JP2007313946A - Lighting unit for lighting buoy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting unit for a lighting buoy in which the beam of light reaches to a far vessel even if the lighting buoy is inclined at the existence of a billow, the beam of light is evenly irradiated over all azimuths in a horizontal direction and a burden of maintenance is also reduced in the lighting unit for the lighting buoy using a light emission diode. <P>SOLUTION: In the lighting unit for the lighting buoy having an annular trough type reflection mirror 120 comprising the light emission diode 130 and a paraboloid, the light emission diode is attached to an insertion hole formed at the bottom of the annular trough type reflection mirror comprising the paraboloid so that all light emission portions of the light emission diode are exposed from the back side of the annular trough type reflection mirror to solve the problem. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lamp for a light buoy (Buoy), more specifically, even if the light buoy tilts due to waves, the light beam reaches a distant ship, and the light beam extends in all directions in the horizontal direction. The present invention relates to a lamp buoy lamp that emits light evenly.

  Even in today's maritime traffic environment, where the Global Positioning System (GPS) has been developed and popularized, navigational signs that can be visually confirmed, particularly light buoys that clearly indicate navigation routes and reefs, are still There is a strong demand for lamp buoy lamps with high visibility and high visibility. Therefore, each company that manufactures and sells lamp buoy lamps shows the vertical light distribution angle (vertical divergence angle) of the light emitted from the light-emitting diodes so that the light reaches the farthest ship as shown in FIG. It was narrowed down to about ± 4 ° (for example, see Non-Patent Documents 1 and 2).

Further, the lamp 700 shown in FIG. 8 is a perspective view of the lamp supplied by the present applicant to the market, and FIG. 9 is a vertical sectional view of the lamp 700 shown in FIG. (For example, refer nonpatent literature 3). FIG. 10 shows the vertical light distribution characteristics, that is, the relationship between the vertical angle (°) and the luminous intensity (cd) at a certain horizontal angle (°) (in FIG. 10, 60 ° intervals (a) to (f)). Show. FIG. 11 shows the horizontal light distribution characteristic, that is, the relationship between the horizontal angle (°) and the central luminous intensity (cd) with respect to the direction.
Zenilite Buoy Co., Ltd. <URL: http://www.zenilite.co.jp/index.html> Noriyuki Tsubouchi, Katsuzo Mori, Junji Inagaki, co-authored, “Lighthouse-Maritime Signs and Signals”, Naruyamado Shoten Co., Ltd., January 1993, p. 46-55, p. 124-138 Home page showing the current lamps of Nippon Koki Kogyo Co., Ltd. (from the homepage of the Japan Navigation Signs Association) <URL: http://www.jana.or.jp/>

  However, due to the recent increase in user needs, that is, the strict specifications required by the Japan Coast Guard, which is the main installation and manager (Circuit Signing Act Article 2: Installation and management of the route sign is performed by the Japan Coast Guard) Conventional lamps such as those described above cannot be used. The strict specification requirement means that the vertical light distribution angle is set to ± 15 ° or more without the central luminous intensity (peak luminous intensity when the vertical angle is 0 °) of the lamp is less than the conventional specification of 200 cd. That is, as shown in FIG. 6, even if the light buoy is shaken by the traveling wave of the ship that is traveling near the light buoy, the light can be recognized from the ship that is traveling far away.

  In the conventional lamp, as shown in FIGS. 10 and 11, the central luminous intensity with respect to the horizontal angle varies greatly depending on the horizontal angle. In this example, (maximum luminous intensity−minimum luminous intensity) ÷ maximum luminous intensity × 100 (% ) Exceeds 20%, and is expected to be suppressed to 15% or less. By the way, the numerical values used for deriving this value are obtained by measuring the horizontal angle at 10 ° intervals as shown in FIG. 11, and therefore using 266 cd at the horizontal angle of 290 ° and 193 cd at 180 ° as the maximum luminous intensity. , (266-193) ÷ 266 × 100≈27.4%.

In addition, it is also necessary to perform more advanced blink control, such as mounting a GPS reception function on the lamp buoy lamp and controlling the blink timing, blink order and blink direction of many lamp buoy lamps. It has become. Furthermore, there has been a demand for reducing the maintenance burden of replacing a spare machine once every two or three years.
As shown in FIG. 9, in the conventional lamp, two paraboloids are formed by two sets of two curved surfaces 700a to 700d, and an offset position relative to the reflector 700, that is, the center of the paraboloid. In order to support the light emitting diode 730 attached to the position where the lens is removed, a so-called Mt. Fuji-shaped parabolic reflector in which a dead space is generated between two curved reflectors has been used. In this case, in order to increase the luminous intensity, a light beam emitted from the light emitting diode 730 must be captured by the paraboloid of the reflecting mirror as much as possible. In order for the paraboloid of the reflecting mirror 700 to capture a large amount of light and reflect the captured light in the horizontal direction, the focal length is shortened and the paraboloid is also made longer (wider), and the optical system becomes larger. To do.

  In addition, when the vertical divergence angle is increased by the above method, there are two methods: (1) the light emitting diode is brought closer to the paraboloid of the reflector to shorten the focal length, or (2) the paraboloid curve is changed. Conceivable.

  When the light emitting diode of (1) is brought close to the paraboloid of the reflecting mirror, the paraboloid is shortened (narrow) so that the light emitting diode does not interfere with the reflected light when the reflecting mirror reflects light in the horizontal direction. However, if the paraboloid is shortened, the ratio of the luminous flux captured by the paraboloid of the reflecting mirror to the total luminous flux emitted from the light emitting diode is reduced. Further, since the focal length is shortened, the central luminous intensity is lowered.

  Even when the curve of the paraboloid (2) is changed, the central luminous intensity decreases unless the luminous flux captured by the reflecting mirror increases.

  In either case, in order to maintain the central luminous intensity in the horizontal direction, a method of increasing the number of light emitting diodes or increasing the amount of current to flow per light emitting diode must be taken.

  When the number of light emitting diodes is increased, the outer diameter of the optical system is increased because the light emitting diodes are arranged in a ring shape. On the other hand, when the amount of current that flows per light emitting diode is increased, the life of the light emitting diode is shortened.

  Accordingly, an object of the present invention is to provide a lamp buoy lamp using a light-emitting diode, even when the lamp buoy is tilted by waves, the light beam reaches a distant ship and the light beam is omnidirectional in the horizontal direction. An object of the present invention is to provide a lamp buoyant lamp that is uniformly radiated over a wide area and has a reduced maintenance burden.

  The invention according to claim 1 is directed to a lamp buoy lamp having a light emitting diode and an annular saddle-shaped reflector comprising a parabolic surface, wherein the light emitting diode is disposed at a bottom portion of the annular saddle-shaped reflector comprising the parabolic surface. The above-described problem is solved by mounting the light-emitting portion of the light-emitting diode from the back side of the annular saddle-shaped reflector in the perforated insertion hole.

  In addition to the configuration of the invention according to claim 1, the invention according to claim 2 has a vertical light distribution luminous intensity width in which the luminous intensity emitted from the lamp buoyancy lamp indicates one-tenth of the maximum value of the luminous intensity. The difference between the maximum luminous intensity and the minimum luminous intensity in the horizontal light distribution luminous intensity is ± 15 ° or more and is 1/15 or less of the maximum luminous intensity, thereby further solving the above problem.

  According to a third aspect of the invention, in addition to the configuration of the invention according to the first or second aspect, the light-emitting diode is a bullet-type light-emitting diode, thereby further solving the above problem.

  According to a fourth aspect of the present invention, in addition to the configuration according to the first to third aspects of the present invention, the lamp buoy lamp is equipped with a GPS reception function, thereby further solving the above problem. Is.

  According to the first aspect of the present invention, in the lamp buoy lamp having the light emitting diode and the annular saddle-shaped reflector made of a paraboloid, the light emitting diode is a bottom of the annular saddle-shaped reflector made of the paraboloid. Direct light emitted from the light emitting diode by being mounted so that all of the light emitting portion of the light emitting diode is exposed from the back side of the annular saddle-shaped reflector to the insertion hole drilled in the part, Since the reflected light reflected by the annular reflector is radiated from the lamp, the synergistic effect thereof reduces the central luminous intensity of the lamp (peak luminous intensity when the vertical angle is 0 °), The vertical light distribution angle width can be ± 15 ° or more.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the luminous intensity emitted from the lamp buoy lamp is one-tenth of the maximum value of the luminous intensity. The light intensity width is ± 15 ° or more, and the difference between the maximum light intensity and the minimum light intensity in the horizontal light distribution light intensity is 1/15 or less of the maximum light intensity, thereby suppressing the light intensity with respect to the horizontal angle from varying depending on the angle. Is possible.

  According to the invention according to claim 3, in addition to the effect of the invention according to claim 1 or 2, the manufacturing cost of the lamp buoyancy lamp can be reduced by using a bullet-type light emitting diode as the light emitting diode. In addition, it is possible to realize a sufficiently large vertical light distribution angle width without using an expensive diffused light emitting diode by cooperating with the annular saddle-shaped reflecting mirror.

  According to the invention of claim 4, in addition to the effects of the inventions of claims 1 to 3, the lamp buoy lamp has a GPS reception function, so that It is possible to perform advanced blinking control such as controlling the timing and the order and direction of blinking of many lamp buoy lamps.

  An example of an embodiment of the present invention will be described with reference to FIGS.

  1 is a perspective view of a lamp according to the present invention, and FIG. 2 is a vertical sectional view of the lamp 100 shown in FIG.

  FIG. 3 shows the vertical light distribution characteristic, that is, the relationship between the vertical angle (°) and the luminous intensity (cd) at a certain horizontal angle (°). FIG. 4 shows the horizontal light distribution characteristic, that is, the relationship between the horizontal angle (°) and the central luminous intensity (cd) with respect to the direction. FIG. 5A is a horizontal sectional view showing a part (one-eighth of the whole) of the arrangement state of the light emitting diodes 130 attached to the annular saddle-shaped reflector denoted by reference numeral 120 in FIG. FIG. 5B is a vertical sectional view showing the light emitting diode 130 mounted on the annular saddle-shaped reflecting mirror 120.

  Note that the vertical light distribution characteristic shown in FIG. 3 and the horizontal light distribution characteristic shown in FIG. 4 are compared with the optical characteristics of the conventional lamp, so that the conventional lamp shown in FIGS. Optical characteristics are indicated by dotted lines. In addition, in order to help understanding, members having the same functions in FIGS. 2 and 9 are given a reference number in which the hundreds place is 1 (FIG. 2) or 7 (FIG. 9) and the lower two digits are unified. Yes.

  FIG. 6 is a diagram showing how the light emitted from the lamp reaches a distant ship when the lamp buoy of the present invention is tilted by ocean waves, and FIG. It is the figure which showed how the light radiated | emitted from the lamp | ramp reaches | attains a distant ship when a buoy inclines by the sea wave.

  The structure of the optical system of the lamp according to the present invention is remarkably reduced in size as compared with a conventional lamp by incorporating a light emitting diode 130 into the annular saddle-shaped reflector 120 as shown in FIG. ing. With respect to the principle of light emission, as shown in FIG. 5B, a light beam emitted from the package side surface 130a of the light emitting diode 130, which was hardly captured by a conventional lamp, is a small annular saddle-shaped reflector paraboloid with a short focal length. The light beam is reflected by 120a and reflected. On the other hand, the light beam emitted from the vicinity of the top portion 130b of the light emitting diode is directly emitted from the lamp without passing through the optical system.

  Since the light beam in the horizontal direction (vertical angle is 0 °) does not pass through the optical system, there is no reflection loss due to the reflecting mirror as compared with the conventional lamp, and there is no loss emitted from the vicinity of the light emitting diode top portion 130b. Has directivity specific to the light emitting diode 130 and contains more divergent components than focusing on parallel light using an optical system. On the other hand, the reflected light emitted from the package side surface 130a of the light emitting diode 130 and captured by the annular saddle-shaped reflecting mirror 120a is also superimposed on the divergent component, thereby realizing a wide vertical divergence angle.

  The vertical divergence angle is adjusted by finely adjusting the mounting position (focal length) of the light emitting diode 130 with respect to the reflecting mirror, as shown in FIG. This is to adjust the luminous flux captured by the annular saddle-shaped reflecting mirror 120a out of the luminous flux emitted from the package side surface of the light emitting diode 130, and the fine adjustment of the focal length is performed with the central luminous intensity in the vicinity of the horizontal direction (vertical 0 °) ( It has a characteristic that does not give a significant change to the peak luminous intensity. In FIG. 5B, a line indicated by a two-dot chain line indicates light emitted from the head of a round and Oval Lamp light emitting diode 130, and a line indicated by a straight line is a ring shape. A light beam reflected at least once by the saddle-shaped reflecting mirror 120a is shown.

  As can be seen from FIG. 5A, the light source unit of the present embodiment is inserted into the insertion hole formed in the bottom portion 120b of the annular saddle-shaped reflector 120 having a radius of 138 mm from the back side of the annular saddle-shaped reflector 120. The light emitting parts of the 96 light emitting diodes 130 are mounted so as to be exposed. The light emitting diode 130 uses a bullet type light emitting diode that has a broad directivity (Relative Luminous Intensity) and is inexpensive. In this embodiment, the light emitting diode 130 uses a green bullet-type light emitting diode, but the color of the light emitting diode 130 is specified by the user (in many cases, the Japan Coast Guard) (white). , Red, green, etc.) are used.

  The annular saddle-shaped reflecting mirror 120 is constituted by cutting a paraboloid from a solid donut-shaped ring made of aluminum by cutting. When the paraboloid is formed by this method, the accuracy of the paraboloid can be remarkably increased as compared with the case where the paraboloid is formed by other methods such as drawing or pressing. As a result, the light emitting diodes 130 can be mounted accurately in a radial manner, and the occurrence of unevenness in the horizontal light distribution luminous intensity can be suppressed as compared with the conventional lamp as shown in FIG.

  In the lamp of the present invention, as shown in FIGS. 3 and 4, the variation in the central luminous intensity with respect to the horizontal angle is small. In this example, the optical characteristic defined by (maximum luminous intensity−minimum luminous intensity) ÷ maximum luminous intensity × 100 (%) is 15% or less. 3 and 4, the graph drawn with a solid line is that of the present invention, and the one drawn with a broken line is that of a conventional lamp. Incidentally, the numerical value used for deriving this value is that the horizontal angle is measured at intervals of 10 °, so that the maximum luminous intensity is 295 cd at a horizontal angle of 230 ° and 265 cd at 90 ° (295-265). The optical characteristic value is derived as ÷ 295 × 100≈10.2%.

  As described above, in the lamp of the present invention, 96 light emitting diodes 130 are used per one annular saddle-shaped reflecting mirror 120, and four annular saddle-shaped reflecting mirrors 120 are used. Therefore, the total number of light emitting diodes 130 is 384. The four light emitting diodes 130 are connected in series, and the four are connected in parallel. Furthermore, the current flowing through the light emitting diode 130 is used by dropping it to nearly half of the rated current using a limiting resistor. As a result, the life of the light emitting diode 130 can be greatly extended as compared with the conventional lamp. Even if the lamp of the present invention is used by reducing the energization current of the light emitting diode 130 to almost half, the central luminous intensity is defined by the direct light of the light emitting diode 130 (the conventional lamp is reflected by the reflector). The reflected light) and the central luminous intensity can be kept at a predetermined value (200 cd) or more. Furthermore, since the current to be supplied to the light emitting diode 130 is reduced to almost half of the rated value, the specification of 16W-12V or less is cleared even when it is applied to the GPS reception function mounted on the lamp of the present invention. is doing.

  The light buoy lamp 100 according to the present invention has compatibility with a conventional light buoy buoy (not shown), and the mount 140 shown in FIG. 2 is shown in FIG. It is comprised in the same shape as the mount part 740 of the conventional lamp. Further, as shown in FIG. 9, the conventional lamp uses the reflecting plate 720 in an offset form, and therefore, between the uppermost reflecting plate 720a and the second reflecting plate 720b and the third reflecting plate 720c. Space for supporting the light emitting diode 730 is required between the lowermost reflector 720d and the lamp buoy lamp 100 according to the present invention, as clearly shown in FIG. The reflecting mirror 120 is brought into close contact with each other. Therefore, in the conventional lamp 700, the height h2 (excluding the bird guard 760) is required to be approximately 595 mm. However, in the lamp buoy lamp 100 according to the present invention, the height h1 (the bird guard 160 is changed). Is 442 mm, which is nearly 30%, the height is reduced, and it is compact.

  Further, as clearly shown in FIG. 2, the light source unit is covered with a hood 150 integrally formed of a colorless and transparent methacrylic resin. The hood 150 is in close contact with the housing 154 of the lamp 100 with an O-ring 152 made of silicon rubber interposed. In addition, a bird guard 160 is installed in the center of the head of the hood 150. Furthermore, the GPS receiving function 170 is mounted in the hood 150, and performs advanced blink control, such as controlling the blinking timing of the lamps, the blinking order and the blinking direction of many lamp buoyancy lamps. It is possible.

  In the above-described embodiment, the number of the annular saddle-shaped reflecting mirrors 120 is four. However, depending on the required specifications, the number may be three or five. Needless to say, the number of light emitting diodes can be increased or decreased in accordance with required specifications.

  Even in today's maritime traffic environment, where the global positioning system has been developed and spread, visual information has become increasingly important for ensuring safety in coastal waters, routes, and harbors where ships are congested. The industrial applicability of the lamp buoyancy lamp of the present invention is extremely high.

The perspective view of the lamp device for lamp buoys of this invention. The vertical cross section of the said lamp buoy lamp. The figure which shows the vertical light distribution characteristic of the lamp device for lamp buoys of this invention. The figure which shows the horizontal light distribution characteristic of the lamp device for lamp buoys of this invention. The figure which shows the mounting state of a light emitting diode. The figure which shows the arrival condition of the light to the distant ship when the lamp buoy of this invention inclines. The figure which shows the arrival condition of the light to the distant ship when the conventional lamp buoy inclines. The perspective view of the conventional lamp buoy lamp. The vertical cross section of the said lamp buoy lamp. The figure which shows the vertical light distribution characteristic of the conventional lamp buoy lamp. The figure which shows the horizontal light distribution characteristic of the conventional lamp buoy lamp.

Explanation of symbols

100, 700 ... Lamp buoy lamp 120 ... Ring-shaped reflector 130, 730 ... Light emitting diode 140, 740 ... Mount 150, 750 ... Hood 152, 752 ... O Rings 154, 754 ... Housing 160, 760 ... Bird guard 720 ... Reflector

Claims (4)

In a lamp buoyancy lamp having an annular saddle-shaped reflector composed of a light emitting diode and a paraboloid,
The light emitting diode is exposed in the insertion hole formed in the bottom portion of the annular saddle-shaped reflector made of the paraboloid from the back side of the annular saddle-shaped reflector so that all the light emitting portions of the light emitting diode are exposed. A light buoy lamp that is mounted.   The luminous intensity emitted from the lamp buoy illuminator has a vertical luminous intensity distribution width of ± 15 ° or more indicating one-tenth of the maximum luminous intensity, and the difference between the maximum luminous intensity and the minimal luminous intensity in the horizontal luminous intensity distribution is 2. The lamp buoy lamp according to claim 1, wherein the lamp buoy lamp is less than 1/15 of the maximum luminous intensity.   3. The lamp buoy lamp according to claim 1, wherein the light-emitting diode is a bullet-type light-emitting diode. 4.   The lamp buoy lamp according to any one of claims 1 to 3, wherein the lamp buoy lamp has a GPS reception function.

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