Vehicle lighting

Abstract

Ensure a sufficiently wide light-emitting area while also ensuring uniformity of light. [Solution] The device comprises a first light guide having a first emission surface and a first control step, a second light guide having a second emission surface and a second control step, a third light guide having a third emission surface and a third control step, and at least one light source, wherein the first emission surface, the third emission surface and the second emission surface are positioned sequentially in the vertical direction, the end of the first control step on the light source side is formed as the first end, the end of the second control step on the light source side is formed as the second end, the end of the third control step on the light source side is formed as the third end, and the third end is formed at a position further away from the light source than the first end and the second end.

Description

Technical Field

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[0001] The present invention relates to the technical field of vehicle lamps having a configuration for guiding light by a light guide portion.

Background Art

[0002] Some vehicle lamps are configured such that a light source that emits light and a light guide that guides the light emitted from the light source are disposed inside a lamp outer casing formed by a cover and a lamp housing, and the light is controlled (reflected) by a control step formed in the light guide portion and then emitted (see, for example, Patent Document 1 and Patent Document 2).

[0003] In the vehicle lamps described in Patent Document 1 and Patent Document 2, the light guide portion is formed in a long shape that is long in a predetermined direction, a part of the peripheral surface of the light guide portion is formed as an emission surface, and the light guided in the light guide portion is controlled by a control step and emitted from the emission surface.

[0004] In the vehicle lamp described in Patent Document 1, both end surfaces of the light guide portion are formed as reflection surfaces, and the light is reflected by the reflection surfaces to suppress light leakage to the outside and effectively utilize the light emitted from the light source.

[0005] In the vehicle lamp described in Patent Document 2, the cross-sectional area of the end portion on the incident side is formed to increase as it is separated from the incident surface, and the incident angle when the light guided is internally reflected becomes gradually smaller, making it difficult for the incident angle to be greater than the critical angle, thereby effectively utilizing the light emitted from the light source.

Prior Art Documents

Patent Documents

[0006] ]>

Patent Document 1

Patent Document 2

Summary of the Invention

[0007] Incidentally, in vehicle lighting fixtures having the above-described configuration for guiding light, the amount of light attenuation increases with the distance the light is guided from the incident surface. As a result, the amount of light emitted from the exit surface changes, and uniformity of light cannot be ensured, which may reduce visibility. In particular, in configurations with long light guide sections as described above, the light guidance distance tends to be long, making it easier for uniformity of light to be compromised.

[0008] Furthermore, in order to ensure visibility in vehicle lighting fixtures, it is desirable to ensure a sufficiently wide light-emitting area in the vertical direction, in addition to uniformity of light.

[0009] Therefore, the vehicle lighting device of the present invention aims to ensure uniformity of light while securing a sufficiently wide light-emitting area. [Means for solving the problem]

[0010] The vehicle light fixture according to the present invention comprises: a first light guide having a first incident surface, a first control step, and a first exit surface, wherein light incident from the first incident surface is reflected by the first control step and exited from the first exit surface; a second light guide having a second incident surface, a second control step, and a second exit surface, wherein light incident from the second incident surface is reflected by the second control step and exited from the second exit surface; and a third light guide having a third incident surface, a third control step, and a third exit surface, wherein light incident from the third incident surface is reflected by the third control step and exited from the third exit surface. The device comprises a third light guide and at least one light source that emits light toward the first incident surface, the second incident surface, and the third incident surface, wherein the first output surface, the third output surface, and the second output surface are positioned sequentially in the vertical direction, the end of the first control step on the light source side is formed as the first end, the end of the second control step on the light source side is formed as the second end, and the end of the third control step on the light source side is formed as the third end, with the third end being positioned further away from the light source than the first end and the second end.

[0011] As a result, light is emitted from the first, third, and second emission surfaces, which are positioned sequentially in the vertical direction, and the position where the light is controlled by the third control step is different in the light guide direction from the position where the light is controlled by the first and second control steps. [Effects of the Invention]

[0012] According to the present invention, light is emitted from the first, third, and second emission surfaces, which are sequentially positioned in the vertical direction, and the position where the light is controlled by the third control step is different in the light guide direction from the position where the light is controlled by the first and second control steps. Therefore, the light emission area in the width direction is increased, and since the positions of the light emitted from the first, second, and third emission surfaces are different, it is possible to ensure a light emission area of ​​sufficient width while ensuring uniformity of the light. [Brief explanation of the drawing]

[0013] [Figure 1] This shows an embodiment of the vehicle lamp of the present invention together with FIGS. 2 to 8, and this figure is a perspective view of the vehicle lamp. [Figure 2] It is a perspective view showing the internal structure etc. of the vehicle lamp. [Figure 3] It is a cross-sectional view taken along line III-III of FIG. 1. [Figure 4] It is a cross-sectional view taken along line IV-IV of FIG. 1. [Figure 5] It is an enlarged perspective view showing the back sides of the first light guide and the second light guide together with the substrate. [Figure 6] It is a rear view of the first light guide and the second light guide. [Figure 7] It is a rear view showing the positional relationship between the first light guide and the second light guide and the third control step formed thereon. [Figure 8] It is a conceptual diagram showing the light emission state.

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments for carrying out the vehicle lamp of the present invention will be described with reference to the accompanying drawings.

[0015] Hereinafter, the front-rear, up-down, left-right directions will be described with the irradiation direction of light from the vehicle lamp being the front. However, the front-rear, up-down, left-right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.

[0016] The vehicle lamp 1 functions as, for example, a tail lamp. However, the vehicle lamp 1 is not limited to a tail lamp, and may be other types of lamps such as a clearance lamp or a high-mounted stop lamp.

[0017] The vehicle lamp 1 includes a lamp housing 2 having an opening at the front end and a cover 3 closing the opening of the lamp housing 2, and is formed in a horizontally long shape (see FIGS. 1 and 2). Both the lamp housing 2 and the cover 3 are formed in a horizontally long shape. The lamp housing 2 and the cover 3 constitute a lamp outer casing 4, and an internal space of the lamp outer casing 4 is formed as a lamp chamber 5.

[0018] A plurality of mounting bosses 2a protruding forward are provided on the lamp housing 2 at intervals in the left - right direction.

[0019] In the lamp chamber 5, an inner lens 6, a first light guide 7, a second light guide 8, and a holder 9 are arranged in order from the front side (see FIGS. 2 to 4). The inner lens 6, the first light guide 7, the second light guide 8, and the holder 9 are all formed in a horizontally long shape, and the left - right direction is the longitudinal direction. Incidentally, in the lamp chamber 5, in addition to the inner lens 6, the first light guide 7, the second light guide 8, and the holder 9, other members such as an extension may be arranged.

[0020] The inner lens 6 has a function of diffusing light and is formed of, for example, an opalescent resin material. The inner lens 6 is attached to the cover 3 by, for example, screwing.

[0021] The first light guide 7 has a first light guide portion 10 extending in the left - right direction, a second light guide portion 11 extending in the left - right direction, a connecting portion 12 connecting the two, and a plurality of protruding portions 13 protruding from the first light guide portion 10, and each part is integrally formed. However, the first light guide portion 10 and the second light guide portion 11 may be provided as separate members. Also, although the first light guide portion 10 and the second light guide portion 11 extend in the left - right direction as a whole, for example, both left and right ends may be formed in a shape curved to the front side or the rear side.

[0022] The first light guide portion 10 and the second light guide portion 11 are formed with a cross - sectional shape, for example, in a substantially circular shape, and are spaced apart vertically. The first light guide portion 10 is located above the second light guide portion 11. The first light guide portion 10 and the second light guide portion 11 have the same length in the left - right direction.

[0023] The first light guide section 10 has both end faces in the longitudinal direction (light guide direction) formed as first incident surfaces 10a, and the front portion of the circumferential surface is formed as the first exit surface 10b (see Figures 2 and 5). A first control step 14 is formed on the rear portion of the circumferential surface of the first light guide section 10. The first control step 14 is formed over the entire longitudinal direction of the first light guide section 10 and has the function of totally reflecting (internal reflection) the light guided by the first light guide section 10 toward the first exit surface 10b. Both ends of the first control step 14 (the ends on the first light source side, which will be described later) are each designated as first ends 14a.

[0024] The second light guide section 11 has both end faces in the longitudinal direction (light guide direction) formed as second incident surfaces 11a, and the front portion of the circumferential surface is formed as the second exit surface 11b. A second control step 15 is formed on the rear portion of the circumferential surface of the second light guide section 11. The second control step 15 is formed over the entire longitudinal direction of the second light guide section 11 and has the function of totally reflecting (internal reflection) the light guided by the second light guide section 11 toward the second exit surface 11b. Both ends of the second control step 15 (the ends on the second light source side, which will be described later) are each designated as second ends 15a.

[0025] The connecting portion 12 is formed in a flat plate shape facing in the front-to-back direction and has the function of connecting the first light guide portion 10 and the second light guide portion 11. The connecting portion 12 is shorter than the length of the first light guide portion 10 and the second light guide portion 11, and the intermediate portions in the longitudinal direction of the first light guide portion 10 and the second light guide portion 11 are connected by the connecting portion 12.

[0026] The first light guide 7 has multiple reinforcing parts 16 spaced apart on the left and right sides between the first light guide section 10 and the second light guide section 11. For example, four reinforcing parts 16 are provided, located between the ends of the first light guide section 10 and the second light guide section 11 in the longitudinal direction, and between the parts closer to the ends of the first light guide section 10 and the second light guide section 11 in the longitudinal direction. The number and position of the reinforcing parts 16 on the first light guide 7 are arbitrary.

[0027] In the first light guide 7, the bending of the first light guide section 10 and the second light guide section 11 is suppressed by the connecting section 12 and the reinforcing section 16, thereby ensuring high strength of the first light guide 7. However, if sufficient strength is ensured in the first light guide 7, the reinforcing section 16 may not be provided.

[0028] Each protruding portion 13 has a base portion 17 that protrudes rearward from the upper end of the first light guide portion 10 and a mounting portion 18 that protrudes upward from the rear end of the base portion 17, and multiple such portions are provided spaced apart on the left and right. A screw insertion hole 18a is formed in the mounting portion 18.

[0029] The first light guide 7 has multiple spaces 7a formed between the first light guide portion 10 and the second light guide portion 11, where the connecting portion 12 and the reinforcing portion 16 are absent.

[0030] The second light guide 8 has a third light guide portion 19 extending in the left-right direction and a plurality of connecting protrusions 20 projecting from the third light guide portion 19, and each part is formed integrally. The third light guide portion 19 extends in the left-right direction as a whole, but for example, it may be formed in a shape in which both the left and right ends are curved forward or backward, similar to the first light guide portion 10 and the second light guide portion 11.

[0031] The third light guide portion 19 has a cross-sectional shape that is, for example, roughly circular. The third light guide portion 19 is made to be approximately the same length as the first light guide portion 10 and the second light guide portion 11, and its vertical width is the same as or slightly smaller than the distance between the first light guide portion 10 and the second light guide portion 11.

[0032] The third light guide section 19 has both end faces in the longitudinal direction (light guide direction) formed as third incident surfaces 19a, and a portion of the front part of the circumferential surface is formed as the third exit surface 19b. A third control step 21 is formed on a portion of the rear part of the circumferential surface of the third light guide section 19. The third control step 21 is formed in the middle part in the longitudinal direction of the third light guide section 19 and has the function of totally reflecting (internal reflection) the light guided by the third light guide section 19 toward the third exit surface 19b. The third control step 21 is not formed on the end faces in the longitudinal direction of the third light guide section 19, and in the third light guide section 19, only the front part of the circumferential surface of the third control step 21 is the third exit surface 19b. Both ends of the third control step 21 (the ends on the third light source side described later) are each designated as third ends 21a.

[0033] Each coupling projection 20 has a base portion 22 that protrudes rearward from the upper end of the third light guide portion 19 and a mounting piece portion 23 that protrudes upward from the rear end of the base portion 22, and multiple coupling projections are provided spaced apart on the left and right sides. A boss insertion hole 23a is formed in the mounting piece portion 23. For example, three coupling projections 20 are provided, protruding from the portions near both left and right ends of the second light guide portion 11 and from the central portion of the second light guide portion 11 in the left-right direction.

[0034] The holder 9 has a holding portion 24 extending in the left-right direction and a plurality of connecting pieces 25 protruding from the holding portion 24, and each part is integrally formed from, for example, a milky white resin material. The holder 9 has the function of holding the second light guide 8, but it may also have the function of a reflector that reflects light including leaked light emitted from the first light guide 7 and the second light guide 8.

[0035] The holding portion 24 is formed in a concave shape with an opening at the front. The number of connecting pieces 25 is the same as the number of protruding portions 13 of the first light guide body 7, and each is positioned directly behind the protruding portion 13. A boss insertion hole 25a is formed in the connecting piece 25.

[0036] The first light guide 7 is attached to the lamp housing 2, for example, by screwing the mounting portion 18 (see Figures 3 and 4).

[0037] When the first light guide 7 is attached to the lamp housing 2, the three mounting parts 18 located at both ends and in the center are secured by mounting screws 100 to the mounting bosses 2a, with the mounting bosses 2a being inserted from the rear into the boss insertion holes 23a of the mounting piece 23 of the second light guide 8 and the boss insertion holes 25a of the connecting piece 25 of the holder 9 (see Figure 3). At this time, the mounting parts 18 press down on the mounting piece 23 and the connecting piece 25 from the front, and the second light guide 8 and the holder 9 are attached to the lamp housing 2 together with the first light guide 7.

[0038] Furthermore, when attaching the first light guide 7 to the lamp housing 2, the other mounting portion 18 is screwed to the mounting boss 2a by the mounting screw 100 with the mounting boss 2a inserted from the rear through the boss insertion hole 25a of the connecting piece portion 25 (see Figure 4). At this time, the connecting piece portion 25 is pressed from the front by the mounting portion 18, and the holder 9 is attached to the lamp housing 2 together with the first light guide 7.

[0039] Furthermore, in the vehicle lighting device 1, for example, the lower end of the first light guide 7 may be provided with an engaging portion that engages with the holder 9 or the lamp housing 2, the lower end of the second light guide 8 may be provided with an engaging portion that engages with the holder 9 or the lamp housing 2, and the lower end of the holder 9 may be provided with an engaging portion that engages with the lamp housing 2.

[0040] As described above, the first light guide 7, the second light guide 8, and the holder 9 are each provided with an upwardly projecting mounting portion 18, mounting piece 23, and connecting piece 25, and there are no downwardly projecting portions. Therefore, the mounting space for the first light guide 7, the second light guide 8, and the holder 9 is reduced, making the vehicle lighting fixture 1 smaller, and the installation work of the first light guide 7, the second light guide 8, and the holder 9 to the lamp housing 2 can be easily performed.

[0041] When the first light guide 7, the second light guide 8, and the holder 9 are attached to the lamp housing 2, the second light guide 8 is held by the holder 9, and the third light guide portion 19 of the second light guide 8 is positioned directly behind the first light guide portion 10 and the second light guide portion 11 of the first light guide 7 (see Figures 3, 4, and 6). At this time, the entire third control step 21 of the second light guide 8 is positioned directly behind the connecting portion 12 of the first light guide 7 (see Figure 7). The left and right ends of the third control step 21 are positioned inward from the left and right ends of the connecting portion 12, and are not present on the rear side of the left and right ends 12a of the connecting portion 12.

[0042] Furthermore, in the vehicle lighting device 1, the first control step 14 and the second control step 15 are formed over the entire longitudinal portion of the first light guide section 10 and the second light guide section 11, respectively, and the third control step 21 is formed in the middle portion of the longitudinal portion of the third light guide section 19. Therefore, when the first light guide 7, the second light guide 8 and the holder 9 are attached to the lamp housing 2, the third end 21a is positioned further away from the light source than the first end 14a and the second end 15a (see Figures 6 and 7).

[0043] Substrates 26 are positioned on both the left and right sides of the first light guide 7 and the second light guide 8, respectively. A first light source 27, a second light source 28, and a third light source 29 are mounted on the substrates 26. The first light source 27 is positioned opposite the first incident surface 10a of the first light guide section 10, the second light source 28 is positioned opposite the second incident surface 11a of the second light guide section 11, and the third light source 29 is positioned opposite the third incident surface 19a of the third light guide section 19. Light-emitting diodes (LEDs) are used as the first light source 27, the second light source 28, and the third light source 29.

[0044] In the vehicle lighting fixture 1 configured as described above, light is emitted simultaneously from the first light source 27, the second light source 28, and the third light source 29.

[0045] Light emitted from the first light source 27 enters the first light guide portion 10 of the first light guide body 7 from the first incident surface 10a, is guided longitudinally by the first light guide portion 10, is controlled by the first control step 14, and is emitted from the first emission surface 10b (see Figure 8). Light emitted from the first emission surface 10b is transmitted sequentially through the inner lens 6 and the cover 3 and irradiated outwards. Light transmitted through the inner lens 6 is diffused by the inner lens 6, and the diffused light is transmitted through the cover 3 and irradiated outwards.

[0046] In this case, if the parts of the first light guide 10 located to the left and right of the connecting part 12 are designated as the first part 10S, and the part located above the connecting part 12 between the first parts 10S is designated as the second part 10M, then the brightness of the light emitted from the first emission surface 10b changes with the light guide distance, so the light A emitted from the first part 10S has a higher brightness than the light B emitted from the second part 10M.

[0047] Furthermore, light emitted from the second light source 28 enters the second light guide portion 11 of the first light guide body 7 from the second incident surface 11a, is guided longitudinally by the second light guide portion 11, is controlled by the second control step 15, and is emitted from the second emission surface 11b. The light emitted from the second emission surface 11b is sequentially transmitted through the inner lens 6 and the cover 3 and irradiated outwards. The light transmitted through the inner lens 6 is diffused by the inner lens 6, and the diffused light is transmitted through the cover 3 and irradiated outwards.

[0048] In this case, if the parts of the second light guide 11 located to the left and right of the connecting part 12 are designated as the first part 11S, and the part located above the connecting part 12 and between the first parts 11S is designated as the second part 11M, then the brightness of the light emitted from the second emission surface 11b changes with the light guide distance, so the light C emitted from the first part 11S has a higher brightness than the light D emitted from the second part 11M.

[0049] Meanwhile, light emitted from the third light source 29 enters the third light guide portion 19 of the second light guide 8 from the third incident surface 19a and is guided longitudinally by the third light guide portion 19. At this time, the light is controlled by the third control step 21 of the third light guide portion 19, and the controlled light is emitted from the third exit surface 19b of the third light guide portion 19, passing through the connecting portion 12 of the first light guide 7, the inner lens 6, and the cover 3 in sequence, and is irradiated outwards. The light that passes through the inner lens 6 is diffused by the inner lens 6, and the diffused light passes through the cover 3 and is irradiated outwards.

[0050] In this case, if the parts of the third light guide 19 in which the third control step 21 is not formed are designated as the first part 19S, and the part between the first parts 19S in which the third control step 21 is formed is designated as the second part 19M, then no light is emitted from the first part 19S, and light E is emitted from the second part 19M and transmitted through the connecting part 12.

[0051] As described above, when light is emitted simultaneously from the first light source 27, the second light source 28, and the third light source 29, light A and light C are emitted from the first part 10S and the first part 11S, respectively, of the first light guide 7, and light B and light D, which have lower brightness than light A and light C, are emitted from the second part 10M and the second part 11M, respectively, and light E is emitted from the second part 19M of the second light guide 8 and is transmitted through the connecting part 12.

[0052] Therefore, in the vehicle lighting device 1, light A is emitted from above and light C is emitted from below in the left and right sides, light B, which has a lower brightness than light A, is emitted from above in the central part, light D, which has a lower brightness than light C, is emitted from below, and light E is emitted from the central part of the top and bottom.

[0053] This type of light irradiation results in light being emitted from a region of a certain width in the vertical direction (width direction) and uniform light being emitted in the horizontal direction (length direction).

[0054] In addition, although the above example shows a configuration in which the first light guide 7 is positioned in front of the second light guide 8, it is also possible to configure the first light guide 7 to be positioned behind the second light guide 8. However, by configuring the first light guide 7 to be positioned in front of the second light guide 8, the light emitted from the first emission surface 10b and the second emission surface 11b is emitted from in front of the light emitted from the third emission surface 19b, resulting in a configuration in which light with a higher intensity is emitted from the front, thereby improving the light emission efficiency.

[0055] As described above, in the vehicle lighting device 1, the first emission surface 10b, the third emission surface 19b, and the second emission surface 11b are positioned sequentially in the vertical direction, and the third end 21a of the third control step 21 is formed at a position further away from the light source than the first end 14a of the first control step 14 and the second end 15a of the second control step 15.

[0056] Therefore, light is emitted from the first emission surface 10b, the third emission surface 19b, and the second emission surface 11b, which are positioned sequentially in the vertical direction (width direction), and the position where the light is controlled by the third control step 21 is different in the light guide direction from the position where the light is controlled by the first control step 14 and the second control step 15.

[0057] As a result, the light-emitting area in the width direction is increased, and the positions of the light emitted from the first emission surface 10b, the second emission surface 11b, and the third emission surface 19b are different, so that a light-emitting area of ​​sufficient width can be secured while ensuring uniformity of the light.

[0058] Furthermore, a first light guide body 7 is provided, having a first light guide portion 10 and a second light guide portion 11. The first light guide portion 10 and the second light guide portion 11 are connected by a connecting portion 12, and the first light guide portion 10, the second light guide portion 11, and the connecting portion 12 are integrally formed as parts of the first light guide body 7.

[0059] Therefore, since the first light guide portion 10 and the second light guide portion 11 are provided as parts of the first light guide body 7, the number of parts in the vehicle lighting device 1 can be reduced and the structure can be simplified.

[0060] Furthermore, both end faces of the first light guide portion 10 in the light guide direction are formed as first incident surfaces 10a, both end faces of the second light guide portion 11 in the light guide direction are formed as second incident surfaces 11a, and both end faces of the third light guide portion 19 in the light guide direction are formed as third incident surfaces 19a.

[0061] Therefore, since light is incident on the first light guide section 10, the second light guide section 11, and the third light guide section 19 from both sides, the uniformity of light in the light guide direction can be further improved.

[0062] Furthermore, a first light source 27 that emits light toward the first incident surface 10a, a second light source 28 that emits light toward the second incident surface 11a, and a third light source 29 that emits light toward the third incident surface 19a are all mounted on the same substrate 26.

[0063] Therefore, since the three light sources are mounted on the same substrate 26, there is no need to provide a separate substrate for each of the three light sources, which reduces the number of parts and simplifies the structure of the vehicle lighting fixture 1.

[0064] In addition, the connecting portion 12 is formed in a flat plate shape, and the third control step 21 is located on the rear side of the connecting portion 12.

[0065] Therefore, since the light emitted from the third emission surface 19b, controlled by the third control step 21, is transmitted through the flat connecting portion 12, the light emitted from the third light guide portion 19 can be directed in the desired direction while ensuring high intensity of the first light guide 7 through the connecting portion 12.

[0066] As described above, the third control step 21 is positioned entirely behind the connecting portion 12, but both the left and right ends are positioned inward from the left and right ends of the connecting portion 12, and are not present behind the left and right ends 12a of the connecting portion 12 (see Figure 7).

[0067] This configuration makes it difficult for light emitted from the third emission surface 19b to reach the edges at both ends of the connecting section 12, thus reducing the likelihood of unintended refraction of light at the edges. Consequently, the light emitted from the third emission surface 19b is less likely to be directed in unintended directions, allowing the light to be directed in a predetermined and appropriate direction.

[0068] The above example shows a configuration in which two first parts 10S, two first parts 11S, and two first parts 19S are provided in the first light guide part 10, the second light guide part 11, and the third light guide part 19, respectively. However, in the vehicle lighting device 1, the present invention can also be applied to a configuration in which one first part 10S, one first part 11S, and one first part 19S are provided, and at least a part of the second part 10M, the second part 11M, and the second part 19M are provided. For example, the present invention can also be applied to a configuration in which one half of the left and right sides of the first light guide body 7 and the second light guide body 8 are provided. [Explanation of symbols]

[0069] 1. Vehicle lighting fixtures 7. First light guide 8. Second light guide 10 First light guide 10a First incident plane 10b First exit surface 11. Second light guide 11a Second incident plane 11b Second launch surface 12 Connecting part 12a end 14 First control step 14a First end 15 Second control step 15a Second end 19 Third light guide 19a Third incident plane 19b Third launch surface 21 Third control step 21a Third end 26 circuit boards 27 First light source 28. Second light source 29 The third light source

Claims

1. A first light guide unit having a first incident surface, a first control step, and a first exit surface, wherein light incident from the first incident surface is reflected by the first control step and exited from the first exit surface, A second light guide unit having a second incident surface, a second control step, and a second exit surface, wherein light incident from the second incident surface is reflected by the second control step and exited from the second exit surface, A third light guide unit having a third incident surface, a third control step, and a third exit surface, wherein light incident from the third incident surface is reflected by the third control step and exited from the third exit surface, The system comprises at least one light source that emits light toward the first incident surface, the second incident surface, and the third incident surface, The first ejection surface, the third ejection surface, and the second ejection surface are positioned sequentially in the vertical direction. The end on the light source side of the first control step is formed as the first end, The end of the second control step on the light source side is formed as the second end, The end of the third control step on the light source side is formed as the third end, The third end is formed at a position further away from the light source than the first and second ends. Vehicle lighting fixtures.

2. A first light guide body having the first light guide portion and the second light guide portion is provided. A second light guide having the third light guide portion is provided, The first light guide and the second light guide are connected by a connecting portion. The first light guide portion, the second light guide portion, and the connecting portion are integrally formed as parts of the first light guide body. A vehicle light fixture according to claim 1.

3. When the direction of light emission from the first and second light guides is considered to be forward, the first light guide is positioned in front of the second light guide. The vehicle lighting fixture according to claim 2.

4. Both end faces of the first light guide portion in the light guide direction are formed as the first incident surface, Both end faces of the second light guide portion in the light guide direction are formed as the second incident surface, Both end faces of the third light guide portion in the light guide direction are formed as the third incident surface. A vehicle light fixture according to claim 3.

5. The connecting portion is formed in a flat plate shape, The third control step is located on the rear side of the connecting portion. A vehicle light fixture according to claim 4.

6. The light source includes a first light source that emits light toward the first incident surface, a second light source that emits light toward the second incident surface, and a third light source that emits light toward the third incident surface. The first light source, the second light source, and the third light source are mounted on the same substrate. A vehicle light fixture according to claim 1, claim 2, claim 3, claim 4, or claim 5.

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