EP2837505A1 - Mechanical pencil having a removable lead cartridge - Google Patents

Mechanical pencil having a removable lead cartridge Download PDF

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Publication number
EP2837505A1
EP2837505A1 EP20140180455 EP14180455A EP2837505A1 EP 2837505 A1 EP2837505 A1 EP 2837505A1 EP 20140180455 EP20140180455 EP 20140180455 EP 14180455 A EP14180455 A EP 14180455A EP 2837505 A1 EP2837505 A1 EP 2837505A1
Authority
EP
European Patent Office
Prior art keywords
cartridge
section
mechanical pencil
mine
mines
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
EP20140180455
Other languages
German (de)
French (fr)
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EP2837505B1 (en
Inventor
François Aznar
Steven Falcoz
François Dufournet
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MAPED SAS
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MAPED SAS
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Publication of EP2837505A1 publication Critical patent/EP2837505A1/en
Application granted granted Critical
Publication of EP2837505B1 publication Critical patent/EP2837505B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/16—Writing-core feeding mechanisms with stepwise feed of writing-cores
    • B43K21/20—Writing-core feeding mechanisms with stepwise feed of writing-cores with writing-cores automatically replaced from magazines
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/006—Pencil-barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/22—Writing-cores gripping means, e.g. chucks

Definitions

  • the present invention relates to a mechanical pencil whose mines are contained in a removable cartridge.
  • Patent FR 2 493 769 A1 which describes a mechanical pencil comprising an interchangeable mine reservoir.
  • This reservoir has an end inside which has been formed an annular guide portion to which is connected a mine outlet port of the reservoir, whose free diameter is smaller than the diameter of the mines.
  • This mechanical pencil is characterized in that the advance mechanism of the mine has a nipple which is designed so that the annular guide part of the reservoir fits so that the exit orifice of the reservoir widens. mines.
  • the interlocking, by complementary shapes, of the annular guide portion formed in the material of one end of the reservoir on the nipple produces the enlargement of the mine outlet port.
  • the patent is known US 5,162,812 which discloses a mechanical pencil having an elongate body which is decomposed into a first portion and a second portion, said first and second portions are configured to be interconnected with a connecting means.
  • the mechanical pencil described in this patent US 5,162,812 includes a housing designed to accommodate an interchangeable mine tank. The outlet end of the reservoir mine is configured so that said reservoir remains coupled to the advance mechanism of the mine when the reservoir has been put in place in the housing of the mechanical pencil.
  • Such interchangeable mine-mine mechanical pencils thus comprise a mine reservoir which is coupled to the advance mechanism of the mine.
  • These embodiments then have the disadvantage that the advance mechanism of the mine constantly exerts efforts on the mine reservoir and may, by dint of use of the mechanical pencil, damage this reservoir.
  • the mine reservoir is movable during the advance of the mine by the advance mechanism of the mine, which, because of these stresses, tends to wear the mine reservoir.
  • the present invention proposes to solve the disadvantages detailed above by providing a mechanical pencil which, to be recharged in mines, simply requires to replace an empty mine cartridge with a full mine cartridge.
  • the innovative peculiarity of this mechanical pencil lies in the fact that the advance mechanism of the mine is decoupled from the mine cartridge. In other words, during the advance of the mine, the mine cartridge remains static in the mechanical pencil.
  • reloading mines of the mechanical pencil according to the invention eliminates any manual or individual manipulation of the mines, generally at the origin of loss or breakage thereof, as well as dirt for the user.
  • the mine cartridge that is inserted into the mechanical pencil according to the invention also has the function of storing the mines.
  • the mine cartridge is a holster for mines before they are inserted into the mechanical pencil for reloading mines.
  • the cartridge of mines is replaced as simply and quickly as one replaces an ink cartridge in a fountain pen.
  • the A mechanical pencil according to the invention is therefore practical to use. This makes it particularly suitable for use by children.
  • the cartridge will remain static during the advance of the mine.
  • the mine exits, by gravity, the cartridge through the outlet opening of the mine, then passes through the coupling element advantageously hollowed out in its central part, to be brought to the advance mechanism which will then convey the mine to the exit port of the mechanical pencil.
  • the advance mechanism of the mine is completely dissociated from the mine cartridge (or in other words the mine tank).
  • the mine cartridge remaining static is not requested during the advance of the mine by means of the advance mechanism. This protects it from the wear which could result in particular, too broadening the outlet opening of the cartridge of the mine in such a way that several cartridges tend to obstruct this outlet opening thus rendering unusable the mechanical pencil.
  • the connecting means consists of a means selected from the group consisting of the screwing means, the clipping means and the bayonet connection means.
  • the coupling element has a base and a frustoconical contact surface, preferably frustoconical diverging from upstream to downstream.
  • the frustoconical contact surface is configured to contact the downstream end of the cartridge when the first and second portions of the elongate body of the mechanical pencil have been interconnected with the connecting means.
  • This contact surface having a frustoconical shape is particularly suitable for enlarging the outlet opening of the mine of the cartridge.
  • the coupling element is integral with the first part of the elongated body of the mechanical pencil.
  • the coupling element is made of material with the first part of the elongate body of the mechanical pencil.
  • the element coupling may have been molded or overmoulded in said first part. This has the advantage of removing a part, as well as a step of assembly of the mechanical pencil according to the invention.
  • the elongate body has a side wall extending along the longitudinal axis.
  • an internal shoulder to define a passage section which is smaller than the cross section of the base of the coupling element.
  • This internal shoulder makes it possible to arrange the coupling element in the first part of the elongated body of the mechanical pencil.
  • the coupling element is in the form of a separate part of the rest of the mechanical pencil and may have been welded, glued or even clipped into the first part of the mechanical pencil at the level of this internal shoulder.
  • any other method of attachment of the coupling element than those mentioned above and within the reach of those skilled in the art is conceivable.
  • the coupling element may have been suitably manufactured and be made of a material particularly suitable for enlarging the outlet opening of the cartridge barrel once the first and second parts of the elongate body of the mechanical pencil have been interconnected.
  • the coupling member may comprise a more rigid material than the rest of the mechanical pencil.
  • the elongated body of the mechanical pencil is tubular.
  • the elongated body of the mechanical pencil is made of a plastic material.
  • this plastic material is selected from the group consisting of polystyrenes and polycarbonates.
  • the feed mechanism is provided with a push button, preferably a lateral push button, configured to operate the feed mechanism.
  • the slots that comprise the cartridge according to the invention has the advantage of improving the deformation, or in other words the enlargement, of the cross section of the downstream end of the cartridge, as well as that of the exit opening of the cartridge. the mine, when the coupling element is in the engagement position when the first and second parts of the elongated body of the mechanical pencil have been interconnected.
  • the cartridge outlet port is between the first section and the second section of the side wall of the downstream end of the cartridge.
  • This embodiment of the section of the side wall of the downstream end is particularly advantageous to limit the risk of breakage and loss of mines in case of inadvertent disassembly of the mechanical pencil in which is inserted the cartridge according to the invention.
  • this form of the downstream end of the cartridge is particularly suitable when the coupling element has a frustoconical contact surface diverging from upstream to downstream. Indeed, this surface comes into contact with the second section of the wall of the downstream end of the cartridge, when the first portion and the second portion of the elongate body of the mechanical pencil are interconnected, so as to enlarge the section. cross section of this second section of the side wall of the downstream end of the cartridge and the outlet port of the mine between said first section and said second section.
  • the section of the side wall of the downstream end further comprises an intermediate section of constant cross section between the first section and the second section.
  • the section of the side wall of the downstream end is made of a semi-rigid shape memory material.
  • this semi-rigid shape-memory material is selected from the group consisting of polymethyl methacrylate (PMMA), polyacetal copolymer (POM-C), polyurethanes, polyamides and polyolefins such as polyethylene and polypropylene.
  • the outlet opening of the mine finds, thanks to the shape memory of the material, a diameter smaller than the diameter of the mine, so as to prevent the exit of mines still present in the mine. cartridge.
  • the user can easily change the cartridge of mines by replacing a mine cartridge not yet empty by another cartridge, for example by a cartridge containing mines of different hardness or color, without the risk of losing mines during this reloading of the mechanical pencil according to the invention.
  • the cartridge according to the invention is not designed for a single model of mines, but it can serve as a holster of mines of different types of mines. This is also particularly advantageous from an economic point of view.
  • the cartridge has an upstream end which is closed.
  • the upstream end of the cartridge is closed by a rubber.
  • the upstream end of the cartridge is open and can be plugged, for example by a removable cap, when the cartridge is empty, it can be considered to replenish mines in them. inserting directly through the open end end of said cartridge. In other words, the empty cartridge is reusable.
  • the cartridge has a generally cylindrical shape.
  • the cartridge is advantageously made of a plastic material.
  • the plastic material is selected from the group consisting of polymethyl methacrylate (PMMA), polyacetal copolymer (POM-C), polyurethanes, polyamides, polyolefins such as polyethylene and polypropylene.
  • the mine cartridge according to the invention is monobloc.
  • the cartridge according to the invention may be in one piece and have an upstream end closed by a removable cap or a rubber.
  • Another object of the present invention is a writing instrument comprising a mechanical pencil as described above and a mine cartridge as described above, optionally said cartridge is filled with mines.
  • the mine may be a graphite mine or a mine comprising at least one colored pigment.
  • the mechanical pencil and the cartridge according to the invention can be suitable both to accommodate graphite mines (for example with a diameter of between 0.3 and 1.2 mm) and colored mines which generally consist of a mixture of pigments, clay and gum or resin. These graphite or colored mines may have different hardnesses.
  • the cartridge 1 shown in the figures extends a longitudinal axis X.
  • the cartridge 1 comprises a tubular body 2 which has an upstream housing 16 designed to accommodate mines 4.
  • the tubular body 2 of the cartridge 1 has a generally cylindrical shape .
  • the cartridge 1 comprises a downstream end 2a which has an outlet opening 5 of the mine 4.
  • the section of the side wall 29 of the downstream end 2a has slots 23 extending along the longitudinal axis X. This has the advantage of improving the deformation, namely the enlargement of the cross section of the 2a downstream end of the cartridge 1, and that of the outlet opening 5 of the mine 4, when stresses are exerted on this end 2a of the cartridge 1.
  • the cartridge 1 further has an upstream end 2b which is closed by an eraser 3.
  • the section of the outlet opening 5 is in a rest position. This means that in this position, the section of the outlet opening 5 is smaller than the diameter of the mine 4 so that it prevents the exit of the mines 4 from the upstream housing 16 through said outlet opening 5 of mine 4 of cartridge 1.
  • FIG. 3 and 4 On the Figures 3 and 4 is shown a mechanical pencil 8 according to the invention in which the cartridge 1 shown in FIG. figure 1 .
  • the mechanical pencil 8 has a tubular body 17 which extends along the longitudinal axis X which comprises a housing 28 designed to receive the cartridge 1 of mines 4.
  • the housing 28 is decomposed into the downstream housing 24 and the upstream housing 19 of the tubular body 17.
  • the first portion 9 and the second portion 10 are interconnected with a connecting means 18. More specifically, the second portion 10 has a downstream end 10a which is provided with an external thread 18b which is particularly visible on the figure 2 .
  • the first part 9 has an upstream end 9b which is provided with an internal thread 18a (visible only on the figure 4 ) designed to cooperate with the external thread 18b.
  • the connecting means 18 is a screwing means.
  • the tubular body 17 of the mechanical pencil 8 has a generally cylindrical shape.
  • the upstream end 10b of the second part 10 of the tubular body 17 of the mechanical pencil 8 comprises an orifice 25 from which the rubber 3 protrudes when the cartridge 1 is housed entirely in the upstream housing 19 and the downstream housing 24.
  • the first part 9 has a downstream end 9a which has an outlet orifice 22 of a mine 4 and a guide-tip tip 15.
  • the advance mechanism 11 of the mine 4 comprises a movable member 12 which is extended by a clamp 13 around which is wound a spring 14.
  • the movable member 12 is slidably mounted along the longitudinal axis X in the first part 9 of the tubular body 17 of the mechanical pencil and is actuated by the lateral push button 7.
  • the advance mechanism 11 actuated by a lateral push button 7 is a conventional mechanism of a mechanical pencil and is perfectly within the reach of the skilled person.
  • the tubular body 17 of the mechanical pencil 8 has a lateral wall 31 which extends along the longitudinal axis X.
  • an internal shoulder 20 In the portion of the side wall 31 of the first portion 9 of the tubular body 17 is provided an internal shoulder 20. This internal shoulder 20 delimits a passage section 26 configured to lock a coupling element 6 in the first portion 9.
  • L coupling element 6 is a separate part of the mechanical pencil 8 which has been welded at the internal shoulder 20.
  • the coupling element 6 has a recess 21 extending along the longitudinal axis X which is configured so that a mine 4, by gravity, passes through the coupling element 6 and reaches the mechanism of advance 11 of mine 4.
  • the coupling element 6 comprises a base 27 and a contact surface 33 which is frustoconical divergent from upstream to downstream. This contact surface 33 is broken down into a plurality of fins 6a.
  • the coupling element 6 is configured to be coupled to the cartridge 1, so that when the cartridge 1 is fully housed in the upstream housing 19 and the downstream housing 24 and the first part 9 and second part 10 have have been screwed together, the cartridge 1 is in a position of use in which the mines 4 out one by one by gravity out of the upstream housing 16 through the outlet opening 5 of the cartridge 1. This position of use is represented on the figures 4 and 5b .
  • the downstream end 2a of the cartridge 1 is in contact with the fins 6a of the coupling element 6 which widen the cross section of the second section 29a of the side wall 29 of this downstream end 2a.
  • the coupling element 6 comes into progressive contact with the downstream end 2a of the cartridge 1 as the first part 9 is screwed onto the second part 10, which has the effect of progressively enlarging the section. the outlet opening 5 of the mine 4 the cartridge 1.
  • the downstream end 2a of the cartridge 1 is formed and the risk of premature wear of the cartridge 1 are thus avoided .
  • a writing instrument 30 which comprises a mechanical pencil 8 and a cartridge 1 filled with mines 4.
  • the cartridge 1 and the mechanical pencil 8 have been designed so that, when the first part 9 and second part 10 of this tubular body 17 have been unscrewed, the downstream end 2a of the cartridge 1 protrudes from the downstream end 10a of the second part 10 of the tubular body 17. In this way, the user can easily grasp the cartridge 1.
  • the cartridge 1 and the mechanical pencil may be designed in such a way that when the first part 9 and second part 10 of the tubular body 17 of the mechanical pencil 8 have been unscrewed, the cartridge 1 remains attached to the coupling element 6.
  • the cartridge 1 protrudes from the upstream end 9b of the first portion 9 of the tubular body 17 of the mechanical pencil 8 to be easily grasped by its user during the replacement of cartridge 1 of mines 4.
  • the figure 5a also enlarges a part of the mechanical pencil 8 before the coupling element 6 is coupled to the cartridge 1.
  • the present invention is not limited to this embodiment of cartridge 1 and pencil 8 shown in the figures but covers other embodiments that can implement, for example, other embodiments. the coupling element 6, the downstream end 2a of the cartridge 1 or the feed mechanism 11 of the mine 4.

Abstract

La présente invention concerne un porte-mine (8) présentant un corps allongé (17) conçu pour accueillir une cartouche (1) de mines (4), ledit porte-mine (8) se caractérise en ce que : - le corps allongé (17) du porte-mine (8) se décompose en au moins une première partie (9) et une deuxième partie (10) qui sont configurées pour être reliées entre elles avec un moyen de liaison (18a,18b), et - un élément d'accouplement (6) est disposé dans la première partie (9) de manière à ce qu'il soit en position d'engagement lorsque les première partie (9) et deuxième partie (10) sont reliées entre elles avec le moyen de liaison (18a,18b), afin que les mines (4) sortent par gravité hors de la cartouche (1) au travers une ouverture de sortie (5) de la mine (4). Ainsi, le mécanisme d'avance (11) de la mine (4) dont est équipé le porte-mine (8) est découplé de la cartouche (1) de mines (4). La présente invention a aussi pour un objet une cartouche (1) conçue pour être insérée dans ce porte-mine (8).The present invention relates to a mechanical pencil (8) having an elongate body (17) adapted to receive a cartridge (1) mines (4), said mechanical pencil (8) is characterized in that: the elongate body (17) of the mechanical pencil (8) is broken down into at least a first part (9) and a second part (10) which are configured to be interconnected with a connection means (18a, 18b) , and a coupling element (6) is arranged in the first part (9) so that it is in the engagement position when the first part (9) and the second part (10) are connected to each other with the connecting means (18a, 18b), so that the mines (4) out of the cartridge (1) by gravity through an outlet opening (5) of the mine (4). Thus, the advance mechanism (11) of the mine (4) which is equipped with the mechanical pencil (8) is decoupled from the cartridge (1) mines (4). The present invention also has for one object a cartridge (1) designed to be inserted in this mechanical pencil (8).

Description

La présente invention concerne un porte-mine dont les mines sont contenues dans une cartouche amovible.The present invention relates to a mechanical pencil whose mines are contained in a removable cartridge.

Actuellement, la majorité des porte-mines se rechargent en transférant individuellement ou par quelques unités, des mines d'un étui-mine au réservoir du porte-mine, et ce soit en ouvrant le porte-mine dont le corps tubulaire se décompose en deux parties liées entre elles par vissage ou par clippage, ou bien le plus souvent, en retirant la gomme située sur l'extrémité amont du porte-mine de manière à dégager un orifice du réservoir.Currently, the majority of mechanical pencils are recharged by transferring individually or by a few units, mines from a case to the reservoir of the mechanical pencil, and this is by opening the mechanical pencil whose tubular body breaks down in two parts linked together by screwing or clipping, or more often, by removing the eraser located on the upstream end of the mechanical pencil so as to clear an orifice of the reservoir.

Or, la manipulation des mines de graphite est problématique pour les raisons suivantes :

  • on a tendance à se salir les mains en manipulant à l'unité les mines, et
  • du fait de leur fragilité, le risque de casse ou de perte de mines est élevé, en particulier pour les enfants.
However, the manipulation of graphite mines is problematic for the following reasons:
  • we tend to get our hands dirty by manipulating the mines
  • because of their fragility, the risk of breakage or loss of mines is high, especially for children.

C'est pourquoi, on a cherché à pallier ces inconvénients en mettant au point des porte-mines comprenant un réservoir de mines interchangeable, ou autrement dit une cartouche de mines. Dans ces modes de réalisation, l'utilisateur recharge en mines son porte-mine en remplaçant le réservoir de mines vide par un réservoir de mines plein, de la même manière qu'on remplace une cartouche d'encre dans un stylo à plume. Cela présente l'avantage que l'utilisateur, lors de ce rechargement, ne manipule pas directement les mines. Ainsi, les risques de perte et de casse de mines, ainsi que de salissures sont limités.Therefore, it has been sought to overcome these disadvantages by developing mechanical pencils comprising an interchangeable reservoir of mines, or in other words a cartridge of mines. In these embodiments, the user reloads his mechanical pencil by replacing the empty mine reservoir with a full mine reservoir, in the same way that an ink cartridge is replaced in a fountain pen. This has the advantage that the user, when reloading, does not manipulate mines directly. Thus, the risks of mine loss, breakage and soiling are limited.

A cet égard, on connaît la demande de brevet FR 2 493 769 A1 qui décrit un porte-mine comprenant un réservoir de mines interchangeable. Ce réservoir présente une extrémité à l'intérieur de laquelle a été ménagée une partie annulaire de guidage à laquelle est raccordée un orifice de sortie de mines du réservoir, dont le diamètre à l'état libre est plus petit que le diamètre des mines. Ce porte-mine se caractérise en ce que le mécanisme d'avance de la mine présente un téton qui est conçu pour que vienne s'emboîter la partie annulaire de guidage du réservoir, de telle manière que s'élargisse l'orifice de sortie de mines. Autrement dit, l'emboîtement, par complémentarité de formes, de la partie annulaire de guidage ménagée dans la matière d'une extrémité du réservoir sur le téton produit l'élargissement de l'orifice de sortie de mines.In this respect, the demand for Patent FR 2 493 769 A1 which describes a mechanical pencil comprising an interchangeable mine reservoir. This reservoir has an end inside which has been formed an annular guide portion to which is connected a mine outlet port of the reservoir, whose free diameter is smaller than the diameter of the mines. This mechanical pencil is characterized in that the advance mechanism of the mine has a nipple which is designed so that the annular guide part of the reservoir fits so that the exit orifice of the reservoir widens. mines. In other words, the interlocking, by complementary shapes, of the annular guide portion formed in the material of one end of the reservoir on the nipple produces the enlargement of the mine outlet port.

La réalisation d'une partie annulaire de guidage, ainsi que celle d'un orifice de sortie des mines dans la matière d'une extrémité du réservoir qui sont décrites dans cette demande FR 2 493 769 A1 ne sont pas simples à mettre en oeuvre.The realization of an annular guide portion, as well as that of a mine outlet orifice in the material of an end of the reservoir which are described in this application FR 2 493 769 A1 are not simple to implement.

On connaît en outre le brevet US 5 162 812 qui décrit un porte-mine présentant un corps allongé qui se décompose en une première partie et une deuxième partie, lesdites première et deuxième parties sont configurées pour être reliées entre elles avec un moyen de liaison. De même que le porte-mine décrit dans la demande FR 2 493 769 A1 , le porte-mine décrit dans ce brevet US 5 162 812 comprend un logement conçu pour accueillir un réservoir de mines interchangeable. L'extrémité de sortie de la mine du réservoir est configurée pour que ledit réservoir demeure accouplé au mécanisme d'avance de la mine dès lors que le réservoir a été mis en place dans le logement du porte-mine.In addition, the patent is known US 5,162,812 which discloses a mechanical pencil having an elongate body which is decomposed into a first portion and a second portion, said first and second portions are configured to be interconnected with a connecting means. Like the mechanical pencil described in the application FR 2 493 769 A1 , the mechanical pencil described in this patent US 5,162,812 includes a housing designed to accommodate an interchangeable mine tank. The outlet end of the reservoir mine is configured so that said reservoir remains coupled to the advance mechanism of the mine when the reservoir has been put in place in the housing of the mechanical pencil.

De tels porte-mines à réservoir de mines interchangeable, comme par exemple ceux décrits ci-dessus, comportent ainsi un réservoir de mines qui est accouplé au mécanisme d'avance de la mine. Ces modes de réalisation présentent alors l'inconvénient que le mécanisme d'avance de la mine exerce en permanence des efforts sur le réservoir de mines et peut, à force d'utilisation du porte-mine, abîmer ce réservoir. En effet, le réservoir de mines est mobile lors de l'avancée de la mine par le mécanisme d'avance de la mine, ce qui, du fait de ces sollicitations, tend à user le réservoir de mines.Such interchangeable mine-mine mechanical pencils, such as those described above, thus comprise a mine reservoir which is coupled to the advance mechanism of the mine. These embodiments then have the disadvantage that the advance mechanism of the mine constantly exerts efforts on the mine reservoir and may, by dint of use of the mechanical pencil, damage this reservoir. Indeed, the mine reservoir is movable during the advance of the mine by the advance mechanism of the mine, which, because of these stresses, tends to wear the mine reservoir.

De plus, dans la pratique, l'accouplement entre le mécanisme d'avance de la mine et le réservoir de mines n'est pas toujours aisé à mettre en oeuvre, notamment pour un enfant, ce qui peut conduire à des risques de casse de mine dans le porte-mine lors de l'avancée de la mine.In addition, in practice, the coupling between the advance mechanism of the mine and the mine reservoir is not always easy to implement, especially for a child, which can lead to risks of breakage. mine in the mechanical pencil during the advance of the mine.

Par ailleurs, lors du rechargement du porte-mine, la perception par l'utilisateur d'un accouplement correct ou non du réservoir de mines sur le mécanisme d'avance de la mine est parfois compliquée, voire indétectable, ce qui, en cas d'accouplement défaillant, peut abîmer le porte-mine, tout particulièrement au niveau du mécanisme d'avance ou bien poser des difficultés d'avancée de la mine au fur et à mesure de son usure.Moreover, when reloading the mechanical pencil, the perception by the user of a correct coupling or not of the mine reservoir on the advance mechanism of the mine is sometimes complicated, or even undetectable, which, in case of Coupling failed, can damage the mechanical pencil, particularly at the advance mechanism or pose difficulty in advancing the mine as it wears.

Ainsi, on se rend compte que les solutions actuelles de porte-mine comprenant un réservoir de mines interchangeable ne sont pas pleinement satisfaisantes, les problèmes majeurs résidant dans les difficultés d'utilisation, en particulier pour des enfants, ainsi que dans l'usure prématurée du porte-mine.Thus, it is realized that the current solutions of mechanical pencil comprising an interchangeable mine reservoir are not fully satisfactory, the major problems residing in the difficulties of use, particularly for children, as well as in premature wear of the mechanical pencil.

La présente invention se propose de résoudre les inconvénients détaillés ci-dessus en fournissant un porte-mine qui, pour être rechargé en mines, nécessite simplement de remplacer une cartouche de mines vide par une cartouche de mines pleine. La particularité innovante de ce porte-mine réside dans le fait que le mécanisme d'avance de la mine est découplé de la cartouche de mines. En d'autres termes, lors de l'avancée de la mine, la cartouche de mines demeure statique dans le porte-mine.The present invention proposes to solve the disadvantages detailed above by providing a mechanical pencil which, to be recharged in mines, simply requires to replace an empty mine cartridge with a full mine cartridge. The innovative peculiarity of this mechanical pencil lies in the fact that the advance mechanism of the mine is decoupled from the mine cartridge. In other words, during the advance of the mine, the mine cartridge remains static in the mechanical pencil.

La présente invention a donc pour premier objet un porte-mine présentant un corps allongé qui s'étend selon un axe longitudinal, ledit corps allongé comprend au moins d'amont en aval :

  • un logement conçu pour accueillir une cartouche de mines,
  • un élément d'accouplement configuré lorsqu'il est en position d'engagement pour agrandir une ouverture de sortie de la mine dont est pourvue une extrémité aval que présente la cartouche, et
  • un mécanisme d'avance de la mine,
ledit porte-mine se caractérise en ce que :
  • le corps allongé du porte-mine se décompose en au moins une première partie et une deuxième partie, lesdites première partie et deuxième partie sont configurées pour être reliées entre elles avec un moyen de liaison,
  • l'élément d'accouplement est disposé dans la première partie de manière à ce qu'il soit en position d'engagement lorsque les première partie et deuxième partie sont reliées entre elles avec le moyen de liaison.
The present invention therefore has for its first object a mechanical pencil having an elongate body which extends along a longitudinal axis, said elongate body comprises at least upstream and downstream:
  • a housing designed to accommodate a mine cartridge,
  • a coupling element configured when in the engagement position to enlarge an outlet opening of the mine which is provided with a downstream end that the cartridge has, and
  • a mechanism for advancing the mine,
said pencil is characterized in that:
  • the elongate body of the mechanical pencil is decomposed into at least a first portion and a second portion, said first portion and second portion are configured to be interconnected with a connecting means,
  • the coupling element is arranged in the first part so that it is in the engagement position when the first part and the second part are interconnected with the connecting means.

Du fait que les mines sont contenues dans une cartouche, le rechargement en mines du porte-mine selon l'invention supprime toute manipulation manuelle ou individuelle des mines, généralement à l'origine de perte ou de casse de celles-ci, ainsi que de salissures pour l'utilisateur.Because the mines are contained in a cartridge, reloading mines of the mechanical pencil according to the invention eliminates any manual or individual manipulation of the mines, generally at the origin of loss or breakage thereof, as well as dirt for the user.

La cartouche de mines que l'on insère dans le porte-mine selon l'invention a aussi pour fonction de stocker les mines. Autrement dit, la cartouche de mines est un étui pour les mines avant qu'elles ne soient insérées dans le porte-mine en vue de son rechargement en mines. Ainsi, avec le porte-mine selon l'invention, on remplace la cartouche de mines aussi simplement et rapidement que l'on remplace une cartouche d'encre dans un stylo à plume. Le porte-mine selon l'invention est donc pratique d'utilisation. Cela le rend particulièrement approprié pour qu'il soit utilisé par des enfants.The mine cartridge that is inserted into the mechanical pencil according to the invention also has the function of storing the mines. In other words, the mine cartridge is a holster for mines before they are inserted into the mechanical pencil for reloading mines. Thus, with the mechanical pencil according to the invention, the cartridge of mines is replaced as simply and quickly as one replaces an ink cartridge in a fountain pen. The A mechanical pencil according to the invention is therefore practical to use. This makes it particularly suitable for use by children.

De plus, une fois que la cartouche a été mise en place dans le porte-mine, à savoir que les première et deuxième parties ont été reliées entre elles avec le moyen de liaison de manière à ce que l'élément d'accouplement soit en position d'engagement, la cartouche va demeurer statique au cours de l'avancée de la mine. La mine sort, par gravité, de la cartouche au travers de l'ouverture de sortie de la mine, puis traverse l'élément d'accouplement avantageusement évidé dans sa partie centrale, pour être amenée jusqu'au mécanisme d'avance qui acheminera alors la mine jusqu'à l'orifice de sortie que présente le porte-mine.In addition, once the cartridge has been put in place in the mechanical pencil, that is to say that the first and second parts have been interconnected with the connecting means so that the coupling element is in position. position of engagement, the cartridge will remain static during the advance of the mine. The mine exits, by gravity, the cartridge through the outlet opening of the mine, then passes through the coupling element advantageously hollowed out in its central part, to be brought to the advance mechanism which will then convey the mine to the exit port of the mechanical pencil.

En d'autres termes, et à la différence remarquable des porte-mines de l'art antérieur qui ont été détaillés ci-dessus, dans le porte-mine selon l'invention, le mécanisme d'avance de la mine est complètement dissocié de la cartouche de mines (ou autrement dit le réservoir de mines). Cela présente l'avantage que la cartouche de mines demeurant statique n'est pas sollicitée lors de l'avancée de la mine au moyen du mécanisme d'avance. Cela la protège de l'usure qui pourrait avoir pour conséquence notamment, de trop élargir l'ouverture de sortie de la mine de la cartouche de telle manière que plusieurs cartouches tendent à obstruer cette ouverture de sortie rendant alors inutilisable le porte-mine.In other words, and unlike the remarkable mechanical pencils of the prior art which have been detailed above, in the mechanical pencil according to the invention, the advance mechanism of the mine is completely dissociated from the mine cartridge (or in other words the mine tank). This has the advantage that the mine cartridge remaining static is not requested during the advance of the mine by means of the advance mechanism. This protects it from the wear which could result in particular, too broadening the outlet opening of the cartridge of the mine in such a way that several cartridges tend to obstruct this outlet opening thus rendering unusable the mechanical pencil.

De manière préférée, le moyen de liaison consiste en un moyen choisi dans le groupe constitué par les moyens de vissage, les moyens de clippage et les moyens de raccordement à baïonnette.Preferably, the connecting means consists of a means selected from the group consisting of the screwing means, the clipping means and the bayonet connection means.

Dans un mode de réalisation de l'invention, l'élément d'accouplement présente une base et une surface de contact tronconique, de préférence tronconique divergent d'amont en aval. La surface de contact tronconique est configurée pour venir en contact avec l'extrémité aval de la cartouche lorsque les première et deuxième parties du corps allongé du porte-mine ont été reliées entre elle avec le moyen de liaison. Cette surface de contact présentant une forme tronconique est particulièrement appropriée pour agrandir l'ouverture de sortie de la mine de la cartouche.In one embodiment of the invention, the coupling element has a base and a frustoconical contact surface, preferably frustoconical diverging from upstream to downstream. The frustoconical contact surface is configured to contact the downstream end of the cartridge when the first and second portions of the elongate body of the mechanical pencil have been interconnected with the connecting means. This contact surface having a frustoconical shape is particularly suitable for enlarging the outlet opening of the mine of the cartridge.

Dans un mode de réalisation de l'invention, l'élément d'accouplement est solidaire de la première partie du corps allongé du porte-mine. En d'autres termes, l'élément d'accouplement vient de matière avec la première partie du corps allongé du porte-mine. Pour ce faire, l'élément d'accouplement peut avoir été moulé ou surmoulé dans ladite première partie. Cela présente l'avantage de supprimer une pièce, ainsi qu'une étape d'assemblage du porte-mine selon l'invention.In one embodiment of the invention, the coupling element is integral with the first part of the elongated body of the mechanical pencil. In other words, the coupling element is made of material with the first part of the elongate body of the mechanical pencil. To do this, the element coupling may have been molded or overmoulded in said first part. This has the advantage of removing a part, as well as a step of assembly of the mechanical pencil according to the invention.

Dans un mode de réalisation de l'invention, le corps allongé présente une paroi latérale s'étendant selon l'axe longitudinal. Avantageusement, dans le tronçon de la paroi latérale de la première partie du corps allongé est ménagé un épaulement interne pour délimiter une section de passage qui est inférieure à la section transversale de la base de l'élément d'accouplement. Cet épaulement interne permet de disposer l'élément d'accouplement dans la première partie du corps allongé du porte-mine. Dans ce mode de réalisation, l'élément d'accouplement se présente sous la forme d'une pièce distincte du reste du porte-mine et peut avoir été soudé, collé ou bien encore clippé dans la première partie du porte-mine au niveau de cet épaulement interne. Bien entendu, tout autre mode de fixation de l'élément d'accouplement que ceux précités et à la portée de l'homme du métier est envisageable. Ce mode de réalisation présente l'avantage que l'élément d'accouplement peut avoir été fabriqué de manière adéquate et être constitué d'un matériau particulièrement approprié pour qu'il agrandisse l'ouverture de sortie de la mine de la cartouche une fois que les première et deuxième parties du corps allongé du porte-mine ont été reliées entre elles. Par exemple, l'élément d'accouplement pourra comprendre un matériau plus rigide que le reste du porte-mine.In one embodiment of the invention, the elongate body has a side wall extending along the longitudinal axis. Advantageously, in the section of the side wall of the first part of the elongate body is provided an internal shoulder to define a passage section which is smaller than the cross section of the base of the coupling element. This internal shoulder makes it possible to arrange the coupling element in the first part of the elongated body of the mechanical pencil. In this embodiment, the coupling element is in the form of a separate part of the rest of the mechanical pencil and may have been welded, glued or even clipped into the first part of the mechanical pencil at the level of this internal shoulder. Of course, any other method of attachment of the coupling element than those mentioned above and within the reach of those skilled in the art is conceivable. This embodiment has the advantage that the coupling element may have been suitably manufactured and be made of a material particularly suitable for enlarging the outlet opening of the cartridge barrel once the first and second parts of the elongate body of the mechanical pencil have been interconnected. For example, the coupling member may comprise a more rigid material than the rest of the mechanical pencil.

De préférence, le corps allongé du porte-mine est tubulaire.Preferably, the elongated body of the mechanical pencil is tubular.

Le corps allongé du porte-mine est réalisé dans un matériau plastique. De préférence, ce matériau plastique est choisi dans le groupe constitué par les polystyrènes et les polycarbonates.The elongated body of the mechanical pencil is made of a plastic material. Preferably, this plastic material is selected from the group consisting of polystyrenes and polycarbonates.

Dans un mode de réalisation de l'invention, le mécanisme d'avance est pourvu d'un bouton poussoir, de préférence un bouton poussoir latéral, configuré pour actionner le mécanisme d'avance.In one embodiment of the invention, the feed mechanism is provided with a push button, preferably a lateral push button, configured to operate the feed mechanism.

Le mécanisme d'avance peut être un mécanisme d'avance d'un porte-mine tel que celui décrit dans l'un des documents de brevet suivants :

  • la demande de brevet US 2011/0229245 A1,
  • la demande de brevet EP 0 806 305 B1 ,
  • la demande de brevet FR 2 861 330 A1 ,
  • le brevet US 6 758 617 B2 .
The advance mechanism may be a mechanism for advancing a mechanical pencil such as that described in one of the following patent documents:
  • US patent application 2011/0229245 A1,
  • the request for EP patent 0 806 305 B1 ,
  • the request for FR 2 861 330 A1 ,
  • the US Patent 6,758,617 B2 .

La présente invention a pour autre objet une cartouche de mines conçue pour être insérée dans le porte-mine tel que décrit ci-dessus. Cette cartouche comporte au moins un logement amont conçu pour accueillir des mines et l'extrémité aval qui présente l'ouverture de sortie de la mine, ladite cartouche comporte une paroi latérale s'étendant selon l'axe longitudinal, le tronçon de la paroi latérale de l'extrémité aval se décompose en au moins :

  • un premier tronçon dont la section transversale décroît d'amont en aval,
  • un deuxième tronçon dont la section transversale croît d'amont en aval,
ladite cartouche se caractérise en ce que le tronçon de la paroi latérale de l'extrémité aval présente des fentes s'étendant sensiblement selon l'axe longitudinal.Another object of the present invention is a mine cartridge designed to be inserted into the mechanical pencil as described above. This cartridge has at least one upstream housing designed to accommodate mines and the downstream end which has the mine exit opening, said cartridge has a side wall extending along the longitudinal axis, the sidewall section. the downstream end breaks down into at least:
  • a first section whose cross section decreases from upstream to downstream,
  • a second section whose cross section increases from upstream to downstream,
said cartridge is characterized in that the section of the side wall of the downstream end has slots extending substantially along the longitudinal axis.

Les fentes que comporte la cartouche selon l'invention présente l'avantage d'améliorer la déformation, ou autrement dit l'agrandissement, de la section transversale de l'extrémité aval de la cartouche, ainsi que celle de l'ouverture de sortie de la mine, lorsque l'élément d'accouplement est en position d'engagement quand les première et deuxième parties du corps allongé du porte-mine ont été reliées entre elles.The slots that comprise the cartridge according to the invention has the advantage of improving the deformation, or in other words the enlargement, of the cross section of the downstream end of the cartridge, as well as that of the exit opening of the cartridge. the mine, when the coupling element is in the engagement position when the first and second parts of the elongated body of the mechanical pencil have been interconnected.

L'orifice de sortie de la mine de la cartouche se trouve entre le premier tronçon et le deuxième tronçon de la paroi latérale de l'extrémité aval de la cartouche.The cartridge outlet port is between the first section and the second section of the side wall of the downstream end of the cartridge.

Cette forme de réalisation du tronçon de la paroi latérale de l'extrémité aval est particulièrement avantageuse pour limiter le risque de casse et de pertes des mines en cas de démontages intempestifs du porte-mine dans lequel est insérée la cartouche selon l'invention.This embodiment of the section of the side wall of the downstream end is particularly advantageous to limit the risk of breakage and loss of mines in case of inadvertent disassembly of the mechanical pencil in which is inserted the cartridge according to the invention.

De plus, cette forme de l'extrémité aval de la cartouche est particulièrement appropriée, lorsque l'élément d'accouplement présente une surface de contact tronconique divergent d'amont en aval. En effet, cette surface vient en contact avec le deuxième tronçon de la paroi de l'extrémité aval de la cartouche, lorsque la première partie et la deuxième partie du corps allongé du porte-mine sont reliées entre elles, de manière à agrandir la section transversale de ce deuxième tronçon de la paroi latérale de l'extrémité aval de la cartouche ainsi que l'orifice de sortie de la mine qui se situe entre ledit premier tronçon et ledit deuxième tronçon.In addition, this form of the downstream end of the cartridge is particularly suitable when the coupling element has a frustoconical contact surface diverging from upstream to downstream. Indeed, this surface comes into contact with the second section of the wall of the downstream end of the cartridge, when the first portion and the second portion of the elongate body of the mechanical pencil are interconnected, so as to enlarge the section. cross section of this second section of the side wall of the downstream end of the cartridge and the outlet port of the mine between said first section and said second section.

En comparaison avec la cartouche de mines décrite dans la demande de brevet FR 2 493 769 A1 qui a été mentionnée ci-dessus, la réalisation de l'extrémité aval de cette cartouche selon l'invention est plus simple à réaliser. En effet, cette forme de réalisation de la paroi latérale de l'extrémité aval se décomposant en au moins les deux tronçons tels que décrits ci-dessus est plus aisée à fabriquer que la partie annulaire de guidage ménagée dans la matière de la cartouche décrite dans la demande FR 2 493 769 A1 . Ainsi, la fabrication de la cartouche selon l'invention est plus simple de mise en oeuvre tout en fournissant à ladite cartouche une certaine solidité qui évite tout risque de casse de cette extrémité aval de laquelle sortent les mines.In comparison with the mine cartridge described in the patent application FR 2 493 769 A1 which has been mentioned above, the realization of the downstream end of this cartridge according to the invention is simpler to achieve. Indeed, this embodiment of the side wall of the downstream end decomposing into at least the two sections as described above is easier to manufacture than the annular guide portion formed in the material of the cartridge described in Requirement FR 2 493 769 A1 . Thus, the manufacture of the cartridge according to the invention is simpler to implement while providing the cartridge with a certain strength that avoids any risk of breakage of the downstream end of which the mines come out.

Dans un mode de réalisation de l'invention, le tronçon de la paroi latérale de l'extrémité aval comprend en outre un tronçon intermédiaire de section transversale constante entre le premier tronçon et le deuxième tronçon.In one embodiment of the invention, the section of the side wall of the downstream end further comprises an intermediate section of constant cross section between the first section and the second section.

Dans un mode de réalisation préféré de l'invention, le tronçon de la paroi latérale de l'extrémité aval est en un matériau semi-rigide à mémoire de forme. De préférence, ce matériau semi-rigide à mémoire de forme est choisi dans le groupe constitué par le polyméthacrylate de méthyle (PMMA), le copolymère de polyacétal (POM-C), les polyuréthanes, les polyamides et les polyoléfines telles que le polyéthylène et le polypropylène.In a preferred embodiment of the invention, the section of the side wall of the downstream end is made of a semi-rigid shape memory material. Preferably, this semi-rigid shape-memory material is selected from the group consisting of polymethyl methacrylate (PMMA), polyacetal copolymer (POM-C), polyurethanes, polyamides and polyolefins such as polyethylene and polypropylene.

Lorsque la cartouche est retirée du porte-mine, l'ouverture de sortie de la mine retrouve, grâce à la mémoire de forme du matériau, un diamètre inférieur au diamètre de la mine, de manière à empêcher la sortie de mines encore présentes dans la cartouche. Ainsi, l'utilisateur pourra aisément changer de cartouche de mines en remplaçant une cartouche de mines pas encore vide par une autre cartouche, par exemple par une cartouche contenant des mines de dureté ou de couleur différentes, et ce sans le risque de perdre des mines au cours de ce rechargement du porte-mine selon l'invention.When the cartridge is removed from the mechanical pencil, the outlet opening of the mine finds, thanks to the shape memory of the material, a diameter smaller than the diameter of the mine, so as to prevent the exit of mines still present in the mine. cartridge. Thus, the user can easily change the cartridge of mines by replacing a mine cartridge not yet empty by another cartridge, for example by a cartridge containing mines of different hardness or color, without the risk of losing mines during this reloading of the mechanical pencil according to the invention.

En d'autres termes, la cartouche selon l'invention n'est pas conçue pour un unique modèle de mines, mais elle pourra servir d'étui de mines de différents types de mines. Cela est aussi particulièrement avantageux d'un point de vue économique.In other words, the cartridge according to the invention is not designed for a single model of mines, but it can serve as a holster of mines of different types of mines. This is also particularly advantageous from an economic point of view.

Avantageusement, la cartouche présente une extrémité amont qui est fermée.Advantageously, the cartridge has an upstream end which is closed.

Selon des modes de réalisation de l'invention :

  • L'extrémité amont est fermée par un capuchon amovible.
  • Le capuchon amovible peut consister en une gomme. La gomme est avantageusement insérée à force dans l'extrémité amont de la cartouche.
  • Ou bien, l'extrémité amont est fermée par un capuchon amovible qui comprend une gomme.
According to embodiments of the invention:
  • The upstream end is closed by a removable cap.
  • The removable cap may consist of an eraser. The rubber is advantageously inserted by force into the upstream end of the cartridge.
  • Or, the upstream end is closed by a removable cap which comprises an eraser.

Ces modes de réalisation de la cartouche de mines équipée d'une gomme présentent l'avantage qu'à chaque remplacement de cartouche, le porte-mine selon l'invention comporte une gomme neuve.These embodiments of the mine cartridge equipped with a rubber have the advantage that each cartridge replacement, the mechanical pencil according to the invention comprises a new eraser.

Dans un mode de réalisation particulièrement avantageux de l'invention, l'extrémité amont de la cartouche est fermée par une gomme.In a particularly advantageous embodiment of the invention, the upstream end of the cartridge is closed by a rubber.

Aussi, pour ces modes de réalisation de l'invention où l'extrémité amont de la cartouche est ouverte et peut être bouchée, par exemple par un capuchon amovible, lorsque la cartouche est vide, il peut être envisagé de la réapprovisionner en mines en les insérant directement par l'extrémité amont débouchée de ladite cartouche. En d'autres termes, la cartouche vide est réutilisable.Also, for these embodiments of the invention where the upstream end of the cartridge is open and can be plugged, for example by a removable cap, when the cartridge is empty, it can be considered to replenish mines in them. inserting directly through the open end end of said cartridge. In other words, the empty cartridge is reusable.

Dans un mode de réalisation de l'invention, la cartouche présente une forme générale cylindrique.In one embodiment of the invention, the cartridge has a generally cylindrical shape.

La cartouche est avantageusement réalisée en un matériau plastique. De préférence, le matériau plastique est choisi dans le groupe constitué par le polyméthacrylate de méthyle (PMMA), le copolymère de polyacétal (POM-C), les polyuréthanes, les polyamides, les polyoléfines telles que le polyéthylène et le polypropylène.The cartridge is advantageously made of a plastic material. Preferably, the plastic material is selected from the group consisting of polymethyl methacrylate (PMMA), polyacetal copolymer (POM-C), polyurethanes, polyamides, polyolefins such as polyethylene and polypropylene.

Dans un mode de réalisation de l'invention, la cartouche de mines selon l'invention est monobloc.In one embodiment of the invention, the mine cartridge according to the invention is monobloc.

La cartouche selon l'invention peut être monobloc et présenter une extrémité amont fermée par un capuchon amovible ou une gomme.The cartridge according to the invention may be in one piece and have an upstream end closed by a removable cap or a rubber.

La présente invention a pour autre objet un instrument d'écriture comprenant un porte-mine tel que décrit ci-dessus et une cartouche de mines telle que décrite ci-dessus, optionnellement ladite cartouche est remplie de mines.Another object of the present invention is a writing instrument comprising a mechanical pencil as described above and a mine cartridge as described above, optionally said cartridge is filled with mines.

La mine peut être une mine en graphite ou bien aussi une mine comprenant au moins un pigment coloré. Ainsi, le porte-mine et la cartouche selon l'invention peuvent être appropriés aussi bien pour accueillir des mines en graphite (par exemple de diamètre compris entre 0,3 et 1,2 mm) que des mines colorées qui sont généralement constituées d'un mélange de pigments, d'argile et de gomme ou de résine. Ces mines en graphite ou colorées peuvent présenter des duretés différentes.The mine may be a graphite mine or a mine comprising at least one colored pigment. Thus, the mechanical pencil and the cartridge according to the invention can be suitable both to accommodate graphite mines (for example with a diameter of between 0.3 and 1.2 mm) and colored mines which generally consist of a mixture of pigments, clay and gum or resin. These graphite or colored mines may have different hardnesses.

D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description qui va suivre, donnée à titre d'exemple non limitatif, en référence aux dessins annexés dans lesquels :

  • La figure 1 est une vue en coupe longitudinale d'une cartouche de mines selon l'invention.
  • La figure 2 est une vue en perspective de l'insertion de la cartouche de la figure 1 dans la deuxième partie du corps allongé d'un porte-mine selon l'invention.
  • La figure 3 est une vue en perspective du porte-mine et de la cartouche représentés à la figure 2 lorsque la cartouche de mines a été mise en place dans le porte-mine.
  • La figure 4 est une vue en coupe longitudinale du porte-mine et de la cartouche représentés à la figure 3.
  • La figure 5a est une vue en coupe longitudinale et en agrandissement d'une partie du porte-mine et de la cartouche représentés aux figures 3 et 4 lorsque la cartouche est dans la position de repos.
  • La figure 5b est une vue en coupe longitudinale et en agrandissement d'une partie du porte-mine et de la cartouche représentés aux figures 3 et 4 lorsque la cartouche est dans une position d'utilisation.
Other features and advantages of the invention will become apparent from the following description, given by way of non-limiting example, with reference to the appended drawings in which:
  • The figure 1 is a longitudinal sectional view of a mine cartridge according to the invention.
  • The figure 2 is a perspective view of the insertion of the cartridge from the figure 1 in the second part of the elongated body of a mechanical pencil according to the invention.
  • The figure 3 is a perspective view of the mechanical pencil and cartridge shown in figure 2 when the mine cartridge was put in place in the mechanical pencil.
  • The figure 4 is a longitudinal sectional view of the mechanical pencil and the cartridge shown in FIG. figure 3 .
  • The figure 5a is a view in longitudinal section and in enlargement of a part of the mechanical pencil and the cartridge represented in Figures 3 and 4 when the cartridge is in the rest position.
  • The figure 5b is a view in longitudinal section and in enlargement of a part of the mechanical pencil and the cartridge represented in Figures 3 and 4 when the cartridge is in a use position.

La cartouche 1 représentée sur les figures s'étend un axe longitudinal X. La cartouche 1 comporte un corps tubulaire 2 qui présente un logement amont 16 conçu pour pouvoir accueillir des mines 4. Le corps tubulaire 2 de la cartouche 1 présente une forme générale cylindrique.The cartridge 1 shown in the figures extends a longitudinal axis X. The cartridge 1 comprises a tubular body 2 which has an upstream housing 16 designed to accommodate mines 4. The tubular body 2 of the cartridge 1 has a generally cylindrical shape .

La cartouche 1 comprend une extrémité aval 2a qui présente une ouverture de sortie 5 de la mine 4.The cartridge 1 comprises a downstream end 2a which has an outlet opening 5 of the mine 4.

La cartouche 1 présente une paroi latérale 29 s'étendant selon l'axe longitudinal X. Le tronçon de la paroi 29 de l'extrémité aval 2a se décompose en:

  • un premier tronçon 29b dont la section transversale décroît d'amont en aval,
  • un deuxième tronçon 29a dont la section transversale croît d'amont en aval,
  • ainsi que d'un tronçon intermédiaire 29c de section transversale constante qui est disposé entre ledit premier tronçon 29b et ledit deuxième tronçon 29a.
The cartridge 1 has a side wall 29 extending along the longitudinal axis X. The section of the wall 29 of the downstream end 2a is decomposed into:
  • a first section 29b whose cross section decreases from upstream to downstream,
  • a second section 29a whose cross section increases from upstream to downstream,
  • as well as an intermediate section 29c of constant cross section which is disposed between said first section 29b and said second section 29a.

En outre, comme cela est visible sur la figure 2, le tronçon de la paroi latérale 29 de l'extrémité aval 2a présente des fentes 23 s'étendant selon l'axe longitudinal X. Cela présente l'avantage d'améliorer la déformation, à savoir l'agrandissement de la section transversale de l'extrémité aval 2a de la cartouche 1, ainsi que celle de l'ouverture de sortie 5 de la mine 4, lorsque des contraintes sont exercées sur cette extrémité 2a de la cartouche 1.Moreover, as is visible on the figure 2 , the section of the side wall 29 of the downstream end 2a has slots 23 extending along the longitudinal axis X. This has the advantage of improving the deformation, namely the enlargement of the cross section of the 2a downstream end of the cartridge 1, and that of the outlet opening 5 of the mine 4, when stresses are exerted on this end 2a of the cartridge 1.

La cartouche 1 présente en outre une extrémité amont 2b qui est fermée par une gomme 3.The cartridge 1 further has an upstream end 2b which is closed by an eraser 3.

Sur la figure 1, la section de l'ouverture de sortie 5 est dans une position de repos. Cela signifie que dans cette position, la section de l'ouverture de sortie 5 est inférieure au diamètre de la mine 4 de manière à ce qu'elle empêche la sortie des mines 4 hors du logement amont 16 au travers de ladite ouverture de sortie 5 de la mine 4 de la cartouche 1.On the figure 1 the section of the outlet opening 5 is in a rest position. This means that in this position, the section of the outlet opening 5 is smaller than the diameter of the mine 4 so that it prevents the exit of the mines 4 from the upstream housing 16 through said outlet opening 5 of mine 4 of cartridge 1.

Sur les figures 3 et 4 est représenté un porte-mine 8 selon l'invention dans lequel a été mise en place la cartouche 1 représentée à la figure 1.On the Figures 3 and 4 is shown a mechanical pencil 8 according to the invention in which the cartridge 1 shown in FIG. figure 1 .

Le porte-mine 8 présente un corps tubulaire 17 qui s'étend selon l'axe longitudinal X qui comporte un logement 28 conçu pour accueillir la cartouche 1 de mines 4.The mechanical pencil 8 has a tubular body 17 which extends along the longitudinal axis X which comprises a housing 28 designed to receive the cartridge 1 of mines 4.

Le corps tubulaire 17 se décompose en :

  • une première partie 9 qui comporte un mécanisme d'avance 11 d'une mine 4 et un bouton poussoir latéral 7 configuré pour actionner le mécanisme d'avance 11. La première partie 9 présente en outre un logement aval 24 conçu pour accueillir une partie de la cartouche 1.
  • une deuxième partie 10 qui comprend un logement amont 19 conçu pour accueillir le reste de la cartouche 1 faisant saillie de la première partie 9 lorsque les première partie 9 et deuxième partie 10 sont reliées entre elles.
The tubular body 17 is broken down into:
  • a first portion 9 which comprises a feed mechanism 11 of a mine 4 and a lateral push button 7 configured to actuate the feed mechanism 11. The first portion 9 further has a downstream housing 24 designed to accommodate a portion of the cartridge 1.
  • a second portion 10 which comprises an upstream housing 19 designed to accommodate the remainder of the cartridge 1 projecting from the first portion 9 when the first portion 9 and second portion 10 are interconnected.

Autrement dit, le logement 28 se décompose en le logement aval 24 et le logement amont 19 du corps tubulaire 17.In other words, the housing 28 is decomposed into the downstream housing 24 and the upstream housing 19 of the tubular body 17.

La première partie 9 et la deuxième partie 10 sont reliées entre elles avec un moyen de liaison 18. Plus précisément, la deuxième partie 10 présente une extrémité aval 10a qui est pourvue d'un filetage extérieur 18b qui est particulièrement visible sur la figure 2. La première partie 9 présente une extrémité amont 9b qui est pourvue d'un filetage interne 18a (visible uniquement sur la figure 4) conçu pour coopérer avec le filetage extérieur 18b. Le moyen de liaison 18 est un moyen de vissage.The first portion 9 and the second portion 10 are interconnected with a connecting means 18. More specifically, the second portion 10 has a downstream end 10a which is provided with an external thread 18b which is particularly visible on the figure 2 . The first part 9 has an upstream end 9b which is provided with an internal thread 18a (visible only on the figure 4 ) designed to cooperate with the external thread 18b. The connecting means 18 is a screwing means.

Le corps tubulaire 17 du porte-mine 8 présente une forme générale cylindrique.The tubular body 17 of the mechanical pencil 8 has a generally cylindrical shape.

Comme cela est visible aux figures 2 à 4, l'extrémité amont 10b de la deuxième partie 10 du corps tubulaire 17 du porte-mine 8 comporte un orifice 25 duquel fait saillie la gomme 3 lorsque la cartouche 1 est logée entièrement dans le logement amont 19 et le logement aval 24.As can be seen in Figures 2 to 4 , the upstream end 10b of the second part 10 of the tubular body 17 of the mechanical pencil 8 comprises an orifice 25 from which the rubber 3 protrudes when the cartridge 1 is housed entirely in the upstream housing 19 and the downstream housing 24.

La première partie 9 présente une extrémité aval 9a qui comporte un orifice de sortie 22 d'une mine 4, ainsi qu'une pointe guide-mine 15.The first part 9 has a downstream end 9a which has an outlet orifice 22 of a mine 4 and a guide-tip tip 15.

Dans le mode de réalisation du porte-mine 8 représenté sur les figures 3 et 4, le mécanisme d'avance 11 de la mine 4 comprend un organe mobile 12 qui est prolongé par une pince 13 autour de laquelle est enroulé un ressort 14. L'organe mobile 12 est monté coulissant selon l'axe longitudinal X dans la première partie 9 du corps tubulaire 17 du porte-mine et est actionné par le bouton poussoir latéral 7. Le mécanisme d'avance 11 actionné par un bouton poussoir latéral 7 est un mécanisme classique d'un porte-mine et est parfaitement à la portée de l'homme du métier.In the embodiment of the mechanical pencil 8 shown on the Figures 3 and 4 , the advance mechanism 11 of the mine 4 comprises a movable member 12 which is extended by a clamp 13 around which is wound a spring 14. The movable member 12 is slidably mounted along the longitudinal axis X in the first part 9 of the tubular body 17 of the mechanical pencil and is actuated by the lateral push button 7. The advance mechanism 11 actuated by a lateral push button 7 is a conventional mechanism of a mechanical pencil and is perfectly within the reach of the skilled person.

Le corps tubulaire 17 du porte-mine 8 présente une paroi latérale 31 qui s'étend selon l'axe longitudinal X.The tubular body 17 of the mechanical pencil 8 has a lateral wall 31 which extends along the longitudinal axis X.

Dans le tronçon de la paroi latérale 31 de la première partie 9 du corps tubulaire 17 est ménagé un épaulement interne 20. Cet épaulement interne 20 délimite une section de passage 26 configurée pour bloquer un élément d'accouplement 6 dans la première partie 9. L'élément d'accouplement 6 est une pièce distincte du porte-mine 8 qui a été soudé au niveau de l'épaulement interne 20.In the portion of the side wall 31 of the first portion 9 of the tubular body 17 is provided an internal shoulder 20. This internal shoulder 20 delimits a passage section 26 configured to lock a coupling element 6 in the first portion 9. L coupling element 6 is a separate part of the mechanical pencil 8 which has been welded at the internal shoulder 20.

L'élément d'accouplement 6 présente un évidement 21 s'étendant selon l'axe longitudinal X qui est configuré pour qu'une mine 4, par gravité, passe au travers de l'élément d'accouplement 6 et atteigne le mécanisme d'avance 11 de la mine 4.The coupling element 6 has a recess 21 extending along the longitudinal axis X which is configured so that a mine 4, by gravity, passes through the coupling element 6 and reaches the mechanism of advance 11 of mine 4.

L'élément d'accouplement 6 comporte une base 27 et une surface de contact 33 qui est tronconique divergente d'amont en aval. Cette surface de contact 33 se décompose en une pluralité d'ailettes 6a.The coupling element 6 comprises a base 27 and a contact surface 33 which is frustoconical divergent from upstream to downstream. This contact surface 33 is broken down into a plurality of fins 6a.

L'élément d'accouplement 6 est configuré pour être accouplé à la cartouche 1, de manière à ce que lorsque la cartouche 1 est entièrement logée dans le logement amont 19 et le logement aval 24 et que les première partie 9 et deuxième partie 10 ont été vissées entre elles, la cartouche 1 est dans une position d'utilisation dans laquelle les mines 4 sortent une par une par gravité hors du logement amont 16 au travers de l'ouverture de sortie 5 de la cartouche 1. Cette position d'utilisation est représentée sur les figures 4 et 5b.The coupling element 6 is configured to be coupled to the cartridge 1, so that when the cartridge 1 is fully housed in the upstream housing 19 and the downstream housing 24 and the first part 9 and second part 10 have have been screwed together, the cartridge 1 is in a position of use in which the mines 4 out one by one by gravity out of the upstream housing 16 through the outlet opening 5 of the cartridge 1. This position of use is represented on the figures 4 and 5b .

Comme cela est visible sur la figure 5b, lorsque l'élément d'accouplement 6 est en position d'engagement, l'extrémité aval 2a de la cartouche 1 est en contact avec les ailettes 6a de l'élément d'accouplement 6 qui élargissent la section transversale du deuxième tronçon 29a de la paroi latérale 29 de cette extrémité aval 2a. L'élément d'accouplement 6 vient progressivement en contact avec l'extrémité aval 2a de la cartouche 1 au fur et à mesure que la première partie 9 est vissée sur la deuxième partie 10, ce qui a pour conséquence d'agrandir progressivement la section de l'ouverture de sortie 5 de la mine 4 la cartouche 1. Ainsi, grâce à cette mise en contact progressive, l'extrémité aval 2a de la cartouche 1 est ménagée et les risques d'usure prématurée de la cartouche 1 sont ainsi évités.As is visible on the figure 5b when the coupling element 6 is in the engagement position, the downstream end 2a of the cartridge 1 is in contact with the fins 6a of the coupling element 6 which widen the cross section of the second section 29a of the side wall 29 of this downstream end 2a. The coupling element 6 comes into progressive contact with the downstream end 2a of the cartridge 1 as the first part 9 is screwed onto the second part 10, which has the effect of progressively enlarging the section. the outlet opening 5 of the mine 4 the cartridge 1. Thus, thanks to this progressive contact, the downstream end 2a of the cartridge 1 is formed and the risk of premature wear of the cartridge 1 are thus avoided .

De par la configuration du porte-mine 8 selon l'invention qui a été décrite ci-dessus, son rechargement en mines 4 est simple et rapide à effectuer et est parfaitement à la portée d'un enfant.By the configuration of the mechanical pencil 8 according to the invention which has been described above, reloading mines 4 is simple and quick to perform and is perfectly within reach of a child.

Sur les figures 3 et 4 est représenté un instrument d'écriture 30 qui comprend un porte-mine 8 et une cartouche 1 remplie de mines 4.On the Figures 3 and 4 there is shown a writing instrument 30 which comprises a mechanical pencil 8 and a cartridge 1 filled with mines 4.

Par exemple dans un mode de réalisation de l'invention, il suffit pour l'utilisateur du porte-mine 8 :

  1. a) de dévisser la première partie 9 de la deuxième partie 10 du corps tubulaire 17 du porte-mine 8, puis
  2. b) d'extraire du logement amont 19 de la deuxième partie 10 la cartouche 1 de mines 4 vide.
  3. c) ensuite, comme cela est représenté sur la figure 2 par la flèche, l'utilisateur insère une cartouche 1 remplie de mines 4 dans le logement amont 19 de la deuxième partie 10, puis
  4. d) visse la première partie 9 sur la deuxième partie 10.
For example, in one embodiment of the invention, it suffices for the user of the mechanical pencil 8:
  1. a) to unscrew the first part 9 of the second part 10 of the tubular body 17 of the mechanical pencil 8, then
  2. b) extracting from the upstream housing 19 of the second part 10 empty cartridge 1 mines 4.
  3. (c) then, as shown on the figure 2 by the arrow, the user inserts a cartridge 1 filled with mines 4 in the upstream housing 19 of the second part 10, then
  4. d) screws the first part 9 on the second part 10.

Comme cela est représenté sur la figure 5b qui représente de manière agrandie une partie du porte-mine 8 représenté à la figure 4, une fois le vissage des première partie 9 et deuxième partie 10 réalisé, l'élément d'accouplement 6 est en position d'engagement, de manière à ce que la cartouche 1 soit dans la position d'utilisation dans laquelle les mines 4 peuvent sortir une par une par gravité hors du logement 16 au travers de l'ouverture de sortie 5 de la cartouche 1.As shown on the figure 5b which magnificently represents a portion of the mechanical pencil 8 shown in figure 4 , once the screwing of the first part 9 and second part 10 realized, the element 6 is in the engagement position, so that the cartridge 1 is in the use position in which the mines 4 can out one by one by gravity out of the housing 16 through the outlet opening 5 of the cartridge 1.

Il est à noter que dans ce mode de réalisation, afin de faciliter l'extraction de la cartouche 1 de mines 4 du porte-mine 8, la cartouche 1 et le porte-mine 8 ont été conçus pour que, lorsque les première partie 9 et deuxième partie 10 de ce corps tubulaire 17 ont été dévissées, l'extrémité aval 2a de la cartouche 1 fait saillie de l'extrémité aval 10a de la deuxième partie 10 du corps tubulaire 17. De cette manière, l'utilisateur peut aisément saisir la cartouche 1.It should be noted that in this embodiment, in order to facilitate the extraction of the cartridge 1 from mines 4 of the mechanical pencil 8, the cartridge 1 and the mechanical pencil 8 have been designed so that, when the first part 9 and second part 10 of this tubular body 17 have been unscrewed, the downstream end 2a of the cartridge 1 protrudes from the downstream end 10a of the second part 10 of the tubular body 17. In this way, the user can easily grasp the cartridge 1.

Dans un autre mode de réalisation de l'invention envisageable, la cartouche 1 et le porte-mine peuvent être conçus de telle manière que lorsque les première partie 9 et deuxième partie 10 du corps tubulaire 17 du porte-mine 8 ont été dévissées, la cartouche 1 demeure fixée sur l'élément d'accouplement 6. Ainsi, la cartouche 1 fait saillie de l'extrémité amont 9b de la première partie 9 du corps tubulaire 17 du porte-mine 8 pour pouvoir être aisément saisie par son utilisateur lors du remplacement de la cartouche 1 de mines 4.In another embodiment of the invention that can be envisaged, the cartridge 1 and the mechanical pencil may be designed in such a way that when the first part 9 and second part 10 of the tubular body 17 of the mechanical pencil 8 have been unscrewed, the cartridge 1 remains attached to the coupling element 6. Thus, the cartridge 1 protrudes from the upstream end 9b of the first portion 9 of the tubular body 17 of the mechanical pencil 8 to be easily grasped by its user during the replacement of cartridge 1 of mines 4.

La figure 5a représente aussi de manière agrandie une partie du porte-mine 8 avant que l'élément d'accouplement 6 ne soit accouplé à la cartouche 1.The figure 5a also enlarges a part of the mechanical pencil 8 before the coupling element 6 is coupled to the cartridge 1.

Bien entendu, la présente invention ne se limite pas à ce mode de réalisation de cartouche 1 et de porte-mine 8 représentés sur les figures mais couvre d'autres modes de réalisation pouvant mettant en oeuvre, par exemple, d'autres formes de réalisation de l'élément d'accouplement 6, de l'extrémité aval 2a de la cartouche 1 ou encore du mécanisme d'avance 11 de la mine 4.Of course, the present invention is not limited to this embodiment of cartridge 1 and pencil 8 shown in the figures but covers other embodiments that can implement, for example, other embodiments. the coupling element 6, the downstream end 2a of the cartridge 1 or the feed mechanism 11 of the mine 4.

Claims (9)

Porte-mine (8) présentant un corps allongé (17) qui s'étend selon un axe longitudinal (X), ledit corps allongé (17) comprend au moins d'amont en aval : - un logement (28) conçu pour accueillir une cartouche (1) de mines (4), - un élément d'accouplement (6) configuré lorsqu'il est en position d'engagement pour agrandir une ouverture de sortie (5) de la mine (4) dont est pourvue une extrémité aval (2a) que présente la cartouche (1), et - un mécanisme d'avance (11) de la mine (4), caractérisé en ce que : • le corps allongé (17) du porte-mine (8) se décompose en au moins une première partie (9) et une deuxième partie (10), lesdites première partie (9) et deuxième partie (10) sont configurées pour être reliées entre elles avec un moyen de liaison (18), • l'élément d'accouplement (6) est disposé dans la première partie (9) de manière à ce qu'il soit en position d'engagement lorsque les première partie (9) et deuxième partie (10) sont reliées entre elles avec le moyen de liaison (18). A mechanical pencil (8) having an elongated body (17) extending along a longitudinal axis (X), said elongated body (17) comprises at least upstream and downstream: a housing (28) designed to accommodate a cartridge (1) of mines (4), - a coupling element (6) configured when in engagement position to enlarge an outlet opening (5) of the mine (4) which is provided with a downstream end (2a) that has the cartridge (1) , and an advance mechanism (11) for the mine (4), characterized in that The elongate body (17) of the mechanical pencil (8) is decomposed into at least a first part (9) and a second part (10), the said first part (9) and the second part (10) are configured to be connected between them with a connecting means (18), The coupling element (6) is arranged in the first part (9) so that it is in the engagement position when the first part (9) and the second part (10) are connected to each other with the connecting means (18). Porte-mine (8) selon la revendication 1, caractérisé en ce que le moyen de liaison (18) consiste en un moyen choisi dans le groupe constitué par les moyens de vissage, les moyens de clippage et les moyens de raccordement à baïonnette.A mechanical pencil (8) according to claim 1, characterized in that the connecting means (18) consists of a means selected from the group consisting of the screwing means, the clipping means and the bayonet connection means. Porte-mine selon la revendication 1 ou 2, caractérisé en ce que l'élément d'accouplement (6) présente une base (27) et une surface de contact tronconique (33).Mechanical pencil according to claim 1 or 2, characterized in that the coupling element (6) has a base (27) and a frustoconical contact surface (33). Porte-mine (8) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'élément d'accouplement (6) est solidaire de la première partie (9) du corps allongé (17) du porte-mine (8).Mechanical pencil (8) according to any one of claims 1 to 3, characterized in that the coupling element (6) is integral with the first part (9) of the elongated body (17) of the mechanical pencil ( 8). Porte-mine (8) selon la revendication 3 ou 4, caractérisé en ce que le corps allongé (17) présente une paroi latérale (31) s'étendant selon l'axe longitudinal (X) et en ce que dans le tronçon de paroi latérale (31) de la première partie (9) du corps allongé (17) est ménagé un épaulement interne (20) pour délimiter une section de passage (26) qui est inférieure à la section transversale de la base (32) de l'élément d'accouplement (6).Propelling pencil (8) according to claim 3 or 4, characterized in that the elongated body (17) has a lateral wall (31) extending along the longitudinal axis (X) and in that in the wall section lateral portion (31) of the first portion (9) of the elongate body (17) is provided with an internal shoulder (20) for delimiting a passage section (26) which is smaller than the cross section of the base (32) of the coupling member (6). Cartouche (1) de mines (4) conçue pour être insérée dans le porte-mine (8) selon quelconque des revendications 1 à 5, ladite cartouche (1) comporte au moins un logement amont (16) conçu pour accueillir des mines (4) et l'extrémité aval (2a) présentant l'ouverture de sortie (5) de la mine (4), ladite cartouche (1) comporte une paroi latérale (29) s'étendant selon l'axe longitudinal (X),
le tronçon de la paroi latérale (29) de l'extrémité aval (2a) se décompose en au moins : - un premier tronçon (29b) dont la section transversale décroît d'amont en aval, - un deuxième tronçon (29a) dont la section transversale croît d'amont en aval, caractérisée en ce que le tronçon de la paroi latérale (29) de l'extrémité aval (2a) présente des fentes (23) s'étendant sensiblement selon l'axe longitudinal (X).A cartridge (1) for mines (4) adapted to be inserted into the mechanical pencil (8) according to any one of claims 1 to 5, said cartridge (1) comprises at least one upstream housing (16) designed to accommodate mines (4). ) and the downstream end (2a) having the outlet opening (5) of the mine (4), said cartridge (1) has a side wall (29) extending along the longitudinal axis (X),
the section of the side wall (29) of the downstream end (2a) is broken down into at least: a first section (29b) whose cross section decreases from upstream to downstream, a second section (29a) whose cross section increases from upstream to downstream, characterized in that the section of the side wall (29) of the downstream end (2a) has slots (23) extending substantially along the longitudinal axis (X). Cartouche (1) de mines (4) selon la revendication 6, caractérisée en ce que le tronçon de la paroi (29) de l'extrémité aval (2a) comprend en outre un tronçon intermédiaire (29c) de section transversale constante disposé entre le premier tronçon (29b) et le deuxième tronçon (29a).Cartridge (1) of mines (4) according to claim 6, characterized in that the section of the wall (29) of the downstream end (2a) further comprises an intermediate section (29c) of constant cross section disposed between the first section (29b) and the second section (29a). Cartouche (1) de mines (4) selon l'une quelconque des revendications 6 à 7, caractérisée en ce que le tronçon (29a,29b,29c) de la paroi latérale (29) de l'extrémité aval (2a) est en un matériau semi-rigide à mémoire de forme.Cartridge (1) for mines (4) according to any one of claims 6 to 7, characterized in that the section (29a, 29b, 29c) of the side wall (29) of the downstream end (2a) is in a semi-rigid shape memory material. Instrument d'écriture (30) comprenant un porte-mine (8) selon l'une quelconque des revendications 1 à 5 et une cartouche (1) de mines (4) selon l'une quelconque des revendications 6 à 8, optionnellement remplie de mines (4).Writing instrument (30) comprising a mechanical pencil (8) according to any one of claims 1 to 5 and a cartridge (1) mines (4) according to any one of claims 6 to 8, optionally filled with mines (4).
EP14180455.9A 2013-08-13 2014-08-11 Mechanical pencil having a removable lead cartridge Not-in-force EP2837505B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1357977A FR3009699B1 (en) 2013-08-13 2013-08-13 MINE HOLDER EQUIPPED WITH REMOVABLE MINING CARTRIDGE

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EP2837505A1 true EP2837505A1 (en) 2015-02-18
EP2837505B1 EP2837505B1 (en) 2017-08-23

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CN (1) CN204236067U (en)
FR (1) FR3009699B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10525762B2 (en) 2016-12-06 2020-01-07 Sanford L.P. Writing instrument side-knock mechanism

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR925353A (en) * 1945-04-30 1947-09-02 Brac S A Reservoir pencil
FR2493769A1 (en) 1980-11-08 1982-05-14 Faber Castell A W INTERCHANGEABLE MINES TANK PORTEMINE
US5162812A (en) 1989-10-02 1992-11-10 At&T Bell Laboratories Technique for achieving the full coding gain of encoded digital signals
US5165812A (en) * 1990-10-29 1992-11-24 A. W. Faber-Castell Gmbh & Co. Lead writing instrument with selective locking of chuck
US6758617B2 (en) 2000-02-25 2004-07-06 Micro Co., Ltd. Side knocking-type writing instrument
EP0806305B1 (en) 1995-01-30 2004-09-15 Pentel Kabushiki Kaisha Side-knock mechanical pencil
FR2861330A1 (en) 2003-10-22 2005-04-29 Bic Soc Writing instrument e.g. mechanical pencil, has writing point forwarding mechanism with movable part having bearing that supports cam during tilting movement of side button
US20110229245A1 (en) 2010-03-17 2011-09-22 Wang Yuanhong Side knock type mechanical pencil

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR925353A (en) * 1945-04-30 1947-09-02 Brac S A Reservoir pencil
FR2493769A1 (en) 1980-11-08 1982-05-14 Faber Castell A W INTERCHANGEABLE MINES TANK PORTEMINE
US5162812A (en) 1989-10-02 1992-11-10 At&T Bell Laboratories Technique for achieving the full coding gain of encoded digital signals
US5165812A (en) * 1990-10-29 1992-11-24 A. W. Faber-Castell Gmbh & Co. Lead writing instrument with selective locking of chuck
EP0806305B1 (en) 1995-01-30 2004-09-15 Pentel Kabushiki Kaisha Side-knock mechanical pencil
US6758617B2 (en) 2000-02-25 2004-07-06 Micro Co., Ltd. Side knocking-type writing instrument
FR2861330A1 (en) 2003-10-22 2005-04-29 Bic Soc Writing instrument e.g. mechanical pencil, has writing point forwarding mechanism with movable part having bearing that supports cam during tilting movement of side button
US20110229245A1 (en) 2010-03-17 2011-09-22 Wang Yuanhong Side knock type mechanical pencil

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CN204236067U (en) 2015-04-01
FR3009699B1 (en) 2016-10-28
EP2837505B1 (en) 2017-08-23
FR3009699A1 (en) 2015-02-20

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