JP4833145B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp provided with a reflector made of a translucent member.

  Many vehicular lamps are configured to reflect light from a light source disposed on an optical axis extending in the front-rear direction of the lamp toward the front of the lamp by a reflector. At that time, for example, a vehicle lamp described in “Patent Document 1” is also known in which a reflector is formed of a light-transmitting member.

  In the vehicular lamp described in “Patent Document 1”, the outer surface of the reflector made of a translucent member is configured with a plurality of protrusions extending radially with respect to the optical axis. The cross-sectional shape along a plane orthogonal to the optical axis is constituted by a total reflection prism having a substantially V-shape. And this vehicle lamp uses the total reflection in the total reflection prism that constitutes each of the ridges to direct light from the light source not only on the inner surface but also on the outer surface of the reflector. It is designed to reflect.

  Further, in “Patent Document 2”, in such a vehicular lamp, the reflector is divided into a plurality of fan-shaped reflection areas for each predetermined number of protrusions, and the configuration of each protrusion is defined as a fan-shaped reflection. It is described that it is different depending on the position of the region.

JP 2005-228646 A JP 2006-338985 A

  As described in the above-mentioned “Patent Document 1” and “Patent Document 2”, if the reflector is composed of a translucent member and the outer surface thereof is composed of a plurality of total reflection prisms, the reflector is subjected to mirror surface treatment. The necessity can be eliminated, and thereby the lamp manufacturing cost can be reduced.

  At this time, if a reflector such as that described in “Patent Document 2” is employed, it is possible to perform radial deflection diffusion control with respect to the optical axis for each of the fan-shaped reflection regions. Not only the light pattern but also a horizontally long light distribution pattern that is desired to be formed in many vehicle lamps can be easily formed.

  However, the reflector described in “Patent Document 2” can perform only control for deflecting and diffusing the light from the light source in the radial direction with respect to the optical axis for each fan-shaped reflection region. There is a problem that it is not easy to form a small horizontal light distribution pattern.

  The present invention has been made in view of such circumstances, and for a vehicle lamp provided with a reflector made of a translucent member, for a vehicle capable of forming a horizontally long light distribution pattern with little light distribution unevenness. The purpose is to provide a lamp.

  In the present invention, the shape of the inner surface of the reflector made of a translucent member is devised, and the outer surface is constituted by a plurality of ridges extending substantially radially with respect to the optical axis, and the configuration of each of the ridges. The above-mentioned purpose is achieved by devising the above.

That is, the vehicular lamp according to the first invention of the present application is:
In a vehicular lamp comprising: a light source disposed on an optical axis extending in the front-rear direction of the lamp; and a reflector made of a translucent member that reflects light from the light source toward the front of the lamp.
The inner surface of the reflector reflects light from the light source in a direction substantially parallel to the optical axis in the vertical direction and in a direction approaching the optical axis in the horizontal direction. It is composed of formed curved surfaces,
The outer surface of the reflector is composed of a plurality of protrusions extending substantially radially with respect to the optical axis,
Each of these ridges is composed of a total reflection prism whose cross-sectional shape along a plane orthogonal to the optical axis is set to a substantially V shape, and each of these ridges is in front view of the lamp The straight line extending in the radial direction from the optical axis is formed to be curved and extend outward in the radial direction in a direction away from the horizontal plane including the optical axis. ,
The vehicular lamp according to the second invention of the present application is:
In a vehicular lamp comprising: a light source disposed on an optical axis extending in the front-rear direction of the lamp; and a reflector made of a translucent member that reflects light from the light source toward the front of the lamp.
The inner surface of the reflector reflects light from the light source in a direction substantially parallel to the optical axis in the vertical direction and in a direction away from the optical axis in the horizontal direction. It is composed of formed curved surfaces,
The outer surface of the reflector is composed of a plurality of protrusions extending substantially radially with respect to the optical axis,
Each of these ridges is composed of a total reflection prism whose cross-sectional shape along a plane orthogonal to the optical axis is set to a substantially V shape, and each of these ridges is in front view of the lamp The straight line extending in the radial direction from the optical axis is formed to be curved and extend outward in the radial direction in a direction away from the vertical plane including the optical axis. is there.

  The type of the “vehicle lamp” is not particularly limited. For example, a head lamp, a fog lamp, a cornering lamp, a tail lamp, a stop lamp, a backup lamp, a turn signal lamp, a daytime running lamp, and the like can be employed.

  The “lamp front-rear direction” may be the same direction as the vehicle front-rear direction, or may be a direction different from the vehicle front-rear direction.

  The type of the “light source” is not particularly limited, and for example, a light emitting chip of a light emitting element such as a light emitting portion of a discharge bulb or a halogen bulb or a light emitting diode can be employed.

  The “reflector” is not necessarily formed so as to surround the entire optical axis. The “translucent member” constituting the “reflector” is not particularly limited as long as it is a translucent member. For example, synthetic resin or glass can be employed.

  The “projection portion” means a projection portion extending linearly.

  The above-mentioned “formed so as to be curved and extend in a direction away from a horizontal plane including the optical axis toward the outer side in the radial direction with respect to a straight line extending in the radial direction from the optical axis” than the optical axis. As for the ridges located on the upper side, it means that the degree of upward increase gradually toward the radially outward direction, and for the ridges located below the optical axis, It means that it is formed so that the downward degree gradually increases outward in the radial direction.

  The above-mentioned "formed so as to be curved and extend in the direction away from the vertical plane including the optical axis toward the radial direction outward with respect to the straight line extending in the radial direction from the optical axis" It means that it is formed so that the lateral direction degree gradually increases toward the direction.

  As shown in the above configuration, the vehicular lamp according to the first invention of the present application reflects light from a light source arranged on an optical axis extending in the front-rear direction of the lamp toward the front of the lamp by a reflector made of a translucent member. However, the inner surface of the reflector reflects light from the light source in a direction substantially parallel to the optical axis in the vertical direction and in a direction approaching the optical axis in the horizontal direction. Therefore, the reflected light from the inner surface hardly diffuses in the vertical direction, but once converges in the horizontal direction and then diffuses. A horizontally long light distribution pattern can be formed.

  The outer surface of the reflector is composed of a plurality of ridges extending substantially radially with respect to the optical axis, and each of the ridges has a cross-sectional shape along a plane perpendicular to the optical axis, approximately V. Since it is comprised by the total reflection prism set to the character shape, the light from the light source which injected into the reflector from the inner surface of a reflector can be totally reflected in each protrusion part. For this reason, it is possible to reflect the light from the light source toward the front of the lamp on the inner surface and the outer surface of the reflector without requiring mirror treatment on the reflector, thereby reducing the manufacturing cost of the vehicular lamp. Can be achieved.

  At this time, each protrusion is formed so as to be curved and extend in a direction away from the horizontal plane including the optical axis, outward in the radial direction, with respect to a straight line extending in the radial direction from the optical axis in a front view of the lamp. Therefore, the position of the light source image formed on the virtual vertical screen arranged in front of the lamp due to the reflected light from each radial part in each ridge, when the ridge is not curved With respect to the light source image forming position, the light source image formed by the reflected light from the part away from the optical axis can be largely displaced closer to the horizontal plane including the optical axis. In addition, the amount of displacement can be adjusted as appropriate depending on the degree of curvature of each protrusion. Therefore, the light distribution pattern formed by the reflected light from the outer surface of the reflector can be a horizontally long light distribution pattern, similar to the light distribution pattern formed by the reflected light from the inner surface, and This can be made with little light distribution unevenness.

  On the other hand, the vehicular lamp according to the second invention of the present application is configured to reflect light from a light source arranged on an optical axis extending in the front-rear direction of the lamp toward the front of the lamp by a reflector made of a translucent member. However, the inner surface of the reflector reflects light from the light source in a direction substantially parallel to the optical axis in the vertical direction and in a direction away from the optical axis in the horizontal direction. Since it is composed of a curved surface, the reflected light from the inner surface will hardly diffuse in the vertical direction but will diffuse in the horizontal direction, thereby forming a horizontally elongated light distribution pattern. Can do.

  The outer surface of the reflector is composed of a plurality of ridges extending substantially radially with respect to the optical axis, and each of the ridges has a cross-sectional shape along a plane perpendicular to the optical axis, approximately V. Since it is comprised by the total reflection prism set to the character shape, the light from the light source which injected into the reflector from the inner surface of a reflector can be totally reflected in each protrusion part. For this reason, it is possible to reflect the light from the light source toward the front of the lamp on the inner surface and the outer surface of the reflector without requiring mirror treatment on the reflector, thereby reducing the manufacturing cost of the vehicular lamp. Can be achieved.

  At that time, each protrusion is formed so as to be curved and extend in a direction away from a vertical plane including the optical axis outward in the radial direction with respect to a straight line extending in the radial direction from the optical axis in a front view of the lamp. Because the position of the light source image formed on the virtual vertical screen arranged in front of the lamp is not curved by the reflected light from each part in the radial direction at each ridge, With respect to the light source image forming position, the light source image formed by the reflected light from the part distant from the optical axis can be largely displaced closer to the horizontal plane including the optical axis. In addition, the amount of displacement can be adjusted as appropriate depending on the degree of curvature of each protrusion. Therefore, the light distribution pattern formed by the reflected light from the outer surface of the reflector can be a horizontally long light distribution pattern, similar to the light distribution pattern formed by the reflected light from the inner surface, and This can be made with little light distribution unevenness.

  As described above, according to the present invention, in the vehicular lamp including the reflector made of the translucent member, it is possible to form a horizontally long light distribution pattern with little light distribution unevenness.

  In the above-described configuration, the degree of curvature of each protrusion is determined by the light from the light source reflected at each point on the inner surface of the reflector and the light from the light source that is incident on each point and reflected by the outer surface of the reflector. If the value is set so that the light is emitted in substantially the same direction toward the front of the lamp, the light distribution pattern formed by the reflected light from the outer surface of the reflector is formed by the reflected light from the inner surface. The light distribution pattern can be formed in substantially the same shape, so that a desired horizontally long light distribution pattern can be efficiently formed.

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

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

  FIG. 1 is a front view showing a vehicular lamp according to the present embodiment. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG.

  As shown in these drawings, the vehicular lamp 10 according to the present embodiment is configured as a headlamp unit that performs light irradiation for forming a high beam light distribution pattern, and is incorporated in a lamp body or the like (not shown). It is designed to be used with

  The vehicular lamp 10 includes a light source bulb 12 disposed on an optical axis Ax extending in the longitudinal direction of the lamp, and a reflector 14 that reflects light from the light source bulb 12 toward the front of the lamp. The shaft Ax is used in a state where it is arranged so as to extend in the vehicle front-rear direction.

  The light source bulb 12 is a halogen bulb having a filament as a light source 12a, and the light source 12a is configured as a line light source extending along the central axis of the bulb. The light source bulb 12 is inserted into the rear top opening 14c of the reflector 14 so that the light source 12a is arranged along the optical axis Ax.

  The reflector 14 is composed of a transparent resin-made translucent member, and has a substantially vertically elliptical outer shape when viewed from the front of the lamp. In that case, as a transparent resin which comprises this translucent member, a colorless and transparent acrylic resin, polycarbonate resin, etc. are employable, for example.

  The reflector 14 is configured to reflect light from the light source 12a on both the inner surface 14a and the outer surface 14b. At this time, the inner surface 14a of the reflector 14 is formed by a single curved surface, but the outer surface 14b has a plurality of ridges 20 (specifically, 40 ridges) extending substantially radially with respect to the optical axis Ax. It is comprised by the protrusion part 20).

  The inner surface 14a of the reflector 14 reflects light from the light source 12a in a direction substantially parallel to the optical axis Ax in the vertical direction and in a direction approaching the optical axis Ax in the horizontal direction. It is comprised by the curved surface formed.

  Specifically, the inner surface 14a has a vertical cross-sectional shape set to a parabolic shape with the optical axis Ax as an axis and a central position of the light source 12a as a focal point, and its horizontal cross-sectional shape has an optical axis Ax as a center. It has a surface shape obtained by slightly deforming an elliptical paraboloid set as an elliptical shape having a long axis and a center position of the light source 12a as a first focal point.

  That is, as shown in FIG. 3, the inner surface 14a is formed such that the left half and the right half thereof are symmetrical with respect to the optical axis Ax, whereby the light from the light source 12a is transferred to the optical axis Ax. Reflected symmetrically toward the approaching direction.

  On the other hand, as shown in FIG. 2, the upper half portion of the inner surface 14a (that is, the portion located above the optical axis Ax) transmits the light from the light source 12a to the optical axis in the region near the upper edge. While reflecting in the direction parallel to Ax, in the region near the optical axis Ax, the light from the light source 12a is reflected slightly upward in the direction parallel to the optical axis Ax. Further, the lower half of the inner surface 14a (that is, the portion located below the optical axis Ax) directs the light from the light source 12a in a direction parallel to the optical axis Ax in a region near the lower edge. On the other hand, in the region near the optical axis Ax, the light from the light source 12a is reflected slightly upward with respect to the direction parallel to the optical axis Ax.

  Each protrusion 20 constituting the outer surface 14b of the reflector 14 has a substantially V-shaped cross section (hereinafter, also simply referred to as “optical axis orthogonal cross section”) along a plane orthogonal to the optical axis Ax. It consists of a total reflection prism.

  At this time, the protrusions 20 are arranged at equal intervals in the circumferential direction with respect to the optical axis Ax at the inner peripheral edge. Each of the protrusions 20 is curved and extends in a direction away from the horizontal plane including the optical axis Ax outward in the radial direction with respect to the straight line L extending in the radial direction from the optical axis Ax in the front view of the lamp. It is formed as follows. In addition, the point where each protrusion 20 is formed to be curved and extended will be described in detail later.

  4 is a detailed sectional view taken along line IV-IV in FIG. FIG. 5 is a perspective view showing a part of the ridge portion 20 positioned substantially right above the optical axis Ax and shown together with the light source 12a.

  As shown in these drawings, each of the protrusions 20 constituting the outer surface 14b of the reflector 14 has a pair of inclined surfaces each formed by a convex curved surface. At this time, the cross-sectional shape orthogonal to the optical axis of the pair of inclined surfaces constituting each of the protrusions 20 is set to a substantially arc-shaped convex curve shape, and the prism apex angle is a surface with respect to the inner surface 14a. It is set to about 90 ° in the straight section. Thus, the light that has reached the inner surface 14a of the reflector 14 from the light source 12a and entered the reflector 14 is totally reflected by each protrusion 20, and this is reflected from the light source 12a to the inner surface 14a in the front view of the lamp. The light is emitted in the same direction as the light incident direction.

  It is as follows when the effect | action of total reflection in this each protrusion part 20 is explained in full detail.

  That is, as described above, the inner surface 14a of the reflector 14 has a surface shape obtained by slightly deforming the elliptical paraboloid, but the inner surface 14a is located at a position almost directly above the optical axis Ax. As shown in FIG. 4, the optical axis orthogonal cross-sectional shape is a substantially arc shape centering on the optical axis Ax. Therefore, after the light from the light source 12a is incident at a substantially right angle with respect to the inner surface 14a in a plane orthogonal to the optical axis Ax, and is totally reflected twice by a pair of inclined surfaces constituting each protrusion portion 20. The light is emitted from the inner surface 14a.

  At that time, as shown by a two-dot chain line in the figure, if each protrusion 20 is formed of a right-angle prism, the light incident on the reflector 14 from the light source 12a is reflected on each protrusion. After being totally reflected twice by a pair of slopes constituting 20, the light returns in the same direction as before reflection. When the light reaches the inner surface 14a, the arrival position is away from the incident position, so that the light is not perpendicular to the inner surface 14a, but is refracted when it is emitted from the inner surface 14a. Therefore, the direction of the emitted light from the reflector 14 is different from the direction of light incident on the reflector 14.

  On the other hand, in this embodiment, since the optical axis orthogonal cross-sectional shape of the pair of inclined surfaces constituting each protrusion 20 is set to a convex curved surface shape, the light incident on the reflector 14 from the light source 12a is After being totally reflected twice by a pair of inclined surfaces constituting each protrusion 20, the light returns not in the same direction as before the reflection but in a direction slightly closer to the incident position. When this light also reaches the inner surface 14a, it does not become perpendicular to the inner surface 14a, but is refracted when it exits from the inner surface 14a, but this refraction causes its exit direction to enter the reflector 14. The direction can be the same as the direction.

  As shown in FIGS. 2, 3 and 5, each protrusion 20 gradually increases in thickness from the inner peripheral edge to the outer peripheral edge of the reflector 14, and the curvature of the pair of slopes gradually changes. It is formed to do.

  This will be described in detail as follows.

  That is, in order to explain the action of total reflection in each ridge 20, in FIG. 4, it is assumed that the process from incident to emission is performed in a plane orthogonal to the optical axis Ax. As shown, the light from the light source 12a does not actually enter at a right angle with respect to each position of the reflector 14 in the plane including the optical axis Ax, and from the incident position on the reflector 14. Is also emitted from the reflector 14 at a position away from the optical axis Ax.

  Therefore, the thickness of each protrusion 20 is gradually increased from the inner peripheral edge to the outer peripheral edge of the reflector 14, and the curvature of the pair of slopes is gradually changed, so that the light emitted from the reflector 14 is changed. In a plane parallel to the optical axis Ax, the light travels in the same direction as the reflected light from the inner surface 14a.

  Further, in the present embodiment, the inner surface 14a of the reflector 14 is not a rotating paraboloid having the optical axis Ax as a central axis, but a curved surface obtained by slightly deforming an elliptic paraboloid having the optical axis Ax as a central axis. Therefore, the light from the light source 12a does not enter at a right angle with respect to each position of the reflector 14 even in a plane orthogonal to the optical axis Ax.

  For this reason, if each protrusion 20 is formed along a straight line L extending in the radial direction from the optical axis Ax in the lamp front view, the protrusion 20 is totally reflected and emitted from the inner surface 14a. The emission direction of light (hereinafter referred to as “total reflection light”) is within a plane orthogonal to the optical axis Ax with respect to the emission direction of light directly reflected by the inner surface 14a (hereinafter referred to as “direct reflection light”). However, the surface shape of the inner surface 14a of the reflector 14 is substantially parabolic, and the horizontal sectional shape of the inner surface 14a of the reflector 14. Is set in a substantially elliptical shape, the emission direction of the totally reflected light is displaced downward in the upper half of the reflector 14 with respect to the emission direction of the directly reflected light, and in the lower half of the reflector 14. Is displaced upward The Rukoto.

  Therefore, in the present embodiment, each protrusion 20 is in a direction away from a horizontal plane including the optical axis Ax radially outward with respect to a straight line L extending in the radial direction from the optical axis Ax in the lamp front view. By being formed so as to be curved and extend, the total reflected light is made to go in the same direction as the directly reflected light even in a plane orthogonal to the optical axis Ax.

  At that time, each ridge portion 20 has its ridge line 20a slightly displaced from the center position of a pair of valley lines on both sides of the ridge portion 20 to the side away from the horizontal plane including the optical axis Ax. Is formed. As a result, the function as a total reflection prism is maintained despite the fact that each protrusion 20 extends in a curved manner.

  FIG. 6A is a perspective view of a high beam light distribution pattern formed on a virtual vertical screen disposed at a position 25 m ahead of the lamp by light irradiated forward from the vehicle lamp 10 according to the present embodiment. FIG.

  This high-beam light distribution pattern PH is formed as a horizontally long light distribution pattern that extends in the left-right direction around the vanishing point HV in the front direction of the lamp, and a hot zone that is a high luminous intensity region at the center. HZ is formed.

  At this time, the high-beam light distribution pattern PH has a shape in which the lower end edge thereof is nearly horizontal in order to place importance on far visibility, and an isoluminous curve (multiple lines) from the lower end edge toward the hot zone HZ. (Closed curve) is densely arranged.

  FIG. 6B is a view showing a part of the infinite number of light source images I constituting the high beam light distribution pattern PH, and shows the light source image I formed by the reflected light from the main points of the reflector 14. It is a thing.

  FIG. 7 shows the relationship between each of the light source images I shown in FIG. 6B and the main point of the reflector 14 where the light from the light source 12a that forms each of the light source images I is reflected from the rear side of the reflector 14. FIG. However, in FIG. 7, only the light source image formed by the reflected light from the right half of the reflector 14 is shown.

  The four light source images Ia1, Ia2, Ia3, and Ia4 shown in FIG. 7A are light sources formed by reflected light from the region Za of the reflector 14 and four points P1, P2, P3, and P4 located in the vicinity thereof. It is a statue.

  In that case, the area | region Za is an area | region in which the protrusion part 20 formed in the position shifted | deviated to the right side from right above the optical axis Ax is located.

  Further, the point P1 is a point located in the vicinity of the rear top opening 14c of the reflector 14, and is slightly deviated from the region Za toward the optical axis Ax side. The point P2 is a point located near the inner periphery in the region Za, the point P3 is a point located substantially in the center in the radial direction in the region Za, and the point P4 is a point located near the outer periphery in the region Za. It is.

  As described above, the reflector 14 is configured to emit the directly reflected light and the totally reflected light in the same direction. Therefore, the light source image Ia1 is formed by the directly reflected light from the point P1, and the remaining three The light source images Ia2, Ia3, and Ia4 are formed by directly reflected light and total reflected light from the points P2, P3, and P4, respectively.

  Since the light source image Ia1 is formed by the reflected light from the point P1 relatively close to the optical axis Ax, the light source image Ia2, Ia3, and Ia4 are in the order of the points P2, P3, and P4. Since the point P1 is farther from the optical axis Ax, the light source images Ia2, Ia3, and Ia4 are gradually smaller in order.

  At this time, the light source image Ia1 is an image that extends slightly inclined to the right side with respect to the vertical direction because the point P1 is slightly displaced rightward from right above the optical axis Ax. In addition, since the light source images Ia2, Ia3, and Ia4 are curved and extend upward, the light source images Ia2, Ia3, and Ia4 are images that extend in the order closer to the vertical direction than the light source image Ia1. ing.

  Further, since the inner surface 14a of the reflector 14 is set to have an elliptical horizontal cross-sectional shape, the light source images Ia1, Ia2, Ia3, and Ia4 are VV that are vertical lines passing through HV in this order. It is formed by gradually displacing from the line to the left. Further, the inner surface 14a of the reflector 14 is set to have a substantially parabolic shape in the vertical cross section, and the upper half portion of the inner surface 14a transmits light from the light source 12a in a region near the upper edge. While reflecting in the direction parallel to the optical axis Ax, the light from the light source 12a is reflected slightly upward in the direction near the optical axis Ax in the region near the optical axis Ax. Therefore, the center positions of the light source images Ia1, Ia2, Ia3, and Ia4 are gradually displaced upward in the reverse order. As a result, the light source images Ia1, Ia2, Ia3, and Ia4 are formed in a state where the positions of the lower end edges thereof are substantially aligned.

  In FIG. 7A, the three light source images Ia2 ′, Ia3 ′, and Ia4 ′ indicated by broken lines are assumed to extend radially with respect to the optical axis Ax. And the three points P2, P3, P4 are formed by the total reflected light when they are on the ridges extending radially through the points P2, P3, P4. It is a statue. Actually, since the ridge portion 20 is curved and extends upward, the light source image formed by the total reflection light is formed by the direct reflection light from the positions of the light source images Ia2 ′, Ia3 ′, and Ia4 ′. The light source images Ia2, Ia3, and Ia4 are displaced and formed.

  The four light source images Ib1, Ib2, Ib3, and Ib4 shown in FIG. 7B include four points P1 and P2 in the region Zb of the reflector 14 and four points positioned in the vicinity thereof (region Za in FIG. 7A). , P3, and P4).

  The region Zb is located at an angle of about 45 ° from the optical axis Ax on the right side of the region Za in FIG. Therefore, the four light source images Ib1, Ib2, Ib3, and Ib4 are inclined to the right side with respect to the light source images Ia1, Ia2, Ia3, and Ia4 in FIG. The amount of displacement is increased. Further, these four light source images Ib1, Ib2, Ib3, and Ib4 are gradually smaller in this order, and the positions of the lower end edges thereof are substantially aligned. This point is illustrated in FIG. ).

  Further, in FIG. 7B, three light source images Ib2 ′, Ib3 ′, and Ib4 ′ indicated by broken lines are images corresponding to the light source images Ia2 ′, Ia3 ′, and Ia4 ′ of FIG. It is a light source image formed by the total reflected light from the protrusion part 20 which comprises the area | region Zb. Since the protrusions 20 constituting the region Zb are also curved upward and extend, the light source images formed by the total reflected light are the light source images Ib2 ′ and Ib3 ′ as in the case of FIG. , Ib4 ′ is displaced from the position of the light source image Ib2, Ib3, Ib4 formed by the directly reflected light.

  The four light source images Ic1, Ic2, Ic3, and Ic4 shown in FIG. 7C include four points P1 and P2 in the region Zc of the reflector 14 and four points located in the vicinity thereof (region Za in FIG. 7A). , P3, and P4).

  The region Zc is located at an angle closer to the horizontal plane including the optical axis Ax on the right side of the region Zb in FIG. For this reason, the four light source images Ic1, Ic2, Ic3, and Ic4 are further inclined to the right side with respect to the light source images Ib1, Ib2, Ib3, and Ib4 in FIG. 7B, and left from the VV line. The amount of displacement in the direction is further increased. Further, these four light source images Ib1, Ib2, Ib3, and Ib4 are gradually smaller in this order, and the positions of the lower end edges thereof are substantially aligned. This point is illustrated in FIG. ) And (b).

  Further, in FIG. 7C, three light source images Ic2 ′, Ic3 ′, and Ic4 ′ indicated by broken lines are images corresponding to the light source images Ia2 ′, Ia3 ′, and Ia4 ′ of FIG. It is a light source image formed by the total reflection light from the protrusion part 20 which comprises the area | region Zc. Since the protrusions 20 constituting the region Zc are also curved upward and extend, the light source images formed by the total reflected light are the light source images Ic2 ′ and Ic3 ′ as in the case of FIG. , Ic4 ′ is displaced from the position of light source images Ic2, Ic3, Ic4 formed by directly reflected light.

  The four light source images Id1, Id2, Id3, and Id4 shown in FIG. 7D include four points P1 and P2 in the region Zd of the reflector 14 and four points located in the vicinity thereof (region Za in FIG. 7A). , P3, and P4).

  The region Zd is at a position obtained by vertically inverting the region Za in FIG. 7A with respect to the horizontal plane including the optical axis Ax. Therefore, the four light source images Id1, Id2, Id3, and Id4 have shapes obtained by vertically inverting the light source images Ia1, Ia2, Ia3, and Ia4 in FIG. Further, the three light source images Id2 ′, Id3 ′, and Id4 ′ also have a shape obtained by vertically inverting the light source images Ia2 ′, Ia3 ′, and Ia4 ′ of FIG.

  However, the vertical surface shape of the inner surface 14a of the reflector 14 is set to a substantially parabolic shape, and the lower half of the inner surface 14a transmits light from the light source 12a in a region near its lower edge. While reflecting in the direction parallel to the optical axis Ax, the light from the light source 12a is reflected slightly upward in the direction near the optical axis Ax in the region near the optical axis Ax. Therefore, the center positions of the light source images Id1, Id2, Id3, and Id4 are gradually displaced upward in the reverse order. As a result, each of the light source images Id1, Id2, Id3, and Id4 is formed in a state where the positions of the lower end edges thereof are substantially aligned.

  The four light source images Ie1, Ie2, Ie3, and Ie4 shown in FIG. 7 (e) include four points P1 and P2 in the region Ze of the reflector 14 and four points located in the vicinity thereof (region Za in FIG. 7 (a)). , P3, and P4).

  The region Ze is at a position obtained by vertically inverting the region Zb of FIG. 7B with respect to the horizontal plane including the optical axis Ax. For this reason, the four light source images Ie1, Ie2, Ie3, and Ie4 have shapes obtained by vertically inverting the light source images Ib1, Ib2, Ib3, and Ib4 in FIG. Also, the three light source images Ie2 ′, Ie3 ′, and Ie4 ′ have shapes that are obtained by vertically inverting the light source images Ib2 ′, Ib3 ′, and Ib4 ′ of FIG.

  However, the center positions of these light source images Ie1, Ie2, Ie3, and Ie4 are gradually displaced upward in the reverse order, and the positions of the lower end edges thereof are substantially aligned. ).

  The four light source images If1, If2, If3, If4 shown in FIG. 7 (f) have four points P1 and P2 in the region Zf of the reflector 14 and four points located in the vicinity thereof (region Za in FIG. 7 (a)). , P3, and P4).

  The region Zf is at a position obtained by vertically inverting the region Zc of FIG. 7C with respect to the horizontal plane including the optical axis Ax. For this reason, the four light source images If1, If2, If3, and If4 have shapes obtained by vertically inverting the light source images Ic1, Ic2, Ic3, and Ic4 of FIG. Further, the three light source images If2 ′, If3 ′, If4 ′ also have a shape obtained by vertically inverting the light source images Ic2 ′, Ic3 ′, Ic4 ′ of FIG.

  However, the center positions of these light source images If1, If2, If3, If4 are gradually displaced upward in the reverse order, and the positions of the lower edge thereof are substantially aligned as shown in FIG. ) And (e).

  FIG. 7 shows a light source image formed by the reflected light from the right half of the reflector 14, but the reflector 14 has a symmetrical shape with respect to the optical axis Ax. The light source image formed by the reflected light is an image obtained by horizontally inverting the light source image shown in FIG. 7 with respect to the VV line.

  As described in detail above, the vehicular lamp 10 according to this embodiment directs light from the light source 12a disposed on the optical axis Ax extending in the front-rear direction of the lamp to the front of the lamp by the reflector 14 made of a translucent member. The inner surface 14a of the reflector 14 reflects light from the light source 12a in a direction substantially parallel to the optical axis Ax in the vertical direction and in the horizontal direction. Since it is composed of a curved surface formed so as to be reflected toward the direction approaching the optical axis Ax, the reflected light from the inner surface 14a hardly converges in the vertical direction but converges once in the horizontal direction. Then, the light is diffused, whereby a horizontally long high beam light distribution pattern PH can be formed.

  The outer surface 14b of the reflector 14 is composed of a plurality of ridges 20 extending substantially radially with respect to the optical axis Ax, and each of the ridges 20 is along a plane orthogonal to the optical axis Ax. Since the cross-sectional shape is constituted by a total reflection prism having a substantially V-shape, light from the light source incident on the reflector 14 from the inner surface 14a of the reflector 14 is totally reflected by each protrusion 20. be able to. For this reason, the light from the light source can be reflected toward the front of the lamp on the inner surface 14a and the outer surface 14b of the reflector 14 without requiring the reflector 14 to be mirror-finished. 10 manufacturing costs can be reduced.

  At that time, each protrusion 20 extends in a direction away from the horizontal plane including the optical axis Ax toward the outer side in the radial direction with respect to the straight line L extending in the radial direction from the optical axis Ax in the front view of the lamp. The light source images Ia2, Ia3, Ia4, Ib2, Ib3, which are formed on the virtual vertical screen arranged in front of the lamp by the reflected light from each radial part of each protrusion 20 Ib4, Ic2, Ic3, Ic4, Id2, Id3, Id4, Ie2, Ie3, Ie4, If2, If3, If4 are light source images Ia2 ′, Ia3 ′, Ia4 when the protrusions 20 are not curved. ', Ib2', Ib3 ', Ib4', Ic2 ', Ic3', Ic4 ', Id2', Id3 ', Id4', Ie2 ', Ie3', Ie4 ', If2', If3 ', If4' Against , As a light source image formed by reflected light from sites distant from the optical axis Ax, it can be greatly displaced in the horizontal plane toward including the optical axis Ax. In addition, the amount of displacement can be adjusted as appropriate depending on the degree of curvature of each protrusion 20. Therefore, the light distribution pattern formed by the reflected light from the outer surface 14b of the reflector 14 can also be a horizontally long light distribution pattern, similar to the light distribution pattern formed by the reflected light from the inner surface 14a. And this can be made into a thing with little light distribution nonuniformity.

  As described above, according to the present embodiment, in the vehicular lamp 10 including the reflector 14 made of a translucent member, a horizontally long high beam light distribution pattern PH with little light distribution unevenness can be formed.

  In addition, in this embodiment, the degree of curvature of each protrusion 20 is determined by the light from the light source 12a reflected at each point on the inner surface 14a of the reflector 14 and the outer surface 14b of the reflector 14 incident on these points. Since the reflected light from the light source 12a is set to a value that emits light in substantially the same direction toward the front of the lamp, the light distribution pattern formed by the reflected light from the outer surface 14b of the reflector 14 is Thus, the light distribution pattern formed by the reflected light from the inner surface 14a can be formed in substantially the same shape, so that the target horizontally long high beam light distribution pattern PH can be efficiently formed.

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

  FIG. 8 is a front view showing the vehicular lamp according to the present embodiment. 9 is a cross-sectional view taken along the line IX-IX in FIG.

  As shown in these drawings, the vehicular lamp 110 according to the present embodiment has the same basic configuration as the vehicular lamp 10 according to the first embodiment, but the reflector 114 has the configuration described above. This is different from the case of the first embodiment.

  That is, the reflector 114 of the present embodiment is made of a transparent resin-made transparent member, similar to the reflector 14 of the first embodiment, but has a substantially oblong outer shape when viewed from the front of the lamp. Yes.

  Similar to the reflector 14 of the first embodiment, the reflector 114 is configured to reflect the light from the light source 12a on both the inner surface 114a and the outer surface 114b. At this time, the inner surface 114a of the reflector 114 is configured by a single curved surface, but the outer surface 114b has a plurality of protrusions 120 (specifically, 40 ridges 120 extending substantially radially with respect to the optical axis Ax). It is comprised by the protrusion 120).

  The inner surface 114a of the reflector 114 reflects light from the light source 12a in a direction substantially parallel to the optical axis Ax in the vertical direction and in a direction away from the optical axis Ax in the horizontal direction. It is comprised by the curved surface formed.

  Specifically, the inner surface 114a has a vertical cross-sectional shape that is set to a parabolic shape with the optical axis Ax as an axis and a central position of the light source 12a, and a horizontal cross-sectional shape that has an optical axis Ax as the center. It has a surface shape obtained by slightly deforming a curved surface set in a hyperbola shape having an axis as a focal point and a central position of the light source 12a.

  That is, as shown in FIG. 9, the inner surface 114a is formed such that the left half and the right half thereof are symmetrical with respect to the optical axis Ax, and thereby, the light from the light source 12a is transmitted from the optical axis Ax. Reflected symmetrically toward the direction of leaving. On the other hand, the vertical cross-sectional shape of the inner surface 114a is the same as that of the reflector 14 of the first embodiment.

  Each ridge 120 constituting the outer surface 114b of the reflector 114 is composed of a total reflection prism similar to each ridge 20 of the first embodiment.

  At this time, the protrusions 120 are arranged at equal intervals in the circumferential direction with respect to the optical axis Ax at the inner peripheral edge thereof. Each of the protrusions 20 is curved in a direction away from a vertical plane including the optical axis Ax outward in the radial direction with respect to a straight line L extending in the radial direction from the optical axis Ax in the front view of the lamp. It is formed to extend. As a result, even in a plane orthogonal to the optical axis Ax, the totally reflected light is directed to the same direction as the directly reflected light.

  That is, as for the surface shape of the inner surface 114a in the reflector 114 of this embodiment, the vertical cross-sectional shape is set to a substantially parabolic shape, and the horizontal cross-sectional shape is set to a substantially hyperbolic shape. In the front view of the lamp, if it is formed along a straight line extending in the radial direction from the optical axis Ax, the emission direction of light (that is, total reflection light) that is totally reflected by each protrusion 120 and emitted from the inner surface 114a is The upper half of the reflector 14 is displaced upward and the lower half of the reflector 114 is displaced downward with respect to the emission direction of light directly reflected by the inner surface 114a (ie, directly reflected light). It will be. However, in the present embodiment, since each ridge 120 is curved as described above, the total reflected light can be made to go in the same direction as the directly reflected light.

  In addition, the ridges 120a of these ridges 120 are slightly displaced from the central positions of a pair of valleys on both sides of the ridge 120 to the side closer to the horizontal plane including the optical axis Ax. Is formed. As a result, the function as the total reflection prism is maintained even though each protrusion 120 extends in a curved manner.

  A high beam light distribution pattern similar to the high beam light distribution pattern PH shown in FIG. 6A is also formed by light emitted forward from the vehicular lamp 110 according to the present embodiment.

  FIG. 10 shows the relationship between each of the light source images constituting the high-beam light distribution pattern and the main points of the reflector 114 where the light from the light source 12a forming each of the light source images is reflected from the rear side of the reflector 114. FIG. However, in FIG. 10, only the light source image formed by the reflected light from the right half of the reflector 114 is shown.

  A region Zg shown in FIG. 10 (g) is a region at a position substantially corresponding to the region Za shown in FIG. 7 (a), and the four light source images Ig1, Ig2, Ig3, and Ig4 shown in FIG. It is a light source image corresponding to four light source images Ia1, Ia2, Ia3, and Ia4 shown in FIG.

  Each of these light source images Ig1, Ig2, Ig3, and Ig4 is an image extending slightly inclined to the right with respect to the vertical direction, similar to the light source images Ia1, Ia2, Ia3, and Ia4 shown in FIG. The formation position in the vertical direction is substantially the same as that of each light source image Ia1, Ia2, Ia3, Ia4 shown in FIG. 7A, but the formation position in the horizontal direction is shown in FIG. The light source images Ia1, Ia2, Ia3, and Ia4 shown in a) are formed on the opposite side. This is because in the present embodiment, the horizontal cross-sectional shape of the inner surface 114a of the reflector 114 is set to a substantially hyperbolic shape.

  In FIG. 10G, three light source images Ig2 ′, Ig3 ′, and Ig4 ′ indicated by broken lines are images corresponding to the light source images Ia2 ′, Ia3 ′, and Ia4 ′ of FIG. It is a light source image formed by the total reflected light from the protrusion part 120 which comprises the area | region Zg. Since the ridges 120 constituting the region Zg are curved and extend in the horizontal direction, the light source images formed by the total reflected light are the light source images Ig2 ′ and Ig3 ′ as in the case of FIG. , Ig4 ′ is displaced from the position of light source images Ig2, Ig3, Ig4 formed by directly reflected light. However, the direction of displacement at that time is opposite to that in the case of FIG. This is also due to the fact that the horizontal cross-sectional shape of the inner surface 114a of the reflector 114 is set to a substantially hyperbolic shape in the present embodiment.

  A region Zh shown in FIG. 10H is a region at a position substantially corresponding to the region Zb shown in FIG. 7B, and the four light source images Ih1, Ih2, Ih3, and Ih4 shown in FIG. It is a light source image corresponding to four light source images Ib1, Ib2, Ib3, and Ib4 shown in FIG.

  The relationship between each of these light source images Ih1, Ih2, Ih3, and Ih4 and each of the light source images Ib1, Ib2, Ib3, and Ib4 shown in FIG. 7B is the same as that of each of the light source images Ig1, Ig2, and Ig3 shown in FIG. , Ig4 and the relationship between the light source images Ia1, Ia2, Ia3, and Ia4 shown in FIG.

  In FIG. 10H, three light source images Ih2 ′, Ih3 ′, and Ih4 ′ indicated by broken lines are images corresponding to the light source images Ib2 ′, Ib3 ′, and Ib4 ′ of FIG. Similarly to the case of FIG. 10G, the light source images Ih2 ′, Ih3 ′, and Ih4 ′ are formed by being displaced from the positions of the light source images Ih2, Ih3, and Ih4 formed by the directly reflected light. The direction of displacement is opposite to that in the case of FIG.

  A region Zi shown in FIG. 10 (i) is a region substantially corresponding to the region Zc shown in FIG. 7 (c), and the four light source images Ii1, Ii2, Ii3, and Ii4 shown in FIG. It is a light source image corresponding to the four light source images Ic1, Ic2, Ic3, and Ic4 shown in FIG.

  The relationship between each of these light source images Ii1, Ii2, Ii3, and Ii4 and each of the light source images Ic1, Ic2, Ic3, and Ic4 shown in FIG. 7C is the light source image Ig1, Ig2, and Ig3 shown in FIG. , Ig4 and the relationship between the light source images Ia1, Ia2, Ia3, and Ia4 shown in FIG.

  Further, in FIG. 10 (i), three light source images Ii2 ′, Ii3 ′, and Ii4 ′ indicated by broken lines are images corresponding to the light source images Ic2 ′, Ic3 ′, and Ic4 ′ of FIG. Similarly to the case of FIG. 10G, the light source images Ii2 ′, Ii3 ′, and Ii4 ′ are formed by being displaced from the positions of the light source images Ii2, Ii3, and Ii4 formed by the directly reflected light. The direction of displacement is opposite to that in the case of FIG.

  A region Zj shown in FIG. 10 (j) is a region at a position substantially corresponding to the region Zd shown in FIG. 7 (d), and the four light source images Ij1, Ij2, Ij3, Ij4 shown in FIG. It is a light source image corresponding to the four light source images Id1, Id2, Id3, and Id4 shown in FIG.

  The relationship between each of these light source images Ij1, Ij2, Ij3, Ij4 and each of the light source images Id1, Id2, Id3, Id4 shown in FIG. 7 (d) is the light source image Ig1, Ig2, Ig3 shown in FIG. 10 (g). , Ig4 and the relationship between the light source images Ia1, Ia2, Ia3, and Ia4 shown in FIG.

  In FIG. 10J, three light source images Ij2 ′, Ij3 ′, and Ij4 ′ indicated by broken lines are images corresponding to the light source images Id2 ′, Id3 ′, and Id4 ′ of FIG. Similarly to the case of FIG. 10G, the light source images Ij2 ′, Ij3 ′, Ij4 ′ are formed by being displaced from the positions of the light source images Ij2, Ij3, Ij4 formed by the directly reflected light. The direction of displacement is opposite to that in the case of FIG.

  A region Zk shown in FIG. 10 (k) is a region at a position substantially corresponding to the region Ze shown in FIG. 7 (e), and the four light source images Ik1, Ik2, Ik3, and Ik4 shown in FIG. It is a light source image corresponding to the four light source images Ie1, Ie2, Ie3, and Ie4 shown in FIG.

  The relationship between each of these light source images Ik1, Ik2, Ik3, and Ik4 and each of the light source images Ie1, Ie2, Ie3, and Ie4 shown in FIG. 7 (e) is the light source image Ig1, Ig2, and Ig3 shown in FIG. 10 (g). , Ig4 and the relationship between the light source images Ia1, Ia2, Ia3, and Ia4 shown in FIG.

  Further, in FIG. 10 (k), three light source images Ik2 ′, Ik3 ′, and Ik4 ′ indicated by broken lines are images corresponding to the light source images Ie2 ′, Ie3 ′, and Ie4 ′ of FIG. Similarly to the case of FIG. 10G, the light source images Ik2 ′, Ik3 ′, and Ik4 ′ are formed by being displaced from the positions of the light source images Ik2, Ik3, and Ik4 formed by the directly reflected light. The direction of displacement is opposite to that in the case of FIG.

  A region Zm shown in FIG. 10 (m) is a region at a position substantially corresponding to the region Zf shown in FIG. 7 (f), and the four light source images Im1, Im2, Im3, Im4 shown in FIG. It is a light source image corresponding to the four light source images If1, If2, If3, and If4 shown in FIG.

  The relationship between each of these light source images Im1, Im2, Im3, Im4 and each of the light source images If1, If2, If3, If4 shown in FIG. 7 (f) is the same as that of the light source images Ig1, Ig2, Ig3 shown in FIG. 10 (g). , Ig4 and the relationship between the light source images Ia1, Ia2, Ia3, and Ia4 shown in FIG.

  In FIG. 10 (m), three light source images Im2 ′, Im3 ′, and Im4 ′ indicated by broken lines are images corresponding to the light source images If2 ′, If3 ′, and If4 ′ of FIG. Similarly to the case of FIG. 10G, the light source images Im2 ′, Im3 ′, and Im4 ′ are formed by being displaced from the positions of the light source images Im2, Im3, and Im4 formed by the directly reflected light. The direction of displacement is opposite to that in the case of FIG.

  FIG. 10 shows a light source image formed by the reflected light from the right half of the reflector 114, but the reflector 114 has a symmetrical shape with respect to the optical axis Ax. The light source image formed by the reflected light is an image obtained by horizontally inverting the light source image shown in FIG. 10 with respect to the VV line.

  As described above in detail, also in the vehicular lamp 110 according to the present embodiment, a horizontally long high-beam light distribution pattern with little light distribution unevenness can be formed as in the vehicular lamp 10 according to the first embodiment. it can.

  In each of the above embodiments, the outer surfaces 14b and 114b of the reflectors 14 and 114 are described as being configured by 40 protrusions 20 and 120 having the same shape, but other numbers of protrusions are used. It is also possible to configure the strips, or it is also possible to configure the plurality of projections in different shapes.

  In each of the above embodiments, the protrusions 20 and 120 are arranged so that the incident positions of the totally reflected light on the inner surfaces 14a and 114a of the reflectors 14 and 114 coincide with the reflected positions of the directly reflected light. Although the description has been made on the assumption that the emission direction of the reflected light coincides with the reflection direction of the directly reflected light, instead of doing so, the emission of the total reflected light on the inner surfaces 14a and 114a of the reflectors 14 and 114 is performed. It is also possible that the position is made to coincide with the reflection position of the directly reflected light and the emission direction of the totally reflected light is made to coincide with the reflection direction of the directly reflected light.

  Even in this case, the light distribution pattern formed by the reflected light from the outer surfaces 14b and 114b of the reflectors 14 and 114 is substantially the same as the light distribution pattern formed by the reflected light from the inner surfaces 14a and 114a. The shape can be made the same, and thereby the horizontally long high beam light distribution pattern PH can be efficiently formed.

  Furthermore, in the vehicular lamps 10 and 110 according to each of the above embodiments, the light irradiation pattern forms a high beam light distribution pattern PH having a shape whose bottom edge is nearly horizontal. By appropriately changing the surface shape of the inner surfaces 14a and 114a of the 114, and appropriately changing the degree of curvature of the ridges 20 and 120 constituting the outer surfaces 14b and 114b of the reflectors 14 and 114, It is possible to form a horizontally long light distribution pattern having a shape other than the above.

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

The front view which shows the vehicle lamp which concerns on 1st Embodiment of this invention. II-II sectional view of Fig. 1 Sectional view along line III-III in Fig. 1 Detailed cross-sectional view taken along line IV-IV in Fig. 2 In the vehicular lamp, a perspective view showing a part of the protruding portion located substantially directly above the optical axis and showing the light source together (A) is a figure which shows perspectively the light distribution pattern for high beams formed on the virtual vertical screen arrange | positioned in the position of the lamp front 25m by the light irradiated ahead from the said vehicle lamp, (b) is. The figure which shows a part of countless light source image which comprises this light distribution pattern for high beams The figure which shows the relationship between each of the light source images shown in FIG.6 (b), and the main point of the reflector which the light from the light source which forms each these light source images reflects, seeing from the back side of a reflector. Front view showing a vehicular lamp according to a second embodiment of the present invention. IX-IX line cross section of FIG. The same figure as FIG. 7 which shows the effect | action of the said 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,110 Vehicle lamp 12 Light source bulb 12a Light source 14, 114 Reflector 14a, 114a Inner surface 14b, 114b Outer surface 14c Rear apex opening part 20, 120 Projection part 20a, 120a Ridge line Ax Optical axis HZ Hot zone L Straight line I, Ia1, Ia2, Ia3, Ia4, Ib1, Ib2, Ib3, Ib4, Ic1, Ic2, Ic3, Ic4, Id1, Id2, Id3, Id4, Ie1, Ie2, Ie3, Ie4, If1, If2, If3, If4, Ig4 Ig2, Ig3, Ig4, Ih1, Ih2, Ih3, Ih4, Ii1, Ii2, Ii3, Ii4, Ij1, Ij2, Ij3, Ij4, Ik1, Ik2, Ik3, Ik4, Im1, Im2, Im3, Im4 Light source image Im2 Ia3 ′, Ia4 ′, Ib2 ′, Ib3 ′, Ib4 ′, c2 ′, Ic3 ′, Ic4 ′, Id2 ′, Id3 ′, Id4 ′, Ie2 ′, Ie3 ′, Ie4 ′, If2 ′, If3 ′, If4 ′, Ig2 ′, Ig3 ′, Ig4 ′, Ih2 ′, Ih3 ′ , Ih4 ′, Ii2 ′, Ii3 ′, Ii4 ′, Ij2 ′, Ij3 ′, Ij4 ′, Ik2 ′, Ik3 ′, Ik4 ′, Im2 ′, Im3 ′, Im4 ′ Virtual light source image PH High beam light distribution pattern P1 , P2, P3, P4 Points Za, Zb, Zc, Zd, Ze, Zf, Zg, Zh, Zi, Zj, Zk, Zm region

Claims (3)

In a vehicular lamp comprising: a light source disposed on an optical axis extending in the front-rear direction of the lamp; and a reflector made of a translucent member that reflects light from the light source toward the front of the lamp.
The inner surface of the reflector reflects light from the light source in a direction substantially parallel to the optical axis in the vertical direction and in a direction approaching the optical axis in the horizontal direction. It is composed of formed curved surfaces,
The outer surface of the reflector is composed of a plurality of protrusions extending substantially radially with respect to the optical axis,
Each of these ridges is composed of a total reflection prism whose cross-sectional shape along a plane orthogonal to the optical axis is set to a substantially V shape, and each of these ridges is in front view of the lamp A vehicular lamp, wherein the vehicular lamp is formed so as to be curved and extend in a direction away from a horizontal plane including the optical axis in a radially outward direction with respect to a straight line extending in a radial direction from the optical axis. . In a vehicular lamp comprising: a light source disposed on an optical axis extending in the front-rear direction of the lamp; and a reflector made of a translucent member that reflects light from the light source toward the front of the lamp.
The inner surface of the reflector reflects light from the light source in a direction substantially parallel to the optical axis in the vertical direction and in a direction away from the optical axis in the horizontal direction. It is composed of formed curved surfaces,
The outer surface of the reflector is composed of a plurality of protrusions extending substantially radially with respect to the optical axis,
Each of these ridges is composed of a total reflection prism whose cross-sectional shape along a plane orthogonal to the optical axis is set to a substantially V shape, and each of these ridges is in front view of the lamp The vehicle is characterized in that it is formed so as to be curved and extend in a direction away from a vertical plane including the optical axis, outward in the radial direction with respect to a straight line extending in the radial direction from the optical axis. Light fixture.   The degree of curvature of each of the protrusions is light from the light source reflected at each point on the inner surface of the reflector, and light from the light source that is incident on each point and reflected from the outer surface of the reflector. 3. The vehicular lamp according to claim 1, wherein the vehicular lamp is set to a value that emits light in substantially the same direction toward the front of the lamp.

Images