Light supplement lamp system and fire detector

Abstract

The utility model belongs to the technical field of fire detectors, and discloses a fill-in light system and a fire detector, the fill-in light system comprises a fill-in light shell and a fill-in light assembly, the fill-in light shell is detachably connected to a camera shell of the fire detector, the fill-in light shell is provided with a mounting cavity, one end of the fill-in light shell is provided with a dismounting port, and the other end of the fill-in light shell is provided with a mounting hole. A first light through hole communicated with the outside atmosphere and the mounting cavity is formed in the other end of the mounting cavity; the light supplementing lamp assembly is detachably installed on the light supplementing lamp shell, a light passing channel is defined by the light supplementing lamp assembly and the light supplementing lamp shell, a camera of the fire detector can collect images outside the light supplementing lamp shell through the light passing channel, and the light supplementing lamp assembly is used for conducting light supplementing on the camera. The light supplement lamp shell is detachably connected to the camera shell, the light supplement lamp shell and the camera shell are independently installed, the light supplement lamp shell and the camera shell do not need to be disassembled at the same time, disassembly is easy, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of fire detectors, in particular to a fill light system and a fire detector. Background Art

[0002] Fire detectors are surveillance devices that detect open flames and are suitable for use in factories, large warehouses, commercial buildings, and large public spaces. The fill light system on fire detectors, as auxiliary lighting equipment, plays an indispensable role in fire warning systems. However, existing fire detectors integrate the fill light assembly with functional components such as the camera within the same housing. During subsequent repairs, disassembling the fill light assembly requires first removing the camera and then the fill light assembly, significantly reducing fire detector maintenance efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a fill light system and a fire detector, which are easy to disassemble and maintain.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] Fill light system, including:

[0006] A fill light housing is used for detachably connecting to the camera housing of the fire detector, the fill light housing having an installation chamber, a disassembly port at one end of the fill light housing, and a first light hole connecting the outside atmosphere and the installation chamber at the other end;

[0007] A fill light assembly, which can be detachably installed on the fill light housing after entering the installation chamber through the disassembly and assembly port. The fill light assembly and the fill light housing form a light passage. The first light hole, the light passage and the disassembly and assembly port are connected in sequence along the axial direction of the first light hole to form a light passage, which is used to enable the camera of the fire detector to capture images outside the fill light housing through the light passage. The fill light assembly is used to provide fill light for the camera.

[0008] Optionally, the fill light assembly includes a mounting plate, and a fill light mounted on the mounting plate;

[0009] The fill light housing has a first housing wall with the first light hole, the first housing wall is provided with a lamp mounting through hole, and the light emitting end of the fill light passes through the lamp mounting through hole and out of the fill light housing;

[0010] A mounting protrusion is provided in the housing of the fill light, and the mounting plate is fastened to the mounting protrusion.

[0011] Optionally, the fill light system further includes a light intensity detection element, and the power of the fill light is adjustable;

[0012] The first shell wall is provided with a resistance through hole, the light intensity detection element is mounted on the mounting plate, and the photosensitive portion of the light intensity detection element is exposed to the external environment through the resistance through hole.

[0013] Optionally, the fill light assembly further includes a circuit board electrically connected to the fill light, and the inner wall of the fill light housing is provided with two fixing protrusions spaced apart along the first direction, the fixing protrusions are provided with a card slot, and the card slots on the two fixing protrusions are opened in the first direction and arranged opposite to each other;

[0014] The two ends of the circuit board in the first direction are inserted into the card slots of the two fixing protrusions in a one-to-one correspondence along the second direction. The circuit board is clamped between the bottom walls of the two card slots along the first direction and between the opposite side walls of the card slot along the third direction. One end of the circuit board in the second direction abuts against the mounting plate.

[0015] Optionally, the fill light housing is provided with a heat dissipation hole, and the heat dissipation hole is connected to the installation chamber and the outside atmosphere.

[0016] Optionally, the fill light and the circuit board are located on opposite sides of the mounting plate, and the heat dissipation hole and the circuit board are located on the same side of the mounting plate.

[0017] Optionally, the mounting plate is provided with an avoidance groove extending through the second direction for avoiding the fixing protrusion.

[0018] Optionally, the first shell wall is provided with an indicating installation through hole, the installation chamber includes a first chamber, and the installation protrusion forms the first chamber between the first shell wall and the installation plate;

[0019] The fill light system also includes a status indicator light for indicating the working status of the fire detector. One end of the status indicator light is located in the first chamber and is firmly mounted on the first shell wall, and the other end is passed through the indication mounting through hole.

[0020] Optionally, a plurality of ear plates are arranged at intervals along the circumferential direction at one end of the fill light housing, and the ear plates and the disassembly port are located at the same end of the fill light housing;

[0021] A through hole is provided on the ear plate for passing a fastener to connect the fill light housing to the camera housing of the fire detector.

[0022] The fire detector includes a camera housing, a camera installed in the camera housing, and a fill light system. One end of the fill light housing where the disassembly port is provided can be detachably installed on the camera housing, and light outside the fill light housing can enter the camera through the light passage.

[0023] Beneficial effects of the utility model:

[0024] The fill light system and fire detector provided by the present invention have a fill light housing detachably connected to a camera housing, and a fill light assembly detachably installed in the fill light housing. When the fill light assembly needs to be disassembled, it is only necessary to remove the fill light housing from the camera housing and then remove the fill light assembly from the fill light housing, without disassembling the camera, thereby improving the convenience of disassembling the fill light assembly.

[0025] The first light hole, the light passage and the disassembly and assembly port are connected in sequence along the axis of the first light hole to form a light passage, so that light in the external environment enters the camera through the light passage, and the camera of the fire detector can collect images outside the fill light housing through the light passage. The fill light assembly can fill light for the camera. There is no need to integrate the camera and the fill light system together, which can also improve the fill light effect of the camera without affecting their respective functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an axonometric diagram of the fill light system provided by the embodiment of the utility model;

[0027] Figure 2 This is a bottom view of the fill light system provided by an embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the connection between the fill light and the mounting plate provided in an embodiment of the present utility model;

[0029] Figure 4 It is a structural schematic diagram of the fill light housing provided by an embodiment of the present utility model.

[0030] In the figure: 1. Fill light housing; 11. First light hole; 12. First housing wall; 13. Mounting protrusion; 14. Heat dissipation hole; 15. Ear plate; 2. Mounting plate; 3. Fill light; 4. Light intensity detection element; 5. Circuit board; 6. Fixing protrusion; 7. Avoidance groove; 8. Status indicator light. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0032] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0035] An embodiment of the utility model provides a fill light system and a fire detector, wherein the fire detector includes a camera housing, a camera installed in the camera housing, and the fill light system.

[0036] like Figure 1-4As shown, the fill light system includes a fill light housing 1 and a fill light assembly. The fill light housing 1 is detachably connected to the camera housing. The fill light housing 1 has an installation chamber. One end of the fill light housing 1 is provided with a disassembly port, and the other end is provided with a first light hole 11 connecting the outside atmosphere and the installation chamber. The fill light assembly can be detachably installed in the fill light housing 1 after entering the installation chamber through the disassembly port. The fill light assembly and the fill light housing 1 form a light passage. The first light hole 11, the light passage and the disassembly port are connected in sequence along the axial direction of the first light hole 11 to form a light passage, which is used to enable the camera of the fire detector to collect images outside the fill light housing 1 through the light passage. The fill light assembly is used to fill light for the camera.

[0037] The fill light housing 1 is detachably connected to the camera housing, and the fill light assembly is detachably installed in the fill light housing 1. When the fill light assembly needs to be disassembled, it is only necessary to remove the fill light housing 1 from the camera housing, and then remove the fill light assembly from the fill light housing 1. There is no need to disassemble the camera, which improves the convenience of disassembling the fill light assembly.

[0038] The first light hole 11, the light passage and the disassembly and assembly port are connected in sequence along the axial direction of the first light hole 11 to form a light passage, so that light in the external environment enters the camera through the light passage, and the camera of the fire detector can collect images outside the fill light housing through the light passage. The fill light assembly can fill light for the camera, and there is no need to integrate the camera and the fill light system together. It can also improve the fill light effect of the camera without affecting their respective functions.

[0039] Exemplarily, the fill light housing 1 is a cylindrical structure with a disassembly opening.

[0040] Furthermore, one end of the fill light housing 1 having a disassembly port is detachably mounted on the camera housing, and light outside the fill light housing 1 can enter the camera through the light passage.

[0041] Exemplarily, the image acquisition end of the camera is arranged facing the optical channel.

[0042] Furthermore, if Figure 3 、 4 As shown, the fill light assembly includes a mounting plate 2 and a fill light 3 mounted on the mounting plate 2. The fill light housing 1 has a first housing wall 12 with a first light hole 11. The first housing wall 12 is provided with a lamp mounting through-hole, through which the light-emitting end of the fill light 3 passes out of the fill light housing 1. The fill light housing 1 is provided with a mounting protrusion 13, and the mounting plate 2 is fastened to the mounting protrusion 13. For example, the first housing wall 12 is the bottom wall of the cylindrical structure, and the mounting protrusion 13 is protruding from the first housing wall 12.

[0043] The fill light 3 is passed through the lamp mounting through hole so that the light-emitting end is exposed on the fill light housing 1, which can improve the fill light effect of the fill light 3. The mounting plate 2 is then fastened to the mounting protrusion 13, so that the fill light 3 and the mounting plate 2 are fixedly mounted on the fill light housing 1. They are not easy to fall off during use, thereby improving the stability of the fill light 3. At the same time, the fastened mounting method is also convenient for disassembly and simple to operate.

[0044] Furthermore, there are multiple mounting protrusions 13, which are arranged at intervals along the circumference of the fill light housing 1. The mounting plate 2 enters the mounting cavity through the disassembly and assembly port and abuts against the mounting protrusions 13, and then the mounting plate 2 is connected to the mounting protrusions 13 by fasteners.

[0045] In other embodiments, the mounting protrusions 13 may be protruded from the inner circumferential wall of the cylindrical structure, and a plurality of mounting protrusions 13 may be evenly distributed along the circumference of the cylindrical structure.

[0046] For example, the first shell wall 12 is provided with four mounting protrusions 13, the mounting plate 2 is provided with mounting holes corresponding to the mounting protrusions 13, and the mounting protrusions 13 are provided with threaded holes, and the fasteners pass through the mounting holes and are threadedly connected to the threaded holes.

[0047] Further, see Figure 1 The fill light assembly also includes a circuit board 5 electrically connected to the fill light 3. The inner wall of the fill light housing 1 is provided with two fixing protrusions 6 arranged at intervals along the first direction. The fixing protrusions 6 are provided with card slots, and the card slots on the two fixing protrusions 6 are opened and arranged opposite to each other along the first direction; the two ends of the circuit board 5 in the first direction are inserted into the card slots of the two fixing protrusions 6 in a one-to-one correspondence along the second direction, the circuit board 5 is clamped between the bottom walls of the two card slots along the first direction, and is clamped between the opposite side walls of the card slot along the third direction; one end of the circuit board 5 in the second direction abuts against the mounting plate 2.

[0048] The circuit board 5 is inserted into the slots of the two fixing protrusions 6, and the bottom walls of the two slots are used to limit the circuit board 5 in the first direction. The opposite side walls of the slots are used to limit the circuit board 5 in the third direction. After the camera housing and the fill light housing 1 are connected, the camera housing is used to press the circuit board 5 against the mounting plate 2 in the second direction, so that the camera housing and the mounting plate 2 limit the circuit board 5 in the second direction. As a result, the circuit board 5 is firmly installed in the fill light housing 1 and is not likely to become detached during operation, thereby affecting the working state of the fill light system. When the staff needs to remove the circuit board 5, they first remove the fill light housing 1 from the camera housing. Since one end of the circuit board 5 in the second direction abuts against the mounting plate 2, the circuit board 5 can be removed by forcibly pulling it out in the direction toward the disassembly opening, thereby completing the removal of the circuit board 5. This is simple to operate and convenient for maintenance.

[0049] For example, the fixing protrusion 6 is protruded from the inner wall of the first shell wall 12, and one end of the fixing protrusion 6 extends along the second direction to the first shell wall 12. In other embodiments, the fixing protrusion 6 and the first shell wall 12 may be spaced apart along the second direction.

[0050] like Figure 1-3 As shown, the first shell wall 12 is provided with two lamp mounting through holes, and two fill lights 3 are arranged at intervals along the light passage on the mounting plate 2. The fill lights 3 are arranged in a one-to-one correspondence with the lamp mounting through holes. The fill lights 3 are passed through the lamp mounting through holes. After the mounting plate 2 passes through the fixed protrusion 6, the side of the mounting plate 2 on which the fill light 3 is mounted abuts against the mounting protrusion 13, and is fastened to the mounting protrusion 13 through the mounting plate 2 by fasteners.

[0051] Furthermore, the fill light housing 1 is provided with a heat dissipation hole 14 , and the heat dissipation hole 14 is communicated with both the installation chamber and the outside atmosphere.

[0052] The circuit board 5 generates a large amount of heat in the installation chamber when in operation. A heat dissipation hole 14 is provided on the fill light housing 1 so that the heat generated by the circuit board 5 in the installation chamber can be promptly transferred to the outside through the heat dissipation hole 14 to achieve heat exchange and ensure that the installation chamber is in a good temperature state.

[0053] Exemplarily, the heat dissipation holes 14 are arranged facing the circuit board 5 so that heat can be transferred to the outside atmosphere through the heat dissipation holes 14 in a timely manner, thereby improving heat exchange efficiency.

[0054] Furthermore, the fill light 3 and the circuit board 5 are located on opposite sides of the mounting plate 2 , and the heat dissipation holes 14 and the circuit board 5 are located on the same side of the mounting plate 2 .

[0055] Since the fill light 3 and the circuit board 5 generate a lot of heat during operation, arranging the fill light 3 and the circuit board 5 on opposite sides of the mounting plate 2 can reduce heat accumulation, thereby avoiding malfunction of the fill light system caused by excessive temperature.

[0056] The heat dissipation holes 14 and the circuit board 5 are located on the same side of the mounting plate 2, so that heat can be transferred to the outside atmosphere through the heat dissipation holes 14 in a timely manner, thereby improving the heat exchange efficiency. It can also reduce the heat transferred through the optical channel to the part of the mounting cavity where the fill light 3 is installed, causing the temperature of the fill light 3 to rise and affecting the working state of the fill light 3.

[0057] Preferably, the mounting plate 2 may be a heat-insulating plate, which can greatly reduce the heat generated by the circuit board 5 in the working state and transfer it to the mounting cavity where the fill light 3 is mounted through the heat-insulating plate, thereby reducing heat accumulation.

[0058] Furthermore, if Figure 3 As shown, the mounting plate 2 is provided with an avoidance groove 7 penetrating along the second direction for avoiding the fixing protrusion 6 .

[0059] Since the fill light 3 and the circuit board 5 are located on opposite sides of the mounting plate 2, when the mounting plate 2 is installed in the fill light housing 1, the mounting plate will pass through the fixing protrusion 6. By setting the avoidance groove 7, the fixing protrusion 6 is passed through the avoidance groove 7 so that the fixing protrusion 6 and the mounting plate 2 will not interfere with each other.

[0060] Exemplarily, the mounting plate 2 is provided with two avoidance grooves 7 , and the two avoidance grooves 7 are provided in a one-to-one correspondence with the two fixing protrusions 6 .

[0061] In other embodiments, a portion of the mounting plate 2 may be cut so that the cut portion forms the avoidance groove 7 , so that the fixing protrusion 6 does not interfere with the mounting plate 2 .

[0062] Furthermore, the first shell wall 12 is provided with an indicator mounting through hole, the mounting chamber includes a first chamber, the mounting protrusion 13 forms a first chamber between the first shell wall 12 and the mounting plate 2, and the fill light system also includes a status indicator light 8 for indicating the working status of the fire detector. One end of the status indicator light 8 is located in the first chamber and is firmly mounted on the first shell wall 12, and the other end is passed through the indicator mounting through hole.

[0063] The mounting protrusion 13 is arranged in the fill light housing 1, and the mounting plate 2 enters the mounting cavity through the disassembly and assembly port and can abut the mounting protrusion 13, so that the mounting protrusion 13 separates the mounting plate 2 and the first shell wall 12, thereby forming a first cavity between the first shell wall 12 and the mounting plate 2.

[0064] During the installation process, first, the status indicator light 8 is passed through the disassembly port into the installation chamber and detachably installed in the fill light housing 1, then the fill light 3 and the mounting plate 2 are detachably installed in the fill light housing 1 through the disassembly port, and finally, the circuit board 5 is passed through the disassembly port and plugged into the fill light housing 1.

[0065] Furthermore, the fill light system also includes an indicator light board, the status indicator light 8 is installed on the indicator light board, the indicator light board is connected to the fill light housing 1 through a lamp fastener, the fill light housing 1 is provided with an indicator light hole extending to the outer wall of the fill light housing 1, and the status indicator light 8 is passed through the indicator light hole.

[0066] The status indicator light 8 is exposed to facilitate people to observe the operating status of the fire detector.

[0067] Furthermore, the fill light system also includes a light intensity detection element 4, the power of the fill light 3 is adjustable, the first shell wall 12 is provided with a resistor through hole, the light intensity detection element 4 is installed on the mounting plate 2, and the photosensitive part of the light intensity detection element 4 is exposed to the external environment through the resistor through hole.

[0068] The light intensity detection element 4 is exposed to the outside environment so that the light in the outside environment can illuminate the light intensity detection element 4. The light intensity detection element 4 senses the light intensity in the outside environment and adjusts the brightness of the fill light 3.

[0069] Preferably, the light intensity detection element 4 may be a photoresistor.

[0070] Furthermore, a plurality of ear plates 15 are arranged at intervals along the circumference of one end of the fill light housing 1. The ear plates 15 and the disassembly and assembly port are located at the same end of the fill light housing 1. A through hole is provided on the ear plate 15 for inserting fasteners to connect the fill light housing 1 to the camera housing of the fire detector. The fasteners are used to fasten the connection, the structure is simple, and disassembly is convenient.

[0071] For example, one end of the fill light housing 1 where the disassembly opening is opened is provided with four ear plates 15 spaced apart along the circumferential direction, and is fastened to the camera housing by fasteners passing through the through holes of the ear plates 15 .

[0072] In other embodiments, the fill light housing 1 and the camera housing can also be threadedly connected. Specifically, one of the fill light housing 1 and the camera housing is provided with an internal thread, and the other is provided with an external thread, and the internal thread is threadedly connected to the external thread.

[0073] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The fill light system is characterized by: include: A fill light housing (1) is used for being detachably connected to a camera housing of a fire detector, the fill light housing (1) having an installation chamber, a disassembly opening being provided at one end of the fill light housing (1), and a first light hole (11) communicating with the outside atmosphere and the installation chamber being provided at the other end; A fill light assembly is provided, wherein the fill light assembly enters the installation chamber through the disassembly opening and is detachably mounted on the fill light housing (1); the fill light assembly and the fill light housing (1) form a light passage; the first light hole (11), the light passage and the disassembly opening are sequentially connected along the axis of the first light hole (11) to form a light passage, which is used to enable a camera of a fire detector to capture images outside the fill light housing (1) through the light passage; and the fill light assembly is used to provide fill light for the camera.

2. The fill light system according to claim 1, characterized in that: The fill light assembly comprises a mounting plate (2) and a fill light (3) mounted on the mounting plate (2); The fill light housing (1) has a first housing wall (12) on which the first light hole (11) is formed, and the first housing wall (12) is provided with a lamp mounting through hole, and the light-emitting end of the fill light (3) passes through the lamp mounting through hole and out of the fill light housing (1); A mounting protrusion (13) is provided in the fill light housing (1), and the mounting plate (2) is fastened to the mounting protrusion (13).

3. The fill light system according to claim 2, characterized in that: The fill light system further comprises a light intensity detection element (4), and the power of the fill light (3) is adjustable; The first shell wall (12) is provided with a resistance through hole, the light intensity detection element (4) is mounted on the mounting plate (2), and the light-sensitive portion of the light intensity detection element (4) is exposed to the external environment through the resistance through hole.

4. The fill light system according to claim 2, characterized in that: The fill light assembly further comprises a circuit board (5) electrically connected to the fill light (3); the inner wall of the fill light housing (1) is provided with two fixing protrusions (6) spaced apart along a first direction; the fixing protrusions (6) are provided with a card slot, and the card slots on the two fixing protrusions (6) are opened in the first direction and arranged opposite to each other; The circuit board (5) is inserted into the slots of the two fixing protrusions (6) in a one-to-one correspondence along the second direction at both ends in the first direction; the circuit board (5) is clamped between the bottom walls of the two slots along the first direction, and is clamped between the opposite side walls of the slot along the third direction; and one end of the circuit board (5) in the second direction abuts against the mounting plate (2).

5. The fill light system according to claim 4, characterized in that: The fill light housing (1) is provided with a heat dissipation hole (14), and the heat dissipation hole (14) is in communication with both the installation chamber and the outside atmosphere.

6. The fill light system according to claim 5, characterized in that: The fill light (3) and the circuit board (5) are located on opposite sides of the mounting plate (2), and the heat dissipation hole (14) and the circuit board (5) are located on the same side of the mounting plate (2).

7. The fill light system according to claim 6, characterized in that: The mounting plate (2) is provided with an avoidance groove (7) extending through the second direction and used for avoiding the fixing protrusion (6).

8. The fill light system according to claim 4, characterized in that: The first shell wall (12) is provided with an indicating installation through hole, the installation chamber includes a first chamber, and the installation protrusion (13) forms the first chamber between the first shell wall (12) and the installation plate (2); The fill light system further comprises a status indicator light (8) for indicating the working status of the fire detector, one end of the status indicator light (8) is located in the first chamber and is fixedly mounted on the first shell wall (12); the other end is passed through the indication mounting through hole.

9. The fill light system according to claim 1, characterized in that: A plurality of ear plates (15) are arranged at intervals along the circumferential direction at one end of the fill light housing (1); the ear plates (15) and the disassembly opening are located at the same end of the fill light housing (1); A through hole is provided on the ear plate (15) for inserting a fastener to connect the fill light housing (1) to the camera housing of the fire detector.

10. Fire detector, characterized in that The invention comprises a camera housing, a camera installed in the camera housing, and a fill light system as described in any one of claims 1 to 9, wherein one end of the fill light housing (1) provided with the disassembly port is detachably installed on the camera housing, and light outside the fill light housing (1) can enter the camera through the light passage.

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