JP2023049519A - Lighting device - Google Patents

Abstract

To provide a lighting device which achieves large flexibility of the layout and design of the entire device and enables downsizing and weight reduction and which may receive a resin optical component without fail even if the optical component is melted to eliminate a possibility that the melted optical component drops to the outside and thereby improve safety.SOLUTION: A lighting device includes: a case 11; a light source 20 which emits light from the inside of the case 11 to the outside; and a lens 30 which is fixed to the light emission side of the light source 20 and allows the light to pass therethrough. An attachment part 14 to which the light source 20 is attached is provided inside the case 11. A space defined by the attachment part 14 in the case 11 serves as a melting receiving part 17 which may receive the melted lens 30 when the lens 30 is melted and drops.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general-purpose lighting device, and is used for indirect lighting, for example, by installing it on the ceiling in the cabin of a railway vehicle.

2. Description of the Related Art Conventionally, various types of lighting devices attached to the ceiling of a passenger room, for example, have been known as room lights used in passenger rooms of railway vehicles, aircraft, automobiles, and the like. Recently, lighting devices are increasingly adopting LEDs instead of fluorescent lamps as light sources, and the mainstream is to illuminate the interior of a passenger room with indirect light instead of direct light.

For example, in Patent Document 1, a light guide rod with an LED as a light source is housed in the housing, and the light emitted from the light guide rod is transmitted through the side wall portion of the housing and radiated into the vehicle interior as it is. A lighting device is disclosed in which light that travels obliquely upward from the vehicle is reflected by the ceiling and is irradiated into the vehicle interior as indirect light.

In such a lighting device, the optical parts such as the light guide rod through which light passes and the side wall of the housing are made of highly transparent synthetic resin. However, if a synthetic resin is used for the parts of the lighting device attached to the ceiling in the passenger room, there is a possibility that the synthetic resin will melt and drip in the event of a fire. Therefore, in the case of railway vehicles, the use of synthetic resin parts in a situation where they melt and drip is restricted by law.

Therefore, non-combustible and translucent glass is used as the material for the optical parts in the lighting equipment of railway vehicles. There was the additional problem of being thick and leading to weight gain. Moreover, glass is more difficult to process than synthetic resin, and not only is the material cost expensive, but there is also the problem of safety against cracking.

In view of the above problems, the applicant of the present application has disclosed, for example, in Patent Documents 2 to 4 that even if an LED, which is a light source, and a protective cover are provided inside a casing, and the protective cover is molded from a synthetic resin, the melted material will remain in the case. A lighting device has already been proposed in which, even if the protective cover is melted, there is no fear of leakage downward by providing a receiving portion. In these lighting devices, the distribution of light transmitted through the protective cover is controlled by a reflecting surface formed inside the casing itself.

JP 2009-96388 A JP 2012-17090 A JP 2013-91472 A JP 2014-49263 A

Improvements have been desired in order to solve the following new problems in the conventional lighting devices described in Patent Documents 2 to 4 described above. That is, the case is designed based on the shape of the reflector in order to control the light distribution by using the inside of the case itself as the reflector. Therefore, there is a problem that the design of the entire case and the degree of freedom in design are significantly restricted, the external dimensions of the entire device are increased, and the weight is increased.

In addition, in the conventional lighting device, by providing a structure for receiving molten materials, it became possible to mold optical parts with synthetic resin instead of glass, and the weight and safety measures were accordingly excellent. However, depending on the size of the optical component, there is a possibility that the capacity of the space for receiving the molten material may not be sufficient.

The present invention has been made by paying attention to the problems of the prior art as described above. To provide a lighting device capable of reliably receiving even if melted, without fear of dripping to the outside, and enhancing safety.

In order to achieve the aforementioned objects, one aspect of the present invention is
A lighting device having a case, a light source that emits light from the inside of the case to the outside, and an optical component that is fixed to the light emission side of the light source and allows light to pass through,
A mounting portion for mounting the light source is provided inside the case,
A space defined by the mounting portion in the inside of the case serves as a melt receiving portion that can receive the melt dripping of the optical component.

According to the lighting device according to the present invention, the degree of freedom in the design and design of the entire device is large, and miniaturization and weight reduction are possible. It is possible to improve the safety without fear of the accident.

FIG. 6 is a vertical cross-sectional view (enlarged cross-sectional view taken along the line AA of FIG. 5) of the lighting device according to the first embodiment; It is a longitudinal cross-sectional view which shows the assembly work of the illuminating device which concerns on 1st Embodiment. It is a perspective view showing the state where a part of lighting installation concerning a 1st embodiment was disassembled. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the illuminating device which concerns on 1st Embodiment. It is a top view which shows the illuminating device which concerns on 1st Embodiment. It is a front view which shows the illuminating device which concerns on 1st Embodiment. It is a side view which shows the edge part of the illuminating device which concerns on 1st Embodiment. It is an explanatory view showing light distribution control of the lighting installation concerning a 1st embodiment. FIG. 12 is a vertical cross-sectional view (enlarged cross-sectional view taken along the line BB in FIG. 11) of the lighting device according to the second embodiment; It is a top view which shows the illuminating device which concerns on 2nd Embodiment. It is a front view which shows the illuminating device which concerns on 2nd Embodiment.

Various embodiments representing the present invention will be described below with reference to the drawings.
[First embodiment]
1 to 8 show a first embodiment of the invention.
As shown in FIG. 1, the illumination device 10 includes a case 11, a light source 20 that emits light from the inside of the case 11 to the outside, and an optical component 30 that is fixed on the light emission side of the light source 20 and transmits light. , has Note that the constituent elements, shapes, and the like shown in the embodiments described below are all examples of the present invention, and do not limit the present invention.

<Overview of lighting device 10>
Although the illumination device 10 according to the present embodiment is a versatile lamp unit, a case where it is applied to an interior lamp of a railway vehicle will be described below as an example. That is, the lighting devices 10 are installed on the ceiling 1 (see FIG. 8) in the passenger compartment of the railway vehicle, and for example, a pair of lighting devices are installed in parallel in the longitudinal direction of the vehicle. Here, the lighting device 10 provides indirect lighting that softly illuminates the interior of the passenger room from the ceiling 1. - 特許庁

As shown in FIG. 8, the lighting device 10 is arranged in a substantially horizontal state facing the ceiling 1 with a predetermined distance therebetween, and irradiates the ceiling 1 with light. The lighting device 10 performs light distribution control by an optical component 30, which will be described later, in place of the reflector, and uses the ceiling 1 as it is as the reflector. The lighting devices 10 are combined and arranged so that they are arranged in a line in the longitudinal direction according to the required length.

<About case 11>
As shown in FIGS. 3 to 6, the case 11 is a container forming the outer shell of the illumination device 10, and related parts such as the light source 20 are accommodated inside. The case 11 has, for example, a long shape extending in the longitudinal direction, and is formed into a bottomed uniform groove-like cross section with an open upper surface side. Such a case 11 is extruded from a metal such as aluminum. If the case 11 is made of metal with high thermal conductivity such as aluminum, it functions as a heat sink for dissipating the heat generated by the light source 20 .

As shown in FIG. 1, more specifically, the case 11 comprises a bottom wall 12 extending like a narrow plate, and side walls 13, 13 rising from both edges of the bottom wall 12 to a predetermined height and facing each other. A mounting portion 14 extending in the longitudinal direction is integrally provided on the inner surface of the bottom wall 12 . The case 11 does not have a function as a reflecting surface for reflecting light from the light source 20, which will be described later. As will be described later, the case 11 is arranged with its top opening facing upward, and is attached to the ceiling 1 in a suspended state via an end cap 40 .

The height direction of the case 11 is orthogonal to the longitudinal direction of the case 11 and parallel to the direction from the center of the top opening of the case 11 toward the center of the bottom wall 12 . Both sides of the case 11 are perpendicular to the longitudinal direction of the case 11 and parallel to the direction from the center of one side wall 13 to the center of the other side wall 13 of the case 11 . Engagement portions 18 for fixing the optical component 30 are provided on the inner surfaces of the side walls 13, 13, although the details will be described later.

<<Mounting portion 14 of case 11>>
The mounting portion 14 is a portion for mounting the light source 20 inside the case 11 . As shown in FIG. 1, the bottom wall 12 is formed with a long groove 14a that is recessed inward from the outside along the longitudinal center thereof. It has become. An upper end of the mounting portion 14 is formed as a flat mounting surface 15 for mounting a substrate 21 of the light source 20 described later along the longitudinal direction thereof. The mounting surface 15 serves as a reference surface for the mounting portion 14 , and upward flanges 16 are formed along both side ends of the mounting surface 15 .

As shown in FIG. 1, the width of the mounting surface 15, that is, the dimension between the two flanges 16, 16 is set slightly larger than the width of the substrate 21 of the light source 20, which will be described later. Moreover, the upper end of the mounting portion 14, more specifically, the upper ends of both flanges 16 and 16 as well as the mounting surface 15 are positioned slightly below the upper ends of the side walls 13 and 13 that form the top open ends of the case 11. is set. Further, both ends of the mounting portion 14, that is, both ends of both flanges 16, 16 are located closer to the center of the case 11 than the inner surfaces of both side walls 13, 13 of the case 11, and the gap between them is a melting receiver, which will be described later. It becomes the entrance of part 17. Both flanges 16, 16 correspond to first positioning means for positioning the substrate 21 mounted on the mounting surface 15 in both directions (one direction of the present invention).

<<Melting Receptacle 17 of Case 11>>
A space defined by the mounting portion 14 in the inside of the case 11 serves as a melt receiving portion 17 that can receive when an optical component 30 (to be described later) melts and drips. That is, the space below the open end of the upper surface of the case 11 is partitioned by the mounting portion 14 protruding from the inner surface of the bottom wall 12, and when the optical component 30 melts and drips, the space is filled with the molten material. set to accept. Therefore, the melt receiving portion 17 preferably has a volume corresponding to the total integral when the optical component 30 is liquefied.

In this embodiment, as shown in FIG. 1, the mounting portion 14 protrudes along the center of the longitudinal direction of the bottom wall 12, so that the mounting portion 14 is divided into left and right halves inside the case 11. It partitions the receiving portion 17 . The two melt receivers 17 have the same cross-sectional shape and capacity, and each can receive the melt of the optical component 30 . Here, the melt receiving portion 17 is positioned below the light source 20 mounted on the mounting portion 14 . The upper end (entrance) of the melt receiving portion 17 is open as a gap between both ends of the mounting portion 14 and the inner surfaces of the side walls 13, 13 of the case 11, as described above.

<About the light source 20>
As shown in FIG. 3, the light source 20 emits light in a predetermined direction, and an LED is suitable as the light emitting element. The light source 20 is formed by, for example, arranging surface-mounted LED chips 22 in a line at predetermined intervals (for example, 10 mm) on a substrate 21 extending in a narrow width. Since the structure of the LED chip 22 itself is general, detailed description is omitted. Used. Here, the optical axis L of the LED chip 22 coincides with the vertical direction.

A wiring pattern to which the LED chip 22 is electrically connected is formed on the mounting surface of the substrate 21 . The color of light emitted from the LED chip 22 can be arbitrarily selected, and it is not limited to a single color, and a plurality of colors of light may be appropriately combined. Also, the LED chip 22 may employ a full-color LED capable of emitting light of any color by mixing three primary colors. The light-emitting element of the light source 20 is not limited to the surface-mounted LED chip 22, and may be an LED lamp in which a chip is embedded in a dome-shaped mold.

At both ends of the mounting surface of the substrate 21, connectors 23 are provided for connecting wiring from the power supply device 50 (see FIG. 7) or the adjacent light source 20. As shown in FIG. Here, the connector 23 protrudes upward from the mounting surface, and is set so as to fit into second positioning means provided in the optical component 30, which will be described later. That is, the light source 20 is set so as to be positioned in the longitudinal direction (the other direction of the present invention) with respect to the optical component 30 when the optical component 30 is overlaid.

<Regarding the optical component 30>
The optical component 30 passes the light emitted from the light source 20 and is fixed to the case 11 while facing the light emitting side of the light source 20 . The optical component 30 corresponds to, for example, a lens and a protective cover, all of which are made of translucent material. The optical component 30 according to the present embodiment corresponds to, for example, a lens (hereinafter also referred to as “lens 30”) made of a transparent resin material such as acrylic or polycarbonate.

The lens 30 controls light distribution of the light emitted from the light source 20, and is formed in a long shape extending in the longitudinal direction along the top opening of the case 11, for example. Here, the total length of the lens 30 does not necessarily have to match the total length of the case 11, and in this embodiment, two lenses 30 are combined in a row with respect to one case 11. FIG. Note that the length of the light source 20 is also the same.

As shown in FIG. 8, more specifically, the lens 30 has a flat bottom surface 31 facing the light emitting side of the light source 20 and a recess along the center of the bottom surface 31 in the longitudinal direction. It comprises an entrance surface 32 with a semicircular cross section for incidence, and an exit surface 33 forming an outer periphery on the opposite side of the bottom surface 31 for exiting light to the outside. Further, the boundary between the bottom surface 31 of the lens 30 and the exit surface 33 is both side end portions 34, 34 projecting in the width direction.

Engageable portions 35 for fixing to the inner surfaces of the side walls 13, 13 of the case 11 are provided on the end faces of the side end portions 34, 34, although the details will be described later. Also, the bottom surface at both ends of the lens 30 is provided with cutouts 36 that match and cover the connectors 23 at both ends of the substrate 21 of the light source 20 when the lens 30 is overlaid on the substrate 21 . Here, the notch 36 corresponds to second positioning means for positioning the light source 20 in the longitudinal direction (the other direction of the present invention) with respect to the superimposed lens 30 .

The exit surface 33 of the lens 30 in this embodiment has a concave curved surface 33a that is shallowly depressed along the center of the outer circumference, and convex curved surfaces 33b, 33b that form mountains on both sides of the concave curved surface 33a. The center of the lens 30 , that is, the center of the concave curved surface 33 a is located on the optical axis of the LED chip 22 . The concave curved surface 33a and the convex curved surfaces 33b, 33b on both sides are continuous without being partitioned by a substantial boundary. Specific light distribution control by such a lens 30 will be described later.

<Assembly Structure of Lens 30 and Light Source 20>
As shown in FIG. 2, the lens 30 is connected to the inner surface of the case 11 by engaging the engaging portion 18 provided on the case 11 with the engaged portion 35 provided on the lens 30, so that the light source It is fixed to the case 11 in a state where it is sandwiched between the mounting portion 14 and the mounting portion 14 . Here, as an opposite mode, the case 11 may be provided with the engaged portion 35 and the lens 30 may be provided with the engaging portion 18 .

The engaging portions 18 of the present embodiment are provided on the upper inner surfaces of the side walls 13 of the case 11 as ridges having a semicircular cross section that protrude inward and extend in the longitudinal direction. On the other hand, the engaged portions 35 of the present embodiment are recessed inwardly on the end surfaces of the both side end portions 34 of the lens 30 and extend in the longitudinal direction. provided as grooves.

When the substrate 21 of the light source 20 is positioned on the mounting surface 15 of the mounting portion 14 and the lens 30 is pushed into the upper opening of the case 11 in a substantially horizontal posture, the engaging portion 18 is engaged with the engaged portion 35 . Together, the lens 30 is configured to be fixed to the case 11 together with the light source 20 . Here, the case 11 is made of metal, but both side walls 13, 13 are elastically deformable to some extent so as to expand each other.

<Regarding the end cap 40>
As shown in FIG. 3 , the lighting device 10 includes an end cap 40 that is a terminal member attached to the end of the case 11 . Specifically, the end cap 40 has a cap body 41 and a fixing piece 42 . The inside of the cap main body 41 substantially conforms to the cross-sectional shape of the case 11, and is formed in a shape surrounding the bottom wall 12 at the end of the case 11, the side walls 13, 13, and the terminal opening. Therefore, the end cap 40 can be externally fitted so as to cover the end of the case 11 .

The bottom surface of the cap body 41 can be screwed to the bottom wall 12 of the case 11 . That is, the bottom of the cap body 41 has a screw hole (not shown), and the tip of the screw 43 inserted through this screw hole is screwed into the nut 44 in the long groove 14a in the bottom wall 12 of the case 11. can be done. Here, the long groove 14a is formed to have a dovetail groove-like cross section that matches the shape of the tip of the nut 44 and the screw 43 when viewed from the front. Therefore, the nut 44 will not fall off from the middle of the long groove 14a. The nut 44 can be inserted into the long groove 14a from the open end of the long groove 14a at the end of the case 11. As shown in FIG.

The end cap 40 also serves as a bracket for supporting the lighting device 10 on the ceiling 1 where it is installed. That is, by screwing the fixing piece 42 of the end cap 40 to the ceiling 1, the case 11 is arranged with its top opening facing upward, and is suspended with a predetermined gap between it and the ceiling 1. can support If the end cap 40 is also made of a material with excellent thermal conductivity, such as aluminum, like the case 11, it will serve as a heat sink for dissipating the heat generated by the LED chip 22 of the light source 20.

<Regarding the power supply device 50>
As shown in FIG. 7 , the space inside the case 11 where the mounting portion 14 is not provided serves as a power source housing portion capable of housing a power source device 50 that supplies power to the light source 20 . In other words, a wide space for the power source containing portion including the fusion receivers 17 on both sides can be secured in the place where the mounting portion 14 is not provided inside the case 11 .

The power supply device 50 is configured as a unit in which an AC/DC converter, a capacitor, a resistor, etc. are mounted on a power supply substrate, for example, and is connected to a commercial power cable (not shown), the connector 23 of the light source 20, etc. via a cable. . In addition to the power supply device 50, the power supply housing may also house a control device (not shown) for controlling the lighting drive of the light source 20, or the power supply device 50 may incorporate the control device. good.

The operation of the illumination device 10 according to the first embodiment will be described below.
<Assembly of lighting device 10>
First, when assembling the illumination device 10, as shown in FIG. . At this time, the substrate 21 of the light source 20 is positioned so as not to move in both directions by the flanges 16 on both sides of the mounting surface 15 and is not displaced to both sides of the mounting surface 15 . Here, the light source 20 only needs to be positioned on the mounting portion 14 and does not need to be fixed by adhesion or the like.

Subsequently, the lens 30 is fitted over the light source 20 through the top opening of the case 11 . Then, both side walls 13, 13 of the case 11 are elastically deformed so as to expand slightly, and both side ends 34, 34 of the lens 30 enter the inside of the case 11, and the engaging portion 18 on the case 11 side moves to the lens 30 side. engages with the engaged portion 35 of the . As a result, the lens 30 is fixed to the case 11 in a state in which the light source 20 is immovably held between the lens 30 and the mounting portion 14 .

At this time, the lens 30 is fixed to the case 11 while facing the light emitting side of the light source 20 . That is, the bottom surface 31 of the lens 30 abuts on the substrate 21 of the light source 20 , and the LED chip 22 is housed in a recess of semi-circular cross-section that defines the entrance surface 32 of the lens 30 . Further, since the connector 23 on the substrate 21 of the light source 20 fits into the notch 36 of the lens 30, the light source 20 is positioned so as not to shift in the longitudinal direction with respect to the lens 30 as well. If the light source 20 and the lens 30 are shorter than the total length of the case 11, it is preferable to combine a plurality of them in one row.

As described above, by using the engagement relationship between the engaging portion 18 and the engaged portion 35 for fixing the lens 30 to the case 11, screwing and bonding work as in the prior art are not required, and the number of parts is reduced. and assembly man-hours are reduced. Moreover, when the lens 30 is fixed to the case 11, the light source 20 can also be fixed at the same time. Therefore, the illumination device 10 can be assembled without tools without using screws. In particular, since the lens 30 is fitted from above, it does not require a large work space and can be assembled within the range of the workbench.

Next, as shown in FIG. 3, end caps 40 are attached to both ends of the case 11 . Here, the end cap 40 is screwed to the bottom surface of the cap main body 41 using the long groove 14 a in the bottom wall 12 of the case 11 while being fitted over the end of the case 11 . That is, by screwing a screw 43 inserted through the bottom surface of the cap main body 41 into a nut 44 in the long groove 14a in the bottom wall 12 of the case 11, the end cap 40 is attached to the end of the case 11 so as not to come off. can be fixed.

<Installation of lighting device 10>
As shown in FIG. 4, the completed lighting device 10 is installed, for example, on the ceiling 1 (see FIG. 8) in the cabin of a railway vehicle. In order to install the lighting device 10 on the ceiling 1, the fixing piece 42 of the end cap 40 is fastened with fasteners such as bolts while the bottom wall 12 of the case 11 is supported from below by the cap body 41 of the end cap 40. By fixing to the ceiling 1 , the lighting device 10 is installed immovably with respect to the ceiling 1 .

As shown in FIG. 8, the case 11 is arranged with its top opening facing the ceiling 1 and is supported in a suspended state with a predetermined gap between it and the ceiling 1 . Here, the longitudinal direction and both side directions of the case 11 are parallel to the horizontal direction like the ceiling 1, and the height direction is parallel to the vertical direction. In addition, since the illumination device 10 does not depend on the shape of the ceiling 1 where it is installed, the case 11 may have only one uniform cross-sectional shape. Since the case 11 can be easily extruded from a metal such as aluminum, the manufacturing cost can be reduced.

In this way, the lighting device 10 does not require processing after assembly due to its structure, so that the costs for processing jigs can be reduced. In addition, when replacing the lighting device already installed on the ceiling 1 and remodeling it, the end cap 40 is used as a mounting bracket as it is, so there is no need to process the lighting device 10 for mounting on the ceiling 1. Become. The illumination device 10 can be extended to a desired length by sequentially connecting a plurality of units.

In particular, the lighting device 10 can be made compact overall by omitting the conventional reflector from the case 11, and can be easily attached to the ceiling 1 together with its weight reduction. be able to. For example, a conventional lighting device requires at least two people to install it, but the lighting device 10 can be easily lifted and mounted on the ceiling 1 by one person due to its reduced size and weight. Further, by reducing the size of the illumination device 10, it is possible to obtain an optical illusion effect that makes the ceiling space appear wider.

Furthermore, the appearance of the lighting device 10 in this embodiment, that is, the appearance of the case 11 viewed from below is extremely simple. It is possible to improve the open guest room space and design. As a result, it is possible not only to enhance the presentation effect of the lighting in the passenger compartment of the vehicle, but also to utilize it as a general-purpose lighting device design.

<Light Distribution of Lighting Device 10>
In the lighting device 10 supported on the ceiling 1 , light emitted from the light source 20 is directed toward the ceiling 1 through the lens 30 . Therefore, the ceiling 1 is illuminated, and the interior of the passenger compartment is indirectly illuminated by the light reflected from the ceiling 1 . Here, the LED chips 22 of the light source 20 are arranged in a row on the substrate 21, and the optical axis L (see FIG. 8) of each LED chip 22 is vertically aligned. Light emitted from each LED chip 22 is subjected to light distribution control in the process of entering the incident surface 32 of the lens 30 located vertically above and reaching the emitting surface 33 .

As shown in FIG. 8, the lens 30 according to the present embodiment has a concave curved surface 33a that is shallowly depressed in the center of the output surface 33, and convex curved surfaces 33b and 33b forming mountains on both sides of the concave curved surface 33a. Light is irradiated in a wide span direction as indicated by the dashed line in FIG. Such light distribution control of the lens 30 can widen the light distribution in the direction of both sides of the vehicle (in the direction of the sleeper) in the passenger compartment. In this manner, various light distribution controls can be realized by passing the light from the light source 20 through the lens 30 . It is also possible to enhance the illumination effect of illumination by making the colors of light emitted by the LED chips 22 different or controlling light emission by changing the colors of light emitted by the LED chips 22 .

<Countermeasures against Molten Dripping of Lighting Device 10>
Assuming that the illuminating device 10 is installed in a passenger compartment of a railway vehicle, the lens 30 can be made of a synthetic resin. That is, the space inside the case 11 defined by the mounting portion 14 of the light source 20 is used as a melt receiving portion 17 that can receive the melt dripping of the lens 30 . Therefore, even if the lens 30 is made of a synthetic resin and melts, the melted material can fall into the melt receiving part 17 defined by the mounting part 14 and stay in the melt receiving part 17. There is no danger of dripping down the passenger compartment.

As a result, the lens 30 can be made of synthetic resin, which is easy to process, tough and inexpensive, as a material that can be melted and dropped. In addition, even if the lens 30 actually melts, it is received by the melt receiving portion 17 so that there is no fear of dripping, and it is possible to use the lens 30 as a material for railway vehicles as in the present embodiment. Therefore, compared with the case where glass is used as the material of the lens 30, it is possible to achieve weight reduction, and the lens 30 does not break like glass, so safety can be improved.

In particular, in the lighting device 10, as shown in FIG. are respectively referred to as melt receivers 17 . As a result, two independent wide areas inside the case 11 serve as the melt receiving parts 17, and when the lens 30 should melt, the melt can be reliably received and retained so as not to leak. Of course, the melt receiver 17 is not limited to the melt of the lens 30, and can also receive fragments and the like when related parts such as the light source 20 are damaged.

Moreover, the melt receiving portion 17 in this embodiment is located below the light source 20 mounted on the mounting portion 14 inside the case 11 as shown in FIG. According to such a positional relationship, the melted material of the lens 30 does not accumulate near the light source 20 on the mounting portion 14 and stays below the light source 20 . This also makes it possible to prevent the melt from being further heated by, for example, the heat emitted by the light source 20 .

[Second embodiment]
9-11 show a second embodiment of the invention.
The illumination device 100 according to the present embodiment has a basic configuration in common with the illumination device 10 according to the first embodiment described above, but the case 111, the melt receiving portion 117 inside thereof, and the lens 300 are specifically configured. The shape is different. In addition, the same code|symbol is attached|subjected to the site|part of the same kind as 1st Embodiment, and the overlapping description is abbreviate|omitted.

<Configuration of lighting device 100>
In this embodiment, as shown in FIG. 9, the capacity inside the case 111 is formed large. That is, both side walls 113 , 113 rising from both edges of the bottom wall 112 of the case 111 have their upper ends extending to a position considerably higher than the mounting portion 114 provided on the bottom wall 112 inside the case 111 . Like the case 11, the case 111 can also be easily extruded from a metal such as aluminum.

The upper halves of both side walls 113, 113 of the case 111 are thickened toward the inner side facing each other, and tapers 113a are provided at the upper ends of the respective side walls 113 to make it easier to receive the lens 300 from the upper opening of the case 111. . Engagement portions 18 for fixing lenses 300, which will be described later, are provided at the lower ends of portions of the inner surfaces of both side walls 113, 113 where the thickness is increased. Here, the engaging portion 18 is the same as that of the first embodiment, and is provided as a ridge with a semicircular cross section that protrudes from the inner surface of the side wall 113 and extends in the longitudinal direction.

The mounting portion 114 has substantially the same shape as the mounting portion 14, but a flange 16 is formed only on one side end of the mounting surface 115 thereof. Therefore, when the substrate 21 of the light source 20 is placed on the mounting portion 114, the substrate 21 is placed against one flange 16 and is positioned only in one of the two side directions. The light source 20 of this embodiment is the same as that of the first embodiment.

In this embodiment as well, the space inside the case 111 defined by the mounting portion 114 serves as the melting receiving portion 117, but the space above the mounting portion 114 can also serve as the melting receiving portion. In other words, inside the case 111, a position higher than the mounting portion 114 is also surrounded by the side walls 113, 113, and a space below the upper ends of the both side walls 113, 113 and higher than the mounting portion is also extended by the melt receiving portion 117. Space is available to accommodate a larger volume of lens 300 melt.

Like the lens 30, the lens 300, which is an optical component, is made of a transparent resin material, but unlike the lens 30, it does not positively perform special light distribution control. As shown in FIG. 9, more specifically, the lens 300 is formed in a substantially rectangular cross-sectional shape, and includes a flat bottom surface 331 facing the light source 20, both side surfaces 332, 332, and an exit surface 333 as the upper end. , with Note that the bottom surface 331 of the lens 300 is provided with a flat recess in which the light source 20 is accommodated.

Engaged portions 35 for fixing to the inner surfaces of the side walls 113, 113 of the case 11 are provided approximately in the center of the side walls 332, 332 of the lens 300, respectively. Here, the engaged portion 35 is the same as that of the first embodiment, and is provided as a recessed groove with a semicircular cross section extending in the longitudinal direction recessed inward from the side surface 332 and into which the engaging portion 18 is fitted. It is It should be noted that this embodiment may also be constructed in such a way that the engaged portion 35 is provided on the case 111 and the engaging portion 18 is provided on the lens 300 as an opposite aspect.

Further, in this embodiment, in addition to the end cap 40 that is attached to the end of the case 111 and also serves as a bracket that supports the ceiling 1, a support bracket 60 that is movably attached to the middle of the case 111 and supports the ceiling 1 is also provided. ing. As shown in FIG. 9, the support bracket 60 includes a fixed portion 61 fixed to the ceiling 1 where the support bracket 60 is installed, a vertical portion 62 extending downward from the fixed portion 61, and connected from the lower end of the vertical portion 62 at a substantially right angle. a portion 63;

A connecting portion 63 at the lower end of the support bracket 60 overlaps the bottom wall 112 of the case 111 from below, and the connecting portion 63 is fixed by a screw 43 to a nut 44 housed in a long groove 114a. Here, the long groove 114a serves as a rail into which the tip of the screw 43 for fixing the support bracket 60 and the nut 44 are fitted so as to be relatively movable. Therefore, the support bracket 60 is configured to be movable along the longitudinal direction of the case 111 and to be fixed at an arbitrary position.

<Action of lighting device 100>
When assembling the illumination device 100 as described above, the light source 20 is placed on the mounting portion 114 inside the case 111 and the lens 300 is fitted through the upper opening of the case 111 as shown in FIG. At this time, since both side walls 113, 113 of the case 111 have tapers 113a, the bottom surface 331 of the lens 300 can be easily fitted deep into the case 111 by being guided by the tapers 113a. Now, as shown in FIG. 10, a total of four lenses 300 (and light sources 20) are combined in one row within one case 111, but the number of combinations here is a matter of design that can be determined as appropriate.

When the lighting device 100 is mounted on the ceiling 1, the end caps 40 attached to both ends of the case 111 are fixed to the ceiling 1 by screws or the like, as shown in FIGS. A support bracket 60 mounted in the middle is fixed to the ceiling 1 by screws or the like. Here, the tip of the screw 43 and the nut 44 for fixing the support bracket 60 are fitted in the long groove 114a in the bottom wall 112 of the case 111 so as to be relatively movable. Thus, since the long groove 114a of the case 111 has a curtain rail structure, the support bracket 60 can be fixed at an arbitrary position.

Further, in the illumination device 100, the capacity inside the case 111 is formed to be large, and the space inside the case 111 that is partitioned by the attachment portion 114 not only serves as the melting receiving portion 117, but also serves as the attachment portion 114. The upper space can also be a melt receiver. That is, the space inside the case 111 below the upper ends of the side walls 113 and 113 and higher than the mounting portion 114 also serves as a space where the melt receiving portion 117 is extended, so that a larger amount of the melt of the lens 300 can be accommodated. possible to accept.

[Structure and operational effects of the present invention]
Although various embodiments have been described above, the present invention is not limited to the various embodiments described above. The present invention derived from the various embodiments described above will be described below.

First, the present invention comprises cases 11 and 111, a light source 20 that emits light from the inside of the cases 11 and 111 to the outside, and optical components 30 and 300 that are fixed on the light emission side of the light source 20 and pass light. In the lighting device 10, 100 having
Mounting portions 14 and 114 for mounting the light source 20 are provided inside the cases 11 and 111,
Spaces inside the cases 11 and 111 defined by the mounting portions 14 and 114 are melt receiving portions 17 and 117 that can receive the optical components 30 and 300 when they are melted and dripped. .

In a conventional lighting device, light distribution is controlled by a reflector integrated with the case, so the reflector increases the outer dimensions of the case and increases its weight. On the other hand, in the illumination devices 10 and 100, by first omitting the reflector from the essential constituent elements, it is possible to reduce the outer dimensions of the entire device and reduce the weight. Moreover, in the illumination devices 10 and 100, the cases 11 and 111 do not need to be designed based on the shape of the reflector, and the design of the entire device and the degree of freedom in design are increased. Also, it is possible to reduce the material cost of the cases 11 and 111 .

Moreover, in the illumination devices 10 and 100, not only the reflector plate is omitted, but also synthetic resin can be used as the material of the optical components 30 and 300 instead of glass by taking measures against melting and dripping, which will be described later. Weight reduction is possible. In addition, in the illumination devices 10 and 100, the risk of cracking in the glass material is avoided, so safety can be further enhanced.

Assuming that the illumination devices 10 and 100 are installed in passenger compartments of railway vehicles, the optical components 30 and 300 are made of synthetic resin, so measures against melt dripping are taken. That is, the spaces inside the cases 11 and 111 defined by the mounting portions 14 and 114 of the light source 20 are used as the melt receiving portions 17 and 117 that can receive the optical components 30 and 300 melted and dripped.

As a result, even if the optical components 30 and 300 are made of synthetic resin and should melt, the molten material will drop into the melt receivers 17 and 117 defined by the mounting portions 14 and 114 . Therefore, the melted material can be guided to the melt receivers 17 and 117 and retained without leaking to the outside of the cases 11 and 111 . Here, the specific arrangement and capacity of the fusion receivers 17 and 117 are not limited to the reflector plate as in the case of the conventional lighting device, and are appropriately determined according to the size of the optical components 30 and 300, for example. and good.

Further, the present invention is characterized in that the melt receivers 17 and 117 are positioned below the light source 20 mounted on the mounting portions 14 and 114 .

As a result, the molten material of the optical components 30 and 300 stays below the light source 20 without accumulating in the vicinity of the light source 20 on the mounting portions 14 and 114 . Therefore, it is also possible to prevent the melt from being further heated by, for example, the heat emitted by the light source 20 .

Further, in the present invention, the optical components 30 and 300 are engaged with the engaging portion 18 provided on one side between the inner surfaces of the cases 11 and 111 and the engaged portion 35 provided on the other side. By combining, the light source 20 is fixed to the cases 11 and 111 with the light source 20 sandwiched between the mounting portions 14 and 114 .

Thus, by using the engagement relationship between the engaging portion 18 and the engaged portion 35 to fix the optical components 30 and 300 to the cases 11 and 111, screwing and bonding operations as in the prior art are unnecessary. As a result, the number of parts and assembly man-hours are reduced. Moreover, when the optical components 30 and 300 are fixed to the cases 11 and 111, the light source 20 can also be fixed at the same time. Therefore, the lighting devices 10 and 100 can be assembled easily, and the cost can be greatly reduced.

In addition, in the present invention, the mounting portions 14 and 114 are provided with first positioning means 16 for positioning the light source 20 placed on the mounting portions 14 and 114 in at least one direction,
The optical components 30 and 300 are characterized by having second positioning means 36 for positioning the light source 20 in at least the other direction different from the one direction when superimposed on the light source 20 .

This allows the light source 20 placed on the mounting portions 14 and 114 of the cases 11 and 111 to be positioned in one direction, for example, in both directions during assembly work for fixing the light source 20 and the optical components 30 and 300 to the cases 11 and 111. You can prevent slippage. In addition, it is possible to prevent the light source 20 having the optical components 30 and 300 superimposed thereon from being displaced in other directions such as the front-rear direction.

Further, the present invention is characterized in that a space inside the cases 11 and 111 where the mounting portions 14 and 114 are not provided serves as a power source housing portion capable of housing a power source device 50 that supplies power to the light source 20. and

Thereby, the lighting device 10, 100 can be integrated with the power supply device 50 to form a unit. Therefore, it is possible to save the trouble of attaching the power supply device 50 to the installation location (ceiling 1) separately from the lighting devices 10 and 100. FIG.

In addition, the present invention includes terminal members 40 attached to the ends of the cases 11 and 111,
The terminal member 40 is characterized in that it also serves as a bracket that supports the installation location.

Normally, the ends of the cases 11 and 111 are covered by mounting terminal members 40, but by also using the terminal members 40 as brackets for supporting the lighting devices 10 and 100 at the installation location (ceiling 1), The lighting devices 10 and 100 can be easily installed without increasing the number of parts. Here, no special processing for attachment to the installation location (ceiling 1) of the lighting devices 10 and 100 is required.

Further, in the present invention, the cases 11 and 111 have bottom walls 12 and 112 which are formed in a uniform groove-like cross section in the longitudinal direction, and which rise from both end edges of the bottom walls 12 and 112 and face each other. and both side walls 13, 113 that
The bottom walls 12, 112 of the cases 11, 111 are formed with long grooves 14a, 114a that are recessed inward from the outside along the longitudinal direction thereof. The strips serve as the mounting portions 14 and 114, and the upper ends of the mounting portions 14 and 114 are provided with flat mounting surfaces 15 and 115 for mounting the substrate 21 of the light source 20 along the longitudinal direction thereof,
In the space surrounded by the bottom walls 12, 112 and the side walls 13, 113 inside the cases 11, 111, the regions defined on both sides of the mounting portions 14, 114 are the melt receiving portions 17, 114. 117.

By making the cases 11 and 111 forming the outer shell of the illumination devices 10 and 100 simple configurations with such groove-shaped cross sections, it is possible to utilize them as general-purpose designs. In addition, it is possible to reduce the size of the lighting devices 10 and 100, which not only facilitates the installation work on the installation location (ceiling 1), but also reduces the space around the lighting devices 10 and 100 at the installation location (ceiling 1). You can also get an optical illusion effect that makes it look wider. Furthermore, it is also possible to aim at integration of the lighting devices 10 and 100 and the installation location (the ceiling 1), thereby improving the open lighting space and the design.

In the space surrounded by the bottom walls 12, 112 and the side walls 13, 113 inside the cases 11, 111, the regions partitioned on both sides of the mounting portions 14, 114 of the light source 20 are respectively defined as molten material receiving portions 17. , 117. As a result, the two independent wide areas inside the cases 11 and 111 serve as the melt receivers 17 and 117, and when the optical components 30 and 300 should melt, the melt is reliably received without leaking. can be retained.

Furthermore, in the present invention, the case 111 is supported by the installation location (ceiling 1) via the support bracket 60,
A portion of the support bracket 60 overlaps the bottom wall 112 of the case 111 from below, and a portion of the support bracket 60 is screwed 43 to a nut 44 housed in the long groove 114a. It is characterized by being movable.

In such a support bracket 60, the long groove 114a in the bottom wall 112 of the case 111 has a curtain rail structure. Therefore, the support bracket 60 can move along the longitudinal direction of the case 111 and can be fixed at an arbitrary position.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to the above-described embodiments, and the present invention may be modified or added without departing from the gist of the present invention. Included in the invention. For example, although an example in which the lighting devices 10 and 100 are installed on the ceiling 1 in the cabin of a railroad vehicle has been described, the lighting devices 10 and 100 can be used for indirect lighting in cabins in other vehicles such as aircraft and automobiles, or lighting for indoor facilities and general households. may apply.

Moreover, the specific shape of the casings 11 and 111 is not limited to the illustrated example. Further, the shapes of the molten material receivers 17 and 117, which form the basis of the present invention, are not limited to those shown in the drawings. Also, the optical components 30 and 300 may be a protective cover that does not intend to control the light distribution in place of the lens that performs predetermined light distribution control, but synthetic resin is suitable as the material for the optical components 30 and 300, as is the case with the lenses.

Further, the case 11, 111 is provided with the engaging portion 18, and the lens 30, 300 is provided with the engaged portion 35. Alternatively, the case 11, 111 is provided with the engaged portion 35, and the lens 30, 300 is provided with the engaged portion 35. 300 may be provided with the engaging portion 18 . Here, the engaging portion 18 is not limited to a ridge, and the engaged portion 35 is not limited to a groove into which the ridge is fitted.

INDUSTRIAL APPLICABILITY The lighting device according to the present invention can be widely used for general-purpose lighting at various installation locations, not limited to indirect lighting in the cabins of railway vehicles, aircraft, automobiles, and the like.

DESCRIPTION OF SYMBOLS 1... Ceiling 10... Lighting device 11... Case 12... Bottom wall 13... Side wall 14... Mounting part 15... Mounting surface 16... Flange (first positioning means)
DESCRIPTION OF SYMBOLS 17... Melting receiving part 18... Engaging part 20... Light source 21... Substrate 22... LED chip 30... Lens (optical component)
31... Bottom surface 32... Entrance surface 33... Output surface 35... Engaged portion 36... Notch (second positioning means)
40... End cap (terminal member)
50... Power supply device 60... Support bracket 100... Lighting device 111... Case 112... Bottom wall 113... Side wall 114... Mounting part 115... Mounting surface 117... Melting receiving part 300... Lens (optical component)
331... Bottom surface 332... Side surface 333... Output surface

Claims (8)

A lighting device having a case, a light source that emits light from the inside of the case to the outside, and an optical component that is fixed to the light emission side of the light source and allows light to pass through,
A mounting portion for mounting the light source is provided inside the case,
A lighting device, wherein a space inside the case defined by the mounting portion serves as a melt receiving portion that can receive the melted drop of the optical component. 2. The lighting device according to claim 1, wherein the fusion receiving portion is positioned below the light source mounted on the mounting portion. An engaging portion provided on one side of the optical component and the inner surface side of the case engages with an engaged portion provided on the other side, whereby the light source is positioned between the mounting portion and the optical component. 3. The lighting device according to claim 1, wherein the lighting device is fixed to the case while being sandwiched between the two. the mounting portion includes first positioning means for positioning the light source placed on the mounting portion in at least one direction;
4. The lighting system according to claim 1, wherein said optical component comprises second positioning means for positioning said light source in at least another direction different from said one direction when superimposed on said light source. Device. 5. The apparatus according to claim 1, wherein a space inside the case where the mounting portion is not provided serves as a power supply housing portion capable of housing a power supply device for supplying power to the light source. lighting device. A terminal member attached to the end of the case,
6. The lighting device according to claim 1, wherein the terminal member also serves as a bracket that supports the installation location. The case comprises a bottom wall formed in a groove-shaped cross section that is uniform in the longitudinal direction and extending in the longitudinal direction, and both side walls rising from both ends of the bottom wall and facing each other,
The bottom wall of the case is formed with a long groove that is recessed inward from the outside along the longitudinal direction of the case. Equipped with a flat mounting surface for mounting the substrate of the light source along the longitudinal direction,
3. A space surrounded by said bottom wall and said side walls inside said case, wherein areas defined on both sides of said mounting portion serve as said melt receiving portion. , 4, 5 or 6. The case is supported at the installation location via a support bracket,
A part of the support bracket overlaps the bottom wall of the case from below, and the part is screwed to a nut housed in the long groove, and is movable along the long groove. 8. The lighting device according to claim 7.

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