Hairdressing razor, razor and razor head

1. A hairdressing razor for cutting of hair, comprising:

an elongated handle having a longitudinal axis,

a cutting head having the shape of an elongated rectangle which is connected to the handle,

a blade holder for holding a razor blade in a fixed position in the cutting head, said blade holder extending in a plane containing the longitudinal axis of the elongated handle,

wherein the blade holder is constructed so as to position a longitudinal axis of a razor blade held in the blade holder parallel to the plane containing the longitudinal axis of the elongated handle at an angle of between 0.1° and 10° relative to the longitudinal axis of the elongated handle,

wherein a first recess is provided on a first longitudinal side of the cutting head and a second recess is provided on a second longitudinal side of the cutting head, the first recess being located on an upper half of the cutting head and the second recess being located on a lower half of the cutting head, the first and second recesses being parallel to the plane containing the longitudinal axis of the elongated handle and into each of the first and second recesses a free cutting region projects without extending beyond a longitudinal edge of each of the first and second longitudinal sides when the razor blade is held in the blade holder,

wherein the open side of each of the first and second recesses faces in a direction perpendicular to the longitudinal axis of the elongated handle and a length of an open side of each of the recesses along the longitudinal sides of the cutting head is smaller than half the length of the longitudinal sides,

wherein a length of the free cutting region in the recess is between 1 and 10 mm, and a clear distance of the free cutting region relative to the longitudinal edge is greater than 1 mm,

wherein the recesses are located offset relative to one another on the opposite sides of the cutting head and are thereby displaced along the longitudinal axis of the elongated handle,

wherein the cutting head is adapted to enclose and thereby prevent access to the cutting regions of the razor blade except where the free cutting regions of the razor blade projects into the recesses, and

wherein the cutting head has outer sides, the outer sides each have an elevation which runs in a curve diagonally over the entire length of the cutting head, the elevation constituting the highest point of each of the outer surfaces, the outer surfaces descending from the elevation to the respective longitudinal sides of the cutting head.

2. The hairdressing razor as claimed in claim 1 , wherein the length of the free cutting region in the recess is between 3 mm and 8 mm, the maximum distance of the cutting region into the recess is between 1.6 mm and 3 mm, and wherein the clear distance of the cutting region relative to the longitudinal edge is between 1.5 mm and 3 mm.

3. The hairdressing razor as claimed in claim 1 wherein the cutting head comprises a lower cutting head part which is connected to the handle, and an upper cutting head part, wherein the at least one blade holder is located between the upper and lower cutting head parts, and wherein the upper cutting head part is a separate component that is detachably connected to the lower cutting head part.

4. The hairdressing razor as claimed in claim 1 wherein each of the first recess and second recess is sinuous, providing a rounded transition from the longitudinal edge of the longitudinal side to the recess and wherein the length of the recess is greater than the length of the free cutting region by the factor of at least 1.2.

5. The hairdressing razor as claimed in claim 1 wherein the longitudinal axis of the razor blade held in the blade holder is 0.5° and 6° relative to the longitudinal axis of the elongated handle.

6. The hairdressing razor as claimed in claim 1 wherein the longitudinal axis of the razor blade held in the blade holder is 2° and 4° relative to the longitudinal axis of the elongated handle.

7. The hairdressing razor as claimed in claim 1 wherein the cutting head has additional surfaces that are flat and parallel to each other.

8. The hairdressing razor as claimed in claim 1 , wherein the cutting head is made in one piece and there is an insertion slot in the cutting head for pushing of the blade into the blade holder.

9. The hairdressing razor as claimed in claim 1 , wherein the length of each of the first recess and the second recess is greater than the length of the free cutting region by a factor between 1.5 and 3.

10. The hairdressing razor as claimed in claim 1 , wherein the blade holder is adapted to hold only one said blade with free cutting regions of the blade extending into each of the first recess and the second recess.

11. The hairdressing razor as claimed in claim 1 , wherein the elongated handle has an elongated conical shape.