JP2008139120A - Watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To Provide a watch which is excellent in esthetic appearance and also secured with sufficient electric power generation by a solar battery. <P>SOLUTION: The watch 1 of this invention is the solar watch provided with a dial plate 6 which transmits a part of incident light, and a solar battery 8. Between the dial plate 6 and the solar battery 8, a light guide member 7 is provided. The light guide member 7 is provided with a light incident part 75 arranged on the outer periphery of the dial plate 6, a first reflecting and transmitting part 77 provided on the face opposite to the dial plate 6, having functions partly reflecting and partly transmitting the light guided from the light incident part 75 and a second reflecting and transmitting part 78 provided on the face opposite to the solar battery 8 having the function partly reflecting and partly transmitting the light guided from the light incident pat 75. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a timepiece.

A watch is required to have a function as a practical product and a decorative property (aesthetic appearance) as a decorative product. In particular, in solar timepieces equipped with solar cells, when solar cells (solar cells) are placed under the dial (solar watch dial), the dial has excellent light transmissivity and other decorative items. As a decorative material (aesthetic appearance).
Specifically, the dial for a solar timepiece provides a sufficient amount of light for driving the timepiece through a solar cell disposed below the solar dial, while providing a decorative item. There is also a demand for decorativeness.

Conventionally, in a solar timepiece, in order to make a sufficient amount of light incident on the solar cell, the solar cell itself is used as a dial plate, and a colored member (particularly a dark member) is not arranged on the solar cell. The shape of the dial is designed, and a color similar to the self-color (usually black to purple) of the solar cell has been used as the dial.
However, in recent years, there is a strong demand for adopting dials of various tones in solar timepieces according to timepiece specifications and the like.

As a dial plate that tried to prevent the solar cell from being seen through the dial plate, the dial plate is made of a metal material on one side of a plastic substrate and has a small size for transmitting light. There is an attempt to provide a metal layer having holes (see Patent Document 1). However, in order to take in a sufficient amount of external light, light is transmitted by increasing the size of each small hole or increasing the number of small holes per unit area. It is necessary to increase the total area (sum of a plurality of small hole areas) of possible portions. In such a case, small holes are conspicuous on the appearance of the dial, and a watch equipped with such a dial is inferior in aesthetics (aesthetic appearance). For the purpose of improving the aesthetic appearance of the dial, if the size of each small hole is reduced or the number of small holes per unit area is reduced, a sufficient amount of external light is transmitted. It becomes difficult.
Thus, in the past, it has been difficult to obtain a solar watch (a watch equipped with a solar cell) that has both excellent decorativeness (aesthetic appearance) and a sufficient amount of power generated by a solar cell. .

JP 11-326549 A

  An object of the present invention is to provide a timepiece having an excellent aesthetic appearance and a sufficient amount of power generated by a solar cell.

Such an object is achieved by the present invention described below.
The timepiece of the present invention is a timepiece including a dial plate that transmits a part of incident light and a solar cell,
Between the dial plate and the solar cell, having a light guide member provided so that at least a part thereof is disposed,
The light guide member includes a light incident portion provided near the outer periphery of the dial,
A first reflection / transmission unit that is provided on a surface facing the dial and has a function of partially reflecting and partially transmitting the light guided from the light incident unit;
A second reflection / transmission unit provided on the surface facing the solar cell and having a function of partially reflecting and partially transmitting the light guided from the light incident unit; Features.
Thereby, a sufficient amount of external light can be supplied to the solar cell, and a timepiece (solar timepiece) excellent in aesthetic appearance can be provided.

In the timepiece of the present invention, the light guide member has a thickness in the vicinity of the center portion smaller than that in the vicinity of the end portion in the portion disposed between the dial and the solar cell. Is preferred.
Thereby, the light incident from the light incident part can be guided to the dial plate and the solar cell more efficiently. As a result, the aesthetic appearance of the timepiece can be made particularly excellent, and the power generation efficiency by the solar cell can be further improved.

In the timepiece of the present invention, it is preferable that the surface of the light guide member facing the dial plate is a conical surface or a curved surface.
Thereby, the light incident from the light incident part can be guided to the dial plate and the solar cell more efficiently. As a result, the aesthetic appearance of the timepiece can be made particularly excellent, and the power generation efficiency by the solar cell can be further improved.

In the timepiece of the invention, it is preferable that a surface of the light guide member facing the solar cell is a conical surface or a curved surface.
Thereby, the light incident from the light incident part can be guided to the dial plate and the solar cell more efficiently. As a result, the aesthetic appearance of the timepiece can be made particularly excellent, and the power generation efficiency by the solar cell can be further improved.

In the timepiece of the invention, it is preferable that the curved surface has an inflection point.
Thereby, a suitable luminance distribution can be given to each part of the dial, and the decorativeness (aesthetic appearance) of the timepiece can be made particularly excellent.
In the timepiece according to the aspect of the invention, it is preferable that the light guide member has a concave portion that houses the dial.
As a result, it is possible to reliably prevent the dial and the light guide member from moving relative to each other during use of the timepiece, and to make the aesthetic appearance of the timepiece stable and excellent. Can do.

In the timepiece of the present invention, the dial is a glass fiber sheet mainly composed of glass fiber,
A first film provided on the first surface side which is one main surface of the glass fiber sheet;
A second film provided on the second surface side which is the other main surface of the glass fiber sheet,
The glass fiber sheet is provided in the vicinity of the surface of the first surface, provided in the vicinity of the first region in which at least a part of the first film enters, and in the vicinity of the surface of the second surface, A second region in which at least a part of the second film has entered, and a first region in which the first film and the second film do not enter, provided between the first region and the second region. 3 regions are preferable.
Thereby, the aesthetic appearance of the timepiece can be made particularly excellent, and the power generation efficiency by the solar cell can be further improved.

The timepiece of the present invention is preferably a wristwatch.
In general, wristwatches are required to have excellent decorativeness and practicality in various environments because the conditions of the environment in which they are used are not constant. In particular, the solar wristwatch is required to have excellent decorativeness among various solar timepieces, and is required to generate sufficient power in the solar cell. Therefore, the present invention can be preferably applied to a wristwatch, among various types of timepieces (solar timepieces).

  ADVANTAGE OF THE INVENTION According to this invention, while being excellent in the aesthetic appearance, the timepiece which ensured sufficient electric power generation amount by a solar cell can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.
FIG. 1 is a partial sectional view showing a preferred embodiment of a timepiece (watch) of the present invention. Note that the drawings referred to in this specification show part of the configuration in an emphasized manner, and do not accurately reflect actual dimensions and the like. In the following description, the upper side in the figure, that is, the side on which the cover glass 5 is provided is referred to as “upper side” in the figure, that is, the side opposite to the side in which the cover glass 5 is provided in the timepiece. Is described as “lower side”.

  As shown in FIG. 1, a timepiece (watch) 1 includes a case (case) 2, a back cover 3, a bezel (edge) 4, and a glass plate (cover glass) 5. Further, in the space in the case 2 (the space formed by the body 2, the back cover 3, the bezel 4, and the glass plate 5), the dial 6 and the guide are sequentially provided from the side where the glass plate 5 is provided. The optical member 7, the solar cell 8, and the movement 9 are accommodated, and further, a hand (pointer) 10 (hour hand 101, minute hand 102, second hand 103) and the like are accommodated.

Hereinafter, each member constituting the timepiece 1 will be described.
The constituent material of the trunk | drum (case) 2, the back cover 3, and the bezel 4 is not specifically limited, Various metal materials (including an alloy), various resin materials (plastic material), various ceramic materials, etc. are mentioned. Among these, a metal material is usually preferably used because of its excellent aesthetic appearance and strength. The trunk | drum (case) 2, the back cover 3, and the bezel 4 may be comprised with the mutually same material, and may be comprised with a different material.

The glass plate 5 is usually made of transparent glass or sapphire having high transparency. Thereby, the aesthetics (aesthetic appearance) of the timepiece as a decorative article can be made particularly excellent, and a sufficient amount of light can be incident on the solar cell 8.
A winding stem pipe 11 is fitted and fixed to the body 2, and a shaft 121 of a crown 12 is rotatably inserted into the winding stem pipe 11. The position of the hour hand 101 and the minute hand 102 can be adjusted by the crown 12.

The body 2 and the bezel 4 are fixed by a plastic packing 13, and the bezel 4 and the glass plate 5 are fixed by a plastic packing 14.
Further, the back cover 3 is fitted (or screwed) to the body 2, and a ring-shaped rubber packing (back cover packing) 17 is inserted into the joint portion (seal portion) 15 in a compressed state. Has been. With this configuration, the seal portion 15 is sealed in a liquid-tight manner, and a waterproof function is obtained.

  A groove 122 is formed in the outer periphery of the shaft portion 121 of the crown 12, and a ring-shaped rubber packing (crown packing) 16 is fitted in the groove 122. The rubber packing 16 is in close contact with the inner peripheral surface of the winding stem pipe 11 and is compressed between the inner peripheral surface and the inner surface of the groove 122. With this configuration, the space between the crown 12 and the winding stem pipe 11 is sealed in a liquid-tight manner to obtain a waterproof function. When the crown 12 is rotated, the rubber packing 16 rotates together with the shaft 121 and slides in the circumferential direction while being in close contact with the inner peripheral surface of the winding stem pipe 11.

With the configuration as described above, the space in the case 2 (the space formed by the trunk 2, the back cover 3, the bezel 4, and the glass plate 5) is kept liquid-tight.
In the space in the case 2, a dial 6, a light guide member 7, a solar cell 8, and a movement 9 are installed.
The dial 6 transmits a part of the incident light. Thereby, the light incident from the surface (first surface) on the glass plate 5 side of the dial 6 can be transmitted at a predetermined rate and reflected or absorbed at a predetermined rate. As a result, the light used for power generation can be incident on the solar cell 8 while improving the appearance of the dial 6.

Further, on the outer surface (first surface) side of the dial 6, a time scale, decorative characters, marks and the like (not shown) are provided.
The detailed configuration of the dial 6 will be described later.
A light guide member 7 is provided on the second surface side of the dial 6 (the surface side facing the solar cell 8). In other words, the light guide member 7 is provided between the dial 6 and the solar cell 8 so that a part thereof is disposed.

The light guide member 7 includes an annular body 72 disposed on the outer peripheral portion of the dial 6 and a plate-like body 73 disposed between the dial 6 and the solar cell 8, which are integrally formed. It has been made.
A recess 71 is formed by the inner peripheral surface of the annular body 72 and the upper surface of the plate-like body 73 (the surface on the side facing the dial 6). The dial 6 is fitted in the recess 71 so that the second surface of the dial and the upper surface of the plate-like body 73 come into contact with each other. As a result, it is possible to reliably prevent the dial 6 and the light guide member 7 from relatively moving when the timepiece 1 is used, and the aesthetic appearance of the timepiece 1 is stably excellent. Can be.

The annular body 72 functions as, for example, a dial ring, a parting ring, or a turning ring. The annular body 72 has a light incident portion 75 that guides external light (light transmitted through the glass plate 5) to the inside of the light guide member on the upper surface (the surface on the side facing the glass plate 5).
If the bezel 4 is made transparent, more light can be guided more effectively, and the bezel 4 and the light guide member 7 may be integrated with a transparent body.

  The light incident from the light incident portion 75 travels inside the light guide member 7 and repeats reflection near the surface of the light guide member 7 while facing the face side facing the dial 6 and the solar cell 8. The light is irradiated to the outside of the light guide member 7 from the surface to be performed. That is, the light guide member 7 is a surface that irradiates light toward the dial plate 6 from the first reflection / transmission portion 77 that is a surface facing the dial plate 6 and that faces the solar cell of the light guide member 7. Light is irradiated from the second reflection / transmission part 78 toward the solar cell 8.

  In this way, the light irradiated on the outer side (outer periphery) of the dial 6 is guided between the dial 6 and the solar cell 8, and the guided light is distributed and irradiated to the dial 6 and the solar cell 8. Thus, the light applied to the solar cell 8 can be effectively used for power generation, and the visibility of the dial 6 is improved by the backlight effect, and a particularly excellent aesthetic appearance is obtained. In particular, since the dial 6 has a function of transmitting part of the incident light, the light guided to the solar cell 8 side by the light guide member 7 and the light transmitted through the dial 6 are combined, The intensity of light applied to the solar cell 8 can be particularly large. As a result, the power generation efficiency in the solar cell 8 can be made particularly excellent.

  In addition, since a part of the light guided by the light guide member 7 is irradiated toward the dial plate 6, the solar cell 8 or the like even when the light transmittance of the dial plate 6 is relatively high. It is possible to reliably prevent the member disposed on the second surface side of the dial 6 from being visually recognized by the user or the like. That is, when there is no backlight effect by the light guide member 7, even if the light transmittance of the dial 6 is high to the extent that members such as the solar cell 8 are easily visible, A member (solar cell or the like) arranged on the second surface side of the dial plate 6 such as the solar cell 8 can be reliably prevented from being visually recognized by a user or the like. For this reason, the timepiece 1 as a whole can have particularly high intensity of light applied to the solar cell 8, and the power generation efficiency in the solar cell 8 can be particularly excellent.

  In addition, since a part of the light guided by the light guide member 7 is irradiated toward the solar cell 8, even if the light transmittance of the dial 6 is relatively low, Sufficient intensity of light can be irradiated. For this reason, even if a conventional solar timepiece has a dial with low light transmittance, which could not be applied, it can be applied in the present invention. Thereby, since the aesthetic appearance inherent to the dial 6 itself (that is, the aesthetic appearance in a state where the backlight effect by the light guide member 7 is not exhibited) can be made particularly excellent, When applied to the timepiece 1 (that is, a state in which the backlight effect by the light guide member is exhibited), it can be particularly excellent, and a high-class feeling that is difficult to realize with a conventional timepiece is achieved. Can be expressed.

Such a light guide member 7 is mainly composed of a material having optical transparency.
As the constituent material of the light guide member 7, for example, various plastics, various glasses, various ceramics and the like can be used. However, the light guide member 7 is made of plastic (particularly, heat-resistant plastic). Is preferred. As a result, for example, it is possible to provide a timepiece 1 that is lightweight and easy to carry while sufficiently improving the light use efficiency as the light guide member 7. For example, it can be formed into a desired shape relatively easily.

  Examples of the plastic constituting the light guide member 7 include various thermoplastic resins and various thermosetting resins, and more specifically, for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer. Polyolefin such as polymer (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, polycarbonate (PC), poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyoxymethylene, polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyethylene terephthalate (PET), Polybutylene terephthalate (PBT), Polycyclohexane terephthalate (PCT) and other polyesters, polyethers, polyetherketone (PEK), polyetheretherketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide , Polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, poly Various thermoplastics such as vinylidene fluoride, other fluororesins, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, trans polyisoprene, fluororubber, chlorinated polyethylene Elastomer, epoxy resin, phenol resin, urea resin, melamine resin, unsaturated polyester, silicone resin, urethane resin, poly-para-xylylene, poly-monochloro-para- xylylene), poly-dichloro-para-xylylene, poly-monofluoro-para-xylylene, poly-monoethyl-para-xylylene, etc. Polyparaxylylene resins, etc., or copolymers and blends mainly containing these resins It includes polymer alloy or the like, singly or in combination of two or more of these (e.g., a blend resin, polymer alloy, as a laminate or the like) can be used.

Examples of the glass constituting the light guide member 7 include alkali-free glass, soda glass, crystalline glass, quartz glass, lead glass, potassium glass, borosilicate glass, and the like. A combination of the above can be used.
The reflection / transmission part (first reflection / transmission part 77, second reflection / transmission part 78) as described above is a film (reflection) that has a function of partially reflecting and partially transmitting light on the plate-like body 73. It may be formed by coating a permeable membrane. In this case, if necessary, a light guide member made of the material as described above and a wavelength selective reflection / transmission film may be combined. Thereby, optical loss can be suppressed reliably and light can be used more effectively.

  Further, the reflection / transmission part (the first reflection / transmission part 77, the second reflection / transmission part 78) is not provided with the above-described coating, and is the surface of the light guide member 7 (for example, the atmosphere with the light guide member 7). The light may be partially reflected and partially transmitted by the difference in the refractive index at the interface with air. According to this, the configuration of the reflection / transmission part (the first reflection / transmission part 77, the second reflection / transmission part 78) can be made simpler.

  Further, in the illustrated configuration, the light guide member 7 is thinner in the vicinity of the central portion in the portion disposed between the dial 6 and the solar cell 8 than in the vicinity of the end portion. . With such a configuration, the light incident from the light incident portion 75 can be guided to the dial 6 and the solar cell 8 more efficiently. As a result, the aesthetic appearance of the timepiece 1 can be made particularly excellent, and the power generation efficiency by the solar cell 8 can be further improved.

  In the illustrated configuration, one surface of the plate-like body 73 is inclined with respect to the other surface. More specifically, the lower surface of the plate-like body 73 is a conical surface. With such a configuration, the light incident from the light incident portion 75 can be guided to the dial 6 and the solar cell 8 more efficiently. As a result, the aesthetic appearance of the timepiece 1 can be made particularly excellent, and the power generation efficiency by the solar cell 8 can be further improved.

Further, as shown in the drawing, in this embodiment, in particular, the outer peripheral surface of the light guide member 7 is an inclined surface inclined by a predetermined angle with respect to the normal direction of the upper surface of the annular body 72 (light incident portion 75). The inclined surface functions as a reflecting surface 76 that reflects incident light. That is, after the light incident from the light incident portion 75 is once reflected by the reflecting surface 76 (the reflecting surface 76 as an inclined surface inclined by a predetermined angle with respect to the normal direction of the upper surface of the annular body 72), The reflection / transmission part 77 and the second reflection / transmission part 78 are guided. Thereby, since the light incident from the light incident part 75 can be efficiently guided to the first reflection / transmission part 77 and the second reflection / transmission part 78, the light loss by the light guide member 7 is attenuated. Light loss can be suitably prevented, and the incident light can be efficiently used for improving the aesthetic appearance of the timepiece 1 and for power generation in the solar cell. The inclination angle (θ in the figure) as an angle formed between the normal direction of the upper surface (light incident portion 75) of the annular body 72 and the inclined surface (reflection surface 76) is not particularly limited, but is 10 to 45 °. Is preferable, and it is more preferable that it is 20-40 degrees.
Thereby, the efficiency of light reflection at the reflecting surface 76 can be made particularly excellent. In addition, although the reflective surface 76 is provided in the planar shape in the structure of illustration, it may be provided in the curved surface shape.

  The reflection surface 76 may be, for example, one having an inclination angle θ that theoretically causes total reflection, but is a coating made of a highly reflective material such as a metal material on the inclination surface. It may be coated. As a result, light incident from an angle that theoretically does not cause total reflection can be efficiently reflected, and the reflection efficiency of the light on the reflecting surface 76 can be more reliably improved. it can.

The film may be composed of any material, but is preferably composed of a metal material (including an alloy). In general, the metal material has a particularly high light reflectivity and has a metallic luster, and can give a high-class feeling to the reflected light. As a result, the aesthetic appearance of the timepiece 1 can be made particularly excellent.
Examples of the metal material constituting the coating include Fe, Cu, Zn, Ni, Mg, Cr, Mn, Mo, Nb, Al, V, Zr, Sn, Au, Pd, Pt, Ag, Co, In, and W. Ti, Rh, and alloys containing at least one of these. The coating is preferably composed of a material (including an alloy) containing at least one selected from Ag, Cr, Au, Al, Ti, Sn, and In, among the materials described above. .

The solar cell 8 has a function of converting light energy into electric energy. The electric energy converted by the solar battery is used for driving the movement.
In the solar cell 8, for example, a p-type impurity and an n-type impurity are selectively introduced into a non-single-crystal silicon thin film, and a p-type non-single-crystal silicon thin film and an n-type non-single-crystal silicon thin film are used. It has a pin structure provided with an i-type non-single-crystal silicon thin film with a low impurity concentration in between.

  As described above, in the timepiece 1, a part of the light incident on the surface of the dial 6 is transmitted and irradiated toward the solar cell 8, and the light guided from the light guide member 7 is also solar cell 8. Is irradiated. As described above, in the timepiece 1, since a sufficient irradiation amount can be easily ensured, sufficient power generation can be performed even if the solar cell 8 is relatively thin. Thereby, it can contribute to thickness reduction of the timepiece 1. FIG. Although the thickness of the solar cell 8 is not specifically limited, It is preferable that it is 1-100 micrometers.

The movement 9 has a built-in mechanism for driving the hour hand 101, the minute hand 102 and the second hand 103 by the electric power generated by the power generation of the solar cell 8, and an axis for driving each hand (the hour hand 101, the minute hand 102 and the second hand 103). The dial 6 is held at a position penetrating through the central hole.
Although omitted in FIG. 1, in the movement 9, for example, an electric double layer capacitor for storing the electromotive force of the solar cell 8, a lithium ion secondary battery, a crystal resonator as a time reference source, a crystal oscillation A semiconductor integrated circuit that generates a driving pulse that drives the clock based on the oscillation frequency of the child, a step motor that drives the wheel train mechanism every second in response to this driving pulse, and a movement of the step motor A train wheel mechanism for transmitting to the vehicle is provided.

The movement 9 includes a radio wave receiving antenna (not shown). And it has the function to perform time adjustment etc. using the received electromagnetic wave.
As described above, in the timepiece 1, the light irradiated on the outer peripheral portion of the dial 6 can be supplied to the solar cell 8 by the light guide member 7, thereby supplying sufficient light for power generation in the solar cell 8. The amount of power generated by the solar cell 8 can be sufficiently secured. Moreover, the dial 6 can be displayed brightly by guiding light by the light guide member 7 and illuminating the dial 6 from the back side. Thereby, it is possible to effectively prevent the self-color of the solar cell 8 located below the dial 6 from being seen through the dial 6. As a result, a variety of design expressions are possible, a high-quality pattern, texture and appearance quality can be improved, and a watch with excellent merchantability can be provided.

  The timepiece 1 described above is a wristwatch. The effect of the present invention can be obtained in any timepiece, not limited to a wristwatch. However, when applied to a wristwatch, a more remarkable effect can be obtained. That is, in general, a wristwatch is required to have excellent decorativeness and practicality in various environments because the conditions of the environment in which it is used are not constant. In particular, the solar wristwatch is required to have excellent decorativeness among various solar timepieces, and is required to generate sufficient power in the solar cell. Therefore, the present invention can be preferably applied to a wristwatch, among various types of timepieces (solar timepieces).

Next, a preferred specific example of the dial 6 provided in the timepiece 1 will be described in detail.
FIG. 2 is a cross-sectional view showing a preferred embodiment of a dial provided in the timepiece of the invention.
As shown in FIG. 2, the dial 6 has a glass fiber sheet 62, a first film 63, and a second film 64. When the dial 6 is applied to the timepiece 1, for example, one of the surface side on which the first film 63 is provided and the surface side on which the second film 64 is provided is the outer surface side. In the following description, it is assumed that the surface side on which the second film 64 is provided is the outer surface side.

[Glass fiber sheet]
The glass fiber sheet 62 is mainly composed of glass fibers.
The glass fiber sheet 62 exhibits a glossy white appearance because it has a function of irregularly reflecting external light. With such a glass fiber sheet 62, the aesthetic appearance of the dial 6 can be made particularly excellent.

Moreover, by providing the glass fiber sheet 62, the dial plate 6 has a three-dimensional texture, and has an excellent appearance that has not existed before.
Moreover, the glass material which comprises glass fiber is generally excellent in the transmittance | permeability (electromagnetic wave transmissivity) of electromagnetic waves (radio waves, light). Moreover, since the glass fiber sheet 62 generally has a gap between the glass fiber and the glass fiber, the glass fiber sheet 62 has particularly excellent electromagnetic wave (radio wave, light) permeability.

Examples of the constituent material of the glass fiber include soda glass, crystalline glass, quartz glass, lead glass, potassium glass, borosilicate glass, and alkali-free glass.
The refractive index (absolute refractive index) of the constituent material of the glass fiber is not particularly limited, but is preferably 1.40 to 1.70, more preferably 1.45 to 1.65, and 1.50. More preferably, it is -1.60. When the refractive index of the constituent material of the glass fiber is a value within the above range, the aesthetic appearance of the dial 6 is particularly excellent while sufficiently improving electromagnetic wave (radio wave, light) permeability. Can do.

  Moreover, the thickness of the glass fiber which comprises the glass fiber sheet 62 is although it does not specifically limit, It is preferable that it is 1-20 micrometers, It is more preferable that it is 2-15 micrometers, It is further more preferable that it is 4-13 micrometers. When the thickness of the glass fiber is within the above range, the aesthetic appearance of the dial 6 can be made particularly excellent while sufficiently improving the electromagnetic wave (radio wave, light) permeability. In addition, the adhesion of the glass fiber sheet 62 to the first film 63 and the second film 64 can be made particularly excellent, and the mechanical strength (stability against deformation) of the dial 6 can be improved. It can be made particularly excellent. As a result, the durability of the dial 6 is particularly excellent. On the other hand, when the thickness of the glass fiber is less than the lower limit, the aesthetic appearance as the dial 6 is lowered and the electromagnetic wave (radio wave, light) permeability is also lowered. On the other hand, when the thickness of the glass fiber exceeds the upper limit, the aesthetic appearance as the dial 6 is deteriorated (particularly, it becomes difficult to obtain a high-quality appearance with high whiteness), and variations in the appearance. The width becomes narrower. In addition, the adhesion with the first film 63 and the second film 64 also tends to decrease.

The surface density of the glass fiber sheet 62 is not particularly limited, but is preferably 20 to 500 g / ^{m 2,} more preferably from 40400 g / ^{m 2,} in the range of 100 to 300 g / ^{m 2} Is more preferable. When the surface density of the glass fiber sheet 62 is a value within the above range, the aesthetic appearance of the dial 6 is particularly excellent while sufficiently improving the electromagnetic wave (radio wave, light) permeability. it can. In addition, the adhesion of the glass fiber sheet 62 to the first film 63 and the second film 64 can be made particularly excellent, and the mechanical strength (stability against deformation) of the dial 6 can be improved. It can be made particularly excellent. As a result, the durability of the dial 6 is particularly excellent.

  Although the thickness of the glass fiber sheet 62 is not specifically limited, It is preferable that it is 30-500 micrometers, It is more preferable that it is 50-400 micrometers, It is further more preferable that it is 80-300 micrometers. When the thickness of the glass fiber sheet 62 is a value within the above range, the aesthetic appearance and durability of the dial 6 are sufficiently excellent, and the transparency of electromagnetic waves (radio waves, light) is particularly excellent. can do. On the other hand, if the thickness of the glass fiber sheet 62 is less than the lower limit value, depending on the constituent material of the glass fiber sheet 62 and the like, it becomes difficult to make the aesthetic appearance of the dial 6 sufficiently excellent. . Further, if the thickness of the glass fiber sheet 62 is less than the lower limit value, it is difficult to provide a first region 623 and a second region 624 described later with sufficient thickness. It may be difficult to increase durability sufficiently. On the other hand, when the thickness of the glass fiber sheet 62 exceeds the upper limit, the thickness of the dial 6 as a whole increases, and when applied to the timepiece 1, it is disadvantageous for making the timepiece 1 thinner. Moreover, when the thickness of the glass fiber sheet 62 exceeds the upper limit, the transmittance of the electromagnetic wave as the dial 6 may be lowered depending on the constituent material of the glass fiber sheet 62 and the like.

  Further, the glass fiber sheet 62 may be composed of any woven structure such as plain weave, twill weave, satin weave, tangle weave, imitation weave, etc., and is not woven. It may be a thing. Among these, a structure composed of a woven structure is preferable, and a structure composed of a woven structure woven in a plain weave is more preferable. Thereby, the aesthetic appearance of the dial 6 can be made particularly excellent.

A first film 63 is provided on the first surface 621 side, which is one main surface of the glass fiber sheet 62. A second film 64 is provided on the second surface 622 side, which is the other main surface of the glass fiber sheet 62 (the main surface opposite to the first surface 621).
The glass fiber sheet 62 has a first region 623 in which at least a part of the first film 63 enters in the vicinity of the surface of the first surface 621, and the surface of the second surface 622. In the vicinity, a second region 624 into which at least a part of the second film 64 enters is provided.

  As described above, the surface of the glass fiber sheet is coated with the film, so that the dial has excellent mechanical strength. And in this embodiment, since the film | membrane has penetrated into a part of thickness direction of a glass fiber sheet, the adhesiveness of a glass fiber sheet and a film | membrane becomes excellent. In particular, in the glass fiber sheet, since the glass fibers are entangled, the anchor effect is effectively exhibited when the film enters between the glass fibers and the glass fibers, and the adhesion between the glass fiber sheet and the film is particularly good. It will be excellent. For this reason, it is possible to maintain excellent mechanical strength stably over a long period of time. Further, the glass fiber sheet is constituted by having a structure in which the surface of the glass fiber sheet is covered with a film (first film and second film), and the film enters a part in the thickness direction of the glass fiber sheet. It is possible to effectively prevent the glass fibers to be frayed. As a result, it is possible to reliably prevent the deterioration of the aesthetic appearance of the dial due to fraying of the glass fibers over a long period of time. In addition, it is possible to reliably prevent the occurrence of adverse effects on the movement or the like due to frayed glass fibers, and the reliability of the timepiece can be made particularly excellent.

  Moreover, the following effects are also acquired by providing a film | membrane on the surface of a glass fiber sheet. In other words, since the glass fiber sheet is composed of a large number of glass fibers, as it is, there are relatively large irregularities on the surface, and it is difficult to process printing, typesetting (planting), sticking time letters, etc. In addition, since it is difficult to sufficiently enhance the adhesion, it is difficult to apply to the dial, but by providing a film on the surface of the glass fiber sheet as described above, Can be easily and reliably performed.

  Further, such a film (a film in which at least a part thereof has entered a part in the thickness direction of the glass fiber sheet) is provided on both surfaces of the glass fiber sheet. For this reason, even when a temperature change occurs, it effectively prevents the warpage of the dial due to the difference in thermal expansion coefficient between the constituent material of the film and the constituent material of the glass fiber sheet. can do. That is, by having films on both sides of the glass fiber sheet, the stability of the shape of the dial can be improved.

  Although the thickness of the 1st field 623 changes with thickness of glass fiber sheet 62, thickness of the 2nd field 624, etc., it is preferred that it is 0.1-140 micrometers, and is 0.2-80 micrometers. Is more preferable, and it is still more preferable that it is 0.5-30 micrometers. When the thickness of the first region 623 is a value within the above range, the adhesiveness between the glass fiber sheet 62 and the first film 63 is particularly excellent while sufficiently improving the aesthetic appearance of the dial 6. The durability (mechanical strength, shape stability, etc.) of the dial 6 can be made particularly excellent. On the other hand, if the thickness of the first region 623 is less than the lower limit value, the adhesion between the glass fiber sheet 62 and the first film 63 is sufficiently increased depending on the constituent material of the first film 63 and the like. It becomes difficult to increase, and it becomes difficult to sufficiently enhance the durability of the dial 6. On the other hand, when the thickness of the first region 623 exceeds the upper limit, the thickness of the third region 625 described later is small depending on the thickness of the glass fiber sheet 62, the thickness of the second region 624, and the like. Therefore, the aesthetic appearance of the dial 6 itself tends to be lowered.

  Moreover, although the thickness of the 2nd area | region 624 changes with the thickness of the glass fiber sheet 62, the thickness of the 1st area | region 623, etc., it is preferable that it is 0.1-140 micrometers, 0.2-80 micrometers. More preferably, it is more preferably 0.5 to 30 μm. When the thickness of the second region 624 is a value within the above range, the adhesion between the glass fiber sheet 62 and the second film 64 is particularly excellent while sufficiently improving the aesthetic appearance of the dial 6. The durability (mechanical strength, shape stability, etc.) of the dial 6 can be made particularly excellent. In contrast, if the thickness of the second region 624 is less than the lower limit, depending on the constituent material of the second film 64, the adhesion between the glass fiber sheet 62 and the second film 64 is sufficient. It becomes difficult to increase, and it becomes difficult to sufficiently enhance the durability of the dial 6. On the other hand, when the thickness of the second region 624 exceeds the upper limit, the thickness of the third region 625 described later is small depending on the thickness of the glass fiber sheet 62, the thickness of the first region 623, and the like. Therefore, the aesthetic appearance of the dial 6 tends to decrease.

  In addition to the first region 623 and the second region 624 as described above, the glass fiber sheet 62 includes the first film 63 and the second region 624 between the first region 623 and the second region 624. The second region 64 has a third region (air layer) 625 where the second membrane 64 does not enter. In the third region 625, the glass fibers constituting the glass fiber sheet 62 are usually covered with an atmosphere such as air. Such an atmosphere generally has a refractive index (about 1.001) sufficiently smaller than the material constituting the glass fiber.

  In this way, the glass fiber sheet has a region (third region) in which the constituent material of the film does not enter in the thickness direction, so that the external light can be effectively irregularly reflected, etc. The aesthetic appearance can be made particularly excellent. On the other hand, if it does not have the third region, it will not be possible to effectively perform irregular reflection of external light and the like, and it will be difficult to sufficiently exhibit the excellent aesthetic appearance of the glass fiber sheet. . More specifically, if the third region is not provided, the transparency of the dial plate itself becomes too high, and when one side (main surface) side of the dial plate is viewed, There is a possibility that even the opposite side (main surface) side will be visible. This is because the constituent materials of the first film 63 and the second film 64 generally have a sufficiently large refractive index as compared with a gas such as air, and usually the difference from the refractive index of the glass fiber. Since it has a small refractive index, it is thought that it is because the irregular reflection of the external light, etc. by a glass fiber will be prevented. In order to prevent the above problems, it is conceivable to use a relatively large amount of colorant as a constituent material of the dial. In such a case, the light transmittance of the dial is reduced. End up.

  The thickness of the third region 625 is not particularly limited, but is preferably 5 to 280 μm, more preferably 30 to 260 μm, and still more preferably 79 to 245 μm. When the thickness of the third region 625 is within the above range, the aesthetic appearance of the dial 6 can be made particularly excellent while the durability of the dial 6 is made sufficiently excellent. On the other hand, if the thickness of the third region 625 is less than the lower limit value, the aesthetic appearance of the dial 6 is sufficiently excellent depending on the constituent material, thickness, and the like of the second film 64. Can be difficult. On the other hand, when the thickness of the third region 625 exceeds the upper limit, depending on the thickness of the glass fiber sheet 62 and the like, the thickness of the first region 623 and the second region 624 may be sufficiently increased. It becomes difficult, and it becomes difficult to sufficiently enhance the durability of the dial 6. Further, when the thickness of the third region 625 exceeds the upper limit value, the thickness of the glass fiber sheet 62 is increased in order to increase the thickness of the first region 623 and the second region 624. However, in this case, the thickness of the dial 6 as a whole is increased, which is disadvantageous for reducing the thickness of the timepiece 1, for example.

[First film]
The first film 63 may be made of any material, but is preferably made of a highly transparent material (for example, a material having a visible light transmittance of 60% or more). In particular, those composed of organic polymer materials such as various plastic materials are preferable. Thereby, while making the aesthetic appearance of the dial 6 sufficiently excellent, the transparency of electromagnetic waves (radio waves and light) can be made particularly excellent. Further, the adhesion between the first film 63 and the glass fiber sheet 62 can be made particularly excellent, and the durability of the dial 6 can be made particularly excellent.

  Examples of the organic polymer material constituting the first film 63 include various thermoplastic resins and various thermosetting resins, such as polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer. (EVA) and other polyolefins, cyclic polyolefins, modified polyolefins, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyamides (eg, nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6 -12, nylon 6-66), polyimide, polyamideimide, polycarbonate (PC), poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS) Tree ), Acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyoxymethylene, polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyester such as polycyclohexane terephthalate (PCT), polyether, polyether ketone (PEK), polyether ether ketone (PEEK), polyether imide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, Polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride , Other fluororesins, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, transpolyisoprene, fluororubber, chlorinated polyethylene, and other thermoplastic elastomers, Epoxy resin, phenol resin, urea resin, melamine resin, unsaturated polyester, silicone resin, urethane resin, poly-para-xylylene, poly-monochloro-para-xylylene , Poly-dichloro-para-xylylene, poly-monofluoro-para-xylylene, poly-monoethyl-para-xylylene, etc. Paraxylylene resin, etc., or copolymers, blends, polymer polymers mainly containing these Lee, and the like, singly or in combination of two or more of these (e.g., a blend resin, a polymer alloy or the like) can be used.

  The first film 63 may be, for example, a stacked body having a plurality of layers, or a film whose composition changes sequentially in the thickness direction (gradient material). When the first film 63 has such a configuration, for example, the characteristics of a plurality of types of materials constituting the first film 63 can be more effectively exhibited. More specifically, for example, in the first film 63, a material constituting a portion (first portion) that enters the glass fiber sheet 62 and a portion (second portion) that does not enter the glass fiber sheet 62 are included. The durability of the dial 6 (shape stability, mechanical strength, etc.) while making the adhesion of the first film 63 to the glass fiber sheet 62 particularly excellent by selecting a combination with the constituent materials Can be made particularly excellent.

  When the 1st film | membrane 63 is what has the above structures (laminated body and gradient material), the area | region (1st site | part) which penetrates into the glass fiber sheet 62 is an adhesive agent component (adhesive or adhesion | attachment). And a region on the outer surface side of the region (second portion) is polycarbonate (PC), acrylic resin, acrylonitrile-butadiene-styrene copolymer (ABS). It is preferable that it is made of a material containing at least one selected from (resin). When the first film 63 is made of such a material, the above-described effects can be exhibited more remarkably.

  In addition, examples of the adhesive component include those composed of polyester (polyester adhesive), urethane resin (urethane adhesive), acrylic resin, etc. Acrylic resin (acrylic adhesive) is preferred. Since the acrylic resin (acrylic adhesive) has a particularly high affinity with the constituent material of the glass fiber sheet 62 and the constituent material of the second part, the glass fiber sheet 62 of the first part and The adhesion to the second part can be made particularly excellent, and as a result, the adhesion between the glass fiber sheet 62 and the first film 63 can be made particularly excellent. The acrylic resin (acrylic adhesive) has particularly excellent light resistance and chemical resistance, and can improve the durability of the entire dial 6. In the manufacture of the dial 6, the adhesive component may be in any form such as a liquid adhesive, a pressure-sensitive adhesive sheet, a pressure-sensitive adhesive tape, a thermo-compression tape, a thermo-compression-bonding sheet. Good.

Polycarbonate is relatively inexpensive among various plastic materials, and can contribute to further reduction in the production cost of the dial 6. Moreover, the acrylic resin has particularly excellent light resistance and chemical resistance, and can improve the durability of the entire dial 6. The ABS resin also has particularly excellent chemical resistance, and can further improve the durability of the dial 6 as a whole.
The first film 63 may include components other than those described above. Examples of such components include plasticizers, antioxidants, colorants (including various color formers, pigments, dyes, fluorescent substances, phosphorescent substances, etc.), brighteners, fillers, and the like.

The refractive index (absolute refractive index) of the constituent material of the first film 63 is not particularly limited, but is preferably 1.35 to 1.7, and more preferably 1.45 to 1.6.
The first film 63 may have a substantially uniform composition at each site, or may have a different composition depending on the site. For example, the first film 63 may have a base and a surface layer provided on the base. When the first film 63 has such a configuration, for example, the glass fiber of the first film 63 is made particularly excellent in the stability of the shape, mechanical strength, etc. of the entire dial 6. The adhesion to the sheet 62 can be further improved.

  Further, the thickness of the first film 63 is not particularly limited, but is preferably 50 to 300 μm, more preferably 100 to 280 μm, and further preferably 150 to 280 μm. When the thickness of the first film 63 is a value within the above range, the aesthetic appearance and durability of the dial plate 6 are improved while sufficiently improving the electromagnetic wave (radio wave, light) permeability of the dial plate 6. It can be made particularly excellent. When the thickness of the first film 63 is a value within the above range, for example, in the dial 6, the first film 63 is a substrate (base portion) that supports the glass fiber sheet 62 and the second film 64. ) Can be fully demonstrated. On the other hand, if the thickness of the first film 63 is less than the lower limit, it is difficult to make the dial plate 6 sufficiently excellent in mechanical strength, shape stability, and the like. It may be difficult to make the durability of the steel sufficiently excellent. On the other hand, if the thickness of the first film 63 exceeds the upper limit, depending on the constituent material of the first film 63, it may be difficult to make the aesthetic appearance of the dial 6 sufficiently excellent. There is sex. If the thickness of the first film 63 exceeds the upper limit, depending on the constituent material of the first film 63, the internal stress of the first film 63 increases, and the shape of the dial 6 becomes stable. May be reduced.

  In addition, when the first film 63 has the first part and the second part as described above (for example, a laminate, a gradient material, etc.), the thickness of the first part is particularly limited. Although it is not, it is preferable that it is 1-125 micrometers, It is more preferable that it is 5-100 micrometers, It is further more preferable that it is 7-80 micrometers. The thickness of the second part is not particularly limited, but is preferably 49 to 240 μm, more preferably 85 to 220 μm, and still more preferably 95 to 210 μm. By satisfying such a condition, the above-described effects are exhibited more significantly.

  The first film 63 only needs to enter at least part of the glass fiber sheet 62, for example, even if substantially the entire thickness of the first film 63 enters the glass fiber sheet 62. However, in the configuration shown in the figure, the glass fiber sheet 62 has a portion that does not enter. Thereby, the dial surface becomes flat and the effect that it becomes easy to attach designs, such as a typesetting, printing, and painting, is acquired.

[Second film]
The second film 64 may be made of any material, but is preferably made of a highly transparent material (for example, a material having a visible light transmittance of 60% or more). In particular, those composed of organic polymer materials such as various plastic materials are preferable. Thereby, while making the aesthetic appearance of the dial 6 sufficiently excellent, the transparency of electromagnetic waves (radio waves and light) can be made particularly excellent. In addition, the adhesion between the second film 64 and the glass fiber sheet 62 can be made particularly excellent, and the durability of the dial 6 can be made particularly excellent.

  Examples of the organic polymer material constituting the second film 64 include various thermoplastic resins and various thermosetting resins, such as polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer. Polyolefin such as (EVA), cyclic polyolefin, modified polyolefin, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyamide (example: nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6 -12, nylon 6-66), polyimide, polyamideimide, polycarbonate (PC), poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS) Tree ), Acrylonitrile-styrene copolymer (AS resin), butadiene-styrene copolymer, polyoxymethylene, polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyester such as polycyclohexane terephthalate (PCT), polyether, polyether ketone (PEK), polyether ether ketone (PEEK), polyether imide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, Polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride , Other fluororesins, styrene, polyolefin, polyvinyl chloride, polyurethane, polyester, polyamide, polybutadiene, transpolyisoprene, fluororubber, chlorinated polyethylene, and other thermoplastic elastomers, Epoxy resin, phenol resin, urea resin, melamine resin, unsaturated polyester, silicone resin, urethane resin, poly-para-xylylene, poly-monochloro-para-xylylene , Poly-dichloro-para-xylylene, poly-monofluoro-para-xylylene, poly-monoethyl-para-xylylene, etc. Paraxylylene resin, etc., or copolymers, blends, polymer polymers mainly containing these Lee, and the like, singly or in combination of two or more of these (e.g., a blend resin, a polymer alloy or the like) can be used.

  The second film 64 may be, for example, a stacked body having a plurality of layers, or a film whose composition changes sequentially in the thickness direction (gradient material). When the second film 64 has such a configuration, for example, the characteristics of a plurality of types of materials constituting the second film 64 can be more effectively exhibited. More specifically, for example, in the second film 64, a material constituting a part (first part) that enters the glass fiber sheet 62 and a part (second part) that does not enter the glass fiber sheet 62 are included. The durability of the dial 6 (shape stability, mechanical strength, etc.) while making the adhesion of the second film 64 to the glass fiber sheet 62 particularly excellent by selecting a combination with the constituent materials Can be made particularly excellent.

  When the 2nd film | membrane 64 is what has the above structures (laminated body and gradient material), the area | region (1st site | part) which penetrates into the glass fiber sheet 62 is an adhesive component (adhesive or adhesion | attachment). And a region on the outer surface side of the region (second portion) is polycarbonate (PC), acrylic resin, acrylonitrile-butadiene-styrene copolymer (ABS). It is preferable that it is made of a material containing at least one selected from (resin). When the second film 64 is made of such a material, the above-described effects can be exhibited more remarkably.

  In addition, examples of the adhesive component include those composed of polyester (polyester adhesive), urethane resin (urethane adhesive), acrylic resin, etc. Acrylic resin (acrylic adhesive) is preferred. Since the acrylic resin (acrylic adhesive) has a particularly high affinity with the constituent material of the glass fiber sheet 62 and the constituent material of the second part, the glass fiber sheet 62 of the first part and The adhesion to the second part can be made particularly excellent, and as a result, the adhesion between the glass fiber sheet 62 and the second film 64 can be made particularly excellent. The acrylic resin (acrylic adhesive) has particularly excellent light resistance and chemical resistance, and can improve the durability of the entire dial 6. In the manufacture of the dial 6, the adhesive component may be in any form such as a liquid adhesive, a pressure-sensitive adhesive sheet, a pressure-sensitive adhesive tape, a thermo-compression tape, a thermo-compression-bonding sheet. Good.

Polycarbonate is relatively inexpensive among various plastic materials, and can contribute to further reduction in the production cost of the dial 6. The acrylic resin is particularly excellent in light resistance and chemical resistance, and can improve the durability of the entire dial 6. The ABS resin also has particularly excellent chemical resistance, and can further improve the durability of the dial 6 as a whole.
Note that the second film 64 may include components other than those described above. Examples of such components include plasticizers, antioxidants, colorants (including various color formers, pigments, dyes, fluorescent substances, phosphorescent substances, etc.), brighteners, fillers, and the like.

The refractive index (absolute refractive index) of the constituent material of the second film 64 is not particularly limited, but is preferably 1.35 to 1.7, and more preferably 1.45 to 1.6.
The second film 64 may have a substantially uniform composition at each site, or may have a different composition depending on the site. For example, the second film 64 may have a base and a surface layer provided on the base. By virtue of the second film 64 having such a configuration, for example, the glass fiber of the second film 64 is made particularly excellent in the stability of the shape, mechanical strength, etc. of the entire dial 6. The adhesion to the sheet 62 can be further improved.

  The thickness of the second film 64 is not particularly limited, but is preferably 50 to 300 μm, more preferably 100 to 280 μm, and further preferably 150 to 280 μm. When the thickness of the second film 64 is a value within the above range, the aesthetic appearance and durability of the dial 6 can be improved while sufficiently improving the electromagnetic wave (radio wave, light) transmission of the dial 6. It can be made particularly excellent. On the other hand, if the thickness of the second film 64 is less than the lower limit, it is difficult to make the dial plate 6 sufficiently excellent in mechanical strength, shape stability, and the like. It may be difficult to make the durability of the steel sufficiently excellent. On the other hand, when the thickness of the first film exceeds the upper limit, depending on the constituent material of the second film 64, it may be difficult to make the aesthetic appearance of the dial 6 sufficiently excellent. There is. When the thickness of the second film 64 exceeds the upper limit, depending on the constituent material of the second film 64, the internal stress of the second film 64 increases, and the shape of the dial 6 is stabilized. May be reduced.

  When the second film 64 has the first part and the second part as described above (for example, a laminated body, a gradient material, etc.), the thickness of the first part is particularly limited. Although it is not, it is preferable that it is 1-125 micrometers, It is more preferable that it is 5-100 micrometers, It is further more preferable that it is 7-80 micrometers. Moreover, the thickness of the second part is not particularly limited, but is preferably 40 to 240 μm, more preferably 50 to 220 μm, and further preferably 70 to 210 μm. By satisfying such a condition, the above-described effects are exhibited more significantly.

  The second film 64 only needs to enter at least part of the glass fiber sheet 62, for example, even if almost the entire second film 64 in the thickness direction enters the glass fiber sheet 62. However, in the configuration shown in the figure, the glass fiber sheet 62 has a portion that does not enter. Thereby, processing, such as printing, typesetting (at the time of setting), sticking of a time character, can be performed easily and reliably on the surface side of the dial 6 on which the second film 64 is provided.

  Although the thickness of the above dial 6 is not specifically limited, It is preferable that it is 300-700 micrometers, It is more preferable that it is 450-700 micrometers, It is more preferable that it is 480-600 micrometers, It is 480-520 micrometers. Most preferably. When the thickness of the dial 6 is a value within the above range, the aesthetic appearance and durability of the dial 6 are particularly excellent while sufficiently improving electromagnetic wave (radio wave, light) permeability. Even when a timepiece is manufactured, it can be manufactured without reducing the degree of freedom of the thickness of the timepiece.

The light transmittance of the dial 6 is preferably 20% or more, more preferably 22 to 50%, and even more preferably 25 to 40%.
The dial 6 may be made of a material containing a colorant. As described above, the dial 6 is provided with the glass fiber sheet 62. The glass material constituting the glass fiber itself is essentially colorless, and the glass fiber sheet made of such a glass material exhibits a white color (glossy). Therefore, the dial 6 with wide color variations can be provided by using the colorant. Such a colorant may be included in any part of the dial 6. For example, the colorant may be included as a constituent of the glass fiber sheet 62, or the first film. 63 may be included as a constituent component of the second film 64, or may be included as a constituent component of the second film 64.

  In the above description, the dial has been described as including the glass fiber sheet, the first film, and the second film. However, other than these, the dial may have a further structure. For example, the dial may have a coat layer on the second film (on the side opposite to the surface facing the first film). Thereby, for example, various characteristics such as weather resistance, water resistance, oil resistance, scratch resistance, wear resistance, and discoloration resistance as the entire dial can be improved. As a result, the durability as a dial can be made particularly excellent. Such a coat layer may be provided, for example, on the first film (on the surface opposite to the surface facing the first film).

  The dial 6 as described above is, for example, pressed, heated, or heated in a state where the first film 63, the glass fiber sheet 62, and the second film 64 are superposed in this order. It can be manufactured by heating while pressing. Further, after the glass fiber sheet 62 and one film (the first film 63 or the second film 64) are bonded, the other side of the glass fiber sheet 62 opposite to the surface where the film is bonded is It can also be manufactured by bonding a film (second film 64 or first film 63). Note that the thicknesses and the like of the first region 623 and the second region 624 can be set to desired values, for example, by adjusting the pressurization pressure, the heating temperature, and the like.

  In addition, when manufacturing by the above methods, it is preferable that the 1st film | membrane 63 used for manufacture is a thing whose rigidity is higher than the glass fiber sheet 62. FIG. Thereby, the stability of the shape of the dial 6 can be made particularly excellent. Moreover, when using the laminated body as mentioned above as the 1st film | membrane 63, the 2nd site | part (2nd layer) of the 1st film | membrane 63 is a thing whose rigidity is higher than the glass fiber sheet 62. preferable. Thereby, the stability of the shape of the dial 6 can be made particularly excellent while sufficiently exhibiting the effects described above.

  Moreover, when manufacturing by the above methods, it is preferable that the 2nd film | membrane 64 used for manufacture is a thing whose rigidity is higher than the glass fiber sheet 62. FIG. Thereby, the stability of the shape of the dial 6 can be made particularly excellent. Moreover, when using the laminated body as mentioned above as the 2nd film | membrane 64, the 2nd site | part (2nd layer) of the 2nd film | membrane 64 is a thing whose rigidity is higher than the glass fiber sheet 62. preferable. Thereby, the stability of the shape of the dial 6 can be made particularly excellent while sufficiently exhibiting the effects described above.

  As described above, the illustrated dial 6 itself has an excellent aesthetic appearance and an excellent light transmittance. The timepiece 1 includes the light guide member 7 as described above. Therefore, in addition to the excellent appearance of the dial 6 itself, the effect of the light guide member 7 works synergistically, and the aesthetic appearance of the timepiece 1 as a whole is very excellent. In particular, the aesthetic appearance can be made extremely excellent while efficiently irradiating the solar cell with external light.

Next, another embodiment of the timepiece of the invention will be described.
3, 4, and 5 are partial cross-sectional views showing other preferred embodiments of the timepiece of the invention.
Hereinafter, the timepiece of each embodiment will be described focusing on differences from the above-described embodiments, and the description of the same matters will be omitted.
In the timepiece 1 shown in FIG. 3, the lower surface of the plate-like body 73 is a curved surface. Here, the curved surface is a monotone curved surface. As described above, when the lower surface of the plate-like body 73 is a curved surface, the light incident from the light incident portion 75 can be guided to the dial 6 and the solar cell 8 more efficiently. As a result, the aesthetic appearance of the timepiece 1 can be made particularly excellent, and the power generation efficiency by the solar cell 8 can be further improved. In particular, by making the lower surface of the plate-like body 73 a curved surface, a suitable luminance distribution can be provided at each part of the dial 6. Thereby, the decorativeness (aesthetic appearance) of the timepiece 1 can be made particularly excellent.

  In the timepiece 1 shown in FIG. 4, the lower surface of the plate-like body 73 is an S-shaped curved surface having an inflection point. Thereby, the light incident from the light incident part 75 can be guided to the dial 6 and the solar cell 8 more efficiently. As a result, the aesthetic appearance of the timepiece 1 can be made particularly excellent, and the power generation efficiency by the solar cell 8 can be further improved. In particular, by making the lower surface of the plate-like body 73 a curved surface, a suitable luminance distribution can be provided at each part of the dial 6. Thereby, the decorativeness (aesthetic appearance) of the timepiece 1 can be made particularly excellent.

  In the timepiece 1 shown in FIG. 5, the upper surface of the plate-like body 73 is a conical surface. Thus, not only the lower surface of the plate-like body 73 but also the upper surface may be a conical surface or a curved surface. With such a configuration, the light incident from the light incident portion 75 can be guided to the dial 6 and the solar cell 8 more efficiently. As a result, the aesthetic appearance of the timepiece 1 can be made particularly excellent, and the power generation efficiency by the solar cell 8 can be further improved. Further, by making the upper surface of the plate-like body 73 a conical surface or a curved surface, the thickness of the entire watch is slightly increased, but a three-dimensional depth feeling can be expressed and the dial 6 is displayed brighter. be able to. Further, the light emitted toward the dial 6 can be distributed, and the radial change in luminance can be applied to the dial 6. Thereby, the decorativeness (aesthetic appearance) of the timepiece can be made particularly excellent.

As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to these.
For example, in the above-described embodiment, the light guide member has been described as having a recess in which the dial is accommodated. However, the light guide member may not have such a recess.
Moreover, you may color a light guide member as needed. As a result, the color range of the dial can be changed to widen the range of design selection.

In the above-described embodiment, the light guide member has been described as being provided such that only a part of the light guide member is positioned between the dial plate and the solar cell. It may be provided so as to be positioned between the two.
In the above-described embodiment, a wristwatch (portable clock) is described as an example of a clock. However, the present invention is similarly applied to other types of clocks such as a portable clock other than a wristwatch, a table clock, and a wall clock. Can be applied to.
Further, for example, at least a part of the light incident portion may be provided with an index such as a mark by forming a film, printing, attaching a member, or the like. Thereby, the decorativeness as a timepiece can be made particularly excellent.

It is a fragmentary sectional view which shows suitable embodiment of the timepiece of this invention. It is sectional drawing which shows suitable embodiment of the dial plate with which the timepiece of this invention is provided. It is a fragmentary sectional view which shows suitable embodiment of the timepiece of this invention. It is a fragmentary sectional view which shows suitable embodiment of the timepiece of this invention. It is a fragmentary sectional view which shows suitable embodiment of the timepiece of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Clock (watch) 2 ... Body (case) 3 ... Back cover 4 ... Bezel (edge) 5 ... Glass plate (cover glass) 6 ... Dial plate 62 ... Glass fiber sheet 621 ... First surface 622 ... Second Surface 623 ... 1st area | region 624 ... 2nd area | region 625 ... 3rd area | region 63 ... 1st film | membrane 64 ... 2nd film | membrane 7 ... Light guide member 71 ... Recessed part 72 ... Ring-shaped body 73 ... Plate-shaped body 75 ... Light incident part 76 ... Reflecting surface (light reflecting part) 77 ... First reflecting / transmitting part 78 ... Second reflecting / transmitting part 8 ... Solar cell 9 ... Movement 10 ... Hand (pointer) 101 ... Hour hand 102 ... Minute hand 103 ... Second hand DESCRIPTION OF SYMBOLS 11 ... Winding stem pipe 12 ... Crown 121 ... Shaft part 122 ... Groove 13 ... Plastic packing 14 ... Plastic packing 15 ... Joint part (seal part) 16 ... Rubber packing (crown packing) 17 ... Rubber pad Kin (back cover packing)

Claims (8)

A watch including a dial plate that transmits a part of incident light and a solar cell,
Between the dial plate and the solar cell, having a light guide member provided so that at least a part thereof is disposed,
The light guide member includes a light incident portion provided near the outer periphery of the dial,
A first reflection / transmission unit that is provided on a surface facing the dial and has a function of partially reflecting and partially transmitting the light guided from the light incident unit;
A second reflection / transmission unit provided on the surface facing the solar cell and having a function of partially reflecting and partially transmitting the light guided from the light incident unit; A characteristic watch.   2. The timepiece according to claim 1, wherein the light guide member has a thickness near a center portion smaller than a thickness near an end portion in a portion disposed between the dial and the solar cell. .   The timepiece according to claim 1 or 2, wherein a surface of the light guide member facing the dial is a conical surface or a curved surface.   The timepiece according to any one of claims 1 to 3, wherein a surface of the light guide member facing the solar cell is a conical surface or a curved surface. The timepiece according to claim 3 or 4, wherein the curved surface has an inflection point.   The timepiece according to any one of claims 1 to 5, wherein the light guide member has a recess for accommodating the dial. The dial is a glass fiber sheet mainly composed of glass fiber,
A first film provided on the first surface side which is one main surface of the glass fiber sheet;
A second film provided on the second surface side which is the other main surface of the glass fiber sheet,
The glass fiber sheet is provided in the vicinity of the surface of the first surface, provided in the vicinity of the first region in which at least a part of the first film enters, and in the vicinity of the surface of the second surface, A second region in which at least a part of the second film has entered, and a first region in which the first film and the second film do not enter, provided between the first region and the second region. The timepiece according to claim 1, wherein the timepiece has three regions.   The timepiece according to claim 1, wherein the timepiece is a wristwatch.

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