JPH0575906U - Vehicle lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] It is intended to provide a vehicular lamp capable of effectively utilizing the invalid light from the light source bulb 4. The auxiliary reflector 5 that effectively uses the ineffective light from the light source bulb 4 is provided in the lamp chamber 22 and
Provide it in a place where it does not block the reflected light from. As a result, the ineffective light from the light source bulb 4 can be reflected by the auxiliary reflector 5 and used effectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicular lamp, for example, a vehicular lamp such as a headlamp having a large wraparound portion of a lens with respect to the optical axis, and particularly effective use of invalid light from a light source bulb, for example, a headlamp having a large wraparound portion. In the above, the invention relates to a vehicular lamp that can effectively utilize by irradiating the ineffective light from the light source bulb to the front left and right sides of the vehicle.

[0002]

[Prior Art]

 Hereinafter, a conventional vehicular lamp of this type will be described with reference to FIGS. 6 and 7. In this example, a headlamp having a large wraparound portion of the lens with respect to the optical axis, which is mounted on the left side of the automobile (the left side when looking forward from the driver's seat) will be described. In the figure, 1 is a housing made of synthetic resin, for example. The housing 1 has openings 10 and 11 at the front and the rear, respectively. Adhesive recesses 12 are provided on the entire periphery of the front opening 10 of the housing 1. The depth of the left side of this housing 1 (which corresponds to the outside of the vehicle when it is installed in the vehicle) is shallow due to the wraparound portion. 2 is a lens. This lens 2 has a shape with an open rear portion. Adhesive legs 20 are provided on the entire periphery of the rear opening of the lens 2. A wrap-around portion 21 is provided at the end of the lens 2, for example, the left end. The adhesive leg portion 20 of the lens 2 is attached to the front opening portion 10 of the housing 1 by adhesive sealing with, for example, hot melt 23. As a result, the lamp chamber 22 defined by the housing 1 and the lens 2 is formed. 3 is a reflector. The reflector 3 has a front opening, and a reflection surface 30 of, for example, a paraboloid of revolution is provided on the front surface side (inner surface side) thereof by, for example, aluminum vapor deposition. Further, this reflector 3 is provided with a through hole 31 at the rear portion thereof, and a light source bulb attachment 33 is provided at the periphery of the through hole 31. The reflector 3 is rotatably attached to the housing 1 by a pivot bearing mechanism or the like (not shown). As a result, the reflector 3 is rotatably housed in the lamp chamber 22. In the figure, reference numeral 32 denotes an edge of the front opening of the reflecting surface 30 of the reflector 3, which is a flange portion integrally provided on the left edge. Aluminum is vapor-deposited on the surface of the flange portion 32. The flange portion 32 is a dummy of the reflecting surface 30 of the reflector 3. That is, when such a headlamp is viewed from the front, if the above-mentioned flange portion 32 is not present, a gap is created between the left end of the reflector 3 and the housing 1, and the interior of the lamp chamber 20 is passed through the lens 2 and inside. Although the mounting portion of the lamp chamber 20 is visible, the flange portion 32 closes the gap between the left end of the reflector 3 and the housing 1 to cover the mounting portion and the like in the interior of the lamp chamber 20. The reflecting surface 30 of the reflector 3 is camouflaged as if it were fully left in the lamp chamber 20. A light source bulb 4 is, for example, an H4 type bulb. The light source bulb 4 includes a glass tube 40, a main filament 43 and a sub-filament 44 arranged in the glass tube 40, and a light-shielding body (not shown) arranged below the sub-filament 44. A light-shielding film 45 (not shown) provided on the front end of the glass tube 40, a base 41 integrally provided from the rear of the glass tube 40, and an intermediate part of the base 41. It comprises a flange 42 and a terminal (not shown) protruding from the rear of the base 41. The light source bulb 4 is inserted from the rear through hole 31 of the reflector 3 to the front reflection surface 30 side of the reflector 3, and the flange portion 42 of the light source bulb 4 is brought into contact with the peripheral edge of the through hole 31 of the reflector 3 to make the reflector 3 The light source bulb 4 is removably attached to the reflector 3 with the attachment of. As a result, the light source bulb 4 is disposed on the front surface side of the reflector 3, and the main filament 43 and the sub-filament 44 of the light source bulb 4 serve as the central axis of rotation (optical axis ZZ) of the reflecting surface 30 of the reflector 3. The main filaments 43 are located parallel to each other, and the main filament 43 is located near the focal point F of the reflecting surface 30 of the reflector 3. Reference numeral 46 denotes an attachment cap detachably attached to the rear opening 11 of the housing 1. Although the left headlamp has been described in the above description, the right headlamp is symmetrical to the left headlamp described above. The left headlamp and the right headlamp are installed on the left and right sides of the front of the vehicle. Thus, when, for example, the sub-filament 44 among the light source bulbs 4 of the left and right headlamps is turned on, the light from the light source bulb 4 is reflected by the reflecting surface 30 of the reflector 3 and the reflected light passes through the lens 2. , A predetermined light distribution pattern P 1, for example, a light distribution pattern P for passing light as shown in FIG. In FIG. 7, V-V is a vertical line on the screen and H-H is a horizontal line on the screen. Since this light distribution pattern P is for passing, the oncoming lane is on the right side of the vertical line V-V, so that light upward from the horizontal line H-H is irradiated so as not to dazzle the oncoming vehicle. It is configured not to.

[0003]

[Problems to be solved by the device]

 However, in the above-described conventional headlamp, the light source bulb 4 and the reflector 3 for reflecting the light from the light source bulb 4 to the lens 2 side are provided in the lamp chamber 22 defined by the lens 2 and the housing 1. Is simply arranged. Therefore, the ineffective light from the light source bulb 4 (that is, the light from the light source bulb 4 other than the effective light that is reflected by the reflection surface 30 of the reflector 3 and is irradiated to the lens 2 side) There is no means to effectively use the direct light of the). Therefore, there is a problem that the invalid light from the light source bulb 4 cannot be effectively used.

An object of the present invention is to provide a vehicular lamp that can effectively use the ineffective light from the light source bulb.

[0005]

[Means for Solving the Problems]

 The present invention is characterized in that an auxiliary reflector for effectively utilizing the invalid light from the light source bulb is provided in the lamp chamber at a position where the reflected light from the reflector is not blocked.

[0006]

According to the present invention, with the above-described configuration, the ineffective light from the light source bulb can be reflected by the auxiliary reflector and can be effectively used.

[0007]

【Example】

 Hereinafter, two examples of embodiments of the vehicular lamp of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a cross-sectional view showing a first embodiment of a vehicular lamp of the present invention, FIG. 2 is a view on arrow II in FIG. 1, FIG. 3 is a view on arrow III in FIG. 2, and FIG. It is a light pattern. In this example, a headlamp having a large lens wraparound portion with respect to the optical axis, which is mounted on the left side of the automobile (the left side when looking forward from the driver's seat) will be described. In the figure, the same reference numerals as those in FIGS. 6 and 7 indicate the same components. In the figure, 5 is an auxiliary reflector. As shown in FIG. 2, the auxiliary reflector 5 has a substantially U-shape when viewed from the front, and has a size substantially equal to the size of the rear through hole 31 of the reflector 3. That is, the length of one side of the reflector 5 (the reflecting surface plate portion 50 and the upper and lower light shielding plate portions 51 described later) is made substantially equal to the outer diameter of the rear through hole 31 of the reflector 3. Further, the auxiliary reflector 5 has a reflecting surface plate portion 50, a light shielding plate portion 51 bent substantially at right angles from both upper and lower edges of the reflecting surface plate portion 50 and extending in parallel, and one end thereof is fixed to the lower light shielding plate portion 51. The stay 52 has an L-shape from the side surface and a special curved diffuse reflection surface 53 provided on the inner surface of the reflection plate portion 50. The other end of the stay 52 of the auxiliary reflector 5 is attached to the edge of the rear through hole 31 of the reflector 3 with a screw 54. The axis of the auxiliary reflector 5 (the optical axis of the diffuse reflection surface 53) Z′-Z ′ of the auxiliary reflector 5 is θ ° (about 20 ° to 60 °) to the left with respect to the optical axis ZZ of the reflector 3. Range) and the focal point (focus point of the diffuse reflection surface 53) F'of the auxiliary reflector 5 is located near the sub-filament 44 of the light source bulb 4, and the reflection surface plate portion 50 and the diffuse reflection surface 53 are on the right side. The stay 52 is located on the lower side, and the auxiliary reflector 5 is attached to the reflector 3 so that the auxiliary reflector 5 does not block the reflected light from the reflector 3 as much as possible. As shown by the solid line in FIG. 1, the diffuse reflection surface 53 diffuses and reflects the direct light (ineffective light) from the sub-filament 44 of the light source bulb 4 to the left in the horizontal direction. It is a single continuous curved surface whose direction changes continuously with respect to the horizontal direction. Although the left headlamp has been described in the above-described embodiment, the right headlamp is symmetrical to the left headlamp described above. The left headlamp and the right headlamp are mounted on the left and right sides of the front of the vehicle.

The vehicular lamp of the present invention in this embodiment has the above-mentioned structure, and its operation will be described below. First, when the sub-filament 44 of the light source bulb 4 is turned on, the light from the sub-filament 44 of the light source bulb 4 is reflected by the reflecting surface 30 of the reflector 3, and the reflected light is transmitted through the lens 2, for example, in FIG. The light is radiated to the outside with a predetermined light distribution pattern P for passing each other as shown by a solid line. At this time, as shown in FIG. 2, most of the auxiliary reflector 5 is located in the rear through hole 31 of the reflector 3 as viewed from the front, and is configured so as not to block the reflected light from the reflector 3 as much as possible. However, there is no fear of adversely affecting the light distribution pattern P for passing by the reflected light from the reflector 3 described above. On the other hand, a part of the direct light from the sub-filament 44 of the light source bulb 4, that is, the ineffective light is diffusely reflected by the diffuse reflection surface 53 of the auxiliary reflector 5 as shown by the solid line in FIG. The light is diffused to the left in the direction and is irradiated to the outside through the lens 2. That is, as shown in FIG. 4, the light distribution pattern P for passing the solid line is irradiated as an auxiliary light distribution pattern LP on the left side of the broken line. The auxiliary light distribution pattern RP indicated by the broken line on the right side is illuminated by the right headlamp which is symmetrical with respect to the left headlamp in the above-described embodiment. In this way, the ineffective light from the sub-filament 44 of the light source bulb 4 can be effectively used. For example, as in this embodiment, when the wrap portion 21 of the lens 2 is large with respect to the optical axis Z-Z of the headlamp, the auxiliary light distribution pattern is provided on both left and right sides of the light distribution pattern P for passing. LP and RP are illuminated. As a result, it is possible to sufficiently illuminate the side of the vehicle at the time of cornering. Moreover, it is possible to use the auxiliary reflector 5 only to use the auxiliary reflector 5 instead of using the separate side illumination lamps for compensating the left and right non-illuminated parts of the ordinary headlamp light distribution pattern. Since it can be illuminated, the number of parts and cost can be reduced.

FIG. 5 is a cross-sectional view showing a second embodiment of the vehicular lamp of the present invention. This example describes an example of a headlamp similar to the example of the first embodiment described above. In the drawings, the same reference numerals as those in FIGS. 1 to 4, 6 and 7 indicate the same parts. In the figure, reference numeral 55 denotes a light diffusing element provided on the inner surface of the reflecting surface plate portion 50 of the auxiliary reflector 5. The light diffusing element 55 diffuses and reflects the direct light from the sub-filament 44 of the light source bulb 4, that is, the ineffective light, to the left in the horizontal direction. The vehicular lamp according to the second embodiment can achieve the same effects as the above-described first lamp.

Although the headlamp having a large wraparound portion with respect to the optical axis has been described in the above embodiment, the present invention can be applied to other vehicle lamps. Further, in the above-described embodiment, as the light source bulb 4, the H4 type bulb in which the longitudinal direction of the main filament 43 and the sub filament 44 is positioned parallel to the optical axis ZZ is used, but other light source bulbs are used. You may use it. For example, a valve with a single filament whose longitudinal direction is parallel to the optical axis. A valve with a single filament, the longitudinal direction of which is perpendicular to the optical axis. In addition, the bulb is a double filament with the longitudinal direction of the double filament perpendicular to the optical axis.

[0011]

[Effect of the device]

 As is clear from the above, the vehicular lamp of the present invention is provided with the auxiliary reflector that effectively uses the ineffective light from the light source bulb in the lamp room at a position where the reflected light from the reflector is not blocked. Therefore, the ineffective light from the light source bulb can be effectively reflected by the auxiliary reflector.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a vehicular lamp of the present invention.

FIG. 2 is a view taken along the line II in FIG.

FIG. 3 is a view taken along the line III in FIG.

FIG. 4 is an explanatory view of a light distribution pattern for passing each other by the vehicular lamp of the present invention.

FIG. 5 is a cross-sectional view showing a second embodiment of the vehicular lamp of the present invention.

FIG. 6 is a cross-sectional view showing a conventional vehicle lamp.

FIG. 7 is an explanatory view of a light distribution pattern for passing light by a conventional vehicle lamp.

[Explanation of symbols]

1 ... Housing, 2 ... Lens, 21 ... Wrapping part, 22
... Lamp room, 3 ... Reflector, 30 ... Reflecting surface, 31 ... Rear through hole, 32 ... Flange part, 4 ... Light source bulb, 43 ... Main filament, 44 ... Sub filament, 5 ... Auxiliary reflector, 52 ... Stay, 53 ... Diffuse reflection surface, 54 ... Screw, 55 ... Light diffusing element, F ... Focus of reflection surface of reflector, F ′ ... Focus of diffusion reflection surface of auxiliary reflector, ZZ
... optic axis of reflecting surface of reflector, Z'-Z '... optic axis of diffuse reflecting surface of auxiliary reflector, P ... light distribution pattern for passing, LP ... Illuminated by diffuse reflecting surface of auxiliary reflector of left headlamp Light distribution pattern, RP ... The light distribution pattern illuminated by the diffuse reflection surface of the auxiliary reflector of the right headlamp.

Claims (1)

[Scope of utility model registration request] 1. A vehicular lamp including a lens and a housing defining a lamp chamber, a light source bulb disposed in the lamp chamber, and a reflector for reflecting light from the light source bulb toward the lens side. A vehicular lamp, wherein an auxiliary reflector that effectively uses the invalid light from the light source bulb is provided in a position in the lamp chamber that does not block reflected light from the reflector.