Timepiece component and timepiece

Abstract

To provide a timepiece component which can express a color tone with a high saturation.SOLUTION: The timepiece component includes a base material and a multilayer film covering at least a part of the base material. The multilayer film has a color adjusting film formed of one of an oxide layer and a fluoride layer and obtained by a dry plating method. The color adjusting film includes: a first color adjustment film with an index of refraction of at least 2.0; a second color adjustment film with an index of refraction of at least 1.5 and smaller than 2.0; and a third color adjustment film with an index of refraction of smaller than 1.5.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] Patent Document 1 discloses a watch component in which a color-tuning film for adjusting color tone is laminated on a substrate that is a glossy metallic portion. In the watch component of Patent Document 1, the color tone of the appearance is adjusted by the metallic gloss portion and the color-tuning film, thereby making it possible to achieve excellent aesthetics without using precious metals as the main material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-124267 A Summary of the Invention [Problem to be solved by the invention]

[0004] Although the technique disclosed in Patent Document 1 can provide aesthetic qualities similar to those of precious metals, it has the problem that it is difficult to express highly saturated colors. [Means for solving the problem]

[0005] The watch component disclosed herein comprises a substrate and a multilayer film covering at least a portion of the substrate, the multilayer film being composed of an oxide layer or a fluoride layer and comprising a color adjustment film formed by dry plating, the color adjustment film comprising 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 adjustment film having a refractive index less than 1.5.

[0006] The timepiece disclosed herein is characterized in that it is constructed using timepiece parts manufactured using the method for manufacturing timepiece parts described above. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a front view showing a timepiece according to an embodiment. [Diagram 2] FIG. 4 is a cross-sectional view showing a main part of the dial of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [Embodiment] A timepiece 1 according to an embodiment of the present disclosure will now be described with reference to the drawings. 1 is a front view of the timepiece 1. In this embodiment, the timepiece 1 is configured as a wristwatch that is worn on the user's wrist. As shown in Fig. 1, timepiece 1 has a metal case 2. Inside case 2 are a disk-shaped dial 10, a second hand 3, a minute hand 4, an hour hand 5, a crown 7, button A 8, and button B 9. Note that dial 10 is an example of a timepiece component of the present disclosure. Dial 10 is provided with hour marks 6 for indicating the time.

[0009] [Dial] FIG. 2 is a cross-sectional view showing a main part of the dial 10. As shown in FIG. As shown in the figure, the dial 10 comprises a substrate 11 and a multilayer film 12 . In this embodiment, the entire substrate 11 is covered with the multilayer film 12. The dial 10 is not limited to the above configuration, and for example, the multilayer film 12 may be laminated so as to cover a portion of the surface 111 of the substrate 11.

[0010] [Base material] The material of the base material 11 is composed of a metal such as iron, brass, aluminum, etc., a resin, etc. When the base material 11 is composed of a resin, the resin may be a non-light-transmitting resin that does not transmit light, or may be a light-transmitting resin that transmits light.

[0011] [Multilayer film] The multilayer film 12 includes a color adjustment film 121 , a color absorbing film 122 , and a protective film 123 , and is laminated on the surface 111 of the substrate 11 .

[0012] [Color adjustment film] The color adjustment film 121 is a film that adjusts 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.

[0013] 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 so as to have a refractive index of 2.0 or more. This makes it possible to broaden the range of colors that can be expressed as the base material 11, and since these inorganic substances have high chemical stability, it is possible to increase the stability and durability of the appearance of the base material 11. In this disclosure, the refractive index is defined as the value obtained by dividing the propagation speed of light in a vacuum by the propagation speed of light in a substance. In this embodiment, the first color adjustment film 1211 is preferably formed to have a layer thickness of 50 nm or more. By configuring in this way, it is possible to easily express colors of a wide range of hues, such as green, yellow, and red. In the multilayer film 12, only one first color adjustment film 1211 may be formed, or a plurality of first color adjustment films 1211 may be formed.

[0014] 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 is formed so as to have a refractive index of 1.5 or more and less than 2.0. This makes it possible to broaden the range of colors that can be expressed as the base material 11, and since these inorganic substances have high chemical stability, it is possible to improve the stability and durability of the appearance of the base material 11. In this 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.

[0015] In the multilayer film 12, only one second color adjustment film 1212 may be formed, or multiple second color adjustment films 1212 may be formed. When multiple second color adjustment films 1212 are formed, at least one of them may be formed to have a layer thickness of 200 nm or more. One of the multiple second color adjustment films 1212 may be formed to have a layer thickness larger than the layers constituting the first color adjustment film 1211 and the third color adjustment film 1213.

[0016] The third color adjustment film 1213 is made of a material containing at least one of SiO2, AlF3, MgF2, and BaF2, and is formed so as to have a refractive index of less than 1.5. This makes it possible to broaden the range of colors that can be expressed by the base material 11, and since these inorganic substances have high chemical stability, it is possible to improve the stability and durability of the appearance of the base material 11. In this embodiment, the third color adjustment film 1213 is preferably formed to have a layer thickness of 50 nm or more. By configuring in this way, it becomes easier to express colors of a wide range of hues, such as green, yellow, and red. In the multilayer film 12, only one third color adjustment film 1213 may be formed, or a plurality of third color adjustment films 1213 may be formed.

[0017] [Color absorbing film] 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. This makes it possible to provide a dial 10 with high aesthetic appeal. In the multilayer film 12, the color absorbing film 122 may be formed as a single layer, or multiple color absorbing films 122 may be formed. Furthermore, in this embodiment, the multilayer film 12 is formed so that the total number of layers, including the color adjustment film 121 and the color absorbing film 122, is less than 10 layers.

[0018] [Protective film] The protective film 123 is a transparent layer laminated on the front surface side of the multilayer film 12. In this embodiment, the protective film 123 is made of a transparent resin such as acrylic.

[0019] Next, an embodiment of the present disclosure will be described. [Example 1] In Example 1, a multilayer film as shown in Table 1 was formed on the surface of a substrate by dry plating. As shown in Table 1, in Example 1, one layer of a first color adjustment film made of Nb2O5 and having a refractive index of 2.20 was formed. Two layers of a second color adjustment film made of Al2O3 and having a refractive index of 1.64 were formed. Two layers of a third color adjustment film made of SiO2 and having a refractive index of 1.47 were formed. In this case, the second color adjustment film constituting the third layer was formed to have a layer thickness of 207.6 nm. The second color adjustment film constituting the third layer was formed to have the largest layer thickness among the layers constituting the multilayer film.

[0020] As a result, the dial of Example 1 had a red hue, a lightness L* of 37, a chroma C* of 53, and a hue angle h* of 13. In other words, it was suggested that the multilayer film configuration of Example 1 could provide a dial with a red hue, a lightness L* of 30 or more, and a chroma C* of 50 or more. This suggests that in Example 1, in which the layer thickness of the second color adjustment film constituting the third layer is 200 nm or more, the chroma C* of the dial is 50 or more, and a dial with very high chroma can be obtained. Furthermore, in Example 1, the total number of layers including the color adjustment film and the color absorption film is 7, suggesting that high chroma can be achieved with a small number of layers, less than 10 layers.

[0021] In this disclosure, lightness L* is the lightness value in the L*a*b* color space defined by the CIE (Commission Internationale d'Eclairage; International Commission on Illumination). An L* value of "0" represents the lightness of an object that does not reflect light at all (absorbs light completely), and an L* value of "100" represents the lightness value of white that completely reflects light. Saturation C* is an index of color vividness, and is represented by the distance between the point indicated by a* and b* and the achromatic origin, as shown in the following formula (1).

[0022]

number

[0023] [Table 1]

[0024] [Example 2] In Example 2, a multilayer film as shown in Table 2 was formed on the surface of the base material by dry plating. As shown in Table 2, in Example 2, one layer of a first color adjustment film made of Nb2O5 and having a refractive index of 2.20 was formed. Two layers of a second color adjustment film made of Al2O3 and having a refractive index of 1.64 were formed. Furthermore, one layer of a third color adjustment film made 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 117.8 nm. In addition, in Example 2, the third color adjustment film constituting the sixth layer was formed to have the largest layer thickness among the layers constituting the multilayer film.

[0025] As a result, the dial of Example 2 had a purple hue, a lightness L* of 31, a chroma C* of 38, and a hue angle h* of -45. That is, it was suggested that the multilayer film configuration of Example 2 could provide a dial with a purple hue, a lightness L* of 30 or more, and a chroma C* of 30 or more. This suggested that Example 2, in which the layer thickness of the second color adjustment film constituting the fourth layer was 100 nm or more, provided a dial with a chroma C* of 30 or more, and a dial with high chroma. Furthermore, in Example 2, the total number of layers including the color adjustment film and the color absorption film was six, suggesting that high chroma could be achieved with a small number of layers, less than 10 layers.

[0026] [Table 2]

[0027] [Example 3] In Example 3, a multilayer film as shown in Table 3 was formed on the surface of a substrate by dry plating. As shown in Table 3, in Example 3, one layer of a first color adjustment film made of TiO2 and having a refractive index of 2.35 was formed. Three layers of a second color adjustment film made of Al2O3 and having a refractive index of 1.64 were formed. Furthermore, one layer of a third color adjustment film made of SiO2 and having a refractive index of 1.47 was formed. In this case, the second color adjustment film constituting the sixth layer was formed to have a layer thickness of 168.8 nm. The second color adjustment film constituting the sixth layer was formed to have the largest layer thickness among the layers constituting the multilayer film.

[0028] As a result, the dial of Example 3 had a green hue, a lightness L* of 88, a chroma C* of 45, and a hue angle h* of 102. In other words, it was suggested that the multilayer film configuration of Example 3 could provide a dial with a green hue, a lightness L* of 80 or more, and a chroma C* of 40 or more. This suggests that Example 3, in which the layer thickness of the second color adjustment film constituting the sixth layer is 150 nm or more, provides a dial with a chroma C* of 40 or more, and a high chroma. Furthermore, in Example 3, the total number of layers including the color adjustment film and the color absorption film is seven, suggesting that high chroma can be achieved with a small number of layers, less than 10 layers.

[0029] [Table 3]

[0030] [Example 4] In Example 3, a multilayer film as shown in Table 4 was formed on the surface of a substrate by dry plating. As shown in Table 4, in Example 4, two layers of a first color adjustment film made of Nb2O5 and having a refractive index of 2.20 were formed. In addition, one layer of a second color adjustment film made of Al2O3 and having a refractive index of 1.64 was formed. Furthermore, one layer of a third color adjustment film made of SiO2 and having a refractive index of 1.47 was formed. In this case, the second color adjustment film constituting the fourth layer was formed to have a layer thickness of 195.2 nm. The second color adjustment film constituting the fourth layer was formed to have the largest layer thickness among the layers constituting the multilayer film.

[0031] As a result, the dial of Example 4 had a hue of deep blue, a lightness L* of 28, a chroma C* of 42, and a hue angle h* of -88. In other words, it was suggested that the multilayer film configuration of Example 4 could provide a dial with a hue of deep blue, a lightness L* of 25 or more, and a chroma C* of 40 or more. This suggested that Example 4, in which the layer thickness of the second color adjustment film constituting the fourth layer was 150 nm or more, could provide a dial with a chroma C* of 40 or more, and a high chroma. Furthermore, in Example 4, the total number of layers including the color adjustment film and the color absorption film was six, suggesting that high chroma could be achieved with a small number of layers, less than 10 layers.

[0032] [Table 4]

[0033] [Variations] The present disclosure is not limited to the above-described embodiments, and modifications, improvements, etc. within the scope that can achieve the object of the present disclosure are included in the present disclosure.

[0034] In the above-described embodiment, the protective film 123 is laminated on the front surface side of the multilayer film 12, but this is not limited to this. The present disclosure also includes a case where no protective film is laminated on the front surface side of the multilayer film.

[0035] In the above-described embodiment, the timepiece part of the present disclosure is configured as the dial 10, but is not limited to this. For example, the timepiece part of the present disclosure may be configured as any one of a case, a band, a dial ring, a bezel, a movement, a hand, an abbreviation, a moon phase indicator, and a moon phase plate.

[0036] [Summary of this disclosure] The watch component disclosed herein comprises a substrate and a multilayer film covering at least a portion of the substrate, the multilayer film being composed of an oxide layer or a fluoride layer and comprising a color adjustment film formed by dry plating, the color adjustment film comprising 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 adjustment film having a refractive index less than 1.5. In the present disclosure, 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. This makes it possible to provide a watch component that can express highly saturated colors.

[0037] In the watch component of the present disclosure, the second color adjustment film may have a layer thickness greater than those of the first color adjustment film and the third color adjustment film, and may be 100 nm or greater. This makes it possible to provide watch components with high chroma, with a chroma C* of 30 or more.

[0038] In the watch component of the present disclosure, the second color adjustment film may have a layer thickness of 200 nm or more. This makes it possible to provide watch components with a higher chroma, with a chroma C* of 50 or more.

[0039] In the watch 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. This makes it easier to express a wide range of colors, such as green, yellow, and red.

[0040] In the timepiece component of the present disclosure, 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. This allows a wider range of colors to be expressed as a substrate. Furthermore, since these inorganic substances have high chemical stability, the stability and durability of the appearance of the substrate can be improved.

[0041] In the timepiece component of the present disclosure, 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. This allows a wider range of colors to be expressed as a substrate. Furthermore, since these inorganic substances have high chemical stability, the stability and durability of the appearance of the substrate can be improved.

[0042] In the watch component of the present disclosure, the third color adjustment film may be made of a material containing at least one of SiO2, AlF3, MgF2, and BaF2. This allows a wider range of colors to be expressed as a substrate. Furthermore, since these inorganic substances have high chemical stability, the stability and durability of the appearance of the substrate can be improved.

[0043] In the timepiece component of the present disclosure, the multilayer film may include a color absorbing film composed of metal layers, and the total number of layers of the color adjustment film and the color absorbing film may be less than 10 layers. This makes it possible to achieve high color saturation with fewer than 10 layers.

[0044] In the timepiece component of the present disclosure, the color absorbing film may be made of a material containing at least one of Ag, Pt, Au, Al, Cr, Ni, Sn, Fe, and Ti. As a result, since the color absorbing film is made of metal, it is possible to provide a timepiece component with excellent aesthetic appeal.

[0045] The timepiece of the present disclosure is characterized by including the timepiece component described above. [Explanation of symbols]

[0046] 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 part), 11...base material, 12...multilayer film, 111...surface, 121...color adjustment film, 122...color absorbing film, 123...protective film, 1211...first color adjustment film, 1212...second color adjustment film, 1213...third color adjustment film.

Claims

1. A substrate; A multilayer film covering at least a portion of the substrate, the multilayer film is composed of an oxide layer or a fluoride layer, and has a color adjustment film formed by dry plating; The color adjustment film 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 less than 1.

5. A watch component characterized by:

2. In the watch component according to claim 1, The second color adjustment film has a thickness larger than those of the first color adjustment film and the third color adjustment film, and is 100 nm or more. A watch component characterized by:

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

4. In the watch component according to claim 1, The first color adjustment film and the third color adjustment film each have a layer thickness of 50 nm or more. A watch component characterized by:

5. In the watch component according to claim 1, The first color adjustment film is Ta ２ O ５ , TiO, TiO ２ , TiO ３ , Ti ２ O ３ , Ti ２ O ５ , Ti ３ O ５ , ZrO ２ , and Nb ２ O ５ The material is at least one of A watch component characterized by:

6. In the watch component according to claim 1, The second color adjustment film is made of SiO, Al ２ O ３ , MgO, SnO ２ , Y.F. ３ , LaF ３ , CeF ３ , and NdF ３ The material is at least one of A watch component characterized by:

7. In the watch component according to claim 1, The third color adjustment film is made of SiO ２ , AlF ３ , MgF ２ , and BaF ２ The material is at least one of A watch component characterized by:

8. In the watch component according to claim 1, The multilayer film includes a color absorbing film formed of a metal layer, and the total number of layers of the color adjustment film and the color absorbing film is less than 10. A watch component characterized by:

9. In the watch component according to claim 8, The color absorbing film is made of a material containing at least one of Ag, Pt, Au, Al, Cr, Ni, Sn, Fe, and Ti. A watch component characterized by:

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

Images