JPH1040705A - Head lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure efficient use of light of a light source bulb and reduction of the number of part items and assembling man-hours. SOLUTION: A sub-reflector 80 utilized by reflecting light advancing to a portion other than the main reflector 5 in the light from a light source bulb 4 is used. Thus, the light advancing to the portion other than the main reflector 5 in the light from filaments 40 and 41 of the light source bulb 4 is efficiently used, therefore, a range to be efficiently utilized for external irradiation can be widened. In addition, by integrally fixing the sub-reflector 80 and a shade 6 with each other, the number of part items and the number of assembling man-hours can be reduced irrespective of using the sub-reflector 80.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular headlamp such as a fog lamp or a headlamp, which is capable of direct light traveling directly to a lens without interrupting light traveling from a light source bulb to a main reflector. The present invention relates to vehicle headlamps such as fog lamps and headlamps that can block glare light and effectively use light that travels to other than the main reflector among the light from the light source bulb, and in particular, further effectively use the light from the light source bulb. The present invention relates to a vehicle headlamp capable of reducing the number of parts and the number of assembly steps.

[0002]

2. Description of the Related Art A conventional vehicle headlamp of this type will be described below with reference to FIGS. This example describes a reflector movable type vehicle headlamp. In the figure, reference numeral 1 denotes a lamp housing made of, for example, a synthetic resin. Openings 10 and 11 are provided at the front and rear of the lamp housing 1, respectively. The front opening 10 is provided with a seal recess 12.

In FIG. 1, reference numeral 2 denotes a lens made of synthetic resin or glass. The lens 2 has a dish shape, and a seal leg 20 is provided integrally around the entire opening. The sealing leg 20 of the lens 2 is
Is sealed by a hot melt or the like 21 in the sealing recess 12 of the lamp, and the lamp chamber 14 is defined. A prism element group (not shown) that refracts and diffuses reflected light from the main reflector 5 described later is provided on the inner surface of the lens 2.

In FIG. 1, reference numeral 3 denotes a movable reflector.
The movable reflector 3 is made of, for example, a thermosetting resin (BM).
C) and the like. The movable reflector 3 is provided in the light room 1
4, a pivot bearing or the like (not shown) is provided to be rotatable and tiltable. On the front and rear of the movable reflector 3,
Openings 30 and 31 are provided, respectively. A boss 32 for attaching a later-described attachment spring 48 and a boss 33 for attaching a later-described shade 6 are provided on the peripheral edge of the rear opening 31 of the movable reflector 3. An attachment spring 48 is attached to the boss 32 with a screw 49. At the peripheral edge of the rear opening 31 of the movable reflector 3, a pressing surface 34 to which a flange 45 of the light source bulb 4 described below is pressed and mounted, and a mounting surface 35 to which a shade 6 described later is mounted are respectively provided. Is provided. On the inner surface of the movable reflector 3, a reflection-ineffective portion of a mounting portion of the light source bulb 4 described later on the center side, that is, a reflection-ineffective portion 36 such as the boss portions 32 and 33 on the peripheral portion of the rear opening portion 31 and the periphery.
Between the upper wall 37, the lower wall 38, and the side walls of the left and right side walls 39, the front surface (the surface facing the lens 2) side has a rotation curve such as a paraboloid of revolution or a spheroid. The configured main reflector (main reflection surface) 5 is provided. The main reflector 5 is vertically divided into two parts with respect to the optical axis Z-Z as shown in the figure. The main reflector 5 does not need to be vertically divided into two parts as shown in the figure.

In FIG. 1, reference numeral 4 denotes a light source bulb. The light source bulb 4 is a so-called H4 type bulb, and includes a main filament 40, a sub-filament 41, and a light shielding plate 4.
2, a cylindrical base 44 integrally provided at the rear of the glass tube 43, and a base 4
4 includes a flange 45 integrally provided at an intermediate portion of the base 4 and a terminal 46 projecting rearward from a rear end of the base 44.

The light shielding plate 42 of the light source bulb 4 has a substantially hemispherical shape and covers the lower half of the sub-filament 41. At the tip of the glass bulb 43 of the light source bulb 4,
A light-shielding portion 47 painted with an opaque paint is provided. The light shielding portion 47 shields direct light that travels directly from the filament 40 or 41 of the light source bulb 4 to the lens 2 side in cooperation with a shade 6 described later.

The glass bulb 4 of the light source bulb 4 thus constructed
3 is inserted into the main reflector 5 side of the movable reflector 3 from the rear opening 11 of the lamp housing 1 and the rear opening 31 of the movable reflector 3, and the flange 45 of the light source bulb 4 contacts the pressure contact surface 34 of the movable reflector 3. By being in contact, the light source bulb 4 is detachably attached to the movable reflector 3 by the attachment spring 48. At this time,
The filaments 40 and 41 of the light source bulb 4 have an optical axis Z-Z.
The main filament 40 is located on the focal point F of the main reflector 5 while being located at the top.

In FIG. 1, reference numeral 7 denotes a so-called rubber cover waterproof cover. The periphery of the waterproof cover 7 is detachably and watertightly attached to the periphery of the rear opening 11 of the lamp housing 1 by a mounting cap (not shown), and then the central boss of the waterproof cover 7 is attached to the light source bulb. 4
Of the lamp housing 1 in a watertight manner.
It is configured to prevent entry into the lamp room 14 from the rear opening 11.

In the figure, reference numeral 6 denotes a hollow cylindrical shade made of, for example, a metal plate. The shade 6 blocks out of the light from the light source bulb 4, the direct light or the glare light that directly goes to the lens 3 without hindering the light that goes to the main reflector 5. That is, the shade 6 includes an opening 60 for allowing the light from the light source bulb 4 to enter the main reflector 5, the lens 2, the reflection ineffective portion 36, and the side walls 37, 38. It is composed of a blocking part 61 for blocking incidence on 39 and a mounting leg part 62. The mounting leg 62 is mounted on the mounting surface 35 of the movable reflector 3 by a screw 63, and the shade 6 is disposed at a predetermined position in the lamp room 14.

When the main filament 40 of the light source bulb 4 is turned on, light from the main filament 40 of the light source bulb 4 enters the upper and lower main reflectors 5 of the movable reflector 3 as shown by solid arrows in FIG. And the reflected light is substantially parallel light (the main filament 40 is not a point light source but a three-dimensional light source having a certain length and width, so it is not perfectly parallel light)
The light is radiated to the outside through the lens 2 in a predetermined light distribution pattern as L1. At this time, of the light from the main filament 40 of the light source bulb 4, the range effectively used for the above-described external irradiation is, as shown in FIG. 18, the range A which is incident on the above-mentioned upper and lower main reflectors 5. It is.

On the other hand, the subfilament 4 of the light source bulb 4
When the light source 1 is turned on, the light from the sub-filament 41 of the light source bulb 4 is incident on the upper main reflector 5 of the movable reflector 3 and reflected, as shown by the dashed arrow in FIG. (Sub filament 41
The main reflector 5 on the main filament 40
Is slightly (about 7 mm in this example) closer to the lens 2 side than the focal point F of the lens 2 and is directed downward compared with the parallel light from the main filament 40). Irradiation. At this time, the range of the light from the subfilament 41 of the light source bulb 4 that is effectively used for the above-described external irradiation is the range B that is incident on the upper main reflector 5 as shown in FIG. is there. When the sub-filament 41 is turned on, light from the sub-filament 41 does not enter the lower main reflector 5 because the lower half of the sub-filament 41 is covered with the light shielding plate 42.

Then, by the cooperative action of the light shielding part 47 of the light source bulb 4 and the blocking part 61 of the shade 6, as shown by a dashed line arrow in FIG. The direct light that goes directly to is blocked. In addition, by the blocking portion 61 of the shade 6,
A reflection-ineffective portion 36 of the movable reflector 3 from the filament 40 or 41 of the light source bulb 4 (particularly, a peripheral portion of the rear opening 31 through which the light source bulb 4 is inserted) and a side wall portion 37;
Light incident on 38 and 39 is blocked.

[0013]

However, in the above-mentioned conventional vehicle headlamp, the range of the light from the filaments 40 and 41 of the light source bulb 4 that is effectively used for external irradiation is limited by the main filament 40. In this case, as shown in FIG. 18, the area A is incident on the upper and lower main reflectors 5, and in the case of the subfilament 41, as shown in FIG. 19, the area B is incident on the upper main reflector 5, which is narrow. Limited to range.

An object of the present invention is to use a sub-reflector to increase the range of light from a filament of a light source bulb that is effectively used for external irradiation, and to use a component despite the use of a sub-reflector. An object of the present invention is to provide a vehicular headlamp capable of reducing the number of points and the number of assembling steps.

[0015]

According to the present invention, there is provided a sub-reflector for utilizing, of the light from a light source bulb, light which travels other than the main reflector toward a lens side for use, and this sub-reflector is integrally fixed to a shade. It is characterized by having done.

As a result, the vehicle headlamp of the present invention uses the sub-reflector to effectively use the light that travels to other than the main reflector among the light from the filament of the light source bulb. Can be used in a wider range. That is, the light from the light source bulb can be more effectively used. Moreover, since the sub-reflector and the shade are integrally fixed, the number of parts and the number of assembling steps can be reduced despite the use of the sub-reflector.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Three embodiments of a vehicle headlamp according to the present invention will be described below with reference to FIGS.
1 to 6 show a first embodiment of a vehicle headlamp according to the present invention. This example describes a vehicle headlamp of a movable reflector movable type. In the drawing, the same reference numerals as those in FIGS. 15 to 19 denote the same components.

In FIG. 1, reference numeral 8 denotes a sub-reflector member made of, for example, a metal plate. The sub-reflector member 8 has an integral structure of a sub-reflector (sub-reflective surface) 80 whose front side is constituted by a rotation curve surface such as a paraboloid of revolution or a spheroid like the main reflector 5 and a fixed leg portion 81. Consists of The above-described sub-reflector 80 has a circular annular shape when viewed from the front, and is provided with a through-hole 82 inside the light source bulb 4 through which the light source bulb 4 can pass. The outside (outer diameter) of the sub reflector 80 is large enough not to hinder the light traveling from the filaments 40 and 41 of the light source bulb 4 to the main reflector 5. Fixed legs 81 described above
On the front surface side, a reflection surface composed of a rotation curve surface such as a paraboloid of revolution or a spheroid is formed similarly to the sub-reflector 80. The front end of the fixed leg portion 81 is bent rearward, and the bent end portion is located between the openings 60 on the left and right sides of the shade 6, and has a front blocking portion 61 and a rear blocking portion 61. Are fixed by a suitable means such as welding to the inside of the connecting portion 64 connecting the two. As a result, the sub-reflector member 8 (the sub-reflector 80) is installed inside the shade 6 having a cylindrical shape. The focal point of the sub-reflector 80 (including the reflection surface of the fixed leg portion 81) coincides with the focal point F of the main reflector 5 or slightly (about 7 in this example).
mm) It is located on the lens 2 side.

Since the vehicle headlamp according to the present invention in this embodiment has the above-described configuration, when the main filament 40 of the light source bulb 4 is turned on, as shown by the solid arrow in FIG. Light from the main filament 40 of the light source bulb 4 enters the upper and lower main reflectors 5 of the movable reflector 3 and is reflected, and the reflected light is radiated to the outside through the lens 2 as a substantially parallel light L1 in a predetermined light distribution pattern. Is done. As shown by a solid line arrow in FIG. 1, light from the main filament 40 of the light source bulb 4 is incident on and reflected by the sub-reflector 80, and the reflected light is substantially parallel light (the focus of the sub-reflector 80 is When the light is coincident with the focal point F of the reflector 5, the light is parallel light, but the focal point of the sub reflector 80 is the focal point F of the main reflector 5.
The light L3 is radiated to the outside through the lens 2 in a predetermined light distribution pattern as L3 (when the light is located further forward (toward the lens 2 side, the light becomes slightly upward)). At this time, the range of the light from the main filament 40 of the light source bulb 4 that is effectively used for the above-described external irradiation is, as shown in FIG. And the range C incident on the sub-reflector 80 described above.

On the other hand, the subfilament 4 of the light source bulb 4
When the light source 1 is turned on, the light from the sub-filament 41 of the light source bulb 4 enters the upper main reflector 5 of the movable reflector 3 and is reflected, as shown by the broken line arrow in FIG. Lens 2 as downward light L2
And is radiated to the outside in a predetermined light distribution pattern. Also,
As shown by the dashed arrow in FIG. 1, light from the sub-filament 41 of the light source bulb 4 is incident on and reflected by the sub-reflector 80, and the reflected light is substantially downward light (the focus of the sub-reflector 80 is the main reflector 5). When the focal point F coincides with the focal point F, the light is directed downward, but the focal point of the sub-reflector 80 is ahead of the focal point F of the main reflector 5 (toward the lens 2).
(If it is located at a position L1, the light will be almost parallel light.) L4 is applied to the outside through the lens 2 in a predetermined light distribution pattern. At this time, the range of the light from the sub-filament 41 of the light source bulb 4 that is effectively used for the above-described external irradiation is:
As shown in FIG. 5, a range B is incident on the upper main reflector 5 and a range D is incident on the sub-reflector 80.

As described above, in the vehicle headlamp of the present invention in this embodiment, the range of the light from the filaments 40 and 41 of the light source bulb 4 that is effectively used for external irradiation is determined by the range of the main filament 40. In this case, as shown in FIG. 4, a range A is incident on the upper and lower main reflectors 5 and a range C is incident on the sub-reflector 80.
In the case of the sub-filament 41, as shown in FIG.
A range B incident on the upper main reflector 5 and a range D incident on the sub-reflector 80. Compared with a conventional vehicle headlamp, the range C for the main filament 40 and the range C for the sub-filament 41 D can be made wider. That is, the vehicle headlamp of the present invention in this embodiment uses the sub-reflector 80 to control the filaments 40 or 41 of the light source bulb 4.
Of the light from the light source, which is incident on the reflection-ineffective portion 36 of the movable reflector 3, and which has been conventionally wasted can be effectively used. In addition, the light shielding part 4 of the light source bulb 4
As shown by the dashed-dotted arrow in FIG. 15 described above, direct light that directly travels from the filament 40 or 41 of the light source bulb 4 toward the lens 2 is shielded by the cooperative action of the shade 7 and the blocking part 61 of the shade 6 In addition, the blocking part 6 of the shade 6
As shown in FIGS. 5 and 6, as shown in FIGS. 5 and 6, the reflection-ineffective portion 36 of the movable reflector 3 (particularly the rear opening 31 through which the light source bulb 4 passes Light incident on the (peripheral portion) and the side walls 37, 38, and 39 is blocked.

Further, in the vehicle headlamp of the present invention in this embodiment, since the sub-reflector member 8 having the sub-reflector 80 is integrally fixed to the shade 6,
Although the sub-reflector 80 is used, the number of parts and the number of assembling steps can be reduced.

In particular, in the vehicle headlight according to the present invention in this embodiment, the front side of the fixed leg portion 81 of the sub-reflector member 8 fixed to the connecting portion 64 of the shade 6 has the same reflection as the sub-reflector 80. Since the surface is configured, it is possible to supplement the influence of the connecting portion 64 of the shade 6 on the incidence of light from the light source bulb 4 to the main reflector 5 (this effect is extremely small as described later).
The width of the connecting portion 64 of the shade 6 described above, that is, the width of the connecting portion 64 provided between the left and right openings 60 for connecting the front blocking portion 61 and the rear blocking portion 61. Are narrow, the filaments 40, 41 of the light source bulb 4
The influence of light from the main reflector 5 on the main reflector 5 is extremely small.

In particular, in the vehicle headlight according to the present invention in this embodiment, since the sub-reflector 80 is disposed inside the shade 6, the reflection-ineffective portion 36 of the movable reflector 3 looks bright, and the movable reflector 3 The appearance is improved as compared with the conventional vehicle headlamp in which the reflection-ineffective portion 36 of the third looks dark.

In the vehicle headlamp according to the present invention in this embodiment, the sub-reflector 80 is composed of a single sub-reflector. In this case, the focal point of the lower sub-reflector coincides with the focal point F of the main reflector 5, and the focal point of the upper sub-reflector is located slightly (about 7 mm in this example) on the lens 2 side than the focal point F of the main reflector 5. doing.

FIGS. 7 to 12 show a second embodiment of a vehicle headlamp according to the present invention. This example describes a vehicle headlamp of a movable reflector movable type. In the figure, FIG.
6 to FIG. 6 and FIG. 15 to FIG.

In the drawing, 9A and 9B are a lower sub-reflector member and an upper sub-reflector member made of, for example, a metal plate. The upper and lower sub reflector members 9A and 9B
The front side is composed of upper and lower sub-reflectors (sub-reflective surfaces) 90A and 90B, each of which is constituted by a rotation curve surface such as a paraboloid of revolution or a spheroid, like the main reflector 5, and the upper and lower fixed legs 91A and 91B. Is configured. Upper and lower sub-reflectors 90A and 90B described above
Is a part of a circular ring when viewed from the front. The inside (inner diameter) of the upper and lower sub-reflectors 90A and 90B is large enough not to hinder light traveling from the filaments 40 and 41 of the light source bulb 4 to the main reflector 5, and the upper and lower sub-reflectors 90A and 90B. Is slightly larger than the ineffective reflection portion 36 of the mounting portion of the light source bulb 4 on the center side of the main reflector 5. In other words, a portion 300 on the center side of the main reflector 5 and adjacent to the reflection ineffective portion 36 (the portion 300
This portion 300 is difficult to form a predetermined reflecting surface in terms of molding, surface treatment, and design, and when light from the light source bulb 4 is incident on this portion 300, it is likely to cover scattered light. The size (indicated by reference numeral 900 in FIG. 7). The inner ends of the upper and lower sub-reflectors 90A and 90B are bent, and the bent ends are fixed to the outside of the shade 6 by appropriate means such as welding. The upper and lower fixed legs 91A and 91B are L-shaped when viewed from the side, and the ends of one bent piece are integrally connected from the outer center of the upper and lower sub reflectors 90A and 90B. The other bent piece is fixed to the outside of the shade 6 by appropriate means such as welding.
As a result, the upper and lower sub-reflector members 9A and 9B (both upper and lower sub-reflectors 90A and 90B) are installed outside the cylindrical shade 6. The lower sub-reflector 90A coincides with the focal point F of the main reflector 5, and the upper sub-reflector 90B is located slightly (about 7 mm in this example) from the focal point F of the main reflector 5 on the lens 2 side.

The headlamp for a vehicle according to the present invention in this embodiment has the above-described configuration. When the main filament 40 of the light source bulb 4 is turned on, as shown by the solid line arrow in FIG. Light from the main filament 40 of the light source bulb 4 enters the upper and lower main reflectors 5 of the movable reflector 3 and is reflected, and the reflected light is radiated to the outside through the lens 2 as a substantially parallel light L1 in a predetermined light distribution pattern. Is done. 7, light from the main filament 40 of the light source bulb 4 enters the lower sub-reflector 90A and is reflected, and the reflected light is substantially parallel light L5. From the main filament 40 of the upper sub-reflector 90B
And reflected, and the reflected light is irradiated to the outside through the lens 2 in a predetermined light distribution pattern as slightly upward light L6. At this time, the range of the light from the main filament 40 of the light source bulb 4 which is effectively used for the above-mentioned external irradiation is, as shown in FIG. And the range E incident on the above-mentioned upper and lower sub-reflectors 90A and 90B.

On the other hand, the sub filament 4 of the light source bulb 4
When the light source 1 is turned on, the light from the sub-filament 41 of the light source bulb 4 enters the upper main reflector 5 of the movable reflector 3 and is reflected, as shown by the broken line arrow in FIG. Lens 2 as downward light L2
And is radiated to the outside in a predetermined light distribution pattern. Also,
As shown by a broken arrow in FIG. 7, light from the sub-filament 41 of the light source bulb 4 is transmitted to the upper sub-reflector 90B.
And is reflected, and the reflected light is radiated to the outside through the lens 2 as a substantially parallel light L7 in a predetermined light distribution pattern. At this time, of the light from the subfilament 41 of the light source bulb 4, the range effectively used for the above-mentioned external irradiation is, as shown in FIG. 12, a range B which is incident on the above-mentioned upper main reflector 5. , The above-mentioned upper sub-reflector 9
The range G is incident on 0B.

As described above, in the vehicle headlamp of the present invention in this embodiment, the range of the light from the filaments 40 and 41 of the light source bulb 4 that is effectively used for external irradiation is determined by the range of the main filament 40. In this case, as shown in FIG. 11, a range A is incident on both upper and lower main reflectors 5 and a range E is incident on both upper and lower sub-reflectors 90A and 90B. In the case of sub-filament 41, as shown in FIG. In addition, there are a range B incident on the upper main reflector 5 and a range G incident on the upper sub-reflector 90B. Compared with a conventional vehicle headlamp, the range E for the main filament 40 and the range
In the case of, the range G can be made wider. That is, the vehicle headlamp according to the present invention in this embodiment uses the upper and lower sub-reflectors 90A and 90B, thereby making the reflection of the movable reflector 3 out of the light from the filaments 40 or 41 of the light source bulb 4 invalid. Light that is incident on the portion 36 and has been conventionally wasted can be effectively used. In addition, due to the cooperative action of the light shielding part 47 of the light source bulb 4 and the blocking part 61 of the shade 6, as shown by the dashed line arrow in FIG. The direct light that travels directly is shielded, and the blocking part 61 of the shade 6 disables the reflection of the movable reflector 3 from the filaments 40 or 41 (particularly the subfilament 41) of the light source bulb 4 as shown in FIGS. Light incident on the portion 36 (particularly the peripheral portion of the rear opening 31 through which the light source bulb 4 is inserted) and the side walls 37, 38, and 39 is blocked.

The vehicle headlamp according to the present invention in this embodiment comprises upper and lower sub-reflectors 90A and 90B.
Since the upper and lower sub-reflector members 9A and 9B having the above are integrally fixed to the shade 6, the number of parts and the number of assembling steps can be reduced despite the use of the upper and lower sub-reflectors 90A and 90B. .

In particular, in the vehicle headlamp according to the present invention in this embodiment, the outside (outer shape) of the upper and lower sub-reflectors 90A and 90B is the central portion of the main reflector 5 and the ineffective reflection portion 36. And the part 30 close to
0 (indicated by reference numeral 900 in FIG. 7), so that it is difficult to form a predetermined reflecting surface on molding, surface treatment, and design. Light can be prevented from entering and becoming scattered light. Moreover, the loss of light incident from the light source bulb 4 to the central portion 300 of the main reflector 5 can be supplemented outside the upper and lower sub-reflectors 90A and 90B, so that the portion 300 looks bright when viewed from the front. Can improve the appearance.

It should be noted that the vehicle headlamp of the present invention in the above-described embodiment has a two-part upper and lower sub-reflector 90A.
And 90B, but an integrated sub-reflector may be used. In the case of this integral structure, the focal point coincides with the focal point F of the main reflector 5 or slightly (about 7 m in this example).
m) It is located on the lens 2 side.

FIGS. 13 and 14 show a vehicle headlamp according to a third embodiment of the present invention. In the drawings, the same reference numerals as those in FIGS. 1 to 12 and FIGS. 15 to 19 indicate the same components. The vehicle headlamp according to the third embodiment of the present invention includes a sub-reflector 80 according to the first embodiment described above and a sub-reflector 90A and 90B according to the second embodiment described above with a shade 6 , Respectively, and the first
The same operation and effect as the vehicle headlight of the present invention in the second embodiment can be achieved.

In the vehicle headlamp according to the present invention in the above-described first, second and third embodiments, the boss for mounting the shade 6 is a peripheral portion of the rear opening 31 of the movable reflector 3. A pressure contact surface 34 on the rear surface side near 33 to which the flange 45 of the light source bulb 4 is pressed and attached is perpendicular to the optical axis ZZ. Similarly, the shade 6 near the pressure contact surface 34 and parallel to the pressure contact surface 34
The mounting surface 35 for mounting the shade 6 on the front side of the mounting boss 33 is also perpendicular to the optical axis Z-Z. further,
The flange 45 of the light source bulb 4 is provided with filaments 40 and 41.
Is orthogonal to the axis passing through (optical axis Z-Z described above). Furthermore, the mounting leg 62 of the shade 6 is orthogonal to the axis of the shade 6 (optical axis Z-Z).

As a result, when the flange 45 of the light source bulb 4 is pressed against the pressure contact surface 34 of the movable reflector 3 and the light source bulb 4 is mounted on the movable reflector 3, the main filament 40 of the light source bulb 4 is moved to the main reflector 40. 5 exactly on the focal point F. On the other hand, the sub-reflector 80
And / or when the mounting leg 62 of the shade 6 to which the 90A and 90B are fixed is mounted on the mounting surface 35 of the movable reflector 3 with the screw 63, the sub-reflector 80 and also the 90A and 90B are positioned at predetermined positions via the shade 6. Can be attached with high accuracy. That is, the above-described sub-reflectors 80 and / or 90A and 90B need to be accurately attached to the light source bulb 4 and the main reflector 5, but due to the above-described mounting structure of the vehicle headlight of the present invention, the sub-reflectors 80 and Alternatively, 90A and 90B can be attached to light source bulb 4 and main reflector 5 with high accuracy.

In the above embodiment, the light source bulb 4 has been described as a double filament including a main filament 40 and a subfilament 41. However, the vehicle headlamp of the present invention is a single filament light source. Also applicable to valves.

In the above-described embodiment, the main reflector 5 is provided on the movable reflector 3 separate from the lamp housing 1. However, the vehicle headlamp according to the present invention uses the main filament with the lamp housing. It can also be applied to integrated ones.

[0039]

As is apparent from the above description, the vehicle headlamp of the present invention can cut direct light and glare light by the shade, and further, by using the sub-reflector, the light from the filament of the light source bulb can be obtained. Of these, light that travels other than the main reflector is effectively used, so that the range that can be effectively used for external irradiation can be expanded. That is, the light from the light source bulb can be more effectively used.
Moreover, since the sub reflector and the shade are integrally fixed, the number of parts and the number of assembling steps can be reduced despite the use of the sub reflector.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a vehicular headlamp according to the present invention.

FIG. 2 is a perspective view of a sub reflector and a shade.

FIG. 3 is a front view of a sub reflector and a shade.

FIG. 4 is a sectional view of a sub reflector and a shade.

FIG. 5 is an explanatory diagram showing an effective use range of a main reflector and a sub reflector when a main filament is turned on.

FIG. 6 is an explanatory diagram showing an effective use range of the main reflector and the sub-reflector when the sub-filament is turned on.

FIG. 7 is a longitudinal sectional view showing a vehicle headlamp according to a second embodiment of the present invention.

FIG. 8 is a perspective view of a sub reflector and a shade.

FIG. 9 is a front view of a sub reflector and a shade.

FIG. 10 is a sectional view of a sub reflector and a shade.

FIG. 11 is an explanatory diagram showing an effective use range of a main reflector and a sub reflector when a main filament is turned on.

FIG. 12 is an explanatory diagram showing an effective use range of the main reflector and the sub-reflector when the sub-filament is turned on.

FIG. 13 is a front view of a sub-reflector and a shade showing a third embodiment of the vehicular headlamp according to the present invention.

FIG. 14 is a sectional view of a sub-reflector and a shade.

FIG. 15 is a longitudinal sectional view showing a conventional vehicle headlamp.

FIG. 16 is a perspective view of a sub reflector and a shade.

FIG. 17 is a front view of a sub-reflector and a shade.

FIG. 18 is an explanatory diagram showing an effective use range of the main reflector when the main filament is turned on.

FIG. 19 is an explanatory diagram showing an effective use range of the main reflector when the sub-filament is turned on.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lamp housing, 14 ... Light room, 2 ... Lens, 3 ...
Movable reflector, 34 ... Press contact surface, 35 ... Mounting surface, 36 ...
Reflection-ineffective portion, 300: a portion where it is difficult to form a predetermined reflection surface in design, 4: light source bulb, 40: main filament, 41: sub-filament, 5: main reflector,
6 ... Shade, 7 ... Waterproof cover, 80, 90A, 90B
… Sub reflector, F… Focus of main reflector.

Claims (6)

[Claims] A lamp chamber defined by a lamp housing and a lens; a light source bulb disposed in the lamp chamber;
A main reflector that is disposed in the lamp chamber and reflects light from the light source bulb toward the lens; and a main reflector that is disposed in the lamp chamber and, among light from the light source bulb, hinders light that travels to the main reflector. A shade that blocks direct light and glare light that directly travels to the lens side, wherein the light from the light source bulb that travels to other than the main reflector is transmitted to the lens side. And a sub-reflector that is used by reflecting the light to the vehicle, wherein the sub-reflector is integrally fixed to the shade. 2. The main reflector is provided with a pressure contact surface to which a flange integral with the light source bulb is pressed and attached, and a mounting surface near the pressure contact surface and parallel to the pressure contact surface. The vehicle headlight according to claim 1, wherein the shade is mounted on the mounting surface. 3. The sub-reflector is installed inside the shade having a cylindrical shape, the sub-reflector forms a paraboloid of revolution or a spheroid, and its focal point also comprises a paraboloid of revolution or spheroid. A through hole is provided at the same position as the focal point of the main reflector or near the focal point of the main reflector, inside the sub-reflector so that the light source bulb can pass through, and the outside of the sub-reflector is The vehicular headlamp according to claim 1 or 2, wherein the size of the vehicular headlamp is small enough not to hinder light traveling from the light source bulb to the main reflector. 4. The sub-reflector is divided into upper and lower parts, the upper and lower sub-reflectors are installed inside the cylindrical shade, and the lower sub-reflector forms a paraboloid of revolution or an ellipsoid of revolution. Also coincides with the focal point of the main reflector consisting of a paraboloid of revolution or ellipsoid of revolution, the upper sub-reflector forms a paraboloid of revolution or ellipsoid of revolution, the focal point of which is also from the paraboloid of revolution or ellipsoid of revolution. The upper and lower sub-reflectors are provided with through holes in the vicinity of the focal point of the main reflector so that the light source bulb can pass therethrough, and the outside of the sub-reflector is separated from the light source bulb by the main reflector. The vehicle headlight according to claim 1, wherein the size of the vehicle headlight is such that the light does not hinder light traveling toward the vehicle. 5. The sub-reflector is installed outside the cylindrical shade, the sub-reflector forms a paraboloid of revolution or a spheroid, and its focal point also comprises a paraboloid of revolution or spheroid. The focal point of the main reflector coincides with or is located near the focal point of the main reflector, and the inside of the sub-reflector is large enough not to hinder light traveling from the light source bulb to the main reflector, and 3. The vehicle headlight according to claim 1, wherein an outer side is slightly larger than a reflection-ineffective part of a mounting part of the light source bulb on a center side of the main reflector. 4. 6. The sub-reflector is divided into upper and lower parts, the upper and lower sub-reflectors are installed outside the cylindrical shade, and the lower sub-reflector forms a paraboloid of revolution or an ellipsoid of revolution. Also coincides with the focal point of the main reflector consisting of a paraboloid of revolution or ellipsoid of revolution, the upper sub-reflector forms a paraboloid of revolution or ellipsoid of revolution, the focal point of which is also from the paraboloid of revolution or ellipsoid of revolution. Is located near the focal point of the main reflector, the inside of the upper and lower sub-reflectors is large enough not to hinder the light traveling from the light source bulb to the main reflector, and the outside of the upper and lower sub-reflectors is the main reflector 2. The light source bulb is slightly larger than a reflection-ineffective portion of a mounting portion of the light source bulb on the center side of the light source bulb. Or the vehicle headlight according to 2.