CA2499834A1 - Auto-retractable pen with ferromagnetic attachment - Google Patents

Auto-retractable pen with ferromagnetic attachment Download PDF

Info

Publication number
CA2499834A1
CA2499834A1 CA 2499834 CA2499834A CA2499834A1 CA 2499834 A1 CA2499834 A1 CA 2499834A1 CA 2499834 CA2499834 CA 2499834 CA 2499834 A CA2499834 A CA 2499834A CA 2499834 A1 CA2499834 A1 CA 2499834A1
Authority
CA
Canada
Prior art keywords
pen
cap
ink cartridge
permanent magnet
auto
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2499834
Other languages
French (fr)
Other versions
CA2499834C (en
Inventor
Go Simon Sunatori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CA 2499834 priority Critical patent/CA2499834C/en
Publication of CA2499834A1 publication Critical patent/CA2499834A1/en
Application granted granted Critical
Publication of CA2499834C publication Critical patent/CA2499834C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/001Supporting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K25/00Attaching writing implements to wearing apparel or objects involving constructional changes of the implements

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

An auto-retractable pen comprises a pen and a cap. The pen comprises a hollow case, an ink cartridge, a mechanical spring and a mobile magnetic element. The cap comprises a cap body and a stationary permanent magnet. The pen or the cap comprises a ferromagnetic element. The pen is capable of attaching to the cap by the magnetic attraction force in a single-hand operation when a user places the mobile magnetic element of the pen in proximity to the stationary permanent magnet of the cap. The writing tip of the pen retracts into the hollow case of the pen when an upward magnetic attraction force becomes greater than a downward mechanical expansion force. The ferromagnetic element provides an increase in strength of the magnetic attachment force by concentrating magnetic flux lines. This invention relates to retractable pens, and the principal use of the invention is for operating a pen with a single hand.

Claims (13)

1. An auto-retractable pen comprising:
a pen comprising:
a hollow case having a closed end, a narrow middle portion and an open conical end;
an ink cartridge having a top end, a fat portion and a writing tip, the ink cartridge slidably mounted inside the hollow case, the writing tip of the ink cartridge being capable of penetrating through the open conical end of the hollow case;
a mechanical spring for downwardly biasing the ink cartridge, the mechanical spring concentrically mounted around the ink cartridge between the narrow middle portion of the hollow case and the fat portion of the ink cartridge;
a ferromagnetic element having a top end and portions defining a central hole, the ferromagnetic element securely attached to the top end of the ink cartridge; and a mobile magnetic element magnetically attached to the top end of the ferromagnetic element, the mobile magnetic element detachable from the ferromagnetic element; and a cap comprising:
a cap body having a top end and a bottom end; and a stationary permanent magnet for providing a magnetic attraction force, the stationary permanent magnet securely attached to the bottom end of the cap body;
the pen being capable of attaching to the cap by the magnetic attraction force in a single-hand operation when a user places the mobile magnetic element of the pen in proximity to the stationary permanent magnet of the cap, the writing tip of the ink cartridge of the pen retracting into the hollow case of the pen when an upward magnetic attraction force between the mobile magnetic element of the pen and the stationary permanent magnet of the cap becomes greater than a downward mechanical expansion force by the mechanical spring of the pen, the downward mechanical expansion force by the mechanical spring of the pen providing a cushion effect to the writing tip of the ink cartridge of the pen, the ferromagnetic element providing an increase in strength of the magnetic attachment force between the pen and the cap by concentrating magnetic flux lines between the mobile magnetic element and the stationary permanent magnet.
2. An auto-retractable pen comprising:
a pen comprising:
a hollow case having a closed end, a narrow middle portion and an open conical end;
an ink cartridge having a top end, a fat portion and a writing tip, the ink cartridge slidably mounted inside the hollow case, the writing tip of the ink cartridge being capable of penetrating through the open conical end of the hollow case;
a mechanical spring for downwardly biasing the ink cartridge, the mechanical spring concentrically mounted around the ink cartridge between the narrow middle portion of the hollow case and the fat portion of the ink cartridge; and a mobile magnetic element securely attached to the top end of the ink cartridge; and a cap comprising:
a cap body having a top end and a bottom end;
a ferromagnetic element having a bottom end, the ferromagnetic element securely attached to the bottom end of the cap body; and a stationary permanent magnet for providing a magnetic attraction force, the stationary permanent magnet magnetically attached to the bottom end of the ferromagnetic element, the stationary permanent magnet detachable from the ferromagnetic element;
the pen being capable of attaching to the cap by the magnetic attraction force in a single-hand operation when a user places the mobile magnetic element of the pen in proximity to the stationary permanent magnet of the cap, the writing tip of the ink cartridge of the pen retracting into the hollow case of the pen when an upward magnetic attraction force between the mobile magnetic element of the pen and the stationary permanent magnet of the cap becomes greater than a downward mechanical expansion force by the mechanical spring of the pen, the downward mechanical expansion force by the mechanical spring of the pen providing a cushion effect to the writing tip of the ink cartridge of the pen, the ferromagnetic element providing an increase in strength of the magnetic attachment force between the pen and the cap by concentrating magnetic flux lines between the mobile magnetic element and the stationary permanent magnet.
3. The auto-retractable pen as defined in claim 1 or claim 2, further comprising:
a loop-shaped cord securely attached to the top end of the cap body of the cap.
4. The auto-retractable pen as defined in claim 1 or claim 2, in which the hollow case of the pen is cylindrical.
5. The auto-retractable pen as defined in claim 1 or claim 2, in which the mobile magnetic element of the pen is disc-shaped.
6. The auto-retractable pen as defined in claim 1 or claim 2, in which the mobile magnetic element of the pen is ring-shaped.
7. The auto-retractable pen as defined in claim 1 or claim 2, in which the mobile magnetic element of the pen is made of a rare-earth permanent magnet.
8. The auto-retractable pen as defined in claim 1 or claim 2, in which the cap body of the cap is cylindrical.
9. The auto-retractable pen as defined in claim 1 or claim 2, in which the stationary permanent magnet of the cap is disc-shaped.
10. The auto-retractable pen as defined in claim 1 or claim 2, in which the stationary permanent magnet of the cap is ring-shaped.
11. The auto-retractable pen as defined in claim 1 or claim 2, in which the stationary permanent magnet of the cap is made of a rare-earth permanent magnet.
12. The auto-retractable pen as defined in claim 1 or claim 2, in which the ink cartridge of the pen is a ball-point pen.
13. The auto-retractable pen as defined in claim 1 or claim 2, in which the ink cartridge of the pen is a gel-ink pen.
CA 2499834 2005-03-18 2005-03-18 Auto-retractable pen with ferromagnetic attachment Expired - Fee Related CA2499834C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2499834 CA2499834C (en) 2005-03-18 2005-03-18 Auto-retractable pen with ferromagnetic attachment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2499834 CA2499834C (en) 2005-03-18 2005-03-18 Auto-retractable pen with ferromagnetic attachment

Publications (2)

Publication Number Publication Date
CA2499834A1 true CA2499834A1 (en) 2006-09-18
CA2499834C CA2499834C (en) 2011-09-20

Family

ID=37054247

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2499834 Expired - Fee Related CA2499834C (en) 2005-03-18 2005-03-18 Auto-retractable pen with ferromagnetic attachment

Country Status (1)

Country Link
CA (1) CA2499834C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010092388A1 (en) * 2009-02-13 2010-08-19 Richard Colin Thomas Allan Writing instrument
WO2010133800A1 (en) * 2009-05-19 2010-11-25 SOCIéTé BIC Writing implement with magnetic repulsion
CN108602376A (en) * 2016-01-08 2018-09-28 斯克里贝技术咨询有限责任公司 Writing implement with magnetic characteristic portion and quick filling ability
WO2020074025A1 (en) * 2018-10-12 2020-04-16 Klaska Michal Fountain pen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010092388A1 (en) * 2009-02-13 2010-08-19 Richard Colin Thomas Allan Writing instrument
WO2010133800A1 (en) * 2009-05-19 2010-11-25 SOCIéTé BIC Writing implement with magnetic repulsion
FR2945766A1 (en) * 2009-05-19 2010-11-26 Bic Soc MAGNETIC REPULSION WRITING INSTRUMENT
CN102458874A (en) * 2009-05-19 2012-05-16 毕克有限公司 Writing implement with magnetic repulsion
CN102458874B (en) * 2009-05-19 2015-07-01 毕克有限公司 Writing implement with magnetic repulsion
CN108602376A (en) * 2016-01-08 2018-09-28 斯克里贝技术咨询有限责任公司 Writing implement with magnetic characteristic portion and quick filling ability
US10532601B2 (en) 2016-01-08 2020-01-14 Scribe Technical Consulting Llc Writing instrument with magnetic features and quick refill capability
EP3400139A4 (en) * 2016-01-08 2020-02-19 Scribe Technical Consulting LLC Writing instrument with magnetic features and quick refill capability
CN108602376B (en) * 2016-01-08 2020-08-28 斯克里贝技术咨询有限责任公司 Writing instrument with magnetic feature and quick fill capability
WO2020074025A1 (en) * 2018-10-12 2020-04-16 Klaska Michal Fountain pen

Also Published As

Publication number Publication date
CA2499834C (en) 2011-09-20

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EEER Examination request
MKLA Lapsed

Effective date: 20140318