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
  • B26B21/38—Safety razors with one or more blades arranged transversely to the handle with provision for reciprocating the blade by means other than rollers
• • 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
• • 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

Definitions

• Shaving head with jointly drivable cutting member and hair manipulator
• the invention relates to a shaving head provided with a cutting member having a cutting edge for cutting hairs growing from skin, and with a hair manipulator which, viewed in a displacement direction of the shaving head, is arranged in front of the cutting edge and which is drivable in a direction substantially parallel to the cutting edge for moving the hairs in a direction substantially parallel to the cutting edge.
• the invention also relates to a shaver comprising a shaving head and a drive mechanism for driving the shaving head, which shaving head is provided with a cutting member having a cutting edge for cutting hairs growing from skin, and with a hair manipulator which, viewed in a displacement direction of the shaving head, is arranged in front of the cutting edge and which is drivable, by means of the drive mechanism, in a direction substantially parallel to the cutting edge for moving the hairs in a direction substantially parallel to the cutting edge.
• a shaving head and a shaver of the types mentioned in the opening paragraphs are known from EP-A-0 855 256.
• the cutting member of the known shaving head and the known shaver is arranged in a fixed position in the shaving head.
• the hair manipulator comprises a comb which is arranged parallel to the cutting edge and which comprises teeth extending substantially perpendicularly to the cutting edge.
• the teeth are arranged at a relatively small distance from each other, so that reciprocating movements of the hairs in a direction substantially parallel to the cutting edge are generated by means of the hair manipulator and, during cutting, the hairs are reciprocated along the cutting edge.
• a cutting force necessary in the displacement direction for cutting the hairs is limited substantially, which results in a substantial improvement of the shaving performance and the shaving comfort of the shaving head.
• the hair manipulator also provides protection against incised wounds and skin irritations. During the displacement of the shaving head over the skin, the hair manipulator smoothes the skin directly in front of the cutting edge in a direction parallel to the displacement direction, so that relatively large skin creases in front of the cutting edge, which might cause incised wounds, are largely precluded.
• the hair manipulator smoothes the skin directly in front of the cutting edge also in a direction parallel to the cutting edge, so that also relatively small skin creases between the teeth of the hair manipulator, which might cause minor incised wounds or skin irritations, are largely precluded.
• a drawback of the known shaving head and the known shaver resides in that the above-mentioned shaving performance and protection against incised wounds and skin irritations can only be achieved if the hair manipulator, which is drivable with respect to the cutting member, is situated, viewed in directions perpendicular to the cutting edge, in an accurately determined position with respect to the cutting member, with only a relatively small distance between the hair manipulator and the cutting member being permissible, viewed particularly in a direction perpendicular to the cutting edge and perpendicular to the displacement direction.
• the shaving head must comprise a very accurate guide for displacements of the hair manipulator with respect to the cutting member, so that very high requirements are imposed regarding the accuracy of the construction used and regarding the permissible dimensional tolerances in the manufacture of the shaving head.
• the construction of the shaving head, and the manufacture thereof, are relatively complicated.
• a shaving head in accordance with the invention is characterized in that the hair manipulator is arranged in a fixed position with respect to the cutting member, with the cutting member and the hair manipulator being jointly drivable in a direction substantially parallel to the cutting edge.
• a shaver in accordance with the invention is characterized in that the shaving head used therein is a shaving head in accordance with the invention.
• the shaving head does not have to comprise an accurate guide for displacements of the hair manipulator with respect to the cutting member.
• the hair manipulator is, for example, secured in a fixed position to the cutting member, so that a desirable, accurate position of the hair manipulator with respect to the cutting member is achieved in a comparatively simple and reliable manner. Since it has been found that the position of the cutting member / hair manipulator unit thus obtained with respect to the shaving head does not have to be nearly as accurate as the position of the hair manipulator with respect to the cutting member, the shaving head may be provided with a comparatively simple guide for joint displacements of the cutting member and the hair manipulator with respect to the shaving head.
• a particular embodiment of a shaving head in accordance with the invention is characterized in that the hair manipulator and the cutting member are integrated into a single part. In the manufacture of said part, the hair manipulator can be relatively readily provided or formed on the cutting member with the desired accuracy. This results in a substantial further simplification of the construction and the assembly of the shaving head.
• a particular embodiment of a shaver in accordance with the invention is characterized in that the shaver is provided with means for generating reciprocating displacements of the cutting member, which displacements at least comprise a component in a direction parallel to the displacement direction of the shaving head.
• Fig. 1 shows an embodiment of a shaver in accordance with the invention, which is provided with a shaving head in accordance with the invention
• Fig. 2 shows a part of the shaving head of the shaver shown in Fig. 1,
• Fig. 3a shows an integrated part of a further embodiment of a shaving head in accordance with the invention.
• Fig. 3b is a sectional view taken on the line Illb-IIIb in Fig. 3a.
• Fig. 1 shows an embodiment of a shaver 1 in accordance with the invention, which comprises a housing 3 on which a shaving head 5 in accordance with the invention is detachably secured by means of securing means 7 which, for the sake of simplicity, are only diagrammatically shown in the Figure and may be of a customary type which is known per se.
• the housing 3 accommodates an electric motor 9, a battery 11 for feeding the motor 9, and an electric control unit 13 for controlling the motor 9.
• the motor 9 can be switched on and off by means of a switch 15 provided on the housing 3.
• the shaving head 5 is provided with a cutting member 17, which is plate-shaped in the embodiment shown and provided with a straight cutting edge 19 for cutting hairs growing from skin.
• the cutting edge 19 extends parallel to an X-direction which is perpendicular to a displacement or shaving direction Y of the shaving head 5.
• the shaving head 5 further comprises a hair manipulator 21 which, in the embodiment shown, is provided with a comb 23. Said comb 23 is provided on a carrier 25 of the hair manipulator 21 and provided with teeth 27 which extend substantially perpendicularly to the cutting edge 19 and which are arranged, viewed in the displacement direction Y of the shaving head 5, directly in front of the cutting edge 19.
• the teeth 27 are provided substantially throughout the length of the cutting edge 19, but in Fig. 2 only a few teeth 27 are shown for the sake of simplicity.
• the cutting member 17 is secured in a fixed position on the carrier 25 of the hair manipulator 21, so that the comb 23 of the hair manipulator 21 is arranged in a fixed position with respect to the cutting member 17.
• the plate-shaped cutting member 17 is secured, in the embodiment shown, to a flat upper side 29 of the carrier 25 by means of securing means 31 , which are only diagrammatically shown in the Figs. 1 and 2 and may be of a customary type which is known per se.
• the carrier 25 is displaceably guided with respect to a frame 33 of the shaving head 5 and is provided, for this purpose, with guiding members 35, 37 for co-operation with guide grooves 39, 41 which extend parallel to the X-direction and are provided in the frame 33.
• the carrier 25 is drivable in a direction parallel to the X-direction by means of a drive mechanism 43 of the shaver 1, which is arranged in the housing 3 and comprises the above-mentioned motor 9.
• the drive mechanism 43 further comprises an outgoing shaft 45 of the motor 9 and a pin 47, which is eccentrically provided on said drive mechanism, and which serves to co-operate with a groove 49 formed in the carrier 25.
• the groove 49 has a width which corresponds to a diameter of the pin 47, so that a rotation of the outgoing shaft 45 of the motor 9 is converted to reciprocating joint displacements of the hair manipulator 21 and the cutting member 17 secured thereto with respect to the frame 33 of the shaving head 5 in a direction parallel to the X-direction.
• the hair manipulator 21 When a user moves the shaver 1 with the shaving head 5 in the displacement direction Y over a skin 51 to be treated, the hair manipulator 21 provides protection against incised wounds and skin irritations. Since the hair manipulator 21 is arranged directly in front of the cutting edge 19 of the cutting member 17, viewed in the displacement direction Y, the hair manipulator 21 smoothes the skin 51 directly in front of the cutting edge 19 in a direction parallel to the displacement direction Y, so that relatively large skin creases in front of the cutting edge 19, which could be subject to incised wounds inflicted by the cutting edge 19, are largely precluded.
• the hair manipulator 21 Since the hair manipulator 21 is reciprocated in a direction parallel to the cutting edge 19, the hair manipulator 21 smoothes the skin 51 directly in front of the cutting edge 19 also in a direction parallel to the cutting edge 19, so that also relatively small skin creases between the teeth 27 of the hair manipulator 21. which could lead to smaller incised wounds or skin irritations, are also largely precluded.
• hairs present on the skin 51 such as the hair 53 shown in Fig. 1, are caught between the teeth 27 of the hair manipulator 21 and thus reach the cutting edge 19 which subsequently cuts the hairs.
• a sufficient protective effect of the hair manipulator 21 is obtained, for example, if the width of and the interspace between the teeth 27, viewed in a direction parallel to the X-direction, ranges between 0.1 and 0.4 mm, the hair manipulator 21 being reciprocated at a frequency of approximately 100 Hz or higher, and an amplitude between approximately 0.05 mm and 0.250 mm.
• a sufficient protective effect of the hair manipulator 21 is achieved only if the teeth 27 of the hair manipulator 21 are in a predetermined accurate position with respect to the cutting edge 19 of the cutting member 17.
• a slit 55 shown in Fig. 1, which is situated between the cutting edge 19 and the teeth 27, viewed at right angles to the cutting edge 19, must be smaller than a predetermined relatively small limiting value. Since the cutting member 17 and the hair manipulator 21 are secured in fixed positions with respect to each other in the shaving head 5 in accordance with the invention by means of securing means 31. the necessary accurate position of the teeth 27 with respect to the cutting edge 19 can be relatively readily and reliably achieved during the manufacture of the shaving head 5 by means of relatively simple securing means 31.
• the protective effect of the hair manipulator 21 is achieved by means of a manufacturing process for the shaving head 5 and a construction of the shaving head 5 which are much simpler than a manufacturing process and a construction necessary for a shaving head with a comparable protective effect, such as the known shaving head disclosed in EP-A-0 855 256, in which the cutting member is arranged in a fixed position in the shaving head and a very accurate guidance of the hair manipulator with respect to the cutting member must be applied.
• the hairs caught between the teeth 27 of the hair manipulator 21 are reciprocated by said hair manipulator 21 in a direction substantially parallel to the cutting edge 19.
• the shaver 1 is provided with means 57 for generating reciprocating movements of the cutting member 17 in a direction parallel to the displacement direction Y. It has been found that the necessary cutting forces are limited substantially under the influence of such displacements of the cutting member 17 in a direction parallel to the displacement direction Y.
• said means 57 are constructed in a particularly simple way.
• said means 57 comprising an imbalance mass 59 which is eccentrically secured to the outgoing shaft 45 of the motor 9.
• said means may alternatively be differently embodied.
• a transmission may be applied between the motor and said means and/or between the motor and the hair manipulator, which transmission enables a desired frequency ratio between the displacements of the cutting member parallel to the X-direction and parallel to the Y-direction to be obtained.
• the cutting member 17 and the hair manipulator 21 are two separate parts which are secured to one another during the manufacture of the shaving head 5.
• the invention also comprises embodiments wherein the cutting member and the hair manipulator are integrated into a single part, resulting in a substantial further simplification of the construction and the assembly of the shaving head.
• An example of such an integrated part 61 which is used in a further embodiment of a shaving head in accordance with the invention, is shown in Figs. 3a and 3b.
• the further embodiment of the shaving head is substantially identical in other repects to the above-described shaving head 5.
• the integrated part 61 comprises a plate-shaped metal carrier 63 wherein grooves 65 are formed by means of a customary machining operation which is known per se, and rounded teeth 67 being provided on this plate-shaped metal carrier by means of a customary machining process which is known per se.
• the integrated part 61 further comprises guide members, not shown in the Figures, for guiding the part 61 with respect to the shaving head in a direction parallel to the cutting edges 71.

Landscapes

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

Priority Applications (1)

Applications Claiming Priority (4)

Publications (1)

Family

ID=8240485

Family Applications (1)

Country Status (11)

Families Citing this family (2)

Family Cites Families (3)

• 2000
  • 2000-07-17 CN CN00801458A patent/CN1318007A/zh active Pending
  • 2000-07-17 AU AU66947/00A patent/AU6694700A/en not_active Abandoned
  • 2000-07-17 KR KR1020017003585A patent/KR20010075239A/ko not_active Application Discontinuation
  • 2000-07-17 EA EA200100381A patent/EA200100381A1/ru unknown
  • 2000-07-17 WO PCT/EP2000/006810 patent/WO2001007213A1/en not_active Application Discontinuation
  • 2000-07-17 BR BR0006929-9A patent/BR0006929A/pt not_active Application Discontinuation
  • 2000-07-17 CZ CZ20011011A patent/CZ20011011A3/cs unknown
  • 2000-07-17 JP JP2001512073A patent/JP2003505163A/ja not_active Withdrawn
  • 2000-07-17 MX MXPA01003085A patent/MXPA01003085A/es unknown
  • 2000-07-17 EP EP00954522A patent/EP1115536A1/en not_active Withdrawn
  • 2000-07-21 AR ARP000103754A patent/AR024891A1/es unknown

Non-Patent Citations (1)

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