EP3784453B1 - Tête de coupe - Google Patents

Tête de coupe 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
Authority
EP
European Patent Office
Prior art keywords
contact surface
plane
cutting head
prong
free
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.)
Active
Application number
EP19723624.3A
Other languages
German (de)
English (en)
Other versions
EP3784453A1 (fr
Inventor
Mathias Oswald
René Hendler
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.)
Payer International Technologies GmbH
Original Assignee
Payer International Technologies 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 Payer International Technologies GmbH filed Critical Payer International Technologies GmbH
Publication of EP3784453A1 publication Critical patent/EP3784453A1/fr
Application granted granted Critical
Publication of EP3784453B1 publication Critical patent/EP3784453B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B26B19/06—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.

Landscapes

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

Claims (9)

  1. Tête de coupe (1) destinée à un dispositif de coupe de cheveux avec un couteau supérieur (5) constitué d'une pluralité d'éléments jointifs (6, 7) et de fentes (13) entre les éléments jointifs (6, 7), lesquels éléments jointifs (6, 7) forment une surface d'appui (8) pour le contact avec la peau et une surface de cisaillement opposée à la surface d'appui (8), ainsi qu'un couteau inférieur (21) présentant une pluralité de lames de coupe (20), pouvant être entraîné de façon à effectuer un mouvement oscillant par rapport au couteau supérieur (5) et guidé de façon à reposer contre la surface la surface de cisaillement du couteau supérieur (5), au moins l'un des éléments jointifs (6, 7) du couteau supérieur (5) étant formé avec une extrémité libre (9) dans le plan de la surface d'appui (8), dans laquelle une dent (11) distincte du couteau supérieur (5) est adjacente à l'au moins un élément jointif (6) comprenant l'extrémité libre (9), caractérisée en ce que l'au moins un élément jointif (6) comprenant l'extrémité libre (9) dans le plan de la surface d'appui (8) est raccourci dans la direction du plan de la surface d'appui (8) par rapport à un élément jointif (7) comprenant une extrémité non libre dans le plan de la surface d'appui (8), notamment de la longueur de l'extension de la dent (11).
  2. Tête de coupe selon la revendication 1, caractérisée en ce que l'au moins une dent (11) présente une pointe effilée à son extrémité éloignée de l'extrémité libre (9) d'un élément jointif (6) du couteau supérieur (5).
  3. Tête de coupe selon la revendication 1 ou 2, caractérisée en ce que l'au moins une dent (11) est réalisée dans un matériau différent du matériau du couteau supérieur (5), notamment dans un matériau choisi dans le groupe composé de thermoplastiques, d'élastomères, de céramiques, notamment de céramiques moulées par injection, et de métaux, notamment du métal moulé par injection.
  4. Tête de coupe selon la revendication 1, 2 ou 3, caractérisée en ce que l'au moins une dent (11) s'élève au-dessus du plan de la surface d'appui (8).
  5. Tête de coupe selon l'une des revendications 1 à 4, caractérisée en ce que l'au moins une dent (11) est guidée de manière mobile dans le sens longitudinal du couteau supérieur (5).
  6. Tête de coupe selon l'une des revendications 1 à 5, caractérisée en ce que l'au moins une dent (11) est couplée au couteau inférieur (21) pour un mouvement dans le même sens ou dans des sens opposés, notamment un mouvement courbe, en particulier au moins un mouvement en forme de segment circulaire transversalement au plan de la surface d'appui (8).
  7. Tête de coupe selon l'une des revendications 1 à 6, caractérisée en ce que l'au moins une dent (11) est couplée au couteau inférieur (21) pour réduction via un culbuteur avec le couteau inférieur (21).
  8. Tête de coupe selon l'une des revendications 1 à 7, caractérisée en ce qu'une pluralité de dents (11) est disposée sur un porte-dent commun (12).
  9. Tête de coupe selon l'une des revendications 1 à 8, caractérisée en ce que des éléments jointifs (7) comprenant une extrémité non libre dans le plan de la surface d'appui sont connectés les uns aux autres dans un plan différent du plan de la surface d'appui (8) par un connecteur longitudinal (25) formée d'un seul tenant avec le couteau supérieur (5).
EP19723624.3A 2018-04-27 2019-04-25 Tête de coupe Active EP3784453B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1212018A AT521184A1 (de) 2018-04-27 2018-04-27 Schneidkopf
PCT/AT2019/000014 WO2019204837A1 (fr) 2018-04-27 2019-04-25 Tête de coupe

Publications (2)

Publication Number Publication Date
EP3784453A1 EP3784453A1 (fr) 2021-03-03
EP3784453B1 true EP3784453B1 (fr) 2022-06-22

Family

ID=66529706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19723624.3A Active EP3784453B1 (fr) 2018-04-27 2019-04-25 Tête de coupe

Country Status (3)

Country Link
EP (1) EP3784453B1 (fr)
AT (1) AT521184A1 (fr)
WO (1) WO2019204837A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022155354A (ja) * 2021-03-30 2022-10-13 パナソニックＩｐマネジメント株式会社 櫛状外刃、刃ユニット、および電気かみそり

Family Cites Families (9)

* 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 (de) 1993-04-13 1994-06-01 Braun Ag Scherkopf für einen Trockenrasierapparat
DE4413352C1 (de) * 1994-04-18 1995-05-04 Braun Ag Verfahren zur Herstellung eines Messers für eine Schneideinrichtung eines elektrischen Rasierapparates oder Bartschneiders
CN1101297C (zh) * 1996-05-29 2003-02-12 三洋电机株式会社 电动剃须刀
DE19633824C1 (de) * 1996-08-22 1997-06-05 Braun Ag Elektrisch betreibbarer Rasierapparat
DE19822094C2 (de) * 1998-05-16 2000-03-02 Braun Gmbh Trockenrasierapparat
DE10344566A1 (de) * 2003-09-25 2005-04-28 Braun Gmbh Schersystem für ein elektrisches Haarentfernungsgerät
DE102005002896A1 (de) * 2005-01-21 2006-07-27 Braun Gmbh Elektrisches Haarschneidegerät

Also Published As

Publication number Publication date
EP3784453A1 (fr) 2021-03-03
AT521184A1 (de) 2019-11-15
WO2019204837A1 (fr) 2019-10-31

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