JP4556943B2 - Vehicle headlamp device - Google Patents

Description

  The present invention is for a vehicle that can switch the light distribution emitted from the headlamp unit and can change the irradiation direction of the light emitted from the headlamp unit according to the traveling state of the vehicle. The present invention relates to a headlamp device (vehicle headlamp system).

  As in AFS (Adaptive Front Lighting System), for example, the light distribution emitted from the headlamp unit can be switched, and the irradiation direction of the light emitted from the headlamp unit according to the traveling state of the vehicle Conventionally, there is a vehicle headlamp device that can change the following (for example, Patent Document 1). Hereinafter, a conventional vehicle headlamp apparatus will be described. A conventional vehicle headlamp device includes a light distribution switching unit that switches a lamp light distribution between a main beam and a sub beam, a swivel unit that deflects the lamp irradiation direction, and a signal transmission path for these units. And a control means for controlling each means. In the conventional vehicle headlamp device, the light distribution switching means is operated based on the control of the control means, the irradiation light distribution of the lamp is switched between the main beam and the sub beam, and the swivel means is operated to operate the lamp. The irradiation direction is deflected in accordance with the traveling state of the vehicle.

  However, conventional vehicle headlamp measures are not provided with countermeasures against surges (surge current and surge voltage) generated in the light distribution switching means. For this reason, in the conventional vehicle headlamp device, when a surge occurs in the light distribution switching means, the control means and swivel means are affected by the surge. In particular, when an electronic device is used in the control means or swivel means, it is easily affected by a surge.

JP 2006-182100 A

  The problem to be solved by the present invention is that, in the conventional vehicle headlamp device described above, when a surge occurs in the light distribution switching means, the control means and swivel means are affected by the surge.

According to the present invention (the invention according to claim 1), a surge absorber is provided in the harness of the light distribution switching drive unit , the harness is bent in the vicinity where the surge absorber is provided, and the harness It is bent portion including a surge absorber that is fixed by fixing means, characterized in that.

  In the present invention (the invention according to claim 2), the surge absorber is a diode, and is electrically connected to the anode-side harness and the cathode-side harness, and in parallel with the light distribution switching drive unit. It is characterized by being arranged.

Furthermore, the present invention (the invention according to claim 3), bent portion including the surge absorber of the wafer harness are bundled by the bundling unit, characterized in that.

Furthermore, in the present invention (the invention according to claim 4 ), the light distribution switching drive unit is constituted by a solenoid, and the irradiation direction of the light emitted from the headlamp unit is changed in accordance with the traveling state of the vehicle. The swivel driving unit to be driven is composed of a stepping motor driven by the control of the control means.

In the vehicle headlamp device of the present invention (the invention according to claim 1), since the surge absorber is provided in the harness of the light distribution switching drive unit, even if a surge occurs in the light distribution switching drive unit, Surge is absorbed by the surge absorber. As a result, the vehicle headlamp device according to the present invention (the invention according to claim 1) is a swivel drive unit that changes the irradiation direction of light emitted from the headlamp unit in accordance with the traveling state of the vehicle, and The control means for controlling the swivel drive unit is not affected by the surge. Thereby, in the vehicle headlamp device of the present invention (the invention according to claim 1), the swivel drive unit and the control means can operate with high accuracy and reliability. Furthermore, in the vehicle headlamp device according to the present invention (the invention according to claim 1), since the bent portion including the surge absorber in the harness is fixed by the fixing means, the headlamp is adapted according to the traveling state of the vehicle. When the irradiation direction of light emitted from the lamp unit changes, the harness on the light distribution switching drive unit side moves, but the harness on the bent portion side including the surge absorber does not move. For this reason, the vehicle headlamp device of the present invention (the invention according to claim 1) can protect the surge absorber from an impact when the harness on the light distribution switching drive unit moves, and the durability of the surge absorber. Performance can be improved, and the follow-up change in the light irradiation direction of the headlamp unit can be sufficiently handled, and the follow-up change in the light irradiation direction of the headlamp unit is not affected. Moreover, in the vehicle headlamp device according to the present invention (the invention according to claim 1), the harness is bent in the vicinity where the surge absorber is provided, so that the harness on the light distribution switching drive unit side moves. Can be absorbed at the location where the harness is bent, and the harness provided with the surge absorber is not subjected to the above-mentioned impact and does not bend, thereby improving the durability of the surge absorber. Further improved.

  In addition, since the vehicle headlamp device of the present invention (the invention according to claim 2) uses a diode as a surge absorber, the effect of absorbing surge is great and the cost can be reduced. . In addition, in the vehicle headlamp device of the present invention (the invention according to claim 2), the surge absorber is simply and reliably electrically connected to the anode-side harness and the cathode-side harness of the light distribution switching drive unit. It can be done and the assembly workability is good.

Furthermore, in the vehicle headlamp device of the present invention (the invention according to claim 3 ), the bent portion including the surge absorber in the harness is bundled by the bundling means. The impact when moving can be absorbed at the place where the harness is bent. As a result, the vehicle headlamp device according to the present invention (the invention according to claim 3 ) is simple and inexpensive because the harness provided with the surge absorber is not subjected to the impact and is not bent. The durability of the surge absorber is further improved by the simple bundling means.

Furthermore, in the vehicle headlamp device according to the present invention (the invention according to claim 4 ), the surge absorber can reliably absorb the surge generated when the power distribution to the solenoid of the light distribution switching drive unit is cut off. Therefore, the electronic control (pulse control) and control means of the stepping motor of the swivel drive unit are not affected by the surge. As a result, the vehicle headlamp device of the present invention (the invention according to claim 4 ) can control the stepping motor of the swivel drive unit with high accuracy and reliability, and the control means has high accuracy. It can operate reliably.

  Hereinafter, two examples of embodiments of a vehicle headlamp device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  1 to 5 show Embodiment 1 of a vehicle headlamp device according to the present invention. Hereinafter, the configuration of the vehicle headlamp apparatus according to the first embodiment will be described. 1 and 2, reference numeral 1 denotes a vehicle headlamp device according to the first embodiment. The vehicle headlamp device 1 is mounted on the left and right of the front part of the automobile (vehicle), respectively. The vehicle headlamp device 1 includes a headlamp unit 2, a light distribution switching drive unit 3, a swivel drive unit 4, a surge absorber 5, a lamp housing (not shown), and a lamp lens (not shown). For example, a transparent outer lens).

  The headlamp unit 2, the light distribution switching drive unit 3, the swivel drive unit 4, and the surge absorber 5 are disposed in a lamp chamber (not shown) defined by the lamp housing and the lamp lens, for example. They are arranged via an optical axis adjusting mechanism (not shown) and / or a leveling device (not shown).

  The headlamp unit 2 is, for example, a projector type headlamp as shown in FIGS. The headlamp unit 2 includes a light source 6, a reflector 7, a projection lens (condensing lens, convex lens) 8, a shade 9, a spring member (not shown), a frame member 10, and a stopper 11. Are provided.

  In this example, the light source 6 uses a discharge lamp. The discharge lamp is a so-called high pressure metal vapor discharge lamp such as a metal halide lamp, a high intensity discharge lamp (HID), or the like. The light source 6 is detachably attached to the reflector 7 via a socket mechanism 12. The light source 6 may be a halogen bulb or an incandescent bulb other than the discharge lamp. The light source 6 includes a light emitting unit 13.

  The reflector 7 reflects light (not shown) from the light source 6 toward the projection lens 8. The reflector 7 is fixedly held on the rear side (the light source 6 side) of the frame member 10 together with the light distribution switching drive unit 3 and the stopper 11 by a screw 14 as a fixing member. The reflector 7 has a hollow concave shape that is open on the front side (light irradiation direction side of the vehicle headlamp 1) and closed on the rear side. A circular through hole 15 into which the light source 6 is inserted is provided in the center of the closing portion on the rear side of the reflector 7.

  A reflective surface 16 is formed on the inner concave surface of the reflector 7 by vapor deposition of aluminum or silver coating. The reflecting surface 16 of the reflector 7 is an ellipse or a reflecting surface based on an ellipse, for example, a rotating ellipsoid or a free-form surface (NURBS surface) based on an ellipse (the vertical cross-section of FIGS. 3 and 4). A reflecting surface having an elliptical surface and a horizontal cross section (not shown) forming a paraboloid or a deformed paraboloid). For this purpose, the reflecting surface 16 of the reflector 7 has a first focal point F1, a second focal point (focal line on the horizontal section) F2, and an optical axis ZZ. The optical axis ZZ of the reflector 7 and the optical axis (not shown) of the light source 6 substantially coincide.

  The free curved surface (NURBS curved surface) of the reflective surface 16 of the reflector 7 is a NURBS free curved surface (Non-Uniform Rational B-B) described in “Mathematical Elemennts for Computer Graphics” (Devid F. Rogers, J Alan Adams). Spline Surface). The first focal point F1 of the reflecting surface 16 of the reflector 7 is located at or near the light emitting unit 13 of the light source 6. The second focal point F2 of the reflecting surface 16 of the reflector 7 is located at or near the shade 9.

  The projection lens 8 projects reflected light (not shown) from the reflecting surface 16 of the reflector 7 in front of the vehicle. The projection lens 8 is an aspheric lens convex lens. The front side of the projection lens 8 forms a convex aspheric surface, while the rear side of the projection lens 8 forms a flat aspheric surface. The projection lens 8 is fixedly held on the front side of the frame member 10 by a rim 17 as a fixed annular member. The projection lens 8 has a lens focal point (a meridional image plane that is a focal plane on the object space side) and an optical axis (not shown). The focal point of the projection lens 8 and the second focal point F2 of the reflecting surface 16 are substantially coincident with each other or are located close to each other. The optical axis of the projection lens 8 and the optical axis ZZ of the reflecting surface 16 are substantially coincident. Note that the optical axis of the projection lens 8 and the optical axis ZZ of the reflecting surface 16 may be shifted from side to side.

The shade 9 converts reflected light from the reflecting surface 16 of the reflector 7 toward the projection lens 8 into a plurality of light distribution patterns, for example, a passing light distribution pattern (not shown) and a traveling light distribution pattern (see FIG. a plurality of beams Shimese not) and can be obtained, i.e., one in which switching is the low beam (not shown) and high beam (not shown). The shade 9 has a plate structure (in this example, a flat thin steel plate structure) that is inexpensive to manufacture. The shade 9 and the spring member form an integral structure.

  The spring member and the light distribution switching drive unit 3 have a plurality of postures in which the low beam and the high beam can be obtained between the posture of the shade 9 between the obliquely upper rear and the obliquely lower forward posture, that is, the low beam. Switching between the posture and the high beam posture. The low beam posture is an obliquely upper and backward posture (position) shown in FIG. 3, and the high beam posture is an obliquely lower forward posture (position) shown in FIG.

  The light distribution switching drive unit 3 is composed of a solenoid. The solenoid 3 includes a main body 18 and an advance / retreat rod (plunger) 19 that advances and retreats with respect to the main body. The main body 18 accommodates a yoke (not shown) and a coil (not shown) made of a material having high thermal conductivity such as metal.

  The solenoid 3 is housed in the space of the dome of the spring member. The solenoid 3 is sandwiched and attached between the reflector 7 and the frame member 10 by a screw 14 as a fixing member. As a result, the solenoid 3 is fixedly held by the reflector 7 and the frame member 10. At this time, as shown in FIGS. 3 and 4, the solenoid 3 is arranged so that the main body 18 is positioned obliquely downward and forward on the opposite side of the light source 6 with respect to the advance / retreat rod 19 and the shade 9. Has been. Then, when the headlamp unit 2 is assembled, the integrally structured shade 9 and the spring member are permanently fixed to the solenoid 3.

  The stopper 11 is held and fixed to the frame member 10 together with the reflector 7 by a screw 14 as a fixing member. The stopper 11 restricts and brakes the posture of the shade 9 to the low beam posture. That is, as shown in FIG. 3, when the solenoid 3 is not driven (non-energized), the stopper 11 is elastically brought into contact with the shade 9 by the spring force of the spring member. Is controlled and braked in the horizontal and vertical directions.

  The solenoid 3 is provided with a connector portion 20. A connector 21 on the power source side is detachably connected to the connector portion 20. Two harnesses, that is, an anode side harness 22 and a cathode side harness 23 are connected to the power source side connector 21. The harnesses 22 and 23 are connected to a power source (not shown).

  The surge absorber 5 is a diode in this example. The diodes 5 are electrically connected to the anode-side harness 22 and the cathode-side harness 23, respectively, and are arranged in parallel with the solenoid 3 (see FIG. 5).

  The harnesses 22 and 23 are bent in the vicinity where the diode 5 is provided, and a bent portion of the harnesses 22 and 23 including the diode 5 is fixed to the lamp housing by fixing means 24. ing.

  The fixing means 24 is a fixing clip in this example. The fixing clip 24 is made of, for example, an insulating member or an elastic member. A circular mounting hole (not shown) is provided at one end of the fixing clip 24. The other end of the fixing clip 24 is provided with an opening (not shown) through which the harnesses 22 and 23 are passed. The two harness cords 22, 23 are passed through the opening of the fixing clip 24, and the fixing clip 24 is fixed to the lamp housing with a screw 25 through an attachment hole.

  On the upper surface and the lower surface of the frame member 10 of the headlamp unit 2, a rotation shaft 26 is integrally provided in the vertical axis or substantially vertical axis V direction. On the other hand, the swivel drive unit 4 is provided with a holder member 27 so as to straddle the headlamp unit 2 from the side. The rotating shaft 26 of the headlamp unit 2 is rotatably held by the swivel drive unit 4 and the holder member 27 via a bearing 28 or the like.

  The swivel drive unit 4 changes the irradiation direction of the light emitted from the headlamp unit 2 in accordance with the traveling state of the vehicle, and is driven by the control of a control means (not shown). It consists of a motor. A rotational force transmission mechanism (not shown) is provided between the stepping motor 4 and the rotating shaft of the headlamp unit 2. As a result, when the stepping motor 4 is driven under the control of the control means, the headlamp unit 2 rotates left and right about the vertical axis or substantially the vertical axis V.

  That is, a detection means is connected to the control means. The detection means detects a change in the running condition of the vehicle and outputs a detection signal to the control means. The control means outputs a pulse signal (control signal) for controlling the driving of the stepping motor 4 to the stepping motor 4 based on a detection signal from the detection means. The stepping motor 4 is driven based on a pulse signal from the control means. As a result, the headlamp unit 2 rotates left and right around the vertical axis or substantially the vertical axis V.

  The vehicle headlamp apparatus according to the first embodiment is configured as described above. Hereinafter, the operation of the vehicle headlamp apparatus according to the first embodiment will be described.

  First, the light source 6 is turned on. Then, light is emitted from the light emitting unit 13 of the light source 6. This light is reflected by the reflecting surface 16 of the reflector 7 toward the shade 9 and the projection lens 8. At this time, when the solenoid 3 is not driven, that is, in a non-energized state, the advance / retreat rod 19 of the solenoid 3 moves forward and the shade 9 is urged in the direction of the solid arrow in FIG. And the shade 9 is in elastic contact with the stopper 11. As a result, the shade 9 is regulated and braked in two directions different from the switching direction of the posture of the shade 9, that is, the horizontal direction and the vertical direction. Thereby, the shade 9 is in the low beam posture shown in FIG.

  When the shade 9 is in the low beam posture shown in FIG. 3, a part of the reflected light from the reflecting surface 16 of the reflector 7, that is, reflected light mainly from the lower surface side of the reflecting surface 16 of the reflector 7 (mainly traveling) Reflected light forming the light distribution pattern for use) is shielded by the shade 9. On the other hand, the remaining reflected light travels to the projection lens 8 side, and is projected (radiated and irradiated) to the front of the automobile as a passing light distribution pattern through the projection lens 8.

  Here, when the solenoid 3 is energized, the solenoid 3 is driven, and the advance / retreat rod 19 of the solenoid 3 moves backward against the spring force of the spring member. Along with this, the shade 9 moves in the direction of the solid line arrow in FIG. That is, the shade 9 is switched from the diagonally upper rear position shown in FIG. 3, that is, the low beam attitude, to the diagonally lower forward position shown in FIG. 4, that is, the high beam attitude.

  Then, the reflected light mainly from the lower surface side of the reflecting surface 16 of the reflector 7 that has been shielded by the shade 9 until now together with the reflected light mainly from the upper surface side of the reflecting surface 16 of the reflector 7 is on the projection lens 8 side. Then, the light is projected (radiated and irradiated) in front of the automobile as a traveling light distribution pattern through the projection lens 8.

  When the energization of the solenoid 3 is cut off, the solenoid 3 is brought into a non-driven state, so that the elastically deformed spring member is elastically returned to the spring force. As a result, the shade 9 is moved and switched from the high beam posture shown in FIG. 4 to the low beam posture shown in FIG. As a result, the traveling light distribution pattern HP is switched to the passing light distribution pattern.

When the energization to the solenoid 3 is cut off, a counter electromotive force is generated in the coil of the solenoid 3. This back electromotive force is absorbed by short-circuiting through the diode 3 arranged in parallel via the solenoid 3 and the two harnesses 22 and 23. Thereby, generation | occurrence | production of a surge is suppressed.

  The surge absorbing action will be described with reference to FIG. In the DC circuit in FIG. 5, a diode D is arranged in parallel with the relay RY. Then, when the switch SW is turned off, the back electromotive force generated in the coil of the relay RY is absorbed by being short-circuited through the diode D, so that the occurrence of a surge can be suppressed. In addition, the code | symbol B in FIG. 5 is DC power supply.

  Further, when the traveling state of the vehicle changes, for example, when the vehicle bends, the detection unit detects a change in the traveling state of the vehicle and outputs a detection signal to the control unit. The control means outputs a pulse signal to the stepping motor 4 based on the detection signal from the detection means. The stepping motor 4 is driven based on a pulse signal from the control means. As a result, the headlamp unit 2 rotates to the left or right about the vertical axis or substantially the vertical axis V, and the irradiation direction (optical axis ZZ) of the light emitted from the headlamp unit 2 is changed to the traveling state of the vehicle. Corresponding changes change from side to side accordingly.

  When the headlamp unit 2 rotates to the left or right around the vertical axis or substantially the vertical axis V, the portion on the headlamp unit 2 side of the harnesses 22 and 23 is as shown by the two-dot chain line in FIG. It moves as the headlamp unit 2 rotates. On the other hand, the portion of the harnesses 22 and 23 that is fixed by the fixing clip 24, that is, the bent portion including the diode 5, does not move even if the headlamp unit 2 rotates as shown in FIG. .

  The vehicle headlamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicle headlamp device 1 according to the first embodiment, since the diode 5 is provided in the harnesses 22 and 23 of the solenoid 3, even if a surge occurs in the solenoid 3, the surge is absorbed by the diode 5. The As a result, the vehicle headlamp device 1 according to the first embodiment includes the stepping motor 4 that changes the irradiation direction of the light emitted from the headlamp unit 2 according to the traveling state of the vehicle, and the stepping motor 4 thereof. The control means for controlling the motor 4 is not affected by the surge. Thereby, in the vehicle headlamp device 1 according to the first embodiment, the stepping motor 4 and the control means can operate with high accuracy and reliability.

  Moreover, since the vehicle headlamp device 1 according to the first embodiment uses the diode 5 as a surge absorber, the effect of absorbing the surge is great, and the cost can be reduced. Moreover, the vehicle headlamp device 1 according to the first embodiment can easily and reliably electrically connect the diode 5 to the anode-side harness 22 and the cathode-side harness 23 of the solenoid 3, Good assembly workability.

  Further, in the vehicular headlamp device 1 according to the first embodiment, the bent portions including the diodes 5 of the harnesses 22 and 23 are fixed by the fixing clip 24, so that the headlamps according to the traveling state of the vehicle. The harnesses 22 and 23 on the solenoid 3 side move when the lamp unit 2 rotates left and right around the vertical axis or substantially the vertical axis V and the irradiation direction of the light irradiated from the headlamp unit 2 changes. The harnesses 22 and 23 on the bent portion side including the diode 5 do not move. For this reason, the vehicle headlamp device 1 according to the first embodiment can protect the diode 5 from an impact when the harnesses 22 and 23 on the solenoid 3 side move, and improve the durability of the diode 5. And can sufficiently cope with the rotation of the headlamp unit 2, that is, the follow-up change in the light irradiation direction of the headlamp unit 2. There is no giving.

  Moreover, in the vehicular headlamp apparatus 1 according to the first embodiment, the harnesses 22 and 23 are bent in the vicinity where the diode 5 is provided, so that the harnesses 22 and 23 on the solenoid 3 side are moved. The impact can be absorbed at the place where the harnesses 22 and 23 are bent, and the harnesses 22 and 23 provided with the diode 5 are not subjected to the above-described impact and are not bent. The durability of 5 is further improved.

  Furthermore, in the vehicle headlamp device 1 according to the first embodiment, the diode 5 can surely absorb the surge generated when the energization to the solenoid 3 is cut off, so that the electronic control of the stepping motor 4 is possible. (Pulse control) and control means are not affected by surge. Thereby, the vehicular headlamp apparatus 1 according to the first embodiment can control the stepping motor 4 with high accuracy and reliability, and the control means can operate with high accuracy and reliability. .

  FIG. 6 shows Embodiment 2 of the vehicle headlamp device according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 5 denote the same components. Hereinafter, the vehicle headlamp apparatus according to the second embodiment will be described.

  In the vehicle headlamp device according to the second embodiment, the harnesses 22 and 23 are bent in the vicinity where the diodes 5 are provided, and the harnesses 22 and 23 include the diodes 5. The portions are bound by a binding means, that is, a protective tape 29. The protective tape 29 is, for example, insulative. In FIG. 6, the harnesses 22, 23, and the harnesses 22, 23 that are bound by the protective tape 29, and the harnesses 25, 23, and the diode 5 are easily bound to the protective tape 29. The diode 5 is shown.

  In the vehicle headlamp device according to the second embodiment, the bent portions including the diodes 5 of the harnesses 22 and 23 are bundled by the protective tape 29, and therefore the harnesses 22 and 23 on the solenoid 3 side are moved. The impact can be absorbed at the place where the harnesses 22 and 23 are bent. As a result, the vehicular headlamp apparatus according to the second embodiment is substantially the same as the vehicular headlamp apparatus 1 according to the first embodiment. Since it does not receive an impact and does not bend, the durability of the diode 5 is further improved by the simple and inexpensive protective tape 29.

  Hereinafter, examples other than the first and second embodiments will be described. In the first and second embodiments, the passing light distribution pattern and the traveling light distribution pattern are obtained as the switched light distribution. However, in the present invention, the light distribution to be switched includes, for example, a highway light distribution pattern, a rain light distribution pattern, and a fog light distribution pattern in addition to the passing light distribution pattern and the traveling light distribution pattern. Alternatively, the three light distribution patterns may be switched.

  In the first embodiment, the bent portions of the harnesses 22 and 23 are fixed by the fixing clip 24 of the fixing means. In the second embodiment, the harness 22 is protected by the protective tape 29 of the binding means. , 23 bent portions. However, in the present invention, the bent portions of the harnesses 22 and 23 may be fixed by the fixing clip 24 of the fixing means and may be bound by the protective tape 29 of the binding means.

  Further, in the first and second embodiments, for example, when the vehicle bends, the headlamp unit 2 rotates left and right around the vertical axis or substantially the vertical axis V by the operation of the control means and the stepping motor 4. The irradiation direction (optical axis ZZ) of the light irradiated from the lighting unit 2 follows the left and right according to the traveling state of the vehicle. However, in the present invention, for example, when the vehicle attitude, that is, the height difference of the vehicle changes due to changes in the vehicle speed or the load capacity, the headlamp unit 2 is rotated about the horizontal axis or substantially the horizontal axis by the operation of the control means and the auto leveling drive unit. The light irradiation direction (optical axis ZZ) emitted from the headlamp unit 2 may be changed up and down in accordance with the traveling state of the vehicle. A combination of left and right follow-up changes and up-and-down follow-up changes may be used.

  Furthermore, in the said Example 1, 2, the diode 5 is used as a surge absorber. However, in the present invention, a surge absorber other than the diode 5, for example, a combination of a capacitor, a resistor and a diode, or a discharge gap type (discharge tube type) may be used.

  Furthermore, in the first and second embodiments, the harnesses 22 and 23 are bent in the vicinity where the diode 5 is provided. However, in the present invention, the harness may be fixed without being bent by a fixing means such as a fixing clip, or may be bound by a binding means such as a protective tape.

It is a top view which shows Example 1 of the vehicle headlamp apparatus concerning this invention. Similarly, it is a side view showing a vehicle headlamp device. Similarly, it is a longitudinal sectional view showing a state where the solenoid is in a non-energized state and the shade is in a low beam posture. Similarly, it is a longitudinal sectional view showing a state where the solenoid is energized and the shade is in a high beam posture. Similarly, it is explanatory drawing which shows the effect | action of the diode of a surge absorber. It is explanatory drawing which shows a part of harness and protective tape which show Example 2 of the vehicle headlamp apparatus concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp apparatus 2 Headlamp unit 3 Solenoid (light distribution switching drive unit)
4 Stepping motor (swivel drive unit)
5 Diode (surge absorber)
6 Light source 7 Reflector 8 Projection lens 9 Shade 10 Frame member 11 Stopper 12 Socket mechanism 13 Light emitting part 14 Screw 15 Through hole 16 Reflecting surface 17 Rim 18 Body 19 Retracting rod 20 Connector part 21 Power supply side connector 22 Anode side harness 23 Cathode side Harness 24 fixing clip (fixing means)
25 Screw 26 Rotating shaft 27 Holder 28 Bearing etc. 29 Protective tape (Bundling means)
V Vertical axis or almost vertical axis ZZ Optical axis F1 First focus F2 Second focus

Claims (4)

A vehicle headlamp device that can switch the light distribution emitted from the headlamp unit and can change the irradiation direction of the light emitted from the headlamp unit according to the traveling state of the vehicle. In
A light distribution switching drive unit that switches light distribution emitted from the headlight unit;
A surge absorber provided in a harness of the light distribution switching drive unit;
Equipped with a,
The harness is bent in the vicinity where the surge absorber is provided, and a bent portion including the surge absorber in the harness is fixed by a fixing means.
A vehicle headlamp apparatus characterized by the above. The surge absorber is a diode, and is electrically connected to the harness on the anode side and the harness on the cathode side, and is arranged in parallel with the light distribution switching drive unit.
The vehicle headlamp device according to claim 1. Bent portion including the surge absorber of the prior SL harness is bundled by the bundling means,
The vehicle headlamp device according to claim 1 or 2 , wherein The light distribution switching drive unit is composed of a solenoid,
The swivel drive unit that changes the irradiation direction of the light emitted from the headlamp unit according to the traveling state of the vehicle is composed of a stepping motor that is driven by the control of the control means.
The vehicular headlamp apparatus according to any one of claims 1 to 3 .

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