JP4325049B2 - Light guide type lighting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light guide type illuminating device, particularly a rainproof type, which uses a light-transmitting pipe to guide light from a light source to a long distance and gradually emit light along the path.
[0002]
[Prior art]
In the light guide type illuminating device using a light-transmitting pipe as a light guide, in the rainproof type, as shown in FIG. 7, among the light source unit 2 and the pipe 1 connected to each other, the light source unit 2 The glass 1 is fitted with a glass 25 in the opening for light projection so that a sealing structure is formed by itself, and the pipe 1 has a light-transmitting cap 11 fixed at both ends with an adhesive to form a sealing structure. , Or connected to the light source part 2 via the connecting member 4 or, as shown in FIG. 8, a state where the open end provided with the flange 15 of the pipe 1 is inserted into the light source part 2 having a sealed structure to keep the waterproof. It was connected with.
[0003]
[Problems to be solved by the invention]
By the way, if the pipe is sealed, stress acts between the pipe and the cap bonded to the end of the pipe due to the expansion / contraction action of the material due to temperature change, and the adhesive is cracked or peeled off. In addition, the work of bonding the cap to the end of the pipe is troublesome and expensive, and the appearance of the bonding surface is also bad.
[0004]
Further, when a flange bonded and fixed to the end of the pipe is connected to the light source with a screw or the like, there is a problem that the angle of the light emitting surface (irradiation direction in the circumferential direction) of the pipe cannot be changed later.
[0005]
The present invention has been made in view of the above points, and an object of the present invention is to provide a light guide lighting device that can obtain a waterproof structure easily and without problems, and to maintain the waterproof structure. It is another object of the present invention to provide a light guide type illumination device that can change the irradiation direction.
[0006]
[Means for Solving the Problems]
Therefore, the present invention relates to a light guide type illuminating device that uses a light-transmitting pipe to guide light from a light source far away and gradually emit light in the middle of the path. The light-emitting opening is airtightly joined to the light-projecting opening so that the interior space of the light source section and the pipe interior space communicate with each other, and the light source section connects the interior space and the outside. It is characterized in that it is provided with a vent hole for communication.
[0007]
The pipe is preferably provided with a reflector that emits light in a limited direction in the circumferential direction, and the pipe is held rotatably about its axis.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the following, the present invention will be described in detail based on an example of the embodiment. As shown in FIG. 1, this illumination device irradiates light from a light source 20 and a light projecting opening on one end side, covering the periphery of the light source 20. A light source section 2 in which a reflecting mirror 21 is housed in a housing, a cylindrical pipe 1 that guides light from one end to the other end side and exits from a required peripheral surface, and a flat reflector 31 on a lid 30 It is composed of an end reflector 3 formed as an attachment, and one end of a pipe 1 is connected to the light source section 2, and one end of another pipe 1 is connected to the other end of the pipe 1 via a connecting member 4. The end reflector 3 is attached or connected.
[0009]
Here, both ends of the pipe 1 are opened, and a packing 6 is interposed between the outer peripheral surface of the insertion connection portion to the light source unit 2 and the inner surface of the fitting port on the light source unit 2 side. The packing 6 is interposed between the cylindrical connecting member 4 used for connecting the pipes 1 and the outer periphery of the pipe 1 or between the end reflector 3 and the outer periphery of the pipe 1 respectively. Let them be connected in an airtight manner.
[0010]
And in the light source part 2, the clearance gap 26 for ventilation | gas_flowing is ensured between the light source 20 side and the pipe 1 side by hold | maintaining in the state which floated the glass 25 distribute | arranged to the opening surface of the light projection side. Furthermore, the housing of the light source unit 2 is provided with a vent hole 27 for ventilating with the outside air. Since the internal space from the light source unit 2 to the end reflector 3 is all connected, the vent hole 27 may be provided in the connecting member 4 or the end reflector 3.
[0011]
Except for the air vent 27, a waterproof structure can be secured by the packing 6, and the air vent 27 can be prevented from entering rainwater by appropriately setting the opening direction and position thereof. Can do. In addition, although it is the vent hole 27 for preventing the fluctuation | variation of internal atmospheric pressure, in order to prevent that a dust and dust penetrate | invade into an inside, what is equipped with the filter 28 is used for this.
[0012]
In addition, the packing 6 and the connecting member 4 are made such that the pipe 1 can be rotated around its axis. As shown in FIG. 2, when the pipe 1 is used in which the reflecting plate 14 is arranged on the inner surface so that light can be emitted outside only within the angle indicated by α in the drawing, the irradiation direction is changed by the above rotation. Can be changed.
[0013]
Moreover, as the connection member 4, as shown in FIG. 3, it is preferable to provide the fixing | fixed part 40 for fixing to a ceiling surface or a wall surface. Similarly, the end reflector 3 and the light source unit 2 may be integrally provided with a fixing unit for fixing to a ceiling surface or a wall surface.
[0014]
4 and 5 show a specific example of the configuration shown in FIG. 1, and the vent 27 is formed as having a labyrinth-like passage on the side surface of the light source unit 2 to prevent rainwater from entering. .
[0015]
Further, as shown in FIG. 6, the light source unit 2 releases the connection buckle 26 with the flange 15 on the pipe 1 side, and slides the main body backward with respect to the mounting fixing member 23 in the axial direction of the pipe 1. Thus, if the fitting with the pipe 1 is removed , the light source 20 can be exchanged by allowing the light source 20 to be rotated downward about the shaft 27. In the figure, 28 is a fixing pin for fixing the main body to the mounting fixing member 23.
[0016]
【The invention's effect】
As described above, in the present invention, an open end portion of a pipe is used in a light guide type illuminating device that uses a light-transmitting pipe to guide light from a light source to a distance and gradually emit light in the middle of the path. and with the internal space and the pipe inner space of and the light source unit and the opened light projecting opening of the light source portion in hermetically joined to a waterproof structure is assumed to communicating, the light source unit and the interior space Since the vent hole for communicating with the outside is provided, a waterproof structure can be obtained even if the individual pipes are not sealed.
[0017]
In addition, the presence of the air vent eliminates the atmospheric pressure fluctuation in the internal space and does not cause stress due to the air pressure fluctuation, and the air vent is provided in the light source section having the internal space communicating with the internal space of the pipe. Therefore, it is possible to ensure the waterproofness more reliably than that provided with a vent at each end of the pipe. Even when it can be rotated about its axis, the waterproof property is not impaired.
[0018]
A pipe provided with a reflector that emits light in a limited direction in the circumferential direction can be suitably used.At this time, if the pipe is held rotatably about its axis, the light irradiation direction can be changed. It can be changed after construction.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing an example of an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the pipe of the above.
FIG. 3 is a schematic cross-sectional view of another example of the above.
FIG. 4 is a cutaway front view of a specific example.
FIG. 5 is a cross-sectional view of the vent hole portion of the above.
6A and 6B show the same light source unit, where FIG. 6A is a left side view and FIG. 6B is a front view.
FIG. 7 is a schematic exploded sectional view of a conventional example.
FIG. 8 is a schematic exploded sectional view of another conventional example.
[Explanation of symbols]
1 Pipe 2 Light source 6 Packing

Claims (2)

In a light guide type illuminating device that uses a light-transmitting pipe to guide light from a light source to a distance and gradually emit light in the middle of the path, the light is emitted from the open end of the pipe and the light source. The water source is airtightly connected to the opening for water and the interior space of the light source section and the pipe interior space communicate with each other, and the light source section includes a vent for communicating the interior space with the outside. A light guide type illuminating device.   2. The light guide type according to claim 1, wherein the pipe is provided with a reflector that emits light in a limited direction in the circumferential direction, and the pipe is rotatably held around its axis. Lighting device.

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