阅读说明：本技术 钟表用表盘、钟表 (Timepiece dial and timepiece ) 是由 星野一宪 小林昇吾 由永爱 小山稔生 九野利幸 于 2021-06-29 设计创作，主要内容包括：提供钟表用表盘、钟表,装饰性、设计性高。钟表用表盘具有：基材(3)；突起部(71),其通过激光加工形成在所述基材(3)上；以及覆盖层(64),其设置在所述突起部(71)的周围,所述突起部(71)的上表面的至少一部分从所述覆盖层(64)露出。(Provided are a timepiece dial and a timepiece, which have high decorativeness and design. The timepiece dial has: a substrate (3); a protrusion (71) formed on the base material (3) by laser processing; and a covering layer (64) provided around the protrusion (71), wherein at least a part of the upper surface of the protrusion (71) is exposed from the covering layer (64).)

1. A timepiece dial includes:

a substrate;

a protrusion portion formed on the base material by laser processing; and

a cover layer disposed around the protrusion,

at least a portion of an upper surface of the protrusion is exposed from the cover layer.

2. The dial for a timepiece according to claim 1, wherein,

the protrusion protrudes from the bottom of the base material,

a first plating layer is disposed on the bottom.

3. The dial for a timepiece according to claim 2, wherein,

a second plating layer different from the first plating layer is provided on an upper surface of the protrusion.

4. The dial for a timepiece according to claim 3, wherein,

the second plating layer protrudes beyond the cover layer.

5. The timepiece dial according to any one of claims 1 to 4, wherein,

the cover layer has light transmittance.

6. The dial for a timepiece according to claim 3, wherein,

the protrusion is set as a first protrusion,

the timepiece dial has a second projecting portion different from the first projecting portion,

the first protrusion is the same height as the second protrusion.

7. The dial for a timepiece according to claim 3, wherein,

the protrusion is set as a first protrusion,

the timepiece dial has a second projecting portion different from the first projecting portion,

the first protrusion is different in height from the second protrusion.

8. The dial for a timepiece according to claim 7, wherein,

the second protruding portion is lower in height than the first protruding portion, and is covered with the cover layer.

9. The dial for a timepiece according to claim 6, wherein,

a third plating layer different from the first plating layer and the second plating layer is provided on an upper surface of the second projection.

10. The dial for a timepiece according to any one of claims 6 to 9, wherein,

the first protrusion and the second protrusion have the same size in a plan view.

11. The dial for a timepiece according to any one of claims 6 to 9, wherein,

the first protrusion and the second protrusion have different sizes in a plan view.

12. The dial for a timepiece according to claim 11, wherein,

the timepiece dial further has a third projecting portion,

the third protrusion is different in size from the first protrusion and the second protrusion.

13. The dial for a timepiece according to claim 12, wherein,

a distance between the first protrusion and the second protrusion is different from a distance between the second protrusion and the third protrusion.

14. The dial for a timepiece according to claim 12, wherein,

the third protrusion has a height different from the heights of the first and second protrusions.

15. A timepiece having the timepiece dial according to any one of claims 1 to 14.

Technical Field

The present invention relates to a timepiece dial and a timepiece having the dial.

Background

Conventionally, a dial that is an external appearance of a wristwatch has been studied for improving decorativeness and design. For example, patent document 1 discloses a technique for improving the decorative effect by forming various irregularities on the surface of a dial.

According to patent document 1, the dial has a structure in which an adhesive resin layer, a metal thin film, and a transparent plate are laminated on a base substrate, and the metal thin film is coated on the surface of the adhesive resin layer following the uneven surface formed thereon. In the uneven surface of the adhesive resin layer, before the resin layer is cured, a flat plate is placed on the resin layer and uniformly pressed, and then the flat plate is lifted upward, so that the surface of the resin layer is pulled by the flat plate, thereby forming a plurality of uneven patterns. In addition, the transparent plate arranged on the metal film enlarges the stereoscopic impression of the concave-convex patterns.

Patent document 1: japanese patent laid-open publication No. 2000-155181

However, the dial of patent document 1 has a problem that it is difficult to produce a desired uneven pattern. Specifically, in the conventional method depending on the viscosity of the adhesive resin layer, the material of the flat plate, the pulling speed, and the like, the formed uneven pattern has no regularity, and it is difficult to quantitatively control the position, number, size, shape, and height of the unevenness. In other words, a timepiece dial having a decorative and high design is required.

Disclosure of Invention

The timepiece dial of the present application includes: a substrate; a protrusion portion formed on the base material by laser processing; and a cover layer provided around the protrusion, at least a part of an upper surface of the protrusion being exposed from the cover layer.

The timepiece of the present application has the timepiece dial described above.

Drawings

Fig. 1 is a plan view of a timepiece according to embodiment 1.

Fig. 2 is a flowchart showing a flow of the dial plate manufacturing method.

Fig. 3 is a top view of a substrate.

Fig. 4 is an enlarged view of the indicia.

Fig. 5 is a view showing a manufacturing process of the dial.

Fig. 6 is a view showing a dial manufacturing process.

Fig. 7 is an enlarged photograph of the scale.

Fig. 8 is a sectional view of a different embodiment of the protrusion according to embodiment 2.

Fig. 9 is a sectional view of a different embodiment of the protrusion according to embodiment 3.

Description of the reference symbols

3: a substrate; 4: a reference hole; 7: marking; 8: a logo; 10: a timepiece; 11: a dial plate; 15: a date window; 21: a second hand; 22: needle separation; 23: a hour hand; 30: a main body; 50: a crown; 52: calibration; 55: a third plating layer; 58: a bottom; 61: a first convex portion; 62: a second convex portion; 63: a first plating layer; 64: a cover layer; 65: a second plating layer; 68: a cover layer; 69: a convex portion; 71: a protrusion portion; 72: a protrusion portion; 72 b: a protrusion portion; 73: a protrusion portion; 74: a protrusion portion; 75: a protrusion portion; 81: a line segment; 82-86: and (6) line segments.

Detailed Description

Embodiment mode 1

Summary of the timepiece

Fig. 1 is a plan view of the timepiece of the present embodiment.

The timepiece 10 of the present embodiment is a 3-hand analog wristwatch, and has a calendar function.

The timepiece 10 includes a main body 30, a dial 11, a second hand 21, a minute hand 22, an hour hand 23, a crown 50, and the like.

The main body 30 is a case and is made of hard metal such as stainless steel or titanium. A movement (not shown) for driving the hands is housed on the back surface of the dial 11 of the main body 30.

A logo (logo)8, a mark 7, a date window 15, a scale 52, and the like are provided on the dial 11. A through hole (not shown) through which the shaft of the hand passes is formed in the center of the circular dial 11, and a second hand 21, a minute hand 22, and an hour hand 23 are attached.

Logo 8 is the brand, logo of timepiece 10. As an example, the mark 7 is a starry sky mark that patterns the arrangement of stars of a hunter base. The present invention is not limited to a hunter base, and may be a star of other constellation, season, birth date, memorial day, a mark or symbol other than a star. For example, it may be a mark that mimics a line, building, landscape, character, object, geographical feature, etc. The date window 15 is a window frame for displaying a date. Scale 52 is a time scale.

Since the dial 11 is manufactured by a manufacturing method described later, the base has a rich texture, and the emblem 8 and the mark 7 have a high decorative effect. The details will be described later.

The crown 50 is a crown, and is provided to enable correction of the date if pulled for one time and correction of the time if pulled for two times. In addition, other functions may be provided.

Method for manufacturing dial plate

Fig. 2 is a flowchart showing a flow of the dial plate manufacturing method. Fig. 3 is a top view of a substrate. Fig. 4 is an enlarged view of the indicia. Fig. 5 and 6 are views showing a dial manufacturing process. Here, a method of manufacturing the dial 11 will be described mainly with reference to fig. 2, with reference to fig. 1 to 6 as appropriate.

In step S1, the substrate 3 is prepared. The base 3 shown in fig. 3 is a metal substrate serving as a base of the dial 11. In the initial state, as shown in fig. 3, the base 3 has a substantially square shape, and the center thereof is a formation area of the circular dial 11. In a preferred embodiment, a brass plate having a square shape of about 40mm square and a thickness of about 0.3mm is used as the substrate 3. The diameter of the dial 11 is about 33 mm. The material of the substrate 3 is not limited to this material, and any metal may be used as long as it is, and for example, zinc white copper, a noble metal such as gold, silver, or platinum, copper, or stainless steel may be used. Alternatively, an alloy thereof may be used. The thickness of the base material and the diameter of the dial 11 are not limited to the above.

As shown in fig. 3, 2 reference holes 4 are provided on the diagonal line of the base material 3. In the manufacturing process, the base material 3 is set on a jig provided with reference pins corresponding to the reference holes 4 in units of 10 to 20 pieces, and is processed in each process in a positioned state. In the manufacturing process, the substrate 3 may be processed so as to flow one by one.

In step S2, the area of the dial 11 of the substrate 3 is laser-processed. In a preferred example, the laser processing uses a laser irradiation device capable of femtosecond ultrashort pulse irradiation. The laser irradiation conditions are preferably changed between the case of forming a deep engraved shape such as a projection and the case of surface finishing including a shallow engraved pattern. As the irradiation conditions, there are parameters such as an output frequency, a scanning speed, a laser output, and a scanning path pitch.

In the following description, the processing of the mark 7 in the dial 11 of fig. 1 is exemplified as a representative example, but the same processing is also performed on the logo 8, the date window 15, and the scale 52 of the dial 11. Fig. 4 is an enlarged view of the mark 7, and the a-B section is a section of the protrusion 72 and the protrusion 71. Fig. 5 is a process diagram 42 showing a mode of forming the first and second convex portions 61 and 62 by laser processing. Further, the process diagram 42 is a sectional view of the section a-B of fig. 4.

The first convex portion 61 and the second convex portion 62 as shown in process fig. 42 are formed by irradiating the peripheral region of the solid surface of the base material 3 shown in process fig. 41 of fig. 5 with laser light, the peripheral region being the portion to be the first convex portion 61 and the second convex portion 62.

In a preferred embodiment, the heights of the first and second projections 61, 62 are the same, and are about 50 μm. In other words, the periphery is excavated until the height of the first and second convex portions 61 and 62 becomes about 50 μm. The reference surface of the substrate 3 is set as a bottom 58. Thereby, the first and second convex portions 61 and 62 protrude from the bottom portion 58 of the base 3. The height here means a distance between the bottom 58 and the upper surface of the protrusion. The height of the protrusion is not limited to about 50 μm, and may be set as appropriate according to design.

The first convex portion 61 and the second convex portion 62 are different in size in plan view, and the first convex portion 61 is one turn larger. In other words, the first convex portion 61 and the second convex portion 62 have different widths when viewed in cross section. The planar shapes of the first projection 61 and the second projection 62 are both circular. The first convex portion 61 is a portion that becomes the first protrusion 71 in the mark 7 in fig. 4. Similarly, the second convex portion 62 is a portion serving as a second protrusion portion 72.

In the above, the description has been given of the representative example of the laser processing example in which the portions of the mark 7 corresponding to the protrusions 71 and 72 are used, but the laser processing is performed over the entire area of the dial 11. In detail, the dial 11 of fig. 1 can be laser-processed to form the logo 8, the date window 15, the scale 52, the base pattern, and the like according to the design used. The base pattern here refers to a pattern or design applied to the bottom portion 58 formed by laser processing the base material 3.

In step S3, the first plating process is performed on the base material 3 on which the first convex portions 61 and the second convex portions 62 are formed. Specifically, as shown in process fig. 43 of fig. 5, the first plating layer 63 is formed on the entire surface of the base material 3. Thereby, the first plating layer 63 is formed over the upper surfaces and side surfaces of the first and second convex portions 61 and 62 and the bottom portion 58 of the base material 3. In a preferred example, the plating process is performed by electrolytic plating, and nickel plating is performed to a predetermined thickness. The gold plating of the nickel base may be performed, and not limited to nickel plating, but may be chromium plating, silver plating, copper plating, tin plating, or the like. By providing the first plating layer 63, the color tone of the base material 3 can be hidden. The upper surface here refers to a surface normal to the direction in which the dial 11 is viewed, of the surfaces of the first convex portion 61, the second convex portion 62, or the convex portions 71, 72.

In step S4, the covering layer 64 is formed on the first plating layer 63. In a preferred embodiment, the cover layer 64 is formed by spraying a dark blue acrylic resin onto the base material 3. As a result, as shown in process diagram 44 of fig. 6, a deep blue cover layer 64 is formed on the entire surface of the base material 3. The color tone of the cover layer 64 is not limited to this color tone, and may be colored or transparent depending on the design. Alternatively, clear coating may be performed on the colored substrate. The cover layer 64 is not limited to acrylic, and may be made of any resin material, for example, cellulose resin, urethane resin, acrylic paint resin, or the like. The forming method is not limited to the spray coating, and for example, a spin coating method, an ink jet method, a dispenser (dispenser) method, pad printing (gravure printing), screen printing, or the like may be used.

In step S5, the coating layer 64 and the first plating layer 63 covering the upper surfaces of the first and second convex portions 61, 62 are removed by a polishing step, and the upper surfaces of the first and second convex portions 61, 62 are exposed from the coating layer 64. In a preferred embodiment, the upper surfaces of the first convex portion 61 and the second convex portion 62 are mirror-finished by performing a primary polishing with a polishing pad and then performing a secondary polishing with a polishing pad. By adopting such a configuration, expression using the contrast between the color tone and texture of the base material 3 and the color tone and texture of the cover layer 64 can be performed. In a preferred embodiment, as shown in process fig. 45 of fig. 6, the coating layer 64 and the first plating layer 63 are polished to expose the upper surfaces of the first and second convex portions 61 and 62, but the first plating layer 63 may partially remain on the upper surfaces of the first and second convex portions 61 and 62. In other words, at least a portion of the upper surface is exposed from the covering layer 64. In this manner, more abundant expression using the base material 3, the coating layer 64, and the first plating layer 63 can be performed.

In step S6, the second plating process is performed on the upper surfaces of the first and second convex portions 61 and 62 exposed from the covering layer 64. Specifically, as shown in process diagram 46 of fig. 6, the second plating layer 65 is formed on the upper surfaces of the first and second convex portions 61 and 62. In a preferred example, the plating process is performed by electrolytic plating, and gold plating is performed to a predetermined thickness. The gold plating is not limited to gold plating, and any metal may be used, and noble metals such as silver, platinum, and rhodium are particularly preferable. Thereby, the protrusions 71 and 72 having the second plating layer 65 on the top are formed. As shown in process fig. 46, a covering layer 64 serving as a base is formed around the projections 71 and 72. In other words, the protrusions 71 and 72 protruding from the base cover layer 64 are three-dimensionally raised.

Returning to fig. 1.

Similar to the projections 71 and 72, the other projections of the mark 7, the logo 8, the date window 15, and the scale 52 are also processed in the same manner. Then, a circular dial 11 is cut out from the base material 3 to obtain the dial 11 shown in fig. 1.

As described above, the base of the dial 11 is formed with the deep blue cover layer 64 reminiscent of a night sky. Here, a starry sky dial 11 is completed, which symbolizes that the gold symbols 7 imitating the hunter base are arranged in a floating manner.

Returning to fig. 4.

In the mark 7, when the protrusion 75 is the third protrusion, the size of the protrusion 75 is different from the protrusions 71 and 72 in a plan view. Specifically, the size is increased in the order of the protrusion 75, the protrusion 72, and the protrusion 71. The height of the projection 75 is the same as that of the projections 71 and 72. Further, the distance between the projection 71 and the projection 72 is different from the distance between the projection 72 and the projection 75. Specifically, the distance between the protrusion 72 and the protrusion 75 is shorter than the distance between the protrusion 71 and the protrusion 72. Thus, by intentionally forming an irregular pattern, strong and weak expression can be performed.

On the other hand, the projections 73, 74, and 75 are all arranged at substantially equal intervals and have substantially the same size. By forming the pattern in a regular pattern in this manner, a uniform pattern can be produced. As described above, according to the processing method of the present embodiment, a regular pattern and an irregular pattern can be intentionally formed, and thus a desired design and appearance can be formed.

Example of actual protrusion

Fig. 7 is an enlarged photograph of the scale.

Fig. 7 is a scale 52 located in the 4-point direction on the dial 11 of fig. 1, and is an enlarged photograph of the scale 52 formed by the above-described manufacturing method of the present application.

As shown in fig. 7, scale 52 produced by the production method of the present application is highly stereoscopic and has a metallic feeling of metallic luster. This is because, as described above, the second plating layer 65 is formed on the top of the scale 52 rising from the cover layer 64 of the substrate.

On the other hand, as a method for forming a scale or a logo, printing and implanting of a time stamp (japanese: abbreviated character) are known. For example, when the scale is formed by pad printing, it is difficult to generate a three-dimensional appearance and a metallic appearance as in the scale 52 of fig. 7. In addition, in the case where the scale is formed using a rod-shaped timing member as another member, the texture can be the same as the scale 52 of fig. 7, but the number of steps for implantation is required in addition to the increase of the members. Further, there is room for improvement in yield and quality, such as the overflow of the adhesive during the implantation. In addition, when the time stamp is fixed by the pins, the thickness of the time stamp is limited by the thickness of the pins, and it is difficult to form a long and thin time stamp.

As described above, according to the present embodiment, the following effects can be obtained.

The timepiece dial 11 manufactured by the above-described manufacturing method includes: a substrate 3; a protrusion 71 formed on the base 3 by laser processing; and a cover layer 64 provided around the protrusion portion 71, at least a part of the upper surface of the protrusion portion 71 being exposed from the cover layer 64.

Thus, the position, number, size, shape and height of the protrusions can be quantitatively controlled by laser processing. Therefore, a desired uneven pattern can be produced. Further, desired expression can be performed by using the difference in material, hue, chroma, and lightness between the cover layer 64 and the protrusion.

Therefore, the timepiece dial 11 can be provided with a decorative and highly designable appearance.

In general, surface pressing, etching, and cutting are known as methods for forming an uneven pattern such as a projection on the substrate 3, but laser processing is preferred to any method for manufacturing the dial 11. Specifically, in the case of surface pressing, since a stamper corresponding to the design is required, it is not easy to change the design, and there is a limitation on the depth of the unevenness. In the case of etching, masking treatment according to design is required, a plurality of special facilities such as an etching solution are required, the number of steps is large, and the depth of the unevenness is limited. In addition, in the case of cutting, there is a problem that the machining time is long, and when the tool is worn, the finish is deviated.

In contrast, laser processing can form an uneven pattern of a desired depth by adjusting the irradiation intensity and time of laser light by program control according to design. In addition, design changes can be easily made only by changing the program. In addition, the main equipment required only needs to be a laser irradiation device, and the machining time is also short as compared with the cutting machining. Further, since the scale, the logo, the time mark, and the like can be formed together with the dial, the number of parts can be reduced, and the productivity can be improved. Further, since the unevenness is formed on the base material by laser processing, a pattern can be formed with a size equal to or larger than the resolution of the laser, and it is possible to perform slimming expression which has been difficult to realize in conventional time markers and the like.

The projection 71 projects from the bottom portion 58 of the base 3, and the first plating layer 63 is provided on the bottom portion 58.

Thus, since the color tone of the base material 3 can be hidden by the first plating layer 63, the lightness and chroma of the dial 11 can be adjusted by the upper cover layer 64. Further, by interposing the first plating layer 63 between the base 3 and the cover layer 64, the adhesion of the 3 can be improved. Further, as the adhesiveness is improved, environmental resistance such as moisture resistance, heat resistance, and light resistance is improved.

Further, a second plating layer 65 different from the first plating layer 63 is provided on the upper surface of the projection 71. This allows the second plating layer 65 to adjust the hue of the protrusions 71, thereby improving design.

In addition, the second plating layer 65 protrudes from the covering layer 64.

This makes it possible to stereoscopically emphasize the second plating layer 65, thereby showing visual weakness and improving design.

Further, the projection 71 as a first projection and the projection 72 as a second projection different from the projection 71 are provided, and the heights of the projection 71 and the projection 72 are the same.

Thus, a uniform pattern can be produced by using a plurality of protrusions having uniform heights. For example, scales, marks, and the like having a uniform feeling can be formed.

In addition, in a plan view, 3 of the projection portions 73, 74, and 75 are arranged with substantially the same size and substantially equal intervals.

Thus, a regular pattern can be produced by the plurality of protrusions having the same size. For example, scales, marks, and the like having a uniform feeling can be formed.

In addition, the size of the projection 71 is different from that of the projection 72 in a plan view.

Thus, various patterns can be produced by the plurality of protrusions having different sizes. In other words, the strength can be imparted to the appearance design performance.

The third protrusion portion is provided with a protrusion portion 75, and the size of the protrusion portion 75 is different from the size of the protrusion portion 71 and the size of the protrusion portion 72. This enables an irregular pattern to be intentionally formed.

Further, the distance between the projection 71 and the projection 72 is different from the distance between the projection 72 and the projection 75. Thus, by intentionally forming an irregular pattern, strong and weak expression can be performed.

The timepiece 10 of the present embodiment includes the dial 11 described above.

Therefore, the timepiece 10 having the decorative and highly designable dial 11 can be provided.

Embodiment mode 2

Different pattern-1 of protrusions

Fig. 8 is a cross-sectional view of a different embodiment of the protrusion of the present embodiment, corresponding to the process diagram 46 of fig. 6. In the above embodiment, the case where the height of the protrusion is the same was described, but the height of the protrusion may be different.

Fig. 8 is a cross-sectional view taken along line a-C of fig. 4, and taken along line 81 and projection 72. The line segments 81 to 86 are auxiliary lines connecting the protrusions.

Here, the cover layer 68 in the process of fig. 8, fig. 47, is made of a light-transmitting material. The line segment 81 as the second projection has a projection 69 as a base, which is lower in height than the second projection 62 as a base of the projection 72. In other words, in the laser processing of step S2, the convex portion 69 is formed lower than the second convex portion 62. In detail, the height of the convex portion 69 is about half the height of the second convex portion 62. In steps S3, S4, the first plating layer 63 and the covering layer 68 are formed on the convex portion 69. In the polishing step of step S5, the first plating layer 63 and the cap layer 68 remain without being polished because the height is low. That is, the line segment 81 is covered with the cover layer 68. The other line segments 82 to 86 in FIG. 4 are also the same. Except for these points, the structure is the same as that of the process diagram 46. The term "light-transmitting" as used herein means a state in which the bottom portion 58 of the base 3 under the cover layer, the second convex portion 62 embedded in the cover layer, or the protrusion 72 can be seen.

Thereby, the line segment 81 is observed through the translucent cover layer 68. Specifically, a three-dimensional line segment 81 having a metallic silver feeling due to the first plating layer 63 is observed in the translucent cover layer 68. In addition, since the protrusion 72 has the same structure as that of the process diagram 46, the contrast between the gold color on the surface of the protrusion 72 and the silver color of the line segment 81, and the height difference increase the stereoscopic effect, and thus a more colorful expression can be realized.

When it is desired to effectively use the color tone of the base material 3, the first plating layer 63 may not be formed. In this case, after the convex portions 69 and the second convex portions 62 are formed by the laser processing in step S2, the process proceeds to the coating step in step S4, and the coating layer 68 may be formed.

In the above description, the case where the height of 2 protrusions is different was described, but the height of 3 or more protrusions may be different. For example, in fig. 8, as the third projection, a base pattern may be formed by a projection having a height lower than the line segment 81 on the bottom portion 58 of the base material 3. This enables more colorful expression.

Further, the height of the projection, logo 8, date window 15, and scale 52 may be changed according to design, without being limited to the line segment 81. The base pattern is not limited to the convex portion, and may be formed by digging into the bottom portion 58 of the base material 3. In the case of the grooves, the difference in height from the protrusions is increased, and therefore, a more three-dimensional, colorful pattern can be formed.

As described above, according to the present embodiment, the following effects can be obtained in addition to the effects of the above-described embodiments.

The cover layer 68 has light transmittance.

This allows design expression in consideration of the color tone of the base material 3 or the first plating layer 63 via the light-transmitting cover layer 68.

The height of the projection 72 as the first projection is different from the height of the line segment 81 as the second projection. Thus, various patterns can be produced by the plurality of protrusions having different heights.

The line segment 81 is lower in height than the protrusion 72 and is covered with the translucent cover layer 68. This makes it possible to produce a wide variety of patterns by making the reflection of light weak at the line segment 81 covered with the cover layer 68, in addition to the difference in height.

The height of the base pattern of the convex portion as the third projection is different from the height of the projection 72 and the line segment 81. This enables a wide variety of patterns to be produced.

Embodiment 3

Different pattern of protrusions-2

Fig. 9 is a cross-sectional view of a different embodiment of the protrusion of the present embodiment, corresponding to the process diagram 46 of fig. 6. In the above embodiment, the second plating layer 65 is provided on both the top portions of the protruding portions 71 and 72, but different plating layers may be provided.

The upper surface of the protruding portion 72b in the process diagram 48 of fig. 9 is formed with a third plating layer 55 different from the second plating layer 65. In a preferred embodiment, the third plating layer 55 is a chromium plating layer. Otherwise, the same as the structure of the process diagram 46 of fig. 6.

The third plating layer 55 is formed by performing the second plating process of step S6 2 times. Specifically, first, the second convex portion 62 is selectively masked, and gold plating is performed to form the protruding portion 71. Next, the masking of the second convex portion 62 is removed, and chrome plating is performed in a state where the protruding portion 71 is selectively masked, thereby forming a protruding portion 72 b. Alternatively, the following method is also possible: after gold plating is applied to both the projection portions 71 and 72b, the gold plating of the projection portions 72b is removed by laser processing, and in a state where the projection portions 71 are selectively masked, chrome plating is applied to form the projection portions 72 b.

As described above, according to the present embodiment, the following effects can be obtained in addition to the effects of the above-described embodiments.

The third plating layer 55 different from the first plating layer 63 and the second plating layer 65 is provided on the upper surface of the projection 72b as the second projection.

This enables different colors to be formed in the projections 71 and the projections 72b, thereby further improving the design.

In the above embodiments, the dial 11 is circular, but the present invention is not limited to this. The contour of the dial 11 may also be elliptical, rectangular, barrel-shaped, or closed shapes not limited to these shapes. The closed shape is a shape having a closed contour.

In the above embodiments, the convex portion and the protruding portion are circular, but the present invention is not limited thereto. The outline of the convex portion and the protruding portion in a plan view may be an ellipse, a rectangle, a barrel, or a closed shape not limited to these shapes. The line segments 81 to 86 in embodiment 2 can be regarded as elongated rectangles, and may be shaped not only as solid lines but also as curved lines, dotted lines, or broken lines.

In the above embodiments, the process and structure for forming the mark 7 by laser processing have been described using the process diagram 42 of fig. 5 as a representative example, but when the logo 8, the date window 15, the scale 52, and the like are formed together with the mark 7 by laser processing, it is preferable to form them together in the laser processing step of step S2 of fig. 2.