Manufacturing methods of windshield components, windshield components, and clocks

Abstract

The present invention provides a windshield component and a clock, wherein the method for manufacturing the windshield component is a method for manufacturing a windshield component installed on the front of the outer casing of a clock, comprising: attaching a plurality of droplets of a translucent ultraviolet-curable resin to a printing area provided on a side of a transparent plate formed in the shape of a flat plate opposite to the dial of the clock, and irradiating the attached droplets with ultraviolet light to harden them, thereby forming a translucent resin structure on the dial side surface covered by a plurality of amorphous protrusions.

Description

Technical Field

[0001] This invention relates to a method for manufacturing a windshield component, the windshield component itself, and a clock. Background Technology

[0002] In the past, to enhance the aesthetics of watches, the opposing surface of the watch windshield, opposite the dial, was printed. For example, Patent Document 1 describes a windshield that uses an ultraviolet-curable transparent resin and a colorant to print the same hue onto the opposing surface. [Existing Technical Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 59-19879 Summary of the Invention

[0004] According to Patent Document 1, a transparent printing effect can be applied to the opposing surface. On the other hand, with the diversification of watch designs, the industry is seeking new aesthetics in windshield components by implementing designs on the opposing surface.

[0005] The present invention was made to solve the above-mentioned problems, and its object is to provide a method for manufacturing a windshield member, a windshield member, and a clock that can produce new aesthetics by designing the surface opposite to the dial of the clock.

[0006] The windshield component manufacturing method of the present invention is a method for manufacturing a windshield component installed on the front of the outer casing of a watch, characterized in that it includes: attaching a plurality of droplets of a translucent ultraviolet-curable resin to a printing area provided on a side of a transparent plate formed in the shape of a flat plate opposite to the dial of the watch, and irradiating the attached droplets with ultraviolet light to harden them, thereby forming a translucent resin structure whose dial-side surface is covered by a plurality of amorphous protrusions.

[0007] Furthermore, in the method for manufacturing the windshield component of the present invention, it is preferable that the printing area is located in the outer edge region along the outer edge of one side.

[0008] Furthermore, in the manufacturing method of the windshield component of the present invention, it is preferable that the printing area is formed to have a width of 3.0 mm or less.

[0009] Furthermore, in the manufacturing method of the windshield component of the present invention, it is preferable to irradiate with ultraviolet light within 0.5 seconds from the time the droplet adheres during the formation of the resin structure.

[0010] Furthermore, the method for manufacturing the windshield component of the present invention preferably further includes: attaching a plurality of second droplets of a light-transmitting ultraviolet-curable resin to a second printing area provided on one side, and irradiating the attached second droplets with ultraviolet light for 0.5 seconds and within 5 seconds after the second droplets are attached to harden them, thereby forming a light-transmitting second resin structure.

[0011] Furthermore, in the method for manufacturing the windshield component of the present invention, it is preferable that the printing area is arranged to surround the second printing area.

[0012] Furthermore, in the method for manufacturing the windshield component of the present invention, it is preferable to overlap the printing area and the second printing area, and attach the second droplet after the resin structure is formed.

[0013] Furthermore, in the method for manufacturing the windshield component of the present invention, it is preferable to overlap the printing area and the second printing area, and to attach droplets after the second resin structure is formed.

[0014] The windshield member of the present invention is a windshield member installed on the front of the outer casing of a watch, characterized in that it has: a transparent plate formed in the shape of a flat plate; and a light-transmitting resin structure having a plurality of such structures disposed on the side of the transparent plate opposite to the dial of the watch, wherein the surface of the dial side of the resin structure is covered by a plurality of irregular protrusions.

[0015] The clock of the present invention is characterized by having: an outer casing; a windshield member of the present invention, which is mounted on the front of the outer casing; a dial, which is built into the outer casing and disposed opposite to one side of the windshield member; and a hand disposed on the front of the dial and driven in a manner to indicate the time.

[0016] The windshield component manufacturing method, windshield component, and clock of the present invention can produce new aesthetics by designing the surface opposite to the clock face. Attached Figure Description

[0017] Figure 1 This is the front view of clock 1. Figure 2 This is a cross-sectional view of clock 1. Figure 3 This is the front view of the windshield component 12. Figure 4 This is a cross-sectional view of windshield component 12. Figure 5 This is a partially enlarged cross-sectional view of the windshield component 12. Figure 6 A flowchart illustrating an example of the manufacturing process of windshield component 12. Figure 7 A diagram showing an example of the shape of the resin structure 123. Figure 8 This is the front view of the windshield component 12. Figure 9 This is the front view of the windshield component 12. Figure 10 This is the front view of windshield component 12a. Figure 11 This is a partially enlarged cross-sectional view of the windshield component 12a. Figure 12 This is a partially enlarged perspective view of the windshield component 12a. Figure 13 A flowchart illustrating an example of a method for manufacturing windshield component 12a. Figure 14 This is a partially enlarged cross-sectional view of the windshield component 12a. Figure 15 A flowchart illustrating an example of a method for manufacturing windshield component 12a. Figure 16 This is a partially enlarged cross-sectional view of the windshield component 12a. Figure 17 A flowchart illustrating an example of a method for manufacturing windshield component 12a. Figure 18 This is the front view of clock 1b. Figure 19 This is the front view of windshield component 12b. Figure 20 This is a cross-sectional view of windshield component 12b. Detailed Implementation

[0018] Various embodiments of the present invention will now be described with reference to the accompanying drawings. However, please note that the scope of the present invention is not limited to these embodiments, but covers the invention described herein and its equivalents.

[0019] (First Embodiment) Figure 1 This is a front view of clock 1 according to the first embodiment. Figure 2 This is a cross-sectional view of clock 1. Figure 2 for Figure 1 The cross-sectional view of section II-II. Furthermore, Figure 2 The diagrams of components visible from the cross-section inwards are omitted in the first section, and the same applies to subsequent cross-sectional views. Furthermore, later text may sometimes use... Figure 2 The area above is called the front. Figure 2 The lower part of the clock face is called the back. Additionally, the side of the clock 1 facing forward is sometimes called the front, and the side facing backward is called the back. The clock 1 includes an outer case 11, a windshield component 12, a dial 13, a movement 14, an hour hand 141, a minute hand 142, a second hand 143, and a crown 15.

[0020] The outer casing 11 is formed in the shape of a flat, generally circular plate and is a component of the dial 13 and movement 14 of the built-in clock. The outer casing 11 is formed by an annular bezel 111 provided on the front, a back cover 113 provided on the back, and a side 112 that joins the bezel 111 and the back cover 113.

[0021] The bezel 111 is bonded to the upper part of the side panel 112 by means of an adhesive member 114, which is an adhesive. The lower part of the side panel 112 is bonded to the back cover 113 by means of an adhesive member 115, which is an adhesive. A grip portion 116 for holding the watch strap is formed in a part of the side panel 112. In addition, a crown hole for inserting the crown 15 is formed in a part of the side panel 112.

[0022] The bezel 111, sides 112, and case back 113 are made of stainless steel. The bezel 111, sides 112, and case back 113 may also be made of other metals such as titanium, titanium alloys, gold, or resin.

[0023] The windshield member 12 is mounted on the front of the outer casing 11, surrounded by the bezel 111. The windshield member 12 has a transparent plate 121 formed in the shape of a disc and a light-transmitting resin structure 123 disposed on the opposing surface 122 of the transparent plate 121 opposite to the dial 13. The transparent plate 121 is formed of sapphire glass or polycarbonate (transparent resin). The transparent plate 121 may also be formed of other glass such as inorganic glass. The transparent plate 121 is bonded to the front of the side 112 by means of an adhesive member 124 acting as an adhesive, covering the dial 13, the hour hand 141, the minute hand 142, and the second hand 143, thereby protecting these components while allowing them to be viewed from the front. An anti-reflective film formed of silicon dioxide or magnesium fluoride may also be provided on the opposing surface 122, and the resin structure 123 may be provided on the anti-reflective film.

[0024] Figure 3 This is the front view of windshield component 12. Figure 4 and Figure 5 This is a cross-sectional view of windshield component 12. Figure 4 for Figure 3 Cross-sectional view of section IV-IV. Figure 5 To be Figure 4 A magnified cross-sectional view of the vicinity of the resin structure 123.

[0025] The resin structure 123 is arranged in droplet shape within a plurality of printing areas set along the outer edge region A1 of the opposing surface 122. The outer edge region A1 is the area where the distance R2 from the center C of the opposing surface 122 is greater than 85% of the radius R1 of the opposing surface 122. For example... Figure 3As shown, 90 printing areas are provided on the opposing surface 122, and each printing area is arranged in a circular pattern at equal intervals along the outer edge of the opposing surface 122. Each printing area is formed into a circle with a diameter (width) of 450 μm. Furthermore, the number of printing areas and resin structures 123 is not limited to 90, and can be any number.

[0026] In each resin structure 123, the surface of the dial 13 side is covered by multiple amorphous protrusions 123-1, 123-2, 123-3, etc. Each resin structure 123 is formed in a colorless and transparent manner from a UV-cured resin with light transmittance and primarily composed of acrylate. Each resin structure 123 can be formed from any UV-cured resin that becomes colorless and transparent after curing. Furthermore, Figure 4 and Figure 5 In the diagram, the amorphous protrusions 123-1, etc., are illustrated in a spherical form, except... Figure 7 The same applies to other accompanying figures, but the shape is not limited to a spherical shape.

[0027] The opposing surface 122 of the windshield member 12 is formed as a plane parallel to the dial 13. The front view 126 of the windshield member 12 is shown. Figure 4 It is formed in a forward-convex manner as shown.

[0028] Return to Figure 1 and Figure 2 The dial 13 is a flat plate-shaped component that displays the time indicated by the hour hand 141, minute hand 142, and second hand 143, and is housed within the outer casing 11 parallel to the opposing surface 122 of the windshield member 12. The dial 13 is formed of resin or metal. A first annular edge 131 is arranged on the front of the dial 13 to cover the outer edge of the dial 13. Furthermore, a second cylindrical edge 132 is arranged to cover a portion of the first edge 131 and the inner periphery of the side surface 112 of the outer casing 11.

[0029] The hour hand 141, minute hand 142, and second hand 143 are located on the front of the dial 13 and are driven by the movement 14 located on the back of the dial 13 to indicate the time displayed on the dial 13. The pivots of the hour hand 141, minute hand 142, and second hand 143 are respectively inserted into coaxial hour hand tubes 144, minute hand tube 145, and second hand tube 146 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 via the pivots. The movement 14 is a mechanical movement, but it can also be a quartz movement. Furthermore, Figure 2 The diagrams of the components that make up the movement 14 are omitted. Furthermore, the hour hand 141, minute hand 142, and second hand 143 are examples of hands.

[0030] The crown 15 is a rotatable shaft-like component that inserts into a crown hole provided on the side 112 of the outer case 11 and connects to the movement 14. In the case of a mechanical watch, the rotational force of the crown 15 is transmitted to the mainspring of the movement 14, which drives the hour hand 141, minute hand 142, and second hand 143, thereby winding the mainspring. In addition, the rotational force of the crown 15 is transmitted via the movement 14 to the hour hand 141, minute hand 142, and second hand 143, causing them to rotate to achieve time setting.

[0031] Figure 6 This is a flowchart illustrating an example of the manufacturing process of the windshield component 12. First, multiple droplets of a translucent, ultraviolet-curable resin are attached to a printing area (S101) on the opposing surface 122 of the transparent plate 121. The droplets are attached, for example, by being ejected from an ultraviolet-curable inkjet printer. In this case, the positions of the printing areas are pre-stored in the printer as data. With a printer resolution of 1200 dpi, and each printing area being a circle with a diameter (width) of 450 μm, the printer attaches approximately 20 to 30 droplets to each printing area.

[0032] Then, within 0.5 seconds of the droplet attaching, the attached droplet is irradiated with ultraviolet light in the 200nm to 400nm wavelength band to harden the droplet (S102). As a result, a resin structure 123 is formed with its surface covered by multiple amorphous protrusions 123-1, etc.

[0033] That is, the droplets of UV-curable resin each have a generally spherical shape from the time they are ejected from the printer until they adhere to the opposing surface 122. Therefore, immediately after these droplets adhere to the printing area of ​​the opposing surface 122, multiple generally spherical droplets combine, thus forming droplets whose surface is covered with amorphous protrusions, including spherical shapes. On the other hand, as some time passes after the droplets adhere, the surface tension of the droplets causes the surface to become smooth. By irradiating the multiple droplets of UV-curable resin with ultraviolet light for less than 0.5 seconds after they adhere to the printer, the droplets harden before their surface becomes smooth, thus forming a resin structure 123 whose surface is covered with amorphous protrusions 123-1, etc.

[0034] Figure 7 A diagram showing an example of the shape of the resin structure 123. Figure 7 (a) is a diagram showing the shape of the droplet when it is exposed to ultraviolet light within 0.5 seconds of adhering to the printing area. Figure 7 (b) is a diagram showing the shape of the droplet after 0.5 seconds of UV exposure following its attachment to the printed area for comparison.

[0035] like Figure 7As shown in (a), when exposed to ultraviolet light for less than 0.5 seconds, the resin structure 123 has numerous irregularly shaped protrusions 123-1, 123-2, 123-3, etc., including spherical shapes, on its surface. Therefore, the surface of the resin structure 123 has numerous light-reflecting surfaces. Since the resin structure 123 is translucent, when viewed from the front of the windshield member 12, the light reflected from the surface of the resin structure 123 makes it appear dazzling, thus producing a multi-faceted, gem-like aesthetic.

[0036] On the other hand, such as Figure 7 As shown in (b), after being irradiated with ultraviolet light for 0.5 seconds, the resin structure 123 has a smooth surface. The resin structure 123 is translucent, therefore, when viewed from the front of the windshield member 12, the surface of the resin structure 123 exhibits a glossy appearance.

[0037] As explained above, in watch 1, the windshield member 12 has a translucent resin structure 123 on its opposing surface 122, which faces the dial 13. The resin structure 123 is formed such that it is hardened by ultraviolet light within 0.5 seconds after multiple droplets of UV-cured resin adhere to a printed area on the opposing surface 122, thereby covering the surface with multiple amorphous protrusions. Thus, the windshield member 12 can achieve a new aesthetic appeal through the design implemented on the opposing surface 122. Specifically, the resin structure 123 on the opposing surface 122 creates a dazzling, multifaceted, gem-like aesthetic when viewed from the front of the windshield member 12.

[0038] Furthermore, the resin structure 123 is disposed within the outer edge region A1 along the outer edge of the opposing surface 122. As a result, the windshield member 12 can produce a new aesthetic without compromising the visibility of the dial 13.

[0039] In the above embodiment, the diameter (width) of each printed area is 450 μm, but this is not a limited example. For example, each printed area can have any size. However, when the diameter of the printed area is large, the resin structure 123 formed within the printed area appears to have a flat shape, making it difficult to produce the aesthetic appeal of a faceted gemstone. Therefore, the diameter (width) of the printed area is preferably 3.0 mm or less. Furthermore, when the diameter of the printed area is small, the resin structure 123 is not easily visible. Therefore, the diameter (width) of the printed area is preferably 0.2 mm or more.

[0040] In the above embodiment, circular printing areas are arranged at equal intervals on the opposing surface 122, but this is not a limited example.

[0041] Figure 8 This is a front view of another example of windshield component 12. (See example...) Figure 8 As shown, 90 printing areas are provided on the opposing surface 122, and each printing area is arranged in a circular pattern at equal intervals along the outer edge of the opposing surface 122. Each printing area is formed into a rectangular shape extending radially along the opposing surface 122. Resin structures 123 are formed in rectangular shapes within each printing area. Furthermore, the number of printing areas and resin structures 123 is not limited to 90, and can be any number.

[0042] Figure 9 This is a front view of another example of windshield component 12. (See example...) Figure 9 As shown, two annular printing areas of different diameters are provided on the opposing surface 122, arranged concentrically along the outer edge of the opposing surface 122. Resin structures 123 are formed in annular shapes within each printing area. Furthermore, the number of printing areas and resin structures 123 is not limited to two; it can be one or more.

[0043] Furthermore, the shape of the printing area is not limited to the above-described embodiment and can be formed in any shape. For example, multiple rectangular or polygonal printing areas can be arranged on the opposing surface 122. Furthermore, the arrangement of the printing areas is not limited to the above-described embodiment and can be arranged in any shape. Additionally, multiple printing areas can be arranged with different intervals from adjacent printing areas. However, when the width of the printing area is large, the resin structure 123 formed within the printing area appears flat, making it difficult to achieve the aesthetic appeal of a faceted gemstone. Therefore, the width of the printing area in the short side direction is preferably 3.0 mm or less. Furthermore, when the width of the printing area in the short side direction is small, the resin structure 123 is not easily visible. Therefore, the width of the printing area in the short side direction is preferably 0.2 mm or more.

[0044] In the above embodiment, the front surface 126 of the transparent plate 121 is formed in a forward-convex manner, but it is not limited to such an example, and the front surface 126 may also be formed as a planar shape.

[0045] Furthermore, the opposing surface 122 is formed as a flat surface parallel to the dial 13, but it can also be formed in a way that protrudes forward or backward. Generally, when the opposing surface 122 is not flat, the droplet will move under gravity during the period from the attachment of the UV-curable resin droplet to its hardening, making it impossible to properly form the resin structure 123 in the printing area, thus potentially reducing manufacturing efficiency. However, in the above embodiment, the UV-curable resin is irradiated with ultraviolet light within 0.5 seconds of the droplet's attachment to harden it, thus forming the resin structure 123 before the droplet moves due to gravity, thereby suppressing the reduction in manufacturing efficiency.

[0046] (Second Implementation) Figure 10 This is a front view of the windshield member 12a according to the second embodiment. Figure 11 This is a cross-sectional view of windshield component 12a. Figure 12 This is a perspective view of windshield component 12a. Figure 11 Is Figure 10 The cross-sectional view of section XI-XI shows a magnified view of the area near resin structure 123a. Figure 12 This is a partially enlarged perspective view of the area near the resin structure 123a. Furthermore, the second embodiment differs from the first embodiment only in the construction of the windshield member; therefore, only the windshield member will be described below, omitting descriptions related to the clock. Additionally, components identical to those in the above embodiment will be labeled with the same symbols, and descriptions will be omitted as appropriate.

[0047] The windshield member 12a has a light-transmitting resin structure 123a and a light-transmitting second resin structure 125a disposed on the opposing surface 122 of the transparent plate 121. The second resin structure 125a is arranged in a droplet shape within 90 second printing areas provided along the outer edge region of the opposing surface 122, and the resin structure 123a is also arranged in a droplet shape within the 90 printing areas provided along the outer edge region. Figure 10 As shown, the second printing areas are arranged in a circular pattern at equal intervals along the outer edge of the opposing surface 122. Each second printing area is formed in a circular shape. Furthermore, the printing areas are formed in annular shape and are concentrically arranged around each second printing area. Moreover, the number of printing areas, second printing areas, resin structures 123a, and second resin structures 125a is not limited to 90, and can be any number.

[0048] Each second resin structure 125a is formed with a smooth surface. Each second resin structure 125a is formed in a colored and transparent manner by adding pigments to an ultraviolet-cured resin mainly composed of acrylate. Multiple resin structures 123a are formed surrounding each second resin structure 125a. Each resin structure 123a is formed by covering its surface with multiple amorphous protrusions 123a-1, 123a-2, 123a-3, etc. Each resin structure 123a is formed in a colorless and transparent manner.

[0049] Figure 13 This is a flowchart illustrating an example of a method for manufacturing a windshield component. First, multiple second droplets of a translucent, ultraviolet-curable resin are attached to a second printing area (S201) provided on the opposing surface of a transparent plate 121. The second droplets are attached, for example, by being ejected from an ultraviolet-curable inkjet printer.

[0050] Then, within 0.5 seconds but no more than 5 seconds after the second droplet adheres, ultraviolet light is irradiated onto the adhered second droplet to harden it (S202). Thus, a certain amount of time has passed from the adhesion of the second droplet to the irradiation of ultraviolet light, allowing the surface of the droplet to become smooth, thereby forming a second resin structure 125a with a smooth surface. Furthermore, if a longer time has passed since the second droplet adheres, there is a possibility that the second droplet may diffuse outside the second printing area; therefore, ultraviolet light must be irradiated within 5 seconds of the second droplet's adhesion.

[0051] Then, multiple droplets of translucent, ultraviolet-curable resin are attached to a printing area provided on the opposing surface 122 of the transparent plate 121 (S203). Then, ultraviolet light is irradiated onto the attached droplets within 0.5 seconds of attachment to harden the droplets (S204). This forms a resin structure 123a with multiple spherical protrusions 123a-1 on its surface. Alternatively, S201 and S202 can be performed after S203 and S204.

[0052] As explained above, the windshield member 12a has a translucent resin structure 123a and a second resin structure 125a formed in a predetermined pattern on the opposing surface 122 opposite to the dial 13. The resin structure 123a is formed such that it is hardened by irradiation with ultraviolet light within 0.5 seconds after multiple droplets of ultraviolet-curable resin adhere to a printing area provided on the opposing surface 122, thereby covering the surface with multiple amorphous protrusions 123a-1, etc. The second resin structure 125a is formed such that it is hardened by irradiation with ultraviolet light within 0.5 seconds to 5 seconds after multiple second droplets of ultraviolet-curable resin adhere to a second printing area provided on the opposing surface 122, thereby having a smooth surface. The printing area is arranged around the second printing area, and the resin structure 123a is formed around the second resin structure 125a on the opposing surface 122. Thus, in the windshield component 12a, the glossy second resin component 125a is surrounded by the dazzling resin structure 123a, thereby creating a new aesthetic.

[0053] In the above embodiments, the printing area has a ring shape and the second printing area has a circular shape, but this is not a limited example. The printing area and the second printing area can also be formed in any shape. For example, the second printing area can be rectangular, and the printing area can be a polygonal ring shape surrounding the second printing area.

[0054] In the above embodiment, the printing area is arranged to surround the second printing area, but this is not a limited example. For example, the printing area and the second printing area may also be arranged to overlap.

[0055] Figure 14 A cross-sectional view of the windshield member 12a with overlapping printing areas and a second printing area. Figure 14 Images (a) to (c) are magnified cross-sectional views of the vicinity of resin structure 123a and the second resin structure 125a. For example, the printing area may coincide with the second printing area. In this case, such as... Figure 14 As shown in (a), the second resin structure 125a is formed as the entirety of the coated resin structure 123a.

[0056] Figure 15 To indicate Figure 14 The flowchart of an example of the manufacturing method of the windshield member 12a shown in (a) is as follows: First, multiple droplets of light-transmitting ultraviolet-curable resin are attached to a printing area provided on the opposing surface 122 of the transparent plate 121 (S301). Then, within 0.5 seconds from the time of attachment, ultraviolet light is irradiated onto the attached droplets to harden them (S302), forming a resin structure 123a. Then, multiple second droplets of light-transmitting ultraviolet-curable resin are attached to a second printing area on which the resin structure 123a is formed (S303). Then, within 0.5 seconds and 5 seconds after the second droplet is attached, ultraviolet light is irradiated onto the attached second droplet to harden it (S304), forming a second resin structure 125a. That is, the windshield member 12a is formed by attaching a second droplet after the resin structure 123a is formed.

[0057] The relationship between the printing area and the second printing area is not limited to the examples above. For instance, the second printing area may also be configured to include the printing area. In this case, such as... Figure 14 As shown in (b), the second resin structure 125a is formed to integrally cover the entire resin structure 123a and the area surrounding the opposing surface 122 of the resin structure 123a. Furthermore, the second printing area may also be configured to be contained within the printing area. In this case, as... Figure 14 As shown in (c), the second resin structure 125a is formed such that it is covered with resin structure 123a except for the portion along the outer edge.

[0058] Figure 16 A cross-sectional view of the windshield member 12a with overlapping printing areas and a second printing area. When the printing area coincides with the second printing area, as shown... Figure 16 As shown in (a), the second resin structure 125a can be formed by covering the entire resin structure 123a with the resin structure 123a.

[0059] Figure 17 To indicate Figure 16A flowchart of an example of a method for manufacturing the windshield member 12a shown in (a) is provided. First, a plurality of second droplets of a light-transmitting, ultraviolet-curable resin are attached to a second printing area provided on the opposing surface 122 of the transparent plate 121 (S401). Then, within 0.5 seconds but less than 5 seconds after the second droplets are attached, ultraviolet light is irradiated onto the attached second droplets to harden them (S402), forming a second resin structure 125a. Then, a plurality of droplets of light-transmitting, ultraviolet-curable resin are attached to the printing area on which the second resin structure 125a is formed (S403). Then, within 0.5 seconds after the droplets are attached, ultraviolet light is irradiated onto the attached droplets to harden them (S404), forming a resin structure 123a. That is, the windshield member 12a is formed by attaching droplets after the second resin structure 125a is formed.

[0060] When the resin structure 123a is covered by the second resin structure 125a, the relationship between the printed area and the second printed area is not limited to the example described above. For example, the second printed area may also be configured to be included within the printed area. In this case, such as Figure 16 As shown in (b), the resin structure 123a is formed to integrally cover the entirety of the second resin structure 125a and the area surrounding the opposing surface 122 of the second resin structure 125a. Furthermore, the second printing area may also be configured to include the printing area. In this case, as... Figure 16 As shown in (c), the resin structure 123a is formed to be covered with the second resin structure 125a except for the portion along the outer edge.

[0061] Thus, in the windshield component 12a, a second resin structure 125a with a glossy, colored, transparent surface is overlapped with a colorless, transparent resin structure 123a with a dazzling surface, thereby creating a new aesthetic.

[0062] (Third Implementation) Figure 18 This is a front view of the clock 1b according to the third embodiment. The clock 1b includes an outer casing 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, pushers 148b, a crown 15, etc.

[0063] The dial 13b is a flat member that displays the time indicated by the hour hand 141, minute hand 142, and second hand 143, and is housed within the outer casing 11 in a manner parallel to the opposing surface 122 of the windshield member 12b. A first annular flange 131 is arranged on the front of the dial 13b, covering its outer edge. Furthermore, a second cylindrical flange 132 is arranged, covering a portion of the first flange 131 and the inner periphery of the side surface 112 of the outer casing 11.

[0064] A small circular display area 133b is provided on the front of the dial 13b. A small hand 147b is located within the small display area 133b, rotating around its center. The small hand 147b is a timer hand that rotates or stops when the button 148b is pressed. The small hand 147b can also be a small second hand.

[0065] Figure 19 This is the front view of windshield component 12b. Figure 20 This is a cross-sectional view of windshield component 12b. Figure 20 for Figure 19 Cross-sectional view of section XX-XX.

[0066] The windshield member 12b has a transparent plate 121 and a light-transmitting resin structure 123b disposed on the opposing surface 122 of the transparent plate 121 opposite to the dial 13b. The resin structure 123b is arranged in droplet shape in 60 circular printing areas, which are equally spaced along the outer edge region of the opposing surface 122. Furthermore, the resin structure 123b is also arranged in droplet shape in 24 circular printing areas, which are equally spaced along the outer edge of a small region A2 opposite to the small display area 133b when the windshield member 12b is mounted on the watch 1b. Moreover, the number of printing areas in the outer edge region and the small region can be arbitrary.

[0067] In each resin structure 123b, the surface of the dial 13b side is covered by multiple amorphous protrusions. Each resin structure 123b is formed in a colorless and transparent manner from a UV-cured resin with light transmittance and primarily composed of acrylate. Each resin structure 123b can be formed from a UV-cured resin of any composition that becomes colorless and transparent after curing. Part or all of the resin structure 123b can also be formed in a colored and transparent manner. For example, the resin structure 123b provided only in a small area A2 can be formed in a colored and transparent manner.

[0068] The resin structure 123b is formed by attaching multiple droplets of translucent, ultraviolet-curable resin to a small area A2 of the opposing surface 122, and then irradiating the attached droplets with ultraviolet light within 0.5 seconds of attachment to harden the droplets. Thus, the windshield member 12b has the resin structure 123b surrounding the small display area 133b when viewed from the front, thereby creating a new aesthetic appearance around the small display area 133b, resembling a faceted, gem-like object.

[0069] In the above description, the resin structure 123b is disposed in the outer edge region and the small region, but this is not a limited example; the resin structure 123b may also be disposed only in the small region. Furthermore, the dial 13b has a small display area 133b, but may also have multiple small display areas 133b. In this case, the resin structure 123b may be disposed in each of the multiple small regions opposite to the multiple small display areas 133b, or may be disposed only in a portion of the small regions.

[0070] Please understand that those skilled in the art can make various changes, substitutions, and modifications without departing from the spirit and scope of this invention. The above embodiments and variations can also be implemented in combination as appropriate within the scope of this invention. Symbol Explanation

[0071] 1… Clock 11…Outer shell 12…Windshield components 121…Transparent panel 122… Opposite surfaces 123…Resin Structure 13…dial 141… Hour Hand 142… minute hand 143… second hand.

Claims

1. A method for manufacturing a windshield component, the windshield component being mounted on the front of the outer casing of a watch, the method for manufacturing the windshield component being characterized by comprising: A UV-curing inkjet printer ejects multiple droplets of translucent UV-curing resin, which then adhere to a printing area on a flat, transparent plate opposite the dial of the clock. Within 0.5 seconds of the droplet attachment, the attached droplet is irradiated with ultraviolet light in the 200nm-400nm wavelength range to harden it, thereby forming a translucent resin structure. The printed area is formed with a width of 0.2 mm or more and 3.0 mm or less in the short side direction. Further includes: Multiple second droplets of translucent, ultraviolet-curable resin are adhered to a second printing area on one side. After 0.5 seconds but within 5 seconds of the second droplet attaching, the attached second droplet is irradiated with ultraviolet light to harden it, thereby forming a light-transmitting second resin structure.

2. The method for manufacturing a windshield component according to claim 1, characterized in that, The printing area is located within the outer edge region along the outer edge of the surface.

3. The method for manufacturing a windshield component according to claim 1, characterized in that, The printing area is configured to surround the second printing area.

4. The method for manufacturing a windshield component according to claim 1, characterized in that, The printing area and the second printing area are overlapped. The second droplet is attached after the resin structure is formed.

5. The method for manufacturing a windshield component according to claim 1, characterized in that, The printing area and the second printing area are overlapped. The droplets adhere after the formation of the second resin structure.

6. A windshield component, characterized in that, Manufactured by the manufacturing method of any one of claims 1 to 5.

7. A clock, characterized in that, have: Exterior casing; The windshield component of claim 6 is disposed on the front side of the outer shell; The dial, which is built into the outer casing, is positioned opposite one side of the windshield component; and The pointer, located on the front of the dial, is driven to indicate the time.

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