EP2234818A2 - Writing instrument with eraser protected by a sleeve - Google Patents

Writing instrument with eraser protected by a sleeve

Info

Publication number
EP2234818A2
EP2234818A2 EP09703407A EP09703407A EP2234818A2 EP 2234818 A2 EP2234818 A2 EP 2234818A2 EP 09703407 A EP09703407 A EP 09703407A EP 09703407 A EP09703407 A EP 09703407A EP 2234818 A2 EP2234818 A2 EP 2234818A2
Authority
EP
European Patent Office
Prior art keywords
sleeve
barrel
writing instrument
support
instrument according
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Withdrawn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
EP09703407A
Other languages
German (de)
French (fr)
Inventor
Franck Rolion
Richard O'brien
Samuel Malinverni
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.)
BIC SA
Original Assignee
BIC SA
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 BIC SA filed Critical BIC SA
Priority to EP17193457.3A priority Critical patent/EP3284614A1/en
Publication of EP2234818A2 publication Critical patent/EP2234818A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/003—Propelling pencils with lead sections or lead cartridges

Definitions

  • the present invention generally relates to a writing instrument comprising a barrel extending longitudinally between a front end provided with a writing tip and a rear end, further comprising a gum output device which comprises: an eraser able to assume a maximum output configuration and a retraction configuration in which it is at least partly protected; a gum protection sleeve having a generally cylindrical inner surface movable with respect to the gum is between a first position for which the gum is in the retraction configuration and a second position for which the gum is in the maximum output configuration; an eraser holder to which the eraser is attached, means for permitting relative translation movement between the eraser holder and the sleeve in the longitudinal direction.
  • a first category of writing instruments of this type relates to devices in which the rubber support is movable in translation and prohibited from rotation relative to the barrel, and the protective sleeve is rotatable relative to the barrel while being forbidden translation except possibly for the actuation of a mechanism for advancing a writing cartridge.
  • the means for prohibiting the rotation of the rubber support relative to the barrel conventionally comprise at least one first longitudinal guiding member such as a groove or a rib provided on the support and cooperating directly with a first complementary longitudinal guiding member provided on a prohibited part of rotation relative to the drum.
  • the means for allowing a relative translation movement between the rubber support and the sleeve conventionally comprise at least one second guide member such as a helical groove or a lug provided on the support and cooperating with a second complementary guiding member integral with the muff.
  • the rubber support has at the front a tubular projection of polygonal section slidably fitted with contact around a rear portion of the mine reservoir tube which has a section of complementary shape. The translational movement of the rubber support is thus guided with prevention of rotation relative to the mine reservoir tube.
  • the rubber support is surrounded throughout its length by the protective sleeve which comprises a tubular projection slidable against the inner wall of the barrel.
  • This device however has certain disadvantages, in particular because two tubular elements are arranged radially between the mine reservoir tube and the barrel, which leaves a small central diametral space and penalizes the capacity of the mine reservoir. Radials are required between the tubular members within the barrel so that they can slide against each other, and the multiplicity of these sets compromises the maintenance in axial alignment of the rubber holder with the barrel.
  • a second category concerns devices in which the rubber support is prohibited from translation relative to the barrel, except possibly for the actuation of a mechanism for advancing a writing cartridge, and the protective sleeve is movable at less in translation with respect to the barrel.
  • the rubber support is generally integrally connected to the rear end of a mine reservoir tube movable in translation in the barrel only for mine advance.
  • the eraser support therefore remains stationary in the barrel when the protective sleeve is moved between the retraction configuration and the maximum output configuration of the eraser.
  • JP2558803Y2 An example of a writing instrument in this second category is described by the registered Japanese utility model JP2558803Y2, which relates to a mechanical pencil whose lead advance is actuated by a push of the user on the sleeve protection to move the latter in translation with the mine reservoir tube.
  • the sleeve has a front portion surrounding the rear end of the barrel.
  • the rubber support is integrally connected to the rear end of the reservoir tube by an intermediate tube comprising reliefs cooperating with locking means provided on the sleeve to immobilize the sleeve in one or the other configuration of retraction or maximum output of the eraser.
  • the device has certain disadvantages, in particular because the locking means are relatively difficult to manufacture and may also be accidentally unlocked by the user during a scrubbing.
  • the device does not include a locking system of the lead advance, which has the consequence that the use of the eraser by holding the writing instrument by the barrel may cause the advancement of the support of gum towards the barrel and thus an undesired lead advance.
  • the present invention aims at providing an alternative solution to these prior gum output devices, which in particular makes it possible to simplify the production of the gum output devices both in the first and in the second category mentioned above.
  • the subject of the invention is a writing instrument as defined in a general manner in the foregoing, further comprising the following characteristics: the mobility of the protective sleeve with respect to the drum is effected at least in rotation;
  • the rubber support is provided with at least one first longitudinal guiding member cooperating directly with a first complementary longitudinal guiding member integral with the barrel to prevent any rotational movement between the support and the barrel, and is provided with at least one a second guiding member cooperating with a second complementary guiding member secured to the sleeve so that the rotation of the sleeve causes the relative translation movement between the support and the sleeve in the longitudinal direction;
  • the sleeve has a front portion surrounding the rear end of the barrel and a rear portion not surrounding the barrel which has an inner guide surface having the second complementary guide member;
  • the rubber support is able to slide directly against the inner wall of the barrel and has an outer guide surface having the second guide member.
  • the barrel comprises stop means capable of cooperating with a front end edge of the sleeve to prevent axial displacement of the sleeve towards the barrel at least in the maximum output configuration of the rubber.
  • the outer surface for guiding the rubber support is adjacent to the inner guide surface of the sleeve, and the at least one second guide member is radially projecting outwards and is axially offset towards the rear of the rubber support by report to said at least one first longitudinal guide member; said second complementary guiding member is a groove formed in said inner surface for guiding the sleeve; the rubber support has a front projection extending longitudinally and whose outer surface forms at least approximately a cylinder;
  • the groove constituting said second complementary guide member forms a helical path in the inner surface of the guide sleeve, and the rubber holder has two second laterally opposite guide members engaged in said groove.
  • the sleeve is connected to the barrel so as to be rotatable relative to the barrel without the possibility of displacement in translation, this arrangement being particularly suitable for a writing instrument whose advance of a writing cartridge is actuated by a push member disposed laterally on the barrel;
  • the barrel comprises a rear portion having a substantially cylindrical outer wall surrounded by the front portion of the sleeve and which comprises at least two protuberances arranged in a peripheral circle, said front portion having an inner wall having an annular groove in which said protuberances are engaged ;
  • said at least one first longitudinal guiding member is formed by a flat portion extending longitudinally on the outer surface of the front projection of the support, and the rear portion of the barrel has an inner wall on which is formed at least one flat part constituting a said first complementary longitudinal guide member;
  • the writing instrument comprises a mechanism for advancing a writing cartridge, the drum comprises a first essentially tabular piece traversed laterally by an actuating button of said feed mechanism and furthermore comprises a second piece essentially tabular comprising the first complementary longitudinal guide member and fixedly connected to said first piece.
  • the writing instrument comprises a mechanism for advancing a writing cartridge, the eraser support is integrally connected to a reservoir tube of said advance mechanism disposed inside the barrel coaxially with said support; and able to slide in translation with said support to actuate said feed mechanism;
  • the front projection of the rubber support and the outer surface for guiding said support are substantially cylindrical, and the outer diameter of said outer guide surface is greater than the outer diameter of said projection before being substantially equal to the diameter of the inner wall; of the drum:
  • said at least one first longitudinal guiding member is formed by a protrusion protruding outwardly on said outer surface for guiding the eraser holder, and a said first complementary longitudinal guiding member is formed by a longitudinal slot formed in the barrel, said slot opening onto the rear end of the barrel and being adapted to allow translational sliding of said protuberance without the possibility of rotation;
  • the barrel has a substantially cylindrical outer wall and comprises a rear projection whose outside diameter is smaller than the outside diameter of the barrel, so that the outer surface of the barrel forms an annular shoulder constituting said stop means adapted to cooperate with a front end edge of the sleeve, the front portion of the sleeve having a diameter interior substantially equal to the outer diameter of said rear projection;
  • the sleeve is formed by the assembly of two parts, respectively front and rear, having internal guiding surfaces of the same diameter, each inner guiding surface being adjacent to the external guiding surface of the rubber support and having at least one edge constituting a cam path, the respective cam paths of the two parts of the sleeve being shaped such that a groove is created delimited by two cam paths vis-à-vis longitudinally once the two parts assembled, each groove constituting a said second complementary guiding member;
  • the rear portion of the sleeve has a substantially circular front opening of a certain diameter and the front portion of the sleeve has a rear projection comprising at least one said cam path, said rear projection having an outer surface defining a cylinder whose diameter is substantially equal to the diameter of the front opening of the rear portion of the sleeve, to allow a friction fit of said rear projection in the rear portion of the sleeve;
  • the rear portion of the sleeve comprises two substantially helical and symmetrical cam paths relative to one another with respect to a longitudinal axis, each cam path extending angularly between a first angular positioning element and a second angular positioning element that are diametrically opposed and formed; by projections to the front of the inner guiding surface of said rear portion of the sleeve, and the front portion of the sleeve comprises two substantially helical and symmetrical cam paths with respect to a longitudinal axis between which are formed two diametrically spaced slots opposing means for receiving said first and second angular positioning members;
  • the rubber support is made in a single tubular part with the reservoir tube of the writing cartridge.
  • Figure la shows schematically a perspective view of a writing instrument according to the invention, wherein the protective sleeve is prohibited translation and is rotatable relative to the fut.
  • Figure Ib schematically shows an exploded perspective view of the writing instrument of Figure la.
  • Figure 2a schematically shows a partial view in longitudinal section of the writing instrument of Figure la, in a first rotational position of the sleeve for which the rubber is in the retraction configuration.
  • Figure 2b schematically shows a cross-sectional view of the writing instrument of Figure 2a in the plane I-I.
  • FIG. 3 schematically shows a partial view in longitudinal section of the writing instrument of Figure la, in a second rotational position of the sleeve for which the eraser is in the maximum output configuration.
  • FIG. 4 schematically represents an exploded partial view in longitudinal section of a writing instrument according to the invention, in which the protective sleeve is movable in translation and in rotation with respect to the drum.
  • FIG. 5 schematically represents a partial exploded perspective view of the writing instrument shown in FIG. 4.
  • FIG. 6a schematically represents a partial view in longitudinal section of the writing instrument represented in FIG. first position of the sleeve for which the rubber is in the retraction configuration.
  • Figure 6b schematically shows a partial perspective view of the writing instrument shown in Figure 6a.
  • Figure 7a schematically shows a partial view in longitudinal section of the writing instrument shown in Figure 4, in a second position of the sleeve for which the eraser is in the maximum output configuration.
  • Figure 7b schematically shows a partial perspective view of the writing instrument shown in Figure 7a.
  • Figure 8 schematically shows a perspective view of a part of the barrel of the writing instrument of Figure la.
  • Figure 9 schematically shows a partial perspective view of the eraser holder of the writing instrument of Figure la.
  • FIG. 10 schematically shows a broken perspective view of the protective sleeve of the writing instrument of Figure la.
  • FIG. 11 schematically represents a perspective view of the rear part of the protective sleeve of the writing instrument of FIG. 4.
  • FIG. 12 schematically represents a perspective view of the front portion of the protective sleeve of the writing instrument of FIG. 4.
  • a writing instrument in FIGS. 1a and 1b, comprises a protective sleeve 50 which is prevented from translating and mobile in rotation with respect to the drum.
  • the term "barrel” designates an external body of the instrument comprising a portion for the grip, this member may consist of several elements assembled together.
  • the sleeve 50 has a generally cylindrical inner surface, and has at its rear axial end an opening 4 for the passage of a rubber 40 fixed on a support 30.
  • a clip 59 is formed integrally with the sleeve 50.
  • Two radially flexible opposite arms 36 are provided on the rubber support 30 for fixing the front end of the rubber 40.
  • the outer surface of these flexible arms is part of an outer guide surface 33 of the support, on which two lugs 32 laterally opposed project.
  • the gum carrier 30 has a longitudinally extending forward projection whose outer surface forms approximately one cylinder, two laterally extending longitudinally extending flats 31 formed along the projection 35.
  • the barrel comprises a first substantially tubular element 12 mounted in a front portion 1 of the writing instrument which has a writing tip 2 and a writing cartridge (not shown) with a mine reservoir tube 10, and comprises in addition a second substantially tubular element 20 firmly fitted on the first element 12.
  • the first element 12 of the drum is surrounded by a gripping sleeve 13, and is traversed laterally by a button 14 of a feed mechanism of the cartridge. known writing in itself. It is understood that two elements 12 and 20 of the fut could alternatively be made in one piece. In what follows, for the sake of simplification, the second element 20 is called the was.
  • the barrel 20 includes a front portion 23 and a rear portion 24 both having a substantially cylindrical outer wall.
  • Several protuberances 24A disposed in a peripheral circle project from the outer wall of the rear portion 24.
  • This rear portion 24 further has an inner wall on which are formed two flats 21 laterally opposite.
  • abutment means 22 delimiting the rear portion 24 with respect to the front portion 23 are formed by an annular portion protruding outwardly from the barrel 20.
  • the sleeve 50 comprises a front portion 54 surrounding the rear portion 24 of the barrel and adapted to slide in rotation directly against the outer wall of said rear portion.
  • This front portion 54 has an inner wall having an annular groove 54A in which the protuberances 24A of the are engaged.
  • the front end edge 55 of the sleeve 50 is positioned substantially in abutment against the annular portion 22 of the sleeve 20. In this way, even in the case of a particularly strong pressure exerted on the eraser while the user holds it. instrument by the barrel, the sleeve remains in position relative to the barrel.
  • the sleeve further comprises a rear portion 51 which has an inner guide surface 53 adjacent to the outer guide surface 33 of the gum carrier.
  • a groove 52 of generally helical shape, producing a guide path for the lugs 32 of the rubber support 30, is formed on the inner guiding surface 53. The cooperation of the lugs 32 with the groove 52 allows the rotation of the sleeve 50 to cause moving the rubber support 30 relative to the sleeve.
  • the front projection 35 of the gum holder 30 has a substantially cylindrical bore 37 open at its forward end and which includes a bottom wall 38 at its rear end. As shown elsewhere on the view in perspective of Figure 9, this bottom wall 38 has a central opening 39 adapted to allow the reloading of mines 3.
  • the mine reservoir tube 10 is disposed internally to the f ⁇ tt 20 and the gum support 30, coaxially with those- ci, and has a rear end engaged in the bore 37 of the support.
  • This reservoir tube 10 is shaped to occupy most of the depth of the bore 37 in the retracting configuration of the eraser 40 shown in Figure 2a.
  • the sleeve 50 has an annular shoulder 56 directed radially inwards at the opening 4 for the passage of the rubber 40 and flush with the surface of the eraser.
  • This annular shoulder participates in blocking the rubber in the radial direction, and constitutes an abutment against which the flexible arms 36 of the rubber support 30 abut in the maximum output configuration of the rubber as shown in FIG. 3, thus preventing said carrier out of the sleeve.
  • the end of the front projection 35 of the eraser holder remains surrounded by the rear end 25 of the barrel, so that the eraser holder is prevented from rotating.
  • the front projection 35 of the rubber support slides directly against the inner wall of the barrel 20, which has the advantage of reinforcing the keeping in axial alignment of the rubber support with the barrel and consequently to limit the alignment deviations the support caused by the efforts transversals exerted on the eraser in use.
  • FIG. 4 and 5 another embodiment of a writing instrument according to the invention is partially shown in exploded view, respectively in longitudinal section and in perspective.
  • a protective sleeve 150 is formed by assembling two parts, a front portion 150B and a rear portion 150A, and is movable in translation and rotation relative to a barrel 120.
  • a clip 151 is formed integrally with the rear portion. 150A of the sleeve, but it is understood that the presence of a clip is not necessary for the invention.
  • a rubber support 130 which is prevented from rotating relative to the barrel 120, is able to slide in translation in the barrel only to actuate a mechanism for advancing a writing cartridge (not represented). It has a projection before 135 extending longitudinally and whose outer surface forms a cylinder. It furthermore has a substantially cylindrical outer guide surface 133 whose diameter D 133 is greater than the outside diameter of the front projection 135 and is substantially equal to the diameter D 120 of the inside wall of the barrel 120.
  • An annular shoulder 134 is formed at the junction between the outer guide surface 133 and the front projection 135. At a radial extension of this annular shoulder, a first longitudinal guide member 131 is formed by a protuberance projecting externally on the outer guide surface 133.
  • two second laterally opposite guide members 132 are each formed by a lug protruding outwardly on the outer guide surface 133. These two lugs 132 are arranged according to a diameter of the cylinder formed by the outer guide surface 133, but it could nevertheless be pre seen a certain shift of the longitudinal position of the lugs.
  • the projection before 135 of the rubber support 130 is fitted inside a mine reservoir tube 110 of the writing cartridge, this tube being able to slide in translation inside the barrel 120 to actuate the mechanism advance of the writing cartridge.
  • the fitting is carried out so that the mine reservoir tube 110 is integral in translation with the rubber support 130.
  • the annular shoulder 134 of the rubber support 130 serves as a stop for the rear end of the reservoir tube 110.
  • the front projection of the rubber support has no internal passage and a fitting requiring only moderate effort can be provided so that the user can separate the rubber support with the reservoir tube to reload mines said tube and can reassemble these two elements without particular difficulty.
  • the rubber support and the reservoir tube are made in a single tubular part, in which case the outer surface for guiding the support consists of a rear portion of the reservoir tube, and said first guide member. longitudinal and second guide members are preferably made by molding with this tubular piece.
  • the barrel 120 has a substantially cylindrical outer wall and comprises a rear projection 124 whose outer diameter is smaller than the outside diameter of the barrel. This rear projection 124 has a longitudinal slot 121 opening on the rear end 125 of the barrel.
  • This slot 121 constitutes a first complementary longitudinal guide member adapted to allow sliding in translation and without the possibility of rotation of the protuberance 131 forming the first longitudinal guiding member of the eraser support 130.
  • the outer radius of the protrusion 131 n does not exceed the outer radius of the rear projection 124 of the barrel.
  • the front portion 150B and the rear portion 150A of the protective sleeve 150 are provided to be force-fitted into each other so as to avoid any risk of mutual separation under normal conditions of use.
  • the front portion 150B has a front portion 154 surrounding the rear end 125 of the barrel.
  • This front portion 154 has an internal diameter D 154 substantially equal to the outer diameter of the rear projection 124 of the barrel, so as to slide in translation and in rotation directly against the outer wall of said rear projection 124. It also has an edge end end 155 adapted to abut against an annular shoulder 122 formed on the outer surface of the barrel by the rear projection 124.
  • Such abutment positioning is achieved in particular in the maximum output configuration of the eraser, as visible in FIGS. 7a and 7b, which prevents axial displacement of the sleeve 150 towards the barrel 120.
  • the front portion 150B of the sleeve further has a rear projection 158 not surrounding the rut and having an outer surface 159 defining a cylinder whose diameter D 159 is substantially equal to the diameter D 152 of a front opening of the rear portion 150A of the sleeve. This makes it possible to friction fit the rear projection 158 in the rear portion 150A.
  • the rear projection 158 has an inner guide surface 153 adjacent to the outer guide surface 133 of the eraser support 130, the diameter D 153 of the inner guide surface 153 being substantially equal to the diameter D 133 of the outer guide surface 133
  • This inner guide surface 153 has two edges constituting two cam paths 152B1, 152B2 substantially helical and symmetrical to each other with respect to a longitudinal axis, between which are formed two diametrically opposite slots 157B1, 157B2, as can also be seen in the view. perspective of Figure 12.
  • each slot 157B1, 157B2 is greater than or equal to the diameter of each lug 132 of the rubber holder 130, so that the front portion 150B of the sleeve can be engaged around the rubber holder by the rear of the latter by passing each lug through a slot.
  • the outer radius of the protuberance 131 of the eraser support 130 is less than or equal to the inner diameter D 154 of the front portion 154, to allow the front portion 150B to engage around the eraser support. This engagement is completed when the protuberance 131 abuts against an annular shoulder inside the front portion 150B at the junction between the front portion 154 and the rear projection 158. It is understood that the width of the protuberance 131 may be greater than that each slot 157B1, 157B2, since it is not necessary that the protuberance 131 can pass through one of these slots.
  • the rear portion 150A of the sleeve has an inner guide surface 153 of the same diameter D 153 as that of the inner surface for guiding the rear projection 158 of the front portion 150B of the sleeve.
  • This inner guiding surface 153 is adjacent to the outer guiding surface 133 of the rubber support 130, and as for the front portion 150B, has two edges constituting two cam paths 152Al and 152A2 substantially helical and symmetrical to each other with respect to a longitudinal axis.
  • Each cam path 152A1, 152A2 extends angularly less than 180 ° between a first angular positioning member 157A1 and a second angularly opposed positioning member 157A2.
  • each angular positioning member 157Al, 157A2 consists of a projection formed in front of the inner guide surface 153 of said rear portion 150A and which has an end in the form of a rib whose width is substantially equal to the width of a slot 157B1, 157B2.
  • each angular positioning member 157Al, 157A2 is adapted to engage in a corresponding slot 157Bl, 157B2.
  • the engagement of the angular positioning members of the rear portion in the corresponding slots of the front portion makes it possible to firmly prevent any relative rotation between the front portion and the rear portion.
  • the respective cam paths of the two parts of the sleeve are shaped such that two grooves 152 substantially helical and symmetrical with each other with respect to a longitudinal axis are created, each groove being delimited by two cam paths vis-à-vis longitudinally once the two parts of the sleeve are assembled.
  • Each lug 132 constituting a second guide member of the rubber support 130 is engaged in a groove 152 constituting a second complementary guide member. In this way, the rotation of the sleeve 150 causes a translation movement of the sleeve relative to the rubber support.
  • the guide in translation of the sleeve is provided thanks firstly to the sliding of the front portion 154 of the sleeve around the rear projection 124 of the barrel and secondly to the sliding of the inner guide surface 153 of the sleeve around the surface external guide 133 of the eraser support. Note that the rear end 125 of the barrel still remains surrounded by the front portion 154 of the sleeve. It is not necessary for the invention that the protective sleeve is made in two parts.
  • a one-piece protective sleeve having an inner wall which comprises at least one groove constituting a said second complementary guiding member, the engagement in the groove of at least one said second guiding member of the rubber support such that a lug being made by elastic deformation of said inner wall and / or said second guide member.
  • each second guide member may be provided as an extension of the first longitudinal guiding member of the rubber support in the radial direction.
  • modifications to be made to the previously described embodiment (FIGS. 4 and 5) to arrive at this other embodiment would consist in particular in providing that the rear projection 124 of the barrel 120 is interposed radially between the external guiding surface 133 of the gum carrier and the inner guide surface 153 of the sleeve, by extending said rear projection 124 and increasing the diameter D1 53 of said inner guide surface.
  • the sleeve 150 can be moved to a first position for which the eraser 140 is in the retraction configuration.
  • a first longitudinal spacing is provided between the leading end edge 155 of the sleeve and the annular shoulder 122 of the barrel, and a second Longitudinal spacing is provided between the protrusion 131 of the eraser holder 130 and the forward end of the longitudinal slot 121 of the barrel wherein the protuberance 131 is slidable to actuate the advance mechanism of the write cartridge.
  • the rear portion 150A of the sleeve has an annular shoulder 156 of relatively small radial thickness, directed inwards at the opening for the passage of the rubber 140 and flush with the surface of the rubber.
  • the rubber support 130 has at the rear a tabular projection 136 of radial thickness substantially equal to that of the annular shoulder 156 and adapted to hold a portion of the gum 140 enclosed.
  • a third longitudinal spacing is provided between the tabular projection. 136 and the annular shoulder 156, greater than or equal to the first longitudinal spacing so as not to prevent abutment of the front end edge 155 of the sleeve against the annular shoulder 122 of the barrel in the maximum output configuration of the eraser as shown in Figure 7a.
  • a pressure exerted on the rubber 140 or on the sleeve 150 in the direction of the barrel 120 causes the translational sliding of the rubber support 130 and consequently the actuation of the advance mechanism of the writing cartridge.
  • the stroke of this translation is limited by the abutment of the front end edge 155 of the sleeve against the annular shoulder 122 of the barrel or by the abutment of the protuberance 131 against the front end of the slot 121 of the barrel .
  • the rubber support 130 slides directly against the inner wall of the rear projection 124 of the drum, which has the advantage of reinforcing the keeping in axial alignment of the rubber support with the drum and consequently to limit the differences in alignment of the support caused by the transverse forces exerted on the eraser in use.
  • the sleeve 150 can be moved to a second position for which the eraser 140 is in the maximum output configuration.
  • This second position is obtained from the first position by a rotation of the sleeve 150 about its longitudinal axis in the direction of the arrow shown in Figure 6b.
  • the sleeve 150 and the clip have been rotated more than 90.degree.
  • the position of which was marked by the virtual line L in the alignment of the slot 121 remaining unchanged.
  • the maximum output configuration of the eraser 140 therefore corresponds to a position of the sleeve providing locking of the advance of the writing cartridge, which has the particular advantage of allowing the user to use the eraser by holding the writing instrument entirely or at least in part by the 120 without risk of causing an unwanted advance of the cartridge.
  • the protective sleeve may be proportionally shorter compared to the was in comparison with the embodiment relating to Figures la and Ib.
  • Such a locking allows a return spring having a relatively low stiffness is provided for the write cartridge so that the actuation of the cartridge advance mechanism requires less effort to the user, which also allows to reduce the weight and cost of the return spring.
  • the writing instrument according to the invention described in the preceding embodiments is of the type pencil, but it is understood that the invention is not limited to the use of a writing cartridge to mines.
  • the invention can indeed be applied to a writing instrument comprising an erasable ink cartridge with an eraser.
  • the writing cartridge comprises a reservoir tube that can be actuated to slide in a drum.
  • the writing cartridge can be provided integral with a fixed writing tip.

Landscapes

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

Abstract

The invention relates to a writing instrument that comprises a shaft and an eraser exit device (40), wherein said device includes: an eraser protection sleeve (50) mobile at least in rotation relative to the shaft so that the eraser can assume a maximum exit configuration and a retraction configuration; and an eraser holder (30) provided with at least a first longitudinal guiding member directly interacting with a first complementary guiding member connected to the shaft so as to prevent any rotation movement between the holder and the shaft, and provided with at least a second guiding member (32) interacting with a second complementary guiding member (52) connected to the sleeve. The sleeve has a front portion (54) surrounding the rear end of the shaft and a rear portion having an inner guiding portion (53) including the second complementary guiding member (52), the eraser holder being capable of sliding directly against the inner wall of the shaft and having an outer guiding surface (33) including the second guiding member (32).

Description

Instrument d'écriture muni d'une gomme protégée par un manchon Writing instrument with an eraser protected by a sleeve
La présente invention se rapporte de manière générale à un instrument d'écriture comprenant un fût s'étendant longitudinalement entre une extrémité avant munie d'une pointe d'écriture et une extrémité arrière, comprenant en outre un dispositif de sortie de gomme qui comporte : - une gomme pouvant prendre une configuration de sortie maximale et une configuration de rétractation dans laquelle elle est au moins en partie protégée ; un manchon de protection de la gomme présentant une surface interne généralement cylindrique, mobile par rapport au fut entre une première position pour laquelle la gomme est en configuration de rétractation et une deuxième position pour laquelle la gomme est en configuration de sortie maximale; un support de gomme auquel est fixée la gomme, des moyens pour permettre un mouvement de translation relative entre le support de gomme et le manchon dans la direction longitudinale.The present invention generally relates to a writing instrument comprising a barrel extending longitudinally between a front end provided with a writing tip and a rear end, further comprising a gum output device which comprises: an eraser able to assume a maximum output configuration and a retraction configuration in which it is at least partly protected; a gum protection sleeve having a generally cylindrical inner surface movable with respect to the gum is between a first position for which the gum is in the retraction configuration and a second position for which the gum is in the maximum output configuration; an eraser holder to which the eraser is attached, means for permitting relative translation movement between the eraser holder and the sleeve in the longitudinal direction.
Une première catégorie d'instruments d'écriture de ce type concerne les dispositifs dans lesquels le support de gomme est mobile en translation et interdit de rotation par rapport au fût, et le manchon de protection est mobile en rotation par rapport au fût tout en étant interdit de translation sauf éventuellement pour l'actionnement d'un mécanisme d'avance d'une cartouche d'écriture. Les moyens pour interdire la rotation du support de gomme par rapport au fût comprennent classiquement au moins un premier organe de guidage longitudinal tel qu'une rainure ou une nervure prévue sur le support et coopérant directement avec un premier organe de guidage longitudinal complémentaire prévu sur une pièce interdite de rotation par rapport au fût. Les moyens pour permettre un mouvement de translation relative entre le support de gomme et le manchon comprennent classiquement au moins un deuxième organe de guidage tel qu'une rainure hélicoïdale ou un ergot prévu sur le support et coopérant avec un deuxième organe de guidage complémentaire solidaire du manchon.A first category of writing instruments of this type relates to devices in which the rubber support is movable in translation and prohibited from rotation relative to the barrel, and the protective sleeve is rotatable relative to the barrel while being forbidden translation except possibly for the actuation of a mechanism for advancing a writing cartridge. The means for prohibiting the rotation of the rubber support relative to the barrel conventionally comprise at least one first longitudinal guiding member such as a groove or a rib provided on the support and cooperating directly with a first complementary longitudinal guiding member provided on a prohibited part of rotation relative to the drum. The means for allowing a relative translation movement between the rubber support and the sleeve conventionally comprise at least one second guide member such as a helical groove or a lug provided on the support and cooperating with a second complementary guiding member integral with the muff.
Un exemple d'instrument d'écriture dans cette première catégorie est décrit par la publication du brevet américain US5683191, qui se rapporte à un porte- mine dont l'avance de mine est actionnée par une poussée de l'utilisateur sur le manchon de protection pour déplacer celui-ci en translation avec le tube réservoir de mines. Dans un premier mode de réalisation, le support de gomme présente à l'avant une projection tubulaire de section polygonale emmanchée par coulissement avec contact autour d'une portion arrière du tube réservoir de mines qui présente une section de forme complémentaire. Le déplacement en translation du support de gomme est ainsi guidé avec empêchement de rotation par rapport au tube réservoir de mines. Le support de gomme est entouré sur toute sa longueur par le manchon de protection qui comprend une projection tubulaire pouvant coulisser contre la paroi intérieure du fût . Ce dispositif présente toutefois certains inconvénients, notamment du fait que deux éléments tubulaires sont disposés radialement entre le tube réservoir de mines et le fût, ce qui laisse un faible espace diamétral central et pénalise la contenance du réservoir de mines.. De plus, des jeux radiaux sont nécessaires entre les éléments tubulaires à l'intérieur du fût pour que ceux-ci puissent coulisser les uns contre les autres, et la multiplicité de ces jeux compromet le maintien en alignement axial du support de gomme avec le fût. Une deuxième catégorie concerne les dispositifs dans lesquels le support de gomme est interdit de translation par rapport au fût, sauf éventuellement pour l'actionnement d'un mécanisme d'avance d'une cartouche d'écriture, et le manchon de protection est mobile au moins en translation par rapport au fût. Pour un dispositif de type porte-mine, le support de gomme est généralement relié solidairement à l'extrémité arrière d'un tube réservoir de mines déplaçable en translation dans le fût uniquement pour l'avance de mine. Le support de gomme reste donc immobile dans le fût lorsque le manchon de protection est déplacé entre la configuration de rétractation et la configuration de sortie maximale de la gomme.An example of writing instrument in this first category is described by the publication of US Patent US5683191, which relates to a mechanical pencil whose lead is driven by a push of the user on the protective sleeve to move the latter in translation with the reservoir tube mines. In a first embodiment, the rubber support has at the front a tubular projection of polygonal section slidably fitted with contact around a rear portion of the mine reservoir tube which has a section of complementary shape. The translational movement of the rubber support is thus guided with prevention of rotation relative to the mine reservoir tube. The rubber support is surrounded throughout its length by the protective sleeve which comprises a tubular projection slidable against the inner wall of the barrel. This device however has certain disadvantages, in particular because two tubular elements are arranged radially between the mine reservoir tube and the barrel, which leaves a small central diametral space and penalizes the capacity of the mine reservoir. Radials are required between the tubular members within the barrel so that they can slide against each other, and the multiplicity of these sets compromises the maintenance in axial alignment of the rubber holder with the barrel. A second category concerns devices in which the rubber support is prohibited from translation relative to the barrel, except possibly for the actuation of a mechanism for advancing a writing cartridge, and the protective sleeve is movable at less in translation with respect to the barrel. For a pencil-type device, the rubber support is generally integrally connected to the rear end of a mine reservoir tube movable in translation in the barrel only for mine advance. The eraser support therefore remains stationary in the barrel when the protective sleeve is moved between the retraction configuration and the maximum output configuration of the eraser.
Un exemple d'instrument d'écriture dans cette deuxième catégorie est décrit par le modèle d'utilité japonais enregistré JP2558803Y2, qui se rapporte à un porte-mine dont l'avance de mine est actionnée par une poussée de l'utilisateur sur le manchon de protection pour déplacer celui-ci en translation avec le tube réservoir de mines. Le manchon présente une portion avant entourant l'extrémité arrière du fût.An example of a writing instrument in this second category is described by the registered Japanese utility model JP2558803Y2, which relates to a mechanical pencil whose lead advance is actuated by a push of the user on the sleeve protection to move the latter in translation with the mine reservoir tube. The sleeve has a front portion surrounding the rear end of the barrel.
Le support de gomme est relié solidairement à l'extrémité arrière du tube réservoir par un tube intermédiaire comportant des reliefs coopérant avec des moyens de verrouillage prévus sur le manchon pour immobiliser le manchon dans l'une ou l'autre des configurations de rétractation ou de sortie maximale de la gomme. Ce dispositif présente toutefois certains inconvénients, en particulier du fait que les moyens de verrouillage sont relativement difficiles à fabriquer et risquent d'autre part d'être déverrouillés accidentellement par l'utilisateur pendant un gommage. En outre, le dispositif ne comporte pas de système de verrouillage de l'avance de mine, ce qui a pour conséquence que l'utilisation de la gomme en tenant l'instrument d'écriture par le fût risque de provoquer l'avancement du support de gomme vers le fût et donc une avance de mine non souhaitée.The rubber support is integrally connected to the rear end of the reservoir tube by an intermediate tube comprising reliefs cooperating with locking means provided on the sleeve to immobilize the sleeve in one or the other configuration of retraction or maximum output of the eraser. This However, the device has certain disadvantages, in particular because the locking means are relatively difficult to manufacture and may also be accidentally unlocked by the user during a scrubbing. In addition, the device does not include a locking system of the lead advance, which has the consequence that the use of the eraser by holding the writing instrument by the barrel may cause the advancement of the support of gum towards the barrel and thus an undesired lead advance.
La présente invention vise à proposer une solution alternative à ces dispositifs de sortie de gomme antérieurs, qui permet notamment de simplifier la réalisation des dispositifs de sortie de gomme aussi bien dans la première que dans la deuxième catégorie susmentionnée.The present invention aims at providing an alternative solution to these prior gum output devices, which in particular makes it possible to simplify the production of the gum output devices both in the first and in the second category mentioned above.
A cet effet, l'invention a pour objet un instrument d'écriture tel que défini de manière générale dans ce qui précède, comprenant en outre les caractéristiques suivantes : - la mobilité du manchon de protection par rapport au fût s'effectue au moins en rotation ;For this purpose, the subject of the invention is a writing instrument as defined in a general manner in the foregoing, further comprising the following characteristics: the mobility of the protective sleeve with respect to the drum is effected at least in rotation;
- le support de gomme est muni d'au moins un premier organe de guidage longitudinal coopérant directement avec un premier organe de guidage longitudinal complémentaire solidaire du fût pour interdire tout mouvement de rotation entre le support et le fût, et est muni d'au moins un deuxième organe de guidage coopérant avec un deuxième organe de guidage complémentaire solidaire du manchon de manière à ce que la rotation du manchon entraine le mouvement de translation relative entre le support et le manchon dans la direction longitudinale ;the rubber support is provided with at least one first longitudinal guiding member cooperating directly with a first complementary longitudinal guiding member integral with the barrel to prevent any rotational movement between the support and the barrel, and is provided with at least one a second guiding member cooperating with a second complementary guiding member secured to the sleeve so that the rotation of the sleeve causes the relative translation movement between the support and the sleeve in the longitudinal direction;
- le manchon présente une portion avant entourant l'extrémité arrière du fût et une portion arrière n'entourant pas le fût qui présente une surface interne de guidage comportant le deuxième organe de guidage complémentaire ; et- The sleeve has a front portion surrounding the rear end of the barrel and a rear portion not surrounding the barrel which has an inner guide surface having the second complementary guide member; and
- le support de gomme est apte à coulisser directement contre la paroi interne du fût et présente une surface externe de guidage comportant le deuxième organe de guidage. Grâce à ces dispositions, il est obtenu un dispositif de sortie de gomme relativement simple et répondant aux contraintes particulières des instruments d'écriture de ce type. Notamment, l'aptitude du support de gomme à coulisser directement contre la paroi interne du Ht présente un avantage pour renforcer le maintien en alignement axial du support de gomme avec le fût, ce qui permet de limiter les écarts d'alignement du support causés par les efforts transversaux exercés sur la gomme en utilisation. En outre, le fait que le manchon de protection présente une portion avant entourant l'extrémité arrière du fût permet non seulement d'optimiser le diamètre de la gomme mais aussi de renforcer le maintien en alignement axial du manchon avec le fût. Ces dispositions participent à la rigidité du dispositif de sortie de gomme dans la direction transversale et améliorent ainsi le confort d'utilisation, permettant que l'utilisateur ne ressente pas de jeu dans le mécanisme de ce dispositif en particulier si l'instrument d'écriture est tenu au moins en partie par le fût pour utiliser la gomme.- The rubber support is able to slide directly against the inner wall of the barrel and has an outer guide surface having the second guide member. With these provisions, it is obtained a relatively simple gum output device and responding to the particular constraints of writing instruments of this type. In particular, the aptitude of the sliding rubber support directly against the inner wall of the Ht has an advantage to enhance the maintenance in axial alignment of the rubber holder with the barrel, which limits the alignment of the support gaps caused by the transverse forces exerted on the rubber in use. In addition, the fact that the protective sleeve has a front portion surrounding the rear end of the barrel not only optimizes the diameter of the rubber but also strengthen the axial alignment of the sleeve with the barrel. These provisions contribute to the rigidity of the rubber output device in the transverse direction and thus improve the comfort of use, allowing the user does not feel play in the mechanism of this device especially if the writing instrument is held at least partly by the drum to use the eraser.
Selon un mode de réalisation avantageux, le fût comporte des moyens de butée aptes à coopérer avec un bord d'extrémité avant du manchon pour empêcher un déplacement axial du manchon vers le fût au moins dans la configuration de sortie maximale de la gomme. Grâce à ces dispositions, si l'instrument d'écriture est tenu au moins en partie par le fût pour utiliser la gomme, la pression exercée sur la gomme peut être relativement forte sans risquer de provoquer un coulissement en translation du support de gomme conjointement avec le manchon vers le fût. Ceci présente un avantage particulier dans le cas d'un instrument d'écriture dont l'avance d'une cartouche d'écriture est actionnée par une poussée sur le manchon de protection pour déplacer en translation un tube réservoir de la cartouche, puisque un verrouillage de l'avance de la cartouche d'écriture est réalisé dans la configuration de sortie maximale de la gomme.According to an advantageous embodiment, the barrel comprises stop means capable of cooperating with a front end edge of the sleeve to prevent axial displacement of the sleeve towards the barrel at least in the maximum output configuration of the rubber. Thanks to these arrangements, if the writing instrument is held at least partly by the drum to use the rubber, the pressure exerted on the rubber can be relatively high without the risk of causing a translational sliding of the rubber support together with the sleeve towards the drum. This has a particular advantage in the case of a writing instrument whose advance of a writing cartridge is actuated by a thrust on the protective sleeve to move in translation a reservoir tube of the cartridge, since a locking the writing cartridge is advanced in the maximum output configuration of the eraser.
Dans d'autres modes de réalisation préférés d'un instrument d'écriture selon l'invention, on a recours notamment à l'une ou l'autre des dispositions suivantes :In other preferred embodiments of a writing instrument according to the invention, use is made in particular of one or other of the following provisions:
- la surface externe de guidage du support de gomme est adjacente à la surface interne de guidage du manchon, et ledit au moins un deuxième organe de guidage est radialement saillant vers l'extérieur et est axialement décalé vers l'arrière du support de gomme par rapport audit au moins un premier organe de guidage longitudinal ; - ledit deuxième organe de guidage complémentaire est une gorge formée dans ladite surface interne de guidage du manchon ; - le support de gomme présente une projection avant s'étendant longitudinalement et dont la surface extérieure forme au moins approximativement un cylindre ;the outer surface for guiding the rubber support is adjacent to the inner guide surface of the sleeve, and the at least one second guide member is radially projecting outwards and is axially offset towards the rear of the rubber support by report to said at least one first longitudinal guide member; said second complementary guiding member is a groove formed in said inner surface for guiding the sleeve; the rubber support has a front projection extending longitudinally and whose outer surface forms at least approximately a cylinder;
- la gorge constituant ledit deuxième organe de guidage complémentaire forme un chemin hélicoïdal dans la surface interne de guidage du manchon, et le support de gomme présente deux deuxièmes organes de guidage latéralement opposés engagés dans ladite gorge.- The groove constituting said second complementary guide member forms a helical path in the inner surface of the guide sleeve, and the rubber holder has two second laterally opposite guide members engaged in said groove.
Dans d'autres modes de réalisation préférés se rapportant à la première catégorie définie précédemment pour laquelle le manchon de protection est généralement interdit de translation par rapport au fût et le support de gomme est mobile en translation et interdit de rotation par rapport au fût, on a recours notamment à l'une ou l'autre des dispositions suivantes :In other preferred embodiments relating to the first category defined above for which the protective sleeve is generally prohibited translation relative to the barrel and the rubber support is movable in translation and prohibited from rotation relative to the barrel, resort to one or other of the following provisions:
- le manchon est relié au fût de façon à pouvoir tourner relativement au fût sans possibilité de déplacement en translation, cette disposition étant particulièrement appropriée pour un instrument d'écriture dont l'avance d'une cartouche d'écriture est actionnée par un organe poussoir disposé latéralement sur le fût ;the sleeve is connected to the barrel so as to be rotatable relative to the barrel without the possibility of displacement in translation, this arrangement being particularly suitable for a writing instrument whose advance of a writing cartridge is actuated by a push member disposed laterally on the barrel;
- le fût comprend une portion arrière présentant une paroi extérieure essentiellement cylindrique entourée par la portion avant du manchon et qui comporte au moins deux protubérances disposées selon un cercle périphérique, ladite portion avant présentant une paroi interne comportant une gorge annulaire dans laquelle lesdites protubérances sont engagées ;- The barrel comprises a rear portion having a substantially cylindrical outer wall surrounded by the front portion of the sleeve and which comprises at least two protuberances arranged in a peripheral circle, said front portion having an inner wall having an annular groove in which said protuberances are engaged ;
- ledit au moins un premier organe de guidage longitudinal est formé par un méplat s'étendant longitudinalement sur la surface extérieure de la projection avant du support, et la portion arrière du fût présente une paroi intérieure sur laquelle est formé au moins un méplat constituant un dit premier organe de guidage longitudinal complémentaire ;said at least one first longitudinal guiding member is formed by a flat portion extending longitudinally on the outer surface of the front projection of the support, and the rear portion of the barrel has an inner wall on which is formed at least one flat part constituting a said first complementary longitudinal guide member;
- lesdits moyens de butée aptes à coopérer avec un bord d'extrémité avant du manchon sont formés à l'avant desdites protubérances de la portion arrière du fût par une partie annulaire saillante extérieurement du fût, le bord d'extrémité avant du manchon étant apte à appuyer en butée contre ladite partie annulaire ; - l'instrument d'écriture comporte un mécanisme d'avance d'une cartouche d'écriture, le fût comprend une première pièce essentiellement tabulaire traversée latéralement par un bouton d'actionnement dudit mécanisme d'avance et comprend de plus une seconde pièce essentiellement tabulaire comportant le premier organe de guidage longitudinal complémentaire et reliée de manière fixe à ladite première pièce.said abutment means capable of cooperating with a front end edge of the sleeve are formed in front of said protuberances of the rear portion of the barrel by an annular portion projecting outwardly from the barrel, the front end edge of the sleeve being suitable pressing abutting against said annular portion; the writing instrument comprises a mechanism for advancing a writing cartridge, the drum comprises a first essentially tabular piece traversed laterally by an actuating button of said feed mechanism and furthermore comprises a second piece essentially tabular comprising the first complementary longitudinal guide member and fixedly connected to said first piece.
Dans d'autres modes de réalisation préférés se rapportant se rapportant à la deuxième catégorie définie précédemment pour laquelle le manchon de protection est mobile au moins en translation par rapport au fut et le support de gomme est généralement interdit de translation par rapport au fut, on a recours notamment à l'une ou l'autre des dispositions suivantes :In other preferred embodiments relating to the second category defined above for which the protective sleeve is movable at least in translation relative to the fut and the gum carrier is generally prohibited translation relative to the fut, one resort to one or other of the following provisions:
- l'instrument d'écriture comporte un mécanisme d'avance d'une cartouche d'écriture, le support de gomme est relié solidairement à un tube réservoir dudit mécanisme d'avance disposé à l'intérieur du fût de manière coaxiale avec ledit support et apte à coulisser en translation avec ledit support pour actionner ledit mécanisme d'avance ;the writing instrument comprises a mechanism for advancing a writing cartridge, the eraser support is integrally connected to a reservoir tube of said advance mechanism disposed inside the barrel coaxially with said support; and able to slide in translation with said support to actuate said feed mechanism;
- la projection avant du support de gomme ainsi que la surface externe de guidage dudit support sont essentiellement cylindriques, et le diamètre extérieur de ladite surface externe de guidage est supérieur au diamètre extérieur de ladite projection avant en étant sensiblement égal au diamètre de la paroi interne du fût :the front projection of the rubber support and the outer surface for guiding said support are substantially cylindrical, and the outer diameter of said outer guide surface is greater than the outer diameter of said projection before being substantially equal to the diameter of the inner wall; of the drum:
- ledit au moins un premier organe de guidage longitudinal est formé par une protubérance saillante extérieurement sur ladite surface externe de guidage du support de gomme, et un dit premier organe de guidage longitudinal complémentaire est formé par une fente longitudinale formée dans le fût, ladite fente débouchant sur l'extrémité arrière du fût et étant adaptée pour permettre un coulissement en translation de ladite protubérance sans possibilité de rotation ;said at least one first longitudinal guiding member is formed by a protrusion protruding outwardly on said outer surface for guiding the eraser holder, and a said first complementary longitudinal guiding member is formed by a longitudinal slot formed in the barrel, said slot opening onto the rear end of the barrel and being adapted to allow translational sliding of said protuberance without the possibility of rotation;
- le fût présente une paroi extérieure essentiellement cylindrique et comprend une projection arrière dont le diamètre extérieur est inférieur au diamètre extérieur du fût, de façon à ce que la surface extérieure du fût forme un épaulement annulaire constituant lesdits moyens de butée aptes à coopérer avec un bord d'extrémité avant du manchon, la portion avant du manchon présentant un diamètre intérieur sensiblement égal au diamètre extérieur de ladite projection arrière ;- The barrel has a substantially cylindrical outer wall and comprises a rear projection whose outside diameter is smaller than the outside diameter of the barrel, so that the outer surface of the barrel forms an annular shoulder constituting said stop means adapted to cooperate with a front end edge of the sleeve, the front portion of the sleeve having a diameter interior substantially equal to the outer diameter of said rear projection;
- le manchon est formé par l'assemblage de deux parties respectivement avant et arrière présentant des surfaces internes de guidage de même diamètre, chaque surface interne de guidage étant adjacente à la surface externe de guidage du support de gomme et présentant au moins un bord constituant un chemin de came, les chemins de came respectifs des deux parties du manchon étant conformés de telle sorte qu'une gorge est créée délimitée par deux chemins de came en vis-à-vis longitudinalement une fois les deux parties assemblées, chaque gorge constituant un dit deuxième organe de guidage complémentaire ; - la partie arrière du manchon présente une ouverture avant essentiellement circulaire d'un certain diamètre et la partie avant du manchon présente une projection arrière comportant au moins un dit chemin de came, ladite projection arrière présentant une surface extérieure définissant un cylindre dont le diamètre est sensiblement égal au diamètre de l'ouverture avant de la partie arrière du manchon, pour permettre un emmanchement avec friction de ladite projection arrière dans la partie arrière du manchon ;the sleeve is formed by the assembly of two parts, respectively front and rear, having internal guiding surfaces of the same diameter, each inner guiding surface being adjacent to the external guiding surface of the rubber support and having at least one edge constituting a cam path, the respective cam paths of the two parts of the sleeve being shaped such that a groove is created delimited by two cam paths vis-à-vis longitudinally once the two parts assembled, each groove constituting a said second complementary guiding member; the rear portion of the sleeve has a substantially circular front opening of a certain diameter and the front portion of the sleeve has a rear projection comprising at least one said cam path, said rear projection having an outer surface defining a cylinder whose diameter is substantially equal to the diameter of the front opening of the rear portion of the sleeve, to allow a friction fit of said rear projection in the rear portion of the sleeve;
- la partie arrière du manchon comporte deux chemins de came sensiblement hélicoïdaux et symétriques entre eux par rapport à un axe longitudinal, chaque chemin de came s 'étendant angulairement entre un premier élément de positionnement angulaire et un second élément de positionnement angulaire diamétralement opposés et formés par des projections à l'avant de la surface interne de guidage de ladite partie arrière du manchon, et la partie avant du manchon comporte deux chemins de came sensiblement hélicoïdaux et symétriques entre eux par rapport à un axe longitudinal entre lesquels sont ménagées deux fentes diamétralement opposées destinées à recevoir lesdits premier et second éléments de positionnement angulaire ;the rear portion of the sleeve comprises two substantially helical and symmetrical cam paths relative to one another with respect to a longitudinal axis, each cam path extending angularly between a first angular positioning element and a second angular positioning element that are diametrically opposed and formed; by projections to the front of the inner guiding surface of said rear portion of the sleeve, and the front portion of the sleeve comprises two substantially helical and symmetrical cam paths with respect to a longitudinal axis between which are formed two diametrically spaced slots opposing means for receiving said first and second angular positioning members;
- le support de gomme est réalisé en une seule pièce tubulaire avec le tube réservoir de la cartouche d'écriture.the rubber support is made in a single tubular part with the reservoir tube of the writing cartridge.
D'autres caractéristiques et avantages ressortent de la description qui va suivre d'exemples non limitatifs de modes de réalisation, en référence aux figures dans lesquelles : La figure la représente schématiquement une vue en perspective d'un instrument d'écriture selon l'invention, dans lequel le manchon de protection est interdit de translation et est mobile en rotation par rapport au fut.Other features and advantages are apparent from the following description of non-limiting examples of embodiments, with reference to the figures in which: Figure la shows schematically a perspective view of a writing instrument according to the invention, wherein the protective sleeve is prohibited translation and is rotatable relative to the fut.
La figure Ib représente schématiquement une vue en perspective éclatée de l'instrument d'écriture de la figure la.Figure Ib schematically shows an exploded perspective view of the writing instrument of Figure la.
La figure 2a représente schématiquement une vue partielle en coupe longitudinale de l'instrument d'écriture de la figure la, dans une première position de rotation du manchon pour laquelle la gomme est en configuration de rétractation.Figure 2a schematically shows a partial view in longitudinal section of the writing instrument of Figure la, in a first rotational position of the sleeve for which the rubber is in the retraction configuration.
La figure 2b représente schématiquement une vue en coupe transversale de l'instrument d'écriture de la figure 2a selon le plan I-I.Figure 2b schematically shows a cross-sectional view of the writing instrument of Figure 2a in the plane I-I.
La figure 3 représente schématiquement une vue partielle en coupe longitudinale de l'instrument d'écriture de la figure la, dans une deuxième position de rotation du manchon pour laquelle la gomme est en configuration de sortie maximale. La figure 4 représente schématiquement une vue partielle éclatée en coupe longitudinale d'un instrument d'écriture selon l'invention, dans lequel le manchon de protection est mobile en translation et en rotation par rapport au fut.3 schematically shows a partial view in longitudinal section of the writing instrument of Figure la, in a second rotational position of the sleeve for which the eraser is in the maximum output configuration. FIG. 4 schematically represents an exploded partial view in longitudinal section of a writing instrument according to the invention, in which the protective sleeve is movable in translation and in rotation with respect to the drum.
La figure 5 représente schématiquement une vue partielle en perspective éclatée de l'instrument d'écriture représenté sur la figure 4. La figure 6a représente schématiquement une vue partielle en coupe longitudinale de l'instrument d'écriture représenté sur la figure 4, dans une première position du manchon pour laquelle la gomme est en configuration de rétractation.FIG. 5 schematically represents a partial exploded perspective view of the writing instrument shown in FIG. 4. FIG. 6a schematically represents a partial view in longitudinal section of the writing instrument represented in FIG. first position of the sleeve for which the rubber is in the retraction configuration.
La figure 6b représente schématiquement une vue partielle en perspective de l'instrument d'écriture représenté sur la figure 6a. La figure 7a représente schématiquement une vue partielle en coupe longitudinale de l'instrument d'écriture représenté sur la figure 4, dans une deuxième position du manchon pour laquelle la gomme est en configuration de sortie maximale.Figure 6b schematically shows a partial perspective view of the writing instrument shown in Figure 6a. Figure 7a schematically shows a partial view in longitudinal section of the writing instrument shown in Figure 4, in a second position of the sleeve for which the eraser is in the maximum output configuration.
La figure 7b représente schématiquement une vue partielle en perspective de l'instrument d'écriture représenté sur la figure 7a.Figure 7b schematically shows a partial perspective view of the writing instrument shown in Figure 7a.
La figure 8 représente schématiquement une vue en perspective d'une pièce du fût de l'instrument d'écriture de la figure la. La figure 9 représente schématiquement une vue partielle en perspective du support de gomme de l'instrument d'écriture de la figure la.Figure 8 schematically shows a perspective view of a part of the barrel of the writing instrument of Figure la. Figure 9 schematically shows a partial perspective view of the eraser holder of the writing instrument of Figure la.
La figure 10 représente schématiquement une vue en perspective arrachée du manchon de protection de l'instrument d'écriture de la figure la. La figure 11 représente schématiquement une vue en perspective de la partie arrière du manchon de protection de l'instrument d'écriture de la figure 4.Figure 10 schematically shows a broken perspective view of the protective sleeve of the writing instrument of Figure la. FIG. 11 schematically represents a perspective view of the rear part of the protective sleeve of the writing instrument of FIG. 4.
La figure 12 représente schématiquement une vue en perspective de la partie avant du manchon de protection de l'instrument d'écriture de la figure 4.FIG. 12 schematically represents a perspective view of the front portion of the protective sleeve of the writing instrument of FIG. 4.
Sur les figures la et Ib, un instrument d'écriture selon l'invention, représenté en perspective, comporte un manchon de protection 50 interdit de translation et mobile en rotation par rapport au fut. Comme il est d'usage général dans le domaine des instruments d'écriture, le terme « fût » désigne un organe extérieur de l'instrument comportant une partie pour la prise en main, cet organe pouvant être constitué de plusieurs éléments assemblés solidairement. Le manchon 50 présente une surface interne généralement cylindrique, et présente à son extrémité axiale arrière une ouverture 4 pour le passage d'une gomme 40 fixée sur un support 30. Dans le mode de réalisation représenté, un clip 59 est formé intégralement avec le manchon de protection 50. Deux bras opposés radialement flexibles 36 sont prévus sur le support de gomme 30 pour fixer l'extrémité avant de la gomme 40. La surface externe de ces bras flexibles fait partie d'une surface externe de guidage 33 du support, sur laquelle deux ergots 32 latéralement opposés font saillie. Le support de gomme 30 présente une projection avant 35 s 'étendant longitudinalement et dont la surface extérieure forme approximativement un cylindre, deux méplats 31 latéralement opposés et s 'étendant longitudinalement étant formés le long de cette projection 35.In FIGS. 1a and 1b, a writing instrument according to the invention, shown in perspective, comprises a protective sleeve 50 which is prevented from translating and mobile in rotation with respect to the drum. As it is of general use in the field of writing instruments, the term "barrel" designates an external body of the instrument comprising a portion for the grip, this member may consist of several elements assembled together. The sleeve 50 has a generally cylindrical inner surface, and has at its rear axial end an opening 4 for the passage of a rubber 40 fixed on a support 30. In the embodiment shown, a clip 59 is formed integrally with the sleeve 50. Two radially flexible opposite arms 36 are provided on the rubber support 30 for fixing the front end of the rubber 40. The outer surface of these flexible arms is part of an outer guide surface 33 of the support, on which two lugs 32 laterally opposed project. The gum carrier 30 has a longitudinally extending forward projection whose outer surface forms approximately one cylinder, two laterally extending longitudinally extending flats 31 formed along the projection 35.
Le fût comprend un premier élément 12 essentiellement tubulaire monté dans une partie avant 1 de l'instrument d'écriture qui comporte une pointe d'écriture 2 et une cartouche d'écriture (non représentée) avec un tube réservoir de mines 10, et comprend de plus un second élément 20 essentiellement tubulaire emmanché fermement sur le premier élément 12. Le premier élément 12 du fût est entouré par un manchon de préhension 13, et est traversé latéralement par un bouton 14 d'un mécanisme d'avance de la cartouche d'écriture connu en soi. Il est entendu que les deux éléments 12 et 20 du fut pourraient alternativement être réalisés en une seule pièce. Dans ce qui suit, par souci de simplification, le second élément 20 est appelé le fut.The barrel comprises a first substantially tubular element 12 mounted in a front portion 1 of the writing instrument which has a writing tip 2 and a writing cartridge (not shown) with a mine reservoir tube 10, and comprises in addition a second substantially tubular element 20 firmly fitted on the first element 12. The first element 12 of the drum is surrounded by a gripping sleeve 13, and is traversed laterally by a button 14 of a feed mechanism of the cartridge. known writing in itself. It is understood that two elements 12 and 20 of the fut could alternatively be made in one piece. In what follows, for the sake of simplification, the second element 20 is called the was.
Comme représenté par ailleurs sur la vue en perspective de la figure 8, le fut 20 comprend une portion avant 23 et une portion arrière 24 présentant toutes deux une paroi extérieure essentiellement cylindrique. Plusieurs protubérances 24A disposées selon un cercle périphérique font saillie sur la paroi extérieure de la portion arrière 24. Cette portion arrière 24 présente de plus une paroi intérieure sur laquelle sont formés deux méplats 21 latéralement opposés. A l'avant du cercle périphérique des protubérances 24A, des moyens de butée 22 délimitant la portion arrière 24 par rapport à la portion avant 23 sont formés par une partie annulaire saillante extérieurement du fût 20.As otherwise shown in the perspective view of Fig. 8, the barrel 20 includes a front portion 23 and a rear portion 24 both having a substantially cylindrical outer wall. Several protuberances 24A disposed in a peripheral circle project from the outer wall of the rear portion 24. This rear portion 24 further has an inner wall on which are formed two flats 21 laterally opposite. At the front of the peripheral circle of the protuberances 24A, abutment means 22 delimiting the rear portion 24 with respect to the front portion 23 are formed by an annular portion protruding outwardly from the barrel 20.
Sur les figures 2a et 3, il apparait que le manchon 50 comprend une portion avant 54 entourant la portion arrière 24 du fût et apte à coulisser en rotation directement contre la paroi extérieure de ladite portion arrière. Cette portion avant 54 présente une paroi interne comportant une gorge annulaire 54A dans laquelle les protubérances 24A du fut sont engagées. Le bord d'extrémité avant 55 du manchon 50 est positionné sensiblement en butée contre la partie annulaire 22 du manchon 20. De la sorte, même dans le cas d'une pression particulièrement forte exercée sur la gomme alors que l'utilisateur tient l'instrument par le fût, le manchon reste en position par rapport au fût.In Figures 2a and 3, it appears that the sleeve 50 comprises a front portion 54 surrounding the rear portion 24 of the barrel and adapted to slide in rotation directly against the outer wall of said rear portion. This front portion 54 has an inner wall having an annular groove 54A in which the protuberances 24A of the are engaged. The front end edge 55 of the sleeve 50 is positioned substantially in abutment against the annular portion 22 of the sleeve 20. In this way, even in the case of a particularly strong pressure exerted on the eraser while the user holds it. instrument by the barrel, the sleeve remains in position relative to the barrel.
Comme représenté par ailleurs sur la vue en perspective de la figure 10, le manchon comprend en outre une portion arrière 51 qui présente une surface interne de guidage 53 adjacente à la surface externe de guidage 33 du support de gomme. Une gorge 52 de forme généralement hélicoïdale, réalisant un chemin de guidage pour les ergots 32 du support de gomme 30, est formée sur la surface interne de guidage 53. La coopération des ergots 32 avec la gorge 52 permet que la rotation du manchon 50 entraîne le déplacement du support de gomme 30 relativement au manchon. La projection avant 35 du support de gomme 30 présente un alésage 37 sensiblement cylindrique ouvert à son extrémité avant et qui comprend une paroi de fond 38 à son extrémité arrière. Comme représenté par ailleurs sur la vue en perspective de la figure 9, cette paroi de fond 38 présente une ouverture centrale 39 adaptée pour permettre le rechargement de mines 3. Le tube réservoir de mines 10 est disposé intérieurement au fïït 20 et au support de gomme 30, de manière coaxiale avec ceux-ci, et présente une extrémité arrière engagée dans l'alésage 37 du support. Ce tube réservoir 10 est conformé pour occuper l'essentiel de la profondeur de l'alésage 37 dans la configuration de rétractation de la gomme 40 représentée sur la Figure 2a.As otherwise shown in the perspective view of Fig. 10, the sleeve further comprises a rear portion 51 which has an inner guide surface 53 adjacent to the outer guide surface 33 of the gum carrier. A groove 52 of generally helical shape, producing a guide path for the lugs 32 of the rubber support 30, is formed on the inner guiding surface 53. The cooperation of the lugs 32 with the groove 52 allows the rotation of the sleeve 50 to cause moving the rubber support 30 relative to the sleeve. The front projection 35 of the gum holder 30 has a substantially cylindrical bore 37 open at its forward end and which includes a bottom wall 38 at its rear end. As shown elsewhere on the view in perspective of Figure 9, this bottom wall 38 has a central opening 39 adapted to allow the reloading of mines 3. The mine reservoir tube 10 is disposed internally to the fïtt 20 and the gum support 30, coaxially with those- ci, and has a rear end engaged in the bore 37 of the support. This reservoir tube 10 is shaped to occupy most of the depth of the bore 37 in the retracting configuration of the eraser 40 shown in Figure 2a.
Le manchon 50 présente un épaulement annulaire 56 dirigé radialement vers l'intérieur au niveau de l'ouverture 4 pour le passage de la gomme 40 et affleurant à la surface de la gomme. Cet épaulement annulaire participe au blocage de la gomme dans la direction radiale, et constitue une butée contre laquelle les bras flexibles 36 du support de gomme 30 viennent en appui dans la configuration de sortie maximale de la gomme comme représenté sur la figure 3, empêchant ainsi ledit support de sortir du manchon. Dans cette configuration, l'extrémité de la projection avant 35 du support de gomme reste entourée par l'extrémité arrière 25 du fût, afin que le support de gomme reste interdit de rotation.The sleeve 50 has an annular shoulder 56 directed radially inwards at the opening 4 for the passage of the rubber 40 and flush with the surface of the eraser. This annular shoulder participates in blocking the rubber in the radial direction, and constitutes an abutment against which the flexible arms 36 of the rubber support 30 abut in the maximum output configuration of the rubber as shown in FIG. 3, thus preventing said carrier out of the sleeve. In this configuration, the end of the front projection 35 of the eraser holder remains surrounded by the rear end 25 of the barrel, so that the eraser holder is prevented from rotating.
On notera que pour passer de la première position de rotation du manchon (figure 2a) pour laquelle la gomme est en configuration de rétractation à la deuxième position de rotation du manchon (figure 3) pour laquelle la gomme est en configuration de sortie maximale, le manchon effectue plusieurs tours.Note that to move from the first position of rotation of the sleeve (Figure 2a) for which the rubber is in the retraction configuration at the second position of rotation of the sleeve (Figure 3) for which the rubber is in the maximum output configuration, the sleeve performs several turns.
Comme visible sur les figures Ib et 2b, l'empêchement de toute rotation entre le support de gomme 30 et le fût 20 est réalisé par la coopération de forme entre des premiers organes de guidage longitudinal constitués par les méplats 31 de la projection avant 35 du support et des premiers organes de guidage longitudinal complémentaires constitués par les méplats 21 de la paroi intérieure de la portion arrière 24 du fût. Avec une vue en coupe qui serait réalisée pour la configuration de la figure 3 selon le plan de coupe I-I de la figure 2a, on obtiendrait la même vue de la figure 2b.As can be seen in FIGS. 1b and 2b, the prevention of any rotation between the rubber support 30 and the barrel 20 is achieved by the shape cooperation between first longitudinal guiding members constituted by the flats 31 of the projection before 35 of the support and first complementary longitudinal guide members constituted by the flats 21 of the inner wall of the rear portion 24 of the barrel. With a sectional view that would be performed for the configuration of Figure 3 along the sectional plane I-I of Figure 2a, we would get the same view of Figure 2b.
On notera que la projection avant 35 du support de gomme coulisse directement contre la paroi interne du fût 20, ce qui présente un avantage pour renforcer le maintien en alignement axial du support de gomme avec le fût et par conséquent pour limiter les écarts d'alignement du support causés par les efforts transversaux exercés sur la gomme en utilisation.It should be noted that the front projection 35 of the rubber support slides directly against the inner wall of the barrel 20, which has the advantage of reinforcing the keeping in axial alignment of the rubber support with the barrel and consequently to limit the alignment deviations the support caused by the efforts transversals exerted on the eraser in use.
Sur les figures 4 et 5, un autre mode de réalisation d'un instrument d'écriture selon l'invention est représenté partiellement en vue éclatée, respectivement en coupe longitudinale et en perspective. Un manchon de protection 150 est formé par l'assemblage de deux parties, une partie avant 150B et une partie arrière 150A, et est mobile en translation et en rotation par rapport à un fut 120. Un clip 151 est formé intégralement avec la partie arrière 150A du manchon, mais il est entendu que la présence d'un clip n'est pas nécessaire pour l'invention.In Figures 4 and 5, another embodiment of a writing instrument according to the invention is partially shown in exploded view, respectively in longitudinal section and in perspective. A protective sleeve 150 is formed by assembling two parts, a front portion 150B and a rear portion 150A, and is movable in translation and rotation relative to a barrel 120. A clip 151 is formed integrally with the rear portion. 150A of the sleeve, but it is understood that the presence of a clip is not necessary for the invention.
Un support de gomme 130, interdit de rotation par rapport au fût 120, est apte à coulisser en translation dans le fût uniquement pour actionner un mécanisme d'avance d'une cartouche d'écriture (non représentée). Il présente une projection avant 135 s 'étendant longitudinalement et dont la surface extérieure forme un cylindre. Il présente en outre une surface externe de guidage 133 essentiellement cylindrique dont le diamètre D 133 est supérieur au diamètre extérieur de la projection avant 135 en étant sensiblement égal au diamètre D 120 de la paroi interne du fût 120. Un épaulement annulaire 134 est formé à la jonction entre la surface externe de guidage 133 et la projection avant 135. Au niveau d'un prolongement radial de cet épaulement annulaire, un premier organe de guidage longitudinal 131 est formé par une protubérance saillante extérieurement sur la surface externe de guidage 133. En décalage vers l'arrière du support 130 par rapport au premier organe de guidage longitudinal 131, deux deuxièmes organes de guidage 132 latéralement opposés sont formés chacun par un ergot saillant extérieurement sur la surface externe de guidage 133. Ces deux ergots 132 sont disposés selon un diamètre du cylindre formé par la surface externe de guidage 133, mais il pourrait néanmoins être prévu un certain décalage de la position longitudinale des ergots.A rubber support 130, which is prevented from rotating relative to the barrel 120, is able to slide in translation in the barrel only to actuate a mechanism for advancing a writing cartridge (not represented). It has a projection before 135 extending longitudinally and whose outer surface forms a cylinder. It furthermore has a substantially cylindrical outer guide surface 133 whose diameter D 133 is greater than the outside diameter of the front projection 135 and is substantially equal to the diameter D 120 of the inside wall of the barrel 120. An annular shoulder 134 is formed at the junction between the outer guide surface 133 and the front projection 135. At a radial extension of this annular shoulder, a first longitudinal guide member 131 is formed by a protuberance projecting externally on the outer guide surface 133. In rearward shifting of the support 130 relative to the first longitudinal guide member 131, two second laterally opposite guide members 132 are each formed by a lug protruding outwardly on the outer guide surface 133. These two lugs 132 are arranged according to a diameter of the cylinder formed by the outer guide surface 133, but it could nevertheless be pre seen a certain shift of the longitudinal position of the lugs.
La projection avant 135 du support de gomme 130 est emmanchée à l'intérieur d'un tube réservoir de mines 110 de la cartouche d'écriture, ce tube étant apte à coulisser en translation à l'intérieur du fût 120 pour actionner le mécanisme d'avance de la cartouche d'écriture. L'emmanchement est réalisé de façon à ce que le tube réservoir de mines 110 soit solidaire en translation du support de gomme 130. L 'épaulement annulaire 134 du support de gomme 130 sert de butée pour l'extrémité arrière du tube réservoir 110. Il peut être prévu un emmanchement particulièrement fort avec friction, de façon à ce qu'en pratique le support et le tube ne puissent pas être séparés. Il est entendu que l'ensemble du support de gomme peut présenter un alésage sur toute sa longueur pour permettre de recharger en mines le tube réservoir après avoir retiré la gomme. Dans un autre mode de réalisation possible, la projection avant du support de gomme ne présente pas de passage intérieur et un emmanchement ne nécessitant qu'un effort modéré peut être prévu de façon à ce que l'utilisateur puisse séparer le support de gomme d'avec le tube réservoir pour recharger en mines ledit tube et puisse assembler de nouveau ces deux éléments sans difficulté particulière. Encore dans un autre mode de réalisation non représenté, le support de gomme et le tube réservoir sont réalisés en une seule pièce tubulaire, auquel cas la surface externe de guidage du support consiste en une portion arrière du tube réservoir, et lesdits premier organe de guidage longitudinal et deuxièmes organes de guidage sont préférablement réalisés par moulage avec cette pièce tubulaire. Le fût 120 présente une paroi extérieure essentiellement cylindrique et comprend une projection arrière 124 dont le diamètre extérieur est inférieur au diamètre extérieur du fût. Cette projection arrière 124 présente une fente longitudinale 121 débouchant sur l'extrémité arrière 125 du fût. Cette fente 121 constitue un premier organe de guidage longitudinal complémentaire adapté pour permettre un coulissement en translation et sans possibilité de rotation de la protubérance 131 formant le premier organe de guidage longitudinal du support de gomme 130. Préférablement, le rayon extérieur de la protubérance 131 n'excède pas le rayon extérieur de la projection arrière 124 du fût.The projection before 135 of the rubber support 130 is fitted inside a mine reservoir tube 110 of the writing cartridge, this tube being able to slide in translation inside the barrel 120 to actuate the mechanism advance of the writing cartridge. The fitting is carried out so that the mine reservoir tube 110 is integral in translation with the rubber support 130. The annular shoulder 134 of the rubber support 130 serves as a stop for the rear end of the reservoir tube 110. can be provided a particularly fitting strong with friction, so that in practice the support and the tube can not be separated. It is understood that the entire rubber holder may have a bore along its length to allow to recharge the tank tube mines after removing the eraser. In another possible embodiment, the front projection of the rubber support has no internal passage and a fitting requiring only moderate effort can be provided so that the user can separate the rubber support with the reservoir tube to reload mines said tube and can reassemble these two elements without particular difficulty. In yet another embodiment not shown, the rubber support and the reservoir tube are made in a single tubular part, in which case the outer surface for guiding the support consists of a rear portion of the reservoir tube, and said first guide member. longitudinal and second guide members are preferably made by molding with this tubular piece. The barrel 120 has a substantially cylindrical outer wall and comprises a rear projection 124 whose outer diameter is smaller than the outside diameter of the barrel. This rear projection 124 has a longitudinal slot 121 opening on the rear end 125 of the barrel. This slot 121 constitutes a first complementary longitudinal guide member adapted to allow sliding in translation and without the possibility of rotation of the protuberance 131 forming the first longitudinal guiding member of the eraser support 130. Preferably, the outer radius of the protrusion 131 n does not exceed the outer radius of the rear projection 124 of the barrel.
La partie avant 150B et la partie arrière 150A du manchon de protection 150 sont prévues pour être emmanchées en force l'une dans l'autre de façon à éviter tout risque de séparation mutuelle en condition normale d'utilisation. La partie avant 150B présente une portion avant 154 entourant l'extrémité arrière 125 du fût. Cette portion avant 154 présente un diamètre intérieur D 154 sensiblement égal au diamètre extérieur de la projection arrière 124 du fût, de façon à pouvoir coulisser en translation et en rotation directement contre la paroi extérieure de ladite projection arrière 124. Elle présente de plus un bord d'extrémité avant 155 apte à venir en butée contre un épaulement annulaire 122 formé sur la surface extérieure du fût par la projection arrière 124. Un tel positionnement en butée est réalisé en particulier dans la configuration de sortie maximale de la gomme, comme visible sur les figures 7a et 7b, ce qui empêche un déplacement axial du manchon 150 vers le fût 120.The front portion 150B and the rear portion 150A of the protective sleeve 150 are provided to be force-fitted into each other so as to avoid any risk of mutual separation under normal conditions of use. The front portion 150B has a front portion 154 surrounding the rear end 125 of the barrel. This front portion 154 has an internal diameter D 154 substantially equal to the outer diameter of the rear projection 124 of the barrel, so as to slide in translation and in rotation directly against the outer wall of said rear projection 124. It also has an edge end end 155 adapted to abut against an annular shoulder 122 formed on the outer surface of the barrel by the rear projection 124. Such abutment positioning is achieved in particular in the maximum output configuration of the eraser, as visible in FIGS. 7a and 7b, which prevents axial displacement of the sleeve 150 towards the barrel 120.
La partie avant 150B du manchon présente en outre une projection arrière 158 n'entourant pas le rut et ayant une surface extérieure 159 définissant un cylindre dont le diamètre D 159 est sensiblement égal au diamètre D 152 d'une ouverture avant de la partie arrière 150A du manchon. Ceci permet de réaliser un emmanchement en force avec friction de la projection arrière 158 dans la partie arrière 150A. La projection arrière 158 présente une surface interne de guidage 153 adjacente à la surface externe de guidage 133 du support de gomme 130, le diamètre D 153 de la surface interne de guidage 153 étant sensiblement égal au diamètre D 133 de la surface externe de guidage 133. Cette surface interne de guidage 153 présente deux bords constituant deux chemins de came 152Bl, 152B2 sensiblement hélicoïdaux et symétriques entre eux par rapport à un axe longitudinal, entre lesquels sont ménagées deux fentes 157Bl, 157B2 diamétralement opposées, comme visible également sur la vue en perspective de la figure 12.The front portion 150B of the sleeve further has a rear projection 158 not surrounding the rut and having an outer surface 159 defining a cylinder whose diameter D 159 is substantially equal to the diameter D 152 of a front opening of the rear portion 150A of the sleeve. This makes it possible to friction fit the rear projection 158 in the rear portion 150A. The rear projection 158 has an inner guide surface 153 adjacent to the outer guide surface 133 of the eraser support 130, the diameter D 153 of the inner guide surface 153 being substantially equal to the diameter D 133 of the outer guide surface 133 This inner guide surface 153 has two edges constituting two cam paths 152B1, 152B2 substantially helical and symmetrical to each other with respect to a longitudinal axis, between which are formed two diametrically opposite slots 157B1, 157B2, as can also be seen in the view. perspective of Figure 12.
La largeur de chaque fente 157Bl, 157B2 est supérieure ou égale au diamètre de chaque ergot 132 du support de gomme 130, de façon à ce que la partie avant 150B du manchon puisse être engagée autour du support de gomme par l'arrière de ce dernier en faisant passer chaque ergot par une fente. Le rayon extérieur de la protubérance 131 du support de gomme 130 est inférieur ou égal au diamètre intérieur D 154 de la portion avant 154, afin de permettre l'engagement de la partie avant 150B autour du support de gomme. Cet engagement est terminé lorsque la protubérance 131 arrive en butée contre un épaulement annulaire intérieur de la partie avant 150B à la jonction entre la portion avant 154 et la projection arrière 158. Il est entendu que la largeur de la protubérance 131 peut être supérieure à celle de chaque fente 157Bl, 157B2, puisque il n'est pas nécessaire que la protubérance 131 puisse passer par une de ces fentes.The width of each slot 157B1, 157B2 is greater than or equal to the diameter of each lug 132 of the rubber holder 130, so that the front portion 150B of the sleeve can be engaged around the rubber holder by the rear of the latter by passing each lug through a slot. The outer radius of the protuberance 131 of the eraser support 130 is less than or equal to the inner diameter D 154 of the front portion 154, to allow the front portion 150B to engage around the eraser support. This engagement is completed when the protuberance 131 abuts against an annular shoulder inside the front portion 150B at the junction between the front portion 154 and the rear projection 158. It is understood that the width of the protuberance 131 may be greater than that each slot 157B1, 157B2, since it is not necessary that the protuberance 131 can pass through one of these slots.
La partie arrière 150A du manchon présente une surface interne de guidage 153 de même diamètre D 153 que celui de la surface interne de guidage de la projection arrière 158 de la partie avant 150B du manchon. Cette surface interne de guidage 153 est adjacente à la surface externe de guidage 133 du support de gomme 130, et de même que pour la partie avant 150B, présente deux bords constituant deux chemins de came 152Al et 152A2 sensiblement hélicoïdaux et symétriques entre eux par rapport à un axe longitudinal. Chaque chemin de came 152Al, 152A2 s'étend angulairement sur moins de 180° entre un premier élément de positionnement angulaire 157Al et un second élément de positionnement angulaire 157A2 diamétralement opposés.The rear portion 150A of the sleeve has an inner guide surface 153 of the same diameter D 153 as that of the inner surface for guiding the rear projection 158 of the front portion 150B of the sleeve. This inner guiding surface 153 is adjacent to the outer guiding surface 133 of the rubber support 130, and as for the front portion 150B, has two edges constituting two cam paths 152Al and 152A2 substantially helical and symmetrical to each other with respect to a longitudinal axis. Each cam path 152A1, 152A2 extends angularly less than 180 ° between a first angular positioning member 157A1 and a second angularly opposed positioning member 157A2.
Comme visible également sur la vue en perspective de la figure 11, chaque élément de positionnement angulaire 157Al, 157A2 consiste en une projection formée à l'avant de la surface interne de guidage 153 de ladite partie arrière 150A et qui présente une extrémité sous la forme d'une nervure dont la largeur est sensiblement égale à la largeur d'une fente 157Bl, 157B2. De cette façon, une fois la partie avant 15OB du manchon engagée autour du support de gomme, la partie arrière 150A du manchon est guidée en translation pour son assemblage avec la partie avant 150B du fait que chaque élément de positionnement angulaire 157Al, 157A2 est adapté pour venir s'engager dans une fente correspondante 157Bl, 157B2. En outre, l'engagement des éléments de positionnement angulaire de la partie arrière dans les fentes correspondantes de la partie avant permet d'empêcher fermement toute rotation relative entre la partie avant et la partie arrière.As can also be seen in the perspective view of FIG. 11, each angular positioning member 157Al, 157A2 consists of a projection formed in front of the inner guide surface 153 of said rear portion 150A and which has an end in the form of a rib whose width is substantially equal to the width of a slot 157B1, 157B2. In this way, once the front part 15OB of the sleeve engaged around the rubber support, the rear portion 150A of the sleeve is guided in translation for its assembly with the front portion 150B because each angular positioning member 157Al, 157A2 is adapted to engage in a corresponding slot 157Bl, 157B2. In addition, the engagement of the angular positioning members of the rear portion in the corresponding slots of the front portion makes it possible to firmly prevent any relative rotation between the front portion and the rear portion.
Les chemins de came respectifs des deux parties du manchon sont conformés de telle sorte que deux gorges 152 sensiblement hélicoïdales et symétriques entre elles par rapport à un axe longitudinal sont créées, chaque gorge étant délimitée par deux chemins de came en vis-à-vis longitudinalement une fois les deux parties du manchon assemblées. Chaque ergot 132 constituant un deuxième organe de guidage du support de gomme 130 se trouve engagé dans une gorge 152 constituant un deuxième organe de guidage complémentaire. De cette façon, la rotation du manchon 150 entraine un mouvement de translation du manchon relativement au support de gomme. Le guidage en translation du manchon est assuré grâce d'une part au coulissement de la portion avant 154 du manchon autour de la projection arrière 124 du fût et d'autre part au coulissement de la surface interne de guidage 153 du manchon autour de la surface externe de guidage 133 du support de gomme. On notera que l'extrémité arrière 125 du fût reste toujours entourée par la portion avant 154 du manchon. II n'est pas nécessaire pour l'invention que le manchon de protection soit réalisé en deux parties. De façon connue en soi, il peut en effet être prévu un manchon de protection en une seule partie présentant une paroi interne qui comporte au moins une gorge constituant un dit deuxième organe de guidage complémentaire, l'engagement dans la gorge d'au moins un dit deuxième organe de guidage du support de gomme tel qu'un ergot étant réalisé par déformation élastique de ladite paroi interne et/ou dudit deuxième organe de guidage.The respective cam paths of the two parts of the sleeve are shaped such that two grooves 152 substantially helical and symmetrical with each other with respect to a longitudinal axis are created, each groove being delimited by two cam paths vis-à-vis longitudinally once the two parts of the sleeve are assembled. Each lug 132 constituting a second guide member of the rubber support 130 is engaged in a groove 152 constituting a second complementary guide member. In this way, the rotation of the sleeve 150 causes a translation movement of the sleeve relative to the rubber support. The guide in translation of the sleeve is provided thanks firstly to the sliding of the front portion 154 of the sleeve around the rear projection 124 of the barrel and secondly to the sliding of the inner guide surface 153 of the sleeve around the surface external guide 133 of the eraser support. Note that the rear end 125 of the barrel still remains surrounded by the front portion 154 of the sleeve. It is not necessary for the invention that the protective sleeve is made in two parts. In a manner known per se, it may in fact be provided with a one-piece protective sleeve having an inner wall which comprises at least one groove constituting a said second complementary guiding member, the engagement in the groove of at least one said second guiding member of the rubber support such that a lug being made by elastic deformation of said inner wall and / or said second guide member.
En outre, dans un autre mode de réalisation non représenté selon l'invention, chaque deuxième organe de guidage peut être prévu comme un prolongement du premier organe de guidage longitudinal du support de gomme dans la direction radiale. Par exemple, des modifications à apporter au mode de réalisation décrit précédemment (figures 4 et 5) pour aboutir à cet autre mode de réalisation consisteraient notamment à prévoir que la projection arrière 124 du fût 120 soit intercalée radialement entre la surface externe de guidage 133 du support de gomme et la surface interne de guidage 153 du manchon, en allongeant ladite projection arrière 124 et en augmentant le diamètre Dl 53 de ladite surface interne de guidage. On pourrait en outre prévoir deux fentes 121 de guidage longitudinal diamétralement opposées, supprimer la protubérance 131 et prolonger radialement vers l'extérieur chaque ergot 132 pour qu'il traverse une fente 121 avec possibilité de coulissement en translation dans la fente et soit engagé dans une gorge 152 du manchon. La partie d'un ergot 132 disposée dans une fente 121 pourrait prendre une forme analogue à celle de la protubérance 131 supprimée et constituerait un premier organe de guidage longitudinal, tandis que la partie cylindrique de l'ergot 132 qui ressort de la fente 121 pour coopérer avec une gorge 152 constituerait un deuxième organe de guidage. Il est entendu que ce mode de réalisation peut être combiné avec celui mentionné précédemment consistant à réaliser le support de gomme en une seule pièce tabulaire avec le tube réservoir.In addition, in another embodiment not shown according to the invention, each second guide member may be provided as an extension of the first longitudinal guiding member of the rubber support in the radial direction. For example, modifications to be made to the previously described embodiment (FIGS. 4 and 5) to arrive at this other embodiment would consist in particular in providing that the rear projection 124 of the barrel 120 is interposed radially between the external guiding surface 133 of the gum carrier and the inner guide surface 153 of the sleeve, by extending said rear projection 124 and increasing the diameter D1 53 of said inner guide surface. It would further be possible to provide two diametrically opposed longitudinal guide slots 121, to eliminate the protrusion 131 and to extend radially outwardly each pin 132 so that it passes through a slot 121 with the possibility of translational sliding in the slot and is engaged in a groove 152 of the sleeve. The portion of a lug 132 disposed in a slot 121 could take a shape similar to that of the protrusion 131 removed and would constitute a first longitudinal guide member, while the cylindrical portion of the lug 132 which emerges from the slot 121 to cooperating with a groove 152 would constitute a second guide member. It is understood that this embodiment can be combined with that mentioned above consisting in producing the rubber support in a single tabular part with the reservoir tube.
Dans le mode de réalisation décrit en rapport avec les figures 4 et 5, et comme représenté sur les figures 6a et 6b, le manchon 150 peut être déplacé dans une première position pour laquelle la gomme 140 est en configuration de rétractation. Un premier espacement longitudinal est prévu entre le bord d'extrémité avant 155 du manchon et l'épaulement annulaire 122 du fût, et un second espacement longitudinal est prévu entre la protubérance 131 du support de gomme 130 et l'extrémité avant de la fente longitudinale 121 du fût dans laquelle la protubérance 131 peut coulisser pour actionner le mécanisme d'avance de la cartouche d'écriture. La partie arrière 150A du manchon présente un épaulement annulaire 156 de relativement faible épaisseur radiale, dirigé vers l'intérieur au niveau de l'ouverture pour le passage de la gomme 140 et affleurant à la surface de la gomme. Le support de gomme 130 présente à l'arrière une projection tabulaire 136 d'épaisseur radiale sensiblement égale à celle de l'épaulement annulaire 156 et adaptée pour maintenir enserrée une portion de la gomme 140. Un troisième espacement longitudinal est prévu entre la projection tabulaire 136 et l'épaulement annulaire 156, supérieur ou égal au premier espacement longitudinal afin de ne pas empêcher la venue en butée du bord d'extrémité avant 155 du manchon contre l'épaulement annulaire 122 du fût dans la configuration de sortie maximale de la gomme comme visible sur la figure 7a.In the embodiment described with reference to FIGS. 4 and 5, and as shown in FIGS. 6a and 6b, the sleeve 150 can be moved to a first position for which the eraser 140 is in the retraction configuration. A first longitudinal spacing is provided between the leading end edge 155 of the sleeve and the annular shoulder 122 of the barrel, and a second Longitudinal spacing is provided between the protrusion 131 of the eraser holder 130 and the forward end of the longitudinal slot 121 of the barrel wherein the protuberance 131 is slidable to actuate the advance mechanism of the write cartridge. The rear portion 150A of the sleeve has an annular shoulder 156 of relatively small radial thickness, directed inwards at the opening for the passage of the rubber 140 and flush with the surface of the rubber. The rubber support 130 has at the rear a tabular projection 136 of radial thickness substantially equal to that of the annular shoulder 156 and adapted to hold a portion of the gum 140 enclosed. A third longitudinal spacing is provided between the tabular projection. 136 and the annular shoulder 156, greater than or equal to the first longitudinal spacing so as not to prevent abutment of the front end edge 155 of the sleeve against the annular shoulder 122 of the barrel in the maximum output configuration of the eraser as shown in Figure 7a.
A partir de la première position du manchon 150, comme visible sur les figures 6a et 6b, une pression exercée sur la gomme 140 ou sur le manchon 150 en direction du fût 120 provoque le coulissement en translation du support de gomme 130 et par conséquent l'actionnement du mécanisme d'avance de la cartouche d'écriture. La course de cette translation est limitée par la venue en butée du bord d'extrémité avant 155 du manchon contre l'épaulement annulaire 122 du fût ou par la venue en butée de la protubérance 131 contre l'extrémité avant de la fente 121 du fût.From the first position of the sleeve 150, as can be seen in FIGS. 6a and 6b, a pressure exerted on the rubber 140 or on the sleeve 150 in the direction of the barrel 120 causes the translational sliding of the rubber support 130 and consequently the actuation of the advance mechanism of the writing cartridge. The stroke of this translation is limited by the abutment of the front end edge 155 of the sleeve against the annular shoulder 122 of the barrel or by the abutment of the protuberance 131 against the front end of the slot 121 of the barrel .
On notera que le support de gomme 130 coulisse directement contre la paroi interne de la projection arrière 124 du fût, ce qui présente un avantage pour renforcer le maintien en alignement axial du support de gomme avec le fût et par conséquent pour limiter les écarts d'alignement du support causés par les efforts transversaux exercés sur la gomme en utilisation.It will be noted that the rubber support 130 slides directly against the inner wall of the rear projection 124 of the drum, which has the advantage of reinforcing the keeping in axial alignment of the rubber support with the drum and consequently to limit the differences in alignment of the support caused by the transverse forces exerted on the eraser in use.
Comme représenté sur les figures 7a et 7b, le manchon 150 peut être déplacé dans une deuxième position pour laquelle la gomme 140 est en configuration de sortie maximale. Cette deuxième position est obtenue à partie de la première position grâce à une rotation du manchon 150 autour de son axe longitudinal dans le sens de la flèche représentée sur la figure 6b. Comme visible sur la figure 7b, le manchon 150 et le clip ont été tournés de plus de 90° par rapport au fût 120, la position du fut repérée par la ligne virtuelle L dans l'alignement de la fente 121 restant inchangée. Dans cette deuxième position du manchon 150, le bord d'extrémité avant 155 du manchon vient en butée contre l'épaulement annulaire 122 du fut, ce qui empêche tout déplacement axial supplémentaire du manchon vers le fut et interdit par conséquent le coulissement en translation du support de gomme 130.As shown in FIGS. 7a and 7b, the sleeve 150 can be moved to a second position for which the eraser 140 is in the maximum output configuration. This second position is obtained from the first position by a rotation of the sleeve 150 about its longitudinal axis in the direction of the arrow shown in Figure 6b. As can be seen in FIG. 7b, the sleeve 150 and the clip have been rotated more than 90.degree. With respect to the barrel 120, the position of which was marked by the virtual line L in the alignment of the slot 121 remaining unchanged. In this second position of the sleeve 150, the front end edge 155 of the sleeve abuts against the annular shoulder 122 of the barrel, which prevents any further axial displacement of the sleeve towards the barrel and therefore prohibits sliding in translation of the sleeve. rubber support 130.
La configuration de sortie maximale de la gomme 140 correspond donc à une position du manchon procurant un verrouillage de l'avance de la cartouche d'écriture, ce qui présente l'avantage notamment de permettre à l'utilisateur d'utiliser la gomme en tenant l'instrument d'écriture entièrement ou au moins en partie par le fut 120 sans risquer de provoquer une avance non souhaitée de la cartouche. On notera que dans ce mode de réalisation le manchon de protection peut être proportionnellement plus court par rapport au fut en comparaison avec le mode de réalisation relatif au figures la et Ib. Un tel verrouillage permet qu'un ressort de rappel ayant une raideur relativement faible soit prévu pour la cartouche d'écriture afin que l'actionnement du mécanisme d'avance de la cartouche demande moins d'effort à l'utilisateur, ce qui permet par ailleurs de diminuer le poids et le coût du ressort de rappel. L'instrument d'écriture selon l'invention décrit dans les modes de réalisation qui précèdent est de type porte-mine, mais il est entendu que l'invention n'est pas limitée à l'utilisation d'une cartouche d'écriture à mines. L'invention peut en effet s'appliquer à un instrument d'écriture comportant une cartouche d'encre effaçable par une gomme. En outre, il n'est pas indispensable que la cartouche d'écriture comprenne un tube réservoir pouvant être actionné pour coulisser dans un fût. En particulier, dans le cas d'une cartouche d'encre, celle-ci peut être prévue solidaire d'une pointe d'écriture fixe. The maximum output configuration of the eraser 140 therefore corresponds to a position of the sleeve providing locking of the advance of the writing cartridge, which has the particular advantage of allowing the user to use the eraser by holding the writing instrument entirely or at least in part by the 120 without risk of causing an unwanted advance of the cartridge. Note that in this embodiment the protective sleeve may be proportionally shorter compared to the was in comparison with the embodiment relating to Figures la and Ib. Such a locking allows a return spring having a relatively low stiffness is provided for the write cartridge so that the actuation of the cartridge advance mechanism requires less effort to the user, which also allows to reduce the weight and cost of the return spring. The writing instrument according to the invention described in the preceding embodiments is of the type pencil, but it is understood that the invention is not limited to the use of a writing cartridge to mines. The invention can indeed be applied to a writing instrument comprising an erasable ink cartridge with an eraser. In addition, it is not essential that the writing cartridge comprises a reservoir tube that can be actuated to slide in a drum. In particular, in the case of an ink cartridge, it can be provided integral with a fixed writing tip.

Claims

Revendications claims
1/ Instrument d'écriture comprenant un fut (20 ; 120) présentant une paroi interne et s'étendant longitudinalement entre une extrémité avant munie d'une pointe d'écriture et une extrémité arrière (25, 125), comprenant en outre un dispositif de sortie de gomme qui comporte : une gomme (40, 140) pouvant prendre une configuration de sortie maximale et une configuration de rétractation dans laquelle elle est au moins en partie protégée ; un manchon (50, 150) de protection de la gomme, mobile au moins en rotation par rapport audit fut (20 ; 120) entre une première position pour laquelle la gomme est en configuration de rétractation et une deuxième position pour laquelle la gomme est en configuration de sortie maximale; et un support (30, 130) de gomme auquel est fixée la gomme (40, 140), muni d'au moins un premier organe de guidage longitudinal (31, 131) coopérant directement avec un premier organe de guidage longitudinal complémentaire (21, 121) solidaire du fut (20 ; 120) pour interdire tout mouvement de rotation entre ledit support (30, 130) et le fut, et muni d'au moins un deuxième organe de guidage (32, 132) coopérant avec un deuxième organe de guidage complémentaire (52, 152) solidaire du manchon (50, 150) de manière à ce que la rotation du manchon entraine un mouvement de translation relative entre ledit support (30, 130) et le manchon, caractérisé en ce que le manchon (50, 150) présente une portion avant (54, 154) entourant l'extrémité arrière (25, 125) du fût et une portion arrière (51 ; 158, 150A) n'entourant pas le fut qui présente une surface interne de guidage (53, 153) comportant le deuxième organe de guidage complémentaire (52, 152), le support (30, 130) de gomme étant apte à coulisser directement contre la paroi interne du fut et présentant une surface externe de guidage (33, 133) comportant le deuxième organe de guidage (32, 132).A writing implement comprising a cartridge (20; 120) having an inner wall and extending longitudinally between a front end having a writing tip and a rear end (25, 125), further comprising a device rubber output apparatus comprising: an eraser (40, 140) that can assume a maximum output configuration and a retraction configuration in which it is at least partially protected; a sleeve (50, 150) for protecting the eraser, at least in rotation with respect to said sleeve (20; 120) between a first position for which the eraser is in the retraction configuration and a second position for which the eraser is in position; maximum output configuration; and a rubber support (30, 130) to which the rubber (40, 140) is attached, provided with at least one first longitudinal guiding member (31, 131) cooperating directly with a complementary first longitudinal guiding member (21, 121) secured to the shaft (20; 120) to prevent any rotational movement between said support (30, 130) and the support, and provided with at least one second guide member (32, 132) cooperating with a second complementary guide (52, 152) integral with the sleeve (50, 150) so that the rotation of the sleeve causes a relative translation movement between said support (30, 130) and the sleeve, characterized in that the sleeve (50 , 150) has a front portion (54, 154) surrounding the rear end (25, 125) of the barrel and a rear portion (51; 158, 150A) not surrounding the barrel which has an inner guide surface (53). , 153) comprising the second complementary guiding member (52, 152), the rubber support (30, 130) so adapted to slide directly against the inner wall of the fut and having an outer guide surface (33, 133) having the second guide member (32, 132).
2/ Instrument d'écriture selon la revendication 1, dans lequel le fût (20, 120) comporte des moyens de butée (22, 122) aptes à coopérer avec un bord d'extrémité avant (55, 155) du manchon (50, 150) pour empêcher un déplacement axial du manchon vers le fût au moins dans la configuration de sortie maximale de la gomme (40, 140).2 / writing instrument according to claim 1, wherein the shaft (20, 120) comprises stop means (22, 122) adapted to cooperate with a front end edge (55, 155) of the sleeve (50, 150) to prevent axial movement of the sleeve to the barrel at least in the maximum output configuration of the eraser (40, 140).
3/ Instrument d'écriture selon la revendication 1 ou 2, dans lequel la surface externe de guidage (33, 133) du support de gomme est adjacente à la surface interne de guidage (53, 153) du manchon, et ledit au moins un deuxième organe de guidage (32, 132) est radialement saillant vers l'extérieur et est axialement décalé vers l'arrière du support (30, 130) de gomme par rapport audit au moins un premier organe de guidage longitudinal (31, 131).3 / Writing instrument according to claim 1 or 2, wherein the outer guiding surface (33, 133) of the rubber support is adjacent to the inner guide surface (53, 153) of the sleeve, and said at least one second guide member (32, 132) is radially outwardly projecting and is axially offset rearwards from the gum support (30, 130) with respect to said at least one first longitudinal guide member (31, 131).
4/ Instrument d'écriture selon l'une quelconque des revendications 1 à 3, dans lequel ledit deuxième organe de guidage complémentaire (52, 152) est une gorge formée dans ladite surface interne (53, 153) de guidage du manchon.4 / Writing instrument according to any one of claims 1 to 3, wherein said second complementary guide member (52, 152) is a groove formed in said inner surface (53, 153) for guiding the sleeve.
5/ Instrument d'écriture selon l'une quelconque des revendications 1 à 4, dans lequel le support (30, 130) de gomme présente une projection avant (35, 135) s 'étendant longitudinalement et dont la surface extérieure forme au moins approximativement un cylindre.A writing implement according to any one of claims 1 to 4, wherein the gum carrier (30, 130) has a forward projection (35, 135) extending longitudinally and whose outer surface forms at least approximately a cylinder.
6/ Instrument d'écriture selon l'une quelconque des revendications 4 à 5, dans lequel ladite gorge (52, 152) constituant ledit deuxième organe de guidage complémentaire forme un chemin hélicoïdal, et le support (30, 130) de gomme présente deux deuxièmes organes de guidage (32, 132) latéralement opposés engagés dans ladite gorge.6 / writing instrument according to any one of claims 4 to 5, wherein said groove (52, 152) constituting said second complementary guide member forms a helical path, and the support (30, 130) of gum presents two second laterally opposed guide members (32, 132) engaged in said groove.
Il Instrument d'écriture selon l'une quelconque des revendications 1 à 6, dans lequel le manchon (50) est relié au fût (20) de façon à pouvoir tourner relativement au fût (20) sans possibilité de déplacement en translation.Writing instrument according to any one of claims 1 to 6, wherein the sleeve (50) is connected to the shaft (20) so as to be rotatable relative to the shaft (20) without the possibility of displacement in translation.
8/ Instrument d'écriture selon la revendication 7, dans lequel le fût (20) comprend une portion arrière (24) présentant une paroi extérieure essentiellement cylindrique entourée par la portion avant (54) du manchon (50) et qui comporte au moins deux protubérances (24A) disposées selon un cercle périphérique, ladite portion avant (54) présentant une paroi interne comportant une gorge annulaire (54A) dans laquelle lesdites protubérances (24A) sont engagées.8 / writing instrument according to claim 7, wherein the shaft (20) comprises a rear portion (24) having a substantially cylindrical outer wall surrounded by the front portion (54) of the sleeve (50) and which comprises at least two protuberances (24A) arranged in a peripheral circle, said front portion (54) having an inner wall having an annular groove (54A) in which said protuberances (24A) are engaged.
9/ Instrument d'écriture selon les revendications 8 et 5 prises en combinaison, dans lequel ledit au moins un premier organe de guidage longitudinal9 / Writing instrument according to claims 8 and 5 taken in combination, wherein said at least one first longitudinal guiding member
(31) est formé par un méplat s 'étendant longitudinalement sur la surface extérieure de la projection avant (35) du support (30), et la portion arrière (24) du fût (20) présente une paroi intérieure sur laquelle est formé au moins un méplat constituant un dit premier organe de guidage longitudinal complémentaire (21).(31) is formed by a flattening extending longitudinally on the outer surface of the front projection (35) of the support (30), and the rear portion (24) of the barrel (20) has an inner wall on which is formed at minus one component flat a said first complementary longitudinal guide member (21).
10/ Instrument d'écriture selon les revendications 2 et 8 prises en combinaison, dans lequel lesdits moyens de butée (22) sont formés à l'avant desdites protubérances (24A) par une partie annulaire saillante extérieurement du fut (20), le bord d'extrémité avant (55) du manchon (50) étant apte à appuyer en butée contre ladite partie annulaire (22).10 / Writing instrument according to claims 2 and 8 taken in combination, wherein said stop means (22) are formed in front of said protuberances (24A) by an annular portion projecting from the outside (20), the edge front end (55) of the sleeve (50) being able to abut against said annular portion (22).
11/ Instrument d'écriture selon l'une quelconque des revendications 1 à 10, comportant un mécanisme d'avance d'une cartouche d'écriture, dans lequel le fut comprend une première pièce (12) essentiellement tabulaire traversée latéralement par un bouton (14) d'actionnement dudit mécanisme d'avance, et comprend de plus une seconde pièce (20) essentiellement tabulaire comportant le premier organe de guidage longitudinal complémentaire (21) et reliée de manière fixe à ladite première pièce (12).11 / writing instrument according to any one of claims 1 to 10, comprising a mechanism for advancing a writing cartridge, wherein the fut comprises a first piece (12) substantially tabular traversed laterally by a button ( 14) for actuating said feed mechanism, and further comprises a second substantially tabular member (20) having the first complementary longitudinal guide member (21) and fixedly connected to said first member (12).
12/ Instrument d'écriture selon l'une quelconque des revendications 1 à 6, comportant un mécanisme d'avance d'une cartouche d'écriture, dans lequel le support (130) de gomme est relié solidairement à un tube réservoir (110) de ladite cartouche disposé à l'intérieur du fut (120) de manière coaxiale avec ledit support (130) et apte à coulisser en translation avec ledit support (130) pour actionner ledit mécanisme d'avance. 13/ Instrument d'écriture selon les revendications 12 et 5 prises en combinaison, dans lequel la projection avant (135) du support (130) ainsi que la surface externe de guidage (133) du support (130) sont essentiellement cylindriques, et le diamètre (D 133) de ladite surface externe de guidage (133) est supérieur au diamètre extérieur de ladite projection avant (135) en étant sensiblement égal au diamètre (D 120) de la paroi interne du fût ( 120).12 / Writing instrument according to any one of claims 1 to 6, comprising a mechanism for advancing a writing cartridge, wherein the support (130) of rubber is integrally connected to a reservoir tube (110) said cartridge disposed within the barrel (120) coaxially with said support (130) and slidable in translation with said holder (130) for actuating said feed mechanism. 13 / writing instrument according to claims 12 and 5 taken in combination, wherein the front projection (135) of the support (130) and the outer guide surface (133) of the support (130) are substantially cylindrical, and the diameter (D 133) of said outer guide surface (133) is greater than the outer diameter of said front projection (135) being substantially equal to the diameter (D 120) of the inner wall of the barrel (120).
14/ Instrument d'écriture selon la revendication 13, dans lequel ledit au moins un premier organe de guidage longitudinal (131) est formé par une protubérance saillante extérieurement sur ladite surface externe de guidage (133) du support (130), et un dit premier organe de guidage complémentaire longitudinal (121) est formé par une fente longitudinale formée dans le fût (120), ladite fente (121) débouchant sur l'extrémité arrière (125) du fût et étant adaptée pour permettre un coulissement en translation de ladite protubérance (131) sans possibilité de rotation.The writing implement of claim 13, wherein said at least one first longitudinal guide member (131) is formed by a projection protruding externally on said outer guide surface (133) of the support (130), and a said first longitudinal complementary guide member (121) is formed by a longitudinal slot formed in the barrel (120), said slot (121) opening on the rear end (125) of the barrel and being adapted to allow sliding in translation of said protuberance (131) without the possibility of rotation.
15/ Instrument d'écriture selon l'une quelconque des revendications 2 à15 / Writing instrument according to any one of claims 2 to
6 et 12 à 14, dans lequel le tut (120) présente une paroi extérieure essentiellement cylindrique et comprend une projection arrière (124) dont le diamètre extérieur est inférieur au diamètre extérieur du fût, de façon à ce que la surface extérieure du fût forme un épaulement annulaire (122) constituant lesdits moyens de butée aptes à coopérer avec un bord d'extrémité avant (155) du manchon, la portion avant (154) du manchon (150) présentant un diamètre intérieur (D 154) sensiblement égal au diamètre extérieur de ladite projection arrière (124).6 and 12 to 14, wherein the tut (120) has a substantially cylindrical outer wall and comprises a rear projection (124) whose outer diameter is smaller than the outer diameter of the barrel, so that the outer surface of the barrel forms an annular shoulder (122) constituting said abutment means adapted to cooperate with a front end edge (155) of the sleeve, the front portion (154) of the sleeve (150) having an inside diameter (D 154) substantially equal to the diameter outside of said rear projection (124).
16/ Instrument d'écriture selon l'une quelconque des revendications 1 à 6 et 12 à 15, dans lequel le manchon (150) est formé par l'assemblage de deux parties respectivement avant (150B) et arrière (150A) présentant des surfaces internes de guidage (153) de même diamètre (D 153), chaque surface interne de guidage (153) étant adjacente à la surface externe de guidage (133) du support (130) de gomme et présentant au moins un bord constituant un chemin de came (152Al, 152A2 ; 152Bl, 152B2), les chemins de came respectifs des deux parties (150A, 150B) du manchon étant conformés de telle sorte qu'une gorge (152) est créée délimitée par deux chemins de came en vis-à-vis longitudinalement une fois les deux parties (150A, 150B) assemblées, chaque gorge (152) constituant un dit deuxième organe de guidage complémentaire.16 / writing instrument according to any one of claims 1 to 6 and 12 to 15, wherein the sleeve (150) is formed by the assembly of two parts respectively front (150B) and rear (150A) having surfaces internal guides (153) of the same diameter (D 153), each inner guide surface (153) being adjacent to the outer guide surface (133) of the gum carrier (130) and having at least one edge constituting a path of cam (152A1, 152A2; 152B1, 152B2), the respective cam paths of the two sleeve portions (150A, 150B) being shaped such that a groove (152) is created delimited by two cam paths to -vis longitudinally once the two parts (150A, 150B) assembled, each groove (152) constituting a said second complementary guide member.
17/ Instrument d'écriture selon la revendication 16, dans lequel la partie arrière (150A) du manchon (150) présente une ouverture avant essentiellement circulaire d'un certain diamètre (D152) et la partie avant (150B) du manchon (150) présente une projection arrière (158) comportant au moins un dit chemin de came (152Bl, 152B2), ladite projection arrière (158) présentant une surface extérieure (159) définissant un cylindre dont le diamètre (D159) est sensiblement égal au diamètre (D 152) de ladite ouverture avant de la partie arrière (150A) du manchon (150), pour permettre un emmanchement avec friction de ladite projection arrière (158) dans la partie arrière (150A) du manchon (150).The writing instrument of claim 16, wherein the rear portion (150A) of the sleeve (150) has a substantially circular front opening of a certain diameter (D152) and the front portion (150B) of the sleeve (150). has a rear projection (158) having at least one said cam path (152B1, 152B2), said rear projection (158) having an outer surface (159) defining a cylinder whose diameter (D159) is substantially equal to the diameter (D 152) of said front opening of the rear portion (150A) of the sleeve (150) to frictionally engage said rear projection (158) in the rear portion (150A) of the sleeve (150).
18/ Instrument d'écriture selon l'une quelconque des revendications 16 et 17, dans lequel la partie arrière (150A) du manchon (150) comporte deux chemins de came (152Al, 152A2) sensiblement hélicoïdaux et symétriques entre eux par rapport à un axe longitudinal, chaque chemin de came (152Al, 152A2) s 'étendant angulairement entre un premier élément de positionnement angulaire (157A1) et un second élément de positionnement angulaire (157A2) diamétralement opposés et formés par des projections à l'avant de la surface interne de guidage (153) de ladite partie arrière (150A), et dans lequel la partie avant (150B) du manchon (150) comporte deux chemins de came (152Bl, 152B2) sensiblement hélicoïdaux et symétriques entre eux par rapport à un axe longitudinal entre lesquels sont ménagées deux fentes (157Bl, 157B2) diamétralement opposées destinées à recevoir lesdits premier et second éléments de positionnement angulaire (157A1,157A2).18 / Writing instrument according to any one of claims 16 and 17, wherein the rear portion (150A) of the sleeve (150) has two cam tracks (152Al, 152A2) substantially helical and symmetrical to each other with respect to a longitudinal axis, each cam path (152Al, 152A2) is extending angularly between a first angular positioning member (157A1) and a second angular positioning member (157A2) diametrically opposed and formed by projections in front of the inner guide surface (153) of said rear portion (150A), and wherein the front portion (150B) of the sleeve (150) has two cam paths (152B1, 152B2) substantially helical and symmetrical to each other with respect to a longitudinal axis between which are formed two diametrically opposed slots (157B1, 157B2) for receiving said first and second angular positioning members (157A1,157A2).
19/ Instrument d'écriture selon l'une quelconque des revendications 12 à 18, dans lequel le support (130) de gomme est réalisé en une seule pièce tubulaire avec le tube réservoir (110) de la cartouche d'écriture. 19 / writing instrument according to any one of claims 12 to 18, wherein the support (130) of rubber is made in one piece tubular with the reservoir tube (110) of the writing cartridge.
EP09703407A 2008-01-16 2009-01-09 Writing instrument with eraser protected by a sleeve Withdrawn EP2234818A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17193457.3A EP3284614A1 (en) 2008-01-16 2009-01-09 Writing instrument with eraser protected by a sleeve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0850257A FR2926244B1 (en) 2008-01-16 2008-01-16 WRITING INSTRUMENT PROVIDED WITH A GUM PROTECTED BY A SLEEVE
PCT/FR2009/050031 WO2009092947A2 (en) 2008-01-16 2009-01-09 Writing instrument with eraser protected by a sleeve

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP17193457.3A Division EP3284614A1 (en) 2008-01-16 2009-01-09 Writing instrument with eraser protected by a sleeve

Publications (1)

Publication Number Publication Date
EP2234818A2 true EP2234818A2 (en) 2010-10-06

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EP09703407A Withdrawn EP2234818A2 (en) 2008-01-16 2009-01-09 Writing instrument with eraser protected by a sleeve
EP17193457.3A Withdrawn EP3284614A1 (en) 2008-01-16 2009-01-09 Writing instrument with eraser protected by a sleeve

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US (1) US8915663B2 (en)
EP (2) EP2234818A2 (en)
JP (1) JP2011509848A (en)
CN (1) CN101970248B (en)
FR (1) FR2926244B1 (en)
WO (1) WO2009092947A2 (en)

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Also Published As

Publication number Publication date
WO2009092947A2 (en) 2009-07-30
US8915663B2 (en) 2014-12-23
WO2009092947A3 (en) 2009-10-08
EP3284614A1 (en) 2018-02-21
US20100316431A1 (en) 2010-12-16
CN101970248B (en) 2012-05-30
JP2011509848A (en) 2011-03-31
CN101970248A (en) 2011-02-09
FR2926244A1 (en) 2009-07-17
FR2926244B1 (en) 2010-02-19

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