EP1871575B1 - Systeme de coupe pour un appareil electrique servant a couper les cheveux - Google Patents

Systeme de coupe pour un appareil electrique servant a couper les cheveux Download PDF

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Publication number
EP1871575B1
EP1871575B1 EP06723042A EP06723042A EP1871575B1 EP 1871575 B1 EP1871575 B1 EP 1871575B1 EP 06723042 A EP06723042 A EP 06723042A EP 06723042 A EP06723042 A EP 06723042A EP 1871575 B1 EP1871575 B1 EP 1871575B1
Authority
EP
European Patent Office
Prior art keywords
clipping
holder
blade
machine part
clipping system
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
EP06723042A
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German (de)
English (en)
Other versions
EP1871575A1 (fr
Inventor
Wolfgang Longerich
Rolf Eimecke
Andreas Peter
Stefan Eich
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 EP1871575A1 publication Critical patent/EP1871575A1/fr
Application granted granted Critical
Publication of EP1871575B1 publication Critical patent/EP1871575B1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/044—Manufacture and assembly of cutter blocks

Definitions

  • the invention relates to a shaving system for an electric hair trimmer and an electric hair trimmer with such a shaving system.
  • a shaving system for an electric shaver typically has a bottom blade and a top blade that closely abut each other and move relative to each other. By this relative movement whiskers, which reach into the area between the upper blade and the lower blade, severed.
  • Such a razor is for example from the EP 1 182 014 A2 known.
  • an electric razor is disclosed which has two bottom blades and a trained as a shear foil upper blade. The lower blades are placed in a linear oscillating motion and thereby cut through in cooperation with the upper knife the whiskers.
  • an electric shaver having two lower blades that oscillate relative to a top blade formed as a foil.
  • the lower blades are each connected via a coupling element with a drive element.
  • the respective lower blade is arranged on the coupling element such that projections formed on the coupling element engage in recesses of the lower blade.
  • the invention has for its object to permanently fix a shearing blade of an electric hair clipper on a machine part and thereby achieve the highest possible precision with a reasonable cost.
  • the shearing system for an electric hair trimmer comprises a shearing blade for severing hair and a machine part with which the shearing blade is firmly connected, wherein the shearing blade and the machine part are connected to each other via at least one metallic welded joint, at least one holder is formed on the shearing blade and the holder between the welded joint and the shearing blade has a reduced material cross-section area.
  • the invention has the advantage that the shearing blade is precisely and permanently fixed to the machine part.
  • the metallic weld is very durable, takes up little space and can be made quickly and inexpensively.
  • the welded joint is arranged in the region of the holder. It is advantageous if the holder is easier to deform than the shearing blade.
  • the welded joints are preferably arranged so that at least partially compensate for the stresses caused by the welds.
  • the welds are formed at mutually symmetrical locations of the holder.
  • the holder is preferably formed integrally with the shearing blade. Furthermore, it is advantageous if the holder is connected via a web to the shear blade. The web also leads to a certain decoupling of the welded connection or of the several welded connections from the shearing blade and thereby to a reduction of welding-induced distortions.
  • the holder can surround the machine part in some areas. This facilitates the fixation of the shear blade on the machine part and gives a reliable grip.
  • the holder follows in accordance with a variant in the entire Umsch.ungs Kunststoff with their machine part facing surface of the molding of the machine part.
  • the holder differs regionally, in particular in an area adjacent to the welded joint with its surface facing the machine part from the shape of the machine part that the distance of the holder is increased by the machine part in this area. In the area of deviating shaping, the holder thus has a reduced material cross-section, so that any stresses, in particular in this area, cause deformations and, if necessary, are transmitted in an attenuated form to the shearing blade.
  • the shearing system according to the invention can be designed so that the holder has at least one holding arm. It is particularly advantageous if the holder has two, in particular symmetrically designed holding arms, between which the machine part is arranged. In this embodiment, a particularly effective suppression or compensation of voltages is possible.
  • the shearing blade may be formed as a lower blade, which is driven in particular oscillating over the machine part.
  • the shearing blade may have a U-shaped cross-section.
  • the shearing blade may have a material thickness of less than 1 mm, preferably less than 0.5 mm and in particular about 0.3 mm.
  • a further shearing blade is provided, with which cooperates the shearing blade.
  • the invention further relates to an electric hair trimmer with at least one inventively designed shear system.
  • the lower blade 8 is U-shaped and is composed of a first leg 9, a second leg 10 and an arranged between the legs 9 and 10 elbow piece 11 together.
  • a plurality of individual blades 12 are arranged at regular intervals from each other.
  • the individual blades 12 are formed in particular sharp.
  • On each leg 9 and 10 of the lower blade 8 each two brackets 13 are formed, with which the lower blade 8 is fixed to two axles 14 which are oriented transversely to the longitudinal extent of the lower blade 8.
  • the axes 14 may be components of an otherwise not figuratively illustrated carrier, which couples the lower blade 8 with a drive of the razor 1, by means of which the lower blade 8 is set in a linear oscillating movement.
  • the formation of the brackets 13 is based on Fig. 4 explained in more detail.
  • Fig. 4 shows an enlarged section Fig. 2 in the region of one of the holders 13.
  • the holder 13 is symmetrically shaped and formed integrally with the first leg 9 of the lower blade 8.
  • the holder 13 has two retaining arms 15, which together form a fork and partially encompass the illustrated axis 14.
  • the two holding arms 15 unite in the region of a web 16, via which the holder 13 is connected to the first leg 9 of the lower blade 8.
  • the web 16 has a lateral extent parallel to the outer contour of the first leg 9 of the lower blade 8, which is smaller than the entire lateral extent of the two support arms 15.
  • the support arms 15 are formed with arcuate inner surfaces 17 at.
  • the axis 14 is made of metal, preferably made of steel.
  • the lower blade 8 is made of metal at least in the region of the brackets 13.
  • the lower blade 8 is made entirely of metal, in turn, steel is particularly well suited as a material.
  • the material thickness of the lower blade 8 is less than 1 mm.
  • a material thickness of less than 0.5 mm is selected. In the illustrated embodiment, the material thickness is about 0.3 mm.
  • the holder 13 and the axis 14 are welded together.
  • two welding points 18 are formed in the vicinity of the free ends of the support arms 15 in mutually symmetrical positions. Between the welding points 18 and the web 16, the holding arms 15 each have a partially reduced material cross section.
  • the welding spots 18 are preferably formed by laser welding.
  • the designated boundary areas between the support arms 15 and the axle 14 are briefly exposed to a high-energy laser beam. This leads to a local melting of the material in the region of the laser beam.
  • the molten material of the holding arms 15 connects to the molten material of the axis 14.
  • the melting takes place in a period of about 1 ms to 10 ms and is carried out for both welding points 18 simultaneously or in short succession.
  • the time offset of the melting between the two welding points 18 is a maximum of about 1 ms, so that the material in the region of the second welding point 18 is already melted before the material is solidified in the first melting point 18.
  • the simultaneous melting in the region of the two welding spots 18 can be achieved, for example, with the aid of a bifocal laser beam, which is adjusted so that one focus is formed in the region of each of the two welding spots 18.
  • a bifocal laser beam which is adjusted so that one focus is formed in the region of each of the two welding spots 18.
  • volumetric shrinkage and contraction of the cooling melt create stresses.
  • tensile stresses arise normal to the envelope surface of the melt volume, which corresponds to the illustrated spot welds 18.
  • the stresses can be reduced to some degree by a low melt volume and a small weld gap.
  • a plurality of welds 18 are formed in the manner described at least approximately simultaneously, so that partially cancel the tensions in the contraction of the melt volume.
  • the four welding points 18, via which the axle 14 is connected to a holder 13 of the first leg 9 and a holder 13 of the second leg 10 of the lower cutter 8, can be generated simultaneously or approximately simultaneously.
  • a second measure is that the individual welding points 18 are preferably arranged so that after cooling the melt in the welding gap normal to the envelope surface of the melt volume can be a cancellation of the voltages.
  • the welding points 18 are arranged symmetrically opposite each other for this purpose.
  • brackets 13 deform more easily than the lower blade 8. This is due to the fork shape of the brackets 13 and the partially reduced material cross section of the support arms 15th reached.
  • the stresses acting on the lower blade 8 can be limited by the fact that the measures described are used in combination. But it is also possible to apply the measures individually or as subcombinations.
  • the described arrangement of the welding points 18 and the at least approximately simultaneous melting are preferably used in combination. Further embodiments of this are in the FIGS. 5 and 6 shown.
  • the slight deformability of the brackets 13 can be used. Exemplary embodiments of this show the Fig. 7 to 10 .
  • FIGS. 5 and 6 show further embodiments of the lower blade 8, wherein the brackets 13 are fixed with two welding points 18 on the axis 14, in a Fig. 4 corresponding representation.
  • the axis 14 is almost completely enclosed by the holding arms 15 of the holder 13 except for a small gap 19.
  • the gap 19 is formed in each case on a web 16 of the opposite side of the holder 13 between the free ends of the support arms 15. On both sides of the gap 19 each have a weld 18 is formed.
  • each of the entire inner surface 17 of the two support arms 15 is formed circular arc. According to the embodiment Fig.
  • Fig. 7 to 10 show exemplary embodiments of the lower blade 8, wherein the brackets 13 are fixed, each with a welding point 18 on the axis 14, in one Fig. 4 appropriate Presentation.
  • the holder 13 in each case only one holding arm 15 and is formed overall hook-shaped. In the vicinity of its free end of the support arm 15 is connected by a weld 18 with the axis 14.
  • FIGS. 7 and 8 encloses the support arm 15 approximately half the circumferential area of the axis 14.
  • the inner surface 17 of the support arm 15 in the embodiment of Fig. 7 formed through a circular arc.
  • the embodiment of Fig. 8 has in addition to the welding point 18 on a bulge 20, so that the inner surface 17 of the support arm 15 is formed only partially circular arc.
  • FIGS. 9 and 10 encloses the support arm 15, the axis 14 in each case almost completely, so that the free end of the support arm 15 each extends almost to the web 16.
  • the welding point 18 is also formed again in the vicinity of the free end of the support arm 15 in these embodiments.
  • the embodiment of Fig. 9 has a continuous circular arc-shaped inner surface 17 of the holding arm 15.
  • a bulge 20 is formed. Outside the bulge 20, the inner surface 17 of the support arm 15 is formed in a circular arc.
  • the weld spots 18 can be made not only with the above-described laser welding, but also with other high energy sealing processes, such as micro plasma or electron beam welding.

Landscapes

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

Claims (17)

  1. Système de cisaille pour une tondeuse électrique (1), comprenant une lame de tondeuse (8) pour sectionner les poils et un élément de machine (14) auquel la lame de tondeuse (8) est reliée de manière fixe, la lame de tondeuse (8) et l'élément de machine (14) étant reliés l'un à l'autre par l'intermédiaire d'au moins une soudure métallique (18) et au moins une patte de fixation (13) étant formée au niveau de la lame de tondeuse (8) et la soudure (18) étant disposée dans le secteur de la patte de fixation (13), caractérisé en ce que la fixation (13) présente localement une section réduite de matériau entre la soudure (18) et la lame de tondeuse (8).
  2. Système de cisaille selon la revendication 1, caractérisé en ce que la patte de fixation (13) est plus facilement déformable que la lame de tondeuse (13).
  3. Système de cisaille selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que plusieurs soudures (18) par patte de fixation (13) sont formées.
  4. Système de cisaille selon la revendication 3, caractérisé en ce que les soudures (18) sont disposées de sorte que des tensions provoquées par les soudures (18) se compensent au moins partiellement.
  5. Système de cisaille selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que les soudures (18) sont formées au niveau d'emplacements de la patte de fixation (13) symétriques les uns par rapport aux autres.
  6. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce que la patte de fixation (13) est formée d'une seule pièce avec la lame de tondeuse (8).
  7. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce que la fixation (13) est reliée à la lame de tondeuse (8) par l'intermédiaire d'un talon (16).
  8. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce que la patte de fixation (13) entoure localement l'élément de machine (14).
  9. Système de cisaille selon la revendication 8, caractérisé en ce que la surface (17), tournée vers l'élément de machine (14), de la patte de fixation (13) suit le modèle de l'élément de machine (14) sur l'ensemble du secteur entourant.
  10. Système de cisaille selon la revendication 9, caractérisé en ce que la surface (17), tournée vers l'élément de machine (14), de la patte de fixation (13) s'écarte localement du modèle de l'élément de machine (14), en particulier dans un secteur adjacent à la soudure (18), de sorte que l'écart entre la patte de fixation (13) et l'élément de machine (14) est augmenté dans ce secteur.
  11. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce que la patte de fixation (13) présente au moins un bras de retenue (15).
  12. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce que la patte de fixation (13) présente deux bras de retenue (15), formés en particulier de manière symétrique, entre lesquels est disposé l'élément de machine (14).
  13. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame de tondeuse (8) est formée en tant que lame inférieure pouvant être entraînée en particulier de manière oscillante par l'intermédiaire de l'élément de machine (14).
  14. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame de tondeuse (8) présente une section en forme de U.
  15. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame de tondeuse (8) présente une épaisseur de matériau inférieure à 1 mm, de préférence inférieure à 0,5 mm et en particulier d'environ 0,3 mm.
  16. Système de cisaille selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une autre lame de tondeuse (7) est prévue, avec laquelle collabore la lame de tondeuse (8).
  17. Tondeuse électrique comprenant au moins un système de cisaille (5), caractérisée en ce que le système de cisaille (5) est formé selon l'une quelconque des revendications précédentes.
EP06723042A 2005-03-05 2006-02-15 Systeme de coupe pour un appareil electrique servant a couper les cheveux Active EP1871575B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005010244A DE102005010244A1 (de) 2005-03-05 2005-03-05 Schersystem für ein elektrisches Haarschneidegerät
PCT/EP2006/001345 WO2006094605A1 (fr) 2005-03-05 2006-02-15 Systeme de coupe pour un appareil electrique servant a couper les cheveux

Publications (2)

Publication Number Publication Date
EP1871575A1 EP1871575A1 (fr) 2008-01-02
EP1871575B1 true EP1871575B1 (fr) 2009-10-28

Family

ID=36390230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06723042A Active EP1871575B1 (fr) 2005-03-05 2006-02-15 Systeme de coupe pour un appareil electrique servant a couper les cheveux

Country Status (7)

Country Link
US (1) US7895753B2 (fr)
EP (1) EP1871575B1 (fr)
JP (1) JP4870146B2 (fr)
CN (1) CN101132888B (fr)
AT (1) ATE446826T1 (fr)
DE (2) DE102005010244A1 (fr)
WO (1) WO2006094605A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005010244A1 (de) * 2005-03-05 2006-09-07 Braun Gmbh Schersystem für ein elektrisches Haarschneidegerät
DE102008031135B4 (de) * 2008-07-01 2014-11-20 Braun Gmbh Schneideinrichtung zum Entfernen von Haaren

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT181527B (de) * 1953-12-17 1955-03-25 Gerhard Dipl Ing Heyek Untermesser für den Scherkopf von Trockenrasierapparaten
US2841867A (en) * 1957-03-15 1958-07-08 Padgett Grady Reciprocating dry shaver head construction
US3060570A (en) * 1959-03-04 1962-10-30 Wahl Clipper Corp Mounting structure for movable cutting blade
US3201178A (en) * 1963-08-21 1965-08-17 Matsushita Electric Works Ltd Electric dry shaver head having trimmer edge
US3555676A (en) * 1966-05-27 1971-01-19 Sunbeam Corp Electric dry shaver
US3858461A (en) * 1973-11-08 1975-01-07 Sperry Rand Corp Shaver inner cutter
FR2575691B1 (fr) * 1985-01-09 1988-07-08 Seb Sa Couteaux pour rasoir a grille et support portant ces co uteaux, procede d'affutage et de montage de ces couteaux
JPH0671060A (ja) * 1992-08-26 1994-03-15 Matsushita Electric Works Ltd 往復式電気かみそりの内刃及びその製造方法
DE4413352C1 (de) * 1994-04-18 1995-05-04 Braun Ag Verfahren zur Herstellung eines Messers für eine Schneideinrichtung eines elektrischen Rasierapparates oder Bartschneiders
GB9614160D0 (en) * 1996-07-05 1996-09-04 Gillette Co Dry shaving apparatus
GB9614159D0 (en) * 1996-07-05 1996-09-04 Gillette Co Dry shaving apparatus
KR100543557B1 (ko) * 1997-10-30 2007-04-25 산요덴키가부시키가이샤 전기면도기
JP2002058887A (ja) * 2000-08-22 2002-02-26 Matsushita Electric Works Ltd 電気かみそりの刃
JP4273786B2 (ja) * 2003-02-25 2009-06-03 パナソニック電工株式会社 電気かみそり
JP2005198795A (ja) * 2004-01-15 2005-07-28 Izumi Products Co 往復式電気かみそりの内刃製造方法および内刃
JP4140558B2 (ja) * 2004-06-14 2008-08-27 松下電工株式会社 電気かみそり器
DE102005010244A1 (de) * 2005-03-05 2006-09-07 Braun Gmbh Schersystem für ein elektrisches Haarschneidegerät

Also Published As

Publication number Publication date
CN101132888B (zh) 2010-06-16
ATE446826T1 (de) 2009-11-15
EP1871575A1 (fr) 2008-01-02
DE102005010244A1 (de) 2006-09-07
JP4870146B2 (ja) 2012-02-08
DE502006005247D1 (de) 2009-12-10
US7895753B2 (en) 2011-03-01
WO2006094605A1 (fr) 2006-09-14
JP2008531229A (ja) 2008-08-14
CN101132888A (zh) 2008-02-27
US20080047146A1 (en) 2008-02-28

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