JP4919074B2 - Recessed beacon light - Google Patents

Description

  The present invention relates to an embedded marker lamp embedded in a road surface.

Conventionally, for example, an embedded beacon lamp such as an air beacon lamp for guiding an aircraft is embedded in a road surface of a runway or taxiway at an airport. This embedded sign lamp is installed with the upper part of the lamp projecting slightly from the road surface, emits light from the exit window formed sideways on the upper part of the lamp, and is visible from the pilot who controls the aircraft. I can do it. A prism is disposed in each exit window of such an embedded marker lamp, and a light source section is disposed behind the prism (see, for example, Patent Document 1).
JP 2004-362977 A (page 9, Fig. 3-4)

  In general, it is desired that such an embedded beacon lamp has a low projecting height of the lamp projecting from the road surface, but it is desired to have a low embedding depth as the outer shape is reduced. In the conventional configuration, it is difficult to reduce the protruding height.

  Therefore, the inventor of the present invention uses a total reflection prism as a configuration that can be miniaturized while lowering the protrusion height and further lowering the embedding depth, and makes the light source, the prism, and the exit window substantially L-shaped. I found the configuration to arrange.

  And in concretely implementing the L-shaped configuration, the prism is disposed in a lamp body used outdoors, so as to be a shock absorber against impact from the outside, It has been found that it is necessary to provide a packing for realizing a liquid-tight state. However, if the packing is simply disposed on the prism, there is a problem that the total reflection characteristics of the reflecting surface of the prism are impaired.

  That is, when the surface facing the reflecting surface of the packing prism is, for example, a black smooth surface, in a state where the packing is disposed between the lamp body and the prism, the smooth surface is in close contact with the reflecting surface of the prism. In this case, the light from the light source is absorbed on the black side of the smooth surface, so that the total reflection characteristic of the prism is greatly impaired.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an embedded marker lamp in which a prism having total reflection characteristics can be suitably used for a lamp body that is required to be liquid-tight.

The embedded beacon lamp according to claim 1 includes: a lamp body having a lamp body; and an exit window that allows light to be emitted toward a side provided on an upper side of the lamp body; A light source disposed; an incident surface on which light from the light source is incident; a reflecting surface that totally reflects light incident from the incident surface; and an exit surface that emits light reflected on the reflecting surface from an exit window; A prism disposed inside the exit window of the lamp body; and having a protection surface that covers the periphery of the prism other than the entrance surface and the exit surface of the prism and includes at least the reflection surface of the prism, the reflective surface opposite to the surface, a region which does not contact than the region in contact with the reflecting surface is formed uneven portion such that many general, a packing disposed between the prism and the light body; the It is characterized by having.

  For example, the embedded marker lamp includes an aerial marker lamp embedded in a road surface such as an airport runway or taxiway, but is not limited thereto, and may be a road marker lamp embedded in a road surface such as a road.

  The exit window may be provided not only in one direction but also in a plurality of directions. The light source is preferably a light-emitting diode that is smaller than other light sources, for example, but is not limited to a light-emitting diode.

  The prism is liquid-tightly attached to the exit window via the packing. However, the arrangement of the prism and the light source is preferable in that the incident direction of light from the light source and the totally reflected light exit from the exit window. The light emitting direction is configured to have a substantially L-shaped relationship. As a result, the optical system elements of the light source, the prism and the exit window are reduced, so that it is easy to arrange the optical system even in a space-saving lamp, and it is possible to reduce the height of protrusion from the ground. Become.

  Note that “total reflection” does not only mean that all light from the light source is reflected, but it is sufficient that light for satisfying desired light distribution characteristics is obtained from the light emitted from the prism. Any light source that can emit most of the light from the light source from the prism may be used.

  In addition, since the degree of the concavo-convex portion on the protective surface of the packing is formed according to desired light distribution characteristics, the size, pitch, and the like are appropriately set by design. It should be noted that a very fine configuration in which the degree of unevenness on the protective surface is close to a smooth surface is not suitable.

  In addition, since the degree of the emitted light from the prism can be adjusted by the degree of the unevenness, there is also an effect that some patterns of the emitted light can be easily obtained by adjusting the unevenness.

  According to the embedded type marker lamp of claim 1, even if the protective surface of the packing is provided on the reflective surface of the prism having the total reflection characteristic, the concave and convex portions are formed on the protective surface. In addition, the total reflection characteristics are not significantly impaired, and therefore, an embedded marker lamp that can easily obtain desired light distribution characteristics without causing problems can be provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show a first embodiment, FIG. 1 is a plan view of an embedded sign lamp, FIG. 2 is a sectional view of the implantable sign lamp, and FIG. It is explanatory drawing which shows the principal part.

  The embedded beacon lamp 11 is, for example, an aerial beacon lamp embedded in a road surface 12 such as an airport runway or taxiway, and a base (not shown) embedded in the road surface 12 and an upper portion of the base The adapter ring 13 is attached to the adapter ring 13, and the lamp body 14 is detachably attached to the upper portion of the adapter ring 13.

  The adapter ring 13 is formed with a bottom 18 and a cylindrical peripheral wall portion 19 erected from the outer peripheral portion of the bottom portion 18, and a storage portion 20 for storing the lamp body 14 by the bottom portion 18 and the peripheral wall portion 19 is upward. An opening is formed. A plurality of mounting holes 21 for attaching bolts (not shown) to the lower base and a plurality of insertion holes 22 for inserting bolts (not shown) for attaching the lamp body 14 from below are formed on the peripheral portion of the bottom 18 respectively. An opening 23 is formed in the center of the bottom 18 so as to communicate with the lower base. A cable for supplying power to the lamp body 14 is wired on the lower base. The upper end of the peripheral wall portion 19 of the adapter ring 13 is embedded and installed at a height that substantially matches the road surface 12.

  The lamp body 14 has a disk-shaped lamp body 26, and a plurality of recesses 27 are formed in the vicinity of the outer periphery of the lamp body 26, and attachment holes 28 are formed at the bottoms of the recesses 27. Then, the lamp body 26 is fitted into the storage portion 20 of the adapter ring 13 through the packing 29, and the bolts protruding from the adapter ring 13 side protrude upward from the mounting holes 28, and nuts (not shown) are screwed into these bolts. The lamp body 14 is liquid-tightly fixed to the adapter ring 13 by tightening together. The upper surface of the lamp body 14 has a convex shape with the central portion protruding slightly upward from the outer periphery, and the outer periphery of the upper surface of the lamp body 14 attached to the adapter ring 13 is the upper end of the peripheral wall 19 of the adapter ring 13 The central portion of the upper surface of the lamp body 14 is disposed so as to protrude slightly above the upper end portion of the peripheral wall portion 19 of the adapter ring 13 and the road surface 12.

On the upper side of the lamp body 26, two exit windows 31 that can emit light toward the sides in opposite directions opposite to each other, and from each exit window 31 toward the outer periphery of the lamp body 26 An emission groove 32 is provided.

  In the lamp body 14, corresponding to each emission window 31, a light emitting diode 36 as a light source, a lens 38 that controls the light distribution of the light from the light emitting diode 36, and light whose light distribution is controlled by the lens 38 And a prism 39 for emitting the light from the emission window 31.

The prism 39 is liquid-tightly fitted from the inside of the exit window 31 through the packing 50 as shown in FIG. 2 , and is held by a press plate 40 attached to the lower surface of the lamp body 26 in this state.

  Then, as shown in FIG. 3A, the prism 39 has an incident surface 41 for receiving light from the lens 38, a reflecting surface 42 for reflecting the incident light, and the reflected light is emitted from the exit window 31. An exit surface 43 is formed. The reflection surface 42 of the prism 39 is formed and arranged so that the light from the lens 38 is substantially totally reflected by the reflection surface 42 of the prism 39. That is, a lens 38 is disposed oppositely below the prism 39, and an incident direction in which light enters the prism 39 from the lens 38 and an exit direction a in which light reflected by the reflecting surface 42 exits from the exit window 31 are substantially L-shaped. Are arranged in a relationship.

  The packing 50 is configured so that the protective surface 51 covers the periphery of the prism 39 other than the incident surface 41 and the exit surface 43 of the prism 39. Then, at least a portion of the protective surface 51 facing the reflecting surface 42 of the prism 39 is a reflecting surface as shown in FIG. 3B, which is an enlarged view of the region A in FIG. A plurality of concavo-convex portions 53 that are partially in contact with the interface 42a of 42 are formed. Further, the interface 42a and the concavo-convex portion 53 of the reflecting surface 42 are configured such that the region 42c that does not contact the concavo-convex portion is generally larger than the region 42b that contacts the concavo-convex portion 53 of the interface 42a. It is.

  In the embedded sign lamp 11 configured as described above, when the light emitting diode 36 is turned on, the light of the light emitting diode 36 is incident on the lens 38, and the light distribution is controlled by the lens 38 to emit the emitted light. The light incident from the incident surface 41 of the prism 39 is totally reflected by the reflecting surface 42 and emitted from the emission surface 43, that is, the light is emitted from the emission window 31 through the emission groove 32 to the side.

  At this time, the prism 39 is substantially surrounded by the packing 50 so as to be liquid-tight, but the protective surface 51 that faces the reflective surface 42 has an uneven portion that partially contacts the interface 42a of the reflective surface 42. Since multiple 53 are formed, the total reflection characteristics of the reflecting surface 42 are not greatly impaired. Therefore, the prism 39 having the total reflection characteristics is effective even for the embedded sign lamp 11 that requires a liquid-tight state. Can be used.

  Further, the interface 42a and the concavo-convex portion 53 of the reflecting surface 42 are configured such that the region 42c that does not contact the concavo-convex portion is generally larger than the region 42b that contacts the concavo-convex portion 53 of the interface 42a. Therefore, for example, even if the packing 50 is black, the light absorbed on the black side can be minimized, and desired light distribution characteristics can be easily obtained.

  Further, by forming a minute gap between the prism 39 and the packing 50 by the concave and convex portion 53 of the packing 50, it is possible to prevent the embedded sign lamp 11 from receiving the external impact to the prism 39. Since the impact can be mitigated by the uneven portion 53 and the gap, the cushioning action of the packing 50 against the prism 39 can be enhanced. This effect is further enhanced by providing the concave and convex portions 53 on all the protective surfaces 51 that cover the prisms 39 of the packing 50.

The top view of the recessed type | mold marker lamp which shows the 1st Embodiment of this invention Cross-sectional view of the above-mentioned recessed marker lamp Explanatory drawing showing the main part of the above-mentioned embedded type marker lamp

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Embedded sign lamp, 14 ... Lamp body, 36 ... Light emitting diode which is a light source, 39 ... Prism, 50 ... Packing

Claims (1)

A lamp body having a lamp body, and an exit window capable of emitting light toward a side provided on an upper side of the lamp body;
A light source disposed in the lamp body;
A light incident surface on which light from the light source is incident; a reflective surface that totally reflects light incident from the incident surface; and an output surface that emits light reflected by the reflective surface from the output window. A prism disposed inside;
A protective surface that covers the periphery of the prism other than the incident surface and the output surface of the prism and includes at least the reflective surface of the prism, and the protective surface is at least a surface that faces the reflective surface and is in contact with the reflective surface A concavo-convex portion is formed so that there are generally more areas that do not contact each other, and packing disposed between the prism and the lamp;
An embedded beacon lamp characterized by comprising:

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