摘要:
In a switch module which is arranged in opposition to a key substrate, the switch module is provided which is able to reduce an amount of light leaking out from the vicinity of an edge portion of a light reflection member in the direction of key parts, so that the key parts can be illuminated in a uniform manner by the light which advances in the interior of a light guiding member. A switch module (1) is provided with a circuit substrate (6) that has a metal dome sheet (4) mounted on a surface thereof which is arranged in opposition to a key substrate (8), a light guiding sheet (4) that is arranged between the key substrate (8) and the circuit substrate (6), an LED (2), and a reflector (9) that makes the light emitted from the LED (2) incident into the light guiding sheet (3) from an end thereof, wherein key parts (7) are able to be illuminated by the switch module 1. At an inner side of the reflector (9) in the light guiding sheet (3), there is formed a printed pattern (12) of white ink for scattering light on an optical path of the light which transmits through a first surface (3b) from the vicinity of an edge portion of the reflector (9).
摘要:
In a switch module which is arranged in opposition to a key substrate, the switch module is provided which is able to reduce an amount of light leaking out from the vicinity of an end of a light guiding member in the direction of key parts, so that the key parts can be illuminated in a uniform manner by the light which advances in the interior of the light guiding member. A switch module (1) is provided with a circuit substrate (6) that has a metal dome sheet (4) mounted on a surface thereof which is arranged in opposition to a key substrate (8), a light guiding sheet (4) that is arranged between the key substrate (8) and the circuit substrate (6), an LED (2), and a reflector (9) that makes the light emitted from the LED (2) incident into the light guiding sheet (3) from an end thereof, wherein key parts (7) are able to be illuminated by the switch module (1). The light guiding sheet (3) has a first surface (3b) that is arranged in opposition to the key substrate (8), and a second surface (3c) that is arranged at an opposite side of the first surface so as to be in opposition to the circuit substrate (6). In the vicinity of an end in the second surface (3c), there is formed a print pattern (12) by black ink on an optical path of the light which, after being reflected on the second surface (3c), transmits through the first surface (3b) in the vicinity of an end thereof, without being reflected on the first surface (3b).
摘要:
A fluoroalkylated allylurethane represented by the following general formula: RfROCONHR'NHCOOC n H 2n OCH 2 CH=CH 2 where Rf is a perfluoroalkyl group having 2 to 20 carbon atoms, R is a divalent organic group, R' is a diisocyanate residue, and n is an integer of 2 to 6, can undergo emulsion polymerization with at least one of a methacrylate ester, an acrylate ester and vinylidene chloride to give an effective aqueous copolymer emulsion for a water- and oil-repellent, anti-soiling processing agent.