EP1235666A1 - Hair trimming system - Google Patents
Hair trimming systemInfo
- Publication number
- EP1235666A1 EP1235666A1 EP00954578A EP00954578A EP1235666A1 EP 1235666 A1 EP1235666 A1 EP 1235666A1 EP 00954578 A EP00954578 A EP 00954578A EP 00954578 A EP00954578 A EP 00954578A EP 1235666 A1 EP1235666 A1 EP 1235666A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting blade
- cutting
- long hair
- curvature
- arch
- 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
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
- B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
- B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
- B26B19/10—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving two or more different types of reciprocating cutting elements, e.g. a pair of toothed shearing elements combined with a pair of perforated cutting elements or a combined toothed and perforated cutting assembly
Definitions
- the invention relates to a long hair trimmer of the type specified in the preamble of claim 1.
- a long hair cutting system of the type mentioned is known from DE 38 19 055 C2.
- a hardened cutting blade is ground flat on one or both sides while maintaining a constant cutting blade thickness. Due to the grinding of the rolling skin of the cutting blade, a material distortion occurs in the form of a curvature after the cutting blade has been removed from the grinding device. This arbitrary curvature of the cutting blade precludes optimal interaction with the tread of a dimensionally stable cutting comb.
- a pressure lip which acts on the cutting blade and is made of a material which can be deformed both elastically and plastically is provided.
- the invention has for its object to provide a long hair trimmer of the type mentioned, in which an optimal installation of cutting comb and cutting blade is guaranteed in the assembled state.
- a major advantage of the solutions according to the invention is that an individual adaptation of the contact surface of the reciprocating cutting blade can be produced with respect to the running surface of a cutting comb.
- There are two different manufacturing methods available for producing the curvature of a cutting blade which force the cutting blade onto the cutting edge or curvatures required in each case without removing material from the cutting blade, in such a way that an adjustment is made while ensuring the required restoring force or the elasticity of the curved cutting blade and slidable contact of the cutting surface of the cutting blade with the running surface of the cutting comb is ensured.
- a preferred embodiment of the invention is characterized in that the curvature of the contact surface of the cutting blade is determined by a sequence of curved elements of the same and different curvature, the transitions connecting the curved elements as bending points of the cutting blade for adapting the contact surface of the cutting blade to the shape of the Tread of the cutting comb are provided under the influence of the pressure of the spring element.
- an effective adaptation of the contact surface on the cutting blade to the shape of the running surface of the cutting comb is already ensured with a division of the longitudinal extension of the cutting blade into at least three arch elements.
- at least two curvatures with matching radii and one curvature with a different radius should preferably be provided.
- the adaptation of the contact surface of the cutting blade to the shape of the running surface of the cutting comb is favored in that the curvature with the deviating radius is provided between two curvatures with the same radii.
- the curvature of the contact surface of the cutting blade is determined by a sequence of curved elements of the same curvature, the transitions connecting the curved elements as bending points of the cutting blade for adapting the contact surface of the cutting blade to the shape of the tread of the Cutting comb are provided under the influence of the pressure of the spring element.
- This embodiment is particularly suitable for cutting blades, the contact surface of which is arranged on a flat or slightly concave or slightly convex running surface of a cutting comb.
- this embodiment is particularly suitable for contacting the running surfaces of cutting combs which, due to the manufacturing process, have deviations in the surface properties of the running surface.
- the longitudinal extent of the cutting blade is divided into arch elements by at least two bending points.
- At least two rows of bending points are provided parallel to a longitudinal extension of the cutting blade.
- the width of the cutting blade is divided into arch elements by at least one bending point. This measure favors the pressure of the contact surface of the cutting blade against the running surface of the cutting comb under the influence of the pressure of at least one spring element.
- the bending point is formed by a continuous, continuous adaptation of the curvature of an arch shape of an arch element with the curvature of the arch shape of the adjoining arch element. This adaptation prevents kinking in the course of the curvature of the cutting blade.
- a preferred embodiment of the invention is characterized in that at least two spring elements are provided, such that the distance of one spring element to one end of the cutting blade equals the distance of the other spring element to the other. is the end. In a further embodiment of this embodiment it is provided that the distance between the spring elements to one another is substantially equal to the distance between a spring element and one end of the cutting blade. This measure favors the deformation of the curvature of the cutting blade to the cutting comb while maintaining its restoring force or elasticity and brings about a balanced contact and sliding behavior of the cutting blade on the cutting comb.
- An advantageous embodiment of the invention is characterized in that the direction of the pressure which can be exerted by a spring element is essentially aligned with a bending point. This favors the change in shape of the respective curvatures of the cutting blade adjoining the bending point. Optimal contact and cutting behavior of the cutting comb and cutting blade is ensured by the fact that the hardened cutting blade provided with bending points has an elasticity or restoring force which counteracts a permanent change in shape of the curvature of the cutting blade under the influence of the pressure of the spring element.
- the arch shape and the bending points of the arch elements of the cutting blade can be produced by embossing by means of an embossing stamp and embossing pad.
- Another manufacturing method for the cutting blade is characterized in that the arch shape and the bending locations of the arch elements of the cutting blade can be produced by changing the compressive stress of the rolled skin of the hardened blade. This method has the advantage that the contact surface of the cutting blade can be partially and individually changed in such a way that partial and both equal and different compressive stresses are generated in the rolled skin of the hardened cutting blade, which lead to the same and different curvatures of the cutting blade.
- the compressive stress of the rolled skin is preferably used by means of a laser beam of constant pulse energy as well as variable pulse energy in order to achieve the compressive stress required at the respective location on the contact surface of the cutting blade and, consequently, curvature.
- Fig. 2 shows the front of a long hair cutting system, the components of which on a
- Support plate are arranged,
- FIG. 3 shows a longitudinal section E-E through the long hair cutting system according to FIG. 2,
- FIG. 4 shows a longitudinal section K-K through the long hair cutting system according to FIG. 2,
- Fig. 7 is a schematic representation of cutting comb and cutting blade with through
- FIG. 12 is a perspective view of a cutting blade with a view of the broad side of the cutting blade
- FIG. 13 is a perspective view of the cutting blade of FIG. 12 with a cross section through the center of the cutting blade.
- 1 shows a dry shaving apparatus TR with a housing 1, in the front of which an actuating switch 2 and an adjustable long hair cutting system LHS are arranged.
- a device socket 3 is arranged for connecting a power supply cable.
- a shaving head is provided on the housing 1, in the housing part G of which an interchangeable frame WR with at least one cutting element S is removably fastened.
- the housing part G of the shaving head is coupled to two support elements 4 and 5.
- the support elements 4 and 5 are mounted together with the housing part G in the arrow directions P to move back and forth in the housing 1.
- Fig. 2 shows the front of a long hair cutting system LHS, the components of which are arranged on a support plate 10.
- a substantially L-shaped, dimensionally stable cutting comb 11 is fastened to the support plate 10.
- a cutting blade 12 is assigned to the cutting comb 11 and is arranged on a support body 13 with a molded-in coupling element 14.
- a drive element 15 engages in the coupling element 14, which is mounted in an oscillatable manner, for example, via a pivot bearing 16 provided on the support plate 10.
- the course of a sectional view K-K and a further sectional view E-E are shown in dash-dot lines in the illustration of the embodiment according to FIG. 2, the details of which can be seen from FIGS. 3 and 4.
- FIG. 3 shows the longitudinal section E-E according to FIG. 2 running through the center of the long hair cutting system LHS.
- the substantially U-shaped cutting comb 11 is fastened to the inside of the support plate 10.
- the drive element 15, which is pivotably mounted by means of a pivot bearing 16, is in engagement with the coupling element 14 provided on the supporting body 13 with the end facing the cutting comb 11.
- the cutting blade 12 is fastened on the supporting body 13.
- the contact surface 120 of the cutting blade 12 is on the one hand with the cutting tooth row 18 in contact with the cutting tooth row 17 of the cutting comb 11 and on the other hand in contact with the sliding surfaces 27 - which are separated by a recess 28 - opposite to the cutting tooth row 17 on the cutting comb 11 and together with the row of cutting teeth 17 form the tread 110 of the cutting comb 11.
- FIG. 4 shows a vertical section KK through the long hair cutting system LHS, from which in particular the transmission of the pressure of the spring element 19 to the cutting blade 12 - see FIG. 2 - can be seen.
- the spring element 19 is provided on the support plate 10. see holding elements 21 guided and held.
- a pressure element 23 formed on the support plate 10 by means of a film hinge transmits the pressure of the spring element 19 to the support body 13.
- FIG. 5 shows a view of the side of the cutting comb 11 receiving the cutting blade 12.
- the row of cutting teeth 17 On the inside of the cutting comb 11, below the row of cutting teeth 17 - only a few cutting teeth of which are shown - two sliding surfaces 27 on the rear wall extending in the vertical direction provided for the contact surface of a cutting blade 12. Details of the section B-B indicated by dash-dotted lines running through the cutting comb 11 are shown in FIG. 6 and are described in more detail below.
- FIG. 6 shows a section through the substantially L-shaped cutting comb 11 with an integrally formed sliding surface 27, which is separated by a recess 28 from the sliding surface formed by the row of cutting teeth 17.
- the sliding surface of the row of cutting teeth 17 and the sliding surface 27 together form the running surface 110 of the cutting comb 11 on which the cutting blade 12 slides back and forth when the long hair cutting system LHS is started up.
- FIG. 7 shows a schematic illustration of a dimensionally stable cutting comb 11 with a flat running surface 110 for the abutment of the contact surface 120 of a cutting blade 12 having partial curvatures.
- the partial curvatures of the cutting blade 12 are through in the embodiment according to FIGS. 7, 8 and 9 the bending points B1 and B2 and by the respective end contact of the cutting blade 12 on the running surface 110 of the cutting comb 11 are determined.
- the mean curvature delimited by the bending points B1 and B2 is referred to as arch element BE1 and the adjoining lateral curvatures are referred to as arch elements BE2 and BE3.
- the radius of curvature R2 of the arc element BE2 has the same size as the radius of curvature R2 of the arc element BE3.
- the radius of curvature R1 of the arc element BE1 is larger than the radius of curvature R2.
- the bending points B1 and B2 can be produced, for example, by embossing by means of an embossing stamp and an embossing pad or by changing the compressive stress and tensile stresses of the rolled skin of the hardened cutting blade 12 by means of a laser beam.
- the curvature of the cutting blade 12 in the area of the distance A is usually in the order of magnitude of 0.03 to 0.3 mm.
- the distance A formed by the curvature is preferably in a range from 0.05 mm to 0.15 mm.
- two spring elements 19 - as shown in FIG. 2 - preferably act on the bending points B1 and B2, and bring the curved cutting blade 12 into contact with the cutting comb 11.
- the deformation process of the curved cutting blade 12 to for the extended contact with the cutting comb 11 is explained in more detail with reference to FIG. 8, starting from FIG. 7.
- the cutting blade 12 initially rests against the cutting comb 11 at points E 1 and E2 without force.
- the support forces K1 and K2 increase at the points E1 and E2.
- the arch element BE1 Since the curvature R1 of the arch element BE1 and thus also its restoring force is substantially less than that of the arch elements BE2 and BE3, the arch element BE1 is curved in the direction of the running surface 110 of the cutting comb 11 until it comes into contact with the point E3. Thereafter, the existing and existing pressure in the spring elements 19 causes the bending points B1 and B2 to move in the direction of the cutting comb 11 until both the bending points B1 and B2 and the curved surfaces of the curved elements BE 1 to BE 3 of the contact surface are completely seated 120 of the cutting blade 12 comes.
- the deflection of the arch element BE1 in the middle between the two bending points B1 and B2 causes, via the pressing force at the point E3, a uniform pressure distribution of the pressure emanating from the pressure elements 19 on the cutting blade 12 and thus ensures a good adaptation and slidable contact of the contact surface 120 the cutting blade 12 on the tread 110 of the cutting comb 11.
- FIG. 10 shows a view of the contact surface 120 of a cutting blade 12 with a sequence of arch elements BE1 to BE42 delimited by bending points B1 to B44.
- the bending points B1 to B22 are provided, for example, on a straight line which runs adjacent to a slightly curved row of cutting teeth 18 of the cutting blade 12.
- These bending points B1 to B44 are made, for example, by treating the cutting blade 12 generated by laser beams In the area of the interaction zone of laser beam and material, the material of the hardened cutting blade 12 initially heats up and then cools down. The stresses generated in the material by this treatment cause corresponding curvatures of the cutting blade 12, the size of which can be controlled by a corresponding heat balance at the interaction point
- the laser treatment reduces the compressive stress of the rolled skin of the hardened cutting blade 12 and divides the length of the cutting blade 12 into one or more defined arch elements. This results in an individually configurable curvature of the cutting blade 12 depending on the arrangement and number of laser points and / or lines both in the longitudinal direction and in the transverse direction of the cutting blade 12
- two rows R10 and R20 of bending parts B1 to B22 are provided, on the one hand, adjacent to the row of cutting teeth 18 and, on the other hand, at a relatively short distance from the longitudinal outer edge of the cutting blade 12.
- the bending points B1 to B22 formed by the irradiation points of the laser beam are provided produced by a pulsed solid laser body with a power between 50 to 100 watts and a pulse energy of approx.
- the bending parts B23 to B44 of the R20 series are manufactured in the same way
- the R10 and R20 series change the shape in such a way that the ends are viewed in the longitudinal direction the cutting blade 12 is raised to a curvature with a central distance A to a secant S * connecting the ends of the cutting blade 12.
- the tooth tips of the cutting tooth row 18 and the opposite side of the cutting blade 12 are also raised by a distance B both Changes in shape result in an optimal adaptation and smooth contact of the contact surface 120 of the cutting blade 12 with the running surface 110 of the cutting comb 11
- two openings 25 and 26 are provided for fastening the cutting blade 12 on the supporting body 13 - see FIG. 3
- the arch elements BE1 to BE21 provided here are each delimited by bending elements B1 to B22.
- the curvature of the contact surface 120 of the cutting blade 12 in the region of the row of cutting teeth 18 is determined by a sequence of arch elements BE 1 - BE 21 of the same curvature with a central distance A to one the ends of the cutting blade 12 connecting secant S * .
- the transitions connecting the arch elements BE1-BE21 are provided as bending points B1-B22, the curvature of the arch elements BE1-B22 being generated by applying a respective pulse energy to the respective bending point B1-B22 by means of a laser beam.
- FIG. 12 shows a perspective illustration of the cutting blade 12 with a row of cutting teeth 18 according to FIG. 10 and FIG. 11 with a view of its width BR.
- the width extension BR of the cutting blade 12 is divided into three arch elements BE101, BE102 and BE103 by means of two rows R10 and R20 of bending points B1 to B44 running in the longitudinal extension L of the cutting blade 12.
- the distance from the R10 row to the outermost ends is approx. 2.8 mm ⁇ 1 mm
- the distance from the R10 row to the R20 row is approx. 2.8 mm ⁇ 1 mm
- the distance from the R20 row to the outer edge 24 is approx. 1 .2 mm ⁇ 1 mm with a width BR of approx. 6.8 mm.
- the central distance B resulting from the stringing together of the arch elements BE100, BE101 and BE 102 to form a secant S * is 4 ⁇ m in the exemplary embodiment shown.
- the curvature of the cutting blade 12 in the area of the distance B is usually in the order of magnitude of 0 to 15 ⁇ m and preferably in a range of 3-5 ⁇ m.
- FIG. 13 shows a perspective illustration of the cutting blade 12 according to FIG. 12 with a section through the center of the cutting blade 12.
- the bending points B1 to B44 can deviate from the arrangement on one and / or more straight rows R10 and R20 in the respective application depending on the given need at other locations on the contact surface 120 of a cutting blade 12 to produce a direct or indirect effect of the pressure of a Spring element 19 shape-changing curvature.
- Such deviations from an arrangement on a straight row R10, R20 can, if necessary, be determined by comparative measurements on the cutting comb 11 and cutting blade 12 and then carried out accordingly in terms of production technology.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dry Shavers And Clippers (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Harvester Elements (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19944616A DE19944616C1 (en) | 1999-09-17 | 1999-09-17 | Long hair trimming system for electric razor has toothed trimming comb and cooperating cutting blade with trimming teeth pressed against runing surface provided by trimming comb by spring element |
DE19944616 | 1999-09-17 | ||
PCT/EP2000/007349 WO2001021361A1 (en) | 1999-09-17 | 2000-07-29 | Hair trimming system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1235666A1 true EP1235666A1 (en) | 2002-09-04 |
EP1235666B1 EP1235666B1 (en) | 2004-02-18 |
Family
ID=7922382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00954578A Expired - Lifetime EP1235666B1 (en) | 1999-09-17 | 2000-07-29 | Hair trimming system |
Country Status (9)
Country | Link |
---|---|
US (1) | US6490799B2 (en) |
EP (1) | EP1235666B1 (en) |
JP (1) | JP2003509182A (en) |
CN (1) | CN1195608C (en) |
AT (1) | ATE259694T1 (en) |
AU (1) | AU6698600A (en) |
DE (2) | DE19944616C1 (en) |
ES (1) | ES2215709T3 (en) |
WO (1) | WO2001021361A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7536787B2 (en) | 2004-03-30 | 2009-05-26 | Ridgewood Industries Llc | Wet razor and electric trimmer assembly |
EP2329928B1 (en) * | 2009-12-04 | 2012-07-04 | Braun GmbH | Electrically operated hair cutting device |
US9713877B2 (en) | 2014-11-12 | 2017-07-25 | Medline Industries, Inc. | Clipper head with drag reduction |
USD779123S1 (en) | 2014-11-12 | 2017-02-14 | Medline Industries, Inc. | Clipper head |
USD795497S1 (en) | 2016-01-15 | 2017-08-22 | Medline Industries, Inc. | Clipper |
USD794871S1 (en) | 2016-01-15 | 2017-08-15 | Medline Industries, Inc. | Clipper |
USD802216S1 (en) | 2016-06-10 | 2017-11-07 | Medline Industries, Inc. | Clipper head |
USD802215S1 (en) | 2016-06-10 | 2017-11-07 | Medline Industries, Inc. | Clipper head |
USD802214S1 (en) | 2016-06-10 | 2017-11-07 | Medline Industries, Inc. | Clipper head |
USD802217S1 (en) | 2016-06-10 | 2017-11-07 | Medline Industries, Inc. | Clipper head |
EP3381629A1 (en) | 2017-03-28 | 2018-10-03 | Koninklijke Philips N.V. | Comb arrangement, cutting head, and hair cutting appliance |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1544336A (en) * | 1977-03-11 | 1979-04-19 | Gillette Co | Hair clippers |
GB2094698B (en) * | 1981-02-13 | 1985-01-23 | Lister Farm Equipment R A Ltd | A clipper blade |
US4765060A (en) * | 1987-02-17 | 1988-08-23 | Micro Contacts Inc. | Disposable shaver head |
DE3819055A1 (en) * | 1988-06-04 | 1989-12-07 | Braun Ag | LONG HAIR CUTTER FOR DRY SHAVERS |
EP0652085A1 (en) * | 1993-11-10 | 1995-05-10 | Koninklijke Philips Electronics N.V. | Apparatus for cutting hair with a toothed cutter |
DE69935930T2 (en) * | 1998-12-29 | 2007-09-06 | Kim Thousand Oaks Laube | DISPOSABLE CUTTING HEAD FOR CUTTING MACHINE |
-
1999
- 1999-09-17 DE DE19944616A patent/DE19944616C1/en not_active Expired - Fee Related
-
2000
- 2000-07-29 ES ES00954578T patent/ES2215709T3/en not_active Expired - Lifetime
- 2000-07-29 EP EP00954578A patent/EP1235666B1/en not_active Expired - Lifetime
- 2000-07-29 JP JP2001524769A patent/JP2003509182A/en active Pending
- 2000-07-29 AT AT00954578T patent/ATE259694T1/en not_active IP Right Cessation
- 2000-07-29 DE DE50005354T patent/DE50005354D1/en not_active Expired - Fee Related
- 2000-07-29 AU AU66986/00A patent/AU6698600A/en not_active Abandoned
- 2000-07-29 WO PCT/EP2000/007349 patent/WO2001021361A1/en active IP Right Grant
- 2000-07-29 CN CNB008127921A patent/CN1195608C/en not_active Expired - Fee Related
-
2002
- 2002-03-15 US US10/099,632 patent/US6490799B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0121361A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1235666B1 (en) | 2004-02-18 |
US20020092177A1 (en) | 2002-07-18 |
ES2215709T3 (en) | 2004-10-16 |
ATE259694T1 (en) | 2004-03-15 |
JP2003509182A (en) | 2003-03-11 |
CN1195608C (en) | 2005-04-06 |
WO2001021361A1 (en) | 2001-03-29 |
CN1373699A (en) | 2002-10-09 |
DE19944616C1 (en) | 2000-12-28 |
AU6698600A (en) | 2001-04-24 |
US6490799B2 (en) | 2002-12-10 |
DE50005354D1 (en) | 2004-03-25 |
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