Patent ID: 9269488
Filing Date: 2016-02-23
CPC Classification: G01B,G06F,H01F

Claim Text:
1. An electronic ink cartridge of an electromagnetic induction type, the electronic ink cartridge being structured to be replaceably inserted in a pen-shaped position pointer that electromagnetically indicates a position on a sensor surface, the electronic ink cartridge comprising: a tubular member structured to be replaceably inserted in a cylindrical housing of the pen-shaped position pointer, a core member partially housed in the tubular member and extended out from a distal end of the tubular member, a resonance circuit housed inside the tubular member, the resonance circuit having a coil, whose inductance varies in response to pressure applied to the core member, and a capacitor circuit, which has predetermined capacitance and which is connected in parallel to the coil, the electronic ink cartridge being configured to detect the pressure applied to the core member based on a variation of a resonance frequency of the resonance circuit, and the coil being positioned between the core member and the capacitor circuit along a direction of a center axis of the tubular member, a connection member accommodated in the tubular member between the coil and the capacitor circuit, the connection member having a generally cylindrical shape including two axial end surfaces and a peripheral side surface defined between the two axial end surfaces, and two connection terminals that electrically connect a first end and a second end of the coil to a first terminal and a second terminal of the capacitor circuit, respectively, wherein the peripheral side surface of the connection member defines at least one recessed portion, at which the first end and the second end of the coil are electrically connected with the two connection terminals, respectively.