WO2010089692A1 - Dispositif de rasage muni d'un élément de protection des poils - Google Patents

Dispositif de rasage muni d'un élément de protection des poils Download PDF

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Publication number
WO2010089692A1
WO2010089692A1 PCT/IB2010/050429 IB2010050429W WO2010089692A1 WO 2010089692 A1 WO2010089692 A1 WO 2010089692A1 IB 2010050429 W IB2010050429 W IB 2010050429W WO 2010089692 A1 WO2010089692 A1 WO 2010089692A1
Authority
WO
WIPO (PCT)
Prior art keywords
hair
carrier
cutting
cutting element
hairs
Prior art date
Application number
PCT/IB2010/050429
Other languages
English (en)
Inventor
Peter H. Van Der Vlis
Pieter S. Heerema
Erik Houbolt
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2010089692A1 publication Critical patent/WO2010089692A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/14—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor
    • B26B19/141—Details of inner cutters having their axes of rotation perpendicular to the cutting surface

Definitions

  • the present invention relates to a carrier which is adapted for use in a shaving device, and which is provided with at least one cutting element, wherein at least one portion of the cutting element is adapted to contact hairs and to perform a cutting action on hairs when being moved with respect to the hairs.
  • the present invention relates to a shaving device, comprising at least one carrier as mentioned, and means for driving the carrier such as to perform a movement.
  • a shaving device comprising at least one carrier as described above is known from EP 1 212 176.
  • the shaving device is a so-called rotary shaving device, i.e. a shaving device having at least one ring-shaped carrier which is provided with a number of cutting elements, wherein the carrier is driven such as to rotate during operation of the shaving device.
  • the shaving device is equipped with three carriers. Each carrier is covered by a cap which is intended to be used for contacting portions of skin to be subjected to a shaving action, and which is provided with openings for letting through hairs from the portions of skin to the cutting elements.
  • the shaving device comprises a motor for driving the carriers.
  • Proper use of the shaving device involves movement of the shaving device in such a way that the caps slide over portions of skin. In the process, hairs protruding from the skin are continuously caught in the cap openings and are cut through as soon as they are encountered by the moving cutting elements of the carriers, wherein edges of the cap openings serve as counter cutting edges.
  • EP 1 212 176 discloses blade-shaped hair engaging and lifting devices which are provided with a thickened end with an edge, wherein this edge serves for coming into contact with hairs during operation of the shaving device and pulling the hairs further through the cap openings.
  • the hair engaging and lifting devices are elastically arranged with respect to the cutting elements, at positions close to these elements.
  • the object is achieved by providing a carrier which is adapted for use in a shaving device, and which is provided with at least one cutting element as described in the foregoing, and which further comprises a hair protecting device which is associated with the cutting element, and which protrudes with respect to the cutting element in a direction in which the cutting element is movable, and which has at least one parting and guiding element which has a most protruding portion and two surfaces extending from the most protruding portion to positions which are less protruding, wherein the most protruding portion comprises a free distal end portion of the parting and guiding element, wherein one of the surfaces provides a pathway towards the hair contacting and cutting portion of the cutting element, and wherein another of the surfaces provides a pathway outside of the hair contacting and cutting portion of the cutting element.
  • an additional device is provided, which is suitable to be used for either assigning a hair to the hair contacting and cutting portion of the cutting element or rejecting a hair without inflicting damage on the hair.
  • the device comprises at least one parting and guiding element having the above-described design with the most protruding portion and two guiding surfaces.
  • the hair protecting device is designed such as to prevent damage to the hairs.
  • this portion may comprise a parting surface which has a certain width and which extends more or less in a longitudinal direction of the hairs, so that a large as possible portion of the hair may be contacted by this portion, whereby high local pressures and cutting actions on the hairs are avoided.
  • the hair protecting device has two parting and guiding elements, so that the process of assigning a hair to the hair contacting and cutting portion of the cutting element or keeping a hair away from said portion may be performed at two ends of said portion.
  • the hair protecting device may be substantially U-shaped, wherein the parting and guiding elements constitute legs of the U-shape.
  • the hair protecting device may be designed as a kind of U-shaped hair catcher which is designed such as not to damage hairs which are made to move from outmost ends of its legs towards its base along an outside surface.
  • a single-sided embodiment is also possible within the scope of the present invention, wherein the hair protecting device may be substantially L-shaped instead of U- shaped.
  • a distance between the most protruding portions of the parting and guiding elements of the hair protecting device is at least equal to a length of a cutting edge of the cutting element, i.e. a functional length along which the cutting element is actually adapted to perform a hair cutting action.
  • the carrier according to the present invention is suitable to be applied in a shaving device which comprises a cap for covering the carrier and contacting portions of skin to be subjected to a shaving action, which cap is provided with openings for letting through hairs from the portions of skin to the cutting element of the carrier.
  • the guiding surfaces of the hair protecting device are preferably orientated such as to be parallel to both the direction in which the cutting element of the carrier is movable and the longitudinal direction of hairs extending through the cap holes. In that way, the hair protecting device can perform its parting function well without the presence of surface edges which are more or less perpendicular to the hairs, and which may perform a cutting action. Furthermore, it is ensured that only the hairs which are fully or partly in the path of the cutting element are manipulated, and that the surrounding hairs are not touched.
  • the most protruding portion of the parting and guiding element of the hair protecting device may comprise a parting surface.
  • a parting surface it is noted that it may have at least two portions which are orientated at an angle with respect to each other (i.e. two portions having mutually different orientations), as, in that case, one of the portions may be used for putting hairs which are encountered by the parting surface and which have an inclined orientation in a more upright position.
  • This is advantageous in view of the fact that hairs in an upright position are cut off at a level which is closer to the skin than hairs having an inclined orientation.
  • the design of the parting surface may be such that a portion of this surface which is closest to the cap is closer to a perpendicular orientation with respect to the cap than a portion which is further away from the cap.
  • the manufacturing process of the carrier according to the present invention does not have to be a more complicated process.
  • the carrier further comprises a device which is adapted to engage hairs and lift hairs before the hairs are cut through by the cutting element, which device is associated with the cutting element, and which is movably arranged with respect to the cutting element, at a position in front of the cutting element as seen in a direction in which the carrier is intended to be moved in a shaving device, the hair protecting device may simply be arranged on the hair engaging and lifting device.
  • the basic shape of the hair engaging and lifting device is provided with two additional flaps, as it were, which are bent such as to protrude from the device.
  • the hair protecting device may also be arranged on the cutter element if so desired, or in case there is no hair engaging and lifting device.
  • a carrier for use in a shaving device is provided with a plurality of cutting elements and a plurality of hair protecting devices as described in the foregoing.
  • each cutting element has a hair protecting device engaged therewith in order to achieve optimal shaving results.
  • Figure 1 shows a perspective view of a shaving device
  • Figure 2 shows an embodiment of a carrier according to the present invention, which is provided with a number of cutting elements, hair engaging and lifting devices, and hair protecting devices;
  • Figure 3 shows a detail of Figure 2
  • Figures 4 and 5 illustrate an effect of hairs being put in a more upright position by the hair protecting devices
  • FIGS. 6 and 7 diagrammatically show different views of a hair protecting device
  • Figure 8 diagrammatically shows an alternative design of a hair protecting device.
  • FIG. 1 shows a general example of a shaving device 1.
  • the shaving device 1 as shown is a rotary shaving device in which a shaving action is realized by using rotating components.
  • Another well-known type of shaving device is a device in which a shaving action is realized by using reciprocating components.
  • the present invention is applicable in various types of shaving devices.
  • the shaving device 1 comprises a housing 2 and a shaving head holder 3.
  • the housing 2 is intended to be taken hold of by a user of the shaving apparatus 1, while the shaving head holder 3 is intended to be positioned against skin which is to be subjected to a shaving action.
  • a number of units 4 are present in the shaving head holder 3, which are usually referred to as shaving heads 4.
  • the shaving device 1 has three shaving heads 4.
  • Each shaving head 4 comprises a cap 5 having openings 6 for letting through hairs to the inside of the shaving head 4, and a number of cutting elements (not shown in Figure 1) which are positioned in the inside of the shaving head 4, and which are adapted to cut off the hairs.
  • the cutting elements are arranged on a carrier 7, which is driven such as to rotate during operation of the shaving device 1.
  • the shaving device 1 may be equipped with any suitable driving means such as a small electric motor.
  • the carrier 7 is composed of a number of components, including a ring-shaped component 9 having a number of arms 10 arranged along its circumference, wherein end portions of the arms 10 are shaped such as to constitute the cutting elements 8, and wherein outer ends of the arms 10 are shaped such as to constitute cutting edges 11 of the cutting elements 8.
  • a ring-shaped component 9 having a number of arms 10 arranged along its circumference, wherein end portions of the arms 10 are shaped such as to constitute the cutting elements 8, and wherein outer ends of the arms 10 are shaped such as to constitute cutting edges 11 of the cutting elements 8.
  • Figure 3 shows a detail of Figure 2.
  • the carrier 7 comprises another ring-shaped component 12 on which a number of arms 13 are arranged. End portions of these arms 13 are intended to be used as hair lifting devices 14 during operation of the shaving device 1.
  • the cutting elements 8 and the hair lifting devices 14 come in mixed pairs, i.e. one cutting element 8 is associated with one hair lifting device 14.
  • the arms 13 of the hair lifting devices 14 comprise hook-shaped portions, by means of which these arms 13 are connected to the arms 10 of the cutting elements 8. In this configuration, the hair lifting devices 14 lie against the cutting elements 8.
  • the hair lifting devices 14 are slidable with respect to the cutting elements 8 due to elastic properties of the arms 13 of the hair lifting devices 14.
  • the hair lifting devices 14 are arranged in front of the cutting elements 8 as seen in a direction in which the carrier 7 is intended to be moved.
  • metal is a suitable material for the ring-shaped components 9, 12 having the cutting elements 8 and the hair lifting devices 14, respectively.
  • the operation of a shaving device 1 having one or more shaving heads 4 in which the carrier 7 as shown in Figure 2 is arranged is as follows.
  • the caps 5 of the shaving heads 4 are moved across a portion of skin to be subjected to the shaving action by a user of the shaving device 1, and the carriers 7 are driven such as to rotate at their position right behind the caps 5. Due to the movement of the shaving heads 4 with respect to the skin, there is a continuous process of hairs getting trapped inside the cap openings 6 and being encountered by the pairs of a cutting element 8 and a hair lifting device 14. In the process, the hair is encountered by the hair lifting device 14 first, wherein an outer edge 15 of the hair lifting device 14 penetrates the hair to some extent. In any case, the outer edge 15 of the hair lifting device 14 is not adapted to cut through the hair, but only to enter the hair over a small distance which is smaller than the diameter of the hair.
  • the ongoing rotary movement of the carrier 7 and the components arranged thereon causes the hair lifting device 14 to slide along the cutting element 8 and perform a retracting movement over some distance.
  • the cutting elements 8 and the hair lifting devices 14 have a defined inclined orientation as shown in the Figures.
  • a hair which is caught keeps the hair lifting device 14 temporarily in a fixed place while the associated cutting element 8 presses against the hair lifting device 14 in the rotary movement. Due to the elastic properties of the arm 13 of the hair lifting device 14, this causes the hair lifting device 14 to perform a retracting movement, and also due to the engagement of the hair lifting device 14 with a hair, this movement is a retracting movement, which is more or less in a direction in which the hair extends.
  • the hair is lifted to some extent, inter alia owing to natural elasticity of the skin, and gets cut off once the hair lifting device 14 is retracted to such extent that the cutting edge 11 of the cutting element 8 reaches the hair.
  • a shaving action can also be performed with the use of carriers 7 which are only equipped with cutting elements 8, wherein the hair lifting devices 14 are omitted.
  • applying the hair lifting devices 14 leads to better shaving results, as the hairs may be cut off at a level which is closer to the skin.
  • the carrier 7 as shown in Figure 2 has special features according to the present invention.
  • the carrier 7 is equipped with components for preventing damage to hairs which are not exactly in the path of the pairs of cutting element 8 and hair lifting device 14, but which are still encountered by at least one of these pairs and rejected.
  • the carrier 7 comprises hair protecting devices 16, which comprise two flaps 17 on the hair lifting devices 14 in the shown example of the carrier 7.
  • the flaps 17 of the hair lifting devices 14 are orientated more or less according to the direction of the rotary movement of the carrier 7. Hence, surfaces 18, 19 of the flaps 17 are more or less parallel to this direction.
  • a free distal edge 20 of the flaps 17, which is a most protruding edge of the flaps 17, comprises an elongated surface which will be referred to as parting surface 20. It is noted that the parting surface 20 comprises two portions 21, 22 having mutually different orientations, wherein an orientation of a portion 21 which is closer to the outer edge 15 of the hair lifting device 14, i.e.
  • a portion 21 which is intended to contact hairs closer to the place where they enter the inside of a shaving head 4 in which the carrier 7 may be arranged, is closer to an orientation in a direction of an axis of rotation of the carrier 7 than a portion 22 which is further away from the edge 15 as mentioned.
  • first portion 21 of the parting surface 20 will be referred to as first hair manipulating portion 21, and the latter portion 22 of the parting surface 20 will be referred to as second hair manipulating portion 22.
  • the function of the hair protecting device 16 comprising the flaps 17 as described in the foregoing is as follows.
  • Figure 5 illustrates that a hair 23 in an upright position may be cut off at a level closer to the position of entry into the inside of a shaving head 4 in which the carrier 7 may be arranged, i.e. closer to the skin, which is advantageous in view of the shaving results.
  • a line along which the hair 23 will be cut in a conventional situation and a line along which the hair 23 will be cut in a situation according to the present invention are diagrammatically shown in Figure 5 by means of dashed lines. The difference of the level of the cuts may be seen at the right side of the Figure, where a hair 23 is shown in a most upright position.
  • the hair 23 is either rejected or assigned to the outer edge 15 of the hair lifting device 14.
  • the hair 23 slides along an outer surface 18 of the flap 17 concerned, and is thereby smoothly led to a position behind the whole of the cutting element 8 and the hair lifting device 14.
  • damage of the hair 23 does not occur, and the hair 23 may be cut through later on.
  • the hair 23 slides along an inner surface 19 of the flap 17 concerned, and is thereby smoothly led to a position where it is encountered by the outer edge 15 of the hair lifting device 14. At that position, the hair 23 is lifted further, and is subsequently cut through by the cutting edge 11 of the cutting element 8.
  • a first important advantage is the prevention of damage to hairs 23, which would otherwise be damaged because they are encountered by end zones of the cutting elements 8 and the hair lifting devices 14, and rejected, i.e. not subjected to a lifting and cutting action.
  • damage to the hairs 23 it is achieved that all hairs 23 may eventually be cut off during a shaving action, so that excellent shaving results are obtained.
  • a second important advantage is that the hairs 23 are lifted to some extent before they are caught by the outer edge 15 of a hair lifting device 14, and may also be put in a more upright position if the original position is an inclined position, so that they may be cut through at a level which is even closer to skin level than in case they would only be lifted by a hair lifting device 14.
  • Figures 6 and 7 diagrammatically show different views of a hair protecting device 16.
  • the different orientations of the portions 21, 22 of the parting surface 20 of the hair protecting device 16 can clearly be seen.
  • Figure 7 elucidates the mutual positioning of the two flaps 17 of the hair protecting device 16.
  • the parting surface 20 it is not necessary for the parting surface 20 to comprise two (or more) portions 21, 22. However, in such a case, negative side effects of the application of the hair protecting devices 16 may occur.
  • the thickness of the carrier 7 is higher at positions corresponding to the end zones of the edges 11, 15 of the cutting elements 8 and the hair lifting devices 14 than at positions corresponding to a middle portion of said edges 11, 15.
  • the hair protecting devices 16 may be favorable to have a design of the hair protecting devices 16 which is aimed at guiding hairs 23 which are assigned to said edges 11, 15 to the middle portion thereof, in order to improve shaving results on the basis of cutting off the hairs 23 only in a zone corresponding to the thinnest portion of the cap 5.
  • Such a design of the hair protecting devices 16 may be more like a V-shape than a U-shape, in which the base is smaller and the legs (flaps 17) diverge with respect to each other, as seen from the base to the most protruding portion of the legs.
  • the design according to which the hair protecting device 16 has more of a V-shape than a U-shape is diagrammatically shown in Figure 8, wherein the U-shape is shown in a lighter color to illustrate the difference between the shapes.
  • the design of the hair protecting devices 16 may be chosen such as to yield optimal shaving results under the circumstances of the application of the carrier 7 comprising the hair protecting devices 16 in a certain shaving head 4.
  • the design should be aimed at obtaining a hair protecting function, which is achieved by keeping hairs 23 away from end zones of the cutting elements 8 and the hair lifting devices 14, and preferably also a hair lifting function, additional to the hair lifting function of the hair lifting devices 14, and a function of putting hairs 23 in a more upright position before being cut through.
  • a shaving device 1 cutting elements 8 are arranged on a movably arranged carrier 7 for performing the required function of cutting through hairs 23.
  • a movably arranged carrier 7 for performing the required function of cutting through hairs 23.
  • an end zone of a cutting edge 11 of a cutting element 8 encounters a hair 23, it may happen that the hair 23 is damaged to such an extent that the hair 23 cannot be cut at a later stage of a shaving action.
  • hair protecting devices 16 which are associated with the cutting elements 8, and which are adapted to safely guide a hair 23 which is in the path of an end zone of a cutting edge 11 of a cutting element 8 to a position well in front of the cutting edge 11, or to safely guide a hair 23 to a position outside of said end zone, whatever the case may turn out to be when the carrier 7 moves on, without inflicting damage on the hair 23.
  • the carrier 7 may also be equipped with hair lifting devices 14 arranged in front of the cutting elements 8 as seen in the intended direction of movement of the carrier 7.
  • hair lifting devices 14 arranged in front of the cutting elements 8 as seen in the intended direction of movement of the carrier 7.
  • the hair protecting devices 16 are arranged on these hair lifting devices 14, but other arrangements of the hair protecting devices 16 are also possible within the scope of the present invention.
  • the hair protecting devices 16 comprise two flaps 17, wherein each flap 17 has a parting surface 20 at a most protruding position, i.e. at a position where a hair 23 is encountered first.
  • the parting surface 20 is designed such as not to inflict damage on the hair 23 while forcing the hair 23 to move to one of two sides of the parting surface 20 as the carrier 7 moves on during operation.
  • the hair protecting devices 16 may also have a hair lifting function and a function of putting a hair 23 in a more upright position before being cut through.

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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

L'invention concerne un dispositif de rasage comprenant des éléments de coupe (8) agencés sur un support mobile. Toutefois, lorsqu'une zone d'extrémité d'un bord de coupe (11) d'un élément de coupe (8) rencontre un poil, il peut arriver que ce dernier soit endommagé à tel point qu'il ne puisse pas être coupé à une étape ultérieure d'une action de rasage. Cet inconvénient disparaît en présence de dispositifs de protection des poils (16), qui sont associés aux éléments de coupe (8), et qui sont adaptés pour guider un poil qui se trouve sur le trajet d'une zone d'extrémité d'un bord de coupe (11) d'un élément de coupe (8), dans une position bien en face du bord de coupe (11), ou pour guider un poil dans une position à l'extérieur de ladite zone d'extrémité, selon le cas qui se présente lorsque le support se déplace, sans endommager le poil.
PCT/IB2010/050429 2009-02-04 2010-02-01 Dispositif de rasage muni d'un élément de protection des poils WO2010089692A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09152016 2009-02-04
EP09152016.3 2009-02-04

Publications (1)

Publication Number Publication Date
WO2010089692A1 true WO2010089692A1 (fr) 2010-08-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120011724A1 (en) * 2009-03-30 2012-01-19 Koninklijke Philips Electronics N.V. Carrier for a shaving device, comprising pairs of a cutting element and a hair lifting element
JP2015500123A (ja) * 2011-12-19 2015-01-05 コーニンクレッカ フィリップス エヌ ヴェ ドーミング制御を備える改良されたシェービングヘッド
US20150343652A1 (en) * 2014-05-30 2015-12-03 Izumi Products Company Rotary electric shaver

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2008471A (en) * 1977-11-28 1979-06-06 Philips Nv Dry-Shavers
US4281453A (en) * 1978-09-18 1981-08-04 U.S. Philips Corporation Shaving apparatus
EP0111967A1 (fr) * 1982-12-17 1984-06-27 Koninklijke Philips Electronics N.V. Rasoir électrique
EP1212176A1 (fr) 2000-05-23 2002-06-12 Koninklijke Philips Electronics N.V. Appareil de rasage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2008471A (en) * 1977-11-28 1979-06-06 Philips Nv Dry-Shavers
US4281453A (en) * 1978-09-18 1981-08-04 U.S. Philips Corporation Shaving apparatus
EP0111967A1 (fr) * 1982-12-17 1984-06-27 Koninklijke Philips Electronics N.V. Rasoir électrique
EP1212176A1 (fr) 2000-05-23 2002-06-12 Koninklijke Philips Electronics N.V. Appareil de rasage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120011724A1 (en) * 2009-03-30 2012-01-19 Koninklijke Philips Electronics N.V. Carrier for a shaving device, comprising pairs of a cutting element and a hair lifting element
US9993929B2 (en) * 2009-03-30 2018-06-12 Koninklijke Philips N.V. Carrier for a shaving device, comprising pairs of a cutting element and a hair lifting element
JP2015500123A (ja) * 2011-12-19 2015-01-05 コーニンクレッカ フィリップス エヌ ヴェ ドーミング制御を備える改良されたシェービングヘッド
US20150343652A1 (en) * 2014-05-30 2015-12-03 Izumi Products Company Rotary electric shaver
US9789616B2 (en) * 2014-05-30 2017-10-17 Izumi Products Company Rotary electric shaver

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