EP0529406B1 - Dry shaver - Google Patents

Dry shaver Download PDF

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Publication number
EP0529406B1
EP0529406B1 EP92113717A EP92113717A EP0529406B1 EP 0529406 B1 EP0529406 B1 EP 0529406B1 EP 92113717 A EP92113717 A EP 92113717A EP 92113717 A EP92113717 A EP 92113717A EP 0529406 B1 EP0529406 B1 EP 0529406B1
Authority
EP
European Patent Office
Prior art keywords
shaving apparatus
dry shaving
inner cutters
coupling member
cutters
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.)
Expired - Lifetime
Application number
EP92113717A
Other languages
German (de)
French (fr)
Other versions
EP0529406A1 (en
Inventor
Hans-Eberhard Heintke
Gerhard Hildebrand
Manfred Ohle
Gunther Seidel
Klaus Ramspeck
Wolfgang Franke
Reinhold Eichhorn
Helmut Dürr
Gebhard Braun
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
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Filing date
Publication date
Application filed by Braun GmbH filed Critical Braun GmbH
Publication of EP0529406A1 publication Critical patent/EP0529406A1/en
Application granted granted Critical
Publication of EP0529406B1 publication Critical patent/EP0529406B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B26B19/048—Complete cutting head being movable
    • 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
    • B26B19/10—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly
    • B26B19/102—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly with a secondary cutting unit being translated or slid into an operating position

Definitions

  • the invention relates to a dry shaving apparatus with a pair of parallel, elongated shaving heads, the lower knife associated with the upper knife are arranged on a common coupling element which is coupled to a drive element of an electric drive system.
  • a dry shaver of the type mentioned is known from DE-C1 39 26 894.
  • the two elongated lower knives which run parallel to one another, are resiliently mounted on a common coupling piece in the vertical direction.
  • the coupling element consists of a base plate with two molded-on and thus always constant spacing of the two lower knives from each other, defining pot-like containers and container caps surrounding them in a pot-like manner.
  • a guide pin and a compression spring are provided within each of these containers for the vertical guidance of the container covers acted upon by the compression springs.
  • the lower knives are each articulated by means of a coupling piece and pivot pins arranged transversely to the longitudinal extent of the lower knives at the respective upper ends of the container lids.
  • the object of the invention is to improve the interaction of the proposed lower knife with an upper knife in a dry shaver of the type mentioned in the preamble of claim 1.
  • this object is achieved by a dry shaver according to claim 1.
  • the solution according to the invention ensures a better adaptation of the cutting elements relevant for a good cutting action, such as the provided lower knife and upper knife, and thus improves their cutting behavior.
  • the mobility of at least one of the lower knives on the coupling element transversely to the direction of oscillation makes it easier to remove and put on a shaving head frame equipped with an upper knife on the housing of the shaving apparatus.
  • the shaving head frame can be dimensioned smaller in its width extending transversely to the direction of oscillation of the lower knives, since after the shaving head frame has been placed on the housing of the shaving apparatus, the inner walls of the shaving head frame and then the upper knife, the or automatically move the movable lower knives into the contact position to the upper knife.
  • the coupling element has a bearing rod running transversely to the direction of vibration (S), on which at least one of the lower knives is slidably mounted.
  • stops are provided on the lower knife and on the coupling element to limit the sliding movement of the lower knife.
  • one of the lower knives is fixedly arranged on the coupling element and the second lower knife is slidably arranged on the bearing rod.
  • the lower knife is preferably slidably mounted on the bearing rod by means of a sliding element carrying the lower knife.
  • the stops are formed by at least one U-shaped recess provided in the coupling element and by retaining elements provided on the sliding elements and engaging therein.
  • the formation of interacting attacks by means of a corresponding Shape design of the coupling element and the sliding element causes a reduction in the manufacturing costs of the coupling element.
  • the bearing rod is preferably fastened in at least one wall provided on the coupling element.
  • the wall serving to fasten the bearing rod is provided as a stop for at least one of the slidably arranged lower knives.
  • the wall is provided for fastening one of the lower knives.
  • the lower knives are arched.
  • the resilient contact of the lower knives on the upper knife is ensured by the contact of a pressure tappet mounted against the pressure of a spring on the coupling element.
  • the pressure plunger and the spring are preferably arranged in the drive element.
  • the lower knives are coupled via the coupling element to the drive element of the electrical drive system so as to be pivotable about a pivot axis.
  • the lower knife is pivoted about the pivot axis Z by the action of a pivotably mounted upper knife on the lower knife.
  • Fig. 1 shows an electric shaver with a housing 1 and a shaving head system 2 pivotable about a pivot axis Z relative to the housing 1 and an on and off switch 4 which is displaceably mounted on the front side 3 and to which a slidably mounted long hair cutter 5 is assigned.
  • the two shaving head system 2 which runs parallel to one another and has an elongated design, consists of a shaving head frame 6 arranged on the housing 1, an upper knife 9 pivotably mounted between the end walls 7, 8 about the pivot axis Z, and - see FIG. 3 - two on the upper knife 9 adjacent lower knives 15, 16, which are coupled via a coupling element 11 to a drive system 12 arranged in the housing 1 both in terms of drive and also pivotable about the pivot axis Z, the pivoting movement of the lower knives 15, 16 due to the action of the pivotably mounted upper knife 9 on the lower knives 15, 16 is effected.
  • the shaving head frame 6 is removably attached to the housing 1 by means of a locking device.
  • Upper knife frame 42 and shaving head frame 6 are - see FIG. 2 - coupled to one another via their end walls 8 and 45 and 7 and 41 by means of bearing bolts 50, 51 penetrating through bearing bores 46, 47, 48, 49 and fastening of the bearing bolts 50, 51 serving for holding plates 56.
  • the center axis of the bearing bolts 50, 51 lies on the pivot axis Z.
  • the upper knife 9, which forms the two shaving heads SK with the lower knives 15, 16, has two curved shear surfaces 13, 14 that run parallel to the pivot axis Z.
  • the tangential plane connecting the curved shear surfaces 13 and 14 is an imaginary plane which is referred to as the shear plane SE - see FIG. 1a.
  • the shear surfaces 13 and 14 are formed by two shaving foils 131, 141 that are arched in the upper knife frame 42.
  • Each of the two shaving foils 131 and 141 is fastened to a web 421 provided within the upper knife frame 42 and extending parallel to the pivot axis Z and coupled to the opposite longitudinal side in each case with one of the two side walls 422, 423 of the upper knife frame 42 also running parallel to the pivot axis.
  • the lower knives 15, 16 consist of two parallel, arc-shaped knife blocks, which are arranged together on the coupling element 11.
  • the drive system 12 consists of a swing bridge 27 arranged in the housing 1, driven by a motor 25 by means of an eccentric 26, and coupling elements arranged on the swing bridge 27, such as a support plate 100 with fastening hooks 28, 29, by means of which a drive element 30 and a fastening hook 31, 32 having coupling sleeve 33 are attached to the support plate 100 via corresponding annular shoulders 34, 35.
  • the drive element 30 consists of a drive sleeve. At the end facing the lower cutters 15, 16, the drive sleeve 30 has a cylinder pot 36 with an annular outer bead 37 which is provided with a shape corresponding to a spherical cutout.
  • the outer bead 37 is in contact with the inner sides of the inner walls 17 and 18 and ensures, on the one hand, a transmission of the oscillating movement of the oscillating bridge 27 via the coupling element 11 to the lower knives 15, 16 and a pivoting movement enabling the lower cutters 15, 16 to be mounted on the drive sleeve 30.
  • a pressure ram 38 passing through the cylinder pot 36 is arranged in the cup-shaped drive sleeve 30.
  • a spring 40 acting on the pressure plunger 38 is arranged, by means of which the pressure plunger 38 is in constant contact with the arcuate course of the wall 241 of the recess 24 in the coupling element 11 which is concentric with the pivot axis Z. is held in order to transmit the spring force of the spring 40 to the lower knives 15, 16 for the purpose of a resilient contact of the lower knives 15, 16 on the upper knife 9.
  • the drive sleeve 30 surrounding coupling sleeve 33 engages with the fastening hooks 31 and 32 over the webs 22 and 23 provided on the outer walls 20, 21 of the coupling element 11, with a predetermined flexibility of the fastening hooks 31 and 32 making coupling and decoupling easy and easy to use at all times Lower knife 15, 16 with the coupling element 11 is guaranteed by the drive system.
  • the fastening hooks 28, 29 are likewise designed to be flexible and thus simplify the assembly and disassembly of the pressure ram 38, spring 40, drive sleeve 30 and coupling sleeve 33 on the swing bridge 27.
  • FIG. 3 shows a section through a shaving head frame 6, upper knife frame 42, lower knife 15, 16 and coupling element 11 and coupling sleeve 33 placed on the housing 1, the section running through the fastening hook 31 of the coupling sleeve 33 and the web 22 of the coupling element 11.
  • a latching cam 311 is provided on the latching hook 31. In the assembled state of the housing 1, the shaving head frame 6 and the upper knife frame 42, the latching cam 311 of the latching hook 31 is at a distance above the web 22 provided with a control curve 221 and a recess 222.
  • the distance A is established when the shaving head frame 6 is mounted on the Housing 1 automatically on, since the two lower knives 15, 16 arranged on the coupling element 11 are moved in the vertical direction downward over the associated shaving foils 131, 141 during assembly against the pressure of the pressure ram 38 acted upon by the spring 40.
  • Fig. 3a shows the partial section through the razor of FIG. 3 with a shaving head frame 6 removed from the housing 1.
  • the removal of the shaving head frame 6 from the housing 1 has the result that the pressure of the spring 40 against the wall 241 of the coupling element 11 Pressure plunger 38 moves upwards in the vertical direction V until, depending on the respective pivot position of the lower cutters 15, 16, the locking cams 311 follow Covering the distance A to the system on the control cam 221. Thereafter, the control cam 221 slides along the locking cam 311 using the spring tension of the spring 40 until the locking cam 311 snaps into the recess 222 provided in the control cam 221.
  • the recess 222 is provided in the center of the arc-shaped control cam 221, whereby after the latching cam 311 has been latched into the recess 222, the lower knife 10 assumes a centering position which is in and against the center of the predetermined pivoting range the clockwise pivotable lower knife 10 lies.
  • a control curve with a prismatic control surface, the prism surfaces of which open into a recess can also be provided - not shown.
  • the web 23 of the coupling element 11 and the second fastening hook 32 provided on the coupling sleeve 33 are designed in accordance with the previously described web 22 and fastening hook 31 and are provided offset from it by 180 °.
  • the lower knives 15, 16 with the coupling piece 11 and the pressure plunger 38 are moved downwards against the pressure of the spring 40 in the vertical direction via the upper knife 9 Locking cams 311, the fastening hooks 31 and 32 and the recesses 222 in the cam 221 locking formed inevitably is canceled, as shown in Fig. 3.
  • the lower knives 15, 16 together with the upper knife 9 can carry out a back and forth swiveling movement about the swiveling axis Z.
  • FIGS. 2, 3 and 3a Details of the arrangement of the lower knives 15, 16 on the coupling element 11 are shown in FIGS. 2, 3 and 3a and are explained in more detail below.
  • a bearing rod 110 is fastened transversely to the direction of vibration S of the lower knives 15, 16 or transversely to the axial direction of the pivot axis Z.
  • the lower knife 16 On the bearing rod 110, the lower knife 16 is mounted to move back and forth in the arrow directions F 1 and F 2, a sliding element 117 being slidably arranged on the bearing rod 110 being provided between a carrier carrying the knife blades of the lower knife and the coupling element 11.
  • a holding element 118 which extends downward and projects into a U-shaped recess 116 which is embedded in the coupling element 11.
  • the extending into the recess 116 side walls of the holding member 118 serve as stops 113 and 115 to limit the sliding movement of the lower knife 16 on the bearing rod 110.
  • the sliding path of the lower knife 16 on the bearing rod 110 in the direction of arrow F1 or F2 is by the respective stops 112th and 114, which are formed by the side walls of the U-shaped recess 116 in the exemplary embodiment shown.
  • the lower knife 16 is mounted on the bearing rod 110 in the direction of the arrow when the stop 113 bears against the stop 112 by the distance B which the stops 114 and 115 are in relation to one another .
  • the distance C that the stops 114 and 112 to each other, is dimensioned such that in a shaving head frame 6 placed on the housing 1 - see FIG. 3 - there is a gap between the stops 113 and the stop 112.
  • Such a dimensioning of the distance C ensures, due to the movable mounting of the lower knife 16 on the bearing rod 110, an optimal adaptation of the lower knife 16 to the shaving foil 131 of the upper knife 9.
  • both lower knives 15, 16 are slidably arranged on the bearing rod 110 in the arrow directions F1 and F2.
  • the bearing rod 110 can be fastened, for example, in a wall provided on the coupling element 11 between the lower cutters 15 and 16, the stops limiting the sliding movement of the lower cutters 15 and 16 on the one hand by holding elements formed on the slide elements of the lower cutters and on the other hand by the side walls of U. -shaped recesses, which are provided on both sides of the wall holding the bearing rod in the coupling element.
  • the shaving head frame 6, which is detachably coupled to the housing 1, is equipped with an upper knife 9 which forms two shaving heads SK and is fixed immovably in the shaving head frame.
  • the two lower knives are coupled via the coupling element 11 to the drive element 30 of the drive system 12 only for the transmission of the oscillating movement S, as a result of which all constructive measures serving to transmit a pivoting movement of the upper knife and the lower knife about the pivot axis Z are omitted.
  • On the coupling element 11, at least one of the lower knives 15, 16 is movably mounted on a slide rod, which was described above, in the arrow directions F 1 and F 2.

Abstract

The invention is directed to a dry shaving apparatus comprising a pair of parallel, elongate shaving heads having inner cutters operatively associated with an outer cutter and arranged on a common coupling member which is coupled to a drive member of an electric drive mechanism, wherein at least one of the inner cutters is movably coupled to the coupling member transversely to the oscillating direction of the inner cutters.

Description

Die Erfindung bezieht sich auf einen Trockenrasierapparat mit einem Paar von parallel zueinander verlaufenden, länglichen Scherköpfen, deren dem Obermesser zugeordneten Untermesser auf einem gemeinsamen Kupplungselement angeordnet sind, welches mit einem Antriebselement eines elektrischen Antriebssystems gekoppelt ist.The invention relates to a dry shaving apparatus with a pair of parallel, elongated shaving heads, the lower knife associated with the upper knife are arranged on a common coupling element which is coupled to a drive element of an electric drive system.

Ein Trockenrasierapparat der eingangs genannten Art ist aus der DE-C1 39 26 894 bekannt. Die beiden parallel zueinander verlaufenden, länglich ausgebildeten Untermesser sind auf einem gemeinsamen Kupplungsstück in vertikaler Richtung federnd gelagert. Das Kupplungselement besteht aus einer Bodenplatte mit zwei angeformten und somit einen stets gleichbleibenden Abstand der beiden Untermesser zueinander festlegenden, topfartigen Behältern und diese topfartig umgebenden Behälterdeckeln. Innerhalb dieser Behälter ist jeweils ein Führungsbolzen und eine Druckfeder vorgesehen zur vertikalen Führung der von den Druckfedern beaufschlagten Behälterdeckel. Die Untermesser sind jeweils mittels eines Kupplungsstückes und quer zur Längserstreckung der Untermesser angeordneten Gelenkbolzen an den jeweiligen oberen Enden der Behälterdeckel schwenkbar angelenkt.A dry shaver of the type mentioned is known from DE-C1 39 26 894. The two elongated lower knives, which run parallel to one another, are resiliently mounted on a common coupling piece in the vertical direction. The coupling element consists of a base plate with two molded-on and thus always constant spacing of the two lower knives from each other, defining pot-like containers and container caps surrounding them in a pot-like manner. A guide pin and a compression spring are provided within each of these containers for the vertical guidance of the container covers acted upon by the compression springs. The lower knives are each articulated by means of a coupling piece and pivot pins arranged transversely to the longitudinal extent of the lower knives at the respective upper ends of the container lids.

Aufgabe der Erfindung ist es, bei einem Trockenrasierapparat der im Oberbegriff des Anspruchs 1 genannten Art das Zusammenwirken der vorgesehenen Untermesser mit einem Obermesser zu verbessern.The object of the invention is to improve the interaction of the proposed lower knife with an upper knife in a dry shaver of the type mentioned in the preamble of claim 1.

Nach der Erfindung wird diese Aufgabe durch einen Trockenrasierapparat gemäß Anspruch 1 gelöst. Die Lösung nach der Erfindung gewährleistet eine bessere Anpassung der für eine gute Schneidwirkung relevanten Schneidelemente, wie der vorgesehenen Untermesser und Obermesser und verbessert somit deren Schneidverhalten. Die Bewegbarkeit von wenigstens einem der Untermesser auf dem Kupplungselement quer zur Schwingungsrichtung erleichtert das Abnehmen und Aufsetzen eines mit einem Obermesser ausgestatteten Scherkopfrahmens auf dem Gehäuse des Rasierapparates. Darüber hinaus kann unter Ausnutzung der Bewegbarkeit von wenigstens einem der Untermesser der Scherkopfrahmen in seiner sich quer zur Schwingungsrichtung der Untermesser erstreckenden Breite kleiner dimensioniert werden, da nach Aufsetzen des Scherkopfrahmens auf das Gehäuse des Rasierapparates die Innenwände des Scherkopfrahmens und anschließend das Obermesser, das bzw. die bewegbaren Untermesser automatisch in die Anlageposition zum Obermesser bewegen.According to the invention, this object is achieved by a dry shaver according to claim 1. The solution according to the invention ensures a better adaptation of the cutting elements relevant for a good cutting action, such as the provided lower knife and upper knife, and thus improves their cutting behavior. The mobility of at least one of the lower knives on the coupling element transversely to the direction of oscillation makes it easier to remove and put on a shaving head frame equipped with an upper knife on the housing of the shaving apparatus. In addition, using the mobility of at least one of the lower knives, the shaving head frame can be dimensioned smaller in its width extending transversely to the direction of oscillation of the lower knives, since after the shaving head frame has been placed on the housing of the shaving apparatus, the inner walls of the shaving head frame and then the upper knife, the or automatically move the movable lower knives into the contact position to the upper knife.

In weiterer Ausgestaltung der Erfindung weist das Kupplungselement eine quer zur Schwingungsrichtung (S) verlaufende Lagerstange auf, auf der wenigstens eines der Untermesser gleitbar gelagert ist.In a further embodiment of the invention, the coupling element has a bearing rod running transversely to the direction of vibration (S), on which at least one of the lower knives is slidably mounted.

Nach einer Ausführungsform der Erfindung sind an dem Untermesser und an dem Kupplungselement Anschläge zur Begrenzung der Gleitbewegung der Untermesser vorgesehen.According to one embodiment of the invention, stops are provided on the lower knife and on the coupling element to limit the sliding movement of the lower knife.

Nach einer weiteren Ausführungsform der Erfindung ist eines der Untermesser auf dem Kupplungselement fest angeordnet und das zweite Untermesser auf der Lagerstange gleitbar angeordnet.According to a further embodiment of the invention, one of the lower knives is fixedly arranged on the coupling element and the second lower knife is slidably arranged on the bearing rod.

Vorzugsweise ist das Untermesser mittels eines das Untermesser tragenden Gleitelementes auf der Lagerstange gleitbar gelagert.The lower knife is preferably slidably mounted on the bearing rod by means of a sliding element carrying the lower knife.

Nach einer bevorzugten Ausführungsform der Erfindung sind die Anschläge durch wenigstens eine im Kupplungselement vorgesehene, U-förmige Aussparung und durch in diese eingreifende, an den Gleitelementen vorgesehenen Halteelemente gebildet. Die Bildung von zusammenwirkenden Anschlägen mittels einer entsprechenden Formgestaltung des Kupplungselementes und des Gleitelementes bewirkt eine Reduzierung der Herstellkosten des Kupplungselementes.According to a preferred embodiment of the invention, the stops are formed by at least one U-shaped recess provided in the coupling element and by retaining elements provided on the sliding elements and engaging therein. The formation of interacting attacks by means of a corresponding Shape design of the coupling element and the sliding element causes a reduction in the manufacturing costs of the coupling element.

Vorzugsweise ist die Lagerstange in wenigstens einer am Kupplungselement vorgesehenen Wand befestigt. Nach einer vorteilhaften Ausbildung dieser Ausführungsform ist die der Befestigung der Lagerstange dienende Wand als Anschlag für wenigstens eines der gleitbar angeordneten Untermesser vorgesehen. Nach einer weiteren Ausführungsform der Erfindung ist die Wand zur Befestigung eines der Untermesser vorgesehen.The bearing rod is preferably fastened in at least one wall provided on the coupling element. According to an advantageous embodiment of this embodiment, the wall serving to fasten the bearing rod is provided as a stop for at least one of the slidably arranged lower knives. According to a further embodiment of the invention, the wall is provided for fastening one of the lower knives.

Nach einer weiteren Ausführungsform der Erfindung sind die Untermesser bogenförmig ausgebildet.According to a further embodiment of the invention, the lower knives are arched.

Nach einer bevorzugten Ausführungsform ist die federnde Anlage der Untermesser an dem Obermesser durch Anlage eines gegen den Druck einer Feder verschiebbar gelagerten Andruckstößels an dem Kupplungselement gewährleistet. Vorzugsweise sind in weiterer Ausgestaltung dieser Ausführungsform der Andruckstößel und die Feder im Antriebselement angeordnet.According to a preferred embodiment, the resilient contact of the lower knives on the upper knife is ensured by the contact of a pressure tappet mounted against the pressure of a spring on the coupling element. In a further embodiment of this embodiment, the pressure plunger and the spring are preferably arranged in the drive element.

Nach einer besonders vorteilhaften Ausführungsform der Erfindung sind die Untermesser über das Kupplungselement mit dem Antriebselement des elektrischen Antriebssystems um eine Schwenkachse schwenkbar gekoppelt. Bei dieser Ausführungsform erfolgt die Schwenkbewegung der Untermesser um die Schwenkachse Z durch Einwirkung eines schwenkbar gelagerten Obermessers auf die Untermesser.According to a particularly advantageous embodiment of the invention, the lower knives are coupled via the coupling element to the drive element of the electrical drive system so as to be pivotable about a pivot axis. In this embodiment, the lower knife is pivoted about the pivot axis Z by the action of a pivotably mounted upper knife on the lower knife.

Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung und den Zeichnungen, in denen ein bevorzugtes Ausführungsbeispiel dargestellt ist. Es zeigen:

Fig. 1
einen Rasierapparat mit Scherkopfrahmen und schwenkbar gelagertem Obermesserrahmen in perspektivischer Darstellung;
Fig. 1a
ein Obermesser mit zwei parallel zueinander verlaufenden, bogenförmigen Scherflächen;
Fig. 2
einen Schnitt durch einen Scherkopfrahmen, Obermesserrahmen und Antriebssystem;
Fig. 3
einen Schnitt durch ein Kupplungselement, Scherkopfrahmen mit schwenkbar gelagertem Obermesserrahmen;
Fig. 3a
einen Schnitt nach Fig. 3 ohne Scherkopfrahmen.
Further advantages and details of the invention emerge from the following description and the drawings, in which a preferred exemplary embodiment is shown. Show it:
Fig. 1
a shaver with a shaving head frame and pivotally mounted upper knife frame in a perspective view;
Fig. 1a
an upper knife with two parallel, curved shear surfaces;
Fig. 2
a section through a shaving head frame, upper knife frame and drive system;
Fig. 3
a section through a coupling element, shaving head frame with pivotably mounted upper knife frame;
Fig. 3a
a section of FIG. 3 without a shaving head frame.

Fig. 1 zeigt einen elektrischen Rasierapparat mit einem Gehäuse 1 und einem um eine Schwenkachse Z relativ zum Gehäuse 1 schwenkbaren Scherkopfsystem 2 sowie einen in der Frontseite 3 verschiebbar gelagerten Ein- und Ausschalter 4, dem ein verschiebbar gelagerter Langhaarschneider 5 zugeordnet ist.Fig. 1 shows an electric shaver with a housing 1 and a shaving head system 2 pivotable about a pivot axis Z relative to the housing 1 and an on and off switch 4 which is displaceably mounted on the front side 3 and to which a slidably mounted long hair cutter 5 is assigned.

Das zwei parallel zueinander verlaufende, länglich ausgebildete Scherköpfe SK aufweisende Scherkopfsystem 2 besteht aus einem auf dem Gehäuse 1 angeordneten Scherkopfrahmen 6, einem zwischen den Stirnseitenwänden 7, 8 um die Schwenkachse Z schwenkbar gelagerten Obermesser 9, sowie - siehe Fig. 3 - zwei am Obermesser 9 anliegenden Untermessern 15, 16, die über ein Kupplungselement 11 mit einem im Gehäuse 1 angeordneten Antriebssystem 12 sowohl antriebsmäßig als auch um die Schwenkachse Z schwenkbar gekoppelt sind, wobei die Schwenkbewegung der Untermesser 15, 16 durch Einwirkung des schwenkbar gelagerten Obermessers 9 auf die Untermesser 15, 16 bewirkt wird.The two shaving head system 2, which runs parallel to one another and has an elongated design, consists of a shaving head frame 6 arranged on the housing 1, an upper knife 9 pivotably mounted between the end walls 7, 8 about the pivot axis Z, and - see FIG. 3 - two on the upper knife 9 adjacent lower knives 15, 16, which are coupled via a coupling element 11 to a drive system 12 arranged in the housing 1 both in terms of drive and also pivotable about the pivot axis Z, the pivoting movement of the lower knives 15, 16 due to the action of the pivotably mounted upper knife 9 on the lower knives 15, 16 is effected.

Der Scherkopfrahmen 6 ist auf dem Gehäuse 1 mittels einer Verriegelungseinrichtung abnehmbar befestigt. Obermesserrahmen 42 und Scherkopfrahmen 6 sind - siehe Fig. 2 - über deren Stirnseitenwände 8 und 45 sowie 7 und 41 mittels Lagerbohrungen 46, 47, 48, 49 durchsetzende Lagerbolzen 50, 51 sowie der Befestigung der Lagerbolzen 50, 51 dienenden Halteplatten 56 miteinander gekoppelt. Die Mittenachse der Lagerbolzen 50, 51 liegt auf der Schwenkachse Z.The shaving head frame 6 is removably attached to the housing 1 by means of a locking device. Upper knife frame 42 and shaving head frame 6 are - see FIG. 2 - coupled to one another via their end walls 8 and 45 and 7 and 41 by means of bearing bolts 50, 51 penetrating through bearing bores 46, 47, 48, 49 and fastening of the bearing bolts 50, 51 serving for holding plates 56. The center axis of the bearing bolts 50, 51 lies on the pivot axis Z.

Das mit den Untermessern15, 16 die beiden Scherköpfe SK bildende Obermesser 9 weist zwei parallel zur Schwenkachse Z verlaufende, bogenförmig ausgebildete Scherflächen 13, 14 auf. Die die bogenförmig ausgebildeten Scherflächen 13 und 14 verbindende Tangentialebene ist eine gedachte Ebene, die als Scherebene SE bezeichnet ist - siehe Fig. 1a. Die Scherflächen 13 und 14 werden - wie aus Fig. 3 ersichtlich - durch zwei im Obermesserrahmen 42 gewölbt eingespannte Scherfolien 131, 141 gebildet. Jede der beiden Scherfolien 131 und 141 ist an einem innerhalb des Obermesserrahmens 42 vorgesehenen, parallel zur Schwenkachse Z verlaufenden Steg 421 befestigt und mit der jeweils entgegengesetzten Längsseite mit einer der beiden ebenfalls parallel zur Schwenkachse verlaufenden Seitenwände 422, 423 des Obermesserrahmens 42 gekoppelt.The upper knife 9, which forms the two shaving heads SK with the lower knives 15, 16, has two curved shear surfaces 13, 14 that run parallel to the pivot axis Z. The tangential plane connecting the curved shear surfaces 13 and 14 is an imaginary plane which is referred to as the shear plane SE - see FIG. 1a. As can be seen from FIG. 3, the shear surfaces 13 and 14 are formed by two shaving foils 131, 141 that are arched in the upper knife frame 42. Each of the two shaving foils 131 and 141 is fastened to a web 421 provided within the upper knife frame 42 and extending parallel to the pivot axis Z and coupled to the opposite longitudinal side in each case with one of the two side walls 422, 423 of the upper knife frame 42 also running parallel to the pivot axis.

Die Untermesser 15, 16 bestehen nach einer in Fig. 3 dargestellten Ausführungsform aus zwei parallel zueinander verlaufenden, bogenförmig ausgebildeten Messerblöcken, die gemeinsam auf dem Kupplungselement 11 angeordnet sind.According to an embodiment shown in FIG. 3, the lower knives 15, 16 consist of two parallel, arc-shaped knife blocks, which are arranged together on the coupling element 11.

Auf der dem Antriebssystem 12 zugewandten Seite sind - wie aus Fig. 2 ersichtlich - an dem Kupplungselement 11 vier parallel zueinander verlaufende Wände vorgesehen, wobei die sich gegenüberliegenden Innenwände 17 und 18 eine U-förmige Aussparung 19 bilden und die beiden Außenwände 20, 21 jeweils mit einem nach außen gerichteten Steg 22, 23 versehen sind. In der U-förmigen Aussparung 19 ist eine weitere U-förmige Aussparung 24 mit einem auf die Schwenkbewegung des Obermessers 9 um die Schwenkachse Z abgestimmten, bogenförmigen Verlauf der Wand 241 vorgesehen.On the side facing the drive system 12, as can be seen from FIG. 2, four walls running parallel to one another are provided on the coupling element 11, the opposite inner walls 17 and 18 forming a U-shaped recess 19 and the two outer walls 20, 21 in each case with an outside directed web 22, 23 are provided. In the U-shaped recess 19 there is a further U-shaped recess 24 with an arcuate course of the wall 241 which is matched to the pivoting movement of the upper knife 9 about the pivot axis Z.

Das Antriebssystem 12 besteht aus einer im Gehäuse 1 angeordneten, von einem Motor 25 mittels eines Exzenters 26 angetriebenen Schwingbrücke 27 sowie auf der Schwingbrücke 27 angeordneten Kupplungselementen, wie einer Tragplatte 100 mit Befestigungshaken 28, 29, mittels denen ein Antriebselement 30 und eine Befestigungshaken 31, 32 aufweisende Kupplungshülse 33 über entsprechende ringförmige Absätze 34, 35 auf der Tragplatte 100 befestigt sind. Das Antriebselement 30 besteht im dargestellten Aus- führungsbeispiel aus einer Antriebshülse. Die Antriebshülse 30 weist an dem den Untermessern 15, 16 zugewandten Ende einen Zy- lindertopf 36 mit einem ringförmigen Außenwulst 37 der mit einer einem Kugelausschnitt entsprechenden Formgebung versehen ist. Im gekoppelten Zustand des Kupplungselementes 11 mit der An- triebshülse 30 befindet sich der Außenwulst 37 in Anlage an den Innenseiten der Innenwände 17 und 18 und gewährleistet einerseits eine Übertragung der Schwingbewegung der Schwingbrücke 27 über das Kupplungselement 11 auf die Untermesser 15, 16 sowie eine Schwenkbewegungen ermöglichende Lagerung der Untermesser 15, 16 auf der Antriebshülse 30. In der topfförmig ausgebildeten An- triebshülse 30 ist ein den Zylindertopf 36 durchsetzender An- druckstößel 38 angeordnet. Zwischen der Oberseite 39 der Schwing- brücke 27 und dem Andruckstößel 38 ist eine auf den Andruckstößel 38 einwirkende Feder 40 angeordnet, mittels der der Andruckstößel 38 in ständiger Anlage an dem bogenförmigen Verlauf der Wand 241 der konzentrisch zur Schwenkachse Z verlaufenden Aussparung 24 im Kupplungselement 11 gehalten wird, um die Federkraft der Feder 40 auf die Untermesser 15, 16 zu übertragen zum Zwecke einer federn- den Anlage der Untermesser 15, 16 am Obermesser 9. Die die Antriebshülse 30 umgebende Kupplungshülse 33 greift mit den Befestigungshaken 31 und 32 über die an den Außenwänden 20, 21 des Kupplungselementes 11 vorgesehenen Stege 22 und 23, wobei mittels einer vorgegebenen Flexibilität der Befestigungshaken 31 und 32 eine jederzeit leicht und einfach zu handhabende Koppelung bzw. Entkoppelung der Untermesser 15, 16 mit dem Kupplungselement 11 vom Antriebssystem gewährleistet ist. Die Befestigungshaken 28, 29 sind ebenfalls flexibel ausgebildet und vereinfachen somit die Montage sowie Demontage von Andruckstößel 38, Feder 40, Antriebshülse 30 und Kupplungshülse 33 auf der Schwingbrücke 27.The drive system 12 consists of a swing bridge 27 arranged in the housing 1, driven by a motor 25 by means of an eccentric 26, and coupling elements arranged on the swing bridge 27, such as a support plate 100 with fastening hooks 28, 29, by means of which a drive element 30 and a fastening hook 31, 32 having coupling sleeve 33 are attached to the support plate 100 via corresponding annular shoulders 34, 35. In the exemplary embodiment shown, the drive element 30 consists of a drive sleeve. At the end facing the lower cutters 15, 16, the drive sleeve 30 has a cylinder pot 36 with an annular outer bead 37 which is provided with a shape corresponding to a spherical cutout. In the coupled state of the coupling element 11 with the drive sleeve 30, the outer bead 37 is in contact with the inner sides of the inner walls 17 and 18 and ensures, on the one hand, a transmission of the oscillating movement of the oscillating bridge 27 via the coupling element 11 to the lower knives 15, 16 and a pivoting movement enabling the lower cutters 15, 16 to be mounted on the drive sleeve 30. A pressure ram 38 passing through the cylinder pot 36 is arranged in the cup-shaped drive sleeve 30. Between the upper side 39 of the swing bridge 27 and the pressure plunger 38, a spring 40 acting on the pressure plunger 38 is arranged, by means of which the pressure plunger 38 is in constant contact with the arcuate course of the wall 241 of the recess 24 in the coupling element 11 which is concentric with the pivot axis Z. is held in order to transmit the spring force of the spring 40 to the lower knives 15, 16 for the purpose of a resilient contact of the lower knives 15, 16 on the upper knife 9. The drive sleeve 30 surrounding coupling sleeve 33 engages with the fastening hooks 31 and 32 over the webs 22 and 23 provided on the outer walls 20, 21 of the coupling element 11, with a predetermined flexibility of the fastening hooks 31 and 32 making coupling and decoupling easy and easy to use at all times Lower knife 15, 16 with the coupling element 11 is guaranteed by the drive system. The fastening hooks 28, 29 are likewise designed to be flexible and thus simplify the assembly and disassembly of the pressure ram 38, spring 40, drive sleeve 30 and coupling sleeve 33 on the swing bridge 27.

Fig. 3 zeigt einen Schnitt durch einen auf dem Gehäuse 1 aufgesetzten Scherkopfrahmen 6, Obermesserrahmen 42, Untermesser 15, 16 sowie Kupplungselement 11 und Kupplungshülse 33, wobei der Schnitt durch den Befestigungshaken 31 der Kupplungshülse 33 und den Steg 22 des Kupplungselementes 11 verläuft. An dem Rasthaken 31 ist ein Rastnocken 311 vorgesehen. Im montierten Zustand von Gehäuse 1, Scherkopfrahmen 6 und Obermesserrahmen 42 befindet sich der Rastnocken 311 des Rasthakens 31 in einem Abstand oberhalb des mit einer Steuerkurve 221 und einer Ausnehmung 222 versehenen Steges 22. Der Abstand A stellt sich bei der Montage des Scherkopfrahmens 6 auf dem Gehäuse 1 automatisch ein, da die beiden auf dem Kupplungselement 11 angeordneten Untermesser 15, 16 über die zugeordneten Scherfolien 131, 141 bei der Montage gegen den Druck des von der Feder 40 beaufschlagten Andruckstößels 38 in vertikaler Richtung nach unten bewegt werden.3 shows a section through a shaving head frame 6, upper knife frame 42, lower knife 15, 16 and coupling element 11 and coupling sleeve 33 placed on the housing 1, the section running through the fastening hook 31 of the coupling sleeve 33 and the web 22 of the coupling element 11. A latching cam 311 is provided on the latching hook 31. In the assembled state of the housing 1, the shaving head frame 6 and the upper knife frame 42, the latching cam 311 of the latching hook 31 is at a distance above the web 22 provided with a control curve 221 and a recess 222. The distance A is established when the shaving head frame 6 is mounted on the Housing 1 automatically on, since the two lower knives 15, 16 arranged on the coupling element 11 are moved in the vertical direction downward over the associated shaving foils 131, 141 during assembly against the pressure of the pressure ram 38 acted upon by the spring 40.

Fig. 3a zeigt den Teilschnitt durch den Rasierapparat nach Fig. 3 mit einem vom Gehäuse 1 abgenommenem Scherkopfrahmen 6. Die Abnahme des Scherkopfrahmens 6 vom Gehäuse 1 hat zur Folge, daß der unter dem Druck der Feder 40 an der Wand 241 des Kupplungselements 11 anliegende Andruckstößel 38 sich in vertikaler Richtung V nach oben bewegt, bis in Abhängigkeit von der jeweiligen Schwenkstellung der Untermesser 15, 16 der Rastnocken 311 nach Zurücklegen des Abstandes A zur Anlage an die Steuerkurve 221 gelangt. Danach gleitet die Steuerkurve 221 unter Ausnutzung der Federspannung der Feder 40 an dem Rastnocken 311 entlang, bis der Rastnocken 311 in die in der Steuerkurve 221 vorgesehenen Ausnehmung 222 einrastet. In dem in Fig. 3a dargestellten Ausführungsbeispiel ist die Ausnehmung 222 in der Mitte der bogenförmig ausgebildeten Steuerkurve 221 vorgesehen, wodurch nach Einrastung des Rastnockens 311 in die Ausnehmung 222 das Untermesser 10 eine Zentrierstellung einnimmt, die in der Mitte des vorgegebenen Schwenkbereiches des in und entgegen dem Uhrzeigersinn hin und her schwenkbaren Untermessers 10 liegt. Anstelle einer bogenförmig ausgebildeten Steuerkurve 221 kann auch eine Steuerkurve mit einer prismatisch ausgebildeten Steuerfläche, deren Prismaflächen in eine Ausnehmung einmünden, vorgesehen werden - nicht dargestellt.Fig. 3a shows the partial section through the razor of FIG. 3 with a shaving head frame 6 removed from the housing 1. The removal of the shaving head frame 6 from the housing 1 has the result that the pressure of the spring 40 against the wall 241 of the coupling element 11 Pressure plunger 38 moves upwards in the vertical direction V until, depending on the respective pivot position of the lower cutters 15, 16, the locking cams 311 follow Covering the distance A to the system on the control cam 221. Thereafter, the control cam 221 slides along the locking cam 311 using the spring tension of the spring 40 until the locking cam 311 snaps into the recess 222 provided in the control cam 221. In the embodiment shown in Fig. 3a, the recess 222 is provided in the center of the arc-shaped control cam 221, whereby after the latching cam 311 has been latched into the recess 222, the lower knife 10 assumes a centering position which is in and against the center of the predetermined pivoting range the clockwise pivotable lower knife 10 lies. Instead of an arc-shaped control curve 221, a control curve with a prismatic control surface, the prism surfaces of which open into a recess, can also be provided - not shown.

Der Steg 23 des Kupplungselementes 11 sowie der an der Kupplungshülse 33 vorgesehene zweite Befestigungshaken 32 sind entsprechend dem zuvor beschriebenen Steg 22 und Befestigungshaken 31 ausgebildet und um 180° versetzt zu diesem vorgesehen.The web 23 of the coupling element 11 and the second fastening hook 32 provided on the coupling sleeve 33 are designed in accordance with the previously described web 22 and fastening hook 31 and are provided offset from it by 180 °.

Die sich bei Abnahme des Scherkopfrahmens 6 vom Gehäuse 1 unter dem Druck der auf den Andruckstößel 38 einwirkenden Feder 40 zwangsläufig einstellende Überführung und Arretierung der Untermesser 15, 16 in der dargestellten Zentrierstellung ermöglicht eine einfache und leichte Reinigung der mit dem Antriebssystem gekoppelten Untermesser 15, 16 sowie eine leichte Montage des mit einem schwenkbar gelagerten Obermesser 9 ausgestalteten Scherkopfrahmens 6 auf dem Gehäuse 1.When the shaving head frame 6 is removed from the housing 1 under the pressure of the spring 40 acting on the pressure plunger 38, the transfer and locking of the lower knives 15, 16 in the centering position shown enables simple and easy cleaning of the lower knives 15, 16 coupled to the drive system as well as easy mounting of the shaving head frame 6, which is designed with a pivotably mounted upper knife 9, on the housing 1.

Durch Aufsetzen des Scherkopfrahmens 6 auf das Gehäuse 1 werden über das Obermesser 9 die Untermesser 15, 16 mit dem Kupplungsstück 11 sowie der Andruckstößel 38 gegen den Druck der Feder 40 in vertikaler Richtung nach unten bewegt, wobei die durch die Rastnocken 311, die Befestigungshaken 31 und 32 und die Ausnehmungen 222 in den Steuerkurven 221 gebildete Arretierung zwangsläufig aufgehoben wird, wie dies in Fig. 3 dargestellt ist. In diesem Zustand können die Untermesser 15, 16 zusammen mit dem Obermesser 9 ungehindert eine hin- und hergehende Schwenkbewegung um die Schwenkachse Z ausführen.By placing the shaving head frame 6 on the housing 1, the lower knives 15, 16 with the coupling piece 11 and the pressure plunger 38 are moved downwards against the pressure of the spring 40 in the vertical direction via the upper knife 9 Locking cams 311, the fastening hooks 31 and 32 and the recesses 222 in the cam 221 locking formed inevitably is canceled, as shown in Fig. 3. In this state, the lower knives 15, 16 together with the upper knife 9 can carry out a back and forth swiveling movement about the swiveling axis Z.

Einzelheiten der Anordnung der Untermesser 15, 16 auf dem Kupplungselement 11 sind in den Figuren 2, 3 und 3a dargestellt und werden im folgenden näher erläutert. In der Wand 119 des Kupplungselementes 11 ist eine quer zur Schwingungsrichtung S der Untermesser 15, 16 bzw. quer zur Achsrichtung der Schwenkachse Z verlaufende Lagerstange 110 befestigt. Auf der Lagerstange 110 ist das Untermesser 16 in den Pfeilrichtungen F₁ bzw. F₂ hin und her bewegbar gelagert, wobei zwischen einem die Messerblätter des Untermessers tragenden Träger und dem Kupplungselement 11 ein auf der Lagerstange 110 gleitbar angeordnetes Gleitelement 117 vorgesehen ist. An dem Gleitelement 117 ist ein sich nach unten erstreckendes Halteelement 118 vorgesehen, das in eine im Kupplungselement 11 eingelassene, U-förmige Aussparung 116 hineinragt. Die sich in die Aussparung 116 erstreckenden Seitenwände des Halteelementes 118 dienen als Anschlag 113 und 115 zur Begrenzung der Gleitbewegung des Untermessers 16 auf der Lagerstange 110. Der Gleitweg des Untermessers 16 auf der Lagerstange 110 in Pfeilrichtung F₁ bzw. F₂ wird durch die jeweiligen Anschläge 112 und 114 begrenzt, die im dargestellten Ausführungsbeispiel durch die Seitenwände der U-förmigen Aussparung 116 gebildet werden.Details of the arrangement of the lower knives 15, 16 on the coupling element 11 are shown in FIGS. 2, 3 and 3a and are explained in more detail below. In the wall 119 of the coupling element 11, a bearing rod 110 is fastened transversely to the direction of vibration S of the lower knives 15, 16 or transversely to the axial direction of the pivot axis Z. On the bearing rod 110, the lower knife 16 is mounted to move back and forth in the arrow directions F 1 and F 2, a sliding element 117 being slidably arranged on the bearing rod 110 being provided between a carrier carrying the knife blades of the lower knife and the coupling element 11. Provided on the sliding element 117 is a holding element 118 which extends downward and projects into a U-shaped recess 116 which is embedded in the coupling element 11. The extending into the recess 116 side walls of the holding member 118 serve as stops 113 and 115 to limit the sliding movement of the lower knife 16 on the bearing rod 110. The sliding path of the lower knife 16 on the bearing rod 110 in the direction of arrow F₁ or F₂ is by the respective stops 112th and 114, which are formed by the side walls of the U-shaped recess 116 in the exemplary embodiment shown.

Wie aus Fig. 3a ersichtlich, ist bei einem vom Gehäuse 1 abgenommenen Scherkopfrahmen 6 das Untermesser 16 bei Anlage des Anschlages 113 an dem Anschlag 112 um den Abstand B, den die Anschläge 114 und 115 zueinander einnehmen, auf der Lagerstange 110 in Pfeilrichtung bewegbar gelagert. Der Abstand C, den die Anschläge 114 und 112 zueinander einnehmen, ist derart bemessen, daß bei einem auf dem Gehäuse 1 aufgesetzten Scherkopfrahmen 6 - siehe Fig. 3 - ein Spalt zwischen den Anschlägen 113 und dem Anschlag 112 vorhanden ist. Eine derartige Bemessung des Abstandes C gewährleistet aufgrund der bewegbaren Lagerung des Untermessers 16 auf der Lagerstange 110 eine optimale Anpassung des Untermessers 16 an die Scherfolie 131 des Obermessers 9.As can be seen from FIG. 3a, with a shaving head frame 6 removed from the housing 1, the lower knife 16 is mounted on the bearing rod 110 in the direction of the arrow when the stop 113 bears against the stop 112 by the distance B which the stops 114 and 115 are in relation to one another . The distance C that the stops 114 and 112 to each other, is dimensioned such that in a shaving head frame 6 placed on the housing 1 - see FIG. 3 - there is a gap between the stops 113 and the stop 112. Such a dimensioning of the distance C ensures, due to the movable mounting of the lower knife 16 on the bearing rod 110, an optimal adaptation of the lower knife 16 to the shaving foil 131 of the upper knife 9.

Nach einem weiteren - nicht dargestellten - Ausführungsbeispiel sind beide Untermesser 15, 16 auf der Lagerstange 110 in den Pfeilrichtungen F₁ und F₂ gleitend angeordnet. Die Lagerstange 110 kann bei einer derartigen Ausführungsform beispielsweise in einer am Kupplungselement 11 zwischen den Untermessern 15 und 16 vorgesehenen Wand befestigt wobei die die Gleitbewegung der Untermesser 15 und 16 begrenzenden Anschläge einerseits durch an den Gleitelementen der Untermesser angeformte Halteelemente und andererseits durch die Seitenwände von U-förmigen Aussparungen, die beiderseits der die Lagerstange haltenden Wand in dem Kupplungselement vorgesehen sind, gebildet werden.According to another - not shown - embodiment, both lower knives 15, 16 are slidably arranged on the bearing rod 110 in the arrow directions F₁ and F₂. In such an embodiment, the bearing rod 110 can be fastened, for example, in a wall provided on the coupling element 11 between the lower cutters 15 and 16, the stops limiting the sliding movement of the lower cutters 15 and 16 on the one hand by holding elements formed on the slide elements of the lower cutters and on the other hand by the side walls of U. -shaped recesses, which are provided on both sides of the wall holding the bearing rod in the coupling element.

Nach einem weiteren Ausführungsbeispiel - nicht dargestellt - ist der mit dem Gehäuse 1 abnehmbar gekoppelte Scherkopfrahmen 6 mit einem zwei Scherköpfe SK bildenden Obermesser 9 ausgestattet, das unbewegbar im Scherkopfrahmen befestigt ist. Demzufolge sind die beiden Untermesser über das Kupplungselement 11 mit dem Antriebselement 30 des Antriebssystems 12 nur zur Übertragung der Schwingbewegung S gekoppelt, wodurch sämtliche zur Übertragung einer Schwenkbewegung von Obermesser und Untermesser um die Schwenkachse Z dienenden konstruktiven Maßnahmen entfallen. Auf dem Kupplungselement 11 ist wenigstens eines der Untermesser 15, 16 auf einer Gleitstange, die zuvor beschrieben, in den Pfeilrichtungen F₁ bzw. F₂ bewegbar gelagert.According to a further exemplary embodiment - not shown - the shaving head frame 6, which is detachably coupled to the housing 1, is equipped with an upper knife 9 which forms two shaving heads SK and is fixed immovably in the shaving head frame. Accordingly, the two lower knives are coupled via the coupling element 11 to the drive element 30 of the drive system 12 only for the transmission of the oscillating movement S, as a result of which all constructive measures serving to transmit a pivoting movement of the upper knife and the lower knife about the pivot axis Z are omitted. On the coupling element 11, at least one of the lower knives 15, 16 is movably mounted on a slide rod, which was described above, in the arrow directions F 1 and F 2.

Claims (14)

  1. A dry shaving apparatus comprising a pair of parallel, elongate shaving heads (14, 15) whose inner cutters (16, 17) which are operatively associated with an outer cutter (18) are arranged on a common coupling member (19) which is coupled to a drive member (47) of an electric drive mechanism for the purpose of performing a reciprocating motion in a direction parallel to the longitudinal direction of the shaving heads, characterized in that at least one of the inner cutters (16, 17) is slidably coupled to the coupling member (19) in such a fashion as to be movable transversely to the oscillating direction of the inner cutters (16, 17) and essentially parallel to a shaving plane determined by the outer cutter (18).
  2. The dry shaving apparatus as claimed in claim 1, characterized in that the coupling member (11) includes a bearing rod (110) which extends transversely to the oscillating direction (S) and has slidably mounted thereon at least one of the inner cutters (15, 16).
  3. The dry shaving apparatus as claimed in any one of the preceding claims, characterized in that abutment stops (112, 113, 114, 115) for limiting the sliding motion of the inner cutters (15, 16) are provided on the inner cutter (15, 16) and on the coupling member (11).
  4. The dry shaving apparatus as claimed in any one of the preceding claims, characterized in that one of the inner cutters (15, 16) is fixedly arranged on the coupling member (11) while the second inner cutter (15, 16) is slidably arranged on the bearing rod (110).
  5. The dry shaving apparatus as claimed in any one of the preceding claims, characterized in that the inner cutter (15, 16) is slidably mounted on the bearing rod (110) by means of a sliding element (117) carrying the inner cutter.
  6. The dry shaving apparatus as claimed in any one of the preceding claims, characterized in that the abutment stops (112, 113, 114, 115) are formed by at least one U-shaped recess (116) provided in the coupling member and by engaging holding elements (118) provided on the sliding elements (117).
  7. The dry shaving apparatus as claimed in any one of the preceding claims, characterized in that the bearing rod (110) is secured in at least one wall (119) provided on the coupling member (11).
  8. The dry shaving apparatus as claimed in claim 7, characterized in that the wall (119) serving to secure the bearing rod (110) is provided as an abutment stop (114) for at least one of the slidable inner cutters (15, 16).
  9. The dry shaving apparatus as claimed in claim 8, characterized in that the wall (119) is provided for securing one of the inner cutters (15, 16).
  10. The dry shaving apparatus as claimed in any one of the preceding claims, characterized in that the inner cutters (15, 16) are of an arcuate configuration.
  11. The dry shaving apparatus as claimed in any one of the preceding claims, characterized in that the resilient abutting engagement of the inner cutters (15, 16) with the outer cutter (9) is ensured by, abutment of a push rod (38) against the coupling member (11), with the push rod being arranged to be slidable against the pressure of a spring (40).
  12. The dry shaving apparatus as claimed in claim 11, characterized in that the push rod (38) and the spring (40) are arranged in the drive member (30).
  13. The dry shaving apparatus as claimed in any one of the preceding claims, characterized in that the inner cutters (15, 16) are coupled to the drive member (30) of the electric drive mechanism (12) via the coupling member (11) so as to be pivotal about a pivotal axis (Z).
  14. The dry shaving apparatus as claimed in claim 11, characterized in that the pivotal movement of the inner cutters (15, 16) about the pivotal axis (Z) is accomplished by the action of a pivotally mounted outer cutter (9) on the inner cutters (15, 16).
EP92113717A 1991-08-26 1992-08-12 Dry shaver Expired - Lifetime EP0529406B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4128220A DE4128220C1 (en) 1991-08-26 1991-08-26
DE4128220 1991-08-26

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EP0529406A1 EP0529406A1 (en) 1993-03-03
EP0529406B1 true EP0529406B1 (en) 1995-12-20

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US (1) US5245754A (en)
EP (1) EP0529406B1 (en)
JP (1) JPH05192455A (en)
AT (1) ATE131763T1 (en)
DE (2) DE4128220C1 (en)
ES (1) ES2082299T3 (en)
HK (1) HK92296A (en)

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Also Published As

Publication number Publication date
JPH05192455A (en) 1993-08-03
ES2082299T3 (en) 1996-03-16
ATE131763T1 (en) 1996-01-15
US5245754A (en) 1993-09-21
DE4128220C1 (en) 1992-08-06
EP0529406A1 (en) 1993-03-03
HK92296A (en) 1996-06-07
DE59204737D1 (en) 1996-02-01

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