JP2820490B2 - Automotive lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lamp for an automobile, and a so-called external light such as sunlight is reflected in the lamp so that it looks as if the lamp is lit. The present invention relates to an automotive lamp that is effective in preventing false lighting.

(Prior art)

As a conventional technique for preventing false lighting, for example, JP-A-54-156379 can be mentioned. As shown in FIG. 8, lenses 3 and 5 are arranged in front of a reflector 2 that accommodates a bulb 1 and cylindrical convex lens elements 4 and 6 that are orthogonal to each other are arranged on the back side of the lenses 3 and 5. It has a structure in which a light transmitting portion 7 and a light shielding portion 8 are formed on the front surface of the lens 3. Then, the light from the light source is reflected by the reflector 2 to become a parallel light l, and the convex lens element 4
Is transmitted through the light transmitting portion 7 and exits from the lens 3, further passes through the convex lens element 6 of the lens 5 and exits from the lens 5, and is diffused in the left, right, up and down directions. On the other hand, the external light _{11 that} has entered the lamp is prevented from being emitted from the lens 3 by the light shielding portion 8. FIG. 9 shows the shape of the convex lens elements 4 and 6 for easy understanding.
FIG. 2 is a perspective view of a part of the lenses 3 and 5 extracted.

[Problem to be solved by the invention]

However, the above-described structure has a problem that diffused light emitted from the light transmitting portion 7 is vignetted by upper and lower side edges of the light shielding portion 8, so that a predetermined light distribution pattern with sufficient illuminance cannot be obtained. Particularly in recent years, streamlined vehicles have been preferred, and the light-emitting surface tends to be greatly inclined upward so that the lens of the lamp is also continuous with the shape of the vehicle body. The degree of vignetting is remarkable.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems of the related art, and has as its object to provide a vehicular lamp having an effect of preventing a false lighting and obtaining a light distribution pattern with a sufficient illuminance.

[Means for solving the problem]

In order to achieve the above object, in a vehicle lighting device according to the present invention, a front lens has a light emitting surface inclined upward in a front opening portion of a lamp body including a light source and a unit for converting the light source light into parallel light. A band-shaped light-transmitting portion comprising a laterally extending concave portion provided with a light shielding material on the surface of the front lens, and a band-like light shielding portion comprising a laterally extending convex portion. Part and alternately in the vertical direction,
At least in a region corresponding to the light-transmitting portion on the back surface of the front lens, a convex lens element that has an optical axis parallel to the irradiation axis of the lamp and is a diffusion step element that diffuses emitted light in the up, down, left, and right directions is continuous in the lateral direction. The convex lens element row is formed, and the upper and lower side edges of the protruding ridge forming the light shielding portion are cut out in the direction in which light emitted from the light transmitting portion is diffused in the vertical direction.

[Action]

The parallel light that has been reflected by the reflector and entered the diffusion step of the light transmitting portion is focused on the optical axis of the diffusion step, exits from the light transmitting portion, becomes diffused light, and contributes to illumination. Since there is no light-shielding portion on the optical path of the diffused light emitted from the light-transmitting portion, the diffused light travels without vignetting at the light-shielding portion, and most of the light emitted from the light-transmitting portion becomes light effective for light distribution.

In addition, extraneous light that has entered the lamp through the light-transmitting portion of the front lens is reflected in the lamp and enters the front lens. The light-shielding portion prevents the light from being emitted, thereby preventing false lighting.

The upper edge of the ridge forming the light-shielding portion is inclined forward and downward, and the lower edge of the ridge is inclined forward and upward. Water droplets and dust hardly adhere to the concave ridges forming the ridges.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 6 show a rear combination lamp according to an embodiment of the present invention. FIG. 1 is a front view of the lamp, and FIG. 2 is a horizontal sectional view of the lamp (shown in FIG. 1). line
FIG. 3 is an enlarged cross-sectional view of the front lens, illustrating how the light source light is emitted from the lens and how the external light that has entered the lamp is prevented from being emitted. FIG. 4 is an enlarged perspective view of the front lens showing a diffusion step formed on the back surface of the front lens. FIG. 5 is an explanatory diagram for explaining the progress of light passing through the light transmitting portion. FIG. 6 is a sectional view taken along line VI-VI shown in FIG.

In these figures, reference numeral 10 denotes a tarsing null lamp.
This is a front combination lamp on the right side (the right side when viewed from the front of the vehicle) in which the clearance lamp 20 and the clearance lamp 30 are integrated. Reference numeral 12 denotes a container-like lamp body. The lamp body 12 is defined by a vertically extending shade 13 into a lamp body part 22 of a terning null lamp 20 and a lamp body part 32 of a clearance lamp 30. Valves 24 and 34 are inserted into valve insertion holes formed at the rear tops of the portions 22 and 32, respectively. A metal reflector 26 is attached to the inner peripheral surface of the lamp body portion 22, while a reflector 36, which is a reflective painted surface, is integrally formed on the inner peripheral surface of the lamp body 32. And the valve
Parabolic reflectors 26 and 36 convert the light emitted from the filaments 24 and 34 into parallel light (see arrows in FIG. 2) and guide the light forward. An amber inner lens 28 that makes transmitted light a functional color of a turn signal lamp is disposed at a position in front of the bulb of the lamp body 22. At the front opening of the lamp body 12, a clear front lens 50 in which the lens of the turn signal lamp 20 and the lens of the clearance lamp 30 are integrated is mounted.
Reference numeral 14 denotes a seal groove formed on the peripheral edge of the lamp body 12, and reference numeral 51 denotes a seal leg formed on the peripheral edge of the front lens 50.

Reference numeral 18 denotes a stud bolt for fastening the combination lamp 10 to the vehicle body, and protrudes from the rear of the left and right ends of the lamp body 22. On the back side of the lamp body part 22, holes 41 of the vehicle body side bracket 40 are provided at three positions.
(See FIG. 6). A positioning boss 42 for engaging with the boss 42 is formed so as to protrude. Further, a leaf spring 44 is provided at an intermediate position in the vertical direction between the bosses 42 on the left end side and a position below the boss 42 on the right end side. Screw
It is attached and fixed by 46. When the lamp is mounted on the vehicle body, that is, when the stud bolt 18 is fastened to the vehicle body, the boss 42 is engaged with the hole 41 to position the lamp, and the leaf spring 44 is pressed against the vehicle body side bracket 40,
The left end of the lamp and the center of the lamp (the branch between the turn signal lamp and the clearance lamp) are elastically supported in the front-rear direction with respect to the vehicle body.

A reflector 26 is provided on the inner peripheral surface of the lamp body 22.
Are fixed in a close contact state, and a screw 48 for fixing the reflector 26 is screwed into the boss 42. That is,
The boss 42 for positioning the lamp with respect to the vehicle body also functions as a receiving portion for a screw 48 for fixing the reflector. The reflector 26 is positioned by a boss 43 protruding to the front on the reflector forming surface of the lamp body 22, and a screw 46 for fixing a leaf spring is screwed into the boss 43. That is, the boss 43 for positioning the reflector 26
The plate also functions as a receiving portion for the screw 46 for fixing the leaf spring.

As shown in FIG. 3, the front lens 50 has a light-emitting surface inclined upward, and has the same shape as the vehicle body when the lamp 10 is assembled to the vehicle body, so as to form a streamlined shape. Reference numeral 70 denotes a front fender which is a part of the vehicle body, and reference numeral 80 denotes a front bumper which is a part of the vehicle body. On the surface of the lens 50, a strip-shaped light-shielding portion 52 and a light-transmitting portion 58 extending in the horizontal direction (here, the horizontal direction also refers to the horizontal direction of the lens when viewed from the front; the same applies hereinafter) are provided in the vertical direction (here, Are alternately formed in the vertical direction when the lens is viewed from the front, the same applies hereinafter). The light-shielding portion 52 is formed by providing a light-shielding member 56 that has been subjected to painting, hot stamping, or the like, on the surface of a laterally extending trapezoidal ridge 54 formed on the surface of the lens 50. The light transmitting portion 58 is formed by the convex portion 54 and the concave portion between the convex portions 54, and the light incident on the lens 50 from the back side of the lens cannot be emitted from the light shielding portion 52, but is emitted only from the light transmitting portion 58. It is supposed to.

On the other hand, on the back surface of the lens 50, a fish-eye step is formed, which is a diffusion step in which the step elements are arranged in a grid pattern in a regular and longitudinal manner. Then, on the back surface position of the lens corresponding to the light transmitting portion 58, optical axes l ₂ and l ₃ (see FIG. 3, but parallel to the irradiation axes L ₂ and L ₃ (see FIG. 2) of the lamps 20 and 30). reference numeral l ₃ are arranged fisheye step element 60 having not shown) is continuously in the transverse direction. That is, a horizontal parting line 61 that defines each fish-eye step element 60 is formed at a position corresponding to the boundary between the light shielding part 52 and the light transmitting part 58. As shown in FIG. 4, the surface of the fish-eye step element 60 is a condensing lens having a curved surface curved in both the horizontal and vertical directions. For this reason, the light emitted from the bulbs 24 and 34 is reflected by the reflectors 26 and 36 to become parallel light and enters the fish-eye step element 60. The light incident on the element 60 is reflected as shown in FIG. focused on the optical axis l ₂ of each element 60 is diffused is emitted forward from the light transmitting portion 58, which contributes to the light distribution. However, the light L that has entered the lamp from the outside through the light transmitting portion 58 is reflected by the reflector 26 (36) and enters the lens 50, but is blocked by the light shielding portion 52 and cannot be emitted from the lens 50. Therefore, the problem of pseudo lighting does not occur.

Further, the light shielding part 52 and the light transmitting part 58 formed on the lens surface
The upper and lower side edges 54a, 54b of the ridge 54 defining the above are cut out in the vertical diffusion direction of the light emitted from the light transmitting portion 58. In other words, the light emitted from the light transmitting section 58 becomes diffused light due to the light condensing action of the fisheye step element 60.
The side edges of the ridges 54 are cut so that the diffused light emitted from the ridge is not vignetted. More specifically, the light shielding portion 52, the light transmitting portion 58, and the light shielding portion 52 are positioned diagonally forward of the light transmitting portion 58 by the steps corresponding to the steps between the convex and concave portions.
The upper edge 54a of the ridge 54 is notched diagonally forward and downward so that the cut surface faces diagonally upward, while the lower edge 54
b is cut out diagonally forward and upward so that the cut surface is diagonally downward. The cut-out portions are indicated by reference numerals 54a ₁ and 54b ₁ in FIG. For this reason, the light transmission part 5
Since the upper and lower side edge portions of the convex portions 54 located on the optical path of the emitted light to be diffused from 8 (see Fig. 5 reference numeral 54a _1, 54b ₂₎ are cut, what to block the emitted light diffusing There is nothing, the emitted light travels without vignetting on the ridges 54, and a predetermined light distribution pattern with sufficient illuminance is obtained. In addition, since the upper edge 54a of the light-shielding portion 52 that protrudes forward compared to the light-transmitting portion 58 is inclined forward and downward, there is also an effect that water droplets and dust are less likely to adhere to the light-transmitting portion 58.

In addition, the color of the light shielding member 56 is set to a color that matches the color of the vehicle body, such as black if the color of the vehicle body is black, red if the color of the vehicle body is black, and a color in which the vehicle body and the lamp are integrated in color. Has become.

FIG. 7 is an enlarged longitudinal sectional view of a front lens which is a main part of another embodiment of the present invention.

In this figure, the rear surface of the front lens 50A
Although a fisheye step is formed at the position corresponding to 8,
A flat surface 64 may be formed at a position corresponding to the light shielding portion 52. Further, the horizontal parting lines 61, which are the upper and lower peripheral portions of the fisheye step element 60, are not located at positions corresponding to the boundaries between the light transmitting portions 58 and the light shielding portions 52, as shown in the first embodiment. It is formed at a position offset to the light shielding portion 52 side. That is, the fish-eye step element 60 and the light shielding unit 52 are
Are arranged so as to overlap the ranges indicated by reference symbols t ₁ and t ₂ in the direction of the optical axis l ₂ . This is because the surface of the fisheye step element 60 may not be a curved surface as designed, and in such a case, the deformation is more remarkable near the parting line. However, if the horizontal parting line 61 extending in the lateral direction is formed at a position corresponding to the light shielding part 52 as in this embodiment, the horizontal parting line is formed.
Light transmitted in the vicinity of 61 is blocked by the light-shielding portion 52, and only light transmitted in the central region of the fisheye step element 60 with little deformation passes through the light-transmitting portion 58 and contributes to light distribution. A light distribution pattern that does not significantly deviate from the light distribution pattern is formed.

In the above-described embodiment, the light from the bulbs 24 and 34 is parallelized by the reflectors 26 and 36 so as to be guided to the front lens 50.However, as means for collimating the light from the light source, the direct light from the bulb is parallelized. A parallel light may be formed by an inner lens provided with a lens step (Fresnel step).

It should be noted that the above-described embodiment is an example of a specific embodiment of the present invention, and the present invention is not limited to these, and various modifications are possible within a technically equivalent range. is there.

〔The invention's effect〕

As is clear from the above description, according to the automotive lamp according to the present invention, the light-shielding portion formed on the front lens surface prevents the external light that has entered the lamp from being emitted from the lens. Is prevented. Also, since the diffused light emitted from the light-transmitting portion travels without vignetting at the light-shielding portion, most of the light emitted from the light-transmitting portion contributes to the light distribution, and a predetermined light distribution with sufficient illuminance is obtained. Can be

Further, since the upper edge of the ridge forming the light shielding portion is inclined forward and downward, and the lower edge of the ridge is inclined forward and upward, water droplets and dust adhere to the light-transmitting portion, and the light is distributed. Light is not obstructed.

[Brief description of the drawings]

FIG. 1 is a front view of a rear combination lamp according to an embodiment of the present invention, and FIG. 2 is a horizontal sectional view of the lamp (first embodiment).
FIG. 3 is an enlarged longitudinal sectional view of the front lens, FIG. 4 is an enlarged perspective view of the front lens showing a diffusion step formed on the back surface of the front lens, FIG.
The figure is an enlarged longitudinal sectional view showing a part of the front lens, and is an explanatory view for explaining the progress of light passing through the light transmitting part. FIG. 6 is a sectional view taken along the line VI-VI shown in FIG. FIG. 7 is an enlarged sectional view of a main part of another embodiment of the present invention, FIG. 8 is a longitudinal sectional view of a conventional lamp, and FIG. 9 is a perspective view of a front lens of the lamp. 10 Front combination lamp, 12 (22, 32) Lamp body, 20 Turn signal lamp, 24, 34 Bulb as light source 26, 36 Reflector, 30 Clearance lamp, 50 ... Front lens, 52 ... Light-shielding part, 54a, 54b ... Notch part which is upper and lower side edge part of ridge, 56 ... Light-shielding member, 58 ... Transparent part, 60 ... Diffusion step Eye step element, L ₂ , L ₃ … Lamp irradiation axis.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F21Q 1/00

Claims (1)

(57) [Claims] An automotive lamp in which a front lens is disposed in a front opening portion of a lamp body having a light source and a means for converting the light from the light source into parallel light, wherein the front lens is arranged so that a light emitting surface thereof is inclined upward. In the front lens, a strip-shaped light-transmitting portion formed of a horizontally extending concave portion and a strip-shaped light-shielding portion formed of a horizontally extending convex portion provided with a light-shielding material on the surface are alternately formed in the vertical direction. At least in a region corresponding to the light-transmitting portion of the back surface, an optical axis parallel to the illumination axis of the lamp, and a convex lens element that is a diffusion step element that diffuses emitted light in the up, down, left, and right directions is made continuous in the lateral direction. An automobile in which a convex lens element array is formed, and upper and lower side edges of a convex ridge forming a light shielding portion are cut out in a direction in which light emitted from the light transmitting portion is diffused in a vertical direction. Lighting fixtures.