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公开(公告)号：EP2563603B1
公开(公告)日：2014-11-19
申请号：EP11775412.7
申请日：2011-03-08
CPC分类号： B43K7/005 , B43K8/003 , B43K23/00 , B43K24/02 , B43K25/026
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公开(公告)号：EP2563603A1
公开(公告)日：2013-03-06
申请号：EP11775412.7
申请日：2011-03-08
IPC分类号： B43K24/02
CPC分类号： B43K7/005 , B43K8/003 , B43K23/00 , B43K24/02 , B43K25/026
摘要： An expandable writing instrument has a writing end body section and a rear body section mounted to the writing end body section for relative axial and non-rotational movement between an extended position with the rear body section spaced away from the writing end body section, and a retracted position with the rear body section closer to the writing end body section. A spring in the writing end body section biases the cartridge upwardly. A helix cylinder is mounted for rotation and axial movement in the rear body section with a peg of the rear body section sliding in a track of the helix cylinder. The track is a closed loop with left and right hand helixes so that axial movement of the rear body section causes rotation of the helix cylinder continuously in one rotational direction. A shuttle receives a cartridge body and is mounted for axial movement in the helix cylinder. A shuttle cam on the shuttle is mounted for axial non- rotational movement to the writing end body section. Shuttle cam surfaces slidably engage cam surfaces of the helix cylinder and the cam surfaces include a high point that engages a flat portion of another cam surface for moving the shuttle with rotation of the helix cylinder, to project a writing tip of a cartridge out of the bottom opening in the extended position.
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