Watch dial and watch

Abstract

To provide a watch dial having various and high aesthetic properties.SOLUTION: A watch dial comprises: a translucent substrate; a front gradation colored film which is formed by coloring a front face coloring material in gradation, on a front face of the translucent substrate; and a rear gradation colored film which is formed by coloring a rear face coloring material in gradation, on a rear face of the translucent substrate. Because the front gradation colored film and the rear gradation colored film are formed by gradation coloring in which density of applied color changes, a watch dial having various and high aesthetic properties can be provided.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a timepiece dial and to a timepiece equipped with such a dial. [Background technology]

[0002] Patent Document 1 discloses a watch dial comprising a support and a mother-of-pearl sheet. The mother-of-pearl sheet has a front surface and a rear surface facing the support and having a pattern printed thereon. The mother-of-pearl sheet is formed with a thickness dimension such that the pattern printed on the rear surface of the mother-of-pearl sheet is visible through the mother-of-pearl under normal lighting conditions. In Patent Document 2, [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2021-510820 Summary of the Invention [Problem to be solved by the invention]

[0004] The dial in Patent Document 1 has a pattern printed on the back surface of the mother-of-pearl sheet base by silk screen printing, photolithography, inkjet printing, etc. This makes it possible to realize a watch dial that makes the most of the pattern of the mother-of-pearl sheet, but there is a demand for more diverse and aesthetically pleasing watch dials and watches. [Means for solving the problem]

[0005] The timepiece dial of the present disclosure comprises a translucent substrate, a front gradation colored film formed on the front surface of the translucent substrate by gradation coloring with a front coloring material, and a back gradation colored film formed on the back surface of the translucent substrate by gradation coloring with a back coloring material.

[0006] The timepiece of the present disclosure is equipped with the timepiece dial described above. [Brief description of the drawings]

[0007] [Figure 1] 1 is a front view showing a timepiece having a timepiece dial of a first embodiment. FIG. [Diagram 2] FIG. 2 is a cross-sectional view showing the timepiece dial of the first embodiment. [Diagram 3] FIG. 2 is an exploded view showing the layer structure of the timepiece dial of the first embodiment. [Figure 4] FIG. 2 is an exploded perspective view showing the layer structure of the timepiece dial of the first embodiment. [Diagram 5] FIG. 11 is a cross-sectional view showing a timepiece dial of a second embodiment. [Figure 6] FIG. 11 is an exploded perspective view showing the layer structure of the timepiece dial of the second embodiment. [Figure 7] FIG. 11 is a cross-sectional view showing a timepiece dial of a third embodiment. [Figure 8] FIG. 11 is an exploded perspective view showing the layer structure of the timepiece dial of the third embodiment. [Figure 9] FIG. 11 is a cross-sectional view showing a timepiece dial of a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] [First embodiment] FIG. 1 is a front view showing a timepiece 1 having a timepiece dial 3 of the first embodiment. The timepiece 1 is a wristwatch worn on the wrist of a user, and is equipped with a cylindrical outer case 2, and the timepiece dial 3 is arranged on the inner circumference side of the outer case 2. Of the two openings of the outer case 2, the opening on the front side is closed with a cover crystal, and the opening on the back side is closed with a back cover. Furthermore, the timepiece 1 is equipped with a movement (not shown) housed in the outer case 2, an hour hand 4A, a minute hand 4B, and a second hand 4C that are hands that indicate time information, an index 5 attached to the timepiece dial 3, and a crown 7. The index 5 of the timepiece 1 of this embodiment uses Roman numerals, but it may also use Arabic numerals or be composed of bar indexes, and the type of index is not limited to Roman numerals. In the following description, a plan view means that the timepiece dial 3 is viewed in a direction perpendicular to the surface of the timepiece dial 3, that is, from the axial direction of the axis to which the hands are attached. The surface of each part means the surface facing the cover crystal, and the back surface of each part means the surface facing the back cover.

[0009] As shown in Figures 2 to 4, the timepiece dial 3 is constructed by sequentially laminating a front gradation colored film 10, a light-transmitting substrate 20, a back gradation colored film 30, a backing colored film 40, and a base material 50 from the front side of the timepiece 1, i.e., the cover crystal side, to the back side of the timepiece 1, i.e., the back cover side. The light-transmitting substrate 20 is a substrate made of a semi-transmitting material that transmits light, that is, that transmits visible light. For this reason, the light-transmitting substrate 20 may be any substrate that allows the back side to be viewed from the front side, and in this embodiment, is made of mother-of-pearl. Mother-of-pearl is a plate-shaped member made by slicing the shell of a mother-of-pearl shell, such as a white butterfly shell, which is used in pearl culture. In this embodiment, the light-transmitting substrate 20 is made of thin mother-of-pearl with a thickness of about 50 μm to 200 μm. In particular, in terms of facilitating handling and ensuring light transmissivity, it is preferable that the light-transmitting substrate 20 made of mother-of-pearl has a thickness of about 100 μm. The light-transmitting substrate 20 is formed in a planar circular plate shape, and a through hole 23 through which the pointer shaft is inserted is formed in the center of the planar shape.

[0010] The front gradation colored film 10 is formed by gradationally coloring the surface 21 of the light-transmitting substrate 20 with a surface coloring material by painting or printing. Gradation coloring means that the density of the color is changed continuously or stepwise by painting or printing a surface coloring material. Specifically, the coloring density of the coloring material is changed by increasing or decreasing the amount of the surface coloring material applied or printed per unit area, and the density of the color is changed continuously or stepwise. For example, when gradation coloring is realized by painting, the light-transmitting substrate 20 is placed on a rotating table and rotated, and the surface 21 of the light-transmitting substrate 20 is colored by applying a paint as a surface coloring material using a spray gun. In this case, when the center of the discharge direction of the paint discharged from the nozzle of the spray gun is directed toward the outer periphery of the light-transmitting substrate 20 rotating around the through hole 23, the density of the paint is high at the outer periphery of the light-transmitting substrate 20 and the coloring is dark. On the other hand, the density of the paint is low toward the inner periphery of the light-transmitting substrate 20 and the coloring is lighter. Therefore, by painting, it is possible to realize gradation coloring in a concentric shape centered on the through hole 23 and in which the color becomes lighter from the outer periphery of the light-transmitting substrate 20 toward the inside. The range in which the surface gradation colored film 10 is formed can be changed by adjusting the aperture of the nozzle of the spray gun. That is, by narrowing the nozzle of the spray gun to narrow the paint ejection range, the formation range of the front gradation colored film 10 can be narrowed, and by widening the nozzle of the spray gun to widen the paint ejection range, the formation range of the front gradation colored film 10 can be widened. In this embodiment, the outer peripheral edge 11 of the front gradation colored film 10 is located at the same position as the outer peripheral edge 24 of the light-transmitting substrate 20 in a plan view, and the inner peripheral edge 12 is located outside the radial midpoint from the through hole 23 of the light-transmitting substrate 20 to the outer periphery, that is, the position of 1 / 2 the radius. Therefore, on the surface 21 of the light-transmitting substrate 20, the front gradation colored film 10 is provided outside the radial midpoint.

[0011] The back gradation colored film 30 is formed by applying a back coloring material to the back surface 22 of the light-transmitting substrate 20 by painting or printing. In this embodiment, as with the front gradation colored film 10, the light-transmitting substrate 20 is placed on a rotating table and rotated, and the back surface 22 of the light-transmitting substrate 20 is colored by applying a paint serving as a back coloring material using a spray gun. In this embodiment, the outer peripheral edge 31 of the back gradation colored film 30 is located at the same position as the outer peripheral edge 24 of the light-transmitting substrate 20 in a plan view, and the inner peripheral edge 32 is located inside the middle position in the radial direction from the through hole 23 to the outer periphery of the light-transmitting substrate 20, that is, the position of 1 / 2 of the radius. Specifically, the back gradation colored film 30 is formed between the outer peripheral edge 24 of the back surface 22 of the light-transmitting substrate 20 and the position of approximately 3 / 4 of the radius from the outer peripheral edge 24 in the radial direction, and is gradation colored in a concentric shape centered on the through hole 23, and the color becomes lighter from the outer periphery of the light-transmitting substrate 20 toward the inside. On the rear surface 22 of the light-transmitting substrate 20, the area where the rear gradation colored film 30 is not provided is inside the radial center position, and the rear gradation colored film 30 is provided in the range from inside the center position to the outer circumferential edge 24.

[0012] As described above, the front gradation colored film 10 and the back gradation colored film 30 are colored in a concentric shape with the through hole 23 as the center, and in a gradation that is darker on the outer periphery and lighter toward the inner periphery. The cross-sectional views of Figures 2 and 3 show that the film thickness of the front gradation colored film 10 and the back gradation colored film 30 is thicker in the darker parts, that is, the outer periphery side of the light-transmitting substrate 20, and gradually thinner toward the inner periphery, so that the color of the front gradation colored film 10 and the back gradation colored film 30 gradually becomes lighter from the outer periphery side toward the inner periphery side. For this reason, in the actual timepiece dial 3, the film thickness of the front gradation colored film 10 and the back gradation colored film 30 is almost the same in the radial direction of the timepiece dial 3, or is slightly thicker on the outer periphery side, and there is no change in thickness that can be distinguished by the naked eye. Furthermore, because the film thickness of the front gradation colored film 10 and the back gradation colored film 30 is small, when the timepiece dial 3 is viewed from the front side, a complex and delicate design can be realized, particularly on the inner peripheral side where the color is light, due to the influence of the back gradation colored film 30 and the backing colored film 40 laminated on the back side. Note that the film thickness of the front gradation colored film 10 and the back gradation colored film 30 is 10 μm or less, i.e., several μm, in the dark colored parts, and the film thickness gradually decreases from several μm to 0 μm from the dark colored parts to the light colored parts, and this point is the same for other embodiments described later.

[0013] The backing colored film 40 is formed by painting or printing a backing coloring material on the back surface 22 of the light-transmitting substrate 20 and the back surface of the back gradation colored film 30. The backing colored film 40 is a film colored with a single color with a nearly constant color density, and differs from the front gradation colored film 10 and the back gradation colored film 30 in that the color density does not change. The backing color film 40 is formed in the region from the through hole 23 to the outer periphery 24 of the light-transmitting substrate 20. Therefore, in the region where the back gradation color film 30 is formed, the backing color film 40 is laminated on the back surface of the back gradation color film 30. In other words, the back gradation color film 30 is formed between the light-transmitting substrate 20 and the backing color film 40. When printing the front gradation colored film 10, the back gradation colored film 30, and the backing colored film 40, they may be colored by inkjet printing using inks for the front coloring material, the back coloring material, and the backing coloring material, respectively.

[0014] The base material 50 is a disk-shaped plate material made of metal or synthetic resin, and is provided to ensure the strength of the timepiece dial 3. A through hole 53 through which the pointer shaft is inserted is formed in the center of the plane of the base material 50. The surface 51 of the substrate 50 is adhered to the colored backing film 40 with an adhesive. The adhesive may be applied to the surface 51 of the substrate 50 by, for example, screen printing or spraying. The substrate 50 may be joined using a double-sided tape instead of an adhesive.

[0015] The colors of the front gradation colored film 10, the back gradation colored film 30, and the backing colored film 40 may be appropriately set according to the design of the timepiece dial 3. For example, by using black for the front coloring material, light blue for the back coloring material, and blue for the backing coloring material, or dark blue for the front coloring material, pink for the backing coloring material, and purple for the backing coloring material, or dark green for the front coloring material, yellow-green for the backing coloring material, and green for the backing coloring material, a timepiece dial 3 that has a seasonal feel and is highly aesthetic can be realized.

[0016] Because the timepiece dial 3 has the above-mentioned layer structure, as shown in Figures 2 and 3, in a plan view seen from the front side of the timepiece 1, a ring-shaped first region 61 is provided around the through-holes 23, 53 in which the translucent substrate 20 and the backing colored film 40 are laminated and can be seen. Also, in a plan view, a ring-shaped second region 62 is provided around the first region 61 in which the translucent substrate 20, the back gradation colored film 30, and the backing colored film 40 are laminated and can be seen. Furthermore, in a plan view, a ring-shaped third region 63 is provided around the second region 62 in which the front gradation colored film 10, the translucent substrate 20, the back gradation colored film 30, and the backing colored film 40 are laminated and can be seen.

[0017] The timepiece dial 3 of this embodiment is formed by forming a front gradation colored film 10 on the front surface 21 of a light-transmitting substrate 20, forming a back gradation colored film 30 and a backing colored film 40 sequentially on the back surface 22 of the light-transmitting substrate 20, and adhering a base material 50 to the back surface of the backing colored film 40, and the order of stacking is not particularly limited.

[0018] According to the timepiece dial 3 of this embodiment, when viewed in a plane, it has three regions, namely a first region 61, a second region 62, and a third region 63, and each of these regions 61 to 63 has a different layer structure, which improves the design and aesthetics of the timepiece dial 3. The first region 61 has a layered structure in which a colored backing film 40 is formed on the back surface of a light-transmitting substrate 20 made of mother-of-pearl, so that a design can be realized in which the color of the colored backing film 40 is overlaid while making use of the mother-of-pearl pattern. The second region 62 has a layered structure in which the back gradation colored film 30 and the backing colored film 40 are laminated on the back surface of the light-transmitting substrate 20 made of mother-of-pearl, so that a delicate design can be realized in which the changes in color shade due to the gradation coloring of the back gradation colored film 30 and the coloring of the backing colored film 40 are overlapped while making use of the mother-of-pearl pattern. The third region 63 has a layered structure in which the front gradation colored film 10 is laminated on the front surface of the light-transmitting substrate 20 made of mother-of-pearl, and the back gradation colored film 30 and the backing colored film 40 are laminated on the back surface, so that a delicate design can be realized in which the changes in color shade due to the gradation coloring of the front gradation colored film 10 and the back gradation colored film 30 overlap with the coloring of the backing colored film 40 while making use of the mother-of-pearl pattern. As a result of the above, the aesthetic appeal of the timepiece dial 3 can be improved.

[0019] Since the backing color film 40 is formed on the front side of the base material 50, the base material 50 cannot be seen through the light-transmitting substrate 20. This prevents the design of the timepiece dial 3 from being hindered by the base material 50, and the provision of the base material 50 makes it possible to achieve both strength and design.

[0020] The front gradation colored film 10 and the back gradation colored film 30 have a gradation coloring in which the color is darker on the outer periphery and lighter toward the inner periphery, thereby enabling a delicate and highly aesthetic design to be realized.

[0021] [Second embodiment] A timepiece dial 3B of the second embodiment will be described with reference to FIG. 5 and FIG. The timepiece dial 3B includes a front gradation colored film 10B, a light-transmitting substrate 20B, a back gradation colored film 30B, a backing colored film 40B, and a base material 50B. The light-transmitting substrate 20B, the backing colored film 40B, and the base material 50B have the same configuration as in the first embodiment, so a description thereof will be omitted.

[0022] The front gradation colored film 10B is formed by gradationally coloring the surface 21 of the light-transmitting substrate 20B with a surface coloring material by inkjet printing. In this embodiment, the inner peripheral edge 12 of the front gradation colored film 10B is located along the through-hole 23 of the light-transmitting substrate 20B in a plan view, and the outer peripheral edge 11 is located inside the middle position in the radial direction from the through-hole 23 to the outer periphery of the light-transmitting substrate 20B in a plan view, that is, the position of 1 / 2 the radius.

[0023] The back gradation colored film 30B is formed by gradationally coloring the back surface 22 of the light-transmitting substrate 20B with a back surface coloring material by inkjet printing. In this embodiment, the inner peripheral edge 32 of the back gradation colored film 30B is located along the through hole 23 of the light-transmitting substrate 20B in a plan view, and the outer peripheral edge 31 is formed to a position approximately 3 / 4 of the way in the radial direction from the through hole 23 to the outer periphery of the light-transmitting substrate 20B in a plan view. Therefore, the outer peripheral edge 31 of the back gradation colored film 30B is located outside the outer peripheral edge 11 of the front gradation colored film 10B.

[0024] The front gradation colored film 10B and the back gradation colored film 30B are colored in a concentric shape with the through hole 23 as the center, with the color gradation being darker on the inner periphery and becoming lighter toward the outer periphery. Therefore, in the cross-sectional view of Fig. 5, as in Fig. 2, the film thickness of the dark-colored portion of the front gradation colored film 10B and the back gradation colored film 30B, that is, the central portion along the through hole 23 of the light-transmitting substrate 20B, is made thicker and the film thickness gradually becomes thinner toward the outer periphery, which shows that the color of the front gradation colored film 10B and the back gradation colored film 30B gradually becomes lighter from the inner periphery toward the outer periphery. The colors of the front gradation colored film 10B, the back gradation colored film 30B, and the backing colored film 40B may be appropriately set according to the design of the timepiece dial 3B, just like in the first embodiment.

[0025] The timepiece dial 3B of this embodiment has three regions, namely a first region 61B, a second region 62B, and a third region 63B, from the center to the outer periphery when viewed in a plane, and each of these regions 61B to 63B has a different layer structure, which improves the design of the timepiece dial 3B. The first region 61B has a layered structure in which a front gradation colored film 10B is laminated on the front surface 21 of a light-transmitting substrate 20B made of mother-of-pearl, and a back gradation colored film 30B and a backing colored film 40B are laminated on the back surface 22. This makes it possible to realize a delicate design in which the changes in color shade due to the gradation coloring of the front gradation colored film 10B and the back gradation colored film 30B overlap with the coloring of the backing colored film 40B while making use of the mother-of-pearl pattern. The second region 62B has a layered structure in which the back gradation colored film 30B and the backing colored film 40B are laminated on the back surface 22 of the light-transmitting substrate 20B made of mother-of-pearl, so that a delicate design can be realized in which the changes in color tone due to the gradation coloring of the back gradation colored film 30B and the coloring of the backing colored film 40B are overlapped while making use of the mother-of-pearl pattern. The third region 63B has a layered structure in which a colored backing film 40B is formed on the rear surface 22 of a light-transmitting substrate 20B made of mother-of-pearl, and therefore a design can be realized in which the color of the colored backing film 40B is overlaid while making use of the mother-of-pearl pattern. As a result, the aesthetic appeal of the timepiece dial 3B can be improved.

[0026] [Third embodiment] A timepiece dial 3C of the third embodiment will be described with reference to FIG. 7 and FIG. The timepiece dial 3C is a flat rectangular dial, and includes a front gradation colored film 10C, a light-transmitting substrate 20C, and a rear gradation colored film 30C. The light-transmitting substrate 20C is made of a planar rectangular plate of light-transmitting synthetic resin such as polycarbonate.

[0027] The front gradation colored film 10C is formed by gradationally coloring the surface 21 of the light-transmitting substrate 20C with a surface coloring material by inkjet printing. In this embodiment, the front gradation colored film 10C is formed in a straight line extending in a direction connecting the indexes (not shown) of 12 o'clock and 6 o'clock on the timepiece dial 3C. The width dimension of the front gradation colored film 10C, i.e., the dimension in the 3 o'clock and 9 o'clock directions of the timepiece dial 3C, is constant, and in this embodiment, is approximately half the dimension from the central through hole 23 of the light-transmitting substrate 20C to the outer periphery in the 3 o'clock and 9 o'clock directions.

[0028] The back gradation colored film 30C is formed by gradationally coloring the back surface 22 of the light-transmitting substrate 20C with a back surface coloring material by inkjet printing. In this embodiment, the back gradation colored film 30C is formed in a straight line extending in the direction connecting the 12 o'clock and 6 o'clock indexes (not shown) of the timepiece dial 3C, similar to the front gradation colored film 10C. The width dimension of the back gradation colored film 30C, that is, the dimensions of the timepiece dial 3C in the 3 o'clock and 9 o'clock directions, is constant and is approximately 3 / 4 of the dimension from the through hole 23 in the center of the light-transmitting substrate 20C to the outer periphery in the 3 o'clock and 9 o'clock directions. For this reason, the width dimension of the back gradation colored film 30C is made larger than the width dimension of the front gradation colored film 10C. The front gradation colored film 10C and the back gradation colored film 30C are colored in a gradation that is dark at the center position connecting the 12 o'clock and 6 o'clock directions and becomes lighter toward the 3 o'clock and 9 o'clock directions. For this reason, in the cross-sectional view of Fig. 7, the front gradation colored film 10C and the back gradation colored film 30C have a large film thickness at the center portion connecting the 12 o'clock and 6 o'clock directions of the timepiece dial 3C, that is, the central portion passing through the through hole 23 of the light-transmitting substrate 20C, and the film thickness gradually becomes thinner toward the periphery in the 3 o'clock and 9 o'clock directions, which diagrammatically shows that the color of the front gradation colored film 10C and the back gradation colored film 30C gradually becomes lighter from the center toward the periphery.

[0029] The timepiece dial 3C of this embodiment has three areas, namely a first area 61C, a second area 62C, and a third area 63C, extending from the center connecting the 12 o'clock and 6 o'clock indexes toward the 3 o'clock and 9 o'clock sides when viewed in a plane, and each of these areas 61C to 63C has a different layer structure, which improves the design of the timepiece dial 3C. The first area 61C on the center side of the timepiece dial 3C has a layered structure in which a front gradation colored film 10C is laminated on the front surface 21 of the light-transmitting substrate 20C and a back gradation colored film 30C is laminated on the back surface 22, thereby realizing a delicate design in which changes in color shade due to the gradation coloring of the front gradation colored film 10C and the back gradation colored film 30C are overlapped. The second region 62C has a layered configuration in which the back gradation colored film 30C is laminated on the back surface 22 of the light-transmitting substrate 20C, so that a design in which the color shading is changed by the gradation coloring of the back gradation colored film 30C can be realized. The third region 63C can realize a design that makes the most of the light-transmitting substrate 20C. In addition, the third region 63C can improve light transmittance because the front gradation colored film 10C and the back gradation colored film 30C are not laminated. This can improve power generation efficiency, particularly when realizing a timepiece with a solar panel arranged on the back side of the timepiece dial 3C.

[0030] [Fourth embodiment] A timepiece dial 3D of the fourth embodiment will be described with reference to FIG. The timepiece dial 3D is a circular dial and includes a front gradation colored film 10D, a light-transmitting substrate 20D, a back gradation colored film 30D, a backing colored film 40D, and a base material 50D. The light-transmitting substrate 20D, the backing colored film 40D, and the base material 50D have the same configuration as in the first and second embodiments, so a description thereof will be omitted.

[0031] The front gradation colored film 10D is formed by applying gradation coloring to the surface of the light-transmitting substrate 20D with a surface coloring material by inkjet printing. In this embodiment, the front gradation colored film 10D is elliptical in plan view, the center of which is positioned at a position shifted toward the 3 o'clock direction from the through hole 23, and is colored in a gradation that is darkest on the 3 o'clock side and becomes lighter toward the 9 o'clock side. The back gradation colored film 30D is formed by gradationally coloring the back surface of the light-transmitting substrate 20D with a back surface coloring material by inkjet printing. In this embodiment, the back gradation colored film 30D is elliptical in plan view, the center of which is positioned at a position shifted toward the 9 o'clock direction from the through hole 23, and is colored in a gradation that is darkest on the 9 o'clock side and becomes lighter toward the 3 o'clock side.

[0032] FIG. 9, like the cross-sectional views of each of the above-described embodiments, shows a schematic representation in which the film thickness of the darker colored parts of the front gradation colored film 10D and the back gradation colored film 30D is made larger, and the film thickness is gradually reduced, so that the color gradually becomes lighter. Also, in the timepiece dial 3D of the fourth embodiment, the colors of the front gradation colored film 10D, the back gradation colored film 30D, and the backing colored film 40D may be appropriately set according to the design of the timepiece dial 3D, as in the previous embodiments.

[0033] In the timepiece dial 3D of the fourth embodiment, the front gradation colored film 10D and the back gradation colored film 30D overlap each other in a plan view at the center of the timepiece dial 3D, but do not overlap each other on the outer periphery. That is, the timepiece dial 3D has a first region 61D where the front gradation colored film 10D, the back gradation colored film 30D, and the backing colored film 40D overlap in a plan view, a second region 62D where the back gradation colored film 30D and the backing colored film 40D overlap in a plan view and the front gradation colored film 10D does not overlap, a third region 63D where the front gradation colored film 10D and the backing colored film 40D overlap in a plan view and the back gradation colored film 30D does not overlap, and a fourth region 64D where only the backing colored film 40D overlaps the light-transmitting substrate 20D, and the front gradation colored film 10D and the back gradation colored film 30D do not overlap. Since each of these areas 61D to 64D has a different layer structure, the design of the timepiece dial 3D can be improved.

[0034] [Variations] The configuration of the timepiece dial is not limited to the above-described embodiments. For example, each timepiece dial is not limited to having only the layer configuration described above, and a protective film, an anti-reflection film, etc. may be added to the surface of the light-transmitting substrate, that is, the surface on which the front gradation coloring film is formed. Also, the light-transmitting substrate is not limited to mother-of-pearl or polycarbonate, and may be made of any material having light-transmitting properties, as long as the back gradation coloring film affects the design of the timepiece dial through the light-transmitting substrate. The front gradation colored film and the back gradation colored film are not limited to those in which the color density changes continuously, but may be those in which the color density changes discontinuously, that is, in steps. The colored backing film may be formed by a single coating or printing so that the color density is uniform, but the entire surface of the colored backing film does not necessarily have to be a uniform color, and the color may vary in part depending on the design.

[0035] When a solar panel is disposed on the back surface of a timepiece dial, it is preferable not to provide a backing colored film and a substrate, as in the case of timepiece dial 3C, in order to increase the amount of light that reaches the solar panel. However, if the thickness of the backing colored film is reduced so that the amount of light required for power generation reaches the solar panel, a backing colored film may be provided. Also, if a transparent synthetic resin or the like is used as the substrate so that the amount of light required for power generation reaches the solar panel, a substrate may be provided, and further, both a backing colored film and a substrate may be provided.

[0036] In the timepiece dials 3, 3B, 3C, and 3D of each embodiment, the direction of the gradation color change may be reversed. For example, the timepiece dial 3 uses a gradation coloring in which the color is dark on the outer periphery and becomes lighter toward the inner periphery, but the opposite gradation coloring may be used, in which the color is dark on the inner periphery and becomes lighter toward the outer periphery. Similarly, the other timepiece dials 3B, 3C, and 3D may also have the gradation coloring set to the opposite direction. The timepiece dial 3, 3B uses gradation coloring in which the color changes in the radial direction of the light-transmitting substrate 20, 20B, but it may also use gradation coloring in which the color changes in the circumferential direction of the light-transmitting substrate 20, 20B. For example, the timepiece dial may be gradated so that the color is darkest at the 12 o'clock position and becomes lighter toward the 6 o'clock position via the 3 o'clock and 9 o'clock positions.

[0037] In the timepiece dial 3C, the front gradation colored film 10C and the back gradation colored film 30C are provided along the 12 o'clock and 6 o'clock directions, but this is not limited to this. That is, in various disc-shaped and rectangular timepiece dials, the front and back gradation colored films may be formed in a straight line, such as a vertical line connecting the 12 o'clock and 6 o'clock indexes, a horizontal line connecting the 3 o'clock and 9 o'clock indexes, or a diagonal line connecting the 2 o'clock and 8 o'clock indexes. In this case, two or more gradation colored films may be provided in a crossing direction. Furthermore, multiple front gradation colored films may be provided in parallel, and multiple back gradation colored films may be provided in parallel. In addition, when forming a linear gradation colored film, not only a gradation colored film whose color changes in a direction perpendicular to the extension direction of the gradation colored film, as in the timepiece dial 3C, but also a gradation colored film whose color changes in the extension direction may be used.

[0038] The front and back gradation colored films may be formed radially from the center of the plane of the timepiece dial toward the periphery. For example, a front gradation colored film may be formed in a sector shape with a central angle of 30 degrees in four directions of 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock on the timepiece dial, and a back gradation colored film may be formed in a sector shape with a central angle of 60 degrees in the same four directions. In this case, for example, the back gradation colored film is formed in the ranges of 11 o'clock to 1 o'clock, 2 o'clock to 4 o'clock, 5 o'clock to 7 o'clock, and 8 o'clock to 10 o'clock on the timepiece dial, the front gradation colored film is formed in a range of ±15 degrees from the four directions of 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock, and the gradation colored film is not formed in the ranges of 1 o'clock to 2 o'clock, 4 o'clock to 5 o'clock, 7 o'clock to 8 o'clock, and 10 o'clock to 11 o'clock, and for example, an area where the backing colored film is exposed is formed. In addition, each gradation colored film may be formed in a spiral shape, a star shape, a crescent shape, etc. in a plan view. Also, each gradation colored film may be formed in a different planar shape, for example, the front gradation colored film may be formed in a linear shape and the back gradation colored film may be formed in a circular shape. Furthermore, the backing colored film is not limited to being formed on the entire back surface of the light-transmitting substrate, and may be formed, for example, only in areas where the gradation colored films on the front and back are not formed, or only in areas where the gradation colored films on the front and back are formed. That is, the area, number, planar shape, color change direction, etc. of the front gradation colored film, rear gradation colored film, and backing colored film may be appropriately set according to the design of the timepiece dial. In particular, if each colored film is formed by inkjet printing, the area, number, planar shape, color change direction, etc. of each colored film can be freely designed, which increases the design freedom of the timepiece dial.

[0039] [Summary of this disclosure] The timepiece dial of the present disclosure comprises a translucent substrate, a front gradation colored film formed on the front surface of the translucent substrate by gradation coloring with a front coloring material, and a back gradation colored film formed on the back surface of the translucent substrate by gradation coloring with a back coloring material. According to the timepiece dial of the present disclosure, the front and back surfaces of the light-transmitting substrate are provided with gradation coloring, that is, a front gradation colored film and a back gradation colored film colored with a coloring material so that the color density changes continuously or stepwise, so that it is possible to form a portion in which the front gradation colored film is the main component in terms of design and a portion in which the back gradation colored film is the main component, so that delicate coloring and patterns can be formed, and the range of design expression of the timepiece dial can be expanded. Also, if a pattern is formed on the light-transmitting substrate, the aesthetic appeal of the timepiece dial can be improved by the synergistic effect of the pattern of the light-transmitting substrate and the gradation colored films on both the front and back sides sandwiching it.

[0040] The timepiece dial of the present disclosure may have, in a plan view seen from a direction perpendicular to the surface of the light-transmitting substrate, at least an area where the front gradation colored film and the back gradation colored film are overlapping, and an area where the back gradation colored film is provided and the front gradation colored film is not provided. According to the timepiece dial of the present disclosure, it is possible to form areas where the gradation colored films on the front and back are overlapped, and areas where only the back gradation colored film is provided, making it possible to express delicate designs that make use of changes in color and their shades.

[0041] In the timepiece dial of the present disclosure, in the plan view, the front gradation colored film may entirely overlap the back gradation colored film, and the back gradation colored film may have an area that overlaps with the front gradation colored film and an area that does not overlap with the front gradation colored film. According to the timepiece dial of the present disclosure, the entire area of ​​the front gradation colored film overlaps with a portion of the back gradation colored film, and the back gradation colored film can be formed over a larger area than the front gradation colored film, so the color of the front gradation colored film can be set based on the color of the back gradation colored film, and aesthetically pleasing color combinations can be easily set.

[0042] In the timepiece dial of the present disclosure, a backing colored film colored with a backing coloring material is formed on the back surface of the translucent substrate and the back surface of the back gradation colored film, and in a plan view seen from a direction perpendicular to the front surface of the translucent substrate, the front gradation colored film and the back gradation colored film are not provided, and there may be an area where the backing colored film is provided. According to the timepiece dial of the present disclosure, a backing color film is formed, so that a more delicate and complex design can be expressed by overlapping the front gradation color film or the back gradation color film with the backing color film. Also, since there is an area where only the backing color film is visible, a more complex design can be realized.

[0043] In the timepiece dial of the present disclosure, a backing colored film colored with a backing coloring material is formed on the back surface of the translucent substrate and the back surface of the back gradation colored film, and a substrate may be bonded to the back surface side of the backing colored film. According to the timepiece dial of the present disclosure, since it has a base material bonded to the back side of the backing color film, the strength of the timepiece dial can be increased. Also, since the base material is hidden by the backing color film, it is possible to prevent the metal or synthetic resin base material from being directly visible, and the design of the timepiece dial can be improved.

[0044] In the timepiece dial of the present disclosure, a through hole may be formed in the center of the plane of the translucent substrate, and the front gradation colored film and the back gradation colored film may be gradation colored in a concentric manner centered on the through hole and in a manner that the color becomes lighter from the outer periphery toward the center of the translucent substrate. The timepiece dial of the present disclosure has a gradation in which the color is darker on the outer periphery and lighter toward the center, making it possible to realize a design with a brighter center.

[0045] In the timepiece dial of the present disclosure, a through hole may be formed in the center of the plane of the translucent substrate, and the front gradation colored film and the back gradation colored film may be gradation colored in a concentric manner centered on the through hole and in a manner that the color becomes lighter from the center toward the periphery of the translucent substrate. The timepiece dial of the present disclosure has a gradation in which the color is darker toward the center and lighter toward the periphery, making it possible to realize a design with a brighter outer periphery.

[0046] In the timepiece dial of the present disclosure, the inner peripheral edge of the back gradation colored film may be located midway between the through hole of the translucent substrate and the outer peripheral edge of the translucent substrate, or may be located more inward than the midway position, and the inner peripheral edge of the front gradation colored film may be located more outward than the midway position. According to the timepiece dial of the present disclosure, the inner edge of the back gradation colored film is formed further into the light-transmitting substrate than the inner edge of the front gradation colored film, so that the timepiece dial can have an area on the center side of the plane where the gradation colored film on both the front and back sides is not provided, and outside of that an area where the back gradation colored film is provided can be formed, and outside of that an area where the gradation colored film on both the front and back sides is provided can be formed, making it possible to realize a design in which the color and its density change along the radial direction.

[0047] In the timepiece dial of the present disclosure, the back gradation colored film may be provided in a straight line with a constant width, and the front gradation colored film may be provided in a straight line with a constant width, the width of the front gradation colored film may be smaller than the width of the back gradation colored film, and the front gradation colored film may be provided so as to overlap with the front gradation colored film. The timepiece dial of the present disclosure makes it possible to realize a design with linear gradation coloring.

[0048] In the timepiece dial of the present disclosure, the back gradation colored film and the front gradation colored film are preferably formed by painting or inkjet printing. In the case of a circular watch dial, gradation coloring can be achieved by rotating a light-transmitting substrate on a rotating table and spraying paint from a spray gun. In addition, inkjet printing can be used to print not only circular watch dials, but also various other watch dials with different planar shapes, such as rectangular and elliptical.

[0049] In the timepiece dial of the present disclosure, the backing colored film is preferably formed by painting or inkjet printing. In the case of a circular timepiece dial, the colored backing film can be realized by rotating the light-transmitting substrate on a rotating table and discharging paint from a spray gun. In addition, with inkjet printing, the colored backing film can be printed not only on circular timepiece dials, but also on timepiece dials of various different planar shapes, such as rectangular and elliptical.

[0050] In the timepiece dial of the present disclosure, the light-transmitting substrate is preferably made of mother-of-pearl. By constructing the translucent substrate from mother-of-pearl, it is possible to provide a highly aesthetic watch dial that makes use of the natural patterns of the mother-of-pearl.

[0051] In the timepiece dial of the present disclosure, the translucent substrate can be a polycarbonate substrate. If the light-transmitting substrate is made of a polycarbonate substrate, the strength required for the timepiece dial can be ensured by the light-transmitting substrate itself. Therefore, since there is no need to provide a base material in addition to the light-transmitting substrate to increase its strength, a solar panel can be provided on the back side of the timepiece dial to generate electricity.

[0052] The timepiece of the present disclosure is characterized by including the timepiece dial described above. According to the timepiece of the present disclosure, the aesthetic appeal of the timepiece dial can be improved, and a timepiece with excellent design can be provided. [Explanation of symbols]

[0053] 1...watch, 2...outer case, 3...watch dial, 3B...watch dial, 3C...watch dial, 3D...watch dial, 4A...hour hand, 4B...minute hand, 4C...second hand, 5...index, 10...front gradation colored film, 10B...front gradation colored film, 10C...front gradation colored film, 10D...front gradation colored film, 20...light-transmitting substrate, 20B...light-transmitting substrate, 20C...light-transmitting substrate, 20D...light-transmitting substrate, 21...front surface, 22...back surface, 23...through hole, 30...back gradation colored film, 30 B...back gradation colored film, 30C...back gradation colored film, 30D...back gradation colored film, 40...backing colored film, 40B...backing colored film, 40D...backing colored film, 50...substrate, 50B...substrate, 51...surface, 53...through hole, 61...first region, 61B...first region, 61C...first region, 61D...first region, 62...second region, 62B...second region, 62C...second region, 62D...second region, 63...third region, 63B...third region, 63C...third region, 63D...third region, 64D...fourth region.

Claims

1. A light-transmitting substrate; a surface gradation colored film formed by gradationally coloring a surface coloring material on the surface of the light-transmitting substrate; a back gradation colored film formed by gradationally coloring a back surface of the light-transmitting substrate with a back surface coloring material; A clock face comprising:

2. The timepiece dial according to claim 1, When viewed from a direction perpendicular to the surface of the light-transmitting substrate, a region in which the front gradation colored film and the back gradation colored film are provided so as to overlap each other; A timepiece dial having at least an area where the back gradation colored film is provided and where the front gradation colored film is not provided.

3. The timepiece dial according to claim 2, In the plan view, the front gradation colored film entirely overlaps the back gradation colored film, The timepiece dial has an area where the back gradation colored film overlaps with the front gradation colored film and an area where the back gradation colored film does not overlap with the front gradation colored film.

4. The timepiece dial according to claim 1, a backing colored film colored with a backing coloring material is formed on the back surface of the light-transmitting substrate and the back surface of the backing gradation colored film; A timepiece dial having an area where the front gradation colored film and the back gradation colored film are not provided and the backing colored film is provided, when viewed in a plan view from a direction perpendicular to the surface of the light-transmitting substrate.

5. The timepiece dial according to claim 1, a backing colored film colored with a backing coloring material is formed on the back surface of the light-transmitting substrate and the back surface of the backing gradation colored film; A timepiece dial having a substrate bonded to the back side of the backing color film.

6. The timepiece dial according to claim 1, A through hole is formed in the center of the plane of the light-transmitting substrate, The front gradation colored film and the back gradation colored film are colored concentrically around the through hole and in a gradation manner such that the color becomes lighter from the outer periphery toward the center of the light-transmitting substrate.

7. The timepiece dial according to claim 1, A through hole is formed in the center of the plane of the light-transmitting substrate, The front gradation colored film and the back gradation colored film are colored concentrically around the through hole and in a gradation manner such that the color becomes lighter from the center to the outer periphery of the light-transmitting substrate.

8. In the timepiece dial according to claim 6 or 7, an inner peripheral edge of the back gradation colored film is located at a midpoint between the through hole of the light-transmitting substrate and an outer peripheral edge of the light-transmitting substrate, or is located on the inside of the midpoint; A timepiece dial in which the inner peripheral edge of the front gradation colored film is located outside the intermediate position.

9. The timepiece dial according to claim 1, The back gradation colored film is provided linearly with a constant width, The surface gradation colored film is provided linearly with a constant width, The width of the front gradation colored film is smaller than the width of the back gradation colored film, and the front gradation colored film and the back gradation colored film are overlapped with each other.

10. The timepiece dial according to claim 1, The back gradation colored film and the front gradation colored film are formed on the timepiece dial by painting or inkjet printing.

11. In the timepiece dial according to claim 4 or 5, The backing color film is formed on the timepiece dial by painting or inkjet printing.

12. The timepiece dial according to claim 1, The timepiece dial, wherein the light-transmitting substrate is made of mother-of-pearl.

13. The timepiece dial according to claim 1, The timepiece dial, wherein the light-transmitting substrate is a substrate made of polycarbonate.

14. A timepiece comprising the timepiece dial according to claim 1.

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