JP2016054094A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture that includes a small number of light sources to be made compact, achieves irradiation with light even if one light source goes out, and suppresses irradiation of light to an inner panel on a vehicle inner side.SOLUTION: A vehicular lighting fixture according to the present invention comprises a lens, and a right-side light source and a left-side light source provided across the center of the optical axis of the lens, an incidence surface of the right-side light source being a leftward light distribution incidence surface which forms a leftward light distribution pattern, and an incidence surface of the left-side light source being a rightward light distribution incidence surface which forms a rightward light distribution pattern, wherein the leftward light distribution incidence surface is such that the lens inside on the center side of the optical axis forms the whole of the leftward light distribution pattern and the lens outside also forms substantially the same leftward light distribution pattern; and the rightward light distribution incidence surface is such that the lens inside on the center side of the optical axis forms the whole of the rightward light distribution pattern and the lens outside also forms substantially the same rightward light distribution pattern, the leftward light distribution pattern and rightward light distribution pattern are put one over the other overlapping each other nearby the center of the optical axis to form a distal light distribution pattern.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicular lamp.

  Conventionally, in a vehicular lamp including a plurality of semiconductor light emitting elements and a projection lens that irradiates light emitted from the plurality of semiconductor light emitting elements to the front of the vehicle, the projection lens performs a main light distribution control and a plurality of semiconductors. A plurality of incident surfaces associated with the light emitting element, and a single exit surface, each of the exit surfaces for emitting light incident on the projection lens from the plurality of entrance surfaces. There is known a vehicular lamp that partially overlaps an adjacent emission region (see Patent Document 1).

JP 2012-119172 A

In this Patent Document 1, specifically, 12 LEDs are used, the number of parts is high, the cost is high, and a long projection lens corresponding to these many LEDs is used. There is a problem that the lamp becomes large.
On the other hand, if an attempt is made to reduce the number of light sources and the number of parts and to reduce the size of the vehicular lamp, it becomes impossible to irradiate the light necessary for the vehicle to travel when the light source is cut off and stops lighting. There is a fear.

In recent years, many vehicular lamps are slanted (inclined) from the front side of the vehicle toward the rear side of the vehicle. In such vehicular lamps, a member such as an inner panel is provided near the inside of the lamp unit. Is often located.
And when the light from a lamp unit is irradiated to an inner panel etc., there exists a problem that the light is reflected by an inner panel etc. and becomes glare light.

  The present invention has been made in view of such circumstances, and is a vehicular lamp that has a small number of light sources and can be miniaturized. Even if one of the light sources is cut off, it can irradiate with light necessary for traveling and is provided inside the vehicle. An object of the present invention is to provide a vehicular lamp that suppresses light from being irradiated to a certain inner panel or the like.

The present invention is grasped by the following composition in order to achieve the above-mentioned object.
(1) The vehicular lamp according to the present invention includes a lens, and a right light source and a left light source provided with the optical axis center of the lens interposed therebetween, and an incident surface of the lens corresponding to the right light source has a distant distribution. A left-side light distribution incident surface that forms a left-side light distribution pattern of a light pattern, and an incident surface of the lens corresponding to the left light source is a right-side light distribution incident that forms a right-side light distribution pattern of the far-field light distribution pattern The left-side light distribution entrance surface is configured so that the inner side of the lens on the optical axis center side forms the entire left-side light distribution pattern with respect to the approximate center, and the outer side of the lens is substantially the same as the left side of the lens. The right-side light distribution entrance surface forms the entire right-side light distribution pattern with the inner side of the lens on the optical axis center side being substantially the center, and the outside of the lens. Also forms the right light distribution pattern substantially the same as the inside of the lens, and the left light distribution pattern and the right light distribution pattern are overlapped and superposed in the vicinity of the center of the optical axis, thereby distant light distribution. A pattern is formed.

(2) In the configuration of (1), the left-side light distribution pattern formed by the lens inner side of the left-side light distribution entrance surface and the left-side light distribution pattern formed by the lens outside of the left-side light distribution entrance surface The one of the left-side light distribution pattern includes the other left-side light distribution pattern, and the right-side light distribution pattern and the right-side light distribution incident surface formed by the inside of the lens of the right-side light distribution incident surface. The right-side light distribution pattern formed by the outside of the lens includes one of the right-side light distribution patterns including the other right-side light distribution pattern.

(3) In the configuration of (2), the light distribution pattern formed by the lens outer side of the left-side light distribution incident surface and the right-side light distribution incident surface is the light distribution pattern formed by the lens inner side. Includes.

(4) In any one configuration of the above (1) to (3), the connecting portion between the left-side light distribution entrance surface and the right-side light distribution entrance surface is connected without a step.

(5) In the configuration of any one of the above (1) to (4), the left-side light distribution incident surface is in the vicinity of a boundary between the lens inner side and the lens outer side of the left-side light distribution incident surface. The right light source is formed as a convex curved surface having a portion that protrudes most to the right light source side, and the light source axis of the right light source is positioned in the vicinity of the most protruding portion of the left-side light distribution entrance surface. The right-side light distribution entrance surface has a convex shape having a portion that protrudes most toward the left light source side in the vicinity of the boundary between the lens inner side and the lens outer side of the right-side light distribution entrance surface. The left light source is disposed so that the light irradiation axis of the left light source is positioned in the vicinity of the most protruding portion of the right-side light distribution entrance surface.

  According to the present invention, there is provided a vehicular lamp that has a small number of light sources and can be miniaturized. Even if one of the light sources is cut off, it can irradiate light necessary for traveling and irradiates light on an inner panel or the like inside the vehicle. It is possible to provide a vehicular lamp that suppresses this.

It is a top view of vehicles provided with the vehicular lamp concerning this embodiment. It is a perspective view of the lamp unit of the vehicle lamp which concerns on this embodiment. It is the perspective view which removed the cover from the lamp unit of FIG. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is the front view which removed the lens from FIG. 3 and was seen from the front. It is the reverse view which looked at the lens from the light source side. It is a figure for demonstrating what kind of light distribution pattern the light from a light source is light-distributed by the entrance plane, and is irradiated to the vehicle front side. It is a figure for demonstrating the light distribution control of the entrance plane for left-handed light distribution, and the light distribution state on a screen, (a) is a substantially half surface outside a lens, (b) is the remaining surface outside a lens, respectively. (C) is the figure which showed the case of the substantially half surface inside a lens, (d) is the figure of the remaining surface inside a lens. It is a figure for demonstrating the light distribution control of the incident surface for right side light distribution, and the light distribution state on a screen, (a) is a substantially half surface near the vehicle outer side outside a lens, respectively, (b) is a lens outer side. (C) is a diagram showing the case of a substantially half surface near the outside of the vehicle inside the lens, and (d) showing the case of the remaining surface inside the lens. It is the figure which showed the luminous intensity distribution of the light distribution pattern on a screen, respectively, (a) is the luminous intensity distribution of the left side light distribution pattern, (b) is the luminous intensity distribution of the right side light distribution pattern, (c) is a distant light distribution pattern. The light intensity distribution. It is a figure for demonstrating the state of the luminous intensity distribution of a distant light distribution pattern at the time of position offset by attachment of a light source, (a) when there is no offset, (b) is an offset in an up-down direction, respectively. In the case (c), there is an offset in the left-right direction.

  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. The same number is attached | subjected to the same element through the whole description of embodiment. In the embodiments and drawings, “front” and “rear” indicate “forward direction” and “reverse direction” of the vehicle, respectively, and “up”, “down”, “left” unless otherwise specified. "And" Right "respectively indicate directions viewed from the driver who gets on the vehicle.

The vehicular lamp according to the embodiment of the present invention is a vehicular lamp (101R, 101L) provided on the left and right in front of the vehicle 102 shown in FIG. 1, and only the left vehicular lamp 101L will be described below.
In the following, the vehicle lamp 101L is simply referred to as “vehicle lamp”.

  The vehicular lamp according to the present embodiment includes a housing (not shown) that opens to the front side of the vehicle and an outer lens (not shown) that is attached to the housing so as to cover the opening, and is formed by the housing and the outer lens. A lamp unit (see FIG. 2) and the like are disposed in the lamp chamber.

  FIG. 2 is a perspective view showing the lamp unit 10 of the vehicular lamp of the present embodiment. As shown in FIG. 2, the lamp unit 10 includes a cover 20, a heat sink 30, and a lens 40. .

3 is a perspective view showing the lamp unit 10 with the cover 20 of FIG. 2 removed, and FIG. 4 is a cross-sectional view taken along the line AA of FIG.
As shown in FIG. 4, a pair of flanges 41 a and 41 b in which through holes for passing screws 61 a and 61 b are formed are provided at both ends of the lens 40 in the vehicle width direction.

  On the other hand, a lens holder 50 is attached to the front side of the heat sink 30 with screws 62a and 62b, and a female screw structure for fixing the screws 61a and 61b to both ends of the lens holder 50 in the vehicle width direction. A pair of screw fixing portions 51a and 51b formed with (not shown) are provided.

  Therefore, the screws 61a and 61b are passed through the through holes of the flanges 41a and 41b, and the screws 61a and 61b are screwed into the screw fixing portions 51a and 51b of the lens holder 50, so that the lens 40 can be fixed to the lens holder 50. It has become.

  As shown in FIG. 4, the central portion of the lens holder 50 is a mounting portion 52 for mounting a light source, and an optical axis center Z extending from the lens origin O of the lens 40 to the front side of the vehicle. The left light source 70a and the right light source 70b are attached to the mounting portion 52 with a pair of left and right screws 63a and 63b, respectively.

(light source)
FIG. 5 is a front view in which the lens 40 of FIG. 3 is removed and the lens holder 50 is viewed from the front.
As shown in FIG. 5, both the left light source 70a and the right light source 70b include bodies 72a and 72b provided with electrical connectors 71a and 71b for supplying power.
And on the board | substrates 73a and 73b integrally provided in the bodies 72a and 72b, the light emitting chips 74a and 74b used as a light emission part are provided, respectively.

  The left light source 70a and the right light source 70b of the present embodiment are self-luminous semiconductor light sources such as LEDs and laser light sources, and the number and shape of the light emitting chips (LED chips) 74a and 74b are not particularly limited. The light emitting part may be formed by one light emitting chip, or a plurality of light emitting chips may be arranged to form the light emitting part.

  As can be seen from FIGS. 4 and 5, the body 72a is provided with a through hole through which the pair of screws 63a is passed, and similarly, the body 72b is also provided with a through hole through which the pair of screws 63b is passed.

  On the other hand, as can be seen from FIG. 4, the mounting portion 52 on which the light source of the lens holder 50 is mounted has a screw fixing portion in which a female screw structure corresponding to the pair of screws 63a and the pair of screws 63b is formed. Is provided.

  Therefore, by passing the screws 63a and 63b through the through holes of the bodies 72a and 72b and screwing the screws 63a and 63b to the corresponding screw fixing portions of the lens holder 50, the left light source 70a and the right light source 70b are respectively connected to the lens holder. 50 can be fixed.

(lens)
As shown in FIG. 4, the lens 40 includes an exit surface 42 that irradiates light toward the front side of the vehicle, and an entrance surface 43 through which light from the left light source 70 a and the right light source 70 b enters the lens 40. The surface 42 is formed as a composite quadric surface in which the cross sections are combined with a quadratic curve.

  On the other hand, the incident surface 43 includes an incident surface 43a corresponding to the left light source 70a located on the left side of the optical axis center Z of the lens 40 and an incident surface 43b corresponding to the right light source 70b located on the right side of the optical axis center Z. Become.

The incident surface 43a and the incident surface 43b are respectively formed as free-form surfaces, and as shown in FIG. 6 when the lens 40 is viewed from the left light source 70a and the right light source 70b side, the incident surface 43a and the incident surface 43b are connected. part 43c is no difference in level, are connected at a position contiguous ^{(C 0} grade continuous).

As shown in FIG. 6, in this embodiment, the incident surface 43a and the incident surface 43b are both gently convex curved surfaces so as to approach the left light source 70a and the right light source 70b.
In FIG. 6, the positions of the light emitting chips 74a and 74b (that is, the light emitting units) are schematically shown by squares.
As shown in FIG. 6, the light emitting chip 74a is located in the vicinity of the portion of the convex curved surface of the incident surface 43a that protrudes to the leftmost light source 70a side.
That is, the left light source 70a is disposed so that the light irradiation axis of the left light source 70a is positioned in the vicinity of the portion of the incident surface 43a that protrudes to the leftmost light source 70a side.

Similarly, the light emitting chip 74b is located in the vicinity of the portion of the convex curved surface of the incident surface 43b that protrudes to the rightmost light source 70b side.
That is, the right light source 70b is disposed so that the light irradiation axis of the right light source 70b is located in the vicinity of the portion of the incident surface 43b that protrudes to the rightmost light source 70b side.

  Hereinafter, how light from the left light source 70a (light emitting chip 74a) and right light source 70b (light emitting chip 74b) arranged as described above is controlled by the incident surface 43a and the incident surface 43b, respectively. Will be described in detail.

FIG. 7 is a diagram for explaining what kind of light distribution pattern the light from the left light source 70a and the right light source 70b is subjected to light distribution control on the incident surfaces 43a and 43b and is irradiated to the front side of the vehicle. .
7A and 7B schematically show the shapes of the exit surface 42 and the entrance surfaces 43a and 43b of the lens 40, the left light source 70a and the right light source. It is the figure which showed how the light which injected into the lens 40 is irradiated from the output surface 42 to the vehicle front side, when the light from 70b injects into the entrance surfaces 43a and 43b.

The upper diagram shows the light distribution state on the screen corresponding to the lower diagram, “VU-VD” indicates the vertical lines on the top and bottom of the screen, and “HL-HR” indicates the screen. The left and right horizontal lines are shown.
Hereinafter, in the drawings other than FIG. 7, when the screen is shown, “VU-VD” indicates the vertical line on the top and bottom of the screen, and “HL-HR” indicates the horizontal line on the left and right of the screen. .

  Further, in FIGS. 7A and 7B, the dotted arrow provided from the light emitted from the lens 40 toward the front side of the vehicle toward the lower end of the “VU-VD” line of the screen is This figure shows which light in the figure is irradiated in the vicinity of the “VU-VD” line.

As shown in FIG. 7A, the light from the left light source 70a is light-distributed by the incident surface 43a on the left side of the optical axis center Z, and is distributed to the right from the periphery of the “VU-VD” line on the screen. A light pattern is formed.
Thus, since the incident surface 43a is an incident surface that forms a right-side light distribution pattern, it will also be referred to as a right-side light distribution incident surface 43a.

On the other hand, as shown in FIG. 7B, the light from the right light source 70b is light-distributed and controlled by the incident surface 43b on the right side of the optical axis center Z, and from around the “VU-VD” line on the screen. A light distribution pattern on the left side is formed.
Thus, since the incident surface 43b is an incident surface that forms a left-side light distribution pattern, it is also referred to as a left-side light distribution incident surface 43b hereinafter.

  Here, since the incident surface 43b is positioned closer to the inner panel on the vehicle inner side than the incident surface 43a, the incident surface 43b is disposed on the outer side of the vehicle so that light is not irradiated to the inner panel on the inner side of the vehicle. The left-side light distribution entrance surface 43b is formed so as to form a light distribution.

On the other hand, the incident surface 43a on the side away from the inner panel on the inside of the vehicle does not easily hit the inner panel or the like even if the light is irradiated on the inner side of the vehicle. Thus, the incident surface 43a is a right-side light distribution incident surface 43a.
Therefore, it is possible to suppress the generation of glare light by irradiating the inner panel or the like with light.

  Next, the light distribution control of the left-side light distribution entrance surface 43b and the right-side light distribution entrance surface 43a will be described in further detail sequentially.

(Left-side incident surface for light distribution)
FIGS. 8A to 8D illustrate how the light from the right light source 70b is light-distributed by the left-side light-distribution incident surface 43b and is irradiated to the front side of the vehicle as a light distribution pattern. FIG.

  The upper and lower four views on the left side of FIGS. 8A to 8D schematically show the shapes of the exit surface 42 of the lens 40 and the left-side light distribution entrance surface 43b, and the light from the right light source 70b is shown. It is the figure which showed how the light which injected into the lens 40 is irradiated to the vehicle front side from the output surface when it injects into each part of the entrance plane 43b for the left side light distribution.

The upper and lower four diagrams on the right side of FIGS. 8A to 8D show the light distribution state on the screen corresponding to the left diagram.
The center of the screen (near the “VU-VD” line) hits the front side of the vehicular lamp, so that the left side of the screen hits the outside of the vehicular lamp. Since it hits the inside of the vehicle lamp, it may be described as inside (inside).

8 (a) and 8 (b) show a portion located on the inner side of the vehicle with respect to the approximate center of the left-side light distribution entrance surface 43b, that is, the right side of the lens outer 44b away from the optical axis center Z of the lens 40. The case where the light from the light source 70b injects is shown.
FIG. 8A shows a case where light is incident on substantially half of the lens outer side 44b closer to the vehicle inner side (side away from the optical axis center Z of the lens 40). FIG. 8B shows a case where light is incident on a substantially half surface of the lens outer side 44b on the vehicle outer side (optical axis center Z side of the lens 40).

On the other hand, FIG. 8C and FIG. 8D show a portion located outside the vehicle with reference to the approximate center of the left-side light distribution entrance surface 43b, that is, the lens inner side 44a that is the optical axis center Z side of the lens 40. The figure shows a case where light from the right light source 70b is incident.
FIG. 8C shows a case where light is incident on approximately half of the lens inner side 44a on the side closer to the vehicle inner side (side away from the optical axis center Z of the lens 40). FIG. 8D shows a case where light is incident on substantially half the surface of the lens inner side 44a on the vehicle outer side (on the optical axis center Z side of the lens 40).

  Accordingly, FIG. 8 shows that the position of the left-side light distribution surface 43b on which the light from the right light source 70b is incident is divided into approximately ¼ surfaces, and FIGS. 8A to 8D are viewed in order. The light incident / exit state of the lens 40 at each position on the light incident surface from the vehicle inner side to the vehicle outer side (left diagram) and the light distribution state on the screen at that time (right diagram) can be seen. It has become what.

Further, in FIG. 8, the screens of FIGS. 8A to 8D are displayed on the upper left side of the screen (right diagram), indicating the direction of the outside, the front, and the inside as “outside → front”.
The contents shown by the above display will be described in detail with reference to FIG. 8A. In the present embodiment, the portion of the lens outer side 44b that is closest to the vehicle inner side is the portion that is located closest to the vehicle inner side. A light distribution outside the light distribution pattern of the screen (on the left side of the screen) is formed, and the front of the light distribution pattern on the screen ("VU-VD" of the screen) as it approaches the center side (vehicle outer side) of the lens outer side 44b. Line side) light distribution is formed.

  Therefore, when the incident surface is viewed from the inside of the vehicle to the outside of the vehicle, the light distribution on the screen is such that the relationship between the light incident position and the position in the light distribution pattern on the screen is understood. In the case of FIG. 8 (a), the relationship between the position of the incident surface and the light distribution position on the screen is as described above. Since there is, the display is “outside → front”.

The way of viewing and notation of FIG. 8 is as described above.
Hereinafter, a detailed description of the light distribution control of the left-side light distribution entrance surface 43b will be made with reference to FIG.
As can be seen from FIG. 8A, the light emitted from the right light source 70b to the innermost side of the vehicle reaches the innermost position of the outer side of the lens 44b, but this light does not go to the inner side of the vehicle. As described above, the light distribution control is performed so that the portion of the lens outer side 44b located on the innermost side of the vehicle forms a light distribution on the outer side of the vehicle.

Then, sequentially, as the direction of light from the right light source 70b is changed from the vehicle inner side to the vehicle outer side, the lens outer side 44b also forms a light distribution from the vehicle outer side to the vehicle inner side as it goes from the vehicle inner side to the vehicle outer side. So that the light distribution is controlled.
Specifically, as indicated by “outside to front” at the upper left of the screen, the substantially half surface inside the vehicle outside the lens 44b forms a light distribution from the outside of the vehicle toward the outside of the vehicle as it goes from the inside of the vehicle to the outside of the vehicle. The light distribution control is performed.

Next, as shown in FIG. 8B, the light distribution control is performed so that the substantially half surface of the lens outer side 44b located on the vehicle outer side also forms a light distribution from the vehicle outer side toward the vehicle inner side as it goes from the vehicle inner side to the vehicle outer side. doing.
Specifically, a portion of the surface of the lens outer side 44b irradiated with light in FIG. 8B on the vehicle inner side is a surface continuous from the surface of the lens outer side 44b described in FIG. 8A. Therefore, light is irradiated near the “front” on the screen.
The substantially half surface of the lens outer side 44b irradiated with light in FIG. 8B starts from the inner side of the vehicle irradiating light in the vicinity of the “front” on the screen. Light distribution control is performed so as to form a light distribution inside the vehicle from the front of the vehicle as it goes outward, as indicated by “front → inside” at the upper left of the screen.

However, “inside” described here means the inside of the vehicle that is about 5 ° to 10 ° inside the vehicle beyond the “VU-VD” line on the screen.
Since the left-side light distribution entrance surface 43b is located on the inner side of the vehicle, an inner panel or the like on the inner side of the vehicle is located nearby, so that if the light is irradiated too much on the inner side of the vehicle, the inner panel or the like may be irradiated with light.
For this reason, it is preferable to limit the irradiation of light on the vehicle inner side to a range on the vehicle inner side of about 5 ° to 10 ° on the vehicle inner side exceeding the “VU-VD” line.

  In this way, the portion of the lens outer side 44b close to the vehicle inner side is located on the vehicle outer side so that the innermost panel on the vehicle inner side of the light from the right light source 70b is not irradiated to the inner panel or the like on the vehicle inner side. A light distribution outside the vehicle (on the left side of the screen) is formed so as to emit light.

  Then, starting from the fact that the portion of the lens outer side 44b close to the vehicle inner side forms the light distribution on the vehicle outer side, the lens outer side 44b forms the light distribution on the vehicle inner side toward the vehicle outer side, and the entire lens outer side 44b. From the “VU-VD” line formed by combining the light distribution patterns on the screen in FIGS. 8A and 8B to the outside of the vehicle from the range of 5 ° to 10 ° inside the vehicle. Light distribution pattern, that is, a left-side light distribution pattern (vehicle-outside light distribution pattern) is formed (see FIG. 7B).

  On the other hand, the portion connected to the lens outer side 44b of the lens inner side 44a on the optical axis center Z side of the lens 40 shown in FIG. 8C is light in the vicinity of the light distribution portion inside the vehicle formed by the adjacent lens outer side 44b. Will be irradiated.

Then, the light distribution formed by the lens outer side 44b on the outer side of the vehicle adjacent to the lens inner side 44a is kept within the range of about 5 ° to 10 ° on the inner side of the vehicle beyond the “VU-VD” line. This is because there is a possibility that light may be irradiated to an inner panel or the like inside the vehicle.
For this reason, when the lens inner side 44a is formed on a surface that irradiates light on the vehicle inner side from the portion connected to the lens outer side 44b of the lens inner side 44a toward the vehicle outer side (optical axis center Z side of the lens 40), There is a risk of irradiating light on the inner panel.

  For this reason, the lens inner side 44a is directed from the inner side of the vehicle (right side of the screen) to the outer side of the vehicle (left side of the screen) from the inner side portion of the vehicle toward the outer side portion of the vehicle so as not to irradiate light further in the vehicle inner direction. The light distribution pattern formed is the same as the light distribution pattern formed by the lens outer side 44b so that the light distribution different from the light distribution pattern formed by the lens outer side 44b is not formed. A left-side light distribution pattern (vehicle-side light distribution pattern) having substantially the same shape that is substantially included in the light distribution pattern formed by the lens outer side 44b is formed.

  More specifically, as shown in FIG. 8 (c), approximately half of the lens inner side 44a has a light distribution “inside → front” of the screen from the vehicle inner side toward the vehicle outer side. The light distribution pattern is controlled so as to be formed, and the light distribution pattern on the screen formed by the light distribution control is a light distribution pattern substantially included in the light distribution pattern on the screen in FIG. It is like that.

  In addition, as shown in FIG. 8D, a substantially half surface of the lens inner side 44a on the vehicle outer side forms a light distribution “front → outside” of the screen from the vehicle inner side toward the vehicle outer side. In addition to controlling the light distribution, the light distribution pattern on the screen formed by the light distribution control becomes a light distribution pattern substantially included in the light distribution pattern on the screen of FIG. Yes.

As described above, the lens inner side 44a is arranged from the vehicle inner side to the vehicle outer side so that the light is not irradiated on the inner panel or the like on the inner side of the vehicle and the left side light distribution pattern formed by the lens outer side 44b is maintained. A left side light distribution pattern formed by the lens outer side 44b is formed by forming a light distribution pattern in which the lens outer side 44b is folded back so as to reversely follow the light distribution state formed from the vehicle inner side toward the vehicle outer side. A left-side light distribution pattern (substantially the same or included left-side light distribution pattern) having substantially the same shape is formed.
When the left side light distribution patterns formed by the lens inner side 44a and the lens outer side 44b described above are combined, the light distribution pattern on the screen shown in FIG. 7B is obtained.

(Light distribution control on the entrance surface for rightward light distribution)
Next, what kind of light distribution control is performed on the light from the left light source 70a (light-emitting chip 74a) by the right-side light incident surface 43a will be described.
9 (a) and 9 (b) are shown on the left side of a substantially half surface of the lens outer side 45b (vehicle outer side) away from the optical axis center Z of the lens 40 with the approximate center of the right-side light distribution entrance surface 43a as a reference. The case where the light from the light source 70a injects is shown.

  FIG. 9A shows a case where light is incident on a substantially half surface outside the vehicle among the lens outside 45b, and FIG. 9B shows the inside of the lens outside 45b (the lens). 40 shows a case where light is incident on substantially half the surface of the 40 optical axis center Z side).

On the other hand, FIG. 9C and FIG. 9D show a portion located inside the vehicle with reference to the approximate center of the right-side light distribution entrance surface 43a, that is, the lens inner side 45a which is the optical axis center Z side of the lens 40. The case where the light from the left light source 70a enters is shown.
FIG. 9C shows a case where light is incident on substantially half of the lens inner side 45a on the vehicle outer side (side away from the optical axis center Z of the lens 40). d) shows a case where light is incident on a substantially half surface of the lens inner side 45a on the vehicle inner side (optical axis center Z side of the lens 40).

  As described above, FIG. 9, as in FIG. 8, divides the position of the right-side light distribution entrance surface 43 a on which the light from the left light source 70 a is incident into approximately ¼ surfaces, and FIG. 9A sequentially. → Looking at FIG. 9 (d), the state of light entering and exiting the lens 40 at each position inside the vehicle from the outside of the surface on which the light enters (left figure), and the arrangement on the screen at that time The light state (right figure) can be understood.

  9 is slightly different from FIG. 8 in the way of viewing the upper left display (for example, “inner front” in FIG. 9A) of the screens of FIG. 9A to 9D (right figure). Please note that.

FIG. 8 shows that the position of the light distribution on the screen changes from “inside to front” when the position of the left-side light distribution incident surface 43b is viewed from the inside of the vehicle toward the outside of the vehicle. In FIG. 9, the position of the light distribution on the screen is not when the position of the right-side light distribution entrance surface 43 a is viewed from the inside of the vehicle toward the outside of the vehicle, but when viewed from the outside of the vehicle toward the inside of the vehicle. It is different in that it shows a change such as “inside → front”.
That is, FIG. 9 is different from FIG. 8 in that the trace direction when viewing the incident surface is reversed.

  9A to 9D, the right-side light distribution entrance surface 43a is symmetric with respect to the left-side light distribution entrance surface 43b shown in FIG. 8 with respect to the optical axis center Z of the lens 40. Since it is formed in a shape, the state of the left-side light distribution surface 43b that has already been described is simply viewed symmetrically with respect to the optical axis center Z, and a detailed description thereof is omitted.

Thus, the right-side light distribution entrance surface 43a shown in FIG. 9 has a shape obtained by symmetrically folding the left-side light distribution entrance surface 43b shown in FIG. 8 with respect to the optical axis center Z of the lens 40. The state and the like are also folded back symmetrically with respect to the optical axis center Z of the lens 40.
Therefore, the light distribution pattern formed by the right-side light distribution incident surface 43a is a light distribution pattern from the vehicle outer side range of about 5 ° to 10 ° beyond the “VU-VD” line to the vehicle inner side. The light distribution pattern on the right side (light distribution pattern on the vehicle inner side) is shown (see FIG. 7A).

Here, since the right-side light distribution entrance surface 43a is located on the vehicle outer side from the left-side light distribution entrance surface 43b, the light is incident on the vehicle inner side because the distance is away from the inner panel on the vehicle inner side. The risk of light irradiating the inner panel or the like is lower than when irradiating the vehicle inner side with the left-side light incident surface 43b on the vehicle inner side.
For this reason, the right side light distribution pattern (the vehicle inner side light distribution pattern) on the vehicle inner side is used so that the inner panel or the like is not irradiated with light by using the right side light distribution incident surface 43a located on the vehicle outer side. ) Is formed.

(Description of light distribution pattern)
Hereinafter, the left side light distribution pattern (vehicle outer side light distribution pattern), the right side light distribution pattern (vehicle inner side light distribution pattern), and the left side light distribution pattern and right side light distribution pattern formed as described above are superposed. The distant light distribution pattern (for example, a high beam light distribution pattern) that is generated will be described in more detail with reference to FIG.
10 (a) to 10 (c) are diagrams showing the luminous intensity distribution of the light distribution pattern on the screen. Therefore, the inner side has higher luminous intensity, that is, brighter. .

FIG. 10A shows in what range the left-side light distribution pattern (vehicle-outside light distribution pattern) is located on the screen and what light intensity distribution the left-side light distribution pattern has. Is shown.
As described above, the leftward light distribution pattern is formed by controlling the light distribution of the light from the right light source 70b at the leftward light incident surface 43b.

Further, FIG. 10B shows what range the right side light distribution pattern (vehicle inner side light distribution pattern) is located on the screen and what light intensity distribution the right side light distribution pattern has. It is shown whether there is.
This rightward light distribution pattern is formed by controlling the light distribution of the light from the left light source 70a at the rightward light distribution incident surface 43a.

  FIG. 10C shows a left side light distribution pattern (vehicle outer side light distribution pattern) shown in FIG. 10A and a right side light distribution pattern shown in FIG. 10B (vehicle inner side light distribution pattern). The range of the light distribution pattern (far light distribution pattern) on the screen as a vehicular lamp in which the above and the like are superposed and the light intensity distribution of the remote light distribution pattern are shown.

First, the left side light distribution pattern (vehicle outer side light distribution pattern) shown in FIG.
As shown in FIG. 10A, the left-side light distribution pattern forms a left-side light distribution pattern that is closer to the outside of the vehicle in the far-field light distribution pattern of FIG. 10C. It does not form only the area outside the vehicle from the line.

As shown in FIG. 10 (a), the light distribution in a part of the range on the vehicle inner side than the “VU-VD” line of the screen is also formed.
More specifically, it forms from the “VU-VD” line to a partial light distribution range that is at least 5 ° or more inside the vehicle.

  In the present embodiment, considering that the left-side light distribution incident surface 43b forming the left-side light distribution pattern is an incident surface located on the inner side of the vehicle, no light is irradiated on the inner panel or the like on the inner side of the vehicle. As described above, the light distribution range inside the vehicle formed by the leftward light distribution pattern is kept within a range of 10 ° or less.

Next, the right side light distribution pattern (vehicle inner side light distribution pattern) shown in FIG.
As shown in FIG. 10B, the right-side light distribution pattern also forms a right-side light distribution pattern that is closer to the inside of the vehicle than the far-side light distribution pattern of FIG. 10C. It does not form only the area inside the vehicle from the line.

As shown in FIG. 10B, a light distribution in a part of the range outside the vehicle from the “VU-VD” line of the screen is also formed.
Specifically, a range from the “VU-VD” line to a partial light distribution range that is at least 5 ° or more outside the vehicle is formed.

  In the present embodiment, the right-side light distribution pattern is a symmetrical light distribution pattern in which the left-side light distribution pattern is folded back with respect to the “VU-VD” line of the screen. The light distribution range outside the vehicle from the “VU-VD” line is a range of 10 ° or less.

  Accordingly, the light distribution pattern on the left side (light distribution pattern on the vehicle outer side) includes light distribution of at least 5 ° or more on the vehicle inner side than the “VU-VD” line of the screen, and the light distribution pattern on the right side (light distribution pattern on the vehicle inner side). ) Includes a light distribution of at least 5 ° or more outside the vehicle with respect to the “VU-VD” line of the screen.

  Then, the left light distribution pattern and the right light distribution pattern as described above are superposed to form the far light distribution pattern shown in FIG. 10C. Therefore, the far light distribution pattern is the “VU” of the screen. With reference to the “−VD” line, a light distribution of at least 5 ° inside the vehicle and at least 5 ° outside the vehicle is formed by overlapping the left-side light distribution pattern and the right-side light distribution pattern. ing.

  For this reason, even if any one of the right light source 70b and the left light source 70a is cut off and no longer illuminates, it is at least 5 ° or more inside the vehicle with reference to the “VU-VD” line on the screen. It becomes possible to continue irradiating light to the range and at least a range of 5 ° or more outside the vehicle.

  Next, paying attention to the point of the luminous intensity distribution, as shown in FIG. 10A, the left-side light distribution pattern has a relatively wide bright portion with a high luminous intensity at the approximate center of the screen.

As described with reference to FIG. 6, the light irradiation axis of the right light source 70 b is positioned in the vicinity of the portion of the convex curved surface of the left-side light distribution entrance surface 43 b that protrudes to the rightmost light source 70 b side. As shown in FIGS. 8B and 8C, the screen is positioned near the boundary between the lens outer side 44b and the lens inner side 44a of the left-side light distribution entrance surface 43b where the protruding portion is located. This is because the light distribution near the center is formed.
That is, the light irradiation axis of the right light source 70b having high luminous intensity is aligned with the position of the left-side light distribution entrance surface 43b closest to the light source 70b, and the light distribution near the center of the screen at the left-side light distribution entrance surface 43b. It is because it is trying to form.

On the other hand, in the right side light distribution pattern shown in FIG. 10B, a bright portion having a high luminous intensity is formed relatively wide in the approximate center of the screen, similarly to the left side light distribution pattern.
Accordingly, the bright portion (hot zone HZ) having a high luminous intensity at the approximate center of the screen of the distant light distribution pattern shown in FIG. 10C is bright and having a high luminous intensity at the approximate center of the right-side distribution pattern. The portion and the bright portion with a high luminous intensity at the approximate center of the screen, which is formed relatively wide in the left-side light distribution pattern, are formed by overlapping.

Here, when the vehicle lamp is assembled, the right light source 70b and the left light source 70a may be attached in a state offset from the design center within a design allowable range.
Then, the light from the right light source 70b and the left light source 70a enters the lens 40 at a position offset from the design center.
Even in such a case, according to the present embodiment, it is possible to maintain the hot zone HZ at the approximate center of the screen of the distant light distribution pattern.
Hereinafter, this reason will be specifically described with reference to FIG.

  FIG. 11A shows the state of the far-field light distribution pattern on the screen when both the right light source 70b and the left light source 70a are attached at the design center position.

  On the other hand, in FIG. 11B, the right light source 70b is mounted so that the leftward light distribution pattern is offset to the maximum within the allowable range, and the left light source 70a has the maximum rightward light distribution pattern within the allowable range. This is a case where it is mounted so as to be offset downward.

The allowable range mentioned here means a range associated with clearances allowed between parts for workability at the time of assembly, etc. Therefore, the maximum within the allowable range is the range of clearances. It means that it is offset to the maximum.
For this reason, FIG. 11B simulates the case where the maximum offset that can occur in normal assembly work occurs.

  Even if the above-described offset occurs, a bright portion having a high luminous intensity at the approximate center of the right-side light distribution pattern and the left-side light distribution pattern is widely formed, so that an overlapping portion remains, and FIG. As shown in FIG. 3, a hot zone HZ is maintained at a substantially central portion of the screen of the remote light distribution pattern.

  In FIG. 11C, the right light source 70b is mounted so that the leftward light distribution pattern is offset to the maximum outside the allowable range, and the left light source 70a is maximum rightward light distribution pattern within the allowable range. Is attached to be offset inside the vehicle.

  Even in this case, as described above, the left light distribution pattern overlaps with the right light distribution pattern side by at least 5 ° or more, and the right light distribution pattern also overlaps with the left light distribution pattern by at least 5 ° or more. As shown in FIG. 11C, the remote light distribution pattern is not separated into two light distribution patterns at the “VU-VD” line of the screen.

  In addition, as described above, since the bright portion having a high luminous intensity at the approximate center of the right-side light distribution pattern and the left-side light distribution pattern is widely formed, the overlapping portion remains, and the screen of the far-field light distribution pattern A hot zone HZ is maintained at a substantially central portion.

Hereinafter, the effects of the configuration of the present embodiment will be summarized.
In this embodiment, it is only necessary to have at least two light sources, the left light source 70a and the right light source 70b. Therefore, it is not necessary to use a large number of light sources as in the prior art, and the number of parts can be greatly reduced. It is.
In addition, since the number of light sources is small, the size of the lens 40 corresponding to the light source can be greatly reduced, so that the vehicle lamp can be downsized in combination with the reduction in the number of parts.

  Further, the light distribution pattern on the left side (light distribution pattern on the outside of the vehicle) forms a partial light distribution range that is at least 5 ° or more on the vehicle inner side than the “VU-VD” line of the screen. A part of the light distribution range (light distribution pattern closer to the vehicle inner side) is at least 5 ° or more on the vehicle outer side than the “VU-VD” line of the screen.

  Therefore, even if any one of the right light source 70b and the left light source 70a is cut off and does not turn on, a range of at least 5 ° inside the vehicle with reference to the “VU-VD” line of the screen. It is possible to continue irradiating light at least in the range of 5 ° or more outside the vehicle.

  Further, the left side light distribution incident surface 43b located on the inner side of the vehicle forms a left side light distribution pattern in which light distribution on the outer side of the vehicle is formed, and the right side light distribution incident surface 43a located on the outer side of the vehicle is on the right side of the vehicle. Since the light distribution pattern is formed, irradiation of light to the inner panel or the like inside the vehicle is suppressed, and generation of glare light can be suppressed.

  Furthermore, since the portion of high luminous intensity at the approximate center of the screen of the left-side light distribution pattern and the right-side light distribution pattern is widely formed, even if the attachment position offset occurs when the right light source 70b or the left light source 70a is attached, The distant light distribution pattern, which is the light distribution as the vehicular lamp, can maintain the hot zone HZ satisfactorily.

  In addition, since the connection portion between the left-side light distribution entrance surface 43b and the right-side light distribution entrance surface 43a is connected without a step, the light is not scattered or reflected at the step, and no glare light is generated.

In the above description, the left vehicle lamp has been described as a specific embodiment. However, the same is basically applied to the right vehicle lamp, and the lamp unit described above is provided on the right vehicle lamp side. And is arranged in a lamp chamber formed by a right outer lens and a housing.
As described above, the present invention has been described based on the specific embodiments. However, the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention. It is intended to be included in the present invention, which will be apparent to those skilled in the art from the appended claims.

DESCRIPTION OF SYMBOLS 10 Lamp unit 20 Cover 30 Heat sink 40 Lens 41a, 41b Flange 42 Outgoing surface 43 Incident surface 43a Right side light distribution entrance surface 43b Left side light distribution entrance surface 44a Lens inside 44b Lens outside 45a Lens inside 45b Lens outside 50 Lens holder 51a, 51b Screw fixing portions 61a, 61b Screws 62a, 62b Screws 63a, 63b A pair of screws 70a Right light source 70b Left light source 71a, 71b Electric connectors 72a, 72b Body 73a, 73b Light emitting chips 101L, 101R Vehicle lamp 102 Vehicle O Lens origin Z Lens optical axis center

Claims (5)

A lens,
A right light source and a left light source provided across the optical axis center of the lens,
The incident surface of the lens corresponding to the right light source is a left-side light distribution incident surface that forms a left-side light distribution pattern of a far-field light distribution pattern,
The incident surface of the lens corresponding to the left light source is a right-side light distribution incident surface that forms a right-side light distribution pattern of the far-field light distribution pattern,
The left-side light distribution entrance surface forms the entirety of the left-side light distribution pattern with the lens inner side on the optical axis center side as a reference, and the lens outer side also has the left-side light distribution pattern substantially the same as the lens inner side. Formed,
The right-side light distribution entrance surface forms the entire right-side light distribution pattern with the lens inner side on the optical axis center side forming the entire right-side light distribution pattern with reference to the substantially center, and the right side light distribution pattern is substantially the same as the lens inner side. Formed,
The vehicular lamp, wherein the left light distribution pattern and the right light distribution pattern are overlapped and overlapped in the vicinity of the center of the optical axis to form the far light distribution pattern. The left-side light distribution pattern formed by the lens inner side of the left-side light distribution incident surface and the left-side light distribution pattern formed by the lens outer side of the left-side light distribution incident surface are either the left-side light distribution pattern. Includes the other left-hand light distribution pattern,
The right-side light distribution pattern formed by the lens inner side of the right-side light distribution incident surface and the right-side light distribution pattern formed by the lens outer side of the right-side light distribution incident surface are either the right-side light distribution pattern. The vehicle lamp according to claim 1, further comprising the other right-hand side light distribution pattern.   The light distribution pattern formed by the lens outside of the left-side light distribution entrance surface and the right-side light distribution entrance surface includes the light distribution pattern formed by the lens inside. The vehicle lamp as described.   The vehicular lamp according to any one of claims 1 to 3, wherein a connecting portion between the left-side light distribution entrance surface and the right-side light distribution entrance surface is connected without a step. The left-side light distribution entrance surface is formed as a convex curved surface having a portion that protrudes most toward the right light source side in the vicinity of the boundary between the lens inner side and the lens outside of the left-side light distribution entrance surface. ,
The right light source is arranged so that the light irradiation axis of the right light source is located in the vicinity of the most protruding portion of the left-side light distribution entrance surface,
The right-side light distribution entrance surface is formed as a convex curved surface having a portion that protrudes most toward the left light source side in the vicinity of the boundary between the lens inner side and the lens outer side of the right-side light distribution entrance surface. ,
The left-side light source is arranged so that a light irradiation axis of the left-side light source is positioned in the vicinity of the most protruding portion of the right-side light distribution entrance surface. The vehicular lamp according to claim 1.