EP0124171A2 - Rasierapparat - Google Patents

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Info

Publication number
EP0124171A2
EP0124171A2 EP84200568A EP84200568A EP0124171A2 EP 0124171 A2 EP0124171 A2 EP 0124171A2 EP 84200568 A EP84200568 A EP 84200568A EP 84200568 A EP84200568 A EP 84200568A EP 0124171 A2 EP0124171 A2 EP 0124171A2
Authority
EP
European Patent Office
Prior art keywords
cutting member
cutter
extends
arm
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.)
Granted
Application number
EP84200568A
Other languages
English (en)
French (fr)
Other versions
EP0124171B1 (de
EP0124171A3 (en
Inventor
Eduard Willem Tietjens
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
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Priority to AT84200568T priority Critical patent/ATE40659T1/de
Publication of EP0124171A2 publication Critical patent/EP0124171A2/de
Publication of EP0124171A3 publication Critical patent/EP0124171A3/en
Application granted granted Critical
Publication of EP0124171B1 publication Critical patent/EP0124171B1/de
Expired 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
    • 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 invention relates to a shaving apparatus having a rotatably drivable first cutting member with a central part which carries cutters each formed substantially by a blade at one end of a cutter arm which extends at least partly in a radial direction with respect to the axis of rotation of the first cutting member and the other end of which is connected to said central part, and comprising a second cutting member having a wall which comprises hair -entry apertures and over which wall the blades are movable.
  • Such a shaving apparatus is known, for example, from Netherlands Patent Application 7217486 (PHN 6638; US-PS 3,890,705).
  • each cutter arm or the radially extending part thereof is constructed as a leaf spring which his substantially in a plane which is inclined with respect to the axis of rotation so that in the direction of width the arm or said part thereof extends sustantially according to a helical line extending both axially towards the second cutting member and in the derection of rotation.
  • the first cutting member 1 in Figs. 1 to 3 is rotatable around an axis 2 with respect to the second cutting member 3.
  • the cutting member 3 comprises a wall 4 having hair-entry apertures 5.
  • the cutters 6 of cutting member 1 comprise blades 7 at the ends of cutter arms 8 extending radially with respect to the axis of rotation 2.
  • the other ends of the cutter arms 8 are connected to a central part 9 of the cutting member 1.
  • the central part 9 comprises a sleeve 10 with which the cutting member 1 is secured to the shaft 11.
  • the cutting members 1 and 3 are components of a shaving apparatus , the remainder of which, for simplicity, is not shown in the drawings.
  • the cutting member 1 is driven in known manner, for example, by means of an electric motor coupled to the shaft 11. When a hair protrudes through a hair-entry aperture 5, it will be cut off by a cutter blade 7 in cooperation with the second cutting member 3.
  • the arms 8 are resiliently flexible so that with a slight deflection of said arms the cutter blades 7 press against the wall 4 of the second cutting member 3 with a small force. Because of the resilience of the arms 8 there is no need for separate resilient elements for urging cutting member 1 against cutting member 3. It is essential that the force exerted per blade be kept as small as possible because the overall force exerted between the two cutting members is the sum of the forces exerted by all the cutters, and in order to minimize mean and energy loss by friction.
  • each arm 8 By constructing each arm 8 as a leaf spring extending radially with respect to the axis of rotation 2 and which is flexible in directions perpendicular to the cutting edge of the blade and rigid in directions parallel to the cutting edge of the blade, a construction in which small forces are exerted by the cutter blades on the second cutting member can be obtained in a simple manner. However, it is necessary to prevent a cutter blade being moved away from the second cutting member too rapidly by the forces occurring during cutting, since this would adversely affect the cutting action.
  • each cutter arm 8 which as already mentioned is in the form of a leaf spring, lies substantially in a plane which is inclined with respect to the axis of rotation 2 so that in the direction of width the arm extends substantially according to a helical line which extends according to the arrow P both in the axial direction towards the second cutting member and in the direction of rotation.
  • each cutter blade 7 is arranged in the same inclined plane as the associated cutter arm 8.
  • each cutter arm 8 encloses an acute angle ⁇ , for example 30 0 , with the portion of the wall 4 of the second cutting member 3 which is immediately to the rear of the associated cutter blade with respect to the direction of movement P (Fig. 3).
  • the angle ⁇ is so chosen that in most cases will be larger than the angle ⁇ which the cutting force K makes with said wall portion when the cutter blade 7 meets a hair 12.
  • the cutting force K may be decomposed into a component K 1 extending across the cutter blade and a component K 2 at right angles thereto.
  • Each cutter arm 8 will have considerable stiffness in the direction of component K 1 so that the deflection of the arm in this direction will be small. As a result of the low stiffness in the direction of component K 2 ,this component of the force K will keep the cutter blade 7 urged against the wall 4 during the cutting the hair 12, which is the best position for cutting the hair.
  • the first cutting member 1, comprising the central part 9, the cutter arms 8 and the cutter blades 7, is preferably manufactured as a single component from one piece of sheet material.
  • the cutter blades 7 are individually resiliently supported, they will become disengaged from the wall 4 due to un- evenesses in the surface of said wall less rapidly than if the cutter blades were to form a rigidly assembly with the cutter arms and the central part 9. As a result of this, less stringent accuracy requirements need be imposed upon the manufacture of the second cutting member, so that said component can also be manufactured more scheaply without this being at the expense of the action of the cutting members.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
EP84200568A 1983-04-27 1984-04-19 Rasierapparat Expired EP0124171B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84200568T ATE40659T1 (de) 1983-04-27 1984-04-19 Rasierapparat.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8301481 1983-04-27
NL8301481A NL8301481A (nl) 1983-04-27 1983-04-27 Scheerapparaat.

Publications (3)

Publication Number Publication Date
EP0124171A2 true EP0124171A2 (de) 1984-11-07
EP0124171A3 EP0124171A3 (en) 1985-11-13
EP0124171B1 EP0124171B1 (de) 1989-02-08

Family

ID=19841765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200568A Expired EP0124171B1 (de) 1983-04-27 1984-04-19 Rasierapparat

Country Status (7)

Country Link
EP (1) EP0124171B1 (de)
JP (1) JPS59207180A (de)
AR (1) AR230804A1 (de)
AT (1) ATE40659T1 (de)
BR (1) BR8401936A (de)
DE (1) DE3476640D1 (de)
NL (1) NL8301481A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8037613B2 (en) * 2004-09-02 2011-10-18 Rovcal, Inc. Shaving head for rotary shaver and method of manufacturing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB602186A (en) * 1941-05-06 1948-05-21 Marcel Jay Improvements in electric razors
GB639298A (en) * 1948-03-01 1950-06-28 Kooperativa Forbundet Forening Motor-driven dry shaver
US2720696A (en) * 1954-01-29 1955-10-18 Sanford I Wadsworth Electric shaver
JPS5365161A (en) * 1976-11-24 1978-06-10 Matsushita Electric Works Ltd Rotary electric razor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB602186A (en) * 1941-05-06 1948-05-21 Marcel Jay Improvements in electric razors
GB639298A (en) * 1948-03-01 1950-06-28 Kooperativa Forbundet Forening Motor-driven dry shaver
US2720696A (en) * 1954-01-29 1955-10-18 Sanford I Wadsworth Electric shaver
JPS5365161A (en) * 1976-11-24 1978-06-10 Matsushita Electric Works Ltd Rotary electric razor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN; & JP - A - 53 65161 (MATSUSHITA DENKO K.K.) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8037613B2 (en) * 2004-09-02 2011-10-18 Rovcal, Inc. Shaving head for rotary shaver and method of manufacturing the same

Also Published As

Publication number Publication date
ATE40659T1 (de) 1989-02-15
AR230804A1 (es) 1984-07-31
DE3476640D1 (en) 1989-03-16
NL8301481A (nl) 1984-11-16
EP0124171B1 (de) 1989-02-08
EP0124171A3 (en) 1985-11-13
JPS59207180A (ja) 1984-11-24
BR8401936A (pt) 1984-12-04

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