JP2016197575A - Vehicle transparent material and vehicle lamp fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that it is difficult for a transparent material to emit light from an entire surface thereof in a substantially uniform manner.SOLUTION: The invention includes a first transparent material 91 and a second transparent material 92. The first transparent material 91 and second transparent material 92 are integrally connected with each other along a longitudinal direction of the first transparent material 91 and a longitudinal direction of the second transparent material 92. A slit 94 is provided along a longitudinal direction at one portion of a connection part between the first transparent material 91 and the second transparent material 92. As a result, this invention enables a transparent material 9 to emit light from an entire surface thereof in a substantially uniform manner.SELECTED DRAWING: Figure 2

Description

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

  Conventionally, a vehicular light guide and a vehicular lamp provided with a vehicular light guide have been conventionally used (for example, Patent Document 1 and Patent Document 2). Hereinafter, the conventional vehicle lamp of Patent Documents 1 and 2 will be described.

  The conventional vehicle lamp of Patent Document 1 includes a light source and a light guide. The light guide includes a rod-shaped member and a curtain member. The light source is disposed in the vicinity of the end face of the rod-shaped member. Light from the light source enters the rod-shaped member from the end face of the rod-shaped member and is emitted to the curtain member side while being guided through the rod-shaped member. The light emitted to the curtain member side is emitted from the front surface of the curtain member to the outside while being guided inside the curtain member. Thereby, the front surface of the curtain member emits light.

  The conventional vehicular lamp of Patent Document 2 includes a transparent optical member and a light source. The optical member includes a cylindrical region and a plate. The light source is positioned at one end of the cylindrical region. Light from the light source is incident on the cylindrical region and propagates in the plate while continuously reflecting in the cylindrical region. Light transmitted into the plate is scattered from the scattering center to the outside of the plate. As a result, the plate emits light.

JP 2014-41787 A Special table 2013-513912 gazette

  However, the light guide in the conventional vehicular lamp of Patent Document 1 is a rod-shaped member and a curtain member that are integrally connected along the longitudinal direction. For this reason, most of the light incident on the rod-shaped member is emitted to the light source side portion of the curtain member, and the light emitted to the portion of the curtain member opposite to the light source tends to decrease. As a result, it is difficult to make the front surface of the curtain member emit light substantially uniformly over the entire surface.

  Moreover, the optical member in the conventional vehicle lamp of patent document 2 is a cylindrical area | region and a plate integrally connected along the longitudinal direction. For this reason, most of the light incident on the cylindrical region is transmitted to the light source side portion of the plate, and the light transmitted to the portion of the plate opposite to the light source tends to decrease. As a result, it is difficult to cause the plate to emit light substantially uniformly over the entire surface.

  The problem to be solved by the present invention is that it is difficult for a conventional light guide or optical member of a vehicle lamp to emit light almost uniformly over the entire surface of a curtain member or a plate.

  The present invention (the invention according to claim 1) is a vehicle light guide that guides light using total internal reflection, and includes a first light guide part and a second light guide part. The light guide unit and the second light guide unit are integrally connected to each other along the longitudinal direction of the first light guide unit and the longitudinal direction of the second light guide unit. A slit is provided along a longitudinal direction in a part of the connection part between the light guide part.

  According to this invention (the invention according to claim 2), in the first light guide portion and the second light guide portion, the longitudinal direction of the first light guide portion and the longitudinal direction of the second light guide portion are in the direction of the radius of curvature. A bent portion that is bent so as to maintain an internal and external relative positional relationship is provided, and a slit is provided in the bent portion.

  In this invention (the invention according to claim 3), the connecting surface connecting the first light guide part and the second light guide part of the slit is inclined along the direction in which the light travels with respect to the longitudinal direction. And

  The present invention (the invention according to claim 4) is characterized in that the first light guide section has a bar shape and the second light guide section has a plate shape.

  This invention (invention according to claim 5) is at least one of the first light guide part or the second light guide part, and at least one of the end parts is provided with a light source from the light source. An incident surface on which light is incident is provided, and a slit is provided on an end side of the first light guide unit and the second light guide unit on which the incident surface is provided. .

  The present invention (invention according to claim 6) is the lamp housing and lamp lens defining the lamp chamber, the light source disposed in the lamp chamber, and the light from the light source is incident. The vehicle light guide according to Item 1 is provided.

  In the vehicle light guide and the vehicle lamp according to the present invention, a slit is provided along a longitudinal direction in a part of the connection portion between the first light guide portion and the second light guide portion. For this reason, it is suppressed by the slit that light entering the first light guide part (or the second light guide part) passes through a part of the second light guide part (or the first light guide part). Can do. As a result, it is possible to suppress a decrease in light passing through the other part of the second light guide part (or the first light guide part). Thereby, the second light guide part (or the first light guide part) can emit light substantially uniformly over the entire surface.

FIG. 1 is a front view showing an embodiment of a vehicle light guide and a vehicle lamp according to the present invention. FIG. 2 is an explanatory diagram showing an optical path from one light source at one end of the light guide for a vehicle. FIG. 3 is an explanatory diagram showing an optical path from one light source and the other light source at one end of the vehicle light guide. 4 is a cross-sectional explanatory view showing an optical path from one light source at one end portion of the light guide for a vehicle (a cross-sectional explanatory view taken along the line IVA-IVA in FIG. 2A, and IVB-IVB in FIG. 2B). FIG. FIG. 5 is a cross-sectional explanatory view showing the optical path from the other light source at one end of the vehicle light guide (VA-VA line cross-sectional explanatory view in FIG. 3A, VB-VB in FIG. 3B) FIG. FIG. 6 is a front view showing the vehicle light guide. FIG. 7 is a plan view (viewed in the direction of arrow VII in FIG. 6) showing the vehicle light guide. FIG. 8 is a side view showing the vehicle light guide (viewed along arrow VIII in FIG. 6). FIG. 9 is a cross-sectional explanatory view (cross-sectional explanatory view taken along the line IX-IX in FIG. 6) showing emitted light from two first light guide portions and one second light guide portion of the vehicle light guide. . FIG. 10 is a cross-sectional explanatory diagram (an X-X cross-sectional explanatory diagram in FIG. 6) showing light emitted from the first light guide portion of the light guide for a vehicle and an optical path in the first light guide portion. FIG. 11 is a partially enlarged plan view (an enlarged plan view of the XI portion in FIG. 7) showing one end portion of the vehicle light guide. FIG. 12 is a partially enlarged side view (an enlarged side view of the XII portion in FIG. 8) showing one end portion of the vehicle light guide. FIG. 13 is a partially enlarged cross-sectional view (XIII-XIII line enlarged cross-sectional view in FIG. 1) showing one end portion of the vehicle light guide and a part of the vehicle lamp. FIG. 14 is a partially enlarged cross-sectional view (an XIV-XIV line enlarged cross-sectional view in FIG. 1) showing the other end portion of the vehicle light guide and a part of the vehicle lamp.

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

  1 and 6 to 8, the symbol “O” indicates the outside of the vehicle. The symbol “I” indicates the inside of the vehicle. The symbol “U” indicates the upper side of the vehicle when the front side F is viewed from the driver side. The symbol “D” indicates the lower side of the vehicle when the front side F is viewed from the driver side. 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. 9 and 10, the hatching of the light guide is omitted.

(Description of Configuration of Embodiment)
Hereinafter, the configuration of the vehicle light guide 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 of a front combination lamp such as a vehicle headlamp or a headlamp.

(Description of vehicle lamp 1)
The vehicular lamp 1 is mounted on both the left and right sides of the front portion of a vehicle (not shown). The design surface of the front portion of the vehicle is along the front-rear direction 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 (outside O It is inclined toward the inner side I). As a result, the design surfaces on the left and right sides of the front portion of the vehicle are formed from three-dimensional curved surfaces.

  In the right vehicle lamp 1 mounted on the right side of the vehicle, the outside O of the vehicle is the right side and the inside I of the vehicle is the left side. On the other hand, in the left vehicle lamp mounted on the left side of the vehicle, the outside O of the vehicle is the left side and the inside I of the vehicle is the right side.

  Hereinafter, the right vehicle lamp 1 mounted on the right side of the vehicle will be described. Note that the left-hand vehicular lamp mounted on the left side of the vehicle is substantially the same as the right-hand vehicular lamp 1 in the left-right direction, and the description thereof is omitted.

  As shown in FIG. 1, the vehicular lamp 1 includes a lamp housing 2, a lamp lens (for example, a transparent outer cover, an outer lens, etc.) 3, an inner lens 4, an inner panel (inner housing) 5, The head lamp unit 6, the turn signal lamp unit 7, light sources 80 and 81, and a light guide 9 as a vehicle light guide according to this embodiment are provided. The light sources 80 and 81 and the light guide 9 constitute a clearance lamp unit.

(Description of the lamp housing 2 and the lamp lens 3)
The lamp housing 2 is composed of a light impermeable member. The lamp housing 2 has a shape in which an outer side O, a front side F, and an upper side U of the vehicle are opened, while an inner side I, a rear side B, and a lower side D of the vehicle are closed.

  The lamp lens 3 is composed of a light transmissive member. The lamp lens 3 has a shape in which the inner side I, the rear side B, and the lower side D of the vehicle are open, while the outer side O, the front side F, and the upper side U of the vehicle are closed. The design surface of the closed portion of the lamp lens 3 extends along the design surface of the front part of the vehicle from the rear side B to the front side F of the vehicle, from the upper side U to the lower side D and the outer side O of the vehicle. Inclined towards I. As a result, the design surface of the lamp lens 3 is composed of a three-dimensional curved surface, like the design surfaces on the left and right sides of the front portion of the vehicle.

  The opening edge of the lamp housing 2 and the opening edge of the lamp lens 3 are fixed. Thereby, the lamp chamber 10 is partitioned. In the lamp chamber 10, the inner lens 4, the inner panel 5, the head lamp unit 6, the turn signal lamp unit 7, the light sources 80 and 81, and the light guide 9 are arranged, respectively.

(Description of inner lens 4 and inner panel 5)
The inner lens 4 is composed of a light transmissive member. As shown in FIGS. 13 and 14, the inner lens 4 is disposed between the lamp lens 3 and the light guide 9. The inner lens 4 diffuses and transmits the emitted lights L11, L21, and L31 emitted from the light guide 9 along the optical axis direction Z or substantially along the optical axis direction Z to the lamp lens 3 side. The inner lens 4 is attached to the lamp housing 2 directly or via another member. The optical axis direction Z is parallel or substantially parallel to an axis in the front-rear direction of the vehicle, that is, a number line in the front-rear direction.

  The inner panel 5 is made of a light impermeable member. As shown in FIGS. 13 and 14, the inner panel 5 is disposed between the lamp lens 3 and the light sources 80 and 81 and the end portions of the light guide 9. As a result, the end portions of the light sources 80 and 81 and the light guide 9 are covered with the inner panel 5 when viewed from the lamp lens 3. Although not shown, a part of the head lamp unit 6 and a part of the turn signal lamp unit 7 are also covered with the inner panel 5 as viewed from the lamp lens 3. Further, as shown in FIG. 13, the inner panel 5 is also disposed between the lamp housing 2, the light source 80 and the light guide 9. The inner panel 5 is attached to the lamp housing 2 directly or via another member.

(Description of the headlamp unit 6 and the turn signal lamp unit 7)
The head lamp unit 6 switches between a low beam light distribution pattern (not shown) and a high beam light distribution pattern (not shown) and irradiates the front of the vehicle from the lamp lens 3. The headlamp unit 6 is attached to the lamp housing 2 via an optical axis adjusting mechanism (not shown).

  The turn signal lamp unit 7 emits a predetermined light distribution pattern (not shown) of the turn signal lamp from the lamp lens 3 to the front of the vehicle. The turn signal lamp unit 7 is attached to the lamp housing 2 directly or via another member.

(Description of light sources 80 and 81)
As shown in FIGS. 2, 3, and 11 to 14, the light sources 80 and 81 are self-luminous semiconductor light sources such as LEDs, OELs, or OLEDs in this example. The light sources 80 and 81 are composed of a light emitting unit 82 and a substrate 83. Four light sources 80 and 81 are arranged so that the light emitting part 82 faces the incident surfaces 910 and 911 at both ends of the two first light guide parts 91 of the light guide body 9. There are two light sources 80 and 81 (one of the light sources 80) on the outside O, rear B, and top U of the vehicle in the lamp chamber 10, and the inside of the vehicle in the lamp chamber 10. Two (the other light source 81) are arranged at a position of I, front F, and lower D. The light sources 80 and 81 are attached to the lamp housing 2 directly or via other members.

(Description of the light guide 9)
The light guide 9 is a member that guides light from the light sources 80 and 81 from the incident surfaces 910 and 911 to the output surfaces 912 and 922 by using total internal reflection (internal reflection). In this example, the light guide 9 is made of a transparent resin material such as acrylic resin, PC (polycarbonate), or PMMA (polymethyl methacrylate, methacrylic resin). The light guide 9 is attached to the lamp housing 2 directly or via another member.

  As shown in FIGS. 1 and 6 to 8, the light guide 9 has a three-dimensionally complicated shape along the design surface of the lamp lens 3, which is composed of a three-dimensional curved surface.

  That is, in the front view of FIGS. 1 and 6, the intermediate portion of the light guide 9 is inclined from the outer side O of the vehicle toward the inner side I and from the upper side U of the vehicle toward the lower side D. Similarly, one end portion of the outer side O of the light guide 9 on the vehicle is curved toward the lower side D of the vehicle and twisted in the front-rear direction of the vehicle. Similarly, the other end portion of the inner side I of the light guide 9 is curved toward the outer side O of the vehicle, is curved toward the lower side D of the vehicle, and is twisted in the longitudinal direction of the vehicle. ing.

  In the plan view of FIG. 7, the intermediate portion of the light guide 9 is inclined from the outer side O of the vehicle toward the inner side I and from the rear side B of the vehicle toward the front side F. Similarly, one end portion of the outer side O of the light guide 9 is curved toward the outer side O of the vehicle and twisted in the front-rear direction of the vehicle. Similarly, the other end portion of the light guide 9 on the inner side I of the vehicle is curved so as to be substantially parallel to the intermediate portion of the light guide 9 and is twisted in the front-rear direction of the vehicle.

  In the side view of FIG. 8, the intermediate portion of the light guide 9 is inclined from the rear side B of the vehicle toward the front side F and from the upper side U of the vehicle toward the lower side D. Similarly, one end portion on the rear side B of the light guide 9 is curved toward the lower side D of the vehicle and twisted in the front-rear direction of the vehicle. Similarly, the other end portion of the light guide 9 on the front side F of the vehicle curves toward the rear side B of the vehicle, curves toward the lower side D of the vehicle, and extends in the longitudinal direction of the vehicle. It is twisted.

  The light guide 9 includes two first light guides 91 and one second light guide 92. The two first light guide portions 91 each have an equivalent or substantially equivalent cross-sectional circular shape or substantially circular columnar shape, that is, a round bar shape, from one end to the other end. The diameters of the two first light guides 91 are about 6 to 8 mm in this example. One sheet of the second light guide portion 92 has an equivalent or substantially equivalent cross-sectional rectangular or substantially rectangular plate shape from one end to the other end.

  The first light guide unit 91 and the second light guide unit 92 include a longitudinal direction from the one end to the other end of the first light guide unit 91 (a center line direction of the first light guide unit 91) and the The second light guides 92 are integrally connected to each other along the longitudinal direction (the center line direction of the second light guides 92) from one end to the other end of the second light guides 92. That is, one side surface in the longitudinal direction of the first light guide portion 91 is integrally connected to both side surfaces in the longitudinal direction of the second light guide portion 92.

  Bent portions 93 are provided at both end portions of the light guide 9. That is, as shown in FIGS. 2, 3, 6 to 8, and 11 to 14, the first light guide portion 91 and the second light guide portion 92 have the first light guide portion at both ends. A bent portion 93 is provided so that the longitudinal direction of the portion 91 and the longitudinal direction of the second light guide portion 92 are bent so as to maintain a relative positional relationship between the inside and the outside in the direction of the radius of curvature.

(Description of the first light guide 91)
The first light guide 91 includes the incident surfaces 910 and 911, the emission surface 912, a prism reflection surface 913, and a total reflection surface 914.

  The incident surfaces 910 and 911 are provided on both end surfaces of the first light guide body 91. The incident surfaces 910 and 911 are opposed to the light emitting unit 82 of the light sources 80 and 81. The centers of the incident surfaces 910 and 911 and the center of the light emitting unit 82 are coincident or substantially coincident with each other. The entrance surfaces 910 and 911 are made of a flat surface, a curved surface, or a combination of a flat surface and a curved surface. The incident surfaces 910 and 911 allow the light emitted from the light emitting unit 82 to enter the first light guide unit 91.

  The two incident surfaces 910 on one (one end surface) of the incident surfaces are locations where the two light sources 80 are arranged, that is, outside the vehicle in the lamp chamber 10 and on the rear. It is arranged on the side B and on the upper side U. Of the incident surfaces, the other two (other end surfaces) two incident surfaces 911 are locations where the other two light sources 81 are arranged, that is, the inside I of the vehicle in the lamp chamber 10 and the front side. It is F and is arranged at the location of the lower side D.

  The exit surface 912 is provided on the side surface of the first light guide 91 that faces the lamp lens 3 and the inner lens 4. As shown in FIG. 9, the exit surface 912 is a circular arc surface having a substantially circular cross section. The exit surface 912 is the incident light L10, L20 that has entered the first light guide 91 from the entrance surfaces 910, 911, and the reflected light L12, L22 from the prism reflection surface 913 is the exit light L11, L21 is emitted from the first light guide portion 91 to the outside along the optical axis direction Z or substantially along the optical axis direction Z.

  The prism reflection surface 913 and the total reflection surface 914 are provided on the side surface of the first light guide 91 that is opposite to the emission surface 912. The prism reflection surface 913 and the total reflection surface 914 are alternately arranged from one end to the other end of the first light guide 91, that is, over the entire length of the second light guide 92. Are provided continuously. The prism reflection surface 913 and the total reflection surface 914 are not provided in the both end portions of the first light guide portion 91 and the portions covered with the inner panel 5. In this example, the widths of the prism reflection surface 913 and the total reflection surface 914 are about 2 mm.

  The prism reflecting surface 913 is composed of two surfaces of a V-shaped or almost V-shaped prism. The reflection surface 913 reflects a part of the one incident light L10 from the one light source 80 and a part of the other incident light L20 from the other light source 81 as reflected lights L12 and L22, respectively. The light is reflected toward the emission surface 912 side.

  The total reflection surface 914 transmits a part of the one incident light L10 from the one light source 80 and a part of the other incident light L20 from the other light source 81 to the first light guide. It is totally reflected in the portion 91 and the second light guide portion 92.

(Description of the second light guide 92)
The second light guide 92 includes the emission surface 922 and the reflection surface 923.

  The exit surface 922 is provided on the surface of the second light guide 92 that faces the lamp lens 3 and the inner lens 4. A plurality of diffusing prisms 924 having a triangular cross section are provided on the exit surface 922 along the longitudinal direction. The diffusing prism 924 may be a plurality of arc-shaped prisms formed along the second light guide portion 92 having a circular arc cross section and having a plate shape. The exit surface 922 is the incident light L10 and L20 incident on the first light guide 91 from the incident surfaces 910 and 911 of the first light guide 91, and the reflected light L32 from the reflection surface 923. Is emitted as the emitted light L31 from the second light guide portion 92 to the outside along the optical axis direction Z or substantially along the optical axis direction Z. The diffusion prism 924 diffuses the emitted light L31 emitted from the emission surface 922 to the outside.

  The reflection surface 923 is provided on the surface of the second light guide unit 92 opposite to the emission surface 922. The reflection surface 923 is provided with a diffusing element group (not shown) that diffuses the reflected light L32, such as a texture. The reflection surface 923 is the incident light L10 and L20 incident on the first light guide 91, and the light guided from the first light guide 91 to the second light guide 92. A part is diffusely reflected as the reflected light L32 toward the emission surface 922 side. In addition, the reflection surface 923 transmits a part of the light guided from the first light guide 91 to the second light guide 92 in the first light guide 91 and the second light guide 92. Is diffusely reflected.

(Description of slit 94)
A slit 94 is provided along the longitudinal direction in a part of the connection between the first light guide 91 and the second light guide 92. The slits 94 are provided at the bent portions 93, that is, both end portions of the first light guide portion 91 where the incident surfaces 910 and 911 are provided. A connecting surface 940 that connects the first light guide portion 91 and the second light guide portion 92 of the slit 94 is inclined along the direction in which light (incident light L10, L20) travels with respect to the longitudinal direction. ing. 2A and 3A, a connecting surface 940 is illustrated that is inclined along the direction in which the incident light L20 travels.

  As shown by the solid lines in FIGS. 2A and 3A, the slit 94 includes one of the first light guides 91 on the inner side of the bent portion 93 of the two first light guides 91. It is provided between the light part 91 and the second light guide part 92. The slit 94 is formed between the two first light guide portions 91 and the second light guide portion 92 as shown by the solid line and the two-dot chain line in FIGS. 2 (A) and 3 (A). May be provided respectively.

(Description of the operation of the embodiment)
A light guide 9 that is a vehicle light guide according to this embodiment and a vehicle lamp 1 according to this embodiment (hereinafter referred to as “light guide 9 according to this embodiment, vehicle lamp 1”) are as follows: The configuration as described above will be described below.

  The light emitting portions 82 of the two light sources 80 and the light emitting portions 82 of the other two light sources 81 are turned on. Then, the light radiated from the light emitting part 82 enters the two first light guide parts 91 from one incident surface 910 and the other incident face 911 of the two first light guide parts 91, respectively. Incident light L10 incident on the two first light guides 91 from one incident surface 910 of the two first light guides 91 passes through the two first light guides 91 on one incident surface. The light is guided from the 910 side to the other incident surface 911 side while repeating total reflection. Incident light L20 incident on the two first light guides 91 from the other incident surfaces 911 of the two first light guides 91 passes through the two first light guides 91 on the other incident surface. The light is guided from the 911 side to one incident surface 910 side while repeating total reflection.

  Part of the incident light L10 and L20 in the first light guide 91 is reflected by the prism reflection surface 913 of the first light guide 91. The reflected lights L12 and L22 are emitted from the emission surface 912 of the first light guide unit 91 to the outside as the emitted lights L11 and L21 along the optical axis direction Z or substantially the optical axis direction Z.

  In addition, a part of the incident light L10 and L20 in the first light guide 91 is totally reflected in the first light guide 91 and the second light guide 92 by the total reflection surface 914 of the first light guide 91. reflect. The reflected light (incident light L10, L20) totally reflected in the first light guide 91 is guided in the first light guide 91.

  On the other hand, the reflected light (incident light L <b> 10, L <b> 20) totally reflected in the second light guide unit 92 is guided in the second light guide unit 92. Part of the light (incident light L10, L20) guided from the first light guide 91 into the second light guide 92 is reflected by the reflection surface 923 of the second light guide 92. The reflected light L32 is emitted to the outside from the emission surface 922 of the second light guide 92 as the emitted light L31 along the optical axis direction Z or substantially the optical axis direction Z. A part of the emitted light L31 is diffused by the diffusion prism 924 on the emission surface 922 of the second light guide 92.

  Further, part of the light (incident light L10, L20) guided from the first light guide 91 into the second light guide 92 passes through the first light guide 91 and the second light guide 92. The light is guided from one incident surface 910 side to the other incident surface 911 side and from the other incident surface 911 side to the one incident surface 910 side.

  The emitted lights L11 and L21 emitted to the outside from the emission surface 912 of the first light guide 91 and the emitted light L31 emitted to the outside from the emission surface 922 of the second light guide 92 are transmitted through the inner lens 4. Diffused. The diffused emitted lights L11, L21, and L31 are emitted from the lamp lens 3 to the front of the vehicle in a predetermined light distribution pattern.

(Explanation of effect of embodiment)
The light guide 9 and the vehicular lamp 1 according to this embodiment are configured and operated as described above, and the effects thereof will be described below. In addition, although the effect of the one slit 94 of the light guide 9 is demonstrated, the other slit 94 of the light guide 9 can also achieve the same effect.

  In the light guide body 9 according to this embodiment, a slit 94 is provided along the longitudinal direction in a part of the connection portion between the first light guide portion 91 and the second light guide portion 92 inside the bent portion 93. It has been. For this reason, the light guide 9 and the vehicular lamp 1 according to this embodiment are arranged from the first incident surface 910 of the first light guide portion 91 as shown in FIGS. 2 (A) and 4 (A). It is suppressed by the slit 94 that the light (incident light L10) incident on the first light guide 91 passes through a part of the second light guide 92 (that is, the part on the one incident surface 910 side). it can. As a result, the light (incident light L10) passing through the other part of the second light guide part 92 (that is, the part on the opposite side to the one incident surface 910 side and the part on the other incident surface 911 side) is reduced. Can be suppressed. Thereby, the 2nd light guide part 92 can be light-emitted substantially uniformly over the whole surface.

  Here, an optical path in the light guide 900 in which the slit 94 is not provided will be described with reference to FIGS. 2B and 4B. In the light guide 900, light (incident light L10) incident on the first light guide 91 from one incident surface 910 of the first light guide 91 is a part of the second light guide 92 (that is, one side). The portion on the incident surface 910 side). A part of the light (incident light L10) that has passed through as it is passes through the first light guide portion 91 outside the bent portion 93 to the outside as the loss light L01. Further, a part of the light (incident light L10) that has passed through as it is is a loss light and is a local point light L02, and the first light guide unit 91 and the second light guide unit outside the bent portion 93. It will come out of the connection part with 92 outside.

  On the other hand, as described above, the light guide 9 according to this embodiment has a slit in a part of the connection portion between the first light guide portion 91 and the second light guide portion 92 inside the bent portion 93. 94 is provided along the longitudinal direction. For this reason, the light guide 9 and the vehicular lamp 1 according to this embodiment are arranged from the first incident surface 910 of the first light guide portion 91 as shown in FIGS. 2 (A) and 4 (A). It is suppressed by the slit 94 that the light (incident light L10) incident on the first light guide 91 passes through a part of the second light guide 92 (that is, the part on the one incident surface 910 side). it can. As a result, it is possible to suppress the loss light L01 and the loss light in the light guide 900 that is not provided with the slit 94, and the local point light L02. Accordingly, the amount of light (incident light L10) passing through the other part of the second light guide part 92 (that is, the part on the opposite side to the one incident surface 910 side and the part on the other incident surface 911 side) is reduced. Can be suppressed. Thereby, the 2nd light guide part 92 can be light-emitted substantially uniformly over the whole surface.

  In the light guide 9 according to this embodiment, slits 94 are provided in the bent portions 93 of the first light guide 91 and the second light guide 92. For this reason, the light guide 9 and the vehicular lamp 1 according to this embodiment are configured so that the incident light L10 incident on the first light guide 91 passes through a part of the second light guide 92 through the slit. 94 can be reliably suppressed. That is, when the first light guide 91 and the second light guide 92 have the bent portion 93, the first light guide portion 91 and the second light guide portion 92 have the first portion as compared with the case where the first light guide portion 91 and the second light guide portion 92 do not have the bent portion 93. Incidence light L10 incident on the light guide 91 passes through a part of the second light guide 92 as it is, and the ratio of loss light L01 and loss light to local point light L02 is large. For this reason, providing the slits 94 in the bent portions 93 of the first light guide 91 and the second light guide 92 can suppress the loss light L01 and the loss light and local spot light L02. It is.

  In addition, the light guide 9 according to this embodiment has a slit 94 provided between the first light guide 91 and the second light guide 92 inside the bent portion 93. As a result, the light guide 9 and the vehicular lamp 1 according to this embodiment can more reliably suppress the local point light L02 that is the lost light L01 and the lost light. That is, when the curvatures of the bent portions 93 of the first light guide 91 and the second light guide 92 are large (when the radius of curvature is small), the bent portions 93 of the first light guide 91 and the second light guide 92 are used. Compared with the case where the curvature of the light is small (the curvature radius is large), the ratio of the lost light L01 and the lost light to the local point light L02 is large. For this reason, providing the slit 94 in the first light guide 91 on the inner side which has a larger curvature than the first light guide 91 on the outer side is the loss light L01 and the loss light, and the local point light L02. Can be suppressed.

  In addition, bent portions 93 are provided at both end portions of the light guide 9 according to this embodiment, that is, at both incident surfaces 910 and 911 of the first light guide portion 91. For this reason, the light guide 9 and the vehicle lamp 1 according to this embodiment store both end portions of the light guide 9 and both light sources 80 and 81 in a small space, as shown in FIGS. 13 and 14. be able to. That is, as shown by a two-dot chain line in FIGS. 13 and 14, when both end portions of the light guide 9 form a straight line, the lamp housing 2 is placed behind the both end portions that form the straight line of the light guide 9. It is necessary to spread to the side (the side opposite to the lamp lens 2). As a result, both ends of the light guide 9 forming a straight line and a space for accommodating both light sources 80 and 81 are enlarged. On the other hand, since the light guide 9 and the vehicle lamp 1 according to this embodiment are provided with the bent portions 93 at both end portions of the light guide 9, both end portions of the light guide 9 and both light sources 80 and 81 are provided. The space for storing can be reduced.

  As shown in FIGS. 2A and 3A, the light guide 9 according to this embodiment has a connecting surface 940 that connects the first light guide 91 and the second light guide 92 of the slit 94. It is inclined along the direction in which the incident light L20 travels with respect to the longitudinal direction. For this reason, the light guide 9 and the vehicular lamp 1 according to this embodiment are light from the other light source 81 and the first light guide as shown in FIGS. 3 (A) and 5 (A). Incident light L20 incident from the other incident surface 911 of the part 91 is guided through the first light guide 91 from the other incident surface 911 to the one incident surface 910 side, and from the first light guide 91 to the first light guide 91. 2 Guided into the light guide 92. As a result, the second light guide portion 92 can emit light substantially uniformly from the other incident surface 911 side of the first light guide portion 91 to the one incident surface 910 side.

  Here, an optical path in the light guide body 901 in which the connecting surface 941 of the slit 94 is not inclined will be described with reference to FIGS. 3B and 5B. In this light guide 901, the incident light L20 incident from the other incident surface 911 is guided in the first light guide 91 from the other incident surface 911 to the one incident surface 910 side, and the first guide When guided from the light unit 91 into the second light guide unit 92, the light is reflected by the connecting surface 941 which is not inclined, and is lost to the outside as reflected light L03.

  On the other hand, in the light guide 9 according to this embodiment, the connecting surface 940 of the slit 94 is inclined along the direction in which the incident light L20 travels with respect to the longitudinal direction as described above. Therefore, in the light guide 9 and the vehicle lamp 1 according to this embodiment, as shown in FIGS. 3A and 5A, the incident light L20 incident from the other incident surface 911 is Reflected by the connecting surface 940 when the light guide 91 is guided from the other light incident surface 911 to the one light incident surface 910 and guided from the first light guide 91 to the second light guide 92. Without being guided, the light is guided into the second light guide 92 as it is. As a result, the second light guide portion 92 can emit light substantially uniformly from the other incident surface 911 side of the first light guide portion 91 to the one incident surface 910 side.

  In the light guide 9 according to this embodiment, the two first light guide portions 91 have a bar shape. As a result, the light guide 9 and the vehicular lamp 1 according to this embodiment allow the incident light L10 from one light source 80 to be incident from the one incident surface 910 to the other incident surface 911, and from the other light source 81. Incident light L20 can be efficiently guided from the other incident surface 911 to the one incident surface 910 side. A part of one incident light L10 guided from one incident surface 910 to the other incident surface 911 and one of the other incident light L20 guided from the other incident surface 911 to one incident surface 910 side. The unit emits the emitted lights L11 and L21 from the emission surfaces 912 of the two first light guides 91 to the outside.

  In the light guide 9 according to this embodiment, one second light guide 92 has a plate shape. As a result, the light guide body 9 and the vehicular lamp 1 according to this embodiment are guided from one incident surface 910 to the other incident surface 911 side, and the second one from the two first light guide portions 91. One incident light L10 guided into the light guide 92 and the second light guide from the two first light guides 91 are guided from the other incident surface 911 to the one incident surface 910 side. The other incident light L20 guided into the portion 92 can be emitted to the outside as the emitted light L31 over almost the entire surface. Note that part of the one incident light L10 and the other incident light L20 guided from the two first light guides 91 into the second light guide 92 is first from the second light guide 92. Guided into the light guide 91.

  In the light guide 9 according to this embodiment, incident surfaces 910 and 911 are provided on both end surfaces of the two first light guide portions 91, respectively, and slits 94 are provided on both end portions of the two first light guide portions 91, respectively. It is provided. For this reason, the light guide 9 and the vehicular lamp 1 according to the present embodiment receive light that is close to the strong light incident on the incident surfaces 910 and 911 of the two first light guides 91 from the light sources 80 and 81, respectively. Loss of light L10 and L20 can be suppressed. Thereby, strong incident light L10 and L20 can be used, and the light guide 9 can be made to emit light substantially uniformly over the entire surface.

  The light guide 9 according to this embodiment has a complicatedly long shape in three dimensions along the design surface of the lamp lens 3 constituted by a three-dimensional curved surface. As a result, the light guide 9 and the vehicular lamp 1 according to this embodiment are optimal as a clearance lamp for a front combination lamp.

(Description of example other than embodiment)
In the above embodiment, the clearance lamp of the front combination lamp will be described. However, in the present invention, a vehicle lamp other than the clearance lamp of the front combination lamp, for example, a daytime running lamp of the front combination lamp, a turn signal lamp, a cornering lamp, a fog lamp, a turn signal lamp of the rear combination lamp, a tail lamp, and a stop lamp. It can also be applied to lamps, tail / stop lamps, backup lamps, etc.

  Moreover, in the said embodiment, the two 1st light guide parts 91 of the light guide 9 make a cylindrical shape with a circular cross section. However, in this invention, the 1st light guide part 91 of the light guide 9 may be columnar shapes, such as a cross-sectional triangle, a cross-sectional square, and a cross-sectional polygon.

  Furthermore, in the above-described embodiment, the diameter of the first light guide portion 91 of the light guide 9 is about 6 to 8 mm, and the widths of the prism reflection surface 913 and the total reflection surface 914 are about 2 mm. However, in the present invention, the dimension of the diameter of the first light guide portion 91 of the light guide 9 and the dimensions of the widths of the prism reflection surface 913 and the total reflection surface 914 are not particularly limited.

  Furthermore, in the above-described embodiment, the light guide 9 has a three-dimensionally complicated shape along the design surface of the lamp lens 3 constituted by a three-dimensional curved surface. However, in the present invention, the shape of the light guide 9 is not particularly limited. For example, the shape of the light guide 9 may be a three-dimensional shape and not along the design surface of the lamp lens 3.

  Furthermore, in the above-described embodiment, the lamp lens 3 is constituted by a plain lens. However, in the present invention, the lamp lens 3 may be provided with a diffusion system prism such as a fish-eye prism.

  Furthermore, in the above-described embodiment, the incident surfaces 910 and 911 are respectively provided on both end surfaces of the two first light guide portions 91, and the light sources 80 and 81 are disposed on the incident surfaces 910 and 911, respectively. It is. However, in the present invention, an incident surface may be provided on one end surface of the first light guide 91 and a light source may be disposed on the incident surface. Moreover, in this invention, an incident surface may be provided in the both end surfaces or one end surface of the 2nd light guide part 92, and a light source may be arrange | positioned in the incident surface.

  Furthermore, in the above-described embodiment, the slits 94 are provided at both end portions of the light guide 9. However, in the present invention, the slit 94 may be provided at one end portion of the light guide 9.

  Furthermore, in the above embodiment, the light guide 9 is composed of two first light guides 91 and one second light guide 92. However, in the present invention, the light guide 9 is composed of one first light guide 91 and one second light guide 92, or one first light guide 91 and 2. One composed of the second light guide part 92, or one composed of three or more first light guide parts 91 and one second light guide part 92, or one first light guide part. 91 and three or more second light guides 92, or two or more first light guides 91 and two or more second light guides 92 may be used.

  Furthermore, in the above-described embodiment, as the light sources 80 and 81, self-luminous semiconductor light sources such as LEDs, OELs, and OLEDs are used. However, in the present invention, the light source may be a bulb light source or a laser device that emits laser light.

  Furthermore, in the above-described embodiment, the outgoing lights L11, L21, and L31 transmitted from the inner lens 4 are diffused by the inner lens 4. However, in the present invention, the outgoing lights L11, L21 and L31 transmitted from the inner lens 4 may be transmitted as they are without being diffused.

  Furthermore, in the above embodiment, the inner lens 4 is used. However, in the present invention, the inner lens 4 need not be used.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Lamp housing 3 Lamp lens 4 Inner lens 5 Inner panel 6 Head lamp unit 7 Turn signal lamp unit 80, 81 Light source 82 Light emission part 83 Substrate 9, 900, 901 Light guide 91 First light guide part 910, 911 entrance surface 912 exit surface 913 prism reflection surface 914 total reflection surface 92 second light guide 922 exit surface 923 reflection surface 924 diffusion prism 93 bent portion 94 slit 940, 941 connecting surface 10 lamp chamber L10, L20 incident light L11, L21 , L31 Emission light L12, L22, L32 Reflected light L01, L02, L03 Lost light O Outer I Inner U Upper D Lower F Front side B Rear side Z Optical axis direction

Claims (6)

In a vehicle light guide that guides light using total internal reflection,
A first light guide and a second light guide;
The first light guide part and the second light guide part are integrally connected to each other along the longitudinal direction of the first light guide part and the longitudinal direction of the second light guide part,
A slit is provided along the longitudinal direction in a part of the connection portion between the first light guide and the second light guide.
A light guide for a vehicle characterized by the above. The first light guide and the second light guide have a relative positional relationship between the longitudinal direction of the first light guide and the longitudinal direction of the second light guide in the direction of the radius of curvature. Bends that are bent to keep,
The slit is provided in the bent portion,
The light guide for vehicles according to claim 1 characterized by things. The connecting surface connecting the first light guide part and the second light guide part of the slit is inclined along the direction in which light travels with respect to the longitudinal direction.
The light guide for vehicles according to claim 1 or 2 characterized by things. The first light guide portion has a bar shape,
The second light guide has a plate shape;
The vehicle light guide according to any one of claims 1 to 3, wherein the light guide is for vehicles. At least one of the first light guide unit and the second light guide unit, and at least one of the end portions is provided with an incident surface on which light from a light source is incident. And
The slit is provided on the end side where the incident surface is provided in the first light guide and the second light guide.
The light guide for vehicles according to claim 1 or 2 characterized by things. A lamp housing and a lamp lens that partition the lamp chamber;
The light guide for vehicles according to any one of claims 1 to 5, wherein light from the light source disposed in the lamp chamber and light from the light source enter.
With
A vehicular lamp characterized by the above.

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