JP2015060725A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To acquire a lighting feeling having a sense of unity as a whole even when radiating reflection light and non-reflection light forward simultaneously.SOLUTION: A vehicular lighting fixture 1 includes: an LED 41 for emitting light forward; a rear plate part 51 in front of the LED 41; a reflection part 21 in a reflection direction X of the rear plate part 51; and a front plate part 52 in front of the rear plate part 51. The rear plate part 51 has: a light passing hole 51a formed by a translucent material and passing one part of light out of the light from the LED 41; and a first reflection surface 51b in which a reflection film is coated and which reflects the other light excluding the one part of light to the reflection direction X. The reflection part 21 has: a second reflection surface 21a for reflecting the light reflected at the first reflection surface 51b of the rear plate part 51 forward; and a frontward-facing third reflection surface 21b which continues to the second reflection surface 21a and is substantially along the reflection direction X. The front plate part 52 has a lens cut part 52a for transmitting the light which has passed through the light passing hole 51a of the rear plate part 51 while making it refract in a frontward direction.

Description

  The present invention relates to a vehicular lamp.

  2. Description of the Related Art Conventionally, various types of vehicle lamps mounted on a vehicle are known that simultaneously emit direct light from a light source and reflected light obtained by reflecting light from the light source (for example, Patent Document 1). reference). In this type of vehicle lamp, for example, as shown in FIG. 8, the light emitted forward from the light source (bulb) is irradiated forward as it is, and the light emitted laterally from the light source is emitted in a plurality of steps. The light is reflected forward by the reflecting surface, and the direct light and the reflected light are emitted from the regions adjacent to each other or partially overlapping each other.

JP 2000-48607 A

  However, in the conventional vehicular lamp, the reflected light is weaker than the direct light (non-reflected light) by the amount of decrease in the luminous flux utilization rate at the time of reflection. For this reason, when the lamp is turned on when viewed from the front, the feeling of shining around the light source due to direct light is strong, and the lighting feeling as a whole is not felt.

  The present invention has been made to solve the above-described problem, and can provide a lighting feeling with a sense of unity as a whole even when reflected light and non-reflected light are simultaneously irradiated forward. The purpose is to provide lighting fixtures.

In order to achieve the above object, the invention according to claim 1 is a vehicular lamp,
A light source that emits light substantially radially forward,
Provided in front of the light source, while allowing a part of the light emitted from the light source to pass therethrough, the light other than the part of the light is reflected in a predetermined reflection direction intersecting the front-rear direction. A reflective light transmission part;
A lens unit that is provided in front of the reflective light transmitting unit and transmits the light that has passed through the reflective light transmitting unit forward;
A reflection part that is provided in a position of the reflection light transmission part in the reflection direction and that is adjacent to or partially overlaps with the lens part when viewed from the front, and that reflects the light reflected by the reflection light transmission part; ,
With
The reflective light transmitting portion is formed of a light transmissive material, and a light transmitting hole through which the part of light passes, and a first reflective surface that is coated with a reflective film and reflects the other light in the reflection direction. And
The lens unit has a lens cut that transmits the part of the light that has passed through the light transmitting hole of the reflective light transmitting unit while refracting the light forward.
The reflecting portion includes a second reflecting surface that reflects light reflected by the first reflecting surface of the reflecting light transmitting portion forward, and the reflection direction of the second reflecting surface and substantially along the reflecting direction. And a third reflecting surface facing forward.

The invention according to claim 2 is the vehicle lamp according to claim 1,
The lens portion has a plurality of the lens cuts substantially along the reflection direction,
The reflection portion is formed in a stepped shape that is stepwise positioned in a front direction perpendicular to the reflection direction as it is separated from the reflection light transmission portion substantially along the reflection direction, and is a step surface thereof. A plurality of the second reflection surfaces, and a plurality of the third reflection surfaces which are step surfaces,
The plurality of lens cuts and the plurality of second reflection surfaces have distribution modes in the reflection direction that correspond to each other.

The invention according to claim 3 is the vehicle lamp according to claim 1 or 2,
The reflection light transmitting portion and the lens portion are integrally formed.

Invention of Claim 4 is a vehicle lamp as described in any one of Claims 1-3,
The light source is a light emitting diode.

According to the present invention, a part of the light emitted from the light source that has passed through the light transmission hole of the reflection light transmission part is transmitted through the lens part while being refracted forward by the lens cut of the lens part. On the other hand, the light other than this part of the light is reflected in the reflection direction by the first reflection surface of the reflection light transmitting portion and then reflected forward by the second reflection surface of the reflection portion. At this time, a small part of the other light incident from the light source to the first reflecting surface of the reflective light transmitting portion is transmitted through the reflecting film coated on the first reflecting surface, and is formed of a light transmitting member. After passing through the reflective light transmitting part, the part other than the lens cut of the lens part is transmitted forward. Also, at this time, the third reflecting surface connected to the second reflecting surface of the reflecting portion is substantially along the reflecting direction, so that the light from the first reflecting surface is hardly reflected, but slight light in the lamp chamber is not reflected. Reflect forward.
As a result, when the lamp is viewed from the front, a portion that shines relatively strongly due to the lens cut of the lens portion and the second reflection surface of the reflection portion, and the third reflection of the lens portion portion other than the lens cut and the reflection portion A portion that shines weakly due to the surface is a light emission mode arranged along the reflection direction. Therefore, although the front part of the reflecting part irradiated with the reflected light and the front part of the lens part irradiated with the non-reflected light that does not undergo reflection are different in the presence or absence of reflection in the irradiation light path, as a whole A lighting feeling with a sense of unity can be obtained.

It is a front view of the vehicular lamp in an embodiment. It is a disassembled perspective view of the vehicle lamp in embodiment. It is sectional drawing in the III-III line of FIG. It is sectional drawing in the IV-IV line of FIG. It is a single item figure of the optical member in an embodiment. It is sectional drawing in the VI-VI line of Fig.5 (a). It is a front view of the housing in an embodiment. It is a longitudinal cross-sectional view of the conventional vehicle lamp.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are a front view and an exploded perspective view of the vehicular lamp 1 according to this embodiment, and FIGS. 3 and 4 are cross-sectional views taken along lines III-III and IV-IV in FIG. . 5A to 5F are a front view, a top view, a bottom view, a right side view, a left side view, and a rear view of the optical member 5 included in the vehicular lamp 1, and FIG. It is sectional drawing in the VI-VI line of 5 (a), FIG. 7: is a front view of the housing 2 with which the vehicle lamp 1 is provided.
In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” refer to the direction viewed from the vehicular lamp 1 unless otherwise specified. .

  As shown in FIGS. 1 to 4, the vehicular lamp 1 is a tail lamp provided at a rear portion of a vehicle (not shown), and extends from the lower end to a right side while curving left and right in a gentle wave shape and tapering upward and obliquely to the right. It is formed in a long shape. Specifically, the vehicular lamp 1 includes a housing 2 whose front surface is open and an outer lens 3 that covers the front opening of the housing 2.

The housing 2 is a housing that accommodates the lamp component and also reflects light, and a reflecting portion 21 is formed on the bottom surface of the opening (the front surface of the rear plate). The configuration of the reflecting portion 21 will be described in detail later.
The outer lens 3 is a substantially transparent translucent lens. However, a lens cut (for example, a so-called fish-eye cut) for diffusing transmitted light may be formed on the outer lens 3.

Inside the lamp chamber defined by the housing 2 and the outer lens 3, a light source unit 4 and an optical member 5 are accommodated.
Among these, the light source unit 4 is a unit in which an LED (light emitting diode) 41 that is a light source of the vehicular lamp 1 and a lighting circuit 42 that performs lighting control thereof are unitized. The light source unit 4 is inserted into the insertion hole 2a formed in the lower part of the rear plate of the housing 2 from the rear, and is fixed to the housing 2 with the light emitting surface of the LED 41 facing slightly upward while exposing the rear part. Yes.

  The optical member 5 is formed of a translucent material, and is disposed in the lower part of the housing 2 and in front of the LED 41. The optical member 5 extends the housing 2 while transmitting only a part of the light emitted from the LED 41 forward. By reflecting in the direction, the outer lens 3 emits light over the entire surface. Specifically, as shown in FIGS. 3, 5, and 6, the optical member 5 is positioned in front of the rear plate portion 51 and a substantially curved plate-like rear plate portion 51 that opens obliquely upward to the rear. A slightly curved flat plate-like front plate portion 52 is connected to each other at its upper end and is formed into a integrally configured shape.

Of these, the rear plate portion 51 is a reflection light transmission portion according to the present invention, and the three light transmission holes 51a through which a part of the light emitted from the LED 41 passes, and a part of this. And a first reflecting surface 51b that reflects other light than light.
The three light transmission holes 51a,... Are arranged side by side in the vertical direction, and are formed so as to be longer on the left and right sides and longer on the upper side. These three light passage holes 51a,... Allow some of the light emitted from the LED 41 to pass toward three lens cut portions 52a,.
The first reflecting surface 51b is formed by coating an aluminum film on the rear surface of the rear plate portion 51 including portions around the three light transmission holes 51a,. More specifically, the first reflecting surface 51b is formed in a substantially paraboloidal shape with the focus in the vicinity of the LED 41, and passes through the three light passing holes 51a,... Among the light emitted from the LED 41. Nearly all light except for the light is reflected in the reflection direction X obliquely upward to the right and slightly rearward along the extending direction of the housing 2. The first reflecting surface 51b is not a uniform continuous surface, but is connected to a portion below the upper end portion through a step so that the upper end portion protrudes forward. This is a configuration for reflecting light to the front end (upper end) of the housing 2 by the upper end portion without increasing the first reflection surface 51b (rear plate portion 51).

On the other hand, the front plate portion 52 is a lens portion according to the present invention, and transmits light that has passed through the rear plate portion 51 to the front while refracting it. Specifically, the front plate portion 52 is formed in a shape in which a flat plate orthogonal to the front-rear direction is slightly curved in the front-rear and left-right directions in accordance with the shapes of the housing 2 and the outer lens 3, and includes three lens cut portions 52a, …have.
The three lens cut portions 52a,... Correspond to the three light transmission holes 51a,... Of the rear plate portion 51, and are arranged side by side substantially along the reflection direction X. It is formed to be long on the left and right over the entire width. More specifically, the three lens cut portions 52a,... Are inclined to the lower right as the upper portion follows the curved shape of the front plate portion 52, and the upper and lower spaces and the upper and lower widths are adjacent to each other. It is formed so as to become narrower. These three lens cut portions 52a,... Have cuts formed individually on the front and rear surfaces, respectively, and refract the light passing through the corresponding light passage holes 51a forward by the cuts. While making it permeate.
Further, a portion of the front plate portion 52 excluding the three lens cut portions 52a,... Serves as a through portion 52b that allows light to pass through substantially. This cut-through portion 52b is also cut, but this cut is mainly shallow to improve the appearance when not lit, and has almost no optical function acting on the light from the LED 41. Absent.

  Of the light that has passed through the optical member 5, the light reflected by the first reflecting surface 51 b of the rear plate portion 51 is reflected again by the reflecting portion 21 formed by depositing an aluminum film on the bottom of the opening of the housing 2.

As shown in FIGS. 3 and 7, the reflection portion 21 is formed over substantially the entire area of the opening bottom surface of the housing 2 except for the periphery of the insertion hole 2 a formed in the lower portion, that is, the rear plate portion. 51 in the reflection direction X, which is provided at a position adjacent to (or partially overlapping with) the front plate portion 52 when viewed from the front. Specifically, the reflecting portion 21 is formed in a stepped shape that is stepwise positioned in the front direction perpendicular to the reflecting direction X as it is separated from the rear plate portion 51 substantially along the reflecting direction X. Has a plurality of second reflecting surfaces 21a,... And a plurality of third reflecting surfaces 21b,.
The plurality of second reflection surfaces 21a,... Are surfaces inclined forward with respect to the reflection direction X, and reflect light reflected in the reflection direction X from the first reflection surface 51b of the rear plate portion 51 forward. Let
The plurality of third reflecting surfaces 21b,... Are forward-facing reflecting surfaces that are alternately and individually connected to the second reflecting surface 21a and are formed so as to substantially follow the reflecting direction X. Therefore, the plurality of third reflecting surfaces 21b,... Hardly reflect the light reflected in the reflecting direction X by the first reflecting surface 51b of the rear plate portion 51. As will be described later, the plurality of third reflecting surfaces 21b,. Reflects the miscellaneous light.

  Further, when viewed from the front, the reflecting portion 21 has a plurality of second reflecting surfaces 21a,... Formed in a slightly curved shape that follows the curved shape of the housing 2 to the left and right, and as it moves upward. Thus, the vertical width and the interval (that is, the vertical width of the third reflecting surface 21b) are gradually narrowed. Further, when viewed from the front, the reflecting portion 21 has three lens cut portions 52a of the optical member 5 in which the vertical and width distributions of the plurality of second reflecting surfaces 21a,. Corresponds to those of ... In other words, the plurality of second reflecting surfaces 21a,... And the three lens cut portions 52a,... Are formed so that their vertical width and interval change continuously when viewed from the front. ing.

In the vehicular lamp 1 having the above configuration, the light emitted from the LED 41 is irradiated forward through the outer lens 3 after passing through the optical member 5 and the reflecting portion 21 of the housing 2.
Specifically, among the light emitted from the LED 41 substantially radially forward, a part of the light that has passed through the three light-transmitting holes 51a,... .. Are incident on the three lens cut portions 52a,... Of the front plate portion 52 corresponding to the holes 51a,. Then, the light is refracted forward by the three lens cut portions 52 a,... And passes through the front plate portion 52, and then irradiated forward through the outer lens 3.
On the other hand, among the light emitted substantially radially from the LED 41 forward, except for a part of the light passing through the three light transmission holes 51a of the rear plate portion 51, the first reflecting surface of the rear plate portion 51 Reflected in the reflection direction X by 51b. The light is reflected forward by the plurality of second reflecting surfaces 21 a of the reflecting portion 21 of the housing 2 and then irradiated forward through the outer lens 3.

At this time, most of the light emitted from the LED 41 and incident on the first reflection surface 51b of the rear plate portion 51 is reflected in the reflection direction X as described above, but only a small part of the light is first. The light passes through the reflective film coated on the reflective surface 51b, and also passes through the rear plate portion 51 formed of a light transmitting member. Then, the slight light is irradiated forward through the outer lens 3 after passing through the plurality of through portions 52b of the front plate portion 52.
Further, at this time, the plurality of third reflecting surfaces 21b of the reflecting portion 21 of the housing 2 are surfaces substantially along the reflecting direction X, and therefore reflect the light reflected from the first reflecting surface 51b in the reflecting direction X. Although it is rarely caused, slight light (diffuse reflected light) in the lamp chamber is reflected forward and irradiated forward from the outer lens 3.

  As a result, relatively strong light is radiated forward from the three lens cut portions 52a of the optical member 5 and the plurality of second reflecting surfaces 21a of the housing 2, while these three lenses. .. And weaker light is emitted from the plurality of through-hole portions 52b,... And the plurality of third reflection surfaces 21b,... Positioned between the cut portions 52a,. That is, when the vehicular lamp 1 is viewed from the front, the light emission mode is such that portions that shine strongly and portions that shine lightly and weakly are alternately arranged throughout. Therefore, although the front portion of the reflecting portion 21 irradiated with the reflected light and the front portion of the optical member 5 irradiated with the non-reflected light that is not reflected are different in the presence or absence of reflection in the irradiation light path, A lighting feeling with a sense of unity as a whole can be obtained.

  As described above, according to the vehicular lamp 1 of the present embodiment, when the lamp is viewed from the front, the lens cut portion 52a of the front plate portion 52 and the second reflecting surface 21a of the reflecting portion 21 are relatively comparative. The portion that shines strongly and the portion that shines faintly due to the through portion 52 b of the front plate portion 52 and the third reflecting surface 21 b of the reflecting portion 21 are arranged in a light emitting manner along the reflection direction X. Therefore, the presence / absence of reflection in the irradiation light path between the front portion of the reflecting portion 21 irradiated with the reflected light and the front portion of the optical member 5 (front plate portion 52) irradiated with the non-reflected light that does not undergo reflection is determined. Despite being different, a lighting feeling with a sense of unity as a whole can be obtained.

  In addition, since the distribution modes in the reflection direction X of the plurality of second reflecting surfaces 21a,... Of the reflecting portion 21 and the three lens cut portions 52a,. A lighting feeling with a sense of unity can be obtained between the front portion of the optical member 5 and the front portion of the optical member 5 (front plate portion 52).

  Further, since the LED (light emitting diode) 41 with relatively little heat generation is used as the light source, the optical member 5 can be disposed close to the LED 41. Accordingly, the solid angle (that is, the irradiation range) of the light incident on the first reflecting surface 51b of the rear plate portion 51 from the LED 41 is further increased, and the light transmission holes 51a,. As a result, the luminous flux utilization factor can be improved.

  The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above embodiment, the vehicular lamp 1 is a tail lamp provided at the rear of the vehicle, but the present invention can be widely applied to various vehicular lamps other than the tail lamp.

  Further, the plurality of second reflecting surfaces 21a,... And the three lens cut portions 52a,... Are formed so that their vertical width and interval change continuously when viewed from the front. However, it is only necessary that the distribution modes in the reflection direction X correspond to each other. For example, they may be formed so as to be distributed at substantially equal intervals along the reflection direction X.

The light reflection direction X by the first reflecting surface 51b is not particularly limited as long as it is a direction that intersects the front-rear direction.
Further, the numbers of the light transmission holes 51a and the lens cut portions 52a are not particularly limited, and may not be three.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Housing 21 Reflecting part 21a Second reflecting surface 21b Third reflecting surface 4 Light source unit 41 LED (light source)
5 Optical member 51 Rear plate part (reflection light transmission part)
51a Light transmission hole 51b First reflecting surface 52 Front plate part (lens part)
52a Lens cut part (lens cut)
52b Through portion X Reflection direction

Claims (4)

A light source that emits light substantially radially forward,
Provided in front of the light source, while allowing a part of the light emitted from the light source to pass therethrough, the light other than the part of the light is reflected in a predetermined reflection direction intersecting the front-rear direction. A reflective light transmission part;
A lens unit that is provided in front of the reflective light transmitting unit and transmits the light that has passed through the reflective light transmitting unit forward;
A reflection part that is provided in a position of the reflection light transmission part in the reflection direction and that is adjacent to or partially overlaps with the lens part when viewed from the front, and that reflects the light reflected by the reflection light transmission part; ,
With
The reflective light transmitting portion is formed of a light transmissive material, and a light transmitting hole through which the part of light passes, and a first reflective surface that is coated with a reflective film and reflects the other light in the reflection direction. And
The lens unit has a lens cut that transmits the part of the light that has passed through the light transmitting hole of the reflective light transmitting unit while refracting the light forward.
The reflecting portion includes a second reflecting surface that reflects light reflected by the first reflecting surface of the reflecting light transmitting portion forward, and the reflection direction of the second reflecting surface and substantially along the reflecting direction. A vehicular lamp characterized by having a third reflecting surface facing forward. The lens portion has a plurality of the lens cuts substantially along the reflection direction,
The reflection portion is formed in a stepped shape that is stepwise positioned in a front direction perpendicular to the reflection direction as it is separated from the reflection light transmission portion substantially along the reflection direction, and is a step surface thereof. A plurality of the second reflection surfaces, and a plurality of the third reflection surfaces which are step surfaces,
2. The vehicular lamp according to claim 1, wherein the plurality of lens cuts and the plurality of second reflection surfaces correspond to each other in a distribution manner in the reflection direction.   The vehicular lamp according to claim 1 or 2, wherein the reflection light passing portion and the lens portion are integrally formed.   The vehicular lamp according to any one of claims 1 to 3, wherein the light source is a light emitting diode.

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