EP1871575B1 - Clipping system for an electric hair-cutting appliance - Google Patents
Clipping system for an electric hair-cutting appliance Download PDFInfo
- 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.)
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- 239000000463 material Substances 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 description 26
- 238000010008 shearing Methods 0.000 description 19
- 239000011888 foil Substances 0.000 description 7
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000012768 molten material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000019300 CLIPPERS Diseases 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
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.
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- 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)
Abstract
Description
Die Erfindung betrifft ein Schersystem für ein elektrisches Haarschneidegerät und ein elektrisches Haarschneidegerät mit einem derartigen Schersystem.The invention relates to a shaving system for an electric hair trimmer and an electric hair trimmer with such a shaving system.
Ein Schersystem für einen elektrischen Rasierapparat weist in der Regel ein Untermesser und ein Obermesser auf, die eng aneinander anliegen und sich relativ zueinander bewegen. Durch diese Relativbewegung werden Barthaare, die in den Bereich zwischen dem Obermesser und dem Untermesser gelangen, durchtrennt.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.
Ein derartiger Rasierapparat ist beispielsweise aus der
Aus der
Aus der
Das mit derart ausgebildeten Rasierapparaten erzielbare Rasurergebnis hängt insbesondere auch davon ab, wie exakt Untermesser und Obermesser zusammenwirken.The achievable with such razors shaving result depends in particular on how exactly cooperate lower blade and upper blade.
Der Erfindung liegt die Aufgabe zugrunde, ein Schermesser eines elektrischen Haarschneidegeräts dauerhaft an einem Maschinenteil zu fixieren und dabei mit einem vertretbaren Aufwand eine möglichst hohe Präzision zu erreichen.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.
Diese Aufgabe wird durch die Merkmalskombination des Anspruchs 1 gelöst.This object is achieved by the combination of features of claim 1.
Das erfindungsgemäße Schersystem für ein elektrisches Haarschneidegerät weist ein Schermesser zum Durchtrennen von Haaren und ein Maschinenteil auf, mit dem das Schermesser fest verbunden ist, wobei das Schermesser und das Maschinenteil über wenigstens eine metallische Schweißverbindung miteinander verbunden sind, am Schermesser wenigstens eine Halterung ausgebildet ist und die Halterung zwischen der Schweißverbindung und dem Schermesser bereichsweise einen reduzierten Materialquerschnitt aufweist.The shearing system for an electric hair trimmer according to the invention 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.
Die Erfindung hat den Vorteil, daß das Schermesser präzise und dauerhaft am Maschinenteil fixiert ist. Die metallische Schweißverbindung ist sehr haltbar, benötigt wenig Platz und kann schnell und kostengünstig hergestellt werden.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.
Bei der Ausbildung der Schweißverbindung entstandene Spannungen bewirken vorwiegend im Bereich des reduzierten Materialquerschnitts Verformungen und werden somit nicht oder lediglich in reduzierter Form auf das Schermesser übertragen. Folglich kann eine unerwünschte Verformung des Schermessers vermieden werden und somit eine gute Maßhaltigkeit erreicht werden. Dies ist eine wichtige Vorraussetzung zur Erzielung eines guten Rasurergebnisses.In the formation of the welded joint resulting stresses cause deformations mainly in the region of the reduced material cross-section and are therefore not or only in reduced form transferred to the shear blade. Consequently, an undesirable deformation of the doctor can be avoided and thus a good dimensional stability can be achieved. This is an important prerequisite for achieving a good shaving result.
Bei einem bevorzugten Ausführungsbeispiel der Erfindung ist die Schweißverbindung im Bereich der Halterung angeordnet. Dabei ist es von Vorteil, wenn die Halterung leichter verformbar ist als das Schermesser.In a preferred embodiment of the invention, 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.
Pro Halterung können mehrere Schweißverbindungen ausgebildet sein. Dabei sind die Schweißverbindungen vorzugsweise so angeordnet, daß sich von den Schweißverbindungen verursachte Spannungen wenigstens teilweise kompensieren. Beispielsweise sind die Schweißverbindungen an zueinander symmetrischen Stellen der Halterung ausgebildet. Diese Maßnahmen führen wiederum dazu, daß etwaige Spannungen im Schermesser und damit einhergehende Verzüge auf ein vertretbares Maß begrenzt werden.Per bracket several welds can be formed. The welded joints are preferably arranged so that at least partially compensate for the stresses caused by the welds. For example, the welds are formed at mutually symmetrical locations of the holder. These measures in turn lead to any stresses in the blade and associated delays are limited to an acceptable level.
Die Halterung ist vorzugsweise einteilig mit dem Schermesser ausgebildet. Weiterhin ist es von Vorteil, wenn die Halterung über einen Steg mit dem Schermesser verbunden ist. Durch den Steg kommt es ebenfalls zu einer gewissen Entkopplung der Schweißverbindung bzw. der mehreren Schweißverbindungen vom Schermesser und dadurch zu einer Reduzierung schweißbedingter Verzüge.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.
Die Halterung kann das Maschinenteil bereichsweise umschließen. Dies erleichtert die Fixierung des Schermessers am Maschinenteil und ergibt einen zuverlässigen Halt. Dabei folgt die Halterung gemäß einer Variante im gesamten Umschließungsbereich mit ihrer dem Maschinenteil zugewandten Fläche der Formgebung des Maschinenteils. Gemäß einer weiteren Variante weicht die Halterung bereichsweise, insbesondere in einem zur Schweißverbindung benachbarten Bereich mit ihrer dem Maschinenteil zugewandten Fläche derart von der Formgebung des Maschinenteils ab, daß der Abstand der Halterung vom Maschinenteil in diesem Bereich vergrößert ist. Im Bereich der abweichenden Formgebung weist die Halterung somit einen reduzierten Materialquerschnitt auf, so daß etwaige Spannungen insbesondere in diesem Bereich Deformationen bewirken und allenfalls in abgeschwächter Form auf das Schermesser übertragen werden.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. In this case, the holder follows in accordance with a variant in the entire Umschließungsbereich with their machine part facing surface of the molding of the machine part. According to a further variant, 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.
Das erfindungsgemäße Schersystem kann so ausgebildet sein, daß die Halterung wenigstens einen Haltearm aufweist. Besonders vorteilhaft ist es, wenn die Halterung zwei insbesondere symmetrisch ausgebildete Haltearme aufweist, zwischen denen das Maschinenteil angeordnet ist. Bei dieser Ausgestaltung ist eine besonders wirksame Unterdrückung bzw. Kompensation von Spannungen möglich.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.
Das Schermesser kann als ein Untermesser ausgebildet sein, das über das Maschinenteil insbesondere oszillierend antreibbar ist. Insbesondere kann das Schermesser einen U-förmigen Querschnitt aufweisen. Das Schermesser kann eine Materialstärke von weniger als 1 mm, vorzugsweise weniger als 0,5 mm und insbesondere etwa 0,3 mm aufweisen. Vorzugsweise ist beim erfindungsgemäßen Schersystem ein weiteres Schermesser vorgesehen, mit dem das Schermesser zusammenwirkt.The shearing blade may be formed as a lower blade, which is driven in particular oscillating over the machine part. In particular, 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. Preferably, in the shear system according to the invention, a further shearing blade is provided, with which cooperates the shearing blade.
Die Erfindung bezieht sich weiterhin auf ein elektrisches Haarschneidegerät mit wenigstens einem erfindungsgemäß ausgebildeten Schersystem.The invention further relates to an electric hair trimmer with at least one inventively designed shear system.
Besonders vorteilhaft ist es, wenn mehrere Schweißverbindungen gleichzeitig ausgebildet werden. Auf diese Weise kann die Entstehung von Spannungen bei der Ausbildung der Schweißverbindungen eingedämmt werden. Ähnliches läßt sich dadurch erreichen, daß die Energiezufuhr zur Ausbildung mehrerer Schweißverbindungen zeitlich nacheinander erfolgt, wobei die Zeitdifferenz jeweils so klein gewählt wird, daß geschmolzenes Material zum gleichen Zeitpunkt im Bereich der mehreren Schweißverbindungen vorliegt.It is particularly advantageous if several welded joints are formed simultaneously. In this way, the formation of stresses in the formation of welded joints can be contained. The same can be achieved in that the energy supply to form a plurality of welded joints takes place in succession, wherein the time difference is selected in each case so small that molten material is present at the same time in the region of the plurality of welded joints.
Die Erfindung wird nachstehend anhand der in der Zeichnung dargestellten Ausführungsbeispiele näher erläutert.The invention is explained below with reference to the embodiments illustrated in the drawings.
Es zeigen:
- Fig. 1
- ein Ausführungsbeispiel eines elektrischen Rasierapparats in Seitenansicht,
- Fig. 2
- ein Ausführungsbeispiel eines erfindungsgemäß ausgebildeten Untermessers in Seitenansicht,
- Fig. 3
- das Untermesser aus
Fig. 2 in Schnittdarstellung, - Fig. 4
- einen vergrößerten Ausschnitt aus
Fig. 2 im Bereich einer der Halterungen, - Fig. 5 und 6
- weitere Ausführungsbeispiele für das Untermesser, wobei die Halterungen mit je zwei Schweißpunkten an der Achse fixiert sind, in einer
Fig. 4 entsprechen- den Darstellung und - Fig. 7 bis 10
- Ausführungsbeispiele für das Untermesser, wobei die Halterungen mit je ei- nem Schweißpunkt an der Achse fixiert sind, in einer
Fig. 4 entsprechenden Darstellung.
-
Fig. 1 zeigt ein Ausführungsbeispiel eines elektrischen Rasierapparats 1 in Seitenansicht. Der Rasierapparat 1 weist ein in der Hand haltbares Gehäuse 2 und einen daranbefestigten Scherkopf 3 auf. Am Gehäuse 2 ist ein Schalter 4 zum Ein- und Ausschalten des Rasierapparats 1 angeordnet. DerScherkopf 3 weist ein Schersystem 5 auf, von dem inFig. 1 lediglich eine in einemHalterahmen 6angeordnete Scherfolie 7 sichtbar ist. -
Fig. 2 zeigt ein Ausführungsbeispiel eines erfindungsgemäß ausgebildeten Untermessers 8 in Seitenansicht. Eine zugehörige Schnittdarstellung ist inFig. 3 dargestellt. Das Untermesser 8 stellt einen weiteren Bestandteil des Schersystems 5 dar und liegt im montierten Zustand eng an der Innenseite der inFig. 1 dargestellten Scherfolie 7 an. Beim Betrieb des Rasierapparats 1 wird das Untermesser 8 relativ zur Scherfolie 7 in eine linear oszillierende Bewegung versetzt. Diese Bewegung führt dazu, daß Haare, die durch dieScherfolie 7 bis zum Untermesser 8 vordringen, vom Untermesser 8 erfaßt und in Zusammenwirkungmit der Scherfolie 7 durchtrennt werden.
- Fig. 1
- an embodiment of an electric shaver in side view,
- Fig. 2
- an embodiment of an inventively designed lower blade in side view,
- Fig. 3
- the bottom knife off
Fig. 2 in section, - Fig. 4
- an enlarged section
Fig. 2 in the area of one of the brackets, - FIGS. 5 and 6
- Further embodiments of the lower blade, wherein the brackets are fixed with two welding points on the axis, in one
Fig. 4 corresponding illustration and - Fig. 7 to 10
- Exemplary embodiments of the lower blade, wherein the holders are fixed to the axle with one welding point each, in one
Fig. 4 corresponding representation.
-
Fig. 1 shows an embodiment of an electric shaver 1 in side view. The razor 1 has a housing 2 durable in the hand and ashaving head 3 attached thereto. On the housing 2, a switch 4 for switching on and off of the shaver 1 is arranged. The shavinghead 3 has a shearing system 5, of which inFig. 1 only one arranged in a holdingframe 6shaving foil 7 is visible. -
Fig. 2 shows an embodiment of an inventively designed lower blade 8 in side view. An associated sectional view is inFig. 3 shown. The lower blade 8 is another component of the shear system 5 and is in the mounted state closely to the inside of inFig. 1 shownshear foil 7 at. During operation of the razor 1, the lower blade 8 is displaced relative to theshear foil 7 in a linear oscillating movement. This movement causes hair, which penetrate through theshear foil 7 to the lower blade 8, detected by the lower blade 8 and severed in cooperation with theshear foil 7.
Im Querschnitt ist das Untermesser 8 U-förmig ausgebildet und setzt sich aus einem ersten Schenkel 9, einem zweiten Schenkel 10 und ein zwischen den Schenkeln 9 und 10 angeordnetes Bogenstück 11 zusammen. In Längsrichtung des Untermessers 8 sind mehrere Einzelklingen 12 in regelmäßigen Abständen zueinander angeordnet. Die Einzelklingen 12 sind insbesondere scharfkantig ausgebildet. An jedem Schenkel 9 und 10 des Untermessers 8 sind je zwei Halterungen 13 ausgebildet, mit denen das Untermesser 8 an zwei Achsen 14 befestigt ist, die quer zur Längserstreckung des Untermessers 8 orientiert sind. Die Achsen 14 können Bestandteile eines ansonsten nicht figürlich dargestellten Trägers sein, der das Untermesser 8 mit einem Antrieb des Rasierapparats 1 koppelt, mit dessen Hilfe das Untermesser 8 in eine linear oszillierende Bewegung versetzt wird. Die Ausbildung der Halterungen 13 wird anhand von
Die Achse 14 ist aus Metall, vorzugsweise aus Stahl hergestellt. Das Untermesser 8 ist wenigstens im Bereich der Halterungen 13 aus Metall hergestellt. Vorzugsweise ist das Untermesser 8 insgesamt aus Metall hergestellt, wobei sich wiederum Stahl als Werkstoff besonders gut eignet. Die Materialstärke des Untermessers 8 beträgt weniger als 1 mm. Vorzugsweise wird eine Materialstärke von weniger als 0,5 mm gewählt. Beim dargestellten Ausführungsbeispiel beträgt die Materialstärke etwa 0,3 mm.The
Zur Fixierung der Halterung 13 an der Achse 14 sind die Halterung 13 und die Achse 14 miteinander verschweißt. Beim dargestellten Ausführungsbeispiel sind zwei Schweißpunkte 18 in der Nähe der freien Enden der Haltearme 15 in zueinander symmetrischen Positionen ausgebildet. Zwischen den Schweißpunkten 18 und dem Steg 16 weisen die Haltearme 15 jeweils einen bereichsweise reduzierten Materialquerschnitt auf.To fix the
Die Schweißpunkte 18 werden vorzugsweise durch Laser-Schweißen ausgebildet. Hierzu werden die dafür vorgesehenen Grenzbereiche zwischen den Haltearmen 15 und der Achse 14 kurzzeitig einem hochenergetischen Laserstrahl ausgesetzt. Dies führt zu einem lokalen Aufschmelzen des Materials im Bereich des Laserstrahls. Beim Abkühlen verbindet sich das geschmolzene Material der Haltearme 15 mit dem geschmolzenen Material der Achse 14. Das Aufschmelzen erfolgt in einer Zeitspanne von etwa 1 ms bis 10 ms und wird für beide Schweißpunkte 18 gleichzeitig oder kurzfristig hintereinander durchgeführt. Der Zeitversatz des Aufschmelzens zwischen den beiden Schweißpunkten 18 beträgt maximal etwa 1 ms, so daß das Material im Bereich des zweiten Schweißpunktes 18 bereits aufgeschmolzen ist, bevor das Material im ersten Schmelzpunkt 18 erstarrt ist. Das gleichzeitige Aufschmelzen im Bereich der beiden Schweißpunkte 18 kann beispielsweise mit Hilfe eines bifokalen Laserstrahls erreicht werden, der so justiert wird, daß je ein Fokus im Bereich je eines der beiden Schweißpunkte 18 ausgebildet wird. Beim Erstarren der aufgeschmolzenen Bereiche entstehen durch Volumenverkleinerung und Kontraktion der abkühlenden Schmelze Spannungen. Insbesondere entstehen Zugspannungen normal zur Hüllfläche des Schmelzvolumens, das den dargestellten Schweißpunkten 18 entspricht. Die Spannungen können bis zu einem gewissen Grad durch ein geringes Schmelzvolumen und einen kleinen Schweißspalt reduziert werden.The welding spots 18 are preferably formed by laser welding. For this purpose, the designated boundary areas between the
Im Rahmen der Erfindung sind mehrere Maßnahmen vorgesehen, mit denen sich die Spannungen auf sehr kleine Werte begrenzen lassen. Eine dieser Maßnahmen besteht darin, daß mehrere Schweißpunkte 18 in der beschriebenen Weise wenigstens annähernd gleichzeitig ausgebildet werden, so daß sich die Spannungen bei der Kontraktion des Schmelzvolumens teilweise aufheben. Beispielsweise können die vier Schweißpunkte 18, über welche die Achse 14 mit einer Halterung 13 des ersten Schenkels 9 und einer Halterung 13 des zweiten Schenkels 10 des Untermessers 8 verbunden ist, gleichzeitig oder annähernd gleichzeitig erzeugt werden.In the context of the invention, several measures are provided with which the voltages can be limited to very small values. One of these measures is that a plurality of
Eine zweite Maßnahme besteht darin, daß die einzelnen Schweißpunkte 18 bevorzugt so angeordnet werden, daß nach dem Abkühlen der Schmelze im Schweißspalt normal zur Hüllfläche des Schmelzvolumens eine Aufhebung der Spannungen erfolgen kann. Beim Ausführungsbeispiel der
Soweit dennoch Spannungen entstehen, können deren Auswirkung auf die Form des Untermessers 8 gemäß einer dritten Maßnahme dadurch begrenzt werden, daß sich die Halterungen 13 leichter verformen als das Untermesser 8. Dies wird durch die Gabelform der Halterungen 13 und den bereichsweise reduzierten Materialquerschnitt der Haltearme 15 erreicht.As far as tensions nevertheless arise, their effect on the shape of the lower blade 8 can be limited according to a third measure in that the
Besonders wirksam lassen sich die auf das Untermesser 8 einwirkenden Spannungen dadurch begrenzen, daß die beschriebenen Maßnahmen in Kombination angewendet werden. Es ist aber auch möglich, die Maßnahmen einzeln oder als Unterkombinationen anzuwenden. Die beschriebene Anordnung der Schweißpunkte 18 und das wenigstens annähernd gleichzeitige Aufschmelzen kommen bevorzugt in Kombination zur Anwendung. Weitere Ausführungsbeispiele hierzu sind in den
Bei den Ausführungsbeispielen der
Bei den Ausführungsbeispielen der
Bei allen Ausführungsbeispielen können die Schweißpunkte 18 nicht nur mit dem vorstehend beschriebenen Laser-Schweißen, sondern auch mit anderen Schweißverfahren hoher Engergiedichte, wie beispielsweise Mikroplasma- oder Elektronenstrahlschweißen, hergestellt werden. In all embodiments, 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.
Claims (17)
- A clipping system for an electric hair-cutting appliance (1), with a clipping blade (8) for cutting hair and a machine part (14), to which the clipping blade (8) is firmly connected, wherein the clipping blade (8) and the machine part (14) are connected to one another by means of at least one metal weld connection (18) and the clipping blade (8) has at least one holder (13) and the weld connection (18) is located in the area of the holder (13), characterized in that the holder (13) has a somewhat reduced material cross-section between the weld connection (18) and the clipping blade (8).
- The clipping system according to Claim 1, characterized in that the holder (13) is more easily deformable than the clipping blade (8).
- The clipping system according to either Claim 1 or Claim 2, characterized in that each holder (13) has multiple weld connections (18).
- The clipping system according to Claim 3, characterized in that the weld connections (18) are located such that tensions caused by the weld connections (18) are at least partially compensated for.
- The clipping system according to either Claim 3 or Claim 4, characterized in that the weld connections (18) are placed at points on the holder (13) that are symmetrical to one another.
- The clipping system according to any of the preceding claims, characterized in that the holder (13) is designed as a single piece with the clipping blade (8).
- The clipping system according to any of the preceding claims, characterized in that the holder (13) is connected to the clipping blade (8) by means of a stud (16).
- The clipping system according to any of the preceding claims, characterized in that the holder (13) partially encloses the machine part (14).
- The clipping system according to Claim 8, characterized in that the holder (13), with its surface (17) facing toward the machine part (14), follows the shape of the machine part (14), over the entire enclosure area.
- The clipping system according to Claim 9, characterized in that the holder (13), with its surface (17) facing toward the machine part (14), deviates somewhat from the shape of the machine part (14), particularly in an area adjacent to the weld connection (18), such that the distance between the holder (13) and the machine part (14) is increased in this area.
- The clipping system according to any of the preceding claims, characterized in that the holder (13) has at least one supporting arm (15).
- The clipping system according to any of the preceding claims, characterized in that the holder (13) has two, particularly symmetrically formed, support arms (15), in between which the machine part (14) is located.
- The clipping system according to any of the preceding claims, characterized in that the clipping blade (8) is designed as a bottom blade, which can be driven, particularly in an oscillating manner, via the machine part (14).
- The clipping system according to any of the preceding claims, characterized in that the clipping blade (8) has a U-shaped cross-section.
- The clipping system according to any of the preceding claims, characterized in that the clipping blade (8) has a material thickness of less than 1 mm, preferably less than 0.5 mm, and particularly around 0.3 mm.
- The clipping system according to any of the preceding claims, characterized in that an additional clipping blade (7) is provided, which interacts with the clipping blade (8).
- An electric hair-cutting appliance with at least one clipping system (5), characterized in that the clipping system (5) is designed in accordance with any of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005010244A DE102005010244A1 (en) | 2005-03-05 | 2005-03-05 | Shearing system for an electric hair trimmer |
PCT/EP2006/001345 WO2006094605A1 (en) | 2005-03-05 | 2006-02-15 | Clipping system for an electric hair-cutting appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1871575A1 EP1871575A1 (en) | 2008-01-02 |
EP1871575B1 true EP1871575B1 (en) | 2009-10-28 |
Family
ID=36390230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06723042A Active EP1871575B1 (en) | 2005-03-05 | 2006-02-15 | Clipping system for an electric hair-cutting appliance |
Country Status (7)
Country | Link |
---|---|
US (1) | US7895753B2 (en) |
EP (1) | EP1871575B1 (en) |
JP (1) | JP4870146B2 (en) |
CN (1) | CN101132888B (en) |
AT (1) | ATE446826T1 (en) |
DE (2) | DE102005010244A1 (en) |
WO (1) | WO2006094605A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005010244A1 (en) * | 2005-03-05 | 2006-09-07 | Braun Gmbh | Shearing system for an electric hair trimmer |
DE102008031135B4 (en) * | 2008-07-01 | 2014-11-20 | Braun Gmbh | Cutting device for removing hair |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT181527B (en) * | 1953-12-17 | 1955-03-25 | Gerhard Dipl Ing Heyek | Lower blade for the shaving head of dry razors |
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 (en) * | 1985-01-09 | 1988-07-08 | Seb Sa | KNIVES FOR RAZOR WITH GRID AND SUPPORT BEARING THESE KNIVES, METHOD FOR SHARPENING AND ASSEMBLING THESE KNIVES |
JPH0671060A (en) * | 1992-08-26 | 1994-03-15 | Matsushita Electric Works Ltd | Inner blade for reciprocation type electric razor and manufacture thereof |
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 |
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 (en) * | 1997-10-30 | 2007-04-25 | 산요덴키가부시키가이샤 | Electric shaver |
JP2002058887A (en) * | 2000-08-22 | 2002-02-26 | Matsushita Electric Works Ltd | Edge for electric razor |
JP4273786B2 (en) * | 2003-02-25 | 2009-06-03 | パナソニック電工株式会社 | Electric razor |
JP2005198795A (en) * | 2004-01-15 | 2005-07-28 | Izumi Products Co | Method of manufacturing cutter of reciprocating type electric razor and cutter |
JP4140558B2 (en) * | 2004-06-14 | 2008-08-27 | 松下電工株式会社 | Electric razor |
DE102005010244A1 (en) * | 2005-03-05 | 2006-09-07 | Braun Gmbh | Shearing system for an electric hair trimmer |
-
2005
- 2005-03-05 DE DE102005010244A patent/DE102005010244A1/en not_active Withdrawn
-
2006
- 2006-02-15 AT AT06723042T patent/ATE446826T1/en active
- 2006-02-15 JP JP2008500064A patent/JP4870146B2/en active Active
- 2006-02-15 CN CN2006800071706A patent/CN101132888B/en active Active
- 2006-02-15 WO PCT/EP2006/001345 patent/WO2006094605A1/en not_active Application Discontinuation
- 2006-02-15 DE DE502006005247T patent/DE502006005247D1/en active Active
- 2006-02-15 EP EP06723042A patent/EP1871575B1/en active Active
-
2007
- 2007-09-04 US US11/849,492 patent/US7895753B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP1871575A1 (en) | 2008-01-02 |
WO2006094605A1 (en) | 2006-09-14 |
US7895753B2 (en) | 2011-03-01 |
DE502006005247D1 (en) | 2009-12-10 |
US20080047146A1 (en) | 2008-02-28 |
DE102005010244A1 (en) | 2006-09-07 |
CN101132888A (en) | 2008-02-27 |
ATE446826T1 (en) | 2009-11-15 |
CN101132888B (en) | 2010-06-16 |
JP2008531229A (en) | 2008-08-14 |
JP4870146B2 (en) | 2012-02-08 |
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