MXPA01003085A

MXPA01003085A - Shaving head with jointly drivable cutting member and hair manipulator.

Info

Publication number: MXPA01003085A
Application number: MXPA01003085A
Authority: MX
Inventors: Pragt Johan
Original assignee: Koninkl Philips Electronics Nv
Priority date: 1999-07-22
Filing date: 2000-07-17
Publication date: 2005-07-29
Also published as: CN1318007A; WO2001007213A1; BR0006929A; CZ20011011A3; JP2003505163A; KR20010075239A; AU6694700A; EA200100381A1; AR024891A1; EP1115536A1

Abstract

The invention relates to a shaving head (5) which comprises a cutting member (17) having a cutting edge (19) for cutting hairs (53) growing from human skin (51). The shaving head (5) also comprises a hair manipulator (21) which is arranged in front of the cutting edge, viewed in a shaving direction (Y) of the shaving head. The hair manipulator can be driven in a direction parallel to the cutting edge to move the hairs in a direction substantially parallel to the cutting edge, and protects the skin against incised wounds and irritations. According to the invention, the hair manipulator is arranged in a fixed position with respect to the cutting member, the hair manipulator and the cutting member being jointly drivable in a direction parallel to the cutting edge. In this manner, an accurately defined position of the hair manipulator relative to the cutting member, which is necessary for a safe operation of the shaving head, can be obtained in a simple and reliable manner without the use of an accurate construction of the shaving head. The shaving head is used in a shaver (1) according to the invention, which further comprises driving means (43) for driving the shaving head.

Description

RASURING HEAD WITH COUPLING CONDUCTIVABLE CUTTING MEMBER AND HAIR HANDLING.

The invention relates to a shaving head provided with a cutting member having a cutting edge for cutting hair that grows from the skin, and with a manipulator which, viewed from a direction of travel of the cutting head, is positioned in front of the cutting edge and which is conductive in a direction substantially parallel to the cutting edge to move the hair in a direction substantially parallel to the cutting edge. The invention also relates to a shaver comprising a shaving head and a driving mechanism for driving the shaving head, said shaving head is provided with a cutting member having a cutting edge for cutting the hair growing from the shaving head. the skin, and with a hair manipulator which, viewed from a direction of displacement of the shaving head, is accommodated in front of the cutting edge and which is conductive, by the driving mechanism, in a direction substantially parallel to the edge of cutting to move the hair in a direction substantially parallel to the cutting edge.

A shaving head and 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 accommodated in a fixed position on the head to shave. The hair manipulator comprises a comb that is placed parallel to the cutting edge and that is composed of teeth that extend substantially perpendicular to the cutting edge. By means of the driving mechanism, alternative movements of the hair manipulator are generated with respect to the cutting member, in operation, in a direction parallel to the cutting edge. When a user moves the shaving head on the skin in the direction of travel, the hairs are first trapped between the teeth of the hair manipulator. The teeth are positioned at a relatively short distance from one another, so that then the alternate movements of the hair in substantially parallel direction to the cutting edge are generated by the hair manipulator and, during cutting, the hair is alternated as length of the cut edge. As a result, a cutting force n would cease in the direction of travel to cut the hair is substantially limited, which results in a significant improvement of the shaving performance and shaving comfort of the shaving head. The hair manipulator also provides protection against injuries and skin irritation. During the movement of the shaving head on the skin, the hair manipulator softens the skin directly opposite the cutting edge and in a direction parallel to the direction of travel, so that relatively large skin folds in front of the cutting edge , which can cause injuries, be prevented. As the hair manipulator is alternated in a direction parallel to the cutting edge, the manipulator softens the skin directly opposite the cutting edge also in a direction parallel to the cutting edge, so that the creases are also prevented relatively small skin between the teeth of the hair manipulator, which can cause minor injuries or irritation of the skin. A disadvantage of the shaving head and the known shaver resides in that the performance of the aforementioned shaving and protection against wounds and irritation of the skin can only be achieved if the hair manipulator, which is conductive with respect to the cutting member, is located, viewed in directions perpendicular to the cutting edge, at a precise position with respect to the cutting member, only allowing a relative short distance between the hair manipulator and the cutting member, seen in particular in a direction perpendicular to the cut edge and perpendicular to the direction of travel. For this reason, the cutting head must comprise a guide for displacements of the hair manipulator with respect to the cutting member, so that very high requirements are imposed with respect to the accuracy of the construction used and with respect to the dimensional tolerances permissible in the manufacture of the shaving head. As a result, the construction of the shaving head, and the manufacture thereof, is relatively complicated.

It is an object of the invention to provide a shaving head and a shaver of the types mentioned in the opening paragraphs, whereby a high degree of production against wounds and irritations of the skin is also provided, while, in addition, the disadvantage Above mentioned of the well-known head of shaving and shaver is prevented as much as possible. To achieve this objective, a shaving head according to the invention is characterized in that the hair manipulator is placed in a fixed position with respect to the cutting member, with the cutting member and the hair manipulator being driven together in a direction substantially parallel to the cutting edge. To achieve this objective, a shaver according to the invention is characterized in that the shaving head used in this is a shaving head according to the invention. Since the hair manipulator is placed in a fixed position with respect to the cutting member, the cutting head does not have to be composed of an exact guide for displacements of the hair manipulator with respect to the cutting member. In the manufacture of the cutting head, the header manipulator is, for example, secured in a fixed position to the cutting member, so that an exact and desirable position of the hair manipulator with respect to the cutting member is achieved from a Comparatively simple and reliable way. Since it has been discovered that the position of the cutting member / unit of the hair manipulator then obtained with respect to the shaving head does not have to be as exact as the position of the hair manipulator with respect to the cutting member, the head of the Shaving 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. Since the cutting member and the hair manipulator can be driven together in a direction substantially parallel to the cutting edge, the skin folds are prevented by the hair manipulator when the shaving head is moved on the skin, so that, as in the known shaving head and shaver, the hair manipulator provides a high degree of protection against skin injuries and irritations. A particular characterization of a shaving head according to the invention is characterized in that the hair manipulator and the cutting member are integrated in a single part. In the manufacture of said part, the hair manipulator can be provided or formed in the cutting member with the desired accuracy. This results in a further important simplification of the construction and assembly of the shaving head. A particular characterization of a shaver according to the invention is characterized in that the shaver is provided with means to generate alternative shifts of the cutting member, said shifts at least comprising a component in a direction parallel to the direction of displacement of the head to shave. As a result of said reciprocating movements of the cutting member in a direction parallel to the direction of travel of the shaving head, the necessary cutting force in the direction of travel to cut the hair is severely limited, resulting in an improvement substantial shaving performance and shaving comfort of the shaver. These and other aspects of the invention will be apparent and elucidated with reference to the characterizations described hereinafter. In the drawings: Fig. 1 shows a characterization of a shaver according to the invention, which is provided with a shaving head according to 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 another characterization of a shaving head according to the invention, and Fig. 3b is a sectional view taken on line III-III in Fig. 3a.

Fig. 1 shows a characterization of a shaver 1 according to the invention, which comprises a structure 3 in which the shaving head 5 according to the invention is removably secured by means of the security means 7 which , for simplicity, they are only shown as a diagram in the Figure and can be of a traditional type that is known per se. The structure 3 accommodates an electric motor 9, a battery 11 for feeding the motor 9, and an electrical control unit 13 for controlling the motor 9. The motor 9 can be turned on or off by a switch 15 provided in the structure 3.

As shown in Figs. 1 and 2, the shaving head 5 is provided with a cutting member 17, which has the shape of a plate in the characterization shown and provided with a right cutting edge 19 for cutting hair growing on the skin. The cutting edge 19 extends in a parallel manner in the X direction which is perpendicular to a shaving direction Y of the shaving head 5. The shaving head 5 further comprises a hair manipulator 21 which, in the characterization shown, it 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 perpendicular to the cutting edge 19 and which are positioned, seen in a direction of travel And of the shaving head 5, directly in front of the cutting edge 19. It should be noted that the teeth 27 are provided substantially over the entire length of the cutting edge, but only a few teeth 27 are shown in FIG. show it in a simple way As shown in Figs. 1 and 2, the cutting member 17 is secured in a fixed position in the holder 25 of the hair manipulator 21, so that the comb 23 of the hair manipulator 21 is placed in a fixed position with respect to the cutting member 17. The plate-shaped cutting member 17 is secured, in the characterization shown, to a flat upper side 29 of the carrier 25 by means of the security means 31, which are only shown diagrammatically in FIGS. 1 and 2 and they can be of the traditional type that are known per se. Seen in a direction parallel to the X direction, the carrier 25 is guided with respect to the structure 33 of the shaving head 5 and is provided, for this purpose, with guide members 35, 37 to cooperate with the guide slots 39, 41 which extend parallel to the X direction and are provided in the structure 33. The carrier 25 is conductive in a direction parallel to the X direction by a driving mechanism 43 of the shaveOra 1, which is placed in the structure 3 and it comprises the motor 9 mentioned above. The driving mechanism 43 ad plus comprises an output shaft 45 of the motor 9 and a pin 47, which is provided eccentrically in said driving mechanism, and which serves to cooperate with a slot 49 formed in the carrier 25. View in a direction parallel to the X direction, the slot 49 has a width corresponding to the diameter of the pin 47, so that a rotation of the output shaft 45 of the motor 9 is converted for alternate joint movements of the hair manipulator 21 and the member of cutting 17 secured thereto with respect to the structure 33 of the shaving head 5 in a direction parallel to the X direction. When a user moves the shaver 1 with the shaving head 5 in the direction of travel Y on a skin 51 to be treated, the hair manipulator 21 provides protection against cuts and irritations of the skin. Since the hair manipulator 21 is directly accommodated by facing the cutting edge 19 of the cutting member 17, seen in the direction of displacement Y, the hair manipulator 21 softens the skin 51 directly opposite the cutting edge 19. in a direction parallel to the direction of travel Y, so that large folds of skin in front of the cutting edge 19, which may be subject to wounds produced by the cutting edge 19, are greatly prevented. Since the hair manipulator 21 is alternated in a direction parallel to the cutting edge 19, the hair manipulator 21 softens the skin 51 directly in front of the cutting edge 19 also in a direction parallel to the cutting edge 19, so as to that then relatively small folds between the teeth 27 of the hair manipulator 21, which can carry with it wounds or irritation of the skin, are also greatly prevented. When the cutting head 5 moves on the skin 51, the hair present on the skin 51, like the hair 53 shown in Fig. 1 is caught between the teeth 27 of the hair manipulator 21 and therefore this reaches the cut edge 19 that subsequently cuts the hair. A sufficient protective effect is obtained in the manipulator 21, for example, if the width and the space between the teeth 27, seen in a direction parallel to the X direction, variations between 0.1 and 0.4 mm, the hair manipulator 21 is alternated in a frequency of approximately 100 Hz or more, and an amplitude between approximately 0.05 mm and 0.250 mm. It has been found that 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 exact position with respect to the cutting edge 19 of the cutting member 17. In particular a slit 55 , shown in Fig. 1, which is located between the cutting edge 19 and the teeth 27, seen at the right angles to the cutting edge 19, must be smaller than a predetermined relatively small limit value. Since the cutting member 17 and the manipulator 21 are secured in fixed positions with respect to each other on the shaving head 5 according to the invention by means of the safety means 31, the exact necessary position of the teeth 27 with with respect to the cutting edge 19 it can be achieved in a relatively ready and reliable manner during the manufacture of the shaving head 5 by relatively simple safety means 31. Since it has been found that a considerably less accurate position of the cutting member 17 and the hair manipulator 21 attached thereto with respect to the structure 33 of the shaving head 5 is permissible, a comparatively small accuracy of the guide members 35, 37 of the hair manipulator 21 and of the guide slots 39, 41 of the structure 33. Therefore, with respect to the shaving head 5, the protective effect of the hair manipulator 21 is achieved by a manufacturing process for the hair 5 and a construction necessary for a shaving head with a comparable protective effect, such as the known shaving head described in EP-A-0 855 256, in which the cutting member is accommodated in a fixed position in a shaving head and a very accurate guide of the hair manipulator must be applied with respect to the cutting member. In the shaving head 5 according to the invention, the hair trapped between the teeth 27 of the hair manipulator 21 are alternated by said hair manipulator 21 in a direction substantially parallel to the cutting edge 19. As the cutting member 17 and the hair manipulator 21 are secured in fixed positions with respect to one another, the hairs are almost not alternating along the cutting edge 19, so that then the shaving head 5 does not limit the cutting forces necessary. the manner in which the known shaving head of EP-A-0 855 256 does so. To still achieve a limitation of the cutting forces in a direction parallel to the direction of displacement Y of the shaving head 5, the shaving knife 1 is provided with means 57 for generating reciprocating movements of the cutting member 17 in a direction parallel to the direction of displacement Y. It has been found that the necessary cutting forces are substantially limited Under the influence of said displacements of the cutting member 17 in a direction parallel to the direction of displacement Y. In the characterization shown, said means 57 are constructed in a particularly simple manner, said means 57 comprise an unbalance mass 59 which is secured eccentrically to the output shaft 45 of the motor 9. However, said means can alternatively be characterized differently. Furthermore, in other characterizations wherein the motor drives the hair manipulator and said means, a transmission can be applied between the motor and said means and / or between the motor and the hair manipulator, said transmission enables a desired frequency of radius between the displacements of the cutting member parallel to the X direction and parallel to the Y direction to be obtained.

In the shaving head 5 described above according to the invention, the cutting moulder 17 and the hair manipulator 21 are two separate parts which are secured to one another during the manufacture of the shaving head 5. However, the invention also comprises characterizations wherein the cutting member and the hair manipulator are integrated into a single part, resulting in a further substantial simplification of the construction and assembly of the shaving head. An example of such an integrated part 61, which is used in a further characterization of the shaving head according to the invention, is shown in Figs. 3a and 3b. The other characterization of the shaving head is substantially identical in other respects to the shaving head 5 described above. The integrated part 61 comprises a plate-shaped metal carrier 63 in which grooves 65 are formed by a traditional machining operation which is known per se, and with rounded teeth 67 which are provided in this plate-shaped metal carrier by a traditional styling process that is known per se. In addition, an upper side 69 of the carrier 63 is processed in such a way that a cutting edge 71 is formed between each pair of adjacent teeth 67. 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.

Claims

CHAPTER REVINDICATOR Having described the invention, it is considered as a novelty and, therefore, the content is claimed in the following: 5 CLAIMS. A shaving head provided with a cutting member having a cutting edge for cutting hair growing on the skin and with a hair manipulator which, viewed in a direction of displacement of the shaving head, is placed in front of the edge of cutting and that is conductive in a direction substantially parallel to the edge of ^ 0 cut to move the hair in a direction substantially parallel to the cutting edge, characterized in that the hair manipulator is placed in a fixed position with respect to the cutting member, with the cutting member and the hair manipulator being conductible jointly in a direction substantially parallel to the cutting edge.
2. A shaving head as claimed in claim 1, characterized in that the hair manipulator and the cutting member are integrated in a single part.
3. A shaver comprising a shaving head and a driving mechanism for driving the shaving head, the shaving head is provided with a cutting member having a cutting edge for cutting the hair growing on the skin and with a hair manipulator which, seen in a direction of displacement of the head of hair, is placed in front of the cut edge and which is conductive, by means of the driving mechanism, in a direction substantially parallel to the cutting edge for moving the hair in a direction substantially parallel to the cutting edge, characterized in that the shaving head is a shaving head as claimed in claim 1 or 2.
4. A shaving head as claimed in claim 3, characterized in that the shaver is provided with means for generating alternative shifts of the cutting member, said shifts at least comprising a component in a direction parallel to the direction of travel of the head of the cutting member. cut.