JP2562643Y2 - Vehicle lighting - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention provides a lens having a prism having a columnar prism, and a clearance in which a ridgeline of a boundary between a reflection surface and a dummy portion of the reflection surface is oblique to the axial direction of the columnar prism of the lens. Related to vehicle lamps such as lamps,
In particular, the present invention relates to a vehicular lamp in which the ridgeline can be seen almost linearly to improve the appearance.

[0002]

2. Description of the Related Art A conventional vehicle lamp will be described below with reference to FIGS. In this example, a clearance lamp on the front side and on the left side as viewed from the driver, which has a wraparound portion from the front to the side, will be described. FIGS. 5 and 6 are cross-sectional views of a conventional vehicle lamp (clearance lamp).
FIG. 8 is a cross-sectional view corresponding to a cross section taken along line VV and a cross section taken along line VI-VI in FIG. 7. In the figure, B indicates a part of the vehicle body of the vehicle equipped with the lamp, and arrow F indicates the traveling direction of the vehicle. 1 is a lamp housing,
A straight outer lens 4 as a front lens and an inner lens 7 having, for example, a cylindrical convex prism 71 are attached so as to cover the front opening of the lamp housing 1. In the outer lens 4 and the inner lens 7 of this example, the right side of the figure is closer to the center of the vehicle body, and the left side of the figure is closer to the vehicle body side. Portions of the outer lens 4 and the inner lens 7 near the center of the vehicle body (for example, near point a) face obliquely forward with respect to the traveling direction F, but portions closer to the vehicle body side (for example, near points b and d) are closer to the vehicle body. It has a shape that wraps around. The outer lens 4 has an adhesive leg 4
0 is adhesively sealed and fixed to an adhesive concave portion 10 of the housing 1 by a hot melt 11 or the like. On the other hand, the inner lens 7 has, for example, a cylindrical fixing leg (not shown) fixed to a fixing recess (not shown) of the housing 1 by a clip or the like (not shown). As described above, the lamp chamber 100 is defined by the lamp housing 1, the outer lens 4, and the inner lens 7. In addition,
The prism of the above-mentioned inner lens 7 may be other than the above-mentioned cylindrical convex shape.

A light source bulb 3 is mounted on a socket 2 fixed to the lamp housing 1. As a result, the light source bulb 3 is disposed at a predetermined position in a lamp room 100. A cap 6 is arranged around the light source bulb 3. The cap 6 is provided with a prism 60 on the outer surface, and a fixed leg (not shown) provided integrally is fixed to a fixing recess (not shown) of the lamp housing 1 by a clip or the like (not shown). Have been.

[0004] Inside the lamp housing 1, a reflector 5 is disposed, for example, as a reflection surface of a paraboloid of revolution. The reflector 5 reflects light from the light source bulb 3 to the inner lens 7 side. Although the above-mentioned reflector 5 is formed separately from the housing 1, instead of the separate reflector 5, a reflecting surface such as a paraboloid of revolution is directly provided on the inner surface of the lamp housing 1. May be.

In such a vehicular lamp, the lamp housing 1 has a reflection ineffective portion at a lower end. This reflection-ineffective portion is located, for example, on a surface of the paraboloid of revolution that intersects with the reflection surface of the reflector 5, and does not have a function of reflecting light from the light source bulb 3 toward the inner lens 7, This is caused by the molding of the above-described vehicle lamp. The dummy portion 8 of the reflective surface is formed by providing a reflective surface such as aluminum vapor deposition on the surface of the reflection ineffective portion.

Thus, when the light source bulb 3 is turned on, the light emitted from the light source bulb 3 is reflected by the reflector 5 through the cap 6, and the light reflected by the reflector 5 passes through a predetermined light distribution when passing through the inner lens 7. It is adjusted to a pattern and radiated to the outside via the outer lens 4.

[0007]

However, in the above-described conventional vehicle lighting device, the linear ridge 80 at the boundary between the reflector 5 (reflection surface) and the dummy portion 8 is formed by the inner lens 7.
Are obliquely provided with respect to the axial direction of the cylindrical convex prism 71, and when the oblique ridge line 80 is viewed through the cylindrical convex prism 71 of the inner lens 7,
As shown by the solid line in FIG. 12, each of the cylindrical convex prisms 71 of the inner lens 7 appears to meander, and thus has a problem in appearance. This is because the point at which the ridgeline 80 is visible shifts due to a shift in the refraction position of the light transmitted through the inner lens 7 due to a difference in the thickness of the inner lens 7. When the ridgeline 80 is perpendicular to or in the same direction as the axial direction of the cylindrical convex prism 71 of the inner lens 7, when the ridgeline 80 is viewed through the inner lens 7 of the cylindrical convex prism 71, the ridgeline 80 Looks almost linear.

Hereinafter, the shift of the visible point of the ridge line 80 will be described in detail with reference to FIGS. The optical path arrow A0 in FIG. 10 and FIG.
A1, arrow B0 → B1, arrow C0 → C1, arrow D0 → D
1, the arrows E0 → E1 are shown substantially parallel, but actually form a fan shape centered on the human eye (eye point). First, the oblique ridgeline 80 (points A, B, C,
D, E) through the transparent inner lens 70 without the cylindrical convex prism 71 (points A0, B0, C
0, D0, E0), as shown in FIG. 11, since the thickness of the inner lens 70 through which light is transmitted is uniform, light is transmitted through arrows A0 → A1 → A2 → A and arrows B0 → B1 →
B2 → B (B2 → B is indicated by a broken line), arrow C0 → C
1 → C2 → C (C2 → C is indicated by a broken line), arrow D0
Since the process proceeds in the order of → D1 → D2 → D (D2 → D is indicated by a broken line) and arrows E0 → E1 → E2 → E, the oblique ridge line 80 looks straight as shown by the broken line in FIG. There is no particular problem in appearance. However, as shown in FIG. 10, the oblique ridge line 80 (points A, B, C, D, and E) passes upward through the cylindrical convex prism 71 of the inner lens 7 (points A0, B0, C0, D0, and E0). ), The thickness of the inner lens 7 through which the light is transmitted differs, so that the light is transmitted through the arrows A1 → A2, the arrows B1 → B3, and the arrow C1.
The light passes through the inner lens 7 in the order of → C3, arrow D1 → D3, arrow E1 → E2. For this purpose, as shown in FIG. 11, the refraction positions B2, C2, and D2 of the light transmitted through the transparent inner lens 70 and the refraction position B3 of the light transmitted through the inner lens 7 having the cylindrical convex prism 71. , C
3 and D3, respectively. As a result, the light is shifted by arrows A0 → A1 → A2 → A, arrows B0 → B
1 → B3 → B4, arrow C0 → C1 → C3 → C4, arrow D
0 → D1 → D3 → D4, arrow E0 → E1 → E2 → E, so that the ridgeline 80 passes through the transparent inner lens 70.
Points B, C, and D, and a cylindrical convex prism 7
At the points B4, C4, and D4 where the ridgeline 80 can be seen through the inner lens 7 having a 1, each shift occurs. As a result of the above, when the oblique ridge line 80 is viewed through the inner lens 7 having the cylindrical convex prism 71,
As shown by the solid line in FIG. 12, each cylindrical convex prism 71 of the inner lens 7 appears to meander.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicular lamp in which a ridgeline looks almost straight and the appearance can be improved.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a dummy portion having a refraction position of light passing through the lens so that a ridgeline looks almost straight through the lens. A position correcting columnar portion is provided in which the position of the ridge line is previously shifted by an amount corresponding to the shift of the point at which the ridge line is visible.

[0011]

According to the present invention, when the ridgeline at the boundary between the dummy portion and the reflecting surface is viewed through the lens, the ridgeline which has been shifted in advance by the position correcting columnar portion is transmitted through the lens. The deviation of the refraction position of the reflected light cancels out the deviation of the point where the ridgeline is visible, so that the ridgeline looks almost straight through the lens. Therefore, the appearance is better than that of a conventional vehicle lamp in which the ridgeline appears to meander.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vehicular lamp according to an embodiment of the present invention; FIG. In this example, a clearance lamp on the front side and on the left side as viewed from the driver, which has a wraparound portion from the front to the side, will be described. In the figures, FIGS.
The same reference numerals denote the same components. In the drawing, reference numeral 9 denotes a columnar portion provided on the dummy portion 8 for position correction. The columnar portion 9 for correcting the position is provided with a ridge 900 through the inner lens 7.
The point (A, B) at which the ridge line 900 is visible due to a shift in the refraction position of the light transmitted through the inner lens 7 so that (indicated by a solid line in FIG.
1, C1, D1, E), the edge 90
(Indicated by broken lines in FIG. 4) (A, B, C, D, E)
The inner lens 7 is provided substantially parallel to and corresponding to the cylindrical convex prism 71 of the inner lens 7. That is, the columnar portion 9 for position correction adjusts its curvature to the curvature of the cylindrical convex prism 71 of the inner lens 7 and its pitch to the pitch of the cylindrical convex prism 71 of the inner lens 7. . The position correcting columnar portion 9 is formed by a plurality of step-like knurling processes.

The vehicular lamp according to the present invention in this embodiment has the above-described configuration, and its operation will be described below. Although the optical path in FIG. 3 is illustrated as being substantially parallel, it actually has a fan shape centered on the human eye (eye point). First, as shown in FIG. 3 and FIG. 4, a ridgeline 90 (points A, B, C, D, and E) obliquely crossing an arc is formed for each cylindrical convex prism 71 of the inner lens 7. It is viewed from above (points A0, B0, C0, D0, E0) through the convex prism 71.
Then, the vehicular lamp of the present invention has a columnar portion 9 for position correction.
As a result, the point (A, B4, C4, D4, E) at which the ridgeline 900 can be seen due to a shift in the refraction position of the light transmitted through the inner lens 7 so that the ridgeline 900 looks substantially linear through the inner lens 7. Since the position (A, B, C, D, E) of the ridgeline 90 has been shifted in advance by the amount of the shift, the position (A, B, C) of the ridgeline 90 shifted in advance by the columnar portion 9 for correcting the position. , D, E) and the refraction position of the light passing through the inner lens 7, the points (A, B4, C4, D4,
E) will cancel each other out. As a result, as shown in FIG. 4, when a ridgeline 90 (indicated by a broken line) obliquely crossing in an arc shape for each cylindrical convex prism 71 of the inner lens 7 is seen through the inner lens 7, the ridgeline 9 is obtained.
00 (shown by a solid line) appears almost linearly through the inner lens 7. That is, when the straight ridgeline (900) is viewed through the inner lens 7, the ridgeline 80 appears to be shifted and meandering like a conventional vehicle lamp as shown by a two-dot chain line in FIG. By shifting the position of the ridge line 90 in advance by the amount of this shift, when the ridge line 90 is viewed through the inner lens 7, as shown in a straight line in FIG.
00 appears almost linear. Therefore, the appearance is better than that of a conventional vehicle lamp in which the ridgeline appears to meander.

In the above-described embodiment, the clearance lamp on the front side and on the left side as viewed from the driver, which has a wraparound portion from the front to the side, has been described. The present invention can be applied to a vehicle lamp. Further, in the above-described embodiment, the shape of the column portion 9 for correcting the position has a cylindrical convex shape, but may be other than the cylindrical convex shape according to the shape of the prism 71 of the inner lens 7. Further, in the above-described embodiment, the outer lens 4 having the transparent outer lens 4 and the inner lens 7 having the cylindrical convex prism 71 is provided.
Although the double lens structure has been described, the present invention can also be applied to a single lens structure or a triple lens structure.

[0015]

As described above, the vehicular lamp according to the present invention includes a dummy portion having a ridge line formed by a shift of a refraction position of light transmitted through the lens so that the ridge line looks substantially straight through the lens. Since the position of the ridge line is shifted in advance by the position of the visible point, a columnar portion for position correction in which the position of the ridge line is shifted in advance is provided. The displacement of the position of the ridge line that is previously displaced in the columnar portion and the displacement of the point where the ridge line is visible due to the displacement of the refraction position of the light transmitted through the lens mutually cancel each other, so that the ridge line is almost linearly passed through the lens. appear. Therefore, the appearance is better than that of a conventional vehicle lamp in which the ridgeline appears to meander.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a vehicle lamp (clearance lamp) according to the present invention, in which an outer lens and an inner lens are removed.

FIG. 2 is a sectional view of a main part of an inner lens and a dummy section corresponding to a sectional view taken along line II-II in FIG.

FIG. 3 is an explanatory cross-sectional view showing an optical path in a state where a ridgeline is viewed through an inner lens.

FIG. 4 is an explanatory diagram viewed from the arrow IV in FIG. 3;

5 is a cross-sectional view showing a conventional vehicle lamp (clearance lamp), and is a cross-sectional view corresponding to a cross-sectional view taken along line VV of FIG.

6 is a cross-sectional view showing a conventional vehicle lamp (clearance lamp), and is a cross-sectional view corresponding to a cross-sectional view taken along line VI-VI of FIG. 7;

FIG. 7 is a side view of the housing of the conventional vehicle lamp (clearance lamp) with an outer lens and an inner lens removed.

FIG. 8 is a side view of the inner lens.

FIG. 9 is an enlarged sectional view of an IX part in FIG. 6;

FIG. 10 is an explanatory cross-sectional view showing an optical path in a state where a ridgeline is viewed through an inner lens.

FIG. 11 is an explanatory view taken in the direction of arrow XI in FIG. 10;

FIG. 12 is an explanatory view taken in the direction of the arrow XII in FIG. 10;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lamp housing, 100 ... Light room, 2 ... Socket,
3 light source bulb, 4 outer lens, 5 reflector (reflection surface), 6 cap, 7 inner lens, 71
... Cylindrical prism, 8 ... Dummy portion, 9 ... Position-correcting columnar portion, 90 ... Ridge line whose position is previously shifted to a cylindrical convex shape,
900 ... A ridge that looks almost straight through the inner lens.

Claims (1)

(57) [Scope of request for utility model registration] 1. A housing, a lens having a columnar prism disposed in an opening of the housing, a light source bulb disposed in a lamp chamber defined by the lens and the housing, and light from the light source bulb. And a dummy portion of the reflection surface provided on the housing, and a ridgeline at a boundary between the dummy portion and the reflection surface is inclined with respect to an axial direction of the columnar prism of the lens. In the intersecting vehicle lamp, the dummy portion includes a shift in a refraction position of light transmitted through the lens and a shift in a point at which the ridgeline is visible, so that the ridgeline looks substantially straight through the lens. A vehicular lamp having a columnar portion for correcting a position in which the position of the ridgeline is shifted.