US 6,981,812 B1 | ||
Opening and closing device for capless retractable marker pen | ||
Yung-Chieh Hsieh, Dali (Taiwan) | ||
Assigned to Flonto Corp., Taipei (Taiwan) | ||
Filed on Jul. 11, 2005, as Appl. No. 11/177,433. | ||
Claims priority of application No. 94105692 A (TW), filed on Feb. 24, 2005. | ||
Int. Cl. B43K 24/02 (2006.01); B43K 5/16 (2006.01) |
U.S. Cl. 401—108 | 13 Claims |
1. An opening and closing device for a capless retractable marker pen, wherein the opening and closing device is disposed
within a pen tube, and the opening and closing device comprises:
a supporting device having an upper opening and a lower opening, wherein a plurality of hooks are disposed around the lower
opening, and a protrusion is disposed in a substantially central portion of an outer surface of each hook;
a cover holder having an upper ring, a plurality of supports connected to the upper ring and a lower ring connected to the
supports, wherein the upper ring is coaxially disposed outside the supporting device and clipped between a rear end of each
hook and each protrusion;
a sealing member coaxially clipped within the lower ring and covering a writing tip disposed in the supporting device and
the cover holder, wherein the sealing member includes a cover plate and a cover supporting tube, and a side of the cover plate
is movably disposed on a side of the lower ring; and
a spring member coaxially disposed within the supporting device, wherein the spring member shores the supporting device and
the cover supporting tube by elastic force, so as to make the cover plate cover a lower surface of the cover supporting tube
to seal the writing tip,
wherein when the writing tip moves downward, the opening and closing device descends to an arc protrusion in the pen tube,
and the cover holder continuously rises across the protrusions of the supporting device to reach the outside of the upper
opening of the supporting device, wherein with the rise of the cover holder, the cover plate is opened to make the writing
tip project from the cover supporting tube.
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