Multifunctional camera shooting and lighting device

By using injection and compression technology of liquid sealing media in the housing assembly and back cover assembly of the multi-functional camera and lighting device, the problem of poor waterproofing effect of existing devices is solved, and higher waterproofing performance and service life are achieved.

CN119148449APending Publication Date: 2024-12-17SHENZHEN OCEAN KING RAILWAY LIGHTING TECH CO LTD +11
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Patent Information

Application Number
CN202411522464.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-29
Publication Date
2024-12-17

AI Technical Summary

Technical Problem

The existing multi-functional camera lighting device has poor waterproofing effect, which makes it easy for rainwater to enter and affects use.

Method used

A liquid sealing medium is used to inject and compress it into the sealing groove between the housing assembly and the rear cover assembly to form a sealing effect and ensure the waterproof performance of the battery compartment.

Benefits of technology

It significantly improves the waterproof sealing effect of the device, avoids moisture entering, and thus extends the service life.

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Abstract

The invention provides a multifunctional camera shooting and lighting device, and relates to the technical field of camera shooting and lighting devices.The multifunctional camera shooting and lighting device comprises a shell assembly and a rear cover assembly, and the shell assembly is provided with a containing groove used for containing a power source assembly; a containing groove is formed in the shell assembly, a sealing groove is formed in the position, located on the outer side of a groove opening of the containing groove, of the shell assembly in the circumferential direction, a liquid sealing medium is injected into the sealing groove, the liquid sealing medium protrudes out of the sealing groove, and the rear cover assembly is detachably arranged on the sealing groove in a covering mode and compresses the liquid sealing medium; the shell assembly and the rear cover assembly are sealed in the mode that the liquid sealing medium is injected and compressed, the remarkable waterproof sealing effect is achieved, the situation that water enters the shell assembly to damage the device can be effectively avoided, and the service life of the device is guaranteed.
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Description

Technical Field

[0001] The present invention relates to the technical field of imaging lighting devices, and in particular to a multifunctional imaging lighting device. Background Art

[0002] Multifunctional video and lighting devices are usually used in the inspection and maintenance of railway transportation, engineering, power supply, and electric lines.

[0003] Traditional lighting lamps with camera functions are usually complex in structure and bulky in size, making them inconvenient to use. To address this problem, a portable multifunctional camera lighting device has emerged. However, current portable multifunctional camera lighting devices usually use traditional sealing rings to seal their battery compartments, which have poor waterproof effects and can easily allow rainwater to enter, causing damage to the device and affecting its use. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional video camera lighting device to solve the technical problem of poor waterproof effect of the existing multifunctional video camera lighting device in the prior art; the preferred technical scheme among the many technical schemes provided by the present invention can produce many technical effects; see the detailed description below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a multifunctional video camera lighting device, comprising a shell assembly and a back cover assembly, wherein: the shell assembly is provided with a receiving groove for accommodating a power supply assembly, the shell assembly is provided with a sealing groove circumferentially outside the notch of the receiving groove, a liquid sealing medium is injected into the sealing groove, the liquid sealing medium protrudes from the sealing groove, and the back cover assembly is detachably covered on the sealing groove and compresses the liquid sealing medium.

[0007] Preferably, the shell assembly includes a front shell assembly and a rear shell assembly, and the multifunctional imaging and lighting device includes an imaging and lighting assembly, a control assembly and a power supply assembly, wherein: the front shell assembly and the rear shell assembly are detachably connected and enclose the accommodating cavity, and the imaging and lighting assembly and the control assembly are arranged in the accommodating cavity; the accommodating groove is opened on the side of the rear shell assembly away from the front shell assembly, and the power supply assembly includes a main power supply and a secondary power supply, the main power supply is arranged in the accommodating groove, and the secondary power supply is arranged in the accommodating cavity, and is used to power the multifunctional imaging and lighting device when the main power supply is replaced.

[0008] Preferably, the control component includes a main control board, on which a fall saving module, a motion detection module and a Beidou positioning module are integrated.

[0009] Preferably, the control component includes a sub-board bracket and a sub-control board, wherein: the sub-board bracket is arranged on the main control board; the sub-control board is arranged on the sub-board bracket, and an infrared night vision module is integrated on the sub-control board.

[0010] Preferably, the video lighting assembly includes a camera, a speaker and a microphone, wherein: the camera is arranged on the main control panel, and a first clearance hole is arranged on the sub-panel bracket at a position corresponding to the camera, and the first clearance hole passes through the rear shell assembly; a first fixing groove is arranged on the front shell assembly and located in the accommodating cavity, and the speaker is installed in the first fixing groove; a second fixing groove is arranged on the rear shell assembly and located in the accommodating cavity, and the microphone is installed in the second fixing groove.

[0011] Preferably, the camera lighting assembly includes a lamp bead and a lens, wherein: the lamp bead is arranged on the auxiliary control board; the lens cover is arranged on the outside of the lamp bead, and a second clearance hole is arranged on the rear shell assembly at a position corresponding to the lens.

[0012] Preferably, a first mounting groove is formed on a side of the rear shell assembly away from the front shell assembly, the first mounting groove corresponds to the camera lighting assembly, and a transparent sheet is disposed in the first mounting groove.

[0013] Preferably, the control component includes a button component and an indication component, wherein: the button component is arranged on the side wall of the front shell component; the indication component includes a laser head and a light guide, and a third fixing groove is provided on the rear shell component, the laser head is arranged in the third fixing groove for direction and function indication, and the light guide is arranged on the outer wall of the rear shell component for indicating light conduction.

[0014] Preferably, the multifunctional camera lighting device comprises a screen assembly, a second mounting groove is arranged on the side of the front shell assembly away from the rear shell assembly, and the screen assembly is arranged in the second mounting groove.

[0015] Preferably, the multifunctional video recording and lighting device includes a back clamp assembly, and the back clamp assembly includes a back clamp base, a first back clamp component and a second back clamp component, wherein: a first plug-in portion is provided on the front shell assembly, and a second plug-in portion is provided on the back clamp base, and the first plug-in portion is plug-connected to the second plug-in portion; the mounting end of the first back clamp component is rotatably provided on the back clamp base; the second back clamp component is provided on the side of the first back clamp component away from the front shell assembly, the fixed end of the second back clamp component is rotatably connected to the first back clamp component, the movable end of the second back clamp component is provided with a first positioning plug-in portion, and a second positioning plug-in portion is provided on the first back clamp component at a position corresponding to the first positioning plug-in portion, and the first positioning plug-in portion can be plugged with the second positioning plug-in portion.

[0016] The multifunctional camera lighting device provided by the present invention has at least the following beneficial effects:

[0017] The multifunctional camera lighting device comprises a shell assembly and a rear cover assembly, which are the main parts of the multifunctional camera lighting device and are used for installing and protecting its various structural components and electrical components.

[0018] The shell assembly is provided with a receiving groove for accommodating the power supply assembly, and the shell assembly is provided with a sealing groove circumferentially outside the notch of the receiving groove, and a liquid sealing medium is injected into the sealing groove, and the liquid sealing medium protrudes out of the sealing groove. The rear cover assembly is detachably covered on the sealing groove and compresses the liquid sealing medium. When installing the battery assembly, the battery assembly is placed in the receiving groove, and then the liquid sealing medium is injected into the sealing groove. During this process, it is necessary to ensure that the liquid sealing medium protrudes out of the sealing groove. After the injection is completed, the rear cover assembly is installed, and the rear cover assembly squeezes the liquid sealing medium and compresses it.

[0019] The present invention seals the housing assembly and the rear cover assembly by injecting a liquid sealing medium and compressing the medium, which has a significant waterproof sealing effect, can effectively prevent damage to the device caused by water entering the housing assembly, and ensure the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention from one viewing angle;

[0022] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0023] Figure 3 It is a schematic diagram of assembling the housing assembly and the rear cover assembly of the present invention;

[0024] Figure 4 It is a schematic diagram of assembling the rear cover assembly, the transparent sheet and the rear shell assembly of the present invention;

[0025] Figure 5 It is a partial cross-sectional schematic diagram of the present invention;

[0026] Figure 6It is a structural schematic diagram of the camera lighting assembly, the control assembly and the front housing assembly of the present invention;

[0027] Figure 7 It is a schematic diagram of the assembly of the main control panel and the rear control panel of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the rear housing assembly of the present invention;

[0029] Fig. 9 It is a schematic diagram of assembling the screen assembly and the back clip assembly of the present invention.

[0030] Reference numerals

[0031] 1. Shell assembly; 11. Front shell assembly; 111. First fixing groove; 112. Second mounting groove; 113. First plug-in portion; 12. Back shell assembly; 121. Accommodating groove; 122. Second fixing groove; 123. First mounting groove; 124. Third fixing groove; 125. Sealing groove; 13. Accommodating cavity; 14. Transparent sheet; 2. Back cover assembly; 3. Liquid sealing medium; 4. Camera lighting assembly; 41. Camera; 42. Speaker; 43. Microphone Microphone; 44, lamp beads; 45, lens; 5, control assembly; 51, main control board; 52, sub-board bracket; 53, sub-control board; 54, button assembly; 55, laser head; 56, light guide; 6, power assembly; 61, main power supply; 7, screen assembly; 8, back clip assembly; 81, back clip base; 811, second plug-in part; 82, first back clip piece; 821, second positioning plug-in part; 83, second back clip piece; 831, first positioning plug-in part. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] The present invention provides a multifunctional imaging lighting device, referring to Figures 1 to 5 As shown, the multifunctional imaging and lighting device includes a shell assembly 1 and a back cover assembly 2.

[0035] A accommodating groove 121 is provided on the shell component 1, and the accommodating groove 121 matches the shape of the main power supply 61 of the power supply component 6. The accommodating groove 121 is used to accommodate the main power supply 61. A sealing groove 125 is circumferentially arranged on the shell component 1 outside the notch of the accommodating groove 121. Liquid sealing medium 3 is injected into the sealing groove 125. The liquid sealing medium 3 can be liquid silicone. The rear cover component 2 is detachably covered on the sealing groove 125.

[0036] When installing the main power supply 61, install the main power supply 61 in the accommodating groove 121, and then inject the liquid sealing medium 3 into the sealing groove 125. During the injection process, it is necessary to ensure that the liquid sealing medium 3 protrudes from the sealing groove 125, that is, the height of the liquid sealing medium 3 after injection is higher than the depth of the sealing groove 125. Then install the rear cover assembly 2 so that the rear cover assembly 2 covers the sealing groove 125. In this way, the rear cover assembly 2 squeezes the liquid sealing medium 3 to compress the liquid sealing medium 3.

[0037] In the above process, the sealing between the shell assembly 1 and the back cover assembly 2 is completed by injecting liquid sealing medium and compressing it, so that the accommodating groove 121 can form a completely closed space, thereby effectively improving its waterproof effect, preventing moisture from entering and causing damage to the device, and effectively ensuring the service life of the device.

[0038] Embodiment 2:

[0039] Example 2 is based on Example 1:

[0040] like Figures 1 to 9 As shown, the housing assembly 1 includes a front housing assembly 11 and a rear housing assembly 12 , and the multifunctional imaging and lighting device includes an imaging and lighting assembly 4 , a control assembly 5 and a power supply assembly 6 .

[0041] The front shell assembly 11 and the rear shell assembly 12 are detachably connected by threaded fasteners, and the front shell assembly 11 and the rear shell assembly 12 form an accommodating cavity 13. The camera lighting assembly 4 and the control assembly 5 are arranged in the accommodating cavity 13. The front shell assembly 11 and the rear shell assembly 12 serve as the main body of the device and are used to protect other structural components and electrical components.

[0042] The threaded fasteners exposed to the outside of the front shell assembly 11 and the rear shell assembly 12 are connected and are correspondingly provided with sealing plugs, which can improve the sealing effect and further ensure the waterproof effect on the one hand, and protect the corresponding threaded fasteners on the other hand.

[0043] The accommodating groove 121 is opened on the side of the rear shell component 12 away from the front shell component 11. The power supply component 6 includes a main power supply 61 and a secondary power supply. The main power supply 61 is arranged in the accommodating groove 121. The main power supply 61 provides power for the entire multifunctional camera lighting device. The secondary power supply is arranged in the accommodating cavity 13. The secondary power supply is a backup power supply and a temporary power supply. During the process of replacing the main power supply 61, the secondary power supply briefly provides power for the multifunctional camera lighting device, thereby realizing uninterrupted power supply replacement of the main power supply 61.

[0044] As an optional implementation, the control component 5 includes a main control board 51 , on which a fall saving module, a motion detection module and a Beidou positioning module are integrated.

[0045] When the existing multifunctional video and lighting device is impacted during the recording process, it will directly terminate and lose the content being recorded before the impact. At the same time, it does not support functions such as mobile detection and Beidou positioning.

[0046] The present invention uses the drop saving module to save the recording file in real time when the device accidentally drops during the recording process, thereby effectively preventing the defect of losing the recording content due to the drop; the mobile detection module can detect moving objects; and the Beidou positioning module can achieve accurate positioning.

[0047] As an optional embodiment, the control assembly 5 includes a sub-board bracket 52 and a sub-control board 53.

[0048] The auxiliary board bracket 52 is arranged on the main control board 51 ; the auxiliary control board 53 is arranged on the auxiliary board bracket 52 , and the auxiliary board bracket 52 is used for the stable installation and support of the auxiliary control board 53 .

[0049] The sub-control board 53 is integrated with an infrared night vision module, through which the night vision function can be turned on in dark scenes, which is convenient to use.

[0050] As an optional implementation, the camera lighting assembly 4 includes a camera 41 , a speaker 42 and a microphone 43 .

[0051] The camera 41 is set on the main control board 51, and a first clearance hole is set on the sub-board bracket 52 at the position corresponding to the camera 41. The first clearance hole penetrates the rear shell assembly 12, and the camera 41 passes through the first clearance hole. The camera 41 adopts a high-resolution camera and can realize the function of 2K recording.

[0052] A first fixing groove 111 is provided on the front shell assembly 11 in the accommodating cavity 13 , and the speaker 42 is adapted to the first fixing groove 111 . The speaker 42 is installed in the first fixing groove 111 . The speaker 42 can convert electrical signals into acoustic signals, thereby providing sound.

[0053] A second fixing groove 122 is provided on the rear shell assembly 12 in the accommodating cavity 13 , and the microphone 43 is adapted to the second fixing groove 122 . The microphone 43 is installed in the second fixing groove 122 , and the microphone 43 is used to collect ambient sound.

[0054] As an optional implementation, the camera lighting assembly 4 includes a lamp bead 44 and a lens 45 .

[0055] The lamp beads 44 are arranged on the auxiliary control board 53 , and the lamp beads 44 are light sources for lighting.

[0056] The lens 45 is covered on the outside of the lamp bead 44 . A second clearance hole is provided on the rear shell assembly 12 at a position corresponding to the lens 45 . The lens 45 passes through the second clearance hole. The lens 45 is used to convert the lighting effect of the lamp bead 44 .

[0057] As an optional embodiment, a first mounting groove 123 is provided on a side of the rear shell assembly 12 away from the front shell assembly 11. The first mounting groove 123 is located on one side of the accommodating groove 121. The first mounting groove 123 corresponds to the position of the camera lighting assembly 4. A transparent sheet 14 is provided in the first mounting groove 123. The transparent sheet 14 is used to protect internal parts and transmit light, and also has a sealing function to further improve the waterproof effect.

[0058] As an optional implementation, the control component 5 includes a button component 54 and an indication component.

[0059] The button assembly 54 uses an FPC button, which is arranged on the side wall of the front shell assembly 11. During use, quick control can be achieved by pressing the corresponding button.

[0060] The indicating component includes a laser head 55 and a light guide 56. A third fixing groove 124 is provided on the rear shell component 12. The laser head 55 is adapted to the third fixing groove 124. The laser head 55 is arranged in the third fixing groove 124. The laser head 55 provides direction indication for the multifunctional video and lighting device and can also be used as a partial function indication. The number of light guides 56 is set to be multiple. A groove is provided on the outer wall of the rear shell component 12 at a position corresponding to the light guide 56. The light guide 56 is installed in the corresponding groove. The light guide 56 is used for the transmission of indicating light.

[0061] As an optional implementation, the control component 5 further includes an antenna, which is disposed in the accommodating cavity 13 and is used to receive and transmit signals.

[0062] As an optional embodiment, the multifunctional video recording and lighting device includes a screen assembly 7 , and a second mounting groove 112 is provided on the side of the front shell assembly 11 away from the rear shell assembly 12 , and the screen assembly 7 is adapted to the second mounting groove 112 , and the screen assembly 7 is arranged in the second mounting groove 112 .

[0063] The screen component 7 adopts a human-computer interaction screen, which can intuitively display the operating status of the device, and also serves as a control component for control.

[0064] As an optional implementation, the multifunctional video camera lighting device includes a back clamp assembly 8 , and the back clamp assembly 8 includes a back clamp base 81 , a first back clamp component 82 and a second back clamp component 83 .

[0065] A first plug-in portion 113 is provided on the front shell assembly 11, and a second plug-in portion 811 is provided on the back clip base 81. The first plug-in portion 113 is provided as a plug-in slot, and the second plug-in portion 811 is provided as a plug-in seat matching the shape of the plug-in slot, and the plug-in seat is plug-connected to the plug-in slot. The plug-in structure is adopted to facilitate the disassembly and assembly of the back clip assembly 8.

[0066] The mounting end of the first back clamp component 82 is hingedly disposed on the back clamp base 81 , so that during use, the first back clamp component 82 and the second back clamp component 83 can rotate as a whole relative to the back clamp base 81 .

[0067] The second back clamp 83 is arranged on a side of the first back clamp 82 away from the front shell assembly 11, and the fixed end of the second back clamp 83 is hinged to the first back clamp 82. In this way, the second back clamp 83 and the first back clamp 82 cooperate with each other to achieve a clamping action, which is easy to carry.

[0068] The movable end of the second back clamp component 83 is provided with a first positioning plug-in portion 831, and the position of the first back clamp component 82 corresponding to the first positioning plug-in portion 831 is provided with a second positioning plug-in portion 821, the first positioning plug-in portion 831 is set as a positioning plug-in block, and the second positioning plug-in portion 821 is set as a positioning plug-in slot, and the positioning plug-in slot is adapted to the positioning plug-in block, when the second back clamp component 83 and the first back clamp component 82 are in a clamping state, the first positioning plug-in portion 831 is plugged with the second positioning plug-in portion 821, and the first positioning plug-in portion 831 and the second positioning plug-in portion 821 cooperate with each other, and the positioning clamping effect is significant.

[0069] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A multifunctional camera lighting device, characterized in that: It includes a housing assembly and a rear cover assembly, wherein: The shell assembly is provided with a receiving groove for accommodating a power supply assembly, and a sealing groove is circumferentially arranged on the shell assembly outside the notch of the receiving groove, and a liquid sealing medium is injected into the sealing groove, and the liquid sealing medium protrudes from the sealing groove, and the rear cover assembly is detachably covered on the sealing groove and compresses the liquid sealing medium.

2. The multifunctional imaging lighting device according to claim 1, characterized in that: The housing assembly includes a front housing assembly and a rear housing assembly, and the multifunctional camera lighting device includes a camera lighting assembly, a control assembly and a power supply assembly, wherein: The front shell assembly and the rear shell assembly are detachably connected and surround the accommodating cavity, and the camera lighting assembly and the control assembly are arranged in the accommodating cavity; The accommodating groove is opened on the side of the rear shell component away from the front shell component. The power supply component includes a main power supply and a secondary power supply. The main power supply is arranged in the accommodating groove, and the secondary power supply is arranged in the accommodating cavity, which is used to supply power to the multifunctional camera lighting device when the main power supply is replaced.

3. The multifunctional imaging lighting device according to claim 2, characterized in that: The control component comprises a main control board, on which a fall saving module, a motion detection module and a Beidou positioning module are integrated.

4. The multifunctional imaging lighting device according to claim 3, characterized in that: The control assembly comprises a sub-board bracket and a sub-control board, wherein: The auxiliary board bracket is arranged on the main control board; The auxiliary control board is arranged on the auxiliary board bracket, and an infrared night vision module is integrated on the auxiliary control board.

5. The multifunctional imaging lighting device according to claim 4, characterized in that: The camera lighting assembly includes a camera, a speaker and a microphone, wherein: The camera is arranged on the main control board, and a first clearance hole is arranged on the auxiliary board bracket at a position corresponding to the camera, and the first clearance hole passes through the rear shell assembly; The front housing assembly is provided with a first fixing groove in the accommodating cavity, and the speaker is installed in the first fixing groove; A second fixing groove is arranged on the rear shell assembly and located in the accommodating cavity, and the microphone is installed in the second fixing groove.

6. The multifunctional imaging lighting device according to claim 4, characterized in that: The camera lighting assembly includes a lamp bead and a lens, wherein: The lamp beads are arranged on the auxiliary control board; The lens cover is arranged outside the lamp bead, and a second clearance hole is arranged on the rear shell component at a position corresponding to the lens.

7. The multifunctional imaging lighting device according to claim 6, characterized in that: A first mounting groove is formed on a side of the rear shell component away from the front shell component. The first mounting groove corresponds to the camera lighting component. A transparent sheet is disposed in the first mounting groove.

8. The multifunctional imaging and lighting device according to claim 4, characterized in that: The control component includes a button component and an indication component, wherein: The button assembly is arranged on the side wall of the front shell assembly; The indicating component includes a laser head and a light guide. A third fixing groove is provided on the rear shell component. The laser head is arranged in the third fixing groove for direction and function indication. The light guide is arranged on the outer wall of the rear shell component for indicating light conduction.

9. The multifunctional imaging lighting device according to claim 2, characterized in that: The multifunctional camera lighting device comprises a screen assembly. A second mounting groove is arranged on the side of the front shell assembly away from the rear shell assembly, and the screen assembly is arranged in the second mounting groove.

10. The multifunctional imaging lighting device according to claim 2, characterized in that: The multifunctional video camera lighting device comprises a back clamp assembly, which comprises a back clamp base, a first back clamp component and a second back clamp component, wherein: The front shell assembly is provided with a first plug-in portion, the back clip base is provided with a second plug-in portion, and the first plug-in portion is plug-connected with the second plug-in portion; The mounting end of the first back clamp member is rotatably disposed on the back clamp base; The second back clamp component is arranged on a side of the first back clamp component away from the front shell component, the fixed end of the second back clamp component is rotatably connected to the first back clamp component, the movable end of the second back clamp component is provided with a first positioning and plug-in portion, and a second positioning and plug-in portion is provided on the first back clamp component at a position corresponding to the first positioning and plug-in portion, and the first positioning and plug-in portion can be plugged with the second positioning and plug-in portion.