Photographic equipment connecting device

Abstract

A photographic equipment connecting device, comprising a first connecting arm (1), a second connecting arm (2), two ball-head push rods (3), a locking member (4) and a hydraulic push rod (5), wherein one end of the first connecting arm (1) is provided with a first ball-head socket (11), and the other end thereof is provided with a first connecting hole (12), a first oil passage (13) being formed between the first ball-head socket (11) and the first connecting hole (12); one end of the second connecting arm (2) is provided with a second ball-head socket (21), and the other end thereof is provided with a connecting sleeve (22) capable of passing through the first connecting hole (12), a second oil passage (23) being formed between the second ball-head socket (21) and the connecting sleeve (22); and the connecting sleeve (22) is provided with at least one oil hole (220) communicating the first oil passage (13) and the second oil passage (23). The connecting device can achieve independent locking of ball heads and the two connecting arms, facilitating flexible operations.

Description

Photographic equipment connecting device TECHNICAL FIELD

[0001] The present application relates to the field of photographic equipment, in particular to a photographic equipment connecting device. BACKGROUND

[0002] With the progress of modern life, photography has become an indispensable part of people's lives. Photographic equipment includes photographic equipment, tripods, etc. The tripod is erected under the photographic equipment to support it.

[0003] In some shooting scenes, auxiliary photographic equipment such as fill light, monitor or mobile phone may be needed to assist photography, or other photographic equipment such as mobile phone, fill light, etc. may be needed to be erected directly at the shooting position, which requires the use of a connecting device for connection.

[0004] The existing connecting device is generally a ball head synchronous mechanism, which includes two connecting arms, a locking knob, a connecting rod and a ball head. The two connecting arms are relatively rotatable, one end of each connecting arm is provided with a ball head seat, and the ball head connected with the photographic equipment is arranged in the ball head seat and can rotate in the ball head seat. The other end of the connecting arm is connected with the locking knob, and the connecting rod is arranged in the connecting arm. One end of the connecting rod is connected with the locking knob, and the other end can abut against the ball head. When in use, the locking knob is rotated, and the two connecting arms can move towards each other to abut against each other. At the same time, the connecting rod is driven by the knob to move, and the connecting rod abuts the ball head to the ball head seat, so that the ball head cannot rotate relative to the ball head seat, and the fixing of the photographic equipment is completed. The existing photographic equipment connecting device cannot control the ball head and the two connecting arms separately when adjusting the ball head, and the operation is not convenient enough.

[0005] SUMMARY

[0006] The main purpose of the present application is to provide a photographic equipment connecting device, which aims to improve the operation convenience during the adjustment process of the photographic equipment connecting device.

[0007] To achieve the above-mentioned purpose, the present application provides a photographic equipment connecting device, which comprises:

[0008] A first connecting arm, one end of the first connecting arm is provided with a first ball head seat, and the other end is provided with a first connecting hole, the first connecting hole is a through hole, and a first oil channel is constructed between the first ball head seat and the first connecting hole;

[0009] A second connecting arm, one end of the second connecting arm is provided with a second ball head seat, and the other end is provided with a connecting sleeve which can pass through the first connecting hole, the connecting sleeve is arranged at an angle with the body of the second connecting arm, a second oil channel is constructed between the second ball head seat and the connecting sleeve, and the connecting sleeve is provided with at least one oil hole for connecting the first oil channel and the second oil channel;

[0010] Two ball head push rods are respectively located in the first ball head seat and the second ball head seat, and abut against the first ball head located in the first ball head seat and the second ball head located in the second ball head seat;

[0011] A locking piece is connected with the connecting sleeve and used for locking the first connecting arm and the second connecting arm;

[0012] A hydraulic push rod is located in the connecting sleeve and used for pushing the hydraulic oil in the first oil way and / or the second oil way to the ball head push rod, so that the ball head push rod abuts against the ball head.

[0013] In some embodiments, the ball head push rod comprises:

[0014] A first ball head push rod is located in the first ball head seat, and the first ball head push rod is located between the first ball head and the inlet of the first oil way;

[0015] A second ball head push rod is located in the second ball head seat, and the second ball head push rod is located between the second ball head and the inlet of the second oil way.

[0016] In some embodiments, the first ball head push rod comprises:

[0017] A first push rod seat is connected with the port of the first oil way, and a middle part of the first push rod seat is provided with a first oil injection hole used for injecting oil into the first oil way;

[0018] A first floating piece abuts against the first ball head at one end and is aligned with the first oil injection hole at the other end, and the first floating piece can ascend and descend along the side wall of the first push rod seat;

[0019] The second ball head push rod comprises:

[0020] A second push rod seat is connected with the port of the second oil way, and a middle part of the second push rod seat is provided with a second oil injection hole used for injecting oil into the second oil way;

[0021] A second floating piece abuts against the second ball head at one end and is aligned with the second oil injection hole at the other end, and the second floating piece can ascend and descend along the side wall of the second push rod seat.

[0022] In some embodiments, the connecting sleeve is provided separately from the first connecting arm, and the connecting sleeve comprises a first connecting section used for connecting with the first connecting hole and a second connecting section penetrating through the first connecting hole.

[0023] In some embodiments, a free end of the second connecting section is provided with a thread used for connecting with the locking piece.

[0024] In some embodiments, the side wall of the second connecting section is provided with at least one oil groove, each of the oil grooves is provided with a plurality of oil holes.

[0025] In some embodiments, the locking member comprises a first locking member and a second locking member, the second connecting section comprises a first threaded section and a second threaded section, the first threaded section is connected with the first locking member through the first connecting hole, and is used for locking the first connecting arm and the second connecting arm; the second threaded section is connected with the second locking member through the first locking member.

[0026] In some embodiments, the photographic equipment connecting device further comprises an elastic member, the port of the second threaded section is configured with an oil groove through the second oil channel, the elastic member is arranged in the oil groove, one end of the hydraulic push rod is inserted into the oil groove to abut against the elastic member, and the other end abuts against the second locking member.

[0027] In some embodiments, the first oil channel comprises a first oil cavity and a second oil cavity arranged along the first connecting arm axis, the diameter of the first oil cavity is greater than the diameter of the second oil cavity; the second oil channel is configured in the same way as the first oil channel.

[0028] In some embodiments, the photographic equipment connecting device further comprises a toothed disc between the first connecting arm and the second connecting arm.

[0029] The present application sets the first connecting arm and the second connecting arm which can rotate relatively, sets the ball head seat on each connecting arm, sets the ball head which can rotate relatively in the ball head seat, connects the photographic equipment through the ball head, sets the first oil channel and the second oil channel connected with each ball head seat, sets the hydraulic oil in the first oil channel and / or the second oil channel to drive the ball head push rod to push the ball head to the ball head seat to lock the ball head, so that the ball head cannot rotate relative to the ball head seat, to fix the photographic equipment connected with the ball head. The present application can realize the independent locking of the ball head and the two connecting arms respectively, that is, the present application can adjust the angle of the two connecting arms and the angle of the photographic equipment relative to the connecting arm respectively, and the operation is flexible and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 is a structural schematic view of an embodiment of the photographic equipment connecting device of the present application;

[0031] Fig. 2 is an exploded view of an embodiment of the photographic equipment connecting device of the present application;

[0032] Fig. 3 is a structural schematic view of the photographic equipment connecting device of the present application from one perspective;

[0033] Fig. 4 is a sectional view of A-A in Fig. 3;

[0034] Fig. 5 is a schematic diagram of a partial structure of another embodiment of the photographic equipment connecting device.

[0035] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0036] The schemes in the embodiments of the present application will be clearly and completely described in combination with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directionality indications also change accordingly.

[0038] It should also be noted that when an element is referred to as being “fixed to” or “set on” another element, it can be directly on the other element or can have a middle element simultaneously. When an element is referred to as being “connected” to another element, it can be directly connected to the other element or can have a middle element simultaneously.

[0039] In addition, the description involving “first”, “second” and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that the technical solutions can be realized by those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is also not within the scope of protection claimed by the present application.

[0040] Referring to Figs. 1 to 4, the present application provides a photographic equipment connecting device, comprising:

[0041] The first connecting arm 1 is provided with a first ball head seat 11 at one end and a first connecting hole 12 at the other end. The first connecting hole 12 is a through hole, and a first oil way 13 is configured between the first ball head seat 11 and the first connecting hole 12;

[0042] The second connecting arm 2 is provided with a second ball head seat 21 at one end and a connecting sleeve 22 capable of penetrating the first connecting hole 12 at the other end. The connecting sleeve 22 is arranged at an angle with the body of the second connecting arm 2. A second oil passage 23 is configured between the second ball head seat 21 and the connecting sleeve 22. The connecting sleeve 22 is provided with at least one oil hole 220 for connecting the first oil passage 13 and the second oil passage 23.

[0043] The two ball head push rods 3 are respectively located in the first ball head seat 11 and the second ball head seat 21 and abut against the first ball head 14 in the first ball head seat 11 and the second ball head 24 in the second ball head seat 21.

[0044] The locking member 4 is connected with the connecting sleeve 22 and used for locking the first connecting arm 1 and the second connecting arm 2.

[0045] The hydraulic push rod 5 is located in the connecting sleeve 22 and used for pushing the hydraulic oil in the first oil passage 13 and / or the second oil passage 23 to the ball head push rod 3 so as to press the ball head push rod 3 against the ball head.

[0046] In the embodiment, the connecting device mainly comprises the first connecting arm 1, the second connecting arm 2, the two ball head push rods 3, the locking member 4 and the hydraulic push rod 5.

[0047] The first connecting arm 1 and the second connecting arm 2 are used for connecting two photographic equipment, for example, one of which is connected with a tripod and the other of which is connected with a video camera. Specifically, the first connecting arm 1 is provided with the first ball head seat 11 at one end, the first ball head seat 11 being used for connecting with the photographic equipment, and the first connecting arm 1 is provided with the first connecting hole 12 at the other end. The second connecting arm 2 is provided with the second ball head seat 21 at one end, the second ball head seat 21 also being used for connecting with the photographic equipment. The second connecting arm 2 is provided with the connecting sleeve 22 at the other end, the connecting sleeve 22 being capable of penetrating the first connecting hole 12 to realize the rotary connection of the two arms. The first connecting arm 1 can rotate 360° relative to the second connecting arm 2.

[0048] The first ball head seat 11 is provided with the first ball head 14 and the second ball head seat 21 is provided with the second ball head 24. Each ball head can rotate relative to the ball head seat connected therewith to realize the relative adjustment of the angle of the photographic equipment connected with the ball head. The first ball head seat 11 and the second ball head seat 21 are respectively provided with the ball head push rod 3. Each ball head push rod 3 can abut against the adjacent ball head. The first oil passage 13 is configured between the first ball head seat 11 and the first connecting hole 12 of the first connecting arm 1. The second oil passage 23 is configured between the second connecting arm 2 and the connecting sleeve 22. The oil hole 220 on the connecting sleeve 22 connects the two oil passages.

[0049] The locking member 4 is connected with the connecting sleeve 22, and the locking member 4 can be locked with the first connecting arm 1 and the second connecting arm 2 by an external force acting on the locking member 4, that is, the first connecting arm 1 and the second connecting arm 2 cannot rotate relative to each other, so as to realize the relative fixation of the two arms.

[0050] The hydraulic push rod 5 is located in the connecting sleeve 22, and the hydraulic push rod 5 can push the hydraulic oil in the oil way by an external force, so that the ball head push rod 3 pushes the ball head to lock the ball head.

[0051] When the photographic equipment connecting device is used, it is divided into a ball head adjusting step and an arm adjusting step.

[0052] In the ball head adjusting step, the photographic equipment is first installed and fixed on the ball head, and then the ball head is adjusted and rotated to an appropriate position, and then the hydraulic push rod 5 is driven to push the hydraulic oil in the first oil way 13 and / or the second oil way 23, so that the hydraulic oil in the oil way drives the ball head push rod 3 to abut against the ball head and press the ball head against the ball head seat, at this time, the ball head is in a pressed state and cannot rotate relative to the ball head seat. When it is necessary to adjust the ball head again or to unlock the ball head, the hydraulic push rod 5 is driven in the opposite direction to release the pressure, so that the ball head push rod 3 no longer presses the ball head against the ball head seat, and at this time, the ball head can rotate relative to the ball head seat.

[0053] In the arm adjusting step, the first connecting arm 1 and the second connecting arm 2 which can rotate relative to each other are adjusted to an appropriate angle in the adjusting state, and then the relative position of the first connecting arm 1 and the second connecting arm 2 is locked by driving the locking member 4, so that the two connecting arms are fixed relative to the attitude angle of the photographic equipment.

[0054] The above two adjusting steps can be independent of each other, and the effect is that:

[0055] Firstly, the operation flexibility is high, the locking and unlocking of the ball head and the two connecting arms can be adjusted respectively, and the use method is more rich.

[0056] Secondly, the safety is good. The existing photographic equipment connecting device will also unlock the ball head when unlocking the two connecting arms, and the photographic equipment needs to be disassembled before unlocking, otherwise the ball head will be unlocked when the arm is unlocked, and the photographic equipment will be tilted due to the weight of the photographic equipment. The photographic equipment connecting device can be adjusted step by step, and the ball head will not be unlocked when the two connecting arms of the present application are unlocked, and the photographic equipment is supported.

[0057] The present application adopts a hydraulic system composed of the first oil way 13, the second oil way 23, the oil hole 220 and the hydraulic push rod 5 to control the locking and unlocking of the ball head, and the effect is that:

[0058] One of them is the thrust amplification of the hydraulic system and the force transmission effect. The thrust amplification refers to the principle of using the incompressibility of liquid and the principle of equal pressure through the hydraulic oil circuit. The equation P = F / S = F1 / S1 = F2 / S2 is established, where F is the external force received by the ball head locking part 4, S is the cross-sectional area of the ball head locking part 432 in contact with the hydraulic oil, the cross-sectional area of the ball head push rod 3 provided on each connecting arm in contact with the hydraulic oil is S1 and S2 respectively, S1 = S2, F1 and F2 are the locking forces of the two ball head push rods 3 on the ball head.

[0059] It can be seen that the locking force F1 = F2 = F*S1 / S = F*S2 / S applied to the ball head is amplified S1 / S times through the hydraulic oil circuit to output the locking force.

[0060] Second, the response speed is fast. The liquid force transmission has no mechanical impact and responds quickly.

[0061] Third, the control precision is high. The pressure can be accurately controlled, and higher precision displacement control can be achieved by controlling the advancement of the hydraulic push rod 5.

[0062] Fourth, the force transmission is good. Compared with the existing photographic equipment connecting device which transmits through a mechanical structure, the hydraulic system transmission adopted by the present application has better transmission than the mechanical mechanism transmission.

[0063] The present application sets up the first connecting arm 1 and the second connecting arm 2 which can rotate relative to each other, sets up the ball head seat on each connecting arm, sets up the ball head which can rotate relative to the ball head seat in the ball head seat, and connects the photographic equipment through the ball head. At the same time, the first oil way 13 and the second oil way 23 connected with each ball head seat are set up, and the hydraulic oil in the first oil way 13 and / or the second oil way 23 is driven to push the ball head push rod 3, so that the ball head push rod 3 presses the ball head to the ball head seat to realize the locking of the ball head, so as to realize the fixing of the photographic equipment connected with the ball head. The independent locking of the ball head and the two connecting arms can be realized respectively, that is, the angle adjustment of the two connecting arms and the angle adjustment of the photographic equipment relative to the connecting arm can be carried out respectively.

[0064] Compared with the related technical scheme which can only lock the ball head and the two connecting arms at the same time, the step-by-step locking mechanism of the present application greatly optimizes the flexibility of fine adjustment and positioning, so that the accurate control of the photographic angle and the field of view is possible, and it is more suitable for the precise adjustment requirement in the photographic activity.

[0065] Referring to FIG. 4, in some embodiments, the ball head push rod 3 proposed by the present application comprises:

[0066] The first ball head push rod 31 is located in the first ball head seat 11, and the first ball head push rod 31 is located between the first ball head 14 and the inlet of the first oil way 13.

[0067] The second ball head push rod 32 is located in the second ball head seat 21, and the second ball head push rod 32 is located between the second ball head 24 and the inlet of the second oil path 23.

[0068] In this embodiment, the ball head push rod 3 includes a first ball head push rod 31 and a second ball head push rod 32. The first ball head push rod 31 is located in the first ball head seat 11 and is specifically arranged between the first ball head 14 and the inlet of the first oil path 13. The second ball head push rod 32 is located in the second ball head seat 21 and is specifically arranged between the second ball head 24 and the inlet of the second oil path 23.

[0069] When the hydraulic oil is pushed by the hydraulic push rod 5, the hydraulic oil is pushed in each oil path towards the two ball head push rods 3, the two ball head push rods 3 are pushed, and each ball head push rod 3 in turn presses the ball head adjacent thereto, so that the ball head is locked in the ball head seat, thereby realizing the relative fixed connection between the connecting members. By using the pressure of the hydraulic oil, the pressure is indirectly transmitted to the ball head through the ball head push rod 3, the ball head is in abutment with the ball head seat, and the ball head is locked.

[0070] The above-mentioned structure of the ball head push rod 3 improves the tightness between the ball head and the ball head seat, enhances the connection strength and stability, and makes the photographic equipment more stable and reliable during use.

[0071] And the hydraulic transmission is adopted, the response speed is fast, the quick locking and releasing can be realized, and the flexibility and efficiency of the photographic equipment adjustment are improved.

[0072] Referring to FIGS. 4 and 5, in some embodiments, the first ball head push rod 31 proposed in the embodiment of the application includes:

[0073] The first push rod seat 311 is connected with the port of the first oil path 13, and the middle part of the first push rod seat 311 is provided with a first oil injection hole 3110 for injecting oil into the first oil path 13;

[0074] The first floating member 312 is in abutment with the first ball head 14 at one end and is aligned with the first oil injection hole 3110 at the other end, and the first floating member 312 can ascend and descend along the side wall of the first push rod seat 311;

[0075] The second ball head push rod 32 includes:

[0076] The second push rod seat 321 is connected with the port of the second oil path 23, and the middle part of the second push rod seat 321 is provided with a second oil injection hole 3210 for injecting oil into the second oil path 23;

[0077] The second floating member 322 is in abutment with the second ball head 24 at one end and is aligned with the second oil injection hole 3210 at the other end, and the second floating member 322 can ascend and descend along the side wall of the second push rod seat 321.

[0078] In this embodiment, the first push rod seat 311 and the second push rod seat 321 are connected with the ports of the respective oil paths, and the middle parts of both are provided with oil injection holes for injecting oil into the oil paths. The push rod seat serves as a support and hydraulic oil distribution structure, and can be used to introduce hydraulic oil into the oil paths, so as to realize effective introduction and use of hydraulic oil.

[0079] The first floating member 312 and the second floating member 322 are respectively abutted against the ball head at one end and aligned with the oil injection hole at the other end. The hydraulic oil is lifted along the side wall of the push rod seat under the pressure of the hydraulic push rod 5, so as to push the ball head.

[0080] The working principle is to use the hydraulic oil to transmit pressure to drive the floating member to abut or move away from the ball head, so as to realize locking and releasing of the ball head.

[0081] In some embodiments, the process of filling hydraulic oil is as follows: one of the first oil injection hole 3110 and the second oil injection hole 3210 is used as an oil inlet, and the other is used as an oil outlet. The hydraulic oil is filled through the oil inlet, and the hydraulic oil passes through the first oil path 13, the oil hole 220, and the second oil path 23, until the hydraulic oil is almost overflowing from the oil outlet. Then, the oil inlet and the oil outlet are closed in sequence, so that the oil path is filled with hydraulic oil, forming an effective hydraulic system.

[0082] In some embodiments, the ball head seat can be composed of an upper half shell and a lower half shell. The lower half shell is sleeved on the outer wall of the first connecting arm 1, and the upper half shell is threadedly connected with the lower half shell. First, the lower half shell is installed on the connecting arm, then the push rod seat is installed on the connecting arm, then the ball head push rod is installed on the push rod seat, then the ball head is placed on the ball head push rod, and then the upper half shell is sleeved on the ball head and combined with the lower half shell through the threaded structure for use. The actual structure can be designed by those skilled in the art according to actual needs.

[0083] Referring to FIGS. 2 and 4, in some embodiments, the connecting sleeve 22 is provided separately from the first connecting arm 1. The connecting sleeve 22 includes a first connecting segment 221 for connecting with the first connecting hole 12 and a second connecting segment 222 passing through the first connecting hole 12.

[0084] In this embodiment, the first connecting hole 12 is sleeved on the first connecting segment 221, and the two can rotate relative to each other. The connecting sleeve 22 is provided separately from the first connecting arm 1. The connecting sleeve 22 is used as an independent component and is separately manufactured and installed. Its effect is that it is convenient to replace and has a wider range of applications, and different connecting sleeves 22 can be used with the first connecting arm 1 by replacement. This makes the connecting structure modular and has good universality.

[0085] In some embodiments, the connecting sleeve 22 can be integrally formed with the first connecting arm 1 as one piece. Such design can make the mechanical structure more integral and stable, and more durable than the split design. Since the connecting arm usually needs to bear certain load, such as the weight of the camera phone and other photographic equipment, the integral design has better load-bearing performance and is more durable than the split design. Those skilled in the art can design according to actual needs, which is not limited herein.

[0086] Referring to FIG. 2, in some embodiments, the free end of the second connecting section 222 is provided with a thread for connecting with the locking piece 4.

[0087] In the present embodiment, the locking piece 4 can be provided with a threaded hole, and the free end of the second connecting section 222 is provided with an external thread. The rotation of the locking piece 4 and the thread of the second connecting section 222 can drive the locking piece 4 to push the first connecting arm 1 to move towards the second connecting arm 2 until they abut and cannot rotate relative to each other. At this time, the second connecting arm 2 is locked with the first connecting arm 1. The locking piece 4 uses the thread transmission with the second connecting section 222 to convert the rotary motion into linear propulsion to lock or unlock the relative rotation relationship between the two connecting arms. The thread of the second connecting section 222 and the thread of the locking piece 4 realize the transmission of the thrust between the threads, and the first connecting arm 1 is driven by the locking piece 4 to abut with the first connecting arm 1 to realize the locking. After adjusting the relative angle of the two connecting arms, the relative position of the two connecting arms can be fixed by driving the locking piece 4, that is, the two connecting arms are locked. The present application achieves a simple and effective locking effect of the two connecting arms through the above-mentioned arrangement.

[0088] Referring to FIG. 2, in some embodiments, the side wall of the second connecting section 222 is provided with at least one oil groove 25, and each oil groove 25 is provided with a plurality of oil holes 220.

[0089] In the embodiment, the first connecting hole 12 is a through hole formed in the side wall of the first connecting arm 1, the first connecting section 221 of the connecting sleeve 22 extends into the through hole and is rotationally connected with the through hole, at least one oil groove 25 is concavely arranged at the connecting position of the outer peripheral wall of the connecting sleeve 22 and the inner wall of the through hole, the oil groove 25 is an annular oil groove 25 formed by the peripheral wall surrounding the first connecting section 221, the bottom wall of the annular oil groove 25 is provided with an oil hole 220, the first oil path 13 is communicated with the second oil path 23 through the oil hole 220, and the oil groove 25 is used for, when one end of the hydraulic push rod 5 pushes the hydraulic oil to move to the first oil path 13, the hydraulic oil under pressure first fills into the oil groove 25 through the oil hole 220, and then moves to the second oil cavity 132 after the oil groove 25 is filled, when the first connecting arm 1 rotates relative to the second connecting arm 2, because the rotation angle can be 360°, in order to ensure that the hydraulic oil in the first oil path 13 and the second oil path 23 is still communicated under the condition of rotation, the annular oil groove 25 is designed as an oil cavity transition structure during rotation, and the annular oil groove 25 can be used to store and transition oil when the two connecting arms move relative to each other. The oil hole 220 is used for realizing effective communication between the first oil path 13 and the second oil path 23 and is a necessary passage for hydraulic oil flow, the oil hole 220 penetrating the bottom wall of the oil groove 25 has two ports, and the two ports are arranged to make that, when the hydraulic oil flows out from one of the two ports and gradually fills the annular oil groove 25, the air in the annular oil groove 25 can be completely discharged, which is beneficial to the use of the hydraulic system and makes the force transmission better.

[0090] The scheme can support relative rotation of the two connecting arms and can also use the hydraulic push rod 5 to lock the ball head, so that the locking effect of the ball head is not affected by the relative rotation of the two connecting arms, and the adjustment range is expanded.

[0091] In some embodiments, two sealing grooves are further formed at the connecting position of the outer peripheral wall of the first connecting section 221 of the connecting sleeve 22 and the inner wall of the through hole, the two sealing grooves are arranged on the two sides of the oil groove 25, a sealing element is arranged in the sealing groove, the sealing element abuts against the inner wall of the through hole of the second connecting arm 2, and the sealing effect of the hydraulic oil in the oil groove 25 can be realized. When the first connecting arm 1 rotates relative to the second connecting arm 2, the sealing element is in contact and friction with the wall of the through hole, which can provide a certain rotation effect and realize the functions of closing and sealing the annular oil groove 25. The sealing element is tightly combined with the inner wall of the connecting arm, and a sealing ring, a sealing gasket or other commonly used elements that can fully play the sealing role are generally selected to prevent the hydraulic oil from leaking from the two sides of the annular oil groove 25. The sealing groove is a space for accommodating and positioning the sealing element, so as to ensure that the sealing element correctly plays the sealing function, the oil groove 25 is completely closed by the sealing element, and the leakage of the hydraulic oil is prevented.

[0092] The application can effectively prevent hydraulic oil leakage by setting the sealing groove and the sealing member, so that the hydraulic oil in the oil tank 25 is completely sealed by the sealing member. The first connecting arm 1 can also be effectively sealed when rotating relative to the second connecting arm 2, further improving the sealing effect. Moreover, the structure is simple and easy to install and disassemble.

[0093] Referring to FIGS. 1 and 4, in some embodiments, the locking member 4 includes a first locking member 41 and a second locking member 42, and the second connecting section 222 includes a first threaded section 2221 and a second threaded section 2222. The first threaded section 2221 passes through the first connecting hole 12 and is connected with the first locking member 41, which is used to lock the first connecting arm 1 and the second connecting arm 2. The second threaded section 2222 passes through the first locking member 41 and is connected with the second locking member 42.

[0094] In the embodiment, the first locking member 41 is connected with the first threaded section 2221 and can be used to lock the two connecting arms. The relative locking of the two connecting arms is achieved by the friction generated by the contact of the contact surfaces of the two connecting arms. The relative fixation of the two arms can be simply and effectively achieved. The second locking member 42 is connected with the second threaded section 2222. One end of the hydraulic push rod 5 extends into the connecting sleeve 22, and the other end abuts against the second locking member 42. The second locking member 42 can push the hydraulic push rod 5 to move. The second locking member 42 drives the hydraulic push rod 5 to move linearly through the threaded transmission, so that the advancing direction and distance of the hydraulic push rod 5 can be accurately controlled.

[0095] The second locking member 42 is provided with a threaded hole. The first threaded section 2221 of the second connecting section 222 matches the threaded hole of the second locking member 42. The first threaded section 2221 provides a relative movement track between the second locking member 42. The inner wall of the threaded hole of the second locking member 42 is provided with a thread that matches the first threaded section 2221, so as to form a threaded transmission mechanism therebetween. When the second locking member 42 is driven to rotate, the second locking member 42 pushes the hydraulic push rod 5. The hydraulic push rod 5 compresses or depressurizes the hydraulic oil in each oil passage, so as to drive the ball head push rod 3 to act on the ball head to lock or unlock the ball head.

[0096] In some embodiments, the diameter of the threaded hole of the first locking member 41 that matches the first threaded section 2221 is greater than the outer peripheral diameter of the second locking member 42, so that the second locking member 42 can rotate relatively in the first locking member 41 when driving the hydraulic push rod 5, as shown in FIG. 4.

[0097] In some embodiments, as an alternative to the above scheme, a threaded hole can be formed at the port of the second threaded section 2222, an inner thread is formed at the end of the hydraulic push rod 5 extending into the connecting sleeve 22, the second locking member 42 is integrally arranged with the hydraulic push rod 5, when the second locking member 42 is rotated by external force, the hydraulic push rod 5 cooperates with the inner thread at the port of the second threaded section 2222 of the connecting sleeve 22, so that the end of the hydraulic push rod 5 extending into the connecting sleeve 22 pushes the hydraulic oil, thereby pushing the ball head push rod 3 on each connecting arm by the hydraulic oil.

[0098] In some embodiments, the scheme of the present application can be achieved by forming a connecting threaded hole on the knob as shown in FIG. 2, the connecting threaded hole is in communication with the threaded hole of the second locking member 42, a fine adjustment member adapted to the connecting threaded hole is arranged in the connecting threaded hole, one end of the fine adjustment member extends into the second locking member 42 and abuts against the hydraulic push rod 5, and the other end can be adjusted by a cooperating tool, by adjusting the fine adjustment member, the initial pressure of the hydraulic oil in each oil passage by the hydraulic push rod 5 can be adjusted.

[0099] Referring to FIG. 4, in some embodiments, the photographic equipment connecting device proposed in the embodiments of the present application further comprises an elastic member 7, the port of the second threaded section 2222 is configured with an oil groove 2223 in communication with the second oil passage 23, the elastic member 7 is arranged in the oil groove 2223, one end of the hydraulic push rod 5 extends into the oil groove 2223 and abuts against the elastic member 7, and the other end abuts against the second locking member 42.

[0100] In the present embodiment, the elastic member 7 is arranged in the oil groove 2223 and in contact with one end of the hydraulic push rod 5, when the hydraulic push rod 5 moves, one end of the hydraulic push rod 5 abuts against and compresses the elastic member 7 to store energy, at this time, the elastic member 7 plays a buffering role, which can protect the hydraulic push rod 5 and prevent the hydraulic push rod 5 from being damaged due to excessive penetration, thereby prolonging the service life.

[0101] The oil groove 2223 is used for accommodating and mounting the elastic member 7, the elastic member 7 is arranged in the oil groove 2223, one end of the elastic member 7 abuts against the hydraulic push rod 5, and the other end abuts against the bottom wall of the oil groove 2223, the elastic member 7 is made of a spring or a rubber or other elastic material element, when the hydraulic push rod 5 performs the ball head locking step, the hydraulic push rod 5 pushes the elastic member 7 while pushing the hydraulic oil by driving the second locking member 42, so that the elastic member 7 is deformed, when the hydraulic push rod 5 moves reversely to perform the ball head unlocking step, the elastic member 7 is released to provide restoring power to drive the hydraulic push rod 5 to move, which is helpful for the quick reset of the hydraulic push rod 5.

[0102] The elastic member 7 is arranged to achieve the following effects:

[0103] Firstly, the system motion sensitivity and response speed are improved. The energy storage and release of the elastic member 7 can provide additional restoring force, which reduces the inertia of the movement of the hydraulic push rod 5 and the screw rod, and is conducive to improving the motion sensitivity.

[0104] Secondly, the elastic member 7 can provide a buffering effect to reduce impact. The elastic member 7 can absorb and release energy, and thus can provide a buffering and damping effect to the components, and reduce mechanical impact during locking.

[0105] In the embodiments, the elastic member 7 has the functions of elastic energy storage and release, and thus can provide a buffering and auxiliary effect to the movement of the hydraulic push rod 5, and improve the sensitivity and recovery performance of the hydraulic system.

[0106] Referring to FIG. 4, in some embodiments, the first oil path 13 includes a first oil cavity 131 and a second oil cavity 132 arranged along the axis of the first connecting arm 1, and the diameter of the first oil cavity 131 is greater than the diameter of the second oil cavity 132. The second oil path 23 has the same structure as the first oil path 13.

[0107] In the embodiments, the first oil cavity 131 and the second oil cavity 132 are arranged along the axis of the first connecting arm 1, the first oil cavity 131 connects the second oil cavity 132 and the ball head push rod 3, specifically, the first oil cavity 131 connects the floating member of the ball head push rod 3, and the second oil cavity 132 is arranged between the first oil cavity 131 and the connecting sleeve 22. The cross-sectional diameter of the first oil cavity 131 is greater than the cross-sectional diameter of the second oil cavity 132, which is a design of thrust amplification. The thrust amplification refers to that the hydraulic system uses the principle that the liquid is not compressible and the principle that the pressure is equal at each position of the hydraulic oil path to establish the equation P=F / S=F1 / S1=F2 / S2, where F is the external force received by the ball head locking member 4, S is the cross-sectional area of the ball head locking member 432 in contact with the hydraulic oil, the cross-sectional areas of the floating member in contact with the hydraulic oil are S1 and S2, S1=S2, and F1 and F2 are the locking forces of the two ball head push rods 3 on the ball head.

[0108] It can be seen that the locking force F1=F2=F*S1 / S=F*S2 / S applied to the ball head is amplified by S1 / S times through the hydraulic oil path to output the locking force. Therefore, the cross-sectional diameter of the first oil cavity 131 is greater than that of the second oil cavity 132, so that the thrust for pushing the floating member is increased compared with the force applied to the hydraulic push rod 5.

[0109] Referring to FIGS. 2 and 4, in some embodiments, the photographic equipment connecting device also includes a toothed disc 6 between the first connecting arm 1 and the second connecting arm 2.

[0110] In the embodiment, the first connecting arm 1 and the second connecting arm 2 are respectively provided with locking tooth plates 6, and the tooth surfaces of the two locking tooth plates 6 are opposite. When it is needed to lock the two connecting arms so that the two connecting arms cannot rotate relative to each other, the first locking member 41 is driven to drive the first connecting arm 1 to move towards the second connecting arm 2, so that the tooth surfaces of the two locking tooth plates 6 on the two connecting arms are pushed towards each other and meshed with each other. After the tooth surfaces of the two locking tooth plates 6 are meshed, the relative locking of the first connecting arm 1 and the second connecting arm 2 is realized. The two locking tooth plates 6 are provided to realize the self-locking function, and the mechanical mode is further used to realize the reliable locking of the arm. Compared with directly driving the two connecting arms to directly abut and lock through the friction force of the contact surface, the locking effect of the tooth plate 6 is better.

[0111] In some embodiments, the locking tooth plate 6 can also be replaced by a friction damping piece. The second connecting arm 2 and the first connecting arm 1 press the friction damping piece to make it difficult to rotate between the two, and the friction damping piece increases the contact friction force between the two. Those skilled in the art can design according to actual needs, and details are not described here.

[0112] The above only describes some or preferred embodiments of the present application, and neither the text nor the drawings can limit the scope of protection of the present application. Any equivalent structural transformation using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the scope of protection of the present application.

Claims

1. A photographic equipment connection device, characterized in that: include: a first connecting arm, wherein one end of the first connecting arm is provided with a first ball seat, and the other end is provided with a first connecting hole, the first connecting hole being a through hole, and a first oil passage being constructed between the first ball seat and the first connecting hole; a second connecting arm, wherein one end of the second connecting arm is provided with a second ball seat, and the other end is provided with a connecting sleeve that can pass through the first connecting hole, the connecting sleeve is arranged at an angle with the body of the second connecting arm, a second oil circuit is constructed between the second ball seat and the connecting sleeve, and the connecting sleeve is provided with at least one oil hole for connecting the first oil circuit with the second oil circuit; Two ball head push rods are respectively located in the first ball head seat and the second ball head seat, and abut against the first ball head located in the first ball head seat and the second ball head located in the second ball head seat; a locking member connected to the connecting sleeve and used to lock the first connecting arm and the second connecting arm; The hydraulic push rod is located in the connecting sleeve and is used to push the hydraulic oil in the first oil circuit and / or the second oil circuit toward the ball head push rod so that the ball head push rod presses against the ball head.

2. The photographic equipment connection device according to claim 1, characterized in that: The two ball-end push rods include: a first ball head push rod, located in the first ball head seat, and the first ball head push rod is located between the first ball head and the inlet of the first oil circuit; The second ball head push rod is located in the second ball head seat, and the second ball head push rod is located between the second ball head and the inlet of the second oil circuit.

3. The photographic equipment connection device according to claim 1, wherein: The first ball-head putter comprises: a first push rod seat connected to a port of the first oil circuit, wherein a first oil filling hole for filling oil into the first oil circuit is provided in a middle portion of the first push rod seat; a first floating member, one end of the first floating member abutting against the first ball head and the other end aligned with the first oil filling hole, the first floating member being movable up and down along the side wall of the first push rod seat; The second ball head putter comprises: a second push rod seat, the second push rod seat being connected to the port of the second oil circuit, and a second oil filling hole being provided in the middle portion of the second push rod seat for filling oil into the second oil circuit; A second floating member, one end of which abuts against the second ball head and the other end is aligned with the second oil filling hole, and the second floating member can be lifted and lowered along the side wall of the second push rod seat.

4. The photographic equipment connection device according to claim 1, wherein: The connecting sleeve is separately provided from the first connecting arm, and the connecting sleeve includes a first connecting section for connecting with the first connecting hole and a second connecting section passing through the first connecting hole.

5. The photographic equipment connection device according to claim 4, characterized in that: The free end of the second connecting section is provided with a thread for connecting with the locking member.

6. The photographic equipment connection device according to claim 5, characterized in that: The side wall of the second connecting section is provided with at least one oil groove, and each oil groove is provided with a plurality of the oil holes.

7. The photographic equipment connection device according to claim 5, characterized in that: The locking member includes a first locking member and a second locking member, the second connecting section includes a first threaded section and a second threaded section, the first threaded section passes through the first connecting hole and is connected to the first locking member for locking the first connecting arm and the second connecting arm; the second threaded section passes through the first locking member and is connected to the second locking member.

8. The photographic equipment connection device according to claim 7, wherein: The photographic equipment connecting device also includes an elastic member, and the port of the second threaded section is constructed with an oil noodle that is connected to the second oil circuit. The elastic member is arranged on the oil noodle, and one end of the hydraulic push rod extends into the oil noodle to abut against the elastic member, and the other end abuts against the second locking member.

9. The photographic equipment connecting device according to any one of claims 1 to 8, characterized in that: The first oil circuit includes a first oil chamber and a second oil chamber arranged along the axis of the first connecting arm. The diameter of the first oil chamber is larger than the diameter of the second oil chamber. The structure of the second oil circuit is consistent with that of the first oil circuit.

10. The photographic equipment connection device according to claim 9, wherein: The photographic equipment connecting device further includes a gear wheel located between the first connecting arm and the second connecting arm.

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