JP6201145B2 - Lighting device, lamp and vehicle - Google Patents

Description

  The present invention relates to a lighting device, a lamp, and a vehicle.

  FIG. 11A shows an exploded perspective view of a conventional lighting device, and FIG. 11B shows an enlarged cross-sectional view taken along a line including the optical axis of the light emitting element. A conventional illumination device (hereinafter referred to as “illumination device 1”) includes a substrate 3 on which a plurality of light emitting elements 2 are arranged, and a lens portion 4 on which a plurality of lens cuts corresponding to the light emitting elements 2 are applied. A space between the substrate 3 and the lens unit 4 is a closed space (see, for example, Patent Document 1 as a similar one).

Japanese Unexamined Patent Publication No. 60-130001

  The illuminating device 1 can collect the light of each light emitting element 2 by the lens cut and emit the light from the lens part by the lens part 4 having a plurality of lens cuts corresponding to the light emitting element 2.

  However, since the illumination device 1 has not communicated with the internal space of the illumination device 1 surrounded by the substrate 3 and the lens unit 4 and the external space, once moisture enters the internal space of the illumination device 1, the moisture is removed. Could not be released to the outside.

  If moisture remains in the internal space of the lighting device, the wiring of the light emitting element and the substrate may be deteriorated due to corrosion.

  In view of the above, an object of the lighting device, lamp, and vehicle according to the present invention is to prevent the light emitting element and the wiring of the substrate from being corroded and deteriorated by moisture that has entered the lighting device.

In order to solve the above-described problem, an illumination device according to the present invention includes a lens assembly having a first lens group, and a plurality of light emitting elements arranged to face each lens of the lens assembly, The lens assembly includes an exit surface of the lens and a non-lens surface portion that is a plane perpendicular to the optical axis of the light-emitting element, and the non -lens surface portion is located at a position separated from an outer peripheral end of the lens assembly. It has a through hole.

  In the illumination device according to the present invention, it is preferable that the through hole is adjacent to an exit surface of the lens of the first lens group.

  In the illumination device according to the present invention, the lens side of the through-hole has a portion parallel to the optical axis of the light emitting element or a portion inclined toward the optical axis side from a direction parallel to the optical axis. Is preferred.

  In the illumination device according to the present invention, it is preferable that the plurality of light emitting elements are mounted on a substrate, and the substrate is covered with the lens assembly.

  In the illumination device according to the present invention, the lens assembly may include the first lens group for passing mode illumination and a second lens group for traveling mode illumination adjacent to the first lens group. preferable.

  The lamp according to the present invention includes a housing having an opening, and the lighting device disposed in the housing.

  A vehicle according to the present invention includes a vehicle body and the lighting device.

  The illuminating device, the lamp, and the vehicle according to the present invention can suppress the corrosion deterioration of the light emitting element and the wiring of the substrate due to moisture that has entered the illuminating device.

1 is a front view of a vehicle according to a first embodiment of the present invention. The front side perspective view of the lamp which concerns on the 1st Embodiment of this invention Similarly rear perspective view of the lamp The front side perspective view which shows the state which similarly removed the cover of the lamp Similarly, a front view showing a state in which the cover of the lamp is removed Sectional view cut along line AA in FIG. Sectional view cut along line BB in FIG. Sectional view cut along line CC in FIG. The enlarged front view which shows the state which removed the cover of the lamp which concerns on the 1st Embodiment of this invention The expanded sectional view of the modification of the illuminating device which concerns on the 1st Embodiment of this invention. (A) An exploded perspective view of a conventional lighting device, (b) An enlarged cross-sectional view taken along a line including the optical axis of the light emitting element of the lighting device.

(First embodiment)
FIG. 1 shows a front view of a vehicle according to a first embodiment of the present invention. A vehicle 5 according to the first embodiment of the present invention (hereinafter referred to as “vehicle 5”) includes a vehicle body 6 and a lamp 7 according to the first embodiment of the present invention (hereinafter referred to as “lamp 7”). With.

  Hereinafter, including other embodiments, the traveling direction when the vehicle 5 moves forward is “front” or “front side”, and the opposite direction (opposite side) is “backward” or “rear side”. The right direction (right side) is “right direction” or “right side”, the opposite direction (opposite side) is “left direction” or “left side”, and the upward direction (upper side) when the vehicle 5 moves forward is “ In the following description, "upper" or "upper" and the opposite direction (opposite side) are referred to as "lower" or "lower".

  The vehicle 5 is a motorcycle, for example, and is driven by a gasoline engine.

  2 is a front perspective view of the lamp 7, FIG. 3 is a rear perspective view, FIG. 4 is a front perspective view showing a state where the cover 8 of the lamp 7 is removed, FIG. 5 is a front view, and FIG. FIG. 6 is a sectional view taken along line AA of FIG. 6, FIG. 7 is a sectional view taken along line BB of FIG. 5, and FIG. 8 is a sectional view taken along line CC of FIG. .

  As shown in FIGS. 4 and 5, the lamp 7 includes a housing 9 and an illumination device 10 (hereinafter, referred to as “illumination device 10”) according to the first embodiment of the present invention disposed inside the housing 9. Is provided. The lamp 7 is a headlamp for a motorcycle, for example, and is provided on the front side of the vehicle 5 so as to illuminate the front of the vehicle 5. The lamp 7 has, for example, a substantially disk shape.

  The housing 9 is, for example, a metal casing having a bottomed cylindrical shape, and has an opening 11 that emits light from the illumination device 10. As shown in FIG. 2, the opening 11 is covered with a cover 8. The cover 8 is made of, for example, a light-transmitting resin and transmits light from the lighting device 10. Further, since the cover 8 is provided so as to close the opening 11 of the housing 9, it is possible to prevent moisture and dust from entering the inside of the housing 9. The cover 8 has an arbitrary configuration in the lamp 7.

  As shown in FIG. 3, the housing 9 has a heat radiating portion 12 on the back side. By having the heat dissipating part 12, it is possible to easily dissipate heat generated during lighting of a light emitting element described later. The heat dissipating part 12 includes, for example, a plurality of heat dissipating fins 12a. As shown in FIG. 3, the radiation fins 12a are arranged in parallel in the left-right direction on the paper surface of FIG. The direction in which the radiating fins 12a are arranged is not particularly limited. However, by arranging the radiating fins 12a in a direction parallel to the vertical direction, the heat generated from the radiating fins 12a can be easily released upward. Can be improved.

  An insertion hole 13 for inserting a power supply line (not shown) for supplying power to the lighting device 10 is provided in the lower part on the back side of the housing 9. The insertion hole 13 is preferably sealed with packing or the like so that moisture or the like does not enter the lamp 7 in a state where the power supply line is inserted.

  As shown in FIGS. 4 to 6, the illumination device 10 includes a lens assembly 15 having a first lens group 14, and a plurality of light emitting elements 17 disposed to face the lenses 16 of the lens assembly 15. .

  The light emitting element 17 shown in FIG. 6 is a light emitting diode, for example. Specifically, an SMD (SURFACE MOUNT DEVICE) type in which one or more LED chips are mounted on a package substrate (not shown) is mounted on the substrate 18. The light emitting elements 17 shown in FIG. 6 and subsequent figures are of the SMD type and are so-called LED packages. When a light emitting diode is used as the light emitting element 17, a COB (CHIP ON BOARD) type in which one or more LED chips are mounted on the substrate 18 may be used.

  The light emitting diode may emit white light using a blue LED chip and a wavelength conversion member such as a phosphor, or white light using blue, red, and green LED chips. May be emitted.

  The first lens group 14 has a plurality of lenses 16. The lenses 16 have substantially the same structure, and are arranged so that their emission surfaces 16a are adjacent to each other. As shown in FIGS. 4 and 5, in the first lens group 14, for example, a total of nine lenses 16 of two and seven from the upper side to the lower side are arranged in a substantially parallel row. The first lens group 14 is for passing mode illumination, for example.

  As shown in FIG. 6, the lens 16 is a condensing lens whose exit surface 16a is a convex curved surface. Specifically, the lens 16 has a substantially semi-ellipsoidal shape in which the exit surface 16a is a convex curved surface and the entrance surface 16b is a flat surface.

  The light emitted from the light emitting element 17 enters the lens 16 from the incident surface 16b. The light incident from the incident surface 16b is collected by the output surface 16a and emitted. Thereby, the light for passing mode illumination can be emitted from the emission surface 16 a of the lens 16. In addition, since the light of passing mode illumination needs to suppress the light which goes upwards, it is preferable to design the shape of the exit surface 16a of the lens 16 so that the light emitted from the lens 16 is directed downward. For example, in a cross section parallel to the vertical direction including the optical axis of the light emitting element 17, the upward light can be obtained by making the curvature of the upper side of the exit surface 16 a of the lens 16 larger than the curvature of the lower side of the exit surface 16 a of the lens 16. Can be suppressed. In addition, you may provide the interruption | blocking part which interrupts | blocks the light which goes upwards from the output surface 16a of the lens 16, a reflection part etc. which reflect. These are possible by evaporating or pasting a material on or near the exit surface 16a of the lens 16.

  The lens assembly 15 has a through hole 19 in the non-lens surface portion 15a. Through the through hole 19, the space surrounded by the lens assembly 15 and the substrate 18 and the outer space communicate with each other. In the case where there is no through-hole 19, when moisture enters the space surrounded by the lens assembly 15 and the substrate, for example, during the assembly of the lighting device 10, the intruded moisture is not easily released from the space to the outside. End up. If moisture enters the space surrounded by the lens assembly 15 and the substrate 18, the moisture remains attached to the light emitting element 17 and the wiring of the substrate 18 and may be deteriorated by corrosion. There is. In particular, when a power supply line (not shown) led out from the substrate 18 is sandwiched between the lens assembly 15 and the like, moisture tends to accumulate particularly in that portion, which may cause corrosion.

  In particular, when a plurality of light emitting elements 17 are mounted on the substrate 18 and the substrate 18 is covered with the lens assembly 15, the airtightness of the space between the substrate 18 and the lens assembly 15 is increased. By providing the through hole 19 in the non-lens surface portion 15 a of the lens assembly 15, it is possible to easily release moisture that has entered between the substrate 18 and the lens assembly 15.

  Therefore, since the lens assembly 15 has the through-hole 19 in the non-lens surface portion 15a, even if moisture enters the space surrounded by the lens assembly 15 and the substrate 18, the moisture from the through-hole 19 to the external space. Since it can discharge | emit, degradation by corrosion of the wiring of the light emitting element 17 and the board | substrate 18, a feeder line, etc. can be suppressed.

  Here, the “non-lens surface 15a” may be any part of the lens assembly 15 other than the exit surface 16a of the lens 16, and the arrangement is not particularly limited.

  Note that a through hole 19 is preferably provided on the upper side of the lens 16 of the first lens group 14. Since the first lens group 14 is, for example, for passing mode illumination, it is preferable to reduce the light traveling upward from the lens 16. For example, as shown in FIG. 6, the through hole 19 is provided on the upper side of the lens 16, so that the emission surface 16 a is parallel to the optical axis direction of the light emitting element 17 or from the same direction on the upper side of the lens 16. Also, a bent portion 16d that is bent toward the light emitting element 17 side is formed. The light traveling upward from the lens 16 has the bent portion 16d, and therefore, when the light from the lens 16 is emitted from the exit surface 16a as compared with the case where there is no other bent portion 16d, the exit surface 16a. Since the angle of entering can be reduced, it is possible to transmit light from the light emitting element 17 through the lens 16 and refract the light toward the upper side as compared with the case where there is no bent portion 16d. Therefore, by providing the through-hole 19 on the upper side of the lens 16, light distribution suitable for passing mode illumination can be easily realized. That is, when the lens 16 is cut in a cross section parallel to the vertical direction including the center of the lens 16, the curvature of the upper side of the lens 16 in the exit surface 16 a of the lens 16 is the light emission of the exit surface 16 a of the lens 16. It has a portion larger than the curvature right above the element 17 (on the optical axis of the light emitting element 17). In other words, the lens 16 can easily realize light distribution suitable for the passing mode illumination by making the part exposed to the through hole 19 adjacent on the upper side a part of the lens 16.

  The through-hole 19 only needs to be adjacent to the exit surface 16a of the lens 16 of the first lens group 14. In this case, as described above, the light distribution of the lens 16 can be adjusted by the arrangement of the through holes 19.

In order to use the light emitted from the lens 16 of the first lens group 14 for the passing mode illumination, it is preferable to direct the upward light among the light incident on the lens 16 forward. In order to realize the light distribution without providing the through hole 19 adjacent to the lens 16, it is preferable to provide a flat portion or a portion inclined toward the light emitting element 17 on the upper side of the emission surface 16a of the lens 16. That is, it is preferable that the lens 16 side of the through hole 19 has a portion parallel to the optical axis of the light emitting element 17 or a portion inclined toward the light emitting element 17 from the direction parallel to the optical axis. As a molding method of the lens assembly 15, a mold on the exit surface 16 a side and the opposite side of the lens 16 is prepared, and after a material such as a resin is poured into the mold and hardened, the mold is removed from the lens assembly 15. Can be considered. However, the upper side of the exit surface 1 6 a of the lens 16, providing an inclined portion to the light emitting element 17 side, die-cutting of the emission surface 16a side of the lens 16 becomes impossible.

  Therefore, by providing the through hole 19 adjacent to the lens 16, the shape on the upper side of the exit surface 16a of the lens 16 can be manufactured with a mold on the opposite side to the exit surface 16a, and the die can be easily removed.

An enlarged front view showing a state in which the cover 8 of the lamp 7 is removed is shown in FIG. As shown in FIG. 9, in the outer peripheral portion 16 c of the lens 16, adjacent lenses 16 may overlap with each other except for a portion adjacent to the through hole 19 and an opposing portion thereof. In the region Q (region surrounded by the broken line) sandwiched between the portion adjacent to the through hole 19 of the outer peripheral portion 16c of the lens 16 and the opposite portion, a light distribution for passing mode illumination can be created. Other portions may have a shape in which the lenses 16 are overlapped. In this case, it is possible to reduce the area of the first lens group 1 4, the illumination device 10 can be miniaturized.

  4 to 7, the lens assembly 15 includes a first lens group 14 for passing mode illumination and a second lens group 20 for traveling mode illumination adjacent to the first lens group 14. It is preferable.

  The second lens group 20 has a plurality of lenses 21. The lenses 21 have substantially the same structure, and are arranged so that their emission surfaces are adjacent to each other. As shown in FIGS. 4 and 5, the second lens group 20 includes, for example, a total of 16 lenses 21 of 2, 5, 6, 3 from the upper side to the lower side. Has been.

As shown in FIG. 6, the lens 21 is a condensing lens having a flat portion on the emission surface 21a. Specifically, the lens 21 has a substantially frustoconical shape whose outer diameter increases from the light emitting element 17 side toward the emission surface 21a, and has a recess 21b on the opposite side of the emission surface. Recess 21b has a convex bottom surface 21c to the light emitting element 21 side, the side surface 21d which is formed to surround the bottom surface 21 c
And have. Further, a space between the opposite side of the bottom surface 21c of the side surface 21d and the emission surface 21a in the recess 21b is a parabolic surface 21e that swells outward.

  The light emitting element 17 is disposed to face each lens 21. Specifically, the light emitting element 17 is disposed at a position including the substantially central axis of each lens 21, and the light emitted from the light emitting element 21 is collected by each lens 21 and emitted.

  The light emitted from the light emitting element 17 enters the lens 21 from the bottom surface 21c or the side surface 21d of the recess 21b. Light incident from the bottom surface 21c is collected by the convex bottom surface 21c and emitted from the emission surface 21a. On the other hand, the light incident from the side surface 21d is condensed by being reflected by the parabolic surface 21e and emitted from the emission surface 21a. Thereby, the light for driving mode illumination can be radiate | emitted from the output surface 21a of the lens 21. FIG.

  Since the first lens group 14 and the second lens group 20 are integrally formed in the lens assembly 15, the lens assembly 15 does not have to be individually fixed to the light emitting element 17. 15 can be fixed together, and it is possible to suppress the occurrence of a shift in the light distribution due to a shift between the lenses 16 and 21 due to an external impact or the like.

  The lens assembly 15 has an outer wall portion 22 on the substrate 18 side so as to surround the first lens group 14 and the second lens group 20. The lens assembly 15 is made of acrylic resin, for example. The lens assembly 15 is not limited to acrylic resin but may be made of polycarbonate resin or the like. As shown in FIG. 6, it is preferable that the inner side of the front end portion 22a of the outer wall portion 22 is cut away. In this case, the substrate 18 and the lens assembly 15 can be easily aligned by fitting the substrate 18 into the notch 22b of the tip 22a.

  As shown in FIGS. 4 and 5, grooves 23 for inserting screws (not shown) for fixing the lens assembly 15 to the housing 9 are formed at four locations on the outer peripheral portion of the lens assembly 15. ing. In this case, the lens assembly 15 can be simply fixed to the housing 9 by screwing. Furthermore, it is preferable that the periphery of the groove 23 in the lens assembly 15 is recessed toward the substrate 18 with respect to the emission surfaces 16 a and 21 a of the lenses 16 and 21. In this case, when a screw is inserted into the groove 23, the screw head (not shown) is hidden in the recess 24 around the groove 23, so that the light emitted from the exit surfaces 16a and 21a of the lenses 16 and 21 is obstructed. Can be difficult.

  Further, it is preferable that a protrusion 25 that protrudes toward the substrate 18 is provided near the center of the lens assembly 15. In this case, the lens assembly 15 and the substrate 18 can be easily positioned by inserting the protruding portions 25 into the holes 18 a provided in the substrate 18. Further, when the positioning hole 9a is provided in the housing 9, the lens assembly 15 and the housing 9 can be easily positioned by inserting the protruding portion 25 into the positioning hole 9a.

  It should be noted that a hole 25 b may be provided in the tip end portion 25 a of the projecting portion 25 and the lens assembly 15 and the housing 9 may be screwed with a screw 26. In this case, it is possible to prevent the gap between the lens assembly 15 and the housing 9 from unnecessarily spreading.

  As described above, the illuminating device 10 according to the first embodiment of the present invention includes a lens assembly 15 having the first lens group 14 and a plurality of light emitting elements disposed to face each lens 16 of the lens assembly 15. Since the lens assembly 15 includes the through-hole 19 in the non-lens surface portion 15a, the wiring of the light-emitting element 17 and the substrate 18 is corroded and deteriorated by moisture that has entered the lighting device 10. Can be suppressed.

  The lamp according to the first embodiment of the present invention includes a housing 9 having an opening 11, a lighting device 10 disposed inside the housing 9, and a front cover 8 provided so as to close the opening 11. By providing, it can suppress that the wiring of the light emitting element 17 and the board | substrate 18 carries out corrosion deterioration by the water | moisture content which entered the illuminating device 10. FIG.

Furthermore, the vehicle 5 according to the first embodiment of the present invention includes the vehicle body 6 and the lighting device 10, so that the wiring of the light emitting element 17 and the substrate 18 is corroded by moisture that has entered the lighting device 10. Deterioration can be suppressed.
(Modification)
As described above, the present invention has been described based on the specific examples shown in the above-described embodiments, but the content of the present invention is not limited to the specific examples shown in the embodiments, and various lighting devices, lamps, and It can be applied to vehicles.
1. Lens Assembly The lens assembly 15 shown in FIGS. 4 to 8 has the first lens group 14 and the second lens group 20, but may have only the first lens group 14. Further, the first lens group 14 and other lenses, or the first lens group 14 and the second lens group 20 and other lenses may be provided.
2. About the driving mode illumination The lighting in the driving mode turns on the light emitting element 17 disposed facing the lens 21 of the second lens group 20 for the driving mode illumination, and the lens 16 of the first lens group 14 for the passing mode lighting. The light emitting element 17 arranged opposite to the light emitting element 17 may be turned off, or the light emitting element 17 arranged opposite to the lens 21 of the second lens group 20 for traveling mode illumination and the lens 16 of the first lens group 14 for passing mode illumination. Both the light emitting elements 17 arranged opposite to each other may be lit. In the illumination in the traveling mode, the light emitting element 17 disposed to face the lens 21 of the second lens group 20 for the traveling mode illumination and the light emitting element 17 disposed to face the lens 16 of the first lens group 14 for the passing mode illumination. Can be illuminated more widely, and when applied to the vehicle 5, the range that can be visually recognized during dark driving can be expanded.
3. Regarding the boundary between the first lens group and the second lens group As shown in FIG. 5, the boundary L (two-dot chain line) between the first lens group 14 and the second lens group 20 is the center of the lens assembly 15. It is preferable to provide outside P. In this case, the lens assembly 15 can be hardly damaged by impact or the like. The first lens group 14 and the second lens group 20 have different lenses 16 and 21, and the boundary L between the first lens group 14 and the second lens group 20 is the boundary between the lens 16 and the lens 21. Matches. Therefore, since the structures of the lenses 16 and 21 sandwiching the boundary are different at the boundary between the lens 16 and the lens 21 than at the boundary between the lenses 16 or 21, the strength tends to be weak. On the other hand, the load on the line segment including the center P of the lens assembly 15 is most likely to be applied when the lens assembly 15 receives an impact. Therefore, by providing the boundary between the different lenses 16 and 21 outside the center P of the lens assembly 15, even if the lens assembly 15 receives an impact or the like, the load on the portion of the lens assembly 15 where the strength is weakest is applied. The strength of the lens assembly 15 can be improved by providing it in a portion other than the easy portion.

  In particular, as shown in FIG. 6, when combining a lens 16 that is a condensing lens having a convex curved surface on the exit surface 16 a and a lens 21 that is a condensing lens having a flat exit surface 21 a, If the projections of the exit surfaces 16a and 21a are made to be aligned (in other words, the exit surface 16a is prevented from projecting more than the exit surface 21a), the outer peripheral portion 16c of the lens 16 is a substrate rather than the exit surface 21a of the lens 20. 18 side. In order to connect the lens 16 and the lens 21, it is conceivable to provide a wall 27 as shown in FIGS. For example, in the case of the lens assembly 15, the wall portion 27 is provided along the boundary L shown in FIG. Since the wall portion 27 has a fold between the lens 16 and the wall portion 27 of the lens assembly 15 and between the lens 21 and the wall portion 27, the strength is weak against a load that is bent with this portion as a fold. turn into. Therefore, by providing the wall portion 27 outside the center P of the lens assembly 15, it is possible to improve the strength of the lens assembly 15 by providing a portion having a weak strength in the lens assembly 15 other than a portion where the load is most easily applied. it can.

  In this case, when the wall portion 27 has a portion parallel to the line segment passing through the center P of the lens assembly 15, it is preferable that the wall portion 27 straddles the line segment passing through the center P in another portion. The wall portion 27 shown in FIG. 7 is a portion parallel to a line segment passing through the center P of the lens assembly 15. On the other hand, the wall portion 27 shown in FIG. 8 is a portion straddling a line segment passing through the center P of the lens assembly 15. As shown in FIGS. 7 and 8, the thickness d <b> 2 of the wall portion 25 of the portion straddling the line segment passing through the center P of the lens assembly 15 is a portion parallel to the line segment passing through the center P of the lens assembly 15. The wall portion 27 is thicker than the thickness d1. As a result, it is possible to improve the strength against the load applied with the line passing through the center P of the lens assembly 15 as a crease, and the strength of the lens assembly 15 can be further improved.

The boundary L preferably has a bent portion. In this case, as compared with the case where the boundary L is linear, it is possible to disperse the direction in which the strength is weakened, and thus the strength of the lens assembly 15 can be further improved.
3. Arrangement of the first lens group and the second lens group As shown in FIGS. 4 to 8, the arrangement of the first lens group 14 and the second lens group 20 is such that the first lens group 14 is on the lower side and the second lens group is arranged on the lower side. The group 20 is not limited to the one arranged on the upper side. For example, the first lens group 14 may be disposed on the left side, and the second lens group 15 may be disposed on the right side, or vice versa.

  For example, it is preferable that the first lens group 14 is disposed on the upper side and the second lens group 15 is disposed on the lower side. In this case, in the illumination in the traveling mode, the light emitting element 17 disposed to face the lens 16 of the first lens group 14 for the passing mode illumination and the lens 21 of the second lens group 20 for the traveling mode illumination are disposed. When both the light emitting elements 17 are turned on, it is difficult to form a gap between the light emitted from the first lens group 14 and the light emitted from the second lens group 20. Therefore, in the illumination in the traveling mode, it is possible to suppress the light distribution in front of the vehicle 5 from being separated and resulting in an unnatural light distribution.

Further, as shown in FIG. 5, the region of the second lens group 20 preferably includes the center P of the lens assembly 15. Since the traveling mode illumination requires a light amount more than the passing mode illumination, the lenses 16 and 21 can be easily arranged when more lenses 21 of the second lens group 20 are provided than the lenses 16 of the first lens group 14. can do.
4). Lens 21 of Second Lens Group 20 FIG. 10 is an enlarged cross-sectional view taken along the optical axis of the light emitting element 17 of a modified example (hereinafter referred to as “lens 28”) of the lens 21 of the first lens group 20 of the illumination device 10. Shown in The lens 28 has substantially the same configuration as the lens 21 except that the lens 28 is different from the lens 21 in that an exit surface-side recess 28b is provided at the center of the exit surface 28a of the lens 28.

The lens 28 is also a condensing lens having a portion with a flat exit surface 28a. Since the lens 28 has the exit surface side recess 28b, when the exit surface 28a is enlarged, the flat surface portion of the exit surface 28a is reduced by reducing the area of the flat portion compared to the case where the exit surface 27a is only a flat portion. Can be suppressed.
5. About lighting method In addition, it is preferable that the light distribution of the light radiate | emitted from the output surfaces 16a and 21a is set so that the lens 16 and 21 may correspond substantially. In this case, even when the light emitting element 17 facing one of the lenses 16 and 21 is turned off during lighting due to a problem or the like, it is possible to prevent the irradiation region from being lost.

Further, the light emitting element 17 facing the lenses 16 and 21 may be turned on or off step by step. In this case, the brightness of the irradiation region can be changed by simple control of turning on or off the light emitting element 17.
6). Arrangement of the light emitting element 17 When the light emitting element 17 is a substantially rectangular parallelepiped having a longitudinal direction and a short direction on its emission surface (not shown), the lens is arranged by arranging the longitudinal direction along the left-right direction. The light emitted from 16, 21 can be expanded in the left-right direction. In other words, the light emitted from the lenses 16 and 21 can be expanded in the horizontal direction by arranging the longitudinal direction of the light emitting element 19 along the direction (horizontal direction) substantially perpendicular to the vertical direction.

Moreover, the light emitted from the lenses 16 and 21 can be expanded in the vertical direction by arranging the light emitting element 17 so that the longitudinal direction thereof is along the vertical direction. In other words, by arranging the longitudinal direction of the light emitting element 17 along the vertical direction, the light emitted from the lenses 16 and 21 can be expanded in the vertical direction.
7). Regarding the lighting circuit A storage unit 29 for storing an electronic component (not shown) of a lighting circuit for lighting the light emitting element 17 may be provided between the lens assembly 15 and the substrate 18 on which the light emitting element 17 is mounted. Good. Specifically, the storage unit 29 is preferably provided at a position between the lens assembly 15 and the substrate 18 and does not hinder the light of the light emitting element 17. In this case, since it is not necessary to separately provide a part for storing the electronic components of the lighting circuit other than between the lens assembly 15 and the substrate 18, the lighting device 10 can be further downsized.

  The storage portion 29 is preferably provided below the light emitting element 17. In this case, the influence of the heat generated during lighting of the light emitting element 17 on the electronic components of the lighting circuit housed in the housing portion 28 can be reduced.

  The electronic component of the lighting circuit may be mounted on the substrate 18 on which the light emitting element 17 is mounted, or may be mounted on a substrate different from the substrate 18 on which the light emitting element 17 is mounted. When the electronic component of the lighting circuit is mounted on the substrate 18, it is not necessary to use another substrate different from the substrate 18, so that the wiring of the power supply line between the substrate and the substrate can be reduced. Further, when the electronic component of the lighting circuit is mounted on a substrate different from the substrate 18, it is possible to suppress the heat generated during lighting of the light emitting element 17 from being transmitted through the substrate 18.

Further, the portion corresponding to the storage portion 29 in the lens assembly 15 may be opaque. In this case, the electronic components of the lighting circuit stored in the storage unit 29 can be hidden from the emission surfaces 16a and 21a side, and the aesthetic appearance from the emission surfaces 16a and 21a side can be improved.
8). About the Lamp The lamp 7 is not limited to a substantially disk shape, but may be a cube shape or a rectangular parallelepiped shape.
9. About Vehicle The vehicle 5 is not limited to a two-wheeled vehicle, and may be a four-wheeled vehicle or a three-wheeled vehicle.

  As mentioned above, although the structure of this invention was demonstrated based on the said embodiment and modification, this invention is not restricted to the said embodiment and its modification. For example, the structure which combined suitably the said embodiment and the partial structure of the modification may be sufficient. In addition, the materials, numerical values, and the like described in the above embodiments are merely preferable examples and are not limited thereto. Furthermore, it is possible to appropriately change the configuration without departing from the scope of the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 5 Vehicle 6 Car body 7 Lamp 8 Front cover 9 Housing 10 Illumination device 14 1st lens group 15 Lens assembly 15a Non-lens surface part 16, 21 Lens 17 Light emitting element 18 Board | substrate 19 Through-hole 20 2nd lens group

Claims (8)

A lens assembly having a first lens group; and a plurality of light emitting elements arranged to face each lens of the lens assembly, wherein the lens assembly includes an exit surface of the lens, and a light emitting element of the light emitting element. And a non-lens surface portion that is a plane perpendicular to the optical axis, and the non-lens surface portion has a through hole at a position spaced from the outer peripheral end of the lens assembly .   The lighting device according to claim 1, wherein the through hole is adjacent to an emission surface of the lens of the first lens group. 3. The bent side of the lens according to claim 2, wherein the lens side of the through hole is formed with a bent portion whose emission surface is parallel to the optical axis direction of the light emitting element or bent toward the light emitting element side in the same direction. The lighting device described. Wherein the lens side of the through hole, to claim 2 or 3, characterized in that it has a portion which is inclined to the light emitting element side than in the direction parallel to the parallel portion or the optical axis to the optical axis of the light emitting element The lighting device described. The plurality of light emitting elements are mounted on a substrate,
The lighting device according to claim 1 , wherein the substrate is covered with the lens assembly .   6. The lens assembly according to claim 1, wherein the lens assembly includes the first lens group for passing mode illumination and the second lens group for traveling mode illumination adjacent to the first lens group. The lighting device according to claim 1.   A lamp comprising: a housing having an opening; and the lighting device according to any one of claims 1 to 6 disposed inside the housing.   A vehicle comprising a vehicle body and the lighting device according to any one of claims 1 to 6.

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