EP1871575A1 - Clipping system for an electric hair-cutting appliance - Google Patents
Clipping system for an electric hair-cutting applianceInfo
- Publication number
- EP1871575A1 EP1871575A1 EP06723042A EP06723042A EP1871575A1 EP 1871575 A1 EP1871575 A1 EP 1871575A1 EP 06723042 A EP06723042 A EP 06723042A EP 06723042 A EP06723042 A EP 06723042A EP 1871575 A1 EP1871575 A1 EP 1871575A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shearing
- holder
- machine part
- blade
- shearing blade
- 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
- 238000010008 shearing Methods 0.000 claims description 48
- 239000000463 material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 5
- 239000012768 molten material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 27
- 239000011888 foil Substances 0.000 description 7
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000000155 melt Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000019300 CLIPPERS Diseases 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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
-
- 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 shaving system for an electric hair trimmer, an electric hair trimmer with such a shaving system and a method for producing such a shaving system.
- a shaving system for an electric shaver typically has a bottom blade and a top blade that closely abut each other and move relative to each other. By this relative movement whiskers, which reach into the area between the upper blade and the lower blade, severed.
- Such a razor is known for example from EP 1 182 014 A2.
- an electric razor is disclosed which has two bottom blades and a trained as a shear foil upper blade. The lower blades are placed in a linear oscillating motion and thereby cut through in cooperation with the upper knife the whiskers.
- WO 2004/076135 A1 likewise discloses an electric shaver with two lower blades which oscillate relative to an upper blade designed as a foil.
- the lower blades are each connected via a coupling element with a drive element.
- the respective lower blade is arranged on the coupling element such that projections formed on the coupling element engage in recesses of the lower blade.
- the invention has for its object to permanently fix a shearing blade of an electric hair clipper on a machine part and thereby achieve the highest possible precision with a reasonable cost.
- the shearing system according to the invention for an electric hair trimmer has a shearing blade for severing hair and a machine part, with which the shearing blade is firmly connected.
- the peculiarity of the shear system according to the invention consists in that the shearing blade and the machine part are connected to each other via at least one metallic weld joint.
- the invention has the advantage that the shearing blade is precisely and permanently fixed to the machine part.
- the metallic weld is very durable, takes up little space and can be made quickly and inexpensively.
- At least one holder is formed on the shearing blade and the welded connection is arranged in the region of the holder. It is advantageous if the holder is easier to deform than the shearing blade.
- the holder between the welded joint and the shearing blade region-wise have a reduced material cross-section. In the formation of the welded joint resulting stresses cause deformations mainly in the region of the reduced material cross-section and are therefore not or only in reduced form transferred to the shear blade. Consequently, an undesirable deformation of the doctor can be avoided and thus a good dimensional stability can be achieved. This is an important prerequisite for achieving a good shaving result.
- the welded joints are preferably arranged so that at least partially compensate for the stresses caused by the welds.
- the welds are formed at mutually symmetrical locations of the holder.
- the holder is preferably formed integrally with the shearing blade. Furthermore, it is advantageous if the holder is connected via a web to the shear blade. The web also leads to a certain decoupling of the welded connection or of the several welded connections from the shearing blade and thereby to a reduction of welding-induced distortions.
- the holder can surround the machine part in some areas. This facilitates the fixation of the shear blade on the machine part and gives a reliable grip.
- the holder follows in accordance with a variant in the entire Umsch.ungs Scheme with their machine part facing surface of the molding of the machine part.
- the holder gives way in regions, in particular in a welded connection adjacent area with their machine part facing surface of the shape of the machine part from that the distance of the holder is increased by the machine part in this area.
- the holder thus has a reduced material cross-section, so that any stresses, in particular in this area, cause deformations and, if necessary, are transmitted in an attenuated form to the shearing blade.
- the shearing system according to the invention can be designed so that the holder has at least one holding arm. It is particularly advantageous if the holder has two, in particular symmetrically designed holding arms, between which the machine part is arranged. In this embodiment, a particularly effective suppression or compensation of voltages is possible.
- the shearing blade may be formed as a lower blade, which is driven in particular oscillating over the machine part.
- the shearing blade may have a U-shaped cross-section.
- the shearing blade may have a material thickness of less than 1 mm, preferably less than 0.5 mm and in particular about 0.3 mm.
- a further shearing blade is provided, with which cooperates the shearing blade.
- the invention further relates to an electric hair trimmer with at least one inventively designed shear system.
- a shearing knife for severing hair is firmly connected to a machine part.
- the method according to the invention is characterized in that the shearing blade and the machine part are connected to one another via at least one metallic welded joint.
- FIG. 3 shows the lower blade of FIG. 2 in a sectional view
- FIG. 4 shows an enlarged detail of FIG. 2 in the region of one of the holders, FIG.
- Fig. 1 shows an embodiment of an electric shaver 1 in side view.
- the razor 1 has a housing 2 durable in the hand and a shaving head 3 attached thereto.
- a switch 4 for switching on and off of the shaver 1 is arranged on the housing 2, a switch 4 for switching on and off of the shaver 1 is arranged.
- the shaving head 3 has a shearing system 5, of which only one shearing foil 7 arranged in a holding frame 6 is visible in FIG.
- Fig. 2 shows an embodiment of an inventively designed lower blade 8 in side view.
- An associated sectional view is shown in Fig. 3.
- the lower blade 8 represents a further component of the shaving system 5 and is in the assembled state closely to the inside of the shear foil 7 shown in Fig. 1 at.
- the lower blade 8 is displaced relative to the shear foil 7 in a linear oscillating movement. This movement causes hair, which penetrate through the shear foil 7 to the lower blade 8, detected by the lower blade 8 and severed in cooperation with the shear foil 7.
- the lower blade 8 is U-shaped and is composed of a first leg 9, a second leg 10 and an arranged between the legs 9 and 10 elbow piece 11 together.
- each two brackets 13 are formed, with which the lower blade 8 is fixed to two axles 14 which are oriented transversely to the longitudinal extent of the lower blade 8.
- the axes 14 may be components of an otherwise not figuratively illustrated carrier, which couples the lower blade 8 with a drive of the razor 1, by means of which the lower blade 8 is set in a linear oscillating movement.
- the design of the brackets 13 will be explained in more detail with reference to FIG. 4.
- FIG. 4 shows an enlarged detail from FIG. 2 in the region of one of the holders 13.
- the holder 13 is symmetrically shaped and formed integrally with the first leg 9 of the lower blade 8.
- the holder 13 has two retaining arms 15, which together form a fork and partially encompass the illustrated axis 14.
- the two holding arms 15 unite in the region of a web 16, via which the holder 13 is connected to the first leg 9 of the lower blade 8.
- the web 16 has a lateral extension parallel to the outer contour of the first leg 9 of the lower blade 8, which is smaller than the entire lateral extent of the two support arms 15.
- the support arms 15 are formed with arcuate inner surfaces 17 at.
- the axis 14 is made of metal, preferably made of steel.
- the lower blade 8 is made of metal at least in the region of the brackets 13.
- the lower blade 8 is made entirely of metal, in turn, steel is particularly well suited as a material.
- the material thickness of the lower blade 8 is less than 1 mm.
- a material thickness of less than 0.5 mm is selected. In the illustrated embodiment, the material thickness is about 0.3 mm.
- the holder 13 and the axis 14 are welded together.
- two welding points 18 are formed in the vicinity of the free ends of the support arms 15 in mutually symmetrical positions. Between the welding points 18 and the web 16, the holding arms 15 each have a partially reduced material cross section.
- the welding spots 18 are preferably formed by laser welding.
- the designated boundary areas between the support arms 15 and the axle 14 are briefly exposed to a high-energy laser beam. This leads to a local melting of the material in the region of the laser beam.
- the molten material of the holding arms 15 connects to the molten material of the axis 14.
- the melting takes place in a period of about 1 ms to 10 ms and is carried out for both welding points 18 simultaneously or in short succession.
- the time offset of the melting between the two welding points 18 is a maximum of about 1 ms, so that the material in the region of the second welding point 18 is already melted before the material is solidified in the first melting point 18.
- the simultaneous melting in the region of the two welding spots 18 can be achieved, for example, with the aid of a bifocal laser beam, which is adjusted so that one focus is formed in the region of each of the two welding spots 18.
- volumetric shrinkage and contraction of the cooling melt create stresses.
- tensile stresses arise normal to the envelope surface of the melt volume, which corresponds to the illustrated spot welds 18.
- the stresses can be reduced to some degree by a low melt volume and a small weld gap.
- a plurality of welds 18 are formed in the manner described at least approximately simultaneously, so that partially cancel the tensions in the contraction of the melt volume.
- the four welding points 18, via which the axle 14 is connected to a holder 13 of the first leg 9 and a holder 13 of the second leg 10 of the lower cutter 8, can be generated simultaneously or approximately simultaneously.
- a second measure is that the individual welding points 18 are preferably arranged so that after cooling the melt in the welding gap normal to the envelope surface of the melt volume can be a cancellation of the voltages.
- the welding points 18 are arranged symmetrically opposite each other for this purpose.
- their effect on the shape of the lower blade 8 can be limited according to a third measure in that the brackets 13 deform more easily than the lower blade 8. This is due to the fork shape of the brackets 13 and the partially reduced material cross section of the support arms 15th reached.
- the stresses acting on the lower blade 8 can be limited by the fact that the measures described are used in combination. But it is also possible to apply the measures individually or as subcombinations.
- the described arrangement of the welding points 18 and the at least approximately simultaneous melting are preferably used in combination. Further exemplary embodiments for this purpose are shown in FIGS. 5 and 6.
- Exemplary embodiments thereof are shown in FIGS. 7 to 10.
- FIG. 5 and 6 show further embodiments of the lower blade 8, wherein the brackets 13 are fixed with two welding points 18 on the axis 14, in a Fig. 4 corresponding representation.
- the axis 14 is almost completely enclosed by the holding arms 15 of the holder 13 except for a small gap 19.
- the gap 19 is formed in each case on a web 16 of the opposite side of the holder 13 between the free ends of the support arms 15. On both sides of the gap 19 each have a weld 18 is formed.
- the entire inner surface 17 of the two retaining arms 15 is formed in a circular arc.
- only a partial area of the inner surface 17 of the two retaining arms 15 is circular-arc-shaped.
- the inner surface 17 deviates in each case in an adjacent to the welding point 18 portion of the support arm 15 of the shape of a circular arc such that initially increasingly larger radii are assumed and then reduce the radii again until the arc is reached again.
- each support arm 15 adjacent to its welding point 18 on a bulge 20, in the region of which the inner surface 17 of the support arm 15 is spaced from the axis 14 and the material cross-section of the support arm 15 is thereby reduced. In this way, a further improved stress relief is possible.
- FIGS. 7 to 10 show exemplary embodiments of the lower blade 8, wherein the brackets 13 are fixed to the axle 14, each with a welding point 18, in a Fig. 4 corresponding Presentation.
- the holder 13 in each case only one holding arm 15 and is formed overall hook-shaped. In the vicinity of its free end of the support arm 15 is connected by a weld 18 with the axis 14.
- the holding arm 15 encloses approximately half the circumferential area of the axis 14.
- the inner surface 17 of the holding arm 15 in the embodiment of FIG. 7 is formed as a continuous circular arc.
- the holding arm 15 encloses the axis 14 almost completely, so that the free end of the holding arm 15 in each case reaches almost to the web 16.
- the welding point 18 is also formed again in the vicinity of the free end of the support arm 15 in these embodiments.
- the embodiment of FIG. 9 has a continuous circular arc-shaped inner surface 17 of the holding arm 15.
- a bulge 20 is formed next to the welding point 18. Outside the bulge 20, the inner surface 17 of the support arm 15 is formed in a circular arc.
- the weld spots 18 may be fabricated not only with the laser welding described above, but also with other high energy density welding methods, such as micro plasma or electron beam welding.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Dry Shavers And Clippers (AREA)
- Laser Beam Processing (AREA)
- Scissors And Nippers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005010244A DE102005010244A1 (en) | 2005-03-05 | 2005-03-05 | Shearing system for an electric hair trimmer |
PCT/EP2006/001345 WO2006094605A1 (en) | 2005-03-05 | 2006-02-15 | Clipping system for an electric hair-cutting appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1871575A1 true EP1871575A1 (en) | 2008-01-02 |
EP1871575B1 EP1871575B1 (en) | 2009-10-28 |
Family
ID=36390230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06723042A Active EP1871575B1 (en) | 2005-03-05 | 2006-02-15 | Clipping system for an electric hair-cutting appliance |
Country Status (7)
Country | Link |
---|---|
US (1) | US7895753B2 (en) |
EP (1) | EP1871575B1 (en) |
JP (1) | JP4870146B2 (en) |
CN (1) | CN101132888B (en) |
AT (1) | ATE446826T1 (en) |
DE (2) | DE102005010244A1 (en) |
WO (1) | WO2006094605A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005010244A1 (en) * | 2005-03-05 | 2006-09-07 | Braun Gmbh | Shearing system for an electric hair trimmer |
DE102008031135B4 (en) * | 2008-07-01 | 2014-11-20 | Braun Gmbh | Cutting device for removing hair |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT181527B (en) * | 1953-12-17 | 1955-03-25 | Gerhard Dipl Ing Heyek | Lower blade for the shaving head of dry razors |
US2841867A (en) * | 1957-03-15 | 1958-07-08 | Padgett Grady | Reciprocating dry shaver head construction |
US3060570A (en) * | 1959-03-04 | 1962-10-30 | Wahl Clipper Corp | Mounting structure for movable cutting blade |
US3201178A (en) * | 1963-08-21 | 1965-08-17 | Matsushita Electric Works Ltd | Electric dry shaver head having trimmer edge |
US3555676A (en) * | 1966-05-27 | 1971-01-19 | Sunbeam Corp | Electric dry shaver |
US3858461A (en) * | 1973-11-08 | 1975-01-07 | Sperry Rand Corp | Shaver inner cutter |
FR2575691B1 (en) * | 1985-01-09 | 1988-07-08 | Seb Sa | KNIVES FOR RAZOR WITH GRID AND SUPPORT BEARING THESE KNIVES, METHOD FOR SHARPENING AND ASSEMBLING THESE KNIVES |
JPH0671060A (en) * | 1992-08-26 | 1994-03-15 | Matsushita Electric Works Ltd | Inner blade for reciprocation type electric razor and manufacture thereof |
DE4413352C1 (en) * | 1994-04-18 | 1995-05-04 | Braun Ag | Method for producing a cutter for a cutting device of an electric razor or beard trimmer |
GB9614159D0 (en) * | 1996-07-05 | 1996-09-04 | Gillette Co | Dry shaving apparatus |
GB9614160D0 (en) * | 1996-07-05 | 1996-09-04 | Gillette Co | Dry shaving apparatus |
KR100543557B1 (en) * | 1997-10-30 | 2007-04-25 | 산요덴키가부시키가이샤 | Electric shaver |
JP2002058887A (en) * | 2000-08-22 | 2002-02-26 | Matsushita Electric Works Ltd | Edge for electric razor |
JP4273786B2 (en) * | 2003-02-25 | 2009-06-03 | パナソニック電工株式会社 | Electric razor |
JP2005198795A (en) * | 2004-01-15 | 2005-07-28 | Izumi Products Co | Method of manufacturing cutter of reciprocating type electric razor and cutter |
JP4140558B2 (en) * | 2004-06-14 | 2008-08-27 | 松下電工株式会社 | Electric razor |
DE102005010244A1 (en) * | 2005-03-05 | 2006-09-07 | Braun Gmbh | Shearing system for an electric hair trimmer |
-
2005
- 2005-03-05 DE DE102005010244A patent/DE102005010244A1/en not_active Withdrawn
-
2006
- 2006-02-15 AT AT06723042T patent/ATE446826T1/en active
- 2006-02-15 CN CN2006800071706A patent/CN101132888B/en active Active
- 2006-02-15 JP JP2008500064A patent/JP4870146B2/en active Active
- 2006-02-15 WO PCT/EP2006/001345 patent/WO2006094605A1/en not_active Application Discontinuation
- 2006-02-15 DE DE502006005247T patent/DE502006005247D1/en active Active
- 2006-02-15 EP EP06723042A patent/EP1871575B1/en active Active
-
2007
- 2007-09-04 US US11/849,492 patent/US7895753B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006094605A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4870146B2 (en) | 2012-02-08 |
DE102005010244A1 (en) | 2006-09-07 |
WO2006094605A1 (en) | 2006-09-14 |
US7895753B2 (en) | 2011-03-01 |
DE502006005247D1 (en) | 2009-12-10 |
JP2008531229A (en) | 2008-08-14 |
EP1871575B1 (en) | 2009-10-28 |
US20080047146A1 (en) | 2008-02-28 |
CN101132888B (en) | 2010-06-16 |
ATE446826T1 (en) | 2009-11-15 |
CN101132888A (en) | 2008-02-27 |
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