JP2005063782A - Light scattering warning light - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light scattering warning light using a light-emitting diode as a light source, capable of obtaining an intended light intensity. <P>SOLUTION: An LED unit 40 having a base board 41 on which a plurality of light-emitting diodes 42 are arranged is housed in a light-transmitting globe 30, and a lens part 70 narrowing a diffusion angle of the light emitted from the light-emitting diodes is arranged in correspondence with the front of the light-emitting diodes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a novel diffused warning light. Specifically, the present invention relates to a technique for obtaining a desired luminous intensity while using a light emitting diode as a light source.

  Incandescent light bulbs have been used as light sources for diffused warning lights that are mounted on the roofs of emergency vehicles such as police cars, fire fighting vehicles, and ambulance vehicles to warn the presence of emergency vehicles. .

  And in the diffused warning lamp, in order to produce a clearer warning effect, a lighting mode is devised such as repeating blinking or showing the light rotating.

  By the way, in an incandescent light bulb, repeated blinking has a problem of shortening the life of the light bulb, and in order to make the light appear to rotate, a reflecting mirror is provided, and the light is transmitted by rotating the reflection strength. It is necessary to devise such as making it appear to rotate, the structure becomes complicated, the number of moving parts increases, the life of the diffused warning light itself is affected, and maintenance is difficult. It was.

  In order to solve the above-mentioned problems of the diffused warning lamp using an incandescent bulb as a light source, attempts have been made to use a light emitting diode as a light source (see Patent Document 1 and Patent Document 2).

  By making the light source a light-emitting diode, it becomes easy to blink, and it is possible to make the light appear to rotate without providing a mechanical rotating part, extending the life of the light source and maintaining it. Can be realized easily.

JP 2002-245804 A

JP 2002-373504 A

  By the way, the diffused warning light is required to have a light intensity of a predetermined level or more in order to quickly notify an emergency vehicle approaching in a certain direction, for example, the front.

  However, in the light emitting diode, there is a tendency to diffuse the emitted light. For this reason, there is a problem that a high luminous intensity in a specific direction cannot be obtained.

  Therefore, an object of the present invention is to provide a diffused warning lamp so that a desired luminous intensity can be obtained while using a light emitting diode as a light source.

  In order to solve the above-described problem, the diffused warning light of the present invention is provided with a lens portion that acts to narrow the diffusion angle of the light emitting diode in front of the light emitting diode.

  Therefore, in the diffused warning light of the present invention, the original diffusion angle of the light emitting diode is narrowed by the lens portion, so that the luminous intensity of the projected light can be increased to a desired height, and the visibility can be improved. it can.

  The diffused warning lamp of the present invention is a diffused warning lamp in which an LED unit in which a plurality of light emitting diodes are arranged on a substrate is housed in a translucent globe, and the diffusion of the light emitting diodes corresponds to the front of the light emitting diodes. It is characterized in that a lens portion that acts to narrow the corner is provided.

  Therefore, in the diffused warning light of the present invention, the original diffusion angle of the light emitting diode is narrowed by the lens portion, so that the luminous intensity of the projected light can be increased to a desired height, and the visibility can be improved. it can.

  In the invention described in claim 2, the lens unit condenses the light of the light emitting diode into a substantially parallel light beam, and the vertical cylindrical lens diffuses the light of the light emitting diode made into a substantially parallel light beam. Since the vertical cylindrical lens element unit has a desired diffusion angle, it is easy to control the diffusion angle to a desired angle. That is, the design of the vertical cylindrical lens element portion is facilitated.

  In the invention described in claim 3, since a horizontal cylindrical step is provided around the vertical cylindrical lens element portion of the lens portion, the lens portion is controlled by the condensing lens element portion and the vertical cylindrical lens element portion. Light other than light can be diffused in the vertical direction by the horizontal cylindrical step, and visibility at a location close to the vehicle can be improved.

  The best mode for carrying out the diffuse warning light of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows an ambulance as an example of an emergency vehicle equipped with a diffused warning light. FIG. 1 (a) is a plan view and FIG. 1 (b) is a side view.

  For example, diffused warning lights 20, 20, 12, and 12 are mounted on the front end side and the rear side of the roof 11 of the ambulance 10, respectively. The diffused warning lamps 20 and 20 mounted on the front end are arranged so as to wrap around from the side to the front, and the diffused warning lamps 12 and 12 mounted on the rear are mounted in a state of facing sideways. .

  The diffused warning lamps 20 and 20 mounted on the front end portion require a powerful front light distribution 21 and 21 that can be viewed from a distance from the front, and a peripheral distribution that enables the front and the side to be viewed. Lights 22 and 22 are also required. Moreover, the diffused warning lamps 12 and 12 mounted on the rear part require peripheral light distributions 12a and 12a that enable visual recognition from a wide side. Further, in the diffused warning lights 20 and 20 at the front end portion, it is preferable that there are proximity light distributions 23 and 23 for facilitating visual recognition from a position close to the vehicle 10.

  The present invention is applied to the diffused warning lights 20 and 20 mounted on the front end of the vehicle 10.

  The diffused warning lamp 20 is configured by housing an LED unit 40 in a translucent globe 30.

  The translucent globe 30 is formed of a transparent material, for example, transparent plastic, and is formed so as to wrap around from the front portion 31 to the side portion 32 in a substantially L shape. The material of the translucent globe 30 is transparent, but is usually colored and transparent, for example, the one mounted on the ambulance vehicle 10 is formed to be red and transparent.

  The LED unit 40 is formed by arranging a large number of light emitting diodes 42, 42,. In this embodiment, the LED unit 40 is integrated with a case-shaped lens unit 50 to form a light scattering unit 60.

  The lens unit 50 is formed of a transparent material, for example, a transparent plastic and is formed in a box shape that is long in the horizontal direction and has an open rear end, and a lens portion 70 is formed on the front surface portion 51. Both end portions in the horizontal direction of the peripheral wall portion 52 of the lens unit 50 have a shape in which the upper and lower end portions are recessed except for the rear end, thereby mounting pieces 53, 53,... Facing forward toward the rear end portion. Are formed, and screw insertion holes 53a, 53a,... Are formed in the mounting pieces 53, 53,. In addition, mounting bosses 54 and 54 project from the positions near the left and right ends of the front portion 51 toward the rear.

  The lens unit 70 mainly performs an action of narrowing the diffusion angle of the light emitting diode 42. The lens unit 70 that collects the light of the light emitting diode 42 into a substantially parallel light beam and the light collecting lens element unit 71 provide a substantially parallel light beam. The vertical cylindrical lens element unit 72 is provided for diffusing the light of the light emitting diode 42 in the horizontal direction. The condensing lens element portion 71 is formed in a circular area on the inner surface of the front surface portion 51, and is constituted by Fresnel lens steps 71a, 71a,... (See FIGS. 4 and 5). The vertical cylindrical lens element portion 72 is formed at a position corresponding to the condenser lens element portion 71 on the outer surface of the front surface portion 51, and is configured by a plurality of vertical cylindrical steps 72a, 72a,. . In this embodiment, a plurality of portions extending in the horizontal direction are provided on the outer surface of the front surface portion of the lens unit 50 other than the portion where the vertical cylindrical lens element portions 72, 72,... Are formed. Horizontal cylindrical steps 73, 73,... Are formed.

  The LED unit 40 is screwed to the mounting bosses 54, 54 with the light emitting diodes 42, 42,. The light emitting diodes 42, 42,... Are positioned opposite to the centers of the condenser lens element portions 71, 71,. As described above, the diffuser unit 60 is formed.

  The operation of the above-described light scattering unit 60 will be described with reference to FIG. The light emitted from the light emitting diode 42 is made into a substantially parallel light beam by the condenser lens element unit 71, and the light made into the substantially parallel light beam is diffused at a predetermined angle by the vertical cylindrical lens element unit 72. In this embodiment, the condensing lens element unit 71 receives light in the range θ1 of about 60 ° out of the light emitted from the light emitting diode 42, and the condensing lens element unit 71 substantially receives this light. After the parallel light beam is formed, the vertical cylindrical lens element portion 72 diffuses it at an angle θ2 of about 25 ° in the horizontal direction. Although the diffusion angle of the light emitted from the light emitting diode is 60 ° or more, it can be practically used from the maximum light intensity to the part where the light intensity is about ½, and the light in the above range can be used as light to be emitted forward. However, the range in which all the light emitting diodes have a luminous intensity of about ½ from the maximum luminous intensity is not necessarily 60 °, and the range from the highest luminous intensity to the luminous intensity of about ½ is forward. Since it is not necessarily optimal to use as irradiation light, the technical scope of the present invention is not limited by the angle θ1. Further, the diffusion angle θ2 of the finally emitted light is not limited to 25 °, and should be appropriately set as necessary.

  In the diffused warning lamp 20, the visibility from the range of about 90 ° from the front to the side is improved by arranging five diffused units 60 in the translucent globe 30. In addition, strong irradiation light can be obtained forward.

  As can be clearly seen in FIGS. 2 and 3, a mounting table 80 is fixed in the translucent globe 30. The mounting table 80 is formed of a metal plate, and includes a base portion 81 and two mounting plates 82 and 83 erected on the base portion 81. The base part 81 includes a base part 81a and leg parts 81b and 81b projecting downward from both front and rear edges of the base part 81a. The leg parts 81b and 81b are fixed on the bottom surface part 33 of the translucent glove 30. Is provided. Each of the mounting plates 82 and 83 has a square shape when viewed from above, and the bending angle of the mounting plate 82 positioned on the front side is larger than the bending angle of the mounting plate 83 positioned on the back side. The height of the mounting plate 83 located on the side is approximately twice the height of the mounting plate 82 located on the near side. Fixing pieces 82 a, 82 a, 83 a, 83 a protrude from the lower end edge of the mounting plates 82, 83 toward the back side, and these fixing pieces 82 a, 82 a, 83 a, 83 a are base parts 81 a of the base part 81. The mounting plates 82 and 83 are erected on the base portion 81 by being screwed to the base portion 81. Then, one on the front side of the leg part 81b on the front side of the base part 81 and one on each of the mounting parts 82b and 82b connected in a square shape on the front side mounting plate 82, respectively. A total of five diffuser units 60, 60,..., One for each of the attachment portions 83b, 83b connected in the shape of 83, are screw insertion holes 53a of the lens units 50, 50,. Are fixed by screws 61, 61,... Inserted through 53a,.

  By arranging the five light scattering units 60, 60,... As described above, the range visually recognized by each light scattering unit 60 is narrow, but as a whole, a wide angle range can be covered. Moreover, the light emitting diode 42 here is irradiated forward with the original diffusion angle narrowed, so that high visibility can be obtained.

  In the above-described diffused warning lamp 20, the horizontal cylindrical steps 73, 73,... Are formed around the vertical cylindrical lens element portion 72 in the lens unit 50. Proximity for facilitating visual recognition from a position close to the vehicle 10 shown in FIG. 1 (b), in which light outside the angular range of 60 ° is diffused vertically by the horizontal cylindrical steps 73, 73,. It functions as the light distribution 23, 23.

  In the above description, the diffused warning light 20 mounted on the right side in the traveling direction of the front end portion of the ambulance 10 has been described, but the diffused warning light 20 mounted on the left side is as described above. It differs in that it has a symmetrical structure, and the other points are the same.

  In addition, the shape and structure of each part shown in the above-described best mode are merely examples of implementations in carrying out the present invention, and these limit the technical scope of the present invention. It should not be interpreted in a general way.

  In the present invention, since a desired luminous intensity can be obtained while using a light emitting diode as a light source in a diffused warning lamp, it contributes to the practical use of a diffused warning lamp using a light emitting diode as a light source.

The drawings show the best mode for carrying out the diffused warning light of the present invention. The drawings illustrate an emergency vehicle, (a) is a plan view, and (b) is a side view. . It is a top view which cuts and shows a translucent glove. It is a perspective view which shows the example of arrangement | positioning of the diffuser unit provided with the LED unit. It is a front view of a diffuser unit. It is sectional drawing which follows the VV line of FIG. It is a light trace figure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 ... Diffuse warning light, 30 ... Translucent globe, 40 ... LED unit, 41 ... Board | substrate, 42 ... Light emitting diode, 70 ... Lens part, 71 ... Condensing lens element part, 72 ... Vertical cylindrical lens element part, 73 ... Horizontal cylindrical step

Claims (3)

A diffused warning lamp in which an LED unit in which a plurality of light emitting diodes are arranged on a substrate is housed in a translucent globe,
A diffused warning lamp characterized in that a lens portion that acts to narrow the diffusion angle of the light emitting diode is disposed in front of the light emitting diode. The lens part is composed of a condensing lens element part for condensing the light of the light emitting diode into a substantially parallel light beam and a vertical cylindrical lens element part for diffusing the light of the light emitting diode made into a substantially parallel light beam,
The diffused warning lamp according to claim 1, wherein a desired diffusion angle is set by the vertical cylindrical lens element portion. The diffused warning lamp according to claim 2, wherein a horizontal cylindrical step is provided around a vertical cylindrical lens element portion of the lens portion.

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