Photographic equipment lifting frame

Abstract

The utility model relates to a photographic equipment lifting frame which comprises an equipment mounting structure, a hydraulic lifting mechanism and a base which are connected in sequence, the hydraulic lifting mechanism comprises a first support, a second support and a first locking assembly, the first support is rotationally connected to the second support, and the first locking assembly is arranged at a switching position. The first locking assembly comprises a first hydraulic cavity and a first piston, the first hydraulic cavity is fixed to one of the first support and the second support, the other one of the first support and the second support is rotationally connected with the first piston and drives the first piston to move in the first hydraulic cavity, and the first hydraulic cavity is divided into two first sub hydraulic cavities by the first piston; the two first sub hydraulic cavities are provided with first liquid flow openings and are connected through a first flow guide channel to form a loop, and a switch piece is arranged on the first flow guide channel and used for blocking or opening the loop. According to the photographic equipment lifting frame, the first piston is pushed to move when the first support rotates, and better bearing capacity is provided through hydraulic pressure.

Description

Technical Field

[0001] The present application relates to the technical field of photographic equipment lifting frames, and in particular to a photographic equipment lifting frame. Background Art

[0002] Existing tripods for photographic equipment, such as those used daily, are usually controlled by friction damping at the joints. The up and down lifting with damping does not feel smooth and has a poor hand feel, and the load-bearing capacity is also poor. For some other tripods for photographic equipment, external hydraulic rods are used for control, which results in a larger overall size and a more complex structure of the tripod, which can only be limited to special purposes and cannot be widely used. Utility Model Content

[0003] The present application provides a photographic equipment lifting frame to solve the problem that the hydraulic structure of the photographic equipment lifting frame is relatively complex and has a large volume.

[0004] The photographic equipment lifting stand according to the present application includes an equipment mounting structure and a hydraulic lifting mechanism connected in sequence, the hydraulic lifting mechanism includes a first bracket, a second bracket and a first locking assembly, the first bracket is rotatably connected to the second bracket, the first locking assembly is arranged at the transition point, the first locking assembly includes a first hydraulic chamber and a first piston, one of the first bracket and the second bracket is fixed with the first hydraulic chamber, the other is rotatably connected to the first piston and drives the first piston to move in the first hydraulic chamber, the first piston divides the first hydraulic chamber into two first sub-hydraulic chambers, the two first sub-hydraulic chambers are both provided with a first liquid flow port and are connected through a first guide channel to form a loop, the first guide channel is provided with a switch component, and the switch component is used to block or conduct the first guide channel.

[0005] According to the photographic equipment lifting stand of the present application, a screw portion is provided on the first piston, a threaded hole is provided on the first bracket, and the screw portion is meshed with the threaded hole.

[0006] According to the photographic equipment lifting stand of the present application, the end of the first bracket and the end of the second bracket are rotatably connected.

[0007] Optionally, a stopper is provided in the switch member, and the stopper can be moved to a position that completely closes the first flow guiding channel or at least partially avoids the first flow guiding channel.

[0008] Optionally, the switch component defines an avoidance chamber, a connecting chamber, a first connecting port and a second connecting port, the first connecting port and the second connecting port are both arranged on the side wall of the connecting chamber, the avoidance chamber is connected with the connecting chamber, the first guide channel includes a first sub-channel and a second sub-channel, the two ends of the first sub-channel are respectively connected with the first connecting port and one of the first liquid flow ports, the second sub-channel is respectively connected with the second connecting port and another of the first liquid flow ports, an elastic component is provided in the switch component, the two ends of the elastic component are respectively stopped by the stopper and the switch component, and the elastic component ensures that the stopper is always in the connecting chamber.

[0009] Optionally, a control valve is provided on the first flow guiding channel, and the control valve is used to control the opening of the first flow guiding channel.

[0010] Optionally, the second bracket includes two supporting parts and a crossbeam part connecting the two supporting parts, and the first hydraulic chamber is arranged in the crossbeam part.

[0011] The photographic equipment lifting stand according to the present application also includes a base, and the hydraulic lifting mechanism also includes a third bracket, and the two ends of the third bracket are rotatably connected to the second bracket and the base respectively, and a second locking assembly is provided at the rotation connection between the third bracket and the second bracket, and the second locking assembly includes a second hydraulic chamber and a second piston, and one of the third bracket and the second bracket is fixed with the second hydraulic chamber, and the other is rotatably connected to the second piston and drives the second piston to move in the second hydraulic chamber, and the second piston divides the second hydraulic chamber into two second sub-hydraulic chambers, and the two second sub-hydraulic chambers are both provided with second liquid flow ports and are connected through a second guide channel to form a loop.

[0012] Optionally, the first flow guiding channel and the second flow guiding channel share a section of pipeline, and the switch element is arranged on the pipeline.

[0013] Optionally, the photographic equipment lifting stand further includes: a fourth bracket, both ends of which are rotatably connected to the third bracket and the base respectively.

[0014] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0015] The photographic equipment lifting stand provided in the embodiment of the present application has a first piston provided in a first hydraulic chamber, one of the first bracket and the second bracket is fixed with the first hydraulic chamber, and the other is rotatably connected to the first piston and drives the first piston to move in the first hydraulic chamber. During the rotation of one of the first bracket and the second bracket, the first piston will be pushed to move, and the pressure in the first hydraulic chamber needs to be overcome during the movement of the first piston, and the liquid is difficult to compress. Therefore, during the rotation of the bracket (the one of the first bracket and the second bracket that is rotatably connected to the first piston), the hydraulic pressure provides better load-bearing capacity and a silky feel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 A side view of a photographic equipment lifting stand provided in an embodiment of the present application;

[0020] Figure 2 A three-dimensional diagram of a photographic equipment lifting stand provided in an embodiment of the present application;

[0021] Figure 3 A cross-sectional view of a photographic equipment lifting stand provided in an embodiment of the present application;

[0022] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0023] Figure 5 A three-dimensional diagram of a switch member of a photographic equipment lifting stand provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram showing a photographic equipment lifting stand of an embodiment of the present application when it is unfolded;

[0025] Figure 7A schematic diagram showing a photographic equipment lifting stand of an embodiment of the present application when folded is shown.

[0026] Description of reference numerals:

[0027] Hydraulic lifting mechanism 10, first bracket 11, first hydraulic chamber 111, first piston 112, screw portion 113, support portion 115, beam portion 116, second bracket 12, first flow guide channel 13, first sub-channel 131, second sub-channel 132, switch member 14, button portion 142, third bracket 15, fourth bracket 16,

[0028] Base 20, universal wheels 201. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0031] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0032] like Figure 1 , Figure 3 as well as Figure 4 As shown, according to the embodiment of the present application, the photographic equipment lifting frame includes an equipment mounting structure and a hydraulic lifting mechanism 10 connected in sequence, the hydraulic lifting mechanism 10 includes a first bracket 11, a second bracket 12 and a first locking assembly, the first locking assembly includes a first hydraulic chamber 111 and a first piston 112, the first hydraulic chamber 111 is provided with a first piston 112, one of the first bracket 11 and the second bracket 12 is fixed with the first hydraulic chamber 111, and the other is rotatably connected to the first piston 112 and drives the first piston 112 to move in the first hydraulic chamber 111, the first piston 112 divides the first hydraulic chamber 111 into two first sub-hydraulic chambers, the two first sub-hydraulic chambers are both provided with a first liquid flow port and are connected through a first guide channel 13 to form a loop, the first guide channel 13 is provided with a switch member 14, the switch member 14 is used to block or conduct the first guide channel 13.

[0033] A first hydraulic chamber 111 is fixed on one of the first bracket 11 and the second bracket 12. The first hydraulic chamber 111 is fixed on the second bracket 12 as an example for explanation:

[0034] In detail, the first bracket 11 is rotatably connected to the first piston 112 and drives the first piston 112 to move in the first hydraulic chamber 111. The first hydraulic chamber 111 is filled with liquid. During the rotation of the first bracket 11, the first piston 112 is pushed to move. During the movement of the first piston 112, the pressure in the first hydraulic chamber 111 needs to be overcome, and the liquid is difficult to compress. Therefore, during the rotation of the first bracket 11, the hydraulic pressure provides better load-bearing capacity and a silky feel.

[0035] When the first piston 112 moves toward a first sub-hydraulic chamber, the liquid in a first sub-hydraulic chamber is squeezed out of the first sub-hydraulic chamber and flows back to the other first sub-hydraulic chamber through the first guide channel 13. When the first piston 112 moves toward another first sub-hydraulic chamber, the liquid in the other first hydraulic chamber is squeezed out of the other first hydraulic chamber and flows back to the first hydraulic chamber through the first guide channel 13. In this way, the liquid is used to provide a pushing resistance and enables the liquid to achieve self-circulation without the need to set up other additional structures. The overall structure of the photographic equipment lifting frame can be simplified, which facilitates further reduction in the volume of the photographic equipment lifting frame.

[0036] When the switch member 14 blocks the circuit, the liquid cannot flow in the first guide channel 13, and the first piston 112 cannot move in the first hydraulic chamber 111 due to the pressure of the liquid. The inability of the first piston 112 to move will cause the first bracket 11 to be unable to rotate, thereby achieving a locking effect; when the switch member 14 conducts the circuit, the liquid can flow in the first guide channel 13, and the first piston 112 can push the liquid to move in the first hydraulic chamber 111, so that the first bracket 11 can rotate, thereby meeting the different usage requirements of the first bracket 11 being stagnate or rotate.

[0037] According to the photographic equipment lifting stand of the embodiment of the present application, liquid is used to provide resistance and feel for the first bracket 11 during rotation. At the same time, the difficult-to-compress characteristic of liquid is used to provide a better load-bearing capacity for the equipment mounting structure, making the photographic equipment more stable after being installed on the photographic equipment lifting stand.

[0038] like Figure 4 As shown, according to the photographic equipment lifting stand of the embodiment of the present application, a screw portion 113 is provided on the first piston 112, and a threaded hole is provided on the second bracket 12, and the screw portion 113 is engaged with the threaded hole.

[0039] In detail, the first piston 112 is provided with a screw portion 113, and the first bracket 11 is provided with a threaded hole, and the screw portion 113 is meshed with the threaded hole, so that when the first bracket 11 is rotated, the meshing between the screw portion 113 and the threaded hole causes the screw portion 113 to move, thereby driving the first piston 112 to move in the first hydraulic chamber 111. Providing a threaded connection between the first piston 112 and the first bracket 11 can simplify the structural setting and improve the assembly accuracy.

[0040] In a specific embodiment, the first piston 112 includes a plug body portion and a screw rod portion 113 , wherein the plug body portion is located in the first hydraulic chamber 111 , and the screw rod portion 113 is located outside the first hydraulic chamber 111 .

[0041] The cross-sectional shape of the first hydraulic chamber 111 includes, but is not limited to, a circle, an ellipse, and a rectangle. In the embodiment of the present application, the cross-sectional shape of the first hydraulic chamber 111 is configured as a circle.

[0042] In some embodiments, the end of the first bracket 11 is rotatably connected to the end of the second bracket 12. In this way, the photographic equipment lifting frame can have a larger adjustment range and a larger lifting range for the photographic equipment.

[0043] like Figure 4 As shown, according to the photographic equipment lifting frame of the embodiment of the present application, the two first liquid flow ports are respectively located at the front end and the rear end of the moving direction of the first piston 112, and the first guide channel 13 is also defined on the first bracket 11. In this way, the front and rear sides of the first piston 112 are divided into two first sub-hydraulic chambers. When the first piston 112 moves forward, the liquid in the front first sub-hydraulic chamber is squeezed out of one first sub-hydraulic chamber and flows back to the other first sub-hydraulic chamber through the first guide channel 13. When the first piston 112 moves backward, the liquid in the rear first hydraulic chamber is squeezed out of the other first hydraulic chamber and flows back to the first hydraulic chamber through the first guide channel 13. In this way, the liquid is used to provide the resistance to push and enable the liquid to achieve self-circulation, without the need to set up other additional structures, which can simplify the overall structure of the photographic equipment lifting frame and facilitate further reduction in the volume of the photographic equipment lifting frame.

[0044] like Figure 1 and Figure 5 As shown, in some embodiments, a stopper is provided in the first guide channel 13 , and the stopper can be moved to a position that completely closes the first guide channel 13 or at least partially avoids the first guide channel 13 .

[0045] In detail, a stopper is provided in the switch member 14, and the stopper can be moved to a position that completely closes the first guide channel 13 or a position that at least partially avoids the first guide channel 13. That is to say, the stopper is movable, and the stopper can stay in at least two positions. One position is that the stopper stays in a position that completely closes the first guide channel 13. At this time, the liquid cannot flow in the first guide channel 13, and the first piston 112 cannot move in the first hydraulic chamber 111 due to the pressure of the liquid. The inability of the first piston 112 to move will cause the first bracket 11 to be unable to rotate, thereby achieving a locking effect; the other position is that the stopper stays in a position that at least partially avoids the first guide channel 13. At this time, the liquid can flow in the first guide channel 13, and the first piston 112 can also move in the first hydraulic chamber 111 to push the liquid, so that the first bracket 11 can rotate, thereby meeting the different usage requirements of the first bracket 11 stagnation and rotation.

[0046] like Figure 4 and Figure 5 As shown, in some embodiments, the switch member 14 defines an avoidance chamber, a connecting chamber, a first connecting port and a second connecting port. The first connecting port and the second connecting port are both arranged on the side wall of the connecting chamber. The avoidance chamber is connected with the connecting chamber. The first guide channel 13 includes a first sub-channel 131 and a second sub-channel 132. The two ends of the first sub-channel 131 are respectively connected with the first connecting port and a first liquid flow port, and the second sub-channel 132 is respectively connected with the second connecting port and another first liquid flow port. An elastic member is provided in the switch member 14. The two ends of the elastic member are respectively stopped by the stop member and the switch member 14. The elastic member ensures that the stop member is always in the connecting chamber.

[0047] In detail, the elastic member makes the stop member always in the connecting cavity, so the first bracket 11 and the second bracket 12 always remain in a locked state. When the first bracket 11 needs to be rotated, the stop member is pressed to move the stop member from the connecting cavity to the avoidance cavity. In this way, when the first piston 112 moves toward a first liquid flow port, the liquid flows out of the first hydraulic chamber 111 through the first liquid flow port in sequence and then flows into the first hydraulic chamber 111 through the second sub-channel 132, the second connecting port, the connecting cavity, the first connecting port, the first sub-channel 131 and another first liquid flow port; when the first piston 112 moves toward another first liquid flow port, the liquid flows out of the first hydraulic chamber 111 through another first liquid flow port in sequence and flows into the first hydraulic chamber 111 through the first sub-channel 131, the first connecting port, the connecting cavity, the second connecting port, the second sub-channel 132 and then through a first liquid flow port.

[0048] When the stopper is released, it moves from the avoidance cavity to the connecting cavity, and the first connecting port and the second connecting port are blocked, so that the liquid cannot flow through, and the liquid is difficult to be compressed, providing resistance for the first piston 112, thereby bearing the weight of the photographic equipment installed on the equipment mounting structure.

[0049] like Figure 1 and Figure 5 As shown, in a specific embodiment, a button portion 142 is provided on the stopper, so that the user can press the button portion 142 to operate.

[0050] In some embodiments, a control valve is provided on the first flow guiding channel 13, and the control valve is used to control the opening of the first flow guiding channel 13. It can be understood that by controlling the opening of the first flow guiding channel 13 with the control valve, the flow rate of the liquid in the connecting cavity can be controlled, so that the damping feel when the second bracket 12 and the first bracket 11 rotate relative to each other can be adjusted, so that the user experience is further improved.

[0051] like Figure 2-Figure 4As shown, in some embodiments, the first bracket 11 includes two support portions 115 and a cross beam portion 116 connecting the two support portions 115 , and the first hydraulic chamber 111 is disposed in the cross beam portion 116 .

[0052] In detail, the first bracket 11 includes two support portions 115 and a cross beam portion 116 connecting the two support portions 115 , and the first hydraulic chamber 111 is disposed in the cross beam portion 116 , thereby providing a suitable feel for the relative rotation between the first bracket 11 and the second bracket 12 .

[0053] Part of the first guide channel 13 is disposed in the supporting portion of the first bracket 11 , so that the flow path of the liquid can be extended.

[0054] According to the photographic equipment lifting stand of the embodiment of the present application, a sealing member is provided on the first piston 112 , and the sealing member abuts against the inner wall surface of the first hydraulic chamber 111 .

[0055] In detail, a sealing member is disposed on the first piston 112 , and the sealing member abuts against the inner wall surface of the first hydraulic chamber 111 , so that the sealing performance between the sealing member and the first hydraulic chamber 111 can be enhanced.

[0056] like Figure 1 , Figure 6 and Figure 7 As shown, according to the embodiment of the present application, the photographic equipment lifting stand also includes a base 20, and the hydraulic lifting mechanism also includes a third bracket 15. The two ends of the third bracket 15 are rotatably connected to the second bracket 12 and the base 20 respectively. A second locking assembly is provided at the rotation connection between the third bracket 15 and the second bracket 12. The second locking assembly includes a second hydraulic chamber and a second piston. One of the third bracket 15 and the second bracket 12 is fixed with a second hydraulic chamber, and the other is rotatably connected to the second piston and drives the second piston to move in the second hydraulic chamber. The second piston divides the second hydraulic chamber into two second sub-hydraulic chambers. The two second sub-hydraulic chambers are both provided with second liquid flow ports and are connected through a second guide channel to form a loop.

[0057] The second hydraulic chamber is fixed to one of the third bracket 15 and the second bracket 12, and the second hydraulic chamber is fixed to the second bracket 12 as an example for explanation:

[0058] In detail, the third bracket 15 is rotatably connected to the second piston and drives the second piston to move in the second hydraulic chamber. During the rotation of the third bracket 15, the second piston will be pushed to move. During the movement of the second piston, the pressure in the second hydraulic chamber needs to be overcome, and the liquid is difficult to compress. Therefore, during the rotation of the third bracket 15, the hydraulic pressure is used to provide better load-bearing capacity and a silky feel.

[0059] When the second piston moves toward a second sub-hydraulic chamber, the liquid in a second sub-hydraulic chamber is squeezed out of the second sub-hydraulic chamber and flows back to another second sub-hydraulic chamber through the second guide channel. When the second piston moves toward another second sub-hydraulic chamber, the liquid in another second hydraulic chamber is squeezed out of the other second hydraulic chamber and flows back to a second hydraulic chamber through the second guide channel. In this way, the liquid is used to provide a pushing resistance and enable the liquid to achieve self-circulation, thereby adjusting the height of the second bracket 12 relative to the base 10.

[0060] It should be noted that the structures and principles of the first locking assembly and the second locking assembly are the same. The accompanying drawings only show the structure of the first locking assembly, and the structure and principle of the second locking assembly refer to the first locking assembly.

[0061] in, Figure 6 A schematic diagram showing the unfolding of the photographic equipment lifting frame is shown. Figure 7 A schematic diagram showing a photographic equipment lifting stand when folded is shown.

[0062] The first flow guiding channel 13 and the second flow guiding channel share a section of pipeline, and the switch element 14 is arranged on the pipeline, so that the switch element 14 is used to synchronously control the conduction or blocking of the first flow guiding channel 13 and the second flow guiding channel.

[0063] like Figure 1 , Figure 6 and Figure 7 As shown, in some embodiments, a fourth bracket 16 is further included, and two ends of the fourth bracket 16 are rotatably connected to the third bracket 15 and the base 20 respectively.

[0064] It can be understood that when the photographic equipment lifting frame is not needed, the third bracket 15 and the fourth bracket 16 can be rotated and folded, and when the photographic equipment lifting frame is needed, the third bracket 15 and the fourth bracket 16 are opened, and the fourth bracket 16 can support the third bracket 15, so that the third bracket 15, the fourth bracket 16 and the base 20 form a stable triangular support structure, thereby improving the stability and reliability of the photographic equipment lifting frame in supporting the photographic equipment.

[0065] like Figure 1 As shown, according to the photographic equipment lifting stand of the embodiment of the present application, at least three universal wheels 201 are provided at the bottom of the base 20.

[0066] It can be understood that by providing the universal wheel 201, the photographic equipment lifting frame can be pushed to move to any position, especially when the photographic equipment installed on the equipment mounting structure is large and heavy, which can simplify the user's operation and improve the convenience of use.

[0067] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0068] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0069] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A photography equipment lifting stand, characterized in that: It includes an equipment installation structure and a hydraulic lifting mechanism connected in sequence, the hydraulic lifting mechanism includes a first bracket, a second bracket and a first locking assembly, the first bracket is rotatably connected to the second bracket, the first locking assembly is arranged at the transition, the first locking assembly includes a first hydraulic chamber and a first piston, one of the first bracket and the second bracket is fixed with the first hydraulic chamber, the other is rotatably connected to the first piston and drives the first piston to move in the first hydraulic chamber, the first piston divides the first hydraulic chamber into two first sub-hydraulic chambers, the two first sub-hydraulic chambers are both provided with a first liquid flow port and are connected through a first guide channel to form a loop, the first guide channel is provided with a switch component, and the switch component is used to block or conduct the first guide channel.

2. The photographic equipment lifting stand according to claim 1, characterized in that: The first piston is provided with a screw portion, the first bracket is provided with a threaded hole, and the screw portion is meshed with the threaded hole.

3. The photographic equipment lifting stand according to claim 1, characterized in that: The end of the first bracket and the end of the second bracket are rotatably connected.

4. The photographic equipment lifting stand according to claim 1, characterized in that: A stopper is disposed inside the switch member, and the stopper can be moved to a position where the first flow guiding channel is completely closed or where the first flow guiding channel is at least partially avoided.

5. The photographic equipment lifting stand according to claim 4, characterized in that: The switch component defines an avoidance chamber, a connecting chamber, a first connecting port and a second connecting port, the first connecting port and the second connecting port are both arranged on the side wall of the connecting chamber, the avoidance chamber is connected with the connecting chamber, the first guide channel includes a first sub-channel and a second sub-channel, the two ends of the first sub-channel are respectively connected with the first connecting port and one of the first liquid flow ports, the second sub-channel is respectively connected with the second connecting port and another of the first liquid flow ports, an elastic component is arranged in the switch component, the two ends of the elastic component are respectively stopped by the stopper and the switch component, the elastic component makes the stopper always in the connecting chamber.

6. The photographic equipment lifting stand according to claim 3, characterized in that: The first flow guiding channel is provided with a control valve, and the control valve is used to control the opening degree of the first flow guiding channel.

7. The photographic equipment lifting stand according to claim 3, characterized in that: The second bracket includes two supporting parts and a cross beam connecting the two supporting parts, and the first hydraulic chamber is disposed in the cross beam.

8. The photographic equipment lifting stand according to any one of claims 1 to 7, characterized in that: It also includes a base, and the hydraulic lifting mechanism also includes a third bracket, both ends of the third bracket are rotatably connected to the second bracket and the base respectively, a second locking assembly is provided at the rotation connection between the third bracket and the second bracket, the second locking assembly includes a second hydraulic chamber and a second piston, one of the third bracket and the second bracket is fixed with the second hydraulic chamber, and the other is rotatably connected to the second piston and drives the second piston to move in the second hydraulic chamber, the second piston divides the second hydraulic chamber into two second sub-hydraulic chambers, and the two second sub-hydraulic chambers are both provided with second liquid flow ports and are connected through a second guide channel to form a loop.

9. The photographic equipment lifting stand according to claim 8, characterized in that: The first flow guiding channel and the second flow guiding channel share a section of pipeline, and the switch element is arranged on the pipeline.

10. The photographic equipment lifting stand according to claim 8, characterized in that: Also includes: A fourth bracket, two ends of which are rotatably connected to the third bracket and the base respectively.

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