JP2005310386A - Reflecting mirror of vehicular lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reflecting mirror for a vehicular lighting fixture in which any film is enabled to be formed so as to have a proper film thickness, in which the film thickness enough to carry out prescribed coloring can be set for a coloring film, and in which the film thickness enough to obtain sufficient durability can be set for a protection film by having a constitution of forming the coloring film and the protection film individually on a reflecting face when the reflecting face is made to reflect a light source light which is nearly white and to make the reflecting light carry out coloring. <P>SOLUTION: An undercoat face 3 is formed at the base material face 2 by a BMC resin or the like, an aluminum thin film is formed at this undercoat face 3 and made to be the reflecting face 4, and furthermore, the reflecting mirror 1 for the vehicular lighting fixture 10 is composed by carrying out forming of a coloring layer 5 by a coloring material, and forming a protection layer 6 for deterioration prevention on the reflection face 4, and is made to be the reflection mirror 1 for the vehicular light fixture 10. The protection layer 6 is formed on the reflecting face 4 directly by plasma polymerization, and the coloring layer 5 is formed after that, whereby the coloring layer 5 and the protection layer 6 are separated and a proper thickness is given to each. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicular lamp such as a headlight and a fog light, and more specifically, a vehicle having a structure in which a colored layer of a colorant is provided on a reflecting surface for the purpose of coloring a lamp color. This relates to the configuration of the reflector of the lamp.

  Examples of the configuration of this type of reflector for a vehicle lamp that is colored with respect to reflected light are referred to as, for example, a metal member or a BMC (bulk mold compound) resin. A resin member such as an unsaturated polyester resin and glass fiber are mixed to improve heat resistance, hardness, coefficient of thermal expansion, etc. to the same level as a metal member. A basic shape of a reflecting surface such as a surface is formed.

  And in order to further improve the smoothness of the part formed for the purpose of using as a reflective surface such as the paraboloid with the above-mentioned resin, there is no description in Patent Document 1, but a liquid with high viscosity is appropriately used. A smooth surface is formed by a means such as spin coating in which a soft resin is dripped and rotated at a high speed to diffuse the entire surface of the reflecting surface to have a uniform film thickness without causing fine irregularities on the surface. The undercoat film is applied so as to be dried, and is dried and kept in a smooth state. In this way, for example, minute irregularities generated during resin molding are smoothed, and a paraboloid having a substantially perfect shape can be obtained.

  If a mirror surface is formed by vapor deposition or sputtering of aluminum on the reflection surface obtained as described above, for example, the light from the light source placed at the focal point of the paraboloid is reflected as a substantially parallel light beam. A reflecting surface can be obtained, and a lamp that can illuminate far away even with light from a relatively low power (for example, 50 W) light bulb can be obtained.

  At this time, when the above-described lamp is required to emit yellow or other colored light, the bulb glass bulb may be colored with a predetermined color. When replacing the bulb, it is necessary to obtain and replace a bulb using a glass bulb of the same color. For example, it is difficult to obtain the bulb due to various conditions such as the quality of the product lineup at the store. There is a concern that causes such problems.

Therefore, conventionally, the lens covering the reflective surface is colored, and a colored film of the same color is also formed on the surface of the reflective surface with, for example, a pigment, and the color formed when reflecting on the reflective surface. A light bulb with a desired density can be obtained by a synergistic effect with coloring when passing through a lens, and a general-purpose product using a normally available transparent bulb can be used for a light bulb. .
JP 2002-279808 A

  However, in Patent Document 1 described above, in order to prevent the mirror surface of aluminum from being deteriorated by alkali or the like, the top coat film coated relatively thinly on the surface of the mirror surface is colored to obtain a desired color light. Therefore, there is a limit to the amount of pigment or dye that can be added to a top coat film that does not have such a thickness, and it is added to obtain the required color. It is impossible.

  Therefore, as described in Patent Document 1, the lens that covers the reflecting surface is also colored, and the synergistic effect between the coloring performed when reflecting on the reflecting surface and the coloring performed when transmitting through the lens. In order to achieve a desired coloration. Therefore, the lens is inevitably colored, and for example, it is difficult to realize a design in which the entire outer lens in recent years is formed colorless and emphasizes transparency, Problems such as losing the sense of unity.

  As a specific means for solving the above-described conventional problems, the present invention provides a smooth undercoat surface by applying an undercoat to a base material surface having a basic shape formed of a BMC resin member or a metal member. An aluminum thin film is formed on the undercoat surface by vapor deposition or sputtering to form a reflective surface, and the reflective surface is colored with a coloring material for coloring reflected light. Is formed, and the reflective surface of the vehicle lamp is formed by forming a protective layer with a HMDS coating for preventing deterioration on the reflective surface, and the protective layer with the HMDS coating is formed on the reflective surface. Provided is a reflector for a vehicular lamp characterized in that a film is formed directly by plasma polymerization, and then a colored layer is formed by the colored material. Thus, the colored film can be formed with a film thickness that is free from the film thickness of the protective film, so that it is possible to color the required concentration, solve the above-described conventional problems, and improve the durability of the reflective surface. It is possible to do that.

  According to the present invention, when the light source light that is substantially white is reflected and the reflected light is colored, the colored film and the protective film are individually formed on the reflective surface. Therefore, any film can be formed with an appropriate film thickness, a sufficient film thickness can be set for a colored film, and a sufficient durability for a protective film. Therefore, it is possible to realize a lamp having a desired performance assuming that both of the purposes can be satisfied.

  In addition, by forming a protective film directly on the reflective surface and forming a colored film on the upper surface of the protective film, the colored film is damaged when the protective film is formed. As a result of not being lost due to melting, the performance is secured and the durability is improved, and the practicality of this kind of reflector is remarkably improved.

  First, in order to make the present invention, the inventor formed a first prototype 1A of the reflecting mirror 1 as shown in FIG. 1 and examined it, that is, a BMC resin member or the like, for example, a paraboloid of revolution. After the resin is applied to the part of the base material surface 2 formed as a shape and used as a reflective surface with a uniform thickness by spin coating, dried and cured to form a smooth undercoat surface 3, The reflective surface 4 was formed by vapor-depositing aluminum on the coating surface 3.

  Thereafter, a colored layer 5 is formed on the reflective surface 4 by vapor deposition or painting of the pigment, and after light from a light source (not shown) that is substantially white is reflected, the desired color light is obtained. Was made available. In addition, HMPS (hexamethyldisilazane) is formed by plasma polymerization to protect both the reflective surface 4 and the colored layer 5, and then a protective film 6 is formed. Various environmental tests were performed under the assumption that the vehicle lamp was completed as a vehicle lamp, and the durability (weather) property was examined and considered.

  As a result, in the structure of the first prototype 1A described above, a desired thickness can be formed for the colored layer 5 and the protective film 6 during the manufacturing process, and the desired color layer 5 can be formed. It is confirmed that the protective film 6 can be colored with a desired thickness, and that the protective film 6 can be formed with a desired film thickness, and the reflective surface 4 can be given a desired durability. It was.

  However, in the test assuming the completed state as the vehicular lamp 10 with respect to the reflector 1, it is found that the reflecting surface 4 is dissolved and lost in a relatively short time in the alkali resistance test. did. Secondly, it has been known that when the protective film 6 is formed, the colored layer 5 has already changed color and tends to be different from the desired color.

  As a result of various studies on the above-mentioned matters, the inventor has created a second prototype 1B of the reflecting mirror 1 as shown in FIG. As an improvement from the previous first prototype 1A, in the first prototype 1A, after forming the colored layer 5 on the reflective surface 4, the protective layer 6 is formed from the upper surface of the colored layer 5. As a result, the colored layer 5 containing an organic substance such as a binder is exposed to plasma, and as a result, the colored layer 5 is in a so-called porous state and cannot completely cover the reflecting surface 4. It became clear that it was.

  In addition, it has been found that the occurrence of discoloration in the colored layer 5 is also altered due to plasma exposure when the protective film 6 is formed in the same manner as described above. Therefore, in consideration of the above points, in the production of the second prototype 1B, a smooth undercoat surface 3 is formed on the base material surface 2 by spin coating as shown in FIG. Until the step of forming the reflecting surface 4 on the surface 3 by vapor deposition of aluminum or the like, no particular problem was found, so the layers were formed in the same order as the previous first prototype 1A.

  Here, in the previous first prototype 1A, the colored layer 5 containing an organic substance such as a binder for integrating the pigment is altered or destroyed by plasma polymerization when the protective layer 6 is formed. In this case, the protective layer 6 is formed directly on the upper surface of the reflective surface 4 which is an inorganic material. Therefore, in the second prototype 1B, the colored layer 5 is provided on the upper surface of the protective layer 6 by appropriate means such as vapor deposition or painting.

  A test is performed on the assumption that the reflecting mirror 1 of the second prototype 1B formed as described above is assembled as a vehicle lamp 10 in the same manner as the reflecting mirror 1 of the first prototype 1A. Judgment was made in comparison with the result obtained in the next prototype 1A. First of all, since the protective layer 6 is directly provided on the reflecting surface 4, adhesion is maintained without generating a porous due to organic matter between them, thereby preventing alkali from entering. Dissolution is prevented.

  Secondly, since the second prototype 1B is configured, the colored layer 5 is surely exposed to the atmosphere, but the pigment employed for coloring is highly stable. For example, even when it is used as a paint or the like, the color also changes in a normal state. For example, the color fading is not detected unless compared with a new product. Therefore, the colored layer 5 is considered to have sufficient durability even when not covered with the protective layer 6.

  As described above, according to the present invention, when the reflective surface 4 for coloring reflected light is formed, the protective layer 6 is provided in direct contact with the reflective surface 4, so that the protective layer 6 is formed by plasma polymerization. Even when it is performed, the reflecting surface 4 is brought into close contact without causing damage, so that it is possible to reliably prevent damage due to dissolution of the reflecting surface 4 due to an aluminum thin film generated in a very short period of time.

  Further, in this case, the colored layer 5 containing an organic substance is formed on the upper surface of the protective layer 6 and directly touches the atmosphere, and is not protected by the protective layer 6. According to the results of trial manufacture and examination for making the present invention by a person, the pigment itself is very stable under a normal environment and does not cause remarkable discoloration. Rather, it is more stable if it is provided on the upper surface of the protective film 6.

  FIG. 3 shows a vehicular lamp 10 that employs the reflecting mirror 1 having the configuration of the second prototype 1B completed according to the present invention, and is formed as an extremely thin film surface by vapor deposition of aluminum as described above. The reflecting surface 4 is provided with a protective layer 6 made of HMDS (hexamethyldisiloxane) in direct contact with it, so that it can guarantee a long life without being dissolved by alkali or the like. Become.

  In addition, the colored layer 5 was originally planned to be covered and protected by the protective layer 6, but in the actual trial production results, during the plasma polymerization when forming the protective layer 6 (HMDS), Since it became clear that it was exposed to plasma and became porous or caused a color change in the pigment, in the present invention, it was changed to one that forms a film on the upper surface of the protective layer 6 and used for paints, etc. The necessary and sufficient lifetime is obtained by fully exhibiting the chemical and color stability of pigments that are inherently at a high level.

  As is clear from FIG. 3, a light source 7 such as a light bulb is attached to the reflecting mirror 1, and a lens 8 made of transparent glass or resin is formed in the opening of the front surface of the reflecting mirror 1. Since the seal 9 is attached and the entry of rainwater, dust and the like is prevented, the colored layer 5 is not exposed to such a poor environment, and is extremely deteriorated. It doesn't become something that can be found.

  The present invention can be applied with a similar means, for example, when a half mirror process is performed on a window glass of an automobile or a house by vapor deposition of aluminum or the like, and a colored layer is provided on the window glass.

It is sectional drawing which shows the 1st prototype of the reflecting mirror of the vehicle lamp which concerns on this invention by the principal part. It is sectional drawing which shows the 2nd prototype of the reflective mirror of the vehicular lamp which concerns on this invention in the principal part. It is sectional drawing which shows the example of the vehicle lamp which employ | adopted the reflective mirror which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Reflective mirror 1A ... Primary prototype 1B ... Secondary prototype 2 ... Base material surface 3 ... Undercoat surface 4 ... Reflective surface 5 ... Colored layer 6 ... Protective layer 7 ... Light source 8 ... Lens 9 ... Seal 10 ... Vehicle lamps

Claims (1)

  An undercoat is formed on the base material surface on which the basic shape is formed of a BMC resin member or a metal member to form a smooth undercoat surface, and an aluminum thin film is formed on the undercoat surface by vapor deposition or sputtering. A film is formed as a reflective surface, and a colored layer is formed on the reflective surface with a coloring material for coloring reflected light, and the reflective surface is prevented from deterioration. A reflector for a vehicle lamp in which a protective layer made of a HMDS coating is formed, and the protective layer made of the HMDS coating is formed directly on the reflecting surface by plasma polymerization, and then a colored layer made of the coloring material A reflecting mirror for a vehicular lamp, characterized in that the film is formed.

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