JP2010018120A - Headlight system for bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headlight system for a bicycle equipped with a cornering lamp capable of irradiating two kinds of light distribution patterns with a comparatively simple structure. <P>SOLUTION: The headlight system for the bicycle comprises a lamp for a low beam irradiating the low beam, and a bank angle interlocking cornering lamp 20 arranged with an optical axis so as to tilt from an optical axis of the lamp for the low beam at a predetermined angle. The bank angle interlocking cornering lamp 20 comprises a reflector 24 formed with a reflecting surface 32 considering a rotation parabolic surface having an optical axis AX3 as a center axis as a reference surface, a first filament 27 disposed at a focus F of the rotation parabolic surface of the reflector 24, a second filament 28 disposed at a position separated from the focus F, and a control portion 30 controlling lighting of the first filament 27 and the second filament 28. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a two-wheeled vehicle lamp system, and more particularly, to a two-wheeled vehicle lamp system including a cornering lamp that is turned on during cornering.

  In general, a two-wheeled vehicle travels a corner while tilting the vehicle body in a turning direction when the rider tilts the center of gravity to the left or right. Therefore, the cut-off line in the light distribution pattern formed by the headlamp is greatly inclined from the horizontal as the two-wheeled vehicle is inclined and the bank angle is increased. In particular, since the cut-off line on the traveling direction side is greatly lowered in the downward direction, the distance visibility near the exit of the corner is lowered.

  In order to solve such a problem, for example, a two-wheeled vehicle lamp system disclosed in Patent Document 1 is known. This two-wheeled vehicle lamp system is a two-wheeled vehicle lamp system including a low-beam lamp that irradiates a low-pass beam and a cornering lamp that lights during cornering. The cornering lamp includes a light source bulb that emits light, a reflector that reflects the light emitted from the light source bulb, a projection lens that projects light reflected by the reflector forward along the optical axis, and a reflector to the projection lens. A part of the light is shielded to form a predetermined cut-off line, and a movable shade that can be displaced to the first position and the second position is provided. The cornering lamp arranges the movable shade at the first position in response to a corner approach signal indicating entry into the curved road, irradiates light to the side of the passing beam, and indicates that the vehicle is traveling on the curved road. A movable shade is arranged at the second position in accordance with the cornering signal to irradiate light above the passing beam.

According to this motorcycle lamp system, the cornering lamp emits two types of light distribution patterns by switching the movable shade between the first position and the second position according to the corner approach signal and the cornering signal. Can do. Even if the motorcycle is not banked before entering the curve or in the bank after entering the curve, it is possible to irradiate with sufficient light in the direction of the curve so that the rider can always see far away. We can continue to secure.
JP 2008-1306 A

  However, in the case of the two-wheeled vehicle lamp system disclosed in Patent Document 1, the cornering lamp requires a movable shade to irradiate two types of light distribution patterns. There is a risk that.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a two-wheeled vehicle lamp system including a cornering lamp that can irradiate two kinds of light distribution patterns with a relatively simple configuration. is there.

  In order to solve the above problems, a two-wheeled vehicle lamp system according to an aspect of the present invention is arranged such that a low beam lamp that irradiates a low beam and an optical axis that is inclined at a predetermined angle from the optical axis of the low beam lamp. A lamp system for a motorcycle including a cornering lamp provided. A cornering lamp includes a reflector having a reflecting surface with a rotating paraboloid surface having the optical axis of the cornering lamp as a central axis as a reference surface, a first light source disposed at a focal point of the rotating paraboloid of the reflector, and a reflector A second light source disposed at a position away from the focal point of the rotary paraboloid, and a controller that controls lighting of the first light source and the second light source.

  According to this aspect, the cornering lamp has two types of light distributions: a first light distribution pattern formed by turning on the first light source and a second light distribution pattern formed by turning on the second light source. A light pattern can be irradiated. Accordingly, the motorcycle lamp system can be controlled to irradiate a different light distribution pattern depending on the bank angle, for example. A movable mechanism such as a movable shade is not required, and two types of light distribution patterns can be irradiated with a relatively simple configuration in which the first light source and the second light source are selectively turned on, thereby reducing costs. be able to.

  The second light source may be disposed at a position above the first light source. In this case, when the second light source is turned on, it is possible to irradiate light that is directed diagonally forward and downward. Thereby, the situation where the driver of the oncoming vehicle located on the corner side feels dazzling can be prevented.

  The cornering lamp may have a double filament bulb that incorporates first and second filaments, the first filament may constitute a first light source, and the second filament may constitute a second light source. In this case, since the configuration is simplified, the cornering lamp can be suitably configured.

  The control unit turns on the second light source when the bank angle of the vehicle body is equal to or larger than the predetermined first bank angle, and first when the bank angle of the vehicle body is equal to or larger than the predetermined second bank angle larger than the first bank angle. The light source may be turned on. For example, the first bank angle may be set to 10 degrees and the second bank angle may be set to 20 degrees. Since the 1st light source is arrange | positioned at the focus of the rotating paraboloid of a reflector, the light distribution pattern which has a clear cut-off line is irradiated. On the other hand, since the 2nd light source is arrange | positioned in the position spaced apart from the focus of the rotating paraboloid of a reflector, the light distribution pattern with which the cutoff line was blurred is irradiated. When cornering, the vehicle body is generally tilted gradually, but once the cut-off line irradiates a blurred light distribution pattern, and then the cut-off line emits a clear light distribution pattern, the rider can respond to changes in brightness. The eyes can be easily used, so that visibility can be improved.

  You may further provide the turn signal signal interlocking cornering lamp which irradiates light to the side of a passing beam according to a turn signal. In this case, even when the motorcycle is not banked before entering the corner, the corner side can be irradiated with light to enhance the corner side visibility.

  ADVANTAGE OF THE INVENTION According to this invention, the two-wheeled vehicle lamp system provided with the cornering lamp which can irradiate two types of light distribution patterns with a comparatively simple structure can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic front view of a two-wheeled vehicle lamp system 10 according to an embodiment of the present invention. FIG. 2 is a schematic horizontal sectional view of the motorcycle lamp system 10.

  The two-wheeled vehicle lamp system 10 is a lamp unit that is provided on the front side of a two-wheeled vehicle and irradiates the traveling direction side of the two-wheeled vehicle. As shown in FIG. 1, the two-wheeled vehicle lamp system 10 includes a lamp 12 for irradiating a passing beam into a lamp chamber 25 formed by a cover 22 and a lamp body 18, and a traveling beam for irradiating a traveling beam. Light is emitted to the side of the low beam according to the lamp 14, the left turn signal interlocking corner lamp 16L and the right turn signal interlocking cornering lamp 16R that emit light to the side of the passing beam in accordance with the turn signal. The left bank angle interlocking cornering lamp 20L and the right bank angle interlocking cornering lamp 20R are provided.

  The left turn signal interlocking cornering lamp 16L and the right turn signal interlocking cornering lamp 16R have symmetrical structures and arrangements, and are collectively referred to as “the blinker interlocking cornering lamp 16”. Further, the left bank angle interlocking cornering lamp 20L and the right bank angle interlocking cornering lamp 20R have a bilaterally symmetric structure and arrangement, and are collectively referred to as “bank angle interlocking cornering lamp 20”.

  As shown in FIG. 1, the low beam lamp 12 is provided above the center of the motorcycle lamp system 10. In the present embodiment, the low beam lamp 12 is a so-called parabolic lamp that reflects the light emitted from the bulb to the front of the vehicle with a reflector formed in the shape of a rotating paraboloid. The low beam lamp 12 irradiates light in front of the motorcycle along the optical axis Ax1 to form a low beam light distribution pattern having a predetermined cut-off line. The optical axis Ax1 of the low beam lamp 12 substantially coincides with the front-rear direction of the motorcycle. The passing beam lamp 12 is not limited to a parabolic type, and may be a projector type lamp, for example.

  The traveling beam lamp 14 is provided below the center of the motorcycle lamp system 10. In the present embodiment, the traveling beam lamp 14 is a parabolic lamp. The traveling beam lamp 14 irradiates light ahead of the vehicle with a predetermined high beam light distribution pattern. The traveling beam lamp 14 is not limited to a parabolic type, and may be a projector type lamp, for example.

  The winker interlocking cornering lamp 16 irradiates light to the side of the passing beam in accordance with the winker signal. Even if the two-wheeled vehicle is not banked before entering the corner, the corner-side visibility can be improved by irradiating light to the corner side.

  The left turn signal interlocking corner lamp 16L is disposed on the left side (right side when viewed from the front) of the traveling beam lamp 14, and the right turn signal interlocking cornering lamp 16R is disposed on the right side (left side when viewed from the front) of the traveling beam lamp 14. Is done. In the present embodiment, the blinker-linked cornering lamp 16 is a parabolic lamp, but may be a projector-type lamp, for example. As shown in FIG. 2, the blinker-linked cornering lamp 16 is arranged such that its optical axis Ax2 is inclined at a predetermined first inclination angle θ1 in the horizontal plane from the optical axis Ax1 of the passing beam lamp 12. The first inclination angle θ1 may be about 17 degrees, for example.

  The bank angle interlocking cornering lamp 20 irradiates light to the side of the passing beam according to the bank angle φ of the motorcycle. The left bank angle interlocking cornering lamp 20L is disposed on the left side (right side when viewed from the front) of the passing beam lamp 12, and the right bank angle interlocking cornering lamp 20R is disposed on the right side (left side when viewed from the front) of the passing beam lamp 12. Is done. In the present embodiment, the bank angle interlocking cornering lamp 20 is a parabolic lamp. As shown in FIG. 2, the bank angle interlocking cornering lamp 20 is arranged such that its optical axis Ax3 is inclined at a predetermined second inclination angle θ2 from the optical axis Ax1 of the passing beam lamp 12.

  As shown in FIG. 2, lighting of the passing beam lamp 12, the traveling beam lamp 14, the turn signal interlocking cornering lamp 16, and the bank angle interlocking cornering lamp 20 is controlled by a control unit 30 mounted on a motorcycle such as an ECU. . The control unit 30 includes a winker signal output from a winker operation switch (not shown) provided on the motorcycle and a bank angle output from a bank angle sensor (not shown) that detects the bank angle φ of the motorcycle. Signals are input, and the control unit 30 controls lighting of the turn signal interlocking cornering lamp 16 and the bank angle interlocking cornering lamp 20 according to these signals.

  FIG. 3 is a vertical sectional view of the bank angle interlocking cornering lamp 20 according to the embodiment of the present invention. The bank angle interlocking cornering lamp 20 is a parabolic lamp, and includes a bulb 26 and a reflector 24.

  The reflector 24 includes a reflecting surface 32 formed with a rotational paraboloid surface having the optical axis Ax3 as a central axis as a reference surface. Has been.

  The bulb 26 is a so-called H4 halogen bulb, and is a double filament bulb containing two filaments: a first filament 27 as a first light source and a second filament 28 as a second light source.

  In the bulb 26, the first filament 27 is arranged at the position of the focal point F on the paraboloid of the reflector 24, and the second filament 28 is arranged above the first filament 27 spaced from the focal point F. Attached to. More specifically, the bulb 26 is attached to the reflector 24 so that the focal point F is positioned substantially at the center of the lower end surface of the first filament 27. Further, the second filament 28 only needs to be positioned above the first filament 27, and does not have to be strictly above the first filament 27.

  The control unit 30 lights either the first filament 27 or the second filament 28 in accordance with the bank angle signal input from the bank angle sensor. Specifically, the control unit 30 turns on the second filament 28 when the bank angle φ of the two-wheeled vehicle is equal to or larger than the predetermined first bank angle φ1, and the two-wheeled vehicle bank angle φ is larger than the first bank angle φ1. The first filament 27 is turned on when the second bank angle φ2 or more. The first bank angle φ1 is determined with reference to an average bank angle in the initial stage of cornering. The second bank angle φ2 is determined with reference to an average bank angle in the middle stage of cornering. For example, the first bank angle φ1 may be about 10 degrees, and the second bank angle φ may be about 20 degrees.

  FIG. 4 is a diagram for explaining light emitted from the bank angle interlocking cornering lamp 20 when the first filament 27 is turned on. As described above, the first filament 27 is turned on when the bank angle φ of the motorcycle is equal to or larger than the second bank angle φ2.

  Since the first filament 27 is arranged at the position of the focal point F of the rotating paraboloid of the reflector 24, the light emitted from the first filament 27 is reflected by the reflecting surface 32 and the optical axis Ax3 of the bank angle interlocking cornering lamp 20. Is reflected in a direction parallel to the. Accordingly, when the first filament 27 is turned on, the bank angle interlocking cornering lamp 20 is irradiated with light parallel to the optical axis Ax3 of the bank angle interlocking cornering lamp 20, and has a light distribution pattern having a clear cut-off line. Form.

  Here, the bank angle interlocking cornering lamp 20 is applied to the two-wheeled vehicle lamp system 10 so that a light distribution pattern having a horizontal cut-off line is irradiated to the side of the passing beam when the two-wheeled vehicle is inclined at the second bank angle φ2. Assembled.

  FIG. 5 is a diagram for explaining light emitted from the bank angle interlocking cornering lamp 20 when the second filament 28 is turned on. As described above, the second filament 28 is turned on when the bank angle φ of the motorcycle is equal to or larger than the first bank angle φ1.

  Since the second filament 28 is disposed at a position above the first filament 27 spaced from the focal point F of the paraboloid of the reflector 24, the light emitted from the second filament 28 is forwarded by the reflecting surface 32. Reflected obliquely downward. Therefore, when the second filament 28 is turned on, the light that illuminates the front side of the vehicle is emitted as compared with the case where the first filament 27 is turned on. Thereby, even if it is a case where the 2nd filament 28 which is not arrange | positioned at the position of the focus F is lighted, the situation where the driver of an oncoming vehicle feels dazzling can be prevented.

  Hereinafter, the light distribution pattern using the two-wheeled vehicle lamp system 10 according to the present embodiment and the operation effect thereof will be specifically described. Here, a case where the first bank angle φ1 is 10 degrees and the second bank angle φ2 is 20 degrees will be described.

  FIGS. 6A and 6B are diagrams for explaining a light distribution pattern when the passing beam lamp 12 and the left turn signal interlocking cornering lamp 16L are turned on. FIG. 6A shows an isoilluminance curve on the road surface in front of the vehicle, and FIG. 6B shows an isoilluminance curve on a virtual vertical screen arranged at a position 10 m ahead of the vehicle.

  For example, when the rider operates a winker operation switch provided on the two-wheeler before a left turn on a curve such as an intersection, the operation switch outputs a winker approach signal to the control unit 30. The control unit 30 outputs a lighting instruction to the left turn signal interlocking cornering lamp 16L according to the turn signal, the left turn signal interlocking cornering lamp 16L is turned on, and light is irradiated forward.

  Then, as shown in FIG. 6B, the left turn signal interlocking cornering lamp 16L is irradiated on the left side of the light distribution pattern CP1 having the cut-off line CL1 formed by the low beam irradiated from the low beam lamp 12. A light distribution pattern CP2 formed by light is projected. The cut-off line CL2 of the light distribution pattern CP2 is a horizontal cut-off line. In addition, referring to FIG. 6A, light is irradiated to the vicinity of approximately 55 m diagonally left forward. As described above, when the two-wheeled vehicle is irradiated with light on the left turn side, that is, on the traveling direction side, immediately before the left turn, the distance visibility on the traveling side of the rider is enhanced.

  FIGS. 7A and 7B are diagrams for explaining a light distribution pattern when the second filament 28 of the passing beam lamp 12 and the left bank angle interlocking cornering lamp 20L is turned on. FIG. 7A shows an isoillumination curve on the road surface in front of the vehicle, and FIG. 7B shows an isoillumination curve on a virtual vertical screen disposed at a position 10 m ahead of the vehicle.

  When the rider actually tilts the motorcycle and turns left on the left curve, the bank angle sensor provided on the motorcycle detects the bank angle of the motorcycle and outputs a bank angle signal corresponding to the bank angle to the control unit 30. . The controller 30 instructs the second filament 28 of the left bank angle interlocking cornering lamp 20L to be lit when the bank angle φ indicated by the bank angle signal is 10 degrees or more.

  FIGS. 7A and 7B show a case where the bank angle φ of the two-wheeled vehicle is 10 degrees. In this state, the motorcycle lamp system 10 is rotated 10 degrees counterclockwise as a whole, and therefore, as shown in FIG. 7B, the light distribution pattern CP1 formed by the passing beam is on the left side of the cutoff line CL1. However, the light distribution pattern CP3 is irradiated from the left bank angle interlocking cornering lamp 20L to the side of the light distribution pattern CP1 so as to fill the space between the cut-off line CL1 and the horizontal line H. The cut-off line CL3 of the light distribution pattern CP3 is a so-called blurred cut-off line with varying illuminance. In addition, referring to FIG. 7A, light is irradiated to the vicinity of about 30 m diagonally left forward of the two-wheeled vehicle. Thereby, even in the initial cornering stage immediately after the two-wheeled vehicle starts making a left turn, light is appropriately irradiated on the left turn side, that is, the traveling direction side, and the distance visibility on the traveling side of the rider can be maintained.

  FIGS. 8A and 8B are diagrams for explaining a light distribution pattern when the first filament 27 of the passing beam lamp 12 and the left bank angle interlocking cornering lamp 20L is turned on. FIG. 8A shows an isoilluminance curve on the road surface in front of the vehicle, and FIG. 8B shows an isoilluminance curve on a virtual vertical screen arranged at a position 10 m ahead of the vehicle.

  When the rider tries to turn left by turning the motorcycle further than 10 degrees on the left curve and the bank angle φ becomes 20 degrees or more, the control unit 30 turns off the first filament 27 and turns the left bank angle interlocking cornering lamp. An instruction is given to light the 20 L first filament 27.

  FIGS. 8A and 8B show a case where the bank angle φ of the motorcycle is 20 degrees. In this state, since the motorcycle lamp system 10 is rotated 20 degrees counterclockwise as a whole, as shown in FIG. 8B, the light distribution pattern CP1 formed by the passing beam is on the left side of the cutoff line CL1. However, the light distribution pattern CP4 is irradiated from the left bank angle interlocking cornering lamp 20L to the side of the light distribution pattern CP1 so as to fill the space between the cut-off line CL1 and the horizontal line H. The cut-off line CL4 of the light distribution pattern CP4 is a clear horizontal cut-off line. In addition, referring to FIG. 8A, light is irradiated up to about 40 m diagonally to the left front of the motorcycle. As a result, in the middle stage of cornering, where the bank angle is generally large and the time is long, light with a light distribution pattern with a clear cut-off line is irradiated on the left turn side, that is, the traveling direction side, and the rider's traveling side is visually recognized in the distance Sex can be maintained.

  Thus, according to the motorcycle lamp system 10 according to the present embodiment, the bank angle interlocking cornering lamp 20 has two light distribution patterns CP3 and CP4 on the side of the passing beam according to the bank angle φ of the motorcycle. Various light distribution patterns can be irradiated. Accordingly, it is possible to continue to ensure far visibility by irradiating the rider with sufficient light during cornering.

  Here, the bank angle interlocking cornering lamp 20 can irradiate two kinds of light distribution patterns only by switching the lighting of the first filament 27 and the second filament 28. Since two types of light distribution patterns can be irradiated with a relatively simple configuration in which the first filament 27 and the second filament 28 are selectively turned on, the cost can be reduced.

  Further, in the bank angle interlocking cornering lamp 20 according to the present embodiment, the first filament 27 is disposed at the focal point F of the rotary paraboloid of the reflector 24 and the second filament 28 is disposed at a position away from the focal point F. It was configured as follows. Therefore, when the first filament is turned on, a light distribution pattern having a clear cut-off line is irradiated. However, when the second filament 28 is turned on, the light distribution pattern CP3 in FIG. As described above, a light distribution pattern in which the cutoff line is blurred is irradiated. When cornering, the vehicle body is gradually tilted, but instead of suddenly irradiating a light distribution pattern with a clear cut-off line, the cut-off line once irradiates a blurred light distribution pattern, and then a clear cut-off line is applied. By irradiating the light distribution pattern, it becomes easier for the rider's eyes to get used to changes in brightness, and thus visibility can be improved.

  In addition, in the two-wheeled vehicle lamp system 10 according to the present embodiment, the turn signal interlocking cornering lamp 16 is provided in addition to the bank angle interlocking cornering lamp 20. Thereby, even if it is in the state which is not banking before a two-wheeled vehicle approachs a corner, light can be irradiated to a corner side and the visibility on a corner side can be improved.

  The light distribution pattern formed when the second filament 28 of the bank angle interlocking cornering lamp 20 is turned on can be changed by changing the distance from the focal point F to the second filament 28. For example, the longer the distance from the focal point F to the second filament 28, the more the light distribution pattern that irradiates light toward the front side of the vehicle can be formed.

  The present invention has been described above based on the embodiment. It should be understood by those skilled in the art that these embodiments are exemplifications, and that various modifications can be made to the combination of each component and each processing process, and such modifications are also within the scope of the present invention.

  In the above-described embodiment, the double filament bulb is used as the light source of the bank angle interlocking cornering lamp 20, but the light source is not limited to this. For example, two single filament bulbs may be used. In this case, the filament of one bulb may be arranged at the position of the focal point F of the paraboloid of the reflector, and the filament of the other bulb may be arranged at an upper position away from the focal point F. .

  In the above-described embodiment, the second filament 28 serving as the second light source is positioned above the first filament 27 serving as the first light source. However, the second filament 28 is positioned away from the first filament 27. If the filament 28 is disposed, two types of light distribution patterns can be irradiated.

  Further, in the above-described embodiment, the bank angle interlocking cornering lamp 20 is a parabolic lamp, but is not limited thereto, and may be a projector type lamp, for example.

1 is a schematic front view of a lamp system for a motorcycle according to an embodiment of the present invention. 1 is a schematic horizontal sectional view of a two-wheeled vehicle lamp system according to an embodiment of the present invention. It is a vertical sectional view of a bank angle interlocking cornering lamp according to an embodiment of the present invention. It is a figure for demonstrating the light irradiated from a bank angle interlocking cornering lamp when a 1st filament is made to light. It is a figure for demonstrating the light irradiated from a bank angle interlocking cornering lamp when a 2nd filament is lighted. FIGS. 6A and 6B are diagrams for explaining the light distribution pattern when the passing beam lamp and the left turn signal interlocking cornering lamp are turned on. FIGS. 7A and 7B are diagrams for explaining a light distribution pattern when the second filaments of the passing beam lamp and the left bank angle interlocking cornering lamp are turned on. FIGS. 8A and 8B are diagrams for explaining the light distribution pattern when the first filament of the passing beam lamp and the left bank angle interlocking cornering lamp are turned on.

Explanation of symbols

  10 motorcycle lamp system, 12 passing beam lamp, 14 traveling beam lamp, 16R right turn signal interlocking cornering lamp, 16L left turn signal interlocking cornering lamp, 18 lamp body, 20R right bank angle interlocking cornering lamp, 20L left bank angle interlocking cornering Lamp, 22 cover, 24 reflector, 26 bulb, 27 first filament, 28 second filament, 30 control unit, 32 reflecting surface.

Claims (5)

A lamp system for a motorcycle, comprising: a low beam lamp for irradiating a low beam; and a cornering lamp arranged such that an optical axis is inclined at a predetermined angle from the optical axis of the low beam lamp,
The cornering lamp is
A reflector having a reflecting surface formed with a rotating paraboloid having a central axis as the optical axis of the cornering lamp as a reference surface;
A first light source disposed at the focal point of the paraboloid of the reflector;
A second light source disposed at a position spaced from the focal point of the rotating paraboloid of the reflector;
A control unit for controlling lighting of the first light source and the second light source;
A two-wheeled vehicle lamp system comprising:   2. The two-wheeled vehicle lamp system according to claim 1, wherein the second light source is disposed at a position above the first light source.   The cornering lamp has a double filament bulb containing first and second filaments, wherein the first filament constitutes the first light source, and the second filament constitutes the second light source. The motorcycle lamp system according to claim 1 or 2.   The controller turns on the second light source when the bank angle of the vehicle body is greater than or equal to a predetermined first bank angle, and when the bank angle of the vehicle body is greater than or equal to a predetermined second bank angle greater than the first bank angle. The motorcycle lamp system according to any one of claims 1 to 3, wherein the first light source is turned on.   The motorcycle lamp system according to any one of claims 1 to 4, further comprising a turn signal signal interlocking cornering lamp that irradiates light to a side of the passing beam in response to a turn signal.

Images