JP2018120708A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture capable of increasing variations of a light emission method.SOLUTION: A vehicular lighting fixture includes: a light guide lens 20 including a light guide lens body 20a extending in a predetermined direction and a rib part 24 extending in a direction crossing with respect to that; a reflection surface 31 arranged at the back of the light guide lens; and a light source for emitting light guided in a predetermined direction in the light guide lens body. The light guide lens body includes: a first reflection surface 22; an emission surface 25; and a second reflection surface 23 for internally reflecting at least one part of reflection light from the first reflection surface in such a manner that one part of the reflection light from the first reflection surface travels toward a tip part in the rib part, and another part of the reflection light from the first reflection surface emits from the emission surface. The rib part includes a front surface 24c and a rear surface 24d on the opposite side from it. The rear surface includes individual reflection surfaces 24a1, 24a2 for internally reflecting the inside of the rib part toward the front surface so that the light from the second reflection surface traveling toward the tip part in the rib part is radiated frontward.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicular lamp, and more particularly to a vehicular lamp that can increase variations in a light emitting method.

  Conventionally, a vehicular lamp has been proposed that has a first reflecting surface and a second reflecting surface that diffusely reflect light emitted from a light guide member and can realize uniform light emission (for example, Patent Document 1 (see FIG. 3)).

JP, 2006-021410, A

  However, although the vehicle lamp described in Patent Document 1 can achieve uniform light emission, there is a problem that variations in the light emission method may not be sufficiently secured.

  This invention is made | formed in view of the said situation, and it aims at providing the vehicle lamp which can increase the variation of the light emission method conventionally.

  In order to achieve the above object, one aspect of the present invention provides a light guide lens including a light guide lens main body extending in a predetermined direction, a rib portion extending in a direction intersecting the predetermined direction, and the light guide. A reflective surface disposed behind the optical lens; and a light source that emits light guided in the predetermined direction through the light guide lens body, the light guide lens body being within the light guide lens body. A first reflecting surface that internally reflects at least a part of the light from the light source that is guided, a light exiting surface, and a part of the reflected light from the first reflecting surface is directed toward the tip portion in the rib portion. And second reflection that internally reflects at least part of the reflected light from the first reflecting surface so that another part of the reflected light from the first reflecting surface exits from the light emitting surface. And the rib portion includes a front surface and a rear surface opposite to the front surface. The rear surface of the rib portion is formed in the rib portion so that the light from the second reflecting surface that travels toward the tip portion in the rib portion is emitted from the front surface and irradiated forward. Including at least one individual reflecting surface that internally reflects light from the second reflecting surface traveling toward the front surface, and the surface shape of the light emitting surface of the light guide lens body emits light from the light emitting surface. The light from the second reflecting surface is configured to be incident on the reflecting surface, and the surface shape of the reflecting surface is such that the light from the light exit surface of the light guide lens body incident on the reflecting surface is forward. It is the vehicle lamp comprised so that it may reflect toward, It is characterized by the above-mentioned.

  According to this aspect, it is possible to provide a vehicular lamp that can increase variations in the light-emitting method as compared with the related art. In addition, the lighting feeling can be improved.

  In addition to the reflection surface configured to reflect the light from the light exit surface of the light guide lens body forward, it includes an individual reflection surface that reflects the light from the second reflection surface forward. Therefore, by making the shapes of the individual reflection surfaces different, it is possible to realize various appearances of light emission in which the light emission by the reflection surface and the light emission by the individual reflection surface are combined.

  Another aspect of the present invention is a light guide lens including a light guide lens main body extending in a predetermined direction, a rib portion extending in a direction intersecting the predetermined direction, and disposed behind the light guide lens. A light source that emits light guided in the predetermined direction in the light guide lens body, and the light guide lens body includes a third reflection surface and a light exit surface, In the third reflecting surface, a part of the light from the light source guided in the light guide lens body travels in the rib portion toward the tip, and guides the light guide lens body. The rib portion reflects the inner surface of at least a part of the light from the light source guided in the light guide lens body so that another part of the light from the light source is emitted from the light exit surface. Includes a front surface and a rear surface opposite to the front surface, and the rear surface of the rib portion is within the rib portion. The light from the third reflecting surface that travels toward the front end of the light beam is emitted from the front surface and irradiated forward so that the inside of the rib portion from the third reflecting surface that travels toward the front end portion It includes at least one individual reflecting surface that internally reflects light toward the front surface, and the surface shape of the light emitting surface of the light guide lens body is such that light from the third reflecting surface that emits light from the light emitting surface reflects the light. The reflective surface is configured to reflect the light from the light exit surface of the light guide lens body that is incident on the reflective surface toward the front. It is a vehicle lamp.

  According to this aspect, it is possible to provide a vehicular lamp that can increase variations in the light-emitting method as compared with the related art. In addition, the lighting feeling can be improved.

  In addition to the reflection surface configured to reflect the light from the light exit surface of the light guide lens main body forward, it includes an individual reflection surface that reflects the light from the third reflection surface forward. Therefore, by making the shapes of the individual reflection surfaces different, it is possible to realize various appearances of light emission in which the light emission by the reflection surface and the light emission by the individual reflection surface are combined.

  In the above invention, a preferable aspect is characterized in that the reflecting surface is arranged behind the rib portion so as to be seen through the rib portion in a front view.

  In the above invention, a preferred aspect is characterized in that the light guide lens main body and the rib portion are formed separately.

1 is an exploded perspective view of a vehicular lamp 10. FIG. 1 is a top view of a vehicular lamp 10. FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a figure explaining the optical path from the light source. It is a figure explaining the optical path from the light source. It is a figure explaining the determination method of the surface shape of the reflective surface 31 of the reflector 30. FIG. It is a longitudinal cross-sectional view of vehicle lamp 10A (modification). It is a longitudinal cross-sectional view of vehicle lamp 10A (modification). It is a longitudinal cross-sectional view of the light guide lens 20 (modified example). It is a rear view of the vehicle 50 carrying the vehicle lamp 10 provided with the light guide lens 20 of FIG. It is a longitudinal cross-sectional view of the vehicle lamp 10 (modification).

  Hereinafter, a vehicle lamp 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each figure, corresponding components are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is an exploded perspective view of the vehicular lamp 10. FIG. 2 is a front view of the vehicular lamp 10. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 4 is a cross-sectional view taken along the line BB in FIG.

  A vehicle lamp 10 shown in FIGS. 1 to 4 is, for example, a sign lamp (or a signal lamp) that functions as a tail lamp, a turn lamp, or a stop lamp, and a left side of a rear end portion of a vehicle (not shown) and Mounted on the right side.

  As shown in FIGS. 1 to 4, the vehicular lamp 10 includes a light source 12, a substrate 14, an extension 16, a light guide lens 20, and a reflector 30. Although not shown, the vehicular lamp 10 is disposed in a lamp chamber composed of an outer lens and a housing, and is attached to the housing or the like.

  The light source 12 has, for example, a structure in which an LED element whose emission color is in a blue region (for example, an LED element including a 1 mm square light emitting surface) and a yellow wavelength conversion member (for example, a YAG phosphor) covering the same are combined. It is a white LED light source. The number of light sources 12 may be one or more.

  The substrate 14 is a metal substrate, and the light source 12 is mounted on the surface of the substrate. The substrate 14 is fixed to a housing or the like.

  The light guide lens 20 includes a light guide lens body 20a extending in a predetermined direction (hereinafter also referred to as a longitudinal direction), and a side surface of the light guide lens body 20a from the longitudinal direction (and the traveling direction of reflected light from the first reflecting surface 22). ) And a plate-like rib portion 24 extending in a direction intersecting. The rib portion 24 also extends in the longitudinal direction.

  The side surface of the light guide lens body 20 a includes a first reflection surface 22, a light exit surface 25 (refractive surface), and a second reflection surface 23. The first reflection surface 22, the light exit surface 25, and the second reflection surface 23 each extend in the longitudinal direction. The light guide lens 20 may be made of polycarbonate or other transparent resin such as acrylic. The light guide lens 20 may be made of, for example, a silicon resin. Furthermore, the light guide lens 20 may be made of glass, for example.

  As shown in FIGS. 1 and 2, the light guide lens body 20a includes a light incident surface 21 (hereinafter also referred to as a light incident portion 21) at one end thereof.

  The light incident surface 21 is a surface provided at a position facing the light source 12 (substrate 14), and enters light from the light source 12 into the light guide lens 20. As shown in FIGS. 1 and 2, the light incident surface 21 may be a convex surface such as a cylindrical shape, or may be a flat surface.

  The light guide lens body 20a guides the light from the light source 12 that has entered from one end portion (light entrance surface 21) in the longitudinal direction toward the other end portion in the longitudinal direction.

  The first reflecting surface 22 reflects at least part of the light from the light source 12 guided in the longitudinal direction in the light guide lens body 20a toward the front with respect to the first reflecting surface 22 (total reflection). For example, a lens cut surface having a plurality of lens cuts. As this lens cut surface, for example, the one described in JP-A-2006-157552 can be used.

  The second reflecting surface 23 is a surface that internally reflects at least a part of the reflected light from the first reflecting surface 22, and a part of the reflected light from the first reflecting surface 22 faces the inside of the rib portion 24 toward the tip thereof. 5 (see FIG. 5) and is inclined forward of the first reflecting surface 22 so that another part of the reflected light from the first reflecting surface 22 exits from the light emitting surface 25 (see FIG. 6). Provided in posture.

  The rib portion 24 includes a front surface 24c and a rear surface 24d opposite to the front surface 24c.

  The rear surface 24d of the rib portion 24 is disposed in the rib portion 24 so that light from the second reflecting surface 23 traveling toward the tip portion of the rib portion 24 is emitted from the front surface 24c and irradiated forward. It includes individual reflecting surfaces 24a1 and 24a2 that internally reflect the light from the second reflecting surface 23 traveling toward the front end portion toward the front surface 24c. Note that at least one individual reflection surface is sufficient.

  The individual reflecting surfaces 24a1 and 24a2 extend linearly in the longitudinal direction of the light guide lens body 20a.

  The individual reflecting surfaces 24a1 and 24a2 extending linearly in the longitudinal direction reflect the light from the second reflecting surface 23 toward the front, whereby two lines of light emission can be realized. Moreover, dot-like light emission can also be realized by using the reflection surfaces arranged in a dot shape in the longitudinal direction as the individual reflection surfaces 24a1 and 24a2. Furthermore, by using reflective surfaces having various shapes such as patterns and characters as the individual reflective surfaces 24a1 and 24a2, various appearances of light emission can be realized.

  The surface shape of the light exit surface 25 of the light guide lens body 20a is such that the light from the second reflective surface 23 that is refracted from the light exit surface 25 and exits the light is in the entire area or a partial area (area to be a light emitting area) of the reflective surface 31 It is configured to enter (see FIG. 6).

  The reflector 30 includes a reflective surface 31. The reflective surface 31 is formed by aluminum vapor deposition or the like. The reflecting surface 31 is disposed behind the rib portion 24 so as to be seen through the rib portion 24 in a front view (see FIG. 3 and the like).

  The surface shape of the reflecting surface 31 is configured to reflect light from the light exit surface 25 of the light guide lens 20 incident on the reflecting surface 31 forward (see FIG. 6).

  By adjusting at least one of the surface shape of the light exit surface 25 of the light guide lens 20 and the surface shape of the reflective surface 31, uniform light emission of the reflective surface 31 (make it visible as if light is emitted uniformly) or Non-uniform light emission can be realized.

  The extension 16 is disposed so as to cover the light guide lens body 20a so that the light guide lens body 20a is not visually recognized in front view.

  FIG. 7 is a diagram illustrating a method for determining the surface shape of the reflecting surface 31 of the reflector 30.

  For example, in the light guide lens 20 shown in FIG. 7, first, a surface 41 that is offset by 0.5 (mm) or more in the direction in which the extension 16 is located from the light emitting area of the light guide lens 20 is determined. Further, the surface 42 that is offset by 0.5 (mm) or more rearward from the lower end portion of the light guide lens body 20a is determined. Then, the intersection of the surface 41 and the surface 42 is determined as the intersection 45. Next, a surface 43 offset by 0.5 (mm) or more from the front surface of the light guide lens body 20a is determined. Further, the surface 44 extending forward from the end point of the light emitting area is determined. Then, the intersection of the surface 43 and the surface 44 is determined as the intersection 46. Thereafter, the intersection 45 and the intersection 46 are connected by a spline so that the intersection 45 and the surface 42 are connected by a tangent.

  Thereby, the surface shape of the reflective surface 31 which advances the light which passed through the light emission surface 25 and the reflective surface 31 toward the front can be determined.

  As described above, according to the present embodiment, it is possible to provide the vehicular lamp 10 capable of increasing variations in the light emitting method as compared with the related art. In addition, the lighting feeling can be improved.

  This is because the light from the second reflection surface 23 is reflected forward in addition to the reflection surface 31 configured to reflect the light from the light exit surface 25 of the light guide lens body 20a forward. Since the reflecting surfaces 24a1 and 24a2 are provided, the shapes of the individual reflecting surfaces 24a1 and 24a2 are made different so that various light emission appearances in which the light emission by the reflecting surface 31 and the light emission by the individual reflecting surfaces 24a1 and 24a2 are combined are realized. Is due to what can be done.

  Further, according to the present embodiment, it is possible to improve the appearance of the vehicular lamp 10 when viewed from the front when the light source 12 is turned on and when it is not turned on.

  Specifically, when the light source 12 is turned on, light emission by the light emission of the individual reflection surfaces 24a1 and 24a2 (for example, two line light emission) can be included in the surface light emission by the reflection surface 31 in front view.

  In addition, when the light source 12 is not lit, it is possible to achieve a crystal-like appearance in which the reflective surface 31 is visually recognized through the rib portion 24 when viewed from the front.

  This is because the reflecting surface 31 is arranged behind the rib portion 24 so as to be seen through the rib portion 24 in a front view.

  Next, a modified example will be described.

  In the above embodiment, the example in which the light guide lens 20 including the second reflecting surface 23 is used as the light guide lens is described, but the present invention is not limited thereto. For example, as shown in FIG. 8, a light guide lens 20A in which the second reflecting surface 23 is omitted may be used as the light guide lens.

  The light guide lens 20A of the present modification has a light guide lens body 20Aa extending in a predetermined direction (hereinafter also referred to as a longitudinal direction) and a direction intersecting the longitudinal direction (and the progress of reflected light from the third reflecting surface 22A). Plate-shaped rib portion 24A extending in the direction). The rib portion 24A also extends in the longitudinal direction.

  The side surface of the light guide lens body 20Aa includes a third reflection surface 22A and a light exit surface 25A. The third reflecting surface 22A and the light exiting surface 25A each extend in the longitudinal direction.

  The third reflection surface 22A is a surface that internally reflects at least a part of the light from the light source 12 guided in the light guide lens body 20Aa toward the front with respect to the third reflection surface 22A. It is a lens cut surface which has the following lens cut. As this lens cut surface, for example, the one described in JP-A-2006-157552 can be used.

  The rib portion 24A and the light exit surface 25A are provided in front of the third reflective surface 22A so that the reflected light from the third reflective surface 22A enters.

  In the third reflecting surface 22A, a part of the light from the light source 12 guided in the light guide lens body 20Aa travels in the rib portion 24 toward the tip, and in the light guide lens body 20Aa. At least a part of the light from the light source 12 guided in the light guide lens body 20Aa is internally reflected so that another part of the light from the light source 12 guided is emitted from the light exit surface 25A.

  The rib portion 24A includes a front surface 24Ac and a rear surface 24Ad opposite to the front surface 24Ac.

  The rear surface 24Ad of the rib portion 24A is disposed in the rib portion 24A so that light from the third reflecting surface 22A traveling toward the tip end portion in the rib portion 24A is emitted from the front surface 24Ac and irradiated forward. It includes individual reflecting surfaces 24Aa1 and 24Aa2 that internally reflect light from the third reflecting surface 22A traveling toward the front end portion toward the front surface 24Ac. Note that at least one individual reflection surface is sufficient.

  The surface shape of the light exit surface 25A of the light guide lens body 20Aa is such that the light from the third reflective surface 22A that is refracted from the light exit surface 25A and exits the light is on the entire or a partial region of the reflective surface 31 (region to be a light emitting area). It is configured to enter (see FIG. 9).

  The surface shape of the reflecting surface 31 is configured to reflect light from the light exit surface 25A of the light guide lens body 20Aa incident on the reflecting surface 31 forward (see FIG. 9).

  Even when the light guide lens 20 </ b> A of this modification is used, the same effects as in the above embodiment can be obtained.

  Moreover, although the said embodiment demonstrated the example which applied the vehicle lamp of this invention to the marker lamp (or signal lamp) which functions as a tail lamp, a turn lamp, or a stop lamp, it does not restrict to this. For example, the vehicular lamp of the present invention may be applied to a lighting device for amusement equipment.

  Moreover, although the said embodiment demonstrated the example in which at least one part of the light reflected by the reflective surface 31 permeate | transmits the rib part 24, it is not restricted to this. For example, the light guide lens 20 and the reflection surface 31 may be separated from each other, and the light reflected by the reflection surface 31 may not pass through the rib portion 24.

  Moreover, although the said embodiment demonstrated the example in which the light-incidence part 21 was provided in the one end part of the longitudinal direction in the light guide lens 20, it is not restricted to this. For example, as shown in FIG. 10, the light incident portion 21 may be provided between one end portion and the other end portion of the light guide lens 20. In this case, as shown in FIG. 10, it is desirable to provide a reflecting surface 26 that reflects light from the light source 12 toward both ends of the light guide lens body 20a.

  Moreover, although the said embodiment demonstrated the example using the light guide lens 20 (and reflection surface 31) extended linearly in the predetermined direction as a light guide lens, it is not restricted to this. For example, as shown in FIG. 11, a light guide lens 20 (and a reflective surface 31) extending in a curved shape in a predetermined direction may be used.

  The light source 12 and the light incident portion 21 may be provided at both ends of the light guide lens 20 in the longitudinal direction.

  FIG. 12 is a longitudinal sectional view of the vehicular lamp 10 (modified example).

  Moreover, although the said embodiment demonstrated the example in which the rib part 24 was integrally formed with the light guide lens main body 20a, it does not restrict to this. For example, as shown in FIG. 12, the rib part 24 may be formed separately from the light guide lens body 20a. In this case, the light exit surface 27 of the light guide lens body 20a and the light incident surface 24e of the rib portion 24 are positioned (fixed) in a state of surface contact, for example. Note that the light exit surface 27 of the light guide lens body 20a and the light incident surface 24e of the rib portion 24 may be positioned so as to be parallel without being in surface contact, for example.

  Moreover, although the said embodiment demonstrated the case where the cross-sectional shape of the light guide lens main body 20a was a polygon, it is not restricted to this. For example, the cross-sectional shape of the light guide lens main body 20a may be a circular shape or other shapes.

  Moreover, although the said embodiment demonstrated the example using the reflective surface 31 formed by aluminum vapor deposition etc. as a reflective surface, it does not restrict to this. For example, a reflective surface painted in white or other reflective surface may be used as the reflective surface.

  All the numerical values shown in the above embodiment are exemplifications, and it is needless to say that convenient numerical values different from the numerical values can be used.

  The above embodiment is merely an example in all respects. The present invention is not construed as being limited by the description of the above embodiment. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

DESCRIPTION OF SYMBOLS 10 ... Vehicle lamp, 12 ... Light source, 14 ... Board | substrate, 16 ... Extension, 20, 20A ... Light guide lens, 20a, 20Aa ... Light guide lens main body, 21 ... Light-incident surface, 22 ... 1st reflective surface, 22A ... 3rd reflective surface, 23 ... 2nd reflective surface, 24, 24A ... Rib part, 24a1, 24a2, 24Aa1, 24Aa2 ... Individual reflective surface, 24c, 24Ac ... Front surface, 24d, 24Ad ... Rear surface, 24e ... Light incident surface, 25 25A ... light exit surface, 26 ... reflecting surface, 27 ... light exiting surface, 30 ... reflector, 31 ... reflecting surface, 41, 42, 43, 44 ... surface, 45, 46 ... intersection, 50 ... vehicle

Claims (4)

A light guide lens including: a light guide lens body extending in a predetermined direction; and a rib portion extending in a direction intersecting the predetermined direction;
A reflective surface disposed behind the light guide lens;
A light source that emits light guided in the predetermined direction in the light guide lens body,
The light guide lens body includes a first reflection surface that internally reflects at least a part of light from the light source guided in the light guide lens body, a light exit surface, and reflected light from the first reflection surface. From the first reflecting surface so that a part of the light travels toward the tip of the rib and the other part of the reflected light from the first reflecting surface exits from the light emitting surface. A second reflecting surface that internally reflects at least a part of the reflected light,
The rib portion includes a front surface and a rear surface on the opposite side,
The rear surface of the rib portion is formed in the rib portion so that the light from the second reflecting surface that travels toward the tip portion in the rib portion is emitted from the front surface and irradiated forward. Including at least one individual reflecting surface for internally reflecting light from the second reflecting surface traveling toward the front surface,
The surface shape of the light exit surface of the light guide lens body is configured such that light from the second reflective surface that exits from the light exit surface is incident on the reflective surface,
The surface shape of the reflection surface is a vehicular lamp configured to reflect the light from the light exit surface of the light guide lens body incident on the reflection surface toward the front. A light guide lens including: a light guide lens body extending in a predetermined direction; and a rib portion extending in a direction intersecting the predetermined direction;
A reflective surface disposed behind the light guide lens;
A light source that emits light guided in the predetermined direction in the light guide lens body,
The light guide lens body includes a third reflective surface and a light exit surface,
In the third reflecting surface, a part of the light from the light source guided in the light guide lens body travels in the rib portion toward the tip, and is guided in the light guide lens body. So that another part of the light emitted from the light source is emitted from the light exit surface, and internally reflects at least a part of the light from the light source guided in the light guide lens body,
The rib portion includes a front surface and a rear surface on the opposite side,
The rear surface of the rib portion is formed in the rib portion so that the light from the third reflecting surface traveling toward the tip portion in the rib portion is emitted from the front surface and irradiated forward. Including at least one individual reflecting surface that internally reflects light from the third reflecting surface that travels toward the front surface,
The surface shape of the light exit surface of the light guide lens body is configured such that light from the third reflective surface that exits from the light exit surface is incident on the reflective surface,
The surface shape of the reflection surface is a vehicular lamp configured to reflect the light from the light exit surface of the light guide lens body incident on the reflection surface toward the front.   The vehicular lamp according to claim 1, wherein the reflecting surface is disposed behind the rib portion so as to be seen through the rib portion in a front view.   The vehicular lamp according to any one of claims 1 to 3, wherein the light guide lens main body and the rib portion are formed separately.

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