EP2705960A1 - Ergonomic, versatile writing instrument - Google Patents

Ergonomic, versatile writing instrument Download PDF

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Publication number
EP2705960A1
EP2705960A1 EP13183648.8A EP13183648A EP2705960A1 EP 2705960 A1 EP2705960 A1 EP 2705960A1 EP 13183648 A EP13183648 A EP 13183648A EP 2705960 A1 EP2705960 A1 EP 2705960A1
Authority
EP
European Patent Office
Prior art keywords
writing instrument
grip
writing
segment
rear body
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.)
Granted
Application number
EP13183648.8A
Other languages
German (de)
French (fr)
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EP2705960B1 (en
Inventor
David Boisdevesys
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BIC SA
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BIC SA
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Publication date
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Publication of EP2705960A1 publication Critical patent/EP2705960A1/en
Application granted granted Critical
Publication of EP2705960B1 publication Critical patent/EP2705960B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K3/00—Nib holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/008—Holders comprising finger grips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
    • B43K24/023—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions with a deformable barrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
    • B43K24/06—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by turning means

Definitions

  • the present invention relates to the field of writing instruments, and more particularly their ergonomics.
  • writing instrument means any instrument that can be used to manually trace a writing on a suitable surface.
  • the writing instruments it is possible to count, for example, pencils, feathers, ballpoint pens or markers, and even adapted pens. All of these writing instruments typically have an elongated shape allowing a front portion of the writing instrument to be grasped between the tips of the thumb and at least one of the index and middle finger, while a back portion is supported in the grip angle between the thumb and index finger to stabilize the writing instrument in the hand.
  • various writing instruments with ergonomic forms have been proposed.
  • Some of these ergonomic writing instruments such as the one disclosed in the international patent application WO 01/97653 , a front body with an asymmetrical ergonomic grip segment with respect to a first longitudinal plane, and an asymmetrical rear body with respect to a second longitudinal plane, different from the first longitudinal plane.
  • the gripping segment is thus adapted to grip between the fingertips, while the asymmetry of the rear body makes it possible to better match the shape of the grip angle, that is to say the space between the thumb and the index finger of a hand.
  • the present invention aims to remedy these disadvantages.
  • the invention aims at providing a writing instrument comprising a front body with an asymmetrical ergonomic grip segment with respect to a first longitudinal plane, and an asymmetric rear body with respect to a second longitudinal plane, but which allows its use with either your right or left hand.
  • this object is achieved by virtue of the fact that the rear body is rotatable relative to the front body about a longitudinal axis corresponding to a line of intersection between the first longitudinal plane and the longitudinal axis. second longitudinal plane, between a position adapted to a grip with a right hand and a position adapted to a grip with a left hand.
  • the shape of the writing instrument can be adapted to ergonomic use alternately with the left hand or with the right hand, so that the ergonomics of this instrument is no longer in conflict with its versatility .
  • the ergonomic gripping segment In order to separate the index finger and the thumb on the ergonomic gripping segment, it can have, on one side of said first longitudinal plane, a rib oriented longitudinally, and radially projecting with respect to a gripping surface of said segment.
  • this rib can be protruding at least 2 mm from the gripping surface of said segment. This rib can facilitate the learning of writing, helping schoolchildren to correctly position the fingers on the ergonomic grip segment. In addition, it also provides a more stable grip of the writing instrument.
  • the ergonomic gripping segment may furthermore have a finger-stop flange towards a front end of the front body, for example at a distance of at least 10 mm from this distal end, so as to ensure a sufficient distance fingers in relation to the writing surface, in order to clear the field of view of the user which is not only advantageous during the learning of writing to schoolchildren, but also makes it more comfortable to other users.
  • this flange can in particular be inclined relative to the longitudinal axis.
  • said ergonomic grip segment may furthermore have a flexible gripping surface, preferably overmolded on the front body.
  • the rear body may comprise, on one side of said second longitudinal plane, a concave surface configured to bear on the base of the index finger.
  • this writing instrument may further comprise a writing tip, and a mechanism for retraction and extension of the writing tip, actuated by relative rotation of the front body and the rear body, and configured so that the writing tip is retracted into the front body when the rear body and the front body are in an intermediate position between the position adapted to the grip with the right hand and the position adapted to the grip with the left hand, and protruding beyond a front end of the front body when the rear body and the front body are in the position adapted to grip with the right hand or in the position adapted to the pr ise with the left hand.
  • the act of turning the rear body relative to the front body to adapt it to use with the right hand or the left hand will simultaneously serve to move the writing tip to its projecting position, in which the instrument It will be
  • this retraction and extension mechanism may comprise a cam surface, integral in rotation with one of said front body and rear body and an element rotatably secured to the other of said front body and rear body and in contact with said cam surface, the cam surface or said element in contact with the cam surface being able to move in the writing instrument along said longitudinal axis and being integral with the writing tip at least in translation along the longitudinal axis.
  • the cam surface thus makes it possible to convert the rotational movement between the front and rear bodies into a translation movement of the writing tip along the longitudinal axis.
  • this cam surface may be symmetrical.
  • the retraction and extension mechanism may also include an elastic member installed to urge the second member against the cam surface.
  • Another aspect of the present invention relates to the assembly of the writing instrument.
  • a screw connection does not seem suitable.
  • this writing instrument may further comprise a tubular part joining axially, it is that is, in the direction of the longitudinal axis, the front body and the rear body snap elastically. Snapping (or clipping) is a method of assembling two parts by engagement and elastic deformation (generally local deformation, for example of a tongue).
  • this tubular piece may have shoulders opposed to corresponding shoulders of the front and rear bodies to axially retain said tubular piece relative to the front and rear bodies.
  • the tubular piece may have a certain radial elasticity to allow snapping, its radial shoulders bearing against those of the front body and the rear body after resilient expansion to retain them axially. This tubular piece can in particular be received in the writing instrument, thus allowing an invisible connection between the front body and the rear body.
  • the tubular piece may be integral in rotation with one of said front and rear bodies and have two abutments in rotation relative to each other of said front and rear bodies. Thus, this piece can be used to limit the relative rotation between the two bodies.
  • this elastic piece may comprise a longitudinal slot.
  • it can also receive, in this longitudinal slot, a rib integral with one of said front or rear body.
  • the longitudinal slot can thus also serve to lock the tubular piece in rotation with respect to one of said front or rear body.
  • the rib can be engaged by force in the longitudinal slot, so as to cause the radial expansion of the tubular piece and the engagement of the tubular piece with internal shoulders in at least one of the front or rear body to ensure the axial connection between the front and rear bodies through the tubular piece.
  • the present invention also relates to a method of using this writing instrument, wherein the ergonomic grip segment is held between the tips of the thumb and at least one of the index and middle fingers of the same hand, and the rear body is rotated relative to the front body to the position adapted to a grip with a right hand or to the position adapted to a grip with a left hand according to the hand used, so as to ensure the support of the rear body in the gripping angle between the index finger and the thumb.
  • This writing instrument 1 which in the illustrated embodiment takes more specifically the form of a ballpoint pen, comprises a front body 2 and a rear body 3 which can rotate, relative to each other, around a longitudinal axis X.
  • the front body 2 comprises two parts: an ergonomic grip segment 4 and a tip 5 forming a distal end of the front body 2.
  • the segment 4 is asymmetrical with respect to a longitudinal plane A, since it has, in particular, on one side only of this longitudinal plane A, a rib 6 radially projecting. When using the instrument 1, this rib 6 functions as a key to facilitate the decision by separating the thumb of the index finger.
  • the segment 4 also has a flange 7 radially projecting, opposing the fingers in the direction of the front end of the front body 2, and also facilitating in this way the catch of the index fingers and major and thumb around the segment 4. In the illustrated embodiment, this flange 7 is inclined in the axial direction for a better setting comfort of the segment 4.
  • the segment 4 also has a grip surface 8 overmoulded, a softer material than the rest of the segment 4.
  • This surface grip 8 slightly concave, may also have a texture in relief or protruding for a more certain grip.
  • the tip 5 has a conical outer surface and a complementary thread of an internal thread inside the segment 4 for attachment to the front end of the segment 4.
  • the rear body 3 is asymmetrical with respect to a longitudinal plane B, since it has in particular, on one side of this longitudinal plane B, a concave bearing surface 9 to facilitate the support of the rear body on the base of the index finger in the grip angle of the user's hand.
  • the index finger will be on one side or the other of the rib 6.
  • the body 3 can rotate relative to the front body 2, about the longitudinal axis X, between the position illustrated on the figure 2 , which is adapted for use with the right hand with the concave surface 9 to the right of the rib 6, and the position illustrated on the figure 3 , which is adapted for use with the left hand with the concave surface 9 to the left of the rib 6.
  • the instrument 1 can also adopt the intermediate position illustrated on the figure 1 , between the positions of Figures 2 and 3 in which the longitudinal plane A of the front body 2 coincides with the longitudinal plane B of the rear body 3.
  • the instrument 1 comprises a retractable writing tip 10, and a retraction mechanism and extension of this writing tip 10 which is actuable by relative rotation of the front body and rear body 2,3, and configured so that the writing tip 10 is retracted into the front body 2 when the front and rear bodies 2, 3 are in the intermediate position shown on the figure 1 , and protruding beyond the front end of the front body 2 when the front and rear bodies 2,3 are in the positions illustrated on the Figures 2 and 3 .
  • the angle of rotation ⁇ of the rear body 3 with respect to the front body 2, between the intermediate position illustrated on the figure 1 and each of the positions illustrated on the Figures 2 and 3 can be, for example, 120 °.
  • the figure 4 illustrates an exploded perspective of the instrument 1, to appreciate its internal components.
  • a resilient element 11 in the form of a helical spring, a standard ballpoint refill 12, a slide 13 and a tubular piece 14.
  • the refill 12 comprises the writing tip 10 and an ink tank 15 and is received within the slider 13, which is open forwards and at least partially closed towards the rear.
  • FIG 5 which is a cross section of the instrument 1 according to the VV plane of the figure 1 , ribs 16, 17 on the inner surface of the front body 2 cooperate with grooves 18, 19 on the outer surface of the slider 13, so as to make the slider 13 integral with the front body 2 in rotation around the longitudinal axis X, while permitting axial displacement of the slider 13 along the longitudinal axis X.
  • the slider 13 also has a finger 20 on its outer surface. As we can see on the figure 6 this finger 20 is in contact with a cam surface 21 formed in the inner surface of the rear body 3 and constitutes with it a mechanism for extending and retracting the writing tip 10.
  • the cam surface 21 has a contour helical adapted to push the finger 20 forward when the rear body 3 rotates in one or the other direction from the intermediate position illustrated on the figure 1 .
  • the finger 20 is connected to the writing tip 10 through the slider 13 and the refill 12
  • the rotation of the rear body 3 in one or the other direction about the longitudinal axis X with respect to the front body 2 will actuate the movement of the writing tip 10 between its retracted position, illustrated in FIG. figure 6 , and its writing position, illustrated on the figure 7 .
  • the writing tip 10 is received in the front body 2, and more specifically, in the illustrated embodiment, in the mouthpiece 5. In the writing position, illustrated in FIG. figure 7 the writing tip 10 protrudes beyond the front end of the front body 2.
  • the cam surface 21 is more clearly visible on the Figures 8 and 9 , illustrating, respectively, a partial cutaway of the rear body 3, and a partial longitudinal section along an IX-IX plane perpendicular to the plane B.
  • the cam surface 21 is symmetrical with respect to the longitudinal plane B , so as to actuate the same extension movement of the writing tip 10 when the rear body 3 is rotated in either direction from the intermediate position illustrated on the figures 3 and 6 .
  • this cam surface has, on each side, a notch 22 at the end of stroke intended to hook the finger 20 and thus block the writing tip 10 in its writing position.
  • each notch 22 is such that it offers only a slight resistance to the rotation of the rear body 3 when the user rotates it, relative to the front body 2 from this position to its intermediate position to retract the writing tip 10 into the front body 2.
  • the rear body 3 also comprises, on its inner surface, radial shoulders 24 and a longitudinal rib 25 intended to cooperate with the tubular part 14.
  • the segment 4 also has, on its rear end, lips 26, 27 intended to cooperate with the tubular piece 14, as well as a rotation stop 28.
  • This tubular piece 14 is illustrated in greater detail on the Figures 12 to 14 . In these figures, one can appreciate how it has a longitudinal slot 29. On the one hand, thanks to this longitudinal slot, the tubular member 14 is more easily elastically deformable in a radial plane.
  • this slot 29 is adapted to receive the rib 25 of the rear body 3, so as to cooperate with it to make the tubular part 14 integral with the rear body in rotation, as shown in particular on the figure 5 .
  • the width of the slot 29 when the tubular piece 14 is free of stresses is however less than that of the rib 25, so that when the rib 25 is inserted into the slot 29, it causes the radial expansion of the piece.
  • tubular 14 On the Figures 12 to 14 it can also be appreciated how the tubular member 14 has radial shoulders 30 on its outer surface.
  • the rear edge 31 of the tubular part 14 also forms a radial shoulder against which the lips 26, 27 of the segment 4 rest to thus axially retain the front body 2 by resilient snapping, without, however, preventing its rotation relative to the tubular part 14. and rear body 3.
  • the tubular piece 14 also has axial protuberances on its front edge 32, forming stops 33 in rotation, which abut against the corresponding stop 28 of the front body 2 to limit the relative rotation of the rear body 3 relative to the front body 2.
  • the tubular piece 14 axially connects the front body 2 and the rear body 3, and limits their relative rotation between the positions illustrated in the drawings. Figures 2 and 3 .
  • the slide 13 is introduced at the rear of the segment 4, and the tubular piece 14 is threaded, thanks to its radial elasticity, on the rear end of the segment 4 until its rear edge 31 can bear on the front faces of the lips 26. Then, the rear end of the segment 4, with the tubular piece 14 and the slider 13 is introduced into the rear body 3, with the slot 29 of the tubular piece 14 aligned with the rib 25 of the rear body 3, and the grooves 18, 19 of the slider 13 aligned with the ribs 16, 17 corresponding on the internal surface of the segment 4.
  • the rear end of the segment 4 and the tubular part 14 can penetrate into the front end of the rear body until the force engagement of the rib 25 in the slot 29 causes the radial expansion of the tubular member 14, so that its radial shoulders 30 rest on the radial shoulders 24 of the rear body 3 to axially block the segment 4 relative to the rear body 2.
  • the refill 12 and the spring 11 can then be introduced into the instrument 1 through the front end of the segment 4 , which can then be closed with the nozzle 5 to complete the front body 2 and the instrument 1. Subsequently, the refill 12 can be easily replaced by unscrewing the nozzle 5, without having to separate the entire front body 2 of the rear body 3.

Abstract

The instrument (1) has a front body (2) comprising an ergonomic grasping asymmetrical segment (4) formed relative to a longitudinal plane (A) and an asymmetrical rear body (3) formed relative to another longitudinal plane (B). The rear body rotates relative to front body about longitudinal axis corresponding to line of intersection between position adapted to gripping with right hand and other position adapted to gripping with left hand. The line is formed between the planes. The segment has a rib (6) oriented longitudinally and radially projected relative to a grasping surface (8) of segment. An independent claim is also included for a method for using a writing instrument.

Description

La présente invention concerne le domaine des instruments d'écriture, et plus particulièrement leur ergonomie.The present invention relates to the field of writing instruments, and more particularly their ergonomics.

On entend par « instrument d'écriture », dans le présent contexte, tout instrument pouvant servir à tracer manuellement une écriture sur une surface adaptée. Ainsi, parmi les instruments d'écriture, on peut compter par exemple les crayons, plumes, stylos à bille ou feutres, et même les stylets adaptés. Tous ces instruments d'écriture ont typiquement une forme allongée permettant la prise d'une partie avant de l'instrument d'écriture entre les bouts du pouce et d'au moins un des doigts index et majeur, pendant qu'une partie arrière est soutenue dans l'angle de préhension entre le pouce et le doigt index pour stabiliser l'instrument d'écriture dans la main. Afin de faciliter cette prise, notamment pour les écoliers pendant leur apprentissage de l'écriture, des différents instruments d'écriture présentant des formes ergonomiques ont été proposés.In the present context, the term "writing instrument" means any instrument that can be used to manually trace a writing on a suitable surface. Thus, among the writing instruments, it is possible to count, for example, pencils, feathers, ballpoint pens or markers, and even adapted pens. All of these writing instruments typically have an elongated shape allowing a front portion of the writing instrument to be grasped between the tips of the thumb and at least one of the index and middle finger, while a back portion is supported in the grip angle between the thumb and index finger to stabilize the writing instrument in the hand. To facilitate this, especially for schoolchildren during their learning of writing, various writing instruments with ergonomic forms have been proposed.

Certains de ces instruments d'écriture ergonomiques, comme par exemple celui divulgué dans la demande de brevet internationale WO 01/97653 , un corps avant avec un segment de préhension ergonomique asymétrique par rapport à un premier plan longitudinal, et un corps arrière asymétrique par rapport à un deuxième plan longitudinal, différent du premier plan longitudinal. Le segment de préhension est ainsi adapté à la prise entre les bouts des doigts, tandis que l'asymétrie du corps arrière permet de mieux épouser la forme de l'angle de préhension, c'est-à-dire l'espace entre le pouce et le doigt index d'une main.Some of these ergonomic writing instruments, such as the one disclosed in the international patent application WO 01/97653 , a front body with an asymmetrical ergonomic grip segment with respect to a first longitudinal plane, and an asymmetrical rear body with respect to a second longitudinal plane, different from the first longitudinal plane. The gripping segment is thus adapted to grip between the fingertips, while the asymmetry of the rear body makes it possible to better match the shape of the grip angle, that is to say the space between the thumb and the index finger of a hand.

Toutefois, un inconvénient de tels instruments d'écriture ergonomiques est que, par leur asymétrie, ils ne peuvent être adaptés qu'à l'usage avec la main gauche ou la main droite. Des instruments différents doivent donc être produits pour les droitiers et pour les gauchers, avec tout ce que cela implique en termes de coût de production et de stockage, ainsi que d'inconvénients pour les utilisateurs.However, a disadvantage of such ergonomic writing instruments is that, by their asymmetry, they can be adapted only for use with the left hand or the right hand. Different instruments must therefore be produced for right-handers and left-handers, with all that this implies in terms of cost of production and storage, as well as disadvantages for users.

Objet et résumé de l'inventionObject and summary of the invention

La présente invention vise à remédier à ces inconvénients. En particulier, l'invention vise à proposer un instrument d'écriture comportant un corps avant avec un segment de préhension ergonomique asymétrique par rapport à un premier plan longitudinal, et un corps arrière asymétrique par rapport à un deuxième plan longitudinal, mais qui permette son usage avec, au choix, la main droite ou la main gauche.The present invention aims to remedy these disadvantages. In particular, the invention aims at providing a writing instrument comprising a front body with an asymmetrical ergonomic grip segment with respect to a first longitudinal plane, and an asymmetric rear body with respect to a second longitudinal plane, but which allows its use with either your right or left hand.

Dans au moins un mode de réalisation, ce but est atteint grâce au fait que le corps arrière est apte à tourner, par rapport au corps avant, autour d'un axe longitudinal correspondant à une ligne d'intersection entre le premier plan longitudinal et le deuxième plan longitudinal, entre une position adaptée à une prise avec une main droite et une position adaptée à une prise avec une main gauche.In at least one embodiment, this object is achieved by virtue of the fact that the rear body is rotatable relative to the front body about a longitudinal axis corresponding to a line of intersection between the first longitudinal plane and the longitudinal axis. second longitudinal plane, between a position adapted to a grip with a right hand and a position adapted to a grip with a left hand.

Grâce à ces dispositions, la forme de l'instrument d'écriture peut être adaptée à un usage ergonomique alternativement avec la main gauche ou avec la main droite, de telle manière que l'ergonomie de cet instrument ne soit plus en conflit avec sa versatilité.Thanks to these arrangements, the shape of the writing instrument can be adapted to ergonomic use alternately with the left hand or with the right hand, so that the ergonomics of this instrument is no longer in conflict with its versatility .

Afin de séparer l'index et le pouce sur le segment de préhension ergonomique, celui-ci peut présenter, d'un seul côté dudit premier plan longitudinal, une nervure orientée longitudinalement, et radialement saillante par rapport à une surface de préhension dudit segment. En particulier, cette nervure peut être saillante d'au moins 2 mm par rapport à la surface de préhension dudit segment. Cette nervure peut ainsi faciliter l'apprentissage de l'écriture, aidant les écoliers à positionner correctement les doigts sur le segment de préhension ergonomique. En outre, elle assure aussi une prise plus stable de l'instrument d'écriture.In order to separate the index finger and the thumb on the ergonomic gripping segment, it can have, on one side of said first longitudinal plane, a rib oriented longitudinally, and radially projecting with respect to a gripping surface of said segment. In particular, this rib can be protruding at least 2 mm from the gripping surface of said segment. This rib can facilitate the learning of writing, helping schoolchildren to correctly position the fingers on the ergonomic grip segment. In addition, it also provides a more stable grip of the writing instrument.

Le segment de préhension ergonomique peut en outre présenter une collerette d'arrêt des doigts en direction d'une extrémité avant du corps avant, par exemple à une distance d'au moins 10 mm de cette extrémité distale, de manière à assurer un écart suffisant des doigts par rapport à la surface d'écriture, cela à fin de dégager le champ de vision de l'utilisateur ce qui est non seulement avantageux pendant l'apprentissage de l'écriture aux écoliers, mais la rend aussi plus confortable à d'autres utilisateurs. Pour une meilleure ergonomie, cette collerette peut notamment être inclinée par rapport à l'axe longitudinal.The ergonomic gripping segment may furthermore have a finger-stop flange towards a front end of the front body, for example at a distance of at least 10 mm from this distal end, so as to ensure a sufficient distance fingers in relation to the writing surface, in order to clear the field of view of the user which is not only advantageous during the learning of writing to schoolchildren, but also makes it more comfortable to other users. For better ergonomics, this flange can in particular be inclined relative to the longitudinal axis.

Afin aussi de rendre la prise de l'instrument d'écriture plus confortable, ledit segment de préhension ergonomique peut présenter en outre une surface de préhension souple, de préférence surmoulée sur le corps avant.In order also to make the grip of the writing instrument more comfortable, said ergonomic grip segment may furthermore have a flexible gripping surface, preferably overmolded on the front body.

Afin de mieux stabiliser l'instrument d'écriture dans l'angle de préhension de la main, le corps arrière peut comporter, d'un seul côté dudit deuxième plan longitudinal, une surface concave configurée pour prendre appui sur la base du doigt index.In order to better stabilize the writing instrument in the gripping angle of the hand, the rear body may comprise, on one side of said second longitudinal plane, a concave surface configured to bear on the base of the index finger.

Il est généralement connu d'équiper les instruments d'écriture d'une pointe d'écriture rétractable, permettant ainsi d'escamoter la pointe d'écriture, notamment quand l'instrument n'est pas utilisé, pour ainsi éviter les taches, l'assèchement de la pointe d'écriture, etc. Parmi les différents mécanismes utilisés pour la rétraction et l'extension de la pointe d'écriture, la personne du métier connaît notamment des mécanismes actionnables par rotation relative de deux parties de l'instrument d'écriture.It is generally known to equip the writing instruments with a retractable writing tip, thus making it possible to retract the writing tip, in particular when the instrument is not in use, thus avoiding stains. drying of the writing tip, etc. Among the various mechanisms used for retraction and extension of the writing tip, the person skilled in the art knows, in particular, mechanisms that can be actuated by relative rotation of two parts of the writing instrument.

Si l'instrument d'écriture comporte un corps avant et un corps arrière pouvant tourner relativement l'un par rapport à l'autre, autour d'un axe longitudinal, entre une position adaptée à une prise avec une main droite et une position adaptée à une prise avec une main gauche, cet instrument d'écriture pourra comporter, en outre, une pointe d'écriture, et un mécanisme de rétraction et d'extension de la pointe d'écriture, actionnable par rotation relative du corps avant et le corps arrière, et configuré de manière à ce que la pointe d'écriture soit escamotée dans le corps avant quand le corps arrière et le corps avant sont dans une position intermédiaire entre la position adaptée à la prise avec la main droite et la position adaptée à la prise avec la main gauche, et en saillie au-delà d'une extrémité avant du corps avant quand le corps arrière et le corps avant sont dans la position adaptée à la prise avec la main droite ou dans la position adaptée à la prise avec la main gauche. Ainsi, l'acte de tourner le corps arrière par rapport au corps avant pour l'adapter à l'usage avec la main droite ou la main gauche servira simultanément à déplacer la pointe d'écriture vers sa position saillante, dans laquelle l'instrument d'écriture va pouvoir être utilisé.If the writing instrument has a front body and a rear body that is relatively rotatable relative to one another about a longitudinal axis, between a position adapted to a grip with a right hand and a suitable position to a grip with a left hand, this writing instrument may further comprise a writing tip, and a mechanism for retraction and extension of the writing tip, actuated by relative rotation of the front body and the rear body, and configured so that the writing tip is retracted into the front body when the rear body and the front body are in an intermediate position between the position adapted to the grip with the right hand and the position adapted to the grip with the left hand, and protruding beyond a front end of the front body when the rear body and the front body are in the position adapted to grip with the right hand or in the position adapted to the pr ise with the left hand. Thus, the act of turning the rear body relative to the front body to adapt it to use with the right hand or the left hand will simultaneously serve to move the writing tip to its projecting position, in which the instrument It will be possible to use writing

En particulier, ce mécanisme de rétraction et d'extension peut comprendre une surface de came, solidaire en rotation de l'un desdits corps avant et corps arrière et un élément solidaire en rotation de l'autre desdits corps avant et corps arrière et en contact avec ladite surface de came, la surface de came ou ledit élément en contact avec la surface de came étant apte à se déplacer dans l'instrument d'écriture suivant ledit axe longitudinal et étant solidaire de la pointe d'écriture au moins en translation suivant l'axe longitudinal. La surface de came permet ainsi la conversion du mouvement de rotation entre les corps avant et arrière en un mouvement de translation de la pointe d'écriture suivant l'axe longitudinal. Afin d'assurer le même mouvement d'extension de la pointe d'écriture lors de la rotation dans chaque sens à partir de ladite position intermédiaire, cette surface de came peut être symétrique. En outre, pour assurer le contact de la deuxième pièce contre la surface de came, le mécanisme de rétraction et d'extension peut comporter aussi un élément élastique installé de manière à pousser la deuxième pièce contre la surface de came.In particular, this retraction and extension mechanism may comprise a cam surface, integral in rotation with one of said front body and rear body and an element rotatably secured to the other of said front body and rear body and in contact with said cam surface, the cam surface or said element in contact with the cam surface being able to move in the writing instrument along said longitudinal axis and being integral with the writing tip at least in translation along the longitudinal axis. The cam surface thus makes it possible to convert the rotational movement between the front and rear bodies into a translation movement of the writing tip along the longitudinal axis. In order to ensure the same extension movement of the writing tip during rotation in each direction from said intermediate position, this cam surface may be symmetrical. In addition, to ensure contact of the second member against the cam surface, the retraction and extension mechanism may also include an elastic member installed to urge the second member against the cam surface.

Un autre aspect de la présente invention concerne l'assemblage de l'instrument d'écriture. Comme le corps avant et le corps arrière vont être fréquemment tournés l'un par rapport à l'autre dans les deux sens de rotation autour de l'axe longitudinal pendant la durée de vie de l'instrument d'écriture, une connexion par vissage ne semble pas adaptée. Afin de fournir néanmoins une connexion solide, facile à mettre en oeuvre industriellement, et permettant une rotation relative des corps avant et arrière autour de l'axe longitudinal, cet instrument d'écriture peut comprendre en outre une pièce tubulaire joignant axialement, c'est-à-dire, dans la direction de l'axe longitudinal, le corps avant et le corps arrière par encliquetage élastique. L'encliquetage (ou clipsage) est un mode d'assemblage de deux parties par engagement et déformation élastique (en général déformation locale, par exemple d'une languette). Lorsque les deux parties sont engagées dans la position d'encliquetage, les parties ont généralement repris leur forme initiale et ne présente plus de déformation élastique (ou une déformation élastique moindre). Lorsque les deux parties sont engagées l'une avec l'autre dans la position d'encliquetage, elles coopèrent l'une avec l'autre de manière à s'opposer, voire bloquer, les mouvements relatifs desdites pièces dans le sens du dégagement (sens opposé au sens de l'engagement). En position d'encliquetage, les deux parties peuvent en outre coopérer de manière à s'opposer, voire bloquer, leurs mouvements relatifs dans le sens du prolongement de l'engagement, au-delà de la position d'encliquetage. En particulier, cette pièce tubulaire peut présenter des épaulements opposés à des épaulements correspondants des corps avant et arrière pour retenir axialement ladite pièce tubulaire par rapport aux corps avant et arrière. Cette configuration simplifie l'assemblage mécanique de l'instrument d'écriture, qui peut ainsi être assemblé par simple engagement axial des corps avant et arrière, en directions opposées, contre la pièce tubulaire. La pièce tubulaire peut présenter une certaine élasticité radiale afin de permettre l'encliquetage, ses épaulements radiaux venant en appui contre ceux du corps avant et du corps arrière après sa détente élastique pour les retenir axialement. Cette pièce tubulaire peut notamment être reçue dans l'instrument d'écriture, permettant ainsi une connexion non apparente entre le corps avant et le corps arrière.Another aspect of the present invention relates to the assembly of the writing instrument. As the front body and the rear body will be frequently rotated relative to each other in both directions of rotation about the longitudinal axis during the life of the writing instrument, a screw connection does not seem suitable. However, in order to provide a solid connection, easy to implement industrially, and allowing a relative rotation of the front and rear bodies around the longitudinal axis, this writing instrument may further comprise a tubular part joining axially, it is that is, in the direction of the longitudinal axis, the front body and the rear body snap elastically. Snapping (or clipping) is a method of assembling two parts by engagement and elastic deformation (generally local deformation, for example of a tongue). When both parts are engaged in the latching position, the parts have generally returned to their original shape and no longer exhibit elastic deformation (or less elastic deformation). When the two parts are engaged with each other in the latching position, they cooperate with each other so as to oppose, or even block, the relative movements of said parts in the direction of disengagement ( opposite meaning to the meaning of the commitment). In the latching position, the two parts can also cooperate to oppose or block, their relative movements in the direction of the extension of the engagement, beyond the latching position. In particular, this tubular piece may have shoulders opposed to corresponding shoulders of the front and rear bodies to axially retain said tubular piece relative to the front and rear bodies. This configuration simplifies the mechanical assembly of the writing instrument, which can thus be assembled by simple axial engagement of the front and rear bodies, in opposite directions, against the tubular piece. The tubular piece may have a certain radial elasticity to allow snapping, its radial shoulders bearing against those of the front body and the rear body after resilient expansion to retain them axially. This tubular piece can in particular be received in the writing instrument, thus allowing an invisible connection between the front body and the rear body.

La pièce tubulaire peut être solidaire en rotation de l'un desdits corps avant et arrière et présenter deux butées en rotation par rapport à l'autre desdits corps avant et arrière. Ainsi, cette pièce peut servir à limiter la rotation relative entre les deux corps.The tubular piece may be integral in rotation with one of said front and rear bodies and have two abutments in rotation relative to each other of said front and rear bodies. Thus, this piece can be used to limit the relative rotation between the two bodies.

Afin de faciliter l'encliquetage élastique, cette pièce élastique peut comporter une fente longitudinale. Dans ce cas, elle peut aussi recevoir, dans cette fente longitudinale, une nervure solidaire de l'un desdits corps avant ou arrière. La fente longitudinale peut ainsi servir aussi au blocage de la pièce tubulaire en rotation par rapport à l'un desdits corps avant ou arrière. En outre, la nervure peut être engagée à force dans la fente longitudinale, de manière à provoque l'expansion radiale de la pièce tubulaire et l'engagement de la pièce tubulaire avec des épaulements internes dans au moins l'un des corps avant ou arrière pour assurer la connexion axiale entre les corps avant et arrière à travers la pièce tubulaire.In order to facilitate elastic snapping, this elastic piece may comprise a longitudinal slot. In this case, it can also receive, in this longitudinal slot, a rib integral with one of said front or rear body. The longitudinal slot can thus also serve to lock the tubular piece in rotation with respect to one of said front or rear body. In addition, the rib can be engaged by force in the longitudinal slot, so as to cause the radial expansion of the tubular piece and the engagement of the tubular piece with internal shoulders in at least one of the front or rear body to ensure the axial connection between the front and rear bodies through the tubular piece.

La présente invention concerne également un procédé d'utilisation de cet instrument d'écriture, dans lequel le segment de préhension ergonomique est tenu entre les bouts du pouce et d'au moins un des doigts index et majeur d'une même main, et le corps arrière est tourné par rapport au corps avant vers la position adaptée à une prise avec une main droite ou vers la position adaptée à une prise avec une main gauche selon la main utilisée, de manière à assurer le support du corps arrière dans l'angle de préhension entre le doigt index et le pouce.The present invention also relates to a method of using this writing instrument, wherein the ergonomic grip segment is held between the tips of the thumb and at least one of the index and middle fingers of the same hand, and the rear body is rotated relative to the front body to the position adapted to a grip with a right hand or to the position adapted to a grip with a left hand according to the hand used, so as to ensure the support of the rear body in the gripping angle between the index finger and the thumb.

Brève description des dessinsBrief description of the drawings

L'invention sera bien comprise et ses avantages apparaîtront mieux, à la lecture de la description détaillée qui suit, d'un mode de réalisation représenté à titre d'exemple non limitatif. La description se réfère aux dessins annexés sur lesquels :

  • la figure 1 est une vue en perspective d'un instrument d'écriture suivant un mode de réalisation;
  • la figure 2 est une vue en perspective de l'instrument d'écriture de la figure 1 dans une position adaptée à l'usage avec la main droite ;
  • la figure 3 est une vue en perspective de l'instrument d'écriture des figures 1 et 2 dans une position adaptée à l'usage avec la main gauche ;
  • la figure 4 est une perspective éclatée de l'instrument d'écriture des figures précédentes ;
  • la figure 5 est une vue en coupe transversale de l'instrument d'écriture de la figure 1 dans le plan V-V ;
  • la figure 6 est une vue en coupe longitudinale de l'instrument d'écriture des figures précédentes dans la position de la figure 1 ;
  • la figure 7 est une vue en coupe longitudinale de l'instrument d'écriture des figures précédentes dans la position de la figure 3 ;
  • la figure 8 est une vue en écorché d'un corps arrière de l'instrument d'écriture des figures précédentes ;
  • la figure 9 est une vue en coupe longitudinale du corps arrière de la figure 8 suivant la ligne IX-IX ;
  • la figure 10 est une vue en coupe longitudinale d'un corps avant de l'instrument d'écriture des figures précédentes ;
  • la figure 11 est une vue arrière du corps avant de la figure 10;
  • la figure 12 est une vue du dessus d'une pièce tubulaire destiné à relier lesdits corps avant et arrière ;
  • la figure 13 est une vue en coupe longitudinale de la pièce tubulaire de la figure 12 suivant la ligne XIII-XIII ; et
  • la figure 14 est une vue en coupe longitudinale de la pièce tubulaire de la figure 13 suivant la ligne XIV-XIV.
The invention will be better understood and its advantages will appear better on reading the detailed description which follows, of an embodiment shown by way of non-limiting example. The description refers to the accompanying drawings in which:
  • the figure 1 is a perspective view of a writing instrument according to one embodiment;
  • the figure 2 is a perspective view of the writing instrument of the figure 1 in a position suitable for use with the right hand;
  • the figure 3 is a perspective view of the writing instrument of Figures 1 and 2 in a position adapted to use with the left hand;
  • the figure 4 is an exploded perspective of the writing instrument of the preceding figures;
  • the figure 5 is a cross-sectional view of the writing instrument of the figure 1 in the VV plane;
  • the figure 6 is a longitudinal sectional view of the writing instrument of the preceding figures in the position of the figure 1 ;
  • the figure 7 is a longitudinal sectional view of the writing instrument of the preceding figures in the position of the figure 3 ;
  • the figure 8 is a cutaway view of a rear body of the writing instrument of the preceding figures;
  • the figure 9 is a longitudinal sectional view of the rear body of the figure 8 along line IX-IX;
  • the figure 10 is a longitudinal sectional view of a front body of the writing instrument of the preceding figures;
  • the figure 11 is a back view of the body before the figure 10 ;
  • the figure 12 is a top view of a tubular piece for connecting said front and rear bodies;
  • the figure 13 is a longitudinal sectional view of the tubular part of the figure 12 along line XIII-XIII; and
  • the figure 14 is a longitudinal sectional view of the tubular part of the figure 13 along line XIV-XIV.

Description détaillée de l'inventionDetailed description of the invention

L'arrangement général d'un instrument d'écriture 1 est illustré sur les figures 1 à 3. Cet instrument d'écriture 1, qui dans le mode de réalisation illustré prend plus spécifiquement la forme d'un stylo à bille, comporte un corps avant 2 et un corps arrière 3 pouvant tourner, l'un par rapport à l'autre, autour d'un axe longitudinal X.The general arrangement of a writing instrument 1 is illustrated on the Figures 1 to 3 . This writing instrument 1, which in the illustrated embodiment takes more specifically the form of a ballpoint pen, comprises a front body 2 and a rear body 3 which can rotate, relative to each other, around a longitudinal axis X.

Le corps avant 2 comporte deux parties : un segment de préhension ergonomique 4 et un embout 5 formant une extrémité distale de ce corps avant 2. Le segment 4 est asymétrique par rapport à un plan longitudinal A, car il présente notamment, sur un seul côté de ce plan longitudinal A, une nervure 6 radialement saillante. Lors de l'utilisation de l'instrument 1, cette nervure 6 fonctionne comme détrompeur pour faciliter la prise en séparant le pouce de l'index. Le segment 4 présente également une collerette 7 radialement saillante, s'opposant aux doigts en direction de l'extrémité avant du corps avant 2, et facilitant aussi de cette manière la prise des doigts index et majeur et du pouce autour du segment 4. Dans le mode de réalisation illustrée, cette collerette 7 est inclinée en direction axiale pour un meilleur confort de prise du segment 4. Le segment 4 présente aussi une surface de préhension 8 surmoulée, en un matériau plus souple que le reste du segment 4. Cette surface de préhension 8, légèrement concave, peut aussi présenter une texture en relief ou en saillie pour une prise plus certaine. L'embout 5 présente une surface extérieure conique et un filetage complémentaire d'un filetage interne à l'intérieur du segment 4 pour sa fixation sur l'extrémité avant du segment 4.The front body 2 comprises two parts: an ergonomic grip segment 4 and a tip 5 forming a distal end of the front body 2. The segment 4 is asymmetrical with respect to a longitudinal plane A, since it has, in particular, on one side only of this longitudinal plane A, a rib 6 radially projecting. When using the instrument 1, this rib 6 functions as a key to facilitate the decision by separating the thumb of the index finger. The segment 4 also has a flange 7 radially projecting, opposing the fingers in the direction of the front end of the front body 2, and also facilitating in this way the catch of the index fingers and major and thumb around the segment 4. In the illustrated embodiment, this flange 7 is inclined in the axial direction for a better setting comfort of the segment 4. The segment 4 also has a grip surface 8 overmoulded, a softer material than the rest of the segment 4. This surface grip 8, slightly concave, may also have a texture in relief or protruding for a more certain grip. The tip 5 has a conical outer surface and a complementary thread of an internal thread inside the segment 4 for attachment to the front end of the segment 4.

Le corps arrière 3 est asymétrique par rapport à un plan longitudinal B, car il présente notamment, sur un seul côté de ce plan longitudinal B, une surface concave d'appui 9 pour faciliter l'appui du corps arrière sur la base du doigt index dans l'angle de préhension de la main de l'utilisateur. Toutefois, suivant que la main utilisée soit la main droite ou la main gauche, l'index sera d'un côté ou de l'autre de la nervure 6. Pour adapter l'instrument 1 à un usage avec la main droite ou la main gauche, le corps arrière 3 peut tourner par rapport au corps avant 2, autour de l'axe longitudinal X, entre la position illustrée sur la figure 2, qui est adaptée à une utilisation avec la main droite avec la surface concave 9 à droite de la nervure 6, et la position illustrée sur la figure 3, qui est adaptée à une utilisation avec la main gauche avec la surface concave 9 à gauche de la nervure 6.The rear body 3 is asymmetrical with respect to a longitudinal plane B, since it has in particular, on one side of this longitudinal plane B, a concave bearing surface 9 to facilitate the support of the rear body on the base of the index finger in the grip angle of the user's hand. However, depending on whether the hand used is the right hand or the left hand, the index finger will be on one side or the other of the rib 6. To adapt the instrument 1 to use with the right hand or the hand left, the body 3 can rotate relative to the front body 2, about the longitudinal axis X, between the position illustrated on the figure 2 , which is adapted for use with the right hand with the concave surface 9 to the right of the rib 6, and the position illustrated on the figure 3 , which is adapted for use with the left hand with the concave surface 9 to the left of the rib 6.

Entre ces deux positions, les plans longitudinaux A et B tournent l'un par rapport à l'autre autour de leur ligne d'intersection suivant l'axe longitudinal X. En conséquence, l'instrument 1 peut aussi adopter la position intermédiaire illustrée sur la figure 1, entre les positions des figures 2 et 3, dans laquelle le plan longitudinal A du corps avant 2 coïncide avec le plan longitudinal B du corps arrière 3. Dans le mode de réalisation illustré, l'instrument 1 comporte une pointe d'écriture 10 rétractable, et un mécanisme de rétraction et extension de cette pointe d'écriture 10 qui est actionnable par rotation relative des corps avant et corps arrière 2,3, et configuré de manière à ce que la pointe d'écriture 10 soit escamotée dans le corps avant 2 quand les corps avant et arrière 2,3 sont dans la position intermédiaire illustrée sur la figure 1, et en saillie au-delà de l'extrémité avant du corps avant 2 quand les corps avant et arrière 2,3 sont dans les positions illustrées sur les figures 2 et 3. L'angle de rotation α du corps arrière 3 par rapport au corps avant 2, entre la position intermédiaire illustrée sur la figure 1 et chacune des positions illustrées sur les figures 2 et 3 peut être, par exemple, de 120°.Between these two positions, the longitudinal planes A and B rotate relative to each other about their line of intersection along the longitudinal axis X. Accordingly, the instrument 1 can also adopt the intermediate position illustrated on the figure 1 , between the positions of Figures 2 and 3 in which the longitudinal plane A of the front body 2 coincides with the longitudinal plane B of the rear body 3. In the illustrated embodiment, the instrument 1 comprises a retractable writing tip 10, and a retraction mechanism and extension of this writing tip 10 which is actuable by relative rotation of the front body and rear body 2,3, and configured so that the writing tip 10 is retracted into the front body 2 when the front and rear bodies 2, 3 are in the intermediate position shown on the figure 1 , and protruding beyond the front end of the front body 2 when the front and rear bodies 2,3 are in the positions illustrated on the Figures 2 and 3 . The angle of rotation α of the rear body 3 with respect to the front body 2, between the intermediate position illustrated on the figure 1 and each of the positions illustrated on the Figures 2 and 3 can be, for example, 120 °.

La figure 4 illustre une perspective éclatée de l'instrument 1, permettant d'apprécier ses composants internes. Ainsi, à l'intérieur de l'instrument 1 illustré, celui-ci contient un élément élastique 11 en forme de ressort hélicoïdal, une recharge standard 12 de stylo à bille, un coulisseau 13 et une pièce tubulaire 14. La recharge 12 comprend la pointe d'écriture 10 et un réservoir d'encre 15 et est reçue à l'intérieur du coulisseau 13, lequel est ouvert vers l'avant et au moins partiellement fermé vers l'arrière. L'élément élastique 11, prenant appui contre la face interne de l'embout 5 à l'extrémité avant du corps avant 2, pousse la recharge 12 contre le fond du coulisseau 13.The figure 4 illustrates an exploded perspective of the instrument 1, to appreciate its internal components. Thus, inside the instrument 1 illustrated, it contains a resilient element 11 in the form of a helical spring, a standard ballpoint refill 12, a slide 13 and a tubular piece 14. The refill 12 comprises the writing tip 10 and an ink tank 15 and is received within the slider 13, which is open forwards and at least partially closed towards the rear. The elastic element 11, bearing against the inner face of the tip 5 at the front end of the front body 2, pushes the refill 12 against the bottom of the slide 13.

Comme on peut voir sur la figure 5, qui est une coupe transversale de l'instrument 1 suivant le plan V-V de la figure 1, des nervures 16, 17 sur la surface interne du corps avant 2 coopèrent avec des rainures 18, 19 sur la surface externe du coulisseau 13, de manière à rendre le coulisseau 13 solidaire du corps avant 2 en rotation autour de l'axe longitudinal X, tout en permettant un déplacement axial du coulisseau 13 suivant l'axe longitudinal X.As we can see on the figure 5 , which is a cross section of the instrument 1 according to the VV plane of the figure 1 , ribs 16, 17 on the inner surface of the front body 2 cooperate with grooves 18, 19 on the outer surface of the slider 13, so as to make the slider 13 integral with the front body 2 in rotation around the longitudinal axis X, while permitting axial displacement of the slider 13 along the longitudinal axis X.

Le coulisseau 13 présente également un doigt 20 sur sa surface externe. Comme on peut voir sur la figure 6, ce doigt 20 est en contact avec une surface de came 21 formée dans la surface interne du corps arrière 3 et constitue avec elle un mécanisme d'extension et de rétraction de la pointe d'écriture 10. La surface de came 21 présente un contour hélicoïdal apte à pousser le doigt 20 vers l'avant quand le corps arrière 3 tourne dans l'un ou l'autre sens à partir de la position intermédiaire illustrée sur la figure 1. Comme le doigt 20 est relié à la pointe d'écriture 10 à travers le coulisseau 13 et la recharge 12, la rotation du corps arrière 3 dans l'un ou l'autre sens autour de l'axe longitudinal X par rapport au corps avant 2, va actionner le déplacement de la pointe d'écriture 10 entre sa position de retrait, illustrée sur la figure 6, et sa position d'écriture, illustrée sur la figure 7. Dans la position de retrait illustrée sur la figure 6, la pointe d'écriture 10 est reçue dans le corps avant 2, et plus spécifiquement, dans le mode de réalisation illustré, dans l'embout 5. Dans la position d'écriture, illustrée sur la figure 7, la pointe d'écriture 10 est en saillie au-delà de l'extrémité avant du corps avant 2.The slider 13 also has a finger 20 on its outer surface. As we can see on the figure 6 this finger 20 is in contact with a cam surface 21 formed in the inner surface of the rear body 3 and constitutes with it a mechanism for extending and retracting the writing tip 10. The cam surface 21 has a contour helical adapted to push the finger 20 forward when the rear body 3 rotates in one or the other direction from the intermediate position illustrated on the figure 1 . As the finger 20 is connected to the writing tip 10 through the slider 13 and the refill 12, the rotation of the rear body 3 in one or the other direction about the longitudinal axis X with respect to the front body 2, will actuate the movement of the writing tip 10 between its retracted position, illustrated in FIG. figure 6 , and its writing position, illustrated on the figure 7 . In the position of withdrawal illustrated on the figure 6 , the writing tip 10 is received in the front body 2, and more specifically, in the illustrated embodiment, in the mouthpiece 5. In the writing position, illustrated in FIG. figure 7 the writing tip 10 protrudes beyond the front end of the front body 2.

La surface de came 21 est plus clairement visible sur les figures 8 et 9, illustrant, respectivement, un écorché partiel du corps arrière 3, et une coupe longitudinale partielle suivant un plan IX-IX perpendiculaire au plan B. On y voit, en particulier, comment la surface de came 21 est symétrique par rapport au plan longitudinal B, de manière à actionner le même mouvement d'extension de la pointe d'écriture 10 quand le corps arrière 3 est tourné dans l'un ou l'autre sens à partir de la position intermédiaire illustrée sur les figures 3 et 6. En outre, cette surface de came présente, de chaque côté, une encoche 22 en fin de course destinée à accrocher le doigt 20 et ainsi bloquer la pointe d'écriture 10 dans sa position d'écriture. Toutefois, l'angle d'inclinaison du bord intérieur 23 de chaque encoche 22 est tel qu'elle n'offre qu'une légère résistance à la rotation du corps arrière 3 quand l'utilisateur le fait tourner, par rapport au corps avant 2, de cette position vers sa position intermédiaire pour escamoter la pointe d'écriture 10 dans le corps avant 2.The cam surface 21 is more clearly visible on the Figures 8 and 9 , illustrating, respectively, a partial cutaway of the rear body 3, and a partial longitudinal section along an IX-IX plane perpendicular to the plane B. In particular, it can be seen how the cam surface 21 is symmetrical with respect to the longitudinal plane B , so as to actuate the same extension movement of the writing tip 10 when the rear body 3 is rotated in either direction from the intermediate position illustrated on the figures 3 and 6 . In addition, this cam surface has, on each side, a notch 22 at the end of stroke intended to hook the finger 20 and thus block the writing tip 10 in its writing position. However, the angle of inclination of the inner edge 23 of each notch 22 is such that it offers only a slight resistance to the rotation of the rear body 3 when the user rotates it, relative to the front body 2 from this position to its intermediate position to retract the writing tip 10 into the front body 2.

Le corps arrière 3 comprend aussi, sur sa surface interne, des épaulements radiaux 24 et une nervure longitudinale 25 destinés à coopérer avec la pièce tubulaire 14. Comme illustré sur les figures 10 et 11, le segment 4 présente aussi, sur son extrémité arrière, des lèvres 26, 27 destinées à coopérer avec la pièce tubulaire 14, ainsi qu'une butée de rotation 28. Cette pièce tubulaire 14 est illustrée en plus grand détail sur les figures 12 à 14. Sur ces figures, on peut apprécier comment elle présente une fente longitudinale 29. D'une part, grâce à cette fente longitudinale, la pièce tubulaire 14 est plus facilement déformable de manière élastique dans un plan radial. Mais en outre, cette fente 29 est apte à recevoir la nervure 25 du corps arrière 3, de manière à coopérer avec celle-ci pour rendre la pièce tubulaire 14 solidaire du corps arrière en rotation, comme illustré en particulier sur la figure 5. La largeur de la fente 29 quand la pièce tubulaire 14 est libre de contraintes est toutefois moindre que celle de la nervure 25, de telle manière que, lorsque la nervure 25 est introduite dans la fente 29, elle provoque l'expansion radiale de la pièce tubulaire 14. Sur les figures 12 à 14 on peut aussi apprécier comment la pièce tubulaire 14 présente des épaulements radiaux 30 sur sa surface extérieure. Comme illustré en particulier sur les figures 6 et 7, ces épaulements radiaux 30 dans la pièce tubulaire 14, qui est dilatée radialement par l'engagement à force de la nervure 25 dans la fente 29, coopèrent avec les épaulements radiaux 24 pour retenir la pièce tubulaire 14 dans le corps arrière 3 par encliquetage élastique. Le bord arrière 31 de la pièce tubulaire 14 forme également un épaulement radial contre lequel prennent appui les lèvres 26,27 du segment 4 pour ainsi retenir axialement le corps avant 2 par encliquetage élastique, sans empêcher toutefois sa rotation par rapport à la pièce tubulaire 14 et au corps arrière 3. Toutefois, comme illustré sur les figures 12 à 14, la pièce tubulaire 14 présente aussi des protubérances axiales sur son bord avant 32, formant des butées 33 en rotation, lesquelles butent contre la butée correspondante 28 du corps avant 2 pour limiter la rotation relative du corps arrière 3 par rapport au corps avant 2. Ainsi, la pièce tubulaire 14 relie axialement le corps avant 2 et le corps arrière 3, et limite leur rotation relative entre les positions illustrées sur les figures 2 et 3.The rear body 3 also comprises, on its inner surface, radial shoulders 24 and a longitudinal rib 25 intended to cooperate with the tubular part 14. As illustrated in FIGS. Figures 10 and 11 , the segment 4 also has, on its rear end, lips 26, 27 intended to cooperate with the tubular piece 14, as well as a rotation stop 28. This tubular piece 14 is illustrated in greater detail on the Figures 12 to 14 . In these figures, one can appreciate how it has a longitudinal slot 29. On the one hand, thanks to this longitudinal slot, the tubular member 14 is more easily elastically deformable in a radial plane. But in addition, this slot 29 is adapted to receive the rib 25 of the rear body 3, so as to cooperate with it to make the tubular part 14 integral with the rear body in rotation, as shown in particular on the figure 5 . The width of the slot 29 when the tubular piece 14 is free of stresses is however less than that of the rib 25, so that when the rib 25 is inserted into the slot 29, it causes the radial expansion of the piece. tubular 14. On the Figures 12 to 14 it can also be appreciated how the tubular member 14 has radial shoulders 30 on its outer surface. As illustrated in particular on Figures 6 and 7 these radial shoulders 30 in the tubular piece 14, which is expanded radially by the force engagement of the rib 25 in the slot 29, cooperate with the radial shoulders 24 to retain the tubular member 14 in the rear body 3 by resilient snap-fastening . The rear edge 31 of the tubular part 14 also forms a radial shoulder against which the lips 26, 27 of the segment 4 rest to thus axially retain the front body 2 by resilient snapping, without, however, preventing its rotation relative to the tubular part 14. and rear body 3. However, as illustrated in Figures 12 to 14 , the tubular piece 14 also has axial protuberances on its front edge 32, forming stops 33 in rotation, which abut against the corresponding stop 28 of the front body 2 to limit the relative rotation of the rear body 3 relative to the front body 2. Thus, the tubular piece 14 axially connects the front body 2 and the rear body 3, and limits their relative rotation between the positions illustrated in the drawings. Figures 2 and 3 .

Lors de l'assemblage de l'instrument d'écriture 1, le coulisseau 13 est introduit à l'arrière du segment 4, et la pièce tubulaire 14 est enfilée, grâce à son élasticité radiale, sur l'extrémité arrière du segment 4 jusqu'à ce que son bord arrière 31 puisse prendre appui sur les faces avant des lèvres 26. Ensuite, l'extrémité arrière du segment 4, avec la pièce tubulaire 14 et le coulisseau 13, est introduite dans le corps arrière 3, avec la fente 29 de la pièce tubulaire 14 alignée avec la nervure 25 du corps arrière 3, et les rainures 18, 19 du coulisseau 13 alignées avec les nervures 16, 17 correspondantes sur la surface interne du segment 4. Grâce à l'élasticité radiale de la pièce tubulaire 14, et à l'inclinaison des surfaces 34 et 35 dans, respectivement, la pièce tubulaire 14 et le corps arrière 3, l'extrémité arrière du segment 4 et la pièce tubulaire 14 peuvent pénétrer dans l'extrémité avant du corps arrière jusqu'à ce que l'engagement à force de la nervure 25 dans la fente 29 provoque la dilatation radiale de la pièce tubulaire 14, de telle manière que ses épaulements radiaux 30 prennent appui sur les épaulements radiaux 24 du corps arrière 3 pour ainsi bloquer axialement le segment 4 par rapport au corps arrière 2. La recharge 12 et le ressort 11 peuvent ensuite être introduits dans l'instrument 1 à travers l'extrémité avant du segment 4, laquelle peut ensuite être fermée avec l'embout 5 pour compléter le corps avant 2 et l'instrument 1. Subséquemment, la recharge 12 pourra être facilement remplacée en dévissant l'embout 5, sans devoir séparer le corps avant 2 entier du corps arrière 3.During the assembly of the writing instrument 1, the slide 13 is introduced at the rear of the segment 4, and the tubular piece 14 is threaded, thanks to its radial elasticity, on the rear end of the segment 4 until its rear edge 31 can bear on the front faces of the lips 26. Then, the rear end of the segment 4, with the tubular piece 14 and the slider 13 is introduced into the rear body 3, with the slot 29 of the tubular piece 14 aligned with the rib 25 of the rear body 3, and the grooves 18, 19 of the slider 13 aligned with the ribs 16, 17 corresponding on the internal surface of the segment 4. Thanks to the radial elasticity of the tubular piece 14, and the inclination of the surfaces 34 and 35 in, respectively, the tubular piece 14 and the rear body 3, the rear end of the segment 4 and the tubular part 14 can penetrate into the front end of the rear body until the force engagement of the rib 25 in the slot 29 causes the radial expansion of the tubular member 14, so that its radial shoulders 30 rest on the radial shoulders 24 of the rear body 3 to axially block the segment 4 relative to the rear body 2. The refill 12 and the spring 11 can then be introduced into the instrument 1 through the front end of the segment 4 , which can then be closed with the nozzle 5 to complete the front body 2 and the instrument 1. Subsequently, the refill 12 can be easily replaced by unscrewing the nozzle 5, without having to separate the entire front body 2 of the rear body 3.

Quoique la présente invention ait été décrite en se référant à un exemple de réalisation spécifique, il est évident que des différentes modifications et changements peuvent être effectués sur ces exemples sans sortir de la portée générale de l'invention telle que définie par les revendications. Par conséquent, la description et les dessins doivent être considérés dans un sens illustratif plutôt que restrictif.Although the present invention has been described with reference to a specific exemplary embodiment, it is obvious that various modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the claims. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

Claims (16)

Instrument d'écriture (1) comportant : un corps avant (2) avec un segment (4) de préhension ergonomique asymétrique par rapport à un premier plan longitudinal (A), et un corps arrière (3) asymétrique par rapport à un deuxième plan longitudinal (B), et caractérisé en ce que le corps arrière (3) est apte à tourner, par rapport au corps avant (2), autour d'un axe longitudinal (X) correspondant à une ligne d'intersection entre le premier plan longitudinal (A) et le deuxième plan longitudinal (B), entre une position adaptée à une prise avec une main droite et une position adaptée à une prise avec une main gauche.Writing instrument (1) comprising: a front body (2) with an asymmetrical ergonomic grip segment (4) with respect to a first longitudinal plane (A), and a rear body (3) asymmetrical with respect to a second longitudinal plane (B), and characterized in that the rear body (3) is rotatable relative to the front body (2) about a longitudinal axis (X) corresponding to a line of intersection between the first longitudinal plane (A) and the second longitudinal plane (B), between a position adapted to a grip with a right hand and a position adapted to a grip with a left hand. Instrument d'écriture (1) suivant la revendication 1, dans lequel ledit segment (4) de préhension ergonomique présente, d'un seul côté dudit premier plan longitudinal (A), une nervure (6) orientée longitudinalement, et radialement saillante par rapport à une surface (8) de préhension dudit segment (4).Writing instrument (1) according to claim 1, wherein said ergonomic grip segment (4) has, on one side of said first longitudinal plane (A), a rib (6) oriented longitudinally and radially projecting from to a gripping surface (8) of said segment (4). Instrument d'écriture (1) suivant la revendication 2, dans lequel ladite nervure (6) est saillante d'au moins 2 mm par rapport à la surface de préhension (8) dudit segment (4).Writing instrument (1) according to claim 2, wherein said rib (6) projecting at least 2 mm from the gripping surface (8) of said segment (4). Instrument d'écriture (1) suivant l'une quelconque des revendications 1 à 3, dans lequel ledit segment (4) de préhension ergonomique présente une collerette (7) d'arrêt des doigts en direction d'une extrémité avant du corps avant (2).Writing instrument (1) according to any one of claims 1 to 3, wherein said ergonomic grip segment (4) has a finger stop collar (7) towards a front end of the front body ( 2). Instrument d'écriture (1) suivant l'une quelconque des revendications 1 à 4, dans lequel ledit segment (4) de préhension ergonomique présente une surface (8) de préhension souple.Writing instrument (1) according to any one of claims 1 to 4, wherein said ergonomic grip segment (4) has a flexible gripping surface (8). Instrument d'écriture (1) suivant la revendication 5, dans lequel ladite surface (8) de préhension souple est surmoulée sur le segment (4) de préhension ergonomique.Writing instrument (1) according to claim 5, wherein said flexible grip surface (8) is overmolded on the ergonomic grip segment (4). Instrument d'écriture (1) suivant l'une quelconque des revendications 1 à 6, dans lequel ledit instrument d'écriture (1) comprend aussi : une pointe d'écriture (10), et un mécanisme de rétraction et d'extension de la pointe d'écriture, actionnable par rotation relative des corps avant et arrière (2,3), et configuré de manière à ce que la pointe d'écriture (10) soit escamotée dans le corps avant (2) quand le corps arrière (3) et le corps avant (2) sont dans une position intermédiaire entre la position adaptée à la prise avec la main droite et la position adaptée à la prise avec la main gauche, et en saillie au-delà d'une extrémité avant du corps avant (2) quand le corps arrière (3) et le corps avant (2) sont dans la position adaptée à la prise avec la main droite ou dans la position adaptée à la prise avec la main gauche. Writing instrument (1) according to any one of claims 1 to 6, wherein said writing instrument (1) further comprises: a writing tip (10), and a mechanism for retracting and extending the writing tip, operable by relative rotation of the front and rear bodies (2,3), and configured so that the writing tip (10) is retracted into the body before (2) when the rear body (3) and the front body (2) are in an intermediate position between the position adapted to grip with the right hand and the position adapted to grip with the left hand, and protruding from the a front end of the front body (2) when the rear body (3) and the front body (2) are in the position adapted to the grip with the right hand or in the position adapted to grip with the hand left. Instrument d'écriture (1) suivant la revendication 7, dans lequel ledit mécanisme de rétraction et d'extension comprend une surface de came (21), solidaire en rotation de l'un desdits corps avant et corps arrière (2,3), et un élément solidaire en rotation de l'autre desdits corps avant et corps arrière (2,3) et en contact avec ladite surface de came (21), la surface de came (21) ou ledit élément en contact avec la surface de came étant apte à se déplacer dans l'instrument d'écriture (1) suivant ledit axe longitudinal (X) et étant solidaire de la pointe d'écriture (10) au moins en translation suivant l'axe longitudinal (X).Writing instrument (1) according to claim 7, wherein said retraction and extension mechanism comprises a cam surface (21), rotatably connected to one of said front body and rear body (2,3), and an element rotatably integral with the other of said front body and rear body (2,3) and in contact with said cam surface (21), the cam surface (21) or said element in contact with the cam surface being able to move in the writing instrument (1) along said longitudinal axis (X) and being integral with the writing tip (10) at least in translation along the longitudinal axis (X). Instrument d'écriture (1) suivant l'une quelconque des revendications 1 à 8, comprenant en outre une pièce tubulaire (14) joignant axialement le corps avant (2) et le corps arrière (3) par encliquetage élastique.Writing instrument (1) according to any one of claims 1 to 8, further comprising a tubular member (14) axially joining the front body (2) and the rear body (3) by snap elastically. Instrument d'écriture (1) suivant la revendication 9, dans lequel ladite pièce tubulaire (14) présente des épaulements radiaux opposés à des épaulements correspondants des corps avant et arrière (2,3) pour retenir axialement ladite pièce tubulaire par rapport aux corps avant et arrière (2,3).Writing instrument (1) according to claim 9, wherein said tubular piece (14) has radial shoulders opposite to corresponding shoulders of the front and rear bodies (2,3) for axially retaining said tubular piece with respect to the front bodies and back (2,3). Instrument d'écriture (1) suivant l'une quelconque des revendications 9 ou 10, dans lequel ladite pièce tubulaire (14) est reçue dans l'instrument d'écriture (1).Writing instrument (1) according to any one of claims 9 or 10, wherein said tubular piece (14) is received in the writing instrument (1). Instrument d'écriture (1) suivant l'une quelconque des revendications 9 à 11, dans lequel ladite pièce tubulaire (14) est solidaire en rotation de l'un desdits corps avant et arrière (2,3) et présente deux butées (33) en rotation par rapport à l'autre desdits corps avant et arrière (2,3).Writing instrument (1) according to any one of claims 9 to 11, wherein said tubular piece (14) is integral in rotation with one of said front and rear bodies (2,3) and has two stops (33). ) rotated relative to the other of said front and rear bodies (2,3). Instrument d'écriture (1) suivant l'une quelconque des revendications 9 à 12, dans lequel ladite pièce tubulaire (14) présente une fente longitudinale (29).Writing instrument (1) according to any one of claims 9 to 12, wherein said tubular member (14) has a longitudinal slot (29). Instrument d'écriture (1) suivant la revendication 13, dans lequel ladite pièce tubulaire (14) reçoit, dans ladite fente longitudinale (29), une nervure (25) solidaire de l'un desdits corps avant ou arrière (2,3) dont elle est solidaire en rotation.Writing instrument (1) according to claim 13, wherein said tubular piece (14) receives, in said longitudinal slot (29), a rib (25) integral with one of said front or rear bodies (2,3) which it is integral in rotation. Instrument d'écriture (1) suivant la revendication 14, dans lequel la nervure (25) est engagée à force dans la fente longitudinale (29).Writing instrument (1) according to claim 14, wherein the rib (25) is forcibly engaged in the longitudinal slot (29). Procédé d'utilisation d'un instrument d'écriture (1) suivant l'une quelconque des revendications précédentes, dans lequel le segment (4) de préhension ergonomique est tenu entre les bouts du pouce et d'au moins un des doigts index et majeur d'une même main, et le corps arrière (3) est tourné par rapport au corps avant (2) vers la position adaptée à une prise avec une main droite ou vers la position adaptée à une prise avec une main gauche selon la main utilisée, de manière à assurer le support du corps arrière (3) dans l'angle de préhension entre le doigt index et le pouce.A method of using a writing implement (1) according to any one of the preceding claims, wherein the ergonomic grip segment (4) is held between the tips of the thumb and at least one of the index fingers and major of the same hand, and the rear body (3) is rotated relative to the front body (2) to the position adapted to a grip with a right hand or to the position adapted to a grip with a left hand according to the hand used, so as to ensure the support of the rear body (3) in the gripping angle between the index finger and the thumb.
EP13183648.8A 2012-09-11 2013-09-10 Ergonomic, versatile writing instrument Active EP2705960B1 (en)

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KR (1) KR102118114B1 (en)
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Also Published As

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FR2995246A1 (en) 2014-03-14
KR20140034102A (en) 2014-03-19
CN103660697B (en) 2017-01-04
FR2995246B1 (en) 2014-09-05
CN103660697A (en) 2014-03-26
JP6234741B2 (en) 2017-11-22
US20140072359A1 (en) 2014-03-13
KR102118114B1 (en) 2020-06-02
US9610797B2 (en) 2017-04-04
EP2705960B1 (en) 2015-06-03
JP2014054840A (en) 2014-03-27

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