JP3333272B2 - Method for manufacturing watch cover glass - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a cover glass for a timepiece which retains its function as a hard sapphire glass having high strength and is hardly scratched, and has an improved appearance as a partial decoration. It is.

[0002]

2. Description of the Related Art In recent years, sapphire glass, which has high strength and is not easily scratched, has been increasingly used as a cover glass for a watch due to a desire for high-quality watches. Conventionally, in order to obtain a partially decorative portion such as a mark and a pattern on the sapphire glass, etching cannot be performed, so that it is obtained by engraving with a laser beam or a diamond grindstone.

[0003]

In the conventional method of engraving with a laser beam or a diamond grindstone, the engraved surface has a matte or rough surface, lacks sharpness, has poor appearance, and has a high value as a high-grade product. There was a problem of lowering it. The present invention solves the above-mentioned problem, and retains the function as a hard sapphire glass having high strength and scratch resistance, and has metallic luster, and is partially decorated with three-dimensional and sharp marks and patterns. It is intended to provide a method of manufacturing a watch cover glass having a portion.

[0004]

Means for Solving the Problems The method for manufacturing a cover glass for a timepiece according to the present invention includes the following steps: (a) forming a concave portion such as a mark or a pattern on one surface of an inorganic glass plate such as a blue plate glass or a white plate glass by etching; And a step of bonding a sapphire glass plate to the other surface of the inorganic glass plate with a transparent adhesive, and forming a vapor-deposited film of Au, Cr, or the like on the entire surface of the inorganic glass plate where the concave portions are formed. And a step of forming a protective mask on the surface on which the vapor-deposited film is formed, and adjusting the thickness to a desired thickness by polishing a sapphire glass plate or / and an inorganic glass plate, and forming the protective mask on the inorganic glass plate. Removing the protective mask and the deposited film other than the recesses,
Removing the protective mask in the concave portion.

(B) A step of forming a concave portion such as a mark or a pattern on an inorganic glass plate such as a blue plate glass or a white plate glass by etching, and forming Au,
A step of forming a deposited film of Cr or the like, a step of forming a protective mask on the surface on which the deposited film is formed, a step of removing the protective mask and the deposited film other than the concave portions by polishing, and Removing the protective mask;
A step of bonding the sapphire glass plate to the surface of the inorganic glass plate where the recesses are formed with a transparent adhesive, and a step of adjusting the sapphire glass plate or / and the inorganic glass plate to a desired thickness by polishing the plate; A method for manufacturing a watch cover glass, comprising:

(C) A step of forming a concave portion such as a mark or a pattern on one surface of an inorganic glass plate such as a blue plate glass or a white plate glass, and a vapor-deposited coating of Au, Cr or the like on the entire surface on which the concave portion is formed. Forming a protective mask on the surface on which the vapor-deposited film is formed, and forming a concave portion such as a mark or pattern on the other surface of the inorganic glass plate;
Forming a vapor-deposited film of Au, Cr, or the like on the entire surface of the surface on which the concave portion is formed, forming a protective mask on the surface on which the vapor-deposited film is formed, and polishing both surfaces of the inorganic glass plate. And adjusting the thickness to a desired thickness, removing the protective mask and the deposited film other than the concave portions formed on both surfaces of the inorganic glass plate, removing the protective mask remaining in the concave portions, And a step of bonding a sapphire glass plate having a desired thickness with a transparent adhesive.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a watch cover glass showing a first embodiment of the present invention. The watch glass has a structure in which a sapphire glass plate 1 and an inorganic glass plate 2 such as a blue plate glass or a white plate glass are bonded with a transparent adhesive 3. Has become. The lower surface of the inorganic glass plate 2 has a concave portion 4 for representing a mark, a pattern or the like, and a vapor-deposited film 5 of Au, Cr or the like is formed in the concave portion 4.

[0008] With the above structure, it has a function as hard sapphire glass which is high in strength and is hard to be scratched, and has a sharp mark, a pattern and the like and a metallic luster.
It gives a three-dimensional effect as if it were raised, giving a more luxurious feeling.

Next, a manufacturing process of the watch cover glass shown in FIG. 1 will be described with reference to FIGS. First, as shown in FIG. 2, a concave portion 4 representing a mark, a pattern or the like is formed on the lower surface of the inorganic glass plate 2 by etching, and then the sapphire glass plate 1 is attached to the upper surface of the inorganic glass plate 2 with a transparent adhesive as shown in FIG. Attach at 3 Next, as shown in FIG. 4, a vapor-deposited film 5 of Au, Cr, etc. is vapor-deposited on the entire surface on which the concave portion 4 is formed.
Is formed, a protective mask 6 is further formed by printing as shown in FIG. Next, as shown in FIG. 6, the total thickness was adjusted to a desired thickness by polishing the surface of the sapphire glass plate 1 and / or the surface of the inorganic glass plate 2 and formed on the surface of the inorganic glass plate 2. The deposited film 5 and the protective mask 6 are
The cover glass for the timepiece shown in FIG. 1 is obtained by removing the protective mask 6 remaining in the concave portion 4 while removing the concave portion 4 while leaving it.

During the process, the sapphire glass plate 1
The thickness of the inorganic glass plate 2 can be freely set according to the purpose, and the thickness may be set in consideration of a certain polishing amount in advance, or the polishing amount may be set with the initial thickness being constant. By changing the thickness, a desired thickness may be obtained.

FIG. 7 is a sectional view of a watch cover glass according to a second embodiment of the present invention. A sapphire glass plate 7 and an inorganic glass plate 8 such as a blue plate glass or a white plate glass are bonded with a transparent adhesive 9. Structure. The upper surface of the inorganic glass plate 8 has a concave portion 10 for representing a mark, a pattern, and the like, and a vapor-deposited film 11 of Au, Cr, or the like is formed in the concave portion 10.

[0012] With the above structure, it has a function as hard sapphire glass which is high in strength and is not easily scratched, and has a sharp mark, a pattern, and a metallic luster.
It has a three-dimensional effect as if sinking, giving a more luxurious feeling.

Next, a manufacturing process of the watch cover glass shown in FIG. 7 will be described with reference to FIGS. First, as shown in FIG. 8, a concave portion 10 representing a mark, a pattern, or the like is formed on the upper surface of the inorganic glass plate 8 by etching, and then, as shown in FIG. ,
A deposited film 11 of Cr or the like is formed, and a protective mask 12 is formed by printing as shown in FIG. Next, as shown in FIG. 11, the deposited film 11 and the protective mask 12 were removed by polishing, leaving a portion of the concave portion 10.
As shown in FIG. 2, the protection mask 12 remaining in the recess 10 is removed. Then, as shown in FIG. 13, a sapphire glass plate 7 is bonded to the surface of the inorganic glass plate 8 where the concave portions 10 are formed with a transparent adhesive 9, and finally, the inorganic glass plate 8 or /
Then, the sapphire glass plate 7 is polished to a desired thickness to obtain the watch cover glass shown in FIG.

In the above process, if the thicknesses of the sapphire glass plate 7, the transparent adhesive 9 and the inorganic glass plate 7 are set in advance so that the desired total thickness is obtained in the state shown in FIG. Polishing of both surfaces at the end becomes unnecessary, and it is possible to obtain a completed watch cover glass in the state of FIG.

FIG. 14 is a sectional view of a cover glass for a timepiece showing a third embodiment of the present invention.
And an inorganic glass plate 14 such as a blue plate glass or a white plate glass are bonded by a transparent adhesive 15, and marks and marks are formed on the upper and lower surfaces of the inorganic glass plate 14.
Concave portions 16 and 17 representing patterns and the like are formed, and the concave portions 16 and 17 are provided with vapor-deposited films 18 and 19 of Au, Cr, or the like.

With the above structure, it has a function as hard sapphire glass which has high strength and is not easily damaged.
In addition, the marks, patterns, etc. are sharp and have a metallic luster. The concave portions 17 formed on the lower surface of the inorganic glass plate 14 have a three-dimensional effect as if they were raised, and the concave portions 16 formed on the upper surface have a three-dimensional effect as if sinking. It becomes a cover glass for watches that is rich.

Next, a manufacturing process of the timepiece cover glass shown in FIG. 14 will be described with reference to FIGS. First, FIG.
As shown in FIG. 5, after a concave portion 16 representing a mark, a pattern or the like is formed on the upper surface of the inorganic glass plate 14 by etching,
As shown in FIG. 6, a deposition film 18 of Au, Cr, or the like is formed by vapor deposition on the entire surface on which the concave portion 16 is formed.
The protection mask 20 is formed by printing as shown in FIG.

Next, as shown in FIG. 18, a concave portion 17 representing a mark, a pattern, etc. is formed on the lower surface of the inorganic glass plate 14 by etching, and then, as shown in FIG. By vapor deposition film 19 of Au, Cr, etc.
Is formed, and as shown in FIG. 20, a protective mask 21 is formed by printing.

Next, as shown in FIG.
The surface of the inorganic glass plate 14 is adjusted to a desired thickness by polishing both sides of the inorganic glass plate 14.
8 and 19 and protective masks 20 and 21
, And removed as shown in FIG.
The protection masks 20 and 21 remaining on 6 and 17 are removed,
Finally, as shown in FIG. 23, a sapphire glass plate 13 having a desired thickness is adhered to the upper surface of the inorganic glass plate 14 with a transparent adhesive 15 to obtain the watch cover glass shown in FIG.

[0020]

As described in detail above, the watch cover glass made according to the present invention is made of a hard sapphire glass plate which is hard and not easily scratched, and an inorganic material such as a blue plate glass or a white plate glass excellent in etching workability. A glass plate is bonded with a transparent adhesive, and a concave portion representing a mark, a pattern, or the like is formed on the lower surface or both surfaces of the inorganic glass plate by etching, and a vapor-deposited film of Au, Cr, or the like is formed in the concave portion. As a result, the surface has the function of hard sapphire glass that is hard to be scratched, and the marks and patterns have sharp and metallic luster. , It is very luxurious and rich in variety.

According to the method of manufacturing a cover glass for a timepiece of the present invention, a sapphire glass plate, a transparent adhesive, and an inorganic glass plate having a deposited film of Au, Cr, etc. formed in a concave portion such as a mark or pattern are formed. The watch cover glass can be easily manufactured, and the marks, patterns, and the like are raised or depressed to give a three-dimensional appearance, and have a very high-grade appearance. In addition, since there is a step of polishing the surface of the sapphire glass plate and / or the inorganic glass plate during the processing process, even if there are scratches and dents on the surface of the sapphire glass plate or the inorganic glass plate, it can be removed, and the yield can be reduced. It can also be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a watch cover glass according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the manufacturing process of FIG.

FIG. 3 is a sectional view showing the manufacturing process of FIG. 1;

FIG. 4 is a sectional view showing the manufacturing process of FIG. 1;

FIG. 5 is a sectional view showing the manufacturing process of FIG. 1;

FIG. 6 is a sectional view showing the manufacturing process of FIG. 1;

FIG. 7 is a sectional view of a watch cover glass according to a second embodiment of the present invention.

FIG. 8 is a sectional view showing the manufacturing process of FIG. 7;

FIG. 9 is a sectional view showing the manufacturing process of FIG. 7;

FIG. 10 is a sectional view showing the manufacturing process of FIG. 7;

FIG. 11 is a sectional view showing the manufacturing process of FIG. 7;

FIG. 12 is a sectional view showing the manufacturing process of FIG. 7;

FIG. 13 is a sectional view showing the manufacturing process of FIG. 7;

FIG. 14 is a sectional view of a watch cover glass according to a third embodiment of the present invention.

FIG. 15 is a sectional view showing the manufacturing process of FIG. 14;

FIG. 16 is a sectional view showing the manufacturing process of FIG. 14;

FIG. 17 is a sectional view showing the manufacturing process of FIG. 14;

FIG. 18 is a sectional view showing the manufacturing process of FIG. 14;

FIG. 19 is a sectional view showing the manufacturing process of FIG. 14;

FIG. 20 is a sectional view showing the manufacturing process of FIG. 14;

FIG. 21 is a cross-sectional view showing the manufacturing process of FIG. 14;

FIG. 22 is a sectional view showing the manufacturing process of FIG. 14;

FIG. 23 is a sectional view showing the manufacturing process of FIG. 14;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sapphire glass plate 2 Inorganic glass plate 3 Transparent adhesive 4 Depression 5 Deposition coating 6 Protective mask 7 Sapphire glass plate 8 Inorganic glass plate 9 Transparent adhesive 10 Depression 11 Deposition coating 12 Protective mask 13 Sapphire glass plate 14 Inorganic glass plate 15 Transparent Adhesive 16 Depressed portion 17 Depressed portion 18 Evaporated coating 19 Evaporated coating 20 Protective mask 21 Protective mask

──────────────────────────────────────────────────続 き Continuing on the front page (72) Mitsuo Iwamura, 2666-3, Funatsu, Kawaguchiko-machi, Minamitsuru-gun, Yamanashi Prefecture Inside of Kawaguchiko Precision Co., Ltd. Jin Sakurai, Examiner in Precision Co., Ltd. (56) References JP-A-59-3384 (JP, A) JP-A-5-333164 (JP, A) JP-A-6-242260 (JP, A) -86871 (JP, U) Fully open sho 59-144492 (JP, U) Fully open sho 63-157691 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G04B 39/00 G04B 45/00

Claims (3)

(57) [Claims] 1. A step of forming a recess such as a mark or a pattern on one surface of an inorganic glass plate such as a blue plate glass or a white plate glass by etching, and applying a transparent adhesive to the other surface of the inorganic glass plate by attaching a sapphire glass plate to the other surface. And a step of bonding the entire surface of the surface of the inorganic glass plate on which the concave portions are formed with A
forming a vapor-deposited film of u, Cr, etc., forming a protective mask on the surface on which the vapor-deposited film is formed, and adjusting the thickness to a desired thickness by polishing a sapphire glass plate and / or an inorganic glass plate. A method for manufacturing a cover glass for a timepiece, comprising: a step of removing a protective mask and a vapor-deposited film other than a concave portion formed on the inorganic glass plate; and a step of removing the protective mask of the concave portion. 2. A step of forming recesses such as marks and patterns on an inorganic glass plate such as blue plate glass or white plate glass by etching, and forming Au, Cr on the entire surface of the surface where the recesses are formed.
Forming a vapor-deposited film, etc .; forming a protective mask on the surface on which the vapor-deposited film is formed; removing the protective mask and the vapor-deposited film other than the concave portion by polishing; and protecting the concave portion. Removing the mask, bonding the sapphire glass plate to the surface of the inorganic glass plate on which the recesses are formed with a transparent adhesive, and polishing the sapphire glass plate or / and / or the inorganic glass plate to a desired level. Adjusting the thickness of the watch cover glass. 3. A step of forming a concave portion such as a mark or a pattern on one surface of an inorganic glass plate such as a blue plate glass or a white plate glass, and depositing a vapor-deposited film of Au, Cr or the like on the entire surface on which the concave portion is formed. A step of forming, a step of forming a protective mask on the surface on which the vapor-deposited film is formed, a step of forming a recess such as a mark or a pattern on the other surface of the inorganic glass plate, and a surface on which the recess is formed Forming a vapor-deposited film of Au, Cr, etc. on the entire surface of the substrate, forming a protective mask on the surface on which the vapor-deposited film is formed, and adjusting the inorganic glass plate to a desired thickness by polishing both surfaces thereof. Together with a step of removing a protective mask and a deposited film other than the concave portions formed on both surfaces of the inorganic glass plate; a step of removing the protective mask remaining in the concave portions; and a sapphire glass having a desired thickness on the inorganic glass plate. A method of manufacturing a watch cover glass, comprising: bonding a plate with a transparent adhesive.