JP2005258077A - Illumination plate for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination plate for vehicle capable of realizing the high brightness and the thinning. <P>SOLUTION: The illumination plate for vehicle is constituted so that a light guide 5 is arranged in a housing 1 of a hollow box shape and a light diffusive reflection part 22 having the same shape as a design illuminated by a cover lens 4 is formed on the backside 5a of the light guide 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicular illumination plate attached to a part of a vehicle body.

    In a car body (including its accessories), an illumination plate may be incorporated on the surface of the car body, such as a scuff plate attached to a side step part. This type of lighting plate becomes interior by emitting light as a whole, and when a specific display (characters, marks, etc.) is given, the display is lit to make it stand out.

The illumination plate uses a light guide made of transparent glass or transparent resin in order to uniformly emit light on the surface. A light source is provided on one side of the light guide. The light source has a general structure in which a light emitting portion is provided on a substrate including circuit components and a pair of wirings are taken out from the lower portion of the substrate. Light from this light source is introduced into the light guide from one side of the light guide. A reflection layer is formed on the back surface of the light guide, and the light introduced into the light guide is diffused while being reflected by the reflection layer, so that the surface of the illumination plate can emit light uniformly (for example, Patent Document 1). reference).
JP 2001-163117 A

  However, in such a conventional illumination plate, since the light guide has a general structure in which the light emitting unit and the wiring are combined with the substrate as the light source, the entire surface of the light guide emits light. In addition to the ineffective portion, the vertical dimension of the light source itself is large, and there is a certain limit to reducing the thickness of the light guide. Therefore, when the illumination plate is attached to the vehicle body, the illumination plate may protrude from the vehicle body, and a sense of unity with the vehicle body is not felt, which is disadvantageous in appearance.

  The present invention has been made paying attention to such a conventional technique, and provides an illumination plate for a vehicle that has high luminance and can be thinned.

  The invention according to claim 1 is a housing comprising a base having side walls on four sides and a cover lens attached to the tip of the side wall of the base, a light source disposed on the side wall of the housing, An illumination plate for a vehicle comprising a light guide facing a light source and housed in the housing and diffusing light from the light source into the housing to shine the cover lens, the rear surface of the light guide Is characterized in that a light diffusing reflection part having the same shape as the design of the cover lens emitting light is formed.

  According to a second aspect of the present invention, there is provided a housing including a base having side walls on four sides and a cover lens attached to a tip of the side wall of the base, a light source disposed on the side wall of the housing, An illumination plate for a vehicle comprising a light guide facing a light source and housed in a housing and diffusing light from the light source into the housing to shine a cover lens, the surface of the light guide Is characterized in that a light diffusing and transmitting part having the same shape as the design of the cover lens emitting light is formed.

  A third aspect of the present invention is the vehicle illumination plate according to the first or second aspect, wherein the cover lens has a specific indication (characters / marks, etc.) by mask painting, silk printing, film, or the like. It is characterized by the illumination that is shielded from light other than the part.

  A fourth aspect of the present invention is the vehicle illumination plate according to the first or second aspect, wherein the cover lens has a specific indication (character, mark, etc.) by mask painting, silk printing, film, or the like. ) Part is a light-shielded illumination.

  According to the first aspect of the present invention, the back surface of the light guide is formed with a light diffusing and reflecting portion having the same shape as the design emitted by the cover lens. Since it can be reflected from the light diffusive reflecting part and emitted from the cover lens with almost no light, the luminous flux utilization efficiency is high and the luminance is high, and the invalid part cannot be formed.

  According to the second aspect of the present invention, the surface of the light guide is formed with a light diffusing and transmitting part having the same shape as the design of the cover lens that emits light. Since light can be emitted from the cover lens at the light diffusing and transmitting portion with almost no light, the luminous flux utilization efficiency is high, the luminance is high, and the ineffective portion cannot be formed.

  According to the invention described in claim 3, in addition to the effect described in claim 1 or 2, the cover lens has a portion other than the display (characters / marks, etc.) portion by mask coating, silk printing, film, or the like. By using light-shielded illumination, the contrast of the light emission of the design shape of the light guide can be increased and the appearance and appearance can be set freely.

  According to the invention described in claim 4, in addition to the effect described in claim 1 or 2, the cover lens shields the display (characters / marks, etc.) portion by mask coating, silk printing, film, or the like. By adopting such illumination, it is possible to increase the light emission contrast of the design shape of the light guide and to set the appearance and appearance freely.

  Realized by forming a light diffusive reflection part with the same shape as the design emitted by the cover lens on the back of the light guide to provide a vehicle illumination plate that can be made bright and thin. did.

  A first embodiment of the present invention will be described below with reference to FIGS. Reference numeral S denotes a scuff plate (illumination plate) attached to a known side step portion of an automobile. The scuff plate S includes a housing 1 and a light source 2.

  The housing 1 has a rectangular hollow box shape including a base 3, a cover lens 4, and a light guide 5. Since the housing 1 has a hollow box shape, it is very lightweight.

  The base 3 is made of a white synthetic resin, has excellent light reflectivity, and has an open top container shape having side walls 3a and 3b on four sides. The reason why the base 3 is made of white synthetic resin is to obtain a high reflectance. The inner surface of the base 3 is also subjected to fine uneven textured processing to promote diffuse reflection. Note that the base 3 may be formed by white coating on the surface of a synthetic resin of another color instead of making the synthetic resin itself white, or may be formed of a honing-like metal-based light selective surface or the like.

  The cover lens 4 is made of a transparent synthetic resin and is attached so as to cover all the openings defined by the tips of the side walls 3a and 3b of the base 3. A display unit (characters) 6 is provided on the surface of the cover lens 4, and the region of the display unit 6 is subjected to diffusion transmission processing. Therefore, since the display unit 6 has a larger diffusion rate than other regions, the display unit 6 can be clearly seen. It should be noted that a region other than the display unit 6 is subjected to a light shielding process using a mask coating, silk printing, a film, or the like as an illumination that shields the display (characters / marks, etc.).

  The light guide 5 opposes the light source 2 and is housed in the housing 1 and diffuses the light L from the light source 2 into the housing 1 to illuminate the cover lens 4. On the back surface 5 a of the light guide 5, a light diffusive reflecting portion 22 having the same shape as the design (for example, ICHIKOH) that the cover lens 4 emits light is formed. The light guide 5 is formed by cutting a transparent synthetic resin.

  The light source 2 is a board-less structure composed of a light emitting unit 7 made of LEDs and housed at the end in the longitudinal direction on the bottom surface of the base 3, and a pair of wirings 8. Each of the registers 10 is provided in the middle of the wiring 8.

  The light emitting unit 7 is fixed by a pair of protrusions 11 and 11 formed on the bottom surface of the base 3. The protrusions 11 and 11 are formed with convex portions 11a and 11a that sandwich the side surface of the light emitting portion 7 and prevent the light emitting portion 7 from coming off to the tip side. As described above, the light source 2 has a substrate-less structure including the light emitting portion 7 and the wiring 8, and the light emitting portion 7 is directly fixed by the protruding portions 11 and 11 formed on the base 3, so that the base 3 and the cover lens are fixed. The distance between the housing 4 and the light-emitting portion 7 is substantially the same as that of the light-emitting portion 7, and the housing 1 having a very thin structure can be obtained.

  Further, tapered reflectors 12 and 12 opened in the light L irradiation direction extend from the end portions of the projections 11 and 11 to the side walls 3a and 3a. The surfaces of the reflectors 12 and 12 are also subjected to the same surface treatment as the surface of the base 3.

  A plurality of partition walls 13, 14 and 15 are formed on the bottom surface of the base 3 on the bottom side of the light emitting unit 7. The partition walls 13, 14, 15 and the side walls 3a, 3b form a passage 16 bent in a U shape in a direction away from each other, and the wiring 8 is accommodated therein.

  The partition wall 13 supports the bottom of the light emitting unit 7 and is interposed between the bases of the pair of wirings 8 and 8 to ensure an insulation state between the wirings 8 and 8. A portion for accommodating circuit components (diode 9 and resistor 10) in the passage 16 is formed between the long partition wall 14 to which the partition wall 13 is applied at a right angle and the pair of short partition walls 15. Further, a portion of the passage 16 is formed between the long partition wall 14 and the side walls 3a and 3b on the long side and the short side. Since the passage 16 for storing the wirings 8 and 8 is bent in a U shape in a direction away from each other, the insulation state of the wirings 8 and 8 can be reliably maintained.

  The wirings 8 and 8 are guided to the outside through a rubber cap 18 fitted in the outlet 17. The wirings 8 and 8 are covered with a covering portion 19 outside the side wall 3 b of the base 3 and in the passage 16 near the outlet 17. In the passage 16 close to the outlet 17, a plurality of ribs 20, 21 projecting from the partition wall 14 side and the side wall 3 b side to the passage 16 side are formed, and the tips of the ribs 20, 21 are covered with the wiring 8. The pressure contact with the portion 19 prevents the wiring 8 from coming off from the outlet 17. The fact that the entire passage 16 is bent in a U shape is also effective in preventing the wires 8 and 8 from coming off.

  Like the side wall 3b of the base 3, the long partition wall 14 has a height substantially corresponding to the vertical dimension of the light-emitting portion 7, and the upper end of the partition wall 14 is also covered with the cover lens 4 attached to the tips of the side walls 3a and 3b. It abuts on the back surface of the lens 4. Therefore, it is possible to prevent the cover lens 4 from being deformed when the cover lens 4 is supported from the back surface side by the partition wall 14 and receives an external force from the front surface side.

  In addition, an insulating elastic body (rubber) (not shown) is placed on the base of the wires 8 and 8 in which the insulation state is secured by the partition wall 13 from above, and the cover lens 4 is attached so that the wires 8 and 8 are connected. The base is pressed down by the insulating elastic body. Therefore, the insulating elastic body prevents the wirings 8 and 8 from being lifted, and the insulating state of the wirings 8 and 8 is more reliably maintained.

  The scuff plate S configured as described above is formed with the light diffusing reflection part 22 having the same shape as the design emitted by the cover lens 4 on the back surface of the light guide 5. As shown by the arrow, the light L is hardly attenuated, and is reflected by the light diffusive reflecting part 22 and can be emitted from the cover lens 4, so that the luminous flux utilization efficiency is high, the brightness is high, and the invalid part cannot be formed.

  Further, the inner surface of the base 3 of the housing 1 is further improved in luminance by being excellent in light reflectivity by white resin, highly reflective coating, aluminum vapor deposition or the like.

  In addition, the cover lens 4 is illuminated by shading other than the display (characters / marks, etc.) portion by mask coating, silk printing, film, etc., so that the design light shape of the light guide 5 (for example, ICHIKOH) is emitted. The contrast and appearance can be set freely.

  The light guide 5 is formed by cutting a transparent synthetic resin, so that the manufacturing cost of the light guide 5 can be reduced.

  The reflectors 12 and 12 are inclined in a tapered shape with respect to the light emitting unit 7, and the reflectors 12 and 12 not only reflect the light L from the light emitting unit 7 first, but also the light that is reflected and returned. Since L can be further secondarily reflected in a direction intersecting with the direction of the light emitting unit 7, a further diffusion state of the light L can be obtained, and the cover lens 4 can emit light more uniformly.

  A second embodiment of the present invention will be described with reference to FIGS. The main difference from the first embodiment is that the light source 2 is arranged on opposite side walls 3b and 3b of the base 3 of the housing 1. The wiring 8 connected to one light source 2 is electrically connected to the other light source 2 through a connection line 8a, and tapered reflectors 12 and 12 are extended to the side walls 3a and 3a, and the side wall 3a is left as it is. 3a, second reflectors 12a and 12a are formed.

  The light source 2 arranged at an opposed position has a substrate-less structure composed of an LED and a light emitting part 7 housed at a longitudinal end of the bottom surface of the base 3 and a pair of wirings 8. Since the diode 9 and the register 10 as circuit parts are provided in the middle of the wiring 8, respectively, since they are the same as in the first embodiment, description thereof is omitted.

  Therefore, according to the second embodiment, since the light sources 2 and 2 are arranged on the opposite side walls 3b and 3b of the base 3 of the housing 1, the luminance is further increased.

  A third embodiment of the present invention will be described with reference to FIGS. The main difference from the first embodiment is that the means for emitting the light L from the cover lens 4 is different.

  On the surface 5 b of the light guide 5, a light diffusing / transmitting portion 23 having the same shape as a design (for example, ICHIKOH) that the cover lens 4 emits light is formed. The light diffusing and transmitting portion 23 is formed by white silk printing, painting, honing surface heat transfer, sandblasting, or the like. The light source 2 is a board-less structure composed of a light emitting unit 7 made of LEDs and housed at the end in the longitudinal direction on the bottom surface of the base 3, and a pair of wirings 8. The register 10 is provided in the middle of the wiring 8 in the same manner as in the first embodiment, and thus the description thereof is omitted.

  Therefore, according to the third embodiment, the surface 5b of the light guide 5 is formed with the light diffusing / transmitting portion 23 having the same shape as the design (for example, ICHIKOH) that the cover lens 4 emits light. Since light L can be emitted from the cover lens 4 by the light diffusing / transmitting portion 23 with almost no attenuation of the light L at the light guide 5, the luminous flux utilization efficiency is high, the luminance is high, and an ineffective portion cannot be formed.

  Further, since the light diffusing and transmitting portion 23 is formed by white silk printing, painting, honing surface heat transfer, sand blasting, or the like, the luminance is further increased.

  According to the present invention, the base 3 has been described as a white resin, but is not limited thereto, and may be a highly reflective coating, aluminum vapor deposition, or the like.

  The area other than the display section 6 of the cover lens 4 has been described as having been subjected to a light shielding process using mask coating, silk printing, film, etc., with the display (characters / marks, etc.) being light-shielded. It is not limited, and the area of the display unit 6 may be subjected to a light-shielding process using light-shielded illumination.

  Moreover, although LED was taken as an example as the light source 2, it is not limited to this.

1 is a partially broken plan view showing a scuff plate according to a first embodiment of the present invention. Sectional drawing of FIG. The expanded sectional view which shows the diffuse reflection part 21 of FIG. The partially broken top view which shows the scuff plate which concerns on 2nd Example of this invention. Sectional drawing of FIG. The partially broken top view which shows the scuff plate which concerns on 3rd Example of this invention. Sectional drawing of FIG. FIG. 8 is an enlarged cross-sectional view showing a diffuse transmission part 23 in FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS S Scuff plate 1 Housing 2 Light source 3 Base 3a, 3b Side wall 4 Cover lens 5 Light guide 6 Display part 7 Light emission part 22 Diffuse reflection part 23 Diffuse transmission part L Light

Claims (4)

A housing composed of a base having side walls on four sides and a cover lens attached to the tip of the side wall of the base; a light source disposed on the side wall of the housing; and opposed to the light source and inside the housing A vehicle illumination plate comprising a light guide that is housed and diffuses light from a light source into a housing to shine a cover lens,
An illumination plate for a vehicle, wherein a light diffusing reflection part having the same shape as the design of the cover lens that emits light is formed on the back surface of the light guide. A housing composed of a base having side walls on four sides and a cover lens attached to the tip of the side wall of the base; a light source disposed on the side wall of the housing; and opposed to the light source and inside the housing A vehicle illumination plate comprising a light guide that is housed and diffuses light from a light source into a housing to shine a cover lens,
An illumination plate for a vehicle, wherein a light diffusing and transmitting portion having the same shape as the design emitted by the cover lens is formed on the surface of the light guide. The vehicle illumination plate according to claim 1 or 2,
The vehicle illumination plate according to claim 1, wherein the cover lens has an illumination in which a portion other than a specific display (character / mark, etc.) is shielded by mask painting, silk printing, film, or the like. The vehicle illumination plate according to claim 1 or 2,
The vehicle illumination plate according to claim 1, wherein the cover lens has an illumination in which a specific display (characters / marks, etc.) is shielded by mask painting, silk printing, film, or the like.

Images