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 and a multilayer film at least partially covering the base material. The base material has multiple recesses formed on a surface thereof on a side opposite the multilayer film. 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.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 such as 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 and a multilayer film that covers at least a part of the base material. A plurality of concave portions are formed on the surface of the base material that faces the multilayer film. 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 portion.

[0006] The watch of this disclosure is a watch constructed using the aforementioned watch components, characterized in that one of the following is constructed using the aforementioned watch components: a dial ring, a glass bezel, a movement, a dial, hands, hour markers, and a rotor.

[0007] The present disclosure is a method for manufacturing a watch component, comprising a base material and a multilayer film covering at least a portion of the base material, comprising the steps of forming a plurality of recesses on the surface of the base material and laminating the multilayer film on at least a portion of the surface of the base material on which the plurality of recesses are formed, wherein, in a cross-sectional view obtained by cutting the base material 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 schematic front view showing the dial of the first embodiment. [Figure 3] A cross-sectional view showing the main part of the first region of the dial of the first embodiment. [Figure 4] An enlarged cross-sectional view showing the main part of the first region of the dial of the first embodiment. [Figure 5] A perspective view showing the main part of the first region of the dial of the first embodiment. [Figure 6] A cross-sectional view showing the main part of the first region of the dial of the first embodiment. [Figure 7] An enlarged cross-sectional view showing the main part of the second region of the dial of the first embodiment. [Figure 8] An enlarged perspective view showing the main part of the second region of the dial of the first embodiment. [Figure 9] An enlarged perspective view showing the main part of the third region of the dial of the first embodiment. [Figure 10]A diagram showing the relationship between the ratio of the length V of the hypotenuse in the thickness direction of the base material and the length H of the hypotenuse in the direction orthogonal to the thickness direction of the base material, and the hue angle. [Figure 11] Cross-sectional view showing the main part of the first region of the second embodiment. [Figure 12] Enlarged cross-sectional view showing the main part of the first region of the dial plate of the second embodiment. [Figure 13] Perspective view showing the main part of the first region of the modified example. [Figure 14] Perspective view showing the main part of the first region of another modified example.

Mode for Carrying Out the Invention

[0010] [First Embodiment] Hereinafter, the clock 1 of the embodiment of the present disclosure will be described based on the drawings. FIG. 1 is a front view showing the clock 1. In the present embodiment, the clock 1 is configured as a wristwatch worn on the user's wrist. As shown in FIG. 1, the clock 1 includes a metal case 10. Inside the case 10, there are a disc-shaped dial plate 2, a second hand 3, a minute hand 4, an hour hand 5, a dragon head 6, an A button 7, and a B button 8. Further, a band 9 is attached to the case 10. The case 10 includes a case body 11 and a lug 12. The case body 11 houses the above-described dial plate 2, second hand 3, minute hand 4, hour hand 5, etc. inside. The lugs 12 are provided at the 6 o'clock direction and the 12 o'clock direction of the case body 11, respectively. And a band 9 is attached to each lug 12 with a spring bar or the like not shown in the figure. Note that the dial plate 2 is an example of a component for a clock of the present disclosure.

[0011] [Dial Plate 2] FIG. 2 is a front view showing an outline of the dial plate 2. As shown in FIG. 2, in the present embodiment, the dial plate 2 includes a first region 21, a second region 22, and a third region 23 having different visible colors.

[0012] [First Region] FIG. 3 is a cross-sectional view showing the main part of the first region 21, FIG. 4 is an enlarged cross-sectional view showing the main part of the first region 21, and FIG. 5 is an enlarged perspective view showing the main part of the first region 21. Note that FIGS. 3 and 4 are cross-sectional views obtained by cutting the base material 30 in the letter plate 2 in the thickness direction. As shown in FIGS. 3 to 5, the first region 21 of the letter plate 2 is configured to include a base material 30 and a multilayer film 31. In the present embodiment, the base material 30 is entirely covered with the multilayer film 31. That is, the multilayer film 31 is laminated so as to cover the entire surface 301 of the base material 30. Note that the first region 21 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 base material 30.

[0013] [Base material] The material of the base material 30 is composed of a metal such as iron, brass, or aluminum, a resin, or glass. When the base material 30 is made of a resin, the resin may be a non-light-transmitting resin that does not transmit light, or a light-transmitting resin that transmits light. In the present embodiment, a plurality of first recesses 32 are formed on the surface 301 of the base material 30 in the first region 21.

[0014] [First recess] In a cross-sectional view obtained by cutting the base material 30 in the thickness direction, the first recess 32 is defined by a first straight side L1 and a first inclined side D1 that is inclined with respect to the first straight side L1 and abuts on the first straight side L1 at an end. The first straight side L1 is inclined so as to be line-symmetric with the first inclined side D1 with respect to a symmetry axis A1 extending in the thickness direction of the base material 30. More specifically, in the present embodiment, as shown in FIG. 5, the first recess 32 is formed such that a plurality of conical protrusions are formed on the surface 301. The angle of the first inclined side D1 with respect to the direction orthogonal to the thickness direction of the base material 30 is θ1. Note that the first straight side L1 is an example of the first side of the present disclosure, and the first inclined side D1 is an example of the second side of the present disclosure.

[0015] In this embodiment, the first recess 32 is formed such that the ratio of the length V1 of the first hypotenuse D1 in the thickness direction of the base material 30 to the length H1 of the first hypotenuse D1 in the direction perpendicular to the thickness direction of the base material 30 is greater than 1:6. That is, the first recess 32 is formed such that the ratio of V1 to H1 is greater than 1 / 6. In other words, when the length V1 of the first hypotenuse D1 in the thickness direction of the base material 30 is set to 1, the first recess 32 is formed such that the length H1 of the first hypotenuse D1 in the direction perpendicular to the thickness direction of the base material 30 is less than 6, that is, H1 is less than 6 times V1.

[0016] [Multilayer film] The multilayer film 31 comprises a color absorption film 311 and a color adjustment film 312, and is laminated on the surface 301 side of the substrate 30. The color-absorbing film 311 is laminated on the surface 301 side of the substrate 30 and is formed using a metal. Preferably, the metal constituting the color-absorbing film 311 is Ag, Pt, Au, Cu, Al, Cr, Sn, Fe, Ti, or alloys thereof. 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 2. 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.

[0017] 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 2. In addition, since these inorganic materials have high chemical stability, the stability and durability of the appearance of the dial 2 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.

[0018] 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.

[0019] [Second area 22] Figure 6 is a cross-sectional view showing the main part of the second region 22, Figure 7 is an enlarged cross-sectional view showing the main part of the second region 22, and Figure 8 is an enlarged perspective view showing the main part of the second region 22. Figures 6 and 7 are cross-sectional views of the base material 30 of the dial 2 cut in the thickness direction. As shown in Figures 6 to 8, the second region 22 of the dial 2 is composed of the aforementioned base material 30 and multilayer film 31. In this embodiment, a plurality of second recesses 33 are formed on the surface 301 of the substrate 30 in the second region 22.

[0020] [Second recess] The second recess 33 is defined in a cross-sectional view of the base material 30 cut in the thickness direction by a second straight edge L2 and a second hypotenuse D2 that is inclined with respect to the second straight edge L2 and abuts against the second straight edge L2 at its end. Similar to the first recess 32 described above, the second straight edge L2 is inclined to be symmetric with respect to the second hypotenuse D2 with respect to the axis of symmetry A1 extending in the thickness direction of the base material 30. More specifically, in this embodiment, the second recess 33 is formed such that a plurality of conical protrusions are formed on the surface 301, as shown in Figure 8. Furthermore, the angle of the second hypotenuse D2 with respect to the direction perpendicular to the thickness direction of the base material 30 is set to θ2. The second straight edge L2 is an example of the first edge of this disclosure, and the second hypotenuse D2 is an example of the second edge of this disclosure.

[0021] Furthermore, similar to the first recess 32 described above, the second recess 33 is formed such that the ratio of the length V2 of the second hypotenuse D2 in the thickness direction of the base material 30 to the length H2 of the second hypotenuse D2 in the direction perpendicular to the thickness direction of the base material 30 is greater than 1:6. In other words, the second recess 33 is formed such that the ratio of V2 to H2 is greater than 1 / 6. In other words, when the length V2 of the second hypotenuse D2 in the thickness direction of the base material 30 is set to 1, the second recess 33 is formed such that the length H2 of the second hypotenuse D2 in the direction perpendicular to the thickness direction of the base material 30 is less than 6, that is, H2 is less than 6 times V2.

[0022] In this embodiment, the first recess 32 and the second recess 33 are formed such that the angle θ1 of the first hypotenuse D1 in the first recess 32 is greater than the angle θ2 of the second hypotenuse D2 in the second recess 33. In other words, the first recess 32 and the second recess 33 are formed such that the ratio of V1 to H1 in the first recess 32 is greater than the ratio of V2 to H2 in the second recess 33. For example, the first recess 32 and the second recess 33 are formed such that the ratio of V1 to H1 in the first recess 32 is 1:3, and the ratio of V2 to H2 in the second recess 33 is 1:4.

[0023] [Third Area 23] Figure 9 is an enlarged perspective view showing the main part of the third region 23. As shown in Figure 9, multiple conical protrusions are formed on the surface of the substrate 30 in the third region 23, forming a third recess 34. The depth of the recesses 32, 33, and 34 is not particularly limited, but for example, the depth of the recesses 32, 33, and 34 is about several tens of micrometers. In this embodiment, the surface 301 of the base material 30 is smooth in areas of the dial 2 other than the first area 21, the second area 22, and the third area. In this embodiment, the statement that the surface 301 of the base material 30 on the dial 2 is smooth is not limited to the surface 301 being perfectly smooth, but includes, for example, a state in which the surface 301 has irregularities of about 5 μm or about 10 μm, and indicates a state in which the aforementioned recesses 32, 33, and 34 are not formed.

[0024] [Method of manufacturing a dial] Next, we will explain the manufacturing method of the dial 2. First, multiple first recesses 32 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 32 are formed on the surface 301 of the base material 30 using processes such as cutting, laser processing, chemical removal, polishing, forging, and casting. In this process, the first recesses 32 are formed such that the ratio of the length V1 of the first hypotenuse D1 in the thickness direction of the base material 30 to the length H1 of the first hypotenuse D1 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.

[0025] Next, multiple second recesses 33 are formed on the surface 301 of the base material 30 in the second region 22 of the dial 2. For example, the first recess 32 is formed on the surface 301 of the base material 30 using processes such as cutting, laser processing, chemical removal, polishing, forging, and casting. In this process, the second recess 33 is formed such that the ratio of the length V2 of the second hypotenuse D2 in the thickness direction of the base material 30 to the length H2 of the second hypotenuse D2 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. Then, similarly to the above, multiple third recesses 34 are formed on the surface 301 of the base material 30 in the third region 23 of the dial 2. The processing method for forming the first recess 32, the second recess 33, and the third recess 34 is not specified.

[0026] In this embodiment, as described above, the first recess 32 and the second recess 33 are formed such that the angle θ1 of the first hypotenuse D1 in the first recess 32 is greater than the angle θ2 of the second hypotenuse D2 in the second recess 33. In other words, the first recess 32 and the second recess 33 are formed such that the ratio of V1 to H1 in the first recess 32 is greater than the ratio of V2 to H2 in the second recess 33.

[0027] Then, a multilayer film 31 is laminated onto the surface 301 of the substrate 30 in the first region 21, the second region 22, and the third region 23. 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. Subsequently, 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 2 to be manufactured. Furthermore, by using the dial 2 manufactured using this method in the watch 1, the watch 1 can be manufactured. In this embodiment, the inclination of the hypotenuses D1 and D2 in the recesses 32, 33, and 34 can be arbitrarily changed by forming the recesses 32, 33, and 34 using processes such as cutting, laser processing, chemical removal, polishing, forging, and casting.

[0028] Figure 10 shows the relationship between the ratio of the length of the hypotenuse in the thickness direction V of the substrate and the length of the hypotenuse in the direction perpendicular to the thickness direction H of the substrate, and the hue angle difference. In Figure 10, 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 V to the length of the hypotenuse in the direction perpendicular to the thickness direction H was 1:1 to 1:10, and a multilayer film was laminated on the surface of the substrate and the hue angle was measured. 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* value and b* value in the Lab display system specified by the CIE (Commission Internationale d'Eclairage; International Commission on Illumination).

[0029] As shown in Figure 10, 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. This suggests that, in this embodiment, the hue of the dial 2 can be changed by changing the inclination of the hypotenuses D1 and D2.

[0030] 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 V1,V2 to H1,H2 greater than 1:6, the difference between the hue angle of the areas where recesses 32,33,34 are formed and the hue angle of the areas where recesses 32,33 are not formed can be increased, thereby increasing the hue change between the areas where recesses 32,33 are formed and the areas where recesses are not formed.

[0031] Furthermore, as shown in Figure 10, it was suggested that the hue angle 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 (H) increases. As described above, in this embodiment, the first recess 32 and the second recess 33 are formed such that the ratio of V1 to H1 in the first recess 32 is greater than the ratio of V2 to H2 in the second recess 33. That is, the first recess 32 and the second recess 33 are formed such that the angle θ1 of the first hypotenuse D1 in the first recess 32 is greater than the angle θ2 of the second hypotenuse D2 in the second recess 33. Therefore, the hue angle of the first region 21 can be made larger than the hue angle of the second region 22. In other words, the hue can be changed between the first region 21 and the second region 22, and multiple hues can be applied to the dial 2.

[0032] [Effects of the First Embodiment] According to this embodiment, the following effects can be obtained. In this embodiment, a plurality of recesses 32 and 33 are formed on the surface 301 of the substrate 30 facing the multilayer film 31. When the substrate 30 is cut in the thickness direction, the plurality of recesses 32 and 33 are defined by straight sides L1 and L2 and slanted sides D1 and D2 that are inclined with respect to the straight sides L1 and L2 and abut against the straight sides L1 and L2 at their ends. As a result, the color tone of light interfered with by the multilayer film 31 laminated on the slanted sides D1 and D2 changes depending on the inclination of the slanted sides D1 and D2, so the hue of the dial 2 can be changed by changing the inclination of the slanted sides D1 and D2.

[0033] In this embodiment, the angle θ1 of the inclination of the first hypotenuse D1 of the first recess 32 with respect to the direction perpendicular to the thickness direction of the base material 30 is greater than the angle θ2 of the inclination of the second hypotenuse D2 of the second recess 33. Therefore, the hue can be changed between the first region 21 and the second region 22. As a result, multiple hues can be applied to the dial 2.

[0034] In this embodiment, by making the angle θ1 of the inclination of the first hypotenuse D1 of the first recess 32 with respect to the direction perpendicular to the thickness direction of the substrate 30 larger than the angle θ2 of the inclination of the hypotenuse D2 of the second recess 33, the hue angle of the first region 21 can be made larger than the hue angle of the second region 22.

[0035] In this embodiment, in a cross-sectional view, the ratio of the lengths V1 and V2 of the hypotenuses D1 and D2 in the thickness direction of the substrate to the lengths H1 and H2 of the hypotenuses D1 and D2 in the direction perpendicular to the thickness direction is configured to be greater than 1:6. This makes it possible to increase the difference in hue angles between the areas where recesses 32 and 33 are formed and the areas where recesses 32 and 33 are not formed, thereby increasing the change in hue between the areas where recesses 32 and 33 are formed and the areas where recesses are not formed.

[0036] In this embodiment, the multilayer film 31 is made of Ta2O5, SiO2, TiO2, Al2O3, ZrO2, Nb2O5, HfO2, and Na5Al3F 14 The dial 2 may also be equipped with a color adjustment film 312 made of a material containing at least one selected from the group consisting 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 2. Furthermore, since these inorganic materials have high chemical stability, the stability and durability of the appearance of the dial 2 can be improved.

[0037] 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 2.

[0038] In this embodiment, in a cross-sectional view, the straight sides L1 and L2 are tilted so as to be symmetrical with the hypotenuses D1 and D2 with respect to the axis of symmetry A1 extending in the thickness direction of the substrate 30. As a result, since the straight sides L1 and L2 are tilted so as to be symmetrical with the hypotenuses D1 and D2, the color tone of the light interfered with by the multilayer film 31 laminated on the straight sides L1 and L2 can be changed in the same way as the light interfered with by the multilayer film 31 laminated on the hypotenuses D1 and D2.

[0039] In this embodiment, the recesses 32 and 33 are formed using one of the following methods: cutting, laser processing, or chemical removal. This allows the inclination of the hypotenuses D1 and D2 in the recesses 32 and 33 to be arbitrarily changed.

[0040] [Second Embodiment] Next, a second embodiment of the present disclosure will be described with reference to Figures 11 and 12. The second embodiment differs from the first embodiment described above in that the first recess 32A of the first region 21A is defined by the curved first side L3 and second side D3. 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.

[0041] [First area] Figure 11 is a cross-sectional view showing the main part of the first region 21A, and Figure 12 is an enlarged cross-sectional view showing the main part of the first region 21A. Figures 11 and 12 are cross-sectional views of the base material 30A in the first region 21A cut in the thickness direction. As shown in Figures 11 and 12, the first region 21A is configured to include a substrate 30A and a multilayer film 31A, similar to the first embodiment described above.

[0042] [First recess] The first recess 32A is defined in a cross-sectional view of the base material 30A cut in the thickness direction by a first side L3 and a second side D3 which is inclined with respect to the first side L3 and abuts against the first side L3 at its end. In this embodiment, the first side L3 and the second side D3 are curved. Furthermore, similar to the first embodiment described above, the first recess 32A is formed such that a plurality of conical protrusions are formed on the surface 301A. Although not shown in the diagram, in this embodiment, the first and second edges defining the second recess in the second region are also curved.

[0043] Furthermore, similar to the first embodiment described above, the first recess 32A is formed such that the ratio of the length V3 of the second side D3 in the thickness direction of the base material 30A to the length H3 of the second side D3 in the direction perpendicular to the thickness direction of the base material 30A is greater than 1:6. In other words, the first recess 32A is formed such that the ratio of V3 to H3 is greater than 1 / 6. 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 set to θ3. The first recess 32A and the second recess are formed such that this angle θ3 is greater than the angle θ formed 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.

[0044] [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 defining the first recess 32A are curved. As a result, the sides defining the first recess 32A are not limited to straight lines, which increases the degree of freedom in processing for forming the first recess 32A.

[0045] [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.

[0046] Figure 13 is a perspective view showing the main part of the first region 21B of a modified example. As shown in Figure 13, in the modified first region 21B, 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 L4 and a third side P4 that is perpendicular to the first side L4 and the second side D4. Similarly, the second surface 303B is defined in a rectangular shape by a second side D4 and a third side P4. Furthermore, the angle of the second surface 303B with respect to the first surface 302B is kept constant. The first 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.

[0047] Figure 14 is a perspective view showing the main part of the first region 21C of another modified example. As shown in Figure 14, in the first region 21C, the first recess 32C may be formed by the formation of square pyramidal or cubic protrusions on the surface 301C of the substrate 30C.

[0048] In the embodiments described above, the watch component of the present disclosure was configured as a dial 2, 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, hour markers, and a rotor.

[0049] In the embodiment described above, the first recess 32 and the second recess 33 were formed such that the angle θ1 of the first hypotenuse D1 in the first recess 32 of the first region 21 was greater than the angle θ2 of the second hypotenuse D2 in the second recess 33 of the second region 22, but the embodiment is not limited to this. For example, the first recess and the second recess may be formed such that the angle of the second side in the second recess of the second region is greater than the angle of the first side in the first recess of the first region. Furthermore, within the case body, a first region and a second region may be formed where the angles of the second side of the recess are different. Furthermore, the recess may be formed such that the angle of the second side in the recess gradually changes. This configuration allows for a gradient-like change in hue.

[0050] [Summary of this disclosure] The watch component of the present disclosure comprises a base material and a multilayer film covering at least a portion of the base material, wherein a plurality of recesses are formed on the surface of the base material facing the multilayer film, and in a cross-sectional view obtained by cutting the base material 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. In this disclosure, a plurality of recesses are formed on the surface of the substrate facing the multilayer film. 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, the color tone of light interfered with by the multilayer film laminated on the second edge changes depending on the inclination of the second edge, and the hue of the watch component can be changed by changing the inclination of the second edge.

[0051] In the watch component of the present disclosure, the substrate comprises a first region and a second region in which the recess is formed, and in the cross-sectional view, the angle of inclination of the hypotenuse of the recess in the first region with respect to the direction perpendicular to the thickness direction of the substrate may be greater than the angle of inclination of the hypotenuse of the recess in the second region with respect to the direction perpendicular to the thickness direction of the substrate. As a result, the angle of inclination of the hypotenuse of the recess in the first region with respect to the direction perpendicular to the thickness direction of the substrate is greater than the angle of inclination of the hypotenuse of the recess in the second region, allowing for a change in hue between the first and second regions. Therefore, multiple hues can be applied to watch components.

[0052] In the watch component of this disclosure, the hue angle of the first region may be greater than the hue angle of the second region. This makes the hue angle of the first region larger than the hue angle of the second region by making the angle of inclination of the hypotenuse of the recess in the first region, with respect to the direction perpendicular to the thickness direction of the substrate, larger than the angle of inclination of the hypotenuse of the recess in the second region.

[0053] In the watch component of the present disclosure, in the cross-sectional view, the ratio of the length of the hypotenuse with respect to the thickness direction of the substrate to the length of the hypotenuse with respect to the direction perpendicular to the thickness direction may be greater than 1:6. This allows for a larger difference in hue angle between the areas where the recess is formed and the areas where the recess is not formed, thereby increasing the hue change between the areas where the recess is formed and the areas where the recess is not formed.

[0054] 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 materials have high chemical stability, they can improve the appearance stability and durability of watch components.

[0055] 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.

[0056] In the watch component of this disclosure, the straight edge may be inclined in a cross-sectional view such that it is symmetrical with the hypotenuse with respect to an axis of symmetry extending in the thickness direction of the base material. As a result, the straight edges are tilted to be symmetrical with the hypotenuse, so the color tone of the light interfered with by the multilayer film stacked on the straight edges can be changed in the same way as the light interfered with by the multilayer film stacked on the hypotenuse.

[0057] 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.

[0058] The watch of this disclosure is a watch constructed using the aforementioned watch components, characterized in that one of the following is constructed using the aforementioned watch components: a dial ring, a glass bezel, a movement, a dial, hands, hour markers, and a rotor.

[0059] The present disclosure is a method for manufacturing a watch component, comprising a base material and a multilayer film covering at least a portion of the base material, the method comprising the steps of forming a plurality of recesses on the surface of the base material and laminating the multilayer film on at least a portion of the surface of the base material on which the plurality of recesses are formed, wherein, in a cross-sectional view obtained by cutting the base material in the thickness direction, the plurality of recesses are defined by a straight edge and a slanted edge that is inclined with respect to the straight edge and abuts against the straight edge at its end. As a result, the color tone of light interfered with by the multilayer film stacked on the hypotenuse changes depending on the slope of the hypotenuse, and by changing the slope of the hypotenuse, the hue of the watch components can be changed.

[0060] In the method for manufacturing watch components according to the present disclosure, the substrate comprises a first region and a second region in which the recess is formed, and the recess may be formed such that the angle of the hypotenuse with respect to the straight side in the recess of the first region is greater than the angle of the hypotenuse with respect to the straight side in the recess of the second region. As a result, the angle of inclination of the hypotenuse of the recess in the first region with respect to the direction perpendicular to the thickness direction of the substrate is greater than the angle of inclination of the hypotenuse of the recess in the second region, allowing for a change in hue between the first and second regions. Therefore, multiple hues can be applied to watch components.

[0061] 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 hypotenuse in the recess to be changed arbitrarily.

[0062] 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]

[0063] 1...Watch, 2...Dial (watch part), 3...Second hand, 4...Minute hand, 5...Hour hand, 6...Crown, 7...A button, 8...B button, 9...Band, 10...Case, 11,11A...Case body (first region), 12...Lug (second region), 30,30A...Substrate, 31...Multilayer film, 32,32A...First recess, 33...Second recess, 301,301A...Surface, 311...Color absorption film, 312...Color adjustment film, 3121...Inorganic layer, D1...First hypotenuse (second side), D2...Second hypotenuse (second side), L1...First straight side (first side), L2...Second straight side (first side), L3...First straight side.

Claims

1. Substrate and The substrate comprises a multilayer film covering at least a portion thereof, Multiple recesses are formed on the surface of the substrate facing the multilayer film. 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 substrate comprises a first region and a second region in which the recess is formed, In the cross-sectional view, the angle of inclination of the second side of the recess in the first region with respect to the direction perpendicular to the thickness direction of the substrate is greater than the angle of inclination of the second side of the recess in the second region with respect to the direction perpendicular to the thickness direction of the substrate. 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 aforementioned 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 5, 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. A clock comprising clock components as described in any one of claims 1 to 6, The dial ring, glass bezel, movement, dial face, hands, hour markers, and rotor are constructed using the aforementioned watch components. A watch characterized by its features.

8. A method for manufacturing a watch component comprising a substrate and a multilayer film covering at least a portion of the substrate, A step of forming a plurality of recesses on the surface of the substrate, The process includes laminating the multilayer film onto at least a portion of the surface of the substrate on which a plurality of recesses are formed, 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 substrate comprises a first region and a second region in which the recess is formed, The recess is formed such that the angle of the second side relative to the first side in the recess of the first region is greater than the angle of the second side relative to the first side in the recess of the second region, and 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.

9. In the method for manufacturing watch components according to claim 8, 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.

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