JP4322974B2 - Vehicle lamp lens - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lens for a vehicular lamp such as a headlamp and a tail lamp, and particularly relates to a structure of a leg portion provided for joining the lens of the vehicular lamp to a housing.
[0002]
[Prior art]
FIG. 7 and FIG. 8 show the configuration of a conventional lens 90 of this kind, a vehicular lamp, as an example of a headlamp 10, and the lens 90 is a lens surface for transmitting irradiated light and adjusting light distribution characteristics. 91 and leg portions 92 provided on the periphery of the lens surface 91 for attaching the lens 90 to the housing 11. It should be noted that in recent headlamps 10, the number of light distribution characteristics formed by the reflecting mirror 12 is increased, and the lens surface 91 is substantially transparent.
[0003]
Accordingly, when the lens 90 is assembled as the headlamp 10 on the leg portion 92 as shown in FIG. 7 and attached to the vehicle, if the bumper 20 or the like is disposed close to the leg portion 92, a transparent lens is formed. Since the bumper 20 and the like are seen through the surface 91 and the user feels uncomfortable, as shown in FIG. 8, the blind X is cut in the direction of the axis X along the extending direction of the leg 92, A cylindrical cut 92a having a substantially semicircular cross-section perpendicular to the axis X is applied to the inner surface to prevent the shape of the bumper 20 and the like from being seen through the heel, thereby eliminating the above-mentioned uncomfortable feeling.
[0004]
The operation of the cylindrical cut 92a has been described in the example of the adjacent vehicle body, for example, the bumper 20. However, for example, the edge portion of the reflecting mirror 12 can be seen through the leg 92 to prevent the user from feeling uncomfortable. Since it is also effective for the internal components of the headlamp 10, it is provided over the entire circumference of the leg 92. Further, since it is effective not only for the headlamp 10 but also for the tail lamp and the like, it is provided in almost all vehicle lamps.
[0005]
[Problems to be solved by the invention]
However, the above-described cylindrical cut 92a prevents the see-through effect by diffusing a symmetric object such as the bumper 20 so that the human eye cannot focus by the convex lens action, so that the so-called out-of-focus state is symmetric. Since the shape of the object is avoided from being clearly recognized, when the distance between the cylindrical cut 92a and the symmetrical object such as the bumper 20 is close, the necessary magnification cannot be obtained and the shape is recognized fairly clearly. As a result, there is a problem that a blinding effect as expected cannot be obtained.
[0006]
[Means for Solving the Problems]
As a specific means for solving the above-described conventional problems, the present invention provides a leg portion for preventing an object close to the vehicle lamp or an object inside the vehicle lamp from being seen through and deteriorating in appearance. In the lens of the vehicular lamp that is provided with a blindfold cut as an axis along the extending direction of the leg portion, the blindfold cut is provided on the periphery of the lens for attaching the lens to the housing. The object side surface is subjected to a blindfold cut which is a prism cut whose cross section perpendicular to the axis is substantially V-shaped, and the leg side surface of the leg portion has the same pitch as the prism cut, The problem is solved by providing a lens for a vehicular lamp characterized by being provided with a cylindrical cut whose cross section perpendicular to the axis is substantially semi-cylindrical .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Below, this invention is demonstrated in detail based on embodiment shown in a figure. In addition, the same code | symbol is attached | subjected to the same part as the prior art example for easy understanding, and the description is abbreviate | omitted partially about the overlapping part. 1 and 2 indicate a lens of a vehicle lamp. In this embodiment, the lens 1 of the headlamp 10 is illustrated as in the conventional example.
[0008]
At this time, the lens 1 is constituted by the lens surface 2 and the leg portion 3, and is assembled as a headlamp 10 and attached to the vehicle, and a symmetrical object such as a bumper 20 approaches. The bumper 20 is viewed through the lens surface 2 and the leg portion 3 and causes a sense of incongruity to the user. Therefore, the leg portion 3 requires a blindfold cut 4. This is the same as the conventional example.
[0009]
Here, in the present invention, the blind cut 4 is basically applied to both the inside and the outside of the leg 3, and the symmetrical object such as the bumper 20 of the leg 3 that does not want to be clearly shown. A prism cut 4a is applied to the surface opposite to the surface, and a cylindrical cut 4b is applied to the surface of the leg portion 3 on the line-of-sight side.
[0010]
At this time, both the prism cut 4a and the cylindrical cut 4b are provided so as to have an axis X (see FIG. 1) along the direction in which the leg portion 3 extends from the lens surface 2. As shown in FIG. 4, the prism cut 4a is substantially V-shaped in the cross section orthogonal to the axis X, and the cylindrical cut 4b is substantially semicircular in the cross section orthogonal to the axis X. The prism cut 4a and the cylindrical cut 4b have the same pitch P.
[0011]
FIG. 3 shows the operation of the present invention configured as described above. The light reflected from the bumper 20 is reversed left and right by the prism cut 4a provided on the surface of the leg 3 facing the bumper 20. The refraction in the two directions is performed, and the cylindrical cut 4b is reached in a state in which the inside of the leg portion 3 is inclined with respect to the thickness direction.
[0012]
At this time, since the light traveling toward the cylindrical cut 4b is inclined in the leg 3 by the prism cut 4a, the light that has passed through one prism cut 4a is incident on, for example, the three cylindrical cuts 4b. For example, subdivision is performed in four directions and further diffusion in multiple directions is performed, and the shape of the bumper 20 becomes more difficult to discriminate.
[0013]
Further, when the inside of the leg portion 3 is skewed as described above, when the cylindrical cut 4b is reached, light that is internally reflected by the cylindrical cut 4b and is not emitted to the outside is generated, and the transmittance as the leg portion 3 is generated. Therefore, it is felt that the brightness of reflecting the outside light of the bumper 20 is also reduced, and also in this respect, the degree of attention to the bumper 20 is reduced and no sense of incongruity is generated.
[0014]
As a result of trial manufacture and examination for achieving the present invention by the inventor, the apex angle α of the prism cut 4 a is 75 to 105 depending on the thickness of the leg 3 or the refractive index of the member forming the lens 1. Although it is more preferable to adjust within the range of 0 °, it has been confirmed that even when fixed at 90 °, the expected action and effect can be obtained regardless of the above conditions.
[0015]
FIG. 4 shows another embodiment of the present invention. In the previous embodiment, the prism cut 4a and the cylindrical cut 4b have the apex and apex, the valley and the valley facing each other on the inner and outer surfaces of the leg 3. As shown in FIG. 4, this may be provided with one apex and the other valley facing each other, that is, with a 1/2 pitch P shifted. The same effect can be obtained.
[0016]
Further, for example, when the object is an end face of the reflecting mirror 12 of the headlamp (see FIG. 1) and a sufficient distance from the leg 3 is obtained, the leg 3 as shown in FIG. If the prism cut 4a as the blind cut 4 is applied only to the side facing the symmetrical object, it becomes more difficult to recognize the shape of the symmetrical object compared to the case where the cylindrical cut of the conventional example is the blind cut. It was confirmed that it was effective.
[0017]
FIG. 6 shows still another embodiment of the present invention, and all of the previous embodiments have been described with respect to a headlamp. However, the present invention is not limited to this and the tail / stop lamp is illustrated. Any vehicle lamp having a lens 1 such as 15 can be implemented.
[0018]
In this case, an object that is extremely close to the leg portion 3 such as the outer wall 16a of the lens mounting groove that joins the lens 1 and the housing 16 is often the object, but as described above, the leg portion 3 The object can be achieved by applying the prism cut 4a to the surface on the object side and the cylindrical cut 4b on the surface on the line of sight to form the blind cut 4.
[0019]
【The invention's effect】
As described above, according to the present invention, a blindfold cut is made on the symmetrical object side surface of the leg, the prism cut having a substantially V-shaped cross section orthogonal to the axis, and on the line of sight side orthogonal to the axis. By making the lens of the vehicle lamp that is a cylindrical cut with a substantially semicircular cross section, first, the light from the object is divided in two directions by the prism cut provided on the symmetrical object side, The inside of the leg is skewed, so that light enters multiple cylindrical cuts, further enhancing the diffusion effect, for example, preventing objects such as bumpers from passing through the lens surface and seeing it clearly. As something that does not cause a sense of incongruity, it has an extremely excellent effect in improving the aesthetics of the vehicular lamp.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of a lens according to the present invention in a state assembled to a headlamp.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is an explanatory diagram showing the operation of the lens according to the present invention.
FIG. 4 is a cross-sectional view showing a main part of another embodiment of a lens according to the present invention.
5 is a cross-sectional view taken along line BB in FIG. 1. FIG.
FIG. 6 is a cross-sectional view showing a main part of still another embodiment of the lens according to the present invention.
FIG. 7 is a cross-sectional view showing a state in which a conventional lens is assembled to a headlamp.
8 is a cross-sectional view taken along the line CC of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lens 2 ... Lens surface 3 ... Leg 4 ... Blindfold cut 4a ... Prism cut 4b ... Cylindrical cut 10 ... Headlamp 11, 16 ... Housing 12 ... Reflector 15 ... Tail / Stop lamp α ... Prism cut apex angle P ... Blindfold cut pitch X ... Axis

Claims (2)

In order to prevent the object close to the vehicle lamp or the object inside the vehicle lamp from being seen through and deteriorating the appearance, the leg is subjected to a blind cut as an axis along the extending direction of the leg. In the vehicular lamp lens according to the present invention, the blindfold cut has a substantially V-shaped cross section perpendicular to the axis on the object side surface of the leg portion provided at the periphery of the lens for attaching the lens to the housing. A blind cut that is a prism cut that is a letter shape is applied, and a cylindrical cut that has the same pitch as the prism cut and has a substantially semi-cylindrical cross section perpendicular to the axis is applied to the surface of the leg on the line of sight the lens of the vehicle lamp, characterized in that are.   The lens for a vehicle lamp according to claim 1 or 2, wherein the prism cut and the cylindrical cut are made in a state shifted by 1/2 pitch.

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