Patent ID: 9152250
Filing Date: 2015-10-06
Classification: G06F

Abstract:
1. An electromagnetic pointer with an adjustment structure, comprising: at least one pen tube assembly; a tuning component at one end of the pen tube assembly, the tuning component comprising a hollow screw configured to join with a thread inside the pen tube assembly so that the tuning component is able to be screwed into the pen tube assembly and move axially along the pen tube assembly to perform tuning; a pen tip in the pen tube assembly extending out from the tuning component; a core holder being configured in the pen tube assembly with a surrounding coil; a ferrite core being configured in the core holder and the pen tube assembly and contacting the pen tip; an elastomer and a touch pin being configured in the core holder and the pen tube assembly, the elastomer being located between the ferrite core and the touch pin, one end of the touch pin extending out from the core holder; and a circuit board, a first end of the circuit board comprising a plurality of conductive terminals adjacent the touch pin, an elastic conductive device comprising a cone spring formed in a conical shape and being located between the conductive terminals and the touch pin, a periphery of a base of the cone spring being in electrical contact with a peripheral one of the conductive terminals, and the surrounding coil connecting to the circuit board; wherein when the touch pin moves axially inside the core holder and the pen tube assembly between an extended position and a retracted position, the center of the cone spring correspondingly moves between a first position, at which it is not in electrical contact with a central one of the conductive terminals of the circuit board, and a second position, at which it is pushed by the touch pin to come in electrical contact with said central one of the conductive terminals, to thereby alter an electrical contact status between the peripheral one and the central one of the conductive terminals.