Lamplight focusing device and photographic lamp

Abstract

The utility model relates to a light focusing device and a photographic lamp, belonging to the technical field of photographic equipment, the light focusing device is used for being installed in a lamp holder, and the light focusing device comprises a support frame, a movable plate, a light source and a driving mechanism. The lamp holder comprises a shell and a lens, a containing cavity is formed in the shell, and the lens covers a light outlet of the shell. The support frame is arranged in the accommodating cavity; a moving channel is arranged in the support frame; a light transmitting opening is formed in the side, facing the lens, of the supporting frame. The moving plate is movably arranged in the moving channel, and the light source is arranged on the moving plate and can move in the moving channel along with the moving plate; light emitted by the light source passes through the light transmitting opening and then is emitted out through the lens on the shell. The driving mechanism is arranged on the supporting frame and connected with the movable plate. The driving mechanism can drive the light source on the moving plate to move in the moving channel so as to be close to or away from the lens, so that the distance between the light source and the lens is changed, the focal length of the flash lamp is changed, and the flash lamp can irradiate different distances.

Description

Technical Field

[0001] The utility model relates to the technical field of photographic equipment, in particular to a light focusing device and a photographic lamp. Background Art

[0002] In order to meet the demand for lighting effects for photography and videography, users nowadays often use photography lighting tools such as camera-mounted flashes for fill light when taking photos and videos. Depending on the distance of the subject, the required lighting distance is also different.

[0003] Nowadays, when the brightness of lights at different distances needs to be adjusted, the position of the flash can only be moved as a whole. If the user uses a built-in flash, then since the built-in flash is fixed on the camera, the movement of the built-in flash will inevitably cause the camera to move as well. After the camera moves, the focus of the lens needs to be readjusted or the lens needs to be replaced, which is very cumbersome and inconvenient to use. If the user uses a large flash, the large flash needs to be installed on a fixed bracket, and it is also very inconvenient to move the large flash and the fixed bracket as a whole. Utility Model Content

[0004] The utility model aims to solve the technical problem that the traditional flash lamp cannot quickly adjust the light irradiation distance of the flash lamp according to the use requirements.

[0005] In order to solve the above technical problems, the utility model provides a light focusing device, which is used to be installed in a shell of a lamp holder, wherein a accommodating cavity is provided inside the shell, and a light outlet is opened on the front end surface of the shell, the light outlet connects the accommodating cavity with the external environment, and the light outlet is covered with a focusing lens; the light focusing device comprises: a support frame, which is arranged in the accommodating cavity; a moving channel is provided inside the support frame; a light-transmitting port is provided on the side of the support frame facing the focusing lens, and the light-transmitting port connects the moving channel and the accommodating cavity; a moving plate, which is movably arranged in the moving channel of the support frame and can approach or move away from the focusing lens; a light source, which is arranged on the moving plate and can move with the moving plate in the moving channel; the light emitted by the light source passes through the light-transmitting port and then is emitted through the focusing lens on the shell; a driving mechanism, which is arranged on the support frame and connected to the moving plate; the driving mechanism can drive the moving plate and the light source on the moving plate to move in the moving channel.

[0006] Optionally, the driving mechanism includes a screw and a driving motor; the screw is rotatably arranged on the support frame and is arranged along the extension direction of the moving channel; the moving plate is arranged on the screw and is threadedly connected to the screw; the driving motor is transmission-connected to the screw, and the driving motor can drive the screw to rotate around its own axis, thereby making the moving plate and the light source thereon, which are inserted through the screw, move along the extension direction of the screw.

[0007] Optionally, the driving mechanism also includes a transmission assembly, which is arranged on the support frame; at least two screw rods are provided, and all the screw rods are arranged around the circumference of the movable plate; the transmission assembly is respectively connected to the driving motor and all the screw rods, so that the driving motor can drive all the screw rods to rotate synchronously through the transmission assembly.

[0008] Optionally, the transmission assembly includes a first transmission tooth, a second transmission tooth and a synchronous belt; the first transmission tooth sleeve is arranged on the power output end of the drive motor; the second transmission tooth sleeve is arranged on the screw; the synchronous belt is arranged on the first transmission tooth and the second transmission tooth, and the first transmission tooth on the drive motor can drive the synchronous belt to rotate, and then the synchronous belt drives the second transmission tooth on the screw to rotate, so that the drive motor can drive the screw to rotate.

[0009] Optionally, the support frame includes a front fixing plate, a rear fixing plate and a guide rod; the front fixing plate is fixedly arranged on a side of the accommodating cavity close to the focusing lens, the front fixing plate is provided with the light-transmitting port, the light-transmitting port is aligned with the light outlet of the shell, and the area of ​​the light-transmitting port is greater than or equal to the area of ​​the light outlet; the rear fixing plate is fixedly arranged on a side of the front fixing plate away from the focusing lens, and is spaced apart from the front fixing plate; the guide rod is arranged between the front fixing plate and the rear fixing plate, one end of the guide rod is connected to the front fixing plate, and the other end of the guide rod is connected to the rear fixing plate; the movable plate is slidably connected to the guide rod and can slide along the guide rod.

[0010] Optionally, the light source includes an LED light board, which is arranged at the center of the movable plate; the LED light board can receive an external control signal and emit light.

[0011] Optionally, the light source further includes a heat sink, one side of which is fixed to the movable plate so that the heat sink can move with the movable plate; the other side of the heat sink is connected to the LED light board.

[0012] This embodiment also provides a photographic light, comprising: a lamp head, which includes a shell and a focusing lens arranged at the light outlet of the shell; the shell is provided with the light focusing device as described above; a body, connected to the lamp head; the body is provided with a power supply unit and a control circuit, and the power supply unit is electrically connected to the light source and driving mechanism of the light focusing device through the control circuit.

[0013] Optionally, the body is connected to the shell of the lamp holder via a rotating shaft, so that the lamp holder can rotate around the axis of the rotating shaft.

[0014] Optionally, the focusing lens is a Fresnel mirror.

[0015] It can be seen from the above technical solution that the beneficial effects of the utility model are:

[0016] The present application provides a light focusing device and a photographic light, wherein the light focusing device comprises a support frame arranged in a lamp head, a movable plate arranged in the support frame, a light source arranged on the movable plate, and a driving mechanism for driving the light source to move. The driving mechanism can drive the movable plate and the light source thereon to move in a moving channel in the support frame, so that the distance between the light source and the focusing lens on the light outlet of the lamp head housing can be adjusted at any time to change the focal length of the photographic light so that it can illuminate different distances. By adjusting the focal length of the photographic light through the driving mechanism, the whole process is simple and convenient, and there is no need to adjust the position of the photographic light, which can greatly improve the use efficiency of the photographic light. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the half-section three-dimensional structure of the photographic light in this embodiment.

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the light focusing device when the light source is away from the focusing lens.

[0019] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the light focusing device when the light source is far away from the focusing lens.

[0020] Figure 4 for Figure 1 A schematic diagram of the front view structure of the light focusing device in FIG.

[0021] Figure 5 for Figure 1 A schematic diagram of the three-dimensional structure of the support frame, light source and driving mechanism of the light focusing device in FIG.

[0022] The following are the descriptions of the reference numerals:

[0023] 100, photographic light; 10, light focusing device; 11, lamp head; 111, housing; 1111, light outlet; 112, focusing lens; 12, support frame; 120, moving channel; 121, front fixing plate; 1211, light outlet; 122, rear fixing plate; 123, guide rod; 13, light source; 131, circuit board; 132, light board; 133, heat sink; 14, driving mechanism; 141, driving motor; 142, screw; 143, first transmission gear; 144, second transmission gear; 145, synchronous belt; 15, moving plate; 20, fuselage; 21, power supply unit; 22, control button; 23, hot shoe; 24, rotating shaft. DETAILED DESCRIPTION

[0024] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0025] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0026] 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. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] When a traditional flash needs to adjust the brightness of light at different distances, the camera and the flash can only be moved as a whole. However, after the camera is moved, the focal length of the lens needs to be readjusted or the lens needs to be replaced, which is very cumbersome and inconvenient to use. In order to solve the above technical problems, this embodiment provides a light focusing device and a photographic light capable of automatic focusing.

[0028] This embodiment is based on the working state of the video light when it is working normally. The front refers to the direction in which the light of the video light is emitted, and the rear refers to the direction away from the direction in which the light is emitted.

[0029] See also Figures 1 to 5The video light 100 in this embodiment includes a body 20 and a lamp head 11. The lamp head 11 is provided with a light focusing device 10 for changing the focal length of the video light 100.

[0030] In some embodiments, the lamp head 11 includes a housing 111 and a focusing lens 112. A housing cavity is provided inside the housing 111, and a light outlet 1111 is provided on the front surface of the housing 111, and the light outlet 1111 connects the housing cavity with the external environment. The focusing lens 112 covers the light outlet 1111 of the housing 111, and is used to focus the light passing through the focusing lens 112.

[0031] See also Figures 1 to 3 In some embodiments, the housing 111 of the lamp holder 11 may be made of a high-strength heat-resistant material, which has good durability and heat dissipation and impact resistance. The housing 111 may be an integrally formed design, and the housing 111 may be horn-shaped. The accommodating cavity inside the housing 111 may also be set to a horn shape to facilitate the emission of light in the accommodating cavity.

[0032] In some embodiments, the shape of the light outlet 1111 on the front face of the housing 111 may be circular, and the light outlet 1111 connects the accommodating cavity of the housing 111 with the external environment, so that the light emitted by the light source 13 in the housing 111 can be smoothly emitted through the light outlet 1111. The diameter of the light outlet 1111 may be determined according to the size of the focusing lens 112 or the light effect to be achieved.

[0033] In some embodiments, the focusing lens 112 may be a Fresnel lens, which has good optical focusing performance. The focusing lens 112 may be fixed to the light outlet 1111 of the housing 111 by means of a slot or screws to isolate the housing cavity of the housing 111 from the external environment, so that the light emitted by the light source 13 in the housing 111 can be focused by the focusing lens 112 and then emitted. In addition, the curvature of the focusing lens 112 may be selected according to actual conditions to achieve the best light effect.

[0034] See also Figures 1 to 5 In some embodiments, the light focusing device 10 includes a support frame 12 disposed in the lamp head 11, a movable plate 15 disposed in the support frame 12, a light source 13 disposed on the movable plate 15, and a driving mechanism 14 for driving the light source 13 to move.

[0035] The support frame 12 is disposed in the housing cavity of the housing 111. A moving channel 120 is disposed inside the support frame 12; a light-transmitting port 1211 is disposed on the side of the support frame 12 facing the focusing lens 112, and the light-transmitting port 1211 connects the moving channel 120 with the housing cavity. The moving plate 15 is movably disposed in the moving channel 120 of the support frame 12, and can move along the extension direction of the moving channel 120.

[0036] The light source 13 is disposed on the moving plate 15 and can move along with the moving plate 15 in the moving channel 120. The light emitted by the light source 13 passes through the light-transmitting opening 1211 and then passes through the focusing lens 112 on the housing 111 and is emitted.

[0037] The driving mechanism 14 is disposed on the support frame 12 and connected to the moving plate 15; the driving mechanism 14 can drive the moving plate 15 and the light source 13 thereon to move in the moving channel 120 to approach or move away from the focusing lens 112, thereby changing the distance between the light source 13 and the focusing lens 112. The distance between the light source 13 and the focusing lens 112 on the light outlet 1111 of the housing 111 can be adjusted at any time to change the focal length of the video light 100, so that the brightness of the light at different distances can be quickly adjusted.

[0038] See also Figure 2 and Figure 5 In some embodiments, the support frame 12 includes a front fixing plate 121 , a rear fixing plate 122 and a guide rod 123 .

[0039] The front fixing plate 121 is arranged on a side close to the focusing lens 112, and the light transmission port 1211 is arranged on the front fixing plate 121. The rear fixing plate 122 is arranged on a side of the front fixing plate 121 away from the focusing lens 112, and is spaced apart from the front fixing plate 121. The guide rod 123 is arranged between the front fixing plate 121 and the rear fixing plate 122, one end of the guide rod 123 is connected to the front fixing plate 121, and the other end of the guide rod 123 is connected to the rear fixing plate 122, so as to connect and fix the front fixing plate 121 and the rear fixing plate 122.

[0040] In some embodiments, the shapes and sizes of the front fixing plate 121 and the rear fixing plate 122 can match the accommodating cavity in the housing 111, so that the outer edges of the front fixing plate 121 and the rear fixing plate 122 can be fixed to the inner wall of the accommodating cavity of the housing 111 by screws or slots. In addition, the axis of the light-transmitting port 1211 on the front fixing plate 121 is aligned with the axis of the light-emitting port 1111 of the housing 111 to ensure that light can accurately pass through the light-transmitting port 1211 to be emitted to the focusing lens 112.

[0041] In some embodiments, the area of ​​the light-transmitting opening 1211 on the front fixing plate 121 is greater than or equal to the area of ​​the light-exiting opening 1111 on the housing 111. That is, the area of ​​the light-transmitting opening 1211 is not less than the area of ​​the light-exiting opening 1111, so as to ensure that the light is not blocked when passing through the light-transmitting opening 1211, and can be completely emitted through the focusing lens 112 on the light-exiting opening 1111 of the housing 111.

[0042] In some embodiments, the number of guide rods 123 of the support frame 12 can be selected according to actual conditions, and two, three, or four guide rods 123 can be provided, as long as the connection between the front fixing plate 121 and the rear fixing plate 122 and the guidance of the light source 13 can be achieved.

[0043] It should be understood that the open space between the front fixing plate 121, the rear fixing plate 122, and the guide rod 123 in this embodiment forms the moving channel 120. The moving channel 120 can extend in a direction perpendicular to the focusing lens 112, that is, in the axial direction of the guide rod 123, so that the light source 13 can move closer to or farther away from the focusing lens 112 when moving left and right in the moving channel 120.

[0044] It is conceivable that the support frame 12 may also be a cylindrical structure, which may be a cylinder with one end open or both ends open. The inner space of the cylinder may form the moving channel 120, and the light source 13 may be slidably disposed on the inner wall of the cylindrical structure to approach or move away from the focusing lens 112 to adjust the focal length of the video light 100. Of course, the support frame 12 may also be in other shapes, as long as the light source 13 can slide inside it to change the distance between it and the focusing lens 112, and will not block the emission of light.

[0045] See also Figure 2 and Figure 5 In some embodiments, the movable plate 15 may be disposed between the front fixed plate 121 and the rear fixed plate 122. A guide rail sleeve may be disposed on the movable plate 15, and a guide hole may be disposed in the guide rail sleeve. The guide rod 123 may be inserted into the guide hole so that the movable plate 15 can slide along the axial direction of the guide rod 123.

[0046] Of course, in some other embodiments, a slider may be provided on the movable plate 15 , and a slide groove may be provided on the guide rod 123 , and a sliding connection between the slider and the slide groove may be realized to realize a sliding connection between the movable plate 15 and the guide rod 123 .

[0047] See also Figure 2 and Figure 5 In some embodiments, the driving mechanism 14 includes a screw 142 and a driving motor 141 .

[0048] The screw 142 is rotatably mounted on the support frame 12 and is arranged along the extension direction of the moving channel 120. The moving plate 15 is arranged on the screw 142 and is threadedly connected to the screw 142. The driving motor 141 is in transmission connection with the screw 142. The driving motor 141 can drive the screw 142 to rotate around its own axis, thereby driving the moving plate 15 and the light source 13 thereon to move along the extension direction of the screw 142 to change the distance between the light source 13 and the focusing lens 112.

[0049] Specifically, the screw 142 is disposed between the front fixing plate 121 and the rear fixing plate 122 and is parallel to the guide rod 123. The two ends of the screw 142 can be connected to the front fixing plate 121 and the fixing plate through bearings, so that the screw 142 can rotate around its own axis. In addition, an external thread is provided on the outer wall of the screw 142, and a nut is fixed on the outer edge of the movable plate 15. The nut is provided with a threaded hole, and the screw 142 is inserted into the threaded hole. The driving motor 141 can drive the screw 142 to rotate around its own axis, so as to drive the movable plate 15 inserted on the screw 142 to move precisely along the axis direction of the screw 142, so as to change the distance between the movable plate 15 and the light source 13 on the movable plate 15 and the focusing lens 112, thereby realizing precise focusing of the photographic light 100.

[0050] It is conceivable that the driving mechanism 14 can also be a motor and a telescopic rod, and the motor can drive the telescopic rod to extend or shorten, so as to drive the moving plate 15 and the light source 13 on the moving plate 15 away from or close to the focusing lens 112, so as to achieve the purpose of automatic focusing. Of course, the driving mechanism 14 can also be a motor and a multi-link mechanism, and the motor drives the end of the multi-link mechanism to make a linear reciprocating movement, so as to drive the moving plate 15 to slide along the guide rod 123, thereby changing the distance between the moving plate 15 and the focusing lens 112.

[0051] In some embodiments, at least two screws 142 are provided, and the plurality of screws 142 are arranged around the circumference of the moving plate 15. The specific number of the screws 142 can be adjusted according to actual needs, and is usually two or more, and the screws 142 are evenly distributed around the moving plate 15 to form a ring layout to ensure a stable moving effect of the moving plate 15 during the moving process.

[0052] It is conceivable that, in some embodiments, a plurality of drive motors 141 may be provided, that is, a drive motor 141 is provided at the end of each screw rod 142. The plurality of drive motors 141 may be servo motors, which can rotate synchronously after receiving a control signal, so as to drive the plurality of screw rods 142 to rotate synchronously, thereby causing the movable plate 15 to move left and right along the axis direction of the screw rod 142.

[0053] See also Figure 2 and Figure 5 In some embodiments, the driving mechanism 14 further includes a transmission assembly disposed on the support frame 12. The transmission assembly is respectively connected to the driving motor 141 and the screw rod 142, so that the driving motor 141 can drive the screw rod 142 to rotate through the transmission assembly.

[0054] In some embodiments, the transmission assembly includes a first transmission tooth 143, a second transmission tooth 144 and a synchronous belt 145. The first transmission tooth 143 is sleeved on the power output end of the driving motor 141; the second transmission tooth 144 is sleeved on the screw 142. The synchronous belt 145 is arranged on the first transmission tooth 143 and the second transmission tooth 144. The first transmission tooth 143 on the driving motor 141 can drive the synchronous belt 145 to rotate, and then the synchronous belt 145 drives the second transmission tooth 144 on the screw 142 to rotate, so that the driving motor 141 can drive multiple screws 142 to rotate synchronously.

[0055] Specifically, the driving motor 141 is fixed on the rear side of the rear fixing plate 122, and the power output shaft of the driving motor 141 passes through the rear fixing plate 122 and is connected to the first transmission tooth 143. The second transmission tooth 144 is also fixedly connected to one end of the screw rod 142 near the front side of the rear fixing plate 122, and the first transmission tooth 143 and the second transmission tooth 144 are in the same plane. The inner side of the synchronous belt 145 is provided with a tooth groove for meshing with the first transmission tooth 143 and the second transmission tooth 144. When the synchronous belt 145 is set on the first transmission tooth 143 and the second transmission tooth 144, the driving motor 141 can drive the synchronous belt 145 to rotate through the first transmission tooth 143, and make the synchronous belt 145 drive multiple screw rods 142 to rotate synchronously. The transmission process of the entire transmission assembly is stable, the assembly structure is simple, and the production cost is low, which can effectively improve the competitiveness of the product.

[0056] In some embodiments, a steering wheel may be further provided on the guide rod 123, the steering wheel is rotatably connected to the guide rod 123, and the steering wheel is located in the same plane as the first transmission gear 143 and the second transmission gear 144. The synchronous belt 145 may be sleeved on the first transmission gear 143, the second transmission gear 144 and the steering wheel, so that the synchronous belt 145 can be arranged around the outer edge of the rear fixing plate 122, so that the synchronous belt 145 can perform better transmission.

[0057] It is conceivable that in some other embodiments, the transmission assembly may also be a plurality of gears connected between the drive motor 141 and the screw rod 142, or a sprocket and a chain provided between the drive motor 141 and the screw rod 142. It only needs to be able to achieve a transmission connection between the drive motor 141 and the plurality of screw rods 142.

[0058] See also Figure 4 and Figure 5 In some embodiments, the light source 13 may include an LED light board. The LED light board may be composed of a circuit board 131 and a light board 132 capable of emitting light. The circuit board 131 is disposed at the center of the moving plate 15, the light board 132 is disposed on the circuit board 131 and is electrically connected to the circuit board 131, and the circuit board 131 may control the light board 132 to emit various lights.

[0059] Specifically, the circuit board 131 can be installed to the center of the movable plate 15 by screws, and the light board 132 can be fixed to the center of the circuit board 131, so that the light board 132, the light-transmitting port 1211, and the focusing lens 112 are on the same axis, and the light can be completely emitted from the light-transmitting port 1211 and the focusing lens 112.

[0060] The light board 132 may be an LED lamp bead or other light-emitting element assembly. A control unit is integrated on the circuit board 131, and the control unit can receive a control signal and adjust the working state of the light board 132. For example, when the circuit board 131 receives an external signal, it can adjust the light state of the light board 132 according to a preset control program to control the light board 132 to emit different colors, different brightness of constant light or high brightness pulse flash to meet different lighting needs.

[0061] See also Figure 2 and Figure 5 In some embodiments, the light source 13 further includes a heat sink 133. One side of the heat sink 133 is fixed on the movable plate 15 so that the heat sink 133 can move with the movable plate 15. The other side of the heat sink 133 is connected to the LED light board to dissipate the heat generated by the LED light board to the accommodating cavity.

[0062] Specifically, a through hole can be provided at the center of the movable plate 15, and the rear side of the heat sink 133 is fixed to the front side of the movable plate 15 and aligned with the through hole to enhance the heat dissipation effect of the heat sink 133. The circuit board 131 and the light board 132 are fixed to the front side of the heat sink 133 to achieve connection with the movable plate 15.

[0063] The heat sink 133 may be a fin heat sink 133, which is attached to one side of the circuit board 131 and the light board 132 and can quickly transfer heat to the heat sink fins to dissipate heat from the circuit board 131 and the light board 132, thereby increasing the service life of the circuit board 131 and the light board 132. Of course, the heat sink 133 may be a fan heat sink 133, which can generate a flowing airflow to dissipate the heat on the circuit board 131 and the light source 13 into the accommodating cavity of the housing 111.

[0064] See also Figure 1 In some embodiments, the photographic light 100 can be a set-top flash, and the body 20 of the set-top flash is rotatably connected to the shell 111 via a rotating shaft 24, so that the lamp head 11 can be pitched and rotated on the body 20, thereby changing the light output angle of the light focusing device 10 in the lamp head 11, so as to further improve the convenience of using the photographic light 100.

[0065] In some other embodiments, the photographic light 100 may be a studio flash or an outdoor flash; the body 20 and the housing 111 of the lamp head 11 may be an integrated structure or two independent housing structures. The lamp head 11 may rotate on the body 20 or may be fixedly connected to the body 20.

[0066] See also Figure 1 In some embodiments, a power supply unit 21 and a control circuit are provided in the body 20 of the photography light 100. The power supply unit 21 is electrically connected to the light source 13 and the driving mechanism 14 of the light focusing device 10 through the control circuit.

[0067] The power supply unit 21 may be a battery or a power supply interface detachably connected to the body 20 . The power supply unit 21 may be electrically connected to the light source 13 and the driving motor 141 through a control circuit to supply power to the light source 13 and the driving motor 141 .

[0068] In some embodiments, the control circuit may also be provided with a signal processing unit, which may receive an external control signal and drive the driving motor 141 to rotate according to the external control signal, thereby causing the screw 142 to drive the light source 13 on the moving plate 15 to move closer to or away from the focusing lens 112. In addition, the control circuit may also adjust the flashing mode of the light board 132 on the circuit board 131 according to the external control signal to adapt to different lighting environments.

[0069] In some embodiments, a control button 22 may be provided on the body 20, and the control button 22 may be electrically connected to the control circuit and input a control signal to the control circuit. The user may control the rotation of the drive motor 141 or adjust the light state of the light board 132 by pressing the control button 22.

[0070] In some embodiments, a hot shoe 23 is also provided on the bottom of the body 20, and the hot shoe 23 can be quickly docked with a camera, a camcorder or other photographic equipment to quickly install the photographic light 100 on the photographic equipment and achieve signal communication with the photographic equipment.

[0071] In summary, the light focusing device 10 and the photographic light 100 in this embodiment, the light focusing device 10 includes a support frame 12 arranged in the lamp head 11, a light source 13 arranged in the support frame 12, and a driving mechanism 14 for driving the light source 13 to move. The driving mechanism 14 can drive the light source 13 to move in the moving channel 120 in the support frame 12, so that the distance between the light source 13 and the focusing lens 112 on the light outlet 1111 of the housing 111 can be adjusted at any time to change the focal length of the photographic light 100 so that it can illuminate different distances. The focal length of the photographic light 100 is adjusted by the driving mechanism 14, and the whole process is simple and convenient, which can greatly improve the use efficiency of the photographic light 100.

[0072] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A light focusing device, characterized in that: A housing for installation in a lamp holder, wherein a housing cavity is provided inside the housing, a light outlet is provided on the front end surface of the housing, the light outlet connects the housing cavity with the external environment, and a focusing lens is covered at the light outlet; the light focusing device comprises: A support frame is arranged in the accommodating cavity; a moving channel is arranged inside the support frame; a light-transmitting port is arranged on a side of the support frame facing the focusing lens, and the light-transmitting port connects the moving channel and the accommodating cavity; A movable plate, movably disposed in a movable channel of the support frame, and capable of moving closer to or farther from the focusing lens; A light source is arranged on the movable plate and can move along with the movable plate in the movable channel; light emitted by the light source passes through the light-transmitting port and then is emitted through a focusing lens on the housing; A driving mechanism is arranged on the supporting frame and connected to the moving plate; the driving mechanism can drive the moving plate and the light source on the moving plate to move in the moving channel.

2. The light focusing device according to claim 1, characterized in that: The driving mechanism includes a screw and a driving motor; the screw is rotatably arranged on the support frame and is arranged along the extension direction of the moving channel; The movable plate is arranged on the screw rod and is threadedly connected to the screw rod; the driving motor is transmission-connected to the screw rod, and the driving motor can drive the screw rod to rotate around its own axis, thereby moving the movable plate and the light source thereon which are passed through the screw rod along the extension direction of the screw rod.

3. The light focusing device according to claim 2, characterized in that: The driving mechanism further comprises a transmission assembly, and the transmission assembly is arranged on the support frame; There are at least two screw rods, and all the screw rods are arranged around the circumference of the movable plate; the transmission assembly is respectively connected to the drive motor and all the screw rods, so that the drive motor can drive all the screw rods to rotate synchronously through the transmission assembly.

4. The light focusing device according to claim 3, characterized in that: The transmission assembly includes a first transmission tooth, a second transmission tooth and a synchronous belt; The first transmission gear sleeve is arranged on the power output end of the driving motor; the second transmission gear sleeve is arranged on the screw rod; the synchronous belt is arranged on the first transmission gear and the second transmission gear, and the first transmission gear on the driving motor can drive the synchronous belt to rotate, and then the synchronous belt drives the second transmission gear on the screw rod to rotate, so that the driving motor can drive the screw rod to rotate.

5. The light focusing device according to claim 1, characterized in that: The support frame includes a front fixing plate, a rear fixing plate and a guide rod; The front fixing plate is fixedly arranged on a side of the accommodating cavity close to the focusing lens, the front fixing plate is provided with the light-transmitting port, the light-transmitting port is aligned with the light outlet of the shell, and the area of ​​the light-transmitting port is greater than or equal to the area of ​​the light outlet; the rear fixing plate is fixedly arranged on a side of the front fixing plate away from the focusing lens, and is spaced apart from the front fixing plate; the guide rod is arranged between the front fixing plate and the rear fixing plate, one end of the guide rod is connected to the front fixing plate, and the other end of the guide rod is connected to the rear fixing plate; the movable plate is slidably connected to the guide rod, and can slide along the guide rod.

6. The light focusing device according to claim 1, characterized in that: The light source comprises an LED light board, and the LED light board is arranged at the center of the movable board; the LED light board can receive an external control signal and emit light.

7. The light focusing device according to claim 6, characterized in that: The light source also includes a heat sink, one side of which is fixed to the movable plate so that the heat sink can move with the movable plate; the other side of the heat sink is connected to the LED light board.

8. A photographic light, characterized in that: include: A lamp holder, comprising a housing and a focusing lens arranged at a light outlet of the housing; the housing is provided with a light focusing device as claimed in any one of claims 1 to 7; The fuselage is connected to the lamp head; a power supply unit and a control circuit are arranged in the fuselage, and the power supply unit is electrically connected to the light source and the driving mechanism of the light focusing device through the control circuit.

9. The photographic light according to claim 8, characterized in that: The body is connected to the housing of the lamp holder via a rotating shaft, so that the lamp holder can rotate around the axis of the rotating shaft.

10. The photographic light according to claim 8, characterized in that: The focusing lens is a Fresnel mirror.

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