EP1365929A1

EP1365929A1 - Sharpener

Info

Publication number: EP1365929A1
Application number: EP02722135A
Authority: EP
Inventors: Ernst Fischer
Original assignee: Fischer Julia
Current assignee: Fischer Julia
Priority date: 2001-02-25
Filing date: 2002-02-25
Publication date: 2003-12-03
Also published as: CA2476863A1; WO2002068215A1; US20050044730A1

Abstract

The invention relates to a sharpener (1) for sharpening pencils (16), comprising a cutting device (12), a holding device (14) and a housing (10).

Description

sharpener

The invention relates to a sharpener for pencils which have a lead, such as pencils, colored pencils and in particular cosmetic pencils and the like.

Already known sharpeners have a housing with an opening into which a pen to be sharpened can be inserted. The one end of this pin makes contact with an angled aligned to the longitudinal axis of the pin cutting edge such that during a rotary movement or helical movement of the pin ^• to. its longitudinal axis forms a tapered cutting surface at the end of the pin.

These known sharpener can be used to sharpen pens with a substantially cylindrical lead, in which a carrier body encases this lead, which is usually made of wood and has a circular or hexagonal cross section.

With many types of pencils, but especially with cosmetic pencils and the like, there is a desire not to make the tip conical. One of the reasons for this is that the material for these tips is very soft and that on the one hand a good strength of the lead is desired, but on the other hand a not too large contact area for applying the material of the tip is desired.

The invention is therefore based on the object of providing a sharpener for sharpening pencils which is of a different technical design. In particular, the invention is the The object of the present invention is to create a sharpener for sharpening pencils, by means of which pencils with essentially any cross section of the carrier body and the lead can be sharpened in a reliable manner.

The object is achieved by a sharpener according to claim 1.

Preferred developments of the invention are the subject of the dependent claims.

According to the invention, a pencil sharpener is proposed, which has a cutting device, a holding device for the pin, at least one housing and a positive guidance device.

According to the invention, the pin is received in particular by the holding device. The holding device preferably encompasses the pin on its outer circumference. The holding device is arranged within the sharpener in such a way that a free end of the pin which is to be sharpened is located outside the holding device, so that it can contact the cutting device. The pin is preferably held in a rotationally fixed manner within the holding device, so that rotation about an axis parallel to its longitudinal axis is prevented. The pin to be pointed is particularly preferably received in a form-fitting manner in the holding device. The pin is preferably mounted in the holding device so as to be axially displaceable with respect to its longitudinal axis, so that it can be moved in the direction of the cutting device.

The housing preferably has at least two housing parts, of which one housing part is a cover. The housing parts are connected to each other. In particular, the housings set parts welded together, in particular ultrasonically welded, glued or screwed.

The positive guidance device has at least one guide element and at least one guide path, in which the guide element is positively guided when the pin is pointed.

The guideway is in particular formed by a cam disc or has one. The guideway is particularly preferably formed by a courage. It is preferred that the guideway is formed by a profiling. The guideway is particularly preferably formed by a groove which has a constant or varying groove depth. A positive guidance realized by means of a varying groove depth or a positive guidance realized by means of the groove course or the combination of these positive guidance is particularly preferred according to the invention.

According to a particularly preferred embodiment of the invention, a disc extending concentrically around the Halteeinrich- ^ tung, which ^'can hold / wherein ^-' the pin is a groove having a varying along the circumference groove depth provided on ^"the outer circumference of this disc, so that at least a guide pin firmly connected to the housing engages in this groove and changes the position of the pin or the holding device relative to the housing in accordance with a predetermined characteristic.

Particularly preferably, grooves are arranged on one or both end faces of a disk which extends concentrically around the holding device and into which guide pins firmly connected to the housing engage, these grooves being identical in terms of their course or at least differing in terms of their course. The guideway or ^' the groove is a closed path. The guide element is particularly preferably designed as a guide pin, which is guided in particular in a groove.

A plurality of differently shaped guideways are preferably provided.

The use of a guide groove already has the advantage that the holding device can be guided in a predetermined manner when it is rotated about the axis.

The use of two guide grooves, which are arranged on both sides of the disk-like extension of the holding device and into which a pin fixedly connected to the housing engages, has the essential advantage that the movement path of the pin relative to the knife fixedly arranged in the housing can be chosen in any way Way can be chosen.

In the case of an elliptical pin, this is preferably the case in such a way that one guideway ensures that the pin is moved up and down while the other guideway is moving. - ■ acts that the pin is moved against the knife and away from the knife. This creates a chisel-shaped cutting edge, which is particularly advantageous for thick colored pencils or cosmetic pencils.

In particular, a suitable selection of the guide grooves can ensure that the position of the lead relative to the knife is optimal, and in particular that the clearance angle that is required for a good cut is in the optimum range in each case.

A sharpener according to the invention can be used in particular for pencils which have a lead of essentially any shape in cross section. This mine can in particular be non-rotationally symmetrical. The cross section of this lead is preferably elliptical. The mine carrier can likewise have an essentially arbitrary cross-sectional area and in particular be elliptical.

In addition, a sharpener according to the invention, in particular in accordance with the design of its positive guidance device, can be used for a large number of further forms of the mine carrier, which is in particular a wooden casing which extends essentially along the mine axis and which extends around the mine and thus in particular also protects it become.

Particularly preferably, two grooves are provided on the respective end faces, each of which is used to guide a pin which is fixedly mounted in the housing.

The cutting device, in particular the cutting edge, is particularly preferably arranged fixedly with respect to the housing. "Sόπders - preferably the cutting edge is ^" "- ^" fixed - with the housing ^" - vexToühden, which is produced in particular by means of a screw connection or the like.

The pin is preferably received in the holding device in a rotationally fixed manner with respect to its longitudinal axis, the holding device, ie also the pin, being arranged so as to be movable relative to the cutting device. The pin is preferably received in a form-fitting manner in the holding device. When the pen is sharpened, the holding device, and thus the pen, is moved relative to the cutting device.

The pin is preferably received in an axially displaceable manner in the holding device so that it moves in the direction of the cutting insert. direction can be shifted and the cutting surface of the pin can be shaped by means of a rotary movement of the pin relative to the cutting device.

According to a particularly preferred embodiment of the invention, the positive guide device or the course of the groove in which a pin engages, or the cam disc, is designed in such a way that the clearance angle when pointed is always between 2 ° and 10 °, preferably essentially between 3 ° and 5 °, particularly preferably 3 °. The clearance angle is preferably kept constant during the ^'pointing of the pen. It is also preferred that the clearance angle is within an interval of 1 ° when sharpening.

The sharpener preferably has a sealing device. This sealing device seals the guideways in particular, so that the guiding behavior is not impaired by penetrating materials such as chips or the like.

The sealing washer is made in particular from a material which -pöM * and / or - 'polyamide-or -Derdn or HόstaföriϊV ^' - ^' Ε ^" ; -ge ^ - ^' -, where Derin and Hostaform are product names.

The sharpener has, in particular, a guideway which enables an elliptical pen with ellipse ratios of essentially 1.3: 1 to 1.6: 1 to be sharpened with a substantially constant clearance angle. The ellipse ratio of the pin is particularly preferably essentially 1.45: 1. Other ellipse ratios as well as other forms of the pin are also preferred according to the invention.

The sharpener preferably has a container which collects the chips that arise during the sharpening. Such a design, for example as a collecting hood or chip collecting hood, tes container essentially adjoins the cutting edge and is particularly transparent.

The guide disk is preferably guided between two flat surfaces, one of which. Prevent movement of the guide disc in the axial direction, i.e. perpendicular to the flat surface.

An opening in the outer wall of the housing, through which a pin is inserted into the housing for tipping, is preferably at least partially covered by a cover, which is in particular designed as a disk. This cover is spring-loaded against the housing from the inside of the housing. The cover has a through opening through which the pin and possibly part of a guide device for this pin extends. The through opening is dimensioned in such a way that the mounting device or the pin contacts the wall of this through opening. Thus, the housing in the area of the opening through which the pin is inserted at the peaks and in which it is moved perpendicularly to its longitudinal axis at the peaks in the ^{^'we'} seritlichen ^{'^{"äbgedeckt."}} ^*''The ^"cover is vertically thereby to The longitudinal axis of the pin is arranged to be movable with respect to the housing and is pressed by the spring in each of these possible relative positions * with respect to the housing against the housing.

The sharpener is preferably at least partially made of a high-quality plastic, such as POM. In particular, the guideway and / or the holding device and / or the guide pin and / or the container are made of a (high-quality) plastic.

The cutting device or the knife is preferably made of hardened steel. In particular, it is provided that the holding device has the guide sleeve. The holding device is particularly preferably the rotary insert, or vice versa.

In a preferred embodiment, the sharpener has a rotary insert which has a guide sleeve with a wall section which extends in the circumferential direction. This wall section delimits a cavity in which the pin can be received, in particular in a form-fitting manner, during the point. In this preferred embodiment, the rotary insert also has a support section, via which this rotary insert can be supported in the axial direction.

The support section is preferably designed such that it extends in the radial direction.

The guide sleeve preferably has a varying wall thickness in the circumferential direction. The wall thickness of the guide sleeve is particularly preferably essentially constant in the axial direction.

The lau- - the wall thickness - the guide sleeve - n - circumferential direction - preferably affects the shape of the pin to be sharpened.

The support section is particularly preferably arranged axially at the end of the guide sleeve. The support section is preferably supported on a housing section, in particular in the axial direction. The support section is preferably supported in the axial direction on a substantially radially extending housing wall section.

A housing insert is preferably provided, which is particularly preferably designed in several parts, for example in two parts. The housing insert can be designed in such a way that it has a division plane which is oriented essentially perpendicular to the longitudinal axis. In a preferred design, at least three cam guide surfaces arranged on or in the housing insert.

In particular, it can be provided that the housing insert is designed in two parts. and at least one cam guide surface is arranged on each of these parts on the side facing the housing interior.

It is further preferred that the housing insert has a radially extending wall section axially on both sides, each of which is provided with a through opening. The guide sleeve can extend through this through opening. At least one boundary wall of these through openings acts particularly preferably as a cam guide surface.

Three cam disks, which are axially adjacent, are particularly preferably provided.

Preferably, at least one cam disk or one cam disk set has -e-ine-Θffnu-ng-'? -which in ^" spiel-swei" se ^"" ei ^" ne ^"" is a through opening and extends radially inward in the axial direction. The guide sleeve can be inserted through this opening. This opening is preferably designed in such a way that the guide sleeve in it is form-fitting , in particular rotatably, can be recorded.

At least three cams are preferably connected to one another in one piece.

It is also particularly preferred that at least three cams are integrally connected to the guide sleeve. The housing is preferably sealed, in particular at the end. For this purpose, one or more seals can be provided.

In a preferred embodiment, at least two cam disk guides are arranged at an angle of 120 ° to one another.

It is further preferred that at least two cam disk guides are arranged at an angle of 60 ° to one another. The cam disk guides are preferably flat, at least two cam disk guides being provided, the normals of which enclose an angle of 120 °.

The invention is explained in more detail below with reference to the figures, which are not intended to restrict the invention.

It shows:

Figure 1 shows a first exemplary embodiment of the invention in a schematic, partially sectioned view.

FIG. 2 shows a first sectional view of the representation according to FIG. 1;

3 shows a second sectional view of the representation according to FIG. 1 ;

Fig. 4 shows the position of the knife edge in a first position of the pencil.

5 shows the position of the knife edge in a second position of the pin;

6 shows the position of the knife edge in a third position of the pin; 7 shows the position of the knife edge in a fourth position of the pin;

8 shows a second exemplary embodiment of the invention in a schematic, partially sectioned view;

Fig. 9 is a sectional view taken along line 9-9 of Fig. 8;

FIG. 10 shows a side view from the direction of arrow 126 from FIG. 8; and

Fig. 11 is a sectional view taken along the line 11-11 of Fig. 10;

12 shows an exemplary embodiment according to the invention in a schematic representation;

Fig. 13 is a sectional view as seen from line 13-13 in Fig. 12;

Fig. 14 is a sectional view as seen from line 14-14 in Fig. 12;

Fig. 15 is a sectional view as seen from line 15-15 in Fig. 12;

Fig. 16 is a sectional view as seen from line 16-16 in Fig. 12;

Fig. 17 is a sectional view as seen from line 17-17 in Fig. 12;

18 shows an exemplary embodiment according to the invention in a schematic representation; Fig. 19 is a sectional view as seen from line 19-19 in Fig. 18;

Fig. 20 is a sectional view seen from line 20-20 in Fig. 18;

Fig. 21 is a sectional view seen from the line 21-21 in Fig. 18;

Fig. 22 is a sectional view as seen from line 22-22 in Fig. 18;

23 shows an exemplary embodiment according to the invention in a schematic representation;

Fig. 24 is a sectional view seen from line 24-24 in Fig. 23;

Fig. 25 is a sectional view as seen from line 25-25 in Fig. 23;

Fig. 26 is a sectional view as seen from line 26-26 in Fig. 23;

Fig. 27 is a sectional view as seen from line 27-27 in Fig. 23;

28 shows an exemplary embodiment according to the invention in a schematic representation;

Fig. 29 is a sectional view as seen from line 29-29 in Fig. 28;

Fig. 30 is a sectional view as seen from line 30-30 in Fig. 28; Fig. 31 is a sectional view as seen from line 31-31 in Fig. 28;

Fig. 32 is a sectional view as seen from line 32-32 in Fig. 28;

33 shows an exemplary embodiment according to the invention in a schematic illustration in a partially sectioned view; and

34 shows an exemplary embodiment according to the invention in a schematic illustration of a partially sectioned view;

1 shows an exemplary embodiment of the pencil sharpener 1 according to the invention, which is intended to provide essentially elliptical cosmetic pencils with an essentially chisel-shaped tip.

The sharpener has a housing which is identified overall by the reference number 10. The case has a weave-like look. cylindrical section 10a, which is partially covered by an annular plate 10b.

A substantially conical taper 10c is formed on this annular plate 10b, to which a hardened knife edge 12 made of hardened steel is fastened by means of a screw 11.

The knife edge is designed in a conventional manner, which means that it is essentially designed as a flat plate which has a cutting edge 12b and a tip 12c on the surface facing the edge (FIG. 4).

The inner cylindrical space 10d of the housing 10 is closed with a housing cover 13 which is essentially annular. is formed "and is attached to the housing 10 with screws 13a which engage in threaded holes 10e in the housing.

It should be noted that instead of this screw fastening, another connection can be made between the housing cover and the housing.

Arranged within the housing is a holding device, which is designated overall by 14.

The holding device 14 consists of a first, the contour of the matched pencil to be sharpened tubular holding portion 14a and a substantially disk-like portion 14b, the upstream ^'are preferably connected integrally to one another.

The holding device 14 is received in the cylindrical cavity 10a of the housing 10 in such a way that the holding device can rotate relative to the housing.

In addition-ϊ-ist -.- de housing cover..10. _; . Provided with a bore, 13h ....... which is designed so that it enables an undisturbed rotation of the tubular extension 14a.

As already stated, the tubular extension 14a is designed in such a way that at least the inner contour of the outer contour of a pin 16 with a longitudinal axis 18 is adapted.

The disk-shaped part 14b of the holding device has a first end face 22 and a second end face 24. A first groove 26 is provided in the first end face 22 and a second groove 28 in the second end face 24. A first pin 30, which is held firmly in the housing 10, engages in the groove 26 and a pin 32, which is firmly held in the housing cover 13, engages in the second groove 28. The dimensions of the first and second grooves 26, 28 and the first 30 and the second pin 32 are selected so that the pins can slide in the grooves.

A sealing disk 34 is also provided, which preferably consists of a plastic and is provided between the disk-shaped part 14b and the cover 13. This groove serves for sealing and also facilitates the movement of the annular part 14b.

On the disk-shaped extension 10b, as can be clearly seen in FIG. 1, an essentially conical, cup-shaped container 36 is provided, which is placed on an extension 10g of the circular disk-shaped part 10b. This container is preferably made of plastic, particularly preferably of ^' transparent plastic.

FIG. 2 shows a partially sectioned view along the line 2-2 in FIG. 1. Here the shape of the groove 28 can be clearly seen.

3 shows a further sectional view, from which the shape of the groove 26 emerges. The shape of the groove or the grooves is determined in particular by a back calculation from the desired rolling movement during the point.

As can be seen in FIG. 3, the first groove 26 is essentially elliptical, the elliptical configuration essentially corresponding to the elliptical configuration of the corresponding opening of the tubular extension 14a of the holding device. In other words, ^" the curved path 26 is essentially elliptical-concentric to the elliptical contour of the pin 16. As can be seen in FIG. 2, the second groove is also essentially approximately elliptical, but, roughly speaking, the ellipse here is tilted at an angle of 45 °. One could also speak of a distorted ellipse.

The function of the sharpener according to the invention will now be described with reference to FIGS. 4 to 7:

Since the circular disc-shaped extension 14b of the holding device 14 is held between the disc-shaped extension 10b of the housing and the housing cover 13, it cannot move in one direction along the axis 18 of the pin. With respect to the housing 10, therefore, the disc-shaped extension 14b executes a flat movement. As is known, the movement of a body can be represented as the sum of a translational movement with a rotational movement about the respective current axis of rotation. In the case of a planar movement, as in the present case, this results in a total of three degrees of freedom, namely two possibilities of movement in the X and Y planes (which are not shown and which would extend here perpendicular to the axis 18), and a rotational movement.

Since the two guide pins 30 and 32 firmly locked in the housing. kert and the two guide grooves 26 and 28 are in turn arranged in a circular extension 14b, there are two fixed points for the movement of the disk-shaped part 14b with respect to the housing 10, so that only one degree of freedom remains.

This means that a rotation of the pin 16 leads to an exactly predetermined movement of the holding device 14 with respect to the housing 10 and thus also with respect to the knife edge 12 firmly connected thereto. Figures 4 to 7 show how this movement is designed.

The knife 12 is arranged such that it lies with a clearance angle 40 on the tip of the pin to be shaped. When the pin 16 is rotated, as shown in FIGS. 4 to 7, the pin 16 is moved up and down or along the arrow direction 52 in such a way that this clearance angle is maintained in all positions of the pin.

On the one hand, this ensures that the tip of the pin achieves exactly the predetermined shape, in the present case a chisel-shaped tip.

Furthermore, the constant clearance angle ensures that the cutting result is uniform and that no pressure is exerted vertically on the pin (as viewed in the direction of the illustration in FIGS. 4 to 7) during the cutting.

In this way, an exact, positive control of the position of the pin with respect to the knife edge is achieved in a technically simple manner.

It is noted that the chisel-shaped tip on an elliptical pen is the preferred application of the present invention. However, the solution according to the invention makes it possible to implement a wide variety of shapes which can be achieved by the linear superimposition of two curved paths at two fixed points, that is to say the pins.

Fig. 8 shows a second exemplary embodiment of the invention in a schematic representation. The sharpener 1 ^comprises' a housing 10 to which is attached removably a lid 60th The housing 10 has a thin-walled outer wall 62. A first intermediate part 64 and a second intermediate part 66 are arranged within the thin-walled outer wall 62 within the housing .10.

The first 64 and the second intermediate part 66 each have an essentially flat region 68, 70 which extends essentially perpendicular to the longitudinal axis 72 of a channel 74, which is arranged within the holding device 14 and serves to receive a pin 16 to be sharpened.

The first 64 and the second intermediate part 66 are accommodated in the housing in a rotationally fixed manner with respect to the longitudinal axis 72. The first 42 and the second intermediate part 66 each have a flange 76, 78 which extends in the outer region 80, 82 from a plate 80, 86 having the flat region 68 and 70, respectively, perpendicular to the flat region 68, 70. With their respective outer surfaces 88, 90 facing away from the longitudinal axis 72, the circumferential flanges 76, 78 bear against the outer wall 62. To ^"the ^plate" 86 ^'abgewaήdte ^"~ end ^{face"^"92'} of the ^{^} ^zwelten" intermediate part 96 abuts against the first intermediate part 64 from. The plate 84 of the first intermediate part 64 and the plate- 86 of the second intermediate part 66 each have a has an essentially circular opening 94, 96. In the area of the opening 94 of the first intermediate part 96, an extension 98 with a cylindrical part 100 and a conical part 102 formed thereon extends from the plate 84 in the direction facing away from the second intermediate part 66 the cylindrical part 100 and the conical part 102 are each hollow.

At the end facing away from the second intermediate part 66, the conical part 102 has an opening 104, which the inside of the conical part 102 connects to the interior of the cover 60. A knife edge 12 is mounted on the shoulder 98 by means of a screw 11 at an angle to the longitudinal axis 72.

Between the first intermediate part 64 and the second intermediate part 66, a cam disk 20 extends parallel to the flat regions 68, 66, which contacts the first 64 and the second intermediate part .66 and is rotatable with respect to the longitudinal axis 72 relative to the first intermediate part 64 and the second intermediate part 66 is arranged. The ^' cam 20 has on its two end faces 22, 24, which contact the first intermediate part 64 and the second intermediate part 66, respectively circumferential grooves 26, 28, which are arranged asymmetrically with respect to a plane spanned by the cam 20. In these grooves 26, 28 each extend pins, which are fastened to the first intermediate part 64 or to the second intermediate part 66, so that the movement path which the cam 20 can execute with respect to the first intermediate part 64 and the second intermediate part 66 results from the interaction the pins with the grooves 26, 28 is determined. The cam disc 20 has a through opening 106. Of the cam 20 ^* is formed around these through-aperture on the side facing away from the first intermediate portion 64 side, a tubular extension 14a arrival, which extends through the opening 96 of the plate 86 of the second intermediate part 66th

The plate 86 of the second intermediate part 66 also has, on its side facing away from the first intermediate part 64, a flange 108 which extends perpendicularly to the planar region 68 and is designed in particular all around, and for supporting the spring element 110 which is in particular designed as a spiral spring and is supported against the second intermediate part 66, serves. With its second end 112, the field element 110 is supported against a disk 114 with a circumferential flange 116 from. This disc 114 ^' has a through opening 118 adapted to the outer contour of the tubular extension 14a, through which this tubular extension 14a extends.

The disk 114 extends essentially perpendicular to the longitudinal axis 72 and is supported with its end face facing away from the field element 110 against the housing 10. For this purpose, the housing 10 has in particular a tubular extension 122 which extends around the longitudinal axis 22. In this way, the disk covers an opening 124 which extends in the outer wall 62 of the housing 10 and has an opening area which is larger than the area defined by the outer circumference of the tubular extension 14a.

FIG. 9 shows a sectional illustration along the line 9-9 from FIG. 8.

FIG. 10 shows a side view from the direction of arrow 126 from FIG. 8th.

I -Fig. 10 - is particularly clarified -, - that the disc 114 is arranged in the direction perpendicular to the longitudinal axis 72 in relation to the housing 10 or the tubular extension 122 of the Ge _r housing 10 is arranged. The respective position of the disc 114 relative to the housing 10 is determined in particular by the relative position of the pin 16 or the tubular extension 14a or the cam disc 20 relative to the housing 10. The disc 114 pressed against the housing 10 under the action of the field element 110 follows the plane perpendicular to the longitudinal axis 72, in particular the movement of the tubular extension 14a, since its through-hole lies against the tubular extension from the outside. The field element 110 prevents the disk 114 from falling off the housing 10 and enables other on the one hand, a flexible mobility of the disk 114 corresponding to the mobility of the tubular extension 14a.

FIG. 11 shows a sectional view along the line 11-11 from FIG. 10.

12 shows an exemplary embodiment of a sharpener according to the invention.

The sharpener 100 has a cap 102, a housing 103, a housing insert 108 and a rotary insert 110.

Furthermore, a pin 116 with a longitudinal axis 118 is shown in FIG. 12, which extends into the sharpener 100. This pin 116 is not part of the sharpener 100 itself.

The housing 103 is designed in several pieces and has a first housing part 104 and a second housing part 106.

The first housing part 104 is inserted into the second housing part 106 and is supported with the outer surface 2QQ of its first wall section 202 on the inner surface 204 of the second housing part 106.

A second cam disk guide 122b is provided on the radially inwardly directed inner surface 206 of the first wall section 202, which can cooperate with a second cam disk 120b.

A second wall section 208 is arranged radially inside the first wall section 202, on which a first cam disk guide 122a is provided, on the radially inner surface 210, which can cooperate with a first cam disk 120a. The first 202 and the ^' second wall section 208 are connected via a third wall section 212 of the first housing part 104, which extends essentially radially inward, has a projection 2-14 on which the cap 102 can be supported,. and has a through opening 218 at its radially inner end 216.

A fourth wall section 220 is integrally formed on the third wall section 212, essentially in the area of the passage opening 218, which tapers in the direction facing away from this third wall section 212 and in the interior 221 of which the tip 222 of the pin 116 is received to tip.

A knife edge 112 extends through a — preferably slot-like — through opening — of the fourth wall section 220 and is detachably fastened to the fourth wall section 220 by means of a screw 111.

The second housing part 106 is essentially cup-shaped and has a housing cover ^" 160 ^" , ^" which is ^" preferably ^" -ei ^", essentially an elliptical wall area, and a side cover wall 224, which is integrally formed on the housing cover 160 and extends essentially radially inwards. This cover wall 224 has a through opening 226 through which the pin 116 can be inserted into the housing interior 228.

From this cover wall 224, a fifth 230 and a sixth wall section 232 near the through-opening 226 extend into the housing interior 228, the ^" radially inner inner surfaces 234, 236 of which extend essentially parallel to the longitudinal axis 118 of the guide sleeve 114. The eighth cam disk guide 122h is arranged on the inner surface 234 and interacts with the eighth cam disk 120h.

The seventh cam disk guide 122g is arranged on the inner surface 236 and cooperates with the seventh cam disk 120g.

The housing insert 108, which can in principle be designed in one or more pieces, is designed in two pieces in the design according to FIG. 8 and is inserted into the housing 103 with a slight press fit. The parting plane of the two parts of this housing insert 108 runs essentially through a central longitudinal axis 119 of the housing 103, it being provided in particular that these parts of the housing insert 108 are arranged essentially mirror-symmetrically to this parting plane. The two parts of the housing insert 108 are supported against one another in the circumferential direction.

The two parts of the housing insert 108, correspondingly placed one against the other, can fundamentally form an ^“ essentially” closed outer surface or a non-closed, at least not completely closed, outer surface.

In the design according to FIG. 12, the two parts of the housing insert 108, correspondingly placed one against the other, form a substantially non-closed or incompletely closed lateral surface. This is realized in the design according to FIG. 12 in such a way that these two parts of the housing insert 108 each have a substantially closed coherent wall section which forms a breakthrough-free jacket section which extends in the circumferential direction essentially parallel to the longitudinal axis 118 of the housing insert 108 and over a section in circumferential direction. This respective coherent and breakthrough-free jacket section of the two parts of the housing insert 108 is followed by tab-like extensions which extend in the circumferential direction.

In the area of these tab-like extensions, the outer surface of the housing insert 108 does not extend in the direction of the longitudinal axis of this housing insert 108 over the entire length of this insert 108. The tabs of the different parts of the housing insert 108 are supported against one another in the circumferential direction. In the area of these tabs of the different parts of the housing insert 108, the outer circumferential dimension compared to the inner circumferential dimension of the housing shell 160 is designed such that a slight interference fit is brought about when the housing insert 108 is inserted into the housing 103.

Housing insert 108 has a third cam guide 122c, which interacts with a third cam 120c, a fourth cam guide 122d, which interacts with a fourth cam 12Od, a fifth cam guide 12 ^" 2e""" di ^: e "- 'with ^~" 'e-fifth "' cam 12O ^' cooperates, and a sixth cam guide 122f, which cooperates with a sixth cam 120f.

The rotary insert 110 furthermore has a guide sleeve 114 with a non-rotationally symmetrical, in particular elliptically shaped, jacket-like wall area 238, with which the third 120c, fourth 120d, fifth 120e and sixth 120f cam disc is connected in one piece.

Cam disks 120a, 120b, 120c, 120d, 120e, 120f, 120g, 120h are arranged on the outer surface of this rotary insert 110. The first 120a and the eighth cam plate 120h are each formed by a section of the radially outer outer surface 240 of the jacket-like wall region 238 of the guide sleeve 114. The disk-shaped cam disks 120b, 120c, 120d, 120e, 120f, 120g also extend from this outer surface 240 of the jacket-like wall region 238 in the radial direction, which, as indicated by way of example by the reference symbol, may have cutouts 123. , The thickness of these disks is preferably between 1 mm and 10 mm, and particularly preferably essentially 3 mm. But other dimensions are preferred.

The first 120a, the second 120b, the third 120c and the fourth cam disk 12Od are assigned to a first group 242 and the fourth 120e, the fifth 120f, the sixth 120g and the seventh cam disk 120h are assigned to a second group 244.

The cam disks 120a, 120b, 120c, 120d of the first group 242 are, in this order, axially offset and arranged adjacent to one another, with ^" adjacent" cam disks 120a, ^" in ^" the design ^" according to ^" FIG. 12 ^' - ^"" , 120b, 120c, 120d of the cam disks 120a, 120b, 120c, 120d of the first group 242 essentially abut one another in the axial direction.

The cam disks 12Oe, 120f, 120g, 120h of the second group 244 are, in this order, axially offset and arranged adjacent to one another, with - in the design according to FIG. 12 - two adjacent cam disks 12Oe, 12Of, 120g, 120h each of the cam disks 120e , 120f, 120g, 120h of the second group 244 essentially abut one another in the axial direction. The first group 242 is arranged at a distance from the second group 244 in the axial direction.

The first group 242 is arranged, essentially in the end region 246 of the guide sleeve 114, which faces the fourth wall section 220 of the first housing part 104, while the second group 244 essentially in the end region 248 of the guide sleeve facing away from the fourth wall section 220 of the first housing part 104 114 is arranged.

The cam disks 120a, 120b, 120c, 12Od of the first group 242 interact with the cam disk guides 122a, 122b, 122c, 122d assigned to them in such a way that in each case the position of the rotary insert 110 in the circumferential direction is defined in a substantially unambiguous and repeatable manner at each angle of rotation , •

In a corresponding manner, the cam disks 120e, 120f, 120g, 120h of the second group 244 interact with the cam disk guides 122e, 122f, 122g, 122h assigned to them.

It should be noted that instead of the two groups 242, 244, one group or more than two groups can also be given. Furthermore, the number of cam disks assigned to a group can also be selected differently in order to essentially uniquely determine a position at each rotation angle of the rotary insert 110. For example, three cam disks with correspondingly assigned cam disk guides can be provided. It is further preferred that adjacent cams of a group are - at least partially - spaced axially apart from one another. Furthermore, the order of the cams in the axial direction can be designed differently. In a preferred embodiment, the cam disks assigned to the same group 242, 244 differ in size.

The cam disks 120a, 120b, 120c, 120d assigned to the first group 242 are preferably arranged mirror-symmetrically to the cam disks 12Oe, 12Of, 120g, 120h assigned to the second group 244, with respect to a plane of symmetry that is oriented perpendicular to the longitudinal axis of the rotary insert 110. If appropriate, the entire rotary insert 110 is mirror-symmetrical with respect to this plane of symmetry.

The inner contour of the guide sleeve 114 is non-rotationally symmetrical, in particular elliptical, and is preferably adapted to the outer contour of the pin 116, which has an elliptical cross-sectional area perpendicular to its longitudinal axis.

The cap 102 can be detachably connected to the first housing part 104. The design of the cap 102 is cylindrical in the present application example. The cap 102 can be designed to be closed, facing away from it, and to catch chips that arise during the tip.

FIG. 13 shows the sharpener 100 from the perspective of line 13-13 in FIG. 12.

13 illustrates the elliptical design of the housing envelope 160, which delimits an elliptical interior 106a. Furthermore, the cylindrical design of the cap 102 can be seen in FIG. 13. The knife edge 112, which extends through the slot 112b provided in the fourth wall section 220 into the inner space 221 and is releasably fastened to the fourth wall section 220 by means of a screw 111, has a cutting edge 112a. 13 also illustrates the elliptical design of the opening section 104a facing the second housing part 106 of the passage opening 218 and the circular design of the opening cross section 104b facing away from the second housing part 106. Through opening 218.

FIG. 14 shows the sharpener 100 from the perspective of line 14-14 in FIG. 12.

The housing insert 108 is inserted into the housing sleeve 160 with a slight interference fit, the two parts of this housing insert 108 being supported on one another by tabs 250, 252, 254, 256 extending in the circumferential direction.

14 also shows the first cam guide 122a and the second cam guide 122a. The first guide surface 258a of the first cam disk guide 122a and the second guide surface 258b of the second cam disk guide 122b are each flat and axially offset from one another and arranged parallel to one another.

The first cam disk 120a makes contact with the first cam disk guide 122a in at least one rotational position, as shown in FIG. 14. The first cam disk 120a preferably contacts the first cam disk guide 122a in every rotational position.

FIG. 15 shows a view along lines 5-15 in FIG. 12.

The rotational position of the rotary insert 110 corresponds to that shown in FIG. 14 in the illustration according to FIG. 15.

15 is axially offset from that of FIG. 14. As can be seen from the regions 260 and 262 in FIG. 15, in the axial position shown there, the parts 264, 266 of the housing insert 108 are objected to in the circumferential direction. '

In at least one rotational position, in particular in all rotational positions, the second, elliptically designed cam disk 120b bears against the second cam disk guide 122b.

The first 120a and the second cam plate 120b are arranged with respect to one another such that their respective major axes 124a and 124b are perpendicular to one another.

15 also shows the third 122c and the fourth cam guide 122d, each of which extends inwards as a kind of intermediate wall from the outer wall 268 of the housing insert 108, in particular perpendicular to the longitudinal axis 118.

The third guide surface 258c of the third cam disk guide 122c and the fourth guide surface 258d of the fourth cam disk guide 122d are in each case "designed" and offset axially to one another and arranged parallel to one another.

The third 258c and the fourth guide surface 258d are further arranged perpendicular to the first 258a and the second guide surface 258b.

The third cam disk 120c bears against the third cam disk guide 122c at least in one rotational position, in particular in all rotational positions. The peripheral surface of the third cam disc has two curved regions which abut one another with their respective ends, so that two substantially tapering transition regions 270, 272 are formed between the curved regions. These tips 270, 272 face each other and are about 45 degrees from the big one The main axis 124a of the first cam plate 120a is rotated clockwise and about 45 degrees counterclockwise with respect to the major main axis 124d of the second cam plate 120b. The third cam plate 120c is designed in such a way that the curvature 123a extending to the main axis 124b of the second cam plate 120b is somewhat rounder than the curvature 123b which runs in the opposite direction. Furthermore, the third cam plate 120c is point-symmetrical in the view plane running perpendicular to the longitudinal axis 118.

FIG. 16 shows a view along the line 16-16 in FIG. 12.

In FIG. 16, the entire rotating insert 108 is rotated 90 degrees with respect to the position in FIGS. 14 and 15.

The fourth cam disk 12Od is in contact with the fourth cam disk guide 122d at least in one rotational position, in particular in all. The fourth cam 12Od is _. mirror-symmetrical to the third cam 120c with respect to the major axis 124b of the second cam 120b.

FIG. 17 shows a view along the line 17 - 17 in FIG. 12.

The third cam 120c is asymmetrical. The sections 125a to 125d of the cam disk guides 122a to 122h facing the cam disks 120a to 120h are essentially flat.

Due to the interaction of the cam disks 120a to 12Od with the cam disk guides 122a to 122d, the guide sleeve 114 is held in each rotational position in such a way that the tip of a pin received in the guide sleeve 114 is guided along the cutting edge 112a.

Here, the terms left, right, below and above should be understood as follows: In the sectional plane perpendicular to the central longitudinal axis 119, directions above and below are to be understood, which extend in a first direction. The left and right are to be understood as directions that extend in a second direction perpendicular to the first direction. The position of the knife edge 112 is defined as above. The first cam disk guide 122a prevents the rotary insert 110 from deflecting upwards by contact with the first cam disk 120a. As shown in FIG. 15, the second cam plate 120b, which is located axially next to the first cam plate 120a, represents an upward guide; that is, it prevents the rotary insert 110 from moving downward. 16 shows the third cam plate 120c and its cam plate guide 122c. It is prevented that the turning insert 110 moves to the left or that the turning insert 110 is guided to the right. FIG. 17 shows the fourth cam disk 12Od and the fourth cam disk guide 122d, which, in their interaction, enable guidance to the right. Seen from the first housing part 104, in the rear ^* part of the sharpener there is a corresponding arrangement of four cam disks 120a to h and their four cam disk guides 122g and 122h (two cam disk guides cannot be seen), which ensures an even smoother run; tilting in particular is prevented. The total of eight cam disks 120a to 120h and eight cam disk guides 122a to 122h thus make it possible for the rotary insert 110 to move up and down in the direction of arrow 150 and to the right and left in arrow direction 152 (FIG. 17), so that the pin in any angle of rotation abuts the cutting edge. The position of the rotary insert 110 is clearly defined by each angle of rotation.

In a preferred embodiment, the rotary insert 108 can only be axially displaced when the housing 103 is open, in a limited number of rotational positions, in particular for assembly. This can be one or two or three or four or more rotational positions, for example. In the remaining rotational positions, stops act in the axial direction, in particular in both orientations of the axial direction.

The stops can, for example, be designed in such a way that, if necessary, alternately, cam disks strike in the axial direction on adjacent cam disk guides under axial load.

18 shows a schematic representation of an exemplary embodiment of the invention.

The sharpener 100 has a housing 103 with a first housing part 104 and with a second housing part 1 ^; 06. • -

The second housing part 106 has a first housing wall; cut 400 and a second housing wall section 402, which is fixedly and integrally connected to the first housing wall section 400.

The first housing wall section 400 of the second housing part 106 is designed to be ring-elliptical and extends around a longitudinal axis 404 of the housing.

The second housing wall section 402 of the second housing part 106 extends essentially radially to the housing longitudinal axis 404. This second housing wall section 402 is designed as an elliptical plate and has an elliptical one Through opening 406. A, in particular circular, recess 408 extends around the through opening 406 on the side of the second housing wall section 402 facing the housing interior 228.

A, in particular disc-shaped, sealing element 410 is received in this depression. This sealing element 410 has a through opening 412. This has an elliptical cross-sectional area that is smaller than the elliptical cross-sectional area of the through opening 406, which is provided in the second housing wall section 402. The outer circumferential contour of the sealing element 410 can, for example, have a circular shape, the diameter of this circular shape being smaller than the diameter of the circular depression 408.

The first housing part 104 is designed in one piece and is connected fixedly or detachably to the second housing part 106.

The first housing part 104 has a disk-like region 414 which extends ^" substantially perpendicular to the longitudinal axis 404 of the housing. This disk-like region 414 has an outer circumferential contour radially on the outside, which is essentially matched to the inner circumferential contour of the first housing wall section 400 a through opening 416 is provided in the disk-like region 414.

An extension is provided on this disk-like area 414, which extends from this area 414 in the direction facing away from the housing interior 228 and receives the knife edge 112 by means of a screw 111.

On the disk-like area 414, two flanges 510, 512 are also provided, which extend from the radially outer section of the Reichs 414 protrude in the axial ^' direction and the housing interior 228. These flanges 510, 512 terminate radially on the outside with the disk-like region 414, are each designed as a ring ellipse section and are spaced apart from one another in the circumferential direction by spaces 417, 418.

The first housing part 104 is inserted axially into the second housing part 106.

Optionally, a cap or lid 102 is releasably attached to the housing 103 to a space 420 for collecting the. Creating chips. This cap 102 can, for example, have a shoulder 422 in its wall 424 and can be inserted with an area 426 adjoining this shoulder in or on the first housing wall section 400, in particular centered.

In the disk-like region 414 of the first housing part 104, an, in particular elliptical, through opening 428 is also provided, through which the pin 16 can extend to the knife edge ₁₁ 2 ′. - • - ■ ^• ■ • - • - ^• - ^• ->. -. -. ^{, , .} ,

In the housing interior 228 there is a rotary insert 110 which has a guide sleeve or bush 114 and a support section 430 which extends essentially radially to the longitudinal axis 404. This support section 430 is designed in such a way that it can absorb any tilting moments which occur around an axis the guide sleeve 114 act, which is directed perpendicular to the longitudinal axis 404 of the housing.

In the design according to FIG. 18, this support section 430 is designed as a disk with a round outer peripheral contour, which is arranged axially at the end on the guide sleeve 114 and is integrally connected to the latter. This disc can Support like area 414 of the first housing part 104 and / or on the housing insert 108. The through opening provided in this support section 430 corresponds - in particular also with regard to the contour - to the through opening 432 provided in the guide sleeve 114.

In the design according to FIG. 18, a cam disk arrangement 434 is also provided, which is designed as a one-piece cam disk insert 436 with three axially adjacent cam disks 438, 440, 442.

This cam disk insert 436 has a through opening 444, which is designed such that the outer surface 446 of the guide sleeve 114 can be received in a form-fitting manner, in particular essentially or almost free of play.

Each of the cams 438, 440, 442 interacts with a cam guide 448, 450, 452. Correspondingly, these cam disk guides 448, 450, 452, of which the cam disk guide 452 is shown in FIG. 18, are likewise axially offset and arranged adjacent to one another.

The third cam disk guide 452 is formed by the inner surface 454 of a through opening 456, which is provided in a first, radially extending wall section 458 of the housing insert 108.

A second, radially extending wall section 460 of the housing insert 108 is provided in the axial direction at a distance from this first radially extending wall section 458.

On each of the first 458 and the second radially extending wall section 460, a web 462, 464 protrudes is essentially straight and elongated. These webs 460, 462 serve as the first 448 or second cam disk guide 450 for the first 438 or second cam disk 440.

Arranged radially on the outside on one of the wall sections 458, 460 are two axially and circumferentially extending flanges or wall sections 492, 494, which are spaced apart in the circumferential direction and are therefore not shown in the sectional view according to FIG. 18.

In the second, radially extending wall section 460 of the housing insert 108, a through opening 466 is provided, through which the guide sleeve 114 extends.

The first 438 and the second cam disc 440 are arranged axially between the first 458 and the second, radially extending wall section 460 of the housing insert 108.

FIG. 19 shows a view along the line 19-19 from FIG. 18 with the cover 102... .. - -. - ^■ - .. _-

19, the first housing wall section 400 of the second housing part 106 can be seen.

In this first housing wall section 400, the second housing part 104 is inserted, on which an extension 480 is provided, which receives the knife edge 112 by means of a screw 111.

A section of the passage opening 428 of the first housing part 104 can also be seen.

FIG. 20 shows a sectional view along the line 20-20 from FIG. 18 in a representation rotated by 90 °. 20 shows the cam disk insert 436, which has the first cam disk 438 and the second cam disk 440. These cams 438, 440 are firmly connected to a sleeve 490, the surface of which forms the third cam 442 in an axially offset plane.

20, the guide sleeve 114 is also shown.

The cam disk insert 436 or the sleeve 490 of the cam disk insert 436 is arranged around this guide sleeve 114 in the circumferential direction and in a form-fitting manner.

20 also shows the first cam disk guide 448 designed as a web 462 and — indicated by dashed lines — the second cam disk guide 450 designed as a web 464.

Furthermore, FIG. 20 shows two wall sections 492, 494, which are arranged fixedly on the radial wall section 458 of the housing insert 108 and extend radially on the outside in the circumferential direction and axially, between which, viewed in the circumferential direction, gaps 496, 498-given ^' - ^' are; - '- ^• -.- ^■ - -

The first 438 and / or the second cam disc 440 can extend into these spaces 496, 498, with a corresponding rotational position.

FIG. 21 shows a sectional view of the design according to FIG. 18 along the line 21-21 in a representation rotated by 90 °.

FIG. 22 shows a sectional illustration of the design according to FIG. 18 along the line 22-22 in a representation rotated by 90 °.

22 also shows the flanges 510, 512 arranged on the disk-like region 414 of the first housing part 104. that protrude from the radially outer portion of the region 414 in the axial direction and the housing interior 228 facing. The circumferential gaps 416, 418 between these flanges 510, 512 are also shown.

22 also shows the support section 430, which is designed here as a disk, and the passage opening 432 which extends through this support section 430 or the guide sleeve 114.

Line 514 indicates the passage opening 428 of the first housing part 104, which in the sectional view according to FIG. 22 is partially covered by the support section 430.

The lines 430 'and 432' indicate the position of the support section 430 or the through opening 432, which is present when a pin or the guide sleeve 114 is rotated 90 degrees with respect to the above-described position according to FIG. As can be seen from these different positions of the support section, the latter extends temporarily into the interstices 416, 418, in particular alternately.

23 shows an exemplary embodiment according to the invention in a schematic illustration.

The sharpener 100 according to FIG. 23 differs from the exemplary embodiment according to FIG. 18 in particular in the design of the rotary insert 110 and the design of the cam disk arrangement 434.

The rotary insert 110 is connected in one piece to the cam disk arrangement 434 in the exemplary embodiment according to FIG. 23. 23 does not have the disk described with reference to FIG. 18 430, which is arranged in the design there between the housing insert 108 and the disk-like region of the housing insert 104.

In the design according to FIG. 23, a further sealing device or sealing disk 530 is provided instead at said location. The sealing devices 410 and 530 are - seen in the axial direction - arranged on different sides of the housing insert 108. The sealing device or sealing disk 530 has a through opening 532 radially on the inside, through which the guide sleeve 114 of the rotary insert 110 extends.

23 is such that the first 438 and the second cam disc 440 are arranged on the two axial sides of a radially extending disc 534, which from the radial outside of the respective cam disc guides 448 and 450 can be contacted.

In the radial direction there is a space-free space 536 or 538 between the first 438 or the second body 440 'and the guide sleeve 114.

Furthermore, in the design according to FIG. 23, flanges 540, 542 which extend in sections in the circumferential direction are provided at the radially outer end of the disk 534 and each extend, for example, along a section of a circular path and are spaced in the circumferential direction by spaces 544, 546.

23, the ^" third cam 442 is formed by a surface area of the guide sleeve 114. 24 shows a sectional illustration of the design according to FIG. 23 along the line 24-24 in a representation rotated by 90 ° with the cover 102 removed.

25 shows a sectional illustration of the design according to FIG. 23 along the line 25-25 in a representation rotated by 90 °.

25 that the guide sleeve 114 of the rotary insert 110 is connected in one piece to the first cam plate 438.

25 also shows a first cam disk guide 448, which is rounded radially outward and radially inward. The first cam disk guide 448 plunges into the intermediate space 546 or, if appropriate, into the intermediate space 544, with the rotary insert 110 in a corresponding rotational position.

FIG. 26 shows a sectional illustration of the design according to FIG. 23 along the line 26-26 in a representation rotated by 90 °. ""'"' ^. - ^.. -. ^.. - ^. - ^.

Fig. 26 shows that the guide sleeve 114 of the rotary insert 110 is integrally connected to the second cam 440.

Furthermore, the second cam disk guide 450 according to FIG. 26 is designed in the way that was explained with reference to FIG. 25 with respect to the first cam disk guide 448.

FIG. 27 shows a sectional illustration of the design according to FIG. 23 along the line 27-27 in a representation rotated by 90 °. FIG. 27 shows in particular that the third cam plate 442 is formed by a region of the guide sleeve 114 or a region of the outer surface of the guide sleeve 114.

28 to 32 show different views or sectional views of an exemplary design according to the invention, which is similar to the design explained with reference to FIGS. 18 to 22.

28 to 32, on the one hand, and according to FIGS. 18 to 22, on the other hand, differ in addition to the geometry, such as in particular the geometry of the cam disks 438, 440, 442, in particular by the relative arrangement of the first cam disk guide 448 compared to the second cam disk guide 450th

While these cam guides 448, 450 and whose normals to include in the design according to Fig. 18 to 22 form an angle of approximately 145 degrees, this angle is in the embodiment according to '28 ^'32 120 degrees. In this Zusammenhang- ^•• al ^¬ lerdings should be noted that other angular relationships are inventively preferred.

33 and 34 each show a partially sectioned, exemplary embodiment according to the invention in a schematic representation.

33 and 34, it will be shown by way of example how the shape of the tip 560 can be influenced.

33 and 34 each show on the one hand a cross section through a guide sleeve 114 and a section of this respective guide sleeve 114 with a section of a pin 562 arranged therein. In the design according to FIG. 33, the guide sleeve 114 has a non-constant wall thickness in the circumferential direction. In this exemplary design, the smallest wall thickness 564 is given in the area of the small main axis of the ring-elliptical cross-sectional shape and the thickest wall thickness 566 in the area of the large main axis.

By means of this guide sleeve 114, a relatively flat tip 560 of the pin 562 to be tipped can be produced in comparison to the design according to FIG. 34.

34, the wall thickness of the guide sleeve 114 is constant in the circumferential direction.

33 and 34 can be used in particular in the designs according to FIGS. 18 to 32.

Claims

claims

1. Sharpener for pens (16), in particular for pens (16) with a rotationally asymmetrical lead or for pens (16), the lead of which is arranged within a mine carrier, the cross-sectional area of which is perpendicular to the longitudinal axis and is non-hexagonal and non-circular is with

- at least one housing (10);

- A cutting device which is connected to this housing;

- A holding device for the pin (16) which is at least partially received in the housing; and

- A positive guidance device which guides the holding device along a predetermined movement path in this housing.

2 ^' . Sharpener according to Claim 1, characterized in that this positive guidance has at least one guide element and at least one guide path, in which this guide element engages.

3. Sharpener according to claim 2, characterized in that the guide element is a guide pin.

4. Sharpener according to one of the preceding claims, characterized in that the guideway is a groove.

5. Sharpener according to one of the preceding claims, characterized in that the shape of the guideway is substantially the same as the outer contour of the cross-sectional area of the cutting surface which the cutting device produces on the pin (16).

6. Sharpener according to one of the preceding claims, characterized by a guide disk which extends radially outward from the holding device and has at least one groove for receiving a guide element which is fixedly arranged relative to the housing (10).

7. Sharpener according to one of the preceding claims, characterized in that the cutting device is fixedly arranged relative to the housing (10).

8. Sharpener according to one of the preceding claims, characterized in that the pin (16) is rotatably received in the holding device with respect to this holding device

"- ^'■" ^• is and ^Hai' teeinrlchtung compared to the "" Schrieldein- "^'is arranged movably ^■.

9. Sharpener according to one of the preceding claims, characterized in that the pin (16) is received axially displaceably in the holding device in the direction of the longitudinal axis of the pin.

10. Sharpener according to one of the preceding claims, characterized in that the pin (16) is guided relative to the cutting device by means of the positive guide device during sharpening such that the clearance angle is between 2 ° and 10 °.

11. Sharpener according to one of the preceding claims, characterized in that the clearance angle when the pin (16) is pointed is substantially constant.

12. Sharpener according to one of the preceding claims, characterized by at least one sealing device for sealing the guideways.

13. Pencil sharpener according to one of the preceding claims, characterized in that the pencil sharpener (1) is at least partially made of plastic.

14. Sharpener according to one of the preceding claims, characterized by at least one container for receiving chips.

15. Sharpener according to one of the preceding claims, characterized in that non-rotationally symmetrical cut surfaces can be produced by means of this sharpener.

16.-. Sharpener after-. orange claims, characterized in that the guide disc is guided between two flat surfaces, these flat surfaces preventing movement of the guide plate in the axial direction.

17. Sharpener according to one of the preceding claims, characterized by a cover device (114) for at least partially covering an opening in the housing (10) through which the pin (16) can be inserted into the interior of the housing, this cover being spring-loaded on the housing ( 10) is present.

18. Sharpener according to one of the preceding claims, characterized in that a rotary insert (110) is at least partially in a housing (106) and there moves upon rotation ^'around the longitudinal axis along a predetermined path.

19. Sharpener according to one of the preceding claims, characterized in that the rotary insert (110) has a guide sleeve (114) in which a pin (116) can move axially displaceably, a rotation of the pin (116) about its longitudinal axis ( 118) causes the rotating insert (110) to rotate with the guide sleeve (114).

20. Sharpener according to one of the preceding claims, characterized in that the rotary insert (110) has a guide sleeve (114) and cam disks (120a, 120b, 120c, 120d, 120e, 120f, 120g, 120h) firmly connected to this.

21. Sharpener according to one of the preceding claims, characterized in that the rotary insert (110) has at least three cams.

22 -; —- n sharpener according to one of the ^' orange ^' claims, -da- ^' ---- characterized in that in the interior (106a) of the housing (103) cam disk guides (122a, 122b, 122c, 122d, 122e, 122f, 122g, 122h) are provided, which interact with the cams (120a, 120b, 120c, 120d, 120e, 120f, 120g 120h).

23. Sharpener according to one of the preceding claims, characterized in that at least one of the cam disk guides (122a, 122b, 122c, 122d, 122e, 122f, 122g, 122h) has a section (125a,) facing the cam disk (120a) ^" to (120h) 125b, 125c, 125d) which extends essentially straight or flat.

24. Sharpener according to one of the preceding claims, characterized in that at least one of the cams (120a) to (120h) is formed by part of the outer surface (114b) of the guide sleeve (114).

25. Sharpener according to one of the preceding claims, characterized in that the cams (120a) to (120h) are designed elliptically or asymmetrically.

26. Sharpener according to one of the preceding claims, characterized in that at least three cam disks (120a) to (120h) and cam disk guides (122a) to (122h) face each other and essentially uniquely define the position of the rotary insert (110) at each angle of rotation ,

27. Sharpener according to one of the preceding claims, characterized in that the rotary insert (110) has at least two groups (242, 244) of cam disks (120a, 120b, 120c, 120d; 120e, 120f, 120g, 120h) which have an axial Distance from each other.

28. Sharpener according to one of the preceding claims, characterized in that the rotary insert (110) is axially displaceable at a maximum of three positions in the housing, the position being defined by an angular range which is preferably less than 10 degrees, or preferably less than 5 degrees, or is preferably less than 3 degrees, or preferably less than 2 degrees or preferably less than 1 degree.

29. Sharpener according to one of the preceding claims, characterized in that the pen tip upon rotation about the longitudinal axis (118) in each Rotary position is at the cutting edge (112a) of the knife edge (112).

30. Sharpener according to one of the preceding claims, characterized in that. that a rotary insert (110) is provided, which comprises a guide sleeve (114), in which the pin (562), in particular ^{formschlüss'} ig can be received, and a support portion (430), via which this rotary insert (110) in can support in the axial direction.

31. Sharpener according to one of the preceding claims, characterized in that the support section (430) as _. radially extending section is designed.

32. Sharpener according to one of the preceding claims, characterized in that the guide sleeve (114) has a non-constant wall thickness in the circumferential direction.

33. Pencil sharpener according to one of the preceding claims, characterized ^• - -marked that the course of the wall thickness -the -Führungshülse (114) influenced in circumferential direction the shape of the to be sharpened tip (560) of the pin (562) - * ^■ - ^•• ,

34. Sharpener according to one of the preceding claims, characterized in that the support section (430) is designed like a plate.

35. Sharpener according to one of the preceding claims, characterized in that the support section (430) is arranged axially at the end of the guide sleeve (114).

36. Sharpener according to one of the preceding claims, characterized in that the support section (430), in particular axially, is supported on a housing section, and in particular on an essentially radially extending housing wall section.

37. Pencil sharpener according to one of the preceding claims, characterized in that a housing insert (108) is provided.

38 .. Sharpener according to one of the preceding claims, characterized in that the housing insert (108) is designed in several parts, in particular in two parts.

39. Sharpener according to one of the preceding claims, characterized in that the housing insert (108) has a parting plane which is oriented essentially perpendicular to the longitudinal axis.

40. Sharpener according to one of the preceding claims, characterized in that at least three cam guide surfaces (448, 450, 452) are arranged on or in the housing insert (108).

41. Sharpener according to one of the preceding claims, characterized in that at least two cams (438, 440, 442) are arranged within the housing insert (108).

42. Sharpener according to one of the preceding claims, characterized in that at least one cam (438, 440, 442) is supported axially on the housing insert (108), in particular on the inside of the housing insert (108).

43. Sharpener according to one of the preceding claims, characterized in that at least in the housing insert (108) two cam guides (448, 450, 452) are provided.

44. Sharpener according to one of the preceding claims, characterized in that the housing insert (108) axially on both sides has a substantially radially extending wall (458, 460), each with an, in particular elliptical, through opening (466) and through which the guide sleeve (114) extends.

45. Sharpener according to one of the preceding claims, characterized in that the support section (430), in particular axially, is supported on a radially extending wall (458, 460) of the housing insert (108)

46. Sharpener according to one of the preceding claims, characterized in that a wall of a through opening (456) which is provided in a radially extending wall (458) of the housing insert (108) is a guide surface ^" .

47. Sharpener according to one of the preceding claims, characterized in that at least one cam disk (438, 440, 442), and in particular a cam disk set (434), such as a one-piece cam disk set (434) with a plurality of cam disks (438, 440, 442), has an axially extending opening radially on the inside, and this cam plate (438, 440, 442) or this cam plate set (434) with this opening is placed on the guide sleeve (114).

48. Sharpener according to one of the preceding claims, characterized in that at least three cams (438, 440, 442) are integrally connected to the guide sleeve (114).

49. Pencil sharpener according to one of the preceding claims, characterized in that the housing (103) is sealed, in particular at the ends or on both sides.

50. Sharpener according to one of the preceding claims, characterized in that at least two cam guides (448, 450, 452) are arranged at an angle of 120 degrees to one another.

reference numeral

Sharpener housing a cylindrical cavity of the housing 10 b annular plate c taper d inner cylindrical space e threaded holes g attachment of the circular disk-shaped part 10b screw knife edge b cutting edge c tip of the knife edge housing cover a screw b bore knife edge holding device a tubular attachment b disk-like part pin ^• Longitudinal axis - ' Cam disc first end face second end face first groove second groove first pin second pin sealing washer container clearance angle direction of movement up and down direction of movement back and forth cover outer wall first intermediate part second intermediate part flat area of 64 flat area of 66 longitudinal axis channel flange flange outer area of 84 outer area of 86 plate of 64 plate of 66 outer surface outer surface end face opening in 84 opening in 86 extension of 84 cylindrical part of 98 conical part of 98 opening, in 102 through opening flange field element end of 110 washer flange through opening face of 114 tubular extension opening sharpener cap housing first housing part a rear elliptical opening of the first housing part second housing part a inner elliptical space housing insert 110 turning insert

111 screw

112 knife edge 112a cutting edge 114 guide sleeve

114a inner elliptical space of the guide sleeve 114b outer surface of the guide sleeve 116 pin

118 longitudinal axis

119 central longitudinal axis 120a first cam disk 120b second cam disk 120c third cam disk 12Od fourth cam disk 12Oe fifth cam disk 12Of sixth cam disk 120g seventh cam disk 120h eighth cam disk

122a first cam guide

122b second cam guide

122c third cam guide

122d fourth cam guide

122e fifth cam guide

122f sixth cam guide

122g seventh cam guide

122h eighth cam guide

123a Course of the curve of the third cam clockwise away from the tip

123b Course of the curve curve of the third cam disc counterclockwise from the tip

Major axis of 124a of 120a

Major axis of 124b of 120b

125a first section of the cam guide facing the cam disk

125b second section of the cam disk guide facing the cam disk

125c third section of the cam guide facing the cam 125d fourth section of the cam guide facing the cam disc 150 direction of movement up and down 152 direction of movement to the left and right 160 housing casing

200 outer surface of wall section 202 202 first wall section of 104 204 inner surface of 106 206 inner surface of 202 208 second wall section of 104 210 inner surface of 208 212 third wall section of 104 214 protrusion

216 radially inner end of 212 218 through opening in 212 220 fourth wall section of 104

221 interior of 220

222 top of 116

224 side cover wall of 106 226 through opening in. 224

228 housing interior

230 fifth wall section

232 'sixth section of wall ^.. -_- ^{• "} - ^.

234 inner surfaces of 230 236 inner surfaces of 232

238 jacket-like wall area of 114

240 outer surface of 238 242 first group

244 second group

246 end range of 114

248 end range of 114

250 tab of 108

252 tab of 108

254 tab of 108

256 _. , Tab of 108

258a first guide surface of 122a

258b first guide surface of 122b

258c first guide area of 122c 258d first guide area of 122d

260 area

262 area

264 part of 108

266 part of 108

268 outer wall of 108

270 tapered transition area ^'

272 tapered transition area

400 first housing wall section 400 of 106

402 second housing wall section of 106

404 housing longitudinal axis

406 through opening in 402

408 deepening in 402

410 sealing element

412 through opening in 410

414 disc-like area of 104

416 through opening

417 space

418 space

420 space to collect the chips

422 paragraph of 424

424 wall of 102

426 Area ^' on ^' 424 ^• - ^{~ ■}

428 through opening in 414

430 support section

432 through opening in 114

434 cam arrangement

436 cam disc units

438 cam disc

440 cam

442 cam

444 through opening in 434

446 outer surface of - 114

448 cam guide

450 cam guide

452 cam disk guide

454 inner surface

456 through opening in 454 458 first radial wall section of 108

460 second radial wall section of 108

462 footbridge

464 footbridge

466 passage opening in 460

480 continuation of 104

490 ^" sleeve by 436

492 axially and circumferentially extending wall section of 108

494 axially and circumferentially extending wall portion of 108

496 space

498 space

510 flange to 104

512 flange to 104

514 ^" line

530 sealing device or sealing washer

532 through opening in 530

534 disc from 434

536 material-free space

538 material-free space 540 flange on 534

^' 542- -Flansch- an 534 " ^■ - ^. - ^• - ^• - ^'

544 space

546 gap 560 tip of 562 562 pin

564 wall thickness of 114

566 wall thickness of 114