Timepiece face and timepiece

A clock and dial technology, which is applied to the clock face and the field of clocks, can solve the problems of the beautiful appearance of the clock face (decreased design, mixed air bubbles, etc., and achieves the effect of good bonding strength and preventing the generation of air bubbles).

Inactive Publication Date: 2012-09-19
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] When a conventional adhesive is used for a watch dial formed by joining multiple substrates (plate-shaped parts), air bubbles will be mixed in the adhesive layer (bonding layer) between the substrates, resulting in the deterioration of the entire watch dial. The beautiful appearance (design) is significantly reduced

Method used

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  • Timepiece face and timepiece
  • Timepiece face and timepiece
  • Timepiece face and timepiece

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0034] figure 1 It is a sectional view showing the first embodiment of the timepiece dial of the present invention. In the description below, figure 1 (about the later figure 2 , image 3 The upper side in the same) is representatively described for the case of facing the viewer's side when the watch dial is used, and the upper side in the figure is referred to as "upper" or "upper", and the lower side is referred to as "upper". Down" or "Below".

[0035] As shown in the figure, the timepiece dial 10 includes a first substrate 1A and a second substrate 1B as a plurality of substrates 1 mainly made of polycarbonate, and a bonding layer 2 for bonding the first substrate 1A and the second substrate 1B. In addition, the bonding layer 2 is composed of an adhesive elastomer composition having a thickness of 50 μm to 200 μm, an elongation of 50% to 350%, and a light transmittance of 80% or more in the thickness direction. It is obtained by irradiating ultraviolet rays to crossl...

no. 2 Embodiment approach

[0074] figure 2 It is a sectional view showing the second embodiment of the timepiece dial of the present invention. Hereinafter, the timepiece dial of the second embodiment will be described focusing on differences from the above-described embodiment, and descriptions of the same contents will be omitted.

[0075] The timepiece dial 10 of this embodiment has a first substrate 1A mainly composed of polycarbonate, a first bonding layer 2A, a second substrate 1B mainly composed of polycarbonate, a second bonding layer 2B, and a substrate mainly composed of polycarbonate are laminated in this order. The structure of the third substrate 1C made of carbonate. That is, the timepiece dial 10 of the present embodiment has a first substrate 1A, a second substrate 1B, and a third substrate 1C as the substrate 1, a first bonding layer 2A for bonding the first substrate 1A and the second substrate 1B, and a bonding layer for bonding the second substrate 1A. The second bonding layer 2B ...

Embodiment 1

[0140] First, polycarbonate is used to produce a disc-shaped base material by injection molding, and then the desired position is punched out, and unnecessary flashes are cut and ground to obtain multiple substrates.

[0141] The thus-obtained substrate had a diameter of 27 mm x an average thickness of 200 μm, and had a hole for inserting the axis of the hands (hour hand, minute hand, and second hand) at the center in a planar view. The substrate thus obtained was used as a first substrate. In addition, by performing punching processing on the above-mentioned substrate (first substrate), in addition to forming a hole for inserting the axis of the hands (hour hand, minute hand, and second hand) in the central part in plan view, other parts are also Holes are formed to obtain a second substrate.

[0142] On the other hand, the laminate obtained in Preparation Example 1 above was punched into the same shape as the second substrate.

[0143] One film was peeled off from the punc...

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PUM

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Abstract

The application concerns a timepiece face and a timepiece. The timepiece face is created by bonding a plurality of substrates configured primarily from polycarbonate, is excellent in bonding strength and prevents the forming generation in the bond layer effectively. The timepiece face used in the timepiece includes a first substrate configured primarily from polycarbonate, a second substrate configured primarily from polycarbonate and a bond layer for bonding the first substrate and the second substrate. The bond layer is configured from an adhesive elastic body composition obtained by directing UV light on a UV-crosslinking acrylic resin material in an oxygen-blocked state so that crosslinking occurs, the UV-crosslinking acrylic resin material having as a main agent an acrylic acid monomer and/or oligomer; and the bond layer has a thickness of 50 [mu]m to 200 [mu]m, an elongation of 50% to 350%, and a light transmittance of 80% or higher in the thickness direction.

Description

technical field [0001] The present invention relates to a timepiece dial and a timepiece. Background technique [0002] Clocks and clock faces require functions as practical items and decorative properties (beautiful appearance) as accessories. [0003] Furthermore, as a timepiece dial, a dial in which a plurality of substrates (plate-like members) are bonded is known (for example, refer to Patent Document 1). [0004] In the manufacture of such timepiece dials, the bonding of the aforementioned plurality of substrates has been performed using an adhesive made of synthetic resin. [0005] On the other hand, timepiece dials made of highly transparent polycarbonate are also used for the purpose of improving the decorativeness or improving the translucency when applied to timepieces with solar cells (solar timepieces). [0006] When a conventional adhesive is used for a watch dial formed by joining multiple substrates (plate-shaped parts), air bubbles will be mixed in the adh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B19/12
CPCG04B19/12G04B19/06
Inventor 高泽幸树
Owner SEIKO EPSON CORP
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