US3432244A - Writing instrument - Google Patents

Writing instrument Download PDF

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Publication number
US3432244A
US3432244A US569426A US3432244DA US3432244A US 3432244 A US3432244 A US 3432244A US 569426 A US569426 A US 569426A US 3432244D A US3432244D A US 3432244DA US 3432244 A US3432244 A US 3432244A
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US
United States
Prior art keywords
cam
casing
guide
actuating member
guide edge
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
US569426A
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English (en)
Inventor
Helmut Karl Bross
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Individual
Original Assignee
Individual
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Publication date
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Publication of US3432244A publication Critical patent/US3432244A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B43K24/086—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 heart-shaped cams, balls

Definitions

  • the present invention relates to a Writing instrument which is provided with a mechanism which permits the writing element, for example, a ball-point insert or refill, to be moved axially Within the casing of the instrument from a retracted position to a forward or writing position or vice versa and to be arrested in either of these positions.
  • a writing element for example, a ball-point insert or refill
  • One of these operating members is provided with at least one control cam which is movable in a radial direction relative to the longitudinal axis of the instrument and which is arranged to be pressed by a resilient force against the other operating member. When the actuating member is moved, this control cam will slide along guide edges which are provided on the other operating member, and it will thereby be moved selectively to end positions in which it will be arrested when the Writing element is in either the advanced or retracted positions.
  • the angular displacement of the sections of the different guide edges relative to each other constitutes an essential feature of the invention which is necessary for avoiding improper functions of the mechanism.
  • the actuating member from its retracted position is larger than the distance between the arresting positions.
  • the forward arresting position will not be reached until under the action of the spring the actuating member or the cam has again been moved back for a short distance from its farthest possible advanced position-
  • the guide edges according to the invention may be provided by step-shaped projections or recesses, which may be in the form of slot-shaped apertures, or by grooves, on one of the two operating members.
  • the high wear resistance of the mechanism according to the invention is due to the fact that, when the strongest load is exerted upon the actuating member, that is, when it is advanced from its retracted position, the control cam only needs to carry out a movement in a direction substantially parallel to the longitudinal axis of the instrument or its casing, while the movement of the control cam in the peripheral direction which is superimposed upon the longitudinal movement will not occur until the actuating member moves back from its farthest advanced position to the retracted position.
  • the actuating member will then be relieved of the actuating pressure which is exerted thereon by the finger.
  • the movement of the control cam in the peripheral direction may cause the actuating member to be likewise turned. If such a turning of the actuating member is undesirable, provisions have to be made to insure that the control cam will move in the peripheral direction independently of the actuating member. This may be attained, for example, by providing the control cam on an arm which is secured to the actuating member and adapted to be bent not only in the radial direction, but also in the peripheral direction.
  • the control cam and the arm which might carry the same will oppose a peripherally directed force with such a resistance that the actuating member will be taken along in the peripheral direction by the movement of the control cam.
  • the arm carrying the control cam should therefore be incapable of bending in the peripheral direction.
  • the guide edges are generally provided on the inner side of the casing of the writing instrument or, when employing a pressure cap, they are provided on the outer side of the casing, it is in principle also possible to provide the guide edges on the actuating member.
  • the control cam and the arm on which the cam might be mounted would in such a case be provided on the casing of the Writing instrument.
  • the improvements according to the invention consist primarily in designing the different parts of the mechanism, which are usually made of plastic and produced by injection molding, so as to be of a very simple shape, to permit them to be easily and quickly assembled, to operate properly at all times even though the extent of their relative movement is relatively small, and to be wear-resistant so that the writing instrument will be fully operative for a very long time.
  • FIGURE 1 shows, partly in section, a side view of a ball-point pen according to the invention, in which the actuating member is in its retracted position;
  • FIGURE 2 shows a view similar to FIGURE 1, in which the actuating member is in its depressed position
  • FIGURE 3 shows a perspective view of the actuating member in the form of a pushbutton for a writing instrument according to the invention
  • FIGURE 4 shows a side view of the most important part of a writing instrument according to a modification of the invention
  • FIGURE 5 shows a cross section which is taken along the line V-V of FIGURE 4;
  • FIGURE 6 shows a longitudinal section of the rear part of a two-piece casing according to another modification of the invention.
  • FIGURE 7 shows a view of the rear casing part according to FIGURE y6, as seen in the direction of the arrow A; while FIGURE 8 shows an enlarged view of the part of the casing containing the guide edges.
  • the writing instrument comprises a casing 1 in which an actuating member in the form of a push button 2 and a writing element 3, for example, in the form of a ball-point insert or refill, are slidable in the axial direction.
  • an actuating member in the form of a push button 2 and a writing element 3, for example, in the form of a ball-point insert or refill, are slidable in the axial direction.
  • Spring 4 acts at one end upon a shoulder 1 on the inner wall of the casing and at its other end upon a flange 3" on the refill 3.
  • the part of the pushbutton 2 which is at all times located within the casing 1 is provided with an arm S which may be integral with the member 2.
  • the free end of this arm is provided with a control cam 6 which projects toward the wall of casing 1 and has an inclined surface 6 extending at an angle downwardly and inwardly from its upper free end.
  • cam 6 On its upper side, cam 6 is provided with a work surface 6" which cooperates with the guide edges on the other operating member. As shown in FIGURE 3, this Work surface 6" is inwardly inclined from its outer edge.
  • the guide edges 11, 9, and 7 are inclined in accordance with the inclination of work surface 6 of the cam.
  • the inclination of these guide edges is designated in FIGURE 4 by the numerals 11', 9', and 7. This inclination of the guide edges and of the work surface of the cam insures a proper engagement of this work surface with the guide edges and thus a proper function of the mechanism.
  • the guide edges for the control cam 6 are formed by slot-shaped apertures in the wall of casing 1, as may be seen particularly in FIG- URES 1, 2, and 4.
  • the upper guide edge 11, the central or intermediate guide edge 7 and the lowest guide edge 9 are disposed above each other and are inclined relative to the vertical longitudinal axis of the writing instrument, and the upper guide edge 11 is inclined in the upward direction to the right and the two other guide edges 7 and 9 in the downward direction to the right.
  • FIGURES 1, 2, and 4 also indicate the angular displacement of the guide edge sections, as previously described.
  • the control cam 6 is arrested in its rear end position in which the pushbutton 2 and the refill 3 are in their retracted position.
  • This position of the control cam 6 is f determined by a stop corner 12 at the upper end of the guide edge 11. If a pressure is exerted upon the pushbutton 2 so as to push the latter forwardly, the inclined surface 6 of cam 6 runs against the edge of the slot directly opposite to the guide edge 11.
  • This edge portion 12 upon which the cam then engages is preferably. designed so that the cam will not be acted upon by a force which tends to press the cam in the direction toward the remote end of the guide edge 11, and this edge portion 12' therefore preferably extends at a right angle to the longitudinal axis of casing 1.
  • Cam 6 is thus pressed inwardly, whereby a spring force is produced in the radically resilient arm 5g which causes the cam ⁇ 6 at a further forward movement of the pushbutton 2 to engage upon the part of the guide edge 7 which is located underneath the stop corner 12 within a line extending parallel to the axis of the casing. If the pushbutton 12 is then released, cam 6 will slide under the action of spring 4 along the guide edge 7 to the upper end thereof forming a stop corner 8. When cam 6 is in this position which is indicated in FIGURE 2, the pushbutton 2 and the refill 3 will be arrested in their forward position in which the writing tip 3' of the refill will project from the casing 1.
  • cam 6 when the pushbutton 2 is pushed forwardly from the position as shown in FIG- URES l and 4, it is, however, also possible that cam 6 while moving substantially parallel to the axis of the casing might be moved beyond the guide edge 7 to the farthest forward position. It is important that the cam will then not pass to the guide edge 9 so that when the pushbutton 2' is released and cam ⁇ 6 moves back, it will not ⁇ be prevented from engaging with the guide edge 7 and from sliding to the stop corner 8.
  • cam 6 engages upon the edge 8 which also extends at a -right angle to the longitudinal axis of the casing and thereby moves out of the stop corner 8 and finally snaps in its farthest forward position behind the part of the lowest guide edge 9 which lies underneath the stop corner 8 and along which cam 6 will slide when ythe pushbutton 2' is released until it finally engages upon the guide edge 11 which permit the cam to slide back to the stop corner 12.
  • Guide edge 10 which, as shown in FIGURES l and 2, is likewise formed by a slot-shaped aperture in the wall of the casing and connects the upper and lower guide edges with each other prevents the cam 6 from moving to the central guide edge 7.
  • the end surface 2' of the pushbutton is made of a spherical shape so that only a small friction will occur between the finger and the pushbutton 2 and the pushbutton may therefore be easily turned.
  • the direction of the movement of the control cam t6 is once more indicated in FIGURE 8 by the arrows on the dot-and-dash line.
  • the mechanism is designed so as to prevent the pushbutton from turning.
  • Casing 1 as well as the pushbutton 2 are for this purpose made of a square cross section.
  • arm 5 In order to permit the control cam 6 to move in a peripheral direction even though the pushbutton is prevented from turning, arm 5 must be capable of bending in the peripheral direction.
  • the inner side of the wall of casing 1 is provided with longitudinal ribs 13 and 14 which extend parallel to the axis of the casing and form guide edges 10 for guiding the cam 6 when moving during the actuation of pushbutton 2 from the stop corner 12 to the guide edge 7 or from the guide edge 9 to the guide edge 11 along aline which extends substantially parallel to the axis of the casing.
  • Arm of the embodiment according to the invention as illustrated in FIGURE 4 will be in its so-called neutral position, i.e. in the position in which no spring force will act upon the arm in the peripheral direction, when cam 6 is located in the stop corner 8.
  • Arm 5 may, however, also be mounted on pushbutton Z so that the neutral position Will occur in any other position of cam 6, for example, in the stop comer .12.
  • the guide edges which extend substantially parallel to the axis of the casing between the guide edges 11, 7, and 9 should in any event be designed so as to prevent the arm 5 from bending to an undesirable extent in lateral directions.
  • the edge -portions 12 and 8 are designed to as to have a small incline in the direction opposite to that of the guide edges 11 and 7.
  • the guide edges 11, 7, and 9 lare formed by slot-shaped apertures in the wall of casing 1 they are formed in the embodiment according to FIGURES 6 and 7 by offsetting certain surface parts 16, 15, 18, and 17 of the inner side of the casin'g in steps relative to each other.
  • the surface is farther toward the outside from the longitudinal axis of casing 1 than the surface 16, surface 18 is farther toward the outside than surface 15, and surface 17 is farther to'ward the outside than surface 18.
  • a guide edrge is fonmed which extends parallel to the axis of the easing and along which cam 6 will slide when it moves from the inclined lguide edge 9' to the guide edge 11.
  • a beveled part 20 is provided upon which cam 6 will slide so as to be lifted to the level of surface 15.
  • This modification of the mechanism maybe employed especially if the easing consists of two parts.
  • the pushbutton may then be inserted into the rear part of the casing from the opening in the front side thereof.
  • a writing instnument having a front end and a rear end *and provided with at least one writing element slidable in the direction of the axis of said instrument, and a control mechanism for selectively moving said writing element forwardly into a forward position for writing and for retracting it into a retracted position and for arresting said writing element in its fonward position or in its retracted position
  • said mechanism comprising two operating members movable relative to each other in the axial direction of said instrument, one of said operating members constituting a casing for said instrument surrounding said writing element and having at said front end of said instrument a front opening throuigh which said writing element moves, and the other of said operating members including an actuating member at said rear end of said instrument, said actuating member having an actuating end, being operatively associated with said Writing element, and being arranged to be depressed so as to act upon said writing element, and a spring associated with said Writing element for acting against the fonward movement of said actuating member and said writing element and tending
  • a writing instrument as defined in claim 1 Iwherein the inclination of said uppermost guide edge extends in the opposite direction to the inclination of the other two of said guide edges.
  • edges of said grooves opposite to said stop corners of the lguide edges extend at right angles to the longitudinal axis of said casing.
  • said other operating member is tubular and has an inner wall provided with Ia plurality of intermediate surface parts between which said guide edlges are formed so as to be sp'aced at different distances from the axis of said casing.
  • an inclined surface is provided and positioned for permitting said cam to slide from that surface iwhich is most remote from said actuating end of said actuating member to that surface Iwhich is nearest to said actuating end.
  • a writing instrument as defined in claim 1 further comprising an arm integral with said actuating member and wherein said actuating member is prevented from turning, said cam is mounted on said arm, said arm is arranged to be bent both in radial and peripheral directions for producing a resilient force.
  • a writing instrument as defined in claim 3- additionally comprising a further guide edge extending parallel to the axis of said instrument along the path of movement of said cam from said lotwest to ⁇ said uppermost guide edge, said further guide edge being provided on a groove fwhich connects said grooves on ywhich said uppermost and lower guide edges are provided.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US569426A 1965-08-02 1966-08-01 Writing instrument Expired - Lifetime US3432244A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0083108 1965-08-02

Publications (1)

Publication Number Publication Date
US3432244A true US3432244A (en) 1969-03-11

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ID=6981809

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Application Number Title Priority Date Filing Date
US569426A Expired - Lifetime US3432244A (en) 1965-08-02 1966-08-01 Writing instrument

Country Status (5)

Country Link
US (1) US3432244A (cs)
CH (1) CH452392A (cs)
DE (1) DE1461349A1 (cs)
FR (1) FR1560226A (cs)
GB (1) GB1099569A (cs)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5145272A (en) * 1989-03-22 1992-09-08 Merz & Krell Gmbh & Co. Projectable and retractable, push button writing instrument
DE4401218A1 (de) * 1994-01-18 1995-07-20 Ritter Jacob Gmbh Co Kg Schreibstiftmechanik, insbesondere für Kugelschreiber
US5944436A (en) * 1998-04-08 1999-08-31 Hau Mei Industrial Co., Ltd. Pen possible to sound
WO2002018153A1 (de) * 2000-09-01 2002-03-07 Merz & Krell Gmbh & Co. Kgaa Schreibgeraet mit einteiliger mechanikkomponente
EP1428683A1 (en) * 2002-12-13 2004-06-16 Société BIC Writing Instrument, particularly a Ballpoint Pen
CN101988532B (zh) * 2009-08-03 2012-08-22 台湾扣具工业股份有限公司 按压扣具
CN109605983A (zh) * 2018-12-26 2019-04-12 杭州简弈科技有限公司 一种挤压旋转笔

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2064671A5 (cs) * 1969-10-08 1971-07-23 Bourbon & Fils Ets
DE2206378C3 (de) * 1972-02-10 1975-07-03 Martinus Karel Petrus Mierlo Jonkers (Niederlande) Druckmechanik für ein Schreibgerät, insbesondere Kugelschreiber
DE29901784U1 (de) * 1998-11-19 2000-03-23 Hermann Böhler GmbH, 68723 Schwetzingen Schreibgerät

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894355A (en) * 1957-06-13 1962-04-18 Wpc Entpr Inc Writing instrument mechanism
US3196839A (en) * 1962-06-07 1965-07-27 Real Patentauswertungs Anstalt Operating mechanism for ball point pens and the like which may be pressed in a single piece with the snap members

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB894355A (en) * 1957-06-13 1962-04-18 Wpc Entpr Inc Writing instrument mechanism
US3196839A (en) * 1962-06-07 1965-07-27 Real Patentauswertungs Anstalt Operating mechanism for ball point pens and the like which may be pressed in a single piece with the snap members

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5145272A (en) * 1989-03-22 1992-09-08 Merz & Krell Gmbh & Co. Projectable and retractable, push button writing instrument
DE4401218A1 (de) * 1994-01-18 1995-07-20 Ritter Jacob Gmbh Co Kg Schreibstiftmechanik, insbesondere für Kugelschreiber
DE4401218C2 (de) * 1994-01-18 2002-10-24 Ritter Jacob Gmbh Co Kg Schreibstiftmechanik, insbesondere für Kugelschreiber
US5944436A (en) * 1998-04-08 1999-08-31 Hau Mei Industrial Co., Ltd. Pen possible to sound
WO2002018153A1 (de) * 2000-09-01 2002-03-07 Merz & Krell Gmbh & Co. Kgaa Schreibgeraet mit einteiliger mechanikkomponente
US20040018036A1 (en) * 2000-09-01 2004-01-29 Siegbert Vial Writing untensil with single-piece mechanical component
AU2003268896B8 (en) * 2002-12-13 2004-07-09 Societe Bic Writing instrument, particularly a ballpoint pen
WO2004054816A1 (en) * 2002-12-13 2004-07-01 Societe Bic Writing instrument, particularly a ballpoint pen
EP1428683A1 (en) * 2002-12-13 2004-06-16 Société BIC Writing Instrument, particularly a Ballpoint Pen
US20060024120A1 (en) * 2002-12-13 2006-02-02 Nicolas Paillot Writing instrument
US7128489B2 (en) 2002-12-13 2006-10-31 Societe Bic Writing instrument
AU2003268896B2 (en) * 2002-12-13 2008-01-03 Societe Bic Writing instrument, particularly a ballpoint pen
CN100395123C (zh) * 2002-12-13 2008-06-18 Bic学会 书写工具
CN101988532B (zh) * 2009-08-03 2012-08-22 台湾扣具工业股份有限公司 按压扣具
CN109605983A (zh) * 2018-12-26 2019-04-12 杭州简弈科技有限公司 一种挤压旋转笔
CN109605983B (zh) * 2018-12-26 2020-05-22 温州市简系文具有限公司 一种挤压旋转笔

Also Published As

Publication number Publication date
FR1560226A (cs) 1969-03-21
CH452392A (de) 1968-05-31
GB1099569A (en) 1968-01-17
DE1461349A1 (de) 1969-05-14

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