CN110505949B

CN110505949B - Hair cutter and hair cutting blade

Info

Publication number: CN110505949B
Application number: CN201880022837.2A
Authority: CN
Inventors: F·布鲁尔曼
Original assignee: Calligraphy Cut Co GmbH
Current assignee: Calligraphy Cut Co GmbH
Priority date: 2017-03-30
Filing date: 2018-03-29
Publication date: 2022-03-29
Anticipated expiration: 2038-03-29
Also published as: JP2020512174A; AU2018246296B2; BR112019020361B1; DE102017106929B4; CN110505949A; MX2019011487A; BR112019020361A2; WO2018178235A1; KR20190128728A; JP7165430B2; AU2018246296A1; EP3600801A1; EP3600801B1; KR102615107B1; DE102017106929A1

Abstract

The invention relates to a hair-cutting blade (1) for cutting hair, comprising a handle (10) and a blade (2) connected to the handle (10). At least one working section (3) is arranged on a longitudinal side (12) of the cutting head (2) and is set back relative to a line (120) of the longitudinal side (12). A hair cutting blade (4) having at least one cutting edge (14) can be accommodated in the cutting head (2) and arranged such that its cutting edge (14) in the working section (3) is at least partially exposed and does not protrude beyond the straight line (120). The cutting head (2) comprises a guide means (5) having at least one contact surface (15) for hair to be shaved. The placement surface (15) is arranged at least partially at an angle of between 16 DEG and 26 DEG relative to the plane of the hair cutting blade (4) that can be accommodated in the cutting head (2), so that when the placement surface (15) is applied against a hair, the hair to be shaved is at a defined angle relative to the cutting edge (14).

Description

Hair cutter and hair cutting blade

Technical Field

The invention relates to a hair cutting blade for cutting hair, comprising at least one handle and at least one cutting head connected to the handle. At least one hair cutting blade having at least one cutting edge is received in the cutter head.

Background

In general, shaving hair with a hair clipper offers many advantages over cutting hair with scissors. However, the precursors of a procedure using a hair clipper are intended to clearly adjust or guide the clipper relative to the hair. What plays an important role in particular here is the angle at which the hair clipper is held relative to the hair during grooming. The practice of working with hair clippers is therefore usually premised on a rich and professional guide and a great deal of practice or experience.

In the hair clipper according to DE102010006030B4, the longitudinal blade axis is therefore arranged at an angle to the longitudinal clipper axis. Thus, the hair cutter can also be operated with an inclined hair-cutting when held with its longitudinal axis directed straight towards the hair.

In practice, however, it may be observed that manipulating a hair clipper requires a great deal of experience or practice in order to achieve optimal hair cutting results.

Disclosure of Invention

The aim of the invention is therefore to improve the handling of hair clippers and to simplify the handling thereof, in particular for users who are less experienced.

This object is achieved by a hair cutting blade having the features of claim 1 and a hair cutting blade having the features of claim 31. Preferred features are the subject of the dependent claims. Further advantages and features can be derived from the general description and the description of the embodiments of the invention.

The hair clipper according to the present invention is used for cutting hair, in particular hair, and comprises at least one handle and at least one cutter head connected to the handle. At least one working section is provided on at least one longitudinal side of the cutting head, which working section is retracted relative to the line of the longitudinal side. The blade head may house at least one hair cutting blade with at least one cutting edge. The hair cutting blade can be arranged in the cutting head in such a way that its cutting edge is at least partially exposed in the working section and does not project beyond the line or retract with respect to the line. The shaving head comprises at least one guide means which has at least one contact surface for the hair to be shaved. The resting surface is arranged at least locally at an angle of more than 12 °, in particular less than 30 °, preferably less than 26 °, particularly preferably between 16 ° and 26 °, relative to the plane of the hair cutting blade that can be accommodated in the cutting head. This achieves that the hairs to be shaved are at a defined angle to the cutting edge when the placement surface is placed against the hairs.

The hair cutting blade preferably comprises at least one hair cutting blade.

A particularly preferred hair clipper is equipped with: which is used for hair cutting, in particular hair, and comprises at least one handle and at least one cutter head connected to the handle. At least one working section is provided on at least one longitudinal side of the cutting head, said working section being retracted relative to the straight line of the longitudinal side. The blade head may house at least one hair cutting blade with at least one cutting edge. The hair cutting blade is arranged in the blade head in such a way that its cutting edge is at least partially exposed in the working section and does not project beyond the line or retract with respect to the line. The shaving head comprises at least one guide means having at least one resting surface for hair to be shaved. The resting surface is arranged at least in some regions at an angle of more than 12 °, in particular less than 30 °, and preferably at most 26 °, relative to the plane of the hair cutting blade that can be accommodated in the cutting head. This achieves that the hairs to be shaved are at a defined angle to the cutting edge when the placement surface is placed against the hairs.

The hair clipper according to the present invention brings about many advantages. One significant advantage is that the cutting head comprises at least one guide means, which has at least one resting surface. The hair-cutting blade is oriented in relation to the hair-cutting blade plane at an excellent angle to the hair by means of the resting surface. In this way, it is simply necessary to apply the cutting surface of the hair clipper only to the hair to obtain the optimum cutting angle. Consequently, a significantly better haircutting result can be obtained with the haircutting blade of the invention, even if the user does not have as much practice or experience.

An angle of more than 12 ° is also very advantageous, since hairs can thus be cut optimally. Shaving hair by such an angle results in a more dynamic and especially voluminous hairstyle. Furthermore, angles of less than 30 ° are also very advantageous. On the one hand, the angular range of the present invention is effective in avoiding too shallow cuts, which would lead to thinning of the hair and thus to a flat hairstyle. On the other hand, over-blunt cutting is thereby reliably avoided. Hair splitting or other undesirable hair cutting effects are likewise reliably prevented. It is also advantageous that the angle determined by the resting surface is not smaller, even in the case of an incorrect use or an inexperienced person using the hair clipper.

In particular, at least in the region of the cutting edge exposed in the working section, the contact surface is arranged at an angle of more than 12 °, in particular less than 30 °, and preferably at most 26 °, in particular relative to the plane of the hair cutting blade accommodated in the cutting head. It is particularly important in the working section that the hairs are guided at the correct angle. At least in the region of the cutting edge exposed in the working section, the resting surface is arranged at an angle defined according to the invention, in particular with respect to the plane of the hair cutting blade accommodated in the cutting head. Alternatively, the resting surface can be arranged in at least one further or other area at an angle defined according to the invention with respect to the plane of the hair cutting blade accommodated in the shaving head.

The contact surface is preferably arranged at least in sections, in particular at least in the region of the exposed cutting edge of the working section, at substantially 21 ° and in particular 21 ° relative to the plane of the hair cutting blade accommodated in the cutting head. This angle has been found to be particularly advantageous for hair styling.

The placement surface can be arranged at least in regions at an angle of more than 12 °, 13 °, 14 °, 15 °, 16 °, 17 °, 18 °, 19 ° or 20 °. In all embodiments, the angle is preferably greater than or equal to 5 °. The placement surface can be arranged at least in regions at an angle of less than 30 °, 29 °, 28 °,27 °, 26 °, 25 °, 24 °, 23 ° or 22 °. These angles have been found to be particularly advantageous in cutting and hair dressing tests. In an advantageous embodiment, a gradual change, for example in the order of 0.5 °, can be provided.

Particularly preferably, the resting surface is arranged at least locally at an angle of between 13 ° and 29 ° with respect to the plane of the hair cutting blade accommodated in the cutting head. The mounting surface can be arranged at least locally at an angle of between 14 ° and 28 °, in particular at an angle of between 15 ° and 27 °, relative to the hair cutting blade plane.

In a further advantageous embodiment, the mounting surface can be arranged at an angle of between 16 ° and 26 °, in particular between 18 ° and 24 °, and preferably between 20 ° and 22 °, at least in certain regions relative to the hair cutting blade plane.

The mounting surface is preferably arranged at least locally at an angle of 21 ° to the hair cutting blade plane, with an angular deviation of +/-1 °, preferably +/-0.5 ° and particularly preferably +/-0.2 °. A +/-2 deg. deviation is also possible and advantageous. The placement surface can then be arranged locally at an angle other than this angle. The other angle is preferably between 12 ° and 30 ° with respect to the plane of the hair cutting blade.

The support surface and the cutting head are preferably of one-piece construction. This means in particular that the support surface is integrated in the cutting head. The standing surface and the cutting head are preferably designed as one piece with each other. The support surface is designed in particular to be constructed integrally with the cutter head and preferably integrally from a single material. The placement surface and the cutting head are provided in particular by at least one and the same component and in particular by at least one and the same casting. Metal castings are particularly preferred.

It is feasible to provide more than two standing surfaces. Here, the two or more mounting surfaces are constructed integrally with the cutting head and are preferably constructed integrally from a single material. The cutting head may comprise or be formed from more than two cutting head pieces. In this case, at least one respective support surface is preferably integrated in each of the tool head parts. The at least one contact surface is then constructed in particular integrally with the cutting head and preferably from a single material. Particularly preferably, each of the tool head parts is designed as a metal casting. The at least one support surface can also be formed separately from the cutting head or a cutting head part.

The support surface is provided, in particular, by a wedge-shaped and/or convex shaping of the cutting head. The cutting insert can be machined very precisely and at the same time inexpensively while reliably complying with the angles required for the mounting surfaces. The cross-section of the cutting head is designed in particular as a wedge and/or a bulge. It is also possible, however, for the support surface to be designed separately from the cutting head or as at least one separate component. The cutting head and/or the support surface can be designed in two and/or more parts.

In a preferred configuration, the cutting head comprises two side faces, in particular a front face and a rear face.

In particular, at least one respective support surface extends on both sides. The at least two contact surfaces are associated in particular with the same working section. This has the advantage that the left and right sides of the head can be cut without the user having to walk around the head or rotate the clipper. The at least two bearing surfaces associated with the same working section have in particular the same angle relative to the plane of the hair cutting blade accommodated in the cutter head.

Preferably, at least two resting surfaces are provided on each side of the cutting head. The lateral support surfaces correspond to different working sections, which are arranged in particular on two opposite longitudinal sides of the cutting head. The differently-sided contact surfaces correspond to different working sections which are arranged in particular on two opposite longitudinal sides of the cutting head. Thus, switching from one working section to another or from one laying surface to another can be achieved by simply rotating or turning the cutter head. In particular, the at least one elevation extends between at least two resting surfaces arranged on one side. In particular, at least two resting surfaces, which are assigned to different working sections, have the same angle relative to the plane of the hair cutting blade accommodated in the cutter head.

In a particularly advantageous embodiment, two bearing surfaces extend on each of the two side surfaces. In this case, two placement surfaces arranged on different sides are assigned to the same working section. The two contact surfaces on one side face correspond to different working sections which are arranged in particular on two opposite longitudinal sides of the cutting head. In a particularly preferred manner, the two resting surfaces of one side are separated from one another by at least one ridge extending transversely over the cutting head. All four bearing surfaces have in particular substantially the same design with respect to the angle with respect to the plane of the hair cutting blade accommodated in the shaving head. Such a hair clipper offers the advantage of being particularly easy to handle, since multiple cutting positions are available without having to provide the hair clipper with too many working sections.

In particular, at least four resting surfaces are provided for at least two working sections. The working section and/or the standing surface can be designed identically or differently. The placement surface can have, for example, different geometries and, in particular, different angles. The working sections may, for example, have different degrees of retraction and/or different lengths along the longitudinal sides of the cutter head. The placement surface and the working section are preferably of similar or identical design.

Particularly preferably, the support surfaces of one side are separated from one another by at least one bulge which extends, in particular, transversely over and, for example, diagonally over the cutting head. This has the advantage that the two resting surfaces or working sections can be arranged on the same side, without the unused area interfering with hairs sliding along the resting surfaces. But alternatively the ridge may extend longitudinally past the cutting head. The elevations may extend at least locally straight and/or at least locally curved. The elevations are, for example, formed as ridges.

The width of the hair cutting blade is preferably at most equal to half the length of the hair cutting blade. The hair cutting blade is in particular less than 20 mm wide. This design brings about a number of advantages and allows particularly light cutters, for example because they can be designed correspondingly narrow. This is decisive in particular for the wedge-shaped design of the shaving head, since a slight increase in the width of the hair cutting blade already considerably increases the total weight of the shaving head. A hair cutting blade width of less than 20 mm has proved to be particularly advantageous due to the preferred angle of the resting face relative to the hair cutting blade.

The hair cutting blade is in particular less than 19 mm wide. The width may likewise be less than 18 mm and in particular less than 17 mm. Alternatively, the hair cutting blade width may be less than 16 mm and in particular less than 15 mm. Alternatively, the hair cutting blade width may be greater than 20 mm, and for example greater than 21 mm or greater than 22 mm or greater than 23 mm. The hair cutting blade may also have a width greater than 25 mm or greater than 28 mm.

The width-to-length ratio of the hair cutting blades is in particular at least 1:2, preferably at least 1:2.2 or at least 1:2.25 or preferably at least 1: 2.29. Alternatively, the width to length ratio may be at least 1:2.3 or 1:2.4 or at least 1:2.5 or greater. This width to length ratio allows an ergonomically particularly light hair clipper.

In an advantageous design, the hair cutting blade comprises at least one correction mechanism for aligning the hair cutting blade in the direction within the cutting head. The corrective mechanism preferably includes at least one notch located within the hair cutting blade. The gap is particularly widely closed. The correction means preferably comprise at least one correction unit in the cutter head which is at least partially inserted into the recess. The correction means prevent, in particular, the hair cutting blade from being displaceable at least in the longitudinal direction and/or at least in a direction transverse to the longitudinal direction. The hair cutting blade surrounds the correction unit, in particular, at least in some areas in a form-fitting manner. The hair cutting blade rests with its cut-out against the correction unit, for example in the longitudinal direction and/or transversely to the longitudinal direction. The insert can thus be aligned in the direction with high precision and without difficulty and an undesired insert gap during the cutting process can be reliably avoided. The correction mechanism also enables quick and smooth blade replacement.

The recess in the hair cutting blade is preferably formed in the shape of at least one elongated hole. The slot extends in particular in the longitudinal direction of the hair cutting blade. The slot is in particular rectangular. The slot is in particular largely closed. Such a design of the cut-out can be produced particularly economically, while also allowing the hair cutting blade to be aligned in the blade with precision and reliability. The recess is arranged particularly centrally in the hair cutting blade. Other notch geometries and/or other notch orientations are possible within the hair blade. The recess can also comprise sections of different widths and/or lengths and/or curved and/or polygonal course. Or more than two recesses and in particular more than two slots can be provided.

The cut-out extends in particular over more than half, in particular more than three quarters, and particularly preferably more than 80% of the length of the hair cutting blade.

Preferably, the length of the recess, in particular of the elongated hole, preferably exceeds two thirds of the length of the hair cutting blade. It is also preferred that the width of the recess, in particular of the elongated hole, is less than one third of the width of the hair cutting blade. The width of the recess, in particular of the elongated hole, preferably exceeds 20% of the width of the hair cutting blade. This results in a reliable orientation without the hair cutting blade being adversely weakened. The gap can also be designed to be shorter and/or wider or narrower.

The correction unit comprises in particular at least two, preferably at least three elevations. In particular, at least two bulges are arranged on both ends of the elongated hole. In particular at least one protuberance is arranged between the two ends. The blade is thus particularly reliably prevented from moving, so that the cutting effect is further increased. The protuberance extends at least partially through the notch.

The correction means comprise in particular at least one positioning slot arranged in the cutter head. The positioning groove follows at least partially the outer contour of the hair cutting blade. In particular, the positioning slot is at least partially rectangular, so that it follows the rectangular outer contour of the hair cutting blade. Due to the outer contour, the positioning groove provides a secure and particularly close-fitting mounting of the hair cutting blade, while at the same time being particularly inexpensive to produce.

In a preferred embodiment, the cutting head has at least two cutting head parts. The tool head comprises in particular at least one first tool head element and at least one second tool head element detachably connected to the first tool head element. The hair cutting blade may in particular be accommodated between the cutter head members.

At least one engagement projection projects, in particular, on each cutter head piece. The engaging projection is at least partially conical. The engagement projections of the first blade member can in particular be moved below the second blade member or vice versa, so that these can be wedged into each other and the hair cutting blade can be clamped between the blade members. The engaging projections can in particular be wedged into each other and preferably self-locking with each other. This blade head design provides a particularly tight and secure grip of the hair cutting blade, thereby reliably avoiding vibrations and movements of the hair cutting blade. A good cutting effect will be obtained thereby.

Other attachment mechanisms or other types of connections are equally possible. For example, the bit elements may be connected by at least one protrusion inserted into at least one undercut. Alternatively, the cutter elements are mutually pivotably arranged by means of at least one hinge or the like.

In particular, at least one handle pocket for fastening the handle to the cutting head is provided on the first and/or second cutting head part. The at least one working section is arranged in particular in at least one, more preferably in both, of the cutter head parts. In particular, at least one recess is provided in both tool head parts. The recesses in the two tool head parts are used in particular together for at least one and the same working section. The two cutter head parts have in particular the same retraction with respect to a straight line on the longitudinal sides. The two cutting-head parts are in particular of the same width, so that the two cutting-head parts are present flush on the longitudinal sides of the cutting head.

In particular, at least one and preferably both cutting head elements are provided with at least one and preferably two respective bearing surfaces. The support surface of the one cutting-head part is integrated in the cutting-head part and is preferably integrally joined thereto, in particular integrally joined from the same material. The resting surface of the cutter head element can also be designed to be separate from the cutter head element.

Preferably, at least one and preferably both of the tool head parts are each equipped with at least one and preferably both working sections. In particular, at least one contact surface is provided on each tool head piece for each predetermined working section.

The correction unit is arranged in particular on the first and/or second tool head part. In particular, at least one recess is arranged in particular in a further blade part region opposite the correction unit, in which recess the correction unit is accommodated in the mounted state of the blade part.

At least one engagement projection and preferably two engagement projections extend in particular at least partially through the recess in the hair cutting blade. A particularly compact cutter head can thus be achieved. This arrangement is particularly present when the cutter head members are adapted to be operatively connected to each other. In this case, preferably at least one engagement projection and particularly preferably two engagement projections provide at least one correction unit for aligning the hair cutting blade in the direction. This is particularly advantageous since the engaging projection can thus also be used simultaneously for aligning the hair cutting blades in the direction. In particular, the width of the engaging projection matches the width of the indentation, so that a tight-fitting arrangement can be achieved.

It is possible that the first blade head element has at least one recess on its lateral side. The at least one projection of the second tool head part is inserted in particular into this recess. It is also possible that the recess is arranged on the second blade part and the projection is arranged on the first blade part. This achieves a particularly tight grip of the hair cutting blade. The projection is held in the recess, in particular by at least one tenon element. The projection may have at least one locking projection and/or undercut, which engages in particular at least one undercut and/or locking projection in the recess. The transverse side of the tool head part is arranged in particular transversely to the longitudinal side with the working section. The recess is arranged in particular in the lateral side adjacent to the handle or the handle pocket.

In all designs it is preferred that the cutting edge of the hair cutting blade is arranged at an angle of between 0.5 ° and 6 ° with respect to the longitudinal axis of the cutting head. This angle is present in particular when the hair cutting blade is suitably accommodated in the cutter head. Preferably, an angle of between 2 ° and 4 ° is specified. An angle of 3 ° +/-0.5 ° is particularly preferably specified. Or the angle may be 0.1 ° to 10 °. Or it is conceivable that the cutting edges are arranged parallel to the cutting head. This oblique positioning of the cutting edge has the advantage that the cutting effect is further improved.

For this purpose, the correction unit is particularly preferably arranged at such an angle relative to the longitudinal axis of the cutter head. This has the advantage that the desired tilt position can already be preset by the correction mechanism. The blade-inclined position can also be obtained by the notch in the hair cutting blade being arranged at an angle with respect to the blade edge of the hair cutting blade. The angle of the inclined position can also be derived from a combination of the angled arrangement of the correction unit and the indentation. Also, the notch in the hair cutting blade may be disposed at such an angle relative to the longitudinal axis of the blade head.

It is possible that a line segment extending perpendicularly to the longitudinal side makes an angle of 12 ° to 23 ° with respect to the hair cutting blade plane between a valley point, at which the working section is retracted furthest and the resting surface is at the lowest point on the hair cutting blade, and a peak point, at which the resting surface is at the highest point on the hair cutting blade. An angle of 16 ° to 18 °, particularly 17 °, is preferably provided. An angle of 21 is also advantageous and preferred. It is also possible to specify an angle of at least 13 ° and at most 29 ° for a line segment. This design has the advantage that, while a good cutting effect is obtained, it allows a correspondingly flexible design of the resting surface between the valley point and the peak point. The peak is located in particular on the elevation.

In particular, the contact surface is at least partially angled between the valley point and the peak point, in particular at an angle of 12 ° to 30 °, in particular 20 ° to 22 °, relative to the hair cutting blade plane. The mounting surface is at least partially angled between the valley point and the peak point by 16 ° to 26 °, in particular 18 ° to 24 °, relative to the hair cutting blade plane. Other angles are equally possible.

Preferably, the placement surface extends between the valley point and the peak point, in particular along the line segment, at least at two different angles. The at least two angles are in particular between 12 ° and 30 °. This angle is preferably designed as described above. This angle can be provided by the curve of the resting surface. The standing surface may also extend straight.

The support surface can extend, for example, at different angles between the valley point and the peak point or in a convex or curved manner. For example, the mounting surface may have an angle of 20 ° to 22 ° from the peak first, and then transition to at least one more gradual angle, for example 12 ° to 19 °.

In an advantageous development, the mounting surface comprises at least one first mounting section and at least one second mounting section which is located behind the first mounting section transversely to the longitudinal axis. The first placement section is in particular closer to the exposed cutting edge than the second placement section. The first application section has a greater angle than the second application section, in particular with respect to the hair cutting blade plane. This division of the placement surface provides a particularly well-defined orientation of the hairs with respect to the cutting edge. The first bearing section can define a particularly advantageous cutting angle. The more gradual design of the second resting portion enables the cutter head to have a significantly narrower structure, whereby it is lighter in weight and more ergonomic. Or the first placement section may also have a smaller angle than the second placement section.

The first placement section has in particular an angle of 15 ° to 29 ° and preferably 19 ° to 23 °. The second placement section has in particular an angle of 12 ° or 13 ° to 15 ° or 18 °. The second resting portion particularly preferably has an angle of 12 ° to 15 °. The first resting portion preferably has an angle of 21 ° +/-1 °, particularly preferably 21 °. The second placement section has in particular an angle of 14 ° to 16 ° or to 18 °. The angle may be 17 ° or 18 °. The second resting portion preferably has an angle of 15 ° +/-1 °, particularly preferably 15 °. These angles for the first and/or second resting section allow in particular a smooth and clean cut, while also providing better ergonomics of the hair clipper.

Preferably, the first resting portion extends over less than half the width of the resting surface. Preferably, the second resting portion extends over more than half the width of the resting face. The first resting portion extends in particular over less than one third of the width of the resting surface, and the second resting portion extends over two thirds of the width of the resting surface. These extensions of the rest section provide a very good cutting effect, allowing a very smooth sliding of the cutter head over the hair. The second holding section can extend in the longitudinal direction at least on one side next to the working section to the side of the cutting head.

The first and/or second placement section may have a dome shape at least in sections, in particular at least in the region of the cutting edge exposed in the working section. The hairs are thereby guided particularly well against and along the shaving head. In particular, the first and/or second placement surface has a concave dome, so that at least one recess is formed in the side surface. It is also possible to form a convex dome, thereby forming at least one protuberance on the side surface. The first and/or second resting portion may also be at least partially curved. The curvature may be arranged transverse to and/or in the longitudinal direction of the cutter head. The first and/or second placement section may also be planar or rectilinear.

It is possible to arrange at least one third placement section next to the working section on at least one side in the longitudinal direction.

The third bearing section extends at least partially, in particular, between a substantially diagonally extending elevation on the cutting head and a longitudinal side portion of the cutting head, in which the longitudinal side has an increased thickness. The bulge is separated in particular from the two other working sections arranged on two opposite longitudinal sides of the cutter head. By means of such a placement section, it is possible to arrange the two working sections well on two opposite longitudinal sides of the shaving head without hindering hairs from abutting the shaving head. The third placement section has in particular an angle of between 12 ° and 30 ° with respect to the hair cutting blade plane. The angle of the third placement section may be less than or equal to the angle of the first and/or second placement sections. It is also possible that the angle of the third placement section is greater than the angle of the first and/or second placement section.

The cutting head preferably has at least one locating surface for a hair cutting blade. In particular, the hair cutting blade bears with more than a quarter of at least one of its side faces against the positioning face. The hair cutting blade may also abut against a plurality of contact points on the locating surface. The locating surface reliably prevents the insert from vibrating or moving during cutting. It is particularly preferred that the hair cutting blade bears against the locating surface more than a quarter of the way on both sides.

The blade head has, in particular, at least one recess which is set back from at least one of the sides of the hair cutting blade in order to expose the side of the hair cutting blade there. This allows a particularly advantageous reduction of the weight of the cutter head. This is particularly advantageous for a cutting insert of a metallic material. Preferably, at least one recess and/or at least one positioning surface is provided in both tool head parts. In particular, the positioning surface and the recess are opposite one another on one of the tool head parts.

The positioning surface is arranged in particular adjacent to the working section. The recess is arranged in particular separately from the working section. This has the advantage that the blade is received particularly securely where it is subjected to stresses during shaving.

Preferably, the longitudinal handle axis extends in a plane with the hair cutting blade. Thus, the hair clipper is excellent in balance and ergonomics. This arrangement relates particularly to the condition of the hair cutting blade with the hair cutting blade built in for proper operation. For example, the hair clipper needs only to be rotated 180 ° to switch from one working section to the opposite working section. The cutting edge of the hair cutting blade is preferably arranged at an angle to the longitudinal axis of the handle. Or the blade may be aligned parallel to the longitudinal axis of the handle.

The working section has in particular a length which is shorter than half the longitudinal side of the cutter head. In particular, the length of the working section is shorter than one third or preferably one quarter of the length of the longitudinal side. The length of the working section may be shorter than a fifth or sixth of the length of the longitudinal side.

The width of the working section, starting from the line of the cutting head insert body, is in particular less than half the width of the cutting head, preferably less than a quarter of the width of the cutting head. The width of the working section may be less than one fifth or one eighth of the width of the cutter head. Or may be a wider or flatter working section.

The working section is arranged in particular at one third of the longitudinal side at one end of the longitudinal side, preferably at one quarter of the longitudinal side. The working section may also be arranged centrally along the longitudinal sides.

Preferably, the handle and the cutter head have at least one point of common balance. The balance point is located in particular in the handle. The balance point is in particular the point at which the hair-cutting blade is preferably in a state of balance when it is supported at the balance point. This provides a very accurate fiduciary operation. The hair clipper can thus be handled very accurately and without feeling tired even over a long period of time. Thereby, the cutter head can be designed to be sufficiently heavy to allow a reliable and smooth cutting. Regardless of the multiple cutter heads, the hair clipper is optimally balanced by a balance point in the handle so that the head is not too heavy.

The balancing point is arranged in particular at a position adjacent to half of the cutter head, preferably at a position adjacent to one third of the cutter head of the handle. The balance point may also be located in the cutter head.

Preferably, at least one weight is disposed within the handle and/or the cutting head. This has a number of advantages. The user can thus optimally balance his hair clipper, for example, set a desired head weight or define a balance point. The cutter head may, for example, be designed to a minimum weight that allows for energetically favorable cuts. A user with a small hand may lose weight by removing one or more weights

The hair clipper comprises, in particular, at least one counterweight. It may comprise more than two counterweights. The weight is or comprises, for example, at least one lead weight. This provides a large weight in the case of small dimensions. Other materials are equally conceivable. The counterweight can be inserted and screwed, for example, into the handle and/or into the cutting head, in particular. The handle and/or the cutting head are at least partially hollow. The handle and/or the cutting head may include an at least partially enclosed cavity capable of receiving the weight. The cavity is preferably closable. The counterweight may in particular be accommodated between the two cutter head pieces.

The handle and the cutter head may have substantially the same and especially similar weights. The handle and the cutter head in particular have the same weight with a deviation of +/-5g and preferably +/-1 g. The deviation from one another is in particular less than 25%, preferably less than 15% and particularly preferably less than 10%. The deviation may also be larger. The use of at least one counterweight allows, in particular, a weight difference to be set that is adapted to the user. By means of the counterweight, a weight difference of, for example, up to 50% or up to 100% or more than 100% can be set.

For example, the handle weight is 40g +/-5g and the bit weight is 40g +/-5 g. In addition to these weights, at least one counterweight may be housed and/or removed.

The hair cutting blade according to the invention is particularly intended for use in a hair cutting knife according to any one of the preceding claims. The hair cutting blade comprises at least one cutting edge, preferably at least two cutting edges, and at least one recess for an aligning mechanism for aligning the hair cutting blade in the direction within the blade head. The width of the hair cutting blade is at most equal to half the length of the hair cutting blade.

By means of such a width-to-length ratio, the hair cutting blade according to the invention can be inserted particularly easily into a cutting head with an inclined resting surface and preferably into a hair cutting blade according to the invention.

The hair cutting blade is constructed in particular as described above with reference to hair cutting blades.

The hair cutting blade preferably has a rectangular outer contour, in particular with rounded corners. This shape allows the blades and the positioning grooves provided therein to be produced particularly dimensionally precisely and inexpensively. This provides for accommodating the blade with little clearance in the cutter head. The corners may also be rectangular or non-rounded.

The recess is particularly preferably designed as a rectangular slot. The rectangular slot has, in particular, rectangular or non-circular corners. This provides a secure and tight fit on the correction unit. The correction unit is also designed in particular with matching corners or edges of a rectangle.

It is preferred that the notch extends over more than 20% of the width of the hair cutting blade. It is also preferred that the notch extends over more than 75% of the length of the hair cutting blade. The notch preferably extends over more than 25% of the width and/or 85% of the length. This provides a particularly stable seating of the hair cutting blade in the shaving head or on the correction unit. In addition, even in the case of such a recess, the correction unit required for this purpose can be produced particularly economically and with high fitting accuracy.

In particular, only one common hair cutting blade is provided for all planned working sections. The hair cutting blade is provided, for example, with two opposite cutting edges, in order to provide one cutting edge each for the opposite working section. The hair cutting blade has in particular at least two cutting edges, in particular on its longitudinal sides.

The specific description of the angle may also relate to intermediate angles. This is the case in particular in the following embodiments, in which the mounting surface comprises two or three mounting surfaces and/or has a raised or curved course. The intermediate angle relates, for example, to a line segment between the valley point and the peak point.

The handle comprises or is configured in particular as an elongated shank.

Drawings

Further advantages and features of the invention can be derived from the embodiments which will be described in detail below with reference to the drawings. The figures show:

FIG. 1 is a perspective view of a hair clipper in accordance with the present invention;

FIG. 2 is a schematic view of one side of the blade member of the hair clipper;

FIG. 3 is a schematic view of the other side of the cutter head member;

FIG. 4 is a schematic cross-sectional view of the bit member of FIG. 3 taken along cutting line A-A;

FIG. 5 is a front schematic view of the cutter member;

FIG. 6 is a schematic cross-sectional view of the bit member of FIG. 3 taken along cutting line B-B;

FIG. 7 is a rear view of the cutter head member;

FIG. 8 is a schematic view of a side of another blade member of the hair clipper;

FIG. 9 is a schematic view of another side of another head piece;

FIG. 10 is a schematic cross-sectional view of the cutting element of FIG. 9, taken along cutting line A-A;

FIG. 11 is a rear schematic view of the cutting element;

FIG. 12 is a schematic cross-sectional view of the cutting element of FIG. 9, taken along cutting line B-B;

FIG. 13 is a simplified cross-section of a tool tip; and

fig. 14 is a simplified side view of a hair cutting blade.

Detailed Description

Fig. 1 shows a hair cutting blade 1 according to the invention, which has a blade head 2 and a hair cutting blade 4 accommodated therein. The handle 10 is attached to the cutter head 2 so that the longitudinal axes of the handle 10 and the cutter head 2 are aligned in the same direction.

The cutting head 2 has two obliquely opposite working sections 3 which are set back relative to a line 120 of the longitudinal sides 12. The hair cutting blade 4 here comprises two opposing cutting edges 14, each of which is accessible only in one working section 3. The retraction of the working section 3 is designed here to be curved.

The cutting head 2 here comprises two cutting head parts 121,122, between which the hair cutting blade 4 is accommodated. The first blade member 121 is connected to the handle 10. The second blade member 122 is fixed to the first blade member 121 and serves as a housing cover thereof. The two blade head parts 121,122 lie flush against one another on the longitudinal sides 12.

Each of the head pieces 121,122 provides a

side surface

22,32 of the cutting head 2. A substantially diagonally extending elevation 52 separating two opposite working sections 3 is provided on each

side

22, 32.

The shaving head 2 comprises guide means 5, by means of which the hairs are guided along the shaving head 2 at a defined angle during the cutting process. The guide means 5 in this case provide two support surfaces 15 for each working section 3. One resting surface 15 is thereby provided for each working section 3 on each

side

22, 32. The placement surface 15 on the side 22 is not visible in this figure.

The two resting surfaces 15 arranged on the

same side

22,32 are separated from one another by a bulge 52.

The guide means 5 is designed in this case as a single piece with the cutting head 2. The resting surface 15 comes here from the corresponding wedge-shaped design of the cutting head 2 or the cutting head parts 121,122 thereof.

The handle 10 and the shaving head 2 have a common balancing point 20 in the handle 10. In this case, a cavity is provided in the handle 10, in which the counterweight 9 can be accommodated. For example, the weight of the lead weight 9, which is selected here, enables the handle 10 to be as heavy as the shaving head 2 as a whole. The hair-cutting blade 1 is then in the rest position or horizontal position when it is supported at the rest point 20.

In fig. 2, the first blade head element 121 is shown looking at the side 22. The longitudinal axis 42 of the cutting head 2 is drawn here in dashed dotted lines. The lateral sides 123 extend transverse to the longitudinal axis 42. The handle pocket 11 is arranged here on one lateral side 123.

The mounting surfaces 15 each comprise three mounting

sections

151, 152, 153. The first placement section 151 is arranged here in the region of the working section 3. In this case, the second placement section 152 follows the longitudinal axis 42. The third placement section 153 is arranged laterally to the two

placement sections

151, 152 in the direction of the longitudinal axis 42. The thickness of the first blade head 121 increases along the longitudinal sides 12 in the region of the third placement section 153.

The first support section 151 is domed inward in this case, so that a depression occurs in the region of the working section 3. The angle of inclination of the first placement section 151 relative to the hair cutting blade 4, not shown, is greater than the angle of inclination of the second placement section 152 relative to the hair cutting blade. The first resting portion 151 extends over less than half the width of the entire resting surface 15.

Fig. 3 shows the first blade end 121 on the side opposite the side face 22. On this side, the aligning device 6 for aligning the hair cutting blade 4 and the connecting device 7 for fastening the second blade part 122 and the positioning surface 62 for the hair cutting blade 4 can be recognized particularly clearly.

In this case, a respective positioning surface 62 is provided adjacent to each working section 3, against which the hair cutting blade 4 comes into contact in the ready-to-use state. In the cutting head 2, recesses 72 for weight reduction are each cut out in the direction of the longitudinal axis 42 next to the positioning surface 62.

The correction device 6 here comprises a correction unit 26 at the first blade 121, which correction unit comprises three elevations 66 on the first blade 121. The correction mechanism 6 also includes a notch 16 in the hair blade 4, described in detail below with reference to fig. 14. The protuberance 66 is inserted into the recess 16, thereby preventing the hair cutting blade from moving in its longitudinal direction and also transversely to its longitudinal direction.

The correction mechanism 6 here also comprises a positioning slot 86 which matches the outer contour of the hair cutting blade 4 and opens out in the first blade head 121. The depth of the positioning groove 86 is here at least approximately equal to the thickness of the hair cutting blade 4.

The correction unit 26 is arranged by its three elevations 66 at an angle or at an inclination to the longitudinal axis 42 of the cutting head 2. The positioning slots 86 are also angularly disposed. The cutting edge 14 of the inserted hair cutting blade 4 is thus oriented at a defined angle to the longitudinal axis 42 or to the longitudinal side 12 of the cutting head 2. The angle of the inclined position is, for example, 3 °.

The connecting means 7 here comprise an engaging projection 17 which can be wedged with an engaging projection 27 of the other second blade part 122, as shown in fig. 9. For this purpose, the engaging

projections

17,27 have a wedge-shaped or conical shape.

In order to grip the hair cutting blade 4, the housing cover 122 is slipped onto the first blade member 121 in the longitudinal direction, so that one engagement projection 17 comes to lie below the other engagement projection 27, or vice versa. The two blade parts 121,122 are now tensioned against one another, so that the hair cutting blade 4 is clamped firmly between them. Thereby, the blade 4 can be effectively prevented from vibrating during the cutting process.

Here, the engaging projection 17 simultaneously serves as a protuberance 66 of the correcting mechanism 6. For this purpose, the width of the engaging projection 17 preferably corresponds to the width of the cutout 16 of the hair cutting blade 4 with an exact fit.

Fig. 4 shows the first blade head element 121 in a view taken along the line a-a in fig. 3. The recess 37 of the connecting means 7 serves here for receiving the projection 47 of the second head part 122 shown in fig. 8. The protrusion 47 is inserted into the recess 37 while the second head piece 122 is fixed, while the

engagement projections

17,27 are wedged with each other.

A tenon element, not shown in detail here, can be arranged in the recess 37, which prevents the projection 47 from leaving the recess 37. For this purpose, the tenon members preferably engage in corresponding undercuts provided in the projections 47.

Fig. 5 shows the cutter member 121 in a front or side view 123.

Fig. 6 shows the first blade head element 121 in a view taken along the line B-B in fig. 3.

Fig. 7 shows a rear view of the first blade head 121, so that the handle pocket 11 can be seen. This view particularly clearly shows that the longitudinal axis of the handle 10 extends in a plane containing the hair cutting blade 4 accommodated in the shaving head 2.

Fig. 8 shows the second blade part 122 or the housing cover for the first blade part 121 in a plan view looking at the side 32. The second tool part 122 is of similar design to the first tool part 121 and also has two obliquely opposite working sections, so that the second tool part 122 is the other half of the first tool part 121. The working section 3 and the placement surface 15 are also constructed similarly to the first blade element 121.

At the side 123, the second blade part 122 has a projection 47 which is inserted into the recess 37 when the two blade parts 121,122 are assembled.

Fig. 9 shows the side of the second blade head piece 122 facing the hair cutting blade 4. In the region of the working section 3, a positioning surface 62 for the hair cutting blade 4 is also provided on the second blade end piece 122. Laterally and on the opposite longitudinal side 12 in the longitudinal direction, a plurality of corresponding recesses 72 are provided, at which the hair cutting blades 4 are exposed. The handle pocket 11 is not provided on the second blade member 122 as a housing cover.

The engagement projection 27 of the connecting means 7 is of similar design to the engagement projection 17 of the other blade part 121 and here also serves as the elevation 66 of the correction means 6. The correction unit 6 of the second blade member 122 comprises two correction notches 76, and the two outer ridges 66 of the first blade member 121 are inserted into the correction notches 76 when the two members 121,122 are connected to each other.

Fig. 10 shows the second blade member 122 in a view taken along line a-a of fig. 9. The engagement projection 27 and the correction indentation 76 corresponding to the engagement projection 17 of the first blade element 121 are particularly clearly visible. Here, too, the projection 47 can be clearly seen, which is configured with an undercut.

Fig. 11 shows the second blade member 122 in a rear or view looking at the side 123 with the protrusion 47.

Fig. 12 shows the second bit member 122 in a view taken along line B-B of fig. 9.

Fig. 13 shows the cutting head 2 of the hair cutting blade 1 according to the invention and the hair cutting blade 4 accommodated in the cutting head 2 in an extremely simplified view. The cross section of the cutting head 2 in the region of maximum retraction of the working section 3 is shown.

The two

side surfaces

22,32 of the cutting head 2 are each designed with a first and a

second resting section

151, 152. Each

side

22,32 is provided here for a respective

cutter head part

121, 122.

The first placement section 151 is designed to be narrower than the second placement section 152.

The first placing section 151 extends at an angle 301 with respect to the plane of the hair cutting blade 4, and the second placing section 152 is arranged at an angle 302 with respect to the plane of the hair cutting blade 4, the angle 301 being greater than the angle 302. The first placement section 151 begins at a valley point 201, at which the placement surface 15 or the first placement section 151 is at the lowest point on the hair cutting insert 4. Likewise, the working section 3 retracts furthest at the valley point 201 shown. Subsequently, the first placement section 151 transitions to the second placement section 152. The second placement section 152 ends here at a peak 202, at which the placement surface 15 or the second placement section 152 is at the highest point on the hair blade 4.

The first placement section 151 has an angle 301 of, for example, 21 °. The second placement section 152 has an angle 302 of, for example, 15 °.

In the design of the hair clipper 1 shown, the

flanks

22,32 are also designed in such a way that the respective valley point 201 has a specific relationship with the respective peak point 201. The distance 200 between the valley point 201 and the peak point 202, which runs perpendicular to the longitudinal side 12 or the straight line 120 of the cutting head 2, is arranged at a defined angle 303. The angle is for example 17 °.

The three

angles

301, 302, 303 result in a resting surface 15 which allows a very advantageous cutting angle for hairs guided along it and also allows a compact configuration of the shaving head 2.

Fig. 14 shows a top view of the hair cutting blade 4 of the present invention. The hair cutting blade 4 is provided with two opposing cutting edges 14. The hair cutting blade 4 is designed here as a rectangle with rounded corners.

In this case, a cutout 16 is provided on a side 44 of the hair cutting insert 4, which is in the form of a rectangular slot 36. The elongated hole 36 has rectangular or non-rounded corners. The length 46 of the elongated hole 36 corresponds to the distance between the two outer elevations 66 of the correcting means 6 of the cutting head 2. The width 56 of the recess 36 corresponds to the width of the correction unit 26 or of the ridge 66 of the cutting head 2.

Here, the ratio of the width 24 to the length 34 of the hair cutting blade 4 is 1: 2.29. The width 24 is for example 19 mm. The length 34 is for example 43.5 mm. The thickness of the hair cutting blade 4 is for example 0.1 mm. The width 24 of the notch 16 is 5 mm and the length 34 is 37.2 mm.

These dimensions of the hair-cutting blade 4 are well suited for the above-described hair-cutting blade 1, since a very advantageous angle for the resting surface 15 is obtained without the need for a large volume for the shaving head 2.

List of reference numerals

1, a hair cutter; 2, a cutter head; 3 a working section; 4 hair cutting blades; 5, a guide mechanism; 6, a correcting mechanism; 7 a connecting mechanism; 9, balancing weight; 10 a handle; 11, a handle containing groove; 12 longitudinal sides; 14 knife edges; 15 placing surface; 16 gaps; 17 an engaging projection; 20 balance points; 22 side surface; 24 width; 26 a correction unit; 27 an engaging projection; 32 sides; 34 length; 36 long holes; 37 a notch; 42 longitudinal axis; side 44; 46 length; 47 a protrusion; 52, bulging; 56 width; 62, positioning surfaces; 66, bulging; 72 a recess; 76 correcting for gaps; 86 positioning grooves; 120 straight lines; 121 a cutter head piece; 122 a cutter head piece; side 123; 151 placing the sections; 152 placing the section; 153 placing sections; 200 line segments; a valley point 201; 202 peak point; an angle of 301 degrees; 302 degrees; 303 angle.

Claims

1. A hair cutting blade (1) for cutting hair, in particular hair, having at least one handle (10) and at least one cutting head (2) connected to the handle (10), wherein at least one longitudinal side (12) of the cutting head (2) is provided with at least one working section (3) which is set back with respect to a line (120) of the longitudinal side (12), and at least one hair cutting blade (4) having at least one cutting edge (14) can be accommodated in the cutting head (2) and is arranged such that its cutting edge (14) is at least partially exposed in the working section (3) and does not project beyond the line (120), characterized in that the cutting head (2) comprises at least one guide means (5) which has at least one resting surface (15) for the hair to be cut, and in that the resting surface (15) is at least partially opposite to the plane of the hair cutting blade (4) which can be accommodated in the cutting head (2) The faces are arranged at an angle of between 16 ° and 26 ° such that when the placement face (15) is placed against a hair, the hair to be shaved is at a defined angle relative to the cutting edge (14), wherein the placement face (15) comprises at least one first placement section (151) and at least one second placement section (152) located behind it in a direction transverse to the longitudinal axis (42) of the cutting head (2), wherein the first placement section (151) is arranged closer to the exposed cutting edge (14) than the second placement section (152), wherein the first placement section (151) has a larger angle than the second placement section (152).

2. The hair cutting knife (1) according to claim 1, comprising at least one hair cutting blade.

3. The hair cutting knife (1) according to any one of the preceding claims, wherein said resting surface (15) is arranged at an angle of substantially 21 ° at least locally with respect to the plane of the hair cutting blade (4) accommodated within the cutting head (2).

4. The hair cutting knife (1) according to claim 1, wherein the placement surface (15) and the cutting head (2) are integrally constructed with each other and the placement surface (15) is provided by a wedge-shaped shaping of the cutting head (2).

5. The hair cutting knife (1) according to claim 1, wherein the resting surface (15) is provided by a bulge profile of the cutting head (2).

6. The hair cutting blade (1) according to claim 1, wherein the cutting head (2) comprises two side faces (22,32), a front face (22) and a rear face (32), wherein at least one mounting face (15) extends on each of the two side faces (22,32), the mounting faces (15) being assigned to one and the same working section (3) in common.

7. The hair cutting knife (1) according to claim 1, wherein the cutting head (2) comprises two side faces (22,32), a front face (22) and a rear face (32), wherein at least two placement faces (15) are provided on each side face (22,32), the placement faces (15) being assigned to different working sections (3) on two opposite longitudinal sides (12) of the cutting head (2).

8. The hair cutting blade (1) according to claim 1, comprising at least one correction mechanism (6) for aligning the hair cutting blade (4) within the cutting head (2), wherein the correction mechanism comprises at least one indentation (16) in the hair cutting blade (4) and at least one correction unit (26) in the cutting head (2) at least partially inserted into the indentation (16), so that the hair cutting blade (4) is prevented from moving at least in a longitudinal direction and/or at least in a direction transverse to the longitudinal direction.

9. The hair cutting blade (1) as claimed in claim 8, wherein the cutout (16) is configured as at least one elongated hole (36) which extends in the longitudinal direction of the hair cutting blade (4) and is of rectangular design.

10. The hair clipper (1) according to one of the two preceding claims, wherein the correction mechanism (6) comprises at least one positioning slot (86) which is arranged within the cutting head (2) and follows at least partially the outer contour of the hair clipper blade (4).

11. The hair cutting knife (1) according to claim 9, wherein the length of the elongated hole (36) is greater than two thirds of the length (34) of the hair cutting blade (4) and/or the width of the elongated hole (36) is less than one third of the width (24) of the hair cutting blade (4).

12. The hair cutting knife (1) according to claim 9, wherein the correction unit (26) comprises at least three bulges (66), wherein at least two bulges (66) are arranged at both ends of the elongated hole (36) and at least one bulge (66) is arranged between said both ends.

13. The hair cutting blade (1) as claimed in claim 1, wherein the cutting head (2) comprises at least two blade pieces (121,122) comprising at least one first blade piece (121) and at least one second blade piece (122) detachably connected to the first blade piece (121), wherein the hair cutting blade (4) can be accommodated between the blade pieces (121,122) and at least one engagement projection (17,27) respectively projects on the blade pieces (121,122), the engagement projection (17) of the first blade piece (121) being movable below the engagement projection (27) of the second blade piece (122) or vice versa, so that the engagement projections (17,27) are wedged into each other and the hair cutting blade (4) is clamped between the blade pieces (121, 122).

14. The hair cutting blade (1) as claimed in claim 13, wherein at least one engagement projection (17,27), preferably two engagement projections (17,27), extends at least partially through an indentation (16) in the hair cutting blade (4).

15. The hair cutting knife (1) according to one of the two preceding claims, wherein the first blade piece (121) has at least one recess (37) on its lateral side (123), into which at least one projection (47) of the second blade piece (122) is inserted.

16. The hair cutting knife (1) according to claim 8, wherein the cutting edge (14) of the hair cutting blade (4) is arranged at an angle of between 0.5 ° and 6 ° with respect to the longitudinal axis (42) of the cutting head (2), for which purpose in particular the correction unit (26) is arranged at the above-mentioned angle with respect to the longitudinal axis (42) of the cutting head (2).

17. The hair cutting blade (1) as claimed in claim 1, wherein a line segment (200) extending perpendicularly to a straight line (120) of the longitudinal side (12) between a valley point (201), at which the working section (3) is most retracted and the placement surface (15) is at the lowest on the hair cutting blade (4), and a peak point (202), at which the placement surface (15) is at the highest on the hair cutting blade (4), is at an angle of 12 ° to 23 °, in particular 16 ° to 18 °, with respect to the plane of the hair cutting blade (4).

18. The hair cutting blade (1) as claimed in claim 17, wherein the placement surface (15) is at least partially between the valley point (201) and the peak point (202) at an angle of 12 ° to 30 °, in particular 20 ° to 22 °, relative to the plane of the hair cutting blade (4).

19. The hair cutting knife (1) according to claim 1, wherein the first placing section (151) has an angle of 19 ° to 23 ° and/or the second placing section (152) has an angle of 12 ° to 15 °.

20. The hair cutting knife (1) according to claim 1 or 19, wherein the first placement section (151) extends over less than half the width of the placement surface (15) and/or the second placement section (152) extends over more than half the width of the placement surface (15).

21. The hair cutting knife (1) according to claim 1, wherein the first placement section (151) and/or the second placement section (152) is at least partially domed.

22. The hair cutting knife (1) as claimed in claim 1, wherein at least one third resting section (153) is provided alongside the working section (3) on at least one side in the longitudinal direction, which third resting section extends at least partially between a substantially diagonally extending elevation (52) on the cutting head (2) and a part of a longitudinal side (12) of the cutting head (2) where this longitudinal side (12) has an increased thickness.

23. The hair cutting blade (1) as claimed in claim 1, wherein the cutting head (2) comprises at least one positioning surface (62) for the hair cutting blade (4), wherein more than a quarter of at least one of the side surfaces (44) of the hair cutting blade (4) abuts against the positioning surface (62) and/or the hair cutting blade (4) abuts against the positioning surface (62) at a plurality of contact points.

24. The hair cutting blade (1) as claimed in claim 23, wherein the cutting head (2) has at least one recess (72) which is set back relative to at least one of the side faces (44) of the hair cutting blade (4) so that the hair cutting blade (4) is exposed there.

25. The hair cutting knife (1) according to claim 24, wherein said positioning surface (62) is arranged adjacent to said working section (3) and said recess (72) is arranged spaced from said working section (3).

26. The hair cutting knife (1) according to claim 1, wherein the longitudinal axis of the handle (10) extends in a plane containing the hair cutting blade.

27. The hair cutting knife (1) according to claim 1, wherein said handle (10) and said cutting head (2) have at least one common balancing point (20) located within said handle (10).

28. The hair cutting knife (1) according to claim 1, wherein at least one counterweight (9) can be housed in the handle (10) and/or the cutting head (2).

29. Hair trimming blade (4), in particular for a hair trimming blade (1) according to one of the preceding claims, having at least two cutting edges (14) and at least one cutout (16) for an aligning means (6) for aligning the orientation of the hair trimming blade (4) relative to the cutting head (2), characterized in that the width (24) of the hair trimming blade (4) corresponds at most to half the length (34) of the hair trimming blade (4), wherein the cutout (16) extends over 20% of the width (24) of the hair trimming blade (4) and over 75% of the length (34) of the hair trimming blade (4).

30. The hair cutting blade (4) as claimed in claim 29, having a rectangular outer contour, in particular with rounded corners.

31. The hair cutting blade (4) as claimed in one of the two preceding claims, wherein the cutout (16) is configured as a rectangular slot (36).