Vehicle lighting fixture and lens body

Abstract

To provide a lighting fixture for a vehicle that can reduce a size of a lens body, and in turn, can reduce a size of the lighting fixture for a vehicle using the lens body.SOLUTION: A lighting fixture for a vehicle 10 comprises: a lens body 20; a first light source 30A; and a second light source 30B. The lens body includes a first incident surface 21 on which first light emitted by the first light source is incident, a total reflection part 23 including at least two first total reflection surfaces and an incident part 23b, a first light guide part 24 guiding the first light to the total reflection part, a second light guide part 25 guiding the first light and second light totally reflected by the first total reflection surface to an emission surface, and the emission surface from which the first light and the second light guided by the second light guide part are emitted. The first total reflection surface is a total reflection surface that totally reflects the first light. The incident part is an incident part on which the second light emitted by the second light source is incident. The at least two first total reflection surfaces are included in a same plane.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp and a lens body that can realize a compact lens body and, in turn, a compact vehicle lamp using the lens body. [Background technology]

[0002] A vehicle lamp including a lens body, a first light source, and a second light source is known (see, for example, Patent Document 1). Patent Document 1 describes a lens body including a lens surface in which reflective sections (total reflection surfaces) that totally reflect the light emitted by the first light source and transmissive sections (light entrance surfaces) through which the light emitted by the second light source enters are alternately arranged in a stepped pattern (see, in particular, FIG. 4 of Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-26462 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, the reflective portions (total reflective surfaces) are not arranged within the same plane, and the length of the lens body (the vertical length in FIG. 4 of Patent Document 1) is longer by the length of each transmissive portion, resulting in a problem that it is difficult to miniaturize the lens body, and therefore to miniaturize a vehicle lamp using the lens body.

[0005] The present invention has been made to solve these problems, and has an object to provide a vehicle lamp and a lens body that can reduce the size of the lens body, and ultimately reduce the size of the vehicle lamp using the lens body. [Means for solving the problem]

[0006] A vehicle lamp according to the present invention is a vehicle lamp including a lens body, a first light source, and a second light source, the lens body including a first light entrance surface, a total reflection section, a first light guiding section, a second light guiding section, and a light exit surface, the first light entrance surface is a light entrance surface into which a first light emitted by the first light source enters, the total reflection section includes at least two first total reflection surfaces and a light entrance section, the first light guiding section is a light guiding section that guides the first light entering from the first light entrance surface to the total reflection section so that the first light entering from the first light entrance surface is incident on the first total reflection surface, and the first total reflection surface is a light guiding section that guides the first light entering from the first light entrance surface to the total reflection section so that the first light entering from the first light entrance surface is incident on the first total reflection surface, the first light incident on the total reflection surface is totally reflected by the first total reflection surface; the light entrance portion is a light entrance portion through which the second light emitted by the second light source enters; the second light guiding portion is a light guiding portion that guides the first light totally reflected by the first total reflection surface and the second light entering from the light entrance portion to the light exit surface so that the first light totally reflected by the first total reflection surface and the second light entering from the light entrance portion exit from the light exit surface; the light exit surface is a light exit surface from which the first light and the second light guided by the second light guiding portion exit; and the at least two first total reflection surfaces are included in the same surface.

[0007] With such a configuration, it is possible to realize a reduction in the size of the lens body, and therefore a reduction in the size of a vehicle lamp using the lens body.

[0008] This is because the first total reflection surfaces are arranged in a state where they are included in the same plane.

[0009] In addition, in the above-mentioned vehicle lamp, the first total reflection surface may be a plurality of narrow total reflection surfaces, the light entrance portion may be a plurality of narrow light entrance portions, and the narrow total reflection surfaces and the narrow light entrance portions may be arranged in parallel and alternately.

[0010] In addition, the above-mentioned vehicle lamp may further include a second light entrance surface into which the second light emitted by the second light source enters, and a third light guiding section that guides the second light entering from the second light entrance surface to the light entrance section so that the second light entering from the second light entrance surface enters from the light entrance section.

[0011] Moreover, in the above-mentioned vehicular lamp, the third light guiding section may include a fourth light guiding section, a second total reflection surface, and a fifth light guiding section, the fourth light guiding section being a light guiding section that guides the second light entering from the second light entering surface to the second light entering surface so that the second light entering from the second light entering surface is incident on the second total reflection surface, the second total reflection surface being a total reflection surface that totally reflects the second light guided by the fourth light guiding section and incident on the second total reflection surface, and the fifth light guiding section being a light guiding section that guides the second light totally reflected by the second total reflection surface to the light entering section so that the second light totally reflected by the second total reflection surface is incident from the light entering section.

[0012] In addition, in the above-mentioned vehicle lamp, the lens body may further include the second light entrance surface and the third light guiding portion, and the narrow total reflection surface and the narrow light entrance portion may be configured by forming an interrupted groove portion in the lens body.

[0013] Moreover, in the above-mentioned vehicle lamp, the intermittent groove portion may be an intermittent V-groove extending intermittently in a direction intersecting a principal ray of the second light guided by the third light-guiding portion, the narrow total reflection surface may be one of two surfaces constituting the intermittent V-groove, and the narrow light entrance portion may be a portion between adjacent intermittent V-grooves.

[0014] In the above vehicle lamp, the narrow light entering portion may be formed in a state inclined according to an inclination of the second light entering as diffused light from the second light entering surface.

[0015] In the vehicle lamp, the pitch between adjacent ones of the interrupted V-grooves may be 1 mm or less.

[0016] In addition, in the above-mentioned vehicle lamp, the pitch between adjacent intermittent V grooves or the width of the intermittent V grooves may be adjusted so that the brightness of the light exit surface when the first light source is turned on and the second light source is turned off is substantially the same as the brightness of the light exit surface when the first light source is turned off and the second light source is turned on.

[0017] In addition, in the above-mentioned vehicle lamp, the pitch between adjacent intermittent V grooves or the width of the intermittent V grooves may be adjusted so that the brightness of the light exit surface when the first light source is turned on and the second light source is turned off differs from the brightness of the light exit surface when the first light source is turned off and the second light source is turned on.

[0018] In the vehicle lamp, the first light source and the second light source may have different emission colors.

[0019] In the vehicle lamp, the emission color of the first light source and the emission color of the second light source may be the same as each other.

[0020] The above vehicle lamp may further include another lens body separate from the lens body, and the other lens body may include the second light entrance surface and the third light guiding portion.

[0021] The lens body according to the present invention includes a first light entrance surface, a total reflection section, a first light guiding section, a second light guiding section, and a light exit surface, the first light entrance surface is a light entrance surface into which a first light enters, the total reflection section includes at least two first total reflection surfaces and a light entrance section, the first light guiding section is a light guiding section that guides the first light entering from the first light entrance surface to the total reflection section so that the first light entering from the first light entrance surface is incident on the first total reflection surface, and the first total reflection surface totally reflects the first light that is guided by the first light guiding section and enters the first total reflection surface. the first light guide portion is a total reflection surface having a first total reflection surface and a second light guided by the second light guide portion, the first light guided by the first total reflection surface and the second light guided by the second light guide portion are emitted from the light exit surface, and the second light guided by the second light guide portion is a total reflection surface having a first total reflection surface and a second light guided by the second light guide portion are emitted from the light exit surface, and the at least two first total reflection surfaces are included in the same surface. Effect of the Invention

[0022] According to the present invention, it is possible to provide a vehicle lamp and a lens body that can realize a reduction in the size of the lens body, and therefore a reduction in the size of the vehicle lamp using the lens body. [Brief description of the drawings]

[0023] [Figure 1] 1 is a perspective view of a vehicle lamp 10 (a first light source 30A and a second light source 30B are omitted). [Diagram 2] FIG. 2 is a longitudinal sectional view of FIG. 1 (a sectional view taken along a plane parallel to the XZ plane). [Diagram 3] FIG. [Figure 4] 4(a) is a view taken along the line A1 in FIG. 1, (b) is an enlarged view of a rectangle B1 in FIG. 4(a), (c) is a cross-sectional view taken along the line AA in FIG. 4(b), and (d) is a cross-sectional view taken along the line BB in FIG. 4(b). [Diagram 5] 2 is a diagram showing the optical paths of a first light Ray 30A and a second light Ray 30B. FIG. [Figure 6] 1 is a cross-sectional view of a lens body 40 of a comparative example. [Figure 7] This is an example in which narrow first total reflection surfaces 23a (inclined surfaces G1) and a surface onto which second light Ray30B enters (for example, a plane G2 parallel to the YZ plane) are arranged alternately. [Figure 8] 13 is a modified example of the lens body 20. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, a vehicle lamp 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each drawing, corresponding components are given the same reference numerals, and duplicated explanations will be omitted.

[0025] The vehicular lamp 10 of this embodiment is a vehicular signal lamp that functions as a turn lamp and a DRL lamp, and is mounted on both the left and right sides of the front end of a vehicle such as an automobile (not shown).

[0026] Fig. 1 is a perspective view of a vehicle lamp 10 (a first light source 30A and a second light source 30B are omitted). Fig. 2 is a vertical cross-sectional view of Fig. 1 (a cross-sectional view taken along a plane parallel to the XZ plane).

[0027] As shown in Figures 1 and 2, a vehicle lamp 10 includes a lens body 20, a first light source 30A, and a second light source 30B. For ease of explanation, XYZ axes are defined below as shown in Figure 1 etc. The X axis extends in the vehicle front-rear direction, the Y axis extends in the vehicle width direction, and the Z axis extends in the vertical direction.

[0028] Lens body 20 is made of a transparent resin such as acrylic or polycarbonate, and includes a first light entrance surface 21, a second light entrance surface 22, a total reflection section 23, a first light guiding section 24, a second light guiding section 25, a third light guiding section 26, and a light exit surface 27. Lens body 20 can be manufactured as a single unit by, for example, injection molding or machining.

[0029] The first light incident surface 21 receives light emitted by the first light source 30A (hereinafter, the first light Ray 30AThe first light incident surface 21 is a cylindrical lens surface whose cylindrical axis extends in the Y direction. The first light incident surface 21 is a light incident surface through which the first light Ray emitted by the first light source 30A enters. 30A The first light source 30A is disposed facing the first light incident surface 21 so that the first light Ray emitted by the first light source 30A enters the first light incident surface 21. 30A It may be a lens surface that collimates the light.

[0030] The second light incident surface 22 receives light emitted by the second light source 30B (hereinafter, the second light Ray 30B The second light incident surface 22 is a cylindrical lens surface whose cylindrical axis extends in the Y direction. The second light incident surface 22 is a lens surface through which the second light Ray emitted by the second light source 30B enters. 30B The second light source 30B is disposed facing the second light source 22 so that the second light Ray emitted by the second light source 30B enters the second light source 22. 30B It may be a lens surface that collimates the light.

[0031] Fig. 3 is a perspective view of the vicinity of total reflection portion 23. Fig. 4(a) is a view seen from the direction of the arrow A1 in Fig. 1, Fig. 4(b) is an enlarged view of the inside of rectangle B1 in Fig. 4(a), Fig. 4(c) is a cross-sectional view taken along line AA in Fig. 4(b), and Fig. 4(d) is a cross-sectional view taken along line BB in Fig. 4(b).

[0032] As shown in Figs. 3 and 4(b), the total reflection portion 23 includes a plurality of narrow first total reflection surfaces 23a (an example of a first total reflection surface of the present invention) and a plurality of narrow light entrance portions 23b (an example of a light entrance portion of the present invention). The narrow first total reflection surfaces 23a and the narrow light entrance portions 23b are formed (arranged) in parallel and alternately in the Y direction. The narrow first total reflection surfaces 23a (plurality) are included in the same plane P (plane; see Fig. 3). The length L of the narrow first total reflection surfaces 23a on the same plane P is 23a and the length L of the narrow light entrance portion 23b 23b are identical to each other (see Figure 3).

[0033] As shown in FIG. 4C, the narrow first total reflection surface 23a reflects the first light Ray guided by the first light guide section 24 and incident on the first total reflection surface 23a. 30A First total reflection surface 23a is, for example, a flat reflection surface that is arranged at an angle θ1 (see FIG. 2; for example, θ1=45°) with respect to the YZ plane. As shown in FIG. 4(d), narrow light entrance portion 23b receives second light Ray emitted by second light source 30B. 30B is the light entering part (clear part) where light enters (transmits).

[0034] Narrow first total reflection surface 23a and narrow light entrance portion 23b are configured by forming interrupted groove portions G (see FIG. 3) in lens body 20.

[0035] The interrupted groove portion G is a groove for guiding the second light Ray guided by the third light guide portion 26. 30B The V groove extends intermittently in a direction intersecting (for example, the orthogonal Y direction) with respect to the principal ray (see FIG. 4(d)). Hereinafter, they will be referred to as intermittent V grooves G. The pitch p (see FIG. 3) between the intermittent V grooves G is 1 mm or less.

[0036] As shown in Fig. 4(c), the intermittent V groove G is an upwardly opening V groove formed by an inclined surface G1 inclined at an angle θ1 with respect to the YZ plane and a plane G2 parallel to the YZ plane. The narrow light entrance portion 23b is a portion between adjacent intermittent V grooves G (see Fig. 3).

[0037] The narrow light entrance portion 23b is a second light Ray 30B The inclination of the ...

[0038] In FIG. 3, R0 denotes the second light ray 30B The reference symbol 23b1 represents the narrow light entrance portion 23b where the light ray R1 enters, and the reference symbol 23b2 represents the narrow light entrance portion 23b where the light ray R2 enters. Referring to FIG. 3, the second light Ray entering from the second light entrance surface 22 is30B The narrow light entrance portion 23b1 is configured so that the second light Ray (R1) enters the narrow light entrance portion 23b1 (transmits through the narrow light entrance portion 23b1). 30B Similarly, the second light Ray (R1) incident from the second light incident surface 22 is formed in a tilted state according to the tilt of the second light Ray (R2). 30B The narrow light entrance portion 23b2 is configured so that the second light Ray (R2) enters the narrow light entrance portion 23b2 (transmits through the narrow light entrance portion 23b2). 30B The other narrow light entrance portions 23b are formed in a tilted state according to the tilt of the light ray R2.

[0039] In this way, the narrow light entrance portion 23b is exposed to the second light Ray 30B By forming the second light ray guided by the third light guiding section 26 in a tilted state according to the tilt of the 30B The light (diffused light in the Y direction) can be incident from (transmitted through) the narrow light incident portion 23b (plurality of narrow light incident portions 23b).

[0040] As shown in FIG. 2, the first light guiding section 24 guides the first light Ray incident from the first light incident surface 21. 30A The first light Ray incident from the first light incident surface 21 is incident on the total reflection portion 23 (the first total reflection surfaces 23a (plural) having a narrow width). 30A to the total reflection section 23.

[0041] The first light-guiding section 24 includes a pair of main surfaces 24a, 24b (see FIG. 2) facing each other in the X-direction and a pair of side surfaces 24c, 24d (see FIG. 1) facing each other in the Y-direction, and is an inverted trapezoidal plate-like lens section in which the pair of side surfaces 24c, 24d open upward in a V-shape (see FIG. 1).

[0042] The third light guiding section 26 guides the second light Ray incident from the second light incident surface 22. 30B The second light Ray incident from the second light incident surface 22 is incident from the narrow light incident portion 23b (plurality of light incident portions). 30B to total reflection section 23 (narrow light entrance sections 23b (plural)).

[0043] The third light guiding section 26 will now be described in more detail.

[0044] As shown in FIGS. 1 and 2, third light guiding section 26 includes fourth light guiding section 26a, second total reflection surface 26b, and fifth light guiding section 26c.

[0045] The fourth light guiding portion 26a guides the second light Ray incident from the second light incident surface 22. 30B The second light Ray incident from the second light incident surface 22 is incident on the second total reflection surface 26b. 30B to second total reflection surface 26b.

[0046] The fourth light-guiding portion 26a includes a pair of main surfaces 26a1, 26a2 (see FIG. 2) facing each other in the X direction and a pair of side surfaces 26a3, 26a4 (see FIG. 1) facing each other in the Y direction, and is an inverted trapezoidal plate-like lens portion in which the pair of side surfaces 26a3, 26a4 open upward in a V-shape (see FIG. 1).

[0047] The second total reflection surface 26b reflects the second light Ray guided by the fourth light guiding section 26a and incident on the second total reflection surface 26b. 30B Second total reflection surface 26b is, for example, a flat reflection surface, and is disposed in a position inclined at angle θ2 (see FIG. 2; for example, θ2=45°) with respect to the YZ plane.

[0048] The fifth light guiding portion 26c guides the second light Ray totally reflected by the second total reflection surface 26b. 30B The second light Ray is totally reflected by the second total reflection surface 26b so that the second light Ray enters through the narrow light entrance portion 23b (plurality of light entrance portions). 30B to total reflection section 23 (narrow light entrance sections 23b (plural)).

[0049] The second light guiding section 25 guides the first light Ray totally reflected by the narrow first total reflection surfaces 23a (plural). 30A and the second light Ray incident from the narrow light incident portion 23b (plural). 30BThe first light Ray is totally reflected by the narrow first total reflection surfaces 23a (plurality of surfaces) so that the first light Ray is emitted from the light output surface 27. 30A and the second light Ray incident from the narrow light incident portion 23b (plural). 30B This is a light guiding section that guides the light to the light exit surface 27.

[0050] Second light guiding section 25 will now be described in more detail.

[0051] As shown in FIGS. 1 and 2, second light guiding section 25 includes sixth light guiding section 25a, third total reflection surface 25b, seventh light guiding section 25c, fourth total reflection surface 25d, and eighth light guiding section 25e.

[0052] The sixth light guiding portion 25a guides the first light Ray totally reflected by the narrow first total reflection surfaces 23a (plurality of surfaces). 30A and the second light Ray incident from the narrow light incident portion 23b (plural). 30B The first light Ray is totally reflected by the narrow first total reflection surfaces 23a (plurality of surfaces) so that the first light Ray is incident on the third total reflection surface 25b. 30A and the second light Ray incident from the narrow light incident portion 23b (plural). 30B to third total reflection surface 25b.

[0053] Third total reflection surface 25b reflects the first light Ray guided by sixth light guiding section 25a and incident on third total reflection surface 25b. 30A and the second light Ray 30B It is a total reflection surface that totally reflects light.

[0054] The seventh light guiding portion 25c guides the first light Ray totally reflected by the third total reflection surface 25b. 30A and the second light Ray 30B The first light Ray is totally reflected by the third total reflection surface 25b so that the first light Ray is incident on the fourth total reflection surface 25d. 30A and the second light Ray 30B to fourth total reflection surface 25d.

[0055] Fourth total reflection surface 25d reflects the first light Ray guided by seventh light guiding section 25c and incident on fourth total reflection surface 25d.30A and the second light Ray 30B It is a total reflection surface that totally reflects light.

[0056] The eighth light guiding portion 25e guides the first light Ray totally reflected by the fourth total reflection surface 25d. 30A and the second light Ray 30B The first light Ray is totally reflected by the fourth total reflection surface 25d so that the first light Ray is emitted from the light output surface 27. 30A and the second light Ray 30B This is a light guiding section that guides the light to the light exit surface 27.

[0057] The light exit surface 27 receives the first light Ray guided by the second light guide portion 25 as described above. 30A and the second light Ray 30B is a light-emitting surface from which light is emitted. For example, the light-emitting surface 27 is a rectangular flat surface whose outer shape is long in the Y direction and short in the Z direction (see FIG. 1). Note that the light-emitting surface 27 is not limited to this, and light-emitting surfaces 27 of various shapes may be used depending on the vehicle design and the lamp design.

[0058] The first light source 30A is a semiconductor light emitting element such as an LED that emits amber light. The first light source 30A has a light emitting surface (for example, a rectangular light emitting surface with a side length of 1 mm). The first light source 30A is mounted on a substrate (not shown) with the light emitting surface facing upward and facing the first light incident surface 21. The optical axis AX of the first light incident surface 21 is 21 and the optical axis AX of the first light source 30A 30A are consistent (almost consistent) (see Figure 2).

[0059] The second light source 30B is a semiconductor light emitting element such as an LED that emits white light. The second light source 30B has a light emitting surface (for example, a rectangular light emitting surface with a side length of 1 mm). The second light source 30B is mounted on a substrate (not shown) with the light emitting surface facing upward and facing the second light incident surface 22. The optical axis AX of the second light incident surface 22 is 22 and the optical axis AX of the second light source 30B 30B are consistent (almost consistent) (see Figure 2).

[0060] In the vehicle lamp 10 having the above configuration, a turn lamp can be realized by turning on the first light source 30A and turning off the second light source 30B.

[0061] FIG. 5 shows the first light Ray 30A and the second light Ray 30B FIG.

[0062] When the first light source 30A is turned on and the second light source 30B is turned off, as shown in FIG. 5 etc., the first light Ray emitted by the first light source 30A is 30A The first light entering surface 21 enters the lens 21. At this time, since the first light entering surface 21 is a cylindrical lens surface whose cylindrical axis extends in the Y direction, the first light Ray 30A The light enters as light that is concentrated in the X direction and diffused in the Y direction.

[0063] The first light Ray incident from the first light incident surface 21 30A The first light Ray is guided by the first light guiding section 24, enters the total reflection section 23 (narrow first total reflection surfaces 23a (plural)), and is totally reflected by the total reflection section 23 (narrow first total reflection surfaces 23a (plural)). 30A The first light Ray is finally guided by the second light guiding portion 25 to the light exit surface 27 and exits from the light exit surface 27. 30A In this case, the first total reflection surfaces 23a (plurality of thin surfaces) are arranged over the entire width of the lens body 20 in the Y direction, and the first light Ray 30A spreads across the entire thickness of lens body 20 (second light guiding section 25), so that the entire light exit surface 27 emits light (first light emitting section).

[0064] On the other hand, when the first light source 30A is turned off and the second light source 30B is turned on, as shown in FIG. 5 etc., the second light Ray emitted by the second light source 30B is 30B The second light entering surface 22 enters the lens 20. At this time, since the second light entering surface 22 is a cylindrical lens surface whose cylindrical axis extends in the Y direction, the second light Ray 30BThe second light Ray incident from the second light incident surface 22 is focused in the X direction and diffused in the Y direction. 30B is guided by fourth light guiding portion 26a, enters second total reflection surface 26b, is totally reflected by second total reflection surface 26b, is further guided by fifth light guiding portion 26c, and enters through narrow light entrance portions 23b (plural).

[0065] At that time, the narrow light entrance portions 23b (plural) receive the second light Ray 30B Since the second light ray is formed in an inclined state according to the inclination of the second light ray (see FIG. 3), the second light ray guided by the third light guiding section 26 30B The light (diffused in the Y direction) enters through the narrow light entrance portion 23b (or a plurality of narrow light entrance portions 23b) (or passes through the narrow light entrance portion 23b).

[0066] The second light Ray incident from the narrow light incident portion 23b (plurality) 30B The second light ray is finally guided by the second light guiding portion 25 to the light exit surface 27 and exits from the light exit surface 27. 30B In this case, the narrow light entrance parts 23b (multiple) are arranged over the entire width of the lens body 20 in the Y direction, and the second light Ray 30B spreads over the entire thickness of lens body 20 (second light guiding portion 25), so that the entire light exit surface 27 emits light (second light emitting portion).

[0067] In addition, if the first light source 30A is dimmer than the second light source 30B and the brightness (luminance) of the light-emitting surface 27 (first light-emitting portion) when the first light source 30A is turned on and the second light source 30B is turned off is darker than the brightness (luminance) of the light-emitting surface 27 (second light-emitting portion) when the first light source 30A is turned off and the second light source 30B is turned on, the pitch p (see Figure 3) between adjacent intermittent V-grooves G or the width in the Y direction of the intermittent V-grooves G may be adjusted so that the brightness (luminance) of the first light-emitting portion and the second light-emitting portion are the same (approximately the same).

[0068] Next, a comparative example will be described.

[0069] FIG. 6 is a cross-sectional view of a lens body 40 of a comparative example.

[0070] As shown in FIG. 6, in the lens body 40 of the comparative example, instead of the total reflection portion 23, a total reflection surface 23A similar to the second total reflection surface 26b is used. Otherwise, the lens body 40 of the comparative example has the same configuration as the lens body 20 of the above-described embodiment.

[0071] In the lens body 40 of the comparative example, the total reflection surface 23A and the second total reflection surface 26b are arranged at different positions in the Z direction, and the thickness in the Z direction is L1 (see FIG. 6). In contrast, in the lens body 20 of the above-described embodiment, the total reflection portion 23 and the second total reflection surface 26b are arranged at the same position in the Z direction, and the thickness in the Z direction is L2 (see FIG. 2. L2 < L1). That is, according to the above-described embodiment, there is an advantage that the thickness of the lens body 20 can be made thinner than that of the lens body 40 of the comparative example. Further, in the lens body 20 of the above-described embodiment, regarding the X direction, since the length L3 (see FIG. 2) of the second light incident surface 22 can be increased, the second light Ray 30B emitted from the second light source 30B has the advantage of improved capture efficiency.

[0072] As described above, according to the present embodiment, miniaturization of the lens body 20, and thus miniaturization of the vehicle lamp 10 using the lens body 20 can be realized.

[0073] This is because each of the first total reflection surfaces 23a is arranged in a state of being included in the same plane P (see FIG. 3).

[0074] Further, according to the present embodiment, by the total reflection portion 23, the first light Ray 30A and the second light Ray 30BSince the light is guided toward the light output surface 27 while spreading over the entire thickness of the lens body 20 (second light guiding portion 25), the brightness at the light output surface 27 becomes uniform (almost uniform), improving the lighting feeling. In particular, by making the pitch p (see FIG. 3) between the intermittent V-grooves G 1 mm or less, it is possible to make the dark areas between the narrow light entrance portions 23b less noticeable when the first light source 30A is turned on and the second light source 30B is turned off. Also, it is possible to make the dark areas between the narrow first total reflection surfaces 23a less noticeable when the first light source 30A is turned off and the second light source 30B is turned on. The pitch p may be 1 mm or more.

[0075] Furthermore, according to this embodiment, the thickness of the lens body 20 can be made thinner than that of the lens body 20A of the comparative example, and this allows the lens body 20 to be made lighter.

[0076] In addition, according to this embodiment, the brightness (luminance, light amount, etc.) on the light output surface 27 can be adjusted by adjusting the pitch p (see Figure 3) between adjacent intermittent V grooves G or the width of the intermittent V grooves G in the Y direction.

[0077] Next, a modified example will be described.

[0078] In the above embodiment, an example in which a light source that emits amber light is used as the first light source 30A and a light source that emits white light is used as the second light source 30B has been described, but the present invention is not limited thereto. For example, a light source that emits white light may be used as the first light source 30A and a light source that emits amber light may be used as the second light source 30B. For example, a light source that emits amber light may be used as the first light source 30A and a light source that emits red light may be used as the second light source 30B (when functioning as a turn lamp and a tail lamp). For example, a light source that emits red light may be used as the first light source 30A and a light source that emits a darker red light may be used as the second light source 30B (when functioning as a tail lamp and a stop lamp). For example, a light source that emits white light may be used as the first light source 30A and a light source that emits white light may be used as the second light source 30B (when functioning as a position lamp and a DRL lamp). When functioning as a position lamp and a DRL lamp, the pitch p (see FIG. 3) between adjacent intermittent V grooves G or the width in the Y direction of the intermittent V grooves G may be adjusted so that the brightness (luminance) of the first light emitting portion and the second light emitting portion differ from each other. Note that light sources having the same light emission color may be used as the first light source 30A and the second light source 30B and may be turned on simultaneously.

[0079] In addition, in the above embodiment, an example was described in which the intermittent V groove G is a V groove that opens upward and is composed of an inclined surface G1 inclined at an angle θ1 with respect to the YZ plane and a plane G2 parallel to the YZ plane (see Figure 4(c)), but this is not limited to this.

[0080] For example, as shown in FIG. 7, the narrow first total reflection surface 23a (inclined surface G1) is configured to reflect the second light Ray , which is guided by the fifth light guiding section 26c and exits from the end surface (plane G2) of the fifth light guiding section 26c. 30B 7 shows a surface G3 (for example, a plane parallel to the YZ plane) through which the first total reflection surface 23a (inclined surface G1) and the second light Ray 30B In this example, the first light Ray and the second light Ray are alternately arranged in the vertical direction (Z direction). 30B The number of surfaces G3 through which the light enters may be one or may be three or more.

[0081] In the above embodiment, an example has been described in which one lens body 20 including the second light entrance surface 22 and the third light guiding section 26 is used, but this is not limiting. For example, two lens bodies 20A and 20B (see FIGS. 8(a) and 8(b)) obtained by cutting the lens body 20 along a plane parallel to the YZ plane including the dashed line C1 in FIG. 4(c) and the dashed line C2 in FIG. 4(d) may be used. FIGS. 8(a) and 8(b) show modified examples of the lens body 20.

[0082] 8(c), the lens body 20B is omitted, and only the lens body 20A is used. 30B The light may be directly incident from narrow light entrance portions 23b (plurality of light entrance portions 23b) without passing through a light guide portion. FIG.

[0083] In the above embodiment, the second light guiding section 25 includes the sixth light guiding section 25a, the third total reflection surface 25b, the seventh light guiding section 25c, the fourth total reflection surface 25d, and the eighth light guiding section 25e. However, the second light guiding section 25 is not limited to this. That is, the second light guiding section 25 guides the first light Ray totally reflected by the first total reflection surface 23a (plurality) having a narrow width to the light ray 23b. 30A and the second light Ray incident from the narrow light incident portion 23b (plural). 30B As long as the light guide portion guides the light to the light exit surface 27, any configuration may be used.

[0084] In the above embodiment, the third light guiding section 26 includes the fourth light guiding section 26a, the second total reflection surface 26b, and the fifth light guiding section 26c. However, the present invention is not limited to this. That is, the third light guiding section 26 guides the second light Ray incident from the second light entrance surface 22 to the fourth light guiding section 26a. 30B The light guide section may have any configuration as long as it guides the light to the total reflection section 23 (narrow light entrance sections 23b (plural)).

[0085] In the above embodiment, the vehicle lamp of the present invention is applied to a vehicle signal lamp functioning as a turn lamp and a DRL lamp, but the present invention is not limited thereto. For example, the vehicle lamp and lens body of the present invention may be applied to a signal lamp functioning as a turn lamp and a tail lamp, a signal lamp functioning as a tail lamp and a stop lamp, a signal lamp functioning as a position lamp and a DRL lamp, or other vehicle signal lamp. The vehicle lamp and lens body of the present invention may be applied not only to vehicle signal lamps, but also to accessory lamps (vehicle accessory lamps) and general lighting.

[0086] The numerical values ​​shown in the above embodiments are all examples, and it goes without saying that suitable numerical values ​​different from these can be used.

[0087] The above-described embodiments are merely examples in all respects. The present invention should not be construed as being limited by the description of the above-described embodiments. The present invention can be implemented in various other forms without departing from the spirit or main characteristics thereof. [Explanation of symbols]

[0088] 10... Vehicle lamp, 20, 20A, 20B... Lens body, 21... First light incident surface, 22... Second light incident surface, 23... Total reflection part, 23A... Total reflection surface, 23a... First total reflection surface, 2 3b...Light entrance part, 23b1...Light entry part, 23b2...Light entry part, 24...First light guide part, 24a, 24b...Main surface, 24c, 24d...Side surface, 25...Second light guide part, 25a...Sixth light guide portion, 25b...third total reflection surface, 25c...seventh light guiding portion, 25d...fourth total reflection surface, 25e...eighth light guiding portion, 26...third light guiding portion, 26a...fourth light guiding portion, 26a1, 26a2...main surface, 26a3, 26a4...side surface, 26b...second total reflection surface, 26c...fifth light guiding portion, 27...light output surface, 30A...first light source, 30B...second light source, 40...lens body, AX 21 , AX 22 , AX 30A , AX 30B …Optical axis, G…Intermittent groove section (intermittent V groove), G1…Inclined surface, G2…Plane, P…Same surface, R0…Chief ray, R1, R2…Light ray, Ray 30A …The first light, Ray30B ...second light, p...pitch, θ1, θ2...angle

Claims

1. A vehicle lamp including a lens body, a first light source, and a second light source, The lens body includes a first light entrance surface, a total reflection portion, a first light guide portion, a second light guide portion, and a light exit surface; the first light incident surface is a light incident surface through which a first light emitted by the first light source enters, The total reflection portion includes at least two first total reflection surfaces and a light entrance portion, the first light guiding section is a light guiding section that guides the first light incident from the first light incident surface to the total reflection section so that the first light incident from the first light incident surface is incident on the first total reflection surface, the first total reflection surface is a total reflection surface that totally reflects the first light that is guided by the first light guiding section and enters the first total reflection surface, the light entrance portion is a light entrance portion through which second light emitted by the second light source enters, the second light guiding section is a light guiding section that guides the first light totally reflected by the first total reflection surface and the second light incident from the light entrance section to the light exit surface so that the first light totally reflected by the first total reflection surface and the second light incident from the light entrance section are emitted from the light exit surface, the light exit surface is a light exit surface from which the first light and the second light guided by the second light guiding portion exit, The at least two first total reflection surfaces are included in the same plane.

2. the first total reflection surface is a plurality of narrow total reflection surfaces, The light entrance portion is a plurality of narrow light entrance portions, The vehicle lamp according to claim 1 , wherein the narrow total reflection surfaces and the narrow light entrance portions are arranged in parallel and alternately.

3. a second light incident surface through which the second light emitted from the second light source enters; 3. The vehicular lamp according to claim 2, further comprising: a third light guiding portion that guides the second light entering from the second light entering surface to the light entering portion so that the second light entering from the second light entering surface enters from the light entering portion.

4. the third light guiding portion includes a fourth light guiding portion, a second total reflection surface, and a fifth light guiding portion; the fourth light guiding unit is a light guiding unit that guides the second light incident from the second light incident surface to the second light incident surface so that the second light incident from the second light incident surface is incident on the second total reflection surface, the second total reflection surface is a total reflection surface that totally reflects the second light that is guided by the fourth light guiding section and enters the second total reflection surface, 4. The vehicular lamp according to claim 3, wherein the fifth light guiding portion is a light guiding portion that guides the second light that has been totally reflected by the second total reflection surface to the light entrance portion so that the second light that has been totally reflected by the second total reflection surface enters from the light entrance portion.

5. The lens body further includes the second light entrance surface and the third light guiding portion, 5. The vehicle lamp according to claim 3, wherein the narrow total reflection surface and the narrow light entrance portion are configured by forming an intermittent groove in the lens body.

6. the interrupted groove portion is an interrupted V-groove extending intermittently in a direction intersecting a principal ray of the second light guided by the third light guiding portion, the narrow total reflection surface is one of two surfaces constituting the interrupted V-groove, The vehicular lamp according to claim 5 , wherein the narrow light entrance portion is a portion between the adjacent interrupted V-grooves.

7. The vehicle lamp according to claim 6 , wherein the narrow light entrance portion is formed in a state inclined according to an inclination of the second light entering as diffused light from the second light entrance surface.

8. 8. The vehicular lamp according to claim 6, wherein a pitch between adjacent ones of the interrupted V-grooves is 1 mm or less.

9. 9. The vehicle lamp according to claim 6, wherein the pitch between adjacent intermittent V-grooves or the width of the intermittent V-grooves is adjusted so that the brightness of the light-emitting surface when the first light source is turned on and the second light source is turned off is substantially the same as the brightness of the light-emitting surface when the first light source is turned off and the second light source is turned on.

10. 9. The vehicle lamp according to claim 6, wherein the pitch between adjacent intermittent V-grooves or the width of the intermittent V-grooves is adjusted so that the brightness of the light-emitting surface when the first light source is turned on and the second light source is turned off differs from the brightness of the light-emitting surface when the first light source is turned off and the second light source is turned on.

11. The vehicular lamp according to claim 9 , wherein the first light source and the second light source have different emission colors.

12. The vehicular lamp according to claim 10, wherein the emission color of the first light source and the emission color of the second light source are the same.

13. Further comprising another lens body separate from the lens body, The vehicle lamp according to claim 3 , wherein the other lens body includes the second light entrance surface and the third light guiding portion.

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