JP2003011867A - Headlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the visibility of a bicycle's position for automobile drivers and pedestrians, etc. SOLUTION: A reflector 13 having an electric bulb 15 disposed at approximately its center as a main light is provided within a body case having side eyes 10 formed on its sides, and recess parts 16 allowing the light of the bulb 15 to leak to the side eyes 10 are formed in the reflector 13. An LED 17 as an auxiliary light is disposed within the recess part 16, with at least a portion of the LED protruding outwards, and the LED 17 is held by a translucent holder 25 to enable light entering the holder 25 from the LED 17 to leak via the body case 7. Because the entire holder appears to emit light via the body case because of the light entering from the LED, the visibility of the bicycle's position for automobile drivers and pedestrians or the like can be enhanced by the use of the holder holding the LED.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a headlight mainly used for bicycles.

[0002]

2. Description of the Related Art As a conventional bicycle lighting device, as shown in Japanese Patent Application Laid-Open No. 8-133151 (B62J6 / 02), in a main body case having side eyes formed on its side surface,
By providing a reflector plate with a light bulb arranged in the approximate center and letting the light of the light bulb pass through the holes formed in this reflector plate to the side eye and leak from the side eye, the light from the vehicle can be seen not only from the front but also from the side. It is known that the position of a bicycle is visually recognized by a driver, a pedestrian, or the like.

However, when the vehicle travels at a low speed, the output of the generator is reduced, the light quantity of the light bulb is reduced, and it is difficult for the driver of the automobile or the pedestrian to visually recognize the position of the bicycle.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a bicycle lighting device capable of improving the visibility of the position of the bicycle to the driver or pedestrian of the automobile.

[0005]

[Means for Solving the Problems] Means for solving the above-mentioned problems are a main body case having side eyes formed on the side surface, a main case provided in the main body case, and a main light-emitting body disposed substantially at the center. A reflecting plate, a concave portion formed on the reflecting plate for leaking the light of the main light emitting body to the side eye, a sub light emitting body disposed so as to project at least a part in the concave portion, and the sub light emitting body. A light-transmissive holder for holding the light-emitting body is provided so that light entering the holder from the sub-light-emitting body can leak through the main body case.

As a result, the light entering the holder leaks out of the main body case through the main body case, and the holder looks shining. Therefore, by using the holder for holding the sub-emitter, an automobile driver or a pedestrian can use it. The visibility of the position of the bicycle relative to can be improved.

In the above structure, at least a part of the holder is located in the recess.

Thus, the light from the sub-emitter that leaks from the holder can be leaked to the outside of the main body case using the side eyes.

Further, it is desirable that the holder is formed in a frosted glass shape.

As a result, the light of the sub-emitter that has entered the holder is repeatedly reflected by the holder, and the holder appears to shine brighter, making it easier for the driver or pedestrian of the vehicle to notice.

The holder holds the sub light emitter in a state of surrounding the outer circumference of the light emitting portion of the sub light emitter.

As a result, when viewed from the side, the portion of the holder that covers the light emitting portion of the sub light emitting body appears to be shining by the light that has entered the holder from the sub light emitting body, and only the light emitting portion of the sub light emitting body is laterally viewed. It is possible to make it appear to shine in a wider range than when viewed from above, and it is possible to make the holder, together with the sub-emitter, shine and to appear to shine in a wider range when viewed from the front. .

Further, it is preferable that a surface of the recess facing the front surface of the main body case is formed into a parabolic surface.

As a result, the light emitted from the sub-emitter can be reflected by the parabolic surface to increase the amount of light radiated forward, and an LED or the like having a high light-collecting property can be used as the sub-emitter. , It is possible to make it appear to shine over a wider area when viewed from the front. Moreover, the holder holds the optical axis of the sub-emitter in a state in which the optical axis of the sub-emitter is directed upward from the optical axis of the main emitter.

With this, the light of the sub-emitter can be emitted in a direction closer to the eyes of the driver or pedestrian of the vehicle, and the driver or pedestrian of the vehicle can easily notice from the front side.

It is desirable that the sub-emitter be an LED.

As a result, the LED consumes relatively little power, and even if the power supplied to the headlamp is reduced, the sub-emitter emits relatively bright light, so that the power source of the headlamp generates electricity by rotating the wheels. The auxiliary light-emitting body shines comparatively brightly even when the vehicle runs at a low speed, and this light can ensure the visibility of the position of the bicycle to the driver of the automobile, pedestrians, and the like.

[0018]

1 to 6 show a first embodiment of the present invention, which will be described below with reference to these drawings.

Reference numeral 1 denotes a bicycle lighting device, which comprises a headlight 2 and a hub dynamo 3 as a generator for supplying electric power to the headlight 2, as shown in FIG. The headlight 2 has a bracket 4 on the side surface, and the bracket 4 allows the front fork 6 of the bicycle 5 to be attached to the optical axis X of the light bulb 15 described later.
Can be attached diagonally downward. Here, the hub dynamo 3 is disclosed in JP-A-3-258673 (B60Q1).
/ 02), and detailed description is omitted here.

Reference numeral 7 denotes a main body case which is an outer shell of the headlight 2.
As shown in FIGS. 1 to 3, a semitransparent head case 9 having an opening on the front side and windows 8 formed on both sides of the opening side, and the window 8
Side eyes 10 that are fitted to the head caps 12 formed on both sides.

Reference numeral 13 denotes a parabolic reflector disposed on the opening side of the head case 9, fitted on the inner surface of the head cap 12, and attached to the head case 9 together with the head cap 12 with a screw 11. A socket 14 is provided substantially in the center of the reflection plate 13, and a light bulb 15 (a small incandescent light bulb having a rating of about 6V and about 2.4W) as a main light emitter is mounted on the socket 14.

Reference numerals 16 denote side eyes 10 on both sides of the reflector 13.
The concave portions 16 are formed corresponding to the above, and the concave portion 16 has a surface facing the head cap 12 as shown in FIG.
The central axis (almost the same direction as the optical axis Y of the LED 17) is the bulb 15.
The parabolic surface 19 faces upward from the optical axis X of. Further, among these recesses 16, a vertical hole 18 is formed in the recess 16 on the side opposite to the bracket 4.

Reference numeral 17 denotes a blue LED 17 as a sub light emitting body which protrudes into the concave portion 16 through the hole 18 and is capable of emitting light with a relatively small electric power (30 to 40 mA, about 2 V).

Reference numeral 20 denotes a partition plate that partitions the interior of the headlight 2 into front and rear, and is attached to the head case 9 with screws 21 and 22. The electric power from the hub dynamo 3 is applied to the screw 21 by the electric bulb 15
Power supply plate 23 for supplying to
A lead wire (not shown) grounded to the vehicle body of the bicycle 5 via the bracket 4 and a lead wire 24 connected to the socket 14 of the light bulb 15 are attached to the.

As shown in FIG. 2, a holder 25 is attached to the partition plate 20 on the side opposite to the bracket 4, and is formed of a light-transmissive member having a frosted glass surface. This holder 25 is an LED as shown in FIG.
17 is held with its optical axis Y facing upward from the optical axis X of the light bulb 15 in the same manner as the central axis of the parabolic surface 19 of the recess 16.

Reference numeral 26 denotes a control board disposed behind the partition plate 20 in the head case 9, which includes optical sensors Cds, which will be described later.
A control component such as a charging capacitor C3 is mounted.

Next, the control circuit of the bicycle lighting device 1 will be described with reference to the block circuit diagram of FIG. 5 and the circuit diagram of FIG.

Power is supplied to the hub dynamo 3 via the rectifier circuit 27, the constant voltage circuit 28, and the lighting / extinguishing circuit 29 to the bulb 15, and the charging circuit 30 to the LED 17.

The rectifier circuit 27 is composed of a diode D1 and a capacitor C1. The AC voltage from the hub dynamo 3 is rectified by the diode D1 and smoothed by the capacitor C1 to obtain a DC voltage.

The constant voltage circuit 28 is composed of a transistor Q1, a bias resistor R1 and a zener diode ZD1 and converts the DC voltage rectified by the rectifier circuit 27 into a constant voltage.

The lighting / extinguishing circuit 29 includes resistors R2, R3, and R.
4 and an optical sensor Cds 31 including an optical sensor Cds
And a comparator circuit IC1 composed of comparators ICA and ICB
And R6 connected to the output side of the comparator ICA and the resistor R
6 and a resistor R5 connected to the negative side of the comparator ICB
And a triac TRA1 connected to the output side of the comparator ICB via a resistor R7.

The constant voltage circuit 2 is connected to the optical sensor detection circuit 31.
The constant voltage from 8 is supplied between the resistor R2 and the resistor R3, and is also supplied between the resistor R4 and the optical sensor Cds. Then, the reference voltage at the connection point of the resistors R2 and R3 becomes the comparator ICA.
Of the resistance R4 and the photosensor Cds is applied to the negative side of the comparator ICA.

The resistance value of the optical sensor Cds changes according to the brightness of the surroundings, and the comparator circuit IC1 turns on / off the triac TRA1 due to the change of the resistance value of the optical sensor Cds.

The charging circuit 30 includes a rectifying diode D2,
It is composed of a constant voltage circuit 32 including a transistor Q2, a bias resistor R8, and a zener diode ZD2, and a charging capacitor C3.

The AC voltage from the hub dynamo 3 is rectified by the rectifier diode D2 and made constant by the constant voltage circuit 32. The constant voltage is supplied to the charging capacitor C3 (here, an electric double layer capacitor) to be charged and is also supplied between the resistor R9 and the LED 17.

Next, the lighting operation of the headlight 2 in the bicycle lighting device 1 will be described.

When the wheels 5a rotate as the bicycle 5 travels, the hub dynamo 3 generates electric power, and the generated electric power is supplied to the lighting / extinguishing circuit 29 via the rectifier circuit 27 and the constant voltage circuit 28, and to the charging circuit 30. Supplied.

When the lighting / extinguishing circuit 29 detects that the light sensor Cds has a predetermined brightness (here, the brightness between the daytime and twilight), the triac TRA1 is turned off and the light bulb 15 is turned on. Shut off the power supply. This prevents the bulb 15 from turning on when it is not needed and shortening the life of the bulb 15.

When the ambient light becomes dark and the light sensor Cds detects that the brightness is lower than the preset predetermined brightness, the lighting / extinguishing circuit 29 turns on the triac TRA1 to supply the electric power from the hub dynamo 3 to the bulb 15. And the light bulb 15 is turned on. The light from the light bulb 15 illuminates the front side obliquely downward as shown by the arrow X in FIG. 1, and as shown in FIG. 2, a part of the light passes through the concave portion 16 to the side eye 10 and leaks from the side eye 10. To do.

On the other hand, the electric power supplied to the charging circuit 30 is stored in the charging capacitor C3 in the charging circuit 30 and also supplied to the LED 17, so that the LED 17 is constantly lit in blue during traveling.

The light from the LED 17 leaks from the recess 16 through the side eye 10 and the parabolic surface 1 of the recess 16 is exposed.
As shown in FIG. 1, the light reflected by 9 is emitted upward from the light bulb 15. The amount of light radiated to the front side increases due to the light reflected by the parabolic surface 19, and even when the LED 17 having a high light converging property is used as a light source, the headlamp 2 has a relatively wide range when viewed from the front side. Becomes brighter. This makes it easier for the light of the LED 17 to be caught by the eyes of a driver of a vehicle, a pedestrian or the like, and the position of the bicycle 5 can be easily visually recognized.

At this time, since the light of the LED 17 is emitted toward the upper side of the light of the light bulb 15, the light of the LED 17 can be emitted in a direction closer to the eyes of a driver or a pedestrian of an automobile, and the eyes can be more visible. It becomes easy to stay in.

Further, since the LED 17 is the blue LED 17, the blue light emitted from the LED 17 is more noticeable than the lights of other colors, and the light of the LED 17 allows a driver of a car, a pedestrian, etc. The position of can be easily recognized.

The light of the LED 17 also enters the holder 25 having a light transmitting property. The light that has entered the holder 25 is leaked from the entire holder 25 while being repeatedly reflected in the holder 25 because the holder 25 is formed in a frosted glass shape. The light leaking from the holder 25 allows the holder 25 to appear to shine brightly from the side surface side and the back surface side of the main body case 7 through the semitransparent head case 9. As a result, it is possible to improve the visibility of the position of the bicycle 5 from the side and the back of the driver or pedestrian of the automobile by using the holder 25 holding the LED 17.

By the way, the vehicle speed becomes slow and the hub dynamo 3
When the output of the light source 15 decreases, the power supplied to the light bulb 15 and the LED 17 decreases, and the light of the light bulb 15 becomes dark. on the other hand,
The LED 17 can emit light with a relatively small electric power, and the charged electric power is supplied to the charging capacitor C3.
It emits relatively bright light.

When stopped, the electric power is not supplied to the light bulb 15 and the light is turned off, while the LED 17 is supplied with the electric power charged in the charging capacitor C3 and emits light. At this time, since the power consumed by the LED 17 is small, the LED 17 is turned on for a relatively long time.

As described above, the LED 17 emits a relatively bright light even when the vehicle travels at a low speed, and emits a relatively long time even after the vehicle is stopped. Therefore, the light of the LED 17 causes a bicycle for a driver or a pedestrian of a car. The visibility of the position 5 can be secured.

A second embodiment of the present invention is shown in FIGS. 7 and 8 and will be described with reference to these figures. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The LED 17 is arranged so as to project into the recess 16 of the reflecting plate 13 as in the first embodiment. The holder 51 for holding the LED 17 is formed of a translucent member, and has a tip end side protruding into the recess 16 and surrounding the outer periphery of the light emitting portion 17a of the LED 17 with the tip end side.

When the LED 17 emits light, the light from the LED 17 is emitted to the front side and the light emitting portion 17a of the LED 17 is emitted.
The light from the LED 17 enters the holder 51 from the outer periphery of the. The light that has entered the holder 51 is repeatedly reflected in the frosted glass-shaped holder 51 and leaks from almost the entire holder 51.

Of the light leaking from the holder 51, the light leaking from the portion projecting into the concave portion 16 of the holder 51 comes to leak out of the main body case 7 through the side eye 10, and the side eye 10 is exposed. Through this, the portion of the holder 51 protruding into the recess 16 becomes visible. In this way, by protruding a part of the holder 51 into the recess 16, light of the LED 17 leaking from the holder 51 can be leaked to the outside of the main body case 7 using the side eyes 10. In addition, since the LED 17 is covered by the portion of the holder 51 protruding into the recess 16, the LED 17 can be seen to shine in a wider range than when only the LED 17 is viewed from the side. And pedestrians can easily notice.

Further, the light leaking from the portion of the holder 51 protruding into the recess 16 is not only leaked to the outside of the main body case 7 through the side eye 10 as described above, but a part of the light is parabolic in the recess 16. The light is reflected forward on the surface 19. As a result, the amount of light emitted to the front side increases, and even if the LED 17 having a high light-converging property is the light source,
Light causes a relatively wide area on the front surface of the headlight 2 to appear to shine when viewed from the front side.

Light leaking from the portion of the holder 51 on the rear side of the reflection plate 13 leaks to the outside of the main body case 7 through the semitransparent head case 9 and is passed through the main body case 7 from the side or the rear side. The holder 51 will appear to shine. This makes it possible to improve the visibility of the position of the bicycle 5 from the side and the back of the vehicle driver or pedestrian using the holder 25 holding the LEDs 17.

Although the hub dynamo is used as the power source in the first and second embodiments, other generators may be used, or another power source such as a battery may be used.

Further, by constructing the main body case 7 with the semitransparent head case 9 and the transparent head cap 12, the light of the LED 17 leaking from the holder 25 is transmitted to the main body case 7.
Although it is possible to leak to the outside, the entire body case 7 does not need to have a light-transmitting property, and a light-transmitting window or the like may be formed on the surface to be leaked.

[0056]

According to the first aspect of the present invention, since the light entering the holder leaks to the outside of the main body case through the main body case, the holder can be seen to shine through the main body case. It is possible to improve the visibility of the position of the bicycle with respect to the driver or pedestrian of the automobile by using the holder that holds the sub light emitter.

According to the second aspect of the present invention, the light from the sub light emitting body which leaks from the holder can be leaked to the outside of the main body case using the side eyes.

According to the third aspect of the present invention, since the light of the sub-emitter entering the holder is repeatedly reflected by the holder,
The holder appears to shine brighter, and can be easily noticed by a driver of a vehicle, a pedestrian, or the like.

According to claim 4 of the present invention, when viewed from the side, the portion of the holder that covers the light emitting portion of the sub-emitter appears to be shining by the light entering the holder from the sub-emitter, and the sub-emitter It is possible to make only the light-emitting part of the device shine in a wider range than when viewed from the side, and even when viewed from the front, the holder and the sub-emitter appear to shine and shine in a wider range. It can be made visible and can be easily noticed by a driver of a vehicle, a pedestrian, or the like.

According to the fifth aspect of the present invention, the light emitted from the sub-emitter can be reflected by the parabolic surface to increase the amount of light radiated forward, and the LED or the like having a high light-collecting property can be sub-emits. Even when it is used as a body, it looks shiny in a wider area when viewed from the front, and can be easily noticed by a driver of a vehicle, a pedestrian, or the like.

According to claim 6 of the present invention, the light of the sub-emitter can be emitted in a direction closer to the eyes of the driver or pedestrian of the automobile, and the driver or the pedestrian of the automobile can be illuminated from the front side. You can make it easier to notice.

According to claim 7 of the present invention, since the LED consumes relatively little power, the sub-emitter emits relatively bright light even if the power supplied to the headlamp is reduced. The power source is a generator that is generated by rotation of the wheels, and the visibility of the position of the bicycle to the driver or pedestrian of the automobile can be ensured by the light of the sub-emitter even when traveling at low speed.

[Brief description of drawings]

FIG. 1 is a side view of the vicinity of front wheels of a bicycle to which a headlight according to an embodiment of the present invention is attached.

FIG. 2 is a plan sectional view of the headlight.

FIG. 3 is a side sectional view of the headlight.

FIG. 4 is a front view of the headlight with a head cap removed.

FIG. 5 is a block circuit diagram of a bicycle lighting device having the same headlight.

FIG. 6 is a circuit diagram of a bicycle lighting device having the headlight.

FIG. 7 is a side sectional view of a headlamp showing a second embodiment of the present invention.

FIG. 8 is a side view in which the headlight is partially broken.

[Explanation of symbols]

7 Body case 10 side eyes 13 Reflector 15 Light bulb (main light emitter) 16 recess 17 LED (sub-illuminator) 19 Parabolic surface 25 holder X bulb optical axis Optical axis of Y LED

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Claims (7)

[Claims] 1. A main body case having a side eye formed on a side surface thereof, a reflector plate provided in the main body case and having a main light emitter disposed substantially in the center thereof, and the main light emitting member formed on the reflector plate. A recess for leaking light from the body to the side eye, a sub-emitter disposed so as to project at least a part in the recess, and a translucent holder for holding the sub-emitter. A headlight characterized in that light entering the holder from the sub-emitter can be leaked through a main body case. 2. The headlight according to claim 1, wherein at least a part of the holder is located in the recess. 3. The headlight according to claim 1, wherein the holder is formed in a frosted glass shape. 4. The headlight according to claim 1, wherein the holder holds the sub light emitter in a state of surrounding the outer circumference of the light emitting portion of the sub light emitter. 5. The headlight according to claim 1, wherein a surface of the recess facing the front surface of the main body case is formed as a parabolic surface. 6. The holder according to claim 1, wherein the holder holds the optical axis of the sub light-emitting body in a state in which the optical axis of the sub-light emitting body is directed upward from the optical axis of the main light emitting body. Headlight. 7. The headlight according to claim 1, wherein the sub light emitter is an LED.