TECHNICAL FIELD

This invention (Hair removal device) relates to a shaving device with a razor blade, as defined according to International patent classification (IPC) under

- B26B 21/00 - Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor- blade; Equipment therefor;

- B26B 21/14 - · · Safety razors with one or more blades arranged transversely to the handle;

- B26B 19/12 - · of the oscillating-cutter type; Cutting heads therefor;

Cutters therefor.

TECHNICAL PROBLEM (solution for which the patent application is requested)

How, with the help of a blade, to cut a hair in such a way that the blade, when moving in the direction of the cut, also vibrates perpendicularly to that direction, thereby simultaneously performing a sawing motion. The idea is shown in figure No. 1.

BACKGROUND ART (description and analysis of known solutions of the defined technical problem)

There are many razors with one or more blades on the market today. In all of these razors, the blade is firmly connected to the razor handle, so that the blade always follows the direction of the movement of the hand, or i.e. the razor handle. The razor handle movement is such that the blade slides over the skin and encounters hairs which it then cuts. The cutting edge of the blade is therefore moving in the direction of the cut. There are razors which have an electrical motor in it, with an excenter on its axle. The result of rotating the axle with the excenter is vibration of the handle, and consequently of the blade. If we imagine a point on the blade, then this point will perform a circular motion. The rotation axis of this circle is parallel to the skin and the axis of the electric motor, so that the circular motion of the blade results in cyclic contact of the blade to the face, in accordance to the revolving rate of the motor axle. One turn causes one contact, as shown in figure No. 2.

INVENTION SUMMARY (to present the technical problem and its solution, and to describe the technical innovation in comparison to the previous state of technology) In the theory of cutting it is well known that less cutting force is needed if the blade performs a two-way movement, one in the direction of the cut and the other in a direction perpendicular to the first one. This perpendicular direction is also parallel to the cutting edge of the blade. This is easy to imagine if we think of even the finest blade, such as a razor blade, as a tiny saw with microscopic teeth. If we looked at a razor blade through a microscope, we would see microscopic teeth, just not all the same and regularly spaced like we would find on a saw. When we understand this, that every blade is essentially a saw, it becomes clear that when we perform a motion perpendicular to the cut, and parallel to the blade, we are actually sawing. Therefore, if we introduce an additional blade movement in the direction parallel to the blade, than we will not be cutting the hair, but sawing it, which is far easier than cutting.

BRIEF DESCRIPTION OF THE ILLUSTRATIONS

The accompanying illustrations, which are included in the description, depict a way to implement the invention, and help explain its basic principles.

Figure 1. Illustration of cutting a hair by a blade;

Figure 2. Illustration of the existing solution with a rotating vibrating handle; Figure 3. Illustration of vibrating the blade with an electromagnet; Figure 4. Illustration of vibrating the blade with an electric motor.

Detailed description of at least one way of implementing the invention

In figure 3 we see a schematic overview of the Blade (1) which is in firmly attached to the Vibrating Lever (5). The Vibrating Lever (5) rotates around the Axle (6) which is a part of it. On the other end of the Vibrating Lever (5) is the Armature (7) of the Electromagnet (8). When alternating current flows through the Electromagnet (8), then it attracts and repels the Armature (7) in accordance with the frequency of the AC current which flows through it. A Spring (9) holds the Armature (7) in a neutral position. Vibration of the Armature (7) on one end of the Vibrating lever (5) causes the same vibration on the Blade (1) end. As the Axle (6) is perpendicular to the Cutting Edge (la) of the blade, the blade will, due to the vibration of the Vibrating Lever (5), also vibrate in the direction (A) perpendicular to the direction (B) of the cut, as shown in figure 1.

The same vibrating effect on the Cutting Edge (la) of the blade, for the purpose of achieving a sawing motion, can also be done as shown in figure 4. In this case the Vibrating Lever (5) performs the same motion as in figure 3., except that is in this case driven by and Electric Motor (10), via a Crankshaft (11) over a Piston Rod (12).

INVENTION USAGE METHODS

The invention is suitable for use in manual shaving. It is characterized by ease of shaving because the hairs are cut by sawing, rather than cutting, as they are in present practice. The invention is applicable to shaving devices with one or more blades. List of terms used

1. Blade with Cutting Edge la

2. Hair

3. Electric Motor with Excenter

4. Excenter on the Crankshaft of the Electric Motor

5. Vibrating Lever

6. Vibrating Lever Axis

7. Vibrating Lever Armature

8. Electromagnet

9. Armature Spring

10. Electric Motor with Crankshaft

11. Crankshaft

12. Piston Rod