JP2014157692A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To functionalize multiple light guide lenses as an irradiation body while avoiding the use of a large lighting fixture.SOLUTION: A lighting fixture 1 emitting light comprises: a light source 12; multiple light guide lenses 2 and 3 for irradiation functioning as an irradiation body by making the light emitted from the light source 12 come to inside; and a light guide lens 4 for light distribution disposed between the light source 12 and the light guide lenses 2 and 3 for irradiation, and making the light emitted from the light source 12 divide and enter to the multiple light guide lenses 2 and 3 for irradiation.

Description

  The present invention relates to a lamp.

  Conventionally, for example, a light guide lens 100 as shown in FIG. 5 is used for a lamp such as a vehicle. In such a light guide lens 100, the light emitted from the light source 101 is incident from the incident surface 102 and transmitted to the inside, so that the light guide lens 100 itself functions as an irradiator (for example, a patent). References 1 and 2).

JP 2010-225388 A Japanese Patent No. 4458359

  However, in the conventional lamp in which the light guide lens 100 functions as an illuminator, since one light guide lens 100 uses at least one light source 101, the number of components increases according to the number of the light guide lenses 100, and the lamp Will become larger.

  SUMMARY An advantage of some aspects of the invention is that it provides a lamp capable of causing a plurality of light guide lenses to function as an irradiating body while preventing an increase in size.

In order to solve the above problem, the invention according to claim 1 is a lamp for irradiating light.
A light source;
A plurality of light guide lenses for irradiation functioning as an irradiator by transmitting light emitted from the light source to the inside;
A light distribution light guide lens disposed between the light source and the irradiation light guide lens, and splitting the light emitted from the light source and entering each of the plurality of irradiation light guide lenses;
It is characterized by providing.

The invention according to claim 2 is the lamp according to claim 1,
The light guide lens for light distribution is
While making the light emitted from the light source into parallel light, an incident surface that enters the light distribution light guide lens; and
A plurality of split reflection surfaces provided in the opposite portion of the incident surface, and internally reflecting the light incident from the incident surface into the light distribution lens for light distribution in a plurality of directions;
A plurality of emission surfaces that emit light divided in a plurality of directions by the plurality of divided reflection surfaces and are incident on the plurality of irradiation light guide lenses, respectively;
It is characterized by having.

The invention according to claim 3 is the lamp according to claim 1 or 2,
A plurality of the light sources;
The light guide lens for light distribution is
The light emitted from the plurality of light sources is divided and incident on the plurality of irradiation light guide lenses.

  According to the first aspect of the present invention, the light distribution light guide lens is disposed between the light source and the plurality of light guide lenses for irradiation functioning as an irradiator, and divides the light emitted from the light source. Therefore, the plurality of irradiation light guide lenses can be irradiated with one light source. Therefore, a plurality of light guide lenses for irradiation can be made to function as an irradiation body while preventing an increase in size.

It is a front view which shows a lamp. It is a figure which shows the internal structure of a lamp, (a) is a front view, (b) is a perspective view. It is sectional drawing of a lamp. It is a figure which shows the positional relationship of the output surface of the light guide lens for light distribution, and the entrance surface of the light guide lens for irradiation. It is a front view which shows the conventional lamp.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples. In the following description, “up”, “down”, “front”, “back”, “left”, and “right” are “up” and “down” of vehicles equipped with vehicle lamps, respectively. , “Front”, “back”, “left”, “right”. Accordingly, the left and right directions are determined by looking from the back to the front (from the viewpoint of the driver).

<Configuration of lamp>
FIG. 1 is a front view showing a vehicular lamp 1 according to the present embodiment.
As shown in this figure, the lamp 1 includes two irradiation light guide lenses 2 and 3 behind (inner side) the outer lens 10.

  As shown in FIG. 2, the irradiation light guide lens 2 is formed in a substantially arc shape that rises to the right in a front view, and has two projecting portions 21 and 22 projecting downward at a lower end portion.

  As shown in FIGS. 2 and 3, these protrusions 21 and 22 are arranged side by side and have incident surfaces 210 and 220 on the rear surface and reflecting surfaces 211 and 221 on the front surface.

Among these, the incident surfaces 210 and 220 are surfaces on which light from light sources 12 and 13 described later is incident.
The reflecting surfaces 211 and 221 are surfaces that internally reflect light incident on the irradiation light guide lens 2 from the incident surfaces 210 and 220 toward the upper portion of the irradiation light guide lens 2.

  The irradiation light guide lens 2 described above functions as an irradiator by transmitting light incident from the incident surfaces 210 and 220 to the inside.

  As shown in FIG. 2, the irradiation light guide lens 3 is formed in a substantially annular shape when viewed from the front, and has two projecting portions 31 and 32 projecting downward at the lower end portion.

  As shown in FIGS. 2 and 3, these protrusions 31 and 32 are arranged side by side and have incident surfaces 310 and 320 on the front surface and reflecting surfaces 311 and 321 on the rear surface.

Among these, the incident surfaces 310 and 320 are surfaces on which light from light sources 12 and 13 described later is incident.
The reflection surfaces 311 and 321 are surfaces that internally reflect light incident on the irradiation light guide lens 3 from the incident surfaces 310 and 320 toward the upper portion of the irradiation light guide lens 3.

  The irradiation light guide lens 3 described above functions as an irradiator by transmitting light incident from the incident surfaces 310 and 320 to the inside.

  These irradiation light guide lenses 2 and 3 are arranged close to each other so as to be adjacent to each other in the front-rear direction. More specifically, the incident surface 210 and the incident surface 310 face each other along the front-rear direction. And the incident surface 220 and the incident surface 320 are arrange | positioned so that it may oppose along the front-back direction.

  A light distribution light guide lens 4 is disposed between the incident surfaces 210 and 220 and the incident surfaces 310 and 320, and the light source 12 is disposed below the light distribution light guide lens 4. , 13 are arranged.

  Among these, the light sources 12 and 13 are disposed so as to be adjacent to each other in the left-right direction while facing upward.

  The light distribution light guide lens 4 is a lens that divides the light emitted from the light sources 12 and 13 and makes the light incident on the irradiation light guide lenses 2 and 3, respectively, on the optical path of the light from the light sources 12 and 13. It is in a state of being disposed between the light sources 12 and 13 and the light guide lenses 2 and 3 for irradiation.

  This light guide lens 4 for light distribution is formed long in the left-right direction, and includes two incident surfaces 40, four divided reflection surfaces 41, and four emission surfaces 43.

  As shown in FIG. 3, the two incident surfaces 40 have the light emitted from the light sources 12 and 13 in the direction of the optical axis Ax of the light sources 12 and 13 (hereinafter referred to as the optical axis direction. In the present embodiment). Is a surface that enters the light distribution light guide lens 4 while making parallel light in the vertical direction), and has a shape that bulges downward from the lower surface of the light distribution light guide lens 4. Of these two incident surfaces 40, one incident surface 40 (hereinafter also referred to as an incident surface 40A) is provided to face the light source 12, and the other incident surface 40 (hereinafter also referred to as an incident surface 40B) is provided. It is provided facing the light source 13.

  As shown in FIGS. 2 and 3, the four split reflection surfaces 41 are surfaces that internally reflect the light that has entered the light distribution light-guiding lens 4 from the incident surface 40 in a plurality of directions. .

  Here, in the present embodiment, of the four divided reflecting surfaces 41, two divided reflecting surfaces 41 (hereinafter also referred to as divided reflecting surfaces 41A and 41B) are the upper surfaces of the light distribution light guide lens 4. It is provided at a portion facing the incident surface 40A (that is, a portion facing the light source 12). These divided reflection surfaces 41A and 41B are formed in pairs with a plane that includes the optical axis Ax of the light source 12 and is orthogonal to the front-rear direction. More specifically, the divided reflection surfaces 41A and 41B are individually inclined to both sides in the front-rear direction at an angle of 45 degrees with respect to the above-described boundary surface, and are formed to be positioned upward as they move away from the boundary surface in the front-rear direction. ing. Accordingly, each of the divided reflection surfaces 41A and 41B is configured to internally reflect the light incident from the incident surface 40A while dividing the light into two front and rear directions, and more specifically, the light incident from the incident surface 40A. The partial reflection surface 41A internally reflects a part of the light, and the partial reflection surface 41B internally reflects the other part of the light incident from the incident surface 40A backward.

  Of the four divided reflecting surfaces 41, the other two divided reflecting surfaces 41 (hereinafter also referred to as divided reflecting surfaces 41C and 41D) are portions of the upper surface of the light distribution light guide lens 4 that face the incident surface 40B. (In other words, it is provided at the portion facing the light source 13). These divided reflection surfaces 41C and 41D are formed in pairs with a plane that includes the optical axis Ax of the light source 13 and is orthogonal to the front-rear direction. More specifically, the divided reflection surfaces 41C and 41D are individually inclined to both sides in the front-rear direction at an angle of 45 degrees with respect to the above-described boundary surface, and are formed so as to be positioned upward as they move away from the boundary surface in the front-rear direction. ing. Accordingly, each of the divided reflection surfaces 41C and 41D is configured to internally reflect the light incident from the incident surface 40B while dividing the light into two front and rear directions, and more specifically, the light incident from the incident surface 40B. The partial reflection surface 41C internally reflects a part of the light, and the partial reflection surface 41D internally reflects the other part of the light incident from the incident surface 40B backward.

  The four exit surfaces 43 are surfaces that emit light divided in a plurality of directions by the four divided reflection surfaces 41 to the outside of the light distribution light guide lens 4 and enter the light guide lenses 2 and 3 for irradiation. In the present embodiment, it is a plane orthogonal to the direction of internal reflection by the split reflection surface 41 (front-rear direction). Here, in the present embodiment, of the four exit surfaces 43, one exit surface 43 (hereinafter also referred to as the exit surface 43A) is a part of the divided reflection surface 41A among the front surfaces of the light distribution light guide lens 4. It is provided in a portion located in the front, and the light internally reflected forward by the divided reflection surface 41A is emitted and incident on the incident surface 210 of the light guide lens 2 for irradiation. Of the four exit surfaces 43, the other exit surface 43 (hereinafter also referred to as the exit surface 43B) is a portion of the rear surface of the light distribution light guide lens 4 that is positioned behind the split reflection surface 41B. The light that is internally reflected backward by the divided reflection surface 41 </ b> B is emitted and incident on the incident surface 310 of the light guide lens 3 for irradiation. Of the four exit surfaces 43, the other exit surface 43 (hereinafter also referred to as the exit surface 43C) is a portion of the front surface of the light distribution light guide lens 4 that is located in front of the split reflection surface 41C. The light that is internally reflected forward by the divided reflection surface 41 </ b> C is emitted and incident on the incident surface 220 of the light guide lens 2 for irradiation. Of the four exit surfaces 43, the other exit surface 43 (hereinafter also referred to as an exit surface 43 </ b> D) is a portion of the rear surface of the light distribution light guide lens 4 that is located behind the split reflection surface 41 </ b> D. The light internally reflected backward by the divided reflection surface 41D is emitted, and is incident on the incident surface 320 of the light guide lens 3 for irradiation.

<Action and effect>
Then, the effect of the lamp 1 is demonstrated.

  First, when the light source 12 (or the light source 13) is turned on, the light enters the light distribution light guide lens 4 from the incident surface 40A (or the incident surface 40B). At this time, the light from the light source 12 (or the light source 13) is parallel light substantially along the optical axis direction (vertical direction).

  Next, the light that has entered the light distribution light guide lens 4 is divided into the front and rear direction sides by a pair of divided reflection surfaces 41A and 41B (or divided reflection surfaces 41C and 41D), and the emission surfaces 43A and 43B ( Or it is internally reflected so that it may inject into the output surfaces 43C and 43D).

  Next, the light internally reflected by the divided reflection surfaces 41A and 41B (or the divided reflection surfaces 41C and 41D) is emitted from the emission surfaces 43A and 43B (or the emission surfaces 43C and 43D), and is incident on the incident surface 210 (or the incident surface). 220) enters the illumination light guide lens 2 and enters the illumination light guide lens 3 from the entrance surface 310 (or the entrance surface 320).

  Then, the light incident on the irradiation light guide lens 2 from the incident surface 210 (or the incident surface 220) is internally reflected by the reflecting surface 211 (or the reflecting surface 221) and transmitted to the inside of the irradiation light guide lens 2, resulting in irradiation. The light guide lens 2 functions as an irradiation body. Similarly, the light incident on the irradiation light guide lens 3 from the incident surface 310 (or the incident surface 320) is internally reflected by the reflection surface 311 (or the reflection surface 321) and transmitted to the inside of the irradiation light guide lens 3. The light guide lens 3 for irradiation functions as an irradiation body. The light emitted from the light source 12 (or the light source 13) may cause the left part (or right part) of the irradiation light guide lenses 2 and 3 to function as an irradiation body. It is good also as making 3 whole function as an irradiation body. In the latter case, the brightness of the light guide lenses 2 and 3 for irradiation is changed step by step when one of the light sources 12 and 13 is turned on and when both are turned on.

  As described above, according to the lamp 1, the light distribution light guide lens 4 is disposed between the two light guide lenses 2 and 3 that function as an irradiation body and the light source 12 (or the light source 13). Since the light emitted from the light source 12 (or the light source 13) is divided and incident on the irradiation light guide lenses 2 and 3, respectively, the two irradiation light guide lenses 2 and 3 are combined into one light source 12 (or light source 13). ). Therefore, the two light guiding lenses 2 and 3 for irradiation can be functioned as an irradiation body while preventing an increase in size.

  It should be noted that the present invention should not be construed as being limited to the above-described embodiment, and of course can be modified or improved as appropriate.

  For example, in the above embodiment, as illustrated in FIG. 4A, it has been described that the emission surface 43 is provided so as to be orthogonal to the direction of internal reflection (front-rear direction) by the divided reflection surface 41. As shown in (b), the exit surface 43 may be provided so as to intersect the direction of internal reflection. Furthermore, as shown in FIG. 4C, a plurality of emission surfaces 43 may be provided at both ends of the light distribution light guide lens 4 so as to intersect the direction of internal reflection. Here, in the case of FIGS. 4B and 4C, the incident surfaces 210 and 220 (or the incident surfaces 310 and 320) of the irradiation light guide lens 2 (or the irradiation light guide lens 3) are used for light distribution. The light guide lens 4 can be offset from the central axis. Further, in the case of FIG. 4C, the light incident from the light source 12 and internally reflected by the two split reflection surfaces 41 is applied to the four incident surfaces 210 and 220 of the two irradiation light guide lenses 2 and 3. , 310 and 320 (or four incident surfaces of three or more light guide lenses for irradiation).

  Further, the light internally reflected by the divided reflection surface 41 has been described as being emitted from the emission surface 43. However, the light internally reflected by the division reflection surface 41 is further reflected by another reflection surface in the light guide lens 4 for light distribution. It is good also as making it radiate | emit from the output surface 43, after making it reflect internally.

DESCRIPTION OF SYMBOLS 1 Lamp 2,3 Light guide lens for irradiation 4 Light guide lens for light distribution 40, 40A, 40B Incidence surface 41, 41A-41D Split reflection surface 43, 43A-43D Output surface

Claims (3)

In lamps that emit light,
A light source;
A plurality of light guide lenses for irradiation functioning as an irradiator by transmitting light emitted from the light source to the inside;
A light distribution light guide lens disposed between the light source and the irradiation light guide lens, and splitting the light emitted from the light source and entering each of the plurality of irradiation light guide lenses;
A lamp characterized by comprising. The lamp according to claim 1,
The light guide lens for light distribution is
While making the light emitted from the light source into parallel light, an incident surface that enters the light distribution light guide lens; and
A plurality of split reflection surfaces provided in the opposite portion of the incident surface, and internally reflecting the light incident from the incident surface into the light distribution lens for light distribution in a plurality of directions;
A plurality of emission surfaces that emit light divided in a plurality of directions by the plurality of divided reflection surfaces and are incident on the plurality of irradiation light guide lenses, respectively;
The lamp characterized by having. The lamp according to claim 1 or 2,
A plurality of the light sources;
The light guide lens for light distribution is
A lamp characterized in that light emitted from the plurality of light sources is divided and incident on the plurality of irradiation light guide lenses.

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