JP2007027054A - Boat light - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a boat light with simple structure capable of preventing LEDs from becoming to have a high temperature, and capable of maintaining an appropriate light emission conditional temperature. <P>SOLUTION: A hollow metal cylinder 30 for a prop penetrating in vertical direction in a sealed casing is installed, and LEDs 36 supported by the metal cylinder are mounted on the metal cylinder. Upper part and lower part of the metal cylinder 30 are opened so as to make open air get in and get out therefrom. Heat radiation plates 14, 19 contacting the open air are integrally formed on the upper part and lower part of the metal cylinder 30 for the prop. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a boat lamp used for safety when navigating or anchoring a ship, and relates to a boat lamp using an LED (light emitting diode) as a light source.

    In general, there are two types of ship lights: signal lights and navigation lights. Navigation lights include front lights (mast lights), anchor lights, anchor lights, stern lights, port lights, starboard lights ( Starboard lights) and red lights. All of these are exposed to seawater, wind and rain, and direct sunlight, are placed under severe temperature conditions, and are indispensable for safe navigation of ships. The environment must be able to withstand.

    As shown in FIG. 7, this type of conventional shiplight uses a filament-type light bulb 1 as a light source and is detachably mounted on a socket 3 fixed to a support base 2, and its periphery is formed in a cylindrical shape. In general, the light-shielding plate 5 is surrounded by the light-transmitting cover 4 and a light-shielding plate 5 is attached to the outside or the inside of the cover 4 in accordance with the type of shiplight to limit the irradiation angle in the horizontal direction. There is also known a light-transmitting cover 4 provided with a condensing lens 6 continuously in the circumferential direction, thereby suppressing light diffusion in the vertical direction (for example, Patent Document 1).

On the other hand, in recent years, LEDs have been used as light sources for road signal lights and various lighting fixtures, and are being put to practical use. Ship lights that use LEDs as light sources have also been proposed (Patent Literature). 2 and 3).
JP 10-149704 A Japanese Utility Model Publication 2-56095 Japanese Utility Model Publication No. 4-133303

However, the LED has a characteristic temperature characteristic, and when it is placed under a high temperature condition higher than an appropriate temperature, it has a characteristic that an appropriate light emission performance cannot be obtained. On the other hand, ship lights such as voyage lights are placed under severe conditions exposed to wind and rain and seawater, so they are housed in sealed containers, but ship lights using conventional LEDs, In particular, in the case of what is used as a navigation light, there is a possibility that the heat generated by the LED will be trapped in the container and the inside will become hot.
In view of such a conventional problem, the present invention has been made for the purpose of providing a ship lamp having a simpler structure, capable of preventing an LED from being heated at a high temperature, and maintaining an appropriate light emission condition temperature.

    A feature of the invention of claim 1 that solves the conventional problems as described above and achieves the intended object is that a plurality of LEDs are used as a light source, and the light-transmitting part is enclosed in a sealed casing having a light-transmitting part. In the shiplight in which the LEDs are arranged side by side, a hollow metal column for a column is installed so as to penetrate vertically in the casing, and the LED is attached to the metal column for the column, and is attached to the metal column. The upper and lower openings of the cylinder are opened so that outside air can enter and exit above and below the casing.

    In addition to the structure of the first aspect, a feature of the invention of claim 2 is that a metal LED support base is fixed to the outer periphery of the support metal tube, and a large number of LEDs are fitted to the support base. There is.

    Further, the invention of claim 3 is characterized in that, in addition to the structure of claim 1 or 2, a metal heat radiating plate constituting the outer wall of the casing is integrated with the upper and lower ends of the metal cylinder for the column. That is.

    In the present invention, in a boat lamp in which a large number of LEDs are used as a light source and the LEDs are arranged side by side in a sealed casing having a light-transmitting portion toward the light-transmitting portion, A metal column for a hollow column that penetrates and is installed, supported by the column metal column, the LED is mounted, and the upper and lower openings of the metal tube are opened to allow outside air to enter and exit the casing. Thus, the heat generated from the LED is transmitted to the support column and warms the air inside thereof, and the warmed air rises and is released upward. As a result, a heat dissipation effect can be obtained, and a high heat dissipation effect can be obtained even if the casing in which the LEDs are housed has a sealed structure.

    Moreover, since the structure is a simple one in which the LED is held by a metal cylinder having high thermal conductivity, the cost is not increased and the LED can be easily manufactured.

    In the present invention, a metal LED support base is fixed to the outer periphery of the support metal tube, and a large number of LEDs are fitted to the support base, thereby simplifying the LED mounting structure.

    Further, by integrating the metal heat sinks forming the outer wall of the casing with the upper and lower ends of the metal column for the support column, a heat radiation action is performed not only on the metal tube but also on the upper and lower outer surfaces of the casing. High heat dissipation effect can be obtained.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an example of a shiplight according to the present invention. The casing of this shiplight is a hollow cylinder interposed between a lowermost base unit 10, an uppermost top unit 11, and both units 10, 11. And a cylindrical body cylinder 12.

    The body cylinder 12 has a light source housing inside, and the entire body cylinder 12 is formed in a hollow cylinder shape with a light-transmitting hard synthetic resin material or impact-resistant glass, and the circumferential wall thereof has a circumferential direction. Convex convex lenses 13 and 13 are integrally formed in an upper and lower two-stage arrangement. The convex lenses 13 and 13 serve as a translucent part for irradiating light to the outside.

    The base unit 10 has a circular upper open box shape, has an opening on the bottom surface, and the opening is closed by a bottom plate 14. The bottom plate 14 is made of a metal material having high thermal conductivity, and is screwed with bolts 15 so that it can be removed. A power supply circuit 17 is accommodated in the base unit 10. A flange 16 is integrally formed on the outer periphery of the upper end of the base unit 10, and the lower end of the barrel cylinder 12 is joined to the flange 16 and bonded in an airtight state with an adhesive.

    The top unit 11 is formed in a circular hollow box shape, a flange 18 is integrally formed on the outer periphery of the lower end, and the upper surface of the peripheral portion of the circular closed funnel-shaped top closing plate 19 is joined to the lower surface by an adhesive. Adhered with airtightness. The upper end of the barrel cylinder 12 is joined to the lower surface of the peripheral edge portion of the top closed plate 19 and is adhered with an airtightness by an adhesive. Further, an opening 20 is formed in the central portion of the top surface of the top unit 11.

    On the upper surface of the flange 16 of the base unit 10 and the lower surface of the flange 18 of the top unit 11, concave grooves 21 and 22 for attaching a light shielding plate are formed opposite to each other outside the joining position of the body tube 12. The light-shielding plate 23 is attached by fitting the upper and lower edges in both the concave grooves 21 and 22. The shading plate 23 is attached to shield a desired angle range of the circumference of the trunk cylinder 12 as necessary, and is not used for a ship lamp that emits light over the entire circumference of the trunk cylinder 12. .

    In the center of the bottom plate 14 of the base unit 10, a support metal cylinder 30 is penetrated and integrated, and the lower end of the metal cylinder 30 is opened on the lower surface of the bottom plate 14. The column metal cylinder 30 is inserted in the center of the trunk cylinder 12 and is joined to the lower surface of the top closing plate 19 whose upper end is fixed to the upper end of the trunk cylinder 12.

    The top closed plate 19 is made of a metal material having a high thermal conductivity, and an opening 31 is formed at the center thereof, and a downward short cylindrical portion 32 is integrally formed at the peripheral edge thereof. The upper end of the column metal cylinder 30 is fitted to the outside of the short cylinder portion 32 and joined to the lower surface of the top closing plate 19 through the packing 33 in a state of being airtight.

    As shown in FIGS. 1, 5, and 6, a light source support base 35 having a ring shape is fixed on the outer periphery of the column metal cylinder 30 at the same height as the convex lenses 13 and 13 of the barrel cylinder 12 described above. Has been. The light source support base 35 is composed of a flexible printed circuit board, and a large number of LEDs 36, 36,... As light sources are attached to the outer periphery of the light source support base 35 side by side in the circumferential direction at regular intervals. The LEDs 36, 36... Are energized from the power supply circuit 17 through lead wires 37, 37. These LEDs 36, 36... Radiate light radially toward the ring-shaped convex lenses 13, 13 of the trunk cylinder 12.

  A pair of reflecting mirrors 40 and 41 having a disk shape are fixed on the upper and lower sides of the light source support bases 35 and 35, respectively. Each of the reflecting mirrors 40 and 41 is provided with a mounting hole at a central portion thereof, and the columnar metal cylinder 30 is inserted into the opening.

    The reflecting mirrors 40 and 41 and the light source support bases 35 and 35 arranged in two pairs above and below are fixed in a predetermined arrangement with predetermined intervals by fixing rings 42 and 43 at both upper and lower ends and a central spacer ring 44. Has been. The rings 42, 43, 44 are respectively fitted on the outer periphery of the metal column 30 for supporting columns, and fixing protrusions 42a, 43a project inwardly from the fixing rings 42, 43 at both upper and lower end positions. This is fixed at a predetermined height position by fitting it into an engaging recess formed on the outer periphery of the metal column 30 for pillars, whereby the reflecting mirror 40, the light source support base 35 and the reflecting mirror 41 are arranged in a predetermined order. It is positioned at the position and interval.

    Both reflecting mirrors 40 and 41 are formed in conical shapes that are opposite to each other, and are arranged so that the distance between them is wider on the outer peripheral side than on the central portion side. The reflecting mirrors 40 and 41 have reflecting surfaces 40a and 41a that face each other, thereby forming a tapered light radiation space 45 whose outer peripheral side (convex lens 13 side) is wider than the central part of the reflecting mirror. It is formed continuously in the circumferential direction.

    In the figure, reference numeral 46 denotes an elastic packing interposed between the rings 42 to 44 and the reflecting mirror 40 or 41.

    In the ship lamp according to the present invention configured as described above, the light emitted from the LED 36 as the light source is diffused in the radiation direction of the entire circumference on the front side, but the light is reflected on both the reflection surfaces 40a, The light is reflected by 41a and collected at the central portion, and this is further converted into a light flux whose vertical width is narrowed by the convex lens 13 and irradiated in the horizontal radiation direction.

  The LED 36 emits light when a predetermined energization is performed, and emits heat when the light is emitted, but this heat is transmitted to the metal column 30 for support through the light source support base 35. When the metal tube is heated, the air inside is warmed and rises, and air is introduced from below to generate convection and dissipate heat. Moreover, the heat | fever of the metal cylinder 30 for support | pillars is transmitted to the baseplate 14 of a base unit, and the top closed version 19 of a top unit, and these become a heat sink and are radiated from those surfaces.

    In this way, the heat generated by the LED is transmitted to the metal column 30 for the support column and is dissipated by the heat radiating plate composed of the bottom plate 14 and the top closed plate 19, thereby preventing abnormal overheating and maintaining an appropriate light emitting action.

    In the above-described embodiment, LEDs are arranged in a row in the circumferential direction, a pair of reflecting mirrors are installed on the top and bottom, and a convex lens is provided on the outside between the reflecting mirrors to form one light emitting unit. Although an example in the case of the configuration is shown, the reflecting mirror and the convex lens may have other arrangements, or may not require these. Furthermore, the support of the LED to the metal column for the support column is not limited to the case where the light source support using the printed circuit board is used, and any other support means may be used as long as the LED heat is transmitted to the metal tube for the support column.

    In the above-described embodiment, the metal column for the column is installed in the central portion of the cylindrical casing and the LEDs are arranged side by side in the circumferential direction. However, the casing is semicircular and square. The metal column for the column may be installed at a position offset from the central part of the casing, and the LED is arranged in the axial direction on the outer periphery of the metal column for the column. It may be installed side by side.

It is a longitudinal cross-sectional view of the ship lamp which shows an example of implementation of this invention. It is a top view same as the above. It is a bottom view same as the above. It is a perspective view which shows a light shielding plate attachment state same as the above. It is a disassembled perspective view of LED of a shiplight shown in FIG. 1, and a reflective mirror installation part. It is a partial expanded sectional view which shows the assembly state same as the above. It is sectional drawing which shows an example of the conventional shiplight.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Base unit 11 Top unit 12 Body cylinder 13 Convex lens 14 Bottom plate 15 Bolt 16 18 Flange 17 Power supply circuit 19 Top closed plate 20 Opening 21 22 Groove 23 Shading plate 30 Metal cylinder 30 for support | pillar 30 Short cylinder part 33 Packing 35 Light source Support stand 36 LED
37 Lead wire 40 41 Reflector 42 43 Fixing ring 42a 43a Fixing protrusion 44 Spacer ring 45 Radiation space 46 Elastic packing

Claims (3)

In a shiplight that uses a large number of LEDs as a light source and is arranged side by side with the LEDs facing the light-transmitting part in a sealed casing having a light-transmitting part,
A hollow column metal cylinder is installed in the casing so as to penetrate the upper and lower sides, and the LED is mounted by supporting the metal column for the column. Outside air enters and exits the upper and lower openings of the metal cylinder above and below the casing. A boatlight that is characterized by being able to open.   The ship lamp according to claim 1, wherein a metal LED support base is fixed to the outer periphery of the support column metal tube, and a number of LEDs are fitted to the support base.   The shiplight according to claim 1 or 2, wherein a metal heat sink that forms an outer wall of the casing is integrated with upper and lower ends of the metal cylinder for the column.