JP2005289270A - Optical axis control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical axis adjustment system capable of simultaneously adjusting optical axes of two different lamps by using one optical axis adjustment switch.
An optical axis control system (20) includes a first lamp (21) that adjusts an optical axis by swinging a first reflector that is installed so as to be swingable by a first drive means, and a second lighter that is smaller than the first reflector. The second lamp 22 for adjusting the optical axis by swinging the reflector by the second driving means, the power supply means 60 for applying a driving voltage to the first driving means and the second driving means, and the power supply means 60 The first reflector and the second reflector according to the swing operation of the swing operation means 25, and the swing operation means 25 that swings the first reflector and the second reflector simultaneously in the same direction by changing the voltage value Voltage adjusting means 23 and 24 for adjusting the voltage value of the driving voltage applied to at least one of the first driving means or the second driving means so that the optical axis of the first and second driving means swings by the same angle.
[Selection] Figure 1

Description

  The present invention provides a first lamp for adjusting an optical axis by swinging a first reflector installed so as to be swingable by a first drive means, and a second reflector smaller than the first reflector by a second drive means. The present invention relates to an optical axis control system capable of simultaneously swinging a second lamp for swinging and performing optical axis adjustment.

  Conventionally, there has been known an optical axis adjustment system that adjusts an optical axis of a head ride that is turned upward due to the rear part of the vehicle sinking due to a load loaded in a luggage compartment (see, for example, Patent Document 1 and Patent Document 2). .)

  On the other hand, in addition to the headlight, there are many vehicles on which assistance such as a fog lamp is installed, and it is desired to adjust the optical axis in the same manner as the headlight in such assistance.

  FIG. 6 shows a configuration in which an auxiliary light is added to an optical axis adjustment system conventionally used.

  The headlight 1 capable of adjusting the optical axis has a structure capable of swinging the reflector 2 up and down. As shown in FIG. 7A, the headlight 1 has a fixed distance from the swing fulcrum portion 3 of the reflector 2. A rod 4 connected to the end of the reflector separated by L1 and a rod drive unit 5 that swings the reflector 2 by moving the rod 4 forward and backward are provided.

  Further, the auxiliary lamp 7 capable of adjusting the optical axis has the same structure, and is connected to the reflector end portion separated from the swing fulcrum portion 9 of the reflector 8 by a certain distance L2, as shown in FIG. And a rod drive unit 11 that swings the reflector 8 by moving the rod 10 forward and backward. Note that the reflector 8 of the general auxiliary lamp 7 is smaller than the reflector 2 of the headlight 1 because the irradiation range of the auxiliary lamp is narrower than that of the headlight.

  The optical axis control system 14 also includes a voltage divider (voltage adjusting means) that reduces the driving voltage applied to the rod driving units 5 and 11 from the vehicle power source (DC voltage 12V) 15 to a voltage value suitable for the headlight 1. ) And the voltage value to be applied to the rod drive units 5 and 11 by adjusting the voltage value of the voltage divider 16, and the amount of movement of the rods 4 and 10 in the rod drive units 5 and 11 is controlled. An adjustment switch 17 is provided.

  The drive voltage adjusted by the adjustment switch 17 is supplied to the headlamp 1 and the auxiliary lamp 7 installed on the left and right, respectively.

The optical axis adjustment in the headlamp 1 and the auxiliary lamp 7 is performed by adjusting the reflectors 2 and 8 by adjusting the voltage in the voltage divider 16 and changing the forward and backward movements of the rods 4 and 10 by the rod driving units 5 and 11. Is called.
JP 2000-355245 A (FIG. 2) JP 2001-222908 A (FIG. 5)

  However, since the reflector 2 used for the headlight 1 and the reflector 8 used for the auxiliary light 7 are different in size, the amount of advance / retreat between the rod 4 of the rod drive unit 5 and the rod 10 of the rod drive unit 11 is different. When a is the same (when the relationship between the voltage value applied to the drive units 5 and 11 and the amount of advance and retreat of the rods 4 and 10 driven according to the voltage value is the same), FIG. As shown in (d), there is a problem that the movement angle θ2 of the optical axis of the auxiliary lamp 7 becomes larger than the movement angle θ1 of the optical axis of the headlamp 1, resulting in a difference in the adjustment angle of the optical axis. .

  In addition to the voltage divider 16 and adjustment switch 17 used for adjusting the optical axis of the headlight 1, a voltage divider and adjustment switch used for adjusting the optical axis of the auxiliary lamp 7 are prepared, and the auxiliary lamp 7 is independently provided. It is possible to adjust the optical axis of the auxiliary lamp so that the inclination angle of the auxiliary lamp 7 does not become larger than the inclination angle of the headlamp 1, but the auxiliary light 7 and the auxiliary light 7 can be adjusted. It is troublesome to adjust the optical axis by operating the two adjustment switches with the lamp 7, and it is not easy to adjust the two optical axes to the same angle by operating different adjustment switches. was there.

  There is also a method of adjusting the amount of advance and retreat of the rod 4 and the rod 10 that are driven with respect to the applied voltage value for each of the rod drive unit 5 and the rod drive unit 11 according to the distances L1 and L2 from the support point to the rod. Although it can be considered, there are innumerable combinations of distances L1 and L2 from the support point to the rod in the headlight 1 and the auxiliary lamp 7, and designing the rod driving units 5 and 11 according to each combination is a productivity, There is a problem that it cannot be easily adopted from the viewpoint of cost and the like.

  The present invention has been made in view of the above problems, and it is an object to provide an optical axis adjustment system capable of simultaneously adjusting the optical axes of two different lamps using one optical axis adjustment switch. To do.

  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a first lamp that adjusts an optical axis by swinging a first reflector that is installed so as to be swingable by a first driving means, and the first reflector. A second lamp for adjusting the optical axis by swinging a smaller second reflector by the second driving means, a power supply means for applying a driving voltage to the first driving means and the second driving means, A swing operation means for changing the voltage value output from the power supply means to swing the first reflector and the second reflector simultaneously in the same direction, and according to the swing operation of the swing operation means, Voltage adjustment for adjusting the voltage value of the drive voltage applied to at least one of the first drive means or the second drive means so that the optical axes of the first reflector and the second reflector are swung by the same angle. Optical axis control of a vehicular lamp provided with means Characterized in that it is a system.

  The invention according to claim 2 is the optical axis control system according to claim 1, wherein the voltage adjusting means adjusts a voltage value of a driving voltage applied to the first driving means, and And a second voltage adjusting means for adjusting a voltage value of a driving voltage applied to the second driving means, wherein the swing operation means controls the first voltage adjusting means to control the first driving means from the power supply means. The second voltage adjusting means adjusts the driving voltage adjusted by the first voltage adjusting means to a voltage value suitable for the optical axis adjustment amount of the second reflector. By adjusting, the first driving means and the second driving means are driven such that the optical axes of the first reflector and the second reflector are swung by the same angle.

  According to a third aspect of the present invention, in the optical axis control system according to the first aspect, the voltage adjusting unit includes a first voltage adjusting unit that adjusts a voltage value of a driving voltage applied to the first driving unit, and Second voltage adjusting means for adjusting a voltage value of a driving voltage applied to the second driving means, and the first voltage adjusting means and the second voltage adjusting means are used for swinging the swing operating means. In response, the first reflector and the second reflector are independently adjusted by adjusting the voltage value of the drive voltage applied to the first drive means and the voltage value of the drive voltage applied to the second drive means. The first driving means and the second driving means are driven so that the optical axes of the first and second optical axes swing by the same angle.

  5. The optical axis control system according to claim 2, wherein the first driving means is engaged with an end portion of the first reflector that is swingably installed at a first support point. And a first rod that moves forward and backward in accordance with the voltage value of the drive voltage adjusted by the first voltage adjusting means to swing the first reflector, and the second drive means has a second support point. Is engaged with the end of the second reflector that is swingably installed, and moves forward and backward according to the voltage value of the drive voltage procured by the second voltage adjusting means to swing the second reflector. The second voltage adjusting means has a second rod, wherein the distance from the first support point to the first rod is L1, and the distance from the second support point to the second rod is L2. The voltage value of the drive voltage adjusted by the first voltage adjusting hand is And the first voltage adjusting means so that the voltage value of the compared voltage values of the adjusted drive voltage L2 / L1 and the second voltage adjusting means and performing the voltage adjusted by.

  According to the first aspect of the present invention, the voltage adjusting means causes the first reflector and the second reflector to swing by the same angle in accordance with the swing operation of the swing operation means. Since the voltage value of the driving voltage applied to at least one of the first driving means or the second driving means is adjusted, two lamps having different reflector sizes can be simultaneously operated in the same direction (at the same angle) by operating the swing operation means. ) To adjust the optical axis.

  In particular, according to the second aspect of the present invention, the swing voltage controlling means controls the first voltage adjusting means to adjust the voltage value of the driving voltage applied to the first driving means from the power supply means, and the second voltage The adjusting means adjusts the drive voltage adjusted in the first voltage adjusting means to a voltage value suitable for the optical axis adjustment amount of the second reflector, so that the optical axes of the first reflector and the second reflector are the same. Since the angle is swung only by the angle, the voltage value of the drive voltage applied to the second drive means by the second voltage adjusting means can be adjusted only by adjusting the voltage value of the drive voltage applied to the first drive means by the swing operation means. The optical axes of the two lamps can be adjusted simultaneously by operating the swing operation means.

  According to the third aspect of the present invention, the driving voltage that the first voltage adjusting unit and the second voltage adjusting unit independently apply to the first driving unit in response to the swing operation of the swing operating unit. The first driving means and the second driving means are adjusted so that the optical axes of the first reflector and the second reflector are swung by the same angle. Therefore, it is possible to simultaneously adjust the optical axes of the two lamps by operating the swing operation means.

  According to the fourth aspect of the present invention, when the distance from the first support point to the first rod is L1, and the distance from the second support point to the second rod is L2, the second voltage adjusting means. The first voltage adjusting means and the second voltage adjusting means so that the voltage value of the driving voltage adjusted by the step becomes a voltage value of L2 / L1 as compared with the voltage value of the driving voltage adjusted by the first voltage adjusting means. Since the voltage is adjusted in this way, the optical axis can be changed by the same angle even when the reflectors of the two lamps are different in size.

  Hereinafter, an optical axis adjustment system according to the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of an optical axis adjustment system according to the present invention.

  The optical axis adjustment system 20 includes a pair of headlamps 21 that can adjust the optical axis, a pair of fog lamps (auxiliary lamps) 22 that can adjust the optical axis, a voltage divider 23 for the headlamp 21, and a fog lamp 22. Voltage divider 24 and an operation switch 25 for adjusting voltage values of the voltage dividers 23 and 24 are provided. One of the pair of headlamps 21 is installed on the right side in front of the vehicle, and the other is installed on the left side in front of the vehicle. The same applies to the pair of fog lamps 22.

  As shown in FIG. 2A, the headlamp 21 includes a reflector 31 in which a bulb 30 is installed in the center, a support member 32 that supports the reflector 31, and a rod drive device 33 that swings the reflector 31. It has.

  A support column 35 that is swingably held by the support member 32 is formed on the upper back surface of the reflector 31, and a ball joint portion 36 having a spherical shape is formed at the tip of the support column 35. The support member 32 is formed in a housing (not shown), and a joint receiving portion 37 that includes the spherical body of the ball joint portion 36 and allows the support column 35 to tilt is formed. The joint receiving portion 37 has a spherical concave shape corresponding to the spherical shape of the ball joint portion 36, and the ball joint portion 36 is pressed into the joint receiving portion 37 by pressing the ball joint portion 36 into the concave portion of the joint receiving portion 37. The structure is engaged.

  Further, on the lower back surface of the reflector 31, a rod engaging column 40 that engages with an end portion of a rod 39 described below is formed.

  The rod driving device 33 is engaged with the end of the rod engaging column 40 to swing the reflector 31 and the rod 39 is moved forward and backward according to the voltage value applied from the voltage divider 23. And a rod driving unit 41 including a DC motor. A ball joint portion 42 is formed at the tip of the rod 39 in the same manner as the support column 35, and a joint receiving portion 43 including the ball joint portion 42 is formed at the rod engagement column 40. Similar to the joint receiving portion 37, the joint receiving portion 43 has a spherical concave shape corresponding to the spherical shape of the ball joint portion 42. By pressing the ball joint portion 42 into the concave portion of the joint receiving portion 43, The portion 42 is structured to engage with the joint receiving portion 43.

  The rod drive unit 41 changes the advance / retreat amount of the rod 39 according to the applied voltage value. In this embodiment, when the applied voltage is 1V, 2V, 3V, and 4V, the rod drive unit 41 changes the advance / retreat amount of the rod 38 in 1 to 4 steps, so that the optical axis Change the angle to 4 levels.

  FIG. 2B is a diagram showing a schematic configuration of the fog lamp 22. Similarly to the headlamp 21, the fog lamp 22 also includes a reflector 51 in which a bulb 50 is installed at the center, and a support member 52 that supports the reflector 51. And a rod driving device 53 for swinging the reflector 51. Similarly to the headlamp 21, the fog lamp 22 also has a support column 56 having a ball joint portion 55 formed on the upper back surface of the reflector 51, and a rod engagement column 57 formed on the lower back surface of the reflector 51. .

  The fog lamp 22 is generally attached to the lower side (from the ground) as compared with the head lamp 21, and the irradiation range thereof is narrower than that of the head lamp 21. Therefore, in the present embodiment, the size of the reflector 51 is the size of the head lamp 21. It is smaller than the size of the reflector 31 used in the above. Therefore, in the case of the headlamp 21, the length from the ball joint portion 36 to the rod engaging column 40 is L1, whereas in the case of the fog lamp 22, the length from the ball joint portion 55 to the rod engaging column. The length L2 up to 57 is shorter than L1. The rod 54 and the rod driving device 58 used for the fog lamp 22 have the same structure and shape as those used for the headlamp 21.

  The voltage dividers 23 and 24 change the drive voltage supplied from the vehicle power supply (DC voltage 12V) 60 to a predetermined voltage value by switching resistance values provided in the voltage dividers 23 and 24. The voltage divider 23 for the headlamp 21 changes the drive voltage of 12V to four voltage values of 1V, 2V, 3V, and 4V. The change of the voltage value is changed according to the operation of the adjustment switch 25, and the adjustment switch 25 changes the voltage value by changing the resistance in the voltage dividers 23 and 24 as shown in FIG.

  The operation of the adjustment switch 25 is also linked to the change of the resistance value in the voltage divider 24 for the fog lamp 22, and the voltage value is changed according to the operation of the adjustment switch 25. However, the voltage value reduced in the voltage divider 24 is not the voltage values 1V, 2V, 3V, and 4V reduced in the voltage divider 23. If this driving voltage is applied to the rod drive unit 58 for the fog lamp 22 as it is, the advance / retreat amount of the rod 54 becomes the same as the advance / retreat amount of the rod 39 for the headlamp 21, so the optical axis change angle of the fog lamp 22 is changed. As a result, the angle of change of the optical axis of the headlamp 21 becomes larger. In order to change the optical axis of the headlamp 21 and the optical axis of the fog lamp 22 by the same angle in accordance with the operation of the adjustment switch 25, the rod drive unit 58 is adjusted in consideration of the difference in size of the reflectors 31 and 51. It is necessary to adjust the voltage value to be applied so that the advance / retreat amount of the rod 54 is smaller than the advance / retreat amount of the rod 39. For this reason, the voltage divider 24 reduces the voltage value of the drive voltage to a value lower by L2 / L1 than the voltage value reduced by the voltage divider 23, adjusts the advance / retreat amount of the rod 54, and the headlamp 21. And the change angle of the optical axis of the fog lamp 22 are the same angle. Specifically, when L2 / L1 = 0.8, the voltage divider is 0.8V (1V × 0.8), 1.6V (2V × 0.8), 2.4V (3V × 0. 8) Adjust the voltage value to a value of 3.2 V (4 V × 0.8) and apply a drive voltage to the rod drive unit 58.

  In this way, by changing the voltage value of the voltage divider 23 for the headlamp 21 and the voltage value of the voltage divider 24 for the fog lamp 22 simultaneously in accordance with the operation of one adjustment switch 25, the headlamp 21. Therefore, it is possible to adjust the optical axis by one operation with one adjustment switch 25 without separately preparing and operating the adjustment switch for fog lamp 22 and the adjustment switch for fog lamp 22. Furthermore, by making the voltage value reduced by the voltage divider 24 L2 / L1 times the voltage value reduced by the voltage divider 23, the advance / retreat amount of the rod 54 of the rod drive unit 58 can be reduced. Even when the size of the reflector 31 for the headlamp 21 and the size of the reflector 51 for the fog lamp 22 are different from each other, the optical axis can be changed by the same angle θ. Become.

  FIG. 4 is a schematic configuration diagram illustrating an optical axis adjustment system 70 according to the second embodiment. Since the configurations of the headlamp 21 and the fog lamp 22 are the same as those in the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  The optical axis adjustment system 70 is provided with two voltage dividers 71 and 72, and the voltage value reduced by the first voltage divider 71 depends on the operation of the operation switch 73 as shown in FIG. It is reduced to two voltage values of 1V, 2V, 3V, and 4V. The voltage divided by the first voltage divider 71 is applied to the two sets of headlamps 21 and the second voltage divider 72 that are arranged in parallel.

  The second voltage divider 72 is connected to the two fog lamps 22, and the voltage value reduced by the first voltage divider 71 in the second voltage divider 72 is set so that the optical axis change angle of the fog lamp 22 is the headlamp 21. The optical axis change angle θ is adjusted to be the same angle and applied to the fog lamp 22. Specifically, when L2 / L1 = 0.8, the second voltage divider 72 adjusts the voltage value to 0.8V, 1.6V, 2.4V, 3.2V and drives the rod drive unit. Apply voltage. With this configuration, it is possible to simultaneously change the voltage value of the drive voltage applied to the headlamp 21 and the voltage value of the drive voltage applied to the fog lamp 22 according to the operation of the adjustment switch 73. . Further, the second voltage divider 72 is arranged in series with the first voltage divider 71, and the drive voltage supplied from the first voltage divider 71 in the second voltage divider 72 is always set to a value L2 / L1 times. By changing, the amount of advance and retreat of the rod of the fog lamp 22 is made smaller than the amount of advance and retreat of the rod of the headlight 21, and the size of the reflector for the headlamp 21 and the size of the reflector for the fog lamp 22 are different. Also, the optical axis can be changed by the same angle θ.

  Although the optical axis adjustment system according to the present invention has been described with reference to the drawings, the optical axis adjustment system according to the present invention is not limited to the above-described one. For example, in addition to the fog lamp 22 whose optical axis is adjusted, an auxiliary lamp such as a call lamp or a lamp that swivels in response to a handle operation may be used. Furthermore, the voltage value adjusted by the voltage divider can be adjusted not only in four stages but also in multiple stages, so that the optical axis can be adjusted with higher accuracy.

  When the drive voltage applied to the rod drive device is an AC voltage, the optical axis can be adjusted similarly by using a voltage divider instead of the voltage divider.

1 is a schematic configuration diagram illustrating an optical axis adjustment system according to Embodiment 1. FIG. (A) is a schematic block diagram of the headlamp shown in FIG. 1, (b) is a schematic block diagram of the fog lamp shown in FIG. FIG. 2 is a circuit diagram showing an internal configuration of the voltage divider shown in FIG. 1. FIG. 6 is a schematic configuration diagram illustrating an optical axis adjustment system according to a second embodiment. FIG. 5 is a circuit diagram showing an internal configuration of the voltage divider shown in FIG. 4. It is the block diagram which added the optical axis adjustment mechanism of the auxiliary light to the conventional optical axis adjustment system. (A) is a schematic block diagram of the headlamp shown in FIG. 6, (b) is a schematic block diagram of the fog lamp shown in FIG. 6, (c) is the amount of advance and retreat of the rod and the optical axis in the headlamp. It is the figure which showed the relationship with the fluctuation angle of (d), (d) is the figure which showed the relationship between the amount of rod advance and retreat in a fog lamp, and the fluctuation angle of an optical axis.

Explanation of symbols

1, 21 Headlight 2, 31, 51 Reflector 4, 10, 39, 54 Rod 5, 11, 41, 58 Rod drive 7 Auxiliary light 14, 20, 70 Optical axis control system 15 Power supply for vehicle 16 Voltage divider ( Voltage adjustment means)
23, 71 Voltage divider, first voltage divider (first voltage adjusting means)
24, 72 voltage divider, second voltage divider (second voltage adjusting means)
17, 25, 73 Adjustment switch 22 Fog lamp (auxiliary light)
32, 52 Support member 33, 53, 41, 58 Rod drive unit 35, 56 Support column 36, 42, 55 Joint ball unit 37, 43, 55 Joint receiving unit 40, 57 Rod engagement column 15, 60 Power source for vehicle ( Power supply means)

Claims (4)

A first lamp that adjusts the optical axis by swinging a first reflector that is swingably mounted by a first drive means;
A second lamp for adjusting an optical axis by swinging a second reflector smaller than the first reflector by a second drive means;
Power supply means for applying a drive voltage to the first drive means and the second drive means;
Rocking operation means for changing the voltage value output from the power supply means and simultaneously rocking the first reflector and the second reflector in the same direction;
At least one of the first drive means or the second drive means so that the optical axes of the first reflector and the second reflector swing by the same angle in accordance with the swing operation of the swing operation means. An optical axis control system for a vehicular lamp, comprising voltage adjusting means for adjusting a voltage value of a driving voltage applied to the vehicle. The voltage adjusting means includes a first voltage adjusting means for adjusting a voltage value of a driving voltage applied to the first driving means, and a second voltage adjusting means for adjusting a voltage value of a driving voltage applied to the second driving means. And
The swing operation means controls the first voltage adjusting means to adjust the voltage value of the driving voltage applied from the power supply means to the first driving means, and the second voltage adjusting means is the first voltage adjusting means. By adjusting the drive voltage adjusted in the voltage adjusting means to a voltage value suitable for the optical axis adjustment amount of the second reflector, the optical axes of the first reflector and the second reflector are swung by the same angle. The optical axis control system according to claim 1, wherein the first driving unit and the second driving unit are driven as described above. The voltage adjusting means includes a first voltage adjusting means for adjusting a voltage value of a driving voltage applied to the first driving means, and a second voltage adjusting means for adjusting a voltage value of a driving voltage applied to the second driving means. And
The first voltage adjusting unit and the second voltage adjusting unit are respectively configured such that the voltage value of the driving voltage applied to the first driving unit and the second driving independently according to the swing operation of the swing operating unit. By adjusting the voltage value of the drive voltage applied to the means, the first drive means and the second drive means so that the optical axes of the first reflector and the second reflector are swung by the same angle. The optical axis control system according to claim 1, wherein the optical axis control system is driven. The first driving means engages with an end of the first reflector that is swingably installed at a first support point, and advances and retreats according to the voltage value of the driving voltage adjusted by the first voltage adjusting means. A first rod that moves and swings the first reflector;
The second driving means engages with an end of the second reflector that is swingably installed at a second support point, and advances and retreats according to the voltage value of the driving voltage procured by the second voltage adjusting means. A second rod that moves to swing the second reflector;
When the distance from the first support point to the first rod is L1, and the distance from the second support point to the second rod is L2, the driving voltage adjusted by the second voltage adjusting means The first voltage adjusting means and the second voltage adjusting means adjust the voltage so that the voltage value is L2 / L1 compared to the voltage value of the driving voltage adjusted by the first voltage adjusting means. The optical axis control system according to claim 2, wherein the optical axis control system is performed.

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