EP2043828B1 - Rasoir électrique - Google Patents

Rasoir électrique 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)
English (en)
Other versions
EP2043828A1 (fr
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/fr
Application granted granted Critical
Publication of EP2043828B1 publication Critical patent/EP2043828B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/28—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)

Claims (8)

  1. Rasoir électrique comprenant un boîtier (1), une tête de rasage (4), qui est accouplée au boîtier (1) par le biais d'au moins un premier élément élastique (6, 31) et qui présente au moins un premier élément de rasage (5) et au moins un second élément de rasage (13), un moteur électrique (2) permettant de générer un mouvement d'oscillation de la tête de rasage (4) et un mouvement d'oscillation divergent du au moins un second élément de rasage (13), le moteur électrique (2) présentant deux composants d'entraînement (7, 8) et un premier composant d'entraînement (7) pouvant être entraîné de façon oscillante par rapport à un second composant d'entraînement (8), et l'un des composants d'entraînement (7) étant relié au au moins second élément de rasage (13), au moins un second élément de rasage (13) possédant une liaison élastique avec la tête de rasage (4) par le biais d'une pièce d'entraînement (12, 14) reliée à cet élément de rasage,
    caractérisé en ce que ,
    le moteur électrique (2) est disposé dans le boîtier (1) et est logé dans le boîtier (1) par le biais de moyens élastiques (3).
  2. Rasoir selon la revendication 1,
    caractérisé en ce que,
    les moyens élastiques (3) sont des ressorts à lames.
  3. Rasoir selon l'une des revendications précédentes,
    caractérisé en ce que ,
    la liaison élastique entre la pièce d'entraînement reliée au au moins un second élément de rasage (13) et la tête de rasage (4) est au moins un ressort à lames (15).
  4. Rasoir selon l'une des revendications précédentes,
    caractérisé en ce que ,
    le premier élément élastique (6) est un support de tête de rasage relié au boîtier (1) et qui présente au moins une partie d'un palier rotatif (30) pour la tête de rasage (4) à son extrémité libre, palier grâce auquel la tête de rasage (4) est montée pivotante.
  5. Rasoir selon la revendication 4,
    caractérisé en ce que,
    la tête de rasage (4) peut être pivotée autour d'un axe s'étendant parallèlement à l'axe longitudinal des éléments de rasage.
  6. Rasoir selon l'une des revendications précédentes,
    caractérisé en ce que ,
    le moteur électrique (2) présente une broche d'entraînement (12), qui s'engage dans une plaque oscillante (14) logée dans la tête de rasage (4).
  7. Rasoir selon l'une des revendications précédentes,
    caractérisé en ce que ,
    la fréquence d'excitation d'oscillation de la tête de rasage (4) est supérieure à la fréquence de résonance.
  8. Rasoir selon l'une des revendications précédentes,
    caractérisé en ce que ,
    les deux composants d'entraînement (7, 8) peuvent être entraînés de façon oscillante l'un par rapport à l'autre et par rapport au boîtier (1).
EP20070725347 2006-07-20 2007-05-18 Rasoir électrique Active EP2043828B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610034050 DE102006034050A1 (de) 2006-07-20 2006-07-20 Elektrischer Rasierapparat
PCT/EP2007/004439 WO2008009322A1 (fr) 2006-07-20 2007-05-18 Rasoir électrique

Publications (2)

Publication Number Publication Date
EP2043828A1 EP2043828A1 (fr) 2009-04-08
EP2043828B1 true EP2043828B1 (fr) 2013-04-03

Family

ID=38421555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070725347 Active EP2043828B1 (fr) 2006-07-20 2007-05-18 Rasoir électrique

Country Status (7)

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

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JP4462261B2 (ja) * 2006-12-08 2010-05-12 パナソニック電工株式会社 電気かみそり
DE102008005549B4 (de) * 2008-01-23 2015-04-30 Braun Gmbh Rasiergerät mit einer Regelung des Untermessers und Verfahren zur Regelung des Untermessers eines Rasiergeräts
DE102008031132A1 (de) * 2008-07-01 2010-01-07 Braun Gmbh Elektrisches Kleingerät zum Entfernen von Haaren
DE102008031134B4 (de) * 2008-07-01 2010-10-07 Braun Gmbh Oszillierender Rotationsmotor sowie elektrisch betriebenes Kleingerät hierzu
EP2404715B1 (fr) * 2010-07-10 2012-11-28 Braun GmbH Rasoir électrique avec dispositif de coupe remplaçable

Also Published As

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

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