CN113687587A - Method for manufacturing windshield member, and timepiece - Google Patents

Abstract

The invention provides a windshield member and a timepiece, wherein the method for manufacturing the windshield member is a method for manufacturing the windshield member mounted on the front surface of an outer decorative shell of the timepiece, and the method comprises the following steps: a plurality of droplets of a light-transmitting ultraviolet-curable resin are adhered to a printed area provided on a surface of a flat transparent plate facing a dial of a timepiece, and the adhered droplets are cured by irradiation with ultraviolet light, thereby forming a light-transmitting resin structure in which the dial-side surface is covered with a plurality of irregular protrusions.

Description

Method for manufacturing windshield member, and timepiece

Technical Field

The invention relates to a method for manufacturing a windshield member, and a timepiece.

Background

In the past, in order to improve the appearance of timepieces, printing has been performed on the face of the windshield of the timepiece that faces the dial. For example, patent document 1 describes a windshield glass in which an ultraviolet-curable transparent resin and a colorant are used and printing is performed on an opposite surface with the same color tone.

[ Prior art documents ]

[ patent document ]

[ patent document 1 ] Japanese patent laid-open No. Sho 59-19879

Disclosure of Invention

According to patent document 1, printing with a transparent feeling can be performed on the opposite surface. On the other hand, with the diversification of timepiece designs, it is sought to create new aesthetic properties in the windshield member by designing the windshield member to the opposite surface.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a method of manufacturing a windshield member, and a timepiece, which can provide a new aesthetic appearance by designing a surface facing a dial of the timepiece.

A method of manufacturing a windshield member according to the present invention is a method of manufacturing a windshield member to be attached to a front surface of an exterior case of a timepiece, the method including: a plurality of droplets of a light-transmitting ultraviolet-curable resin are adhered to a printed area provided on a surface of a flat transparent plate facing a dial of a timepiece, and the adhered droplets are cured by irradiation with ultraviolet light, thereby forming a light-transmitting resin structure in which the dial-side surface is covered with a plurality of irregular protrusions.

In the method of manufacturing a windshield member of the present invention, the printing region is preferably provided in an outer edge region along an outer edge of the one surface.

In the method of manufacturing a windshield member of the present invention, the print area is preferably formed to have a width of 3.0mm or less.

In the method for manufacturing a windshield member according to the present invention, it is preferable that the ultraviolet ray is irradiated within 0.5 seconds from the adhesion of the liquid droplets when the resin structure is formed.

In addition, the method for manufacturing a windshield member of the present invention preferably further comprises: a plurality of 2 nd droplets of a light-transmitting ultraviolet-curable resin are deposited in a2 nd printing region provided on one surface, and the deposited 2 nd droplets are irradiated with ultraviolet light and cured within 5 seconds after 0.5 second from the deposition of the 2 nd droplets, thereby forming a light-transmitting 2 nd resin structure.

Further, in the method of manufacturing a windshield member of the present invention, it is preferable that the print area is provided so as to surround the 2 nd print area.

In the method of manufacturing a windshield member of the present invention, it is preferable that the printing region and the 2 nd printing region are provided so as to overlap each other, and the 2 nd droplet is attached after the resin structure is formed.

In the method of manufacturing a windshield member of the present invention, it is preferable that the printing region and the 2 nd printing region are provided so as to overlap each other, and droplets are deposited after the 2 nd resin structure is formed.

The windshield member of the present invention is a windshield member to be attached to a front surface of an exterior case of a timepiece, comprising: a transparent plate formed in a flat plate shape; and a plurality of light-transmitting resin structures disposed on a surface of the transparent plate facing the dial of the timepiece, wherein the surface of the resin structures on the dial side is covered with a plurality of irregular projections.

The timepiece of the present invention includes: an outer decorative shell; the windshield member of the invention is arranged on the front surface of the outer decoration shell; a dial plate which is internally disposed in the exterior case and is disposed opposite to one surface of the windshield member; and a pointer which is provided on the front surface of the dial and is driven so as to indicate time.

The method for manufacturing a windshield member, the windshield member, and the timepiece of the present invention can create a new aesthetic appearance by designing the face opposite to the dial of the timepiece.

Drawings

Fig. 1 is a front view of the timepiece 1.

Fig. 2 is a cross-sectional view of timepiece 1.

Fig. 3 is a front view of the windshield member 12.

Fig. 4 is a sectional view of the windshield member 12.

Fig. 5 is a partially enlarged sectional view of the windshield member 12.

Fig. 6 is a flowchart showing an example of a flow of the method for manufacturing the windshield member 12.

Fig. 7 is a diagram showing an example of the shape of the resin structure 123.

Fig. 8 is a front view of the windshield member 12.

Fig. 9 is a front view of the windshield member 12.

Fig. 10 is a front view of the windshield member 12 a.

Fig. 11 is a partially enlarged sectional view of the windshield member 12 a.

Fig. 12 is a partially enlarged perspective view of the windshield member 12 a.

Fig. 13 is a flowchart showing an example of a flow of the method for manufacturing the windshield member 12 a.

Fig. 14 is a partially enlarged sectional view of the windshield member 12 a.

Fig. 15 is a flowchart showing an example of a flow of the method for manufacturing the windshield member 12 a.

Fig. 16 is a partially enlarged sectional view of the windshield member 12 a.

Fig. 17 is a flowchart showing an example of a flow of the method for manufacturing the windshield member 12 a.

Fig. 18 is a front view of timepiece 1 b.

Fig. 19 is a front view of the windshield member 12 b.

Fig. 20 is a sectional view of the windshield member 12 b.

Detailed Description

Various embodiments of the present invention will be described below with reference to the drawings. However, it should be noted that the scope of the present invention is not limited to the embodiments, and encompasses the inventions described in the claims and equivalents thereof.

(embodiment 1)

Fig. 1 is a front view of a timepiece 1 according to embodiment 1, and fig. 2 is a cross-sectional view of the timepiece 1. Fig. 2 is a cross-sectional view of section II-II of fig. 1. In fig. 2, the illustration of the member that is visible from the cross section inward is omitted, and the same applies to the subsequent cross-sectional views. Hereinafter, the upper side in fig. 2 may be referred to as the front side, and the lower side in fig. 2 may be referred to as the rear side. The face of the timepiece 1 facing forward may be referred to as a front face, and the face facing rearward may be referred to as a rear face. The timepiece 1 has an exterior case 11, a windshield member 12, a dial 13, a movement 14, an hour hand 141, a minute hand 142, a second hand 143, a crown 15, and the like.

The outer case 11 is formed in a flat, substantially circular plate shape, and is a member that houses a dial 13, a movement 14, and the like of a timepiece. The exterior case 11 is formed of a ring-shaped bezel 111 provided on the front surface, a back cover 113 provided on the back surface, and a side surface 112 joining the bezel 111 and the back cover 113.

Bezel 111 is bonded to an upper portion of side surface 112 via an adhesive member 114 which is an adhesive. The side surface 112 is bonded to the back cover 113 at a lower portion thereof by an adhesive member 115 which is an adhesive. A grip 116 for gripping the band is formed at a part of the side surface 112. A crown hole through which the crown 15 is inserted is formed in a part of the side surface 112.

Bezel 111, side 112, and back cover 113 are formed of stainless steel. Bezel 111, side surface 112, and back cover 113 may be formed of other metals such as titanium, titanium alloy, and gold, or resin.

The windshield member 12 is mounted on the front surface of the exterior case 11 in such a manner as to be surrounded by the bezel 111. The windshield member 12 includes a transparent plate 121 formed in a disc shape, and a translucent resin structure 123 provided on an opposite surface 122 of the transparent plate 121 to the dial 13. The transparent plate 121 is formed of sapphire glass or polycarbonate (transparent resin). The transparent plate 121 may be formed of other glass such as inorganic glass. The transparent plate 121 is bonded to the front portion of the side surface 112 via an adhesive member 124, which is an adhesive agent, and covers the dial 13, the hour hand 141, the minute hand 142, and the second hand 143, so that these members can be viewed from the front and protected. An antireflection film made of silicon dioxide, magnesium fluoride, or the like may be provided on the facing surface 122, and the resin structure 123 may be provided on the antireflection film.

Fig. 3 is a front view of the damper member 12, and fig. 4 and 5 are sectional views of the damper member 12. Fig. 4 is a sectional view of section IV-IV of fig. 3, and fig. 5 is a partially enlarged sectional view of the vicinity of resin structure 123 of fig. 4.

The resin structures 123 are arranged in the form of droplets in a plurality of printing regions provided in an outer edge region a1 along the outer edge of the facing surface 122. The outer edge region a1 is a region in which the distance R2 from the center C of the facing surface 122 is 85% or more of the radius R1 of the facing surface 122. As shown in fig. 3, the facing surface 122 is provided with 90 printing regions, and the printing regions are arranged in a circular shape at equal intervals along the outer edge of the facing surface 122. Each print region was formed in a circular shape having a diameter (width) of 450 μm. The number of the printing regions and the resin structures 123 is not limited to 90, and may be any number.

In each resin structure 123, the dial 13 side surface is covered with a plurality of irregular projections 123-1, 123-2, 123-3, and the like. Each resin structure 123 is formed of an ultraviolet-curable resin having light transmittance and containing an acrylate as a main component, and is colorless and transparent. Each resin structure 123 may be formed of an ultraviolet curable resin having an arbitrary composition that becomes colorless and transparent after curing. In fig. 4 and 5, the irregular shaped projection 123-1 and the like are illustrated as spherical shapes, and the same applies to the drawings other than fig. 7, but the shapes are not limited to spherical shapes.

The opposite surface 122 of the damper member 12 is formed in a flat shape parallel to the dial 13. The front surface 126 of the windshield member 12 is formed to be convex toward the front as shown in fig. 4.

Returning to fig. 1 and 2, the dial 13 is a flat plate-shaped member that displays the time indicated by the hour hand 141, minute hand 142, and second hand 143 and is built in the outer cover 11 so as to be parallel to the facing surface 122 of the windshield member 12. The dial 13 is formed of resin or metal. A1 st welt (see back し)131 having an annular shape is arranged on the front surface of the dial 13 so as to cover the outer edge of the dial 13. Further, a2 nd welt 132 having a cylindrical shape is disposed so as to cover a part of the 1 st welt 131 and the inner periphery of the side surface 112 of the exterior case 11.

The hour hand 141, minute hand 142, and second hand 143 are provided on the front surface of the dial 13, and are driven by the movement 14 provided on the back surface side of the dial 13 so as to indicate the time displayed on the dial 13. The rotation shafts of the hour hand 141, minute hand 142, and second hand 143 are inserted through an hour tube 144, minute tube 145, and second tube 146, which are coaxial, respectively, and connected to the movement 14. The hour hand 141, minute hand 142, and second hand 143 are driven by transmitting rotational force from the movement 14 through a rotation shaft. The movement 14 is a mechanical movement, but may also be a quartz movement. In fig. 2, the components constituting the movement 14 are not shown. The hour hand 141, the minute hand 142, and the second hand 143 are examples of hands.

The crown 15 is a rotatable shaft-like member that is inserted through a crown hole provided on the side surface 112 of the exterior case 11 and connected to the movement 14. In the case of a mechanical timepiece, the rotational force of crown 15 is transmitted to a spring of movement 14 for driving hour hand 141, minute hand 142, and second hand 143 to wind up the spring. The rotational force of the crown 15 is transmitted to the hour hand 141, minute hand 142, and second hand 143 via the movement 14 to rotate the hour hand 141, minute hand 142, and second hand 143, thereby achieving the time adjustment.

Fig. 6 is a flowchart showing an example of a flow of the method for manufacturing the windshield member 12. First, a plurality of droplets of the ultraviolet curable resin having light transmittance are attached to the printing region provided on the opposite surface 122 of the transparent plate 121 (S101). The droplets are deposited by, for example, ejecting them from an ultraviolet curing type ink jet printer. In this case, the position of the print area is stored in the printer in advance in a data form. The printer has a resolution of 1200dpi, and when each print area is circular with a diameter (width) of 450 μm, the printer attaches about 20 to 30 droplets to each print area.

Then, the deposited droplets are irradiated with ultraviolet light in a wavelength range of 200nm to 400nm within 0.5 second from the time of droplet deposition to cure the droplets (S102). Thereby, resin structure 123 having a surface covered with a plurality of irregular projections 123-1 and the like is formed.

That is, the droplets of the ultraviolet curable resin each have a substantially spherical shape before being ejected from the printer and attached to the facing surface 122. Therefore, immediately after the droplets are attached to the print area of the facing surface 122, the droplets are combined into a plurality of substantially spherical droplets, and the surface of the droplets is covered with irregular projections including spherical surfaces. On the other hand, when some time has elapsed since the droplet was attached, the surface tension of the droplet causes the surface to become smooth. The droplets of the ultraviolet curable resin are cured by irradiation with ultraviolet light within 0.5 seconds after the droplets are adhered by the printer, and the surface of the droplets is cured before the surface of the droplets becomes smooth, so that the resin structure 123 having a surface covered with the irregular protruding portion 123-1 and the like is formed.

Fig. 7 is a diagram showing an example of the shape of the resin structure 123. Fig. 7 (a) is a view showing a shape in the case where ultraviolet rays are irradiated within 0.5 seconds from the time when the droplets are attached to the print area. Fig. 7 (b) is a diagram showing, for comparison, the shape of the case where ultraviolet rays are irradiated after 0.5 second has elapsed since the droplets adhered to the print area.

When ultraviolet light is applied within 0.5 second, resin structure 123 has a large number of irregular protrusions 123-1, 123-2, 123-3 including spherical surfaces on the surface, as shown in fig. 7 (a). Thus, the surface of the resin structure 123 has a large number of light reflecting surfaces. Since the resin structure 123 is light-transmitting, when viewed from the front of the windshield member 12, the light reflected by the surface of the resin structure 123 makes the resin structure 123 look dazzling, and the appearance of the multi-surface cut gem is beautiful.

On the other hand, as shown in fig. 7 (b), when ultraviolet rays are irradiated after 0.5 seconds, the resin structure 123 has a smooth surface. Since the resin structure 123 is light-transmitting, the surface of the resin structure 123 appears glossy when viewed from the front of the windshield member 12.

As described above, in the timepiece 1, the windshield member 12 has the translucent resin structure 123 on the facing surface 122 facing the dial 13. The resin structure 123 is formed as follows: the surface is covered with a plurality of irregular protrusions by irradiating ultraviolet rays for curing within 0.5 seconds from the time when a plurality of droplets of ultraviolet-curing resin are attached to the printing region provided on the facing surface 122. Thus, the windshield member 12 can be designed to provide a new aesthetic appearance by virtue of the design applied to the opposite surface 122. That is, the windshield member 12 has a new aesthetic appearance similar to a cut jewel with a plurality of surfaces, which is caused by the resin structure 123 provided on the facing surface 122 appearing to be dazzling when viewed from the front of the windshield member 12.

Further, the resin structure 123 is provided in an outer edge region a1 along the outer edge of the facing surface 122. Thus, the windshield member 12 can provide a new appearance without impairing the visibility of the dial 13.

In the above embodiment, the diameter (width) of each print area is 450 μm, but the present invention is not limited to such an example. For example, each print area may have any size. However, when the diameter of the print area is large, the resin structure 123 formed in the print area appears to have a flat plate shape, and therefore, it is difficult to make the multi-surface cut jewel-like appearance. Therefore, the diameter (width) of the print area is preferably 3.0mm or less. Further, when the diameter of the print area is small, the resin structure 123 is not easily visible. Therefore, the diameter (width) of the print area is preferably 0.2mm or more.

In the above embodiment, the circular print regions are arranged at equal intervals on the facing surface 122, but the present invention is not limited to this example.

Fig. 8 is a front view of another example of the damper member 12. As shown in fig. 8, 90 printing regions are provided on the facing surface 122, and the printing regions are arranged in a circular shape at equal intervals along the outer edge of the facing surface 122. Each print region is formed in a rectangular shape extending in the radial direction of the facing surface 122. The resin structures 123 are formed in rectangular shapes in the respective printing regions. The number of the printing regions and the resin structures 123 is not limited to 90, and may be any number.

Fig. 9 is a front view of another example of the windshield member 12. As shown in fig. 9, the facing surface 122 is provided with 2 circular ring-shaped printing regions having different diameters and extending along the outer edge of the facing surface 122, and the printing regions are arranged concentrically. Resin structures 123 are formed in each printing region in an annular shape. The number of the printing regions and the resin structures 123 is not limited to 2, and may be 1, or 3 or more.

The shape of the print area is not limited to the above embodiment, and may be formed in any shape. For example, a plurality of rectangular or polygonal printing regions may be arranged on the opposite surface 122. The arrangement of the printing regions is not limited to the above embodiment, and may be an arrangement having any shape. The plurality of printing regions may be arranged so that the intervals between adjacent printing regions are different from each other. However, when the width of the print area is large, the resin structure 123 formed in the print area appears to have a flat plate shape, and therefore, it is difficult to make the appearance similar to a multi-surface cut jewel. Therefore, the width of the print area in the short side direction is preferably 3.0mm or less. Further, when the width of the printing region in the short side direction is small, the resin structure 123 is not easily visible. Therefore, the width of the print area in the short side direction is preferably 0.2mm or more.

In the above embodiment, the front surface 126 of the transparent plate 121 is formed to be convex forward, but the present invention is not limited to this example, and the front surface 126 may be formed to be planar.

The facing surface 122 is formed in a flat shape parallel to the dial 13, but may be formed so as to be convex forward or rearward. In general, when the facing surface 122 is not planar, the droplets of the ultraviolet curable resin move by gravity until they adhere to and cure, and the resin structure 123 cannot be appropriately formed in the printing area, which may reduce the manufacturing efficiency. However, in the above embodiment, since the ultraviolet-curable resin is irradiated with ultraviolet light and cured within 0.5 seconds from the adhesion of the liquid droplets, the resin structure 123 can be formed before the liquid droplets move by gravity, and a decrease in manufacturing efficiency can be suppressed.

(embodiment 2)

Fig. 10 is a front view of the windshield member 12a of embodiment 2, fig. 11 is a sectional view of the windshield member 12a, and fig. 12 is a perspective view of the windshield member 12 a. Fig. 11 is a partially enlarged sectional view of the vicinity of the resin structure 123a in the sectional view XI-XI of fig. 10. Fig. 12 is a partially enlarged perspective view of the vicinity of the resin structure 123 a. Since embodiment 2 differs from embodiment 1 only in the configuration of the damper member, only the damper member will be described hereinafter, and the description of the timepiece will be omitted. Note that the same components as those in the above embodiments are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

The windshield member 12a includes a translucent resin structure 123a and a translucent 2 nd resin structure 125a provided on the opposite surface 122 of the transparent plate 121. The 2 nd resin structure 125a is disposed in a droplet shape in 90 2 nd printing regions provided in an outer edge region along an outer edge of the facing surface 122, and the resin structure 123a is disposed in a droplet shape in 90 printing regions provided in the outer edge region. As shown in fig. 10, the 2 nd printing areas are arranged in a circle at equal intervals along the outer edge of the opposite surface 122. Each 2 nd printing region is formed in a circular shape. The print area is formed in a circular ring shape and is provided concentrically with each 2 nd print area so as to surround each 2 nd print area. The number of the print area, the 2 nd print area, the resin structure 123a, and the 2 nd resin structure 125a is not limited to 90, and may be any number.

Each 2 nd resin structure 125a is formed to have a smooth surface. Each 2 nd resin structure 125a is formed so as to be colored and transparent by adding a pigment to an ultraviolet curable resin containing an acrylic ester as a main component. The plurality of resin structures 123a are formed so as to surround each 2 nd resin structure 125 a. Each resin structure 123a is formed by covering the surface with a plurality of irregular projections 123a-1, 123a-2, 123a-3, and the like. Each resin structure 123a is formed so as to be colorless and transparent.

Fig. 13 is a flowchart showing an example of a method for manufacturing a windshield member. First, a plurality of 2 nd droplets of a light-transmissive ultraviolet curable resin are attached to the 2 nd printing region provided on the opposite surface of the transparent plate 121 (S201). The 2 nd droplet is deposited by, for example, ejecting from an ultraviolet curing type ink jet printer.

After 0.5 second and within 5 seconds from the adhesion of the 2 nd droplet, the 2 nd droplet is hardened by irradiating the adhered 2 nd droplet with ultraviolet light (S202). Accordingly, since some time has elapsed from the adhesion of the 2 nd droplet to the irradiation of the ultraviolet ray, the surface of the droplet is smoothed, and thus the 2 nd resin structure 125a having a smooth surface is formed. Further, if a long time has elapsed since the 2 nd droplet was deposited, the 2 nd droplet may diffuse outside the 2 nd printing region, and therefore, the ultraviolet light is irradiated within 5 seconds from the 2 nd droplet being deposited.

Then, a plurality of droplets of the ultraviolet curable resin having translucency are attached to the printing region provided on the opposite surface 122 of the transparent plate 121 (S203). Then, the ultraviolet rays are irradiated to the deposited liquid droplets within 0.5 second from the time of the liquid droplet deposition to cure the liquid droplets (S204). Thereby, a resin structure 123a having a plurality of spherical projections 123a-1 and the like on the surface is formed. Further, S201 and S202 may be executed after S203 and S204 are executed.

As described above, the windshield member 12a has the translucent resin structure 123a and the 2 nd resin structure 125a formed in a predetermined pattern on the facing surface 122 facing the dial 13. The resin structure 123a is formed as follows: the surface is covered with the plurality of irregular protrusions 123a-1 and the like by irradiating ultraviolet rays for curing within 0.5 seconds from the time when the plurality of droplets of ultraviolet-curing resin are attached to the printing region provided on the facing surface 122. The 2 nd resin structure body 125a is formed as follows: the plurality of 2 nd droplets of the ultraviolet curable resin are cured by being irradiated with ultraviolet light within 0.5 seconds to 5 seconds from the time when the plurality of 2 nd droplets are adhered to the 2 nd print area provided on the facing surface 122, and thus have a smooth surface. The print area is provided so as to surround the 2 nd print area, and the resin structure 123a is formed so as to surround the 2 nd resin structure 125a on the facing surface 122. Thus, in the windshield member 12a, the 2 nd resin member 125a having gloss is surrounded by the resin structure 123a which is dazzlingly glittering, and therefore, new aesthetic properties can be created.

In the above embodiment, the print region has a circular ring shape and the 2 nd print region has a circular shape, but the present invention is not limited to such an example. The print area and the 2 nd print area may be formed in any shape. For example, the 2 nd printing region may have a rectangular shape, and the printing region may have a polygonal ring shape surrounding the 2 nd printing region.

In the above embodiment, the print area is provided so as to surround the 2 nd print area, but is not limited to such an example. For example, the print area and the 2 nd print area may be overlapped with each other.

Fig. 14 is a sectional view of the windshield member 12a in a case where the print area and the 2 nd print area are provided in an overlapping manner. Fig. 14 (a) to (c) are partially enlarged sectional views of the resin structure 123a and the 2 nd resin structure 125a in the vicinity thereof. For example, the print area may coincide with the 2 nd print area. In this case, as shown in fig. 14 (a), the 2 nd resin structure 125a is formed so as to cover the entire resin structure 123 a.

Fig. 15 is a flowchart showing an example of a flow of the method for manufacturing the windshield member 12a shown in fig. 14 (a). First, a plurality of droplets of the ultraviolet curable resin having light transmittance are attached to the printing region provided on the opposite surface 122 of the transparent plate 121 (S301). Then, the ultraviolet rays are irradiated to the deposited droplets within 0.5 second from the time of droplet deposition to cure the droplets (S302), thereby forming the resin structure 123 a. Then, a plurality of 2 nd droplets of the light-transmissive ultraviolet curable resin are attached to the 2 nd printing region where the resin structure 123a is formed (S303). After 0.5 second and within 5 seconds from the adhesion of the 2 nd droplet, the 2 nd droplet is irradiated with ultraviolet light to cure the 2 nd droplet (S304), thereby forming the 2 nd resin structure 125 a. That is, the windshield member 12a is formed by attaching the 2 nd droplet after the resin structure 123a is formed.

The relationship between the print area and the 2 nd print area is not limited to the above example. For example, the 2 nd printing region may be set to include a printing region. In this case, as shown in fig. 14 (b), the 2 nd resin structure 125a is formed so as to integrally cover the entire resin structure 123a and the region of the facing surface 122 surrounding the resin structure 123 a. Further, the 2 nd printing region may be provided so as to be included in the printing region. In this case, as shown in fig. 14 (c), the 2 nd resin structure 125a is formed so as to cover the resin structure 123a except for a portion along the outer edge.

Fig. 16 is a sectional view of the windshield member 12a in a case where the print area and the 2 nd print area are provided in an overlapping manner. When the print area coincides with the 2 nd print area, as shown in fig. 16 (a), the resin structure 123a may be formed to cover the entire 2 nd resin structure 125 a.

Fig. 17 is a flowchart showing an example of the method for manufacturing the windshield member 12a shown in fig. 16 (a). First, a plurality of 2 nd droplets of a light-transmitting ultraviolet curable resin are attached to the 2 nd printing region provided on the opposite surface 122 of the transparent plate 121 (S401). After 0.5 second and within 5 seconds from the adhesion of the 2 nd droplet, the 2 nd droplet is irradiated with ultraviolet light to cure the 2 nd droplet (S402), thereby forming the 2 nd resin structure 125 a. Then, a plurality of droplets of the light-transmitting ultraviolet curable resin are attached to the printing region where the 2 nd resin structure 125a is formed (S403). Then, the ultraviolet rays are irradiated to the deposited droplets within 0.5 second from the time of droplet deposition to cure the droplets (S404), thereby forming the resin structure 123 a. That is, the windshield member 12a is formed by attaching liquid droplets after the 2 nd resin structure 125a is formed.

In the case where the 2 nd resin structure 125a is covered with the resin structure 123a, the relationship between the print area and the 2 nd print area is not limited to the above example. For example, the 2 nd printing region may be set to be included in the printing region. In this case, as shown in fig. 16 (b), the resin structure 123a is formed so as to integrally cover the entire 2 nd resin structure 125a and the region of the facing surface 122 surrounding the 2 nd resin structure 125 a. Further, the 2 nd printing region may be set to include a printing region. In this case, as shown in fig. 16 (c), resin structure 123a is formed so as to cover resin structure 125a of the 2 nd position except for a portion along the outer edge.

Thus, in the windshield member 12a, the 2 nd resin structure 125a having a glossy colored transparent surface and the colorless transparent resin structure 123a having an attractive glittering surface are superimposed, and therefore, a new appearance is created.

(embodiment 3)

Fig. 18 is a front view of the timepiece 1b according to embodiment 3. The timepiece 1b has an exterior case 11, a windshield member 12b, a dial 13b, a movement 14, an hour hand 141, a minute hand 142, a second hand 143, a small hand 147b, a button 148b, a crown 15, and the like.

The dial 13b is a flat plate-shaped member that displays the time indicated by the hour hand 141, minute hand 142, and second hand 143, and is built in the outer case 11 so as to be parallel to the facing surface 122 of the windshield member 12 b. A1 st welt 131 having an annular shape is disposed on the front surface of the dial 13b so as to cover the outer edge of the dial 13 b. Further, a2 nd welt 132 having a cylindrical shape is disposed so as to cover a part of the 1 st welt 131 and the inner periphery of the side surface 112 of the exterior case 11.

A small display area 133b having a circular shape is provided on the front surface of the dial 13 b. A small needle 147b is provided in the small display region 133b with the center of the small display region 133b as a rotation axis. The small needle 147b is a timer needle that counts time by rotating or stopping as the button 148b is pressed. The small hand 147b may also be a small second hand (small second) indicating seconds.

Fig. 19 is a front view of the windshield member 12b, and fig. 20 is a sectional view of the windshield member 12 b. Fig. 20 is a cross-sectional view of section XX-XX of fig. 19.

The windshield member 12b includes a transparent plate 121 and a translucent resin structure 123b provided on the opposite surface 122 of the transparent plate 121 facing the dial 13 b. The resin structures 123b are arranged in the form of droplets in 60 circular printing regions provided at equal intervals in the outer edge region along the outer edge of the facing surface 122. The resin structures 123b are arranged in the form of droplets in 24 circular print areas provided at equal intervals along the outer edge of the small area a2 facing the small display area 133b when the windshield member 12b is attached to the timepiece 1 b. The number of the printing regions provided in the outer edge region and the small region may be any number.

In each resin structure 123b, the dial 13b side surface is covered with a plurality of irregular projections. Each of the resin structures 123b is formed of an ultraviolet-curable resin having light transmittance and containing an acrylate as a main component so as to be colorless and transparent. Each resin structure 123b may be formed of an ultraviolet curable resin having an arbitrary component that becomes colorless and transparent after curing. A part or the whole of the resin structure 123b may be formed to be colored and transparent. For example, only the resin structure 123b provided in the small region a2 may be formed so as to be colored and transparent.

The resin structure 123b is formed by adhering a plurality of droplets of a light-transmitting ultraviolet-curable resin to the small region a2 of the facing surface 122, and irradiating the adhered droplets with ultraviolet light within 0.5 seconds from the adhesion of the droplets to cure the droplets. Thus, the windshield member 12b has the resin structure 123b so as to surround the small display region 133b when viewed from the front, and a new aesthetic appearance similar to a multi-surface cut jewel can be created around the small display region 133 b.

In the above description, resin structure 123b is provided in the outer edge region and the small region, but the present invention is not limited to this example, and resin structure 123b may be provided only in the small region. The dial 13b has one small display area 133b, but may have a plurality of small display areas 133 b. In this case, the resin structure 123b may be provided in each of the plurality of small regions opposed to the plurality of small display regions 133b, or may be provided only in a part of the small regions.

It should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention. The above-described embodiments and modifications can be implemented in combination as appropriate within the scope of the present invention.

Description of the symbols

1 … clock

11 … external decorative shell

12 … windshield member

121 … transparent plate

122 … opposite side

123 … resin structure

13 … Dial plate

141 hour hand (141 …)

142 … minute hand

143 … second hand.

Claims (10)

1. A method of manufacturing a windshield member to be mounted on a front surface of an exterior case of a timepiece, the method comprising:

a plurality of droplets of a light-transmitting ultraviolet-curing resin are adhered to a printed area provided on a surface of a transparent plate formed in a flat plate shape, the surface being opposed to a dial of the timepiece,

the deposited droplets are irradiated with ultraviolet rays and cured, thereby forming a light-transmitting resin structure in which the surface on the dial side is covered with a plurality of irregular protrusions.

2. The method of manufacturing a windshield member according to claim 1,

the print region is disposed in a peripheral edge region along a peripheral edge of the one face.

3. The method of manufacturing a windshield member according to claim 1 or 2,

the printing area is formed to have a width of 3.0mm or less.

4. The manufacturing method of a windshield member according to any one of claims 1 to 3,

in forming the resin structure, ultraviolet rays are irradiated within 0.5 seconds from the adhesion of the droplets.

5. The method of manufacturing a windshield member of claim 4, further comprising:

a plurality of 2 nd droplets of a light-transmitting ultraviolet-curing resin are made to adhere to the 2 nd printing area provided on the one surface,

after 0.5 second and within 5 seconds from the adhesion of the 2 nd droplet, the adhered 2 nd droplet is irradiated with ultraviolet light and cured, thereby forming a2 nd translucent resin structure.

6. The method of manufacturing a windshield member according to claim 5,

the printing area is disposed to surround the 2 nd printing area.

7. The method of manufacturing a windshield member according to claim 5,

overlapping the print area and the 2 nd print area,

the 2 nd droplet is attached after the resin structure is formed.

8. The method of manufacturing a windshield member according to claim 5,

overlapping the print area and the 2 nd print area,

the droplets are attached after the 2 nd resin structure is formed.

9. A windshield member to be mounted on a front surface of an exterior case of a timepiece, comprising:

a transparent plate formed in a flat plate shape; and

and a plurality of light-transmitting resin structures disposed on a surface of the transparent plate facing the dial of the timepiece, wherein the surface of the transparent plate on the dial side is covered with a plurality of irregular protrusions.

10. A timepiece, comprising:

an outer decorative shell;

the windshield member of claim 9, disposed on a front face of the outer cover shell;

a dial plate which is internally disposed in the outer decorative case and is disposed opposite to one surface of the windshield member; and

and a pointer which is provided on the front surface of the dial and is driven so as to indicate time.

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