Lighting fixtures for ships and other vessels and methods for preventing electrolytic corrosion thereof

Abstract

To provide a lighting fixture and an electric corrosion preventive technology preventing electric corrosion due to contacting of different kinds of metal when the lighting fixture is exposed to rain and the like.SOLUTION: A lighting fixture includes: a body portion 1 that is equipped with a substrate 2 equipped with a light source, a translucent cover portion 3, a metallic housing portion 4 having a heat radiation fin 5, and a tunnel-shape opening portion; and a fixing portion that is equipped with a metallic fixing tool 10 for fixing the body portion 1 to an installation part, a metal rod installed in the tunnel-shape opening portion for fixing the fixing tool 10 to the body portion 1, and a metallic nut 9 for rotatably fixing the metallic fixing tool 10 and the metal rod to the body portion 1. The lighting fixture has a water invasion preventive means for preventing the invasion of water to a contact part of the metal rod and the tunnel-shape opening portion.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to lighting fixtures mainly used outside a ship or the like.

Background Art

[0002] A lighting fixture uses, for example, a fluorescent lamp or an HID lamp as a light source, and is fixed to a support column or the like to illuminate a target irradiation site such as a road or a living room.

[0003] In addition to fluorescent lamps and HID lamps, light-emitting diodes (hereinafter referred to as "LEDs") have been used as light sources in recent years.

[0004] While LEDs have advantages such as low power consumption and long life compared to conventional light sources, they generate a relatively large amount of heat when lit. To avoid damage due to a decrease in the efficiency of the light-emitting part caused by heat generation or thermal expansion, a heat-conducting member, a heat sink for heat dissipation, or a heat sink is used to cover the periphery of the light-emitting part.

[0005] Particularly, in the case of lighting fixtures mainly used outside a ship or the like, since the light source is sealed for waterproofing, heat is likely to be trapped around the light source, and it is necessary to use a metallic material with excellent heat dissipation and thermal conductivity. Furthermore, methods such as circulating a refrigerant for cooling the light source (Patent Document 1) and combining heat dissipation fins (Patent Document 2) have been proposed.

[0006] On the other hand, when fixing a lighting fixture outside a ship, it is common to use a metallic material that is resistant to rust and has the strength and durability required for fixing.

Prior Art Documents

Patent Documents

[0007] <​​​​​​​​​ [Problems that the invention aims to solve]

[0008] When the materials possessing excellent heat dissipation and thermal conductivity are different metals from the materials required for fixing, there is a risk that galvanic corrosion may occur due to contact between dissimilar metals when exposed to seawater, raising concerns about problems such as deterioration and malfunction of lighting fixtures.

[0009] The aforementioned galvanic corrosion can be prevented, for example, by making metal contact surfaces non-contact through painting, coating, etc. However, there are parts where painting, coating, etc., is difficult during manufacturing, and there are problems with the paint, coating, etc. peeling off due to metal-to-metal contact, so a fundamental improvement has not been achieved.

[0010] Therefore, the present invention aims to provide a lighting fixture and a method for preventing galvanic corrosion caused by contact between dissimilar metals. [Means for solving the problem]

[0011] To solve the above problems, the present invention is characterized by having the following configuration.

[0012] A substrate equipped with a light source, a translucent cover, a metal housing with heat dissipation fins, and a main body having a tunnel-shaped opening, A lighting fixture comprising a fixing part that includes a metal fastener for fixing the main body to an installation site, a metal rod installed inside the tunnel-shaped opening for fixing the fastener to the main body, and a metal nut for rotatably fixing the metal fastener and the metal rod to the main body, A lighting fixture having a means to prevent water from entering the contact portion between the metal rod and the tunnel-shaped opening. [Effects of the Invention]

[0013] The lighting fixture and the method for preventing electrolytic corrosion thereof according to the present invention can prevent electrolytic corrosion caused by contact of dissimilar metals even when dissimilar metals are used in the lighting fixture, and can be implemented at low cost without using painting, coating, special materials or methods for the metal contact portion.

[0014] Furthermore, the lighting fixture and the method for preventing electrolytic corrosion thereof according to the present invention can fix the metal contact portion rotatably and can be used for various types of lighting fixtures, so they are excellent in versatility.

Brief Description of the Drawings

[0015] [Figure 1] Front view of the main body of the lighting fixture according to an embodiment of the present invention [Figure 2] Side view of the main body of the lighting fixture according to an embodiment of the present invention [Figure 3] Rear view of the main body of the lighting fixture according to an embodiment of the present invention [Figure 4] Reference view showing the attachment state of the metal rod and nut of the lighting fixture according to an embodiment of the present invention [Figure 5] Reference view showing the attachment state of fixtures etc. of the lighting fixture according to an embodiment of the present invention [Figure 6] Front view of the lighting fixture according to an embodiment of the present invention [Figure 7] Side view of the lighting fixture according to an embodiment of the present invention [Figure 8] Rear view of the lighting fixture according to an embodiment of the present invention

Embodiments for Carrying Out the Invention

[0016] Hereinafter, embodiments for carrying out the present invention will be described in detail.

[0017] The lighting fixture of the present invention is composed of a main body portion including a light source and a fixing portion for fixing the main body portion to a specific portion outside the ship.

[0018] The main body of the lighting fixture of the present invention is composed of a substrate provided with a light source, a translucent cover part for irradiating the light emitted from the light source to a target irradiation part, and a housing part that covers the substrate together with the translucent cover part to protect the substrate provided with the light source.

[0019] Furthermore, in order to install a metal rod used for connecting the main body part and the fixing part, an opening for inserting the metal rod is provided in a part of the housing part.

[0020] As the light source, commonly used electric lamps such as incandescent bulbs, fluorescent lamps, halogen lamps, etc. are used, and particularly LEDs that are bright and consume little power are preferred.

[0021] For the translucent cover part, commonly used materials such as transparent plastic, glass, lens plates, etc. can be used.

[0022] For the metal housing part having heat dissipation fins, those made of metallic materials with excellent heat transfer such as aluminum and copper can be used. Particularly, aluminum with excellent thermal conductivity, workability, and durability is preferred.

[0023] The fixing part of the lighting fixture of the present invention is composed of a metal fixture for fixing the main body part to an installation site, a metal rod installed inside the tunnel-shaped opening for fixing the fixture to the main body part, and a metal nut for rotatably fixing the metal fixture and the metal rod to the main body part.

[0024] For the above-mentioned fixture, metal rod, and metal nut, those made of metallic materials that are not easily rusted, such as stainless steel, are easy to process, and have durability can be used.

[0025] Since the metal rod is inserted into the opening in the main body part for use, it can have a cross-sectional shape such as round, triangular, square, etc. according to the shape of the opening.

[0026] The metal rod is provided with coupling elements for rotatably fixing the fixture to the metal nut at one or both ends.

[0027] Since the aforementioned fastener is fitted and secured to a metal rod, the contact portion with the metal rod can be formed in a notched shape. By forming a notch, it becomes possible to attach and detach the fastener with the nut slightly loosened without completely removing it.

[0028] Furthermore, the fastener can also have two notches formed at the contact points with the metal rod, and these two notches can be formed in opposite directions. By reversing the direction of the two notches, it is possible to prevent the fastener from falling off if the nut loosens or comes off over time.

[0029] The lighting fixture of the present invention has a means to prevent water intrusion in order to prevent malfunction caused by deformation or damage to the housing portion due to galvanic corrosion that occurs when the tunnel-shaped opening of the housing portion and the metal rod of the fixing portion are made of different metals, such as when rainwater or seawater adheres to the fixture.

[0030] Due to its structure, the tunnel-shaped opening in the housing is difficult to paint or coat. Furthermore, even if painting were to be applied, the metal rods remain in a rotatable state, leading to the problem of paint or coating peeling off due to friction between the tunnel-shaped opening and the metal rods. Therefore, it was difficult to avoid contact between dissimilar metals through painting or coating.

[0031] On the other hand, water intrusion prevention measures prevent electrical conduction when dissimilar metals are in contact and electrically conductive liquids such as water come into contact with the metals. Therefore, it is important that the measures have airtightness to prevent water intrusion, water resistance, and durability to withstand long-term use.

[0032] As a means of preventing water intrusion, for example, one method is to cover the metal rod in contact with the opening using a specific material that meets the above conditions, thereby sealing the contact area with the material and preventing water from coming into contact with the metal.

[0033] The specific materials mentioned above are not particularly limited as long as they can prevent water from entering, but are preferably at least one selected from resins, plastics, lubricants, elastomers, and coatings, with epoxy resin being particularly preferred due to its excellent sealing properties, water resistance, and durability.

[0034] The fixing portion of the lighting fixture of the present invention may consist of a metal fastener for fixing the main body to the installation site, a metal rod installed inside the tunnel-shaped opening for fixing the fastener to the main body, a metal nut for rotatably fixing the metal fastener and the metal rod to the main body, and a washer used between the fastener and the nut when fixing the fastener to the metal rod.

[0035] The washer can be a commercially available one, preferably a non-metallic one, and preferably a resin one. Compared to a metal washer, it can block the current that causes galvanic corrosion and can also improve the rotational flexibility of the fastener.

[0036] The lighting fixture of the present invention may further include wires for supplying electricity to the light source.

[0037] The above-mentioned electrical wires can be commercially available ones for lighting fixtures, and should be coated with resin or similar material to prevent water ingress and electrical leakage.

[0038] Furthermore, when using the lighting fixture in areas with low temperatures, the heat generated by the light source (LED) can create negative pressure inside the main unit, which may cause water to penetrate the insulation of the wires, potentially leading to problems such as condensation and electrical leakage.

[0039] As a method to prevent the above-mentioned water intrusion, for example, the wires near the main body of the lighting fixture can be processed with solder or the like, and the processed parts can be covered with resin or the like to block water from entering through the covered wires at the processed parts. [Examples]

[0040] An example of a preferred embodiment of the present invention will be described with reference to the drawings.

[0041] The main body of the lighting fixture according to the embodiment of the present invention has the appearance shown in the front view, side view, and rear view in Figures 1 to 3.

[0042] The main body 1 of the lighting fixture in this embodiment of the present invention comprises a substrate 2 equipped with a light source, a translucent resin cover 3, and an aluminum housing 4. Furthermore, the housing is provided with heat dissipation fins 5, which have the effect of suppressing the temperature rise of the main body due to the heat generated by the light source.

[0043] The main body of the lighting fixture in the embodiment of the present invention is provided with a tunnel-shaped opening 6 at the lower part of the housing.

[0044] As shown in Figure 4, the tunnel-shaped opening of the lighting fixture in the embodiment of the present invention is designed to allow the insertion of a metal rod 8 of the fixing part and to be secured with a metal nut 9.

[0045] As shown in Figure 5, the lighting fixture of the embodiment of the present invention uses a combination of the main body 1 and the metal rod 8, and the fixing device 10 is attached to the lower part of the main body and secured with a nut 9 and a washer 11, thereby integrating the main body and the fixing device.

[0046] In other words, the fixing part of the lighting fixture in the embodiment of the present invention is used by attaching it to the tunnel-shaped opening at the bottom of the main body, as shown in the front view, side view, and rear view in Figures 6 to 8.

[0047] The water intrusion prevention means for the lighting fixture in the embodiment of the present invention is installed and used at the point where the opening 6 and the metal rod 8 come into contact. For example, as a water intrusion prevention means, the metal rod is inserted with epoxy resin filled into the opening 6, and a fastener is attached using a washer and nut before the epoxy resin dries and hardens. By fixing it in this way before hardening, it is possible to prevent the formation of air bubbles and voids in the epoxy resin. Furthermore, using a resin washer can enhance the sealing effect of the epoxy resin, which is useful.

[0048] In the embodiment of the present invention, the lighting fixture may be provided with an electric wire or a connector for connecting the electric wire to the circuit board at the connection portion 7 on the back side of the circuit board 2 equipped with a light source. This method allows for a stable supply of electricity to the circuit board equipped with a light source from the outside without modifying the housing. [Industrial applicability]

[0049] The present invention can be applied to lighting fixtures that are highly bright and long-lasting, particularly lighting fixtures for ships and the like. The lighting fixture and its corrosion prevention method of the present invention can prevent corrosion caused by contact between dissimilar metals, even when dissimilar metals are used in the lighting fixture. Therefore, it is useful in supplying lighting fixtures for ships and the like at low cost without using special materials or methods.

Claims

1. (1) A substrate equipped with a light source; A translucent cover part; A metal housing with heat dissipation fins; A tunnel-shaped opening and; A main body equipped with, (2) A metal fastener for fixing the main body to the installation site; The aforementioned fastener is installed inside the tunnel-shaped opening in order to fix it to the main body. A metal rod and; A metal fastener and a metal rod are rotatably fixed to the main body. And; A fixing part comprising, A lighting fixture equipped with, The contact portion between the metal rod and the tunnel-shaped opening is formed by the hardened epoxy resin. Lighting fixtures that are sealed and filled to prevent water from entering.

2. Claim 1, the contact portion of the metal fastener with the metal rod is formed in a notched shape. The lighting fixtures listed.

3. Two contact points between the metal fastener and the metal rod are formed in a notched shape, The lighting according to claim 2, wherein the two notches are formed in opposite directions (up and down). Equipment.

4. Furthermore, the main unit is equipped with power supply wires, and a portion of these wires is illuminated by an appropriate method. The lighting fixture according to claim 1, which prevents water from entering the main body of the lighting fixture.

5. Furthermore, the main unit is equipped with power supply wires, and a portion of these wires is illuminated by an appropriate method. The lighting fixture according to claim 3, which prevents water from entering the main body of the lighting fixture.

6. (1) A substrate equipped with a light source; A translucent cover part; A metal housing with heat dissipation fins; A tunnel-shaped opening and; A main body equipped with, (2) A metal fastener for fixing the main body to the installation site; The aforementioned fastener is installed inside the tunnel-shaped opening in order to fix it to the main body. A metal rod and; A metal fastener and a metal rod are rotatably fixed to the main body. And; A fixing part comprising, In a lighting fixture equipped with, The aforementioned tunnel-shaped opening is filled with epoxy resin, and before the epoxy resin hardens... The metal rod is inserted and the epoxy resin is cured, thereby the metal rod and the A method for preventing galvanic corrosion in lighting fixtures by sealing the contact area with the channel-shaped opening to prevent water ingress. Law.

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