JPH07280954A - Dial plate structure for timepiece - Google Patents

Abstract

PURPOSE:To provide a structure which can position and fix a coin firmly when it is used as a dial plate. CONSTITUTION:This structure has a coin 2 such as gold coin as dial plate 1 and a disc-shaped substrate 3 mounted on a module 11. The coin 2 has a shaft hole 2b for hand at the center thereof while a coin leg 2d is arranged protruding in the rear thereof. The substrate 3 has a shaft hole 3a of the hand at the center thereof while a through hole 3b for a coin leg is provided at a position coinciding with the coin leg 2d. The coin leg 2d is put into the through hole 3b for the coin leg and the coin 2 is fixed on the substrate 3 at a position where a pattern is turned in a fixed direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dial plate structure of a small timepiece such as a wristwatch, and more particularly to a coin-insert type dial plate structure.

[0002]

2. Description of the Related Art Generally, coins such as gold coins are formed in a thin metal disk shape, but coins used in the world have various patterns on their surfaces. Therefore, it is already known that a unique timepiece is created by displaying an unusual pattern of coins on a timepiece dial.

When a coin is used as a dial, the back surface of the coin is adhered and fixed to a module, for example. However, the weight of a gold coin is, for example, 2.362 for men.
Since the weight of a woman is 0.945 g and it is heavy, there is a great risk that the coin will be misaligned or dropped by simple adhesion. Therefore, it is required to firmly position and fix the coin.

Conventionally, as a timepiece using the coin, there is a prior art disclosed in, for example, Japanese Utility Model Laid-Open No. 4-96091. In this prior art, the front side sliced body obtained by slicing into two pieces at the center of the thickness of one gold coin is used as a dial, and the back side sliced body is incorporated into a watch case as a back cover, and the back side sliced body is backed. There is disclosed a technique in which a cover ring is fitted and attached to the case side, and is covered with a back cover glass to prevent scratches and dirt.

[0005]

By the way, in the above-mentioned prior art, the gold coin is sliced into two pieces and used, and the front side slice body is directly attached with the time display index. Is very complicated. Furthermore, since the sliced body is adhered with an adhesive tape or an adhesive, the sliced body may fall off although its weight is halved.

In view of the above points, an object of the present invention is to provide a dial structure which can be firmly positioned and fixed when a coin is used as a dial.

[0007]

In order to achieve this object, the present invention comprises a coin, such as a gold coin, as a dial and a thin disk-shaped substrate to be mounted on a module, the coin being centered on the axis of a needle. There is a hole and a coin foot projects from the back side, the board has a needle shaft hole in the center, and a through hole for coin feet is provided at a position that matches the coin foot. Is inserted, and the coin is fixed to the substrate at a position where the pattern of the coin faces in a predetermined direction.

In the present invention, the dial may be provided with an hour display ring around the coin on the substrate in addition to the coin and the substrate. The hour display ring may be formed integrally with the substrate or separately. When the hour display ring is formed integrally with the substrate, the coin pattern is also positioned so as to match the hour character on the entire circumference of the hour display ring. When the hour display ring is formed separately from the board, the ring foot is projected on the back surface of the hour display ring and the through hole for the ring foot is provided on the board. The hour indicator ring is positioned and fixed so that the hour marks on the entire circumference match.

[0009]

According to the present invention having the above-described structure, the coin used for the dial is positioned and firmly fixed to the board by the coin foot and the through hole for the coin foot of the board, and the dial is installed on the module. As a result, it can be prevented from falling off due to impact or the like.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view showing an embodiment of a timepiece dial structure according to the present invention, FIG. 2 is a front view of the same embodiment, and FIG. 3 is an exploded perspective view of the dial. Explaining the case where the coin is used as a dial of a wristwatch, the dial 1 is arranged around a coin 2 such as a gold coin, a substrate 3 for fixing the coin 2, and a periphery of the coin 2 as shown in FIG. A time display ring 4 for displaying time is provided.

The coin 2 has a predetermined size of a thin disk, and various patterns are engraved on both front and back surfaces. Therefore, either one of the front and back patterns is used, for example, the front pattern 2
When a is used, the back side is cut and made flat, and the shaft hole 2b of the needle is provided at the center. If you do not want to reduce the value of the coin 2, use both the front and back sides without cutting.

The substrate 3 is formed in a thin disk shape having a size that can be mounted on the surface of the module 11 (FIG. 1), and is used to position and fix the needle shaft hole 3a in the center and the module 11 on the back side. Feet (not shown) are provided respectively.
The hour display ring 4 is formed in an annular shape having an outer diameter substantially the same as the substrate 3 and a thickness substantially the same as the coin 2, and hour and minute hour characters 4a are provided on the entire circumference. The width is adjusted according to the size of the coin 2, so that the coin 2 can be fitted into the hour display ring 4.

In order to fix the coin 2 and the hour display ring 4 to the substrate 3, the back surface (cutting surface) 2c of the coin 2, for example, 2
Coin feet 2 that both position and fix at 3 or 3 points
d is fixedly projected by resistance welding, brazing or the like. On the back surface 4b of the hour display ring 4, for example, at two locations on the circumference,
A similar ring leg 4c is projected by resistance welding or brazing. On the other hand, on the substrate 3, at the position where the pattern 2a of the coin 2 and the hour character 4a on the circumference of the hour display ring 4 meet,
A coin foot through hole 3b and a ring foot through hole 3c are provided.

Therefore, at the time of assembly, an adhesive is applied to the front surface 3d of the substrate 3 and the back surface 2c of the coin 2, and the coin foot 2d is inserted into the through hole 3b for the coin foot, and both are adhered by the adhesive. , The coin foot 2d through the coin foot through hole 3
It is fixed to b by press fitting or crimping. As a result, the coin 2 is placed on the inside of the substrate 3, the central axial holes 2b and 3a of the coin foot 2d and the coin foot through hole 3b are aligned, the pattern 2a is positioned at a predetermined position, and the adhesive 5
The coin foot 2d and the coin foot through hole 3b are fixed so that the coin foot 2d and the coin foot through hole 3b do not fall off due to an impact or the like.

Similarly, the hour display ring 4 is also coated with an adhesive, and the ring foot 4c is inserted into the through hole 3c for the ring foot so that both are bonded by the adhesive and the ring foot 4
c is fixed to the through hole 3c for the ring foot by press fitting or crimping. As a result, the hour display ring 4 is provided on the outside of the coin 2 on the substrate 3, and the adhesive is provided at the position where the pattern 2a of the coin 2 and the hour character 4a on the circumference are aligned by the ring foot 4c and the ring foot through hole 3c. The ring foot 4c and the ring foot through hole 3c are fixed so that they do not fall off. In this way, the dial 1 using the coin 2 is firmly and integrally joined to the substrate 3 with the coin 2 and the hour display ring 4 at the position where the pattern 2a and the hour character 4a coincide.

Next, the case of assembling the dial 1 to a wristwatch will be described. As shown in FIGS. 1 and 2, the dial 1 is placed on the upper surface of the module 11 so that the coins 2 face up and the hour character 4a of the hour display ring 4 is set at a predetermined position.
The pointer shaft 12 of the module 11 projects through the substrate 3 and the shaft holes 2b and 3a at the center of the coin 2, and the needle 13 is attached to the shaft 12 on the upper surfaces of the coin 2 and the hour display ring 4. Next, the watch case 10 is covered, the collar 10a inside the watch case 10 is applied to the outer periphery of the hour display ring 4, and the back cover 15 is screwed to the watch case 10 and fixed to the dial and the module or case.

With such a wristwatch configuration, the dial 1
The coin 2 used for is firmly fixed to the substrate 3 and is reliably prevented from falling off due to an impact or the like. Furthermore, the time can be accurately known by the hour character 4a of the hour display ring 4 and the hand 13 arranged around the coin 2.

FIG. 4 shows another embodiment of the present invention. In this embodiment, a long coin foot 2e is fixed to the back side of the coin 2, a through hole 3d through which the coin foot 2e penetrates is formed in the substrate 3, and the module 11 is provided with a plastic mounting portion 1.
1a is provided, and a slightly tapered coin leg fixing hole 11b is formed therein. The other parts are the same as in the above embodiment.

The leg 2e fixed to the coin 2 penetrates the through hole 3d of the substrate 3 and is press-fitted and fixed in the fixing hole 11b of the module 11. Therefore, the dial and the module are integrated to facilitate the assembly.

[0020]

As described above, according to the present invention,
It is equipped with coins such as gold coins as a dial and a thin disk-shaped substrate to be mounted on a module. The coin has a coin foot protruding on the back side, and a through hole for coin feet is provided at a position matching the coin foot. Since the coins are mounted on the board so that the patterns are oriented in a predetermined direction and are integrally attached by inserting and fixing the coin feet in the through holes for the coin feet, the coins are impacted. It is surely prevented from falling off due to such reasons. Further, when the hour display ring is arranged around the coin, the time can be known accurately.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a timepiece dial structure according to the present invention.

FIG. 2 is a front view of the embodiment.

FIG. 3 is an exploded perspective view of a dial.

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

[Explanation of symbols]

 1 Dial 2 Coin 2a Pattern 2b Shaft hole 2d Coin foot 2e Coin foot 3 Substrate 3a Shaft hole 3b Coin foot through hole 3c Ring foot through hole 3d Coin foot through hole 11 Module 11a Mounting part 11b Coin foot fixing hole

Claims (4)

[Claims] 1. A coin, such as a gold coin, as a dial, and a thin disk-shaped substrate to be mounted on a module, wherein the coin has a shaft hole of a needle in the center and a coin foot is projected on the back side.
The board has a needle shaft hole in the center and a through hole for coin feet is provided at a position matching the coin foot, and the coin foot is inserted into the through hole for coin foot, so that the pattern of the coin faces in a predetermined direction. In the dial structure for timepieces, coins are fixed to the substrate. 2. A coin, such as a gold coin, as a dial, and a thin disk-shaped substrate to be mounted on the module, wherein the coin has a shaft hole of a needle in the center and a coin foot protrudes on the back side.
The board has a needle shaft hole in the center and a through hole for a coin foot is provided at a position matching the coin foot, and the coin foot is inserted so as to project from the through hole for the coin foot. A dial structure for a timepiece, wherein the coin is fixed to a module at a position where the coin is inserted into a fixing hole and the pattern of the coin is oriented in a predetermined direction. 3. The dial has a time display ring disposed on the base plate around the coin, the display ring has a ring foot protruding from the back surface, and the base plate has a ring foot through hole. The hour display ring is fixed on the substrate by inserting the ring foot into the through hole for the ring foot.
The watch dial structure described. 4. The timepiece dial structure according to claim 3, wherein the dial, the substrate, the coin, and the hour display ring are adhered by an adhesive.