JP2011025820A - Vehicular lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for improving the visibility of at least one lamp unit among a plurality of lamp units with different functions constituting a vehicular lighting fixture without enlarging the vehicular lighting fixture. <P>SOLUTION: The vehicular lighting fixture 1 includes a first projector lamp unit 10 having a fog lamp function and a second projector lamp unit 20 having a DRL function. Part L<SB>21</SB>of light emitted from an LED light source 21 of the second lamp unit 20 is guided in a projector lens 27 of the second lamp unit 20 and emitted to the outside from the inside of the projector lens 27, and part L<SB>22</SB>of the light is guided in a projector lens 17 of the first lamp unit 10 and emitted to the outside of the projector lens 17. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicular lamp composed of a plurality of lamp units having different functions, and more specifically, an optical member constituting a light distribution control optical system of one lamp unit of adjacent lamp units having different functions. The present invention relates to a vehicular lamp used as one of optical members constituting a light distribution control optical system of the other lamp unit.

  As for the vehicular lamp composed of a plurality of lamp units having different functions as described above, for example, one having a configuration as shown in FIG. 10 has been proposed.

  This relates to an ornament lamp 50 provided at the front center of a vehicle such as a bus. The ornament lamp 50 is composed of a company name indicator lamp 51 and an illumination lamp 52, and a first housing constituting the company name indicator lamp 51. 51a and the second housing 52a constituting the illumination lamp 52 are integrally formed, and similarly, the first lens 51b constituting the company name display lamp 51 and the second lens 52b constituting the illumination lamp 52 are integrally formed. .

  That is, the ornament lamp 50 is provided with a company name display lamp 51 having a company name display function and an illumination lamp 52 having a DRL (Daytime Running Lamp) function, for example (see, for example, Patent Document 1).

JP 2005-1577 A

  By the way, in the ornament lamp 50 having the above-described configuration, in order to improve the functionality of the DRL by the illumination lamp 52, visibility is increased by expanding the emission area of the light emitted from the second lens 52b of the illumination lamp 52 to the outside. It is conceivable to take a technique such as increasing

  However, it is necessary to increase the size of the light source portion 52c of the illumination lamp 52 in order to realize the expansion of the light emission area in the second lens 52b, and as a result, the entire ornament lamp 50 is increased in size. Become.

  Accordingly, the present invention was devised in view of the above problems, and the object of the present invention is to provide a vehicular lamp composed of a plurality of lamp units having different functions, without increasing the size of the vehicular lamp. An object of the present invention is to provide a method capable of improving the visibility of at least one lamp unit.

In order to solve the above-mentioned problem, in the invention described in claim 1 of the present invention, a first lamp unit and a second lamp unit having different irradiation areas are arranged adjacent to each other, and the plurality of lamp units are:
An LED light source, a lens positioned on the optical axis of the LED light source in the longitudinal direction of the vehicle, and an optical member including a lens holder that is positioned on a side surface of the first lamp unit and the second lamp unit and supports the lens. A gap is provided in a part of the lens holder, and a gap in a part of the lens holder of the first lamp unit and the second lamp unit is located in the vicinity of the optical lamp of the first lamp unit. The member is used as an optical member constituting the light distribution control optical system of the second lamp unit.

  According to a second aspect of the present invention, in the first aspect, the lens is a convex projection lens.

  Further, in the invention described in claim 3 of the present invention, in any one of claim 1 or 2, the first lamp unit is a lamp unit having a fog lamp function, and the second lamp unit is a DRL function. It is a lamp unit which has.

  According to a fourth aspect of the present invention, in the first aspect, the lens holder of the first lamp unit is provided with a reflecting surface.

  According to the present invention, a vehicular lamp is composed of a plurality of lamp units having different functions, and light distribution control of the first lamp unit is performed in the adjacent first lamp unit and second lamp unit having different functions among the plurality of lamp units. The optical member constituting the optical system is used as one of the optical members constituting the light distribution control optical system of the second lamp unit.

  As a result, at least the visibility of the second lamp unit can be improved without increasing the size of the vehicular lamp.

The structure explanatory view of the embodiment concerning the present invention. It is optical system explanatory drawing of embodiment concerning this invention. It is front explanatory drawing which concerns on FIG. It is optical system explanatory drawing of embodiment concerning this invention. It is front explanatory drawing which concerns on FIG. It is optical system explanatory drawing of embodiment concerning this invention. It is front explanatory drawing which concerns on FIG. The structure explanatory view of other embodiments concerning the present invention. The structure explanatory view of other embodiments concerning the present invention. It is explanatory drawing of a prior art example.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9 (the same reference numerals are given to the same portions). The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. Unless stated to the effect, the present invention is not limited to these embodiments.

  1 is a diagram illustrating the configuration of an embodiment according to the present invention, FIG. 2 is a diagram illustrating an optical system according to the embodiment, FIG. 3 is a diagram illustrating a front according to FIG. 2, FIG. 4 is a diagram illustrating an optical system according to the embodiment, and FIG. 4 is an explanatory front view of the optical system according to the embodiment. FIG. 7 is an explanatory front view of the optical system according to FIG. 8 and 9 are explanatory diagrams of the configuration of another embodiment.

  As shown in FIG. 1, a vehicular lamp 1 according to the present embodiment includes a lamp unit 10 having a fog lamp function (hereinafter referred to as a first lamp unit) 10 and a lamp unit having a DRL function (hereinafter referred to as a second lamp unit). The lamp units 10 and 20 are arranged in the lamp chamber 4 formed by the outer lens 2 and the housing 3 so as to be close to each other.

  The positional relationship between the first lamp unit 10 and the second lamp unit 20 is such that when the vehicular lamp 1 is mounted on a vehicle, the first lamp unit 10 having a fog lamp function is on the upper side, and the second lamp unit 20 has a DRL function. Is arranged in the vertical direction so as to be located on the lower side.

  Among these, the 1st lamp unit 10 is what is called a projector type lamp unit, and makes a light emission source LED. Specifically, the LED mounting substrate 12 on which the LED light source 11 is mounted is mounted on a main body 13 of a heat sink 15 including a main body 13 and a plurality of heat radiation fins 14. Similarly, a lens holder 16 connected to the main body 13. A convex projection lens 17 supported by the LED light source 11 is positioned in front of the irradiation direction of the LED light source 11.

  On the other hand, the second lamp unit 20 is also a projector-type lamp unit, similar to the first lamp unit 10, and uses a light emitting source as an LED. Specifically, an LED mounting substrate 22 on which an LED light source 21 is mounted is mounted on a main body 23 of a heat sink 25 including a main body 23 and a plurality of radiating fins 24, and similarly, a lens holder 26 connected to the main body 23. The projection lens 27 supported by the LED light source 21 is positioned in front of the irradiation direction of the LED light source 21.

Optical axes of the projection lens 17 of the LED light source 11 of the first lamp unit 10 is located on the same straight line X _1, optical axes of the projection lens 27 of the LED light source 21 of the second lamp unit 20 is the same located on line X _2, the straight line X ₁ and the line X ₂ are parallel to each other.

  Since there is a gap between the first lamp unit 10 and the second lamp unit 20, and the outer lens 2 and the housing 3, the extension 5 is disposed so as to close the gap. When the interior of the lamp chamber 4 is viewed from the front or obliquely forward through the outer lens 2, the housing 3 located behind and to the sides of the first lamp unit 10 and the second lamp unit 20 is shielded from view. . In other words, the extension 5 enhances the blinding effect of the built-in objects to improve the appearance and enhance the merchantability.

  Further, at least the surface of the extension 5 viewed through the outer lens 2 is subjected to a metallic shine treatment such as chrome plating, which contributes to securing an aesthetic appearance.

  Incidentally, the first lamp unit 10 and the second lamp unit 20 are arranged close to each other as described above, and the projection lenses 17 and 27 and the lens holders 16 and 26 are also arranged close to each other. Yes.

  In the vicinity of the first lamp unit 10 and the second lamp unit 20, a gap 18 is provided between the lens holder 16 and the projection lens 17, and similarly, a gap 28 is provided between the lens holder 26 and the projection lens 27. It has been. That is, it is provided at a position near the gap 18 and the gap 28.

  The optical system of the vehicular lamp 1 related to the gap 18 and the gap 28 will be described below with reference to FIGS.

The first lamp unit 10 has a fog lamp function as described above. When the LED light source 11 is turned on, the light L ₁ emitted from the LED light source 11 passes through the lens holder 16 and is projected as shown in FIG. reaches the light incident surface 17a of the lens 17, is guided through the projection lens 17 are incident from the light incident surface 17a in the projection lens 17 is emitted from the light emitting surface 17b, the outgoing light L ₁ is located in front The light passes through the outer lens 2 and is irradiated toward the front of the vehicular lamp 1.

  As a result, when viewed from the front or obliquely forward through the outer lens 2, the light is irradiated from the region B of almost the entire light exit surface 17 b of the projection lens 17 of the first lamp unit 10 as shown in FIG. 3. Is confirmed

  At this time, the light distribution characteristics of the fog lamp are the distance between the LED light source 11 and the projection lens 17, the material (refractive index) forming the projection lens 17, the shapes of the light incident surface 17a and the light exit surface 17b of the projection lens 17, and the like. It depends on the optical element. In other words, these optical elements are optically set based on the light distribution characteristics required for the fog lamp (see FIG. 2).

On the other hand, in the second lamp unit 20 having the DRL function, when the LED light source 21 is turned on, a part of the light L ₂₁ emitted from the LED light source 21 passes through the lens holder 26 as shown in FIG. to reach the light incident surface 27a of the projection lens 27, is guided to the light incident surface 27a projection lens 27 and enters the projection lens 27 from being emitted from the light emitting surface 27b, the outgoing light L ₂₁ is the front The light passes through the outer lens 2 positioned at the front and is irradiated toward the front of the vehicle lamp 1.

At the same time, part of the light L ₂₂ emitted from the LED light source 21 passes through the lens holder 26 and further passes through the gap 28 and the gap 18, and the projection lens 17 of the adjacent first lamp unit 10 Directly reaches the light incident surface 17a.

Then, the light L ₂₂ incident on the projection lens 17 from the light incident surface 17a is guided through the projection lens 17 while being repeatedly reflected (total reflection) and emitted from the light emitting surface 17b, and the emitted light L ₂₂ is directed to the front surface. The light passes through the outer lens 2 and is irradiated toward the front of the vehicular lamp 1.

As a result, the lights L ₂₁ and L ₂₂ emitted from the LED light source 21 of the second lamp unit 20 are branched and emitted from both the projection lens 17 and the projection lens 27. When this is viewing from the front or obliquely forward through the outer lens 2, as shown in FIG. 5, substantially projected entire area A ₁ and the first lamp unit 10 of the light emitting surface 27b of the projection lens 27 of the second lamp unit 20 It is confirmed that the light is irradiated from two regions A ₂ of the partial region A ₂ of the light exit surface 17 b of the lens 17.

  Therefore, when the vehicle running with the DRL turned on in the daytime is viewed from the driver or pedestrian of the oncoming vehicle, only the light emitted from the conventional DRL lamp can be visually recognized. By doing so, the irradiation light from the DRL lamp and the irradiation light from a partial region of the fob lamp are visually recognized.

As a result, the apparent area of the DRL lamp is increased as compared with the conventional case, so that the visibility is improved and the traffic safety is improved. Further, the light L ₂₂ emitted from the LED light source 21 of the second lamp unit 20 having the DRL function, which is located below the first lamp unit 10 having the fog lamp function, moves forward from a position higher than that of the second lamp unit 20. Therefore, the visibility is also improved.

  In this case as well, as with the first lamp unit 10, the light distribution characteristics of the DRL lamp are the distance between the LED light source 21 and the projection lens 27, the material forming the projection lens 27 (refractive index), and the light of the projection lens 27. It is determined by optical elements such as the shapes of the entrance surface 27a and the light exit surface 27b. In other words, these optical elements are optically set based on the light distribution characteristics required for the DRL lamp (see FIG. 4).

Further, when both the LED light source 11 of the first lamp unit 10 and the LED light source 21 of the second lamp unit 20 are turned on, the light is emitted from the LED light source 21 from the projection lens 27 of the second lamp unit 20 as shown in FIG. A part of the light L ₂₁ out of the light is emitted to the outside, and _{one of} the light L ₁ emitted from the LED light source 11 and the light emitted from the LED light source 21 from the projection lens 17 of the first lamp unit 10. Part of the light L ₂₂ is superimposed and emitted to the outside.

When viewed from the front or obliquely forward through the outer lens 2, as shown in FIG. 7, the projection of the first lamp unit 10 and the area A ₁ on the almost entire surface of the light exit surface 27 b of the projection lens 27 of the second lamp unit 20. that light is also substantially from a portion of the area a ₂ of the light emitting surface 17b of the projection lens 17 with the light from the two regions of the entire region B is irradiated on the light emission surface 17b of the lens 17 is irradiated It is confirmed.

As a result, a part of the light L ₂₂ of the light emitted from the LED light source 21 of the second lamp unit 20 is superimposed on the light L ₁ emitted from the LED light source 11 of the first lamp unit 10 to serve as a fog lamp. The amount of irradiation light increases, the fog lamp function is enhanced, and further safety during daytime driving in fog can be ensured (see FIG. 6).

Incidentally, as shown in FIG. 8, out of the light that is irradiated from the LED light source 21 of the second lamp unit 20 and is guided while being totally reflected in the projection lens 17 of the first lamp unit 10, the light is projected from the projection lens 17 into the lamp. leaking light L ₂₂ effectively form a slope as fog height of a portion of the (first lamp unit 10) of the lens holder 16 is changed to take advantage of, and may be provided with a reflecting surface 16a on the slope.

The light L ₂₂ reflected by the reflecting surface 16 a returns to the projection lens 17, is totally reflected in the projection lens 17, is guided, and is emitted from the projection lens 17.

  As a result, utilization efficiency of light emitted from the LED light sources 11 and 21 is improved, and a bright vehicle lamp is realized by increasing the amount of irradiation light.

Further, as shown in FIG. 9, the light emitted from the second lamp unit 20 is applied to the outer surface of the lens holder 16 of the first lamp unit 10 at the position where the first lamp unit 10 and the second lamp unit 20 face each other. reflected, it may be a reflective surface 16b so as to irradiate parallel light L _23.

For example, by light L ₂₃ that is reflected is incident on the projection lens 17 by the reflecting surface 16b is provided with a reflecting surface 16b at a position where it irradiates the high position as shown is refracted by the projection lens 17, projection lens 17 The light L ₂₃ emitted from the light irradiates a wide area, and the light is irradiated to a wider area compared to other embodiments of the present application, and the visibility of the DRL is further improved. .

  In the present embodiment, the first lamp unit 10 is described as the upper position, and the second lamp unit 20 is defined as the lower position. However, in the present invention, the first and second lamp units need only be adjacent to each other. Therefore, the first lamp unit may be on the lower side and the second lamp unit may be on the upper side, or may be arranged in the left-right direction.

  In this embodiment, the vehicular lamp is composed of two lamp units each having a fog lamp function and a DRL function. However, a combination of two lamp units having different lamp functions, or three or more different lamps. You may comprise by the combination of the lamp unit which has a function.

  The projector-type lamp unit is not limited to a combination of projector-type lamp units, and may be a combination of a projector-type lamp unit and a lamp unit other than the project type. For example, a combination of a projector-type lamp unit and a multi-reflector-type lamp unit, etc. Is also possible.

  As described above, according to the present invention, in a vehicular lamp composed of a plurality of lamp units having different functions, one lamp unit (the first lamp unit in the embodiment) of adjacent lamp units having different functions is arranged. An optical member (projection lens and lens holder in the embodiment) constituting the light control optical system is an optical member (projection lens and lens holder) constituting the light distribution control optical system of the other lamp unit (second lamp unit in the embodiment). The lens holder is used as one of the lens holders.

  As a result, the visibility of the other lamp unit (second lamp unit) is improved, the lamp function (fog lamp function) is enhanced, and support for safe driving can be ensured.

  Furthermore, the LED mounting substrate on which the LED light source is mounted is attached to a heat sink for heat dissipation, and heat generated when the LED light source is turned on is dissipated from the heat sink.

  As a result, an increase in temperature when the LED light source is turned on is suppressed, a decrease in light emission efficiency is suppressed, and a predetermined irradiation light quantity can be secured.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Outer lens 3 Housing 4 Light chamber 5 Extension 10 1st lamp unit 11 LED light source 12 LED mounting board 13 Main body 14 Heat radiation fin 15 Heat sink 16 Lens holder 16a Reflecting surface 16b Reflecting surface 17 Projecting lens 17a Light incident surface 17b Light exit surface 18 Gap 20 Second lamp unit 21 LED light source 22 LED mounting substrate 23 Main body 24 Heat radiation fin 25 Heat sink 26 Lens holder 27 Projection lens 27a Light incident surface 27b Light emission surface 28 Gap

Claims (4)

A first lamp unit and a second lamp unit having different irradiation areas are disposed adjacent to each other, and the plurality of lamp units are:
An LED light source;
A lens located on the optical axis in the vehicle longitudinal direction of the LED light source;
A vehicular lamp configured by an optical member provided with a lens holder that supports a lens, located on a side surface of the first lamp unit and the second lamp unit,
A gap is provided in a part of the lens holder, a gap between a part of the lens holders of the first lamp unit and the second lamp unit is located in the vicinity, and an optical member of the first lamp unit is provided in the second lamp unit. A vehicular lamp characterized by being used as an optical member constituting a light distribution control optical system.   The vehicular lamp according to claim 1, wherein the lens is a convex projection lens.   3. The vehicle lamp according to claim 1, wherein the first lamp unit is a lamp unit having a fog lamp function, and the second lamp unit is a lamp unit having a DRL function. 4. .   The vehicular lamp according to claim 1, wherein the lens holder of the first lamp unit is provided with a reflecting surface.

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