EP1497082B1 - Shearing head for hair clippers - Google Patents

Shearing head for hair clippers Download PDF

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Publication number
EP1497082B1
EP1497082B1 EP02807253A EP02807253A EP1497082B1 EP 1497082 B1 EP1497082 B1 EP 1497082B1 EP 02807253 A EP02807253 A EP 02807253A EP 02807253 A EP02807253 A EP 02807253A EP 1497082 B1 EP1497082 B1 EP 1497082B1
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EP
European Patent Office
Prior art keywords
shaving head
slots
cutter
boundary lines
engagement surface
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.)
Expired - Lifetime
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EP02807253A
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German (de)
French (fr)
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EP1497082A1 (en
Inventor
Wolfgang Franke
Werner Haczek
Thorsten Piesker
Stefan FÜRST
Andreas Peter
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Braun GmbH
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Braun GmbH
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Publication of EP1497082A1 publication Critical patent/EP1497082A1/en
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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
    • B26B19/042—Long hair cutters or older types comprising a cutting grid

Definitions

  • the invention relates to a shaving head for a hair trimmer, with at least one upper blade and at least one associated therewith, cutting edges having lower blade, which are movable by a drive relative to each other, wherein the upper blade has a contact surface of webs and slots and the slots at least one of two lateral, the width of the contact surface defining boundary lines of the contact surface are open.
  • Such a shaving head is from the DE 43 12 060 C1
  • a shaving head is from the DE 43 12 060 C1
  • the known shaving head has a lower blade, which consists of a multi-slotted, U-shaped blade, which is driven to oscillate in the longitudinal direction.
  • This blade is pressed against an upper blade, the contact surface for the skin is formed on the opposite side of the upper blade of the upper blade.
  • This contact surface consists of a central web from which a plurality of comb-like prongs arranged on both sides in the transverse direction.
  • the tines thereby form cutting edges, which are in conjunction with the lower blade in a position to cut into the corresponding slots penetrated hair.
  • the comb-like prongs limit thereby slits, which lead from the longitudinal side of the contact surface to the central web and end there.
  • the longitudinal central web therefore serves as a trap for the hairs that have entered, so that they are held in the shaving head until a cutting event occurs.
  • the length of the cutting edges of the upper blade is slightly less than half the width of the upper blade in the known shaving head.
  • the well-known shaving head has indeed proven itself in practice, but may occur in particular at higher feed speed of the hair trimmer, the case that an initially caught between the tines hair is only caught on the central web, but then pulled over them away, so that it outside of the area of the cut edges before a cutting event has occurred.
  • the cutting edges ie the length of the tines or the slots would have to be appreciably extended, which would lead to a significant increase in the dimensions of the shaving head.
  • the invention is therefore an object of the invention to provide a generic shaving head, which is characterized by a particularly high level of effectiveness even at higher feed speeds of the hair trimmer, while still having very compact proportions.
  • the webs are formed in the form of meanders, sinusoids or serpentine lines, which run back and forth between the two opposite lateral boundary lines of the stop surface, wherein the reversal points (18) of the webs (17) in the area the boundary lines are.
  • the inventive solution cutting edges can be realized, whose length is approximately the measure of the width of the contact surface, so the shaving head width. These extended cutting edges increase the likelihood that a once threaded in the slot hair is cut even when advancing the hair clipper. At higher feed the hair clipper, namely, the hair can not slip through the slot in such a short time, but it is caught between the webs until it is cut.
  • the support of the upper knife on the lower blade is almost exclusively realized by the central web, it is virtually single track.
  • this guidance takes place in the region of the turning points of the meander.
  • the guide therefore consists of interrupted sections, which are located alternately in the region of one or the other lateral boundary line.
  • the lower blade is guided on two laterally outboard rails. This represents optimal guidance of the two cutting elements.
  • the shaving head geometries ie the abutment surfaces of the total shear surfaces themselves, can be designed very differently, it is provided in one embodiment of the invention that the two lateral boundary lines are formed as parallels and form the longitudinal sides of the contact surface.
  • a further embodiment of the invention provides that the two lateral boundary lines are formed as interleaved, in particular concentric circles and form the outer or inner circumference of the contact surface. In this way, e.g. rectangular or annular shear surfaces are formed.
  • the first and / or second lateral boundary line surmount the corresponding lateral boundaries of the associated lower blade, so that one or more reverse portions of the webs opposite protruding comb-like the lower knife. This achieves a particularly good threading and erecting effect. This effect is further enhanced by the fact that the width of the slots widens in a funnel shape in the opening direction.
  • the length of the slots is advantageously such that the end of the slots opposite the opening is within the range traveled by the cutting edges of the lower blade. This leads to a particularly stable mounting of the relatively moving cutting elements and counteracts hooking of the respective cutting edges.
  • the prevention of entanglement is also a training in which the slots or webs of the upper blade have a different from the pitch of the cutting edges of the lower blade pitch.
  • the shaving head according to the invention can be used both in linearly oscillating and in rotationally driven systems.
  • the shaving head shown in Fig. 1 has a lower blade 1 with a coupling element 2 for coupling to an electric drive, not shown, of the hair trimmer, such as a driven eccentric shaft or swing bridge.
  • an electric drive not shown
  • the lower blade 1 is driven in an oscillating manner in the longitudinal direction.
  • a pressure spring 3 is further attached, which is designed as a bent leaf spring and is supported with their end portions 4 each on a support 5.
  • the carrier 5 each have locking lugs 6, with which they can be locked in a housing, not shown in the drawing or a component connected to the housing, in particular in the removable frame of a shaving system, a hair clipper.
  • the carrier 5 are on both sides each with outer and inner welds 7 and 8, respectively, by means of which they can be welded to corresponding mating surfaces 7a and 8a, which are arranged on the upper blade 9.
  • the lower blade 1 is biased by the pressure spring 3 relative to the upper blade 9 and is always pressed against this.
  • the lower blade is designed as a U-shaped profile, the two legs are directed downward and at the top of a plurality of transverse parallel notches 10 are provided, between which webs 11 remain, which form the cutting edges of the blade.
  • the upper blade 9 consists of two parallel side walls 12, each having the mating surfaces 7a and 8a, as well as from a further the two side walls 12 connecting strip-shaped wall element 13.
  • the outer surface of this wall element 13 forms the contact surface 14 of the shaving head.
  • the side walls 12 and the wall element 13 form the guide of the driven lower blade 1 and enclose it.
  • the width of the contact surface 14 is defined by two lateral boundary lines 15 and 16, which have a planar contour in the region of their end sections lying opposite one another in the longitudinal direction. Between these end portions is the actual cutting region in which the contact surface 14 of the upper blade 9 is formed by interconnected webs 17 which meander, sinusoidal or serpentine.
  • the webs 17 have transverse portions which form the cutting edges 22, as well as turning points 18, which have outwardly facing larger radii 19 and inner small radii 20.
  • the large radii 19 form comb tips, which are particularly skin-friendly due to their large radii.
  • the small radii 20 connect the cutting edges 22 and are at least as large as to exceed the radius of a hair. In this way it is ensured that trapped between the cutting edges 22 hair can not be clamped and thus pulled.
  • the maximum outer radius 19 in the shaving head according to the invention can be performed as large as the entire land width plus half the slit width.
  • the outer radius 19 abruptly changes to a right angle;
  • these points 23 there is a welding of the wall element 13 with the integrally formed supports 24 of the side walls 12.
  • the bearing surface formed by the right angle at the point 23 is used for adjustment and fixing in the welding apparatus.
  • the invention can be carried out without these corners at the points 23, so that then all reversal points have large radii 19 at the comb tips.
  • the radii 19 also form funnel-shaped Einfädelzonen for the slots 21, which expand outward.
  • the meandering webs 17 with their arcuate deflection points 18, to which they are connected in part via the supports 24 with the side walls 12, represent an overall comparatively resilient contact surface 14 for the skin to be shaved.
  • This can be adapted to skin contours at least to a small extent and possibly avoid unevenness easier than previously known shaving heads. Nevertheless, it is ensured even with a deformation of the contact surface 14 in the region of the cutting zone that no hooking can be done with the webs 11 of the lower blade 1.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Scissors And Nippers (AREA)

Abstract

The invention is directed to a shaving head for a hair cutting apparatus, with at least one outer cutter and at least one under cutter associated therewith and having cutting edges, said cutters being movable relative to one another by a drive mechanism, with the outer cutter having an engagement surface comprised of bars and slots, which slots are open at least towards one of two lateral boundary lines of the engagement surface, said boundary lines defining the width of the engagement, wherein the bars are shaped in a meandering, sinusoidal or serpentine configuration extending to and from between the two opposite lateral boundary lines of the engagement surface.

Description

Die Erfindung betrifft einen Scherkopf für ein Haarschneidegerät, mit mindestens einem Obermesser und mindestens einem diesem zugeordneten, Schneidkanten aufweisenden Untermesser, die durch einen Antrieb relativ zueinander bewegbar sind, wobei das Obermesser eine Anlagefläche aus Stegen und Schlitzen aufweist und die Schlitze mindestens zu einer von zwei seitlichen, die Breite der Anlagefläche definierenden Begrenzungslinien der Anlagefläche hin offen sind.The invention relates to a shaving head for a hair trimmer, with at least one upper blade and at least one associated therewith, cutting edges having lower blade, which are movable by a drive relative to each other, wherein the upper blade has a contact surface of webs and slots and the slots at least one of two lateral, the width of the contact surface defining boundary lines of the contact surface are open.

Ein derartiger Scherkopf ist aus der DE 43 12 060 C1 bekannt und wird beispielsweise als Langhaarschneider in Kombination mit einem Kurzhaarschneidsystem eines elektrischen Trockenrasierapparates verwendet. Eine bevorzugte Verwendung findet er integriert zwischen zwei Scherfolien als Mittelschneider. Der vorbekannte Scherkopf besitzt ein Untermesser, welches aus einer mehrfach geschlitzten, U-förmigen Klinge besteht, die in Längsrichtung oszillierend angetrieben ist. Diese Klinge wird gegen ein Obermesser gedrückt, deren Anlagefläche für die Haut auf der dem Untermesser gegenüberliegenden Seite des Obermessers ausgebildet ist. Diese Anlagefläche besteht aus einem Mittelsteg, von dem aus eine Vielzahl von kammartig angeordneten Zinken beidseitig in Querrichtung ausgehen. Die Zinken bilden dabei Schneidkanten, die in Verbindung mit dem Untermesser in der Lage sind, in die entsprechenden Schlitze eingedrungene Haare zu schneiden. Die kammartigen Zinken begrenzen dabei Schlitze, die von der Längsseite der Anlagefläche bis zum Mittelsteg führen und dort enden. Der längsverlaufende Mittelsteg dient daher mit als Falle für die eingetretenen Haare, so daß diese im Scherkopf gehalten werden, bis ein Schnittereignis erfolgt. Die Länge der Schneidkanten des Obermessers beträgt bei dem bekannten Scherkopf etwas weniger als die halbe Breite des Obermessers.Such a shaving head is from the DE 43 12 060 C1 For example, it is known and used as a long hair trimmer in combination with a short hair trimmer of an electric dry shaver. A preferred use he finds integrated between two shear films as a center cutter. The known shaving head has a lower blade, which consists of a multi-slotted, U-shaped blade, which is driven to oscillate in the longitudinal direction. This blade is pressed against an upper blade, the contact surface for the skin is formed on the opposite side of the upper blade of the upper blade. This contact surface consists of a central web from which a plurality of comb-like prongs arranged on both sides in the transverse direction. The tines thereby form cutting edges, which are in conjunction with the lower blade in a position to cut into the corresponding slots penetrated hair. The comb-like prongs limit thereby slits, which lead from the longitudinal side of the contact surface to the central web and end there. The longitudinal central web therefore serves as a trap for the hairs that have entered, so that they are held in the shaving head until a cutting event occurs. The length of the cutting edges of the upper blade is slightly less than half the width of the upper blade in the known shaving head.

Der bekannte Scherkopf hat sich zwar in der Praxis bewährt, jedoch kann insbesondere bei höherer Vorschubgeschwindigkeit des Haarschneidegerätes der Fall auftreten, daß ein zunächst zwischen den Zinken eingefangenes Haar zwar erst am Mittelsteg gefangen wird, jedoch anschließend über diesen hinweg gezogen wird, so daß es außerhalb des Bereiches der Schnittkanten gelangt, bevor ein Schneidereignis aufgetreten ist. Um die Wahrscheinlichkeit des Auftretens dieses Falles bei dem vorbekannten Scherkopf zu verringern, müßten die Schneidkanten, d.h. die Länge der Zinken bzw. der Schlitze merkbar verlängert werden, was zu einem deutlichen Anstieg der Abmessungen des Scherkopfes führen würde.The well-known shaving head has indeed proven itself in practice, but may occur in particular at higher feed speed of the hair trimmer, the case that an initially caught between the tines hair is only caught on the central web, but then pulled over them away, so that it outside of the area of the cut edges before a cutting event has occurred. In order to reduce the likelihood of this case occurring in the prior art shaving head, the cutting edges, ie the length of the tines or the slots would have to be appreciably extended, which would lead to a significant increase in the dimensions of the shaving head.

Der Erfindung liegt daher die Aufgabe zugrunde, einen gattungsgemäßen Scherkopf zu schaffen, der sich durch eine besonders hohe Effektivität auch bei höheren Vorschubgeschwindigkeiten des Haarschneidegerätes auszeichnet, und dabei dennoch sehr kompakte Ausmaße aufweist.The invention is therefore an object of the invention to provide a generic shaving head, which is characterized by a particularly high level of effectiveness even at higher feed speeds of the hair trimmer, while still having very compact proportions.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Stege in Form von Mäandern, Sinuskurven oder Schlangenlinien ausgebildet sind, die zwischen den beiden sich gegenüberliegenden seitlichen Begrenzungslinien der Anschlagfläche hin- und her verlaufen, wobei die Umkehrpunkte (18) der Stege (17) im Bereich der Begrenzungslinien liegen. Durch die erfindungsgemäße Lösung können Schneidkanten realisiert werden, deren Länge annähernd das Maß der Breite der Anlagefläche, also der Scherkopfbreite beträgt. Diese verlängerten Schneidkanten erhöhen die Wahrscheinlichkeit, daß ein einmal in den Schlitz eingefädeltes Haar auch bei Vorschub des Haarschneidegerätes geschnitten wird. Bei höherem Vorschub des Haarschneidegerätes kann das Haar nämlich nicht in so kurzer Zeit durch den Schlitz hindurchrutschen, sondern es wird so lange zwischen den Stegen gefangen, bis es geschnitten ist.This object is achieved in that the webs are formed in the form of meanders, sinusoids or serpentine lines, which run back and forth between the two opposite lateral boundary lines of the stop surface, wherein the reversal points (18) of the webs (17) in the area the boundary lines are. The inventive solution cutting edges can be realized, whose length is approximately the measure of the width of the contact surface, so the shaving head width. These extended cutting edges increase the likelihood that a once threaded in the slot hair is cut even when advancing the hair clipper. At higher feed the hair clipper, namely, the hair can not slip through the slot in such a short time, but it is caught between the webs until it is cut.

Bei dem vorbekannten Scherkopf wird die Abstützung des Obermessers auf dem Untermesser fast ausschließlich durch des Mittelsteg realisiert, sie ist quasi einspurig. Bei der erfindungsgemäßen Lösung erfolgt diese Führung im Bereich der Umkehrpunkte der Mäander. Die Führung besteht daher aus unterbrochenen Abschnitten, die sich alternierend im Bereich der einen oder anderen seitlichen Begrenzungslinie befinden. Das Untermesser wird quasi auf zwei seitlich außenliegenden Schienen geführt. Dies stellt eine optimale Führung der beiden Schneidelemente dar.In the known shaving head, the support of the upper knife on the lower blade is almost exclusively realized by the central web, it is virtually single track. In the solution according to the invention, this guidance takes place in the region of the turning points of the meander. The guide therefore consists of interrupted sections, which are located alternately in the region of one or the other lateral boundary line. The lower blade is guided on two laterally outboard rails. This represents optimal guidance of the two cutting elements.

Die Scherkopfgeometrien, also die Anlageflächen der Gesamtscherflächen selbst, können sehr unterschiedlich ausgeführt sein, so ist in einer Ausführungsform der Erfindung vorgesehen, daß die beiden seitlichen Begrenzungslinien als Parallelen ausgebildet sind und die Längsseiten der Anlagefläche bilden. Eine weitere Ausführungsform der Erfindung sieht vor, daß die beiden seitlichen Begrenzungslinien als ineinanderliegende, insbesondere konzentrische Kreise ausgebildet sind und den Außen- bzw. Innenumfang der Anlagefläche bilden. Auf diese Weise können z.B. rechteckige oder ringförmige Scherflächen gebildet werden.The shaving head geometries, ie the abutment surfaces of the total shear surfaces themselves, can be designed very differently, it is provided in one embodiment of the invention that the two lateral boundary lines are formed as parallels and form the longitudinal sides of the contact surface. A further embodiment of the invention provides that the two lateral boundary lines are formed as interleaved, in particular concentric circles and form the outer or inner circumference of the contact surface. In this way, e.g. rectangular or annular shear surfaces are formed.

Um ein Aufrichten von dicht an der Haut anliegenden Haaren zu verbessern, ist bei einer bevorzugten Ausführungsform der Erfindung vorgesehen, daß die erste und/oder zweite seitliche Begrenzungslinie die entsprechenden seitlichen Begrenzungen des zugeordneten Untermessers überragen, so daß einzelne oder mehrere Umkehrbereiche der Stege gegenüber dem Untermesser kammartig hervorstehen. Dadurch wird ein besonders guter Einfädel- und Aufrichteffekt erzielt. Erhöht wird dieser Effekt noch dadurch, daß sich die Breite der Schlitze in Öffnungsrichtung hin trichterförmig erweitert.In order to improve the erection of hair lying close to the skin, in a preferred embodiment of the invention it is provided that the first and / or second lateral boundary line surmount the corresponding lateral boundaries of the associated lower blade, so that one or more reverse portions of the webs opposite protruding comb-like the lower knife. This achieves a particularly good threading and erecting effect. This effect is further enhanced by the fact that the width of the slots widens in a funnel shape in the opening direction.

Die Länge der Schlitze ist vorteilhafterweise derart bemessen, daß das der Öffnung gegenüberliegende Ende der Schlitze innerhalb des von den Schneidkanten des Untermessers überfahrenen Bereiches liegt. Dies führt zu einer besonders stabilen Lagerung der relativ zueinander bewegten Schneidelemente und wirkt einem Verhaken der jeweiligen Schneidkanten entgegen. Dem Verhindern eines Verhakens dient auch eine Ausbildung, bei der die Schlitze bzw. Stege des Obermessers eine von der Teilung der Schneidkanten des Untermessers abweichende Teilung besitzen.The length of the slots is advantageously such that the end of the slots opposite the opening is within the range traveled by the cutting edges of the lower blade. This leads to a particularly stable mounting of the relatively moving cutting elements and counteracts hooking of the respective cutting edges. The prevention of entanglement is also a training in which the slots or webs of the upper blade have a different from the pitch of the cutting edges of the lower blade pitch.

Der erfindungsgemäße Scherkopf kann sowohl bei linear oszillierend als auch bei rotierend angetriebenen Systemen eingesetzt werden.The shaving head according to the invention can be used both in linearly oscillating and in rotationally driven systems.

Weitere Ziele, Merkmale, Vorteile und Anwendungsmöglichkeiten der vorliegenden Erfindung ergeben sich aus der nachstehenden Beschreibung eines Ausführungsbeispiels. Dabei bilden alle beschriebenen oder bildlich dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand der vorliegenden Erfindung, auch unabhängig von ihrer Zusammenfassung in den Ansprüchen oder deren Rückbeziehung.Other objects, features, advantages and applications of the present invention will become apparent from the following description of an embodiment. All described or illustrated features alone or in any combination form the subject matter of the present invention, also independent of their summary in the claims or their dependency.

Hierzu zeigen in perspektivischer Darstellung:

Fig. 1
eine Explosionsdarstellung und
Fig. 2
eine Draufsicht auf den erfindungsgemäßen Scherkopf.
To this show in perspective:
Fig. 1
an exploded view and
Fig. 2
a plan view of the shaving head according to the invention.

Der in Fig. 1 dargestellte Scherkopf besitzt ein Untermesser 1 mit einem Kupplungselement 2 zum Ankuppeln an einen nicht dargestellten elektrischen Antrieb des Haarschneidegerätes, beispielsweise eine angetriebene Exzenterwelle oder Schwingbrücke. Durch den Antrieb ist das Untermesser 1 oszillierend in Längsrichtung antreibbar. Am Untermesser 1 ist ferner eine Andruckfeder 3 befestigt, die als gebogene Blattfeder ausgeführt ist und sich mit ihren Endbereichen 4 jeweils an einem Träger 5 abstützt. Die Träger 5 besitzen jeweils Rastnasen 6, mit denen sie in einem zeichnerisch nicht dargestellten Gehäuse oder einem mit dem Gehäuse verbundenen Bauteil, insbesondere im Wechselrahmen eines Schersystems, eines Haarschneidegerätes verrastet werden können. Die Träger 5 sind beidseitig jeweils mit äußeren und inneren Anschweißpunkten 7 bzw. 8 versehen, mittels derer sie mit entsprechenden Gegenflächen 7a bzw. 8a, die am Obermesser 9 angeordnet sind, verschweißt werden können.The shaving head shown in Fig. 1 has a lower blade 1 with a coupling element 2 for coupling to an electric drive, not shown, of the hair trimmer, such as a driven eccentric shaft or swing bridge. By the drive, the lower blade 1 is driven in an oscillating manner in the longitudinal direction. At the lower blade 1, a pressure spring 3 is further attached, which is designed as a bent leaf spring and is supported with their end portions 4 each on a support 5. The carrier 5 each have locking lugs 6, with which they can be locked in a housing, not shown in the drawing or a component connected to the housing, in particular in the removable frame of a shaving system, a hair clipper. The carrier 5 are on both sides each with outer and inner welds 7 and 8, respectively, by means of which they can be welded to corresponding mating surfaces 7a and 8a, which are arranged on the upper blade 9.

Sind die Träger 5 und das Obermesser 9 miteinander verschweißt, so ist das Untermesser 1 durch die Andruckfeder 3 gegenüber dem Obermesser 9 vorgespannt und wird stets an dieses angedrückt.Are the carrier 5 and the upper blade 9 welded together, the lower blade 1 is biased by the pressure spring 3 relative to the upper blade 9 and is always pressed against this.

Das Untermesser ist als U-förmiges Profil ausgeführt, dessen beiden Schenkel nach unten gerichtet sind und an dessen Oberseite eine Vielzahl von querverlaufenden parallelen Einkerbungen 10 vorgesehen sind, zwischen denen Stege 11 verbleiben, die die Schneidkanten der Klinge bilden.The lower blade is designed as a U-shaped profile, the two legs are directed downward and at the top of a plurality of transverse parallel notches 10 are provided, between which webs 11 remain, which form the cutting edges of the blade.

Das Obermesser 9 besteht aus zwei parallelen Seitenwänden 12, die jeweils die Gegenflächen 7a und 8a aufweisen, sowie aus einem weiteren die beiden Seitenwände 12 verbindenden streifenförmigen Wandelement 13. Die Außenfläche dieses Wandelementes 13 bildet die Anlagefläche 14 des Scherkopfes. In montiertem Zustand bilden die Seitenwände 12 und das Wandelement 13 die Führung des angetriebenen Untermessers 1 und umschließen es.The upper blade 9 consists of two parallel side walls 12, each having the mating surfaces 7a and 8a, as well as from a further the two side walls 12 connecting strip-shaped wall element 13. The outer surface of this wall element 13 forms the contact surface 14 of the shaving head. In the assembled state, the side walls 12 and the wall element 13 form the guide of the driven lower blade 1 and enclose it.

Wie besonders gut in Fig. 2 zu erkennen, wird die Breite der Anlagefläche 14 durch zwei seitliche Begrenzungslinien 15 und 16 definiert, die im Bereich ihrer sich in Längsrichtung gegenüberliegenden Endabschnitte eine ebene Kontur aufweisen. Zwischen diesen Endabschnitten befindet sich der eigentliche Schneidbereich, in dem die Anlagefläche 14 des Obermessers 9 durch miteinander verbundene Stege 17 gebildet ist, die mäander-, sinus- bzw. schlangenlinienförmig verlaufen.As can be seen particularly well in FIG. 2, the width of the contact surface 14 is defined by two lateral boundary lines 15 and 16, which have a planar contour in the region of their end sections lying opposite one another in the longitudinal direction. Between these end portions is the actual cutting region in which the contact surface 14 of the upper blade 9 is formed by interconnected webs 17 which meander, sinusoidal or serpentine.

Die Stege 17 besitzen quer verlaufende Abschnitte, die die Schneidkanten 22 bilden, sowie Umkehrpunkte 18, die nach außen weisende größere Radien 19 und innenliegende kleine Radien 20 besitzen. Die großen Radien 19 bilden dabei Kammspitzen, die aufgrund ihrer großen Radien besonders hautfreundlich sind. Die kleinen Radien 20 verbinden die Schneidkanten 22 und sind mindestens so groß gemessen, daß sie den Radius eines Haares übersteigen. Auf die Weise ist sichergestellt, daß zwischen den Schneidkanten 22 gefangene Haare nicht geklemmt und damit gezogen werden können.The webs 17 have transverse portions which form the cutting edges 22, as well as turning points 18, which have outwardly facing larger radii 19 and inner small radii 20. The large radii 19 form comb tips, which are particularly skin-friendly due to their large radii. The small radii 20 connect the cutting edges 22 and are at least as large as to exceed the radius of a hair. In this way it is ensured that trapped between the cutting edges 22 hair can not be clamped and thus pulled.

Während bei dem vorbekannten Scherkopf der Außenradius der querverlaufenden kammartigen Stege maximal das Maß der halben Stegbreite erreicht, kann der maximale Außenradius 19 bei dem erfindungsgemäßen Scherkopf so groß wie die gesamte Stegbreite plus die halbe Schlitzbreite ausgeführt werden.While in the prior art shaving head, the outer radius of the transverse comb-like ridges reaches a maximum of half the bridge width, the maximum outer radius 19 in the shaving head according to the invention can be performed as large as the entire land width plus half the slit width.

An einigen Umkehrpunkten 18 geht der Außenradius 19 abrupt in einen rechten Winkel über; an diesen Stellen 23 erfolgt eine Verschweißung des Wandelementes 13 mit den angeformten Stützen 24 der Seitenwände 12. Die durch den rechten Winkel an der Stelle 23 gebildete Anlagefläche dient der Justierung und dem Fixieren in dem Schweißapparat. Selbstverständlich kann die Erfindung auch ohne diese Ecken an den Stellen 23 ausgeführt werden, so daß dann sämtliche Umkehrpunkte große Radien 19 an den Kammspitzen aufweisen.At some reversal points 18, the outer radius 19 abruptly changes to a right angle; At these points 23 there is a welding of the wall element 13 with the integrally formed supports 24 of the side walls 12. The bearing surface formed by the right angle at the point 23 is used for adjustment and fixing in the welding apparatus. Of course, the invention can be carried out without these corners at the points 23, so that then all reversal points have large radii 19 at the comb tips.

Die Radien 19 bilden darüber hinaus trichterförmige Einfädelzonen für die Schlitze 21, welche sich nach außen hin erweitern.The radii 19 also form funnel-shaped Einfädelzonen for the slots 21, which expand outward.

Die mäanderförmigen Stege 17 mit ihren bogenförmigen Umlenkpunkten 18, an welchen sie zum Teil über die Stützen 24 mit den Seitenwänden 12 verbunden sind, stellen insgesamt eine vergleichsweise elastische Anlagefläche 14 für die zu rasierende Haut dar. Diese kann sich zumindest in geringem Maße an Hautkonturen anpassen und ggf. Unebenheiten leichter ausweichen als vorbekannte Scherköpfe. Trotzdem ist selbst bei einer Verformung der Anlagefläche 14 im Bereich der Schneidzone sichergestellt, daß kein Verhaken mit den Stegen 11 des Untermessers 1 erfolgen kann. Aus diesem Grund ist nicht nur die Teilung der Stege 17 des Obermessers 9 eine andere als die Teilung der Stege 11 des Untermessers 1, sondern die Tiefe der Schlitze 21 ist so bemessen, daß sie in montiertem Zustand des Scherkopfes innerhalb des Bereiches enden, der von den Stegen 11 des Untermessers 1 überstrichen wird. Auf diese Weise ist selbst bei einem Verbiegen der Mäander um die Längsachse des Scherkopfes ein Verhaken ausgeschlossen. Dieser überstrichene Bereich, also die Kontaktfläche zwischen dem Obermesser 9 und dem Untermesser 1 ist in Fig. 2 durch die Markierungen 25 und 26 angedeutet. Diese Markierungen 25, 26 deuten sozusagen die beiden äußeren Spuren an, über welche sich das Untermesser 1 belastet durch die Andruckfeder 13 am Obermesser 9 abstützt.The meandering webs 17 with their arcuate deflection points 18, to which they are connected in part via the supports 24 with the side walls 12, represent an overall comparatively resilient contact surface 14 for the skin to be shaved. This can be adapted to skin contours at least to a small extent and possibly avoid unevenness easier than previously known shaving heads. Nevertheless, it is ensured even with a deformation of the contact surface 14 in the region of the cutting zone that no hooking can be done with the webs 11 of the lower blade 1. For this reason, not only the pitch of the webs 17 of the upper blade 9 is different from the pitch of the webs 11 of the lower blade 1, but the depth of the slots 21 is dimensioned so that they end in the assembled state of the shaving head within the range of the webs 11 of the lower blade 1 is swept over. In this way, even with a bending of the meander around the longitudinal axis of the shaving head snagging is excluded. This swept area, ie the contact surface between the upper blade 9 and the lower blade 1 is indicated in Fig. 2 by the markings 25 and 26. These markings 25, 26 indicate, so to speak, the two outer tracks, over which the lower blade 1 is loaded by the pressure spring 13 supported on the upper blade 9.

Durch die oben beschriebene Ausgestaltung des Scherkopfes lassen sich zum einen besonders tiefe Schlitze 21 mit entsprechend langen Schneidkanten realisieren, deren Kammspitzen besonders große Außenradien 19 besitzen. Damit lassen sich Scherköpfe aufbauen, die besonders effektiv schneiden, darüber hinaus aber auch eine optimale Hautschonung gewährleisten. By the above-described embodiment of the shaving head, on the one hand, it is possible to realize particularly deep slots 21 with correspondingly long cutting edges whose comb tips have particularly large external radii 19. This can be used to build shaving heads that cut particularly effectively, but also ensure optimal skin care.

Claims (9)

  1. A shaving head for a hair cutting apparatus, with at least one outer cutter (9) and at least one under cutter (1) associated therewith and having cutting edges, said cutters being movable relative to one another by a drive mechanism, with the outer cutter (9) having an engagement surface (14) comprised of bars (17) and slots (21), which slots (21) are open at least towards one of two lateral boundary lines (15, 16) of the engagement surface (14), said boundary lines defining the width of the engagement surface (14), characterized in that said bars (17) are shaped in a meandering, sinusoidal or serpentine configuration extending back and forth across the engagement surface (14) between the two opposite lateral boundary lines (15, 16), with the reversal points (18) of the bars (17) being located in the area of the boundary lines.
  2. The shaving head as claimed in claim 1, characterized in that said two lateral boundary lines (15, 16) are parallels forming the longitudinal sides of the engagement surface (14).
  3. The shaving head as claimed in claim 1, characterized in that said two lateral boundary lines (15, 16) are designed as nesting, in particular concentric circles forming the outer and, respectively, the inner circumference of the engagement surface (14).
  4. The shaving head as claimed in any one of the preceding claims, characterized in that said first and/or said second lateral boundary line (15 and/or 16) protrude beyond the corresponding lateral boundaries of the associated under cutter (1), so that single or several reversal regions (18) of the bars (17) project in comb-like fashion relative to the under cutter (1).
  5. The shaving head as claimed in any one of the preceding claims, characterized in that the width of the slots (21) expands in the opening direction in a funnel-shaped configuration.
  6. The shaving head as claimed in any one of the preceding claims, characterized in that the length of the slots (21) is dimensioned such that the end (20) of the slots (21) opposite the aperture lies within the area (25, 26) swept by the cutting edges of the under cutter (1).
  7. The shaving head as claimed in any one of the preceding claims, characterized in that said slots (21) or bars (17) of the outer cutter (9) are spaced in a manner different from the spacing of the cutting edges of the under cutter (1).
  8. The shaving head as claimed in any one of the preceding claims, characterized in that the relative motion between the outer cutter (9) and the under cutter (1) is an oscillatory linear motion.
  9. The shaving head as claimed in any one of the claims 1 to 8, characterized in that the relative motion between the outer cutter (9) and the under cutter (1) is a rotary motion.
EP02807253A 2002-04-22 2002-11-18 Shearing head for hair clippers Expired - Lifetime EP1497082B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10217985A DE10217985A1 (en) 2002-04-22 2002-04-22 Shaving head for a hair clipper
DE10217985 2002-04-22
PCT/EP2002/012882 WO2003089198A1 (en) 2002-04-22 2002-11-18 Shearing head for hair clippers

Publications (2)

Publication Number Publication Date
EP1497082A1 EP1497082A1 (en) 2005-01-19
EP1497082B1 true EP1497082B1 (en) 2007-10-03

Family

ID=29224664

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Application Number Title Priority Date Filing Date
EP02807253A Expired - Lifetime EP1497082B1 (en) 2002-04-22 2002-11-18 Shearing head for hair clippers

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US (1) US6966116B2 (en)
EP (1) EP1497082B1 (en)
JP (1) JP4226480B2 (en)
CN (1) CN100346944C (en)
AT (1) ATE374677T1 (en)
AU (1) AU2002356617A1 (en)
DE (2) DE10217985A1 (en)
WO (1) WO2003089198A1 (en)

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Also Published As

Publication number Publication date
JP2005523090A (en) 2005-08-04
ATE374677T1 (en) 2007-10-15
WO2003089198A1 (en) 2003-10-30
US6966116B2 (en) 2005-11-22
CN1625459A (en) 2005-06-08
US20050050739A1 (en) 2005-03-10
JP4226480B2 (en) 2009-02-18
DE10217985A1 (en) 2003-11-20
EP1497082A1 (en) 2005-01-19
CN100346944C (en) 2007-11-07
AU2002356617A1 (en) 2003-11-03
DE50211024D1 (en) 2007-11-15

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