JPS635126Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an automobile lamp in which an inner lens and an outer lens are arranged side by side.

In this kind of automotive lamp, the inner lens 1 is composed of Fresnel prisms 1a, and the outer lens 2 is composed of a large number of front rectangular fisheye prisms 2a, and the boundary line A between each adjacent fisheye prism is seen from the front. Generally, they are arranged in a horizontal and vertical grid, but as shown in Fig. 1, the boundary line A between adjacent fisheye prisms 2a is tilted at 45 degrees when viewed from the front. The outer lens 2 may be configured by collecting and arranging them in a diagonal grid.

In this case, the light I, B... from the light source is the inner 1
The light becomes parallel with the Fresnel prism 1a, and is condensed by the fisheye prism 2a of the outer lens 2 to obtain a constant light distribution.
As shown in the figure, the fisheye prisms 2'a and 2''a of the outer lens 2 located opposite the edge 1' of the inner lens 1 have a bright area X and a dark area Y that are triangular peaks due to their arrangement. In other words, as shown in FIG.
When the valley part 4 of the fisheye prism 2'a is arranged,
Since the parallel light fisheye that has passed through the inner lens 1 is condensed by the entire prism 2'a, the fisheye prism 2'a shines brightly and becomes a bright area X, and as shown in FIG. 3, the inner lens 1 When the peak 5 of the fisheye prism 2''a of the outer lens 2 is placed at a position facing the end side 1' of
Since the light is focused only on a part of a, the fisheye prism 2''a shines darkly and becomes a dark area Y, and the difference in brightness between the bright area X and the dark area Y becomes extreme, resulting in an unattractive image. I have to.

Therefore, in the past, a measure was taken to make the pitch of the fisheye prism 2a of the outer lens 2 finer, but a sufficient effect could not be obtained.

In view of these conventional drawbacks, the present invention creates a triangular mountain-shaped brightness by forming micro-diffusion parts such as grains and frost on the surface of the fisheye prism element of the outer lens at a position opposite to the edge of the inner lens. The objective is to eliminate dark and dark areas and create a flat boundary between light and dark, thereby providing an automobile lamp with good appearance.

An example of implementing the present invention will be described below based on the drawings.

The inner lens 1 has a Fresnel prism 1a formed on the light source side, and converts light A, B, etc. from the light source into parallel light beams and emits them to the outer lens 2.

The outer lens 2 is installed outside the inner lens 1 (on the side opposite to the light source) in parallel with the inner lens 1 at an appropriate interval, and has a large number of front rectangular fisheye prisms 2a on the inner surface side (on the inner lens side).
The prisms are assembled and arranged in a diagonal lattice shape in which the boundary line A between each adjacent fisheye prism is inclined at 45 degrees when viewed from the front. Fisheye prisms 2'a and 2''a located opposite the end side 1' of the inner lens 1
Among them, a minute diffusion portion 3 is formed on the surface of the fisheye prism 2″a where the peak portion 5 is located.

The micro-diffusing section 3 scatters the incident light, and is formed by applying texture processing or frost processing. It is formed on the surface of the eye prism 2''a. This micro-diffusion part 3 needs to be formed on the entire surface of the fisheye prisms 2'a and 2''a of the outer lens 2 in the portion facing the edge 1' of the inner lens 1. There isn't. That is, as shown in FIG. 2, the fisheye prism 2'a, in which the position of the edge 1' of the inner lens 1 and the position of the valley 4 of the fisheye prism 2'a of the outer lens 2 almost coincide, has a microscopic diffusion. When there is no need to form the portion 3 and the position of the end side 1' of the inner lens 1 overlaps the peak portion 5 of the fisheye prism 2'a as shown in FIGS. 3 and 5,
The micro-diffusing portion 3 is formed only on the surface of the fisheye prism 2'a in the portion facing the inner lens 1, and there is no need to form the micro-diffusing portion 3 in the portion not facing the inner lens 1.

In this way, the present invention has an inner lens and an outer lens arranged side by side, the inner lens is made up of a Fresnel prism, and the outer lens is made up of a large number of front rectangular fisheye prisms and the boundaries between each adjacent fisheye prism. In an automobile light fixture constructed by gathering and arranging lines in a diagonal grid shape tilted at 45 degrees when viewed from the front,
A micro-diffusion part is formed on the surface of the fisheye prism of the outer lens at a position opposite to the edge of the inner lens, so that parallel rays of light passing near the edge of the inner lens are reflected by the micro-diffusion part formed on the surface of the fisheye prism. This causes the light to be scattered by the lens to emit scattered light that is different from that diffused by a regular fisheye prism. Therefore, unlike conventional products, triangular peak-shaped bright areas and dark areas do not appear, and the boundary between the bright area X' and the dark area Y' becomes flat, resulting in a very good appearance when lit.

Moreover, since the micro-diffusion portion is simply formed on the fisheye prism surface of the outer lens at a position facing the edge of the inner lens, it is easy to manufacture and can be provided at low cost.

Therefore, the intended purpose can be achieved.

[Brief explanation of drawings]

Fig. 1 is a partial front view explaining a conventional example, Figs. 2 and 3 are sectional views taken along lines 2-2 and 3-3 in Fig. 1, and Fig. 4 shows an example of the implementation of the present invention. The partial front view shown in FIG. 5 is a sectional view taken along line 5-5 in FIG. In the figure, 1 is an inner lens, 1' is an edge, 2 is an outer lens, 2a, 2'a, 2''a are fisheye prisms, and 3 is a micro-diffusion part.

Claims (1)

[Scope of utility model registration request] The inner lens and outer lens are installed side by side,
The inner lens is composed of a Fresnel prism,
In an automobile lamp in which the outer lens is constructed by arranging a large number of front rectangular fisheye prisms in a diagonal lattice shape in which the boundaries between adjacent fisheye prisms are inclined at 45 degrees when viewed from the front, the inner lens is An automotive lamp characterized in that a minute diffusion portion is formed on the fisheye prism surface of the outer lens at a position facing the end side.