Timepiece component, timepiece, and method for manufacturing timepiece component

Abstract

To provide a timepiece component with a black pattern formed according to a slight difference in brightness.SOLUTION: A timepiece component comprises: a base material having a first region in which a plurality of first recesses is formed on a front face and a second region in which a plurality of second recesses is formed on the front face; and a multilayer film covering at least part of the first region and the second region. In a cross-sectional view of the base material cut in a thickness direction, the plurality of first recesses is regulated by a first side and a second side inclined to the first side and brought into contact with the first side at an end thereof; in the cross-sectional view, the plurality of second recesses is regulated by a third side and a fourth side inclined to the third side and brought into contact with the third side at an end thereof; in the cross-sectional view, an inclination angle of the second side to a direction orthogonal to a thickness direction of the base material is different from an inclination angle of the fourth side to the direction orthogonal to the thickness direction of the base material; and in the first region and the second region, in a planar view from the thickness direction of the base material, the value of brightness L* in L*a*b* color space is 5 or more and 20 or less.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a timepiece component, a timepiece, and a method for manufacturing a timepiece component. [Background technology]

[0002] Patent Document 1 discloses a timepiece dial in which a base material is laser processed to form protrusions and a coating is formed around the protrusions. In the timepiece dial of Patent Document 1, the protrusions are formed by laser processing, which allows the creation of an intended uneven pattern, making it possible to enhance decorativeness and design. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-11410 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, although it is possible to form an intended uneven pattern on the surface of a base material, there is a problem in that it is difficult to form a black pattern with slight differences in brightness. [Means for solving the problem]

[0005] The watch component disclosed herein comprises a substrate having a first region on the surface of which a plurality of first recesses are formed, and a second region on the surface of which a plurality of second recesses are formed, and a multilayer film covering at least a portion of the first region and the second region, wherein, in a cross-sectional view of the substrate cut in the thickness direction, the plurality of first recesses are defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end thereof, and, in the cross-sectional view, the plurality of second recesses are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end thereof, and, in the cross-sectional view, an angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate is different from an angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate, and, in a planar view seen from the thickness direction of the substrate, the first region and the second region have a lightness L* value in the L*a*b* color space of 5 or more and 20 or less.

[0006] The watch component disclosed herein comprises a substrate having a first region on the surface of which a plurality of first recesses are formed, and a second region on the surface of which a plurality of second recesses are formed, and a multilayer film covering at least a portion of the first region and the second region, wherein, in a cross-sectional view of the substrate cut in the thickness direction, the plurality of first recesses are defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end thereof, and in the cross-sectional view, the plurality of second recesses are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end thereof, and in the cross-sectional view, the angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate and the angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate are different, and the multilayer film includes three or more layers of color absorbing films made of a material containing Cr.

[0007] The timepiece of the present disclosure is characterized by including the timepiece component described above.

[0008] The manufacturing method of the disclosed watch component includes a base material having a first region on the surface of which a plurality of first recesses are formed and a second region on the surface of which a plurality of second recesses are formed, and a multilayer film covering at least a portion of the first region and the second region, the method comprising the steps of: forming the plurality of first recesses and the second recesses on the surface of the base material; and laminating the multilayer film on at least a portion of the first region and the second region of the base material on which the plurality of first recesses and the plurality of second recesses are formed, and in a cross-sectional view of the base material cut in the thickness direction, the plurality of first recesses are the first region and the second region are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the first side at an end thereof, and in the cross-sectional view, the second recesses are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end thereof, and in the cross-sectional view, an angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the base material is different from an angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the base material, and the first region and the second region have a lightness L* value of 5 or more and 20 or less in L*a*b* color space in a planar view seen from the thickness direction of the base material.

[0009] The manufacturing method of the watch component of the present disclosure is a manufacturing method of a watch component including a base material having a first region on the surface of which a plurality of first recesses are formed and a second region on the surface of which a plurality of second recesses are formed, and a multilayer film covering at least a portion of the first region and the second region, the manufacturing method including the steps of forming the plurality of first recesses and the second recesses on the surface of the base material, and laminating the multilayer film on at least a portion of the first region and the second region of the base material on which the plurality of first recesses and the plurality of second recesses are formed, and In a plan view, the multiple first recesses are defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end thereof, and in a cross-sectional view, the multiple second recesses are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end thereof, and in the cross-sectional view, an angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate is different from an angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate, and the multilayer film includes three or more layers of color absorbing films made of a material containing Cr.

[0010] The timepiece disclosed herein is characterized in that it is constructed using timepiece parts manufactured using the method for manufacturing timepiece parts described above. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a front view showing a timepiece according to a first embodiment. [Diagram 2] FIG. 2 is a front view showing an outline of the dial of the first embodiment. [Diagram 3] FIG. 3 is a cross-sectional view showing a main part of a first region of the dial of the first embodiment. [Figure 4] FIG. 4 is an enlarged cross-sectional view showing a main part of a first region of the dial of the first embodiment. [Diagram 5] FIG. 2 is a perspective view showing a main part of a first area of ​​the dial of the first embodiment. [Figure 6] FIG. 3 is a cross-sectional view showing a main part of a first region of the dial of the first embodiment. [Figure 7] FIG. 4 is an enlarged cross-sectional view showing a main part of a second region of the dial of the first embodiment. [Figure 8] FIG. 4 is a perspective view showing a main part of a second area of ​​the dial of the first embodiment. [Figure 9] 1 is a graph showing the relationship between the ratio of the length V of the oblique side in the thickness direction of the base material to the length H of the oblique side in the direction perpendicular to the thickness direction of the base material, and the lightness L*. [Figure 10] FIG. 11 is a cross-sectional view showing a main part of a first region of a dial according to a second embodiment. [Figure 11] FIG. 11 is an enlarged cross-sectional view showing a main part of a first region of a dial according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [First embodiment] A timepiece 1 according to an embodiment of the present disclosure will now be described with reference to the drawings. 1 is a front view of the timepiece 1. In this embodiment, the timepiece 1 is configured as a wristwatch that is worn on the user's wrist. As shown in Fig. 1, the timepiece 1 has a metal case 10. Inside the case 10 are a circular dial 2, a second hand 3, a minute hand 4, an hour hand 5, a crown 6, an A button 7, and a B button 8. A band 9 is attached to the case 10. Case 10 also includes case body 11 and lugs 12. Case body 11 houses therein the dial 2, second hand 3, minute hand 4, hour hand 5, etc. Lugs 12 are provided at the 6 o'clock and 12 o'clock positions of case body 11. A band 9 is attached to each lug 12 by a spring bar or the like (not shown). The dial 2 is an example of a timepiece component of the present disclosure.

[0013] FIG. 2 is a front view showing an outline of the dial 2. As shown in FIG. As shown in FIG. 2, in this embodiment, the dial 2 includes a first area 21 and a second area 22 that are visually different in color. The first region 21 and the second region 22 are visually recognized as a low-brightness black color, but in FIG. 2, the first region 21 is represented by a checkered pattern, and the second region 22 is represented by a striped pattern.

[0014] Fig. 3 is a cross-sectional view showing a main part of the first region 21, Fig. 4 is an enlarged cross-sectional view showing a main part of the first region 21, and Fig. 5 is an enlarged perspective view showing a main part of the first region 21. Figs. 3 and 4 are cross-sectional views of the base material 30 of the dial 2 cut in the thickness direction. 3 to 5, the first region 21 of the dial 2 is configured to include a substrate 30, an undercoat layer 31, a multilayer film 32, and a protective layer 33. In this embodiment, the substrate 30 is entirely covered with the undercoat layer 31, the multilayer film 32, and the protective layer 33. In other words, the undercoat layer 31, the multilayer film 32, and the protective layer 33 are laminated so as to cover the entire surface 301 of the substrate 30. The first region 21 is not limited to the above configuration, and may be formed by laminating, for example, an underlayer 31, a multilayer film 32, and a protective layer 33 so as to cover a portion of the surface 301 of the base material 30.

[0015] [Base material] The material of the base material 30 is composed of metal such as iron, brass, aluminum, etc., resin, glass, etc. When the base material 30 is composed of resin, the resin may be a non-light-transmitting resin that does not transmit light, or may be a light-transmitting resin that transmits light. In this embodiment, a plurality of first recesses 302 are formed on the surface 301 of the base material 30 in the first region 21.

[0016] [First recess] The first recess 302 is defined by a first straight side L1 and a first oblique side D1 that is inclined with respect to the first straight side L1 and abuts the first straight side L1 at an end thereof in a cross section of the substrate 30 cut in the thickness direction. The first straight side L1 is inclined so as to be symmetrical with the first oblique side D1 with respect to a symmetry axis A1 that extends in the thickness direction of the substrate 30. More specifically, in this embodiment, the first recess 302 is formed so that a plurality of cone-shaped protrusions are formed on the surface 301 as shown in FIG. The angle of the first oblique side D1 with respect to the direction perpendicular to the thickness direction of the base material 30 is set to θ1. The first straight side L1 is an example of a first side in the present disclosure, and the first oblique side D1 is an example of a second side in the present disclosure.

[0017] In this embodiment, the first recess 302 is formed so that the ratio of the length V1 of the first oblique side D1 along the thickness direction of the base material 30 to the length H1 of the first oblique side D1 along the direction perpendicular to the thickness direction of the base material 30 is greater than 1 / 6 and smaller than 1. In other words, the first recess 302 is formed so that the ratio of V1 to H1 is greater than 1:6 and smaller than 1:1. In other words, when the length V1 of the first hypotenuse D1 in the thickness direction of the base material 30 is 1, the first recess 302 is formed so that the length H1 of the first hypotenuse D1 in the direction perpendicular to the thickness direction of the base material 30 is smaller than 6 and greater than 1, that is, so that H1 is smaller than 6 times V1 and greater than 1.

[0018] [Base layer] The underlayer 31 is laminated on the surface 301 of the base material 30. In this embodiment, the underlayer 31 is formed by plating, for example, Ni or the like. In this embodiment, by laminating the underlayer 31 on the surface 301 of the base material 30, it is possible to easily laminate the multilayer film 32.

[0019] [Multilayer film] The multilayer film 32 includes a color absorbing film 321 and a color adjusting film 322 , and is laminated on the underlayer 31 . The color absorbing film 321 is formed using a metal. The metal constituting the color absorbing film 321 is preferably Ag, Pt, Au, Cu, Al, Cr, Sn, Fe, Ti, or an alloy thereof. The method for forming the color absorbing film 321 is not particularly limited, but examples thereof include ion-assisted deposition, ion plating deposition, vacuum deposition, sputtering, etc. This allows the layer structure of the multilayer film 32 to be changed as desired.

[0020] In this embodiment, the color absorbing film 321 has three layers of chromium color absorbing films 3211 made of a material containing Cr. This makes it possible to reduce the reflectance of light incident on the multilayer film 32.

[0021] The color adjustment film 322 is a film that adjusts the color tone by optical interference. In this embodiment, the color adjustment film 322 is composed of a multi-layer film including an inorganic film. Specifically, the color adjustment film 322 is composed of Ta2O5, SiO2, TiO2, Al2O3, ZrO2, Nb2O5, HfO2, Na5Al3F 14 It is preferable that the material is made of at least one of the following inorganic materials: Na3AlF6, AlF3, MgF2, CaF2, BaF2, YF3, LaF3, CeF3, and NdF3. As a result, since these inorganic materials have high chemical stability, it is possible to improve the stability and durability of the appearance of the watch components. Furthermore, it is possible to increase the range of variations in black with low lightness L* values.

[0022] Here, in this embodiment, the color adjustment film 322 has an aluminum oxide color adjustment film 3221 made of a material containing Al2O3, and a silicon dioxide color adjustment film 3222 made of a material containing SiO2. A chromium color absorbing film 3211 is laminated on the aluminum oxide color adjustment film 3221. That is, in this embodiment, the multilayer film 32 has a plurality of locations where the chromium color absorbing film 3211 made of a material containing Cr and the aluminum oxide color adjustment film 3221 made of a material containing Al2O3 are laminated. This makes it possible to further reduce the reflectance of light incident on the multilayer film 32, thereby achieving a black color with a very low lightness L* value. It should be noted that the multilayer film 32 is not limited to the above configuration, and the order of the color absorbing film 321 and the color adjusting film 322 can be set arbitrarily.

[0023] The method for forming the color adjustment film 322 is not particularly limited, but examples thereof include ion-assisted deposition, ion plating deposition, vacuum deposition, sputtering, etc. This allows the layer structure of the multilayer film 32 to be changed as desired.

[0024] [Protective layer] The protective layer 33 is a transparent layer laminated on the surface of the multilayer film 32. In this embodiment, the protective layer 33 is made of a transparent resin such as acrylic.

[0025] [Second area 22] Fig. 6 is a cross-sectional view showing a main part of the second region 22, Fig. 7 is an enlarged cross-sectional view showing a main part of the second region 22, and Fig. 8 is an enlarged perspective view showing a main part of the second region 22. Figs. 6 and 7 are cross-sectional views of the base material 30 of the dial 2 cut in the thickness direction. As shown in FIGS. 6 to 8, the second region 22 of the dial 2 is configured to include the above-mentioned substrate 30, an undercoat layer 31, a multilayer film 32, and a protective layer 33. In this embodiment, a plurality of second recesses 303 are formed on the surface 301 of the base material 30 in the second region 22.

[0026] [Second recess] The second recess 303 is defined by a second straight side L2 and a second oblique side D2 inclined with respect to the second straight side L2 and abutting the second straight side L2 at an end thereof in a cross section of the substrate 30 cut in the thickness direction. Similarly to the first recess 302 described above, the second straight side L2 is inclined so as to be symmetrical with the second oblique side D2 with respect to the symmetry axis A1 extending in the thickness direction of the substrate 30. More specifically, in this embodiment, the second recess 303 is formed so that a plurality of cone-shaped protrusions are formed on the surface 301 as shown in FIG. The angle of the second oblique side D2 with respect to the direction perpendicular to the thickness direction of the base material 30 is set to θ2. The second straight side L2 is an example of a third side in the present disclosure, and the second oblique side D2 is an example of a fourth side in the present disclosure.

[0027] Similarly to the above-described first recess 302, the second recess 303 is formed such that the ratio of the length V2 of the second oblique side D2 along the thickness direction of the base material 30 to the length H2 of the second oblique side D2 along the direction perpendicular to the thickness direction of the base material 30 is greater than 1 / 6 and smaller than 1. That is, the second recess 303 is formed such that the ratio of V2 to H2 is greater than 1:6 and smaller than 1:1. In other words, when the length V2 of the second hypotenuse D2 in the thickness direction of the base material 30 is 1, the second recess 303 is formed so that the length H2 of the second hypotenuse D2 in the direction perpendicular to the thickness direction of the base material 30 is smaller than 6 and greater than 1, that is, H2 is smaller than 6 times V2 and greater than 1.

[0028] In this embodiment, the first recess 302 and the second recess 303 are formed such that the angle θ1 of the first hypotenuse D1 of the first recess 302 is larger than the angle θ2 of the second hypotenuse D2 of the second recess 303. That is, the first recess 302 and the second recess 303 are formed so that the ratio of V1 to H1 in the first recess 302 and the ratio of V2 to H2 in the second recess 303 are different. For example, the first recess 302 and the second recess 303 are formed such that the ratio of V1 to H1 in the first recess 302 is 1 / 3, and the ratio of V2 to H2 in the second recess 303 is 1 / 4. Here, in this embodiment, the first recess 302 and the second recess 303 are formed so that the angle θ1 of the first hypotenuse D1 is larger than the angle θ2 of the second hypotenuse D2, so that the light incident on the first recess 302 is reflected inside the recess more than the light incident on the second recess 303. Therefore, the light reflectance of the first recess 302 is lower than that of the second recess 303. As a result, the value of the lightness L* of the first region 21 is smaller than that of the second region 22. In other words, the angle of the hypotenuse of the recess is made larger in a portion where a lower lightness black is desired.

[0029] [Dial manufacturing method] Next, a method for manufacturing the dial 2 will be described. First, a plurality of the first recesses 302 are formed on the surface 301 of the base material 30 in the first region 21 of the dial 2. For example, the first recesses 302 are formed on the surface 301 of the base material 30 by machining, laser machining, chemical removal machining, polishing, forging, casting, or the like. At this time, the first recesses 302 are formed so that the ratio of the length V1 of the first hypotenuse D1 along the thickness direction of the base material 30 to the length H1 of the first hypotenuse D1 along the direction perpendicular to the thickness direction of the base material 30 is greater than 1 / 6 and smaller than 1, thereby forming a plurality of cone-shaped protrusions on the surface 301.

[0030] Next, a plurality of the second recesses 303 are formed on the surface 301 of the base material 30 in the second region 22 of the dial 2. For example, the second recesses 303 are formed on the surface 301 of the base material 30 by cutting, laser processing, chemical removal, polishing, forging, casting, or other processing. At this time, the second recesses 303 are formed so that the ratio of the length V2 of the second oblique side D2 along the thickness direction of the base material 30 to the length H2 of the second oblique side D2 along the direction perpendicular to the thickness direction of the base material 30 is greater than 1 / 6 and smaller than 1, thereby forming a plurality of conical protrusions on the surface 301. The processing method for forming the first recess 302 and the second recess 303 is not limited.

[0031] Here, in this embodiment, as described above, the first recess 302 and the second recess 303 are formed so that the angle θ1 of the first hypotenuse D1 in the first recess 302 is larger than the angle θ2 of the second hypotenuse D2 in the second recess 303. In other words, the first recess 302 and the second recess 303 are formed so that the ratio of V1 to H1 in the first recess 302 and the ratio of V2 to H2 in the second recess 303 are different.

[0032] Then, an underlayer 31, a multilayer film 32, and a protective layer 33 are laminated on the surface 301 of the base material 30 in the first region 21 and the second region 22. Specifically, after the underlayer 31 is formed on the surface 301, a multilayer film 32 having a color absorbing film 321 and a color adjustment film 322 is formed by ion-assisted deposition, ion plating deposition, vacuum deposition, sputtering, or the like. Then, a protective layer 33 is laminated on the surface of the multilayer film 32. In this way, the dial 2 can be manufactured. Furthermore, the timepiece 1 can be manufactured by using the dial 2 manufactured by this manufacturing method in the timepiece 1. In this embodiment, the first recess 302 and the second recess 303 are formed using processes such as cutting, laser processing, chemical removal, polishing, forging, casting, etc., so that the inclinations of the hypotenuses D1, D2 in the first recess 302 and the second recess 303 can be changed as desired.

[0033] Fig. 9 is a diagram showing the relationship between the ratio of the length V of the oblique side D in the thickness direction of the substrate to the length H of the oblique side D in the direction perpendicular to the thickness direction of the substrate, and the lightness L*. In Fig. 9, a recess is formed in a substrate made of brass such that the ratio of the length V of the oblique side in the thickness direction of the substrate to the length H of the oblique side in the direction perpendicular to the thickness direction of the substrate is 1:1 to 1:10, and a base layer, a multilayer film, and a protective layer are laminated on the surface of the substrate, and the lightness L* is measured. The lightness L* is measured using a spectrophotometer, and the measurement conditions are regular reflection light measurement, light source D65, and viewing angle 10°.

[0034] 9, the multilayer film has the same configuration as the color absorbing film 321 and the color adjustment film 322 shown in FIG. 4 and FIG. 7, and is formed so that when the multilayer film is arranged on a plane, the lightness L* value is 20 when viewed from the thickness direction of the multilayer film. In other words, it is difficult to make the lightness L* value smaller than 20 by using only the multilayer film. Moreover, the base material having the recesses formed therein is formed so that the lightness L* value is 32 when viewed from the thickness direction of the base material in a planar view when the multilayer film is not laminated. In this disclosure, lightness L* refers to a lightness value in the L*a*b* color space defined by the CIE (Commission Internationale d'Eclairage; International Commission on Illumination). An L* value of "0" represents the lightness of an object that does not reflect light at all (completely absorbs light), and an L* value of "100" represents the lightness value of white that completely reflects light.

[0035] As shown in FIG. 9, it was suggested that the value of the lightness L* decreases as the ratio of the length V of the hypotenuse in the thickness direction of the substrate 30 to the length H of the hypotenuse D in the direction perpendicular to the thickness direction of the substrate 30 increases. In particular, when the ratio of the length V of the hypotenuse in the thickness direction of the substrate 30 to the length H of the hypotenuse D in the direction perpendicular to the thickness direction of the substrate 30 is greater than 1:6 and smaller than 1:1 (the region between 1 and 6 on the horizontal axis showing the V:H ratio in FIG. 9), that is, when the ratio of the length V of the hypotenuse D in the thickness direction of the substrate 30 to the length H of the hypotenuse D in the direction perpendicular to the thickness direction of the substrate 30 is greater than 1 / 6 and smaller than 1, it was suggested that the value of the lightness L* can be set to 5 or more and 20 or less. This is presumably because the inclination of the hypotenuse D with respect to the straight side L increases by increasing the ratio of the length V of the hypotenuse in the thickness direction of the substrate to the length H of the hypotenuse in the direction perpendicular to the thickness direction of the substrate, and therefore the reflectance of the light incident on the recess can be reduced.

[0036] Furthermore, the multilayer film contains three layers of chrome color absorbing films made from materials containing Cr, and has multiple locations where the chrome color absorbing films and aluminum oxide color adjustment films are stacked. This reduces the reflectance of light incident on the multilayer film, and it is presumed that the lightness L* value of the multilayer film itself can be set to a low value of 18. As a result, in this embodiment, the first region and the second region of the base material exhibit a low-lightness black color in plan view in the thickness direction of the base material.

[0037] Here, in this embodiment, as described above, the first recess 302 and the second recess 303 are formed so that the ratio of V1 to H1 in the first recess 302 and the ratio of V2 to H2 in the second recess 303 are different. As a result, the reflection angle of light incident on the first recess 302 and the reflection angle of light incident on the second recess 303 are different, so that the reflectance of light incident on the first recess 302 and the second recess 303 can be changed. Therefore, a black pattern can be formed with a slight difference in brightness between the first region 21 and the second region 22.

[0038] [Effects of the embodiment] According to this embodiment, the following effects can be obtained. In this embodiment, the base material 30 has a first region 21 in which a plurality of first recesses 302 are formed, and a second region 22 in which a plurality of second recesses 303 are formed. The first region 21 and the second region 22 have a lightness L* value of 5 or more and 20 or less in a plan view seen from the thickness direction of the base material 30. As a result, the first region 21 and the second region 22 in the base material 30 have low lightness and exhibit a black color. Here, the first recess 302 in the first region 21 is defined by a first straight side L1 and a first oblique side D1 that is inclined with respect to the first straight side L1 and abuts against the first straight side L1 at an end. The second recess 303 in the second region 22 is defined by a second straight side L2 and a second oblique side D2 that is inclined with respect to the second straight side L2 and abuts against the second straight side L2 at an end. The inclination angle θ1 of the first oblique side D1 with respect to the direction perpendicular to the thickness direction of the base material 30 is different from the inclination angle θ2 of the second oblique side D2 with respect to the direction perpendicular to the thickness direction of the base material 30. As a result, the reflection angle of the light incident on the first recess 302 is different from the reflection angle of the light incident on the second recess 303, so that the reflectance of the light incident on the first recess 302 and the second recess 303 can be changed. Therefore, a black pattern with a slight difference in brightness between the first region 21 and the second region 22 can be formed.

[0039] In this embodiment, the first recess 302 is formed so that the ratio of the length V1 of the first oblique side D1 in the thickness direction of the substrate 30 to the length H1 of the first oblique side D1 in the direction perpendicular to the thickness direction of the substrate 30 is greater than 1:6 and smaller than 1:1. The ratio of the length V1 of the first oblique side D1 along the thickness direction of the substrate 30 to the length H1 of the first oblique side D1 along the direction perpendicular to the thickness direction of the substrate 30 is greater than 1 / 6 and smaller than 1. The second recess 303 is formed so that the ratio of the length V2 of the second oblique side D2 along the thickness direction of the substrate 30 to the length H2 of the second oblique side D2 along the direction perpendicular to the thickness direction of the substrate 30 is greater than 1 / 6 and smaller than 1. This makes it possible to reduce the reflectance of light incident on the first recess 302 and the second recess 303, so that the first region 21 and the second region 22 can exhibit a low-lightness black color.

[0040] In this embodiment, the multilayer film 32 is made of Ta2O5, SiO2, TiO2, Al2O3, ZrO2, Nb2O5, HfO2, Na5Al3F 14 Since the color adjustment film 322 is made of a material containing at least one of Na3AlF6, AlF3, MgF2, CaF2, BaF2, YF3, LaF3, CeF3, and NdF3, it is possible to improve the stability and durability of the appearance of the dial 2. Furthermore, it is possible to increase the range of variations in black colors with low lightness L* values.

[0041] In this embodiment, the multilayer film 32 includes a color absorbing film 321 made of a material containing at least one of Cr, Ag, Pt, Au, Cu, Al, Cr, Sn, Fe, and Ti, thereby giving the dial 2 a luxurious appearance.

[0042] In this embodiment, the multilayer film 32 includes three or more layers of the chrome color absorbing film 3211 made of a material containing Cr, and therefore it is possible to reduce the reflectance of light incident on the multilayer film 32. Therefore, it is possible to reduce the reflectance of light incident on the first recess 302 and the second recess 303, and therefore it is possible to present a low-lightness black color in the first region 21 and the second region 22.

[0043] In this embodiment, the multilayer film 32 has multiple locations where the chrome color absorbing film 3211 and the aluminum oxide color adjustment film 3221 are stacked, so that the reflectance of light incident on the multilayer film 32 can be made lower, and a black color with a very low lightness L* value can be presented.

[0044] In this embodiment, the first recess 302 and the second recess 303 are formed by any one of cutting, laser processing, chemical removal, polishing, and forging / casting, thereby allowing the inclination of the first oblique side D1 of the first recess 302 and the second oblique side D2 of the second recess 303 to be changed as desired.

[0045] In this embodiment, the multilayer film 32 is formed by using any one of ion-assisted deposition, ion plating deposition, vacuum deposition, and sputtering, so that the layer structure of the multilayer film 32 can be changed as desired.

[0046] [Second embodiment] Next, a second embodiment of the present disclosure will be described with reference to Fig. 10 and Fig. 11. The second embodiment differs from the first embodiment described above in that a first recess 302A in a first region 21A is defined by a curved first side L3 and a curved second side D3. In the second embodiment, the same or similar configurations as those in the first embodiment are denoted by the same reference numerals, and descriptions thereof will be omitted or simplified.

[0047] [First area] Fig. 10 is a cross-sectional view showing a main part of the first region 21A, and Fig. 11 is an enlarged cross-sectional view showing a main part of the first region 21A. Figs. 10 and 11 are cross-sectional views of the base material 30A in the first region 21A cut in the thickness direction. As shown in FIGS. 10 and 11, the first region 21A is configured to include a substrate 30A, an underlayer 31A, a multilayer film 32A, and a protective layer 33A, similar to the first embodiment described above.

[0048] [First recess] The first recess 302A is defined by a first side L3 and a second side D3 that is inclined with respect to the first side L3 and abuts the first side L3 at an end thereof in a cross section of the base material 30A cut in the thickness direction. In this embodiment, the first side L3 and the second side D3 are curved. Similarly to the first embodiment described above, the first recess 302A is formed so that a plurality of cone-shaped protrusions are formed on the surface 301A. Although not shown in the drawings, in this embodiment, the first and second sides that define the second recess in the second region are also curved.

[0049] Similarly to the first embodiment described above, the first recess 302A is formed such that the ratio of the length V3 of the second side D3 along the thickness direction of the base material 30A to the length H3 of the second side D3 along the direction perpendicular to the thickness direction of the base material 30A is greater than 1 / 6 and smaller than 1. That is, the first recess 302 is formed such that the ratio of V3 to H3 is greater than 1:6 and smaller than 1:1. In this embodiment, the angle of the tangent at the midpoint of the second side D3 with respect to the direction perpendicular to the thickness direction of the base material 30A is θ3. The first recess 302A and the second recess are formed so that the angle θ3 is larger than the angle θ between the tangent at the midpoint of the second side of the second region and the direction perpendicular to the thickness direction of the base material 30A.

[0050] [Effects of the second embodiment] According to this embodiment, the following effects can be obtained. In this embodiment, the first side L3 and the second side D3 that define the first recess 302A are curved. This means that the sides that define the first recess 302A are not limited to straight lines, which increases the degree of freedom in processing for forming the first recess 302A.

[0051] [Variations] The present disclosure is not limited to the above-described embodiments, and modifications, improvements, etc. within the scope that can achieve the object of the present disclosure are included in the present disclosure.

[0052] In each of the above-described embodiments, the first recess 302, 302A and the second recess 303 are formed by any one of cutting, laser processing, chemical removal, polishing, and forging / casting, but are not limited thereto. For example, the first recess and the second recess may be formed by femto laser processing or pico laser processing. This allows the inclination of the second side of the first recess and the inclination of the fourth side of the second recess to be changed with higher accuracy.

[0053] In each of the above-described embodiments, the first area 21 and the second area 22 are formed in the main body of the dial 2, but this is not limited thereto. For example, the first area may be configured as an hour mark area and the second area may be configured as the dial main body area, or the first area may be configured as a symbol area showing the company name or the like and the second area may be configured as the dial main body area. Furthermore, the timepiece component of the present disclosure may be configured as a dial and a pointer, the first area may be configured as the pointer, and the second area may be configured as the dial main body area.

[0054] In each of the above-described embodiments, the first recess 302 and the second recess 303 are formed so that the angle θ1 of the first hypotenuse D1 of the first recess 302 in the first region 21 is larger than the angle θ2 of the second hypotenuse D2 of the second recess 303 in the second region 22, but this is not limiting. For example, the first recess and the second recess may be formed so that the angle of the second side of the second recess in the second region is larger than the angle of the first side of the first recess in the first region.

[0055] In the above-described embodiment, the timepiece part of the present disclosure is configured as the dial 2, but is not limited to this. For example, the timepiece part of the present disclosure may be configured as any one of a case, a dial ring, a bezel, a movement, a hand, an abbreviated character, and an oscillating weight.

[0056] [Summary of this disclosure] The watch component disclosed herein comprises a substrate having a first region on the surface of which a plurality of first recesses are formed, and a second region on the surface of which a plurality of second recesses are formed, and a multilayer film covering at least a portion of the first region and the second region, wherein, in a cross-sectional view of the substrate cut in the thickness direction, the plurality of first recesses are defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end thereof, and, in the cross-sectional view, the plurality of second recesses are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end thereof, and, in the cross-sectional view, an angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate is different from an angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate, and, in a planar view seen from the thickness direction of the substrate, the first region and the second region have a lightness L* value in the L*a*b* color space of 5 or more and 20 or less. In the present disclosure, the substrate has a first region in which a plurality of first recesses are formed, and a second region in which a plurality of second recesses are formed. The first region and the second region have a lightness L* value in the L*a*b* color space of 5 or more and 20 or less in plan view from the thickness direction of the substrate. As a result, the first region and the second region in the substrate have low lightness and exhibit a black color. Here, the first recess in the first region is defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end, and the second recess in the second region is defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end. The angle of inclination of the second side with respect to the direction perpendicular to the thickness direction of the substrate is different from the angle of inclination of the fourth side with respect to the direction perpendicular to the thickness direction of the substrate. This makes it possible to change the reflectance of light incident on the first recess and the second recess, since the reflection angle of light incident on the first recess and the reflection angle of light incident on the second recess are different, and therefore it is possible to form a black pattern with a slight difference in brightness between the first region and the second region.

[0057] In the watch component of the present disclosure, in the cross-sectional view, the ratio of the length of the second side along the thickness direction of the substrate to the length of the second side along the direction perpendicular to the thickness direction of the substrate may be greater than 1 / 6 and smaller than 1, and in the cross-sectional view, the ratio of the length of the fourth side along the thickness direction of the substrate to the length of the fourth side along the direction perpendicular to the thickness direction of the substrate may be greater than 1 / 6 and smaller than 1. This makes it possible to reduce the reflectance of light incident on the first recess and the second recess, so that the first region and the second region can exhibit a low-lightness black color.

[0058] In the timepiece component of the present disclosure, the timepiece component may be configured as a dial, the first area may be configured as an hour mark portion, and the second area may be configured as a dial main body portion.

[0059] In the timepiece component of the present disclosure, the timepiece component may be configured as a dial, the first area may be configured as a symbol portion, and the second area may be configured as a dial main body portion.

[0060] In the timepiece component of the present disclosure, the timepiece component may be configured as a dial and hands, the first area may be configured as the hands, and the second area may be configured as a dial main body portion.

[0061] In the watch component of the present disclosure, the multilayer film is made of Ta2O5, SiO2, TiO2, Al2O3, ZrO2, Nb2O5, HfO2, Na5Al3F 14 The light emitting diode may be provided with a color adjustment film made of a material containing at least one of Na3AlF6, AlF3, MgF2, CaF2, BaF2, YF3, LaF3, CeF3, and NdF3. As a result, these inorganic substances have high chemical stability, which makes it possible to improve the stability and durability of the appearance of watch parts. Furthermore, it is possible to increase the range of variations in black with low lightness L* values.

[0062] In the timepiece component of the present disclosure, the multilayer film may be provided with a color absorbing film made of a material containing at least one of Cr, Ag, Pt, Au, Cu, Al, Cr, Sn, Fe, and Ti. This allows the watch part to have a luxurious appearance.

[0063] In the timepiece component of the present disclosure, the color absorbing film may include three or more layers of films made of a material containing Cr. As a result, the multilayer film includes three or more color absorbing films made of a material containing Cr, so that the reflectance of light incident on the multilayer film can be reduced, and therefore the reflectance of light incident on the first and second recesses can be reduced, so that the first and second regions can exhibit a low-lightness black color.

[0064] (Claim 9) The timepiece component of the present disclosure may have a plurality of locations where the color absorbing film made of a material containing Cr and the color adjusting film made of a material containing Al2O3 are laminated. This makes it possible to reduce the reflectance of light incident on the multilayer film, thereby enabling it to present a black color with an extremely low lightness L* value.

[0065] The watch component disclosed herein comprises a substrate having a first region on the surface of which a plurality of first recesses are formed, and a second region on the surface of which a plurality of second recesses are formed, and a multilayer film covering at least a portion of the first region and the second region, wherein, in a cross-sectional view of the substrate cut in the thickness direction, the plurality of first recesses are defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end thereof, and in the cross-sectional view, the plurality of second recesses are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end thereof, and in the cross-sectional view, the angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate and the angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate are different, and the multilayer film includes three or more layers of color absorbing films made of a material containing Cr. In the present disclosure, the substrate has a first region in which a plurality of first recesses are formed, and a second region in which a plurality of second recesses are formed. The first region and the second region are at least partially covered by a multilayer film. In this case, the multilayer film includes three or more layers of color absorbing films made of a material containing Cr, so that the reflectance of light incident on the multilayer film can be reduced. As a result, the first region and the second region in the substrate have low brightness and exhibit a black color. Here, the first recess in the first region is defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end, and the second recess in the second region is defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end. The angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate is different from the angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate. This makes it possible to change the reflectance of light incident on the first recess and the second recess, since the reflection angle of light incident on the first recess and the reflection angle of light incident on the second recess are different, and therefore it is possible to form a black pattern with a slight difference in brightness between the first region and the second region.

[0066] The timepiece of the present disclosure is characterized by including the timepiece component described above.

[0067] The manufacturing method of the disclosed watch component includes a base material having a first region on the surface of which a plurality of first recesses are formed and a second region on the surface of which a plurality of second recesses are formed, and a multilayer film covering at least a portion of the first region and the second region, the method comprising the steps of: forming the plurality of first recesses and the second recesses on the surface of the base material; and laminating the multilayer film on at least a portion of the first region and the second region of the base material on which the plurality of first recesses and the plurality of second recesses are formed, and in a cross-sectional view of the base material cut in the thickness direction, the plurality of first recesses are the first region and the second region are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the first side at an end thereof, and in the cross-sectional view, the second recesses are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end thereof, and in the cross-sectional view, an angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the base material is different from an angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the base material, and the first region and the second region have a lightness L* value of 5 or more and 20 or less in L*a*b* color space in a planar view seen from the thickness direction of the base material. In the present disclosure, the substrate has a first region in which a plurality of first recesses are formed, and a second region in which a plurality of second recesses are formed. The first region and the second region are at least partially covered by a multilayer film. In this case, the multilayer film includes three or more layers of color absorbing films made of a material containing Cr, so that the reflectance of light incident on the multilayer film can be reduced. As a result, the first region and the second region in the substrate have low brightness and exhibit a black color. Here, the first recess in the first region is defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end, and the second recess in the second region is defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end. The angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate is different from the angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate. This makes it possible to change the reflectance of light incident on the first recess and the second recess, since the reflection angle of light incident on the first recess and the reflection angle of light incident on the second recess are different, and therefore it is possible to form a black pattern with a slight difference in brightness between the first region and the second region.

[0068] The manufacturing method of the watch component of the present disclosure is a manufacturing method of a watch component including a base material having a first region on the surface of which a plurality of first recesses are formed and a second region on the surface of which a plurality of second recesses are formed, and a multilayer film covering at least a portion of the first region and the second region, the manufacturing method including the steps of forming the plurality of first recesses and the second recesses on the surface of the base material, and laminating the multilayer film on at least a portion of the first region and the second region of the base material on which the plurality of first recesses and the plurality of second recesses are formed, and In a plan view, the multiple first recesses are defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end thereof, and in a cross-sectional view, the multiple second recesses are defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end thereof, and in the cross-sectional view, an angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate is different from an angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate, and the multilayer film includes three or more layers of color absorbing films made of a material containing Cr. In the present disclosure, the substrate has a first region in which a plurality of first recesses are formed, and a second region in which a plurality of second recesses are formed. The first region and the second region are at least partially covered by a multilayer film. In this case, the multilayer film includes three or more layers of color absorbing films made of a material containing Cr, so that the reflectance of light incident on the multilayer film can be reduced. As a result, the first region and the second region in the substrate have low brightness and exhibit a black color. Here, the first recess in the first region is defined by a first side and a second side that is inclined with respect to the first side and abuts the first side at an end, and the second recess in the second region is defined by a third side and a fourth side that is inclined with respect to the third side and abuts the third side at an end. The angle of inclination of the second side with respect to a direction perpendicular to the thickness direction of the substrate is different from the angle of inclination of the fourth side with respect to a direction perpendicular to the thickness direction of the substrate. This makes it possible to change the reflectance of light incident on the first recess and the second recess, since the reflection angle of light incident on the first recess and the reflection angle of light incident on the second recess are different, and therefore it is possible to form a black pattern with a slight difference in brightness between the first region and the second region.

[0069] In the manufacturing method of the watch component of the present disclosure, the first recess and the second recess may be formed using any one of cutting processing, laser processing, patterning processing, chemical removal processing, polishing processing, and forging / casting processing. This makes it possible to arbitrarily change the inclination of the second side of the first recess and the inclination of the fourth side of the second recess.

[0070] In the manufacturing method for a watch component of the present disclosure, the first recess and the second recess may be formed using femto laser processing or pico laser processing. This makes it possible to change the inclination of the second side of the first recess and the inclination of the fourth side of the second recess with higher precision.

[0071] In the manufacturing method of the watch component of the present disclosure, the multilayer film may be formed using any one of ion-assisted deposition, ion plating deposition, vacuum deposition, and sputtering. This allows the layer structure of the multilayer film to be changed as desired.

[0072] The timepiece disclosed herein is characterized in that it is constructed using timepiece parts manufactured using the method for manufacturing timepiece parts described above. [Explanation of symbols]

[0073] 1...clock, 2...dial (clock component), 3...second hand, 4...minute hand, 5...hour hand, 6...crown, 7...button A, 8...button B, 9...band, 10...case, 11...case body, 12...lug, 30,30A...base material, 31,31A...undercoat layer, 32,32A...multilayer film, 33,33A...protective layer, 301,301A...surface, 302,302A...first recess, 303...second recess, 321...color absorbing film, 322...color adjustment film, 3211...chrome color absorbing film, 3221...aluminum oxide color adjustment film, 3222...silicon dioxide color adjustment film, D1...first hypotenuse (second side), D2...second hypotenuse (fourth side), L1...first straight side (first side), L2...second straight side (third side).

Claims

1. a first region having a plurality of first recesses formed on a surface thereof; and a second region having a plurality of second recesses formed on the surface thereof. a substrate having a second region; a multilayer film covering at least a portion of the first region and the second region, In a cross-sectional view of the base material cut in the thickness direction, the plurality of first recesses are a second side inclined relative to the first side and abutting the first side at an end thereof; In the cross-sectional view, the second recesses are inclined with respect to a third side and an end and a fourth side abutting the third side, In the cross-sectional view, the inclination of the second side with respect to a direction perpendicular to the thickness direction of the base material and the inclination angle of the fourth side with respect to a direction perpendicular to the thickness direction of the base material are different. 、 The first region and the second region have an L*a* The lightness L* value in the b* color space is 5 or more and 20 or less. A watch component characterized by:

2. The timepiece component according to claim 1, In the cross-sectional view, the length of the second side along a direction perpendicular to the thickness direction of the base material is a ratio of the length of the second side along the thickness direction of the base to the length of the first side is greater than 1 / 6; and , less than 1, In the cross-sectional view, the length of the fourth side along a direction perpendicular to the thickness direction of the base material is the ratio of the length of the fourth side along the thickness direction of the base to the length of the fourth side along the thickness direction of the base is greater than 1 / 6; and , less than 1 A watch component characterized by:

3. The timepiece component according to claim 1, The timepiece component is configured as a dial, the first region is configured as an hour mark portion, The second region is configured as a dial body portion. A watch component characterized by:

4. The timepiece component according to claim 1, The timepiece component is configured as a dial, The first region is configured as a symbol portion, The second region is configured as a dial body portion. A watch component characterized by:

5. The timepiece component according to claim 1, The timepiece components are configured as a dial and hands, The first region is configured as a guideline; The second region is configured as a dial body portion. A watch component characterized by:

6. The timepiece component according to claim 1, The multilayer film is made of Ta 2 O 5 , SiO 2 , TiO 2 , Al 2 O 3 , ZrO 2 , Nb 2 O 5 , HfO 2 <h2 style=";text-align:left;direction:ltr">、Na<h2 style=";text-align:left;direction:ltr"> 5 <h2 style=";text-align:left;direction:ltr"> Al<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> F<h2 style=";text-align:left;direction:ltr"> 14 <h2 style=";text-align:left;direction:ltr"> 、Na<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> AlF<h2 style=";text-align:left;direction:ltr"> 6 <h2 style=";text-align:left;direction:ltr"> 、AlF<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> 、MgF<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> 、CaF<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> 、BaF<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> 、YF<h2 style=";text-align:left;direction:ltr"> 3 <h2 style=";text-align:left;direction:ltr"> 、La F 3 , CeF 3 , and NdF 3 A color adjustment film made of a material containing at least one of Prepare A watch component characterized by:

7. 7. The timepiece component according to claim 6, The multilayer film is made of at least one of Cr, Ag, Pt, Au, Cu, Al, Cr, Sn, Fe, and Ti. A color absorbing film is provided which is made of at least one material. A watch component characterized by:

8. The timepiece component according to claim 7, The color absorbing film has three or more layers made of a material containing Cr. A watch component characterized by:

9. The timepiece component according to claim 8, The multilayer film includes the color absorbing film made of a material containing Cr and Al 2 O 3 Materials containing and the color adjustment film is laminated at a plurality of locations. A watch component characterized by:

10. a first region having a plurality of first recesses formed on a surface thereof; and a second region having a plurality of second recesses formed on the surface thereof. a substrate having a second region; a multilayer film covering at least a portion of the first region and the second region, In a cross-sectional view of the base material cut in the thickness direction, the plurality of first recesses are a second side inclined relative to the first side and abutting the first side at an end thereof; In the cross-sectional view, the second recesses are inclined with respect to a third side and an end and a fourth side abutting the third side, In the cross-sectional view, the inclination of the second side with respect to a direction perpendicular to the thickness direction of the base material and the inclination angle of the fourth side with respect to a direction perpendicular to the thickness direction of the base material are different. 、 The multilayer film includes three or more color absorbing films made of a material containing Cr. A watch component characterized by:

11. A watch component according to claim 1 or claim 10 is provided. A watch characterized by

12. a first region having a plurality of first recesses formed on a surface thereof; and a second region having a plurality of second recesses formed on the surface thereof. a substrate having a second region covering the first region and at least a portion of the second region; A method for manufacturing a timepiece component having a multilayer film, forming a plurality of the first recesses and the second recesses on a surface of the substrate; The first region and the second region of the substrate in which the first recesses and the second recesses are formed and laminating the multilayer film on at least a portion of the second region, In a cross-sectional view of the base material cut in the thickness direction, the plurality of first recesses are a second side inclined relative to the first side and abutting the first side at an end thereof; In the cross-sectional view, the second recesses are inclined with respect to a third side and an end and a fourth side abutting the third side, In the cross-sectional view, the inclination of the second side with respect to a direction perpendicular to the thickness direction of the base material and the inclination angle of the fourth side with respect to a direction perpendicular to the thickness direction of the base material are different. 、 The first region and the second region have an L*a* The lightness L* value in the b* color space is 5 or more and 20 or less. A method for manufacturing a watch part, comprising:

13. a first region having a plurality of first recesses formed on a surface thereof; and a second region having a plurality of second recesses formed on the surface thereof. a substrate having a second region covering the first region and at least a portion of the second region; A method for manufacturing a timepiece component having a multilayer film, forming a plurality of the first recesses and the second recesses on a surface of the substrate; The first region and the second region of the substrate in which the first recesses and the second recesses are formed and laminating the multilayer film on at least a portion of the second region, In a cross-sectional view of the base material cut in the thickness direction, the plurality of first recesses are a second side inclined relative to the first side and abutting the first side at an end thereof; In the cross-sectional view, the second recesses are inclined with respect to a third side and an end and a fourth side abutting the third side, In the cross-sectional view, the inclination of the second side with respect to a direction perpendicular to the thickness direction of the base material and the inclination angle of the fourth side with respect to a direction perpendicular to the thickness direction of the base material are different. 、 The multilayer film includes three or more color absorbing films made of a material containing Cr. A method for manufacturing a watch part, comprising:

14. The method for manufacturing a watch component according to claim 12 or 13, The first recess and the second recess can be formed by cutting, laser processing, patterning, chemical processing, or the like. It is formed by one of the following processes: chemical removal, grinding, and forging / casting. A method for manufacturing a watch part, comprising:

15. 15. The method for manufacturing a watch component according to claim 14, The first recess and the second recess are formed by femto laser processing or pico laser processing. formed using A method for manufacturing a watch part, comprising:

16. The method for manufacturing a watch component according to claim 12 or 13, The multilayer film can be formed by ion-assisted deposition, ion plating deposition, vacuum deposition, and formed using one of the sputtering methods A method for manufacturing a watch part, comprising:

17. A timepiece component manufactured by the method for manufacturing a timepiece component according to claim 12 or 13. It is constructed using A watch characterized by

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