Auto-retractable pen with ferromagnetic attachment

B - Operations – Transporting – 43 – K

Patent

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Details

B43K 24/02 (2006.01) B43K 23/12 (2006.01)

Patent

CA 2499834

An auto-retractable pen comprises a pen and a cap. The pen comprises a hollow case, an ink cartridge, a mechanical spring and a mobile magnetic element. The cap comprises a cap body and a stationary permanent magnet. The pen or the cap comprises a ferromagnetic element. The pen is capable of attaching to the cap by the magnetic attraction force in a single-hand operation when a user places the mobile magnetic element of the pen in proximity to the stationary permanent magnet of the cap. The writing tip of the pen retracts into the hollow case of the pen when an upward magnetic attraction force becomes greater than a downward mechanical expansion force. The ferromagnetic element provides an increase in strength of the magnetic attachment force by concentrating magnetic flux lines. This invention relates to retractable pens, and the principal use of the invention is for operating a pen with a single hand.

Stylo autorétractable comprenant un stylo et un capuchon. Le stylo comporte une enveloppe creuse, une cartouche d'encre, un ressort mécanique et un élément magnétique mobile. Le capuchon comprend un corps de capuchon et un aimant permanent stationnaire. Le stylo ou le capuchon comporte un élément ferromagnétique. Le stylo peut être fixé au capuchon par la force d'attraction magnétique au cours d'une opération d'une seule main où un utilisateur place l'élément ferromagnétique mobile de stylo à proximité de l'aimant permanent stationnaire du capuchon. La pointe d'écriture du stylo se rétracte dans l'enveloppe creuse du stylo lorsqu'une force magnétique vers le haut devient plus grande qu'une force d'expansion mécanique vers le bas. L'élément ferromagnétique crée une augmentation de la force d'attraction magnétique en concentrant des lignes de flux magnétique. La présente invention concerne les stylos rétractables, et l'invention sert surtout à l'utilisation du stylo d'une seule main.

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