WO2022176619A1 - Rasoir électrique - Google Patents

Rasoir électrique Download PDF

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Publication number
WO2022176619A1
WO2022176619A1 PCT/JP2022/003983 JP2022003983W WO2022176619A1 WO 2022176619 A1 WO2022176619 A1 WO 2022176619A1 JP 2022003983 W JP2022003983 W JP 2022003983W WO 2022176619 A1 WO2022176619 A1 WO 2022176619A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaving
imaging device
image
imaging
light
Prior art date
Application number
PCT/JP2022/003983
Other languages
English (en)
Japanese (ja)
Inventor
芳彰 金森
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to EP22755940.8A priority Critical patent/EP4296024A4/fr
Priority to CN202280014152.XA priority patent/CN116829317A/zh
Publication of WO2022176619A1 publication Critical patent/WO2022176619A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/46—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards providing for illuminating the area to be shaved or clipped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/3873—Electric features; Charging; Computing devices
    • B26B19/388—Sensors; Control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
    • B26B19/48—Accessory implements for carrying out a function other than cutting hair, e.g. attachable appliances for manicuring

Definitions

  • the present disclosure relates to an electric razor for cutting body hair such as beard.
  • an imaging device records an image of a user's body part, a local hair growth direction is determined based on the captured image, and a shaving device is moved on the body according to the determined hair growth direction.
  • a shaving guidance system has been proposed that instructs the user in which direction to shave and where to shave (see, for example, Japanese Laid-Open Patent Application Publication No. 2002-100001).
  • the present disclosure has been made in view of the above problems, and aims to provide an electric shaver that can detect the properties of even body hair that has little color tone difference with the skin.
  • an electric shaver includes a grip portion gripped by a user; a head portion having a shaving portion for cutting body hair and connected to one end of the grip portion;
  • An electric shaver comprising: an imaging device for imaging the vicinity of the skin with which the shaving portion abuts; an illumination device capable of irradiating a region imaged by the imaging device with light of different spectrum; and an image processing device that processes an image obtained from an imaging device, wherein the image processing device controls the lighting device and the imaging device so as to individually irradiate light of different spectrums to capture an image. and a property information generating unit that generates property information indicating properties of the body hair based on the image captured by the imaging device.
  • the electric shaver of the present disclosure by individually irradiating light with different spectra, the skin and body hair can be effectively separated, and the properties of the body hair can be detected with high accuracy.
  • FIG. 1 is a perspective view showing an electric shaver according to an embodiment.
  • FIG. 2 is a perspective view showing the head portion of the electric shaver according to the embodiment.
  • FIG. 3 is a graph showing the relationship between the wavelength of light applied to the skin and the reflectivity.
  • FIG. 4 is a block diagram showing functional units of the electric shaver image processing apparatus according to the embodiment.
  • FIG. 5 is a block diagram showing functional units according to another example of the image processing apparatus for an electric shaver according to the embodiment.
  • FIG. 1 is a perspective view showing an electric shaver 100 according to an embodiment.
  • FIG. 2 is a perspective view showing the head portion 120 of the electric shaver 100. As shown in FIG. In the electric shaver 100, the edges are chamfered, and there are portions provided with anti-slip unevenness, but these are omitted from the drawing.
  • the electric shaver 100 is a device that uses an electric blade to cut and remove body hair such as a beard. (not shown in FIG. 1. See FIGS. 4 and 5).
  • the electric shaver 100 is equipped with a notification device 140 .
  • the grip part 110 is the part that the user grips when using the electric shaver 100 .
  • grip unit 110 functions as a housing that accommodates image processing device 150, a control device that controls driving of shaving blades, a battery, and the like.
  • a power switch 111 for turning on/off the power, an input button 112 for receiving input from the user, and the like are provided on the outer surface of the grip portion 110 .
  • the head part 120 is a member that has a shaving part 121 with a blade for cutting body hair and is connected to one end of the grip part 110 .
  • the head portion 120 is connected to the grip portion 110 so as to be relatively operable.
  • the direction of movement of the head portion 120 is not particularly limited, but the head portion 120 can be moved in the front-rear direction (the X-axis direction in the figure), the width direction Y (the Y-axis direction in the figure), and the vertical direction (the Z-axis direction in the figure). direction) can be swung in the circumferential direction about the axis.
  • the shaving portion 121 includes a plurality of first outer cutters 122 (four in the present embodiment) extending in the width direction and having a semi-cylindrical mesh-like through hole.
  • a second outer cutter 123 having a slit-like through hole arranged between 122 is provided.
  • the first outer cutter 122 and the second outer cutter 123 are attached to the head frame 124 , and the shaving portion 121 is detachable from the head base 125 .
  • a first inner cutter (not shown) provided corresponding to the first outer cutter 122 and a second inner cutter (not illustrated) provided corresponding to the second outer cutter 123 are arranged inside the head portion 120.
  • An inner cutter driving device is provided for reciprocatingly vibrating the first inner cutter and the second inner cutter in the width direction (the Y-axis direction in the drawing). By vibrating the first inner cutter and the second inner cutter with the inner cutter driving device, the hair inserted into the through holes of the first outer cutter 122 and the second outer cutter 123 vibrates the first inner cutter and the second inner cutter. Cut between the inner blades.
  • the imaging device 131 is a device that captures an image of the vicinity of the skin with which the shaving portion 121 abuts.
  • the imaging device 131 has a first outer blade 122 and a second outer blade 122 in the front-rear direction (the X-axis direction in the figure) in a state in which the shaving portion 121 is in contact with the skin.
  • the width direction the Y-axis direction in the drawing
  • the skin having a length corresponding to the entire width (the Y-axis direction in the drawing) of the first outer cutter 122 is cut at once. It has a wide angle of view. As a result, it is possible to accurately image the state of body hair and skin immediately before and after shaving.
  • the type of the imaging device 131 is not particularly limited, and for example, a so-called digital camera having an optical system including a lens and an imaging device that converts an image formed by the optical system into an electric signal can be exemplified. can.
  • the imaging device 131 is capable of imaging any of the lights of different spectrums emitted by the illumination device 160 .
  • the imaging device 131 is fixed to the head base body 125 of the head section 120 , and the imaging device 131 operates together with the movement of the head section 120 with respect to the grip section 110 .
  • the distance between the skin and the imaging device 131 can be stabilized even during shaving with the electric shaver 100, and a clearer image can be captured.
  • the image is taken at the central portion in the width direction (Y-axis direction in the drawing) of the substrate 133 projecting forward from the front side (X ⁇ side in the drawing) of the head substrate 125 .
  • Device 131 is attached. This is preferable because the imaging device 131 does not interfere when the head frame 124 is attached or detached.
  • the substrate 133 is also provided with an illumination device 160 such as a light-emitting diode (generally called an “LED”) that illuminates the skin within the angle of view of the imaging device 131 .
  • an illumination device 160 such as a light-emitting diode (generally called an “LED”) that illuminates the skin within the angle of view of the imaging device 131 .
  • the board 133 , imaging device 131 and lighting device 160 are covered with a cover 134 .
  • the lighting device 160 is a device capable of irradiating light of different spectrums to the area imaged by the imaging device 131 .
  • each spectrum with which the illumination device 160 irradiates a predetermined region is not particularly limited, for example, the illumination device 160 may be provided with light sources that emit light with different maximum peak wavelengths.
  • the light source provided in the illumination device 160 may be an LED or the like that emits light of substantially a single wavelength. A light source including a substance and the like may also be used. In the present embodiment, as shown in FIG.
  • lighting device 160 includes first light source 161 that emits light having a spectrum having a maximum peak in a wavelength region (a) of 620 nm or more, and a wavelength region of 580 nm or less (
  • a second light source 162 is provided which emits light in a spectrum having a maximum peak at b).
  • the reflection characteristic ratio of the skin becomes relatively low, and the contrast with the white body hair can be emphasized.
  • Both the first light source 161 and the second light source 162 illuminate the entire area imaged by the imaging device 131 .
  • a first light source 161 and a second light source 162 are attached to the substrate 133 to which the imaging device 131 is attached.
  • the notification device 140 is a device that notifies the user of the processing result of the image processing device 150 .
  • the notification method of the notification device 140 is not particularly limited, and can be exemplified by a method of notification using sound (including voice), light, vibration, electrical stimulation, a combination thereof, and the like.
  • the notification device 140 is a device that notifies information by light, and has a plurality of light emitting elements such as LEDs arranged side by side along the periphery of the end portion of the grip portion 110 on the side of the head portion 120 .
  • the notification device 140 can change at least one of brightness, color, and emission pattern of light.
  • FIG. 4 is a block diagram showing functional units of the image processing device 150.
  • the image processing device 150 is a device that controls the lighting device 160 and the imaging device 131 and processes an image obtained from the imaging device 131.
  • An imaging control unit 157 is provided as a processing unit realized by causing a processor to execute a program. and a property information generator 151 .
  • the image processing apparatus 150 further includes a shaving information generation unit 152 , a result notification unit 153 and an information acquisition unit 154 .
  • the imaging control unit 157 controls the lighting device 160 so as to individually irradiate light of different spectra, and the imaging device 131 controls the imaging device 131 so that the imaging timing of the imaging device 131 is synchronized with the timing of individually irradiating the lighting device 160 with light. is controlling In the case of this embodiment, the imaging control unit 157 controls the lighting device 160 so that the first light source 161 and the second light source 162 alternately emit light, and the first light source 161 and the second light source 162 emit light.
  • the image pickup device 131 is controlled so as to execute image pickup in accordance with the timing.
  • the property information generation unit 151 processes the image captured by the imaging device 131 with each of the lights of different spectra irradiated to the predetermined area, and generates property information indicating the property of the body hair.
  • the property information is, for example, information including at least one of hair length, hair growing direction, and hair density.
  • the property information generation unit 151 performs a contrast enhancement process on each of the images based on light with different spectra acquired by the information acquisition unit 154 .
  • the property information generation unit 151 increases the luminance contrast by performing tone conversion on the luminance of each pixel of the image so as to increase the change in the output tone with respect to the input tone.
  • fine noise such as irregularities of the skin may be removed.
  • the property information generation unit 151 performs contour extraction on the contrast-enhanced image. More specifically, the property information generator 151 performs binarization (that is, whitening/blackening) by outputting a white pixel when the luminance difference with the surrounding pixels is equal to or greater than a threshold, and outputting a black pixel when the luminance difference is less than the threshold. After that, expansion and contraction processing is performed to remove fine noise. Note that the expansion/contraction processing is the expansion processing that replaces the target pixel with white if even one white pixel exists around the target pixel, and the target pixel if there is even one black pixel around the target pixel. It is a contraction process that replaces the color with black. This contour extraction provides an image showing the contours of individual hairs.
  • binarization that is, whitening/blackening
  • the property information generation unit 151 may extract the contours of body hair from a plurality of images of the same region taken based on light irradiated with different spectra, and integrate the contours in the plurality of images. This makes it possible to effectively generate body hair property information even when black and white body hairs are mixed, such as when black body hairs and white body hairs grow at approximately the same ratio.
  • the property information generation unit 151 compares a plurality of images of the same area captured based on light irradiated with different spectra, and selects one image according to a predetermined condition, such as an image with the largest number of extracted contours. You can choose an image. This makes it possible to acquire property information that accurately indicates the property of the body hair of the color that is more abundant among black and white body hair.
  • the property information generation unit 151 calculates a circumscribing rectangle for each contour-extracted region. Specifically, the property information generator 151 calculates a circumscribing rectangle for each contour-extracted region such that the contour of the rectangle is in contact with the region corresponding to the extracted body hair. That is, for black body hair, a circumscribing rectangle surrounding a black portion is calculated, and for white body hair, a circumscribing rectangle surrounding a white portion is calculated.
  • the method for calculating the circumscribing rectangle is not limited to this method, and other methods may be used as long as a rectangle covering the outline of the hair can be calculated for estimating the length of the hair.
  • the property information generating unit 151 specifies the length of each hair by calculating the length of the long side of each calculated circumscribing rectangle.
  • the length of the two orthogonal sides of a right-angled triangle including the two sides along the orthogonal direction in which the pixels are arranged (here, the length of one piece is the number of pixels x given by the pixel interval) is calculated, and the length of the long side, which is the oblique side, is calculated using the Pythagorean theorem.
  • the direction of the hair may be calculated as the property information from the lengths of the two orthogonal sides.
  • the length and direction of each hair are specified from the image captured by the imaging device 131 . Furthermore, the property information generation unit 151 statistically processes the lengths and directions of the plurality of hairs included in the image, and converts the information representing the lengths and directions of the plurality of hairs in the image into numeric property information. Generate as When statistical processing is performed, the length of body hair may be used as a weight, or only data on body hair lengths equal to or greater than a predetermined length threshold may be used.
  • the property information generation unit 151 calculates the area of each area whose outline has been extracted, and calculates the total area of each area in the image. Furthermore, the property information generation unit 151 generates the ratio of the total area of the rectangular regions to the area of the image as quantified property information indicating the density of body hair.
  • the shaving information generation unit 152 generates shaving information related to shaving based on the property information generated by the property information generation unit 151 .
  • the shaving information is information including at least one of shaving direction and shaving end.
  • the shaving information generation unit 152 may generate shaving information indicating the end of shaving, for example, when the property information indicating the body hair length is equal to or less than the length threshold. Further, the shaving information generation unit 152 may generate shaving information indicating the end of shaving when the property information indicating the shaving density becomes equal to or less than the shaving density threshold.
  • the shaving information generation unit 152 may also generate shaving information indicating a shaving direction, which is a direction in which the shaving unit 121 is moved relative to the skin.
  • the shaving information generation unit 152 calculates a motion vector focusing on body hair, skin texture, etc. from images having the same light spectrum captured at predetermined intervals, and calculates the velocity obtained from the motion vector. is greater than or equal to the velocity threshold, over-velocity shave information may be generated.
  • the shaving information generation unit 152 calculates the blur width of body hair, skin texture, etc. from one image captured at a predetermined shutter speed (that is, exposure time), and obtains the blur width from the shutter speed and the blur width. Overspeed shave information may be generated if the received speed is greater than or equal to the speed threshold.
  • the shaving information generation unit 152 holds a plurality of thresholds having different values, such as a first length threshold that is 20% longer than the length threshold and a second length threshold that is 40% longer than the length threshold. Stepwise increasing or decreasing shaving information, such as shaving information according to length stages, may be generated.
  • the shaving information generation unit 152 After generating the shaving information indicating the end of shaving when the property information becomes equal to or less than the length threshold, the shaving density threshold, or the like, the shaving information generation unit 152 further determines the end of shaving based on the newly generated property information. When shaving information indicating excessive shaving is generated, shaving information indicating excessive shaving may be generated.
  • the result notification unit 153 controls the notification device 140 to notify the user of the shaving information generated by the shaving information generation unit 152 .
  • the result notification unit 153 notifies the user of the shaving information by controlling the light emitted by the light emitting device included in the notification device 140 to change at least one of brightness, color, and light emission pattern.
  • control is performed to emit red light to inform the user that shaving is not completed, and control to emit blue light when shaving information indicating completion of shaving is acquired from the shaving information generation unit 152. to notify the end of shaving.
  • the notification device 140 is controlled to flash in red to indicate excessive shaving. may be notified.
  • the result notification unit 153 controls the light emitted by the light emitting device to control the brightness, color, and light emission.
  • Stepwise shaving information may be notified to the user by changing at least one of the patterns stepwise. For example, the intensity of light may be stepwise increased or decreased, or the flashing interval of light emission may be lengthened or shortened.
  • the electric shaver 100 from each image captured by the imaging device 131 based on light of a plurality of spectra, information regarding body hair is extracted regardless of the color of the body hair, and shaving information regarding shaving is extracted. can be notified to the user. Therefore, the user can perform the shaving process while recognizing the speed at which the electric shaver 100 moves relative to the skin, the end of shaving in a predetermined area, and the like, thereby suppressing damage to the skin and reducing body hair. The shaving work can be efficiently advanced regardless of the color of the hair.
  • the present disclosure is not limited to the above embodiments.
  • another embodiment realized by arbitrarily combining the constituent elements described in this specification or omitting some of the constituent elements may be an embodiment of the present disclosure.
  • the present disclosure includes modifications obtained by making various modifications that a person skilled in the art can think of without departing from the gist of the present disclosure, that is, the meaning indicated by the words described in the claims, with respect to the above-described embodiment. be
  • the case of irradiating the skin by sequentially switching light of different spectra has been described, but as shown in FIG. may be acquired by the information acquiring unit 154, and the imaging control unit 157 may control the illumination device 160 and the imaging device 131 so that only light having a spectrum corresponding to the input information is emitted to capture an image.
  • the user can change the mode by recognizing whether the user is shaving black body hair or shaving white body hair, and can execute shaving, thereby increasing the speed of image processing.
  • the property information generation unit 151 may extract an image of a wavelength of a specific region from the acquired image and generate property information based on the extracted image. According to this, there is a possibility that the contrast between the body hair and the skin can be emphasized.
  • the notification device 140 having a light emitting element
  • the notification device 140 includes a sounding device such as a speaker, a vibrating device that generates vibration in the grip portion 110, and an electric stimulation to the hand that grips the grip portion 110.
  • An electrical muscle stimulator or the like to apply may be provided.
  • Such notification device 140 can notify shaving information by changing the intensity, generation pattern, direction, etc. of sound (including voice), vibration, electrical stimulation, and the like.
  • the shaving portion 121 is provided with a total of five outer cutters, four first outer cutters 122 and one second outer cutter 123, but the number of outer cutters is not particularly limited. Instead, the shaving portion 121 may have four or less, or six or more outer blades.
  • it may be the shaving portion 121 that shaves by rotating the inner blade with respect to the outer blade.
  • the mounting position of the imaging device 131 is not limited to the above-described embodiment. I don't mind. Alternatively, it may be attached to the grip portion 110 .
  • the number of imaging devices 131 is also not limited to one, and may be installed at a plurality of locations.
  • the present disclosure can be applied to electric shavers that can shave body hair of animals including humans, such as so-called electric shavers for shaving beards and so-called hair clippers for shaving hair.
  • An electric shaver derived from the present disclosure includes: An electric razor comprising: a grip portion gripped by a user; and a head portion having a shaving portion for cutting body hair and connected to one end of the grip portion, an imaging device for imaging the vicinity of the skin with which the shaving portion abuts; a lighting device capable of irradiating a region imaged by the imaging device with light of different spectra; and an image processing device that processes an image obtained from the imaging device,
  • the image processing device is an imaging control unit that controls the lighting device and the imaging device so as to individually irradiate light of different spectrums to capture an image; and a property information generating unit that generates property information indicating properties of the body hair based on the image captured by the imaging device.
  • an electric shaver derived from the present disclosure: An electric razor comprising: a grip portion gripped by a user; and a head portion having a shaving portion for cutting body hair and connected to one end of the grip portion, an imaging device for imaging the vicinity of the skin with which the shaving portion abuts; a lighting device capable of irradiating a region imaged by the imaging device with light of different spectra; an electrical and electronic circuit for processing images obtained from the imaging device; with The electrical and electronic circuit, during operation, controlling the lighting device and the imaging device so as to individually irradiate light of different spectrums and capture an image; Property information indicating the property of the body hair is generated based on the image captured by the imaging device.
  • Examples of electrical and electronic circuits are semiconductor devices such as integrated circuits (commonly called “ICs”) or large-scale integrated circuits (commonly called “LSIs").
  • ICs integrated circuits
  • LSIs large-scale integrated circuits

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

Abstract

La présente divulgation concerne un rasoir électrique qui peut détecter précisément la propriété de poils même dans le cas où les poils sont de couleur blanche. Un rasoir électrique (100) selon la présente divulgation comprend une partie poignée (110) et une partie tête (120) reliée à une extrémité de la partie poignée (110). Le rasoir électrique (100) est pourvu : d'un dispositif d'imagerie (131) qui capture une image du voisinage de la peau avec laquelle une partie de rasage (121) vient en contact ; d'un dispositif d'éclairage (160) qui peut exposer la zone à imager par le dispositif d'imagerie (131) à des faisceaux lumineux ayant des spectres différents ; et d'un dispositif de traitement d'image qui traite une image obtenue par le dispositif d'imagerie (131). Le dispositif de traitement d'image comprend : une unité de commande d'imagerie qui commande le dispositif d'éclairage (160) et le dispositif d'imagerie (131) de manière à exécuter une imagerie par émission individuelle de faisceaux lumineux ayant des spectres différents ; et une unité de génération d'informations de propriété qui génère des informations de propriété indiquant la propriété des poils sur la base d'une image capturée par le dispositif d'imagerie (131).
PCT/JP2022/003983 2021-02-16 2022-02-02 Rasoir électrique WO2022176619A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22755940.8A EP4296024A4 (fr) 2021-02-16 2022-02-02 Rasoir électrique
CN202280014152.XA CN116829317A (zh) 2021-02-16 2022-02-02 电动剃刀

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Application Number Priority Date Filing Date Title
JP2021-022283 2021-02-16
JP2021022283A JP2022124568A (ja) 2021-02-16 2021-02-16 電気かみそり

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WO2022176619A1 true WO2022176619A1 (fr) 2022-08-25

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JP (1) JP2022124568A (fr)
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JP2016106806A (ja) * 2014-12-05 2016-06-20 株式会社泉精器製作所 剃り残し判定方法、剃り残し判定プログラム、画像表示プログラム、電気かみそり、および髭剃りシステム
JP2020506771A (ja) * 2017-02-20 2020-03-05 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． パーソナルケア装置の操作

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US20140137883A1 (en) * 2012-11-21 2014-05-22 Reagan Inventions, Llc Razor including an imaging device
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EP3546153B1 (fr) * 2018-03-27 2021-05-12 Braun GmbH Dispositif de soins personnels
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JP2020506771A (ja) * 2017-02-20 2020-03-05 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． パーソナルケア装置の操作

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Title
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JP2022124568A (ja) 2022-08-26
EP4296024A4 (fr) 2024-08-07
CN116829317A (zh) 2023-09-29
EP4296024A1 (fr) 2023-12-27

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