EP3117972B1 - Cutting set for a machine for cutting hair with hair transport element and machine for cutting hair with hair transport element - Google Patents

Description

The present invention relates to a cutting set for a hair clipper according to the preamble of patent claim 1, a hair clipper according to the preamble of patent claim 11, as well as a hair transport element according to the preamble of patent claim 12.

Hair clippers are known in the art in a variety of designs. For example, describes the DE 60 2005 003 368 T2 a hair trimmer comprising a housing and at least one cutting unit comprising a fixed cutting member and a driven cutting member which reciprocates with respect to the fixed cutting member.

Hair clippers with multiple cutting units are also known in the art. For example, the DE 20 2013 103 187 U1 a hair clipper with two cutting units.

In the DE 10 2011 076 577 B3 a cutting set receptacle is disclosed for a hair clipper comprising a receptacle base attachable to the hair clipper and a receptacle leg pivotally mounted to the receptacle base to which a replaceable cutting set is arrangeable, wherein a blocking member movable between a pivot position and a blocking position is provided is designed to block a pivoting movement of the receiving leg in the direction of the receiving base without arranged on the receiving leg cutting set.

A hair cutting machine with an interchangeable cutting set, comprising at least a shearing comb and a shearing knife oscillating in a substantially parallel manner to the front edge of the shearing comb in the transverse direction, and a Schnittlängenverstelleinrichtung consisting of an actuating element which is articulated to a housing of the hair clipper and on the Acts cutting set such that a relative displacement between the shearing comb and the shearing blade in the longitudinal direction is possible, for example, in the DE 10 2009 015 276 A1 disclosed.

• So kommt es beim Schneiden von Haaren mit den im Stand der Technik bekannten Schneidsätzen für Haarschneidemaschinen, je nach Schneidposition zu einer Anhäufung von Haarabschnitten auf der Haarschneidemaschine. Diese Anhäufung von Haarabschnitten versperrt zum einen die Sicht auf den Schneidbereich und verschlechtert zum anderen die Zufuhr noch nicht geschnittener Haare. Der Friseur muss daher nach jeder Anhäufung von Haaren die Maschine zur Seite kippen, bzw. die Haare vom Schneidsatz der Maschine abschütteln. Dies ist insbesondere dann lästig, wenn ein letzter Haarfeinschnitt erfolgen soll.

However, the known hair clippers and cutting sets for hair clippers have a serious disadvantage:

• Thus, when cutting hair with the known in the prior art cutting sets for hair clippers, depending on the cutting position to an accumulation of hair on the hair clipper. This accumulation of hair locks on the one hand the view of the cutting area and on the other deteriorates the supply of not yet cut hair. The hairdresser must therefore tilt the machine to the side after each accumulation of hair, or shake off the hair from the cutting set of the machine. This is particularly troublesome when a final hair incision is to take place.

Object of the present invention is therefore to provide a cutting set for a hair clipper, which does not have this disadvantage, and to provide a hair clipper with such a cutting set.

This object is achieved by a cutting set according to claim 1, by a hair clipper according to claim 11, as well as by a Haartransportelement according to claim 12. Advantageous embodiments are specified in the respective subclaims.

The cutting set according to the invention has at least one fixed or adjustable shearing comb and a shearing blade drivable in an oscillating manner substantially parallel to the front edge of the shearing comb, and a hair transporting element having a toothed toothing arrangement arranged substantially along and spaced from the cutting edge of the shearing blade are. The hair transport element can be part of the cutting set, for example if the entire cutting set is exchangeable. The shearing blade is arranged between the shearing comb and the hair transporting element, wherein the cutting edge of the shearing blade projects beyond the front edge of the hair transporting element formed by the tips of the teeth of the transporting toothing. With an adjustable cutting comb the distance of the hair transporting device remains the same relative to a housing of the hair clipper.

Preferably, the cutting set according to the invention is designed as a replaceable head of a hair cutting machine, in which advantageously shear blade, shearing comb and Haartransportelement are already interconnected, so that it can be quickly replaced with a conventional known in the art cutting set, which has no hair transport element.

The transport toothing advantageously has a substantially sawtooth-shaped cross-sectional profile. A "substantially sawtooth-shaped profile" is to be understood here as a cross-sectional profile in which the teeth respectively have a steep flank and a flat flank. The steep flank is determined by the fact that their angle of rise relative to the base line of the transport toothing, ie to the line on and along which the teeth of the transport toothing are arranged, is steeper than the angle of rise between the flat flank and the baseline. The tips of the teeth can also be flattened and / or rounded. The steep flanks of the teeth preferably have angles of substantially 90 ° relative to the baseline, wherein the term "substantially 90 °" in this context is intended to include angles between 80 ° and 100 °.

The hair transport element is either firmly connected to the shearing blade, wherein it is preferably connected flat with the shearing blade, or it cooperates with the movement of the shaver relative to the shearing comb via a connecting element. The hair transport element can then be connected in an oscillating manner, for example, via a driver with the shearing blade. The fact that the shaving blade with the hair transport element when cutting the hair quickly moves back and forth on the cutting comb, the hair is cut off and on the also reciprocating steep slopes of the saw teeth of the hair transport element in the direction of the reciprocating motion the shear blade, so in the transverse direction to the cutting direction, accelerated, moved away from the hair clipper and removed. The cutting direction is a direction perpendicular to the cutting edge of the doctor blade.

Since hair is cut along the entire cutting edge, the transport toothing extends in advantageous embodiments substantially along the entire cutting edge of the doctor, so that the teeth of the transport toothing substantially along the entire cutting edge of the doctor blade are arranged on the hair transport element to capture as possible all cut hair and remove it from the hair clipper.

Thus, the cut hairs are not only accelerated in one of the two transverse directions of the reciprocating motion of the doctor blade relative to the shearing comb, but a portion of the hair sections in the one transverse direction and the other part of the hair sections is accelerated in the other transverse direction, so that the hair sections are dropped both to the left and to the right of the hair clipper, the transport teeth on a first and a second portion, wherein the steep edges of the saw teeth of the first portion of the transport teeth and the steep edges of the saw teeth of the second portion of the transport teeth in substantially pointing in opposite directions. The angle between the two substantially mutually opposite directions is preferably between 160 ° and 200 °.

In a particularly preferred embodiment, the saw teeth are formed mirror-symmetrically to the saw teeth in the second section of the transport teeth in the first section of the transport teeth, wherein the mirror axis is perpendicular to the base line of the transport teeth and centrally through the feed teeth, so that the first section and the second section for forming the transport teeth mirrors mirror symmetry to each other so that the steep flanks of the teeth of the transport teeth facing each other in opposite directions. As a result, cut hairs can be dropped on both sides of the hair clipper.

In an advantageous embodiment, the transport toothing has in the center a central tooth, which can be triangular or triangular, for example, and preferably has two steep flanks. However, the central tooth may for example also be rectangular or trapezoidal. In the case of a mirror-symmetrical arrangement of the teeth of the transport teeth, the mirror axis extends through the center of the central tooth through, so that both sections of the transport toothing each have a half center tooth.

The teeth of the transport teeth have substantially triangular or triangular cross-sectional profiles.

The envelope of the transport toothing has essentially four interconnected sections which enclose or envelop the transport toothing. The first portion of the envelope is formed by the leading edge of the hair transport element, which is defined by the total number of shortest connections between adjacent tips of individual teeth of the transport toothing. The second section is formed by the base line of the transport toothing, that is to say by the line on which the base surfaces of the teeth lying opposite the tips of the teeth are arranged. The third and fourth sections of the envelope are formed by the two lateral boundaries of the transport toothing.

The tips of the teeth of the transport toothing thus span the first part of the envelope. Advantageously, the first part of the envelope convexly limits the transport toothing, wherein a rectilinear boundary in this disclosure should also be referred to as a convex boundary. Preferably, the transport toothing is designed so that the envelope the transport toothing surrounds the entire transport toothing convex.

In a particularly preferred embodiment, the leading edge of the hair transport element runs parallel to the cutting edge of the shearing blade. The distance between the front edge of the hair transport element, ie the leading edge of the transport toothing and the cutting edge of the doctor blade is preferably between 1 mm and 5 mm. Thus, it can be optimally ensured that the cut hairs are moved laterally away from the hair transporting member from the center of the hair cutting machine.

The distance between the leading edge of the cutting comb and the cutting edge of the doctor blade is preferably adjustable with an actuator which is either coupled to the cutting set and thus may be part of the cutting set or to the hair clipper. Preferably, the relative position of the cutting edge of the doctor blade to the leading edge of the hair transporting member remains the same when the distance between the leading edge of the cutting comb and the cutting edge of the doctor blade is changed, but it is also conceivable training in which this distance can be varied to, je to allow for optimal hair removal from the hair clipper after request to the length of the hairpieces.

The hair clipper according to the invention is preferably driven electrically. It has, in addition to the cutting set according to the invention, advantageously a housing which is firmly connected, for example, with the shearing comb and encloses an electric motor for oscillating driving of the shearing blade. It preferably still has a driver on, which is connected to the electric motor and the shearing blade so that it oscillates the shearing blade, preferably in the transverse direction to the cutting direction, drives when the electric motor is turned on. The shearing comb may optionally be attached to the housing. Advantageously, however, the hair transport element is either firmly connected to the shearing blade or connected to the shearing blade so that the hair transporting element moves with the shearing blade, when the shearing blade is driven to oscillate, so that the accumulation of the hair sections does not obstruct the view of the cutting area and the supply to cutting hair does not deteriorate or block. The hair transport element of the cutting set of the hair clipper has, in one possible embodiment, an engagement for receiving the driver.

The terms used in the following description, such as top, bottom, left and right, and the like, refer to the figures and are not intended to be limiting in any way, even if they refer to preferred embodiments. The phrase "substantially" in terms of angles and arrangements, is intended to include deviations of up to 20 °, preferably to 10 °, unless otherwise specified.

Fig. 1

eine Haarschneidemaschine,

Fig. 2

einen Schneidsatz einer Haarschneidemaschine mit einem erfindungsgemäßen Haartransportelement,

Fig. 3

ein Beispiel des erfindungsgemäßen Haartransportelements,

Fig. 4

vier weitere Beispiele erfindungsgemäßer Haartransportelemente,

Fig. 5

eine schematische Darstellung des erfindungsgemäßen Haartransportelements,

Fig. 6

die Hüllkurve einer möglichen Transportzahnung relativ zur Schneidkante des Schermessers.

The invention will be explained in more detail with reference to drawings. Show it:

Fig. 1

a hair clipper,

Fig. 2

a cutting set of a hair clipper with a hair transport element according to the invention,

Fig. 3

an example of the hair transporting element according to the invention,

Fig. 4

four further examples of hair transport elements according to the invention,

Fig. 5

a schematic representation of the hair transport element according to the invention,

Fig. 6

the envelope of a possible transport toothing relative to the cutting edge of the shear blade.

FIG. 1 shows a hair clipper 1 with a cutting set 2, and a housing 4, in which an electric motor (not shown) is arranged. The electric motor can be switched on or off with an electric switch 6.

FIG. 2 shows a part of the cutting set 2 of FIG. 1 with a shearing blade 8 and a hair transport element 10, which has a transport toothing 12, which in the present case is formed integrally with the hair transport element 10. The hair transport element 10 is fixedly connected to the cutter 8 and moves back and forth with it, so that the transport teeth 12 thrown off cut hair 14 to the left and to the right and so the hair sections 14 automatically moved away from the cutting set 2 and both the view of the still cut off Hair releases, as well as the supply of new hair sections relieved.

The hair transport element 10 has a base line 16, on which the transport toothing 12 sits, or on which the individual teeth of the transport teeth 12 are arranged. Parallel to the cutting edge 18 of the Schermessers 8, which also as dashed Line in FIG. 2 is shown, the front edge 20 of the Haartransportelements 12 is arranged and shown as a dashed line 20. The front edge 20 of the hair transport element 12 defines, together with the base line 16 of the transport toothing 12 and the two lateral boundaries of the transport toothing 12, an envelope 21 which convexly envelops the transport tooth 12. The in FIG. 2 Cutting set 2 shown further comprises a cutting comb 24, the front edge 22 is also indicated as a dashed line.

In FIG. 3 an example of a hair transport element 10 is shown enlarged again. The transport toothing 12 has a central tooth 26, two through holes 28, which serve to secure the hair transport element 10 to the shearing blade 8, and an engagement 30 for a driver (not shown). The hairs 14, which are cut off to the right of the central tooth 26 of the hair transporting member 10, by the reciprocation of the Haartransportelements 10, which is correlated with the reciprocating movement of the blade 8 relative to the shear comb 24, of saw teeth 32, the are arranged to the right of the central tooth 26, transported to the right and dropped in the direction of the right side of the Haartransportelements 10. The hairs 14 cut off the razor blade 8 to the left of the center tooth 26 are transported leftward by the saw teeth 32 located to the left of the center tooth 26 on the hair transporting member 10 and are thrown toward the left side of the hair transporting member 10.

FIG. 4 FIG. 4 shows four further examples of hair transport elements 10.

As in particular in FIG. 4a can be seen, the transport teeth 12 of the hair transport member 10 in addition to a central tooth 26 sawteeth 32, which each have a steep flank 34 and a flat edge 36. The steep flanks 34 of the saw teeth 32, which are arranged to the left of the central tooth 26, point to the left, while the steep flanks 34, the saw teeth 32, which are arranged to the right of the central tooth 26, point to the right. Characterized in that the steep flanks 34 on both sides of the transport teeth 12 each outwardly, ie in substantially opposite directions, it can be ensured that cut hairs 14, which are cut off on the left side of the hair clipper 1, by the reciprocation of the hair-transporting member 10 are thrown to the left while hairs 14 cut off at the right side of the hair-cutting machine 1 are thrown to the right.

FIG. 4b shows a Haartransportelement 10, similar to FIG. 4a However, it is also possible to provide hair-transport elements 10 which dispose the cut-off hairs 14 in one direction only.

Figure 4c shows a Haartransportelement 10, without central tooth 26, in which the hair is thrown to the left. FIG. 4d shows a corresponding hair transport element 10, in which the hair is thrown off to the right. The transport toothing 12 in both cases runs obliquely to the base line 16, namely from left to right away from the base line 16, when the hairs are thrown off to the left, as shown in FIG Figure 4c is shown, and from left to right on the Bottom line 16 down to, if, in the case of FIG. 4d hair is thrown off to the right.

An oblique course of the transport teeth 12 relative to the base line 16 corresponds to an oblique course of the transport teeth 12 relative to the cutting edge 18 of the hair clipper. This has the advantage that the hair thrown to the left or right is not repeatedly accelerated to teeth 32 of the transport teeth 12 in the discharge direction and thus ensures a distributed over a wider cross-sectional area hair shedding. In the case of a hair transport to the left, the teeth 32 arranged on the right at the transport toothing 12 are arranged closer to the cutting edge 18 of the hair clipper than the teeth 36 arranged on the left on the transport toothing 12, as in FIG Figure 4c is shown.

When transporting cut hairs 14 to the right, the teeth 32 arranged on the left on the transport teeth 12 are arranged closer to the cutting edge 18 of the hair clipper than the teeth 36 arranged on the right on the transport teeth 12, as seen in FIG FIG. 4d becomes apparent.

FIG. 5 shows a Haartransportelement 10 in a schematic representation with a further formation of the transport teeth 12. The saw teeth 32 are mirror-symmetrical to a central axis 37, which is also referred to as a mirror axis 37 and which passes through the central tooth 26, respectively. The left of the central tooth 26 arranged in a first section 38 sawteeth 32 are directed with their flat edges 36 in the direction of the central axis 37 of the hair clipper 1 and point with their steep flanks 34 to the left, away from the central axis 37. The right of the central tooth 26 arranged in a second section 40 sawteeth 32 are with their flat Flanks 36 directed toward the central axis 37 of the hair clipper 1 and point with their steep flanks 34 to the right, away from the central axis 37. The dashed lines shown envelope 21 limits and outlines the transport teeth 12. The envelope 21 encloses the teeth 26, 32 of the transport teeth 12 convex. In the FIG. 5 The cutting edge 18 of the doctor blade 8 shown in dashed lines runs at a distance from the leading edge 20 of the hair transport element 10 and thus to the first section of the envelope 21.

FIG. 6 shows a concave-convex envelope 21, which encloses the teeth 26, 32 of the transport teeth 12. The first portion of the envelope 21, adjacent to the cutting edge 18 and limits the transport toothing 12 convex so that the tips of the teeth 32, 26 which are arranged more in the middle of the transport teeth 12, have a smaller distance from the cutting edge 18, as the Teeth 26 which are arranged closer to the two edges of the transport teeth 12. This has the advantage that hair sections 14, which have already been moved laterally outwards by a steep flank 34 of a tooth 26, 32, do not undergo a new change of direction due to a flat flank of a tooth 32. This allows, similar to the example in FIG. 5 in which the envelope 21 convexly surrounds the entire transport tooth 12, hair portions 14 are removed from the hair clipper 1 quickly and effectively. The base line 16 of the transport toothing 12, that is to say the second section of the envelope 21, limits the transport toothing 12 concavely in this example.

The invention has been explained with reference to preferred embodiments, without being limited to these examples. Individual features of each illustrated embodiments are also combinable with each other or interchangeable with other, same-acting characteristics, provided compatibility is present. For example, the teeth of the feed teeth may be formed so that the tangential angles of the flat flanks are reduced from the baseline towards the tip of the single tooth until, for example, they have an angle of nearly zero degrees with the baseline. Also such shaped tooth profiles are to be referred to in this document as "sawtooth".

LIST OF REFERENCE NUMBERS

1

Clippers

2

cutting set

4

casing

6

electrical switch

8th

razor

10

Hair transport element

12

Transportzahnung

14

Hair, hairstyles

16

Base line of the transport toothing

18

cutting edge

20

Leading edge of the hair transport element

21

envelope

22

Leading edge of the cutting edge

24

trimmer

26

Tooth, middle tooth

28

drillings

30

intervention

32

Tooth, sawtooth

34

steep flank

36

flat flank

37

central axis

38

first section

40

second subsection

Claims (12)

1. Blade set (2) of a hair clipper (1), comprising

   - a preferably stationary cutting comb (24),

   - a shearing blade (8) which can be driven in oscillation in a transverse direction substantially parallel to the front edge (22) of the cutting comb (24),

   characterised in that the blade set has a hair transport element (10) which has a transport toothing (12) with teeth (26, 32) which are arranged adjacent to one another, and are arranged substantially along the cutting edge of the shearing blade (8) and spaced apart from the cutting edge (18) of the shearing blade (8), wherein the shearing blade (8) is arranged between the cutting comb (24) and the hair transport element (10) and wherein the cutting edge (18) of the shearing blade (8) extends beyond the front edge (20) of the hair transport element (10).
2. Blade set (2) according to claim 1, characterised in that the transport toothing (12) has a substantially sawtooth profile, wherein the sawteeth (32) of the sawtooth profile each have a steep flank (34) and a flat flank (36).
3. Blade set (2) according to one of the preceding claims, characterised in that the transport toothing (12) of the hair transport element (10) is arranged substantially along the entire cutting edge (18) of the shearing blade (8) extending on the hair transport element (10).
4. Blade set (2) according to one of the preceding claims, characterised in that the front edge (20) of the hair transport element (10) is substantially parallel to the cutting edge (18) of the shearing blade (8).
5. Blade set (2) according to one of the preceding claims, characterised in that tips of the teeth (26, 32) of the transport toothing (12) are arranged relative to one other so that they define a first portion of an envelope curve (21) which forms a convex boundary of the transport toothing (12).
6. Blade set (2) according to one of the preceding claims, characterised in that the hair transport element (10) is connected firmly, preferably in a planar manner, to the shearing blade (8), or in that the hair transport element (10) can be driven in oscillation by means of a driver with the shearing blade (8).
7. Blade set (2) according to one of the preceding claims, characterised in that the transport toothing (12) has a first portion (38) and a second portion (40), wherein the steep flanks (34) of the sawteeth (32) of the first portion (38) of the transport toothing (12) and the steep flanks (34) of the sawteeth (32) of the second portion (40) of the transport toothing (12) point in substantially opposite directions to one another.
8. Blade set (2) according to claim 7, characterised in that the first portion (38) of the transport toothing (12), is designed in mirror symmetry to the second portion (40) of the transport toothing (12).
9. Blade set (2) according to one of the preceding claims, characterised in that the transport toothing (12) has a middle tooth (26) with preferably two steep flanks (34).
10. Blade set (2) according to one of the preceding claims, characterised in that the spacing between the front edge (22) of the cutting comb (24) and of the cutting edge (18) of the shearing blade (8), preferably with an actuating element, is adjustable, wherein the relative position of the cutting edge (18) of the shearing blade (8) with respect to the front edge (21) of the hair transport element (10) remains the same when the spacing between the front edge (22) of the cutting comb (24) and the cutting edge (18) of the shearing blade (8) is changed.
11. Hair clipper (1) having

    - a blade set according to one of claims 1 to 10,

    - a housing (4), which encloses an electric motor for driving the shearing blade (8) in oscillation,

    - as well as a driver, which is connected to the electric motor and to the shearing blade (8) so that it drives the shearing blade (8) in oscillation when the electric motor is switched on,

    characterised in that the hair transport element (10) is either firmly connected to the shearing blade (8) or is connected to the shearing blade (8) so that the hair transport element (10) moves with the shearing blade (8) when the shearing blade (8) is driven in oscillation.
12. Hair transport element (10) of a blade set (2) of a hair clipper (1) according to claim 11, having an engagement recess (30) to receive the driver.

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