JP2014071978A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device in which the leakage of light through a hole penetrated on a housing is little and lighting quality is high.SOLUTION: A lighting device includes: a light source body 21; a light guide body 30 which assumes a rod shape, has one edge surface as an incident surface for making light of the light source body 21 incident, has the other edge surface as an incident opposite surface, has a part of lateral surface as an emission part extended in the length direction of the light guide body 30 and is formed of a plurality of concave reflection surfaces 29 leaving an interval from each other in the length direction of the light guide body 30; and a reflector 50 having a channel type shape cross-section composed of a wall part with which portions of the lateral surface besides the emission part of the light guide body 30 are covered. Therein, an opening of the reflector 50 includes a housing 40 as an irradiation port 41 of light emitted from the emission part, a hole 45 is penetrated on the wall part of the reflector 50 and the hole 45 is arranged so as to be located between the concave reflection surface 29 and concave reflection surface 29 of the light guide body 30, which are adjacent to each other.

Description

  The present invention relates to a lighting device using a light guide and a housing.

  In recent years, the opportunity to use LEDs (light-emitting diodes) as light sources for interior lighting of automobiles has increased. Some in-vehicle lighting devices using LEDs as light sources have been proposed to illuminate linearly by using a long (rod-shaped) light guide (Patent Documents 1 to 4).

As described in Patent Document 5, the light guide used in such an illuminating device has a V-shaped groove or the like having a concave reflecting surface that reflects and scatters incident light in another side surface direction. A plurality of light guides are arranged in a row at intervals in the length direction of the light guide, so that light is emitted from one side surface (emission surface).
In addition, as shown in FIG. 13, such an illuminating device 90 has a wall portion 94 covering the light guide 91 formed in a U-shaped cross section for fixing to a vehicle / panel and preventing light leakage. A light guide 91 is housed and fixed in a housing 92 having an irradiation port 93 opened along the length direction of the light body 91.

  By the way, the housing has a hole penetrating the wall for various purposes such as fixing the light guide and reducing the weight. For example, as shown in FIG. 13, there are cases where convex ribs (ribs) 95 for locking the light guide 91 are formed on the inner surface of the wall portion 94 of the housing 92. In such a case, the rib 95 is undercut, and a punching hole 96 for punching the housing 92 is provided through the wall portion 94 of the housing 92.

JP 2009-269492 A JP 2011-240811 A Japanese Patent No. 4353142 Japanese Patent No. 4448744 Japanese Patent No. 4463246

However, if the concave reflecting surface of the concave portion 97 such as a V-shaped groove formed in the light guide 91 and the punched hole 96 formed in the housing 92 overlap, as shown in FIG. The light i1 that has passed through the concave reflecting surface of the light exits (leaks) directly out of the housing 92 from the through hole 96, resulting in a deterioration in illumination quality (particularly, light loss).
Further, when the lighting device 90 is used for interior lighting, dust or the like enters through the punched hole 96 and accumulates in the concave portion 97 of the concave reflecting surface due to long-term use. As a result, the reflectance of the concave reflecting surface is reduced, which may cause a reduction in illumination quality (particularly, light loss).
In addition, near the both ends of the irradiation port in the length direction, the amount of light is increased due to the reflected light in the housing and the like, resulting in uneven illumination. For example, in the vicinity of the end of the irradiation port 93 on the light source body 99 side, as shown in FIG. 15, the amount of light is increased by the light i3 from the portion of the light guide 91 located on the light source body 99 side from the irradiation port 93. In the vicinity of the end of the irradiation port 93 opposite to the light source body 99, the light i5 from the end face 98 of the light guide 91 is reflected by the housing 92 as shown in FIG.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an illuminating device having a high illumination quality with less light leakage from a hole penetrating the housing.

  In order to solve the above problems, an illumination device of the present invention has a light source body and a rod shape, one end surface is an incident surface on which light from the light source body is incident, the other end surface is an incident facing surface, The part is an emission part extending in the length direction of the light guide, and a concave reflection surface that reflects a part of the light reflected from the inside of the light guide toward the emission part on the side part other than the emission part, A plurality of light guides made of transparent resin and spaced apart from each other in the length direction of the light guide, and a U-shaped cross-section made up of a wall portion covering a side portion other than the light emitting part of the light guide Including a reflector made of resin, and the opening of the reflector includes a housing serving as an irradiation port for light emitted from the emitting portion, and a hole is provided in the wall portion of the reflector, and the hole is a concave reflection adjacent to the light guide. It is arrange | positioned so that it may be located between a surface and a concave reflective surface.

  The aspect of each element in the present invention is exemplified below.

[housing]
The housing is not particularly limited, but when the end of the light guide on the incident surface side protrudes from the portion of the housing where the irradiation port is open, the portion of the light guide located on the incident surface side from the irradiation port It is preferable that an incident surface side light shielding wall that shields light emitted from the light source and directed toward the irradiation port is formed on the incident surface side of the light guide from the irradiation port. This can block the light emitted from the part of the light guide located on the incident surface side from the irradiation port and directed to the irradiation port, thereby suppressing an increase in the amount of light near the incident surface side end of the irradiation port. This is because the uneven illumination can be reduced.

  In addition, the reflector has an incident facing surface-side light shielding wall that shields light that is emitted from the incident facing surface of the light guide and reflected by the reflector and directed toward the irradiation port, at the end of the reflector on the incident facing surface side. Is preferred. By blocking the light emitted from the incident facing surface and reflected by the reflector and directed to the irradiation port, it is possible to suppress an increase in the amount of light near the end of the irradiation port on the incident facing surface side, thereby reducing illumination unevenness. Because it can.

  The mode of the hole penetrating the wall is not particularly limited, but when the locking projection for locking the light guide housed in the reflector is formed on the inner surface of the wall, the resin molding of the reflector Fixing means such as a punching hole for allowing the die to be punched even when the locking projection becomes undercut sometimes, a punching hole for reducing the weight of the reflector to reduce its weight, and a screw for fixing the reflector are inserted. Examples thereof include a screw hole for fitting, a fitting hole for fitting or fixing the object to be engaged with the housing, and the like.

[Light guide]
The form of the light guide is not particularly limited, and examples thereof include a square bar shape, a round bar shape, a triangular bar shape, and a trapezoidal bar shape.

  Although the aspect of the concave reflecting surface is not particularly limited, the inner surface of the groove-shaped concave portion extending in the direction orthogonal to the length direction of the light guide, or the cone shape or the frustum shape formed toward the inside of the light guide For example, the inner surface of a recess, etc.

  Although the light guide is not particularly limited, it is preferable that a light scattering portion that scatters light reflected by the reflector and directed toward the incident facing surface is formed on the incident facing surface. This is because the light reflected by the reflector and re-entered (returns) to the incident facing surface is scattered, and an abrupt illuminance difference such as a bright line can be suppressed to reduce illumination unevenness as a whole.

  Further, when the incident surface side light shielding wall is formed in the housing, the light guide has a range of at least 2 mm from the boundary between the incident surface side light shielding wall and the irradiation port to the irradiation port in the emission part. It is preferable that the light scattering portion is provided in a range that does not exceed 10 mm at the longest. This is because the light-dark boundary generated on the light-receiving surface illuminated by the illumination device can be removed by scattering the light from the emission part in this range. In addition, if the length from the boundary between the incident surface side light shielding wall and the irradiation port is less than 2 mm, the effect of blurring the light / dark boundary generated on the light receiving surface becomes weak, and if this length exceeds 10 mm, the light is scattered. This is because there is a risk that the lighting quality will be reduced.

  Further, in the case where the incident facing surface side light shielding wall is formed in the housing, the light guide is at least 2 mm from the boundary between the incident facing surface side light shielding wall and the irradiation port in the emitting portion toward the irradiation port. It is preferable that the light scattering portion is provided in a range including the range and not exceeding 10 mm at the longest. This is because the light-dark boundary generated on the light-receiving surface illuminated by the illumination device can be removed by scattering the light from the emission part in this range. In addition, if the length from the boundary between the incident facing surface side light-shielding wall and the irradiation port is less than 2 mm, the effect of making the light and dark boundary generated on the light receiving surface weakens, and if this length exceeds 10 mm, light is scattered. This is because the range becomes large and the illumination quality may be deteriorated.

  Although the aspect which provides a light-scattering part is not specifically limited, Formation of roughening shape (for example, embossed shape etc.), sticking of a light-scattering film, etc. can be illustrated.

  In addition, the light guide is formed with an incident surface inclined at 3 to 7 ° with respect to a plane orthogonal to the optical axis of the light source so that light from the light source is refracted in the direction of the emitting portion at the incident surface. It is preferable. This is because the light from the light source body is refracted in the direction of the emission part, so that the light from the incident facing surface is reduced and the amount of light near the end of the irradiation opening on the incident facing surface side can be suppressed. This is because unevenness can be reduced and efficient irradiation can be performed. If this angle is less than 3 °, the angle at which the light from the light source body is bent at the incident surface is small, so that the light from the incident facing surface cannot be reduced much. On the other hand, when the angle exceeds 7 °, the angle at which the light from the light source body is bent at the incident surface is large, so that the emission part becomes dark overall.

  Moreover, it is preferable that the periphery of the incident surface of the light guide is chamfered. This is because the size of the incident surface can be adjusted by chamfering, and the amount of light incident on the light guide can be controlled. For example, when the same light source is used for light guides with different lengths, the brightness of both light guides can be easily controlled by adjusting the size of the incident surface by chamfering (for example, the same brightness) Yes) Therefore, by sharing a light source and changing only the light guide, it becomes possible to obtain a desired illumination mode, and cost reduction can be achieved by sharing parts.

  In addition, when the concave reflecting surface is the inner surface of the groove-shaped recess extending in the direction orthogonal to the length direction of the light guide, the light guide is formed on the incident facing surface side on the side where the concave reflecting surface is formed. It is preferable to have a concave portion for preventing the light guide body from being viewed in the end portion and assembled in the wrong direction. This is because the concave portion is provided in a place where the optical influence is small, the direction of the light guide can be visually recognized without deteriorating the illumination quality, and the direction of the light guide can be visually confirmed. This is because it is possible to prevent assembly by mistake.

[Light source]
Although it does not specifically limit as a light source of a light source body, LED (light emitting diode), EL (electroluminescence), LD (laser diode), an incandescent bulb, a halogen bulb, a fluorescent lamp, a discharge lamp etc. can be illustrated, and it is lightweight and compact. Thus, an LED is preferable because it has directivity in the irradiation direction and has a long lifetime.

[Lighting device]
The lighting device is used for indoor lighting or outdoor lighting of a vehicle, and indoor or outdoor lighting of a house.

  ADVANTAGE OF THE INVENTION According to this invention, there is little leakage of the light from the hole penetrated by the housing, and an illuminating device with high illumination quality can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view of the instrument panel incorporating the illuminating device of Example 1 of this invention. The illumination device is shown, (a) is a perspective view seen from the irradiation port side, (b) is a perspective view seen from the attachment piece side. It is the figure which looked at the same illuminating device from the direction facing a radiation opening. The main part of the illuminating device is shown enlarged, (a) is a view near the end opposite to the light source body, (b) is a view near the punch hole, (c) is a view near the light source body, (d) Is an AA cross-sectional view near the end opposite to the light source body, (e) is a BB end view near the punched hole, and (f) is a CC end view near the light source. In addition, (d), (e), (f) is the figure rotated about 45 degrees. The main part of the illuminating device is shown enlarged, (a) is a DD end view near the end opposite to the light source body, (b) is an EE end view near the punch hole, and (c) is a light source. It is an FF end elevation near the body. It is a perspective view of the light guide of the illuminating device. It is a figure which shows reflection and permeation | transmission of the light in the concave reflective surface of the illumination device vicinity of the punch hole. It is a figure which shows the entrance and exit of the light in the vicinity of the entrance plane of the light guide of the illumination device. It is a figure which shows emission of the light in the vicinity of the incident opposing surface of the light guide of the illuminating device. FIG. 2 shows a lighting device according to a second embodiment of the present invention, where (a) is a perspective view of the vicinity of the incident facing surface of the light guide of the lighting device, and (b) is a cross section of the lighting device near the incident facing surface of the light guide. FIG. 4C is an end view of the vicinity of the punched hole of the lighting device, and FIG. 4D is an end view of the vicinity of the punched hole of the lighting device with the wall shape changed. It is a figure which shows the light guide from which length differs. (A) is an end view of the reflector through which the screw hole is penetrated, and (b) is an end view of the reflector through which the insertion hole is penetrated. A conventional illumination device is shown, (a) is a view seen from the direction facing the irradiation port, (b) is an enlarged view of the vicinity of the punched hole, (c) is a view of the vicinity of the punched hole orthogonal to the length direction of the illumination device. It is the end elevation cut in the direction to do. It is a figure which shows permeation | transmission of the light in the concave reflective surface of the illumination device vicinity of the punch hole. It is a figure which shows light emission in the edge vicinity by the side of the light source of the light guide of the same illuminating device. It is a figure which shows the radiation | emission of light in the vicinity of the edge on the opposite side to the light source body of the light guide of the same illuminating device.

  A preferred embodiment of the illuminating device of the present invention has a light source body, a rectangular bar shape, one end surface is an incident surface on which light from the light source body is incident, the other end surface is an incident facing surface, and one side surface is an exit surface. One side surface facing the emission surface is a counter reflection surface, and the remaining two side surfaces are side reflection surfaces. A part of the light reflected from the inside of the light guide is directed to the output surface. A plurality of concave reflecting surfaces that are reflected in the longitudinal direction of the light guide are formed with a plurality of light guides made of transparent resin, an opposing wall that covers the opposing reflecting surfaces, and two lateral reflecting surfaces. It includes a reflector made of a resin having a U-shaped cross section formed from a covering horizontal wall portion, and a locking protrusion for locking the light guide housed in the reflector is formed on the inner surface of the horizontal wall portion, and the opening of the reflector Includes a housing that serves as an irradiation port for light exiting from the exit surface, The horizontal wall has a through hole that allows the die to be punched even if the locking projection becomes undercut during resin molding of the reflector, and the through hole has a concave shape with the concave reflecting surface adjacent to the light guide. It is arranged to be located between the reflecting surfaces.

  The illuminating device 20 of Example 1 of this invention is integrated and used for the instrument panel 10 of a motor vehicle, as shown in FIG. Specifically, it is attached above the step portion 12 formed above the glove box 11 located in front of the passenger seat (not shown) and illuminates the lower portion of the step portion 12. Moreover, when the glove box 11 is opened, it functions also as illumination which illuminates the inside of the glove box 11.

  2-9, the illuminating device 20 has the light source 21 in which LED22 was incorporated as a light source, the light guide 30 in which the light from the light source 21 was incident, and radiate | emitted from the output surface 31, and light guide. And a housing 40 having a reflector 50 covering the body 30.

  The light source body 21 is provided with an LED 22 inside a substantially rectangular parallelepiped casing 23 made of resin, and an opening is provided in the wall surface of the casing 23 facing the light emitting surface of the LED 22. A mounting wall 25 that supports one end of the light guide 30 is provided so as to protrude outward.

  The light guide 30 has a substantially square bar shape made of substantially colorless and transparent PMMA. In the light guide 30, one end surface on the light source body 21 side is an incident surface 37 on which the light of the LED 22 is incident, and the other end surface on the opposite side is an incident facing surface 39. Of the four side surfaces of the light guide 30, one side surface is the emission surface 31, one side surface facing the emission surface 31 is the counter reflection surface 32, and the remaining two side surfaces are the lateral reflection surfaces 28.

  The incident surface 37 is positioned closer to the light source body 21 than the end of the reflector 50 (the portion of the housing 40 where the irradiation port 41 described later is opened), and the end on the exit surface 31 side is closer to the LED 22 side. The light from the LED 22 is refracted by the incident surface 37 in the direction of the exit surface 31. Further, chamfering 37b is applied to the end of the incident surface 37 on the exit surface 31 side and the end of the opposing reflecting surface 32 side.

  The light guide 30 is assembled so that the direction of the light guide 30 can be visually recognized and cut in the wrong direction so that the opposite reflecting surface 32 side of the end portion on the incident facing surface 39 side is cut out so as not to have an optical influence. It has a step 38 for preventing it. On the incident facing surface 39 and the surface 38 a of the stepped portion 38, a textured shape is formed. This embossed shape scatters the light reflected by the reflector 50 and directed toward the incident facing surface 39 or the surface 38a of the stepped portion 38. In the drawing, the textured shape of the plain is indicated by broken cross hatching.

  The exit surface 31 extends from the boundary between the incident surface side light shielding wall 48 and the irradiation port 41 described later to 10 mm toward the irradiation port 41 and from the boundary between the incident facing surface side light shielding wall 49 and the irradiation port 41 described later. A textured shape 34 is formed in a range up to 10 mm toward the irradiation port 41, and light from this range is scattered.

  A plurality of (40) groove-like recesses 33 or light guides 30 are formed on the opposing reflection surface 32 at substantially equal intervals in the length direction. The groove-shaped recess 33 is substantially V-shaped and becomes narrower toward the center of the light guide 30, and extends in a direction orthogonal to the length direction of the light guide 30. A surface that is substantially V-shaped and extends in a direction orthogonal to the length direction of the light guide 30 is a concave reflecting surface 29. The concave reflecting surface 29 has a textured shape (texture depth: 2 to 10 μm) in order to diffuse light at the concave reflecting surface 29.

  In the light guide 30, a pair of fitting ribs 35 and a pair of fitting claws 36 for fixing the light source body 21 to the light guide 30 are disposed opposite to each other on the incident surface 37 side end. The pair of fitting ribs 35 project from the lateral reflecting surface 28, and the end on the incident surface 37 side is in contact with the tip of the mounting wall 25. The pair of fitting claws 36 protrude from the emission surface 31 and the opposing reflection surface 32 and engage with the mounting wall 25. Further, the fitting claw 36 projecting from the emission surface 31 is more than the fitting claw 36 projecting from the opposing reflecting surface 32 so that the light guide 30 can be oriented when inserted into the mounting wall 25. It is close to the incident surface 37 side.

  The housing 40 is molded from resin. A reflector 50 that covers the light guide 30 and a light source housing 46 that houses the light source body 21 and covers the end of the light guide 30 on the incident surface 37 side are provided.

  The reflector 50 includes an opposing wall portion 44c that covers the opposing reflecting surface 32 and a lateral wall portion 44d that covers the two lateral reflecting surfaces 28, and has a U-shaped cross-section with an opening on the exit surface 31 side. The opening on the emission surface 31 side is an irradiation port 41 through which light emitted from the emission surface 31 passes and illuminates the irradiation surface.

  An attachment piece 47 for attaching the lighting device 20 to the instrument panel 10 is formed on the outer surface of the reflector 50.

  A plurality of (four) locking protrusions 43 for locking the light guide 30 accommodated in the reflector 50 project from the inner surface of the horizontal wall portion 44d. The side wall 44d and the opposite wall 44c on the side of the opposing wall 44c from the locking projection 43 are provided with a punching hole 45 for punching the housing 40 which is undercut by providing the locking projection 43. It is installed. The locking projection 43 is disposed so as to be positioned between the adjacent concave reflection surfaces 29 so that the punched holes 45 do not overlap the concave reflection surface 29 of the light guide 30.

  An incident surface side light shielding wall 48 extending in the direction of the exit surface 31 is provided on the light shielding body 51 that is a part of the light source housing 46 and extends to the end of the irradiation port 41 on the incident surface 37 side. The light-shielding body 51 shields outgoing light emitted at a right angle from the portion of the emission surface 31 located on the incident surface 37 side from the irradiation port 41. The incident surface side light shielding wall 48 shields light emitted from the portion of the light guide 30 located on the incident surface 37 side from the irradiation port 41 and directed toward the irradiation port 41. Further, an incident facing surface side light shielding wall 49 that covers the end portion on the incident facing surface 39 side of the light guide 30 and extends in the direction of the exit surface 31 is provided on the wall portion 44f at the end facing the incident facing surface 39. . The incident facing surface side light-shielding wall 49 shields light emitted from the incident facing surface 39 and reflected by the reflector 50 toward the irradiation port 41. In addition, a protrusion 27 that abuts on the stepped portion 38 of the light guide 30 is provided on the inner surface near the end on the incident facing surface 39 side of the facing wall portion 44c.

According to the illuminating device 20 of Example 1 of this invention, the effect shown next is acquired.
As shown in FIG. 7, the concave hole 45 is disposed so as to be positioned between the adjacent concave reflective surface 29 so that the concave hole 45 does not overlap the concave reflective surface 29. The light i1 that has passed through the reflecting surface 29 is shielded by the wall portion 44 and does not go directly out of the housing 40 through the through hole 45, so that light loss is reduced and the illumination quality can be improved.
As shown in FIG. 7, the locking projection 43 is disposed so as to be positioned between the adjacent concave reflection surface 29 and the concave reflection surface 29 so that the locking projection 43 does not overlap the concave reflection surface 29. Since the light i <b> 2 reflected by the concave reflecting surface 29 is not shielded by the locking projection 43, efficient irradiation can be performed.

Since the incident surface side light shielding wall 48 is provided in the housing 40, as shown in FIG. 8, the light is emitted from the portion of the light guide 30 (particularly, the fitting rib 35) located on the incident surface 37 side from the irradiation port 41. The light i3 directed to the irradiation port 41 and the light leaking from the light source body 21 can be shielded, and an increase in the amount of light near the end on the incident surface 37 side of the irradiation port 41 is suppressed, thereby illuminating. Unevenness can be reduced.
By providing the incident facing surface side light-shielding wall 49 in the housing 40, as shown in FIG. 9, the light i6 emitted from the incident facing surface 39 and the like of the light guide 30 and reflected by the housing 40 toward the irradiation port 41 Can be shielded, and it is possible to suppress an increase in the amount of light in the vicinity of the end of the irradiation port 41 on the incident facing surface 39 side, thereby reducing illumination unevenness.

The light that is reflected by the reflector and directed toward the incident facing surface 39 and the like as shown in FIG. 9 due to the formation of a plain textured shape on the incident facing surface 39 of the light guide 30 and the surface 38a of the stepped portion 38 The light i5 emitted from the incident facing surface 39 or the like of the light guide 30 can be scattered, and the light / dark boundary generated on the light receiving surface can be removed.
The incident surface 37 of the light guide 30 is formed so as to be inclined by 5 ° with respect to the surface orthogonal to the optical axis of the LED 22 so that the end on the exit surface 31 side approaches the LED 22 side. As shown in FIG. 4, the light i from the LED 22 can be refracted in the direction of the exit surface 31 by the incident surface 37, the light from the incident facing surface 39 of the light guide 30 can be reduced, and the incident facing surface of the irradiation port 41 can be reduced. It is possible to suppress an increase in the amount of light near the end on the 39 side, to reduce uneven illumination, and to perform efficient irradiation.

The range from the boundary between the incident surface side light shielding wall 48 and the irradiation port 41 to 10 mm toward the irradiation port 41, and from the boundary between the incident facing surface side light shielding wall 49 and the irradiation port 41 to 10 mm toward the irradiation port 41. As shown in FIGS. 8 and 9, light i4 from this range can be scattered as shown in FIGS. The border of light and darkness that occurs on the surface can be removed.

-Since the chamfer 37b is applied to the end of the incident surface 37 on the exit surface 31 side and the end on the opposite reflecting surface 32 side, the size of the incident surface 37 can be changed by adjusting the chamfer 37b. The amount of light incident on can be controlled.

The light guide 30 has directionality without reducing the illumination quality by notching the stepped portion 38 on the side of the opposing reflection surface 32 at the end of the light guide 30 on the incident facing surface 39 side, Since the direction of the light guide 30 can be visually recognized, it is possible to prevent the light guide 30 from being assembled in the wrong direction. Further, since the width of the stepped portion 38 is the same as that of the concave reflecting surface 29, the orientation on each surface becomes similar, and the illumination quality at the end on the opposing reflecting surface 32 side is improved.

  The illumination device 60 of Example 2 of the present invention is different from the illumination device 20 of Example 1 in that a round bar-shaped light guide 61 is used, as shown in FIG. It is. In FIG. 10, the same parts as those of the lighting device 20 are denoted by the same reference numerals.

  The light guide 61 is housed in the reflector 50 with the side surface portion (opposing reflection surface) 32 on which the concave reflecting surface 29 is formed (the groove-like concave portion 33 is provided) facing the opposing wall portion 44c. The emission surface 31 faces the irradiation port 41. Moreover, it has the step part 38 which notched so that the opposing reflective surface 32 side of the edge part by the side of the incident opposing surface 39 side might not give an optical influence. On the incident facing surface 39 and the surface 38 a of the stepped portion 38, a textured shape is formed. In the drawing, the textured shape of the plain is indicated by broken cross hatching.

  According to the illuminating device 60 of Example 2 of this invention, the same effect as the effect obtained with the illuminating device 20 of Example 1 can be acquired.

In addition, this invention is not limited to the said Example, In the range which does not deviate from the meaning of invention, it can also be suitably changed and embodied as follows.
(1) As shown in FIG. 11, when using light guides 30 having different lengths, the size of the incident surface 37 is adjusted by a chamfer 37b applied to the incident surface 37, and the light is incident from the LED. The amount of light to be changed is changed according to the length of the light guide 30 so that a common light source is used.

(2) As shown in FIG. 12A, a screw hole 72 for inserting a screw 71 for fixing the reflector 50 is provided in the opposing wall portion 44c. Further, as shown in FIG. 12B, an insertion hole 77 for inserting and fixing the object to be engaged 76 into the reflector 50 is provided through the opposing wall portion 44c.

DESCRIPTION OF SYMBOLS 20 Illuminating device 21 Light source body 28 Lateral reflecting surface 29 Concave reflecting surface 30 Light guide 31 Outgoing surface 32 Opposing reflecting surface 33 Groove-shaped recessed part 34 Wrinkle shape 37 Incident surface 37b Chamfering 38 Step part 39 Incident opposing surface 40 Housing 41 Irradiation port 43 Locking projection 44 Wall portion 44c Opposing wall portion 44d Horizontal wall portion 45 Punch hole 48 Incident surface side light shielding wall 49 Incident facing surface side light shielding wall 50 Reflector 60 Illuminating device 61 Light guide

Claims (8)

A light source (21);
It has a rod shape, and one end surface is an incident surface (37) on which light from the light source body (21) is incident, the other end surface is an incident facing surface (39), and a part of the side surface is a light guide (30, 61). A part of the light reflected from the inside of the light guide (30, 61) is provided on the side of the side other than the emission part (31) to the emission part (31). A plurality of concave reflecting surfaces (29) reflecting toward the light guide (30, 61) in the length direction of the light guide (30, 61), and a light guide (30, 61) made of transparent resin;
The reflector (50) includes a reflector (50) made of resin having a U-shaped cross section including a wall portion (44) that covers a portion of the side surface other than the emission portion (31) of the light guide (30, 61). Comprises a housing (40) which is an irradiation port (41) for light emitted from the emission part (31),
Holes (45, 72, 77) are formed through the wall (44) of the reflector (50), and the holes (45, 72, 77) are adjacent to the concave reflecting surface (29) of the light guide (30, 61). ) And the concave reflecting surface (29). In the light guide (30, 61), the end on the incident surface (37) side protrudes from the portion of the housing (40) where the irradiation port (41) is open,
The housing (40) shields light emitted from a portion of the light guide (30, 61) located on the incident surface (37) side from the irradiation port (41) and blocks light directed toward the irradiation port (41). The lighting device according to claim 1, wherein the wall (48) is formed on the incident surface (37) side of the light guide (30, 61) from the irradiation port (41).   Light in the emission part (31) includes a range of at least 2 mm from the boundary between the incident-side light shielding wall (48) and the irradiation port (41) toward the irradiation port (41) and does not exceed 10 mm at the longest. The lighting device according to claim 2, wherein the scattering portion is provided.   The reflector (50) is a light-shielding wall on the light-incident facing surface side that shields light that is emitted from the light-incident facing surface (39) of the light guide (30, 61), reflected by the reflector (50), and directed toward the irradiation port (41). 49) The illumination device according to any one of claims 1 to 3, wherein 49) is formed at an end of the reflector (50) on the incident facing surface (39) side.   The light guide (30, 61) is formed with a light scattering portion on the incident facing surface (39) for scattering light reflected by the reflector (50) toward the incident facing surface (39). The lighting device according to any one of the above.   The light guide (30, 61) has an incident surface (37) whose optical surface is the optical axis of the light source (21) so that the light from the light source (21) is refracted in the direction of the emitting portion (31) at the incident surface (37). The illumination device according to any one of claims 1 to 5, wherein the illumination device is formed so as to be inclined by 3 to 7 degrees with respect to a plane orthogonal to.   The illumination device according to any one of claims 1 to 6, wherein the light guide (30, 61) is chamfered (37b) around the incident surface (37). The concave reflection surface (29) is an inner surface of the groove-shaped recess (33) extending in a direction orthogonal to the length direction of the light guide (30, 61),
The direction of the light guide (30, 61) can be visually recognized at the end of the incident facing surface (39) on the side where the concave reflecting surface (29) is formed. The illuminating device according to any one of claims 1 to 7, further comprising a recess (38) for preventing wrong assembly.

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