JP6179090B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp.

As a vehicular lamp, an LED (Light Emitting Diode) light source as a light source, a light guide lens as a light guide, and a reflection surface are known (see, for example, Patent Document 1).
The light emitted from the LED light source as the light source enters from the incident surface of the light guide lens, is reflected by the reflecting surface, and is emitted from the output surface of the light guide lens.

JP 2011-181343 A

  However, when the light source is not turned on, the member on the back side of the light guide is seen through the light guide, and the appearance when the light source is not turned on is impaired. In addition, there are restrictions on the expression of the design.

  The present invention has been made based on such circumstances, and an object of the present invention is to provide a vehicular lamp having a good appearance and rich design.

  The vehicular lamp according to the present invention is formed on a light source, a light guide that extends in a direction for guiding light from the light source, and emits light from the light source, and a back surface of the light guide. A decorative member provided with a plurality of prisms for reflecting light from the light source toward the exit surface and a curved surface provided facing the back surface and visible through the light guide when the light source is not lit. And a space formed by the back surface of the light guide and the curved surface of the decorative member.

  In the vehicular lamp according to the present invention, the emission surface has a convex shape.

  In the vehicle lamp of the present invention, the light guide body and the decorative member have a shape that gradually narrows in a direction in which light from the light source is guided.

  In the vehicular lamp of the present invention, the decorative member is subjected to a reflection process.

  In the vehicular lamp of the present invention, the decorative member is a white material.

  According to the vehicular lamp of the present invention, it is possible to provide a vehicular lamp that has a good appearance and is rich in design.

1 is a schematic external view of a headlamp including a position lamp in an embodiment. The schematic exploded perspective view of a position lamp. The schematic cross-sectional perspective view of a position lamp. The figure which shows the mode of arrangement | positioning of several microprisms in a back surface. The partial cross section perspective view of a headlamp. Sectional drawing of the position lamp in the modification 1. FIG. FIG. 10 is a schematic enlarged view of the vicinity of a rear lamp in Modification 2.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.

FIG. 1 is a schematic enlarged view of the vicinity of a headlamp 100 provided with a vehicular lamp to which the present invention is applied. The headlamp 100 is provided in front of the vehicle 1.
In FIG. 1, X, Y, and Z directions are shown, which correspond to the forward direction of the vehicle, the width direction of the vehicle, and the height direction of the vehicle, respectively. Hereinafter, the X, Y, and Z directions are also shown in each drawing as necessary.

The headlamp 100 includes a position lamp 10 as a vehicle lamp, a high beam lamp 20, a low beam lamp 30, a turn lamp 40, and an outer lens 50. The outer lens 50 forms a lamp chamber with a housing (not shown), and the position lamp 10, the high beam lamp 20, the low beam lamp 30, and the turn lamp 40 are arranged in the lamp chamber.
In the headlamp 100, a high beam lamp 20, a low beam lamp 30, and a turn lamp 40 are sequentially arranged from the inside to the side (Y direction). The position lamp 10 is disposed above (in the Z direction) the high beam lamp 20, the low beam lamp 30 and the turn lamp 40. The position lamp 10 extends elongated from the inside toward the side (Y direction). Light emitted from these lamps is transmitted forward (X direction) through the outer lens 50 disposed in front.

FIG. 2 is a schematic exploded perspective view of the position lamp 10, and FIG. 3 is a schematic cross-sectional perspective view of the position lamp 10.
In FIG. 2, a position lamp 10 includes an LED light source 11 as a light source, a substrate 12 on which the LED light source 11 is mounted, an inner lens 13 as a light guide that guides light from the LED light source 11, and a decorative member. And a plating mall 14.

In FIG. 1, the LED light source 11 and the board | substrate 12 are arrange | positioned inside which cannot be visually recognized from the front (X direction). The LED light source 11 emits light toward a side (Y direction) indicated by a solid line arrow.
1 and 2, one end of the inner lens 13 is disposed on the LED light source 11 and the substrate 12 side, and extends in a side direction (Y direction) which is a direction for guiding light from the LED light source 11. Yes.
Further, the inner lens 13 has a shape in which the emission surface 130 becomes gradually narrower in the direction (Y direction) for guiding the light from the LED light source 11.

In FIG. 3, the inner lens 13 has an emission surface 130 that emits light from the LED light source 11 and a back surface 131 with respect to the emission surface 130. Although not shown, the emission surface 130 has a substantially cylindrical convex shape, and the back surface 131 has a substantially planar shape.
The inner lens 13 is formed of a translucent material made of resin, for example.
A plurality of minute prisms 132 that reflect light from the LED light source 11 toward the emission surface 130 are formed on the back surface 131.

  In FIG. 3, a solid line arrow L indicates that the light from the LED light source 11 is reflected by the microprism 132 and travels toward the emission surface 130. The emission direction of the light emitted from the emission surface 130 is determined by the angle from the microprism 132 to the emission surface 130, the shape of the emission surface 130, the refractive index of the inner lens 13, and the like, but in the embodiment, the light is emitted from the emission surface 130. The light is adjusted so that it will go forward.

FIG. 4 shows the arrangement of the plurality of microprisms 132 on the back surface 131.
The microprisms 132 are arranged in a grid pattern on the flat portion 1310 of the back surface 131. The shape of the microprism 132 is appropriately selected according to the direction in which light enters and the direction in which light is reflected, such as a triangular pyramid, a triangular prism, and a quadrangular pyramid.

2 and 3, the plating molding 14 is provided to face the back surface 131 of the inner lens 13. Therefore, the plating molding 14 also has a shape that becomes gradually narrower in the direction (Y direction) for guiding the light from the LED light source 11, similarly to the shape of the emission surface 130.
The plating molding 14 has a concave surface 140 that is a substantially cylindrical curved surface facing the back surface 131 of the inner lens 13. Therefore, the space 15 is formed by the back surface 131 of the inner lens 13 and the concave surface 140 of the plating molding 14. This space 15 is formed, for example, in order to obtain a predetermined refractive index in the microprism 132 in relation to the material of the inner lens 13.
In addition, since the inner lens 13 is formed of a translucent material, the concave surface 140 of the plating molding 14 is visible through the inner lens 13 when the LED light source 11 is not lit.

The concave surface 140 is plated with chromium, aluminum or the like as a reflection treatment. The plating is performed by dry plating such as vapor deposition or sputtering, or wet plating such as electroplating or electroless plating. The reflection process is not limited to plating, and may be a coating process or a coating process by immersion.
The base material 141 of the plating molding 14 may be formed of a material that transmits light, or may be formed of a material that does not transmit light. When the base material 141 is formed of a material that transmits light, the surface to be plated may be the back surface of the concave surface 140 of the plating molding 14.

FIG. 5 shows a partial sectional perspective view of the headlamp 100. FIG. 5 corresponds to a cross-sectional view taken along line XX in FIG.
In FIG. 5, the optical path L of the light from the LED light source 11 is indicated by a solid line arrow. Moreover, the leak light was shown with the broken-line arrow.
The light emitted from the LED light source 11 is reflected by a plurality of prisms 132 (see FIG. 4) formed on the back surface 131 and travels forward (X direction). In addition, the light irregularly reflected in the inner lens 13 is reflected and transmitted by the flat portion 1310 (see FIG. 4) of the back surface 131 shown in FIG. 4 to become leaked light, toward the direction different from the front or the plating molding 14. move on.

  The light traveling toward the plating molding 14 is reflected by the concave surface 140 of the plating molding 14 and travels toward the inner lens 13 again. Thereafter, the light advances to the outer lens 50 as leakage light. On the other hand, the light reflected by the reflective surface 140 of the plating molding 14 travels to the outer lens 50 as leakage light. These leakage lights are emitted as part of the light from the position lamp 10.

The embodiment described above has the following effects.
(1) Since the member visible through the inner lens 13 when the LED light source 11 is not lit is the plating mall 14, the position lamp 10 having a good appearance and rich design can be provided.

(2) When the LED light source 11 is not lit, it is visually recognized as the plating molding 14, and when the LED light source 11 is lit, light from the LED light source 11 is emitted from the emission surface 130 of the inner lens 13 provided facing the plating molding 14. Thus, it is possible to provide a position lamp 10 that appears to have light lit from the plating mall 14 and has a different appearance depending on whether it is lit or not.

(3) Since the light irregularly reflected in the inner lens 13 returns to the inner lens 13 by the concave surface 140 of the plating molding 14, it is possible to provide the position lamp 10 in which the diffusion of leakage light can be suppressed.

(4) Since the emission surface 130 has a convex shape, a sense of depth increases in the appearance of the plating molding 14.

(5) Since the inner lens 13 and the plating molding 14 have a shape that becomes gradually narrower in the direction in which the light from the LED light source 11 is guided, the amount of light that the inner lens 13 guides away from the LED light source 11 is reduced. Even if it falls, the change of the emitted amount of the light per unit area in the output surface 130 of the inner lens 13 is suppressed. Therefore, the exit surface 130 of the inner lens 13 shines uniformly, and the position lamp 10 with good appearance can be provided.

(6) Since the plating molding 14 becomes the light emission range of the inner lens 13, the space can be effectively used.

(Modification 1)
FIG. 6 shows a cross-sectional view of the position lamp 10A in this modification.
The position lamp 10A includes an inner lens 13A, a plating molding 14A, and a space 15A.
The inner lens 13A of this modification includes a back surface 130A that is a substantially cylindrical concave surface, and the plating molding 14A includes a convex surface 140A that is a substantially cylindrical curved surface.

According to this modification, the following effects are obtained.
(7) Since the plating molding 14A includes the convex surface 140A that is a substantially cylindrical curved surface, the depth of the plating molding 14A is further increased.

(Modification 2)
FIG. 7 shows a schematic enlarged view of the vicinity of the rear lamp 200 in this modification.
The rear lamp 200 includes a tail lamp 60 as a vehicle lamp, a stop lamp 70, a turn lamp 80, and an outer lens 90.

  In the rear lamp 200, a stop lamp 70 and a turn lamp 80 are sequentially arranged from the inside to the side (Y direction). A tail lamp 60 is arranged above the stop lamp 70 and the turn lamp 80 (Z direction). Light emitted from these lamps passes through the outer lens 90 and is emitted backward (in the direction opposite to the X direction).

  The head lamp 100 of the embodiment and the rear lamp 200 of the present modified example have slightly different shapes of the position lamp 10 of the embodiment as the vehicular lamp of the present invention and the tail lamp 60 of the modified example as viewed from the outside. The shape may be different depending on the design for improving the appearance. For example, you may have the shape of the same width toward the direction which guides the light from LED light source 11.

The vehicular lamp of the present invention is not limited to the above-described embodiments and modifications.
For example, when the amount of light emitted from the emission surface 130 is not uniform due to the shape of the position lamp 10 or the tail lamp 60 as a vehicle lamp, the size, arrangement, and number of the minute prisms 132 (see FIG. 4) are adjusted. Thus, the amount of light emitted from the emission surface 130 can be made uniform.

  For example, when it is desired to increase the amount of light emitted from the exit surface 130, the size of the small prisms 132 per unit area of the back surface 131 is increased or the number is increased. When it is desired to reduce the amount of light emitted from the exit surface 130, the size of the small prisms 132 per unit area of the back surface 131 is reduced or the number is reduced.

  Further, by adjusting the size, arrangement, and number of the microprisms 132 shown in FIG. 4, the intensity of light emitted from the emission surface 130 can be increased or decreased depending on the location. Therefore, various light emission patterns can be produced.

Further, the decorative member is not limited to the plating moldings 14 and 14A, and may be a white material or a fluorescent material as long as it is a highly reflective material, or a base material 141 may be provided with a film-like white material or a fluorescent material. Good.
Further, a multilayer film may be formed of a dielectric such as silicon dioxide or zirconium oxide on the concave surface 140 or the convex surface 140A to form a reflective surface.
The decorative member may be a colored member.

  Furthermore, by changing the shape and curvature of the emission surface 130, the concave surface 140, and the convex surface 140A of the inner lens 13, the appearance and the pattern of light emitted from the emission surface 130 can be changed to a desired pattern. For example, the concave surface 140 of the plating molding 14 has a convex appearance because the emission surface of the inner lens 13 is convex.

  As mentioned above, although this invention was demonstrated using embodiment and a modification, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment and modification. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above-described embodiments and modifications. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 10, 10A ... Position lamp, 11 ... LED light source, 12 ... Board | substrate, 13, 13A ... Inner lens, 14, 14A ... Plating mall, 15, 15A ... Space, 20 ... High beam lamp, 30 ... Low beam lamp, DESCRIPTION OF SYMBOLS 40 ... Turn lamp, 50, 90 ... Outer lens, 130 ... Output surface, 131, 131A ... Back surface, 132 ... Micro prism, 140 ... Concave surface, 140A ... Convex surface, 141 ... Base material, 60 ... Tail lamp, 70 ... Stop lamp, 80: Turn lamp, 100: Head lamp, 200: Rear lamp, 1310: Plane portion.

Claims (3)

A light source;
A light guide having an emission surface extending in a direction in which light from the light source is guided and having a curved convex surface as a cross section for emitting the light from the light source;
A plurality of prisms formed on the back surface of the light guide and reflecting light from the light source toward an exit surface of the light guide;
A decorative member that is provided opposite to the back surface of the light guide and is subjected to a reflection process having a convex surface that is a curved surface that is visible through the light guide when the light source is not lit.
A vehicle lamp, comprising: a space formed by a back surface of the light guide and a convex surface that is a curved surface of the decorative member. The vehicular lamp according to claim 1 , wherein a back surface of the light guide is a concave surface that is a curved surface. The vehicular lamp according to claim 1 or 2 , wherein the light guide body and the decorative member have a shape that becomes gradually narrower in a direction in which light from the light source is guided.

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