EP2903473B1 - Epilation device comprising pivoting tweezers - Google Patents

Description

The present invention relates to a mechanical hair removal apparatus used for the removal of hair in order to perform body care and especially a hair removal head roller equipping such an epilation apparatus.

Mechanical depilatory devices are known comprising an epilation head equipped with a depilating roller movable in rotation about an axis parallel to the surface of the skin to be depilated. The hair removal roller is equipped with hair pulling tongs that open and close as the roller rotates.

A hair removal device of this type is described in particular in the document US 2005/0101971 in which tear-off pliers are formed by several rows of blades movable in translation bearing against fixed blades facing each other, all the movable blades of a row being carried by a peripheral shuttle of a rotating roller . Each shuttle comprises cams which, when driving the shuttle about a central axis, cooperate with cam paths formed by the two groove edges formed on the periphery of a central shaft rotatably connected to case of the device. The shuttles are arranged around the central shaft, being movable axially along this shaft, while being radially blocked by intermediate connecting elements constituting a tubular cage movable in rotation around the central shaft. The central shaft is more mobile in axial translation being subjected to the action of axial springs which induce the clamping force of all the clamps.

Such an apparatus can actually pull body hair. However, the fact that several movable blades are rigidly connected to each other induces an unequal distribution of the force of the springs so that not all the clamps have the same efficiency.

It is also known the document JP2001037533 which discloses an epilation apparatus comprising tongs distributed in several rows around a rotating cylinder, at the rate of two clamps per row. Each clamp has a fixed blade and a movable blade; the two movable blades of the two clamps of a row are connected by an elastic member which pushes the lower ends of the movable blades outwards so that these clamps remain normally open. Rods located on each side of the two movable blades push the lower ends thereof to close the clamps, through contact with rotating discs on the sides of the epilation head. A major disadvantage of this design is that the number of pairs of clamps arranged in a row is limited to two, which limits the effectiveness of the device during hair removal and considerably increases the duration of hair removal to obtain a result of proper hair removal.

It therefore appeared the need for an epilation device with an isostatic epilation head in the mechanical sense of the term, that is to say, all the clamps are actuated individually and without multiple blocking of degrees of freedom: blades thus have substantially the same efficiency which optimizes hair removal.

As such, the invention relates to a hair removal head roller comprising a fixed central shaft, each member forming a tubular portion of the roller and being rotated around the central shaft to be successively positioned in a working position. and tearing tongs arranged on each bar, each tearing pliers being formed of a fixed blade and a blade movable between an open position and a closed position, said roller comprising means for operating the configured movable blades on the one hand, for pivoting along transverse Y1 axes, towards the open position, all the moving blades on the bar arriving in the working position and, on the other hand, for pivoting along these transverse axes Y1 towards the closed position, all moving blades on the bar leaving the working position. According to the invention, the operating means comprise pivot connections arranged along the transverse axes Y1 transverse between the movable blades and the bars and the operating means comprise mobile rods arranged under each bar X3 axes, floating pivot links being arranged between the movable blades and each respective movable rod, and spring means configured on each movable rod between the adjacent movable blades to exert mutual efforts between these movable blades and balance these efforts. The floating pivot links are configured to allow the pivoting without locking of the movable blades relative to the bar, along the axes Y1, during a translation of the respective movable rod along the axis X3. The configuration of the spring means on each movable rod between each of the two adjacent movable blades makes it possible to exert mutual forces between the movable blades and to balance these forces in order to compensate for the operating tolerances of said movable blades due to the pinching of hairs. different diameters. According to the hair removal head roller according to the invention, the operating means comprise two fixed flanges between which the movable rods are arranged, at least one of the two flanges comprising on its internal face a circular cam path on which bear the contiguous ends of the movable rods and configured to translate along the axis X3 the movable rod under the respective bar arriving in the working position, in an active position for pivoting the movable blades to the open position, wherein the operating means comprise return means configured to maintain said ends of the movable rods against said cam path and said movable rods each comprise abutment means against the outer faces of the proximal and distal mobile blades during a translation of said movable rod according to axis X3, which allows when the bar leaves its working position, to translate in translation. the opposite direction, along the axis X3, the rod movable in an inactive position allowing the pivoting of said movable blades to the closed position. Thus, according to the invention, when one of the bars of the hair removal head roller is in the working position, the cam path translates the corresponding movable rod disposed under said bar. This translation of the movable rod makes it possible, thanks to the abutment means, to push on the external face of the proximal movable blade, that is to say the one closest to the cam path, so as to pivot said proximal movable blade. in open position. The spring means furthermore allow the force to be mutually transmitted to the other movable blades so as to push and rotate them also in the open position. Conversely, when this bar leaves said open position, the return means and the cam path ensure a translation of the movable rod in the opposite direction, allowing the stop means to push on the outer face of the distal movable blade, it is that is farthest from the cam path, so as to pivot the distal movable blade in the closed position. The spring means furthermore make it possible to mutually transmit the force to the other movable blades so as to push them and also to rotate them in the closed position while compensating for the clamping positions of the movable blades, due in particular to the pinching of hairs of different diameters. The pivoting of the movable blades on the bar, independently of each other, is furthermore possible thanks to the floating pivot links which allow an operating tolerance.

It is furthermore understood that this design makes it possible to integrate a large number of tear-off pliers on each bar, which makes it possible to optimize the pulling of hairs by limiting the duration of depilation.

It is also understood that this design of the hair removal head roller allows to have a single actuation for all the clamps on a bar, while having an independent and balanced effort on each of these clamps.

In the description, the term "proximal", the fact that an element is disposed closest to the cam path on the flange relative to other elements of the same nature. Similarly, the term "distal", the fact that an element is disposed farthest from the cam path on the flange relative to other elements of the same nature.

According to a preferred design of pivot links floating on the epilator head roller object of the invention, the movable blades each comprise a lower portion comprising an orifice configured to receive the respective movable rod with a mounting set for tilting the movable blades in the open or closed position during a translation of the movable rod along the axis X3.

According to a preferred design of the hair removal head roller according to the invention, the return means comprise at least one helical spring arranged along the axis X 3 and exerting a force against the movable rod to hold it in abutment against the path of cam. This coil spring can operate in compression or traction, depending on the design of the cam path and the pivoting direction of the movable blades in the open position and in the closed position. In addition, several coil springs can be provided depending on the design of the movable rods.

According to a design of the hair removal head roller object of the invention, the abutment means consist of a shoulder portion on the movable rod. This shoulder portion is for example constituted by a shoulder arranged directly on the movable rod. Variations stepped portions are possible without departing from the scope of the invention, such as the use of circlips mounted by snapping into a groove on the movable rod.

According to a design of the epilator head roller object of the invention, the spring means consist of coil springs mounted on the movable rod between the movable blades. These coil springs work in compression. However, it is possible to envisage design variants of the hair removal apparatus with coil springs that work in tension. It is further understood that the locking of these helical springs on the movable rod, along the axis X3, is provided by the stop means.

According to a design of the epilator head roller object of the invention, the adjoining end of the movable rod comprises a guide piece on the cam path, for example a pin or a rod, which bears on the path of cam. This ensures proper guidance and maintenance of the end of the movable rod in the guide path.

According to a design of the hair removal head roller object of the invention, rolling means are arranged on the cam path. This limits the friction between the cam path and the end of the movable rod or the guide pin.

According to a variant of the design of the hair removal head roller according to the invention, the movable rods each comprise two parts, the two flanges each comprising on their inner face a cam path, the opposite ends of the two parts being respectively in abutment. against said adjoining cam paths.

In a preferred embodiment according to this design variant of the hair removal head roller, the two parts of the mobile rods are symmetrical, the cam paths on the two flanges being opposite, the movable blades mounted respectively on the two symmetrical pivoting parts. in the opposite way.

Advantageously, the hair removal head roller comprises a tubular cage mounted in pivot connection with axis X1 on the central shaft, the bars being mounted longitudinally on the tubular cage along axis X2. This facilitates the design and assembly of the components of the hair removal head roller.

The invention also relates to an epilation apparatus which comprises a body, an epilation head roller according to the invention and means for activating said roller.

According to the depilatory apparatus according to the invention, this comprises assembly means arranged between the body and the central shaft of the hair removal head roller and configured to fix said central shaft with said body.

According to a design mode of these assembly means on the depilatory apparatus object of the invention, they are configured to allow the disassembly of the hair removal head roller of said apparatus. This has the advantage of disassembling the hair removal head roller to replace it with another hair removal head roller or simply to carry out its cleaning, or to replace it with another body care accessory adaptable on said apparatus.

According to the depilatory apparatus according to the invention, the activation means are configured to rotate the bars of the hair removal head roller around the central shaft.

According to the hair removal head roller according to the invention, for the various design variants, the fixed and movable blades are made of metal or plastic. The blades can be arranged directly on the bar or positioned on inserts of any material, these inserts can be fixed or overmolded on the bar.

• La figure 1 illustre une vue d'ensemble en perspective d'un appareil d'épilation selon l'invention ;
• La figure 2 illustre une vue de côté de la figure 1, partiellement éclatée, montrant des composants de l'appareil d'épilation objet de l'invention ;
• La figure 3 illustre une vue en perspective, partiellement éclatée, montrant des composants du rouleau de tête d'épilation ;
• La figure 4 illustre une vue en perspective d'une barrette en position de travail, une tige mobile agencée sous cette barrette et en appui contre le chemin de came, les lames mobiles étant en position ouverte sur la barrette ;
• La figure 5 est une vue de face de la figure 4 avec les lames mobiles en position ouverte ;
• La figure 6 est une vue de face correspondant à la figure 5 avec les lames mobiles en position fermée ;
• La figure 7 illustre une variante de réalisation d'un appareil d'épilation selon l'invention, montrant notamment une barrette avec deux séries de pinces symétriques et avec une tige mobile comprenant deux parties symétriques.

The characteristics of the hair removal head roller and of the hair removal apparatus, which are the subject of the invention, will emerge on reading the following description of two nonlimiting embodiments based on figures, among which:

• The figure 1 illustrates an overall perspective view of an epilation apparatus according to the invention;
• The figure 2 illustrates a side view of the figure 1 partially exploded showing components of the hair removal apparatus object of the invention;
• The figure 3 illustrates a perspective view, partially exploded, showing components of the hair removal head roller;
• The figure 4 illustrates a perspective view of a bar in the working position, a movable rod arranged under this bar and resting against the cam path, the movable blades being in the open position on the bar;
• The figure 5 is a front view of the figure 4 with the moving blades in the open position;
• The figure 6 is a front view corresponding to the figure 5 with the movable blades in the closed position;
• The figure 7 illustrates an alternative embodiment of an epilation device according to the invention, showing in particular a bar with two sets of symmetrical clamps and with a movable rod comprising two symmetrical parts.

As illustrated on Figures 1 and 2 , the hair removal apparatus 1 according to the invention comprises a body 2 for example consisting of two half-shells 2a, 2b monoblocks defining together on the one hand, by their outer surfaces 3a, 3b, a gripping zone of the hair removal apparatus 1 and, on the other hand, a housing for confinement and maintenance of various electrical and mechanical functional elements constituting Thus, the body 2 encloses an electric motor 4 associated with transmission means 5 of the rotational movement of the output gear 6 of the motor 4. According to the illustrated example, the transmission means 5 comprise a gear train with axes parallel to the axis of rotation of the motor. Other variants are however possible without departing from the scope of the invention.

The hair removal apparatus 1 comprises an epilation head 7 which comprises a hollow body 8 delimiting an epilation chamber 9 inside which is disposed an epilation head roller 10 which is flush with the level of a hair removal chamber. window 11 arranged in the hollow body 8. The hair removal head roller 10 is partly rotatable about an axis X1 and is rotated via the transmission means 5 by the electric motor 4. The roller depilating head 10 comprises at its periphery clamps 12 opening and closing as the spinning head roller 10 is rotated. Thus, the electric motor 4 and the transmission means 5, in particular, allow the activation of the hair removal head roller 10.

The hair removal head roll 10 comprises, as illustrated in Figures 2 to 7 , a central shaft 13 secured to the body 2 is directly or via a movable part for adjusting the angular position of the central shaft 13 relative to the body 2. According to an embodiment of the invention, the invention, the assembly of the hair removal head roller 10 comprises a reversible attachment means to the body 2 (not shown) within the reach of the skilled person to make the roll removable. The hair removal head roller 10 also comprises a tubular cage 14 which carries the tear-off tongs 12 and which is rotatable along the axis X1 around the central shaft 13 by being driven via a gear 15 secured to the tubular cage 14 which meshes with the transmission means 5. According to the example illustrated in FIG. figure 3 , the tubular cage 14 is configured to allow the attachment of six bars 16, as appears in FIG. figure 4 by the external form hexagonal of said tubular cage 14. These bars 16 each carry a row of six gripping pliers 12 aligned along an axis X2 parallel to the axis X1. These strips are preferably all of similar design; the following description will therefore refer to a single bar 16, as it appears on the Figures 3 to 7 . The number of bars 16 and the number of tear-off tongs 12 may, however, be greater depending on the size and dimensions of the elements constituting the epilation head roll 10.

Each tear-off pliers 12 is formed of a fixed blade 17 and a movable blade 18. The fixed blades 17 are rigidly connected to the bar 16 and consequently to the tubular cage 14, to the extent that according to the illustrated example the fixed blades 17 of the same row form an integral part of the corresponding bar 16. Each movable blade 18 is capable of moving between an open position, visible in figures 4 and 5 , according to which the movable blade 18 is moved away from the fixed blade 17 and a closed position, visible in figure 6 according to which the movable blade 18 is pressed against the fixed blade 17. In order to ensure the movements of the movable blades 18, the epilation head roller 10 comprises operating means 19.

These operating means 19 comprise pivot connections 20 between the movable blades 18 and the bar 16. These pivot links 20 are arranged along transverse axes Y1 on the bar 16, that is to say perpendicular to the axis X2. For this purpose the movable blades 18 each comprise a central cylindrical portion 18a of Y1 axis and the bar 16 comprises circular portions 16a of Y1 axis in which the central cylindrical portions are snapped to ensure their mounting in pivot connection. These movable blades also each comprise an upper part 18b constituting the head of the blade coming into contact with the fixed blade and a lower part 18c which extends under the bar 16 and comprises a through hole 21, illustrated in FIG. figure 4 .

The operating means 19 comprise movable rods 22, as illustrated in FIG. Figures 4 to 7 . Their number is identical to the number of bars 16. Their design is preferably also identical. In the rest of the description, reference will be made so to the single movable rod 22 illustrated on these Figures 4 to 7 , as for the bar 16.

As illustrated on the figure 4 , the movable rod 22 is disposed under the bar 16 and passes through the passage holes 21 arranged on the lower portions 18c of the movable blades 18 to form a floating pivot connection. The passage orifices 21 are sized to leave an assembly gap with the movable rod 22, which allows the movable blades 18 to pivot sufficiently along the axes Y1 despite the presence of the movable rod 22 pivotally mounted on said lower parts 18c. , along an axis X3 substantially parallel to the axis X2. This avoids any risk of blockage between the movable rod 22 and the movable blades 18.

The operating means 19 also comprise two flanges 23, 24 arranged in the end portions of the central shaft 13 to which they are attached. Fixing the flanges 23, 24 on the central shaft 13 can be carried out directly or indirectly, by any fastening means known to those skilled in the art. One can also consider making the central shaft 13 and the flanges 23, 24 in one piece. Between these flanges 23, 24 is disposed the movable rod 22, as illustrated in these Figures 4 to 7 . It is the same for all the movable rods 22 associated with the other bars 16.

In the embodiment illustrated in Figures 4 to 6 the movable rod 22 consists of a single part. In addition, the first flange 23 comprises on its inner face 23a, a cam path 25 of circular shape, as illustrated in FIG. figure 4 . The movable rod 22 includes a proximal end 22a adjacent to the cam path 25 and abutting against said cam path 25. This proximal end 22a is preferably, as illustrated in FIGS. figures 4 and 5 provided with a guiding pin 26 which is positioned in said cam path 25. The movable rod 22 also includes a distal end 22b, illustrated in FIG. figure 4 to 6 , at which is arranged a guide rod 27 which extends along the axis X3 outwardly of said distal end 22b and which receives a helical spring 28 mounted in compression between a shoulder 29 arranged at this end distal 22b and the face internal 24a of the second flange 24. This inner face 24a may comprise a guide path of circular shape (not shown in the figures), such as a circular groove, for receiving and guiding the end 28a of the coil spring 28 .

As illustrated in figure 4 , the cam path 25 comprises a flat circular portion or grooved 25a which extends substantially 360 ° on the inner face 23a of the flange 23 and is continued by a small projecting circular portion 25b. The cam path 25 is configured to exert a thrust against the guide pin 26 in the direction of the arrow 30 and thus move the movable rod 22 in this direction along the axis X3, when the bar 16 reaches a position of a work enabling depilation, that is to say when the hair removal head roller 10 rotates along the axis X 1 and brings this bar 16 into the zone of the window 11 on the body 2, as illustrated in FIG. figure 1 and 5 . In this position, the guide pin 26 bears against the projecting circular portion 25b and the compression of the coil spring 28 is greater. Conversely, this cam path 25 is configured to allow said coil spring 28, in the compressed state, to push on the distal end 22b of the movable rod 22 and move it in the direction of the arrow 31 along the axis X3 , while holding the guiding pin 26 in abutment against said cam path 25, when the bar 16 pivots along the axis X1 and starts to leave the working position. In this position, the guiding pin 26 penetrates the planar or grooved circular portion 25a and the coil spring 28 relaxes slightly while remaining compressed.

According to this design mode illustrated in figure 4 to 6 , the movable rod 22 comprises two stops 32, 33. The first stop 32 is located on the side of the proximal end 22a of the movable rod 22 and is configured to bear against the outer face 34 of the lower part 35c of the proximal movable blade 35 on the bar 16, during a displacement of the movable rod 22 in the direction of the arrow 30. The second stop 33 is located on the side of the distal end 22b of the movable rod 22 and is configured to bear against the outer face 36 of the lower part 37c of the movable blade distal 37 on the bar 16, during a displacement of the movable rod 22 in the direction of the arrow 31.

As illustrated on Figures 4 to 6 , helical springs 38 are slidably mounted along the axis X3 on the movable rod 22 and are arranged between the movable blades 18, 35, 37. These coil springs 38 are mounted in compression between two adjacent movable blades 18, 35, 37 .

The first stop 32 is for example constituted by a circlip to allow the mounting of the movable rod 22 through the orifices 21 on the lower parts 18c, 35c, 37c of the movable blades 18, 35, 37 and the positioning of the coil springs. 38 between said movable blades. The second stop 33 is preferably formed by the shoulder 29 arranged at the distal end 22b of the movable rod 22.

During a displacement of the movable rod 22 in the direction of the arrow 30, the first stop 32 bears against the outer face 34 of the proximal movable blade 35, allowing the pivoting of said proximal movable blade 35 along the axis Y1 , from the closed position illustrated in figure 6 towards the open position illustrated in figure 5 . The coil springs 38 then make it possible to mutually exert a thrust on the other movable blades 18, 37 in the direction of the arrow 30 and also to rotate them from the closed position to the open position. Conversely, during a displacement of the movable rod 22 in the direction of the arrow 31, the second stop 33 bears against the outer face 36 of the distal movable blade 37, allowing the pivoting of said distal movable blade 37 according to FIG. Y1 axis, of the open position illustrated in figure 5 towards the closed position illustrated in figure 6 . The coil springs 38 then make it possible to mutually exert a thrust on the other movable blades 18, 35 in the direction of the arrow 31 and also to rotate them from the open position to the closed position. By choosing a suitable stiffness for these coil springs 38 and also for the helical spring 28 allowing the return of the movable rod 22, almost simultaneous and instantaneous pivoting of all the movable blades 18, 35, 37 on the bar 16 is achieved in the open position and in the closed position. In addition, the coil springs 38 and the links pivots 20 allow the movable blades 18, 35, 37 to exert identical pinching forces on all the bristles whose diameter is variable since these pivot links 20 are independent of each other and that the forces exerted by said coil springs on the movable blades 18, 35, 37 are balanced.

On the design variant illustrated in figure 7 , the movable rod 22 consists of two parts 39, 40 between which is arranged a central guide shaft 41 which is slidably mounted along the axis X3 inside the two contiguous ends 39a, 40a of said two parts 39, 40 This central guide shaft 41 slidably receives a central helical spring 42 which urges said two adjoining ends 39a, 40a in opposite directions illustrated by the arrows 43, 44. At the opposite ends 39b, 40b of the two parts 39, 40 are respectively fixed two extreme guide rods 47, 48. Two flanges 45, 46 are also attached directly or indirectly to the central shaft 13, as for the embodiment described above and illustrated in FIG. figure 4 to 6 . The first flange 45 comprises on its inner face 45a a cam path (not shown) on which abuts the end 47a of the first extreme guide rod 47, thanks to the return force exerted by the central coil spring 42 in the direction of the arrow 43. The second flange 46 also comprises on its inner face 46a a cam path (not shown) whose design is however symmetrical with respect to the cam path on the first flange 45. The end 48a of the second extremal guide rod 48 remains in abutment against said guide path, thanks to the return force exerted by the central helical spring 42 in the direction of the arrow 44. These cam paths on the flanges 45, 46 are not not illustrated on the figure 7 . Their design is, however, reversed with respect to the cam path 25 of the flange 23 illustrated in FIG. Figures 4 to 6 , for the first embodiment described above. That is to say, this cam path comprises a flat circular portion or slightly grooved which extends over almost 360 ° and is continued by a small indented circular portion, in contrast to the projecting circular portion 25b for the embodiment of Figures 4 to 6 . The ends 47a, 48a of the extreme guide rods 47, 48 penetrate into these indented circular portions when the bar 16 arrives in the working position.

We see on the figure 7 that the bar 16 comprises two series of clamps 49, 50, arranged symmetrically relative to each other and comprising for example each three clamps. The design of these clamps is similar to that described above for the embodiment illustrated in FIG. figure 4 to 6 , taking into account however the symmetry of the two series of clamps 49, 50, as illustrated in FIG. figure 7 .

The two adjoining ends 39a, 40a of the two parts 39, 40 of the movable rod 22 each comprise a stop 51, 52 constituted for example by a shoulder on each portion 39, 40. Similarly, the two opposite ends 39b, 40b of said portions 39, 40 each comprise an abutment 53, 54 preferably consisting of a circlip snapped into a groove, on each portion 39, 40, so as to allow the mounting of the two parts 39, 40 through the orifices (not shown but similar to orifice 21 on the figure 4 ) on the lower parts 55c of the movable blades 55 and, the sliding assembly along the axis X3 of the coil springs 56 on the two parts 39, 40, as illustrated in FIG. figure 7 .

When the bar 16 on the hair removal head roller 10 rotates along the axis X1 and reaches the working position, that is to say the area of the window 11 on the hair removal apparatus 1, the end 47a of the guide rod 47 of the first portion 39 of the movable rod 22 penetrates into the indented portion of the cam path arranged on the first flange 45, which allows due to the thrust exerted by the central coil spring 42, to move the first portion 39 in the direction of the arrow 43. The stop 51 then presses on the outer face 57 of the distal movable blade 58 to rotate it along the axis Y1 of a closed position illustrated in FIG. figure 7 , to an open position comparable to the open position of the figure 5 , taking into account, however, symmetry. The pivoting of the distal movable blade 58 makes it possible to act on the helical springs 56 which push the other movable blades 55 mutually to pivot them along the axis Y1 towards the open position. Concomitantly, when this bar 16 reaches the working position, the end 48a of the guide rod 48 of the second portion 40 of the movable rod 22 enters the indented portion of the cam path arranged on the second flange 46, which allows because of the thrust exerted by the central helical spring 42, to move the second portion 40 in the direction of the arrow 44. The stop 52 then presses on the outer face 59 of the distal movable blade 60 to rotate it along the axis Y1 of a position closed illustrated figure 7 , to an open position comparable to the open position of the figure 5 . The pivoting of the distal movable blade 60 makes it possible to act on the helical springs 56 which push the other movable blades 55 mutually to pivot them along the axis Y1 towards the open position. The concomitant spacing of the two parts 39, 40 allows the central coil spring 42 to relax slightly while remaining compressed between the two contiguous ends 39a, 40a to keep the opposite ends 39b, 40b in abutment against the cam paths of the flanges 45 , 46.

When the bar 16 is about to leave the working position, the end 47a of the guide rod 47 of the first portion 39 of the movable rod 22 leaves the indented portion of the cam path arranged on the first flange 45, which makes it possible, because of the thrust exerted in the direction of arrow 44 on said end 47a by the cam path, to move the first part 39 in the direction of this arrow 44. The stop 53 then bears on the outer face 61 of the proximal movable blade 62 to rotate it along the Y1 axis from the open position to the closed position. The pivoting of the proximal movable blade 62 makes it possible to act on the helical springs 56 which mutually push the other movable blades 55, 58 to pivot them along the axis Y1 towards the closed position. Concomitantly, when the bar 16 is about to leave the working position, the end 48a of the guide rod 48 of the second portion 40 of the movable rod 22 out of the indented portion of the cam path arranged on the second flange 46, which allows because of the thrust exerted in the direction of the arrow 43 on said end 48a by the cam path, to move the second portion 40 in the direction of the arrow 43. The stop 54 then presses on the face external 63 of the proximal movable blade 64 to rotate it along the axis Y1 from the open position to the closed position. The pivoting of the proximal movable blade 64 makes it possible to act on the coil springs 56 which mutually push the other movable blades 55, 60 to pivot them along the axis Y1 towards the closed position. The concomitant bringing together of the two parts 39, 40 increases the compression of the central helical spring 42.

By choosing a suitable stiffness for the coil springs 56 and the central coil spring 42, it ensures a virtually instantaneous and simultaneous movement of all the movable blades on the two sets of clamps 49, 50. In addition this design also allows to balance the clamping forces exerted by all the movable blades on the two series of clamps 49, 50, despite differences in the diameter of pinched bristles in the clamps.

Other design variants are conceivable without departing from the scope of the invention. One could, for example, on the basis of the two embodiments described above, provide inverted and / or symmetrical designs of the components of the hair removal head roller 10, including the directions of the clamps, the movable rods, the position of the helical springs, the direction of the cam paths on the internal faces of the flanges ...

To limit the friction between the guide pin 26 and the cam path 25, according to the first embodiment described above, it is possible to provide on said cam path 25 balls or rollers (not shown) on which moves in support said guiding pin 26. This is also conceivable for the second embodiment of the figure 7 , between the guide rods 47, 48 and the two flanges 45, 46. It is the same for all other variants.

Claims (14)

1. Epilator head roller (10) comprising a secured central shaft (13), strips (16) each consisting in a tubular portion of the roller and being rotated around the central shaft to be positioned successively in a work position and, removal clamps (12, 49, 50) arranged on each strip, each removal clamp being formed of a secured blade (17) and a mobile blade (18, 35, 37, 55, 58, 60, 62, 64) between an open position and a closed position, said roller comprising means for moving (19) the mobile blades, configured on the one hand, to pivot along the transverse axes Y1, towards the open position, all mobile blades on the strip arriving in the work position and on the other hand, to pivot along these transverse axes Y1, towards the closed position, all mobile blades (18, 35, 37, 55, 58, 60, 62, 64) on the strip (16) leaving the work position, the moving means (19) comprising pivot connections (20) arranged along the transverse axes Y1 between the mobile blades (18, 35, 37, 55, 58, 60, 62, 64) and the strips (16), and the moving means (19) comprising mobile rods (22) arranged under each strip (16) along the axes X3, the floating pivot connections being arranged between the mobile blades and each respective mobile rod (22), and the spring means (38, 56) configured on each mobile rod (22) between the adjacent mobile blades to exert joint forces between these mobile blades and balance these forces, characterised in that the moving means comprise two secured flanges (23, 24, 45, 46), between which are arranged the mobile rods (22), at least one (23, 45, 46) of the two flanges comprising, on the internal face (23a, 45a, 46a) thereof, a circular cam track (25) whereon the adjoining ends (26, 47a, 48a) support the mobile rods and are configured to extend the mobile rod under the respective strip arriving in the work position along the axis X3, into an active position enabling the pivoting of the mobile blades towards the open position, wherein the moving means comprise return means (28, 42) configured to keep supporting said ends of the mobile rods against said cam track and, said mobile rods each comprise stopper means (32, 33, 51, 52, 53, 54) against the external faces (34, 36, 57, 59, 61, 63) of the proximal (35, 62, 64) and distal (37, 58, 60) mobile blades during an extension of said mobile rod along the axis X3.
2. Epilator head roller (10) according to claim 1, wherein the mobile blades (18, 35, 37, 55, 58, 60, 62, 64) each comprise a lower part (18c) comprising an orifice (21) configured to receive the respective mobile rod (22) with an assembly gap enabling the tilting of the mobile blades into an open or closed position during an extension of this mobile rod along the axis X3.
3. Epilator head roller (10) according to claim 1, wherein the return means comprise at least one helicoidal spring (28, 42) arranged along the axis X3 and exerting a force against the mobile rod (22) to keep it supported against the cam track (25).
4. Epilator head roller (10) according to one of claims 1 to 3, wherein the stopper means (32, 33, 51, 52, 53, 54) are constituted of a portion supported on the mobile rod (22).
5. Epilator head roller (10) according to one of claims 1 to 4, wherein the spring means are constituted of helicoidal springs (38, 56) assembled on the mobile rod (22) between the mobile blades (18, 35, 37, 55, 58, 60, 62, 64).
6. Epilator head roller (10) according to one of claims 1 to 5, wherein the adjacent end (22a) of the mobile rod (22) comprises a guiding part (26, 47, 48) on the cam track (25).
7. Epilator head roller (10) according to one of claims 1 to 6, wherein the roller means are arranged on the cam track (25).
8. Epilator head roller (10) according to one of claims 1 to 7, wherein the mobile rods (22) each comprise two parts (39, 40), the two flanges (45, 46) each comprising, on their internal face (45a, 46a), a cam track, the opposite ends (39b, 40b) of the two parts being respectively supported against the adjacent cam tracks.
9. Epilator head roller (10) according to claim 8, wherein the two parts (39, 40) of the mobile rods (22) are symmetrical, the cam tracks on the two flanges (45, 46) being opposite, the mobile blades (55, 58, 60, 62, 64) assembled respectively on these two symmetrical parts pivoting in an opposite direction.
10. Epilator head roller (10) according to one of claims 1 to 9, wherein a tubular cage (14) assembled in connection, pivoting from axis X1 on the central shaft (13), the strips (16) being assembled longitudinally on the tubular cage along the axes X2.
11. Epilator device (1) comprising a body (2), an epilator head roller (10) according to any one of claims 1 to 10 and the means for activating (4, 5) the roller.
12. Epilator device (1) according to claim 11, which comprises assembly means arranged between the body (2) and the central shaft (13) of the epilator head roller (10) and configured to secure said central shaft to said body.
13. Epilator device (1) according to claim 12, wherein the assembly means are configured to enable to disassembly of the epilator head roller (10) from said device.
14. Epilator device (1) according to one of claims 11 to 13, wherein the activation means (4, 5) are configured to rotate the strips (16) of the epilator head roller (10), around the central shaft (13).

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