KR100386221B1 - Head lamp - Google Patents

Abstract

(assignment)

One light source bulb supports traffic segmentation on both left and right sides

(Solution)

Since the 4th lead wire LW4 is arrange | positioned in the light shielding area C, by the light-shielding effect of the high beam filament 52, it does not receive the irradiation light from the low beam filament 51. FIG.

Since the front ends SW30 and SW300 of the third support wire SW3 in the semi-shielding area C 'are bent in a curved surface, they are irradiated with light from the low beam filament 51, but are very small and bent surface light. Diffusion action.

Since the lower end of the front end SW20 of the second support wire SW2 is located above the lower end 51D of the low beam filament 51, it does not appear above the contrast boundary line 71.

As a result, since there is no association with the virtual image glare light, it is possible to correspond to the light source bulbs 500L and 500R for the passage classification on both the left and right sides with one light source bulb 500.

Description

Headlights {HEAD LAMP}

The present invention relates to, for example, a headlamp of an automobile, which relates to a headlamp in which a predetermined low beam distribution pattern and a high beam distribution pattern are respectively obtained by front reflection distribution of a reflective surface, and in particular, a left traffic segment with the same light source bulb. A light source bulb capable of corresponding to both a light source bulb of a dragon headlamp and a light source bulb of a headlamp for right-hand passage classification is used.

In addition, in this specification, "front" and "rear" mean the front and rear seen from the driver side in the advancing direction of a motor vehicle. In addition, in this specification and this figure, the code | symbol "A" points to the front side at the time of seeing the front from the driver side, the code "B" refers to the back side at the time of seeing the front from the driver side, and the code "L" Indicates the left side when looking forward from the driver's side, the symbol "R" indicates the right side when looking forward from the driver's side, the symbol "U" indicates the upper side when looking forward from the driver's side, The symbol "D" indicates the lower side when the driver sees the front side, the symbol "HH" indicates the horizontal line (horizontal axis), and the symbol "VV" indicates the vertical line (vertical axis).

(Explanation of headlight of notification)

Hereinafter, this kind of headlamp will be described with reference to FIGS. 11 to 15.

Furthermore, the headlamps in the city are provided on the left side of the vehicle in the right traffic segment (the left side when viewed from the driver's side and the right side when the front side of the vehicle is seen from the front). In addition, the headlights mounted on the vehicle of the left-hand traffic segment are the headlights of the city and the left and right stations. In addition, the headlights on the right side of the vehicle are almost symmetrical with the city's headlights.

The head lamp 3 is partitioned by the lamp housing 1 and the lens (outer lens) 2 of this headlamp. In the lamp compartment 3, the lamp housing 1 and the reflector 4 separate from each other are arranged to be rotatable vertically and horizontally by a pivot mechanism (not shown) and an optical axis adjusting device (not shown). have. This reflecting mirror 4 has a reflecting surface 40 composed of a compound reflecting surface. This reflecting surface 4, that is, a compound reflecting surface is composed of reflecting surface segments (not shown) divided into a plurality of up, down, left and right, and is called a free curved surface. This free-form surface is divided into a plurality of blocks, divided into a few blocks, or a plurality of blocks continuously, as described, for example, in Japanese Patent Laid-Open No. 9-306220. And the like (the connecting line of the block is not visible).

This compound reflection surface does not have a single focus in the strict sense, but the difference in focal lengths between the plurality of rotating parabolic surfaces forming the compound reflection surface is small and shares almost the same focal points. The focal point F is strictly pseudofocus, but in this specification, this is called a focal point F. Similarly, the optical axis Z-Z shown in the drawings is strictly a pseudo optical axis, but in this specification, this is called an optical axis.

The light source bulb 5 is detachably fixed to the reflector 4 described above. The light source bulb 5 is a light source bulb having no light shielding hood, and a low beam filament 51 and a high beam filament 52 are disposed in the glass tube 50, and at the same time, a front end of the glass tube 50 is provided. For example, a black coating film 54 (blocking direct light from the low beam filament 51 and the high beam filament 52 from reaching the lens 2) is provided.

The above-described low beam filament 51 is substantially parallel to the optical axis Z-Z of the reflecting surface 40 and is located ahead of the focal point F of the reflecting surface 40. In addition, the high beam filament 52 is substantially parallel to the optical axis ZZ, and in the vicinity of the focal point F, is further obliquely lower than the low beam filament 51 (in the case of the right passage section, FIG. 25 (R9)). As shown in Fig. 2, the lower right and left traffic segments are located at the lower left side as shown in Fig. 21 (L).

In addition, the center axis of the above-described low beam filament 51 substantially coincides with the optical axis ZZ (reference axis) described above, and at the same time, the center axis of the glass tube 50 described above (hereinafter, simply referred to as a tube axis) ( Z'-Z ') is located below.

The reason why the central axis (optical axis ZZ or reference axis) of the low beam filament 51 is positioned obliquely below the tube axis Z'-Z 'is because of the light distribution pattern of the low beam shown in FIG. In LP, it is for obtaining the stable contrast line 71 (the so-called cut line). That is, as already known, the central axis of the low beam filament 51 is moved below the tube axis Z'-Z ', so that the condensed image of the reflected light in the inner surface portion of the glass tube 50 can be obtained. Does not appear above the contrast boundary line 71 of the light distribution pattern LP of the low beam.

Moreover, in the figure, 6 is the shade. The shade 6 is fixed to the reflecting mirror 4 and at the same time covers the front of the light source bulb 5, and the direct light from the low beam filament 51 and the high beam filament 52 is reflected. It is to block the reaching of the ineffective part 42 and the lens 2 of (4). In addition, 60 is a rubber cap. The rubber cap 60 is fixedly and detachably fixed between the mouthpiece of the light source bulb 5 and the rear opening of the lamp housing 1 by the fixing cap 61, and the back thread 3 is fixed. It is to keep me watertight.

In the above headlamp using the reflecting mirror 4 of the reflecting surface 40 composed of the above-mentioned compound reflecting surface, and the light source bulb 5 composed of the above-described low beam filament 51 and the high beam filament 52. When the low beam filament 51 is turned on, the light from the low beam filament 51 is reflected over the entire reflecting surface 40, and the reflected light is externally shown via the lens 2 in FIG. 14. The light is radiated onto a light distribution pattern LP of a predetermined low beam. On the other hand, when the high beam filament 52 is turned on, the light from the high beam filament 52 is reflected over the entire reflecting surface 40, and the reflected light is externally shown via FIG. 15 via the lens 2. It is irradiated with the light distribution pattern HP of a predetermined high beam.

As described above, the front reflective light distribution of the reflective surface 40 controls the light distribution pattern LP of the predetermined low beam and the light distribution pattern HP of the predetermined high beam. As a headlamp using this composite reflection surface 40 and the light source bulb 5, there exist some which were described in Unexamined-Japanese-Patent No. 8-329703, for example.

(Explanation of predetermined light distribution pattern)

Light distribution pattern LP of predetermined low beam The light distribution pattern HP of predetermined high beam is European light emission standard (ECER eg.) Or the like (for example, Japanese domestic type approval standard), North American light distribution Light distribution pattern suitable for the light distribution standard of FMVSS.

In the above-described light distribution pattern LP of the low beam, the light distribution standard is provided so as to limit the dazzle light. As a result, the light distribution pattern LP of the above-described low beam has a light and dark boundary line 71 considering the opposite difference 7 and the pedestrian 70 of the right side (edge of the cliff road) as shown in FIG. It becomes. In other words, the light and dark border line 71 is located between the left end and the center and slightly below the horizontal line HL-HR so as not to give dazzle light to the counter car 7 and the right pedestrian walker. A gentle inclined line portion which inclines gently, for example, 15 degrees upwards, at a central horizontal portion 72 so that the right pedestrian 70 can be visually recognized without giving dazzle light at 70. 73) and the inclined line portion 74 which inclines downward from the gentle inclined line portion 73 to the horizontal portion 72 and returns. In this low beam light distribution pattern LP, there is no standard regarding the maximum luminous intensity value.

On the other hand, in the above-mentioned high beam light distribution pattern HP, the maximum luminous intensity value and the maximum luminous intensity band are standardized. As a result, the light distribution pattern HP of the high beam mentioned above has a hot zone HZ (maximum luminous intensity band including a maximum luminous intensity point) in a center part, as shown in FIG. Here, in the European light distribution standard (ECER eg.), The maximum luminous intensity value is 48 to 2401x (measurement on the screen 25 m away at 11x = 625cd), and the luminous intensity value of the intersection HV between the horizontal line HL-HR and the vertical line VU-VD is maximum. It is 80% or more (recognition) of light intensity.

In the headlamp described above, it is important to obtain a good low beam distribution pattern LP and a high beam distribution pattern HP.

(Explanation of light source bulb for left traffic segment and light bulb for right traffic segment)

The light source bulb 5 used in the headlight described above is a light source bulb 5L dedicated to the left traffic segment used for the headlight of the left traffic segment, and a light source bulb 5R dedicated to the right traffic segment used for the headlight of the right traffic segment. ) Are each delimited.

In the light source bulb 5L for the left passage division, the high beam filament 52 is located obliquely downward to the left of the low beam filament 51 as shown in Fig. 21 (L).

In addition, the light source bulb 5R for right-hand passage division is located obliquely downward to the high beam filament 52 and the low beam filament 51, as shown in FIG. 25 (R).

(Explanation of possibility to cope with traffic division of right and left by the same light source bulb)

The light source bulb 5 used in the headlamp described above is characterized in that the high beam filament 52 is located obliquely below the low beam filament 51. That is, as shown in Fig. 16, the light source bulbs 5 and 5R for right-handed passage division of (R), in which the high beam filament 52 is located obliquely downward from the driver side of the low beam filament 51. The light source bulbs 5 and 5L for the left passage division of (L) in which the high beam filament 52 is located obliquely downward to the left as viewed from the driver side of the low beam filament 51 are the high beam filament 52. Are arranged at positions symmetrical with respect to the central axis (optical axis ZZ or reference axis) of the low beam filament 51.

For this reason, the light source bulb 5 used in the above-mentioned headlamp has a light source in the initial state of (C) in which the low beam filament 51 and the high beam filament 52 are arranged on the vertical line VU-VD. By rotating the bulb 5 to the left and right in the direction of the arrow about the center axis of the low beam filament 51, the same (one) light source bulb 5 is used as a light source bulb 5,5L for the headlight of the left passage segment. ) And the light source bulbs 5 and 5R for the headlamps of the right-hand traffic segment. Further, reference numeral VU 'in FIG. 16 rotates the light source bulb 5 in the initial state of (C) from side to side to correspond to the light source bulbs 5L, 5R for right and left passage divisions of (L) and (R). In this case, the "upper side" of the light source bulb 5 in the initial state is indicated.

(Explanation of virtual image glare light by wire)

In the headlamp described above, the light and dark boundary line 71 is formed at the lower end of the low beam filament 51, and the low beam filament 51 generally has lead wires 55U and 55D as shown in FIG. And the support wires 56U and 56D. Further, reference numerals 51U and 51D in Fig. 17 designate upper and lower ends of the low beam filament 51, respectively.

Here, when the low beam filament 51 of FIG. 17 is turned on, the lead wires 55U and 55D and the support wires 56U and 56D described above are illuminated by the light emission of the low beam filament 51. (The closer it is to the low beam filament 51, the more the larger the irradiated area shines, the stronger). When the above-described lead wires 55U and 55D and the support wires 56U and 56D are located below the lower end portion 51D of the low beam filament 51 in structure, the portion thereof is shown in Fig. 18 (for right passage division). It becomes a virtual glare light, and appears above the contrast line 71. FIG.

That is, as shown in FIG. 18, the lower end part 51D of the low beam filament 51 is located on the contrast line 71 (horizontal line part 72, gentle inclination line part 73), and at the same time, the low beam filament (51) (including the upper end 51U) and the upper lead wire 55U and the support wire 56U are located below the contrast boundary line 71 (horizontal line portion 72, gentle inclination line portion 73), but the lower lead The wire 55D and the support wire 56D are located above the contrast line 71 (horizontal line portion 72, gentle slope line portion 73), so that the lower lead wire 55D and the support wire 56D are positioned. The part becomes a virtual glare light. Furthermore, in Fig. 18, the images of the low beam filament 51, the lead wires 55U and 55D, and the support wires 56U and 56D are diffused to the left and right and obliquely to the right and left or obliquely, as shown by the arrows.

(Explanation of relative position of filament of wire of notice lamp and wire)

For example, as shown in FIGS. 19 to 21, the light source bulb 5 used in the aforementioned headlamp has a first angle between the front end 51A and the upper end 51U of the low beam filament 51. It is supported by the lead wire LW1 and the first support wire SW1 and at the same time the angle between the rear end 51B and the upper end 51U of the low beam filament 51 and the rear end of the high beam filament 52 ( The angle between 52B) and the upper end 52U is supported by the second lead wire LW2 and the third lead wire LW3 and the second support wire SW2, and further, the front end of the high beam filament 52 thereof. The angle between 52A and the lower end 52D is supported by the fourth lead wire LW4 and the third support wire SW3. Further, reference numeral 57 in Figs. 19 to 21 denotes a glass bridge that supports the above-described support wires SW1, SW2, and SW3.

By the way, the light source bulb 5 used in the headlight mentioned above is a light source bulb 5L for the left traffic segment shown in FIG. 21 and a light source bulb 5R for the right traffic segment shown in FIG. It is divided into exclusive. For this reason, for example, in the case of the light source bulb 5L for the left passage division, as shown in Figs. 19 to 21, the third support wire is located at the same horizontal level as the high beam filament 52. (SW3) extends forward from the bridge 57, is bent to the left once to avoid the high beam filament 52, and is extended forward again, and the fourth lead wire (LW4) is the third It is installed (tightly) horizontally at the angle between the front end and the lower end of the support wire SW3, and the angle between the front end 52A and the lower end 52D of the high beam filament 52 described above.

For this reason, in the headlamp used for the light source bulb 5L for the left passage division mentioned above, as shown in FIG. 21, the light source bulb 5L in the initial state of (C) is made into the low beam filament 51. As shown in FIG. When using the light source bulb 5L for the left passage division of (L) in the left direction about the central axis of the (L), the third support wire SW3 and the fourth lead wire LW4 are the low beam filaments ( Since it is located above the lower end part 51D of 51, there is no problem of a virtual glare light, but when it turns to the right direction and uses it as the light source bulb 5L for right side division of (R), the 3rd support wire SW3 ) And the fourth lead wire LW4 are located below the lower end portion 51D of the low beam filament 51, which causes a problem of virtual glare light.

Here, specific examples of the virtual glare light in the case where the above-described light source bulb 5L for the left passage division is used for the light source bulb for the right passage division will be described with reference to FIGS. 22 to 24.

First, the condition of the light source bulb 5L is that the length of the low beam filament 51 is 5.5 mm, the diameter of the low beam filament 51 is ø1.5 mm, the amount of luminous flux of the low beam filament 51 is 8601 m, the high beam filament (The length of the 520 is 5.0 mm, the diameter of the high beam filament 52 is ø1.3 mm, the luminous flux of the high beam filament 52 is 1300 lm, and the diameter of the glass tube 50 is ø 16 mm. The condition is an example that is empirically appropriately and realistically obtained in consideration of the lifespan, the light quantity, the manufacturability, the usability, the performance maintainability, and the like as a headlamp for an automobile, and the light flux amount is a value at a voltage of 12V.

In addition, the horizontal line relationship between the low beam filament 51 and the high beam filament 52, i.e., the line segment connecting the center of the low beam filament 51 and the center of the high beam filament 52 when viewed from the front. The angle θ to HL-HR is 20 °, and the distance T1 from the center of the low beam filament 51 to the center of the high beam filament 52 when viewed from the front is 2.8 mm, and the low beam filament when viewed from the side ( The distance T2 in the front-rear direction from the center of 51) to the center of the high beam filament 52 is 2.5 mm. This condition is only one example.

When the above-mentioned light source bulb 5L for the left passage division is used for the right passage division, as shown in Fig. 24, the point P (B50L) which strictly limits the glare light of the European light distribution standard (ECER eg.) In this case, virtual glare light appears in the point indicated by the double circles in FIG. 24 and the zone Z (the region indicated by the oblique line in FIG. 24 exceeds the proposed value).

Fig. 25 shows a light source bulb 5R for exclusive use of right side passage division by bending the third support wire SW3 to the right side. When the light source bulb 5R in the initial state of this (C) is rotated to the right about the central axis of the low beam filament 51 and used as the light source bulb 5R for right passage division of (R), Since the third support wire SW3 and the fourth lead wire LW4 are located above the lower end portion 51D of the low beam filament 51, there is no problem with the virtual glare light, but it rotates to the left and passes to the left of (L). When used as the light source bulb 5R for dividing, since the 3rd support wire SW3 and the 4th lead wire LW4 are located below the lower end part 51D of the low beam filament 51, the above-mentioned left passage Similarly to the case where the light source bulb 5L dedicated to the division is used for the right passage division, there is a problem of the virtual image glare light.

Thus, in the conventional headlight, in the case of the headlight for the left traffic segment, the light source bulb 5L for the left traffic segment shown in FIG. 21 (L) is used, and in the case of the headlight for the right traffic segment, FIG. Since the light source bulb 5R dedicated to the right side passage segment shown in 25 (R) is used, the light source bulb for the left side passage segment and the light source bulb for the right side passage segment are used as the same light source bulb. It cannot cope with both.

Moreover, in the above-mentioned conventional headlamp, as shown in FIG. 20, when the light source bulb 5L of an initial state is seen from the side, the lower end SW2 'of the vertical bending part of the front end part of the 2nd support wire SW2. If it is located below the extension line L8 from the lower end 51D of the low beam filament 51, even if the light source bulb 5L is used for the left passage division, the lower end of the second support wire SW2 ( SW2 'may be located below the lower end 51D of the low beam filament 51, and a problem of a virtual glare light will arise.

An object of the present invention is to provide a headlamp using a light source bulb that can correspond to both the light source bulb for the left passage segment and the light source bulb for the right passage segment with the same light source bulb.

1 shows an embodiment of the headlamp of the present invention, and is a side view of a light source bulb in an initial state for explaining an arrangement position of a fourth lead wire, a third support wire, and a second support wire;

2 is a front view of the light source bulb in the initial state for explaining the arrangement positions of the fourth lead wire and the third support wire,

3 is a plan view of a light source bulb in an initial state for explaining the arrangement of the lead wires and the support wires;

4 is a side view of the light source bulb in an initial state for explaining the arrangement of the lead wires and the support wires;

5 is a front view of the light source bulb in the initial state, (R) is a front view of the light source bulb made for right-hand passage by rotating the light source bulb in the initial state to the right, and (L) Front view of a light source bulb made by rotating the light source bulb to the left for the left traffic segment,

6 is a front view for explaining a state in which the third lead wire of the light source bulb is not visible;

7 is a side view of a light source bulb in an initial state for explaining a modification of the arrangement positions of the fourth lead wire, the third support wire and the second support wire;

8 is a side view of a light source bulb in an initial state for explaining a modification of the arrangement of the lead wires and the support wires;

Fig. 9 is an illuminance curve diagram showing a light distribution pattern of a low beam of the right traffic segment, (B) is an illuminance curve diagram showing a light beam distribution pattern of a high beam of the right traffic segment,

Fig. 10 is an illuminance curve diagram showing a light distribution pattern of a low beam of the left passage segment, (B) a light illuminance curve diagram showing a light beam distribution pattern of a high beam of the left passage segment,

11 is a front view of a conventional headlamp, in a state where a reflecting surface and a shade of a reflecting mirror are transmitted through a lens;

12 is a cross-sectional view taken along line XII-XII in FIG. 11;

FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 11;

14 is an image diagram of a light distribution pattern of a low beam;

15 is an image diagram of a light distribution pattern of a high beam;

Fig. 16 is a view for explaining the possibility of correspondence to the passage divisions on both the left and right sides of the same light source bulb, (C) is a front view of a general light source bulb in an initial state, and (R) is a light source in an initial state. (L) is a front view of a light source bulb made by rotating the bulb to the right to make the right passage, (L) is a front view of a light source bulb made by rotating the bulb to the left to the left.

FIG. 17 is a view for explaining the virtual glare light caused by the wire, and is a side view showing the arrangement state of the low beam filament, the lead wire, and the support wire;

18 is a screen image for explaining the virtual glare light by the light source bulb of FIG.

19 is a plan view of a light source bulb in an initial state for explaining an arrangement state of a lead wire and a support wire as a light source bulb for a conventional left passage division;

Fig. 20 is a side view of the light source bulb in the initial state for explaining the arrangement of the lead wires and the support wires, as a conventional light source bulb for the left passage division.

Fig. 21 is a light source bulb for a conventional left passage segment, where (C) is a front view of the light source bulb in the initial state, and (R) is a light source made for right side segmentation by rotating the light source bulb in the initial state to the right. Front view of the bulb, (L) is a front view of the light source bulb made for the left traffic segment by rotating the light source bulb in the initial state to the left,

Fig. 22 is a front view for explaining the relative positional relationship between the low beam filament and the high beam filament in the conventional light source bulb for left-hand segmentation;

FIG. 23 is a XXIII view in FIG. 22, FIG.

FIG. 24 shows a state in which a light source bulb for a left-handed segment is used for right-handed segmentation, and a state in which the light beam of the European light distribution standard ECEReg. Illumination curve,

25 is a conventional light source bulb for right-handed passage classification, (C) is a front view of the light source bulb in the initial state, (R) is a light source bulb made for right-handed passage by rotating the light source bulb in the initial state to the right. Front view, (L) is a front view of the light source bulb made for the left traffic segment by rotating the light source bulb in the initial state to the left.

"Description of Symbols for Major Parts of Drawings"

1: lamp housing 2: lens 3: lamp

4: reflector for headlight

40: reflecting surface composed of a compound reflecting surface (so-called free-form surface)

500: light source bulb 51: low beam filament

52: filament 6: shade for high beam

70: Pedestrian Pedestrian (Pedestrian at the Edge of Cliff Road)

71: contrast line 72: horizontal line 73: gentle slope line

LW1, LW2, LW3, LW4: Leadwires SW1, SW2, SW3: Support wire

LP: light distribution pattern of low beam HP: light distribution pattern of high beam

HZ: Hot Zone F: Focus Z-Z: Optical Axis

Z'-Z ': Tube axis H-H: Horizontal line (horizontal axis)

V-V: Vertical line (vertical axis) A: Front side B: Rear side

C: Shading Area C ': Semi Shading Area

U: Upper D: Lower L: Left

R: right

In order to achieve the above object, the present invention (description of claim 1) is performed by the fourth lead wire from the front end of the high beam filament to the rear end side when the light source bulb in the initial state is viewed from the side. In addition, when the fourth lead wire is viewed from the front of the light source bulb in the initial state, an extension line passing from the left end of the low beam filament to the left end of the high beam filament and an extension line passing from the right end of the low beam filament to the right end of the high beam filament It is arranged in between, and further, the front end of the fourth lead wire is located behind the extension line passing through the front end bottom angle of the high beam filament at the front end bottom angle of the low beam filament when the light source bulb in the initial state is viewed from the side. A light source bulb is used.

As a result, the headlamp of the present invention uses the light source bulb having the above-described configuration, thereby rotating the light source bulb in the initial state to the right around the central axis of the low beam filament, and as the light source bulb for the right traffic segment. As a light source bulb for left-handed division, which is rotated in the left direction, even if each of them is used, at least part of the front end of the fourth lead wire from the left end of the high beam filament at the left end of the low beam filament when viewed from the front. Between the extension line passing through the left end and the extension line passing through the right end of the high beam filament from the right end of the low beam filament as viewed from the front, and the lower end angle of the shear bottom of the high beam filament at the lower end shear angle of the low beam filament as viewed from the side At the top end of the low beam filament as viewed from the extension line Since it is disposed in the shading area partitioned from the extension line passing through the upper end angle of the rear end of the high beam filament, when the low beam filament is turned on, it receives the light from the low beam filament due to the light blocking effect of the high beam filament. Without work, therefore, there is no relationship with the virtual glare light.

In this way, the headlamp of the present invention can cope with both the light source bulb for the left passage segment and the light source bulb for the right passage segment by the same light source bulb.

Next, the present invention (invention according to Claim 2) is characterized in that the third support wire passes through the left end of the high beam filament from the left end of the low beam filament when the light source bulb in the initial state is seen from the front, and the low beam filament. It is arranged between the extension line passing from the right end of the high beam filament to the right end of the high beam filament, and when the light source bulb in the initial state is viewed from the side during the front end of the third support wire, A light source bulb in which a portion in front of the extension line passing through the rear end upper angle of the filament is bent into a curved surface for diffusing light from the low beam filament is used.

As a result, the headlamp of the present invention uses the light source bulb having the above-described configuration, and rotates the light source bulb in the initial state to the right around the central axis of the low beam filament, thereby serving as the light source bulb for the right passage segment. As a light source bulb for the left-handed passage, rotated in the direction, the extension line passing from the left end of the low beam filament to the left end of the high beam filament when viewed from the front during the front end of the third support wire, and when viewed from the front Between the right end of the low beam filament and the extension line passing through the right end of the high beam filament, and the extension line passing through the upper end angle of the rear end of the high beam filament as viewed from the side and the low as viewed from the side From the upper end angle of the rear end of the beam filament, The curved bent portion disposed in the semi-shielding area partitioned from the extension line receives the irradiated light from the low beam filament, but it is micro-area, and furthermore, it is irrelevant to the virtual glare light by the light diffusing action of the bent surface. do.

In addition, since the portion at the rear end side of the third support wire is not visible from the reflecting surface of the reflecting mirror due to the incident angle of the irradiation light from the low beam filament, it is irrelevant to the virtual image glare light.

Further, since the portion on the front end side of the third support wire is disposed in the light shielding area, the light shielding effect of the high beam filament is not related to the virtual glare light as described above.

In this way, the headlamp of the present invention can cope with both the light source bulb for the left passage segment and the light source bulb for the right passage segment by the same light source bulb.

Finally, the present invention (explanation concerning claim 3) is, when the front end of the second support wire is viewed from the side of the light source bulb in the initial state, it is bent backward than the rear end of the high beam filament, and the second support wire The lower end of the front end portion is characterized in that the light source bulb is used, which is located above the lower end of the low beam filament when the light source bulb in the initial state is viewed from the side.

As a result, the headlamp of the present invention uses the light source bulb having the above-described configuration, and rotates the light source bulb in the initial state to the right around the central axis of the low beam filament to serve as the light source bulb for the right passage segment, and also to the left direction. The second support wire is located above the lower end of the low beam filament even when used as the light source bulb for the left passage division, respectively, so that it is irrelevant to the virtual glare light.

In addition, since the front end portion of the second support wire is bent rearward than the rear end of the high beam filament, the front end portion of the second support wire is farther than the filament (low beam filament), so that the amount of irradiation and irradiation area from the filament is reduced. Furthermore, since the front end part of the 2nd support wire is bent and folded, the welding area with a 3rd lead wire becomes large, and sufficient welding strength is obtained.

In this way, the headlamp of the present invention can cope with both the light source bulb for the left passage segment and the light source bulb for the right passage segment by the same light source bulb.

Embodiment of the Invention

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of the headlamp of this invention is described with reference to FIGS. 11-25 and the eastern part indicate the same thing in the figure. Moreover, the city's headlights are equipped on the left side of the car in the right side passage. In addition, the headlights mounted on the vehicle of the left-hand traffic segment are the headlights of the city and the left and right stations. Moreover, the headlights on the right side of the car are almost symmetric to the city's headlights.

The light source bulb 500 used in the headlamp of this invention of this embodiment is 4th lead wire LW4 and 3rd support wire SW3 arrange | positioned on condition of the following as shown to FIG. 1 and FIG. And a second support wire SW2.

That is, the fourth lead wire LW4 is wired from the front end of the high beam filament 52 to the rear end side when the light source bulb 500 in the initial state is viewed from the side, and the fourth lead wire ( LW4 is an extension line L1 passing from the left end 51L of the low beam filament 51 to the left end 52L of the high beam filament 52 when viewed from the front of the light source bulb 500 in the initial state, and the row. It is disposed between the right end 51R of the beam filament 51 and the extension line L2 passing through the right end 52R of the high beam filament 52, and the front end of the fourth lead wire LW4 is initially When viewed from the side, the light source bulb 500 in the state is positioned behind the extension line L3 passing from the front lower end angle 52AD of the high beam filament 52 to the front lower end angle 51AD of the low beam filament 51. That is, the bending angle of the bending part LW40 of the front end of the 4th lead wire LW4 is extended as mentioned above. It becomes larger than the angle (psi) formed with L3 and the straight line (straight line which passes perpendicularly to the optical axis Z-Z and passes through the front end 52A of the high beam filament 52) L4. In this example, the bending angle is ψ.

Next, when the third support wire SW3 is viewed from the front of the light source bulb 500 in the initial state, the left end 52L of the high beam filament 52 is formed from the left end 51L of the low beam filament 51. It is arrange | positioned between the extension line L1 which passes and the extension line L2 which passes the right end 52R of the high beam filament 52 from the right end 51R of the low beam filament 51, and the 3rd support wire ( Extension line passing from the rear end lower angle 51BD of the low beam filament 51 to the rear end upper angle 52BU of the high beam filament 52 when the light source bulb 500 in the initial state is viewed from the side during the front end of SW3). The portion SW30 in front of the L5 is bent to a curved surface to diffuse the light from the low beam filament 51. In other words, the bending angle of the bent portion SW30 at the front end of the third support wire SW3 is the extension line (the rear end of the high beam filament 52 from the rear end upper end 51BU of the low beam filament 51 when viewed from the side surface). It becomes larger than the angle (ω) formed with the extension line L6 passing through the upper end angle 52BU and the straight line (vertical line perpendicular to the optical axis ZZ and at the same time passing through the rear end 51B of the low beam filament 51) L7. have. In this example, the bending strength ω is set so that the front portion SW30 of the third support wire LW3 is disposed between the extension line L5 and the extension line L6.

Finally, when the front end portion SW20 of the second support wire SW2 is viewed from the side of the light source bulb 500 in the initial state, it is perpendicular to the rear end 52B of the high beam filament 52 (vertical to the optical axis ZZ, At the same time, it is bent at an acute angle backward from the straight line L9 passing through the rear end 52B of the high beam filament 52, and the lower end of the front end SW20 of the second support wire SW2 is in an initial state. The light source bulb 500 is located above the extension line L8 from the lower end 51D of the low beam filament 51 when viewed from the side.

Furthermore, the rear end of the third support wire SW3 is fixed to the lowermost installable portion of the bridge 57 as shown in FIGS. 1 and 4. In addition, the rear end fixed to the bridge 57 among the first, second, and third support wires SW1, SW2, and SW3 cannot be brought close to each other in manufacturing the light source bulb.

In this embodiment, the headlamp of this invention consists of the above structures, and the effect | action is demonstrated below.

First, as shown in FIG. 5, the light source bulb of the present invention in the initial state of (C) (the state in which the low beam filament 51 and the high beam filament 52 are on the vertical axis VU-VD) The light source bulbs 500, 500R (high beam filaments 52) for the headlamps of the right-hand section of (R) are rotated about the central axis of the low beam filament 51, and the low beam filaments 51 Of the light source bulb (500,500L) (high beam filament 52) for the headlight of the left-hand section of (L) is rotated to the left, and rotated to the left. As a light source bulb located obliquely downward to the left as viewed from the driver's side of the beam filament 51, respectively, the third support wire SW3 and the fourth lead wire (as indicated by (R) and (L)) are used. LW4) is located below the lower end portion 51D of the low beam filament 51. In this case, even in such a case, the portion of the front end of the fourth lead wire LW4 from the front end to most of the rear end of the low beam filament 51 when viewed from the front, as shown in FIGS. 1 and 2. An extension line L1 passing from the left end 51L to the left end 52L of the high beam filament 52 and the right end of the high beam filament 52 from the right end 51R of the low beam filament 51 as viewed from the front ( Extension line L3 passing through the front lower end angle 52AD of the high beam filament 52 from the front lower end angle 51AD of the low beam filament 51 when viewed from the side and between the extension line L2 passing through 52R. ) And a light shielding area partitioned between an extension line L6 passing through the upper end angle 52BU of the rear end of the low beam filament 51 and the rear end upper angle 52BU of the high beam filament 52 as viewed from the side. Since it is disposed in (C), the low beam filament 51 By the light-shielding effects of the high-beam filament (52) for a time of lighting it does not receive the light irradiated from the low-beam filament (51). Therefore, it is not related to the virtual glare light.

On the other hand, as shown in FIGS. 1 and 2, during the front end of the third support wire SW3, the left end 51L of the high beam filament 52 from the left end 51L of the low beam filament 51 when viewed from the front ( Between the extension line L1 passing through 52L and the extension line L2 passing from the right end 51R of the low beam filament 51 when viewed from the front to the right end 52R of the high beam filament 52, and the side surface. An extension line L5 passing from the rear end lower angle 51BD of the low beam filament 51 as seen from the upper end to the rear end upper angle 52BU of the high beam filament 52, and the low beam filament 51 as viewed from the side. Curved portion SW30 disposed in the semi-shielding area C ′ partitioned from the rear end top angle 51BU of the high beam filament 52 to the extension line L6 passing through the rear end top angle 52BU of the high beam filament 52. ) Is the low beam filament 51 when the low beam filament 51 is turned on. Although irradiated with light, it has a small area and is not related to the virtual glare light due to the light diffusing action of the bent surface.

Further, the portion of the rear end side of the third support wire SW3 than the semi-shielding area C '(extension line L5) is configured to emit irradiation light from the low beam filament 51 when the low beam filament 51 is turned on. Although it does not appear to shine from the reflecting surface 40 of the reflecting mirror 4 by the incident angle of the irradiation light from the low beam filament 51, it is irrelevant to the virtual image glare light.

1 and 2, since the second support wire SW2 is located above the extension line L8 from the lower end 51D of the low beam filament 51, the second support wire SW2 has a relationship with the virtual glare light. none.

In addition, the front end portion SW20 of the second support wire SW2 is bent at an acute angle behind the rear end 52B (straight line L9) of the high beam filament 52, so that the front end of the second support wire SW2 thereof. Since the portion SW20 is farther from the filament (the filament 51 for the low beam), the dose and the irradiation area from the filament are reduced, which is irrelevant to the virtual glare light.

As described above, in this embodiment, the headlamp of the present invention uses the light source bulb 500 of the above-described configuration so that the same light source bulb 500 has a light source bulb 500L for the headlight of the left traffic segment and a headlight for the right traffic segment. It can respond to both the light source bulb 500R for dragons.

Moreover, in the headlamp of this invention of this embodiment, the 3rd lead wire LW3 receives the irradiation light from the low beam filament 51 at the time of lighting of the low beam filament 51 as shown in FIG. Reflector 4 that distributes the virtual glare light as shown in FIG. 6 in the state where the light source bulb 500 is rotated to the left and right to be the light source bulbs 500L and 500R for the headlamps for the left and right traffic segments. Is hardly visible from the maximum intensity band forming portion (not shown) of the reflecting surface 40 of FIG. 2), and even if a part is seen, the third lead wire LW3 is above the lower end 51D of the low beam filament 51. By being located in, it is deviated downward from the point (zone) which strictly limits the glare light of the European light distribution standard (ECEReg.), So that it is not a problem virtual light glare.

Furthermore, in the headlamp of the present invention of this embodiment, since the front end portion SW20 of the second support wire SW2 is bent, the welding area with the third lead wire LW3 becomes large, and sufficient welding strength is obtained. .

7 and 8 show a modification of the headlamp of the present invention in this embodiment.

In this modification, the curved portion SW300 of the third support wire SW3 is bent at an obtuse angle.

This modified example can achieve the same effects as those of the above-described embodiment. For example, the curved portion SW300 of the third support wire SW3 located in the semi-shielding area C 'is similar to the curved portion SW30 of the third support wire SW3 of the above-described embodiment. It is micro-area, and furthermore, due to the light diffusing action of the bent surface, it is not related to the virtual glare light.

In addition, since the front end side portion of the third support wire SW3 is disposed in the light shielding area C, the light shielding effect of the high beam filament 52 is not applied to the light shielding area C '. It has nothing to do with virtual glare light.

In particular, since the curved portion SW300 of the third support wire SW3 is bent at an obtuse angle, this modified example can be easily bent by the bending machine. For example, when the bending width is small and folded at an acute angle at the same time, bending by the bending machine is a very strict condition, but in this modified example, the bending condition by the bending machine is considerably alleviated.

Here, specific examples of the light distribution pattern of the headlamp using the light source bulb 500 of the present invention described above will be described with reference to FIGS. 9 and 10.

First, the size of the reflecting surface 40 of the reflecting mirror 4 is 90 mm x 180 mm x 85 mm, and the pseudo focus value of the reflecting surface 40 of the reflecting mirror 4 is 25 mm.

The condition of the light source bulb 500 is that the length of the low beam filament 51 is 5.5 mm, the diameter of the low beam filament 51 is ø1.5 mm, the amount of luminous flux of the low beam filament 51 is 860 lm, and the high beam filament ( The length of 52) is 5.0 mm, the diameter of the high beam filament 52 is ø1.3 mm, the amount of luminous flux of the high beam filament 52 is 1300 lm, and the diameter of the glass tube 50 is ø16 mm. The condition of the light source bulb 5 is one example that is empirically appropriately and realistically obtained in consideration of the service life, light quantity, manufacturability, usability and performance maintainability of a headlamp for an automobile, and the light flux amount is a value at 12V voltage.

Further, in the line segment connecting the low position filament 51 and the high beam filament 52, that is, the center of the low beam filament 51 and the center of the high beam filament 52 when viewed from the front, The angle θ to the horizontal line HL-HR is 20 ° and the distance T1 from the center of the low beam filament 51 to the center of the high beam filament 52 when viewed from the front is 2.8 mm, when viewed from the side. The distance T2 in the front-rear direction from the center of the low beam filament 51 to the center of the high beam filament 52 is 2.5 mm. This condition is only one example.

Further, the bending angle (angle formed between the extension line L3 and the straight line L4) Ψ of the bent portion LW40 at the front end of the fourth lead wire LW4 is 45 °.

In the case where the light source bulb 500 and the reflecting surface 40 of the reflecting mirror 4 are used, the illuminance curve LA in the right passage section of FIG. 9 is a light distribution pattern for low beam, and B is for high beam. Fig. 10 shows the difference in performance between the light distribution pattern of Fig. 10 and the light intensity curve CA in the left passage segment of Fig. 10, the light distribution pattern for low beam, and (B) the light distribution pattern for high beam. Invisible

Furthermore, in the above-described embodiment, the curved portions SW30 and SW300 of the third support wire SW3 are disposed in the semi-shielding area C '(and the shielding area C), but the headlamp of the present invention In the case of disposing the curved portions SW30 and SW300 of the third support wire SW3 in the semi-shielding area C '(and the shielding area C) as in the above-described embodiment, the work clearance of the wire bonding machine is In addition, the curved bent portions SW30 and SW300 of the third support wire SW3 are located behind the semi-shielding area C '(the one on the bridge 57 side, and the sealing hole of the glass tube 50 is shown). In the case of (not on the side of Fig. 1), any problem can be established unless there is a problem with the virtual glare deposit.

In the above-described embodiment, the first, second, and third support wires SW1, SW2, and SW3 are fixed to the bridge 57. However, the above-mentioned bridge 57 is connected due to the manufacturing equipment of the light source bulb. It may be omitted.

Furthermore, in the above-described embodiment, the predetermined low beam light distribution pattern LP and the high beam light distribution pattern HP are controlled by the front reflection light distribution of the reflecting surface 40, so that the lens 2 is clearly visible. Or a diffusing optical element group (so-called diffusion prism element group) or the like.

Moreover, in the above-mentioned embodiment, although the reflecting mirror 4 which has the lamp housing 1 and the reflecting surface 40 was demonstrated about the example of a separate body, the headlamp of this invention applies also to the thing in which a lamp housing and a reflecting mirror are integral. can do.

In particular, the light source bulb 500 used for the headlamp of the present invention may be used only for the left traffic division or for the right traffic division. Even in this case, it is within the scope of the headlamp of the present invention.

As is apparent from the above, the headlamp of the present invention has no problem of virtual glare light and can cope with both the light source bulb for the left passage division and the light source bulb for the right passage division with the same light source bulb.

Claims (3)

The lamp compartment and the lens are partitioned by a lamp housing, and a light source bulb and a reflector are disposed in the lamp compartment, and the light bulb has a high beam filament disposed obliquely below the low beam filament, and the reflector is a composite panel. When the low beam filament is turned on and the low beam filament is turned on, a predetermined light distribution pattern of the low beam is formed by the front reflection light distribution of the reflective surface. When the high beam filament is turned on, the reflective surface is turned on. In a headlamp in which a predetermined high beam light distribution pattern is formed by front reflective light distribution of The light source bulb, The front end of the low beam filament is supported by the first lead wire and the first support wire, and the rear end of the low beam filament and the rear end of the high beam filament are the second lead wire, the third lead wire and the second support wire. The front end of the high beam filament is supported by the fourth lead wire and the third support wire, The first, second, third and fourth lead wires and the first, second and third support wires are arranged on a line connecting the low beam filament and the high beam filament, A light source bulb for use in which the high beam filament is disposed obliquely below the low beam filament, The fourth lead wire is wired from the front end of the high beam filament to the rear end side when the light source bulb in the initial state is viewed from the side, and the fourth lead wire is connected to the light source bulb in the initial state. As viewed from the front, it is disposed between an extension line passing from the left end of the low beam filament to the left end of the high beam filament and an extension line passing from the right end of the low beam filament to the right end of the high beam filament, In addition, the front end of the fourth lead wire is located behind the extension line passing from the front lower end angle of the high beam filament to the lower end angle of the high beam filament when the light source bulb in the initial state is viewed from the side. The bending angle of the bent portion of the front end of the fourth lead wire is extended from the lower end angle of the front end of the low beam filament and the straight end angle of the front end of the high beam filament (perpendicular to the optical axis and passing through the front end of the high beam filament). Larger than the angle with the straight line) The fourth lead wire is a headlight, characterized in that the light source bulb which is not related to the virtual glare light is used when the filament for low beams is turned on. The lamp compartment and the lens are partitioned by a lamp housing, and a light source bulb and a reflector are disposed in the lamp compartment, and the light bulb has a high beam filament disposed obliquely below the low beam filament, and the reflector is a composite panel. When the low beam filament is turned on and the low beam filament is turned on, a predetermined light distribution pattern of the low beam is formed by the front reflection light distribution of the reflective surface. When the high beam filament is turned on, the reflective surface is turned on. In a headlamp in which a predetermined high beam light distribution pattern is formed by front reflective light distribution of The light source bulb, The front end of the low beam filament is supported by the first lead wire and the first support wire, and the rear end of the low beam filament and the rear end of the high beam filament are the second lead wire, the third lead wire and the second support wire. The front end of the high beam filament is supported by the fourth lead wire and the third support wire, The first, second, third and fourth lead wires and the first, second and third support wires are arranged on a line connecting the low beam filament and the high beam filament, A light source bulb for use in which the high beam filament is disposed obliquely below the low beam filament, The third support wire passes through an extension line passing from the left end of the low beam filament to the left end of the high beam filament and the right end of the high beam filament from the left end of the low beam filament when the light source bulb in the initial state is viewed from the front. It is arrange | positioned with extension line, Further, when the light source bulb in the initial state is viewed from the side of the front end of the third support wire, the portion in front of the extension line passing from the lower end angle of the rear end of the low beam filament to the rear end upper angle of the high beam filament is the row The curved portion bent into a curved surface for diffusing light from the beam filament, and the curved portion arranged in the semi-shielding area is irrelevant to the virtual glare light by the light diffusion effect. The third support wire is a headlight, characterized in that the light source bulb which is not related to the virtual glare light is used when the filament for low beams is turned on. The lamp compartment and the lens are partitioned by a lamp housing, and a light source bulb and a reflector are disposed in the lamp compartment, and the light bulb has a high beam filament disposed obliquely below the low beam filament, and the reflector is a composite panel. When the low beam filament is turned on and the low beam filament is turned on, a predetermined light distribution pattern of the low beam is formed by the front reflection light distribution of the reflective surface. When the high beam filament is turned on, the reflective surface is turned on. In a headlamp in which a predetermined high beam light distribution pattern is formed by front reflective light distribution of The light source bulb, The front end of the low beam filament is supported by the first lead wire and the first support wire, and the rear end of the low beam filament and the rear end of the high beam filament are the second lead wire, the third lead wire and the second support wire. The front end of the high beam filament is supported by the fourth lead wire and the third support wire, The first, second, third and fourth lead wires and the first, second and third support wires are arranged on a line connecting the low beam filament and the high beam filament, A light source bulb for use in which the high beam filament is disposed obliquely below the low beam filament, The front end of the second support wire is bent backward from the rear end of the high beam filament when the light source bulb in the initial state is viewed from the side. The lower end of the front end of the second support wire is located above the lower end of the low beam filament when the light source bulb in the initial state is viewed from the side, and is bent at an acute angle behind the rear end of the high beam filament. There is, The second support wire is a headlight, characterized in that the light source bulb which is not related to the virtual glare light is used when the filament for low beams is turned on.