Retractable pen
First Claim
1. A retractable pen, comprising:
- a body including a barrel and an ink cartridge received in the barrel;
the barrel having a lower end forming a lead-out opening, and the ink cartridge having a tip formed at a lower end thereof; and
a switching device mounted between the barrel and the ink cartridge for causing the tip to move between an extended position, in which the tip is projected from the lead-out opening of the barrel, and a retracted position, in which the tip is located in the barrel;
the lead-out opening of the barrel having an inner diameter smaller than an outer diameter of the tip, such that the tip moved to the extended position is pressed against and immovably held to the lead-out opening; and
the switching device including;
a limiting member fitted in the barrel and formed with a plurality of first stop points for limiting the tip to the retracted position continuously and a plurality of second stop points for limiting the tip to the extended position continuously; and
a shifting path being defined between any two adjacent first and second stop points;
a shifting member mounted in the limiting member and movable from one first stop point to an adjacent second stop point or from one second stop point to an adjacent first stop point, such that the shifting member can be shifted along the shifting path between a first position farther away from an upper end of the ink cartridge and a second position closer to the upper end of the ink cartridge for pushing against the ink cartridge;
a deformable member mounted between the shifting member and the ink cartridge;
wherein when the tip is located at the extended position and the shifting member is located at a third position within the shifting path before being moved to the second position, the deformable member can be compressed and deformed by between the shifting member and the ink cartridge, allowing the shifting member to be further moved from the third position to the second position; and
a resetting member for elastically bringing the tip from the extended position to the retracted position.
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Accused Products
Abstract
A retractable pen includes a barrel, an ink cartridge, a limiting member, a shifting member and a deformable member. When the shifting member is moved relative to the limiting member between a first position and a third position, the ink cartridge can be moved from a retracted position to an extended position or from the extended position to the retracted position. When the ink cartridge is located at the extended position, the deformable member can be further compressed by between the shifting member and the ink cartridge, allowing the shifting member to be moved further from the third position to a second position closer to the ink cartridge. When the shifting member is located at the second position, the ink cartridge is continuously held to the extended position and pressed against a lead-out opening of the barrel without the risk of swaying when a user writes with the retractable pen.
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Citations
15 Claims
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1. A retractable pen, comprising:
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a body including a barrel and an ink cartridge received in the barrel;
the barrel having a lower end forming a lead-out opening, and the ink cartridge having a tip formed at a lower end thereof; anda switching device mounted between the barrel and the ink cartridge for causing the tip to move between an extended position, in which the tip is projected from the lead-out opening of the barrel, and a retracted position, in which the tip is located in the barrel; the lead-out opening of the barrel having an inner diameter smaller than an outer diameter of the tip, such that the tip moved to the extended position is pressed against and immovably held to the lead-out opening; and the switching device including; a limiting member fitted in the barrel and formed with a plurality of first stop points for limiting the tip to the retracted position continuously and a plurality of second stop points for limiting the tip to the extended position continuously; and
a shifting path being defined between any two adjacent first and second stop points;a shifting member mounted in the limiting member and movable from one first stop point to an adjacent second stop point or from one second stop point to an adjacent first stop point, such that the shifting member can be shifted along the shifting path between a first position farther away from an upper end of the ink cartridge and a second position closer to the upper end of the ink cartridge for pushing against the ink cartridge; a deformable member mounted between the shifting member and the ink cartridge;
wherein when the tip is located at the extended position and the shifting member is located at a third position within the shifting path before being moved to the second position, the deformable member can be compressed and deformed by between the shifting member and the ink cartridge, allowing the shifting member to be further moved from the third position to the second position; anda resetting member for elastically bringing the tip from the extended position to the retracted position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification