EP2043828A1 - Rasoir électrique - Google Patents

Rasoir électrique

Info

Publication number
EP2043828A1
EP2043828A1 EP07725347A EP07725347A EP2043828A1 EP 2043828 A1 EP2043828 A1 EP 2043828A1 EP 07725347 A EP07725347 A EP 07725347A EP 07725347 A EP07725347 A EP 07725347A EP 2043828 A1 EP2043828 A1 EP 2043828A1
Authority
EP
European Patent Office
Prior art keywords
shaving head
housing
electric motor
razor according
shaving
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.)
Granted
Application number
EP07725347A
Other languages
German (de)
English (en)
Other versions
EP2043828B1 (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

Links

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 known from DE-A 103 30 978.
  • 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 shear 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 only necessary a driven connection between the housing and the shaving head 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 shave and described in detail in DE-C 197 36 776, where realized there the opposite movement of the shear elements mechanically in another way and without the use of a linear motor is.
  • a preferred embodiment of the invention provides that the electric motor 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. 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.
  • 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.
  • FIG. 1 is a schematic representation of a dry shaving apparatus according to the invention
  • FIG. 2 shows a mechanical replacement model for the kinematics according to FIG. 1, FIG. - A -
  • Fig. 3 is a perspective view of a erfindunumbleen electric shaver
  • Fig. 4 shows the waveform of individual razor components of the razor according to the invention.
  • the shaver shown schematically in Fig. 1 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, switches and so on.
  • 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 1 1 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 kinematics just described with all the 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 drive pin 12 attached thereto, this drive element acts as a relatively stiff spring, as a result of which the spring element 21 bears. 4, the amplitude of the lower blade 13 is larger than the vibration amplitude of the first rotor 7.
  • Fig. 3 the upper part of a dry shaver is shown in a perspective view with broken housing 1, wherein 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 a 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 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 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 oscillating 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.
  • the shaving head 4 itself is connected by means of a forked shaving head carrier 6 to the housing 1, wherein the connection between the shaving head 4 and the shaving head support 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 vibratable system, which is excited via the leaf spring 15, the lower end portion 32 with the oscillating plate
  • Fig. 4 shows 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 mount 22 and the vibration in the housing. 1 equivalent.
  • 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

Landscapes

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

Abstract

L'invention concerne un rasoir électrique comprenant un boîtier (1) et une tête de coupe (4). La tête de coupe (4) est couplée au boîtier (1) par le biais d'au moins un premier élément élastique (6, 31) et comporte au moins un premier élément de coupe (5). Le rasoir électrique comprend en outre un moteur électrique (2) pour générer un mouvement d'oscillation de la tête de coupe (4) et un mouvement d'oscillation divergent d'au moins un deuxième élément de coupe (13). Le moteur électrique (2) comporte deux composants d'entraînement (7, 8), un premier composant d'entraînement (7) pouvant être entraîné de manière oscillante par rapport à un deuxième composant d'entraînement (8). L'un des composants d'entraînement (7) est relié au moins au deuxième élément de coupe (13). Le au moins deuxième élément de coupe (13) ou une pièce d'entraînement (12, 14) reliée à ce dernier est en liaison élastique avec la tête de coupe (4). Le moteur électrique (2) est disposé dans le 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 true EP2043828A1 (fr) 2009-04-08
EP2043828B1 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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JP5388188B2 (ja) * 2009-04-23 2014-01-15 株式会社泉精器製作所 往復式電気かみそり
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EP3300854B1 (fr) 2016-09-28 2020-06-10 Braun GmbH Rasoir électrique
EP3300850B1 (fr) * 2016-09-28 2019-10-23 Braun GmbH Rasoir électrique
EP3300844B1 (fr) * 2016-09-28 2020-04-15 Braun GmbH Rasoir électrique
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EP3396828B1 (fr) 2017-04-27 2021-08-18 Braun GmbH Appareil électrique de soins personnels
EP3396821B1 (fr) * 2017-04-27 2023-06-14 Braun GmbH Rasoir électrique
EP3396826B1 (fr) 2017-04-27 2022-10-19 Braun GmbH Appareil électrique pour soin personnel
EP3396827B1 (fr) * 2017-04-27 2023-06-28 Braun GmbH Appareil électrique pour soins personnels
CN107696068A (zh) * 2017-11-17 2018-02-16 湖北科技学院 一种无声理发器
CN110405814B (zh) * 2019-08-19 2024-01-30 上海奔腾电工有限公司 电动剃须刀
CN115816515A (zh) * 2022-12-26 2023-03-21 深圳术叶创新科技有限公司 电动剃须刀

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Also Published As

Publication number Publication date
JP2009543620A (ja) 2009-12-10
US20090165305A1 (en) 2009-07-02
US8806756B2 (en) 2014-08-19
WO2008009322A1 (fr) 2008-01-24
CN101489738B (zh) 2013-10-16
RU2009105887A (ru) 2010-08-27
DE102006034050A1 (de) 2008-01-24
EP2043828B1 (fr) 2013-04-03
RU2438860C2 (ru) 2012-01-10
CN101489738A (zh) 2009-07-22
JP5179489B2 (ja) 2013-04-10

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