EP2051837B1 - Procede pour determiner l'encrassement d'un instrument de coupe electrique et tondeuse - Google Patents

Procede pour determiner l'encrassement d'un instrument de coupe electrique et tondeuse Download PDF

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Publication number
EP2051837B1
EP2051837B1 EP07801454.5A EP07801454A EP2051837B1 EP 2051837 B1 EP2051837 B1 EP 2051837B1 EP 07801454 A EP07801454 A EP 07801454A EP 2051837 B1 EP2051837 B1 EP 2051837B1
Authority
EP
European Patent Office
Prior art keywords
parameter
cutting tool
changes
threshold value
motor
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
EP07801454.5A
Other languages
German (de)
English (en)
Other versions
EP2051837A2 (fr
Inventor
Holger Hild
Thomas Hohmann
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 EP2051837A2 publication Critical patent/EP2051837A2/fr
Application granted granted Critical
Publication of EP2051837B1 publication Critical patent/EP2051837B1/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
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • 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
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/3873—Electric features; Charging; Computing devices
    • B26B19/388—Sensors; Control

Definitions

  • the present invention relates to a method for determining the contamination of an electrically driven cutting tool and a hair trimmer with a device for determining the contamination of its electrically driven cutting tool.
  • this method finds favored application for determining and indicating the degree of soiling of a cutting tool that performs a reciprocating motion and is driven by, for example, an oscillating electric motor or a linear motor.
  • Hair trimmers with such a cutting tool are, for example, electric shavers, beard trimmers or the like.
  • a method of controlling an oscillating electric motor provided for, for example, driving an electric shaver or an electric toothbrush is known.
  • an electric current is supplied to a coil of the electric motor at a certain time to form a magnetic field emanating from a first engine component and acting on a second engine component such that the second engine component is vibrated relative to the first engine component.
  • At the time when a current is supplied to the coil at least one electrical characteristic of the coil is determined, which is related to the state of movement of the first or the second engine component, for example, the voltage applied to the coil and / or the current flowing through the coil and / or the temporal change of the current flowing through the coil.
  • the future power supply to the coil ie the control of the oscillating electric motor is dependent on the / the determined characteristic / n. Furthermore, in the DE 10229319 A1 describes how the vibration frequency and the vibration amplitude of the engine components can be determined.
  • a razor which has a vibration sensor in the form of a piezoelectric element for determining the contamination.
  • An output signal proportional to the amplitude of the vibration is supplied to a control circuit which determines the thickness of a bar from the signal.
  • the shaver operating time is detected and an indication is activated when the product of beard thickness and operating time exceeds a threshold.
  • the shaver is driven by a rotating DC motor whose rotational speed can be controlled depending on the thickness of the beard.
  • the US 2005/0144784 A1 describes a razor that can be switched by means of a switch between a normal drive mode and a cleaning drive mode.
  • the drive unit can be designed as a linear motor or rotary motor.
  • the drive frequency of the drive unit is adjusted by a control signal depending on the status of an on / off signal of the switch from a controller.
  • the shaver may further include an indicator indicating the need for cleaning.
  • the controller sends a signal that the drive unit is operated in the normal drive mode to an integration timer. This integration timer can integrate the time in which the drive unit is operated in the normal drive mode. If the total time exceeds a threshold TS, the indicator can be activated via a signal to the controller.
  • the parameter is, cf. for example DE 10229319 A1 , According to the invention determined as a function of continuous measurements of the motor current and / or the motor voltage and / or the temporal changes of the motor current.
  • the control of the oscillating electric motor or linear motor causes the cutting tool driven by the oscillating electric motor or linear motor always moves with the correct frequency and / or amplitude even with load fluctuations, ie with the frequency and / or amplitude to which the cutting tool tuned with its drive is.
  • the inventive method is based on the finding that changes in the characteristic are caused by changes in the current load of the cutting tool, these load fluctuations both by changing the operating state (idling, cutting, on or off the drive, etc.) as well as by each Cutting event can be caused.
  • the cutting tool performs a reciprocating motion and is driven by an oscillating electric motor or linear motor.
  • the shaver contains a clog indicator, which is activated as necessary to allow the shaver to be cleaned in due course.
  • the following method steps are carried out continuously, wherein in a shaver, the vibration frequency of the engine components, for example, 400 Hz, and preferably at least during each half-oscillation, a characteristic is determined, which is related to the respective state of motion of the cutting tool.
  • the first step of the method is to obtain a characteristic related to the respective amplitude of movement of the cutting tool.
  • This can, for example, in the from the DE 10229319 A1 done known manner.
  • the voltage applied to a coil of the electric motor and / or the current flowing through the coil and / or the time change of the current flowing through the coil are detected, and from this a parameter for the amplitude of the movement of the Determined cutting tool.
  • the determined parameter is stored, and a subsequently determined parameter is compared with the previously stored parameter.
  • a thus determined change in the characteristic may have a positive or negative sign, and is caused during shaving by load fluctuations, which may be due to the individual cutting operations or may be caused by varying degrees of pressing the shaving head to the skin.
  • the detection rate of the parameters for controlling the oscillating motor which oscillates at about 400 Hz, takes place at 800 Hz, since in the described exemplary embodiment a parameter is detected at each half-oscillation.
  • the evaluation of the parameters for determining the pollution does not have to be done at the same rate. For example, only every second parameter can be used for the evaluation. A stored parameter would thus be compared with the next but one parameter.
  • the frequency of the evaluation of the parameter for determining the contamination can thus be lower than the frequency with which the parameter is detected.
  • the characteristic change is compared with at least one threshold value.
  • a negative characteristic change is compared with a first threshold value and a positive characteristic change with a second threshold value.
  • a positive characteristic change arises, for example, in that the contact pressure decreases while the shaving head is guided over the skin during shaving or lifted off the skin.
  • the second threshold value is preferably selected such that, on the one hand, at least one lifting of the shaving head from the skin and the associated relief of the drive can be detected and, on the other hand, if necessary, small positive characteristic changes caused by disturbing influences are suppressed.
  • Positive characteristic changes, which are greater than the second threshold thus mean that the shaving head Had contact with the skin, and therefore, for example, is contaminated by skin fat.
  • a negative characteristic change arises, for example, in that at least a certain number of whiskers were cut and thereby the cutting tool was decelerated. Negative characteristic changes, the amount of which is greater than the first threshold, thus means that whiskers were cut, and therefore the shaving head is polluted by whitewash.
  • the pulses generated due to negative characteristic changes are more weighted when counting up the pollution counter than the pulses generated due to positive characteristic changes, since the pollution by whitewash requires cleaning of the shaving head rather than contamination by skin fat.
  • the magnitude of the first threshold value may also be selected differently than the magnitude of the second threshold value.
  • the count of the contamination counter is compared with a reference value corresponding to a certain contamination of the cutting tool.
  • the reaching or exceeding of the reference value is then displayed. This can be done in a conventional manner by a visual, audible or other indication.

Landscapes

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

Claims (5)

  1. Procédé pour la détermination de l'encrassement d'un outil de coupe à commande électrique qui est entraîné par un moteur électrique ou un moteur linéaire oscillant et qui effectue un mouvement de va-et-vient, par ce procédé, une grandeur caractéristique étant évaluée pour le mouvement de l'outil de coupe, grandeur qui est utilisée pour la commande du moteur électrique ou du moteur linéaire oscillant,
    caractérisé en ce que la grandeur caractéristique est déterminée en fonction de mesures continuelles du courant du moteur et/ou de la tension du moteur et/ou de l'évolution temporelle du courant du moteur,
    dans lequel les modifications continuelles de la grandeur caractéristique sont saisies et enregistrées comme événement d'encrassement dans la mesure où l'ampleur d'une modification est supérieure à une valeur seuil,
    dans lequel une première et une seconde valeur seuil sont prévues et des modifications négatives de la grandeur caractéristique sont comparées à la première valeur seuil et des modifications positives de la grande caractéristique sont comparées à la deuxième valeur seuil.
  2. Procédé selon la revendication 1,
    caractérisé en ce que,
    une grandeur caractéristique est utilisée pour l'amplitude du mouvement de l'outil de coupe.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que,
    un compteur est prévu pour le comptage des événements d'encrassement et en ce que des modifications négatives de la grandeur caractéristique sont pondérées davantage lors du comptage que les modifications de la grandeur caractéristique.
  4. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que,
    l'absence de modifications soit négatives soit positives de la grandeur caractéristique entraîne que la pondération des modifications détectées de la grandeur caractéristique se fait avec une valeur modifiée.
  5. Dispositif de coupe de cheveux muni d'un outil de coupe à commande électrique qui est conçu de manière à effectuer un mouvement de va-et-vient et d'un moteur électrique ou un moteur linéaire oscillant qui est conçu de manière à entraîner l'outil de coupe et de moyens d'évaluation d'une grandeur caractéristique pour le mouvement de l'outil de coupe qui est utilisé pour la commande du moteur électrique ou du moteur linéaire oscillant, dans lequel ce moyen est conçu en vue de déterminer la grandeur caractéristique en fonction de mesures continuelles du courant du moteur et/ou de la tension du moteur et/ou de l'évolution temporelle du courant du moteur ; dans lequel les modifications continuelles de la valeur caractéristique sont déterminées et enregistrées comme événement d'encrassement, dans la mesure où l'ampleur d'une modification est plus grande qu'une valeur seuil, dans lequel une première et une deuxième valeur seuil sont prévues et des modifications négatives de la grandeur caractéristique sont comparées à la première valeur seuil et des modifications positives de la grandeur caractéristique sont comparées à la deuxième valeur seuil.
EP07801454.5A 2006-08-14 2007-07-26 Procede pour determiner l'encrassement d'un instrument de coupe electrique et tondeuse Active EP2051837B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610038126 DE102006038126A1 (de) 2006-08-14 2006-08-14 Verfahren zur Bestimmung der Verschmutzung eines elektrisch angetriebenen Schneidwerkzeugs und Haarschneidegerät
PCT/EP2007/006622 WO2008019754A2 (fr) 2006-08-14 2007-07-26 Procédé pour déterminer l'encrassement d'un instrument de coupe électrique et tondeuse

Publications (2)

Publication Number Publication Date
EP2051837A2 EP2051837A2 (fr) 2009-04-29
EP2051837B1 true EP2051837B1 (fr) 2019-05-15

Family

ID=38954752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07801454.5A Active EP2051837B1 (fr) 2006-08-14 2007-07-26 Procede pour determiner l'encrassement d'un instrument de coupe electrique et tondeuse

Country Status (7)

Country Link
US (1) US9114542B2 (fr)
EP (1) EP2051837B1 (fr)
JP (1) JP5208941B2 (fr)
CN (1) CN101505929B (fr)
DE (1) DE102006038126A1 (fr)
RU (1) RU2441745C2 (fr)
WO (1) WO2008019754A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103068338B (zh) * 2010-08-19 2015-05-13 博朗有限公司 用于操纵电器的方法和电器
CN106457582B (zh) * 2014-06-20 2019-02-26 皇家飞利浦有限公司 具有清洁指示器的电动剃须刀

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69808400T2 (de) * 1997-08-04 2003-07-31 Izumi Products Co., Matsumoto Elektrischer Rasiererapparat
US20050144784A1 (en) * 2002-06-12 2005-07-07 Yasuo Ibuki Electric razor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4583027A (en) * 1982-12-27 1986-04-15 Hitachi Metals International, Ltd. Moving magnet linear motor
JP3171868B2 (ja) * 1991-04-15 2001-06-04 松下電工株式会社 電気かみそり
JPH04314487A (ja) * 1991-04-15 1992-11-05 Matsushita Electric Works Ltd 電気かみそり
US5274735A (en) * 1991-12-16 1993-12-28 Sanyo Electric Co., Ltd. Electric shaver
JPH0538387A (ja) * 1992-01-28 1993-02-19 Matsushita Electric Works Ltd 電気かみそり
CN1045915C (zh) * 1994-03-28 1999-10-27 松下电工株式会社 往复运动型干式剃须器
DE19743853C1 (de) * 1997-10-04 1998-11-26 Braun Ag Verfahren zur Bestimmung der Menge des von einem elektrisch angetriebenen Schneidwerkzeug geschnittenen Schneidguts sowie Schaltungsanordnung zur Durchführung des Verfahrens
DE10229319A1 (de) * 2002-06-29 2004-01-29 Braun Gmbh Verfahren zum Steuern eines oszillierenden Elektormotors eines elektrischen Kleingeräts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69808400T2 (de) * 1997-08-04 2003-07-31 Izumi Products Co., Matsumoto Elektrischer Rasiererapparat
US20050144784A1 (en) * 2002-06-12 2005-07-07 Yasuo Ibuki Electric razor

Also Published As

Publication number Publication date
JP2010500137A (ja) 2010-01-07
EP2051837A2 (fr) 2009-04-29
JP5208941B2 (ja) 2013-06-12
WO2008019754A2 (fr) 2008-02-21
RU2441745C2 (ru) 2012-02-10
CN101505929B (zh) 2012-08-08
RU2009109190A (ru) 2010-09-27
WO2008019754A3 (fr) 2008-06-05
US20110197455A1 (en) 2011-08-18
US9114542B2 (en) 2015-08-25
CN101505929A (zh) 2009-08-12
DE102006038126A1 (de) 2008-02-21

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