EP3784453B1 - Cutting head - Google Patents

Cutting head Download PDF

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Publication number
EP3784453B1
EP3784453B1 EP19723624.3A EP19723624A EP3784453B1 EP 3784453 B1 EP3784453 B1 EP 3784453B1 EP 19723624 A EP19723624 A EP 19723624A EP 3784453 B1 EP3784453 B1 EP 3784453B1
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EP
European Patent Office
Prior art keywords
contact surface
plane
cutting head
prong
free
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EP19723624.3A
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German (de)
French (fr)
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EP3784453A1 (en
Inventor
Mathias Oswald
René Hendler
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Payer International Technologies GmbH
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Payer International Technologies GmbH
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Publication of EP3784453A1 publication Critical patent/EP3784453A1/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
    • B26B19/06—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving co-operating cutting elements both of which have shearing teeth
    • 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 cutting head for a hair clipper with an outer cutter formed by a plurality of ridges and slots between the ridges, which ridges form a contact surface for skin contact and a shearing surface opposite the contact surface, and with a relatively oscillating movement having a plurality of cutting blades lower cutter that can be driven in relation to the upper cutter and is guided in contact with the shearing surface of the upper cutter, wherein at least one of the webs of the upper cutter is designed with a free-standing end in the plane of the contact surface, with a prong different from the upper cutter adjoining the at least one web with a free-standing end.
  • Such a cutting head according to the preamble of claim 1 is from DE 198 22 094 A1 known.
  • a cutting head according to the prior art is, for example, from EP 693 988 B1 become known and represents a modification of the known flat cutting units, which are particularly widely used as a beard trimmer.
  • an undercutter having a plurality of cutting blades is oscillated against an outer cutter having a plurality of ridges and slots formed between the ridges.
  • the upper blade and lower blade can be designed as stamped or etched metal sheets.
  • the upper side of the upper blade together with the large number of bars, functionally forms a contact surface that is brought into contact with the user's skin when shaving, so that whiskers protrude through the slits between the bars and are cut off by the oscillating movement of the lower blade due to the shearing effect between the shearing surface of the be cut off by the upper knife and the cutting blades of the lower knife.
  • the oscillating movement of the lower blade relative to the upper blade takes place with an electric drive, which, by means of a suitable mechanism, converts the rotary movement of an electric motor into an oscillating Movement or a reciprocating movement of the lower blade causes relative to the outer blade with a relatively high frequency. In this way, hair can be cut without risk of injury to the user, even if the user does not take special care in the shaving process with daily use.
  • EP 693 988 B1 proposed to form individual webs of the upper cutter with free ends that extend in the plane of the contact surface.
  • these free ends can act as raising or threading elements for flat or short hair, so that the corresponding hair can also be reliably cut off at the shearing surface of the upper knife by the cutting blades of the lower knife.
  • the object of the present invention is therefore to further improve hair trimmers or beard trimmers with a flat cutting unit with regard to the thoroughness of the shave with regard to capturing problematically short or flat-lying hair with simple design measures to improve.
  • a cutting head of the type mentioned at the outset is therefore further developed according to the invention such that the at least one web with an end that is free in the plane of the contact surface is shortened in the direction of the plane of the contact surface compared to a web with an end that is not free in the plane of the contact surface is, in particular by the length of the extension of the tine.
  • upper cutters for dry shavers or hair clippers with a flat cutting unit are stamped or etched from sheet metal, which represents a way of manufacturing upper cutters and lower cutters that is easy to automate for mass production and is therefore inexpensive.
  • the at least one prong has a tapering tip at its end facing away from the free end of a bar of the outer cutter.
  • a tine with such a tapered tip will most likely slide under flat-lying hair when shaving, for example, and raise it up so that it is subsequently caught by a bar with a free end and in this way protrudes through the upper blade to the lower blade, where they can be cut off.
  • the invention also offers the possibility that the at least one prong can be made of a material that is different from the material of the upper blade, a different material, in particular a material selected from the Group consisting of thermoplastics, elastomers, ceramics, in particular injection molded ceramic (CIM) and metals, in particular injection molded metal (MIM) is formed, as corresponds to a preferred embodiment of the present invention.
  • a suitable material for the tines hair can be gripped and raised better by simply brushing over a flat hair with the tine than is possible with the free-standing metal ends of the ridges of the upper cutter.
  • the at least one prong rises above the plane of the contact surface. This means that the tine protrudes over the upper blade, so that when the contact surface of the upper blade comes into contact with the skin, the tine comes into particularly strong contact with the skin and whiskers, so that the tip of the tine can more easily penetrate under flat lying hair and a possible from Material of the upper blade different material, in particular plastic material of the tine is pressed firmly to short or flat hairs, thereby sticking more strongly to them and when guiding the cutting head over an area to be shaved, the problematic hairs mentioned can stand up better.
  • the cutting head is designed in such a way that the at least one web with an end that is free in the plane of the contact surface is shortened in the direction of the plane of the contact surface, in particular by the length, compared to a web with an end that is not free in the plane of the contact surface the extension of the tine, which offers the possibility of accommodating the tine adjoining the web with a free-standing end essentially within the imaginary width of the upper cutter without the tines, in order to use the cutting head according to the invention with further shaving elements, such as shaving foils, cutters, to be able to combine without having to deviate from existing construction dimensions.
  • This allows the present invention to be implemented inexpensively and directly for a number of products within a product range, without having to significantly change the production of these hair clippers or dry shavers.
  • the at least one prong is movably guided in the longitudinal direction of the upper blade, which can further improve the effect of the prong as a threading or positioning element.
  • the at least one prong is coupled to the movement of the lower cutter in essentially the same way as the lower cutter is coupled to the drive, which is a common measure for those skilled in the art of producing hair clippers, dry shavers and the like.
  • the at least one tine is coupled to the lower cutter for gear reduction via a rocker arm to the lower cutter.
  • the at least one tine oscillates over a shorter distance than the lower blade, and with a suitable dimensioning of the rocker arm and the pivot points it can be ensured that the tine oscillates only within that distance which is defined between webs formed without free-standing ends, so that at least one tine does not collide with the upper blade. This would lead to premature material fatigue both of the at least one prong and of the upper cutter and also result in increased effort on the part of the drive and associated higher power consumption of the hair clipper with a cutting head according to the invention.
  • a plurality of tines with free ends are provided on a cutting head according to the present invention and accordingly also a plurality of tines which connect to the ridges with free ends, it is preferred that a plurality of tines are arranged on a common tine carrier is.
  • the tines originate from a common structural element which extends along the length of the upper cutter, with such a tine carrier being able to be arranged on both sides of the outer cutter if the outer cutter is constructed symmetrically along its longitudinal axis and therefore has webs in the plane of the Contact surface has free ends on both sides.
  • the tine carrier can be coupled to the drive or the lower blade essentially like the lower blade for coupling the movement of the tines, which is easier and cheaper to do with a plurality of tines than to mount and drive the individual tines separately.
  • the webs with an end that is not freestanding in the plane of the contact surface are accordingly bent over into a plane that differs from the plane of the contact surface and are connected to one another in this plane with a longitudinal connector or a longitudinal connector element, which is formed from the upper blade, in order to provide the necessary stability of the upper blade to ensure safe and long-lasting operation.
  • the reference number 1 shows a cutting head of a hair trimmer, such as a beard trimmer or dry shaver.
  • the cutting head 1 is optionally mounted on a handle 3 such that it can be pivoted in the direction of the double arrows 2 and 2 ′, which handle 3 is not components shown, such as power supply, drive and controls.
  • 4 designates shaving foil cutting elements, as they are well known in the prior art and are not a mandatory part of the present invention.
  • the cutting head 1 according to the invention now has an upper blade 5 which is supplemented by tines 11 according to the invention.
  • the outer cutter 5 has a multiplicity of webs 6 , 7 , some of which are in the form of webs 6 with ends 9 which are free in the plane of the contact surface 8 .
  • the webs 6 with free ends 9 are connected by a longitudinal beam 10 to webs 7 with non-free ends.
  • the free-standing ends 9 of the webs 6 are followed by tines 11 different from the outer cutter 5 and running on a common tine carrier 12 on both sides of the outer cutter 5 along the longitudinal extension of the outer cutter 5 .
  • the tines 11 have a more complex geometry than the simple, free-standing ends 9 of the webs 6 and can therefore be optimized for the purpose of raising short whiskers or whiskers lying flat against the skin and feeding them into the slots 13 between the webs 6, 7 what, as already explained above, concerns not only the geometry but also the material of the tines.
  • the webs 7 with an end that is not freestanding in the plane of the contact surface 8 are connected to one another in a plane different from the plane of the contact surface 8 by a longitudinal connector 25 formed in one piece with the outer cutter 5 .
  • the outer cutter 5 is connected via connecting elements 14 to a lower frame 15, in which springs 16 are mounted on a carrier 17 for an in 3 Unrecognizable lower blade 21 (see 4 ) work around that Lower cutter 21 to press against the upper cutter 5, so that the lower cutter 21 is guided on the outer cutter 5, more precisely on its shearing surface, which shearing surface is formed opposite the contact surface 8 on the outer cutter 5.
  • the drive which is not shown, can engage in a groove 18 on the carrier 17 of the inner cutter with appropriate means, so that this is driven to perform an oscillating movement in the direction of the double arrow 19 .
  • the bottom cutter 21 can now also be seen, which has a multiplicity of cutting blades 20 which interact with the webs 6, 7 of the top cutter 5 for cutting hair.
  • tine carriers 12 can be arranged on both sides of the outer cutter 5 in order to carry the tines 11 which connect to webs 6 with a free-standing end 9 .
  • the tines or the tine carrier are coupled to the movement of the lower blade 21 with a driver 22, so that the tine carrier 12 or the tines 11 and lower blade 21 can oscillate in the direction of the double arrow 23, with a suitable configuration of the driver 22 and the tine carrier 12 is also possible to realize an oscillating movement of the tine carrier 12 or the tines 11 in the direction of the double arrow 24 in the form of a segment of a circle.

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

Description

Die Erfindung betrifft einen Schneidkopf für einen Haarschneider mit einem von einer Mehrzahl von Stegen und Schlitzen zwischen den Stegen gebildeten Obermesser, welche Stege eine Anlagefläche zur Hautberührung und eine der Anlagefläche gegenüberliegende Scherfläche ausbilden, sowie mit einem eine Vielzahl von Schneidklingen aufweisenden, zu oszillierender Bewegung relativ zum Obermesser antreibbaren und an der Scherfläche des Obermessers anliegend geführten Untermesser, wobei zumindest einer der Stege des Obermessers mit einem in der Ebene der Anlagefläche freistehenden Ende ausgebildet ist, wobei an den zumindest einen Steg mit freistehendem Ende eine vom Obermesser verschiedene Zinke anschließt.The invention relates to a cutting head for a hair clipper with an outer cutter formed by a plurality of ridges and slots between the ridges, which ridges form a contact surface for skin contact and a shearing surface opposite the contact surface, and with a relatively oscillating movement having a plurality of cutting blades lower cutter that can be driven in relation to the upper cutter and is guided in contact with the shearing surface of the upper cutter, wherein at least one of the webs of the upper cutter is designed with a free-standing end in the plane of the contact surface, with a prong different from the upper cutter adjoining the at least one web with a free-standing end.

Ein solcher Schneidkopf gemäß dem Oberbegriff von Anspruch 1 ist aus der DE 198 22 094 A1 bekannt.Such a cutting head according to the preamble of claim 1 is from DE 198 22 094 A1 known.

Ein Schneidkopf gemäß dem Stand der Technik ist beispielsweise auch aus der EP 693 988 B1 bekannt geworden und stellt eine Abwandlung der bekannten flachen Schneideinheiten dar, die insbesondere als Bartschneider verbreitet Anwendung finden. Bei diesen Schneidköpfen wird ein Untermesser mit einer Vielzahl von Schneidklingen oszillierend gegen ein Obermesser mit einer Vielzahl von Stegen und zwischen den Stegen gebildeten Schlitzen bewegt. Obermesser und Untermesser können hierbei als gestanzte oder geätzte Bleche ausgebildet sein. Die Oberseite des Obermessers bildet mit der Vielzahl der Stege funktional eine Anlagefläche, die beim Rasieren mit der Haut des Anwenders in Kontakt gebracht wird, sodass Barthaare durch die Schlitze zwischen den Stegen hindurchragen und durch die oszillierende Bewegung des Untermessers durch die Scherwirkung zwischen der Scherfläche des Obermessers und den Schneidklingen des Untermessers abgeschnitten werden. Die oszillierende Bewegung des Untermessers relativ zum Obermesser erfolgt mit einem elektrischen Antrieb, der mittels einer geeigneten Mechanik die Rotationsbewegung eines Elektromotors in eine oszillierende Bewegung bzw. eine Hin- und Herbewegung des Untermessers relativ zum Obermesser mit einer relativ hohen Frequenz bewirkt. Auf diese Weise können Haare ohne Verletzungsgefahr für den Anwender geschnitten werden, auch wenn der Anwender bei täglicher Verwendung keine besondere Sorgfalt beim Rasiervorgang walten lässt.A cutting head according to the prior art is, for example, from EP 693 988 B1 become known and represents a modification of the known flat cutting units, which are particularly widely used as a beard trimmer. In these cutting heads, an undercutter having a plurality of cutting blades is oscillated against an outer cutter having a plurality of ridges and slots formed between the ridges. The upper blade and lower blade can be designed as stamped or etched metal sheets. The upper side of the upper blade, together with the large number of bars, functionally forms a contact surface that is brought into contact with the user's skin when shaving, so that whiskers protrude through the slits between the bars and are cut off by the oscillating movement of the lower blade due to the shearing effect between the shearing surface of the be cut off by the upper knife and the cutting blades of the lower knife. The oscillating movement of the lower blade relative to the upper blade takes place with an electric drive, which, by means of a suitable mechanism, converts the rotary movement of an electric motor into an oscillating Movement or a reciprocating movement of the lower blade causes relative to the outer blade with a relatively high frequency. In this way, hair can be cut without risk of injury to the user, even if the user does not take special care in the shaving process with daily use.

Um insbesondere auch kurze Barthaare und Barthaare, die flach an der Haut anliegen, erfassen und in einen Schlitz des Obermessers führen zu können, wird in der genannten EP 693 988 B1 vorgeschlagen, einzelne Stege des Obermessers mit frei stehenden Enden auszubilden, die sich in der Ebene der Anlagefläche erstrecken. Im Gegensatz zu den Stegen, die in eine von der Ebene der Anlagefläche verschiedene Ebene, also in einen Bereich einer Seitenwand des Obermessers umgelenkt werden, können diese frei stehenden Enden als Aufstell- oder Einfädelelemente für flach liegende oder kurze Haare fungieren, sodass die entsprechenden Haare ebenfalls zuverlässig an der Scherfläche des Obermessers von den Schneidklingen des Untermessers abgeschnitten werden können. Dies stellt eine Verbesserung der Gründlichkeit der Rasur mit einem Haarschneider bzw. Trockenrasierapparat mit einer flachen Schneideinheit gegenüber den zuvor bekannten Obermessern dar, die keine frei stehenden Enden der Stege aufweisen.In order in particular to be able to capture short whiskers and whiskers that lie flat against the skin and lead them into a slot of the upper blade, EP 693 988 B1 proposed to form individual webs of the upper cutter with free ends that extend in the plane of the contact surface. In contrast to the webs, which are deflected into a plane that is different from the plane of the contact surface, i.e. into an area of a side wall of the upper cutter, these free ends can act as raising or threading elements for flat or short hair, so that the corresponding hair can also be reliably cut off at the shearing surface of the upper knife by the cutting blades of the lower knife. This represents an improvement in the closeness of a shave with a hair clipper or dry shaver having a flat cutting unit over previously known upper cutters which do not have free ends of the ridges.

Mit steigenden Ansprüchen der Anwender gibt es auf dem Gebiet der Haarschneider, Rasierer und Bartschneider dennoch ein ständiges Bestreben, die Gründlichkeit der Rasur weiter zu steigern. Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, Haarschneider bzw. Bartschneider mit flacher Schneideinheit hinsichtlich der Gründlichkeit der Rasur hinsichtlich des Erfassens von problematisch kurzen bzw. flach liegenden Haaren mit einfachen konstruktiven Maßnahmen weiter zu verbessern.With the increasing demands of the users, there is nevertheless a constant effort in the field of hair clippers, shavers and beard clippers to further increase the thoroughness of the shave. The object of the present invention is therefore to further improve hair trimmers or beard trimmers with a flat cutting unit with regard to the thoroughness of the shave with regard to capturing problematically short or flat-lying hair with simple design measures to improve.

Zur Lösung dieser Aufgabe ist ein Schneidkopf der eingangs genannten Art daher erfindungsgemäß dahingehend weitergebildet, dass der zumindest eine Steg mit in der Ebene der Anlagefläche freistehendem Ende im Vergleich zu einem Steg mit in der Ebene der Anlagefläche nicht freistehendem Ende in Richtung der Ebene der Anlagefläche verkürzt ist, insbesondere um die Länge der Erstreckung der Zinke.To solve this problem, a cutting head of the type mentioned at the outset is therefore further developed according to the invention such that the at least one web with an end that is free in the plane of the contact surface is shortened in the direction of the plane of the contact surface compared to a web with an end that is not free in the plane of the contact surface is, in particular by the length of the extension of the tine.

Wie bereits erwähnt, werden Obermesser für Trockenrasierer bzw. Haarschneider mit flacher Schneideinheit aus Blechen gestanzt oder geätzt, was einen für die Massenproduktion leicht zu automatisierenden und daher kostengünstigen Weg der Herstellung von Obermessern und auch Untermessern darstellt. Für das Aufstellen von besonders kurzen oder flach an der Haut anliegenden Haaren kann es jedoch nützlich sein, nicht nur flache Einfädelelemente bereitzustellen, wie sie aus einem gestanzten oder geätzten Blech gebildet werden können, sondern die Aufstell- bzw. Einfädelelemente, die durch die in der Ebene der Anlagefläche frei stehenden Enden der Stege gebildet sind, durch Einfädel- bzw. Aufstellelemente mit unterschiedlichen Geometrien zu ergänzen. Das gesamte Obermesser auf andere Art herzustellen, um komplexere Geometrien als frei stehende Enden von Stegen zu realisieren, würde jedoch die Herstellungskosten in nicht vertretbarer Weise erhöhen. Gemäß der Erfindung ist es nun aber möglich, vom Obermesser verschiedene Zinken an einen Steg mit frei stehendem Ende anschließend am Schneidkopf anzuordnen, sodass die für die Herstellung des Obermessers bekannten Verfahren weiterhin eingesetzt werden können und verbesserte Einfädel- bzw. Aufstellelemente als separate Zinken gemäß irgend einem anderen geeigneten Verfahren hergestellt und zum Schneidkopf hinzugefügt werden können. Insgesamt resultiert ein Schneidkopf mit flacher Schneideinheit, bei dem Stege mit frei stehenden Enden von einem speziell geformten Einfädel- bzw. Aufstellelement in Form einer Zinke ergänzt werden, sodass eine gründlichere Rasur bei im Wesentlichen gleichbleibenden Produktionskosten erzielt werden kann.As already mentioned, upper cutters for dry shavers or hair clippers with a flat cutting unit are stamped or etched from sheet metal, which represents a way of manufacturing upper cutters and lower cutters that is easy to automate for mass production and is therefore inexpensive. However, for setting up particularly short hair or hair that lies flat against the skin, it can be useful not only to provide flat threading elements, such as can be formed from stamped or etched sheet metal, but also to use the setting up or threading elements that are Level of the contact surface free ends of the webs are formed to supplement by threading or positioning elements with different geometries. Manufacturing the entire outer cutter in a different way, in order to realize more complex geometries than free-standing ends of webs, would increase the manufacturing costs in an unacceptable manner. According to the invention, however, it is now possible to arrange tines different from the upper cutter on a web with a free end on the cutting head, so that the methods known for the production of the upper cutter can continue to be used and improved threading or positioning elements as separate tines according to any manufactured by any other suitable method and added to the cutting head. The overall result is a cutting head with a flat cutting unit, in which webs with free-standing ends are supplemented by a specially shaped threading or positioning element in the form of a prong, so that a closer shave can be achieved with essentially the same production costs.

Zum optimierten Einfädeln und Aufstellen der genannten problematischen Haare kann es gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung vorgesehen sein, dass die zumindest eine Zinke an ihrem vom freistehenden Ende eines Stegs des Obermessers abgewandten Ende eine sich verjüngende Spitze aufweist. Eine Zinke mit einer solchen sich verjüngenden Spitze wird beim Rasieren mit großer Wahrscheinlichkeit unter beispielsweise flach anliegende Haare gleiten und diese aufstellen, sodass sie in der Folge von einem Steg mit frei stehendem Ende erfasst werden und auf diese Weise durch das Obermesser hindurch zum Untermesser ragen, wo sie abgeschnitten werden können.For optimized threading and raising of said problematic hairs it can be provided according to a preferred embodiment of the present invention that the at least one prong has a tapering tip at its end facing away from the free end of a bar of the outer cutter. A tine with such a tapered tip will most likely slide under flat-lying hair when shaving, for example, and raise it up so that it is subsequently caught by a bar with a free end and in this way protrudes through the upper blade to the lower blade, where they can be cut off.

Neben den Vorteilen, die mit verschiedenen Geometrien der Zinke, wie soeben beschrieben, erzielt werden können, bietet die Erfindung darüberhinaus die Möglichkeit, dass die zumindest eine Zinke aus einem vom Material des Obermessers verschiedenen Material, verschiedenen Material, insbesondere aus einem Material ausgewählt aus der Gruppe bestehend aus Thermoplasten, Elastomeren, Keramik, insbesondere spritzgegossene Keramik (CIM) und Metallen, insbesondere spritzgegossenes Metall (MIM) gebildet ist, wie dies einer bevorzugten Ausführungsform der vorliegenden Erfindung entspricht. Durch die geeignete Wahl des Materials für die Zinken können Haare auch beim bloßen Überstreichen beispielsweise eines flach anliegenden Haares mit der Zinke besser ergriffen und aufgestellt werden, als dies mit den frei stehenden metallischen Enden der Stege des Obermessers möglich ist.In addition to the advantages that can be achieved with different geometries of the prongs, as just described, the invention also offers the possibility that the at least one prong can be made of a material that is different from the material of the upper blade, a different material, in particular a material selected from the Group consisting of thermoplastics, elastomers, ceramics, in particular injection molded ceramic (CIM) and metals, in particular injection molded metal (MIM) is formed, as corresponds to a preferred embodiment of the present invention. By choosing a suitable material for the tines, hair can be gripped and raised better by simply brushing over a flat hair with the tine than is possible with the free-standing metal ends of the ridges of the upper cutter.

Zur weiteren Verbesserung der Wirkung der Zinke als Einfädel- bzw. Aufstellelement kann es gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung vorgesehen sein, dass sich die zumindest eine Zinke über die Ebene der Anlagefläche erhebt. Dies bedeutet, dass die Zinke über das Obermesser vorsteht und dadurch bei Hautberührung der Anlagefläche des Obermessers ein besonders kräftiger Kontakt der Zinke mit der Haut und den Barthaaren erzielt wird, sodass die Spitze der Zinke leichter unter flach liegende Haare dringen kann und ein ggf. vom Material des Obermessers verschiedenes Material, insbesondere Kunststoffmaterial der Zinke fest an kurze oder flach liegende Haare gedrückt wird, an diesen dadurch stärker haftet und beim Führen des Schneidkopfes über eine zu rasierende Stelle die genannten problematischen Haare besser aufstellen kann.To further improve the effect of the tine as a threading or positioning element, it can be provided according to a preferred embodiment of the present invention that the at least one prong rises above the plane of the contact surface. This means that the tine protrudes over the upper blade, so that when the contact surface of the upper blade comes into contact with the skin, the tine comes into particularly strong contact with the skin and whiskers, so that the tip of the tine can more easily penetrate under flat lying hair and a possible from Material of the upper blade different material, in particular plastic material of the tine is pressed firmly to short or flat hairs, thereby sticking more strongly to them and when guiding the cutting head over an area to be shaved, the problematic hairs mentioned can stand up better.

Gemäß der vorliegenden Erfindung ist der Schneidkopf dergestalt ausgebildet, dass der zumindest eine Steg mit in der Ebene der Anlagefläche freistehendem Ende im Vergleich zu einem Steg mit in der Ebene der Anlagefläche nicht freistehendem Ende in Richtung der Ebene der Anlagefläche verkürzt ist, insbesondere um die Länge der Erstreckung der Zinke, was die Möglichkeit bietet, die an dem Steg mit frei stehendem Ende anschließende Zinke insgesamt im Wesentlichen innerhalb der gedachten Breite des Obermessers ohne die Zinken unterzubringen, um den erfindungsgemäßen Schneidkopf ggf. mit weiteren Scherelementen, wie z.B. Scherfolien, Schneidern, kombinieren zu können, ohne von bereits bestehenden Konstruktionsmaßen abweichen zu müssen. Dies gestattet es, die vorliegende Erfindung kostengünstig und unmittelbar bei einer Mehrzahl von Produkten innerhalb einer Produktpalette zu verwirklichen, ohne die Produktion dieser Haarschneider bzw. Trockenrasierapparate wesentlich umstellen zu müssen.According to the present invention, the cutting head is designed in such a way that the at least one web with an end that is free in the plane of the contact surface is shortened in the direction of the plane of the contact surface, in particular by the length, compared to a web with an end that is not free in the plane of the contact surface the extension of the tine, which offers the possibility of accommodating the tine adjoining the web with a free-standing end essentially within the imaginary width of the upper cutter without the tines, in order to use the cutting head according to the invention with further shaving elements, such as shaving foils, cutters, to be able to combine without having to deviate from existing construction dimensions. This allows the present invention to be implemented inexpensively and directly for a number of products within a product range, without having to significantly change the production of these hair clippers or dry shavers.

Mit Vorteil ist beim erfindungsgemäßen Schneidkopf die zumindest eine Zinke in Längsrichtung des Obermessers beweglich geführt, was die Wirkung der Zinke als Einfädel- bzw. Aufstellelement weiter verbessern kann. Dies gilt insbesondere dann, wenn die zumindest eine Zinke mit dem Untermesser zu gleichsinniger oder gegensinniger Bewegung gekoppelt ist, insbesondere einer kurvenförmigen Bewegung, insbesondere zumindest kreissegmentförmigen Bewegung quer zur Ebene der Anlagefläche, wie dies einer bevorzugten Ausführungsform der vorliegenden Erfindung entspricht. Die Kopplung der zumindest einen Zinke mit der Bewegung des Untermessers erfolgt dabei in im Wesentlichen gleicher Weise wie die Kopplung des Untermessers an den Antrieb, was für den Fachmann auf dem Gebiet der Herstellung von Haarschneidern, Trockenrasierapparaten und dgl. eine gängige Maßnahme darstellt.Advantageously, in the cutting head according to the invention, the at least one prong is movably guided in the longitudinal direction of the upper blade, which can further improve the effect of the prong as a threading or positioning element. This applies in particular when the at least one tine is coupled to the lower blade for movement in the same direction or in opposite directions, in particular a curved movement, in particular a movement in the shape of a segment of a circle transverse to the plane of the contact surface, as corresponds to a preferred embodiment of the present invention. The at least one prong is coupled to the movement of the lower cutter in essentially the same way as the lower cutter is coupled to the drive, which is a common measure for those skilled in the art of producing hair clippers, dry shavers and the like.

Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung ist die zumindest eine Zinke mit dem Untermesser zur Untersetzung über einen Kipphebel mit dem Untermesser gekoppelt. Durch diese Maßnahme oszilliert die zumindest eine Zinke über einen geringeren Weg als das Untermesser, und es kann bei geeigneter Dimensionierung des Kipphebels und der Anlenkpunkte sichergestellt werden, dass die Zinke nur innerhalb jener Strecke oszilliert, die zwischen ohne frei stehende Enden ausgebildeten Stegen definiert ist, sodass die zumindest eine Zinke nicht mit dem Obermesser kollidiert. Dies würde zu vorzeitiger Materialermüdung sowohl der zumindest einen Zinke als auch des Obermessers führen und außerdem einen erhöhten Kraftaufwand seitens des Antriebs und damit einhergehend einen höheren Stromverbrauch des Haarschneiders mit einem erfindungsgemäßen Schneidkopf zur Folge haben.According to a preferred embodiment of the present invention, the at least one tine is coupled to the lower cutter for gear reduction via a rocker arm to the lower cutter. As a result of this measure, the at least one tine oscillates over a shorter distance than the lower blade, and with a suitable dimensioning of the rocker arm and the pivot points it can be ensured that the tine oscillates only within that distance which is defined between webs formed without free-standing ends, so that at least one tine does not collide with the upper blade. This would lead to premature material fatigue both of the at least one prong and of the upper cutter and also result in increased effort on the part of the drive and associated higher power consumption of the hair clipper with a cutting head according to the invention.

Wenn auf einem Schneidkopf gemäß der vorliegenden Erfindung eine Mehrzahl von Stegen mit frei stehenden Enden vorgesehen sind und dementsprechend auch eine Mehrzahl von Zinken, die an die Stege mit frei stehenden Enden anschließen, ist es bevorzugt, dass eine Mehrzahl von Zinken auf einem gemeinsamen Zinkenträger angeordnet ist. Bei dieser bevorzugten Ausführungsform entspringen die Zinken einem gemeinsamen Bauelement, welches sich entlang der Längserstreckung des Obermessers erstreckt, wobei ein solcher Zinkenträger zu beiden Seiten des Obermessers angeordnet sein kann, wenn das Obermesser entlang seiner Längsachse symmetrisch aufgebaut ist und daher Stege mit in der Ebene der Anlagefläche frei stehenden Enden zu beiden Seiten aufweist. Der Zinkenträger kann im Wesentlichen wie das Untermesser zur Kopplung der Bewegung der Zinken an den Antrieb bzw. das Untermesser gekoppelt sein, was bei einer Mehrzahl von Zinken einfacher und kostengünstiger zu bewerkstelligen ist, als die einzelnen Zinken separat zu montieren und anzutreiben.If a plurality of tines with free ends are provided on a cutting head according to the present invention and accordingly also a plurality of tines which connect to the ridges with free ends, it is preferred that a plurality of tines are arranged on a common tine carrier is. In this preferred embodiment, the tines originate from a common structural element which extends along the length of the upper cutter, with such a tine carrier being able to be arranged on both sides of the outer cutter if the outer cutter is constructed symmetrically along its longitudinal axis and therefore has webs in the plane of the Contact surface has free ends on both sides. The tine carrier can be coupled to the drive or the lower blade essentially like the lower blade for coupling the movement of the tines, which is easier and cheaper to do with a plurality of tines than to mount and drive the individual tines separately.

Um ein Obermesser mit frei stehenden Enden der Stege stabil bereitstellen zu können, ist es wünschenswert, die Stege mit nicht frei stehenden Enden miteinander zu verbinden, wie dies automatisch resultiert, wenn beispielsweise Schlitze aus einem flachen Blech gestanzt werden, sodass Stege und Schlitze im Blech verbleiben, um das Obermesser zu bilden. Die Verbindung der Stege mit den in der Ebene der Anlagefläche nicht frei stehenden Enden würde jedoch die Wirkung der Stege mit frei stehendem Ende zunichte machen, sodass es gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung vorgesehen ist, dass Stege mit in der Ebene der Anlagefläche nicht freistehendem Ende in einer von der Ebene der Anlagefläche verschiedenen Ebene durch einen einstückig mit dem Obermesser ausgebildeten Längsverbinder miteinander verbunden sind. Die Stege mit in der Ebene der Anlagefläche nicht freistehendem Ende werden demgemäß in eine von der Ebene der Anlagefläche verschiedene Ebene umgebogen und sind in dieser Ebene mit einem Längsverbinder bzw. einem Längsverbinderelement, welches aus dem Obermesser gebildet ist, miteinander verbunden, um die nötige Stabilität des Obermessers für einen sicheren und dauerhaften Betrieb zu gewährleisten.In order to be able to stably provide an upper knife with free-standing ends of the ridges, it is desirable to connect the ridges with non-free-standing ends together, as this automatically results when, for example, slots are stamped out of flat sheet metal, so that ridges and slots are in the sheet metal remain to form the upper knife. However, the connection of the webs with the ends that are not free-standing in the plane of the contact surface would nullify the effect of the webs with the free-standing end, so that it is provided according to a preferred embodiment of the present invention that webs with ends that are not free-standing in the plane of the contact surface End in a plane different from the plane of the contact surface by a piece with the Upper blade trained longitudinal connectors are connected to each other. The webs with an end that is not freestanding in the plane of the contact surface are accordingly bent over into a plane that differs from the plane of the contact surface and are connected to one another in this plane with a longitudinal connector or a longitudinal connector element, which is formed from the upper blade, in order to provide the necessary stability of the upper blade to ensure safe and long-lasting operation.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. In dieser zeigen

  • Fig. 1 eine perspektivische Ansicht eines erfindungsgemäßen Schneidkopfs, der durch Scherfolienelemente ergänzt ist,
  • Fig. 2 eine Detailansicht in perspektivischer Darstellung des Obermessers mit Zinken und
  • Fig. 3 eine perspektivische Ansicht einer Funktionseinheit des erfindungsgemäßen Schneidkopfs in zusammengebautem Zustand,
  • Fig. 4 den Schneidkopf gemäß Fig. 2 in einer teilweisen Explosionsdarstellung,
  • Fig. 5 eine perspektivische Darstellung des Schneidkopfs gemäß Fig. 3 mit Zinken.
The invention is explained in more detail below with reference to an exemplary embodiment shown schematically in the drawing. in this show
  • 1 a perspective view of a cutting head according to the invention, which is supplemented by shaving foil elements,
  • 2 a detailed view in perspective of the upper blade with tines and
  • 3 a perspective view of a functional unit of the cutting head according to the invention in the assembled state,
  • 4 according to the cutting head 2 in a partially exploded view,
  • figure 5 a perspective view of the cutting head according to FIG 3 with tines.

In Fig. 1 ist mit dem Bezugszeichen 1 ein Schneidkopf eines Haarschneiders, wie beispielsweise eines Bartschneiders bzw. Trockenrasierapparates dargestellt. Der Schneidkopf 1 ist ggf. im Sinne der Doppelpfeile 2 und 2' verschwenkbar auf einem Griffstück 3 angebracht, welches Griffstück 3 nicht dargestellte Komponenten, wie Stromversorgung, Antrieb und Bedienelemente aufweist. Mit 4 sind Scherfolienschneidelemente bezeichnet, wie sie im Stand der Technik hinlänglich bekannt und nicht zwingender Bestandteil der vorliegenden Erfindung sind. Der erfindungsgemäße Schneidkopf 1 weist nun ein Obermesser 5 auf, welches erfindungsgemäß durch Zinken 11 ergänzt wird.In 1 the reference number 1 shows a cutting head of a hair trimmer, such as a beard trimmer or dry shaver. The cutting head 1 is optionally mounted on a handle 3 such that it can be pivoted in the direction of the double arrows 2 and 2 ′, which handle 3 is not components shown, such as power supply, drive and controls. 4 designates shaving foil cutting elements, as they are well known in the prior art and are not a mandatory part of the present invention. The cutting head 1 according to the invention now has an upper blade 5 which is supplemented by tines 11 according to the invention.

In Fig. 2 ist zu erkennen, dass das Obermesser 5 eine Vielzahl von Stegen 6, 7 aufweist, von denen ein Teil als Stege 6 mit in der Ebene der Anlagefläche 8 frei stehenden Enden 9 ausgebildet sind. Die Stege 6 mit frei stehenden Enden 9 sind durch einen Längsträger 10 an Stege 7 mit nicht frei stehendem Ende gebunden. An die frei stehenden Enden 9 der Stege 6 schließen vom Obermesser 5 verschiedene Zinken 11 an, die auf einem gemeinsamen Zinkenträger 12 zu beiden Seiten des Obermessers 5 entlang der Längserstreckung des Obermessers 5 verlaufen. Die Zinken 11 weisen eine komplexere Geometrie auf als die einfach ausgebildeten frei stehenden Enden 9 der Stege 6 und können daher für die Zwecke des Aufstellens von kurzen oder flach an der Haut anliegenden Barthaaren und deren Zuführung in die Schlitze 13 zwischen den Stegen 6, 7 optimiert sein, was, wie oben bereits erläutert, nicht nur die Geometrie, sondern auch das Material der Zinken anbelangt. Die Stege 7 mit in der Ebene der Anlagefläche 8 nicht freistehendem Ende sind in einer von der Ebene der Anlagefläche 8 verschiedenen Ebene durch einen einstückig mit dem Obermesser 5 ausgebildeten Längsverbinder 25 miteinander verbunden.In 2 It can be seen that the outer cutter 5 has a multiplicity of webs 6 , 7 , some of which are in the form of webs 6 with ends 9 which are free in the plane of the contact surface 8 . The webs 6 with free ends 9 are connected by a longitudinal beam 10 to webs 7 with non-free ends. The free-standing ends 9 of the webs 6 are followed by tines 11 different from the outer cutter 5 and running on a common tine carrier 12 on both sides of the outer cutter 5 along the longitudinal extension of the outer cutter 5 . The tines 11 have a more complex geometry than the simple, free-standing ends 9 of the webs 6 and can therefore be optimized for the purpose of raising short whiskers or whiskers lying flat against the skin and feeding them into the slots 13 between the webs 6, 7 what, as already explained above, concerns not only the geometry but also the material of the tines. The webs 7 with an end that is not freestanding in the plane of the contact surface 8 are connected to one another in a plane different from the plane of the contact surface 8 by a longitudinal connector 25 formed in one piece with the outer cutter 5 .

In Fig. 3 ist zu erkennen, dass das Obermesser 5 über Verbindungselemente 14 mit einem Unterrahmen 15 verbunden ist, in welchem Federn 16 auf einen Träger 17 für ein in Fig. 3 nicht erkennbares Untermesser 21 (siehe Fig. 4) wirken, um das Untermesser 21 gegen das Obermesser 5 zu drücken, sodass das Untermesser 21 am Obermesser 5, genauer gesagt an dessen Scherfläche anliegend geführt ist, welche Scherfläche der Anlagefläche 8 gegenüberliegend am Obermesser 5 ausgebildet ist. Der nicht dargestellte Antrieb kann mit entsprechenden Mitteln in eine Nut 18 am Träger 17 des Untermessers eingreifen, sodass dieses zu oszillierender Bewegung im Sinne des Doppelpfeils 19 angetrieben wird.In 3 it can be seen that the outer cutter 5 is connected via connecting elements 14 to a lower frame 15, in which springs 16 are mounted on a carrier 17 for an in 3 Unrecognizable lower blade 21 (see 4 ) work around that Lower cutter 21 to press against the upper cutter 5, so that the lower cutter 21 is guided on the outer cutter 5, more precisely on its shearing surface, which shearing surface is formed opposite the contact surface 8 on the outer cutter 5. The drive, which is not shown, can engage in a groove 18 on the carrier 17 of the inner cutter with appropriate means, so that this is driven to perform an oscillating movement in the direction of the double arrow 19 .

In Fig. 4 ist nun auch das Untermesser 21 zu erkennen, welches eine Vielzahl von Schneidklingen 20 aufweist, die mit den Stegen 6, 7 des Obermessers 5 zum Schneiden von Haaren zusammenwirken.In 4 the bottom cutter 21 can now also be seen, which has a multiplicity of cutting blades 20 which interact with the webs 6, 7 of the top cutter 5 for cutting hair.

In Fig. 5 ist wiederum zu erkennen, dass Zinkenträger 12 zu beiden Seiten des Obermessers 5 angeordnet sein können, um die Zinken 11 zu tragen, die an Stege 6 mit frei stehendem Ende 9 anschließen. Die Zinken bzw. der Zinkenträger sind mit einem Mitnehmer 22 an die Bewegung des Untermessers 21 gekoppelt, sodass der Zinkenträger 12 bzw. die Zinken 11 sowie Untermesser 21 im Sinne des Doppelpfeils 23 oszillieren können, wobei es bei geeigneter Ausgestaltung des Mitnehmers 22 und des Zinkenträgers 12 auch möglich ist, eine kreissegmentförmige oszillierende Bewegung des Zinkenträgers 12 bzw. der Zinken 11 im Sinne des Doppelpfeils 24 zu realisieren.In figure 5 it can again be seen that tine carriers 12 can be arranged on both sides of the outer cutter 5 in order to carry the tines 11 which connect to webs 6 with a free-standing end 9 . The tines or the tine carrier are coupled to the movement of the lower blade 21 with a driver 22, so that the tine carrier 12 or the tines 11 and lower blade 21 can oscillate in the direction of the double arrow 23, with a suitable configuration of the driver 22 and the tine carrier 12 is also possible to realize an oscillating movement of the tine carrier 12 or the tines 11 in the direction of the double arrow 24 in the form of a segment of a circle.

Claims (9)

  1. Cutting head (1) for a hair clipper with an upper cutter (5) formed by a plurality of webs (6, 7) and slots (13) between the webs (6, 7), which webs (6, 7) have a contact surface (8) for skin contact and form a shearing surface opposite the contact surface (8), and with a lower cutter (21) having a plurality of cutting blades (20), which can be driven to oscillating movement relative to the upper cutter (5) and which is guided to lie against the shearing surface of the upper cutter (5), wherein at least one of the webs (6, 7) of the upper cutter (5) is designed with an end (9) which is free-standing in the plane of the contact surface (8), the at least one web (6) with the free-standing end (9) being adjoined by a prong (11) which is different from the upper cutter (5), characterized in that the at least one web (6) with the free-standing end (9) in the plane of the contact surface (8) is shortened in the direction of the plane of the contact surface (8), in particular by the length of the extension of the prong (11), compared to a web (7) having a non-free-standing end in the plane of the contact surface (8).
  2. Cutting head according to claim 1, characterized in that the at least one prong (11) has a tapering tip at its end remote from the free-standing end (9) of a web (6) of the upper cutter (5) .
  3. Cutting head according to claim 1 or 2, characterized in that the at least one prong (11) is made of a material that is different from the material of the upper cutter (5), in particular a material selected from the group consisting of thermoplastics, elastomers, ceramics, in particular injection-molded ceramics and metals, in particular injection molded metal.
  4. Cutting head according to claim 1, 2 or 3, characterized in that the at least one prong (11) rises above the plane of the contact surface (8).
  5. Cutting head according to any one of claims 1 to 4, characterized in that the at least one prong (11) is movably guided in the longitudinal direction of the upper cutter (5).
  6. Cutting head according to any one of claims 1 to 5, characterized in that the at least one prong (11) is coupled to the lower cutter (21) for movement in the same direction or in opposite direction, in particular a curved movement, in particular a movement in the form of at least a segment of a circle transverse to the plane of the contact surface (8).
  7. Cutting head according to any one of claims 1 to 6, characterized in that the at least one prong (11) is coupled to the lower cutter (21) for reduction via a rocker arm with the lower cutter (21).
  8. Cutting head according to any one of claims 1 to 7, characterized in that a plurality of prongs (11) is arranged on a common prong carrier (12).
  9. Cutting head according to any one of claims 1 to 8, characterized in that webs (7) having a non-free-standing end in the plane of the contact surface (8) are connected to each other in a plane different from the plane of the contact surface (8) by a longitudinal connector (25) formed integrally with the upper cutter (5).
EP19723624.3A 2018-04-27 2019-04-25 Cutting head Active EP3784453B1 (en)

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AT1212018A AT521184A1 (en) 2018-04-27 2018-04-27 cutting head
PCT/AT2019/000014 WO2019204837A1 (en) 2018-04-27 2019-04-25 Cutting head

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JP2022155354A (en) * 2021-03-30 2022-10-13 パナソニックＩｐマネジメント株式会社 Comb-shaped outer blade, blade unit and electric shaver

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223205A (en) * 1936-12-05 1940-11-26 American Safety Razor Corp Dry shaver
US2262388A (en) * 1937-06-26 1941-11-11 American Safety Razor Corp Shaving device
DE4312060C1 (en) 1993-04-13 1994-06-01 Braun Ag Cutting head for electric shaver - has drawing-in elements with freely projecting ends which execute combing function, and forming top blade contact surface
DE4413352C1 (en) * 1994-04-18 1995-05-04 Braun Ag Method for producing a cutter for a cutting device of an electric razor or beard trimmer
CN1101297C (en) * 1996-05-29 2003-02-12 三洋电机株式会社 Electric razor
DE19633824C1 (en) * 1996-08-22 1997-06-05 Braun Ag Electrically powered shaver
DE19822094C2 (en) * 1998-05-16 2000-03-02 Braun Gmbh Dry shaver
DE10344566A1 (en) * 2003-09-25 2005-04-28 Braun Gmbh Trimming system for an electrical hair removal appliance, especially an electrical shaving appliance, comprises a trimming unit provided with an upper blade and a lower blade, and a supply unit displaced in relation to the upper blade
DE102005002896A1 (en) * 2005-01-21 2006-07-27 Braun Gmbh Electric hair clipper

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