JP2008164366A - Dial for solar timepiece, and solar timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dial for a solar timepiece made of material having electric wave transmission capability and optical transparency, and capable of materializing color tone having more restrained gloss and a profound depth than conventional ones, and the solar timepiece. <P>SOLUTION: The dial is provided with a board-like substrate 112a having the optical transparency. In the surface of this substrate 112a a groove 120a capable of diffusing light is formed, and on this groove 120a a paint film 121 with a film thickness of 20 μm or more having optical transparency is formed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dial for a solar timepiece having light transparency and a solar timepiece.

  In general, a watch (especially a wristwatch) has a function as a decorative item in addition to a function of displaying time, and its design is extremely important. For this reason, various ingenuity has been tried for the timepiece dial that can be visually perceived in order to express a high-quality and high-quality appearance from the appearance. As a result, the dial using the metal plate can be given a moist luster and deep color.

  On the other hand, in recent years, it is equipped with a radio wave correction function that receives standard radio waves and displays accurate time, and its power source is a solar radio timepiece that does not require a battery to drive light energy such as sunlight instead of electric energy. Has been developed and distributed in the market. The dial used in this solar radio timepiece is composed of a base material constituting the main body and a coating film formed on the surface of the base material. The resin material which has is used. This resin material is often used in a white or light color tone that gives a higher-class feeling than black. Further, a geometric basis weight (fine unevenness) pattern capable of diffusing light is formed on the surface of the base material (see, for example, Patent Document 1), and a resin material is obtained by the light diffusion effect. The design of the watch as a whole is impaired by reducing the unique glare (luxury and lack of luxury) and the power generation solar cell on the back of the dial. Is preventing.

Moreover, the coating film mentioned above is formed in the coating film thickness by about 10 micrometers with the high temperature thermosetting coating material. As a result, the glaring sensation is eased and gloss and depth are brought out. This film thickness is set to about 10 μm when a paint having a high temperature thermosetting property (which is cured by heat of about 100 ° C.) is applied, and when the film thickness is 10 μm or more, the dial (base material) ) May be distorted by heat.
JP-A-8-15454

  However, with the above-mentioned basis weight pattern and a coating layer having a thickness of about 10 μm, it was not possible to sufficiently cancel out the unique glare of the resin base material. For this reason, compared to metal dials, the sense of luster and deep color is lacking in luxury.

  The present invention has been made in view of the above-described circumstances, and is a material having radio wave and light permeability, and can be used for a solar watch capable of realizing a glossy and deep color tone as compared with the prior art. An object is to provide a dial and a solar clock.

The dial for a solar timepiece according to the present invention includes a plate-shaped base material having light transmittance, and a groove portion capable of diffusing light is formed on the surface of the base material. On the groove portion, the film thickness is 20 μm. A coating film having the above light transmittance is formed.
A smooth surface can also be formed on the surface of the coating film by mirror polishing.
According to this configuration, a moist and deep color can be obtained by suppressing the glare as compared with a conventional dial.

In the dial for a solar timepiece, the coating film may be formed in one layer using a low-temperature thermosetting paint.
According to this configuration, it is possible to form a coating film having a thickness of 10 μm or more in a single layer, which cannot be realized unless the conventional high-temperature thermosetting paint is applied in layers. That is, it is possible to form a coating film having a sufficient thickness so as to obtain an effect such as suppressing the feeling of glare by a single coating process.

Furthermore, in the dial for solar timepiece, the base material may be formed of a resin material.
According to this configuration, the dial can be manufactured at a lower cost.

Furthermore, in the dial for solar timepiece, it is preferable that the film thickness of the coating film is 250 μm or less.
According to this configuration, the maximum coating thickness that forms one layer with a low-temperature thermosetting paint and the maximum coating thickness that allows light to pass through is 250 μm or less. It is possible to minimize the glare.

On the other hand, in the dial for a solar timepiece, a groove portion capable of diffusing light can be formed on the surface of the coating film.
According to this configuration, moist whiteness (whiteness obtained by blurring the coating surface) is increased by increasing the light diffusion effect on the surface of the coating film. For this reason, when a light-colored base material is used, higher-grade whiteness can be realized as compared with the case where a groove portion is formed only on the base material.

In the dial for a solar timepiece, a metal vapor-deposited layer capable of transmitting light may be formed on the surface of the coating film.
According to this configuration, the light diffusion effect is further increased by the metal deposition layer, and a moist whiteness and a high-class feeling can be realized.

Further, in the dial for a solar timepiece, a second groove portion capable of diffusing light is formed on the back surface of the base material, and a second coating film having light transmittance is formed on the second groove portion. You can also
Furthermore, in the dial for solar timepiece, the film thickness of the second coating film can be formed to 20 μm or more.
Furthermore, in the dial for solar timepiece, a smooth surface may be formed on the surface of the second coating film by mirror polishing.
According to this configuration, a glossy or deep color can be realized in cooperation with any of the coating film of 20 μm or more on the surface of the base material, the groove on the surface of the coating film, or the metal vapor deposition film.

Furthermore, in the dial for a solar timepiece, a groove portion capable of diffusing light may be formed on the surface of the second coating film.
According to this configuration, the moist whiteness is further increased by increasing the light diffusion effect on the surface of the second coating film. For this reason, when a light-colored base material is used, it is possible to achieve a more luxurious whiteness.

On the other hand, the solar timepiece according to the present invention includes a movement and a dial plate in which a light-transmitting coating film having a film thickness of 20 μm or more is formed on the surface of a light-transmitting plate-shaped substrate. And
In the solar timepiece, the surface of the coating film may be formed into a smooth surface by mirror polishing.
According to this configuration, it is possible to obtain a solar timepiece having a moist gloss and deep color by suppressing the glare as compared with the conventional dial.

Further, the movement may be configured to receive a radio wave and correct the time.
According to this configuration, it is possible to suppress a feeling of glare and obtain a moist and deep color with respect to a dial for a solar radio timepiece that receives radio waves.

(First embodiment)
Hereinafter, a dial for a solar radio timepiece according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a solar radio timepiece according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II in FIG. In addition, description of directions, such as an up-down direction, a left-right direction, and a front-back direction, described in the first embodiment is a direction when viewed with reference to FIG.

  The solar radio timepiece 1 (hereinafter referred to as “timepiece 1”) receives a standard radio wave from the outside, corrects the display time based on the received standard radio wave, converts light energy into electric energy by a solar cell, and supplies power. It is intended to be used as In the present embodiment, as shown in FIGS. 1 and 2, the timepiece 1 is configured as a wristwatch type that can be worn on the user's arm and carried. In addition, this embodiment is an example and can be applied not only to a wristwatch type but also to a wall clock, a desktop clock, and the like.

  As shown in FIG. 1, the timepiece 1 includes a casing 11 that forms the outer portion of the timepiece 1, a glass member 12 that forms a surface portion of the timepiece 1, and a pointer 13 that is positioned on the back side of the glass member 12. And a movement 14 (FIG. 2), an antenna 15 (FIG. 2), a solar cell 17, and a mounting band 16 housed inside the housing 11.

As shown in FIG. 2, the housing 11 further includes a body member 111 that constitutes a side portion of the timepiece 1, a dial 112 that is disposed so as to be visible from the glass member 12, and an opening portion on the back surface of the timepiece 1. It is comprised with the cover member 113 attached so that it might block.
The body member 111 is made of, for example, stainless steel, titanium, aluminum, brass (brass), gold, or platinum. The body member 111 includes a body member main body 111A and glass as shown in FIG. And an edge 111B. The body member main body 111A is formed in a cylindrical shape having openings on the upper surface and the lower surface, and the engagement portion for engaging with the lid member 113 is recessed on the inner side surface of the opening portion on the lower surface inside the inner surface. 111A1 is formed. The glass edge 111B has an annular shape, is fitted into an opening portion on the upper surface of the body member main body 111A, and the glass member 12 is fixed on the upper surface.
The lid member 113 can be made of, for example, stainless steel, titanium, aluminum, brass (brass), gold, platinum, or the like, similar to the body member 111 described above.

  The dial 112 includes a base material 112a (see FIGS. 3 and 4) and a coating film 121 (see FIG. 4) which will be described in detail later. As shown in FIG. 2, the dial 112 is located inside the trunk member main body 111 </ b> A, and is disposed in the middle portion in the thickness direction of the trunk member main body 111 </ b> A. On the surface side of the dial 112, for example, a 12-hour scale 112c indicating the display position of the pointer 13 is provided as shown in FIG. The dial 112 is made of a light-transmitting material so that light can be supplied to the solar cell 17 located on the back side of the dial 112. As the material of the base material 112a in the first embodiment, polycarbonate is used, and a white tone color excellent in light transmittance is selected.

  Other materials for polycarbonate include polyolefins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), cyclic polyolefin, modified polyolefin, polyvinyl chloride, polyvinylidene chloride, polystyrene. , Polyamide (eg, nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6-12, nylon 6-66), polyimide, polyamideimide, poly- (4-methylpentene- 1), ionomer, acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polymer Polyester such as oxymethylene, polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT), polyether, polyether ketone ( PEK), polyether ether ketone (PEEK), polyether imide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, polyether sulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetra Fluoroethylene, polyvinylidene fluoride, other fluororesins, styrene, polyolefin, polyvinyl chloride, polyurethane , Polyester, polyamide, polybutadiene, trans polyisoprene, fluoro rubber, chlorinated polyethylene, and other thermoplastic elastomers, epoxy resins, phenol resins, urea resins, melamine resins, unsaturated polyesters, silicone resins, Urethane resin, poly-para-xylylene, poly-monochloro-para-xylylene, poly-dichloro-para-xylylene, polymonofluoropara Polyparaxylylene resins such as xylylene (poly-monofluoro-para-xylylene), poly-monoethyl-para-xylylene, etc., or copolymers, blends, and polymers mainly containing these Alloys and the like are listed, and one or more of these are combined (for example, blend resin Polymer alloy, as a laminate or the like) can be used.

  Among these materials, it is particularly preferable that the material is composed of a material containing at least one selected from polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS resin). Polycarbonate is relatively inexpensive among various plastic materials, and can contribute to further reduction in the production cost of the dial 112.

  The lid member 113 is attached so as to close the opening on the lower surface of the trunk member main body 111A. More specifically, a hook portion 113B that protrudes from the peripheral portion of the lid member 113 toward the front surface side is provided, and after the packing 113C is interposed therebetween, the hook portion 113B is engaged with the engaging portion of the trunk member main body 111A. It is attached by engaging with 111A1. The lid member 113 can be made of, for example, stainless steel, titanium, aluminum, brass (brass), gold, platinum, or the like, similar to the body member 111 described above.

The glass member 12 is placed and fixed on the upper surface of the glass edge 111 </ b> B of the body member 111, and closes the opening portion on the upper surface of the body member 111. As a result, a storage space for the pointer 13 is formed between the glass member 12 and the dial 112. The glass member 12 can be made of, for example, inorganic glass (sapphire, silicon oxide, etc.) or organic glass (plastic, etc.).
The pointer 13 is disposed in a storage space between the glass member 12 and the dial 112, and is for displaying the time to the user. As shown in FIG. 1 or 2, the pointer 13 includes an hour hand 131, a minute hand 132, and a second hand 133 that are rotatably supported on the dial 112. In addition, it can also be comprised by generally known arrangement | positioning, such as not providing the second hand 133, or providing the pointer | guide displayed in units of 24 hours separately. Furthermore, a guideline for displaying the date and the week can be provided.

As shown in FIG. 2, the movement 14, the antenna 15, and the solar cell 17 are installed in a storage space 114 formed between the dial 112 and the lid member 113.
The movement 14 includes a motor (not shown), and the hour hand 131, the minute hand 132, and the second hand 133 of the pointer 13 are driven by controlling the motor. The motor uses electric energy converted from light energy by the solar cell 17. Specifically, the electrical energy generated by the solar cell 17 is stored by a storage battery (not shown), and this storage battery is used as a power source.

  The antenna 15 is configured by winding a coil 152 around a magnetic core 151 (antenna core). As shown in FIGS. 1 and 2, the antenna 15 is disposed on the left side of the storage space 114, and controls the reception operation of the standard radio wave from the outside. The antenna 15 is configured to be able to switch the frequency of the radio wave to be received. For example, in Japan, long-wave standard radio wave transmission (frequency: 40 kHz, frequency: 60 kHz, two types of frequencies) is switched and received. It is configured to be able to. It is also possible to switch between US standard radio waves (frequency: 60 kHz) and German standard radio waves (frequency: 77.5 kHz) for reception. In addition, since the required structure and method for correcting time use the well-known technique, detailed description is omitted.

  The solar cell 17 is disposed over almost the entire back surface of the dial 112, and can transmit light transmitted from the entire surface of the dial 112 into electrical energy. The solar cell 17 has a color of black tone as a general product. When the base material 112a (see FIGS. 3 and 4) of the dial 112 is white or light, the dial 112 It is easy to see through.

FIG. 3A to FIG. 3C are schematic views of the basis weight pattern formed on the surface of the base material 112 a of the dial 112.
On the surface of the base material 112a formed in a disc shape, as shown in FIG. 3 (a), a weighting pattern 120a (groove portion) extending linearly in the groove in the vertical direction is formed. The basis weight pattern 120a has a groove depth of about 30 μm to 50 μm and an adjacent pitch of about 50 μm to 150 μm. As a result, when the user of the watch 1 looks at the dial 112 from the front, the light passing through the portion of the basis weight pattern 120a hits the groove and diffuses (diffuse reflection), so that the whiteness (surface is blurred). Whiteness) will increase. Further, by increasing the whiteness, the black color of the solar cell 17 located on the back side of the dial 112 can be made inconspicuous.

Further, the basis weight pattern may be a radial pattern 120b as shown in FIG. In detail, the radial pattern 120b is formed by a single groove, and the radial pattern 120b is formed by proceeding in the circumferential direction while meandering the central portion and the outer edge portion of the dial 112. ing.
Further, the basis pattern may be a spiral pattern 120c as shown in FIG. Specifically, the spiral pattern 120c is formed by one groove, and the spiral pattern 120c is formed by proceeding outward in a spiral form from the center like a so-called record groove. Has been.
Furthermore, even if it is a pattern other than the patterns described above, any pattern can be appropriately selected as long as it is a pattern in which grooves can be easily formed in the base material 112a and a light diffusion effect can be obtained.

FIG. 4 is an enlarged cross-sectional view showing an A portion shown in FIG.
A transparent or lightly colored coating film 121 is formed on the surface of the base material 112a on the basis pattern 120a. The coating film 121 can use a thermosetting or ultraviolet curable coating, and particularly includes a low-temperature thermosetting coating (for example, Magdyne PL-C (Nippon Paint: N-DACS21)). ) Is used. This low-temperature thermosetting paint is characterized by being cured when a temperature of about 60 degrees is applied (high-temperature thermosetting paint is cured when heat of about 100 degrees or more is applied). Even if it is formed to have a thickness of about 250 μm, the base material 112a is not distorted by heat.

  The coating film 121 is formed with a film thickness of about 200 μm. In addition, the film thickness of this coating film shall mean the thickness from the bottom part of the groove | channel of the fabric weight 120a to the surface of the coating film 121. FIG. A smooth surface 122 is formed on the upper surface of the coating film 121 by performing a mirror polishing process (polishing allowance: about 100 μm). That is, the film thickness after polishing of the coating film 121 is ensured to be at least 50 μm. If the film thickness is at least 20 μm or more, the glare of the base material 112a can be relieved compared with the conventional one visually, and a moist glossy and deep color can be obtained. .

The film thickness of about 200 μm before polishing can be formed in one layer by one coating by using the low-temperature thermosetting paint described above. It should be noted that the thickness of the coating film 121 before polishing without causing the substrate 112a to be distorted by heat is 250 μm at the maximum.
That is, in the conventional thermosetting paint, it was not cured unless heat of 100 ° C. or more was applied, so that only a film thickness of about 10 μm could be formed by one coating. For this reason, in order to form a film thickness of about 200 μm, it is necessary to simply calculate and repeatedly apply about 20 coatings, resulting in a significant increase in manufacturing cost. Therefore, it is difficult to realize a 200 μm coating film.

  A coating film 115 for adjusting the hue and light transmittance of the dial 112 is formed on the back surface of the dial 112.

According to the solar radio timepiece dial 112 according to the first embodiment of the present invention, by using a resin material, particularly polycarbonate, as the material of the base material 112a, the radio wave and light transmission can be improved. it can. Moreover, since it is an inexpensive material, the material cost of the dial 112 can be reduced.
Moreover, since the material of a white or light color tone is used, light transmittance can further be improved.

Further, since the basis weight pattern 120a (120b, 120c) is formed on the surface of the base material 112a and the coating film 121 is formed on the basis weight pattern 120a, the light strikes the basis weight pattern 120a and diffuses (diffuse reflection). Thus, when the surface of the dial 112 is viewed from the outside, moist whiteness can be produced. Furthermore, the black color of the solar cell 17 located on the back side of the dial 112 can be made inconspicuous.
Further, since the smooth surface 122 is formed on the upper surface of the coating film 121 by mirror polishing, the design property is not impaired by the curved surface shape of the surface of the coating film 121 undulating. Can do. Further, by forming the smooth surface 122, a higher-class feeling can be obtained.

Further, since the film thickness of the coating film 121 before polishing is 200 μm (at least 250 μm or less) and the minimum film thickness after polishing of the coating film 121 is 50 μm (at least 20 μm or more), the conventional film thickness (about 10 μm) Compared to the above, it is possible to relieve the glare of the base material 112a, and it is possible to obtain a deep, moist and glossy color tone that is difficult to realize.
On the other hand, by forming the coating film 121 as a single layer using a low-temperature thermosetting coating material, the coating film 121 can be formed in a single coating process even if the coating film of 10 μm or more is not repeatedly stacked. Can be obtained. Therefore, the coating cost does not increase.

  In addition, according to the configuration of the first embodiment, the solar cell 17 located on the back side of the dial 112 is difficult to see through from the surface side of the dial 112, while the solar cell 17 is sufficient for power generation. Light is transmitted through the dial 112. As a result, it is possible to secure a sufficient amount of power generation and to create a variety of design expressions, to create high-quality patterns, textures, and color variations, and to increase the degree of freedom in selecting these colors. it can. As a result, it is possible to provide a dial and timepiece having improved appearance quality and excellent merchantability.

Although the first embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention.
For example, the base material 112a of the dial 112 uses a resin material having high radio wave and light transmission properties, particularly polycarbonate, but any material having radio wave and light transmission properties can be selected as appropriate. For example, a glass material may be used.

(Second Embodiment)
A solar radio timepiece dial 212 according to the second embodiment of the present invention will be described in detail with reference to FIG. In FIG. 5, the same reference numerals are used for the same components as those used in the first embodiment.
In the second embodiment, the process is the same until the coating film 121 in the first embodiment is formed and the smooth surface 122 is formed on the upper surface of the coating film 121. In the second embodiment, the basis weight pattern 220 (groove portion) is further formed on the surface of the smooth surface 122. The basis weight pattern 220 of the new coating film 221 is formed with a depth of about 10 to 30 μm and a pitch of about 10 to 30 μm. For example, as shown in FIG. 3, the basis weight pattern 120 a formed on the base material 112 a of the dial 112 is formed. (Straight line extending in the vertical direction), 120b (straight line extending in the radial direction from the center), 120c (a spiral curve like a record groove) can be used.

The light passing through the basis weight pattern 220 hits the groove and diffuses (diffuse reflection). Therefore, when the user of the timepiece 1 looks at the dial 212 from the front, the dial 212 brings on a more moist whiteness. Further, by providing this whiteness, the black color of the solar cell 17 located on the back side of the dial 212 can be made inconspicuous.
Even if the basis weight pattern 220 is formed, the minimum film thickness of the coating film 122 is 20 μm, and a film thickness of 20 μm or more can be secured.

  According to the solar radio timepiece dial 212 according to the second embodiment of the present invention, since the basis weight pattern 220 is formed on the surface of the smooth surface 122, the light diffusion effect is increased on the surface of the coating film 221. To do. Thereby, moist white is increased as compared with the base material 112a according to the first embodiment in which the basis weight pattern 120a is formed. In particular, when the light-colored base material 112a is used, a more luxurious whiteness can be realized. Further, even if the present configuration is applied to the black-tone base material 112a, the surface of the dial 212 can be moistened by the diffusion of light, and the sense of quality is further increased.

Although the second embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention.
For example, in the second embodiment, the basis weight pattern 220 is formed on the surface of the smooth surface 122, but the basis weight pattern 220 may be formed without processing the smooth surface 122. Thereby, when a uniform smooth surface can be obtained by the process of forming the coating film 221, the work process of forming the smooth surface 122 by mirror polishing can be reduced, and the manufacturing cost can be reduced.

(Third embodiment)
A solar radio timepiece dial 312 according to a third embodiment of the present invention will be described in detail with reference to FIG. In FIG. 6, the same reference numerals are used for the same parts as those used in the first and second embodiments.
In the third embodiment, the process is the same until the coating film 221 having the basis weight pattern 220 in the second embodiment is formed. In the third embodiment, the metal vapor deposition layer 322 is formed on the upper surface of the basis weight pattern 220. The metal vapor deposition layer 322 has a thickness that does not hinder the transmission of light, and is formed to a thickness of about 700 angstroms. The light passing through the metal deposition layer 322 strikes the metal portion in the layer and diffuses (diffuse reflection), thereby producing a more moist whiteness and the solar cell 17 located on the back side of the dial 312. Black can be made inconspicuous.

According to the solar radio timepiece dial 312 according to the third embodiment of the present invention, since the metal diffusion film 322 can be formed to further increase the light diffusion effect, the second embodiment. The moist whiteness will increase even more than the ones. In particular, when the light-colored base material 112a is used, it is possible to achieve a more luxurious whiteness. Further, even if the present configuration is applied to the black-tone base material 112a, the surface of the dial 312 can be moistened by the diffusion of light, and the sense of quality is further increased.
In addition, since the metal vapor deposition film 322 is formed, it is possible to give a metallic luster that was difficult to express by painting alone, and to obtain a higher quality feeling.

(Fourth embodiment)
A solar radio timepiece dial 412 according to a fourth embodiment of the present invention will be described in detail with reference to FIG. In FIG. 7, the same reference numerals are used for the same components as those used in the first, second, and third embodiments.
In the fourth embodiment, the process is the same until the coating film 121 in the first embodiment is formed and the smooth surface 122 is formed on the upper surface of the coating film 121. In the fourth embodiment, a weight pattern 420a (second groove) similar to the front surface is formed on the back surface of the base material 412a of the dial 412, and a coating film 423 is formed on the weight pattern 420a. The smooth surface 424 is formed on the surface of the coating film 423 by mirror polishing. The basis pattern 420a is formed with a depth of about 10 to 30 μm and a pitch of about 10 to 30 μm. For example, as shown in FIG. 3, the basis pattern 120a (in the vertical direction) formed on the surface of the base 112a of the dial 112 is formed. The pattern can have the same shape as 120b (straight line extending in the radial direction from the center) and 120c (a spiral curve like a record groove).

This coating film 423 is the same as the coating film 121 in the first embodiment, and the film thickness before mirror polishing is about 200 μm, the polishing margin is about 100 μm, and the film thickness after polishing is at least 50 μm or more. Yes. In addition, a low-temperature thermosetting paint is also used for the paint, and the coating film 423 can be formed in one layer by one coating as in the first embodiment.
A coating film 415 for adjusting the hue and transmittance of the dial 412 is formed on the lower surface of the dial 412 on the surface of the coating film 423.

According to the dial 412 for solar radio timepiece according to the fourth embodiment of the present invention, since the basis weight pattern 420a is formed on the back surface of the base material 412a, compared with that of the first embodiment, Furthermore, the light diffusion effect can be increased. Further, the black color of the solar cell 17 located on the back side of the dial 412 can be made inconspicuous.
Moreover, since the coating films 121 and 423 are provided on both surfaces of the base material 412a, light passes through the two coating films 121 and 423, and the glare of the base material 412a is compared with the first embodiment. A feeling of touch can be further eased, and a deep and moist luster and color tone can be obtained.

  Further, by forming the smooth surface 424, it is possible to prevent the designability from being impaired by the curved surface shape in which the surface of the coating film 423 is waved. Further, by forming the smooth surface 424, a higher quality feeling can be obtained.

Although the second embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention.
For example, only the coating film may be formed without providing the basis weight pattern 420a. According to this configuration, by forming two coating films, it is possible to relieve the glaring feeling of the base material and to obtain a deep and moist luster and color tone.

(Fifth embodiment)
A solar radio timepiece dial 512 according to a fifth embodiment of the present invention will be described in detail with reference to FIG. In FIG. 8, the same reference numerals are used for the same components as those used in the first, second, third, and fourth embodiments.
In the fifth embodiment, the process is the same until the coating film 221 in the second embodiment is formed and the basis pattern 220 is formed on the surface thereof. Moreover, the place where the coating film 423 and the smooth surface 424 are formed on the back surface of the base material 412a in the fourth embodiment is also the same. In the fifth embodiment, a new coating film 525 in which the basis pattern 526 (groove portion) is formed on the surface of the smooth surface 424 is formed. The basis pattern 526 is formed with a depth of about 10 to 30 μm and a pitch of about 10 to 30 μm. For example, as shown in FIG. 3, a basis pattern 120 a (in the vertical direction) formed on the surface of the base material 112 a of the dial 112. The pattern can have the same shape as 120b (straight line extending in the radial direction from the center) and 120c (a spiral curve like a record groove).

The light passing through the portion of the basis weight pattern 526 strikes the groove and diffuses (diffuse reflection). Therefore, when the user of the timepiece 1 looks at the dial 512 from the front, the dial 512 brings on a moist whiteness. Moreover, by giving this whiteness, the black color of the solar cell 17 located on the back side of the dial 512 can be made inconspicuous.
Even if the basis weight pattern 220 is formed, the minimum film thickness of the coating film 423 is 20 μm, and a film thickness of 20 μm or more can be secured.
A coating film 515 for adjusting the hue and transmittance of the dial 512 is formed on the lower surface of the dial 512 on the surface of the coating film 525.

  According to the solar radio timepiece dial 512 according to the fifth embodiment of the present invention, since the basis weight pattern 526 is formed on the surface of the smooth surface 424, the light diffusion effect is increased on the surface of the coating film 525. To do. Thereby, moist white is increased as compared with the second embodiment or the fourth embodiment. In particular, when a light-colored base material 412a is used, it is possible to realize a more luxurious whiteness. Further, even when this configuration is applied to the black-tone base material 412a, the surface of the dial 512 can be moistened by the diffusion of light, and the sense of quality can be further increased.

Although the fifth embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made based on the technical idea of the present invention.
For example, in the fifth embodiment, the basis pattern 526 is formed on the surface of the smooth surface 424, but the basis pattern 526 can be formed without processing the smooth surface 424. Thereby, when a uniform smooth surface can be obtained by the process of forming the coating film 521, the work process of forming the smooth surface 424 by mirror polishing can be reduced, and the manufacturing cost can be reduced.

(Sixth embodiment)
A dial 612 for a solar radio timepiece according to a sixth embodiment of the present invention will be described in detail with reference to FIG. In FIG. 9, the same reference numerals are used for the same components as those used in the first, second, third, fourth, and fifth embodiments.
In the sixth embodiment, the third embodiment and the fifth embodiment are combined. In other words, the coating film 221 with the basis weight pattern 220 is formed on the surface of the base material 412a, and the metal vapor deposition layer 322 is formed on the top surface of the basis weight pattern 220, while the basis weight pattern 526 is formed on the back surface of the base material 412a. The coating film 525 in which is formed is formed.

  According to the solar radio timepiece dial 612 according to the sixth embodiment of the present invention, it is possible to obtain an effect obtained by adding the effects of the third embodiment and the effects of the fifth embodiment. it can. That is, since the light diffusion effect can be increased, moist whiteness can be produced. In particular, when the light-colored base material 412a is used, a more luxurious whiteness is realized. be able to. Further, even when this configuration is applied to the black-tone base material 412a, the surface of the dial 512 can be moistened by the diffusion of light, and the sense of quality can be further increased.

(Modifications in the first to sixth embodiments)
Although the first to sixth embodiments have been described, the configurations in the first to sixth embodiments can be applied to the dial portion or a combination of these portions. For example, referring briefly to FIG. 1, the configuration of the first embodiment is adopted at the center of the dial 112, and the configuration of the second embodiment is adopted at the circular edge of the dial 112. It can also be adopted. According to this configuration, the central portion of the dial 112 has a moist gloss, and the edge of the dial 112 can obtain a color tone that is whiter than the central portion. Of course, it is also possible to reverse these application portions to increase the whiteness of the central portion and to give the edge a moist luster. Thereby, the design and decoration of the entire dial 112 can be improved, and a high-class feeling can be enhanced by a synergistic effect.

  Moreover, although the solar radio timepiece has been described in the first to sixth embodiments, it can also be applied to a solar timepiece that does not have a time correction function.

1 is a front view of a solar radio timepiece according to a first embodiment of the present invention. It is sectional drawing cut | disconnected by the II-II line | wire of FIG. It is a schematic diagram of the basis weight pattern formed on the dial. It is an expanded sectional view of the A section shown in Drawing 2 concerning a 1st embodiment of the present invention. It is an expanded sectional view which shows the 2nd Embodiment of this invention corresponding to FIG. It is an expanded sectional view which shows the 3rd Embodiment of this invention corresponding to FIG. It is an expanded sectional view which shows the 4th Embodiment of this invention corresponding to FIG. It is an expanded sectional view which shows the 5th Embodiment of this invention corresponding to FIG. FIG. 7 is an enlarged cross-sectional view showing a sixth embodiment of the present invention corresponding to FIG. 6.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Solar radio timepiece (clock), 11 ... Housing, 12 ... Glass member, 13 ... Pointer, 14 ... Movement, 15 ... Antenna, 16 ... Band for mounting, 17 ... Solar cell, 111 ... Body member, 111A ... Body Member main body, 111A1 ... engaging portion, 111B ... glass edge, 112, 212, 312, 412, 512, 612 ... dial, 112a, 412a ... base material, 113 ... lid member, 113B ... hook portion, 113C ... packing, 114: Storage space, 115, 415, 515 ... Painted film, 120a, 120b, 120c ... Basis pattern, 121 ... Coating film, 122 ... Smooth surface, 131 ... Hour hand, 132 ... Minute hand, 133 ... Second hand, 151 ... Magnetic core (Antenna core), 152 ... coil, 220 ... basis weight pattern, 221 ... coating film, 322 ... metal deposition layer, 420a ... basis weight pattern, 423 ... coating , 424 ... smooth surface.

Claims (14)

  A plate-shaped base material having light permeability is provided, and a groove portion capable of diffusing light is formed on the surface of the base material, while a coating film having a light transmittance of 20 μm or more is formed on the groove portion. A solar watch dial characterized by the fact that   The dial for a solar timepiece according to claim 1, wherein a smooth surface is formed on the surface of the coating film by mirror polishing.   The dial for solar timepiece according to claim 1 or 2, wherein the coating film is formed of one layer using a low-temperature thermosetting paint.   The dial for a solar timepiece according to any one of claims 1 to 3, wherein the base material is formed of a resin material.   The solar timepiece dial according to any one of claims 1 to 4, wherein the coating film has a thickness of 250 µm or less.   The dial for a solar timepiece according to any one of claims 2 to 5, wherein a groove portion capable of diffusing light is formed on a surface of the coating film.   The dial for solar timepiece according to any one of claims 2 to 6, wherein a metal vapor-deposited layer capable of transmitting light is formed on the surface of the coating film.   2. A second groove part capable of diffusing light is formed on the back surface of the base material, and a second coating film having light permeability is formed on the second groove part. A dial for a solar timepiece according to any one of claims 7 to 9.   The dial for a solar timepiece according to claim 8, wherein the film thickness of the second coating film is 20 μm or more.   The dial for a solar timepiece according to claim 8 or 9, wherein a smooth surface is formed on the surface of the second coating film by mirror polishing.   The dial for a solar timepiece according to any one of claims 8 to 10, wherein a groove portion capable of diffusing light is formed on a surface of the second coating film. Movement,
A solar timepiece comprising: a dial having a light-transmitting coating film having a film thickness of 20 μm or more formed on a surface of a plate-shaped substrate having light transmittance.   The solar timepiece according to claim 12, wherein the surface of the coating film is formed into a smooth surface by mirror polishing.   14. The solar timepiece according to claim 12, wherein the movement is configured to receive a radio wave and adjust a time.

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