JP2015022963A - Vehicular light guide member, and vehicular lamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that, in a conventional vehicular light guide member and a vehicular lamp device, it is difficult to emit light to the outside efficiently.SOLUTION: A light guide member 3 of the invention guides light by utilizing total reflection. The light guide member has an incident surface 30 at one end face, an emission surface 31 at one side face, and a reflection surface 32 at the other side face. The reflection surface 32 is composed of a plurality of ellipsoidal reflection surfaces which are continuously formed in a light guide direction. As a result, the light guide member can efficiently emit light which is reduced in loss to the outside by means of the ellipsoidal reflection surface 32.

Description

  The present invention relates to a light guide member for a vehicle. The present invention also relates to a vehicular lamp including a vehicular light guide member.

  Conventionally, a vehicle light guide member and a vehicle lamp provided with a vehicle light guide member are known (for example, Patent Document 1 and Patent Document 2). Hereinafter, conventional light guide members for vehicles and vehicle lamps will be described. A conventional vehicular lamp of Patent Document 1 includes a light source and a light guide column, and is provided with a plurality of sawtooth notches on the rear surface portion of the light guide column. When light from the light source is incident from one end surface of the light guide column, the incident light is reflected by the reflection surface of the notch and is emitted to the outside from the front portion of the light guide column. The conventional light guide lens of Patent Document 2 is provided with a plurality of V-shaped notch grooves on one side. When light from the light source is incident from one end surface, the incident light is reflected by the reflecting surface of the cutout groove and emitted to the outside from the other side.

JP 2011-3281 A JP 2012-204030 A

  However, the conventional vehicular lamp of Patent Document 1 is provided with a plurality of sawtooth notches on the rear surface of the light guide column. For this reason, the light incident on the light guide column is once emitted from the reflecting surface of the notch into the outside air, and the emitted light is incident on the light guide column again from the stepped surface of the notch. Reflects on the reflective surface. As a result, when the light exits from the reflecting surface of the notch and when the light enters again from the stepped surface of the notch, boundary surface reflection occurs and light is lost. That is, since the light after loss is emitted to the front side of the vehicle, it is difficult to efficiently emit the light to the outside.

  The conventional light guide lens of Patent Document 2 is provided with a plurality of V-shaped notch grooves on one side. For this reason, the light incident on the light guide lens is once emitted from the reflecting surface of the notch groove into the outside air, and the emitted light is incident again on the light guide lens from the step surface of the notch groove, and is incident again. Light is reflected by the reflective surface of the cutout groove. As a result, when the light exits from the reflecting surface of the notch groove, or when the light enters again from the stepped surface of the notch groove, boundary surface reflection occurs and the light is lost. That is, since the light after loss is emitted to the front side of the vehicle, it is difficult to efficiently emit the light to the outside.

  The problem to be solved by the present invention is that it is difficult to efficiently emit light to the outside in the conventional vehicle light guide member and vehicle lamp.

  The present invention (the invention according to claim 1) is a light guide member for a vehicle that has a rod shape that guides light by utilizing total internal reflection, and is incident on an incident surface of one end surface on which light is incident. A paraboloid having a light emitting surface on one side for emitting light and a reflecting surface on the other side for reflecting incident light to the light emitting surface, and a plurality of reflecting surfaces are continuously provided in the light guide direction. It consists of a surface-shaped reflective surface.

  This invention (the invention according to claim 2) is characterized in that the focal point of the paraboloid of the reflecting surface is inside.

  This invention (invention according to claim 3) is characterized in that the axis of the paraboloid of the reflecting surface is inclined toward the other end surface side of the light guide member for vehicles.

  This invention (the invention according to claim 4) is characterized in that the focal length of the paraboloid of the reflecting surface increases as it goes toward the other end surface of the light guide member for a vehicle.

  The present invention (invention according to claim 5) is a lamp housing and a lamp lens that define a lamp chamber, a light source disposed in the lamp chamber, and the vehicle according to any one of the first to fourth aspects. And a light guide member.

  In the present invention (the invention according to claim 6), the light guide member for a vehicle is arranged to be inclined from the rear side to the front side of the vehicle from the outside to the inside of the vehicle, and the incident surface and the light source are on the outside of the vehicle. It is characterized by being arranged.

  In the vehicle light guide member and the vehicle lamp according to the present invention, since the reflection surface is a parabolic reflection surface, the light incident on the light guide member is reflected by the reflection surface. For this reason, the light incident on the light guide member is once emitted from the reflection surface into the outside air, and the emitted light is incident on the light guide member again from the step surface, and the light incident again is reflected by the reflection surface. There is almost no optical path to do. As a result, as compared with the sawtooth notch and the V-shaped notch groove, the interface reflection occurs and the degree of light loss is small, so that the light can be efficiently emitted to the outside.

FIG. 1 is a front view (a front view excluding a lamp lens) showing Embodiment 1 of a vehicle light guide member and a vehicle lamp according to the present invention. FIG. 2 is a plan view showing a part of the light guide member, the light source, and the inner panel. FIG. 3 is a front view (a view taken in the direction of arrow III in FIG. 2) showing part of the light guide member. FIG. 4 is a rear view (a view taken along arrow IV in FIG. 2) showing a part of the light guide member. FIG. 5 is an explanatory diagram (an enlarged cross-sectional view taken along the line V-V in FIG. 3) illustrating the optical path in the light guide member and the light emitted from the light guide member. FIG. 6 is an explanatory diagram (partially enlarged cross-sectional view taken along the line VI-VI in FIG. 3) showing the optical path in the light guide member and the light emitted from the light guide member. FIG. 7 is an explanatory diagram (an explanatory diagram substantially corresponding to FIG. 6) showing the principle that light can be efficiently emitted to the outside as compared with the prior art. FIG. 8 is an explanatory diagram showing the principle that light can be used effectively when the focal point of the paraboloid of the reflecting surface is inside (explanation showing the effective utilization rate of light from the focal point for each focal point position). Figure). FIG. 9 is an explanatory diagram showing the principle that light can be used effectively when the axis of the paraboloid of the reflecting surface is inclined in the light guide direction. FIG. 10 is a partially enlarged cross-sectional view (an explanatory view substantially corresponding to FIG. 6) of the light guide member showing Embodiment 2 of the vehicle light guide member and the vehicle lamp according to the present invention.

  Hereinafter, two examples of embodiments (examples) of the vehicle light guide member and the vehicle lamp according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In this specification and the appended claims, front, rear, upper, lower, left, and right are front, rear, and upper when a vehicle light guide member and a vehicle lamp according to the present invention are mounted on a vehicle. , Down, left, right.

  In the drawings, the symbol “F” indicates the front side of the vehicle (the forward direction side of the vehicle). The symbol “B” indicates the rear side of the vehicle. The symbol “U” indicates the upper side when the front side is viewed from the driver side. The symbol “D” indicates the lower side when the front side is viewed from the driver side. The symbol “L” indicates the left side when the front side is viewed from the driver side. The symbol “R” indicates the right side when the front side is viewed from the driver side. Moreover, in FIGS. 5-10, hatching of the light guide member for vehicles is abbreviate | omitted.

(Description of Configuration of Embodiment 1)
1 to 9 show Embodiment 1 of a vehicle light guide member and a vehicle lamp according to the present invention. Hereinafter, the configuration of the vehicle light guide member and the vehicle lamp according to the first embodiment will be described. In FIG. 1, reference numeral 1 denotes a vehicular lamp according to the first embodiment. The vehicle lamp 1 is a daytime running lamp such as a front combination lamp such as a vehicle headlamp or a headlamp.

  The vehicular lamp 1 is mounted on left and right sides L and R of a front portion of a vehicle (not shown). In the left vehicle lamp 1 mounted on the left side L of the vehicle, the vehicle outer side is the left side L and the vehicle inner side is the right side R. On the other hand, in the right vehicle lamp mounted on the right side R of the vehicle, the vehicle outer side is the right side R and the vehicle inner side is the left side L.

  Hereinafter, the left vehicle lamp 1 mounted on the left side L of the vehicle will be described. The right side vehicle lamp mounted on the right side R of the vehicle has the same configuration as that of the left side vehicle lamp 1 except for the left and right, and the description thereof is omitted.

(Description of vehicle lamp 1)
As shown in FIG. 1, the vehicular lamp 1 includes a semiconductor light source 2 as one light source, a light guide member 3 as a vehicle light guide member according to the first embodiment, and other components. A low beam headlamp 4 and a high beam headlamp 5 as a lamp unit, a lamp housing 6, a lamp lens (not shown) (for example, a plain outer cover, an outer lens, etc.), and an inner panel (inner housing) 8 are provided. It is to be prepared.

  The semiconductor-type light source 2 and the light guide member 3 constitute a daytime running lamp. The semiconductor light source 2, the light guide member 3, the low beam headlamp 4, the high beam headlamp 5, and the inner panel 8 are in a lamp chamber 7 defined by the lamp housing 6 and the lamp lens. Has been placed. The semiconductor-type light source 2 and a part of the light guide member 3 are covered and hidden by the inner panel 8 when viewed from the lamp lens.

  In the lamp chamber 7, the semiconductor light source 2 and the light guide member 3 as the daytime running lamp, the low beam headlamp 4 and the high beam headlamp 5 as the other lamp units are provided. In addition, other lamp units (not shown) such as a fog lamp, a clearance lamp, a turn signal lamp, and a cornering lamp may be arranged.

(Description of the semiconductor-type light source 2)
As shown in FIGS. 1 and 2, the semiconductor-type light source 2 is a self-luminous semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL) in this example. The semiconductor light source 2 includes a light emitting unit 20 and a substrate 21. The semiconductor-type light source 2 is disposed outside the vehicle in the lamp chamber 7 (on the left side L), on the rear side B, and on the upper side U. The semiconductor-type light source 2 is attached to the lamp housing 6 directly or via another member (not shown).

(Description of the light guide member 3)
The light guide member 3 is a member that guides light from the semiconductor light source 2 from the incident surface 30 to the output surface 31. In this example, the light guide member 3 is made of a transparent resin material such as acrylic resin or PC (polycarbonate). The light guide member 3 has an equivalent or substantially equivalent circular cylindrical shape, ie, a round bar shape, from one end to the other end. The diameter of the light guide member 3 is about 6 to 8 mm in this example.

  As shown in FIG. 1, the light guide member 3 includes a vertical portion 3V on one end side and a horizontal portion 3H on the other end side. That is, the light guide member 3 has an inverted L shape when viewed from the front. In addition, although the said light guide member 3 makes | forms an inverted L shape in this example, what is necessary is just the shape along the shape of the said vehicle lamp 1, and a shape is not specifically limited. The vertical portion 3V of the light guide member 3 is disposed along the outer (left side L) side of the vehicle in the lamp chamber 7, and the horizontal portion 3H of the light guide member 3 is the lamp chamber. 7 along the lower D side.

  As shown in FIG. 2, the light guide member 3 is inclined from the rear side B of the vehicle to the front side F from the outside (left side L) to the inside (right side R) of the vehicle in the lamp chamber 7 in plan view. Has been placed. The light guide member 3 is attached to the lamp housing 6 directly or via another member (not shown). For example, an attachment piece (not shown) provided integrally with the light guide member 3 is attached to the lamp housing 6 directly or via another member (not shown).

  The light guide member 3 guides light by utilizing total internal reflection. The light guide member 3 includes an incident surface 30 at one end surface, one side surface (front surface), that is, an output surface 31 on the front side F, another side surface (back surface), that is, a reflection surface 32 on the rear side B, and the other end surface 33. It is to be prepared.

(Description of the incident surface 30)
The incident surface 30 faces the light emitting unit 20 of the semiconductor light source 2. The incident surface 30 is a flat surface, a curved surface, or a combination of a flat surface and a curved surface. The incident surface 30 allows light emitted from the light emitting unit 20 to enter the light guide member 3. As shown in FIG. 2, the incident surface 30 and the semiconductor-type light source 2 are arranged on the outer side (left side L) and the rear side B of the vehicle.

(Description of the exit surface 31)
The exit surface 31 faces the lamp lens. As shown in FIG. 5, the emission surface 31 is an arc surface having a circular cross section of the light guide member 3. The exit surface 31 causes the light (incident light) L1 incident from the entrance surface 30 into the light guide member 3 to be emitted from the light guide member 3 to the outside as the exit light L2.

(Description of the reflective surface 32)
The reflection surface 32 reflects incident light L1 incident on the light guide member 3 from the incident surface 30 to the emission surface 31 as reflected light L3. As shown in FIGS. 4 to 6, a large number of the reflecting surfaces 32 are continuously provided in the light guide direction, that is, in the direction of the center line (center axis) of the light guide member 3 having a circular cross section. It consists of a parabolic reflecting surface (parabolic reflecting surface). The reflection surface 32 is not provided at a portion that is one end portion of the light guide member 3 on the incident surface 30 side and is covered with the inner panel 8. The width of the reflecting surface 32 is about 2 mm in this example.

  A flat (or curved) stepped surface 34 is interposed between the reflecting surface 32 having a parabolic shape and the reflecting surface 32. That is, a large number of the reflecting surfaces 32 are provided continuously via the step surface 34. One reflection surface 32 and one step surface 34 form one prism.

  The reflecting surface 32 forms a parabolic surface in which a parabola is extended in the radial direction of the light guide member 3. The focal point F of the paraboloid of the reflecting surface 32 is a focal line in the radial direction of the light guide member 3. As shown in FIG. 6, the focal point F of the parabolic surface of the reflecting surface 32 is in the light guide member 3, that is, inside. In FIG. 6, the symbol “N” is a normal to the reflecting surface 32.

  The axis Z of the paraboloid of the reflecting surface 32 (see the two-dot chain line in FIG. 9) is the parabolic axis of the reference reflecting surface 35 (see the solid line in FIG. 9), as indicated by the solid arrow in FIG. With respect to the axis Z1 of the object plane, with respect to the focal point F, on the other end surface 33 side, that is, on the light guide direction side (the direction side that guides the light of the light guide member 3 from the incident surface 30 to the other end surface 33). Inclined. In FIG. 9, the symbol “N” is a normal line to the reflection surface 32 and the reference reflection surface 35.

  The reference reflecting surface 35 reflects the incident light L1 passing through the focal point F, and the reflected light L3 is emitted from the emitting surface 31 as emitted light L2 parallel or substantially parallel to the lamp optical axis (vehicle axis) FB. It is a reflective surface for emitting.

(Description of the operation of the first embodiment)
The light guide member 3 and the vehicle lamp 1 according to the first embodiment are configured as described above, and the operation thereof will be described below.

  The light emitting unit 20 of the semiconductor light source 2 is turned on. Then, the light emitted from the light emitting unit 20 enters the light guide member 3 from the incident surface 30 of the light guide member 3. Incident light L1 incident on the light guide member 3 is guided through the light guide member 3 from the incident surface 30 at one end to the other end surface 33 side while repeating total reflection.

  A part of the incident light L1 guided from one end to the other end in the light guide member 3 is reflected by the reflecting surface 32 toward the emitting surface 31 as reflected light L3. A part of the reflected light L3 is emitted from the emission surface 31 to the outside as the emitted light L2 to the front side F of the vehicle in parallel or substantially parallel to the lamp optical axis (vehicle axis) FB.

  The remainder of the incident light L1 is guided to the other end surface 33 side through the light guide member 3 by total reflection, a part thereof is reflected by the reflecting surface 32 as described above, and the rest is guided to the other end surface 33 side. Further, the remainder of the reflected light L3 is totally reflected at the exit surface 31 and guided through the light guide member 3 to the other end surface 33 side, part of which is reflected by the reflecting surface 32 as described above, and the rest is the other end surface. Guided to the 33rd side.

  Thus, the emitted light L2 parallel to or substantially parallel to the lamp optical axis (vehicle axis) FB from the emitting surface 31 from the one end portion on the incident surface 30 side to the other end portion on the other end surface 33 side of the light guide member 3. Is emitted to the front side F of the vehicle. As a result, the light emitting surface 31 of the light guide member 3 in a line shape (a line shape in a reverse L shape in front view in FIG. 1) emits light.

(Description of the effect of Embodiment 1)
The light guide member 3 and the vehicle lamp 1 according to the first embodiment are configured and operated as described above, and the effects thereof will be described below.

  In the light guide member 3 and the vehicular lamp 1 according to the first embodiment, since the reflection surface 32 is a parabolic reflection surface, the light (incident light) L1 incident on the light guide member 3 is reflected on the reflection surface 32. reflect. For this reason, the light (incident light) L1 incident on the light guide member 3 is once emitted from the reflecting surface 32 into the outside air, and the emitted light is incident on the light guide member 3 again from the step surface 34, There is almost no optical path in which the incident light is reflected by the reflecting surface 32. As a result, as compared with the sawtooth notch and the V-shaped notch groove, the interface reflection occurs and the degree of light loss is small, so that the light can be efficiently emitted to the outside. In particular, the light guide member 3 is disposed so as to be inclined from the rear side B to the front side F of the vehicle from the outside (left side L) to the inside (right side R) of the vehicle in plan view, and the emitted light L2 is a lamp. When the light is emitted to the front side F of the vehicle in parallel or substantially parallel to the optical axis (vehicle axis) FB, the light can be efficiently emitted to the outside.

  Hereinafter, this will be described in detail with reference to FIG. (A) shows the light guide member 3 concerning this Embodiment 1. FIG. (B) shows a conventional light guide member (light guide column, light guide lens) 9 composed of a serrated notch and a V-shaped notch groove. In FIG. 7, the light guide members 3 and 9 are disposed so as to be inclined from the rear side B to the front side F of the vehicle from the outside (left side L) to the inside (right side R) of the vehicle in plan view. The light guide members 3 and 9 emit the emitted lights L2 and L20 to the front side F of the vehicle in parallel or substantially parallel to the lamp optical axis (vehicle axis) FB.

  In (B), the incident light L10 incident on the light guide member 9 is temporarily emitted into the external air from the reflection surface 90 of the notch and notch groove, and the emitted light is emitted from the step surface 91 of the notch and notch groove. The light enters the light guide member 9 again, and the light incident again is reflected by the reflection surface 90 of the notch and the notch groove. The reflected light L30 is emitted from the emission surface 92 to the front side F of the vehicle as the emitted light L20. Thus, in the conventional light guide member 9, the said optical path is most. For this reason, when the incident light L10 is emitted from the reflection surface 90 of the notch and notch groove, and when the emitted light is incident again from the step surface 91 of the notch and notch groove, boundary surface reflection occurs. , The light is lost. That is, the conventional light guide member 9 emits the light after loss as the emitted light L20 to the front side F of the vehicle, so that it is difficult to efficiently emit the light to the outside.

  On the other hand, in (A), the optical path in which the incident light L1 incident on the light guide member 3 is reflected by the reflecting surface 32 is almost all. On the contrary, the incident light L1 incident on the light guide member 3 is once emitted from the reflecting surface 32 into the outside air, and the emitted light is incident again on the light guide member 3 from the step surface 34, and the light incident again. There is almost no optical path that is reflected by the reflecting surface 32. As a result, as compared with the sawtooth notch and the V-shaped notch groove, the interface reflection occurs and the degree of light loss is small, so that the light can be efficiently emitted to the outside.

  In the light guide member 3 and the vehicular lamp 1 according to the first embodiment, the focal point F of the paraboloid of the reflection surface 32 is included in the light guide member 3, that is, inside, so that the light guide member 3 and the vehicle lamp 1 enter the light guide member 3. Light can be used effectively.

  Hereinafter, the relative relationship between the positions of the focal points FA, FB, and FC of the parabolic reflecting surfaces 38A, 38B, and 38C and the effective utilization rates of the light LA, LB, and LC will be described with reference to FIG.

  FIG. 8A is an explanatory diagram showing a structure in which the focal point FA of the reflecting surface 38A is located at or near the boundary surface between the outside and the light guide member 3A. FIG. 8B is an explanatory diagram showing a structure in which the focal point FB of the reflecting surface 38B is located in the light guide member 3B rather than the boundary surface between the outside and the light guide member 3B. FIG. 8C is an explanatory diagram showing a structure in which the focal point FC of the reflecting surface 38C is located outside the light guide member 3C with respect to the boundary surface between the outside and the light guide member 3A. In FIG. 8B, the symbol “N” is a normal to the reflecting surface 38B, and the angle θ ° is equal to or greater than the minimum total reflection angle (θ ° ≧ minimum total reflection angle).

  Here, the effective utilization rate of the light LA, LB, and LC incident on the reflecting surfaces 38A, 38B, and 38C from the focal points FA, FB, and FC is the radiation angle A ° of the light LA, LB, and LC at the focal points FA, FB, and FC. , B ° and C ° are higher as they are larger. As shown in FIGS. 8A, 8B, and 8C, the radiation angle is B °> A °> C °. For this reason, the effective utilization rate of the light LA, LB, and LC is the structure of FIG. 8B> the structure of FIG. 8A> the structure of FIG. 8C. As described above, the light guide member 3 and the vehicular lamp 1 according to the first embodiment can effectively use the light incident and guided into the light guide member 3.

  In the light guide member 3 and the vehicular lamp 1 according to the first embodiment, the parabolic surface axis Z of the reflective surface 32 is different from the parabolic surface axis Z1 of the reference reflective surface 35 around the focal point F. It is inclined toward the end surface 33 side, that is, the light guide direction side (the direction side that guides the light of the light guide member 3 from the incident surface 30 to the other end surface 33 and in the clockwise direction in the direction of the solid arrow in FIG. 9). For this reason, the incident light L 1 can be efficiently reflected by the reflecting surface 32 as compared with the reference reflecting surface 35.

  That is, as shown in FIG. 9, the incident angle θ2 of the incident light L1 on the reflecting surface 32 is larger than the incident angle θ1 of the incident light L1 on the reference reflecting surface 35. For this reason, the reflecting surface 32 can reliably totally reflect a lot of incident light L1 as compared with the reference reflecting surface 35.

(Description of the configuration and effect of the second embodiment)
FIG. 10 shows Embodiment 2 of the vehicle light guide member and the vehicle lamp according to the present invention. Hereinafter, the vehicle light guide member and the vehicle lamp according to the second embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 9 denote the same components.

  In the light guide member 3 of the first embodiment, the focal lengths of the reflecting surfaces 32 are all the same or substantially the same, and the sizes of the reflecting surfaces 32 are all the same or substantially the same. On the other hand, in the light guide member 300 according to the second embodiment, the focal lengths of the reflecting surfaces 321, 322, 323, and 324 having the focal points F1, F2, F3, and F4 are set to the other end surface 33 side, that is, the light guide direction side. The light is increased as it goes from the light guide member 3 toward the other end surface 33.

  Since the light guide member 300 of the second embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the light guide member 3 of the first embodiment. In particular, since the light guide member 300 of the second embodiment increases the focal length of the reflecting surfaces 321 to 324 toward the other end surface 33 side, the size of the reflecting surfaces 321 to 324 is the other end surface 33 side. Grows as you go. As a result, the amount of incident light L1 gradually decreases toward the other end surface 33, but the amount of reflected light L3 from the reflecting surfaces 321 to 324 gradually increases toward the other end surface 33. . In this way, the exit surface 31 can be illuminated almost uniformly from the entrance surface 30 side to the other end surface 33 side.

(Description of examples other than Embodiments 1 and 2)
In the first and second embodiments, a daytime running lamp as a front combination lamp will be described. However, in the present invention, a vehicle lamp other than the daytime running lamp of the front combination lamp, for example, a clearance lamp or turn signal lamp of the front combination lamp, a turn signal lamp, clearance lamp, tail lamp or stop lamp of the rear combination lamp, etc. It can also be applied to.

  In the first and second embodiments, the light guide members 3 and 300 have a circular column shape with a circular cross section. However, in this invention, the light guide member may have a columnar shape such as a cross-sectional triangle, a cross-sectional quadrangle, or a cross-sectional polygon.

  Furthermore, in the said Embodiment 1, 2, the diameter of the light guide member 3 is about 6-8 mm, and the width | variety of the reflective surface 32 is about 6-8 mm. However, in this invention, the dimension of the diameter of the light guide member and the dimension of the width of the reflecting surface are not particularly limited.

  Furthermore, in the first and second embodiments, the light guide member 3 has a reverse L-shape when viewed from the front. However, in the present invention, the shape of the light guide member is not particularly limited.

  Furthermore, in the first and second embodiments, the light guide member 3 is disposed so as to be inclined from the rear side B to the front side F of the vehicle from the outer side (left side L) to the inner side (right side R) of the vehicle in plan view. It is what. However, in the present invention, the arrangement of the light guide members is not particularly limited.

  Furthermore, in the first and second embodiments, the emitted light L2 is emitted to the front side F of the vehicle in parallel or substantially parallel to the lamp optical axis (vehicle axis) FB. However, in the present invention, the emission direction of the emitted light is not particularly limited.

  Furthermore, in the first and second embodiments, the parabolic surface axis Z of the reflecting surface 32 is inclined toward the other end surface 33 with the focal point F as the center with respect to the parabolic surface axis Z1 of the reference reflecting surface 35. It is what. However, in the present invention, the inclination of the axis of the paraboloid of the reflecting surface is not particularly limited.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Semiconductor type light source 20 Light emission part 21 Board | substrate 3, 3A, 3B, 3C, 300 Light guide member 3V Vertical part 3H Horizontal part 30 Incident surface 31 Output surface 32, 321, 322, 323, 324 Reflective surface 33 Other End surface 34 Stepped surface 35 Reference reflecting surface 38A, 38B, 38C Reflecting surface 4 Low beam headlamp 5 High beam headlamp 6 Lamp housing 7 Lamp chamber 8 Inner panel 9 Light guide member 90 Reflecting surface 91 Stepped surface 92 Output surface F Front side B Rear U Upper D Lower L Left (Vehicle outside)
R right side (vehicle inside)
F, F1, F2, F3, F4, FA, FB, FC Focus L1, L10 Incident light L2, L20 Outgoing light L3, L30 Reflected light LA, LB, LC light N Normal A °, B °, C °, θ ° Angle θ1, θ2 Incident angle

Claims (6)

A vehicle light guide member that has a bar shape that guides light using total internal reflection,
An incident surface of one end surface on which light is incident;
An emission surface on one side surface that emits incident light;
A reflection surface on the other side surface that reflects incident light to the emission surface side;
With
The reflecting surface is a parabolic reflecting surface that is continuously provided in the light guide direction.
The light guide member for vehicles characterized by the above-mentioned. The focal point of the paraboloid of the reflecting surface is inside,
The light guide member for a vehicle according to claim 1. The axis of the parabolic surface of the reflecting surface is inclined toward the other end surface side of the vehicle light guide member.
The light guide member for a vehicle according to claim 1, wherein the light guide member is for a vehicle. The focal length of the parabolic surface of the reflecting surface is larger as going to the other end surface side of the vehicle light guide member,
The vehicle light guide member according to any one of claims 1 to 3, wherein A lamp housing and a lamp lens that partition the lamp chamber;
The light source disposed in the lamp chamber and the vehicle light guide member according to any one of claims 1 to 4,
Comprising
A vehicular lamp characterized by the above. The vehicle light guide member is arranged to be inclined from the rear side of the vehicle to the front side from the outside to the inside of the vehicle,
The entrance surface and the light source are disposed outside the vehicle.
The vehicular lamp according to claim 5.

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