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EP2043828B1 - Electric razor - Google Patents

Electric razor Download PDF

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Publication number
EP2043828B1
EP2043828B1 EP20070725347 EP07725347A EP2043828B1 EP 2043828 B1 EP2043828 B1 EP 2043828B1 EP 20070725347 EP20070725347 EP 20070725347 EP 07725347 A EP07725347 A EP 07725347A EP 2043828 B1 EP2043828 B1 EP 2043828B1
Authority
EP
European Patent Office
Prior art keywords
shaving head
shaving
housing
cutting element
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20070725347
Other languages
German (de)
French (fr)
Other versions
EP2043828A1 (en
Inventor
Bernhard Kraus
Uwe Schober
Detlef Gleich
Thomas Verstege
Tobias Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braun GmbH
Original Assignee
Braun GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Braun GmbH filed Critical Braun GmbH
Publication of EP2043828A1 publication Critical patent/EP2043828A1/en
Application granted granted Critical
Publication of EP2043828B1 publication Critical patent/EP2043828B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
    • B26B19/288—Balance by opposing oscillation
    • 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
    • B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
    • B26B19/282—Motors without a rotating central drive shaft, e.g. linear motors

Definitions

  • the invention relates to an electric shaver according to the preamble of patent claim 1.
  • Such a razor is from the DE-A 103 30 978 known.
  • an electric razor with a linear motor with two rotors.
  • the shaving head of this shaver is connected to the housing by means of leaf springs and the linear motor is suspended within the shaving head.
  • At least one runner is connected to at least one scissoring element designed as a lower blade in order to sever hair in conjunction with an associated further shear element designed as a shear foil.
  • an opposite oscillation of the lower blade and the shear foil is provided.
  • the invention is therefore an object of the invention to provide a generic shaver, which is characterized by a simple structure and optimal ergonomics, this shaver, despite all, has the advantages of a high-frequency linear motor with good efficiency.
  • a particularly great effect on the handling of the shaver has the better weight distribution according to the invention with razors with a so-called pivoting shaving head, of course, much easier to follow the skin contours at a significantly reduced shaving head weight as a shaving head, within which the complete shaver drive is arranged.
  • arranging the electric motor within the housing also facilitates the arrangement and assembly of power and control lines for operating the electric motor.
  • the shaving head can be particularly simple and cost-saving build and assemble. It is namely only a driven connection between the housing and the shaving head necessary because the shaving head itself is driven not oscillating directly by the motor in the housing, but via the elastic connection between the shearing element and the shaving head.
  • the opposite oscillation movement of the two shear elements is particularly important for an effective and thorough shaving and in the DE-C 197 36 776 described in detail, where there the opposite movement of the shear elements is realized mechanically in another way and without the use of a linear motor.
  • the electric motor itself is mounted in the housing via elastic means. As a result, remaining and not compensated in the electric motor self-compensated vibrations to the housing can be isolated.
  • a particularly vibration-compensated embodiment of the electric motor provides that both drive components are driven to oscillate relative to each other and relative to the housing.
  • the two rotor of the linear motor can oscillate in phase opposition to each other within the housing and thus can be created by appropriate balancing of the moving masses with respect to disturbing vibrations optimally compensated electric motor.
  • a further advantageous embodiment of the invention provides that the elastic connection between the at least second shear element and the shaving head is at least one leaf spring. This can be formed in particular in the manner of a known swing bridge and can be particularly simple, cost and space-saving integrated within the shaving head.
  • the first elastic element is designed as a shaving head carrier connected to the housing, at the free end of which at least a part of a rotary bearing for the shaving head is formed, by means of which the shaving head is pivotally mounted.
  • a particularly flexible cutting system is created, which automatically adapts to the contour to be shaved. It has proved to be particularly advantageous if the shaving head is pivotable about an axis extending parallel to the longitudinal axis of the shear elements axis.
  • the electric motor has a drive pin which engages in a vibrating plate mounted in the shaving head, since such a drive pin can be sealed securely with relatively little effort, which promotes the execution of a waterproof and thus washable housing.
  • both the movement of the lower blade and the opposite movement of the shaving head with the shear foil attached thereto is realized according to the invention only by a moving connection between the handpiece and the shaving head. This is achieved in that the actively driven shaving head is not accomplished directly from the motor in the handpiece, but via the elastic connection between the shaving head and the driven lower blades, wherein the shaving head carrier itself is designed as a resilient element.
  • the in Fig. 1 schematically illustrated shaver has a user-held in the housing 1, which receives the electric motor 2 and its drawing power supply not shown in the form of battery and / or power supply and the complete engine control, switch, etc.
  • the electric motor 2 is elastically mounted in the housing 1 via a motor suspension 3 in the form of a plurality of leaf springs in order to prevent the transmission of engine vibrations to the housing 1.
  • the shaving head 4 which carries at least one shearing foil 5, which constitutes a first shearing element, is connected to the housing 1 in an oscillatable manner by means of two shaving head carriers 6.
  • the blade spring-like executed Scherkopfitati 6 allow a transverse vibration of the shaving head 4 and thus the shaving foil 5 within the plane of the drawing, as indicated by the double arrow a.
  • the electric motor 2 consists of a first rotor 7 and a second rotor 8, which are coupled by means of a resonant spring 9.
  • the second rotor 8 has a U-shaped cross section, so that two iron cores are formed, around each of which a coil 10 is wound.
  • the coils 10 are connected to electronic circuits not shown in the drawing, which are arranged within the housing 1 and via which the energization of the coils 10 is controlled.
  • the first runner 7 has on its second runner and thus the coil 10 side facing one or more permanent magnets 11, the north or south poles are shown in the figure.
  • the first rotor 7 carries a drive pin 12, which engages in a swing plate 14 on which one or more lower blades 13 are attached.
  • the lower blade 13 cooperate with one or more shear sheets 5 so that each associated cutting elements can cut hair, which protrude through the holes of the shear foil 5.
  • a leaf spring 15 In order to drive the shaving head 4 itself swinging, is on the swing plate 14 left and on the right one end of a leaf spring 15 attached, the other end is hinged to the shaving head 4.
  • the coils 10 of the second rotor are supplied with power and generate a magnetic field which acts on the permanent magnets 11 of the first rotor.
  • the first rotor 7 is deflected laterally relative to the second rotor 8.
  • the two runners 7, 8 are alternately deflected in opposite directions and each loaded by the restoring forces of the resonant springs 9 back to the starting position. In this way, the runners imposed a linear oscillatory motion.
  • the antiphase oscillation movement of the rotor 7, 8 is indicated by the associated double arrows b and c.
  • the movement of the rotor 7 is transmitted via the drive pin 12 to the vibrating plate 14 and thus to the lower blade 13.
  • the shaving head 4 is excited via its connection with the vibrating plate 14 via the leaf springs 15 to vibrate. Since the excitation of the shaving head 4 is superresonant, i. the excitation frequency on the drive pin 12 is well above the resonant frequency of the oscillating system of shaving head 4 as a mass and leaf spring 15 as a spring, so that the oscillatory movement of the shaving head according to the double arrow a phase shifted to the oscillating movement of the lower blade 13, indicated by the double arrow d, takes place.
  • phase shift is among other things also dependent on the friction, which arises between the lower blade 13 and the shear foil 5, which in turn friction also depends on the contact pressure by the user.
  • the phase shift angle is 180 °, so that the shearing foil 5 runs exactly in phase opposition to the movement of the lower blade 13.
  • Fig. 2 again shows the just described kinematics with all moving masses and elasticities.
  • the elastic motor suspension is referred to, which couples the swing frame 20 to the housing 1.
  • the swing frame 20 is fixedly connected to the first rotor 7.
  • the second rotor 8 is supported by the resonance springs 9 on the swing frame 20 off. Since the drive pin 12 or the swing frame 20 has a certain elasticity, this is shown as a spring element 21.
  • the elastic shaving head carrier 6 is also drawn as a spring element which connects the housing 1 with the shaving head 4. Due to the elasticity of the swing frame 20 and the attached drive pin 12 shown by the spring element 21, this drive element acts as a relatively stiff spring, which is why, as later with reference to FIG Fig. 4 is explained, the amplitude of the lower blade 13 is greater than the oscillation amplitude of the first rotor 7th
  • Fig. 3 is shown in perspective view with broken housing 1, the upper part of a dry shaver, with the sake of clarity, the shaving foil 5, which is connected to the shaving head 4, was deliberately not shown.
  • the electric motor 2 is suspended elastically in this embodiment by means of the engine mount 3 in a motor mount 22 fixed to the housing.
  • the motor mount is designed as a box-shaped frame and has a plurality of fastening tabs 23, by means of which it can be connected to the housing 1.
  • the motor mount 22 is suitable for complete pre-assembly of the entire electric motor 2 together with the engine mount 3, swing frame 20 and drive pin 12.
  • the second runner 8 While the first runner 7 carrying the permanent magnets 11 is fixedly connected to the swing frame 20, the second runner 8 is the coil 10 carries arranged in an auxiliary frame 24 which is oscillatably coupled to the swing frame 20.
  • the second rotor 8 is connected to a coupling element 25 designed as a shaped sheet metal part, which constitutes an extension downwards and ends in the region of the resonance springs 9.
  • the two resonance springs 9 are designed as helical springs and are supported in each case with their center-facing end portion on the coupling element 25 and with its outwardly facing end on the swing frame 20 from.
  • the first rotor 7 and the second rotor 8 can be driven in opposite phase to each other in an oscillating manner with appropriate control of the coils 10.
  • the swing frame 20 carries at its upper end the drive pin 12 which is sealed out through the sealing sleeve 26 out of the housing 1.
  • the upwardly facing end of the drive pin 12 engages in the transverse groove 27 of the swing plate 14, which is guided longitudinally displaceable in the shaving head 4.
  • support bolts 28 are arranged, which connect the swing plate 14 with the lower blades 13.
  • the shaving head 4 itself is connected by means of a fork-shaped shaving head carrier 6 to the housing 1, wherein the connection between the shaving head 4 and the shaving head carrier 6 via hinges 30, which are each arranged at the free end of the two arms 31.
  • the shaving head 4 is pivotably connected to the housing about a rotation axis running parallel to the oscillation direction - see double arrow d - of the lower blade 13.
  • the arms 31 are designed like a leaf spring and thus flexible in terms of forces which are parallel to the longitudinal axis of the lower blade 13 and the direction of oscillation d.
  • the shaving head 4 and the arms 31 constitute a swingable system which is excited by the leaf spring 15 whose lower end portion 32 communicates with the swing plate 14 while its upper end portion 33 is fixed to the housing of the shaving head 4.
  • Fig. 4 represents the waveform of the individual oscillating driven elements lower blade 13, first rotor 7, shaving head 4 and second rotor 8 in a diagram.
  • the vibration is shown, which is measured on the motor carrier 22 and which corresponds to the vibration in the housing 1.
  • the oscillation of the first rotor 7 runs in opposite phase to that of the second rotor 8, the amplitude of the second rotor 8 carrying the coils 10 being slightly larger than the amplitude of the first rotor 7 carrying the magnet arrangement.
  • the amplitude of the shaving head 4 is due to the design of the leaf spring 15 about 10% of the lower blade or vibration plate amplitude and runs in opposite directions to the Oscillation of the vibrating plate 14, since the excitation frequency through the vibrating plate 14 above the resonant frequency of the vibrating system of the mass of the shaving head 4 and acting as a spring leaf spring 15 is located.

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

Description

Die Erfindung betrifft einen elektrischen Rasierapparat nach dem Oberbegriff des Patentanspruchs 1.The invention relates to an electric shaver according to the preamble of patent claim 1.

Ein derartiger Rasierapparat ist aus der DE-A 103 30 978 bekannt. Dort ist ein elektrischer Rasierapparat mit einem Linearmotor mit zwei Läufern offenbart. Der Scherkopf dieses Rasierers ist durch Blattfedern schwingfähig mit dem Gehäuse verbunden und der Linearmotor ist innerhalb des Scherkopfes aufgehängt. Mindestens ein Läufer ist mit mindestens einem als Untermesser ausgebildeten Scherefement verbunden, um in Verbindung mit einem zugeordneten, als Scherfolie ausgebildeten, weiteren Scherelement Haare zu durchtrennen. Des weiteren ist eine gegenläufige Oszillation von Untermesser und Scherfolie vorgesehen. Dadurch, daß der gesamte Elektromotor mit seinen beiden Läufern im Scherkopf angeordnet ist, müssen zum einen sämtliche Energie- und Steuerleitungen in dieses schwingende Bauteil hineingeführt werden, darüber hinaus hat sich gezeigt, daß ein derartiger Rasierapparat ausgesprochen kopflastig wird. Dies wirkt sich nachteilig auf Ergonomie und Benutzerkomfort aus.Such a razor is from the DE-A 103 30 978 known. There is disclosed an electric razor with a linear motor with two rotors. The shaving head of this shaver is connected to the housing by means of leaf springs and the linear motor is suspended within the shaving head. At least one runner is connected to at least one scissoring element designed as a lower blade in order to sever hair in conjunction with an associated further shear element designed as a shear foil. Furthermore, an opposite oscillation of the lower blade and the shear foil is provided. The fact that the entire electric motor is arranged with its two runners in the shaving head, on the one hand all energy and control lines must be guided into this vibrating component, moreover, it has been shown that such a razor is very top-heavy. This has a detrimental effect on ergonomics and user comfort.

Der Erfindung liegt daher die Aufgabe zugrunde, einen gattungsgemäßen Rasierapparat zu schaffen, welcher sich durch einen einfachen Aufbau und eine optimale Ergonomie auszeichnet, wobei dieser Rasierapparat trotz allem die Vorteile eines hochfrequent betreibbaren Linearmotors mit gutem Wirkungsgrad aufweist.The invention is therefore an object of the invention to provide a generic shaver, which is characterized by a simple structure and optimal ergonomics, this shaver, despite all, has the advantages of a high-frequency linear motor with good efficiency.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.

Gemäß der Erfindung ist der Elektromotor mit seinen beiden Antriebskomponenten im Gehäuse und nicht, wie im obengenannten Stand der Technik, innerhalb des Scherkopfes angeordnet, wodurch dieser natürlich deutlich leichter ist und die Gewichtsverteilung des gesamten Rasierapparates sehr ausgewogen ist. Eine ganz besonders große Auswirkung auf die Handhabung des Rasierapparates hat die gemäß der Erfindung bessere Gewichtsverteilung bei Rasierapparaten mit einem sogenannten schwenkbaren Scherkopf, der bei deutlich reduziertem Scherkopfgewicht natürlich viel leichter den Hautkonturen folgen kann als ein Scherkopf, innerhalb dem der komplette Rasiererantrieb angeordnet ist. Das Anordnen des Elektromotors innerhalb des Gehäuses erleichtert natürlich außerdem noch die Anordnung und Montage von Energie- und Steuerleitungen zum Betrieb des Elektromotors. Dadurch, daß die elastische Verbindung vom zweiten Scherelement bzw. von einem mit diesem verbundenen Antriebsteil zum Scherkopf innerhalb des Scherkopfes angeordnet ist, läßt sich der Scherkopf besonders einfach und kostensparend aufbauen und montieren. Es Ist nämlich nur eine angetriebene Verbindung zwischen dem Gehäuse und dem Scherkopf nötig, da der Scherkopf selbst nicht direkt vom Motor im Gehäuse, sondern über die elastische Verbindung zwischen dem Scherelement und dem Scherkopf oszillierend angetrieben wird. Die gegenläufige Oszillationsbewegung der beiden Scherelemente (Scherfolie und Untermesser) ist für eine effektive und gründliche Rasur besonders wichtig und in der DE-C 197 36 776 ausführlich beschrieben, wobei dort die gegenläufige Bewegung der Scherelemente mechanisch auf andere Weise und ohne die Verwendung eines Linearmotores realisiert ist. Der Elektromotor selbst ist über elastische Mittel im Gehäuse gelagert. Dadurch lassen sich verbleibende und nicht im Elektromotor selbst kompensierte Vibrationen gegenüber dem Gehäuse isolieren.According to the invention, the electric motor with its two drive components in the housing and not, as in the above-mentioned prior art, disposed within the shaving head, which of course is much lighter and the weight distribution of the entire shaver is very balanced. A particularly great effect on the handling of the shaver has the better weight distribution according to the invention with razors with a so-called pivoting shaving head, of course, much easier to follow the skin contours at a significantly reduced shaving head weight as a shaving head, within which the complete shaver drive is arranged. Of course, arranging the electric motor within the housing also facilitates the arrangement and assembly of power and control lines for operating the electric motor. Thereby, that the elastic connection is arranged by the second shear element or by a connected to this drive part to the shaving head within the shaving head, the shaving head can be particularly simple and cost-saving build and assemble. It is namely only a driven connection between the housing and the shaving head necessary because the shaving head itself is driven not oscillating directly by the motor in the housing, but via the elastic connection between the shearing element and the shaving head. The opposite oscillation movement of the two shear elements (shaving foil and lower blade) is particularly important for an effective and thorough shaving and in the DE-C 197 36 776 described in detail, where there the opposite movement of the shear elements is realized mechanically in another way and without the use of a linear motor. The electric motor itself is mounted in the housing via elastic means. As a result, remaining and not compensated in the electric motor self-compensated vibrations to the housing can be isolated.

Eine besonders schwingungskompensierte Ausführung des Elektromotors sieht vor, daß beide Antriebskomponenten relativ zueinander und relativ zu dem Gehäuse oszillierend angetrieben sind. Dadurch können die beiden Läufer des Linearmotors gegenphasig zueinander innerhalb des Gehäuses oszillieren und damit kann durch entsprechendes Austarieren der bewegten Massen ein in Bezug auf störende Schwingungen optimal kompensierter Elektromotor geschaffen werden.A particularly vibration-compensated embodiment of the electric motor provides that both drive components are driven to oscillate relative to each other and relative to the housing. As a result, the two rotor of the linear motor can oscillate in phase opposition to each other within the housing and thus can be created by appropriate balancing of the moving masses with respect to disturbing vibrations optimally compensated electric motor.

Eine weitere vorteilhafte Ausführung der Erfindung sieht vor, daß die elastische Verbindung zwischen dem wenigstens zweiten Scherelement und dem Scherkopf mindestens eine Blattfeder ist. Diese kann insbesondere nach Art einer an sich bekannten Schwingbrücke ausgebildet werden und läßt sich besonders einfach, kosten- und raumsparend innerhalb des Scherkopfes integrieren.A further advantageous embodiment of the invention provides that the elastic connection between the at least second shear element and the shaving head is at least one leaf spring. This can be formed in particular in the manner of a known swing bridge and can be particularly simple, cost and space-saving integrated within the shaving head.

Vorteilhafterweise ist das erste elastische Element als ein mit dem Gehäuse verbundener Scherkopfträger ausgebildet, an dessen freiem Ende zumindest ein Teil eines Drehlagers für den Scherkopf ausgebildet ist, mittels dessen der Scherkopf schwenkbar gelagert ist. Durch diese Verschwenkbarkeit wird ein besonders flexibles Schersystem geschaffen, welches sich automatisch an die zu rasierende Kontur anpaßt. Dabei hat es sich als besonders vorteilhaft erwiesen, wenn der Scherkopf um eine parallel zur Längsachse der Scherelemente verlaufende Achse schwenkbar ist.Advantageously, the first elastic element is designed as a shaving head carrier connected to the housing, at the free end of which at least a part of a rotary bearing for the shaving head is formed, by means of which the shaving head is pivotally mounted. By this pivoting a particularly flexible cutting system is created, which automatically adapts to the contour to be shaved. It has proved to be particularly advantageous if the shaving head is pivotable about an axis extending parallel to the longitudinal axis of the shear elements axis.

Sowohl für die Ausführung mit schwenkbarem Scherkopf, als auch für die Ausführung mit starrem Scherkopf ist es von Vorteil, wenn der Elektromotor einen Antriebsstift aufweist, der in eine im Scherkopf gelagerte Schwingplatte eingreift, da sich ein solcher Antriebsstift mit relativ wenig Aufwand sicher abdichten läßt, was die Ausführung eines wasserdichten und damit waschbaren Gehäuses fördert.Both for the embodiment with a pivotable shaving head, as well as for the design with a rigid shaving head, it is advantageous if the electric motor has a drive pin which engages in a vibrating plate mounted in the shaving head, since such a drive pin can be sealed securely with relatively little effort, which promotes the execution of a waterproof and thus washable housing.

Wird das durch den Scherkopf selbst und seine elastische Anlenkung an das Gehäuse gebildete Schwingsystem oberhalb seiner Resonanzfrequenz, also überresonant, durch das zweite Scherelement angeregt, so ist stets sichergestellt, daß sich der Scherkopf und damit die an ihm befestigten Scherfolien gegenphasig zu den angetriebenen Untermessern bewegen, so daß hierzu keine besonderen weiteren Mittel angewandt werden müssen. Sowohl die Bewegung der Untermesser als auch die gegenläufige Bewegung des Scherkopfes mit den daran befestigten Scherfolien wird gemäß der Erfindung nur durch eine bewegte Verbindung zwischen dem Handstück und dem Scherkopf realisiert. Dies wird dadurch erreicht, daß der aktiv angetriebene Scherkopf nicht direkt vom Motor im Handstück, sondern über die elastische Verbindung zwischen dem Scherkopf und den angetriebenen Untermessern bewerkstelligt ist, wobei der Scherkopfträger selbst als federndes Element ausgebildet ist. Durch die Verwendung eines Linearmotors als Antrieb sind sehr hohe Betriebsfrequenzen im Vergleich zur Verwendung von Gleichstrommotoren möglich, trotzdem werden in der Antriebsmechanik der Scherteile Reibung und Geräusch vermieden, da keinerlei Getriebe, Hebel oder andere Übertragungsglieder eingesetzt sind, sondern sämtliche Antriebsverbindungen über Federn, insbesondere über Blattfedern, realisiert sind.If the oscillating system formed by the shaving head itself and its elastic articulation to the housing above its resonant frequency, so überresonant excited by the second shear element, it is always ensured that the shaving head and thus attached to him shear slides move in opposite directions to the driven lower blades so there is no need for special additional resources. Both the movement of the lower blade and the opposite movement of the shaving head with the shear foil attached thereto is realized according to the invention only by a moving connection between the handpiece and the shaving head. This is achieved in that the actively driven shaving head is not accomplished directly from the motor in the handpiece, but via the elastic connection between the shaving head and the driven lower blades, wherein the shaving head carrier itself is designed as a resilient element. By using a linear motor as a drive very high operating frequencies in comparison to the use of DC motors are possible, nevertheless friction and noise are avoided in the drive mechanism of the shear parts, since no gear, lever or other transmission elements are used, but all drive connections via springs, in particular Leaf springs, are realized.

Weitere Ziele, Merkmale, Vorteile und Anwendungsmöglichkeiten der vorliegenden Erfindung ergeben sich aus der nachstehenden Beschreibung der Ausführungsbeispiele. Dabei bilden alle beschriebenen oder bildlich dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand vorliegender Erfindung, auch unabhängig von ihrer Zusammenfassung in den Ansprüchen oder deren Rückbeziehung.Other objects, features, advantages and applications of the present invention will become apparent from the following description of the embodiments. All described or illustrated features alone or in any combination form the subject matter of the present invention, also regardless of their summary in the claims or their dependency.

Hierzu zeigt:

Fig. 1
die schematische Darstellung eines erfindungsgemäßen Trockenrasierapparates,
Fig. 2
ein mechanisches Ersatzmodell für die Kinematik nach Fig. 1,
Fig. 3
eine perspektivische Darstellung eines erfindungemäßen elektrischen Rasierapparates und
Fig. 4
den Schwingungsverlauf einzelner Rasiererkomponenten des erfindungsgemäßen Rasierapparates.
This shows:
Fig. 1
the schematic representation of a dry shaver invention,
Fig. 2
a mechanical replacement model for the kinematics after Fig. 1 .
Fig. 3
a perspective view of a erfindungemäßen electric shaver and
Fig. 4
the waveform of individual razor components of the razor according to the invention.

Der in Fig. 1 schematisch dargestellte Rasierapparat besitzt ein vom Benutzer in der Hand gehaltenes Gehäuse 1, das den Elektromotor 2 sowie dessen zeichnerisch nicht dargestellte Energieversorgung in Form von Akku und/oder Netzteil sowie die komplette Motorsteuerung, Schalter usw. aufnimmt. Der Elektromotor 2 ist über eine in Form von mehreren Blattfedern ausgeführte Motoraufhängung 3 im Gehäuse 1 elastisch gelagert, um die Übertragung von Motorvibrationen auf das Gehäuse 1 zu vermeiden.The in Fig. 1 schematically illustrated shaver has a user-held in the housing 1, which receives the electric motor 2 and its drawing power supply not shown in the form of battery and / or power supply and the complete engine control, switch, etc. The electric motor 2 is elastically mounted in the housing 1 via a motor suspension 3 in the form of a plurality of leaf springs in order to prevent the transmission of engine vibrations to the housing 1.

Der Scherkopf 4, welcher mindestens eine Scherfolie 5 trägt, die ein erstes Scherelement darstellt, ist mittels zweier Scherkopfträger 6 schwingfähig mit dem Gehäuse 1 verbunden. Die blattfederartig ausgeführten Scherkopfträger 6 erlauben eine Querschwingung des Scherkopfes 4 und damit der Scherfolie 5 innerhalb der Zeichenebene, wie sie durch den Doppelpfeil a angezeigt ist.The shaving head 4, which carries at least one shearing foil 5, which constitutes a first shearing element, is connected to the housing 1 in an oscillatable manner by means of two shaving head carriers 6. The blade spring-like executed Scherkopfträger 6 allow a transverse vibration of the shaving head 4 and thus the shaving foil 5 within the plane of the drawing, as indicated by the double arrow a.

Der Elektromotor 2 besteht aus einem ersten Läufer 7 und einem zweiten Läufer 8, die mittels einer Resonanzfeder 9 gekoppelt sind. Der zweite Läufer 8 besitzt einen U-förmigen Querschnitt, so daß zwei Eisenkerne gebildet werden, um welche jeweils eine Spule 10 gewickelt ist. Die Spulen 10 sind an zeichnerisch nicht dargestellte elektronische Schaltungen angeschlossen, die innerhalb des Gehäuses 1 angeordnet sind und über welche die Bestromung der Spulen 10 gesteuert wird.The electric motor 2 consists of a first rotor 7 and a second rotor 8, which are coupled by means of a resonant spring 9. The second rotor 8 has a U-shaped cross section, so that two iron cores are formed, around each of which a coil 10 is wound. The coils 10 are connected to electronic circuits not shown in the drawing, which are arranged within the housing 1 and via which the energization of the coils 10 is controlled.

Der erste Läufer 7 weist auf seiner dem zweiten Läufer und damit den Spulen 10 zugewandten Seite ein oder mehrere Permanentmagneten 11 auf, deren Nord- bzw. Südpole in der Figur eingezeichnet sind.The first runner 7 has on its second runner and thus the coil 10 side facing one or more permanent magnets 11, the north or south poles are shown in the figure.

Der erste Läufer 7 trägt einen Antriebsstift 12, der in eine Schwingplatte 14 eingreift, auf welcher ein oder mehrere Untermesser 13 befestigt sind. Die Untermesser 13 arbeiten mit ein oder mehreren Scherfolien 5 zusammen, so daß jeweils zugeordnete Schneidelemente Haare schneiden können, welche durch die Löcher der Scherfolien 5 hindurchragen. Um den Scherkopf 4 selbst auch schwingend antreiben zu können, ist an der Schwingplatte 14 links und rechts jeweils ein Ende einer Blattfeder 15 befestigt, deren anderes Ende am Scherkopf 4 angelenkt ist.The first rotor 7 carries a drive pin 12, which engages in a swing plate 14 on which one or more lower blades 13 are attached. The lower blade 13 cooperate with one or more shear sheets 5 so that each associated cutting elements can cut hair, which protrude through the holes of the shear foil 5. In order to drive the shaving head 4 itself swinging, is on the swing plate 14 left and on the right one end of a leaf spring 15 attached, the other end is hinged to the shaving head 4.

Im Betriebszustand des Rasierapparates werden die Spulen 10 des zweiten Läufers mit Strom versorgt und erzeugen ein Magnetfeld, das auf die Permanentmagnete 11 des ersten Läufers einwirkt. Dadurch wird der erste Läufer 7 relativ zum zweiten Läufer 8 seitlich ausgelenkt. Mittels einer an sich bekannten periodischen Ansteuerung der Spulen 10 werden die beiden Läufer 7, 8 abwechselnd in einander entgegengesetzte Richtungen ausgelenkt und jeweils durch die Rückstellkräfte der Resonanzfedern 9 wieder in die Ausgangsstellung zurückbelastet. Auf diese Weise wird den Läufern eine lineare Schwingungsbewegung aufgezwungen. Die gegenphasige Oszillationsbewegung der Läufer 7, 8 ist durch die zugeordneten Doppelpfeile b bzw. c angedeutet. Dadurch, daß sich beide Läufer gegenphasig zueinander bewegen und keiner der Läufer 7, 8 fest mit dem Gehäuse 1 verbunden ist, werden die aus den bewegten Massen resultierenden Schwingungen automatisch kompensiert. Dies gilt insbesondere dann, wenn sich die Massenschwerpunkte der beteiligten Läufer 7, 8 und den mit ihnen fest verbundenen und mitbewegten Bauteile auf einer gemeinsamen Gerade bewegen.In the operating state of the shaver, the coils 10 of the second rotor are supplied with power and generate a magnetic field which acts on the permanent magnets 11 of the first rotor. As a result, the first rotor 7 is deflected laterally relative to the second rotor 8. By means of a per se known periodic control of the coils 10, the two runners 7, 8 are alternately deflected in opposite directions and each loaded by the restoring forces of the resonant springs 9 back to the starting position. In this way, the runners imposed a linear oscillatory motion. The antiphase oscillation movement of the rotor 7, 8 is indicated by the associated double arrows b and c. The fact that both runners move in opposite phase to each other and none of the rotor 7, 8 is fixedly connected to the housing 1, the vibrations resulting from the moving masses are automatically compensated. This applies in particular when the centers of mass of the runners 7, 8 involved and the components that are firmly connected and moved with them move on a common straight line.

Die Bewegung des Läufers 7 wird über den Antriebsstift 12 auf die Schwingplatte 14 und damit auf das Untermesser 13 übertragen. Gleichzeitig wird der Scherkopf 4 über seine Verbindung mit der Schwingplatte 14 über die Blattfedern 15 zum Schwingen angeregt. Da die Anregung des Scherkopfes 4 überresonant ist, d.h. die Anregungsfrequenz über den Antriebsstift 12 liegt deutlich oberhalb der Resonanzfrequenz des Schwingsystems aus Scherkopf 4 als Masse und Blattfeder 15 als Feder, so daß die Oszillationsbewegung des Scherkopfes entsprechend dem Doppelpfeil a phasenverschoben zur Oszillationsbewegung des Untermessers 13, angedeutet durch den Doppelpfeil d, erfolgt. Die sich während des Betriebes tatsächlich einstellende Phasenverschiebung ist unter anderem auch von der Reibung abhängig, welche zwischen dem Untermesser 13 und der Scherfolie 5 entsteht, welche Reibung wiederum auch vom Anpreßdruck durch den Benutzer abhängt. Im Idealfall beträgt der Phasenverschiebungswinkel 180°, so daß die Scherfolie 5 exakt gegenphasig zur Bewegung des Untermessers 13 verläuft.The movement of the rotor 7 is transmitted via the drive pin 12 to the vibrating plate 14 and thus to the lower blade 13. At the same time the shaving head 4 is excited via its connection with the vibrating plate 14 via the leaf springs 15 to vibrate. Since the excitation of the shaving head 4 is superresonant, i. the excitation frequency on the drive pin 12 is well above the resonant frequency of the oscillating system of shaving head 4 as a mass and leaf spring 15 as a spring, so that the oscillatory movement of the shaving head according to the double arrow a phase shifted to the oscillating movement of the lower blade 13, indicated by the double arrow d, takes place. The actually occurring during operation phase shift is among other things also dependent on the friction, which arises between the lower blade 13 and the shear foil 5, which in turn friction also depends on the contact pressure by the user. Ideally, the phase shift angle is 180 °, so that the shearing foil 5 runs exactly in phase opposition to the movement of the lower blade 13.

Fig. 2 zeigt nochmals die gerade beschriebene Kinematik mit sämtlichen bewegten Massen und Elastizitäten. Mit 3 ist die elastische Motoraufhängung bezeichnet, die den Schwingrahmen 20 mit dem Gehäuse 1 koppelt. Der Schwingrahmen 20 ist fest mit dem ersten Läufer 7 verbunden. Der zweite Läufer 8 stützt sich über die Resonanzfedern 9 am Schwingrahmen 20 ab. Da der Antriebsstift 12 bzw. auch der Schwingrahmen 20 eine gewisse Elastizität aufweist, ist diese als Federelement 21 eingezeichnet. Der elastische Scherkopfträger 6 ist ebenso als Federelement, das das Gehäuse 1 mit dem Scherkopf 4 verbindet, gezeichnet. Die Blattfeder 15 verbindet den das Untermesser 13 tragenden Antriebsstift mit dem Scherkopf 4. Aufgrund der durch das Federelement 21 dargestellten Elastizität des Schwingrahmens 20 bzw. des daran befestigten Antriebsstiftes 12 wirkt dieses Antriebselement als relativ steife Feder, weswegen, wie später noch anhand der Fig. 4 erklärt wird, die Amplitude des Untermessers 13 größer ist als die Schwingungsamplitude des ersten Läufers 7. Fig. 2 again shows the just described kinematics with all moving masses and elasticities. With 3, the elastic motor suspension is referred to, which couples the swing frame 20 to the housing 1. The swing frame 20 is fixedly connected to the first rotor 7. The second rotor 8 is supported by the resonance springs 9 on the swing frame 20 off. Since the drive pin 12 or the swing frame 20 has a certain elasticity, this is shown as a spring element 21. The elastic shaving head carrier 6 is also drawn as a spring element which connects the housing 1 with the shaving head 4. Due to the elasticity of the swing frame 20 and the attached drive pin 12 shown by the spring element 21, this drive element acts as a relatively stiff spring, which is why, as later with reference to FIG Fig. 4 is explained, the amplitude of the lower blade 13 is greater than the oscillation amplitude of the first rotor 7th

In Fig. 3 ist in perspektivischer Darstellung mit aufgebrochenem Gehäuse 1 der obere Teil eines Trockenrasierers dargestellt, wobei der Übersichtlichkeit wegen die Scherfolie 5, die mit dem Scherkopf 4 verbunden ist, bewußt nicht dargestellt wurde. Der Elektromotor 2 ist in diesem Ausführungsbeispiel mittels der Motoraufhängung 3 elastisch in einem gehäusefesten Motorträger 22 aufgehängt. Der Motorträger ist als kastenförmiger Rahmen ausgebildet und weist mehrere Befestigungslaschen 23 auf, mittels derer er mit dem Gehäuse 1 verbindbar ist. Der Motorträger 22 eignet sich für eine komplette Vormontage des gesamten Elektromotors 2 samt Motoraufhängung 3, Schwingrahmen 20 sowie Antriebsstift 12. Während der die Permanentmagnete 11 tragende erste Läufer 7 fest mit dem Schwingrahmen 20 verbunden ist, ist der zweite Läufer 8, welcher die Spulen 10 trägt, in einem Hilfsrahmen 24 angeordnet, welcher schwingfähig mit dem Schwingrahmen 20 gekoppelt ist. Der zweite Läufer 8 ist mit einem als Blechformteil ausgeführten Koppelelement 25 verbunden, das eine Verlängerung nach unten darstellt und im Bereich der Resonanzfedern 9 endet. Die beiden Resonanzfedern 9 sind als Schraubenfedern ausgebildet und stützen sich jeweils mit ihrem zur Mitte weisenden Endabschnitt am Koppelelement 25 und mit ihrem nach außen weisenden Ende am Schwingrahmen 20 ab. Dadurch können der erste Läufer 7 und der zweite Läufer 8 gegenphasig zueinander oszillierend bei entsprechender Ansteuerung der Spulen 10 angetrieben werden. Parallel zur Motoraufhängung 3 verlaufende Blattfedern geringer Biegesteifigkeit dienen der Parallelführung des Hilfsrahmens 24 relativ zum Schwingrahmen 20. Der Schwingrahmen 20 trägt an seinem oberen Ende den Antriebsstift 12, der abgedichtet durch die Dichtungsmanschette 26 aus dem Gehäuse 1 herausgeführt ist. Das nach oben weisende Ende des Antriebsstiftes 12 greift in die querverlaufende Nut 27 der Schwingplatte 14 ein, welche längsverschiebbar im Scherkopf 4 geführt ist. Auf der Schwingplatte 14 sind Tragbolzen 28 angeordnet, welche die Schwingplatte 14 mit den Untermessern 13 verbinden. Mittels der Druckfedern 29, welche die Tragbolzen 28 umgeben, sind die jeweils aus einem Untermesser 13 und einer zugeordneten Scherfolie 5 bestehenden Schersysteme abtauchbar im Scherkopf 4 gelagert.In Fig. 3 is shown in perspective view with broken housing 1, the upper part of a dry shaver, with the sake of clarity, the shaving foil 5, which is connected to the shaving head 4, was deliberately not shown. The electric motor 2 is suspended elastically in this embodiment by means of the engine mount 3 in a motor mount 22 fixed to the housing. The motor mount is designed as a box-shaped frame and has a plurality of fastening tabs 23, by means of which it can be connected to the housing 1. The motor mount 22 is suitable for complete pre-assembly of the entire electric motor 2 together with the engine mount 3, swing frame 20 and drive pin 12. While the first runner 7 carrying the permanent magnets 11 is fixedly connected to the swing frame 20, the second runner 8 is the coil 10 carries arranged in an auxiliary frame 24 which is oscillatably coupled to the swing frame 20. The second rotor 8 is connected to a coupling element 25 designed as a shaped sheet metal part, which constitutes an extension downwards and ends in the region of the resonance springs 9. The two resonance springs 9 are designed as helical springs and are supported in each case with their center-facing end portion on the coupling element 25 and with its outwardly facing end on the swing frame 20 from. As a result, the first rotor 7 and the second rotor 8 can be driven in opposite phase to each other in an oscillating manner with appropriate control of the coils 10. Parallel to the engine mount 3 extending leaf springs low bending stiffness serve the parallel guidance of the subframe 24 relative to the swing frame 20. The swing frame 20 carries at its upper end the drive pin 12 which is sealed out through the sealing sleeve 26 out of the housing 1. The upwardly facing end of the drive pin 12 engages in the transverse groove 27 of the swing plate 14, which is guided longitudinally displaceable in the shaving head 4. On the swing plate 14 support bolts 28 are arranged, which connect the swing plate 14 with the lower blades 13. By means of the compression springs 29, which surround the support bolts 28, each of a lower blade 13 and an associated shear foil 5 existing shear systems are abtauchbar stored in the shaving head 4.

Der Scherkopf 4 selbst ist mittels eines gabelförmigen Scherkopfträgers 6 mit dem Gehäuse 1 verbunden, wobei die Verbindung zwischen dem Scherkopf 4 und dem Scherkopfträger 6 über Drehgelenke 30 erfolgt, die jeweils am freien Ende der beiden Arme 31 angeordnet sind. Dadurch ist der Scherkopf 4 um eine parallel zur Oszillationsrichtung - siehe Doppelpfeil d - der Untermesser 13 verlaufende Drehachse schwenkbar mit dem Gehäuse verbunden. Die Arme 31 sind blattfederartig ausgeführt und damit biegeweich in Bezug auf Kräfte, die parallel zur Längsachse der Untermesser 13 bzw. deren Oszillationsrichtung d verlaufen. Dadurch stellen der Scherkopf 4 und die Arme 31 ein schwingfähiges System dar, welches über die Blattfeder 15 angeregt wird, deren unterer Endabschnitt 32 mit der Schwingplatte 14 in Verbindung steht, während ihr oberer Endabschnitt 33 am Gehäuse des Scherkopfes 4 befestigt ist.The shaving head 4 itself is connected by means of a fork-shaped shaving head carrier 6 to the housing 1, wherein the connection between the shaving head 4 and the shaving head carrier 6 via hinges 30, which are each arranged at the free end of the two arms 31. As a result, the shaving head 4 is pivotably connected to the housing about a rotation axis running parallel to the oscillation direction - see double arrow d - of the lower blade 13. The arms 31 are designed like a leaf spring and thus flexible in terms of forces which are parallel to the longitudinal axis of the lower blade 13 and the direction of oscillation d. Thereby, the shaving head 4 and the arms 31 constitute a swingable system which is excited by the leaf spring 15 whose lower end portion 32 communicates with the swing plate 14 while its upper end portion 33 is fixed to the housing of the shaving head 4.

Fig. 4 stellt den Schwingungsverlauf der einzelnen oszillierend angetriebenen Elemente Untermesser 13, erster Läufer 7, Scherkopf 4 und zweiter Läufer 8 in einem Diagramm dar. Darüber hinaus ist auch die Schwingung dargestellt, welche am Motorträger 22 meßbar ist und die der Vibration im Gehäuse 1 entspricht. Wie klar zu erkennen, verläuft die Schwingung des ersten Läufers 7 gegenphasig zu der des zweiten Läufers 8, wobei die Amplitude des zweiten, die Spulen 10 tragenden Läufers 8 etwas größer ist als die Amplitude des die Magnetanordnung tragenden ersten Läufers 7. Aufgrund einer gewissen Elastizität des Schwingrahmens 20 und des Antriebsstifts 12 ist die Amplitude des Untermessers 13 etwas größer als die des mit ihm verbundenen ersten Läufers 7. Die Amplitude des Scherkopfes 4 beträgt aufgrund der Auslegung der Blattfeder 15 etwa 10 % der Untermesser- bzw. Schwingplattenamplitude und verläuft gegenphasig zur Schwingung der Schwingplatte 14, da die Anregungsfrequenz durch die Schwingplatte 14 oberhalb der Resonanzfrequenz des Schwingsystems aus der Masse des Scherkopfes 4 und der als Feder wirkenden Blattfeder 15 liegt. Fig. 4 represents the waveform of the individual oscillating driven elements lower blade 13, first rotor 7, shaving head 4 and second rotor 8 in a diagram. In addition, the vibration is shown, which is measured on the motor carrier 22 and which corresponds to the vibration in the housing 1. As can be clearly seen, the oscillation of the first rotor 7 runs in opposite phase to that of the second rotor 8, the amplitude of the second rotor 8 carrying the coils 10 being slightly larger than the amplitude of the first rotor 7 carrying the magnet arrangement. Due to a certain elasticity The amplitude of the shaving head 4 is due to the design of the leaf spring 15 about 10% of the lower blade or vibration plate amplitude and runs in opposite directions to the Oscillation of the vibrating plate 14, since the excitation frequency through the vibrating plate 14 above the resonant frequency of the vibrating system of the mass of the shaving head 4 and acting as a spring leaf spring 15 is located.

Aufgrund der Gegenphasigkeit der Bewegungsabläufe der unterschiedlichen Massen ist die auf das Gehäuse 1 bzw. auf den Motorträger 22 übertragene Vibration nahezu Null, wie aus dem Verlauf dieser Schwingungskurve hervorgeht.Due to the antiphase nature of the movement sequences of the different masses, the vibration transmitted to the housing 1 or to the motor mount 22 is virtually zero, as can be seen from the course of this oscillation curve.

Claims (8)

  1. An electric shaving apparatus with a housing (1); a shaving head (4) that is coupled with the housing (1) via at least one first elastic element (6, 31) and has at least one first cutting element (5) and at least one second cutting element (13); an electric motor (2) for producing an oscillation motion of the shaving head (4) and an oscillation motion oft he at least one second cutting element (13) that deviates from the oscillation motion of the shaving head (4);wherein the electric motor (2) has two drive components (7, 8), and a first drive component (7) may be driven in oscillation relative to a second drive component (8); and wherein one of the drive components (7) is connected with the at least one second cutting element (13); wherein at least one second cutting element (13) has an elastic connection to the shaving head (4) via a drive part (12, 14) connected with the at least one second cutting element (13),
    characterized in that
    the electric motor (2) is disposed in the housing (1) and is mounted in the housing (1) via elastic means (3).
  2. The shaving apparatus according to claim 1,
    characterized in that
    the elastic means (3) are leaf springs.
  3. The shaving apparatus according to any one of the preceding claims,
    characterized in that
    the elastic connection between the drive part connected with the at least one second cutting element (13) and the shaving head (4) is at least one leaf spring (15).
  4. The shaving apparatus according to any one of the preceding claims,
    characterized in that
    the first elastic element (6) is a shaving head support connected with the housing (1), which shaving head support has at its free end at least one part of a pivot bearing (30) for the shaving head (4) by means of which the shaving head (4) is pivotably mounted.
  5. The shaving apparatus according to claim 4,
    characterized in that
    the shaving head (4) is pivotable on an axis running parallel to the longitudinal axis of the cutting elements.
  6. The shaving apparatus according to any one of the preceding claims,
    characterized in that
    the electric motor (2) has a drive pin (12) that engages an oscillating plate (14) mounted in the shaving head (4).
  7. The shaving apparatus according to any one of the preceding claims,
    characterized in that
    the oscillation excitation of the shaving head (4) is overresonant.
  8. The shaving apparatus according to any one of the preceding claims,
    characterized in that
    both drive components (7, 8) may be driven in oscillation relative to one another and relative to the housing (1).
EP20070725347 2006-07-20 2007-05-18 Electric razor Active EP2043828B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610034050 DE102006034050A1 (en) 2006-07-20 2006-07-20 Electric shaver
PCT/EP2007/004439 WO2008009322A1 (en) 2006-07-20 2007-05-18 Electric razor

Publications (2)

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EP2043828A1 EP2043828A1 (en) 2009-04-08
EP2043828B1 true EP2043828B1 (en) 2013-04-03

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US (1) US8806756B2 (en)
EP (1) EP2043828B1 (en)
JP (1) JP5179489B2 (en)
CN (1) CN101489738B (en)
DE (1) DE102006034050A1 (en)
RU (1) RU2438860C2 (en)
WO (1) WO2008009322A1 (en)

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US8806756B2 (en) 2014-08-19
CN101489738A (en) 2009-07-22
WO2008009322A1 (en) 2008-01-24
JP2009543620A (en) 2009-12-10
JP5179489B2 (en) 2013-04-10
RU2438860C2 (en) 2012-01-10
US20090165305A1 (en) 2009-07-02
DE102006034050A1 (en) 2008-01-24
RU2009105887A (en) 2010-08-27
CN101489738B (en) 2013-10-16
EP2043828A1 (en) 2009-04-08

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