Cutlery – Razors – Combined
Patent
1994-11-16
1997-02-11
Payer, Hwei-Siu
Cutlery
Razors
Combined
30 4392, B26B 1902
Patent
active
056008880
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to an electric razor having a cutter foil and a cutter head which interacts with the cutter foil and is driven by a motor which is possibly electronically pulsed, and having an indicating device to recommend foil replacement.
DESCRIPTION OF THE PRIOR ART
In the case of such razors, which are known in various configurations, for example with a rotating or oscillating cutter head, the operating reliability and the shaving result are to a large extent dependent on the two mutually interacting parts which are intended to result in the facial hairs being cut off. In addition to the blades of the head, which are naturally subject to a certain amount of wear, the cutter foil is primarily of critical importance to the desired result. Cutter foils have a limited life, the risk of injury significantly increasing towards the end of the life of the cutter foils, and it no longer being ensured that the facial hairs are cut off smoothly. The risk of injury in this case increases not least because the originally specified geometrical shape of the openings in the cutter foil is no longer exactly maintained and, even when the apparatus is switched off, sharp-edged projections on the edge of the openings in the cutter foils can provide a cause of injuries.
In the case of an electric razor which is disclosed in DE-B-1,168,796, the cutter foil can adapt itself to the surface to be shaved and to the cutter head blade.
JP-A-3,218,791 has already disclosed such a razor, in which an indicating device is connected to an operating time counter in order to produce a recommendation for foil replacement. An operating time count on the basis of an autonomous oscillator, for example of a commercially available clock module, allows the operating time to be determined as a function of the on and off switch of the razor, and hence only a relatively coarse estimate of the actual wear of the cutter foil.
The wear to which the cutter foil is subjected is in this case dependent on the friction between the cutter foil and the sharpening block which moves in a positively locked manner relative to the cutter foil. Depending on the contact pressure of the cutter foil which is selected by the respective user by operating the apparatus, the foil is now matched on the one hand to the contour of the face surface to be shaved and on the other hand to the contour of the cutter head, as a result of which the wear is also highly dependent on the load and on the way in which the respective user uses the razor.
SUMMARY OF THE INVENTION
The invention now has the object of creating an electric razor of the type mentioned initially, which is intended to ensure better estimation of the actual wear of the cutter foil and can produce a corresponding cutter foil replacement recommendation in order considerably to reduce the risk of injury to the user of the razor. In order to achieve this object, the razor according to the invention and of the type mentioned initially comprises an indicating device being connected to a device for detecting the load on the cutter foil and to an evaluation circuit. Alternatively, when using a pulsed motor, an improvement can be achieved by the indicating device being connected to an operating time counter, which is triggered by the pulsing of the motor, and to an evaluation circuit. Such an indicating device, when it emits a corresponding signal, provides the user with a recommendation for foil replacement and thus ensures that excessively worn cutter blades are also no longer used. The identification to the user of a razor of the correct time at which a cutter foil should be replaced is not directly measurable or possible since a defective cutter foil is primarily identified by injuries which have already occurred. However, as a result of such an indicating device according to the present invention, the time at which injuries could occur is now reliably indicated in advance, and the possibility is created of replacing a cutter foil even before any injury is possible.
An improved e
REFERENCES:
patent: 4112271 (1978-09-01), Marchetti
patent: 4380121 (1983-04-01), Naimer et al.
patent: 4408392 (1983-10-01), Naimer
patent: 4719698 (1988-01-01), Ninomiya et al.
patent: 5240107 (1993-08-01), Casale
patent: 5347715 (1994-09-01), Friedland
Patent Abstracts of Japan; Publication No. JP3218791; vol. 15, No. 497; Matsushita Electric Works Ltd.; Dec. 16, 1991.
Patent Abstracts of Japan; Publication No. JP4105685; vol. 16, No. 346; Matsushita Electric Works Ltd.; Jul. 27, 1992.
Patent Abstracts of Japan; Publication No. JP54110062; vol. 3, No. 134; Tokyo Electric Co. Ltd.; Nov. 9, 1979.
Patent Abstracts of Japan; Publication No. JP2144093; vol. 14, No. 384; Matsushita Electric Works Ltd.; Aug. 20, 1990.
Payer Hwei-Siu
Payer Elecktroprodukte Gesellschaft m.b.H.
LandOfFree
Electric razor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric razor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric razor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-334232