MXPA00004023A - A method of directional radio communication - Google Patents

Abstract

A method of directional radio communication between a first station and a second station, the method comprising the steps of defining at the first station a plurality of beam directions available for transmitting successive signals from the first station, selecting at said first station at least one of said directions for transmission of a signal from said first station to said second station, wherein the selection of the at least one direction for transmission is such that successive signals or groups of signals are transmitted in substantiallydifferent directions and such that on average each beam direction available to said first station is used substantially equally.

Description

WET RAZOR IN RETRACTABLE ACTION The invention relates to a shaver comprising a skin supporting element, a first blade, and a second blade, which, seen in a cutting direction of the blades, follow the first blade, the blades are provided with sharp edges substantially parallel extending perpendicularly in the cutting direction and substantially in a cutting plane of the hair touching the skin supporting element. The invention also relates to a shaving head, which can be used suitably in a shaver according to the invention. A shaver of the type mentioned in the opening paragraph is known from EP-A-0 559 130. The known shaver is a wet shaver, in which both blades are adjusted in substantially fixed positions in a shaving head, which is removably secured to a shaver clip. To shave the hairs, the known shaver has to be placed on the skin, the skin touching the skin supporting element and the two blades, and the shaver has to move on the skin in the cutting direction. As a result, the hairs near the cutting plane of the hair of the shaver, that is, directly above the surface of the skin, are cut by the blades, resulting in a fairly uniform shaving. A disadvantage of the known shaver is that the result of shaving obtained lasts only a relatively short period of time. This disadvantage can be attributed to the fact that the hairs cut by means of the known shaver grow relatively fast under the surface of the skin again. It is an object of the invention to provide a shaver of the type mentioned in the opening paragraph, in which the aforementioned disadvantage is excluded as much as possible, so that the result of shaving obtained lasts for a longer period of time . To achieve this, the shaver according to the invention is characterized in that the first blade is provided with a blocking element, which is provided on a side face of the first blade, at a distance from the cutting edge of the first blade, which is substantially less than the average diameter of the hairs to be shaved, by means of the shaver, while the first blade can be periodically moved by means of a drive unit, substantially in the cutting direction from a first position, in wherein the cutting edge of the first blade is located near the cutting edge of the second blade, to a second position. By applying the blocking element on the first blade, the shaver according to the invention obtains a so-called retractable action, as will be explained hereinafter. If the shaver according to the invention moves on the skin in the cutting direction, the hair to be cut is first reached by the cutting edge of the first blade. Since the first blade is provided with the blocking element, the cutting edge of the first blade penetrates the hair only a distance corresponding to the distance between the cutting edge of the first blade and the blocking element, distance which, consequently, it is substantially smaller than the diameter of the hair. An additional penetration of the cutting edge of the first blade into the hair is excluded by the blocking element, because the blocking element can not penetrate the hair. As the first blade is subsequently moved by the drive unit in the cutting direction from the first position to the second position, the hair is pulled along the first blade in the cutting direction, and therefore, It is partially extracted from the skin. Subsequently, the hair thus partially extracted from the skin, is cut by the second blade, directly above the surface of the skin, subsequently, the hair is finally retracted in the skin, by the skin tissue present around the body of the hair .

As a result, the cut hair sinks below the surface of the skin, so that not only a very smooth shaving is obtained, but also, the result of shaving thus obtained, is maintained for a longer period of time , because the cut hair does not grow directly below the surface of the skin. It should be noted that the distance mentioned above, on which the cutting edge of the first blade penetrates the hairs, should be such that the hairs can be pulled along the first blade, but are not cut by the first blade. It has been found that to achieve this, the distance between the cutting edge of the first blade and the blocking element must be substantially less than the average diameter of the hairs to be shaved by means of the shaver. A particular embodiment of a shaver according to the invention is characterized in that the distance between the cutting edge of the first blade and the blocking element varies between 10 μm and 50 μm. As a result, the shaver according to the invention can be used in a particularly suitable manner to obtain a result of the smoother shaving, which lasts longer, when shaving the hairs of the beard, which are generally of an average diameter. approximately 100 μm.

An additional embodiment of a shaver according to the invention is characterized in that the distance between the cutting edge of the first blade and the blocking element is substantially 30 μm. It has been found that, by virtue of the same, the shaver according to the invention, has a substantially optimal retractable action during the shaving of the hairs of the beard. Still another embodiment of a shaver according to the invention is characterized in that the blocking element is provided on a side face of the first blade, oriented away from the second blade. By virtue of the same, it is achieved that the distance over which the cutting edge of the first blade penetrates the hairs, substantially does not deviate from the distance between the cutting edge of the first blade and the blocking element, so that a reliable operation of the shaver is achieved. A particular embodiment of a shaver according to the invention is characterized in that the first blade comprises a carrier, on which a part of the blade including the cutting edge of the first blade is secured, the blocking element is a front side of the carrier extending transversely to the side face of the first blade. By virtue of the same, a simple and practical construction of the shaver according to the invention and the blocking element applied to it is achieved. An additional embodiment of a shaver according to the invention is characterized in that the shaver is provided close to the hair cutting plane, with a guide extending substantially parallel to the cutting direction, guide along which the The first blade is guided during the movements from the first position to the second position. Using this guide, the first blade is guided exactly in the cutting direction during shifts from the first position to the second position. By virtue of this, skin lesions are avoided as much as possible. Still another embodiment of a shaver according to the invention is characterized in that the guide comprises at least one strip, which extends substantially parallel to the cutting direction, which strip is formed by incisions in the second blade and is bent from the second blade. In this way, a particularly simple and practical construction of the shaver according to the invention is obtained. A particular embodiment of a shaver according to the invention is characterized in that the drive unit is provided with a coupling member, which can be made to oscillate, through a limited angle, around a first pivot axis, while the first blade is guided by moving in a guide channel of the shaver, channel which extends obliquely with respect to the plane of hair cutting, the first blade is rotatable, through limited angles, in the guide channel around a second pivot axis, which extends parallel to the first pivot axis, the first blade is provided with at least one articulated element, which can be articulated in a channel of articulation of the coupling member extending parallel to the first pivot axis, and articulation element which can move in the channel of the joint, in a direction transverse to the plane of cutting the hair. In this embodiment of the shaver according to the invention, the cutting edge of the first blade is displaced periodically with respect to the second blade, by means of the drive unit, so that it follows an approximately triangular or quadrangular trajectory. Said trajectory comprises a first part of the trajectory, directed parallel to the cutting direction and extending from the first position to the second position, and a second part of the trajectory, which is directed obliquely with respect to the cutting direction and which it extends from the second position to a third position, where the first blade is located behind the second blade, seen with respect to the cutting plane of the hair. An additional embodiment of a shaver according to the invention is characterized in that the second pivot axis is determined by ears, which are formed by incisions in the first blade and are bent from the first blade, the first blade is also guided by moving in the guide channel by means of the ears. In this way, a very simple and practical construction of the shaver is obtained. Still another embodiment of a shaver according to the invention, is characterized in that the skin supporting element and the two blades are part of a razor head of the shaver, shaving head which is detachably secured to a shaver fastener , the drive unit is located in the holder and is removably coupled to the first blade. If, after repeated use of the shaver, the blades have become blunt, the blades can be easily replaced by replacing the shaver head with a new shaver head. A particular embodiment of a shaver according to the invention is characterized in that the shaving head is provided with a coupling guide extending parallel to the two pivot shafts, coupling guide which serves to cooperate with an additional coupling guide. of the fastener, the shaving head is detachable from the fastener by sliding both coupling guides away, in a direction parallel to both pivot shafts, the first blade being simultaneously removable from the drive unit, by sliding the articulated element of the first blade out of the channel of the articulation of the coupling member, in a direction parallel to the two pivot axes. In this way, a particularly simple and practical coupling is achieved between the shaving head and the fastener, and between the first blade and the drive unit. These and other aspects of the invention will be apparent from, and elucidated with reference to, the modalities described hereinafter. In the drawings: Figures to Id show in detail, a hair cutting process, using a shaver according to the invention, Figure 2 shows a shaver according to the invention, and Figure 3 shows a shaver carrier. shaver drive unit, according to Figure 2. Figures to Id show, in detail, a first blade 1 and a second blade 3 of a shaver according to the invention. The second blade 3 follows the first blade 1, seen in a cutting direction X of the blades 1 and 3. The first blade 1 has a cutting edge 5 extending perpendicularly to the cutting direction X, while the second blade 3 has a cutting edge 7 extending perpendicularly to the cutting direction X and parallel to the cutting edge 5 of the first blade 1. In the Figures to Id, the cutting edges 5 and 7 extend in a direction perpendicular to the plane of the Figures. The second blade 3 is secured in a fixed position to the shaving head 9 of the shaver, which will be described in detail hereinafter. The first blade 1 is displaceable relative to the second blade 3, in a manner that will be described in greater detail hereinafter, by means of a shaver drive unit 11, which will also be described in greater detail hereinafter. The first blade 1 comprises a carrier in the form of plate 13, which is operable by the drive unit 11, and a part of the blade 14, which is secured to the carrier 13 and which includes the cutting edge 5. As the Figures to Id 'show later, the first blade 1 is provided with a locking element 15, which is provided on a side face 17 of the first blade 1, oriented away from the second blade 3. In the example shown in FIG. shaver according to the invention, the blocking element 15 is a front side 19 of the carrier 13, which extends transversely to the side face 17 of the first blade 1. According to the invention, the blocking element 15 is provided at a distance d from the cutting edge 5 of the first blade 1, the distance d is shown in Figures Ib and Id and is substantially less than the average diameter of the hairs to be shaved by means of a shaver in accordance with with the invention In the example shown of the shaver according to the invention, the distance d is approximately 30 μm. In operation, the first blade 1 is displaced periodically, by means of the drive unit 11, with respect to the second blade 3, so as to follow a substantially triangular or quadrangular trajectory 21, which is shown in the Figures to Id, by means of dashed lines. The periodic movement of the first blade 1 has a relatively high frequency, for example of 100 Hz or 1000 Hz. If the shaver moves on a surface of the skin 23 in the cutting direction X, then the cutting process of the blade is obtained. hair as shown in the Figures the to Id. As the second blade 3 follows the first blade 1, seen in the cutting direction X, first, the cutting edge 5 of the first blade 1 will come into contact with a hair 25 a to be cut when the shaver travels on surface of the skin 23 in the cutting direction X. The figure shows a first position of the first blade 1, in which the cutting edge 5 of the first blade 1 is located near the edge cutting edge 7 of the second blade 3. From the first position, the first blade 1 moves substantially in the cutting direction X, by means of the drive unit 11, to a second position shown in Figure Ib. . Due to the presence of the blocking element 15 on the lateral face 17 of the first blade 1, the cutting edge 5 of the first blade 1 only penetrates into the hair 25 a distance, which is determined by the distance d between the cutting edge 5 of the first blade 1 and the blocking element 15. An additional penetration of the cutting edge 5 of the first blade 1 in the hair 25 is excluded by the blocking element 15, because the blocking element 15 can not penetrate the hair 25. Since the distance d is substantially less than the average diameter of the hairs to be shaved by means of the shaver, the hair 25 is not cut by the first blade 1, but instead, the hair 25 is pulled along the first blade 1 in the cutting direction X, during the movement of the first blade 1 from the first position to the second position, so that the hair 25 It is partially extracted from the skin, as shown in Figure Ib. In the second position of the first blade 1, shown in Figure Ib, the cutting edge 7 of the second blade 3 has reached the hair 25. The hair 25, which is partially extracted from the skin, is penetrated by the cutting edge. 7 of the second blade 3, just above the surface of the skin 23, and the cutting edge cuts the hair 25 completely. Meanwhile, the first blade 1 is moved by the drive unit 11 from the second position, in an oblique direction with respect to the surface of the skin 23, to a third position shown in Figures 1 and 1, in which the first blade 1 is located behind second blade 3, seen relative to the surface of skin 23. Subsequently, first blade 1 is moved by drive unit 11 from the third position to the first position, shown in the Figure the. After the hair 25, which is partially extracted from the skin, has been cut by the second blade 3, a part of the remaining hair 25 'of the hair 25 is retracted into the skin by the skin tissue present around the skin. the part of the hair 25 '. As shown in Figure Id, this causes the remaining hair part 25 'to sink back below the surface of the skin 23. As a result of this so-called retractable action of the shaver according to the invention, not only a very smooth shaving result is obtained, without the shaving result also lasting a longer period of time, because the remaining hair part 25 'does not grow below the surface of the skin 23, until after a considerable period of time. The cutting edge 5 of the first blade 1 must penetrate the hairs a distance such that the hairs can be pulled along, by the first blade 1 over a small distance in the cutting direction X, without being cut or broken by the first blade 1. It has been found that, in order to achieve this, the distance d mentioned above, between the cutting edge 5 and the blocking element 15, must be substantially less than the average diameter of the hairs to be shaved by means of the shaver according to the invention. It has been found that with regard to shaving the hairs of the beard, which generally have an average diameter of approximately 100 μmJ, good results are achieved if the distance d varies between 10 μm and 50 μm. In the case of shaving the hairs of the beard, it has been found that a substantially optimal shrinking action is obtained, if, in a manner analogous to the example described above of the shaver according to the invention, the distance d is about 30 μm. If the shaver according to the invention is used to shave some other type of hair, such as the hair of the legs, the shaver can be provided, for an optimal shrinking action, with a distance d between the cutting edge 5 of the first blade. 1 and the blocking element 15, which is adapted to the other type of hair. By virtue of the fact that the blocking element 15 is provided on the lateral face 17 of the first blade 1 oriented away from the second blade 3, it is achieved that the distance over which the cutting edge 5 of the first blade 1 penetrates the hairs, is substantially equal to the distance d between the cutting edge 5 of the first blade 1 and the blocking element 15. As a result of the same, it is additionally achieved that, in the first position of the first blade 1 shown in FIG. Figure 1, the cutting edges 5 and 7 of both blades 1 and 3 are separated as closely as possible, so that a hair, which is partially extracted from the skin, it is directly cut by the second blade 3. As a result, a reliable and reproducible operation of the shaver according to the invention is obtained. It is noted, however, that the invention also includes shavers, in which the blocking element is provided on the side face of the first blade 1, facing the second blade 3, or shavers in which both side faces of the first Blade 1 are provided with a blocking element. In the example described above of the shaver according to the invention, the blocking element 15 is formed by the front side 19 of the carrier 13, in which the part of the blade 14 of the first blade 1 is secured. By virtue of the same, a practical and simple construction of the shaver according to the invention is obtained. It is noted that the invention also includes shavers where the first blade is provided with a different type of blocking element, such as a strip or wire extending parallel to the cutting edge of the first blade, or with a number of strip segments or of wire, which are arranged side by side, seen parallel to the cutting edge of the first blade, 0 one or more seals, which are formed to be integral with the first blade. As shown in Figure 2, the first blade 1 and the second blade 3 are provided, in the example shown of the shaver according to the invention, in the shaving head 9 mentioned above, which is releasably secured to the fastener 29, which can hold the user in his hand . The shaving head 9 further comprises an element supporting the skin 31 which, during operation of the shaver, bears against the skin to be treated. As shown in Figure 2, the cutting edges 5 and 7 of the blades 1 and 3 extend substantially in a cutting plane of the hair 33, which extends substantially parallel to the cutting direction X of the blades 1 and 3 , and touches the skin supporting member 31. By virtue of the same, it is achieved that, during the movement of the shaving head 9 on the skin, the blades 1 and 3 move along, separated from the surface of the skin. skin, so that the skin lesions caused by blades 1 and 3, are avoided as much as possible. Figure 2 further shows that the above-mentioned drive unit 11 comprises a pivot arm 35, which is mounted with respect to the fastener 29, so that it is rotatable through a limited angle about a first axis of pivot 37, which extends parallel to the cutting edges 5 and 7. The drive unit 11 further includes an electric motor 39, which has an external shaft 40, which is arranged in the holder 29, to drive a eccentric 41. The pivot arm 35 includes a groove 43 for cooperating with the eccentric 41, which groove extends parallel to the first pivot arm 37. The use of the eccentric 41 and the groove 43 allows the pivot arm 35 to be pivoted. oscillate around the first pivot shaft 37 by means of the electric motor 39. As FIG. 2 further shows, the carrier 13 of the first blade 1 is arranged in a guide channel 45, which is formed in the shaving head 9 and which HE extends obliquely with respect to the hair cutting plane 33. The carrier 13 is shown in a side view in Figure 2 and in a front view in Figure 3. As shown in Figures 2 and 3, the carrier 13 includes a first group of ears 47 and a second group of ears 49. As shown in Figure 3, the ears 47 and 49 are formed by incisions in the plate-shaped carrier 13, the ears 47 of the first group border the openings 51 in the carrier 13, and the ears 49 of the second group border the openings 53 and 55 in the carrier 13. The first group of ears 47 and the second group of ears 49, are folded from the plate-shaped carrier 13 in mutually opposite directions, and extend substantially perpendicular to the carrier 13. It is noted that Figure 3 shows the ears'47 and 49 in a position where the ears 47, 49 have not been bent from the carrier 13 during the manufacture of the carrier 13. In the Figure 3, the lines of flexion of the ears 47 of the first group are indicated by the reference numeral 57, while the lines of flexion of the ears 49 of the second group are represented by the reference numeral 59. As shown in Figure 2, the carrier 13 of the first blade 1 is guided in displacement in the guide channel 45 by means of the ears 47 and 49. The ears 49 of the second group also determine a second pivot axis 61, around which the carrier 13 can be rotated through limited angles in the channel guide 45. The second pivot axis 61 extends approximately through the angular points 63 of the ears 49 of the second group and is directed substantially parallel to the first pivot axis 37. As Figure 2 further shows, the drive unit 11 comprises a coupling member 65, which is secured in a fixed position to the pivot arm 35. In the coupling member 65, a channel of the joint 67 is provided, which extends parallel to the first pivot axis 37 and which serves to cooperate with two spherical or cylindrical articulated elements 69, which are secured to the carrier 13 of the first blade 1. Note that Figure 2 only shows one of the two articulated elements 69. Since the coupling member 65 is secured in a fixed position to the pivot arm 35, the coupling member 65 and the pivot arm 35 can oscillate together, by means of the electric motor 39, around the first pivot axis 37, through the limited angle a.

The articulated elements 69 can be articulated in the hinge channel 67 about an axis of the hinge 71 which extends parallel to the first pivot axis 37. The hinge elements 69 can also slide in the hinge channel 67 over a limited distance in a direction Y transverse to the hair cutting plane 33 between a first detent "73, which is formed by a side wall of the hinge channel 67, and a second retainer 75, which is formed by a raised lateral edge of the articulation channel 67. As shown in the Figures the to Id and in the Figure 2, the shaving head 9 of the shaver is additionally provided close to the cutting plane of the hair 33, with a guide 77 for the first blade 1, which guide extends substantially parallel to the cutting direction X.

The guide 77 includes a number of strips 79, which extend substantially parallel to the cutting direction X, and which are formed by incisions in the second blade 3 and are bent from the second blade 3. As shown in detail in the Figures to Id, the strips 79 extend through the openings 81 and 83, which are provided, respectively, in the carrier 13 and the part of the blade 14 of the first blade 1. The openings 81 in the carrier 13 are also visible in Figure 3.

By virtue of the construction of the aforementioned shaver, the aforementioned substantially triangular or quadrangular trajectory 21, according to which the first blade 1 is displaced with respect to the second blade 3 by the drive unit 11, is obtained from the following way In operation, the coupling member 65 rotates alternately in a positive direction of rotation R, shown in FIG.

Figure 2, the first blade 1 is displaced in the cutting direction X, and in a negative direction of rotation R. During the rotation of the coupling element 65 in the positive direction of rotation R, the articulated elements 69 of the first blade 1 bear against the first retainer 73 of the hinge channel 67, and the coupling member 65 exerts a driving force F on the articulated elements 69 shown in Figure 2, driving force which has a positive mechanical torque around the second pivot axis 61. Under the influence of the positive torque, the carrier 13 bears with the ears 49 against a side wall 85 of the guide channel 45, and the part of the blade 14 abuts against the guide 77, as shown in detail in Figures la and lb. As a result, the cutting edge 5 of ^ The first blade 1 is displaced exactly along the guide 77 in a direction substantially parallel to the cutting direction X, from the first position shown in Figure la to the second position shown in FIG. n Figure Ib. Since the cutting edge 5 of the first blade 1 is guided along the guide 77 in the manner described above, the skin lesions caused by the first blade 1 are avoided as much as possible. During a subsequent rotation of the coupling member 65 in the direction of negative rotation direction R, the coupling member 65 exerts a driving force F2 on the articulated elements 69 shown in the Figure 2, driving force F2 which has a negative mechanical torque around the second pivot axis 61. Under the influence of the negative torque, the articulated elements 69 of the first blade 1 bear against the second detent 75 of the channel of the link 67, so that the carrier 13 is rotated in the guide channel 45, through a limited angle, around the second pivot axis 61. As a result, the carrier 13 is supported by the angular points 63 of the ears 49 and with the supports 87 of the ears 49 against the side wall 85 of the guide channel 45, so that the cutting edge 5 of the first blade 1 is displaced, in a direction oblique to the cutting direction X, from the second position shown in Figure Ib to the third position shown in Figure le. If the direction of rotation of the coupling member 65 is subsequently reversed again, the carrier 13 is rotated about the second pivot shaft 61 again, and the first blade 1 returns to the first position shown in Figure la. The shaving head 9 of the shaver according to the invention, shown in Figure 2, is detachably secured to the fastener 29, and the driving unit 11 is releasably coupled to the first blade 1, so that the shaving head 9 with blades 1 and 3, it can be replaced if, after a number of shaves, blades 1 and 3 become dull. For this purpose, the shaving head 9 is provided with a coupling guide 89, which extends parallel to the first pivot axis 37 and which serves to cooperate with an additional coupling guide 91 of the fastener 29, which also extends parallel to the first pivot axis 37, and the two cooperating coupling guides 89 and 91 can be separated by moving them apart in a direction parallel to the first pivot axis 37. During the separation of the coupling guides 89 and 91, the carrier 13 of the first blade 1 is unclocked simultaneously from the drive unit 11, in which both articulated elements 69 of the first blade 1 are also slid from the hinge channel 67 of the coupling member 65, articulation channel which is also directed parallel to the first pivot shaft 37. In this way, a particularly simple and practical coupling is achieved between the shaving head 9 and the fastener 29, and e the first blade 1 and the drive unit 11. In the uncoupled state of the shaving head 9, the first blade 1 is held in position with respect to the shaving head 9 by means of a number of ring-shaped support elements. 93, which are located in the guide channel 45 and extend through the openings 55 in the carrier 13. In Figure 2, one of the support elements 93 is shown in a side view. It is noted that there is a space between the openings 55 and the support elements 93, so that the first blade 1 can be displaced relative to the shaving head 9 and the support elements 93 in the manner described above. In the aforementioned example of the shaver according to the invention, the first blade 1 is displaced periodically with respect to the second blade 3 ', according to an approximately triangular or quadrangular trajectory 21. It is noted that the first blade 1 can alternatively , to be displaced periodically, in relation to the second blade 3, according to a different trajectory. According to the invention, such a different trajectory should at least comprise a part of the trajectory, which extends parallel to the cutting direction, from the first position shown in Figure la to the second position shown in Figure Ib. It is further noted that, instead of the drive unit 11 described above, the shaver according to the invention may alternatively comprise a different type of drive unit for driving the first blade, so that the drive unit comprises one or more piezoactuators. It is finally noted that the shaver according to the invention can alternatively comprise a shaving head, which can not be separated from the fastener or a shaving head, which is detachably secured to the fastener in a different manner.

Claims (10)

1. CHAPTER CLAIMEDICATORÍO Having described the invention, it is considered as a novelty and, therefore, the content is claimed in the following CLAIMS: 1. A shaver, comprising a skin supporting element, a first blade, and a second blade, which, seen in a cutting direction of the blades, follows the first blade, the blades are provided with edges substantially parallel cutting edges extending perpendicularly to the cutting direction and substantially in a cutting plane of the hair touching the skin supporting element, characterized in that the first blade is provided with a blocking element, which is provided on one side side of the first blade, at a distance from the cutting edge of the first blade, which is substantially less than an average diameter of the hairs to be cut by means of the shaver, while the first blade can be moved periodically by means of a drive unit substantially in the cutting direction from a first position, in which the cutting edge of the first blade is located ured near the cutting edge of the second blade, to a second position.
2. 2. The shaver according to claim 1, characterized in that the distance between the cutting edge of the first blade and the blocking element varies between 10 μm and 50 μm. The razor according to claim 2, characterized in that the distance between the cutting edge of the first blade and the blocking element is substantially 30 μm. The shaver according to claim 1, 2 or 3, characterized in that the blocking element is provided on a side face of the first blade, oriented away from the second blade 5. The shaver according to claim 1 , 2, 3 or 4, characterized in that the first blade comprises a carrier, on which a part of the blade, including the cutting edge of the first blade, is secured, the blocking element is a front side of the extending carrier transversely to the side face of the first blade 6. The shaver according to claim 1, 2, 3, 4 or 5, characterized in that the shaver is provided close to the plane of hair cutting, with a guide extending substantially parallel to the cutting direction, guide along which the first blade is guided during the displacements, from the first position to the second position 7. The shaver in accordance with the law. Vindication 6, characterized in that the guide comprises at least one strip extending substantially parallel to the cutting direction, which strip is formed by incisions in the second blade and which is bent from the second blade. The shaver according to claim 6 or 7, characterized in that the drive unit is provided with a coupling member, which can oscillate through a limited angle, around a first pivot axis, while the first The blade is guided by moving in a guide channel of the shaver, channel which extends obliquely with respect to the plane of hair cutting, the first blade is rotatable, through limited angles, in the guide channel around a second pivot shaft which extends parallel to the first pivot axis, the first blade is provided with at least one articulated element, which can be articulated in a channel of the joint of the coupling member extending parallel to the first pivot axis, and articulated element which can be placed in the channel of the joint in a direction transverse to the hair cutting plane. The razor according to claim 8, characterized in that the second pivot axis is determined by ears, which are formed by incisions in the first blade and are bent from the first blade, the first blade is also guided by moving in the guide channel by means of the ears. The shaver according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, characterized in that the skin supporting element and the two blades are part of the shaver head of the shaver, head a shaver which is detachably secured to the shaver clip, the drive unit is located on the clip and is removably coupled to the first blade. The shaver according to claim 10, if dependent on claim 8 or 9, characterized in that the shaving head is provided with a coupling guide extending parallel to the two pivot shafts, coupling guide which, serves to cooperate with an additional coupling guide of the fastener, the shaving head is detachable from the fastener by sliding both mating guides apart, in a direction parallel to both pivot shafts, the first blade is simultaneously detachable from the drive unit, sliding the articulated element of the first blade outside the joint channel of the coupling member in a direction parallel to the two pivot shafts. 12. A shaving head, which can be used suitably in a shaver according to claim 10.