EP3187314A1 - Device for cutting hair - Google Patents

Abstract

The present invention relates to a hair cutting device for cutting hair of the human head (14), comprising a hair cutting device (12) which has a cutting unit (46) whose position relative to the hair cutting device (12) is variable by means of an adjusting element (44), and a Haareinzugseinrichtung (47) for supplying the hair to be cut to the cutting unit (46), a centering device (34) for centering the human head (14), a control unit (42) with the adjusting element (44) for changing the position the cutting unit (46) cooperates, a holding and guiding device (16), with which the hair trimmer (12) relative to the centering device (34) and the human head (14) is movable, wherein the holding and guiding means (16) position detecting means (16) 40), with which the position of the hair trimmer relative to the centering device (34) and / or the human head (14) can be determined and the Position detection means (40) generate the corresponding position corresponding signals and the control unit (42) supply. Furthermore, the invention relates to a corresponding method.

Description

The present invention relates to a hair cutting device according to the preamble of patent claim 1.

Traditionally, hair, such as the hair of the head or beard, is manually cut. The result of the haircut results from the skill of the individual performing the haircut.

Exactly in this dependency on the person - here and hereinafter called hairdresser - the problems of conventional hair cutting operations result. The results vary according to the skill of the hairdresser. If the hairdresser does not want to make previously known haircuts with other shapes, the result is rather random. In any case, the result is very unpredictable. An important parameter which decides the result is the distribution of cut lengths over the head which the hair has after the hair cutting operation.

The DE 601 32 969 T2 describes a method by means of vacuum. Here, the vacuum in the hair clipper is used to catch the cut hair, here and hereinafter called waste. Other hair cutting devices are in the DE 39 36 367 A1 and the US 4 216 581 A shown.

An object of one embodiment of the present invention is to overcome the above-mentioned problems. In particular, a hair trimmer is to be provided with which reproducible haircuts can be created. In addition, haircuts should be created, which are executed according to a desired design.

This is solved extensively with the features of protection claim 1.

Advantageous embodiments of the invention are specified in the subclaims.

An embodiment of the present invention relates to a hair cutting device for cutting hair of the human head, comprising a hair cutting device comprising a cutting unit whose position relative to the hair cutting device is variable by means of an adjusting element, and a hair pulling device for feeding the hair to be cut to the cutting unit; a centering device for centering the human head, a control unit which cooperates with the adjusting element for changing the position of the cutting unit, a holding and guiding device, with which the hair cutting device is movable relative to the centering device and the human head, wherein the holding and guiding device position detecting means with which the position of the hair trimmer relative to the centering device and / or the human head is determinable and the position detection means of the particular position corresponding signals erze and to the control unit.

An essential core of the invention is that the holding and guiding device not only holds and guides the hair trimmer, but at the same time is also used to determine the position of the hair trimmer. A haircut is essentially determined by the cut length of a hair at a particular position of the human head. On the control unit a number of cut length profiles are deposited, which assign the cutting lengths of the position of the hair on the head to a specific haircut to be able to provide. Consequently, a hairdresser only has to select the desired haircut or the cut length profile assigned to this haircut and move the hair trimmer along the head. The hairs are drawn into the hair trimmer and cut with the cutting unit, wherein the position of the cutting unit is variable with respect to the hair trimmer by means of the adjusting element. The position of the cutting unit determines the cutting length to which the retracted hairs are cut.

The control unit assigns the cutting length of the position at which the hair trimmer is currently located via the selected cutting length profile. For this purpose, the control unit controls the adjusting element so that the hair is cut at the point at which the hair trimmer is currently located, to the cut length predetermined by the cutting length profile. Consequently, regardless of the skill of the hairdresser, a reproducible haircut can be provided. The hair trimmer does not have to be operated by a trained hairdresser, but can also be operated by an unskilled worker.

The present hair cutting device is therefore particularly suitable for manually moving the hair trimmer along the head. This promotes acceptance of the hair clipper as compared to a fully automated hair clipper as found in the US 4 602 542 A is known. Here the control unit specifies the way along which the hair clipper is moved. Position detecting means are therefore in the US 4 602 542 A not mandatory.

In a particular embodiment, the hair trimmers may include CNC controls that describe computer numerical controls. These are well-known in industrial applications and control numerical programs (computer programs) certain path commands in different axes. With at least three existing axes, a spatial contour can be traversed.

Well-known hair cutters vacuum hair. As a result, the waste can be sucked off through the vacuum. The problem of a reproducible haircut is hereby not resolved. This can only be realized by an existing centering device. This centering centered on the basis of physical contours. Using these contours, the CNC program of the hair clipper can repeatedly go to the same position to the body.

According to a preferred embodiment of the invention, a negative image of the human face is used as a centering device. This allows the head, whose hair is to be cut, to be easily inserted into the negative mold. The hair clipper can now run the contour of the computer program.

Advantageously, simple negative images, such as plaster impressions, are used as the centering image. Plaster casts can be made easily, cheaply and quickly.

An advantageous embodiment of the invention is characterized in that the Zentrierabbild is arranged within the centering device as an exchangeable unit. Thus, different centering images can easily be used for different people.

According to one embodiment of the invention, at least one additional centering pin is arranged in the centering device for Zentrierabbild. With this centering pin, a lateral support unit can be added in addition to the negative impression of the face. This results in a better fixation of the human head within the centering.

Advantageously, the centering pin is adjustable and lockable in its position relative to the human head. For example, with a simple thread arrangement, the at least one centering pin can be adjusted in length and pressed against the head.

According to one embodiment of the invention, the Haareinzugseinrichtung provides a vacuum for pulling the hair. This vacuum allows the hair to move in to the cutting unit of the hair clipper.

According to a preferred embodiment, a hood is used, which generates vacuum over the entire head.

In one embodiment of the invention, the vacuum is partially attached to the head area by means of a support unit, wherein a distance to the human head is maintained and the seal is effected by means of the support unit. As a result, the hair to be cut can be specifically sucked and fed to the cutting unit.

Advantageously, the Haareinzugseinrichtung is operated electrically and provides electrical charge for pulling the hair ready. This principle is known from a balloon, which is electrically charged by friction. The human hair is attracted to this balloon.

In a further development of the invention, a plurality of cutting units are arranged on the hair trimmer, which are controlled and adjusted by the controller in such a way that they cut at different head areas at the same time. With these multiple cutting units large head surfaces can be cut at once. The cutting units are controlled by the CNC program so that each cutting unit sits at a desired height and thus adjusts the cut length of the hair.

According to a preferred embodiment of the invention, the hair trimmer is provided with only one cutting unit, which is arranged in a guide. By means of this guide, the cutting unit on the CNC program is moved around the human head, that by means of simultaneous distance adjustment to the top surface, a desired cutting geometry is created.

A development of the invention describes on the leadership joints. By means of these joints arise degrees of freedom for the hair clipper. These degrees of freedom allow the hair trimmer to be moved to any position in the head where it cuts perpendicular to the top surface.

An advantageous embodiment of the invention describes a sensing device within the hair cutting device. With this sensing device, a currently existing hair length can be scanned and stored in relation to the respective position. Hereby it is possible to scan and save a desired hairstyle (different lengths in relation to the position), so that it can be cut later reproducibly.

According to one embodiment of the invention, the Haareinzugseinrichtung consists of at least one movable comb. This comb leads the hair to the cutting unit. This has the advantage that no vacuum must be generated and no problems arise with a seal of this vacuum.

Advantageously, two combs are used, which run against each other by means of a first approximately lateral movement until the stop points in plan view have a desired shape and then by means of a second movement, the caged within this form hair with a distance movement from the human head to the cutting unit. Within this form, therefore, only the desired hair are drawn exactly at this Haareinzugsstelle. By means of a second movement, the two combs are guided in their closed position to the cutting unit. The cutting unit can either be permanently active or only be activated at the appropriate time. In particular, in this embodiment of the invention, it makes sense to activate the cutting unit only when the combs are already performed close to the cutting unit.

In another embodiment, the holding and guiding device is designed as a robot. In this embodiment, the hair-cutting device comprises drive means with which the hair-cutting device can be guided automatically along the head. In this embodiment, no other person is required to operate the hair trimmer.

• Bewegen des Haarschneidegeräts relativ zur Zentriereinrichtung und zum menschlichen Kopf,
• Bestimmen der Position des Haarschneidegeräts relativ zur Zentriereinrichtung und/oder zum menschlichen Kopf und Erzeugen von der bestimmten Position entsprechenden Signalen mittels der Positionserkennungsmittel sowie Zuführen der Signale zur Steuereinheit,
• Zuordnen einer Schnittlänge zu der bestimmten Position mittels eines auf der Steuereinheit hinterlegten Schnittlängenprofils, und
• Verändern der Stellung der Schneideinheit in Bezug auf das Haarschneidegerät durch entsprechendes Ansteuern des Stellelements mittels der Steuereinheit, so dass die Haare mit der zugeordneten Schnittlänge geschnitten werden.

Another aspect of the invention relates to a method of cutting hair of the human head by means of a Hair cutting device according to one of the previous embodiments, comprising the following steps:

• Moving the hair trimmer relative to the centering device and the human head,
• Determining the position of the hair trimmer relative to the centering device and / or the human head and generating signals corresponding to the determined position by means of the position detection means and supplying the signals to the control unit,
• Assigning a cutting length to the determined position by means of a cutting length profile stored on the control unit, and
• Changing the position of the cutting unit with respect to the hair trimmer by appropriate control of the actuating element by means of the control unit, so that the hair are cut with the associated cutting length.

The advantages and technical effects that can be achieved with the proposed method, correspond to those that have been described for the hair clipper. In summary, it should be noted that it is possible to determine the current position of the hair clipper and to control this so that the hair located in this position is cut to the cut length assigned by means of a cut length profile. Consequently, a selectable haircut can be provided reproducibly and independently of the skill of the operator.

Fig. 1

eine perspektivische Darstellung eines Ausführungsbeispiels einer Haarschneidevorrichtung mit einer Halte- und Führungseinrichtung,

Fig. 2

eine prinzipielle Darstellung eines Ausführungsbeispiels der Halte- und Führungseinrichtung,

Fig. 3

eine Seitenschnittansicht eines menschlichen Kopfes und Haarschneidegerät mit einer Vakuum-betriebenen Haareinzugseinrichtung,

Fig. 4

eine Seitenschnittansicht eines menschlichen Kopfes und Haarschneidegerät mit Haareinzugseinrichtung mit Kämmen,

Fig. 5

eine Draufsicht zweier Kämme mit Abstützeinheit,

Fig. 6

eine perspektivische Darstellung einer Zentriereinrichtung, und

Fig. 7

eine Seitenschnittansicht einer Zentriereinrichtung,

The invention will be explained in detail with reference to the following figures. Show it:

Fig. 1

a perspective view of an embodiment of a hair cutting device with a holding and guiding device,

Fig. 2

a schematic representation of an embodiment of the holding and guiding device,

Fig. 3

a side sectional view of a human head and hair clipper with a vacuum powered Haareinzugseinrichtung,

Fig. 4

a side sectional view of a human head and hair trimmer with Haareinzugseinrichtung with combs,

Fig. 5

a top view of two combs with support unit,

Fig. 6

a perspective view of a centering device, and

Fig. 7

a side sectional view of a centering device,

In FIG. 1 an embodiment of a hair cutting device 10 is shown in perspective, which has a hair clipper 12, with which hair of a human head 14 can be cut. The hair cutting device 10 has a holding and guiding device 16, to which the hair clipper 12 is attached. The holding and guiding device 16 is in FIG. 2 again shown separately using a schematic diagram. The holding and guiding device 16 is mounted on a base 18, which can be parked on a table 20, for example. The holding and guiding device 16 comprises a first leg 22, which by means of a first joint 24 about a perpendicular to the plane of the FIG. 2 extending axis of rotation is rotatably mounted in the base 18. This rotational movement is indicated by the arrow P1.

Furthermore, the holding and guiding device 16 has a second leg 26, which by means of a second joint 28 also about a perpendicular to the plane of the drawing FIG. 2 extending axis of rotation is rotatably mounted on the first leg 22. This rotation is indicated by the arrow P2.

The second joint 28 is designed in the example shown, that in addition to a rotation of the second leg 26 to a in the plane of the FIG. 2 extending axis of rotation allows. This rotation is indicated by the arrow P3.

The second leg 26 includes a third joint 30, on which the hair clipper 12 about a perpendicular to the plane of the FIG. 2 extending axis of rotation is rotatably mounted. This rotation is indicated by the arrow P4.

In addition, the second leg 26 is adjustable in its length, for which purpose the second leg 26 has a length adjustment unit 32. The length adjustment unit 32 may comprise, for example, a telescopic rod. The adjustment direction is indicated by the arrow P5.

Referring to the FIG. 1 The hair cutting device 10 further comprises a centering device 34, which is arranged on the table 20 and with which the position of the human head 14 relative to the hair cutting device 10 can be fixed and fixed.

Once the position of the head 14 is fixed and fixed by means of the centering device 34, the hair clipper 12 can be activated. As in FIG. 2 Recognizable, the hair cutting device 10 comprises a first handle 36 and a second handle 38, with which the hairdresser can move the hair clipper 12 relative to the head 14 and the centering device 34. The hair clipper 12 is guided so that it is always aligned normal to the head 14. The holding and guiding device 16 may not shown restoring elements, for example in the form of springs, which bias the legs 22, 26 and the hair clipper 12 in a starting position so as to give the hairdresser some orientation.

The holding and guiding device 16 has position detection means 40, which can be embodied, for example, as angle and / or linear encoders arranged in the joints and / or in the length adjustment unit 32. As a result, the current position of the hair trimmer 12 with respect to the centering device 34 and the human head 14 can be determined. The position detection means 40 generate signals corresponding to the current position of the hair trimmer 12 and feed them to a control unit 42 (see FIG. FIG. 3 ). The control unit 42 interacts with an actuating element 44 with which the position of a cutting unit 46 within the hair-cutting device 12 can be changed.

The hairs to be cut are fed by means of a hair pulling device 47 of the cutting unit 46 and cut. Depending on the position of the cutting unit 46 within the hair trimmer 12, the cutting length of the hair to be cut along the direction indicated by the arrow P6 direction be adjusted. The cut length is the length that has the hair after the hair cutting process.

The Haareinzugseinrichtung 47 is operated with vacuum, but can also provide an electrical charge. The vacuum is chosen so that the hairs to be cut are sucked through an opening 48 and placed so that they are approximately perpendicular to the head 14. The same applies to the case that the Haareinzugseinrichtung 47 provides an electrical charge, in which case the hair are tightened.

Furthermore, the cutting unit 46 comprises a shearing blade 50, which is mounted on the adjusting element 44 by means of a bearing 55. By means of the adjusting element 44, the distance of the shear blade 50 to the human head 14 and consequently the cutting length can be adjusted. The shearing blade 50 rotates in a plane that is substantially parallel to the head 14 at the respective location. The raised hair is thus easily accessible for the shearing blade 50.

Furthermore, the hair trimmer 12 has a support unit 52, which results in a better hold of the hair trimmer 12. Furthermore, this creates a distance D between the head 14 and the opening 48, whereby only the Haareinzug is made possible. Without the distance D, the hair would be pinched and could not be pulled in through the vacuum.

On the control unit 42 cut length profiles are deposited, in which a certain position of the hair on the head 14 is assigned a certain cutting length. Each cut length profile represents a specific haircut for example, the cut length of the hair on the temples of the human head 14 is greater than at the back of the head.

The hairdresser first selects the desired cutting length profile or the desired haircut. Due to the signals generated by the position detecting means 40, the control unit 42 can determine the current position of the hair trimmer 12 with respect to the centering device 34 and the human head 14. About the cutting length profile, the control unit 42, the actuator 44 so that the hair clipper 12 cuts the hair with the predetermined length for the respective cut length. This process is continued until all the hair has been cut to the intended cutting length.

In the illustrated embodiment, holding and guiding device 16 has no drive means, so that all movements are initiated by the hairdresser. But it is also conceivable to provide such drive means, so that the hair can be cut without the involvement of a hairdresser. In this case, the hair cutting device 10 is implemented as a robot.

The FIG. 4 shows a side sectional view through a human head 14 and an embodiment of the hair clipper 12, wherein the Haareinzugseinrichtung 3 in this case is executed with combs 54. The view shows the combs 54 after execution of the first movement. The two combs 54 are first guided against each other in an approximately lateral movement until they are closed so far that the hairs are held within the support unit 52 (cf. FIG. 3 ). After this first movement follows the second movement, which leads the combs 54 to the blade 50 back. The cutting unit 46 in this illustration comprises the shearing blade 50, the bearing 55 for the shearing blade 50 and the adjusting element 44.

The FIG. 5 shows a plan view of two combs 54 with support units 15. These combs 54 are in a hair clipper 12 after FIG. 4 used. The combs 54 are here in the position of FIG. 4 , so after execution of the first movement shown. To set this position, the combs 54 stop points 57.

In the perspective view FIG. 6 an embodiment of a centering device 34 for a hair cutting device 10 is shown. It is a Zentrierabbild 56 and two centering pins 58 shown. The human head 14 is inserted into the centering image 56 provided for this purpose. By means of the centering pin 58 an additional centering is ensured. The centering pins 58 are designed as screws.

In the sectional view after FIG. 7 is a centering device 34 for a hair cutting device 10 after FIG. 1 shown. In this illustration, the negative image 60 of a face shape can be seen in the centering image 56.

LIST OF REFERENCE NUMBERS

10

Clipper

12

Hair clipper

14

head

16

Holding and guiding device

18

base

20

table

22

first leg

24

first joint

26

second leg

28

second joint

30

third joint

32

Längenverstelleinheit

34

centering

36

first handle

38

second handle

40

Position detecting means

42

control unit

44

actuator

46

cutting unit

47

Hair drafting device

48

opening

50

razor

52

support unit

54

Comb

55

storage

56

Zentrierabbild

57

stop point

58

spigot

60

negative image

D

distance

Claims (15)

Hair cutting device for cutting hair of the human head (14), comprising - A hair cutting device (12) having a cutting unit (46) whose position relative to the hair trimmer (12) by means of an adjusting element (44) is variable, and a Haareinzugseinrichtung (47) for supplying the hair to be separated to the cutting unit (46) includes, a centering device (34) for centering the human head (14), a control unit (42) which cooperates with the adjusting element (44) for changing the position of the cutting unit (46), a holding and guiding device (16) with which the hair trimmer (12) is movable relative to the centering device (34) and to the human head (14), - wherein the holding and guiding means (16) position detecting means (40), with which the position of the hair trimmer relative to the centering device (34) and / or the human head (14) can be determined and the position detection means (40) of the specific position corresponding signals generate and the control unit (42) feed. Hair cutting device according to claim 1,
characterized in that a centering image (56) within the centering device (34) is an at least partial negative image (60) of the human facial contour. Hair cutting device according to claim 2,
characterized in that the centering image (56) comprises the negative image (60) of the human facial contour by means of a plaster cast. Hair cutting device according to one of the preceding claims,
characterized in that the Zentrierabbild (56) within the centering device (34) is arranged as an exchangeable unit. Hair cutting device according to one of the preceding claims,
characterized in that in the centering device (34) for Zentrierabbild (56) at least one additional centering pin (58) is arranged. Hair cutting device according to claim 5,
characterized in that the centering pin (58) in its position relative to the human head (14) is adjustable and lockable. Hair cutting device according to one of the preceding claims,
characterized in that the Haareinzugseinrichtung (47) provides a vacuum for pulling the hair. Hair cutting device according to claim 7,
characterized in that as a hair pulling device (47) by means of a hood vacuum over the entire head area is generated. Hair cutting device according to claim 7,
characterized in that by means of a support unit (52) the vacuum is partially applied to the head region, wherein a distance (D) to the human head (14) 5 is maintained and the sealing by means of the support unit (52). Hair cutting device according to one of the preceding claims 1 to 6,
characterized in that the Haareinzugseinrichtung (47) provides electrical charge for pulling the hair. Hair cutting device according to one of the preceding claims,
characterized in that a plurality of cutting units (46) on the hair cutting device (12) are arranged, which are controlled and adjusted by the controller so that they cut at different head areas simultaneously. Hair cutting device according to one of the preceding claims,
characterized in that the Haareinzugseinrichtung (47) consists of at least one movable comb (54), which leads the hair to the cutting unit (46). Hair cutting device according to claim 12,
characterized in that in the hair cutting device (12) two combs (54) by means of a first approximately lateral movement against each other run until the stop points in plan view a desired shape and then by means of a second movement, the hair trapped within this shape with a distance movement from the human head (14) leads to the cutting unit (46). Hair cutting device according to one of the preceding claims,
characterized in that holding and guiding means (16) is formed as a robot. A method of cutting hair of the human head (14) by means of a hair clipper according to any one of the preceding claims, comprising the steps of: Moving the hair trimmer relative to the centering device (34) and the human head (14), Determining the position of the hair trimmer relative to the centering device (34) and / or the human head (14) and generating signals corresponding to the determined position by means of the position detection means (40) and supplying the signals to the control unit (42), Assigning a cutting length to the determined position by means of a cut length profile stored on the control unit (42), and - Changing the position of the cutting unit (46) with respect to the hair clipper (12) by correspondingly driving the adjusting element (44) by means of the control unit (42), so that the hairs are cut with the associated cutting length.

Images