JPH07191154A - Luminous structure of timepiece - Google Patents

Abstract

PURPOSE:To make design of dial board of variety and reduce the number of manhours in applying luminous paint by irradiating the dial board with the luminous paint in the circumferential part of the dial. CONSTITUTION:A luminous paint 3 using aluminium strontium oxide as its luminous base is applied onto a dial ring 6 or the dial ring 6 is made of mixture made of synthetic resin pellet and luminous paint.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure using a luminescent coating on a dial plate peripheral portion in a watch exterior.

[0002]

2. Description of the Related Art The conventional method of using a luminescent coating for a watch is to apply the luminescent coating on the time scale of a dial and to coat it on a hand as shown in Japanese Utility Model Showa 57-26080. As the paint, there were a self-luminous luminescent paint made of promethium which is a radioactive substance, and a luminescent luminous paint using zinc sulfide as a luminescent substrate.

[0003]

However, in the above-mentioned prior art, since the color of the luminous paint is limited, there is a limit in achieving a variety of designs when it is used for the dial and the needle. Further, since it is necessary to apply the luminous paint to both the letter abbreviations and both the hour hand and the minute hand, there is a problem that it takes a lot of processing steps. Zinc sulfide, which is a luminous phosphorescent paint, has a short afterglow time of about 1 hour to emit light and has low brightness.
There was not enough light to illuminate the surrounding area. Afterglow time is 1
Calcium strontium sulfide, which is 0 to 20 hours,
Due to its chemical nature, it absorbs moisture in the air and decomposes, and when it emits an odorous hydrogen sulfide gas, it gradually loses its light-emitting property, and it has poor durability and low brightness.

Therefore, the present invention solves such a problem, and an object thereof is to provide a timepiece structure in which a luminous paint having high brightness and good durability is used in the peripheral portion of the dial.

[0005]

In order to solve the above-mentioned problems, the present invention is characterized in that a luminous phosphor coating having aluminum strontium oxide as a light-emitting base is formed on the periphery of the dial to illuminate the dial.

[0006]

【Example】

(Embodiment 1) FIG. 1 shows a case in which a luminescent coating 3 is applied to the surface of a dial ring 6 of a watch case 1 made of metal or synthetic resin.

Here, 2 is glass, 4 is a needle, and 5 is a dial. Luminescent paint 3 is a phosphorescent luminous paint composed of strontium aluminum oxide as a light-emitting substrate and mixed with polymethylmethacrylate as a binder material. Compared with conventional luminescent paint, afterglow time is 8 hours or more, it does not contain radioactive substances, and it shines almost all night, and its initial brightness is about 10 times higher. Is as wide as 200 to 450 nm, and the longer the irradiation light is, the better the light is. Furthermore, since it is composed of ceramics whose main raw material is high-purity alumina, it has high chemical stability and excellent light resistance, weather resistance, and humidity resistance, so it can be used outdoors.

Further, if the luminous substrate of the luminous paint is a ceramic obtained by sintering aluminum as a main raw material, the same effect can be obtained by using a compound of calcium, barium or a rare earth element other than strontium, and the luminous color is also a component. Depending on the color tone, the design variation can be expanded. In addition, the binder polymethylmethacrylate is generally a thermosetting resin that is dried at high temperature.However, thermosetting resin is used for clear coating to improve the durability of the luminous paint. The thinner is less solventy and the surface will be distorted, so UV curable UV
Using a resin as a binder is also useful for improving the appearance.

If the dial ring as shown in FIG. 1 is used, light is stored in the daytime luminescent paint 3 without using a luminescent member for the dial, abbreviation, and the needle itself, and the initial brightness is about 10 compared with the conventional one.
Since the hands and dial are illuminated by the doubled luminous intensity, it is possible to read the time at night without attaching night light to the dial and hands themselves.

As described above, it is very effective in improving the visibility in the dark without spoiling the appearance of the dial.
Further, if the dial itself is coated with high reflectance, the brightness can be further increased and the visibility of the dial can be further improved. Furthermore, since it is not used for dials, needles, and abbreviations themselves, there are no design constraints as before, and since it is not necessary to use it in any number of places, the number of processing steps can be reduced.

(Embodiment 2) In FIG. 2, the dial ring 6 is made of synthetic resin, and is formed by mixing the pellets of the synthetic resin material and the above-mentioned luminous paint when molding. As a result, the dial ring 6 itself contains the luminous paint, and the dial and the needle are irradiated with the accumulated light to obtain the same effect as that of the first embodiment.

(Embodiment 3) FIGS. 3 and 4 show a watch case 1.
The luminous coating 3 is applied to the facing surface of the above.
Even if the dial ring is not used, the same effect as that of the first embodiment can be obtained by using this structure. Figure 4
In this structure, since the luminescent member 3 cannot be seen from the outer surface, the external appearance is not spoiled and the dial can be well illuminated. Further, the same effect as that of the second embodiment can be obtained by mixing and molding the case where the case is made of synthetic resin with the luminous paint.

(Embodiment 4) FIG. 5 shows a case where the above-mentioned luminous paint 3 is applied to the inner surface of the glass of a timepiece. As a result, the printing on the inner surface of the glass has a shining design, and the design variation can be increased by changing the color of the luminescent paint. In addition, the luminous paint 3 illuminates the dial and the needle at night by phosphorescence, and the same effect as above can be obtained.

(Embodiment 5) As shown in FIG. 6, by printing 7 between the luminous paint 3 and the glass 2 and providing one layer,
The luminous paint 3 cannot be seen from the outside. In addition, by changing the printing color, it is possible to increase the design variation, and by illuminating the hands, the dial and the dial at night, the same effect as described above can be obtained.

(Embodiment 6) FIG. 7 shows a case in which the luminous paint 3 is applied to the back side of the needle. By using it in this way, the luminous paint cannot be seen in the daytime, but when it becomes dark, the luminous paint applied to the hour and minute hands illuminates the dial and the time can be read. In this structure, since the needle itself emits light, the periphery of the needle is particularly illuminated, and the position of the needle can be easily known, so it is easier to read the time compared to other methods.
Moreover, since the luminous paint is applied only to the needle, the amount of the luminous paint used can be small.

[0016]

As described above, according to the present invention, the luminous phosphorescent paint using aluminum strontium oxide as a light emitting substrate has high brightness, long afterglow time, and excellent light resistance, weather resistance and moisture resistance. Because it is excellent in use, by using it around the display part of the dial, even if the dial, which does not use the luminous paint on the hands, abbreviations, etc., does not impair the appearance, it can greatly improve visibility in the dark. effective. In addition, if the dial itself is painted with high reflectance, the brightness can be further increased, the visibility of the dial can be further improved, and it can be used at any number of places such as the hour hand, minute hand, and abbreviation. Since there is no need to do so, it has the effect of reducing the processing man-hours.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the invention.

FIG. 2 is a sectional view showing a second embodiment of the invention.

FIG. 3 is a sectional view showing a third embodiment of the invention.

FIG. 4 is a sectional view showing a third embodiment of the invention.

FIG. 5 is a sectional view showing a fourth embodiment of the invention.

FIG. 6 is a sectional view showing a fifth embodiment of the invention.

FIG. 7 is a sectional view showing Embodiment 6 of the invention.

[Explanation of symbols]

 1 ... Watch case 2 ... Glass 3 ... Luminous paint 4 ... Needle 5 ... Dial 6 ... Dial ring 7 ... Printing

Claims (5)

[Claims] 1. A luminescent structure for a watch exterior, characterized in that a luminous phosphor coating containing aluminum strontium oxide as a light emitting base is applied to the dial ring surface of the watch case. 2. A luminescent structure for a watch exterior, wherein the dial ring of the watch case itself is mixed with a luminescent phosphorescent material containing aluminum strontium oxide as a light emitting base. 3. A luminescent structure for a timepiece exterior, characterized in that a phosphorescent luminescent coating containing aluminum strontium oxide as a light-emitting substrate is applied to the facing surface of the watch case. 4. A luminescent structure for a watch exterior, characterized in that a luminous phosphor coating containing aluminum strontium oxide as a light emitting base is applied to the inner surface of the glass of the watch case. 5. A luminescent structure for a watch exterior, characterized in that a phosphorescent luminescent coating containing aluminum strontium oxide as a light-emitting substrate is applied to the back surface of the hour hand and minute hand of the watch.