JP2009211980A - Daytime running lamp, and vehicular headlamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a daytime running lamp inexpensively mountable on a vehicle without needing a daytime running lamp-dedicated on-vehicle space. <P>SOLUTION: This daytime running lamp 50 is formed as a lamp unit incorporated in a reflector unit 20 for a headlamp, and the need of an exclusive on-vehicle space is obviated. The daytime running lamp 50 includes: a light emitting element 52 arranged on an optical axis Ax2 extending to penetrate a reflector 24 of the reflector unit 20 in the front-rear direction by being directed frontward on the front side of the reflector 24; a main lens 54 arranged on the optical axis Ax2 on the front side thereof; and a sub-lens 56 formed into a ring-like shape to extend rearward from its rear surface edge part, and deflecting and emitting the light from the light emitting element 52 to be entered in a reflecting surface 24a of the reflector 24; and thereby a large light emission area is secured. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a daytime running lamp configured to emit light toward the front of a vehicle during daytime running, and a vehicle headlamp incorporating the daytime running lamp.

  The daytime running lamp is a lamp that is configured to irradiate the front of the vehicle during daytime driving to increase the vehicle's driving safety, thereby notifying oncoming drivers and pedestrians of the existence of the vehicle. It is.

  As described in, for example, “Patent Document 1”, the daytime running lamp is attached to, for example, a front bumper of a vehicle as an independent lamp separate from a headlamp (that is, a vehicle headlamp). It is used in the state.

JP 2006-164909 A

  Since the above-mentioned conventional daytime running lamp is configured as an independent lamp separate from the headlamp, a dedicated in-vehicle space for mounting it is necessary, and the product cost and the installation cost are high. There is a problem.

  The present invention has been made in view of such circumstances, and does not require a dedicated vehicle space for daytime running lamps, and can be mounted on a vehicle at low cost. And it aims at providing the vehicle headlamp incorporating this daytime running lamp.

  In the present invention, a daytime running lamp is incorporated as a lamp unit in a reflector unit for a headlamp, and the above object is achieved by devising the configuration.

That is, the daytime running lamp according to the present invention is:
In daytime running lamps that are configured to emit light toward the front of the vehicle during daytime driving,
As a lamp unit incorporated in a reflector unit for a headlamp, comprising: a light source disposed on a first optical axis extending in the longitudinal direction of the vehicle; and a reflector that reflects light from the light source forward. Configured,
A light emitting element disposed on the second optical axis extending so as to penetrate the reflector in the front-rear direction and forwardly on the front side of the reflector;
A main lens disposed on the second optical axis on the front side of the light emitting element;
A sub-lens that is formed in a ring shape so as to extend rearward from the peripheral edge of the rear surface of the main lens, and that deflects and emits light from the light-emitting element so as to enter the reflecting surface of the reflector. It is characterized by this.

  The “reflector unit” may be a reflector unit for forming a high beam light distribution pattern, or a reflector unit for forming a low beam light distribution pattern as long as it is a head lamp reflector unit. May be.

  The “second optical axis” is not necessarily an axis parallel to the first optical axis as long as it is an axis extending so as to penetrate the reflector in the front-rear direction.

  The type of the “light emitting element” is not particularly limited, and for example, a light emitting diode or a laser diode can be employed. Further, the shape and size of the light emitting chip of the “light emitting element” are not particularly limited.

  As long as the “main lens” is disposed on the second optical axis on the front side of the light emitting element, the specific lens shape, the distance from the light emitting element, and the like are not particularly limited. Absent.

  The above-mentioned “sub lens” may be formed integrally with the main lens or formed separately if it is formed in a ring shape so as to extend rearward from the peripheral edge of the rear surface of the main lens. It may be. Further, the specific lens shape of the “sub lens” is not particularly limited as long as the “sub lens” is configured to deflect and emit light from the light emitting element so as to enter the reflecting surface of the reflector. .

  As shown in the above configuration, the daytime running lamp according to the present invention is configured as a lamp unit incorporated in a reflector unit for headlamps. A dedicated in-vehicle space for mounting can be eliminated.

  In addition, the daytime running lamp according to the present invention is arranged forward on the front side of the reflector on the second optical axis extending so as to penetrate the reflector of the reflector unit in the front-rear direction. A light emitting element, a main lens disposed on the second optical axis on the front side of the light emitting element, and a ring shape extending rearward from the rear peripheral edge of the main lens; Since the sub-lens that deflects and emits the light from the reflector so as to enter the reflecting surface of the reflector, the following operational effects can be obtained.

  In other words, light from the light emitting element is appropriately deflected and emitted by the main lens to emit light over an angular range necessary for notifying an oncoming vehicle driver or a pedestrian of the presence of the vehicle. Can do.

  At that time, if the light irradiation as the daytime running lamp is performed only by the light emitted from the main lens, the luminance increases when the front projection area of the main lens is small. On the other hand, in order to reduce the luminance to such an extent that glare is not given to an oncoming vehicle driver or a pedestrian, it is necessary to considerably increase the front projection area of the main lens. However, in this case, since the space occupied by the daytime running lamp in the reflector unit becomes large, the function of the reflector unit is hindered.

  In that respect, in the present invention, the sub-lens formed in a ring shape deflects and emits the light from the light emitting element so as to enter the reflecting surface of the reflector. Light irradiation required as a daytime running lamp can be performed by the light and the light emitted from the main lens. In this case, since the light emitting surface as the daytime running lamp is composed of the main lens and a part of the reflecting surface of the reflector, a considerably large light emitting area can be secured. Therefore, even if the front projection area of the main lens is reduced, the function as a daytime running lamp can be ensured while preventing the luminance from becoming too high. This also makes it possible to keep the space occupied by the daytime running lamp in the reflector unit small, so that the function of the reflector unit is not hindered.

  Thus, according to the present invention, it is possible to obtain a daytime running lamp that can be mounted on a vehicle at a low cost without requiring a dedicated vehicle space for the daytime running lamp.

  In the above configuration, if the light emission center of the light source in the reflector unit for the headlamp is included in the light bundle of light from the light emitting element deflected and emitted from the sub lens, the following effects can be obtained. it can.

  That is, in the reflector unit for headlamps, the reflection control by the reflector that is performed on the light from the light source is performed based on the vehicle front-rear direction in which the first optical axis extends. By making the part pass through the light emission center of the light source, the reflection control by the reflector is performed for a part of the light from the light emitting element in the same manner as for the light from the light source. Can do. This makes it possible to easily form the light distribution pattern formed by the light from the light emitting element reflected by the reflector as a light distribution pattern centered on the vehicle front direction. It can be suitable for the light distribution pattern.

  In the above configuration, if the sub lens is subjected to surface treatment for diffusing the light from the light emitting element at least in the front-rear direction, the light from the light emitting element deflected and emitted from the sub lens is reflected by the reflector. It is possible to make the light incident on the surface over a wider range, thereby securing a larger light emitting area.

  In this case, the kind of “surface treatment for diffusing at least in the front-rear direction” is not particularly limited, and for example, embossing or frosting can be employed.

  In the above configuration, if the second optical axis is positioned substantially vertically below the first optical axis, the heat generated by the light source of the reflector unit for the headlamp causes the light emitting element of the daytime running lamp. The possibility that the characteristics will change can be eliminated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a headlamp 10 including a reflector unit 20 in which a daytime running lamp 50 according to an embodiment of the present invention is incorporated. FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

  As shown in these drawings, the headlamp 10 is a high beam headlamp, and the reflector unit 20 is housed in a lamp chamber formed by a lamp body 12 and a transparent transparent cover 14 so that the optical axis can be adjusted. It has been configured.

  The reflector unit 20 includes a light source 22a disposed on a first optical axis Ax1 extending in the vehicle front-rear direction, and a reflector 24 that reflects light from the light source 22a forward, and optical axis adjustment is performed. When completed, the optical axis Ax1 coincides with the vehicle longitudinal direction.

  The light source 22a is a filament of the halogen bulb 22, and is configured as a line segment light source extending along the optical axis Ax1.

  The reflector 24 has a reflection surface 24a in which a plurality of reflection elements 24s are formed in a vertical stripe shape on a rotary paraboloid with the light emission center A of the light source 22a on the optical axis Ax1 as a focal point and the optical axis Ax1 as a central axis. Have. The reflector 24 reflects the light from the light source 22a as light parallel to the optical axis Ax1 in the vertical direction and the right and left of the optical axis Ax1 in the horizontal direction at each reflective element 24s of the reflective surface 24a. Reflected as light diffusing to both sides, thereby forming a horizontally long high beam light distribution pattern.

  The reflector 24 has a configuration in which the halogen bulb 22 is inserted and fixed in a bulb insertion hole 24b formed in the rear top portion of the reflecting surface 24a. Further, the reflecting surface 24a of the reflector 24 has an outer peripheral edge shape set in a circular shape, and an outer diameter thereof is set to about φ150 mm.

  The daytime running lamp 50 is configured as a small lamp unit incorporated in the reflector unit 20 below the optical axis Ax1, and emits light toward the front of the vehicle during daytime running.

  The daytime running lamp 50 includes a light emitting element 52 arranged forward on the front side of the reflector 24 on a second optical axis Ax2 extending so as to penetrate the reflector 24 in the front-rear direction, and the light emission. On the front side of the element 52, a main lens 54 disposed on the optical axis Ax2, a sub-lens 56 formed in a ring shape so as to extend rearward from the rear peripheral edge of the main lens 54, and these It comprises a heat sink 58 that supports it.

  The optical axis Ax2 is set as an axis extending in parallel to the optical axis Ax1 vertically below the optical axis Ax1.

  The light emitting element 52 is a white light emitting diode, and includes a light emitting chip 52a having a light emitting surface having a horizontally long rectangular shape (specifically, a rectangle having a length of about 1 mm and a width of about 4 mm) and a substrate 52b that supports the light emitting chip 52a. It has become. At this time, the light emitting chip 52a of the light emitting element 52 is sealed with a thin film formed so as to cover the light emitting surface. The light emitting element 52 has the light emission center of the light emitting chip 52a positioned on the optical axis Ax2, and between the light emission center A of the light source 22a and the front edge of the reflector 24 in the front-rear direction (specifically, both It is positioned and fixed to the heat sink 58 so as to be positioned at the approximate center).

  The main lens 54 and the sub lens 56 are integrally formed as a glass lens, and the outermost diameter thereof is set to a size of about φ26 mm. The main lens 54 and the sub lens 56 are positioned and fixed to the heat sink 58 on the rear end surface of the sub lens 56.

  The main lens 54 is a plano-convex lens having a convex front surface and a flat rear surface, and has a focal length set to a value of about 10 mm and a lens thickness set to a value of about 10 mm. . The distance from the rear side surface of the main lens 54 to the light emitting surface of the light emitting chip 52a is set to a value of about 5 mm. Therefore, the light emitting chip 52a is positioned in front of the rear focus of the main lens 54. As a result, the main lens 54 converts the light from the light emitting chip 52a into light that diffuses to some extent in the vertical and horizontal directions (specifically, diffused light having a diffusion angle of about 20 to 25 ° from the optical axis Ax2). It is made to emit.

  The inner peripheral surface of the sub lens 56 is a cylindrical surface centered on the optical axis Ax2, and the outer peripheral surface is a spherical surface centered on a point near the light emission center of the light emitting chip 52a on the optical axis Ax2. It consists of The sub lens 56 deflects and emits the light from the light emitting chip 52 a so as to enter the reflecting surface 24 a of the reflector 24.

  Specifically, the sub lens 56 deflects the light from the light emitting chip 52a to the rear side from the direction in which the light from the light emitting chip 52a travels when it is assumed that the sub lens 56 does not exist, and the front and rear direction. The light is emitted so as to be slightly diffused. At this time, the sub lens 56 makes the emitted light from the vicinity of the front edge thereof a light heading slightly forward with respect to the plane orthogonal to the optical axis Ax2, and the emitted light from the vicinity of the rear edge thereof. The light travels slightly rearward with respect to a plane orthogonal to the optical axis Ax2. Then, the deflected emitted light from the sub lens 56 is outside the reflection surface 24a of the reflector 24 because the sub lens 56 is located between the light emission center A of the light source 22a and the front edge of the reflector 24. It will enter into the peripheral edge region.

  The light from the light emitting chip 52a incident on the region near the upper edge of the reflecting surface 24a is reflected as downward light, and the light from the light emitting chip 52a incident on the region near the lower edge is reflected as upward light, The light from the light emitting chip 52a incident on the area near the left edge is reflected as rightward light, and the light from the light emitting chip 52a incident on the area near the right edge is reflected as leftward light. At this time, the reflected light from each region on the reflecting surface 24a becomes light that diffuses to the left and right because the reflecting surface 24a has a plurality of reflecting elements 24s.

  The heat sink 58 is inserted and fixed in an opening 24c formed in a region below the optical axis Ax1 in the reflector 24, and the light emitting element 52 and the sub lens 56 are positioned and supported on the front end surface thereof. A plurality of radiating fins 58a are formed on the rear end surface of the heat sink 58.

  FIG. 3 is a front view showing the reflector unit 20 in a state where the daytime running lamp 50 is lit.

  As shown in the figure, when the daytime running lamp 50 is turned on, the main lens 54 appears to shine brightly as a light emitting area Z1 as indicated by the mesh line in the figure due to the light emission of the light emitting chip 52a of the light emitting element 52. At the same time, a region near the outer peripheral edge of the reflecting surface 24a of the reflector 24 appears to shine as a light emitting region Z2 as indicated by a mesh line in the drawing. At this time, the light emitting region Z2 is an annular region that is not uniform in the vertical direction, in which the portion near the lower edge of the reflecting surface 24a of the reflector 24 is narrow and the portion near the upper edge is wide.

  FIG. 4A is a perspective view of a light distribution pattern P1 formed on a virtual vertical screen arranged at a position 10 m ahead of the lamp by light irradiated forward from the daytime running lamp 50 according to the present embodiment. FIG.

  The light distribution pattern P1 is formed as a combined light distribution pattern of the light distribution pattern PA shown in FIG. 5B and the light distribution pattern PB shown in FIG.

  The light distribution pattern PA is a light distribution pattern formed by light emitted from the light emitting chip 52 a of the light emitting element 52 and emitted forward through the main lens 54.

  This light distribution pattern PA is formed as a light distribution pattern that extends in a substantially circular shape centering on HV, which is a vanishing point in the front direction of the lamp, and its maximum luminous intensity is set to a value of about 800 cd. .

  The light distribution pattern PA is formed as a light distribution pattern extending in a substantially circular shape with HV as the center, because the light emitting chip 52a is positioned in front of the rear focal point of the main lens 54. This is because the light from the light emitting chip 52a is emitted as diffused light that is uniformly diffused in the vertical and horizontal directions by the main lens 54. At this time, the reason why the central region of the light distribution pattern PA is formed to be slightly horizontally long is that the light emitting chip 52a has a light emitting surface having a horizontally long rectangular shape.

  In this light distribution pattern PA, a plurality of curves formed substantially concentrically with the curve indicating the contour are isoluminous curves, and the light distribution pattern PA is gradually brightened from the outer peripheral edge toward the center. It shows that it becomes.

  On the other hand, the light distribution pattern PB is emitted from the light emitting chip 52a of the light emitting element 52, is incident on the reflecting surface 24a of the reflector 24 through the sub lens 56, and then is reflected forward by the reflecting surface 24a. It is the light distribution pattern formed.

  This light distribution pattern PB is formed as a slightly horizontally elongated substantially inverted A-shaped light distribution pattern with HV at the center. In this case, the light distribution pattern PB is formed as a light distribution pattern having a substantially inverted triangular area centered on HV as a hollow area and overlapping with the peripheral edge of the light distribution pattern PA.

  This light distribution pattern PB is formed as a substantially inverted A-shaped light distribution pattern centered on HV because the sub-lens 56 of the daytime running lamp 50 is positioned vertically below the optical axis Ax1. This is because the deflected emitted light from the sub lens 56 is incident on the region near the outer peripheral edge of the reflecting surface 24a of the reflector 24 while being disposed on the front side of the light emission center A. At this time, the light distribution pattern PB is formed as a slightly horizontally long light distribution pattern because the light emitting chip 52a has a light emitting surface having a horizontally long rectangular shape and a plurality of reflections on the reflecting surface 24a of the reflector 24. This is because the element 24s is formed.

  The light distribution pattern PB is formed as a light distribution pattern having the same brightness as that of the peripheral edge of the light distribution pattern PA.

  Next, the effect of this embodiment is demonstrated.

  Since the daytime running lamp 50 according to the present embodiment is configured as a lamp unit incorporated in the reflector unit 20 for the headlamp 10, the daytime running lamp 50 is dedicated for mounting the daytime running lamp 50 separately from the headlamp 10. The vehicle-mounted space can be made unnecessary.

  In addition, the daytime running lamp 50 according to the present embodiment is disposed forward on the optical axis Ax2 extending so as to penetrate the reflector 24 of the reflector unit 20 in the front-rear direction on the front side of the reflector 24. The light emitting element 52 formed on the optical axis Ax2 on the front side of the light emitting element 52, and a ring shape extending rearward from the rear peripheral edge of the main lens 54. In addition, since the sub-lens 56 that deflects and emits the light from the light emitting element 52 so as to enter the reflecting surface 24a of the reflector 24 is provided, the following operational effects can be obtained.

  That is, the main lens 54 emits light from the light emitting element 52 by appropriately deflecting and emitting the light over an angular range necessary to inform the oncoming driver or pedestrian of the existence of the own vehicle. It can be carried out.

  At this time, if the light irradiation as the daytime running lamp 50 is performed only by the light emitted from the main lens 54, the front projection area of the main lens 54 is small, so that the luminance is increased. On the other hand, in order to reduce this luminance to such an extent that there is no possibility of giving glare to an oncoming vehicle driver or a pedestrian, the front projection area of the main lens 54 needs to be made considerably larger than in the case of this embodiment. is there. However, in this case, since the space occupied by the daytime running lamp 50 in the reflector unit 20 becomes large, the function of the reflector unit 20 is hindered.

  In this respect, in the present embodiment, the light from the light emitting element 52 is deflected and emitted by the ring-shaped sub lens 56 and is incident on the reflecting surface 24 a of the reflector 24. The light irradiation required for the daytime running lamp 50 can be performed by the reflected light from the reflecting surface 24a and the emitted light from the main lens 54. In this case, the light emitting surface as the daytime running lamp 50 is composed of the light emitting region Z1 of the main lens 54 and a part of the light emitting region Z2 of the reflecting surface 24a of the reflector 24. A considerably large light emitting area can be secured. Therefore, even if the front projection area of the main lens 54 is reduced, the function as the daytime running lamp 50 can be ensured while preventing the luminance from becoming too high. This also makes it possible to keep the space occupied by the daytime running lamp 50 in the reflector unit 20 small, so that the function of the reflector unit 20 is not hindered.

  Thus, according to this embodiment, the daytime running lamp 50 that can be mounted on the vehicle can be obtained at low cost without requiring a vehicle-mounted space dedicated to the daytime running lamp.

  At this time, in the present embodiment, since the optical axis Ax2 of the daytime running lamp 50 is positioned vertically below the optical axis Ax1 of the reflector unit 20, the daytime running lamp 50 is heated by the heat generated by the light source 22a of the reflector unit 20. The possibility that the characteristics of the light emitting element 52 of the time running lamp 50 will change can be eliminated.

  In the above embodiment, the main lens 54 and the sub lens 56 have been described as being integrally formed as glass lenses. However, instead of the glass lenses, they may be resin lenses. In addition, these may be formed separately and fixed to each other by bonding or the like.

  In the above embodiment, the light emitting chip 52a of the light emitting element 52 has been described as having a horizontally long light emitting surface. However, the light emitting chip 52a has a light emitting surface having a shape other than this (for example, a square). Of course it is also possible to do.

  Further, in the above embodiment, the reflecting surface 24a of the reflector 24 has a circular outer peripheral edge shape, and the outer diameter is set to a size of about φ150 mm. Of course, a configuration having a peripheral shape and an outer diameter is also possible.

  In the above embodiment, the light source 22a of the reflector unit 20 has been described as the filament of the halogen bulb 22, but the same operation as in the above embodiment can be achieved even in the case where the light emitting portion of the discharge bulb is used. An effect can be obtained.

  Further, in the above embodiment, the case where the daytime running lamp 50 is incorporated in the high beam reflector unit 20 has been described. However, even in the case where the daytime running lamp 50 is incorporated in the low beam reflector unit, the same as in the above embodiment. An effect can be obtained.

  Next, a modification of the above embodiment will be described.

  First, a first modification of the above embodiment will be described.

  FIGS. 5 and 6 are views similar to FIGS. 2 and 3 showing the reflector unit 120 in which the daytime running lamp 150 according to this modification is incorporated.

  As shown in these drawings, the basic configuration of the daytime running lamp 150 according to the present modification is the same as that of the above embodiment, but the configuration of the heat sink 158 and the mounting position in the reflector unit 120 are the above. This is different from the case of the embodiment. In addition, the reflector unit 120 according to the present modification is the same as the reflector unit 20 of the above embodiment in the basic configuration, but the configuration of the reflector 124 is partially different from the reflector 24 of the above embodiment. .

  Note that in the daytime running lamp 150 and the reflector unit 120 according to this modification, the same parts as those of the daytime running lamp 50 and the reflector unit 20 according to the above-described embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Omitted.

  The daytime running lamp 150 according to this modification is arranged so that the light emission center of the light emitting chip 52a in the light emitting element 52 is located at substantially the same position as the light emission center A of the light source 22a in the front-rear direction. Accordingly, the heat sink 158 of the daytime running lamp 150 has a shorter front-rear length than the heat sink 58 of the above embodiment. The other configuration of the daytime running lamp 150 is the same as that of the daytime running lamp 50 of the above embodiment.

  In the reflector unit 120 according to this modification, a reflective surface 124d different from the reflective surface 24a is formed in a portion of the reflective surface 24a of the reflector 124 located below the daytime running lamp 150. This is because light from the light source 22a hardly enters a portion of the reflecting surface 24a located below the daytime running lamp 150, and this portion is effectively used as a reflecting surface 124d dedicated to the daytime running lamp 150. It is what you do. The configuration of the reflecting surface 24a in the reflector 124 is exactly the same as in the above embodiment.

  The light-emitting element 52 of the daytime running lamp 150 according to this modification has the light-emitting chip 52a located substantially at the same position as the light emission center A of the light source 22a with respect to the front-rear direction and slightly ahead of the light-emitting element 52. The sub lens 56 converts the emitted light from the vicinity of the front edge to light slightly forward with respect to the plane orthogonal to the optical axis Ax2, and the emitted light from the rear edge vicinity to the optical axis Ax2. Since the light travels slightly backward with respect to the orthogonal plane, the light bundle of light from the light emitting chip 52a that is deflected and emitted from the sub lens 56 toward the reflecting surface 24a of the reflector 124 includes: The light emission center A of the light source 22a in the reflector unit 20 is included. Then, the deflected emitted light from the sub lens 56 is incident on a region closer to the inner peripheral side than the region near the outer peripheral edge of the reflecting surface 24a of the reflector 124, whereby a region indicated by a mesh line in FIG. 6 is a light emitting region Z3. It will look shining.

  As a result, light from the light emitting chip 52a deflected and emitted from the sub lens 56 and incident on the reflection surface 24a is diffused slightly upward and downward on the reflection surface 24a in the vertical direction and left and right in the horizontal direction. It is reflected as diffused light that diffuses on both sides. At this time, the reflected light from each region on the reflecting surface 24a becomes light that diffuses more greatly on both the left and right sides because a plurality of reflecting elements 24s are formed on the reflecting surface 24a.

  On the other hand, the reflecting surface 124d of the reflector 124 is composed of a spheroid having a light emitting center of the light emitting chip 52a as a first focal point and a point located in front of the reflecting surface 124d as a second focal point. Thereby, the light from the light emitting chip 52a which is deflected and emitted from the sub lens 56 and is incident on the reflecting surface 124d is diffused slightly upward in the vertical direction and diffused in both the upper and lower sides and diffused in the left and right sides in the horizontal direction. It will be reflected as light. Then, on this reflecting surface 124d, the area indicated by the mesh line in FIG. 6 appears to shine as the light emitting area Z4.

  FIG. 7A is a perspective view of a light distribution pattern P2 formed on a virtual vertical screen disposed at a position 10 m ahead of the lamp by light irradiated forward from the daytime running lamp 150 according to this modification. FIG.

  The light distribution pattern P2 is formed as a combined light distribution pattern of the light distribution pattern PA shown in FIG. 5B and the two light distribution patterns PC and PD shown in FIG.

  The light distribution pattern PA is exactly the same as the light distribution pattern PA in the light distribution pattern P1 of the above embodiment.

  The light distribution pattern PC is formed by light that is emitted from the light emitting chip 52a of the light emitting element 52, is incident on the reflecting surface 24a of the reflector 124 through the sub lens 56, and then is reflected forward by the reflecting surface 24a. Light distribution pattern.

  This light distribution pattern PC is formed as a horizontally long light distribution pattern centered on a point located slightly below HV.

  The light distribution pattern PC is formed as a light distribution pattern centered on a point located slightly below HV. The light emitting chip 52a that is deflected and emitted from the sub lens 56 toward the reflection surface 24a of the reflector 124. This is because the light emission center A includes the light emission center A of the light source 22a in the reflector unit 20 and the reflected light from the reflecting surface 24a is slightly downward. In addition, the light distribution pattern PC is formed as a horizontally long light distribution pattern because the light emitting chip 52a has a light emitting surface having a horizontally long rectangular shape, and the reflected light from the reflecting surface 24a includes a plurality of light beams. This is because the reflecting element 24s diffuses more to the left and right sides than to the up and down direction.

  On the other hand, the light distribution pattern PD is emitted from the light emitting chip 52a of the light emitting element 52, is incident on the reflecting surface 124d of the reflector 124 via the sub lens 56, and then is reflected forward by the reflecting surface 124d. It is the light distribution pattern formed.

  This light distribution pattern PD is formed as a slightly horizontally long light distribution pattern centered on a point located slightly above HV.

  This light distribution pattern PD is formed as a light distribution pattern centered on a point located slightly above HV because the reflection surface 124d of the reflector 124 has the light emission center of the light emitting chip 52a as the first focal point. In addition, it is constituted by a spheroid having a second focal point at a point located in front of the reflecting surface 124d, and the reflected light from the reflecting surface 124d is slightly upward. The light distribution pattern PD is formed as a slightly horizontally long light distribution pattern because the light emitting chip 52a has a horizontally long light emitting surface.

  By adopting the configuration of this modified example, the light distribution pattern PC formed by the light from the light emitting element 52 reflected by the reflection surface 24a of the reflector 24 is not a hollow light distribution pattern, but is in the vicinity of HV. It is possible to easily form a light distribution pattern centered on a point, and this can be made suitable for the light distribution pattern of the daytime running lamp 50.

  In addition, the reflector unit 120 according to this modification has a reflecting surface 124d different from the reflecting surface 24a formed in a portion of the reflecting surface 24a of the reflector 124 located below the daytime running lamp 150. The light distribution pattern PD formed by the light from the light emitting element 52 reflected by the reflection surface 124d is formed as a light distribution pattern having a point near the HV as a center and partially overlapping the light distribution pattern PC. Thus, the light distribution pattern P2 as a whole can be made more preferable as the light distribution pattern of the daytime running lamp 50.

  In addition, by using the portion of the reflecting surface 24a of the reflector 124 positioned below the daytime running lamp 150 as the reflecting surface 124d dedicated to the daytime running lamp 150, the light distribution pattern P2 can be further improved as described above. Not only can the light distribution pattern be preferable, but the luminous flux utilization rate for the light from the light emitting element 52 can be further increased.

  Next, a second modification of the above embodiment will be described.

  FIGS. 8 and 9 are views similar to FIGS. 2 and 3, showing the reflector unit 20 in which the daytime running lamp 250 according to this modification is incorporated.

  As shown in these drawings, the basic configuration of the daytime running lamp 250 according to this modification is the same as that of the above embodiment, but the configuration of the sub lens 256 is partially the same as that of the above embodiment. Is different.

  In the daytime running lamp 250 and the reflector unit 20 according to this modification, the same parts as those of the daytime running lamp 50 and the reflector unit 20 according to the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. Omitted.

  In the daytime running lamp 250 according to this modification, the sub lens 256 is subjected to surface treatment for diffusing light from the light emitting element 52 at least in the front-rear direction. Specifically, the outer peripheral surface of the sub lens 256 is formed as a textured surface 256a that has been subjected to a textured process, whereby the light from the light emitting element 52 is diffused little by little in all directions. It is made to emit.

  By adopting the configuration of this modification, the light from the light emitting element 52 deflected and emitted from the sub-lens 256 can be incident on the reflecting surface 24a of the reflector 24 over a wider range, thereby further increasing the light emitting area. Can be secured.

  That is, the area indicated by the mesh line in FIG. 9 appears to shine as the light emitting area Z5. This light emitting region Z5 is a light emitting region in the case where the outer peripheral surface of the sub-lens 256 is not subjected to graining as in the above embodiment (that is, in the above embodiment in which the boundary line is indicated by a two-dot chain line in FIG. 9). A larger light emitting area can be ensured as compared with the light emitting region Z2).

  In addition, the numerical value shown as a specification in the said embodiment and modification is only an example, and of course, you may set these to a different value suitably.

The front view which shows the headlamp provided with the reflector unit incorporating the daytime running lamp which concerns on one Embodiment of this invention Sectional view taken along line II-II in FIG. 1 showing the reflector unit. Front view showing the reflector unit with the daytime running lamp lit (A) is a diagram transparently showing a light distribution pattern formed on a virtual vertical screen arranged at a position 10 m ahead of the lamp by light irradiated forward from the daytime running lamp, (b), (C) is a figure which shows the light distribution pattern which comprises the said light distribution pattern, respectively. The figure similar to FIG. 2 which shows the reflector unit incorporating the daytime running lamp which concerns on the 1st modification of the said embodiment. The same figure as FIG. 3 which shows the reflector unit incorporating the daytime running lamp which concerns on the said 1st modification. The same figure as FIG. 4 which shows the effect | action of the said 1st modification. The figure similar to FIG. 2 which shows the reflector unit incorporating the daytime running lamp which concerns on the 2nd modification of the said embodiment. The figure similar to FIG. 3 which shows the reflector unit incorporating the daytime running lamp which concerns on the said 2nd modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Headlamp 12 Lamp body 14 Transparent cover 20, 120 Reflector unit 22 Halogen bulb 22a Light source 24, 124 Reflector 24a, 124d Reflective surface 24b Bulb insertion hole 24c Opening 24s Reflective element 50, 150, 250 Daytime running lamp 52 Light emission Element 52a Light-emitting chip 52b Substrate 54 Main lens 56, 256 Sub-lens 58, 158 Heat sink 58a Radiation fin 256a Textured surface A Light emission center Ax1 First optical axis Ax2 Second optical axis Z1, Z2, Z3, Z4, Z5 Light emission Area P1, P2, PA, PB, PC, PD Light distribution pattern

Claims (5)

In daytime running lamps that are configured to emit light toward the front of the vehicle during daytime driving,
As a lamp unit incorporated in a reflector unit for a headlamp, comprising: a light source disposed on a first optical axis extending in the longitudinal direction of the vehicle; and a reflector that reflects light from the light source forward. Configured,
A light emitting element disposed on the second optical axis extending so as to penetrate the reflector in the front-rear direction and forwardly on the front side of the reflector;
A main lens disposed on the second optical axis on the front side of the light emitting element;
A sub-lens that is formed in a ring shape so as to extend rearward from the peripheral edge of the rear surface of the main lens, and that deflects and emits light from the light-emitting element so as to enter the reflecting surface of the reflector. A daytime running lamp characterized by that.   2. The daytime running lamp according to claim 1, wherein a light emission center of the light source is included in a light bundle of light from the light emitting element deflected and emitted from the sub lens.   The daytime running lamp according to claim 1 or 2, wherein the sub lens is subjected to a surface treatment for diffusing light from the light emitting element in at least the front-rear direction.   The daytime running lamp according to any one of claims 1 to 3, wherein the second optical axis is positioned substantially vertically below the first optical axis.   5. A vehicle headlamp comprising the daytime running lamp according to claim 1 incorporated therein.

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