Retractable writing material
First Claim
1. A retractable-nib writing tool having a retractable writing body slidable in forward and backward directions in a shaft tube and having a sealing lid and a sealing tube which seal a writing nib of the writing body in association with the forward and backward movements of the writing body, wherein:
- the sealing lid is independent of and not mounted to the sealing tube, the sealing lid and a guide tube fixed to the writing body are linked by a plurality of thin line portions, the thin line portions are disposed at equal intervals around the sealing lid and constitute therewith a unitary structure, and the sealing lid is opened and closed relative to the sealing tube by the forward and backward movements of the thin line portions; and
wherein at least one thin line portion out of the plurality of thin line portions which are advanced by the forward motion of the guide tube is regulated and other thin line portions can be flexibly bent and deformed.
1 Assignment
0 Petitions
Accused Products
Abstract
This is a retractable-nib writing tool having a retractable writing body in a shaft tube and having a sealing lid and a sealing tube which seal the writing nib of the writing body in association with the forward and backward movements of the writing body. In this retractable-nib writing tool, the sealing lid and a guide tube fixed to the writing body are linked by a plurality of thin line portions, the sealing lid and thin line portions are formed integrally, and the sealing lid is opened and closed relative to the sealing tube by the forward and backward movements of those thin line portions. This retractable-nib writing tool can securely seal, when the writing body is retracted, the writing nib at the tip by the sealing lid and the sealing tube and thereby prevent the writing body from drying.
23 Citations
20 Claims
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1. A retractable-nib writing tool having a retractable writing body slidable in forward and backward directions in a shaft tube and having a sealing lid and a sealing tube which seal a writing nib of the writing body in association with the forward and backward movements of the writing body, wherein:
- the sealing lid is independent of and not mounted to the sealing tube, the sealing lid and a guide tube fixed to the writing body are linked by a plurality of thin line portions, the thin line portions are disposed at equal intervals around the sealing lid and constitute therewith a unitary structure, and the sealing lid is opened and closed relative to the sealing tube by the forward and backward movements of the thin line portions; and
wherein at least one thin line portion out of the plurality of thin line portions which are advanced by the forward motion of the guide tube is regulated and other thin line portions can be flexibly bent and deformed. - View Dependent Claims (2, 3)
- the sealing lid is independent of and not mounted to the sealing tube, the sealing lid and a guide tube fixed to the writing body are linked by a plurality of thin line portions, the thin line portions are disposed at equal intervals around the sealing lid and constitute therewith a unitary structure, and the sealing lid is opened and closed relative to the sealing tube by the forward and backward movements of the thin line portions; and
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4. A retractable-nib writing tool having a retractable writing body in a shaft tube and having a sealing lid and a sealing tube which seal the writing nib of the writing body in association with the forward and backward movements of the writing body, wherein:
- the sealing tube is fixed within the shaft tube, the sealing lid and a guide tube are arranged respectively ahead of and behind the sealing tube to fix the guide tube to the writing body and the guide tube and the sealing lid are linked with a plurality of flexible thin line portions, so configured that, while an opening at the forward end of the sealing tube is closed as the plurality of thin line portions keep the sealing lid in a state of being pressed against the sealing tube when the writing body is in a retracted position, the sealing lid turns to open the opening at the forward end of the sealing tube as the forward movement of any of the plurality of thin line portions relative to the sealing tube is restricted and those of the rest of the thin line portions are permitted when the writing body is to move forward.
- View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. A writing tool comprising:
a tubular member having an open front end;
a writing body axially slidable in the tubular member between a forward position in which a writing nib of the writing body extends through the open front end of the tubular member and a rearward position in which the writing nib is retracted into the tubular member;
a sealing tube disposed in the tubular member at a front portion thereof and having a front end through which the writing nib passes as the writing body moves forward in the tubular member to its forward position and behind which the writing nib retracts when the writing body is in its rearward position;
a sealing lid disposed forwardly of the front end of the sealing tube and being movable to open and close the front end of the sealing tube;
a guide tube slidably disposed in the tubular member to undergo axial sliding movement with the writing body and through which extends a portion of the writing body;
a spring disposed in the tubular member and interposed between the sealing tube and the guide tube to resiliently urge the guide tube and the writing body rearwardly to normally position the writing body in its rearward position; and
a plurality of flexible elongate members each connected at a front end thereof to the sealing lid, one or more of the flexible elongate members being connected to the guide tube so that when the guide tube moves rearwardly the one or more flexible elongate members pull the sealing lid to close the front end of the sealing tube and when the guide tube moves forwardly the one or more flexible members slacken to permit the sealing lid to open the front end of the sealing tube, and another of the flexible elongate members being slidable relative to the guide tube and enactable with the sealing tube during forward movement of the writing body to restrict forward movement of the another flexible elongate member so that further forward movement of the writing body causes the sealing lid to pivot about the region where the front end of the another flexible elongate member connects to the sealing lid to open the front end of the sealing tube.- View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
Specification