EP0216332B1 - Blade unit for a dry shaver - Google Patents
Blade unit for a dry shaver Download PDFInfo
- Publication number
- EP0216332B1 EP0216332B1 EP86112974A EP86112974A EP0216332B1 EP 0216332 B1 EP0216332 B1 EP 0216332B1 EP 86112974 A EP86112974 A EP 86112974A EP 86112974 A EP86112974 A EP 86112974A EP 0216332 B1 EP0216332 B1 EP 0216332B1
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- EP
- European Patent Office
- Prior art keywords
- cutter
- metallic core
- knife
- blades
- plastic
- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
- B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
- B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
- B26B19/044—Manufacture and assembly of cutter blocks
Definitions
- the invention relates to a knife block for dry shavers with circular blades arranged transversely to its longitudinal axis on a support.
- a hollow cylinder is provided as a carrier for the ring-shaped knife blades, which are embedded at the same distance from one another in the hollow cylinder made of plastic or metal, for example aluminum.
- One axial collar on each end of the hollow cylinder is used to insert the knife block thus formed into circular recesses of a coupling bridge connected to the drive of the dry shaving apparatus and swinging back and forth in the longitudinal extension of the blade block (JP-G M 48-42301).
- a triangular collar or corresponding recesses are provided on the end face of the support body, which have the same recesses or projections on the the coupling block receiving the knife block interact (JP-GM 49-200).
- the design of the carrier has proven to be problematic, in particular in the case of smaller knife blocks whose diameters are in the range below 10 mm.
- the carrier In order to avoid bending the knife block under shaving pressure and to achieve the necessary embedding depth for the knife blades, which is essential for their stable attachment to the carrier, the carrier must be kept sufficiently thick on the one hand, but on the other hand, this measure, in particular with a Formation of metal, too heavy, so that the field of application of such knife blocks is limited.
- the object of the invention is now to provide a knife block of the type mentioned, which can be kept mechanically stable with low weight against deflection, in which a stable mounting of the knife blades with good heat dissipation is ensured and which is inexpensive to produce, in particular with small knife blade diameters .
- a cylindrical metal-plastic carrier which comprises a metallic core and a cylindrical plastic body which closely surrounds it and forms a compact unit therewith.
- Such a metal-plastic carrier for the circular knife blades of the knife block is characterized by good stability, because it forms an extremely rigid and distortion-free carrier unit due to the close material connection of its metallic core to the material of the plastic body applied by injection molding.
- the circular knife blades that are optimally anchored on this metal-plastic carrier have the same flexibility in every direction and shear quality at every point of their cutting edges due to their all-round fixing in the carrier material.
- these knife blades can be manufactured relatively easily by circular grinding. This round grinding also allows the production of knife blades of relatively small diameter, which allows the manufacture of such small knife blocks. Accordingly, the knife blocks according to the invention can be used to implement shaving systems of relatively small size, which are characterized by particularly good adaptation to the areas of the face of the shaving person designated as problem areas.
- the knife blades are anchored in the metallic core of the metal-plastic carrier by circumferential receiving means arranged at predetermined intervals from one another.
- the same success can be achieved if the knife blades with their assigned concentric inner edges are placed directly on the metallic core of the metal-plastic carrier and positioned thereon in a mold cavity used to manufacture the knife block before the core is encapsulated with the material forming the plastic body will.
- This arrangement also ensures a secure fixing and support of the knife blades on the metallic core of the metal-plastic carrier, whereby separate receptacles in the metallic core become unnecessary due to the lateral support of these blades by the material of the plastic body enveloping the core.
- the knife blades of the knife block in its metal-plastic carrier are preferably cloverleaf-like cutouts arranged symmetrically to their concentric inner edges immediately surrounding the metallic core, through which the liquid plastic material during the injection molding of the plastic body can pass through and fill the spaces separated by the knife blades to the desired thickness of the plastic body.
- the metallic core of the knife block can be designed differently. It is particularly advantageous with regard to its rotationally secure fixing in the plastic body enveloping it, if the metallic core of the knife block is designed as a cross-section profile bar with continuous longitudinal troughs, the webs of which correspond to the inner edges of the knife blades. Then in the mold nest here, too, the liquid material forming the plastic body - forming a positive connection with the profile rod - penetrate into the spaces between the knife blades via the longitudinal recesses.
- the metallic core of the knife block is formed from a tube, the jacket of which has ring-shaped receiving grooves, which are always arranged at equal intervals, for inserting and positioning the individual knife blades.
- the knife blades positioned in the tubular metal core by means of the receiving grooves assigned to its jacket have form-fitting recesses which are made of the material of the plastic body enveloping this tube in the mold cavity be penetrated.
- the metal-plastic carrier of the knife block by pressing the metallic core during the manufacturing process in the mold cavity after the injection molding process into the plastic body which has a concentric axial bore.
- Fig. 1 shows a general overview of the shaving head 1 of a dry shaver, which is equipped with a cylindrical knife block 2, the circular knife blades 3 cooperate with a shaving foil 4, which is held in a shaving head frame 5, which on a ledge of the housing 6 of the dry shaving apparatus is attachable.
- a swing armature motor (not shown) is accommodated, which drives a U-shaped coupling bridge 9 via a rocking lever 7, an elastic coupling 8, which receives the knife block 2.
- This is done here by a collar 10 formed on the end faces of the knife block 2 and which engages in one of the fork-shaped ends 11 of the coupling bridge 9.
- Knife block 2 thus fixed in coupling bridge 9 is pressed elastically by a compression spring 12 assigned to and acting on the elastic couplings 8 against the shaving foil 4 fixed in the shaving head frame 5, for example by means of snap fasteners.
- the knife block 2 comprises a metallic core 13 which is concentrically encased by a rotationally symmetrical body 14 made of plastic.
- the individual knife blades 3 are placed on this metal-plastic carrier 15 thus formed, in such a way that their concentric inner or hole edges 16 rest directly on the core 13.
- the inner edges 16 of the knife blades 3, as FIG. 3 shows more clearly, are assigned cloverleaf-shaped cutouts 17 through which the still liquid plastic forming the body 14 can flow during the manufacture of the knife block 2, thereby filling up the spaces between the knife blades 3 and making them firm Connection between the body 14 and the knife blades 3 is created by embedding, which on the other hand is supported directly on the metallic core 13.
- each individual knife blade 3 shows, in a plan view of the end face of the knife block 2, which is closed off by the knife blade 3, the integration of each individual knife blade 3 into the metal-plastic carrier 15 by embedding it in the plastic body 14 with the aid of the plastic material flowing through it during the manufacturing process cloverleaf-shaped cutouts 17 which directly adjoin the metallic core 13 of the carrier 15 - surround it symmetrically.
- the knife blades 3 also simultaneously embed the metallic carrier 13 in the plastic body 14 or enclose it firmly, for example by centering the same in a mold cavity used to manufacture the knife block 2.
- the cylindrical knife block 2 enables the optional use of different areas of its knife blades 3 for interaction with the shaving foil 4 of the dry shaving apparatus by rotating about its longitudinal axis y.
- the necessary conversion of the blade block 2 within the forks 11 of the coupling bridge 9 is facilitated by recessed grips 18 on the end faces of the metal-plastic carrier 15, which allow a secure grasping of the knife block to be converted or exchanged.
- the metal-plastic bodies 15 in the receiving area are formed on the circumference by the forks 11 of the coupling bridge 9, two mutually parallel centering surfaces 19, which with corresponding parallel guide surfaces Interact forks 11 for the knife block 2 and thus enable a quick and easy setting of the respective shear zone.
- FIG. 4 An alternative solution with regard to the manufacture and design of the cylindrical knife block is shown in FIG. 4.
- the metal art Fabric carrier 15 'of the knife block 2' made of a metal core 13 'formed as a profile bar and a cylindrical plastic body 14' closely connected to it.
- the individual knife blades 3 are placed on the metal-plastic carrier 15 'designed in this way, the inner or hole edges 16 of which rest on the webs 20 of the profiled metallic core 13' and are supported there.
- the invention of the cylindrical blade block 2 'thus constructed also takes place in the injection molding process, with the metallic core 13' designed as a profile bar being centered in a mold cavity, whereupon during the injection molding process the plastic forming the plastic body 14 'through the longitudinal troughs 21 of the metal core 13 with a triangular cross section here 'flows, whereby, as in the example described above, an intimate connection of the same is achieved with the plastic body 14' surrounding it on all sides and with the knife blades 3 located directly on the core 13.
- the knife blades 3 center themselves on the profiled core 13 'of the metal-plastic carrier 15'.
- FIG. 5 shows a further alternative of a knife block according to the invention.
- the metallic core 13 "of the metal-plastic carrier 15" is formed from a tube, the circumference of which has annular grooves 22 arranged at regular intervals for inserting and positioning the individual knife blades 3 of the knife block 2 ".
- the metallic core 13" is from Plastic body 14 "is completely encapsulated or embedded in it and forms with it a compact body, namely the metal-plastic carrier 15" for the knife blades 3 of the knife block 2 ".
- the knife blades 3 here have bores or recesses 23 which are always arranged at the same height which are penetrated by the plastic of the plastic body 14 ", which is still liquid during the manufacturing process, whereby, in addition to the inseparable fixing in the core 13" of the knife block 2 ", a particularly firm, positionally correct anchoring of the knife blades in the plastic body 14" is achieved
- the profile rod forming the metallic core of the knife block or the tube more angular, for example quadrangular or hexagonal, which has the advantage that the entire knife block can thus be brought into predetermined different positions in order to enable different use of several peripheral regions of the knife blades, namely by twisting and inserting them within appropriately shaped Recesses in the clutch 8 carrying the knife block.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Dry Shavers And Clippers (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Die Erfindung betrifft einen Messerblock für Trockenrasierapparate mit quer zu seiner Längsachse auf einem Träger angeordneten Messerblättern kreisrunden Umfangs.The invention relates to a knife block for dry shavers with circular blades arranged transversely to its longitudinal axis on a support.
Bei den bisher bekannten Messerblöcken dieser Art ist ein Hohlzylinder als Träger der ringförmiger Messerblätter vorgesehen, die - im jeweils gleichen Abstand zueinander - in den aus Kunststoff oder Metall, beispielsweise Aluminium bestehenden Hohlzylinder eingebettet sind. Je ein axialer Bund an beiden Stirnseiten des Hohlzylinders dient dem Einsetzen des so ausgebildeten Messerblocks in kreisrunden Ausnehmungen einer mit dem Antrieb des Trockenrasierapparates verbundenen, in Längserstreckung des Klingenblockes hin- und herschwingender Kupplungsbrücke (JP-G M 48-42301).In the previously known knife blocks of this type, a hollow cylinder is provided as a carrier for the ring-shaped knife blades, which are embedded at the same distance from one another in the hollow cylinder made of plastic or metal, for example aluminum. One axial collar on each end of the hollow cylinder is used to insert the knife block thus formed into circular recesses of a coupling bridge connected to the drive of the dry shaving apparatus and swinging back and forth in the longitudinal extension of the blade block (JP-G M 48-42301).
Zum gezielten Umsetzen des zylindrischen Messerblockes zwecks In-Stellung-Bringens von wenigstens zwei diametral gegenüberliegenden Umfangsbereichen des Schermessers nach Abnutzung jeweils einer Hälfte oder eines Drittels des wirksamen Messerumfangs sind am Tragkörper stirnseitig ein dreikantiger Bund oder entsprechendeAusnehmungen vorgesehen, die mit ebensolchen Ausnehmungen oder Vorsprüngen an der den Messerblock aufnehmenden Kupplungsbrükke zusammenwirken (JP-GM 49-200).For the targeted implementation of the cylindrical knife block in order to bring at least two diametrically opposite circumferential areas of the shear knife into use after a half or a third of the effective knife circumference has been worn, a triangular collar or corresponding recesses are provided on the end face of the support body, which have the same recesses or projections on the the coupling block receiving the knife block interact (JP-GM 49-200).
Bei dem bisher bekannten Aufbau der zylindrischen Messerblöcke hat sich die Ausbildung des Trägers als problematisch erwiesen, insbesondere bei kleineren Messerblöcken, deren Durchmesser im Bereich unterhalb 10 mm liegen. Um ein Durchbiegen des Messerblocks unter Rasierdruck zu vermeiden und die nötige Einbettungstiefe für die Messerblätter zu erreichen, die für ihre standfeste Befestigung auf dem Träger unerlässlich ist, muss der Träger einerseits hinreichend dick gehalten werden, andererseits wird er aber durch diese Massnahme, insbesondere bei einer Ausbildung aus Metall, zu schwer, so dass der Anwendungsbereich solcher Messerblöcke eingeschränkt ist.In the construction of the cylindrical knife blocks known to date, the design of the carrier has proven to be problematic, in particular in the case of smaller knife blocks whose diameters are in the range below 10 mm. In order to avoid bending the knife block under shaving pressure and to achieve the necessary embedding depth for the knife blades, which is essential for their stable attachment to the carrier, the carrier must be kept sufficiently thick on the one hand, but on the other hand, this measure, in particular with a Formation of metal, too heavy, so that the field of application of such knife blocks is limited.
Aufgabe der Erfindung ist es nun, einen Messerblock der eingangs genannten Art zu schaffen, der bei geringem Gewicht gegen Durchbiegung mechanisch stabil gehalten werden kann, bei dem eine standfeste Halterung der Messerblätter mit guter Wärmeabfuhr gewährleistet und der insbesondere bei kleinen Messerblatt-Durchmessern kostengünstig herstellbar ist.The object of the invention is now to provide a knife block of the type mentioned, which can be kept mechanically stable with low weight against deflection, in which a stable mounting of the knife blades with good heat dissipation is ensured and which is inexpensive to produce, in particular with small knife blade diameters .
Gelöst wird diese Aufgabe gemäss der Erfindung dadurch, dass die Messerblätter von einem zylindrischen Metall-Kunststoff-Träger aufgenommen sind, der einen metallischen Kern und einen ihn eng umhüllenden und mit diesem eine kompakte Einheit bildenden zylindrischen Kunststoff-Körper umfasst.This object is achieved according to the invention in that the knife blades are received by a cylindrical metal-plastic carrier which comprises a metallic core and a cylindrical plastic body which closely surrounds it and forms a compact unit therewith.
Ein solcher Metall-Kunststoff-Träger für die kreisrunden Messerblätter des Messerblocks zeichnet sich durch gute Stabilität aus, denn er bildet infolge der engen stofflichen Verbindung seines metallischen Kernes mit dem durch Spritzgiessen aufgebrachten Material des Kunststoffkörpers eine äusserst biegesteife und verzugsfreie Trägereinheit. Darüber hinaus besitzen die auf diesem Metall-Kunststoff-Träger optimal zu verankernden kreisrunden Messerblätter infolge ihrer allseitigen Festlegung im Trägermaterial eine stets gleich gute Flexibilität in jeder Richtung und Schergüte an jedem Punkt ihrer Schneidkanten. Schliesslich lassen sich diese Messerblätter relativ einfach durch Rundschleifen äusserst massgerecht herstellen. Dieser Rundschliff erlaubt auch die Fertigung zu Messerblättern relativ kleinen Durchmessers, was die Herstellung von ebensolch kleinen Messerblöcken erlaubt. Sonach sind mit den erfindungsgemässen Messerblöcken Schersysteme relativ kleinen Umfangs realisierbar, die sich durch besonders gute Anpassung an die als Problemzonen bezeichneten Gesichtspartien des Rasierenden auszeichnen.Such a metal-plastic carrier for the circular knife blades of the knife block is characterized by good stability, because it forms an extremely rigid and distortion-free carrier unit due to the close material connection of its metallic core to the material of the plastic body applied by injection molding. In addition, the circular knife blades that are optimally anchored on this metal-plastic carrier have the same flexibility in every direction and shear quality at every point of their cutting edges due to their all-round fixing in the carrier material. Finally, these knife blades can be manufactured relatively easily by circular grinding. This round grinding also allows the production of knife blades of relatively small diameter, which allows the manufacture of such small knife blocks. Accordingly, the knife blocks according to the invention can be used to implement shaving systems of relatively small size, which are characterized by particularly good adaptation to the areas of the face of the shaving person designated as problem areas.
In näherer Ausführung der Erfindung sind die Messerblätter durch in vorgegebenen Abständen zueinander angeordnete umfangsseitige Aufnahmemittel im metallischen Kern des Metall-Kunststoff-Trägers verankert.In a more detailed embodiment of the invention, the knife blades are anchored in the metallic core of the metal-plastic carrier by circumferential receiving means arranged at predetermined intervals from one another.
Dieser Anordnung ergibt eine dauerhafte Festlegung und Abstützung und eine exakte Positionierung der Messerblätter unmittelbar am metallischen Kern des Metall-Kunststoff-Trägers des Klingenblockes.This arrangement results in permanent fixation and support and exact positioning of the knife blades directly on the metallic core of the metal-plastic carrier of the blade block.
Der gleiche Erfolg ist jedoch erzielbar, wenn die Messerblätter mit ihnen zugeordneten konzentrischen Innenrändern auf den metallischen Kern des Metall-Kunststoff-Trägers unmittelbar aufgesetzt und auf diesem in einem der Herstellung des Messerblockes dienenden Formnest vor dem Umspritzen des Kernes mit dem den Kunststoffkörper bildenden Material positioniert werden.However, the same success can be achieved if the knife blades with their assigned concentric inner edges are placed directly on the metallic core of the metal-plastic carrier and positioned thereon in a mold cavity used to manufacture the knife block before the core is encapsulated with the material forming the plastic body will.
Auch diese Anordnung gewährleistet eine sichere Festlegung und Abstützung der Messerblätter am metallischen Kern des Metall-Kunststoff-Trägers, wobei hier infolge der seitlichen Abstützung dieser Blätter durch das Material des den Kern umhüllenden Kunststoffkörpers gesonderte Aufnahmemittel im metallischen Kern entbehrlich werden.This arrangement also ensures a secure fixing and support of the knife blades on the metallic core of the metal-plastic carrier, whereby separate receptacles in the metallic core become unnecessary due to the lateral support of these blades by the material of the plastic body enveloping the core.
Eine darüber hinaus besonders gute Festlegung der einzelnen Messerblätter des Messerblockes in seinem Metall-Kunststoff-Träger erzielt man, wenn die Messerblätter symmetrisch zu ihren den metallischen Kern unmittelbar umgebenden konzentrischen Innenrändern angeordnete, vorzugsweise kleeblattartige Ausschnitte aufweisen, durch die beim Spritzgiessen des Kunststoffkörpers das flüssige Kunststoffmaterial hindurchtreten und die von den Messerblättern abgeteilten Räume bis zur gewünschten Dicke des Kunststoffkörpers auffüllen kann.In addition, a particularly good definition of the individual knife blades of the knife block in its metal-plastic carrier is achieved if the knife blades have, preferably cloverleaf-like cutouts arranged symmetrically to their concentric inner edges immediately surrounding the metallic core, through which the liquid plastic material during the injection molding of the plastic body can pass through and fill the spaces separated by the knife blades to the desired thickness of the plastic body.
Der metallische Kern des Messerblockes kann unterschiedlich ausgebildet sein. So ist es insbesondere im Hinblick auf seine drehsichere Festlegung im ihn umhüllenden Kunststoffkörper vorteilhaft, wenn der metallische Kern des Messerblockes als im Querschnitt mehrkantiger Profilstab mit durchgehenden Längsmulden konzipiert ist, dessen Stege mit den Innenrändern der Messerblätter korrespondieren. Im Formnest kann dann auch hier das den Kunststoffkörper bildende flüssige Material- mit dem Profilstab eineformschlüssige Verbindung bildend - über die Längsmulden in die Räume zwischen den Messerblättern eindringen.The metallic core of the knife block can be designed differently. It is particularly advantageous with regard to its rotationally secure fixing in the plastic body enveloping it, if the metallic core of the knife block is designed as a cross-section profile bar with continuous longitudinal troughs, the webs of which correspond to the inner edges of the knife blades. Then in the mold nest here, too, the liquid material forming the plastic body - forming a positive connection with the profile rod - penetrate into the spaces between the knife blades via the longitudinal recesses.
Mit besonderem Vorteil ist gemäss einer die Messerblätter am metallischen Kern verankerten, praxisgerechten Variante des Gegenstandes der Erfindung der metallische Kern des Messerblockes aus einem Rohr gebildet, dessen Mantel in stets gleichen Abständen angeordnete ringförmige Aufnahmenuten zum Einsetzen und Positionieren der einzelnen Messerblätter aufweist.With particular advantage, according to a practical variant of the object of the invention anchored to the knife blades on the metallic core, the metallic core of the knife block is formed from a tube, the jacket of which has ring-shaped receiving grooves, which are always arranged at equal intervals, for inserting and positioning the individual knife blades.
Zur sicheren Festlegung der so am metallischen Kern verankerten Messerblätter im gesamten Metall-Kunststoff-Träger des Messerblockes weisen die in dem rohrartigen metallischen Kern mittels der seinem Mantel zugeordneten Aufnahmenuten formschlüssig festgelegten positionierten Messerblätter Ausnehmungen auf, die von im Formnest flüssigen Material des dieses Rohr umhüllenden Kunststoffkörpers durchdrungen werden.In order to securely fix the knife blades anchored in this way to the metal core in the entire metal-plastic carrier of the knife block, the knife blades positioned in the tubular metal core by means of the receiving grooves assigned to its jacket have form-fitting recesses which are made of the material of the plastic body enveloping this tube in the mold cavity be penetrated.
Schliesslich liegt es im Rahmen der Erfindung, den Metall-Kunststoff-Träger des Messerblockes dadurch zu erzeugen, dass der metallische Kern beim Fertigungsprozess im Formnest nach dem Spritzvorgang in den eine konzentrische Axialbohrung aufweisenden Kunststoffkörper eingepresst wird.Finally, it is within the scope of the invention to produce the metal-plastic carrier of the knife block by pressing the metallic core during the manufacturing process in the mold cavity after the injection molding process into the plastic body which has a concentric axial bore.
Der Gegenstand der Erfindung ist nachstehend anhand der Zeichnung in einem mehrere Varianten umfassenden Ausführungsbeispiel näher erläutert. Es zeigen:
- Fig. 1 den Scherkopf eines Trockenrasierapparates mit von einer hin- und herschwingenden Kupplungsbrücke angetriebenen zylindrischen Messerblock,
- Fig. 2 einen Längsschnitt durch den Messerblock,
- Fig. 3 denselben Messerblock in stirnseitiger Draufsicht,
- Fig. 4 eine Variante des Messerblocks in Draufsicht auf die Stirnseite und
- Fig. 5 eine weitere Variante des erfindungsgemässen zylindrischen Messerblocks.
- 1 shows the shaving head of a dry shaving apparatus with a cylindrical knife block driven by a reciprocating coupling bridge,
- 2 shows a longitudinal section through the knife block,
- 3 the same knife block in a top view from the front,
- Fig. 4 shows a variant of the knife block in plan view of the front and
- 5 shows a further variant of the cylindrical knife block according to the invention.
Die Fig. 1 zeigt als generelle Übersicht den Scherkopf 1 eines Trockenrasierapparates, der mit einem zylindrischen Messerblock 2 ausgestattet ist, dessen kreisrunde Messerblätter 3 mit einer Scherfolie 4 zusammenwirken, die in einem Scherkopfrahmen 5 gehaltert ist, welcher auf ein Sims des Gehäuses 6 des Trockenrasierapparates aufsetzbar ist.Fig. 1 shows a general overview of the shaving head 1 of a dry shaver, which is equipped with a
Im Gehäuse 6 ist ein nicht dargestellter Schwingankermotor untergebracht, der über einen Schwinghebel 7, eine elastische Kupplung 8 eine U-förmige Kupplungsbrücke 9 antreibt, die den Messerblock 2 aufnimmt. Dies geschieht hier durch je einen den Stirnseiten des Messerblockes 2 angeformten Bund 10, der in je eines der gabelförmigen Enden 11 der Kupplungsbrücke 9 eingreift. Derso in der Kupplungsbrücke 9 festgelegte Messerblock 2 wird von einer der elastischen Kupplungen 8 zugeordneten und auf sie einwirkenden Druckfeder 12 gegen die im Scherkopfrah - men 5 beispielsweise durch Druckknopfverschlüsse festgelegten Scherfolie 4 elastisch angedrückt.In the housing 6, a swing armature motor (not shown) is accommodated, which drives a U-shaped coupling bridge 9 via a rocking
Wie aus der den Messerblock 2 im Längsschnitt zeigenden Fig. 2 ersichtlich, umfasst der Messerblock 2 einen metallischen Kern 13 der von einem rotationssymmetrischen Körper 14 aus Kunststoff konzentrisch umhüllt ist. Aus diesen so gebildeten Metall-Kunststoff-Träger 15 sind die einzelnen Messerblätter 3 aufgesetzt, und zwar derart, dass deren konzentrische Innen- bzw. Lochränder 16 unmittelbar auf dem Kern 13aufsitzen. Den Innenrändern 16 der Messerblätter 3 sind, wie Fig. 3 deutlicher zeigt, kleeblattförmige Ausschnitte 17 zugeordnet, durch die während der Herstellung des Messerblocks 2 der den Körper 14 bildende noch flüssige Kunststoff strömen kann, wodurch die Räume zwischen den Messerblättern 3 aufgefüllt und eine feste Verbindung zwischen dem Körper 14 und den Messerblättern 3 durch Einbettung geschaffen wird, die sich andererseits direkt auf dem metallischen Kern 13 abstützen.As can be seen from FIG. 2, which shows the
Die Fig. 3 zeigt in einer Draufsicht auf die vom Messerblatt 3 abgeschlossene Stirnseite des Messerblocks 2 noch anschaulicher das Integrieren jedes einzelnen Messerblattes 3 in den Metall-Kunststoff-Träger 15 durch dessen Einbetten in den Kunststoffkörper 14 mit Hilfe seiner vom Kunststoff beim Fertigungsprozess durch flossenen kleeblattförmigen Ausschnitte 17, die unmittelbar an den metallischen Kern 13 des Trägers 15 - diesen symmetrisch umgeben - angrenzen.3 shows, in a plan view of the end face of the
Bei vorher erwähnten Fertigungsprozess wird mit den Messerblättern 3 zugleich auch der metallische Träger 13 in den Kunststoffkörper 14 eingebettet bzw. von diesem fest umschlossen, was beispielsweise durch das Zentrieren derselben in einem zur Fertigung des Messerblockes 2 herangezogenen Formnest geschieht.In the aforementioned manufacturing process, the
Der zylindrische Messerblock 2 ermöglicht den wahlweisen Gebrauch unterschiedlicher Bereiche seiner Messerblätter 3 für das Zusammenwirken mit der Scherfolie 4 des Trockenrasierapparates durch Verdrehen um seine Längsachse y. Das hierzu erforderliche Umsetzen des Klingenblockes 2 innerhalb der Gabeln 11 der Kupplungsbrücke 9 wird erleichtert durch an den Stirnseiten des Metall-Kunststoff-Trägers 15 zugeordneten Griffmulden 18, die ein sicheres Erfassen des umzusetzenden oder auszuwechselnden Messerblockes ermöglichen.The
Zum Fixieren des Klingenblockes 2 nach dem Umsetzen bzw. nach dem Auswechseln in seine jeweils neue Gebrauchslage sind hier die Metall-Kunststoff-Körper 15 im Aufnahmebereich durch die Gabeln 11 der Kupplungsbrücke 9 umfangsseitig zwei einander parallele Zentrierflächen 19 angeformt, die mit entsprechenden parallelen Führungsflächen der Gabeln 11 für den Messerblock 2 zusammenwirken und sonach ein schnelles und problemloses Einstellen der jeweiligen Scherzone ermöglichen.To fix the
Eine alternative Lösung hinsichtlich der Fertigung und Ausbildung des zylindrischen Messerblocks zeigt Fig. 4. Hier besteht der Metall-Kunststoff-Träger 15' des Messerblockes 2' aus einem als Profilstab ausgebildeten metallischen Kern 13' und einem mit diesem eng verbundenen zylindrischen Kunststoffkörper 14'. Auf den so konzipierten Metall-Kunststoff-Träger 15' sind die einzelnen Messerblätter 3 aufgesetzt, deren Innen- bzw. Lochränder 16 an den Stegen 20 des profilierten metallischen Kernes 13' aufliegen und sich dort abstützen.An alternative solution with regard to the manufacture and design of the cylindrical knife block is shown in FIG. 4. Here is the metal art Fabric carrier 15 'of the knife block 2' made of a metal core 13 'formed as a profile bar and a cylindrical plastic body 14' closely connected to it. The
Die Erfindung des so aufgebauten zylindrischen Klingenblockes 2' geschieht ebenfalls im Spritzverfahren, wobei der als Profilstab konzipierte metallische Kern 13' in einem Formnest zentriert wird, worauf beim Spritzvorgang der den Kunststoffkörper 14' bildende Kunststoff durch die Längsmulden 21 des hier im Querschnitt dreikantigen Metallkerns 13' fliesst, wodurch, ebenso wie bei dem vorstehend beschriebenen Beispiel, eine innige Verbindung desselben mit dem ihn allseitig umgebenden Kunststoffkörper 14' und mit den unmittelbar auf dem Kern 13'sitzenden Messerblättern 3 erreicht wird. Die Messerblätter 3 zentrieren sich dabei von selbst auf dem profilierten Kern 13' des Metall-Kunststoff-Trägers 15'.The invention of the cylindrical blade block 2 'thus constructed also takes place in the injection molding process, with the metallic core 13' designed as a profile bar being centered in a mold cavity, whereupon during the injection molding process the plastic forming the plastic body 14 'through the
Die Fig. 5zeigt schliesslich eine weitere Alternative eines erfindungsgemässen Messerblockes. Hier ist der metallische Kern 13" des Metall-Kunststoff-Trägers 15" aus einem Rohr gebildet, dessen Umfang in regelmässigen Abständen angeordnete ringförmige Nuten 22 zum Einsetzen und Positionieren der einzelnen Messerblätter 3 des Messerblockes 2" aufweist. Der metallische Kern 13" ist vom Kunststoffkörper 14" vollständig umspritzt bzw. in diesen eingebettet und bildet mit ihm einen kompakten Körper, nämlich den Metall-Kunststoff-Träger 15" für die Messerblätter 3 des Messerblockes2". Die Messerblätter 3 weisen hier in stets gleicher Höhe angeordnete Bohrungen bzw. Ausnehmungen 23 auf, die vom beim Fertigungsprozess noch flüssigen Kunststoff des Kunststoffkörpers 14" durchsetzt werden, wodurch neben der unlösbaren Festlegung im Kern 13" des Messerblockes 2" noch eine besonders feste, positionsgerechte Verankerung der Messerblätter im Kunststoffkörper 14" erzielt wird. Es liegt im Rahmen der Erfindung, den den metallischen Kern des Messerblockes bildenden Profilstab oder das Rohr mehreckig, beispielsweise 4-oder 6-eckig, zu gestalten, was den Vorteil hat, dass damit der gesamte Messerblock in vorgegebene unterschiedliche Positionen gebracht werden kann, um einen unterschiedlichen Gebrauch mehrerer Umfangsbereiche der Messerblätter zu ermöglichen und zwar durch Verdrehen und Einsetzen innerhalb entsprechend geformter Ausnehmungen in der den Messerblock tragenden Kupplung 8.Finally, FIG. 5 shows a further alternative of a knife block according to the invention. Here, the
Begriffsliste:
- 1 Scherkopf
- 2, 2', 2" Messerblock
- 3 Messerblätter
- 4 Scherfolie
- 5 Scherkopfrahmen
- 6 Gehäuse
- 7 Schwinghebel
- 8 Kupplung
- 9 Kupplungsbrücke
- 10 Bund
- 11 Gabelförmige Enden von 9
- 12 Druckfeder
- 13,13', 13" Kern
- 14' 14'' 14'' Kunststoffkörper
- 15, 15', 15" Metall- Kunststoff-Träger aus 13 u. 14
- 16 Lochränder
- 17
Kleeblattförmige Ausschnitte 18 Griffmulden - 19 Zentrierflächen
- 20 Stege
- 21 Längsmulden
- 22 Nuten
- 23 Öffnungen
y Längsachse von 2
- 1 shaving head
- 2, 2 ', 2 "knife block
- 3 knife blades
- 4 shaving foil
- 5 shaving head frames
- 6 housing
- 7 rocker arms
- 8 clutch
- 9 coupling bridge
- 10 frets
- 11 forked ends of 9
- 12 compression spring
- 13,13 ', 13 "core
- 14 '14''14''plastic body
- 15, 15 ', 15 "metal-plastic carrier made of 13 and 14
- 16 hole edges
- 17
cloverleaf cutouts 18 recessed grips - 19 centering surfaces
- 20 bridges
- 21 longitudinal troughs
- 22 grooves
- 23 openings
- y longitudinal axis of 2
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT86112974T ATE40069T1 (en) | 1985-09-25 | 1986-09-19 | KNIFE BLOCK FOR DRY SHAVERS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853534166 DE3534166A1 (en) | 1985-09-25 | 1985-09-25 | KNIFE BLOCK FOR DRY SHAVERS |
| DE3534166 | 1985-09-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0216332A1 EP0216332A1 (en) | 1987-04-01 |
| EP0216332B1 true EP0216332B1 (en) | 1989-01-18 |
Family
ID=6281893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86112974A Expired EP0216332B1 (en) | 1985-09-25 | 1986-09-19 | Blade unit for a dry shaver |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4751780A (en) |
| EP (1) | EP0216332B1 (en) |
| JP (1) | JP2672298B2 (en) |
| AT (1) | ATE40069T1 (en) |
| DE (2) | DE3534166A1 (en) |
| HK (1) | HK102990A (en) |
| SG (1) | SG84690G (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11219277B1 (en) | 2021-03-19 | 2022-01-11 | Jezekiel Ben-Arie | Fast button attachment by resilient flaps trapping |
| US11622605B2 (en) * | 2021-03-19 | 2023-04-11 | Jezekiel Ben-Arie | Button attachment by resilient gates trapping mechanism |
| US11375776B1 (en) | 2021-12-27 | 2022-07-05 | Jezekiel Ben-Arie | Button fastening kit |
| US11766096B1 (en) | 2022-06-01 | 2023-09-26 | Jezekiel Ben-Arie | Button fastening kit-III |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1156336B (en) * | 1960-01-19 | 1963-10-24 | Siemens Elektrogeraete Gmbh | Dry shaver |
| US3154851A (en) * | 1962-07-30 | 1964-11-03 | Carl E Erickson | Electric shaver |
| US3128550A (en) * | 1962-08-29 | 1964-04-14 | Miselli Afro | Cutting head for electric shavers having a helical shaped movable cutter |
| DE1177976B (en) * | 1962-12-05 | 1964-09-10 | Lang Geb | Shaving head for hair clippers, preferably for electric razors |
| AT257414B (en) * | 1965-08-27 | 1967-10-10 | Payer Lux | Knife block, in particular for dry razors, and method for producing the same |
| JPS49200Y1 (en) * | 1969-11-25 | 1974-01-07 | ||
| DE2019744A1 (en) * | 1970-04-23 | 1971-11-04 | Braun Ag, 6000 Frankfurt | Knife block for dry shavers with a support body made of plastic |
| JPS4842301U (en) * | 1971-09-21 | 1973-05-30 | ||
| JPS4842301A (en) * | 1971-10-01 | 1973-06-20 | ||
| JPS4846887U (en) * | 1971-10-04 | 1973-06-19 | ||
| US3766663A (en) * | 1972-03-07 | 1973-10-23 | Detroit Lime Co | Preheater for lime kiln |
| JPS51129352A (en) * | 1975-05-01 | 1976-11-10 | Hamasawa Kogyo:Kk | Inner blade of reciprocating type electric razor |
| DE2617332A1 (en) * | 1976-04-21 | 1977-10-27 | Karlheinz Niesner | Dry razor with tubular cutting cover - has one cover end rubber capped and axially reciprocating drive |
| JPS5748233A (en) * | 1980-09-08 | 1982-03-19 | Toshiba Corp | Exposure system for semiconductor substance |
| JPS58169482A (en) * | 1982-03-31 | 1983-10-05 | 松下電工株式会社 | Reciprocal type electric razor |
| JPS5943008U (en) * | 1982-07-16 | 1984-03-21 | 昭和電線電纜株式会社 | Snow accumulation prevention electric wire |
-
1985
- 1985-09-25 DE DE19853534166 patent/DE3534166A1/en active Granted
-
1986
- 1986-09-19 DE DE8686112974T patent/DE3661803D1/en not_active Expired
- 1986-09-19 AT AT86112974T patent/ATE40069T1/en not_active IP Right Cessation
- 1986-09-19 JP JP61221747A patent/JP2672298B2/en not_active Expired - Fee Related
- 1986-09-19 EP EP86112974A patent/EP0216332B1/en not_active Expired
- 1986-09-25 US US06/911,579 patent/US4751780A/en not_active Expired - Fee Related
-
1990
- 1990-10-23 SG SG846/90A patent/SG84690G/en unknown
- 1990-12-06 HK HK1029/90A patent/HK102990A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62109590A (en) | 1987-05-20 |
| DE3534166C2 (en) | 1989-06-01 |
| DE3661803D1 (en) | 1989-02-23 |
| US4751780A (en) | 1988-06-21 |
| HK102990A (en) | 1990-12-14 |
| DE3534166A1 (en) | 1987-04-16 |
| JP2672298B2 (en) | 1997-11-05 |
| EP0216332A1 (en) | 1987-04-01 |
| SG84690G (en) | 1991-01-18 |
| ATE40069T1 (en) | 1989-02-15 |
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