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EP0652085A1 - Appareil pour couper les cheveux avec un dispositif de coupe denté - Google Patents

Appareil pour couper les cheveux avec un dispositif de coupe denté Download PDF

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Publication number
EP0652085A1
EP0652085A1 EP94203199A EP94203199A EP0652085A1 EP 0652085 A1 EP0652085 A1 EP 0652085A1 EP 94203199 A EP94203199 A EP 94203199A EP 94203199 A EP94203199 A EP 94203199A EP 0652085 A1 EP0652085 A1 EP 0652085A1
Authority
EP
European Patent Office
Prior art keywords
cutting teeth
tooth
knife
cutting
running surfaces
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.)
Withdrawn
Application number
EP94203199A
Other languages
German (de)
English (en)
Inventor
Josef Ribitsch
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Philips Electronics NV
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 Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP0652085A1 publication Critical patent/EP0652085A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—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
    • B26B19/06—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving co-operating cutting elements both of which have shearing teeth
    • 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
    • B26B19/102—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 with a secondary cutting unit being translated or slid into an operating position

Definitions

  • the invention relates to a device for cutting hair with a tooth cutting device, which has a stationary knife with at least one row of cutting teeth and a reciprocating knife with at least one row of cutting teeth, the cutting teeth in each case in the tooth direction of the two Knives protrude and have running surfaces and the two knives rest against one another under spring loading with at least some of the running surfaces of their cutting teeth and the running surfaces of the cutting teeth are only slightly concave parallel to the tooth direction from one of the two knives away from the free tooth ends.
  • Such a device according to the type mentioned in the first paragraph above is known to the applicant.
  • a knife is provided, which is produced in accordance with the method described in AT-B 340.795 and which therefore has cutting teeth, the running surfaces of which are slightly concave parallel to the tooth direction and evenly transverse to the tooth direction.
  • the other knife of the known device has cutting teeth, the running surfaces of which are practically completely flat and lie in one plane.
  • the invention has set itself the task of avoiding the difficulties mentioned above and to improve a device of the type mentioned in the first paragraph in a simple manner so that a perfect cutting behavior is guaranteed even in the area of the outer cutting teeth of the tooth cutting device and that between the cutting teeth only low friction values occur.
  • the other of the two knives in the area of the running surfaces of the cutting teeth between the two outermost cutting teeth is only slightly concave parallel to the direction of the row of cutting teeth. Investigations by the applicant have shown that the measures according to the invention in the area of all cutting teeth achieve flawless and good cutting behavior and that, in addition, particularly low friction values between the cutting teeth of the knives are achieved.
  • GB-A 2 094 698 also mentions that only one of the two knives can have such a double concave configuration.
  • a double concave design is incomparably more difficult to produce than a single concave design, as is the case with a device according to the invention, in which the running surfaces of the cutting teeth from one of the two knives away from the free tooth ends are only slightly concave parallel to the tooth direction and transverse to the tooth direction are designed to be flat, that is to say they are simply concave, and the other knife in the region of the running surfaces of the cutting teeth between the two outermost cutting teeth is only slightly parallel to the direction of the row of cutting teeth is concave and the running surfaces of the cutting teeth are flat from the free tooth ends parallel to the tooth direction, so it is also simply concave.
  • a tooth cutting device of a device according to the invention thus differs significantly from the tooth cutting device known from GB-A 2 094 698 both with regard to the structural design and with regard to ease of manufacture.
  • the distance between the running surface of a cutting tooth of the other knife lying in the middle of the row from a straight line connecting the running surfaces of the two outermost cutting teeth of this knife has a value between 1.0 ⁇ m and 50 in the non-installed state of this knife ⁇ m.
  • the distance of the running surface of a cutting tooth of the other knife lying in the middle of the row from a straight line connecting the running surfaces of the two outermost cutting teeth of this knife has a value between 7.0 ⁇ m and 15 ⁇ m in the non-installed state of this knife.
  • the concave course in the area of the running surfaces of the cutting teeth of the other knife is formed by a hollow grinding. This is advantageous in view of a particularly simple manufacture of the course which is slightly concave parallel to the direction of the row of cutting teeth.
  • FIG. 1 shows an oblique view of a shaving device according to a first exemplary embodiment of the invention, which has a short hair cutting device and a long hair cutting device.
  • 2 shows schematically a long-hair cutting device, as is provided in the device according to FIG. 1, and which is designed as a tooth cutting device with a tooth knife that can be driven back and forth and with a tooth knife that is stationary relative to the tooth knife that can be driven back and forth.
  • FIG. 3 shows a top view on a larger scale than the natural size of a practical embodiment variant of a stationary tooth knife of a tooth cutting device according to FIG. 2.
  • 4 shows the stationary tooth knife according to FIG. 3 in a section along the line IV-IV from FIG.
  • FIG. 5 shows, on a larger scale than FIG. 4, a cutting tooth of the stationary tooth knife according to FIGS. 3 and 4, the running surface of the cutting tooth being designed to be slightly concave parallel to the tooth direction away from the free tooth end.
  • FIG. 6 shows, in a manner analogous to that of FIG. 3, a top view of a practical embodiment variant of a tooth cutter of a tooth cutting device according to FIG. 2 that can be driven back and forth to interact with the stationary knife according to FIGS. 3 and 4.
  • 7 shows in a section along the line VII-VII of FIG. 6 the tooth cutter which can be driven back and forth and which is designed to be slightly concave in the region of the running surfaces of the cutting teeth between the two outermost cutting teeth in the direction of the row of cutting teeth.
  • FIG. 1 shows a shaving device 1 for cutting hair.
  • the shaving device 1 has a housing 2 on which a shaving head 3 is seated.
  • the shaving head 3 comprises a shaving head frame 4, in which a short hair cutting device 5 is provided for cutting whiskers.
  • the short hair cutting device 5 essentially consists of a curved shear foil 6 and a lamellar knife which is not visible in FIG. 1 and is resiliently pressed into the curvature of the shear foil 6.
  • the razor 1 has a tooth cutting device 7 as a long hair cutting device for cutting long beard hair and head hair.
  • the tooth cutting device 7 is in the region of a side wall 8 of the housing 2 in Longitudinal direction of the shaving device 1 held back and forth to be able to be moved between a rest position shown in Figure 1 and an operating position, not shown in Figure 1, closer to the short hair cutting device 5.
  • the shaving device 1 has a sliding button 9.
  • FIG. 2 schematically shows the tooth cutting device 7 of the shaving device 1 according to FIG. 1.
  • the tooth cutting device 7 has a stationary first knife 10 which is designed as a tooth knife with a row of cutting teeth 11 and which is held stationary on a carrier (not shown) for the entire tooth cutting device 7.
  • the tooth cutting device 7 has a second knife 12 which can be driven back and forth, which is also designed as a tooth knife with a row of cutting teeth 13 and which can be driven back and forth parallel to a drive direction indicated by an arrow 14.
  • the cutting teeth 11 of the stationary tooth knife 10 have running surfaces 15, and the cutting teeth 13 of the tooth knife 12 which can be driven back and forth have running surfaces 16.
  • the two knives 10 and 12 lie against one another at least with part of the running surfaces 15 and 16 of their cutting teeth 11 and 13.
  • the stationary tooth knife 10 and the back and forth drivable tooth knife 12 are held parallel to a pressing direction indicated by a further arrow 17 with the running surfaces 15 and 16 of their cutting teeth 11 and 13 pressed against one another.
  • the tooth knife 12, which can be driven back and forth, is carried here by a knife carrier 18, on which a compression spring 19 engages, which is supported on a stationary counter bearing 20 on the carrier for the entire tooth cutting device 7.
  • the tooth pitches of the two rows of cutting teeth 11 and 13 of the tooth knives 10 and 12 are different.
  • a drive part 21 which can be driven back and forth is provided, which is formed, for example, by a pivotably mounted drive lever.
  • a joint device 22 is provided, via which a driving force from the drive part 21 to the reciprocally drivable tooth knife 12, essentially into the area of the point of application of the resultant of the frictional forces between the two knives 10 and 12.
  • the joint device 22 has two webs 23 and 24 which are inclined in the opposite direction to the pressing direction 17 and which are connected to the drive part 21 via a joint 25 or 26 and to the knife carrier 18 via a joint 27 or 28.
  • the drive part 21 and the webs 23 and 24 and the knife carrier 18 are formed in one piece from plastic, the joints 25, 26, 27 and 28 being formed by film hinges.
  • FIGS. 3 and 4 show a practical embodiment variant of a stationary tooth knife 10 of a tooth cutting device 7, as is shown schematically in FIG. As can be seen from FIGS. 3 and 4, this stationary tooth knife 10 is cranked both in the area of the row of cutting teeth 11, specifically in the tooth root area 29, and in the area 30 facing away from the row of cutting teeth 11.
  • the cutting teeth 11 of the stationary tooth knife 10 protrude from the tooth knife 10 in a tooth direction indicated by an arrow 31 in FIGS. 3 and 4.
  • the running surfaces 15 of the cutting teeth 11 of the stationary tooth knife 10 are - as can be seen from FIGS. 4 and in particular 5 - designed to be slightly concave parallel to the tooth direction 31.
  • This slightly concave design of the running surfaces 15 of the cutting teeth 11 of the stationary knife 10 is obtained, for example, by the cutting teeth 11 being provided with a hollow grinding in the region of their running surfaces 15 by means of a grinding device when producing the stationary dental knife 10.
  • the grinding device has a grinding wheel which can be driven in rotation and which is slightly curved or curved in its peripheral region, the radius of curvature R1 of the peripheral surface having a value of, for example, two meters. Because of this slightly concave design of the running surfaces 15 of the cutting teeth 11, there is a level difference d of about 10 ⁇ m between the two ends of the running surfaces 15; this level difference d is shown exaggeratedly large in order to achieve a clear drawing.
  • the hollow grinding is provided not only in the area of the running surfaces 15 of the cutting teeth 11, but also in the area 30 of the knife 10 facing away from the row of cutting teeth 11, as is indicated in FIG.
  • FIGS. 6 and 7 show a practical embodiment variant of a tooth knife 12, which can be driven back and forth, of a tooth cutting device 7, as shown in FIG 2 is shown schematically.
  • the cutting teeth 13 of the tooth knife 12 protrude from the tooth knife 12 in a tooth direction indicated by an arrow 33 in FIG.
  • the tooth knife 12, which can be driven back and forth is designed to be slightly concave in the region of the running surfaces 16 of the cutting teeth 13 between the two outermost cutting teeth 13 ′ and 13 ′′ parallel to the direction of the row of cutting teeth 13.
  • the slightly concave design parallel to the direction of the row of cutting teeth 13 is advantageously chosen so that the distance a of the running surface 16 '''of a cutting tooth 13''' of the tooth knife 12 lying in the middle of the row from one of the running surfaces 16 'and 16 ′′ of the two outermost cutting teeth 13 ′ and 13 ′′ of the straight line g connecting the toothed knife 12 has a value of approximately 10 ⁇ m when the toothed knife 12 is not installed.
  • the distance a is exaggerated to achieve a clear drawing.
  • the concave course in the region of the running surfaces 16 of the cutting teeth 13 is formed by a hollow grinding.
  • This hollow grinding is also produced with a rotating drivable grinding wheel, which has a curved or curved peripheral surface, the radius of curvature R2 of which is approximately twelve meters.
  • the tooth knife 12, which can be driven back and forth, is also designed to be cranked in the area of the row of cutting teeth 13 and in the area 34 facing away from the row of cutting teeth 13.
  • the area 34 is also provided with the same hollow grinding as the running surfaces 16 of the cutting teeth 13 of the tooth knife 12 which can be driven back and forth.
  • the cutting teeth of the stationary tooth knife are designed to be slightly concave parallel to the tooth direction, and the tooth knife which can be driven back and forth in the region of the running surfaces of the cutting teeth between the two outermost cutting teeth of this tooth knife is slightly concave parallel to the direction of the row of cutting teeth educated.
  • the cutting teeth of the tooth knife which can be driven to and fro can be designed to be slightly concave parallel to the tooth direction and the stationary tooth knife in the area of the running surfaces of the cutting teeth between the two outermost cutting teeth can be designed to be slightly concave in the direction of the row of cutting teeth.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
EP94203199A 1993-11-10 1994-11-03 Appareil pour couper les cheveux avec un dispositif de coupe denté Withdrawn EP0652085A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT228493 1993-11-10
AT2284/93 1993-11-10

Publications (1)

Publication Number Publication Date
EP0652085A1 true EP0652085A1 (fr) 1995-05-10

Family

ID=3531500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94203199A Withdrawn EP0652085A1 (fr) 1993-11-10 1994-11-03 Appareil pour couper les cheveux avec un dispositif de coupe denté

Country Status (2)

Country Link
EP (1) EP0652085A1 (fr)
JP (1) JPH07185147A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19944616C1 (de) * 1999-09-17 2000-12-28 Braun Gmbh Langhaarschneidsystem
US20210229301A1 (en) * 2020-01-23 2021-07-29 Braun Gmbh Electric beard trimmer
US12011841B2 (en) 2020-01-23 2024-06-18 Braun Gmbh Electric beard trimmer
US12122056B2 (en) 2020-01-23 2024-10-22 Braun Gmbh Electric beard trimmer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5074679B2 (ja) * 2005-08-26 2012-11-14 パナソニック株式会社 バリカン
CN103182716A (zh) * 2011-12-27 2013-07-03 温州市百特电器有限公司 一种理发剪刀头

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT340795B (de) * 1975-04-28 1978-01-10 Philips Nv Verfahren zum schleifen eines gezahnten messers fur haarschneideapparate
GB2094698A (en) * 1981-02-13 1982-09-22 Lister Farm Equipment R A Ltd A clipper blade
US4765060A (en) * 1987-02-17 1988-08-23 Micro Contacts Inc. Disposable shaver head

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT340795B (de) * 1975-04-28 1978-01-10 Philips Nv Verfahren zum schleifen eines gezahnten messers fur haarschneideapparate
GB2094698A (en) * 1981-02-13 1982-09-22 Lister Farm Equipment R A Ltd A clipper blade
US4765060A (en) * 1987-02-17 1988-08-23 Micro Contacts Inc. Disposable shaver head

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19944616C1 (de) * 1999-09-17 2000-12-28 Braun Gmbh Langhaarschneidsystem
WO2001021361A1 (fr) 1999-09-17 2001-03-29 Braun Gmbh Tondeuse
US6490799B2 (en) 1999-09-17 2002-12-10 Braun Gmbh Long-hair cutter unit
US20210229301A1 (en) * 2020-01-23 2021-07-29 Braun Gmbh Electric beard trimmer
US12011841B2 (en) 2020-01-23 2024-06-18 Braun Gmbh Electric beard trimmer
US12122056B2 (en) 2020-01-23 2024-10-22 Braun Gmbh Electric beard trimmer

Also Published As

Publication number Publication date
JPH07185147A (ja) 1995-07-25

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