EP4081377A1 - Hairdressing razor for styling head hair - Google Patents

Abstract

Hairdressing razor (1) having a razor head (2) and a handle (10). In the razor head (2), a hairdressing blade (4) having a cutting edge (14) is able to be received. The razor head (2) comprises two razor-head parts (201, 202) that are able to be coupled releasably to one another by means of a locking device (200). In this case, the locking device (200) comprises a locking mechanism (203) that is able to be actuated via a control element (204). The control element (204) is provided by at least a part of the handle (10). As a result of the control element (204) being actuated, the locking mechanism (203) is transferable from a use position into a release position in order for it to be possible to release the coupled-together razor-head parts (201, 202) from one another. The locking mechanism (203) comprises a securing element (213) which, for taking up the use position, is able to be fixed to the second razor-head part (202) by means of the control element (204) and which extends in the use position from the first razor-head part (201) into the second razor-head part (202). In this case, the first razor-head part (201) has a through-opening (211) through which the securing element (213) extends such that one end of the securing element (213) is connected to the handle (10) and the other end of the securing element (213) is able to be connected to the second razor-head part (202).

Description

HAIR KNIFE FOR HAIRDRESSING THE HEAD

description

The present invention relates to a hairdressing knife for styling scalp hair with at least one handle and with at least one cutter head connected to the handle. At least one styling blade with at least one cutting edge is received in the cutter head.

Cutting head hair with such a hairdressing knife usually offers many advantages over cutting hair with scissors. While the handling of the hairdressing is particularly safe due to the recessed work section, changing the blade is sometimes a source of danger. In particular, the uncoupling of the cutter head parts for removing or inserting the styling blade from the cutter head must usually be carried out with care in order to avoid cuts.

In contrast, it is the object of the present invention to improve the handling of such a hairdressing knife and, in particular, to simplify the blade change and make it safer.

This object is achieved by a hairdressing knife with the features of claim 1. Preferred features are the subject matter of the subclaims. Further advantages and features emerge from the general description of the invention and the description of the exemplary embodiments.

The hairdressing knife according to the invention is used for styling hair and preferably scalp hair. The hairdressing knife includes at least one cutter head and at least one handle arranged in particular on the side of the cutter head. The handle in particular comprises an elongated handle or is designed as such. At least one working section is arranged on at least one longitudinal side of the cutter head. The working section is set back from an alignment line on the long side. At least one styling blade with at least one cutting edge can be received in the cutter head. The styling blade can be arranged in the cutter head in such a way that its cutting edge is at least partially exposed in the working section and does not protrude beyond the alignment line. The cutter head comprises at least two cutter head parts which can be detachably coupled to one another by means of at least one locking device. The cutter head comprises at least one first cutter head part and at least one second cutter head part. The locking device comprises at least one locking mechanism. The locking mechanism can in particular be actuated manually via at least one operating element. The operating element is provided by at least a part of the handle, in particular by the handle itself.

The locking mechanism can be transferred from at least one use position to at least one release position by at least one actuation of the operating element in order to be able to release the cutter head parts that are coupled to one another. In particular, the locking mechanism comprises at least one securing element, which can be fixed to the second knife head part by means of the operating element in order to assume the use position and which in the use position extends at least from the first knife head part at least partially into the second knife head part. In particular, the first knife head part has at least one through opening through which the securing element extends in such a way that one end of the securing element is connected to the handle and the other end of the securing element can be connected to the second knife head part. The hairdressing knife according to the invention offers many advantages. The locking device and its actuation via the operating element integrated in the handle offers a considerable advantage. As a result, a blade change can be carried out quickly and comfortably and at the same time particularly safely. At the same time, the particular ergonomics and handling of the hairdressing knife are not adversely affected by such a locking device. It is also particularly advantageous that the invention can be implemented in a structurally uncomplicated and economical manner and is particularly not susceptible to malfunctions.

The locking mechanism can preferably be transferred from the release position to the use position by at least one actuation of the operating element in order to couple the cutter head parts to one another. As a result, the advantages of the invention can also be used for coupling the knife head parts after inserting the blade. In the position of use, the cutter head parts are in particular releasably but not inadvertently or releasably coupled to one another without actuating the operating element. In the position of use, the cutter head parts are in particular coupled releasably without tools. It is also possible for the cutter head parts to be automatically transferable from the release position to the use position without actuating the operating element. For example, the cutter head parts are placed on top of one another and locked together or the like for this purpose.

Particularly preferably, the locking mechanism can be actuated or operated as intended by means of at least one rotary movement of the operating element. In particular, the locking mechanism can be transferred from the use position into the release position and / or from the release position into the use position by means of the rotary movement. The rotary movement takes place in particular by a rotary movement of the handle. In particular, the rotary movement takes place around a longitudinal axis of the handle. In particular, an axis of rotation corresponds to the rotational movement Long axis of the handle. The axis of rotation can also be parallel to the longitudinal axis of the handle. In particular, the axis of rotation is parallel to the longitudinal side and / or to the alignment line of the cutter head and / or the cutting edge of the styling blade. Such a configuration offers a particularly advantageous actuation of the locking mechanism.

In particular, the operating element is provided by at least one elongate section of the handle. In particular, the elongate section extends over at least a quarter or at least half or at least three quarters and preferably over the entire length of the handle. The operating element is particularly preferably provided by the handle itself. In particular, at least the subsection is rotatable. The entire handle is preferably rotatable. It is possible for the partial section of the handle to be rotatable, while the remaining section of the handle remains stationary during the rotary movement. It is also possible for the operating element to be provided by at least one lever and / or at least one switch or the like arranged on the handle. In particular, the section is integrated into the handle.

In particular, the locking mechanism is suitable and designed to secure the second cutter head part in a non-positive and / or form-fitting manner on the first cutter head part. In the context of the present invention, a threaded connection is regarded as a force connection. The component equipped with the threaded connection, for example the securing element described below, in particular also provides a form-fitting connection of the cutter head parts.

It is also possible for the force fit and / or form fit to be provided by another suitable connection.

The locking mechanism is preferably suitable and designed to move the second cutter head part in a linear movement and / or to move into the position of use parallel to the plane of the first cutter head part. In particular, the position of use is achieved in that the second cutter head part is moved linearly. In particular, the linear movement takes place in a plane parallel to the first cutter head part. In particular, the second cutter head part is moved into the release position by an opposing linear movement. In this case, linear guidance takes place in particular by a securing element of the locking mechanism and / or by a form-fit device, as will be described in more detail below. This offers a particularly comfortable and safe loosening or fastening of the cutter head parts. Other types of movement are also possible, e.g. B. a pivoting movement.

In a particularly advantageous embodiment, by properly fastening the handle to the first knife head part, the second knife head part can also be fixed or secured to the first knife head part by means of the locking mechanism. In particular, by fixing the second cutter head part on the first cutter head part, the operational fastening of the handle to the first cutter head part also takes place at the same time. In particular, the fastening of the handle is mechanically coupled to the locking mechanism. In particular, the locking device provides a fastening device for the handle. In particular, because the operating element is actuated, the handle is also attached to the first cutter head part at the same time.

The locking mechanism in particular comprises at least one securing element. In particular, the securing element for taking up the position of use can be fixed to the second knife head part by means of the operating element and can preferably be screwed to the second knife head part. In particular, the securing element extends, at least in the position of use, at least from the first cutter head part into the second Knife head part (or to the second knife head part). This offers a particularly advantageous fastening of the cutter head parts. In the position of use, the securing element is fixed in particular on the first knife head part and on the second knife head part. The securing element is fixed in particular by means of a force-fitting and / or form-fitting connection. In particular, the second cutter head part is fixed in the position of use with a force-fit and / or form-fit connection on the first cutter head part.

The securing element is in particular arranged at least in sections in the handle. The securing element runs in particular along the longitudinal axis through the handle. In particular, the securing element extends through the first cutter head part into the second cutter head part, at least in the position of use. In particular, a longitudinal axis of the securing element is arranged parallel to the longitudinal axis of the handle or runs along the longitudinal axis of the handle.

In particular, the locking mechanism comprises at least two coupling sections, at least one coupling section being arranged on each of the cutter head parts. The securing element is particularly suitable and designed to releasably connect the two coupling sections to one another. In particular, the securing element can be releasably connected to the two coupling sections. In particular, the coupling section and the cutter head part are connected to one another in one piece, preferably in one piece with one another. In particular, the securing element can be operated by means of the operating element.

In particular, the securing element can be screwed or screwed into at least one of the two coupling sections, preferably into the coupling section of the second cutter head part (possibly also into the coupling section of the first cutter head part) can be inserted therein or latched to it or the like. In particular, the securing element can be pushed through the coupling section of the first cutter head part. Another suitable mechanism can also be provided which is suitable and designed to connect the securing element to the coupling sections in a detachable manner without tools. It is possible that the locking mechanism is also suitable and designed to attach the handle to the cutter head in a detachable manner without tools.

It is preferred and advantageous that, in order to assume the release position, the securing element can be released from the second cutter head part by means of the operating element and can preferably be screwed out of the second cutter head part. By releasing the securing element in this way, the locking mechanism goes, in particular, from the position of use to the position of release. In particular, a force-fit and / or form-fit connection of the securing element to at least the second cutter head part is thereby eliminated.

In a particularly advantageous embodiment, the securing element comprises at least one threaded section. In particular, the threaded section can be screwed into at least the second cutter head part by means of the operating element. The threaded section can preferably be pushed through the first cutter head part before screwing into the second cutter head part without a screw connection taking place there. The threaded section can, however, also be screwed into the first cutter head part by means of the operating element. In particular, the threaded section can be screwed out of the first and / or second cutter head part by means of the operating element. For this purpose, the first and / or second cutter head part in particular have a thread area that corresponds to the thread section. The thread area is arranged in particular in the coupling section. In particular, the locking mechanism is designed as a screw mechanism or comprises at least one such. In particular, the locking mechanism provides at least one screw connection. Other types of mechanism are also possible, for example a lever mechanism or a click mechanism or plug mechanism or the like.

The securing element, in particular at least the threaded section, is preferably connected to the operating element in a rotationally test. In particular, the securing element is connected to the handle in a rotationally test. In particular, the securing element is also rotated when the handle is rotated.

In a particularly advantageous and preferred embodiment, the handle can be releasably attached to the first knife head part and / or to the second knife head part by means of the securing element, in particular at least the threaded section. In particular, the handle can be fastened to the coupling section of the knife head part by means of the securing element. The handle can preferably be screwed to the coupling section of at least the second cutter head part by means of the securing element. This has the advantage that both the locking mechanism is operated by means of the operating element and the handle can be attached or detached to the cutter head.

To fasten the handle, the threaded section can be screwed into the first and / or second cutter head part in particular. In particular, the locking device is suitable and designed to actuate the locking mechanism by means of the operating element and also to release and / or fasten the handle from the cutter head by means of the securing element. The attachment of the handle to the first and / or second knife head part can additionally or alternatively also take place via at least one other type of connection. For example, at least one further thread or a plug connection or the like can be provided for this purpose. In particular, in the position of use, the threaded section extends with a first part through the first Knife head part and with a second part adjoining the first part in the longitudinal direction at least partially (in particular completely) into the second knife head part.

In an advantageous development, the first cutter head part has at least one through opening.

In particular, the securing element, preferably the threaded section, extends through the through opening (of the first knife head part) in such a way that one end of the securing element is connected to the handle and the other end of the

Securing element can be connected to the second cutter head part. In particular, one end of the securing element is connected to the coupling section of the first cutter head part and the other end of the securing element can be connected to the coupling section of the second cutter head part. In particular, in the position of use, the other end of the securing element is connected to the first and second cutter head parts.

In particular, in the release position, the other end of the securing element is only (loosely) connected to the first cutter head part and no longer to the second cutter head part. In particular, in the release position, the other end of the securing element is merely pushed through the first cutter head part, so that it can be pulled out (without a screwing movement). In order to release the handle, one or the other end of the securing element is preferably detachable from the first knife head part and preferably easily pulled out or specifically detachable or unscrewed. In particular, the other end of the securing element remains only loosely connected to the first cutter head part in the release position. It is also possible, however, for the other end of the securing element to be secured to the first cutter head part in the release position. For this purpose, a releasable form fit and z. B. a latching or a bayonet lock or the like can be provided. This has the advantage that in the In the release position, only the second cutter head part has to be removed and the remaining parts remain connected to one another.

The through opening of the second cutter head part has at least one thread area corresponding to the threaded section, so that the handle can be screwed to the second cutter head part by means of the threaded section. It is also possible for the through opening of the first cutter head part to have a thread area corresponding to the threaded section, so that the handle can also be screwed to the first cutter head part. This offers an inexpensive and at the same time particularly reliable attachment of the handle to the cutter head.

In particular, in the position of use, the other end of the securing element runs through the first knife head part without being screwed there, and then extends at least partially into the second knife head part and is screwed to the second knife head part.

In particular, the through opening of the first cutter head part is provided without a thread and / or with an oversize in relation to the other end of the securing element. In particular, the other end of the securing element can thereby be inserted through the through opening without a screwing movement. In particular, the second cutter head part (in particular its coupling section) has at least one through opening or at least one blind hole which is equipped with a thread (corresponding to the threaded section).

The first knife head part can preferably be pushed in the direction of the handle when the other end of the securing element is partially screwed out of the second knife head part. In particular, the second knife head part remains stationary with respect to the handle, so that the first and second knife head part move away from one another let slide. As a result, the cutter head parts can be easily detached from one another, so that a blade change can take place particularly safely. The first cutter head part is preferably automatically pushed in the direction of the second cutter head part when the other end of the securing element is screwed into the second cutter head part. In particular, the handle presses against the first knife head part.

It is possible that the handle can be fastened to the first knife head part in a first screw-in depth of the threaded section. The threaded section can preferably be pushed through the first cutter head part without a screw connection. It is preferred and advantageous that, after being pushed through the first cutter head part (or at a second screw-in depth of the threaded section), the second cutter head part can be fastened to the first cutter head part (by screwing the threaded section into the second cutter head part). In particular, the second screw-in depth is deeper than the first screw-in depth. In particular, the thread section extends in the first screw-in depth only into the coupling section of the first cutter head part and in the second screw-in depth also into the coupling section of the second cutter head part. In particular, a maximum screw-in depth of the threaded section is positively limited by the handle resting against the first knife head part and / or by the first knife head part resting against the second knife head part.

The securing element, in particular at least the threaded section, is preferably arranged coaxially in the handle at least in sections. In particular, the securing element extends in a coaxial manner to an outer structure of the handle.

The second knife head part can particularly preferably be clamped against the first knife head part by means of the locking mechanism. In particular, the hairdressing blade can be clamped between the knife head parts by the locking mechanism. For this purpose, the form-fitting device described below is also provided in particular. In particular, the locking mechanism is suitable and designed to move the second knife head part in a linear movement into the position of use and thereby press the knife head parts against one another by means of the form-fitting device (in particular by means of its wedge-shaped form-fitting elements) transversely to the direction of the linear movement and preferably thereby pressing the styling blade between the To clamp the cutter head parts. This offers advantages for the cutting result, since the styling blade is particularly well fixed in the cutter head in such a configuration. In particular, the second cutter head part can be pulled up by screwing the securing element onto the first cutter head part. In particular, the second knife head part is drawn onto the first knife head part in the direction of the handle and / or transversely to the main surface.

It is possible and preferred that the locking device comprises at least one pretensioning device. The pretensioning device is particularly suitable and designed to push the second cutter head part away from the first cutter head part by means of spring force. The pretensioning device can be pretensioned in particular by moving the locking mechanism into the position of use. The pretensioning device is particularly suitable and designed to push the second cutter head part away from the first cutter head part in the release position. The bracing device in particular comprises at least one spring or is designed as such. In particular, at least one spring steel element is arranged between the cutter head parts. For example, at least one spring steel element is attached to the first and / or second cutter head part. This enables a particularly comfortable and safe blade change. The pretensioning device can also be suitable and designed to secure the screw connection of the handle to the first knife head part against undesired loosening.

In an advantageous development, the

Locking device at least one form-locking device. The interlocking device comprises at least one interlocking element arranged on the first cutter head part and at least one corresponding interlocking element arranged on the second cutter head part. The form-locking elements can preferably be clamped to one another by transferring the locking mechanism into the position of use, so that the cutter head parts are held together in a form-fitting manner in addition to the locking mechanism.

The form-fit elements are preferably separable in at least one release direction. The form-locking elements preferably lie against one another in a form-locking manner in at least one holding direction. In particular, the locking device is suitable and designed to preload the form-locking elements by means of the locking mechanism counter to the release direction and to press them against one another in a form-locking manner and, in particular, to wedge them. The release direction runs in particular opposite to the direction in which the second knife head part can be clamped against the first knife head part by means of the locking mechanism. The release direction runs in particular opposite to the holding direction. The direction of release is in particular away from the handle in the longitudinal direction. The holding direction runs in particular is opposite to the release direction.

In particular, the form-locking device also provides a second holding direction which runs transversely to the release direction and / or transversely to the longitudinal direction of the hairdressing knife. The second holding direction runs in particular transversely to the main plane of the Knife head parts and / or transversely to the longitudinal side of the knife head and / or transversely to the longitudinal axis of the handle. The second holding direction extends in particular in the direction in which the two cutter head parts can be lifted from one another. In the release position, the form fit in the second holding direction is preferably canceled, so that the two cutter head parts can be lifted from one another.

The form-fit device is integrated in particular in the cutter head. The form-fit elements are in particular formed in one piece with the respective cutter head part. The form-fit elements are in particular wedge-shaped. In particular, the form-locking elements can be wedged together by moving the locking mechanism into the position of use. In particular, the form-fit element engages under the corresponding form-fit element and / or vice versa.

The hairdressing knife preferably comprises at least one adjusting device for aligning the hairdressing blade in the knife head. In particular, the adjustment device comprises at least one adjustment unit which can at least partially engage in at least one recess in the styling blade. The adjustment unit is preferably provided by at least one of the form-fit elements of the form-fit device. In particular, at least one form-fit element of the first cutter head part and at least one form-fit element of the second cutter head part each provide at least one adjustment unit. Such a configuration is particularly compact and space-saving, since the styling blade is aligned with the components of the locking device. In the position of use, the form-fit element preferably extends through the recess in the styling blade. In particular, in the position of use, both form-locking elements extend through the recess of the styling blade. The adjusting device can be at least one in a cutter head part Include incorporated recess for the styling blade. The receiving trough is adapted in particular to an outer contour of the hairdressing blade, so that the styling blade can be received in the receiving trough in a form-fitting manner.

The form-fit element and / or the adjustment unit are in particular made in one piece with the respective cutter head part. It is also possible for the form-locking element and / or the adjustment unit to be designed separately from the respective knife head part and to be detachably or permanently fixedly connected to the respective knife head part. For example, a screw connection, a rivet connection, an adhesive connection, a press connection and / or a plug connection are possible.

The cutter head comprises in particular two side surfaces, namely a front side and a rear side. The cutter head parts each provide a side surface. The cutter head parts in particular each provide a side half of the working section. The cutter head comprises at least two working sections which are arranged on opposite longitudinal sides of the cutter head. The working sections are in particular arranged diagonally offset on the opposite longitudinal sides. The cutter head parts are designed in particular in the form of plates. In the position of use, the cutter head parts are in contact with one another, in particular with their main surfaces.

The longitudinal axis of the handle runs in an imaginary line in particular through the cutter head in the longitudinal direction and / or in a main plane of the cutter head. The longitudinal axis of the handle runs in particular along an imaginary line in a plane arranged between the knife head parts in which the hairdressing blade can preferably also be received. The longitudinal axis of the handle runs along an imaginary line especially in a main plane of the styling blade. The longitudinal axis of the securing element preferably runs like that of the handle.

The handle is arranged in particular laterally on a broad side of the cutter head and preferably of the first cutter head part. The broad side runs in particular transversely to the longitudinal side with the at least one working section.

In particular, a longitudinal axis of the handle runs in an imaginary line parallel to the longitudinal side and preferably transversely to the broad side. In particular, the long side of the cutter head is aligned parallel to the longitudinal axis of the handle. In particular, the handle is arranged laterally on the cutter head in such a way that the cutting movement takes place along the longitudinal axis of the handle. In particular, the cutter head is not set across the handle. In particular, the long sides of the cutter head and the longitudinal axis of the handle are oriented in the same direction. In particular, the longitudinal sides of the cutter head and the longitudinal axis of the handle have the same main orientation.

Within the scope of the present invention, parallel courses or arrangements in the plane can also have a deviation which can be up to 10 ° or up to 15 ° or even up to 30 °. It is particularly preferred that the longitudinal axis of the handle is not arranged in an imaginary line transversely and in particular not at right angles or not at a 45 ° angle to the main plane of the cutter head. In the context of the present invention, instead of a course in the plane, a course arranged parallel to the plane is also possible.

A hairdressing knife which is advantageously suitable for use with the invention is described in the international patent application PCT / EP2018 / 058073. The entire disclosure of PCT / EP2018 / 058073 hereby becomes part of the disclosure content of the present application. In particular, the cutter head consists of the at least two cutter head parts. The cutter head parts are in particular separate parts. The cutter head parts are in particular made in one piece, preferably made of one piece of material. It is also possible that the cutter head, in addition to the at least two cutter head parts, has at least one support structure to which the handle and at least the first cutter head part and / or the second cutter head part can be fastened.

The cutter head and / or the handle are particularly preferably manufactured at least partially from stainless steel or tool steel. It is also preferred that the cutter head and / or the handle are at least partially made from a cast metal material. It is also possible and advantageous for the cutter head and / or the handle to be manufactured using at least one additive manufacturing process.

In particular, the cutter head parts are completely detachable from one another. It is also possible, however, for the cutter head parts to remain connected to one another in sections in the release position. For this purpose, for example, a hinge and / or a flexible connecting element or the like can be provided.

The first knife head part is particularly characterized in that it can be fastened or is connected to the handle. In particular, the first knife head part has at least one handle receptacle. The second cutter head part can in particular be attached to the first cutter head part. In particular, the second knife head part can be attached to the handle indirectly through the first knife head part. It is also possible that the second knife head part can be fastened directly to the handle. In particular, the styling blade can be received between the knife head parts. In particular, the hairdressing knife comprises at least one hairdressing blade, preferably as described here. The applicant reserves the right to claim a hairdressing blade for the previously described hairdressing knife. The hairdressing blade comprises at least one cutting edge and preferably at least two cutting edges and at least one recess for an adjusting device for aligning the hairdressing blade in a cutter head. The width of the styling blade corresponds to a maximum of half a length of the styling blade. The hairdressing blade is designed in particular as described with reference to the hairdressing knife.

With such a ratio of width to length, the hairdressing blade according to the invention can be used particularly well in a knife head with an angled contact surface and preferably in the hairdressing knife according to the invention.

The styling blade preferably has a rectangular outer contour, in particular with rounded corners. By means of such a shape, the blade and a receiving trough provided for it in the cutter head can be produced in a particularly dimensionally stable and at the same time cost-effective manner. This offers a particularly play-free accommodation of the blade in the cutter head. Right-angled corners or non-rounded corners can also be provided.

The recess is particularly preferably designed as a rectangular elongated hole. The rectangular elongated hole has in particular right-angled corners or no rounded corners. This offers a secure and precise fit on the adjustment unit. In particular, the adjustment unit is also designed with matching right-angled corners or edges.

It is preferred that the recess extends over more than 20% of the width of the styling blade. It is also preferred that the recess extends over more than 75% of the length of the styling blade. The recess preferably extends over more than 25% of the width and / or more than 85% of the length. This offers a particularly firm fit of the styling blade in the cutter head or on the adjustment unit. In addition, with such a recess, the adjustment unit required for this can also be produced particularly economically with a high degree of accuracy of fit.

In particular, only one common hairdressing blade is provided for all the intended work sections. For example, the styling blade is equipped with two opposite cutting edges in order to supply opposite working sections with one cutting edge each. The hairdressing blade has in particular at least two cutting edges, in particular on its long sides.

It is possible and advantageous for the handle to be segmented with respect to its longitudinal axis. In particular, the handle comprises at least two axial segments and preferably at least three or at least four or more axial segments. In particular, the invention comprises a system made up of a plurality of mutually interchangeable segments. In particular, the exchangeable segments differ at least in terms of their materials and / or surface coating and / or surface properties and / or cross-sectional shape and / or length and / or in terms of at least one other geometric property and / or their weight. In particular, a number of the segments of a handle can be changed by replacing them with other segments of the system. For example, a handle made up of three segments can thereby be converted into a handle made up of four or more segments. Such a system enables an inexpensive and targeted individualization of existing hairdressing knives. It is also possible to adjust the center of gravity. The handle can also comprise only one segment. In particular, at least one segment is non-rotatably with connected to the securing element and preferably to the threaded portion.

Further advantages and features of the present invention emerge from the exemplary embodiments, which are explained below with reference to the accompanying figures.

In the figures show:

1 shows a purely schematic representation of a hairdressing knife according to the invention in a perspective view;

2 shows a purely schematic detailed illustration of a cutter head of the hairdressing knife in a perspective view;

3 shows a schematic detailed illustration of a first knife head part of the hairdressing knife in a perspective view;

4 shows a schematic detailed illustration of a second knife head part of the hairdressing knife in a perspective view;

FIG. 5 shows the knife head part of FIG. 4 equipped with a styling blade; FIG.

6 shows a purely schematic detailed illustration of a first knife head part of a further development of the hairdressing knife in a perspective view;

7 shows a purely schematic representation of an embodiment of the hairdressing knife in a side view; and 8 shows a purely schematic representation of a further embodiment of the hairdressing knife in a side view.

FIG. 1 shows a hairdressing knife 1 according to the invention with a knife head 2 and a hairdressing blade 4 received therein. A handle 10 is attached to the side of the knife head 2 in such a way that the handle 10 and the knife head 2 are aligned with their longitudinal axes in the same direction.

The cutter head 2 here has two diagonally opposite working sections 3, which are set back with respect to an alignment line 120 of a longitudinal side 12. The styling blade 4 here has two opposing cutting edges 14, each of which is only accessible in one working section 3. The recess of the working sections 3 is curved here.

The cutter head 2 here comprises two cutter head parts 201, 202, between which the styling blade 4 is received. The first knife head part 201 is connected to the handle 10 by means of a handle receptacle 11. The second cutter head part 202 is fastened to the first cutter head part 201 and serves as a kind of cover for the latter. The two cutter head parts 201, 202 are flush with one another on the longitudinal sides 12.

Each cutter head part 201, 202 provides a side surface 22, 32 of the cutter head 2. On each side surface 22, 32 there is a substantially diagonal elevation 52, which separates the two opposite working sections 3 from one another.

The cutter head 2 here has a guide device 5 by means of which the hair is guided along the cutter head 2 at a defined angle during cutting. The guide device 5 provides two for each working section 3 here Contact areas 15 are available. A contact surface 15 is provided for each working section 3 on each side surface 22, 32. The contact surfaces 15 on the side surface 22 are not visible in the illustration shown here.

The two contact surfaces 15, which are arranged on a common side surface 22, 32, are separated from one another by the elevation 52 here.

The guide device 5 is here in one piece with the cutter head

2 trained. The contact surfaces 15 result from a correspondingly wedge-shaped shape of the cutter head 2 or its cutter head parts 201, 202.

The handle 10 and the cutter head 2 here have a common balance point 20 which is arranged in the handle 10. In the handle 10 is z. B. a cavity is provided in which a balance weight 9, not visible here, can be accommodated. In this case, for example, a lead weight 9 is selected with a weight such that the handle 10 has the same overall weight as the cutter head 2. The hairdressing knife is then at a standstill

I in an equilibrium position or in balance when it rests on balance point 20.

The longitudinal axis of the cutter head 2 runs parallel to the long sides 12 or to the alignment line 120 and centrally through the handle 10 and through the central main plane of the cutter head 2 and also the styling blade 4. The broad sides run transversely to the longitudinal axis. The handle mount is on one broad side

II arranged so that the handle 10 can be attached to the side of the cutter head 2.

In order to insert or change the styling blade 4 or to turn it so that an unused cutting edge 14 is in the working section

3 is, the second cutter head part 202 can be here from the first Knife head part 201 can be removed. In order to be able to carry out such a blade change particularly safely and comfortably, the hairdressing knife 1 is equipped with a locking device 200. The locking device 200 comprises a locking mechanism 203 which is not visible in the interior and which can be transferred from a use position to a release position and back via an operating element 204.

In the position of use, the cutter head parts 201, 202 are firmly coupled to one another, as shown here. In the release position, the knife head parts 201, 202 are then decoupled from one another, so that the second knife head part 202 can be removed from the first knife head part 201 and the styling blade 4 is conveniently and safely accessible. The operating element 204 is provided here by the handle 10. By turning the handle 10, the locking mechanism 103 is transferred from the release position to the use position and vice versa.

The cutter head 2 is shown in greater detail in FIG. For the sake of clarity, the handle 10 is not shown here.

FIG. 3 shows the inner side of the first knife head part 201 opposite the side surface 22. An adjusting device 6 for aligning the styling blade 4 and parts of the locking device 200 can be seen particularly well on this side.

The adjusting device 6 here comprises three adjusting units 26 arranged on the first knife head part 201. The adjusting units 26 engage in a recess 16 in the styling blade 4, as shown in more detail in FIG. 5. A movement of the styling blade 4 in its longitudinal direction and also transversely to its longitudinal direction is blocked in a form-fitting manner. The adjusting device 6 here also comprises a receiving trough 36 which is let into the knife head part 201 and which is adapted to the outer contour of the styling blade 4. The depth of the receiving recess 36 here corresponds at least approximately to the strength of the hairdressing blade 4. This also blocks undesired movement of the hairdressing blade 4.

The adjusting device 6 is arranged here at an angle or at an angle to the longitudinal axis of the cutter head 2. As a result, the styling blade 4 used is aligned with its cutting edges 14 at a defined angle to the longitudinal axis or to the longitudinal sides 12 of the cutter head 2. For example, the angle of inclination is 3 °.

In FIG. 4, the inner side of the second cutter head part 202 opposite the side surface 32 is shown. The parts of the adjusting device 6 and the locking device 200 corresponding to the first cutter head part 201 can be seen particularly well here.

FIG. 5 shows the knife head part 202 described with reference to FIG. 4 with a styling blade 4 inserted as intended.

The locking device 200 will now be described in more detail with reference to FIGS. The locking mechanism 203 here comprises a securing element 213 with a threaded section 223 and two coupling sections 233, 243. The first coupling section 233 is arranged on the first cutter head part 201 and the second coupling section 243 is arranged on the second cutter head part 202.

The first coupling section 233 has a through opening 211 with a threaded area 221 designed as an internal thread. The second coupling area 243 also has a through opening 212 with an internal thread Thread area 222. The threaded areas 221, 222 are designed to correspond to the threaded section 123 of the securing element 113. The securing element 213 can thus be screwed from the outside into the first knife head part 201 and from there further into the second knife head part 202. This results in a screw connection which secures the second knife head part 202 in a non-positive and positive manner on the first knife head part 201.

In FIGS. 2 and 3, the securing element 213 is partially screwed into the first cutter head part 201. In FIGS. 4 and 5, the securing element 213 is shown in a position in which it has not yet entered the second cutter head part 202.

The handle 10 is provided here as the operating element 104 for the locking mechanism 203. For this purpose, the handle 10 is non-rotatably connected to the securing element 113. The securing element 213 is centered or integrated coaxially into the handle 10 here. The locking mechanism 103 is operated by turning the handle 10. By turning the handle in one direction, the securing element 213 is screwed into the cutter head parts 201, 202 and screwed out again by turning in the opposite direction.

In order to get to the hairdressing blade 4 when the hairdressing knife 1 is in the position of use, the handle 10 only has to be turned out of the knife head 2, for example by turning it counterclockwise. As soon as the securing element 213 is unscrewed from the coupling section 243 of the second knife head part 202, the second knife head part 202 can be removed and the blade is safely accessible.

If the handle 10 is rotated further in the same direction, the securing element 213 can further and finally completely the first cutter head part 201 are unscrewed. As a result, the handle 10 together with the securing element 213 can be released from the cutter head 2.

To attach the handle 10 to the cutter head 2, the handle is rotated in the other direction and the securing element 213 is screwed back into the first cutter head part 201. At a first screw-in depth, the securing element 213 does not yet extend out of the coupling section 233, so that the second cutter head part 202 can be placed on the first cutter head part 201.

If the handle 10 is rotated further, the screw-in depth increases and the securing element 213 extends into the coupling section 243 of the second cutter head part 202.By turning the handle 10 accordingly, the screw connection is tightened and the second cutter head part 202 is clamped against the first cutter head part 201.

The locking device 200 here comprises a

Form-fit device 206 with a form-fit element 216 on the first cutter head part 201 and a corresponding form-fit element 226 on the second cutter head part 202.

202 in the position of use in addition to the screw connection of the securing element 213 secured in a form-fitting manner. At the same time, the styling blade 4 is also clamped tightly as a result.

By transferring the locking mechanism 203 into the position of use, the second knife head part 202 is pulled towards the first knife head part 201 as described above. In the process, the form-fit elements 216, 226 are also pulled together so that they wedge themselves. This results in a particularly firm and play-free fit of the knife head parts 201, 202. At the same time, the styling blade 4 is clamped particularly firmly or tightly, so that a particularly good cutting performance is achieved. The form-fit elements 216, 226 are designed here in one piece with the respective cutter head part 101, 202.

In order to cancel the form fit, the second knife head part 202 must be removed from the first knife head part 201 in the longitudinal direction and in a direction facing away from the handle 10. Opposite to this release direction and also transversely to this release direction, the form fit takes place here by the form fit elements 216, 226. The form fit elements 216, 206 and 20 are wedge-shaped here so that one form fit element 216 can grip under the other form fit element 226 and vice versa.

The form-fit elements 216, 226 here also each form an adjustment unit 26 of the adjustment device 6. For this purpose, the form-fit elements 216, 226 are designed and arranged here in such a way that they extend through the recess 16 in the styling blade 4 in the position of use.

The form-fit elements 216, 226 and the adjustment unit 26 are designed here in one piece with the respective knife head part 201, 202. However, an embodiment is also preferred in which the form-fit elements 216, 226 or the adjustment unit 26 are designed separately from the respective knife head part 201, 202 and are detachably or permanently fixedly connected to the respective knife head part 201, 202. For example, a screw connection is provided.

The first knife head part 201 of the hairdressing knife 1 is shown in FIG. 6, as it essentially corresponds to the knife head part 201 shown in FIG. In addition, a pretensioning device 205 with a spring 215 made of spring steel is provided here. The spring 215 is pretensioned by moving the locking mechanism 203 into the position of use. If the locking mechanism 203 is then released and in the Brought the release position, the spring 215 presses the second cutter head part 202 from the first cutter head part 201. As a result, the user receives a haptic signal that the release position has been reached and the second cutter head part 202 can now be easily removed from the first cutter head part 201.

In FIG. 1, the styling blade 4 is shown in more detail in the area outlined by dashed lines in a top view. The styling blade 4 is equipped here with two opposing cutting edges 14. The styling blade 4 is rectangular here with rounded corners.

In the side surface of the styling blade 4, the recess 16 is made, which is designed here as a rectangular elongated hole. The elongated hole here has right-angled or non-rounded corners. The length 46 of the recess 16 corresponds to the distance between the two outer adjustment units 26 of the adjustment device 6 of the cutter head 2. The width 56 of the recess 16 here corresponds to the width of the individual adjustment units 26.

The styling blade 4 here has a width 24 which is in a ratio of 1: 2.29 to the length 34. For example, the width is 2419 mm. For example, the length 34 is 43.5 mm. The thickness of the styling blade 4 is 0.1 mm, for example. For example, the width 56 of the recess is 165 mm and the length is 4637.2 mm.

Such a dimensioning of the hairdressing blade 4 is particularly suitable for the previously described hairdressing knife 1, since this results in particularly advantageous angles for the contact surfaces 15 without the knife head 2 becoming too bulky.

In FIGS. 7 and 8, the hairdressing knife 1 is shown with a handle 10 which is segmented with respect to its longitudinal axis is trained. The handle 10 according to FIG. 7 has three axial segments 301-303. The handle 10 according to FIG. 8 has four axial segments 301-304. The segments 301-304 of a handle 10 are here made of different materials, for. B. stainless steel, wood and / or plastic and / or differ in their surface properties and z. B. in color. In particular, here at least one of the segments 301-304 is non-rotatably connected to the securing element 213 and preferably to the threaded section 223.

The handles 10 shown here belong in particular to a system which comprises a plurality of mutually interchangeable segments 301-304. For example, a second segment 302 made of stainless steel against another second segment 302 of the system made of e.g. B. wood or plastic can be replaced. By exchanging the segments 301-304, the number of segments 301-304 can also be changed. For example, the third segment 303 of the handle 10 according to FIG. 7 can be made by two shorter segments 303, 304, as shown in FIG. Overall, the length of the handle 10 remains unchanged here.

For example, in FIG. 7 the length of the first segment is 30139 mm, the length of the second segment 302 is 107.2 mm and the length of the third segment is 30329 mm. For example, in FIG. 8 the first and second segments 301, 302 have the same length. The third segment 303 here has a length of 23.5 mm, for example. The fourth segment 304 here has a length of 5.5 mm, for example.

A particular advantage of the locking device presented here is that the cutter head parts 201, 202 are drawn particularly close to one another in the position of use. As a result, a desired gap dimension can be maintained and unequal distances or even play between the cutter head parts 201, 202 can be effectively avoided become. In FIG. 2, a dividing line 207 is shown between the cutter head parts 201, 202, on which there is a particularly small component spacing. Due to the tight tightening of the second cutter head part 202 to the first cutter head part 201, there is no or almost no gap at the dividing line 207. At the dividing line 207, the second cutter head part 202 here has a convex contour and the first cutter head part 201 has a concave contour. This also results in a particularly small gap.

LIST OF REFERENCE NUMERALS: Hairdressing knife 200 locking device knife head 201 knife head part working section 202 knife head part hairdressing blade 203 locking mechanism guide device 204 operating element adjusting device 205 pretensioning device balancing weight 206 form-locking device0 handle 207 dividing line 1 handle receptacle 211 through opening 2 long side 212 through opening 4 cutting edge area 213 2 locking surface 5 contact surface 215 spring 221 recess Thread area 4 width 223 thread section 6 adjusting unit 226 form-fit element 2 side surface 233 coupling section 4 length 243 coupling section 6 receiving recess 301 segment 6 length 302 segment 2 elevation 303 segment 6 width 304 segment 20 alignment line

Claims

Expectations : 1. Hairdressing knife (1) for styling head hair, with at least one cutter head (2) and with at least one handle (10) arranged laterally on the cutter head (2), with at least one on at least one longitudinal side (12) of the cutter head (2) Working section (3) is arranged, which is set back with respect to an alignment line (120) of the longitudinal side (12) and wherein at least one hairdressing blade (4) with at least one cutting edge (14) can be received in the cutter head (2) and can be arranged in such a way that its The cutting edge (14) is at least partially exposed in the working section (3) and does not protrude beyond the alignment line (120), the cutter head (2) having at least two cutter head parts (201, 202) that can be detachably coupled to one another by means of at least one locking device (200), namely one first knife head part (201) and a second knife head part (202), wherein the locking device (200) has at least one locking mechanism that can be actuated via at least one operating element (204) s (203) and wherein the operating element (204) is provided by at least part of the handle (10) and wherein by actuating the operating element (204), the locking mechanism (203) can be transferred at least from a use position to a release position in order to achieve the Knife head parts (201, 202) coupled to one another to be able to be released from one another and wherein the locking mechanism (203) comprises at least one securing element (213) which can be fixed to the second knife head part (202) by means of the operating element (204) in order to assume the position of use in the position of use extends at least from the first knife head part (201) at least partially into the second knife head part (202), characterized in that the first knife head part (201) has at least one Through opening (211) through which the securing element (213) extends in such a way that one end of the securing element (213) is connected to the handle (10) and the other end of the securing element (213) can be connected to the second cutter head part (202) is. 2. Hairdressing knife (1) according to the preceding claim, wherein the locking mechanism (203) can be transferred from the release position to the use position by actuating the operating element (204) in order to couple the knife head parts (201, 202) to one another. 3. Hairdressing knife (1) according to one of the preceding claims, wherein the locking mechanism (203) can be actuated by means of a rotary movement of the operating element (204). 4. Hairdressing knife (1) according to one of the preceding claims, wherein the operating element (204) is provided by at least one elongate section of the handle (10) and preferably by the handle (10) itself. 5. Hairdressing knife (1) according to one of the preceding claims, wherein the locking mechanism (203) is suitable and designed to secure the second knife head part (202) non-positively and / or positively on the first knife head part (201). 6. Hairdressing knife (1) according to one of the preceding claims, wherein the locking mechanism (203) is suitable and designed to move the second knife head part (202) in a linear movement and / or plane parallel to the first knife head part (201) into the position of use. 7. hairdressing knife (1) according to any one of the preceding claims, wherein by an operationally fastening the handle (10) to the first knife head part (201) at the same time the second knife head part (202) can also be fixed to the first knife head part (201) by means of the locking mechanism (203). 8. hairdressing knife (1) according to any one of the preceding claims, wherein to assume the release position, the securing element (213) by means of the operating element (204) of the second Knife head part (202) is detachable. 9. Hairdressing knife (1) according to one of the preceding claims, wherein the securing element (213) comprises at least one threaded section (223) which can be screwed into at least the second knife head part (202) by means of the operating element (204). 10. Hairdressing knife (1) according to one of the preceding claims, wherein the securing element (213) is non-rotatably connected to the operating element (204), preferably non-rotatably to the handle (10). 11. Hairdressing knife (1) according to one of the preceding claims, wherein the handle (10) can also be releasably attached to the first and / or second knife head part (201) by means of the securing element (213). 12. Hairdressing knife (1) according to one of the preceding claims, wherein the through opening (211) is designed without a thread and / or with an oversize in relation to the other end of the securing element, so that the other end of the securing element passes through the through opening (211) without a screwing movement is plugged through. 13. Hairdressing knife (1) according to one of the preceding claims, wherein the securing element (213) (in particular at least 2891PI62PCT 35 PP.1P.P020 CanWO 2021/130240 PCT / EP2020 / 087656 the threaded section) is arranged at least in sections coaxially in the handle (10). 14. Hairdressing knife (1) according to one of the preceding claims, wherein the second knife head part (202) by means of the locking mechanism (203) against the first knife head part (201) can be tensioned. 15. Hairdressing knife (1) according to one of the preceding claims, wherein the locking device (200) comprises at least one pretensioning device (205) which is suitable and designed to push the second knife head part (202) away from the first knife head part (201) by means of spring force. 16. Hairdressing knife (1) according to one of the preceding claims, wherein the locking device (200) has at least one form-locking device (206) with at least one form-locking element (216) on the first knife head part (201) and at least one form-locking element (226) on the second knife head part ( 202) and wherein the form-fit elements (216, 226) can be clamped to one another by moving the locking mechanism (203) into the position of use, so that the knife head parts (201, 202) are held together in a form-fitting manner. 17. Hairdressing knife (1) according to the preceding claim, comprising at least one adjusting device (6) for aligning the hairdressing blade (4) in the cutter head (2), the adjusting device (6) at least one at least partially in at least one recess (16) in the styling blade (4) comprises adjusting unit (26) engaging and wherein the adjusting unit (26) is provided by at least one of the form-fitting elements (216, 226).