EP2074905B1 - Device for applying a cosmetic composition comprising a heating element - Google Patents

Device for applying a cosmetic composition comprising a heating element Download PDF

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Publication number
EP2074905B1
EP2074905B1 EP08171359A EP08171359A EP2074905B1 EP 2074905 B1 EP2074905 B1 EP 2074905B1 EP 08171359 A EP08171359 A EP 08171359A EP 08171359 A EP08171359 A EP 08171359A EP 2074905 B1 EP2074905 B1 EP 2074905B1
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EP
European Patent Office
Prior art keywords
power
heater member
voltage
electrical energy
energy source
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.)
Not-in-force
Application number
EP08171359A
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German (de)
French (fr)
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EP2074905A1 (en
Inventor
Nicolas Duru
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.)
LOreal SA
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LOreal SA
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Publication date
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Publication of EP2074905A1 publication Critical patent/EP2074905A1/en
Application granted granted Critical
Publication of EP2074905B1 publication Critical patent/EP2074905B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2/00—Hair-curling or hair-waving appliances ; Appliances for hair dressing treatment not otherwise provided for
    • A45D2/48—Eyelash curlers; Eyebrow curlers
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
    • A45D40/26—Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D2200/00—Details not otherwise provided for in A45D
    • A45D2200/15—Temperature
    • A45D2200/155—Heating or cooling means, i.e. for storing or applying cosmetic products at a predetermined temperature
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1046—Brush used for applying cosmetics
    • A46B2200/1053—Cosmetics applicator specifically for mascara
    • A46B2200/106—Cosmetics applicator specifically for mascara including comb like element

Definitions

  • the present invention relates to devices for applying a composition, in particular a cosmetic composition, by means of a heating element.
  • the invention relates more particularly to the application devices powered from an autonomous source of electrical energy, such as one or more batteries or accumulators.
  • Such application devices are known, in particular for applying a composition to the eyelashes.
  • this circuit for managing the power supply of the heating member is arranged to feed the heating member according to at least two different regimes depending at least on the state of exhaustion of the source. of autonomous electric energy.
  • the invention can make it possible to regulate the temperature of the electric heating element without necessarily providing a temperature-sensitive sensor, which can simplify the electrical circuit of the device and reduce its cost.
  • the invention can make it possible to deliver a substantially constant electrical energy to the heating element independently of the state of exhaustion of the source of electrical energy.
  • the power supply management circuit can be arranged to transfer to the heating member in a power regime, said under-power regime, only a portion of the electrical energy that can be delivered by the source.
  • Such a power regime corresponds, for example, to the case where the source of autonomous electrical energy is at full capacity and the electric heating element is at the temperature of use (also called the service temperature), this being for example between 50 ° C and 90 ° C, especially between 60 ° C and 70 ° C.
  • the electric power to be dissipated by the heating member may be less than that which would dissipate the heating member if it was connected directly and continuously to the electrical source.
  • the power supply management circuit can be arranged to transfer to the heating member, according to another power regime, said full power regime, all of the electrical energy that can be delivered by the source.
  • Such a feeding regime corresponds, for example, to the case where the heating element is brought from the ambient temperature to the temperature of use or in the case where the source of electrical energy no longer has its full capacity, the remaining capacity being for example less than half of its full capacity.
  • the power supply management circuit can be further arranged to supply the heating element with a so-called supercharging regime, in which the electric power dissipated by the heating element is greater than that required to maintain it at the operating temperature.
  • This supercharging regime is for example useful to very quickly bring the heating member to its operating temperature or to bring the heating member to a temperature facilitating the removal of the product, higher than the operating temperature, for example a higher temperature of more than 10 ° C.
  • the power management circuit comprises a switching power supply arranged to operate in a step-down mode according to one of the power regimes, for example the undernourishment regime above, and to operate in boost mode in another power regime, for example the supercharging regime above.
  • the boost mode can also compensate for the depletion of the energy source.
  • the switching power supply can in embodiments of the invention operate only in the step-down mode or in the boost mode.
  • the heating member can dissipate an electric power greater than that which would be dissipated by directly connecting the heating element to the autonomous electric power source, the supply voltage coming from the switching power supply being higher.
  • the power management circuit can be arranged to select the power supply regime of the heating member not only according to the state of exhaustion of the autonomous power source but also the operating phase. of the device, namely for example the heating of the heating member to a service temperature, or maintaining it at the operating temperature or setting the heating member to a temperature higher than the operating temperature.
  • the power supply management circuit may comprise at least one microcontroller and at least one electronic switching member.
  • the heating member may be mounted in series with the electronic switching member, the latter being controlled by the microcontroller.
  • the switching power supply can be realized using the microcontroller and the electronic switching device or with the aid of specialized components.
  • the power supply management circuit can be arranged to feed the heating member continuously and, according to at least one other feed regime, to feed the heating member in a cyclic manner according to a feeding regime.
  • the duty cycle is for example between 10% and 100%, for example between 67% and 100%.
  • the power supply of the heating element can be performed with a variable duty cycle and the power regimes can differ by the values of the duty cycle.
  • the duty cycle can be determined by the microcontroller according to the state of exhaustion of the source of autonomous electrical energy, the state of exhaustion of the autonomous power source being for example characterized by the voltage at its terminals.
  • the duty cycle can for example increase to compensate for the decrease of the voltage across the power source, in order to maintain the heating member at the operating temperature, for example by making the power dissipated by the body heating is substantially constant.
  • the invention does not exclude the use of a temperature sensor to regulate more finely the temperature, for example.
  • the device may comprise only one heating member, the latter having only one resistive wire for example, being powered by two conductors.
  • the device comprises two heating members that can be used to heat the same surface of the device used for the application of the product and the power supply management circuit is arranged to feed the one and / or the other of the heating member (s) depending for example on the state of exhaustion of the source of autonomous electrical energy.
  • the power supply management circuit can be arranged for, according to a power regime, supply simultaneously the two heating members.
  • a power regime corresponds for example to the case where the applicator must be brought quickly to the operating temperature after it is started and where the electrical power to be dissipated is maximum.
  • the power supply management circuit can be arranged for, according to another power regime, feeding only one of the two heating elements.
  • the choice of the heating member that is powered is for example based on the electrical power that is able to dissipate the heating member according to the voltage of the energy source.
  • one or other of the heating organs can be powered, according to its own electrical characteristics.
  • the power supply management circuit can be arranged to selectively supply one or the other of the heating elements, depending on the state of exhaustion of the source in particular.
  • the other heating member can to be fed too.
  • the heating members may be mounted in parallel branches, each branch having in series the heating member and an electronic switching member controlled by the power supply management circuit, for example by the aforementioned microcontroller.
  • the heating members may also be mounted in series, the power supply management circuit comprising a switching system arranged to feed all or only a portion of the heating organs, depending on the state of exhaustion of the autonomous electrical energy source in particular.
  • the electrical circuit of the device may comprise a timing system arranged to limit the duration of at least one operating phase of the device and / or at least one power regime, to a predefined value. This duration can be variable depending on the state of exhaustion of the energy source.
  • the device is for example arranged to measure the voltage V s of the source and then determine, for example by calculation or access to a table, the corresponding duration of the operating phase and / or the power regime.
  • This regulation with variable duty cycle can comprise a periodic measurement of the voltage V s of the source in order to know its state of exhaustion and the duty cycle can be modified accordingly, being for example constant between two consecutive readings of the voltage of the source.
  • the applicator may include an audible and / or visual indicator to indicate the exhaustion of the autonomous electrical energy source and / or indicate whether the temperature of the heating element has reached a predefined value, notably the operating temperature.
  • the voltage V smax of the autonomous electrical energy source at full capacity, may be greater than the supply voltage V w of the heating element necessary to maintain it at its operating temperature when continuously supplied, the voltage V for example, smax being greater than 1.2 times V w .
  • the power supply management circuit of the heating element can be arranged to measure the voltage V s of the autonomous electrical energy source at the start of the device and to supply the heating element continuously for a period of time. predefined T 1 , depending on the voltage thus measured, in order to bring the heating member to the operating temperature or at a higher temperature, for sampling the product.
  • the heating element can be fed with a duty cycle and the power regimes can differ by the values of the duty cycle.
  • the first degree of exhaustion may correspond to the full capacity of the source.
  • the application device 1 shown in FIG. figure 1 comprises a housing 2 housing an autonomous electrical energy source 3 and an electric heating element 4, powered from this source of autonomous electrical energy 3 by an electric circuit 10, examples of which are shown in FIGS. figures 2 , 3 , 7 and 9 .
  • the application device 1 may have different shapes, the housing 2 being preferably elongated.
  • the heating member 4 shown in FIG. figure 1 extends in the extension of the longitudinal axis of the housing.
  • the heating member 1 may extend generally transversely to this longitudinal axis, as illustrated in FIG. figure 2 .
  • the heating member 4 may comprise at least one electrical resistance, for example a nickel-chromium alloy wire.
  • the heating member may for example be as described in one of the applications US 5,853,010 , US 2006/0005851 or JP 2003-3100335 .
  • the autonomous power source 3 may comprise one or more 1.5 V batteries, for example of AAA or AA format, or one or more accumulators, for example of the NiMH or lithium polymer type.
  • the heating member 4 may be carried by a support which is for example molded of plastic material in one piece with at least a portion of the housing 2. This support may bear only the electric heating member 4 and no temperature sensor for measuring the temperature of the heating member.
  • the support may comprise, if necessary, reliefs such as teeth, intended to comb the eyelashes and / or at least one protective relief intended to protect the user in case of accidental contact with the heating member 4, for example transverse ribs covering the heating member.
  • the device 1 may optionally comprise a protective cover 8 from covering the electric heating member 4 in the absence of use.
  • the housing 2 may comprise a switch 12 on / off and possibly one or more light indicators not shown, for example to signal to the user that the power supply of the heating member is in progress or the need to change the autonomous power source, among others.
  • the device may optionally be associated with a charging station for charging the accumulator (s).
  • the device comprises an electrical circuit 10 supplying the heating element 4 from the source 3, which is shown diagrammatically in FIG. figure 3 , comprising means 11 for managing the power supply of the heating member 4.
  • These means 11 comprise for example a microcontroller programmed to fulfill all or part of the desired functions.
  • the circuit 10 may include a delay which maintains the power supply of the electric heating element 4 for a certain period of time after the applicator has been started by the user.
  • the management means 11 are for example supplied when the switch 12 is closed, and the supply of the heating member can then be done with a variable power regime, according to for example that the heating member is used to apply of the product or perfect a make-up or must be quickly brought to temperature.
  • the heating member 4 is, for example, arranged to be supplied with a nominal operating voltage V w during its use to apply the product or to complete a makeup, the supply at this voltage ensuring the maintenance of the heating member at a temperature for example, between 60 and 70 ° C.
  • the voltage of the autonomous power source V smax at full capacity, is greater than V w .
  • V w is for example 2V and V smax is for example 3.2 V.
  • the supply of the heating member takes place at V smax for example to quickly bring the heating member to temperature.
  • the power supply at a voltage V w less than the voltage V s of the source is for example obtained by means of a switched-mode power supply, produced for example from the component marketed under the reference LT 1173 by the company LINEAR TECHNOLOGY according to the the figure 10 .
  • the autonomous power source 3 comprises two 1.5 V batteries and the values of L1, R1, R2 and C2 are chosen respectively equal to 220 ⁇ H, 100 k ⁇ and 220 ⁇ F and V w is 2V.
  • the circuit 10 can be further arranged to measure the voltage V s across the autonomous power source, compare it with the nominal operating voltage V w of the heating member and, depending on the result of the comparison, act on the power regime of the electric heating element.
  • the management means 11 are, for example, arranged for, when the voltage delivered by the source 3 is greater than V w , supplying the heating member 4 with a duty ratio of less than 100%, all the more low as the difference
  • the circuit 10 is arranged to deliver to the heating member 4 continuously a voltage substantially equal to V w .
  • a switching power supply operating as an elevator can be used for this purpose.
  • the circuit 10 does not make it possible to raise the voltage of the source 3.
  • FIG. 4 Another example circuit 10 according to the invention wherein the heating member 4 is connected in series with an electronic switching member 13, for example a MOSFET transistor.
  • an electronic switching member 13 for example a MOSFET transistor.
  • the management means 11 of the power supply are continuously supplied by the source 3 but can go from a standby state, in which their power consumption is very low, to an active state where a certain regulation of the temperature of the heating member is ensured.
  • the switch 12 can in this case be in fugitive contact and associated with the management means 11. If necessary, an additional switch cutting the general power supply, not shown, can be provided.
  • the circuit management means 11 comprise in the example described a microcontroller arranged to, after detection of a change of state of the switch 12, to go from the standby state to the active state.
  • the microcontroller can be arranged to, in the active state, regulate the temperature of the heating element by acting on the electronic switching member 13.
  • the power supply of the heating member 4 is effected according to a variable regime depending on the state of exhaustion of the autonomous power source.
  • the management means 11 can be arranged to cut the voltage V s so that the average value of the voltage across the electric heating member 4 substantially corresponds to V w , when V s is greater than V w .
  • the management means 11 can in particular act on the duty cycle of the supply of the electric heating element by controlling the opening or closing of the electronic switching member 13, the duty ratio being defined as the value ⁇ / T as illustrated at figure 6 .
  • the voltage may for example be cut at a frequency 1 / T between 1 Hz and 100 kHz, for example 1kHz.
  • the duty cycle is for example 67% at the beginning, then increases to as the voltage V s across the source 3 decreases.
  • the heating element is fed continuously at 2V, its temperature remains between 60 and 70 ° C, for example.
  • the duty cycle is substantially equal to 100%.
  • the microcontroller can store a table of correspondence between the voltage V s and the duty cycle to be applied to the supply voltage of the heating member 4. This table is adapted to a heating element of use voltage V w predefined.
  • the management means 11 may be arranged to signal it to the user, for example by a visual or audible signal.
  • the power supply of the heating member 4 is carried out according to different regimes depending on the state of exhaustion of the autonomous electrical energy source and / or the operating phase of the applicator, namely on the one hand the service temperature setting or a higher temperature of the electric heating element, or on the other hand the maintenance thereof at the operating temperature.
  • the microcontroller detects this action in step 101 and supplies the heating member 4 in a first power regime, corresponding to a heat-up phase.
  • This first feed regime can rapidly raise the temperature of the heater from room temperature when the application device is turned on for use.
  • the heating element can be supercharged, that is to say that the electrical power it dissipates is greater than that corresponding to its maintenance at the operating temperature.
  • the heating member is for example supplied at a voltage greater than V s .
  • a switching power supply as shown in FIG. figure 11 is for example used to raise the voltage supplied to the heating member.
  • the autonomous power source 3 comprises two 1.5 V batteries and the L and C values are respectively chosen equal to 100 ⁇ H and 100 ⁇ F so that the voltage supplied at the output is equal to 5V for a voltage 3V input.
  • step 102 the power supply management means 11 for example measure the voltage V s and act on the switching member 13 to temporarily supply the heating member 4 for a predefined period of time, according to an equal duty cycle. at about 100%.
  • the heating member can, as indicated above, according to this first power regime, be supplied with a voltage greater than its operating voltage V w , which can reduce the heating time.
  • the power management means 11 determine the duration T 1 during which the heating member 4 must be powered according to the first power regime.
  • the microcontroller for example stores a correspondence table between the voltage V s initially measured and the duration T 1 .
  • the duration T 1 can respectively be equal to 20s, 30s and 40s.
  • the duration of the power supply phase of the high-power heating element can be even lower as the degree of exhaustion of the source 3 is low.
  • the heating member 4 is fed during the duration T 1 during step 103.
  • step 104 the voltage V s of the autonomous electrical power source 3 is again measured by the power management means 11 which can then feed the heating member according to at least a second power supply.
  • supply corresponding for example to an operating phase where the heating member is at the operating temperature and must be maintained at this temperature, which assumes a power supply of the heating member at a lower power than that of the first regime power.
  • the management means 11 may, for example, determine the duty cycle as a function of the voltage measured in step 104.
  • This duty cycle is, for example, predefined by a correspondence table stored in the microcontroller, having for input for example the voltage V s .
  • the duty cycle is determined by the microcontroller according to a mathematical function whose variable is V s .
  • the heating member can be fed at step 105 with a determined duty cycle for a duration T 2 , after which the management means 11 detect in step 106 whether the switch 12 is still actuated, to which case the operation according to steps 104 and 105 is continued and, if not, the device returns to the standby mode of step 100.
  • the device may comprise two heating members 4 and 4 'may for example be powered independently of one another.
  • the two heating members are, for example, arranged on the support of the application device on the same side thereof, for example being superposed, nested or juxtaposed.
  • the heating elements 4 and 4 ' have different nominal operating voltages V w and V w .
  • the heating member 4 has for example a nominal operating voltage V w greater than a threshold threshold voltage V predefined and the heating member 4 'has for example a nominal operating voltage V w less than the threshold voltage V threshold .
  • the value of this threshold voltage can be recorded in the microcontroller.
  • V threshold is for example about 0.8 V smax .
  • the power management means 11 are arranged to measure the voltage V s of the autonomous electrical energy source and to select the heating element or members to be powered according to the voltage V s and / or the phase of the operation, namely the heating of the electric heating element or maintaining it at the temperature of use.
  • the device corresponding to the diagram of the figure 7 can operate in at least three feeding regimes, as illustrated in figure 8 .
  • Steps 100 and 101 are similar to those described with reference to the figure 5 .
  • step 202 the power management means 11 control the simultaneous supply of the two heating members by acting on the switching members 13 and 13 'associated and measure the voltage V s at the terminals of the source 3.
  • the management means 11 can at this step 202 determine the duration T 1 of the first power regime as a function of a table of correspondence between the initial voltage V s and the duration T 1 stored in the microcontroller.
  • This duration T 1 corresponds for example to the time allowing the applicator to reach the desired temperature, and can thus be shorter when the autonomous energy source is fully charged and longer after partial exhaustion thereof.
  • the heating members 4 and 4 ' are for example fed simultaneously.
  • step 203 after this phase of warming up the applicator, the voltage V s at the terminals of the autonomous power source is again measured.
  • step 204 the management means 11 determine, according to the measured value and the nominal operating voltage of each of the heating members 4 and 4 ', which of the heating members 4 or 4' must be powered.
  • the heating element 4 is supplied with a second supply regime at step 205 and if the voltage V s is below this threshold voltage, the heating member 4 'is fed with a third feed regime at step 205.
  • the supply of the heating elements in step 205 can be done continuously or in a predefined duty cycle which depends on the voltage V s in a variant
  • Step 205 is performed for a predefined duration T 2 .
  • Step 106 is similar to that described with reference to figure 5 .
  • the two heating members 4 and 4 ' are electrically connected in series and may or may not be connected to a midpoint, which allows for example to feed only one of the heating organs by shorting the other.
  • the application device may comprise more than two heating members.
  • the housing may comprise a switch for switching on by heating element.
  • the means for managing the power supply of the heating member may not include a microcontroller, the latter being for example replaced by a dedicated analog circuit.
  • the intensity traversing the heating element can be measured in order to detect exhaustion of the source and the duty cycle can for example be increased and / or the high supply voltage so that to maintain the current at a preset value.

Abstract

The device has an electric heating unit (4) e.g. electrical resistor such as nickel-chromium alloy wire, supplied from an independent electrical energy source (3) e.g. 1.5 volts battery, and an electric control circuit (10) controlling a power supply of the heating unit. The control circuit supplies power to the heating unit along two different rates based on a depletion state of the independent electrical energy source. The heating unit is mounted in series with an electronic switching unit (13) i.e. MOSFET, that is controlled by a microcontroller (11). An independent claim is also included for a method for controlling supply of an electric heating unit.

Description

La présente invention concerne les dispositifs d'application d'une composition, notamment cosmétique, au moyen d'un organe chauffant.The present invention relates to devices for applying a composition, in particular a cosmetic composition, by means of a heating element.

L'invention concerne plus particulièrement les dispositifs d'application alimentés à partir d'une source d'énergie électrique autonome, telle qu'une ou plusieurs piles ou accumulateurs.The invention relates more particularly to the application devices powered from an autonomous source of electrical energy, such as one or more batteries or accumulators.

De tels dispositifs d'application sont connus, notamment pour appliquer une composition sur les cils.Such application devices are known, in particular for applying a composition to the eyelashes.

La demande US 2006/0005851 divulgue un dispositif dans lequel une régulation de la température de l'organe chauffant est effectuée au moyen d'un capteur de température et d'un contrôle du courant selon le signal délivré par ce capteur de température. Une telle régulation, qui repose sur l'emploi d'un capteur de température, est relativement complexe et coûteuse. En outre, la régulation ne prend pas en compte l'état d'épuisement de la source d'énergie électrique alimentant l'organe chauffant.Requirement US 2006/0005851 discloses a device in which a regulation of the temperature of the heating member is carried out by means of a temperature sensor and a current control according to the signal delivered by this temperature sensor. Such regulation, which relies on the use of a temperature sensor, is relatively complex and expensive. In addition, the regulation does not take into account the state of exhaustion of the source of electrical energy supplying the heating member.

Il existe un besoin pour perfectionner encore les dispositifs d'application d'une composition, comportant :

  • une source d'énergie électrique autonome,
  • un organe chauffant alimenté à partir de la source d'énergie électrique autonome, et
  • un circuit de gestion de l'alimentation électrique de l'organe chauffant.
There is a need to further improve the application devices of a composition, comprising:
  • an autonomous source of electrical energy,
  • a heating member powered from the autonomous electric power source, and
  • a circuit for managing the power supply of the heating element.

Selon un aspect de l'invention, ce circuit de gestion de l'alimentation électrique de l'organe chauffant est agencé pour alimenter l'organe chauffant selon au moins deux régimes différents en fonction au moins de l'état d'épuisement de la source d'énergie électrique autonome.According to one aspect of the invention, this circuit for managing the power supply of the heating member is arranged to feed the heating member according to at least two different regimes depending at least on the state of exhaustion of the source. of autonomous electric energy.

L'invention peut permettre d'effectuer une certaine régulation de la température de l'organe électrique chauffant sans nécessairement prévoir un capteur sensible à la température, ce qui peut permettre de simplifier le circuit électrique du dispositif et de diminuer son coût.The invention can make it possible to regulate the temperature of the electric heating element without necessarily providing a temperature-sensitive sensor, which can simplify the electrical circuit of the device and reduce its cost.

L'invention peut permettre de délivrer une énergie électrique sensiblement constante à l'organe chauffant indépendamment de l'état d'épuisement de la source d'énergie électrique.The invention can make it possible to deliver a substantially constant electrical energy to the heating element independently of the state of exhaustion of the source of electrical energy.

Le circuit de gestion de l'alimentation électrique peut être agencé pour ne transférer à l'organe chauffant dans un régime d'alimentation, dit régime de sous alimentation, qu'une partie de l'énergie électrique pouvant être délivrée par la source.The power supply management circuit can be arranged to transfer to the heating member in a power regime, said under-power regime, only a portion of the electrical energy that can be delivered by the source.

Un tel régime d'alimentation correspond par exemple au cas où la source d'énergie électrique autonome est à pleine capacité et l'organe électrique chauffant est à la température d'utilisation (encore appelée température de service), celle-ci étant par exemple comprise entre 50°C et 90°C, notamment entre 60°C et 70°C. Dans ce cas, la puissance électrique à dissiper par l'organe chauffant peut être inférieure à celle que dissiperait l'organe chauffant s'il était relié directement et en continu à la source électrique.Such a power regime corresponds, for example, to the case where the source of autonomous electrical energy is at full capacity and the electric heating element is at the temperature of use (also called the service temperature), this being for example between 50 ° C and 90 ° C, especially between 60 ° C and 70 ° C. In this case, the electric power to be dissipated by the heating member may be less than that which would dissipate the heating member if it was connected directly and continuously to the electrical source.

Le circuit de gestion de l'alimentation électrique peut être agencé pour transférer à l'organe chauffant, selon un autre régime d'alimentation, dit régime de pleine alimentation, la totalité de l'énergie électrique pouvant être délivrée par la source.The power supply management circuit can be arranged to transfer to the heating member, according to another power regime, said full power regime, all of the electrical energy that can be delivered by the source.

Un tel régime d'alimentation correspond par exemple au cas où l'organe chauffant est amené depuis la température ambiante à la température d'utilisation ou au cas où la source d'énergie électrique n'a plus sa pleine capacité, la capacité restante étant par exemple inférieure à la moitié de sa pleine capacité.Such a feeding regime corresponds, for example, to the case where the heating element is brought from the ambient temperature to the temperature of use or in the case where the source of electrical energy no longer has its full capacity, the remaining capacity being for example less than half of its full capacity.

Le circuit de gestion de l'alimentation électrique peut encore être agencé pour alimenter l'organe chauffant selon un régime dit de suralimentation, où la puissance électrique dissipée par l'organe chauffant est supérieure à celle nécessaire à son maintien à la température de service.The power supply management circuit can be further arranged to supply the heating element with a so-called supercharging regime, in which the electric power dissipated by the heating element is greater than that required to maintain it at the operating temperature.

Ce régime de suralimentation est par exemple utile pour amener très rapidement l'organe chauffant à sa température de service ou pour amener l'organe chauffant à une température facilitant le prélèvement du produit, supérieure à la température de service, par exemple une température supérieure de plus de 10°C.This supercharging regime is for example useful to very quickly bring the heating member to its operating temperature or to bring the heating member to a temperature facilitating the removal of the product, higher than the operating temperature, for example a higher temperature of more than 10 ° C.

Selon un exemple de réalisation, le circuit de gestion de l'alimentation comporte une alimentation à découpage agencée pour fonctionner en mode abaisseur selon l'un des régimes d'alimentation, par exemple le régime de sous-alimentation ci-dessus, et pour fonctionner en mode élévateur dans un autre régime d'alimentation, par exemple le régime de suralimentation ci-dessus. Le mode élévateur peut également permettre de compenser l'épuisement de la source d'énergie.According to an exemplary embodiment, the power management circuit comprises a switching power supply arranged to operate in a step-down mode according to one of the power regimes, for example the undernourishment regime above, and to operate in boost mode in another power regime, for example the supercharging regime above. The boost mode can also compensate for the depletion of the energy source.

L'alimentation à découpage peut dans des exemples de mise en oeuvre de l'invention ne fonctionner qu'en mode abaisseur ou qu'en mode élévateur.The switching power supply can in embodiments of the invention operate only in the step-down mode or in the boost mode.

Lorsque l'alimentation à découpage fonctionne en mode élévateur, l'organe chauffant peut dissiper une puissance électrique supérieure à celle qui serait dissipée en reliant directement l'organe chauffant à la source d'énergie électrique autonome, la tension d'alimentation issue de l'alimentation à découpage étant plus élevée.When the switched-mode power supply operates in a boost mode, the heating member can dissipate an electric power greater than that which would be dissipated by directly connecting the heating element to the autonomous electric power source, the supply voltage coming from the switching power supply being higher.

Le circuit de gestion de l'alimentation peut être agencé pour sélectionner le régime d'alimentation électrique de l'organe chauffant non seulement en fonction de l'état d'épuisement de la source d'énergie électrique autonome mais aussi de la phase de fonctionnement du dispositif, à savoir par exemple la mise à température de service de l'organe chauffant, ou le maintien de celui-ci à la température de service ou la mise de l'organe chauffant à une température supérieure à la température de service.The power management circuit can be arranged to select the power supply regime of the heating member not only according to the state of exhaustion of the autonomous power source but also the operating phase. of the device, namely for example the heating of the heating member to a service temperature, or maintaining it at the operating temperature or setting the heating member to a temperature higher than the operating temperature.

Le circuit de gestion de l'alimentation électrique peut comporter au moins un microcontrôlcur et au moins un organe de commutation électronique. L'organe chauffant peut être monté en série avec l'organe de commutation électronique, ce dernier étant commandé par le microcontrôleur. L'alimentation à découpage peut être réalisée à l'aide du microcontrôteur et de l'organe de commutation électronique ou à l'aide de composants spécialisés.The power supply management circuit may comprise at least one microcontroller and at least one electronic switching member. The heating member may be mounted in series with the electronic switching member, the latter being controlled by the microcontroller. The switching power supply can be realized using the microcontroller and the electronic switching device or with the aid of specialized components.

Le circuit de gestion de l'alimentation électrique peut être agencé pour alimenter, selon un régime d'alimentation, l'organe chauffant de façon continue et, selon au moins un autre régime d'alimentation, pour alimenter l'organe chauffant de façon cyclique. Le rapport cyclique est par exemple compris entre 10% et 100%, par exemple entre 67% et 100%.The power supply management circuit can be arranged to feed the heating member continuously and, according to at least one other feed regime, to feed the heating member in a cyclic manner according to a feeding regime. . The duty cycle is for example between 10% and 100%, for example between 67% and 100%.

L'alimentation de l'organe chauffant peut s'effectuer avec un rapport cyclique variable et les régimes d'alimentation peuvent différer par les valeurs du rapport cyclique.The power supply of the heating element can be performed with a variable duty cycle and the power regimes can differ by the values of the duty cycle.

Le rapport cyclique peut être déterminé par le microcontrôleur en fonction de l'état d'épuisement de la source d'énergie électrique autonome, l'état d'épuisement de la source d'énergie électrique autonome étant par exemple caractérisé par la tension à ses bornes. Ainsi, le rapport cyclique peut par exemple augmenter pour compenser la diminution de la tension aux bornes de la source d'énergie, afin de maintenir l'organe chauffant à la température de service, par exemple en faisant que la puissance dissipée par l'organe chauffant soit sensiblement constante.The duty cycle can be determined by the microcontroller according to the state of exhaustion of the source of autonomous electrical energy, the state of exhaustion of the autonomous power source being for example characterized by the voltage at its terminals. Thus, the duty cycle can for example increase to compensate for the decrease of the voltage across the power source, in order to maintain the heating member at the operating temperature, for example by making the power dissipated by the body heating is substantially constant.

L'invention n'exclut pas l'utilisation d'un capteur de température afin de réguler plus finement la température, par exemple.The invention does not exclude the use of a temperature sensor to regulate more finely the temperature, for example.

Le dispositif peut ne comporter qu'un seul organe chauffant, celui-ci ne comportant qu'un seul fil résistif par exemple, étant alimenté par deux conducteurs.The device may comprise only one heating member, the latter having only one resistive wire for example, being powered by two conductors.

Selon une variante de réalisation, le dispositif comporte deux organes chauffants qui peuvent être utilisés pour chauffer la même surface du dispositif servant à l'application du produit et le circuit de gestion de l'alimentation électrique est agencé pour alimenter l'un et/ou l'autre des organe(s) chauffant(s) en fonction par exemple de l'état d'épuisement de la source d'énergie électrique autonome.According to an alternative embodiment, the device comprises two heating members that can be used to heat the same surface of the device used for the application of the product and the power supply management circuit is arranged to feed the one and / or the other of the heating member (s) depending for example on the state of exhaustion of the source of autonomous electrical energy.

Par exemple, le circuit de gestion de l'alimentation électrique peut être agencé pour, selon un régime d'alimentation, alimenter simultanément les deux organes chauffants. Un tel régime d'alimentation correspond par exemple au cas où l'applicateur doit être amené rapidement à la température de service après sa mise en marche et où la puissance électrique à dissiper est maximale.For example, the power supply management circuit can be arranged for, according to a power regime, supply simultaneously the two heating members. Such a power regime corresponds for example to the case where the applicator must be brought quickly to the operating temperature after it is started and where the electrical power to be dissipated is maximum.

Le circuit de gestion de l'alimentation électrique peut être agencé pour, selon un autre régime d'alimentation, n'alimenter que l'un des deux organes chauffants. Le choix de l'organe chauffant qui est alimenté s'effectue par exemple en fonction de la puissance électrique qu'est capable de dissiper cet organe chauffant selon la tension de la source d'énergie. Ainsi, en fonction de l'état d'épuisement de celle-ci, l'un ou l'autre des organes chauffants pourra être alimenté, selon ses caractéristiques électriques propres.The power supply management circuit can be arranged for, according to another power regime, feeding only one of the two heating elements. The choice of the heating member that is powered is for example based on the electrical power that is able to dissipate the heating member according to the voltage of the energy source. Thus, depending on the state of exhaustion thereof, one or other of the heating organs can be powered, according to its own electrical characteristics.

Autrement dit, le circuit de gestion de l'alimentation électrique peut être agencé pour alimenter sélectivement l'un ou l'autre des organes chauffants, en fonction de l'état d'épuisement de la source notamment.In other words, the power supply management circuit can be arranged to selectively supply one or the other of the heating elements, depending on the state of exhaustion of the source in particular.

Dans le cas où l'état d'épuisement de la source est tel que l'énergie électrique qu'elle délivre ne permet plus à un seul organe chauffant de maintenir l'applicateur à une température de service suffisante, l'autre organe chauffant peut être alimenté lui aussi.In the case where the state of exhaustion of the source is such that the electrical energy it delivers no longer allows a single heating member to maintain the applicator at a sufficient operating temperature, the other heating member can to be fed too.

Les organes chauffants peuvent être montés dans des branches parallèles, chaque branche comportant en série l'organe chauffant et un organe électronique de commutation contrôlé par le circuit de gestion de l'alimentation électrique, par exemple par le microcontrôleur précité.The heating members may be mounted in parallel branches, each branch having in series the heating member and an electronic switching member controlled by the power supply management circuit, for example by the aforementioned microcontroller.

Les organes chauffants peuvent aussi être montés en série, le circuit de gestion de l'alimentation électrique comportant un système de commutation agencé pour alimenter tout ou seulement une partie des organes chauffants, selon l'état d'épuisement de la source d'énergie électrique autonome notamment.The heating members may also be mounted in series, the power supply management circuit comprising a switching system arranged to feed all or only a portion of the heating organs, depending on the state of exhaustion of the autonomous electrical energy source in particular.

Le circuit électrique du dispositif peut comporter un système de temporisation agencé pour limiter la durée d'au moins une phase de fonctionnement du dispositif et/ou d'au moins un régime d'alimentation, à une valeur prédéfinie. Cette durée peut être variable en fonction de l'état d'épuisement de la source d'énergie. Le dispositif est par exemple agencé pour mesurer la tension Vs de la source puis déterminer, par exemple par calcul ou accès à une table, la durée correspondante de la phase de fonctionnement et/ou du régime d'alimentation.The electrical circuit of the device may comprise a timing system arranged to limit the duration of at least one operating phase of the device and / or at least one power regime, to a predefined value. This duration can be variable depending on the state of exhaustion of the energy source. The device is for example arranged to measure the voltage V s of the source and then determine, for example by calculation or access to a table, the corresponding duration of the operating phase and / or the power regime.

Lorsque la phase de fonctionnement correspond à la mise à une température prédéfinie de l'organe chauffant, celui-ci peut être alimenté en continu à la tension de la source ou à une valeur supérieure lorsque le circuit le permet, pendant une durée prédéfinie avant qu'une régulation avec rapport cyclique variable ne débute. Cette régulation avec rapport cyclique variable peut comporter une mesure périodique de la tension Vs de la source afin de connaître son état d'épuisement et le rapport cyclique peut être modifié en conséquence, étant par exemple constant entre deux lectures consécutives de la tension de la source.When the operating phase corresponds to setting the heating element to a predetermined temperature, it can be fed continuously to the source voltage or to a higher value when the circuit permits, for a predefined duration before a regulation with variable duty cycle does not begin. This regulation with variable duty cycle can comprise a periodic measurement of the voltage V s of the source in order to know its state of exhaustion and the duty cycle can be modified accordingly, being for example constant between two consecutive readings of the voltage of the source.

L'applicateur peut comporter un indicateur sonore et/ou visuel pour signaler l'épuisement de la source d'énergie électrique autonome et/ou indiquer si la température de l'organe chauffant a atteint une valeur prédéfinie, notamment la température de service.The applicator may include an audible and / or visual indicator to indicate the exhaustion of the autonomous electrical energy source and / or indicate whether the temperature of the heating element has reached a predefined value, notably the operating temperature.

La tension Vsmax de la source d'énergie électrique autonome, à pleine capacité, peut être supérieure à la tension d'alimentation Vw de l'organe chauffant nécessaire pour le maintenir à sa température de service lorsque alimenté en continu, la tension Vsmax étant par exemple supérieure à 1,2 fois Vw.The voltage V smax of the autonomous electrical energy source, at full capacity, may be greater than the supply voltage V w of the heating element necessary to maintain it at its operating temperature when continuously supplied, the voltage V for example, smax being greater than 1.2 times V w .

Le circuit de gestion de l'alimentation électrique de l'organe chauffant peut être agencé pour mesurer la tension Vs de la source d'énergie électrique autonome à la mise en marche du dispositif et pour alimenter l'organe chauffant en continu pendant une durée prédéfinie T1, fonction de la tension ainsi mesurée, afin d'amener l'organe chauffant à la température de service ou à une température supérieure, pour le prélèvement du produit.The power supply management circuit of the heating element can be arranged to measure the voltage V s of the autonomous electrical energy source at the start of the device and to supply the heating element continuously for a period of time. predefined T 1 , depending on the voltage thus measured, in order to bring the heating member to the operating temperature or at a higher temperature, for sampling the product.

L'alimentation de l'organe chauffant peut s'effectuer avec un rapport cyclique et les régimes d'alimentation peuvent différer par les valeurs du rapport cyclique.The heating element can be fed with a duty cycle and the power regimes can differ by the values of the duty cycle.

L'invention a encore pour objet, selon un autre de ses aspects, un procédé de gestion de l'alimentation d'un organe électrique chauffant d'un dispositif d'application d'une composition, dans lequel

  • on alimente l'organe chauffant à une tension moyenne inférieure à celle délivrée par la source d'énergie électrique autonome et/ou avec un premier rapport cyclique inférieur à 1, lorsque la source d'énergie électrique autonome est à un premier degré d'épuisement et lorsque l'organe chauffant est à maintenir à sa température de service et,
  • on alimente l'organe chauffant avec un deuxième rapport cyclique supérieur au premier et/ou à une tension supérieure ou égale à celle de la source d'énergie électrique lorsque cette dernière est à un deuxième degré d'épuisement supérieur au premier et/ou lorsque l'organe chauffant doit être porté à sa température de service ou à une température supérieure.
Another subject of the invention, according to another of its aspects, is a method of managing the power supply of an electric heating element of a device for applying a composition, in which
  • the heating element is supplied at a lower average voltage than that delivered by the autonomous electric power source and / or with a first duty cycle of less than 1, when the autonomous electric energy source is at a first degree of exhaustion and when the heating member is to be maintained at its operating temperature and,
  • the heating member is fed with a second duty cycle greater than the first and / or a voltage greater than or equal to that of the source of electrical energy when the latter is at a second degree of exhaustion higher than the first and / or when the heating element must be brought to its operating temperature or to a higher temperature.

Le premier degré d'épuisement peut correspondre à la pleine capacité de la source.The first degree of exhaustion may correspond to the full capacity of the source.

L'invention pourra être mieux comprise à la lecture de la description détaillée qui va suivre, d'exemples de mise en oeuvre non limitatifs de celle-ci, et à l'examen du dessin annexé, sur lequel :

  • la figure 1 représente, de façon schématique et partielle, un dispositif d'application réalisé conformément à l'invention,
  • la figure 2 est une vue analogue à la figure 1 d'une variante de réalisation,
  • la figure 3 est un schéma électrique d'un exemple de circuit d'alimentation réalisé conformément à l'invention,
  • la figure 4 est une vue analogue à la figure 3 d'une variante de circuit,
  • la figure 5 est un schéma en blocs illustrant un procédé de gestion de l'alimentation électrique, conforme à un exemple de mise en oeuvre de l'invention,
  • la figure 6 représente un exemple d'allure de la tension d'alimentation de l'organe chauffant électrique,
  • la figure 7 est une vue analogue aux figures 3 et 4 d'une variante de circuit,
  • la figure 8 est une vue analogue à la figure 5 d'une variante de procédé,
  • la figure 9 est une vue analogue à la figure 2 d'une autre variante de circuit, et,
  • les figures 10 et 11 représentent des exemples de composants d'un circuit électrique selon l'invention.
The invention will be better understood on reading the following detailed description, non-limiting examples of implementation thereof, and on examining the appended drawing, in which:
  • the figure 1 represents, schematically and partially, an application device produced according to the invention,
  • the figure 2 is a view similar to the figure 1 an alternative embodiment,
  • the figure 3 is a circuit diagram of an example of a power supply circuit made according to the invention,
  • the figure 4 is a view similar to the figure 3 a circuit variant,
  • the figure 5 is a block diagram illustrating a method of managing the power supply, according to an exemplary implementation of the invention,
  • the figure 6 represents an example of the shape of the supply voltage of the electric heating element,
  • the figure 7 is a view similar to Figures 3 and 4 a circuit variant,
  • the figure 8 is a view similar to the figure 5 a process variant,
  • the figure 9 is a view similar to the figure 2 another circuit variant, and,
  • the Figures 10 and 11 represent examples of components of an electrical circuit according to the invention.

Le dispositif d'application 1 représenté à la figure 1 comporte un boîtier 2 logeant une source d'énergie électrique autonome 3 et un organe chauffant électrique 4, alimenté à partir de cette source d'énergie électrique autonome 3 par un circuit électrique 10 dont des exemples sont représentés sur les figures 2, 3, 7 et 9.The application device 1 shown in FIG. figure 1 comprises a housing 2 housing an autonomous electrical energy source 3 and an electric heating element 4, powered from this source of autonomous electrical energy 3 by an electric circuit 10, examples of which are shown in FIGS. figures 2 , 3 , 7 and 9 .

Le dispositif d'application 1 peut présenter différentes formes, le boîtier 2 étant de préférence allongé.The application device 1 may have different shapes, the housing 2 being preferably elongated.

L'organe chauffant 4 représenté à la figure 1 s'étend dans le prolongement de l'axe longitudinal du boîtier. En variante, l'organe chauffant 1 peut s'étendre généralement transversalement à cet axe longitudinal, comme illustré à la figure 2.The heating member 4 shown in FIG. figure 1 extends in the extension of the longitudinal axis of the housing. Alternatively, the heating member 1 may extend generally transversely to this longitudinal axis, as illustrated in FIG. figure 2 .

L'organe chauffant 4 peut comporter au moins une résistance électrique, par exemple un fil d'alliage nickel chrome. L'organe chauffant peut par exemple être tel que décrit dans l'une des demandes US 5 853 010 , US 2006/0005851 ou JP 2003-3100335 .The heating member 4 may comprise at least one electrical resistance, for example a nickel-chromium alloy wire. The heating member may for example be as described in one of the applications US 5,853,010 , US 2006/0005851 or JP 2003-3100335 .

La source d'énergie électrique autonome 3 peut comporter une ou plusieurs piles de 1,5 V, par exemple de format AAA ou AA, ou un ou plusieurs accumulateurs, par exemple de type NiMH ou lithium polymère.The autonomous power source 3 may comprise one or more 1.5 V batteries, for example of AAA or AA format, or one or more accumulators, for example of the NiMH or lithium polymer type.

L'organe chauffant 4 peut être porté par un support qui est par exemple moulé en matière plastique d'une seule pièce avec au moins une partie du boîtier 2. Ce support peut ne porter que l'organe électrique chauffant 4 et aucun capteur de température permettant de mesurer la température de l'organe chauffant.The heating member 4 may be carried by a support which is for example molded of plastic material in one piece with at least a portion of the housing 2. This support may bear only the electric heating member 4 and no temperature sensor for measuring the temperature of the heating member.

Le support peut comporter, le cas échéant, des reliefs tels que des dents, destinées à peigner les cils et/ou au moins un relief de protection visant à protéger l'utilisateur en cas de contact accidentel avec l'organe chauffant 4, par exemple des nervures transversales recouvrant l'organe chauffant.The support may comprise, if necessary, reliefs such as teeth, intended to comb the eyelashes and / or at least one protective relief intended to protect the user in case of accidental contact with the heating member 4, for example transverse ribs covering the heating member.

Le dispositif 1 peut éventuellement comporter un capot de protection 8 venant recouvrir l'organe électrique chauffant 4 en l'absence d'utilisation.The device 1 may optionally comprise a protective cover 8 from covering the electric heating member 4 in the absence of use.

Le boîtier 2 peut comporter un interrupteur 12 de marche/arrêt ainsi éventuellement qu'un ou plusieurs indicateurs lumineux non représentés, par exemple pour signaler à l'utilisateur que l'alimentation électrique de l'organe chauffant est en cours ou le besoin de changer la source d'énergie électrique autonome, entre autres.The housing 2 may comprise a switch 12 on / off and possibly one or more light indicators not shown, for example to signal to the user that the power supply of the heating member is in progress or the need to change the autonomous power source, among others.

Dans le cas où la source d'énergie électrique autonome 3 comporte un ou plusieurs accumulateurs, le dispositif peut éventuellement être associé à une station de recharge permettant de recharger le ou les accumulateurs.In the case where the autonomous power source 3 comprises one or more accumulators, the device may optionally be associated with a charging station for charging the accumulator (s).

Le dispositif comporte un circuit électrique 10 alimentant l'organe chauffant 4 à partir de la source 3, que l'on a représenté schématiquement à la figure 3, comportant des moyens 11 de gestion de l'alimentation électrique de l'organe chauffant 4.The device comprises an electrical circuit 10 supplying the heating element 4 from the source 3, which is shown diagrammatically in FIG. figure 3 , comprising means 11 for managing the power supply of the heating member 4.

Ces moyens 11 comportent par exemple un microcontrôleur programmé pour remplir tout ou partie des fonctions recherchées.These means 11 comprise for example a microcontroller programmed to fulfill all or part of the desired functions.

Le circuit 10 peut comporter une temporisation qui maintient l'alimentation de l'organe électrique chauffant 4 pendant une certaine durée après que l'applicateur a été mis en marche par l'utilisateur.The circuit 10 may include a delay which maintains the power supply of the electric heating element 4 for a certain period of time after the applicator has been started by the user.

Les moyens de gestion 11 sont par exemple alimentés lorsque l'interrupteur 12 est fermé, et l'alimentation de l'organe chauffant peut alors se faire avec un régime d'alimentation variable, selon par exemple que l'organe chauffant est utilisé pour appliquer du produit ou parfaire un maquillage ou doit être rapidement amené à température.The management means 11 are for example supplied when the switch 12 is closed, and the supply of the heating member can then be done with a variable power regime, according to for example that the heating member is used to apply of the product or perfect a make-up or must be quickly brought to temperature.

L'organe chauffant 4 est par exemple agencé pour être alimenté sous une tension d'utilisation nominale Vw pendant son utilisation pour appliquer du produit ou parfaire un maquillage, l'alimentation à cette tension assurant le maintien de l'organe chauffant à une température de service comprise par exemple entre 60 et 70°C. La tension de la source électrique autonome Vsmax, à pleine capacité, est supérieure à Vw. Vw vaut par exemple 2V et Vsmax vaut par exemple 3,2 V. L'alimentation de l'organe chauffant a lieu à Vsmax par exemple pour amener rapidement l'organe chauffant à température.The heating member 4 is, for example, arranged to be supplied with a nominal operating voltage V w during its use to apply the product or to complete a makeup, the supply at this voltage ensuring the maintenance of the heating member at a temperature for example, between 60 and 70 ° C. The voltage of the autonomous power source V smax , at full capacity, is greater than V w . V w is for example 2V and V smax is for example 3.2 V. The supply of the heating member takes place at V smax for example to quickly bring the heating member to temperature.

L'alimentation à une tension Vw inférieure à la tension Vs de la source est par exemple obtenue grâce à une alimentation à découpage, réalisée par exemple à partir du composant commercialisé sous la référence LT 1173 par la société LINEAR TECHNOLOGY selon le schéma de la figure 10. Dans l'exemple de cette figure, la source d'énergie électrique autonome 3 comporte deux piles de 1,5 V et les valeurs de L1, R1, R2 et C2 sont choisies respectivement égales à 220 µH, 100 kΩ et 220 µF et Vw vaut 2V.The power supply at a voltage V w less than the voltage V s of the source is for example obtained by means of a switched-mode power supply, produced for example from the component marketed under the reference LT 1173 by the company LINEAR TECHNOLOGY according to the the figure 10 . In the example of this figure, the autonomous power source 3 comprises two 1.5 V batteries and the values of L1, R1, R2 and C2 are chosen respectively equal to 220 μH, 100 kΩ and 220 μF and V w is 2V.

Le circuit 10 peut encore être agencé pour mesurer la tension Vs aux bornes de la source électrique autonome, la comparer à la tension d'utilisation nominale Vw de l'organe chauffant et, en fonction du résultat de la comparaison, agir sur le régime d'alimentation de l'organe électrique chauffant.The circuit 10 can be further arranged to measure the voltage V s across the autonomous power source, compare it with the nominal operating voltage V w of the heating member and, depending on the result of the comparison, act on the power regime of the electric heating element.

Les moyens de gestion 11 sont par exemple agencés pour, lorsque la tension délivrée par la source 3 est supérieure à Vw, alimenter l'organe chauffant 4 selon un rapport cyclique inférieur à 100 %, d'autant plus bas que la différence |Vs-Ww| est élevée.The management means 11 are, for example, arranged for, when the voltage delivered by the source 3 is greater than V w , supplying the heating member 4 with a duty ratio of less than 100%, all the more low as the difference | V s -W w | is high.

Lorsque la tension délivrée par la source 3 est égale ou inférieure à Vw car celle-ci est épuisée, le circuit 10 est agencé pour délivrer à l'organe chauffant 4 en continu une tension sensiblement égale à Vw.When the voltage delivered by the source 3 is equal to or less than V w because it is exhausted, the circuit 10 is arranged to deliver to the heating member 4 continuously a voltage substantially equal to V w .

Une alimentation à découpage fonctionnant en élévateur peut à cet effet être utilisée.A switching power supply operating as an elevator can be used for this purpose.

L'utilisation d'une telle alimentation à découpage permet ainsi d'exploiter la source 3 jusqu'à un niveau de décharge profond.The use of such a switching power supply thus makes it possible to exploit the source 3 up to a deep discharge level.

Dans une autre variante, le circuit 10 ne permet pas d'élever la tension de la source 3.In another variant, the circuit 10 does not make it possible to raise the voltage of the source 3.

On a représenté à la figure 4 un autre exemple de circuit 10 selon l'invention dans lequel l'organe chauffant 4 est monté en série avec un organe de commutation électronique 13, par exemple un transistor MOSFET.We have shown figure 4 another example circuit 10 according to the invention wherein the heating member 4 is connected in series with an electronic switching member 13, for example a MOSFET transistor.

Dans cet exemple, les moyens de gestion 11 de l'alimentation électrique sont alimentés en permanence par la source 3 mais peuvent passer d'un état de veille, dans lequel leur consommation électrique est très réduite, à un état actif où une certaine régulation de la température de l'organe chauffant est assurée.In this example, the management means 11 of the power supply are continuously supplied by the source 3 but can go from a standby state, in which their power consumption is very low, to an active state where a certain regulation of the temperature of the heating member is ensured.

Comme on peut le voir à la figure 4, l'interrupteur 12 peut dans ce cas être à contact fugitif et associé aux moyens de gestion 11. Le cas échéant, un interrupteur supplémentaire coupant l'alimentation générale, non représenté, peut être prévu.As can be seen at figure 4 the switch 12 can in this case be in fugitive contact and associated with the management means 11. If necessary, an additional switch cutting the general power supply, not shown, can be provided.

Les moyens de gestion circuit 11 comportent dans l'exemple décrit un microcontrôleur agencé pour, après détection d'un changement d'état de l'interrupteur 12, passer de l'état de veille à l'état actif.The circuit management means 11 comprise in the example described a microcontroller arranged to, after detection of a change of state of the switch 12, to go from the standby state to the active state.

Le microcontrôleur peut être agencé pour, dans l'état actif, réguler la température de l'organe chauffant en agissant sur l'organe de commutation électronique 13.The microcontroller can be arranged to, in the active state, regulate the temperature of the heating element by acting on the electronic switching member 13.

Selon un premier exemple de mise en oeuvre du dispositif représenté à la figure 4, l'alimentation de l'organe chauffant 4 s'effectue selon un régime variable en fonction de l'état d'épuisement de la source d'énergie électrique autonome.According to a first example of implementation of the device shown in FIG. figure 4 , the power supply of the heating member 4 is effected according to a variable regime depending on the state of exhaustion of the autonomous power source.

Les moyens de gestion 11 peuvent être agencés pour découper la tension Vs de telle sorte que la valeur moyenne de la tension aux bornes de l'organe électrique chauffant 4 corresponde sensiblement à Vw, lorsque Vs est supérieure à Vw.The management means 11 can be arranged to cut the voltage V s so that the average value of the voltage across the electric heating member 4 substantially corresponds to V w , when V s is greater than V w .

Les moyens de gestion 11 peuvent notamment agir sur le rapport cyclique de l'alimentation de l'organe électrique chauffant en commandant en ouverture ou en fermeture l'organe de commutation électronique 13, le rapport cyclique étant défini comme étant la valeur τ/T comme illustré à la figure 6. La tension peut par exemple être découpée à une fréquence 1/T comprise entre 1 Hz et 100 kHz, par exemple 1kHz.The management means 11 can in particular act on the duty cycle of the supply of the electric heating element by controlling the opening or closing of the electronic switching member 13, the duty ratio being defined as the value τ / T as illustrated at figure 6 . The voltage may for example be cut at a frequency 1 / T between 1 Hz and 100 kHz, for example 1kHz.

Dans le cas où la source d'énergie électrique autonome 3 présente par exemple une tension Vsmax de 3V à pleine capacité et que la tension nominale Vw est de 2V, le rapport cyclique est par exemple de 67 % au début, puis augmente au fur et à mesure que la tension Vs aux bornes de la source 3 décroît. Lorsque l'organe chauffant est alimenté en continu à 2V, sa température reste comprise entre 60 et 70°C, par exemple.In the case where the autonomous power source 3 has for example a voltage V smax of 3V at full capacity and the nominal voltage V w is 2V, the duty cycle is for example 67% at the beginning, then increases to as the voltage V s across the source 3 decreases. When the heating element is fed continuously at 2V, its temperature remains between 60 and 70 ° C, for example.

Dans le cas où la source d'énergie électrique autonome 3 s'est déchargée et que la tension Vs est pratiquement voisine de Vw ou lui est inférieure, le rapport cyclique est sensiblement égal à 100%.In the case where the autonomous power source 3 has discharged and the voltage V s is substantially close to or less than V w , the duty cycle is substantially equal to 100%.

Le microcontrôleur peut stocker une table de correspondance entre la tension Vs et le rapport cyclique à appliquer à la tension d'alimentation de l'organe chauffant 4. Cette table est adaptée à un organe chauffant de tension d'utilisation Vw prédéfinie.The microcontroller can store a table of correspondence between the voltage V s and the duty cycle to be applied to the supply voltage of the heating member 4. This table is adapted to a heating element of use voltage V w predefined.

Lorsque la tension Vs devient inférieure à Vw, les moyens de gestion 11 peuvent être agencés pour le signaler à l'utilisateur, par exemple par un signal visuel ou sonore.When the voltage V s becomes less than V w , the management means 11 may be arranged to signal it to the user, for example by a visual or audible signal.

Selon un autre exemple de mise en oeuvre du dispositif représenté à la figure 4, l'alimentation de l'organe chauffant 4 s'effectue selon des régimes différents en fonction de l'état d'épuisement de la source d'énergie électrique autonome et/ou de la phase de fonctionnement de l'applicateur, à savoir d'une part la mise à température de service ou à une température supérieure de l'organe électrique chauffant, ou d'autre part le maintien de celui-ci à la température de service.According to another example of implementation of the device shown in FIG. figure 4 , the power supply of the heating member 4 is carried out according to different regimes depending on the state of exhaustion of the autonomous electrical energy source and / or the operating phase of the applicator, namely on the one hand the service temperature setting or a higher temperature of the electric heating element, or on the other hand the maintenance thereof at the operating temperature.

Cet exemple de mise en oeuvre va être décrit en référence à la figure 5.This example of implementation will be described with reference to the figure 5 .

Lorsqu'un utilisateur appuie sur l'interrupteur 12 à l'étape 100, le microcontrôleur détecte cette action à l'étape 101 et alimente l'organe chauffant 4 selon un premier régime d'alimentation, correspondant à une phase de mise à température.When a user presses the switch 12 in step 100, the microcontroller detects this action in step 101 and supplies the heating member 4 in a first power regime, corresponding to a heat-up phase.

Ce premier régime d'alimentation peut permettre d'élever rapidement la température de l'organe chauffant à partir de la température ambiante, lorsque le dispositif d'application est mis en marche afin d'être utilisé. Durant cette phase, l'organe chauffant peut être suralimenté, c'est-à-dire que la puissance électrique qu'il dissipe est supérieure à celle correspondant à son maintien à la température de service. L'organe chauffant est par exemple alimenté à une tension supérieure à Vs. Une alimentation à découpage telle que représentée à la figure 11 est par exemple utilisée pour élever la tension fournie à l'organe chauffant. Dans l'exemple de la figure 11 la source d'énergie électrique autonome 3 comporte deux piles de 1,5 V et les valeurs de L et C sont respectivement choisies égales à 100 µH et à 100 µF de telle sorte que la tension fournie en sortie soit égale à 5V pour une tension d'entrée de 3V.This first feed regime can rapidly raise the temperature of the heater from room temperature when the application device is turned on for use. During this phase, the heating element can be supercharged, that is to say that the electrical power it dissipates is greater than that corresponding to its maintenance at the operating temperature. The heating member is for example supplied at a voltage greater than V s . A switching power supply as shown in FIG. figure 11 is for example used to raise the voltage supplied to the heating member. In the example of the figure 11 the autonomous power source 3 comprises two 1.5 V batteries and the L and C values are respectively chosen equal to 100 μH and 100 μF so that the voltage supplied at the output is equal to 5V for a voltage 3V input.

A l'étape 102, les moyens de gestion 11 de l'alimentation électrique mesurent par exemple la tension Vs et agissent sur l'organe de commutation 13 pour alimenter temporairement l'organe chauffant 4 pendant une durée prédéfinie, selon un rapport cyclique égal à 100% environ.In step 102, the power supply management means 11 for example measure the voltage V s and act on the switching member 13 to temporarily supply the heating member 4 for a predefined period of time, according to an equal duty cycle. at about 100%.

L'organe chauffant peut comme indiqué ci-dessus, selon ce premier régime d'alimentation, être alimenté avec une tension supérieure à sa tension d'utilisation Vw, ce qui peut permettre de réduire le temps de chauffe.The heating member can, as indicated above, according to this first power regime, be supplied with a voltage greater than its operating voltage V w , which can reduce the heating time.

Toujours à l'étape 102, les moyens de gestion 11 de l'alimentation déterminent la durée T1 pendant laquelle l'organe chauffant 4 doit être alimenté selon le premier régime d'alimentation.Still at step 102, the power management means 11 determine the duration T 1 during which the heating member 4 must be powered according to the first power regime.

Le microcontrôleur stocke par exemple une table de correspondance entre la tension Vs mesurée initialement et la durée T1.The microcontroller for example stores a correspondence table between the voltage V s initially measured and the duration T 1 .

A titre d'exemple, lorsque la valeur initiale de Vs est respectivement de 3V, 2,5V et 2V, la durée T1 peut respectivement être égale à 20s, 30s et 40s. Autrement dit, la durée de la phase d'alimentation de l'organe chauffant à puissance élevée peut être d'autant plus faible que le degré d'épuisement de la source 3 est faible.For example, when the initial value of V s is 3V, 2.5V and 2V respectively, the duration T 1 can respectively be equal to 20s, 30s and 40s. In other words, the duration of the power supply phase of the high-power heating element can be even lower as the degree of exhaustion of the source 3 is low.

L'organe chauffant 4 est alimenté pendant la durée T1 au cours de l'étape 103.The heating member 4 is fed during the duration T 1 during step 103.

Ensuite, à l'étape 104, la tension Vs de la source d'énergie électrique autonome 3 est à nouveau mesurée par les moyens de gestion 11 de l'alimentation qui peuvent alors alimenter l'organe chauffant selon au moins un deuxième régime d'alimentation, correspondant par exemple à une phase de fonctionnement où l'organe chauffant est à la température de service et doit être maintenu à cette température, ce qui suppose une alimentation électrique de l'organe chauffant à une puissance inférieure à celle du premier régime d'alimentation.Then, in step 104, the voltage V s of the autonomous electrical power source 3 is again measured by the power management means 11 which can then feed the heating member according to at least a second power supply. supply, corresponding for example to an operating phase where the heating member is at the operating temperature and must be maintained at this temperature, which assumes a power supply of the heating member at a lower power than that of the first regime power.

Les moyens de gestion 11 peuvent par exemple déterminer le rapport cyclique de l'alimentation en fonction de la tension mesurée à l'étape 104. Ce rapport cyclique est par exemple prédéfini par une table de correspondance stockée dans le microcontrôleur, ayant pour entrée par exemple la tension Vs. En variante, le rapport cyclique est déterminé par le microcontrôleur selon une fonction mathématique ayant pour variable Vs.The management means 11 may, for example, determine the duty cycle as a function of the voltage measured in step 104. This duty cycle is, for example, predefined by a correspondence table stored in the microcontroller, having for input for example the voltage V s . In a variant, the duty cycle is determined by the microcontroller according to a mathematical function whose variable is V s .

L'organe chauffant peut être alimenté à l'étape 105 avec un rapport cyclique déterminé pendant une durée T2, à l'issue de laquelle les moyens de gestion 11 détectent à l'étape 106 si l'interrupteur 12 est toujours actionné, auquel cas le fonctionnement selon les étapes 104 et 105 est poursuivi et, dans la négative, le dispositif retourne au mode veille de l'étape 100.The heating member can be fed at step 105 with a determined duty cycle for a duration T 2 , after which the management means 11 detect in step 106 whether the switch 12 is still actuated, to which case the operation according to steps 104 and 105 is continued and, if not, the device returns to the standby mode of step 100.

Comme représenté à la figure 7, le dispositif peut comporter deux organes chauffants 4 et 4' pouvant par exemple être alimentés indépendamment l'un de l'autre. Les deux organes chauffants sont, par exemple, disposés sur le support du dispositif d'application d'un même côté de celui-ci, étant par exemple superposés, imbriqués ou juxtaposés.As represented in figure 7 , the device may comprise two heating members 4 and 4 'may for example be powered independently of one another. The two heating members are, for example, arranged on the support of the application device on the same side thereof, for example being superposed, nested or juxtaposed.

Les organes chauffants 4 et 4' présentent par exemple des tensions nominales d'utilisation Vw et Vw différentes.For example, the heating elements 4 and 4 'have different nominal operating voltages V w and V w .

L'organe chauffant 4 a par exemple une tension nominale d'utilisation Vw supérieure à une tension de seuil Vseuil prédéfinie et l'organe chauffant 4' a par exemple une tension nominale d'utilisation Vw inférieure à la tension de seuil Vseuil. La valeur de cette tension de seuil peut être enregistrée dans le microcontrôleur. Vseuil vaut par exemple environ 0,8 Vsmax.The heating member 4 has for example a nominal operating voltage V w greater than a threshold threshold voltage V predefined and the heating member 4 'has for example a nominal operating voltage V w less than the threshold voltage V threshold . The value of this threshold voltage can be recorded in the microcontroller. V threshold is for example about 0.8 V smax .

Les moyens de gestion 11 de l'alimentation sont agencés pour mesurer la tension Vs de la source d'énergie électrique autonome et pour sélectionner le ou les organes chauffants à alimenter en fonction de la tension Vs et/ou de la phase de fonctionnement, à savoir la mise à température de l'organe électrique chauffant ou le maintien de celui-ci à la température d'utilisation.The power management means 11 are arranged to measure the voltage V s of the autonomous electrical energy source and to select the heating element or members to be powered according to the voltage V s and / or the phase of the operation, namely the heating of the electric heating element or maintaining it at the temperature of use.

Le dispositif correspondant au schéma de la figure 7 peut fonctionner selon au moins trois régimes d'alimentation, comme illustré à la figure 8.The device corresponding to the diagram of the figure 7 can operate in at least three feeding regimes, as illustrated in figure 8 .

Les étapes 100 et 101 sont analogues à celles décrites en référence à la figure 5.Steps 100 and 101 are similar to those described with reference to the figure 5 .

A l'étape 202, les moyens de gestion 11 de l'alimentation commandent l'alimentation simultanée des deux organes chauffants en agissant sur les organes de commutation 13 et 13' associés et mesurent la tension Vs aux bornes de la source 3.In step 202, the power management means 11 control the simultaneous supply of the two heating members by acting on the switching members 13 and 13 'associated and measure the voltage V s at the terminals of the source 3.

Similairement à ce qui à été décrit à l'étape 102 de la figure 5, les moyens de gestion 11 peuvent à cette étape 202 déterminer la durée T1 du premier régime d'alimentation en fonction d'une table de correspondance entre la tension Vs initiale et la durée T1 stockée dans le microcontrôleur.Similar to what was described in step 102 of the figure 5 , the management means 11 can at this step 202 determine the duration T 1 of the first power regime as a function of a table of correspondence between the initial voltage V s and the duration T 1 stored in the microcontroller.

Cette durée T1, correspond par exemple au temps permettant à l'applicateur d'atteindre la température recherchée, et pourra ainsi être plus courte lorsque la source d'énergie autonome est complètement chargée et plus longue après épuisement partiel de celle-ci.This duration T 1 , corresponds for example to the time allowing the applicator to reach the desired temperature, and can thus be shorter when the autonomous energy source is fully charged and longer after partial exhaustion thereof.

Dans cette première phase, les organes chauffants 4 et 4' sont par exemple alimentés simultanément.In this first phase, the heating members 4 and 4 'are for example fed simultaneously.

A l'étape 203, après cette phase de mise à température de l'applicateur, la tension Vs aux bornes de la source d'énergie électrique autonome est à nouveau mesurée.In step 203, after this phase of warming up the applicator, the voltage V s at the terminals of the autonomous power source is again measured.

A l'étape 204, les moyens de gestion 11 déterminent, selon la valeur mesurée et la tension nominale d'utilisation de chacun des organes chauffants 4 et 4', lequel des organes chauffants 4 ou 4' doit être alimenté.In step 204, the management means 11 determine, according to the measured value and the nominal operating voltage of each of the heating members 4 and 4 ', which of the heating members 4 or 4' must be powered.

Par exemple, si la tension Vs est supérieure à la tension de seuil, l'organe chauffant 4 est alimenté selon un deuxième régime d'alimentation à l'étape 205 et si la tension Vs est inférieure à cette tension de seuil, l'organe chauffant 4' est alimenté selon un troisième régime d'alimentation, à l'étape 205.For example, if the voltage V s is greater than the threshold voltage, the heating element 4 is supplied with a second supply regime at step 205 and if the voltage V s is below this threshold voltage, the heating member 4 'is fed with a third feed regime at step 205.

L'alimentation des organes chauffants à l'étape 205 peut se faire de manière continue ou selon un rapport cyclique prédéfini qui dépend de la tension Vs dans une varianteThe supply of the heating elements in step 205 can be done continuously or in a predefined duty cycle which depends on the voltage V s in a variant

L'étape 205 s'effectue pendant une durée T2 prédéfinie.Step 205 is performed for a predefined duration T 2 .

L'étape 106 est similaire à celle décrite en référence à la figure 5.Step 106 is similar to that described with reference to figure 5 .

Dans la variante de la figure 9, les deux organes chauffants 4 et 4' sont montés électriquement en série et peuvent être reliés ou non à un point milieu, lequel permet par exemple de n'alimenter que l'un des organes chauffants en court-circuitant l'autre.In the variant of the figure 9 , the two heating members 4 and 4 'are electrically connected in series and may or may not be connected to a midpoint, which allows for example to feed only one of the heating organs by shorting the other.

L'invention n'est pas limitée aux exemples qui viennent d'être décrits.The invention is not limited to the examples which have just been described.

Le dispositif d'application peut comporter plus de deux organes chauffants.The application device may comprise more than two heating members.

Lorsque le dispositif comporte plus d'un organe chauffant, le boîtier peut comporter un interrupteur de mise en marche par organe chauffant.When the device comprises more than one heating member, the housing may comprise a switch for switching on by heating element.

Les moyens de gestion de l'alimentation électrique de l'organe chauffant peuvent ne pas comporter de microcontrôleur, ce dernier étant par exemple remplacé par un circuit analogique dédié.The means for managing the power supply of the heating member may not include a microcontroller, the latter being for example replaced by a dedicated analog circuit.

Dans une variante de mise en oeuvre de l'invention, l'intensité parcourant l'organe chauffant peut être mesurée afin de détecter un épuisement de la source et le rapport cyclique peut par exemple être augmenté et/ou la tension d'alimentation élevée afin de maintenir le courant à une valeur prédéfinie.In an alternative embodiment of the invention, the intensity traversing the heating element can be measured in order to detect exhaustion of the source and the duty cycle can for example be increased and / or the high supply voltage so that to maintain the current at a preset value.

On peut combiner entre elles les particularités de réalisation des exemples illustrés au sein de variantes non illustrées.The particularities of embodiment of the illustrated examples can be combined with non-illustrated variants.

L'expression « comportant un » doit être comprise comme étant synonyme de « comportant au moins un ».The phrase "with one" should be understood as being synonymous with "having at least one".

Claims (15)

  1. A device for applying a composition, the device comprising:
    • an independent electrical energy source (3);
    • at least one heater member (4) that is powered by the independent electrical energy source (3); and
    • a circuit (10) for controlling the power supply to the heater member, the circuit being configured to power the heater member (4) at least two settings that differ at least as a function of the depletion state of the independent electrical energy source.
  2. A device according to claim 1, the circuit (10) for controlling the power supply to the heater member (4) being configured to use a "low-power" setting to transfer to the heater member only a fraction of the electric power that can be supplied thereto by the source (3).
  3. A device according to claim 2, the low-power setting corresponding to when the independent electrical energy source (3) is at full capacity, and to when the heater member should be maintained at a service temperature.
  4. A device according to any preceding claim, the circuit for controlling the power supply being configured to use a "full-power" setting to power the heater member with all of the electric power that can be supplied by the source, the full-power setting corresponding to when the heater member is brought from ambient temperature to its service temperature, or to when the remaining capacity of the independent electrical energy source is less than half its full capacity.
  5. A device according to any preceding claim, the circuit for controlling the power supply including a chopper power supply.
  6. A device according to the preceding claim, the chopper power supply being configured to function in step-down mode at one of the power setting in order to power the heater member at a mean voltage that is less than the voltage of the independent electrical energy source and in step-up mode, at another power setting in order to power the heater member at a mean voltage that is greater than the voltage of the independent electrical energy source.
  7. A device according to any one of claims 1 to 6, the circuit (10) for controlling the power supply being configured to power the heater member (4) in continuous manner at one of the power setting, and cyclically with a duty ratio at another of the power setting.
  8. A device according to claim 7, the duty ratio being determined by the depletion state of the independent electrical energy source (3).
  9. A device according to any one of claims 1 to 8, the circuit for controlling the power supply to the heater member being configured to select the power setting of the heater member (4) as a function of the depletion state of the independent electrical energy source (4) and as a function of the operating stage, the operating stage being selected from: maintaining the heater member at the service temperature; and heating the heater member up from ambient temperature to a service temperature or to a higher temperature.
  10. A device according to any one of claims 1 to 9, including two heater members (4, 4'), and the circuit for controlling the power supply being configured to power the heater member(s) (4, 4') as a function of the depletion state of the independent electrical energy source (3).
  11. A device according to any preceding claim, the circuit for controlling the power supply including a timer system that is configured to limit at least one power setting to a predefined duration.
  12. A device according to any preceding claim, the voltage Vsmax of the independent electrical energy source, at full capacity, being greater than the heater-member voltage Vw that is necessary for maintaining the heater member (4) at its service temperature when powered continuously.
  13. A device according to any one of claims 1 to 12, the circuit (10) being arranged to measure the voltage Vs of the independent electrical energy source (3) on switching on the device, and to power the heater member (4) continuously for a predefined duration (T1) as a function of the voltage thus measured in order to bring the heater member (4) to its service temperature or to a higher temperature, so as to take up the composition.
  14. A device according to claim 1, the heater member (4) being powered with a variable duty ratio, and the power settings differing in their duty ratios.
  15. A method of controlling the power supply to an electrical heater element of a device for applying a cosmetic composition, the method being characterized in that :
    · the heater member is powered at a voltage that is less than the voltage supplied by the independent electrical energy source (3) and/or with a first duty ratio that is less than unity when the independent electrical energy source (3) is at a first degree of depletion and when the heater member (4) is to be maintained at its service temperature; and
    · the heater member (4) is powered with a second duty ratio that is greater than the first and/or at a voltage that is greater than or equal to the voltage of the independent electrical energy source (3) when said independent electrical energy source is at a second degree of depletion that is greater than the first and/or when the heater member (4) is to be brought to its service temperature or to a higher temperature.
EP08171359A 2007-12-20 2008-12-11 Device for applying a cosmetic composition comprising a heating element Not-in-force EP2074905B1 (en)

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FR0760159A FR2925267B1 (en) 2007-12-20 2007-12-20 DEVICE FOR APPLYING A COSMETIC COMPOSITION COMPRISING A HEATING ORGAN.

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EP2074905B1 true EP2074905B1 (en) 2012-03-07

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AT (1) ATE547963T1 (en)
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US20050220828A1 (en) 2003-10-31 2005-10-06 The Procter & Gamble Company Treatment of keratinous tissue
US7084379B2 (en) * 2004-03-22 2006-08-01 Ngk Spark Plug Co., Ltd. Control apparatus for gas sensor
US7322366B2 (en) * 2004-07-06 2008-01-29 Yong Hoon Cho Heated eyelash curler
US7465114B2 (en) 2004-08-11 2008-12-16 Elc Management Llc Vibrating mascara applicator, suitable compositions and method of use
US7608805B2 (en) * 2005-01-14 2009-10-27 Hakko Corporation Control system for battery powered heating device
JP5019814B2 (en) * 2005-10-14 2012-09-05 株式会社リコー Image forming apparatus and power control method
KR100846443B1 (en) 2006-03-31 2008-07-16 김태연 Heating Mascara
US7753609B2 (en) * 2006-06-07 2010-07-13 Elc Management Llc Cosmetic applicators containing heating elements
US7448814B2 (en) 2006-06-07 2008-11-11 Elc Management Llc Cosmetic dispensing devices containing heating elements
US20080235853A1 (en) * 2007-03-30 2008-10-02 Kevin James Sousa Heated Earmuff With Improved Frame and Heating Element
FR2925268B1 (en) * 2007-12-20 2010-11-05 Oreal DEVICE FOR COLLECTING AND APPLYING A COSMETIC PRODUCT.

Also Published As

Publication number Publication date
ES2381887T3 (en) 2012-06-01
EP2074905A1 (en) 2009-07-01
FR2925267A1 (en) 2009-06-26
US20090159583A1 (en) 2009-06-25
ATE547963T1 (en) 2012-03-15
US8698042B2 (en) 2014-04-15
FR2925267B1 (en) 2010-01-08

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