Timepiece component and timepiece

Abstract

The invention provides a timepiece component and a timepiece, which can express hue with high color saturation. The timepiece component is characterized by comprising: a base material; and a multilayer film covering at least a portion of the base material, the multilayer film having a color adjustment film formed by dry plating and comprising an oxide layer or a fluoride layer, the color adjustment film having: a first color adjustment film having a refractive index of 2.0 or more; a second color adjustment film having a refractive index of 1.5 or more and less than 2.0; and a third color adjustment film having a refractive index of less than 1.5.

Description

Technical Field

[0001] The present invention relates to a timepiece component and a timepiece. Background Art

[0002] Patent Document 1 discloses a timepiece component in which a color-adjusting film for adjusting the color tone is laminated on a substrate as a metallic glossy portion.

[0003] In the timepiece component of Patent Document 1, the color tone of the appearance is adjusted by using the metallic gloss portion and the color-adjusting film, so that the aesthetics can be improved even without using a precious metal as the main material.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2018-124267

[0005] In Patent Document 1, although it is possible to have aesthetic qualities similar to those of precious metals, there is a problem in that it is difficult to express a color tone with high color saturation. Summary of the invention

[0006] The timepiece component disclosed in the present invention is characterized in that the timepiece component comprises: a substrate; and a multilayer film, which covers at least a portion of the substrate, the multilayer film having a color adjustment film, the color adjustment film being composed of an oxide layer or a fluoride layer and formed by dry plating, the color adjustment film comprising: a first color adjustment film having a refractive index of greater than 2.0; a second color adjustment film having a refractive index of greater than 1.5 and less than 2.0; and a third color adjustment film having a refractive index of less than 1.5.

[0007] The timepiece of the present invention is characterized by being constituted using the timepiece component described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a front view showing a timepiece according to one embodiment.

[0009] Figure 2 It is a cross-sectional view showing a main part of the dial of the embodiment.

[0010] Description of symbols

[0011] 1: clock; 2: case; 3: second hand; 4: minute hand; 5: hour hand; 6: hour mark; 7: crown; 8: button A; 9: button B; 10: dial (clock component); 11: substrate; 12: multilayer film; 111: surface; 121: color adjustment film; 122: color absorption film; 123: protective film; 1211: first color adjustment film; 1212: second color adjustment film; 1213: third color adjustment film. DETAILED DESCRIPTION

[0012] [Implementation Method]

[0013] Hereinafter, a timepiece 1 according to an embodiment of the present disclosure will be described with reference to the drawings.

[0014] Figure 1 1 is a front view showing the timepiece 1. In the present embodiment, the timepiece 1 is configured as a wristwatch to be worn on a user's wrist.

[0015] like Figure 1 As shown, the timepiece 1 includes a metal case 2. The case 2 includes a disk-shaped dial 10, a second hand 3, a minute hand 4, an hour hand 5, a crown 7, an A button 8, and a B button 9. The dial 10 is an example of a timepiece component of the present disclosure.

[0016] The dial 10 is provided with hour marks 6 for indicating the time.

[0017] [dial]

[0018] Figure 2 It is a cross-sectional view showing a main part of the dial 10 .

[0019] As shown in the figure, the dial 10 has a substrate 11 and a multilayer film 12 .

[0020] In this embodiment, the entire substrate 11 is covered with the multilayer film 12. The dial 10 is not limited to the above structure, and for example, the multilayer film 12 may be laminated so as to cover a portion of the surface 111 of the substrate 11.

[0021] [Base material]

[0022] The material of the base material 11 is composed of metal such as iron, brass, and aluminum, resin, etc. When the base material 11 is composed of resin, the resin may be a non-translucent resin that does not transmit light, or a translucent resin that transmits light.

[0023] [Multilayer film]

[0024] The multilayer film 12 includes a color adjustment film 121 , a color absorption film 122 , and a protective film 123 , and is laminated on the surface 111 of the substrate 11 .

[0025] [Color adjustment film]

[0026] The color adjustment film 121 is a film that adjusts the color tone by optical interference. In this embodiment, the color adjustment film 121 is composed of an oxide layer or a fluoride layer and is formed by dry plating. The color adjustment film 121 includes a first color adjustment film 1211, a second color adjustment film 1212, and a third color adjustment film 1213.

[0027] The first color adjustment film 1211 is made of a material containing at least one of Ta2O5, TiO, TiO2, TiO3, Ti2O3, Ti2O5, Ti3O5, ZrO2, and Nb2O5, and is formed to have a refractive index of 2.0 or more. This can further expand the range of color tones that can be expressed as the substrate 11, and these inorganic substances have high chemical stability, so the stability and durability of the appearance of the substrate 11 can be improved.

[0028] In addition, in the present disclosure, the refractive index is defined as a value obtained by dividing the propagation speed of light in a vacuum by the propagation speed of light in a substance.

[0029] In addition, in the present embodiment, the first color adjustment film 1211 is preferably formed to have a layer thickness of 50 nm or more. With such a configuration, colors with a wide hue range such as green, yellow, and red can be easily expressed.

[0030] In addition, in the multi-layer film 12 , the first color adjustment film 1211 may be formed as only one layer, or a plurality of first color adjustment films 1211 may be formed.

[0031] The second color adjustment film 1212 is made of a material containing at least one of SiO, Al2O3, MgO, SnO2, YF3, LaF3, CeF3 and NdF3, and has a refractive index of 1.5 or more and less than 2.0. This can further expand the range of color tones that can be displayed as the substrate 11, and these inorganic substances have high chemical stability, so the stability and durability of the appearance of the substrate 11 can be improved.

[0032] Furthermore, in the present embodiment, the second color adjustment film 1212 is preferably formed to have a layer thickness of 100 nm or more, and more preferably formed to have a layer thickness of 200 nm or more.

[0033] In the multilayer film 12, the second color adjustment film 1212 may be formed as only one layer, or may be formed as a plurality of second color adjustment films 1212. In addition, when a plurality of second color adjustment films 1212 are formed, at least one layer thereof may be formed to have a thickness of 200 nm or more. Furthermore, one layer among the plurality of second color adjustment films 1212 may be formed to have a thickness greater than that of the layers constituting the first color adjustment film 1211 and the third color adjustment film 1213.

[0034] The third color adjustment film 1213 is made of a material containing at least one of SiO2, AlF3, MgF2 and BaF2, and is formed to have a refractive index of less than 1.5. This can further expand the range of color tones that can be expressed as the substrate 11, and these inorganic substances have high chemical stability, so the stability and durability of the appearance of the substrate 11 can be improved.

[0035] In addition, in the present embodiment, the third color adjustment film 1213 is preferably formed to have a layer thickness of 50 nm or more. With such a configuration, colors with a wide hue range such as green, yellow, and red can be easily expressed.

[0036] In addition, in the multi-layer film 12 , the third color adjustment film 1213 may be formed as only one layer, or a plurality of third color adjustment films 1213 may be formed.

[0037] [Color absorption film]

[0038] The color absorbing film 122 is made of metal and formed by dry plating. More specifically, the color absorbing film 122 is made of a material containing at least one of Ag, Pt, Au, Al, Cr, Ni, Sn, Fe, and Ti. Thus, a dial 10 with high aesthetics can be provided. In addition, in the multilayer film 12, the color absorbing film 122 may be formed as only one layer, or a plurality of color absorbing films 122 may be formed. Furthermore, in the present embodiment, the multilayer film 12 is formed such that the total number of layers of the color adjustment film 121 and the color absorbing film 122 is less than 10 layers.

[0039] [Protective film]

[0040] The protective film 123 is a transparent layer laminated on the surface side of the multilayer film 12. In the present embodiment, the protective film 123 is formed of a transparent resin such as acrylic.

[0041] Next, embodiments of the present disclosure will be described.

[0042] [Example 1]

[0043] In Example 1, a multilayer film shown in Table 1 was formed on the surface of the substrate by dry plating.

[0044] As shown in Table 1, in Example 1, one layer of a first color adjustment film formed of Nb2O5 and having a refractive index of 2.20 was formed. In addition, two layers of a second color adjustment film formed of Al2O3 and having a refractive index of 1.64 were formed. In addition, two layers of a third color adjustment film formed of SiO2 and having a refractive index of 1.47 were formed. At this time, the second color adjustment film constituting the third layer was formed to have a layer thickness of 207.6 nm. In addition, the second color adjustment film constituting the third layer was formed to have the largest layer thickness among the layers constituting the multilayer film.

[0045] As a result, the hue of the dial of Example 1 was red, the lightness L* was 37, the color saturation C* was 53, and the hue angle h* was 13. That is, it is suggested that according to the structure of the multilayer film of Example 1, a dial with a hue of red, a lightness L* of 30 or more, and a color saturation C* of 50 or more can be obtained. Therefore, in Example 1 in which the layer thickness of the second color adjustment film constituting the third layer is 200 nm or more, the color saturation C* of the dial is 50 or more, indicating that a dial with very high color saturation can be obtained. In addition, in Example 1, the total number of layers of the color adjustment film and the color absorption film is 7, indicating that high color saturation can be achieved with a small number of layers less than 10.

[0046] In addition, in the present disclosure, lightness L* refers to the value of lightness in the L*a*b* color space specified by CIE (Commission Internationale d'Eclairage). When the value of L* is "0", it indicates the lightness of an object that does not reflect light at all (completely absorbs light), and when the value of L* is "100", it indicates the lightness of white that completely reflects light. In addition, color saturation C* is an index indicating the vividness of a color, and is represented by the distance between the point indicated by a* and b* and the origin of the achromatic color as shown in the following formula (1).

[0047] [Quantity 1]

[0048]

[0049] [Table 1]

[0050]

[0051] [Example 2]

[0052] In Example 2, a multilayer film shown in Table 2 was formed on the surface of the substrate by dry plating.

[0053] As shown in Table 2, in Example 2, a first color adjustment film formed of Nb2O5 and having a refractive index of 2.20 is formed. In addition, two second color adjustment films formed of Al2O3 and having a refractive index of 1.64 are formed. In addition, a third color adjustment film formed of SiO2 and having a refractive index of 1.47 is formed. At this time, the second color adjustment film constituting the fourth layer is formed to have a layer thickness of 117.8 nm. In addition, in the second embodiment, the third color adjustment film constituting the sixth layer is formed to have the largest layer thickness among the layers constituting the multilayer film.

[0054] As a result, the hue of the dial of Example 2 was purple, the lightness L* was 31, the color saturation C* was 38, and the hue angle h* was -45. That is, it is suggested that according to the structure of the multilayer film of Example 2, a dial with a hue of purple, a lightness L* of 30 or more, and a color saturation C* of 30 or more can be obtained. Therefore, in Example 2 in which the layer thickness of the second color adjustment film constituting the fourth layer is 100 nm or more, the color saturation C* of the dial is 30 or more, indicating that a dial with high color saturation can be obtained. In addition, in Example 2, the total number of layers of the color adjustment film and the color absorption film is 6 layers, indicating that high color saturation can be achieved with a small number of layers less than 10 layers.

[0055] [Table 2]

[0056]

[0057] [Example 3]

[0058] In Example 3, a multilayer film shown in Table 3 was formed on the surface of the substrate by dry plating.

[0059] As shown in Table 3, in Example 3, one layer of a first color adjustment film formed of TiO2 and having a refractive index of 2.35 was formed. In addition, three layers of a second color adjustment film formed of Al2O3 and having a refractive index of 1.64 were formed. In addition, one layer of a third color adjustment film formed of SiO2 and having a refractive index of 1.47 was formed. At this time, the second color adjustment film constituting the sixth layer was formed to have a layer thickness of 168.8 nm. In addition, the second color adjustment film constituting the sixth layer was formed to have the largest layer thickness among the layers constituting the multilayer film.

[0060] As a result, the hue of the dial of Example 3 was green, the lightness L* was 88, the color saturation C* was 45, and the hue angle h* was 102. That is, it is suggested that according to the structure of the multilayer film of Example 3, a dial with a green hue, a lightness L* of 80 or more, and a color saturation C* of 40 or more can be obtained. Therefore, in Example 3 in which the layer thickness of the second color adjustment film constituting the sixth layer is 150 nm or more, the color saturation C* of the dial is 40 or more, indicating that a dial with high color saturation can be obtained. In addition, in Example 3, the total number of layers of the color adjustment film and the color absorption film is 7, indicating that high color saturation can be achieved with a small number of layers less than 10.

[0061] [Table 3]

[0062]

[0063] [Example 4]

[0064] In Example 3, a multilayer film shown in Table 4 was formed on the surface of the substrate by dry plating.

[0065] As shown in Table 4, in Example 4, two layers of a first color adjustment film formed of Nb2O5 and having a refractive index of 2.20 were formed. In addition, one layer of a second color adjustment film formed of Al2O3 and having a refractive index of 1.64 was formed. In addition, one layer of a third color adjustment film formed of SiO2 and having a refractive index of 1.47 was formed. At this time, the second color adjustment film constituting the fourth layer was formed to have a layer thickness of 195.2 nm. In addition, the second color adjustment film constituting the fourth layer was formed to have the largest layer thickness among the layers constituting the multilayer film.

[0066] As a result, the hue of the dial of Example 4 was blue, the lightness L* was 28, the color saturation C* was 42, and the hue angle h* was -88. That is, it is suggested that according to the structure of the multilayer film of Example 4, a dial with a blue hue, a lightness L* of 25 or more, and a color saturation C* of 40 or more can be obtained. Therefore, in Example 4 in which the layer thickness of the second color adjustment film constituting the fourth layer is 150 nm or more, the color saturation C* of the dial is 40 or more, indicating that a dial with high color saturation can be obtained. In addition, in Example 4, the total number of layers of the color adjustment film and the color absorption film is 6 layers, indicating that high color saturation can be achieved with a small number of layers less than 10 layers.

[0067] [Table 4]

[0068]

[0069] [Modifications]

[0070] In addition, the present disclosure is not limited to the above-mentioned embodiments, and modifications, improvements, etc. within the scope that can achieve the purpose of the present disclosure are included in the present disclosure.

[0071] In the above-described embodiment, the protective film 123 is laminated on the surface side of the multilayer film 12, but the present invention is not limited thereto. The present disclosure also includes a case where the protective film is not laminated on the surface side of the multilayer film.

[0072] In the above embodiment, the watch component of the present disclosure is constituted as a dial 10, but is not limited thereto. For example, the watch component of the present disclosure may also be constituted as any one of a housing, a strap, a scale ring, a bezel, a movement, a pointer, an abbreviation, a month wheel, and a month plate.

[0073] [Summary of the present disclosure]

[0074] The timepiece component disclosed in the present invention is characterized in that the timepiece component comprises: a substrate; and a multilayer film covering at least a portion of the substrate, the multilayer film comprising a color adjustment film, the color adjustment film being composed of an oxide layer or a fluoride layer and being formed by dry plating, the color adjustment film comprising: a first color adjustment film having a refractive index of greater than 2.0; a second color adjustment film having a refractive index of greater than 1.5 and less than 2.0; and a third color adjustment film having a refractive index of less than 1.5.

[0075] In the present invention, the color adjustment film formed by dry plating includes a first color adjustment film having a refractive index of 2.0 or more, a second color adjustment film having a refractive index of 1.5 or more and less than 2.0, and a third color adjustment film having a refractive index of less than 1.5. Thus, a watch component capable of expressing a color tone with high color saturation can be provided.

[0076] In the timepiece component of the present disclosure, the second color adjustment film may have a layer thickness greater than that of the first color adjustment film and the third color adjustment film and be equal to or greater than 100 nm.

[0077] Thus, a timepiece component having a high color saturation in which the color saturation C* is 30 or more can be provided.

[0078] In the timepiece component of the present disclosure, the second color adjustment film may have a layer thickness of 200 nm or more.

[0079] Thus, a timepiece component having a color saturation C* of 50 or more and a higher color saturation can be provided.

[0080] In the timepiece component of the present disclosure, the first color adjustment film and the third color adjustment film may have a layer thickness of 50 nm or more.

[0081] This makes it possible to easily express colors having a wide hue range, such as green, yellow, and red.

[0082] In the timepiece component of the present invention, the first color adjustment film may be made of a material containing at least one of Ta2O5, TiO, TiO2, TiO3, Ti2O3, Ti2O5, Ti3O5, ZrO2, and Nb2O5.

[0083] This can further expand the range of color tones that can be expressed as a base material. In addition, these inorganic substances have high chemical stability, so the stability and durability of the appearance of the base material can be improved.

[0084] In the timepiece component of the present invention, the second color adjustment film may be made of a material containing at least one of SiO, Al2O3, MgO, SnO2, YF3, LaF3, CeF3, and NdF3.

[0085] This can further expand the range of color tones that can be expressed as a base material. In addition, these inorganic substances have high chemical stability, so the stability and durability of the appearance of the base material can be improved.

[0086] In the timepiece component of the present invention, the third color adjustment film may be made of a material containing at least one of SiO 2 , AlF 3 , MgF 2 and BaF 2 .

[0087] This can further expand the range of color tones that can be expressed as a base material. In addition, these inorganic substances have high chemical stability, so the stability and durability of the appearance of the base material can be improved.

[0088] In the timepiece component of the present disclosure, the multilayer film may include a color absorbing film composed of a metal layer, and the total number of layers including the color adjustment film and the color absorbing film may be less than 10 layers.

[0089] Thus, high color saturation can be achieved with a small number of layers, less than 10 layers.

[0090] In the timepiece component of the present disclosure, the color absorption film may be formed of a material containing at least one of Ag, Pt, Au, Al, Cr, Ni, Sn, Fe, and Ti.

[0091] Thus, since the color absorbing film is made of metal, it is possible to provide a timepiece component having excellent aesthetics.

[0092] A timepiece disclosed in the present invention is characterized by including the timepiece component described above.

Claims

1. A watch component, characterized in that: have: Base material; as well as a multilayer film covering at least a portion of the substrate, The multilayer film has a color adjustment film, which is composed of an oxide layer or a fluoride layer and is formed by dry plating. The color adjustment film has: A first color adjustment film having a refractive index of 2.0 or more; A second color adjustment film having a refractive index of 1.5 or more and less than 2.0; and A third color adjustment film having a refractive index less than 1.

5.

2. The watch component according to claim 1, wherein: The second color adjustment film has a thickness greater than that of the first color adjustment film and the third color adjustment film, and is equal to or greater than 100 nm.

3. The watch component according to claim 2, wherein: The second color adjustment film has a layer thickness of 200 nm or more.

4. The timepiece component according to claim 1, wherein: The first color adjustment film and the third color adjustment film have a layer thickness of 50 nm or more.

5. The timepiece component according to claim 1, wherein: The first color adjustment film is made of a material containing at least one of Ta2O5, TiO, TiO2, TiO3, Ti2O3, Ti2O5, Ti3O5, ZrO2, and Nb2O5.

6. The timepiece component according to claim 1, wherein: The second color adjustment film is made of a material containing at least one of SiO, Al2O3, MgO, SnO2, YF3, LaF3, CeF3, and NdF3.

7. The timepiece component according to claim 1, wherein: The third color adjustment film is made of a material containing at least one of SiO 2 , AlF 3 , MgF 2 and BaF 2 .

8. The timepiece component according to claim 1, wherein: The multilayer film includes a color absorbing film composed of a metal layer, and the total number of layers of the color adjustment film and the color absorbing film is less than 10 layers.

9. The timepiece component according to claim 8, wherein: The color absorption film is composed of a material containing at least one of Ag, Pt, Au, Al, Cr, Ni, Sn, Fe and Ti.

10. A timepiece, characterized in that: A timepiece component according to claim 1.

Images