JP2015179594A - marker lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marker lamp capable of suppressing protrusion height from a ground surface while allowing light from a light emitting element to enter an incident surface of a prism efficiently.SOLUTION: A marker lamp includes: an installation body; a lamp body; a prism 41; and a light source part 42. The installation body is embedded underground. The lamp body has an emission window for emitting light to a lateral side, and is installed at the installation body while the upper side is exposed on the ground surface. The prism 41 includes an incident surface 45 where light enters and an emission surface 46 which emits light entered from the incident surface 45 from the emission window, and is installed inside the lamp body. The light source part 42 includes, in a row shape in a direction crossing the vertical direction along the incident surface 45, a plurality of light emitting elements 51 and parabolic reflection mirrors 52 for performing light distribution control so as to allow the light from the light emitting elements 51 to enter the incident surface 45, respectively.

Description

  Embodiments described herein relate generally to a marker lamp including a light emitting element.

  2. Description of the Related Art Conventionally, for example, on an airport runway or taxiway, an air mark light that is a mark light (recessed illumination light) for guiding an aircraft is installed. This aerial beacon lamp is provided with a lamp body, is embedded in the road surface with the upper part of the lamp body protruding slightly from the road surface, and exits from a light projection window provided sideways on the upper part of the lamp body. Light is emitted through the groove so that it can be seen by the aircraft operator.

  In the case of an embedded aerial beacon lamp, it is preferable that the protruding height from the ground surface is low. However, if the protrusion height is lowered, it is necessary to make the prism disposed in the projection window small. That is, the size of the reflecting mirror or lens used as the optical system is limited.

  In particular, in recent years, a marker lamp using an LED as a light source has been replaced with an existing marker lamp using an incandescent lamp as a light source. Since an LED is a point light source, a lens is generally used so that light is effectively incident on a prism in order to obtain a desired light distribution characteristic. When such a lens is used, it is not easy to suppress the protruding height from the ground surface.

JP 2011-70948 A

  As described above, in a marker lamp using an LED, a configuration that can suppress the protruding height from the ground surface is desired.

  The problem to be solved by the present invention is to provide a marker lamp capable of suppressing the protrusion height from the ground surface while efficiently making the light from the light emitting element incident on the incident surface of the light distribution member.

  The marker lamp of the embodiment includes a housing, a lamp body, a light distribution member, and a light source unit. The housing is embedded in the ground. The lamp body includes an emission window that emits light to the side, and is attached to the casing so that the upper side is exposed to the ground surface. The light distribution member includes an incident surface on which light is incident, and an emission surface that emits light incident from the incident surface from the emission window, and is disposed inside the lamp body. The light source unit includes a light emitting element and a parabolic reflecting mirror that controls light distribution so that light from the light emitting element is incident on the incident surface, and intersects the vertical direction along the incident surface of the light distribution member. Each has a plurality of rows.

  According to the present invention, even if the vertical dimension of the light distribution member in the lamp body is reduced, the light from the light emitting element can be efficiently incident on the incident surface of the light distribution member by the reflector that can be made compact, It can be expected to suppress the protruding height from the ground surface.

It is a perspective view which shows a part of marker lamp of 1st Embodiment. It is a longitudinal cross-sectional view which shows a part of sign lamp same as the above. It is a front view which shows typically the reflective mirror of a marker lamp same as the above. It is a top view of a marker lamp same as the above. A part of marker lamp of 2nd Embodiment is shown, (a) is a perspective view from the light distribution member side, (b) is a perspective view from the light emitting element side. It is sectional drawing which shows a part of sign lamp same as the above. It is a front view which shows typically the reflective mirror of a marker lamp same as the above.

  The configuration of the first embodiment will be described below with reference to FIGS.

  In FIG. 1 to FIG. 4, reference numeral 11 denotes a marker lamp, and this marker lamp 11 is an aerial marker lamp used as a runway lamp or a taxiway lamp, for example. The indicator light 11 is installed on the ground (road surface) 12 such as an airport runway or taxiway 12 and is installed on the ground 12 by being embedded on the ground 12 This is a built-in indicator lamp comprising a lamp body 14 to be used and an optical system 15 disposed on the lamp body 14.

  The installation body 13 is, for example, a cylindrical base with a bottom, a cylindrical spacer for adjusting the embedding depth mounted on the base, and an annular for horizontal axis adjustment mounted on the spacer. The adjustment ring 19 is provided. Then, the installation body 13 is embedded and installed such that the periphery of the upper surface of the adjustment ring 19 is substantially level with the ground 12.

  An opening 20 for fitting the lamp body 14 from above is formed in the center of the adjustment ring 19 so as to penetrate vertically, and a step portion for supporting the lamp body 14 is formed at the periphery of the opening 20. A plurality of bolts 22 for fixing the lamp body 14 are erected from the upper surface of the stepped portion.

  An exit groove 23 is formed on the upper surface of the adjustment ring 19 so as to expand from the center of the adjustment ring 19 in opposite directions. These emission grooves 23 are formed in an inclined shape so that their bottom surfaces rise obliquely from the inner peripheral portion of the adjustment ring 19 toward the outer peripheral portion, and the area of both side surfaces becomes larger as going toward the outer peripheral portion of the adjustment ring 19. It is formed as follows.

  Long holes 24 provided along the circumferential direction are formed at a plurality of locations around the adjustment ring 19 so as to penetrate vertically.

  The adjustment ring 19 is disposed on the spacer via an annular packing (not shown), and is fixed by screwing bolts 26 inserted into the long holes 24 from above into the spacer and tightening them. Also, when tightening each bolt 26, the direction of the lamp body 14 is adjusted by rotating the adjustment ring 19 around the center O with respect to the spacer within the range in which the bolt 26 can move in the long hole 24. It is possible.

  The lamp body 14 is attached to the installation body 13 so that the upper side is exposed to the ground surface. The lamp body 14 is attached to the disk-shaped upper lamp body 32 and the lower surface of the upper lamp body 32 and is located on the installation body 13 side. A lamp cover 33 is provided as a support member. The upper lamp body 32 is formed with a projection window (translucent window) 34 that is an exit window that spreads in the opposite direction from the center of the upper lamp body 32. An exit groove 35 is formed so as to form a continuous shape toward the outer periphery of the body 32. A height H between the upper surface of the upper lamp body 32 and the ground 12 is a protrusion height H of the marker lamp 11 from the ground surface. That is, when the protrusion height H is suppressed, the light projection window 34 becomes small.

  The lamp body 14 is fitted into the opening 20 of the adjustment ring 19 via an annular packing disposed around the lamp cover 33. At this time, a plurality of bolts 22 projecting from the stepped portion of the adjustment ring 19 pass through the lamp body 14, and a nut 37 is screwed and tightened to the upper ends of these bolts 22 so that the lamp body 14 is placed on the adjustment ring 19. It is attached.

  The optical system 15 includes a prism 41 as a light distribution member that is fitted into the light projection window 34 and attached to the inside of the lamp body 14, and faces the prism 41 between the upper lamp body 32 and the lamp cover 33. The light source unit 42 accommodated and a lighting unit (not shown) supported by the lamp cover 33 are provided.

  The prism 41 is made of translucent glass or synthetic resin. The prism 41 has an incident surface 45 that faces the light source unit 42 and receives light, and an exit surface 46 that emits light laterally from the light projection window 34 to the outside of the lamp body 14. Further, a flange portion 48 that is attached to the light projection window 34 via a packing (not shown) protrudes from the outer side of the prism 41. The prism 41 is formed in a longitudinal shape, that is, horizontally long along the horizontal direction, and the projection window 45 is inclined so that the incident surface 45 is inclined downward and the emission surface 46 is inclined upward. Attached to 34. Therefore, the vertical dimension of the exit surface 46 of the prism 41 attached to the light projection window 34 of the lamp body 14 is substantially equal to the protrusion height H. In other words, it is necessary to reduce the size of the prism 41 (light exit surface 46) as the protrusion height H is suppressed.

  The light source unit 42 includes a plurality of light emitting elements 51 that serve as light sources, and a plurality of reflecting mirrors 52 that perform light distribution control so that the light from the light emitting elements 51 is reflected and incident on the incident surface of the prism 41. The lamp body 33 is supported by a bracket 53 as a member. That is, the light source unit 42 is set with an upper light source unit 42a positioned relatively on the upper side and a lower light source unit 42b positioned relatively on the lower side. A bracket 53b is set.

  Each light emitting element 51 is, for example, an LED element or an EL element. When the light emitting element 51 is an LED element, a COD (Chip On Board) method in which a plurality of LED elements are mounted on a substrate and covered with a sealing member containing a phosphor, SMD with a connection terminal on which the LED element is mounted (Surface Mount Device) Any method such as a method of mounting a package on a substrate may be used. Further, each light emitting element 51 is electrically connected to the lighting unit by a lead wire (not shown). Note that the number of the light emitting elements 51 is set corresponding to the required light quantity.

  Each reflecting mirror 52 is formed of a base material formed of, for example, a synthetic resin and a reflecting material such as a metal having a high reflectance such as aluminum covering the surface of the base material. The plurality of reflecting mirrors 52 of each light source unit 42 are integrated with each other to form a reflecting mirror group 57. That is, in the reflecting mirror group 57, an upper reflecting mirror group 57a of the upper light source unit 42a and a lower reflecting mirror group 57b of the lower light source unit 42b are set. Each reflecting mirror 52 includes a reflecting surface 59 that is curved in a rotationally symmetric parabolic shape. And in this embodiment, the reflecting surface 59 of the reflecting mirror 52 of each reflecting mirror group 57 cuts the paraboloid P by a virtual plane P1 including the axis L, and sandwiches the axis L substantially symmetrically. The shape is cut by virtual planes P2 and P2 that are substantially parallel to each other and substantially orthogonal to the virtual plane P1 (FIG. 3). Each reflecting mirror 52 is positioned above each light emitting element 51, and each light reflecting element 51 crosses the axis L at the focal position of the reflecting surface 59 with respect to each reflecting mirror 52. They are arranged so as to emit parallel light in a direction orthogonal to each other.

  The bracket 53 is bent in a substantially L shape including a light emitting element support portion 61 that supports the light emitting element 51 and a reflecting mirror support portion 62 that supports the reflecting mirror 52 (the reflecting mirror group 57) at right angles. The lamp cover 33 is attached. The bracket 53 supports the light source unit 42 so that the axis L of the reflecting mirror 52 is substantially parallel to the normal line of the incident surface 45 of the prism 41. Accordingly, each light emitting element 51 and each reflecting mirror 52 are arranged in a row in the longitudinal direction of the prism 41 along the incident surface 45 of the prism 41 (substantially parallel to the longitudinal direction of the incident surface 45). Yes. The upper bracket 53a causes the upper light source unit 42a to be above the lower light source unit 42b and away from the incident surface 45 of the prism 41, in other words, in the normal direction of the incident surface 45. Along the rear side of the lower light source part 42b, that is, at a position far from the prism 41, and the lower light source part 42b (lower reflector group 57b (reflecting mirror 52 of the lower light source part 42b)) emits light from the upper light source part 42a. It is not located on the optical path of the light emitted from the element 51 and reflected by the upper reflecting mirror group 57a (the reflecting mirror 52 of the upper light source part 42a), that is, emitted from the light emitting element 51 of the upper light source part 42a and reflected from the upper part. The light reflected by the mirror group 57a (the reflecting mirror 52 of the upper light source unit 42a) is not blocked by the lower light source unit 42b (the lower reflecting mirror group 57b (the reflecting mirror 52 of the lower light source unit 42b)). More specifically, the upper end portion of the lower reflecting mirror group 57b (reflecting mirror 52) of the lower light source unit 42b with respect to the normal line from the light emitting surface of the light emitting element 51 of the upper light source unit 42a to the incident surface 45 of the prism 41 is Located below.

  For example, the lighting unit rectifies an AC constant current supplied from a constant current control device, converts it to a predetermined constant voltage, supplies the constant constant voltage to each light emitting element 51, and lights each light emitting element 51.

  In the thus configured marker lamp 11, when the light emitting elements 51 of the light source section 42 (the upper light source section 42a and the lower light source section 42b) are turned on, the light of these light emitting elements 51 corresponds to the respective light emitting elements 51. The incident light enters the reflecting surface 59 of the reflecting mirror 52, is reflected at right angles, and enters the incident surface 45 of the prism 41 as parallel light, and the light totally reflected by the prism 41 passes through the projection window 34 from the exit surface 46. Through the exit groove 35 of the lamp body 14 and the exit groove 23 of the adjustment ring 19 and radiate toward the side of the marker lamp 11.

  Thus, by arranging the light emitting element 51 so as to emit light in a direction intersecting (orthogonal) with respect to the axis L of the reflecting mirror 52, the light emitting element among the paraboloids P constituting the reflecting surface 59. The portion that does not face 51 can be cut, the size of the reflecting mirror 52 can be suppressed, and the light from the light emitting element 51 can be incident on the reflecting mirror 52 more reliably, and the light source section 42 can be made smaller. it can.

  Further, by positioning the upper light source part 42a on the side farther from the incident surface 45 of the prism 41 than the lower light source part 42b, the lower bracket 53b for attaching the lower light source part 42b to the lamp body cover 33 is used as the upper light source. Since the light from the upper light source part 42a toward the incident surface 45 of the prism 41 is not blocked by the lower bracket 53b without being positioned on the optical path of the part 42a, the light loss can be reduced.

  Next, a second embodiment will be described with reference to FIGS. In addition, about the structure and effect | action similar to the said 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the second embodiment, a plurality of pairs of light emitting elements 51 are arranged along the incident surface 45 of the prism 41 (substantially parallel to the longitudinal direction of the incident surface 45). Corresponding to each of the light emitting elements 51, a plurality of pairs of reflecting mirrors 52 are arranged along the incident surface 45 of the prism 41 in pairs (substantially parallel to the longitudinal direction of the incident surface 45). . That is, in the second embodiment, the upper light source unit 42a and the lower light source unit 42b are integrally disposed along the incident surface 45 of the prism 41 at a position that is substantially the same distance from the incident surface 45 of the prism 41. ing.

  In the present embodiment, each reflecting mirror 52 of the upper light source unit 42a and each reflecting mirror 52 of the lower light source unit 42b are integrated to form a reflecting mirror group 65. In this embodiment, the reflecting surface 59 of each reflecting mirror 52 cuts the paraboloid P by a virtual plane P3 spaced from the axis L and substantially parallel to the axis L, and the axis L is substantially omitted. The shape is cut by virtual planes P4 and P4 that are substantially parallel to each other and symmetrically sandwiched between the planes and are orthogonal to the virtual plane P3 (FIG. 7). Further, the reflecting surface 59 of the reflecting mirror 52 of the upper light source unit 42a and the reflecting surface 59 of the reflecting mirror 52 of the lower light source unit 42b are substantially symmetric with respect to the virtual plane P3.

  Further, each light emitting element 51 is arranged so as to emit light toward each focal point of the reflecting surface 59 in a direction intersecting (orthogonal) with respect to the axis L with respect to each reflecting mirror 52. That is, each light emitting element 51 is disposed on the opposite side of the incident surface 45 of the prism 41 with respect to the reflecting mirror 52 (the reflecting mirror group 65). Accordingly, the light emitting elements 51 of the upper light source unit 42a and the light emitting elements 51 of the lower light source unit 42b are arranged substantially symmetrically with respect to the virtual plane P3.

  Then, in the indicator lamp 11 configured in this way, when each light emitting element 51 of the light source unit 42 (the upper light source unit 42a and the lower light source unit 42b) is lit, the light of these light emitting elements 51 is directly or each light emission. The light reflected by the reflecting surface 59 of the reflecting mirror 52 corresponding to the element 51 enters the incident surface 45 of the prism 41 as parallel light, and the light totally reflected by the prism 41 passes through the projection window 34 from the exit surface 46. The light is emitted and irradiated toward the side of the marker lamp 11 through the emission groove 35 of the lamp body 14 and the emission groove 23 of the adjustment ring 19.

  Since the light emitting element 51 has a relatively small light distribution angle, in the second embodiment, by arranging the light emitting element 51 so as to emit light along the axis L of the reflecting mirror 52, Even if the diameter dimension of the paraboloid P constituting the reflecting surface 59 is made smaller, the light from the light emitting element 51 can be reliably incident on the incident surface 45 of the prism 41. Therefore, the vertical dimension of the reflecting mirror 52 can be suppressed, and the light source unit 42 can be further downsized.

  Further, the paraboloid P constituting the reflecting surface 59 of the reflecting mirror 52 is cut by the virtual planes P3, P4, and P4, so that the light from the light emitting element 51 is efficiently reflected, and a large number of reflecting mirrors 52 can be formed. They can be arranged side by side along the incident surface 45 of the prism 41 in a space-saving manner.

  In each of the above-described embodiments, the same number of the reflecting mirrors 52 as the light emitting elements 51 may be provided corresponding to each of the light emitting elements 51, or a reflecting mirror group 57 in which a plurality of predetermined reflecting mirrors 52 are integrally formed in advance. For 65, only the number of light emitting elements 51 corresponding to the required light quantity may be mounted. That is, the number of the reflecting mirrors 52 may be set larger than that of the light emitting elements 51 as long as one reflecting mirror 52 exists for each light emitting element 51. In the case of mounting only the number of light emitting elements 51 corresponding to the required light quantity on the reflector groups 57 and 65 in which a plurality of predetermined reflectors 52 are integrally formed in advance, a plurality of types of indicators having different required light quantities Since the common reflecting mirror 52 (reflecting mirror group 57, 65) can be used for the lamp 11, the cost can be reduced by sharing the parts.

  Further, although the plurality of reflecting mirrors 52 are integrally formed, they may be separately provided.

  Further, the light source unit 42 is not limited to the upper and lower two stages, but may be three or more stages within a range allowed within a predetermined size of the marker lamp 11 or may be provided with only one stage.

  According to at least one embodiment described above, the light emitting element 51 and the parabolic reflecting mirror 52 that controls the light distribution so that the light from the light emitting element 51 is incident on the incident surface 45 of the prism 41 are provided. The vertical dimension of the prism 41 in the lamp body 14 is reduced by providing a plurality of rows in the horizontal direction (longitudinal direction of the prism 41) that intersects the vertical direction along the incident surface 45 of the prism 41. However, the light from the light emitting element 51 can be efficiently incident on the incident surface 45 of the prism 41 by the reflecting mirror 52 that can be made smaller than a lens or the like, and the protrusion height H from the ground surface is suppressed to about 6 mm, for example. it can.

  Further, the light source unit 42 is arranged in a plurality of stages above and below, so that more light from the light emitting elements 51 can be incident on the incident surface 45 of the prism 41, and the light source elements 51 in the form of a point light source are formed. The necessary light quantity can be obtained more reliably while being used.

  Furthermore, the light quantity can be further increased by arranging the plurality of light source units so as not to block each other's light.

  Of the paraboloid P constituting the reflecting surface 59 of the reflecting mirror 52, the direction along the incident surface 45 is cut by the virtual planes P2 and P2 or the virtual planes P4 and P4 so that the light from the light emitting element 51 is removed. A large number of reflecting mirrors 52 can be arranged side by side along the incident surface 45 of the prism 41 in a space-saving manner while efficiently reflecting the emitted light.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

11 Indicator light
12 ground
13 Installation body that is a housing
14 lamp
34 Projection window as the exit window
41 Prism as light distribution member
42 Light source
45 Incident surface
46 Output surface
51 Light emitting element
52 Reflector L axis

Claims (5)

A housing embedded in the ground;
A lamp body that includes an exit window that emits light laterally, and is attached to the housing and the upper side is exposed to the ground surface;
A light distribution member disposed on the inside of the lamp body, including an incident surface on which light is incident, and an emission surface that emits light incident from the incident surface from the emission window;
A plurality of light emitting elements and a parabolic reflecting mirror that controls light distribution so that light from the light emitting elements is incident on the incident surface are arranged in rows in a direction intersecting the vertical direction along the incident surface. A light source section prepared for;
A sign lamp characterized by comprising: The marker lamp according to claim 1, wherein the light emitting element is arranged so as to emit light in a direction intersecting with an axis of the reflecting mirror. The marker lamp according to claim 1, wherein the light emitting element is arranged so as to emit light along the axis of the reflecting mirror. 4. The marker lamp according to claim 1, wherein the light source section is arranged in a plurality of stages in the vertical direction. The marker lamp according to claim 4, wherein the light source unit located on the upper side is located on a side farther from the incident surface of the light distribution member than the light source unit located on the lower side.

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