Marine LED explosion-proof emergency light

Abstract

The application provides a marine LED explosion-proof emergency lamp, and relates to the field of marine lamps, which comprises a circuit board, LED lamp beads, a battery, a glass lens, a protective cylinder and a heat conduction assembly, the heat conduction assembly comprises a first heat conduction cylinder, a second heat conduction cylinder and a heat conduction base, the LED lamp beads are located in the first heat conduction cylinder, the battery and the circuit board are located in the second heat conduction cylinder, the LED lamp beads and the battery are connected with the circuit board respectively, the LED lamp beads are located at the front end of the circuit board, the battery is located at the rear end of the circuit board, the second heat conduction cylinder is located at the rear end of the first heat conduction cylinder, the heat conduction base is located at the rear end of the second heat conduction cylinder, the heat conduction base is fixedly connected with the second heat conduction cylinder, the first heat conduction cylinder is fixedly connected with the second heat conduction cylinder, and the heat conduction base is suitable for being detachably fixedly connected with a steel plate or an iron plate of a ship body.

Description

Technical Field

[0001] This application relates to the field of marine lighting technology, and in particular to a marine LED explosion-proof emergency light. Background Technology

[0002] Marine lighting typically includes searchlights, signal lights, illumination lights, and emergency lights. Emergency lights are usually used as backup lights. In the existing technology, emergency lights in the ship's engine room are suspended from the hull and used after other lights are powered off. However, there is oil and gas in the engine room, and the battery and circuit board of the emergency light may heat up during use, posing a risk of igniting the oil and gas and causing an explosion. Therefore, there is a need to develop an LED explosion-proof emergency light. Summary of the Invention

[0003] This application provides a marine LED explosion-proof emergency light to solve the technical problem that the heat generated by the emergency light poses a risk of igniting oil and gas in the engine compartment, leading to an explosion.

[0004] In an embodiment of this application, a marine LED explosion-proof emergency light is provided, comprising a circuit board, LED beads, a battery, a glass lens, a protective cylinder, and a heat-conducting assembly. The heat-conducting assembly includes a first heat-conducting cylinder, a second heat-conducting cylinder, and a heat-conducting base. The LED beads are located inside the first heat-conducting cylinder, and the battery and the circuit board are located inside the second heat-conducting cylinder. The LED beads and the battery are respectively connected to the circuit board. The LED beads are located at the front end of the circuit board, and the battery is located at the rear end of the circuit board. The first and second heat-conducting cylinders are located inside the protective cylinder, with the second heat-conducting cylinder located at the rear end of the first heat-conducting cylinder. The heat-conducting base is located at the rear end of the second heat-conducting cylinder. The heat-conducting base is fixedly connected to the second heat-conducting cylinder, the first heat-conducting cylinder is fixedly connected to the second heat-conducting cylinder, the first heat-conducting cylinder, the second heat-conducting cylinder, and the heat-conducting base are adapted to conduct heat to each other, the first heat-conducting cylinder and the second heat-conducting cylinder are respectively fixedly connected to the protective cylinder, the glass lens is located at the front end of the first heat-conducting cylinder, the glass lens is fixedly connected to the protective cylinder, the first heat-conducting cylinder, the second heat-conducting cylinder, and the heat-conducting base are made of aluminum alloy material, the surfaces of the first heat-conducting cylinder, the second heat-conducting cylinder, and the heat-conducting base are coated with an insulating layer, the protective cylinder is made of plastic or rubber, and the heat-conducting base is adapted to be detachably fixedly connected to the steel plate or iron plate of the hull.

[0005] In some embodiments of this application, a plurality of magnets are embedded and fixedly connected to the rear end face of the heat-conducting base. The rear end face of the magnets is located on the same plane as the rear end face of the heat-conducting base. The magnets are distributed in an equal-angle circular array around the center position of the heat-conducting base. The heat-conducting base is adapted to be fixedly connected to the steel plate or iron plate of the hull by adsorption through the magnets.

[0006] In some embodiments of this application, the heat-conducting base has a notch at its center, and a wireless charging coil is fixedly connected inside the notch. The wireless charging coil is connected to the circuit board.

[0007] In some embodiments of this application, an outer protective plate and an inner protective plate are fixedly connected within the notch. The outer protective plate is located at the rear end of the heat-conducting base, and the inner protective plate is located at the front end of the heat-conducting base. The wireless charging coil is clamped between the outer protective plate and the inner protective plate. The outer protective plate and the inner protective plate are made of plastic.

[0008] In some embodiments of this application, the heat-conducting component further includes a first heat-conducting partition, which is fixedly connected to the circuit board. The first heat-conducting partition is closely attached to the front end of the circuit board and fixedly connected to the rear end of the first heat-conducting cylinder. The first heat-conducting partition has a through hole for the LED beads to pass through. The front end of the LED beads is located on the side of the first heat-conducting partition away from the circuit board. The first heat-conducting partition is made of aluminum alloy and its surface is coated with an insulating layer.

[0009] In some embodiments of this application, the heat-conducting component further includes a second heat-conducting partition, which is fixedly connected to the circuit board and closely abuts the rear end of the circuit board. The second heat-conducting partition is also fixedly connected to the front end of the second heat-conducting cylinder. The battery is fixed at the center of the rear end of the second heat-conducting partition. The second heat-conducting partition is made of aluminum alloy and has an insulating layer coated on its surface.

[0010] In some embodiments of this application, the heat-conducting assembly further includes a plurality of heat-conducting pillars located between the first heat-conducting partition and the second heat-conducting partition. One end of each heat-conducting pillar is fixedly connected to the first heat-conducting partition, and the other end of each heat-conducting pillar is fixedly connected to the second heat-conducting partition. The circuit board has through holes through which the heat-conducting pillars pass. The heat-conducting pillars are made of aluminum alloy and have an insulating layer coated on their surface.

[0011] In some embodiments of this application, the protective cylinder and the glass lens, and the protective cylinder and the heat-conducting base are sealed together by sealant.

[0012] In some embodiments of this application, the inner protective plate and the heat-conducting base, and the outer protective plate and the heat-conducting base are sealed together by sealant.

[0013] In some embodiments of this application, a switch button is fixedly connected to the side wall of the protective cylinder, the outer side of the switch button is sealed to the protective cylinder with sealant, and the switch button is connected to the circuit board through a wire.

[0014] This application has the following beneficial effects:

[0015] The heat-conducting base is fixed to the steel or iron plate of the hull. During the operation of the LED beads, the LED beads, circuit board, and battery generate heat. The heat is conducted through the air to the first heat-conducting cylinder, the second heat-conducting cylinder, and the heat-conducting base. The first and second heat-conducting cylinders then conduct the heat to the heat-conducting base, which in turn conducts the heat to the steel or iron plate of the hull. Due to the thickness and large area of ​​the steel or iron plate of the hull, it can quickly absorb the heat from the heat-conducting base and disperse the heat to other parts and into the air. This ultimately reduces the temperature of the air inside the first and second heat-conducting cylinders, improves the heat dissipation efficiency of the LED beads, circuit board, and battery, helps to avoid localized high temperatures, and reduces the overall temperature of the emergency light. At the same time, the protective cylinder is made of plastic and has a certain degree of heat insulation, preventing the first and second heat-conducting cylinders from being directly exposed to the outside air after being heated. The heat is concentrated and conducted to the steel or iron plate of the hull through the heat-conducting base, which helps to solve the technical problem in the prior art where the heat generated by the emergency light poses a risk of igniting oil and gas in the engine compartment and causing an explosion. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of the marine LED explosion-proof emergency light in the embodiments of this application;

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure of a China Shipbuilding LED explosion-proof emergency light after the glass lens has been removed;

[0019] Figure 3 yes Figure 2 A schematic diagram of the structure of the China Shipbuilding LED Explosion-proof Emergency Light after the protective cylinder has been removed;

[0020] Figure 4 yes Figure 3 A schematic diagram of the structure of the China Shipbuilding LED Explosion-proof Emergency Light after the first and second heat-conducting cylinders have been removed;

[0021] Figure 5 yes Figure 4 A schematic diagram of the structure of the China Shipbuilding LED explosion-proof emergency light after the first heat-conducting partition has been removed;

[0022] Figure 6 This is a schematic diagram of the connection structure between the second heat-conducting partition and the heat-conducting column in an embodiment of this application.

[0023] Figure label:

[0024] 101. Circuit board; 102. LED beads; 103. Battery; 104. Glass lens; 105. Protective cylinder; 106. First heat-conducting cylinder; 107. Second heat-conducting cylinder; 108. Heat-conducting base; 109. Magnet; 110. Notch; 111. Wireless charging coil; 112. Outer protective plate; 113. Inner protective plate; 114. First heat-conducting baffle; 115. Second heat-conducting baffle; 116. Heat-conducting column; 117. Switch button. Detailed Implementation

[0025] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The terminology used in the embodiments section of this application is only used to explain the specific embodiments of this application and is not intended to limit this application.

[0026] like Figures 1 to 4As shown in the embodiments of this application, a marine LED explosion-proof emergency light is provided, including a circuit board 101, LED beads 102, a battery 103, a glass lens 104, a protective cylinder 105, and a heat-conducting assembly. The heat-conducting assembly includes a first heat-conducting cylinder 106, a second heat-conducting cylinder 107, and a heat-conducting base 108. The LED beads 102 are located inside the first heat-conducting cylinder 106, and the battery 103 and the circuit board 101 are located inside the second heat-conducting cylinder 107. The LED beads 102 and the battery 103 are respectively connected to the circuit board 101. The LED beads 102 are located at the front end of the circuit board 101, and the battery 103 is located at the rear end of the circuit board 101. The first heat-conducting cylinder 106 and the second heat-conducting cylinder 107 are located inside the protective cylinder 105, and the second heat-conducting cylinder 107 is located at the rear end of the first heat-conducting cylinder 106. The heat-conducting base 108 is located at the rear end of the second heat-conducting cylinder 105. At the rear end of the cylinder 107, the heat-conducting base 108 is fixedly connected to the second heat-conducting cylinder 107, and the first heat-conducting cylinder 106 is fixedly connected to the second heat-conducting cylinder 107. The first heat-conducting cylinder 106, the second heat-conducting cylinder 107, and the heat-conducting base 108 are adapted to conduct heat to each other. The first heat-conducting cylinder 106 and the second heat-conducting cylinder 107 are respectively fixedly connected to the protective cylinder 105. The glass lens 104 is located at the front end of the first heat-conducting cylinder 106, and the glass lens 104 is fixedly connected to the protective cylinder 105. The first heat-conducting cylinder 106, the second heat-conducting cylinder 107, and the heat-conducting base 108 are made of aluminum alloy. The surfaces of the first heat-conducting cylinder 106, the second heat-conducting cylinder 107, and the heat-conducting base 108 are coated with an insulating layer. The protective cylinder 105 is made of plastic or rubber. The heat-conducting base 108 is adapted to be detachably fixedly connected to the steel plate or iron plate of the hull.

[0027] In the above-described implementation of this embodiment, the heat-conducting base 108 is fixed to the steel or iron plate of the hull. During the operation of the LED bead 102, the LED bead 102, circuit board 101, and battery 103 generate heat. The heat is conducted through the air to the first heat-conducting cylinder 106, the second heat-conducting cylinder 107, and the heat-conducting base 108. The first and second heat-conducting cylinders 106 and 107 conduct the heat to the heat-conducting base 108, which then conducts the heat to the steel or iron plate of the hull. Due to the large thickness and area of ​​the steel or iron plate of the hull, the heat from the heat-conducting base 108 can be quickly absorbed and dispersed to other parts. The heat dissipation efficiency of the LED beads 102, circuit board 101, and battery 103 is improved by reducing the temperature of the air inside the first heat-conducting cylinder 106 and the second heat-conducting cylinder 107, thereby improving the heat dissipation efficiency of the LED beads 102, circuit board 101, and battery 103. This helps to avoid local high temperatures and reduce the overall temperature of the emergency light. At the same time, the protective cylinder 105 is made of plastic and has a certain degree of heat insulation, preventing the first heat-conducting cylinder 106 and the second heat-conducting cylinder 107 from being directly exposed to the outside air after being heated. The heat is concentrated and conducted to the steel plate or iron plate of the hull through the heat-conducting base 108, which helps to solve the technical problem in the prior art that the heat generated by the emergency light may ignite the oil and gas in the engine compartment, leading to an explosion.

[0028] In some embodiments of this example, a plurality of magnets 109 are embedded and fixedly connected to the rear end face of the heat-conducting base 108. The rear end face of the magnets 109 is located on the same plane as the rear end face of the heat-conducting base 108. The magnets 109 are arranged in a circular array at equal angles around the center position of the heat-conducting base 108. The heat-conducting base 108 is adapted to be attracted and fixedly connected to the steel plate or iron plate of the hull by means of the magnets 109.

[0029] Through the above-described implementation method of this embodiment, since the engine compartment bulkhead of the hull is made of steel, it can be attracted by the magnet 109. By being attracted and fixed to the steel plate or iron plate of the hull by the magnet 109, the heat-conducting base 108 and / or the magnet 109 can be kept in close contact with the steel plate or iron plate of the hull, and the emergency light can be fixed to the steel plate or iron plate of the hull. This helps to improve the efficiency of heat conduction from the heat-conducting base 108 to the steel plate or iron plate of the hull, and also facilitates the installation and removal of the emergency light on the steel plate of the hull.

[0030] In some embodiments of this example, the heat-conducting base 108 has a notch 110 at its center, and a wireless charging coil 111 is fixedly connected inside the notch 110. The wireless charging coil 111 is connected to the circuit board 101.

[0031] Through the above-described implementation of this embodiment, the heat-generating components such as LED beads 102, circuit board 101, and battery 103 are sealed inside the emergency light to prevent them from being exposed to the outside air, thereby preventing the ignition of fuel gas due to excessively high local temperatures. To improve sealing, a fully enclosed structure is adopted. Instead of using a traditional charging interface to charge the battery 103, a wireless charging coil 111 is used to charge the battery 103. Since the heat-conducting base 108 is made of aluminum alloy, in order to prevent the heat-conducting base 108 from shielding the wireless charging coil 111 from receiving electromagnetic energy during the charging process, a notch 110 is provided and the wireless charging coil 111 is fixed in the notch 110 to achieve wireless charging. During use, the heat-conducting base 108 is placed on the charger so that the notch 110 is aligned with the charging area of ​​the charger.

[0032] In some embodiments of this example, an outer protective plate 112 and an inner protective plate 113 are fixedly connected within the notch 110. The outer protective plate 112 is located at the rear end of the heat-conducting base 108, and the inner protective plate 113 is located at the front end of the heat-conducting base 108. The wireless charging coil 111 is clamped between the outer protective plate 112 and the inner protective plate 113. The outer protective plate 112 and the inner protective plate 113 are made of plastic.

[0033] Through the above-described implementation of this embodiment, the inner protective plate 113 and the outer protective plate 112 are used to protect the wireless charging coil 111 and seal the notch 110.

[0034] like Figures 4 to 6 As shown, in some embodiments of this example, the heat-conducting assembly further includes a first heat-conducting partition 114. The first heat-conducting partition 114 is fixedly connected to the circuit board 101. The first heat-conducting partition 114 is closely attached to the front end of the circuit board 101. The first heat-conducting partition 114 is fixedly connected to the rear end of the first heat-conducting cylinder 106. The first heat-conducting partition 114 is provided with a through hole for the LED bead 102 to pass through. The front end of the LED bead 102 is located on the side of the first heat-conducting partition 114 away from the circuit board 101. The first heat-conducting partition 114 is made of aluminum alloy material, and the surface of the first heat-conducting partition 114 is coated with an insulating layer.

[0035] Through the above-described implementation method of this embodiment, the LED bead 102 is fixed to the circuit board 101. Both the circuit board 101 and the LED bead 102 generate heat during operation. A portion of the heat from the circuit board 101 and the LED bead 102 can be quickly and directly conducted to the first heat-conducting partition 114. The first heat-conducting partition 114 then conducts the heat sequentially to the second heat-conducting cylinder 107, the heat-conducting base 108, and the steel plate or iron plate of the hull, thereby improving the heat dissipation efficiency of the LED bead 102 and the circuit board 101 and helping to reduce the temperature of the LED bead 102 and the circuit board 101.

[0036] In some embodiments of this example, the heat-conducting assembly further includes a second heat-conducting partition 115, which is fixedly connected to the circuit board 101. The second heat-conducting partition 115 is closely attached to the rear end of the circuit board 101 and fixedly connected to the front end of the second heat-conducting cylinder 107. The battery 103 is fixed at the center of the rear end of the second heat-conducting partition 115. The second heat-conducting partition 115 is made of aluminum alloy and has an insulating layer coated on its surface.

[0037] Through the above-described implementation of this embodiment, both the battery 103 and the circuit board 101 generate heat during operation. The second thermally conductive partition 115 separates the battery 103 from the circuit board 101, preventing heat accumulation in the battery 103 and the circuit board 101 from causing local overheating. It can quickly conduct heat to the second thermally conductive partition 115, and then sequentially conduct it to the second thermally conductive cylinder 107, the thermally conductive base 108, and the steel plate or iron plate of the hull, thereby improving the heat dissipation efficiency of the battery 103 and the circuit board 101 and helping to reduce the temperature of the battery 103 and the circuit board 101.

[0038] In some embodiments of this example, the heat-conducting assembly further includes a plurality of heat-conducting pillars 116, which are located between the first heat-conducting partition 114 and the second heat-conducting partition 115. One end of the heat-conducting pillar 116 is fixedly connected to the first heat-conducting partition 114, and the other end of the heat-conducting pillar 116 is fixedly connected to the second heat-conducting partition 115. The circuit board 101 is provided with through holes through which the heat-conducting pillars 116 pass. The heat-conducting pillars 116 are made of aluminum alloy material, and the surface of the heat-conducting pillars 116 is coated with an insulating layer.

[0039] Through the above implementation of this embodiment, the thermal conductivity of the circuit board 101 is lower than that of aluminum alloy. The first thermally conductive partition 114 quickly conducts heat to the second thermally conductive partition 115 through the thermally conductive pillar 116, so as to realize the efficient conduction of heat from the front end to the rear end of the emergency light, reduce the overall temperature, and the heat can be evenly distributed on the thermally conductive components, which helps to avoid the problem of local overheating.

[0040] In some embodiments of this example, the protective cylinder 105 and the glass lens 104, and the protective cylinder 105 and the heat-conducting base 108 are sealed together by sealant.

[0041] In some embodiments of this example, the inner protective plate 113 and the heat-conducting base 108, and the outer protective plate 112 and the heat-conducting base 108 are sealed together by sealant.

[0042] In some embodiments of this example, a switch button 117 is fixedly connected to the side wall of the protective cylinder 105. The outer side of the switch button 117 is sealed to the protective cylinder 105 with sealant. The switch button 117 is connected to the circuit board 101 through a wire.

[0043] In this embodiment, the insulating layer is made of insulating paint, which can prevent leakage or short circuits caused by contact, thereby avoiding local overheating due to short circuits or leakage.

[0044] It should be noted that the reference Figure 2 In the description of the embodiments of this application, "front" refers to the direction of light illumination during the operation of the emergency light, "rear" refers to the opposite direction to "front", and "front end" refers to the front end of the specified component.

[0045] Because of the use of aluminum alloy materials for the first heat-conducting cylinder 106, the second heat-conducting cylinder 107, the heat-conducting base 108, the first heat-conducting partition 114, the second heat-conducting partition 115, and the sealing structure, the battery 103 is enclosed in a separate space, the LED bead is enclosed in a separate space, and the circuit board 101 is sandwiched between the first heat-conducting partition 114 and the second heat-conducting partition 115. Even if the battery 103 is damaged due to quality problems, it is not easy for the emergency light to explode. The circuit board 101 and the LED bead are protected by the first heat-conducting partition 114 and the second heat-conducting partition 115, which can prevent damage caused by the battery 103 overheating.

[0046] The above embodiments are merely explanations of this application and are not intended to limit it. After reading this specification, those skilled in the art can make modifications to the implementation methods of this application without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A marine LED explosion-proof emergency light, characterized in that, The device includes a circuit board, LED beads, a battery, a glass lens, a protective housing, and a heat-conducting assembly. The heat-conducting assembly comprises a first heat-conducting housing, a second heat-conducting housing, and a heat-conducting base. The LED beads are located inside the first heat-conducting housing, and the battery and circuit board are located inside the second heat-conducting housing. The LED beads and battery are respectively connected to the circuit board. The LED beads are located at the front end of the circuit board, and the battery is located at the rear end. The first and second heat-conducting housings are located inside the protective housing, with the second heat-conducting housing located at the rear end of the first heat-conducting housing. The heat-conducting base is located at the rear end of the second heat-conducting housing. The heat-conducting base is connected to the second heat-conducting housing. The cylinder is fixedly connected, the first heat-conducting cylinder and the second heat-conducting cylinder are fixedly connected, the first heat-conducting cylinder, the second heat-conducting cylinder and the heat-conducting base are adapted to conduct heat to each other, the first heat-conducting cylinder and the second heat-conducting cylinder are respectively fixedly connected to the protective cylinder, the glass lens is located at the front end of the first heat-conducting cylinder, the glass lens is fixedly connected to the protective cylinder, the first heat-conducting cylinder, the second heat-conducting cylinder and the heat-conducting base are made of aluminum alloy material, the surfaces of the first heat-conducting cylinder, the second heat-conducting cylinder and the heat-conducting base are coated with an insulating layer, the protective cylinder is made of plastic or rubber, and the heat-conducting base is adapted to be detachably fixedly connected to the steel plate or iron plate of the hull; The rear end face of the heat-conducting base is embedded with several magnets. The rear end face of the magnets is on the same plane as the rear end face of the heat-conducting base. The magnets are arranged in an equal-angle circular array around the center position of the heat-conducting base. The heat-conducting base is suitable for adsorption and fixed connection with the steel plate or iron plate of the hull through the magnets, which helps to improve the efficiency of heat conduction from the heat-conducting base (108) to the steel plate or iron plate of the hull. The heat-conducting assembly further includes a first heat-conducting partition, which is fixedly connected to the circuit board. The first heat-conducting partition is closely attached to the front end of the circuit board and fixedly connected to the rear end of the first heat-conducting cylinder. The first heat-conducting partition has a through hole for the LED beads to pass through. The front end of the LED beads is located on the side of the first heat-conducting partition away from the circuit board. The first heat-conducting partition is made of aluminum alloy and has an insulating layer coated on its surface. The heat-conducting component further includes a second heat-conducting partition, which is fixedly connected to the circuit board. The second heat-conducting partition is closely attached to the rear end of the circuit board and fixedly connected to the front end of the second heat-conducting cylinder. The battery is fixed at the center of the rear end of the second heat-conducting partition. The second heat-conducting partition is made of aluminum alloy and has an insulating layer coated on its surface. The heat-conducting assembly further includes multiple heat-conducting pillars located between the first heat-conducting partition and the second heat-conducting partition. One end of each heat-conducting pillar is fixedly connected to the first heat-conducting partition, and the other end is fixedly connected to the second heat-conducting partition. The circuit board has through holes through which the heat-conducting pillars pass. The heat-conducting pillars are made of aluminum alloy and have an insulating layer coated on their surface.

2. The marine LED explosion-proof emergency light according to claim 1, characterized in that, The heat-conducting base has a notch at its center, and a wireless charging coil is fixedly connected inside the notch. The wireless charging coil is connected to the circuit board.

3. The marine LED explosion-proof emergency light according to claim 2, characterized in that, An outer protective plate and an inner protective plate are fixedly connected within the notch. The outer protective plate is located at the rear end of the heat-conducting base, and the inner protective plate is located at the front end of the heat-conducting base. The wireless charging coil is clamped between the outer protective plate and the inner protective plate. The outer protective plate and the inner protective plate are made of plastic.

4. The marine LED explosion-proof emergency light according to claim 1, characterized in that, The protective cylinder and the glass lens, as well as the protective cylinder and the heat-conducting base, are sealed together with sealant.

5. The marine LED explosion-proof emergency light according to claim 3, characterized in that, The inner protective plate and the heat-conducting base, and the outer protective plate and the heat-conducting base are sealed together by sealant.

6. The marine LED explosion-proof emergency light according to claim 1, characterized in that, A switch button is fixedly connected to the side wall of the protective cylinder. The outer side of the switch button is sealed to the protective cylinder with sealant. The switch button is connected to the circuit board via a wire.

Images