JP6354311B2 - Vehicle lighting - Google Patents

Description

  The present invention is a vehicular lamp that includes a light source and a lens member. For example, the vehicular lamp includes a tail lamp, a stop lamp, a tail / stop lamp, a clearance lamp, a turn signal lamp, a rear fog lamp, and a daytime running lamp. It relates to lighting equipment. In particular, the present invention relates to a vehicular lamp having a main light emitting portion (main light emitting surface, main emitting surface) and a sub light emitting portion (sub light emitting surface, sub outgoing surface).

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). Hereinafter, a conventional vehicle lamp will be described. A conventional vehicular lamp includes an LED and a light guide, and the light guide has an incident portion, a central exit surface, an end exit surface, and a branch reflection surface. Light from the LED enters the light guide from the incident part, a part of the incident light exits from the central exit surface, and the remainder of the incident light branches off and reflects off the branch reflecting surface and exits from the end exit surface. To do. Thus, the central emission surface emits light as the central light emission surface, and the end emission surface emits light as a line-shaped end emission surface.

JP 2013-37926 A

  However, since the conventional vehicular lamp is provided with a branch reflection surface in the middle of the end emission surface, when the remainder of the incident light is branched and reflected by the branch reflection surface, it is emitted from the end emission surface. Light is not emitted from the middle corresponding to the branch reflection surface among the partial emission surfaces. For this reason, a dark part (dark part) may be formed in the middle of the line-shaped end light emitting surface.

  The problem to be solved by the present invention is that a dark portion may be formed in the middle of a line-shaped end light emitting surface in a conventional vehicular lamp.

The inventions includes a light source, the lens and the member, the lens member includes a main light emitting portion, from the sub-emission portion, and a main light emitting portion and the light guide portion provided between the sub-light emitting portion, The main light emitting unit is configured to have an incident surface that allows light from the light source to enter the main light emitting unit, a main reflecting surface that reflects a portion of incident light that has entered the main light emitting unit from the incident surface, A main light emitting surface for emitting part of the main reflected light reflected by the reflecting surface, and a light guide part reflecting surface for reflecting a part of the main reflected light into the light guide part. possess the secondary reflecting surface for reflecting the light guide portion reflected light transmitted through the light guide portion is reflected by the light unit reflecting surface, and the secondary emission surface for emitting the secondary light reflected by the secondary reflecting surface, the light source Are arranged, a plurality of main light emitting portions corresponding to the plurality of light sources, respectively, and arranged at intervals, and the light guide portion reflecting surface, A first light guide part reflecting surface facing the light emitting part and reflecting a part of the main reflected light to the sub-reflecting surface side as first light guide part reflected light, and a main reflection reflecting the adjacent main light emitting part. A second light guide part reflecting surface that reflects a part of the light as the second light guide part reflected light to the adjacent main light emitting part side, and in the part between the adjacent main light emitting parts in the light guide part A third light guide part reflecting surface that reflects the second light guide part reflected light reflected by the second light guide part reflecting surface and transmitted through the light guide part to the sub reflecting surface side as third light guide part reflected light. It is provided, It is characterized by the above-mentioned.

The inventions, the light source is, it is plural arranged, the main light emitting portion, in correspondence to the plurality of light sources, and have been several spaced, light guide part reflection surfaces, A first light guide part reflecting surface that faces the sub light emitting part and reflects a part of the main reflected light to the sub reflecting surface side as the first light guide part reflected light, and a main light emitting part that is adjacent to the first light guide part reflecting surface. A second light guide part reflecting surface for reflecting a part of the reflected light as the second light guide part reflected light to the adjacent main light emitting part side, and between the adjacent main light emitting parts in the light guide part The third light guide part reflecting surface that reflects the second light guide part reflected light reflected by the second light guide part reflecting surface and transmitted through the light guide part as the third light guide part reflected light to the sub reflecting surface side. Is provided.

The inventions in the range to reflect the first light guiding unit reflecting surface of the first light guide portion reflected light to the sub-reflecting surface side, of the outermost edge of the main light-emitting portion faces the main light emitting portion adjacent to both sides It is characterized in that the range is between two perpendicular lines respectively extending from two locations on the outermost edge on the side to the sub-light emitting part.

  Since the vehicular lamp according to the present invention does not have a branched reflection surface like the conventional vehicular lamp, light from the light source enters the main light emitting portion from the incident surface, and a part of the incident light is mainly reflected. The main reflected light is reflected from the surface, a part of the main reflected light is emitted from the main emitting surface, and a part of the main reflected light is reflected by the light guiding unit reflecting surface into the light guiding unit. The light is reflected by the sub-reflection surface, and the sub-reflection light is emitted from the sub-emission surface. As a result, the main light emitting surface emits light as the main light emitting surface, and the sub light emitting surface emits light as the sub light emitting surface. As described above, the vehicular lamp of the present invention does not have a branch reflection surface unlike the conventional vehicular lamp, and therefore, a dark portion is not particularly formed on the sub-light emitting surface.

FIG. 1 is a front view showing a first embodiment of a vehicular lamp according to the present invention (a front view without a lamp lens). FIG. 2 is an enlarged front view (an enlarged front view of a portion II in FIG. 1) showing a part of the lens member. FIG. 3 is an enlarged longitudinal sectional view (an enlarged sectional view taken along line III-III in FIG. 2) showing the light source and the lens member. FIG. 4 is an enlarged vertical cross-sectional view (III-III line enlarged cross-sectional view in FIG. 2) showing an optical path in the lens member. FIG. 5 is an enlarged longitudinal sectional view (an enlarged sectional view taken along line VV in FIG. 2) showing the light source and the lens member. FIG. 6 is an enlarged longitudinal sectional view (an enlarged sectional view taken along line VV in FIG. 2) showing an optical path in the lens member. FIG. 7 is an enlarged longitudinal sectional view (an enlarged sectional view taken along line VII-VII in FIG. 2) showing the light source and the lens member. FIG. 8 is an enlarged longitudinal sectional view (an enlarged sectional view taken along line VII-VII in FIG. 2) showing an optical path in the lens member. FIG. 9 is an enlarged longitudinal sectional view (an enlarged sectional view taken along line IX-IX in FIG. 2) showing an optical path in the lens member. FIG. 10 is an explanatory diagram of light emission states of the main light emitting surface and the sub light emitting surface, showing Embodiment 2 of the vehicular lamp according to the present invention. FIG. 11 is an explanatory diagram of the light emission states of the main light emitting surface and the sub light emitting surface, showing Embodiment 3 of the vehicular lamp according to the present invention. FIG. 12 is an explanatory diagram of the light emission state of the main light emitting surface and the sub light emitting surface, showing Embodiment 4 of the vehicular lamp according to the present invention.

  Hereinafter, four embodiments (examples) of a vehicular 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.

(Description of Configuration of Embodiment 1)
1 to 9 show Embodiment 1 of a vehicular lamp according to the present invention. 2 is an enlarged view of the II portion in FIG. 1, and shows the right side of the II portion in FIG. 1 on the upper side and the left side of the II portion in FIG. 1 on the lower side. In FIG. 3 to FIG. 9, the hatching indicating the cross section of the semiconductor light source and the lens member is omitted.

(Description of vehicle lamp 1)
Hereinafter, the configuration of the vehicular lamp 1 according to the first embodiment will be described. As shown in FIG. 1, the vehicular lamp 1 according to the first embodiment includes a lamp housing 2 and a lamp lens (not shown) that define a lamp chamber 20, and a semiconductor as a light source disposed in the lamp chamber 20. The mold light source 3 and the lens member 4 are provided.

  In this example, the semiconductor light source 3 and the lens member 4 constitute a lamp unit 5 of a tail lamp. The lamp unit 5 of the tail lamp of the semiconductor light source 3 and the lens member 4 is disposed in the lamp chamber 20. The lamp unit 5 of the semiconductor-type light source 3 and the tail lamp of the lens member 4 constitutes a rear combination lamp together with a lamp unit (not shown) having other functions. The rear combination lamps are mounted on both the left and right sides of the rear portion of the vehicle (not shown).

(Description of the semiconductor-type light source 3)
In this example, the semiconductor light source 3 is a self-luminous semiconductor light source such as an LED, an OEL, or an OLED (organic EL). The semiconductor light source 3 has a package structure in which a light emitting chip (LED chip) is sealed with a sealing resin member. In this example, the semiconductor light sources 3 are arranged on four straight lines. 3 to 8, only one semiconductor-type light source 3 is shown.

  As shown in FIGS. 3 to 8, the semiconductor light source 3 includes a light emitting unit 30 having the light emitting chip and a substrate 31 on which the light emitting unit 30 is mounted. The substrate 31 is attached to the lamp housing 2 via an attachment member or the like (not shown). The semiconductor light source 3 is supplied with power through the substrate 31. 4, 6, and 8, the light from the light emitting unit 30 of the semiconductor light source 3 (see solid line arrows in FIGS. 4, 6, and 8) is substantially hemispherical at a wide angle (see above). The solid angle with the center O of the light emitting unit 30 as a point (the apex of the corner) is emitted to about 180 °. The optical axis Z of the semiconductor light source 3 passes through the center O of the light emitting unit 30 and is perpendicular or substantially perpendicular to the light emitting surface of the light emitting unit 30.

(Description of lens member 4)
The lens member 4 includes a main light emitting unit 6, a sub light emitting unit 7, and a light guide unit 8. As shown in FIGS. 1 and 2, the lens member 4 has a rectangular shape in a front view (a shape when the front side of the vehicle is viewed from the rear side of the vehicle).

  In this example, the lens member 4 is made of a transparent resin material such as PC (polycarbonate) or PMMA (polymethyl methacrylate, methacrylic resin). The lens member 4 is attached to the lamp housing 2 via an attachment member or the like (not shown). That is, the semiconductor light source 3 and the lens member 4 are attached to the lamp housing 2 in a state where the relative attachment position is maintained.

(Description of the main light emitting unit 6)
As shown in FIGS. 1 and 2, the main light emitting unit 6 has a circular shape or a substantially circular shape with the optical axis Z as the center when viewed from the front. Further, as shown in FIGS. 3 to 8, the main light emitting portion 6 has a substantially cup-shaped cross section. The main light emitting unit 6 includes a first incident surface 601, a second incident surface 602, a main reflecting surface 600, a first main exit surface 611, a second main exit surface 612, and a third main exit surface 613. The fourth main exit surface 614, the first step surface 621, the second step surface 622, the third step surface 623, the fourth step surface 624, the first light guide reflection surface 631, and the second guide And an optical part reflection surface 632.

  As shown in FIG. 1, the main light emitting units 6 are arranged on four straight lines corresponding to the four semiconductor light sources 3 and at intervals. The three left main light emitting units 6 are arranged at equal intervals. The interval between the three main light emitting units 6 on the left side and the one main light emitting unit 6 on the right side is wider than the interval between the three main light emitting units 6 on the left side.

(Description of the first incident surface 601)
The first incident surface 601 is a central portion of the light emitting unit 30 of the semiconductor-type light source 3 (a central portion having a solid angle of about 70 ° to 80 ° with the center O of the light emitting unit as a point (corner apex)). This is a surface on which light radiated from is refracted and incident as the first incident light L1 that is parallel or substantially parallel. The first incident light L1 is parallel or substantially parallel to the optical axis Z. The first incident surface 601 is provided at the center of the surface (back surface) of the main light emitting unit 6 facing the semiconductor light source 3. That is, the first incident surface 601 is provided corresponding to the central portion of the light emitting unit 30 of the semiconductor light source 3.

  The first incident surface 601 has a hyperbola having a focal point F1 at or near the center O of the light emitting unit 30 of the semiconductor light source 3, and the main axis of the hyperbola (the optical axis Z of the lens member 4) as a rotation axis. It is a refracting surface of a rotating hyperboloid that is rotated.

(Description of the second incident surface 602)
The second incident surface 602 has a solid angle of about 70 ° to 80 ° from the side of the light emitting unit 30 of the semiconductor light source 3 (the center O of the light emitting unit 30 is a point (corner apex)). It is a surface on which the light emitted from the side portion up to ° is refracted and incident as the second incident light L2. The second incident surface 602 is provided on the side of the surface (back surface) of the main light emitting unit 6 that faces the semiconductor light source 3. That is, the second incident surface 602 is provided on the outer peripheral side portion of the first incident surface 601 at the center and corresponding to the side portion of the light emitting unit 30 of the semiconductor-type light source 3.

  The second incident surface 602 is a refracting surface of a rotating surface obtained by rotating a straight line or a curve with the optical axis Z as a rotation axis. The second incident surface 602 is a refracting surface that is inclined at least by a draft angle (not shown) of a molding die (not shown) of the lens member 4 with respect to the optical axis Z direction.

(Description of the first incident light L1 and the second incident light L2)
The first incident light L1 and the second incident light L2 are incident light incident on the main light emitting unit 6 as a whole. Accordingly, the first incident light L1 is a part of the incident light incident on the main light emitting unit 6, and the second incident light L2 is a part of the incident light incident on the main light emitting unit 6. is there.

(Description of main reflection surface 600)
The main reflection surface 600 is a surface that totally reflects the second incident light L2 incident from the second incident surface 602 as main reflected light L3, L4, and L6 that is parallel or substantially parallel to the optical axis Z. The main reflection surface 600 is a rotating paraboloid obtained by rotating a parabola with the focal point F2 at or near the center O of the light emitting unit 30 of the semiconductor light source 3 as the rotation axis.

(Description of the first main exit surface 611, the second main exit surface 612, the third main exit surface 613, and the fourth main exit surface 614)
The first main emission surface 611, the second main emission surface 612, the third main emission surface 613, and the fourth main emission surface 614 are reflected by the main reflection surface 600, and the main reflected light L3, L4, L6. This is a surface that causes part L3 of the light to be emitted as main emitted light L13 to the outside.

  The first main emission surface 611 is provided at the center of the surface (front surface) opposite to the surface (rear surface) of the main light emitting unit 6 facing the semiconductor light source 3. That is, the first main exit surface 611 is provided corresponding to the first entrance surface 601 and the central portion of the semiconductor light source 3. The first main exit surface 611 is horizontal or substantially horizontal with respect to the optical axis Z, and forms a circle or a circle with the optical axis Z as the center.

  The second main emission surface 612, the third main emission surface 613, and the fourth main emission surface 614 are surfaces (front surfaces) opposite to the surface (back surface) facing the semiconductor light source 3 of the main light emitting unit 6. ). That is, the second main emission surface 612, the third main emission surface 613, and the fourth main emission surface 614 are provided corresponding to the main reflection surface 600 and the side portion of the semiconductor-type light source 3.

  The second main exit surface 612 is provided so as to protrude to the front side with respect to the first main exit surface 611. The third main exit surface 613 is provided so as to protrude to the front side with respect to the second main exit surface 612. The fourth main exit surface 614 is provided so as to protrude to the front side with respect to the third main exit surface 613.

  The second main exit surface 612 and the third main exit surface 613 are horizontal or substantially horizontal with respect to the optical axis Z, and have an annular shape or a substantially annular shape centered on the optical axis Z. Eggplant. The fourth main exit surface 614 is horizontal or substantially horizontal with respect to the optical axis Z, and forms an annular shape or a substantially annular shape centered on the optical axis Z.

  That is, the fourth main exit surface 614 is provided between the first light guide reflection surface 631 and the second light guide reflection surface 632 as shown in FIG. A two-dot chain line S1 in FIG. 2 indicates a first boundary line between the fourth main emission surface 614 and the first light guide reflection surface 631, and a two-dot chain line S2 in FIG. A second boundary line between the four main exit surfaces 614 and the second light guide reflection surface 632 is shown. The fourth main exit surface 614 is lowered by one step from the front surface of the light guide portion 8 via the fourth step surface 624. The fourth main exit surface 614 may rise one step from the front surface of the light guide 8 via the third step surface 623, as indicated by a broken line in FIG. The fourth main exit surface 614 may not be provided. In this case, the front surface of the light guide 8 is provided to extend to the third step surface 623.

(Description of the first step surface 621, the second step surface 622, the third step surface 623, and the fourth step surface 624)
The first step surface 621 is provided between the first main exit surface 611 and the second main exit surface 612. The second step surface 622 is provided between the second main exit surface 612 and the third main exit surface 613. The third step surface 623 is provided between the third main exit surface 613 and the fourth main exit surface 614. The fourth step surface 624 is provided between the fourth main exit surface 614 and the front surface of the light guide unit 8.

  The first step surface 621 and the second step surface 622 are rotation surfaces obtained by rotating a straight line or a curve about the optical axis Z as a rotation axis. The third step surface 623 and the fourth step surface 624 are a part of a rotation surface obtained by rotating a straight line or a curve with the optical axis Z as a rotation axis (a part corresponding to the fourth main reflection surface 614). ). The first step surface 621, the second step surface 622, the third step surface 623, and the fourth step surface 624 are at least a molding die of the lens member 4 in the optical axis Z direction (see FIG. It is a surface that is inclined by a draft angle (not shown).

(Description of the first main exit surface 611, the second main exit surface 612, the third main exit surface 613, and the fourth main exit surface 614)
A diffusion unit (not shown) for diffusing the main emitted light L13 is provided in front of the first main exit surface 611, the second main exit surface 612, the third main exit surface 613, and the fourth main exit surface 614. ) Are provided. The diffusion unit is configured by, for example, a fisheye prism. As a result, even if the first step surface 621 and the second step surface 622 are provided between the first main exit surface 611, the second main exit surface 612, and the third main exit surface 613, The first main exit surface 611, the second main exit surface 612, and the third main exit surface 613 emit light in a circular or almost circular shape including the first step surface 621 and the second step surface 622. As a result, the main light emitting section 6 emits light in a circular shape or a substantially circular shape, as shown by a circular shape in FIG.

(Description of first light guide reflection surface 631)
The first light guide reflection surface 631 is a part of the main reflected light L3, L4, and L6 reflected by the main reflection surface 600 that faces the sub-light emitting portion 7 and is reflected by the first light guide reflected light. L5 (refer to the solid line arrow in FIG. 4) is a surface that is totally reflected in the light guide unit 8 and toward the sub light emitting unit 7 side. The first light guide reflection surface 631 is inclined by about 45 ° with respect to the optical axis Z. As a result, a part L4 of the main reflected light L3, L4, L6 parallel or substantially parallel to the optical axis Z is totally reflected by about 90 °, and the first perpendicular to or substantially perpendicular to the optical axis Z is obtained. It becomes the light guide part reflected light L5.

  The first light guide reflection surface 631 is a part of a rotation surface obtained by rotating a straight line about the optical axis Z as a rotation axis. The first light guide reflection surface 631 includes the third step surface 623, the fourth main exit surface 614, and the fourth step surface 624 on an arc line extending from the third step surface 623, the fourth main exit surface 614, and the fourth step surface 624. The fourth main exit surface 614 and the fourth step surface 624 are provided between the arcs. That is, the first light guide reflection surface 631 is provided between the two first boundary lines S1.

(Explanation of ranges W1 and W2)
The ranges W1 and W2 for reflecting the first light guide reflected light L5 from the first light guide reflecting surface 631 toward the sub light emitting part 7 are two of the four main light emitting parts 6. The range W1 in the case of the main light emitting unit 6 is different from the range W2 in the case of the two main light emitting units 6 at the left and right ends.

  That is, as shown in FIG. 2, the range W1 in the case of the two main light emitting units 6 is the main light emitting unit 6 (the second main light emitting unit 6 from the left in FIG. 1). 2, among the outermost edges of the second main light emitting portion 6 from the lower side in FIG. 2, the main light emitting portions 6 and 6 adjacent to both sides (the first main light emitting portion 6 from the left side in FIG. 1). The outermost edge of the third main light emitting portion 6 that faces the first main light emitting portion 6 from the lower side in FIG. 2 and the third main light emitting portion 6 (not shown). A range W1 between two perpendicular lines H and H respectively extending from the two points P and P to the sub-light-emitting portion 7. The central angle θ of the first light guide reflection surface 631 in the optical axis Z is determined by the range W1, and in this example is about 60 °.

  On the other hand, the range W2 in the case of the two main light emitting units 6 at the left and right ends is the main light emitting unit 6 (the first main light emitting unit 6 from the left in FIG. 1) as shown in FIG. 2 out of the outermost edges of the first main light emitting unit 6 from the lower side in FIG. 2, the adjacent main light emitting units 6 (the second main light emitting unit 6 from the left side in FIG. 1), In FIG. 2, the end of the lens member 4 (see FIG. 1) from one perpendicular line H <b> 1 extending from the outermost edge portion P <b> 1 on the side facing the second main light emitting portion 6) from the lower side to the sub light emitting portion 7. A range W2 between the left end in FIG. 1 and the lower end in FIG.

  The range W1 of the two main light emitting units 6 in the middle and the range W2 of the two main light emitting units 6 at the left and right ends are substantially equal or the range of the two main light emitting units 6 in the middle. W1 is smaller than the range W2 of the two main light emitting units 6 at the left and right ends by the width of the sub light emitting unit 7.

(Description of Second Light Guide Reflecting Surface 632)
The second light guide part reflecting surface 632 opposes the adjacent main light emitting part 6 and reflects a part L6 of the main reflected light L3, L4, L6 reflected by the main reflecting surface 600 to the second light guide part. This is a surface that is totally reflected as reflected light L7 (see solid arrow in FIG. 6) in the light guide 8 and adjacent to the main light emitting part 6. The second light guide reflection surface 632 is inclined by about 45 ° with respect to the optical axis Z. As a result, a part L6 of the main reflected light L3, L4, L6 parallel or substantially parallel to the optical axis Z is totally reflected by about 90 °, and the second perpendicular to or substantially perpendicular to the optical axis Z. It becomes the light guide part reflected light L7.

  The second light guide reflection surface 632 is a part of a rotation surface obtained by rotating a straight line about the optical axis Z as a rotation axis. The second light guide reflection surface 632 includes the third step surface 623 and the fourth step exit surface 623, and the fourth main exit surface 614 and the fourth step surface 624 on an arc line extending from the arc. The fourth main exit surface 614 and the fourth step surface 624 are provided between the arcs. That is, the second light guide reflection surface 632 is provided between the two second boundary lines S2.

(Description of sub-light emitting unit 7)
As shown in FIGS. 1 and 2, the sub light emitting unit 7 has a line shape corresponding to the four sides of the lens member 4 having a rectangular shape in front view. In addition, the sub-light emitting unit 7 has a quadrangular shape with a cross-sectional shape protruding from the front of the light guide unit 8 as shown in FIGS. 3, 4, and 9. The sub-light emitting unit 7 has a sub-reflecting surface 70 and a sub-emitting surface 71.

(Description of the sub-reflecting surface 70)
As shown in FIG. 4, the sub-reflecting surface 70 reflects the first light guide reflected light L <b> 5 reflected by the first light guide reflecting surface 631 and transmitted through the light guide 8 as a first sub-reflection. This is a surface that is totally reflected as light L8 (see the solid line arrow in FIG. 4) in the sub-light-emitting unit 7 toward the sub-emission surface 71 side.

  As shown in FIG. 9, the sub-reflecting surface 70 is the second light guide reflected light L7 reflected by the second light guide reflecting surface 632 and transmitted through the light guide 8, and the light guide The third light guide portion reflected light L9 reflected again by the third light guide portion reflecting surface 83 provided in the light portion 8 and transmitted through the light guide portion 8 is converted into the second sub reflected light L10 (in FIG. 6). This is a surface that is totally reflected on the side of the sub light emitting surface 71 in the sub light emitting portion 7 as a solid line arrow).

  The sub-reflecting surface 70 is inclined about 45 ° with respect to the optical axis Z. As a result, the first light guide portion reflected light L5 and the third light guide portion reflected light L9 perpendicular to or substantially perpendicular to the optical axis Z are totally reflected by about 90 ° and parallel to the optical axis Z or The first sub-reflection light L8 and the second sub-reflection light L10 are substantially parallel.

  The sub-reflecting surface 70 is a plane formed by extending straight lines in the directions of the four sides of the lens member 4. The sub-reflecting surface 70 is provided at a corner between the outer surface and the back surface of the sub-light emitting unit 7 so as to face the first light guide unit reflective surface 631 and the third light guide unit reflective surface 83. ing.

(Explanation of the auxiliary emission surface 71)
The sub-emission surface 71 is a surface that emits the first sub-reflection light L8 and the second sub-reflection light L10 reflected by the sub-reflection surface 70 to the outside as sub-emission light L11 and L12. The auxiliary emission surface 71 is provided in a line shape in the direction of the four sides of the lens member 4 on the front surface of the auxiliary light emitting unit 7. The secondary emission surface 71 is horizontal or substantially horizontal with respect to the optical axis Z.

  A diffusion portion (not shown) for diffusing the auxiliary emission lights L11 and L12 is provided in front of the auxiliary emission surface 71, respectively. The diffusion unit is composed of, for example, a triangular prism. As a result, the auxiliary emission surface 71 emits light in a line shape of four sides of the lens member 4. As a result, the sub-light-emitting unit 7 emits light in a line shape as shown by a line on which a large number of dots are given in FIG.

(Description of the light guide 8)
The light guide unit 8 is provided between the main light emitting unit 6 and the sub light emitting unit 7. The light guide 8 has a plate shape perpendicular to or substantially perpendicular to the optical axis Z. The light guide unit 8 supplies the first light guide reflected light L5, the second light guide reflected light L7, and the third light guide reflected light L9 from the main light emitting unit 6 to the sub light emitting unit 7. The optical axis Z is guided perpendicularly or substantially perpendicularly to the optical axis Z.

(Description of third light guide reflection surface 83)
A groove portion 80 is provided in a portion between the adjacent main light emitting portions 6 and 6 in the light guide portion 8. The second light guide reflected light L7 reflected by the second light guide reflecting surface 632 and transmitted through the light guide 8 is applied to the side wall parallel to or substantially parallel to the optical axis Z of the groove 80. The third light guide reflection surface 83 is provided to reflect the third light guide reflection light L9 toward the sub-reflection surface 70 side. As a result, the third light guide reflection surface 83 is provided in a portion of the light guide 8 between the adjacent main light emitters 6 and 6. The third light guide reflection surface 83 is a paraboloid obtained by extending a parabola with the focal point F3 at or near the center O of the light emitting unit 30 of the semiconductor light source 3 in the optical axis Z direction. . A hole may be used instead of the groove 80.

(Explanation of range W3)
A range W3 of reflecting the third light guide portion reflected light L9 from the third light guide portion reflecting surface 83 toward the sub light emitting portion 7 side is the two of the four main light emitting portions 6 adjacent to each other. This is a range between the main light emitting units 6 and 6.

(Description of the operation of the first embodiment)
The vehicular lamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  The light emitting unit 30 of the semiconductor light source 3 is turned on. Then, as shown in FIGS. 4, 6, and 8, light emitted from the central portion of the light emitting unit 30 of the semiconductor light source 3 is emitted from the first incident surface 601 of the main light emitting unit 6 of the lens member 4. The first incident light L 1 that is parallel to the optical axis Z of the main light emitting unit 6 enters the unit 6. On the other hand, the light emitted from the side of the light emitting unit 30 of the semiconductor light source 3 enters the main light emitting unit 6 from the second incident surface 602 of the main light emitting unit 6 as the second incident light L2.

  As shown in FIGS. 4, 6, and 8, the first incident light L <b> 1 that has entered the main light emitting unit 6 from the first incident surface 601 is emitted from the first main emitting surface 611 of the main light emitting unit 6. L13 is diffused outside and emitted. On the other hand, the second incident light L2 incident on the main light emitting unit 6 from the second incident surface 602 is the main reflection surface 600 of the main light emitting unit 6, and the main reflection parallel to or substantially parallel to the optical axis Z of the main light emitting unit 6. Total reflection is performed as lights L3, L4, and L6.

  A part L3 of the main reflected light L3, L4, and L6 is, as shown in FIGS. 4, 6, and 8, the second main exit surface 612, the third main exit surface 613, and the fourth main exit of the main light emitting unit 6. From the emission surface 614, it is diffused and emitted as main emission light L13. As a result, the main light emitting unit 6 emits light in a circular shape or a substantially circular shape, as shown by a circular shape in FIG.

  As shown in FIG. 4, a part L4 of the main reflected light L3, L4, L6 is totally reflected on the first light guide reflection surface 631 of the main light emitting part 6 and is perpendicular to the optical axis Z or The first light guide portion reflected light L5 is substantially vertical. The first light guide portion reflected light L5 is guided to the sub light emitting portion 7 side in the light guide portion 8, is totally reflected by the sub reflecting surface 70 of the sub light emitting portion 7, and is parallel to the optical axis Z. Or it becomes the substantially parallel 1st sub reflected light L8. The first sub-reflection light L8 is diffused and emitted as sub-emission light L12 from the sub-emission surface 71 of the sub-light emitting unit 7 to the outside.

  A part L6 of the main reflected light L3, L4, L6 is totally reflected on the second light guide part reflecting surface 632 of the main light emitting part 6 and is perpendicular to the optical axis Z as shown in FIG. The second light guide reflected light L7 is substantially vertical. The second light guide reflected light L7 is guided to the third light guide reflection surface 83 side of the light guide 8 in the light guide 8, and is totally reflected by the third light guide reflection surface 83. Thus, the third light guide portion reflected light L9 is perpendicular to or substantially perpendicular to the optical axis Z. The third light guide portion reflected light L9 is guided to the sub light emitting portion 7 side in the light guide portion 8, and is totally reflected by the sub reflecting surface 70 of the sub light emitting portion 7, and is parallel to the optical axis Z. Or it becomes the substantially parallel second sub-reflected light L10. The second sub-reflection light L10 is diffused and emitted as sub-emission light L11 from the sub-emission surface 71 of the sub-light emitting unit 7.

  As a result, the sub-light-emitting unit 7 emits light in a line shape as shown by a line on which many dots are given in FIG. That is, the sub light emitting unit 7 emits light in a line shape of four sides of the lens member 4. Thereby, as shown in FIG. 1, the circular light emitting surfaces of the four main light emitting units 6 and the line light emitting surfaces on the four sides of the sub light emitting unit 7 surrounding the circular light emitting surfaces of the four main light emitting units 6 are obtained. can get.

(Description of the effect of Embodiment 1)
The vehicular lamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  Since the vehicular lamp 1 according to the first embodiment does not have a branched reflection surface unlike the conventional vehicular lamp, the following effects can be achieved.

  That is, the light from the semiconductor light source 3 enters the main light emitting portion 6 from the first incident surface 601 and the second incident surface 602 as incident light L1 and L2. A part L1 of the incident lights L1 and L2 exits from the first main exit surface 611 as the main exit light L13. Further, a part L2 of the incident light L1, L2 is reflected as main reflected light L3, L4, L6 by the main reflecting surface 600. A part L3 of the main reflected light L3, L4, and L6 is emitted as the main emitted light L13 from the second main emitting surface 612, the third main emitting surface 613, and the fourth main emitting surface 614.

  On the other hand, a part L4 of the main reflected light L3, L4, L6 is reflected into the light guide 8 as the first light guide reflected light L5 by the first light guide reflection surface 631. In addition, a part L6 of the main reflected light L3, L4, and L6 is reflected into the light guide 8 by the second light guide reflection surface 632 as the second light guide reflection L7. And the 2nd light guide part reflected light L7 is reflected in the light guide part 8 by the 3rd light guide part reflective surface 83 as the 3rd light guide part reflected light L9. The first light guide portion reflected light L5 and the third light guide portion reflected light L9 are reflected by the sub reflective surface 70 as the first sub reflected light L8 and the second sub reflected light L10. The first sub-reflection light L8 and the second sub-reflection light L10 are emitted from the sub emission surface 71 as sub emission light L11 and L12.

  Thereby, the 1st main output surface 611, the 2nd main output surface 612, the 3rd main output surface 613, and the 4th main output surface 614 light-emit as a main light emission surface. Further, the sub light emitting surface 71 emits light as a sub light emitting surface. As described above, the vehicular lamp 1 according to the first embodiment does not have a branch reflection surface unlike the conventional vehicular lamp, and therefore, a dark portion is not particularly formed on the auxiliary light emitting surface.

  In the vehicular lamp 1 according to the first embodiment, four semiconductor light sources 3 are arranged, and the four main light emitting units 6 correspond to the four semiconductor light sources 3 and are arranged at intervals. In addition, by providing the first light guide reflection surface 631, the second light guide reflection surface 632, and the third light guide reflection surface 83, the following effects can be achieved.

  That is, the first light guide reflection surface 631 is opposed to the sub light emitting portion 7 and reflects a part L4 of the main reflected light L3, L4, L6 as the first light guide reflection light L5 to the sub reflection surface 70 side. Let The first light guide portion reflected light L5 is reflected by the sub-reflecting surface 70 as the first sub-reflecting light L8 toward the sub-emitting surface 71 side. The first sub reflected light L8 is emitted to the outside as the sub outgoing light L12 from the sub outgoing surface 71. Thereby, the range W1, W2 of the part facing the main light emission part 6 among the sub light emission parts 7 light-emits in a line form.

  On the other hand, the second light guide portion reflecting surface 632 faces the adjacent main light emitting portion 6, and a part L6 of the main reflected light L3, L4, L6 is used as the second light guiding portion reflected light L7 to be the adjacent main light emitting portion. Reflect to 6 side. The third light guide part reflecting surface 83 provided in the portion between the adjacent main light emitting parts 6, 6 in the light guide part 8 is reflected by the second light guide part reflecting surface 632 and in the light guide part 8. The second light guide part reflected light L7 that has passed through is reflected as the third light guide part reflected light L9 to the sub-reflecting surface 70 side.

  The third light guide portion reflected light L9 is reflected by the sub-reflecting surface 70 as the second sub-reflecting light L10 toward the sub-emitting surface 71. The second secondary reflected light L10 is emitted to the outside as the secondary outgoing light L11 from the secondary outgoing surface 71. Thereby, the range W3 of the part which opposes the part (3rd light guide part reflective surface 83) between the adjacent main light emission parts 6 and 6 among the sublight emission parts 7 light-emits in a line form.

  As a result, even if four semiconductor light sources 3 are arranged and the main light emitting units 6 correspond to the four semiconductor light sources 3 and are arranged at intervals, the sub light emitting units 7 emits light in a line shape over the entire range W1, W2, W3. That is, there is no case where a dark portion is formed in a portion between the adjacent main light emitting portions 6 and 6 in the sub light emitting portion 7.

  In the vehicular lamp 1 according to the first embodiment, the range W1 in which the first light guide reflection light L5 is reflected from the first light guide reflection surface 631 toward the sub-reflection surface 70 is the outermost edge of the main light emission unit 6. A range between two perpendicular lines H and H respectively extending from the two outermost edges P and P on the side facing the main light emitting sections 6 and 6 adjacent to both sides to the sub light emitting section 7. As a result, the central angle θ on the optical axis Z of the first light guide reflection surface 631 is determined by the range W1, and is about 60 ° in this example.

  Thereby, the light intensity at both ends of the light emission range W1 of the sub light emitting unit 7 is about 80% or more of the light intensity at the center of the light emission range W1 of the sub light emitting unit 7. Can be held. Here, the light intensity is the amount of light flux of the first light guide reflected light L5 and the first sub reflected light L8 with respect to the unit area on the sub reflective surface 70.

(Description of Modifications 1 and 2 of Embodiment 1)
The lamp unit 5 of the vehicular lamp 1 according to the first embodiment is composed of four semiconductor-type light sources 3 and a rectangular lens member 4. As a result, as shown in FIG. 1, the light emission surface of the four circular main light emission parts 6 and the light emission surface of the rectangular sub-light emission part 7 of four sides are obtained.

  The lamp unit 5A of Modification 1 is composed of three semiconductor light sources 3 and an arc-shaped lens member 4A. As a result, as shown in FIG. 1, the light emitting surfaces of the three circular main light emitting portions 6 and the light emitting surfaces of the arc-shaped four-sided line-shaped sub light emitting portions 7 are obtained.

  The lamp unit 5B of Modification 2 is composed of five semiconductor-type light sources 3 and a cross-shaped lens member 4B. As a result, as shown in FIG. 1, the light emitting surfaces of the five circular main light emitting portions 6 and the light emitting surfaces of the cross-shaped side light emitting portions 7 are obtained.

(Description of configuration, operation, and effect of Embodiments 2, 3, and 4)
10, 11, and 12 show Embodiments 2, 3, and 4 of the vehicular lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 9 denote the same components. Hereinafter, the configuration of the vehicular lamp in the second, third, and fourth embodiments will be described.

  As shown in FIG. 1, the vehicular lamp 1 according to the first embodiment includes the light emitting surfaces of four circular main light emitting portions 6 and the light emitting surfaces of the sub-light emitting portions 7 in the form of four rectangular lines. , What you get. On the other hand, the vehicular lamp according to the second embodiment can obtain the light emitting surface of one circular main light emitting portion 6 and the light emitting surface of the square side light emitting portion 7A having four sides. It is. Further, the vehicular lamp according to the third embodiment can obtain a light emitting surface of one circular main light emitting portion 6 and a light emitting surface of a line-shaped sub light emitting portion 7B having a circular side. Further, the vehicular lamp according to the fourth embodiment can obtain a light emitting surface of one square main light emitting portion 6A and a light emitting surface of a square side light emitting portion 7A having four sides.

  Since the vehicular lamp in the second, third, and fourth embodiments is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp 1 in the first embodiment.

(Description of examples other than Embodiments 1 to 4)
In the first to fourth embodiments, the tail lamp of the rear combination lamp will be described. However, in the present invention, a vehicle lamp other than the rear combination lamp tail lamp, for example, a rear combination lamp stop lamp, tail stop lamp, turn signal lamp, clearance lamp, or front combination lamp clearance lamp, turn signal. It can also be applied to lamps and daytime running lamps.

  In the first to fourth embodiments, the semiconductor light source 3 is used as the light source. However, in the present invention, a light source other than the semiconductor light source 3 may be used as the light source.

  Further, in the present invention, the shape, configuration, and the like of the incident surface, the main reflection surface, the main output surface, the step surface, the light guide reflection surface, the sub reflection surface, and the sub output surface are not limited.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Lamp housing 20 Lamp chamber 3 Semiconductor type light source 30 Light emission part 31 Board | substrate 4, 4A, 4B Lens member 5, 5A, 5B Lamp unit 6, 6A Main light emission part 600 Main reflection surface 601 1st entrance surface 602 1st 2 entrance surface 611 1st main exit surface 612 2nd main exit surface 613 3rd main exit surface 614 4th main exit surface 621 1st step surface 622 2nd step surface 623 3rd step surface 624 4th step surface 631 1st Light guiding part reflecting surface 632 Second light guiding part reflecting surface 7, 7A, 7B Sub-light emitting part 70 Sub reflecting surface 71 Sub light emitting surface 8 Light guiding part 80 Groove part 83 Third light guiding part reflecting surface F1 Hyperbola of the first incident surface Focal point F2 parabolic focal point of main reflecting surface F3 parabolic focal point of third light guiding unit reflecting surface H, H1 perpendicular L1 first incident light L2 second incident light L3 main reflected light L4 main reflected light L5 first light guiding unit reflected light L6 Main reflected light L7 Second light guide portion reflected light L8 First sub reflected light L9 Third light guide portion reflected light L10 Second sub reflected light L11 Sub outgoing light L12 Sub outgoing light L13 Main outgoing light O Center P location P1 location S1 boundary line S2 boundary line W1 range W2 range W3 range Z optical axis

Claims (2)

A light source and a lens member;
The lens member is composed of a main light emitting part, a sub light emitting part, and a light guide part provided between the main light emitting part and the sub light emitting part,
The main light emitting unit includes an incident surface that allows light from the light source to enter the main light emitting unit, a main reflective surface that reflects a part of incident light that has entered the main light emitting unit from the incident surface, and A main emission surface for emitting a part of the main reflected light reflected by the main reflection surface, and a light guide part reflecting surface for reflecting a part of the main reflected light into the light guide part,
The sub-light emitting unit emits sub-reflected light reflected by the sub-reflecting surface and a sub-reflecting surface reflecting the light reflected by the light guide unit reflected by the light reflecting unit reflecting surface and transmitted through the light guide unit. a secondary emission surface, and possess,
A plurality of the light sources are arranged,
The main light emitting units correspond to the plurality of light sources, respectively, and a plurality of the main light emitting units are arranged at intervals.
The light guide part reflecting surface is opposed to the sub light emitting part and reflects a part of the main reflected light to the sub reflecting surface side as first light guide part reflected light; and A second light guide part reflecting surface facing the adjacent main light emitting part and reflecting a part of the main reflected light to the adjacent main light emitting part side as a second light guide part reflected light,
In the portion between the adjacent main light emitting portions of the light guide portion, the second light guide portion reflected light reflected by the second light guide portion reflection surface and transmitted through the light guide portion is third. A third light guide part reflecting surface is provided for reflecting light toward the sub-reflecting surface as light guide part reflected light.
A vehicular lamp characterized by the above. The range in which the first light guide portion reflected light is reflected from the first light guide portion reflecting surface to the sub-reflecting surface side faces the main light emitting portion adjacent to both sides of the outermost edge of the main light emitting portion. A range between two perpendicular lines respectively dropped from the two outermost edges on the side to the sub-light emitting part,
The vehicular lamp according to claim 1 .

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