JP2013137980A - Vehicular lighting lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting lamp capable of forming a low-beam light distribution pattern by means of its irradiation light in a thin lamp structure and forming an OHS irradiation light distribution pattern at a position separated upward from its cutoff line, in the vehicular lighting lamp formed to emit light from a light-emitting element toward front of the lamp with a translucent member fitted to the front.SOLUTION: The light from the light-emitting element 12 is emitted from a front face 14a of the translucent member 14 after it is internally reflected at a front face 14a of the translucent member 14 ant then, internally reflected again at its rear face 14b. Then, a right and left pair of lens parts 14c for emitting part of light from the light-emitting element 12 which is internally reflected again at the rear face 14b of the translucent member 14 is formed on a peripheral region 14a2 of the front face 14a of the translucent member 14. Further, the OHS irradiation light distribution pattern is formed with the light emitted from the right and left pair of lens parts 14c.

Description

  The present invention relates to a vehicular illumination lamp configured to emit light from a light emitting element such as a light emitting diode to the front of the lamp by a translucent member disposed on the front side thereof.

  Conventionally, a light distribution pattern having a cut-off line at the upper end portion is formed by emitting light from a light emitting element arranged toward the front of the lamp to the front of the lamp by a translucent member arranged on the front side thereof. A vehicular illumination lamp configured as described above is known.

  In “Patent Document 1”, as such a vehicular illumination lamp, light emitted from a light emitting element is incident on a translucent member and internally reflected on the front surface thereof, and then internally reflected again on the rear surface thereof. A configuration in which light is emitted from the front surface is described.

  In that case, in the vehicular illumination lamp described in “Patent Document 1”, the front surface of the translucent member is configured to be a flat surface, and the outer peripheral side of the light incident area on which light from the light emitting element is incident on the rear surface. The annular region located at is composed of a plurality of curved surfaces, and the annular region is subjected to a reflection process.

JP 2011-1000069 A2

  By adopting the configuration described in “Patent Document 1”, it is possible to form a light distribution pattern having a cut-off line at the upper end portion after the vehicle illumination lamp is configured to be thin. The light distribution pattern can be used as a light distribution pattern for low beam or a light distribution pattern constituting a part thereof.

  By the way, it is preferable that a light distribution pattern for irradiating an overhead sign placed above the road surface in front of the vehicle is additionally formed as a low beam light distribution pattern. With the described configuration, it is difficult to form a light distribution pattern for irradiating an overhead marker at a position away from the cut-off line of the low beam light distribution pattern.

  The invention of the present application has been made in view of such circumstances, and is a vehicular illumination lamp configured to emit light from a light emitting element to the front of the lamp by a translucent member disposed on the front side thereof. The first light distribution pattern having a cut-off line at the upper end portion is formed by the irradiation light, and the second light distribution pattern is formed at a position away from the cut-off line. An object of the present invention is to provide a vehicular illumination lamp that can be formed.

  In the present invention, the above-described object is achieved by devising the configuration of the translucent member.

That is, the vehicular illumination lamp according to the first invention of the present application is:
A light emitting element disposed toward the front of the lamp, and a translucent member disposed on the front side of the lamp with respect to the light emitting element, and the light emitted from the light emitting element is incident on the translucent member to A first light distribution pattern having a cut-off line at the upper end is formed by reflecting the inner surface on the front surface of the light transmitting member, then reflecting the inner surface again on the rear surface of the light transmitting member and emitting the light from the front surface of the light transmitting member. In the vehicular illumination lamp configured to form,
The front surface of the translucent member is configured with a flat surface, and the annular region located on the outer peripheral side of the light incident region where the light from the light emitting element is incident on the rear surface of the translucent member is configured with a plurality of curved surfaces. ,
A reflection treatment is applied to the annular region,
A part of light from the light emitting element that has been internally reflected again on the rear surface of the translucent member so as to form a second light distribution pattern on the surface of the translucent member at a position away from the cut-off line. A lens unit or a reflection unit that emits light upward as it faces forward is provided.

Moreover, the vehicular illumination lamp according to the second invention of the present application is:
A light emitting element disposed toward the front of the lamp, and a translucent member disposed on the front side of the lamp with respect to the light emitting element, and the light emitted from the light emitting element is incident on the translucent member to A first light distribution pattern having a cut-off line at the upper end is formed by reflecting the inner surface on the front surface of the light transmitting member, then reflecting the inner surface again on the rear surface of the light transmitting member and emitting the light from the front surface of the light transmitting member. In the vehicular illumination lamp configured to form,
The front surface of the translucent member is configured by a rotating curved surface having a concave curved surface portion at the center, and an annular region located on the outer peripheral side of the light incident region on the rear surface of the translucent member on which light from the light emitting element is incident. It consists of multiple curved surfaces,
A reflection treatment is applied to the annular region,
A part of light from the light emitting element incident on the translucent member is directed forward of the lamp so that a second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line. And a lens portion that emits light as upward direct light.

  As long as the “light emitting element” is arranged toward the front of the lamp, the specific shape and size of the light emitting surface are not particularly limited.

  As long as the “first light distribution pattern” is a light distribution pattern having a cut-off line at the upper end, the specific shape is not particularly limited, and may be a low beam light distribution pattern. Or a light distribution pattern constituting a part thereof.

  If the “annular region” is configured so that the first light distribution pattern can be formed by the light that has been internally reflected again by the annular region, each of the plurality of curved surfaces constituting the annular region is specific. The specific surface shape and arrangement are not particularly limited.

  As long as the “second light distribution pattern” is a light distribution pattern formed at a position away from the cut-off line of the first light distribution pattern, its specific shape and formation position are particularly limited. It is not a thing.

  The specific arrangement of the “lens portion or the reflection portion” is not particularly limited as long as it is provided on the surface of the translucent member. In this case, both the “lens portion” and the “reflection portion” It is good also as a structure provided. In the case of the “lens part”, the lens part may be formed integrally with the translucent member or may be formed separately.

  As shown in the above configuration, the vehicular illumination lamp according to the first invention of the present application is configured such that light from a light emitting element disposed toward the front of the lamp is incident on a translucent member disposed on the front side thereof. The inner surface is reflected on the front surface, and then the inner surface is reflected again on the rear surface to be emitted from the front surface. The translucent member is configured to have a flat front surface and light incident on the rear surface. An annular region located on the outer periphery of the region is composed of a plurality of curved surfaces, and this annular region is subjected to reflection treatment, so the vehicle lighting fixture is made thin and cut off at the upper end. The 1st light distribution pattern which has can be formed.

  In addition, in the vehicular illumination lamp according to the first invention of the present application, the second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line of the first light distribution pattern. As described above, since a lens portion or a reflection portion is provided that emits a part of the light from the light emitting element that has been internally reflected again on the rear surface of the light transmitting member as upward light, it is provided above the road surface in front of the vehicle. It is possible to easily irradiate an overhead sign placed on the.

  The vehicular illumination lamp according to the second invention of the present application causes light from a light emitting element arranged toward the front of the lamp to be incident on a translucent member arranged on the front side and to be internally reflected on the front surface thereof. Then, the rear surface is again reflected from the inner surface and emitted from the front surface, but the translucent member is formed of a rotating curved surface having a concave curved surface portion in the center, and the rear surface. The annular region located on the outer peripheral side of the light incident region in FIG. 2 is composed of a plurality of curved surfaces, and the annular region is subjected to reflection treatment, so that the upper end portion of the vehicle illumination lamp is configured thinly A first light distribution pattern having a cut-off line can be formed.

  In addition, in the vehicular illumination lamp according to the second invention of the present application, the second light distribution pattern is formed on the surface of the translucent member at a position away from the cut-off line of the first light distribution pattern. As described above, since a lens portion or a reflection portion is provided that emits a part of the light from the light emitting element that has been internally reflected again on the rear surface of the light transmitting member as upward light, it is provided above the road surface in front of the vehicle. It is possible to easily irradiate an overhead sign placed on the.

  As described above, according to the present invention, in the vehicular illumination lamp configured to emit the light from the light emitting element to the front of the lamp by the translucent member disposed on the front side, the thin lamp configuration is provided. Thus, the first light distribution pattern having a cutoff line at the upper end portion can be formed by the irradiation light, and the second light distribution pattern can be formed at a position away from the cutoff line.

  In the above configuration, the light emitting element has a light emitting surface having a horizontally long rectangular shape, and the lens part or the reflecting part is formed in a cross region extending in a band shape in the vertical and horizontal directions with the light emitting element as the center in the front view of the lamp. With the provided configuration, the following operational effects can be obtained.

  That is, when the light emitting element has a horizontally elongated light emitting surface, among the light source images formed by the light reflected from the inner surface again by the annular region on the rear surface of the translucent member and emitted from the front surface, The light source image formed by the light emitted from the cross region extending in a strip shape in the vertical and horizontal directions with the light emitting element as the center when viewed from the front of the lamp is maintained in a shape that is nearly a horizontally long substantially rectangular shape.

  Therefore, if the cross section is provided with a lens portion or a reflection portion, the second light distribution pattern can be easily formed as a horizontally long light distribution pattern suitable for irradiation with overhead signs.

  In the above configuration, when the lens portion is formed on the front surface of the translucent member, the following operational effects can be obtained.

  That is, in the first invention of the present application, since the front surface of the translucent member is a flat surface, it is possible to easily form the lens portion with high accuracy by forming the lens portion on the front surface. On the other hand, in the second invention of the present application, since the front surface of the translucent member is constituted by a rotating curved surface having a concave curved surface portion at the center, even if a lens portion is formed on this front surface, It is possible to easily maintain the thin lamp structure by suppressing the forward protrusion amount.

  In the above configuration, if the lens unit is mounted as a separate lens member on the front surface of the translucent member, the front surface is configured as a flat surface in the first invention of the present application. Can be arranged. In addition, by configuring the lens portion with a lens member that is separate from the translucent member, it is possible to select whether or not the second light distribution pattern is formed depending on whether or not the lens member is attached.

  In the above configuration, when the reflecting portion is formed in the annular region on the rear surface of the translucent member, the above-described effects can be obtained without providing the projecting portion on the translucent member.

Front view showing a vehicular illumination lamp according to an embodiment of the first invention of the present application II-II sectional view of FIG. The perspective view which shows the translucent member of the said illumination lamp for vehicles The figure which shows transparently the light distribution pattern for low beams formed on the virtual vertical screen arrange | positioned in the position of 25 m ahead of a lamp | ramp by the light irradiated ahead from the said vehicle lighting lamp. The same figure as FIG. 1 which shows the 1st modification of the said embodiment. Sectional view taken along line VI-VI in FIG. The perspective view which shows the translucent member of the said 1st modification. The same figure as FIG. 1 which shows the 2nd modification of the said embodiment. IX-IX sectional view of FIG. The perspective view which shows the translucent member of the said 2nd modification. The figure similar to FIG. 2 which shows the vehicle lighting device which concerns on one Embodiment of this-application 2nd invention The figure similar to FIG. 2 which shows the vehicle lighting device which concerns on the 1st modification of one Embodiment of this invention 2nd invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, an embodiment of the first invention of the present application will be described.

  FIG. 1 is a front view showing a vehicular illumination lamp 10 according to the present embodiment. 2 is a cross-sectional view taken along line II-II in FIG.

  As shown in these drawings, the vehicular illumination lamp 10 according to the present embodiment is a lamp unit disposed at the front end portion of the vehicle, and in front of the lamp near the point A on the optical axis Ax extending in the front-rear direction of the lamp. The light-emitting element 12 disposed toward the light-emitting element, the translucent member 14 disposed on the front side of the lamp with respect to the light-emitting element 12, a metal support plate 16 that supports the light-emitting element 12, and the support plate 16 It has a configuration including a metal heat sink 18 fixed to the rear surface.

  The vehicular illumination lamp 10 causes the light emitted from the light emitting element 12 to be incident on the light transmitting member 14 and internally reflected by the front surface 14 a of the light transmitting member 14, and then the rear surface 14 b of the light transmitting member 14. Then, the light is again reflected from the inner surface and emitted from the front surface 14a of the translucent member 14, thereby forming a light distribution pattern for low beam distribution PL of left light as shown in FIG.

  The light emitting element 12 is a white light emitting diode, and includes four light emitting chips 12a arranged in a row in a horizontal direction so as to have a horizontally long rectangular shape, and a substrate 12b that supports them.

  The four light emitting chips 12a are arranged so as to be in close contact with each other, and the front surfaces thereof are sealed with a thin film, thereby constituting a light emitting surface that emits light in a horizontally long rectangular shape when viewed from the front of the lamp. . At this time, each light emitting chip 12a has a square outer shape of about 1 × 1 mm, and thus the light emitting surface has an outer shape of about 1 × 4 mm.

  The light emitting element 12 has the lower end edge of the light emitting surface positioned on a horizontal line orthogonal to the optical axis Ax at the point A, and the end point on the own lane side (right side in the front view of the lamp) at the lower end edge. It is arranged so as to be located on the own lane side with respect to the axis Ax and in the vicinity of the optical axis Ax (specifically, for example, a position about 0.3 to 1.0 mm away from the optical axis Ax).

  FIG. 3 is a perspective view showing the translucent member 14.

  As shown in the figure, the translucent member 14 is made of a transparent synthetic resin molded product such as an acrylic resin molded product, and has a circular outer shape when viewed from the front of the lamp. At this time, the outer diameter dimension of the translucent member 14 is set to a value of about φ100 mm.

  The front surface 14a of the translucent member 14 is configured by a plane orthogonal to the optical axis Ax, and the central region 14a1 is subjected to a reflection process such as aluminum vapor deposition, whereby a reflection film 22 is formed. Yes.

  This central region 14a1 is a circular region centered on the optical axis Ax, and the position of the outer peripheral edge is the light from the light emitting element 12 that has reached the front surface 14a of the translucent member 14 (more precisely, from the point A). The incident angle of light is set in the vicinity of the critical angle. As a result, the light from the light emitting element 12 that has reached the front surface 14a of the translucent member 14 is internally reflected by the reflection surface that has been subjected to the reflection treatment in the central region 14a1, and is more peripheral than the central region 14a1. In the peripheral region 14a2 located on the side, the inner surface is reflected by total reflection.

  On the other hand, the rear surface 14b of the translucent member 14 includes a light incident region 14b1, a planar region 14b2, and an annular region 14b3.

  The light incident region 14b1 is a region located in the vicinity of the optical axis Ax, and is formed so as to surround the point A in a hemispherical shape from the front side of the lamp, so that the emitted light from the point A is not refracted. It is made to enter into the translucent member 14.

  The planar region 14b2 is a region surrounding the light incident region 14b1 in an annular shape so as to be adjacent to the outer peripheral side of the light incident region 14b1, and is configured by a plane orthogonal to the optical axis Ax. The heat sink 18 is fixedly supported by the translucent member 14 in the planar region 14b2. The heat sink 18 has a configuration in which a plurality of heat radiating fins 18a are formed on the rear surface thereof.

  The annular region 14b3 is a region that annularly surrounds the planar region 14b2 so as to be adjacent to the outer peripheral side of the planar region 14b2, and is configured by a plurality of curved surfaces. At this time, each of the plurality of curved surfaces is formed with a rotational paraboloid with the optical axis Ax as the central axis as a reference plane and a position that is plane-symmetric with respect to the point A with respect to the front surface 14a of the translucent member 14. Has been.

  The annular region 14b3 is subjected to a reflection process such as aluminum vapor deposition, whereby a reflection film 24 is formed. And the light from the light emitting element 12 internally reflected by the front surface 14a of the translucent member 14 is again internally reflected in the annular region 14b3.

  The plurality of curved surfaces constituting the annular region 14b3 are a reflection region Z1 located on the upper right side of the optical axis Ax (upper left in the lamp front view, the same applies hereinafter), a reflection region Z2 located on the upper side of the optical axis Ax, A reflection region Z3 located on the upper left side of the optical axis Ax, a reflection region Z4 located on the left side of the optical axis Ax, a reflection region Z5 located on the lower left side of the optical axis Ax, and a lower side of the optical axis Ax The area is divided into a reflection area Z6, a reflection area Z7 located on the lower right side of the optical axis Ax, and a reflection area Z8 located on the right side of the optical axis Ax.

  In the peripheral region 14a2 of the front surface 14a of the translucent member 14, the inner surface is reflected again in the annular region 14b3 of the rear surface 14b of the translucent member 14 at a position slightly below the horizontal plane including the optical axes Ax on both the left and right sides of the optical axis Ax. A pair of lens portions 14c are formed for emitting the light from the light emitting element 12 toward the front of the lamp as slightly upward light. At that time, the pair of left and right lens portions 14c are located in front of the lower end portions of the reflection regions Z4 and Z8 in the annular region 14b3.

  Each of the lens portions 14c is formed in a horizontally long outer shape so as to protrude from the front surface 14a, and has a substantially spherical surface shape. Each of the lens portions 14c has a part of the light from the light emitting element 12 incident on the translucent member 14 as diffused light that slightly diffuses upward slightly in the vertical direction and on both the left and right sides in the horizontal direction. The light is emitted as light that diffuses to some extent.

  FIG. 4 is a perspective view showing a low beam light distribution pattern PL formed on a virtual vertical screen arranged at a position 25 m ahead of the lamp by light irradiated forward from the vehicular illumination lamp 10.

  As shown in the figure, this low beam light distribution pattern PL is a left light distribution light beam distribution pattern as described above, and has horizontal and oblique cut-off lines CL1 and CL2 at the upper end thereof. . At that time, a horizontal cut-off line CL1 is formed on the opposite lane side with respect to the V-V line that is a vertical line passing through HV that is a vanishing point in the front direction of the vehicle, and an oblique cut-off line CL2 on the own lane side. Is formed. And the elbow point E which is the intersection of both cut-off lines CL1 and CL2 is located about 0.5 to 0.6 ° below HV, and the high luminous intensity region is in the vicinity of the elbow point E on the own lane side. A hot zone HZ is formed.

  This low beam light distribution pattern PL is formed as a combined light distribution pattern of three light distribution patterns PL1, PL2, and PL3.

  The light distribution pattern PL1 is a light distribution pattern formed by reflected light from the reflection region Z1 located on the upper right side of the optical axis Ax, and the light distribution pattern PL2 is above, to the left, below, to the right of the optical axis Ax. Is a light distribution pattern formed by reflected light from four reflection regions Z2, Z4, Z6, and Z8 located in the direction, and the light distribution pattern PL3 is located at the upper left, lower left, and lower right of the optical axis Ax. It is a light distribution pattern formed by the reflected light from the three reflective regions Z3, Z5, and Z7.

  At that time, the light distribution pattern PL1 is formed as a small and bright light distribution pattern for forming the oblique cut-off line CL2, and the light distribution pattern PL2 is relatively small and relatively bright for forming the horizontal cut-off line CL1. It is formed as a light distribution pattern, and the light distribution pattern PL3 is formed as a light distribution pattern for forming a diffusion region that diffuses greatly in the left-right direction below the horizontal cutoff line CL1.

  This low beam light distribution pattern PL is for OHS irradiation for irradiating overhead signs (ie, overhead signs) OHS installed above the road surface in front of the vehicle at positions away from both of the cut-off lines CL1 and CL2. A light distribution pattern PA is formed.

  This light distribution pattern PA for OHS irradiation is reflected by the front surface 14a of the translucent member 14 and reflected from the light emitting element 12 again by the annular region 14b3 of the rear surface 14b. It is a light distribution pattern formed by light emitted from the pair of lens portions 14c, and is formed as a horizontally long and light light distribution pattern that extends to the left and right sides around the VV line.

  Next, the effect of this embodiment is demonstrated.

  The vehicular illumination lamp 10 according to the present embodiment causes light from the light emitting element 12 arranged toward the front of the lamp to enter the translucent member 14 arranged on the front side thereof, and to internally reflect the light on the front surface 14a. After that, the rear surface 14b reflects the inner surface again and emits the light from the front surface 14a. However, the translucent member 14 has a front surface 14a formed of a flat surface and a light incident area on the rear surface 14b. An annular region 14b3 located on the outer peripheral side of 14b1 is formed by a plurality of curved surfaces, and the annular region 14b3 is subjected to a reflection treatment. A low beam light distribution pattern PL as a first light distribution pattern having a cut-off line can be formed.

  In addition, in the vehicular illumination lamp 10 according to the present embodiment, in the peripheral region 14a2 of the front surface 14a of the translucent member 14, at a position away from the cut-off lines CL1 and CL2 of the low beam light distribution pattern PL. A portion of the light from the light emitting element 12 that has been internally reflected again by the rear surface 14b of the translucent member 14 is directed upward to form the OHS irradiation light distribution pattern PA as the second light distribution pattern. As a pair of left and right lens portions 14c to be emitted is formed, it is possible to easily irradiate an overhead sign OHS installed above the road surface in front of the vehicle.

  As described above, according to the present embodiment, in the vehicular illumination lamp 10 configured to emit the light from the light emitting element 12 to the front of the lamp by the translucent member 14 disposed on the front side thereof, a thin lamp is provided. In addition to the configuration, the low-beam light distribution pattern PL can be formed by the irradiation light, and the OHS irradiation light distribution pattern PA can be formed at a position away from the cut-off lines CL1 and CL2.

  In the present embodiment, a pair of left and right lens portions 14c are formed on the front surface 14a of the translucent member 14, but the front surface 14a is formed of a flat surface, so that each lens portion 14c is formed with high accuracy. Is easily possible.

  At that time, in the vehicular illumination lamp 10 according to the present embodiment, the light emitting element 12 has a light emitting surface having a horizontally long substantially rectangular shape, and a pair of left and right lens portions 14c are provided on both the left and right sides of the optical axis Ax. Since it is located in front of the reflection areas Z4 and Z8, the following operational effects can be obtained.

  That is, when the light emitting element 12 has a horizontally elongated light emitting surface as described above, the light is reflected from the inner surface again by the annular region 14b3 of the rear surface 14b of the translucent member 14 and emitted from the front surface 14a. Among the light source images to be formed, a light source image formed by light emitted from a cross region extending in a strip shape in the vertical and horizontal directions around the light emitting element 12 (more precisely, the optical axis Ax) in the front view of the lamp, The shape is maintained in a shape that is close to a horizontally long and substantially rectangular shape.

  In the present embodiment, among the annular region 14b3 of the rear surface 14b of the translucent member 14, the light that has been internally reflected again by the four reflective regions Z2, Z4, Z6, and Z8 extending in a strip shape in the vertical and horizontal directions is the cross region. The pair of left and right lens portions 14c are located in front of the pair of left and right reflection areas Z4 and Z8, and thus the OHS irradiation light distribution pattern PA is irradiated with the overhead marker OHS. It can be easily formed as a horizontally long light distribution pattern suitable for the above.

  In the above-described embodiment, the pair of left and right lens portions 14c are described as being formed at the lower end portions of the pair of left and right reflection regions Z4 and Z8 in the peripheral region 14a2 of the front surface 14a of the translucent member 14. Even in the case where the other regions in each of the reflection regions Z4 and Z8 or the structure formed in the reflection region Z2 and the reflection region Z6 are used, substantially the same functions and effects as in the above embodiment can be obtained.

  In the above-described embodiment, the pair of left and right lens portions 14c is formed in the peripheral region 14a2 of the front surface 14a of the translucent member 14, but a configuration in which only one of the lens portions 14c is formed is also possible. It is.

  In the above embodiment, the light emitting element 12 has been described as having a horizontally long rectangular light emitting surface, but it is of course possible to have a light emitting surface having a shape other than this.

  In the above embodiment, the first light distribution pattern is described as being configured to form the left light distribution light beam distribution pattern PL, but the right light distribution light beam distribution pattern or fog lamp Even in a case where the light distribution pattern is formed, the same effects as those of the above embodiment can be obtained by adopting the same structure as that of the above embodiment.

  In the said embodiment, although demonstrated as what was comprised so that the light distribution pattern PA for OHS irradiation might be formed as a 2nd light distribution pattern, it was comprised so that a light distribution pattern other than this might be formed It is also possible.

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

  First, a first modification of the above embodiment will be described.

  FIG. 5 is a view similar to FIG. 1 showing the vehicular illumination lamp 110 according to this modification. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5, and FIG. 7 is a perspective view showing the translucent member 114 of the vehicular illumination lamp 110.

  As shown in these drawings, the vehicular illumination lamp 110 is different in part of the configuration of the translucent member 114 from the above embodiment.

  In other words, in the present modification, the pair of left and right lens portions 14c in the translucent member 14 of the above embodiment is configured as a separate member.

  Specifically, in the present modification, the pair of left and right lens portions 14c as in the above embodiment is not formed on the front surface 114a of the translucent member 114, and instead, functions similar to these are performed. A pair of left and right lens members 120 are fixed to the front surface 114a of the translucent member 114 with an adhesive, a holding member, or the like.

  In the pair of left and right lens members 120, a part of the light from the light emitting element 12 that has been internally reflected again by the annular region 114b3 of the rear surface 114b of the translucent member 114 is emitted upward as light upward. Thus, an OHS irradiation light distribution pattern PA as shown in FIG. 4 is formed.

  At this time, the pair of left and right lens members 120 are fixed on a horizontal plane including the optical axes Ax on the left and right sides of the optical axis Ax in the peripheral region 114a2 of the front surface 114a of the translucent member 114. That is, the pair of left and right lens members 120 are located in front of the reflection areas Z4 and Z8 located on the left and right sides of the optical axis Ax.

  Even in the case of adopting the configuration of the present modification, it is possible to obtain the same operational effects as in the case of the above embodiment.

  In addition, as in the present modification, the lens unit is configured by the lens member 120 that is separate from the translucent member 114, so that whether or not the OHS irradiation light distribution pattern PA is formed depends on whether or not the lens member 120 is attached. You can choose.

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

  FIG. 8 is a view similar to FIG. 1 showing a vehicular illumination lamp 210 according to this modification. 9 is a cross-sectional view taken along the line IX-IX in FIG. 8, and FIG. 10 is a perspective view showing the translucent member 214 of the vehicular illumination lamp 210.

  As shown in these drawings, the vehicular illumination lamp 210 is different in part of the configuration of the translucent member 214 from the above embodiment.

  That is, in this modification, the pair of left and right lens portions 14c as in the above embodiment is not formed on the front surface 214a of the translucent member 214, and instead, the annular surface of the rear surface 214b of the translucent member 214 is formed. A pair of left and right reflecting portions 214d is formed in the region 214b3. At this time, the pair of left and right reflecting portions 214d are located at the lower ends of the reflecting regions Z4 and Z8 located on the left and right sides of the optical axis Ax in the annular region 214b3.

  Then, a part of the light from the light emitting element 12 which is internally reflected again by the annular region 214b3 of the rear surface 214b of the translucent member 214 is reflected slightly upward in the pair of left and right reflecting portions 214d, and this is translucent. By emitting light upward from the front surface 214a of the member 214, an OHS irradiation light distribution pattern PA as shown in FIG. 4 is formed.

  Even in the case of adopting the configuration of the present modification, it is possible to obtain the same operational effects as in the case of the above embodiment.

  Moreover, as in this modification, a pair of left and right reflecting portions 214d for forming the OHS irradiation light distribution pattern PA is formed in the annular region 214b3 of the rear surface 214b of the light transmitting member 214. The above-described effects can be obtained without providing a projecting portion on the translucent member 214.

  Next, an embodiment of the second invention of the present application will be described.

  FIG. 11 is a front view showing the vehicular illumination lamp 310 according to the present embodiment.

  As shown in the figure, the vehicular illumination lamp 310 according to the present embodiment has the same basic configuration as the vehicular illumination lamp 10 according to the embodiment of the first invention of the present application. The surface shapes of the front surface 314a and the rear surface 314b of the member 314 are different from those of the translucent member 14 of the vehicular illumination lamp 10.

  That is, in the vehicular illumination lamp 310 according to the present embodiment, the front surface 314a of the translucent member 314 is constituted by a rotating curved surface having a concave curved surface portion 314aA at the center. At this time, the rotational curved surface is formed as a smooth curved surface with the optical axis Ax as the rotational axis.

  Also in the vehicular illumination lamp 310, the light emitted from the light emitting element 12 is incident on the translucent member 314 and is internally reflected by the front surface 314a of the translucent member 314, and then the rear surface of the translucent member 314 The inner light is again reflected by 314b and emitted from the front surface 314a of the translucent member 314, thereby forming a light distribution pattern PL for the left beam as shown in FIG.

  In order to achieve this, also in the vehicular illumination lamp 310, as in the vehicular illumination lamp 10, the annular region 314b3 in which the reflective film 24 is formed on the rear surface 314b of the translucent member 314 is configured by a plurality of curved surfaces. ing. At this time, each of the plurality of curved surfaces causes the light from the point A of the light emitting element 12 reflected on the inner surface by the front surface 314a of the translucent member 314 to be internally reflected again, and then from the front surface 314a to the direction parallel to the optical axis Ax. A rotating curved surface whose shape is set so as to emit light is formed as a reference surface.

  Also in the vehicular illumination lamp 310, similarly to the vehicular illumination lamp 10, the central region 314a1 (that is, the central portion of the concave curved surface portion 314aA) on the front surface 314a of the translucent member 314 is subjected to reflection treatment. Thus, the reflection film 22 is formed.

  This central region 314a1 is a circular region centered on the optical axis Ax, similar to the central region 14a1 of the vehicular illumination lamp 10, and the position of its outer peripheral edge is the light emission that has reached the front surface 314a of the translucent member 314. The incident angle of the light from the element 12 (more precisely, the light from the point A) is set near the position where the critical angle is obtained. At this time, since the front surface 314a of the translucent member 314 is formed by a rotating curved surface having a concave curved surface portion 314aA at the center, the outer peripheral edge of the central region 314a1 is the case of the central region 14a1 of the vehicular illumination lamp 10 It is located closer to the optical axis Ax.

  Further, since the outer peripheral edge of the central region 314a1 on the front surface 314a of the translucent member 314 is positioned closer to the optical axis Ax in this way, the reflection from the annular region 314b3 of the rear surface 314b of the translucent member 314 is accordingly made. It becomes difficult for light to enter the central region 314a1. For this reason, the inner peripheral edge of the annular region 314b3 is also located closer to the optical axis Ax than in the annular region 14b3 of the vehicular illumination lamp 10.

  Also in the translucent member 314 of this embodiment, a lens portion 314c similar to the lens portion 14c in the translucent member 14 of one embodiment of the first invention of the present application is formed.

  That is, in the annular region 314b3 of the rear surface 314b of the translucent member 314, the position is slightly below the horizontal plane including the optical axes Ax on the left and right sides of the optical axis Ax in the peripheral region 314a2 of the front surface 314a of the translucent member 314. A pair of lens portions 314c are formed that emit light from the light-emitting element 12 that has been internally reflected toward the front of the lamp as slightly upward light.

  Each of these lens portions 314c is formed in a horizontally long outer shape so as to protrude from the front surface 314a, and has a substantially spherical surface shape. Each of the lens portions 314c has a part of the light from the light emitting element 12 incident on the translucent member 314 as diffused light that slightly diffuses upward in the vertical direction and on both the left and right sides in the horizontal direction. The light is emitted as light that diffuses to some extent.

  Even when the configuration of the present embodiment is adopted, the same operational effects as those of the embodiment of the first invention of the present application can be obtained.

  In particular, in the present embodiment, since the front surface 314a of the translucent member 314 is configured by a rotating curved surface having a concave curved surface portion 314aA in the center, the region that totally reflects on the front surface 314a is compared to a flat surface. growing. For this reason, the size of the central region 314a1 on which the reflection process is performed can be reduced. Therefore, it is possible to increase the range of the annular region 314b3 on which the reflection treatment is performed on the rear surface 314b of the translucent member 314, and to effectively use light.

  In the present embodiment, the lens portion 314c is formed on the front surface 314a of the translucent member 314, but the front surface 314a of the translucent member 314 is formed of a rotating curved surface having a concave curved surface portion 314aA at the center. Therefore, although the lens portion 314c is formed on the front surface 314a, the forward projection amount of the translucent member 314 can be suppressed and the thin lamp configuration can be maintained.

  Various variations as described at the end of the description of the embodiment of the first invention of the present application can be added to the configuration of the present embodiment.

  Next, a modification of the embodiment of the second invention of the present application will be described.

  FIG. 12 is a view similar to FIG. 6 showing a vehicular illumination lamp 410 according to this modification.

  As shown in the figure, the vehicular illumination lamp 410 is different in part of the configuration of the translucent member 414 from the above embodiment.

  That is, in this modification, the pair of left and right lens portions 314c as in the above embodiment is not formed on the front surface 414a of the translucent member 414, but instead, the annular surface of the rear surface 414b of the translucent member 414 is formed. A pair of left and right reflecting portions 414d is formed in the region 414b3. At that time, the pair of left and right reflecting portions 414d are located at the lower end portions of the reflecting regions located on the left and right sides of the optical axis Ax in the annular region 414b3.

  Then, a part of the light from the light emitting element 12 which is internally reflected again by the annular region 414b3 of the rear surface 414b of the translucent member 414 is reflected slightly upward in the pair of left and right reflecting portions 414d, and this is translucent. A light distribution pattern PA for OHS irradiation as shown in FIG. 4 is formed by emitting light upward from the front surface 414 a of the member 414.

  Even in the case of adopting the configuration of the present modification, it is possible to obtain the same operational effects as in the case of the above embodiment.

  In addition, as in this modification, a pair of left and right reflecting portions 414d for forming the OHS irradiation light distribution pattern PA is formed in the annular region 414b3 of the rear surface 414b of the translucent member 414. The above-described effects can be obtained without providing a projecting portion on the translucent member 414.

  In addition, the numerical value shown as a specification in each said embodiment and each modification is only an example, and of course, you may set these to a different value suitably.

10, 110, 210, 310, 410 Vehicle illumination lamp 12 Light emitting element 12a Light emitting chip 12b Substrate 14, 114, 214, 314, 414 Translucent member 14a, 114a, 214a, 314a, 414a Front surface 14a1, 314a1, 414a1 Central region 14a2, 114a2, 314a2 Peripheral region 14b, 114b, 214b, 314b, 414b Rear surface 14b1 Light incident region 14b2 Plane region 14b3, 114b3, 214b3, 314b3, 414b3 Annular region 14c Lens unit 16 Support plate 18 Heat sink 18a Heat radiation fins 22, 24 Reflection Membrane 120 Lens member 214d, 414d Reflection portion 314aA, 414aA Concave surface A Point on optical axis Ax Optical axis CL1 Horizontal cut-off line CL2 Oblique cut-off line E D Lubo point F Focus HZ Hot zone OHS Overhead label PA Light distribution pattern for OHS irradiation (second light distribution pattern)
PL Low beam light distribution pattern (first light distribution pattern)
PL1, PL2, PL3 Light distribution pattern Z1, Z2, Z3, Z4, Z5, Z6, Z7, Z8 Reflection area

Claims (6)

A light emitting element disposed toward the front of the lamp, and a translucent member disposed on the front side of the lamp with respect to the light emitting element, and the light emitted from the light emitting element is incident on the translucent member to A first light distribution pattern having a cut-off line at the upper end is formed by reflecting the inner surface on the front surface of the light transmitting member, then reflecting the inner surface again on the rear surface of the light transmitting member and emitting the light from the front surface of the light transmitting member. In the vehicular illumination lamp configured to form,
The front surface of the translucent member is configured with a flat surface, and the annular region located on the outer peripheral side of the light incident region where the light from the light emitting element is incident on the rear surface of the translucent member is configured with a plurality of curved surfaces. ,
A reflection treatment is applied to the annular region,
A part of light from the light emitting element that has been internally reflected again on the rear surface of the translucent member so as to form a second light distribution pattern on the surface of the translucent member at a position away from the cut-off line. A vehicular illumination lamp comprising a lens portion or a reflection portion that emits light as upward light toward the front. A light emitting element disposed toward the front of the lamp, and a translucent member disposed on the front side of the lamp with respect to the light emitting element, and the light emitted from the light emitting element is incident on the translucent member to A first light distribution pattern having a cut-off line at the upper end is formed by reflecting the inner surface on the front surface of the light transmitting member, then reflecting the inner surface again on the rear surface of the light transmitting member and emitting the light from the front surface of the light transmitting member. In the vehicular illumination lamp configured to form,
The front surface of the translucent member is configured by a rotating curved surface having a concave curved surface portion at the center, and an annular region located on the outer peripheral side of the light incident region on the rear surface of the translucent member on which light from the light emitting element is incident. It consists of multiple curved surfaces,
A reflection treatment is applied to the annular region,
A part of light from the light emitting element that has been internally reflected again on the rear surface of the translucent member so as to form a second light distribution pattern on the surface of the translucent member at a position away from the cut-off line. A vehicular illumination lamp comprising a lens portion or a reflection portion that emits light as upward light toward the front. The light-emitting element has a horizontally long and substantially rectangular light-emitting surface,
3. The vehicle illumination according to claim 1, wherein the lens portion or the reflection portion is provided in a cross region extending in a strip shape in the vertical and horizontal directions with the light emitting element as a center when the lamp is viewed from the front. Light fixture.   The vehicular illumination lamp according to any one of claims 1 to 3, wherein the lens portion is formed on a front surface of the translucent member.   The vehicular illumination lamp according to any one of claims 1 to 3, wherein the lens portion is attached as a separate lens member to the front surface of the translucent member.   The vehicular illumination lamp according to any one of claims 1 to 3, wherein the reflecting portion is formed in the annular region.

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