JP2015170387A - Vehicular light guide member and vehicular lighting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that in conventional vehicular light guide member and vehicular lighting tool, a mold structure is made complex.SOLUTION: This invention is a light guide member 3 that guides light by utilizing total reflection. The light guide member includes an incidence surface 30 of one end surface, and a main emission surface 31 of one side surface. The main emission surface 31 is provided with a curvature surface 34. On the curvature surface 34, an auxiliary emission surface 35 emitting light made incident is provided perpendicularly to a tangent line T at any point P of a light guide direction Q. Consequently, a mold structure is made simple.

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.

  2. Description of the Related Art Conventionally, a vehicular lamp including a vehicular light guide member and a vehicular light guide member has been conventionally used (for example, Patent Document 1). Hereinafter, the conventional vehicle lamp of Patent Document 1 will be described. In a conventional vehicular lamp, a lamp chamber is formed by a lamp body and an outer cover, a projection lamp unit is disposed in the lamp chamber, and a surface-emitting light guide plate is provided between the outer cover and the projection lens of the projection lamp unit. The extension portion is formed on the upper and lower portions of the surface light-emitting light guide plate, the front end surface of the extension portion is exposed to be opposed to the outer cover, and the LED light source is disposed opposite to the rear end surface of the extension portion. .

  When the light source of the projection lamp unit is turned on, the light from the light source passes through the projection lens and the outer cover and is emitted to the outside (in front of the vehicle). On the other hand, when the LED light source is turned on, the light from the LED light source is incident on the extension from the rear end surface of the surface light-emitting light guide plate, and the light incident on the extension is outer from the front end surface of the extension. Light that passes through the cover and is emitted to the outside (in front of the vehicle) and incident into the extension portion is transmitted from the surface of the surface-emitting light guide plate through the outer cover and is emitted to the outside (in front of the vehicle). In this manner, the light emitting surface on the surface of the surface light emitting light guide plate and the light emitting surface on the front end face of the extension are formed.

JP 2012-64535 A

  However, since the conventional vehicular lamp forms an extension part at the upper part and the lower part of the surface emitting light guide plate, a space is formed between the surface emitting light guide plate and the extension part. For this reason, the mold structure which molds the integral structure of the surface emitting light guide plate and the extension portion with resin becomes complicated.

  The problem to be solved by the present invention is that the mold structure is complicated 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 main exit surface for emitting light, and the main exit surface is provided with a curved surface, and the curved exit surface has an auxiliary exit surface for emitting incident light at any point in the light guide direction. It is characterized by being provided perpendicular or nearly perpendicular to the tangent.

  The present invention (the invention according to claim 2) is characterized in that the auxiliary emission surface forms a control surface for controlling incident light.

  The present invention (invention according to claim 3) includes a lamp housing and a lamp lens that define a lamp chamber, a light source disposed in the lamp chamber, and the vehicle light guide member according to claim 1 or 2, The auxiliary emission surface is opposed to the lamp lens or the inner lens disposed between the lamp lens and the vehicle light guide member.

  This invention (the invention according to claim 4) is characterized in that the lamp lens or the inner lens is provided with a light control unit for controlling light emitted from the auxiliary emission surface.

  Since the vehicle light guide member and the vehicle lamp of the present invention are provided with the auxiliary emission surface on the curved surface of the main emission surface, perpendicular or substantially perpendicular to the tangent at an arbitrary point in the light guide direction, There is no space between the curved surface of the main exit surface and the auxiliary exit surface. For this reason, the mold structure which molds the light guide member for vehicles which has the curved surface of the main outgoing surface and the auxiliary outgoing surface with resin becomes simple compared with the conventional one.

FIG. 1 is a front view showing an embodiment of a vehicle light guide member and a vehicle lamp according to the present invention. FIG. 2 is a side view (right side view, view taken along arrow II in FIG. 1) showing the vehicular lamp. FIG. 3 is a partially enlarged cross-sectional view (partially enlarged cross-sectional view taken along line III-III in FIG. 1) showing a main part of the light guide member. FIG. 4 is an explanatory diagram showing an optical path of light emitted from the auxiliary emission surface of the light guide member. FIG. 5 is a partially enlarged sectional view showing a main part of the vehicular lamp. FIG. 6 is a partially enlarged cross-sectional view (partially enlarged cross-sectional view taken along the line VI-VI in FIG. 1) showing Modification 1 of the light control unit of the vehicular lamp. FIG. 7 is a partially enlarged cross-sectional view (partially enlarged cross-sectional view taken along line VI-VI in FIG. 1) showing a second modification of the light control unit of the vehicle lamp.

  Hereinafter, one example and two modifications of an embodiment (example) of a vehicle light guide member and a 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 and a modification. In this specification, front, rear, upper, lower, left and right are front, rear, upper, lower, left and right when the vehicle light guide member and the vehicle lamp according to the present invention are mounted on the vehicle. is there.

  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. The symbol “I” indicates the inside of the vehicle. The symbol “O” indicates the outside of the vehicle. 3 to 7, the hatching of the vehicle light guide member and the lamp lens is omitted. Further, light is indicated by solid line arrows (linear arrows) in the figure.

(Description of Configuration of Embodiment)
1 to 5 show an embodiment 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 this embodiment will be described. In FIG. 1, reference numeral 1 denotes a vehicular lamp according to this embodiment. The vehicle lamp 1 is, for example, a clearance lamp or a turn signal lamp of 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). The design surface of the front part of the vehicle is directed toward the front of the vehicle (from the rear side B of the vehicle toward the front side F), in the vertical direction (from the upper side U to the lower side D) and in the left-right direction (from the outer side O of the vehicle). Inclined towards the inside I).

  In the right vehicle lamp 1 mounted on the right side R of the vehicle, the vehicle outer side O is the right side R and the vehicle inner side I is the left side L. On the other hand, in the left vehicle lamp mounted on the left side L of the vehicle, the vehicle outer side O is the left side L, and the vehicle inner side I is the right side R.

  Hereinafter, the right vehicle lamp 1 mounted on the right side R of the vehicle will be described. Note that the left-hand vehicular lamp mounted on the left-hand side L of the vehicle has the same configuration as that of the right-hand vehicular lamp 1 and is substantially the same as the other, and a description thereof will be omitted.

(Description of vehicle lamp 1)
As shown in FIGS. 1 and 2, 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 this embodiment, As other lamp units, a low beam headlamp 4 and a high beam headlamp 5, a lamp housing (not shown), a lamp lens (for example, a plain outer cover, an outer lens, etc.) 6, an inner panel (inner housing) 7).

  The semiconductor-type light source 2 and the light guide member 3 constitute a clearance lamp or a turn signal lamp. The semiconductor-type light source 2, the light guide member 3, the low beam headlamp 4, the high beam headlamp 5, and the inner panel 7 are in a lamp chamber 8 that is partitioned by the lamp housing and the lamp lens 6. Has been placed. The semiconductor-type light source 2 and a part of the light guide member 3 are covered with the inner panel 7 when viewed from the lamp lens 6. As shown in FIGS. 1 and 2, most of the light guide member 3, the low beam headlamp 4, the high beam headlamp 5, and the inner panel 7 are visible through the lamp lens 6.

  In the lamp chamber 8, the semiconductor light source 2 and the light guide member 3 as the clearance lamp and the turn signal lamp, and the low beam head lamp 4 and the high beam head as the other lamp units are provided. In addition to the lamp 5, other lamp units (not shown) such as a fog lamp, a daytime running lamp, and a cornering lamp may be arranged.

(Description of the semiconductor-type light source 2)
As shown in FIGS. 2 to 5, 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 on the outside O (right side R), the rear side B, and the upper side U of the vehicle in the lamp chamber 8. The semiconductor-type light source 2 is attached to the lamp housing directly or via another member (not shown).

(Description of the light guide member 3)
The light guide member 3 is a member that guides the light from the semiconductor-type light source 2 from the entrance surface 30 to the main exit surface 31 by using total internal reflection (internal reflection). In this example, the light guide member 3 is made of a transparent resin material such as acrylic resin, PC (polycarbonate), or PMMA (polymethyl methacrylate, methacrylic resin). 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.

  The direction of guiding light of the light guide member 3, that is, the light guide direction Q, is a center line of the light guide member 3 having a circular cross section (center axis line, see the one-dot chain line in FIG. 3B). ) Direction.

  As shown in FIGS. 1 and 2, the light guide member 3 includes a vertical portion 3 </ b> V on one end side and a vertical portion 3 </ b> V on the other end side along the design surface of the front portion of the vehicle and the design surface of the lamp lens 6. It consists of a horizontal part 3H. That is, the light guide member 3 has an L shape when viewed from the front and side. The vertical portion 3V of the light guide member 3 is disposed along the side of the outer side O (right side R) of the vehicle in the lamp chamber 8, and the horizontal portion 3H of the light guide member 3 Arranged along the lower side D of the chamber 8.

  As shown in FIGS. 2 and 3, the light guide member 3 is a lower side from the upper side U of the vehicle toward the front side F from the rear side B of the vehicle in the lamp chamber 8 in a side view (right side view). Inclined toward D. The light guide member 3 is attached to the lamp housing 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 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 the incident surface 30 on one end surface, the side surface (front surface), that is, the main emission surface 31 on the front side F, the other side surface (back surface), that is, the reflection surface 32 on the rear side B, and the other end surface 33. And a curved surface 34, an auxiliary emission surface 35, and a convex portion 36.

(Description of the incident surface 30)
The incident surface 30 faces the light emitting unit 20 of the semiconductor light source 2. The center of the incident surface 30 and the center of the light emitting unit 20 are coincident or substantially coincident with each other. 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 disposed on the outer side O (right side R) and the upper side U of the vehicle.

(Description of the main emission surface 31)
The main exit surface 31 faces the lamp lens 6. The main exit surface 31 is an arc surface having a circular cross section of the light guide member 3. The main exit surface 31 is configured to emit light (incident light) incident on the light guide member 3 from the entrance surface 30 to the outside as the exit light.

(Description of the reflective surface 32)
The reflection surface 32 reflects incident light incident on the light guide member 3 from the incident surface 30 as reflected light toward the main light exit surface 31. As shown in FIGS. 3 to 5, a large number of the reflecting surfaces 32 are continuously provided in the light guide direction Q. 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 7. The width of the reflecting surface 32 is about 2 mm in this example.

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

(Description of curved surface 34)
The curved surface 34 is provided at one end portion of the light guide member 3 on the incident surface 30 side of the main exit surface 31. As shown in FIGS. 3A and 3B, the curved surface 34 faces from the rear side B of the vehicle toward the front side F toward the lower side D of the vehicle from the rear side B of the vehicle. Is curved. In addition, the dashed-two dotted line in FIG. 3 (A) shows the boundary line of the said curved surface 34 of the said main output surface 31 and another surface (plane).

(Description of auxiliary emission surface 35)
The auxiliary emission surface 35 faces the lamp lens 6 in the same manner as the main emission surface 31. The auxiliary emission surface 35 is configured to emit light (incident light) incident from the incident surface 30 into the light guide member 3 to the outside as the emitted light. As shown in FIG. 3B, the auxiliary emission surface 35 is provided on the curved surface 34 so as to be perpendicular or almost perpendicular to the tangent line T at an arbitrary point P in the light guide direction Q. That is, the convex portion 36 is integrally provided on the curved surface 34 in parallel or substantially in parallel with the tangent T direction at an arbitrary point P in the light guide direction Q. The auxiliary emission surface 35 is provided on the end surface of the convex portion 36 perpendicularly or substantially perpendicularly to the tangential T direction at any point P in the light guide direction Q.

  In this example, the auxiliary emission surface 35 forms a flat or substantially flat control surface. As a result, the auxiliary emitting surface 35 converts the light (incident light) incident on the light guide member 3 from the incident surface 30 into emitted light that is parallel or substantially parallel to the light guide direction Q. The light is emitted from the inside to the outside.

  The auxiliary exit surface 35 and the entrance surface 30 are parallel or substantially parallel. For this purpose, the center of the light emitting part 20 of the semiconductor-type light source 2 is located on the perpendicular line of the auxiliary emission surface 35 or an extension of the tangent line T which is substantially perpendicular.

(Description of the lamp lens 6)
The design surface of the lamp lens 6 is directed from the rear side B to the front side F of the vehicle along the design surface of the front part of the vehicle, from the upper side U to the lower side D and from the outer side O to the inner side I of the vehicle. Is inclined. As shown in FIG. 5, the lamp lens 6 includes a light control unit 60 that controls light emitted from the auxiliary emission surface 35 at a portion of the lamp lens 6 that faces the auxiliary emission surface 35. Is provided. The light control unit 60 diffuses emitted light that is parallel or substantially parallel to the light guide direction Q emitted from the auxiliary emitting surface 35 and emits the emitted light to the outside (in front of the vehicle). In this example, the light control unit 60 includes one or a plurality of diffusion prisms (fisheye prisms).

(Description of inner panel 7)
The inner panel 7 is attached to the lamp housing directly or via another member (not shown). The inner panel 7 covers a part of the semiconductor-type light source 2 and the light guide member 3, that is, one end portion on the incident surface 30 side when viewed from the lamp lens 6.

  The inner panel 7 is provided with an insertion hole 70 through which one end of the light guide member 3 on the incident surface 30 side is inserted. A recess is provided in the inner panel 7 where the light guide member 3 is located. By applying metal coating such as aluminum or silver or metal vapor deposition on the surface of the inner panel 7 (front F surface of the vehicle), the concave portion reflects the light from the light guide member 3 toward the lamp lens 6 side. The reflecting surface 71 can be used.

(Description of the operation of the embodiment)
The light guide member 3 and the vehicle lamp 1 according to this 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 that has entered 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. Here, on the curved surface 34 at one end of the light guide member 3 on the incident surface 30 side, most of the incident light is totally reflected and guided through the light guide member 3 from one end to the other.

  Most of the incident light guided from one end to the other end in the light guide member 3 is reflected by the reflecting surface 32 to the main exit surface 31 side as reflected light. Most of the reflected light passes through the lamp lens 6 from the main exit surface 31 as emitted light and is emitted outside, that is, in front of the vehicle. As a result, the main emission surface 31 of the light guide member 3 in the line shape (line shape of L shape in front view in FIG. 1 and line shape in L shape in side view (right side view) in FIG. 2) emits light. .

  Further, the light emitted from the center of the light emitting unit 20 or substantially from the center enters the light guide member 3 from the center or substantially center of the incident surface 30 of the light guide member 3. As shown in FIGS. 3 (A), 4 (A), and 5, the incident light passes through the light guide member 3 parallel to or substantially parallel to the tangential T direction from the incident surface 30 to the auxiliary emission surface 35 side. Led to. The guided light is emitted from the auxiliary emission surface 35 as emitted light to the lamp lens 6 side in parallel or substantially parallel to the tangential T direction. The emitted light passes through the light control unit 60 of the lamp lens 6 and is diffused, and is emitted to the outside, that is, in front of the vehicle.

  Here, strong light emitted from the center of the light emitting unit 20 or substantially from the center is emitted from the auxiliary emission surface 35 to the front of the vehicle in parallel or substantially parallel to the tangential T direction. Can be secured. In addition, since the strong light emitted from the auxiliary emission surface 35 is diffused by the light control unit 60 of the lamp lens 6, visibility is improved.

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

  In the light guide member 3 and the vehicle lamp 1 according to this embodiment, the auxiliary emission surface 35 is perpendicular to or substantially perpendicular to the tangent line T at an arbitrary point P in the light guide direction Q. Therefore, there is no space between the curved surface 34 of the main exit surface 31 and the auxiliary exit surface 35. For this reason, the mold structure for molding the light guide member 3 having the curved surface 34 of the main emission surface 31 and the auxiliary emission surface 35 with a resin is simpler than the conventional one. Thereby, manufacturability improves and manufacturing cost can be reduced.

  That is, in the light guide member 3 and the vehicle lamp 1 according to this embodiment, the convex portion 36 is integrally provided on the curved surface 34 in parallel or substantially parallel to the tangent T direction at an arbitrary point P in the light guide direction Q. The auxiliary emission surface 35 is provided on the end face of the convex portion 36 perpendicularly or substantially perpendicularly to the tangential T direction at an arbitrary point P in the light guide direction Q. For this purpose, the curved surface 34 is integrally provided with a convex portion 36 having an auxiliary emission surface 35 on the end surface in parallel or substantially parallel to the tangential T direction. There is no space between them. As a result, there is no space between the curved surface 34 and the auxiliary emission surface 35.

  Here, when the inclination of the curved surface 34 of the main exit surface 31 is large (strong), most of the incident light incident on the light guide member 3 is totally reflected by the curved surface 34, and is thus emitted from the curved surface 34. There is almost no light. For this reason, only the light emitted from the main exit surface 31 other than the curved surface 34 is emitted from the lamp lens 6 to the front of the external vehicle. (Light) is difficult to obtain.

  On the other hand, the light guide member 3 and the vehicular lamp 1 according to this embodiment are provided with the auxiliary emission surface 35 on the curved surface 34 of the main emission surface 31. For this reason, even when the inclination of the curved surface 34 of the main exit surface 31 is large (when strong), a part of the incident light entering the light guide member 3 is guided from the auxiliary exit surface 35 in the light guide direction Q. The light is emitted in parallel or substantially parallel to the tangent T direction at an arbitrary point P. Further, by making the auxiliary emission surface 35 of the curved surface 34 face the lamp lens 6, light emitted from the auxiliary emission surface 35 of the curved surface 34 can also be emitted from the lamp lens 6 to the front of the external vehicle. Therefore, predetermined emission light (target emission light) is obtained from the lamp lens 6.

  In particular, the light guide member 3 and the vehicular lamp 1 according to this embodiment are such that the center or almost the center of the light emitting unit 20 of the semiconductor light source 2 is located on an extension of the tangent line T. For this reason, strong light emitted from the center of the light emitting unit 20 or substantially from the center is emitted from the auxiliary emitting surface 35 to the front of the vehicle in parallel or substantially parallel to the tangential T direction. Can be secured. In addition, since the strong light emitted from the auxiliary emission surface 35 is diffused by the light control unit 60 of the lamp lens 6, the visibility of the vehicular lamp 1 is improved. In addition, since strong light radiated from the center of the light emitting unit 20 or almost from the center is used (used), it is not necessary to make the light control unit 60 of the lamp lens 6 larger than necessary. As a result, the light control unit 60 of the lamp lens 6 can be downsized or eliminated, so that the design surface of the lamp lens 6 (design surface of the front portion of the vehicle) is not impaired.

  In the light guide member 3 and the vehicle lamp 1 according to this embodiment, the auxiliary emission surface 35 forms a flat or substantially flat control surface. As a result, light (incident light) incident on the light guide member 3 from the incident surface 30 can be emitted to the outside as emitted light parallel to or substantially parallel to the light guide direction Q from the auxiliary light emitting surface 35.

  In the light guide member 3 and the vehicle lamp 1 according to this embodiment, the light composed of one or a plurality of diffusion prisms (fish-eye prisms) in the portion of the lamp lens 6 facing the auxiliary emission surface 35. A control unit 60 is provided. For this reason, the emitted light parallel to or substantially parallel to the light guide direction Q emitted from the auxiliary emitting surface 35 can be diffused from the light control unit 60 of the lamp lens 6 and emitted to the outside (in front of the vehicle). .

(Description of modified examples of auxiliary emission surfaces 350 and 351)
Hereinafter, modified examples of the auxiliary emission surfaces 350 and 351 will be described with reference to FIGS.

  The auxiliary exit surface 350 of the first modification shown in FIG. 4B forms a control surface that is a convex surface (such as a spherical convex surface or a curved convex surface) that protrudes outward. As a result, light (incident light) incident on the light guide member 3 from the incident surface 30 can be emitted to the outside as cross-diffused outgoing light from the auxiliary outgoing surface 350.

  The auxiliary emission surface 351 of Modification 2 shown in FIG. 4C forms a control surface that is a concave surface (such as a spherical concave surface or a curved concave surface) that is recessed inward. As a result, the light (incident light) incident on the light guide member 3 from the incident surface 30 can be emitted to the outside from the auxiliary emission surface 351 as the outgoing diffused light.

(Description of Modified Examples of Light Control Units 61 and 62)
Hereinafter, modified examples of the light control units 61 and 62 will be described with reference to FIGS.

  The light control unit 61 according to the first modification shown in FIG. 6 is provided integrally with the lamp lens 6 so as to protrude from the front side F of the vehicle at a portion where the auxiliary emission surface 35 faces. The light control unit 61 has a cross-sectional chevron shape (a round shape) having an inclined surface on the outer side O and an inclined surface on the inner side I of the vehicle. The light control unit 61 totally reflects the emitted light emitted from the auxiliary emitting surface 35 in parallel or substantially parallel to the light guide direction Q on the inclined surface of the outer side O of the vehicle, and the totally reflected light is reflected on the vehicle. The light can be emitted to the inner side I from the inclined surface of the inner side I.

  The light control unit 62 of Modification 2 shown in FIG. 7 is integrally provided at the portion of the lamp lens 6 facing the auxiliary emission surface 35 so as to protrude toward the front side F of the vehicle. The light control unit 62 has a cross-sectional chevron shape (a round shape) having an inclined surface on the outer side O and an inclined surface on the inner side I of the vehicle. The light control unit 62 totally reflects the emitted light parallel to or substantially parallel to the light guide direction Q emitted from the auxiliary emitting surface 35 on the inclined surface on the inner side I of the vehicle, and the totally reflected light is reflected on the vehicle. The light can be emitted to the outer side O from the inclined surface of the outer side O.

(Description of examples other than embodiment and modification)
In addition, in the said embodiment and modification, the clearance lamp and turn signal lamp of a front combination lamp are demonstrated. However, in the present invention, vehicle lamps other than the clearance lamp and turn signal lamp of the front combination lamp, for example, the daytime running lamp of the front combination lamp, the turn signal lamp of the rear combination lamp, the clearance lamp, the tail lamp, the stop lamp, etc. It can also be applied to.

  Moreover, in the said embodiment and modification, the light guide member 3 makes | forms the cross-sectional circular column shape. 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 and modification, the diameter of the light guide member 3 is about 6-8 mm, and the width | variety of the reflective surface 32 is about 2 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 said embodiment and modification, the light guide member 3 makes | forms a front view and a side view L-shape. However, in the present invention, the shape of the light guide member is not particularly limited.

  Furthermore, in the above-described embodiment and modification, the vertical portion 3V of the light guide member 3 is disposed along the side of the outer side O (right side R) of the vehicle, and the horizontal portion 3H of the light guide member 3 is lowered. The light guide member 3 is disposed along the side of the side D and is inclined from the upper side U of the vehicle toward the lower side D toward the front side F from the rear side B of the vehicle in a side view (right side view). It is what is arranged. However, in the present invention, the arrangement of the light guide members is not particularly limited.

  Furthermore, in the embodiment and the modification described above, no inner lens is provided in the lamp chamber 8. However, in the present invention, an inner lens may be disposed between the lamp lens 6 in the lamp chamber 8 and the light guide member 3. In this case, the auxiliary emission surfaces 35, 350, and 351 of the light guide member 3 are opposed to the inner lens.

  Furthermore, in the said embodiment and modification, the control surface of a plane, a convex surface, and a concave surface is used for the auxiliary | assistant output surface 35,350,351. However, in the present invention, the shape of the control surface of the auxiliary emission surface is not particularly limited.

  Furthermore, in the above-described embodiments and modifications, the light control units 60, 61, 62 are provided with one or a plurality of diffusion prisms (fisheye prisms), an inclined surface on the outside O and an inclined surface on the inside I of the vehicle. And having a cross-sectional chevron shape having a cross-sectional shape (a U-shape). However, in the present invention, the shape of the light control unit is not particularly limited.

  Furthermore, in FIGS. 6 and 7 described above, the plane auxiliary emission surface 35 shown in FIG. 4A is used. However, in the present invention, the convex auxiliary emission surface 350 shown in FIG. 4B may be used, or the concave auxiliary emission surface 351 shown in FIG. 4C may be used.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Semiconductor type light source 20 Light emission part 21 Board | substrate 3 Light guide member 3V Vertical part 3H Horizontal part 30 Incident surface 31 Main output surface 32 Reflective surface 33 Other end surface 34 Curved surface 35, 350, 351 Auxiliary output surface 36 Convex part 4 Headlamp for low beam 5 Headlamp for high beam 6 Lamp lens 60, 61, 62 Light control unit 7 Inner panel 70 Insertion hole 71 Reflecting surface 8 Lamp chamber F Front side B Rear side U Upper side D Lower side L Left side (vehicle inside)
R right side (vehicle outside)
I Inner O Outer P Point Q Light guide direction T Tangent

Claims (4)

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;
A main exit surface for emitting incident light;
With
The main exit surface is provided with a curved surface,
On the curved surface, an auxiliary emission surface for emitting incident light is provided perpendicularly or substantially perpendicular to a tangent at an arbitrary point in the light guide direction.
The light guide member for vehicles characterized by the above-mentioned. The auxiliary emission surface forms a control surface for controlling incident light.
The light guide member for a vehicle according to claim 1. 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 claim 1 or 2,
With
The auxiliary emission surface faces the lamp lens, or an inner lens disposed between the lamp lens and the vehicle light guide member,
A vehicular lamp characterized by the above. The lamp lens or the inner lens is provided with a light control unit that controls light emitted from the auxiliary emission surface.
The vehicular lamp according to claim 3.

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