JP4376528B2 - Motorcycle front lighting system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle lighting device using a light emitting diode.
[0002]
[Prior art]
In recent years, an increasing number of vehicle lighting devices using light emitting diodes as light sources. In such a lighting device, a plurality of light emitting diodes are used in a single lighting device in order to secure a light amount. However, each light emitting diode has a low power consumption and a long life, and the shape of the lamp body is high. Therefore, it is particularly suitable for the case where the arrangement space of the lamp body is limited such as a door mirror built-in type door mirror or a motorcycle.
By the way, the forward voltage required to turn on the light emitting diode is sufficiently lower than the vehicle power supply voltage. Therefore, the voltage applied to the light emitting diode is usually reduced by stepping down the vehicle power supply voltage with a series resistor provided for each light emitting diode. It is adjusted (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 63-222984
[Problems to be solved by the invention]
However, in the conventional vehicle lighting device, the temperature of the light emitting diode is likely to rise due to the heat generated by the series resistance. When the temperature of the light emitting diode becomes high, the forward voltage decreases, and as a result, a large amount of forward current flows through the light emitting diode to increase power consumption and shorten the operating life of the light emitting diode. Moreover, if the space | interval of each component is expanded in order to improve heat dissipation, it will enlarge a lamp body, and will become a big subject when the arrangement space of a lamp body is limited.
Therefore, the present invention provides a vehicle lighting device that uses a light-emitting diode as a light source, saves power, has a long life, and can reduce the size of the lamp body.
[0005]
[Means for Solving the Problems]
As a means for solving the above problems, the invention described in claim 1 is a lamp bracket (for example, the lamp bracket 10 in the embodiment) for supporting a headlamp (for example, the headlamp 8 in the embodiment) on the front part of the motorcycle. And the lamp bracket is formed by aluminum die casting, and the blinker is formed of a light emitting diode (LED). for example possess the light-emitting diode 25) a fixture as a light source (e.g., light body 23) in the embodiment of the embodiment, the emission voltage adjusting means voltage for adjusting the applied to the diode (e.g. resistance in the embodiment circuit 30) is provided, the voltage adjusting means to the outside of the lamp body Together apart providing, characterized in that the attachment accommodating the voltage adjusting means to the housing portion provided on the inner side of the lamp bracket behind the blinker (accommodating portion 32 in the example embodiment).
[0006]
According to this vehicular lighting device, the voltage applied to the light emitting diode is adjusted by the voltage adjusting means separated outside the lamp body, so that the temperature of the light emitting diode in the lamp body can be adjusted even if the voltage adjusting means generates heat. Without increasing, it is possible to stabilize the forward voltage and keep the lighting forward current in an appropriate range.
In addition, since the amount of heat generated is small, it is possible to arrange the parts closely in the lamp body, and it is possible to suppress the weight of the lamp by separating the voltage adjusting means outside the lamp body.
Further, the support member that supports the lighting device and the voltage adjusting means can be integrally configured, and the parts for supporting the voltage adjusting means and the assembling work thereof can be reduced. Further, if the support member is made of a material having a high heat transfer property such as metal, the support member can be used as a heat sink and the heat dissipation of the voltage adjusting means can be improved.
[0008]
The invention described in claim 2 is characterized in that the accommodating portion accommodating the voltage adjusting means is sealed with a mold resin.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 2 denotes a body frame of the motorcycle 1, and a head pipe 3 is provided at the front end of the body frame 2. A stem pipe 5 fixed integrally with the bottom bridge 4 is penetrated through the head pipe 3 so as to be rotatable about an axis, and a top bridge 6 is attached to a stem nut 6A at a protruding portion of the stem pipe 5 from the head pipe 3. It is fixed by. The top bridge 6, the stem pipe 5, and the bottom bridge 4 mainly constitute a steering stem 7 that is pivotally supported by the head pipe 3. A front fork (not shown) is fitted and fixed in the fitting holes formed in the left and right ends of the top bridge 6 and the bottom bridge 4.
[0010]
A circular single-lamp headlamp 8 is disposed in front of the head pipe 3. The headlamp 8 is held so as to be sandwiched between the left and right lamp brackets 10 and 10, and is attached to the steering stem 7 via each lamp bracket 10. The front end of each lamp bracket 10 is provided with an insertion hole 11 on an axis parallel to the left-right direction, and fixing bolts 12 inserted into the respective insertion holes 11 are fixed to the fixing nut holes 9, 9 on the left and right outer sides of the headlamp 8. The headlamp 8 and the lamp brackets 10 are fixed integrally. In addition, by loosening each fixing bolt 12, the headlamp 8 can be tilted up and down and the optical axis can be adjusted in the vertical direction.
[0011]
Referring to FIG. 2, each lamp bracket 10 is made of aluminum die-cast, and a mounting arm 14 extends upward and rearward from the upper front side of the substantially triangular main body 13 toward the inner side in the vehicle width direction. The connecting stay 15 is extended from the upper rear side of the main body 13 to the upper rear side and to the inner side in the vehicle width direction. A support arm 16 extends downward and toward the inner side in the vehicle width direction from the lower rear side of the main body 13. The insertion hole 11 for supporting the headlamp 8 is formed in the front part of the main body 13, and the insertion hole 17 for attaching the front blinker 20 is formed in a substantially central part.
[0012]
A connecting seat surface 15 a and a connecting hole 15 b are formed at the upper end of each connecting stay 15, and bosses 6 a and 6 a corresponding to these are provided on the front surface of the top bridge 6. And the upper part of the lamp bracket 10 is fixed to the top bridge 6 by inserting the connecting bolt 15c into each connecting hole 15b from the front and fastening it to the corresponding boss 6a. On the other hand, the lower end of each support arm 16 is provided with a receiving seat surface 16a formed substantially parallel to the upper surface of the bottom bridge 4 and a projecting shaft 16b projecting downward from the receiving seat surface 16a. Boss portions 4 a and 4 a are provided on both sides of the front portion of the bottom bridge 4. The lamp bracket 10 is supported by the bottom bridge 4 from below in a state where the protruding shaft 16b is fitted to the corresponding boss portion 4a and the receiving seat surface 16a is in contact with the upper surface of the boss portion 4a. Thus, each lamp bracket 10 is attached to the steering stem 7. A mounting seat surface 14a is slightly tilted forward at the upper end of each mounting arm 14, and a meter unit (not shown) is attached to each mounting seat surface 14a.
[0013]
Each insertion hole 11, 17 of each lamp bracket 10 is formed at the bottom of a seat surface portion that is recessed in the vehicle width direction on the outer surface of the main body 13. Here, the inner side in the vehicle width direction of the main body 13 of each lamp bracket 10 is thinned except for the outer wall 18 and its outer peripheral wall 19 and the cylindrical walls 11a and 17a forming the respective seating surface portions. . In addition, the same thickness reduction is given also to the inner side of the support arm 14 and the attachment arm 14 in the vehicle width direction.
[0014]
Each front blinker 20 has a plurality of light emitting diodes (so-called LEDs) 25 mounted on a substrate 24 as a light source in a lamp body 23 formed by a lens 21 and a lamp case 22. A connecting shaft portion 26 is provided on the inner side of the lamp body 23 in the vehicle width direction, and a screw portion 27 protruding from the tip of the connecting shaft portion 26 is inserted into the insertion hole 17 of the lamp bracket 10 and from the inside of the lamp bracket 10. The front blinker 20 is integrally fixed to the lamp bracket 10 by screwing the nut 28 onto the screw portion 27. The screw portion 27 is hollow and serves as an outlet for the harness 29 connected to each light emitting diode 25.
A resistor circuit (voltage adjusting means) for adjusting the voltage applied to each light emitting diode 25 of the front turn signal 20 on the same side is provided in the space formed by the lightening of the rear portion of each lamp bracket 10. 30 are each attached.
[0015]
Referring also to FIG. 3, a standing wall 31 that protrudes inward in the vehicle width direction from the outer wall 18 is provided at a portion spaced a predetermined distance forward from the outer peripheral wall 19 on the rear side of the lamp bracket 10. The range surrounded by the standing wall 31 and the outer peripheral wall 19 is the accommodating portion 32 of the resistance circuit 30. Here, since the resistance circuit 30 is smaller than the lamp bracket 10, the accommodating portion 32 has only a substantially rectangular range along the inner side of the rear outer peripheral wall 19. And after accommodating the resistance circuit 30 in the accommodating part 32, the lamp | ramp bracket 10 and the resistance circuit 30 are comprised integrally by sealing the accommodating part 32, for example with the urethane type resin M etc. FIG. In this state, the resistance circuit 30 is close to the outer wall 48 of the lamp bracket 10. Moreover, the harness 33 extended from the resistance circuit 30 and the harness 29 of the front turn signal 20 are electrically connected. The outer wall 18 of the lamp bracket 10 is formed with a step 18a that serves as an accent on reinforcement and appearance, and a part of the outer wall 18 is displaced inward in the vehicle width via the step 18a. 2 and 3 show the left lamp bracket 10 and the resistance circuit 30, and the right side is a right-and-left object.
[0016]
According to the above-described embodiment, the left and right front turn signals 20, 20 using the plurality of light emitting diodes 25 as light sources are supported by the pair of left and right lamp brackets 10, 10, respectively, and are accommodated in the accommodating portions 32 of the lamp brackets 10. Since each of the resistance circuits 30 corresponding to the front turn signal 20 on the same side is accommodated, each light emitting diode 25 of the front turn signal 20 and the resistance circuit 30 are spatially separated. Thereby, the temperature rise of the light emitting diode 25 due to heat generation of the resistor circuit 30 can be suppressed, the forward voltage can be stabilized and the lighting forward current can be kept in an appropriate range, and the light emitting diode 25 can be saved in power and have a long life. .
[0017]
Further, since each lamp bracket 10 is an aluminum die-cast product and is lightened on the inner side in the vehicle width direction, the weight can be significantly reduced, and the internal space of the lamp bracket 10 can be accommodated in the resistance circuit 30. The unit 32 can be used effectively. Here, the resistance circuit 30 is smaller than the lamp bracket 10, and the housing portion 32 can be secured without increasing the size of the lamp bracket 10. Therefore, the design flexibility of the lamp bracket 10 is not impaired. The lamp bracket 10 can be effectively used as a heat sink for the resistor circuit 30, and heat generated by the resistor circuit 30 adjacent to the outer wall 18 of the lamp bracket 10 can be radiated well.
[0018]
Furthermore, since the lamp bracket 10 and the resistance circuit 30 are integrally formed, the cost can be reduced without requiring parts and work for attaching the resistance circuit 30 to the vehicle body. Further, since the resistor circuit 30 is accommodated in the lamp bracket 10, it is advantageous in appearance without impairing the appearance, and particularly suitable for a vehicle such as the motorcycle 1 in which the periphery of the lamp bracket 10 is exposed. is there.
Furthermore, since the resistance circuit 30 is provided separately from the lamp body 23, the amount of heat generated in the lamp body 23 is reduced, and the components can be arranged densely. For this reason, it is possible to reduce the size of the front turn signal 20 and increase the degree of freedom in design. Note that the stepped portion 18a formed on the outer wall 18 of the lamp bracket 10 and the standing wall 31 are adapted to each other, so that the outer surface of the lamp bracket 10 can be prevented from sinking due to the formation of the standing wall 31. .
[0019]
Next, an example in which the present invention is applied to the rear part of the motorcycle 1 will be described as a second embodiment with reference to FIGS.
In FIG. 4, reference numeral 35 denotes a rear cowl of the motorcycle 1, and the rear cowl 35 covers a periphery of a seat rail (not shown) connected to the rear portion of the vehicle body frame 2. A seat 36 is disposed on the upper portion of the rear cowl 35, and a tail lamp 37 is disposed on the rear end. A pair of left and right license brackets 40, 40 extending toward the lower rear side are provided at the lower part of the rear cowl 35.
[0020]
Referring to FIG. 5, each license bracket 40 is made of aluminum die cast, and is long in the extending direction and tapered in side view. These license brackets 40 are spaced apart from each other in the left-right direction, and their upper ends pass through the lower part of the rear cowl 35 and are fixed to the seat rail. A rear turn signal 50 is attached to the upper part of each license bracket 40 using an insertion hole 41, and a license lamp 51 is attached to the lower end part so as to be sandwiched from the left and right. A license plate holder 52 is disposed at the irradiation position of the license lamp 51. The tail lamp 37, the left and right rear blinkers 50, and the license lamp 51 are configured as a vehicle lighting device having a light emitting diode as a light source in each lamp body 37a, 50a, 51a.
[0021]
Here, on the inner side in the vehicle width direction of each license bracket 40, the outer wall 42, the outer peripheral wall 43, and the like are left, and the lightening is performed. A cover 44 is attached between the outer peripheral walls 43 on the rear side. A resistor circuit 60 for adjusting the voltage applied to the light emitting diode of the rear turn signal 50 on the same side is attached in the space formed by the lightening of each license bracket 40, and the license bracket 40 on the right side is installed in the right side. A resistor circuit 61 for the license lamp 51 is attached.
[0022]
Referring to FIG. 6 as well, a stepped portion 42a is formed on the outer wall 42 of the license bracket 40, and a part of the outer wall 42 changes inward in the vehicle width direction through the stepped portion 42a. Two displacement portions 45 and 46 are provided. The displacement portions 45 and 46 are arranged side by side in the longitudinal direction of the license bracket 40, and a standing wall 47 protruding inward in the vehicle width direction is provided at the bottom of the upper displacement portion 45. A range surrounded by the standing wall 47 is a housing portion 62 of the resistance circuit 60. Further, only the left license bracket 40 is provided with a standing wall 48 protruding inward in the vehicle width direction at the bottom of the lower displacement portion 46, and a range surrounded by the standing wall 48 is a resistance circuit 61 for the license lamp 51. It is set as the accommodating part 63 which accommodates.
[0023]
Here, the resistance circuits 60 and 61 are sufficiently small compared to the license bracket 40. And after accommodating resistance circuit 60,61 in corresponding accommodating part 62,63, each accommodating part 62,63 is sealed with the said mold resin M etc., The license bracket 40, each resistive circuit 60,61, Is configured integrally. In this state, the resistance circuits 60 and 61 are close to the outer wall 42 of the license bracket 40. The harness 64 extending from each resistance circuit 60 is electrically connected to the rear turn signal 50, and the harness 65 extending from the resistance circuit 61 is electrically connected to the license lamp 51. 5 and 6 show the right side license bracket 40 and the resistance circuits 60 and 61, and the left side is a right-and-left object except that the resistance circuit 61 and its housing portion 63 are not provided.
[0024]
According to the above-described embodiment, the left and right rear turn signals 50 and 50 and the license lamp 51 each having a light emitting diode as a light source are supported by the pair of left and right license brackets 40 and 40, and the housing portions 62 and 63 of each license bracket 40 are supported. Since the resistor circuit 60 for the rear turn signal 50 and the resistor circuit 61 for the license lamp 51 are accommodated in the inside, the light emitting diodes of the respective lighting devices and the resistor circuits 60 and 61 are provided in a spatially separated manner. . Thereby, the temperature rise of the light emitting diode due to the heat generation of the resistance circuits 60 and 61 can be suppressed, and the power can be saved and the life can be extended.
[0025]
Further, each license bracket 40, which is an aluminum die-cast product, is significantly reduced in weight by being thinned, and the internal space is effectively used as the accommodating portions 62, 63 of the resistance circuits 60, 61. Here, each of the resistance circuits 60 and 61 is smaller than the license bracket 40 and does not impair the design freedom of the license bracket 40. The license bracket 40 serves as a heat sink, and the heat generated by the resistance circuits 60 and 61 can be radiated well.
Furthermore, since the license bracket 40 and the resistance circuits 60 and 61 are integrally formed, the number of parts and the number of work steps can be reduced, and the cost can be reduced. In addition, since the resistance circuits 60 and 61 are accommodated in the license bracket 40, the appearance is not impaired.
Furthermore, by arranging the parts closely in the lamp body, it is possible to reduce the size of each lamp and increase the degree of freedom in design. Note that the stepped portion 42a of the license bracket 40 and the standing walls 47 and 48 can be fitted to prevent the outer surface of the license bracket 40 from sinking.
[0026]
The present invention is not limited to the above-described embodiments. For example, as shown in FIG. 7, a separate resistor circuit 30 ′ is used instead of the resistor circuit 30, and the lamp bracket 10 to which this can be attached. As', it is good also as composition which attaches these beforehand at another process. The same applies to the resistance circuits 60 and 61 and the license bracket 40. Further, the lamp bracket 10 and the license bracket 40 may be made of a steel plate or a press-formed product instead of an aluminum die cast product.
[0027]
Further, the resistor circuit for the tail lamp 37 can be accommodated in the license bracket 40 in the same manner as the other resistor circuits 60 and 61.
Furthermore, each resistance circuit 30, 60, 61 may be attached to the body frame 2 or the like, for example. Further, as a voltage adjusting means for the light emitting diode, a single resistor or an existing regulator may be used instead of the resistor circuit.
The configuration in each of the above embodiments is merely an example, and can be applied to a three-wheeled or four-wheeled vehicle as well as a motorcycle, and can be appropriately changed without departing from the gist of the present invention. Nor.
[0028]
【The invention's effect】
As described above, according to the present invention, the voltage applied to the light emitting diode is adjusted by the voltage adjusting means separated outside the lamp body, so that the temperature rise of the light emitting diode can be prevented to save power and increase the length. It can be a lifetime.
Further, since the parts are densely arranged in the lamp body, it is possible to reduce the size of the lamp, and the voltage adjusting means is separated from the outside of the lamp body, thereby reducing the weight of the lamp and reducing the weight. it can. Therefore, the design flexibility of the lighting device is increased, and this is particularly suitable when the lighting device is required to be reduced in size and weight, such as a motorcycle or a door mirror with built-in blinker.
[0029]
In addition, according to the present invention, the support member that supports the lamp body and the voltage adjusting means can be integrally configured, and the parts for supporting the voltage adjusting means and the assembling work thereof can be reduced to reduce the cost. be able to. If the support member is made of metal, it can be effectively used as a heat sink for the voltage adjusting means. In particular, if the support member is made of an aluminum material, the weight can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view around a head pipe and a head lamp of a motorcycle according to an embodiment of the present invention.
FIG. 2 is a side view of a lamp bracket.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
Fig. 4 is a perspective view of the vicinity of a rear cowl of a motorcycle.
FIG. 5 is a side view of a license bracket.
6 is a cross-sectional view taken along line BB in FIG.
FIG. 7 is a cross-sectional view corresponding to FIG. 3, showing a modification of the embodiment of the present invention.
[Explanation of symbols]
25 Light emitting diodes 23, 37a, 50a, 51a Lamp body 30, 60, 61 Resistance circuit (voltage adjusting means)
37 Tail lamp
10 Lamp bracket (support member)
50 Riau Inca (lighting equipment)
51 License lamp (lighting equipment)
40 License bracket (support member)

Claims (2)

In the front lighting device of a motorcycle, provided with a lamp bracket for supporting a headlamp at the front of the motorcycle body, and supporting a winker on the outer surface of the lamp bracket,
The lamp bracket is formed by aluminum die casting,
The turn signal is perforated in the lamp body of the light-emitting diode as a light source,
A voltage adjusting means for adjusting a voltage applied to the light emitting diode ;
A motorcycle characterized in that the voltage adjusting means is provided separately from the outside of the lamp body, and the voltage adjusting means is housed and attached in a housing portion provided inside the lamp bracket behind the winker. Front lighting device . The front lighting device for a motorcycle according to claim 1, wherein a housing portion housing the voltage adjusting means is sealed with a mold resin.

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