JP4305258B2 - Vehicle headlamp unit - Google Patents

Description

  The present invention relates to a vehicular headlamp unit that uses an LED (light emitting diode) as a light source, which can be configured as a headlamp by assembling one or a plurality of lamp lamps into a lamp housing.

  FIG. 7 shows this type of vehicle headlamp unit 100 (see, for example, Patent Document 1). This vehicle headlamp unit 100 eliminates the fact that the LED as the light source looks like a spot with high brightness and that the reflecting surface does not shine neatly and that it is difficult to form a large light emitting surface. For this purpose, the LED 1 mounted on the printed circuit board 104, the first reflecting member 101 arranged so as to surround the front of the LED 1, and the first reflecting member 101 are arranged opposite to each other. The second reflecting member 102 and a light distribution control lens 103 disposed in front of the second reflecting member 102 are configured. The reflective film 101a of the first reflective member 101 is shifted from the first focal position F1 located in the vicinity of the light emitting portion 1a of the LED 1 and the optical axis Z, and in the illustrated case, the reflective film 101a is located obliquely forward from the light emitting portion 1a of the LED 1. And two focal positions F2. In FIG. 7B, reference numeral 105 denotes a cover made of a translucent material.

According to the vehicle headlamp unit 100, when the LED 1 is turned on, the light is reflected by the reflecting film 101a of the first reflecting member 101, and is converged toward the second focal position F2, and the second focal point. The light focused at the position F2 is then reflected by the reflective film 102a of the second reflective member 102, and travels forward as a parallel light flux. The collimated light beam is incident on the light distribution control lens 103 and is irradiated and light distribution is controlled to be irradiated forward, thereby achieving the original purpose. . In FIG. 7A, the light emitting portion is indicated by hatching.
JP 2003-229006 A

  However, the vehicle headlamp unit 100 has a problem that the obtained light distribution pattern does not have a cut line, and therefore lacks suitability as a vehicle headlamp.

  In addition, the vehicular headlamp unit 100 has a problem that it lacks multiple functions because it shows only one type of light distribution pattern.

  Furthermore, since the vehicle headlamp unit 100 uses the light distribution control lens 103, there is a tendency that the length in the optical axis direction tends to be long, and it is difficult to make the entire lamp compact. is doing.

  Accordingly, an object of the present invention is to provide a vehicular headlamp unit that can be provided with adaptability and multi-function as a vehicular headlamp and that can make the entire lamp compact.

In order to achieve the above-described object, the invention according to claim 1 is configured such that a first reflecting surface formed as a spheroidal curved surface or a free-form surface based on a rotating ellipse, and a light emitting portion face the first reflecting surface. An LED disposed in the vicinity of the first focal position, a second reflecting surface that receives light reflected by the first reflecting surface of the LED and reflects it forward of the lamp, and the first reflecting surface; A vehicular headlamp unit including a shade mechanism provided between the second reflecting surface and a shield mechanism capable of shielding a part of the reflected light of the first reflecting surface ;
The shade mechanism includes a first shade having a stepped upper end similar to a cut line of a light distribution pattern, which is switched in the vicinity of the second focal position of the first reflecting surface, and a cut line of another light distribution pattern. is constructed and a second shade having a horizontal upper portion forming a,
The first shade is formed in a long plate-like body by providing a plurality of stepped upper ends so as to fit a plurality of vehicle headlamp units arranged in parallel, and the second shade is It is formed in a long plate-like body corresponding to the length of the first shade, and one of the first shade and the second shade is fixedly provided, and the other is one drive. The plate-like body is provided so as to appear and disappear by translating the plate-like body with respect to the one.

  Therefore, in the first aspect of the present invention, the emitted light from the light emitting portion of the LED is emitted toward the first reflecting surface and reflected by the first reflecting surface to reach the second focal position of the first reflecting surface. At this second focal position, a part of the reflected light is shielded by the shade mechanism, and the remaining reflected light reaches the second reflecting surface, and is then reflected by the second reflecting surface and emitted directly in front of the lamp.

  At this time, when the shade of the shade mechanism is the first shade, the light distribution pattern has a cut line suitable as a passing beam, and when the shade is the second shade, the cut line is suitable as a high beam or a light distribution for high-speed traveling. A light distribution pattern having Thus, the light distribution pattern can be switched by switching the shade of the shade mechanism.

In addition, the vehicle headlamp unit converges the reflected light of the first reflecting surface once and then reflects it on the second reflecting surface to convert it into diffused light, and is reflected on the second reflecting surface. Since the diffused light is emitted as it is without passing through the lens and the optical path required for the lens is made unnecessary, the entire configuration can be made with a shortened length in the optical axis direction. Moreover, the switching of the light distribution pattern of the plurality of vehicle headlamp units arranged in parallel can be simultaneously performed by one driving means.

The invention according to claim 2 is the vehicle headlamp unit according to claim 1,
One of the first shade and the second shade is provided so as to be able to project and retreat with respect to the other, and one of the first shade and the second shade is protruded from the other so as to shield part of the reflected light on the first reflection surface. In addition, the other is protruded from one side, and a part of the reflected light of the first reflecting surface is shielded by the other.

  For this reason, in the invention according to claim 2, since one of the first shade and the second shade is provided so as to be able to appear and retract with respect to the other, the first shade projects beyond the second shade, A light distribution pattern having a cut line suitable as a passing beam is obtained, and the light distribution pattern having a cut line suitable as a high beam or high-speed light distribution is obtained by projecting the second shade beyond the first shade. can get.

  According to the first aspect of the present invention, it is possible to switch between a light distribution pattern having a cut line suitable as a passing beam and a light distribution pattern having a cut line suitable as a high beam or light distribution for high-speed traveling. A vehicle headlamp unit having compatibility as a vehicle headlamp and having multiple functions can be provided.

In addition, according to the first aspect of the present invention, the reflected light from the first reflecting surface is once converged and then converted to diffused light, and the diffused light reflected from the second reflecting surface is converted into a lens. By eliminating the need for the optical path required for the lens without passing through the lens, it is possible to shorten the length in the optical axis direction and to configure the entire unit, thereby reducing the size of the entire unit. In addition, since the light distribution pattern of a plurality of vehicle headlamp units arranged in parallel is switched by a single driving means, a vehicle headlamp unit that is simpler and easier to assemble is provided. can do.

  Further, according to the invention described in claim 2, since the shade mechanism is configured by providing one of the first shade and the second shade so as to be able to project and retract, the effect of the invention of claim 1 is added. Thus, it is possible to provide a vehicle headlamp unit that is simple in configuration and easy to assemble.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the component which has the same function as what was disclosed in FIG. 7 is attached | subjected and demonstrated with the same code | symbol.

  FIG. 1 shows a vehicle headlamp A configured by assembling a plurality of vehicle headlamp units 10 according to a first embodiment of the present invention. This vehicular headlamp A has a main light source section composed of three vehicular headlamp units 10 and an auxiliary light source section composed of a clearance lamp 11 and a front turn lamp 12. Yes. The main light source part and the auxiliary light source part are provided in the lamp housing 13 whose front part is opened, and the front opening part of the lamp housing 13 is covered with the transparent glass 14. The three vehicle headlamp units 10 are assembled to the lamp housing 13 so that the optical axis can be adjusted via an appropriate fixture (not shown) having a pivot structure, an aiming screw, and the like.

  2 and 3 show the vehicle headlamp unit 10. This vehicle headlamp unit 10 has a first reflecting surface 2 formed as a spheroidal curved surface or a free curved surface based on a rotating ellipse, and a light emitting portion 1a facing the first reflecting surface 2 and its first focal point. LED 1 arranged in the vicinity of position F1, second reflecting surface 3 that receives light L1 reflected by first reflecting surface 2 of light L of LED 1 and reflects it forward of the lamp, first reflecting surface 2, and first reflecting surface 2 Between the two reflecting surfaces 3, a shade mechanism 4 provided so as to shield a part of the reflected light L1 of the first reflecting surface 2 is provided.

  The shade mechanism 4 has a stepped upper end 5a having a shape similar to the cut line CL of the light distribution pattern LP1 (see FIG. 5A), which switches in the vicinity of the second focal position F2 of the first reflecting surface 2. 1 shade 5 and the 2nd shade 6 which has the horizontal upper end part 6a which forms the cut line FL of other light distribution pattern LP2 (refer FIG.5 (b)) are comprised.

  In the present embodiment, as shown in FIG. 3, the first reflecting surface 2 is made of a thermoplastic resin material such as polycarbonate, and the inner portion is a part of a free-form surface based on a spheroidal curved surface or a rotational ellipse. It is the 1st reflection member 15 formed as a concave surface of a semicircular cross section, Comprising: The concave surface of this 1st reflection member 15 is formed by performing reflection processes, such as aluminum vapor deposition.

  The first reflecting member 15 is formed by being cut halfway so that the upper end of the first reflecting member 15 does not interfere with the diffused light L2 reflected by the second reflecting surface 3, and the lower end of the first reflecting member 15 extends from the bottom plate 16 to which the LED 1 is assembled. The whole structure.

  Further, as shown in FIG. 4, the LED 1 is fixed to the mounting plate 9 and is sub-assembled. By coupling the mounting plate 9 to the bottom plate 16 with screws 24, the light emitting portion 1 a is moved to the first focal position F <b> 1. It is attached to the first reflecting surface 2 while being positioned. In FIG. 4, reference numeral 25 denotes four lead wires, two of which are the lead wires of the LED 1 and the other two are for the cooling element.

  Further, as shown in FIG. 3, the second reflecting surface 3 is formed while maintaining a positional relationship facing the reflecting surface 2 at an oblique upper position. That is, the second reflecting surface 3 is a second reflecting member 17 formed as a concave surface having a semicircular cross section whose inner portion is a part of a free-form surface using a thermoplastic resin material such as polycarbonate. 2 The concave surface of the reflecting member 17 is formed by performing a reflection process such as aluminum vapor deposition.

  The second reflecting member 17 has a height in the vertical direction that is sufficiently higher than that of the first reflecting member 15, and the second reflecting surface 3 formed on the entire inner surface of the second reflecting member 17 reflects light reflected by the first reflecting surface 2. The remaining light of L2 and LED1 can be irradiated to the front of the lamp A without any leakage. The second reflecting member 17 is erected with its lower end fixed to the bottom plate 16.

  The shade mechanism 4 is positioned so that the stepped upper end 5a of the first shade 5 and the horizontal upper end 6a of the LED 1 of the second shade 6 are switched in the vicinity of the second focal position F2 of the first reflecting surface 2. And it is provided in the baseplate 16 between the adhering site | part of LED1 and the lower end part of the 2nd reflection member 17. FIG.

  The vehicle headlamp unit 10 is configured as described above, and the outer surface of the first reflecting member 15 and the second reflecting surface 3 are disposed so as to face the transparent glass 14 and assembled in the lamp housing 13. Thus, the vehicle headlamp A can be configured. In the vehicle headlamp A, the three vehicle headlamp units 10 are arranged and incorporated so as to be positioned at the vertices of the equilateral triangle.

  According to the vehicle headlamp unit 10, the emitted light L from the light emitting portion 1 a of the LED 1 is emitted toward the first reflecting surface 2 and reflected (reflected light L1) by the first reflecting surface 2. The light is focused on the second focal position F2 of the first reflecting surface 2, and a part of the reflected light L1 is shielded by the shade mechanism 4 at the second focal position F2, so that the remaining reflected light L1 reaches the second reflecting surface 3. Thereafter, the light is reflected by the second reflecting surface 3 and is emitted as it is to the front of the lamp A as diffused light L2.

  At this time, when the shade of the shade mechanism 4 is the first shade 5, the light distribution pattern LP1 (see the shaded portion in FIG. 5A) having a cut line CL suitable as a passing beam is obtained, which is the second shade 6. In some cases, the light distribution pattern LP2 (see the shaded portion in FIG. 5B) having a cut line FL suitable as a light distribution for high beam or high-speed traveling. Thus, by switching the shade 5/6 of the shade mechanism 4, the light distribution pattern LP1 / LP2 can be switched.

  Further, the vehicle headlamp unit 10 converges the reflected light L1 of the first reflecting surface 2 once, then reflects the reflected light L2 on the second reflecting surface 3, and converts it into the diffused light L2, and the second reflected light. The diffused light L2 reflected by the surface 3 is emitted as it is without passing through the lens, and the optical path required for the lens is made unnecessary, thereby shortening the length in the direction of the optical axis Z (see FIG. 3) and configuring the whole. Can do.

  Preferably, one of the first shade 5 and the second shade 6 is provided such that one of the first shade 5 and the second shade 6 can be projected and retracted with respect to the other. And the other is protruded from one side, and a part of the reflected light L1 of the first reflecting surface 2 is shielded by the other.

  In the present embodiment, the shade mechanism 4 includes a U-shaped cross-section guide case 7 fixedly provided on the bottom plate 16 and a plate that is guided by the guide case 7 and reciprocates (indicated by an arrow a in FIG. 3). The first shade 5 formed as a shape and a solenoid 8 that activates the reciprocating motion of the first shade 5, and the upper portion of the guide wall on the LED1 side of the guide case 7 is a horizontal upper end 6a. The 2nd shade 6 which has these is comprised. In this way, the second shade 6 is fixedly provided, and the first shade 5 is provided so as to be able to appear and retract with respect to the second shade 6.

  In this configuration, the first shade 5 protrudes from the second shade 6 to obtain the light distribution pattern LP1 (the shaded portion in FIG. 5A) having a cut line CL suitable as a passing beam, while the first shade 5 The light distribution pattern LP2 having a cut line FL suitable as a light distribution for high beam or high-speed traveling (an oblique line in FIG. 5B) is obtained when the two shades 6 protrude from the first shade 5 by the immersion of the first shade 5. Part) is obtained.

  FIG. 6 shows a vehicle headlamp B configured by assembling a vehicle headlamp unit 20 as a second embodiment of the present invention. This vehicle headlamp B is the same as the vehicle headlamp A except for the difference that the main light source portion is configured by the vehicle headlamp unit 20.

  Further, the vehicle headlamp unit 20 is different from each other only in that the three vehicle headlamp units 10a, 10b, and 10c are connected in parallel via the shade mechanism 4. The configuration of 10a, 10b, 10c is the same as that of the vehicle headlamp unit 10 described above.

  That is, in the shade mechanism 4 in the vehicle headlamp unit 20, the three stepped upper end portions 21a are adapted so that the first shade 21 fits the three vehicle headlamp units 10a, 10b, and 10c arranged in parallel. , 21b, 21c are formed as long plate-like bodies, the second shade 22 is formed into a long plate-like body corresponding to the length of the first shade 21, and One of the first shade 21 and the second shade 22 is fixedly provided, and the other is provided so as to appear and disappear with respect to the one by one driving means.

  In the shade mechanism 4 of the present embodiment, the guide case 7 of the vehicle headlamp unit 10 is formed in an elongated shape over the three vehicle headlamp units 10a, 10b, and 10c, and the second shade 22 is formed. However, like the vehicle headlamp unit 10, it is fixedly formed as an upper portion of the guide wall having the horizontal upper end 22a, and the first shade 21 is connected to one vehicle headlamp unit 10 and Similarly, it is provided so as to be able to appear and retract with respect to the second shade 22 by using one driving means (not shown, refer to the solenoid 8 in FIG. 3).

  The vehicular headlamp unit 20 configured as described above can simultaneously switch the light distribution pattern of the three vehicular headlamp units 10a, 10b, and 10c arranged in parallel by a single driving unit.

  That is, the vehicular headlamp unit 20 has a light distribution pattern LP1 having a cut line CL suitable as a passing beam as the first shade 21 protrudes from the second shade 22 (shaded portion in FIG. 5A). On the other hand, the second shade 22 protrudes from the first shade 21 due to the immersion of the first shade 21, whereby a light distribution pattern LP2 having a cut line FL suitable as a light distribution for high beam or high-speed traveling (FIG. 5 (b)).

  In addition, the present invention is not limited to the above-described embodiment, and of course includes the following modifications.

  That is, the first shade may be fixedly provided, and the second shade may be provided so as to be able to appear and retract with respect to the first shade, or the first shade and the second shade may be provided so as to move relative to each other. .

It is a front view of the vehicle headlamp to which the vehicle headlamp unit as the first embodiment of the present invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS It is a vehicle headlamp unit as 1st Embodiment of this invention, (a) is a front view, (b) is the perspective view which filled in the optical path. FIG. 2 is a schematic partial cross-sectional view in which a fixture for the vehicle headlamp of FIG. 1 is omitted. It is a perspective view of the sub-assembly of LED applied to the light source of the vehicle headlamp unit as 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a graph which shows the light distribution pattern of the vehicle headlamp unit as 1st Embodiment of this invention, (a) is a light distribution pattern which has a suitable cut line as a passing beam, (b) is for high beam or high-speed driving | running | working. The light distribution pattern which has a suitable cut line as light distribution of this is shown. It is a front view of the vehicle headlamp which applied the vehicle headlamp unit as 2nd Embodiment of this invention. It is the conventional vehicle headlamp unit, (a) is a front view, (b) is a longitudinal side view.

Explanation of symbols

1 LED
1a Light emitting part (LED)
2 First reflective surface 3 Second reflective surface 4 Shade mechanism 5, 21 First shade 5a, 21a, 21b, 21c Stepped upper end 6, 22 Second shade 6a, 22a Horizontal upper end 8 Solenoid (drive means)
10, 10a, 10b, 10c, 20 Vehicle headlamp unit A, B Vehicle headlamp CL Cut line F1 First focus (of the first reflecting surface)
F2 Second focus (of the first reflecting surface)
FL Cut line L Emission light (LED)
L1 Reflected light L2 Diffused light LP1, LP2 Light distribution pattern

Claims (2)

A first reflecting surface formed as a spheroidal curved surface or a free-form surface based on a rotating ellipse, and an LED arranged with a light emitting portion facing the first reflecting surface and positioned in the vicinity of the first focal position; The second light reflecting surface that receives the light reflected by the first light reflecting surface of the LED and reflects the light forward, and the reflection of the first light reflecting surface between the first light reflecting surface and the second light reflecting surface. A vehicle headlamp unit including a shade mechanism provided so as to be able to shield a part of light ,
The shade mechanism includes a first shade having a stepped upper end similar to a cut line of a light distribution pattern, which is switched in the vicinity of the second focal position of the first reflecting surface, and a cut line of another light distribution pattern. is constructed and a second shade having a horizontal upper portion forming a,
The first shade is formed in a long plate-like body by providing a plurality of stepped upper ends so as to fit a plurality of vehicle headlamp units arranged in parallel, and the second shade is It is formed in a long plate-like body corresponding to the length of the first shade, and one of the first shade and the second shade is fixedly provided, and the other is one drive. A vehicular headlamp unit, wherein the plate-like body is provided so as to move in parallel with the one side by means. The vehicle headlamp unit according to claim 1,
One of the first shade and the second shade is provided so as to be able to project and retreat with respect to the other, and one of the first shade and the second shade is protruded from the other so as to shield part of the reflected light on the first reflection surface. In addition, the vehicle headlamp unit is characterized in that the other is protruded from one side and a part of the reflected light of the first reflecting surface is shielded by the other.

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