EP2467267B1 - Schaltmechanismus für ein schreibinstrument - Google Patents

Schaltmechanismus für ein schreibinstrument Download PDF

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Publication number
EP2467267B1
EP2467267B1 EP11741430.0A EP11741430A EP2467267B1 EP 2467267 B1 EP2467267 B1 EP 2467267B1 EP 11741430 A EP11741430 A EP 11741430A EP 2467267 B1 EP2467267 B1 EP 2467267B1
Authority
EP
European Patent Office
Prior art keywords
slide
guide bushing
switching mechanism
sleeve
writing
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.)
Active
Application number
EP11741430.0A
Other languages
English (en)
French (fr)
Other versions
EP2467267A1 (de
Inventor
Oliver Schmidt
Werner Merkle
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.)
Gebrueder Schmidt Fabrik fuer Feinmechanik GmbH and Co KG
Original Assignee
Gebrueder Schmidt Fabrik fuer Feinmechanik GmbH and Co KG
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Publication date
Application filed by Gebrueder Schmidt Fabrik fuer Feinmechanik GmbH and Co KG filed Critical Gebrueder Schmidt Fabrik fuer Feinmechanik GmbH and Co KG
Priority to PL11741430T priority Critical patent/PL2467267T3/pl
Publication of EP2467267A1 publication Critical patent/EP2467267A1/de
Application granted granted Critical
Publication of EP2467267B1 publication Critical patent/EP2467267B1/de
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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
    • B43K24/06—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

Definitions

  • the present invention relates to a switching mechanism for a writing instrument, said switching mechanism having a mechanism sleeve with an upper portion and a lower portion for accommodating a writing insert, and having a guide bushing, which guide bushing has its lower portion arranged in the upper portion of the mechanism sleeve, wherein actuation of the guide bushing results in actuation of the writing insert, the guide bushing is mounted on the mechanism sleeve such that it can be rotated but cannot be displaced in the longitudinal direction, a slide being arranged in the upper portion of the mechanism sleeve, beneath the guide bushing, wherein actuation of the guide bushing results in a movement of the slide relative to the mechanism sleeve, and this relative movement of the slide results in actuation of the writing insert, the guide bushing and the slide, and the slide and the mechanism sleeve, have provided between them in each case a control curve, in which control curve a control element runs, and one of the two control curves has a circumferential component,
  • T he mechanism sleeve here may itself be provided with a writing-instrument tip, and therefore the mechanism sleeve constitutes, at the same time, the shank of the writing instrument, by which the user grips the writing instrument.
  • the writing insert is actuated via the guide bushing.
  • the switching mechanism is prefabricated from the mechanism sleeve and guide bushing and then installed in grip tubes which meet the aesthetic requirements to which high-quality writing instruments are subjected.
  • a writing-instrument tip is then screwed onto the lower end of the switching mechanism, and an actuating part is provided at the upper end, this actuating part usually being plugged onto the guide bushing.
  • Writing insert within the context of the present invention, is understood to mean a unit which either is configured for accommodating lead cores or is itself configured as a writing core and is designed, at its upper end, such that it ends up in abutment against an actuating part of the switching mechanism and is actuated by the actuating part being moved in the longitudinal direction of the mechanism sleeve.
  • the writing cores here are biased into their retracted position by a compression spring, which is accommodated in the front end of the writing instrument, whereas, in the case of a writing insert for lead cores, there is an inner compression spring provided, and this biased the displaceable upper end of the writing insert into its starting position.
  • actuating part By virtue of the actuating part being moved downwards, in the case of a lead-core writing insert, a lead core is advanced in a stepwise manner, whereupon the actuating part is pushed back up into its starting position directly by the force of the inner compression spring.
  • a writing core is expended counter to the force of the compression spring by virtue of the actuating part being moved downwards, wherein the actuating part latches in its lower position. If the actuating part is moved out of the latching position again, the writing core is retracted again by the force of the compression spring and the actuating part moves upwards into its starting position.
  • a “switching mechanism”, within the context of the present invention, is a rotary mechanism. Accordingly, the actuating part is a rotary knob which, when rotated in one direction or the other, gives rise to a movement of a slide in the downward or upward direction, this slide, for its part, acting on the lead-core writing insert or on the writing core.
  • the rotary knob once rotated in a first direction in order to advance the lead core, is rotated back into its starting position again directly via the slide, which moves upwards again in the writing insert under the force of the inner compression spring.
  • the writing insert in contrast, is a spring-loaded writing core, i.e. a cartridge
  • at least one control curve has an undercut in which, with the tip of the writing core extended, the control element latches under the force of the compression spring when the rotary knob has been rotated to a corresponding extent in a first direction. If the rotary knob is rotated back in the opposite direction to the extent where the control element is freed from the undercut again, then the rotary knob is rotated back into its starting position, by the interaction of the control curve and control element, under the force of the compression spring.
  • the viscosity of the lubricants is usually temperature-dependent, and therefore heat and cold likewise have an adverse effect on the switching behaviour of the known switching mechanisms.
  • document JP 2002/307892 A discloses a pushing mechanism wherein a rotor is connected to the pushbutton which is damped in its longitudinal movement by means of a superimposed rotational movement. To this end, a damping member is provided that is in communication with the rotor via its shank.
  • the space between this shank and the rotor is filled up with a viscous body like fats or oil, such that damping arises from movement of the rotor and/or damping member within the viscous body.
  • the known pushing mechanism has the same disadvantages as mentioned above, which disadvantages also occur in connection with rotary switching mechanisms damped by lubricants.
  • Rotary switching mechanisms in general are known from CH 259 469 A , DE 958 992 B , BE 362 878 A , GB 2 059 359 A , and US 5,890,827 A .
  • Document US 5,890,827 A discloses a writing instrument having a frictional circular member provided between an inner tube and an outer tube of the instrument for absorbing variations in the dimensions of the associated parts and for providing a frictional resistance when turning the respective parts with respect to each other.
  • the inventors have thus gone down a route which contrasts with the prior art, where the friction between parts of the switching mechanism is always to be avoided, or adjusted in a specific and damped manner, by lubricants.
  • an additional mechanical damping member can be used in a switching mechanism precisely such that it indirectly influences the movement of the guide bushing by friction.
  • Indirect influencing of the movement of the guide bushing is understood to mean a damping member which is provided on the slide or acts on the slide, the damping of the movement of the slide therefore being transmitted to the movement of the guide bushing.
  • This damping can be used both for lead-core writing inserts and for writing cores or cartridges.
  • the guide bushing, slide and mechanism sleeve here may consist of the same material or of different materials, wherein use is possibly made of an antiseize agent, which is intended to prevent sliding surfaces from catching on one another and "seizing up". This antiseize agent, however, is not required for the damping itself.
  • the degree of damping can be determined here by the mechanical properties of the damping member, wherein the material of the damping member, the coefficient of friction thereof, the geometrical configuration thereof, the resilient component thereof, etc. all contribute to this.
  • the invention thus makes constant damping possible, irrespective of ageing, number of operation cycles and of the respective temperature, for which purpose use is made of a radially acting damping member.
  • This rotary mechanism can be used both for writing instruments with writing cores which are biased via a compression spring plugged onto the tip of the writing core and for lead-core writing inserts provided with an inner compression spring.
  • lower or front end is understood to mean the region at or around the front tip of the writing instrument, where the core projects out of the grip tube and the writing instrument is gripped by the user.
  • upper or rear end means that region of the writing instrument which is remote from the lower end, that is to say where the guide bushing is arranged.
  • damping member acts either between the slide and the mechanism sleeve or between the slide and the guide bushing.
  • the damping is achieved by a damping member that is biased against a counter-surface by spring or resilient forces, and that preferably exerts a linear frictional action.
  • a short, preferably linear relative movement between the damping member and a respective counter-surface ensures the soft-switching characteristic of the novel switching mechanism.
  • the damping member has a frictional body which butts, under resilient stressing, against an inner surface of the mechanism sleeve or against an inner surface of the guide bushing.
  • the frictional body is formed integrally on a resilient arm which, for its part, is formed integrally with the slide, wherein the frictional body is arranged either on a lower portion or on an upper portion of the slide and projects radially outwards beyond the outer contour thereof.
  • the slide may be produced in a single piece, for example, from plastics material, wherein the frictional force is defined via the material and the extent to which the frictional body projects beyond the outer contour of the slide. Furthermore, the resilient behaviour of the resilient arm influences the damping.
  • the frictional body is arranged on a control element which is connected to the slide and runs in a control curve, which control curve is arranged on the inside of the mechanism sleeve.
  • control element which is necessary for converting the rotary movement of the rotary knob into the linear movement of the slide, can also be formed integrally with the damping member.
  • Fig. 1 schematically shows a side view, in longitudinal section, of a writing instrument 10.
  • the writing instrument 10 comprises a switching mechanism 11 with a tubular mechanism sleeve 12, which has a lower portion 14 and an upper portion 15.
  • a writing insert 16 is introduced into the lower portion 14, this writing insert, in the present case, being a writing core 17 with a narrow front end 18.
  • the narrow front end 18 of the writing core 17 has pushed onto it a compression spring 19, which is supported on the inside of a writing-instrument tip 21, which is screwed to the mechanism sleeve 12 via a thread 22.
  • the writing core 17 is thus pushed to the right in Fig. 1 , where it has its upper end surface 23 butting against a collar 24, which is formed on a lower portion 25 of a sleeve-like slide 26.
  • the slide 26 has a shank 27, located on its tubular upper portion, seated in a lower portion or shank 28 of a guide bushing 29, which has its lower shank 28 inserted into the upper portion 15 of the mechanism sleeve 12.
  • the lower shank 28 of the guide bushing 29 has arranged on it an outwardly projecting, encircling latching bead 31, which interacts with a shoulder 32, arranged on the inside of the mechanism sleeve, such that the guide bushing is retained on the mechanism sleeve in a captive, but rotatable, manner.
  • the guide bushing 29 has its head 33 seated on the outside of the mechanism sleeve 12.
  • a control block 34 which acts as a control element and on which is provided a damping member indicated at 35, which damping member butts against a counter-surface, namely an inner wall 36 in the upper portion 15 of the mechanism sleeve 12 and, there, ensures damping of the movement of the slide 26, and thus of the guide bushing 29, in a manner which is yet to be described.
  • Fig. 2 illustrates the slide 26 in a perspective view at the top and in longitudinal section at the bottom.
  • the damping member 35 has a frictional body 37 which is connected, via a resilient arm 38, to the control block 34, on which control block are provided a rear control surface 39 and a lateral guide surface 41.
  • Fig. 3 shows a perspective illustration of the guide bushing 29, of which the lower shank 28 has a control curve 43 which is arcuate, that is to say runs part of the way in the circumferential direction, and terminates in an undercut 44.
  • control surface 39 on the slide 26, then, interacts with the control curve 43 such that, when the guide bushing 29 is rotated, the slide 26 is moved in the axial direction.
  • control block 34 which acts as control element, runs along the arcuate control curve 43 by way of its control surface 39.
  • Fig. 4 shows a perspective, sectional illustration of the mechanism sleeve 12, on the inner wall 36 of which is provided, in the region of the upper portion 15, a thickening 46, in which a linear control curve 47 is introduced.
  • control block 34 In the assembled state of the switching mechanism 11, the control block 34, then, has its opposite guide surfaces 41 located in the control curve 47, and at the same time it has its control surface 39 butting against the control curve 43.
  • Rotation of the guide bushing 29 thus gives rise to a movement path of the control block 34 relative to the guide bushing 29, which path is indicated at 45, wherein the linear control curve 47 prevents the slide 26 from rotating therewith.
  • Fig. 5 shows, in an illustration like that in Fig. 1 , the novel writing instrument for the case where the guide bushing has been rotated to the extent where the slide has been moved to the left in Fig. 5 and the control block 34 ends up located in the undercut 44.
  • the writing core 17 has had its front tip 51 extended out of the writing-instrument tip 21.
  • Figs. 6 to 8 illustrate further embodiments of the guide bushing 29, mechanism sleeve 12 and slide 26, in which embodiments the guide bushing 29 has a linear control curve 52 arranged on it, while an arcuate control curve 54 with undercut 55 is arranged in the inside of the mechanism sleeve 12.
  • control block 34 now projects radially out of the control curve 52, beyond the shank 28 of the guide bushing 29, where the control surface 39 on the control block 34 interacts with the arcuate control curve 54, which is oriented to the left in Fig. 7 , and latches in the undercut 55.
  • the mechanical damping member 35 in this case, rather than being arranged on the control block 34, is arranged with circumferential offset on the upper shank 27 of the slide 26, such that the frictional body 37 projects once again, by the extent of projection 42, beyond the outer contour, although this is now formed by the shank 27, which has a smaller diameter than the collar 24.
  • the shank 27 is thus seated in the shank 28 of the guide bushing such that the control block 34 runs in the linear control curve 52 and projects radially outwards beyond the same, in order to be able to come into abutment with the control curve 54 by way of the control surface 39.
  • the circumferentially offset damping member has its frictional body 37 in abutment with a counter-surface, namely an inner wall 53 of the lower shank 28 of the guide bushing 29, and it ensures damping friction there.

Landscapes

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

Claims (10)

  1. Schaltmechanik für ein Schreibgerät (10), die eine Mechanikhülse (12) mit einem oberen Abschnitt 15 und einem unteren Abschnitt (14) zur Aufnahme eines Schreibeinsatzes (16) sowie eine mit ihrem unteren Abschnitt (28) in dem oberen Abschnitt (15) der Mechanikhülse (12) angeordnete Führungsbuchse (29) aufweist, wobei eine Betätigung der Führungsbuchse (29) zu einer Betätigung des Schreibeinsatzes (16) führt, die Führungsbuchse (29) drehbar und in Längsrichtung unverschieblich an der Mechanikhülse (12) gelagert ist, in dem oberen Abschnitt (15) der Mechanikhülse (12) unterhalb der Führungsbuchse (29) ein Schieber (26) angeordnet ist, wobei eine Betätigung der Führungsbuchse (29) zu einer Bewegung des Schiebers (26) relativ zu der Mechanikhülse (12) und diese relative Bewegung des Schiebers (26) zu einer Betätigung des Schreibeinsatzes (16) führt, und zwischen Führungshülse (29) und Schieber (26) sowie zwischen Schieber (26) und Mechanikhülse (12) je eine Steuerkurve (43, 47; 52, 54) vorgesehen ist, in denen ein Steuerelement (34) läuft, und eine der beiden Steuerkurven (43, 54) eine Umfangskomponente aufweist, so dass eine Drehung der Führungshülse (29) zu einer Längsbewegung des Schiebers (26) führt,
    dadurch gekennzeichnet, dass ein zusätzliches mechanisches Dämpfungsglied (35) vorgesehen ist, das die Bewegung der Führungsbuchse (29) durch Reibung bedämpft.
  2. Schaltmechanik nach Anspruch 1, dadurch gekennzeichnet, dass das mechanische Dämpfungsglied (35) durch Federkräfte der elastische Kräfte gegen eine Gegenfläche (36; 37) vorgespannt ist und eine lineare Reibwirkung ausübt.
  3. Schaltmechanik nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Dämpfungsglied (35) zwischen dem Schieber (26) und der Mechanikhülse (12) wirkt.
  4. Schaltmechanik nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Dämpfungsglied (35) einen Reibkörper (37) aufweist, der unter Federspannung an einer Innenfläche (36) der Mechanikhülse (12) anliegt.
  5. Schaltmechanik nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Dämpfungsglied (35) zwischen dem Schieber (26) und der Führungsbuchse (29) wirkt.
  6. Schaltmechanik nach Anspruch 5, dadurch gekennzeichnet, dass das Dämpfungsglied (35) einen Reibkörper (37) aufweist, der unter Federspannung an einer Innenfläche (53) der Führungsbuchse (29) anliegt.
  7. Schaltmechanik nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Reibkörper (37) einstückig an einem Federarm (38) ausgebildet ist, der seinerseits einstückig mit dem Schieber (26) ausgebildet ist.
  8. Schaltmechanik nach Anspruch 7, dadurch gekennzeichnet, dass der Reibkörper (37) an dem unteren Abschnitt (25) des Schiebers (26) angeordnet ist und radial nach außen über dessen Außenkontur (24) vorragt.
  9. Schaltmechanik nach Anspruch 7, dadurch gekennzeichnet, dass der Reibkörper (37) an dem oberen Abschnitt (27) des Schiebers (26) angeordnet ist und radial nach außen über dessen Außenkontur (27) vorragt.
  10. Schaltmechanik nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass der Reibkörper (37) an einem mit dem Schieber (26) verbundenen Steuerelement (34) angeordnet ist, das in einer Steuerkurve (47; 54) läuft, die innen an der Mechanikhülse (12) angeordnet ist.
EP11741430.0A 2010-07-30 2011-07-26 Schaltmechanismus für ein schreibinstrument Active EP2467267B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11741430T PL2467267T3 (pl) 2010-07-30 2011-07-26 Mechanizm przełączający dla przyrządu piszącego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010033695A DE102010033695A1 (de) 2010-07-30 2010-07-30 Schaltmechanik für ein Schreibgerät
PCT/EP2011/062784 WO2012013649A1 (en) 2010-07-30 2011-07-26 Switching mechanism for a writing instrument

Publications (2)

Publication Number Publication Date
EP2467267A1 EP2467267A1 (de) 2012-06-27
EP2467267B1 true EP2467267B1 (de) 2014-03-12

Family

ID=44532807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11741430.0A Active EP2467267B1 (de) 2010-07-30 2011-07-26 Schaltmechanismus für ein schreibinstrument

Country Status (4)

Country Link
EP (1) EP2467267B1 (de)
DE (1) DE102010033695A1 (de)
PL (1) PL2467267T3 (de)
WO (1) WO2012013649A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110239260A (zh) * 2019-06-24 2019-09-17 文成县简创科技有限公司 一种错位内旋笔

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110239261B (zh) * 2019-06-24 2020-11-17 温州市简系文具有限公司 一种错位卡扣压缩笔
EP4311684A1 (de) * 2022-07-26 2024-01-31 Société BIC Schreibinstrumente

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE362878A (de) *
CH259469A (de) * 1943-11-29 1949-01-31 Limited Henry Weinberger Schreibstift.
DE958992C (de) * 1951-01-25 1957-02-28 Scripto Inc Fuellschreibstift
GB2059359B (en) * 1979-09-25 1983-06-02 Ancos Co Ltd Mechanical pencil
US5890827A (en) * 1995-10-23 1999-04-06 Kotobuki & Co., Ltd. Bar extruding implement with ejector
US6039484A (en) * 1998-06-22 2000-03-21 Kotobuki & Co., Ltd. Writing instrument
JP2002307892A (ja) * 2001-04-16 2002-10-23 Suemine Takahashi ボールペン

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110239260A (zh) * 2019-06-24 2019-09-17 文成县简创科技有限公司 一种错位内旋笔

Also Published As

Publication number Publication date
WO2012013649A1 (en) 2012-02-02
DE102010033695A1 (de) 2012-02-02
PL2467267T3 (pl) 2014-09-30
EP2467267A1 (de) 2012-06-27

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