JPWO2012023602A1 - Vehicle lighting - Google Patents

Abstract

An object of the present invention is to provide a vehicular lamp that can easily have a different light emitting design for each vehicle owner. A vehicular lamp according to the present invention includes a point light source, a substrate, a cylindrical frame, a bottom reflecting portion, a side reflecting portion, and a light beam disposed in the frame. A surface that is composed of the conductive reflection plate 3 and the translucent cover 8 and that faces the light conduction reflection plate 3 of the bottom surface reflection portion 5, an inner surface of the side surface reflection portion 4, and a surface that faces the bottom surface reflection portion 5 of the light conduction reflection plate 3. Is formed of a member having a high light reflectivity and a low light transmittance, and is provided with a locking bent portion 2c at one end of the opening of the frame 2 and side reflection on the inner surface side. The aperture 4b and the narrow groove 3a3 are formed so that the light conducting reflector 3 has a desired light emission pattern, and the locking bent portion 2c of the frame 2 and the side reflection portion 4 are formed. The side reflector 4 is sandwiched between the other end of the frame 2 and the bottom reflector 5 fixed to the substrate 7. In are held.

Description

  The present invention relates to a vehicular lamp such as various automobiles and two-wheeled vehicles using a highly directional point light source such as at least one light emitting diode (hereinafter referred to as “LED”), and more specifically, for each vehicle owner. The present invention relates to a vehicular lamp such as a taillight, a stoplight, or a blinker light, which can have different light emitting designs.

  In recent years, research and development of LEDs have progressed rapidly, and various types of LEDs have been developed and commercialized and used in a wide range of fields. LEDs have been conventionally used as operation indicator lamps for electronic devices because of their low power consumption, long life, and small size. These LEDs are often used, for example, in backlights for liquid crystal panels, various display boards, electric bulletin boards, and electrical decoration devices. Halogen lamps and discharge lamps that emit filament light have been the mainstream in the conventional lighting field for vehicles, but with the recent progress of higher output of LEDs, LEDs are also used in the lighting field for vehicles. It has become to. In the vehicle lighting field, for example, vehicle lamps incorporating a plurality of LEDs in automobile headlights, taillights, stoplights, turn signal lights, room lamps, speedometer illumination lights, and the like are used.

  For example, the following Patent Document 1 shows a vehicle LED lamp 50 used for a vehicle lamp, for example, as shown in FIG. This vehicular LED lamp 50 is back-to-back with a first light source unit 53 comprising a plurality of bullet-type LED groups 52 arranged in a circular opening 51 at the front surface of the lamp having a predetermined area, and a side body 54 of the lamp. A second light source unit 56 composed of a pair of flux-type LED groups 55 is attached to a base 57. The vehicle LED lamp 50 can be replaced with, for example, a 12V specification S25 type BAY15d / BAS15s bulb, which is normally used in a lamp for a conventional ordinary vehicle, truck, two-wheeled vehicle or the like.

  Further, Patent Document 2 below shows a vehicular lamp 60 that can be switched between lighting modes and includes a light source composed of a plurality of LEDs as shown in FIGS. 11A and 11B, for example. The vehicular lamp 60 includes a configuration in which each of the light sources 62 of the lamp unit 61 is composed of nine red LEDs 63 arranged in a square shape in three vertical and horizontal directions, and the center of each light source 62 among these nine red LEDs 63. The arranged red LED 63A is turned on in the taillight lighting mode, and the red LED 63B surrounding the red LED 63A is turned on together with the red LED 63A in the stoplight lighting mode.

JP 2005-26875 A JP 2002-93212 A

  According to the vehicular LED lamp 50 described in the above-mentioned Patent Document 1, it can be replaced with a light bulb for a vehicle normally used for a lamp of a conventional ordinary automobile, a truck, a two-wheeled automobile, etc. However, in order to accommodate a large number of LEDs in the same size as a conventional vehicle bulb, it is difficult to increase the output because it is difficult to dissipate heat in mounting. In addition, according to the vehicle lamp 60 shown in Patent Document 2, since the central red LED 63A is lit in both the taillight lighting mode and the stoplight lighting mode, drivers of other vehicles, etc. However, since the light emission pattern of each light source 62 is fixed, for example, in order to change the light emission design for each vehicle owner, the surface of each light source 62 is changed. It was necessary to change the design of the light-transmitting cover 64 to be formed, and it was difficult to easily perform it.

  The present invention has been made to solve such problems of the prior art, and has at least one point light source having strong directivity such as an LED, and the arrangement of the at least one point light source is fixed. However, an object of the present invention is to provide a vehicular lamp such as a taillight, a stoplight, or a blinker light, which can easily have a different light emission design for each vehicle owner.

  To achieve the above object, a vehicular lamp according to the present invention includes at least one highly directional point light source, a substrate to which the point light source is attached, a cylindrical frame, and a bottom surface disposed in the frame. In the vehicular lamp, comprising: a reflecting portion, a side reflecting portion, a light conducting reflecting plate, and a translucent cover attached to the front surface of the light conducting reflecting plate, the light conducting reflection of the bottom reflecting portion. The surface facing the plate, the inner surface of the side reflecting portion, and the surface facing the bottom reflecting portion of the light conducting reflecting plate are formed of a member having high light reflectivity and low light transmittance, and the frame Has openings on both sides having the same shape as the light-conducting reflecting plate, and a locking bent portion is provided at one end of the opening, and the side reflecting portion is disposed on the inner surface side. The light conducting reflector has a predetermined light emitting design A plurality of apertures or grooves are formed and are sandwiched between the locking bent portion of the frame and the side reflecting portion, and the side reflecting portion is connected to the other end of the frame, and It is hold | maintained by the said bottom surface reflection part fixed to the board | substrate.

  According to the vehicular lamp of the present invention, it is possible to achieve a desired light emitting design by appropriately changing the arrangement of the apertures or grooves formed in the light-conducting reflector, and it is easily requested by the owner of the vehicle. The light emitting design can be adapted to the vehicle, and the added value of the vehicle is improved. Moreover, in the vehicular lamp of the present invention, the bottom surface reflection portion, the side surface reflection portion, and the light conducting reflection plate are fixed integrally with each other by fixing the substrate on which the point light source is attached and the cylindrical frame, respectively. Therefore, the configuration becomes simple and the assembly becomes easy. Moreover, unlike the conventional example, it is not necessary to provide a locking claw or a locking hole for fixing the bottom surface reflection portion, the side surface reflection portion, and the light conducting reflection plate, so that deformation hardly occurs and unevenness is not easily generated. Light utilization efficiency is improved.

  The translucent cover in the vehicular lamp of the present invention is colored in red when used as a taillight or stoplight, and colored in orange when used as a blinker light. It is preferable to use the above. Moreover, the shape of this translucent cover can be suitably determined according to the design of the vehicle.

  In the vehicular lamp of the present invention, it is preferable that the locking bent portion is formed by bending an end portion of the frame inward.

  According to the vehicular lamp of the present invention, since the locking portion can be formed simply by bending the end portion of the frame inward, it is not necessary to separately prepare a dedicated mold, and the frame can be easily and inexpensively manufactured. This leads to cost reduction of the vehicular lamp of the present invention. The material of the frame is not particularly limited, but it is preferable to form the frame from a metal material such as aluminum because fire resistance is improved.

  In the vehicular lamp of the present invention, it is preferable that a protective plate having a high light transmittance is provided between the light conducting reflection plate and the locking portion.

  Since the light conducting reflector is used to obtain a desired light emitting design by using a point light source having strong directivity such as an LED as a light source, an aperture or a groove is formed. According to the vehicular lamp of the present invention, since the protective plate is provided between the light conducting reflector and the locking portion, the light conducting reflector is not directly exposed to the outside. Intrusion of dust can be prevented, and a vehicular lamp can be obtained with little decrease in illuminance even when used for a long time. In addition, since the surface of the vehicular lamp can be flattened, dust and the like attached to the surface can be easily removed. In addition, even if it is a transparent thing and a thing which has a light-scattering effect | action as a protective plate, it can be used.

  In the vehicular lamp of the present invention, it is preferable that the protective plate is provided with a plurality of convex portions on the light irradiation surface.

  When a plurality of convex portions are formed on the light irradiation surface of the protective plate, the irradiation light is diffused in various directions. Therefore, according to the vehicular lamp of the present invention, the illumination range can be expanded even if the illuminance is not necessarily uniform.

  In the vehicular lamp of the present invention, it is preferable that the convex portions are provided at equal intervals.

  When a plurality of convex portions are provided at equal intervals, regularity can be achieved in the variation of irradiation light. Therefore, according to the vehicular lamp of the present invention, the illumination range can be expanded without increasing the difference in illuminance within the illumination range.

  In the vehicular lamp according to the present invention, the translucent cover may be provided between the light conducting reflection plate and the locking bent portion of the frame.

  If the light-transmitting cover is provided between the light-conducting reflection plate and the bent portion for locking the frame, the thickness of the vehicular lamp of the present invention can be reduced, and the protective cover is provided on the light-transmitting cover. Therefore, the intrusion of dust into the interior of the vehicular lamp can be prevented, and a vehicular lamp with a reduced illuminance even when used for a long period of time can be obtained.

  In the vehicular lamp of the present invention, it is preferable that half-cut portions perpendicular to the bottom surface portion are formed at equal intervals on the outer surface side of the side surface reflection portion.

  According to the vehicular lamp of the present invention, since the frame is cylindrical, when the semi-cut portions perpendicular to the bottom surface portion are formed at equal intervals on the outer surface side of the side reflection portion, the side reflection portion is formed into a cylindrical shape. It becomes easy to arrange | position along the inner surface of a flame | frame, and the illumination light which has a more uniform illumination distribution can be obtained now.

  In the vehicular lamp of the present invention, it is preferable that the frame is provided with a fixing means that is fixed on the substrate on a side in contact with the substrate.

  According to the vehicle lamp of the present invention, the fixing means that is fixed on the substrate is provided on the side of the frame that is in contact with the bottom surface reflection portion, so that the fixing between the frame and the substrate is facilitated.

  In the vehicle lamp of the present invention, it is preferable that the fixing means is attached to the frame so as to be parallel to the substrate, and is fixed to the substrate by soldering.

  According to the vehicular lamp of the present invention, the fixing means is attached to the frame so as to be parallel to the substrate, and is fixed onto the substrate by soldering, so that the substrate and the fixing means can be easily and firmly secured. Can be fixed

  In the vehicular lamp of the present invention, the light conducting reflector is configured such that the light transmittance increases and the light reflectance decreases as the distance from the point light source increases. Is preferred.

  According to the vehicular lamp of the present invention, the light emitted from the point light source can be converted into light having uniform illuminance over the entire surface by the optical copper through reflector, and a wide range can be illuminated brightly.

  In the vehicular lamp of the present invention, it is preferable that the bottom surface reflection portion, the side surface reflection portion, and the light conducting reflection plate are integrally formed.

According to the vehicular lamp of the present invention, the bottom surface reflecting portion, the side surface reflecting portion, and the light conducting reflector can be formed of the same material. Since the bottom surface reflection part, the side surface reflection part, and the photoconductive reflection plate that can be used in the above can be manufactured, the manufacturing efficiency is improved.
In the vehicular lamp of the present invention, it is preferable that the bottom surface reflection portion, the side surface reflection portion, and the light conducting reflection plate are formed of an ultrafine foamed light reflection member.

  According to the vehicular lamp of the present invention, by using the ultrafine foamed light reflecting member having high light reflectance and low light transmittance as the member that forms the bottom surface reflecting portion, the side surface reflecting portion, and the light conduction reflecting plate, The light emitted from the light source can be used with high efficiency without loss.

1 is a perspective view of a vehicular lamp according to a first embodiment of the present invention. It is a disassembled perspective view of the vehicle lamp of FIG. 3A is a cross-sectional view taken along line IIIA-IIIA in FIG. 1, FIG. 3B is an enlarged view of the IIIB portion of FIG. 3A, and FIG. 3C is an enlarged view of the IIIC portion of FIG. It is a top view of the photoconductive reflection plate which concerns on 1st Embodiment of this invention. It is an expanded view of the reflection part formation member which concerns on other embodiment of this invention. 6A and 6B are plan views of a light-conducting reflector according to a modification. FIG. 7A is a sectional view of a vehicular lamp according to a second embodiment of the present invention, and FIG. 7B is an enlarged view of a VIIB portion of FIG. 7A. FIG. 8 is a schematic view showing an example of the flame-retardant processing of the photoconductive reflector of FIG. FIG. 9 is a schematic view showing another example of the flame-retardant processing of the light transmissive reflecting plate of FIG. It is a perspective view of the LED lamp for vehicles used for the vehicle lamp of a prior art example. 11A is a plan view of another conventional vehicular lamp, and FIG. 11B is a cross-sectional view taken along line XIB-XIB in FIG. 11A.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. However, each embodiment shown below exemplifies a vehicular lamp for embodying the technical idea of the present invention, and is not intended to specify the present invention. It is equally applicable to those of other embodiments within the scope.

[First Embodiment]
First, with reference to FIGS. 1-4, the vehicle lamp which concerns on 1st Embodiment of this invention is demonstrated. 1 is a perspective view of the vehicular lamp according to the first embodiment of the present invention, FIG. 2 is an exploded perspective view of the vehicular lamp of FIG. 1, and FIG. 3A is a cross-sectional view taken along the line IIIA-IIIA of FIG. 3B is an enlarged view of the IIIB portion of FIG. 3A, FIG. 3C is an enlarged view of the IIIC portion of FIG. 3A, and FIG. 4 is a plan view of the photoconductive reflector according to the first embodiment of the present invention.

  In the vehicular lamp 1 according to the present embodiment, a light conducting reflector 3 and a side reflector 4 are disposed inside a frame 2, and a bottom light reflector 5 and a highly directional point light source 6 such as an LED are fixed. The frame 2 is attached to the substrate 7, and the light transmitting cover 8 is formed on the substrate 7 so as to cover the light conducting reflection plate 3. For example, the inner diameter of the light emitting surface of the vehicular lamp 1 is 60 mm.

  The translucent cover 8 is colored red when the vehicular lamp 1 is used as a taillight or stoplight, and colored orange when the vehicular lamp 1 is used as a blinker light. In this example, a hemispherical shape is shown, but an arbitrary shape can be used depending on the design of the vehicle. Further, the translucent cover 8 may be directly attached to the frame 2.

  In the embodiment, the frame 2 is formed of a cylindrical frame 2a having circular openings 2b formed at both ends, and a relatively inexpensive material such as a metal material or a synthetic resin is used. In particular, it is preferable to use a metal material such as aluminum which is light and inexpensive and has high fire resistance, but other materials can also be used. The shape of the opening 2b is circular in the present embodiment, but is not limited to this shape, and may be an elliptical shape, a polygonal shape, an indefinite shape (for example, a star shape, a heart shape, etc.) It may be determined arbitrarily according to the design.

  One end of the frame 2 is formed with a locking bent portion 2c that is bent toward the inner diameter side so that the light conducting reflection plate 3 does not fall off. At the other end, a flange 2d for fixing the frame 2 to the substrate 7 is formed. The light conducting reflection plate 3 is inserted into the frame 2 from one end where the flange 2d is formed, and is in contact with the locking bent portion 2c.

  The light conducting reflection plate 3 has a predetermined thickness and is made of a material such as an ultrafine foamed light reflecting member having a high light reflectance and a low light transmittance. Thereby, the light from the point light source 6 can be reflected with high light reflectivity and can be used efficiently, and since a certain amount of light is transmitted even directly above the point light source 6, the light directly above the point light source 6. The part will not be too dark. Further, since the ultrafine foamed light reflecting member is easily available and relatively inexpensive, the manufacturing cost can be suppressed. As shown in FIG. 4, the light conducting reflection plate 3 has a central light conducting reflection portion 3a directly above the point light source 6 made of, for example, an LED, and an outer light conducting reflection portion around the center light conducting reflection portion 3a. 3b is provided.

  A central portion 3a1 is provided in the central portion of the central light conducting / reflecting portion 3a, that is, the portion directly above the point light source 6. The central portion 3a1 is formed with a high light reflectance, reflects strong light radiated from the point light source 6, and the reflected light is multiple-reflected by the side surface reflection portion 4, the bottom surface reflection portion 5, and the photoconductive reflection plate 3. It is like that. The light reflectivity of the central portion 3a1 is appropriately set by selecting an optical reflecting plate material and processing the material (eg, forming a half groove, adjusting the plate thickness) so that light can be used efficiently. become. A peripheral portion 3a2 is provided in the periphery of the central portion 3a1, that is, at the boundary portion with the outward light conducting reflection portion 3b. The peripheral portion 3a2 is provided with an arc-shaped narrow groove 3a3, which is designed to transmit light partially while increasing the light reflectivity next to the central portion 3a1. In addition, by forming the narrow groove 3a3, light emitted from the point light source while having a predetermined light transmittance is prevented from being directly conducted through the photoconductive reflector. The narrow groove 3a3 may be replaced with a small hole.

  A circular opening 3b1 for forming a predetermined light emitting design is formed in the outer light conducting reflection portion 3b. The shape and the hole diameter of the opening 3b1 may be determined as appropriate in order to obtain a predetermined light emitting design, and are arbitrary. Here, an example is shown in which it is formed so as to gradually increase as it moves away from the central light conducting reflection portion. The narrow groove 3a3 and the opening 3b1 are designed to conduct light emitted from the point light source 6 and reflected at least once by the side reflection part 4, the bottom reflection part 5, and the light conducting reflection plate 3. Thus, even if a point light source 6 having a strong directivity such as an LED is used, the illuminance can be prevented from dropping even in the peripheral portion, and a desired light emitting design can be easily achieved over the entire surface. become.

  A side reflecting portion 4 that is curved along the inner wall of the frame 2 is disposed on the frame 2 in which the light conducting reflection plate 3 is incorporated. Similar to the light conducting reflector 3, the side reflector 4 is made of a material such as an ultrafine foamed light reflector having a predetermined thickness, a high light reflectance, and a low light transmittance. 2 is substantially equal to the inner circumference of 2, and the height is h4 obtained by subtracting the thickness h1 of the locking bent portion 2c and the thickness h3 of the light conducting reflector 3 from the height h of the frame 2.

  When the side reflection part 4 is curved and inscribed in the frame 2, the end 4 a of the side reflection part slightly floats from the frame 2 unless any processing is performed, and a so-called drop-shaped shape is obtained. It becomes impossible to reflect light uniformly. Therefore, half-cut processing is performed on the outside of the side reflecting portion 4 at equal intervals, and then bent to form a regular polygonal shape when viewed from the light emission direction, thereby preventing the end portion 4a from floating from the frame 2. doing. In this embodiment, half-cutting is performed at intervals of 3 mm. The smaller the half-cutting interval is, the closer the regular polygonal shape is to a circle. However, if the half-cutting interval is about 5 mm, the object can be achieved.

  In addition, when the plate material is rounded and formed into a cylindrical shape, the frame 2 may be formed with a joining portion 2e that is overlapped at both ends and bent toward the inner wall side. If it exists, the side reflection part 4 may float also in that part. In order to prevent this, the side reflecting part 4 is joined after the inner wall is made to make a round by bringing one end 4a of the side reflecting part 4 into contact with the frame 2 from a position corresponding to the side face of the joining part 2e. It is preferable that at least two portions of the portion covering the portion 2e are also semi-cut and bent into a shape along the joint portion 2e.

  In the state in which the side reflecting portion 4 is disposed on the frame 2, the photoconductive reflector 3 and the side reflecting portion 4 are not yet fixed, and these fixings are performed by attaching the frame 2 to be described later to the substrate 7. It is done by attaching.

  The substrate 7 has a point light source 6 attached to the center, and is connected to a power source via a connector (not shown). In the present embodiment, the substrate 7 has a rectangular shape, but may have other shapes such as a circle. The point light source 6 is an LED having one light emitting element or a plurality of light emitting elements, and the number thereof is arbitrary as long as desired brightness is obtained. In addition, a laser diode or the like can be used instead of the LED.

After the point light source 6 is attached to the substrate 7, the bottom surface reflection portion 5 is attached in advance by a double-sided tape or the like. Similar to the light conducting reflector 3 and the side reflector 4, the bottom reflector 5 is made of a material such as an ultrafine foamed light reflector having a predetermined thickness and high light reflectance and low light transmittance. It is a circle that is inscribed in the side-surface reflecting portion 4 formed in a polygonal shape. Also, the hole 5 ₀ for passing the point light source 6 is provided at the center of the bottom surface reflection portion 5.

  On the substrate 7, the frame 2 on which the light conducting reflection plate 3 and the side surface reflection portion 4 are first arranged is arranged so that the bottom surface reflection portion 5 is inscribed in the side surface reflection portion 4. The height of the side reflecting portion 4 is h4 obtained by subtracting the thickness h1 of the locking bent portion 2c and the thickness h3 of the light conducting reflecting plate 3 from the height h of the frame 2, and the bottom reflecting portion 5 is a side surface. Since it is designed so as to be inscribed in the reflecting portion 4, it can be fixed without generating a gap between the frame 2, the light conducting reflecting plate 3, the side reflecting portion 4, and the bottom reflecting portion 5.

  The frame 2 is fixed by soldering the flange 2d to the substrate 7. Usually, a point light source 6 and the like are fixed to the substrate 7 by soldering, and the frame 2 can be easily and firmly fixed by soldering similarly. In addition, when the flange 2d of the frame 2 is formed of a material that cannot be soldered, it is also possible to provide a slit for inserting the flange 2d in the substrate 7 and insert the flange 2d and bend it on the back surface to be fixed. is there. Then, the translucent cover 8 is fixed to the board | substrate 7, and the vehicle lamp 1 of embodiment is completed.

  In the present embodiment, a protective plate may be attached between the frame 2 and the light conducting reflection plate 3 in order to increase the durability of the vehicular lamp 1. The protective plate has a predetermined thickness and is formed of a material such as an acrylic plate or a glass plate having high strength and high light transmittance. In addition, even if this protection board is a transparent thing and what has a light-scattering effect | action, it can be used. The protective plate has a diameter substantially equal to the inner diameter of the frame 2 and preferably has a thickness of about 3 mm in this embodiment. This protective plate can prevent dust from entering the interior of the vehicular lamp 1 formed by the light conducting reflector 3, the side reflector 4, and the bottom reflector 5, which will be described later. A small number of vehicle lamps 1 can be obtained. In addition, since the surface of the vehicular lamp 1 can be flattened, dust and the like attached to the surface can be easily removed.

  Moreover, in this embodiment, although the example which formed the light-conduction reflection board 3, the side surface reflection part 4, and the bottom face reflection part 5 separately was shown, even if it forms integrally from one ultrafine foaming light reflection member. Good. FIG. 5 is a development view of the reflection portion forming member 9 in which the light conducting reflection plate 3, the side surface reflection portion 4, and the bottom surface reflection portion 5 are integrally formed. The reflecting portion forming member 9 is formed with a light conducting reflecting plate 3 on one long side of the side reflecting portion 4 and a bottom reflecting portion 5 on the other, and the light conducting reflecting plate 3 and the bottom reflecting portion 5 are side reflecting portions. It is not completely separated from 4 and is joined by a bent portion 9a. The bent portion 9a is half cut on the surface opposite to the bending direction, and when the light conducting reflector 3 and the bottom reflecting portion 5 are bent vertically from the side surface reflecting portion 4, the bent portion 9a is half cut. Since the part opens, it can be bent easily.

  In the vehicular lamp 1 according to the first embodiment, the openings 3b1 and the narrow grooves 3a3 formed in the light-conducting reflection plate 3 for obtaining a desired light-emitting design have a pattern as shown in FIG. However, the pattern of the openings or grooves can be arbitrarily set. For example, as shown in FIG. 6A, a small-diameter opening 3b2 may be formed in a ring shape at the center, and openings 3b3 having a larger diameter and the same diameter may be formed radially. Further, as shown in FIG. 6B, the small-diameter opening 3b4, the medium-diameter opening 3b5, and the large-diameter opening 3b6 may be formed symmetrically. Further, the grooves may be appropriately made separately. With such a configuration, it is possible to achieve a desired light emitting design simply by changing the light conducting reflection plate 3, so that it becomes possible to easily meet the demands of the vehicle owner, greatly increasing the added value to the vehicle. Will be able to.

[Second Embodiment]
Next, with reference to FIGS. 7-9, the vehicle lamp which concerns on 2nd Embodiment of this invention is demonstrated. 7A is a cross-sectional view of the vehicular lamp according to the second embodiment of the present invention, FIG. 7B is an enlarged view of the VIIB portion of FIG. 7A, and FIG. 8 is a flame-retardant processing of the light conducting reflector of FIG. FIG. 9 is a schematic diagram showing another example of the flame-retardant processing of the light transmissive reflecting plate of FIG.

  The vehicular lamp according to the second embodiment of the present invention is obtained by partially changing the configuration of the vehicular lamp according to the first embodiment of the present invention. In the following description, the same components as those in the vehicle lamp according to the first embodiment will be denoted by the same reference numerals, overlapping description will be omitted, and different components will be described in detail.

  In the vehicular lamp according to the second embodiment of the present invention, the vehicle according to the first embodiment is performed in such a manner that the light conducting reflector 3, the side reflector 4, and the bottom reflector 5 themselves are processed to be flame retardant. It is different from the lighting fixture. FIG. 7B is an enlarged view of the VIIB portion of FIG. 7A, but a coating layer 10 made of a flame retardant material is formed around the photoconductive reflector 3 and the side reflector 4. Similarly, a coating layer 10 made of a flame retardant material is also provided on the side reflecting portion 4. As shown in FIG. 8, this processing is performed by applying a flame retardant material such as a known boric acid compound to both the front and back surfaces of the light conducting reflector 3 or by applying a light conducting reflector as shown in FIG. 3 is immersed in a liquid flame retardant material 11. Although not shown in the drawing, the processing to the side reflecting portion 4 and the bottom reflecting portion 5 is similarly performed. Using such a flame retardant material 11, the photoconductive reflector 3, the side reflector 4, and the bottom reflector 5 formed of an ultrafine foamed light reflector having low heat resistance are coated to make the flame retardant. Thus, a lighting device having fire resistance can be manufactured at low cost.

Alternatively, a known flame retardant material such as paraxylylene resin or polyethylene terephthalate may be coated around the photoconductive reflector 3, the side reflector 4, and the bottom reflector 5 by a method such as vacuum deposition. good. In particular, paraxylylene is preferably used because it has little influence on the light absorption rate and the like. The processing by the vacuum deposition method is suitable for mass production of vehicular lamps because a large amount of the light conducting reflection plate 3, the side surface reflection portion 4, and the bottom surface reflection portion 5 can be processed. As described above, the fire resistance of the vehicular lamp according to the present embodiment can be improved also by increasing the flame retardance of the light conducting reflector 3, the side reflector 4, and the bottom reflector 5. The manufacturing cost of the vehicular lamp can be suppressed while suppressing a decrease in usage efficiency. Also, instead of coating a flame retardant resin, a light conducting reflection plate, a side reflection part, and a bottom reflection part may be formed using a polycarbonate resin, which is a highly flame retardant member with a reduced light reflectance. Good. In addition, the surface of the light conducting reflecting plate made of a foamed material such as polyethylene, polyolefin, or polypropylene may be coated with a ceramic powder, titanium white, a pure silver coating material provided with an antioxidant coating, or the like.

DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Frame 3 ... Light conduction reflecting plate 4 ... Side reflection part 5 ... Bottom reflection part 6 ... Point light source which consists of LED 7 ... Substrate 8 ... Translucent cover 9 ... Reflection part formation member 10 ... Coating layer 11 ... Flame retardant materials

Claims (12)

At least one highly directional point light source, a substrate to which the point light source is attached, a cylindrical frame, a bottom surface reflection portion, a side surface reflection portion, and a photoconductive reflection plate disposed in the frame, In a vehicle lamp for a vehicle comprising: a translucent cover attached to the front surface of the light conducting reflection plate;
The surface of the bottom reflecting portion that faces the light conducting reflector, the inner surface of the side reflecting portion, and the surface of the light conducting reflector that faces the bottom reflecting portion have high light reflectivity and low light transmittance. Formed of members,
The frame has openings having the same shape as the light-conducting reflector on both sides, a locking bent portion is provided at one end of the opening, and the side reflector is disposed on the inner surface side. Has been
The light conducting reflector is formed with a plurality of apertures or grooves for a predetermined light emitting design, and is sandwiched between the locking bent portion of the frame and the side reflecting portion,
The vehicle lamp according to claim 1, wherein the side reflecting portion is held by an end portion on the other side of the frame and the bottom reflecting portion fixed to the substrate.   2. The vehicular lamp according to claim 1, wherein the bent portion for locking the frame is formed by bending an end portion of the frame inward.   The lighting device according to claim 1, wherein the bottom surface reflection portion, the light conducting reflection plate, and the side surface reflection portion are coated with a flame retardant material.   The lighting device according to claim 3, wherein the coating made of the flame retardant material is made of paraxylylene or polyethylene terephthalate.   The vehicular lamp according to claim 1, wherein a protective plate having a high light transmittance is provided between the light conducting reflection plate and the locking bent portion of the frame.   2. The vehicular lamp according to claim 1, wherein the translucent cover is provided between the light conducting reflection plate and a locking bent portion of the frame.   2. The vehicular lamp according to claim 1, wherein the side-surface reflecting portion has a semi-cut portion perpendicular to the bottom surface portion formed at equal intervals on the outer surface side.   The vehicular lamp according to claim 1, wherein the frame is provided with a fixing unit that is fixed on the substrate on a side in contact with the substrate.   9. The vehicular lamp according to claim 8, wherein the fixing means is attached to the frame so as to be parallel to the substrate, and is fixed to the substrate by soldering.   2. The vehicle according to claim 1, wherein the light conducting reflector is configured such that the light transmittance increases and the light reflectance decreases as the distance from the point light source increases. Lamps.   The vehicular lamp according to claim 1, wherein the bottom surface reflection portion, the side surface reflection portion, and the light conducting reflection plate are integrally formed.   The vehicular lamp according to claim 1, wherein the bottom surface reflection portion, the side surface reflection portion, and the light conducting reflection plate are formed of an ultrafine foamed light reflection member.

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