EP1115538B1 - Tete de rasage a manipulateur de poils rotatif - Google Patents

Tete de rasage a manipulateur de poils rotatif Download PDF

Info

Publication number
EP1115538B1
EP1115538B1 EP00954484A EP00954484A EP1115538B1 EP 1115538 B1 EP1115538 B1 EP 1115538B1 EP 00954484 A EP00954484 A EP 00954484A EP 00954484 A EP00954484 A EP 00954484A EP 1115538 B1 EP1115538 B1 EP 1115538B1
Authority
EP
European Patent Office
Prior art keywords
cutting edge
hair manipulator
shaving head
skin
rotation
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.)
Expired - Lifetime
Application number
EP00954484A
Other languages
German (de)
English (en)
Other versions
EP1115538A2 (fr
Inventor
Johannes T. W. M. Van Eemeren
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 NV filed Critical Koninklijke Philips Electronics NV
Priority to EP00954484A priority Critical patent/EP1115538B1/fr
Publication of EP1115538A2 publication Critical patent/EP1115538A2/fr
Application granted granted Critical
Publication of EP1115538B1 publication Critical patent/EP1115538B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/34—Safety razors with one or more blades arranged transversely to the handle of the type carrying rollers

Definitions

  • the invention relates to a shaving head comprising a cutting member having a cutting edge for cutting hairs growing from skin and a hair manipulator which is arranged, viewed in a displacement direction of the shaving head, in front of the cutting edge and which can be rotated about an axis of rotation extending substantially parallel to the cutting edge to move the hairs in a direction substantially parallel to the cutting edge.
  • a shaving head of the type mentioned in the opening paragraph is known from US Patent 2,568,047.
  • the known shaving head is detachably secured to a holder provided with a handle.
  • the cutting member is arranged in a fixed position in the shaving head.
  • the hair manipulator comprises a circularly cylindrical guide roller extending substantially parallel to the cutting edge.
  • Said guide roller comprises two contiguous series of semi-annular grooves which are mutually arranged so as to form a V, said semi-annular grooves being obliquely arranged with respect to the axis of rotation, and one of the grooves being in engagement with a cam which is arranged in a fixed position with respect to the cutting member.
  • the guide roller When a user moves the shaving head over the skin in the displacement direction, the guide roller is rotated about the axis of rotation as a result of contact with the skin.
  • the engagement of said cam with one of the grooves in combination with the rotation of the guide roller leads to reciprocating movements of the guide roller with respect to the cutting member in a direction substantially parallel to the cutting edge.
  • the skin which is present in front of the cutting edge and which is in contact with the guide roller is reciprocated in a direction substantially parallel to the cutting edge, causing the hairs present on the skin in front of the cutting edge to be reciprocated along the cutting edge during the cutting operation.
  • a cutting force necessary in the displacement direction to cut the hairs is limited substantially, resulting in a substantial improvement of the shaving performance and the shaving comfort of the shaving head.
  • a drawback of the known shaving head resides in that during the displacement of the shaving head over the skin, a skin crease may readily be formed between the rotating hair manipulator and the cutting edge, which may lead to skin irritations or even incised wounds.
  • a shaving head in accordance with the invention is characterized in that the hair manipulator is drivable in a direction of rotation in which the hair manipulator moves away from the cutting edge at locations where the hair manipulator is in contact with the skin.
  • the hair manipulator smoothes the skin directly in front of the cutting edge in a direction away from the cutting edge, so that skin creases in front of the cutting edge are precluded as much as possible.
  • the rotation of the hair manipulator in said direction of rotation leads to the generation of reciprocating movements of the hairs present in front of the cutting edge in a direction substantially parallel to said cutting edge, as in the known shaver, resulting in a limitation of the cutting forces necessary in the displacement direction.
  • a particular embodiment of a shaving head in accordance with the invention is characterized in that the hair manipulator is arranged in a substantially fixed position with respect to the cutting member, viewed in a direction parallel to the cutting edge, and provided with a circularly cylindrical surface having a series of annular grooves which are obliquely arranged with respect to the axis of rotation.
  • the hair manipulator is arranged in a substantially fixed position with respect to the cutting member, viewed in a direction parallel to the cutting edge, and provided with a circularly cylindrical surface having a series of annular grooves which are obliquely arranged with respect to the axis of rotation.
  • the hairs are first caught in said grooves.
  • the grooves With providing the grooves with a suitable width and a suitable mutual interspace for this purpose, reciprocating movements of the hairs caught in the grooves in a direction substantially parallel to the cutting edge are generated by means of the hair manipulator, so that the hairs are reciprocated along the cutting edge during the cutting operation and the cutting forces are reduced.
  • a further embodiment of a shaving head in accordance with the invention is characterized in that the hair manipulator is arranged in a substantially fixed position with respect to the cutting member, viewed in a direction parallel to the cutting edge, and provided with a series of disc-shaped elements which are obliquely arranged with respect to the axis of rotation and provided with mutual interspaces.
  • the disc-shaped elements are obliquely arranged with respect to the axis of rotation, reciprocating displacements of the interspaces between the discs occur near the cutting edge, during rotation of the hair manipulator, said displacements taking place with respect to the cutting edge in a direction substantially parallel to the cutting edge.
  • a shaver in accordance with the invention is provided with a shaving head in accordance with the invention and a drive mechanism for driving the hair manipulator in said direction of rotation.
  • the shaving head is, for example, detachably secured to a housing or a holder of the shaver wherein the drive mechanism is arranged, so that the shaving head can be exchanged if the cutting member has become blunt.
  • Fig. 1 shows an embodiment of a shaver 1 in accordance with the invention, which shaver comprises a housing 3 on which a shaving head 5 in accordance with the invention is detachably secured by means of securing means 7 which, for the sake of simplicity, are only diagrammatically shown in the Figure and may be of a customary type which is known per se.
  • the housing 3 accommodates an electric motor 9, a battery 11 for feeding the motor 9, and an electric control element 13 for controlling the motor 9.
  • the motor 9 can be switched on and off by means of a switch 15 provided on the housing 3.
  • the shaving head 5 is provided with a cutting member 17 which is arranged in a fixed position in the shaving head 5.
  • the cutting member 17 is plate-shaped and provided with a straight cutting edge 19 for cutting hairs growing from skin.
  • the cutting edge 19 extends parallel to an X-direction which is perpendicular to a displacement direction or shaving direction Y of the shaving head 5.
  • the shaving head 5 further comprises a hair manipulator 21 which, viewed in the displacement direction Y, is arranged in front of the cutting edge 19 and can be rotated about an axis of rotation 23 which extends substantially parallel to the cutting edge 19.
  • the hair manipulator 21 comprises a shaft 25 which is mounted in the shaving head 5 by means of two bearing bushes 27 and 29 so as to be rotatable about the axis of rotation 23. Viewed in a direction parallel to the X-direction, the shaft 25 is confined between two closing elements 31 and 33, so that the hair manipulator 21 is arranged in a substantially fixed position with respect to the shaving head 5 and the cutting member 17, viewed in a direction parallel to the cutting edge 19.
  • the hair manipulator 21 further comprises a series of disc-shaped elements 35 which are arranged on the shaft 25 at regular distances G with respect to each other and are obliquely arranged with respect to the axis of rotation 23.
  • disc-shaped elements 35 are provided substantially throughout the length of the cutting edge 19 but, for the sake of simplicity, only a few disc-shaped elements 35 are shown in Fig. 2.
  • the hair manipulator 21 is drivable about the axis of rotation 23 by means of a drive mechanism 37 of the shaver 1, which comprises the above-mentioned motor 9.
  • the drive mechanism 37 further comprises an outgoing shaft 39 of the motor 9 extending substantially parallel to the X-direction, a first friction wheel 41 which is secured to the outgoing shaft 39, a second friction wheel 43 which is mounted in the shaving head 5 so as to be rotatable about a shaft 45 extending parallel to the X-direction, and a third friction wheel 47 which is provided on the shaft 25 of the hair manipulator 21 and is in contact with the second friction wheel 43.
  • the second friction wheel 43 is in contact with the first friction wheel 41, so that the hair manipulator 21 is drivable by the motor 9, while the second friction wheel 43 is released from the first friction wheel 41 when the shaving head 5 is detached from the housing 3.
  • the shaving head 5 in contact with skin 49 to be treated via the disc-shaped elements 35 of the hair manipulator 21 and via a supporting element 51 of the shaving head 5, the cutting edge 19 of the cutting member 17 being situated substantially at a surface 53 of the skin 49.
  • the hair manipulator 21 in operation, is driven by the drive mechanism 37 in a direction of rotation R, causing the disc-shaped elements 35 of the hair manipulator 21 to move away from the cutting edge 19 at locations where the disc-shaped elements 35 are in contact with the skin 49.
  • Figs. 1 and 2 show a hair 55 to be cut.
  • a diameter D 1 of the disc-shaped elements 35 is so much larger than a diameter D 2 of the shaft 25 that the hair 55 can travel past the shaft 25 and penetrate as far as the cutting edge 19.
  • the diameter D 1 is approximately 1 mm and the diameter D 2 is approximately 0.4 mm, so that hairs, which have an average growing period of 1 to 2 days, can easily penetrate as far as the cutting edge 19.
  • the disc-shaped elements 35 are obliquely arranged with respect to the axis of rotation 23, and the hair manipulator 21 is arranged in a fixed position with respect to the cutting member 17, viewed in a direction parallel to the X direction, rotation of the hair manipulator 21 causes, near the cutting edge 19, reciprocating movements of the disc-shaped elements 35 with respect to the cutting edge 19 in a direction parallel to the cutting edge 19.
  • the hair 55 present between the rotating disc-shaped elements 35 is reciprocated by the disc-shaped elements 35 in a direction substantially parallel to the cutting edge 19.
  • the hair 55 is reciprocated along the cutting edge 19 during the cutting operation, causing the cutting force necessary in the displacement direction Y to cut the hair 55 to be limited substantially.
  • the shaving performance but also the shaving comfort of the shaver 1 is improved considerably.
  • the distance G between the disc-shaped elements 35 and a width W of the disc-shaped elements 35 are both approximately 0.3 mm, while the disc-shaped elements 35 include an angle ⁇ of approximately 60° with the axis of rotation 23. Satisfactory results are obtained if the distance G between the disc-shaped elements 35 ranges between approximately 0.1 mm and 0.4 mm and if the rotation frequency of the hair manipulator 21 is approximately 100 Hz or higher.
  • the disc-shaped elements 35 of the hair manipulator 21 are, for example, made from a synthetic resin or a hard type of rubber, so that a high frictional force between the rotating disc-shaped elements 35 and the skin 49 is obtained.
  • the shaft 25 of the hair manipulator is, for example, manufactured from a type of steel, and the disc-shaped elements are, for example, shrunk onto the shaft 25.
  • the shaft 25 and the disc-shaped elements 35 may alternatively be manufactured as a single integrated part of synthetic resin by means of, for example, an injection molding process.
  • a hair manipulator 21' of an alternative embodiment of a shaving head 5' in accordance with the invention may also be manufactured by means of such an injection molding process.
  • the hair manipulator 21' of the shaving head 5' is also shown in Fig.
  • the hair manipulator 21' is provided with a series of ring-shaped grooves 59' which are spaced at regular intervals G' in the surface 57' and are obliquely arranged with respect to the axis of rotation 23.
  • the grooves 59' are provided substantially throughout the length of the cutting edge 19, but in Fig. 2 only a few grooves 59' are shown for the sake of simplicity.
  • the depth of the grooves 59' approximately corresponds to half a difference between the diameters D 1 and D 2 in the case of the hair manipulator 21, and the width W' of said grooves approximately corresponds to the distance G in the case of the hair manipulator 21, while the distance G', in the case of the hair manipulator 21', approximately corresponds to the width W in the case of the hair manipulator 21.
  • the operation of the hair manipulator 21' substantially corresponds to that of the hair manipulator 21.

Landscapes

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

Abstract

L'invention concerne une tête de rasage (5) qui comporte un élément coupant (17) doté d'un bord coupant (19), destinée à couper les poils (55) d'une peau humaine (49). La tête de rasage (5) comporte également un manipulateur (21) de poils disposé devant le bord coupant, visualisé dans une direction de rasage (Y) de la tête de rasage. Le manipulateur de poils peut être pivoté par rapport à un axe de rotation (23) s'étendant de manière sensiblement parallèle au bord coupant. Selon l'invention, le manipulateur de poils peut être entraîné dans une direction de rotation R dans laquelle le manipulateur s'éloigne du bord coupant, et vient au contact de la peau. De cette manière, le manipulateur de poils rotatif lisse la peau devant le bord coupant, de façon à éliminer le plus possible les plis de la peau devant le bord coupant, cause de coupures et d'irritations cutanées. Le manipulateur de poils protège ainsi efficacement la peau contre ces coupures et irritations. Dans un mode de réalisation préféré, le manipulateur de poils comporte plusieurs éléments en forme de disque (35), montés sur une tige rotative (25) à intervalles réguliers (G) et disposés de manière oblique par rapport à l'axe de rotation.

Claims (4)

  1. Tête de rasage (5) munie d'un élément à couper les poils (17) présentant un bord coupant (19) permettant de couper les poils (55) de la peau (49) et d'un manipulateur de poils (21, 21') qui est disposé, vu dans une direction de déplacement (Y) de la tête de rasage, en face du bord coupant et qui peut être porté à rotation autour d'un axe de rotation (23) s'étendant pratiquement de façon parallèle au bord coupant afin de déplacer les poils dans une direction pratiquement parallèle au bord coupant, caractérisée en ce que le manipulateur de poils peut être entraíné dans une direction de rotation (8) dans laquelle le manipulateur de poils s'écarte du bord coupant (19) aux endroits où le manipulateur de poils est en contact avec la peau.
  2. Tête de rasage selon la revendication 1, caractérisée en ce que le manipulateur de poils (21') est disposé dans une position pratiquement fixe par rapport à l'élément à couper les poils, vu dans une direction parallèle par rapport au bord coupant, et est muni d'une surface en forme de cylindre de révolution (57') présentant une série de rainures annulaires (59') qui sont disposées de façon oblique par rapport à l'axe de rotation.
  3. Tête de rasage selon la revendication 1, caractérisée en ce que le manipulateur de poils (21) est disposé dans une position pratiquement fixe par rapport à l'élément à couper les poils, vu dans une direction parallèle par rapport au bord coupant, et est muni d'une série d'éléments en forme de disque (35) qui sont disposés de façon oblique par rapport à l'axe de rotation et munis d'intervalles mutuels.
  4. Rasoir électrique muni d'une tête de rasage selon la revendication 1, 2 ou 3, et d'un mécanisme d'entraínement servant à entraíner le manipulateur de poils rotatif dans la susdite direction de rotation.
EP00954484A 1999-07-22 2000-07-12 Tete de rasage a manipulateur de poils rotatif Expired - Lifetime EP1115538B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00954484A EP1115538B1 (fr) 1999-07-22 2000-07-12 Tete de rasage a manipulateur de poils rotatif

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP99202421 1999-07-22
EP99202421 1999-07-22
PCT/EP2000/006623 WO2001007212A2 (fr) 1999-07-22 2000-07-12 Tete de rasage a manipulateur de poils rotatif
EP00954484A EP1115538B1 (fr) 1999-07-22 2000-07-12 Tete de rasage a manipulateur de poils rotatif

Publications (2)

Publication Number Publication Date
EP1115538A2 EP1115538A2 (fr) 2001-07-18
EP1115538B1 true EP1115538B1 (fr) 2003-01-02

Family

ID=8240486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00954484A Expired - Lifetime EP1115538B1 (fr) 1999-07-22 2000-07-12 Tete de rasage a manipulateur de poils rotatif

Country Status (8)

Country Link
EP (1) EP1115538B1 (fr)
JP (1) JP2003534827A (fr)
CN (1) CN1319042A (fr)
AR (1) AR024892A1 (fr)
AT (1) ATE230332T1 (fr)
AU (1) AU6692700A (fr)
DE (1) DE60001093T2 (fr)
WO (1) WO2001007212A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1634681B1 (fr) 2002-10-08 2010-07-21 The Gillette Company Système de rasage pour accomplir des actions multiples de rasage
CN1890065B (zh) * 2003-12-10 2011-07-13 皇家飞利浦电子股份有限公司 具有皮肤舒展部件的剃头
JP5522715B2 (ja) * 2009-05-28 2014-06-18 日立マクセル株式会社 ロータリー式の電気かみそり
CN101879723B (zh) * 2010-07-12 2012-01-11 任向荣 剃须刀刀头
KR102028912B1 (ko) * 2018-06-07 2019-10-07 주식회사 도루코 면도기

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2568047A (en) 1948-09-30 1951-09-18 Harold C Anderson Safety razor
US2766521A (en) * 1952-08-28 1956-10-16 Benvenuti Giulio Razor with skin stretching means
CH355713A (de) * 1957-03-30 1961-07-15 Miller Hermann Trockenrasierer

Also Published As

Publication number Publication date
ATE230332T1 (de) 2003-01-15
WO2001007212A3 (fr) 2001-03-22
CN1319042A (zh) 2001-10-24
DE60001093D1 (de) 2003-02-06
EP1115538A2 (fr) 2001-07-18
AU6692700A (en) 2001-02-13
JP2003534827A (ja) 2003-11-25
DE60001093T2 (de) 2003-09-11
AR024892A1 (es) 2002-10-30
WO2001007212A2 (fr) 2001-02-01

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