EP0545917B1 - Writing instrument - Google Patents

Writing instrument Download PDF

Info

Publication number
EP0545917B1
EP0545917B1 EP93200572A EP93200572A EP0545917B1 EP 0545917 B1 EP0545917 B1 EP 0545917B1 EP 93200572 A EP93200572 A EP 93200572A EP 93200572 A EP93200572 A EP 93200572A EP 0545917 B1 EP0545917 B1 EP 0545917B1
Authority
EP
European Patent Office
Prior art keywords
eraser
guide
guide member
tubular member
flange
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.)
Expired - Lifetime
Application number
EP93200572A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0545917A2 (en
EP0545917A3 (en
Inventor
Kazumi Nakajima
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.)
Pentel Co Ltd
Original Assignee
Pentel Co Ltd
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 Pentel Co Ltd filed Critical Pentel Co Ltd
Priority claimed from EP88906023A external-priority patent/EP0321581B1/en
Publication of EP0545917A2 publication Critical patent/EP0545917A2/en
Publication of EP0545917A3 publication Critical patent/EP0545917A3/en
Application granted granted Critical
Publication of EP0545917B1 publication Critical patent/EP0545917B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/08—Writing-core feeding mechanisms with the writing-cores fed by screws
    • 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
    • B43K24/06—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by turning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00—Combinations of writing implements with other articles
    • B43K29/02—Combinations of writing implements with other articles with rubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L19/00—Erasers, rubbers, or erasing devices; Holders therefor
    • B43L19/0056—Holders for erasers
    • B43L19/0068—Hand-held holders
    • B43L19/0075—Hand-held holders of the pencil type
    • B43L19/0081—Hand-held holders of the pencil type of the mechanical pencil type

Definitions

  • the present invention relates to a writing instrument which is capable of pushing out, as much as required, an elongated eraser through the rear end thereof, and more specifically, relates to a writing instrument of the type described above, which is convenient to use and which requires no complicated construction, a writing instrument excellent in productivity and capable of being produced at a low cost.
  • Japanese Utility Model Publication (Unexamined) No.57-132598(1982) discloses a structure in which a spiral groove formed on the inner surface of the rear barrel is engaged with projections of an approximately cylindrical eraser holder. The projections protrude through a slit provided in the lead container, the eraser being pushed out by rotating the rear barrel.
  • Japanese Utility Model Publication No. Japanese Utility Model Publication No.
  • 62-27438(1987) discloses a writing instrument structure enabling the eraser to be pushed out in the same manner as disclosed in the above-described publication No.57-132598 except that it utilizes the spiral groove of an elastic member in the form of a spiral tube and a longitudinal groove formed in the rear barrel.
  • WO-A-86/03658 and US-A-3124245 show similar spiral arrangements to those discussed above, but in these references the advancing and retracting of lipsticks is involved.
  • a writing instrument comprising a tubular member having a spiral groove, an eraser guide member having at least one longitudinal guide groove, said tubular member being rotatable with respect to said eraser guide member, and an eraser holder having a projection slidably arranged in the or each guide groove of said eraser guide member, characterised in that the guide groove or guide grooves of the eraser guide member are closed at the ends thereof, that the guide member comprises a flange and an engagement shoulder formed thereon, and that a deformable securing member engages with said engagement shoulder of the guide member and an engagement flange of said tubular member.
  • the invention also provides a writing instrument comprising a tubular member having a spiral groove, an eraser guide member having at least one longitudinal guide groove, said tubular member being rotatable with respect to said eraser guide member, and an eraser holder having a projection slidably arranged in the or each guide groove of said eraser guide member, characterised in that the guide groove or guide grooves of the eraser guide member are closed at the ends thereof, that the tubular member comprises a flange and an engagement shoulder formed thereon, and that a deformable securing member engages with said engagement shoulder of the tubular member and an engagement flange of said guide member.
  • FIG. 1-A shows a writing instrument according to a first embodiment of the present invention.
  • a front metal section 43 having a well-known lead detent member 42 is screwed on the front portion of the barrel 41.
  • a lead container 45 including an adjacent chuck 44 at the front end portion thereof.
  • a spiral spring S is provided between the lead container 45 and the barrel 41, and a chuck ring 46 is slidably fitted over the front portion of the chuck 44.
  • a tubular member 47 having a spiral groove 47a is held between a rear end flange 48b of an eraser guide member 48 and a securing member 50.
  • the eraser guide member 48 has longitudinal guide grooves 48a and is irrotatably arranged between the barrel 41 and the lead container 45.
  • the rear end flange 48b serves to prevent an eraser holder 51, which is to be described later, from being broken.
  • the securing member 50 is composed of a deformable C-ring (see Fig. 1-B) engaged with an engagement shoulder 49 of an eraser guide member 48 and a flange 49A of the tubular member 47, and has a cutout.
  • the section of the ring may be circular or polygonal, and the cutout may not be provided if the securing member itself has elasticity in the radial direction.
  • the tubular member 47 is rotatably arranged with respect to the eraser guide member 48.
  • the flange 48b may be formed as a member independent of the eraser guide member 48.
  • the flange 48b and the engagement shoulder 49 may be provided in the tubular member, with the flange 49A being on the eraser guide member 48 (see Fig. 5-A).
  • An eraser holder 51 is adapted to secure the eraser 10, and projections 51a of the eraser holder 51 protrude through the guide grooves 48a of the eraser guide member 48 and engage with the spiral groove 47a of the tubular member 47.
  • Fig. 1-A shows a push-type mechanical pencil, in which the mechanism of the mechanical pencil in the front section is separated from the eraser pushing-out mechanism in the rear section.
  • the front section has a known mechanical pencil mechanism, so that only the rear section, i.e. the eraser pushing-out mechanism, will be described.
  • the eraser holder 51 is inserted through the guide groove 48a of the eraser guide member 48 and slidably arranged with respect to the eraser guide member 48.
  • the guide groove 48a is formed integrally with the flange 48b (see Fig. 2), a desirable effect may be obtained in that the eraser holder is kept from being detached and the number of parts and elements can be reduced.
  • the portion of the guide member 48 in the vicinity of the guide groove 48a is deformable, insertion of the eraser holder 51 is facilitated.
  • a further desirable effect may be obtained by effecting chamfering or the like at the portion near where the guide groove 48a is in contact with the eraser holder 51.
  • the tubular member 47 is inserted into the eraser guide member 48 at the front end thereof until it abuts the flange 48b.
  • the securing member 50 is engaged from the front end of the eraser guide member 48. It is secured when returning to its normal state.
  • the eraser 10 is press-fitted into the eraser holder 51.
  • This movement causes the projections 51a to move backward along the guide grooves 48a.
  • the eraser holder 51 carrying the eraser 10 moves backwards, causing the eraser 10 to protrude beyond the rear end of the mechanical pencil.
  • a member which has elasticity in the longitudinal direction for example, a coil spring, a one-turn spring (Fig. 3), or a ring having a plurality of flanges 50a (Fig. 4-B) or claws (Fig. 5-B) be adopted as the securing member 50.
  • the setting of the rotational loads which has been conventionally effected by friction, can then be conducted by adjusting the elasticity of the securing member, so that stable rotational loads can be obtained. Further, it is desirable to fix a ring 55 restraining the radial movement of the fixed securing member 50, as shown in Fig. 6, because this prevents the securing member from being detached.
  • continuous recesses 53a and projections 53b are provided in the tubular member 47 engaged with the securing member 50 and the engagement shoulder 49 or the opposing shoulder of the eraser guide member 48, respectively, it becomes possible to effect an appropriate resistance when rotating the tubular member 47, so that any unnecessary rotation during the eraser projection operation can be prevented as possible.
  • the number of the recesses 53a and the projections 53b may be one or more for each.
  • by adjusting the configuration and the number of the recesses 53a and projections 53b and the configuration of the securing member for example, projections 54 may be provided in a ring 50, as shown in Fig.
  • the above-described writing instrument has a simple construction in which a flange and an engagement shoulder are formed in either the tubular member or the eraser guide member, and the tubular member is rotatably secured to the eraser guide member by merely engaging a deformable securing member with the engagement shoulder.
  • the tubular member is then held between the flange and the securing member. Accordingly, the writing instrument of the present invention is easily assembled. Moreover, since the securing member is positively engaged with the engagement shoulder, securing reliability can be maintained for a long period of time.
  • the eraser guide member may, as to the case with the prior art shown, be provided exteriorly (the guide grooves are then formed into longitudinal grooves, instead of slit-like ones) and the tubular member having a spiral groove may be provided interiorly.
  • the spiral groove can then be a spiral tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
EP93200572A 1987-07-25 1988-06-22 Writing instrument Expired - Lifetime EP0545917B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP11435987 1987-07-25
JP114359/87U 1987-07-25
EP88906023A EP0321581B1 (en) 1987-06-27 1988-06-22 Writing utensil

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP88906023A Division EP0321581B1 (en) 1987-06-27 1988-06-22 Writing utensil
EP88906023.2 Division 1988-06-22

Publications (3)

Publication Number Publication Date
EP0545917A2 EP0545917A2 (en) 1993-06-09
EP0545917A3 EP0545917A3 (en) 1993-08-25
EP0545917B1 true EP0545917B1 (en) 1998-03-18

Family

ID=14635751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93200572A Expired - Lifetime EP0545917B1 (en) 1987-07-25 1988-06-22 Writing instrument

Country Status (3)

Country Link
EP (1) EP0545917B1 (ja)
JP (1) JPH0624236Y2 (ja)
DE (1) DE3856151T2 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7775734B2 (en) 2007-02-01 2010-08-17 Sanford L.P. Seal assembly for retractable instrument
US7850382B2 (en) 2007-01-18 2010-12-14 Sanford, L.P. Valve made from two materials and writing utensil with retractable tip incorporating same
US8221012B2 (en) 2008-11-07 2012-07-17 Sanford, L.P. Retractable instruments comprising a one-piece valve door actuating assembly
US8226312B2 (en) 2008-03-28 2012-07-24 Sanford, L.P. Valve door having a force directing component and retractable instruments comprising same
US8393814B2 (en) 2009-01-30 2013-03-12 Sanford, L.P. Retractable instrument having a two stage protraction/retraction sequence

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2585911Y2 (ja) * 1993-04-12 1998-11-25 株式会社壽 棒状物繰り出し容器
JPH0839988A (ja) * 1994-07-27 1996-02-13 Kotobuki:Kk 棒状物繰り出し容器
JPH08150798A (ja) * 1994-11-28 1996-06-11 Pentel Kk シャ−プペンシル
US6964534B2 (en) * 2003-06-26 2005-11-15 Binney & Smith Inc. Retractable writing instrument
FR2926244B1 (fr) 2008-01-16 2010-02-19 Bic Soc Instrument d'ecriture muni d'une gomme protegee par un manchon
JP6778611B2 (ja) * 2016-12-27 2020-11-04 株式会社パイロットコーポレーション 熱変色性筆記具
CN110356143B (zh) * 2019-07-27 2020-08-11 杭州简弈科技有限公司 一种提拉笔

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124245A (en) * 1964-03-10 Lipstick container
JPS57132598U (ja) * 1981-02-13 1982-08-18

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409658A (en) * 1945-05-04 1946-10-22 Eyelet Specialty Co Cosmetic container
FR989522A (fr) * 1949-06-24 1951-09-10 Bimeca étui à fard à double usage
FR1123390A (fr) * 1955-03-10 1956-09-20 Bâtonnets décolorant l'encre
FR2574640B1 (fr) * 1984-12-18 1987-02-13 Oreal Dispositif pour appliquer un produit pateux, notamment un produit cosmetique tel que du rouge a levres, et element tubulaire pour un tel dispositif

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124245A (en) * 1964-03-10 Lipstick container
JPS57132598U (ja) * 1981-02-13 1982-08-18

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7850382B2 (en) 2007-01-18 2010-12-14 Sanford, L.P. Valve made from two materials and writing utensil with retractable tip incorporating same
US8246265B2 (en) 2007-01-18 2012-08-21 Sanford, L.P. Valve made from two materials and writing utensil with retractable tip incorporating same
US7775734B2 (en) 2007-02-01 2010-08-17 Sanford L.P. Seal assembly for retractable instrument
US8226312B2 (en) 2008-03-28 2012-07-24 Sanford, L.P. Valve door having a force directing component and retractable instruments comprising same
US8221012B2 (en) 2008-11-07 2012-07-17 Sanford, L.P. Retractable instruments comprising a one-piece valve door actuating assembly
US8393814B2 (en) 2009-01-30 2013-03-12 Sanford, L.P. Retractable instrument having a two stage protraction/retraction sequence
US8568047B2 (en) 2009-01-30 2013-10-29 Sanford, L.P. Retractable instrument having a two stage protraction/retraction sequence

Also Published As

Publication number Publication date
JPH0624236Y2 (ja) 1994-06-29
EP0545917A2 (en) 1993-06-09
DE3856151T2 (de) 1998-10-29
DE3856151D1 (de) 1998-04-23
JPH0174194U (ja) 1989-05-19
EP0545917A3 (en) 1993-08-25

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