Fixed-nib writing instrument with a protective retractible...

B - Operations – Transporting – 43 – K

Patent

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Details

B43K 24/04 (2006.01) B43K 24/06 (2006.01)

Patent

CA 2665520

The invention relates to a fixed-nib writing instrument (6) having a shaft (1), to the front of which a protective sleeve (2) is movably fitted coaxially relative to the shaft (1), the movement of said sleeve taking place between a protective position in which it covers the writing nib and a retracted position in which it permits writing. The sleeve (2) comprises a wall portion (2A) having at least one helical guide path (20, 21) that engages with at least one stud (10, 11) connected to the shaft (1). Means of retention of the rotation of the sleeve (2) are provided to prevent the sleeve rotating at less than a certain threshold effort in the two positions of protection and retraction, and comprise at least one lengthwise rib (26, 27) suitable for engaging elastically in a first groove (16, 17) and in a second groove (16', 17') for the protective and retracted positions, respectively.

L'invention concerne un instrument d'écriture à pointe fixe (6), présentant un fut (1) à l'avant duquel un manchon (2) de protection est monté mobile de façon coaxiale par rapport au fût (1), le déplacement dudit manchon s'effectuant entre une position de protection pour laquelle il recouvre la pointe d'écriture et une position rétractée pour laquelle il permet l'écriture. Le manchon (2) comprend une portion de paroi (2A) qui comporte au moins un chemin de guidage hélicoïdal (20, 21) coopérant avec au moins un ergot (10, 11) relié au fût (1). Des moyens de retenue de la rotation du manchon (2) sont prévus pour empêcher la rotation du manchon en dessous d'un certain seuil d'effort dans les deux positions respectivement de protection et rétractée, et comprennent au moins une nervure (26, 27) longitudinale adaptée pour s'engager élastiquement dans une première gorge (16, 17) et dans une seconde gorge (16', 17') respectivement dans la position de protection et dans la position rétractée.

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