JP4473594B2 - Clock dial - Google Patents

Description

  The present invention relates to a timepiece dial, and in particular, a timepiece dial using a fabric of plastic fibers (hereinafter referred to as plastic fibers) such as morpho fiber, a manufacturing method thereof, and a portable timepiece having the same. About.

  In recent years, nanofiber fibers in which nanofibers are bundled into fibers have emerged and have been used in various fabrics. Nanofibers are made of fibers having a diameter of several tens of nanometers to several hundreds of nanometers (1 μm is 1000 nanometers), and are bundled to be used as fibers having a thickness of several tens of micrometers. Nylon nanofiber fibers are one of them, and they have been used for textiles such as underwear because of their good hygroscopicity. Morpho fiber is one of them, and vivid colors such as blue, purple, red, green, and pearl colors with metallic appearance appear depending on the viewing angle and light intensity, and a very mysterious color is obtained. This is called a morpho fiber because it resembles the color of a morpho butterfly, but it has also been used for clothing because it is very beautiful.

  Since this morpho fiber enhances the fashionability of appearance, a technique for use in appearance parts such as portable information devices has also appeared. One of them is the technique disclosed in Patent Document 1 below.

Japanese Patent Publication No. 2002-192070

  FIG. 9 is a perspective view of a cellular phone coated with morpho fiber as disclosed in Patent Document 1 above. According to this, the surface of the housing 2 made of ABS resin is coated with a paint containing morpho fiber, and by this coating, the color is reflected by light reflection, interference, diffraction or scattering, and the appearance is fashionable. It is said that has increased.

  According to this patent document 1, after pre-coating black paint on the surface of the casing 2 formed by injection molding using ABS resin, a morpho fiber having a fiber length of 0.15 to 0.6 mm and a fiber thickness of φ100 to 200 μm. It is said that a fiber (5% by weight) is coated with a clear lacquer (95% by weight) to a thickness of 200 μm.

  However, since the thing of the said patent document 1 mixes a morpho fiber in a clear lacquer, since the refractive index of a fiber and a lacquer is near, effects, such as a reflection from a morpho fiber and interference, decrease. The effect of coloring will be halved. In addition, when the fiber length is short, the decorativeness is not sufficiently exhibited, and when the fiber length is long, it looks like lint. In addition, it cannot be applied to a fabric that wants to enhance the decorativeness by making it possible to see the pattern of the woven fabric with morpho fiber. For example, the dial of a portable watch is a part that requires decorativeness, and the sense of quality greatly varies depending on the decoration of the dial. Therefore, the dial of the portable watch is also required to have a high value decoration. If the dial pattern of the morpho fiber can be seen on the dial and a beautiful color like a morpho butterfly appears, it can be very rich in decoration and enhance the value of the watch.

  Therefore, the following experiment was conducted in order to provide a morph fiber fabric on the timepiece dial. First, (Experiment 1) A morpho fiber fabric was affixed to a metal dial plate substrate, and an experiment was carried out to produce a dial plate shape by press working. As a result, the result depicted in FIG. 10 appeared. FIG. 10 shows a cross-sectional view of the main part of a timepiece dial plate obtained by press working, where a morpho fiber fabric 10 is attached to a metal substrate 12 via an adhesive 11 and subjected to press working. The cut fibers of the morpho fiber cloth 10 in the small holes for attaching the pointers were scattered at the cut ends, and a large number of fiber chips 10a were generated. As a result, it was judged that press working was not suitable under these conditions.

  For this reason, (Experiment 2) Next, an experiment was conducted in which a morpho fiber fabric was affixed to a plastic (polycarbonate resin) dial plate and a dial shape was formed by laser processing, and the results depicted in FIG. 11 appeared. FIG. 11 is a cross-sectional view of a main part of a timepiece dial plate obtained by laser processing, where a morpho fiber fabric 10 is attached to a polycarbonate resin substrate 13 via an adhesive 11 and laser processing is performed. Although the fluff disappeared, a phenomenon that the laser-processed cut surfaces 10b and 13b of the outer shape portion and the pointer attaching small hole portion were blackened appeared. This was also a rejected result.

  Then, (Experiment 3) Next, an experiment was carried out in which the morpho fiber fabric was processed into a required shape by laser processing and attached to a dial substrate having a shape. When the morpho fiber fabric was processed into a required shape by laser processing, the desired shape was obtained without the blackening that appeared in Experiment 2 above. However, the next problem was that it was difficult to align the morpho fiber fabrics when they were aligned and pasted to the dial substrate. Even if it was done using a positioning jig, it took a considerable amount of time to apply it cleanly. Moreover, the thick morpho fiber with a waist cannot be used from the restriction | limiting of the thickness of a dial.

  From the above, a method that can be easily applied in a short time has been demanded. The present invention has been made in view of such problems, and the object of the present invention is to find a simple method capable of affixing a plastic fiber cloth such as a morpho fiber cloth in a timepiece on a timepiece dial. There is.

As a means for achieving the above object, a timepiece dial according to claim 1 of the present invention is a timepiece dial using a plastic fiber cloth , wherein the plastic fiber cloth is shaped and flat, A reinforcing layer formed of a resin for strengthening the cloth is provided on the lower surface of the fiber fabric, and the portion of the reinforcing layer where the resin enters the gap of the plastic fiber fabric is less than half the thickness of the plastic fiber fabric. It is characterized by being pressed .

  The timepiece dial described in claim 2 of the present invention is characterized in that the plastic fiber fabric is a morpho fiber fabric.

The timepiece dial according to claim 3 of the present invention, the reinforcing layer is characterized in that an acrylic resin or polyester resins.

A timepiece dial according to claim 4 of the present invention is characterized in that a thin transparent protective film is provided on the upper surface of the plastic fiber cloth.

  As an effect of the invention, since the reinforcing layer for strengthening the waist of the plastic fiber fabric is provided under the invention of the first aspect, the plastic fiber fabric can be easily attached to the dial substrate. The stitch pattern of the plastic fiber fabric and its color can be obtained from the dial.

  Moreover, under the invention of claim 2, since a morpho fiber fabric is used, a color such as a morpho butterfly is obtained, and a very beautiful appearance decoration is obtained.

Also, under the invention described in claim 3, since it uses an acrylic resin or polyester resins to the reinforcing layer, blackening even if the laser processing Plastic fiber fabric provided with the reinforcing layer occurs Not . The Les chromatography The process enables cut into a desired shape, clean cut surface is obtained.

Moreover, under the invention of Claim 4 , protection from the disorder and damage of the fiber of a plastic fiber fabric can be performed.

  Hereinafter, the best embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a portable timepiece using a timepiece dial according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the main part in FIG. 1, and FIG. 3 is a first embodiment of the present invention. FIG. 4 is an enlarged view of a portion A in FIG. 3. FIG. 5 is a process diagram showing a manufacturing process of the timepiece dial in FIG. FIG. 6 shows a cross-sectional view of the main part of the timepiece dial of the portable timepiece according to the second embodiment of the present invention. FIG. 7 is a cross-sectional view of a main part of a timepiece dial according to a third embodiment of the present invention, and FIG. 8 is an enlarged view of a portion C in FIG.

  A timepiece dial according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2 show a plan view and a cross-sectional view of a main part of a portable timepiece using the timepiece dial according to the first embodiment of the present invention. FIG. 3 shows a cross-sectional view of the main part of the timepiece dial according to the first embodiment of the present invention, and FIG. 4 shows an enlarged view of portion A in FIG. 1 and 2, the portable timepiece 30 using the timepiece dial according to the first embodiment of the present invention includes a timepiece dial 40, a movement 38, attached to the inside of the case 31 via an inner frame 37. A pointer 34 indicating the hour hand and the minute hand attached to the pointer shaft of the movement 38 is accommodated, and a transparent cover glass 32 and a back cover 36 are attached so as to cover them, and a band 33 is attached to a fitting portion of the case 31. The crown 35 is attached to the side surface of the case 31. Here, the timepiece dial 40 uses the timepiece dial according to the first embodiment of the present invention, and the timepiece dial 40 will be described in detail with reference to FIGS. 1 and 2, only the visible element parts are picked up, and the lattice pattern of the plastic fiber fabric 43 shown in the lattice form in FIG. 1 is only a part. It is drawn and other parts are omitted. In addition, since the components other than the timepiece dial 40 have already been used with the technical specifications disclosed heretofore, description thereof is omitted here.

  3 and 4, the timepiece dial 40 of the present invention includes a dial plate 41 having a center hole 41 b for attaching a pointer, and a plastic fiber having a center hole 43 b provided on the upper surface side of the dial substrate 41. Main components are a fabric 43, a reinforcing layer 42 provided to strengthen the lower back of the fabric on the lower surface of the plastic fiber fabric 43, and a time character 45 provided at a predetermined position on the outer periphery of the upper surface of the plastic fiber fabric 43. It is configured. The reinforcing layer 42 of the plastic fiber fabric 43 and the dial plate substrate 41 are adhesively fixed via an adhesive 44 to form an integrated structure.

  The dial substrate 41 is made of a metal such as phosphor bronze or white and is subjected to a surface treatment such as plating or painting. As the plastic fiber fabric 43, a morpho fiber fabric is used. This morpho fiber has a multi-layered structure in which 61 layers of polyester and nylon having different refractive indexes are stacked with a thickness of several tens of nanometers. As shown in FIG. 4, the thickness of one fiber 43a is as follows. It is a fiber having an elliptical structure with a thickness of 15 to 20 μm and a width of 60 to 70 μm. As shown in a circled portion B in FIG. 4, the morpho fiber fabric is a woven fabric formed by gathering about 10 morpho fibers and knitting them into a cross. The thickness of the fabric is about 150 to 200 μm. This morpho fiber emits a color that a morpho butterfly emits by reflection of light, interference, etc., and a very beautiful and beautiful unique appearance color is obtained. Further, the plastic fiber fabric 43 made of this morpho fiber fabric is used in a state of being flattened as will be described later.

  The reinforcing layer 42 provided on the lower surface of the plastic fiber cloth 43 is provided to strengthen the waist of the plastic fiber cloth 43 made of morpho fiber cloth. Since the morpho fiber fabric is very soft, it must be stiffened and affixed to the dial substrate. In this embodiment, the reinforcing layer 42 is made of a transparent thermosetting acrylic resin paint that cures at 140 degrees or less. A paint having a thickness of about 5 to 10 μm is applied by a spray coating method. The paint also penetrates into the gaps between the stitches and the bundled fibers, but the part where the paint enters the gaps in the fabric is kept within the range of about half or less of the thickness of the fabric. Thus, the amount of the reinforcing layer 42 may be a very small amount. The plastic fiber cloth 43 and the reinforcing layer 42 shown in FIG. 3 are formed by forming a reinforcing layer 42 made of acrylic resin on the lower surface of the plastic fiber cloth 43 made of morpho fiber cloth as described above, and performing laser processing to obtain a required dial. Finished in shape. Then, after finishing the dial shape by laser processing, the dial plate 41 and the adhesive 44 are used to align the positions and paste them together.

  The time character 45 is formed by screen printing using ink of a desired color. When providing a metal time character formed by an electroforming method or a metal time character formed by a machining method, a printed coating film is once provided on the plastic fiber cloth, and the gap between the stitches of the plastic fiber cloth is formed. It is preferable to close the surface and make the time character bonding surface flat (in order to increase the bonding area and increase the bonding strength), and to provide it on the bonding method.

  The timepiece dial 40 having the above-described configuration uses a morpho fiber cloth, and the surface of the morpho fiber cloth is exposed to air. A beautiful and beautiful appearance color can be obtained. And, as a portable watch, a unique appearance color obtained from the watch dial 40 and a decoration such as a knitted pattern on the fabric are made rich and luxurious. Further, since the morpho fiber is permeable, the color tone of the dial substrate 41 made of metal is slightly visible. The decorativeness can be further improved by combining with the color tone of the dial plate 41 and the color tone of the coating.

  Next, a method for manufacturing a timepiece dial having the above-described configuration will be described with reference to FIG. FIG. 5 is a process chart showing a method for manufacturing a timepiece dial. First, (a) figure has shown the process of shaping the plastic fiber fabric 43 flatly. The plastic fiber fabric 43 is sandwiched between two smooth glass substrates 101 in a sufficiently stretched state, and is subjected to heat treatment at approximately 140 degrees for 1 hour in a pressurized state. This gives a flatly shaped fabric. The pressing force may be lightly pressed, and the pressing temperature is preferably in the range of 130 to 140 degrees. When a temperature of 145 degrees or more is applied, discoloration of the fabric occurs. (B) The figure has shown the plastic fiber fabric 43 shape | molded flatly. Next, in FIG. 4C, a reinforcing layer 42 is formed on the lower surface of the plastic fiber fabric 43. In this embodiment mode, a thermosetting acrylic resin is formed by spraying and then completely cured by heating. As described above, the amount of coating is 5 to 10 μm thick. It penetrates into the gaps of the stitches and hardens. Next, in FIG. 4D, laser processing is performed to finish the dial shape of a required shape. Finally, in FIG. 5E, the plastic fabric 43 and the reinforcing layer 42 are adhered and fixed to the dial substrate 41 formed in a required shape via the adhesive 44 and integrated. Although not shown in the drawing, the time character 45 is formed by a printing method or the like thereafter, and the completed timepiece dial 40 is completed.

  When such a manufacturing method is taken, the plastic fiber fabric 43 is neatly stretched and flattened, and the stitch pattern is arranged and shaped. Further, when the reinforcing layer 42 is applied to the plastic fiber cloth 43 shaped as described above, it can be uniformly applied over the entire surface even though the application amount is small, and a strong plastic fiber cloth 43 can be obtained. When a morpho fiber fabric is used as the plastic fiber fabric 43, a color that emits a color like a morpho butterfly appears beautifully. Further, a thermosetting acrylic resin is used as the reinforcing layer 42. This acrylic resin is not blackened by laser cutting using a carbonic acid laser, and a beautiful cut surface can be obtained. In addition to the acrylic resin, a polyester resin or the like can also be used as a material for the reinforcing layer. The plastic fiber fabric 43 that has been stiffened as described above can be pasted very easily by laser-cutting it into a watch dial shape, aligning it on the dial plate substrate 41 and pasting it through an adhesive 44. . And the color and the knitted pattern of the fabric peculiar to morpho fiber can be shown on the dial.

  The timepiece dial 40 using the morpho fiber cloth of this embodiment is visually recognized through the transparent cover glass 32 of the portable timepiece 30. Since the surface of the morpho fiber fabric is exposed to air, light from above directly enters the morpho fiber. For this reason, the color developed from the morpho fiber appears beautifully.

  Next, a timepiece dial according to a second embodiment of the present invention will be described with reference to FIG. FIG. 6 shows a cross-sectional view of the main part of a timepiece dial according to the second embodiment of the present invention. This timepiece dial corresponds to a portable timepiece with a solar cell. A portable timepiece with a solar cell has a structure in which a solar cell is disposed between the movement and the timepiece dial shown in FIG. Accordingly, the portable timepiece has a structure in which a solar cell is disposed on the lower surface side of the timepiece dial shown in FIG.

  From FIG. 6, this timepiece dial plate 50 is a PET dial plate 51 made of plastic, a plastic fiber fabric 53 made of a morpho fiber fabric, and a PET attached to the lower surface of the plastic fiber fabric 53 via an adhesive 56. A reinforcing layer 52 made of a (polyethylene terephthalate) sheet and a time character 55 are used as main components. The plastic fiber fabric 53 provided with the reinforcing layer 52 is bonded and fixed to the dial substrate 51 via an adhesive 54.

  Here, the dial substrate 51 uses a polycarbonate resin slightly colored in white, and the light transmittance is set to about 70%. When the thickness of the morpho fiber fabric is 150 to 200 μm, a light transmittance of about 35 to 40% can be obtained, so that a transmittance of at least about 25% is obtained as a whole transmittance. Recent solar cells have improved power generation efficiency, and those having a light transmission rate of 15 to 20% or more have sufficiently fulfilled the power generation function. Therefore, the timepiece dial 50 according to the present embodiment ensures a sufficient transmittance that does not hinder solar cell power generation. The purpose of coloring the dial substrate 51 is to relieve the unique deep purple color of the solar cell, and in this embodiment, it is colored white. Because the morpho fiber fabric has a white color tone, it is more whitened to increase whiteness on the dial and to further soften the color of the solar cell. However, the color tone is not limited to white, and a color tone may be appropriately determined according to the design. A transparent polycarbonate resin may also be used. Further, it may be colored by printing or painting on a transparent plastic dial substrate. For the plastic fiber fabric 53, a morpho fiber fabric is used as in the first embodiment. Since the morpho fiber fabric has been described in the first embodiment, description thereof is omitted here. However, the morpho fiber fabric is also shaped and used flat. In this embodiment, the reinforcing layer 52 uses a PET (polyethylene terephthalate) sheet representing a polyester resin. It is transparent and has a thickness of about 130 μm, and is adhered to the morpho fiber fabric via an adhesive 56 made of an acrylic resin adhesive. The adhesive 56 here uses a transparent acrylic resin, and is applied to the morpho fiber fabric in an amount of 5 to 10 μm thick with exactly the same specifications as the reinforcing layer used in the first embodiment. A reinforcing layer 52 serving as a transparent PET sheet is pressed against the morpho fiber fabric and the PET sheet is bonded and fixed by pressing and heating. The morpho fiber fabric to which the PET sheet is bonded is subjected to laser processing to finish the dial shape shown in the figure.

  In the timepiece dial 50 having such a configuration, the waist of the plastic fiber cloth 53 becomes considerably strong, and it becomes very easy to attach the dial plate 51 to the dial substrate 51. Moreover, the unique color which the morpho fiber fabric has is obtained like the above-mentioned 1st Embodiment. And the decoration of the texture and the texture pattern of the fabric is given to the portable timepiece with solar cell.

  In this embodiment, a PET sheet is used for the reinforcing layer 52, but an acrylic resin sheet may be used. Even if the plastic fiber cloth provided with the reinforcing layer made of these resin sheets is subjected to laser processing, the blackening phenomenon does not occur and the cutting can be performed neatly.

  Next, a timepiece dial according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 7 shows a cross-sectional view of a main part of a timepiece dial according to the third embodiment of the present invention, and FIG. 8 shows an enlarged view of a portion C in FIG.

  The timepiece dial 60 includes a dial substrate 61 made of metal, a plastic fiber fabric 63 made of morpho fiber fabric, a reinforcing layer 62 provided to strengthen the lower back of the fabric on the lower surface of the plastic fiber fabric 63, A transparent protective film 67 provided on the upper surface of the plastic fiber fabric 63 and a time character 65 provided at a predetermined position on the outer periphery on the protective film 67 are configured as main components. Then, the reinforcing layer 62 of the plastic fiber fabric 63 and the dial plate substrate 61 are adhesively fixed via an adhesive 64 to form an integrated structure. The configuration of the timepiece dial of the first embodiment described with reference to FIG. 3 described above is different only in that a transparent protective film 67 is provided.

  The transparent protective film 67 is formed by a spray coating method or the like after a plastic fiber fabric 63 provided with a reinforcing layer 62 is bonded to the dial substrate 61 with an adhesive 64. As the paint, urethane resin, epoxy resin, acrylic resin, or the like can be used. This protective film 67 is formed with a very thin thickness of 5 μm or less. When the thickness is 5 μm or less, a beautiful color like a morpho butterfly can be obtained from the morpho fiber fabric, but when it is thicker than this, the color cannot be obtained. When the protective film is thick, the change in color is reduced even if the viewing angle is changed due to the relationship between the refractive index of the coating and the fiber.

  Also, by providing a thin protective film 67 on the surface of the morpho fiber fabric, thin morpho fiber flakes (fiber gathers loosen and fall apart) and fiber pops out (fiber pops out) Etc. can be prevented. When the morpho fiber fabric is exposed on the surface, contact with the surface of the fabric occurs during the handling of the work, and fiber breakage or popping often occurs. A protective film produces the effect which prevents these. It also protects against fiber damage. If this protective film is applied in advance, a dial shape can be formed by press working.

  When an acrylic resin or a polyester resin is used for the protective film 67, the protective film 67 may be formed together when the reinforcing layer 62 is formed. Since the protective film 67 at this time also serves as a reinforcing layer, the waist of the fabric can be considerably strengthened. Since these resins are not blackened even by laser processing, there is no need to newly provide a protective film in a later process.

  The timepiece dial having the above configuration can also obtain a unique color such that a morpho butterfly emits, as in the timepiece dial of the first and second embodiments described above. Further, since a protective film is provided on the morpho fiber cloth, it can be avoided from being damaged even if it is placed in an exposed state.

  As described above, the timepiece dial according to the first to third embodiments of the present invention has been described by using a morpho fiber cloth as a plastic fiber cloth. Since a timepiece dial is required to have a high decorative property, it is made into a dial using various kinds of decorative plastic fiber fabrics. The present invention is applicable even when these plastic fiber fabrics are used.

The present invention in the timepiece dial has been described in detail above. The present invention can be used not only for timepiece dials but also for general decorative parts. Moreover, it can be used not only for a portable watch but also for an external decorative part of an electronic device such as a portable information device.
The present invention

It is a top view of the portable timepiece using the timepiece dial according to the first embodiment of the present invention. It is principal part sectional drawing of the portable timepiece in FIG. It is principal part sectional drawing of the timepiece dial which concerns on 1st Embodiment of this invention. It is an enlarged view of the A section in FIG. It is process drawing which showed the manufacturing process of the timepiece dial in FIG. It is principal part sectional drawing of the timepiece dial which concerns on 2nd Embodiment of this invention. It is principal part sectional drawing of the timepiece dial which concerns on 3rd Embodiment of this invention. It is an enlarged view of the C section in FIG. It is a perspective view of the mobile telephone which coated the morpho fiber as shown by the said patent document 1. FIG. It is principal part sectional drawing of the dial for timepieces obtained by press work in the experiment using the morpho fiber fabric. It is principal part sectional drawing of the dial for timepieces obtained by the laser processing in the experiment using the morpho fiber cloth.

Explanation of symbols

30 Mobile watch
31 Case 32 Cover glass 33 Band 34 Pointer 35 Crown 36 Back cover 37 Middle frame 38 Movement 40, 50, 60 Dial 41, 51, 61 Dial plate 42, 52, 62 Reinforcement layer 43, 53, 63 Plastic fiber Cloth 44, 54, 64 Adhesive 45, 55, 65 Time 56 Adhesive 67 Protective film

Claims (4)

In the timepiece dial using plastic fiber cloth, the plastic fiber cloth is shaped and flat, and a lower layer of the plastic fiber cloth is provided with a reinforcing layer formed of a resin for strengthening the waist of the cloth, A timepiece dial, wherein a portion where the resin enters a gap of the plastic fiber cloth is pressed to a half or less of a thickness of the plastic fiber cloth .   The timepiece dial according to claim 1, wherein the plastic fiber fabric is a morpho fiber fabric. The reinforcing layer may timepiece dial according to claim 1, wherein the acrylic resin or polyester resins.   The timepiece dial according to claim 1, wherein a thin transparent protective film is provided on an upper surface of the plastic fiber fabric.

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