JP2953832B2 - Front glass lens for fog - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front glass lens for fog, and more particularly to an aspherical front glass lens for fog which is suitable for a vehicle lamp or the like.

[0002]

2. Description of the Related Art In a light source for a vehicle, for example, for a vehicle, a fog lamp is used in order to improve the transparency of the projected light in fog or the visibility. FIG. 6 is a cross-sectional view showing an example of the configuration of a vehicle lamp of this type.
Is mounted on the vehicle lamp body 3, yellow cap glass (usually made of hard glass) for coloring light emitted from the light source lamp 1, and 4 is emitted from the light source lamp 1 via the yellow cap glass 3. A reflecting mirror 5 for intensively projecting light forward is a front lens 5 for sealing the opening of the vehicle lamp body 2.

[0003] The yellow cap glass 3 is detachably attached to the opening end side by a cap glass 3 holding plate 6 attached to the vehicle lamp main body 2, and the cap glass 3 is colored (yellow). Is made as follows. That is, (a) Cd (cadmium) is added to and contained in the glass material constituting the cap glass 3.
(B) A thin film is formed on the cap glass 3 surface in a multilayered manner, or (c) a thin enamel film is formed on the cap glass 3 surface by applying a colored enamel using a glass powder as a binder. To be presented.

[0004]

However, the use of the cap glass 3 not only complicates the assembly and construction of the vehicular lamp but also has the following inconveniences. That is, in the case of (a), since Cd is used as a part of the raw material, there is a problem of hygiene of the worker in the manufacturing operation or the processing operation. In the case of (b), not only is the operation of forming a thin film in a multilayer manner complicated, but also the integration strength with respect to the cap glass surface is inferior, but an undesired color is exhibited due to interference between the multilayer thin films. There is a problem. Furthermore, in the case of (c), there is a problem of pollution due to the use of Cd as a coloring source, and the difference in thermal expansion coefficient from the cap glass causes
There is a problem that it is easy to peel off and is inferior in terms of life or weather resistance.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a front glass lens for fog, which has excellent life and weather resistance and can constantly reduce emitted light to yellow.

[0006]

The fog front glass lens according to the present invention is characterized in that the spherical portion of the aspherical glass lens body is formed of an ion exchange layer exhibiting yellow. The front glass lens for fog having such a configuration is formed by applying a silver salt or a copper salt, which is made into a paste using a solvent, to a spherical portion of an aspherical glass lens body containing alkali ions such as Na (sodium) ions. For example, after drying at 150 to 200 ° C.,
It can be manufactured by baking at ６００600 ° C.

[0007]

The front glass lens for fog according to the present invention has the following features.
Aspherical glass lens body spherical surface
Due to Cu (copper) ions entering the part
Light transmitted through is absorbed to provide the required yellow spectrum light
I do. For example, if silicate glass is used,
Na in glass material ⁺ Is CuSO₄Cu⁺Between
In general, the following formula⁺(Silicate glass)⁻+ CuSO₄  = Cu⁺(Silicate glass)⁻+ NaSO₄  Thereby, the surface layer of the glass material is ion-exchanged. What
This ion exchange depends on the firing temperature and firing time.
The amount of exchange between a ions and metal ions changes, and the firing temperature decreases.
Higher or increase the baking time.
The color density increases. Here, an aspherical glass lens
On the main unit, paste silver or copper
When the cloth is applied, it is relatively lower than when it is applied to a flat surface.
The desired ion exchange can be achieved by baking at a warm or relatively short time.
It can be carried out. Light is transmitted through this ion exchange layer.
At the same time, the presence of the substituted Cu ions
The absorbed light is absorbed to give a yellow spectrum light
Become.

[0008]

An embodiment will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing an example of application (use) of a front glass lens for fog according to the present invention. Reference numeral 1 denotes a light source lamp, 2 denotes a vehicle lamp main body on which the light source lamp 1 is mounted, and 4 denotes a light source. A reflector 5 'for intensively projecting the light radiated from the lamp 1 forward is a front glass lens 5' for closing the opening of the vehicle lamp body 2. The front glass lens 5 'has an ion-exchange layer that transmits or presents yellow spectrum light that moderates light emitted from the light source lamp 1. That is, the front glass lens 5 '
Is composed of an ion-exchange layer in which at least one main surface side of the glass lens body has a yellow color.

Next, an example of manufacturing such a front glass lens for fog according to the present invention will be described.

Reference Example 1 An aspherical front glass lens body for fog, for example, made of silicate glass containing a Na ion component is first prepared.
On the other hand, 400 g of copper sulfate pentahydrate, sodium thiosulfate 3
60 g, 220 g of barium sulfate, and 1000 cc of ethyl alcohol were placed in a pot mill and pulverized for 50 hours.
After mixing and drying, the mixture was dried and passed through a 100-mesh sieve, and 500 g of terpineol was added and kneaded to prepare a stain agent.

On the flat surface of the prepared aspherical front glass lens for fog, the prepared stain agent is screen-printed with 200 mesh, dried at 170 ° C. for 10 minutes, and then baked at 560 ° C. for 60 minutes. And ion exchanged. After cooling, the residue was washed away with water to obtain an aspherical front glass lens for fog having an ion exchange layer colored yellow. FIG. 2 shows the chromaticity (A-1) of the aspherical fog front glass lens obtained as described above, and FIG. 3 shows the change in the maximum transmittance under a constant temperature and humidity condition of 60 ° C. and 95% (curve). A) is shown. In FIG. 3, for comparison, in the case of an aspherical type front glass lens for fog provided with a layer colored yellow with enamel (curve B), a protective layer was provided on the layer colored yellow with enamel. A case of an aspherical type front glass lens for fog (curve C) is also shown.

Further, the chromaticity (A-2) obtained by setting the temperature of the ion exchange treatment by baking at 560 ° C. for 60 minutes to 570 ° C., and the color obtained by setting the temperature to 580 ° C. The degree (A-3) is also shown in FIG.

Example 1 In the case of Reference Example 1, 50 g of ethyl cellosolve was added to and mixed with 100 g of the stain agent, and the aspherical front glass lens body for fog was dipped and stained on the lens spherical portion. Apply and apply the agent, 17
After drying at 0 ° C. for 10 minutes, baking at 560 ° C. for 40 minutes (B-1), baking at 560 ° C. for 60 minutes (B-2), 57
Baking at 0 ° C for 40 minutes (B-3), or 580 ° C for 40 minutes
The mixture was calcined (B-4) for a minute for ion exchange. After cooling, the residue was washed away with water to obtain an aspherical front glass lens for fog having an ion exchange layer colored yellow. FIG. 4 shows the chromaticities (B-1), (B-2), (B-3), and (B) of the aspherical fog front glass lenses obtained as described above.
-4).

As a comparative example, in the above, three peripheral portions of the front glass lens body for fog were fixed with a jig, applied and coated on the entire surface by a dipping method, dried at 170 ° C. for 10 minutes, and then 560 Baking at 60 ° C for 60 minutes (C-
1), baking at 570 ° C for 20 minutes (C-2), or 58
Baking (C-3) at 0 ° C. for 20 minutes to effect ion exchange.
After cooling, the residue was washed away with water to obtain a spherical fog front glass lens having an ion exchange layer colored yellow. FIG. 5 shows the chromaticities (C-1), (C-2), and (C-3) of the spherical fog front glass lenses obtained above.
Is shown.

When an aspherical lens is used as in the first and second embodiments, it is easy to apply the stain agent only to the plane portion of the aspherical lens. However, as in the case of the first embodiment, when the coating is performed on the spherical portion of the aspherical lens, ion exchange with a desired chromaticity can be achieved by firing at a relatively low temperature or for a short time.

This is because an aspheric lens has a longer distance from the front lens as shown in Reference Example 1 since the distance from the light entering the flat surface to the light exiting the spherical surface is longer than that of the front lens shown in Reference Example 1. This is because diffusion becomes wide. That is, in the case of the aspherical lens, when the plane portion is colored, the colored light is diffused and emitted, so that light having a desired chromaticity cannot be emitted unless the coloring density is increased. On the other hand, if the spherical part of the aspherical lens is colored, it is colored at the time of emission, so that it is possible to irradiate light of the desired chromaticity by reflecting the coloring of the spherical part as it is. Becomes

[0017]

As described above, the aspherical front glass lens for fog according to the present invention does not require a cap glass when it is mounted on a vehicle lamp or the like to form a required lamp. The work can be simplified, downsized and lightened, and also greatly contributes to cost reduction. Moreover, the spherical portion is colored by ion exchange of the glass forming the spherical portion, and is integrated with the front glass lens body for fog. Maintains and exhibits weather resistance and stability (hue). Therefore, it can be said that the front glass lens for fog according to the present invention is suitable as a front glass lens for fog of a vehicle lamp used under relatively severe conditions.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an application example of a fog front glass lens according to the present invention.

FIG. 2 is a chromaticity diagram of a front glass lens for fog according to a reference example.

FIG. 3 is a curve diagram showing a comparison between weather resistance of a front glass lens for fog according to a reference example and a conventional front glass lens for fog.

FIG. 4 is a chromaticity diagram of the front glass lens for fog according to the embodiment.

FIG. 5 is a chromaticity diagram of a front glass lens for fog according to a reference example.

FIG. 6 is a cross-sectional view showing a structural example of a conventional vehicle fog lamp.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Light source lamp 2 ... Vehicle lamp main body part 3 ... Yellow cap lens 4 ... Reflection mirror 5,5 '... Entire glass lens 6 ... Cap lens pressing plate

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F21M 3/25

Claims (1)

(57) [Claims] 1. A non-spherical type front glass lens fog spherical portion of the glass lens body <br/> is characterized by being composed by the ion-exchange layer exhibiting yellow.