ELECTROMAGNETIC AND CAPACITIVE POINTER

摘要

An electromagnetic and capacitive pointer is disclosed. The electromagnetic and capacitive pointer comprises a tube assembly and a conductive tube assembly, a ferrite core, an non-magnetic and conductive pin, a control circuit board, a conductive pin holder, a conductive elastomer, a holder and a power source. The non-magnetic and conductive pin, the conductive pin holder, the conductive elastomer, the control circuit board and the conductive tube assembly constitute a conductive path.

主权项

1. An electromagnetic and capacitive pointer, comprising:
a tube assembly and a conductive tube assembly; a ferrite core; an non-magnetic and conductive pin penetrating trough the ferrite core and being moveable through the ferrite core; a control circuit board; a conductive pin holder, one end of the non-magnetic and conductive pin being sheathed in the conductive pin holder; a conductive elastomer located between the conductive pin holder and the control circuit board; a holder with a winding coil electrically connecting to the control circuit board to constitute a resonance circuit with the ferrite core, the ferrite core, the conductive pin holder and the conductive elastomer being sheathed in the holder; and a power source providing the control circuit board with electrical power; wherein the non-magnetic and conductive pin, the conductive pin holder, the conductive elastomer, the control circuit board and the conductive tube assembly constitute a conductive path.