FR3076255A1 - RECHARGEABLE WRITING INSTRUMENT - Google Patents

Abstract

Rechargeable writing instrument (10) comprising a body (12) having a side window (12B1), a writing element (14) disposed within the body (12) and having a writing tip (17) and a button (13) for moving the writing element (14) between a retracted position and a writing position, the body (12) comprising at least a first portion (12A) having a hole (12-1A) ) for the passage of the writing tip (17), a second portion (12B) having the window (12B1), and a third portion (12C) carrying the writing member (14), the third portion (12C) ) being rotatably coupled about the axial direction (X) with the second portion (12B) and free to rotate about the axial direction (X) with respect to the first portion (12A).

Description

FIELD OF THE INVENTION The invention relates to a rechargeable writing instrument, and in particular, but not only, a rechargeable multifunction writing instrument. As a reminder, a multifunction writing instrument 5 is a writing instrument comprising a plurality of writing elements, each writing element being able to be used selectively.

STATE OF THE PRIOR ART [0002] The structures of known writing instruments, in particular multifunction writing instruments, do not always allow easy replacement of the writing element or elements. There is therefore a need in this sense.

PRESENTATION OF THE INVENTION One embodiment relates to a rechargeable writing instrument comprising a body extending in an axial direction and in a radial direction and having at least one side window, at least one writing element disposed inside the body and comprising a writing tip and a button, the button extending radially through the window and making it possible to move the writing element between a retracted position in which the writing tip is retracted into the body, and a writing position in which the writing point protrudes from the body, the body comprising at least a first part (or front part) having an orifice for the passage of the writing point, a second part (or rear part) having the at least one window, and a third part carrying the at least one writing element, the third part being coupled in rotation around e the axial direction with the second part (and vice versa) and free to rotate around the axial direction relative to the first part (and vice versa).

In general, the axial direction corresponds to the direction of the body axis, and a radial direction is a direction perpendicular to the axis of the body. It is understood that an azimuthal or circumferential direction corresponds to the direction describing a ring around the axial direction. Furthermore, unless otherwise specified, the adjectives “interior” / “exterior” or “internal” / “external” are used with reference to a radial direction so that an interior part (i.e.

radially inner) is closer to the body's axis than an outer part (i.e. radially outer). It is also understood that the body has a front end having the orifice for passing a writing tip, and a rear end disposed opposite, in the axial direction, from the front end. Thereafter, and unless otherwise indicated, by "front" / "rear" means "disposed on the side of the front / rear end".

Of course, the writing instrument can have a single writing element, or a plurality of writing elements and thus form a multifunction writing instrument. Thereafter, and unless otherwise indicated, by "the writing element" means "the at least one writing element".

It is understood of course that the body comprises at least three parts, namely the first part, the second part and the third part, these parts forming separate parts. Each part can itself be formed from a single piece, or from several separate pieces. Within the meaning of the present invention, the body comprises all the parts other than the writing element or elements. The body is of course hollow and configured to receive the writing element. The body thus has an interior and an exterior. The side window is a through window formed in a wall of the body, and more particularly in a wall of the second part, and opening out radially. The body is provided with at least one window per writing element. Thus, the button for each writing element is received in a separate window. In other words, there are at least as many windows as there are writing elements.

We also understand that a retraction mechanism of any type and known elsewhere allows to move, thanks to the button, the writing element between the retracted position and the writing position, and maintain the writing element in each of these positions. Of course, there are as many retraction mechanisms as there are writing elements, each mechanism being specific to a writing element. In other words, each writing element is provided with such a retraction mechanism.

The button is guided in the window for the passage of the writing element from the writing position to the retracted position and vice versa. For example, the window is of substantially rectangular shape, the long sides of the rectangular shape extending in the axial direction. In such an example, the button is guided axially by the long sides of the window. The short sides may limit the axial travel of the button, but not necessarily.

For the purposes of the present description, by “carrying” is meant “receiving at least in part the writing element, keeping it in position in the radial and circumferential direction within the body and helping to guide it within the body ". In other words, the third part receives at least part of the writing element, the holding in position in the radial and circumferential direction within the body and participates in its guidance within the body, in particular during the passage of the writing position to the retracted position and vice versa.

Thanks to the coupling structure between the first, second and third parts, it provides a certain ease for their assemblies / disassemblies, whereby one can easily access the writing element to replace it.

In some embodiments, the first part is assembled reversibly directly with the second part by fixing by screwing, bayonet or equivalent.

By "fixing by screwing, bayonet or equivalent" means of course a fixing by screwing, a fixing by bayonet, or any other fixing means requiring at least a rotational movement around the axial direction to assemble / disassemble the two parts. It is understood that the first and second parts are fixed directly together with each other. In other words, the first and second parts each have an element complementary to each other to fix them together. In other words, the third part does not intervene in the fixing of the first part with the second part.

The first part and the second part are therefore assembled by means of a fixing which requires at least one rotational movement, and this in a reversible manner. Thus, the second part can be removed from the first part. When mounting or dismounting the first part and the second part, a rotary movement is made around the axial direction of one part with respect to the other. During this relative rotational movement between the first part and the second part, the third part follows the movement of the second part. Thus the third part also rotates with respect to the first part. This makes it possible to maintain the relative circumferential position of the writing element with respect to the window while the first part and the second part are moved aside or brought together in the axial direction. In other words, the circumferential position of the window and of the writing element (carried by the third part) remains unchanged when the first part and the second part are mounted or dismounted together. .

Thanks to such a coupling structure between the first, second and third parts, it is ensured that the writing element follows the rotational movement of the second part around the axial direction during assembly / disassembly of the second part with the first part, and the button does not collide with the lateral edges of the window so as to block the rotational movement of the second part relative to the first part. It is therefore easy to assemble / disassemble the first part and the second part, whereby one can access the writing element to replace it.

In some embodiments, the third part is coupled in translation in the axial direction with the first part (and vice versa).

It is therefore understood that the third part can rotate around the axial direction relative to the first part but that it cannot be moved in the axial direction relative to the first part. Thus, when the first part and the second part are disassembled, the third part remains assembled with the first part.

Such a coupling structure between the first part and the third part allows easier access to the writing element to replace it.

In some embodiments, the third part is assembled with the first part by clipping.

For example, the clipping between the first part and the third part is irreversible (i.e. one cannot disassemble the first part and the third part without damaging them in whole or in part, at least damaging the clipping means). Furthermore, such a coupling mode makes it possible to easily couple two elements in translation in an axial direction while leaving them free to rotate about the axial direction relative to one another, for example using an annular clip structure comprising for example a rib or an annular groove.

An assembly by clipping is simple and robust, which makes the assembly of the third part more reliable with the first part, whereby a certain ease of replacement of the writing element is ensured over time, as you use the writing instrument.

In some embodiments, the second part is free in translation in the axial direction relative to the third part (and vice versa).

It is therefore understood that the third part rotates in concert with the second part during the assembly / disassembly of the first part with the second part, but that it can be moved in the axial direction relative to the second part . Thus, when the first part and the second part are disassembled, the third part is easily dissociated in the axial direction of the second part.

Such a coupling structure between the second part and the third part makes it easier to access the writing element to replace it.

In some embodiments, one element among the second part and the third part has at least one axial groove while the other element among the second part and the third part has at least one projection configured to cooperate in slide according to the axial direction with the at least one axial groove.

It is therefore understood that there may be one or more grooves and as many corresponding projections. Thereafter and unless otherwise indicated, by "the groove" and "the projection" means "the at least one groove" and "the at least one projection".

It is understood that if the second part has the groove, then the third part has the projection and conversely, if the second part has the projection, then the third part has the groove. For example, the projection may be an axial rib or a lug.

For example, the projection and the rib cooperate in a slide way by complementarity of shape.

Such a structure allows to easily couple in rotation around the axial direction the third part with the second part while leaving free in translation in the axial direction the third part relative to the second part (and vice versa). Furthermore, when assembling the second part with the first part, it is very easy to align the projection with the rib, and therefore the third part with the second part (and consequently the element of writing with the window). In addition, such a rib makes it possible to guide the movement of the second part axially with respect to the first part and to assist in the assembly / disassembly of the first part and the second part. This therefore facilitates the assembly / disassembly of the first part and the second part, and therefore facilitates the replacement of the writing element.

In some embodiments, the writing element comprises a key configured to cooperate with the third part, to ensure a predetermined positioning of the writing element relative to the third part when the second part is detached from the first part.

For example, the polarizing element is formed by a portion of the button or by a portion of the reservoir of the writing element. Of course, the polarizing device cooperates by complementarity of form with a corresponding portion of the third part. In the predetermined position, it is ensured that the writing element, and in particular the button is correctly positioned relative to the second part to engage in the window when reassembling the second part on the first part. Such a key therefore facilitates the replacement of the writing element.

In some embodiments, the third part has a portion forming an axial slide configured to cooperate with the writing element.

Such a slide can for example form the complementary portion of a keying device of the writing element, but not necessarily. Such a slide makes it possible to receive and guide the writing element in the axial direction, in particular when replacing the writing element. For example, the slide can also guide the writing element during the passage of the writing element from the retracted position to the writing position, and vice versa. Such a slide therefore facilitates the positioning of the writing element within the body, and more particularly within the third part, during the replacement of the writing element. In other words, this facilitates the replacement of the writing element.

In some embodiments, the writing element is a mechanical pencil system comprising a mechanical pencil mechanism, the second part comprising an external portion and an internal portion housed at least partially inside the external portion , the internal portion being axially movable relative to the external portion, the internal portion being configured to axially drive the mechanical pencil system in order to actuate the mechanical pencil mechanism when the mechanical pencil system is in the writing position.

Of course, if the writing instrument comprises several writing elements, at least one of these writing elements is a mechanical pencil system. According to a variant, a single writing element is a mechanical pencil system. According to another variant, several writing elements are mechanical pencil systems. According to yet another variant, all the writing elements are mechanical pencil systems.

It is understood that the mechanical pencil mechanism is a mechanism known elsewhere, for example pliers, which allows to block a mine in position and to advance it. In other words, when a writing element is a mechanical pencil system, it includes a mechanical pencil mechanism, a mine tank and a button.

It is understood that the internal portion is arranged at least partially radially inside the external portion, and conversely that the external portion is arranged at least partially radially outside the internal portion.

The internal portion is axially movable relative to the external portion and relative to the first part. For example, the return spring of the mechanical pencil system tends to bring the internal portion into abutment in the axial direction, towards the rear, against the external portion.

The writing instrument structure with replaceable writing element according to the present description is particularly well suited to a writing element such as a mechanical pencil.

In some embodiments, the inner portion and the outer portion are coupled in rotation about the axial direction.

Such rotational coupling allows to keep the circumferential position of the inner portion relative to the outer portion, which facilitates the assembly / disassembly of the first part and the second part. This therefore makes it easier to replace the writing element.

In some embodiments, the internal portion has an axial projection forming a rear button extending axially at least in part outside the external portion and configured to move the internal portion axially.

It is therefore understood that the projection of the internal portion forms a button operable by the user to actuate the mechanical mechanism via the internal portion.

BRIEF DESCRIPTION OF THE DRAWINGS The invention and its advantages will be better understood on reading the detailed description given below of different embodiments of the invention given by way of nonlimiting examples. This description refers to the pages of attached figures, on which:

FIG. 1 represents a first embodiment seen in perspective, the first part and the second part being assembled,

FIG. 2 represents the first embodiment seen in exploded view and partially in section,

FIG. 3 represents the first embodiment where the first part and the second part are disassembled,

FIG. 4 represents a second embodiment seen in perspective, the first part and the second part being assembled,

FIG. 5 represents the second embodiment seen in exploded view and partially in section and partially cut away, and

- Figure 6 shows the second embodiment where the first part and the second part are disassembled.

DETAILED DESCRIPTION OF EMBODIMENTS FIGS. 1, 2 and 3 show a first embodiment of a rechargeable writing instrument 10, in this example a multifunction writing instrument, comprising a body 12 and a plurality writing elements 14, in this example four writing elements 14. The body 12 extends in an axial direction X, in a radial direction R and in a circumferential direction C. The body 12 has a front end 12 -1 having an orifice 12-1A for the passage of the writing tips 17 and a rear end 12-2 opposite the front end 12-1 in the axial direction X.

The body 12 comprises a first part 12A, a second part 12B and a third part 12C, the first part 12A and the second part 12B each forming, in this example, a barrel. The first part 12A has the orifice 12-1A for the passage of the writing tips 17. The second part 12B has four side windows 12B1. A button 13 of a writing element 14 extends radially in each window 12B1. The third part 12C has a generally solid cylindrical shape in which are formed four through holes 12C1 extending in the axial direction X, and regularly distributed in the circumferential direction. These holes 12C1 are provided for the passage of the writing elements 14, and more particularly for the passage of the reservoirs 18 and of the writing points 17, and the holding in radial and circumferential position of each writing element 14 within the body 12. In other words, the third part 12C carries the writing elements 14. In this example, the body 12 receives four writing elements 14, each writing element is carried by the third part 12C, and the button 13 of each writing element 14 extending radially through a separate window 12B1. Of course, according to a variant, there are more or less than four windows, more or less than four through holes in the third part, and more or less than four writing elements.

In this example, the writing elements 14 all have an identical writing point, in this example a ball point 17. Of course, according to a variant, the writing elements have different writing points each other. In this example, the buttons 13 of all the writing elements 14 are identical. Of course, according to a variant, the buttons may be different from one writing element to another. The button 13 of each writing element is connected to the writing tip 17 by a reservoir 18, in this example an ink reservoir, each containing an ink of a color different from that of the other reservoirs. In this example, the reservoir 18 has a radial projection 18A having a predetermined position relative to the buttons 13, this radial projection forming a polarizer. This key 18A is received in a groove 12C12 formed in a wall of the hole 12C1 of the third part 12C, this groove 12C12 extending axially. The groove 12C12 thus forms an axial slide cooperating with the polarizer 18A. More generally in this example, independently of the key 18A and the groove 12C12, the holes 12C1 form a slide cooperating with the reservoir 18.

In Figure 1, a writing element 14 is in the writing position, its writing tip 17 projecting from the body 12, while the other writing elements 14 are in the retracted position, their tips d 'writing 17 being retracted into the body 12. In Figure 1 the first and second parts 12A and 12B are transparent so that the writing elements are visible. Of course, in reality, these parts can be transparent or opaque. In a known manner, moreover, by activating a button 13 of a writing element 14 in the retracted position, said writing element is brought into the writing position while the writing element which was already in the position of writing automatically returns to the retracted position. For this automatic return to the retracted position, the writing elements 14 are each provided with a return spring 15. In this example, each window 12B1 is of substantially rectangular shape, the long side of the rectangular shape extending in the axial direction X. The lateral edges (ie extending axially) 12B11 and 12B12 of the windows 12B1 carry internal ribs 12B13 extending axially and which cooperate with the buttons

13. The internal ribs 12B13 block radially inward of the body 12 the buttons 13 when the writing elements 14 are in the retracted position. The ribs 12B13 are shorter in the axial direction X than the windows 12B1, so that the buttons 13 can, after a certain axial stroke from the retracted position of the corresponding writing element, sink radially towards inside the body

12. Thanks to this depression, the return of the button 13 induced by the spring 15 is blocked by the axial end of the ribs 12B13 adjacent to the button 13, which cooperates axially in abutment with the button 13. Thus the elements d 'writing 14 are blocked, via the buttons 13, in the writing position. As can be seen in FIG. 2, each button 13 has three radial projections, namely a front projection 13A, a rear projection 13B and an intermediate projection 13C disposed between the front projection 13A and the rear projection 13B. When a button 13 is moved towards the front end 12-1, it engages with the ribs 12B13 so as to lock the corresponding writing element in the writing position. When another button 13 of another writing element is moved forward, the intermediate projection 13C of this button cooperates with the rear projection 13B of the button of the writing element in the writing position, thanks what the button of the latter is released from the ribs 12B13 and the corresponding writing element automatically returns to the rear, in the retracted position, thanks to the associated spring 15. The front projection 13A is mainly used for guiding the button 13. Of course, as an alternative, the writing instrument can be equipped with any other mechanism for retracting the writing elements.

The first part 12A and the second part 12B are assembled reversibly directly with one another by fixing by screwing. To this end, the first part 12A has a first thread 16A and the second part 12B has a second thread 16B complementary to the first thread 16A.

The third part 12C is assembled by clipping with the first part 12A, thanks to an annular clipping structure comprising two annular ribs 12A2 and 12C2 engaged with each other. Of course, this clipping structure comprises a shoulder 12C3 of the third part 12C which cooperates axially in abutment against a complementary shoulder of the first part 12A. Thanks to this annular clipping structure, the third part 12C is free to rotate about the axial direction X relative to the first part 12A and coupled in translation in the axial direction X with the first part 12A.

The third part 12C has axial ribs 12C4, in this example four ribs 12C4 regularly distributed in the circumferential direction C, cooperating by complementarity of shape and sliding in the axial direction X with axial grooves 12B2, in this example four axial grooves 12B2 regularly distributed in the circumferential direction C, of the second part 12B. Thus, the third part 12C is coupled in rotation around the axial direction X with the second part 12B and free in translation in the axial direction X relative to the second part 12B.

It is noted that ribs 12B3 for the axial guidance of the buttons 13 are formed inside the second part 12B in the axial extension of the side edges of the windows 12B1. These ribs 12B3 have an evolving profile in the axial direction X, and open into the grooves 12B2. Thus, each rib 12B3 forms a point opening into a groove 12B2 and widens from the front towards the rear of the writing instrument, thus forming a guide for guiding the buttons facing the windows 12B1 during of the assembly of the second part 12B with the first part 12A.

By turning the second part 12B relative to the first part 12A around the axial direction X (ie in the circumferential direction C) according to the arrow in bold DI shown in Figure 1, we can disassemble, in this example unscrew , the second part 12B of the first part 12A. During this unscrewing, thanks to the coupling by the ribs / grooves 12C4 / 12B2, the third part 12C rotates in concert with the second part 12B, whereby the buttons 13 also follow the rotational movement of the second part 12B. The buttons therefore do not block the rotational movement of the second part 12B. Furthermore, still thanks to the ribs / grooves 12C4 / 12B2, the second part 12B moves freely in the axial direction X relative to the third part 12C when it is removed from the first part 12A. Note that during this axial movement, the buttons 13 emerge from the ribs 12B13, whereby the buttons can move radially within the second part 12B. In other words, during this axial translational movement, the buttons 13 can be erased from the windows 12B and do not block the disassembly of the second part 12B from the first part 12A.

Figure 3 shows the writing instrument 10 where the second part 12B is disassembled with the first part 12A. The writing elements 14 can be removed from the third part by simply extracting them from the holes 12C1 in the axial direction X, towards the rear, as indicated by the arrow in bold in FIG. 3.

To mount a replacement writing element within the writing instrument 10, it suffices to carry out the reverse steps, namely to introduce a new writing element into the hole 12C1 in the axial direction X ( reverse direction of the arrow in bold in Figure 3) taking care to align the key 18A with the slide 12C12, align the ribs 12C4 with the grooves 12B2 and assemble, in this example screw, the second part 12B with the first part 12A (ie rotation in the opposite direction of the arrow DI in FIG. 1). The key 18A having a predetermined position relative to the button 13, it allows to ensure a predetermined positioning of the writing element 14 relative to the third part 12C when the second part 12B is detached from the first part 12A. Thus when reassembling the second part 12B on the first part 12A, it is ensured that the buttons 13 are correctly oriented relative to the windows 12B1, in particular that the radial projections 13A, 13B and 13C are oriented radially inwards. while the gripping part of the button, arranged radially opposite the radial projections 13A, 13B and 13C, is oriented radially towards the outside of the writing instrument 10. Furthermore, during this reassembly, the grooves 12B3 guide the buttons 13 so that they are perfectly aligned in the circumferential direction with the windows 12B1. Of course, in normal use, these grooves 12B3 participate in guiding the buttons during the passage of the writing element 13 from the retracted position to the writing position, and vice versa.

Figures 4, 5 and 6 show a second embodiment of a rechargeable writing instrument 100, in this example a multifunction writing instrument. The elements identical to the first embodiment 10 are not described again and have an identical reference sign, while the elements which are different but comparable to the first embodiment have their reference sign incremented by 100. It is noted that in the figure 4, all the writing elements are in the retracted position.

The writing instrument 100 according to the second embodiment differs from the writing instrument 10 according to the first embodiment in that the body is different, in that one of the writing elements is a mechanical pencil system, and in that the buttons of the writing elements are different.

The rechargeable writing instrument 100 comprises a body 112 and a plurality of writing elements 114 and 20, in this example three writing elements 114 and a writing element 20. The elements 114 differ from elements 14 of the first embodiment mainly in that the button 113 has a key 113A. In this example, the key 113A is formed by a radial projection extending outward from the writing instrument 100, when the writing element is mounted within the writing instrument 100. note that the polarizing device 113A also extends in the axial direction X. The writing element 20 is a mechanical pencil system comprising a button 113, connected to a mechanical pencil mechanism 24 by a mine reservoir 22. The external appearance buttons 113 is in this example the same on the writing elements 114 and 20, but the connection / fixing of the buttons 113 with the ink tank 18 and with the tank 22 may be different.

The body 112 includes a first part 112A, a second part 112B and a third part 112C. The second part 112B comprises an external portion 112BE and an internal portion 112BI partly housed inside the external portion 112BE. The second part 112B, and more particularly in this example the external portion 112BE, is screwed directly with the first part 112A. Note that in Figure 5 the third part 112C is shown partially broken away.

Similarly to the first embodiment, the third part 112C is clipped with the first part 112A thanks to an annular clipping structure comprising in this example an annular groove 112A2 engaged with reliefs 112C2 (only one relief being visible on Figure 5). The third part 112C is free to rotate around the axial direction X with respect to the first part 112A and coupled in translation in the axial direction X with the first part

112A.

The third part 112C has axial grooves 112C4 cooperating by complementarity of shape and in a slide in the axial direction X with axial ribs 112B2 of the second part 112B, and more particularly of the external portion 112BE of the second part 112B. The third part 112C is coupled in rotation around the axial direction X with the second part 112B and free in translation in the axial direction X relative to the second part 112B.

The internal portion 112BI comprises a central portion 112BI1, in this example a substantially square 112BI1 plate and extending transversely to the axial direction X. A projection 112BI2 extends in the axial direction X from the center of the plate 112BI1 towards the rear end 112-2 of the body 112, and forms a rear button. As can be seen in FIG. 4, this projection 112BI2 extends partially inside the external portion 112BE and, consequently, partially outside the external portion 112BE. Four fingers 112BI3 extend in the axial direction X from the corners of the square formed by the plate 112BI1 towards the front end 112-1. Each finger 112BI3 cooperates with a slide extending in the axial direction X and comprising a first portion 115A formed inside the external portion 112BE and a second portion 115B formed inside the third part 112C. Of course, the third part 112C is configured so that the portions 115A and 115B are aligned when the ribs 112B2 are introduced into the grooves 112C4. For this, in this example, the ribs 112B2 and the portions 115A have the same circumferential position and are arranged axially one after the other inside the exterior part 112BE while the grooves 112C4 and the portions 115B have the same circumferential position and are arranged on either side of a rear annular wall 112C5 of the third part 112C, the grooves 112C4 being outside the annular wall 112C5 while the slides 115B are at the inside of the annular wall 112C5. The internal portion 112BI is thus guided in translation in the axial direction X within the external portion 112BE and of the third part 112C and is coupled in rotation around the axial direction X with the external portion 112BE (and with the third part 112C depending on its axial position within the external portion 112BE). It is noted that the distal end 112BI31 of each finger 112BI3 is tapered / in the shape of a point, which allows the buttons 113 to be guided axially opposite the windows 112B1 when the second part 112B is assembled with the first part 112A.

In this example, each window 112B1 is of substantially rectangular shape, the long side of the rectangular shape extending in the axial direction X, the fingers 112BI3 being aligned with the edges 112B11 and 112B12 of the long sides of the windows 112B1 and Cooperate with the buttons 113. More particularly, the fingers 112BI3 carry the ribs 112B13 which cooperate with the buttons 113 in the same way as the ribs 12B13 of the first embodiment with the buttons 13. The internal portion 112BI being axially movable, the springs return 15 tend to bring the inner portion 112BI rearward, abutting against the outer portion 112BE. Thanks to the projection 112BI2, the internal portion 112BI can be moved axially forward. Thus, when the mechanical pencil system 20 is in the writing position, by actuating the internal portion 112BI in the axial direction X towards the front using the projection 112BI2, the mechanical pencil mechanism 24 which comes into abutment is actuated. against an internal surface of the first part 112A, whereby a mine can be advanced within the mechanical pencil system 15.

The third part 112C comprises holes passing through 112C1 each forming an axial slide for a writing element 114/20. Furthermore, inside the rear annular wall 112C5 are formed grooves forming slides 112C6, each cooperating by complementary shape with a key 113A of a button 113. It is noted that within the annular wall 112C5, the grooves 115B and the grooves 112C6 alternate in the circumferential direction C. In other words each groove 115B is clamped in the circumferential direction C by two grooves 112C6 and vice versa.

Similarly to the first embodiment, by turning the second part 112B relative to the first part 112A according to the arrow DI shown in Figure 4, we can disassemble, in this example unscrew, the second part 112B of the first part 112A. During this unscrewing, the third part 112C rotates in concert with the second part 112B, whereby the buttons 113 also follow the rotational movement of the second part 112B. Furthermore, the second part 112B moves freely in the axial direction X relative to the third part 112C when it is removed from the first part 112A. Note that during this axial displacement, the buttons 113 emerge from the ribs 112B13 of the fingers 112BI3, whereby the 10 buttons 113 can move radially within the second part 112B, and in particular within the external portion 112BE.

Figure 6 shows the writing instrument 100 where the second part 112B is disassembled with the first part 112A. The writing elements 114 and 20 can be removed from the third part 112C by simply extracting them from the holes 112C1 in the axial direction X towards the rear, as indicated by the arrow in bold in FIG. 6.

To facilitate the replacement operation and avoid any untimely movement of the internal portion 112BI during replacement, and in particular to prevent the internal portion from being released from the external portion 112BE, the internal portion 112BI has, according to a variant of clipping reliefs which cooperate by clipping with the external portion 112BE. These reliefs make it possible to maintain the internal portion 112BI in position relative to the external portion 112BE, but of course allow, when a sufficient axial pressure is applied by a user to the projection 112BI2, the axial displacement of the internal portion 112BI. These reliefs are also dimensioned to allow the internal portion 112BI to return to position by the springs 15, when the user releases the pressure exerted on the projection 112BI2. In other words, the reliefs make it possible to block the internal portion 112BI in position during the disassembly of the second part 112B from the first part 112A, but do not prevent the internal portion 112BI from sliding in normal operation.

To mount a replacement writing element within the writing instrument 100 35, it suffices to carry out the reverse steps, namely to introduce a new writing element from the rear to the front. a hole 112C1 in the axial direction X (ie opposite direction of the arrow in bold in FIG. 6) taking care to align the polarization 113A with the slide 112C6, align the ribs 112B2 with the grooves 112C4 and assemble, in this example screw, the second part 112B with the first part 112A (ie opposite direction of the arrow Dl in FIG. 4).

Although the present invention has been described with reference to specific embodiments, it is obvious that modifications and changes can be made to these examples without departing from the general scope of the invention as defined by the revendications. In particular, individual features of the various illustrated / mentioned embodiments can be combined in additional embodiments. Therefore, the description and the drawings should be considered in an illustrative rather than restrictive sense.

It is also obvious that all the characteristics described with reference to a method can be transposed, alone or in combination, to a device, and conversely, all the characteristics described with reference to a device can be transposed, alone or in combination, to a method.

Claims (11)

1. Refillable writing instrument (10, 100) comprising a body (12, 112) extending in an axial direction (X) and in a radial direction (R) and having at least one side window (12B1, 112B1) , at least one writing element (14, 114, 20) disposed inside the body (12, 112) and comprising a writing point (17, 24) and a button (13, 113), the button (13, 113) extending radially through the window (12B1, 112B1) and making it possible to move the writing element (14, 114, 20) between a retracted position in which the writing tip (17, 24) is retracted into the body (12, 112), and a writing position in which the writing tip (17, 24) projects from the body (12, 112), the body (12, 112) comprising at least at least a first part (12A, 112A) having an orifice (12-1A, 112-1A) for the passage of the writing tip (17, 24), a second part (12B, 112B) having the at least one window (12B1,112B1), and a third part (12C, 112C) carrying the at least one writing element (14, 114, 20), the third part (12C, 112C) being coupled in rotation around the axial direction (X) with the second part ( 12B, 112B) and free to rotate about the axial direction (X) relative to the first part (12A, 112A). 2. Writing instrument (10, 100) according to claim 1, in which the first part (12A, 112A) is reversibly assembled directly with the second part (12B, 112B) by fixing by screwing, bayonet or equivalent. . 3. writing instrument (10, 100) according to claim 1 or 2, wherein the third part (12C, 112C) is coupled in translation in the axial direction (X) with the first part (12A, 112A). 4. Writing instrument (10, 100) according to any one of claims 1 to 3, in which the third part (12C, 112C) is assembled with the first part (12A, 112A) by clipping. 5. Writing instrument (10, 100) according to any one of claims 1 to 4, in which the second part (12B, 112B) is free in translation in the axial direction (X) relative to the third part ( 12C, 112C). 6. Writing instrument (10, 100) according to any one of claims 1 to 5, in which one of the second part (12B, 112B) and the third part (12C, 112C) has at least one axial groove (12B2, 112C4) while the other element among the second part (12B, 112B) and the third part (12C, 112C) has at least one projection (12C4, 112B2) configured to cooperate in slide in the axial direction (X ) with the at least one axial groove (12B2,112C4). 7. Writing instrument (10, 100) according to any one of claims 1 to 6, in which the writing element (14, 114, 20) comprises a polarizing device (18A, 113A) configured to cooperate with the third part (12C, 112C), to ensure a predetermined positioning of the writing element (14, 114, 20) relative to the third part (12C, 112C) when the second part (12B, 112B) is detached from the first part (12A, 112A). 8. Writing instrument (10, 100) according to any one of claims 1 to 7, in which the third part (12C, 112C) has an axial slide portion (12C1, 12C12, 112C1, 112C6) configured to cooperate. with the writing element (14, 114, 20). 9. writing instrument (100) according to any one of claims 1 to 8, in which the writing element (20) is a mechanical pencil system comprising a mechanical pencil mechanism (24), the second part (112B ) comprising an external portion (112BE) and an internal portion (112BI) housed at least partially inside the external portion (112BE), the internal portion (112BI) being axially movable relative to the external portion (112BE) , the internal portion (112BI) being configured to axially drive the mechanical system in order to actuate the mechanical mechanism (24) when the mechanical system is in the writing position. 10. Writing instrument (100) according to claim 9, in which the internal portion (112BI) and the external portion (112BE) are coupled in rotation about the axial direction (X). 11. Writing instrument (100) according to claim 9 or 10, in which the internal portion (112BI) has an axial projection (112BI2) forming a rear button extending axially at least in part outside the external portion (112BE ) and configured to move the internal portion (112BI) axially.