EP2346651A1 - Cutting head for a razor - Google Patents

Cutting head for a razor

Info

Publication number
EP2346651A1
EP2346651A1 EP09778278A EP09778278A EP2346651A1 EP 2346651 A1 EP2346651 A1 EP 2346651A1 EP 09778278 A EP09778278 A EP 09778278A EP 09778278 A EP09778278 A EP 09778278A EP 2346651 A1 EP2346651 A1 EP 2346651A1
Authority
EP
European Patent Office
Prior art keywords
shaving head
head according
contact surface
webs
threading
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09778278A
Other languages
German (de)
French (fr)
Other versions
EP2346651B1 (en
Inventor
Reinhold Eichhorn
Andreas Hartmann
Peter Junk
Joachim Krauss
Michael Odemer
Andreas Peter
Thorsten Pohl
Markus Sabisch
Tobias Schwarz
Thomas Verstege
Jürgen Wolf
Christoph Zegula
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braun GmbH
Original Assignee
Braun GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Braun GmbH filed Critical Braun GmbH
Publication of EP2346651A1 publication Critical patent/EP2346651A1/en
Application granted granted Critical
Publication of EP2346651B1 publication Critical patent/EP2346651B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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 razor according to the preamble of claim 1.
  • Such shaving heads are known for example from DE-C 1927032. Through the slits of the upper blade of such shaving heads, the shaved hairs are threaded during the shaving process and shaved off of the lower blade moving relative to the upper blade, which is also provided with slots or else with cutting teeth.
  • Known shaving heads of this type have flat contact surfaces, which adversely affects the ability to thread hair.
  • Another shaving head is known from US 2331274. Although this has a slightly concave contact surface, but the angle enclosed by the two outer radii - due to the inwardly extending bead in each of the two side walls - a significantly obtuse angle. This is disadvantageous for the threading behavior of hair.
  • the slots taper along the contact surface towards the center.
  • the invention is therefore an object of the invention to provide a shaving head of the type specified above, which allows a particularly thorough shave and has a particularly efficient shaving performance, while ensuring excellent skin care.
  • a shaving head with the features specified in claim 1.
  • the solution according to the invention is ensured by the concavity of the contact surface and the exposed position of the threading edge associated web ends, so the comb tips, that even difficult to detect hairs threaded into the slots, run there and can not escape until they are cut.
  • the exposed position of the comb tips favors the threading and the concave inner radius of the contact surface ensures that the skin and thus that shaved hair can not lift off the contact surface and thus the slot between the webs.
  • the optimal skin care during shaving it serves that the threading edge is provided with an outer radius. Since this invention includes an angle smaller than 90 °, hair can be excellently threaded during the Rasierzuges over the skin.
  • a preferred embodiment of the invention provides that the measured perpendicular to the contact surface thickness of the webs to the threading edge increases.
  • the greater thickness in the area of the comb tips provides for increased skin protection, since in this exposed area the contact pressure between the shaving head and the skin is highest and therefore in this area the skin can be pushed relatively far into the slots.
  • the increased thickness in this area prevents the skin in the actual shear area, ie in the area in which the upper and lower blades are slidably moved relative to each other and their contact surfaces form the shear zone.
  • the contact surface has two threading edges and increases towards both threading edges.
  • the thickness of the webs measured perpendicular to the contact surface increases towards both threading edges.
  • a further embodiment of the invention provides that the upper and lower blades are driven linearly oscillating to each other and the threading edge is substantially parallel to the direction of oscillation.
  • the groove base of the slots is rounded in an arc shape, it is ensured that during a shaving stroke no hair is trapped in this area and pulled painfully. If the concave contact surface has an inner radius, a harmonious transition from the Einfädelkante can be realized, which favors the concern of the skin during the Rasierzuges.
  • the contact surface is convex relative to an axis perpendicular to the threading edge, whereby the shaving of so-called problem areas such as skin folds or neck areas can be performed more easily and more thoroughly.
  • FIG. 1 shows a shaving head according to the invention in a perspective view
  • Fig. 2 a shaving head according to. 1 in cross section as a perspective view
  • FIG. 4 is an enlarged view of the top view of a shaving head according to the invention or its contact surface formed by webs,
  • Fig. 5 in an enlarged view a side view of a shaving head according to the invention.
  • Fig. 6 also enlarges a perspective view of the shaving head according to the invention.
  • the shaving head shown in Fig. 1 can either be used as a single shear element of a shaver or be part of a multiple shear system, as is known for example from DE-C 4312060. In particular, it is used within a triple-shear system, and is used as a central cutter, which is arranged between two foil shear elements.
  • the lateral wall portion 2 of the upper blade 1 has a plurality of openings 3.
  • the upwardly facing in Fig. 1 surface of the substantially bar-shaped running shaving head forms the contact surface 4, which is formed by a plurality of transversely extending Q webs, which are separated from each other by slits 9.
  • a lower blade 7 is arranged, which is provided in the contact area with the upper blade 1 with a plurality of transversely extending Q tines 8, which form the cutting edges of the shaving head in a conventional manner together with the associated edges of the webs 5.
  • the lower blade 7 has at its lower Ab- 9 cut a receptacle 10 for engagement of a drive element which drives the lower blade 7 oscillating in the direction of the longitudinal axis L.
  • the embodiment of the shaving head according to the invention shown in the figures is symmetrical with respect to the longitudinal and transverse center axes Q and L and has a total of two mutually parallel contact surfaces 4, which are each assigned a series of tines 8 and wherein the tines 8 of the two by 90 ° opposite to the support wall 11 bent tine rows are each facing away from each other to the outside.
  • Each of the two contact surfaces 4 is thus assigned to one of two parallel zueinender shear systems 20, 21, wherein each shear system in turn has one of the row of tines 8.
  • the lower blade is biased by drawing spring, not shown, in a conventional manner elastically against the upper blade.
  • upper and lower blades 1 and 7 are always under bias in sliding contact with each other during operation.
  • the shaving head is advanced in the transverse direction Q, whereby the hair to be shaved in the region of the threading edge 12, which runs parallel to the longitudinal axis L, are threaded into the slots 6 between the webs 5.
  • these hairs are then guided in the slots 6 the cutting area, ie the area in which the lower blade 6 is in contact with the webs 5 of the upper blade 1, fed there and by mutually associated cutting edges of the webs 5 and the tines 9 sheared off.
  • the contact surface 4 has a contour which is concave in cross-section Q.
  • the upper boundary plane 13 which is defined by the maximum height of the upper blade 1 in the region of the threading edge 12, it falls inwardly along an inner radius 14 in height.
  • the measured perpendicular to the contact surface 4 thickness of the webs 5 from the maximum thickness in the threading edge 12 is reduced to a minimum thickness in the cutting area, ie the contact area between the upper and lower blade on which the hair is cut.
  • This reduction H is between 0.01 mm and 1, 0 mm.
  • the webs In the region of the threading edge 12, the webs have an outer radius 15 which is approximately 0.01 mm to a maximum of 0.5 mm.
  • the outer radius 15 connects the concave bearing surface 4 with the vertically extending side wall portion 2.
  • the outer radius 15 includes an acute angle, ie less than 90 °, which at the intersection of the parallels to the vertically extending side wall portion 2 and a tangent to the concave contact surface. 4 in the transition region between this and the outer radius 15 is measured. Through these tips, the contact pressure in the region of the outer radius 15 is increased when pressed against the skin during a Rasierzuges and it is formed in conjunction with the relative movement to the skin, a skin ridge that is able to lift the rearing hair and thereby favors the threading into the slot or supported.
  • the total height 16 of the Einfädelschlitze measured in the side wall portion 2 is about 1 mm, thereby hair can thread up to this length, without being tilted during Einfädeins. They then no longer tend to escape from the slot during subsequent guidance to the actual shearing point.
  • the pitch of the upper blade 1, i. the distance T between two ridge center lines 16 is about 0.55 mm. This results in a very delicate shear system.
  • the web width 17 is about 0.25 mm, resulting in a slot width 18 of about 0.30 mm results. This narrow slot width 18 prevents skin from being threaded and possibly cut or at least irritated.
  • the small web width 17 prevents the transfer of hair during the advancing movement of the shaving head on the skin without threading it and then cut; It thus prevents the so-called "flat ironing" and running over of hair.
  • the slit / web width ratio of 0.3 to 0.25 in favor of the slit width guarantees an optimal threading of hair.
  • the web thickness is at the thinnest point S (see FIG. 3) in the cutting area about 0.06 mm. As a result, hair can not only be shortened but also shaved particularly thoroughly.
  • the slots 6 and thus also the webs 5 can be perpendicular to the threading edge 12 (see FIG. 6), but they can also, as shown in Fig. 4, a slope of a few degrees, in particular from 2 ° - 10 ° to the threading edge 12 have. This improves the running properties of an associated lower blade 7, whose cutting edges are perpendicular to the direction of oscillation.
  • the contact surface (4) is convex in relation to the transverse center axis (Q) running perpendicular to the threading edge (12).
  • Fig. 5 illustrates that the slots 6, along the contact surface 4 is a constant slot width 18 of about 0.30 mm, along the lateral wall portion 2 to a slightly smaller dimension 22 of 0.23 mm to the groove bottom 19 tapers.
  • Fig. 6 it can be seen very clearly that the webs 5 are formed along its extension perpendicular to the threading edge 12, so its course parallel to the transverse extent Q, rounded.
  • the rounding is carried out almost continuously with a radius R1 of 0.08 mm, only in the region of the thinner web thickness S, the rounding is provided with a smaller radius R2 of 0.04 mm.
  • Fig. 5 can be taken that the groove bottom 19 is rounded by means of the radius R of 0.1 mm.

Landscapes

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

Abstract

The invention relates to a cutting head for a razor, comprising at least one upper blade (1) and a lower blade (7) associated with said upper blade. The upper blade (1) and lower blade (7) are mounted so as to be movable relative to each other and can be driven accordingly by a drive device. The upper blade (1) comprises a contact surface (4) for the skin to be shaved, said surface being formed by a plurality of webs (5), which are each bounded by slots (6). The longitudinal extension of the webs (5) runs substantially perpendicular to a threading edge (12) bounding the contact surface (4). The contact surface (4) is designed concave and ascends toward the threading edge (12).

Description

Scherkopf für einen Rasierapparat Shaving head for a razor
Die Erfindung betrifft einen Scherkopf für einen Rasierapparat nach dem Oberbegriff des Patentanspruches 1.The invention relates to a shaving head for a razor according to the preamble of claim 1.
Derartige Scherköpfe sind beispielsweise aus der DE-C 1927032 bekannt. Durch die Schlitze der Obermesser solcher Scherköpfe werden während des Rasiervorganges die abzuscherenden Haare eingefädelt und von dem sich relativ zum Obermesser bewegenden Untermesser, welches ebenfalls mit Schlitzen oder aber auch mit Schneidzähnen versehen ist, abgeschert. Bekannte Scherköpfe dieser Art besitzen ebene Anlageflächen, was sich nachteilig auf die Fähigkeit, Haare einzufädeln, auswirkt. Ein weiterer Scherkopf ist aus der US 2331274 bekannt. Dieser besitzt zwar eine leicht konkav ausgebildete Anlagefläche, jedoch ist der von den beiden Außenradien eingeschlossene Winkel - bedingt durch die nach innen verlaufende Sicke in jeder der beiden Seitenwänden - ein deutlich stumpfer Winkel. Dies ist für das Einfädelverhalten von Haaren nachteilig. Des Weiteren verjüngen sich die Schlitze entlang der Anlagefläche zur Mitte hin. Dies führt während eines Rasierzuges leicht zum Einklemmen eines Barthaares und zu dessen Herausreißen. Zum gleichen nachteiligen Effekt führt die spitzwinklige Ausgestaltung des Nutgrundes der Schlitze in den Seitenwänden, da auch hier sehr leicht unerwünscht Haare eingeklemmt und gezupft werden können, was zu Hautirritationen und damit nachteilig bezüglich der Hautschonung ist.Such shaving heads are known for example from DE-C 1927032. Through the slits of the upper blade of such shaving heads, the shaved hairs are threaded during the shaving process and shaved off of the lower blade moving relative to the upper blade, which is also provided with slots or else with cutting teeth. Known shaving heads of this type have flat contact surfaces, which adversely affects the ability to thread hair. Another shaving head is known from US 2331274. Although this has a slightly concave contact surface, but the angle enclosed by the two outer radii - due to the inwardly extending bead in each of the two side walls - a significantly obtuse angle. This is disadvantageous for the threading behavior of hair. Furthermore, the slots taper along the contact surface towards the center. This leads during a Rasierzuges easy to pinching a beard hair and its tearing out. At the same disadvantageous effect leads the acute-angled design of the groove bottom of the slots in the side walls, as well as easily undesirable hair can be pinched and plucked, which is a skin irritation and thus detrimental to the skin.
Es sind weiterhin auch der Einfädelkante vorgelagerte Einfädelmittel und auch die Stege verlängernde Einfädelzinken bekannt, jedoch hat es sich gezeigt, daß Haare, die durch diese Mittel einmal eingefädelt sind, meist wieder aus dem Einfädelschlitz entweichen, wodurch sie nicht geschnitten werden können. Dies wirkt sich nachteilig auf die Rasierleistung aus, d.h. entweder geht die Gründlichkeit der Rasur deutlich zurück bzw. es müssen wesentlich mehr Rasierzüge ausgeführt werden, um zu einem guten Rasierergebnis zu gelangen.There are also the Einfädelkante upstream threading and also the webs extending Einfädelzinken known, however, it has been shown that hair that are threaded through these means, usually escape again from the Einfädelschlitz, so they can not be cut. This has a detrimental effect on shaving performance, i. Either the thoroughness of the shave is significantly reduced or considerably more shaving movements have to be carried out in order to achieve a good shaving result.
Der Erfindung liegt daher die Aufgabe zugrunde, einen Scherkopf der oben angegebenen Art zu schaffen, der eine besonders gründliche Rasur ermöglicht und eine besonders effiziente Rasierleistung besitzt, dabei aber eine hervorragende Hautschonung gewährleistet.The invention is therefore an object of the invention to provide a shaving head of the type specified above, which allows a particularly thorough shave and has a particularly efficient shaving performance, while ensuring excellent skin care.
Diese Aufgabe wird durch einen Scherkopf mit den im Anspruch 1 angegebenen Merkmalen gelöst. Durch die erfindungsgemäße Lösung wird durch die Konkavheit der Anlagefläche und der exponierten Lage der der Einfädelkante zugeordneten Stegenden, also der Kammspitzen, sichergestellt, daß auch schwer zu erfassende Haare in die Schlitze eingefädelt, dort geführt werden und nicht entweichen können bis sie geschnitten sind. Dabei begünstigt die exponierte Lage der Kammspitzen das Einfädeln und der konkave Innenradius der Anlagefläche stellt sicher, daß die Haut und damit daß zu rasierende Haar nicht von der Anlagefläche und damit vom Schlitz zwischen den Stegen abheben kann. Der optimalen Hautschonung während des Rasiervorganges dient es, daß die Einfädelkante mit einem Außenradius versehen ist. Da dieser erfindungsgemäß einen Winkel kleiner 90° einschließt, können während des Rasierzuges über die Haut Haare hervorragend eingefädelt werden.This object is achieved by a shaving head with the features specified in claim 1. By the solution according to the invention is ensured by the concavity of the contact surface and the exposed position of the threading edge associated web ends, so the comb tips, that even difficult to detect hairs threaded into the slots, run there and can not escape until they are cut. In this case, the exposed position of the comb tips favors the threading and the concave inner radius of the contact surface ensures that the skin and thus that shaved hair can not lift off the contact surface and thus the slot between the webs. The optimal skin care during shaving it serves that the threading edge is provided with an outer radius. Since this invention includes an angle smaller than 90 °, hair can be excellently threaded during the Rasierzuges over the skin.
Eine bevorzugte Ausführung der Erfindung sieht vor, daß die senkrecht zur Anlagefläche gemessene Dicke der Stege zur Einfädelkante hin ansteigt. Die größere Dicke im Bereich der Kammspitzen sorgt für eine erhöhte Hautschonung, da in diesem exponierten Bereich der Anpreßdruck zwischen Scherkopf und Haut am höchsten ist und daher in diesem Bereich die Haut relativ weit in die Schlitze hineingedrückt werden kann. Die erhöhte Dicke in diesem Bereich verhindert, daß die Haut in den eigentlichen Scherbereich, also in den Bereich, in welchem das Ober- und Untermesser aneinander gleitend relativ zueinander bewegt sind und deren Kontaktflächen die Scherzone bilden. Vorzugsweise besitzt die Anlagefläche zwei Einfädelkanten und steigt zu beiden Einfädelkanten hin an. Insbesondere steigt auch bei dieser Ausführungsform die senkrecht zur Anlagefläche gemessene Dicke der Stege zu beiden Einfädelkanten hin an.A preferred embodiment of the invention provides that the measured perpendicular to the contact surface thickness of the webs to the threading edge increases. The greater thickness in the area of the comb tips provides for increased skin protection, since in this exposed area the contact pressure between the shaving head and the skin is highest and therefore in this area the skin can be pushed relatively far into the slots. The increased thickness in this area prevents the skin in the actual shear area, ie in the area in which the upper and lower blades are slidably moved relative to each other and their contact surfaces form the shear zone. Preferably, the contact surface has two threading edges and increases towards both threading edges. In particular, in this embodiment as well, the thickness of the webs measured perpendicular to the contact surface increases towards both threading edges.
Eine weitere Ausführungsform der Erfindung sieht vor, daß das Ober- und Untermesser linear oszillierend zueinander angetrieben sind und die Einfädelkante im Wesentlichen parallel zur Oszillationsrichtung verläuft.A further embodiment of the invention provides that the upper and lower blades are driven linearly oscillating to each other and the threading edge is substantially parallel to the direction of oscillation.
Ist der Nutgrund der Schlitze bogenförmig gerundet ausgeführt, wird sichergestellt, daß während eines Rasierzuges keine Haare in diesem Bereich eingeklemmt und schmerzhaft gezogen werden. Wenn die konkave Anlagefläche einen Innenradius besitzt, läßt sich ein harmonischer Übergang von der Einfädelkante aus realisieren, der das Anliegen der Haut während des Rasierzuges begünstigt.If the groove base of the slots is rounded in an arc shape, it is ensured that during a shaving stroke no hair is trapped in this area and pulled painfully. If the concave contact surface has an inner radius, a harmonious transition from the Einfädelkante can be realized, which favors the concern of the skin during the Rasierzuges.
Vorteilhafterweise ist die Anlagefläche in Bezug auf eine senkrecht zur Einfädelkante verlaufende Achse konvex ausgeführt, wodurch die Rasur sogenannter Problemzonen wie Hautfalten oder Halsbereiche leichter und gründlicher durchgeführt werden kann.Advantageously, the contact surface is convex relative to an axis perpendicular to the threading edge, whereby the shaving of so-called problem areas such as skin folds or neck areas can be performed more easily and more thoroughly.
Weitere Ziele, Merkmale, Vorteile und Anwendungsmöglichkeiten der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels. Dabei bilden alle beschriebenen oder bildlich dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand vorliegender 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. there all described or illustrated features alone or in any combination form the subject matter of the present invention, also regardless of their combination in the claims or their dependency.
Die Beschreibung folgt anhand der Zeichnung; hierzu zeigtThe description follows from the drawing; this shows
Fig. 1 einen erfindungsgemäßen Scherkopf in perspektivischer Darstellung,1 shows a shaving head according to the invention in a perspective view,
Fig. 2 einen Scherkopf gemäß. Fig. 1 im Querschnitt als perspektivische Darstellung,Fig. 2 a shaving head according to. 1 in cross section as a perspective view,
Fig. 3 ebenfalls einen Querschnitt durch den erfindungsgemäßen Scherkopf,3 also shows a cross section through the shaving head according to the invention,
Fig. 4 in vergrößerter Darstellung die Draufsicht auf einen erfindungsgemäßen Scherkopf bzw. dessen durch Stege gebildete Anlagefläche,4 is an enlarged view of the top view of a shaving head according to the invention or its contact surface formed by webs,
Fig. 5 in vergrößerter Darstellung eine Seitenansicht auf einen erfindungsgemäßen Scherkopf undFig. 5 in an enlarged view a side view of a shaving head according to the invention and
Fig. 6 ebenfalls vergrößert eine perspektivische Darstellung des erfindungsgemäßen Scherkopfes.Fig. 6 also enlarges a perspective view of the shaving head according to the invention.
Der in Fig. 1 dargestellte Scherkopf kann entweder als einziges Scherelement eines Rasierapparates eingesetzt werden oder aber Teil eines Mehrfachschersystems sein, wie es beispielsweise aus der DE-C 4312060 bekannt ist. Insbesondere findet es innerhalb eines Dreifachschersystems Verwendung, und wird als Mittelschneider, welcher zwischen zwei Folien- scherelementen angeordnet ist, eingesetzt. Zur Verbindung mit diesen Folienscherelemen- ten weist der seitliche Wandabschnitt 2 des Obermessers 1 mehrere Durchbrüche 3 auf. Die in Fig. 1 nach oben weisende Fläche des im Wesentlichen balkenförmig ausgeführten Scherkopfs bildet die Anlagefläche 4, die durch eine Vielzahl von in Querrichtung Q verlaufenden Stegen gebildet ist, die voneinander durch Schlitze 9 getrennt sind.The shaving head shown in Fig. 1 can either be used as a single shear element of a shaver or be part of a multiple shear system, as is known for example from DE-C 4312060. In particular, it is used within a triple-shear system, and is used as a central cutter, which is arranged between two foil shear elements. To connect with these Folienscherelemen- th the lateral wall portion 2 of the upper blade 1 has a plurality of openings 3. The upwardly facing in Fig. 1 surface of the substantially bar-shaped running shaving head forms the contact surface 4, which is formed by a plurality of transversely extending Q webs, which are separated from each other by slits 9.
Innerhalb des Obermessers 1 ist ein Untermesser 7 angeordnet, das im Kontaktbereich mit dem Obermesser 1 mit einer Vielzahl von in Querrichtung Q verlaufenden Zinken 8 versehen ist, die in an sich bekannter Weise zusammen mit den zugeordneten Kanten der Stege 5 die Schneidkanten des Scherkopfes bilden. Das Untermesser 7 weist an seinem unteren Ab- schnitt 9 eine Aufnahme 10 zum Eingriff eines Antriebselementes auf, welches das Untermesser 7 oszillierend in Richtung der Längsachse L antreibt.Within the upper blade 1, a lower blade 7 is arranged, which is provided in the contact area with the upper blade 1 with a plurality of transversely extending Q tines 8, which form the cutting edges of the shaving head in a conventional manner together with the associated edges of the webs 5. The lower blade 7 has at its lower Ab- 9 cut a receptacle 10 for engagement of a drive element which drives the lower blade 7 oscillating in the direction of the longitudinal axis L.
Die in den Figuren dargestellte Ausführungsform des erfindungsgemäßen Scherkopfes ist bezüglich der Längs- und der Quermittelachsen Q und L symmetrisch ausgeführt und besitzt insgesamt zwei parallel zueinander angeordnete Anlageflächen 4, denen jeweils eine Reihe von Zinken 8 zugeordnet sind und wobei die Zinken 8 der beiden um 90° gegenüber der Trägerwand 11 abgekröpften Zinkenreihen jeweils nach außen voneinander abgewandt sind. Jede der beiden Anlageflächen 4 ist somit einem von zwei parallel zueinender liegenden Schersystemen 20, 21 zugeordnet, wobei jedes Schersystem wiederum eine der Reihe von Zinken 8 aufweist. Das Untermesser wird durch zeichnerisch nicht dargestellte Federmittel in an sich bekannter Weise elastisch gegen das Obermesser vorgespannt. Dadurch liegen Ober- und Untermesser 1 bzw. 7 während des Betriebes stets unter Vorspannung in gleitendem Kontakt miteinander.The embodiment of the shaving head according to the invention shown in the figures is symmetrical with respect to the longitudinal and transverse center axes Q and L and has a total of two mutually parallel contact surfaces 4, which are each assigned a series of tines 8 and wherein the tines 8 of the two by 90 ° opposite to the support wall 11 bent tine rows are each facing away from each other to the outside. Each of the two contact surfaces 4 is thus assigned to one of two parallel zueinender shear systems 20, 21, wherein each shear system in turn has one of the row of tines 8. The lower blade is biased by drawing spring, not shown, in a conventional manner elastically against the upper blade. As a result, upper and lower blades 1 and 7 are always under bias in sliding contact with each other during operation.
Zum Durchführen einer Rasur wird der Scherkopf in Querrichtung Q vorgeschoben, wodurch die zu rasierenden Haare im Bereich der Einfädelkante 12, welche parallel zur Längsachse L verläuft, in die Schlitze 6 zwischen den Stegen 5 eingefädelt werden. Während der weiteren Vorschubbewegung des Scherkopfes werden diese Haare dann geführt in den Schlitzen 6 dem Schneidbereich, also dem Bereich, in welchem das Untermesser 6 in Kontakt mit den Stegen 5 des Obermessers 1 steht, zugeführt und dort durch einander zugeordnete Schneidkanten der Stege 5 bzw. der Zinken 9 abgeschert.To perform a shave, the shaving head is advanced in the transverse direction Q, whereby the hair to be shaved in the region of the threading edge 12, which runs parallel to the longitudinal axis L, are threaded into the slots 6 between the webs 5. During the further advancing movement of the shaving head these hairs are then guided in the slots 6 the cutting area, ie the area in which the lower blade 6 is in contact with the webs 5 of the upper blade 1, fed there and by mutually associated cutting edges of the webs 5 and the tines 9 sheared off.
Wie insbesondere der Fig. 3 zu entnehmen ist, besitzt die Anlagefläche 4 eine im Querschnitt Q konkav ausgebildete Kontur. Gegenüber der oberen Begrenzungsebene 13, welche durch die maximale Höhe des Obermessers 1 im Bereich der Einfädelkante 12 definiert ist, fällt sie einwärts entlang einem Innenradius 14 in der Höhe ab. Dabei verringert sich auch die senkrecht zur Anlagefläche 4 gemessene Dicke der Stege 5 von der maximalen Dicke im Bereich der Einfädelkante 12 bis zu einer minimalen Dicke im Schneidbereich, also dem Kontaktbereich zwischen Ober- und Untermesser, an welchem die Haare geschnitten werden. Diese Absenkung H beträgt zwischen 0,01 mm und 1 ,0 mm. Im Bereich der Einfädelkante 12 besitzen die Stege einen Außenradius 15, der in etwa 0,01 mm bis maximal 0,5 mm beträgt. Der Außenradius 15 verbindet die konkave Anlagefläche 4 mit dem vertikal verlaufenden seitlichen Wandabschnitt 2. Dabei schließt der Außenradius 15 einen spitzen Winkel, also kleiner 90° ein, welcher im Schnittpunkt der Parallelen zum vertikal verlaufenden seitlichen Wandabschnitt 2 und einer Tangente an die konkave Anlagefläche 4 im Ü- bergangsbereich zwischen dieser und dem Außenradius 15 gemessen wird. Durch diesen spitzen wird beim Andrücken an die Haut während eines Rasierzuges der Anpressdruck im Bereich des Außenradius 15 erhöht und es wird in Verbindung mit der Relativbewegung zur Haut ein Hautwulst gebildet, der das zurasierende Haar abzuheben vermag und dadurch das Einfädeln in den Schlitz begünstigt bzw. unterstützt.As can be seen in particular from FIG. 3, the contact surface 4 has a contour which is concave in cross-section Q. Compared to the upper boundary plane 13, which is defined by the maximum height of the upper blade 1 in the region of the threading edge 12, it falls inwardly along an inner radius 14 in height. In this case, the measured perpendicular to the contact surface 4 thickness of the webs 5 from the maximum thickness in the threading edge 12 is reduced to a minimum thickness in the cutting area, ie the contact area between the upper and lower blade on which the hair is cut. This reduction H is between 0.01 mm and 1, 0 mm. In the region of the threading edge 12, the webs have an outer radius 15 which is approximately 0.01 mm to a maximum of 0.5 mm. The outer radius 15 connects the concave bearing surface 4 with the vertically extending side wall portion 2. In this case, the outer radius 15 includes an acute angle, ie less than 90 °, which at the intersection of the parallels to the vertically extending side wall portion 2 and a tangent to the concave contact surface. 4 in the transition region between this and the outer radius 15 is measured. Through these tips, the contact pressure in the region of the outer radius 15 is increased when pressed against the skin during a Rasierzuges and it is formed in conjunction with the relative movement to the skin, a skin ridge that is able to lift the rearing hair and thereby favors the threading into the slot or supported.
Die Gesamthöhe 16 der Einfädelschlitze gemessen in dem seitlichen Wandabschnitt 2 beträgt ca. 1 mm, dadurch lassen sich Haare bis zu dieser Länge einfädeln, ohne dass sie während des Einfädeins schräggestellt werden. Sie neigen dann beim anschließenden Führen zur eigentliche Scherstelle nicht mehr dazu, aus dem Schlitz zu entweichen.The total height 16 of the Einfädelschlitze measured in the side wall portion 2 is about 1 mm, thereby hair can thread up to this length, without being tilted during Einfädeins. They then no longer tend to escape from the slot during subsequent guidance to the actual shearing point.
Die Teilung des Obermessers 1 , d.h. der Abstand T zwischen zwei Stegmittellinien 16 beträgt etwa 0,55 mm. Dadurch ergibt sich ein sehr feingliedriges Schersystem. Die Stegbreite 17 beträgt etwa 0,25 mm, wodurch sich eine Schlitzbreite 18 von in etwa 0,30 mm ergibt. Diese schmale Schlitzbreite 18 verhindert, dass Haut eingefädelt und eventuell geschnitten oder zumindest irritiert werden kann. Die geringe Stegbreite 17 verhindert das Umlegen der Haare während der Vorschubbewegung des Scherkopfes auf der Haut ohne diese dabei einzufädeln und anschließend zu schneiden; es verhindert also das sogenannte „flachbügeln" und überfahren von Haaren. Das Schlitz-/ Stegbreitenverhältniss von 0,3 zu 0,25 zu Gunsten der Schlitzbreite garantiert ein optimales Einfädeln von Haaren.The pitch of the upper blade 1, i. the distance T between two ridge center lines 16 is about 0.55 mm. This results in a very delicate shear system. The web width 17 is about 0.25 mm, resulting in a slot width 18 of about 0.30 mm results. This narrow slot width 18 prevents skin from being threaded and possibly cut or at least irritated. The small web width 17 prevents the transfer of hair during the advancing movement of the shaving head on the skin without threading it and then cut; It thus prevents the so-called "flat ironing" and running over of hair.The slit / web width ratio of 0.3 to 0.25 in favor of the slit width guarantees an optimal threading of hair.
Die Stegdicke beträgt an der dünnsten Stelle S (siehe Fig. 3) im Schneidbereich etwa 0,06 mm. Dadurch lassen sich Haare nicht nur vorkürzen, sondern auch besonders gründlich ausrasieren.The web thickness is at the thinnest point S (see FIG. 3) in the cutting area about 0.06 mm. As a result, hair can not only be shortened but also shaved particularly thoroughly.
Wie in der Fig. 4 gezeigt, sind die beiden parallel zueinender liegenden Schersysteme 20, 21 gegeneinander in Längsrichtung L um eine halbe Teilung T, also um etwa 0,275 mm versetzt angeordnet. Dies hat zur Folge, dass Haare, die während eines Rasierzuges genau im Bereich eines der Stege 5 lagen und nicht eingefädelt und geschnitten werden konnten auf Grund des Versatzes in der Überdeckung durch die Stege vom nachfolgenden, also in Zugrichtung zweiten, Schersystem 20 oder 21 - je nach Zugrichtung - eingefädelt werden können, da in auch in Quer- oder Zugrichtung Q gesehen jedem Steg 5 ein Schlitz 6 folgt. Somit verdoppelt sich Bei der Anordnung von zwei Schersysteme 20, 21 versetzt hintereinander die Chance des Scherkopfes, ein Haar einzufädeln, zuführen und zu schneiden. Die Schlitze 6 und damit auch die Stege 5 können senkrecht zur Einfädelkante 12 verlaufen (siehe Fig. 6), sie können jedoch auch, wie in Fig. 4 dargestellt ist, eine Neigung von wenigen Grad, insbesondere von 2°- 10° zur Einfädelkante 12 besitzen. Dies verbessert die Laufeigenschaften eine zugeordneten Untermessers 7, dessen Schneidkanten senkrecht zur Oszillationsrichtung verlaufen.As shown in Fig. 4, the two parallel zueinender lying shear systems 20, 21 against each other in the longitudinal direction L by a half pitch T, that is offset by about 0.275 mm. The consequence of this is that hair which lay exactly in the region of one of the webs 5 during a shaving stroke and could not be threaded and cut due to the offset in the overlap by the webs from the following, ie in the pulling direction second, shear system 20 or 21. Depending on the pulling direction - can be threaded, as seen in each transverse or pulling direction Q each ridge 5, a slot 6 follows. Thus, in the arrangement of two shear systems 20, 21 successively doubled the chance of the shaving head to thread a hair, feed and cut. The slots 6 and thus also the webs 5 can be perpendicular to the threading edge 12 (see FIG. 6), but they can also, as shown in Fig. 4, a slope of a few degrees, in particular from 2 ° - 10 ° to the threading edge 12 have. This improves the running properties of an associated lower blade 7, whose cutting edges are perpendicular to the direction of oscillation.
Wie der Fig. 1 zu entnehmen ist, ist die Anlagefläche (4) in Bezug auf die senkrecht zur Einfädelkante (12) verlaufende Quermittelachse (Q) konvex ausgeführt.As can be seen from FIG. 1, the contact surface (4) is convex in relation to the transverse center axis (Q) running perpendicular to the threading edge (12).
Fig. 5 verdeutlicht, daß die Schlitze 6, die entlang der Anlagefläche 4 eine konstante Schlitzbreite 18 von etwa 0,30 mm beträgt, sich entlang des seitlichen Wandabschnittes 2 auf ein etwas geringeres Maß 22 von 0,23 mm zum Nutgrund 19 hin verjüngt.Fig. 5 illustrates that the slots 6, along the contact surface 4 is a constant slot width 18 of about 0.30 mm, along the lateral wall portion 2 to a slightly smaller dimension 22 of 0.23 mm to the groove bottom 19 tapers.
In Fig. 6 ist sehr deutlich zu erkennen, daß die Stege 5 entlang ihrer Erstreckung senkrecht zur Einfädelkante 12, also ihres Verlaufes parallel zur Quererstreckung Q, abgerundet ausgebildet sind. Die Abrundung ist fast durchgängig mit einem Radius R1 von 0,08 mm ausgeführt, lediglich im Bereich der dünsten Stegdicke S ist die Abrundung mit einem kleineren Radius R2 von 0,04 mm vorgesehen. Insbesondere Fig. 5 ist entnehmbar, daß der Nutgrund 19 mittels des Radius R von 0,1 mm abgerundet ist. Diese Abrundungen sowie die entlang der Anlagefläche 4 konstante Schlitzbreite 18 und die Abrundung des Nutgrundes 19 verringern deutlich das Risiko, daß während des Rasierzuges Haare gezupft werden. In Fig. 6 it can be seen very clearly that the webs 5 are formed along its extension perpendicular to the threading edge 12, so its course parallel to the transverse extent Q, rounded. The rounding is carried out almost continuously with a radius R1 of 0.08 mm, only in the region of the thinner web thickness S, the rounding is provided with a smaller radius R2 of 0.04 mm. In particular, Fig. 5 can be taken that the groove bottom 19 is rounded by means of the radius R of 0.1 mm. These rounding as well as along the contact surface 4 constant slot width 18 and the rounding of the groove bottom 19 significantly reduce the risk that hair will be plucked during the Rasierzuges.

Claims

Patentansprüche: claims:
1. Scherkopf für einen Rasierapparat mit wenigstens einem Obermesser (1 ) und einem diesem zugeordneten Untermesser (7), welche relativ zueinander bewegbar gelagert und von einer Antriebseinrichtung entsprechend antreibbar sind, wobei das Obermesser (1 ) eine Anlagefläche (4) für die zu rasierende Haut aufweist, die durch eine Vielzahl von jeweils durch Schlitze (6) begrenzten Stegen (5) gebildet ist und die Längserstreckung der Stege (5) im wesentlichen senkrecht zu einer die Anlagefläche (4) begrenzenden Einfädelkante (12) verläuft, die Anlagefläche (4) konkav ausgebildet ist und zur Einfädelkante (12) hin ansteigt, dadurch gekennzeichnet, daß die Einfädelkante (12) einen Außenradius (15) aufweist und dieser Außenradius (15) einen Winkel (W) kleiner 90° einschließt.1. shaving head for a razor with at least one upper blade (1) and a lower blade (7) associated therewith, which are mounted relative to each other movable and drivable by a drive means, wherein the upper blade (1) has a contact surface (4) for shaving Skin, which is formed by a plurality of respectively by slots (6) limited webs (5) and the longitudinal extent of the webs (5) substantially perpendicular to the contact surface (4) delimiting threading edge (12), the contact surface (4 ) is concave and rises to the threading edge (12), characterized in that the threading edge (12) has an outer radius (15) and this outer radius (15) forms an angle (W) of less than 90 °.
2. Scherkopf nach Anspruch 1 , dadurch gekennzeichnet, daß die senkrecht zur Anlagefläche gemessene Dicke der Stege (5) zur Einfädelkante (12) hin ansteigt.2. shaving head according to claim 1, characterized in that the measured perpendicular to the contact surface thickness of the webs (5) to the threading edge (12) increases.
3. Scherkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Anlagefläche (4) zwei Einfädelkanten aufweist und zu beiden Einfädelkanten (12) hin ansteigt.3. shaving head according to one of the preceding claims, characterized in that the abutment surface (4) has two threading edges and to both threading edges (12) increases towards.
4. Scherkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die senkrecht zur Anlagefläche (4) gemessene Dicke der Stege (5) zu beiden Einfädelkanten (12) hin ansteigt.4. shaving head according to one of the preceding claims, characterized in that the perpendicular to the contact surface (4) measured thickness of the webs (5) to both Einfädelkanten (12) increases.
5. Scherkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Ober- und Untermesser (1 , 7) linear oszillierend zueinander angetrieben sind und die Einfädelkante (12) im wesentlichen parallel zur Oszillationsrichtung verläuft.5. shaving head according to one of the preceding claims, characterized in that the upper and lower blades (1, 7) are driven linearly oscillating to each other and the threading edge (12) extends substantially parallel to the direction of oscillation.
6. Scherkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Nutgrund (19) der Schlitze (6) bogenförmig mittels mindestens eines Radius (R) gerundet ausgeführt ist.6. shaving head according to one of the preceding claims, characterized in that the groove bottom (19) of the slots (6) arcuately executed by means of at least one radius (R) is rounded.
7. Scherkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die konkave Anlagefläche (4) einen Innenradius (14) besitzt. 7. shaving head according to one of the preceding claims, characterized in that the concave bearing surface (4) has an inner radius (14).
8. Scherkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Anlagefläche (4) in Bezug auf eine senkrecht zur Einfädelkante (12) verlaufende Achse (Q) konvex ausgeführt ist.8. shaving head according to one of the preceding claims, characterized in that the bearing surface (4) with respect to a perpendicular to the threading edge (12) extending axis (Q) is convex.
9. Scherkopf nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens zwei Schersysteme (20, 21 ) parallel zu einander und zur Längsachse (L) liegend zugesehen sind.9. shaving head according to one of the preceding claims, characterized in that at least two shear systems (20, 21) parallel to each other and to the longitudinal axis (L) are lying down.
10. Scherkopf nach Anspruch 9, dadurch gekennzeichnet, daß die Schersysteme (20, 21 ) entlang der Längsachse (L), insbesondere um die Hälfte der Teilung (T) des O- bermessers, gegeneinander versetzt sind. 10. shaving head according to claim 9, characterized in that the shear systems (20, 21) along the longitudinal axis (L), in particular by half of the pitch (T) of the O-bermessers, are offset from each other.
EP09778278A 2008-09-05 2009-09-02 Cutting head for a razor Active EP2346651B1 (en)

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DE102008046072A DE102008046072A1 (en) 2008-09-05 2008-09-05 Shaving head for a razor
PCT/EP2009/006352 WO2010025902A1 (en) 2008-09-05 2009-09-02 Cutting head for a razor

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CN102143829A (en) 2011-08-03
CN102143829B (en) 2013-11-20
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US20110209350A1 (en) 2011-09-01
JP2012501700A (en) 2012-01-26
EP2346651B1 (en) 2013-02-13
WO2010025902A1 (en) 2010-03-11
JP3189610U (en) 2014-03-20

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