Supporting leg assembly capable of being double-locked and photographing supporting frame

Abstract

The utility model discloses a support leg component and photography support frame that can be double locked, the support leg component that can double locked includes telescopic tube subassembly, telescopic tube subassembly includes outer tube, the first inner tube that passes through in the outer tube and passes through in the first inner tube, the second inner tube that passes through in the first inner tube, the first inner tube can slide along the axial direction relative to the outer tube, and the second inner tube can slide along the axial direction relative to the outer tube. The second inner pipe can slide relative to the first inner pipe in the axial direction. The supporting leg assembly further comprises a first locking assembly, the first locking assembly comprises a first connecting piece, the first connecting piece is connected with one end of the outer pipe, one end of a locking sleeve is connected with the first connecting piece in a sleeved mode, the other end of the locking sleeve is provided with a first abutting part, and the first abutting part is coaxially arranged in the locking sleeve. The inner wall of the first abutting part abuts against the outer wall of the second inner pipe, a gap is formed between the outer wall of the first abutting part and the inner wall of the locking sleeve, the second connecting piece is connected with one end of the first inner pipe, and the side wall of the second connecting piece extends into the gap.

Description

Technical Field

[0001] This utility model relates to the field of photography and videography technology, and in particular to a double-lockable support foot assembly and a photography support frame. Background Technology

[0002] With the increasing demand for photography and video creation, various photography auxiliary equipment has emerged. As one of the most common photography auxiliary equipment, the camera stand can provide stable support for the camera or other shooting devices, reducing image shake caused by handheld or platform instability, thereby improving shooting quality.

[0003] Currently, common photography support frames on the market include monopods, tripods, and some dedicated support structures. They typically use several support leg components to achieve overall expansion and contraction, providing stable support at multiple angles and heights during shooting. These support leg components are generally composed of multiple sections, and their height or angle is adjusted by extending and retracting them. To ensure the stability of the support leg components during use, locking mechanisms are usually installed between the sections.

[0004] However, the locking components in the relevant technologies have the following shortcomings: existing locking components can usually only achieve a single locking method. Even when locking the same set of pipe fittings, the locking force can only be formed on a single contact surface or in a single direction. The lack of multiple safety mechanisms makes it easy to loosen when subjected to large loads or vibrations. Utility Model Content

[0005] The main purpose of this invention is to propose a support foot assembly with dual locking capability, which aims to solve the problem of complex structure and large number of parts in the locking assembly.

[0006] To achieve the above objectives, this utility model proposes a support leg assembly with dual locking capability, comprising:

[0007] A telescopic tube assembly includes an outer tube, a first inner tube passing through the outer tube, and a second inner tube passing through the first inner tube. The first inner tube is slidable axially relative to the outer tube, and the second inner tube is slidable axially relative to the first inner tube.

[0008] The support leg assembly further includes a first locking component, the first locking component comprising:

[0009] A first connector is connected to one end of the outer tube;

[0010] A locking sleeve, one end of which is sleeved with the first connecting member, and the other end of which is provided with a first abutment. The first abutment is coaxially disposed inside the locking sleeve, and the inner wall of the first abutment abuts against the outer wall of the second inner tube. There is a gap between the outer wall of the first abutment and the inner wall of the locking sleeve.

[0011] A second connector is connected to one end of the first inner tube, and the sidewall of the second connector extends into the gap.

[0012] In some embodiments, the outer wall of the first connector is provided with an external thread, and the inner wall of the locking sleeve is provided with an internal thread that matches the external thread. The locking sleeve is threadedly connected to the first connector through the cooperation of the external thread and the internal thread.

[0013] In some embodiments, the outer wall of the first abutment and the inner wall of the second connector are both tapered.

[0014] In some embodiments, the inner wall of the locking sleeve is provided with an annular groove, the annular groove being located at the end of the locking sleeve away from the second connector;

[0015] The first abutment has a mounting protrusion at the end away from the second connector, and the mounting protrusion engages with the annular groove.

[0016] In some embodiments, the system further includes a third inner tube and a fourth inner tube, wherein the third inner tube passes through the second inner tube and the fourth inner tube passes through the third inner tube;

[0017] The double-lockable support leg assembly further includes a second locking assembly, which is connected to one end of the second inner tube and the third inner tube, and is sleeved on the outside of the fourth inner tube. The structure of the second locking assembly is the same as that of the first locking assembly.

[0018] In some embodiments, the dual-lockable support leg assembly further includes a first drive assembly disposed at the other end of the outer tube, wherein the actuating end of the first drive assembly extends into the outer tube and is fixedly connected to the other end of the second inner tube.

[0019] The first driving component includes:

[0020] The mounting shell has a first cavity, and a first opening and a second opening are respectively provided at both ends of the first cavity, and both the first opening and the second opening are in communication with the first cavity.

[0021] Piston assembly, disposed within the first cavity, the piston assembly comprising:

[0022] A piston rod that passes sequentially through the first opening, the first cavity, and the second opening; the outer peripheral wall of the piston rod is provided with a separator for dividing the first cavity into at least two chambers.

[0023] The piston rod has a through-flow first fluid channel inside, one end of which is connected to the outside, and the other end of which passes through the side wall of the piston rod and is connected to one of the at least two chambers.

[0024] In some embodiments, the first drive assembly further includes an elastic element mounted in another of the at least two chambers, the elastic element being used to elastically support the piston rod.

[0025] In some embodiments, a second driving component is further included. The second driving component is disposed at the other end of the second inner tube. The actuating end of the second driving component extends into the second inner tube and is connected to the other end of the third inner tube. The second driving component is used to drive the third inner tube to move axially relative to the second inner tube.

[0026] The structure of the second driving component is the same as that of the first driving component.

[0027] In some embodiments, the first drive component and the second drive component are hydraulic cylinders, and the first drive component and the second drive component are connected by a fluid pipeline.

[0028] This utility model further proposes a photography support frame, including an operating component, a support base, and a plurality of support leg assemblies as described in the foregoing embodiments. The support base is connected to the telescopic rod assemblies of the plurality of support leg assemblies, and the support base is used to mount photography equipment.

[0029] The operating component is connected to the first drive component and the second drive component of each of the support foot assemblies, and the operating component is used to output driving force to the first drive component and the second drive component of each of the support foot assemblies.

[0030] The beneficial effects of this utility model are as follows: by inserting the second connector into the gap between the outer wall of the first abutment and the inner wall of the locking sleeve, a double locking mechanism is formed. On the one hand, the outer wall of the second connector abuts against the inner wall of the locking sleeve, and at the same time, the inner wall of the second connector abuts against the outer wall of the first abutment, forming a first locking, which effectively restricts the axial movement of the first inner tube relative to the outer tube. On the other hand, the inner wall of the first abutment abuts tightly against the outer wall of the second inner tube, generating sufficient friction, forming a second locking, ensuring that the second inner tube will not slide on its own during use. This double locking structure ensures the overall stability and load-bearing capacity of the support foot assembly. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a support foot assembly capable of double locking in one embodiment of the present invention;

[0032] Figure 2 This is a front view of a support leg assembly capable of double locking according to an embodiment of the present invention;

[0033] Figure 3 for Figure 2 Cross-sectional view at point AA;

[0034] Figure 4 for Figure 2 A cross-sectional view from another perspective;

[0035] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0036] Figure 6 This is an exploded view of the first locking component in one embodiment of the present invention;

[0037] Figure 7 for Figure 4 Enlarged view of point C in the middle;

[0038] Figure 8 for Figure 4 Enlarged view of point D in the middle;

[0039] Figure 9 This is an exploded view of the first driving component in one embodiment of the present invention;

[0040] Figure 10 for Figure 4 Enlarged view of point E in the middle.

[0041] Explanation of icon numbers:

[0042] 100. Telescopic tube assembly; 101. Outer tube; 102. First inner tube; 103. Second inner tube;

[0043] 210. First locking assembly;

[0044] 211. First connecting member; 212. Locking sleeve; 212a. Annular groove; 213. First abutment; 213a. Mounting protrusion;

[0045] 214. Second connector;

[0046] 104. Third inner tube;

[0047] 105. Fourth inner tube;

[0048] 220. Second locking assembly;

[0049] 300, First drive assembly; 301, Mounting housing; 301a, First cavity; 301b, First opening; 301c, Second opening; A1, First chamber; A2, Second chamber;

[0050] 302. Piston assembly; 303. Piston rod; 304. Isolator; 303a. First fluid passage; 305. Elastic element;

[0051] 400. Second drive component.

[0052] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0054] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment 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.

[0055] 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.

[0056] Furthermore, the use of terms such as "first" and "second" in this utility model 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 by this utility model.

[0057] Telescopic support leg assemblies are widely used in applications requiring height-adjustable support equipment, such as photography and drawing board support. However, existing locking mechanisms are often complex in structure and have numerous components, increasing production costs, assembly difficulty, and failure rates. Furthermore, the locking effect of traditional locking structures is often unsatisfactory, prone to loosening, affecting safety and stability. Therefore, this invention proposes a simple, reliable, dual-locking support leg assembly to solve the aforementioned technical problems. This embodiment uses a support leg assembly in a photographic tripod as an example for illustration.

[0058] For details, please refer to Figures 1 to 5 The present invention provides a support foot assembly with dual locking capability, which includes:

[0059] The telescopic tube assembly 100 includes an outer tube 101, a first inner tube 102 passing through the outer tube 101, and a second inner tube 103 passing through the first inner tube 102. The first inner tube 102 can slide axially relative to the outer tube 101, and the second inner tube 103 can slide axially relative to the first inner tube 102.

[0060] The support foot assembly also includes a first locking component 210, which includes:

[0061] The first connector 211 is connected to one end of the outer tube 101;

[0062] The locking sleeve 212 has one end connected to the first connecting member 211, and the other end of the locking sleeve 212 is provided with a first abutment 213. The first abutment 213 is coaxially disposed inside the locking sleeve 212, and the inner wall of the first abutment 213 abuts against the outer wall of the second inner tube 103. There is a gap between the outer wall of the first abutment 213 and the inner wall of the locking sleeve 212.

[0063] The second connector 214 is connected to one end of the first inner tube 102, and the sidewall of the second connector 214 extends into the gap.

[0064] In this embodiment, the telescopic tube assembly 100 serves to flexibly adjust the height of the support leg to meet the needs of different usage scenarios. The telescopic tube assembly 100 can employ a multi-stage telescopic structure, including an outer tube 101, a first inner tube 102 passing through the outer tube 101, and a second inner tube 103 passing through the first inner tube 102. The first inner tube 102 can slide axially relative to the outer tube 101, and the second inner tube 103 can slide axially relative to the first inner tube 102. The height is adjusted step-by-step through the relative movement of each tube. It is understood that this embodiment only uses an outer tube 101, a first inner tube 102, and a second inner tube 103 as an example. In other embodiments, more tubes can be used, such as a third inner tube 104, a fourth inner tube 105, etc., to achieve a wider height adjustment range and finer adjustment accuracy.

[0065] In this embodiment, the first locking assembly 210 functions to fix the relative positions between the various levels of pipe fittings, preventing relative slippage during use. The first locking assembly 210 includes a first connector 211, a locking sleeve 212, and a second connector 214. Locking is primarily achieved by the second inner tube 103 driving the second connector 214 to extend into or disengage from the gap between the outer wall of the first abutment 213 and the inner wall of the locking sleeve 212, thus locking or unlocking. The first connector 211 is fixedly connected to one end of the outer tube 101, providing basic support for the entire locking assembly. One end of the locking sleeve 212 is sleeved with the first connector 211, and the other end is provided with a first abutment 213, which is coaxially disposed within the locking sleeve 212. Its inner wall abuts against the outer wall of the second inner tube 103, forming a gap between the outer wall and the inner wall of the locking sleeve 212. The second connector 214 is connected to one end of the first inner tube 102, and its sidewall extends into the aforementioned gap.

[0066] In practical applications, taking a photography tripod as an example, when adjusting the tripod height, the first step is to unlock it. During the unlocking process, the user can manipulate the drive component to move the first inner tube 102. For example, the drive component can move the first inner tube 102 along a first direction (e.g., upwards), thereby causing the second connector 214 to disengage from the gap between the outer wall of the first abutment 213 and the inner wall of the locking sleeve 212, thus unlocking the tripod. It should be understood that in this embodiment, the second connector 214 is not completely disengaged.

[0067] Thus, after unlocking, the second inner tube 103 can slide out of the first inner tube 102 under the action of an external force (the external force can be gravity or the user's pushing or pulling force), thereby achieving height adjustment. After finding a suitable height, the operation on the drive component is canceled, the drive component is reset, and then the first inner tube 102 is moved in the second direction (e.g., downward), at which point the second connector 214 re-enters the gap between the outer wall of the first abutment 213 and the inner wall of the locking sleeve 212.

[0068] When the second connector 214 is inserted into the gap, the outer wall of the second connector 214 abuts against the inner wall of the locking sleeve 212, and at the same time, the inner wall of the second connector 214 abuts against the outer wall of the first abutment 213, forming a tight locking state. This locking state effectively restricts the axial movement of the first inner tube 102 relative to the outer tube 101, so that the outer tube 101 and the first inner tube 102 maintain a relatively fixed positional relationship, thereby achieving the first locking.

[0069] At the same time, the inner wall of the first abutment 213 is in close contact with the outer wall of the second inner tube 103, generating sufficient friction. This contact relationship restricts the axial movement of the second inner tube 103 relative to the first inner tube 102, achieving a second locking, thereby ensuring that the second inner tube 103 will not slide or sink during use.

[0070] The beneficial effects of this utility model are as follows: By adopting a locking assembly structure consisting of a first connecting member 211, a locking sleeve 212, and a second connecting member 214, the first locking assembly 210 has a simple and compact structure, consisting of only three main parts, which greatly reduces production costs and assembly difficulty; secondly, by inserting the second connecting member 214 into the gap between the outer wall of the first abutment 213 and the inner wall of the locking sleeve 212, a carefully designed double locking mechanism is formed. On the one hand, the outer wall of the second connecting member 214 abuts against the inner wall of the locking sleeve 212, and on the other hand, the inner wall of the second connecting member 214 abuts against the first abutment 213. The outer wall of the top 213 abuts against the second inner tube 102, forming a first locking mechanism that effectively restricts the axial movement of the first inner tube 102 relative to the outer tube 101. On the other hand, the inner wall of the first abutment 213 abuts tightly against the outer wall of the second inner tube 103, generating sufficient friction to form a second locking mechanism, ensuring that the second inner tube 103 will not slide during use. This double-locking structure guarantees the overall stability and load-bearing capacity of the support leg assembly. Furthermore, the entire locking and unlocking process can be completed with a single operation; users can easily adjust the height and lock the tube by controlling the drive component, making operation simple and convenient. In addition, the surface contact between the first abutment 213 and the second inner tube 103 effectively avoids localized wear caused by point contact, extending the product's lifespan. This is particularly suitable for equipment requiring precise positioning and high load-bearing capacity, such as photography tripods.

[0071] It should be noted that in this embodiment, the second inner tube 103 can be driven by a driving component, which can be a mechanical or electrical device such as a motor, hydraulic cylinder, or pneumatic cylinder, or it can be manually operated. In some high-end applications, a remote control or intelligent control system can also be configured to achieve remote or automatic adjustment functions.

[0072] Continue reading Figure 5 and Figure 6 In this embodiment, the outer wall of the first connecting member 211 is provided with an external thread, and the inner wall of the locking sleeve 212 is provided with an internal thread that matches the external thread. The locking sleeve 212 is threadedly connected to the first connecting member 211 through the engagement of the external and internal threads. In this way, the threaded connection structure allows the locking sleeve 212 to move precisely axially relative to the first connecting member 211, thereby achieving fine adjustment of the locking degree.

[0073] Specifically, by rotating the locking sleeve 212 with external force, the locking sleeve 212 can drive the first abutment 213 to move axially under the action of the threaded pair. For example, when the locking sleeve 212 rotates clockwise, the locking sleeve 212 moves as a whole towards the first connecting member 211, causing the first abutment 213 located at the other end of the locking sleeve 212 to push inward, increasing the squeezing force of the first abutment 213 on the outer wall of the second inner tube 103. At the same time, the gap between the outer wall of the first abutment 213 and the inner wall of the locking sleeve 212 decreases, generating a larger wedge-shaped locking force on the side wall of the second connecting member 214 inserted into the gap.

[0074] In this way, the rotation angle of the locking sleeve 212 directly determines the extent to which the first abutment 213 extends between the second connector 214 and the second inner tube 103, thereby achieving continuous and precise adjustment of the locking force. Users can select an appropriate locking force according to actual load requirements, ensuring sufficient locking effect while avoiding component damage caused by over-locking.

[0075] In this embodiment, the external and internal threads can be standard metric threads with a pitch of 1.5mm. This ensures that the axial displacement of the locking sleeve 212 is 1.5mm per revolution, facilitating precise control by the user. Considering anti-loosening performance, a self-locking thread can be used, which can maintain a locked state without loosening under vibration.

[0076] In addition, the outer surface of the locking sleeve 212 can be designed with anti-slip textures to increase the friction between the user's fingers and the locking sleeve, making it easier to apply sufficient torque to complete the locking operation. The locking sleeve 212 can be made of wear-resistant nylon, which has sufficient strength to withstand the locking force and also has a certain degree of elasticity to cushion vibrations when locked.

[0077] The threaded locking structure in this embodiment not only simplifies the locking operation, allowing users to complete the locking with just a simple rotation, but also provides locking force control capabilities to adapt to the support needs of equipment of different weights, thereby improving the applicability of the support foot assembly and the user experience.

[0078] Continue reading Figure 5 and Figure 6 In this embodiment, the outer wall of the first abutment 213 and the inner wall of the second connector 214 are both tapered.

[0079] In this embodiment, the outer wall of the first abutment 213 and the inner wall of the second connector 214 are tapered because the tapered contact surface can significantly improve the locking effect and ease of operation. When the locking sleeve 212 rotates, the wedge-shaped force generated between the tapered surfaces is much greater than that between the parallel surfaces, which allows for a stronger locking effect under the same rotational torque.

[0080] For example, the outer wall taper of the first abutment 213 can be designed to be 3° to 5°, and the inner wall taper of the second connector 214 matches it. The tapered surfaces move axially and press against each other, generating a radial force. This radial force, on the one hand, makes the first abutment 213 press more tightly against the outer wall of the second inner tube 103, and on the other hand, enhances the fixing effect between the second connector 214 and the first inner tube 102, forming a complete force transmission link.

[0081] The conical contact surface also possesses self-locking properties. Once locked, due to the friction and wedge effect between the conical surfaces, it is not easily loosened even in vibration environments, thus improving the reliability of the locking. At the same time, the conical structure also provides a certain guiding function, making the locking operation smoother and reducing the risk of jamming.

[0082] Furthermore, the tapered design can compensate for tolerances during manufacturing and assembly to some extent, improving product consistency and stability. Even after long-term use, with slight wear on the contact surfaces, the tapered structure maintains a good locking effect, extending the product's lifespan.

[0083] Continue reading Figure 5 and Figure 6 In this embodiment, the inner wall of the locking sleeve 212 is constructed with an annular groove 212a, which is located at the end of the locking sleeve 212 away from the second connector 214.

[0084] The end of the first abutment 213 away from the second connector 214 has a mounting protrusion 213a, which engages with the annular groove 212a.

[0085] In this embodiment, the snap-fit ​​structure between the annular groove 212a and the mounting protrusion 213a is provided to ensure that when adjusting the locking degree, the locking sleeve 212 rotates while the first abutment 213 does not rotate with it, but only moves axially. This structural design solves a common problem in traditional locking mechanisms: the locking component may generate relative torsional friction with the locked object during rotation, resulting in unstable locking or wear on the surface of the locked object.

[0086] Specifically, the annular groove 212a is circumferentially distributed on the inner wall of the locking sleeve 212, forming a complete circular structure. Its axial width is slightly larger than the axial thickness of the mounting protrusion 213a, ensuring that the mounting protrusion 213a can move axially within a limited range within the annular groove 212a. The mounting protrusion 213a is designed as an annular structure that matches the annular groove 212a, and the radial height of the protrusion is adapted to the radial depth of the annular groove 212a, ensuring that the two can be reliably engaged and are not easily disengaged.

[0087] When the user rotates the locking sleeve 212, the locking sleeve 212 will move axially due to the threaded connection between the locking sleeve 212 and the first connecting member 211. The snap-fit ​​structure between the annular groove 212a and the mounting protrusion 213a ensures that the first abutment 213 can only move axially with the locking sleeve 212, and will not rotate with the locking sleeve 212. This ensures that there is only pure axial relative movement between the first abutment 213 and the outer wall of the second inner tube 103, avoiding wear and instability caused by rotational friction.

[0088] In addition, this snap-fit ​​structure helps to maintain the correct positioning and guidance of the first abutment 213, preventing it from tilting or twisting during use, ensuring that the abutment force is evenly distributed on the outer wall of the second inner tube 103, and improving the consistency and reliability of the locking effect.

[0089] To enhance the durability of the snap-fit ​​structure, the contact surfaces of the annular groove 212a and the mounting protrusion 213a can be specially treated to improve wear resistance and lubricity. Furthermore, an appropriate gap is maintained between them to ensure that the first abutment 213 can move freely axially without excessive wobbling, thus maintaining the stability of the overall structure.

[0090] See Figure 7 In this embodiment, the support foot assembly further includes a third inner tube 104 and a fourth inner tube 105, wherein the third inner tube 104 passes through the second inner tube 103 and the fourth inner tube 105 passes through the third inner tube 104.

[0091] The support foot assembly with dual locking also includes a second locking assembly 220. The second locking assembly 220 is connected to one end of the second inner tube 103 and the third inner tube 104, and is sleeved on the outside of the fourth inner tube 105. The structure of the second locking assembly 220 is the same as that of the first locking assembly 210.

[0092] In this embodiment, based on the outer tube 101, first inner tube 102, and second inner tube 103 of the aforementioned embodiments, a multi-stage telescopic structure is formed by adding a third inner tube 104 and a fourth inner tube 105. The purpose is to achieve a wider range of height adjustment capabilities. This multi-stage telescopic design allows the support leg assembly to maintain a small storage volume while reaching a higher working height after unfolding, meeting the needs of more diverse usage scenarios. For example, in the field of photography, this multi-stage support leg can adapt to various shooting needs, from low-angle macro shooting to high-angle overhead shooting.

[0093] The third inner tube 104 and the fourth inner tube 105 continue the design principles of the inner and outer tubes 101 in the aforementioned embodiments. Appropriate gaps are left between each tube to ensure smooth sliding, while maintaining sufficient contact area to ensure structural stability. Each tube can adopt a material gradient design, that is, from the outer tube 101 to the innermost tube, materials with higher strength and lighter weight are used successively. For example, the outer tube 101 can be made of aluminum alloy, while the innermost tube can be made of carbon fiber composite material, which reduces the overall weight while ensuring strength.

[0094] The second locking assembly 220 has the same structure as the first locking assembly 210, including components such as a connector, a locking sleeve 212, and a top abutment, and adopts the same locking principle. The second locking assembly 220 is installed at the connection between the second inner tube 103 and the third inner tube 104, and is responsible for locking the third inner tube 104 and the fourth inner tube 105, forming the same double locking effect as the first locking assembly 210.

[0095] In some embodiments, the first locking component 210 and the second locking component 220 may work in conjunction to achieve one-click locking or unlocking of multiple tubes.

[0096] See Figure 8 and Figure 9 In this embodiment, the double-lockable support foot assembly also includes a first drive assembly 300, which is disposed at the other end of the outer tube 101. The execution end of the first drive assembly 300 extends into the outer tube 101 and is fixedly connected to the other end of the second inner tube 103.

[0097] The first drive component 300 includes:

[0098] Mounting shell 301 has a first cavity 301a. The first cavity 301a has a first opening 301b and a second opening 301c at both ends. The first opening 301b and the second opening 301c are both connected to the first cavity 301a.

[0099] Piston assembly 302, disposed within the first cavity 301a, includes:

[0100] The piston rod 303 passes through the first opening 301b, the first cavity 301a and the second opening 301c in sequence. The outer peripheral wall of the piston rod 303 is provided with a partition 304 for dividing the first cavity 301a into at least two chambers.

[0101] The piston rod 303 has a through first fluid channel 303a inside. One end of the first fluid channel 303a is connected to the outside, and the other end passes through the side wall of the piston rod 303 and is connected to one of at least two chambers (e.g., the first chamber A1 and the second chamber A2).

[0102] In this embodiment, a fluid drive mechanism is introduced to provide power assistance for the locking and unlocking process, thereby improving the ease of operation and control precision.

[0103] The first drive assembly 300 includes a mounting housing 301 and a piston assembly 302. The mounting housing 301 has a first cavity 301a, with a first opening 301b and a second opening 301c at each end. Both openings 301b and 301c communicate with the first cavity 301a, forming a sealed space for fluid operation. The piston assembly 302 is disposed within the first cavity 301a and includes a piston rod 303, which sequentially passes through the first opening 301b, the first cavity 301a, and the second opening 301c. An isolating element 304, typically a sealing ring or a piston head, is provided on the outer peripheral wall of the piston rod 303 to divide the first cavity 301a into at least two chambers. The piston rod 303 has a through first fluid channel 303a inside. One end of the first fluid channel 303a is connected to the outside, and the other end passes through the side wall of the piston rod 303 and is connected to one of at least two chambers. In this embodiment, the fluid channel is connected to the second chamber A2.

[0104] In this embodiment, fluid enters from the external connecting end of the first fluid channel 303a, flows through the first fluid channel 303a inside the piston rod 303, and then enters the second chamber A2 from the opening in the side wall of the piston rod 303 at the other end. When the fluid enters the second chamber A2, the pressure increases, pushing the isolator 304 to generate a thrust in the first direction (e.g., upward) on the piston rod 303. Since the piston rod 303 is fixedly connected to the second inner tube 103, this thrust is transmitted to the second inner tube 103, causing the second inner tube 103 to rise, thereby pulling the second connector 214 out of the gap between the locking sleeve 212 and the first abutment 213, achieving the unlocked state.

[0105] Conversely, when locking is required, the control fluid flows back from the second chamber A2 or is injected into the first chamber A1, generating a thrust in a second direction (e.g., downward). This thrust causes the second inner tube 103 to descend, pulling the second connector 214 into the gap between the locking sleeve 212 and the first abutment 213, thus achieving the locking state.

[0106] In this embodiment, the fluid can be hydraulic oil or gas, corresponding to hydraulic drive and pneumatic drive, respectively. Hydraulic drive has a large output force and precise position control capability, making it suitable for scenarios involving heavy equipment; pneumatic drive has a fast response speed and a simple system, making it suitable for light-load scenarios requiring rapid adjustment.

[0107] In addition, in embodiments of the multi-stage telescopic tube structure, the first drive assembly 300 can work in conjunction with the second drive assembly 400, simultaneously controlling multiple locking points through an integrated hydraulic or pneumatic system to achieve one-button locking or unlocking. The control system can employ electronic valves and a microprocessor, supporting remote control and preset position memory functions, further improving ease of use.

[0108] In this embodiment, the fluid-driven locking system combines the traditional mechanical locking mechanism with a modern fluid power system, which retains the reliability of mechanical locking while increasing the flexibility and convenience of operation.

[0109] Continue reading Figure 8 In this embodiment, the first drive assembly 300 further includes an elastic element 305, which is installed in one of the at least two chambers and is used to elastically support the piston rod 303.

[0110] In this embodiment, a mechanical elastic element is introduced to complement the fluid drive system, thereby improving the system's reliability and responsiveness.

[0111] Specifically, the elastic element 305 can be installed in the first chamber A1 to provide a reset thrust for the piston rod 303. When the fluid pressure drives the piston rod 303 to move in the first direction to achieve the unlocked state, the elastic element 305 is compressed and stores elastic potential energy. When the fluid pressure decreases or is released, the elastic element 305 releases the stored energy, pushing the piston rod 303 to move in the second direction, causing the system to return to the locked state.

[0112] In this embodiment, the elastic element 305 can be a metal helical spring, which has advantages such as simple structure, reliable performance, and low cost. Furthermore, springs of different stiffness can be selected according to different load requirements to match different application scenarios. Besides helical springs, the elastic element 305 can also take other forms, such as disc springs, wave springs, or polyurethane elastomers.

[0113] Thus, the combination of the elastic reset mechanism and the fluid drive system constitutes a dual protection mechanism of "dynamic active control and static passive protection," which not only allows users to make precise height adjustment and locking control, but also automatically ensures system safety in abnormal situations.

[0114] See Figure 10 In this embodiment, the double-lockable support foot assembly also includes a second drive assembly 400. The second drive assembly 400 is disposed at the other end of the second inner tube 103. The execution end of the second drive assembly 400 extends into the second inner tube 103 and is connected to the other end of the third inner tube 104. The second drive assembly 400 is used to drive the third inner tube 104 to move axially relative to the second inner tube 103.

[0115] The structure of the second drive component 400 is the same as that of the first drive component 300.

[0116] In this embodiment, by adding a second drive assembly 400, the fluid drive mechanism is extended into a multi-stage telescopic tube structure, thereby achieving control over the third inner tube 104 and the fourth inner tube 105. The second drive assembly 400 continues the design concept of the first drive assembly 300, also including core components such as the mounting shell 301, piston assembly 302, and elastic element 305, and adopts the same fluid drive principle. The second drive assembly 400 is installed at the end of the second inner tube 103, and its actuating end is fixedly connected to the end of the third inner tube 104. By controlling the fluid pressure, the axial movement of the third inner tube 104 relative to the second inner tube 103 is achieved, thereby controlling the locking state of the second locking assembly 220.

[0117] In this embodiment, the first drive component 300 can be connected to the second drive component 400 via a fluid passage, thereby enabling a one-button unlocking and one-button locking linkage function. Specifically, the fluid passages of the first drive component 300 and the second drive component 400 can be interconnected through connecting pipes installed in each inner tube, forming a fluid system. When pressurized fluid is introduced, the pressure can be simultaneously transmitted to both drive components, causing them to work together and act synchronously. Thus, the user only needs to operate a control valve or button to simultaneously control the locking state of all inner tubes. For example, pressing the "unlock" button will inject pressurized fluid into the corresponding chamber of each drive component, synchronously pushing each piston rod 303 to move, causing all locking components to unlock simultaneously; conversely, releasing the pressure or applying pressure to the chamber in the opposite direction can achieve synchronous locking of all locking components.

[0118] Furthermore, the system can also be designed to support a single-stage control mode. By switching valve configurations, users can choose to control only a specific level of the inner pipe, achieving more precise height adjustment. This flexibility is particularly suitable for specialized applications requiring precise positioning.

[0119] The design of the multi-stage drive linkage mechanism not only simplifies user operation and improves adjustment efficiency, but also enhances the coordination and consistency of the entire support system, making the height adjustment process more stable and controllable.

[0120] Furthermore, in this embodiment, the first drive assembly 300 and the second drive assembly 400 are hydraulic cylinders, and the first drive assembly 300 and the second drive assembly 400 are connected by an oil delivery hose.

[0121] This utility model further proposes a photographic support frame, including an operating component, a receiving base, and multiple support leg assemblies as described in the foregoing embodiments. The specific structure of the support leg assembly is as described in the above embodiments. Since this photographic support frame adopts all the technical solutions of all the above embodiments, it at least has all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The receiving base is connected to the telescopic rod assembly of the multiple support leg assemblies, and the receiving base is used to mount photographic equipment.

[0122] The operating component is connected to the first drive component 300 and the second drive component 400 of each support foot assembly, and the operating component is used to output driving force to the first drive component 300 and the second drive component 400 of each support foot assembly.

[0123] In this embodiment, the support base is connected to the telescopic tube assembly 100 of multiple support leg assemblies to form a stable triangular support structure. The support base can be made of high-strength aluminum alloy with an anodized surface, featuring lightweight and high rigidity. The support base can be equipped with standard 1 / 4-inch and 3 / 8-inch threaded interfaces, compatible with most photographic equipment on the market, including cameras, gimbals, and camcorders. A level can also be installed at the center of the support base to help users quickly adjust the level of the support frame.

[0124] The operating components are integrated on the side of the receiving seat, forming a unified control center, which is connected to the first drive assembly 300 and the second drive assembly 400 of each support foot assembly. The operating components include a fluid pressure control system and a human-machine interface, used to output driving force to the drive assemblies of each support foot assembly, thereby controlling the height and locking status of the support feet.

[0125] The control system can adopt a centralized design, including components such as micro-pumps, solenoid valve assemblies, microprocessor control units, and touch-screen operation panels. Users can select operating modes (all systems linked or individual control), adjust height, and control locking status via the touch panel. In some embodiments, the system can support multiple preset height memory functions, allowing users to save frequently used height settings and recall them with a single click, greatly improving work efficiency.

[0126] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A support leg assembly with dual locking capability, characterized in that, The dual-lockable support leg assembly includes: A telescopic tube assembly includes an outer tube, a first inner tube passing through the outer tube, and a second inner tube passing through the first inner tube. The first inner tube is slidable axially relative to the outer tube, and the second inner tube is slidable axially relative to the first inner tube. The support leg assembly further includes a first locking component, the first locking component comprising: A first connector is connected to one end of the outer tube; A locking sleeve, one end of which is sleeved with the first connecting member, and the other end of which is provided with a first abutment. The first abutment is coaxially disposed inside the locking sleeve, and the inner wall of the first abutment abuts against the outer wall of the second inner tube. There is a gap between the outer wall of the first abutment and the inner wall of the locking sleeve. A second connector is connected to one end of the first inner tube, and the sidewall of the second connector extends into the gap.

2. The double-lockable support leg assembly according to claim 1, characterized in that, The outer wall of the first connector is provided with an external thread, and the inner wall of the locking sleeve is provided with an internal thread that matches the external thread. The locking sleeve is threadedly connected to the first connector through the cooperation of the external thread and the internal thread.

3. The double-lockable support leg assembly according to claim 2, characterized in that, The outer wall of the first abutment and the inner wall of the second connector are both tapered.

4. The double-lockable support leg assembly according to claim 2, characterized in that, The inner wall of the locking sleeve is provided with an annular groove, which is located at the end of the locking sleeve away from the second connector. The first abutment has a mounting protrusion at the end away from the second connector, and the mounting protrusion engages with the annular groove.

5. The double-lockable support leg assembly according to claim 1, characterized in that, It also includes a third inner tube and a fourth inner tube, wherein the third inner tube passes through the second inner tube and the fourth inner tube passes through the third inner tube; The double-lockable support leg assembly further includes a second locking assembly, which is connected to one end of the second inner tube and the third inner tube, and is sleeved on the outside of the fourth inner tube. The structure of the second locking assembly is the same as that of the first locking assembly.

6. The double-lockable support leg assembly according to claim 5, characterized in that, The double-lockable support leg assembly also includes a first drive assembly, which is disposed at the other end of the outer tube, wherein the actuating end of the first drive assembly extends into the outer tube and is fixedly connected to the other end of the second inner tube. The first driving component includes: The mounting shell has a first cavity, and a first opening and a second opening are respectively provided at both ends of the first cavity, and both the first opening and the second opening are in communication with the first cavity. Piston assembly, disposed within the first cavity, the piston assembly comprising: A piston rod that passes sequentially through the first opening, the first cavity, and the second opening; the outer peripheral wall of the piston rod is provided with a partition for dividing the first cavity into at least two chambers. The piston rod has a through-flow first fluid channel inside, one end of which is connected to the outside, and the other end of which passes through the side wall of the piston rod and is connected to one of the at least two chambers.

7. The double-lockable support leg assembly according to claim 6, characterized in that, The first drive assembly further includes an elastic element mounted in another of the at least two chambers, the elastic element being used to elastically support the piston rod.

8. The double-lockable support leg assembly according to claim 6, characterized in that, It also includes a second drive assembly, which is disposed at the other end of the second inner tube. The execution end of the second drive assembly extends into the second inner tube and is connected to the other end of the third inner tube. The second drive assembly is used to drive the third inner tube to move axially relative to the second inner tube. The structure of the second driving component is the same as that of the first driving component.

9. The double-lockable support leg assembly according to claim 8, characterized in that, The first drive assembly and the second drive assembly are hydraulic cylinders, and the first drive assembly and the second drive assembly are connected by fluid pipes.

10. A photographic support frame, characterized in that, The device includes an operating component, a receiving base, and a plurality of doubly lockable support leg assemblies as described in any one of claims 1 to 9, wherein the receiving base is connected to a telescopic rod assembly of the plurality of support leg assemblies, and the receiving base is used for mounting photographic equipment; The operating component is connected to the first drive component and the second drive component of each of the dual-lockable support foot assemblies, and the operating component is used to output driving force to the first drive component and the second drive component of each of the support foot assemblies.

Images