JP2020140888A - Vehicular lighting fixture - Google Patents

Abstract

To decrease the number of components.SOLUTION: A vehicular lighting fixture 1 has a light source 2, a reflector unit 4 which reflects light emitted from the light source 2, and a projection lens 6 which projects the light reflected by the reflector unit 4 in an optical-axis direction Z. In the vehicular lighting fixture 1, the reflector unit 4 integrally has a reflection part 41 which has a reflecting surface 41a for reflecting the light emitted from the light source 2, and a lens holding part 42 which holds the projection lens 6. The reflecting surface 41a has a first reflecting surface 41b, and a second reflecting surface 41c positioned on the opposite side from the lens holding part 42 across the light source 2 and formed connecting with the first reflecting surface 41b. The lens holding part 42 has a holding surface orthogonal to the optical axis direction Z to hold the projection lens. The second reflecting surface 41c is a surface inclined such that a front end 41d of the second reflecting surface 41c is closer to the light source 2 based upon the holding surface 42a.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to vehicle lighting equipment.

A conventional vehicle headlight has a first reflector and a second reflector that reflect the light of a light source toward a projection lens. Since the first reflecting surface of the first reflector and the second reflecting surface of the second reflector are formed discontinuously, the light source and the second reflecting surface of the second reflector are arranged below the optical axis of the projection lens. Suppresses the decrease in luminous intensity of the light distribution pattern (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-143226

In the conventional vehicle headlight, the first reflector and the second reflector are separately configured, and the projection lens is supported by a support member different from these two reflectors. Therefore, there is a problem that the number of parts of the headlight for a vehicle increases.

The present disclosure has focused on the above problems, and an object of the present disclosure is to provide a vehicle lighting tool that reduces the number of parts.

In order to achieve the above object, the vehicle lamp of the present disclosure includes a light source, a reflector that reflects the light emitted from the light source, and a projection lens that projects the light reflected by the reflector in the optical axis direction. In this vehicle lamp, the reflector integrally includes a reflecting portion having a reflecting surface that reflects light emitted from a light source, and a lens holding portion that holds a projection lens. The reflecting surface has a first reflecting surface and a second reflecting surface which is located on the opposite side of the light source from the lens holding portion and is formed continuously with the first reflecting surface. The lens holding portion has a holding surface that is orthogonal to the optical axis direction and holds the projection lens. The second reflecting surface is a surface in which the tip of the second reflecting surface is inclined toward the light source with reference to the holding surface.

As described above, since the reflector has the reflecting portion and the lens holding portion integrally, the number of parts can be reduced.

It is a schematic disassembled perspective view which shows the whole structure of the vehicle lighting equipment of Example 1. FIG. It is schematic cross-sectional view which shows the whole structure of the vehicle lighting equipment of Example 1. FIG. FIG. 5 is a schematic cross-sectional view showing the reflector unit of the first embodiment, and is a cross-sectional view taken along the line II of FIG. It is explanatory drawing which shows the inclination of the 2nd reflection surface of Example 1, and is the partially enlarged view of FIG. It is sectional drawing which shows the manufacturing apparatus which manufactures the reflector unit of Example 1. FIG.

Hereinafter, a mode for implementing the vehicle lighting equipment according to the present disclosure will be described based on the first embodiment shown in the drawings.

The vehicle lighting fixture in the first embodiment is applied to a projector-type headlight unit that illuminates the front of a vehicle such as an automobile. Hereinafter, the configuration of the first embodiment will be described separately for the “overall configuration”, the “main part configuration of the reflector unit”, and the “reflector unit manufacturing apparatus”.

The overall configuration will be described with reference to FIGS. 1 and 2.

The vehicle lighting tool 1 has an optical axis adjustment mechanism for the vertical direction and an optical axis adjustment for the left-right direction in a lighting chamber formed by a lamp housing whose open front end is covered with an outer lens on both the left and right sides of the front part of the vehicle. It is provided via a mechanism.

The vehicle lighting fixture 1 includes a light source 2, a heat sink 3 (radiating member), a reflector unit 4 (reflector), a shade unit 5 (shade), a projection lens 6, a light source fixing screw 71, and a unit fixing screw 72 ( It has a screw) and a reflector unit fixing screw 73. In the following description, in the vehicle lamp 1, the direction along the optical axis of the reflector unit 4 and the projection lens 6 is the optical axis direction Z (the projection lens 6 side is the vehicle front side). Further, in the vehicle lighting tool 1, the vertical direction when mounted on the vehicle is defined as the vertical direction Y, and the direction orthogonal to the optical axis direction Z and the vertical direction Y is defined as the vehicle width direction X.

The light source 2 includes a light emitting element 21 (for example, an LED) and a power feeding device 22 (light source holder). The power feeding device 22 has one light source fixing hole 23 on each side of the vehicle width direction X. The light source fixing hole 23 is a hole through which the light source fixing screw 71 can be passed in the same direction (vertical direction Y) when the light source 2 (light emitting element 21) is fixed to the light source fixing surface 31a of the heat sink 3. When the light source 2 is attached to the heat sink 3, the light emitting element 21 such as a light emitting diode is first arranged on the light source fixing surface 31a, and then the power feeding device 22 is fixed to the heat sink 3 by the light source fixing screw 71. In other words, the light source 2 (light emitting element 21) is attached to the light source fixing surface 31a of the heat sink 3. The light source 2 is turned on or off by supplying electric power from the lighting control circuit to the light emitting element 21 via the power feeding device 22. In addition, "LED" is an abbreviation for "Light Emitting Diode".

The heat sink 3 is a heat radiating member that releases heat generated by the light source 2 provided on the upper surface 31 in the vertical direction Y to the outside, and is fixed to the lamp housing. The heat sink 3 is made of heat-conducting aluminum die-cast, resin, or the like. A light source fixing surface 31a is provided on the front side portion of the vehicle among the upper surface 31 of the heat sink 3. The heat sink 3 dissipates heat to the outside from a plurality of heat radiating fins 35 provided on the rear side portion of the vehicle and the lower surface 32 of the heat sink 3 with respect to the light source fixing surface 31a of the upper surface 31 of the heat sink 3. For example, a cooling fan for sending wind is appropriately provided below the heat radiation fin 35 in the vertical direction Y. The heat sink 3 has a first screw hole 36 for fixing the light source fixing screw 71, a second screw hole 37 (screw hole) for fixing the unit fixing screw 72, and a reflector unit fixing, one on each side in the vehicle width direction X. It has a third screw hole 38 for fixing the screw 73. The first screw hole 36 is the light source fixing screw 71, the second screw hole 37 is the unit fixing screw 72, the third screw hole 38 is the reflector unit fixing screw 73, and the light source 2 (light emitting element 21) is on the light source fixing surface 31a. It is a hole that can be passed in the same direction as the mounting direction (vertical direction Y).

The reflector unit 4 reflects the light emitted from the light emitting element 21. The reflector unit 4 has a first unit fixing hole 40a (through hole, first through hole) at an intermediate position in the optical axis direction Z, one on each side in the vehicle width direction X. The first unit fixing hole 40a is a hole through which the unit fixing screw 72 can be passed in the same direction (vertical direction Y) when the light source 2 (light emitting element 21) is attached to the light source fixing surface 31a. The reflector unit 4 is on the rear side of the vehicle in the optical axis direction Z with respect to the first unit fixing hole 40a, and has one reflector unit fixing hole 40b (through hole) on each side of the vehicle width direction X. The reflector unit fixing hole 40b is a hole through which the reflector unit fixing screw 73 can be passed, similarly to the first unit fixing hole 40a. The reflector unit 4 is arranged at a position covering the light source 2 and the heat sink 3, and is fixed to the heat sink 3 by the unit fixing screw 72 and the reflector unit fixing screw 73.

The shade unit 5 switches the light distribution pattern of the projected light projected by the projection lens 6. That is, the shade unit 5 switches the light distribution pattern of the vehicle lighting fixture 1. The light distribution pattern is a low beam light distribution pattern and a high beam light distribution pattern. The shade unit 5 has a second unit fixing hole 50 (through hole, second through hole) on each side of the vehicle width direction X. The second unit fixing hole 50 is a hole through which the unit fixing screw 72 can be passed in the same direction as the vertical direction Y, similarly to the first unit fixing hole 40a. The shade unit 5 is fixed to the heat sink 3 by the unit fixing screw 72. The shade unit 5 includes a bracket 51, a drive unit 52, and a shade body 53. The drive unit 52 is attached to the bracket 51.

The shade body 53 blocks a part of the light emitted from the light emitting element 21 to form a cut-off line of a low beam light distribution pattern. The shade main body 53 has a rotating shaft 54, a plate-shaped rotating base portion 55, and a thin plate-shaped first shade portion 56 and a second shade portion 57. The rotation shaft 54 is inserted into the shaft hole of the rotation base 55. A first shade portion 56 and a second shade portion 57 are attached to the rotation base portion 55. The first shade portion 56 is attached to the upper portion of the rotation base portion 55. The second shade portion 57 is attached to the first shade portion 56 in parallel with the first shade portion 56 at a predetermined interval. The first shade portion 56 and the second shade portion 57 have a shape in which two horizontal edges having different heights are joined by an inclined edge so that their upper edges form a cut-off line.

The shade body 53 is provided on the bracket 51 so as to be rotatable around the rotation shaft 54 by the drive unit 52. In other words, the shade body 53 rotates about the rotation shaft 54 between the rotation posture in which the rotation base 55 is generated and the rotation posture in which the rotation base 55 is lying down. The shade body 53 is arranged so that the upper edges of the first shade portion 56 and the second shade portion 57 are located at or near the focal positions of the reflector unit 4 and the projection lens 6 when the rotation base portion 55 is in the rotational posture. Will be done. Here, the "raised rotational posture" is a rotational posture in which the first shade portion 56 and the second shade portion 57 block a part of the light reaching the projection lens 6. The "sleeping rotational posture" is a rotational posture in which the first shade portion 56 and the second shade portion 57 do not block the light reaching the projection lens 6. That is, the shade body 53 is in the low beam position when the rotation base 55 is in the rotating posture. On the other hand, the shade body 53 is in the high beam position when the rotation base 55 is in the lying rotation posture.

The projection lens 6 projects the light from the light emitting element 21 reflected by the reflector unit 4 toward the front of the vehicle, and forms a light distribution pattern in cooperation with them. The projection lens 6 is held by the reflector unit 4.

The configuration of the main part of the reflector unit 4 will be described with reference to FIGS. 1 to 4.

As shown in FIGS. 1 to 3, the reflector unit 4 has a reflecting portion 41, a lens holding portion 42, and a connecting portion 43. The reflecting portion 41, the lens holding portion 42, and the connecting portion 43 are integrally formed.

As shown in FIGS. 2 and 3, the reflecting unit 41 includes a reflecting surface 41a that reflects the light emitted from the light emitting element 21 on the surface on the light source 2 side. The reflecting surface 41a is formed of a curved surface, and the surface thereof is subjected to a reflection treatment. The reflecting surface 41a is a free curved surface based on an ellipse having the light source 2 (the center position thereof) as the first focal point and the second focal point in the vicinity of the upper edges of the first shade portion 56 and the second shade portion 57. .. The reflecting surface 41a has a first reflecting surface 41b and a second reflecting surface 41c. The first reflecting surface 41b and the second reflecting surface 41c are continuously formed.

The first reflecting surface 41b is a surface of the reflecting surface 41a located on the lens holding portion 42 side, and is a surface that reflects the light emitted from the light emitting element 21 toward the front side of the vehicle. The second reflecting surface 41c is a surface of the reflecting surface 41a located on the side opposite to the lens holding portion 42 side, and the light emitted from the light emitting element 21 is directed to the focal point near the shade unit 5 and the vertical direction Y thereof. It is a surface that reflects upward.

As shown in FIGS. 2 to 4, the second reflecting surface 41c has a tip 41d located on the side of the reflecting surface 41a opposite to the lens holding portion 42 side with reference to the vertical direction Y orthogonal to the optical axis direction Z. Moreover, it is a surface in which the tip 41d of the second reflecting surface 41c is inclined toward the light source 2. Hereinafter, the second reflecting surface 41c will be described in detail with reference to FIG. The plane orthogonal to the optical axis direction Z is designated as the reference plane A, and the reference plane A is the first tangent plane B at the position farthest from the lens holding portion 42 on the reflection plane 41a. The second reflecting surface 41c is a surface below the contact point P between the reference surface A and the reflecting surface 41a in the vertical direction Y, and is a curved surface located closer to the light source 2 than the reference surface A. The "plane in which the tip 41d of the second reflecting surface 41c is inclined toward the light source 2" is the second contact at the position where the angle of the second reflecting surface 41c is the largest with respect to the reference surface A. It is a plane C. The first inclination angle D of the second reflecting surface 41c is an angle between the first tangent plane B and the second tangent plane C. Here, as shown in FIG. 3, the reflecting portion 41 has a cross section based on an elliptical shape, and the elliptical apex, that is, the long axis E connecting the focal points of the ellipse is on the lens holding portion 42 side in the optical axis direction Z. Tilt upward at.

As shown in FIG. 1 and the like, the lens holding portion 42 has an annular shape, and a knurl 45 (concavo-convex portion) is provided on the inner peripheral surface 42c thereof. The lens holding portion 42 has a holding surface 42a and a non-holding surface 42b. The holding surface 42a is a surface that holds the projection lens 6 and is a surface orthogonal to the optical axis direction Z. The projection lens 6 is fixed to the holding surface 42a by welding or adhesion. The non-holding surface 42b is a surface opposite to the holding surface 42a in the optical axis direction Z. The second tilt angle F of the non-holding surface 42b is set to be equal to or higher than the first tilt angle D of the second reflecting surface 41c on the reflecting portion 41 side with respect to the holding surface 42a. For example, the second inclination angle F of the non-holding surface 42b is inclined by 1 to 10 degrees (for example, 2 degrees) with respect to the holding surface 42a with respect to the first inclination angle D of the second reflection surface 41c.

The connecting portion 43 is arranged between the reflecting portion 41 and the lens holding portion 42. The connecting portion 43 has an opening 43a. The opening 43a is formed on the upper side of the connecting portion 43 in the vertical direction Y. A knurl 45 (concavo-convex portion) is provided on the inner surface 43b of the connecting portion 43 on the light source 2 side.

The knurl 45 is a member provided to prevent an unintended light distribution pattern from being formed, and scatters light.

The manufacturing apparatus of the reflector unit 4 will be described with reference to FIGS. 3 and 5.

The reflector unit 4 is manufactured by the manufacturing apparatus 8. The manufacturing apparatus 8 is used in the resin injection molding method. The manufacturing apparatus 8 has a mold 9.

The mold 9 forms a molten resin material in the cavity space. The mold 9 has a fixed mold 91a fixed to the fixed frame 91, a movable mold 92a fixed to the movable frame 92, and a slide mold 93. The mold 9 is appropriately provided with a gas vent hole for venting gas. Here, the cavity space is a space created by the fixed mold 91a, the movable mold 92a, and the sliding mold 93 by the mold clamping of the mold 9.

The fixed-side cavity 91b of the fixed mold 91a refers to an engraved surface corresponding to the upper portion of the reflector unit 4 of the fixed mold 91a and the opening 43a of the connecting portion 43. The fixed frame 91 is appropriately provided with a casting port, and the fixed mold 91a is appropriately provided with a sprue for connecting the casting port and the fixed-side cavity 91b.

The movable frame 92 is provided so as to be reciprocally movable in the direction in which the non-holding surface 42b extends together with the movable type 92a. Here, the "direction in which the non-holding surface 42b extends" coincides with the movable direction M, which is the vertical direction at the time of manufacture, and does not coincide with the vertical direction Y. The movement of the movable frame 92 is performed by the hydraulic cylinder, and the hydraulic cylinder is controlled by the movable frame controller. The movable side cavity 92b of the movable type 92a refers to an engraved surface (space) mainly corresponding to the reflective surface 41a of the movable type 92a, the inner surface 43b portion below the opening 43a of the connecting portion 43, and the non-holding surface 42b.

The slide type 93 is provided so as to be slidable in the slide direction S. Here, the "slide direction S" is a direction (optical axis direction Z) that is not orthogonal to the movable direction M but is orthogonal to the holding surface 42a to be formed, and is horizontal that intersects the movable direction M and the movable direction M. It is in the angular direction with the direction H (the direction of the long axis E of the ellipse in FIG. 3). The movement of the slide type 93 is performed by the hydraulic cylinder, and the hydraulic cylinder is controlled by the slide type controller. The slide-side cavity 93b of the slide type 93 mainly refers to an engraved surface (space) corresponding to the annular inner peripheral surface 42c and the holding surface 42a of the lens holding portion 42 of the slide type 93.

Next, the operation of Example 1 will be described. Hereinafter, the action of Example 1 will be described separately by dividing it into "operation action of the resin injection molding method (manufacturing method)", "mounting action", and "characteristic action of the vehicle lamp 1".

The operation and operation of the resin injection molding method will be described with reference to FIGS. 3 and 5.

First, the slide type 93 is moved in the sliding direction S toward the fixed type 91a and the movable type 92a in the open state of the fixed type 91a and the movable type 92a or the mold tightening state of the fixed type 91a and the movable type 92a. The slide type 93 is arranged on the movable type 92a (slide type arrangement step). Next, after the slide mold is arranged and the mold is open, the movable frame 92 is moved downward in the movable direction M, and the movable mold 92a is molded into the fixed mold 91a (mold clamping step).

Next, after the slide mold is arranged or the mold is fastened, the molten resin material is filled into the cavity space from the casting port through the sprue, and the resin material is cooled (filling cooling step). When filling the resin material, the resin material at the casting port is pushed into the sprue by the casting piston. As a result, the resin material (press-fitted resin material) pressurized from the sprue is filled (injected) into the cavity space. Next, after filling and cooling, the slide mold 93 is moved in a direction away from the fixed mold 91a and the movable mold 92a in the slide direction S, and the slide mold 93 is removed from the fixed mold 91a and the movable mold 92a (slide mold removal step). Subsequently, after the slide mold 93 is removed, the movable frame 92 is moved upward in the movable direction M, and the movable mold 92a is mold-opened from the fixed mold 91a (mold opening step). Then, after the mold 9 is opened, the reflector unit 4 which is a molded product is taken out (molded product taking-out step).

In this way, the reflector unit 4 is formed by the mold 9. Further, one movable type 92a continuously forms the first reflecting surface 41b and the second reflecting surface 41c. The inclination of the holes of the first unit fixing hole 40a and the reflector unit fixing hole 40b is formed so as to coincide with the movable direction M.

For example, when molding only a reflector having two reflecting surfaces having different light distribution functions by reflection, the two reflecting surfaces are molded by one movable mold (hereinafter, referred to as "one mold"). It is assumed that the two reflecting surfaces are designed to be continuous as in the first embodiment or discontinuous as in the conventional vehicle headlights. Further, at the time of manufacturing, the direction of the optical axis is the same as the direction of FIG. In this case, if the moving direction for removing one mold is set to the optical axis direction, the two reflecting surfaces can be molded with one mold.

On the other hand, for example, in a conventional headlight for a vehicle, in addition to the first reflector and the second reflector, a support member for supporting the projection lens is separately configured. Therefore, in order to reduce the number of parts, a reflector having two reflecting surfaces having different light distribution functions by reflection and a lens holding portion (support member) are integrally molded. When molding in this way, the two reflecting surfaces are molded in one mold. It is assumed that the two reflecting surfaces are designed in the same manner as in the case of molding only the reflector. In this case, it is necessary to consider the moving direction of one mold and the moving direction of the mold for forming the holding surface on which the lens of the lens holding portion is attached. Here, the holding surface of the lens holding portion to which the lens is attached needs to be formed into a surface orthogonal to the optical axis direction. Therefore, since one mold cannot be moved to the lens holding portion side in the optical axis direction, one mold is moved in the vertical direction orthogonal to the optical axis direction. Then, when the mold is moved in the vertical direction in order to remove the mold, the movement of the mold makes it impossible to form the second reflecting surface of the two reflecting surfaces. The entire reflecting surface of the reflector has a cross section based on an elliptical shape, and when the long axis of the ellipse is tilted downward on the lens holding portion side parallel to the optical axis direction or in the optical axis direction, one is used. Even if the mold is moved in the vertical direction, two reflective surfaces can be formed with one mold.

On the other hand, in the first embodiment, the second reflecting surface 41c has the tip 41d of the second reflecting surface 41c closer to the light source 2 with the holding surface 42a orthogonal to the optical axis direction Z (sliding direction S) as a reference. It is an inclined surface. Further, the second inclination angle F of the non-holding surface 42b is set to be equal to or higher than the first inclination angle D of the second reflection surface 41c on the reflection portion 41 side with the holding surface 42a as a reference. Therefore, the moving direction of the movable type 92a can be set to the movable direction M (the direction in which the non-holding surface 42b extends). That is, when the mold is opened, the movable mold 92a is moved in the same direction as the movable direction M, so that the first reflecting surface 41b and the second reflecting surface 41c are continuously formed. In other words, when the mold is opened, the movable mold 92a is moved in the movable direction M which is not orthogonal to the optical axis direction Z, so that the second reflecting surface 41c can be formed even if the movable mold 92a moves. Therefore, when the reflecting portion 41 and the lens holding portion 42 are integrally molded, the first reflecting surface 41b and the second reflecting surface 41c are molded by one movable mold 92a. Therefore, when the reflecting surface 41a is formed by one movable type 92a, the degree of freedom in designing the second reflecting surface 41c can be increased.

The mounting action will be described with reference to FIG.

At least the light source 2, the reflector unit 4, and the shade unit 5 are fixed to the heat sink 3. First, the heat sink 3 is fixed to the jig. After that, the light emitting element 21 is fixed to the heat sink 3 from the upper side in the vertical direction Y to the light source fixing surface 31a. Next, the power feeding device 22 is arranged on the heat sink 3 with its opening aligned with the position of the light emitting element 21 in the vertical direction Y. Next, the light source fixing hole 23 and the first screw hole 36 are matched. After that, the light source fixing screw 71 is passed from the upper side in the vertical direction Y in the matched state. Then, the power feeding device 22 is fixed to the heat sink 3 by the light source fixing screw 71.

Subsequently, the shade unit 5 is arranged on the heat sink 3 from the upper side in the vertical direction Y, and then the reflector unit 4 on which the projection lens 6 is held is arranged. Next, the second screw hole 37, the first unit fixing hole 40a, and the second unit fixing hole 50 are matched. After that, the unit fixing screw 72 is passed from the upper side in the vertical direction Y in the matched state. Then, the reflector unit 4 and the shade unit 5 are fixed to the heat sink 3 by the unit fixing screw 72.

Next, the third screw hole 38 and the reflector unit fixing hole 40b are matched. After that, the reflector unit fixing screw 73 is passed from the upper side in the vertical direction Y in the matched state. Then, the reflector unit 4 is securely fixed to the heat sink 3 by the unit fixing screw 72 and the reflector unit fixing screw 73. Although the holes of the first unit fixing hole 40a and the reflector unit fixing hole 40b are inclined from the vertical direction Y, the fixing screws 72 and 73 can be passed from the upper side in the vertical direction Y.

In this way, the arrangement directions of the light source 2, the reflector unit 4, and the shade unit 5 on the heat sink 3 and the directions in which the fixing screws 71, 72, and 73 are passed can be unified in the same direction. In other words, after fixing the heat sink 3 with a jig, a plurality of members (light source 2, reflector unit 4, and shade unit 5) are unidirectionally attached to the heat sink 3 without fixing the heat sink 3 with another jig. It is attached.

For example, in a conventional headlight for a vehicle, when attaching a first reflector, a second reflector, a power feeding device for a light source, or the like to a support member, the headlights must be attached from a plurality of directions, which complicates the attachment work.

On the other hand, in the first embodiment, a plurality of members are attached to the heat sink 3 in one direction. Therefore, the light source 2, the reflector unit 4, and the shade unit 5 are easily attached to the heat sink 3. In addition, the unit fixing screw 72 can be used together for fixing the reflector unit 4 and the shade unit 5. Then, the reflector unit 4 and the shade unit 5 are attached to the heat sink 3 by the common unit fixing screw 72.

The characteristic action of the vehicle lighting tool 1 will be described with reference to FIGS. 1 to 4.

For example, in a conventional headlight for a vehicle, in addition to the first reflector and the second reflector, a support member for supporting the projection lens is separately configured. Therefore, there is a problem that the number of parts of the headlight for a vehicle increases.

On the other hand, as shown in FIG. 3, the reflector unit 4 of the first embodiment has a reflecting portion 41 having a first reflecting surface 41b and a second reflecting surface 41c, and a lens holding portion 42 holding the projection lens 6. Have one. Therefore, the number of parts can be reduced as compared with the conventional headlights for vehicles.

In addition, in the first embodiment, as shown in FIGS. 2 to 4, the second reflecting surface 41c uses the tip 41d of the second reflecting surface 41c as a light source 2 with reference to the holding surface 42a orthogonal to the optical axis direction Z. It is a surface inclined toward the side approaching. Therefore, the long axis E of the ellipse in the reflecting portion 41 is tilted upward on the lens holding portion 42 side in the optical axis direction Z.

Here, the more the reflecting surface 41a closer to the light emitting element 21, the more light flux from the light emitting element 21 is incident. Then, in the first embodiment, since the long axis E of the ellipse is tilted upward on the lens holding portion 42 side in the optical axis direction Z, it is closer to the light emitting element 21 as compared with the case where the long axis of the ellipse is not tilted. The area of the reflecting surface 41a (particularly the second reflecting surface 41c) can be increased. Therefore, the luminous flux from the light emitting element 21 can be effectively utilized as compared with the case where the long axis of the ellipse is not tilted. Therefore, the loss of the luminous flux from the light emitting element 21 can be suppressed.

In the first embodiment, as shown in FIG. 3 and the like, the reflector unit 4 integrally has a connecting portion 43 between the reflecting portion 41 and the lens holding portion 42. That is, the distance between the reflecting portion 41 and the lens holding portion 42 can be adjusted by the connecting portion 43. Therefore, the light distribution due to the reflection of the reflecting surface 41a can be adjusted. In addition, even if the connecting portion 43 is additionally provided, the reflector unit 4 can be integrally formed by setting the second inclination angle F of the non-holding surface 42b. Therefore, the length of the connecting portion 43 in the optical axis direction Z can be adjusted.

In the first embodiment, the connecting portion 43 has an opening 43a on the upper side in the vertical direction Y. The heat generated by the light source 2 rises upward in the vertical direction Y in the reflector unit 4. Therefore, the heat in the reflector unit 4 can be released to the outside.

As described above, in the vehicle lighting tool 1 of the first embodiment, the effects listed below can be obtained.

(1) It has a light source 2, a reflector (reflector unit 4) that reflects the light emitted from the light source 2, and a projection lens 6 that projects the light reflected by the reflector (reflector unit 4) in the optical axis direction Z. .. In the vehicle lamp 1, the reflector (reflector unit 4) integrally includes a reflecting portion 41 having a reflecting surface 41a that reflects light emitted from the light source 2 and a lens holding portion 42 that holds the projection lens 6. .. The reflecting surface 41a has a first reflecting surface 41b and a second reflecting surface 41c located on the opposite side of the light source 2 from the lens holding portion 42 and formed continuously with the first reflecting surface 41b. The lens holding portion 42 has a holding surface 42a that is orthogonal to the optical axis direction Z and holds the projection lens 6. The second reflecting surface 41c is a surface (second tangent plane C) in which the tip 41d of the second reflecting surface 41c is inclined toward the light source 2 with reference to the holding surface 42a. Therefore, it is possible to provide a vehicle lighting tool 1 that reduces the number of parts. In addition, the loss of the luminous flux from the light emitting element 21 can be suppressed.

(2) The lens holding portion 42 has a holding surface 42a and a non-holding surface 42b which is a surface opposite to the holding surface 42a in the optical axis direction Z. The angle of the non-holding surface 42b (second tilt angle F) is set to be equal to or higher than the tilt angle of the second reflecting surface 41c (first tilt angle D) on the reflecting portion 41 side with reference to the holding surface 42a. Therefore, when the reflecting portion 41 and the lens holding portion 42 are integrally molded, the first reflecting surface 41b and the second reflecting surface 41c can be molded by one movable mold 92a.

(3) The reflector (reflector unit 4) integrally has a connecting portion 43 between the reflecting portion 41 and the lens holding portion 42. Therefore, the light distribution due to the reflection of the reflecting surface 41a can be adjusted.

(4) The connecting portion 43 has an opening 43a. Therefore, the heat in the reflector (reflector unit 4) can be released to the outside.

(5) The vehicle lamp 1 has a heat radiating member (heat sink 3) that dissipates heat generated by the light source 2 and a screw (unit fixing screw 72). The heat radiating member (heat sink 3) has a fixing surface (light source fixing surface 31a) of the light source 2 (light emitting element 21) and a screw hole (second screw hole 37) for fixing a screw (unit fixing screw 72). The reflector (reflector unit 4) can be threaded with screws (unit fixing screw 72) in the same direction (vertical direction Y) when the light source 2 (light emitting element 21) is attached to the fixed surface (light source fixing surface 31a). It has a through hole (first unit fixing hole 40a). Therefore, the light source 2 and the reflector (reflector unit 4) can be easily attached to the heat radiating member (heat sink 3).

(6) The vehicle lamp 1 has a shade (shade unit 5) that blocks a part of the light emitted from the light source 2. The through hole is referred to as a first through hole (first unit fixing hole 40a). The shade (shade unit 5) can be threaded with screws (unit fixing screw 72) in the same direction (vertical direction Y) when the light source 2 (light emitting element 21) is attached to the fixed surface (light source fixing surface 31a). It has a second through hole (second unit fixing hole 50). Therefore, the reflector unit 4 and the shade (shade unit 5) can be attached to the heat radiating member (heat sink 3) by using a common screw (unit fixing screw 72). In addition, the light source 2, the reflector (reflector unit 4), and the shade (shade unit 5) can be easily attached to the heat radiating member (heat sink 3).

Although the vehicle lighting equipment 1 of the present disclosure has been described based on the first embodiment, the specific configuration is not limited to this embodiment, and the gist of the invention according to each claim of the claims. Design changes and additions are permitted as long as they do not deviate from.

In Example 1, an example in which the reflector unit 4 has a connecting portion 43 is shown. However, it is not limited to this. For example, the reflector unit does not have to have a connecting portion, and the length of the lens holding portion in the optical axis direction may be increased instead of the connecting portion.

In Example 1, an example is shown in which the opening 43a is formed above the connecting portion 43 in the vertical direction Y. However, it is not limited to this. For example, the openings may be formed on both or one of the right side and the left side of the connecting portion in the vehicle width direction. The opening may not be formed in the connecting portion.

In the first embodiment, an example in which the light emitting element 21 is arranged on the light source fixing surface 31a is shown. However, it is not limited to this. For example, the light emitting element may be mounted on the substrate, and the power feeding device (light source) may be configured to sandwich the substrate from the upper side in the vertical direction and arrange the light emitting element on the fixed surface (light source fixed surface).

In Example 1, an example was shown in which the manufacturing apparatus and manufacturing method of the reflector unit 4 were the manufacturing apparatus 8 and the (resin) injection molding method. However, it is not limited to this. For example, the manufacturing apparatus and manufacturing method of the reflector unit may be a gravitational pressure casting apparatus and casting method. In short, the reflector unit manufacturing apparatus and manufacturing method may be those manufactured by casting.

In Example 1, an example was shown in which the material for molding the reflector unit 4 was a resin material. However, it is not limited to this. For example, the material for molding the reflector unit 4 may be a metal material. When a metal material is used, the reflector unit manufacturing apparatus and manufacturing method may be injection molding as in the first embodiment, or may be pressure casting by gravity.

In the first embodiment, an example is shown in which the vehicle lighting device 1 of the present disclosure is applied to a projector-type headlight unit that illuminates the front of a vehicle such as an automobile. However, the vehicle lamp 1 of the present disclosure is another vehicle lamp used for a vehicle as long as it is a vehicle lamp including a light source, a reflector having a reflecting portion and a lens holding portion integrally, and a projection lens. You may.

1 Vehicle lighting equipment 2 Light source 3 Heat sink (heat dissipation member)
31a Light source fixed surface (fixed surface)
37 Second screw hole (screw hole)
4 Reflector unit (reflector)
40a 1st unit fixing hole (through hole, 1st through hole)
41 Reflecting part 41a Reflecting surface 41b First reflecting surface 41c Second reflecting surface 41d Tip 42 Lens holding part 42a Holding surface 42b Non-holding surface 43 Connecting part 43a Opening 5 Shade unit (shade)
50 2nd unit fixing hole (2nd through hole)
6 Projection lens 72 Unit fixing screw (screw)
D First tilt angle (tilt angle of the second reflecting surface 41c)
F Second tilt angle (angle of non-holding surface)

Claims (6)

In a vehicle lamp having a light source, a reflector that reflects the light emitted from the light source, and a projection lens that projects the light reflected by the reflector in the optical axis direction.
The reflector integrally includes a reflecting portion having a reflecting surface that reflects light emitted from the light source, and a lens holding portion that holds the projection lens.
The reflecting surface has a first reflecting surface and a second reflecting surface located on the side opposite to the lens holding portion from the light source and formed continuously with the first reflecting surface.
The lens holding portion has a holding surface that is orthogonal to the optical axis direction and holds the projection lens.
The second reflecting surface is a surface in which the tip of the second reflecting surface is inclined toward the light source with reference to the holding surface. In the vehicle lighting equipment according to claim 1,
The lens holding portion has a holding surface and a non-holding surface which is a surface opposite to the holding surface in the optical axis direction.
A vehicle lighting tool characterized in that the angle of the non-holding surface is set to be equal to or greater than the inclination angle of the second reflecting surface on the reflecting portion side with reference to the holding surface. In the vehicle lighting equipment according to claim 1 or 2.
The reflector is a vehicle lamp that integrally has a connecting portion between the reflecting portion and the lens holding portion. In the vehicle lighting equipment according to claim 3.
The connecting portion is a vehicle lamp having an opening. In the vehicle lighting equipment according to any one of claims 1 to 4.
It has a heat radiating member that dissipates heat generated by the light source and a screw.
The heat radiating member has a fixing surface of the light source and a screw hole for fixing the screw.
The reflector is a vehicle lamp having a through hole through which the screw can be passed in the same direction as when the light source is attached to the fixed surface. In the vehicle lighting equipment according to claim 5.
It has a shade that blocks a part of the light emitted from the light source.
The shade is a vehicle lighting tool having a second through hole through which the screw can be passed in the same direction when the through hole is used as the first through hole.