CN217521492U - Decorative member for timepiece and timepiece - Google Patents
Decorative member for timepiece and timepiece Download PDFInfo
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- CN217521492U CN217521492U CN202220472380.9U CN202220472380U CN217521492U CN 217521492 U CN217521492 U CN 217521492U CN 202220472380 U CN202220472380 U CN 202220472380U CN 217521492 U CN217521492 U CN 217521492U
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- timepiece
- decorative member
- base material
- hard film
- titanium
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Abstract
A decorative member for a timepiece is prevented or suppressed from being scratched, and the outline of a decoration formed by unevenness is prevented or suppressed from becoming inconspicuous. A method for manufacturing a middle link (12) is provided, wherein a decoration (G) with irregularities formed by grooves (K) extending in a scanning direction is formed on the upper surface (12a) of the middle link (12) by scanning a pulsed laser, the decoration (G) with irregularities formed by the grooves (K) is formed by scanning a base material (12e) of the middle link (12), and the base material (12e) with the irregularities is covered by a hard film (12f) of a material harder than the base material (12 e).
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 fine lines constituting grooves are arranged at narrow intervals to form irregularities on the 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.
Further, since the hard film has a higher melting point than the base material and is therefore hard to melt, the difference in level of the formed irregularities is small, and the outline of the decoration formed by the irregularities is inconspicuous.
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, and can prevent or suppress an outline of a decoration formed by unevenness from becoming inconspicuous.
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, unevenness is formed by irradiation of the laser beam to a base material of the decorative member for a timepiece, and the base material formed with the unevenness is covered with a hard film made of a material harder than the base material.
A second aspect of the present invention is a decorative member for a timepiece, having: the substrate is provided with irregularities on the surface thereof by irradiation with a pulsed laser beam, and a hard film, and the substrate on which the irregularities are formed is covered with a material harder than the substrate.
A third aspect of the present invention is a timepiece having the decoration 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, it is possible to prevent or suppress the decorative member for a timepiece from being scratched, and to prevent or suppress the outline of the decoration formed by the unevenness from becoming inconspicuous.
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 cross-sectional view showing a section along the line I-I of fig. 3 in the base material of the middle link.
Fig. 5 is a cross-sectional view corresponding to fig. 4 of the middle link in which a hard film is formed on the base material shown in fig. 4.
Description of the reference numerals
1: a watchband,
11: an outer chain link,
12: a middle chain link,
12 a: an upper surface,
K: a groove,
L: the length direction,
W: in the width direction,
G: and (6) decorating.
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 decoration G formed of a groove K is formed on an upper surface 12a which is a surface of a link 12 constituting the band 1 shown in fig. 1.
The band 1 is worn on a user of a wristwatch such that the longitudinal direction L extends 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. By repeating the connection structure of the outer links 11 and the middle links 12, the band 1 extending in the longitudinal direction L is formed.
The outer links 11 and the middle links 12 are covered with a hard film 12f 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.
Specifically, the surface of the base material 12e of stainless steel, titanium, or the like is covered with the hard film 12f in the intermediate link 12. The hard film 12f is a coating film formed of a material harder than the base material 12e (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).
As shown in fig. 2, the decoration G is configured by disposing a plurality of grooves K on the upper surface 12a of the middle link 12, and the grooves K are formed as irregularities extending along the longitudinal direction L of the band 1.
Fig. 3 is a photograph showing the groove K formed in the base material 12e of the middle link 12 before being covered with the hard film 12f by scanning 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 pulsed laser beam emitted from the laser head of the laser processing machine scans the upper surface 12a of the base material 12e of the link 12 in the longitudinal direction L, thereby extending the groove K in the scanning direction (longitudinal direction L). Specifically, since the laser light emitted in a pulse shape from the laser head intermittently irradiates the upper surface 12a of the middle link 12, the irradiated portion 12b is melted in a dot shape and sublimated as shown in fig. 3, and is recessed from the portion 12c 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 12b are arranged in series in the longitudinal direction L, and the concave portions 12b 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 b.
In this case, the base material 12e before being covered with the hard film 12f is subjected to laser processing for forming the groove K. That is, the laser beam is scanned over the base material 12e of the center link 12, and the laser beam is scanned over the surface of the base material 12e, thereby forming the grooves K having irregularities. At this time, the depressed portion 12b as the groove K is depressed by, for example, 10 μm from the portion 12c not irradiated with the laser light.
In addition, in contrast to the recessed portion 12b, a portion 12d of the edge around the recessed portion 12b is more convex than a portion 12c not irradiated with the laser light. The raised portion 12d protrudes by a height of, for example, 10 μm beyond the portion 12c that is not irradiated. Thus, the height difference H of the unevenness between the concave portion 12b and the convex portion 12d as the groove K is, for example, 20 μm.
Further, as an example of a specific condition 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 a 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.
Fig. 5 is a cross-sectional view corresponding to fig. 4 of the middle link 12 in which the hard film 12f is formed on the base material 12e shown in fig. 4. After the groove K is formed by laser processing on the base material 12e before the hard film 12f is formed in this way, as shown in fig. 5, the hard film 12f covering the entire surface including the upper surface 12a of the base material 12e is formed.
In the case of forming a hard film 12f, for example, titanium carbonitride is formed on a base material 12e 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 12e, and thereafter, irradiating an electron beam to an evaporation material (titanium) placed in a crucible to evaporate the evaporation material, 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 12f, 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 12f, a hydrocarbon gas is introduced into a chamber in which the substrate 12e 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.
The hard film 12f has a film thickness D of, for example, 0.6 to 1.0 μm, and as shown in FIG. 5, the hard film 12f is formed to have a substantially uniform film thickness D along the surface of the base material 12 e.
Therefore, even in the level difference H' of the unevenness in the middle link 12 after the formation of the hard film 12f, the level difference H of the unevenness formed by the groove K in the base material 12e is maintained as it is without being changed. That is, the height H' of the unevenness after the formation of the hard film 12f is substantially equal to the height H of the unevenness formed on the base material 12e, and the contour of the unevenness formed on the base material 12e is hardly inconspicuous even after the formation of the hard film 12 f.
Thus, the intermediate link 12 as a product after the decoration G made of the groove K is covered with the hard film 12f does not make the stereoscopic impression of the unevenness and the sharpness of the contour or the like inconspicuous due to the decoration made of the groove K on the base material 12 e.
Further, since the hard film 12f has a high melting point, in the case where the hard film 12f is laser-processed after the hard film 12f is formed on the base material 12e, the difference in height between the convex portion and the concave portion is smaller than the difference in height H' between the convex portion 12d and the concave portion 12b in the present embodiment where the base material 12e before the hard film 12f is formed is directly laser-processed.
Therefore, the level difference H' is easily secured in the middle link 12 of the present embodiment, as compared with the case where the hard film 12f is laser-processed after the hard film 12f is formed on the base material 12 e.
In addition, the height difference H' (the height difference H is also substantially the same) of the links 12 is preferably 4 μm or more from the viewpoint of obtaining sufficient visibility of the decorative groove K.
On the other hand, from the viewpoint of preventing the coating on clothes, it is preferable that the height difference H' (the height difference H is also substantially the same) of the unevenness of the center link 12 is 10 μm or less. Therefore, the height difference H' of the unevenness of the medium chain segment 12 is more preferably 4 μm or more and 10 μm or less.
In the middle link 12, since the hard film 12f covers the entire surface of the base material 12e including the irregularities formed by the grooves K, there is no portion of the base material 12e exposed to the surface, and the hard film 12f can improve the wear resistance of the portion where the decoration G is formed, and can prevent or suppress the middle link 12 from being scratched.
Further, since the middle link 12 is laser-processed with respect to the base material 12e that is softer than the hard film 12f, the power of the laser beam can be suppressed as compared with the case where the laser beam is laser-processed with respect to the hard film 12f that is harder than the base material 12 e.
For example, when stainless steel (melting point about 1500 ℃) or titanium (melting point about 1660 ℃) is used as the base material 12e, materials having relatively high hardness such as titanium nitride (melting point about 2930 ℃), titanium carbide (melting point about 3160 ℃) and titanium carbonitride (melting point about 3050 ℃) which are used as the hard film 12f have relatively high melting points.
Therefore, in the case of laser processing a material having high hardness, the power of the laser needs to be increased as compared with the case of laser processing a material having low hardness.
In addition, when DLC is used as the hard film 12f, the heat resistance is low, and the hardness is reduced at a high temperature of 300 ℃.
However, in the method for manufacturing the intermediate link 12 according to the present embodiment, since the base material 12e softer than the hard film 12f, that is, the base material 12e having a melting point lower than that of the hard film 12f is subjected to the laser processing, the power of the laser beam can be suppressed as compared with the case of performing the laser processing on the hard film 12f, and the function of protecting the base material 12e in the case of using DLC as the hard film 12f can be prevented from being lowered.
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 unevenness may be formed on the surface of the decorative member by irradiation of the pulse laser beam without scanning the laser beam, or the decoration of the dot unevenness may be formed by irradiation of the pulse 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 of a wristwatch, for example, a dial, a timepiece main body case (a dial, a pointer such as an hour hand, and a case for housing a movement).
The timepiece decoration member, which is a target to be decorated by the method of manufacturing a timepiece decoration member according to the present invention, is not limited to a wristwatch decoration member, and may be a timepiece decoration member 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, comprising:
a substrate having irregularities formed on a surface thereof by irradiation of a pulsed laser beam, an
And a hard film covering the substrate on which the irregularities are formed with a material harder than the substrate.
2. The decorative member for a timepiece according to claim 1,
the height difference of the concave and convex is more than 4 μm.
3. The decorative member for a timepiece according to claim 1,
the height difference of the concave and convex is less than 10 μm.
4. The decorative member for a timepiece according to claim 2,
the height difference of the concave and convex is less than 10 μm.
5. The decorative member for a timepiece according to any one of claims 1 to 4,
the irregularities extend in a scanning direction by scanning of the laser light.
6. The decorative member for timepiece according to any one of claims 1 to 4,
the base material is stainless steel or titanium, and the hard film is titanium nitride, titanium carbide, titanium carbonitride or diamond-like carbon.
7. The decorative member for a timepiece according to claim 5,
the base material is stainless steel or titanium, and the hard film is titanium nitride, titanium carbide, titanium carbonitride or diamond-like carbon.
8. A timepiece, characterized in that it comprises, in a case,
the decorative member for a timepiece according to any one of claims 1 to 7.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-044135 | 2021-03-17 | ||
| JP2021044135 | 2021-03-17 | ||
| JP2022-014625 | 2022-02-02 | ||
| JP2022014625A JP2022145514A (en) | 2021-03-17 | 2022-02-02 | Method of manufacturing watch decorative component, watch decorative component, and watch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217521492U true CN217521492U (en) | 2022-09-30 |
Family
ID=83368917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220472380.9U Active CN217521492U (en) | 2021-03-17 | 2022-03-04 | Decorative member for timepiece and timepiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217521492U (en) |
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2022
- 2022-03-04 CN CN202220472380.9U patent/CN217521492U/en active Active
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