EP0869726A1 - Refillable soft lead pencil - Google Patents

Refillable soft lead pencil

Info

Publication number
EP0869726A1
EP0869726A1 EP97936678A EP97936678A EP0869726A1 EP 0869726 A1 EP0869726 A1 EP 0869726A1 EP 97936678 A EP97936678 A EP 97936678A EP 97936678 A EP97936678 A EP 97936678A EP 0869726 A1 EP0869726 A1 EP 0869726A1
Authority
EP
European Patent Office
Prior art keywords
shaft
lead
front part
push rod
sheath
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
EP97936678A
Other languages
German (de)
French (fr)
Other versions
EP0869726B1 (en
Inventor
Jürgen RAPS
Werner Zahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faber Castell AG
Original Assignee
AW Faber Castell GmbH and Co
AW Faber Castell Unternehmensverwaltung GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7801386&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0869726(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by AW Faber Castell GmbH and Co, AW Faber Castell Unternehmensverwaltung GmbH and Co filed Critical AW Faber Castell GmbH and Co
Publication of EP0869726A1 publication Critical patent/EP0869726A1/en
Application granted granted Critical
Publication of EP0869726B1 publication Critical patent/EP0869726B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

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
    • B43K21/027—Writing-core feeding mechanisms with sliding tubelike writing-core guide
    • 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
    • B43K21/08—Writing-core feeding mechanisms with the writing-cores fed by screws

Definitions

  • the invention relates to a pencil, in particular a soft lead pencil for cosmetic purposes
  • Such pins have a sleeve-like shaft with a front and a rear end, a push rod arranged coaxially in the shaft and fixed at one end to the rear end of the shaft in the axial direction, and a lead connected to the free end of the push rod.
  • the shaft and the front part are in accordance with Art of a screw mechanism rotatably connected to one another
  • the front part can be telescopically inserted into the shaft.
  • the front part releases the lead, which is fixed in the axial direction with respect to the shaft.
  • Such soft lead pins are described, for example, in US Pat Known soft-lead pencils, the front part also performs a relative rotational movement with respect to the mine when retracting or extending. Because of its often sticky and soft consistency, the mine can stick to the inside of the front part, especially when not used for a long time n retracted the front part, the mine can shear off due to the relative rotation between the front part and the lead
  • the object of the invention to improve a pin of the type mentioned in this regard.
  • This object is achieved in that the lead is rotatably connected to the push rod. If the lead sticks completely or only in sections to the inner surface of the front part, this does not have a disadvantage, at least when the front part is moved in, since the lead can rotate with the front part due to its rotatable fixation on the push rod. Shearing of the lead is thus prevented.
  • An embodiment according to the invention is also expedient in the case of pins in which the front part and shaft non-rotatable are connected to each other and the push rod designed as a screw spindle and interacting with the front part is rotatably mounted in the shaft
  • the lead is from the one pointing to the tip of the pen. End of a lead holder held The other end of the lead holder is rotatably fixed to the push rod, the lead holder being connected to the front part in a torque-locking manner.
  • the lead is prevented from shearing even with lead masses with a very soft consistency does not take place here via a friction or material connection between the lead and the front part, but preferably by means of a positive connection between the front part and lead holder effective in the direction of rotation.
  • the inner surface of the shank-side portion of the lead holder, a circumferential fixing groove available -, ⁇ , is *, in which a arranged at the tip end of the push rod ring projection in the manner of a snap connection engages
  • the screw-type connection between the shaft and the front part is designed in such a way that the push rod is rotationally fixed to the shaft
  • FIG. 1 shows a longitudinal section of a pin according to the invention
  • 2 shows the longitudinal section of a pin according to FIG. 1 with a lead shortened by use and with the front part inserted into the shaft
  • FIG. 6 shows the end of the front part of a pin according to the invention which cooperates with the push rods
  • the main components of a pin are a sleeve-shaped shaft 1, a sleeve-shaped front part 2, a push rod 3, a lead holder 4 and a lead 5.
  • the push rod 3 is an essentially cylindrical part with a extending helically around its central longitudinal axis 6 and forming an external thread.
  • the rear end of the shaft 1 is closed by a base 8, while the front end of which is open for receiving the front part 2.
  • the end of the shaft 12 facing the shaft base 8 in the assembled state has the push rod 3 a section with a larger diameter, namely a head part 9
  • a flange 13 is arranged at a distance from the rear end 12 of the push rod 3 and has two diametrically opposed locking projections 10 on its peripheral surface.
  • the locking projections 10 engage in complementarily shaped locking recesses 11 (FIG. 5 ) in the inner surface 14 d
  • the shaft 1 is rotatably fixed with respect to the shaft by this embodiment.
  • a fixation in the axial direction is brought about by a ring projection 15 arranged at a distance from the flange-like widening and near the end 12, which is radial from an annular surface 14 of the shaft 1 inward projecting fixing projection 16 is engaged on the side facing the flange 13.
  • the flange 13 bears against a stop shoulder 21 which faces the pin tip 17 and projects radially inward from the inner surface 14
  • the end region of the push rod 3 facing the pin tip 17 has no external thread.
  • This end region is in a first region 20 which adjoins the external thread or the screw groove 7 and a subdivided the and extending to the end 18 of the push rod second area.
  • the first region 20 has a diameter which corresponds to that of the region of the push rod which is provided with an external thread.
  • the second area has a smaller diameter and is used to fasten the lead holder 4.
  • the lead holder 4 is essentially a sleeve which, in the assembled state, is pushed with one end onto the second area 23 of the push rod 3. The area 23 is thus encompassed by one end of the lead holder 4 in the assembled state.
  • a radially inwardly projecting ring projection 24 is arranged on the inside of the lead holder, which engages in a constriction 19 of the second region 23 in the manner of a snap connection in the assembled state.
  • the lead holder is fixed in the axial direction, but is rotatably connected to the push rod 3.
  • the lead 5 lies axially and rotationally fixed at one end.
  • the lead holder has essentially the same diameter as the region 20.
  • Push rod 3 and lead holder 4 are arranged centrally in the shaft, the lead holder 4 partially protruding from the shaft or from the shaft opening 25 arranged at its front end facing away from the shaft bottom 8.
  • a hollow cylindrical receiving space 22 for receiving the front part 2 is arranged between the inner surface 14 of the shaft 1 and the outer peripheral surface of the push rod 3 and the lead holder 4.
  • the front part lies at least partially in the receiving space 22 and includes the push rod 3, the lead holder 4 and the lead 5, so it is arranged coaxially with these parts.
  • the lead holder 4 seen in cross section, has an octagonal outline shape.
  • the inner surface 31 of the front part is designed to be complementary, that is to say the lead holder 4 lies in the front part 2 with a positive engagement which is effective in the direction of rotation.
  • the end of the front part 2 lying in the shaft 1 or facing the shaft bottom 8 has two diametrically opposed windows 26. These windows are approximately U-shaped and each delimit an axially extending clamping jaw 27, the free end of which points towards the shaft bottom 8 on its inside facing the push rod 3 each have a locking cam 28 which engages in the screw groove 7.
  • the front part 2 is in this way motion-coupled to the push rod 3 in the manner of a spindle nut.
  • the clamping jaws 27 have a first section 29 and a second section 30 on the the second section 30 then extends on the first section 29 to the free end of the clamping jaws 27.
  • the upper side 32 of the sections 30 is chamfered towards the free end of the clamping jaws 27.
  • Inner surface 14 of the shaft 1 on The first section 29 has e a smaller wall thickness than the second section 30.
  • the end region of the front part 2, which has the clamping jaws 27, merges with an oblique shoulder 34 into a region of larger diameter, the outer circumferential surface of which cooperates with the inner surface 14 of the shaft in the sense of a sliding guide
  • a protective cap 35 which may be attached to the shaft 1, is first removed.
  • the front part is in a maximally extended position.
  • the locking cams 28 are arranged on the tip-side end of the screw groove 7
  • the lead 5, which has not yet been used, is so long that it protrudes with a protrusion from the front part 2 , 4) is rotated because the lead holder 4 is rotatably connected on the one hand to the push rod 3 and on the other hand is encased in the direction of rotation 31 with positive engagement on the front part, the lead 5 is also rotated in the direction of rotation 39 is thus prevented
  • the locking cams 28 move along the locking groove 7, so that the front part 2 is moved in the retraction direction 40, the shaft 1 and the front part 2 are so long against each other rotates until there is sufficient mine protrusion again.
  • the front part 2 can be moved in the direction of insertion 40 until its shaft-side end abuts the head part 9 of the push
  • the procedure for assembling a soft lead pin according to the invention is approximately as follows. First the lead holder 4, which is equipped with a lead 5, is pushed onto the push rod. The insertion movement runs in the direction of the central longitudinal axis of the pushing part or lead holder and the lead 4 into the constriction 19 of the push rod 3. Next, the front part 2 is pushed from the pin tip 17 over the lead 5 and finally over the lead holder 4 until the clamping jaws 27 engage with the locking cams 28 in the screw groove 7. i, the part 2 on the lead holder 4, the clamping jaws 27 are deflected radially outward in the direction of the arrows 38. The sections 29 of the clamping jaws with reduced wall thickness act as quasi film hinges This insertion movement ends the flange 13 on the stop surface 21 on the inner

Landscapes

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

Abstract

PCT No. PCT/EP97/04144 Sec. 371 Date Mar. 31, 1998 Sec. 102(e) Date Mar. 31, 1998 PCT Filed Jul. 30, 1997 PCT Pub. No. WO98/05235 PCT Pub. Date Feb. 12, 1998A pencil which has a tip and which dispenses a soft mass in use includes a sheath having front and back ends; a push rod positioned coxially within the sheath, having a sheath-side end, and being secured by its sheath-side end to the back end of the sheath in an axial direction; an elongate soft mass insert position coxially with the sheath; a front part which is a sleeve that envelopes the soft mass insert over at least a portion of its length, which is positioned coxially with the sheath and accommodated at least in part within the sheath, and which operates jointly with the sheath in the manner of a helical gear so that the fromt part retracts into the sheath by turning the front part relative to the sheath; and a soft mass insert holder which is connected to the front part so that it is engaged in the turning moment of the front part, which holds the elongate soft mass insert by one end thereof, which is rotatably secured to the push rod, and which is immovably secured to the push rod in the axial direction.

Description

Beschreibung description
WeichminenstiftSoft lead pencil
Die Erfindung betrifft einen Stift, insbesondere einen Weichminenstift für KosmetikzweckeThe invention relates to a pencil, in particular a soft lead pencil for cosmetic purposes
Derartige Stifte weisen einen hulsenartigen Schaft mit einem Vorder- und einem Hinterende, eine koaxial im Schaft angeordnete und mit ihrem einen Ende am Hinterende des Schaftes in Axialrichtung fixierte Schubstange sowie eine mit dem Freiende der Schubstange verbundene Mine auf Der Schaft und das Vorderteil sind nach Art eines Schraubgetriebes drehbar miteinander verbunden Durch eine Relativdrehung der genannten Teile kann das Vorderteil teleskopartig in den Schaft eingefahren werden Das Vorderteil gibt dabei die gegenüber dem Schaft in Axialrichtung fixierte Mine frei Derartige Weichminenstifte sind beispielsweise in US 5 364,197 und US 5,366,31 1 beschrieben Bei den bekannten Weichminenstiften fuhrt das Vorderteil beim Ein- bzw Ausfahren neben der axialen Bewegung auch eine relative Drehbewegung gegenüber der Mine aus Aufgrund ihrer oftmals klebrigen und weichen Konsistenz kann die Mine, insbesondere bei längerem Nichtgebrauch an der Innenseite des Vorderteils festkleben Wird dann das Vorderteil eingefahren, kann es aufgrund der Relativdrehung zwischen Vorderteil und Mine zu einem Abscheren der Mine kommenSuch pins have a sleeve-like shaft with a front and a rear end, a push rod arranged coaxially in the shaft and fixed at one end to the rear end of the shaft in the axial direction, and a lead connected to the free end of the push rod. The shaft and the front part are in accordance with Art of a screw mechanism rotatably connected to one another By a relative rotation of the parts mentioned, the front part can be telescopically inserted into the shaft. The front part releases the lead, which is fixed in the axial direction with respect to the shaft. Such soft lead pins are described, for example, in US Pat Known soft-lead pencils, the front part also performs a relative rotational movement with respect to the mine when retracting or extending. Because of its often sticky and soft consistency, the mine can stick to the inside of the front part, especially when not used for a long time n retracted the front part, the mine can shear off due to the relative rotation between the front part and the lead
Davon ausgehend ist es die Aufgabe der Erfindung, einen Stift der eingangs genannten Art in dieser Hinsicht zu verbessern Diese Aufgabe wird dadurch gelost, daß die Mine mit der Schubstange drehbar verbunden ist Falls die Mine vollständig oder auch nur abschnittsweise an der Innenflache des Vorderteils festklebt, so wirkt sich dies zumindest bei der Einfahrbewegung des Vorderteils nicht nachteilig aus, da die Mine sich aufgrund ihrer drehbaren Fixierung an der Schubstange mit dem Vorderteil mitdrehen kann Ein Abscheren der Mine ist somit verhindert Eine erfmdungsgemaße Ausgestaltung ist auch bei solchen Stiften zweckmäßig, bei denen Vorderteil und Schaft drehfest mitemander verbunden sind und die als Schraubspindel ausgebildete und mit dem Vorderteil zusammenwirkende Schubstange drehbar im Schaft gelagert istBased on this, it is the object of the invention to improve a pin of the type mentioned in this regard. This object is achieved in that the lead is rotatably connected to the push rod. If the lead sticks completely or only in sections to the inner surface of the front part, this does not have a disadvantage, at least when the front part is moved in, since the lead can rotate with the front part due to its rotatable fixation on the push rod. Shearing of the lead is thus prevented. An embodiment according to the invention is also expedient in the case of pins in which the front part and shaft non-rotatable are connected to each other and the push rod designed as a screw spindle and interacting with the front part is rotatably mounted in the shaft
Bei einer bevorzugten Ausfuhrungsform ist die Mine von dem zur Stiftspitze weisenden -. Ende eines Minenhalters gehalten Das andere Ende des Minenhalters ist drehbar an der Schubstange fixiert, wobei der Minenhalter drehmomentschlussig mit dem Vorderteil verbunden ist Mit einer solchen Ausgestaltung ist gewährleistet, daß ein Abscheren der Mine auch bei Minenmassen mit sehr weicher Konsistenz verhindert ist Das Mitdrehen der Mine erfolgt hier nicht über einen Reib- oder Stoffschluß zwischen Mine und 10 Vorderteil, sondern vorzugsweise durch einen in Drehrichtung wirksamen Formschluß zwischen Vorderteil und Minenhalter Die drehbare Verbindung zwischen dem Minenhalter und dem spitzenseitigen Ende der Schubstange wird auf konstruktiv einfache und insbesondere montagefreundliche Weise dadurch erreicht, daß in der Innenflache des schaftseitigen Abschnitts des Minenhalters eine umlaufende Fixiernut vorhanden -,■*, ist, in die ein am spitzenseitigen Ende der Schubstange angeordneter Ringvorsprung nach Art einer Schnappverbindung eingreiftIn a preferred embodiment, the lead is from the one pointing to the tip of the pen. End of a lead holder held The other end of the lead holder is rotatably fixed to the push rod, the lead holder being connected to the front part in a torque-locking manner. With such a configuration, it is ensured that the lead is prevented from shearing even with lead masses with a very soft consistency does not take place here via a friction or material connection between the lead and the front part, but preferably by means of a positive connection between the front part and lead holder effective in the direction of rotation. in that the inner surface of the shank-side portion of the lead holder, a circumferential fixing groove available -, ■, is *, in which a arranged at the tip end of the push rod ring projection in the manner of a snap connection engages
Bei einer bevorzugten Ausfuhrungsform ist die schraubgetπebeartige Verbindung zwischen Schaft und Vorderteil so ausgestaltet, daß die Schubstange am Schaft drehfixiertIn a preferred embodiment, the screw-type connection between the shaft and the front part is designed in such a way that the push rod is rotationally fixed to the shaft
20 ist und ein Außengewinde aufweist, in das das Vorderteil eingreift Besonders in montagetechnischer Hinsicht vorteilhaft ist es, wenn zwischen dem Außengewinde der Schubstange und dem Vorderteil eine Schnappverbindung mit axial verlaufender Fugerichtung wirksam ist Eine solche Schnappverbindung wird in vorteilhafter Weise dadurch realisiert, daß am schaftseitigen Ende des Vorderteils eine Klemmbacke ange-20 and has an external thread in which the front part engages It is particularly advantageous in terms of assembly technology if a snap connection with an axially extending joint direction is effective between the external thread of the push rod and the front part. Such a snap connection is advantageously realized in that on the shaft side At the end of the front part
25 formt ist, die mit dem Außengewinde der Schubstange in Eingriff steht und in Eingriffsrichtung elastisch vorgeformt ist25 is formed, which is in engagement with the external thread of the push rod and is preformed elastically in the direction of engagement
Die Erfindung wird nun anhand der beigefugten Zeichnungen naher erläutert Es zeigenThe invention will now be explained in more detail with reference to the accompanying drawings
3030
Fig 1 einen Längsschnitt eines erfindungsgemaßen Stiftes, Fig 2 den Längsschnitt eines Stiftes gemäß Fig 1 mit einer durch Gebrauch verkürzten Mine und mit in den Schaft eingefahrenem Vorderteil,1 shows a longitudinal section of a pin according to the invention, 2 shows the longitudinal section of a pin according to FIG. 1 with a lead shortened by use and with the front part inserted into the shaft,
Fig 3 einen Querschnitt längs der Linie III - III in Fig 1 ,3 shows a cross section along the line III-III in FIG. 1,
Fig 4 einen Querschnitt gemäß der Linie IV - IV in Fig 1 ,4 shows a cross section along the line IV-IV in FIG. 1,
Fig 5 eine Querschnitt gemäß der Linie V - V in Fig 1 , und5 shows a cross section along the line V - V in FIG. 1, and
Fig 6 das mit der Schubstnge zusammenwirkende Ende des Vorderteils eines er- findungsgemaßen Stiftes6 shows the end of the front part of a pin according to the invention which cooperates with the push rods
Wie aus Fig 1 und insbesondere aus Fig 2 ersichtlich ist, sind die Hauptbestandteile eines erfindungsgemäßen Stiftes ein hulsenformiger Schaft 1 , ein hulsenformiges Vorderteil 2, eine Schubstange 3, ein Minenhalter 4 und eine Mine 5 Die Schubstange 3 ist ein im wesentlichen zylindrisches Teil mit einer sich schraubenförmig um ihre Mittel- langsachse 6 erstreckenden und ein Außengewinde bildenden Schraubennut 7 Das Hinterende des Schaftes 1 ist durch einen Boden 8 verschlossen, wahrend dessen Vorderende zur Aufnahme des Vorderteils 2 offen ist An ihrem im Montagezustand dem Schaftboden 8 zugewandten Ende 12 weist die Schubstange 3 einen Abschnitt mit größerem Durchmesser, nämlich ein Kopfteil 9 auf Mit Abstand vor dem hinteren Ende 12 der Schubstange 3 ist ein Flansch 13 angeordnet, der an seiner Umfangsflache zwei diametral gegenüberliegende Rastvorsprunge 10 aufweist Die Rastvorsprunge 10 greifen in komplementär ausgeformte Rastausnehmungen 11 (Fig 5) in der Innenflache 14 des Schaftes 1 ein Durch diese Ausgestaltung ist die Schubstange 3 gegenüber dem Schaft drehfixiert Eine Fixierung in Axialrichtung ist durch einen mit Abstand zur flanschartigen Verbreiterung und nahe dem Ende 12 angeordneten Ringvorsprung 15 bewirkt, der von einem ringförmigen, von der Innenflache 14 des Schaftes 1 radial nach innen vorstehenden Fixiervorsprung 16 auf der dem Flansch 13 zugewandten Seite hintergriffen wird Der Flansch 13 hegt an einer zur Stiftspitze 17 weisenden und von der Innenflache 14 radial nach innen vorstehenden Anschlagschulter 21 anAs can be seen from FIG. 1 and in particular from FIG. 2, the main components of a pin according to the invention are a sleeve-shaped shaft 1, a sleeve-shaped front part 2, a push rod 3, a lead holder 4 and a lead 5. The push rod 3 is an essentially cylindrical part with a extending helically around its central longitudinal axis 6 and forming an external thread. The rear end of the shaft 1 is closed by a base 8, while the front end of which is open for receiving the front part 2. The end of the shaft 12 facing the shaft base 8 in the assembled state has the push rod 3 a section with a larger diameter, namely a head part 9 A flange 13 is arranged at a distance from the rear end 12 of the push rod 3 and has two diametrically opposed locking projections 10 on its peripheral surface. The locking projections 10 engage in complementarily shaped locking recesses 11 (FIG. 5 ) in the inner surface 14 d The shaft 1 is rotatably fixed with respect to the shaft by this embodiment. A fixation in the axial direction is brought about by a ring projection 15 arranged at a distance from the flange-like widening and near the end 12, which is radial from an annular surface 14 of the shaft 1 inward projecting fixing projection 16 is engaged on the side facing the flange 13. The flange 13 bears against a stop shoulder 21 which faces the pin tip 17 and projects radially inward from the inner surface 14
Der der Stiftspitze 17 zugewandte Endbereich der Schubstange 3 weist kein Außengewinde auf Dieser Endbereich ist in einen sich an das Außengewinde bzw die Schraubennut 7 anschließenden ersten Bereich 20 und einen sich daran anschließen- den und sich bis zum Ende 18 der Schubstange erstreckenden zweiten Bereich untergliedert. Der erste Bereich 20 weist einen Durchmesser auf, der jenem des mit einem Außengewinde versehenen Bereiches der Schubstange entspricht. Der zweite Bereich hat einen kleineren Durchmesser und dient zur Befestigung des Minenhalters 4. Der Minenhalter 4 ist im wesentlichen eine Hülse, die im Montagezustand mit ihrem einen Ende auf den zweiten Bereich 23 der Schubstange 3 aufgesteckt ist. Der Bereich 23 ist also im Montagezustand von dem einen Ende des Minenhalters 4 umfaßt. Zur Fixierung in Axialrichtung ist auf der Innenseite des Minenhalters ein radial nach innen vorstehender Ringvorsprung 24 angeordnet, der im Montagezustand in eine Einschnürung 19 des zweiten Bereiches 23 nach Art einer Schnappverbindung eingreift. Durch diese Ausgestaltung ist der Minenhalter in Axialrichtung fixiert, jedoch drehbar mit der Schubstange 3 verbunden. In dem sich von dem Ringvorsprung 24 in Richtung Stift- spitze 17 wegerstreckenden Bereich des Minenhalters 4 liegt die Mine 5 mit ihrem einen Ende axial - und drehfixiert ein. Der Minenhalter hat im wesentlichen den gleichen Durchmesser wie der Bereich 20. Schubtstange 3 und Minenhalter 4 sind zentral im Schaft angeordnet, wobei der Minenhalter 4 teilweise aus dem Schaft bzw. aus der an seinem dem Schaftboden 8 abgewandten Vorderende angeordneten Schaftöffnung 25 hinausragt.The end region of the push rod 3 facing the pin tip 17 has no external thread. This end region is in a first region 20 which adjoins the external thread or the screw groove 7 and a subdivided the and extending to the end 18 of the push rod second area. The first region 20 has a diameter which corresponds to that of the region of the push rod which is provided with an external thread. The second area has a smaller diameter and is used to fasten the lead holder 4. The lead holder 4 is essentially a sleeve which, in the assembled state, is pushed with one end onto the second area 23 of the push rod 3. The area 23 is thus encompassed by one end of the lead holder 4 in the assembled state. For fixing in the axial direction, a radially inwardly projecting ring projection 24 is arranged on the inside of the lead holder, which engages in a constriction 19 of the second region 23 in the manner of a snap connection in the assembled state. With this configuration, the lead holder is fixed in the axial direction, but is rotatably connected to the push rod 3. In the area of the lead holder 4 which extends away from the annular projection 24 in the direction of the pin tip 17, the lead 5 lies axially and rotationally fixed at one end. The lead holder has essentially the same diameter as the region 20. Push rod 3 and lead holder 4 are arranged centrally in the shaft, the lead holder 4 partially protruding from the shaft or from the shaft opening 25 arranged at its front end facing away from the shaft bottom 8.
Zwischen der Innenfläche 14 des Schaftes 1 und der Außenumfangsfläche der Schubstange 3 und des Minenhalters 4 ist ein hohlzylinderförmiger Aufnahmeraum 22 zur Aufnahme des Vorderteils 2 angeordnet. Im Montagezustand liegt das Vorderteil zumindest teilweise im Aufnahmeraum 22 ein und umfaßt die Schubstange 3, den Minenhalter 4 und die Mine 5, es ist also koaxial zu diesen Teilen angeordnet.A hollow cylindrical receiving space 22 for receiving the front part 2 is arranged between the inner surface 14 of the shaft 1 and the outer peripheral surface of the push rod 3 and the lead holder 4. In the assembled state, the front part lies at least partially in the receiving space 22 and includes the push rod 3, the lead holder 4 and the lead 5, so it is arranged coaxially with these parts.
Wie aus Fig. 3 hervorgeht, weist der Minenhalter 4, im Querschnitt gesehen, eine achteckige Umrißform auf. Die Innenfläche 31 des Vorderteils ist komplementär ausgestaltet, der Minenhalter 4 liegt also mit einem in Drehrichtung wirksamen Formschluß im Vorderteil 2 ein. Das im Schaft 1 einliegende bzw das dem Schaftboden 8 zugewandte Ende des Vorderteils 2 weist zwei diametral gegenüberliegende Fenster 26 auf Diese Fenster sind etwa U-formig und umgrenzen jeweils eine sich in Axialrichtung erstreckende Klemmbacke 27, deren Freiende zum Schaftboden 8 weist Die Klemmbacken 27 weisen auf ihrer der Schubstange 3 zugewandten Innenseite jeweils eine Rastnocke 28 auf, die in die Schraubennut 7 eingreift Das Vorderteil 2 ist auf diese Weise mit der Schubstange 3 nach Art eines Spindeltnebs bewegungsgekoppelt Die Klemmbacken 27 weisen einen ersten Abschnitt 29 und einen zweiten Abschnitt 30 auf Der zweite Abschnitt 30 erstreckt sich anschließend am ersten Abschnitt 29 bis zum Freiende der Klemmbak- ken 27 Die Oberseite 32 der Abschnitte 30 ist zum Freiende der Klemmbacken 27 hin abgeschrägt Im Montagezustand liegt nur der an den ersten Abschnitt 29 angrenzenden Bereich 33 des Abschnitts 30 an der Innenflache 14 des Schaftes 1 an Der erste Abschnitt 29 hat eine geringere Wandstarke als der zweite Abschnitt 30 Der die Klemmbacken 27 aufweisende Endbereich des Vorderteils 2 geht mit einer Schrag- schulter 34 in einen Bereich größeren Durchmessers über, dessen Außenumfangsfla- che mit der Innenflache 14 des Schaftes im Sinne einer Gleitfuhrung zusammenwirktAs can be seen from Fig. 3, the lead holder 4, seen in cross section, has an octagonal outline shape. The inner surface 31 of the front part is designed to be complementary, that is to say the lead holder 4 lies in the front part 2 with a positive engagement which is effective in the direction of rotation. The end of the front part 2 lying in the shaft 1 or facing the shaft bottom 8 has two diametrically opposed windows 26.These windows are approximately U-shaped and each delimit an axially extending clamping jaw 27, the free end of which points towards the shaft bottom 8 on its inside facing the push rod 3 each have a locking cam 28 which engages in the screw groove 7. The front part 2 is in this way motion-coupled to the push rod 3 in the manner of a spindle nut. The clamping jaws 27 have a first section 29 and a second section 30 on the the second section 30 then extends on the first section 29 to the free end of the clamping jaws 27. The upper side 32 of the sections 30 is chamfered towards the free end of the clamping jaws 27. In the assembled state, only the region 33 of the section 30 adjoining the first section 29 lies against it Inner surface 14 of the shaft 1 on The first section 29 has e a smaller wall thickness than the second section 30. The end region of the front part 2, which has the clamping jaws 27, merges with an oblique shoulder 34 into a region of larger diameter, the outer circumferential surface of which cooperates with the inner surface 14 of the shaft in the sense of a sliding guide
Im folgenden wird die Arbeitsweise eines erfindungsgemaßen Stiftes erläutert Ausgehend von der in Fig 1 dargestellten Situation wird zunächst eine gegebenenfalls auf den Schaft 1 aufgesteckte Schutzkappe 35 entfernt Das Vorderteil befindet sich in einer maximal ausgefahrenen Position Die Rastnocken 28 sind dabei am spitzenseitigen Ende der Schraubennut 7 angeordnet Die noch nicht benutzte Mine 5 ist so lang, daß sie mit einem Überstand aus dem Vorderteil 2 hinaussteht Wenn der Überstand aufgebraucht ist werden Schaft 1 und Vorderteil 2 relativ zueinander verdreht, indem beispielsweise der Schaft 1 festgehalten und das Vorderteil in Drehrichtung 39 (Fig 3,4) gedreht wird Da der Minenhalter 4 einerseits drehbar mit der Schubstange 3 verbunden ist und andererseits mit in Drehrichtung 31 wirksamem Formschluß on dem Vorderteil umfaßt ist, wird die Mine 5 in Drehrichtung 39 mitgedreht Ein Abscheren der Mine 5 infolge einer Relativdrehung gegenüber dem Vorderteil ist somit verhindert Die Rastnocken 28 bewegen sich entlang der Rastnut 7, so daß das Vorderteil 2 in Einfahrrichtung 40 bewegt wird Schaft 1 und Vorderteil 2 werden so lange gegeneinander ver- dreht, bis wieder ein ausreichender Minenuberstand vorhanden ist Das Vorderteil 2 kann so lange in Einfuhrrichtung 40 bewegt werden, bis sein schaftseitiges Ende an dem Kopfteil 9 der Schubstange 3, wie in Fig 2 dargestellt, anstoßt Zum Ausfahren des Vorderteils wird es entgegengesetzt zur Drehrichtung 40 gegenüber dem Schaft verdrehtThe method of operation of a pin according to the invention is explained below. Starting from the situation shown in FIG. 1, a protective cap 35, which may be attached to the shaft 1, is first removed. The front part is in a maximally extended position. The locking cams 28 are arranged on the tip-side end of the screw groove 7 The lead 5, which has not yet been used, is so long that it protrudes with a protrusion from the front part 2 , 4) is rotated because the lead holder 4 is rotatably connected on the one hand to the push rod 3 and on the other hand is encased in the direction of rotation 31 with positive engagement on the front part, the lead 5 is also rotated in the direction of rotation 39 is thus prevented The locking cams 28 move along the locking groove 7, so that the front part 2 is moved in the retraction direction 40, the shaft 1 and the front part 2 are so long against each other rotates until there is sufficient mine protrusion again. The front part 2 can be moved in the direction of insertion 40 until its shaft-side end abuts the head part 9 of the push rod 3, as shown in FIG. 2. To extend the front part, it is opposite to the direction of rotation 40 twisted relative to the shaft
Zur Montage eines erfindungsgemaßen Weichminenstiftes wird etwa so vorgegangen Zunächst wird auf die Schubstange der mit einer Mine 5 bestuckte Minenhalter 4 aufgeschoben Die Einfugebewegung verlauft dabei in Richtung der Mittellangsachse des o Schubteils bzw des Minenhalters und der Mine Am Ende der Aufsteckbewegung schnappt der Ringvorsprung 24 des Minenhalters 4 in die Einschnürung 19 der Schubstange 3 ein Als nächstes wird das Vorderteil 2 von der Stiftspitze 17 her über die Mine 5 und schließlich über den Minenhalter 4 aufgeschoben, bis die Klemmbacken 27 mit ihren Rastnocken 28 in die Schraubennut 7 einrasten Beim Aufschieben des Vor- i, derteils 2 auf den Minenhalter 4 werden die Klemmbacken 27 in Richtung der Pfeile 38 radial nach außen abgelenkt Die Abschnitte 29 der Klemmbacken mit verringerter Wandstarke wirken dabei quasi als Folienscharniere Als letzter Schritt wird der Schaft 1 auf das Ende 12 der Schubstange 3 aufgeschoben Am Ende dieser Einschubbewegung schlagt der Flansch 13 an der Anschlagflache 21 an der Innenfla-The procedure for assembling a soft lead pin according to the invention is approximately as follows. First the lead holder 4, which is equipped with a lead 5, is pushed onto the push rod. The insertion movement runs in the direction of the central longitudinal axis of the pushing part or lead holder and the lead 4 into the constriction 19 of the push rod 3. Next, the front part 2 is pushed from the pin tip 17 over the lead 5 and finally over the lead holder 4 until the clamping jaws 27 engage with the locking cams 28 in the screw groove 7. i, the part 2 on the lead holder 4, the clamping jaws 27 are deflected radially outward in the direction of the arrows 38. The sections 29 of the clamping jaws with reduced wall thickness act as quasi film hinges This insertion movement ends the flange 13 on the stop surface 21 on the inner
20 ehe 14 des Schaftes 1 an 20 before 14 of the shaft 1
BezugszeichenlisteReference list
Schaft 21 Anschlagschulter Vorderteil 22 Aufnahmeraum Schubstange 23 zweiter Bereich Minenhalter 24 Ringvorsprung Mine 25 Schaftöffung Mittellangachse 26 Fenster Schraubennut 27 Klemmbacke Schaftboden 28 Rastnocke Kopfteil 29 erster Abschnitt Rastvorsprung 30 zweiter Abschnitt Rastausnehmung 31 Innenflache Ende 32 Oberseite Flansch 33 Bereich Innenflache 34 Schragschulter Ringvorsprung 35 Schutzkappe Fixiervorsprung 36 Überstand Stiftspitze 37 Ende Ende 38 Pfeilrichtung Einschnürung 39 Drehrichtung erster Bereich 40 Einführrichtung Shaft 21 stop shoulder front part 22 receiving space push rod 23 second area lead holder 24 ring projection lead 25 shaft opening central longitudinal axis 26 window screw groove 27 clamping jaw shaft bottom 28 locking cam head part 29 first section locking projection 30 second section locking recess 31 inner flat end 32 top flange 33 area inner surface 34 sloping shoulder ring projection 35 protective cap fixing cap Projection pin tip 37 end end 38 arrow direction constriction 39 direction of rotation first area 40 insertion direction

Claims

AnsprucheExpectations
Stift, insbesondere Weichminenstift, mit einem hulsenartigen Schaft (1 ) mit einem Vorder- und einem Hinterende, einer koaxial im Schaft (1) angeordneten und mit ihrem schaftseitigen Ende am Hinterende des Schaftes (1) in Axialrichtung fixierten Schubstange (3), einer mit dem Freiende der Schubstange unmittelbar oder mittelbar verbunde einem die Mine (5) zumindest auf einem Teil ihrer Lange umhüllenden hulsenartigen Vorderteil (2), das mit dem Schaft nach Art eines Schraubgetriebes zusammenwirkt und das durch Relativdrehung gegenüber dem Schaft in diesen einfahrbar ist, dadurch gekennzeichnet, daß die Mine (5) mit der Schubstange (3) drehbar verbunden istPin, in particular soft lead pin, with a sleeve-like shaft (1) with a front and a rear end, a coaxially arranged in the shaft (1) and with its shaft end at the rear end of the shaft (1) fixed in the axial direction, a push rod (3), one with directly or indirectly connected to the free end of the push rod a sleeve-like front part (2) enveloping the lead (5) at least on part of its length, which cooperates with the shaft in the manner of a screw mechanism and which can be moved into the shaft by relative rotation relative to the shaft, characterized in that the lead (5) also the push rod (3) is rotatably connected
Stift nach Anspruch 1 , gekennzeichnet durch einen mit einem der Stiftspitze (17) zugewandten einen Ende die Mine (5) haltenden und mit seinem schaftseitigen Ende drehbar an der Schubstange (3) fixierten Minenhalter (4), der drehmomentschlussig mit dem Vorderteil (2) verbunden istPen according to claim 1, characterized by a lead holder (4) which holds the lead (5) at one end and which holds the lead (5) and which is rotatably fixed to the push rod (3) by its shaft end, which leads to the front part (2) in a torque-locking manner. connected is
Stift nach Anspruch 2, dadurch gekennzeichnet, daß der Minenhalter (4) eine Hülse ist, in deren der Stiftspitze (17) zugewandten Abschnitt die Mine (5) mit ihrem schaftseitigen Ende einhegt und die mit in Drehrichtung wirksamem Formschluß vom Vorderteil (2) umfaßt istPen according to claim 2, characterized in that the lead holder (4) is a sleeve, in the section facing the pin tip (17) of which the lead (5) hangs in with its shaft-side end and which includes the front part (2) with positive locking in the direction of rotation is
Stift nach Anspruch 3, dadurch gekennzeichnet, daß in der Innenflache des schaftseitigen Abschnitts des Minenhalters (4) ein radial nach innen vorspringender Ringvorsprung angeordnet ist, der in eine am spit- zenseitigen Ende (18) der Schubstange (3) angeordnete Einschnürung (19) nach Art einer Schnappverbindung eingreiftPen according to claim 3, characterized in that a radially inwardly projecting ring projection is arranged in the inner surface of the shaft-side section of the lead holder (4), which in a spit- the conical end (18) of the push rod (3) arranged constriction (19) engages in the manner of a snap connection
Stift nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Schubstange (3) am Schaft (1) drehfixiert ist und in ihrer Umfangsflache eine ein Außengewinde bildende Schraubennut (7) aufweist, in die das Vorderteil (2) eingreiftPin according to one of claims 1 to 4, characterized in that the push rod (3) is rotationally fixed to the shaft (1) and has in its peripheral surface a screw groove (7) forming an external thread, into which the front part (2) engages
Stift nach Anspruch 5, gekennzeichnet durch eine zwischen der Schraubennut (7) und dem Vorderteil (2) wirksame Schnappverbindung mit in Axialrichtung verlaufender FugerichtungPin according to claim 5, characterized by a snap connection which is effective between the screw groove (7) and the front part (2) and has a joint direction running in the axial direction
Stift nach Anspruch 6, gekennzeichnet durch wenigstens eine am schaftseitigen Ende des Vorderteils (2) angeformte, mit der Schraubennut (7) in Eingriff stehende und in Eingriffsrichtung elastisch vorgespannte Klemmbacke (27) Pin according to Claim 6, characterized by at least one clamping jaw (27) formed on the shaft-side end of the front part (2), which engages with the screw groove (7) and is elastically prestressed in the direction of engagement.
EP97936678A 1996-08-01 1997-07-30 Refillable soft lead pencil Revoked EP0869726B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19630906 1996-08-01
DE19630906A DE19630906A1 (en) 1996-08-01 1996-08-01 Soft lead pencil
PCT/EP1997/004144 WO1998005235A1 (en) 1996-08-01 1997-07-30 Refillable soft lead pencil

Publications (2)

Publication Number Publication Date
EP0869726A1 true EP0869726A1 (en) 1998-10-14
EP0869726B1 EP0869726B1 (en) 2001-03-07

Family

ID=7801386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97936678A Revoked EP0869726B1 (en) 1996-08-01 1997-07-30 Refillable soft lead pencil

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US (1) US6149331A (en)
EP (1) EP0869726B1 (en)
JP (1) JPH11513923A (en)
AT (1) ATE199489T1 (en)
DE (2) DE19630906A1 (en)
ES (1) ES2157082T3 (en)
WO (1) WO1998005235A1 (en)

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JP2002336042A (en) * 2001-05-14 2002-11-26 Suzuno Kasei Kk Bar-shaped cosmetic material container
FR2880626B1 (en) * 2005-01-13 2008-04-18 Aventis Pharma Sa DERIVATIVES OF PURINE, COMPOSITIONS CONTAINING SAME AND USE THEREOF
DE102009055240A1 (en) * 2009-09-04 2011-03-24 Faber-Castell Ag tommy
US8764329B2 (en) 2010-07-09 2014-07-01 Cosmolab, Inc. Pivoting mechanical applicator
US20120064481A1 (en) * 2010-09-13 2012-03-15 Wade Cannon Composite delivery system
FR3031023B1 (en) * 2014-12-30 2018-03-30 L'oreal RECHARGE FOR INSERTION IN HAIR TREATMENT DEVICE BY TILTING
IT201800003568A1 (en) * 2018-03-14 2019-09-14 Cosmei S R L COSMETIC PACKAGING
CN109455025A (en) * 2018-11-15 2019-03-12 翟文杰 One kind is based on the dedicated dual-purpose writing pencil of novel touch screen of imparting knowledge to students

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US1916199A (en) * 1932-08-24 1933-07-04 Wahl Co Writing implement
DE3728427C1 (en) * 1987-08-26 1988-12-01 Schwan Stabilo Schwanhaeusser Application device with a mine from a spreadable mass
DE4222759C2 (en) * 1992-07-10 1995-04-27 Dieter Bakic Design S R I Cosmetic pencil with exchange part
US5364197A (en) * 1993-12-20 1994-11-15 Powers Ronald J Cosmetic pencil with descending sheath
US5547300A (en) * 1993-12-20 1996-08-20 Powers; Ronald J. Cosmetic pencil with threads positioned on flexible arms
US5366311A (en) * 1993-12-20 1994-11-22 Powers Ronald J Cosmetic pencil with descending sheath
DE4445230C2 (en) * 1994-12-17 1997-11-20 Schwan Stabilo Cosmetics Gmbh Cosmetic stick

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Also Published As

Publication number Publication date
ES2157082T3 (en) 2001-08-01
WO1998005235A1 (en) 1998-02-12
ATE199489T1 (en) 2001-03-15
DE19630906A1 (en) 1998-02-05
EP0869726B1 (en) 2001-03-07
DE59703103D1 (en) 2001-04-12
JPH11513923A (en) 1999-11-30
US6149331A (en) 2000-11-21

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