Title:
KEY SHEET, LIGHT GUIDE SHEET HAVING LIGHT-BLOCKING EFFECT, PUSH-BUTTON SWITCH, AND METHOD FOR MANUFACTURING KEY SHEET
Document Type and Number:
WIPO Patent Application WO/2010/070956
Kind Code:
A1
Abstract:
Provided is a configuration in which light is efficiently guided in a key sheet and the light is prevented from leaking from around key tops. A key sheet (1) is configured by providing a dark colored printing layer (24) having light-blocking effect and produced from a hardened body of a coating fluid that does not erode a base sheet (3) on the rear surface (3b) of the base sheet (3), and by forming a smooth surface (11) between the base sheet (3) and the dark colored printing layer (24). Consequently, a tendency for light conducted in the base sheet (3) to enter the dark colored printing layer (24) can be reduced, the light can be efficiently guided in the base sheet (3), and light to be transmitted through the base sheet (3) can be blocked.
Inventors:
TAKEDA Yasunori (10-5, Tabata 5-chome, Kita-k, Tokyo 14, 〒1140014, JP)
武田 泰範 (〒14 東京都北区田端５－１０－５ ポリマテック株式会社Ｒ＆Ｄセンター内 Tokyo, 〒1140014, JP)
武田 泰範 (〒14 東京都北区田端５－１０－５ ポリマテック株式会社Ｒ＆Ｄセンター内 Tokyo, 〒1140014, JP)
Application Number:
JP2009/066109
Publication Date:
June 24, 2010
Filing Date:
September 15, 2009
Export Citation:
Assignee:
Polymatech Co., Ltd. (8-16, Nihonbashihoncho 4-chome Chuo-k, Tokyo 24, 〒1038424, JP)
ポリマテック株式会社 (〒24 東京都中央区日本橋本町４丁目８－１６ Tokyo, 〒1038424, JP)
TAKEDA Yasunori (10-5, Tabata 5-chome, Kita-k, Tokyo 14, 〒1140014, JP)
ポリマテック株式会社 (〒24 東京都中央区日本橋本町４丁目８－１６ Tokyo, 〒1038424, JP)
TAKEDA Yasunori (10-5, Tabata 5-chome, Kita-k, Tokyo 14, 〒1140014, JP)
International Classes:
H01H13/14; H01H11/00; H01H13/02; H01H13/702
Attorney, Agent or Firm:
OHTAKE Seigo et al. (Dai 4 Matsuzaka Bldg, 33-5 Higashiazabu 2-chom, Minato-ku Tokyo 44, 〒1060044, JP)
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