JP2024004153A - Lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an OHS-irradiation light distribution pattern without increasing a number of part items of a lamp for a vehicle, in the lamp for the vehicle having first and second lamp units for forming a low-beam light distribution pattern.

SOLUTION: A second lamp unit 30B for forming a low-beam light distribution pattern diffusion region is made to possess a function for forming an OHS-irradiation light distribution pattern. That is, by sequentially reflecting emission light from a light source 34B toward a projection lens 32B by using a first additional reflection face 36Bb formed at a front end part of a reflector 36B, and a second additional reflection face 38Bb formed in a position at a lamp front side and a lower side rather than the upward reflection face 38Ba of a shade 38B, the OHS-irradiation light distribution pattern can be formed. At this time, since a light distribution function as the second lamp unit 30B can be obtained even if a fore-and-aft width of the upward reflection face 38Bb is narrowed, the reflector 36B and the shade 38B can be integrally formed.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a vehicle lamp including first and second lamp units for forming a low beam light distribution pattern.

Conventionally, as a vehicle lamp for forming a low beam light distribution pattern, the light emitted from a light source placed on the rear side of the lamp rather than the rear focal point of the projection lens is arranged so as to cover this light source from above. After that, a shade placed between the reflector and the projection lens blocks a part of the reflected light from the reflector, and the cutoff line of the low beam light distribution pattern is set. It is known that the structure is configured to form a .

``Patent Document 1'' describes such a vehicle lamp as a first lamp unit configured to form a main area of a low beam light distribution pattern, and a first lamp unit configured to form a diffusion area of a low beam light distribution pattern. A device including a second lamp unit configured as shown in FIG.

In the vehicle lamp described in Patent Document 1, the structure of the shade in each of the first and second lamp units includes an upward reflecting surface that reflects the reflected light from the reflector upward toward the projection lens. This configuration increases the luminous flux utilization rate for the light emitted from the light source.

International Publication No. 2013/183240

When a low beam light distribution pattern is formed by the light emitted from such a vehicle lamp, the OHS light distribution pattern (i.e., an overhead sign installed above the road surface in front of the vehicle) is illuminated in the space above the cutoff line. It is desirable to form a light distribution pattern for

In this case, it is desirable to realize this without increasing the number of parts of the vehicle lamp as much as possible.

The present invention has been made in view of the above circumstances, and is a vehicle lamp equipped with first and second lamp units for forming a low beam light distribution pattern, which reduces the number of parts of the vehicle lamp. It is an object of the present invention to provide a vehicle lamp that can form a light distribution pattern for OHS irradiation without increasing the number of lights.

The present invention aims to achieve the above object by devising the configuration of one of the first and second lamp units.

That is, the vehicle lamp according to the present invention is
In a vehicle lamp including first and second lamp units for forming a low beam light distribution pattern,
Each of the first and second lamp units includes a projection lens, a light source arranged on the rear side of the lamp with respect to a rear focal point of the projection lens, and a light source arranged so as to cover the light source from above. a reflector that reflects the emitted light from the light source toward the projection lens; and a reflector that is disposed between the reflector and the projection lens to form a cutoff line of the low beam light distribution pattern. a shade that blocks part of the reflected light, and the shade is provided with an upward reflecting surface that reflects the reflected light from the reflector upward toward the projection lens,
The first lamp unit is configured to form a main area of the low beam light distribution pattern, and the second lamp unit is configured to form a diffusion area of the low beam light distribution pattern,
In the second lighting unit, a first additional reflective surface is formed at the front end of the reflector to reflect the light emitted from the light source toward the front end of the upward reflective surface of the shade. A second additional reflective surface is formed at a position on the front side and lower side of the lamp than the reflective surface to reflect the emitted light from the light source reflected by the first additional reflective surface toward the projection lens. The reflector and the shade are integrally formed.

The light distribution pattern formed by the irradiation light from the "first lamp unit" is not particularly limited in its specific shape as long as it forms the main area of the low beam light distribution pattern, Furthermore, the specific shape of the light distribution pattern formed by the irradiated light from the "second lamp unit" is not particularly limited as long as it forms the diffusion area of the low beam light distribution pattern. do not have.

If the above-mentioned "first additional reflective surface" is configured to reflect the emitted light from the light source at the front end of the reflector toward the front end of the upward reflective surface of the shade, the specific shape of the reflective surface is It is not particularly limited.

The above-mentioned "second additional reflective surface" is located at a position in front of the lamp and lower than the upward reflecting surface of the shade, so as to reflect the emitted light from the light source reflected by the first additional reflective surface toward the projection lens. The specific shape of the reflecting surface is not particularly limited as long as it is configured as follows.

A vehicle lamp according to the present invention includes a first lamp unit configured to form a main area of a low beam light distribution pattern, and a second lamp unit configured to form a diffusion area of a low beam light distribution pattern. unit, it becomes possible to easily form a low beam light distribution pattern with a light distribution suitable for vehicle running.

At that time, the first and second lighting units block a portion of the emitted light from the light source that is reflected by the reflector with a shade placed between the reflector and the projection lens, thereby adjusting the cutoff line of the low beam light distribution pattern. However, since the shade is formed with an upward reflecting surface that reflects the reflected light from the reflector upward toward the projection lens, it is possible to increase the luminous flux utilization rate for the light emitted from the light source. can.

Moreover, in the second lighting unit, a first additional reflective surface is formed at the front end of the reflector to reflect the emitted light from the light source toward the front end of the upward reflective surface of the shade, and the upward reflective surface of the shade A second additional reflective surface is formed at a position on the front side and lower side of the lamp than the second additional reflective surface that reflects the emitted light from the light source reflected by the first additional reflective surface toward the projection lens, and Since the reflector and the shade are integrally formed, the following effects can be obtained.

That is, in the second lamp unit, the light reflected from the first additional reflective surface of the reflector is reflected toward the projection lens by the second additional reflective surface of the shade, thereby reducing the cut when forming the low beam light distribution pattern. A light distribution pattern for OHS irradiation can be formed in the space above offline. In this case, since the second lamp unit is configured to form a diffusion area for the low beam light distribution pattern, the desired light distribution pattern can be achieved even if the width of the lamp in the front and back direction is narrowed as the upward reflecting surface of the shade. It becomes possible to form. Therefore, it is possible to easily mold the second lamp unit even if the reflector and the shade are integrally formed, and thereby the number of parts of the vehicle lamp can be reduced.

As described above, according to the present invention, in a vehicle lamp equipped with first and second lamp units for forming a low beam light distribution pattern, the light distribution pattern for OHS irradiation can be created without increasing the number of parts of the vehicle lamp. can be formed.

In the above structure, if the reflector and shade of the first lamp unit and the reflector and shade of the second lamp unit are integrally formed, the following effects can be obtained.

That is, since the function for forming the light distribution pattern for OHS irradiation is provided to the second lamp unit, such a function is not required for the first lamp unit that forms the main area of the light distribution pattern for low beam. , the reflector and the shade can easily be formed integrally. Therefore, even if these are integrally formed with the reflector and shade of the second lamp unit, it is easily possible to mold them, thereby further reducing the number of parts of the vehicle lamp.

In this case, the light source of the second lamp unit is placed closer to the front of the lamp than the light source of the first lamp unit, and the reflector of the second lamp unit partially overlaps with the reflector of the first lamp unit when viewed from the front of the lamp. By positionally arranging the lamp to the front side of the reflector of the first lamp unit, the lateral width of the vehicular lamp can be narrowed, thereby making it possible to downsize the vehicular lamp.

Furthermore, if the reflector of the second lighting unit is configured to have a smaller reflective surface shape than the reflector of the first lighting unit, the light distribution function required for each of the first and second lighting units can be maintained. It is possible to downsize the vehicle lamp.

In the above structure, if the projection lens of the first lamp unit and the projection lens of the second lamp unit are integrally formed, it is possible to further reduce the number of parts of the vehicle lamp.

A front view showing a vehicle lamp according to an embodiment of the present invention A plan view showing the light unit assembly of the vehicle light above. Cross-sectional view taken along line III-III in Figure 2 Cross-sectional view taken along the line IV-IV in Figure 2 A perspective view showing the above lighting unit assembly A perspective view showing the low beam light distribution pattern formed by the light emitted from the vehicle lamp. A diagram similar to FIG. 2 showing a modification of the above embodiment. A diagram similar to FIG. 6 showing the effect of the above modification.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a vehicle lamp 10 according to an embodiment of the present invention. Further, FIG. 2 is a plan view showing the lamp unit assembly 20 of the vehicle lamp 10.

In Figures 1 and 2, the direction indicated by The direction is "upward". The same applies to figures other than FIGS. 1 and 2.

As shown in FIGS. 1 and 2, the vehicular lamp 10 according to the present embodiment is a headlamp disposed at the left front end of a vehicle, and includes a lamp body 12 and a transparent lamp body 12 attached to the front end opening of the lamp body 12. A lamp unit assembly 20 is housed in a lamp chamber formed with a transparent cover 14.

The lamp unit assembly 20 has a structure in which first and second lamp units 30A and 30B for forming a low beam light distribution pattern are integrally formed.

The first and second lighting units 30A and 30B are both configured as projector-type lighting units, and are arranged side by side in the left-right direction (that is, in the vehicle width direction). Specifically, the first lighting unit 30A is located on the right side, and the second lighting unit 30B is located on the left side.

In the vehicle lamp 10, the main area of the low beam light distribution pattern is formed by the irradiation light from the first lamp unit 30A, and the diffusion area of the low beam light distribution pattern is formed by the irradiation light from the second lamp unit 30B. is configured to do so. Note that this will be described later.

Next, the specific configuration of each of the first and second lamp units 30A and 30B will be described.

3 is a sectional view taken along the line III--III in FIG. 2, and FIG. 4 is a sectional view taken along the line IV--IV in FIG. Further, FIG. 5 is a perspective view showing the lamp unit assembly 20.

First, the specific configuration of the first lamp unit 30A will be described.

As shown in FIGS. 3 and 5, the first lamp unit 30A includes a projection lens 32A having an optical axis Ax1 extending in the longitudinal direction of the lamp, and a rear focal point (more precisely, a rear focal point in a vertical section) of the projection lens 32A. (focal point) A light source 34A arranged on the rear side of the lamp than F1; and a reflector 36A arranged to cover this light source 34A from above and reflect the emitted light from the light source 34A toward the projection lens 32A. , a shade 38A is provided between the reflector 36A and the projection lens 32A to block part of the reflected light from the reflector 36A.

The projection lens 32A is a plano-convex aspherical lens whose front surface 32Aa is a convex curved surface and whose rear surface 32Ab is a plane. The image is projected onto a virtual vertical screen in front of the lamp. The projection lens 32A has a horizontally long rectangular outer shape when viewed from the front of the lamp.

The light source 34A is a light emitting element (specifically, a white light emitting diode) and has a light emitting surface 34Aa in the shape of a horizontally long rectangle. The light source 34A is supported by the substrate 40A with its light emitting surface 34Aa facing upward on the optical axis Ax1.

The reflector 36A is configured to make the light emitted from the light source 34A enter the projection lens 32A as light that converges in the left-right direction.

Specifically, the reflective surface 36Aa of the reflector 36A is composed of a substantially ellipsoidal curved surface whose first focal point is the emission center of the light source 34A, and its eccentricity gradually increases from the vertical cross section to the horizontal cross section. It is set to be large. Thereby, the reflector 36A substantially converges the emitted light from the light source 34A to a point located in front of the lamp at the rear focal point F1 in the vertical cross section, and further moves the convergence position toward the front of the lamp in the horizontal cross section. It is designed to be displaced to.

The shade 38A is formed with an upward reflecting surface 38Aa that reflects a portion of the reflected light from the reflector 36A upward toward the projection lens 32A. In this upward reflecting surface 38Aa, the left side area located on the left side of the optical axis Ax1 (right side when viewed from the front of the lamp) is composed of a horizontal plane including the optical axis Ax1, and the right side area located on the right side of the optical axis Ax1 is composed of a horizontal plane. , consists of a horizontal plane that is one step lower than the left area through a short slope.

The upward reflecting surface 38Aa of the shade 38A is formed such that its front edge 38Aa1 curves and extends toward the front of the lamp from the rear focal point F1 of the projection lens 32A toward both left and right sides, and its rear edge 38Aa2 also extends from the rear focal point F1 of the projection lens 32A toward the front side of the lamp. It is formed to curve and extend toward the front side of the lamp. This upward reflecting surface 38Aa is formed such that its rear edge 38Aa2 is located on the front side of the lamp rather than the front edge 36Aa1 of the reflecting surface 36Aa in the reflector 36A, so that the shade 38A and the reflector 36A overlap in plan view. It is configured not to.

Next, a specific configuration of the second lamp unit 30B will be described.

As shown in FIGS. 4 and 5, the second lighting unit 30B, like the first lighting unit 30A, has a configuration including a projection lens 32B, a light source 34B, a reflector 36B, and a shade 38B. 32B, reflector 36B, and shade 38B are different from those of the first lamp unit 30A.

That is, the projection lens 32B is configured as a cylindrical lens extending in the left-right direction, and has the same vertical width as the projection lens 32A of the first lamp unit 30A. The rear surface 32Bb of the projection lens 32B is flush with the rear surface 32Ab of the projection lens 32A, but its front surface 32Ba is located on the rear side of the lamp than the front surface 32Aa of the projection lens 32A. Specifically, in this projection lens 32B, the rear focal point F2 in a vertical cross section including the optical axis Ax2 as an axis extending in the front and rear direction of the lamp so as to pass through the light emission center of the light source 34B is located at the projection lens 32A with respect to the front and rear direction of the lamp. The curvature of the front surface 32Ba is set to be at approximately the same position as the rear focal point F1.

The light source 34B is composed of the same light emitting element as the light source 34A of the first lamp unit 30A, and is arranged on the rear side of the lamp rather than the rear focal point F2 of the projection lens 32B. At this time, the light source 34B is supported by the substrate 40B on the front side of the lamp relative to the light source 34A, with its light emitting surface 34Ba facing upward on the optical axis Ax2 of the projection lens 32B.

Similar to the reflector 36A of the first lighting unit 30A, the reflector 36B is arranged to cover the light source 34B from above, and allows the light emitted from the light source 34B to enter the projection lens 32B as light that converges in the horizontal direction. It is configured as follows. The reflective surface 36Ba of the reflector 36B is also formed of a substantially ellipsoidal curved surface whose first focal point is the emission center of the light source 34B, but its size is smaller than the reflective surface 36Aa of the reflector 36A.

Similar to the shade 38A of the first lighting unit 30A, the shade 38B has an upward reflecting surface 38Ba that blocks a portion of the reflected light from the reflector 36B and reflects a portion of the reflected light upward toward the projection lens 32B. However, the configuration of the upward reflecting surface 38Ba is different from that of the shade 38A.

That is, the upward reflecting surface 38Ba of the shade 38B is formed of a horizontal plane including the optical axis Ax2, and its front edge 38Ba1 is formed to extend linearly from the rear focal point F2 of the projection lens 32B toward both left and right sides. ing. The upward reflecting surface 38Ba is set to have a narrower width in the lamp front-rear direction than the upward reflecting surface 38Aa of the shade 38A (specifically, 1/2 or less), and the rear end edge 38Ba2 is set to a width smaller than that of the upward reflecting surface 38Aa of the shade 38A. The reflective surface 36Ba is formed to extend linearly in the left-right direction on the front side of the lamp from the front edge 36Ba1 of the reflective surface 36Ba.

A first additional reflective surface 36Bb that reflects the light emitted from the light source 34B toward the front end of the upward reflective surface 38Ba of the shade 38B is formed at the front end of the reflector 36B. The first additional reflective surface 36Bb is formed such that its front edge 36Bb1 is located on the rear side of the lamp rather than the rear edge 38Ba2 of the upward reflective surface 38Ba of the shade 38B. 36B so that they do not overlap.

At a position in front of the lamp and below the upward reflecting surface 38Ba of the shade 38B, there is a second lens which reflects the emitted light from the light source 34B reflected by the first additional reflecting surface 36Bb of the reflector 36B toward the projection lens 32B. An additional reflective surface 38Bb is formed. The second additional reflective surface 38Bb is composed of an inclined surface that extends obliquely downward toward the front of the lamp from a position near the lower side of the front edge 38Ba1 of the upward reflective surface 38Ba, and extends along the front edge 38Ba1 of the upward reflective surface 38Ba. It is formed to extend in a planar shape in the left-right direction.

The lamp unit assembly 20 has a structure in which the substrates 40A and 40B of the first and second lamp units 30A and 30B are supported by a metal heat sink 50, and this heat sink 50 is supported by a resin holder 60. There is.

The holder 60 includes a horizontal flange portion 60a that extends along a horizontal plane so as to surround the outer peripheral edges of the reflectors 36A and 36B in the first and second lamp units 30A and 30B. The two reflectors 36A and 36B are integrally formed with the holder 60.

The heat sink 50 includes a main body 52 extending in the left-right direction along a horizontal plane, and a plurality of heat radiation fins 54 formed to extend downward from the lower surface of the main body 52. are spaced apart in the direction. The heat sink 50 is supported by the holder 60 with its main body 52 in contact with the horizontal flange 60a of the holder 60 from below.

The shades 38A and 38B of the first and second lamp units 30A and 30B are also formed integrally with the holder 60.

The projection lenses 32A and 32B of the first and second lamp units 30A and 30B are integrally formed as a projection lens assembly 22 and supported by a holder 60.

That is, a frame portion 60b is formed at the front end of the holder 60 and extends along a vertical plane perpendicular to the front-rear direction of the lamp. The frame portion 60b is formed in a horizontally elongated U-shape when viewed from the front of the lamp, and has an L-shaped cross-section. The projection lens assembly 22 is supported by the holder 60 with the peripheral edges of the rear surfaces of the two projection lenses 32A and 32B in contact with the frame portion 60b of the holder 60 from the front side of the lamp.

As described above, the lamp unit assembly 20 has a structure in which the reflectors 36A, 36B and the shades 38A, 38B of the first and second lamp units 30A, 30B and the holder 60 are integrally formed. 36A, 36B, shades 38A, 38B, and holder 60 do not have overlapping parts in plan view, so when molding these as a single injection molded product, the structure of the mold used for this is simple. Become.

When the lamp unit assembly 20 is assembled into the vehicle lamp 10, the optical axes Ax1 and Ax2 of the first and second lamp units 30A and 30B are 0.5 to 0.6 oriented toward the front of the lamp with respect to the horizontal plane. It is arranged in such a way that it extends downward by about 100 degrees.

FIG. 6 is a perspective view of the low beam light distribution pattern PL formed by the irradiation light from the vehicle lamp 10.

As shown in FIG. 6, the low beam light distribution pattern PL is a left-hand low beam light distribution pattern, and has cut-off lines CL1 and CL2 at different levels on the left and right sides at its upper edge. These cutoff lines CL1 and CL2 extend horizontally at different levels on the left and right, with the VV line passing vertically through HV, which is the vanishing point in the front direction of the lamp, as the border, and are located on the right side of the VV line. A portion is formed as the oncoming lane side cut-off line CL1, and a portion to the left of the V-V line is formed as the own lane side cut-off line CL2, which is stepped up from the oncoming lane side cut-off line CL1 via an inclined part. has been done.

In the low beam light distribution pattern PL, the elbow point E, which is the intersection of the oncoming lane side cutoff line CL1 and the line VV, is located approximately 0.5 to 0.6 degrees below HV. This is because the optical axes Ax1 and Ax2 of the first and second lamp units 30A and 30B extend downward by about 0.5 to 0.6 degrees toward the front of the lamp with respect to the horizontal plane. .

The low beam light distribution pattern PL is formed as a composite light distribution pattern of the main area light distribution pattern PA and the diffused area light distribution pattern PB, and furthermore, an OHS irradiation pattern is provided in the space above the cutoff lines CL1 and CL2. A light pattern PC is additionally formed. At this time, the main area light distribution pattern PA is formed by the irradiation light from the first lamp unit 30A, and the diffusion area light distribution pattern PB and the OHS irradiation light distribution pattern PC are formed by the irradiation light from the second lamp unit 30B. It is beginning to form.

The main area light distribution pattern PA is a light distribution pattern that constitutes the main area of the low beam light distribution pattern PL, and the cutoff lines CL1 and CL2 including the elbow point E are formed by this main area light distribution pattern PA. It is now possible to do so.

Specifically, the main area light distribution pattern PA uses the projection lens 32A to form a light source image of the light source 34A on the rear focal plane of the projection lens 32A by the emitted light from the light source 34A reflected by the reflector 36A. It is formed by projecting it as a reverse projection image onto the virtual vertical screen, and the cutoff lines CL1 and CL2 are formed as a reverse projection image of the front edge 38Aa1 of the upward reflecting surface 38Aa in the shade 38A. At this time, since the upward reflecting surface 38Aa is formed with a relatively wide front-to-back width, the main area light distribution pattern PA is formed as a light distribution pattern that is sufficiently bright in areas near the cutoff lines CL1 and CL2. ing.

The diffusion region light distribution pattern PB is a light distribution pattern that constitutes the diffusion region of the low beam light distribution pattern PL, and is formed as a horizontally elongated light distribution pattern.

At this time, in the second lighting unit 30B, the projection lens 32B is formed in the shape of a cylindrical lens extending in the left-right direction, and the upward reflecting surface 38Ba of the shade 38B is constituted by a horizontal plane including the optical axis Ax2, so that the light is diffused. The area light distribution pattern PB is formed so that its upper edge PBa extends in the horizontal direction at substantially the same height as the cut-off line CL1 on the opposite lane side. In addition, since the upward reflecting surface 38Ba of the shade 38B is formed with a narrower width from front to back than the upward reflecting surface 38Aa of the shade 38A, the light distribution pattern PB for the diffusion area is mainly bright in the area near its upper edge PBa. This is more suppressed than the area light distribution pattern PA.

Note that since the reflector 36B of the second lamp unit 30B has a smaller reflecting surface shape than the reflector 36A of the first lamp unit 30A, the accuracy of reflected light control decreases accordingly; however, in the light distribution pattern PB for the diffused area Since a dense light distribution like the main area light distribution pattern PA is not required, a desired light distribution pattern can be formed even if the shape of the reflective surface of the reflector 36B is made small.

The light distribution pattern PC for OHS illumination is a light distribution pattern for illuminating the overhead sign OHS installed above the road surface in front of the vehicle, and is a light distribution pattern for illuminating the overhead sign OHS installed above the road surface in front of the vehicle. It is formed as a horizontally elongated light distribution pattern that spreads in the left and right directions with the center at the center.

In the OHS irradiation light distribution pattern PC, after the emitted light from the light source 34B is reflected downward by the first additional reflective surface 36Bb of the reflector 36B and reflected toward the front of the lamp by the second additional reflective surface 38Bb of the shade 38B, It is formed by irradiating the lamp forward through the projection lens 32B. The light distribution pattern PC for OHS irradiation has a brightness that is suppressed more than the light distribution pattern PA for the main area and the light distribution pattern PB for the diffused area.

Next, the effects of this embodiment will be explained.

The vehicle lamp 10 according to the present embodiment includes a first lamp unit 30A configured to form a main area of a low beam light distribution pattern PL, and a first lamp unit 30A configured to form a diffusion area of the low beam light distribution pattern PL. Since the low beam light distribution pattern PL is provided with the second lamp unit 30B, it is possible to easily form the low beam light distribution pattern PL with a light distribution suitable for vehicle running.

At that time, the first and second lighting units 30A, 30B emit light from the light sources 34A, 34B reflected by the reflectors 36A, 36B by the shades 38A, 38B arranged between the reflectors 36A, 36B and the projection lenses 32A, 32B. Although the configuration is such that a part of the emitted light is blocked to form cutoff lines CL1 and CL2 of the low beam light distribution pattern PL, the shades 38A and 38B are provided with projection lenses 32A and 32A, respectively, which transmit the reflected light from the reflectors 36A and 36B. Since the upward reflecting surfaces 38Aa and 38Ba are formed to reflect the light upward toward the light source 32B, it is possible to increase the luminous flux utilization rate for the light emitted from the light sources 34A and 34B.

Furthermore, in the second lighting unit 30B, a first additional reflective surface 36Bb is formed at the front end of the reflector 36B to reflect the emitted light from the light source 34B toward the front end of the upward reflective surface 38Ba of the shade 38B. , a second additional reflective surface 38Bb that reflects the emitted light from the light source 34B reflected by the first additional reflective surface 36Bb toward the projection lens 32B, at a position on the front side of the lamp and lower than the upward reflective surface 38Ba of the shade 38B. Since the reflector 36B and the shade 38B are integrally formed, the following effects can be obtained.

That is, in the second lamp unit 30B, the light reflected from the first additional reflective surface 36Bb of the reflector 36B is reflected toward the projection lens 32B by the second additional reflective surface 38Bb of the shade 38B, thereby changing the low beam light distribution pattern PL. When forming the light distribution pattern PC for OHS irradiation, it is possible to form the light distribution pattern PC for OHS irradiation in the space above the cutoff lines CL1 and CL2. At this time, since the second lamp unit 30B is configured to form a diffusion area of the low beam light distribution pattern PL, even if the upward reflecting surface 38Ba of the shade 38B is configured to have a narrow width in the front and rear direction of the lamp, the light will be diffused. It becomes possible to form the area light distribution pattern PB with a desired light distribution. Therefore, it is possible to easily mold the second lamp unit 30B even if the reflector 36B and the shade 38B are integrally formed, thereby reducing the number of parts of the vehicle lamp 10. can.

As described above, according to the present embodiment, in the vehicle lamp 10 including the first and second lamp units 30A and 30B for forming the low beam light distribution pattern PL, the number of parts of the vehicle lamp 10 can be increased. It is possible to form the light distribution pattern PC for OHS irradiation without using any of the above methods.

Moreover, in this embodiment, the reflector 36A and shade 38A of the first lamp unit 30A and the reflector 36B and shade 38B of the second lamp unit 30B are integrally formed, so that the following effects can be obtained. Can be done.

That is, since the function for forming the light distribution pattern PC for OHS irradiation is given to the second lamp unit 30B, such a function is provided to the first lamp unit 30A that forms the light distribution pattern PA for the main area. This becomes unnecessary, and the reflector 36A and shade 38A can easily be formed integrally. Therefore, even if these are formed integrally with the reflector 36B and the shade 38B of the second lamp unit 30B, it is easily possible to mold them, thereby further reducing the number of parts of the vehicle lamp 10. can.

Further, in this embodiment, since the reflector 36B of the second lighting unit 30B has a smaller reflective surface shape than the reflector 36A of the first lighting unit 30A, each of the first and second lighting units 30A, 30B The vehicle lamp 10 can be made smaller while maintaining the required light distribution function.

Furthermore, in this embodiment, the projection lens 32A of the first lamp unit 30A and the projection lens 32B of the second lamp unit 30B are integrally formed as the projection lens assembly 22, so that the number of parts of the vehicle lamp 10 can be reduced. Further reductions can be achieved.

In the embodiment described above, the shade 38A of the first lamp unit 30A is formed such that the front edge 38Aa1 and the rear edge 38Aa2 of the upward reflecting surface 38Aa curve and extend toward the front side of the lamp toward both left and right sides. Although the explanation has been made as follows, it is also possible to adopt a configuration in which these are formed so as to extend linearly toward both the left and right sides.

In the above embodiment, the shade 38B of the second lighting unit 30B is described as being formed so that the front edge 38Ba1 and the rear edge 38Ba2 of the upward reflecting surface 38Ba extend linearly toward both left and right sides. However, it is also possible to adopt a configuration in which these are formed so as to curve and extend toward the front side of the lamp toward both left and right sides.

In the above embodiment, the second lamp unit 30B is arranged on the left side of the first lamp unit 30A as the lamp unit assembly 20, but it is arranged on the right side of the first lamp unit 30A. Even in this case, the same effects as in the case of the above embodiment can be obtained. When such a configuration is adopted, the lamp unit assembly can be made suitable for a vehicle lamp disposed at the right front end of the vehicle.

Next, a modification of the above embodiment will be described.

FIG. 7 is a diagram similar to FIG. 2, showing a lamp unit assembly 120 of a vehicle lamp according to this modification.

As shown in FIG. 7, the lamp unit assembly 120 according to the present modification is also a lamp unit assembly of a vehicle lamp disposed at the left front end of the vehicle, and the configuration of the first lamp unit 130A is the same as that described above. Although the configuration is substantially the same as that of the embodiment, the configuration of the second lamp unit 130B is partially different from that of the above embodiment.

That is, the first lighting unit 130A has a configuration including a projection lens 132A, a light source 134A, a reflector 136A, and a shade 138A similar to the first lighting unit 30A of the above embodiment.

On the other hand, in the second lamp unit 130B, the orientations of the light source 134B, reflector 136B, and shade 138B are different from those in the above embodiment, and the shape of the projection lens 132B is different from the above embodiment.

Specifically, in this modification as well, the light source 134B of the second lamp unit 130B is arranged closer to the front side of the lamp than the light source 134A of the first lamp unit 130A, but the light source 134B of the second lamp unit 130B and the reflector 136B The shade 138B is arranged so as to face in a direction inclined at a predetermined angle to the left with respect to the front direction of the lamp.

Also in this modification, the reflector 136B has a smaller reflective surface shape than the reflector 136A of the first lamp unit 130A, but both reflectors 136A and 136B are arranged in a positional relationship that partially overlaps when viewed from the front of the lamp. This embodiment differs from the above embodiment in that Therefore, the left end portion of the reflective surface 136Aa of the reflector 136A is partially missing, and a standing wall portion 136Ab that extends substantially vertically along the outer peripheral edge shape of the reflector 136B is formed in this portion.

As a result, in the reflective surface 136Aa of the reflector 136A, a region near the left end of the standing wall portion 136Ab located on the rear side of the lamp is hidden by the reflector 136B when viewed from the front of the lamp. However, since the reflective surface 136Aa of the reflector 136A is configured to reflect the emitted light from the light source 134A as light that converges in the left and right directions, the optical function will not be seriously impaired.

A first additional reflective surface 136Bb similar to the first additional reflective surface 36Bb of the embodiment described above is formed at the front end of the reflector 136B.

The upward reflecting surface 138Ba of the shade 138B is constituted by a horizontal plane including an optical axis Ax2 as an axis that passes through the light emission center of the light source 134B and extends in a direction inclined at a predetermined angle to the left with respect to the front direction of the lamp. Its longitudinal width is narrower than the upward reflecting surface 138Aa of the shade 138A.

The reflective surface 136Ba and the first additional reflective surface 136Bb of the reflector 136B are formed such that their front edges 136Ba1 and 136Bb1 are located on the rear side of the lamp rather than the rear edge 138Ba2 of the upward reflective surface 138Ba in the shade 138B. Therefore, the shade 138B and the reflector 136B are configured not to overlap in plan view.

A second additional reflective surface 138Bb, which is similar to the second additional reflective surface 38Bb of the embodiment described above, is formed in the shade 138B at a position forward of the lamp and lower than the upward reflective surface 138Ba.

In the lamp unit assembly 120, the substrates (not shown) of the first and second lamp units 130A and 130B are supported by a heat sink 150 similar to the heat sink 50 of the above embodiment, and this heat sink 150 is supported by a holder 160. The structure is as follows.

The holder 160 includes a horizontal flange portion 160a that extends along a horizontal plane so as to surround the outer peripheral edges of the reflectors 136A and 136B in the first and second lamp units 130A and 130B. The reflectors 136A, 136B and the shades 138A, 138B of the first and second lighting units 30A, 130B are integrally formed with the holder 160.

Also in this modification, the projection lenses 132A and 132B of the first and second lamp units 130A and 130B are supported by the holder 160 while being integrally formed as a projection lens assembly 122.

The projection lens 132A has the same configuration as the projection lens 32A of the above embodiment.

On the other hand, the projection lens 132B has the same vertical width as the projection lens 132A, and is formed to curve toward the rear of the lamp from its right end toward the left in a toroidal lens shape. That is, the front surface 132Ba of the projection lens 132B is formed to have a convex curved vertical cross section and extend in an arc shape, and the rear surface 132Bb is formed to have a cylindrical shape. The curvature of the front surface 132Ba of the projection lens 132B is set so that the rear focal point F2 in the vertical section including the optical axis Ax2 is located at the front edge 138Ba1 of the upward reflecting surface 138Ba of the shade 138B.

Also in this modification, a frame portion 160b substantially similar to the holder 60 of the above embodiment is formed at the front end of the holder 160. The projection lens assembly 122 is supported by the holder 160 with the peripheral edges of the rear surfaces of the two projection lenses 32A and 132B in contact with the frame portion 160b of the holder 160 from the front side of the lamp.

As described above, the lamp unit assembly 120 has a structure in which the reflectors 136A, 136B and the shades 138A, 138B of the first and second lamp units 130A, 130B are integrally formed with the holder 160. , 136B, the shades 138A, 138B, and the holder 160 have no overlapping parts in plan view, so when molding these as a single injection molded product, the structure of the mold used for this is simple. .

FIG. 8 is a perspective view showing a low beam light distribution pattern PL-1 formed by irradiation light from a vehicle lamp according to the present modification.

As shown by solid lines in FIG. 8, the low beam light distribution pattern PL-1 includes a main area light distribution pattern PA-1 and a diffused area light distribution pattern PB-, similar to the low beam light distribution pattern PL of the above embodiment. 1, and an OHS irradiation light distribution pattern PC-1 is additionally formed in the space above the cut-off lines CL1 and CL2.

At this time, the main area light distribution pattern PA-1 formed by the irradiation light from the first lamp unit 30A is substantially the same as in the above embodiment.

On the other hand, the light distribution pattern PB-1 for a diffusion region and the light distribution pattern PC-1 for OHS irradiation formed by the irradiation light from the second lamp unit 130B are different from the light distribution pattern PB for a diffusion region PB and the light distribution pattern for OHS irradiation of the above embodiment. The light distribution pattern PC is displaced leftward with respect to the light distribution pattern PC, and is formed in substantially the same shape as these.

Note that the light distribution pattern PB-1' for the diffusion area and the light distribution pattern PC-1' for OHS irradiation shown by the two-dot chain line in FIG. In the case where a vehicle lamp equipped with a lamp unit assembly whose left and right positions are reversed is placed at the right front end of the vehicle, the light distribution pattern formed by the light emitted from the second lamp unit is be.

The light distribution pattern PB-1' for the diffused area and the light distribution pattern PC-1' for the OHS irradiation are symmetrical with respect to the VV line with the light distribution pattern PB-1 for the diffused area and the light distribution pattern PC-1 for the OHS irradiation. The light distribution pattern will be formed as follows.

By forming the pair of left and right diffusion region light distribution patterns PB-1 and PB-1' to partially overlap, a light distribution pattern with wider diffusion is formed for the entire vehicle. becomes. In addition, since the left and right pair of OHS irradiation light distribution patterns PC-1 and PC-1' are formed to partially overlap, the overhead The OHS mark will be irradiated over a wide area and its visibility will be enhanced.

Also in this modification, since the reflector 136B of the second lighting unit 130B has a smaller reflecting surface shape than the reflector 136A of the first lighting unit 130A, it is necessary for each of the first and second lighting units 130A and 130B to It is possible to downsize vehicle lamps while maintaining the light distribution function.

In addition, in this modification, the light source 134B of the second lamp unit 130B is arranged on the front side of the lamp rather than the light source 134A of the first lamp unit 130A, and the reflector 136B of the second lamp unit 130B is located at the front side of the lamp when viewed from the front of the lamp. Since the reflector 136A of the 1-lamp unit 130A is arranged in a positional relationship that partially overlaps with the reflector 136A, the lateral width of the lamp unit assembly 120 can be narrowed, thereby making it possible to reduce the width of the vehicular lamp. Further downsizing can be achieved.

In the above modification, a second lamp unit having a symmetrical configuration with the second lamp unit 130B is additionally disposed on the right side of the first lamp unit 130A, thereby providing light distribution for the main area as a low beam light distribution pattern. It is also possible to adopt a configuration in which a pattern, a pair of left and right diffusion region light distribution patterns, and a left and right pair of OHS irradiation light distribution patterns are formed.

Note that the numerical values shown as specifications in the above embodiment and its modified examples are merely examples, and it goes without saying that these may be set to different values as appropriate.

Furthermore, the present invention is not limited to the configurations described in the above embodiments and modifications thereof, and configurations with various changes other than these can be adopted.

10 vehicle lamp 12 lamp body 14 transparent cover 20, 120 lamp unit assembly 22, 122 projection lens assembly 30A, 130A first lamp unit 30B, 130B second lamp unit 32A, 32B, 132A, 132B projection lens 32Aa, 32Ba, 132Ba Front surface 32Ab, 32Bb, 132Bb Rear surface 34A, 34B, 134A, 134B Light source 34Aa, 34Ba Light emitting surface 36A, 36B, 136A, 136B Reflector 36Aa, 36Ba, 136Aa, 136Ba Reflective surface 36Aa1, 36Ba1, 36Bb 1, 38Aa1, 38Ba1, 136Ba1, 136Bb1, 138Ba1 Front edge 36Bb, 136Bb First additional reflective surface 38A, 38B, 138A, 138B Shade 38Aa, 38Ba, 138Aa, 138Ba Upward reflective surface 38Aa2, 38Ba2, 138Ba2 Rear edge 38Bb, 138Bb Second additional reflective surface 40A ,40B Board 50, 150 Heat sink 52 Main body 54 Radiation fin 60, 160 Holder 60a, 160a Horizontal flange 60b, 160b Frame 136Ab Vertical wall Ax1, Ax2 Optical axis CL1 Opposite lane side cutoff line CL2 Own lane side cutoff line E Elbow point F1 , F2 Back focal point OHS Overhead sign PA, PA-1 Light distribution pattern for main area PB, PB-1, PB-1' Light distribution pattern for diffused area PBa Upper edge PC, PC-1, PC-1' OHS irradiation Light distribution pattern for PL, PL-1 Light distribution pattern for low beam

Claims (5)

In a vehicle lamp including first and second lamp units for forming a low beam light distribution pattern,
Each of the first and second lamp units includes a projection lens, a light source arranged on the rear side of the lamp with respect to a rear focal point of the projection lens, and a light source arranged so as to cover the light source from above. a reflector that reflects the emitted light from the light source toward the projection lens; and a reflector that is disposed between the reflector and the projection lens to form a cutoff line of the low beam light distribution pattern. a shade that blocks part of the reflected light, and the shade is provided with an upward reflecting surface that reflects the reflected light from the reflector upward toward the projection lens,
The first lamp unit is configured to form a main area of the low beam light distribution pattern, and the second lamp unit is configured to form a diffusion area of the low beam light distribution pattern,
In the second lighting unit, a first additional reflective surface is formed at the front end of the reflector to reflect the light emitted from the light source toward the front end of the upward reflective surface of the shade. A second additional reflective surface is formed at a position on the front side and lower side of the lamp than the reflective surface to reflect the emitted light from the light source reflected by the first additional reflective surface toward the projection lens. A vehicular lamp characterized in that the reflector and the shade are integrally formed. The vehicle lamp according to claim 1, wherein the reflector and shade of the first lamp unit and the reflector and shade of the second lamp unit are integrally formed. The light source of the second lamp unit is arranged on the front side of the lamp compared to the light source of the first lamp unit,
The reflector of the second lamp unit is arranged on the front side of the lamp relative to the reflector of the first lamp unit in a positional relationship that partially overlaps with the reflector of the first lamp unit when viewed from the front of the lamp. The vehicular lamp according to claim 2. 3. The vehicle lamp according to claim 2, wherein the reflector of the second lamp unit has a smaller reflective surface shape than the reflector of the first lamp unit. 5. The vehicle lamp according to claim 1, wherein the projection lens of the first lamp unit and the projection lens of the second lamp unit are integrally formed.

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