EP0375949B1 - Elektrischer Trockenrasierapparat mit einem bewegbaren Scherkopfsystem - Google Patents

Elektrischer Trockenrasierapparat mit einem bewegbaren Scherkopfsystem Download PDF

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Publication number
EP0375949B1
EP0375949B1 EP89121739A EP89121739A EP0375949B1 EP 0375949 B1 EP0375949 B1 EP 0375949B1 EP 89121739 A EP89121739 A EP 89121739A EP 89121739 A EP89121739 A EP 89121739A EP 0375949 B1 EP0375949 B1 EP 0375949B1
Authority
EP
European Patent Office
Prior art keywords
shaving
shaving head
housing
axis
bearing shell
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
EP89121739A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0375949A2 (de
EP0375949A3 (de
Inventor
Werner Messinger
Karl Trölltsch
Bernd Tewes
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.)
Braun GmbH
Original Assignee
Braun GmbH
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 Braun GmbH filed Critical Braun GmbH
Publication of EP0375949A2 publication Critical patent/EP0375949A2/de
Publication of EP0375949A3 publication Critical patent/EP0375949A3/de
Application granted granted Critical
Publication of EP0375949B1 publication Critical patent/EP0375949B1/de
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
    • 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
    • B26B19/146—Complete cutting head being movable
    • 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 an electric dry shaving apparatus with a housing, a movably mounted shaving head, in which at least one shaving system is provided with a circular upper knife and a rotating lower knife, the axis of rotation of which is aligned at right angles to a shear plane running parallel to the outer surface of the upper knife, and with a shaving head symmetry axis intersecting the shear plane at the geometric center of the surface of the shear system (s) provided.
  • a dry shaving apparatus is known with a housing and a movably mounted shaving head, in which a shaving system is provided with a circular upper knife and a rotating lower knife assigned to it, the axis of rotation of which is perpendicular to a parallel to the outer surface of the upper knife Shear plane is aligned.
  • the housing of the shaving head is partially designed as a spherical head, which is pivotally mounted in a spherical housing shell around a pivot point lying on the axis of rotation of the lower knife. The pivot point of the shaving head lies in the center of the spherical housing shell and thus far below the shear plane formed by the upper knife.
  • An electric shaver with a shaving head is already known (EP-A-0 176 128), in which two or three rotating shaving systems are arranged.
  • the shaving head according to FIGS. 7 and 8 is around a fixed shaving head axis of symmetry which runs through the geometric surface center of the three intended shaving systems rotatably mounted so that the position of the shaving plane running parallel to the outer surface of the upper blades of the shaving systems relative to the razor housing is not changed.
  • 9 is mounted between support arms provided on the shaver housing.
  • the pivot axis of the shaving head is provided relatively far below the shear plane of the rotating shear systems.
  • an electric shaver is known with a housing and a shaving head system provided thereon, which consists of a shaving head frame and two arched shaving heads provided therein, running parallel to one another.
  • the shaving head system is pivotally mounted on the housing of the shaving apparatus about an axis running parallel to the shaving heads, which intersects a tangent tangent to the shaving heads in the middle of the distance between the points of contact of the tangent with the two shaving heads.
  • the invention has for its object to arrange the shaving head of a razor such that the entire angle at normal angles of its housing to the skin surface a shaving surface that can be used for a shave comes into contact with the skin surface and that the shaving surface or part of the usable shaving surface or a part of the usable shaving surface is prevented from tilting away from the skin surface when the shaving head is subjected to changing loads or shifting directions.
  • the entire usable shaving surface regardless of the pressure forces acting on it, should follow the skin contour without further ado in order to ensure a perfect shave.
  • this object is achieved in a device of the type mentioned at the outset in that the geometric center of the surface is provided as a stationary pole for the shaving head symmetry axis which can be moved in any direction with the shear plane.
  • This mounting of the shaving head ensures that the shaving surfaces of the shaving system (s) provided are automatically moved in the form of a shaving plane to the skin surface and remain there, irrespective of the pressing forces acting on this shaving plane and changing shifting directions of the shaving plane, within the normal normal setting angle of the shaving head to the skin surface Shaving head over the surface of the skin.
  • a particular advantage of this balanced shaving head bearing is that the respective pressure forces exerted on the handle of the razor are evenly distributed over the effective shaving surfaces after the shaving plane is in contact with the skin surface. Since the pole of the shaving head and thus of the intended shaving system (s) lies in the geometric center of the area of the intended shaving surfaces, the shaving head system can oscillate very easily and thus directly follow the skin surface.
  • the shear plane and the shaving head axis of symmetry can be moved about three spatial axes running through the pole and oriented at right angles to one another.
  • the joint movement of the shaving plane and the shaving head axis of symmetry can expediently be limited by means of stops provided on the shaving head and on the housing.
  • the shaving head is provided in a housing which is at least partially designed as a spherical shell, which is pivotably mounted in a bearing shell designed in the housing of the shaving apparatus, in the form of a spherical cap.
  • the common center of the radii of the spherical shell and the bearing shell lies in the pole.
  • the coupling part is preferably provided with ribs and blocks crossing at right angles, wherein the coupling part can be mounted on the concave side of the spherical shell and, with its blocks, penetrating correspondingly dimensioned recesses in the spherical shell, engages in guides of the bearing shell.
  • an expedient development of the invention provides only a form-fitting guidance between the shaving head and the housing.
  • the shaving system 1 shows an electric dry shaving apparatus 1 with a housing 2 serving as a handle and a shaving head 4 which can be moved about a stationary pole 3 and in which three shaving systems 5 are provided, two of which can be seen from the illustration.
  • the shaving systems 5 each consist of a circular upper knife 6 and associated rotating lower knives 7, the axes of rotation 8 of which are aligned at right angles to the shear plane E formed by the outer surfaces 9 of the upper knives 6.
  • the fixed pole 3 lies in the embodiment 1 at the level of the shear plane E, the exact position in the shear plane E being determined by the geometric center of the surface of the shear systems 5 provided, as is explained in more detail under FIG. 2.
  • the shaving head symmetry axis 10 intersecting the shear plane E at right angles runs through the pole 3 and, together with the shear plane E, executes all pivoting movements of the shaving head 4 around the stationary pole 3.
  • This swiveling or tumbling movement of the shaving head 4 around the stationary or stationary pole 3 can also be described as a swiveling movement around three spatial axes x, y, z which are oriented at right angles to one another and pass through this pole 3, the central position of the shaving head 4 , ie in the non-swung-out position, the spatial axes x and y lie in the shear plane E and the spatial axis z coincides with the shaving head axis of symmetry 10; the shaving head 4 therefore has three degrees of freedom.
  • the housing 11 of the shaving head 4 is at least partially formed, namely on the housing side opposite the outer surface 9, as a spherical shell 12 which is movably supported in any direction in a bearing shell 13 provided in the housing 2 and in the form of a spherical cap.
  • the common center of the radius R1 of the spherical shell 12 and the radius R2 of the bearing shell 13 is in the pole 3rd
  • an electric motor 15 is fastened to a holder 14, which is coupled via a gear 16 to the lower knives 7 of the shear systems 5 provided, in order to set them in a rotational movement after the motor has been started up.
  • the motor 15, which is arranged centrally in the shaving head 4 in relation to the shaving head axis of symmetry 10, protrudes from the housing 11 and into the housing 2 through an opening 17 provided centrally to the center of the spherical cap-shaped bearing shell 13.
  • the engine is surrounded by a plate-shaped slide bearing part 18, which is held on the convex wall 19 of the bearing shell 13 facing the interior of the housing 2 by means of a sleeve 20 which can be screwed onto the motor 15 in a slidable manner.
  • the shaving head 4 is thus slidably attached to the housing 2 via the motor 15, the slide bearing part 18 and the bearing part 13.
  • the opening diameter of the opening 17 and thus of the shaving head 4 is larger than the outer diameter of the motor 15.
  • the edge of the opening 17 serves as a stop 21 to limit the freedom of movement of the motor 15 within the opening 17.
  • the size of the opening 17 is such that, starting from the central position of the shaving head 4, in which the shaving head axis of symmetry 10 through both the center of the Opening 17 as well as through the pole 3, the shaving head axis of symmetry 10 together with the shear plane E, an angular movement ⁇ around the fixed pole 3 in any direction, ie can perform a wobble movement up to approximately 20 ° around the pole 3, as indicated by the circle K around the spatial axis Z.
  • a seal 22 is provided between the spherical shell 12 and the bearing shell 13, preferably in the region of the outer edge thereof, which is made of plastic or a ceramic material and additionally the bearing function of the bearing shell 13 can also take over the function as a seal. Furthermore, the friction between the two components and the choice of the pressing force by means of the sleeve 20, the smoothness and damping of movement of the movable shaving head 4 can be adjusted by choosing the suitable materials of the spherical shell 12 or the seal 22.
  • the three shear systems 5 are arranged on the outer surface 9 of the shaving head 4 in such a way that the three drive axes 8 lie in the corners of an isosceles triangle, the center of area of which is identical to the stationary pole 3 as the geometric center of the area.
  • the shaving head axis of symmetry 10 which is perpendicular to the shear plane E and, when the shaving head 4 is in the central position, also the spatial axis z.
  • the spatial axes x and y lying in the shear plane E are entered.
  • the shaving head 4.3 has only one shaving system 5.
  • the pole 3 is at the same time the center of the surface of the shaving head 4.3, and through it - perpendicular to the plane of the drawing, which also represents the shearing plane E - the shaving head axis of symmetry 10 and the spatial axis z.
  • the spatial axes x and y lie in the shear plane E and go through the pole 3; the axis of rotation 8 of the shear system 5 also passes through it.
  • the shaving head 4.5 has four shaving systems 5, the axes of rotation 8 of which are arranged in the corners of a square standing on the top.
  • the center of the area lies at the intersection of the diagonals of the square, which here are identical to the spatial axes x - y, and is also the pole 3 through which the spatial axis z and the shaving head axis of symmetry 10 - perpendicular to the plane of the drawing - pass.
  • the shaving head 4.6 also has four shaving systems 5, the axes of rotation 8 of which are arranged in the corners of a square, in the center of whose surface the pole 3, the shaving head axis of symmetry 10 and the vertical spatial axis z lie, but in the manner that the spatial axes x and y going through the pole 3 are directed parallel to the sides of the square.
  • the electric dry shaving apparatus 1.7 according to FIG. 7 is of a similar construction to that shown in FIG. 1; it has a housing 2.7 serving as a handle, a shaving head 4.7 provided with the rotating shaving systems 5 and an electric motor 15.7 mounted therein.
  • the shear plane E is also defined here as the outer surface 9 of the shear systems 5.
  • the shaving head axis of symmetry 10 penetrates the shear plane E in the stationary pole 3, through which the spatial axes x and y lying in the shear plane E go even when the shaving head 4.7 is in the middle (FIG. 9 ).
  • the shaving head 4.7 is also formed on its side opposite the shear plane E in the manner of a spherical shell 12.7, which, as in the exemplary embodiment according to FIG.
  • the centerpiece of these guides is a coupling part 23, which has on its longitudinal sides 24 two parallel ribs 25 and 26, on the center of which, transversely to this, are placed two blocks 27 and 28 which project outwards and which act as Guide elements transverse to the guide direction of the ribs 25 and 26 are used.
  • a cutout 29 for the motor 15.7 which is dimensioned such that it closely encloses the motor with the longitudinal sides 24, ie parallel to the ribs 25 and 26, while between the transverse sides 30, ie parallel to the blocks 27 and 28 and the corresponding dimensions of the motor 15.7 a game is provided which allows a relative movement of the motor 15.7 relative to the coupling part 23 within the selected pivoting movement of the shaving head 4.7.
  • a central recess 31 with the dimensions of the motor cross section (see FIG. 8) and slot-like recesses 32, 33 for the ribs 25, 26 and recesses 34, 35 for the blocks 27, 28 are provided. 9 shows these relationships in a top view with a view of the concave side of the spherical shell 12.7 when the coupling part 23 is inserted in a schematic representation.
  • the bearing shell 13.7 of the housing 2.7 there is a central recess 36 for the motor 15.7, which has such an excess compared to its cross-sectional dimensions that the motor 15.7 can move freely in the direction of the x- and y-space axes when the shaving head is pivoted .
  • This recess 36 is adjoined on both sides - as shown in FIG. 9 - in the middle of its longitudinal edges by recesses 37 and 38 (FIG. 8) which are made transversely to the direction of the ribs 25 and 26.
  • the blocks 27, 28 engage in these recesses 37 and 38 for the purpose of guiding the pivoting movement of the shaving head 4.7 about the y-spatial axis. Its length is determined according to the chosen dimension of the swing movement.
  • the coupling part 23 is pushed onto the motor 15.7 before it is fastened in the shaving head 4.7 until the ribs 25, 26 engage in their recesses serving as guides and the blocks 27, 28 engage through the recesses 34, 35 in order to engage them assigned, serving as a guide recesses 37, 38 come to rest in the bearing shell 13.7.
  • a sleeve 39 which can be screwed onto the motor 15.7 and presses against the convex side of the bearing shell 13.7 via a slide bearing part 40.
  • the narrow sides of the slot-like recesses serve as stops for limiting the pivoting movements of the shaving head.
  • a pivoting movement is provided only about a spatial axis passing through the pole 3, the x-axis.
  • the movements around the y and z spatial axes are blocked.
  • the structural design otherwise corresponds to the exemplary embodiment in FIG. 1.
  • the pole 3 lies at the point of intersection of the shaving head axis of symmetry 10 with the shear plane E, which is determined by the surface of the shear systems 5.
  • the electric motor 15 for driving the shaving systems 5 is fastened in the shaving head 4 and penetrates the underside of the shaving head 4, which is designed as a spherical shell 12, in the recess 41 and the spherical cap-shaped bearing shell 13 of the housing 2 in the recess 42; this is widened in the pivoting direction of the shaving head 4 and thus of the motor 15 by such an amount compared to the cross-sectional dimensions of the motor 15 that the motor 15 can move freely in this direction.
  • the motor 15 is surrounded by a plate-like slide bearing part 18, which is held by a sleeve 20 that can be screwed onto the motor 15 in slidable contact with the convex side of the bearing shell 13.
  • a seal 22 is provided between the shaving head 4 and the housing 2.
  • the radii R1 of the spherical shell 12 and R2 of the bearing shell 13 have their common starting point in pole 3.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
EP89121739A 1988-12-24 1989-11-24 Elektrischer Trockenrasierapparat mit einem bewegbaren Scherkopfsystem Expired - Lifetime EP0375949B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3843936 1988-12-24
DE3843936A DE3843936C1 (enrdf_load_stackoverflow) 1988-12-24 1988-12-24

Publications (3)

Publication Number Publication Date
EP0375949A2 EP0375949A2 (de) 1990-07-04
EP0375949A3 EP0375949A3 (de) 1991-07-10
EP0375949B1 true EP0375949B1 (de) 1994-09-21

Family

ID=6370290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89121739A Expired - Lifetime EP0375949B1 (de) 1988-12-24 1989-11-24 Elektrischer Trockenrasierapparat mit einem bewegbaren Scherkopfsystem

Country Status (6)

Country Link
US (1) US5007168A (enrdf_load_stackoverflow)
EP (1) EP0375949B1 (enrdf_load_stackoverflow)
JP (1) JP2667267B2 (enrdf_load_stackoverflow)
AT (1) ATE111798T1 (enrdf_load_stackoverflow)
DE (2) DE3843936C1 (enrdf_load_stackoverflow)
ES (1) ES2061899T3 (enrdf_load_stackoverflow)

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WO2018205081A1 (zh) * 2017-05-08 2018-11-15 浙江美森电器有限公司 一种剃须刀
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EP3546151B1 (en) 2018-03-27 2025-04-30 Braun GmbH PERSONAL CARE DEVICE
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KR102594739B1 (ko) * 2018-07-26 2023-10-25 썬전 수카스 테크놀로지 컴퍼니 리미티드 결합구조 및 면도장치
WO2020029014A1 (zh) * 2018-08-06 2020-02-13 舒可士（深圳）科技有限公司 一种剃须刀
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Also Published As

Publication number Publication date
DE3843936C1 (enrdf_load_stackoverflow) 1990-05-31
ATE111798T1 (de) 1994-10-15
EP0375949A2 (de) 1990-07-04
US5007168A (en) 1991-04-16
EP0375949A3 (de) 1991-07-10
DE58908409D1 (de) 1994-10-27
JPH02213378A (ja) 1990-08-24
JP2667267B2 (ja) 1997-10-27
ES2061899T3 (es) 1994-12-16

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