CA1107490A - Shaving apparatus - Google Patents
Shaving apparatusInfo
- Publication number
- CA1107490A CA1107490A CA330,202A CA330202A CA1107490A CA 1107490 A CA1107490 A CA 1107490A CA 330202 A CA330202 A CA 330202A CA 1107490 A CA1107490 A CA 1107490A
- Authority
- CA
- Canada
- Prior art keywords
- cutter
- lead
- cutters
- lead cutter
- leads
- 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
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 17
- 210000004209 hair Anatomy 0.000 abstract description 20
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 241000331231 Amorphocerini gen. n. 1 DAD-2008 Species 0.000 description 1
- VMXUWOKSQNHOCA-UKTHLTGXSA-N ranitidine Chemical compound [O-][N+](=O)\C=C(/NC)NCCSCC1=CC=C(CN(C)C)O1 VMXUWOKSQNHOCA-UKTHLTGXSA-N 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
- B26B19/14—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the rotary-cutter type; Cutting heads therefor; Cutters therefor
- B26B19/141—Details of inner cutters having their axes of rotation perpendicular to the cutting surface
-
- 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
- B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
- B26B19/42—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards providing for straightening the hair to be cut, e.g. by means of bristles; providing for tensioning the skin, e.g. by means of rollers, ledges
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dry Shavers And Clippers (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Lubricants (AREA)
Abstract
10.1.1979 PHN 9156 ABSTRACT:
The invention relates to a shaving apparatus comprising a drivable cutting unit with cutters, each cutter being equipped with a lead cutter which leads in the direction of driving and which is movable relative to the cutter. The lead cutters serve to slightly pull the hairs, so that a better shaving result can be obtained. The distance over which the hairs can be moved is limited by the shape and dim?n sions of the cutter and the lead cutter and by the pro-perties of the hairs and the skin. It is the object of the invention to eliminate this restriction and this leads to a construction in accordance with which each cutter, in addition to the said first lead cutter, is equipped with a second lead cutter which leads relative to the first lead cutter and which second lead cutter is movable relative to the first lead cutter.
The invention relates to a shaving apparatus comprising a drivable cutting unit with cutters, each cutter being equipped with a lead cutter which leads in the direction of driving and which is movable relative to the cutter. The lead cutters serve to slightly pull the hairs, so that a better shaving result can be obtained. The distance over which the hairs can be moved is limited by the shape and dim?n sions of the cutter and the lead cutter and by the pro-perties of the hairs and the skin. It is the object of the invention to eliminate this restriction and this leads to a construction in accordance with which each cutter, in addition to the said first lead cutter, is equipped with a second lead cutter which leads relative to the first lead cutter and which second lead cutter is movable relative to the first lead cutter.
Description
~ ~74~
.
The invention relates to a shaving apparatus of the type having a shear plate with hair entry apertures, said apparatus comprising a drivable cutting unit with cutters, each cutter being equipped with a lead cutter, which leads in the direction of driving and which is movable relative to the cutter.
; The lead cutters serve to slightly pull the hairs, so that a better shaving result can be obtained. The - distance over which the hairs can be pulled is limited by the shape and dimensions of the cutter and the lead cutter and by the properties of the hairs and the skin.
It is the object of the invention to eliminate this restriction and this leads to a construction which is characterized in that each cutter, in addition to the said first lead cutter, is equipped with a second lead . cutter which leads relative to the first lead cutter and which second lead cutter is movable relative to the first lead cutter.
A special embodiment is characterized in that each cutter is provided with more than two lead cutters, each second and further lead cutter being movable relative to ~: an adjacent preceding lead cutter.
' 74~ U
~ .
T.he invention is also embodicd by a cutting unit as used in one of the embodiments described in the foregoingt The invention will now be explained by means of a description of an embodiment shown in the Figures.
Figure 1 is an elevation of a shaving apparatus having three shear plates, Figure 2 shows the shaving apparatus of Figo 1 in side view and partly in a cross sectional view ta~en on the line II-II in Fig. 17 Figu.re 3 shows the cu-tting mem-ber with lead cutters in. perspective, Figures 4, 5 and 6 i.llustrate the operation of the lead cutters, The shaving apparatus in accordance with Figures 1 and 2 comprises a housi.ng 1~ of which a part takes the form oI a shear plate holder 2 for three shear plates 3. The shear plates 3 are formed with 20~ hair-entry apertures l~.
As i8 shown in the partial ! cross-section of Figc 2 a cutting unit 5 is situated on .~ the inner side of a shear plate 3. This cuttin.g unlt 5, which for the sake of clari.ty is only shown schematically in Fig. 2~ comprises a cutting member wi.th cutters and lead cutters, and is shown in perspective view and on an enlarged scale in Fig. 3.
The cutting unit 5 is coupled to the electric motor 10, ~y means of the hollow spindle 6 (Figo 2)~ the gear wheels 7 and 8 and the spindle 9, so that the cutting unit is rotatable relative to the associated shear plate 3O The gear wheel 7 is rotatably journalled on a pln 11, which is mounted in a mounting plate 120 T.he gear wheel 7 is formed wil;h a recess 13, which is closed by a co~er pla-~e 11!. TiJ.i.s recess accommo-dates the fl.ange 15 a-t the end o~ -the hollow spindle 6 r By gi~ing the flange 15 a noll-rou.nd~ for e,~ample, sq1lare, . .
-\
7~
, shape and by eorre~ondingly shapin.g the recess 13, a eoupli.ng is obtained for transmitting the rotary move-ment of the gear wheel 7 to the spindle 6. The spring 16, whieh for the greater part is disposed in the hollow spindle 6 and whieh is tensioned between the hollow spindle 6 and the gear wheel 7, exerts a force on the spindle 6 in the direction o~ the cutting unit 5. As the eylindrieal portion 17 of -the spindle 6 bears against the . CUttillg unit 5, said foree is exerted on the eutting unit l~ and via the eutting unit on the sh.ear plate 3, so that the shear plate is urged against the shear plate holder 2 with the rim 18. The shear plate 3 together with the eutting unit 5 and the spindle 6 ean be pressed inwards against th.e aetion of the spring 16 as a result of exernal forees, as may for example occur duri.ng use o~ the shaving apparatus..
The eoupling for t:ransmitting th.e rotary mo~ement between the spindle 6 and the eutti.ng unit 5 :is obtainecl in that the spindle 6 is provided with an end 19 of substantially rec-tangular eross-seetion. Th.is end 19 i9 sltuated in a eorresponding eoupling aperture 20 of the eutting unit 5.
The eoupling wi.th the eleetrie motor 10 deseribed in the ~oregoing is identieal :~or the three eut-ting units of the apparatus in aeeordanee with ~igures 1 and 2, the three gear wheels 7 engaging with a single eentrally disposed gear wheel 8 on the motor spindle 9.
The eu-tting uni.t 5 (Figure 3) . eomprises a cutting member 21 which is essentially con-stituted by a ceni;rQl member 22 which at its circumferenco is p.ro~ided with cutters 23. The eentral bocly 22 has a eoupling aperture 20. Each cutter 23 is pro~idecl with a ~ irst lea.d cutte:r 2ll- and a second lead cutte:c 25. The lead cutte:rs 2~l are combined to a lead cutter ~m.it 26 which compr:i.ses a central porti.on 27 to ~hich the lead.
cutters Z/l are connected by~ eans o~ the arms 2~ In a :~' P7~
similar way the lead cutters 25 form part oa a lead cutter unit 29 with a central portion 3O and arms 31.
Owing to the elastic propertles of the arms 28 and 31 the lead cutters 24 and 25 are movable relative to the associated cutters 23.
In the assembled condition of the cutting lmit the central body 22 of the cutting member 21 and the central portinn~ 27 and 3O of the lead cutter units are connected to each other ~or exa.mple by ' spotwelding.
Figures 4 5 and. 6 schematicall-y represent a side view of a part of the cut-ting unit 5 and a part of the shear plate 3 and ser~e to illustrate the operation of -the lead cutters. When a hair 32 is caught 15 in a hai.r entry aperture 4 the rotary mo~ement of the cutting unit 5 will soon bring thc hair into contact with the sharp edge 33 of the lead cutt;er 25 at the location A.
The sharp edge is such that it will slightly penetrate the ha.ir 32 with.out cutting th.e ha:ir. J~le reaction force which 20 is exerted on the lead cutter 25 by the hair 32 will be opposed to the direction of movement P. This force is to be compensated for by the component N1 of the normal force N
which is exerted on the lead cutter 25 by the guide wall 34 of the lead cutter 2l~ (~igo '~). For the sake of simplici 25 ty the slight frictional forces between the lead cutters 24 and 25 have been neglectedO The collponent N2 of the normal force N will cause the lead cutter 25 to slide along the guide wall 3'~. The angle oG between the guide wall 34 and the wall 35 of the lead cutter 2'l which engages 30 with the shear plate 3 should be smaller -than 9O.
As a result of inte~ alia the n.atural elasticity o~ the shi.n the hair 32 will be taken along by the lead cu.t-ter 25 un-til the sharp eclge 36 of the lead cutter 2'l has reached the hair 3LI at the location 35 B (Fig~ 5). Under the in~l-uence of a sllllilar sys-tem of : forces as illustrated i.n Fig. 4 the leacl cutter 2~ wil:L
: slide along the gu;.de wa:ll 37 of t;he cutter 23. l`he hair :
. , .
, .. ,..... -` ` 11~7 ' is now tal~en along by the ]ead cutter 2L~ unt~ -the cutting edge 38 of the cutter 23 h.as reached the hair at the . location C (Fig. 6). Subsequently, the hai.r 32 will be cut-off by cooperation o~ the sh.ear plate 3 and the cutter 5 23. The leng-th AB over which a hair can be pulled by a : lead cutter is inter alia limited by the dimensions of the lead cutter, in particular the thickness D (Fig. ~) ; In theory the distance AC over wh.ich a hair can be pulled can also be achieved wi.th a single lead cutter having a 1~0 thickness 2D. l`he bending moment relative to the shear plate which is exerted on the hair 32 by the :Lead cutter then ;has a maximum arm AC and is therefore theo retically twice the bendi.ng moment exerted on the hair 32 in -the case of two lead cu.tters 2L~ and 25 in accorclance with Figures ~ to 6, the maximum arm being only AB or BC, : This bending moment as a result o~ which th.e hair tends to be pressed against th.e inner side of the sh.ear plate 3 is one o~ the main limiting ~actors in re~ect o~ the length.
over which the hair can be moved. By the use o~ two or more lead cutters this length may there~ore be lncrease~ propor~
t:ionalJ.y.
.: .
~ 96~
'~
.
The invention relates to a shaving apparatus of the type having a shear plate with hair entry apertures, said apparatus comprising a drivable cutting unit with cutters, each cutter being equipped with a lead cutter, which leads in the direction of driving and which is movable relative to the cutter.
; The lead cutters serve to slightly pull the hairs, so that a better shaving result can be obtained. The - distance over which the hairs can be pulled is limited by the shape and dimensions of the cutter and the lead cutter and by the properties of the hairs and the skin.
It is the object of the invention to eliminate this restriction and this leads to a construction which is characterized in that each cutter, in addition to the said first lead cutter, is equipped with a second lead . cutter which leads relative to the first lead cutter and which second lead cutter is movable relative to the first lead cutter.
A special embodiment is characterized in that each cutter is provided with more than two lead cutters, each second and further lead cutter being movable relative to ~: an adjacent preceding lead cutter.
' 74~ U
~ .
T.he invention is also embodicd by a cutting unit as used in one of the embodiments described in the foregoingt The invention will now be explained by means of a description of an embodiment shown in the Figures.
Figure 1 is an elevation of a shaving apparatus having three shear plates, Figure 2 shows the shaving apparatus of Figo 1 in side view and partly in a cross sectional view ta~en on the line II-II in Fig. 17 Figu.re 3 shows the cu-tting mem-ber with lead cutters in. perspective, Figures 4, 5 and 6 i.llustrate the operation of the lead cutters, The shaving apparatus in accordance with Figures 1 and 2 comprises a housi.ng 1~ of which a part takes the form oI a shear plate holder 2 for three shear plates 3. The shear plates 3 are formed with 20~ hair-entry apertures l~.
As i8 shown in the partial ! cross-section of Figc 2 a cutting unit 5 is situated on .~ the inner side of a shear plate 3. This cuttin.g unlt 5, which for the sake of clari.ty is only shown schematically in Fig. 2~ comprises a cutting member wi.th cutters and lead cutters, and is shown in perspective view and on an enlarged scale in Fig. 3.
The cutting unit 5 is coupled to the electric motor 10, ~y means of the hollow spindle 6 (Figo 2)~ the gear wheels 7 and 8 and the spindle 9, so that the cutting unit is rotatable relative to the associated shear plate 3O The gear wheel 7 is rotatably journalled on a pln 11, which is mounted in a mounting plate 120 T.he gear wheel 7 is formed wil;h a recess 13, which is closed by a co~er pla-~e 11!. TiJ.i.s recess accommo-dates the fl.ange 15 a-t the end o~ -the hollow spindle 6 r By gi~ing the flange 15 a noll-rou.nd~ for e,~ample, sq1lare, . .
-\
7~
, shape and by eorre~ondingly shapin.g the recess 13, a eoupli.ng is obtained for transmitting the rotary move-ment of the gear wheel 7 to the spindle 6. The spring 16, whieh for the greater part is disposed in the hollow spindle 6 and whieh is tensioned between the hollow spindle 6 and the gear wheel 7, exerts a force on the spindle 6 in the direction o~ the cutting unit 5. As the eylindrieal portion 17 of -the spindle 6 bears against the . CUttillg unit 5, said foree is exerted on the eutting unit l~ and via the eutting unit on the sh.ear plate 3, so that the shear plate is urged against the shear plate holder 2 with the rim 18. The shear plate 3 together with the eutting unit 5 and the spindle 6 ean be pressed inwards against th.e aetion of the spring 16 as a result of exernal forees, as may for example occur duri.ng use o~ the shaving apparatus..
The eoupling for t:ransmitting th.e rotary mo~ement between the spindle 6 and the eutti.ng unit 5 :is obtainecl in that the spindle 6 is provided with an end 19 of substantially rec-tangular eross-seetion. Th.is end 19 i9 sltuated in a eorresponding eoupling aperture 20 of the eutting unit 5.
The eoupling wi.th the eleetrie motor 10 deseribed in the ~oregoing is identieal :~or the three eut-ting units of the apparatus in aeeordanee with ~igures 1 and 2, the three gear wheels 7 engaging with a single eentrally disposed gear wheel 8 on the motor spindle 9.
The eu-tting uni.t 5 (Figure 3) . eomprises a cutting member 21 which is essentially con-stituted by a ceni;rQl member 22 which at its circumferenco is p.ro~ided with cutters 23. The eentral bocly 22 has a eoupling aperture 20. Each cutter 23 is pro~idecl with a ~ irst lea.d cutte:r 2ll- and a second lead cutte:c 25. The lead cutte:rs 2~l are combined to a lead cutter ~m.it 26 which compr:i.ses a central porti.on 27 to ~hich the lead.
cutters Z/l are connected by~ eans o~ the arms 2~ In a :~' P7~
similar way the lead cutters 25 form part oa a lead cutter unit 29 with a central portion 3O and arms 31.
Owing to the elastic propertles of the arms 28 and 31 the lead cutters 24 and 25 are movable relative to the associated cutters 23.
In the assembled condition of the cutting lmit the central body 22 of the cutting member 21 and the central portinn~ 27 and 3O of the lead cutter units are connected to each other ~or exa.mple by ' spotwelding.
Figures 4 5 and. 6 schematicall-y represent a side view of a part of the cut-ting unit 5 and a part of the shear plate 3 and ser~e to illustrate the operation of -the lead cutters. When a hair 32 is caught 15 in a hai.r entry aperture 4 the rotary mo~ement of the cutting unit 5 will soon bring thc hair into contact with the sharp edge 33 of the lead cutt;er 25 at the location A.
The sharp edge is such that it will slightly penetrate the ha.ir 32 with.out cutting th.e ha:ir. J~le reaction force which 20 is exerted on the lead cutter 25 by the hair 32 will be opposed to the direction of movement P. This force is to be compensated for by the component N1 of the normal force N
which is exerted on the lead cutter 25 by the guide wall 34 of the lead cutter 2l~ (~igo '~). For the sake of simplici 25 ty the slight frictional forces between the lead cutters 24 and 25 have been neglectedO The collponent N2 of the normal force N will cause the lead cutter 25 to slide along the guide wall 3'~. The angle oG between the guide wall 34 and the wall 35 of the lead cutter 2'l which engages 30 with the shear plate 3 should be smaller -than 9O.
As a result of inte~ alia the n.atural elasticity o~ the shi.n the hair 32 will be taken along by the lead cu.t-ter 25 un-til the sharp eclge 36 of the lead cutter 2'l has reached the hair 3LI at the location 35 B (Fig~ 5). Under the in~l-uence of a sllllilar sys-tem of : forces as illustrated i.n Fig. 4 the leacl cutter 2~ wil:L
: slide along the gu;.de wa:ll 37 of t;he cutter 23. l`he hair :
. , .
, .. ,..... -` ` 11~7 ' is now tal~en along by the ]ead cutter 2L~ unt~ -the cutting edge 38 of the cutter 23 h.as reached the hair at the . location C (Fig. 6). Subsequently, the hai.r 32 will be cut-off by cooperation o~ the sh.ear plate 3 and the cutter 5 23. The leng-th AB over which a hair can be pulled by a : lead cutter is inter alia limited by the dimensions of the lead cutter, in particular the thickness D (Fig. ~) ; In theory the distance AC over wh.ich a hair can be pulled can also be achieved wi.th a single lead cutter having a 1~0 thickness 2D. l`he bending moment relative to the shear plate which is exerted on the hair 32 by the :Lead cutter then ;has a maximum arm AC and is therefore theo retically twice the bendi.ng moment exerted on the hair 32 in -the case of two lead cu.tters 2L~ and 25 in accorclance with Figures ~ to 6, the maximum arm being only AB or BC, : This bending moment as a result o~ which th.e hair tends to be pressed against th.e inner side of the sh.ear plate 3 is one o~ the main limiting ~actors in re~ect o~ the length.
over which the hair can be moved. By the use o~ two or more lead cutters this length may there~ore be lncrease~ propor~
t:ionalJ.y.
.: .
~ 96~
'~
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A shaving apparatus of the type having a shear plate with hair-entry apertures, said apparatus comprising a drivable cutting unit with cutters, each cutter being equipped with a lead cutter, which leads in the direction of driving and which is movable relative to the cutter, characterized in that each cutter, in addition to the said first lead cutter, is equipped with a second lead cutter which leads relative to the first lead cutter and which second lead cutter is movable relative to the first lead cutter.
2. A shaving apparatus as claimed in Claim 1, characterized in that each cutter is provided with more than two lead cutters, each second and further lead cutter being movable relative to the adjacent preceding lead cutter.
3. A cutting unit as used in a shaving apparatus as claimed in claim 1 or 2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7806774 | 1978-06-23 | ||
| NL7806774A NL7806774A (en) | 1978-06-23 | 1978-06-23 | SHAVER. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1107490A true CA1107490A (en) | 1981-08-25 |
Family
ID=19831103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA330,202A Expired CA1107490A (en) | 1978-06-23 | 1979-06-20 | Shaving apparatus |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0006661B1 (en) |
| JP (1) | JPS552498A (en) |
| AT (1) | ATE94T1 (en) |
| CA (1) | CA1107490A (en) |
| DE (1) | DE2960428D1 (en) |
| ES (1) | ES254562Y (en) |
| NL (1) | NL7806774A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7909059A (en) * | 1979-12-17 | 1981-07-16 | Philips Nv | SHAVER. |
| JPH0696874B2 (en) * | 1986-05-26 | 1994-11-30 | ド−ピ−建設工業株式会社 | Box carboad connection method |
| JPH01192929A (en) * | 1988-01-28 | 1989-08-03 | P S Concrete Co Ltd | Buried box path |
| WO2004012914A1 (en) * | 2002-07-29 | 2004-02-12 | Koninklijke Philips Electronics N.V. | Shaving apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3088205A (en) * | 1961-09-15 | 1963-05-07 | Ellis Robert | Dry shaver with hair pulling means to aid in cutting the hair |
| NL7404657A (en) * | 1974-04-05 | 1975-10-07 | Philips Nv | DRY SHAVER. |
-
1978
- 1978-06-23 NL NL7806774A patent/NL7806774A/en not_active Application Discontinuation
-
1979
- 1979-06-20 EP EP79200319A patent/EP0006661B1/en not_active Expired
- 1979-06-20 AT AT79200319T patent/ATE94T1/en not_active IP Right Cessation
- 1979-06-20 JP JP7799479A patent/JPS552498A/en active Granted
- 1979-06-20 DE DE7979200319T patent/DE2960428D1/en not_active Expired
- 1979-06-20 CA CA330,202A patent/CA1107490A/en not_active Expired
- 1979-06-21 ES ES1979254562U patent/ES254562Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0006661B1 (en) | 1981-06-24 |
| JPS6244511B2 (en) | 1987-09-21 |
| ATE94T1 (en) | 1981-07-15 |
| JPS552498A (en) | 1980-01-09 |
| ES254562Y (en) | 1981-10-16 |
| NL7806774A (en) | 1979-12-28 |
| EP0006661A3 (en) | 1980-01-23 |
| DE2960428D1 (en) | 1981-10-01 |
| EP0006661A2 (en) | 1980-01-09 |
| ES254562U (en) | 1981-04-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |