Waterproof flashlight

Abstract

This invention belongs to the field of flashlight technology and discloses a waterproof flashlight, characterized by comprising: a lamp head body, a light-emitting unit, a lamp head middle plate, a heat sink, a fan, and a power supply unit; one side of the lamp head middle plate is connected to and seals the bottom of the lamp head body, and the lamp head middle plate has a through hole communicating with the interior of the lamp head body; one side of the heat sink is connected to the other side of the lamp head middle plate and seals the through hole; the light-emitting unit is mounted on the heat sink and faces the through hole; the power supply unit is connected to the other side of the heat sink; and the fan is arranged between the heat sink and the power supply unit; the power supply unit is electrically connected to a main board inside the lamp head body via wires, and the main board is electrically connected to the light-emitting unit and the fan via wires. Because the light-emitting unit is sealed inside the lamp head body, the flashlight achieves excellent waterproof performance.

Description

Technical Field

[0001] This invention relates to the field of flashlight technology, and more particularly to a waterproof flashlight. Background Technology

[0002] Currently, flashlight cooling methods are mainly divided into passive cooling and active cooling. Low-power flashlights generate less heat from the bulb and can be cooled passively, which relies on heat conduction to the heat sink. High-power flashlights, on the other hand, generate more heat and require active cooling. Active cooling relies on a fan to blow air onto the heat sink to increase airflow and thus accelerate heat dissipation.

[0003] Active cooling, due to the addition of a fan, requires both intake and exhaust channels for effective heat dissipation. However, these channels make it difficult to waterproof the active cooling structure of a flashlight, resulting in the current market lacking a completely waterproof seal for this type of flashlight. Summary of the Invention

[0004] In view of this, the present invention provides a waterproof flashlight to solve one of the problems of existing flashlights that require active heat dissipation, where the active heat dissipation structure cannot be waterproofed.

[0005] To achieve one or more of the above objectives or other objectives, the present invention provides a waterproof flashlight, comprising: a lamp head body, a light-emitting unit, a lamp head middle plate, a heat sink, a fan, and a power supply unit;

[0006] The lamp head middle plate is connected to and seals the bottom of the lamp head body on one side. The lamp head middle plate is provided with a through hole that communicates with the interior of the lamp head body. The heat sink is connected to the other side of the lamp head middle plate on one side and seals the through hole. The light-emitting unit is mounted on the heat sink and is opposite to the through hole. The power supply unit is connected to the other side of the heat sink. The fan is arranged between the heat sink and the power supply unit.

[0007] The power supply unit is electrically connected to the main board inside the lamp holder body via wires, and the main board is electrically connected to the light-emitting unit and the fan via wires.

[0008] Furthermore, the heat sink has a first groove, and the sidewall of the first groove is connected with a plurality of alternating fins. The plurality of fins surround the bottom outside of the first groove to form a second groove. The first groove is opposite to the through hole. The light-emitting unit is installed in the first groove, and a first air duct is formed between the power supply unit and the heat sink to communicate with the second groove. The alternating fins form the second air duct. The fan is installed in the second groove.

[0009] Furthermore, the lamp head plate is provided with a first wire hole, and the wire connecting the power supply unit and the main board passes through the fins of the heat sink and the first wire hole in sequence, and the first wire hole is sealed.

[0010] Furthermore, the lamp head plate is provided with a second wire hole, and the side wall of the first groove is provided with a third wire hole. The wire connecting the main board and the fan passes through the second wire hole and the third wire hole in sequence, and the second wire hole and the third wire hole are sealed.

[0011] Furthermore, the waterproof flashlight also includes a heat dissipation base plate, which has a perforated structure in the middle. The heat dissipation base plate is connected to the heat sink on one side, and the perforated structure is opposite to the second groove. The other side of the heat dissipation base plate is provided with a plurality of alternating legs, which are connected to the power supply unit. The first air duct is formed by the power supply unit and the heat dissipation base plate, and the air vents of the first air duct are formed at the intervals between adjacent legs.

[0012] Furthermore, the porous structure is a mesh.

[0013] Furthermore, all of the fins are higher than the sidewall of the first groove, and a sealing gasket is provided on the top of the sidewall of the first groove. The connection between the lamp head plate and the first groove is sealed by the sealing gasket.

[0014] Furthermore, the lamp head body includes: a lamp head housing and a focusing ring;

[0015] The focusing ring is equipped with a lens, and the lens is sealed to the focusing ring through a lens sealing ring.

[0016] The lamp head housing is cylindrical, the focusing ring is located on the top of the lamp head housing and is sealed by the focusing sealing ring, and the lamp head middle plate is connected to the bottom of the lamp head housing and is sealed by the middle plate sealing ring.

[0017] Furthermore, the lamp holder body also includes: a control panel with various functional components and a waterproof cover;

[0018] A panel base is provided on the side wall of the lamp holder housing. The panel base has multiple functional holes and multiple mounting holes. The control panel is connected to the mounting holes by screws. The functional elements are opposite to the corresponding functional holes.

[0019] The waterproof cover and the panel base are detachably and sealed together.

[0020] Furthermore, the functional element includes at least a display screen, a charging port, and at least one button; the functional hole includes at least a display hole, a charging hole, and a button hole;

[0021] The panel base is provided with a first functional slot and a second functional slot, the display hole and the button hole are located in the first functional slot, and the charging hole is located in the second functional slot;

[0022] The waterproof cover plate includes a fixed cover area and a movable cover area. The fixed cover area is provided with a ring of sealing ribs and sealing protrusions, and the movable cover area is provided with a sealing protrusion.

[0023] The fixed cover area is sealed to the first functional slot and the sealing rib seals the opening of the first functional slot; the movable cover area is detachably sealed to the second functional slot and the sealing ring seals the charging interface; the waterproof cover plate is at least made of a light-transmitting material for the portion corresponding to the display screen.

[0024] Furthermore, the power supply unit includes a battery compartment housing, a battery compartment top cover, and a battery compartment bottom cover. The battery compartment housing contains a rechargeable battery, and the battery compartment top cover and the battery compartment bottom cover are both sealed by a cover sealing ring.

[0025] The battery compartment cover is provided with a fourth wire hole. The battery is electrically connected to the main board inside the lamp head body through a wire. The wire passes through the fourth wire hole and the fourth wire hole is sealed.

[0026] Implementing the embodiments of the present invention will have the following beneficial effects:

[0027] With the above-mentioned waterproof flashlight, since the heat sink has two opposing first and second grooves, the light-emitting unit is sealed inside the first groove. After the heat sink, the lamp head plate and the lamp head body are connected, the inside of the first groove is sealed from the outside. The fan is a completely waterproof fan, that is, the heat sink and its related connecting parts will not be at risk of water ingress. Therefore, the flashlight can achieve a very good waterproof effect. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] in:

[0030] Figure 1 This is a schematic diagram of the structure of a waterproof flashlight in one embodiment of the present invention;

[0031] Figure 2 for Figure 1 Another perspective;

[0032] Figure 3This is a schematic diagram of the heat sink structure in one embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the lamp holder plate in one embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the heat dissipation base plate in one embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the control panel structure in one embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of a waterproof cover plate in one embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the lamp holder housing in one embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the structure of the lamp holder housing in another embodiment of the present invention;

[0039] Figure 10 This is a schematic diagram of the structure of a waterproof flashlight in another embodiment of the present invention.

[0040] Figure label:

[0041] 1. Lamp head body; 11. Lamp head housing; 12. Focusing ring; 121. Lens; 1211. Lens sealing ring; 122. Focusing sealing ring; 13. Control panel; 131. Display screen; 132. Charging interface; 133. Button; 134. USB interface; 14. Waterproof cover; 141. Fixed cover area; 1411. Sealing rib; 1412. Sealing protrusion; 142. Movable cover area; 1421. Sealing protrusion; 15. Panel base; 151. First function slot; 152. Second function slot; 16. Function hole; 161. Display hole; 162. Charging hole; 163. Button hole; 164. USB hole; 17. Mounting hole;

[0042] 2. Light-emitting unit;

[0043] 3. Lamp holder middle plate; 31. Through hole; 32. First wire hole; 33. Second wire hole; 34. Middle plate sealing ring;

[0044] 4. Heat sink; 41. First groove; 411. Third wire hole; 42. Fin; 43. Second groove;

[0045] 5. Fan;

[0046] 6. Power supply unit; 61. Battery compartment housing; 62. Battery compartment top cover; 621. Fourth wire hole; 63. Battery compartment bottom cover; 64. Compartment cover sealing ring;

[0047] 7. Wires;

[0048] 8. Heat dissipation base plate; 81. Perforated structure; 82. Support legs;

[0049] 9. Handle. Detailed Implementation

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects and not to describe a particular order.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0053] Reference Figures 1 to 10 This application proposes a waterproof flashlight, comprising: a lamp head body 1, a light-emitting unit 2, a lamp head middle plate 3, a heat sink 4, a fan 5, and a power supply unit 6;

[0054] The lamp holder middle plate 3 is connected to and seals the bottom of the lamp holder body 1 on one side. The lamp holder middle plate 3 is provided with a through hole that connects to the inside of the lamp holder body 1. The heat sink 4 is connected to the other side of the lamp holder middle plate 3 on one side and seals the through hole 31. The light-emitting unit 2 is installed on the heat sink 4 and is opposite to the through hole 31. The power supply part 6 is connected to the other side of the heat sink 4. The fan 5 is arranged between the heat sink 4 and the power supply part 6.

[0055] The power supply unit 6 is electrically connected to the main board inside the lamp holder body 1 via wire 7. The main board is electrically connected to the light-emitting unit 2 and the fan 5 via wire 7.

[0056] In this embodiment, the heat sink 4 is a heat sink 4 with no connection between the middle of the two sides. This ensures that the lamp head body 1 is completely sealed after the lamp head plate 3, the lamp head body 1, and the heat sink 4 are connected. During assembly, the light-emitting unit 2 (e.g., LED beads) can be mounted on the heat sink 4. Since the light-emitting unit 2 is inside the lamp head body 1, there is no risk of water ingress, thus the flashlight achieves excellent waterproofing. During use, the light-emitting unit 2 generates heat, which is conducted to the heat sink 4. After the fan 5 is activated, it blows heat away from the heat sink, thus dissipating heat from the light-emitting unit 2.

[0057] In one embodiment, the heat sink 4 has a first groove 41, and a plurality of alternating fins 42 are connected to the sidewall of the first groove 41. The plurality of fins 42 surround the bottom outer side of the first groove 41 to form a second groove 43. One side of the lamp head plate 3 is connected to and seals the bottom of the lamp head body 1. The lamp head plate 3 is provided with a through hole 31 that communicates with the interior of the lamp head body 1. One side of the heat sink 4 is connected to the other side of the lamp head plate 3 and seals the through hole 31. The first groove 41 is opposite to the through hole 31. The light-emitting unit 2 is installed in the first groove 41, and a first air duct that communicates with the second groove 43 is formed between the power supply unit 6 and the heat sink 4. The alternating fins 42 form the second air duct. The fan 5 is installed in the second groove 43.

[0058] In this embodiment, the heat sink 4 is provided with two opposing grooves. One groove, the first groove 41, is completely sealed, and the other groove, the second groove 43, is surrounded by fins 42. During assembly, the light-emitting unit 2 (e.g., LED beads) can be sealed in the first groove 41. Since the heat sink 4, the lamp head plate 3, and the lamp head body 1 are connected, the inside of the first groove 41 is sealed from the outside. The fan 5 is a completely waterproof fan 5, which can be used even when submerged in water and can be purchased directly. With this configuration, the heat sink 4 and its related connecting parts will not be at risk of water ingress, thus the flashlight can achieve a very good waterproof effect. In use, the heat-emitting unit 2 generates heat and conducts it to the heat sink 4. After the fan 5 is started, cool air enters through the first air duct, that is, the part connecting the power supply unit 6 and the heat sink 4 to the second groove 43, and then blows out from the second air duct, that is, blows out from the space between the fins 42, thereby carrying away heat and achieving heat dissipation for the light-emitting unit 2.

[0059] Reference Figure 4 In one embodiment, the lamp holder plate 3 is provided with a first wire hole 32, and the wire 7 connecting the power supply unit 6 and the main board passes through the fins 42 of the heat sink 4 and the first wire hole 32 in sequence, and the first wire hole 32 is sealed.

[0060] In this embodiment, the first wire hole 32 can be sealed by a silicone ring, silicone gasket, or hot melt adhesive.

[0061] Refer again Figure 4 In one embodiment, the lamp head plate 3 is provided with a second wire hole 33, and the side wall of the first groove 41 is provided with a third wire hole 411. The wire 7 connecting the main board and the fan 5 passes through the second wire hole 33 and the third wire hole 411 in sequence, and the second wire hole 33 and the third wire hole 411 are sealed.

[0062] In this embodiment, the difference from the previous embodiment is that, in the previous embodiment, the wire 7 connecting the motherboard and the fan 5 could first pass through the lamp holder plate 3 and then through the interlacing fins 42 of the heat sink 4, without needing to provide a wire hole on the side wall of the first groove 41. In this embodiment, the side wall of the first groove 41 is provided with a third wire hole 411, resulting in a more harmonious overall appearance. During use, the waterproof effect is essentially the same for both embodiments.

[0063] Reference Figure 5 In one embodiment, the waterproof flashlight further includes a heat dissipation base plate 8. The heat dissipation base plate 8 has a perforated structure 81 in the middle. A heat sink 4 is connected to one side of the heat dissipation base plate 8. The perforated structure 81 is opposite to the second groove 43. A plurality of alternating support legs 82 are provided on the other side of the heat dissipation base plate 8. The plurality of support legs 82 are connected to the power supply unit 6. The first air duct is formed by the power supply unit 6 and the heat dissipation base plate 8. The vents of the first air duct are formed at the intervals between adjacent support legs 82. The perforated structure 81 is a mesh.

[0064] In this embodiment, the heat dissipation base plate 8 is connected to the power supply unit 6 by setting support legs 82, so that the gap between adjacent support legs 82 forms the air vent of the first air duct. This air vent is connected to the slot of the second groove 43, and together with the air outlet duct, they form a complete heat dissipation air duct. In this way, cold air enters from the air vent and is blown out from the gap between the fins 42, and the heat on the fins 42 is carried away by the air flow.

[0065] Reference Figure 3 In one embodiment, multiple fins 42 are higher than the sidewall of the first groove 41, and a sealing gasket is provided on the top of the sidewall of the first groove 41. The connection between the lamp holder plate 3 and the first groove 41 is sealed by the sealing gasket.

[0066] In this embodiment, multiple fins 42 are all higher than the sidewall of the first groove 41, and a sealing gasket is placed inside. During assembly, the sealing gasket will not be squeezed or misaligned. Specifically, in conjunction with the above embodiment, the sealing gasket has a corresponding wire hole at the position corresponding to the third wire hole 411.

[0067] Reference Figure 1 and Figure 2 In one embodiment, the lamp head body 1 includes: a lamp head housing 11 and a focusing ring 12;

[0068] A lens 121 is provided on the focusing ring 12, and the lens 121 is sealed to the focusing ring 12 through a lens sealing ring 1211.

[0069] The lamp head housing 11 is cylindrical, the focusing ring 12 is located on the top of the lamp head housing 11 and is sealed by the focusing sealing ring 122, and the lamp head middle plate 3 is connected to the bottom of the lamp head housing 11 and is sealed by the middle plate sealing ring 34.

[0070] In this embodiment, a lens sealing ring 1211 is provided at the connection between the lens 121 and the focusing ring 12, a focusing sealing ring 122 is provided at the connection between the focusing ring 12 and the lamp head housing 11, and a middle plate sealing ring 34 is provided at the connection between the lamp head middle plate 3 and the lamp head housing 11, so as to prevent water from entering these connections.

[0071] Reference Figures 6 to 9 In one embodiment, the lamp holder body 1 further includes: a control panel 13 with multiple functional elements and a waterproof cover 14;

[0072] A panel base 15 is provided on the side wall of the lamp holder housing 11. The panel base 15 is provided with multiple functional holes 16 and multiple mounting holes 17. The control panel 13 is connected to the mounting holes 17 by screws. The functional elements are opposite to the corresponding functional holes 16.

[0073] The waterproof cover plate 14 and the panel seat 15 are detachably and sealed together.

[0074] The functional elements include at least a display screen 131, a charging port 132, and at least one button 133; the functional hole 16 includes at least a display hole 161, a charging hole 162, and a button hole 163; for example, it may also include a USB hole 164.

[0075] The panel base 15 is provided with a first function slot 151 and a second function slot 152. The display hole 161 and the button hole 163 are located in the first function slot 151, and the charging hole 162 is located in the second function slot 152.

[0076] Waterproof cover plate 14 includes a fixed cover area 141 and a movable cover area 142. The fixed cover area 141 is provided with a sealing rib 1411 and a sealing protrusion 1412, and the movable cover area 142 is provided with a sealing protrusion 1421.

[0077] The fixed cover area 141 is sealed to the first functional groove 151 and the sealing rib 1411 seals the opening of the first functional groove 151; the movable cover area 142 is detachably sealed to the second functional groove 152 and the sealing ring 1421 seals the charging interface 132; the waterproof cover plate 14 is at least the part corresponding to the display screen 131 is made of light-transmitting material.

[0078] In this embodiment, in conjunction with the foregoing embodiments, the motherboard and control panel can be the same circuit board or two different circuit boards. Functional components may include a display screen 131, a charging port 132, one or more buttons 133, and a USB port 134. For example, the display screen 131 can show brightness levels, display colors, remaining battery power, etc.; the charging port 132 can be used for charging; the buttons 133 can adjust brightness, adjust light color, etc.; and the USB port 134 can be used to charge a mobile phone, acting as a power bank. For example, when fishing, if the phone's battery is low, the flashlight can charge the phone. Furthermore, a sealing ring can be provided around the display screen 131, charging port 132, and USB port 134 to enhance waterproofing. The aforementioned panel base 15 is provided with a first functional slot 151 and a second functional slot 152, which are sealed by a waterproof cover plate 14. The first functional slot 151 is used to house functional components that can be used without opening the waterproof cover plate 14, such as the display screen 131 and buttons 133, which are sealed by a fixed cover area 141. The second functional slot 152 is used to house functional components that require opening the waterproof cover plate 14 to be used, such as the charging interface 132 and USB interface 134, which are sealed by a movable cover area 142. It is worth noting that the waterproof cover plate 14 and the panel base 15 are sealed together to achieve a primary seal, while the fixed cover area 141 has a sealing rib 1411 that seals the opening of the first functional slot 151, achieving a secondary seal and significantly enhancing waterproof performance. Similarly, the sealing ring 1421 seals the charging interface 132, achieving a secondary seal and further enhancing waterproof performance.

[0079] In one embodiment, the power supply unit 6 includes a battery compartment housing 61, a battery compartment top cover 62, and a battery compartment bottom cover 63. The battery compartment housing 61 contains a rechargeable battery, and the battery compartment top cover 62 and the battery compartment bottom cover 63 are both sealed by a cover sealing ring 64.

[0080] The battery compartment cover 62 is provided with a fourth wire hole 621. The battery is electrically connected to the main board inside the lamp holder body 1 through a wire 7. The wire 7 passes through the fourth wire hole 621 and the fourth wire hole 621 is sealed.

[0081] In this embodiment, the power supply unit 6 is set separately, that is, the battery is not placed inside the lamp head body 1, to avoid the internal temperature of the lamp head rising during use, which would accelerate battery aging and affect battery life. The power supply unit 6 realizes the installation and sealing of the battery through the battery compartment shell 61, the battery compartment top cover 62, and the battery compartment bottom cover 63. Both the battery compartment top cover 62 and the battery compartment bottom cover 63 are sealed by the compartment cover sealing ring 64 to enhance waterproof performance.

[0082] Additionally, for ease of carrying, a handle 9 can be connected between the battery compartment housing 61 and the lamp head housing 11, such as... Figure 10 As shown.

[0083] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A waterproof flashlight, characterized by, include: The lamp holder body, light-emitting unit, lamp holder middle plate, heat sink, fan, and power supply unit; The lamp head middle plate is connected to and seals the bottom of the lamp head body on one side. The lamp head middle plate is provided with a through hole that communicates with the interior of the lamp head body. The heat sink is connected to the other side of the lamp head middle plate on one side and seals the through hole. The light-emitting unit is mounted on the heat sink and is opposite to the through hole. The power supply unit is connected to the other side of the heat sink. The fan is arranged between the heat sink and the power supply unit. The power supply unit is electrically connected to the main board inside the lamp holder body via wires, and the main board is electrically connected to the light-emitting unit and the fan via wires. The heat sink has a first groove, and multiple alternating fins are connected to the sidewall of the first groove. The multiple fins surround the bottom outside of the first groove to form a second groove. The first groove is opposite to the through hole. The light-emitting unit is installed in the first groove, and a first air duct connecting the power supply unit and the heat sink is formed between them, which is a second air duct at the alternating fins. The fan is installed in the second groove. The multiple fins are all higher than the sidewall of the first groove, and a sealing gasket is provided on the top of the sidewall of the first groove. The connection between the lamp head plate and the first groove is sealed by the sealing gasket. The waterproof flashlight also includes a heat dissipation base plate, which has a perforated structure in the middle. The heat dissipation base plate is connected to the heat dissipation fin on one side, and the perforated structure is opposite to the second groove. The other side of the heat dissipation base plate is provided with a plurality of alternating support legs, which are connected to the power supply unit. The first air duct is formed by the power supply unit and the heat dissipation base plate, and the air vents of the first air duct are formed at the intervals between adjacent support legs. The porous structure is a mesh.

2. The waterproof flashlight of claim 1, wherein, The lamp head plate has a first wire hole. The wire connecting the power supply unit and the main board passes through the fins of the heat sink and the first wire hole in sequence, and the first wire hole is sealed.

3. The waterproof flashlight according to claim 1, characterized in that, The lamp head plate is provided with a second wire hole, and the side wall of the first groove is provided with a third wire hole. The wire connecting the main board and the fan passes through the second wire hole and the third wire hole in sequence, and the second wire hole and the third wire hole are sealed.

4. The waterproof flashlight according to claim 1, characterized in that, The lamp head body includes: a lamp head housing and a focusing ring; The focusing ring is equipped with a lens, and the lens is sealed to the focusing ring through a lens sealing ring. The lamp head housing is cylindrical, the focusing ring is located on the top of the lamp head housing and is sealed by the focusing sealing ring, and the lamp head middle plate is connected to the bottom of the lamp head housing and is sealed by the middle plate sealing ring.

5. The waterproof flashlight of claim 4, wherein, The lamp holder body also includes: a control panel with multiple functional components and a waterproof cover; A panel base is provided on the side wall of the lamp holder housing. The panel base has multiple functional holes and multiple mounting holes. The control panel is connected to the mounting holes by screws. The functional elements are opposite to the corresponding functional holes. The waterproof cover and the panel base are detachably and sealed together.

6. The waterproof flashlight of claim 5, wherein, The functional element includes at least a display screen, a charging interface, and at least one button; the functional hole includes at least a display hole, a charging hole, and a button hole; The panel base is provided with a first functional slot and a second functional slot, the display hole and the button hole are located in the first functional slot, and the charging hole is located in the second functional slot; The waterproof cover plate includes a fixed cover area and a movable cover area. The fixed cover area is provided with a ring of sealing ribs and sealing protrusions, and the movable cover area is provided with a sealing protrusion. The fixed cover area is sealed to the first functional slot and the sealing rib seals the opening of the first functional slot; the movable cover area is detachably sealed to the second functional slot and the sealing ring seals the charging interface; the waterproof cover plate is at least made of a light-transmitting material for the portion corresponding to the display screen.

7. The waterproof flashlight of claim 1, wherein, The power supply unit includes a battery compartment housing, a battery compartment top cover, and a battery compartment bottom cover. The battery compartment housing contains a rechargeable battery, and the battery compartment top cover and battery compartment bottom cover are both sealed by a cover sealing ring. The battery compartment cover is provided with a fourth wire hole. The battery is electrically connected to the main board inside the lamp head body through a wire. The wire passes through the fourth wire hole and the fourth wire hole is sealed.

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