This invention relates to a hair removal apparatus.
From DE 36 10 736 A1 there is known a hair removal apparatus, in this case an electrically driven shaving apparatus, on which an actuator head, in this case a short-hair cutter, is movably fastened to the housing. The short-hair cutter includes two shaving foils that extend essentially parallel to the axis of rotation of the actuator head and under each of which respectively one oscillating under cutter with individual sheet-metal disks is slidingly arranged. On this electric shaving apparatus, the short-hair cutter forms the only actuator system.
From DE 198 59 017 C1 there is known in addition a hair removal apparatus which is constructed as a hair clipper and on which the actuator head includes two different actuator systems. In this arrangement two cutting blades are assigned to a single clipper comb and can be coupled, respectively according to the pivot position of the actuator head relative to the housing, to a drive element of the drive mechanism. In this way the clipper comb, which has two rows of cutting teeth, can be brought by means of a pivot movement into an optimum cutting position relative to a skin surface.
The construction of two cutting blades on one clipper comb also enables in advantageous manner a different construction of the teeth on the clipper comb and the teeth on the two cutting blades, for example in that the width of one row of cutting teeth is constructed substantially smaller than the width of the other row of cutting teeth. As a result it is possible, for example, to cut long hair with the one row of cutting teeth and short hair with the other row of cutting teeth. To make this possible, the actuator head must be pivoted about a pivot axis that in this case lies outside the clipper comb. According to FIGS. 6 and 7 of DE 198 59 017 C1, the cutting teeth row 41 thus comes to rest on the housing 1 and is inactive in this position while the cutting teeth row 40 according to FIG. 7 now projects freely outward and can make contact with the skin. According to FIG. 6, the cutting teeth row 41 had adopted its active position, meaning its shaving position, and the cutting edge 40 its rest position before the actuator head was pivoted.
With this hair clipper, the apparatus must also be turned in the hand when switching from the one clipper comb to the other clipper comb because the direction of the cutting plane is also shifted from one side of the housing to the other. Consequently, the electric switching device is moved from the outside, where it was easy to actuate with the thumb, to the inside of the hand where it is therefore no longer easy to reach. Because the pivot axis lies outside the clipper comb, the comb is rotatable only to a limited degree in the housing.
In one aspect, a hair removal apparatus features actuator systems that can be brought into their active operating position through adjustment of the actuator head with easy handling of the apparatus. Because the actuator head forms a rotary body that is freely rotatable about an axis of rotation in the housing of the hair removal apparatus, the entire circumference of the actuator head can be used for providing actuator systems, each of which reaches the required hair treatment plane respectively once during one rotation of the actuator head through 360°. At the same time the apparatus can be held in the same position without any change of position by the hands.
Through the circumferential construction of the individual actuator systems on the actuator head, the actuator head in one embodiment takes on a roller or drum-shaped form, whereby the axis of rotation of the actuator head also extends in the longitudinal direction of the individual actuator systems. If two actuator systems are provided on the actuator head, said systems are advantageously arranged in diametrically opposite positions and the actuator head takes on the form of a right parallelepiped whose circumferential end faces are slightly curved outwards in order to produce better contact with a user's skin.
Actuator heads may include, for example, a short-hair cutter in the form of one or two foils and a cutter engaging the foil(s) from underneath, a center cutter, a long-hair cutter or a plucking device for plucking hairs, which are provided circumferentially on the actuator head and driven by at least one or more drive mechanisms. In addition the actuator head can be equipped with a parking position, i.e., when said head is turned into this plane, all other actuator systems are deactivated and enclosed by the housing to the extent that it is hardly possible for these systems to be damaged, for example during a cleaning operation or accidental bumping of the apparatus.
Hence the actuator systems are not accessible in the rest position. Such a concept enables, for example, a shaving head to be equipped with various shaving systems. Examples of possible variations in the construction of an actuator head include a short-hair cutting system with an opposite, extendible long-hair cutting system and a parking position that is provided between the two shaving systems on the actuator head. In this arrangement the short-hair cutting system rests protected in the housing while the long-hair cuffing system projects radially outwards and can make contact with a user's skin in order to cut off the hairs as close as possible to the skin.
Also conceivable however would be a hair removal apparatus with two opposing short-hair cutting systems equipped with different foils such that the one short-hair cutting system could be used for pre-cutting and the other short-hair cutting system for finish-cutting. As another variant it would also be conceivable to make added provision for a long-hair cutting system that is radially extendible from the circumferential side of the actuator head for cutting contours or for forming designer stubble. Instead of constructing different cutting systems on the actuator head it is also possible in addition for an epilator to be integrated in the head.
In some implementations, the plane of rotation of the actuator head extends in the longitudinal direction of the treatment planes of the individual actuator systems, thus resulting in particular ease of handling of the hair removal apparatus. Like a rotating drum, the actuator head can be turned about its axis of rotation until the corresponding actuator system, for example a short-hair cutter, points radially outwards away from the hair removal apparatus, i.e., its treatment plane extends perpendicular or at an angle to the longitudinal axis of the housing, and therefore can be easily moved against the hair surface to be treated without the housing getting in the way.
In some cases, the actuator head has both its ends rotatably mounted on the housing, and a stable mounting of the actuator head on the housing results; in this case, however, the actuator head is accessible only circumferentially from the outside and not from its two ends. With this embodiment, the axis of rotation is supported on the housing at both ends.
In other cases, the actuator head has only its one and narrower end rotatably mounted on the housing, thus enabling better accessibility also from the one side of the actuator head. The overhung mounting of the actuator head simplifies the mounting and enables a simpler housing design to be obtained. However, with the overhung mounting arrangement it is necessary to construct the mounting stable enough for the bending forces acting on the actuator head when placed against a user's hair surface to be absorbed by the mounting without damage. Another advantage is that, because of the freely accessible side of the one actuator surface, the freely accessible side can better reach into individual surface depressions or into other intractable corners of the skin such as certain areas behind the ear or the region underneath the nose.
With the overhung mounting of the actuator head, a bearing journal projects from the end for close-fitting engagement with a bore constructed on the housing where the journal is fixedly located. In this arrangement the journal and the bore combine to form a closely toleranced slide fit in which the actuator head can be turned free of play. It is possible to select, for example, snap rings or other clip fasteners as fixing elements for fixing the actuator head via the journal in the housing.
In some embodiments, the actuator head is turned by hand about its axis of rotation in order to move a desired hair treatment system into the active position of the actuator head. In some cases, provision is made between the actuator head and the housing for detent means which indicate to a user when the desired actuator system has adopted its correct position relative to the housing and a shaving or plucking operation can be started. Thereafter the actuator head can be moved into its rest position, which can also be done automatically by the apparatus itself after the apparatus is switched off. At the same time the actuator head is locked against rotation in order to prevent the actuator head from being turned accidentally during a hair treatment operation.
As another alternative for adjusting the actuator head it is possible to use for the actuator head an electrically driven adjusting unit which with each actuation of the switch for the adjusting unit turns the actuator head until the switch is switched off again. It is also conceivable for the electric adjusting unit to turn, with each actuation of the switch, the actuator head until the next actuator system is moved into its operating position. In this arrangement it is an advantage for the electric adjusting device to include an electrically driven motor which is arranged in addition to the cutting system and turns, via a transmission device, the actuator head into the desired active position.
In some implementations, the transmission device includes a gearwheel arrangement between the drive motor and the actuator head, whereby the bearing journal can then be constructed simultaneously as a gearwheel which is coupled via a gearwheel connected to the drive shaft of the drive motor. However, it is also conceivable to provide a toothed belt that connects the drive shaft of the electric motor to the bearing journal. Also possible are transmission belts or other transmission units for transmitting the torques. It is also conceivable for the drive motor to be coupled directly to the journal of the actuator head in order to dispense entirely with the transmission device.
In some implementations, rotation of the actuator head by the additional electric drive mechanism is variable such that the optimum accessibility of the actuator face to the corresponding skin region can be set for each individual user. For this purpose an electric switch is switched on and off in order to attain in small steps the optimum actuator position for the corresponding skin surface.
In certain embodiments, the actuator head is turned back, by means of the electric adjusting device for the actuator head, into its correct position if during the hair treatment operation it leaves its optimum position due to overloading.
In some embodiments, the actuator system includes a short-hair cutter and a long-hair cutter. Preferably, the short-hair cutter and the long-hair cutter are arranged in diametrically opposite positions on the circumference of the actuator head. In this embodiment there remains sufficient space in the actuator head for accommodating the drive mechanisms of the two cutting systems.
In some implementations, there results between the two systems on the circumferential surface of the actuator head a free space that can serve as a rest for the hair treatment apparatus and thus protects the cutting systems from external impacts or influences. Of course, other combinations of actuator systems on the actuator head are possible such as any combinations of long-hair cutter, medium-hair cutter, short-hair cutter, beard trimmer, epilators, etc. In addition it is possible to construct on the actuator head another guard surface that assumes the rest position of the hair treatment apparatus and protects the cutting systems from external influences when the hair treatment apparatus is not in use. The rest position can also be an advantage in particular when the hair treatment apparatus is inserted in a cleaning center for cleaning the actuator head; by providing one or more slits in the guard surface they could then be used as inlets and outlets for the cleaning fluid.
It is also possible for a hair removal apparatus to have an actuator head on which an epilator in addition to a long-hair cutter and short-hair cutter is provided on the actuator head.
In some cases, a drive mechanism for the actuator head is provided. The drive mechanism can include a linear motor that is accommodated in the interior of the actuator head. Compared to conventional rotary electric motors, linear motors have the advantage of dispensing with transmission devices and of being able to transmit the oscillating movement directly onto the actuator system. Such linear motors can be well integrated in the actuator head because they can be built to particularly small dimensions.
In certain implementations, a water-tight linear motor is disclosed which is particularly easy to manufacture and mounted on both side walls of the actuator head in oscillatory manner. Preferably on a hair cutting system, the linear motor sets the system in oscillation such that the under cutter moves relative to the outer cutter or the blade block moves relative to the shaving foil in order thus to be able to cut off hairs that penetrate between the cutting edges. It will be understood, of course, that the drive mechanism could also be used on epilators.
Two embodiments of the present invention are illustrated in the accompanying drawings and will be described in more detail in the following.
The hair treatment apparatus 1 schematically presented as a shaving apparatus in
Arranged circumferentially on the actuator head 7 are two actuator systems 9, 10, whereof, for example, the first actuator system 9 can be a long-hair cutter and the second actuator system 10 a short-hair cutter. In
In
In
Because the shaving head 7 of
According to
To avoid repetitions, like reference numerals are selected as a rule in
In
In
The shaving head 7 can be moved about its axis of rotation or bearing axis 8 either by hand or electrically, as becomes apparent from
According to
As the shaving apparatus 1 of
According to
In
In
Illustrated in
According to
Extending upwards on the side walls of the stator 55 are respectively one oscillating spring 57, 58, said springs being connected with each other via a coil core 59. Extending downwards from the coil core 59 are two adjacent cylindrical core sections 60, 61, which are encompassed by respectively one annular coil 62, 63. The free ends of the core sections 60, 61 end a short distance from the magnets 56 on the stator 55, thus defining a predetermined gap S. The core sections 60, 61 are arranged such that each is arranged between a north pole and a south pole of the magnet 56. The north pole is indicated with N and the south pole with S in
On the one hand the leaf springs 57, 58 of
The mode of operation of the shaving apparatus 1 of
First a user must decide whether he wants to use the short-hair cutting system 10 or the long-hair cutting system 9. If he wants to use the short-hair cutting system 10, then he sets the actuating button 18 to the position “Kurz” (short) 19. The drive motor 14 now switches on and rotates the drive belt 16 and hence the actuator head, in this case opposite to the direction of rotation, about the axis of rotation 8 until the short-hair cutting system 10 has reached the active plane 22. To reach this position the drive motor 14 could be a stepper motor that is turned by an electronic control device.
It is also conceivable, however, for a sensor device to be provided between the bearing arm 4 and the actuator head 7, such as becomes apparent from
If, after the short-hair shave, a user would now like to cut for example his sideburns, then he must first push the actuating button 18 into the long-hair cutting position 20. For this purpose the switch 18 is moved into the “Lang” (long) position 20. The drive motor 14 now turns, via the transmission device 16, the actuator head 7 until the long-hair cutter 9 has reached the active plane 22. The sideburns can now be cut by moving the switch 13 into the On-position. The drive motor 11 now turns, via the transmission device 15, 77, 16, 78, 73, the shaving system provided in the actuator head 7. This applies similarly for switching on the short-hair cutting system, as was previously mentioned.
If the user now wants to put down the shaving apparatus 1, the actuating button 18 is switched to the Off-position 21 and the drive motor 14 turns, via the transmission device 16, the actuator head 7 about the longitudinal axis 8 until both shaving systems 9, 10 are concealed in the receptacle 6 and therefore cannot be damaged. This is possible, when both shaving systems lie close together in order to be protected in the receptacle 6.
The mode of operation of the shaving apparatus of
Here too the user first decides which cutting system 19, 20 he wants to use. If the short-hair cutting system 10 (System 1) is to be used first, then there is no need to actuate the short-hair cutter button 19 because the shaving apparatus 1 of
As the arrows 52 and 53 in
The drive of the linear motor 44 operates in oscillating fashion at very high short-stroke frequencies, with the entire linear motor 44 being embedded completely watertight in the stator frame 49. The actual oscillating shaving parts are arranged outside the stator frame 49 and as such can easily be cleaned with water without water being able to penetrate into the internal space 67 of the linear motor 44. It will be understood, of course, that it is possible, instead of coupling the shaving parts 65, 66 to the stator frame 49, to couple different types of drive elements directly and without sealing to various locations. Such drive elements can be, for example, long-hair cutters, short-hair cutters, center cutters and other actuator systems that can be driven via oscillating movements.
If the user now wants to cut sideburns or head hair profiles, then according to
Number | Date | Country | Kind |
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10 2005 044 175.0 | Sep 2005 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP06/07993 | 8/12/2006 | WO | 00 | 5/9/2008 |