EP0458326A1 - Automatic writing instrument - Google Patents

Automatic writing instrument Download PDF

Info

Publication number
EP0458326A1
EP0458326A1 EP91108340A EP91108340A EP0458326A1 EP 0458326 A1 EP0458326 A1 EP 0458326A1 EP 91108340 A EP91108340 A EP 91108340A EP 91108340 A EP91108340 A EP 91108340A EP 0458326 A1 EP0458326 A1 EP 0458326A1
Authority
EP
European Patent Office
Prior art keywords
clip slider
barrel
clip
slot
thrust
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.)
Withdrawn
Application number
EP91108340A
Other languages
German (de)
English (en)
French (fr)
Inventor
Tsutomu c/o Tokai Corp. Shike
Takayuki c/o Tokai Corp. Suzuki
Toshihiro c/o Tokai Corp. Ichikawa
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.)
Tokai Corp
Original Assignee
Tokai Corp
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 Tokai Corp filed Critical Tokai Corp
Publication of EP0458326A1 publication Critical patent/EP0458326A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
    • B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K25/00—Attaching writing implements to wearing apparel or objects involving constructional changes of the implements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K27/00—Multiple-point writing implements, e.g. multicolour; Combinations of writing implements
    • B43K27/08—Combinations of pens
    • B43K27/12—Combinations of pens of ball-point pens

Definitions

  • the present invention relates to an improvement in or relating to writing instruments such as ball-point pens, felt-tip pens, markers etc.
  • the present invention relates particularly to an automatic writing instrument which is designed so as to permit the switching from locking to unlocking position simply by depressing its clip, and drive its writing stick forward or backward simply by pushing and sliding its clip in forward or backward direction.
  • an automatic writing instrument requires a least number of parts to be assembled together.
  • Two-colored ball-point pens, felt-tip pens, or markers each having a thumb-thrust slidably fitted in a slot made in its hollow barrel are shown in Japanese Utility Models 57-11081(A) and 62-172091(A).
  • the hollow barrel contains two cartridges, which are fixed to the opposite sides of the thumb thrust, and are resiliently connected to and supported from the opposite ends of the barrel. Each end of the barrel has a small hole to permit the ball-point of each cartridge to appear in response to the forward or backward advance of the thumb-thrust.
  • Such automatic writing instrument requires the use of springs to resiliently hold its thumb-thrust and cartridges in its hollow barrel.
  • the use of extra springs increases the number of parts to be assembled, and hence complication in assembling, and accordingly manufacturing cost.
  • one object of the present invention is to provide an automatic writing instrument using no springs, thus reducing the number of parts to be assembled, making it easier to assemble automatic writing instruments, and accordingly reducing the manufacturing cost.
  • an automatic writing instrument comprises: a hollow barrel having a longitudinal slot and lateral sub-slots made therein; a clip slider slidably fitted in the longitudinal slot; and a writing stick connected to the clip slider so that forward and backward advance of the clip slider in the longitudinal slot may cause the writing stick to appear and disappear from either end of the barrel; the clip slider being so designed that it may be caught by a selected lateral slot in its stress-free, floating condition, thereby preventing the writing stick from sliding in the barrel, and so that it may be yieldingly depressed in the barrel, thereby releasing the clip slider from the selected lateral sub-slot to permit the writing stick to travel in the barrel.
  • the clip slider may comprise a thumb-thrust which is in the form of arch; a clip integrally connected to the rear end of the thumb-thrust; a guide piece integrally connected to the bottom of the thumb-thrust, and adapted to be slidably fitted in the longitudinal slot; and a lateral catch integrally connected to said guide piece to fit in a selected lateral sub-slot when the clip slider is put in its stress-free, floating condition.
  • the clip slider may comprise further thrust rods extending axially from the lateral catch in opposite directions.
  • the writing stick can be easily released from the locking position simply by depressing the clip slider down, thereby permitting the forward or backward sliding of the clip slider in the longitudinal slot to cause the writing stick to appear from either end of the barrel. This operation can be effected with a single hand.
  • the clip slider is retained normally in its locking position in which its lateral catch is caught by a selected lateral sub-slot, thereby preventing the sliding of the clip slider in the longitudinal slot of the hollow barrel.
  • the clip slider can be released from its locking position simply by depressing the thumb-thrust, thereby permitting the sliding of the clip slider in the longitudinal slot of the hollow barrel.
  • the clip slider will be put in normal, locking position when the thumb-thrust resiliently returns to its stress-free, original shape subsequent to the cease of depression of the thumb-thrust.
  • an automatic writing instrument according to the present invention is simple in structure, compared with the conventional automatic writing instruments, and accordingly assembling work is less complicated, and the manufacturing cost is lowered.
  • FIG. 1 shows a two-colored ball-point pen according to the present invention which comprises a hollow barrel 1 having round caps 2a threadedly engaged with its opposite ends, and two cartridges 4a and 4b having ball points 3a and 3b detachably fixed to one ends of these cartridges.
  • Each cap 2a has a small hole at its top, thereby permitting the ball point to appear from the barrel 1.
  • Each of longer and shorter cartridges 4a and 4b contain a different color ink.
  • the longer cartridge 4a contains ink of the color which is used much more frequently than that contained in the shorter cartridge 4b.
  • the hollow barrel 1 is made of a synthetic resin, and its opposite ends have threads (Fig. 15) to permit thread engagement of opposite caps 2a therewith. As best seen from Figs. 6 and 15, the barrel 1 has a longitudinal slot 11 and three lateral sub-slots 11b. These lateral sub-slots 11b are arranged at predetermined intervals.
  • the clip slider 5 can be fitted in the longitudinal slot 11a. The longitudinal slot length limits the sliding stroke of the clip slider 5.
  • a clip slider 5 comprises a thumb thrust 5a which is in the form of arch, a clip 5b integrally connected to the rear end of the thumb thrust 5a, a guide piece 5c integrally connected to the bottom of the thumb thrust 5a, and adapted to be slidably fitted in the longitudinal slot 11a, a lateral catch 5d integrally connected to the guide piece 5c to fit in a selected lateral sub-slot 11b when the clip slider 5 is put in its stress-free, floating condition, and thrust rods 5e integrally connected to the opposite sides of the lateral catch 5d and extending therefrom in opposite longitudinal directions.
  • the longer cartridge 4a is filled with an ink of the color which is supposed to be frequently used, and the shorter cartridge 4b is filled with another ink of the color which is supposed to be less frequently used so that the different inks in these cartridges may be used up simultaneously.
  • the automatic writing instrument is normally put in its locking position. Specifically, the opposite shoulders of the lateral catch 5d are caught by a selected lateral sub-slot 11b (Fig. 10) to prevent the sliding of the clip slider 5 in the longitudinal slot 11a.
  • the clip slider 5 can be released from its locking position simply by depressing the thumb-thrust 5a of the clip slider 5 until the shoulders of the lateral catch 5d are disengaged from the lateral sub-slot 11b (Fig. 11). In this unlatched position (Fig. 8) the clip slider 5 can be pushed forward or backward until the ball point 3a or 3b projects from either cap 2a or 2b.
  • the clip slider 5 When stopping depression of the thumb-thrust 5a, the clip slider 5 can return resiliently to its stress-free, original arch shape, thus allowing the shoulders of the lateral catch 5d to enter a selected lateral sub-slot 11b, and putting the clip slider 5 in its locking position, as seen from Fig. 9. In this position the automatic ball-point pen is ready to be used for writing.
  • the ball point 3a appears from the cap 2a with the clip slider 5 caught by the left sub-slot 11b (Fig. 12) whereas the ball point 3b appears from the cap 2b with the clip slider 5 caught by the right sub-slot 11b (Fig.14). Both ball points 3a and 3b are pulled in the hollow barrel 1 with the clip slider 5 caught by the center sub-slot 11b (Fig. 13).
  • an automatic writing instrument can be switched from its locking to unlocking position simply by pushing the clip slider 5, and a desired color ball point can be selectively used simply by pushing the clip slider forward or backward.
  • the operation can be effected with a single hand.
  • the use of longer and shorter cartridges 4a and 4b permits the inks of different colors to be used up simultaneously, thus avoiding the situation in which one cartridge is emptied while the other cartridge contains a remaining amount of ink, as would be the case with the use of two cartridges of equal length.
  • a swingable shield lid or flap may be attached to each cap of the barrel to open or close in response to the sliding of the clip slider.
  • a bundle of filaments having ink soaked therein may be used to fit the kind of a writing instrument.
  • the present invention can be equally applied to felt-tip pens, markers or any other writing instrument, and therefore the present invention should not be limited to a two color ball-point pen described herein and shown in the accompanying drawings.

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
EP91108340A 1990-05-24 1991-05-23 Automatic writing instrument Withdrawn EP0458326A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5360090U JPH0413390U (enrdf_load_stackoverflow) 1990-05-24 1990-05-24
JP53600/90 1990-05-24

Publications (1)

Publication Number Publication Date
EP0458326A1 true EP0458326A1 (en) 1991-11-27

Family

ID=12947374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108340A Withdrawn EP0458326A1 (en) 1990-05-24 1991-05-23 Automatic writing instrument

Country Status (2)

Country Link
EP (1) EP0458326A1 (enrdf_load_stackoverflow)
JP (1) JPH0413390U (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1221384A1 (de) * 2001-01-03 2002-07-10 C. Josef Lamy GmbH Schreibgerät
CN102821972A (zh) * 2010-03-23 2012-12-12 斑马株式会社 圆珠笔

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011056202A (ja) * 2009-09-15 2011-03-24 Chikuhodo:Kk スライド式両頭化粧筆
JP5584772B2 (ja) * 2010-09-30 2014-09-03 本田技研工業株式会社 車体前部構造
JP6559481B2 (ja) * 2015-06-29 2019-08-14 株式会社パイロットコーポレーション 筆記具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1428077A (en) * 1921-06-30 1922-09-05 Clark Harry Adam Pencil
US2259133A (en) * 1940-05-11 1941-10-14 Elmer E Harper Mechanical instrument holder device
US3025834A (en) * 1959-04-08 1962-03-20 American Stencil Mfg Co Double-end ball-point pen
JPS5711081U (enrdf_load_stackoverflow) * 1980-06-24 1982-01-20
GB2131355A (en) * 1982-12-08 1984-06-20 Gillette Co Marking instrument
US4717275A (en) * 1986-06-20 1988-01-05 Burkhardt Jr Dietmar Writing instrument with a retractable clip

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4836858U (enrdf_load_stackoverflow) * 1971-08-19 1973-05-04

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1428077A (en) * 1921-06-30 1922-09-05 Clark Harry Adam Pencil
US2259133A (en) * 1940-05-11 1941-10-14 Elmer E Harper Mechanical instrument holder device
US3025834A (en) * 1959-04-08 1962-03-20 American Stencil Mfg Co Double-end ball-point pen
JPS5711081U (enrdf_load_stackoverflow) * 1980-06-24 1982-01-20
GB2131355A (en) * 1982-12-08 1984-06-20 Gillette Co Marking instrument
US4717275A (en) * 1986-06-20 1988-01-05 Burkhardt Jr Dietmar Writing instrument with a retractable clip

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1221384A1 (de) * 2001-01-03 2002-07-10 C. Josef Lamy GmbH Schreibgerät
CN102821972A (zh) * 2010-03-23 2012-12-12 斑马株式会社 圆珠笔
CN102821972B (zh) * 2010-03-23 2015-04-08 斑马株式会社 圆珠笔

Also Published As

Publication number Publication date
JPH0413390U (enrdf_load_stackoverflow) 1992-02-03

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