JP6073842B2 - LED lighting system for motorcycles - Google Patents

Description

  The present invention relates to a motorcycle LED lighting system capable of switching between high-beam lighting or low-beam lighting by an LED light source disposed inside a lamp body.

  For example, Patent Literature 1 discloses an LED lighting system capable of switching between high beam lighting or low beam lighting using an LED light source.

JP 2013-47047 A

  By the way, when applying the LED lighting system of Patent Document 1 to a conventional bulb-type lighting system in a motorcycle and changing the specification to a lighting system using an LED light source, 10 LED light sources are connected in series. Need to connect to.

  In this case, if the forward voltage of each LED light source is, for example, 4V, it is not possible to drive all LED light sources with only a motorcycle battery (12V or 16V battery). That is, it is necessary to boost the voltage of the battery to 40 V (4 V × 10 = 40 V) by a DC-DC converter circuit and apply it to each LED light source connected in series. Further, a switching control circuit for switching to the high beam or the low beam by switching the connection of each LED light source is also required.

  Thus, when the system of patent document 1 is applied, the large-scale design change of the motorcycle including the said system is needed. In addition, the system configuration is more complicated than the conventional bulb-type lighting system, resulting in higher costs. Therefore, improvements for solving these problems are desired.

  Therefore, the present invention is for a motorcycle that can be converted into an LED by changing the light source from a bulb to an LED light source at a low cost with respect to a motorcycle equipped with a conventional bulb-type lighting system. An object is to provide an LED lighting system.

  The motorcycle LED lighting system (10) according to the present invention includes a first LED light source (24), a second LED light source (26, 28), and a power source for supplying current to each of the LED light sources (24 to 28). 52), a lamp body (16) in which the LED light sources (24 to 28) are disposed, and an operation switch (60) for switching between high beam lighting and low beam lighting by the LED light sources (24 to 28). It has the following features.

First feature: The motorcycle LED lighting system (10) includes a first current limiting means (54) for limiting a current flowing through the first LED light source (24), and the second LED light source (26, 28). Second current limiting means (58) for limiting the current flowing through the second LED light source, and disconnection bypass means (66) for detecting disconnection of the second LED light source (26, 28) and bypassing the second LED light source (26, 28). And further comprising. The operation switch (60) is connected to a connection point (56) for connecting the first LED light source (24) and the second LED light source (26, 28). When the high beam is turned on, the first LED light source (24) is connected. The second LED light source (26, 28) and the first current limiting means (54) are energized in series, while the second LED light source (26, 28) and the second current limiting means ( 58) is connected in series , and when the high beam lighting is performed when the second LED light source (26, 28) is bypassed, the first LED light source (24), the first current limiting means (54), the second current limiting means (58) and said disconnection bypass means (66) Ru was serially energized.

  2nd characteristic; Each said current limiting means (54,58) is arrange | positioned inside the said lamp body (16).

Third feature: The operation switch (60) connects the connection point (56) and the disconnection bypass means (66) when the high beam is lit, while the connection point (56) is connected when the low beam is lit. ) And the negative terminal of the power source (52).

Fourth feature: The first LED light source (24) is connected between the connection point (56) and a negative terminal of the power source (52). The operation switch (60) bypasses the first LED light source (24) and energizes the second LED light source (26, 28) and the second current limiting means (58) in series during the low beam lighting.

Fifth feature: the second current limiting means (58) is provided between the connection point (56) and the operation switch (60).

Sixth feature; the second current limiting means (58) has a higher current suppressing force than the first current limiting means (54).

According to the first aspect of the present invention, the first LED light source and the second LED light source are driven using the power source, the first current limiting unit, and the second current limiting unit, and the high beam or the low beam is switched only by operating the operation switch. Do. Since the old bulb-type lighting system is also equipped with a power supply and operation switch, it is possible to change the light source from a bulb to an LED light source and make it an LED with a slight design change and low cost with respect to the lighting system. Can do. In addition, even if the second LED light source is disconnected, the disconnection bypass means detects the disconnection of the second LED light source, so that when the high beam is turned on, the first LED light source can be reliably turned on by switching the operation switch. Furthermore, by bypassing the disconnected second LED light source by the disconnection bypass means, a power source is connected to the first LED light source without passing through the second LED light source. As a result, the first LED light source, the first current limiting unit, and the second current limiting unit are energized in series, and an overcurrent can be suppressed from flowing to the first LED light source.

  According to the second feature of the present invention, the first current limiting means and the second current limiting means are arranged inside the lamp body, thereby making the design change easy and reducing the cost for the design change.

According to the third feature of the present invention, the operation switch can be switched appropriately to the high beam or the low beam to be lit.

According to the fourth feature of the present invention, even if the first LED light source is disconnected, the second LED light source can be turned on as a low beam by switching the operation switch.

According to the fifth feature of the present invention, the current supplied to the second LED light source can be suppressed by the second current limiting means by switching the operation switch.

According to the sixth aspect of the present invention, it is possible to appropriately supply current to each LED light source during high beam lighting and low beam lighting.

1 is a partial front view of a motorcycle equipped with a headlight constituting a system according to an embodiment. It is a circuit diagram of the system concerning this embodiment. FIG. 3A is a circuit diagram of the system in the first embodiment, and FIG. 3B is a circuit diagram of the system in the second embodiment. FIG. 4A is a circuit diagram of the system in the third embodiment, and FIG. 4B is a circuit diagram of the system in the fourth embodiment. FIG. 5A is a circuit diagram of the system in the fifth embodiment, and FIG. 5B is a circuit diagram of the system in the sixth embodiment. It is a circuit diagram of the conventional system using a valve.

  A motorcycle LED lighting system according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[System configuration according to this embodiment]
FIG. 1 is a partial front view of a motorcycle 12 to which a motorcycle LED lighting system 10 according to the present embodiment (hereinafter also referred to as the system 10 according to the present embodiment) is applied. FIG. FIG. 10 is a circuit diagram of FIG. In FIG. 1, the front-rear, left-right, and up-down directions of the motorcycle 12 will be described with reference to directions seen from a passenger seated on a seat (not shown) of the motorcycle 12.

  In the motorcycle 12, a headlight 16 as a lamp that irradiates the front is attached to a head pipe 14 constituting a body frame via a stay (not shown).

  The headlight 16 includes a housing 18 and a lens 20 that constitute a housing of the headlight 16. A substrate 22 is disposed at a substantially central portion in the space formed by the housing 18 and the lens 20. One first LED light source 24 is disposed on the upper surface of the substrate 22, while two second LED light sources 26 and 28 are disposed on the bottom surface of the substrate 22. In addition, a reflector 30 is disposed behind the substrate 22 in the space, and a shielding portion 32 that covers the substrate 22 is disposed in front of the substrate 22.

  In the space, the light emitted from one first LED light source 24 is reflected forward above the reflector 30, and the light emitted from the two second LED light sources 26, 28 is below the reflector 30. Reflected forward. The reflected light is irradiated to the front of the motorcycle 12 through the lens 20. Therefore, the headlight 16 can perform high beam lighting or low beam lighting by light emission of the first LED light source 24 and / or the second LED light sources 26 and 28.

  A substantially annular cover member 34 is provided between the inner periphery of the housing 18 and the outer periphery of the reflector 30, and a light guide 36 that transmits light from an auxiliary light source (not shown) forward is provided in the cover member 34. It is attached at predetermined angular intervals.

  A pair of left and right front forks 38 are rotatably supported by the head pipe 14 in front of the motorcycle 12, and a steering bridge is connected to the upper ends of the pair of left and right front forks 38 via a top bridge 40. A handle 42 is attached. The top bridge 40 is attached with a meter portion 44 having a speedometer and the like. Further, the top bridge 40 and the bottom bridge 46 are connected by a pipe (not shown), and a pair of left and right front blinkers 48 are attached to the pipe. A front wheel (not shown) is rotatably supported by a pair of left and right front forks 38, and a front fender 49 is provided above the front wheel. A pair of left and right horns 50 that output a warning sound are attached to the bottom bridge 46.

  As shown in FIG. 2, the system 10 according to this embodiment includes a power source 52 that is a battery of the motorcycle 12. A series circuit of one first LED light source 24, two second LED light sources 26 and 28, first current limiting means 54 and a transistor 55 is connected in parallel to the power source 52. In this case, the second LED light source 26 is connected to the positive terminal side of the power source 52, and the first LED light source 24 is connected to the negative terminal side via the transistor 55 and the first current limiting means 54. Further, in each of the first LED light source 24 and the second LED light sources 26 and 28, the positive terminal side of the power source 52 is an anode, and the negative terminal side is a cathode.

  A common contact 61 of the operation switch 60 is connected to a connection point 56 between the first LED light source 24 and the second LED light source 28 via a second current limiting means 58. The operation switch 60 is a three-point switch that can switch the connection to the first contact 62 or the second contact 64 with respect to the common contact 61, and is provided separately from the headlight 16. For example, it is configured as a part of a handle switch (not shown) provided in the vicinity of the meter portion 44 of the handle 42 and is operated by a passenger.

  The first current limiting means 54 and the second current limiting means 58 are both current limiting resistors, and the resistance value of the first current limiting means 54 is higher than the resistance value of the second current limiting means 58. It is set low. Therefore, the second current limiting means 58 has a larger current suppression effect than the first current limiting means 54.

  When the disconnection of the second LED light sources 26 and 28 is detected when the common contact 61 and the first contact 62 are connected between the second LED light source 26 and the first contact 62, the second LED light sources 26 and 28 are detected. A disconnection bypass means 66 for bypassing is connected. The second contact 64 is connected to the negative terminal of the power source 52.

  Further, a series circuit of two resistors 68 and 70 is connected between the common contact 61 and the negative terminal of the power supply 52, and the middle point of each resistor 68 and 70 is connected to the base terminal of the transistor 55. Has been. The resistance values of the resistors 68 and 70 are desirably sufficiently larger than the resistance values of the first current limiting means 54 and the second current limiting means 58, for example, 10 times or more.

[Operation of system according to this embodiment]
The system 10 according to the present embodiment is configured as described above. Next, the operation of the system 10 will be described.

  Here, when the headlight 16 performs high beam lighting or low beam lighting using the first LED light source 24 and the second LED light sources 26 and 28, the system 10 as a whole operates normally (first embodiment of FIG. 3A, 3B), the case where the first LED light source 24 is disconnected (the third embodiment of FIG. 4A, the fourth embodiment of FIG. 4B), the case where the second LED light sources 26, 28 are disconnected ( The description will be divided into the fifth embodiment of FIG. 5A and the sixth embodiment of FIG. 5B. In these operations, the description will be given with reference to FIGS. 1 and 2 as necessary.

  In the first to sixth embodiments, as an example, the voltage of the power source 52 is 16V, the forward voltage of the first LED light source 24 and the second LED light sources 26 and 28 is 4V, and the resistance value of the first current limiting means 54 is 50Ω. The description will be made assuming that the resistance value of the second current limiting means 58 is 100Ω.

[First embodiment]
The first embodiment of FIG. 3A illustrates high beam lighting of the headlight 16 when the system 10 is normal.

  That is, when an occupant of the motorcycle 12 operates the operation switch 60 and the inside of the operation switch 60 is switched to the connection between the common contact 61 and the first contact 62, the second LED light sources 26 and 28 and the second current limiter from the power source 52 are switched. A voltage is applied to the two resistors 68 and 70 via the means 58. The two resistors 68 and 70 divide the voltage between the common contact 61 and the negative terminal of the power source 52 (the potential of the common contact 61), and the transistor 55 has a base current due to the divided voltage. By flowing into the base terminal, the collector terminal and the emitter terminal are switched from OFF to ON. When the transistor 55 is turned on, the second LED light sources 26 and 28, the first LED light source 24, and the first current limiting means 54 are energized in series with respect to the power source 52 as shown by the loop-shaped arrow in FIG. Current flows through The series energization means that the voltage of the power supply 52 is applied and a current flows through the series connection circuit by being connected in series to the power supply 52 (series connection circuit).

  As a result, the first LED light source 24 and the second LED light sources 26 and 28 emit light, and the light from the first LED light source 24 and the second LED light sources 26 and 28 is reflected forward by the reflector 30 in FIG. As a result, the headlight 16 can irradiate the front of the motorcycle 12 with a high beam of light via the lens 20.

  Since the first LED light source 24 and the second LED light sources 26 and 28 emit light with a forward voltage of 4 V, a voltage of 4 V is applied to the first current limiting means 54. Therefore, a current of 80 mA (4 V / 50Ω = 80 mA) flows through the loop-shaped arrow portion of FIG. 3A.

  Further, in the first embodiment, the common contact 61 and the first contact 62 of the operation switch 60 are connected, so that the disconnection bypass means 66, the operation switch 60, and the two second LED light sources 26 and 28 are connected. The second current limiting means 58 is connected in parallel. However, in the first embodiment, since the disconnection of the second LED light sources 26 and 28 does not occur, the disconnection bypass means 66 does not bypass the second LED light sources 26 and 28.

[Second Embodiment]
The second embodiment of FIG. 3B illustrates the low beam lighting of the headlight 16 when the system 10 is normal.

  That is, when the occupant operates the operation switch 60 and the inside of the operation switch 60 is switched to the connection between the common contact 61 and the second contact 64, the common contact 61 and the negative terminal of the power source 52 become the same potential and the two resistances Devices 68 and 70 are shorted. As a result, a base current does not flow to the base terminal of the transistor 55, and the transistor 55 maintains an off state. As a result, as indicated by the looped arrow in FIG. 3B, the second LED light sources 26 and 28, the second current limiting means 58 and the operation switch 60 are energized in series to the power supply 52, and current flows in the direction of the arrow. . Accordingly, the first LED light source 24, the first current limiting means 54, the transistor 55, and the two resistors 68 and 70 are bypassed by the second current limiting means 58 and the operation switch 60.

  As a result, when the second LED light sources 26 and 28 emit light, the light from the second LED light sources 26 and 28 is reflected forward by the reflector 30 in FIG. 1, and the headlight 16 passes through the lens 20 and has a low beam. Light can be emitted in front of the motorcycle 12.

  In the second embodiment, the second LED light sources 26 and 28 emit light at a forward voltage of 4 V, so that a voltage of 8 V is applied to the second current limiting means 58. Therefore, a current of 80 mA (8 V / 100Ω = 80 mA) flows through the loop-shaped arrow portion of FIG. 3B, as in the first embodiment. In addition, since the common contact 61 and the second contact 64 are connected, no current flows through the disconnection bypass means 66.

[Third embodiment]
4A, when the first LED light source 24 is disconnected, for example, when the wiring between the connection point 56 and the first LED light source 24 is disconnected, the headlight 16 is turned on with a high beam. The case where it is going to be illustrated is illustrated. In addition, in FIG. 4A, the disconnection location is shown by X mark.

  In this case, even if the occupant of the motorcycle 12 operates the operation switch 60 and the operation switch 60 is switched to the connection between the common contact 61 and the first contact 62, the second LED light sources 26 and 28 and the second current from the power source 52 are switched. A voltage is applied to the resistors 68 and 70 via the limiting means 58. Each of the resistors 68 and 70 divides the voltage between the common contact 61 and the negative terminal of the power source 52, and a base current caused by the divided voltage flows into the base terminal of the transistor 55. As a result, the transistor 55 is switched from off to on.

  However, in the third embodiment, since the connection point 56 and the first LED light source 24 are disconnected, the first LED light source even when the transistor 55 is turned on as shown by the broken arrow in FIG. 4A. No current flows through 24 and the second LED light sources 26 and 28. Thus, the first LED light source 24 and the second LED light sources 26 and 28 do not emit light, and the headlight 16 cannot irradiate light in front of the motorcycle 12. Accordingly, the occupant can recognize that a disconnection or the like has occurred in the headlight 16.

[Fourth embodiment]
The fourth embodiment of FIG. 4B illustrates a case where the headlight 16 is to be turned on by a low beam when the first LED light source 24 is disconnected.

  In this case, when an occupant of the motorcycle 12 operates the operation switch 60 and the inside of the operation switch 60 is switched to the connection between the common contact 61 and the second contact 64, the power source 52 is shown as indicated by a loop-shaped arrow in FIG. 4B. On the other hand, the second LED light sources 26 and 28, the second current limiting means 58 and the operation switch 60 are energized in series, and a current flows in the direction of the arrow. In addition, since the common contact 61 and the negative terminal of the power supply 52 become the same potential by switching to the connection between the common contact 61 and the second contact 64, the resistors 68 and 70 are short-circuited. As a result, a base current does not flow to the base terminal of the transistor 55, and the transistor 55 maintains an off state.

  Thus, if the second LED light sources 26 and 28 emit light, the light from the second LED light sources 26 and 28 is reflected forward by the reflector 30 in FIG. 1, and the headlight 16 passes through the lens 20 and emits low-beam light. Can be irradiated in front of the motorcycle 12.

  That is, in the fourth embodiment, even when the first LED light source 24 is disconnected, the first LED light source 24, the first current limiting unit 54, the transistor 55, and the resistors are operated by the second current limiting unit 58 and the operation switch 60. By bypassing 68 and 70, the headlight 16 can be reliably turned on in a low beam.

  In the fourth embodiment, the second LED light sources 26 and 28 emit light with a forward voltage of 4 V, respectively, so that a voltage of 8 V is applied to the second current limiting means 58, and the loop-shaped arrow in FIG. As in the case of the second embodiment, a current of 80 mA (8 V / 100Ω = 80 mA) flows through the portion. That is, in the fourth embodiment, a current having the same magnitude as that in the normal state of the second embodiment can be caused to flow to the second LED light sources 26 and 28, so that the occurrence of overcurrent due to the disconnection of the first LED light source 24 is suppressed. can do.

[Fifth embodiment]
In the fifth embodiment of FIG. 5A, when the second LED light sources 26 and 28 are disconnected, for example, when the wiring in the vicinity of the second LED light source 26 is disconnected, the headlight 16 is turned on with a high beam. Is illustrated. Note that, in FIG. 5A, the disconnection portion is indicated by an X mark.

  In this case, when the occupant of the motorcycle 12 operates the operation switch 60 and the inside of the operation switch 60 is switched to the connection between the common contact 61 and the first contact 62, the second LED light sources 26 and 28 are disconnected. A voltage is applied from 52 to the resistors 68 and 70 via the disconnection bypass means 66 and the operation switch 60. Each of the resistors 68 and 70 divides the voltage between the common contact 61 and the negative terminal of the power source 52, and the transistor 55 is turned off when a base current caused by the divided voltage flows into the base terminal. Switch on. When the transistor 55 is turned on, the disconnection bypass unit 66, the operation switch 60, the second current limiting unit 58, the first LED light source 24, and the first current limiting unit 54 are connected to the power source 52 in series.

  As a result, as shown by the loop-shaped arrow in FIG. 5A, the current is passed in series in the direction of the disconnection bypass means 66, the operation switch 60, the second current limiting means 58, the first LED light source 24, and the first current limiting means 54. As a result, the disconnection bypass means 66 functions to detect and bypass the disconnection of the second LED light sources 26 and 28.

  Thereby, the 1st LED light source 24 light-emits, and the light from the 1st LED light source 24 is reflected ahead by the reflector 30 of FIG. Therefore, the headlight 16 can irradiate the front of the motorcycle 12 with a high beam of light via the lens 20.

  However, in the fifth embodiment, since the high beam is lit only with the first LED light source 24, the luminance of the high beam is lower than the luminance in the first embodiment in which the first LED light source 24 and the second LED light sources 26 and 28 emit light. Therefore, the occupant can recognize that a disconnection or the like has occurred in the headlight 16 because the high beam light has a low luminance.

  Since the first LED light source 24 emits light with a forward voltage of 4 V, a voltage of 12 V in total is applied to the first current limiting means 54 and the second current limiting means 58. Accordingly, a current of 80 mA (12 V / (50Ω + 100Ω) = 80 mA) flows through the loop-shaped arrow portion of FIG. 5A, as in the first embodiment. That is, in the fifth embodiment, a current having the same magnitude as that in the normal state of the first embodiment can be supplied to the first LED light source 24, so that the occurrence of overcurrent due to the disconnection of the second LED light sources 26 and 28 is suppressed. can do.

[Sixth embodiment]
The sixth embodiment of FIG. 5B illustrates a case where the headlight 16 is intended to be lit in a low beam when the second LED light sources 26 and 28 are disconnected.

  In this case, even if the occupant of the motorcycle 12 operates the operation switch 60 and the inside of the operation switch 60 is switched to the connection between the common contact 61 and the second contact 64, the second LED light sources 26 and 28 are disconnected, and the connection is disconnected. Since the bypass means 66 is not connected to the second current limiting means 58, no current flows, as illustrated by the dashed arrows in FIG. 5B. Accordingly, the first LED light source 24 does not emit light, and the headlight 16 cannot irradiate light in front of the motorcycle 12. As a result, the occupant can recognize the occurrence of disconnection in the headlight 16.

[Effect of this embodiment]
As described above, according to the system 10 according to the present embodiment, the first LED is configured using the power source 52, the first current limiting unit 54, the second current limiting unit 58, the transistor 55, and the two resistors 68 and 70. The light source 24 and the second LED light sources 26 and 28 are driven, and the high beam or the low beam is switched only by operating the operation switch 60 by the occupant of the motorcycle 12.

  As shown in FIG. 6, the conventional bulb type system 78 is also provided with a power source 52 and an operation switch 60. Therefore, the light source can be changed from the bulbs 80 and 82 with a slight design change and low cost. The system 10 in FIG. 1 can be configured by changing to the first LED light source 24 and the second LED light sources 26 and 28 to form LEDs.

  That is, in the conventional system 78 of FIG. 6, the valves 80 and 82 are arranged in the headlight 16, the positive terminal of the power source 52 is connected to the common contact 61 of the operation switch 60, and the valve 80 is connected to the first contact 62. The valve 82 is connected to the second contact 64. Accordingly, the valves 80 and 82 are connected in parallel to the power supply 52 via the operation switch 60.

  Therefore, in the present embodiment, the bulbs 80 and 82 in the headlight 16 are connected to the first LED light source 24, the second LED light sources 26 and 28, the first current limiting unit 54, the second current limiting unit 58, the disconnection bypass unit 66, and the transistor. The system 10 can be easily configured by replacing the power supply 52, the operation switch 60, and the headlight 16 by replacing the resistor 55 and the two resistors 68 and 70 with each other.

  In recent years, since the performance of the LED light source has been improved, a total of three LED light sources including one first LED light source 24 and two second LED light sources 26 and 28 are arranged in the housing 18. Thus, a high beam or low beam headlight 16 with sufficient luminance can be realized. Therefore, in this embodiment, it is not necessary to connect ten LED light sources in series as in Patent Document 1, and a complicated control circuit such as a DC-DC converter or a switching control circuit is not necessary. Simplification can be achieved.

  In addition, in the present embodiment, the one first LED light source 24 and / or the two second LED light sources 26 and 28 can be energized in series by operating the operation switch 60 during high beam lighting or low beam lighting. Thereby, if the brightness of the high beam or the low beam decreases due to the occurrence of disconnection of the first LED light source 24 or the second LED light sources 26, 28, the occupant generates the disconnection of the first LED light source 24 or the second LED light sources 26, 28. It can be easily recognized, and measures such as replacement of the LED light source can be taken.

  That is, in this embodiment, by conducting the series energization, it becomes easier for the occupant to notice the occurrence of the disconnection of the first LED light source 24 or the second LED light sources 26 and 28 as compared with the case of energizing in parallel.

  Further, in the present embodiment, the first current limiting unit 54 and the second current limiting unit 58 are arranged inside the headlight 16, whereby the design change can be facilitated and the cost for the design change can be reduced. That is, if the first current limiting means 54 and the second current limiting means 58 are arranged outside the headlight 16, a base or stay for fixing the first current limiting means 54 and the second current limiting means 58 is required. . In particular, in the case of the motorcycle 12, the installation space of the first current limiting unit 54 and the second current limiting unit 58 outside the headlight 16 is greatly limited.

  Therefore, in the present embodiment, by arranging the first current limiting unit 54 and the second current limiting unit 58 inside the headlight 16, it is possible to avoid the occurrence of the above problem.

  Moreover, in the present embodiment, as described above, the headlight 16 in which the bulbs 80 and 82 are arranged is replaced with the first LED light source 24, the second LED light sources 26 and 28, the first current limiting unit 54, the second current limiting unit 58, The system 10 can be configured by replacing the headlight 16 with the transistor 55 and the two resistors 68 and 70 and changing the connection between the power source 52 and the operation switch 60. In this way, in the design stage of the motorcycle 12, the system 10 can be configured simply by replacing the headlight 16 with the power supply 52 and the operation switch 60 intact, so that a small design change and the minimum necessary replacement cost are possible. Thus, the headlight 16 can be converted to an LED.

  Further, if the first current limiting means 54 and the second current limiting means 58 are arranged inside the headlight 16, the specification value of the headlight 16 is set to a constant value by adjusting the components in the headlight 16. Can be shared. Further, even if the characteristics of the first LED light source 24 and the second LED light sources 26 and 28 are varied, the heads having a desired specification value can be obtained by adjusting the resistance values of the first current limiting means 54 and the second current limiting means 58. The light 16 can be realized.

  In the present embodiment, even if the second LED light sources 26 and 28 are disconnected, the disconnection bypass means 66 detects the disconnection of the second LED light sources 26 and 28, so that when the high beam is lit, the first LED is switched by switching the operation switch 60. The light source 24 can be reliably turned on. Further, the disconnected second LED light sources 26, 28 are bypassed by the disconnection bypass means 66, whereby the power source 52 is connected to the first LED light source 24 without passing through the second LED light sources 26, 28. As a result, the first LED light source 24, the first current limiting unit 54, and the second current limiting unit 58 are energized in series, and an overcurrent can be suppressed from flowing through the first LED light source 24.

  Further, the operation switch 60 connects the connection point 56 and the second current limiting unit 58 and the disconnection bypass unit 66 when the high beam is lit, while the connection point 56 and the second current limiting unit 58 and the power source are connected when the low beam is lit. 52 is connected to the negative terminal. Thereby, if a passenger | crew switches the operation switch 60, the headlight 16 can be switched to a high beam or a low beam appropriately, and can be lighted.

  Furthermore, in the present embodiment, the first LED light source 24 is connected between the connection point 56 and the negative terminal of the power source 52, and the operation switch 60 bypasses the first LED light source 24 when the low beam is lit, and the second LED light source 26, 28 and the second current limiting means 58 are energized in series. Thereby, even if the 1st LED light source 24 is disconnected, if the operation switch 60 is switched, the 2nd LED light sources 26 and 28 can be lighted as a low beam.

  In addition, since the second current limiting means 58 is provided between the connection point 56 and the operation switch 60, the current supplied to the second LED light sources 26, 28 is changed by the second current limiting means 58 when the operation switch 60 is switched. Can be suppressed.

  Further, since the second current limiting means 58 has a higher current suppressing power than the first current limiting means 54, it is appropriate for the first LED light source 24 and the second LED light sources 26 and 28 at the time of high beam lighting and low beam lighting. A current can be passed through.

  Furthermore, in the present embodiment, the transistor 55 and the two resistors 68 and 70 are provided, and the voltage between the common contact 61 and the negative terminal of the power source 52 (the potential of the common contact 61) is set to each of the resistors 68 and 70. The base current resulting from the divided voltage is caused to flow to the base terminal of the transistor 55, whereby the collector terminal and the emitter terminal of the transistor 55 are switched on or off. As a result, at the time of high beam lighting, the first LED light source 24 and the second LED light sources 26 and 28 can be reliably turned on. On the other hand, when the low beam is lit, the common contact 61 is connected to the negative terminal of the power supply 52, and the resistors 68 and 70 are short-circuited. Therefore, the transistor 55 is maintained in an OFF state, and current does not flow through the first LED light source 24. Absent. Thereby, low beam lighting and high beam lighting can be switched reliably.

  In the above description, the case where the first current limiting unit 54 is provided on the cathode side of the first LED light source 24 and the second current limiting unit 58 is provided between the connection point 56 and the operation switch 60 has been described. The present embodiment is not limited to the above description, and the first current limiting means 54 is provided on the anode side of the second LED light source 26, and the second contact 64 of the operation switch 60 and the negative terminal of the power source 52 are connected. A second current limiting means 58 may be provided between them. Even in this case, the above-described effects can be easily obtained.

  As mentioned above, although this invention was demonstrated using suitable embodiment, the technical scope of this invention is not limited to the description range of said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. It is apparent from the description of the scope of claims that the embodiments added with such changes or improvements can also be included in the technical scope of the present invention. In addition, the reference numerals in parentheses described in the claims are appended to the reference numerals in the accompanying drawings for easy understanding of the present invention. It should not be construed as limited.

10 ... System (motorcycle LED lighting system)
12 ... Motorcycle 16 ... Headlight
DESCRIPTION OF SYMBOLS 24 ... 1st LED light source 26, 28 ... 2nd LED light source 52 ... Power supply 54 ... 1st current limiting means 55 ... Transistor 56 ... Connection point 58 ... 2nd current limiting means 60 ... Operation switch 61 ... Common contact 62 ... 1st contact 64 ... second contact 66 ... disconnection bypass means 68, 70 ... resistor

Claims (6)

A first LED light source (24);
A second LED light source (26, 28);
A power supply (52) for supplying current to each of the LED light sources (24-28);
A lamp body (16) in which the LED light sources (24 to 28) are disposed;
An operation switch (60) for switching between high beam lighting and low beam lighting by the LED light sources (24 to 28);
In a motorcycle LED lighting system (10) comprising:
A first current limiting means for limiting a current flowing through the first 1LED light source (24) (54), a second current limiting means for limiting a current flowing through the first 2LED light source (26, 28) and (58), said first A disconnection bypass means (66) for detecting disconnection of the two LED light sources (26, 28) and bypassing the second LED light source (26, 28) ;
The operation switch (60)
Connected to a connection point (56) connecting the first LED light source (24) and the second LED light source (26, 28);
During the high beam lighting, the first LED light source (24), the second LED light source (26, 28) and the first current limiting means (54) are energized in series,
On the other hand, during the low beam lighting, the second LED light source (26, 28) and the second current limiting means (58) are energized in series,
Further, when the high beam lighting is performed when the second LED light source (26, 28) is bypassed, the first LED light source (24), the first current limiting means (54), the second current limiting means (58), and the LED lighting apparatus system for a motorcycle, wherein Rukoto disconnection bypass means (66) is serially energized (10). In the LED lighting system (10) for motorcycles according to claim 1,
The LED lighting system (10) for a motorcycle, wherein each of the current limiting means (54, 58) is disposed inside the lamp (16). In the motorcycle LED lighting system (10) according to claim 1 or 2 ,
The operation switch (60) connects the connection point (56) to the disconnection bypass means (66) during the high beam lighting, while the connection point (56) and the power source (66) during the low beam lighting. 52) The LED lighting system (10) for a motorcycle, characterized by being connected to the minus terminal of 52). In the LED lighting system (10) for motorcycles according to any one of claims 1 to 3 ,
The first LED light source (24) is connected between the connection point (56) and a negative terminal of the power source (52),
The operation switch (60) bypasses the first LED light source (24) and causes the second LED light source (26, 28) and the second current limiting means (58) to be energized in series during the low beam lighting. The LED lighting system for motorcycles (10). In the LED lighting system (10) for motorcycles according to any one of claims 1 to 4 ,
The motorcycle LED lighting system (10), wherein the second current limiting means (58) is provided between the connection point (56) and the operation switch (60). In the LED lighting system (10) for motorcycles according to any one of claims 1 to 5 ,
The LED lighting system (10) for motorcycles, wherein the second current limiting means (58) has a higher current suppressing power than the first current limiting means (54).

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