JP5571516B2 - Vehicle signal lights - Google Patents

Description

  The present invention relates to a vehicular signal lamp.

  The projector-type vehicle lamp includes a light source, an ellipsoidal reflector, and a projection lens (see, for example, Patent Document 1). The ellipsoidal reflector has a first focal point on the rear side and a second focal point on the front side, the projection lens is arranged in front of the ellipsoidal reflector, and the focal point of the projection lens is in the vicinity of the second focal point of the elliptical reflector. The light source is disposed near the first focal point of the ellipsoidal reflector. The light emitted from the light source is reflected forward by the ellipsoidal reflector, and the reflected light is collected at the second focal point. The reflected light collected at the second focal point is projected forward by the projection lens. Since the focal point of the projection lens is located in the vicinity of the second focal point of the ellipsoidal reflector, the light projected forward by the projection lens is substantially parallel light. Such a projector-type vehicular lamp is generally used for a headlamp.

JP 2007-12477 A

By the way, in order to improve the design of the vehicle, if a projector-type vehicle lamp is used as a signal lamp such as a DRL (Daytime Running Lamp), a position lamp, a tail lamp, or a brake lamp, it projects forward from the projection lens of the projector-type vehicle lamp. Since the emitted light is substantially parallel light, the projection lens looks bright and shining when the projector type vehicle lamp is viewed from the front. On the other hand, when the projector-type vehicle lamp is viewed obliquely from the front, the projection lens does not appear so bright. For this reason, the range that can be viewed with appropriate brightness becomes narrow, and the projector-type vehicular lamp cannot be used as a signal lamp.
Therefore, the problem to be solved by the present invention is to improve the design of the vehicular signal lamp and to expand the range in which the vehicular signal lamp can be visually recognized with appropriate brightness.

In order to solve the above problems, a vehicle signal lamp according to the present invention includes a light source, a parabolic reflecting surface that has a focal point in the light source or the vicinity thereof, and reflects light emitted from the light source in advance. A convex lens disposed in front of the light source and the parabolic reflecting surface, the parabolic reflecting surface comprising a plurality of strip-shaped reflecting element surfaces extending in the vertical direction when viewed from the front, The reflecting element surface is a convex surface obtained by moving a convex curve convex forward in a horizontal section up and down along a paraboloid of revolution having an axis extending forward from the focal point as a rotation axis, and the convex lens Is inclined along the horizontal plane from the lamp optical axis extending in the front-rear direction, the rear entrance surface of the convex lens is a plane perpendicular to the central axis at the center point, and the front exit surface of the convex lens is the center A spherical convex surface rotationally symmetric about an axis, Tangent on the horizontal cross section of the right edge or left edge of the front exit face of the lens is decided to tilt to the right or left from the lamp optical axis.
The vehicle signal lamp according to the present invention includes a light source, a parabolic reflecting surface that has a focal point at or near the light source, and reflects light emitted from the light source in advance, the light source, and the paraboloid. A convex lens disposed in front of the surface-based reflecting surface, and the parabolic reflecting surface includes a plurality of strip-shaped reflecting element surfaces extending in the vertical direction when viewed from the front, and the reflecting element surface is horizontal. A convex curve that is convex forward in the cross section is a convex surface obtained by moving up and down along a paraboloid of revolution about an axis extending forward from the focal point, and the central axis of the convex lens is the front-rear direction The rear entrance surface of the convex lens is a spherical concave surface that is rotationally symmetric about the central axis, and the front output surface of the convex lens is rotationally symmetric about the central axis. A spherical convex surface, and the front projection of the convex lens Tangent on the horizontal cross section of the right edge or left edge of the face was decided to tilt to the right or left from the lamp optical axis.

  Preferably, the vehicle signal lamp further includes a lens barrel provided between the parabolic reflecting surface and the convex lens so as to surround the convex lens when viewed from the front, and an inner wall surface of the lens barrel Among them, a receiving hole is formed at a focal point of the paraboloidal reflecting surface or a position near the focal point, and the light source is received in the receiving hole.

Preferably, the reflecting element surface, the light emitted from the light source, and and Turkey is reflected in the direction inclined along the horizontal plane with respect to the lamp optical axis.

According to the present invention, the light emitted from the light source is reflected by the parabolic reflecting surface in front, but the reflected light is not collected between the parabolic reflecting surface and the convex lens. The light reflected by the parabolic reflecting surface is projected forward by the convex lens, but the light is collected in front of the convex lens and diverges in front of the condensed spot. Therefore, the light projected forward from the convex lens can be made to have a substantially uniform intensity regardless of the direction. Accordingly, it is possible to widen the range in which the vehicular signal lamp can be visually recognized with appropriate intensity.
In addition, since the parabolic reflecting surface is arranged after the convex lens, when the vehicle signal lamp is viewed from the front, an image reflected on the convex lens is unprecedented. Therefore, the appearance of the vehicular signal lamp can be made novel, and the design of the vehicular signal lamp can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a horizontal sectional view showing a vehicle signal lamp according to a first embodiment of the present invention with a part thereof broken away. It is a front perspective view which shows the signal lamp for vehicles in the state which removed the convex lens from the lens-barrel in the same embodiment. It is drawing for demonstrating the range which a light ray totally reflects on the front side output surface of a convex lens. It is the horizontal sectional view which partially fractured and showed the vehicle signal lamp which concerns on 2nd embodiment of this invention. It is drawing which showed the light distribution of the vehicle signal lamp which concerns on 2nd embodiment of this invention. It is drawing which showed the light distribution of the vehicle signal lamp which concerns on 2nd embodiment of this invention. It is a horizontal sectional view showing an example when the diameter of the convex lens is 60 mm. It is a horizontal sectional view showing an example when the diameter of the convex lens is 60 mm. It is a horizontal sectional view showing an example when the diameter of the convex lens is 60 mm. It is a horizontal sectional view showing an example when the diameter of the convex lens is 45 mm. It is a horizontal sectional view showing an example when the diameter of the convex lens is 45 mm. It is a horizontal sectional view showing an example when the diameter of the convex lens is 45 mm. It is a horizontal sectional view showing an example when the diameter of the convex lens is 30 mm. It is a horizontal sectional view showing an example when the diameter of the convex lens is 30 mm. It is a horizontal sectional view showing an example when the diameter of the convex lens is 30 mm.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

[First Embodiment]
FIG. 1 is a horizontal sectional view showing a vehicle signal lamp 1 with a part thereof broken. The cross section of FIG. 1 is a view broken away along a horizontal plane passing through the optical axis Ax as a lamp and viewed from above.
The vehicle signal lamp 1 is used, for example, as a DRL (Daytime Running Lamp), a position lamp, a tail lamp, a brake lamp, a back lamp, a direction indicator lamp, a high mount stop lamp, or a tail lamp / brake lamp combined lamp. As shown in FIG. 1, the optical axis Ax of the vehicular signal lamp 1 extends in the front-rear direction. The vehicle signal lamp 1 includes a lens barrel 2, light sources 3 and 4, reflectors 5 and 6, a convex lens 7, and the like.

FIG. 2 is a front perspective view showing the vehicular signal lamp 1 with the convex lens 7 removed from the lens barrel 2.
As shown in FIGS. 1 and 2, the lens barrel 2 is formed in a substantially cylindrical shape, and its central axis extends in the front-rear direction. Specifically, the inner wall surface 2b of the lens barrel 2 is a cylindrical surface obtained by rotating a generatrix parallel to the optical axis Ax around the optical axis Ax. On the left and right sides of the inner wall surface 2b of the lens barrel 2, housing holes 2c and 2d are formed. The accommodation hole 2c is arranged at a position that is symmetrical with the accommodation hole 2d with respect to the optical axis Ax, and the accommodation holes 2c and 2d are arranged to face each other.

  The light source 3 is accommodated in the accommodation hole 2c, and the light source 4 is accommodated in the accommodation hole 2d. These light sources 3 and 4 do not protrude to the inner side of the inner wall surface 2b of the lens barrel 2, but are drawn into the receiving holes 2c and 2d from the inner wall surface 2b of the lens barrel 2. The light sources 3 and 4 are light emitting diodes, inorganic electroluminescent elements, organic electroluminescent elements, and other light emitting elements. The light sources 3 and 4 are mounted on the substrates 13 and 14, respectively. The light sources 3 and 4 are inserted into the receiving holes 2c and 2d from the outside of the lens barrel 2, respectively. Abut.

  The light sources 3 and 4 may emit light simultaneously, or the light sources 3 and 4 may emit light at different timings. For example, when the vehicle signal lamp 1 is also used as a tail lamp / brake lamp, when one of the light sources 3 and 4 emits light, the vehicle signal lamp 1 displays the rear part of the vehicle, and both the light sources 3 and 4 When the light is emitted, the vehicular signal lamp 1 displays braking. Of course, when both the light sources 3 and 4 emit light, the vehicle signal lamp 1 displays the rear part of the vehicle, and when both the light sources 3 and 4 emit light with higher intensity, the vehicle signal lamp 1 displays braking. May be.

  The reflectors 5 and 6 are provided at the rear end of the lens barrel 2 so as to close the rear opening of the lens barrel 2, and the lens barrel 2 and the reflectors 5 and 6 are integrally formed. When viewed from the front, the reflector 5 occupies the left side of the optical axis Ax in the region in the lens barrel 2, and the reflector 6 is the right region of the optical axis Ax in the region in the lens barrel 2. Accounted for. And the right end of the reflector 5 and the left end of the reflector 6 are connected, and the reflector 5 and the reflector 6 are integrally molded.

  A concave parabolic reflecting surface 51 is formed on the front surface of the reflector 5. The paraboloidal reflecting surface 51 is composed of a plurality of reflecting element surfaces 51a for aiming the direction of reflected light, with a rotating paraboloid having an axis Ax5 extending forward from the focal point F5 as a rotation axis. . The rotation axis Ax5 of the rotary paraboloid serving as a reference for the parabolic reflecting surface 51 is located on the left side of the optical axis Ax, and the rotation axis Ax5 and the optical axis Ax are substantially parallel to each other. The focal point F5 of the rotating paraboloid serving as a reference for the parabolic reflecting surface 51 is located at the light source 3 or in the vicinity thereof. The reflective element surface 51a is formed in a strip shape extending in the vertical direction when viewed from the front. The cross-sectional shape of the reflecting element surface 51a in the horizontal section is a convex curve having a predetermined curvature, and the reflecting element surface 51a is obtained by moving the convex curve up and down along the reference paraboloid. It is a convex surface. The parabolic reflecting surface 51 is approximated to a rotating paraboloid by these reflecting element surfaces 51a.

  A concave parabolic reflecting surface 61 is formed on the front surface of the reflector 6. The parabolic reflecting surface 61 is a surface approximated to a rotating parabolic surface by a plurality of reflecting element surfaces 61a, like the parabolic reflecting surface 51. The rotation axis Ax6 of the rotary paraboloid serving as a reference for the parabolic reflecting surface 61 is located on the right side of the optical axis Ax, and the rotation axis Ax6 and the optical axis Ax are substantially parallel to each other. The focal point F6 of the rotating paraboloid serving as a reference for the parabolic reflecting surface 61 is located at the light source 4 or in the vicinity thereof.

  The convex lens 7 is attached to the front end of the lens barrel 2 so as to close the front opening 2a of the lens barrel 2, and the lens barrel 2 is provided so as to surround the convex lens 7 when viewed from the front. The convex lens 7 is a plano-convex lens, the rear entrance surface 7a of the convex lens 7 is a flat surface, and the front exit surface 7b of the convex lens 7 is a spherical convex surface. The front emission surface 7b is a spherical surface that is rotationally symmetric about a central axis (rotation symmetry axis) Ax7 orthogonal to the rear incidence surface 7a at the center point of the rear incidence surface 7a. The rear incident surface 7a intersects obliquely with respect to the optical axis Ax. The convex lens 7 is tilted so that the central axis Ax7 of the convex lens 7 is tilted to the right along the horizontal plane from the optical axis Ax. Since the convex lens 7 is installed at an inclination, the convex lens 7 is not a rotationally symmetric body with respect to the optical axis Ax, and the front emission surface 7b is aspheric with respect to the optical axis Ax.

As shown in FIG. 3, when the convex lens 7 is viewed from above, the tangent line 7c at the right edge of the front emission surface 7b is inclined rightward from the optical axis Ax along the horizontal plane. This is because the convex lens 7 having the front emission surface 7b having a spherical shape is inclined to the right.
In addition, when comparing the convex lens 7 and the aspherical convex lens 907 having the same aperture, the front emission surface 7b of the convex lens 7 bulges in the direction of the central axis Ax7 relative to the front emission surface 907b of the aspherical convex lens 907.
As shown in FIG. 1, the rear entrance surface 7a of the convex lens 7 is set with an offset of an angle θ (for example, 3 °) with reference to the rear entrance surface 97a of the convex lens before improvement. The curvature of the front exit surface of the convex lens before improvement is the same as the curvature of the front exit surface 7b of the convex lens 7, and the right portion of the front exit surface 7b of the convex lens 7 is more than the right portion of the front exit surface of the convex lens before improvement. Is also getting wider.
Similarly to the vehicular signal lamp 1 using the convex lens 7, the vehicular signal lamp using the above-mentioned aspherical convex lens 907 and the unmodified convex lens in combination with the lens barrel 2, the light sources 3 and 4, and the reflectors 5 and 6 are also disclosed. Included in the range.

The action of light by the vehicle signal lamp 1 will be described.
The light source 3 emits light, and the light emitted from the light source 3 is reflected forward by the parabolic reflecting surface 51. Since the parabolic reflecting surface 51 is based on the rotating parabolic surface, the reflected light from the parabolic reflecting surface 51 is substantially parallel light. In addition, since the paraboloidal reflecting surface 51 includes a plurality of reflecting element surfaces 51a for aiming, the direction of the reflected light reflected by the parabolic reflecting surface 51 is tilted to the left along the horizontal plane from the optical axis Ax. The direction.

  On the other hand, the light emitted from the light source 4 is reflected forward by the parabolic reflecting surface 61 as substantially parallel light, and the direction of the reflected light deflected by the reflecting element surface 61a is right from the optical axis Ax along the horizontal plane. The direction is inclined.

  The light reflected by the parabolic reflecting surfaces 51 and 61 is not condensed between the parabolic reflecting surfaces 51 and 61 and the convex lens 7. This is because the parabolic reflecting surfaces 51 and 61 are based on the rotating paraboloid, and the reflected light from the parabolic reflecting surfaces 51 and 61 is substantially parallel light.

  The light reflected by the parabolic reflecting surfaces 51 and 61 is incident on the rear entrance surface 7a of the convex lens 7 and refracted, and the incident light exits from the front exit surface 7b of the convex lens 7 and is refracted. Thus, the light projected forward by the convex lens 7 is collected in a region α (see FIG. 1) in front of the convex lens 7. The light that has passed through the region α diverges with the region α as the origin.

  As described above, since the light incident on the convex lens 7 is substantially parallel light, the light is condensed in the region α immediately in front of the convex lens 7 and becomes divergent light in front of it. Therefore, even when the convex lens 7 is viewed from the front of the convex lens 7, so-called spotlight does not occur. Spotted light means that when the convex lens 7 is viewed from a certain angle in front of the convex lens 7, it appears brighter than when the convex lens 7 is viewed from another angle. That is, the light projected from the convex lens 7 has a substantially uniform intensity regardless of the direction. Therefore, the range in which the vehicular signal lamp 1 can be visually recognized with appropriate strength is widened.

  Further, since the light sources 3 and 4 are accommodated in the accommodation holes 2c and 2d, respectively, direct light emitted from the light sources 3 and 4 does not enter the convex lens 7, and so-called spotlight can be prevented. Moreover, since the light sources 3 and 4 are hidden when viewed from the front, the appearance of the vehicular signal lamp 1 is improved.

  In addition, since the parabolic reflecting surfaces 51 and 61 are arranged on the rear side and the convex lens 7 is arranged in front of the parabolic reflecting surfaces 51 and 61, an image reflected on the front emitting surface 7b of the convex lens 7 is obtained. It will be something new and unprecedented. Therefore, when the vehicular signal lamp 1 is viewed from the front, the appearance is novel and the design of the vehicular signal lamp 1 is improved.

  In addition, since the convex lens 7 is arranged with the central axis Ax7 of the spherical front emission surface 7b inclined with respect to the optical axis Ax, the amount of light that is internally reflected on the front emission surface 7b and is not emitted forward can be reduced. . Therefore, the light can be used effectively.

  Here, as shown in FIG. 3, in the aspherical convex lens 907, the light ray γ is totally reflected by the front emission surface 907b, light is emitted from the front emission surface 907b on the left side of the light ray γ, and on the right side of the light ray γ. Light does not exit from the front exit surface 907b due to total reflection. Similarly, in the convex lens 7, the light beam β is totally reflected by the front emission surface 7b, light is emitted from the front emission surface 7b on the left side of the light beam β, and light is totally reflected on the right side of the light beam β from the front emission surface 907b. Does not emit by. As is clear from FIG. 3, since the light beam β is on the right side of the light beam γ, the convex lens 7 is narrower than the aspherical convex lens 907 in the range where the light is not emitted by total reflection. Therefore, the light can be used effectively.

  In addition, it is preferable to make the luminescent color of the light sources 3 and 4 according to the signal which the signal lamp 1 for vehicles displays. In addition, when the light emission color of the light sources 3 and 4 is white, a color filter is provided at an appropriate position as necessary, and the direct light of the light sources 3 and 4 and the reflected light from the parabolic reflecting surfaces 51 and 61 are provided. Or you may make it the projection light by the convex lens 7 permeate | transmit a color filter. Further, when the light emission color of the light sources 3 and 4 is white, the convex lens 7 itself may contain a dye or a pigment, and the light previously projected by the convex lens 7 may be discolored by the convex lens 7.

[Second Embodiment]
FIG. 4 is a horizontal sectional view showing the vehicle signal lamp 1A with a part thereof broken. Parts corresponding to each other between the vehicular signal lamp 1A shown in FIG. 4 and the vehicular signal lamp 1 shown in FIG. 1 are denoted by the same reference numerals.

  As shown in FIG. 4, in the vehicle signal lamp 1A, the convex lens 7 is a convex meniscus lens, the rear entrance surface 7a of the convex lens 7 is a spherical concave surface, and the front emission surface 7b of the convex lens 7 is a spherical convex surface. The rear entrance surface 7a and the front exit surface 7b are spherical surfaces that are rotationally symmetric about the central axis Ax7. The convex lens 7 is installed to be tilted to the right, and the central axis Ax7 is tilted to the right along the horizontal plane from the optical axis Ax.

  Except for what has been described above, portions corresponding to each other between the vehicle signal lamp 1 </ b> A and the vehicle signal lamp 1 are similarly provided.

  Also in this vehicle signal lamp 1 </ b> A, the light reflected by the parabolic reflecting surfaces 51 and 61 is projected forward by the convex lens 7. The light projected by the convex lens 7 is collected in a region ε (see FIG. 4) in front of the convex lens 7 and diverges in front of the region ε. Therefore, so-called spotlight can be prevented.

  Moreover, since the convex lens 7 is a convex meniscus lens, the convex lens 7 can be made thin.

  Further, since the convex lens 7 is a convex meniscus lens, the luminous flux utilization rate is further improved. That is, in the plano-convex lens 7 shown in FIG. 1, the light is internally reflected at the peripheral edge of the front emission surface 7b (outside the light beam β shown in FIG. 3), whereas in FIG. In the convex meniscus lens 7, the range of the peripheral portion where the light is internally reflected can be narrowed.

  FIG. 5 shows the light distribution of the vehicle signal lamp 1A shown in FIG. 4 in gray scale. FIG. 6 shows the light distribution of the vehicular signal lamp 1 shown in FIG. 1 in gray scale. In FIGS. 5 and 6, the light intensity increases as the color becomes white.

  As shown in FIGS. 5 and 6, the vehicle signal lamp 1 </ b> A has a higher luminous intensity than the vehicle signal lamp 1 in the central portion (in the range of 10 ° up and down and 20 ° left and right defined by the ECE standard). .

  When the luminous flux utilization factor of the vehicular signal lamp 1 is 2.40 lm, the luminous flux utilization factor of the vehicular signal lamp 1A in which the conditions other than the convex lens 7 are the same as those of the vehicular signal lamp 1 is 3.26 lm.

[Modification]
Embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.
For example, the convex lens 7 is not limited to a plano-convex lens or a convex meniscus lens, but may be another convex lens. For example, the convex lens 7 may be an aspherical convex lens.
Further, although the central axis Ax7 of the convex lens 7 is inclined with respect to the optical axis Ax, the central axis Ax7 of the convex lens 7 may be parallel to the optical axis Ax.

(1) When the diameter of the convex lens is 60 mm FIG. 7 is a horizontal sectional view showing the vehicular signal lamp 1. FIG. 8 is a horizontal sectional view showing the vehicle signal lamp 1A. FIG. 9 shows a vehicle signal lamp 901. A vehicle signal lamp 901 shown in FIG. 9 is obtained by replacing the convex lens 7 of the vehicle signal lamp 1 shown in FIG. 7 with an aspherical convex lens 907.

As shown in FIG. 7, the convex lens 7 is disposed at an angle of 28.6 ° from the position facing the optical axis Ax. A tangent line 7c at the right edge of the front emission surface 7b of the convex lens 7 is inclined by 9.44 ° to the right from the optical axis Ax.
In the case of the vehicle signal lamp 1 </ b> A shown in FIG. 8, the tangent line 7 c at the right edge of the front emission surface 7 b of the convex lens 7 is inclined by 1.37 ° to the right from the optical axis Ax.
On the other hand, as shown in FIG. 9, the tangent 907c at the right edge of the front exit surface 907b of the aspherical convex lens 907 is tilted by 6.52 ° to the left from the optical axis Ax.

  As is apparent from FIGS. 7 to 9, the front emission surface 7b of the convex lens 7 shown in FIGS. 7 and 8 bulges in the direction of the central axis Ax7 relative to the front emission surface 907b of the aspherical convex lens 907 shown in FIG. In addition, the tangent line 7c shown in FIGS. 7 and 8 is tilted to the right more than the tangent line 907c shown in FIG. Therefore, the range in which the light is not emitted by total reflection is narrower in the convex lens 7 shown in FIGS. 7 and 8 than in the aspherical convex lens 907 shown in FIG. 9, and the convex lens 7 shown in FIGS. Can be used.

(2) When the convex lens has a diameter of 45 mm FIG. 10 is a horizontal sectional view showing the vehicular signal lamp 1. FIG. 11 is a horizontal sectional view showing the vehicle signal lamp 1A. FIG. 12 shows a vehicular signal lamp 901. A vehicle signal lamp 901 shown in FIG. 12 is obtained by replacing the convex lens 7 of the vehicle signal lamp 1 shown in FIG. 10 with an aspherical convex lens 907.

As shown in FIG. 10, the convex lens 7 is disposed at an angle of 15.18 ° from the position facing the optical axis Ax. A tangent line 7c at the right edge of the front emission surface 7b is inclined by 3.22 ° to the right from the optical axis Ax.
In the case of the vehicle signal lamp 1A shown in FIG. 11, the tangent line 7c at the right edge of the front emission surface 7b is inclined to the left by 12.05 ° from the optical axis Ax.
As shown in FIG. 12, the tangent 907c at the right edge of the front emission surface 907b is tilted to the left by 23.09 ° from the optical axis Ax.
The front emission surface 7b shown in FIGS. 10 and 11 bulges in the direction of the central axis Ax7 relative to the front emission surface 907b shown in FIG. 12, and the tangent line 7c shown in FIG. 10 and FIG. Is also tilted to the right. Therefore, the range in which the light is not emitted by total reflection is narrower in the convex lens 7 shown in FIGS. 10 and 11 than in the aspherical convex lens 907 shown in FIG. 12, and the convex lens 7 shown in FIGS. Can be used.

(3) When the diameter of the convex lens is 30 mm FIG. 13 is a horizontal sectional view showing the vehicular signal lamp 1. FIG. 14 is a horizontal sectional view showing the vehicle signal lamp 1A. FIG. 15 shows a vehicular signal lamp 901. A vehicle signal lamp 901 shown in FIG. 15 is obtained by replacing the convex lens 7 of the vehicle signal lamp 1 shown in FIG. 13 with an aspherical convex lens 907.

As shown in FIG. 13, the convex lens 7 is disposed with an inclination of 7.34 ° from the position facing the optical axis Ax. A tangent line 7c at the right edge of the front emission surface 7b of the convex lens 7 is inclined by 14.32 ° to the left from the optical axis Ax.
In the case of the vehicle signal lamp 1A shown in FIG. 14, the tangent line 7c at the right edge of the front emission surface 7b is inclined to the left by 19.92 ° from the optical axis Ax.
As shown in FIG. 15, the tangent 907c at the right edge of the front exit surface 907b of the aspherical convex lens 907 is tilted 27.3 ° to the left from the optical axis Ax.
The front emission surface 7b shown in FIGS. 13 and 14 bulges in the direction of the central axis Ax7 from the front emission surface 907b shown in FIG. 15, and the tangent 907c shown in FIG. 15 is more than the tangent 7c shown in FIGS. Is also leaning to the left. Therefore, the range in which light is not emitted by total reflection is narrower in the convex lens 7 shown in FIGS. 13 and 14 than in the aspherical convex lens 907 shown in FIG. 15, and the convex lens 7 shown in FIGS. Can be used.

DESCRIPTION OF SYMBOLS 1, 1A, 901 Vehicle signal lamp 2 Lens barrel 2b Inner wall surface 2c, 2d Accommodating hole 3, 4 Light source 7, 907 Convex lens 7a Rear entrance surface 7b Front exit surface 51, 61 Parabolic surface reflection surface 51a, 61a Surface Ax Optical axis Ax7 Central axis F5, F6 Focus

Claims (4)

A light source;
A parabolic reflecting surface that has a focal point at or near the light source and reflects light emitted from the light source forward;
A convex lens disposed in front of the light source and the parabolic reflecting surface ,
The parabolic reflecting surface is composed of a plurality of strip-shaped reflecting element surfaces extending in the vertical direction when viewed from the front,
The reflective element surface is a convex surface obtained by moving a convex curve convex forward in a horizontal section up and down along a paraboloid of revolution about an axis extending forward from the focal point,
The central axis of the convex lens is inclined along the horizontal plane from the lamp optical axis extending in the front-rear direction,
The rear entrance surface of the convex lens is a plane perpendicular to the central axis at its center point, the front exit surface of the convex lens is a spherical convex surface rotationally symmetric about the central axis, and the front exit surface of the convex lens A vehicle signal lamp, wherein a tangent line on a horizontal section at a right edge or a left edge of the lamp is inclined right or left from the lamp optical axis . A light source;
A parabolic reflecting surface that has a focal point at or near the light source and reflects light emitted from the light source forward;
A convex lens disposed in front of the light source and the parabolic reflecting surface ,
The parabolic reflecting surface is composed of a plurality of strip-shaped reflecting element surfaces extending in the vertical direction when viewed from the front,
The reflective element surface is a convex surface obtained by moving a convex curve convex forward in a horizontal section up and down along a paraboloid of revolution about an axis extending forward from the focal point,
The central axis of the convex lens is inclined along the horizontal plane from the lamp optical axis extending in the front-rear direction,
The rear entrance surface of the convex lens is a spherical concave surface rotationally symmetric about the central axis, the front output surface of the convex lens is a spherical convex surface rotationally symmetric about the central axis, and the front output surface of the convex lens A vehicle signal lamp, wherein a tangent line on a horizontal section at a right edge or a left edge of the lamp is inclined right or left from the lamp optical axis . A lens barrel provided between the parabolic reflecting surface and the convex lens so as to surround the convex lens when viewed from the front;
3. A housing hole is formed at a focal point of the parabolic reflecting surface or a position near the focal surface of the inner wall surface of the lens barrel, and the light source is housed in the housing hole. Vehicle signal light according to claim 1. The reflective element surface, wherein the light emitted from the light source, to any one of claims 1 to 3, wherein the benzalkonium is reflected by the inclined orientation along a horizontal plane relative to the lamp optical axis Vehicle signal lights.