CN217404731U - Decorative member for timepiece and timepiece - Google Patents
Decorative member for timepiece and timepiece Download PDFInfo
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- CN217404731U CN217404731U CN202220475726.0U CN202220475726U CN217404731U CN 217404731 U CN217404731 U CN 217404731U CN 202220475726 U CN202220475726 U CN 202220475726U CN 217404731 U CN217404731 U CN 217404731U
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- timepiece
- decorative member
- hard film
- base material
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Abstract
A decorative member for a timepiece and a timepiece are provided, which prevent or suppress the decorative member for a timepiece from being scratched. A method for manufacturing a middle chain link (12) is provided, wherein a decoration (G) with irregularities formed by grooves (K) extending in the scanning direction is formed on the upper surface of the middle chain link (12) by scanning a pulsed laser, the surface (12b) of the base material (12a) of the middle chain link (12) is covered with a hard film (12c) of a material harder than the base material (12a), and then, when the irregularities are formed by irradiating the hard film (12c) with the laser, the base material (12a) is not exposed even at the recessed portions (12d) of the irregularities.
Description
Technical Field
The utility model relates to a decorative component and clock and watch for clock and watch.
Background
For example, a decorative member such as a band or a dial of a wristwatch is decorated. As an example of decoration, there is a case where a plurality of thin lines to be grooves are arranged at narrow intervals to form irregularities on a surface and a pattern is formed by reflection of light.
Among them, for example, it is proposed to form the above-described unevenness by processing using a laser (laser processing). Specifically, a laser beam is irradiated onto the surface of the decorative member to melt and sublimate the irradiated surface, and the laser beam is scanned to form grooves extending in the scanning direction, thereby forming the uneven shape on the surface of the decorative member.
That is, the portion scanned by the laser beam is recessed in a groove shape, and the portion where no groove is formed is projected to be opposed to the recessed groove, so that the structure is formed in a concavo-convex shape. Since the edge portion of the groove is more convex than the non-groove portion, the edge portion of the protrusion may be regarded as a convex/concave shape.
Here, a hard film (hard coating) such as titanium nitride, titanium carbide, or Diamond-Like Carbon (DLC) is formed on the surface of the decorative member. By forming the hard film, the surface of the decorative member can be prevented or suppressed from being scratched.
In the case where a hard film is formed on the surface of the decorative member in this manner, laser processing is performed after the hard film is formed (see, for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 5-287499
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
However, when the hard film is laser-processed, the hard film disappears in the portion scanned with the laser beam, and a base material (for example, stainless steel or titanium) of the decorative member, which is a material softer than the hard film, is exposed, and the exposed portion has a problem that the wear resistance is low and the decorative member is easily scratched.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of manufacturing a decorative member for a timepiece, and a timepiece, which can prevent or suppress a decorative member (decorative member for a timepiece) used in a timepiece from being scratched.
Means for solving the problems
A first aspect of the present invention is a method for manufacturing a decorative member for a timepiece, wherein a decoration made of unevenness is formed on a surface of the decorative member for a timepiece by irradiation of a pulse-shaped laser beam, the surface of the base material of the decorative member for a timepiece is covered with a hard film made of a material harder than the base material, and then, when the laser beam is irradiated to the hard film to form unevenness, the base material is not exposed even in the concave portion of the unevenness.
A second aspect of the present invention is a decorative member for a timepiece, comprising a hard film formed by covering a surface of a base material with a material harder than the base material, wherein uneven decoration is formed on the hard film by irradiation of a pulsed laser beam, and the base material is not exposed even in the uneven recessed portion.
A third aspect of the present invention is a timepiece having the decorative member for a timepiece of the present invention.
Effect of the utility model
According to the method for manufacturing a decorative member for a timepiece, the decorative member for a timepiece, and the timepiece of the present invention, the decorative member for a timepiece can be prevented or suppressed from being scratched.
Drawings
Fig. 1 is a perspective view showing a band of the wristwatch.
Fig. 2 is a schematic view showing a state in which a decoration formed of a groove is formed on the upper surface which is the surface of the links constituting the band shown in fig. 1.
Fig. 3 is a photograph showing details of the groove.
Fig. 4 is a sectional view showing a section along the line I-I of fig. 3 in the middle link.
Description of the reference numerals
1: a watchband,
12: a middle chain link,
12 a: a base material,
12 b: a surface,
12 c: a hard film,
12 d: a recessed portion (recess),
12 e: a convex part,
12 f: part of,
D0, D1, D2: film thickness,
G: decoration, and,
K: a groove,
L: the length direction,
W: the width direction.
Detailed Description
Hereinafter, a method of manufacturing a decorative member for a timepiece, and an embodiment of a timepiece according to the present invention will be described with reference to the drawings.
Fig. 1 is a perspective view showing a band 1 of a wristwatch, and fig. 2 is a schematic view showing a state in which a garnish G including a groove K is formed on an upper surface which is a surface of a link 12 constituting the band 1 shown in fig. 1.
The band 1 shown in the figure is worn on a user of a wristwatch so that the longitudinal direction L is along the circumferential direction of the wrist of the user. The band 1 includes outer links 11 and middle links 12, the outer links 11 are disposed at both ends in a width direction W perpendicular to a longitudinal direction L, and the middle links 12 are disposed between both ends of the outer links 11.
The outer link 11 has links 11a and 11b at both ends in the width direction W. These two links 11a and 11b are joined to a rod-shaped member, not shown, extending in the width direction W, respectively, to form an integral outer link 11.
The middle link 12 is disposed at a position offset in the longitudinal direction L with respect to the outer links 11, and is connected so as to straddle two outer links 11, 11 adjacent in the longitudinal direction. The band 1 extending in the longitudinal direction L is formed by repeating the structure of connecting the outer links 11 and the middle links 12.
The outer links 11 and the middle links 12 are covered with a hard film 12c on a base material of a metal such as stainless steel. The base material of the outer links 11 and the middle links 12 is not limited to stainless steel, but may be other metals such as titanium. The base material of the outer links 11 and the middle links 12 may not be a metal such as stainless steel or titanium, but may be a material other than a metal, for example, a resin. Furthermore, the outer links 11 and the middle links 12 may be different base materials.
The middle link 12 is an example of a decorative member for a timepiece, which is a target to be decorated by the method for manufacturing a decorative member for a timepiece of the present invention, and is also an example of a decorative member for a timepiece of the present invention. The timepiece having this middle link 12 is an example of the timepiece of the present invention.
As shown in fig. 4, in detail, the midlink 12 has a hard film 12c on a surface 12b of a base material 12a made of stainless steel, titanium, or the like, and the entire surface 12b is covered with the hard film 12 c. The hard film 12c is a coating film formed of a material harder than the base material 12a (hardness of about 200HV), such as titanium carbide (hardness of 3000 to 4000HV), titanium nitride (hardness of 1900 to 2400HV), titanium carbonitride (hardness of 2600 to 3200HV), or DLC (diamond-like carbon; hardness of 3000 to 5000 HV).
The hard film 12c is formed to have a film thickness D0 of 1.0 μm, for example. The thickness D0 is 1.5 times or more thicker than the thickness of the hard film covering the middle link 12, which is generally 0.6 μm. In consideration of productivity, by forming the hard film 12c to have a thickness of about 1.0 μm to 2.0 μm, the base material 12a (see fig. 4) can be prevented from being exposed even in the concave portion of the unevenness when the unevenness is formed by laser irradiation.
For example, when titanium carbonitride is formed as the hard film 12c, the hard film 12c of titanium carbonitride is formed on the base material 12a by introducing argon gas at a flow rate of about 190cc/min, nitrogen gas at a flow rate of about 100cc/min, and methane gas at a flow rate of about 50cc/min into a chamber of a vacuum apparatus, applying a cathode voltage of 10V to the base material 12a, thereafter irradiating an electron beam to the evaporation material (titanium) placed in a crucible to evaporate the electron beam, and performing ion plating for about 30 minutes while maintaining a vacuum degree of about 0.2 Pa. When titanium nitride is formed as the hard film 12c, only nitrogen gas is introduced, and when titanium carbide is formed, only methane gas is introduced.
When DLC (diamond-like carbon) is formed as the hard film 12c, a hydrocarbon gas is introduced into a chamber in which the substrate 12a is disposed, for example, and the film is formed by a plasma CVD method. DLC can also be formed by ion deposition, sputtering using a solid carbon target, arc method, or the like.
As shown in fig. 2, the decorative member G is formed by arranging a plurality of grooves K in the hard film 12c, the grooves K being formed as irregularities extending in the longitudinal direction L of the band 1.
Fig. 3 is a photograph showing the groove K formed by scanning the middle link 12 covered with the hard film 12c with the pulsed laser light along the longitudinal direction L, and fig. 4 is a cross-sectional view showing a cross section along the line I-I in fig. 3.
The pulse-shaped laser beam emitted from the laser head of the laser processing machine scans the hard film 12c of the link 12 in the longitudinal direction L, thereby extending the groove K in the scanning direction (longitudinal direction L). Specifically, since the hard film 12c of the middle link 12 is intermittently irradiated with the laser light emitted in a pulse form from the laser head, the irradiated portion melts into a dot form and sublimates as shown in fig. 3, and becomes a dot-form recessed portion 12D (recessed portion) having a film thickness D1 thinner than the film thickness D0 of the portion 12f not irradiated with the laser light as shown in fig. 4.
In the laser processing machine, the laser head is scanned in the longitudinal direction L, whereby the dot-shaped concave portions 12d are arranged in series in the longitudinal direction L, and the concave portions 12d as a whole form a groove K extending in the longitudinal direction L. In the present embodiment, scanning is performed at a speed of about 1/4 times the diameter of each of the dot-shaped concave portions 12 d.
In the concave portion 12d, the base material 12a is not exposed. This is because the film thickness D0 of the hard film 12c is thicker than the film thickness of a general hard film, and therefore, even if the processing conditions of laser processing for forming the groove K in a general hard film are directly applied, the laser does not reach the base material 12a, and the concave portion 12D is covered with the hard film 12c (D1 > 0 μm).
On the other hand, the portion 12f not irradiated with the laser is relatively protruded with respect to the recessed portion 12d, and formed as a concave-convex. The portion that becomes the edge of the outline of the recessed portion 12D is configured as a convex portion 12e that is convex more than the portion 12f that is not irradiated with the laser, and the film thickness D2 of the convex portion 12e is thicker than the film thickness D0(═ 1.0 μm) of the portion 12f that is not irradiated with the laser. Therefore, it can be considered that the concave and convex portions 12d and 12e form the concave and convex portions.
Since the hard film 12c has a high melting point, when the hard film 12c is laser-processed, the difference in height between the convex portion 12e and the concave portion 12D (D2-D1) is smaller than when the base material 12a is directly laser-processed, but from the viewpoint of obtaining sufficient visibility of the groove K formed as a decoration, it is preferable that the difference between the film thickness D2 of the convex portion 12e and the film thickness D1 of the concave portion 12D of the link 12 is 0.5 μm or more.
As an example of specific conditions for forming the groove K by laser processing, a YAG laser having a pulse period of 10 μ sec and a power of 10W was used, and the scanning speed was 2000 mm/sec. These conditions are merely examples in the present embodiment, and the groove K can be formed under conditions other than these conditions in the method for manufacturing a decorative member for a timepiece of the present invention.
According to the method for manufacturing the middle link 12 of the present embodiment, the hard film 12c remains in the manufactured middle link 12 even in the recessed portion 12d formed by the laser processing without exposing the base material 12a, and therefore, the middle link 12 can be prevented or suppressed from being scratched as compared with the case where the base material 12a is exposed.
In addition, since the unevenness formed by the intermediate link 12 in the method for manufacturing the intermediate link 12 according to the present embodiment can suppress the amount of protrusion of the convex portion 12e to be lower than the general unevenness in which the base material 12a is exposed, the feeling of catching when the unevenness is touched can be prevented or suppressed.
From the viewpoint of preventing the hanging of clothes, it is preferable that the difference in height between the convex portion 12e and the concave portion 12D of the link 12, that is, the difference in film thickness D2 of the convex portion 12e and the film thickness D1 of the concave portion 12D is 3.0 μm or less. Therefore, it is more preferable that the difference between the film thickness D2 of the convex portion 12e and the film thickness D1 of the concave portion 12D of the link 12 is 0.5 μm or more and 3.0 μm or less.
In the method for manufacturing the intermediate link 12 according to the present embodiment, the film thickness D0 of the hard film 12c is formed to be thicker than a general film thickness, so that the base material 12a is not exposed after the concave-convex processing by the laser. However, instead of increasing the thickness D0 of the hard film 12c, the conditions for forming the groove K by laser processing may be changed so that the substrate 12a is not exposed. That is, the conditions for forming the groove K by laser processing may be set lower than the normal conditions, so that the base material 12a is not exposed.
As such processing conditions, for example, the following conditions can be applied: a groove K and the like were formed using a YAG laser having a pulse period of 6 μ sec and a power of 8W at a scanning speed of 2000 mm/sec. According to the processing conditions, even if the film thickness D0 of the hard film 12c is 0.6 μm, which is a general film thickness, the substrate 12a can be prevented from being exposed in the concave portion of the unevenness when the unevenness is formed by irradiating the laser beam.
In the method of manufacturing the middle link 12 according to the present embodiment, the decoration G is formed by scanning the laser beam to form the linear groove K, but in the method of manufacturing the decorative member for a timepiece according to the present invention, the decoration having the unevenness may be formed on the surface of the decorative member by irradiation of the pulsed laser beam instead of scanning the laser beam, or the decoration having the point-like unevenness may be formed by irradiation of the pulsed laser beam.
The above embodiment is an example of the middle link 12 used for the band 1 applied to a wristwatch, and the middle link 12 is not limited to the middle link as a decorative member for a timepiece as an object to be decorated by the method for manufacturing a decorative member for a timepiece of the present invention, or as a decorative member for a timepiece of the present invention, but is not limited to the middle link as a decorative member for a timepiece as an object to be decorated by the method for manufacturing a decorative member for a timepiece of the present invention, or as a decorative member for a timepiece of the present invention.
That is, the decorative member for a timepiece, which is a target to be decorated by the method for manufacturing a decorative member for a timepiece of the present invention, or the decorative member for a timepiece of the present invention, may be an outer link other than the middle link, not only a band, but also other decorative members for a timepiece, such as a dial and a timepiece main body case (a dial, an hour hand, and a case for housing a movement).
The decorative member for a timepiece, which is a target to be decorated by the method for manufacturing a decorative member for a timepiece of the present invention, is not limited to the decorative member for a wristwatch, and may be a decorative member for a timepiece other than a wristwatch.
The decorative member for a timepiece of the present invention may be a member constituting a part of a finished product, or may be a finished product. The timepiece of the present invention is not limited to a wristwatch, and may be a table clock, a wall clock, a decorative clock, or other timepieces.
Claims (8)
1. A decorative member for a timepiece, characterized in that,
the surface of the base material has a hard film formed by covering the surface with a material harder than the base material,
the hard film is formed with a concave-convex decoration by irradiation of a pulse laser beam,
the substrate is not exposed even in the concave portion of the unevenness.
2. The decorative member for a timepiece according to claim 1,
the thickness of the hard film is 1.0 [ mu ] m or more and 2.0 [ mu ] m or less.
3. The decorative member for a timepiece according to claim 1,
the height difference of the concave and convex is more than 0.5 μm.
4. The decorative member for a timepiece according to claim 2,
the height difference of the concave and convex is more than 0.5 μm.
5. The decorative member for a timepiece according to any one of claims 1 to 4,
the height difference of the concave and convex is less than 3.0 μm.
6. The decorative member for timepiece according to any one of claims 1 to 4,
the irregularities extend in a scanning direction by scanning of the laser light.
7. The decorative member for a timepiece according to claim 5,
the irregularities extend in a scanning direction by scanning of the laser light.
8. A timepiece, characterized in that it comprises, in a case,
the decorative member for a timepiece described in any one of claims 1 to 7.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-044134 | 2021-03-17 | ||
| JP2021044134 | 2021-03-17 | ||
| JP2022-014624 | 2022-02-02 | ||
| JP2022014624A JP2022145513A (en) | 2021-03-17 | 2022-02-02 | Method of manufacturing watch decorative component, watch decorative component, and watch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217404731U true CN217404731U (en) | 2022-09-09 |
Family
ID=83138747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220475726.0U Active CN217404731U (en) | 2021-03-17 | 2022-03-04 | Decorative member for timepiece and timepiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217404731U (en) |
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2022
- 2022-03-04 CN CN202220475726.0U patent/CN217404731U/en active Active
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