EP0322072A1 - Tête rotative pour rasoir électrique à sec - Google Patents

Tête rotative pour rasoir électrique à sec Download PDF

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Publication number
EP0322072A1
EP0322072A1 EP88202960A EP88202960A EP0322072A1 EP 0322072 A1 EP0322072 A1 EP 0322072A1 EP 88202960 A EP88202960 A EP 88202960A EP 88202960 A EP88202960 A EP 88202960A EP 0322072 A1 EP0322072 A1 EP 0322072A1
Authority
EP
European Patent Office
Prior art keywords
shaving
rotary
plane
cap
knife
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.)
Withdrawn
Application number
EP88202960A
Other languages
German (de)
English (en)
Inventor
Leo Bertram
Hugo Dr. Schemmann
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
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 Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0322072A1 publication Critical patent/EP0322072A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a rotary shaving head for an electric dry shaver, which has a rotary knife driven by an electric motor, which consists of a knife plate, the edge of which is provided with a ring of individual knives bent from the plane of the plate, with their cutting edges with a Shear cap provided with hair passage slits interact along a cutting plane.
  • Rotary shaving heads of this type are known from DE-AS 11 21 506 and are in competing competition with vibrating shaving heads.
  • the advantage of the rotary shaving heads over the vibrating shaving heads is the ability to better capture and cut long hair.
  • the individual knives have contact surfaces which run along the cutting plane of the shaving cap, with cutting edges being provided at the front in the predetermined cutting direction.
  • the shaving head is thus set up for one rotation of the rotary knife.
  • a direction lock which blocks or blocks a drive in the opposite direction, ie a direction opposite to the cutting edge position of the individual knives.
  • the use of a directional lock makes the set-up operation possible, but has the disadvantage that the directional lock is an additional component and causes noises that can disturb a user.
  • the object is achieved according to the invention in that the rotary knife and the shaving cap are designed for one rotation of the rotary knife in both directions of rotation and the rotary knife can be driven by means of a single-phase synchronous motor with a permanent magnetic rotor.
  • a directional lock can be dispensed with in the case of a single-phase synchronous motor as the drive motor.
  • the construction of the apparatus is therefore economical because individual parts of the directional lock are saved.
  • the annoying noise caused by a direction lock is no longer there.
  • the single-phase synchronous motor has a small size, so that it can also be used to implement a small dry shaving device or the form designer is given a lot of freedom.
  • the webs between the hair passage slots perpendicular to the cutting plane are thicker than about 0.1 mm, preferably between 0.1 mm and 0.5 mm thick.
  • this rotary shaving head is also not designed as a single shaving head, with which a shave is to be completed alone; it is rather intended for a combination dry shaver that is also equipped with a vibration shaving head.
  • the hair that a vibrating shaving head does not catch on the neck or other problem areas is pre-cut safely and without irritation by the rotating shaving head with thicker blades. The trimming is then carried out using the vibrating shaving head.
  • FIG. 1a to 1e show a dry shaving apparatus with shaving head arrangements working in two different working planes A and B, namely a vibrating shaving head arrangement 1 and a rotating shaving head arrangement 2.
  • a base plate 3a which is shown in FIG Housing of the dry shaver is located.
  • the single-phase synchronous motor 3 has a U-shaped stator iron 4 and excitation coils 6 pushed onto the iron legs 5.
  • a permanent magnetic rotor 9 is rotatably mounted about a rotation axis 10 which is perpendicular to a wide plane 3b of the Apparatus runs. The rotor 9 can rotate in both directions of rotation.
  • a double cam 11 is flanged onto the rotor axis 10 and, via a rocker arm converter 12 and driver 16, has a vibration lower knife 17 in the direction of a Double arrow 18 can move back and forth.
  • the lower knife 17 works together with a film upper knife 19 which is arched over the lower knife 17.
  • the rotor 9 continues to drive a driver cage 21 via a bevel gear 20.
  • a driver bush 22 is axially displaceably mounted in the driver cage 21 and is secured against rotation relative to the driver cage.
  • a rotary knife 23 is placed on the driver bush 22 and can rotate in a lamellar knife cap 24.
  • the lamella webs 24a run radially to the circumferential axis 25 of the rotary knife arrangement 2.
  • the rocker arm converter 12 consists of a double-armed lever with a first lever arm 28 and a second lever arm 29.
  • the double-armed lever 28/29 is mounted so as to be capable of swinging about a bearing 30.
  • the first lever arm 28 carries a pressure roller 31 which can roll in a pressure bearing 32. Furthermore, the first lever arm 28 is pressed by means of a pressure spring 33 with its pressure roller 31 against the double cam 11. Further details of this rocker arm converter 12 are described in DE-PS 34 04 297.
  • the vibration knife arrangement 1 With the help of the rocker arm converter 12, the vibration knife arrangement 1 is brought into vibration movement via the second lever arm 29 and the driver 16.
  • the gear 20 used for this purpose consists of a gear 43 flanged onto the rotor axis 10, which can be seen particularly well from FIG. 1c.
  • This gear 43 meshes with a further gear 44.
  • This further gear 44 is fixedly connected to a bevel gear 37 (Fig. 1b and 1c).
  • another bevel gear 38 which is mounted in bearings 39, meshes with the bevel gear 37.
  • the shaft 40 of the second bevel gear 38 drives the driver cage 21 and, via this, the driver bush 22, which engages in the rotary knife 23, which rotates in the cap-shaped lamella upper knife 24.
  • the bevel gear construction which is difficult to see from FIG. 1a, can be seen from the view Ib and the section Ic according to FIG. 1a.
  • the rotary knife speed can be adjusted on the one hand by the gear arrangement of the transmission 20, on the other hand the rotary knife arrangement 2 can move closer to the vibration knife arrangement 1.
  • 1d and 1e show how the rotary knife arrangement 2 is arranged in a narrow side 3c of the apparatus in such a drive structure. This ensures good maneuverability when using the rotary knife assembly 2.
  • the rotary knife 23 is made from a base plate 54, of which individual knives 52 are bent out of the plane of the plate along its edge 23a.
  • the individual knives 52 are arranged in the manner of a ring along the edge 23a. It can be seen that the angle of inclination alpha of the center lines 51 of the individual knives 52 forms an angle of 90 ° with the plane 53 of the knife plate 54 and the cutting plane 55 of the shear cap 24 parallel thereto, the individual knives 52 being formed symmetrically in the circumferential direction to the center line 51 are. It is not necessary here for the side walls 159 to run parallel to the center line 56.
  • the center lines 56 of the individual hair passage slots 57 in the shaving cap 24 have a radial course.
  • the hair passage slots 57 are symmetrical in the circumferential direction with respect to the center lines 56.
  • Each individual knife 52 has a contact surface 58 which can be moved along the cutting plane 55 of the shaving cap 24 and which is delimited by two cutting edges 59 arranged opposite one another.
  • the cutting edges 59 extend symmetrically to the radially running center line 61 of the contact surfaces 58. In this way, the rotary knife 23 can rotate in any direction.
  • the webs 60 between the hair passage slots 57 have a thickness d of more than 0.1 mm perpendicular to the cutting plane 55.
  • the thickness d is preferably between 0.1 mm and 0.5 m.
  • the preferred speed of the rotary knife 23 is 2000 rpm.
  • Fig. 3 shows within an indicated housing 13, the arrangement of a single-phase synchronous motor 3 'modified design. Excitation coils 5 'are pushed onto the U-shaped stator iron 4'. On the free ends of the stator iron 4 ', a drive part 62 is placed, which consists of a plastic bezel 63, in which pole iron leg parts 64 are located, which comprise the rotor 65 of the two-pole single-phase synchronous motor 3' between their pole shoes. The shaft 66 of the rotor 65 is supported in the plastic housing 63 in bearings, not shown. Another bearing 67 is located outside the engine. Further details of this motor construction can be found in DE-OS 34 23 777 (PHD 84-098).
  • the shaft 66 acts on the driver cage 21, in which the driver bush 22 is axially displaceable but is secured against rotation.
  • the driver bush 22 engages on the rotary knife 23, which rotates in the shaving cap 24 according to FIGS.
  • the slat thickness d 1 is set to a thickness between 0.05 mm and 0.1 mm.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
EP88202960A 1987-12-23 1988-12-19 Tête rotative pour rasoir électrique à sec Withdrawn EP0322072A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3743735 1987-12-23
DE19873743735 DE3743735A1 (de) 1987-12-23 1987-12-23 Rotations-scherkopf fuer einen elektrischen trockenrasierapparat

Publications (1)

Publication Number Publication Date
EP0322072A1 true EP0322072A1 (fr) 1989-06-28

Family

ID=6343379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202960A Withdrawn EP0322072A1 (fr) 1987-12-23 1988-12-19 Tête rotative pour rasoir électrique à sec

Country Status (4)

Country Link
US (1) US4979297A (fr)
EP (1) EP0322072A1 (fr)
JP (1) JPH01204690A (fr)
DE (1) DE3743735A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652087A1 (fr) * 1993-11-05 1995-05-10 Koninklijke Philips Electronics N.V. Rasoir électrique

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD391022S (en) 1996-08-19 1998-02-17 Braun Aktiengesellschaft Dry shaver
USD413182S (en) 1997-11-26 1999-08-24 U.S. Philips Corporation Beard trimmer
USD433533S (en) * 1999-06-08 2000-11-07 U.S. Philips Corporation Electric shaver
ES2621131T3 (es) * 2004-11-01 2017-07-03 Koninklijke Philips N.V. Unidad cortadora para afeitadora rotativa y afeitadora rotativa provista de la misma
US9027251B2 (en) * 2009-04-29 2015-05-12 Spectrum Brands, Inc. Rotary electric shaver
US10279492B2 (en) 2014-04-18 2019-05-07 Koninklijke Philips N.V. Coupling mechanism for a drive train of a hair cutting appliance
EP3524396B1 (fr) * 2018-02-08 2020-12-02 BIC Violex S.A. Rasoir rotatif

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US30857A (en) * 1860-12-04 1860-12-04 Superheating steam fob locomotive-engines
US3229366A (en) * 1963-09-19 1966-01-18 Strezoff Bogoia Dry shaving device
FR2409836A1 (fr) * 1977-11-28 1979-06-22 Philips Nv Rasoir
DE3610771C1 (de) * 1986-03-29 1987-09-03 Philips Patentverwaltung Vorrichtung zur Gleichlaufverbesserung der Umlaufbewegung des Rotors eines Einphasensynchronmotors

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL101486C (fr) * 1959-05-19
JPS59228886A (ja) * 1983-06-10 1984-12-22 松下電工株式会社 電気かみそり
NL8400887A (nl) * 1984-03-21 1985-10-16 Philips Nv Scheerapparaat.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US30857A (en) * 1860-12-04 1860-12-04 Superheating steam fob locomotive-engines
US3229366A (en) * 1963-09-19 1966-01-18 Strezoff Bogoia Dry shaving device
FR2409836A1 (fr) * 1977-11-28 1979-06-22 Philips Nv Rasoir
DE3610771C1 (de) * 1986-03-29 1987-09-03 Philips Patentverwaltung Vorrichtung zur Gleichlaufverbesserung der Umlaufbewegung des Rotors eines Einphasensynchronmotors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652087A1 (fr) * 1993-11-05 1995-05-10 Koninklijke Philips Electronics N.V. Rasoir électrique
BE1007710A3 (nl) * 1993-11-05 1995-10-03 Koninkl Philips Electronics Nv Scheerapparaat.

Also Published As

Publication number Publication date
DE3743735A1 (de) 1989-07-13
US4979297A (en) 1990-12-25
JPH01204690A (ja) 1989-08-17

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