F: a whole formed by connecting the second leg tube 31 and the supporting component 32 .

Part VI G: Counterweight 4.

There are many combinations of components of the bracket of the present invention, which can meet the requirements of various shooting functions such as hand-held shooting, self-timer, fixed shooting, etc. Several commonly used combination methods are given below.

(1) The first function is handheld shooting, and there are three combinations of this function:

(1) The first combination method is shown in Figure 16. It is composed of the first part B, the third part D, the fourth part E, and the fifth part F. The support component 32 is hidden in the second leg tube 31, suitable for In support of mobile phones, card-type digital cameras and light-weight photographic video products. If the third part D and the fifth part F are coaxial, the vertical segment formed by the third part D and the fifth part F will vibrate during the shooting process, which will affect the shooting effect. After the fifth part F is bent along the first hinge axis 301 and the second hinge axis, a zigzag structure is formed for handheld shooting, which can reduce swing and improve the quality of shooting.

(2) The second combination method is shown in Figure 17, consisting of the second part C, the third part D, the fourth part E, the fifth part F, and the sixth part G, and the supporting component 32 is hidden in the second foot The inside of the tube 31 is suitable for supporting SLR cameras and video cameras with relatively heavy weights.

(3) The third combination method is shown in Figure 21. It is a short and small shooting bracket composed of the first part B or the second part C and the fourth part E. The bracket does not have anti-shake function and is suitable for general mobile phones Or digital card camera shooting.

(2) The second function is fixed shooting, and there are two combinations of this function:

(1) As shown in Figure 18 and Figure 19, the first combination mode is composed of the second part C, the third part D, the fourth part E, the fifth part F, and the sixth part G, and the support assembly 32 is formed from the second part Take out the second leg tube 31, reversely screw it on the lower end of the second leg tube 31, and three supporting legs 321 form a supporting structure. In Fig. 19, the leg tube of the first leg tube assembly 30 is elongated to form a higher height , in Fig. 18, the leg tube of the first leg tube assembly 30 is elongated and balanced, and is suitable for supporting high-angle shooting of photographic and video products such as single-lens reflex cameras and video cameras. Lighter photography and camera products, it is enough to replace the second part C with the first part B on the basis of the above, as shown in Fig. 12 .

(2) The second combination method is shown in Figure 23. It is composed of the second part C, the fifth part F, and the sixth part G. The support assembly 32 is taken out from the second leg tube 31 and reversely screwed to the second part. The lower end of the two-legged tube 31, three support feet 321 form a support structure, the height of this support is lower than the above-mentioned first combination method, and is suitable for supporting SLR cameras, cameras, etc. For shooting, if it is necessary to support mobile phones, card-type digital cameras and photographic video products with relatively small weight, it is enough to replace the second part C with the first part B on the basis of the above.

(3) Low shooting function. The combination of this structure is shown in Figure 22. It is composed of the second part C and the support component 32. This combination has the lowest height and is suitable for supporting SLR cameras and video cameras. For low-angle shooting of photographic and video products, if it is necessary to support photographic and video products such as mobile phones and digital card cameras with relatively small weight, replace the second part C with the first part B.

(4) Self-timer function, the combination of this structure is shown in Figure 20, which is composed of the first part B and the third part D. After the first leg tube assembly 30 is stretched, it can reach a longer length and is light in weight. It is suitable for self-portraits that support mobile phones, card-type digital cameras and other photographic and video products with relatively small weight.

Of course, the above only provided several commonly used combinations, and the components of the present invention also have other combinations. As long as they are equal modifications and changes made according to the scope of protection of the present invention, they all belong to the scope of protection of the present invention. .

Claims (10)

1. A camera photography balance bracket is characterized in that it comprises a universal joint assembly, and the universal joint assembly comprises a universal bushing, and the universal bushing is provided with an arc-shaped cavity, and in the cavity A universal ball valve is installed, the axis of the universal ball valve is provided with a connecting shaft, the universal shaft sleeve is connected with a handle assembly, and the upper end of the connecting shaft is connected with a fixing assembly for fixing a digital camera or a mobile phone. The lower end of the connecting shaft is connected with a counterweight assembly. 2 . The bracket according to claim 1 , wherein the arc-shaped cavity is formed by a cylindrical hole and two snap rings respectively fixed at the upper and lower ends of the cylindrical hole. 3. The bracket according to claim 1, wherein the counterweight assembly comprises a first leg assembly and a second leg, the upper end of the first leg assembly is hinged to the lower end of the connecting shaft, the The lower end of the first leg assembly is hinged to the upper end of the second leg. 4. The bracket according to claim 3, characterized in that the first leg tube assembly is a telescopic structure composed of several nested sleeves, the sleeves are eccentric tubes, wherein, except for the innermost Outside the casing, locking sleeves are plugged into the nozzles at the upper ends of the other casings, and anti-drilling sleeves are plugged into the nozzles at the lower ends of the other casings except for the outermost casing. 5. The bracket according to claim 4, wherein the connecting shaft is composed of an upper connecting shaft and a lower connecting shaft, the outer wall of the upper end of the upper connecting shaft is provided with threads to form a first threaded rod, and the lower end is provided with a concave The screw hole of the second screw hole forms a second screw hole, and the second screw hole matches the thread of the first threaded rod, and the upper and lower ends of the lower connecting shaft are provided with a second screw thread that matches the thread of the second screw hole , so that the upper and lower ends of the lower connecting shaft respectively form a second threaded rod and a third threaded rod, the third threaded rod is threadedly connected with a first hinge, and the first hinge is hinged with a second hinge through the first hinge shaft. The end of the second hinge is provided with a fourth threaded hole that is threadedly matched with the first threaded rod, and the upper end of the innermost sleeve is provided with a fourth threaded thread that is threadedly matched with the fourth threaded hole pole. 6. The bracket according to claim 4, wherein the lower end of the outermost sleeve is threaded with a third hinge, and the third hinge is hinged with a fourth hinge through a second hinge shaft, and the third hinge is hinged with a fourth hinge. The lower end of the fourth hinge is provided with a fifth threaded hole matched with the first threaded rod, and the upper end of the second leg tube is provided with a fifth threaded rod matched with the fifth threaded hole. 7. The bracket according to claim 4, characterized in that both the locking sleeve and the anti-drilling sleeve are ring-shaped with openings, the outer wall of the locking sleeve is provided with a positioning step, and the upper end of the sleeve is provided with a Positioning hole, after the locking sleeve is installed in the upper end of the casing, the positioning step is stuck in the positioning hole; the outer wall of the anti-drilling sleeve is provided with a limit step, and the lower end of the casing is provided There is a limiting hole, and after the anti-drilling sleeve is installed in the lower end of the casing, the limiting step is stuck in the limiting hole. 8. The bracket according to claim 4, characterized in that a support assembly is connected to the lower end of the second leg tube, and the support assembly is supported by a support member and three supports hinged at 120 degrees to each other on the support member. The three supporting legs are folded and inserted into the second leg tube. The inner wall of the lower end of the second leg tube is provided with an eighth internal thread, and the outer walls of both ends of the support member are provided with the eighth internal thread. The eighth internal thread matches the eighth external thread, and the upper and lower ends of the support are provided with ninth threaded rods. 9. The bracket according to claim 8, wherein the counterweight assembly further comprises a counterweight block, the counterweight block is formed by connecting several counterweight blocks, and the upper side of the counterweight block is provided with The sixth screw hole matches the thread of the ninth threaded rod, and the lower side is provided with a sixth screw rod with the same thread as the ninth threaded rod. 10. The bracket according to claim 1, wherein the fixed assembly is a clip assembly, the clip assembly includes a fixed clamp and a movable clamp, the fixed clamp is provided with an insertion hole, the The inner wall of the insertion hole is stepped, and a spring is installed in the insertion hole, and the two ends of the movable clamp pass through the axis of the spring, and the end is threaded with a nut, and one end of the spring is against the spring. the step surface of the inner wall of the insertion hole, and the other end is against the end surface of the nut.

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