Position pointer of the electromagnetic induction type and electronic ink cartridge

摘要

A position pointer is disclosed, in which an electronic ink cartridge of an electromagnetic induction type is accommodated. The electronic ink cartridge includes a resonance circuit having a coil and a capacitor circuit, and is configured to detect pressure applied to a core member accommodated in the position pointer based on a variation of a resonance frequency of the resonance circuit. The cartridge includes a tubular member, in which the core member and the coil are accommodated such that the coil is positioned between the core member, which extends outwardly from one end of the tubular member, and the capacitor circuit along a direction of a center axis of the tubular member. The cartridge also includes a connection member in the tubular member, which electrically connects a first end and a second end of the coil to a first terminal and a second terminal of the capacitor circuit, respectively.

主权项

1. A coil module, configured to be included in a pen-shaped position pointer, the coil module comprising:
a magnetic core having a central axis and first and second axial ends, a coil wound around the magnetic core, the coil including a first end and a second end, a connection member having a central axis, first and second axial ends and a peripheral side surface defined between the first and second axial ends, the connection member being disposed such that its first axial end opposes and engages with the second axial end of the magnetic core and the central axis of the connection member is aligned with the central axis of the magnetic core, the peripheral side surface defining at least one recessed portion, and at least one terminal member made of conductive material and having a first end part and a second end part, the first end part extending in a direction perpendicular to the peripheral side surface at the at least one recessed portion, the first end part of the at least one terminal being electrically connected to the first or second end of the coil, and the second end part of the at least one terminal member being led out from the second axial end of the connection member.