EP1979137B1 - Rasoir electrique - Google Patents

Rasoir electrique Download PDF

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Publication number
EP1979137B1
EP1979137B1 EP20060829593 EP06829593A EP1979137B1 EP 1979137 B1 EP1979137 B1 EP 1979137B1 EP 20060829593 EP20060829593 EP 20060829593 EP 06829593 A EP06829593 A EP 06829593A EP 1979137 B1 EP1979137 B1 EP 1979137B1
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EP
European Patent Office
Prior art keywords
sensor
cutter assembly
shaver
cutter
cutter head
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.)
Active
Application number
EP20060829593
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German (de)
English (en)
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EP1979137A1 (fr
Inventor
Bernhard Kraus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braun GmbH
Original Assignee
Braun GmbH
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Filing date
Publication date
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Publication of EP1979137A1 publication Critical patent/EP1979137A1/fr
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/046—Cutters being movable in the cutting head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/048—Complete cutting head being movable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
    • B26B19/02—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers of the reciprocating-cutter type
    • B26B19/04—Cutting heads therefor; Cutters therefor; Securing equipment thereof
    • B26B19/06—Cutting heads therefor; Cutters therefor; Securing equipment thereof involving co-operating cutting elements both of which have shearing teeth
    • B26B19/063—Movable or adjustable cutting head
    • 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
    • B26B19/3846—Blades; Cutters
    • 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
    • B26B19/3873—Electric features; Charging; Computing devices
    • B26B19/388—Sensors; Control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes

Definitions

  • the invention relates to an electrically operated razor according to the features of patent claim 1.
  • the cutting head is mounted on an upper side of a shaving housing.
  • the cutting head carries a head frame to which two outer cutters are attached.
  • Two inner cutters are forced into forced contact with the outer cutters by means of a biasing spring and are oscillated to shave the hair relative to the outer cutters.
  • the outer cutters may be brought into contact with different areas of a user's face to allow a more effective shave.
  • the head frame is held in a floating manner on the cutting head, so that the outer and inner cutting devices are depressed with him under compression of the springs. Thereby, the biasing forces of the springs are increased when the head frame is depressed.
  • the head frame is pressed down more firmly so that the biasing force, that is, the contact pressure between the outer and inner cutters, is increased.
  • the hard hair with an increased contact pressure can be successfully cut off or sheared off.
  • the deeper the head frame is depressed to increase the contact pressure the more back pressure the skin receives from the outer cutters.
  • the back pressure is essential for shaving, but it should be kept within a tolerated range because too much back pressure can irritate the skin. This results from the fact that the skin penetrates too deeply into the holes of the external cutting devices, ie the upper knives, and the inner cutting devices, namely preferably two blade blocks, can injure the skin.
  • the head frame when shaving hard hair with the floating head frame of the above patent, the head frame must be depressed deeply, resulting in an increase in back pressure. In other words, the shaving of the hard hair is made possible only after the head frame has been depressed deep or in the cutting head, but with the acceptance of the increased back pressure. Shaving soft hair, on the other hand, can be done almost without the head frame being pressed down and therefore with only a slight counterpressure on the skin.
  • the head frame exerts a reduced back pressure on the skin even in the case of shaving the hard hair with increased contact pressure between the outer and inner cutter.
  • a razor which is capable of being uniformly depressed in different positions but with different contact pressures between the outer and inner cutters.
  • the inner cutting devices which are formed here by two juxtaposed blade blocks, set by an electrically driven motor in oscillating movements, so that they are formed because of their cutting or Scherchantes with the outer cutting devices here of upwardly curved shear sheets , Hair can shear off or cut off.
  • the inner cutters are pushed up with a biasing spring so that a contact pressure is generated on the undersides of the shear sheets with which the inner cutters are pressed against the outer cutters.
  • the outer cutters are carried by a holder for the cutting devices, which is movably supported on a head frame mounted on top of the housing.
  • a height regulating mechanism for regulating the height of the head frame relative to the housing between a high position and a low position is included while the bias springs are more or less compressed to vary the contact pressure and to allow in that the holder for the cutting device can be pressed down relative to the head frame in both the upper and the lower position. Therefore, in addition to the fact that the outer cutters can be depressed even in the lower position when shaving hard hair, the shaving of hard hair can be realized in the lower position in which the increased contact pressure is available. However, in this case, the outer cutters are not held compressed relative to the head frame, and therefore, no increased back pressure is exerted on the skin, thereby allowing shaving of hard hair to be successfully performed with increased contact pressure but without irritation of the skin.
  • the increased contact pressure effective for shaving the hard hair can be initially adjusted without depressing the outer cutters, which would otherwise increase the back pressure on the skin.
  • shaving soft hair can be performed with a head frame held in the up position, allowing the outer cutters to follow the contour of the skin, but with less back pressure on the skin.
  • a razor which has a movable cutting head with at least one cutting device for removing hair on a skin surface.
  • the peculiarity of the invention here is that a detection device is provided for detecting a size that is related to the position of the cutting device relative to the skin surface.
  • the invention consists of at least one actively confirmed adjusting device for changing the position of the cutting head and a control device for controlling the adjusting device, depending on the detected size.
  • Object of the present invention is to improve the thoroughness of Haarentfemung during a shaving with the greatest possible skin protection.
  • both the cutting device and the support element are movably mounted against the force of a spring in the cutting head.
  • the means consist of differently selected spring preloads of the springs on the cutting device and the support element, wherein the spring preload on the cutting device is greater than the spring preload on the support element.
  • the hole geometry of the cutting device can be chosen so that it is pressed against the skin surface to overcome the spring preload on the cutting device, while the support takes over virtually no support work up to this value. In this way, the shearing performance is optimized on the cutting device, while on the other hand, after overcoming the spring bias on the cutting device, the support element for receiving the contact pressure, whereby the penetration depth of the skin is braked in the holes of the cutter and kept in this way in limits.
  • the spring constant for the cutting device is smaller than the spring constant for the support element. It follows that the firmer the razor is pressed against the surface of the skin, the more the cutter and the support member must be supported by their springs. Due to the different spring constants but now makes the support a greater resistance than the cutting device and therefore takes over more shares of the contact pressure. This advantageously leads to a limitation of the skin penetration depth in the holes of the upper blade of the cutting device, so that the skin is spared more. Initially, however, the cutting device is pressed more strongly against the skin, but only up to an area that is tolerable to the skin.
  • the cutting device Due to the initial higher support of the pressing force on the cutting device relative to the support element, the cutting device is initially pressed more strongly against the skin, which strongly favors the cutting process. The firmer the skin pushes against the cutting device, the more force component is then transferred to the support element, so that the penetration depth of the cutting device into the skin no longer appreciably increases.
  • the cutting head is additionally pivotable about a pivot axis, so that, regardless of the different reduction of the cutting device and the supporting element or the second cutting device, the pressing forces F1, F2 can be influenced by the Verschwenkgrad of the cutting head.
  • This solution relates in particular to the type of razor, as mentioned for example in the beginning under "Braun Synchro". However, if the cutting head is not pivotably mounted, but is stationary in the razor housing, then only the cutting device or the support element can be displaced in the cutting head.
  • the pivot axis of the cutting devices in the cutting head itself is displaced, whereby the fact can be taken into account that with operators who usually press the razor against the skin surface with a greater force, the cutting head is pivoted so in that a higher contact pressure is taken over by the cutting device with the smaller holes.
  • the pivot axis in the cutting head can be pivoted so that the cutter with the larger holes absorbs more pressing force, which of course then on a higher penetration depth of the skin In the larger holes.
  • the adjusting device is formed on the shaver housing, over which then the cutter housing pivotally mounted on the shaver housing is pivoted.
  • the cutting device driving motor is formed in the cutting head itself.
  • the cutting head is then pivotally mounted only on the shaver and preferably designed as a linear motor motor is connected via flexible electrical lines to the electrical connection in the shaver housing.
  • the coupling device of the servomotor to the cutting head can be formed, for example, from a toothed belt arrangement or a toothed wheel consisting of gear arrangement, which causes the pivoting movement on the cutting head.
  • a force sensor on the cutting device the output measured data serve as a measure of the depth of penetration of the skin surface in the upper blade.
  • the degree of contact pressure or the contact pressure on the cutter provides good information about the penetration of the Skin into the holes, if one has previously measured by means of experiments, the penetration depth in the laboratory at a given hole geometry of a foil in response to precisely defined contact forces.
  • the electronic pressure control solution according to claim 11 is particularly advantageous in that the support element is formed by a cutting device which corresponds in its embodiment of the first cutting device substantially, but with the difference to a smaller hole geometry and with at least a spring is formed which has a smaller spring bias than the first cutting device.
  • the electronic control of the contact forces is superimposed on the mechanical control by means of the spring forces, so that the control can be even more sensitive to increased pressure forces, without an operator must additionally intervene.
  • the decisive advantage is also here that the cutting device with the larger holes at low contact forces takes over the main cutting performance and the skin does not engage too deeply in the larger holes.
  • a lateral displacement of the pivot axis on the cutting head in turn changes the torques acting on the cutting head due to the changing contact forces, so that also the basic setting of a razor can be changed within small limits.
  • Operators with a more robust skin shift the pivot axis in accordance with the 4 and 5 more to the right so that the cutter with the larger holes is more effective. People with softer skin take the other direction.
  • a further sensor is provided on the razor, which measures the razor speed. That is, the faster shaving, the less skin can penetrate into the larger holes of the first cutter and the later the cutter head must be pivoted so that the first cutter is relieved.
  • an optical sensor has proven to be a sensor for the razor speed according to claim 18, which is constructed in the same way as in the optical sensor a computer mouse is the case. Therefore, a closer description is not discussed here.
  • a skin moisture sensor of the skin surface of an operator measuring sensor can be used on the cutting head, which also supplies the electronic control device with data, which ultimately cause the particularly moist skin Pressure force to the cutter with the larger holes can be greater than when the skin is very dry.
  • the two resistors between the shear films of the two cutting devices are measured and fed to the microcontroller, which then pivots the adjusting device and thus the cutting head accordingly.
  • a position of the shear films determining position sensor on the cutting head which also provides information on whether softer skin parts - because they are more in the horizontal area - or harder skin parts - because this are more in the cheek, so in the vertical area - present. In the more horizontal position, the cutting head is rotated so that the cutter with the larger holes absorbs less pressing force, which reduces the penetration depth of the skin into the holes.
  • Each of the individual sensors mentioned above may also be arranged alone or with one or even all of the razors.
  • a friction sensor according to the features of claim 22 may be formed on the razor, which - similarly as the skin moisture sensor - also indirectly on the nature of the skin information, but additionally determines the influence of the contact pressure of the shaving head to the skin surface and the Microcontroller communicates.
  • the friction sensor according to claim 23 is formed by a strain gauge, which is integrated in the shear foil.
  • a mode switch can be formed on the shaver housing, via which the individual sensors are switched on or off.
  • the mode switch can also be set to the "hard”, “medium” or “soft” position, so that there enlarged (hard) or reduced (soft) by the penetration depth of the skin into the larger holes of the first foil.
  • the razor 1 consists of a razor housing 2, in which one of an electric power source 3, here a battery, driven electric motor 4 is formed, which is connectable by an electrical on / off switch 5 with the electric power source 3.
  • an electric power source 3 here a battery, driven electric motor 4
  • an electrical on / off switch 5 with the electric power source 3.
  • a cutting head 7 is fixed, are mounted on the at least two juxtaposed cutting devices 8, 9 in the direction of movement X or Y to the razor housing 2 and away from it.
  • the cutting devices 8, 9 consist in the embodiments of the FIGS. 1, 2 . 4 and 5 essentially of a respective housing portion 10, 11, in each of which an inner cutter 12, 13 is formed.
  • the inner cutting devices 12, 13 each consist of a blade block on which successively arranged individual blades 14, 15 are attached.
  • the blades 14, 15 lie with their shear surfaces on the underside of the blades 14, 15 from the outside limiting upper blade 16, 17 at. In Fig. 1 However, between the blades 14, 15 and the upper blades 16,17 small distances to represent these parts better.
  • the upper blades 16, 17 are curved upwards and run parallel in the vertical plane in the drawing. The same applies to the lower blades 12, 13.
  • a tangent applied to the upper blades 16, 17 forms the cutting plane 54 for the razor 1 in the case of a very firm skin surface 29.
  • the blade blocks 12, 13 are pressed against the undersides of the upper blades 16, 17 via pretensioned springs 18, 19.
  • the upper blades 16, 17 have a great many small holes 20, 21, of which only one hole 20, 21 has been shown as an example in the upper blades 16, 17 in a larger cross-section.
  • Fig. 1 are at the top of the cutting head 7 to the cross sections of the housing sections 10, 11 adapted openings 22 are formed, in which the housing sections 10, 11 are inserted flush and in which they can be slid according to the movement direction X, Y upwards or downwards ,
  • On the housing sections 10, 11 stops 23, 24 are formed, which limit the movement of the cutting devices 8, 9 upwards when they strike from below at the top 25 of the cutting head 7.
  • FIG. 1 represent both the wall of the cutting head 7 as the wall of the razor housing 2.
  • the springs 26, 27 push the cutting devices 8, 9 so far up until they strike with their stops 23, 24, at the top 25.
  • the springs 18, 19 are used in Fig. 1 primarily to the lower blade 12, 13 with a spring bias to the underside of the upper blade 16, 17 to press.
  • the springs 26, 27 are in Fig. 1 responsible for the lowering and the force distribution on both cutting devices, which will be explained later in more detail.
  • the electric motor 4 is connected via a mechanical transmission device 28 with the blade blocks 12, 13 and brings them into a fast oscillating motion, so that the blades 14, 15 at the holes 20, 21 of the upper blade 16, 17 a Create shearing motion and thus during shaving in the holes 20, 21 entering hair shear (not shown) or cut off.
  • Fig. 6 instead of the two acting on the cutting devices 8, 9 springs 18, 26 and 19, 27, only one spring 18, 19 can be used, as is made Fig. 6 is apparent.
  • the springs 26, 27 are then responsible both for the pressing of the blade blocks 12, 13 to the outer diameter 16, 17 and for lowering the cutting devices 8, 9 at externally acting contact pressure F1, F2.
  • Fig. 6 is only the acted upon by the force F1 right cutting device 8 ( Fig. 1 ).
  • Such a razor arrangement with two cutting devices 8, 9 and a central cutter separating them is known, for example, from the razor "Braun Synchro 7650", which has long been sold by the applicant, and is therefore only roughly explained here.
  • a guide rod 64 which penetrates a bore 61 formed in the foot 61 and which engages behind the bore by means of an extension 66 formed at its end. Due to the biasing force of the spring 26, it is supported on the one hand on the underside of the blade block 12 and on the other hand on the top 67 of the foot 61, so that the blade block 12 on the underside of the upper blade 16, here a very thin foil, is flush with a biasing force , The foot 61 and thus the blade block 12 is in turn fixed on the drive axle 62 of the drive motor 4 and clipped free of play.
  • the upper blade 16 is slidably mounted in the direction of movement X in a removable frame 63, which in turn is releasably secured in the cutting head 7.
  • the removable frame 63 has on both sides of the lower blade 12 guide means 69, in which the end portions of the upper blade 16 are guided in the direction of movement X.
  • stops 70 are formed, which limit the direction of movement X in the removable frame 63.
  • Fig. 1 and 2 are the springs 26, 27 biased between the top 6 and the housing sections 10, 11 with a certain spring preload and also have different spring constants.
  • the shaving foil 16 is provided with larger holes 20 than the holes 21 of the shaving foil 17.
  • the spring 26 assigned to the housing section 10 has been selected in this exemplary embodiment such that the cutting device 8 only lowers with a force F1 after the upper blade 16 has been acted on. This force F1 is inventively greater than the force acting on the cutting device 9 force F2. According to the invention, however, then the spring constant of the spring 26 is smaller than the spring constant of the spring 27th
  • the spring 26 is lowered from a force of 3 Newton and then with a spring constant of 0.5 Newton per mm (N / mm).
  • Fig. 1 is still a mechanical switch 30 shown, with which you can block both cutting devices 8,9 in their movement. Furthermore, with this switch 30, the biasing forces of the springs 26, 27 are changed, so that an earlier or later lowering of the cutting devices 8, 9 is possible. This is particularly advantageous if people press too hard against the skin surface 29. When adjusting the mechanical switch 30 then operates the razor 1 according to the invention more or less sensitive.
  • a razor 1 is shown only partially and also very sketchy.
  • the cutting head 7 is rotatable about a pivot axis 31, which in the longitudinal direction of the cutting devices 8, 9 - that is perpendicular to the plane - runs.
  • a pivot axis 31 which in the longitudinal direction of the cutting devices 8, 9 - that is perpendicular to the plane - runs.
  • the electric drive motor 4 is no longer formed in the razor housing 2 but in the cutting head 7 and the cutting head 7 is pivotable about a pivot axis 31 via a drive belt 32 or otherwise a gear means, wherein the drive belt 32 is connected to a drive shaft 33 in the razor housing 2 at a drive motor (not shown) is attached.
  • the outer surfaces of the shear sheets 8, 9 slide along a skin surface 29 on the chin bottom of the head 36 of an operator. Between the two cutting devices 8, 9, a central cutter 34 is still formed on the cutting head 7, which is connected via a transmission device 35 to the electric motor 4.
  • the electric motor 4 is a linear motor, since it can be designed to be particularly compact and can therefore be easily integrated in a relatively small cutting head 7.
  • Fig. 3 is a block diagram of an electronic Antik horrregelung for the razor after Fig. 2 shown in principle.
  • the core is a microcontroller 37 in which electrical impulses are received, processed and forwarded.
  • two Antiksensoren 38, 39 are present, of which the Antiksensor 38, for example, the contact pressure F1 on the cutting device 8 and the Antiksensor 39, the force F2 on the cutting device 9 measures and accordingly electrical signals via the lines 40, 41 to the microcontroller 37 forwards.
  • a skin sensor 42 or a speed sensor (not shown) may also be formed on the upper blade 16, 17, which likewise sends its electrical data to the microcontroller 37 via a line 43.
  • a mode switch 44 may also be formed on the shaver housing 2, which sends its data via a line 45 to the microcontroller 37.
  • Further sensors such as a speed sensor 56, a position sensor 57 or a friction sensor 58 can be connected to the microcontroller 37 via electrical lines 71, 72, 73. They provide the microcontroller 37 with information about which conditions are currently present for the razor. In accordance with these states and depending on the contact forces F1 and / or F2, the adjusting device 47 and thus the cutting head 7 are then brought into the correct position for this data.
  • the microcontroller 37 is further connected via a line 46 with an electrically operated actuating device 47, which with the drive shaft 33 after Fig. 2 is coupled. From the microcontroller 37 via the line 46 outgoing signals go to the adjusting device 47, which then in turn according to the size and length of the signals, the cutting head 7 about the pivot axis 31 more or less pivots.
  • the adjusting device 47 also has a servo position transmitter 48, which determines each position of the adjusting device 47 and conducts this electrical data via the line 49 to the microcontroller 37.
  • the servo position transmitter 48 is connected via a line 50 to the servo drive or the adjusting device 47.
  • FIGS. 4 and 5 are still schematic representations of the upper portion of a razor 1 on an enlarged scale and shown only very sketchy from one side.
  • a pivot axis 52 extending on the shaver housing 2 on both sides of arms 51 (the second is not visible in the drawing) upwards, which are connected to each other via a pivot axis 52.
  • both the pivot axis 52 as the cutting head 7 extend perpendicular to the plane.
  • the cutting head 7 is on the one hand in the counterclockwise direction on the pivot axis 52 pivotally and on the other hand it is simultaneously movable from left to right or vice versa according to the arrow 53 in a trained on the cutting head gate 59 (shown in phantom) laterally. Due to the lateral displacement of the cutting head 7 according to the arrow 53, the distance a and b changes, this being measured in each case from the center of the upper blade 16 or 17 to the pivot axis 52.
  • FIG. 1 The mode of action of the razor 1 according to the invention FIG. 1 is the following.
  • the electric motor 4 After switching on the shaver 1 via the on / off switch 5, the electric motor 4 is supplied with power from the battery 3 or else an electrical energy source.
  • the electric motor 4 sets via the mechanical transmission device 28, the blade blocks 12, 13 in a longitudinal direction of the lower and upper blades 12, 13 and 16,17 running oscillating reciprocating motion, the upper blade 16, 17 substantially fixed in the housing portion 10, 11 are arranged.
  • the blades 14, 15 over the formed on the upper blades 16, 17 holes 20, 21, so that in the holes 20, 21 entering hairs (not shown) detected by these and sheared or cut off.
  • the upper blade 16 of a cutting device 8 has a larger hole geometry than the upper blade 17 of the second cutting device 9.
  • the hole geometry is to be understood that at least a portion or all holes 20 in diameter or cross section are larger than the holes 21 of the other Upper knife 17.
  • the upper blade 16 emerges at a predetermined contact pressure of F1, for example, equal to 3 Newton, and that then with a spring constant C1, due to the different spring preloads of the springs 18, 19 for example, 0.5 Newton per mm.
  • the upper blade 17 with the smaller holes 21 already emerges at a lower pressure, for example at F2 of 0 Newton, but then with a spring constant C2 greater than the spring constant C1 of the spring 18, for example C2 equal to 2 Newton per mm.
  • F1 contact pressure
  • C2 spring constant
  • the upper blade 16 Up to the predetermined value of, for example, 3 Newton, the upper blade 16 remains fully extended while the upper blade 17 with the smaller holes 21 has already submerged.
  • the pressure of the upper blade 16 with the larger holes 20 only slightly increased, since then this outer blade 16 due to its lower spring constant C1 at the same force increase more than the upper blade 17 with the higher spring constant C2, which dips at a contact force greater than zero, but then the Abtauchweg decreases with increasing force. In this way, a thorough shave with the larger holes 20 having upper blade 16 is achieved and at the same time the skin is protected by the limited pressure, because it is not pressed so deep into the outer blade 16 into it.
  • the second cutting device 9 may also be a pressing device, preferably a pressure roller (not shown), which runs parallel to the cutting device 8.
  • a pressure roller which runs parallel to the cutting device 8.
  • the pressure roller has even the advantage that lower frictional forces during shaving through the skin surface 29 arise, however, in this system, only a single cutting device 8 is used, so that the cutting performance per back and heart movement of the razor 1 will be reduced.
  • the two cutting devices 8, 9 can be constructed substantially the same as the cutting devices 8, 9 according to the Fig. 1 and 6 , but with the difference that the springs 26, 27 can also have the same or different preload forces and the same but also different spring constants C1, C2. With the same spring constants C1, C2, this has the consequence that, with the same contact pressure, both cutting devices 8, 9 equally lower with equal forces F1, F2. However, due to the electrical control of the cutting head 7 by the adjusting device 47 different contact forces F1, F2 generated on the cutting devices 8,9, by which the Hauteindringianae is affected.
  • a pressure sensor 38 (FIG. Fig. 3 ) (in Fig.2 not shown), which measures the pressure of the skin surface 29 on the cutting device 8. Since the upper blades 16, 17 as very thin shear foil are formed, it is difficult here directly to measure the penetration depth of the skin surface into the holes 20, 21. For this reason, a force sensor 38 is used whose electrical measurement data represent a measure of skin penetration depth.
  • the value measured at the force sensor 38 will decrease Fig. 3 supplied to the microcontroller 37 via the line 40. If the pressing force F1 is too high, the microcontroller 37 sends a signal to the electrically operated adjusting device 47, which pivots the drive shaft 33, the drive belt 32 and thus the cutting head 7 clockwise about the pivot axis 31, so that the cutting device 9 a higher contact pressure F2 experiences, which means that the contact pressure F1 is reduced. In turn, the pressure sensor 38 measures this reduction and sends a signal to the microcontroller 37, which stops the adjusting device 47.
  • the actuator 47 Decreases the contact pressure F1 below a predetermined level, which was communicated to the microcontroller 37 by the Anyaksensor 38, the actuator 47 is set in motion and the cutting head 7 is pivoted counterclockwise about the pivot axis 31 until the contact pressure F1 back to a certain Dimension has increased. In this way, a relatively constant application of force to the two cutting devices 8, 9 is achieved. Of course, the actuator 47 moves so fast that in a fraction of a second, the forces F1 and F2 adapt to the current state of shaving.
  • the cutting device 8 and the support element 9 can each have a pressure sensor 38, 39, so that the microcontroller 37 compares both values with one another and then controls the adjustment device 47 in accordance with an evaluation table such that the contact forces acting on the devices 8, 9 F1, F2 can be optimally divided between the two systems. If the application of force is too great, of course, the support element 9 takes over the largest share in order to protect the skin on the cutting device 8.
  • the distribution of the pressure forces on the two shear systems can be changed to one Pressure force F1 (less than 3 Newton), this force is supplied to the upper diameter 16 with the larger holes 20 substantially. If the pressure is increased by the user, the additional force in the ratio of the spring constant proportionally from the upper blades 16, 17 is added.
  • the microcontroller 37 receives the data output by the pressure sensors 38, 39, evaluates them and controls the adjusting device 47 and thus the cutting head 7 accordingly.
  • the razor 1 can still be equipped with an electrically operated skin sensor 42.
  • the skin sensor 42 measures the torque acting on the cutting head 7 pivotable about the pivot axis 31.
  • the torque is converted by a servo generator 48 into electrical values, which are supplied to the microcontroller 37.
  • the microcontroller 37 can determine or calculate a value and pass it to the adjusting device 47, which in turn pivots the cutting head 7 more or less in a rotational direction to the pressing forces F1, F2 in to bring specified permissible values.
  • the servo current which is necessary on the adjusting device 47 in order to hold the cutting head 7 in a certain position is therefore a measure of the skin friction.
  • the cutting head is pivoted so that the contact pressure F1 on the upper blade 16, which has the larger holes 20, is reduced.
  • the skin friction can also be determined by means of a strain gauge which detects, for example, the deflection on the suspension of the shaving head or the stretching of a very thin shaving foil 16, 17. These values can also be supplied to the microcontroller 37, which then processes and compares this data accordingly and instructs the actuator 47 to bring the cutting head 7 into the correct position.
  • the razor 1 can also be provided with a mode switch 44, which communicates various requirements to the microcontroller 37 via the line 45 different requirements, such as in a first position "very sensitive skin”, in a second position “sensitive skin” or in a third position "normal skin”. These positions can also be called “gentle, aggressive or fast”. In accordance with these positions, the microcontroller 37 will then control the adjusting device 47 such that the cutting head 7 assumes a position in which the cutting device 8 can absorb more or less pressing force F1.
  • the razor 1 may further be connected to a speed sensor 56, a position sensor 57 and / or a humidity sensor 58 via the lines 71, 72 and 73.
  • the speed sensor 56 may be an optical sensor which may be constructed as the optical sensor in a computer mouse. Since the skin surface can penetrate deeper into the holes 20, 21 at very low speeds, in this case the cutting head 7 is pivoted in its basic setting by a predetermined fixed amount, so that the upper blade 16 with the larger holes 20, the pressure force generally by a fixed amount is reduced.
  • the microcontroller 37 controls the adjusting device 47 and thus the cutting head 7 accordingly.
  • a position sensor 57 may still be arranged in the razor 1, with which can be determined, for example, on the neck - here the razor 1 must be held rather vertically - or on the cheek - here, the razor must be kept more horizontal - shaved becomes. Since the skin on the neck is more elastic or sensitive than on the cheek, in this case, the cutting head 7 is pivoted so that the contact pressure F1 of the upper blade 16 is reduced with the larger holes 20.
  • a moisture sensor 56 measuring the skin surface 29 can still be arranged on the razor 1.
  • the skin moisture can be done for example by measuring the electrical resistance between the two upper blades 16, 17. Since moist skin is more elastic than dry skin and thus penetrates deeper into the holes 20, 21 of the upper blades 16, 17, in this case the cutting head 7 is pivoted so that the pressing force F1 of the upper blade 16 is reduced with the larger holes 20.
  • the operation of the razor 1 according to the 4 and 5 is the following.
  • the pivot axis 52 is located centrally to the cutting head 7, ie, the distances a and b are the same size, the cutting head 7 remains approximately in a horizontal position, as in Fig. 4 to recognize, but only if the contact forces F1, F2 are the same. In order to let the distance b be greater than the distance a, you now move the pivot axis 52 according to Fig. 5 on the cutting head 7 in the gate 59 to the left. By means not shown in the drawing fastener is now attached to the axis 52 in the swivel head 7 so that it receives a fixed reference point relative to the arms.
  • the cutting head 7 is acted upon by the same contact force F1, F2, so this pivots clockwise about the pivot axis 52, so that the upper blade 17 must absorb more pressing force F2, while the outer diameter 16 is relieved by this amount.
  • the cutting devices 8,9 decrease correspondingly in the direction of movement X, Y as a function of the spring forces. In this way, a harder or softer shave can be performed.
  • the cutting device 8 shown here can be arranged twice on a cutting head 7, as also in FIG Fig. 1 is shown and that the mode of action on both cutting devices 8, 9 and the mode of action in Fig. 1 so that it will not be discussed here again to avoid repetition. It will therefore only the functioning of in Fig. 6 presented and opposite Fig. 1 discriminating embodiment of the cutting device 8 received.
  • the upper blade 16 If the upper blade 16 is acted upon by a contact pressure F1, the upper blade 16 shifts downward in the direction X and presses the blade block 12 against the spring bias of the spring 26 down, the extension 66 from the stop 68 of the foot 61 lifts.
  • the upper blade 16 is guided in the guide device 69 of the removable frame 63.
  • the bore 65 has a lot of game play, so this is not the case in practice, since the connection of the drive shaft 62 to the blade block 12 must be rigid so that the oscillating movements without energy loss from the drive shaft 62 to the lower blade 12, 13 are transmitted.

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

Claims (23)

  1. Rasoir à entraînement électrique (1) constitué d'un boîtier de rasoir (2) et d'une tête de coupe (7) montée sur le boîtier de rasoir (2), sur laquelle est conçue au moins un dispositif de coupe (8), qui est composé d'une lame supérieure (16) pourvue de perforations (20) et d'une lame inférieure (12), lesquelles peuvent être déplacées l'une par rapport à l'autre par un entraînement électrique (4), si bien qu'en cas d'insertion de poils dans les perforations (20), ceux-ci sont coupés par le dispositif de coupe (8), un élément d'appui (9) étant conçu sur la tête de coupe (7) à côté du dispositif de coupe (8), contre lequel la surface de la peau (29) d'un utilisateur vient s'appliquer lors du rasage de la même manière que contre le dispositif de coupe (8), des moyens (18 et/ou 26 ; 19 et/ou 27 ; 52, 53) étant prévus, qui permettent une répartition variable des forces d'application (F1, F2) sur le dispositif de coupe (8) et l'élément d'appui (9), caractérisé en ce que l'élément d'appui est conçu comme le second dispositif de coupe dont la lame supérieure (17) présente des perforations (21) de plus petite section que la lame supérieure (16) du premier dispositif de coupe (8).
  2. Rasoir selon la revendication 1, caractérisé en ce qu'aussi bien le dispositif de coupe (8) que l'élément d'appui (9) sont montés mobiles à l'encontre de la force du ressort (18 et/ou 26; 19 et/ou 27) dans la tête de coupe (7).
  3. Rasoir selon la revendication 1, caractérisé en ce que les moyens sont constitués par des ressorts (18 et/ou 26 ; 19 et/ou 27) agissant sur le dispositif de coupe (8) et sur l'élément d'appui (9) avec une précontrainte élastique variable et en ce que le ressort (18 et/ou 26) agissant sur le dispositif de coupe (8) présente une précontrainte élastique supérieure à celle du ressort (19 et/ou 27) agissant sur l'élément d'appui (9).
  4. Rasoir selon la revendication 2 ou 3, caractérisé en ce que la constante de rappel du (des) ressort(s) (18 et/ou 26) du dispositif de coupe (8) est inférieure à la constante de rappel du (des) ressort(s) (19 et/ou 27) de l'élément d'appui (9).
  5. Rasoir selon la revendication 3, caractérisé en ce que le dispositif de coupe (8) se rétracte seulement à partir d'une force d'application (F1) d'environ 3 Newton et que dans ce cas, la constante de rappel s'élève à 0,5 Newton par mm, tandis que l'élément d'appui (9) se rétracte déjà à une force d'application de 0 Newton, mais présente dans ce cas une constante de rappel de 2 Newton par mm (N/mm).
  6. Rasoir selon l'une des revendications 2 à 5, caractérisé en ce que l'autre dispositif de coupe (9) est également composé d'une lame supérieure (17) pourvue de perforations (21) et d'un bloc (13) de lames (15) en contact avec la lame supérieure (17) sous l'effet de la précontrainte élastique, en ce que le bloc de lames (13) s'abaisse aussi à l'encontre de la force (F2) d'un ressort (27) en cas d'enfoncement de la lame supérieure (17), en ce que la lame supérieure (16) du premier dispositif de coupe (8) présente une géométrie de perforations plus petite que la lame supérieure (17) du second dispositif de coupe (9), et en ce que le premier dispositif de coupe (8) présente une précontrainte élastique plus élevée que le second dispositif de coupe (9).
  7. Rasoir selon la revendication 1, caractérisé en ce que la tête de coupe (7) peut pivoter autour d'un axe de pivotement (31, 52) dans le boîtier du rasoir (2), qui se situe au-dessous d'un plan de coupe (54) qui est formé par l'application de la lame supérieure (16) contre la surface de la peau (29) lors du rasage, et en ce que l'axe de pivotement (31, 52) s'étend parallèlement au sens longitudinal de la lame supérieure (16) et de la lame inférieure (12).
  8. Rasoir selon la revendication 7, caractérisé en ce qu'un axe de pivotement (31, 52), qui peut être déplacé latéralement sur la tête de coupe, est prévu.
  9. Rasoir selon la revendication 1, caractérisé en ce que le rapport des deux forces de serrage (F1, F2), qui agissent sur la lame supérieure (16) et sur la lame inférieure (12), est sensiblement réciproque au rapport des deux distances (a, b) de la lame supérieure (16) et de la lame inférieure (12) par rapport à l'axe de pivotement (31, 52).
  10. Rasoir selon la revendication 1, caractérisé en ce que les moyens sont composés d'au moins un capteur (38 et/ou 39) conçu sur la tête de coupe (7) et/ou sur l'élément d'appui (9), en ce que la tête de coupe (7) peut pivoter autour d'un axe de pivotement (31, 52) dans le boîtier de rasoir (2), en ce que l'axe de pivotement (31, 52) s'étend parallèlement au sens longitudinal de la lame supérieure (16) et de la lame inférieure (12), en ce qu'un dispositif de réglage à commande électrique (47) permettant le pivotement de la tête de coupe (7) est prévu, et en ce qu'un microcontrôleur (37) sert à la commande du dispositif de réglage (47) en fonction des grandeurs enregistrées par le capteur (38 et/ou 39).
  11. Rasoir selon la revendication 10, caractérisé en ce qu'un moteur (4) permettant l'entraînement du dispositif de coupe (8) est conçu sur la tête de coupe (7), en ce que le dispositif de réglage (47) est disposé sur le rasoir (1) en dehors de la tête de coupe (7), et en ce qu'un dispositif d'accouplement (32, 33) sert à l'accouplement du dispositif de réglage (33, 55) à la tête de coupe (7).
  12. Rasoir selon la revendication 10, caractérisé en ce que le capteur (38 et/ou 39) est un capteur de force et en ce que la force de serrage (F1) sert de mesure de la profondeur de pénétration de la surface de la peau (29) dans la lame supérieure (16).
  13. Rasoir selon la revendication 12, caractérisé en ce que le capteur de force (38 et/ou 39) est constitué d'une part d'un aimant disposé sur le dispositif de coupe (8) et d'autre part d'un capteur à effet Hall disposé sur la tête de coupe (7), en ce que le capteur à effet Hall permet de transformer la distance de séparation de l'aimant en signaux électriques, et en ce que les signaux électriques servent de mesure de l'importance de la force d'application (F1).
  14. Rasoir selon la revendication 10, caractérisé en ce que l'autre dispositif de coupe (9) est également composé d'une lame supérieure (17) pourvue de perforations (21) et d'un bloc (13) de lames (15) en contact avec la lame supérieure (17) sous l'effet de la précontrainte élastique, en ce que le bloc de lames (13) s'abaisse aussi à l'encontre de la force (F2) d'un ressort (27) en cas d'enfoncement de la lame supérieure (17), en ce que la lame supérieure (16) du premier dispositif de coupe (8) présente une géométrie de perforations plus petite que la lame supérieure (17) du second dispositif de coupe (9), et en ce que le premier dispositif de coupe (8) présente une précontrainte élastique plus élevée que le second dispositif de coupe (9).
  15. Rasoir selon la revendication 10, caractérisé en ce que la tête de coupe comprend plus de deux dispositifs de coupe (8, 9) et en ce que la paire dotée de la même géométrie des perforations se trouve côte à côte.
  16. Rasoir selon la revendication 10, caractérisé en ce que l'axe de pivotement (31, 52) peut être déplacé latéralement sur la tête de coupe.
  17. Rasoir selon la revendication 10, caractérisé en ce que la tête de coupe (7) présente un autre capteur (56) permettant la mesure de la vitesse de rasage, en ce que l'autre capteur (56) est électriquement relié au microcontrôleur (37), et en ce que le microcontrôleur (37) commande, en fonction de la grandeur enregistrée par l'autre capteur (56), le dispositif de réglage (47) et par conséquent la tête de coupe (7) de manière telle que le dispositif de coupe (8) peut être soumis à une force d'application (F1) augmentée ou réduite d'une certaine valeur par rapport à celle qui a été réglée d'après la mesure du capteur (38 et/ou 39).
  18. Rasoir selon la revendication 17, caractérisé en ce que le capteur (56) permettant la mesure de la vitesse de rasage est un capteur optique.
  19. Rasoir selon la revendication 10, caractérisé en ce que le rasoir (1) présente un capteur supplémentaire (42) permettant la mesure de l'humidité de la peau, en ce que le capteur supplémentaire (42) est électriquement relié au microcontrôleur (37), et en ce que le microcontrôleur (37) commande, en fonction de la grandeur enregistrée par le capteur supplémentaire (42), le dispositif de réglage (47) et par conséquent la tête de coupe (7) de manière telle que le dispositif de coupe (8) peut être soumis à une force d'application (F1) augmentée ou réduite d'une certaine valeur par rapport à celle qui a été réglée d'après la mesure du capteur (3 8 et/ou 3 9).
  20. Rasoir selon la revendication 19, caractérisé en ce que le capteur (42) permettant la mesure de l'humidité de la peau est un dispositif de mesure mesurant la résistance électrique entre les deux lames supérieures (16, 17).
  21. Rasoir selon la revendication 10, caractérisé en ce que le rasoir (1) présente un capteur de position (57) déterminant la position de la lame supérieure (16), en ce que le capteur de position (57) est électriquement relié au microcontrôleur (37), et en ce que le microcontrôleur (37) commande, en fonction de la grandeur enregistrée par le capteur de position (57), le dispositif de réglage (47) et par conséquent la tête de coupe (7) de manière telle que le dispositif de coupe (8) peut être soumis à une force d'application (F1) augmentée ou réduite d'une certaine valeur par rapport à celle qui a été réglée d'après la mesure du capteur (3 8 et/ou 3 9).
  22. Rasoir selon la revendication 10, caractérisé en ce que la lame supérieure (16) présente un capteur de frottement (58) mesurant le frottement de la peau, en ce que le capteur de frottement (58) est électriquement relié au microcontrôleur (37), et en ce que le microcontrôleur (37) commande, en fonction de la grandeur enregistrée par le capteur de frottement (58), le dispositif de réglage (47) et par conséquent la tête de coupe (7) de manière telle que le dispositif de coupe (8) peut être soumis à une force d'application (F1) augmentée ou réduite d'une certaine valeur par rapport à celle qui a été réglée d'après la mesure du capteur (3 8 et/ou 3 9).
  23. Rasoir selon la revendication 22, caractérisé en ce que le capteur de frottement (58) est constitué d'une jauge extensométrique, en ce que le capteur de frottement (58) est conçu sur le dispositif de coupe (8), et en ce que l'importance du fléchissement de la jauge extensométrique constitue une mesure de l'importance de la force de frottement agissant sur la tête de coupe (7).
EP20060829593 2006-02-02 2006-12-14 Rasoir electrique Active EP1979137B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610004675 DE102006004675A1 (de) 2006-02-02 2006-02-02 Elektrisch betriebener Rasierer
PCT/EP2006/012034 WO2007087865A1 (fr) 2006-02-02 2006-12-14 Rasoir electrique

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EP1979137A1 EP1979137A1 (fr) 2008-10-15
EP1979137B1 true EP1979137B1 (fr) 2012-03-14

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US (2) US20090000126A1 (fr)
EP (1) EP1979137B1 (fr)
JP (1) JP5377980B2 (fr)
AT (1) ATE549134T1 (fr)
DE (1) DE102006004675A1 (fr)
WO (1) WO2007087865A1 (fr)

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KR200396688Y1 (ko) * 2005-06-21 2005-09-26 오태준 슬림형 전기면도기
KR200412311Y1 (ko) * 2005-12-02 2006-03-27 오태준 슬림형 전기면도기의 헤드틸팅장치

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US20110197726A1 (en) 2011-08-18
JP5377980B2 (ja) 2013-12-25
EP1979137A1 (fr) 2008-10-15
JP2009525090A (ja) 2009-07-09
ATE549134T1 (de) 2012-03-15
DE102006004675A1 (de) 2007-08-09
US20090000126A1 (en) 2009-01-01
WO2007087865A1 (fr) 2007-08-09

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