EP0216332B1 - Messerblock für Trockenrasierapparate - Google Patents

Messerblock für Trockenrasierapparate Download PDF

Info

Publication number
EP0216332B1
EP0216332B1 EP86112974A EP86112974A EP0216332B1 EP 0216332 B1 EP0216332 B1 EP 0216332B1 EP 86112974 A EP86112974 A EP 86112974A EP 86112974 A EP86112974 A EP 86112974A EP 0216332 B1 EP0216332 B1 EP 0216332B1
Authority
EP
European Patent Office
Prior art keywords
cutter
metallic core
knife
blades
plastic
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
Application number
EP86112974A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0216332A1 (de
Inventor
Karl Trölltsch
Werner Messinger
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
Priority to AT86112974T priority Critical patent/ATE40069T1/de
Publication of EP0216332A1 publication Critical patent/EP0216332A1/de
Application granted granted Critical
Publication of EP0216332B1 publication Critical patent/EP0216332B1/de
Expired legal-status Critical Current

Links

Images

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
    • B26B19/044—Manufacture and assembly of cutter blocks

Definitions

  • the invention relates to a knife block for dry shavers with circular blades arranged transversely to its longitudinal axis on a support.
  • a hollow cylinder is provided as a carrier for the ring-shaped knife blades, which are embedded at the same distance from one another in the hollow cylinder made of plastic or metal, for example aluminum.
  • One axial collar on each end of the hollow cylinder is used to insert the knife block thus formed into circular recesses of a coupling bridge connected to the drive of the dry shaving apparatus and swinging back and forth in the longitudinal extension of the blade block (JP-G M 48-42301).
  • a triangular collar or corresponding recesses are provided on the end face of the support body, which have the same recesses or projections on the the coupling block receiving the knife block interact (JP-GM 49-200).
  • the design of the carrier has proven to be problematic, in particular in the case of smaller knife blocks whose diameters are in the range below 10 mm.
  • the carrier In order to avoid bending the knife block under shaving pressure and to achieve the necessary embedding depth for the knife blades, which is essential for their stable attachment to the carrier, the carrier must be kept sufficiently thick on the one hand, but on the other hand, this measure, in particular with a Formation of metal, too heavy, so that the field of application of such knife blocks is limited.
  • the object of the invention is now to provide a knife block of the type mentioned, which can be kept mechanically stable with low weight against deflection, in which a stable mounting of the knife blades with good heat dissipation is ensured and which is inexpensive to produce, in particular with small knife blade diameters .
  • a cylindrical metal-plastic carrier which comprises a metallic core and a cylindrical plastic body which closely surrounds it and forms a compact unit therewith.
  • Such a metal-plastic carrier for the circular knife blades of the knife block is characterized by good stability, because it forms an extremely rigid and distortion-free carrier unit due to the close material connection of its metallic core to the material of the plastic body applied by injection molding.
  • the circular knife blades that are optimally anchored on this metal-plastic carrier have the same flexibility in every direction and shear quality at every point of their cutting edges due to their all-round fixing in the carrier material.
  • these knife blades can be manufactured relatively easily by circular grinding. This round grinding also allows the production of knife blades of relatively small diameter, which allows the manufacture of such small knife blocks. Accordingly, the knife blocks according to the invention can be used to implement shaving systems of relatively small size, which are characterized by particularly good adaptation to the areas of the face of the shaving person designated as problem areas.
  • the knife blades are anchored in the metallic core of the metal-plastic carrier by circumferential receiving means arranged at predetermined intervals from one another.
  • the same success can be achieved if the knife blades with their assigned concentric inner edges are placed directly on the metallic core of the metal-plastic carrier and positioned thereon in a mold cavity used to manufacture the knife block before the core is encapsulated with the material forming the plastic body will.
  • This arrangement also ensures a secure fixing and support of the knife blades on the metallic core of the metal-plastic carrier, whereby separate receptacles in the metallic core become unnecessary due to the lateral support of these blades by the material of the plastic body enveloping the core.
  • the knife blades of the knife block in its metal-plastic carrier are preferably cloverleaf-like cutouts arranged symmetrically to their concentric inner edges immediately surrounding the metallic core, through which the liquid plastic material during the injection molding of the plastic body can pass through and fill the spaces separated by the knife blades to the desired thickness of the plastic body.
  • the metallic core of the knife block can be designed differently. It is particularly advantageous with regard to its rotationally secure fixing in the plastic body enveloping it, if the metallic core of the knife block is designed as a cross-section profile bar with continuous longitudinal troughs, the webs of which correspond to the inner edges of the knife blades. Then in the mold nest here, too, the liquid material forming the plastic body - forming a positive connection with the profile rod - penetrate into the spaces between the knife blades via the longitudinal recesses.
  • the metallic core of the knife block is formed from a tube, the jacket of which has ring-shaped receiving grooves, which are always arranged at equal intervals, for inserting and positioning the individual knife blades.
  • the knife blades positioned in the tubular metal core by means of the receiving grooves assigned to its jacket have form-fitting recesses which are made of the material of the plastic body enveloping this tube in the mold cavity be penetrated.
  • the metal-plastic carrier of the knife block by pressing the metallic core during the manufacturing process in the mold cavity after the injection molding process into the plastic body which has a concentric axial bore.
  • Fig. 1 shows a general overview of the shaving head 1 of a dry shaver, which is equipped with a cylindrical knife block 2, the circular knife blades 3 cooperate with a shaving foil 4, which is held in a shaving head frame 5, which on a ledge of the housing 6 of the dry shaving apparatus is attachable.
  • a swing armature motor (not shown) is accommodated, which drives a U-shaped coupling bridge 9 via a rocking lever 7, an elastic coupling 8, which receives the knife block 2.
  • This is done here by a collar 10 formed on the end faces of the knife block 2 and which engages in one of the fork-shaped ends 11 of the coupling bridge 9.
  • Knife block 2 thus fixed in coupling bridge 9 is pressed elastically by a compression spring 12 assigned to and acting on the elastic couplings 8 against the shaving foil 4 fixed in the shaving head frame 5, for example by means of snap fasteners.
  • the knife block 2 comprises a metallic core 13 which is concentrically encased by a rotationally symmetrical body 14 made of plastic.
  • the individual knife blades 3 are placed on this metal-plastic carrier 15 thus formed, in such a way that their concentric inner or hole edges 16 rest directly on the core 13.
  • the inner edges 16 of the knife blades 3, as FIG. 3 shows more clearly, are assigned cloverleaf-shaped cutouts 17 through which the still liquid plastic forming the body 14 can flow during the manufacture of the knife block 2, thereby filling up the spaces between the knife blades 3 and making them firm Connection between the body 14 and the knife blades 3 is created by embedding, which on the other hand is supported directly on the metallic core 13.
  • each individual knife blade 3 shows, in a plan view of the end face of the knife block 2, which is closed off by the knife blade 3, the integration of each individual knife blade 3 into the metal-plastic carrier 15 by embedding it in the plastic body 14 with the aid of the plastic material flowing through it during the manufacturing process cloverleaf-shaped cutouts 17 which directly adjoin the metallic core 13 of the carrier 15 - surround it symmetrically.
  • the knife blades 3 also simultaneously embed the metallic carrier 13 in the plastic body 14 or enclose it firmly, for example by centering the same in a mold cavity used to manufacture the knife block 2.
  • the cylindrical knife block 2 enables the optional use of different areas of its knife blades 3 for interaction with the shaving foil 4 of the dry shaving apparatus by rotating about its longitudinal axis y.
  • the necessary conversion of the blade block 2 within the forks 11 of the coupling bridge 9 is facilitated by recessed grips 18 on the end faces of the metal-plastic carrier 15, which allow a secure grasping of the knife block to be converted or exchanged.
  • the metal-plastic bodies 15 in the receiving area are formed on the circumference by the forks 11 of the coupling bridge 9, two mutually parallel centering surfaces 19, which with corresponding parallel guide surfaces Interact forks 11 for the knife block 2 and thus enable a quick and easy setting of the respective shear zone.
  • FIG. 4 An alternative solution with regard to the manufacture and design of the cylindrical knife block is shown in FIG. 4.
  • the metal art Fabric carrier 15 'of the knife block 2' made of a metal core 13 'formed as a profile bar and a cylindrical plastic body 14' closely connected to it.
  • the individual knife blades 3 are placed on the metal-plastic carrier 15 'designed in this way, the inner or hole edges 16 of which rest on the webs 20 of the profiled metallic core 13' and are supported there.
  • the invention of the cylindrical blade block 2 'thus constructed also takes place in the injection molding process, with the metallic core 13' designed as a profile bar being centered in a mold cavity, whereupon during the injection molding process the plastic forming the plastic body 14 'through the longitudinal troughs 21 of the metal core 13 with a triangular cross section here 'flows, whereby, as in the example described above, an intimate connection of the same is achieved with the plastic body 14' surrounding it on all sides and with the knife blades 3 located directly on the core 13.
  • the knife blades 3 center themselves on the profiled core 13 'of the metal-plastic carrier 15'.
  • FIG. 5 shows a further alternative of a knife block according to the invention.
  • the metallic core 13 "of the metal-plastic carrier 15" is formed from a tube, the circumference of which has annular grooves 22 arranged at regular intervals for inserting and positioning the individual knife blades 3 of the knife block 2 ".
  • the metallic core 13" is from Plastic body 14 "is completely encapsulated or embedded in it and forms with it a compact body, namely the metal-plastic carrier 15" for the knife blades 3 of the knife block 2 ".
  • the knife blades 3 here have bores or recesses 23 which are always arranged at the same height which are penetrated by the plastic of the plastic body 14 ", which is still liquid during the manufacturing process, whereby, in addition to the inseparable fixing in the core 13" of the knife block 2 ", a particularly firm, positionally correct anchoring of the knife blades in the plastic body 14" is achieved
  • the profile rod forming the metallic core of the knife block or the tube more angular, for example quadrangular or hexagonal, which has the advantage that the entire knife block can thus be brought into predetermined different positions in order to enable different use of several peripheral regions of the knife blades, namely by twisting and inserting them within appropriately shaped Recesses in the clutch 8 carrying the knife block.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP86112974A 1985-09-25 1986-09-19 Messerblock für Trockenrasierapparate Expired EP0216332B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86112974T ATE40069T1 (de) 1985-09-25 1986-09-19 Messerblock fuer trockenrasierapparate.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853534166 DE3534166A1 (de) 1985-09-25 1985-09-25 Messerblock fuer trockenrasierapparate
DE3534166 1985-09-25

Publications (2)

Publication Number Publication Date
EP0216332A1 EP0216332A1 (de) 1987-04-01
EP0216332B1 true EP0216332B1 (de) 1989-01-18

Family

ID=6281893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112974A Expired EP0216332B1 (de) 1985-09-25 1986-09-19 Messerblock für Trockenrasierapparate

Country Status (7)

Country Link
US (1) US4751780A (enrdf_load_stackoverflow)
EP (1) EP0216332B1 (enrdf_load_stackoverflow)
JP (1) JP2672298B2 (enrdf_load_stackoverflow)
AT (1) ATE40069T1 (enrdf_load_stackoverflow)
DE (2) DE3534166A1 (enrdf_load_stackoverflow)
HK (1) HK102990A (enrdf_load_stackoverflow)
SG (1) SG84690G (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11219277B1 (en) 2021-03-19 2022-01-11 Jezekiel Ben-Arie Fast button attachment by resilient flaps trapping
US11622605B2 (en) * 2021-03-19 2023-04-11 Jezekiel Ben-Arie Button attachment by resilient gates trapping mechanism
US11375776B1 (en) 2021-12-27 2022-07-05 Jezekiel Ben-Arie Button fastening kit
US11766096B1 (en) 2022-06-01 2023-09-26 Jezekiel Ben-Arie Button fastening kit-III

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156336B (de) * 1960-01-19 1963-10-24 Siemens Elektrogeraete Gmbh Trockenrasiergeraet
US3154851A (en) * 1962-07-30 1964-11-03 Carl E Erickson Electric shaver
US3128550A (en) * 1962-08-29 1964-04-14 Miselli Afro Cutting head for electric shavers having a helical shaped movable cutter
DE1177976B (de) * 1962-12-05 1964-09-10 Lang Geb Scherkopf fuer Haarschneidemaschinen, vorzugsweise fuer elektrische Rasierapparate
AT257414B (de) * 1965-08-27 1967-10-10 Payer Lux Messerblock, insbesondere für Trockenrasierapparate, und Verfahren zur Herstellung desselben
JPS49200Y1 (enrdf_load_stackoverflow) * 1969-11-25 1974-01-07
DE2019744A1 (de) * 1970-04-23 1971-11-04 Braun Ag, 6000 Frankfurt Messerblock fuer Trockenrasierapparate mit einem Tragkoerper aus Kunststoff
JPS4842301U (enrdf_load_stackoverflow) * 1971-09-21 1973-05-30
JPS4842301A (enrdf_load_stackoverflow) * 1971-10-01 1973-06-20
JPS4846887U (enrdf_load_stackoverflow) * 1971-10-04 1973-06-19
US3766663A (en) * 1972-03-07 1973-10-23 Detroit Lime Co Preheater for lime kiln
JPS51129352A (en) * 1975-05-01 1976-11-10 Hamasawa Kogyo:Kk Inner blade of reciprocating type electric razor
DE2617332A1 (de) * 1976-04-21 1977-10-27 Karlheinz Niesner Trockenrasiergeraet
JPS5748233A (en) * 1980-09-08 1982-03-19 Toshiba Corp Exposure system for semiconductor substance
JPS58169482A (ja) * 1982-03-31 1983-10-05 松下電工株式会社 往復式電気かみそり
JPS5943008U (ja) * 1982-07-16 1984-03-21 昭和電線電纜株式会社 着雪防止電線

Also Published As

Publication number Publication date
DE3534166A1 (de) 1987-04-16
US4751780A (en) 1988-06-21
DE3661803D1 (en) 1989-02-23
JP2672298B2 (ja) 1997-11-05
HK102990A (en) 1990-12-14
ATE40069T1 (de) 1989-02-15
EP0216332A1 (de) 1987-04-01
DE3534166C2 (enrdf_load_stackoverflow) 1989-06-01
SG84690G (en) 1991-01-18
JPS62109590A (ja) 1987-05-20

Similar Documents

Publication Publication Date Title
DE2508175C2 (de) Ultraschallwerkzeug
EP2410889B1 (de) Borsteneinsatz, pinsel mit einem solchen borsteneinsatz und verfahren zur herstellung eines solchen borsteneinsatzes
DE3400675C2 (de) Elektromagnetische Bremse
EP0611632A1 (de) Beidhändig geführtes Elektrohandwerkzeug mit Griffbügel
EP0048029B1 (de) Rutenangel mit Angelschnur-Führungsring und Verfahren zu ihrer Herstellung
DE3217218C2 (de) Gehäuse für ein elektrisches Gerät
EP0216332B1 (de) Messerblock für Trockenrasierapparate
EP0075670A1 (de) Kolben für ein Präzisionsdosiergerät
DE2914195C2 (de) Induktiver Meßumformer für ein fluidisches Stellglied
EP0529478A1 (de) Rasierapparat
DE2601152C2 (de) Elektrisches Trockenrasiergerät
EP0331938B1 (de) Vorrichtung zum lagegenauen Befestigen von mehreren Teilen auf einem Hohlkörper
DE4139456A1 (de) Befestigungskonstruktion fuer schnurfuehrung
DE3405299C2 (enrdf_load_stackoverflow)
DE19581502C2 (de) Einspritzeinheit einer Spritzgießmaschine
DE3014903C2 (de) Vorrichtung zur wegabhängigen Steuerung von Funktionsabläufen einer Spritzgießmaschine
DE3306323A1 (de) Schrittschaltmotor
DE10156898A1 (de) Halteelement und Verfahren zum Herstellen eines Halteelementes sowie Verwendung von Strangpress-Elementen
EP0598165A1 (de) Vorrichtung zum gelenkigen Verbinden von Teilen, sowie Schaftstangen, Schafttriebe und Webmaschinen mit einer entsprechenden Vorrichtung
DE3325683A1 (de) Vorrichtung in form eines clips und verfahren zum instellungbringen von kabeln
DE3529550A1 (de) Montageeinrichtung fuer eine kaltschrumpfschlauch-kabelverbindung
DE2408782B2 (de) Verfahren und Vorrichtung zum Herstellen des Stators eines Elektromotors
DE8902166U1 (de) Haarfärbeeinrichtung
DE3047065C2 (de) Seilmarker
DE20000645U1 (de) Positioniergerüst

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR GB LI NL

17P Request for examination filed

Effective date: 19870416

17Q First examination report despatched

Effective date: 19880603

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB LI NL

REF Corresponds to:

Ref document number: 40069

Country of ref document: AT

Date of ref document: 19890215

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3661803

Country of ref document: DE

Date of ref document: 19890223

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19941111

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19950911

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19950930

Ref country code: CH

Effective date: 19950930

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19970401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19970401

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970818

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970917

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980919

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980919

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020907

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20020923

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030919

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040401