EP2123410B1 - Unité de lame de rasoir dotée d'une charnière à film - Google Patents

Unité de lame de rasoir dotée d'une charnière à film Download PDF

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Publication number
EP2123410B1
EP2123410B1 EP08104078A EP08104078A EP2123410B1 EP 2123410 B1 EP2123410 B1 EP 2123410B1 EP 08104078 A EP08104078 A EP 08104078A EP 08104078 A EP08104078 A EP 08104078A EP 2123410 B1 EP2123410 B1 EP 2123410B1
Authority
EP
European Patent Office
Prior art keywords
blade unit
razor blade
blade housing
handle
razor
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
EP08104078A
Other languages
German (de)
English (en)
Other versions
EP2123410A1 (fr
Inventor
Uwe Denkert
Kai-Uwe Rüde
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.)
Feintechnik GmbH Eisfeld
Original Assignee
Feintechnik GmbH Eisfeld
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 Feintechnik GmbH Eisfeld filed Critical Feintechnik GmbH Eisfeld
Priority to EP08104078A priority Critical patent/EP2123410B1/fr
Priority to ES08104078T priority patent/ES2370364T3/es
Priority to AT08104078T priority patent/ATE517722T1/de
Priority to US12/470,685 priority patent/US8096054B2/en
Publication of EP2123410A1 publication Critical patent/EP2123410A1/fr
Application granted granted Critical
Publication of EP2123410B1 publication Critical patent/EP2123410B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors 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
    • B26B21/08—Razors 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 involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/22—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously
    • B26B21/222—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit
    • B26B21/225—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit the changeable unit being resiliently mounted on the handle

Definitions

  • the invention relates to a razor blade unit for a razor according to the preamble of claim 1.
  • High-quality conventional razor blade units are pivotally mounted relative to the handle about a rotational or pivotal axis perpendicular to the longitudinal axis.
  • the skin contact level of the razor blade unit can thereby be applied better to the skin to be shaved during shaving.
  • the DE 297 24 245 U1 refers inter alia to a razor blade unit in which the axis of rotation is disposed over the cutting edges of the blades and over the housing.
  • the describes DE 297 24 245 U1 an axis of rotation located at the cutting edge of the second blade.
  • the axis of rotation lies either on the side of the blade unit or on the side of the blade unit opposite the razor handle to the shaving surface, whereby the axis of rotation, when placed in operation, lies on or below the surface to be shaved.
  • the blade unit carrier is supported on a four-bar linkage lying in a plane parallel to the blade edges.
  • a razor with a coupling connecting the handle and the blade unit, wherein the blade unit is pivotable about a first axis relative to the coupling.
  • the coupling is pivotally mounted about a second axis relative to the handle which, like the first axis, is parallel to the cutting edges.
  • the coupling and the blade unit are biased in predetermined rest positions.
  • the DE 698 08 479 T2 includes a blade unit engagement structure that allows pivotal movement of the blade unit about a pivot axis disposed parallel to a longitudinal axis of the blade unit.
  • the handle is connected to the blade unit engagement structure via a pair of resiliently deformable arms. The arms permit downward displacement of the blade unit engagement structure towards the handle, wherein movement of the blade unit engagement structure in a direction perpendicular to the direction of downward displacement is restricted.
  • a razor is known, on whose handle a razor blade unit is mounted at the front end by means of a fork mount.
  • the blade unit can be pivoted starting from a spring-loaded zero position about an axis of rotation parallel to the cutting edges.
  • the axis of rotation defined by the fork mount extends below the cutting edge of the first blade.
  • a razor with a blade unit having two guide members, each having a surface to be pressed against the skin, one or more blades being mounted between these two guide members.
  • a handle portion is rotatably mounted about a pivot axis to this blade unit, wherein the pivot axis is positioned parallel to the cutting edges of the blades.
  • the position of the pivot axis should be chosen so that a stable position of the blade unit is ensured when it is pressed against the skin surface via the handle.
  • the pivot axis for the blade unit is defined by the ends of two arms which each engage with a pin in the blade unit.
  • the US 2005/0198830 A1 shows a razor blade unit for connection to a handle.
  • a connecting element is used which has two arms and defines a pivot axis between two pivot pins. The pivot axis lies in front of the razor blades.
  • a razor blade unit with a blade carrier known, which is detachably attachable to a handle via a connector part, wherein the connector part and the blade carrier are interconnected via a connecting part, which is in the form of a film hinge, and wherein the connector part and the blade carrier further via a resilient Plastic component are connected, which almost exclusively determines the spring characteristic of the connection between the connector part and blade carrier.
  • the object of the present invention is to provide an improved razor blade unit, in which a precise investment of the cutting edges of the blades is guaranteed on the skin to be shaved, largely independent of the contact pressure with which the user acts on the shaver.
  • a razor blade unit according to the appended claim 1 is used.
  • An essential aspect of the present invention is the position of the pivot axis passing through the film hinge. This is positioned with respect to the direction of the longitudinal axis of the handle in an area extending from the front in the direction of shaving edge of the foam edge to the foam edge of the nearest cutting edge. If the pivot axis is in this area, this has due to the construction of the film hinge the particular advantage that the introduction of a force component on the handle in the direction of the skin section to be shaved does not lead to an unwanted uprighting of the blade housing, whereby the secure contact of the cutting edges with the shaving surface is ensured in each case.
  • a particularly preferred embodiment of the razor blade unit is characterized in that the connecting portion is divided into two and at each of the transverse to the cutting edges extending sides of the blade housing is arranged.
  • Each of these two connecting portions has two hinge legs, which are each connected to each other via a film hinge and are preferably enclosed on all sides by an elastomeric damping component.
  • the two so-formed film hinges are designed so flexible that they could not guarantee the necessary for the shave power transmission from the handle to the blade housing alone.
  • the hinges rather serve the easily pivotable connection between the blade housing and coupling section.
  • the required spring characteristic permitting power transmission and causing the blade housing to return to a null position is provided by the elastomeric damping component.
  • the general operation of a film hinge using a damping component is known from the above patent DE 103 27 739 B4 known, so here is a detailed explanation is omitted.
  • the foam edge consists of the same elastomeric soft plastic as the damping component.
  • the hard components of the blade housing, the coupling portion and the connecting portion may also consist of a uniform hard plastic, which has a greater strength and substantially no elasticity with respect to the soft plastic of the damping component. All housing parts of the razor blade unit can be produced in this way by a two-component plastic injection molding process.
  • a preferred embodiment of the razor cartridge has a pivot limiting leg mounted on either the blade housing or the coupling portion and cooperating with an opposing stop.
  • the Swivel angle by which the blade housing can be pivoted relative to the coupling portion can be limited in this way. This increases the safety during shaving and avoids damage to the film hinge as a result of unintentional overstretching due to large forces.
  • the pivot angle is preferably limited to a range between 0 ° and 45 °, based on the position of the blade housing relative to the longitudinal axis of the handle.
  • the coupling portion comprises a sleeve which is detachably mounted on an adapter portion of the handle.
  • the handle is thus reusable and the coupling between the razor blade unit and handle can be performed quickly and without further aids. Further details on the construction of the adapter portion and the handle can be taken from the detailed description of the figures. Modified embodiments, which are used for example in disposable razors application, have a permanent connection between the coupling portion and handle.
  • a particularly preferred embodiment of the razor blade unit according to the invention comprises 5 blades, which are arranged in the blade housing and whose cutting edges lie substantially in the skin-contacting plane. To achieve particularly good shaving results, the individual cutting edges may protrude more or less beyond the skin contact plane or be set behind it.
  • FIGS. 1 and 2 show the basic structure of the razor blade unit according to the invention, wherein the razor blade unit in Fig. 1 in an assembled state from the front (upper view) and a rear view (lower view) is shown while Fig. 2 shows a slightly modified design of the razor blade unit in an exploded view.
  • a razor blade unit 01 comprises a blade housing 02 for receiving a plurality of blades 04.
  • the blade housing 01 is used in the embodiment shown here for receiving a total of five blades 04, which each have a cutting edge 05.
  • the blades 04 are designed as angular blades in the illustrated embodiment.
  • the area having the cutting edge 05 is preferably angled at an angle of about 50 ° to 70 ° during the blade manufacturing process.
  • the blade housing 02 leaves on its front surface a blade window 06 open, in which the cutting edges 05 of the blades are exposed to be brought into skin contact during shaving.
  • the position of the cutting edges 05 defines a skin contact plane, which may also be formed as a slightly curved surface with different blade projection.
  • the blade window 06 is bounded on the short sides by side walls 07 of the blade housing.
  • the blade housing is preferably made of a hard plastic.
  • a foam edge 09 and a sliding strip 10 are arranged on the blade housing 02.
  • the foam edge 09 serving for prestressing the skin to be shaved consists of an elastomeric plastic and is preferably injected by means of two-component injection molding together with the blade housing 02. It would also be conceivable, of course, to use a separate component for the foam edge 09.
  • the sliding strip 10 comes during shaving after the cutting edges 05 of the blades 04 in contact with the skin.
  • the skin nourishing substances are included.
  • the sliding strip 10 consists of a water-soluble and a water-insoluble component. By means of the water-soluble component washing out during the service life of the razor blade unit, a wear indicator can be realized which informs the user of the end of use.
  • the attachment of the sliding strip 10 on the blade housing is preferably carried out via an adhesive connection.
  • the blade housing 02 is closed at the rear with a cover 14, preferably via a latching connection.
  • the cover 14 is provided with recesses 17, which are located on the lateral edge regions or on a central web 18. Each of these depressions 17 is preferably V-shaped and serves in the finished assembled razor blade unit for supporting a respective blade rear side, which lies opposite the cutting edge 05 of the blade.
  • the razor blade unit 01 further has a coupling portion 20, which is preferably made of the same hard plastic as the blade housing 02.
  • the coupling portion 20 serves for the preferably detachable attachment of the razor blade unit to a handle, the details of which will be described below.
  • the connection between the coupling portion 20 and the blade housing 02 is realized via a connecting portion, which comprises in the example shown two film hinges 21, which attach to the two side walls 07 of the blade housing 02. How out Fig. 2 can be seen, go from the hinge 21, two hinge legs 22, which are attributed to the connecting portion, but preferably each integrally formed with the adjacent blade housing 02 and the coupling portion 20.
  • the film hinge 21 ensures the pivotability between the blade housing 02 and the coupling portion 20 and thus defines a pivot axis 19, which in the illustrated embodiment by the two lateral Film hinges 21 extends.
  • the pivot axis 19 lies in a region which extends from the front edge of the foam edge 09 in the direction of shaving to the cutting edge 05 closest to the foam edge 09.
  • the preferred range A of the pivot axis is in the lower illustration of Fig. 1 located.
  • the film hinge 21 is encapsulated by a damping component 23.
  • the damping component 23 fills the remaining between the hinge legs 22 cavity and surrounds the hinge legs 22 preferably from all sides.
  • the damping component 23 consists of an elastomeric plastic, which preferably coincides with the soft component of the foam edge 09 and can be produced simultaneously with this in the two-component injection molding process.
  • the spring characteristic which determines the restoring forces for the blade housing set.
  • the coupling portion 20 further comprises a support portion 24 and integrally formed thereon sleeve 25, which serves to couple the razor blade unit to the handle.
  • the sleeve 25 has a latching element 26 which cooperates with complementary locking means on the handle.
  • Fig. 3 the razor blade unit 01 is shown in a side sectional view.
  • the coupling portion 20 is placed with the sleeve 25 on an adapter portion 30 of a handle 31.
  • the locking element 26 is engaged in a recess in the adapter section 30.
  • a pivot limiting leg 27 can be seen, which is mounted on the blade housing 02 and its pivoting about the pivot axis 19 when reaching a maximum pivot angle on a stop 28 on the coupling portion 20 comes to rest, thereby preventing further pivoting of the blade housing.
  • Fig. 4 11 shows a side view of a complete razor including the razor blade unit 01 and the handle 31.
  • the handle 31 has a base body 32 made of a hard plastic, on the side surfaces gripping portions 33 are formed from a plastic soft component.
  • Fig. 5 shows a cross-sectional view of the handle 31, as seen along a section line VV, which in Fig. 4 is drawn.
  • the main body 32 has a substantially U-shaped cross section, in which a metal weight 34 is received.
  • the metal weight 34 preferably extends out of the front region of the main body 32 and forms there the adapter section 30 (FIG. Fig. 6 ).
  • Left and right of the metal weight 34 32 elongated grooves 35 are introduced in the base body, in which holding webs 36 of a handle cover 37 are pressed.
  • the handle cover 37 is also made of a hard plastic and covers the metal weight 34 over its entire surface. To stabilize the position of the metal weight 34 37 surveys can be attached to the underside of the handle cover be that engage in the metal weight 34.
  • the handle cover 37 is fitted in corresponding recesses of the base body 32, wherein preferably a Abdichtlamelle 38 is provided in the support area, which is deformed during pressing of the handle cover in the body and as a circumferential seal acts.
  • Fig. 6 shows the front portion of the handle 31 with the adapter portion 30.
  • a discharge sleeve 40 which can be moved by the user towards the razor blade unit to the connection between the sleeve 25 of the coupling portion 20 and the adapter portion 30th to solve.
  • the discharge sleeve 40 has a surface structuring 41 on its upper side.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)

Claims (8)

  1. Unité de lame de rasoir (01), comprenant
    - un boîtier de lame (02), dans lequel sont disposées plusieurs lames (04) avec des arêtes de coupe (05) agencées parallèlement à un plan de contact principal;
    - un tronçon d'accouplement (20), qui peut être placé de préférence de façon amovible sur une manette (31);
    - un tronçon de liaison doté d'au moins une charnière à film (21) entre le boîtier de lame (02) et le tronçon d'accouplement (20), qui définit un axe de pivotement s'étendant parallèlement au plan de contact principal, et d'un composant d'amortissement (23) faisant ressort, lequel entoure la charnière à film (21) sur un côté ou plusieurs côtés et est formé aussi bien sur le boîtier de lame (02) que sur le tronçon d'accouplement (20); et
    - une arête en mousse (09) disposée dans le sens de rasage en amont des arêtes de coupe (05) des lames (04) pour la prétension de la peau pendant le rasage;
    caractérisée en ce que l'axe de pivotement passant par la charnière à film (21) est positionné entre la délimitation, avant dans le sens de rasage, de l'arête en mousse (09) et l'arête de coupe (05) située la plus près de l'arête en mousse (09), et en ce que sur chacune des parois latérales (07), agencées transversalement aux arêtes de coupe (05), du boîtier de lame est disposée une charnière à film (21), de laquelle partent à chaque fois deux branches de charnière (22), lesquelles sont entourées par le composant d'amortissement (23).
  2. Unité de lame de rasoir selon la revendication 1, caractérisée en ce que les branches de charnière (22) de la charnière à film (21) sont en plastique et sont conçues d'une seule pièce avec les tronçons contigus du boîtier de lame et/ou du tronçon d'accouplement, et en ce que le composant d'amortissement (23) est à base d'un plastique souple élastomère qui entoure les branches de charnière (22) sur tous les côtés.
  3. Unité de lame de rasoir selon la revendication 2, caractérisée en ce que l'arête en mousse (09) est à base du même plastique souple que le composant d'amortissement (23) et est moulé par injection sur le plastique dur du boîtier de lame (02) lors de la même étape de fabrication que le composant d'amortissement.
  4. Unité de lame de rasoir selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'une branche de limitation de basculement (27) est placée sur le boîtier de lame (02) ou sur le tronçon d'accouplement (20) qui, lorsque l'on atteint un angle de pivotement maximal, bute sur une butée (28) opposée sur le tronçon d'accouplement ou le boîtier de lame.
  5. Unité de lame de rasoir selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le boîtier de lame (02) peut basculer d'un angle compris entre 0° et 45° par rapport à l'axe longitudinal de la manette (31).
  6. Unité de lame de rasoir selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le tronçon d'accouplement (20) comprend une douille (25) qui peut être posée de façon amovible sur un tronçon adaptateur (30) de la manette (31).
  7. Unité de lame de rasoir selon l'une quelconque des revendications 1 à 6, caractérisée en ce que cinq lames (04) sont placées dans le boîtier de lames (02).
  8. Unité de lame de rasoir selon l'une quelconque des revendications 1 à 7, caractérisée en qu'elle présente une bande de glissement (10) disposée dans le sens de rasage après les arêtes de coupe (05) des lames (04).
EP08104078A 2008-05-23 2008-05-23 Unité de lame de rasoir dotée d'une charnière à film Active EP2123410B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP08104078A EP2123410B1 (fr) 2008-05-23 2008-05-23 Unité de lame de rasoir dotée d'une charnière à film
ES08104078T ES2370364T3 (es) 2008-05-23 2008-05-23 Unidad de cuchillas de afeitar con gozne de membrana.
AT08104078T ATE517722T1 (de) 2008-05-23 2008-05-23 Rasierklingeneinheit mit filmscharnier
US12/470,685 US8096054B2 (en) 2008-05-23 2009-05-22 Razor blade unit with film hinge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08104078A EP2123410B1 (fr) 2008-05-23 2008-05-23 Unité de lame de rasoir dotée d'une charnière à film

Publications (2)

Publication Number Publication Date
EP2123410A1 EP2123410A1 (fr) 2009-11-25
EP2123410B1 true EP2123410B1 (fr) 2011-07-27

Family

ID=39870606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08104078A Active EP2123410B1 (fr) 2008-05-23 2008-05-23 Unité de lame de rasoir dotée d'une charnière à film

Country Status (4)

Country Link
US (1) US8096054B2 (fr)
EP (1) EP2123410B1 (fr)
AT (1) ATE517722T1 (fr)
ES (1) ES2370364T3 (fr)

Cited By (2)

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EP2902156A1 (fr) 2014-01-31 2015-08-05 Feintechnik GmbH Eisfeld Rasoir doté d'une poignée et d'une unité de coupe rotative
US9475202B2 (en) 2012-09-27 2016-10-25 Shavelogic, Inc. Shaving systems

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KR102323315B1 (ko) * 2019-12-18 2021-11-08 주식회사 도루코 면도기
KR102474994B1 (ko) * 2020-05-26 2022-12-06 주식회사 도루코 면도기 카트리지
JP2023530542A (ja) * 2020-06-22 2023-07-19 エッジウェル パーソナル ケア ブランズ リミテッド ライアビリティ カンパニー 安全かみそり及び安全かみそりのためのコネクタ及びハンドル
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US8205344B2 (en) * 2008-08-20 2012-06-26 The Gillette Company Safety razor having pivotable blade unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9475202B2 (en) 2012-09-27 2016-10-25 Shavelogic, Inc. Shaving systems
EP2902156A1 (fr) 2014-01-31 2015-08-05 Feintechnik GmbH Eisfeld Rasoir doté d'une poignée et d'une unité de coupe rotative
US9522472B2 (en) 2014-01-31 2016-12-20 Feintechnik Gmbh Eisfeld Razor with a handle and rotatable cutting unit

Also Published As

Publication number Publication date
US20090288299A1 (en) 2009-11-26
US8096054B2 (en) 2012-01-17
EP2123410A1 (fr) 2009-11-25
ES2370364T3 (es) 2011-12-14
ATE517722T1 (de) 2011-08-15

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