JP5345014B2 - Vehicle lighting - Google Patents

Abstract

A vehicular lamp includes a light source (1); a main reflector (2) that reflects light radiated from the light source (1); a shade (3) that blocks a portion of light condensed by the main reflector (2); a lens (4) that irradiates light not blocked by the shade (3); and a sub reflector (5) that is provided so as to cover the main reflector (2). The main reflector (2) is configured as divided into a first reflector portion (21), and a second reflector portion (22) that can be moved from a normal position to a different position by moving means (6). When the second reflector portion (22) is moved, light not reflected by the second reflector portion (22) is reflected and irradiated by the sub reflector (5).

Description

  The present invention relates to a vehicular lamp that can be switched to a different light distribution by a single lamp, for example, a headlamp that can be switched between a high beam light distribution and a low beam light distribution.

  Automotive lamps, particularly headlamps, require illumination with a high beam distribution called a so-called traveling beam and illumination with a low beam distribution called a passing beam. For this reason, a so-called four-lamp headlamp has been proposed in which a high beam light distribution lamp and a low beam light distribution lamp are independently provided on the left and right sides of the automobile. For example, in recent years, a lamp using a light emitting diode (LED) as a light source has been proposed. As this lamp, Patent Document 1 discloses an LED light source and an elliptical shape for temporarily collecting light emitted from the LED light source. There has been proposed a projector-type headlamp comprising a main reflector, a shade for blocking a part of light reflected by the main reflector, and a projection lens for projecting light transmitted through the shade forward. . This lamp can be configured as a lamp having a desired low beam light distribution by appropriately setting the shape of the shade. Moreover, it is also possible to comprise as a high beam light distribution lamp by not having a shade. Therefore, a four-lamp headlamp can be configured by arranging these low beam distribution lamps and high beam distribution lamps. On the other hand, a two-lamp headlamp in which the headlamps, which can switch between high beam distribution and low beam distribution with a single lamp, are also proposed. is there.

JP 2007-323839 A

  The 4-lamp headlamp has a large number of lamps and is not preferable for reducing the weight and size of an automobile. On the other hand, the two-lamp type headlamp is advantageous in reducing the number of lamps, but the structure of the lamp is complicated because the shade arranged in the lamp or the light source is switched. Is difficult to control to a desired light distribution. In particular, in the projector-type lamp using an LED as a light source as disclosed in Patent Document 1, it is difficult to dispose a plurality of light sources due to the space limitation of disposing the light source at the focal point of the main reflector, and the shade has a fixed structure. Therefore, it is difficult to switch the light distribution by adjusting the position. Therefore, a two-lamp headlamp using such a projector-type headlamp using an LED as a light source has not been realized. Such a problem can be said to be the same for a small two-lamp headlamp using a bulb (light bulb) as a light source.

  It is an object of the present invention to make it possible to configure a vehicular lamp that can be switched to a different light distribution with a single lamp, particularly a high-light light distribution and a low-beam light distribution to form a two-lamp headlamp, and to be compact. In addition, a vehicular lamp having a simple configuration is provided.

The vehicular lamp according to the present invention includes a light source, a main reflector that reflects light emitted from the light source in a condensed state, a shade that blocks part of the light collected by the main reflector, and light that is not blocked by the shade. A lens for irradiating in a predetermined direction of the vehicle; and a sub-reflector disposed so as to cover the main reflector, the main reflector reflecting a light in a nearby region including the lamp optical axis; And a second reflector part that reflects light in a region other than that and that can be moved from a normal position to a different position by a movable means. The shade is moved together with the second reflector part and lamp light is moved when moved. is configured not to block light near the axis, the light no longer reflected in the second reflector portion when the second reflector portion is moved Saburifu Characterized by being configured to reflect in the direction of Shoyo by connectors.

Te present invention smell, the second reflector portion is pivoted so that the angle with respect to the lamp optical axis changes, or may be configured to be moved parallel to the lamp optical axis direction.

  Further, in the present invention, the sub-reflector is composed of a first sub-reflector part and a second sub-reflector part, and the light from the light source is reflected by the first sub-reflector part when the second reflector part moves by a predetermined amount. The light from the light source may be reflected by the second sub-reflector part when the second reflector part moves more than a predetermined amount.

  The present invention can be configured, for example, as a two-lamp headlamp capable of switching between low beam light distribution and high beam light distribution. In this case, when the second reflector portion does not move, low beam light distribution is achieved, and the second reflector portion Is a low beam light distribution with additional area illumination, and a high beam light distribution when the second reflector unit moves more than a predetermined amount.

  According to the present invention, the main reflector is divided into the first and second reflector parts, the second reflector part is configured to be movable by the reflector movable part, and the sub reflector is provided to provide one A vehicular lamp having a different light distribution can be realized by the lamp. Therefore, for example, even when a two-lamp headlamp that switches between low beam distribution and high beam distribution is configured, there is no need to provide a plurality of light sources, and the configuration of the lamp does not increase. In addition, since the light distribution is not switched by adjusting the position of the shade, the configuration of the lamp is not so complicated.

  Further, in the present invention, the moving position of the second reflector unit is set in stages, and the sub reflector is divided into the first and second sub reflector units, so that, for example, the light is reflected by the first sub reflector at the time of low beam light distribution. An illumination area by light can be added, and a diversified low beam light distribution can be obtained.

FIG. 3 is an external perspective view showing a state in which the sub reflector of Embodiment 1 is separated. The right view which fractured | ruptured a part of Embodiment 1. FIG. FIG. 2 is a schematic longitudinal sectional view and a light distribution diagram at the time of low beam distribution according to the first embodiment. FIG. 2 is a schematic longitudinal sectional view and a light distribution diagram at the time of high beam light distribution according to the first embodiment. The external appearance perspective view similar to FIG. 1 of Embodiment 2. FIG. The right view similar to FIG. 2 of Embodiment 2. FIG. The schematic longitudinal cross-sectional view at the time of the low beam light distribution of Embodiment 2, and a light distribution diagram. The schematic longitudinal cross-sectional view at the time of the high beam light distribution of Embodiment 2, and a light distribution diagram. The schematic longitudinal cross-sectional view at the time of the low beam light distribution of Embodiment 3, and a light distribution diagram. The schematic longitudinal cross-sectional view at the time of the different low beam light distribution of Embodiment 3, and a light distribution diagram. The schematic longitudinal cross-sectional view at the time of the high beam light distribution of Embodiment 3, and a light distribution diagram.

(Embodiment 1)
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of a first embodiment in which the present invention is applied to a two-lamp headlamp disposed on the left and right sides of an automobile, and a sub-reflector described later is separated. FIG. FIG. The left and right headlamps have the same configuration, and the LED 1 as the light source, the main reflector 2 that temporarily collects the light emitted from the LED 1, and a low beam distribution by shielding part of the collected light. A shade 3 and a condenser lens 4 for irradiating the front of the vehicle with light that is not shielded by the shade 3 are provided. Further, a sub reflector 5 for obtaining a high beam light distribution is provided above the main reflector 2. Further, a reflector movable section 6 is provided for rotating the shade 3 together with a second reflector section 22 (to be described later) of the main reflector 2 and changing the position thereof.

The LED 1 is fixedly supported by a fixed plate 7 and emits light emitted from a light emitting portion serving as a light emitting point of the LED 1 from vertically above toward the surrounding area. Here, a base portion 71 is provided that protrudes in a table shape with a part of the fixing plate 7 facing upward, and the LED 1 is fixedly supported on the base portion 71. The main reflector 2 is formed in a container shape in which the ellipsoidal surface having the light emitting portion of the LED 1 as the first focal point F1 is cut in half in the vertical direction and the horizontal direction, respectively, so as to cover the upper side of the LED1. The arranged light emitted from the LED 1 is condensed on the second focal point F2 disposed in front of the lamp optical axis Lx with respect to the first focal point F1. Further, the main reflector 2 is divided into a first reflector portion 21 having a relatively small area that occupies the ellipse apex side and a second reflector portion 22 having a larger area that occupies the front side of the lamp optical axis Lx. . The first reflector portion 21 is integrally fixed to the base portion 71 of the fixing plate 7, while the second reflector portion 22 is movable by the reflector movable portion 6. The shade 3 is integrated with the second reflector portion 22 at both left and right ends. Alternatively, it is formed so as to be movable integrally with the second reflector portion 22 even if formed separately. The shade 3 is formed of a flat plate in which the central region of the front edge portion 31 is curved and retracted somewhat toward the rear of the lamp optical axis Lx, and the light collected on the second focus F2 at the front edge portion 31 is formed. It is configured to shield a part. The condensing lens 4 is composed of a convex lens whose rear focal point is disposed in the vicinity of the second focal point F2, and irradiates light that is not shielded by the shade 3 in a condensing state. The condenser lens 4 is fixedly supported by a front end support portion 72 of the fixed plate 7.

  The sub-reflector 5 is composed of a light emitting portion of the LED 1, in other words, a part of a rotating paraboloid focusing on the first focal point F1 or a position near the first focal point F1, and in other words, an upper region of the main reflector 2. It arrange | positions so that the upper area | region of said LED1 may be covered. The sub-reflector 5 is fixedly supported on the fixing plate 7 by a plurality of support arms 53 extending below the lower edge portion.

  Further, the main reflector 2 includes a pair of rotating arms 23 extending downward from left and right side edges of the second reflector portion 22. The lower end of the rotating arm 23 is connected to a support piece 73 erected on a part of the fixed plate 7 by a rotating shaft not shown in the drawing, and can be rotated on a vertical plane with the rotating shaft as a fulcrum. It is said that. Further, the right turning arm 23 as seen from the front is turned by the reflector movable portion 6. Here, the distal end of the plunger 62 of the solenoid mechanism 61 supported by the support plate 74 is connected to the fixed plate 7 in the elongated hole 24 provided in the rotating arm 23, and rotates as the plunger 62 advances and retreats. The arm 23 and the second reflector portion 22 connected to the arm 23 and the shade 3 are rotated and set to move to different rotation positions. In the solenoid mechanism 61, the advance / retreat position of the plunger 62 is controlled by a control signal from a light distribution control unit not shown in the drawing.

  In this embodiment, the shade 3 is mirror-finished, for example, by vapor-depositing aluminum so that the surface facing upward becomes a light reflecting surface.

  In the headlamp of the first embodiment, at the time of low beam light distribution, the plunger 62 of the solenoid mechanism 61 is retracted rearward by the control of the light distribution control unit, as shown in a schematic longitudinal section in FIG. . Therefore, the turning arm 23 is in the rear turning position, and the second reflector portion 22 and the shade 3 are also turned to the rear side. This rotational position on the rear side is a position where the focal point of the second reflector portion 22 coincides with the first focal point F1 and the shade 3 is directed in the horizontal direction along the lamp optical axis Lx. When the LED 1 emits light in this state, most of the emitted light is reflected by the first reflector portion 21 and the second reflector portion 22 and collected at the second focal point F2. Part of the collected light is shielded by the shade 3. The light that is not shielded is incident on a region below the lamp optical axis Lx of the lens 4, and is irradiated forward while being condensed here, and a light distribution as shown in FIG. 3B is obtained. In other words, a region below the lamp optical axis Lx is irradiated over a wide left and right region, and a horizontal cut line is formed by the shade 3 at the upper edge of the light distribution. By forming the shape of the shade 3 appropriately, the horizontal cut line in the right region is displaced below the cut line in the left region, and a low beam light distribution suitable for left-hand traffic is obtained. In this embodiment, part of the light reflected by the reflector 2 is reflected by the mirror surface of the upper surface of the shade 3 and is transmitted through the lens 4 toward the front. Irradiation efficiency can be increased by using it in part.

  On the other hand, at the time of high beam light distribution, the plunger 62 of the solenoid mechanism 61 is advanced forward by the light distribution control unit as shown in a schematic longitudinal section in FIG. Therefore, the turning arm 23 is turned forward, and the second reflector portion 22 and the shade 3 are also turned forward. This forward rotation position is a position where the second reflector portion 22 is shifted forward from the region directly above the LED 1, and the shade 3 is a position retracted below the lamp optical axis Lx. When the LED 1 emits light in this state, the light emitted upward from the LED 1 is emitted to a region above the main reflector 2 through the gap generated by the movement of the second reflector 22, and the sub-reflector 5 existing thereabove. Projected on. The light reflected by the sub-reflector 5 is irradiated forward along a direction along the lamp optical axis Lx, or an upper side or a left / right outer side. Further, the light emitted backward from the LED 1 is reflected by the first reflector portion 21, collected at the second focal point F 2, and irradiated forward through the lens 4. At this time, there is almost no light blocked by the shade 3, and light is irradiated to a region close to the lamp optical axis Lx. As a result, as shown in FIG. 4B, the illumination area formed by the reflection at the first reflector portion 21 and the illumination area formed by the reflection at the sub-reflector 5 are overlapped to include the lamp optical axis Lx. Light is irradiated with a light distribution with relatively little light diffusion in the upper and lower and left and right regions and a high light collecting property, and in particular, a high beam light distribution with an increased luminous intensity in the region along the lamp optical axis Lx can be obtained. .

  As described above, the headlamp according to the first embodiment is configured such that the main reflector of the lamp as described in Patent Document 1 is divided into the first and second reflector parts 21 and 22, and the second reflector part 22 is formed. It can be realized by adding the sub reflector 5 while being configured to be movable by the reflector movable portion 6. Therefore, even when a two-lamp headlamp is configured, it is not necessary to provide a plurality of LEDs, that is, a light source, and the configuration of the headlamp does not increase. Further, the shade 3 is fixed to the second reflector portion 22 and is moved together with the second reflector portion 22, so that fine position adjustment of the shade 3 is not required, and the reflector for rotating the second reflector portion 22 is also required. Since the structure of the movable part 6 can be configured only by the solenoid mechanism 61 and is a simple structure, the structure of the headlamp is not so complicated.

(Embodiment 2)
FIG. 5 is an external perspective view in which a part of the headlamp of Embodiment 2 is separated, and FIG. 6 is a right side view. Parts equivalent to those in the first embodiment are denoted by the same reference numerals. Also in the second embodiment, the main reflector 2 is divided into the first reflector portion 21 and the second reflector portion 22, but here the second reflector portion 22 and the shade 3 are independent, and the shade 3 is It is fixed in a state where both ends are supported by a part of the fixed plate 7, here a part of a guide piece 75 described later. The second reflector portion 22 has lamp optical axes provided on the upper surfaces of a pair of guide pieces 75 provided on the fixing plate 7 in the left-right direction with the left and right side edges 22a extending somewhat downward. The guide groove 75a is inserted into a concave guide groove 75a. The guide groove 75a guides the guide groove 75a and translates back and forth along the lamp optical axis Lx. Then, an inverted L-shaped connecting piece 25 is provided on the right side surface of the second reflector portion 22, and the plunger 62 of the solenoid mechanism 61 of the reflector movable portion 6 fixedly supported by the guide piece 75 is connected to the connecting piece 25. Then, the second reflector portion 22 is integrally moved in the front-rear direction by the forward / backward movement of the plunger 62 in the front-rear direction, and the position is changed.

  In the second embodiment, at the time of low beam distribution, the second reflector portion 22 is in a retracted position as shown in the schematic longitudinal sectional view of FIG. 7A, and the main reflector 2 is configured with the first reflector portion 21. Yes. This is the same state as in the first embodiment, and therefore the same low beam distribution as in the first embodiment is obtained as shown in FIG.

  On the other hand, at the time of high beam distribution, the second reflector 22 is moved forward along the lamp optical axis Lx by the plunger 62 of the solenoid mechanism 61 as shown in the schematic longitudinal sectional view of FIG. The When the LED 1 emits light in this state, similarly to the first embodiment, the light emitted upward is emitted to a region above the main reflector 2 through the gap between the first and second reflector portions 21 and 22. The light is reflected by the sub-reflector 5 existing above and irradiated forward. In addition, the light emitted backward from the LED 1 is reflected by the first reflector portion 21 and collected at the second focal point F2. In the second embodiment, since the shade 3 is fixed, a part of the condensed light is shielded by the shade 3, and light that is not shielded is irradiated forward through the lens 4. As a result, in the second embodiment, as shown in FIG. 8B, illumination with a relatively high luminous intensity is performed on the area including the lamp optical axis Lx as in the first embodiment. In the area, there is an illumination area having a relatively low luminous intensity in which a horizontal cut line is left by the shade 3, and a high beam light distribution in which these are superposed is obtained.

  As in the first embodiment, the headlamp according to the second embodiment has a configuration in which the main reflector 2 of the lamp is divided into first and second reflector portions 21 and 22 and the second reflector portion 22 is changed to the reflector movable portion 6. This can be realized by adding a sub-reflector 5. Therefore, even when a two-lamp headlamp is configured, it is not necessary to provide a plurality of LEDs, that is, a light source, and the configuration of the lamp does not increase. Further, since the shade 3 is fixed, a configuration for adjusting the position is unnecessary, and the configuration of the lamp is not complicated. Furthermore, since the second reflector portion 22 is moved in parallel, the configuration and position adjustment operation of the reflector movable portion 6 become simpler and easier.

(Embodiment 3)
FIG. 9A is a schematic longitudinal sectional view along the lamp optical axis Lx of the headlamp of the third embodiment. Portions equivalent to those in the first and second embodiments are denoted by the same reference numerals. In the third embodiment, the second reflector portion 22 constituting the main reflector 2 and the shade 3 are independent from each other, and the shade 3 is fixedly supported as in the second embodiment. Further, the second reflector unit 22 is configured to be translated back and forth along the lamp optical axis Lx by a reflector movable unit 6 that does not appear in the drawing, as in the second embodiment.

  On the other hand, in the third embodiment, the sub-reflector 5 is divided into the first sub-reflector portion 51 in the rear region close to the lamp optical axis Lx and the second sub-reflector portion 52 in the front region. This is different from the first and second embodiments. Here, an example in which the first sub-reflector portion 51 and the second sub-reflector portion 52 are integrated is shown. The first sub-reflector unit 51 is configured to reflect the light emitted from the LED 1 in a direction along the lamp optical axis Lx but toward a region on the left side of the lamp optical axis Lx. The second sub-reflector 52 is configured to reflect the light emitted from the LED 1 in the direction of the lamp optical axis Lx or in the left and right directions slightly above it.

    In the third embodiment, the second reflector portion 22 is in the retracted position as shown in FIG. 9A at the time of low beam light distribution, and this is the same state as in the first embodiment, and therefore, in FIG. Thus, the same low beam light distribution as in the first embodiment is obtained. Further, in the third embodiment, at the time of low beam light distribution, the second reflector portion 22 can be moved forward by a minute predetermined dimension as shown in FIG. When the second reflector part 22 is moved forward by the predetermined dimension, a minute gap is formed between the first and second reflector parts 21 and 22 immediately above the LED 1, and the light emitted from the LED 1 A part is projected onto the first sub-reflector 51 through this minute gap, and is reflected toward the front of the left side region along the lamp optical axis Lx. Therefore, as shown in FIG. 10B, in addition to the low beam light distribution, an illumination area with high luminous intensity is formed in the upper left area, and so-called overhead illumination for illuminating road signs and the like is realized.

  At the time of high beam light distribution, as shown in FIG. 11A, the second reflector portion 22 is moved from the position directly above the LED 1 to a front position that is almost completely retracted as in the second embodiment. When the LED 1 emits light in this state, similarly to the first and second embodiments, the light emitted upward is emitted to the region above the main reflector 2 through the gap between the first and second reflector portions 21 and 22. The light is reflected by the sub-reflector 5 existing above and irradiated forward. At this time, since the sub-reflector 5 is reflected by the first sub-reflector part 51 and the second sub-reflector part 52, different areas are illuminated. The light reflected by the first sub-reflector 51 is directed to the left side along the lamp optical axis Lx as shown in FIG. 10B, and the light reflected by the second sub-reflector 52 is the first and second embodiments. And is directed upward of the lamp optical axis Lx. Further, since the light emitted backward from the LED 1 is reflected by the first reflector portion 21 and collected at the second focal point F2, a part of the light is shielded by the shade 3 as in the second embodiment. Thus, in the third embodiment, as shown in FIG. 11B, illumination with high luminous intensity is performed on the area including the lamp optical axis Lx, and illumination with slightly higher luminous intensity is performed on the left area than that. In the lower region of these regions, there is an illumination region having a relatively low luminous intensity where a horizontal cut line is left, and a high beam light distribution in which these are superposed is obtained.

  The headlamp according to the third embodiment is configured such that the main reflector 2 of the lamp is divided into first and second reflector portions 21 and 22 and the second reflector portion 22 is movable by the reflector movable portion. This can be realized by newly configuring the sub-reflector 5 with the first and second sub-reflector portions 51 and 52. Therefore, even when a two-lamp headlamp is configured as in the first and second embodiments, it is not necessary to provide a plurality of LEDs, that is, a light source, and the configuration of the lamp does not increase. Further, since the shade is not moved for position adjustment, the configuration of the lamp is not complicated. Further, the moving position of the second reflector unit 22 is configured to be adjusted in two stages, and the shapes of the first and second sub-reflector units 51 and 52 are appropriately designed to achieve low beam light distribution. Arbitrary additional area illumination such as overhead light distribution can be performed, and various light distributions can be obtained.

  Here, also in the second and third embodiments, the second reflector portion of the main reflector may be configured to rotate and move so that the angle with respect to the lamp optical axis changes as in the first embodiment. However, the shade is fixed as in the second and third embodiments. Further, the configuration of the reflector movable unit that moves the second reflector unit is not limited to the solenoid mechanism described in each embodiment, and various movable mechanisms can be employed.

  In the first to third embodiments, an example in which the present invention is applied to a headlamp capable of switching between a low beam distribution and a high beam distribution has been described. However, the present invention is applicable to any vehicle lamp that requires switching between different light distributions. It is possible to apply similarly. The light source is not limited to the LED, and can be applied to other light emitters, for example, a vehicular lamp using a bulb as a light source.

  Further, in the first to third embodiments, the sub-reflector is configured with a paraboloid of revolution, but is not limited to this shape, and the configuration of the sub-reflector can be changed as appropriate according to the required light distribution. Is possible. In particular, the first sub-reflector part of the third embodiment illuminates the left front area of the own vehicle during low beam light distribution, but when trying to illuminate the area just before the left side or the left side area of the own vehicle, Thus, the light may be reflected.

  The present invention can be applied to a vehicular lamp that obtains a desired light distribution with a small and simple configuration, and particularly to a vehicular lamp that can be switched to a different light distribution with one lamp.

1 LED
2 Main reflector 3 Shade 4 Lens 5 Sub reflector 6 Reflector movable part 21 First reflector part 22 Second reflector part 51 First sub reflector part 52 Second sub reflector part

Claims (5)

A light source, a main reflector that reflects light emitted from the light source in a condensed state, a shade that blocks part of the light collected by the main reflector, and light that is not blocked by the shade in a predetermined direction of the vehicle And a sub-reflector disposed so as to cover the main reflector, the main reflector reflecting a light in a nearby region including a lamp optical axis, and other regions The second reflector part that reflects light and can be moved from a normal position to a different position by a movable means is divided, and the shade is moved together with the second reflector part and moved near the lamp optical axis. It consists of light so as not to shield, before the light is no longer reflected in the second reflector portion when the second reflector portion is moved Vehicle lamp, characterized by being configured to reflect in the direction of Shoyo by the sub-reflector. 2. The vehicular lamp according to claim 1 , wherein the second reflector portion is rotated so that an angle with respect to the lamp optical axis is changed, or is translated in the lamp optical axis direction. Wherein when the second reflector portion is not moved is low beam light distribution, the vehicle lamp according to claim 1 or 2, characterized in that a high beam light distribution when the second reflector portion is moved. The sub-reflector includes a first sub-reflector part and a second sub-reflector part, and when the second reflector part moves by a predetermined amount, the light from the light source is reflected by the first sub-reflector part, and the second sub-reflector part the vehicular lamp according to claim 1 or 2, characterized in that the reflector unit is reflected at the second sub reflector portion of the light from the light source when moving more than a predetermined amount. When the second reflector part does not move, the light beam distribution is low, and when the second reflector part moves a predetermined amount, the light beam distribution has an additional area illumination, and the second reflector part moves more than the predetermined amount. The vehicular lamp according to claim 4 , which has a high beam distribution.

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