DE3438074A1 - Writing implement - Google Patents

Abstract

A writing implement with a sleevelike casing and an automatic locking device for the nib in accordance with Patent Application No.: 3341759.8, is improved in that the nib (26) is sealed off from the inside of the casing by a sealing torus (23') which is located on the writing element nib section (4) instead of by individual sealing beads situated on the segments, the sealing torus (23') being shaped so as to complement the closed bend segments (34) so that complete sealing off from the inside of the casing is achieved during the locked condition and, together with the bend segments (34) which seal off the nib (26) from the outside, a completely hermetically sealed chamber (6) is formed around the nib (26), the said chamber also being able to accommodate the air feed slots (39). <IMAGE>

Description

Writing implement

3e writing The invention relates to a writing implement with a sleeve-shaped Housing and a writing element arranged in this housing, which between one exposing the writing tip portion of the writing element Ready to write position and a storage position retracted into the housing is displaceable, the adjacent to the tip portion of the writing element Housing section consists of segments that are in the ready-to-write position are spread apart radially and rest against one another in the storage position and form a closure member for the tip, the housing from an outer Sleeve and one disposed substantially within the outer sleeve, relative to this limited axially displaceable inner sleeve and the the closure part of the housing forming segments mounted on the inner sleeve are 'radially outwards' under preload and partially outside the outer Sleeve lie where it has a larger outer diameter than the inside diameter of the tip-side Have the end of the outer sleeve, and wherein the inner sleeve is attached to the outer sleeve supporting spring towards the Retention is preloaded and by means of an actuating element against the pressure of the spring is axially displaceable, according to patent ... (patent application 33 41 759.8).

The writing instrument according to P 33 41 759 are hermetically sealed to form a tight chamber around the writing element tip on the insides of the segments sealing bead segments arranged, which come to rest on the tip of the mine.

The present invention is based on the object of such To improve writing instrument and to facilitate its manufacture.

This object is achieved in that on the pointed section 4 of the writing element 2 at a point which, in the storage position, corresponds to the segments opposite, a sealing ring 23 'or cover 71 is arranged on which the segment inner surfaces come to rest and so with the sealing ring one of the tip portion of the writing element 2 surrounding, hermetically sealed chamber 6 form.

The design of the lead tip with a sealing ring or a Sealing cover has the advantage that the segment insides without sealing bead elements can be designed, which makes their production much easier. aside from that is ensured by this inventive embodiment that with each Change of mine at the same time a fresh seal for the tip portion of the writing element surrounding chamber is included. In addition, the sealing ring has the advantage that it can serve as a safeguard against advancement of the writing element in the storage position.

A particularly simple embodiment of the invention Writing implement provides that the inner surface areas of the segments are complementary are designed to the shape of the tip portion of the writing element and in the Storage position sealing on the lead tip itself can come to rest. As a result, the provision of any sealing beads has become superfluous, which the Manufacture of the writing instrument further simplified. To improve the sealing effect between the segments and the tip of the lead, the inner surface of the segments can be rubber-elastic be formed, or be provided with a rubber-elastic coating. In the same The surface of the nine tip can also be designed to be rubber-elastic in the contact area be.

A particularly favorable embodiment of the fountain pen writing element according to the invention is characterized in that the inner sleeve 74 is formed as a part-shell and that the segment tip 8 'is made in one piece as a part-shell Closure part is formed, which via an elastically outwardly biased transition part is connected to the inner sleeve.

The partial shell design of the closure part has the advantage that they are best adapted to the contours of a fountain pen tip can. In addition, the one-piece design of the closure part is considerably simpler in production.

The inner sleeve can advantageously be made in one piece with the segment tip be formed, whereby only one manufacturing step is necessary.

To ensure a good seal of the tip-side chamber a sealing bead element can be arranged in the closure part, which in the storage position comes to bear sealingly on the tip portion of the writing element. This too Sealing bead element can in turn be formed in one piece with the closure part.

In the case of a closure part consisting of several segments in one Writing implement of the type mentioned above can advantageously use the edges of each Segments connected to one another by thin-walled, elastic segment connections which are folded inwards in the storage position. This has the advantage Firstly, no more seals have to be applied to the segment edges and, secondly, that an absolute tightness to the side is guaranteed.

A writing instrument of the type mentioned at the outset can still use this be improved that the inner sleeve consists of two interconnected cylinders of different diameters, with one spring outside the thinner one and the other spring is located within the thicker cylinder.

This embodiment has the considerable advantage that the radial Dimensions of the writing instrument, especially the outer casing of the writing instrument, are smaller can be chosen, which makes the entire writing instrument slimmer and therefore visually becomes more appealing.

To simplify the change of refills in a writing instrument, see the above mentioned type, it is advantageous if the outer sleeve 1 is open to the rear and the inner sleeve 7 in the storage position to the rear of the outer sleeve 1 protrudes. Because the inner sleeve protrudes backwards from the outer sleeve, can be the rear part of the inner sleeve, which has a screw thread with the front Part connected can be unscrewed for a refill change without removing the outer Sleeve would have to be screwed on beforehand. As a result, the change of nine nines is considerable simplified.

The locking effect of the segments of the writing instrument according to the invention can be improved in that the outer surface of the closure part is divided into two Steps of different inclination to the longitudinal axis tapered backwards, the Part of the weaker slope faces the tip part.

The inventive two-stage inclination design is a two-stage closing process guaranteed. When closing the writing instrument the free edge of the tip end of the outer sleeve comes into contact first with the strongly inclined outer surface area of the closure part. ' Badurch is guaranteed that the writing element is first moved completely into the inner sleeve before the radial locking movement then very quickly when the steep incline is reached begins. On the other hand, the weaker inclination of the outer surface of the closure part in the second closing stage, a greater closing pressure of the segments against one another achieved. This increases the sealing effect of the segment elements according to the invention further improved.

If the writing instrument according to the invention, especially the inventive If the locking mechanism is to be used for capillary writers, it is advantageous designed so that on the inside of the segment tip a sealing surface for the Tip and the coil output is arranged, and that the actuating element on the inner sleeve acts and after a limited axial displacement the inner one Sleeve comes into contact with the writing element and acts on this and it axially shifts. On the one hand, by providing the sealing surface for the tip and the coil output ensures that in the storage position of the writing instrument no ink or the like can escape from the capillary and the spiral exit. on the other hand is due to the design according to the invention of the actuating element ensures that even with an ink pen, for example, a simple one Operation by a pressure mechanism is achieved. Because the actuating element, before it comes into contact with the writing element, acts on the inner sleeve, it is ensured that the capillary tip and the coil exit from the sealing surface comes free before the radial opening movement of the segment tip on which the sealing surface is attached. This effectively prevents the tip of the cap from being displaced. This inventive design of the writing instrument is the first time an ink or Eapilar Pens created in which without any cap to be lost could, an absolute tightness of the writer is guaranteed.

Further exemplary embodiments are described below with reference to the accompanying drawings of the writing instrument from P 33 41 759.8-27 described in more detail.

1-ic show longitudinal sections through an embodiment of the writing instrument in various rest, switching, etc. phases, Fig. 2 is a longitudinal section through a Another embodiment of the writing instrument, Fig. 3 is a partial longitudinal section a further embodiment of the writing device, FIG. 4 is a longitudinal section through the closure part of a further embodiment of the writing instrument, Fig. 5 a Front view of the closed tip part of a further embodiment of the Writing implement, Fig. 5a is a front view of the tip part of Fig. 5 in the open State, FIG. 6 shows a longitudinal section through a further embodiment of the writing instrument.

The embodiment of the writing instrument shown in Fig. 1-1c has a preferably one-piece, sleeve-shaped housing 1 and one therein arranged preferably two-part intermediate sleeve 7 'and 7 ", the front part 7 at its end facing the writing tip with a hermetically sealable one Closure part 8 and at its rear end via a screw, etc. connection 70 with the rear intermediate sleeve part 7 ″, which has a larger diameter than 7 ', is connected.

In other embodiments, the closure part 8 can also be in one piece be connected to the front intermediate sleeve part 7 ', the resulting Total part z.Li.

consist of two half-shells that are welded together can. Furthermore, it is also possible, the front intermediate sleeve part 7 with the larger and to equip the rear 7 'with the smaller diameter and bung the springs 10 to be placed differently accordingly. In the rear intermediate sleeve part 7t, which protrudes from the rear of the sleeve-shaped housing 1 and which thus from the outside is accessible, there is also any switching mechanism 3, which with an outwardly reaching actuating element 11 is in connection.

Furthermore, there is a writing element 2 in the writing instrument, which is during the closure state (Fig. 1) essentially within the intermediate sleeve 71 and 7tut, as well as the closure part 8 and its writing tip 26 sealed in a gas-tight manner within the hermetic chamber 6 in the closure part 8 can be.

Furthermore, on the rear end of this writing element 2 with the Switching mechanism 3 or with the actuating element 11 are acted upon.

The illustrated embodiment (Fig. 1-1c) is similar in his Functions essentially an embodiment from the earlier application P 33 41 759.8-27, which is shown there in Fig. 7-7c, it does, however, with regard to the production costs and the practical application an essential and fundamental Improvement of that earlier embodiment of the writing instrument.

The advantages of the embodiment shown here in Fig. 1-1c of the writing instrument consist first of all in the much simplified and cheaper Sealing to the inside of the housing. This is also, as in P 33 41 759.8-27, (e.g. Fig. 7-7c) through the interaction of the Aufbiegescgcnte 34 with the corresponding matched tip portion 4 of the writing element 2 reached, but omitted here the sometimes complicated and costly installation the individual Sealing bead segments 23 on the bending segments 34.

Rather, in this exemplary embodiment, the individual sealing bead segments 23 joined together to form a sealing bead ring 23 'and exactly at the location of the writing element tip section 4 attached where they in the embodiment (Fig. 7-7c) of the earlier application, during the closure state (Fig. 7) guided by the Aufbiegesegmente 34 on place on the tip section 4 of the writing element 2.

This preferably elastic sealing bead ring 23 'is shaped in such a way that that it has the peripheral space remaining when the closure part 8 is closed between bending segments 34 and writing element tip section 4 completely sealing fills out, as was previously done by the sealing bead segments 23. Here, together with the tip-side ends of the bending segments 34, a smallest possible completely hermetic chamber 6 excluding capillary forces Distance generated around the writing tip 26, in which the preferably next to the writing tip 26, air supply slots 39 of the (not shown) writing fluid system of the writing element 2 be housed can.

Furthermore, such a sealing bead ring 23 'can already be used as a Additional protection against the premature registration known from the previous application Serve advance of the writing element 2, since this only after the complete bending up the-Aufbiegesegmente 34 can emerge from the closure part 8, so what an injury to the writing tip 26, e.g. in the event of a possible failure of the thrust transfer from the compression spring 10 to the compression spring 9 is reliably avoided.

Instead of an elastic sealing ring 23 'and only flexible, radially outwardly prestressed bending segments 34, can too conversely, the bending segments 34 on the inside be made tightly elastic, i.e. they are there e.g. provided with a sealing material coating 22 and can therefor the sealing bead ring 23t can be made inelastic.

With increased sealing requirements, both sealing bead rings can be used 23 'and inside of the bending segments 34, be designed to be tightly elastic or in the opposite case, both are not tightly elastic and just well matched to one another.

Such an elastic or inelastic sealing bead ring 231 Attaching to the writing element tip cut-out 4 generally requires significantly less Effort, as is necessary, to the individual sealing bead segments 23 on the Aufbiegesegmenten 34 to be deposited. Likewise, a sealing bead ring 23 'offers sealing bead segments 23 the possibility of reducing the sealing surface, provided the number of bending segments 34 is larger than for seven or more segments.

Since densely elastic materials usually have the property with to become brittle over time and to lose its elasticity, it is with the present one Embodiment according to Fig. L-Lc also has the advantage that the sealing bead ring 23t is renewed with every change of the writing element 2, whereby it in each case is again equipped with its optimal sealing properties, which in the embodiment the earlier application P 33 41 759.8-27 only through the complete change of the closure part 8 can be achieved with the sealing bead segments 23 located therein.

Another major advantage of the present embodiment lies in the fact that the intermediate sleeve 7 'and 7' here to a certain extent with a "kink", i.e. a change in diameter is formed, thereby accommodating the two necessary for switching, pushing, etc. coordination Compression springs 9 and 10 is done in a space saving manner that allows either the Writing element 2 is much more voluminous, as shown here (Fig. 1-1c) or else the writing instrument as a whole is essentially thinner by a spring wire thickness x 2 and therefore easier to manufacture. This also eliminates the additional radial projections 36 and 38 from the earlier application, which are here (Fig. 1-1c) through the front end 82 of the intermediate sleeve part 7 ″ or through the rear End 83 of the intermediate sleeve part 7 'result.

A fourth advantage of the present embodiment to be mentioned lies in the, likewise simplified, change of language compared to the earlier example of use (Fig.

7-7c, 14, 2). Due to the design of the sleeve-shaped housing 1 and connected to it by the rear protrusion a part of the rear intermediate sleeve 7 'H it is possible to do this directly without previous, partial removal of the housing 1 or certain parts of the switching mechanism 3 to unscrew. In this case, the spring 10 slides under the pretensioning pressure the writing element 2 slightly to the rear and thereby from possible anchors within of the closure part 8 and can now with the rear intermediate sleeve part 7 " can be pulled out and changed at the same time.

In case the preload pressure of the Neither 10 is for pushing out of the writing element 2 from possible anchors within the closure part 8 should be sufficient, it is also possible after loosening the e.g. as a screw cap executed intermediate sleeve connection 70 again in the direction of the writing tip to press on the rear intermediate sleeve part 7 ″, whereby the closure part 8 open briefly and the writing element 2 by a piece in the length of the (screw) connection 70 after riveting would quickly.

In FIG. 2, a further, particularly advantageously designed one is now shown Embodiment of the writing instrument shown, which with regard to its sealing and switching functions essentially also the embodiment from Fig. 7-7c of the earlier application P 33 41 759.8-27.

The specifically designed writing element 2 makes it possible here , the closure part 8 in a much simpler and cheaper way to produce, as well as the overall diameter of the writing instrument by another to reduce.

Here, in the present embodiment, the tip portion became 4 of the writing element 2 is extended in a manner that enables during the entire switching mechanism triggered by simply pressing down the actuating element 11 or advance process of the writing element 2, the thickened main part of the writing element 2 can no longer get to the closure part 8. This results in with regard to the size requirements of the closure part 8 completely different conditions, since its minimum inner diameter is no longer greater than the maximum outer diameter of the writing element 2, but only larger than the outer diameter of the thinner one Writing element tip section 4 must be. It is now possible to use the closure part 8 considerable, up to about a quarter of the original fi, aces, smaller to manufacture, which makes a number of improvements possible.

Such a small closure part 8 initially requires his Manufacturing requires less effort, as it takes up less material on the one hand and on the other hand it can be equipped with fewer bending segments 34 in number, because with the decrease in the diameter of a longitudinally (e.g. in quarters) divided Tube the bending elasticity of whose tube segments usually increases.

Furthermore, there are the technical advantages that such small closure parts 8, which are also composed of fewer bending segments 34 are, firstly, have significantly less surface to be sealed and thus lighter are to be sealed, and secondly to generate an equally strong closing pressure per square meter as with a large locking part, less axial push or pull pressure arbitrary by the spring 9 or by a similarly acting resilient element Need kind.

As a result, both the spring 9 (or the resilient element 9) provided for generating the closing pressure can be smaller, as well as the further, relatively stronger spring 10, which is shown in P 33 41 759.8-27, for example Fig. 7-7c Apart from their function for the switching mechanism 3, the other spring 9 must also control or set into a limited movement, the pressure gradient between these springs 9 and 10 remaining, but moving at a lower level.

The I <lesser possible in this exemplary embodiment (FIG. 2) Springs 9 and 10 thus require less space and the spring 9 can do this in a peripheral space, which around the smaller closure part 8 around remains to be accommodated. The stronger, further spring 10 in turn can in another, peripheral space, which is in the intermediate sleeve 7 extending inward, elongated tip portion 4 of the writing element 2 around arises, find space.

By the fact that the compression springs 9 and 10 in the present Writing instrument with its space-saving, tip-side accommodation from the actual If the writing element 2 disappears, the writing instrument can still be used by a spring wire thickness x 2 thinner than in the already reduced diameter Embodiment according to Fig. 1-1c is the case.

Another advantage of this exemplary embodiment according to FIG. 2 is in further improving and simplifying the sealing of the writing tip 28, as well as any air supply slots 39, to the rear towards the interior of the intermediate sleeve 7 out. Since the bending segments 34 of that reduced closing part 8 behind the Writing tip 2E already very close to the tip section 4 of the writing element 2 rest around, it is only necessary for the rear sealing, the very small peripheral space between writing element tip section 4 and Aufbiegescgmenten 34 to seal, which in this case, unlike in Fig. 1, is already through a elastic, very thin and annular 3 light material coating 71 around the tip portion 4 of the writing element 2 around, can be generated.

In another, not shown embodiment of the writing instrument it is also possible to place the bent-up segments 34 in the area of the sealing material cover ring 71 during the closed state not only very close, but seamless to the To bring writing element tip section 4 (and against one another) to abut, whereby Finally, the rear sealing of the writing tip 26 by the special for this purpose formed bending segments 34 themselves, without additional additional seals to be attached can be met.

One last improvement to be mentioned of the present exemplary embodiment consists in the fact that the succession of the individual switching etc. movements, like them in P 33 41 759.8-27, especially in Fig. 22 a-i; here of two securing Factors is supported, on the one hand a premature advance of the writing element 2 or its tip section 4 through the sealing material cover ring attached to it 71, which, when the closure part 8 is closed, the writing element 2 cannot be displaced holds, is avoided.

On the other hand, during the push-button movement that the hermetic Closing of the writing instrument causes (see also in the earlier application Fig. 22 e-i) a closing of the closure part 8 before the writing element 2 is completely is retracted in intermediate sleeve 7 and closure part 8, except by the still acting pressure transfer of the spring 10 to the spring 9, through an additional bevel 72, which are located in the area of the opening 44 with the housing during opening / closing coming into contact outside of the closure part 8 is also prevented.

This additional bevel 72 causes the closure part 8 to be closing in at a large angle first (closer to 900 from the axis from geschen) rests on the housing opening 44, which initially the 3chludvorgang difficult.

By further releasing the push of the button, the next the writing element 2 with the tip section 4 and the writing tip 26 completely into the writing instrument, after which by the associated increasing Pressure of the spring 9 the closure part 8 past the additional bevel 72 with his normal bevel, which has a smaller angle (closer to Do to the axis), comes to rest on the housing opening 44.

The small-angled normal bevel causes the accelerated closing of the bending segments 34 at the housing opening 44 through the increased deflection of the pressure of the spring 9 into a radially inwardly directed closing pressure, until the closure part 8 also pulls completely into the writing instrument and finally on the shoulder 30 of the Housing 1 comes to rest, the writing tip 26 now rests in a gastight seal in the hermetic chamber 6 within the closure part 8. The very small closure part 8 thus also enables a construction that allows the closure 8 to be completely drawn into the writing instrument, as is the case with P 33 41 759.8-27 according to FIGS. 23 / 23a realized in a very small space, the former housing extension 29 being formed in one piece with the housing 1 here in FIG.

The refill change takes place in principle as in the case of that shown in FIG. 1 Embodiment, in which case instead of the rear intermediate sleeve part 7 ″ accordingly the rear spacer seal 60 is removed.

In a further embodiment of the writing instrument (Fig. 3), which also works according to the switching principle from P 33 41 759.8-27, Fig. 22, the closure is also simplified, but heavily modified Kind reached.

The writing instrument consists of a sleeve-shaped housing 1 which is beveled towards the writing tip 26. There is also a half-shell Closure part 8 ', which preferably with only 1-3 Aufbiegesegmenten 34, the under the pretensioning away from the tip section 4t of the writing element 2 stand, is equipped and which is preferably one piece at its rear end with a part-shell (e.g. half-shell) intermediate sleeve part 74 or a functionally equivalent one Shift linkage or the like is connected. The Aufbiegesegmente 34 are in turn integrally equipped with projections 73 sealing to the rear, which may be with provided with a sealing material coating 22, the function of a sealing bead segment 23 according to P 33 41 759.8-27.

In the writing instrument there is also a non-rotationally symmetrical one Writing element 2, the tip portion 4 of which is laterally offset so that it is problem-free from the obliquely closed tip area of the housing 1 after lateral spreading away of the bending segments 34 in the ready-to-write position can advance.

The hermetic sealing of the writing tip 26 is achieved here, by first opening the tip-side 9and area of the bending segments 34 of the, for example, half-shell Closure part 8 'strikes a sealing portion 75 of the housing 1 and thus causes the outside locking.

The rear sealing is achieved here by on the one hand the Sealing projections 73 on the bending segments 34 on a sealing section 76, which is on the writing element tip portion 4 ', impinge during the other, remaining part of the rear seal by one, in the sleeve-shaped Housing 1 attached, semicircular projection 77 is achieved.

Such a writing instrument, in which the bending segments 34, or part-shell Closure part 8 ', rear sealing projection 73 on the bending segments 34, as well as an only part-shell intermediate sleeve 74 consist of a single part. can be produced in an even more cost-effective manner, like the exemplary embodiments according to Fig. 1 or 2 of the present application.

Furthermore, the present embodiment (Fig. 3) is the writing instrument from its tip-side configuration, it is particularly advantageous for the closure a (not shown) filler element can be used, as a half-shell, for example Opening of the breech tip, very much the usual shape of a fountain pen tip comes in the opposite direction and thus advantageously minimizes the closure part 8 'for this purpose.

A final simplification arises here with the replacement of the previous one Compression springs 3 and 10 by any, functionally identical, resilient elements 79 and 80, which is the same as in P 33 41 759.8-27, Fig. 22, control the shift and thrust coordination.

In the closure part 8 shown in Fig. 4 of a further embodiment of the writing instrument is the attachment of any sealing bead segments 23 by a Simplified two-part construction that can be fastened to one another.

while the closure part 8 is only made up to the contact surface 78 the otherwise difficult to access tip parts 34 'of the bending segments 34 individually manufactured and relatively light with sealing bead segments 23 and the like. provided, and then attached to the corresponding segment stumps. A further simplification is possible here in that the sealing bead segments 23 are similar like the sealing projections 73 from FIG. 3, formed in one piece with the bent-up segments 34 and, if necessary, with a sealing material coating to maintain their complete sealing function 22 are provided.

In the closure part 84 shown in Fig. 5 / 5a of a further embodiment of the writing instrument is the side seal between the bending segments 34 no longer, as in the earlier application P 33 41 759.8-27 (Fig.

16, 25, 26 etc.) by applying sealing material 22 or by precisely fitting manufacturing of the bending segments 34 (see FIG. 17 there) is achieved, but through very thin-walled segment connections located between the bending segments 81 which in the closed state (Fig. 5) either contract elastically or fold inwards and are then invisible from the outside.

During the writing state (Fig. 5a) stretch or fold the Segment connections 81, similar to an umbrella, so far, as it is the tip-side opening of the aubie segments 34 of the closure part 84 to Requires free passage of the writing element 2 (Fig. 5a).

Such a closure part 84 can be made with relatively little effort produce by this z.S. when open and one-piece with the segment connections 81 together, made of a suitable plastic in the injection molding process will be produced.

Another embodiment of the writing instrument, which is shown in Fig. 6 is shown, is in a special way for the closure of capillary resp. Tube pens equipped.

The thrust and shift coordination is not here, as with the previous ones Embodiments according to the earlier application P 33 41 759.8-27, Fig. 22 and 7-7c worked, achieved, but according to Fig. 3-6 of the same application and is slightly modified for the exemplary embodiment described below (FIG. 6).

The present embodiment consists of an i.d.

R. two-part, sleeve-shaped housing 1 'and 31, and one therein arranged rotationally asymmetrical capillary writing element 88 with ink cartridge 90, writing tube 86 and spiral exit 89, which is attached to the side with a Switching mechanism 3t (e.g. a curve circuit with switching ball) is.

In addition, the writing instrument contains a partial shell (e.g. three-shell) intermediate sleeve 92, at the writing-side end a partially shell Closure part 8 ', which preferably consists of a single bending segment 95, is arranged and at the rear end of which there is an actuating projection 91, which via an actuating element 94 which extends from the rear part of the housing 31 reaches outwards, can be served.

The closure of the apillary 3 writing element 88 takes place via the Bending segment 95 of the partial-shell closure part 8 'in two ways.

On the one hand there is on the inner face of the bending segment 95 a rubber-elastic sealing element 85, which for the closure of the writing tube 86 is provided. On the other hand, the bending segment 95 has a (possibly partly gunmi-elastic) sealing projection 87, which was in the lock state comes to lie precisely above the exit of the ink pen 89.

as far as the tip-side end of the bending segment 9S is approximately at Actuation pressure on the intermediate sleeve 92 still outside the front housing part 1 'is located, the axial pressure acting on the bending segment 95 of the resilient Element 80 is still deflected radially inward via the half-sided housing opening 44.

However, once the tip portion of the bending segment 95 is completely pulled into the front housing part 1 'via the half-sided housing opening 44t has (e.g. by decreasing flow actuation pressure) and there on the axis-parallel Sliding surface 96 comes to rest, is the radial pressure deflection of the axial spring pressure ended and the bending segment 95 is now exactly axially in the direction of the capillary writing element 88 moves. As a result, the sealing element 8 is radially against the opening on the tip side of the writing tube 85, as well as the sealing projection 87 against the coil outlet 89 pressed, the bending segment 95 being additionally supported by the fixing shoulder 93 here to be led.

To achieve the writing status, a simple press is carried out, either of the actuating element 94 or with the rear housing part unscrewed 31 (screwed approximately in a compass) of the actuating projection 91 of the part-shell Intermediate sleeve 92.

Here, the closure part 95 is initially pushed a little axially in the write-side direction. In the process, the sealing element 85 detaches itself from the writing tube 86 without bending it, since the axially parallel sliding surface 96 is a lateral Move of the Aufbiegesegmentes 95 initially prevented while the capillary writing element 88 is not moved because this is caused by the pressure of the resilient element 79 (or the Compression spring 9), which expands by a corresponding amount, is prevented. Likewise, the sealing projection 87 of the Aufbiegesegmntes 95 is released from the meanwhile Spiral exit 89.

Due to the axial feed movement, the intermediate sleeve shoulder 98 after a short piece, which is exactly enough to fill one of the writing tubes 86 and the coil outlet 89 to enable the limiting projection 97 of the capillary writing element 88 reached, whereby this is now drawn.

From this point in time, the connecting part 8 'moves together with the capillary writing element 88 in the axial, writing-side direction, wherein the tip part of the bending segment 9 past the half-sided housing opening 44 ' pushes out of the front housing part 1 'and thereby radially through its outwardly directed preload from the axial area into a laterally offset one Position moved.

This feed movement continues until the switching mechanism on the side 31 of the capillary writing element switches over.

After this switchover, the feed is terminated by pressing the button again and the pressure decreases With the decreasing actuation pressure, the capillary writing element now engages 88 by means of its switching mechanism 3 'in the advanced writing position outside a.

The next step will be the strong one due to the pressure acting again resilient element 80, the part-shell intermediate sleeve 92 with the attached thereto partially shell closure part 8 'or the meanwhile in its tip part laterally bent-away bending segment 95 pulled back towards the interior of the housing.

Meanwhile, on the one hand, the weaker resilient element 79, which with its rear end against the externally latched capillary writing element 88 is supported, the intermediate sleeve shoulder 98 of the stronger resilient bar element 80 compressed.

On the other hand, the laterally bent segment 95 and its Tip portion on writing tube 86 and the tip of the externally locked capillary writing element 88 pulled sideways past in the rearward direction, with the entire nib of the capillary writing element 88 is completely exposed.

With the pressure that finally sets in, radially inward, which takes place through the half-sided housing opening onto the bending segment 95, this is finally stored laterally withdrawn against the sapillar writing element 88, the pressure of the resilient element 80 between the half-sided housing opening 44 'and the tip of the Aufbiegesegmentes 95, which laterally on the capillary writing element 88 press, is supported, which also contributes to its stable fixation. when the pressure is applied, which closes the writing instrument the 3ewegungs-, pushing and switching processes described in reverse order.

LIST OF REFERENCE NUMERALS 1) sleeve-shaped housing 1 ') front housing part 2) writing element 2 ') rotationally asymmetrical writing element 3) any switching mechanism (Scherlla) 3 ') lateral switching mechanism (scheme) 4) tip section of the writing element 6) hermetic chamber 7) intermediate sleeve 7 ') front intermediate sleeve part 7' ') rear Intermediate sleeve part 8) Closure part 8 ') partially shell closure part 9) (pressure) Spring 10) further (compression) spring 11) actuating element 23) sealing bead segments 23 ') Sealing bead ring 26) Writing tip 29) Housing extension 30) Clamping shoulder of the housing 31) rear housing part 34) bending segments 34 ') tip parts of the bending segments 37) Housing shoulder 39) Air supply slots 44) Housing opening 44 ') half-sided housing opening 60) rear spacer lock 70) spacer connection 71) sealant cover ring 72) Additional bevel on the locking part 735 Sealing projection of the bending segments 74) part-shell intermediate sleeve part 75) sealing section on the housing 76) Abciic {tab section on writing element 77) sealing projection of the housing Continuation: LIST OF REFERENCE NUMERALS 78) contact surface of the closure part 79) resilient element (weak) 80) another resilient element (strong) 81) segment connection 82) front end (Stop surface) 83) rear end (stop surface) 84) locking part 85) Sealing element 86) Writing tube 87) Sealing projection of the bending segment 88) Capillary Writing element 89) spiral exit 90) rotationally asymmetrical ink cartridge 91) actuating projection 92) Partial intermediate sleeve 93) Fixing shoulder for the bending segment 95) 94) Actuating element 95) Bending segment 96) Sliding surface 97) Limiting projection 98) Intermediate sleeve shoulder

Claims (12)

Writing implement Patent claims 1. Writing implement with a sleeve-shaped Housing and a writing element arranged in this housing, which between one exposing the writing tip portion of the writing element Ready to write position and a storage position retracted into the housing is displaceable, the adjacent to the tip portion of the writing element Housing section consists of segments that are in the ready-to-write position are spread apart radially and rest against one another in the storage position and form a closure member for the tip, the housing from an outer Sleeve and one disposed substantially within the outer sleeve, relative to this limited axially displaceable inner sleeve and the the closure part of the housing forming segments mounted on the inner sleeve are, are biased radially outwards and partially outside the outer Sleeve lie where it has a larger outer diameter than the inside diameter of the tip-side Have the end of the outer sleeve, and wherein the inner sleeve is attached to the outer sleeve supporting spring is biased towards the storage position is and by means of an actuator against the pressure of the spring is axially displaceable, according to patent ... (patent application 33 41 759.8), thereby g e k e n n n n e i n e t that on the pointed portion (4) of the writing element (2) at a point that is opposite the segments in the storage position, a sealing ring (23 ') or cover (71) is arranged on which the segment inner surfaces come to rest and so with the sealing ring one of the tip portion of the writing element (2) form surrounding, hermetically sealed chamber (6). 2. Writing implement according to claim 1, characterized in that g e k e n n -z e i c h n e t, that the in the storage position of the lead tip opposite the inner surface area the segments (34) come to rest in a sealing manner on the tip of the nine itself. 3. Writing implement according to claim 1 or 2, characterized in that g e -k e n n z e i c h n e t that the in storage position on the sealing ring or the tip section (4) of the writing element (2) sealingly coming into contact with the inner surface area of the Segments (34) is rubber-elastic. 4. Writing implement with a sleeve-shaped housing and one in this Housing arranged writing element, which between one of the serving for writing Tip abachnit of the writing element releasing readiness for writing and a storage position retracted into the housing is, the housing portion adjacent to the tip portion of the writing element consists of segments that are radially spread apart in the ready-to-write position are and rest against each other in the storage position and a closure part form for the tip, the housing consisting of an outer sleeve and a substantially arranged within the outer sleeve, limited relative to this in the axial direction there is displaceable inner sleeve and which form the closure part of the housing Segments are mounted on the inner sleeve, radially outward under bias stand and partially lie outside the outer sleeve, where they have a larger outer diameter than the inside width of the tip end of the outer sleeve, and where the inner sleeve via a spring supported on the outer sleeve in the direction is biased to the storage position and by means of an actuating element is axially displaceable against the pressure of the spring, according to patent ... (patent application 33 41 759.8), characterized in that the inner sleeve (74) is partially shelled is formed and that the segment tip (8 ') in one piece as a partial-shell closure part is formed, which via an elastically outwardly biased transition part with the inner sleeve is connected. 5. Writing implement according to claim 4, characterized in that g e k e n n -z e i c h n e t that the inner sleeve is formed in one piece with the segment tip (8 '). 6. Writing implement according to claim 4, characterized in that g e k e n n -z e i c h n e t that a sealing bead element (73) is arranged in the partial closure part (8s) is, which in the storage position sealingly on the tip portion (4) of the writing element comes to the plant. 7. Writing implement according to claim 6, characterized in that g e k e n n -z e i c h n e t that the sealing bead element (73) is formed in one piece with the closure part (8 ') is. 8. Writing implement with a sleeve-shaped housing and one in this Housing arranged writing element, which between one of the serving for writing The tip portion of the writing element releasing the ready-to-write position and a storage position retracted into the housing can be displaced, wherein the housing section which is adjacent to the tip section of the writing element and consists of segments exists, which are radially spread apart in the ready-to-write position and in the storage position abut against each other and a closure part for the Form tip, the housing of an outer sleeve and a substantially arranged within the outer sleeve, limited relative to this in the axial direction there is displaceable inner sleeve and which form the closure part of the housing Segments are mounted on the inner sleeve, radially outward under bias stand and partially lie outside the outer sleeve, where they one bigger Outside diameter as the inside width of the tip-side end of the outer sleeve have, and wherein the inner sleeve is supported by a on the outer sleeve Spring is biased towards the storage position and by means of a Actuating element is axially displaceable against the pressure of the spring, according to patent ... (patent application 33 41 759.8), in that the Segment edges with one another by thin-walled, elastic segment connections (81) are connected, which are folded inward in the storage position. 9. Writing implement with a sleeve-shaped housing and one in this Housing arranged writing element, which between one of the serving for writing The tip portion of the writing element releasing the ready-to-write position and a storage position retracted into the housing is displaceable, wherein the housing section adjacent to the tip section of the writing element made up of segments exists, which are radially spread apart in the ready-to-write position and in the storage position abut against each other and a closure part for the Form tip, the housing of an outer sleeve and a substantially arranged within the outer sleeve, limited relative to this in the axial direction there is displaceable inner sleeve and which form the closure part of the housing Segments are mounted on the inner sleeve, radially outward under Vorpamlung stand and partially outside of the outer sleeve, where they are a larger outer diameter than the inside width of the tip end of the outer sleeve, and wherein the inner sleeve is attached to the outer sleeve supporting spring is biased towards the storage position and axially displaceable against the pressure of the spring by means of an actuating element is, according to patent ... (patent application 33 41 759.8), thereby g e k e n n n z e i c n e t that the inner sleeve is made up of two cylinders connected to one another Diameter consists, with one spring outside the thinner and the other Spring is arranged within the thicker cylinder. 10. Writing implement with a sleeve-shaped housing and one in this Housing arranged writing element, which between one of the serving for writing The tip portion of the writing element releasing the ready-to-write position and a storage position retracted into the housing is displaceable, wherein the housing section adjacent to the tip section of the writing element made up of segments exists, which are radially spread apart in the ready-to-write position and in the storage position abut against each other and a closure part for the Form tip, the housing of an outer sleeve and a substantially arranged within the outer sleeve, limited relative to this in the axial direction slidable inner sleeve and which the closure part of Housing-forming segments are mounted on the inner sleeve, radially outward are under tension and partially outside of the outer sleeve where they are a larger outer diameter than the clear width of the tip-side end of the outer sleeve, and wherein the inner sleeve is attached to the outer sleeve supporting spring is biased towards the storage position and axially displaceable against the pressure of the spring by means of an actuating element is, according to patent ... (patent application 33 41 759.8), thereby g e k e n n n z e i c h n e t that the outer sleeve (1) is open to the rear and the inner sleeve se (7) protrudes backwards from the outer sleeve (1) in the storage position. 11. Writing implement with a sleeve-shaped housing and one in this Housing arranged writing element, which between one of the serving for writing The tip portion of the writing element releasing the ready-to-write position and a storage position retracted into the housing is displaceable, wherein the housing section adjacent to the tip section of the writing element made up of segments exists, which are radially spread apart in the ready-to-write position and in the storage position abut against each other and a closure part for the Form tip, the housing of an outer sleeve and a substantially arranged within the outer sleeve, relative to this in the axial direction limited there is displaceable inner sleeve and which form the closure part of the housing Segments are mounted on the inner sleeve, radially outwardly under bias stand and partially lie outside the outer sleeve, where they have a larger outer diameter than the inside width of the tip end of the outer sleeve, and where the inner sleeve via a spring supported on the outer sleeve in the direction is biased to the storage position and by means of an actuating element is axially displaceable against the pressure of the spring, according to patent ... (patent application 33 41 759.8), characterized in that the outer surface of the closure part tapers towards the rear in two stages of different inclination to the longitudinal axis, the portion of the weaker slope facing the tip portion. 12. Writing implement with a sleeve-shaped housing and one in this Housing arranged writing element, which between one of the serving for writing The tip portion of the writing element releasing the ready-to-write position and a storage position retracted into the housing is displaceable, wherein the housing section made up of segments and adjacent to the tip section of the writing element exists, which are radially spread apart in the ready-to-write position and in the storage position abut against each other and a closure part for the Form tip, the housing of an outer sleeve and a substantially within the outer sleeve arranged relative to this in There is axially limited displaceable inner sleeve and which the closure part of the housing forming segment are mounted on the inner sleeve, radially are under tension on the outside and are partially outside the outer sleeve, where they have a larger outer diameter than the inside diameter of the tip-side Have the end of the outer sleeve, and wherein the inner sleeve is attached to the outer sleeve supporting spring is biased towards the storage position is and axially displaceable against the pressure of the spring by means of an actuating element is, according to patent ... (patent application 33 41 759.8) for gapgarschreiber, thereby it is noted that there is a sealing surface on the inside of the segment tip is arranged for the tip and the helix exit, and that the actuating element acts on the inner sleeve and after a limited axial displacement of the inner Sleeve comes into contact with the writing element and acts on this and it axially shifts.