EP0538503B1 - Stylo à bille avec une came rotative - Google Patents

Stylo à bille avec une came rotative Download PDF

Info

Publication number
EP0538503B1
EP0538503B1 EP19910117922 EP91117922A EP0538503B1 EP 0538503 B1 EP0538503 B1 EP 0538503B1 EP 19910117922 EP19910117922 EP 19910117922 EP 91117922 A EP91117922 A EP 91117922A EP 0538503 B1 EP0538503 B1 EP 0538503B1
Authority
EP
European Patent Office
Prior art keywords
cam
rotary
bar
projections
outer sleeve
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
EP19910117922
Other languages
German (de)
English (en)
Other versions
EP0538503A1 (fr
Inventor
Shuhei Kageyama
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.)
Kotobuki and Co Ltd
Original Assignee
Kotobuki and 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 Kotobuki and Co Ltd filed Critical Kotobuki and Co Ltd
Priority to ES91117922T priority Critical patent/ES2069172T3/es
Priority to DE1991607458 priority patent/DE69107458T2/de
Priority to EP19910117922 priority patent/EP0538503B1/fr
Publication of EP0538503A1 publication Critical patent/EP0538503A1/fr
Application granted granted Critical
Publication of EP0538503B1 publication Critical patent/EP0538503B1/fr
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
    • 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
    • B43K24/084—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 with saw-like or analogous cams

Definitions

  • the present invention relates to a rotary-cam ball-point pen in which a refill pen point can be pushed out of the head member of the ball-point pen against the elasticity of an elastic body by knocking the rear end of the ballpoint pen.
  • the ball-point pen can be maintained with the pen point pushed out of the head member of the ball-point pen, by a rotary-cam engaging a cam body.
  • the pen point can be withdrawn into the head member of the ball-point pen by the elasticity of the elastic body by releasing the engagement of the rotary-cam with the cam body.
  • a conventional rotary-cam ball-point pen as it is described for example in FR-A-1156612 and EP-A-0407002 has an outer sleeve, a rotary-cam mechanism comprised of a cam body provided on the inside of the outer sleeve, a rotary-cam engaging the cam body, and a cam bar engaging the rotary-cam.
  • a refill, being a rear portion is loaded backward by a spring provided between the head member screwed on the forward end of the outer sleeve and a spring bearing formed on the refill so that the rear portion of the refill is forced into the rotary-cam.
  • the ball-point pen according to EP-A-0407002 which represents the prior art as referred to in the pre-characterising portion of claim 1, shows a rotary cam follower provided with axially extending ribs being inserted into respective grooves of a stationary cam. Additionally a knocking rod of the ballpoint pen is provided with projections extending axially outwardly and being inserted in respective guide slots or slits in the cylinder of the pen in order to ensure a stable action of the knocking rod.
  • said projections may be in the form of a peripheral flange extending around the entire outer surface of the knocking rod.
  • said guiding slots or slits are replaced by a cylindrical recess. But this makes it necessary to take additional measures to limit rotation of the knocking rod within the cylinder.
  • a rotary-cam ball-point pen has the above-mentioned structure, when the rotary-cam mechanism and refill are set in the outer sleeve, the rotary-cam mechanism and refill are inserted from the forward end of the outer sleeve in a state where the rear portion of the refill is inserted into the rotary-cam, an elastic body is put on the forward portion of the refill, and the head member is screwed on the forward end of the outer sleeve by which the rotary-cam, the refill, the elastic body and the head member are set up.
  • the cam bar is inserted into the outer sleeve from the rear end of the outer sleeve, while the cam bar is deformed inward by the elasticity of the cam bar, which elasticity enables the projections of the cam bar to get over the rear portion of the cam body into grooves of the cam body by which the attachment of the cam bar to the cam body is made.
  • the number of parts is decreased, and less time is required for assembly of parts.
  • the cam body may be provided with a guide, which guides the projections of the cam bar.
  • the guide guides the projections of the cam body.
  • the cam bar may be formed with slits, slots or cuts.
  • the slits, slots or cuts give flexibility to the cam body so that the cam bar can deform inward by applying a radial force to get over the rear portion of the cam body and go into the grooves of the cam body.
  • a rotary-cam ball-point pen comprises outer sleeve 1, and cam mechanism 5 comprised of cam body 2 provided on the inside of the rear part of outer sleeve 1, Rotary-cam 3 engages cam body 2 and cam bar 4 engages rotary cam 3, and refill 7.
  • Cam body 2 may be formed integrally with outer sleeve 1 or cam body 2 may be attached to the inside of outer sleeve 1 by a force fit, adhesion, or screwing.
  • Spring 6 is provided between spring bearing 14 on refill 7 with its rear, end is inserted in to rotary cam 3 and head member 13 removably screwed on the forward end of outer sleeve 1. The attachment of head member 13 to outer sleeve 1 is made by insertion, engagement, or screwing.
  • Cam bar 4 has a structure with flexibility in which the cam bar can be distorted inward by applying a radial force.
  • the number of projections 84 of cam bar 4 equals the number of grooves 9 of cam body 2, for example 9, but usually less than 6, or for example 2(Figs 3(a) and (b) ). Pairs of projections are diametrically opposed.
  • the number of projections 163 of rotary cam 3 is 3 in this case (Figs. 3(a) and (b) ).
  • cam faces 174 of cam bar 4 engage cam face 183 of rotation cam 3, and projections 84 of cam bar 4 and projections 163 of rotary-cam 3 are inserted into grooves 9 of cam body 2. Further, the engagement of cam face 183 of rotary cam 3 with cam face 192 of cam body 2, and the insertion of projections 163 of rotary-cam 3 into grooves 9 of cam body 2 are alternatively made.
  • Reference number 21 designates a clip formed integrally with cam bar 4.
  • Fig. 2 illustrates in vertical section an important part of a second embodiment which has the same structure as the first embodiment, in which headed cam, body 2 is attached to the inside of the rear end of outer sleeve 1 by screwing.
  • cam bar 4 When pen point 20 of refill 7 is drawn into head member 13 of outer sleeve 1, the rear end of cam bar 4 is knocked releasing cam faces 183 of rotary cam 3 from cam faces 192 of cam body 2. Thereafter projections 163 of rotary cam 3 and projections 84 of cam bar 4 are inserted into grooves 9 of cam body 2 while refill 7 is moved backward drawing pen point 20 of refill 7 into head member 13.
  • cam bar 4 is inserted into outer sleeve 1 from the rear side it is possible to form a clip 21 from the integral part of cam bar 4 (Fig. 1), or a decoration having a size larger than the outside diameter, or a knocking cap.
  • cam body 2 may be provided with guide 10 as shown in Fig. 4 which guides projections 84 of cam bar 4 so that the projections are easily inserted into grooves 9 of cam body 2.
  • cam bar may be formed with slit or slot 11(Fig. 3(a) ), or cut 12( Figs. 5 and 6), which facilitates cam bar 4 deforming inward to get over rear portion 15 of cam body 2 to enter into grooves 9 of cam body 2.
  • Slits 11 may be slits having one side open.

Landscapes

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

Claims (5)

  1. Stylo à bille à came rotative comportant un manchon extérieur (1), des moyens (5) formant mécanisme à came rotative, lesdits moyens (5) formant mécanisme à came rotative comportant un corps de came (2) situé à l'intérieur dudit manchon extérieur (1), une came rotative (3) étant en prise avec ledit corps de came (2), et une barre de came (4) en prise avec ladite came rotative (3), le stylo à bille à came rotative comportant en outre des moyens (7) formant recharge pour écriture situés à l'intérieur dudit manchon extérieur (1) ayant une partie arrière insérée dans ladite came rotative (3), lesdits moyens (7) formant recharge pour écriture étant rappelés vers ladite came rotative (3) par des moyens élastiques (6), ladite barre de came (4) étant constituée de matériau flexible de telle sorte qu'elle puisse se déformer vers l'intérieur en appliquant une petite force radiale pour faciliter l'assemblage, caractérisé en ce que
       ladite came rotative (3) est munie de saillies (16₃) insérées à l'intérieur de gorges (9) du corps de came (2) et en ce que la barre de came (4) est munie de saillies (8₄) également insérées à l'intérieur desdites gorges (9) du corps de came (2).
  2. Stylo à bille selon la revendication 1, caractérisé en ce que lesdites saillies (8₄) sont insérées de manière coulissante à l'intérieur desdites gorges (9) et en ce que le nombre de gorges (9) ne dépasse pas le nombre de saillies (8₄).
  3. Stylo à bille selon la revendication 1 ou 2, caractérisé en ce que ledit corps de came (2) comporte des moyens de guidage (10) desdites plusieurs saillies de barre de came (8₄).
  4. Stylo à bille selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ladite barre de came (4) comporte au moins une fente (11) pour aider à assembler ladite barre de came (4) dans ledit corps de came (2).
  5. Stylo à bille selon la revendication 4, caractérisé en ce que ladite barre de came (4) comporte une découpe autour desdites plusieurs saillies (8₄) pour rendre lesdites plusieurs saillies (8₄) déformables pour faciliter l'assemblage.
EP19910117922 1991-10-21 1991-10-21 Stylo à bille avec une came rotative Expired - Lifetime EP0538503B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES91117922T ES2069172T3 (es) 1991-10-21 1991-10-21 Pluma de punta de bola de leva giratoria.
DE1991607458 DE69107458T2 (de) 1991-10-21 1991-10-21 Kugelschreiber mit einem drehbaren Nocken.
EP19910117922 EP0538503B1 (fr) 1991-10-21 1991-10-21 Stylo à bille avec une came rotative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19910117922 EP0538503B1 (fr) 1991-10-21 1991-10-21 Stylo à bille avec une came rotative

Publications (2)

Publication Number Publication Date
EP0538503A1 EP0538503A1 (fr) 1993-04-28
EP0538503B1 true EP0538503B1 (fr) 1995-02-15

Family

ID=8207271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910117922 Expired - Lifetime EP0538503B1 (fr) 1991-10-21 1991-10-21 Stylo à bille avec une came rotative

Country Status (3)

Country Link
EP (1) EP0538503B1 (fr)
DE (1) DE69107458T2 (fr)
ES (1) ES2069172T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1270936B (it) * 1993-05-12 1997-05-16 Stilolinea Srl Penna a sfera di montaggio semplificato
DE4326838C2 (de) * 1993-08-10 1996-01-11 Interelektrik Ges M B H & Co K Bistabiles Magnetventil
JP4425618B2 (ja) * 2003-12-08 2010-03-03 吉田プラ工業株式会社 ノック式スライドケース
JP6608161B2 (ja) * 2015-04-20 2019-11-20 三菱鉛筆株式会社 ノック式筆記具

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB854313A (en) * 1955-08-30 1960-11-16 Kahn David Inc Improvements in or relating to writing instruments
FR1358869A (fr) * 1963-03-29 1964-04-17 Ideal S R L Minuterie Metallic Dispositif de commande à bouton-poussoir pour stylos à bille
GB1192116A (en) * 1968-09-04 1970-05-20 Helmut Bross Writing Instrument
JPH0753993Y2 (ja) * 1989-07-07 1995-12-13 株式会社パイロット 筆記体の出没機構

Also Published As

Publication number Publication date
EP0538503A1 (fr) 1993-04-28
ES2069172T3 (es) 1995-05-01
DE69107458T2 (de) 1995-06-22
DE69107458D1 (de) 1995-03-23

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