EP0571389A1

EP0571389A1 - Hair-care appliance.

Info

Publication number: EP0571389A1
Application number: EP92900111A
Authority: EP
Inventors: Karl-Heinz Lange; Manfred Mailaender
Original assignee: Braun GmbH
Current assignee: Braun GmbH
Priority date: 1991-02-14
Filing date: 1991-12-05
Publication date: 1993-12-01
Anticipated expiration: 2011-12-05
Also published as: WO1992014378A1; DE4104511C2; ATE139089T1; DE4104511A1; EP0571389B1

Abstract

Described is a curler for a hair-care appliance, the curler having a bearer element (80) fitted with means for mounting several strips (13). The strips (13) can be brought into various positions by means of adjusting means in order to vary the external diameter of the curler. Each strip (13) has a recess (39) extending along the whole of its length, and the sections of an adjacent strip physically interlock with the recess when the strips are in the appropriate position. An additional feature designed to increase the stability of the curler is the fact that the strips (13) are mounted on the bearer element (80) so that they can be moved longitudinally.

Description

Hair care device

The invention relates to the general field of hair care devices, which means devices or additional devices for shaping and drying the user's hair. The group of hair care devices includes, for example, hair dryers, rounders, harmonic air drying hoods, warm air dry brushes, electricity-independent, gas-operated curling irons or curling brushes, and electrically operated curling irons or curling brushes. Additional devices are, for example, attachments for hair dryers and hot-air brushes, such as diffusers, air-flowable additional brushes with different diameters, or curlers, which can be designed to be heated, for example, by means of warm air or by means of a separate standing device.

The invention is based on a winding body for hair care with a carrier element on which means are provided for guiding a plurality of webs arranged about a longitudinal axis of the carrier element, the webs being able to be brought into different positions by means of adjusting means in order to form a body with a different outside diameter.

Such winding bodies are disclosed for example in DE 2529026 AI or US 3583409 A. The electrical steam styling rod of DE 2529026 AI has a hollow cylindrical winding body with a plurality of semicircular tube segments which are rotatably arranged on the outer wall of the heating tube as spreading lamellae. The lamellas should not be designed as short circular arc sections, but should be semicircular in the optimal solution, ie bent by 180 °. However, as a more precise analysis of FIGS. 1 and 2 of this published specification shows, there is a form-fitting contact of adjacent slats in every position. tioning, i.e. not possible with all adjustable diameters of the winding body. Due to a drawing incorrectness, the lamellae of FIG. 2 are considerably shorter than those of FIG. 1, it only gives the impression that the known vetches have a closed shape for each diameter. This winding body is not suitable for use as a brush with hot air. In addition, the known winding body achieves a not particularly good approximation to a circular cross section - for any diameter. This known embodiment has only a low stability with respect to radially acting forces, such as those which occur in practice when rolling up and shaping hair. A deformation of the winding body during use represents a significant impairment of the value in use.

The hair curler of US 3583409 A consists of several circular segments which are connected via lever arms to an axially displaceable carrier element arranged inside. Due to the special arrangement, an axial movement of the carrier element causes a radial movement of the individual segments. Although this arrangement may be appropriate for hair curlers, it is unsuitable for other applications, for example as an air-flow attachment for warm air dry brushes and the like. On the one hand, the actuation of this spreading mechanism requires free access to the inside of the hair curler, on the other hand, the axially displaceable carrier element and the lever arms represent a considerable flow resistance in the case of air-flowed brushes, so that their effectiveness drops. Finally, due to the structural design of this hair curler, there are more or less large slots between the individual segments depending on the set diameter, which are in any case extremely disadvantageous for brushes through which air flows, since the amount of air emerging from the brush through which air flows is essentially unaffected. should be dependent on the set diameter of the winding body. The inner wall of the hair curler of the known US patent can be covered by an elastic layer so that the slits between the individual segments are closed, but this elastic layer poses problems with regard to the different demands due to the high demands on the elasticity at different diameters Durability on. Furthermore, the known hair curler can only be set in two stable positions of different diameters. A continuous or quasi-continuous setting of intermediate positions is not possible.

The invention is based on the object of specifying a winding body which is also suitable for use in warm air devices, for example as a curling brush. The winding body should be structurally simple in large series, in particular made of injection molded parts made of plastic, have sufficient stability even with larger axial dimensions and a shape which is closed for each diameter and approximated to a circular cylinder jacket. This object is achieved by a winding body with the features mentioned in the introduction, in which each web has a recess over its longitudinal extent, with which the sections of an adjacent web are positively connected in each positioning of the webs. This measure advantageously ensures a closed shape of the winding body for each diameter, and sufficient stability is also provided by the positive connection of adjacent webs. Finally, the form-fitting connection of the webs of the winding body provides the prerequisite for the winding body to have an at least approximately circular-cylindrical outer jacket for each diameter due to a corresponding profiling and shaping of the webs. The fact that the webs are accommodated in rotary bearings at both ends of the carrier element ensures a simple, constructive structure of the wobble body. The space between the bearing points is free and therefore does not represent an increase in the flow resistance of the winding body. Because a rotary bearing is designed as a bearing with open bearing pans, at least one pin of the webs on a segment of the carrier element in the form of a segment of a circle and on an annular wall of the Positioning means is stored, the possibility is created in an extremely advantageous manner to hold the winding body together only by means of snap connections. The measure of arranging an axis of rotation of the individual webs in the region of an end section of a respective web has the advantage that the webs can additionally be supported on the carrier element. The embodiment that the axis of rotation is arranged radially offset outside the profile of the web is extremely advantageous. In this way, the prerequisite is created that, in the event of the webs being bristled, the bristles for each diameter of the winding body project as far as possible radially from the winding body. The fact that each web has a pin in the region of a central section, which engages in each case a guide curve of the adjusting means, which in turn is fixed rotatably on the carrier element, makes it extremely easy to adjust the webs for setting different diameters of the winding body worried. A particularly advantageous embodiment of the known winding body, which is already suitable in itself for solving the stability problems of known winding bodies, consists in that each web is axially displaceable by a dimension A with respect to the longitudinal axis of the carrier element. This makes it possible to support each web by means of additional measures with regard to forces acting radially from the outside on the winding former. To set a different diameter of the winding body, the individual webs are moved axially from a radial direction acting positive connection solved to be pivoted into a position of a different diameter. After the swiveling process has ended, the webs are returned to the axial starting position and again held in a form-fitting manner by means for radial support. A particularly advantageous embodiment of these means for radially supporting the webs consists in axially fixing the webs to the actuating means via latching means. According to an advantageous development, the webs are rotated by means of axial displacement and subsequent rotation of the actuating means. Because the adjusting means are provided on one end on the carrier element and support means for radially fixing the webs on the other end on the carrier element, the webs are positively fixed at both ends in the radial direction for each diameter of the winding body, which increases the stability of the winding body in an extremely advantageous manner. A particularly advantageous embodiment of the support means consists in providing a toothing arranged in the radial direction on each web, which toothing engages in an edge of a tube region. In an extremely advantageous manner, each web consists of three longitudinal strips arranged essentially in an arc shape with respect to one another, which are connected to one another by transverse webs. In this way, on the one hand, the possibility of a specific profile of the webs is created, which allows the winding body to have an essentially circular-cylindrical outer jacket for each diameter. On the other hand, there is the possibility of air outlet between the crosspieces, so that the winding former can also be used as a hot air brush as an attachment for a warm air generator. This application is advantageously supported in that the carrier element has a tubular section with peripheral openings which cooperate with openings formed between the transverse webs for the purpose of air outlet. Because the crosspieces are provided with bristle-shaped extensions, there is the possibility of can also be used as a brush. Characterized in that an outer side of a longitudinal bar of a web has an arcuate recess in such a way that in each radial positioning of the webs an edge, in particular a front edge of the longitudinal bar of an immediately adjacent web has positive locking to the recess, there are two advantages. On the one hand, each web is supported on an adjacent web over the entire longitudinal extent, which leads to an unexpectedly high stability of the entire winding body. On the other hand, this measure prevents warm air, which may flow through the winding body, from flowing out to a greater extent through gaps which otherwise occur between the webs when the winding body is larger in diameter. The warm air flowing through the winding body can escape for each diameter of the winding body only through the openings, which may be provided between the transverse webs. This measure already largely ensures that the flow resistance of a rocking body designed as a hot air brush remains approximately constant for each diameter. The underside of one longitudinal bar advantageously has an adaptation to the profile of the top of the further longitudinal bar. This ensures that adjacent webs can lie flush against one another in the case of setting the small or the smallest diameter of the winding body. With regard to stability, it is advantageous that a longitudinal edge of the further longitudinal strip is supported on the outer jacket of the tubular section in every positioning of the webs. This is due to the fact that at least six webs are supported on the support element and lie one on top of the other in the manner of a calyx, the longitudinal strips of adjacent webs as well as the openings in the tubular section and in the region of the crossbars of adjacent webs one above the other in the position of the smallest diameter Cover, a particularly favorable design of the winding body is specified with regard to use as a hot air brush. Is the If the smallest possible diameter of the winding body is set, the air flowing into the tubular section can emerge unhindered through the openings provided there and through the superimposed webs, the openings of which come to coincide with the openings in the tubular section. The flow resistance is minimal for the smallest diameter of the winding body. With increasing diameter of the winding body, the longitudinal strips slide more and more in front of the openings in the tubular section, so that the flow resistance for the warm air emerging from the winding body increases to a certain extent. This measure ensures in an extremely advantageous manner that the air throughput through the winding body is essentially unaffected by the respectively set diameter of the winding body. The drying capacity of a hot air device for hair care equipped with such a winding body is thus largely independent of the diameter of the winding body set in each case and, if available, can be precisely controlled with the switching means provided on the device for varying the speed of a fan motor and for varying the Power of an electric or gas-operated heater can be set. With regard to the simple adjustability of the diameter of the winding body, it is advantageous that the adjusting means has two-dimensional guide curves that run in a plane perpendicular to the central longitudinal axis.

The measure proving to be extremely advantageous in the case of a winding body with the known features is to accommodate the webs on both ends of the support element in thrust guides. As a result, a structurally particularly simply constructed, extremely stable winding body is specified. In particular, the design of the carrier element and the injection molding tools required for its production are simplified. The thrust guides are advantageously designed as chambers in which sections of the Bridges are positively guided. It is particularly advantageous to solve the problem of stabilizing the webs over their entire length is the fact that the webs are guided at an acute angle, in particular at an angle between 10 ° and 80 °, preferably at one angle! of approximately 45 ° with respect to the longitudinal central axis. Thus, when a changed diameter of the winding body is set, the webs are moved not only in the radial direction with respect to the central longitudinal axis of the carrier element, but also in the axial direction. The webs are guided at least in sections on an inclined plane, which serves as an abutment with regard to radially acting external loads when the winding body is used. For this purpose, inclined surfaces or bottoms are formed on both ends of the support element, on which guide surfaces of the webs are supported with corresponding bevels. The individual webs can also be supported extremely advantageously in that additional oblique surfaces are formed on the tubular section of the carrier element, which correspond to correspondingly shaped guide surfaces of the webs. Depending on requirements and intended use, one or more such inclined surfaces can be formed on the tubular section, which serve for additional support of the webs in each positioning of the webs of the winding body. This measure creates a particularly stable winding body, yet the interior of the winding body is free of further components, so that, for example, air or warm air can flow freely into the winding body. Because the center! has three-dimensional guide curves which spiral in a plane perpendicular to the central longitudinal axis and increase helically with respect to the longitudinal central axis in the axial direction, a particularly advantageous embodiment of the guide curves of the actuating means is specified. Since the pitch of the helical line and the pitch of the spiral are matched to the inclined guidance of the bars, the individual bars can be extremely safely bring it into the desired position practically without any significant effort. The fact that the actuating means has a frustoconical recess on the guide curve side, which is rotatably supported flatly on webs of corresponding incline on the carrier element, indicates a particularly advantageous mounting of the actuating means on the carrier element. The formation of pegs at one end of the webs has proven to be extremely advantageous and already suitable for the known winding bodies, the pegs each engaging in a guide curve of the actuating means, so that the webs as a result of the actuation of the actuating means in both radial and axial directions Direction with respect to the longitudinal central axis are positively guided. Due to the mobility of the webs in the axial direction, they can be supported or secured on inclined planes or similar means for any diameter of the winding body with regard to radial, external stress. Furthermore, it is advantageous that at the other end of the webs an angular nose is formed in the region of the guide surface, which is overlapped by a section, so that the webs are guided in a form-fitting manner in a channel. On the one hand, this ensures easy mounting of the webs on the carrier element, and on the other hand the webs are thus also positively guided on the side facing away from the actuating means. The fact that each web consists of two longitudinal strips, which are connected to one another by transverse webs, advantageously ensures that the webs form a closed jacket of approximately circular cylindrical shape for each diameter of the winding body. Through these openings provided between the crosspieces, warm air entering the winding body can also exit from the latter. For this purpose, the support element or a tubular section of the same is advantageously provided with peripheral openings which cooperate with openings formed between the transverse webs. The fact that the transverse webs have bristle-shaped extensions means that the winding body can be used as a brush or warm air brush with variable diameter guaranteed. The measure of providing a longitudinal edge of the web with a groove-shaped recess, in which at least portions of a further longitudinal ledge of an adjacent web engage in a form-fitting manner in each radial positioning of the webs, has proven to be particularly advantageous. On the one hand, this increases the stability of the entire cradle body, since each web is supported on or in or on an adjacent web, and on the other hand prevents air or warm air introduced into the winding body between the individual webs by any gaps can kick. Thus, the hot air can only flow out through the openings provided between the transverse webs of the individual webs, so that the air throughput through the winding body to which hot air is applied remains essentially constant irrespective of the respectively set diameter. The fact that an edge region of the longitudinal strips has comb-like openings which correspond to the openings between the transverse webs of adjacent longitudinal strips means that even with the smallest set diameter of the winding body, in which the longitudinal strips of one web pass into the area of the transverse webs of an adjacent one Protrude webs, the flow resistance does not increase and thus the air flow rate does not change. A particularly advantageous embodiment, which is characterized by its simple construction, consists in that the longitudinal bar has at least one axial section in a groove-shaped recess, the bottom of which forms an inclined plane, and is form-fitting on a corresponding inclined plane or inclined surface Bridge is supported on the support element. Thus, the individual webs can also be advantageously guided and supported on the carrier element outside the end sections. The fact that the actuating means is secured by means of a cap and spring arms integrally formed thereon by clipping, results in a particularly simple assembly of the winding body. It is also an advantage to have a central recess to arrange a cap for the cap, which causes the expansion of a spring element which engages in an annular groove of a mushroom-shaped area of the supporting body. This measure provides a simple, releasable coupling between the winding body and the support body. The winding body can thus be easily removed from the carrier body, for example for the purpose of cleaning or for exchange with another winding body, by simply pressing the button. This winding body with a variably adjustable diameter is advantageously used as a hair curler, attachment brush of a warm air hair care device or hair treatment section of an electrically or gas-operated hair curler.

Further advantages of the invention result from the following description of the exemplary embodiments and the figures. Show it:

1 shows a conventional, well-known warm air hair care device, type AS 13, manufacturer Braun AG,

2 shows a longitudinal section through the head of the winding body of a first embodiment,

3 is a continuation of the section according to FIG. 2 through the foot of the winding body,

4 shows a longitudinal section corresponding to FIG. 2, but rotated by approximately 90 °,

5 shows a cross section through the head of the winding body according to VV of FIG. 4, the actuating means being shown partly broken away, 6 shows a longitudinal section through the foot of the winding body, rotated by 30 ° with respect to the section of FIG. 3,

7 shows a cross section through the winding body of the first exemplary embodiment with the smallest adjustable diameter,

8 shows a cross section through the winding body according to FIG. 7 with the largest adjustable diameter,

9 shows a longitudinal section through the head of the winding body according to a second exemplary embodiment,

10 is a continuation of the section according to FIG. 9 through the foot of the winding body,

11 is a cross section according to XI-XI of FIG. 10,

12 shows a cross section through the winding body of the second embodiment according to XII-XII of FIG. 10, two webs each being shown in the position of the smallest and largest diameter,

13 is a plan view of the head end of the carrier element with the stel removed,

14 shows a cross section through a single web according to the section XIV-XIV of FIG. 10

15 shows a plan view of the actuating means with three-dimensional guide curves. 1 shows a known warm air-operated hair care device, for which the winding body described below is advantageously used as an attachment. However, the application is not limited to warm air powered hair care devices, but extends to any winding body for hair care. The warm air device has two housing parts 62, which house a motor 66 and a heater 64 for generating warm air, the electrically operated units can be connected to the power supply via a mains cable 68. The connection of the mains cable 68 to the housing is made rotatable via contacts 74. A voltage selector 78 allows the device to be used on power supply networks with different voltages. A switch 82 provided in the housing can be actuated by means of a switch slide 84 so that the device can be handled in various operating states. The housing parts 62 comprise a cylindrical extension of a mandrel 10 which projects out of the housing on the head side. A coupling ring 72, which is under the tension of a compression spring 76, is arranged at the foot of the mandrel. The mandrel 10 serves for the rotatable mounting of a brush 85 which is axially secured on the mandrel 10 by means of a button 50. In the switched-on state, the motor 66 drives a fan wheel (not shown), so that an air flow arises which can be heated by the heater 64. At the base of the mandrel 10, this air flow exits through openings provided there and flows through the brush 85. This air flow exits through openings provided on the circumference of the brush 85 and comes into contact with the hair rolled or wound on the brush 85 to shape and dry it. The brush 85 can be unlocked by means of the coupling ring 72 and can be freely rotated on the mandrel 10 for easier handling. For the purpose of removing the brush 85, the button 50 can be removed by rotation. Thus, the brush 85 can be cleaned if necessary or exchanged for a further brush 85 of a different diameter to form smaller or larger curls. FIGS. 2 to 8 show a first exemplary embodiment of a winding body with a variable diameter in different views. The winding body is placed on the mandrel 10 of the warm air care device and fixed to a mushroom-shaped area 52 of the mandrel 10 by means of an expansion spring 53. This spreading spring 53 can be opened by bevels 40 formed on the button 50 so that the winding body can be removed from the mandrel 10. The button 50 is axially displaceably mounted in a cap 30. The bevels 40 of the button 50 end in two guide webs 60, which are guided in grooves 70 (FIG. 5) of a carrier element 80. This construction of the locking means that the brush 85 is axially secured and can rotate freely on the mandrel 10 if it is not fixed radially by a coupling ring 72 (FIG. 1). The winding body consists of the carrier element 80, on the head side of which a flange 17 is formed. The flange 17 serves for the rotatable mounting of the webs 13, which are optionally provided with molded bristles 16. As can be seen in particular from FIG. 5, the mounting of the webs 13 is formed by integrally formed pins 18, 19 which cooperate with regions 21 on the flange 17 which are shaped like a circular segment. This storage is completed by lugs 26 integrally formed on the pin 18, which cooperate with a groove 27 encircling a pot-shaped inner wall of the adjusting means 23 designed as an adjusting ring. A multi-wedge profile 22 (FIGS. 2, 3) is attached above the flange 17 and interacts with a corresponding profile on the actuating means 23. The actuating means 23 has on its side facing the webs 13 corresponding to their number of guide curves 24, in which the webs 13 are guided via pins 25 (FIG. 4) or steering arms formed on the end. The pins 18, 19 of the webs 13 are increased by the dimension A compared to the circular segment-shaped regions 21 of the flange 17. By the interaction of the nose 26 and the groove 27, the webs 13 are positively connected in the axial direction to the actuating means 23 and can together with this the dimension A can be moved in the axial direction. If the actuating means 23 is displaced against the action of a spring 28, the profile 22 is uncoupled. The actuating means 23 can now be rotated, provided that the guide curves 24 with respect to the pins permit this.

In a tubular section 14 of the carrier element 80, a plurality of openings 15 are provided on the circumferential side, from which hot air can possibly escape. Overall, the winding body is arranged concentrically with a central longitudinal axis 112 of the mandrel 10. According to FIG. 3, the winding body is surrounded by a tubular region 49 at the end facing the housing part 62. At the end of the tubular region 49 facing away from the winding body, the latter has an end toothing 42 which interacts with a corresponding toothing on the housing and serves to secure the winding body against rotation (corresponding to the coupling ring 72). The tubular area 49 is used, if necessary, for the air flow of the warm air flow into the winding body and for the positioning of the webs 13 at the end facing away from the open bearing pans (pins 18, 19, area 21). For this purpose, integrally formed, torpedo-shaped bearings 12 for the webs 13 are connected to the tubular region 49 via webs 11. The journal bearings 12 merge in one piece with the central longitudinal axis 112 into the tubular section 14, which extends into the head region of the winding body. The torpedo-shaped bearings 12 take up pins 46 of the webs 13, the pins 46 being integrally formed on small steering arms of the webs 13. To vary the diameter of the winding body, the adjusting means 23 is displaced against the action of the spring 28, so that the profile 22 decouples. The adjusting ring 23 can be rotated insofar as this is permitted by the guide curves 24 relative to the pin 25. The division of the profile 22 is chosen so that there are several re-entry possibilities for the profile 22 within the said range of rotation are. In this way, the desired different winding body diameters can be determined. The Axialverschiebbar¬ speed of the webs 13 and the actuating means 23 allows that the webs 13 on the side facing away from the actuating means 23 can also be supported against radial stress. This is accomplished with the aid of a toothing 29 (FIGS. 3, 6) which is integrally formed on the side of the first device-side bristle 16 or on the web 13. This toothing 29 is matched to the division of the profile 22 and, in the case of the respectively adjustable winding body diameters, engages in an upper edge 48 of the tube region 49. As a result of this measure, the webs 13 are supported against radial, external loads in each setting of the diameter of the winding body at both ends of the winding body and achieve good stability. 4, which shows a cutting plane rotated by approximately 90 ° in relation to FIG. 2, the same parts are identified with the same reference numbers. In particular, it can be seen from this figure that the spring 28 is supported in the inner bottom of the cap 30, the cap 30 snapping into corresponding openings in the carrier element 80 with the aid of molded-on spring arms 31.

The mounting of the webs 13 in the head-side region of the winding body is further illustrated by the illustration in FIG. 5, in the right part of which the adjusting means 23 is not shown. The open pan bearing, which is particularly suitable for plug-in mounting of the webs 13, is formed by the pins 18 and 19 formed on the strips and the region 21 in the form of a segment of a circle on the flange 17. The pins 18 and 19 are given additional guidance in that they rest on the annular inner wall of a pot-shaped recess in the adjusting means 23 or in a groove 27 provided there. The pins 25 are guided in the guide curves 24 (left side of FIG. 5), so that rotation of the adjusting means 23 also causes the webs 13 to rotate 7 and 8 apparent axis of rotation 20 leads. 6, the interaction of the toothing 29 with the edge 48 of the tube region 49 is explained in a longitudinal section through the base of the brush. When a changed diameter of the winding body is set, the webs 13 are displaced by a dimension A, which corresponds approximately to the tooth depth of the toothing 29, in the direction of the head end of the winding body. The toothing 29 then no longer engages in the edge 48, so that the webs 13 can be freely rotated about the axis of rotation 20 due to the rotary movement of the adjusting means 23. After the rotary movement has ended, the webs 13 are pushed back axially due to the action of the spring 28, another toothing 29 engaging in the edge 48. The tooth pitch of the toothing 29 is matched to the profile 22 on the carrier element 80 or on the adjusting means 23. Thus, each web 13 is positively fixed at the foot end of the winding body and is secured against connections due to radial stresses.

FIGS. 7, 8 show the cross-sectional profile of the individual webs 13 and the arrangement of these webs 13 with respect to the carrier element 80. The webs 13 consist of a first longitudinal bar 32 which is connected to a second longitudinal bar 34 via numerous transverse webs 33. Air outlet openings are provided between the crosspieces 33, which correspond to the openings 15 provided on the tubular section 14 of the carrier element 80. The underside 35 of the second longitudinal bar 34 has a shape such that, with the smallest adjustable diameter of the winding body, this underside 35 bears positively on the top of the first longitudinal bar 32. The outer side 36 is curved, so that there is an in particular convex recess 39 over the entire extent of the second longitudinal bar. This second longitudinal bar 34 is followed by further transverse webs 51, which can be provided with bristles 16 in part or in total. These crossbars 51 produce the connection with the second longitudinal bar 34 with a third longitudinal bar 37, openings being preferably provided between the transverse webs 51, which correspond to the openings between the transverse webs 33 and the openings 15. The longitudinal bars 32, 34 and 37 are arranged at an obtuse angle to one another, so that each individual web 13, consisting of the longitudinal strips 32, 34 and 37 and the transverse webs 33 and 51 provided between them, takes on an approximately circular shape. The shape of the recess 39 is particularly advantageously designed in such a way that a front edge 38 of the longitudinal bar 37 for each diameter of the winding body bears positively on the outside 36 of the recess 39. The fact that the axis of rotation 20 of the webs 13 is offset somewhat radially outwards outside the longitudinal bar 32 means, on the one hand, that the webs 13 are in each rotational position with the longitudinal edge 41 of the longitudinal bar 32 constantly on the tubular section 14 ¬ support. On the other hand, this measure of positioning the axis of rotation 20 outside the profile of the webs 13 ensures that the bristles 16 are aligned at least approximately radially with respect to the central longitudinal axis 112 in each rotational position of the webs. In summary, the profiling of the webs 13 can be characterized in that each web 13 is shaped in such a way that, regardless of the respective rotational position of the webs 13, on the one hand positive locking between the longitudinal bar 32 and the tubular section 14 and on the other hand positive locking between a front edge 38 the longitudinal bar 37 and the outside 36 of the recess 39 of an adjacent web 13. This provides a very stable winding body which is extremely resistant to radial loads. A further criterion for the design of the recesses 39 is that, in the case of the smallest set diameter of the winding body, the longitudinal bar 37 of an adjacent web 13 practically completely accommodates it, in such a way that the outer jacket of the Winding body, apart from the bristles 16, takes on a practically circular shape. The openings between the crosspieces 33 and 51 practically coincide with the openings 15 in the tubular section 14 of the carrier element 80 in the case of the smallest set diameter of the winding body, so that in this setting the lowest flow resistance for from the inside of the tubular section 14 through which hot air flows out through the openings. If the diameter of the winding body is increased by rotation of the adjusting means 23, the longitudinal bar 32 is partially pushed between the openings 15 of the tubular section 14 and the opening between the transverse webs 51. As practical tests have shown, this measure surprisingly ensures this that the air throughput through the openings of the winding body is almost independent of the respectively set diameter of the winding body. A presumed explanation is that an increase in the diameter of the winding body in itself leads to a lower flow resistance, but this increases by the partial immersion of the longitudinal bar 32 in the outlet area of the warm air back to the original value with the smallest diameter becomes. The longitudinal bar 37 also acts in a similar manner and, when the diameter is increased, is partially pushed in front of the opening between the transverse webs 33. The outer jacket of the winding body also takes on an approximately circular shape for the largest adjustable diameter, provided that the indentations in the area of the cutouts 39 are disregarded. With regard to the definition of the axis of rotation 20, it should also be noted that it is fixed for an average diameter of the winding body in such a way that the connecting line between the axis of rotation 20 and the central longitudinal axis 112 forms an approximately right angle to the bristle axis 122. In this case, the bristles 16 protrude largely radially from the brush 85, regardless of the respective diameter of the winding body. Overall, this construction of the winding body creates an extremely stable, resilient structure, the diameter of which can be varied. The length of the bristles 16 and their radial position with respect to the central longitudinal axis 112 of the winding body are largely independent of the setting of the respective diameter of the winding body. In the case of using the washing body as a brush through which hot air flows, the air throughput and thus the temperature are essentially independent of the respectively set diameter. The individual webs 13, which overlap each other in each rotational position, are mounted parallel to the central longitudinal axis 112 and, for the different diameters, form essentially lateral surfaces of circular shape, so that the deviation from the ideal circular shape is minimized. The entire winding body is structurally designed in such a way that it can only be assembled via snap connections and that the individual parts can be produced in large series by injection molding.

FIGS. 9 to 15 show a further exemplary embodiment of the winding former according to the invention, parts comparable to the first exemplary embodiment being provided with identical reference numerals. Only the differences from the first exemplary embodiment are explained in more detail below. In a departure from the two-dimensional guide curves 24 of the actuating means 23 according to the first exemplary embodiment, the actuating means 23 (FIGS. 9, 15) in the present case has three-dimensional guide curves 24. The guide curves 24 run on the one hand spirally in a plane perpendicular to the central longitudinal axis 112. In particular, the guide curves 24 take the form of Archimedean spirals. In addition, the guide curves 24 or their bottom surfaces 56 have a helical course in the axial direction (central longitudinal axis 112). In the present exemplary embodiment, the gradient of the guide curves 24 in the radial and axial directions is the same. has been elected. However, it is equally possible to provide different gradients in the radial and axial directions, the guides of the webs 13 having to be adapted accordingly. A pin 25 molded onto the webs 13 is guided in the guide curve 24 on a path which runs on a conical jacket which is concentric with the central longitudinal axis 112 and whose surface line forms an angle of in particular 45 ° with the central longitudinal axis 112. Guide surfaces 95, 96 and 97 formed on the webs 13 also have the same angle to the central longitudinal axis 112. These guide surfaces 95, 96 and 97 on each web 13 act together with corresponding inclined surfaces 98, 99 and a bottom 94, which in turn are molded onto the carrier element 80. These inclined surfaces 98, 99 or the bottom 94 likewise form an angle of approximately 45 ° with respect to the central longitudinal axis 112. To adjust the diameter of the winding body, the adjusting means 23 is rotated, which can be locked in different positions by means of a locking ball 54 is. "Due to the engagement of the pins 25 of the webs 13 in the guide curves 24, the webs 13 are driven, specifically on a path which in the present special case encloses an angle of 45" with the central longitudinal axis 112. According to the present exemplary embodiment, everyone becomes Web 13 is supported in three areas, namely the two end areas and in the middle area against forces acting radially from the outside on the winding body. Depending on the design of the winding body and the intended use, the middle support section may be omitted or supplemented by further support sections the.

The adjusting means 23 has a frustoconical, central recess 114, in the inner surface of which the guide curves 24 are introduced. The outer surface of the recess 114 interacts with webs 110 which are molded onto the carrier element 80. These webs 110 have one of the slopes of the conical surface of the Recess 114 corresponding slope and serve on the one hand for supporting and rotatable mounting of the adjusting means 23, on the other hand, the webs 110 form pairs 92 in which the webs 13 or parts of the molded pin 25 in the radial direction, such as from Fig 13 can be seen. If the diameter of the winding body is made larger, the individual webs 13 are driven in the radial and axial directions and move on a path which forms an angle of approximately 45 ° with respect to the central longitudinal axis 112. The angle of 45 "can of course also be varied in a range between 10 and 80 ° according to the individual requirements. If a smaller diameter of the winding body is set, the guide curves 24 act radially inwards on the pins 25 The force acting on the central longitudinal axis 112 is such that the webs 13 with the corresponding guide surfaces 95, 96 and 97 slide angularly inward and thus also follow the bottom surface 56 of the guide curves 24. The webs 13 are supported in the central section of the carrier element 80 or its tubular section 14 can be seen in particular from Fig. 12. Beneath guide surfaces 96 which are attached to each web 13 in this section and extend at an angle to the central longitudinal axis 112, an inclined surface 99 is formed on the tubular section 14, on which the web 13 changes when the diameter of the winding body changes how to slide down or slide up on an inclined plane This inclined plane provides for each diameter of the winding body to support the webs 13 in the central region with regard to forces acting on the webs 13 from the outside for each set diameter of the winding body. At the base of the winding body, the carrier element 80, as can be seen in particular from FIGS. 10, 11 and 12, has six slit-like chambers 90, the bottom 94 of which likewise runs at the preferred angle of approximately 45 ° to the central longitudinal axis 112. Each chamber 90 is formed by two side walls 44 formed on the carrier element 80. The Crosspieces 13 have end sections which are provided with guide surfaces 97 which are guided in the chambers 90. In order to force-feed the webs 13 in the radial direction, the ends of the webs 13 have noses 86 (see FIG. 11) which protrude at an angle in the region of the guide surface 97 and are gripped by a section 88 on the tubular region 49. As a result of this measure, a channel 116 is formed between the bottom 94 of the carrier element 80 and the section 88 of the tube region 49, in which the nose 86 of the webs 13 is guided in a form-fitting manner on an approximately 45 "inclined path. As can be seen from FIG. 12 is secured by small angled pins 58 of the tube area 49 on the support element 80 by the pins 58 interacting with grooves 59. This measure ensures extremely simple assembly of the webs 13 on the support element 80.

The individual webs 13 have the profiling shown in FIGS. 12 and 14. A first longitudinal bar 102 is connected to a second longitudinal bar 106 via transverse webs 118, which can optionally be provided with bristles 16. Openings are provided in the web 13 between the transverse webs 118, which correspond to corresponding openings 15 in the tubular section 14, so that, for example, warm air can emerge from the winding body. The longitudinal bar 106 has an approximately arrow-shaped shape, the arrowhead being connected to the transverse webs 118. On the edge side, the longitudinal bar 106 is provided with slots 108, so that the edge region takes on an approximately comb-like shape. The longitudinal bar 106 is guided in a form-fitting manner in a recess 104 in the longitudinal bar 102 of a web 13 which is directly adjacent and is designed as a longitudinal groove. As can be seen in particular from FIG. 12, the longitudinal bar 106 plunges deeply into the longitudinal groove 104 of the longitudinal bar 102 when the smallest diameter of the winding body is set and partially projects into the openings between the transverse webs 118. The slots 108 are now Arranged on the longitudinal bar 106 such that they essentially correspond to the openings between the transverse webs 118 and thus there is no noticeable increase in the flow resistance for small diameters of the winding body. If the diameter of the winding body is increased by rotating the adjusting means 23, the longitudinal bar 106 slides out of the recess 104 of the longitudinal bar 102 of an adjacent web 13 for the most part. Irrespective of the set diameter, there is therefore a form fit between adjacent webs in each positioning of the webs 13, so that this exemplary embodiment of the winding former according to the invention also has a high stability against radial stresses. In addition, the webs 13 are guided at least on both ends on inclined planes, which is made possible by the axially displaceability of the webs in connection with the three-dimensional guide curve 24 of the adjusting means 23. To improve the stability, one or more inclined planes can be provided in the central region of the webs on the tubular section 14, as required. As can be seen in particular from FIG. 12, this winding body also has a circumferential surface which is essentially circular for all winding diameters. Only for larger diameters of the winding body are formed between adjacent webs 13 longitudinal groove-like depressions with a depth that corresponds to about a third of the thickness of the web 102. In addition to the extremely good stability, this winding body is characterized by its simple manufacture and is also well suited for use as a hot air brush. According to FIG. 12, the bristle axes 122 of the optionally provided bristles 16 have a slight deviation from the exact radial alignment, but this deviation of a few degrees is negligible for the practical use of such a winding body. Both embodiments of the winding body according to the invention have their own advantages, but in the event that the stability aspect of the winding body is in the foreground, the second embodiment is to be preferred, since it is possible here without further, as many support surfaces as required in the middle region to provide the webs 13.

Claims

1. winding body for hair care with a carrier element (80), on which means for guiding a plurality of webs (13) arranged around a central longitudinal axis (112) of the carrier element (80) are provided, the webs (13) using adjusting means (23 ) can be brought into different positions to form a body with different outer diameters, since _. - characterized in that each web (13) has a recess (39, 104) over its longitudinal extent with which the sections of an adjacent web (13) are positively connected in each positioning of the webs.

2. winding body according to claim 1, characterized in that the webs (13) on both ends of the carrier element (80) in Dreh¬ bearings (18, 19, 21; 12, 46) are received.

3. Wickelkδrper according to claim 2, characterized in that a pivot bearing is designed as a bearing with open bearing pans, at least one pin (18, 19) of the webs (13) on a circular segment-shaped section of the carrier element (80) and on an annular wall of the adjusting means (23) is stored.

4. Wickelkδrper according to any one of the preceding claims, characterized in that an axis of rotation (20) of the web (13) is arranged in the region of an end portion of the web (13).

5. Wickelkδrper according to claim 4, characterized in that the axis of rotation (20) is arranged radially offset outside the profile of the web (13).

6. winding body according to claim 1 or 2, characterized in that each web (13) in the region of a central portion (34) has a pin (25) on the edge, which engages in a guide curve (24) of the adjusting means (23), which is in turn rotatably attached to the carrier element (80).

7. winding body according to the preamble of claim 1 or according to claim 1 or 2, characterized in that each web (13) with respect to the longitudinal axis of the carrier element (80) is axially displaceably mounted by a dimension (A).

8. winding body according to claim 7, characterized in that the web (13) via locking means (26, 27) on the adjusting means (23) is fixed in the axial direction.

9. Winding body according to one of the preceding claims, characterized in that rotation of the webs (13) can be carried out by means of an axial displacement and subsequent rotation of the adjusting means (23).

10. winding body according to one of claims 7 to 9, characterized in that the adjusting means are provided at one end on the support element (80) and support means (29, 48) for radially fixing the webs (13) at the other end on the support element (80).

11. A winding body according to claim 10, characterized in that the supporting means (29, 48) are formed by ^' on the web (13) extending in the radial direction toothing (29) which engage in an edge (48) of a tubular region (49) .

12. winding body according to claim 1, characterized in that each web (13) consists of three substantially arcuate zuei¬ arranged longitudinal strips (32, 34, 37) which are interconnected by transverse webs (33, 51).

13. Wckel body according to claim 12, characterized in that the carrier element (80) has a tubular portion (14) with peripheral openings (15) which cooperate with openings formed between the transverse webs (33, 51) for the purpose of air outlet.

14. Wickelkδrper according to claim 12 or 13, characterized gekennzeich¬ net that the transverse webs (51) are provided with bristle-shaped extensions.

15. Wickelkδrper according to any one of the preceding claims, characterized in that an outer side (36) of a longitudinal bar (34) of a web (13) has an arcuate recess (39) such that in each radial position of the webs (13th ) an edge, in particular a front edge (38) of the longitudinal bar (37) of a directly adjacent web (13) has a positive connection to the recess (39).

16. Wickelkδrper according to any one of claims 12 to 15, characterized in that the underside (35) of a longitudinal bar (34) in the profile of the top of the further longitudinal bar (32) is adapted.

17. Winding body according to one of claims 12 to 16, characterized in that a longitudinal edge (41) of the longitudinal strip (32) is supported on the outer jacket of the tubular section (14) in each positioning of the webs (13).

18. Wickelkδrper according to any one of the preceding claims, characterized in that on the carrier element (80) at least six webs (13) are mounted, the flower cup-like on top of each other!, In the position of the smallest diameter The longitudinal strips (32, 34, 37) of adjacent webs (13) as well as the openings (15) in the tubular section (14) and in the region of the transverse webs (33, 51) of adjacent webs (13) overlapping one another come to cover.

19. Winding body according to one of the preceding claims, characterized in that with increasing diameter of the winding body, longitudinal strips (32, 34, 37) slide more and more in front of the openings (15) in the tubular section (14) of the carrier element (80).

20. Winding body according to one of the preceding claims, characterized in that the adjusting means (23) has two-dimensional guide curves (24) which spiral in a plane perpendicular to the central longitudinal axis (112).

21. Winding body according to the preamble of claim 1, characterized in that the webs (13) are received on both ends of the Trägerele¬ elements (80) in slide guides.

22. A winding body according to claim 21, characterized in that the slide guides are designed as chambers (90, 92) in which sections of the webs (13) are guided in a form-fitting manner.

23. Wickelkδrper according to claim 21 or 22, characterized gekenn¬ characterized in that the guide of the webs (13) at an acute angle, in particular at an angle between 10 ° and 80 °, preferably at an angle of about 45 °, based on the longitudinal central axis (112) takes place.

24. Winding body according to claim 23, characterized in that inclined surfaces (98) or floors (94) are formed on both ends of the carrier element (80), on which guide surfaces (95, 97) of the webs (13) are supported with a corresponding bevel .

25. winding body according to claim 23 or 24, characterized gekenn¬ characterized in that on the tubular portion (14) of the Trägerele¬ elements (80) further inclined surfaces (99) are formed, which correspond to correspondingly shaped guide surfaces (96) of the webs (13) .

26. Winding body according to one of claims 1, 21 to 25, characterized in that the adjusting means (23) has three-dimensional guide curves (24) which spiral in a plane perpendicular to the central longitudinal axis (112) and with respect to the central longitudinal axis helical slope, the ratio of the slope of the spiral to the slope of the screw assumes in particular those values that result from the tangent of the angle of the web guide.

27. Wickelkδrper according to claim 26, characterized in that the adjusting means (23) has a frustoconical recess (115) on the guide curve side and is rotatably supported on the web element (110) corresponding slope on the carrier element (80).

28. Wickelkδrper according to the preamble of claim 1 or one of claims 21 to 27, characterized in that one end of the webs (13) molded pins (25) each engage in a Leit¬ curve (24) of the actuating means (23), the As a result of the actuation of the adjusting means (23), webs (13) are guided in a form-fitting manner in both the radial and the axial direction with respect to the longitudinal central axis (112).

29. Wickelkδrper according to claim 28, characterized in that at the other end of the webs (13) an angled nose (86) in the Be¬ area of the guide surface (97) is formed, which is overlapped by a portion (88) so that the webs ( 13) are guided in a positive manner in a channel (116).

30. Winding body according to one of claims 1, 21 to 29, characterized in that each web consists of two longitudinal strips (102, 106) which are interconnected by transverse webs (118).

31. A winding body according to claim 30, characterized in that the carrier element (80) has a tubular section (14) with peripheral openings (15) which cooperate with openings formed between the crosspieces (118) for the purpose of air outlet.

32. winding body according to one of claims 30, 31, characterized in that the transverse webs (118) are provided with bristle-shaped extensions (16).

33. winding body according to one of claims 1, 21 to 32, characterized in that a longitudinal strip (102). of the web (13) has a groove-shaped recess (104) into which at least portions of the longitudinal bar (106) of an immediately adjacent web engage in a positive manner in each radial positioning of the webs (13).

34. Wickelkδrper according to one of claims 30 to 33, characterized in that an edge region of the longitudinal strips (106) has comb-like slots (108) which correspond to the openings between the transverse webs (118).

35. winding body according to one of claims 30 to 34, characterized in that the longitudinal bar (106) at least in one axial section has a groove-shaped recess (96) which forms an inclined plane at the bottom, and is positively on a corresponding supports inclined plane or inclined surface (99) forming web on the carrier element (80).

36. winding body according to one of the preceding claims, characterized in that the adjusting means (23) is secured by means of a cap (30) and spring arms (31) formed thereon on the carrier element (80) by clipping.

37. winding body according to claim 36, characterized in that a central recess of the cap takes a button (30) which causes the expansion of a spring element (53) which in an annular groove of a mushroom-shaped area (52) of the carrier element (80) intervenes.

38. Wickelkδrper according to any one of the preceding claims, characterized by its use as a hair roller with a variably adjustable diameter.

39. Wickelkδrper according to one of claims 1 to 37, gekennzeich¬ net by its use as a brush attachment of a Warmluft¬ hair care device with a variably adjustable diameter, wherein the carrier element (80) is flowed through by warm air.

40. Wickelkδrper according to any one of claims 1 to 37, gekennzeich¬ net by its use as a hair treatment section of an electrically or gas-operated curling iron with a variably adjustable diameter.