BUTTON FOR INPUT INTERFACE, INPUT INTERFACE AND PORTABLE TERMINAL
The present invention provides a button for an input interface, and an input interface and a portable terminal thereof, which make visibility of an indicated character high, and make it easy to detect a boundary with the tactile sensation. A button, which is used for an input interface of a portable terminal and which is stuck fixedly to a base sheet adjacently to at least one other button, is characterized in that a thin wall part, which is positioned lower than a key top part, is formed on at least one peripheral side adjacent to the other button and in that a character, which is printed on the base sheet or a surface stuck fixedly to the base sheet, is made visible by penetrating through the key top part and the thin wall part.
1 . A button which is used for an input interface of a portable terminal and which is stuck fixedly to a base sheet adjacently to at least one other button, characterized in that:
a thin wall part of the button, which is positioned lower than a key top part of the button, is formed on at least one peripheral side adjacent to the other button; and
a character, which is printed on the base sheet or a surface stuck fixedly to the base sheet, is made visible by penetrating through the key top part and the thin wall part.
2 . The button for the input interface according to claim 1 , characterized in that:
an angle of the key top part to the thin wall part is almost right.
3 . The button for the input interface according to claim 1 characterized in that:
the thin wall part is formed in a state of enclosing the key top part.
4 . An input interface which is equipped with the button for the input interface according to claim 1 .
5 . The input interface which is equipped with the button for the input interface according to claim 1 characterized in that:
the thin wall part is formed on each button for the input interface at an area, through which two buttons are adjacent each other, in a state that the thin wall part is formed on only one button for the input interface out of two buttons.
6 . The input interface of the portable terminal according to claim 4 , characterized in that:
the buttons for the input interface are arranged in a matrix form in a vertical direction and in a horizontal direction.
7 . A portable terminal which is equipped with the input interface of the portable terminal according to claim 4 .