flash

Abstract

The present disclosure discloses a flashlight, comprising a main body and a lamp holder, the lamp holder being rotatably connected to the main body via a rotating shaft, and the lamp holder being movably connected to the main body via the rotating shaft. The lamp holder comprises a housing having an internal accommodating cavity, a lamp tube assembly disposed within the housing accommodating cavity, a photometric lens disposed at a light outlet of the housing and facing the lamp tube assembly, and a fan disposed within the accommodating cavity. The fan is mounted within the accommodating cavity of the housing and located below the lamp tube assembly, with an air inlet facing the fan and an air outlet facing the photometric lens and the lamp tube assembly.

Description

Technical Field

[0001] The present disclosure relates to the field of photographic equipment, and in particular to a flashlight. Background Art

[0002] Flashlights are auxiliary tools in photography, often used to provide fill light for cameras and other photographic equipment. When a flashlight is operating, the lamp generates a large amount of heat. After multiple flashes, the light distribution lens in front of the lamp softens and deforms due to the heat, affecting the flash's light distribution. Summary of the Invention

[0003] In order to solve the problem in the related art that the light distribution lens is easily deformed by heat, the present disclosure provides a flash lamp that can effectively prevent the light distribution lens from deforming.

[0004] The present disclosure provides a flash lamp for photographic lighting, comprising:

[0005] the subject; and

[0006] A lamp holder, which is movably connected to the main body via a rotating shaft, and the lamp holder includes:

[0007] A housing having an accommodating cavity formed therein, one end of the housing being connected to the rotating shaft, the other end of the housing away from the rotating shaft having a light outlet, and an air inlet being formed at the bottom of the housing;

[0008] a lamp tube assembly, which is disposed in the accommodating cavity of the housing;

[0009] a light distribution lens, which is arranged opposite to the lamp tube assembly and located at the light outlet of the housing; and

[0010] A fan is installed in the accommodating cavity of the shell and is located below the lamp tube assembly. The air inlet faces the fan, and the air outlet of the fan faces the light distribution lens and the lamp tube assembly.

[0011] Optionally, a ventilation gap for discharging hot air is formed between the shell and the rotating shaft, and a ventilation port is provided at one end of the shell connected to the rotating shaft, and the ventilation gap is connected to the accommodating cavity in the shell through the ventilation port.

[0012] Optionally, the shell includes an upper shell and a lower shell, the upper shell and the lower shell form the accommodating cavity, the fan is located on the inner side of the lower shell, an air duct is formed in the accommodating cavity, the air duct extends from the lower shell to the upper shell and is connected to the ventilation gap through the vent.

[0013] Optionally, the lamp tube assembly includes:

[0014] a reflector fixed in the accommodating cavity of the housing, the reflector comprising a main cavity and a sub-cavity formed below the main cavity, the fan being installed in the sub-cavity;

[0015] a guide rail mounted on the top of the reflector;

[0016] a reflective cup located in the inner cavity of the reflector, the reflective cup comprising a cup holder and a cup body connected below the cup holder, the cup holder being mounted on the guide rail so that the reflective cup can move along the guide rail, and the opening of the cup body facing the light distribution lens; and

[0017] A lamp tube is installed in the cup body, and light emitted by the lamp tube is emitted toward the light-distributing lens through the opening of the cup body.

[0018] Optionally, the sub-cavity is arranged to be tilted relative to the main cavity to limit the installation direction of the fan so that the air outlet of the fan faces the lamp tube and the light distribution lens.

[0019] Optionally, the inner side surface of the reflector is a high-gloss surface capable of causing diffuse reflection of light;

[0020] The inner side surface of the cup body is a reflective mirror surface, and the cup body is formed by stamping of sheet metal.

[0021] Optionally, the flash lamp further includes a motor module fixed in the accommodating cavity of the housing, the motor module is connected to the cup holder of the reflective cup, and can drive the reflective cup to move toward or away from the light distribution lens.

[0022] Optionally, silicone sleeves for reducing vibration and noise are provided on the four sides of the fan.

[0023] Optionally, a dust filter is detachably installed at the air inlet, and the dust filter covers the air inlet.

[0024] Optionally, the flash further includes a diffusion lens, which is located at the light outlet of the housing and closes the light outlet;

[0025] The light-distributing lens is a Fresnel lens.

[0026] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0027] The present disclosure provides a flashlight, which includes a main body and a lamp head. The lamp head is rotatably connected to the main body via a rotating shaft, and the lamp head is movably connected to the main body via the rotating shaft. The lamp head includes a shell having an internal accommodating cavity, a lamp tube assembly disposed in the shell accommodating cavity, a photometric lens disposed at the light outlet of the shell and facing the lamp tube assembly, and a fan located in the accommodating cavity. The fan is installed in the accommodating cavity of the shell and is located below the lamp tube assembly, with an air inlet facing the fan, and an air outlet of the fan facing the photometric lens and the lamp tube assembly. In this way, the fan can blow air to the photometric lens, reduce the temperature of the photometric lens, and effectively prevent the photometric lens from being deformed due to heat.

[0028] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0030] Figure 1 The figure is a cross-sectional view showing a reflective cup of a flash lamp moved to the front end according to an exemplary embodiment.

[0031] Figure 2 is an exploded diagram of a flash lamp according to an exemplary embodiment.

[0032] Figure 3 The figure is a schematic diagram showing the airflow direction inside a flash lamp head according to an exemplary embodiment.

[0033] Figure 4 FIG1 is a cross-sectional view showing a reflective cup of a flash lamp moved to the rear end according to an exemplary embodiment. DETAILED DESCRIPTION

[0034] In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0035] The present disclosure provides a flashlight that can be mounted on the top of a camera to provide fill light or lighting for the camera environment. The flashlight does not need to be fixed on the top of the camera, but can be placed separately and connected to the camera via a wireless connection to establish an electrical signal.

[0036] like Figure 1 As shown, the flashlight 100 includes a lamp head 10 and a main body 30. The main body 30 is provided with a rotating shaft 31, and the lamp head 10 is movably connected to the main body 30 via the rotating shaft 31. The lamp head 10 can rotate horizontally and swing vertically around the main body 30. The horizontal rotation angle range is -150° to 180°, and the vertical swing angle range is -7° to 120°.

[0037] The lamp head 10 includes a fan 11 , a housing 12 , a light distribution lens 13 and a lamp tube assembly 14 .

[0038] An accommodating cavity 123 is formed inside the housing 12 . One end of the housing 12 is connected to the rotating shaft 31 , and an end away from the rotating shaft 31 has a light outlet. The light distribution lens 13 is disposed at the light outlet of the housing 12 .

[0039] Combine Figure 2 As shown, the housing 12 includes an upper housing 121 and a lower housing 122 . Both the upper housing 121 and the lower housing 122 are formed with inner cavities, and the two are combined to form a receiving cavity 123 of the housing 12 .

[0040] The lamp tube assembly 14 is disposed in the accommodating cavity 123 of the shell 12 and is fixed to the upper shell 121. The lower shell 122 is provided with an air inlet 114. The fan 11 is installed in the accommodating cavity 123 of the shell 12 and is located at the air inlet 114, with the air inlet 114 facing the fan 11. The fan 11 is located below the lamp tube assembly 14, and the air outlet of the fan 11 is directed toward the photometric lens 13 and the lamp tube assembly 14. In this way, the fan 11 can blow air toward the photometric lens 13 and the lamp tube assembly 14, so that the lower temperature airflow blown in by the fan 11 is mixed with the hot airflow emitted by the lamp tube assembly 14, thereby reducing the temperature inside the accommodating cavity 123 of the shell 12 and preventing the photometric lens 13 from softening and deforming due to excessive temperature.

[0041] An air duct is formed in the accommodating cavity 123 of the housing 12, and the air duct extends from the lower housing 122 to the upper housing 121. Figure 3 As shown, Figure 3 As shown by the arrow in, external wind enters the accommodating cavity of the shell 12 through the air inlet 114, and the fan 11 blows air to the space between the light distribution lens 13 and the lamp tube assembly 14. The mixed airflow flows toward the inner cavity of the upper shell 121 and flows through the gap between the periphery of the lamp holder PCB board 18 and the shell 12 to the vent 125 of the shell 12. The vent 125 is located at one end of the shell 12 connected to the rotating shaft 31.

[0042] A ventilation gap 34 for exhausting hot air is formed between the housing 12 and the rotating shaft 31. The ventilation gap 34 is connected to the accommodating cavity 123 in the housing 12 through the vent 125. The rotating shaft 31 is provided with an air outlet 32 ​​and an air outlet 33 connected to the ventilation gap 34.

[0043] When the air pressure in the accommodating cavity of the shell 12 increases to a predetermined pressure, the mixed hot air squeezes into the ventilation gap 34 from the vent 125 of the shell 12 and is discharged through the air outlet 32 ​​and the air outlet 33, thereby reducing the temperature inside the shell 12.

[0044] The lamp tube assembly 14 includes a reflector 141, a guide rail 144, a reflective cup 142, and a lamp tube 143 mounted on the reflective cup 142. The reflector 141 is used to mount the reflective cup 142 and the motor module 17 (as shown in 2). The inner surface 1413 of the reflector 141 is a high-gloss surface that can cause diffuse reflection of light. The light emitted by the lamp tube 143 is reflected by the inner surface 1413 of the reflector 141 and then emitted from the opening of the reflector 141, playing a certain focusing effect. The reflector 141 is installed in the accommodating cavity 123 of the shell 12. The upper surface of the reflector 141 is connected to the upper shell 121, and the lower surface is connected to the lower shell 122. A main cavity 1411 is formed inside the reflector 141, and a sub-cavity 1412 is formed below the main cavity 1411. The sub-cavity 1412 is connected to the main cavity 1411. The sub-cavity 1412 is tilted relative to the main cavity 1411, so as to limit the installation direction of the fan 11, so that the air outlet of the fan 11 can be directed towards the lamp tube 143 and the light distribution lens 13, and blow air to cool the lamp tube 143 and the light distribution lens 13. The fan 11 is tilted relative to the light distribution lens 13, and the angle formed by the fan 11 and the light distribution lens 13 is approximately 30° to 55°, so that the fan 11 can be aimed at the center of the light distribution lens 13 to blow air and dissipate heat. The sub-cavity 1412 is surrounded by four side surfaces 1412a and an inclined bottom surface 1412b, and the inclined bottom surface 1412b is formed by the inner wall of the main cavity 1411 extending downward. The reflector 141 can be made of opaque plastic and has a roughly circular opening. It can be understood that the opening can also be square or other shapes.

[0045] Two guide rails 144 are mounted on the top of the reflector 141. The reflective cup 142 includes a cup holder 1421 and a cup body 1422 connected to the bottom of the cup holder 1421. The cup holder 1421 is provided with two through-holes, through which the two guide rails 144 pass, allowing the cup holder 1421 to be mounted on the two guide rails 144, allowing the reflective cup 142 to move along the guide rails. The cup body 1422 has an arc-shaped cavity and an opening that faces the light distribution lens 13. The inner side surface 1422a of the cup body 1422 is a reflective mirror surface. The cup body 1422 is formed by stamping sheet metal. The sheet metal can be aluminum.

[0046] The lamp tube 143 is installed in the arc-shaped cavity of the cup body 1422 . Part of the light it emits is directly emitted to the light distribution lens 13 through the opening of the cup body 1422 , and the other part of the light is reflected by the inner side surface 1422 a of the cup body 1422 and then emitted to the light distribution lens 13 .

[0047] The housing 12 further includes a motor module 17 disposed in the housing cavity. The motor module 17 includes a motor 171, a screw rod 172 connected to the motor 171, and a nut 173 disposed on the screw rod 172. Figure 1 and Figure 4As shown, the nut 173 can move horizontally along the screw rod 172 to drive the reflector cup 142 to move toward or away from the light distribution lens 13 (ie, the reflector cup 142 can move back and forth inside the reflector 141) to achieve the purpose of focusing. Figure 4 As shown, the nut 173 is engaged with the engaging position 1421 a of the cup holder 1421 of the reflective cup 142 , thereby pushing the reflective cup 142 to move.

[0048] like Figure 1 As shown, a dust filter 113 is provided at the air inlet 114 of the housing 12. The dust filter 113 is sized to cover the air inlet 114, so that all air entering the housing 12 is filtered through the dust filter 113, effectively preventing dust from entering and adhering to the lamp tube 143, thereby creating black spots and affecting the light distribution effect. The dust filter 113 is detachably connected to the housing 12 for easy replacement or cleaning. For example, the dust filter 113 can be fixed to the housing 12 using a snap-fit ​​connection.

[0049] A silicone sleeve 112 is provided on the four sides of the fan 11 to reduce the vibration of the fan 11 and reduce the noise generated by the fan 11 itself when the flash lamp 100 moves.

[0050] A heat sink 111 is further provided in the housing 12 for dissipating heat from the LED lamp.

[0051] The fan 11 can be a variable speed fan. The controller arranged on the lamp head PCB board controls the speed of the fan 11 according to the number of times the flash lamp 100 flashes. In this way, the speed of the fan 11 can be controlled according to the temperature changes in the shell 12 to ensure that the temperature in the shell 12 is maintained within a normal range.

[0052] The flashlight 100 also includes a diffuser lens 16, which is located at the light outlet of the housing 12 and closes the light outlet. The light distribution lens 13 and the diffuser lens 16 are connected to the housing 12 by a frame 19. Specifically, a plurality of engaging holes 161 are provided at intervals on the peripheral edge of the diffuser lens 16, and a plurality of engaging holes 131 are also provided at intervals on the peripheral edge of the light distribution lens 13. Correspondingly, the frame 19 is provided with a through hole 191. A flange 127 is provided at the light outlet of the housing 12, and engaging protrusions 126 are provided at intervals on the flange 127. The bolt 20 passes through the through hole 191 of the frame 19, the engaging hole 161 of the diffuser lens 16, and the engaging hole 131 of the light distribution lens 13, and cooperates with the engaging protrusion 126 of the housing 12 to fix the light distribution lens 13 and the diffuser lens 16 to the housing 12.

[0053] Optionally, the light distribution lens 13 may be a Fresnel lens.

[0054] A control circuit board is provided inside the main body 30 , and a hot shoe 35 is provided at the bottom thereof, through which an electrical signal connection can be established with a camera or other imaging device.

[0055] The above are only preferred embodiments of the present invention and do not limit the scope of protection of the present invention. Any equivalent structural changes made using the contents of the present invention description and drawings are included in the scope of protection of the present invention.

Claims

1. A flash lamp for photographic lighting, characterized in that: include: main body; and A lamp holder, which is movably connected to the main body via a rotating shaft, and the lamp holder includes: A housing having an accommodating cavity formed therein, one end of the housing being connected to the rotating shaft, the other end of the housing away from the rotating shaft having a light outlet, and an air inlet being formed at the bottom of the housing; a lamp tube assembly, which is disposed in the accommodating cavity of the housing; a light distribution lens, which is arranged opposite to the lamp tube assembly and located at the light outlet of the housing; and a fan installed in the accommodating cavity of the housing and located below the lamp tube assembly, with the air inlet facing the fan and the air outlet of the fan facing the light distribution lens and the lamp tube assembly; The lamp tube assembly comprises: a reflector fixed in the accommodating cavity of the housing, the reflector comprising a main cavity and a sub-cavity formed below the main cavity, the fan being installed in the sub-cavity; a guide rail mounted on the top of the reflector; a reflective cup located in the inner cavity of the reflector, comprising a cup holder and a cup body connected below the cup holder, wherein the cup holder is mounted on the guide rail so that the reflective cup can move along the guide rail, and the opening of the cup body faces the light distribution lens; and a lamp mounted in the cup body, wherein light emitted by the lamp is emitted toward the light distribution lens through the opening of the cup body.

2. The flash lamp according to claim 1, wherein A ventilation gap for discharging hot air is formed between the shell and the rotating shaft. A ventilation opening is provided at one end of the shell connected to the rotating shaft. The ventilation gap is connected to the accommodating cavity in the shell through the ventilation opening.

3. The flash lamp according to claim 2, wherein: The shell includes an upper shell and a lower shell, the upper shell and the lower shell form the accommodating cavity, the fan is located on the inner side of the lower shell, an air duct is formed in the accommodating cavity, the air duct extends from the lower shell to the upper shell and is connected with the ventilation gap through the vent.

4. The flash lamp according to claim 1, wherein The sub-cavity is arranged to be tilted relative to the main cavity, which limits the installation direction of the fan so that the air outlet of the fan faces the lamp tube and the light distribution lens.

5. The flash lamp according to claim 1, wherein The inner side surface of the reflector is a high-gloss surface that can cause diffuse reflection of light; The inner side surface of the cup body is a reflective mirror surface, and the cup body is formed by stamping of sheet metal.

6. The flash lamp according to claim 1, wherein The flash lamp further comprises a motor module fixed in the accommodating cavity of the housing. The motor module is connected to the cup holder of the reflective cup and can drive the reflective cup to move towards or away from the light distribution lens.

7. The flash lamp according to claim 1, wherein The fan is provided with silica gel sleeves on the four sides for reducing vibration and noise.

8. The flash lamp according to claim 1, wherein A dust-proof filter is detachably mounted at the air inlet, and covers the air inlet.

9. The flash lamp according to claim 1, wherein The flash lamp further includes a diffusion lens, which is located at the light outlet of the housing and closes the light outlet; The light-distributing lens is a Fresnel lens.

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