Watch components, watch, and method for manufacturing watch components

Abstract

To provide watch parts capable of changing the hue thereof, a watch, and a method of manufacturing the watch parts.SOLUTION: A watch part comprises a base material with a first area having multiple recesses formed on a surface thereof and a second area with a smooth surface, and a multilayer film at least partially covering the base material. In a cross-sectional view obtained by cutting the base material in a thickness direction, each of the multiple recesses is defined by a first side and a second side inclined relative to the first side and abutting the first side at an end. A hue angle of the first area is greater than a hue angle of the second area.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses a timepiece part in which a color - adjusting film for adjusting a color tone is laminated on a substrate that is a metallic luster part. In the timepiece part of Patent Document 1, by adjusting the color tone of the appearance with the metallic luster part and the color - adjusting film, it is possible to achieve excellent aesthetic properties without using a noble metal as the main material.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, although it is possible to give an aesthetic property like that of a noble metal, there is a problem that the hue cannot be changed because only a single - color decoration can be applied.

Means for Solving the Problems

[0005] The timepiece part of the present disclosure includes a base material having a first region in which a plurality of concave portions are formed on the surface and a second region in which the surface is smoothed, and a multilayer film covering at least a part of the base material. In a cross - sectional view obtained by cutting the base material in the thickness direction, the plurality of concave portions are defined by a first side and a second side that is inclined with respect to the first side and abuts on the first side at an end. The hue angle of the first region is larger than the hue angle of the second region.

[0006] The timepiece of the present disclosure is characterized by including the timepiece part.

[0007] A method for manufacturing a watch component according to the present disclosure comprises a substrate having a first region on which a plurality of recesses are formed on its surface and a second region on which the surface is smooth, and a multilayer film covering at least a part of the substrate, the method comprising the steps of forming a plurality of recesses on the surface of the first region of the substrate, and laminating the multilayer film on at least a part of the surface of the substrate, wherein, in a cross-sectional view obtained by cutting the substrate in the thickness direction, the plurality of 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 its end.

[0008] The clock according to this disclosure is characterized by being constructed using clock components manufactured by the method for manufacturing clock components described above. [Brief explanation of the drawing]

[0009] [Figure 1] A front view showing the clock according to the first embodiment. [Figure 2] A cross-sectional view showing the main part of the hour marker of the first embodiment. [Figure 3] An enlarged cross-sectional view showing the main part of the hour marker of the first embodiment. [Figure 4] An enlarged perspective view showing the main part of the hour marker of the first embodiment. [Figure 5] A cross-sectional view showing the main part of the dial body of the first embodiment. [Figure 6] An enlarged cross-sectional view showing the main part of the dial body of the first embodiment. [Figure 7] This diagram shows the relationship between 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 the hue angle. [Figure 8] A schematic front view showing the dial body of the second embodiment. [Figure 9] A cross-sectional view showing the main part of the dial body of the second embodiment. [Figure 10] An enlarged cross-sectional view showing the main part of the dial body of the second embodiment. [Figure 11] A cross-sectional view showing the main part of the first region of the modified example. [Modes for carrying out the invention]

[0010] [Embodiment] Hereinafter, a clock 1 according to an embodiment of this disclosure will be described with reference to the drawings. Figure 1 is a front view showing watch 1. In this embodiment, watch 1 is configured as a wristwatch worn on the user's wrist. As shown in Figure 1, the watch 1 comprises a metal case 2. Inside the case 2 are a disc-shaped dial 10, a second hand 3, a minute hand 4, an hour hand 5, a crown 7, a button A 8, and a button B 9. The dial 10 has a dial body 11 and hour markers 12 provided on the dial body 11. Note that the dial 10 is an example of a watch component of this disclosure.

[0011] [Hour Mark] Figure 2 is a cross-sectional view showing the main part of the hour mark 12, Figure 3 is an enlarged cross-sectional view showing the main part of the hour mark 12, and Figure 4 is an enlarged perspective view showing the main part of the hour mark 12. Figures 2 and 3 are cross-sectional views of the base material 30 at the hour mark 12, cut in the thickness direction. As shown in Figures 2 to 4, the hour mark 12 is composed of a substrate 30 and a multilayer film 31. In this embodiment, the substrate 30 is covered entirely by the multilayer film 31. That is, the multilayer film 31 is laminated so as to cover the entire surface 301 of the substrate 30. Note that the hour mark 12 is not limited to the above configuration; for example, the multilayer film 31 may be laminated so as to cover a part of the surface 301 of the substrate 30.

[0012] [Base material] The base material 30 is made of a metal such as iron, brass, or aluminum, or a resin. If the base material 30 is made of resin, the resin may be a non-transparent resin that does not transmit light, or a translucent resin that transmits light. And in the present embodiment, a plurality of recesses 32 are formed on the surface 301 of the base material 30 in the hour mark 12. Note that the hour mark 12 is an example of the first region of the present disclosure.

[0013] [Recess] In a cross-sectional view of the base material 30 cut in the thickness direction, the recess 32 is defined by a straight side L and a hypotenuse D that is inclined with respect to the straight side L and abuts against the straight side L at an end. And the straight side L is inclined so as to be line-symmetric with the hypotenuse D with respect to the symmetry axis A1 extending in the thickness direction of the base material 30. More specifically, in the present embodiment, as shown in FIG. 4, the recess 32 is formed such that a plurality of conical protrusions are formed on the surface 301. Note that the straight side L is an example of the first side of the present disclosure, and the hypotenuse D is an example of the second side of the present disclosure. Also, the depth of the recess 32 is not particularly limited. For example, the depth of the recess 32 is about several tens of μm.

[0014] And in the present embodiment, the recess 32 is formed such that the ratio of the length V of the hypotenuse D in the thickness direction of the base material 30 to the length H of the hypotenuse D in the direction orthogonal to the thickness direction of the base material 30 is greater than 1:6. That is, the recess 32 is formed such that the ratio of V to H is greater than 1 / 6. In other words, when the length V of the hypotenuse D in the thickness direction of the base material 30 is set to 1, the length H of the hypotenuse D in the direction orthogonal to the thickness direction of the base material 30 is made smaller than 6, that is, the recess 32 is formed such that H is smaller than 6 times V.

[0015] [Multilayer film] The multilayer film 31 includes a color absorption film 311 and a color adjustment film 312, and is laminated on the surface 301 side of the base material 30. The color absorption film 311 is laminated on the surface 301 side of the base material 30 and is formed using a metal. As the metal constituting the color absorption film 311, Ag, Pt, Au, Cu, Al, Cr, Sn, Fe, Ti, etc., and alloys thereof are preferable. Furthermore, in this embodiment, the color absorption film 311 is made of a thin film with a thickness sufficient to transmit incident light. This makes it possible to obtain a high-quality appearance for the dial 10. The method for forming the color absorption film 311 is not particularly limited, but examples include ion-assisted deposition, ion plating deposition, vacuum deposition, and sputtering.

[0016] The color adjustment film 312 is laminated on the surface 301 side of the substrate 30. In this embodiment, the color absorption film 311 and the color adjustment film 312 are laminated on the surface 301 of the substrate 30 in this order. That is, the color absorption film 311 is positioned between the surface 301 of the substrate 30 and the color adjustment film 312. The color adjustment film 312 adjusts the color tone by optical interference. In this embodiment, the color adjustment film 312 is composed of a multilayer film including an inorganic film. That is, the color adjustment film 312 is configured as a laminate comprising a plurality of inorganic layers 3121. The inorganic layer 3121 is preferably composed of oxides or fluorides of inorganic materials, such as Ta2O5, SiO2, TiO2, Al2O3, ZrO2, Nb2O5, HfO2, and Na5Al3F 14 It is preferable that the material is composed of at least one of the following: Na3AlF6, AlF3, MgF2, CaF2, BaF2, YF3, LaF3, CeF3, and NdF3. Furthermore, it is more preferable that the multiple inorganic layers 3121 be composed of layers made of different materials selected from the above group. This allows for a wider range of colors that can be expressed as the dial 10. In addition, since these inorganic oxides have high chemical stability, the stability and durability of the appearance of the dial 10 can be increased. The multilayer film 31 is not limited to the above configuration; a color adjustment film 312 may be laminated on the surface 301 side of the substrate 30, and a color absorption film 311 may be laminated on the color adjustment film 312, and the order of the color absorption film 311 and the color adjustment film 312 can be set arbitrarily. Furthermore, the color adjustment film 312 may be configured to have a thin metal film.

[0017] The method for forming each inorganic layer 3121 is not particularly limited, but examples include ion-assisted deposition, ion plating deposition, vacuum deposition, and sputtering. Furthermore, the inorganic layer 3121 is preferably made up of two or more layers, and more preferably made up of three or more layers.

[0018] [Dial body part 11] Figure 5 is a cross-sectional view showing the main part of the dial body 11, and Figure 6 is an enlarged cross-sectional view showing the main part of the dial body 11. Figures 5 and 6 are cross-sectional views of the base material 30 of the dial body 11 cut in the thickness direction. As shown in Figures 5 and 6, the dial body portion 11 is composed of the aforementioned base material 30 and multilayer film 31. In this embodiment, the surface 301 of the base material 30 in the dial body portion 11 is smooth. That is, no recesses are formed on the surface 301 of the base material 30 in the dial body portion 11. Note that the dial body portion 11 is an example of the second region of this disclosure. In this embodiment, the statement that the surface 301 of the base material 30 in the dial body portion 11 is smooth is not limited to the surface 301 being perfectly smooth, but includes, for example, a state in which the surface 301 has recesses with a depth of about 5 μm or recesses with a depth of about 10 μm, and indicates a state in which the aforementioned recesses 32 are not formed.

[0019] [Method of manufacturing a dial] Next, we will explain the manufacturing method of the dial 10. First, multiple recesses 32 are formed on the surface 301 of the base material 30 in the area where the hour markers 12 of the dial 10 are to be provided. For example, the recesses 32 are formed on the surface 301 of the base material 30 using processes such as cutting, laser processing, chemical removal, polishing, forging, or casting. In this process, the recesses 32 are formed such that the ratio of the length V of the hypotenuse D in the thickness direction of the base material 30 to the length H of the hypotenuse D in the direction perpendicular to the thickness direction of the base material 30 is greater than 1:6, thereby forming multiple conical protrusions on the surface 301. The processing method for forming the recess 32 is not specified.

[0020] Next, a multilayer film 31 is laminated onto the surface 301 of the substrate 30 in the dial body 11 and hour marker 12. Specifically, a color absorption film 311 is formed on the surface 301 of the substrate 30 by ion-assisted deposition, ion plating deposition, vacuum deposition, sputtering, etc. After that, a color adjustment film 312 composed of multiple inorganic layers 3121 is laminated by ion-assisted deposition, ion plating deposition, vacuum deposition, sputtering, etc. This allows the dial 10 to be manufactured. Furthermore, by using a dial 10 manufactured using this method in a watch 1, the watch 1 can be manufactured. Furthermore, in this embodiment, the inclination of the hypotenuse D in the recess 32 can be arbitrarily changed by forming the recess 32 using processes such as cutting, laser processing, chemical removal, polishing, forging, and casting.

[0021] Figure 7 shows the relationship between the ratio of the length of the hypotenuse in the thickness direction of the substrate (V) to the length of the hypotenuse in the direction perpendicular to the thickness direction of the substrate (H), and the hue angle difference. In Figure 7, recesses were formed in a substrate made of metal such as iron, brass, or aluminum, such that the ratio of the length of the hypotenuse in the thickness direction of the substrate (V) to the length of the hypotenuse in the direction perpendicular to the thickness direction of the substrate (H) was 1:1 to 1:10, and a multilayer film was laminated on the surface of the substrate to measure the hue angle. The difference between the hue angle of the area where the recess is formed and the hue angle of the area where the recess is not formed is shown as the hue angle difference Δh. In this disclosure, the hue angle is a value obtained from the a* and b* values ​​in the Lab display system specified by the CIE (Commission Internationale d'Eclairage; International Commission on Illumination).

[0022] As shown in Figure 7, it was suggested that the difference in hue angle Δh between areas where a recess is formed and areas where it is not increases as the ratio of the length of the hypotenuse in the thickness direction of the substrate (V) to the length of the hypotenuse in the direction perpendicular to the thickness direction of the substrate increases. This is presumed to be due to the fact that the color tone of light interfered with by the multilayer film stacked on the hypotenuse changed according to the slope of the hypotenuse. As a result, in this embodiment, in the hour marker 12 where multiple recesses are formed, the hue angle of the light interfered with by the multilayer film 31 laminated on the hypotenuse D increases in proportion to the slope of the hypotenuse D, whereas in the dial body 11, the multilayer film 31 is laminated on a smooth surface 301, so the hue angle of the hour marker 12 is larger than the hue angle of the dial body 11. Therefore, the hue can be changed between the hour marker 12 on the dial 10 and the dial body 11.

[0023] In particular, it was suggested that when 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 is greater than 1:6, that is, when the length of V relative to H is greater than 1 / 6, the difference in hue angle Δh between the area where the recess is not formed and the area where the recess is formed becomes larger. This suggests that in this embodiment, by making the ratio of V to H greater than 1:6, the difference between the hue angle of the hour mark 12 where the recess 32 is formed and the hue angle of the dial body 11 where the recess is not formed can be increased, thereby increasing the hue change between the hour mark 12 and the dial body 11. Therefore, while ensuring the visibility of the hour mark 12, the uniformity between the hour mark 12 and the dial body 11 on the dial 10 can be increased, thus improving the design of the dial 10.

[0024] [Effects of the Embodiment] According to this embodiment, the following effects can be obtained. In this embodiment, a plurality of recesses 32 are formed on the surface 301 of the base material 30 at the hour mark 12. In a cross-sectional view of the base material 30 cut in the thickness direction, the plurality of recesses 32 are defined by a straight side L and a hypotenuse D that is inclined with respect to the straight side L and abuts against the straight side L at its end. As a result, at the hour mark 12, the hue angle of the light interfered with by the multilayer film 31 laminated on the hypotenuse D increases in proportion to the inclination of the hypotenuse D, whereas at the dial body 11, the multilayer film 31 is laminated on a smooth surface 301, so the hue angle of the hour mark 12 is larger than the hue angle of the dial body 11. Therefore, the hue can be changed between the hour mark 12 and the dial body 11 on the dial 10.

[0025] In this embodiment, in a cross-sectional view, the ratio of the length V of the hypotenuse D in the thickness direction of the substrate to the length H of the hypotenuse D in the direction perpendicular to the thickness direction is configured to be greater than 1:6. This makes it possible to increase the difference between the hue angle of the hour mark 12 where the recess 32 is formed and the hue angle of the dial body 11 where the recess is not formed. Therefore, the change in hue between the hour mark 12 and the dial body 11 can be greatly increased.

[0026] In this embodiment, the multilayer film 31 is made of Ta2O5, SiO2, TiO2, Al2O3, ZrO2, Nb2O5, HfO2, and Na5Al3F 14 The dial 10 may also be equipped with a color adjustment film 312 made of a material containing at least one of Na3AlF6, AlF3, MgF2, CaF2, BaF2, YF3, LaF3, CeF3, and NdF3. This allows for a wider range of tones to be expressed as the dial 10. Furthermore, since these inorganic oxides have high chemical stability, the stability and durability of the appearance of the dial 10 can be improved.

[0027] In this embodiment, the multilayer film 31 includes a color-absorbing film 311 formed using metal. This allows for a high-quality appearance as the dial 10.

[0028] In this embodiment, in a cross-sectional view, the straight side L is tilted to be symmetric with respect to the hypotenuse D with respect to the axis of symmetry A1 extending in the thickness direction of the substrate 30. Therefore, the color tone of light interfered with by the multilayer film 31 laminated on the straight side L can be changed in the same way as the light interfered with by the multilayer film 31 laminated on the hypotenuse D.

[0029] In this embodiment, multiple recesses 32 are formed on the surface 301 of the base material 30 of the hour mark 12, and the surface 301 of the dial body 11 is smooth. This ensures the visibility of the hour mark 12 while maintaining a high degree of uniformity between the hour mark 12 and the dial body 11 on the dial 10. As a result, the design of the dial 10 can be enhanced.

[0030] In this embodiment, the recess 32 is formed using one of the following methods: cutting, laser processing, chemical removal, polishing, and forging / casting. This allows the inclination of the hypotenuse D in the recess 32 to be arbitrarily changed.

[0031] [Second Embodiment] Next, a second embodiment of the present disclosure will be described with reference to Figures 8 to 10. The second embodiment differs from the first embodiment described above in that the dial body portion 11 is provided with a first region 111A and a second region 112A. In the second embodiment, the same or similar components as in the first embodiment are denoted by the same reference numerals, and their descriptions are omitted or simplified.

[0032] Figure 8 is a schematic front view showing the dial body 11. As shown in Figure 8, in this embodiment, the dial body 11A includes a first region 111A and a second region 112A that have different visible colors.

[0033] [First area] Figure 9 is a cross-sectional view showing the main part of the first region 111A, and Figure 10 is an enlarged cross-sectional view showing the main part of the first region 111A. Figures 9 and 10 are cross-sectional views of the base material 30A in the first region 111A cut in the thickness direction. As shown in Figures 9 and 10, the first region 111A is configured to include a substrate 30A and a multilayer film 31A, similar to the hour mark 12 of the first embodiment described above.

[0034] [recess] The recess 32A is defined in a cross-sectional view of the base material 30A cut in the thickness direction by a first side L1 and a second side D1 which is inclined with respect to the first side L1 and abuts against the first side L1 at its end. In this embodiment, the first side L1 and the second side D1 are curved. Furthermore, similar to the first embodiment described above, the recess 32A is formed such that a plurality of conical protrusions are formed on the surface 301A.

[0035] Furthermore, similar to the first embodiment described above, the recess 32A is formed such that the ratio of the length V2 of the second side D1 in the thickness direction of the base material 30A to the length H1 of the second side D1 in the direction perpendicular to the thickness direction of the base material 30A is greater than 1:6. In other words, the recess 32A is formed such that the ratio of V1 to H1 is greater than 1 / 6.

[0036] [Second area] The second region 112A is configured in the same way as the dial body portion 11 of the first embodiment described above. That is, no recesses are formed on the surface 301A of the base material 30A in the second region 112A.

[0037] [Effects of the second embodiment] According to this embodiment, the following effects can be obtained. In this embodiment, the first side L1 and the second side D1 defining the recess 32A are curved. This means that the sides defining the recess 32A are not limited to straight lines, thus increasing the degree of freedom in processing for forming the recess 32A.

[0038] [Differentiation] This disclosure is not limited to the embodiments described above, and any modifications, improvements, etc., to the extent that they can achieve the purpose of this disclosure are included.

[0039] Figure 11 is a perspective view showing the main part of the first region 111B of a modified example. As shown in Figure 11, in the modified first region 111B, a first surface 302B and a second surface 303B are formed on the surface 301B of the base material 30B. The first surface 302B is defined in a rectangular shape by a first side L2 and a third side P2 that is perpendicular to the first side L2 and the second side D2. Similarly, the second surface 303B is defined in a rectangular shape by the second side D2 and the third side P2. Furthermore, the angle of the second surface 303B with respect to the first surface 302B is kept constant. Furthermore, the recess 32B is defined by the first surface 302B and the second surface 303B as defined above. That is, the surface 301B of the base material 30B is formed in the shape of a ridge. This configuration makes it easy to process the surface 301B of the base material 30B. The inclination of the second surface 303B relative to the first surface 302B can be set arbitrarily.

[0040] In the embodiments described above, the watch component of the present disclosure was configured as a dial 10, but is not limited thereto. For example, the watch component of the present disclosure may be configured as any one of a case, a dial ring, a glass bezel, a movement, hands, and a rotor.

[0041] [Summary of this disclosure] The watch component of the present disclosure comprises a substrate having a first region on which a plurality of recesses are formed on its surface and a second region on which the surface is smooth, and a multilayer film covering at least a portion of the substrate, wherein, in a cross-sectional view obtained by cutting the substrate in the thickness direction, the plurality of 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 its end, and the hue angle of the first region is greater than the hue angle of the second region. In this disclosure, a plurality of recesses are formed on the surface of a first region of the substrate. In a cross-sectional view of the substrate cut in the thickness direction, the plurality of recesses are defined by a first edge and a second edge that is inclined with respect to the first edge and abuts the first edge at its end. As a result, in the first region, the hue angle of light interfered with by the multilayer film laminated on the second edge increases in proportion to the inclination of the second edge, whereas in the second region, since the multilayer film is laminated on a smooth surface, the hue angle of the first region is larger than that of the second region. Therefore, the hue can be changed between the first region and the second region of the watch component.

[0042] In the watch component of the present disclosure, in the cross-sectional view, the ratio of the length of the second side with respect to the thickness direction of the substrate to the length of the second side with respect to the direction perpendicular to the thickness direction may be greater than 1:6. This allows for a larger difference between the hue angles of the first and second regions, thereby increasing the hue change between the first and second regions.

[0043] In the watch component of this disclosure, the multilayer film is Ta2O5, SiO2, TiO2, Al2O3, ZrO2, Nb2O5, HfO2, Na5Al3F 14 The device may also include a color-adjusting film made of a material containing at least one of the following: Na3AlF6, AlF3, MgF2, CaF2, BaF2, YF3, LaF3, CeF3, and NdF3. This allows for a wider range of colors to be expressed in watch components. Furthermore, because these inorganic oxides have high chemical stability, they can improve the appearance stability and durability of watch components.

[0044] In the watch component of this disclosure, the multilayer film may include a color-absorbing film formed using a metal. This allows for a high-quality appearance when used as a watch component.

[0045] In the watch component of this disclosure, the first side may be inclined in a cross-sectional view such that it is symmetrical with respect to the second side with respect to an axis of symmetry extending in the thickness direction of the substrate. As a result, the first side is tilted to be symmetrical with the second side, so the color tone of the light interfered with by the multilayer film stacked on the first side can be changed in the same way as the light interfered with by the multilayer film stacked on the second side.

[0046] In the watch component of this disclosure, the recess is defined by the first side and a third side perpendicular to the first and second sides, and a second side defined by the second and third sides, wherein the angle of the second side with respect to the first side is constant. As a result, the surface of the substrate is formed in a ridged shape, which makes it easier to process the surface of the substrate.

[0047] In the watch component of this disclosure, the watch component may be configured as a dial, the first region may be configured as hour markers, and the second region may be configured as the dial body. This ensures the visibility of the hour markers while also increasing the consistency between the hour markers and the main dial, thereby enhancing the overall design of the dial.

[0048] The clock according to this disclosure is characterized by comprising the aforementioned clock components.

[0049] A method for manufacturing a watch component according to the present disclosure comprises a substrate having a first region on which a plurality of recesses are formed on its surface and a second region on which the surface is smooth, and a multilayer film covering at least a part of the substrate, the method comprising the steps of forming a plurality of recesses on the surface of the first region of the substrate, and laminating the multilayer film on at least a part of the surface of the substrate, wherein, in a cross-sectional view obtained by cutting the substrate in the thickness direction, the plurality of 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 its end. As a result, in the first region, the hue angle of light interfered with by the multilayer film stacked on the second edge increases in proportion to the slope of the second edge, whereas in the second region, since the multilayer film is stacked on a smooth surface, the hue angle of the first region becomes larger than that of the second region. Therefore, it is possible to change the hue between the first and second regions in a watch component.

[0050] In the method for manufacturing watch components according to the present disclosure, the recess may be formed using one of the following methods: cutting, laser processing, chemical removal, polishing, and forging / casting. This allows the inclination of the second edge in the recess to be changed arbitrarily.

[0051] The watch according to this disclosure is characterized by being constructed using watch components manufactured by the method for manufacturing watch components described above. [Explanation of symbols]

[0052] 1...Watch, 2...Case, 3...Second hand, 4...Minute hand, 5...Hour hand, 7...Crown, 8...Button A, 9...Button B, 10...Dial (watch part), 11...Main body of dial, 12...Hour markers, 30,30A...Base material, 31...Multilayer film, 32,32A...Recess, 301...Surface, 311...Color absorption film, 312...Color adjustment film, 3121...Inorganic layer, D...Hypotenuse (second side), L...Straight side (first side).

Claims

1. A substrate having a surface, The substrate comprises a multilayer film covering at least a portion thereof, The substrate has a first region in which a plurality of recesses are formed on its surface, and a second region in which the surface is smooth and is located at a different position from the first region. In a cross-sectional view obtained by cutting the substrate in the thickness direction, the plurality of recesses are defined by a first side and a second side that is inclined with respect to the first side and abuts against the first side at its end. The hue angle of the first region is greater than the hue angle of the second region. A watch component characterized by the following features.

2. In the watch component described in claim 1, In the cross-sectional view, the ratio of the length of the second side in the thickness direction of the substrate to the length of the second side in the direction perpendicular to the thickness direction is greater than 1:

6. A watch component characterized by the following features.

3. In the watch component according to claim 1 or claim 2, The multilayer film is Ta ２ O ５ 、SiO ２ 、TiO ２ 、Al ２ O ３ 、ZrO ２ 、Nb ２ O ５ 、HfO ２ 、Na ５ Al ３ F １４ 、Na ３ AlF ６ 、AlF ３ 、MgF ２ 、CaF ２ 、BaF ２ 、YF ３ 、LaF ３ 、CeF ３ 、and at least one of NdF ３ and includes a color adjustment film composed of a material containing at least one of them A watch component characterized by the following features.

4. In the watch component according to any one of claims 1 to 3, The multilayer film comprises a color-absorbing film formed using a metal. A watch component characterized by the following features.

5. In the watch component according to any one of claims 1 to 4, In the cross-sectional view, the first side is inclined to be symmetric with respect to the second side with respect to the axis of symmetry extending in the thickness direction of the substrate. A watch component characterized by the following features.

6. In the watch component according to any one of claims 1 to 4, The recess is defined by a first surface defined by the first side and a third side perpendicular to the first and second sides, and a second surface defined by the second side and the third side. The angle between the second surface and the first surface is assumed to be constant. A watch component characterized by the following features.

7. In a watch component according to any one of claims 1 to 6, The aforementioned watch component is configured as a dial, The first region is configured as an hour mark, The second region is configured as the main body of the dial. A watch component characterized by the following features.

8. The watch component comprises the watch component described in any one of claims 1 to 7. A watch characterized by its features.

9. A method for manufacturing a watch component, comprising: a substrate having a first region on which a plurality of recesses are formed on its surface and a second region whose surface is smooth and located at a position different from that of the first region; and a multilayer film covering at least a part of the substrate, A step of forming a plurality of recesses on the surface of the first region of the substrate, The process includes a step of laminating the multilayer film onto at least a portion of the surface of the substrate, In a cross-sectional view obtained by cutting the substrate in the thickness direction, the plurality of recesses are defined by a first side and a second side that is inclined with respect to the first side and abuts against the first side at its end. The recess is formed such that the hue angle of the first region is greater than the hue angle of the second region. A method for manufacturing watch components, characterized by the following features.

10. In the method for manufacturing watch components according to claim 9, The recess is formed using one of the following methods: cutting, laser processing, chemical removal, polishing, and forging / casting. A method for manufacturing watch components, characterized by the following features.

Images