JPS62222507A - Head lamp for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle headlamp, and more specifically, a part of the irradiated light is irradiated in an arbitrary direction to improve visibility. This relates to vehicle headlights that can be used.

[Conventional technology]

A conventional vehicle headlamp will be explained with reference to FIG.

In the figure, 1 is a car, and 2 is a headlamp installed on the left and right sides of the front of the car 1. A bulb (not shown) is placed in the reflector so that the filament is located near the focal point of the reflector, and a bulb (not shown) is placed in the front opening of the reflector to control the reflected light from the reflector to a predetermined value. The light is turned on and off by a switch (not shown) provided in the driver's seat of the automobile 1.

Reference numeral 3 denotes a cornering lamp installed in the left and right corners of the front part of the automobile 1 adjacent to the headlamp 2. (not shown) and a lens 30 that is disposed in the front opening of the reflecting section and irradiates the reflected light from the reflecting section obliquely forward in a predetermined light distribution pattern. ) lights up when operated,
Lights out.

In such a vehicle headlight, when the headlight 2 is turned on when driving at night, light is emitted to the front, illuminating the front. At this time,
The light distribution pattern by the headlamp 2 is a predetermined light distribution pattern shown by number MP in FIG. The light distribution pattern MP shown in FIG. -■ is the vertical center line, and H-H is the horizontal center line.

Next, when cornering during night driving, for example, when the steering wheel is turned to the left, the left cornering lamp 3 lights up, and the light distribution shown diagonally to the left by the symbol SP and the hatched part in FIG. It can be illuminated in a pattern to improve visibility when cornering at night.

Further, when cornering is completed and the steering wheel is returned to its original position, the left cornering lamp 3 is turned off.

Although not shown in the drawings, when the steering wheel is turned to the right, the right cornering lamp turns on, illuminating the area diagonally to the right, and when the steering wheel is turned back, the right cornering lamp turns off.

[Problem that the invention seeks to solve]

However, the above-mentioned conventional vehicle headlights include a headlight 2 that obtains a main light distribution pattern MP for illuminating the front, and a cornering lamp that obtains an auxiliary light distribution pattern SP for illuminating the diagonally forward direction. 3 and 2 lamps are required,
The cost is relatively high, and the space required for assembly into the automobile 1 is large. Furthermore, since there are two valves, there is a problem that current is consumed and a heavy burden is placed on the battery and the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle headlamp that is inexpensive, requires a small installation space, and can reduce the burden on batteries and the like.

[Means for solving problems]

The present invention includes a first reflecting surface made of a substantially concave paraboloid of rotation, a filament of a bulb disposed near the focal point of the first reflecting surface, and a filament of a bulb disposed so as to be rotatable left and right about a vertical axis. , a second reflective surface that controls the irradiation direction of a portion of the reflected light from the first reflective surface by both the left and right sides, and a second reflective surface that is linked to the second reflective surface.
It is characterized by comprising a drive device that rotates the reflective surface left and right.

[Effect]

The present invention provides main light distribution for illuminating the front with a single headlamp by rotating the second reflecting surface left and right and emitting part of the reflected light from the first reflecting surface in an arbitrary direction. pattern and an auxiliary light distribution pattern for illuminating the diagonally forward area.

〔Example〕

Hereinafter, two of the embodiments of the vehicle headlamp of the present invention will be described as a first example.
This will be explained with reference to FIGS. 4 to 4.

1 and 2 show a first embodiment of the vehicle headlamp of the present invention, and FIG. 1 is an explanatory diagram showing the relationship between the rotation of the second reflecting section and the change in the light distribution pattern. , FIG. 2 is a partial perspective view of the second reflecting section and the driving device.

In the figure, the same reference numerals as in FIG. 5 indicate the same parts. Reference numeral 4 denotes a first reflecting section having a first reflecting surface 40 having a substantially concave paraboloid of rotation shape. Reference numeral 5 denotes a bulb in which a filament 51 is disposed within a glass bulb 50, and this bulb 5 is connected to the first reflecting section 4.
Inside, a filament 51 is arranged at or near the focal point of the substantially concave paraboloid of rotation reflection surface 40 of the first reflecting section 4. Reference numeral 6 denotes a second reflecting section having a flat plate shape. The second reflecting section 6 has left and right side surfaces 60L, 6
0R are parallel to each other, and both left and right sides 60L, 6
Reflection planes (second reflection surfaces) for controlling the irradiation direction of the reflected light from the substantially concave paraboloid of rotation reflection surface 40 of the first reflection section 4 are provided at 0R, respectively. The shaft 61 is located approximately at the center of the upper surface of the second reflecting section 6, and the left and right page reflecting planes 60L of the second reflecting section 6 are
It is integrally planted parallel to 60R and perpendicular to the upper surface of the second reflecting section 6. This axis 61 is placed on the upper wall of the first reflecting section 4 so that the axis 61 is perpendicular to the optical axis (the axis of the substantially concave rotating parabolic reflecting surface 40 of the first reflecting section 4 > X-X). As a result, the second reflecting section 6 is disposed above the bulb 5 in the first reflecting section 4 so as to be able to rotate left and right about the axis 61, that is, the vertical axis 61. 7 is a drive device placed on the earthen wall of the first reflecting section 4, which is a pulse motor in this example.
The output shaft (not shown) of this pulse motor 7 is linked to the above-mentioned vertical shaft 61. On the other hand, the pulse motor 7 is linked to an operation switch (not shown) on a driver's seat (not shown). The above-mentioned second reflection section 6 has left and right re-reflection planes 60L, 60.
A state in which R is parallel to the optical axis XX is defined as a neutral state.

The vehicle headlamp of the present invention in this embodiment has the above-mentioned configuration, and its operation will be explained below.

First, while the second reflecting section 6 is in a neutral state, the headlight operation switch on the driver's seat is operated to turn on the headlight. Then, the filament 51 emits light, and the light beam emitted from the filament 51 is reflected by the substantially concave paraboloid of rotation reflection surface 4 of the first reflection section 4.
It is reflected at 0, changes its course and moves forward parallel to the optical axis XX. Furthermore, it is irradiated forward from the lens 20,
As shown in FIG. 1, the front is illuminated with a predetermined main light distribution pattern MP.

Next, operate the pulse motor operation switch on the driver's seat to drive the pulse motor 7, and move the second reflector 6 to the vertical axis 61.
Rotate left and right around the center. For example, as shown in FIG. 2, when the second reflecting section 6 is rotated to the right, a portion of the reflected light from the substantially concave rotating parabolic reflecting surface 40 of the first reflecting section 4 is rotated to the right. Reflection plane 6 on the right side of the second reflection section 6 (R)
It reflected at 0R and changed its course diagonally forward to the right, as shown by the chain double-dashed line arrow in Figure 2. Furthermore, lens 2o
The auxiliary light distribution pattern R3P shown by hatching in FIG. 1 can illuminate the diagonally right front, for example, the road shoulder or corner on the right side.

As a result, visibility on the right side can be improved. Note that at this time, since a part of the main light distribution pattern MP is used as the auxiliary light distribution pattern R3P, the main light distribution pattern MP
There are some parts of the interior where the light intensity is reduced, but this is not a problem if you think about it from the perspective of focusing the lighting on the areas the driver wants to see.

Similarly, when the second reflecting section 6 is rotated to the left, the first reflecting section 6 is rotated to the left.
A part of the reflected light from the reflecting section 4 is reflected on the left reflecting plane 60L of the second reflecting section 6 (L) rotated to the left, and
The auxiliary light distribution pattern LSP indicated by hatching in the figure illuminates the diagonally forward left side, thereby improving visibility on the left side.

In this way, by rotating the second reflecting section 6 left and right, a part of the reflected light from the first reflecting section 4 can be irradiated diagonally forward to the left or right. A main light distribution pattern MP for illuminating the front, and an auxiliary light distribution pattern LSP or R3P for illuminating the diagonally forward left or right side are obtained.

3 and 4 show a second embodiment of the vehicle headlamp of the present invention, and FIG. 3 is an explanatory diagram showing the relationship between the rotation of the second reflecting section and the change in the light distribution pattern. , FIG. 4 is a partial perspective view of the second reflecting section and the driving device.

In the figures, the same reference numerals as in FIGS. 1, 2, and 5 indicate the same parts. Reference numeral 8 denotes a connector that connects the vertical shaft 61 of the second reflecting section 6 and the output shaft 71 of the pulse motorf,
This connector 8 has a bad breath 80 fixed to the upper end surface of the vertical shaft 61.
It consists of five tools 81 fixed to the lower end surface of the output shaft 71 and a split pin 82. The second
The vertical shaft 61 of the reflecting section 6 and the output shaft 71 of the pulse motor 7 are connected, and the second reflecting section 6 is configured to be vertically rotatable about the horizontal axis of the split pin 82 . Reference numeral 9 denotes a drive device for vertically rotating the second reflecting section 6 around a split pin 82 (horizontal axis), and this drive device 9 has a built-in solenoid (not shown) and a spring (not shown). A main body 90, and upper and lower rods 91 protruding from the lower surface of the main body 90 so as to be movable forward and backward;
A guide body 92 fixed to the lower ends of the upper and lower rods 91, a guide groove 93 provided in the guide body 92 in an arc shape around the vertical shaft 61, and a base end fixed horizontally to the middle part of the vertical shaft 61, The guide 893 is composed of a pin 94 whose tip is inserted into a guide groove 93, and the pin 94 is engaged with the guide body 92 as the second reflecting section 6 rotates from side to side about the vertical axis 61. It is configured so that it does not interfere with rotation from side to side while maintaining the same position.

In the normal state of the drive device 9 described above, the upper and lower rods 91 and the guide body 92 are in a raised state due to the force of the spring. Then, when the solenoid is energized, the upper and lower rods 91 and the guide body 92 descend against the force of the spring, and the guide body 92
The second reflecting portion 6 rotates around the split pin 82 via the pin 94 that engages with the split pin 82 to be in an inclined state. When the power to the solenoid is cut off, the upper and lower rods 91 and the guide body 92 rise due to the return force of the spring, and the second reflecting part 6 moves around the split pin 82 via the pin 94 that engages with the guide body 92. It rotates and returns to its original vertical position. The main body 9o of the drive device 9 thus constructed is placed on the earthen wall of the first reflecting section 4, and the solenoid is connected to the battery via an operation switch (not shown) on the driver's seat.

The vehicle headlamp of the present invention in this embodiment has the above-mentioned configuration, and its operation will be explained below.

First, when the second reflector 6 is in a neutral state and the headlight operation switch on the driver's seat is operated to turn on the headlight, the third reflector 6 is turned on.
The front is illuminated with a predetermined main light distribution pattern MP shown by a solid line in the figure.

Next, operate the pulse motor operation switch on the driver's seat to drive the pulse motor 7, and move the second reflector 6 to the vertical axis 61.
Rotate left and right around the center. Then, a part of the reflected light from the first reflecting section 4 is transmitted to the right reflecting plane 60R1 of the second reflecting section 6 rotated to the right or to the left reflecting plane 60R1 of the second reflecting section 6 rotated to the left. 60L, and the auxiliary light distribution pattern R3P or LSP shown by the dashed line in FIG. 3 can illuminate the diagonally right front or left diagonally front.

Further, while the second reflecting portion 6 is still rotated, for example, to the right, the driver operates the drive device operation switch on the driver's seat to energize the solenoid of the drive device 9. Then, as shown by the dotted chain line in FIG. 3, the upper and lower rods 91 and the guide body 92 descend, and the second reflecting section 6 moves clockwise around the cotter pin 82 (horizontal axis) when viewed from the front. Rotate to. A part of the reflected light from the first reflecting section 4 is reflected by the right reflection plane 60R of the second reflecting section 6 (U, R), and an auxiliary light distribution pattern U shown by the dashed line in FIG. Use R3P to illuminate the area diagonally to the right. Furthermore, when the solenoid of the drive device 9 is energized while the second reflecting section 6 is still rotated to the left,
Similarly, the auxiliary light distribution pattern U shown by the dashed line in Fig. 3
, LSP can illuminate the left diagonal front.

Then, the second reflecting section 6 is moved left and right around the vertical axis 61 by a pulse motor, and the split pin 8 is moved by a drive device.
By rotating up and down about the horizontal axis of 2, a part of the reflected light from the first reflecting section 4 can be irradiated diagonally forward to the left or right, so a single headlight can illuminate the front diagonally. A main light distribution pattern MP for illuminating the area, and auxiliary light distribution patterns LSP, U, LS for illuminating the front left or right diagonally.
P.

R3P, U, and R3P are obtained.

Note that the drive device 9 of the second embodiment described above uses a pulse motor instead of a solenoid or a spring type, and can steplessly adjust the rotation of the second reflection section 6 about the split pin 82. It may be configured as follows. In addition, the second reflective surface does not need to be a flat surface as long as the direction of irradiation of the reflected light from the first reflective surface can be controlled.

Further, the light distribution patterns shown in FIGS. 1 and 3 can be obtained by arranging a screen in front of the vehicle headlamp of the present invention and irradiating light toward the screen.

Furthermore, depending on the design of the lens, the light of the auxiliary light distribution pattern can be used as spot light.

〔Effect of the invention〕

As is clear from the above, in the vehicle headlamp of the present invention, the second reflecting surface, which controls the direction of irradiation of the reflected light from the first reflecting surface of the substantially concave paraboloid of rotation, is aligned with the vertical axis. The second reflecting surface is arranged so as to be rotatable left and right around the center, and a driving device is linked to the second reflecting surface so that the second reflecting surface can be rotated left and right. By rotating it left and right, a part of the reflected light from the first reflecting surface can be irradiated in an arbitrary direction. As a result, a main light distribution pattern for illuminating the front with one headlamp and an auxiliary light distribution pattern for illuminating the front diagonally are obtained.Therefore, a main light distribution pattern for illuminating the front can be obtained. Compared to conventional vehicle headlamps, which require two lights: a headlamp to provide light and a cornering lamp to provide an auxiliary light distribution pattern for illuminating diagonally and in front, the cost is lower and installation is easier. This requires less space and can further reduce the burden on batteries and the like.

[Brief explanation of drawings]

1 and 2 show a first embodiment of the vehicle headlamp of the present invention, and FIG. 1 is an explanatory diagram showing the relationship between the rotation of the second reflecting section and the change in the light distribution pattern. , FIG. 2 is a partial perspective view of the second reflecting section and the driving device. 3 and 4 show a second embodiment of the vehicle headlamp of the present invention, and FIG. 3 is an explanatory diagram showing the relationship between the rotation of the second reflecting section and the change in the light distribution pattern. , FIG. 4 is a partial perspective view of the second reflecting section and the driving device. FIG. 5 is an explanatory diagram of a light distribution pattern of a conventional vehicle headlamp. 4...First reflecting part, 40...Substantially concave paraboloid of rotation reflection surface (
5... Bulb, 51... Filament, 6... Second reflecting section, 60L, 60R... Reflecting plane (second reflecting surface), 61... Vertical axis, 7 ...Pulse motor (drive device), 82...Split bottle (horizontal axis)
, 9... Drive device.

Claims (1)

[Claims] 1. A first reflecting surface made of a substantially concave paraboloid of rotation, and a filament of a bulb disposed near the focal point of the first reflecting surface;
A second reflecting surface that is arranged to be rotatable left and right about a vertical axis and controls the irradiation direction of a portion of the reflected light from the first reflecting surface by both left and right sides; A vehicle headlamp, comprising: a drive device for rotating the second reflective surface left and right. 2. The second reflecting surface is arranged to be rotatable left and right around a vertical axis and up and down around a horizontal axis, and is configured to be able to rotate left and right and up and down by a drive device. A vehicle headlamp according to claim 1.