JP3241503B2 - Watch jewelry pedestal and watch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watch pedestal for holding jewels such as diamonds on a second hand shaft of a wristwatch or the like.

[0002]

2. Description of the Related Art The present applicant has previously filed Japanese Patent Application No. 4-490.
No. 16 discloses a jewelry wristwatch shown in FIG. This wristwatch with a jewel has a cylindrical pedestal body 3 fitted to the top of a minute hand barrel 2 protruding from the inside of the hour hand barrel 1, a plurality of claw pieces 4 attached thereto, and a diamond gripped by the claw pieces 4. Since the pedestal main body 3 rotates together with the movement of the minute hand 6, the jewel 5 thereon also rotates, and shines from different cut surfaces of the jewel 5 due to the transition of time. ing. In addition, 7 is an hour hand, 8 is a dial, and 9 is a cover glass.

[0003]

As described above, in a wristwatch in which the jewel 5 is provided on the upper part of the minute hand barrel 2, the movement of the hands is slow, so that the dynamic glittering of the diamond 5 is insufficient.
Therefore, by fitting the pedestal body 3 onto the second hand shaft of a quartz wristwatch or the like, the glitter of the diamond 5 shifts with every second hand movement of the second hand, creating a unique taste of jewelry and the second hand even without the second hand. Instead of that, the changing glitter makes the state of hand movement visible.

However, the outer diameter of the second hand axis of a wristwatch is generally a very small diameter of about 0.2 mm, and it is better to increase the volume (carat) of the jewel in order to remarkably enhance the unique taste of the jewel. In general, it is necessary to find a way to fix a large gem on a very small diameter second hand axis. FIG.
As shown in the figure, in a structure in which a plurality of claw pieces 4 are attached to the cylindrical base body 3 by caulking, even a slight backlash between the two becomes a problem, and even when a slight gap remains, the jewel 5
The standing posture of the hand is easily collapsed, and there is a possibility that the hand movement stops. In particular, in the case of a wristwatch, acceleration is applied to the center of gravity of the jewel 5 itself due to swinging of the arm, etc. Therefore, if there is any rubbing motion (swinging motion) in the standing posture, it is amplified and the movement of the hand stops. appear. Since this type of wristwatch is a luxury watch, an inadvertent stop of the movement of the hands loses the added value of the product, so that it is necessary to ensure a posture that does not cause poor hand movement or stop the movement of the hands. On the other hand, the cylindrical base body 3
It is also conceivable to attach a plurality of claw pieces 4 to the arm by brazing. If the brazing is reliable, no slight play will occur, but in reality, a plurality of micro nail pieces 4 are brazed to the cylindrical base body 3 having an outer diameter of about 0.5 mm,
It requires a great deal of skill and is difficult to employ in terms of mass productivity.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a pedestal for holding a jewel of a watch, which can secure a standing posture of a jewel to be mounted, does not cause a poor hand operation, and is excellent in mass productivity. It is in.

[0006]

Means for Solving the Problems In order to solve the above problems, a first means taken by the present invention is to provide a plurality of claws integrally rising from a pedestal main body, and a plurality of claws formed from a bottom surface of the pedestal main body. An insert shaft part integrally protruding, a jewel gripping pedestal of a cutting watch having a shaft hole to be inserted and fitted into the second hand shaft on the clock side in the shaft part, The shaft hole is a through hole penetrating the pedestal body.
Instead of the through hole, the shaft hole may be a blind hole that defines the insertion depth of the second hand shaft.

Next, a second means taken by the present invention has a plurality of claws integrally rising from the pedestal main body, and a plug shaft integrally projecting from the bottom surface of the pedestal main body. And
A jewelry holding pedestal of a cut watch having a shaft hole to be inserted and fitted into the second hand shaft on the clock side on the shaft portion,
The bottom surface of the pedestal body is formed as a tapered surface having the shaft portion as the top. Here, it is desirable that the inner surface of the pedestal body is a tapered surface having a larger solid angle than the tapered surface.

Then, the jewelry-holding pedestal of each of the above-mentioned timepieces is used, and the jewelry is gripped and fixed by the claw portion thereof. It can be suitably realized.

[0009]

First, in the first means, since the entire pedestal is an integrally cut product, there is no problem of the backlash between the pedestal body, the claw and the shaft. The standing posture of the jewel can be stably secured. When the shaft hole formed in the shaft portion is a through hole, there is a margin for adjusting the insertion depth with respect to the second hand shaft on the clock side, so that the timepiece with a different protrusion length of the second hand shaft on the clock side is different from the timepiece. The insertion depth can be adjusted, and a general-purpose pedestal for holding jewelry can be realized. When the shaft hole is a blind hole that defines the insertion depth of the second hand shaft, the bottom surface of the blind hole serves as a stopper at the tip of the second hand shaft, so that the insertion depth can be easily controlled and contributes to the efficiency of assembly work. . Also, when applying a gilding process or the like to the pedestal for holding the jewelry of the machined product, a plating layer may adhere to the inner surface of the through-hole in the case of a through-hole and break the tolerance of the inner diameter of the through-hole. However, in the case of a blind hole, the plating solution hardly penetrates into the hole, so that the plating on the inner surface does not easily occur and the counterbore finishing can be eliminated.

In the second means, since the entire pedestal is an integrally cut product, the same effect as described above can be obtained, and of course, the bottom of the pedestal main body is formed as a tapered surface with the shaft as the top. Therefore, in the state of being inserted and fitted to the second hand shaft on the timepiece side, the escape space is secured between the minute hand and the minute hand because of the tapered surface. For this reason, even if the second hand axis and the pedestal axis are slightly asymmetric in the state of being inserted and fitted, there is no possibility that a part of the lower surface of the pedestal will contact the minute hand or the like. Further, since the material is removed by the taper processing, the weight of the pedestal is reduced, and the driving load of the second hand shaft is reduced. When the inner surface of the pedestal body is a tapered surface having a solid angle larger than the above-mentioned tapered surface, sufficient storage capacity can be ensured even for jewels with a protruding rear part, and the surface of the jewel contacts the watch-side cover glass. It is not necessary to do so, and unnecessary materials can be removed, which contributes to weight reduction. When the taper surface has a larger solid angle, the thickness of the base of the pedestal main body is thicker than that of the claw side. Therefore, even when a cutout for exposing a deep jewel is formed between the claws, the thickness of the base is almost equal to that of the boss of the wheel, so that the strength is improved.

[0011]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1A is an enlarged sectional view showing a state in which a jewel is fixed on a second hand axis of a wristwatch by a jewelry holding base of a watch according to an embodiment of the present invention, and FIG. FIG. 2A is a partially cutaway view showing a state in which the right half of a jewel gripping pedestal of the timepiece according to the present invention is cut longitudinally, FIG. 2A is a plan view of the jewelry gripping pedestal,
FIG. 2B is a front view, and FIG. 2C is a bottom view. The right side view, left side view and rear view of the jewel gripping pedestal appear the same as the front view.

The jewel gripping pedestal 10 of this timepiece is a brass cut product, and includes a pedestal main body 11 and four claws at 90 ° circumferential intervals integrally rising upward from the pedestal main body 11. It has a portion 12 and an insertion shaft portion 13 integrally projecting downward from the center of the bottom surface of the pedestal main body portion 11. The shaft portion 13 is formed with a shaft hole 13 a to be inserted and fitted into the second hand shaft 20 on the clock side, and this shaft hole 13 a is a through hole that penetrates the pedestal body 11. In addition, adjacent claw portions 1
A cutout 14 for exposing a jewel is provided deep between the two.

The pedestal 10 for holding a jewel of such a timepiece is manufactured as follows. First, the jewel accommodating space 15 is formed on one side of a cylindrical work by cutting. The inner surface of the base body portion 11 is a tapered surface S _2. Next, the center of the pedestal main body 11 is opened from the jewel housing space 15 side to form a through-hole 13a. Next, the cutout portion 14 is opened by an end mill to form the claw portion 12. Then, after processing the bottom surface of the base body portion a tapered face S _1, the shaft portion 1
3, and finally the end face of the shaft portion 13 is cut off.
The jewel gripping pedestal 10 thus formed is subjected to gold plating. However, since the plating film also adheres to the inner surface of the through hole, a counterbore processing for removing the plating film is performed to increase the accuracy of the hole diameter. In the operation of mounting the jewel 16 such as a diamond, the jewel 16 is positioned in the jewel accommodating space 15, and the tips of the four claws 12 are bent inward evenly using a caulking jig to grip the jewel 16. The jewel gripping pedestal 10 on which the jewel 16 is mounted, as shown in FIG.
Mounted on top. That is, the second hand shaft 20 is
Is fitted and fixed by inserting the shaft hole 13a of the shaft portion 13 of the jewel gripping pedestal 10 into the second hand shaft 20.

The flesh portion of the shaft portion 13 is inserted into a gap between the inner surface of the minute hand barrel 21 and the second hand shaft 20. In addition, 22 is a minute hand,
23 is an hour hand barrel, 24 is an hour hand, and 25 is a dial.

As described above, since the jewel gripping pedestal 10 is an integral part of a cut product, the pedestal main body 11 and the claw 12
The backlash between the shaft portions 13 does not cause any problem, and the mass productivity is high. The jewel 16 can be grasped without shaking, and only the gap between the insertion and fitting of the second hand shaft 20 and the shaft hole 13a becomes a problem. However, this insertion fitting requires a sufficient insertion length because the shaft hole 13a is a through hole. It can be secured, and shake such as swing motion is unlikely to occur. In addition, since there is a margin for adjusting the insertion depth with respect to the second hand shaft 20 on the clock side, the insertion depth can be adjusted with respect to a clock having a different protruding length of the second hand shaft 20 on the clock side. A pedestal for gripping can be realized. here,
The shaft hole 13a may be formed as a blind hole that defines the insertion depth of the second hand shaft 20. In such a case, the bottom surface of the blind hole serves as a stopper at the tip of the second hand shaft 20, so that the insertion depth can be easily controlled and contributes to the efficiency of the assembling work. In addition, when the pedestal for holding a jewel of a machined product is subjected to a 10-gold plating process or the like, a plating layer may adhere to the inner surface of the through-hole at the time of the through-hole, thereby breaking the tolerance of the inner diameter of the through-hole. Although processing is required, in the case of a blind hole, the plating solution hardly penetrates into the hole, so that the plating on the inner surface does not easily occur and the counterbore finish processing can be eliminated.

[0017] Since the bottom surface of the base body 11 is formed a shaft portion 13 a tapered surface S ₁ to the top, in a state fitted plug second hand shaft 20 of the watch-side, because a tapered surface S ₁ , The escape space 30 is secured between the minute hand 22 and the like. For this reason, even if the second hand shaft 20 and the axis of the pedestal are slightly asymmetric in the plugged-in state, there is no possibility that a part of the lower surface of the pedestal 11 will contact the minute hand 22 or the like. In addition, since the material is removed by the taper processing, the weight of the pedestal is reduced, and the driving load of the second hand shaft 20 is reduced.

Further, since the inner surface of the base body portion 20 is formed as a large tapered surface S ₂ of the solid angle than the tapered surface S _1, the storage volume of the accommodation space 15, even gems 16 behind portion 16a protrudes With sufficient security, the surface of the jewel does not need to contact the cover glass on the watch side, and unnecessary materials can be removed, which contributes to weight reduction. Still a large tapered surface S ₂ of the solid angle, the thickness t ₁ of the base of the pedestal body portion 11 is made thicker than it thickness t ₂ of the claw portion 12 side. Therefore, even when the excavated portion 14 for exposing the deep jewel is formed between the claw portions 12, 12, the thickening of the base portion is comparable to the boss portion of the wheel, so that the strength is improved. .

The pedestal 11 is not limited to brass, but may be a metal or alloy such as gold, silver, platinum, or aluminum. The pedestal 11 is not limited to a brilliant cut but may be a jewel such as a rose cut or a cabochon. . Furthermore, it is not limited to a cut product, and may be a pressed product, a cast product, or a molded product such as a resin, if necessary.

[0020]

As described above, the jewelry-holding pedestal of the timepiece according to the present invention has a first feature in that the pedestal body, the claw, and the shaft are integrally formed by cutting. ing. Therefore, the following effects are obtained.

Since the entire pedestal is an integrally cut product, mutual backlash between the pedestal main body, the claw, and the shaft does not pose any problem. The standing posture of the jewel can be stably secured. It is also superior in mass productivity as compared to a pedestal on which separate parts are assembled.

When the shaft hole formed in the shaft portion is a through-hole, there is a margin for adjusting the insertion depth with respect to the second hand shaft on the timepiece side, so that the timepiece having a different protruding length of the second hand axis on the timepiece side. The insertion depth can be adjusted with respect to, and a general-purpose pedestal for holding a jewel can be realized.

When the shaft hole is a blind hole that defines the insertion depth of the second hand shaft, the bottom surface of the blind hole serves as a stopper at the tip of the second hand shaft, so that the insertion depth can be easily managed and the efficiency of assembly work can be improved. Contribute to the conversion. Also, when applying a gilding process or the like to the pedestal for holding the jewelry of the machined product, a plating layer may adhere to the inner surface of the through-hole in the case of a through-hole and break the tolerance of the inner diameter of the through-hole. However, in the case of a blind hole, the plating solution hardly penetrates into the hole, so that the plating on the inner surface does not easily occur and the counterbore finishing can be eliminated.

In the case where the bottom surface of the pedestal body is formed as a tapered surface having the shaft portion as the top portion, it is a tapered surface in a state of being inserted and fitted to the second hand shaft on the clock side. An escape space will be secured between them.
For this reason, even if the second hand axis and the pedestal axis are slightly asymmetric in the state of being inserted and fitted, there is no possibility that a part of the lower surface of the pedestal will contact the minute hand or the like. Further, since the material is removed by the taper processing, the weight of the pedestal is reduced, and the driving load of the second hand shaft is reduced.

When the inner surface of the pedestal body is a tapered surface having a solid angle larger than the above-mentioned tapered surface, even if the jewel has a protruding rear portion, a storage volume can be secured, and the surface of the jewel is covered with a watch glass on the clock side. This eliminates the need for contact with the surface, and can also remove unnecessary materials, thereby contributing to weight reduction. When the taper surface has a larger solid angle, the thickness of the base of the pedestal main body is thicker than that of the claw side. Therefore, even when a cutout for exposing a deep jewel is formed between the claws, the thickness of the base is almost equal to that of the boss of the wheel, so that the strength is improved.

[Brief description of the drawings]

FIG. 1A is an enlarged sectional view showing a state in which a jewel is fixed on a second hand axis of a wristwatch by a jewelry holding base of the watch according to the embodiment of the present invention, and FIG. 1B is a watch according to the embodiment. FIG. 5 is a partially cutaway view showing a state in which a right half of a pedestal for holding a jewel is vertically cut.

2A is a plan view of the jewel gripping pedestal, FIG. 2B is a front view thereof, and FIG. 2C is a bottom view thereof.

FIG. 3 is a sectional view showing a jeweled wristwatch disclosed in Japanese Patent Application No. 4-49016.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 10: Pedestal for holding a jewel of a watch 11 ... Pedestal main body 12 ... Claw 13 ... Shaft 13a ... Shaft hole 14 ... Cutout for jewel exposure 15 ... Jewel accommodation space 16 ... Jewelry such as diamond 16a ... Back part 20 ... second hand shaft 21 ... minute hand drive barrel 22 ... minute hand 23 ... hour barrel 24 ... hour hand 25 ... dial 30 ... escaping space S ₁ ... tapered surface S ₂ ... tapered surface of the inner surface of the base body portion of the bottom surface of the base body portion. t _1, t ₂ ... pedestal body portion thickness of.

Claims (5)

(57) [Claims] 1. A plurality of claw portions integrally rising from a pedestal main body portion, and an insertion shaft portion integrally projecting from a bottom surface of the pedestal main body portion. A jewel gripping pedestal for a watch made of a cutting process having a shaft hole to be inserted and fitted therein, wherein the shaft hole is a through hole penetrating the pedestal body. Portable pedestal. 2. A plurality of claw portions integrally rising from a pedestal main body portion, and an insertion shaft portion integrally projecting from a bottom surface of the pedestal main body portion, wherein the shaft portion is connected to a second hand shaft on a clock side. A watch jewel gripping pedestal having a shaft hole to be inserted and fitted therein, wherein the shaft hole is a blind hole that defines an insertion depth of the second hand shaft. Pedestal for holding jewelry. 3. A plurality of claw portions integrally rising from the pedestal main body portion, and an insertion shaft portion integrally protruding from the bottom surface of the pedestal main body portion. A cutting jewelry holding pedestal having a shaft hole to be inserted and fitted therein, wherein a bottom surface of the pedestal body is a tapered surface having the shaft as a top. Pedestal for gripping. 4. The jewelry grip for a timepiece according to claim 3, wherein an inner surface of the base body is a tapered surface having a solid angle larger than the tapered surface. Pedestal. 5. A jewel gripping pedestal of a timepiece defined in any one of claims 1 to 4, wherein said jewel is gripped and fixed by said claw portion, and said shaft hole is inserted into said second hand shaft. A timepiece characterized by being fixed together.