JP2000326786A - Lighting system for vehicle and structure of light emitting part in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize the ultraviolet ray of a discharge lamp of a light emitting device, protect a phosphor of the luminescent part from interference, friction and the like, simplify a structure of the illuminant and reduce the cost. SOLUTION: An ultraviolet ray UV from a discharge lamp of a light emitting device can be utilized. As the clearance C between an inner surface of an ultraviolet ray cutting tube 50 and a phosphor 52 on the outer surface side of an optical rod 51 is held by a protrusion part 54 of a clearance holding part, the phosphor 52 of the luminescent part 5 can be protected from the interference, friction and the like. As the optical rod becomes unnecessary, the number of components can be reduced, and further a means for holding the clearance between the optical rod and the ultraviolet ray cutting tube 50 for protecting the phosphor 52 from the interference, friction and the like becomes unnecessary. Whereby a structure of the illuminant 5 can be simplified and the cost can be reduced. Further the use of the ultraviolet ray cutting tube 50 made of fluoroglass and a resin dispenses with the phosphor 52, which simplifies the structure and reduces the cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transmitting ultraviolet light from a discharge lamp of a light source device mounted on a vehicle to a predetermined position of a vehicle through an ultraviolet light transmission path, and transmitting the ultraviolet light to a visible light by a phosphor of a light emitting portion. The lighting device for a vehicle that converts the light into a predetermined position of the vehicle and radiates the light to the outside, and the structure of the light emitting unit in the lighting device for a vehicle that can protect the phosphor of the light emitting unit from interference or friction, and the structure of the light emitting unit The present invention relates to a structure of a light-emitting unit in a vehicle lighting device that can be simplified and reduced in cost.

[0002]

2. Description of the Related Art In general, a vehicle lighting device of this type is wired between a light source device mounted on a vehicle and a predetermined position of the vehicle, and transmits light from the light source device to the vehicle. A light transmission path for transmitting light to a predetermined position; and a vehicle illumination lamp disposed at a predetermined position of the vehicle and irradiating the light transmitted through the light transmission path to the outside. When the light source device is turned on, light from the light source device is transmitted to the vehicle lighting lamp via the light transmission path, and is radiated to the outside from the vehicle lighting lamp. As this type of vehicle lighting device, for example, there is one described in Japanese Patent Publication No. 7-97443.

[0003]

SUMMARY OF THE INVENTION The present invention relates to an improvement of the above-described vehicle lighting device, and an object of the present invention is to provide a vehicle lighting device capable of utilizing ultraviolet rays of a discharge lamp, and a phosphor of a light emitting portion. To provide a structure of a light emitting unit in a vehicle lighting device capable of protecting the light emitting device from interference, friction, and the like, and a structure of the light emitting unit in a vehicle lighting device capable of simplifying the structure of the light emitting unit and reducing the cost. It is.

[0004]

According to the present invention, there is provided a light source device using a discharge lamp mounted on a vehicle as a light source, and wiring between the light source device and a predetermined position of the vehicle. An ultraviolet light transmission path for transmitting ultraviolet light from the light source device to a predetermined position of the vehicle, and the ultraviolet light transmitted at the predetermined position of the vehicle and transmitted through the ultraviolet light transmission path to visible light by a phosphor of a light emitting unit. And a fluorescent lamp for vehicle illumination for converting and irradiating the light to the outside. As a result, the vehicle lighting device of the present invention can utilize the ultraviolet light of the discharge lamp.

Further, the present invention (the invention according to claims 2 to 6)
In order to achieve the above object, an ultraviolet cut tube, an optical rod housed in the ultraviolet cut tube, and a phosphor provided on the inner surface of the ultraviolet cut tube or on the outer surface of the optical rod,
A holder that integrally holds the ultraviolet ray transmission path, the ultraviolet ray cut tube, and the optical rod, a clearance holding part that keeps a clearance between the inner surface of the ultraviolet ray cut tube or the outer surface of the optical rod and the phosphor,
, And a light-emitting unit is constituted. As a result, the structure of the light emitting unit in the vehicle lighting device of the present invention is as follows:
Since the clearance between the inner surface of the ultraviolet cut tube or the outer surface of the optical rod and the phosphor is maintained by the clearance holding portion, the phosphor of the light emitting portion can be protected from interference, friction, and the like.

Further, the present invention (the invention according to claim 7)
In order to achieve the above-mentioned object, a light-emitting portion is constituted by an ultraviolet ray cut tube, a phosphor provided on the inner surface of the ultraviolet ray cut tube, and a holder for integrally holding the ultraviolet ray transmission path and the ultraviolet ray cut tube. It is characterized by having been done. Furthermore, in order to achieve the above object, the present invention (an invention according to claim 8) provides a holder for integrally holding an ultraviolet ray cut tube made of fluorescent glass or resin, an ultraviolet ray transmission path and an ultraviolet ray cut tube. And a light emitting section is constituted by the above.
As a result, the structure of the light emitting portion in the vehicle lighting device of the present invention does not require an optical rod, so that the number of parts is reduced, and further, the phosphor is maintained while maintaining the clearance between the optical rod and the ultraviolet cut tube. A means for protecting from interference, friction and the like becomes unnecessary. As a result, the structure is simplified and the cost is reduced. Furthermore, the use of an ultraviolet cut tube made of fluorescent glass or resin eliminates the need for a phosphor,
The structure is simplified and the cost is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, one embodiment of a vehicle lighting device according to the present invention and four examples of a structure of a light emitting portion in the vehicle lighting device according to the present invention will be described with reference to the accompanying drawings. explain. 1 and 2 show an embodiment of a vehicle lighting device according to the present invention. This example describes an example used for a rear combination lamp mounted on the left and right of the rear part of an automobile.

In FIG. 1, reference numeral 1 denotes one light source device mounted on a vehicle (not shown, but in this example, an automobile). This light source device 1 has a hollow casing 10.
The right reflection surface 11R and the left reflection surface 11L provided on the inner surface of the casing 10, respectively, one light source 12 disposed in the casing 10, the right reflection surface 11R, and the left reflection surface 11L. It is composed of a right light projecting port 13R and a left light projecting port 13L (for example, a circular shape) provided respectively.

The right reflecting surface 11R and the left reflecting surface 11L are concave reflecting surfaces and are formed of reflecting surfaces for reflecting light L1 from a light source 12 of a discharge lamp, which will be described later, that is, ultraviolet rays UV. ing. In addition, the right reflection surface 11R and the left reflection surface 11L are such that the first focal point F1 is located at (or near) a common point substantially at the center of the casing 10, and the right second focal point F2R, the left second focal point F2L is the right light emitting port 13R,
It is composed of a part of a spheroidal surface located in the vicinity of the left light emitting port 13L. This reflection surface 11R, 1
The 1L spheroid has the optical axis ZZ as the axis of rotation. The reflecting surfaces 11R and 11L are configured by the above-described spheroidal surfaces, and in addition to the second focal points F2R and F2L.
Is constituted by a plurality of spheroidal surfaces located at a plurality of positions on the optical axis Z-Z, and is constituted by a plurality of free-form surfaces on which a plurality of first focal points F1 and second focal points F2R and F2L are respectively located. There are things that are.

The one light source 12 is composed of a discharge lamp mainly containing mercury,
R, it is arranged in a direction orthogonal to the long axis direction (optical axis ZZ direction) of the left reflection surface 11L and in the horizontal direction (so-called horizontal placement). The light emitting portion of the discharge lamp 12 is disposed at the common first focal point F1 (or near the common first focal point F1) of the right reflecting surface 11R and the left reflecting surface 11L.

When the light source device 1 is turned on, the light source device 1 described above emits light L1 (ie, ultraviolet light UV) from the light source 12.
In this example, the ultraviolet light UV having a main wavelength of 2537 angstroms is reflected by the right reflection surface 11R and the left reflection surface 11L, and the reflected light L1L, L1R (hereinafter, referred to as ultraviolet light UV) is projected on the left side. The opening 13L and the right floodlight 13R are concentrated on the left floodlight 13L.
The light is emitted to the outside from the right light emission opening 13R.

In FIG. 1, reference numeral 2 denotes a dimming lens (ultraviolet UV collimator lens) disposed opposite to the light emitting ports 13R and 13L of the light source device 1. This dimming lens 2
Is made of, for example, quartz glass or the like, and
The ultraviolet light UV projected from 3L is converted into parallel light parallel to the optical axis ZZ.

In the drawing, reference numeral 3 denotes a light control lens 2 and respective lamps 43, 4 of a rear combination lamp RC to be described later.
An ultraviolet guide as an ultraviolet transmission path wired between the light guides 4 and 45. The ultraviolet guide 3 is made of, for example, quartz glass and has one ultraviolet incident end 30 and seven ultraviolet exit ends 31 to 37, respectively. That is,
The ultraviolet light incident end 30 is disposed so as to face the light control lens 2 and orthogonal to the optical axis Z-Z, while the ultraviolet light emitting ends 31 to 37 are provided with a rear combination lamp described later. RC lamps 43, 44,
45 are provided at predetermined positions. The ultraviolet guide 3 receives the ultraviolet rays UV from the dimming lens 2 at an ultraviolet incidence end 30 and transmits the incident ultraviolet UV to the ultraviolet emission ends 31 to 37 to transmit the ultraviolet rays UV to the ultraviolet emission ends 31 to 37.
The light is emitted from 37 to the respective lamps 43, 44, 45 of the rear combination lamp RC described later.

In FIG. 1, RC is a fluorescent lamp for vehicle illumination arranged at a predetermined position of the vehicle. In this example, a rear combination lamp is provided on the left and right sides of the rear of the vehicle. The rear combination lamp RC includes a tail stop lamp 43, a turn signal lamp 44, and a backup 45. At predetermined positions of the respective lamps 43, 44, 45 of the rear combination lamp RC, light emitting ends 31 to 37 of the light guide 3 are arranged, respectively. The above-described tail stop lamp 43 includes three light-emitting portions 431, 432, and 4 having a phosphor capable of obtaining red light.
33 is built in. Further, the above-mentioned turn signal lamp 44 has three light-emitting portions 444, 445 and 446 each having a phosphor capable of obtaining amber light. Further, the above-described backup lamp 45 has a built-in one light emitting unit 457 having a phosphor that can obtain white light. The ultraviolet emitting ends 31 to 37 of the ultraviolet guide 3 are arranged on the light emitting portions 431 to 457, respectively.

A light control lens 2, an ultraviolet guide 3, and a rear combination lamp RC shown in FIG. 16 are arranged and wired in the left light projecting port 13L of the light source device 1.

Next, the operation of the vehicle lighting device having the above configuration will be described. First, when the discharge lamp 12, which is the light source of the light source device 1, is turned on, ultraviolet rays UV are emitted from the light projecting openings 13R, 13L of the light source device 1 toward the light control lens 2,
The ultraviolet light UV is applied to the ultraviolet light incident end 30 of the ultraviolet light guide 3.
Incident on.

The ultraviolet light UV that has entered the ultraviolet light incident end 30 of the ultraviolet light guide 3 is transmitted through the ultraviolet light guide 3 to reach the ultraviolet light emitting ends 31 to 37 of the ultraviolet light guide 3, and from this ultraviolet light emitting ends 31 to 37, the light emitting section 431. To 457, and converted into visible light of each functional color by the phosphors of the light-emitting portions 431 to 457. The converted visible light of each functional color is radiated from the lamps 43, 44, 45 to the outside in a predetermined light distribution pattern. For example, red light is emitted from the tail stop lamp 43, amber light is emitted from the turn signal lamp 44, and white light is emitted from the backup lamp 45 to the outside.

As described above, the vehicle lighting device of the present invention in this embodiment can utilize the ultraviolet rays UV of the discharge lamp 12 of the light source device 1.

FIGS. 3 to 8 show a first embodiment of the structure of the light emitting section in the vehicle lighting device of the present invention. In the figure, FIG.
The same reference numerals as in FIG. 2 and FIG.

In the figure, reference numeral 5 denotes a light emitting section. The light-emitting part 5 is a light-emitting part 4 of each of the lamps 43, 44, 45 of the rear combination lamp RC shown in FIGS.
Used as 31-457. The light emitting section 5 includes an ultraviolet cut tube 50 and the ultraviolet cut tube 5.
The optical rod 51 housed in the optical rod 51, a phosphor 52 provided on the outer surface of the optical rod 51 (shown by a broken line in FIG. 3), and an ultraviolet guide as an ultraviolet transmission path thereof 3 and a holder 53 for integrally holding the ultraviolet cut tube 50 and the optical rod 51, and a clearance holder 54 for maintaining a clearance C between the inner surface of the ultraviolet cut tube 50 and the phosphor 52. is there.

The ultraviolet cut tube 50 is made of, for example, soft soda glass, and has a hollow cylindrical shape with one end opened and the other end closed. The optical rod 51 irradiates the ultraviolet rays UV emitted from the ultraviolet light emitting ends 31 to 37 of the ultraviolet light guide 3 from the outer surface to the outside and reflects the light to the inside, and has a cylindrical shape. The outer diameter of the optical rod 51 is larger than the outer diameter of the ultraviolet light emitting ends 31 to 37 of the cylindrical ultraviolet light guide 3 and the ultraviolet light cut tube 50.
Is slightly smaller than the inner diameter of The length of the optical rod 51 is substantially equal to the depth of the ultraviolet cut tube 50 (the length between the open end and the inner surface of the closed end).
The phosphors 52 are provided in layers on the outer surface of the optical rod 51 except for the clearance holding portions 54 at both ends. The holder 53 has a cap shape to fit the open end of the ultraviolet cut tube 50 from outside. At the center of the holder 53, a circular insertion hole 530 is provided. The clearance holding portions 54 are circular flange-shaped projections provided at both ends of the optical rod 51, and project from the inner surface of the ultraviolet cut tube 50 so that the inner surfaces of both ends of the ultraviolet cut tube 50 are provided. And a convex portion that comes into contact with.

As shown by an arrow in FIG. 3, the optical rod 51 is housed in the ultraviolet cut tube 50, the holder 53 is fitted to the open end of the ultraviolet cut tube 50, and the holder 53 is inserted. Hole 530
The emission ends 31 to 37 of the ultraviolet guide 3 are inserted therein,
The emission ends 31 to 37 of the ultraviolet guide 3 are brought into close contact with one end of the optical rod 51. Note that the process of fitting the holder 53 to the ultraviolet cut tube 50 and the process of inserting the ultraviolet guide 3 into the holder 53 insertion hole 530 may be performed in reverse to the above, or may be performed simultaneously. As a result, as shown in FIG. 4, the emission ends 31 to 37 of the ultraviolet guide 3, the open end of the ultraviolet cut tube 50, and one end of the optical rod 51 are integrally held by the holder 53. Also, as shown in FIGS. 4 and 5, convex portions (clearance holding portions) 54 at both ends of the optical rod 51 are
Thus, the clearance C between the layer of the phosphor 52 on the outer surface side of the optical rod 51 and the inner surface of the ultraviolet cut tube 50 is maintained.

The structure of the light emitting section of the present invention in this embodiment has the above-described structure, and the operation thereof will be described below. First, when the discharge lamp 12 of the light source device 1 is turned on, the ultraviolet light UV incident on the ultraviolet light incident end 30 of the ultraviolet light guide 3 is transmitted through the ultraviolet light guide 3 as shown by a solid line arrow in FIG. UV output end 31
To 37, and is emitted from the ultraviolet emitting ends 31 to 37 to one end of the optical rod 51 of the light emitting unit 5. Then, the ultraviolet rays UV are radiated from the outer surface of the optical rod 51 to the outside via the phosphor 52 and are reflected inside. Further, the ultraviolet light UV radiated to the outside through the fluorescent material 52 is applied to the visible light V of each functional color by the fluorescent material 52.
Is converted to L. As a result, the visible light VL of each functional color converted as described above is radiated to the outside via the ultraviolet cut tube 50 as shown by the dashed arrows in FIGS. And the visible light of each functional color is
Rear combination lamp RC shown in FIGS. 1 and 2
Are radiated from the lamps 43, 44, 45 to the outside in a predetermined light distribution pattern. For example, red light is emitted from the tail stop lamp 43, amber light is emitted from the turn signal lamp 44, and white light is emitted from the backup lamp 45 to the outside.

As described above, the structure of the light emitting portion of the present invention in this embodiment is such that the clearance C between the inner surface of the ultraviolet cut tube 50 and the phosphor 52 on the outer surface of the optical rod 51 is the convex portion of the clearance holding portion. Since the fluorescent material 52 of the light emitting unit 5 is protected by interference, friction and the like.

Particularly, in this embodiment, the following operation and effect can be achieved. That is, the light source device 1
Since the ultraviolet rays UV from the discharge lamp 12 can be effectively used, the luminous efficiency is high as in the case of a fluorescent lamp having the same principle. In addition, the lighting, turning off, blinking, etc. of the lamps 43, 44, 45 of the rear combination lamp RC are performed by separate means, so that the discharge lamp 12, which is the light source of the light source device 1, can be constantly turned on. The problem of the instant lighting of the lamp can be solved. The light emitting portions of the lamps 43, 44, and 45 of the rear combination lamp RC are composed of the ultraviolet emitting ends 31 to 37 of the ultraviolet guide 3 and the optical rods 431 to 457. There is no filling gas. For this reason, the mechanical strength increases, and the reliability of the mechanical strength increases. Furthermore, since there are no consumable parts such as electrodes and gas filling, the life is extended, the durability is increased, and maintenance is not required. That is, free maintenance is performed. Furthermore, since the ultraviolet emitting ends 31 to 37 and the optical rods 431 to 457 of the ultraviolet guide 3 have simple structures, the possibility of a novel design is increased and the degree of freedom of design is increased. In addition, the emission colors of the lamps 43, 44, 45 of the rear combination lamp RC can be freely set by the phosphors of the optical rods 431 to 457 according to the purpose of the lamp, that is, according to each functional color. There is an effect that can be.

In the first embodiment described above, the phosphor 52 is provided in a layer on the outer surface of the optical rod 51. However, the structure of the light emitting section of the present invention is
On the inner surface of the ultraviolet cut tube 50, and on the outer surface of the optical rod 51 and the ultraviolet cut tube 50.
May be provided on both of the inner surfaces.

In the above-described first embodiment, the projection 54 of the clearance holding portion is connected to the optical rod 51.
However, in the structure of the light emitting portion of the present invention, one or more convex portions 54 may be provided at one end or the other end of the optical rod 51 or at an intermediate portion.

Further, an interior light may be combined with the rear combination lamp RC. That is, the ultraviolet light emitting ends 31 to 37 of the ultraviolet light guide 3 are further divided, and the divided ultraviolet light emitting ends are connected to the light emitting portion of the room light.

FIGS. 9 to 13 show a second embodiment of the structure of the light emitting section in the vehicle lighting device of the present invention. In the drawing, the same reference numerals as those in FIGS. 1 to 8 denote the same components.

In the second embodiment, the phosphor 52
Are provided in layers on the inner surface of the ultraviolet cut tube 50 except for the clearance holding portions 54 at both ends. The clearance holding parts 54 are circular inner flange-shaped convex parts provided at both ends of the ultraviolet ray cut tube 50, and protrude from the outer surface side of the optical rod 51 so that the outer surfaces of both ends of the optical rod 51 are formed. And a convex portion that comes into contact with. Other structures are the same as those of the above-described first embodiment.

The second embodiment can achieve the same functions and effects as those of the first embodiment. In the second embodiment, the phosphor 52 is provided in a layer on the inner surface of the ultraviolet cut tube 50. However, the structure of the light emitting section of the present invention is such that the phosphor 52 is provided on the outer surface of the optical rod 51. Further, it may be provided on both the inner surface of the ultraviolet cut tube 50 and the outer surface of the optical rod 51.

In the above-described second embodiment, the projection 54 of the clearance holding section is connected to the ultraviolet cut tube 5.
Although it is provided at both ends of 0, the structure of the light emitting unit of the present invention may be such that one or more convex portions 54 are provided at one end or the other end of the ultraviolet cut tube 50 or at an intermediate portion.

FIGS. 14 to 17 show a third embodiment of the structure of the light emitting section in the vehicle lighting device of the present invention. In the figure,
1 to 13 indicate the same components.

In the third embodiment, the ultraviolet cut tube 50 has a hollow cylindrical shape with both ends opened. The phosphors 52 are provided in layers on the outer surface of the optical rod 51 except for the clearance holding portions 54 at both ends. Further, the holder has an insertion hole 530, and the ultraviolet exit end 31 of the ultraviolet guide 3.
And 37 holding the one end of the ultraviolet cut tube 50 and one end of the optical rod 51.
First holder 531 which is the same as holder 53 of the embodiment
And a cap-shaped second holder 532 holding the other end of the ultraviolet cut tube 50 and the other end of the optical rod 51 by fitting the open end of the other end of the ultraviolet cut tube 50 from the outside. Further, the clearance holding portion 54 is a convex portion having an annular shape provided inside the first holder 531 and the second holder 532, and is provided on the side of the ultraviolet rod 50 and the optical rod 51 so as to project therefrom. It comprises a convex portion interposed between the inner surface of the optical rod 50 and the outer surface of the optical rod 51. Other structures are the same as those of the above-described first and second embodiments.

The third embodiment can achieve the same functions and effects as those of the first and second embodiments. In the third embodiment, the phosphor 52 is provided on the outer surface of the optical rod 51 in a layered manner.
It may be provided on the inner surface of the ultraviolet cut tube 50, or on both the outer surface of the optical rod 51 and the inner surface of the ultraviolet cut tube 50.

In the third embodiment described above, the projections 54 of the clearance holding portion are provided on the first holder 531 and the second holder 532, respectively. The protrusion 54 is attached to the first holder 53
Only one or the second holder 532 may be provided.

Further, in the third embodiment described above,
Although the first holder 531 and the second holder 532 are used, the structure of the light emitting unit of the present invention uses only the first holder 531 as in the first and second embodiments described above. There may be. In this case, the protrusion 54 of the clearance holding portion is provided only on the first holder 531.

FIGS. 18 to 21 show a fourth embodiment of the structure of the light emitting section in the vehicle lighting device of the present invention. In the figure,
1 to 17 indicate the same components.

The light emitting section 5 in the fourth embodiment includes an ultraviolet cut tube 50 and a phosphor 52 (shown by a broken line in FIG. 18) provided on the inner surface of the ultraviolet cut tube 50. And a holder 53 for integrally holding the ultraviolet guide 3 and the ultraviolet cut tube 50 as the ultraviolet transmission path.

The ultraviolet cut tube 50 is made of, for example, soft soda glass or the like, and has a hollow cylindrical shape with one end opened and the other end closed. On the inner surface of the closed end of the ultraviolet cut tube 50, a phosphor or an ultraviolet reflector 500 (a portion shown by a grid in FIGS. 19 and 20) is provided. The phosphor 52 is provided in a layer on the inner surface of the ultraviolet cut tube 50. The holder 53 has a cap shape to fit the open end of the ultraviolet cut tube 50 from outside. A circular insertion hole 530 is provided at the center of the holder 53.
Is provided.

As shown by arrows in FIG. 18, the holder 53 is fitted to the opening end of the ultraviolet cut tube 50, and the emission ends 31 to 37 of the ultraviolet guide 3 are inserted into the insertion holes 530 of the holder 53. insert. As a result, FIG.
As shown in FIG. 9, the emission ends 31 to 37 of the ultraviolet guide 3 and the open end of the ultraviolet cut tube 50 are
Thereby, they are integrally held.

The structure of the light emitting portion of the present invention in this embodiment has the above-described structure, and the operation thereof will be described below. First, when the discharge lamp 12 of the light source device 1 is turned on, the ultraviolet light UV incident on the ultraviolet light incident end 30 of the ultraviolet light guide 3 is transmitted through the ultraviolet light guide 3 as shown in FIG. The light reaches 31 to 37 and is emitted from the ultraviolet emitting ends 31 to 37 into the ultraviolet cut tube 50 of the light emitting unit 5. Then, the ultraviolet light UV is applied to the fluorescent material 5 on the inner surface of the ultraviolet light cut tube 50.
The light is emitted to the outside through 2 and is reflected inside. Further, the ultraviolet rays UV radiated to the outside via the phosphor 52 are:
The phosphor 52 converts the light into visible light VL of each functional color. As a result, the visible light VL of each functional color converted as described above is radiated to the outside via the ultraviolet cut tube 50 as shown by the dashed arrow in FIGS. Then, the visible light of each functional color is emitted from the respective lamps 43, 44, 45 of the rear combination lamp RC shown in FIGS. 1 and 2 to the outside in a predetermined light distribution pattern. For example, red light is emitted from the tail stop lamp 43, and amber light is emitted from the turn signal lamp 44.
Therefore, the white light is emitted from the backup lamp 45 to the outside.

As described above, the structure of the light emitting unit according to the present invention in this embodiment includes the ultraviolet cut tube 50 and the phosphor 5 provided on the inner surface of the ultraviolet cut tube 50.
2 and the holder 53 for integrally holding the ultraviolet guide 3 and the ultraviolet cut tube 50, the light emitting portion 5 is constituted, so that an optical rod is not required, so that the number of parts is reduced, and the optical A means for maintaining the clearance between the rod and the ultraviolet cut tube 50 to protect the phosphor 52 from interference, friction, and the like becomes unnecessary. Thereby, simplification of the structure of the light emitting section 5 and reduction of cost can be achieved.

In the above-described embodiment, if the above-mentioned ultraviolet cut tube 50 is formed of fluorescent glass, resin, or the like, the phosphor 52 becomes unnecessary. As a result, the structure is further simplified, and the cost is reduced. That is, the structure of the light emitting section 5 is further simplified and the cost is further reduced.

Particularly, in this embodiment, the following operation and effect can be achieved. That is, the light source device 1
Since the ultraviolet rays UV from the discharge lamp 12 can be effectively used, the luminous efficiency is high as in the case of a fluorescent lamp having the same principle. In addition, the lighting, turning off, blinking, etc. of the lamps 43, 44, 45 of the rear combination lamp RC are performed by separate means, so that the discharge lamp 12, which is the light source of the light source device 1, can be constantly turned on. The problem of the instant lighting of the lamp can be solved. In addition, since the light emitting portion of each of the lamps 43, 44, 45 of the rear combination lamp RC includes the ultraviolet emitting ends 31 to 37 of the ultraviolet guide 3 and the ultraviolet cut tube 50, the light emitting portion includes electrodes and the like. There is no filling gas. For this reason, the mechanical strength increases, and the reliability of the mechanical strength increases. further,
Since there are no consumable parts such as electrodes and gas filling, the life is extended, the durability is increased, and maintenance is not required. That is, free maintenance is performed. Furthermore, since the ultraviolet emitting ends 31 to 37 of the ultraviolet guide 3 and the optical rods 431 to 457 have simple structures,
The possibility of innovative design is increased, and the degree of freedom in design is increased. Besides, the rear combination lamp R
The emission color of each of the lamps 43, 44, 45 of C can be freely set by the fluorescent substance according to the purpose of the lamp, that is, according to each functional color.

In the first to fourth embodiments, each lamp 4 of the rear combination lamp RC is used.
Although the example used for the vehicle lighting device (fluorescent lamp for vehicle lighting) such as 3, 44, and 45 has been described, the vehicle lighting device of the present invention is also applicable to other lamps, such as interior lights and headlamps. Applicable.

[0047]

As described above, the vehicle lighting device of the present invention can utilize the ultraviolet light of the discharge lamp of the light source device.

The structure of the light emitting portion in the vehicle lighting device of the present invention is such that the clearance between the inner surface of the ultraviolet cut tube or the outer surface of the optical rod and the phosphor is maintained by the clearance holding portion. Phosphor can be protected from interference and friction.

Further, the structure of the light emitting portion in the vehicle lighting device of the present invention does not require an optical rod, so that the number of parts is reduced, and the fluorescent light is maintained while maintaining the clearance between the optical rod and the ultraviolet cut tube. There is no need for any means for protecting the body from interference and friction. As a result, the structure is simplified and the cost is reduced. Further, by using an ultraviolet cut tube formed of a fluorescent glass or a resin, a phosphor is not required, so that the structure is simplified and the cost is reduced.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a vehicle lighting device of the present invention,
FIG. 2 is a perspective view schematically illustrating an example in which the vehicle lighting device of the present invention is used for a rear combination lamp.

FIG. 2 is a longitudinal sectional view of a light source device used in the vehicle lighting device of the present invention.

FIG. 3 is an exploded perspective view of the light emitting unit of the present invention, showing a first embodiment of the structure of the light emitting unit in the vehicle lighting device of the present invention.

FIG. 4 is a longitudinal sectional view of the light emitting unit of the present invention in an assembled state.

FIG. 5 is an enlarged vertical sectional view of the other end of the light emitting unit of the present invention in an assembled state.

FIG. 6 is a longitudinal sectional view showing the optical paths of ultraviolet light and visible light.

FIG. 7 is a longitudinal sectional view showing an optical path of visible light.

FIG. 8 is a side view showing an optical path of visible light.

FIG. 9 is an exploded perspective view of the light emitting unit of the present invention, showing a second embodiment of the structure of the light emitting unit in the vehicle lighting device of the present invention.

FIG. 10 is a longitudinal sectional view of the light emitting unit of the present invention in an assembled state.

FIG. 11 is an enlarged vertical sectional view of the other end of the light emitting unit of the present invention in an assembled state.

FIG. 12 is a vertical sectional view showing the optical paths of ultraviolet light and visible light.

FIG. 13 is a longitudinal sectional view showing an optical path of visible light.

FIG. 14 is an exploded perspective view of the light emitting unit of the present invention, showing a third embodiment of the structure of the light emitting unit in the vehicle lighting device of the present invention.

FIG. 15 is a longitudinal sectional view of the light emitting unit of the present invention in an assembled state.

FIG. 16 is an enlarged vertical sectional view of the other end of the light emitting unit of the present invention in an assembled state.

FIG. 17 is a vertical sectional view showing the optical paths of ultraviolet light and visible light.

FIG. 18 is an exploded perspective view of the light emitting unit of the present invention, showing a fourth embodiment of the structure of the light emitting unit in the vehicle lighting device of the present invention.

FIG. 19 is also a longitudinal sectional view of the light emitting unit of the present invention in an assembled state.

FIG. 20 is a vertical sectional view showing the optical paths of ultraviolet light and visible light.

FIG. 21 is a longitudinal sectional view showing an optical path of visible light.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Light source device, 10 ... Casing, 11R ... Right reflection surface, 11L ... Left reflection surface, 12 ... One discharge lamp (light source), 13R ... Right light emitting port, 13L ... Left light emitting port, F1
.. Common first focus, F2R right right second focus, F2L left left focus, ZZ optical axis, L1, L1R, L1R light (ultraviolet), UV ultraviolet, VL visible light, 2. Optical lens, 3 ... Ultraviolet guide (ultraviolet ray transmission path), 30 ... Ultraviolet incident end, 31-37 ... Ultraviolet exit end, RC ... Rear combination lamp (fluorescent lamp for vehicle illumination), 4
3: tail stop lamp, 44: turn signal lamp, 45: backup lamp, 5 (431-457)
... Light-emitting part, 50 ... UV cut tube, 51 ... Optical rod, 52 ... Phosphor, 53 ... Holder, 530
... Insertion holes, 531, first holder, 532, second holder, 54, clearance holding portion (projection), C, clearance.

Claims (8)

[Claims] 1. A light source device using a discharge lamp mounted on a vehicle as a light source, wired between the light source device and a predetermined position of the vehicle,
An ultraviolet light transmission path that transmits ultraviolet light from the light source device to a predetermined position of the vehicle, and is disposed at a predetermined position of the vehicle, and converts the ultraviolet light transmitted through the ultraviolet light transmission path into visible light by a phosphor of a light emitting unit. And a fluorescent lamp for vehicle illumination that irradiates the vehicle with light to the outside. 2. A light source device that uses a discharge lamp mounted on a vehicle as a light source, and is wired between the light source device and a predetermined position of the vehicle,
An ultraviolet light transmission path that transmits ultraviolet light from the light source device to a predetermined position of the vehicle, and is disposed at a predetermined position of the vehicle, and converts the ultraviolet light transmitted through the ultraviolet light transmission path into visible light by a phosphor of a light emitting unit. A fluorescent lamp for vehicle illumination that irradiates the ultraviolet light to the outside, wherein the light emitting unit comprises: an ultraviolet cut tube; an optical rod housed in the ultraviolet cut tube; and an inner surface of the ultraviolet cut tube. Or the phosphor provided on the outer surface of the optical rod; a holder for integrally holding the ultraviolet transmission path, the ultraviolet cut tube, and the optical rod; and the inner surface of the ultraviolet cut tube or the outer surface of the optical rod. A clearance maintaining section for maintaining a clearance between the phosphor and the phosphor; Structure of the light emitting portion in the vehicle lighting device according to claim are configured, that. 3. The clearance holding portion is a convex portion provided on the optical rod, and includes a convex portion protruding from the UV cut tube and abutting on the UV cut tube. The structure of a light emitting unit in the vehicle lighting device according to claim 2. 4. The clearance holding portion is a convex portion provided on the ultraviolet cut tube, and is formed of a convex portion protruding from the optical rod side and abutting on the optical rod. A structure of a light emitting unit in the vehicle lighting device according to claim 2. 5. The clearance holding portion is a projection provided on the holder and protrudes from the optical rod and the ultraviolet ray cut tube to intervene between the optical rod and the ultraviolet ray cut tube. The structure of the light-emitting unit in the vehicle lighting device according to claim 2, wherein the light-emitting unit comprises a convex portion. 6. The first holder, which integrally holds an emission end of the ultraviolet transmission path, one end of the ultraviolet cut tube, and one end of the optical rod, and the other end of the ultraviolet cut tube, and the optical rod. And a second holder that integrally holds the other end of the first holder, wherein the clearance holding portion is the convex portion provided on the first holder and / or the second holder. The structure of the light emitting unit in the vehicle lighting device according to (1). 7. A light source device that uses a discharge lamp mounted on a vehicle as a light source, and is wired between the light source device and a predetermined position of the vehicle,
An ultraviolet light transmission path that transmits ultraviolet light from the light source device to a predetermined position of the vehicle, and is disposed at a predetermined position of the vehicle, and converts the ultraviolet light transmitted through the ultraviolet light transmission path into visible light by a phosphor of a light emitting unit. A fluorescent lamp for vehicle illumination that irradiates the ultraviolet light to the outside, wherein the light emitting unit includes: an ultraviolet cut tube; a phosphor provided on an inner surface of the ultraviolet cut tube; And a holder for integrally holding the ultraviolet cut tube. The structure of the light emitting unit in the vehicle lighting device, comprising: 8. A light source device that uses a discharge lamp mounted on a vehicle as a light source, and is wired between the light source device and a predetermined position of the vehicle,
An ultraviolet light transmission path that transmits ultraviolet light from the light source device to a predetermined position of the vehicle, and is disposed at a predetermined position of the vehicle, and converts the ultraviolet light transmitted through the ultraviolet light transmission path into visible light by a phosphor of a light emitting unit. And a fluorescent lamp for vehicle illumination that irradiates the ultraviolet light to the outside, wherein the light emitting unit integrally includes an ultraviolet light cut tube formed of fluorescent glass or resin, the ultraviolet light transmission path, and the ultraviolet light cut tube. A light emitting unit structure in a vehicle lighting device, comprising: