Control handle of a photographic support and photographic support

Abstract

The application discloses a control handle of a photographic support frame and the photographic support frame, wherein the control handle comprises a handle shell and a driving assembly arranged in the handle shell, and the driving assembly comprises a driving oil cylinder, the driving oil cylinder comprises a first cylinder body, a first oil storage cavity is arranged in the first cylinder body, and the first cylinder body is provided with a first through hole for connecting a fluid communication pipeline; a compensation oil cylinder comprises a second cylinder body and a first piston, a second oil storage cavity is arranged in the second cylinder body, the first piston is slidingly arranged in the second oil storage cavity, the second cylinder body is provided with a second through hole connected with the second oil storage cavity, and the second through hole is connected with the first through hole through the fluid communication pipeline. By adopting the sealing structure of the rigid second cylinder body matched with the sliding first piston, the damage risk of the oil storage bag due to material fatigue and corrosion after long-term use is avoided, the structural reliability of the compensation oil cylinder is improved, the long-term stable and effective oil storage function is ensured, and the service life of the control handle is prolonged.

Description

Technical Field

[0001] This application relates to the field of photographic auxiliary equipment, and in particular to a control handle and a photographic support frame. Background Technology

[0002] To improve video recording quality, mobile phones, tablets, or cameras typically require a camera stand when recording video or taking photos. This stands allow for adjusting the height of the equipment and enhancing its stability during use. The handle of the camera stand is a key operating component, enabling quick adjustment of its opening and closing position.

[0003] The handle of the photographic support bracket in the related technology is hydraulically driven. The handle contains a cylinder, piston assembly, return spring, and hydraulic oil storage component. The hydraulic oil storage component is usually an oil reservoir, often made of rubber. However, this material is prone to aging and corrosion from prolonged contact with hydraulic oil. Combined with the constant vibration and shaking during the operation of the main hydraulic cylinder, this accelerates the damage to the oil reservoir, causing hydraulic oil leakage. Ultimately, this leads to the failure of the main hydraulic cylinder's oil storage function, rendering the handle unusable. Utility Model Content

[0004] The main objective of this application is to provide a control handle for a camera support frame and a camera support frame in order to improve the stability of the oil storage component within the hydraulic drive assembly of the handle.

[0005] To achieve the above objectives, this application provides a control handle for a camera support frame, including a handle housing and a drive assembly disposed within the handle housing, the drive assembly comprising: A driving cylinder, the driving cylinder including a first cylinder body, the first cylinder body having a first oil reservoir for storing hydraulic fluid, and the first cylinder body having a first through hole for connecting to a fluid communication pipeline. The compensation cylinder includes a second cylinder body and a first piston. The second cylinder body has a second oil reservoir for storing hydraulic fluid. The first piston is slidably disposed in the second oil reservoir. The second cylinder body has a second through hole that communicates with the second oil reservoir. The second through hole is connected to the first through hole through the fluid communication pipeline.

[0006] In some embodiments, the drive cylinder and the compensation cylinder are arranged sequentially along the axial direction of the handle housing.

[0007] In some embodiments, the drive cylinder further includes a second piston, which is slidably disposed within the first oil storage chamber.

[0008] In some embodiments, the second piston includes: The second piston disc slides in conjunction with the wall of the first oil reservoir. The second piston rod extends from one end face of the second piston disc.

[0009] In some embodiments, the control handle further includes: A wrench is provided on the periphery of the handle housing, and one end of the wrench is hinged to the handle housing; A linkage component is located inside the handle housing at one end near the drive cylinder, and one end of the linkage component is rotatably connected to the wrench. The wrench can be rotated to drive the other end of the linkage component to act on the end of the second piston rod away from the second piston disc, thereby driving the second piston to move.

[0010] In some embodiments, a boss is connected to one end of the second piston rod near the linkage member, and the end of the linkage member near the second piston rod can abut against and act on the bottom surface of the flange of the boss.

[0011] In some embodiments, the linkage member is provided with two arms near the boss, and the two arms respectively abut against the bottom surfaces of the opposite side flanges of the boss.

[0012] In some embodiments, the drive cylinder further includes: The first reset component is sleeved with the second piston rod. One end of the first reset component is fixedly connected to the end face of the second piston disc, and the other end of the first reset component is fixedly connected to the cavity wall of the first oil storage chamber.

[0013] In some embodiments, the drive cylinder further includes: The third piston includes a third piston disc and a third piston rod extending from one end face of the third piston disc. The second piston disc has a third oil storage chamber inside, and the third piston disc slides in conjunction with the wall of the third oil storage chamber. The second reset member is sleeved with the third piston rod. One end of the second reset member is fixedly connected to the cavity wall of the third oil storage chamber, and the other end of the second reset member is fixedly connected to the end face of the third piston disc.

[0014] Another aspect of this application proposes a photographic support frame, comprising: Support base, used for mounting photographic equipment; At least three support foot assemblies are connected to the support base, and each of the support foot assemblies is provided with a support foot locking assembly; The control handle of the photographic support frame described above is disposed on the support base, and the control handle is used to unlock or lock the support foot locking assembly.

[0015] The control handle of the photographic support frame in this application has a drive assembly inside its handle housing. The drive assembly includes a drive cylinder and a compensation cylinder. When the volume of hydraulic fluid in the first oil reservoir changes due to thermal expansion and contraction of the drive cylinder, the second oil reservoir of the compensation cylinder is connected to the first oil reservoir through a fluid communication pipe. The first piston slides in the second cylinder body according to the volume change of the hydraulic fluid, squeezing or drawing back hydraulic oil from the second through hole. The hydraulic oil is transported to the first through hole through the fluid communication pipe to replenish or draw back the drive cylinder. The linear sliding form of the first piston can more accurately respond to the hydraulic changes in the drive cylinder, realize the pressure stability of the hydraulic system, and ensure the driving accuracy of the control handle on the support frame. In addition, this application adopts a sealing structure of rigid second cylinder body and sliding first piston, replacing the thin-walled material of traditional oil reservoir bag. This avoids the risk of damage and leakage of oil reservoir bag due to material fatigue and corrosion after long-term use, improves the structural reliability and durability of the compensation cylinder, ensures the long-term stable and effective oil storage function, and thus extends the service life of the control handle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a photographic support frame in one embodiment of this application; Figure 2 This is an exploded view of the control handle in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of the control handle in one embodiment of this application; Figure 4 for Figure 3 Schematic diagram of AA section in the middle; Figure 5 This is a schematic diagram of the structure of the control handle in one embodiment of this application. Detailed Implementation

[0017] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0020] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0021] This application discloses a control handle 100 for a camera support frame. Please refer to [reference needed]. Figures 2 to 4 In one embodiment, the control handle 100 includes a handle housing 110 and a drive assembly 130 disposed within the handle housing 110. The drive assembly 130 includes: The driving cylinder 131 includes a first cylinder body 1311, which has a first oil reservoir 131A for storing hydraulic fluid and a first through hole (not shown) for connecting to a fluid communication pipe 138. The compensation cylinder 132 includes a second cylinder body 1321 and a first piston 1322. The second cylinder body 1321 has a second oil reservoir 132A for storing hydraulic fluid. The first piston 1322 is slidably disposed in the second oil reservoir 132A. The second cylinder body 1321 has a second through hole 1363 that communicates with the second oil reservoir 132A. The second through hole 1363 is connected to the first through hole through a fluid communication pipe 138.

[0022] In this embodiment, the hydraulic fluid can be hydraulic oil, which has the characteristic of thermal expansion and contraction. When using the photography support, the user may encounter high or low temperature weather conditions, and the volume of hydraulic oil in the hydraulic system of the control handle 100 is easily affected by temperature changes.

[0023] Therefore, in order to accommodate such changes, in one embodiment, please refer to Figure 2 and Figure 3The drive assembly 130 includes a drive cylinder 131 and a compensation cylinder 132. The main function of the drive cylinder 131 is to cooperate with the actuator cylinder in the support leg assembly to control the support leg assembly. The main function of the compensation cylinder 132 is to actively replenish or withdraw hydraulic oil to the drive cylinder 131 in a timely manner when the hydraulic oil in the drive cylinder 131 changes volume due to thermal expansion and contraction, thereby maintaining the hydraulic stability of the drive cylinder 131.

[0024] In the embodiments of this application, please refer to Figure 4 The compensating cylinder 132 includes a second cylinder body 1321 and a first piston 1322. The second cylinder body 1321 is provided with a second oil reservoir 132A for storing hydraulic oil. When the hydraulic oil flow rate in the second oil reservoir 132A changes, it can push the first piston 1322 to slide linearly within the second oil reservoir 132A. This linear sliding can respond more accurately to pressure fluctuations in the driving cylinder 131, and the pressure stabilization process is more stable. In addition, the material of the second cylinder body 1321 can be aluminum alloy, stainless steel, etc. These materials have stronger corrosion resistance and no risk of material aging or damage. Therefore, the oil storage function of the compensating cylinder 132 of this application is more stable and effective, thereby maintaining the hydraulic stability of the driving cylinder 131 for a long time, improving the smoothness of operation of the control handle 100, and extending its service life.

[0025] Specifically, in this embodiment, when the temperature of the working environment rises, or when the hydraulic oil heats up due to working friction, the volume of the hydraulic oil will expand, and the pressure in the drive cylinder 131 will also increase. The hydraulic oil can enter the fluid communication pipeline 138 through the first through hole, be transported by the fluid communication pipeline 138, and finally enter the compensation cylinder 132 through the second through hole 1363 to balance the pressure of the drive cylinder 131 and protect the drive cylinder 131 from high pressure damage.

[0026] When the ambient temperature drops, the hydraulic oil cools and shrinks, creating a negative pressure inside the drive cylinder 131. The compensation cylinder 132 then allows the stored hydraulic oil to enter the fluid communication pipe 138 through the second through hole 1363. The fluid communication pipe 138 then delivers the oil, which finally enters the drive cylinder 131 through the first through hole. The replenished hydraulic oil fills the gaps caused by the hydraulic oil shrinkage, preventing air from entering or the drive cylinder 131 from getting stuck due to the negative pressure. This ensures that the drive cylinder 131 is always filled with hydraulic oil, maintaining stable pressure. As a result, the hydraulic system of the control handle 100 can adapt to the ambient temperature, improving the applicability of the control handle 100.

[0027] The control handle 100 of the camera support frame in this application has a drive assembly 130 housed within its handle housing 110. The drive assembly 130 includes a drive cylinder 131 and a compensation cylinder 132. When the volume of hydraulic fluid in the first oil storage chamber 131A changes due to thermal expansion and contraction of the drive cylinder 131, the second oil storage chamber 132A of the compensation cylinder 132 is connected to the first oil storage chamber 131A via a fluid communication pipe 138. The first piston 1322 slides within the second cylinder body 1321 as the volume of hydraulic fluid changes, squeezing or drawing back hydraulic oil from the second through hole 1363. Hydraulic oil is delivered to the first through hole via the fluid communication pipeline 138 to replenish or retract the drive cylinder 131, thereby stabilizing the pressure of the hydraulic system and ensuring the driving accuracy of the control handle 100 on the support frame. In addition, this application adopts a sealing structure of rigid second cylinder 1321 in conjunction with sliding first piston 1322, replacing the thin-walled material of the traditional oil storage bag. This avoids the risk of damage and leakage of the oil storage bag due to material fatigue and corrosion caused by long-term use, improves the structural reliability and durability of the compensation cylinder 132, ensures the long-term stable and effective oil storage function, and thus extends the service life of the control handle 100.

[0028] Please refer to Figure 2 In one embodiment, the drive cylinder 131 and the compensation cylinder 132 are arranged sequentially along the axial direction of the handle housing 110.

[0029] The drive cylinder 131 is located at the front end of the handle housing 110, and the compensation cylinder 132 is located at the other end. This makes full use of the axial length space of the handle housing 110, which is beneficial to the compact and miniaturized design of the handle 100 and facilitates its integration into portable devices such as photography support frames.

[0030] In this application embodiment, there are several options for the configuration of the drive cylinder 131. In a preferred embodiment, please refer to... Figure 4 The drive cylinder 131 also includes a second piston 1312, which is slidably disposed in the first oil storage chamber 131A.

[0031] When the user operates the control handle 100, the second piston 1312 of the drive cylinder 131 slides axially along the first oil storage chamber 131A; the second piston 1312 squeezes fluid, such as hydraulic oil, and the hydraulic oil is delivered to the actuator cylinder of the support leg, driving the actuator cylinder to move; when the second piston 1312 slides in the opposite direction, a negative pressure is generated in the first oil storage chamber 131A, drawing back the hydraulic oil.

[0032] In this application embodiment, the second piston 1312 can be configured in several ways. In a preferred embodiment, please refer to [reference needed]. Figure 4The second piston 1312 includes: a second piston disc 131B, which slides in cooperation with the wall of the first oil storage chamber 131A; and a second piston rod 131C, which protrudes and extends from one end face of the second piston disc 131B.

[0033] Specifically, the second piston disc 131B and the second piston rod 131C can be integrally formed. The second piston rod 131C is located on the central axis of the second piston disc 131B, and extends protrudingly from one end face of the second piston disc 131B. The second piston disc 131B and the second piston rod 131C are in a follower relationship; when either the second piston rod 131C or the second piston disc 131B moves under the action of an external force, it will correspondingly drive the other to move.

[0034] The shape of the second piston rod 131C can be varied. In a preferred embodiment, the second piston rod 131C can be cylindrical.

[0035] In the embodiments of this application, please refer to Figure 2 and Figure 3 The control handle 100 also includes: a wrench 120, disposed on the periphery of the handle housing 110, with one end of the wrench 120 hinged to the handle housing 110; and a linkage member 140, disposed inside the handle housing 110 near the end of the drive cylinder 131, with one end of the linkage member 140 rotatably connected to the wrench 120; wherein, the wrench 120 can be rotated to drive the other end of the linkage member 140 to act on the end of the second piston rod 131C away from the second piston disc 131B, thereby driving the second piston 1312 to move.

[0036] In this application embodiment, there are several options for the rotatable connection between the linkage member 140 and the wrench 120. In a preferred embodiment, the linkage member 140 can be rotatably connected to the wrench 120 via a rotating shaft.

[0037] When the wrench 120 is rotated, the wrench 120 can drive the linkage component 140, which acts on the second piston rod 131C and drives the second piston rod 131C to slide axially along the first oil reservoir 131A, thereby driving the entire second piston 1312 to move.

[0038] In the embodiments of this application, please refer to Figure 3 and Figure 4 The second piston rod 131C is connected to a boss 133 at one end near the linkage member 140. The end of the linkage member 140 near the second piston rod 131C can abut against and act on the bottom surface of the flange of the boss 133. The flange of the boss 133 is positioned away from the second piston 1312, and its axial cross-section is T-shaped.

[0039] In this application embodiment, there are several options for the connection method between the second piston rod 131C and the boss 133. In a preferred embodiment, the second piston rod 131C and the boss 133 are threaded together. The threaded connection not only improves the connection strength between the second piston rod 131C and the boss 133, but also allows for disassembly, facilitating maintenance and replacement.

[0040] When the wrench 120 is in operation, the wrench 120 presses and drives the linkage component 140 to rotate. The end of the linkage component 140 that abuts against the flange of the boss 133 can push the boss 133 to move, thereby driving the second piston rod 131C connected to the boss 133 to move, causing the second piston 1312 to move.

[0041] In this application embodiment, the linkage component 140 can be configured in several ways. In a preferred embodiment, please refer to... Figure 5 The linkage component 140 is provided with two arms 141 near the boss 133, and the two arms 141 respectively abut against the bottom surfaces of the opposite flanges of the boss 133.

[0042] This can be understood as follows: a receiving space is formed between the two support arms 141, and the rod of the boss 133 can be received in the receiving space. The flange is located on the two support arms 141, forming a ring structure in which the two support arms 141 engage with the boss 133, thereby improving the connection stability between the linkage component 140 and the boss 133, ensuring that the boss 133 can be pushed by the linkage component 140, and thus ensuring that the drive cylinder 131 can work normally.

[0043] In the embodiments of this application, please refer to Figure 4 The drive cylinder 131 further includes: a first reset member 134, which is sleeved with the second piston rod 131C. One end of the first reset member 134 is fixedly connected to the end face of the second piston disc 131B, and the other end of the first reset member 134 is fixedly connected to the cavity wall of the first oil storage chamber 131A.

[0044] In this application embodiment, the type of the first reset member 134 can be selected from several options. In a preferred embodiment, the first reset member 134 can be a spring.

[0045] When the wrench 120 is pressed, the linkage component 140 pushes the second piston rod 131C and the second piston disc 131B to slide. The end of the first reset component 134 connected to the second piston disc 131B is compressed toward the other end connected to the wall of the first oil storage chamber 131A, storing elastic potential energy. When the wrench 120 is released, the force of the linkage component 140 on the boss 133 disappears, that is, the force of the boss 133 on the second piston rod 131C and the second piston disc 131B disappears. At this time, the elastic potential energy is released, and the first reset component 134 pushes the second piston disc 131B and the second piston rod 131C to slide back to reset. At the same time, it pulls the boss 133 to move in the opposite direction. The boss 133 presses against the support arm 141 of the linkage component 140, causing the linkage component 140 to rotate, thereby driving the wrench 120 to reset.

[0046] To achieve precise control of the control handle 100, the drive cylinder 131 of the control handle 100 typically needs to be filled with sufficient hydraulic oil. However, during the operation of the drive cylinder 131, excessive hydraulic oil can lead to excessive oil pressure inside the first oil reservoir 131A, which can easily cause damage to internal parts, such as seals (not shown), resulting in oil leaks. In severe cases, it may even cause deformation or cracking of the first cylinder body 1311, posing a high safety risk and rendering the control handle 100 unusable.

[0047] To improve the stability and safety of the hydraulic system of the control handle 100, in some embodiments, please refer to... Figure 4 The drive cylinder 131 also includes: The third piston 135 includes a third piston disk 1351 and a third piston rod 1352 extending from one end face of the third piston disk 1351. The second piston disk 131B has a third oil storage chamber 131D inside. The third piston disk 1351 and the wall of the third oil storage chamber 131D slide together. The third cylinder 136 has a third sliding groove 1361 inside, which is connected to the third oil reservoir 131D. The end face of the third cylinder 136 has a through hole 1362, which is connected to the third sliding groove 1361. The third cylinder 136 is partially embedded in the second piston disc 131B.

[0048] The third piston disc 1351 and the third piston rod 1352 can be integrally formed. The third piston rod 1352 is located on the central axis of the third piston disc 1351, and extends protrudingly from one end face of the third piston disc 1351. The third piston disc 1351 and the third piston rod 1352 are in a follower relationship. When either the third piston rod 1352 or the third piston disc 1351 moves under the action of an external force, it will correspondingly drive the other to move.

[0049] In this embodiment of the application, a guide hole (not shown) is constructed on the second piston rod 131C to connect to the third oil storage chamber 131D.

[0050] In this application embodiment, there are several options for the connection method between the third cylinder 136 and the second piston disc 131B. In a preferred embodiment, the third cylinder 136 and the second piston disc 131B are threaded together. The diameter of the third cylinder 136 is smaller than that of the second piston disc 131B. A portion of the outer wall of the third cylinder 136 has a threaded structure, and the inner wall of the second piston disc 131B has a matching threaded structure, which allows the third cylinder 136 and the second piston disc 131B to be threaded together to achieve the connection.

[0051] When the control handle 100 is in operation, the second piston disc 131B, driven by the second piston rod 131C, squeezes the hydraulic oil in the first oil storage chamber 131A to flow to the actuator cylinder. When the hydraulic oil supplied to the actuator cylinder reaches the maximum working capacity (i.e., the maximum amount of hydraulic oil that the actuator cylinder can receive), as the second piston disc 131B continues to move, it will squeeze the excess hydraulic oil in the first oil storage chamber 131A through the guide hole of the second piston rod 131C into the third oil storage chamber 131D and squeeze the third piston disc 1351 and the third piston rod 1352 to move, thereby achieving pressure relief.

[0052] Please refer to the embodiments in this application. Figure 4 The drive cylinder 131 also includes: a second reset member 137, which is sleeved with the third piston rod 1352. One end of the second reset member 137 is fixedly connected to the cavity wall of the third oil storage chamber 131D, and the other end of the second reset member 137 is fixedly connected to the end face of the third piston disc 1351.

[0053] In this application embodiment, the type of the second reset member 137 can be selected in several ways. In a preferred embodiment, the type of the second reset member 137 can be a spring.

[0054] When the drive cylinder 131 is working, the second piston 1312 moves, causing the third cylinder 136 to move. Hydraulic oil is compressed in the first reservoir 131A, and excess hydraulic oil enters the third reservoir 131D. The third piston disc 1351 and the third piston rod 1352 are pushed, and the end of the second reset member 137 connected to the third piston disc 1351 is compressed towards the end connected to the third cylinder 136, storing elastic potential energy. When the wrench 120 is released, the second piston 1312 resets, and the hydraulic oil stored in the third reservoir 131D flows into the first reservoir 131A. The elastic potential energy of the second reset member 137 is released, and the third piston disc 1351 and the third piston rod 1352 reset. That is, by setting the second reset member 137, the third piston 135 can reset autonomously, supporting subsequent cyclic pressure relief and improving the safety and reliability of the control handle 100.

[0055] This application also proposes a photographic support frame; please refer to [reference needed]. Figure 1 In one embodiment, the photographic support frame includes: Support base 200, used for mounting photographic equipment; At least three support foot assemblies 300 are connected to the support base 200, and each support foot assembly 300 is provided with a support foot locking assembly; The control handle 100 of the photographic support frame described above is located on the support base 200. The control handle 100 is used to unlock or lock the support foot locking assembly.

[0056] In this embodiment of the application, the support base 200 is mainly used to install photographic equipment and provide a fixed support platform for the photographic equipment. The photographic equipment involved can be a camera, camcorder, etc.

[0057] In this embodiment, the support foot assembly 300 is used for a camera support frame. Specifically, the support foot assembly 300 mainly serves as the support foot of the camera support frame to provide support when the camera support frame is placed on a surface such as the ground. The camera support frame may include multiple support foot assemblies 300, for example, at least three, which cooperate with each other to provide support.

[0058] The support foot assembly 300 involved in this application embodiment may have functions such as support height adjustment. The support foot locking assembly can be unlocked or locked by the control handle 100, thereby adjusting the extension and retraction of the support foot.

[0059] It should be noted that the specific structure of the control handle 100 is as described in the above embodiments. Since this photography support frame adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0060] The above are only some or preferred embodiments of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A control handle for a photographic support frame, comprising a handle housing and a drive assembly disposed within the handle housing, characterized in that, The driving component includes: A driving cylinder, the driving cylinder including a first cylinder body, the first cylinder body having a first oil reservoir for storing hydraulic fluid, and the first cylinder body having a first through hole for connecting to a fluid communication pipeline. The compensation cylinder includes a second cylinder body and a first piston. The second cylinder body has a second oil reservoir for storing hydraulic fluid. The first piston is slidably disposed in the second oil reservoir. The second cylinder body has a second through hole that communicates with the second oil reservoir. The second through hole is connected to the first through hole through the fluid communication pipeline.

2. The control handle of the photographic support frame according to claim 1, characterized in that, Along the axial direction of the handle housing, the drive cylinder and the compensation cylinder are arranged in sequence.

3. The control handle of the photographic support frame according to claim 1, characterized in that, The drive cylinder also includes a second piston, which is slidably disposed within the first oil storage chamber.

4. The control handle of the photographic support frame according to claim 3, characterized in that, The second piston includes: The second piston disc slides in conjunction with the wall of the first oil reservoir. The second piston rod extends from one end face of the second piston disc.

5. The control handle of the photographic support frame according to claim 4, characterized in that, The control handle also includes: A wrench is provided on the periphery of the handle housing, and one end of the wrench is hinged to the handle housing; A linkage component is located inside the handle housing at one end near the drive cylinder, and one end of the linkage component is rotatably connected to the wrench. The wrench can be rotated to drive the other end of the linkage component to act on the end of the second piston rod away from the second piston disc, thereby driving the second piston to move.

6. The control handle of the photographic support frame according to claim 5, characterized in that, The second piston rod has a boss at one end near the linkage member, and the linkage member at one end near the second piston rod can abut against and act on the bottom surface of the flange of the boss.

7. The control handle of the photographic support frame according to claim 6, characterized in that, The linkage component has two arms near the boss, and the two arms respectively abut against the bottom surfaces of the opposite two flanges of the boss.

8. The control handle of the photographic support frame according to claim 4, characterized in that, The drive cylinder also includes: The first reset component is sleeved with the second piston rod. One end of the first reset component is fixedly connected to the end face of the second piston disc, and the other end of the first reset component is fixedly connected to the cavity wall of the first oil storage chamber.

9. The control handle of the photographic support frame according to claim 4, characterized in that, The drive cylinder also includes: The third piston includes a third piston disc and a third piston rod extending from one end face of the third piston disc. The second piston disc has a third oil storage chamber inside, and the third piston disc slides in conjunction with the wall of the third oil storage chamber. The second reset member is sleeved with the third piston rod. One end of the second reset member is fixedly connected to the cavity wall of the third oil storage chamber, and the other end of the second reset member is fixedly connected to the end face of the third piston disc.

10. A photographic support frame, characterized in that, include: Support base, used for mounting photographic equipment; At least three support foot assemblies are connected to the support base, and each of the support foot assemblies is provided with a support foot locking assembly; The control handle of the photographic support frame as described in any one of claims 1-9 is disposed on the support base, and the control handle is used to unlock or lock the support foot locking assembly.

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