CN112443812B - Steering signal lamp - Google Patents

Steering signal lamp Download PDF

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Publication number
CN112443812B
CN112443812B CN202010811871.7A CN202010811871A CN112443812B CN 112443812 B CN112443812 B CN 112443812B CN 202010811871 A CN202010811871 A CN 202010811871A CN 112443812 B CN112443812 B CN 112443812B
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CN
China
Prior art keywords
light
internal reflection
lamp
turn signal
incident
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Active
Application number
CN202010811871.7A
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Chinese (zh)
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CN112443812A (en
Inventor
渡边智之
小林佑太郎
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Koito Manufacturing Co Ltd
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Koito Manufacturing Co Ltd
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Publication of CN112443812A publication Critical patent/CN112443812A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/10—Protection of lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F21W2107/13—Use or application of lighting devices on or in particular types of vehicles for land vehicles for cycles
    • F21W2107/17—Use or application of lighting devices on or in particular types of vehicles for land vehicles for cycles for motorcycles

Abstract

The invention provides a turn signal lamp capable of improving notification function and inhibiting enlargement. A turn signal lamp (1) has a plurality of lamp units (20 a, 20b, 20 c) each having a light source (30 a, 30b, 30 c) and a lens (40 a, 40b, 40 c) having an incident portion (40 i), a 1 st internal reflection portion (51), a 1 st emission portion (61), and a 2 nd emission portion (62), into which light emitted from the light source is incident, the 1 st emission portion emits a part of the light in a direction not parallel to the vertical direction, the 1 st internal reflection portion internally reflects another part of the light toward the 2 nd emission portion, the 2 nd emission portion emits at least a part of the light internally reflected by the 1 st internal reflection portion toward the road surface, and the plurality of lamp units each draw a predetermined drawing image (71 a, 71b, 71 c) on the road surface, the drawing images drawn to the road surface being arranged in a direction away from the vehicle.

Description

Steering signal lamp
Technical Field
The present invention relates to turn signal lights.
Background
As a vehicle lamp, a turn signal lamp is known that notifies the surroundings of a vehicle of an operation such as turning right and left of the vehicle. Patent document 1 below discloses a vehicle having a turn signal lamp and a road surface drawing lamp that draws a predetermined drawing image on a road surface, the road surface drawing lamp drawing the predetermined drawing image on the road surface in conjunction with turning on the turn signal lamp.
Patent document 1: international publication No. 2019/044404
In the vehicle of patent document 1, a predetermined drawing image is drawn on a road surface in association with the turning on of a turn signal lamp, and therefore, the notification function can be improved. In addition, the turn signal lamp may have a plurality of lamp units that emit light, and it is desired to integrate the turn signal lamp and the road surface drawing lamp as described above, and to improve the notification function of the turn signal lamp. However, there is a concern that the turn signal lamp is made larger by integrating the turn signal lamp and the road surface drawing lamp.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a turn signal lamp capable of improving a notification function and suppressing an increase in size.
In order to achieve the above object, a turn signal lamp according to the present invention includes a plurality of lamp units including a light source and a lens, the lens including an incident portion, a 1 st internal reflection portion, a 1 st emission portion, and a 2 nd emission portion, light emitted from the light source being incident on the incident portion, the 1 st emission portion emitting a portion of light incident on the incident portion in a direction not parallel to a vertical direction, the 1 st internal reflection portion internally reflecting another portion of light incident on the incident portion toward the 2 nd emission portion, the 2 nd emission portion emitting at least a portion of light internally reflected by the 1 st internal reflection portion toward a road surface, the plurality of lamp units each drawing a predetermined drawing image on the road surface by light emitted from the 2 nd emission portion, the drawing images drawn on the road surface by the plurality of lamp units being arranged in a direction away from a vehicle.
In this turn signal lamp, the plurality of lamp units emit light in directions not parallel to the vertical direction and on the road surface, and a predetermined drawing image is drawn on the road surface by the light emitted toward the road surface. Therefore, in the turn signal lamp, the light emitted in the direction not parallel to the vertical direction and the drawing image drawn on the road surface can notify the surroundings of the vehicle of the operation of the vehicle. Therefore, the turn signal lamp can improve the notification function as compared with a case where the drawing image is not drawn on the road surface. In this turn signal lamp, the drawing image drawn to the road surface by each of the plurality of lamp units is arranged in a direction away from the vehicle. Therefore, the turn signal lamp can improve the visibility of the drawing images from the front and rear of the vehicle, and can improve the notification function, as compared with a case where the drawing images are arranged along the side of the vehicle, for example. In this turn signal lamp, the light source for emitting light in a direction not parallel to the vertical direction and the light source for drawing a drawing image are shared by the lamp units, and the lens for emitting light in a direction not parallel to the vertical direction and the lens for drawing a drawing image are shared by the lamp units. Therefore, even if the turn signal has a plurality of lamp units, the turn signal can be prevented from becoming large.
The total amount of light emitted from the 2 nd emission portion of each of the plurality of lamp units may be larger as the drawing image is farther from the lamp unit of the vehicle.
Typically, light is transmitted in a divergent manner. Therefore, the drawing image tends to be darker as it is farther from the vehicle. However, in this turn signal lamp, as described above, as for the total amount of light emitted from the 2 nd emission portion of each of the plurality of lamp units, the farther the drawing image is from the lamp unit of the vehicle, the greater the total amount of light. Therefore, the turn signal lamp can make it difficult for a difference to occur in brightness of a drawing image drawn by each of the plurality of lamp units.
The lenses in the plurality of lamp units may be integrally formed with each other.
By adopting the above configuration, the number of components can be reduced.
The 1 st emission portion may diffuse and emit the part of the light incident on the incident portion.
With the above configuration, even if the total amount of light emitted from the light source is increased, the brightness in the 1 st emission portion can be suppressed from being brighter than the predetermined threshold. Therefore, the turn signal lamp can make the drawn image brighter while suppressing the brightness in the 1 st emission portion from becoming brighter than the predetermined threshold value.
The lens may further include a 2 nd internal reflection portion that internally reflects the other portion of the light incident on the incident portion toward the 1 st internal reflection portion, and a back-off surface connected to an outer edge of the 2 nd internal reflection portion, and the back-off surface may extend from the connecting portion toward a side opposite to the incident portion so as to overlap the 2 nd internal reflection portion in a direction parallel to a transmission direction of the light transmitted from the incident portion toward the connecting portion of the 2 nd internal reflection portion and the back-off surface.
In this turn signal lamp, as described above, the escape surface is connected to the outer edge of the 2 nd internal reflection portion. The escape surface extends from the connection portion to the side opposite to the incidence portion so as to overlap the 2 nd internal reflection portion in a direction parallel to a transmission direction of light transmitted from the incidence portion to the connection portion between the 2 nd internal reflection portion and the escape surface. Since the light is transmitted in the lens in a straight line, the light entering the incident portion is less likely to enter the retracted surface than when the retracted surface is not overlapped with the 2 nd internal reflection portion in a direction parallel to the transmission direction of the light transmitted from the incident portion toward the connection portion between the 2 nd internal reflection portion and the retracted surface. That is, the outer edge of the 2 nd internal reflection portion is connected to a back-off surface where light entering the incident portion is difficult to enter. Therefore, the turn signal lamp can suppress light transmitted from the incident portion toward the periphery of the 2 nd internal reflection portion from being internally reflected at the periphery of the 2 nd internal reflection portion and emitting light in an unexpected direction, compared to a case where the escape surface does not overlap with the 2 nd internal reflection portion in a direction parallel to the transmission direction of light transmitted from the incident portion toward the connection portion of the 2 nd internal reflection portion and the escape surface.
The number of the plurality of lamp units may be 3 or more, and the plurality of lamp units may be arranged side by side from the center side toward the outer side of the vehicle.
In this case, the plurality of lamp units may emit light from the light source sequentially from the lamp unit located on the center side of the vehicle, and the drawing image drawn on the road surface by each of the plurality of lamp units may be closer to the vehicle as the lamp unit located on the center side of the vehicle.
With the above configuration, the turn signal lamp can be turned on so as to appear to flow as light, and a moving image which appears to flow as light can be drawn on the road surface.
ADVANTAGEOUS EFFECTS OF INVENTION
As described above, according to the present invention, it is possible to provide a turn signal lamp capable of improving a notification function and suppressing an increase in size.
Drawings
Fig. 1 is a plan view schematically showing a vehicle having a turn signal lamp according to embodiment 1 of the present invention.
Fig. 2 is a front view schematically showing the turn signal lamp shown in fig. 1.
Fig. 3 is an exploded perspective view of the turn signal lamp shown in fig. 1.
Fig. 4 is a cross-sectional view of the turn signal lamp of fig. 2 at line IV-IV.
Fig. 5 is an enlarged view of a portion including 1 lens in fig. 4.
Fig. 6 is a cross-sectional view of the turn signal lamp of fig. 2 at line VI-VI.
Fig. 7 is a rear view schematically showing 3 lenses.
Fig. 8 is a front view schematically showing 3 lenses.
Fig. 9 is a diagram for explaining a drawing image drawn on a road surface in embodiment 1.
Fig. 10 is a diagram for explaining a drawing image drawn on a road surface in embodiment 2.
Description of the reference numerals
1 turn signal lamp
20a, 20b, 20c lamp unit
30a, 30b, 30c light source
40a, 40b, 40c lens
40i incident portion
41. 1 st incident portion
42 & gt2 & lt/2 & gt incident portion
51 st internal reflection part 1 st
52/2 nd internal reflection part
53. 3 rd internal reflection portion
54 th internal reflection part
55. 1 st back-off plane
61. 1 st exit portion
62. 2 nd emission portion
63 rd exit part
64 th exit section
Detailed Description
The following describes an exemplary embodiment of a turn signal lamp according to the present invention, together with the drawings. The embodiments illustrated below are embodiments for facilitating understanding of the present invention, and are not intended to limit the embodiments of the present invention. The present invention can be modified and improved according to the following embodiments without departing from the gist thereof. In the drawings referred to below, the dimensions of the respective components may be changed to show them, or reference numerals may be omitted, in order to facilitate understanding.
(embodiment 1)
Fig. 1 is a plan view schematically showing a vehicle having a turn signal lamp according to embodiment 1 of the present invention. The turn signal lamp 1 of the present embodiment is used as a turn signal lamp for the front of a motorcycle. As shown in fig. 1, a vehicle 100 has turn signal lamps 1 on the left and right sides of the front portion, respectively. The turn signal lamps 1 provided on the left and right sides of the front portion of the vehicle 100 are symmetrical in the left-right direction. Therefore, the turn signal lamp 1 provided on the left side of the front portion of the vehicle 100 is described below, and the description thereof is appropriately omitted with respect to the turn signal lamp 1 provided on the right side of the front portion of the vehicle 100. The right and left are the right and left sides when the vehicle 100 is viewed from the front.
Fig. 2 is a front view schematically showing the turn signal lamp 1 shown in fig. 1, and is a front view schematically showing the turn signal lamp 1 provided on the left side of the front portion of the vehicle 100. Fig. 3 is an exploded perspective view of the turn signal lamp 1 shown in fig. 1, and is an exploded perspective view of the turn signal lamp 1 from the front obliquely upward. Fig. 4 is a cross-sectional view of the turn signal lamp 1 at the line IV-IV of fig. 2, and is a cross-sectional view of the turn signal lamp 1 in the horizontal direction. As shown in fig. 2, 3, and 4, the turn signal lamp 1 has a main structure including a housing 10, a circuit board 15, and a plurality of lamp units 20a, 20b, and 20c.
The housing 10 includes a lamp housing 11 and a translucent cover 12 as main components. The lamp housing 11 is formed in a rectangular box shape in the left-right direction, and openings are formed in the front and right side portions of the lamp housing 11. The cover 12 is fixed to the lamp housing 11 such that an opening of a front portion of the lamp housing 11 is blocked, and a right side portion of the lamp housing 11 is fixed to a main body portion of the vehicle 100. Thus, the right side portion of the lamp housing 11 is located on the center side of the vehicle 100, and the left side portion of the lamp housing 11 is located on the outer side of the vehicle. The space formed by the lamp housing 11 and the cover 12 is a lamp room R, and the circuit board 15 and the plurality of lamp units 20a, 20b, 20c are accommodated in the lamp room R.
In the present embodiment, the number of the plurality of lamp units 20a, 20b, 20c is set to 3. The lamp units 20a, 20b, and 20c have the same configuration and are arranged side by side in the left-right direction. The lamp unit 20a is disposed on the center side of the vehicle 100 as compared to the lamp unit 20b, the lamp unit 20c is disposed on the outer side of the vehicle 100 as compared to the lamp unit 20b, and the lamp unit 20b is disposed between the lamp unit 20a and the lamp unit 20c. Therefore, these lamp units 20a, 20b, 20c can be understood as being juxtaposed from the center side toward the outer side of the vehicle 100.
The lamp unit 20a has a light source 30a and a lens 40a. The light source 30a is a light emitting element that emits light, and in the present embodiment, is a surface mount type LED (Light Emitting Diode) that emits orange light while an emission surface that emits light is substantially quadrangular. The light source 30a is mounted on the circuit board 15. The optical axis 31a of the light source 30a extends in a direction substantially perpendicular to the circuit board 15, and is not parallel to the vertical direction. The optical axis 31a of the present embodiment extends substantially horizontally and forward.
The lens 40a is disposed in front of the light source 30a such that the optical axis 31a of the light source 30a passes through the lens 40a, and light emitted from the light source 30a enters the lens 40a. As will be described later in detail, the lens 40a is configured to emit a part of the incident light to the front side opposite to the light source 30a side, and to emit another part of the incident light to the lower side.
The lamp unit 20b has a light source 30b and a lens 40b, and the lamp unit 20c has a light source 30c and a lens 40c. The light sources 30b and 30c are light emitting elements that emit light, and in the present embodiment, are surface mount LEDs that emit orange light while having a substantially quadrangular emission surface on which light is emitted, as in the case of the light source 30 a. The light source 30b and the light source 30c are mounted on the circuit board 15. Therefore, 3 light sources 30a, 30b, 30c are mounted on 1 circuit board 15. The light sources 30a, 30b, and 30c may be mounted on different circuit boards. The optical axis 31b of the light source 30b and the optical axis 31c of the light source 30c extend in a direction substantially perpendicular to the circuit board 15. In the present embodiment, the optical axes 31b and 31c are substantially parallel to the optical axis 31a of the light source 30a, and extend forward. The optical axes 31a, 31b, and 31c may be non-parallel to each other as long as they are not parallel to the vertical direction.
The lens 40b is disposed in front of the light source 30b such that the optical axis 31b of the light source 30b passes through the lens 40b, and light emitted from the light source 30b enters the lens 40b. The lens 40c is disposed in front of the light source 30c such that the optical axis 31c of the light source 30c passes through the lens 40c, and light emitted from the light source 30c enters the lens 40c. The lenses 40b and 40c are configured to emit a part of the incident light to the front side opposite to the light sources 30b and 30c, and to emit the other part of the incident light to the lower side, as in the lens 40 a.
In the present embodiment, 3 lenses 40a, 40b, 40c are integrally formed with each other via a connection plate 40d. As shown in fig. 3, a plurality of bosses 40e extending toward the light sources 30a, 30b, 30c are provided on the surface of the connection plate 40d on the light sources 30a, 30b, 30c side. The front end portions of the bosses 40e are fitted into through holes 15h formed in the circuit board 15, and the 3 lenses 40a, 40b, 40c are fixed to the circuit board 15. The circuit board 15 is fixed to the lamp housing 11 by a structure not shown. Further, a plurality of substantially quadrangular pyramid-shaped protrusions 40f are formed without gaps on the surface of the connection plate 40d on the opposite side to the light sources 30a, 30b, 30c side. The shape of the projections 40f is not particularly limited, and for example, the projections 40f may be formed in a substantially triangular pyramid shape. The projections 40f may be formed on a part of the connection plate 40d or may not be formed on the connection plate 40d.
Next, the structure of these lenses 40a, 40b, 40c will be described in detail. Fig. 5 is an enlarged view of a portion including 1 lens 40b in fig. 4, and is a view showing a part of a horizontal cross section of the turn signal lamp 1 passing through the optical axis 31b of the light source 30 b. Fig. 6 is a cross-sectional view of the turn signal lamp 1 taken along line VI-VI of fig. 2, and is a vertical cross-sectional view of the turn signal lamp 1 taken through the optical axis 31b of the light source 30 b. In fig. 6, the rear portion of the lamp housing 11 is not shown. Fig. 7 is a rear view schematically showing 3 lenses 40a, 40b, 40c, and is a view of these lenses 40a, 40b, 40c from the light sources 30a, 30b, 30c side. In the present embodiment, the lenses 40a, 40b, and 40c have the same configuration. Therefore, the lens 40b will be described below, and the descriptions of the lenses 40a and 40c will be omitted appropriately.
In the present embodiment, the lens 40b in a cross section passing through the optical axis 31b has a substantially M-shape. The lens 40b has an incident portion 40i, a 2 nd internal reflection portion 52, a 3 rd internal reflection portion 53, a 1 st retracted surface 55, and a 2 nd retracted surface 56 on a rear surface of the light source 30 b. The lens 40b has a 1 st internal reflection portion 51, a 4 th internal reflection portion 54, a 1 st emission portion 61, a 2 nd emission portion 62, a 3 rd emission portion 63, and a 4 th emission portion 64 on a front surface opposite to the light source 30b side.
The incident portion 40i is a portion into which light emitted from the light source 30b is incident. As shown in fig. 5 and 6, in the present embodiment, the incident portion 40i is constituted by the 1 st incident portion 41 and the 2 nd incident portion 42. A part of the light emitted from the light source 30b enters the 1 st incident portion 41, and another part of the light emitted from the light source 30b enters the 2 nd incident portion 42. The 1 st incident portion 41 intersects the optical axis 31b of the light source 30 b. The 1 st incident portion 41 in the case where the lens 40b is viewed from the light source 30b side along the optical axis 31b is formed in a substantially circular shape centered on the optical axis 31 b. The 1 st incident portion 41 is curved in a concave shape to the opposite side to the light source 30b side. As shown in fig. 7, the 1 st incident portion 41 is formed of a plurality of lenses curved in a concave shape toward the side opposite to the light source 30b side. The 1 st incident portion 41 may be formed of a single curved surface or a flat surface, or may be formed of a single curved surface curved in a concave shape toward the side opposite to the light source 30b side.
As shown in fig. 5 and 6, the 2 nd incidence portion 42 extends from the entire periphery of the outer edge 41e of the 1 st incidence portion 41 toward the light source 30b side and away from the optical axis 31 b. Therefore, the 2 nd incidence portion 42 is located around the 1 st incidence portion 41 when the lens 40b is viewed from the light source 30b side along the optical axis 31b, and the 2 nd incidence portion 42 is formed in a substantially annular shape centering on the optical axis 31b when viewed in the above-described manner. The 2 nd incidence portion 42 is connected to the 1 st incidence portion 41, and the entire 2 nd incidence portion 42 is located on the light source 30b side with respect to the 1 st incidence portion 41 in a direction parallel to the optical axis 31 b. The outer edge 41e of the 1 st incident portion 41 of the 2 nd incident portion 42 and the outer edge 42e of the 2 nd incident portion 42, which is the edge on the 1 st incident portion 41 side, are curved in a convex shape toward the light source 30b side with reference to a straight line connecting the outer edge 41e of the 1 st incident portion 41 and the outer edge 42e of the 2 nd incident portion 42, which is the edge on the opposite side of the 1 st incident portion 41 side. Further, the portion between the outer edge 41e and the outer edge 42e of the 2 nd incident portion 42 may be curved in a concave shape toward the side opposite to the light source 30b side with respect to the straight line. As shown in fig. 7, the 2 nd incidence portion 42 is constituted by a 1 st region 42a and a 2 nd region 42b, the 1 st region 42a is constituted by a plurality of curved surfaces arranged in the circumferential direction with respect to the optical axis 31b, and the 2 nd region 42b is constituted by a single curved surface located below the optical axis 31 b. The 1 st region 42a may be formed of a single curved surface, and the 2 nd region 42b may be formed of a plurality of curved surfaces arranged in the circumferential direction with respect to the optical axis 31 b.
As shown in fig. 6, the 2 nd internal reflection portion 52 is a portion that internally reflects a part of the light emitted from the light source 30b and entering the incident portion 40i toward the 1 st internal reflection portion 51 described later. In the present embodiment, the 2 nd internal reflection portion 52 is located below the optical axis 31b, and internally reflects a part of the light entering the 2 nd region 42b of the 2 nd incidence portion 42 in the incidence portion 40i toward the front. The 2 nd internal reflection portion 52 extends from the 2 nd incidence portion 42 toward the opposite side from the light source 30b side on the outer peripheral side with respect to the optical axis 31b so as to be away from the optical axis 31 b. The 2 nd internal reflection portion 52 is formed of a single substantially flat surface. The 2 nd internal reflection portion 52 may be formed of a single curved surface, or may be formed of a plurality of curved surfaces or a plurality of flat surfaces. As shown in fig. 7, when the lens 40b is viewed from the light source 30b side along the optical axis 31b, the 2 nd region 42b of the 2 nd incidence portion 42 is located between the 1 st incidence portion 41 and the 2 nd internal reflection portion 52.
As shown in fig. 6, the 1 st escape surface 55 is a surface connected to the outer edge of the 2 nd internal reflection portion 52. The 1 st escape surface 55 of the present embodiment is connected to a lower outer edge 52e of the 2 nd internal reflection portion 52, and extends downward in parallel with the substantially vertical direction from the outer edge 52 e. The 1 st escape surface 55 overlaps the 2 nd internal reflection portion 52 in a direction parallel to a transmission direction of the light LR emitted from the light source 30b and transmitted from the 2 nd incidence portion 42 of the incidence portion 40i toward the outer edge 52e which is a connection portion between the 2 nd internal reflection portion 52 and the 1 st escape surface 55. That is, it can be understood that the 1 st escape surface 55 extends from the outer edge 52e to the opposite side from the incident portion 40i so as to overlap the 2 nd internal reflection portion 52 in the direction parallel to the transmission direction of the light LR transmitted from the incident portion 40i to the outer edge 52 e. The light LR shown in fig. 6 is emitted from the intersection point of the light emitting surface of the light source 30b and the optical axis 31 b. The 1 st retreat surface 55 is located on the light source 30b side from the connection plate 40d in a direction parallel to the optical axis 31 b. The 1 st escape surface 55 is formed of a single substantially flat surface. The 1 st escape surface 55 may be a single curved surface, or may be a surface composed of a plurality of curved surfaces or a plurality of flat surfaces.
As shown in fig. 5 and 6, the 3 rd internal reflection portion 53 is a portion that internally reflects a part of the light emitted from the light source 30b and incident on the incident portion 40i toward the 3 rd emission portion 63 described later, and internally reflects another part of the light emitted from the light source 30b and incident on the incident portion 40i toward the 4 th internal reflection portion 54 described later. In the present embodiment, the 3 rd internal reflection portion 53 internally reflects a part of the light entering the 2 nd incidence portion 42 of the incidence portion 40i to the side opposite to the light source 30b side. The 3 rd internal reflection portion 53 extends on the outer peripheral side with respect to the optical axis 31b than the 2 nd incidence portion 42 so as to be away from the optical axis 31b toward the opposite side from the light source 30b side. As shown in fig. 7, when the lens 40b is viewed from the light source 30b side along the optical axis 31b, the incident portion 40i is sandwiched by the 3 rd internal reflection portion 53 in the left-right direction. The 3 rd internal reflection portion 53 is constituted by a plurality of curved surfaces arranged in the radial direction with respect to the optical axis 31 b. These curved surfaces extend along an arc centered on the optical axis 31b and curve concavely toward the optical axis 31 b. The 3 rd internal reflection portion 53 may be formed of a single curved surface or may be formed of a plurality of flat surfaces.
As shown in fig. 5 and 7, the 2 nd retracted surface 56 extends in a direction substantially perpendicular to the optical axis 31b on the outer peripheral side with respect to the optical axis 31b of the incident portion 40 i. When the lens 40b is viewed from the light source 30b side along the optical axis 31b, the 2 nd retreat surface 56 is surrounded by the 3 rd internal reflection portion 53. In the present embodiment, the surface of the lens 40b on the light source 30b side has 3 2 nd retracted surfaces 56. When viewed in the above manner, the 2 nd retracted surface 56 is located on the right side of the optical axis 31b, that is, on the center side of the vehicle 100 with respect to the optical axis 31 b. When viewed in the above manner, the 2 nd relief surfaces 56 extend along an arc having the optical axis 31b as a center, and are arranged in the radial direction with respect to the optical axis 31 b.
Fig. 8 is a front view schematically showing 3 lenses 40a, 40b, 40c, and is a view of these lenses 40a, 40b, 40c from the side opposite to the side of the light sources 30a, 30b, 30 c. As shown in fig. 6 and 8, the 1 st internal reflection portion 51 is a portion that internally reflects a part of the light entering the incident portion 40i toward a 2 nd emission portion 62 described later. In the present embodiment, the 1 st internal reflection portion 51 is located below the optical axis 31b, and internally reflects a part of the light that enters the 2 nd incidence portion 42 of the incidence portion 40i and is internally reflected by the 2 nd internal reflection portion 52 in a direction away from the optical axis 31 b. When the lens 40b is viewed along the optical axis 31b from the opposite side to the light source 30b side, the 1 st internal reflection portion 51 is located on the outer peripheral side with respect to the optical axis 31b than the 1 st emission portion 61 described later. The 1 st internal reflection portion 51 is located on the opposite side of the 1 st emission portion 61, the 2 nd internal reflection portion 52, and the 1 st escape surface 55 from the light source 30b side in the direction parallel to the optical axis 31 a. The 1 st internal reflection portion 51 extends away from the optical axis 31b toward the opposite side from the light source 30b side. The 1 st internal reflection portion 51 is constituted by a single substantially flat surface. The 1 st internal reflection portion 51 may be formed of a single curved surface, or may be formed of a plurality of curved surfaces or a plurality of flat surfaces.
The 1 st emission portion 61 is a portion that emits a part of the light emitted from the light source 30b and incident on the incident portion 40i in a direction not parallel to the vertical direction. In the present embodiment, the 1 st emission portion 61 intersects the optical axis 31b, and emits a part of the light entering the 1 st incidence portion 41 of the incidence portion 40i toward the front side which is the opposite side to the light source 30b side. The 1 st emission portion 61 in the case where the lens 40b is viewed from the side opposite to the light source 30b along the optical axis 31b has a substantially elliptical shape elongated in the left-right direction about the optical axis 31 b. The 1 st emission portion 61 is curved in a convex shape to the opposite side to the light source 30b side. The 1 st emission portion 61 has a central portion formed of a curved surface extending in the left-right direction toward the light source 30b side and curved in a concave shape, and the central portion intersects the optical axis 31 b. The outer peripheral portion of the 1 st emission portion 61 is formed of a plurality of curved surfaces arranged in the radial direction with respect to the optical axis 31 b. These curved surfaces extend in a ring shape centering on the optical axis 31b and curve concavely toward the optical axis 31 b. That is, the 1 st emission portion 61 is formed of a plurality of curved surfaces curved in a concave shape toward the optical axis 31 b. The 1 st emission portion 61 may be formed of a single curved surface or may be formed of a plurality of flat surfaces.
The 2 nd emission portion 62 is a portion that emits at least a part of the light internally reflected by the 1 st internal reflection portion 51 toward the road surface. The details will be described later, and the light emitted from the 2 nd emission portion 62 irradiates the road surface, and a predetermined drawing image is drawn on the road surface. As shown in fig. 6, in the present embodiment, the 2 nd emission portion 62 is located below the 1 st internal reflection portion 51 in a cross section passing through the optical axis 31b, and extends toward the opposite side from the light source 30b side so as to approach the optical axis 31 b. The 2 nd emission portion 62 is located on the opposite side of the 1 st emission portion 61, the 2 nd internal reflection portion 52, and the 1 st escape surface 55 from the light source 30b side in the direction parallel to the optical axis 31 a. In addition, the 2 nd emission portion 62 overlaps the 1 st escape surface 55 in a direction parallel to the transmission direction of the light transmitted from the 2 nd internal reflection portion 52 toward the 1 st internal reflection portion 51. As shown in fig. 8, when the lens 40b is viewed along the optical axis 31b from the opposite side to the light source 30b side, the 2 nd emission portion 62 is located on the outer peripheral side with respect to the optical axis 31b than the 1 st internal reflection portion 51. The 2 nd emission portion 62 is formed of a single substantially flat surface, and is inclined so as to incline upward from the center side of the vehicle 100 toward the outer side of the vehicle. The 1 st internal reflection portion 51 may be formed of a single curved surface, or may be formed of a plurality of curved surfaces or a plurality of flat surfaces.
The 3 rd emission portion 63 is a portion that emits a part of the light internally reflected by the 3 rd internal reflection portion 53 in a direction not parallel to the vertical direction. In the present embodiment, the 3 rd emission portion 63 emits a part of the light internally reflected by the 3 rd internal reflection portion 53 toward the front side which is the opposite side to the light source 30b side. As shown in fig. 8, when the lens 40b is viewed along the optical axis 31a from the opposite side to the light source 30b side, the 3 rd emission portion 63 is located on the outer peripheral side with respect to the optical axis 31b than the 1 st emission portion 61. The 3 rd emission portion 63 has an inner portion 63a, a central portion 63b, and an outer portion 63c. The inner portion 63a is located closer to the optical axis 31b than the central portion 63b, and the central portion 63b is located closer to the optical axis 31b than the outer portion 63c. As shown in fig. 5, the inner portion 63a is located closer to the light source 30b than the central portion 63b, and the central portion 63b is located closer to the light source 30b than the outer portion 63c in a direction parallel to the optical axis 31 b. In addition, in the direction parallel to the optical axis 31b, the inner portion 63a, the central portion 63b, and the outer portion 63c overlap the 2 nd internal reflection portion 52. When the lens 40b is viewed from the opposite side to the light source 30b along the optical axis 31a, the 1 st internal reflection portion 51 described above traverses the inner portion 63a, the central portion 63b, and the outer portion 63c. Each of the inner portion 63a, the central portion 63b, and the outer portion 63c is formed of a curved surface that extends along an arc centered on the optical axis 31b and curves in a convex shape to the side opposite to the light source 30b side. The inner portion 63a, the central portion 63b, and the outer portion 63c may each be formed of a plurality of curved surfaces or a plurality of flat surfaces. The inner portion 63a and the central portion 63b may be connected, the central portion 63b and the outer portion 63c may be connected, and the inner portion 63a and the central portion 63b and the outer portion 63c may be connected.
The 4 th internal reflection portion 54 is a portion that internally reflects a part of the light internally reflected by the 3 rd internal reflection portion 53 toward a 4 th emission portion 64 described later. As shown in fig. 8, in the present embodiment, when the lens 40b is viewed along the optical axis 31a from the opposite side to the light source 30b side, the 4 th internal reflection portion 54 is located on the outer peripheral side with respect to the optical axis 31b than the 1 st emission portion 61 and on the center side of the vehicle 100 than the optical axis 31 b. The 4 th internal reflection portion 54 has an inner portion 54a, a central portion 54b, and an outer portion 54c. The inner portion 54a is located closer to the optical axis 31b than the central portion 54b, and the central portion 54b is located closer to the optical axis 31b than the outer portion 54c. As shown in fig. 5, the inner portion 54a, the central portion 54b, and the outer portion 54c each extend toward the opposite side to the light source 30b side so as to approach the optical axis 31 b. In a direction parallel to the optical axis 31b, the inner portion 54a, the central portion 54b, and the outer portion 54c overlap the 3 rd internal reflection portion 53, respectively. The inner portion 54a, the central portion 54b, and the outer portion 54c are each formed of curved surfaces extending along an arc having the optical axis 31b as a center. The inner portion 54a, the central portion 54b, and the outer portion 54c may each be formed of a plurality of curved surfaces or a plurality of flat surfaces.
The 4 th emission portion 64 is a portion that emits a part of the light internally reflected by the 4 th internal reflection portion 54 in a direction not parallel to the vertical direction. In the present embodiment, the 4 th emission portion 64 is a portion that emits a part of the light internally reflected by the 4 th internal reflection portion 54 to the front side, that is, to the left side, which is the opposite side to the light source 30b side. As shown in fig. 8, when the lens 40b is viewed along the optical axis 31a from the opposite side to the light source 30b side, the 4 th emission portion 64 is located on the outer peripheral side with respect to the optical axis 31b and on the center side of the vehicle 100 with respect to the optical axis 31b than the 1 st emission portion 61. The 4 th emission portion 64 has an inner portion 64a, a central portion 64b, and an outer portion 64c. The inner portion 64a is located closer to the optical axis 31b than the central portion 64b, and the central portion 64b is located closer to the optical axis 31b than the outer portion 64c. The inner portion 64a is located closer to the optical axis 31b than the inner portion 54a of the 4 th internal reflection portion 54, the central portion 64b is located closer to the optical axis 31b than the central portion 54b of the 4 th internal reflection portion 54, and the outer portion 64c is located closer to the optical axis 31b than the outer portion 54c of the 4 th internal reflection portion 54. At least a part of the light internally reflected at the inner side 54a of the 4 th internal reflection portion 54 is emitted from the inner side 64a, at least a part of the light internally reflected at the central portion 54b of the 4 th internal reflection portion 54 is emitted from the central portion 64b, and at least a part of the light internally reflected at the outer side 54c of the 4 th internal reflection portion 54 is emitted from the outer side 64c. As shown in fig. 5, the inner portion 64a, the central portion 64b, and the outer portion 64c extend away from the optical axis 31b toward the opposite side from the light source 30 b. Further, in a direction parallel to the transmission direction of the light transmitted from the 3 rd internal reflection portion 53 toward the 4 th emission portion 64, a curved surface connecting the inner portion 64a and the inner portion 54a of the 4 th internal reflection portion 54, a curved surface connecting the central portion 64b and the central portion 54b of the 4 th internal reflection portion 54, and a curved surface connecting the outer portion 64c and the outer portion 54c of the 4 th internal reflection portion 54 overlap the 2 nd escape surface 56, respectively. Since the 2 nd escape surface 56 is present, light internally reflected by the 3 rd internal reflection portion 53 can be suppressed from being internally reflected by the curved surfaces or from being emitted in an unexpected direction from the curved surfaces, as compared with a case where the 2 nd escape surface 56 is not present and the 3 rd internal reflection portion 53 is also provided at a portion where the 2 nd escape surface 56 is provided. Each of the inner portion 64a, the central portion 64b, and the outer portion 64c is formed of a curved surface extending along an arc having the optical axis 31b as a center. The inner portion 64a, the central portion 64b, and the outer portion 64c may each be formed of a plurality of curved surfaces or a plurality of flat surfaces.
Next, the emission of light from the turn signal lamp 1 according to the present embodiment will be described. In the present embodiment, as described above, the turn signal lamp 1 has 3 lamp units 20a, 20b, and 20c, and light is repeatedly emitted from these 3 lamp units 20a, 20b, and 20c at predetermined time intervals.
In the turn signal lamp 1 of the present embodiment, electric power is supplied from a power supply, not shown, to the light sources 30a, 30b, 30c in the lamp units 20a, 20b, 20c substantially simultaneously, and orange light is emitted from these light sources 30a, 30b, 30 c. The light from the light sources 30a, 30b, 30c is emitted repeatedly at predetermined time intervals. Light emitted from the light source 30a enters the lens 40a and exits the lens 40a, light emitted from the light source 30b enters the lens 40b and exits the lens 40b, and light emitted from the light source 30c enters the lens 40c and exits the lens 40 c. Here, as described above, the lamp units 20a, 20b, and 20c have the same configuration. Therefore, the light paths of specific lights in the lamp units 20a, 20b, and 20c will be described for the light paths of lights in the lamp unit 20b, and the description thereof will be omitted appropriately for the light paths of lights in the lamp unit 20a and the lamp unit 20 c.
As shown in fig. 5 and 6, a part of the light emitted from the light source 30b of the lamp unit 20b enters the 1 st incident portion 41 of the incident portion 40i, and the other part enters the 2 nd incident portion 42 of the incident portion 40 i. Most of the light L1 entering the 1 st entrance portion 41 is emitted forward from the 1 st exit portion 61 without being internally reflected. In the present embodiment, as described above, the 1 st emission portion 61 is formed of a plurality of curved surfaces curved in a concave shape toward the optical axis 31 b. Therefore, the light L1 emitted from the 1 st emission portion 61 is diffused in the 1 st emission portion 61. That is, the 1 st emission portion 61 diffuses and emits the light L1.
On the other hand, as shown in fig. 6, the 1 st part of the light L21 entering the 2 nd incidence part 42 is internally reflected by the 2 nd internal reflection part 52 toward the 1 st internal reflection part 51, internally reflected by the 1 st internal reflection part 51 toward the 2 nd emission part 62, and emitted downward from the 2 nd emission part 62. That is, the light L21 of the 1 st portion is internally reflected 2 times and emitted downward from the 2 nd emission portion 62. In the present embodiment, the total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20c is larger than the total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20 b. The total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20b is larger than the total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20 a. That is, the arrangement of the 1 st internal reflection portion 51, the 2 nd internal reflection portion 52, and the 2 nd emission portion 62 in each of the lamp units 20a, 20b, and 20c, and the shapes thereof are adjusted so that the total amount of light emitted from the 2 nd emission portion 62 in the 3 lamp units 20a, 20b, and 20c becomes the above-described amount. The total amount of light emitted from the 2 nd emission portion 62 in the lamp units 20a, 20b, and 20c is not particularly limited, and may be substantially the same. The total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20b may be smaller than the total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20 a.
As shown in fig. 5 and 6, the light L22 of the 2 nd portion of the light entering the 2 nd incidence portion 42 is internally reflected by the 3 rd internal reflection portion 53 toward the 3 rd emission portion 63, and is emitted forward from the 3 rd emission portion 63. That is, the light L22 of the 2 nd portion is internally reflected 1 time and emitted forward from the 3 rd emission portion 63. The arrangement of the 3 rd internal reflection portion 53 and the 3 rd emission portion 63, and the shapes thereof are adjusted so that the light L22 of the 2 nd portion is emitted forward from the 3 rd emission portion 63 as described above.
As shown in fig. 5, the light L23 of the 3 rd part of the light entering the 2 nd incidence part 42 is internally reflected by the 3 rd internal reflection part 53 toward the 4 th internal reflection part 54, is internally reflected by the 4 th internal reflection part 54 toward the 4 th emission part, and is emitted from the 4 th emission part 64 forward and leftward. That is, the light L23 of the 3 rd portion is internally reflected 2 times and is emitted from the 4 th emission portion 64 forward and leftward. The arrangement of the 3 rd internal reflection portion 53, the 4 th internal reflection portion 54, and the 4 th emission portion 64, and their shapes are adjusted so that the light L23 of the 3 rd portion is emitted from the 4 th emission portion 64 forward and leftward as described above.
As shown in fig. 6, the light L24 of the 4 th portion of the light entering the 2 nd incidence portion 42 is emitted forward from the projection 40f of the connection plate 40d without being internally reflected. The arrangement of the connection plate 40d and the shape of the projection 40f are adjusted so that the light L24 of the 4 th portion is emitted forward from the projection 40f as described above.
In the lamp unit 20b, orange light emitted from the light source 30b is incident on the lens 40b, and a part of the light incident on the lens 40b is emitted forward from the lens 40b, and the other part is emitted from the lens 40b toward the road surface. The light beams L1, L22, L23, and L24 emitted forward from the lens 40b are emitted through the cover 12. The light L21 emitted from the lens 40b toward the road surface is emitted through the cover 12 and irradiates the road surface, and a predetermined drawing image is drawn on the road surface. In the lamp units 20a and 20c, the lights L1, L22, L23, and L24 emitted forward from the lens 40c are emitted through the cover 12, and the light L21 emitted from the lens 40c toward the road surface is emitted through the cover 12, so that the road surface is irradiated with the lights, and a predetermined drawing image is drawn on the road surface, as in the lamp unit 20 b. That is, each of the lamp units 20a, 20b, and 20c draws a predetermined drawing image on the road surface by the light L21. In the present embodiment, light is emitted from the light sources 30a, 30b, 30c of the 3 lamp units 20a, 20b, 20c substantially simultaneously. Therefore, in the turn signal lamp 1 of the present embodiment, light is emitted forward from each of the 3 lamp units 20a, 20b, 20c substantially simultaneously. The 3 lamp units 20a, 20b, and 20c each draw a predetermined drawing image on the road surface substantially simultaneously. As described above, since the light from the light sources 30a, 30b, and 30c is emitted repeatedly at predetermined time intervals, the turn signal lamp 1 blinks at predetermined time intervals, and the drawing images formed of the 3 drawing images are repeatedly drawn on the road surface in synchronization with the blinking.
Fig. 9 is a diagram for explaining a drawing image drawn on a road surface in embodiment 1, and is a diagram in which the road surface is viewed from above. Fig. 9 also illustrates a vehicle 100 and an irradiation range 81 described later. As shown in fig. 9, a drawing image 71 drawn on a road surface by the turn signal lamp 1 provided on the left side of the front portion of the vehicle 100 is formed of 3 drawing images 71a, 71b, 71c drawn on the road surface. The drawing image 71a is drawn by the lamp unit 20a disposed on the center-most side of the vehicle 100, the drawing image 71c is drawn by the lamp unit 20c disposed on the outer-most side of the vehicle 100, and the drawing image 71b is drawn by the lamp unit 20b disposed between the lamp unit 20a and the lamp unit 20 c. These drawing images 71a, 71b, 71c are arranged side by side in a direction away from the vehicle 100. Specifically, the drawing images 71a, 71b, and 71c are arranged obliquely leftward and forward from the vehicle 100. The drawing image 71a is located closest to the vehicle 100, the drawing image 71c is located furthest from the vehicle 100, and the drawing image 71b is located between the drawing image 71a and the drawing image 71 c. That is, the drawing images 71a, 71b, 71c of the 3 lamp units 20a, 20b, 20c are closer to the vehicle 100 as the lamp units 20a, 20b, 20c located on the center side of the vehicle 100 are. The drawing images 71a, 71b, and 71c are each formed in a substantially rectangular shape elongated in the parallel direction. The drawing images 71a, 71b, and 71c are separated from each other, and the 2 drawing images 71b and 71c are positioned in front of the vehicle 100. That is, the turn signal lamp 1 provided on the left side of the front portion of the vehicle 100 adjusts the arrangement of the 1 st internal reflection portion 51, the 2 nd internal reflection portion 52, and the 2 nd emission portion 62, and the shape thereof, among the 3 lamp units 20a, 20b, and 20c, so that the drawing image 71 described above is drawn. The drawing images 71a, 71b, and 71c may be superimposed on each other, and the shapes and sizes of the drawing images 71a, 71b, and 71c may be different from each other. For example, the drawing images 71a, 71b, and 71c may be larger as they are farther from the vehicle 100. Further, all of the drawing images 71a, 71b, and 71c may be positioned in front of the vehicle 100, or all of the drawing images 71a, 71b, and 71c may not be positioned in front of the vehicle 100. The drawing image 72 drawn on the road surface by the turn signal lamp 1 provided on the right side of the front portion of the vehicle 100 is symmetrical to the drawing image 71 in the left-right direction.
As described above, the turn signal lamp 1 of the present embodiment has a plurality of lamp units 20a, 20b, 20c. Each of the plurality of lamp units 20a, 20b, 20c has a light source 30a, 30b, 30c and a lens 40a, 40b, 40c, and the lens 40a, 40b, 40c has an incident portion 40i, a 1 st internal reflection portion 51, a 1 st emission portion 61, and a 2 nd emission portion 62. Light emitted from the light sources 30a, 30b, 30c is incident on the incident portion 40 i. The 1 st emission portion 61 emits light L1, which is a part of the light incident on the incident portion 40i, in a direction not parallel to the vertical direction. The 1 st internal reflection section 51 internally reflects the light L21, which is another part of the light incident on the incident section 40i, toward the 2 nd emission section 62. The 2 nd emission portion 62 emits at least a part of the light L21 internally reflected by the 1 st internal reflection portion 51 toward the road surface. Each of the plurality of lamp units 20a, 20b, and 20c draws predetermined drawing images 71a, 71b, and 71c on the road surface by the light L21 emitted from the 2 nd emission portion 62. The drawing images 71a, 71b, 71c drawn to the road surface by the plurality of lamp units 20a, 20b, 20c are arranged side by side in a direction away from the vehicle 100.
In the turn signal lamp 1 of the present embodiment, the plurality of lamp units 20a, 20b, and 20c emit light L1, L22, L23, and L24 in directions not parallel to the vertical direction, respectively, and emit light L21 toward the road surface, and predetermined drawing images 71a, 71b, and 71c are drawn on the road surface by the light L21 emitted toward the road surface. Therefore, in the turn signal lamp 1 of the present embodiment, the light L1, L22, L23, L24 emitted in the direction not parallel to the vertical direction and the drawing images 71a, 71b, 71c drawn on the road surface can notify the surroundings of the vehicle 100 of the operation of the vehicle 100. Therefore, the turn signal lamp 1 of the present embodiment can improve the notification function as compared with a case where the drawing image is not drawn on the road surface. In the turn signal lamp 1 of the present embodiment, the drawing images 71a, 71b, and 71c drawn on the road surface by the plurality of lamp units 20a, 20b, and 20c are arranged in the direction away from the vehicle. Therefore, the turn signal lamp 1 of the present embodiment can improve the visibility of the drawing images 71a, 71b, and 71c from the front of the vehicle 100 and the rear of the vehicle 100, and can improve the notification function, as compared with a case where the drawing images 71a, 71b, and 71c are arranged along the side of the vehicle 100, for example. In the turn signal lamp 1 of the present embodiment, the light sources for emitting the light L1, L22, L23, L24 in the directions not parallel to the vertical direction and the light sources for drawing the drawing images 71a, 71b, 71c are shared by the lamp units 20a, 20b, 20c. The lamp units 20a, 20b, and 20c share lenses for emitting the light L1, L22, L23, and L24 in directions not parallel to the vertical direction and lenses for drawing the drawing images 71a, 71b, and 71c. Therefore, even if the turn signal lamp 1 has a plurality of lamp units 20a, 20b, 20c, the increase in size of the turn signal lamp 1 can be suppressed.
In addition, from the viewpoint of improving the notification function, it is preferable that the 3 drawing images 71a, 71b, 71c are located within the irradiation range 81 shown in fig. 9. The irradiation range 81 is a square having a length of one side of approximately 150 cm. The irradiation range 81 is located on the opposite side of the center side of the vehicle 100 from the straight line SL1 extending in the front-rear direction through the center of the left-right direction of the turn signal lamp 1, and is located on the front side from the straight line SL2 extending in the left-right direction through the front end of the turn signal lamp 1. One set of opposite sides of the irradiation range 81 is substantially parallel to the straight line SL1, and the other set of opposite sides of the irradiation range 81 is substantially parallel to the straight line SL 2. The irradiation range 81 and the straight line SL1 are separated by approximately 50cm from the irradiation range 81 and the straight line SL2, respectively.
In general, since light is transmitted divergently, the drawn image tends to be darker as it is farther from the vehicle 100. However, in the turn signal lamp 1 of the present embodiment, as described above, the total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20c is larger than the total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20 b. The total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20b is larger than the total amount of light emitted from the 2 nd emission portion 62 in the lamp unit 20 a. In addition, the drawing image 71a drawn by the lamp unit 20a is located closest to the vehicle 100, the drawing image 71c drawn by the lamp unit 20c is located furthest from the vehicle 100, and the drawing image 71b drawn by the lamp unit 20b is located between the drawing image 71a and the drawing image 71 c. That is, as for the total amount of light emitted from the 2 nd emission portion 62 in each of the plurality of lamp units 20a, 20b, 20c, the more the drawing images 71a, 71b, 71c are far from the lamp units 20a, 20b, 20c of the vehicle 100, the greater the total amount of light is. Therefore, the turn signal lamp 1 of the present embodiment is less likely to cause a difference in brightness of the drawing images 71a, 71b, and 71c drawn by the plurality of lamp units 20a, 20b, and 20c, respectively.
In the turn signal lamp 1 of the present embodiment, the lenses 40a, 40b, 40c in the plurality of lamp units 20a, 20b, 20c are integrally formed with each other. Therefore, the turn signal lamp 1 of the present embodiment can reduce the number of components.
The turn signal lamp 1 of the present embodiment diffuses and emits light L1, which is a part of light entering the incident portion 40 i. Therefore, even if the total amount of light emitted from the light sources 30a, 30b, and 30c is increased, the brightness in the 1 st emission portion 61 can be suppressed from becoming brighter than the predetermined threshold value. Therefore, the turn signal lamp 1 according to the present embodiment can make the drawn images 71a, 71b, and 71c brighter while suppressing the brightness in the 1 st output portion 61 from becoming brighter than the predetermined threshold value.
The lenses 40a, 40b, 40c of the turn signal lamp 1 of the present embodiment further have a 2 nd internal reflection portion 52 and a 1 st escape surface 55 connected to an outer edge 52e of the 2 nd internal reflection portion 52. The 2 nd internal reflection portion 52 internally reflects the light L21, which is a part of the light incident on the incident portion 40i, toward the 1 st internal reflection portion 51. The 1 st escape surface 55 extends from the outer edge 52e to the side opposite to the incident portion 40i so as to overlap the 2 nd internal reflection portion 52 in a direction parallel to the transmission direction of the light LR transmitted from the incident portion 40i toward the outer edge 52e, which is the connection portion between the 2 nd internal reflection portion 52 and the 1 st escape surface 55. Here, since the light is transmitted in the lenses 40a, 40b, and 40c in a straight line, the light entering the entrance portion 40i is less likely to enter the 1 st escape surface 55 than when the 1 st escape surface 55 is not overlapped with the 2 nd internal reflection portion 52 in a direction parallel to the transmission direction of the light LR transmitted from the entrance portion 40i toward the outer edge 52e which is a connection portion between the 2 nd internal reflection portion 52 and the 1 st escape surface 55. That is, the 1 st escape surface 55, into which light entering the incident portion 40i is difficult to enter, is connected to the outer edge 52e of the 2 nd internal reflection portion 52. Therefore, the turn signal lamp 1 of the present embodiment can suppress light transmitted from the incident portion 40i toward the periphery of the 2 nd internal reflection portion 52 from being internally reflected at the periphery of the 2 nd internal reflection portion 52 and emitting light in an unexpected direction, compared to the case where the 1 st escape surface 55 does not overlap with the 2 nd internal reflection portion 52 in a direction parallel to the transmission direction of the light LR transmitted from the incident portion 40i toward the outer edge 52e, which is a connection portion between the 2 nd internal reflection portion 52 and the 1 st escape surface 55.
In addition, in the turn signal lamp 1 of the present embodiment, the 2 nd emission portion 62 overlaps the 1 st escape surface 55 in a direction parallel to the transmission direction of the light transmitted from the 2 nd internal reflection portion 52 toward the 1 st internal reflection portion 51. Therefore, compared to the case where the 1 st escape surface 55 is not provided and the 2 nd internal reflection portion 52 extends to the portion where the 1 st escape surface 55 is provided, the light internally reflected by the 2 nd internal reflection portion 52 can be suppressed from being internally reflected by the 2 nd emission portion 62 or from being emitted in an unexpected direction from the 2 nd emission portion 62.
(embodiment 2)
Next, embodiment 2 of the present invention will be described in detail. The same or equivalent components as those of embodiment 1 are denoted by the same reference numerals unless otherwise specifically described, and redundant description thereof is omitted.
The turn signal lamp 1 of the present embodiment is mainly different from the turn signal lamp 1 of embodiment 1 in that it is a turn signal lamp for the rear in a motorcycle. The turn signal lamp 1 of the present embodiment is disposed on the left and right of the rear portion of the vehicle 100, and the turn signal lamp 1 disposed on the right and the turn signal lamp 1 disposed on the left are formed in a shape symmetrical to each other on the left and right. The turn signal lamp 1 of the present embodiment is substantially symmetrical to the turn signal lamp 1 of embodiment 1 in the front-rear direction. Therefore, in the turn signal lamp 1 of the present embodiment, as in embodiment 1, the light L1, L22, L23, L24 is emitted rearward from the lenses 40a, 40b, 40c in the lamp units 20a, 20b, and 20c, and these lights L1, L22, L23, L24 are emitted rearward through the cover 12. Light L21 is emitted downward from the lenses 40a, 40b, and 40c, and the light L21 is emitted through the cover 12 to be irradiated to the road surface, and a predetermined drawing image is drawn on the road surface.
Fig. 10 is a diagram for explaining a drawing image drawn on a road surface in embodiment 2, and is a diagram in which the road surface is viewed from above. Fig. 10 also illustrates a vehicle 100 and an irradiation range 82 described later. As shown in fig. 10, a drawing image 71 drawn on the road surface by the turn signal lamp 1 provided on the left side of the rear portion of the vehicle 100 is formed of 3 drawing images 71a, 71b, 71c drawn on the road surface. The drawing image 71a is drawn by the lighting unit 20a, the drawing image 71c is drawn by the lighting unit 20c, and the drawing image 71b is drawn by the lighting unit 20 a. These drawing images 71a, 71b, 71c are arranged side by side in a direction away from the vehicle 100. Specifically, the drawing images 71a, 71b, and 71c are arranged in the left direction from the vehicle 100, and are distant from the vehicle 100 in the order of the drawing image 71a, the drawing image 71b, and the drawing image 71 c. That is, the drawing images 71a, 71b, and 71c of the 3 lamp units 20a, 20b, and 20c are closer to the vehicle 100 as the lamp units 20a, 20b, and 20c are located on the center side of the vehicle 100. The drawing images 71a, 71b, and 71c are each formed in a substantially rectangular shape elongated in the parallel direction. The drawing images 71a, 71b, and 71c are separated from each other and located at the rear side of the vehicle 100. That is, the turn signal lamp 1 provided on the left side of the rear portion of the vehicle 100 adjusts the arrangement of the 1 st internal reflection portion 51, the 2 nd internal reflection portion 52, and the 2 nd emission portion 62, and the shape thereof, among the 3 lamp units 20a, 20b, and 20c, so that the drawing image 71 described above is drawn. The drawing images 71a, 71b, and 71c may be superimposed on each other, and the shapes and sizes of the drawing images 71a, 71b, and 71c may be different from each other. For example, the drawing images 71a, 71b, and 71c may be larger as they are farther from the vehicle 100. The drawing images 71a, 71b, and 71c may not be located at the rear side of the vehicle 100. The drawing image 72 drawn on the road surface by the turn signal lamp 1 provided on the right side of the rear portion of the vehicle 100 is symmetrical to the drawing image 71 in the left-right direction.
The turn signal lamp 1 of the present embodiment can improve the notification function as compared with the case where the drawing image is not drawn on the road surface, as in embodiment 1. In addition, in the turn signal lamp 1 of the present embodiment, as in embodiment 1, for example, compared with a case where the drawing images 71a, 71b, and 71c are arranged along the side of the vehicle 100, the visibility of the drawing images 71a, 71b, and 71c from the front of the vehicle 100 and the rear of the vehicle 100 can be improved, and the notification function can be improved. In addition, in the turn signal 1 of the present embodiment, as in embodiment 1, even if the turn signal 1 has a plurality of lamp units 20a, 20b, 20c, the increase in size of the turn signal 1 can be suppressed.
In addition, from the viewpoint of improving the notification function, it is preferable that the 3 drawing images 71a, 71b, 71c are located within the irradiation range 82 shown in fig. 10. The irradiation range 82 is a square having a length of one side of approximately 150 cm. The irradiation range 82 is located on the opposite side of the center side of the vehicle 100 from a straight line SL3 extending in the front-rear direction through the center of the left-right direction of the turn signal lamp 1, and is located on the rear side from a straight line SL4 extending in the left-right direction through the rear end of the turn signal lamp 1. One set of opposite sides of the irradiation field 82 is substantially parallel to the straight line SL3, and the other set of opposite sides of the irradiation field 82 is substantially parallel to the straight line SL 4. The irradiation range 82 and the straight line SL3 are separated by approximately 50cm from the irradiation range 82 and the straight line SL4, respectively.
(embodiment 3)
Next, embodiment 3 of the present invention will be described in detail. The same or equivalent components as those of embodiment 1 are denoted by the same reference numerals unless otherwise specifically described, and redundant description thereof is omitted.
The turn signal lamp 1 of the present embodiment is mainly different from the turn signal lamp 1 of embodiment 1 in the timing of light emission from the plurality of lamp units 20a, 20b, 20 c. In the present embodiment, the lamp units 20a, 20b, and 20c sequentially emit light from the light sources 30a, 30b, and 30 c. In the present embodiment, as in embodiment 1, the lamp units 20a, 20b, and 20c are arranged in this order from the center side toward the outside side of the vehicle 100. Therefore, it can be understood that the lamp units 20a, 20b, and 20c emit light from the light sources 30a, 30b, and 30c in order from the lamp unit 20a located on the center side of the vehicle 100.
Specifically, after a predetermined time has elapsed from the emission of light from the light source 30a of the lamp unit 20a, the light is emitted from the light source 30b of the lamp unit 20 b. Further, the emission of light from the light source 30a of the lamp unit 20a is maintained. Therefore, light is emitted forward from the 2 lamp units 20a, 20b, and 2 drawing images 71a, 71b shown in fig. 9 are drawn to the road surface. Then, after a predetermined time has elapsed from the emission of light from the light source 30b of the lamp unit 20b, light is emitted from the light source 30c of the lamp unit 20 c. Light is also maintained from the light sources 30a, 30b of the lamp units 20a, 20 b. Therefore, light is emitted forward from the 3 lamp units 20a, 20b, 20c, and the 3 drawing images 71a, 71b, 71c shown in fig. 9 are drawn to the road surface. Then, after a predetermined time has elapsed from the emission of light from the light source 30c of the lamp unit 20c, no light is emitted from the light sources 30a, 30b, 30c of the lamp units 20a, 20b, 20 c. Thus, the turn signal lamp 1 is turned off. After a predetermined time has elapsed since the light is not emitted from the light sources 30a, 30b, 30c, the light is emitted from the light source 30a of the lamp unit 20 a. Therefore, only the light is emitted forward from the lamp unit 20a, and only the drawing image 71a shown in fig. 9 is drawn to the road surface. The turn signal lamp 1 of the present embodiment repeatedly emits light from the light sources 30a, 30b, 30c as described above.
As described above, the 3 lamp units 20a, 20b, and 20c emit light from the light sources 30a, 30b, and 30c in order from the lamp unit 20a located on the center side of the vehicle 100. As described above, the drawing images 71a, 71b, and 71c of the 3 lamp units 20a, 20b, and 20c are closer to the vehicle 100 as the lamp units 20a, 20b, and 20c are located on the center side of the vehicle 100. Therefore, the turn signal lamp 1 of the present embodiment can turn on the turn signal lamp 1 so as to appear as if light flows from the center side to the outside side of the vehicle 100. In addition, the turn signal lamp 1 of the present embodiment can draw a moving image that appears to be light flowing in a direction away from the vehicle 100 onto the road surface.
The time from the start of light emission from the light source 30a to the start of light emission from the light source 30b is preferably substantially the same as the time from the start of light emission from the light source 30b to the start of light emission from the light source 30 c. Further, these times are more preferably substantially the same as the time from when light starts to be emitted from the light source 30c to when light does not exit from the light sources 30a, 30b, 30 c. In the present embodiment, the 3 lamp units 20a, 20b, and 20c may emit light from the light sources 30a, 30b, and 30c in order from the lamp unit 20a located on the center side of the vehicle 100. For example, the light source 30a may be set to not emit light before the light emission from the light source 30c is started, or the light sources 30a and 30b may be set to not emit light before the light source 30c is set to not emit light.
The present invention has been described above by taking the above embodiments as an example, but the present invention is not limited to these embodiments.
For example, in the above embodiment, the turn signal lamp 1 for a motorcycle having 3 lamp units 20a, 20b, and 20c is described as an example. However, the turn signal lamp is not limited to use in a motorcycle. The number of lamp units included in the turn signal lamp may be 2 or 4 or more.
In the above embodiment, the turn signal lamp 1 for a motorcycle having the plurality of lamp units 20a, 20b, and 20c arranged side by side from the center side toward the outside side of the vehicle 100 has been described as an example. However, in embodiment 1 and embodiment 2 described above, the plurality of lamp units 20a, 20b, and 20c may not be arranged side by side from the center side toward the outside side of the vehicle 100.
In the above embodiment, the light sources 30a, 30b, and 30c that emit orange light are described as an example. However, the color of the light emitted from the light sources 30a, 30b, 30c is not particularly limited. For example, the light sources 30a, 30b, 30c may emit white light. In this case, for example, the cover 12 has light transmittance and is colored orange. The number and types of the light sources 30a, 30b, and 30c are not particularly limited. For example, the light sources 30a, 30b, and 30c emitting orange light may be laser elements emitting laser light.
In the above embodiment, the description has been given taking, as an example, 3 lenses 40a, 40b, and 40c integrally formed with each other via the connection plate 40 d. However, the lenses 40a, 40b, and 40c may be formed separately.
In the above embodiment, the lenses 40a, 40b, and 40c having the incident portion 40i including the 1 st incident portion 41 and the 2 nd incident portion 42, the 1 st internal reflection portion 51, the 2 nd internal reflection portion 52, the 3 rd internal reflection portion 53, the 1 st escape surface 55, the 2 nd escape surface 56, the 1 st emission portion 61, the 2 nd emission portion 62, the 3 rd emission portion 63, and the 4 th emission portion 64 are described as an example. However, the lenses 40a, 40b, and 40c may have the incident portion 40i, the 1 st internal reflection portion 51, the 1 st emission portion 61, and the 2 nd emission portion 62. For example, the incident portion 40i of the lenses 40a, 40b, 40c may be constituted by only the 1 st incident portion 41. In this case, for example, a part of the light entering the 1 st entrance portion 41 is emitted from the 1 st exit portion 61, and the other part is internally reflected by the 2 nd internal reflection portion 52.
Industrial applicability
According to the present invention, a turn signal lamp capable of improving a notification function and suppressing an increase in size is provided, and the turn signal lamp can be used in the field of a turn signal lamp for an automobile or the like.

Claims (6)

1. A turn signal lamp is characterized in that,
comprises a plurality of lamp units, wherein the lamp units comprise a light source and a lens, the lens comprises an incident part, a 1 st internal reflection part, a 1 st emergent part and a 2 nd emergent part,
light emitted from the light source is incident on the incident portion,
the 1 st emission part emits a part of the light entering the incidence part in a direction not parallel to the vertical direction,
the 1 st internal reflection part internally reflects another part of the light incident to the incident part toward the 2 nd exit part,
the 2 nd emission part emits at least a part of the light internally reflected by the 1 st internal reflection part toward a road surface,
each of the plurality of lamp units draws a predetermined drawing image on a road surface by light emitted from the 2 nd emission portion,
the depicted images depicted to the road surface by the respective plurality of light fixture units are side by side in a direction away from the vehicle,
the lens further has a 2 nd internal reflection portion and a back-off surface connected to an outer edge of the 2 nd internal reflection portion,
the 2 nd internal reflection part internally reflects the other part of the light incident to the incident part toward the 1 st internal reflection part,
The escape surface extends from the connection portion to the side opposite to the incidence portion side so as to overlap the 2 nd internal reflection portion when viewed in a direction parallel to a transmission direction of light transmitted from the incidence portion to the connection portion of the 2 nd internal reflection portion and the escape surface.
2. The turn signal lamp of claim 1 wherein the signal lamp is configured to provide a signal,
the total amount of light emitted from the 2 nd emission portion of each of the plurality of lamp units is larger as the drawing image is farther from the lamp unit of the vehicle.
3. The turn signal lamp according to claim 1 or 2, characterized in that,
the lenses of the plurality of light fixture units are integrally formed with each other.
4. The turn signal lamp according to claim 1 or 2, characterized in that,
the 1 st emission portion diffuses and emits the part of the light incident on the incident portion.
5. The turn signal lamp according to claim 1 or 2, characterized in that,
the plurality of lamp units are set to 3 or more and are arranged side by side from the center side toward the outer side of the vehicle.
6. The turn signal lamp of claim 5, wherein,
The plurality of lamp units sequentially emit light from the light source from the lamp unit located on the center side of the vehicle,
regarding the drawing image drawn to the road surface by each of the plurality of lamp units, the closer the lamp unit is located on the center side of the vehicle, the closer the drawing image thereof is to the vehicle.
CN202010811871.7A 2019-08-28 2020-08-13 Steering signal lamp Active CN112443812B (en)

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JP2019155863A JP2021034309A (en) 2019-08-28 2019-08-28 Turn signal lamp
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JP2022167287A (en) * 2021-04-23 2022-11-04 スタンレー電気株式会社 Light emitting unit and vehicular lamp fitting
US20230060185A1 (en) * 2021-08-24 2023-03-02 Lumileds Llc Led retrofit vehicle signaling lamp with projection led light source, smartphone app for controlling it and corresponding system
JP2024008731A (en) * 2022-07-08 2024-01-19 株式会社小糸製作所 Vehicular lighting fixture

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JP2005158362A (en) * 2003-11-21 2005-06-16 Stanley Electric Co Ltd Lighting fixture for vehicle
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CN102818217B (en) * 2012-09-11 2014-07-09 创高国际企业有限公司 Secondary optical lens and related device thereof
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EP3559545B1 (en) * 2016-12-23 2023-04-26 Lumileds LLC Light emitting module with light guide plate for automotive headlight
CN107062123B (en) * 2017-03-01 2023-04-14 华域视觉科技(上海)有限公司 Projection type optical lighting system for automobile lamp

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