Patent ID: 6140908
Filing Date: 2000-10-31
Classification: H01C

Abstract:
An FBT focus unit, comprising:a volume board;a resistor pattern having at least one round portion and formed on said volume board, with a variable contact point moving along said round portion around a central point of said round portion;an opening formed within said round resistor portion; said opening covering a central contact point of a volume slider, i.e., a center of a virtual circle extending along said round portion of said resistor pattern, and covering a portion of a virtual straight line connecting a starting point and an ending point of said round portion of said resistor pattern;a volume case having at least one volume board coupling space in which said volume board is received; said volume case having an isolating wall inserted into said opening of said volume board so as to protrude above said volume board; anda cover coupled with said volume case.