EP3372359B1 - Rasierergriff, rasierapparat mit solch einem griff und verfahren zur herstellung davon - Google Patents

Rasierergriff, rasierapparat mit solch einem griff und verfahren zur herstellung davon Download PDF

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Publication number
EP3372359B1
EP3372359B1 EP17160416.8A EP17160416A EP3372359B1 EP 3372359 B1 EP3372359 B1 EP 3372359B1 EP 17160416 A EP17160416 A EP 17160416A EP 3372359 B1 EP3372359 B1 EP 3372359B1
Authority
EP
European Patent Office
Prior art keywords
handle
hollow cells
handle according
volume
shaver
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.)
Active
Application number
EP17160416.8A
Other languages
English (en)
French (fr)
Other versions
EP3372359A1 (de
Inventor
Spiros Gratsias
Efstratios CHRISTOFIDELLIS
Ioannis - Marios Psimadas
Ioannis Bozikis
Phaedon PAPAGEORGIS
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.)
BIC Violex SA
Original Assignee
BIC Violex SA
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
Priority to EP17160416.8A priority Critical patent/EP3372359B1/de
Application filed by BIC Violex SA filed Critical BIC Violex SA
Priority to PL17160416T priority patent/PL3372359T3/pl
Priority to RU2019123249A priority patent/RU2773176C9/ru
Priority to US16/492,391 priority patent/US11850764B2/en
Priority to EP18710838.6A priority patent/EP3592514B1/de
Priority to BR112019015902-9A priority patent/BR112019015902B1/pt
Priority to PCT/EP2018/055929 priority patent/WO2018162720A1/en
Priority to CA3052224A priority patent/CA3052224A1/en
Priority to CN201880009887.7A priority patent/CN110248780B/zh
Priority to PCT/EP2018/055932 priority patent/WO2018162723A1/en
Priority to MX2019009376A priority patent/MX2019009376A/es
Priority to US16/492,357 priority patent/US20200039099A1/en
Priority to JP2019542678A priority patent/JP2020509795A/ja
Priority to PL18710838T priority patent/PL3592514T3/pl
Priority to KR1020197022497A priority patent/KR102663783B1/ko
Publication of EP3372359A1 publication Critical patent/EP3372359A1/de
Application granted granted Critical
Publication of EP3372359B1 publication Critical patent/EP3372359B1/de
Priority to US18/175,428 priority patent/US20230226708A1/en
Priority to US18/515,931 priority patent/US20240083056A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00Razors 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
    • B26B21/40Details or accessories
    • B26B21/52Handles, e.g. tiltable, flexible
    • B26B21/522Ergonomic details, e.g. shape, ribs or rubber parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00Razors 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
    • B26B21/40Details or accessories
    • B26B21/52Handles, e.g. tiltable, flexible

Definitions

  • the disclosure relates to shaver handles, shavers including such handles and methods of manufacturing the same.
  • Shaver handles are usually compact plastic molded parts, molded as a single part or sometimes molded as several parts which are later assembled.
  • WO2006081842 shows an example of a known shaver handle.
  • US5784785 shows an example of a hollow razor handle, having a plurality of appertures.
  • the apertures on opposite sides of the hollow handle are axially displaced with respect to one another. Accordingly, an aperture faces a rib or solid portion of the opposite side of the handle.
  • GB543801 shows another example of a hollow razor handle comprising longitudinal slits which provide a flexibility to absorb human error during use.
  • One of the purposes of the present disclosure is to improve the shaver handles of the prior art, in particular with regard to material consumption and economy.
  • the present disclosure proposes a handle for a wet shaver according to claim 1.
  • the handle has:
  • the mechanical structure of the handle body can be highly efficient and may save a lot of material compared to compact handles full of solid material, for the same or similar mechanical properties.
  • a further object of the disclosure is a shaver comprising a handle with any of the above described features and a shaver head mounted on the head supporting portion of said handle.
  • Still another object of the disclosure is a method for reducing the amount of raw material used in manufacturing a handle for wet shaver comprising defining a cell containing structure using a Voronoi diagram, characterized in that the material volume used to manufacture said handle is at least 33% inferior compared to a handle having a similar bending efficiency ratio.
  • Figures 1 and 2 illustrate a shaver 1 according to a first embodiment, comprising a handle 2 and a shaver head 3.
  • the shaver head 3 may have a guard 4, one or several blades 5 and possibly a cover 6 or similar.
  • the handle 2 may be formed in one piece.
  • the handle 2 may be formed by a digital fabrication technology such as three dimensional (3D) printing, also called additive manufacturing.
  • Said 3D printing may be chosen in particular among additive manufacturing methods such as material extrusion (e.g. fused deposition modelling etc.), material jetting, VAT photopolymerization (e.g. digital light processing and electron beam melting, stereolithography etc.), sheet lamination, direct energy deposition, powder bed fusion (e.g. laser sintering etc.) and binder jetting.
  • a second step may follow, having the part shaped using conventional techniques (e.g. milling).
  • the handle may be formed in two or more parts which are later assembled together.
  • the handle may be manufactured by injection molding or by any known manufacturing method including additive manufacturing.
  • the handle 2 may be formed in one or several materials.
  • the handle 2 may be formed in one or several of the following materials: plastic materials, metals, mixtures of synthetic and natural materials including wood and paper, etc.
  • the handle 2 may comprise an elongated handle body 7 and a head supporting portion 8 supporting the shaver head 3.
  • the shaver head 3 may be removably or non-removably attached to the head supporting portion 8.
  • the handle body 7 is adapted to be held in hand by a user.
  • the handle body 7 extends between a distal end 9 (opposite the head supporting portion 8) and a proximal end 10 (close to the head portion 8), along a central line C.
  • the central line C may be curved.
  • the central line C may be included in a sagittal plane P0.
  • the shaver head 3 may be connected to the head supporting portion 8 by any known way, for instance pivotally around a pivot axis perpendicular to the sagittal plane P0, or otherwise.
  • the shaver head 3 may be pivotally mounted on two lateral arms 12 belonging to the head supporting portion 8 and elastically biased to a rest position by an elastic tongue 13 also belonging to the head supporting portion 8. Any other known way of mounting the shaver head 3 to the head supporting portion 8 would be possible.
  • the handle body 7 may have a cell structure formed by juxtaposed hollow cells 16, at least partly separated by solid walls 15.
  • the solid walls 15 may form a continuous, single solid part.
  • the cell structure has an envelope volume Vt, which is the internal volume comprised by an envelope surface S of the handle 2 as shown in Figure 6 .
  • the envelope volume Vt encompasses a certain empty volume Ve.
  • the ratio Ve/Vt of said empty volume on said envelope volume being between 33% and 90%, preferably more than 65 %.
  • the solid walls 15 may form a network of solid threads or arms which are connected together.
  • the cell structure 15, 16 may be formed as any structure, such as for example a Voronoi diagram.
  • said cell structure 15, 16 is a grid shell structure.
  • Such grid shell structure forms a continuous skin or shell which extends substantially on the envelope surface S of the handle body, thus defining the external shape of the handle body 7 and surrounding an inner volume 14 of the handle body.
  • the above mentioned hollow cells 16 are formed in the grid shell structure and are open towards the inner volume 14 and at the envelope surface S, and said solid walls 15 are separating said hollow cells 16 parallel the envelope surface S of the handle body.
  • the inner volume 14 is empty and free of solid walls.
  • the inner volume 14 may include solid walls belonging to the cell structure and defining hollow cells, for instance according to a 3D Voronoi diagram.
  • the handle body may be produced around any object (e.g. an insert made of any known material) entrapping it and/or enabling it to move freely in the handle body 7.
  • the grid shell structure 15, 16 may extend continuously around the central line C.
  • the grid shell structure 15, 16 may define a top portion 17, a bottom portion 18 and two side portions 19 all extending along the central line from the distal end to the proximal end, and said grid shell structure forms an apex 20 at the distal end 9 of the handle body ( Figures 4-5 ), continuously joining the top portion 17, bottom portion 18 and side portions 19.
  • the grid shell structure 15, 16 may be such that said hollow cells 16 represent between 30 % and 60 % of said outside surface.
  • the grid shell structure 15, 16 may be such that said hollow cells 16 have an average surface density (parallel to the envelope surface S) comprised between 0.3 and 3 cells / cm 2 .
  • the grid shell structure 15, 16 may be such that a plane perpendicular to said central line C and intersecting the handle body 7(for instance the planes P1, P2 shown in Figure 3 ) intersects an average number of hollow cells 16 comprised between 3 and 15.
  • the grid shell structure 15, 16 may be such that a plane including said distal end 9 and said proximal end 10 (for instance the sagittal plane P0), intersects an average number of hollow cells 16 comprised between 3 and 20.
  • the thickness e of the grid shell structure 15, 16 may be a few millimeters, for instance between 0,3 and 5 mm; the transverse dimension D of the grid shell structure 15, 16, perpendicular to the central line C, may be for instance between about 8 and 25 mm.
  • the length of grid shell structure 15, 16 may be for instance of about 90 to 120 mm and the total length of the shaver handle 2 may be for instance between about 110 to 140 mm. These dimensions may be typical for a normal handle and are not deemed to be limitative.
  • the handle can also be smaller, for instance with a length in the range of about 30-80 mm, in which case the length of the grid shell structure 15, 16 would be consequently reduced. Additionally the handle may have the grid shell structure 15, 16 only in a portion of its length and not in the whole volume.
  • the shaver handle 2 saves a lot of material compared to existing shaver handles, thus also saving weight and energy.
  • Table 1 The method used to calculate the values in Table 1 is as follows: A variety of commercially available shaver handles were gathered.
  • Vm volume of solid material
  • each handle was covered with a plastic film, simulating that the handle has a compact (full of material) shape and similarly the handle was inserted in the volume measuring tube, again full of deionized water. The water volume coming out of the tube was measured, corresponding to the envelope volume (Vt).
  • the invention In addition to saving material and minimizing energy footprint of the product, the invention also enables to improve the mechanical efficiency of the material used.
  • This bending efficiency ratio Rbe may be possibly obtained from a theoretical analysis, in particular from a finite element analysis which uses a 3d digital model to calculate the bending efficiency ratio by taking as input the force F applied to a distal end 9 of the handle and calculating the displacement d of the distal end 9 of the handle and the volume Vm of solid material of the handle.
  • Table 2 shows the comparison of the calculation of the bending efficiency ratio Rbe in the case of the shaver handle of Figures 1-5 compared to a compact shaver handle having the same envelope surface as shown in Figure 6 :
  • Handle of Figures 1-5 58,73 2.08 2.57 1.38 10 -4
  • Table 2 shows that the mechanical efficiency, measured by the ratio Rbe, is higher in the case of the invention compared to a compact handle of the same external shape.
  • the bending efficiency ratio of a handle according to the invention is preferably more than 1.20 10 -4 N.mm -4 , even more preferably larger than 1.30 10 -4 N.mm -4 .
  • the invention also provides better gripping for the user, increasing the comfort and the feeling of safety while shaving.
  • the handle body 7 may be for instance injection molded and the head supporting portion 8 may be formed as a separate part and fixed to the proximal end 10 of the handle body, for instance by fitting and / or ultrasound welding or by any other way.
  • the handle body 7 may include a central empty channel 21, obtained by using a slider in the mold if the handle body is manufactured by injection molding.
  • the central channel 21 may be axially open at the proximal end 10 of the central body.
  • the central channel 21 may extend along the central line C of the handle, which is curved in the example of Figures 7-8 .
  • the central channel 21 and the central line C of the handle may also be straight, as illustrated in the variant of Figure 9 .
  • the grid shell structure 15, 16 may have a larger and/or variable thickness compared to the first embodiment, the maximum width of channel 21 being defined by the neck of the handle body 7.
  • the handle body 7 may be for instance injection molded on an insert 22 and the head supporting portion 8 may be formed as a separate part and fixed to the handle body 7 and / to the insert 22 at the proximal end 10 of the handle body, for instance by fitting and / or ultrasound welding or by any other way.
  • the insert 22 may have a hole 23 at the proximal end 10 of the handle body and the head supporting portion 8 may have a lug 24 fitted into said hole 23.
  • the insert 22 may advantageoulsy be hollow, defining the empty inner volume 14.
  • the insert 22 may be blow molded.
  • the thickness of the insert 22 may typically range from a few tens of millimeters to a few millimeters.
  • the material of the insert may be PCTG (Glycol-modified Poly-Cyclohexylenedimethylene Terephthalate), for instance a PCTG with high optical transparency.
  • PCTG Gel-modified Poly-Cyclohexylenedimethylene Terephthalate
  • the grid shell structure 15, 16 may be injection molded from thermoplastic elastomer (TPE) on the insert 22.
  • TPE thermoplastic elastomer

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

Claims (12)

  1. Griff (2) für ein Nassrasiergerät, umfassend:
    - einen Griffkörper (7), der von einem Benutzer gehalten werden kann; und
    - einen Kopfstützabschnitt (8), der zum Stützen eines Rasiergerätkopfes (3), der mindestens eine Klinge (5) aufweist, angepasst ist,
    wobei der Griffkörper (7) eine Zellenstruktur (15, 16) aufweist, die durch nebeneinanderliegende Hohlzellen (16) gebildet wird, die zumindest teilweise durch massive Wände (15) getrennt sind,
    wobei die Zellenstruktur (15, 16) ein Umhüllungsvolumen Vt aufweist, das ein bestimmtes leeres Volumen Ve umfasst, wobei ein Verhältnis Ve/Vt des leeren Volumens auf dem Umhüllungsvolumen zwischen 33 % und 90 % liegt,
    dadurch gekennzeichnet, dass die Zellenstruktur (15, 16) als Voronoi-Diagramm ausgebildet ist.
  2. Griff nach Anspruch 1, wobei das Verhältnis Ve/Vt mehr als 65 % beträgt.
  3. Griff nach einem der vorhergehenden Ansprüche, wobei der Griffkörper (7) eine Außenfläche aufweist, die eine Form des Griffkörpers definiert, und wobei die Zellenstruktur (15, 16) eine Gitterschalenstruktur aufweist, die eine Haut bildet, die sich kontinuierlich entsprechend der Außenfläche erstreckt und ein Innenvolumen (14) umgibt, wobei die Gitterschalenstruktur die Hohlzellen (16) bildet, die zum Innenvolumen (14) und an der Außenfläche offen sind, und wobei die massiven Wände (15) die Hohlzellen (16) parallel zur Außenfläche trennen.
  4. Griff nach Anspruch 3, wobei das Innenvolumen (14) leer ist.
  5. Griff nach Anspruch 3, wobei das Innenvolumen (14) einen eingeschlossenen Einsatz enthält.
  6. Griff nach Anspruch 3, wobei das Innenvolumen (14) einen Einsatz enthält, der innerhalb des Innenvolumens (14) frei beweglich ist.
  7. Griff nach einem der Ansprüche 3 bis 6, wobei sich der Griffkörper (7) in Längsrichtung entlang einer Mittellinie (C) zwischen einem distalen Ende (9) und einem proximalen Ende (10) nahe dem Kopfstützabschnitt (8) erstreckt und wobei sich die Gitterschalenstruktur (15, 16) kontinuierlich um die Mittellinie (C) herum erstreckt.
  8. Griff nach Anspruch 7, wobei die Gitterschalenstruktur (15, 16) einen oberen Abschnitt (17), einen unteren Abschnitt (18) und zwei Seitenabschnitte (19) aufweist, die sich alle entlang der Mittellinie (C) vom distalen Ende (9) zum proximalen Ende (10) erstrecken, und wobei die Gitterschalenstruktur einen Scheitelpunkt (20) am distalen Ende bildet, der den oberen Abschnitt (17), den unteren Abschnitt (18) und die Seitenabschnitte (19) durchgehend verbindet.
  9. Griff nach einem der Ansprüche 7 bis 8, wobei die Hohlzellen (16) so angeordnet sind, dass eine Ebene (P1, P2) senkrecht zur Mittellinie (C) eine durchschnittliche Anzahl von Hohlzellen (16) schneidet, die zwischen 3 und 15 liegt.
  10. Griff nach einem der Ansprüche 7 bis 9, wobei die Hohlzellen so angeordnet sind, dass eine Ebene (PO), die das distale Ende (9) und das proximale Ende (10) umfasst, eine durchschnittliche Anzahl von Hohlzellen (16), die zwischen 3 und 20 liegt, schneidet.
  11. Griff nach einem der Ansprüche 3 bis 10, wobei die Hohlzellen (16) zwischen 30 % und 60 % der Außenfläche ausmachen.
  12. Griff nach einem der Ansprüche 3 bis 11, wobei die Hohlzellen (16) eine durchschnittliche Oberflächendichte zwischen 0,3 und 3 Zellen/cm2 aufweisen.
EP17160416.8A 2017-03-10 2017-03-10 Rasierergriff, rasierapparat mit solch einem griff und verfahren zur herstellung davon Active EP3372359B1 (de)

Priority Applications (17)

Application Number Priority Date Filing Date Title
PL17160416T PL3372359T3 (pl) 2017-03-10 2017-03-10 Uchwyt maszynki do golenia, maszynka do golenia zawierająca taki uchwyt i sposób ich wytwarzania
EP17160416.8A EP3372359B1 (de) 2017-03-10 2017-03-10 Rasierergriff, rasierapparat mit solch einem griff und verfahren zur herstellung davon
US16/492,357 US20200039099A1 (en) 2017-03-10 2018-03-09 Shaver handle and method of manufacturing
EP18710838.6A EP3592514B1 (de) 2017-03-10 2018-03-09 Rasierergriff, rasierapparat mit solch einem griff und verfahren zur herstellung davon
BR112019015902-9A BR112019015902B1 (pt) 2017-03-10 2018-03-09 Cabo para um barbeador a úmido e método para reduzir a quantidade de matéria prima usada na fabricação de um cabo para um barbeador úmido
PCT/EP2018/055929 WO2018162720A1 (en) 2017-03-10 2018-03-09 Shaver handle, shaver including such a handle and method of manufacturing the same
CA3052224A CA3052224A1 (en) 2017-03-10 2018-03-09 Shaver handle, shaver including such a handle and method of manufacturing the same
CN201880009887.7A CN110248780B (zh) 2017-03-10 2018-03-09 剃须刀手柄、包含此手柄的剃须刀和其制造方法
RU2019123249A RU2773176C9 (ru) 2017-03-10 2018-03-09 Рукоятка бритвы, бритва, содержащая такую рукоятку, и способ ее изготовления
MX2019009376A MX2019009376A (es) 2017-03-10 2018-03-09 Mango de afeitadora, afeitadora que incluye tal mango y metodo para manufacturar los mismos.
US16/492,391 US11850764B2 (en) 2017-03-10 2018-03-09 Method of manufacturing a shaver
JP2019542678A JP2020509795A (ja) 2017-03-10 2018-03-09 シェーバハンドル、そのようなハンドルを含むシェーバおよびその製造方法
PL18710838T PL3592514T3 (pl) 2017-03-10 2018-03-09 Uchwyt maszynki do golenia, maszynka do golenia zawierająca taki uchwyt i sposób ich wytwarzania
KR1020197022497A KR102663783B1 (ko) 2017-03-10 2018-03-09 면도기 손잡이, 이러한 손잡이를 포함하는 면도기 및 이의 제조 방법
PCT/EP2018/055932 WO2018162723A1 (en) 2017-03-10 2018-03-09 Method of manufacturing a shaver
US18/175,428 US20230226708A1 (en) 2017-03-10 2023-02-27 Shaver handle and method of manufacturing
US18/515,931 US20240083056A1 (en) 2017-03-10 2023-11-21 Shaver handle and method of manufacturing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17160416.8A EP3372359B1 (de) 2017-03-10 2017-03-10 Rasierergriff, rasierapparat mit solch einem griff und verfahren zur herstellung davon

Publications (2)

Publication Number Publication Date
EP3372359A1 EP3372359A1 (de) 2018-09-12
EP3372359B1 true EP3372359B1 (de) 2020-05-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17160416.8A Active EP3372359B1 (de) 2017-03-10 2017-03-10 Rasierergriff, rasierapparat mit solch einem griff und verfahren zur herstellung davon

Country Status (2)

Country Link
EP (1) EP3372359B1 (de)
PL (1) PL3372359T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3904023A1 (de) 2020-04-30 2021-11-03 Bic Violex S.A. Hautpflegevorrichtungsgriff mit flexiblem abschnitt

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543801A (en) * 1940-09-11 1942-03-12 Joe Edgar Bevis Improvements in or relating to safety razors
GB1520834A (en) * 1976-04-09 1978-08-09 Wilkinson Sword Gmbh Razors
DE29709361U1 (de) * 1997-05-28 1997-08-28 Stange, Dirk, 42275 Wuppertal Stehender Nassrasierer
US5784785A (en) * 1997-06-09 1998-07-28 Violex-Bic, S.A. Folding longitudinal razor
CA2596795A1 (en) 2005-02-03 2006-08-10 Bic-Violex Sa Razor handle having ergonomic gripping areas
US7779543B2 (en) * 2006-09-28 2010-08-24 Eveready Battery Company, Inc. Razor with moveable center of balance
JP5669473B2 (ja) * 2010-07-27 2015-02-12 株式会社貝印刃物開発センター 剃刀のハンドル

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
EP3372359A1 (de) 2018-09-12
PL3372359T3 (pl) 2020-09-21

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