JP2009295387A - Vehicular headlamp device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular headlamp device including a rotary shade, having construction for actualizing quick change-over between a high-beam light distribution pattern and a low-beam light distribution pattern. <P>SOLUTION: The vehicular headlamp device 10 includes a movable shade 34 movable forward/backward relative to the optical axis of a bulb 28, the rotary shade 32 to be rotationally driven to selectively form one of a plurality of light distribution patterns, and a solenoid 38 for moving the movable shade 34. The movable shade 34 interrupts part of the light of the bulb 28 at the forward movement position to form a standard low-beam light distribution pattern. It permits the formation of the other light distribution pattern at the backward movement position. The solenoid 38 moves the movable shade 34 to the forward movement position on a priority basis during non-control to actualize quick change-over between the high-beam light distribution pattern and the low-beam light distribution pattern. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle headlamp device, and more particularly to a structure of a vehicle headlamp device that switches between a low beam and a high beam using a shade.

  The vehicular headlamp device irradiates a low beam or a high beam by reflecting light from a light source forward by a reflector. The light distribution pattern of the irradiated beam is different between the low beam and the high beam. In this case, there is one that switches between a low beam and a high beam by switching the lighting using two light sources. Also known is a vehicular headlamp device that forms a light distribution pattern for low beam by blocking a part of the beam irradiated by a single light source, and forms a light distribution pattern for high beam when it is not blocked. ing. The former case is a so-called light distribution fixed type headlamp of four lamp type, and the latter case can be configured as a so-called variable light distribution type headlamp of two lamp type.

  As one of beam switching methods when a single light source is used, a method of switching a beam by moving a light shielding member called a shade according to a light distribution pattern to be formed has been proposed. For example, a rotary shade capable of rotating around a horizontal support shaft has been proposed. The rotary shade is rotated by a beam switching device including an actuator such as a motor. On the outer peripheral surface of the rotary shade, a plurality of ridge lines are formed in the axial direction. A certain ridge line portion forms a light distribution pattern for left light distribution low beam, and another ridge line portion forms a light distribution pattern for right light distribution low beam. In addition, unlike the other ridge lines, the ridge lines that are largely cut into the recesses form a high beam light distribution pattern without blocking light from the light source (see, for example, Patent Document 1).

The rotary shade described above can form a plurality of ridge lines on the outer peripheral surface of the rotation support shaft, and can easily switch between a plurality of types of light distribution patterns. Therefore, it is possible to configure a multi-function headlamp device using various light distribution patterns, and it is expected to be adopted for various vehicles.
JP 2004-349120 A

  As described above, in the case of the rotary shade, the rotation for switching the shade is performed by the motor. When the shade drive system is constituted by a motor, it is necessary to take some measures in the drive control of the rotary shade. For example, switching between a low beam and a high beam needs to be performed quickly. In particular, when the presence of an oncoming vehicle or a pedestrian is confirmed when using a high beam, it is necessary to quickly switch to a low beam. In addition, “passing” used to alert an oncoming vehicle or a pedestrian needs to be performed quickly and continuously between low beam and high beam. However, high-speed rotation is not preferable because it is necessary to stop at an accurate rotation position in order to form a desired light distribution pattern in the rotary shade. That is, since there is a limit to the control speed of the rotary shade, when using the rotary shade, a structure capable of realizing high-speed switching between the high beam light distribution pattern and the low beam light distribution pattern is desired. Further, when the shade drive system is configured to include a motor, it is necessary to provide a countermeasure when a malfunction occurs in the motor. For example, when a motor breaks down in a high beam irradiation state or a gear that decelerates the motor becomes defective and becomes uncontrollable, the high beam irradiation state may be maintained. In this case, glare which is dazzling with discomfort may be given to oncoming vehicles and pedestrians, which is not preferable for running. Thus, there is a demand for a structure capable of high-speed switching to a low beam light distribution pattern when an abnormality occurs in the shade drive system.

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle having a structure capable of realizing high-speed switching between a high beam light distribution pattern and a low beam light distribution pattern even in a configuration including a rotary shade. An object of the present invention is to provide a headlight device for use.

  In order to solve the above-described problems, in a vehicle headlamp device according to an aspect of the present invention, a light source capable of irradiating light forward of the vehicle, and capable of moving forward and backward with respect to the optical axis of the light source, the light source at an advanced position A part of the light is blocked to form a standard low beam light distribution pattern, and a plurality of light distribution patterns other than the standard low beam light distribution pattern are formed, and a movable shade that allows other light distribution patterns to be formed at the retracted position. A rotary shade that selectively forms one of the plurality of light distribution patterns by being driven to rotate, and a mechanism that moves the movable shade forward and backward, and moves the movable shade forward when not controlled And a shade moving mechanism for preferentially moving to a position.

  The standard low beam light distribution pattern is, for example, a light distribution pattern having a cut-off line in which the right light distribution with respect to the horizontal line is lower than the left light distribution when the left-hand traffic of the vehicle is defined by the Road Traffic Law. The moving shade moves at least two positions: an advance position where the light from the light source is blocked by moving forward and backward with respect to the optical axis, and a retracted position where the light is not blocked. The rotary shade is driven to rotate so as to selectively form any one of a plurality of light distribution patterns. Therefore, when the left-hand traffic of the vehicle is determined, a light distribution pattern having a cut-off line in which the right light distribution is lower than the left light distribution is formed at the advanced position, and the light distribution pattern that can be formed by the rotary shade is formed at the retracted position. Allow the formation of a light pattern. Then, the shade moving mechanism preferentially moves the moving shade to the advanced position when not controlled. That is, the standard low beam light distribution pattern is preferentially formed when the shade moving mechanism is not controlled. As the shade moving mechanism, for example, a solenoid-type actuator that switches between advancing and retracting positions according to control and non-control can be employed.

  According to this aspect, even in the configuration including the rotary shade, switching between the standard low beam light distribution pattern and the other light distribution patterns can be easily performed by switching between control and non-control of the shade moving mechanism.

  In the above aspect, the rotary shade may include a standard high beam light distribution pattern in the plurality of light distribution patterns, and a standard stop position of the rotary shade may be a formation position of the standard high beam light distribution pattern. . The standard high-beam light distribution pattern can be a high-beam light distribution pattern that is preferably used when there is no object such as a vehicle or a pedestrian that needs to consider glare in front of the host vehicle. According to this aspect, it is possible to switch between the standard low beam light distribution pattern and the standard high beam light distribution pattern by switching between control and non-control of the shade moving mechanism, and so-called “passing” by the headlight device is easily realized. it can.

  In the above aspect, the rotation shade may be preferentially returned to the standard stop position at least when the vehicle is started. The rotary shade can selectively form any one of a plurality of light distribution patterns by being driven to rotate. Therefore, the rotation posture can be initialized by preferentially returning the rotation shade to the standard stop position when the vehicle is started. As a result, the reliability of rotation control in the rotary shade can be improved. In addition, a standard high beam light distribution pattern that is frequently used next to the standard low beam light distribution pattern can be prepared when the vehicle is started, and can be quickly switched to the standard high beam light distribution pattern. Moreover, it becomes possible to make it possible to pass when the vehicle is started, and the passing can be performed quickly.

  In the above aspect, the shade movement mechanism may cause the movement shade to be preferentially moved to the advance position when rotation control of the rotation shade becomes abnormal. For example, if any abnormality occurs in the rotation control system of the rotary shade when the movable shade is in the retracted position, the movable shade is preferentially moved to the advanced position. Since this operation is performed when the shade moving mechanism is in an uncontrolled state, it can be realized only by cutting the driving force with respect to the shade moving mechanism. A mechanical return mechanism may be provided that moves the moving shade to the advanced position even when the shade moving mechanism cannot be controlled. As a result, a standard low-beam light distribution pattern can be formed preferentially when a control abnormality occurs in the rotary shade, realizing a fail-safe function of control abnormality and giving glare to oncoming vehicles and pedestrians It is possible to quickly shift to a light distribution state with a low possibility.

  In the above aspect, the rotary shade may be pre-rotated to a position where any one of the plurality of light distribution patterns is formed when the movable shade is in the advanced position. When the rotary shade rotates to select any one of a plurality of light distribution patterns, it is assumed that the rotary shade is rotated after the movement shade is moved to the retracted position. In this case, another light distribution pattern may be formed in the process of forming a desired light distribution pattern, which may give the driver a sense of incongruity. Therefore, when the moving shade is in the advanced position, the rotating shade is rotated in advance to a position where any one of a plurality of light distribution patterns is formed, so that the moving shade is rotated when moved to the retracted position. A desired light distribution pattern by the shade can be immediately formed. As a result, it is possible to prevent the driver from feeling uncomfortable when the light distribution pattern is switched.

  According to the vehicle headlamp device of the present invention, high-speed switching between the high beam light distribution pattern and the low beam light distribution pattern can be realized even with a configuration including a rotary shade.

  Hereinafter, an embodiment of the present invention (hereinafter referred to as an embodiment) will be described with reference to the drawings.

  The vehicle headlamp device according to the present embodiment includes a movable shade that can move forward and backward with respect to the optical axis of the light source, a rotational shade that selectively forms any one of a plurality of light distribution patterns by rotational driving, and movement A shade moving mechanism for moving the shade. The moving shade forms a standard low beam light distribution pattern by blocking a part of the light from the light source at the advanced position. In addition, the formation of another light distribution pattern is allowed at the retracted position. The shade movement mechanism realizes high-speed switching between the high beam light distribution pattern and the low beam light distribution pattern by preferentially moving the movement shade to the advanced position when not controlled.

  FIG. 1 is a configuration diagram illustrating a schematic configuration of a vehicle headlamp device 10 including a lamp unit including a moving shade and a rotary shade according to the present embodiment.

  A vehicle headlamp apparatus 10 shown in FIG. 1 is a vehicle headlamp apparatus called a so-called variable light distribution type headlamp. The vehicle headlamp device 10 has a lamp chamber 16 formed of a lamp body 12 having an opening in the front direction of the vehicle and a transparent cover 14 covering the opening of the lamp body 12. The lamp chamber 16 houses a lamp unit 18 that irradiates light in the forward direction of the vehicle. A lamp bracket 20 planted in the lamp unit 18 and a body bracket 22 erected on the inner wall surface of the lamp body 12 are connected by a fastening member such as a screw so that the lamp unit 18 is fixed at a predetermined position in the lamp chamber 16. ing. A headlamp device control unit 24 that controls the lamp unit 18 is connected to the lower surface of the lamp unit 18. Then, the unit bracket 26 that supports the headlamp device controller 24 and the body bracket 22 that is erected on the inner wall surface of the lamp body 12 are connected by a fastening member such as a screw so that the lamp unit 18 and the headlamp device are controlled. The part 24 is fixed.

  The lamp unit 18 includes a bulb 28, a reflector 30, a rotary shade 32, a moving shade 34, and a projection lens 36. As the light source bulb 28, for example, an incandescent bulb, a halogen lamp, a discharge bulb, an LED, a neon tube, a laser light source, or the like can be used. In the present embodiment, a bulb 28 composed of a halogen lamp is shown as an example. The reflector 30 reflects the light emitted from the bulb 28 and guides it to the projection lens 36.

  The moving shade 34 functioning as the first light shielding member can move forward and backward with respect to the optical axis of the bulb 28, and blocks a part of the light from the bulb 28 at the advanced position to form a “standard low beam light distribution pattern”. The formation of another light distribution pattern is permitted at the retracted position. The standard low beam light distribution pattern is, for example, a light distribution pattern having a cut-off line with the right side light distribution lower than the left side light distribution with respect to the horizontal line when the left traffic of the vehicle is defined by the Road Traffic Law. Can do. The forward / backward movement of the moving shade 34 is executed by, for example, a solenoid 38 that functions as a shade moving mechanism. In the present embodiment, the name of the light distribution pattern is shown based on the vehicle headlamp device used in an area where the left-hand traffic of the vehicle is determined by the Road Traffic Law. Accordingly, the name of the light distribution pattern is reversed when the vehicle headlamp device used in an area where the right-hand traffic of the vehicle is defined by the Road Traffic Law is used as a reference.

  The rotary shade 32 that functions as the second light shielding member has a substantially cylindrical shape, and can form a plurality of light distribution patterns other than the standard low beam light distribution pattern. One of the light distribution patterns is selectively formed. A plurality of ridge line portions extending in the axial direction in order to form a light distribution pattern are formed on the cylindrical outer peripheral surface of the rotary shade 32 at predetermined intervals. For example, a light distribution pattern opposite to the aforementioned standard low beam light distribution pattern for left-hand traffic, that is, a light distribution pattern for right-hand traffic and having a cut-off line whose left-hand light distribution is lower than that of the right-hand light distribution is formed. This low-beam light distribution pattern for right-hand traffic can also be called a “dover low beam”. Further, the rotary shade 32 has a “horizontal cut light distribution pattern” that forms a light distribution pattern immediately before the own vehicle, a “left half high light distribution pattern” that irradiates the high beam area only on the own lane side, and a high beam only on the opposite lane side. The “right high light distribution pattern” for irradiating the area, the “standard high beam light distribution pattern” in which both the own lane and the opposite lane are the high beam areas, and the like are formed.

  When forming the standard low beam light distribution pattern, the moving shade 34 moves to an advanced position where the light emitted from the bulb 28 and reflected by the reflector 30 does not hit the rotary shade 32. Further, when the formation of a light distribution pattern other than the standard low beam light distribution pattern is permitted, the light is emitted from the bulb 28 and reflected by the reflector 30 to move to a retreat position where the light is allowed to strike the rotary shade 32. FIG. 1 is a diagram illustrating a case where the moving shade 34 is in an advanced position where a light distribution pattern for standard low beam is formed. FIG. 2 is a diagram illustrating a case where the light shade 34 forms a light distribution pattern other than the light distribution pattern for standard low beam. It is a figure which shows the case where it exists in the retracted position to accept | permit. In the case of the present embodiment, the moving shade 34 moves along at least two positions of an advance position and a retracted position along a guide member (not shown). As the solenoid 38, for example, a type in which the rod 38a is housed by a spring or the like in the main body 38b in a non-control state in which no power is supplied can be used. Therefore, when the solenoid 38 is not controlled, the rod 38a is accommodated, and the movable shade 34 is shifted to the standing posture as shown in FIG. 1 and moved to the advanced position. In this state, a part of the light emitted from the bulb 28 and reflected by the reflector 30 is blocked by the moving shade 34 to form a standard low beam light distribution pattern defined by the shape of the ridge line portion of the moving shade 34. .

  Further, at the time of control to energize the solenoid 38, the rod 38a protrudes from the main body 38b against the urging force of the spring, and moves the movable shade 34 to the tilted position as shown in FIG. In this state, the light emitted from the bulb 28 and reflected by the reflector 30 is blocked by the rotary shade 32 to form a light distribution pattern defined by the shape of any ridge line portion of the rotary shade 32.

  The headlamp device control unit 24 performs lighting control of the valve 28, energization control of the solenoid 38, rotation control of the motor 40, and the like based on various control signals provided from the vehicle side.

  FIG. 3 is a functional block diagram illustrating the configuration of the headlamp device control unit 24 and the vehicle control unit 44 on the vehicle 42 side of the vehicle headlamp device 10 configured as described above. The headlamp device controller 24 of the vehicle headlamp device 10 controls the power supply circuit 46 in accordance with an instruction from the vehicle controller 44 mounted on the vehicle 42 and controls the lighting of the bulb 28. Further, the headlamp device control unit 24 controls a solenoid control unit 48 that controls the solenoid 38 and a rotation drive control unit 50 that controls the motor 40 in accordance with an instruction from the vehicle control unit 44.

  In the case of the present embodiment, the light distribution pattern formed by the vehicle headlamp device 10 can be switched according to the operation content of the light switch 52 by the driver, and the headlamp device controller 24 is a solenoid controller. The moving shade 34 is moved to the advanced position or the retracted position by controlling the solenoid 38 via 48. Then, whether to form a standard low beam light distribution pattern or another light distribution pattern is determined. Further, according to the operation content of the light switch 52, the headlamp device control unit 24 controls the motor 40 via the rotation drive control unit 50 to change the rotation angle of the rotary shade 32. Then, it is determined which of the light distribution patterns other than the standard low beam light distribution pattern is formed.

  In addition, the vehicle headlamp device 10 according to the present embodiment detects the vehicle surroundings with various sensors regardless of the operation of the light switch 52 and forms a light distribution pattern that is optimal for the vehicle surroundings. You may make it control automatically. For example, if it is detected that there is a preceding vehicle, an oncoming vehicle, a pedestrian, etc. in front of the vehicle, the vehicle control unit 44 should prevent glare by forming a standard low beam light distribution pattern. It judges that there exists, and controls the headlamp apparatus control part 24. FIG. In addition, when it can be detected that there is no preceding vehicle, oncoming vehicle, or pedestrian in front of the vehicle, a standard high beam light distribution pattern without shading by a shade is formed to improve the driver's view. The headlamp device control unit 24 is controlled by determining that it should be performed. Similarly, when there is no preceding vehicle and there is an oncoming vehicle or pedestrian, a left high-light distribution pattern is formed, and when there is only the preceding vehicle and there is no oncoming vehicle or pedestrian, the right side Control such as forming a high light distribution pattern is performed.

  As described above, for example, a camera 54 such as a stereo camera is connected to the vehicle control unit 44 of the vehicle 42 in order to detect an object such as a preceding vehicle, an oncoming vehicle, or a pedestrian. When the image data provided from the camera 54 includes an image including a feature point indicating a vehicle or a pedestrian that is stored in advance, the vehicle control unit 44 performs optimal light distribution considering the vehicle or the pedestrian. Information is provided to the headlamp device controller 24 so as to form a pattern. Note that means for detecting an object for which irradiation by the vehicle headlamp device 10 should be suppressed in front of the vehicle can be changed as appropriate, and other detection means such as a millimeter wave radar or an infrared radar can be used instead of the camera 54. Also good. Moreover, you may combine them.

  Further, the vehicle control unit 44 can also acquire information from the steering sensor 56, the vehicle speed sensor 58, and the like that are normally mounted on the vehicle 42, and forms a light distribution pattern that is formed according to the traveling state and the traveling posture of the vehicle 42. You may make it select. For example, when the vehicle control unit 44 determines that the vehicle is turning based on information from the steering sensor 56, the left-side high or right-side high light distribution pattern is formed so as to improve the visibility in the turning direction. May be. Such a control mode can also be called a turning sensitive mode. Further, when traveling at high speed at night, it is preferable to perform illumination with a headlamp so that an oncoming vehicle, a leading vehicle, a road sign, and a message board approaching from a distance can be recognized as soon as possible. Therefore, the vehicle control unit 44 performs control based on information from the vehicle speed sensor 58 so as to form a high beam mode low beam light distribution pattern in which the shape of a part of the standard beam light distribution pattern is changed when traveling at high speed. May be. Such a control mode can be referred to as a speed sensitive mode.

  In addition, the vehicle control unit 44 can also acquire road shape information and form information, road sign installation information, and the like from the navigation system 60. By acquiring these pieces of information in advance, a light distribution pattern suitable for the traveling road can be formed smoothly. Such a control mode is called a navigation sensitive mode.

  An example of a shade shape used in the vehicle headlamp device 10 configured as described above is shown in FIG. 4, and a light distribution pattern formed by the shade is shown in FIG. FIG. 4A shows the shape of a ridge line portion that is an edge portion of the moving shade 34, and FIG. 5A shows a standard low beam light distribution pattern. As shown in FIG. 1, the projection lens 36 of the present embodiment is a plano-convex aspheric lens having a convex front surface and a flat rear surface. Projected on the virtual vertical screen in front of the vehicle as left and right inverted images. As shown in FIG. 5A, the standard low beam light distribution pattern is a light distribution pattern that is considered not to give glare to oncoming vehicles or pedestrians when passing on the left side.

  The shade shape after FIG.4 (b) is a shape of the ridgeline part formed on the outer peripheral surface of the rotation shade 32, and was extended in the axial direction. FIG. 4B is a right-side light distribution pattern for low beam, which is a shape of a ridge line portion forming a so-called “Dover low beam”, and FIG. 5B is a corresponding light distribution pattern for Dover low beam. FIG. 4C shows the shape of a ridge line portion for horizontal cut that forms a light distribution pattern immediately before the host vehicle, and FIG. 5C shows the corresponding light distribution pattern for horizontal cut. FIG. 4 (d) shows the shape of the ridge line portion for the left piece high that forms the left piece high light distribution pattern that irradiates the high beam region only on the own lane side, and FIG. 5 (d) shows the corresponding left piece high light distribution. It is a pattern. FIG. 4 (e) shows the shape of the ridge line portion for the right piece high that forms the right piece high light distribution pattern that irradiates the high beam region only on the opposite lane side, and FIG. 5 (e) shows the corresponding right piece high light distribution. It is a pattern.

  FIG. 4F shows the cross-sectional shape of the rotary shade 32. On the outer peripheral surface of the rotary shade 32, ridge lines are formed at intervals of, for example, 60 ° in the axial direction. For example, the ridge line portion of FIG. 4B is formed at the position indicated by reference numeral b, the ridge line portion of FIG. 4C is formed at the position indicated by reference numeral c, and the ridge line of FIG. 4D is formed at the position indicated by reference numeral d. Part is formed, and a ridge line part of FIG. Further, the rotary shade 32 has a notch portion f in which a part of the outer peripheral surface is notched. This notch f is the shape of the ridge line portion for the standard high beam light distribution pattern in which both the own lane and the opposite lane are the high beam regions, and FIG. 5 (f) shows the corresponding standard high beam light distribution pattern.

  As described above, when the solenoid 38 is in the non-controlled state, the rod 38a is in the retracted state as shown in FIG. 1, and the moving shade 34 is located at the advanced position, forming a standard low beam light distribution pattern. On the other hand, when the solenoid 38 is in the controlled state, the rod 38a is in the protruding state as shown in FIG. 2, the moving shade 34 is located at the retracted position, and the rotating shade 32 allows the light distribution pattern other than the standard low beam light distribution pattern to be displayed. Let it form. As is well known, the protrusion and storage control of the rod 38a of the solenoid 38 can be performed at high speed. Therefore, as shown in FIG. 1, when the movable shade 34 is in the advanced position, the solenoid 38 is turned on / off by controlling the rotation so that the notch f of the rotary shade 32 is positioned on the optical axis. By performing the control at a high speed, the vehicle headlamp device 10 can be put into a passing state. In addition, when an oncoming vehicle or a pedestrian is found at the time of forming the standard high beam light distribution pattern, it is possible to quickly shift to the standard low beam light distribution pattern, and to prevent glare reliably. Similarly, the transition from the standard low-beam light distribution pattern to the standard high-beam light distribution pattern is also possible quickly, and when the oncoming vehicle no longer exists, the driver's visibility can be quickly secured.

  The rotary shade 32 stops at its rotational position when the vehicle ignition is off. Therefore, it is desirable that the rotational drive control unit 50 perform priority return to the standard stop position where the notch f of the rotary shade 32 is located on the optical axis when the vehicle is started. By preferentially returning to the standard stop position when the vehicle is started, the rotation posture of the rotary shade 32 can be initialized. As a result, the reliability of the rotation control in the rotary shade 32 can be improved. In addition, a standard high beam light distribution pattern that is frequently used next to the standard low beam light distribution pattern can be prepared when the vehicle is started, and can be quickly switched to the standard high beam light distribution pattern. Moreover, it becomes possible to make it possible to pass when the vehicle is started, and the passing can be performed quickly.

  When the motor 40 becomes uncontrollable for some reason and the rotation control of the rotary shade 32 becomes impossible, the energization to the solenoid 38 is cut, the rod 38a is accommodated, and the moving shade 34 is moved quickly to the advanced position. be able to. That is, regardless of the rotation state of the rotary shade 32, the moving shade 34 can quickly shift to the fail safe mode in which the standard low beam light distribution pattern is formed. As a result, it is possible to reliably prevent glare from being given to oncoming vehicles and pedestrians due to poor control of the rotary shade 32. Even when the solenoid 38 becomes poorly controlled, the rod 38a is stored by the return spring inside the solenoid 38, so that the standard low beam light distribution pattern can be formed quickly. As a result, a fail-safe function when the solenoid 38 is poorly controlled can be realized.

  In addition, the rotary shade 32 can be rotated in a state where the moving shade 34 is in the advanced position by appropriately selecting the shape of the moving shade 34 and the type of forward / backward movement. Here, a case where a right-side high light distribution pattern is formed as the next light distribution pattern in a state where the standard low beam light distribution pattern is formed by the moving shade 34 will be considered. In this case, while the light of the bulb 28 is shielded by the moving shade 34, the rotary shade 32 can be rotated and the ridge line for the right piece high can be pre-rotated on the optical axis and positioned. As a result, switching from the standard low beam light distribution pattern to the right-side high light distribution pattern can be performed without producing another light distribution pattern. By realizing such switching, the driver can be prevented from feeling uncomfortable when switching the light distribution pattern. Moreover, it has the effect that it can suppress the flickering feeling at the time of light distribution pattern switching for a forward vehicle or a pedestrian.

  In the above-described embodiment, the example in which the moving shade 34 moves so as to cover the rotary shade 32 to form the standard low beam light distribution pattern has been described. However, if the state of forming the light distribution pattern for standard low beam and the state of forming the other light distribution pattern are switched, the shape of the moving shade 34 can be selected as appropriate, and the same effect as in the present embodiment can be obtained. Can do. For example, a plate-like shade may be used. Further, in the above-described embodiment, the example in which the moving shade 34 is switched between the standing posture and the tilting posture by the advance / retreat operation of the rod 38a of the solenoid 38 has been described. However, it is only necessary to be able to move the advance position where the standard low beam light distribution pattern is formed and the retreat position where the other light distribution patterns are shared, and the same effects as in the present embodiment can be obtained in other operations. For example, the vehicle may move in the vertical direction. Further, even if the state with the advance position and the state with the retreat position are formed in a pseudo manner with an optical shutter or the like, the same effect as in the present embodiment can be obtained.

  In the present embodiment, five types of light distribution patterns formed by the rotary shade 32 are shown as an example, but the number of light distribution patterns to be adopted can be appropriately selected as necessary. For example, a light distribution pattern similar to the standard low beam light distribution pattern may be formed with a light distribution pattern having a shape feature at both ends and a light distribution pattern having a shape feature portion at the center. Further, a light distribution pattern that irradiates the overhead sign region or a light distribution pattern including a highway mode may be formed.

  As described above, according to the vehicle headlamp device 10 of the present embodiment, the movable shade 34 that forms the light distribution pattern for the standard low beam that is considered not to give glare even in the configuration having the rotary shade 32 is a fail-safe function. Is provided. As a result, the vehicle headlamp device 10 including the rotary shade 32 with the fail-safe function can be easily configured. Moreover, since various light distribution patterns can be formed with the rotary shade 32, the multifunctional vehicle headlamp device 10 having a fail-safe function can be realized.

  The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added based on the knowledge of those skilled in the art. The configuration shown in each figure is for explaining an example, and any configuration that can achieve the same function can be changed as appropriate, and the same effect can be obtained.

It is a block diagram explaining schematic structure of the vehicle headlamp apparatus containing the lamp unit containing the movement shade and rotation shade of this embodiment, and is an explanation which shows the case where a movement shade exists in an advance position. It is a block diagram explaining schematic structure of the vehicle headlamp apparatus containing the lamp unit containing the movement shade and rotation shade of this embodiment, and is a description which shows the case where a movement shade exists in a retracted position. It is a functional block diagram explaining the structure of the headlamp apparatus control part of the vehicle headlamp apparatus of this embodiment, and the vehicle control part by the side of a vehicle. It is explanatory drawing which shows an example of the shade shape of this embodiment. It is explanatory drawing which shows the shape of the light distribution pattern formed with the shade shape of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Vehicle headlamp apparatus, 18 Lamp unit, 24 Headlamp apparatus control part, 28 Valve, 30 Reflector, 32 Rotation shade, 34 Movement shade, 36 Projection lens, 38 Solenoid, 40 Motor, 42 Vehicle, 44 Vehicle control Section, 46 power supply circuit, 48 solenoid control section, 50 rotation drive control section, 52 light switch, 54 camera.

Claims (5)

A light source capable of emitting light forward of the vehicle;
A movable shade that can move forward and backward with respect to the optical axis of the light source, blocks a part of the light from the light source at the advanced position to form a standard low beam light distribution pattern, and allows other light distribution patterns to be formed at the retracted position. When,
A plurality of light distribution patterns other than the standard low beam light distribution pattern can be formed, and a rotary shade that selectively forms any one of the plurality of light distribution patterns by rotational driving;
A mechanism for moving the moving shade forward and backward, a shade moving mechanism for preferentially moving the moving shade to the advanced position when not controlled;
A vehicle headlamp apparatus comprising:   The rotation shade includes a light distribution pattern for a standard high beam among the plurality of light distribution patterns, and a standard stop position of the rotation shade is a formation position of the light distribution pattern for the standard high beam. The vehicle headlamp device according to claim 1.   The vehicle headlamp device according to claim 2, wherein the rotary shade is preferentially returned to the standard stop position at least when the vehicle is started.   The said shade movement mechanism preferentially moves the said movement shade to the said advance position when rotation control of the said rotation shade becomes abnormal, The any one of Claims 1-3 characterized by the above-mentioned. Vehicle headlamp device.   5. The rotary shade is pre-rotated to a position where any one of the plurality of light distribution patterns is formed when the movable shade is at an advanced position. The vehicle headlamp device according to any one of the above.

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